JB/T 7239-1994 Reticulated valve plates for reciprocating piston compressors
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Machinery Industry Standard of the People's Republic of China
JB/T7239-1994
Network Valve Plate for Reciprocating Piston Compressor
Published on 1994-07-18
Ministry of Machinery Industry of the People's Republic of China
Implementation on 1995-07-01
Machinery Industry Standard of the People's Republic of China
Network Valve Plate for Reciprocating Piston Compressor
1 Subject Content and Scope of Application
JB/T 72391994
This standard specifies the classification, technical requirements, inspection and acceptance rules, marking, packaging and storage requirements of network valve plates for reciprocating piston compressors.
This standard applies to network valve plates (hereinafter referred to as valve plates) used for network gas valves of reciprocating piston compressors. Reference standards
GB1801
GB2828
GB3280
GB11254
3 Product classification
Tolerance and fit Dimensions to 500mm Hole, shaft tolerance zone and fit Batch inspection Count sampling procedure and sampling table (applicable to continuous batch inspection) Stainless steel cold-rolled steel plate
Hot-rolled thin steel plate for compressor valve plate
Valve plate type shall be in accordance with the provisions of Table 1.
Type code
Structural type
Valve plate with guide inner hole
Valve plate with single-port elastic arm in the middle without guide inner hole Valve plate with double-port elastic arm in the middle without guide inner hole The marking method of the valve plate code shall be in accordance with the following provisions. 3.2
Valve disc thickness, mm
Valve disc inner diameter da, mm
Valve disc outer diameter, D, mm
Structural diagram and dimensions
Appendix A
Appendix B
Valve disc each ring groove width b, mm
Valve disc type code
3.3 Marking example
b=4mm, D=150mm, d=34mm, 8=1 .5mm valve disc with guide inner hole should be marked as: WA4150×34×1.5JB/T7239-94
Approved by the Ministry of Machinery Industry on July 18, 1994
Implementation on July 1, 1995
Technical requirements
JB/T7239-1994
Valve discs should comply with the requirements of this standard and be manufactured according to the drawings and technical documents approved by the prescribed procedures. 4.2
Material for valve discs shall comply with the provisions of Table 2. Other materials that can ensure the design requirements may be substituted. Table 2
30CrMnSiA
50CrVA
The thickness difference of the same valve disc shall comply with the provisions of Table 3. Valve plate thickness
≤100
>100~150
Standard code
GB11254
GB3280
>150~200
The flatness tolerance of the valve plate shall conform to the provisions of Table 4. Table 4
Valve plate thickness
>50~100
>100~150
>200~250
Standard name
Hot-rolled thin steel plate for compressor valve plate
Stainless steel cold-rolled steel plate
>250~300
>150~200
>200~250
>250~300
>300~350
>300~350
The surface hardness of the valve plate is 37~45HRC, the hardness difference on the same valve plate shall not be greater than 3HRC, and the main body of the metallographic structure is tempered calcite.
The surface roughness R of the two planes of the valve disc is 0.4, the surface roughness R of the outer cylindrical surface and the surface roughness R of the inner hole of the WA type valve disc is 3.2.0.8,
The surface of the valve disc should not have cracks, cuts, scratches, rust, hardness tester indentations and other defects that affect fatigue strength. After the valve disc is finely ground, the grinding stress should be eliminated. The valve disc should not have residual magnetism.
After the valve disc is finally treated to eliminate internal stress, it shall not be leveled by hammering. The burrs of the valve disc ring groove and inner hole should be removed; the outer circle edge should be blunt, and the fillet radius R≥0.2mm. Under the normal working conditions of the compressor and the gas valve, the valve disc replacement period should not be less than the provisions of Table 5. The valve disc thickness tolerance is ±0.05mm.
The inner hole tolerance of the WA type valve disc is H9 as specified in GB1801. The inner hole tolerance of the WB type valve disc is 1°mm. The outer circle tolerance of the valve plate shall be in accordance with d10 specified in 31801.
