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Engineering Construction Standard Full Text Information System
ICS91.110
Construction Industry Standard of the People's Republic of China JG/T113—1999
Concrete Hollow Slab Extrusion Machine
Extruder of Concrete Hollow Slab Construction Standard
1999-11-05 Issued
2000-06-01 Implementation
Released by the Ministry of Construction of the People's Republic of China
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JG/T113—1999
On the basis of extensive collection and research on the technical data of concrete hollow slab extrusion molding in Europe and the United States, this paper summarizes JG/T103105-1999 "Classification, Technical Conditions and Test Methods of Prestressed Concrete Hollow Slab Extrusion Machine" (i.e. ZBP95001.1～95001.3-89D in Based on the specific implementation situation in the past six years and the requirements of relevant national standards and specifications, the above two standards will be merged and revised into this standard.
There are two types of extruders, external vibration type and internal vibration type. At present, the technical parameters of the internal vibration type still need to be verified and are not specified in this standard for the time being. The main revisions to this standard are: the "prestressed" restriction in the name has been cancelled; the quality grade regulations have been cancelled, and the requirements for some key parts have been improved. Appendix A of this standard is a prompt appendix.
This standard will replace JG/T103~105-1999 from the date of implementation. This standard was proposed by the Standard Quota of the Ministry of Construction. This standard was issued by the Mechanical Equipment and Vehicle Standards and Technology Department of the Ministry of Construction. It is under the jurisdiction of Beijing Construction Machinery Comprehensive Research Institute.
The drafting units of this standard are: Jiangsu Academy of Building Science, China Academy of Building Science Building Mechanization Branch, Nuclear Industry 210 Factory Sichuan Leshan City Construction Machinery Factory Henan Liaoyuan Group Company, Hebei Dongguang First Machinery Factory. The main drafters of this standard are: Zhang Qingguang, Fu Liugen, Qu Huaming, Zhang Shize, Dong Baoqing, Yan Gaoming.
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Construction Industry Standard of the People's Republic of China Concrete Hollow Slab Extrusion Forming Machine
Extruder of concrete etehollowslab Scope
JG/T113—1999
Replaces JG/T103~105—1999
This standard specifies the classification, technical requirements, test methods, inspection rules, marking, packaging and storage of concrete hollow slab extrusion forming machines (hereinafter referred to as extruders). This standard applies to various types of extruders for producing concrete hollow slabs. For various types of forming equipment for producing concrete columns, beams, beams, blocks and wall panels by extrusion and vibration methods, reference can be made to the implementation
Cited standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are all valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB14040—1993 Prestressed concrete hollow slab JG/T5011.4—1992
G/T5011.5—1992
G/T5011.81992
Construction machinery and equipment
Technical conditions
Construction machinery and equipment
Technical conditions
Construction machinery and equipment
JG/T5011.10—1992
Construction machinery and equipment
Technical conditions
1999-11-05 approved by the Ministry of Construction of the People's Republic of China Engineering Construction Standard Full Text Information System| |tt||General technical conditions for grey cast iron parts
General technical conditions for ductile iron parts
General technical conditions for forgings
General technical conditions for cutting parts
2000-06-01 implementation
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JG/T5012—1992
General technical conditions for packaging of construction machinery and equipment JG/T5082.1—1996 General technical conditions for welded parts of construction machinery and equipment 3 Classification
3.1 Model
The model of the extruder consists of group, type, characteristics, main parameters and updated variant code. Explanation is as follows:
Update variant code: According to Chinese phonetic letters (large main parameter code: (hollow plate height X mark height) × 10:
Characteristic code: single block type without marking
S-double block type
N-internal vibration type
Group code: extruder
3.2 Specification series
3.2.1 The main parameters of the extruder are represented by the height of the hollow plate and the mark width. The main parameter series is shown in Table 1.
