Some standard content:
Machinery Industry Standard of the People's Republic of China
Jet-suction cutting torch
Subject content and scope of application
JB/T 6970-93
This standard specifies the jet-suction cutting torch Torch type, structure, interchangeable parts, connection parts, basic parameters, technical requirements, test methods, acceptance rules, marking and packaging.
This standard applies to manual jet-suction cutting torches with oxygen-acetylene preheated flames. 2 Reference standards
GB 192
GB 196
GB197
Basic profile of ordinary threads
Basic dimensions of ordinary threads
Tolerances and fits
Common thread
Hose joints for welding and cutting
GB 5107
JB/GQ·F9003 jet suction welding torch and cutting torch product quality classification 3 types , structure, interchangeable parts and connection parts 3.1 The cutting torch adopts a fixed injection pipe, and the cutting nozzle with different cutting oxygen aperture sizes can be replaced to meet the needs of cutting workpieces of different thicknesses. The cutting nozzle can be combined or integral.
3.2 Model representation method
The model number of the jet-suction cutting torch consists of a Chinese pinyin letter, indicating the serial number and specifications of the structure and type. When modifying, the letters A, BC, and D can be appended to the specification as the number of modifications. For example, G
100
means the maximum thickness of cutting mild steel is 100mm, means jet-suction type
means manual
means the first letter of cutting (Ge)| |tt||3.3 The structure and parts names of the cutting torch are shown in Figure 1 and Table 1. The Ministry of Machinery Industry of the People's Republic of China approved 1993-07-27 1994-07-01 Sales
567
568
JB/T 6970--93
Picture| |tt||order
1
2
3
4
5
6
number||tt ||name
cut
weigh
mouth
cutting nozzle nut
cutting nozzle connector
shoot straw
spray
Mouth
Oxygen valve needle
JB/T 6970--93
Table 1
Sequence
3.4 ??Cutting torch interchange Parts and related connection parts regulations 3.4.1 The cutting nozzle should comply with the requirements in Figure 2 and Table 2. 45
Figure 2
Table 2
Type
L
t
12
d
di
dz
No.
Cutting mouth No.
D
D
de
2.9
0.7
2.4
G01-30
≥55
16
10
13-8: 268
4.5
7
16
2
3.1
0. 9
2.6
3
3.3
1.1
2.8
1
3.5
1.0
2.8
G01-100
265
18
11.5
15-8.28
5.5
8
18
2
3.7
1.3
3.0
3
4.1
1.6
3.3
7
9|| tt||10
11
No.
1
4.5
1.8
3.8
Name||tt| |Weighing
Middle body
Rear connector
Oxygen nut
B explosion nut
Teaching pipe joint
G01-300| |tt||≥75
19
12
16.5=8:288
5.5
8
19||tt| |3
5.0
2. 2
4.2
5.5
2.6
4.5
mm||tt| |4
: 6.0
3.0
5.0
569
JB/T 6970—93
3.4.2 The cutting nozzle nut should Comply with the requirements of Figure 3 and Table 3. Figure 3
Table 3
Type
No.
G01-30
G01-100
G01-300
MD
M18X1.5
M20X1.5
M22×1.5
3.4.3
The cutting nozzle joint should comply with the requirements of Figure 4 and Table 4 . Model
No.
G01-30
G01-100
G01-300
570
Md
M18× 1.5
M20X1.5
M22X1.5
D
4.5
5
5.5
Di||tt ||13+g.110
15+110
16.5+g.110
Figure 4
Table 4
D
12
14
15
GW
D
13.8
16.5
17
t| |tt||8
8
9
9.5
11.5
11.5
11
: 11|| tt||12
8
9
9
mr
mm
3.4.4 The rear connector should comply with Figure 5 Provisions. 3.4.5 Oxygen nut M16×1.5;GB5107JB/T6970—93
Figure 5
3.4.6 Yiyi nut M16×1.5 Left: GB51073.4.7 Hose joint type A 5.5GB5107||tt ||Main parameters and basic parameters
4
4.1 The main parameters of the cutting torch should comply with Table 5. Table 5
Type
No.
Basic parameters of turning torch for cutting mild steel thickness
G01-30
3～30
Should comply with the requirements in Table 6. 4.2
Cutting mouth number
Type
No.