JB/T72391994
Power compressor
Compressor
Process compressor (except special media) Medium and high pressure vehicle mounted air-cooled compressor
5Test methods and inspection rules
1.6~≤10
1.6~≤10
WA type valve plate
5.1 The material of the valve plate shall be accompanied by the quality certificate of the steel plant when entering the warehouse. If there is no quality certificate, relevant tests shall be supplemented. Period
WB type valve plate
5.2 The geometrical dimension tolerance and appearance quality of the valve plate shall be accepted by the quality inspection department according to this standard, product drawings and technical documents before it can leave the factory.
5.3 The metallographic structure and hardness inspection of the valve plate shall be carried out in batches. The valve discs of the same batch and the same material are grouped into one batch, and no less than three pieces are sampled for each batch.
During the inspection, first take one piece for metallographic structure and hardness inspection. If one item does not meet the requirements, double inspection shall be carried out. If there is still one piece that does not meet the requirements, the batch of valve discs shall be unqualified. 5.4 The flatness of the valve disc shall be inspected on the flat plate with a round head feeler gauge 0.01mm larger than the allowable value. The one that cannot be inserted is qualified. The inspection position does not include the part within the middle elastic arm.
5.5 If the cracks of the valve disc need to be inspected by special flaw detection methods, it shall be decided by negotiation between the supply and demand parties. 5.6 When the ordering unit accepts the product quality, it shall be carried out in accordance with the provisions of GB2828. The sampling plan and the quality inspection level AQL value shall be decided by negotiation between the supply and demand parties.
Packaging, marking and storage
The surface of the valve disc shall be coated with rust-proof agent and packaged with stainless water and non-corrosive packaging materials. After packaging, the valve plate should be stored in a dry and non-corrosive gas warehouse, and the anti-rust period should be no less than one year. The packaged valve plate should be accompanied by a product certificate. The product certificate should include the following: a.
Factory name and address;
Product mark and name;
Quantity;
Manufacturing date;
Inspection department seal;
Production batch number and manufacturer's mark.
JB/T 7239—1994
Appendix A
Structural diagram and dimensions of WA type valve plate
(Supplement)
The structural diagram and dimensions of WA type valve plate should comply with the provisions of Figure A1, Figure A2 and Table A1. When the dimension D of the first annular groove of the valve plate of Figure A1 structure is >90mm, the number of connecting ribs of the annular groove is increased to eight. When the size D of the nth annular groove of the valve disc of the structure of Figure A1>210mm, the number of connecting ribs of the annular groove increases to 12. When the size D of the nth annular groove of the valve disc of the structure of Figure A2>165mm, the number of connecting ribs of the annular groove increases to 12. D
WA type valve disc
JB/T72391994
Figure A2WA type valve disc
WA3-□×17×
WA3-□×20×
WA3-□×25×
WA3-口X26×口*
WA3.5×26×
WA3.5-×26×
WA4-×30×port*
WA4×34×
WA4-portX40×port*
WA4×20×||tt ||WA4-X24X
WA5-□×30×
WA5-□×36×□*
WA5-X42×*
WA5-□×46×
WA5-×50×*
WA6×42×
WA6-×52×port*
WA6-X60X
JB/T 7239—1994
Location pin matching
with valve plate
diameter a
position e
connecting rib
width e|| tt||Number n
84/102
94/112
88/103
93/108
98/113
103/118
104/122
114/132
124/142
Note: ① The actual outer diameter of the valve plate is 1~2mm larger than the nominal outer diameter. It should comply with the actual outer diameter D of the valve plate specified in this table. ② The tolerance of the position dimension c of the locating pin installed on the valve seat or lift limiter is ±0.15mm. ③ The ones with "*" are preferred.