Table 1 Main parameter series
Hollow plate height
Mark width
The basic parameters of the external vibration extruder are shown in Table 2. Construction Standard Full-text Information System
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Main parameter code
Transmission power
Vibration power
Forming speed | |tt||Marking example
12×50
Basic parameters of external vibration extruder
12×60
12×90
12×120
18×60
18×90
18×120
a) The height of the hollow plate is 120mm, the marking width is 600mm, and the external vibration double-block extruder:||t t||Concrete hollow slab extrusion molding machine JWS12X60JG/T113b) The height of the hollow slab is 180mm, the width of the mark is 900mm, the extruder with external vibration single block, the second modification:
Concrete hollow slab extrusion molding machine, JW18X90BG/T113 Technical requirements
General requirements
4.1.1 The extruder shall be manufactured according to the drawings and technical documents approved by the prescribed procedures. 4.1.2 Under the conditions of ambient temperature of 5℃～40℃ and power supply voltage of (380±20)V, the extruder shall be able to produce continuously and normally on a pedestal that meets the relevant regulations. 4.1.3 The electronic control device shall be safe and reliable, and shall have good vibration isolation, fire prevention, rain prevention and dust prevention measures. The electrical components in the box shall be arranged neatly and the wiring shall be clear. 4.1.4
The transmission mechanism must be well lubricated, flexible in operation, and no abnormal sound during operation. Gray iron castings shall comply with the provisions of JG/T5011.4; ductile iron castings shall comply with the provisions of JG/T5011.5, forgings shall comply with the provisions of JG/T5011.8; machined parts shall comply with the provisions of JG/T5011.10, and welded parts shall comply with the provisions of JG/T5082.1. 4.1.6 The exposed surface of machined parts shall be treated with rust prevention. 4.1.7 The raw materials, standard parts and matching parts used shall comply with the relevant standards. 3
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4.1.8 Product labels shall be clearly written, firmly installed and straight, and shall not have defects such as scratches, paint peeling, and hammer marks.
4.1.9 The paint layer of the machine body shall be firm and uniform in color, without obvious defects such as flow marks, peeling, wrinkling, and adhering impurities.
4.2 Performance requirements
4.2.1 The quality and performance of the hollow plate produced by the extruder shall comply with the relevant provisions of GB14040.
4.2.2 Within the 200h operation time, the average trouble-free working time of the extruder shall not be less than 120h, and the reliability shall not be less than 85%.
4.2.3 The noise at the driver's ear of the extruder shall comply with the provisions of Table 3. When the noise is greater than 90-dB(A), the operator shall be equipped with corresponding protective equipment. Table 3 Noise
Vibration frequency
≥45~75
>75~125
≥125
<105
When the extruder is working, the amplitude of the vibration bottom plate shall be symmetrical on both sides parallel to the center axis of the frame, and the amplitude deviation rate shall not be greater than 25%. 4.2.5 The vibration source and the frame shall be isolated from vibration. When the extruder is working, the amplitude of the forced vibration of the frame should not be greater than 0.25A (A is the average amplitude of each vibration measuring point on the vibration bottom plate). 4.2.6 The extruder should be able to restart normally after stopping for 10 minutes during operation. 4.2.1
The working life of the screw feeder should not be less than 6000m, that is, after the screw feeder is installed and used, it is worn to the point that the extruder molding speed is not less than 0.70m/min, and qualified hollow plates can still be produced. The total length of the hollow plates produced). 4.2.8 The vibrator should be able to meet the requirements of 3 production cycles, and each production cycle should be continuous operation for no less than 1 hour and then stop for 0.3 hours.
4.2.9 When the reducer runs for 1 hour under rated load, the temperature rise of the lubricating oil shall not exceed 40°C. 4.2.10 The oil-immersed lubrication and hydraulic components should not leak oil. There should be no more than three oil seepage points4
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The insulation resistance of the electrical system to the whole machine should not be less than 0.5MQ. 4.2.12 The gap between the vibrating bottom plate and the adjacent parts around it should not be greater than 3mm. 4.2.13 The radial runout tolerance of the tail end of the screw feeder is 4mm. 4.2.14 The screw feeder group and the side template should be assembled symmetrically, and the symmetry tolerance is 3mm.