G01-30
G01-100
G01-300
5Technical requirements
0.2
0.3
0. 5
Oxygen working pressure, MPa
2
3
0.25
0.4
0.65
0.3
0.5
0.8bzxZ.net
4
1.0
Table 6
BQuickly
Use pressure
MPa
0.001
0.1
G01-100
10--100
replaceable
number
3
4
1
0.7
1.0
1.8
x91
G01-300
100～300
Oxygen aperture diameter of cutting nozzle, mm
2
0.9||tt| |1.3
2.2
3
4
1.1
1.6
2.6
3.0
mm
cut
torch
total length
mm
500
550
650
5.1 Under the oxygen working pressure specified in this standard, when the acetylene pressure is 0.006~0.008MPa, the visible cutting oxygen flow length in the flame of the cutting torch is listed in Table 7.
571
type
number
mouth number
visible cutting oxygen flow length
≥60
G01-30
2
≥70
JB/T 6970-93
Table 7
G01-100
2
80
80
90
5.2 Each air valve should ensure that it can flexibly close the air path and adjust the flow rate evenly. 3
≥100
≥110
G01-300
2
≥130
2150
mm|| tt||4
≥170
5.3 The flame of the cutting torch should burn stably. The flame shape is correct and symmetrical, and turbulence, eccentricity, and continuous tempering are not allowed. It can be seen that the cutting oxygen flow is not allowed to be deflected. When the wind with a wind speed of 10m/s blows vertically towards the flame, the flame core of the flame should remain stable. 5.4 All connections and gas valves of the cutting torch are not allowed to gas under the following air inlet pressures: In the oxygen passage: increase the maximum oxygen working pressure by 50%, but the maximum is 1.2MPa; in the second block and mixed gas passages: the pressure is 0.25MPa. b.
5.5 All gas passage parts of the cutting torch should be made of corrosion-resistant materials. Acetylene passage parts cannot be made of alloys with a content greater than 70%. 5.6 The cooperation between the cutting nozzle and the cutting nozzle joint, and the cooperation between the hose joint and the rear connector should ensure airtightness and interchangeability. All gas passage parts must be degreased before assembly. 5.72
5.85
The thread should comply with the relevant provisions of GB192, GB196 and GB197. 5.9 The threads of each sealing nut of the cutting torch should have an adjustment margin of 1 to 3 pitches. 5.10 The gas consumption of the cutting torch is specified by the manufacturer in the instruction manual. 5.11
The appearance of the cutting moment should be beautiful and clean, without obvious mechanical damage, bending irregularity and surface defects. 5.12 When the nozzle is supplied alone, its performance shall comply with the relevant provisions of Article 3.4.1, Chapter 4, Article 5.1, Articles 5.3~5.7 and Article 5.11 of this standard.
6 Test methods and acceptance rules
6.1 Test methods
6.1.1 Air tightness test: The cutting torch does not contain The grease gas lasts 20 seconds in the water with the air valve closed and open. No air leakage is allowed in each air valve and all connections. 6.1.2 Combustion test: Under the oxygen working pressure specified in this standard, conduct a combustion test when the acetylene pressure is 0.006~0.008MPa, and check whether the cutting oxygen flow length and fire melt performance comply with Article 5.1, Table 7 and Article 5.3 of this standard. provisions. 6.1.3 Stability test in wind
Ignite the cutting torch equipped with No. 2 cutting nozzle (No. 3 cutting nozzle for G01-300 type), adjust it to a neutral flame according to the rated flow rate, and after stabilizing for 30 seconds, use The flame is perpendicular to the wind direction and placed at a wind speed of 10m/s. If the flame core of the cutting torch can burn normally within 10 seconds, it is qualified. If the flame core jumps, extinguishes or tempers, the test is allowed to be repeated twice, and the flame core can Those who burn normally are still qualified. 6.1.4 Anti-tempering test
The test device is shown in Figure 6.