④ The diameter of the valve plate locating pin hole is dimension a Tolerance is in mm. Table
Nominal diameter of each ring
92/104
96/108
102/114
108/123||tt ||113/128
118/133
123/138
128/143
134/152
14 4/162
154/172
94/105
100/111
105/117
112/124
116/ 128
122/134
102/114
106/118
133/148
138/153
143/158| |tt||148/163
153/168
164/182
174/192
184/202
(inner diameter/outer diameter)
132/144
136/148||tt| |142/154
126/138
158/173
163/178
168/183
173/188
178 /193
194/212
204/222||t t||214/232
152/164
156/168
162/174
146/158
183/198||tt| |188/203
193/208
198/213
203/218
224/242
234/252
244 /262
172/184
176/188
182/194
166/178
208/223
213/228
218/233
223/238|| tt||228/243
254/272
264/282
274/292
186/198
284/302||tt| |294/312
304/322
JB/T 72391994
Min piece actual outer diameter
45, 61
50, 66, 82
55, 71, 87
90, 107||tt ||76, 95, 113
81, 100, 119
126,
146, 166,
150170,
130, ||t t||136,
156,
176, 196
76,96,116
80, 100, 120,
140,160,180,200
100, 125, 150,
175, 200, 225
105,130,155,
180, 205, 23 0
110,135,160,185,
210,235
115,140,165,
190,215,
120,145,170,||tt ||195,220,245
154,184,214,
244,274,304
164,194, 224，
254，284，314
174，204，234，
264，294，324
JB/T72391994
Appendix B|| tt||Structural diagram and dimensions of WB type valve disc
(Supplementary part)
WB type valve disc is divided into two structures, WBI type and WBⅡ type. The design and selection are determined according to specific requirements. WBI The structural diagram and dimensions of WBⅡ valve discs shall comply with the requirements of Figure B1, Figure B2, Figure B3 and Table B1 respectively. When the dimension D of the first ring groove of the valve disc of Figure B1 structure is greater than 90mm, the ring The number of connecting ribs of the groove increases to 8. When the dimension D of the nth annular groove of the valve plate of the structure of Figure B1 is greater than 210 mm, the number of connecting ribs of the annular groove increases to 12. When the size D of the nth ring groove of the valve plate of the structure of Figure B2 is >160mm, the number of connecting ribs of the ring groove is increased to 12, and the size of the elastic arm after grinding is 0, which can be selected according to the specific situation. The selected values are specified as 0.5, 0.8, and 1.0 mm. Special circumstances may be specified separately.
Elastic arm
WBI valve piece
Elastic bone
JB/T7239-1994
WBI valve piece
Elastic kidney| |tt||Figure B3WBⅡ type valve plate middle part structure D
Valve plate code
WB3□×8×
WB3-×10×
WB3-× 13×
WB3-×14×口*
WB3.5-×13×
WB3.5口x13×口*
WB4-口×16×口*
WB4-×16×
WB4-×18×*
WB4-口×18×
WB5×20×||tt ||WB5-口×20×口*
WB5-×26×口*www.bzxz.net
WB5-口×26×口
WB5-口×26×口*||tt ||WB6-口x32×
WB6-×32×口*
WB6-×32×
Pressing circle
Inner diameter and outer diameter
JB/T 7239—1994
Elastic ring
Inner diameter/outer diameter
Location pin matching the reading piece
Connecting rib
Note: ① The actual outer diameter of the valve piece The diameter is 1~2mm larger than the nominal outer diameter and should conform to the actual outer diameter of the valve plate specified in this table D②WB4-口×18×口The positioning pin size in brackets is used for valve plates with an outer diameter of D≤136mm. The tolerance of the position dimension c of the positioning pin installed on the wide seat or lift limiter is ±0.15mm. Those with "*" are preferred.
5 The structures in Figure B3 can be selected according to specific requirements (i.e. Any WB-type reading film can be used). ③ R, and R, in Figure B1, Figure B2, and Figure B3 are a/2 plus mm, a/2 plus mm, respectively. ① f in Figure B3 =armm，e=a,+(1-2)mm. 10
368/83
873/88
84/102
94/112
98/113
103/118| |tt||104/122
114/132
124/142
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