5 Test method
Test conditions
5.1.1 Test conditions
a) The test should be carried out continuously;
b) The concrete strength grade of the hollow slab produced by the prototype machine is C30, and the raw materials of the concrete should comply with the provisions of GB14040.
5.1.2 The ambient temperature during the test is 5℃～40℃; the power supply voltage is (380±20)V. 5.1.3
The test results are recorded in the table of Appendix A (Suggested Appendix). Determination of quality and performance of concrete hollow slabs
The test items and methods shall be carried out in accordance with the provisions of GB14040. Determination of forming speed
5.3.1 Test instruments and tools:
a) Stopwatch;
b) Steel tape measure.
5.3.2 Use a stopwatch to record the length of the hollow slab produced continuously within 30 minutes and calculate the molding speed of the prototype.
Reliability test
Failure classification
Product failures are divided into four categories: mild, general, serious and fatal failures based on factors such as personal safety, degree of damage to parts, degree of functional degradation and difficulty of repair. See Table 4. 5
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Failure categoryFailure name
Fatal failure
Table 4 Failure classification
Failure characteristics
Failure examples
Serious endangerment or Causing personal injury or death, burning of important motors, frame failure, serious damage to the assembly or main components, causing us major economic losses, seriously affecting the product function, and the machine must be stopped for repair. Serious faults require replacement of external important parts or dismantling of reducer gears. The machine body needs to be opened to replace internal parts. The repair time is long (more than 4 hours), and the maintenance cost is high. It obviously affects the main performance of the product. Serious leakage, weld opening, general faults must be stopped for inspection and repair. Generally, only external parts need to be replaced or repaired. Electrical switches are burned out. Random tools can be used. Umbilical pressure spiral is damaged. Repair in a short time (about 1.5 hours), the cost is medium, and the product is slightly affected. Function, no need to stop the machine, more minor oil leakage, loose bolts
Minor fault replacement or repair parts, use random tools to move, overcurrent protector
(QD) to eliminate faults in a short time (about 20min), low cost
Mean trouble-free working time and reliability
)Mean trouble-free working time (MTBF) see formula (1): MTBF=
Criticality coefficient e
Where: $——Accumulated working time of the machine (excluding the prescribed maintenance time), h; T
-The equivalent number of failures that occur within the prescribed reliability test time, see formula (2):
Where n——The number of times the i-th type of fault occurs; e
-The criticality coefficient of the i-th type of fault.
000000000
When \<1, set 了=1, but the number of minor faults should be stated in the test report;
b) Reliability (R) see formula (3):
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R=t/(t+t)X100%
-The total time to repair the fault (excluding the prescribed maintenance time), h. In the formula: t-
5.5 Vibration parameter determination
5.5.1 Test items
a) Amplitude and amplitude deviation rate of the vibration base plate; b) Amplitude of the frame.
5.5.2 Test instrument
Amplitude measuring instrument.
5.5.3 Test requirements
a) Conduct the test under the test conditions;
b) The number of test points each time shall be an even number and shall be arranged symmetrically based on the longitudinal centerline of the fuselage; c) After the vibrator is started, the test record shall be made during the stable working stage. 5.5.4 Measurement point arrangement
a) 46 measurement points shall be symmetrically and evenly distributed on the vibration bottom plate at a distance of 10 mm from the edge; 6 points shall be taken on the racks on both sides of the side template outlet.
The calculation of the amplitude deviation rate is shown in formula (4) and (5), and the maximum value in the result is the amplitude deviation rate of the prototype.
In the formula: F, F2
1Am=4l×100%
-Amplitude deviation rate:
A,——the average amplitude of each group of measuring points, mm; Amex
-the maximum amplitude of each group of measuring points, mm; the minimum amplitude of each group of measuring points, mm. 5.6 Noise measurement
5.6.1 Test instruments and tools
a) Sound level meter ("A" weighted network sound pressure level); b) Steel tape measure.