572
Copper test plate
JB/T6970—93
Guide flame
Dry rotation center
Figure 6 Tempering test device
Note: 1-511+4f2+2031=1.25+1.75d2342=0.50+0.75d2. 6.1.4.1 Test conditions
The G01-100 cutting torch No. 2 cutting tip is used for the test. The end face of the cutting nozzle is parallel to the surface of the grooved copper plate. The distance between the cutting torch and the copper plate is 1.5mm, the rotation speed of the copper plate is 10r/min, and the test radius r is 165mm. 6.1.4.2 Procedure
After ignition, adjust to the standard neutral flame. After 30 seconds, place the cutting torch on top of the rotating copper plate. During the test, the flame is not allowed to be adjusted. The fire is extinguished while rotating, and re-ignition is allowed. . 6.1.4.3 Evaluation
If the copper plate rotates 5 times without continuous tempering, the test is qualified. If continuous tempering occurs, stop the test immediately, cool and clean the cutting torch (mouth), and then repeat the second test (cooling after each test). If continuous tempering does not occur, it is still qualified. 6.2 Acceptance rules
6.2.1 Appearance quality shall comply with the provisions of Article 5.11 of this standard. 6.2.2 Factory products must have product certificates and instructions for use. 6.2.3 Users have the right to inspect the delivered products according to the test methods and acceptance rules specified in this standard. 6.2.4 Appearance, air tightness test, combustion test, wind stability test, tempering resistance test and inspection of the dimensions of interchangeable parts and connection parts specified in Article 3.4 of this standard, the random inspection quantity can be according to JB/GQ ·Carry out the sampling method specified in F9003. 573 | | tt | | JB/T6970—93 | If there are still unqualified items after re-inspection, no matter how many, the batch of products will be regarded as unqualified and must be repaired and resubmitted for acceptance. 7 Marks and Packaging
7.1 Marks
7.1.1 The cutting torch should be marked with: manufacturer name, trademark, model, year of manufacture and oxygen and acetylene inlet parts. The oxygen handwheel should have a blue mark and the acetylene handwheel should have a red mark.
7.1.2 Each cutting nozzle should be marked with: manufacturer name or trademark, model and number. 7.1.3 The location of all signs should be obvious and the writing pattern should be clear. 7.2 Packaging
7.2.1 The small packaging should be beautiful and sturdy, and should be marked with the product name, model and manufacturer name. The large package should be sturdy, comply with transportation requirements and relevant regulations, and be marked with product name, model, quantity, gross weight, net weight, volume, year of manufacture, factory name and standard number, with correct font and clear handwriting. 7.2.2 Use small paper for the cutting nozzle Box or plastic bag (box) packaging. When the cutting nozzle is supplied separately, each carton or plastic (box) can only contain one model of cutting nozzle, and the product name, model, nozzle number, quantity, trademark or broad name should be marked. Large packaging should comply with the relevant provisions of Article 7.2.1 of this standard. Additional notes:
This standard is proposed and managed by the Harbin Welding Research Institute of the Ministry of Machinery Industry. This standard was drafted by Harbin Welding Research Institute. The main drafters of this standard are Lu Zhenjie, Wang Run, Wang Shuqi and Zhang Jianwei. From the date of implementation of this standard, the original GB5110-85 Injection and Suction Cutting Torch shall be the standard. 574
6. The cooperation between the cutting nozzle and the cutting nozzle joint, and the cooperation between the hose joint and the rear connector should ensure airtightness and interchangeability. All gas passage parts must be degreased before assembly. 5.72
5.85
The thread should comply with the relevant provisions of GB192, GB196 and GB197. 5.9 The threads of each sealing nut of the cutting torch should have an adjustment margin of 1 to 3 pitches. 5.10 The gas consumption of the cutting torch is specified by the manufacturer in the instruction manual. 5.11
The appearance of the cutting moment should be beautiful and clean, without obvious mechanical damage, bending irregularity and surface defects. 5.12 When the nozzle is supplied alone, its performance shall comply with the relevant provisions of Article 3.4.1, Chapter 4, Article 5.1, Articles 5.3~5.7 and Article 5.11 of this standard.
6 Test methods and acceptance rules
6.1 Test methods
6.1.1 Air tightness test: The cutting torch does not contain The grease gas lasts 20 seconds in the water with the air valve closed and open. No air leakage is allowed in each air valve and all connections. 6.1.2 Combustion test: Under the oxygen working pressure specified in this standard, conduct a combustion test when the acetylene pressure is 0.006~0.008MPa, and check whether the cutting oxygen flow length and fire melt performance comply with Article 5.1, Table 7 and Article 5.3 of this standard. provisions. 6.1.3 Stability test in wind
Ignite the cutting torch equipped with No. 2 cutting nozzle (No. 3 cutting nozzle for G01-300 type), adjust it to a neutral flame according to the rated flow rate, and after stabilizing for 30 seconds, use The flame is perpendicular to the wind direction and placed at a wind speed of 10m/s. If the flame core of the cutting torch can burn normally within 10 seconds, it is qualified. If the flame core jumps, extinguishes or tempers, the test is allowed to be repeated twice, and the flame core can Those who burn normally are still qualified. 6.1.4 Anti-tempering test
The test device is shown in Figure 6.
572
Copper test plate
JB/T6970—93
Guide flame
Dry rotation center
Figure 6 Tempering test device
Note: 1-511+4f2+2031=1.25+1.75d2342=0.50+0.75d2. 6.1.4.1 Test conditions
The G01-100 cutting torch No. 2 cutting tip is used for the test. The end face of the cutting nozzle is parallel to the surface of the grooved copper plate. The distance between the cutting torch and the copper plate is 1.5mm, the rotation speed of the copper plate is 10r/min, and the test radius r is 165mm. 6.1.4.2 Procedure
After ignition, adjust to the standard neutral flame. After 30 seconds, place the cutting torch on top of the rotating copper plate. During the test, the flame is not allowed to be adjusted. The fire is extinguished while rotating, and re-ignition is allowed. . 6.1.4.3 Evaluation
If the copper plate rotates 5 times without continuous tempering, the test is qualified. If continuous tempering occurs, stop the test immediately, cool and clean the cutting torch (nozzle), and then repeat the second test (cooling after each test). If continuous tempering does not occur, it is still qualified. 6.2 Acceptance rules
6.2.1 Appearance quality shall comply with the provisions of Article 5.11 of this standard. 6.2.2 Factory products must have product certificates and instructions for use. 6.2.3 The user has the right to inspect the delivered products according to the test methods and acceptance rules specified in this standard. 6.2.4 Appearance, air tightness test, combustion test, wind stability test, tempering resistance test and inspection of the dimensions of interchangeable parts and connection parts specified in Article 3.4 of this standard, the random inspection quantity can be according to JB/GQ ·Carry out the sampling method specified in F9003. 573 | | tt | | JB/T6970—93 | If there are still unqualified items after re-inspection, no matter how many, the batch of products will be regarded as unqualified and must be repaired and resubmitted for acceptance. 7 Marks and Packaging
7.1 Marks
7.1.1 The cutting torch should be marked with: manufacturer name, trademark, model, year of manufacture and oxygen and acetylene inlet parts. The oxygen handwheel should have a blue mark and the acetylene handwheel should have a red mark.
7.1.2 Each cutting nozzle should be marked with: manufacturer name or trademark, model and number. 7.1.3 The location of all signs should be obvious and the writing pattern should be clear. 7.2 Packaging
7.2.1 The small packaging should be beautiful and sturdy, and should be marked with the product name, model and manufacturer name. The large package should be sturdy, comply with transportation requirements and relevant regulations, and be marked with product name, model, quantity, gross weight, net weight, volume, year of manufacture, factory name and standard number, with correct font and clear handwriting. 7.2.2 Use small paper for the cutting nozzle Box or plastic bag (box) packaging. When the cutting nozzle is supplied separately, each carton or plastic (box) can only contain one model of cutting nozzle, and the product name, model, nozzle number, quantity, trademark or broad name should be marked. Large packaging should comply with the relevant provisions of Article 7.2.1 of this standard. Additional notes:
This standard is proposed and managed by the Harbin Welding Research Institute of the Ministry of Machinery Industry. This standard was drafted by Harbin Welding Research Institute. The main drafters of this standard are Lu Zhenjie, Wang Run, Wang Shuqi and Zhang Jianwei. From the date of implementation of this standard, the original GB5110-85 Injection and Suction Cutting Torch shall be the standard. 574
6. The cooperation between the cutting nozzle and the cutting nozzle joint, and the cooperation between the hose joint and the rear connector should ensure airtightness and interchangeability. All gas passage parts must be degreased before assembly. 5.72
5.85
The thread should comply with the relevant provisions of GB192, GB196 and GB197. 5.9 The threads of each sealing nut of the cutting torch should have an adjustment margin of 1 to 3 pitches. 5.10 The gas consumption of the cutting torch is specified by the manufacturer in the instruction manual. 5.11
The appearance of the cutting moment should be beautiful and clean, without obvious mechanical damage, bending irregularity and surface defects. 5.12 When the nozzle is supplied alone, its performance shall comply with the relevant provisions of Article 3.4.1, Chapter 4, Article 5.1, Articles 5.3~5.7 and Article 5.11 of this standard.