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**** (5)
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5.6.2 Test requirements
The test site is centered on the prototype. There should be no large reflectors within a radius of 25m, and the background noise must be 10dB (A) lower than the prototype noise. 5.6.3 Test method
Place the sound level meter 1m in front, back, left and right of the prototype, and measure four points 1.5m above the ground.
5.7 Determination of insulation resistance
5.7.1 Test instrument
500V megohmmeter
5.7.2 Test method
a) Test before prototype operation
b) Stop the machine for test after producing more than 30m of hollow slab under test conditions. 5.8 Determination of shutdown and restart capability
5.8.1 Test instrument
Test method
After the machine is in normal production for 10min, stop it for 10min and then restart it. 5.9
Determination of the working temperature rise of the reducer lubricating oil
5.9.1 Test tools
Point thermometer
5.9.2 Test method
Measure the temperature rise of the lubricating oil in the reducer b) After the prototype has worked for 1 hour, stop it and measure the temperature of the lubricating oil in the reducer. 5.10 Determination and observation of oil seepage and leakage of reducer and hydraulic system: For oil-immersed lubrication system, if more than one drop leaks out every 10 minutes, it is oil leakage; if it does not exceed one drop, but oil can be felt by hand, it is oil seepage; for hydraulic system, if more than one drop leaks out every 3 minutes, it is oil leakage; if it does not exceed one drop, but oil can be felt by hand, it is oil seepage. 5.11 Determination of the gap between the vibration base plate
5.11.1 Test tools
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5.11.2 Test method
Before the prototype is operated, use a feeler gauge to check the gap between the vibration base plate and the surrounding adjacent parts. 5.12 Determination of the radial circular runout of the screw feeder5.12.1 Test instrument
a) Dial indicator;
b) Magnetic table base.
5.12.2 Test method
The prototype is placed horizontally on the maintenance frame, and the transmission device is manually rotated to make the screw feeder rotate more than one circle. At the same time, the circular runout of the tail of the screw feeder is measured with a dial indicator. 5.13 Determination of symmetry of screw feeder assembly and side template 5.13.1 Test tools
a) Steel ruler,
b) Internal caliper.
5.13.2 Test method
Measure the distance between the outer circle of the shaft neck and the outer circle of the tail end of the outer screw feeder and the adjacent side template, and then subtract the data measured at the corresponding position on the other side using the same method, and take the larger absolute value as the measurement result. 6 Inspection rules
6.1 Factory inspection
6.1.1 Before leaving the factory, the product must be inspected by the factory quality inspection department one by one, and the product certificate will be issued after confirmation of compliance.
For factory inspection items, see Table 6.
Those that are qualified in all key items and four general items are qualified are qualified products. 6.2 Type inspection
6.2.1 Type inspection shall be conducted in any of the following cases: a) Trial design and evaluation of new products or old products for transfer to factory production; b) After formal production, if there are major changes in design, process, and materials, which may affect product performance; c) When the product is discontinued for more than two years and production is resumed, d) There is a significant difference between the factory inspection results and the last type test results; e) The national quality supervision agency proposes a type inspection requirement. See Table 6 for type inspection items.
Table 6 Inspection items
Serial number classification Technical requirements
Inspection itemsbzxz.net
Forming speed
Hollow slab quality
Mean trouble-free working time and reliability
Amplitude deviation rate
Working life of screw feeder
Insulation resistance of electrical system
Gap around vibration base
Radial runout of screw feeder after assembly Symmetry of screw feeder and side template assembly Electronic control device||tt ||Operational performance of transmission mechanism
Quality of casting, forging, welding and processed parts
Exposed surface of processed parts
Quality of raw materials and purchased parts
Paint quality
Continuous working capacity of vibrator
Vibration isolation effect
Temperature rise of reducer lubricating oil
Oil leakage
Restarting capacity
Sampling and judgment rules are as follows:
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Factory inspection type inspection
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