6 Test methods and acceptance rules
6.1 Test methods
6.1.1 Air tightness test: The cutting torch does not contain The grease gas lasts 20 seconds in the water with the air valve closed and open. No air leakage is allowed in each air valve and all connections. 6.1.2 Combustion test: Under the oxygen working pressure specified in this standard, conduct a combustion test when the acetylene pressure is 0.006~0.008MPa, and check whether the cutting oxygen flow length and fire melt performance comply with Article 5.1, Table 7 and Article 5.3 of this standard. provisions. 6.1.3 Stability test in wind
Ignite the cutting torch equipped with No. 2 cutting nozzle (No. 3 cutting nozzle for G01-300 type), adjust it to a neutral flame according to the rated flow rate, and after stabilizing for 30 seconds, use The flame is perpendicular to the wind direction and placed at a wind speed of 10m/s. If the flame core of the cutting torch can burn normally within 10 seconds, it is qualified. If the flame core jumps, extinguishes or tempers, the test is allowed to be repeated twice, and the flame core can Those who burn normally are still qualified. 6.1.4 Anti-tempering test
The test device is shown in Figure 6.
572
Copper test plate
JB/T6970—93
Guide flame
Dry rotation center
Figure 6 Tempering test device
Note: 1-511+4f2+2031=1.25+1.75d2342=0.50+0.75d2. 6.1.4.1 Test conditions
The G01-100 cutting torch No. 2 cutting tip is used for the test. The end face of the cutting nozzle is parallel to the surface of the grooved copper plate. The distance between the cutting torch and the copper plate is 1.5mm, the rotation speed of the copper plate is 10r/min, and the test radius r is 165mm. 6.1.4.2 Procedure
After ignition, adjust to the standard neutral flame. After 30 seconds, place the cutting torch on top of the rotating copper plate. During the test, the flame is not allowed to be adjusted. The fire is extinguished while rotating, and re-ignition is allowed. . 6.1.4.3 Evaluation
If the copper plate rotates 5 times without continuous tempering, the test is qualified. If continuous tempering occurs, stop the test immediately, cool and clean the cutting torch (nozzle), and then repeat the second test (cooling after each test). If continuous tempering does not occur, it is still qualified. 6.2 Acceptance rules
6.2.1 Appearance quality shall comply with the provisions of Article 5.11 of this standard. 6.2.2 Factory products must have product certificates and instructions for use. 6.2.3 The user has the right to inspect the delivered products according to the test methods and acceptance rules specified in this standard. 6.2.4 Appearance, air tightness test, combustion test, wind stability test, tempering resistance test and inspection of the dimensions of interchangeable parts and connection parts specified in Article 3.4 of this standard, the random inspection quantity can be according to JB/GQ ·Carry out the sampling method specified in F9003. 573 | | tt | | JB/T6970—93 | If there are still unqualified items after re-inspection, no matter how many, the batch of products will be regarded as unqualified and must be repaired and resubmitted for acceptance. 7 Marks and Packaging
7.1 Marks
7.1.1 The cutting torch should be marked with: manufacturer name, trademark, model, year of manufacture and oxygen and acetylene inlet parts. The oxygen handwheel should have a blue mark and the acetylene handwheel should have a red mark.
7.1.2 Each cutting nozzle should be marked with: manufacturer name or trademark, model and number. 7.1.3 The location of all signs should be obvious and the writing pattern should be clear. 7.2 Packaging
7.2.1 The small packaging should be beautiful and sturdy, and should be marked with the product name, model and manufacturer name. The large package should be sturdy, comply with transportation requirements and relevant regulations, and be marked with product name, model, quantity, gross weight, net weight, volume, year of manufacture, factory name and standard number, with correct font and clear handwriting. 7.2.2 Use small paper for the cutting nozzle Box or plastic bag (box) packaging. When the cutting nozzle is supplied separately, each carton or plastic (box) can only contain one model of cutting nozzle, and the product name, model, nozzle number, quantity, trademark or broad name should be marked. Large packaging should comply with the relevant provisions of Article 7.2.1 of this standard. Additional notes:
This standard is proposed and managed by the Harbin Welding Research Institute of the Ministry of Machinery Industry. This standard was drafted by Harbin Welding Research Institute. The main drafters of this standard are Lu Zhenjie, Wang Run, Wang Shuqi and Zhang Jianwei. From the date of implementation of this standard, the original GB5110-85 Injection and Suction Cutting Torch shall be the standard. 574
5. During the random inspection, if there are unqualified items, the unqualified items for sampling and re-inspection should be added. When all the re-inspections are qualified, only the unqualified items in the initial inspection will be returned to the whole. If there are still unqualified items after the re-inspection, regardless of If the amount exceeds the limit, the batch of products will be deemed to be unqualified and must be re-submitted for acceptance after modification. 7 Marks and Packaging
7.1 Marks
7.1.1 The cutting torch should be marked with: manufacturer name, trademark, model, year of manufacture and oxygen and acetylene inlet parts. The oxygen handwheel should have a blue mark and the acetylene handwheel should have a red mark.
7.1.2 Each cutting nozzle should be marked with: manufacturer name or trademark, model and number. 7.1.3 The location of all signs should be obvious and the writing pattern should be clear. 7.2 Packaging
7.2.1 The small packaging should be beautiful and sturdy, and should be marked with the product name, model and manufacturer name. The large package should be sturdy, comply with transportation requirements and relevant regulations, and be marked with product name, model, quantity, gross weight, net weight, volume, year of manufacture, factory name and standard number, with correct font and clear handwriting. 7.2.2 Use small paper for the cutting nozzle Box or plastic bag (box) packaging. When the cutting nozzle is supplied separately, each carton or plastic (box) can only contain one model of cutting nozzle, and the product name, model, nozzle number, quantity, trademark or broad name should be marked. Large packaging should comply with the relevant provisions of Article 7.2.1 of this standard. Additional notes:
This standard is proposed and managed by the Harbin Welding Research Institute of the Ministry of Machinery Industry. This standard was drafted by Harbin Welding Research Institute. The main drafters of this standard are Lu Zhenjie, Wang Run, Wang Shuqi and Zhang Jianwei. From the date of implementation of this standard, the original GB5110-85 Injection and Suction Cutting Torch shall be the standard. 574
5. During the random inspection, if there are unqualified items, the unqualified items for sampling and re-inspection should be added. When all the re-inspections are qualified, only the unqualified items in the initial inspection will be returned to the whole. If there are still unqualified items after the re-inspection, regardless of If the amount exceeds the limit, the batch of products will be deemed to be unqualified and must be re-submitted for acceptance after modification. 7 Marks and Packaging
7.1 Marks
7.1.1 The cutting torch should be marked with: manufacturer name, trademark, model, year of manufacture and oxygen and acetylene inlet parts. The oxygen handwheel should have a blue mark and the acetylene handwheel should have a red mark.
7.1.2 Each cutting nozzle should be marked with: manufacturer name or trademark, model and number. 7.1.3 The location of all signs should be obvious and the writing pattern should be clear. 7.2 Packaging
7.2.1 The small packaging should be beautiful and sturdy, and should be marked with the product name, model and manufacturer name. The large package should be sturdy, comply with transportation requirements and relevant regulations, and be marked with product name, model, quantity, gross weight, net weight, volume, year of manufacture, factory name and standard number, with correct font and clear handwriting. 7.2.2 Use small paper for the cutting nozzle Box or plastic bag (box) packaging. When the cutting nozzle is supplied separately, each carton or plastic (box) can only contain one model of cutting nozzle, and the product name, model, nozzle number, quantity, trademark or broad name should be marked. Large packaging should comply with the relevant provisions of Article 7.2.1 of this standard. Additional notes:
This standard is proposed and managed by the Harbin Welding Research Institute of the Ministry of Machinery Industry. This standard was drafted by Harbin Welding Research Institute. The main drafters of this standard are Lu Zhenjie, Wang Run, Wang Shuqi and Zhang Jianwei. From the date of implementation of this standard, the original GB5110-85 Injection and Suction Cutting Torch shall be the standard. 574
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