CN204677814U - A kind of selection atmospheric valve - Google Patents
A kind of selection atmospheric valve Download PDFInfo
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- CN204677814U CN204677814U CN201420863604.4U CN201420863604U CN204677814U CN 204677814 U CN204677814 U CN 204677814U CN 201420863604 U CN201420863604 U CN 201420863604U CN 204677814 U CN204677814 U CN 204677814U
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- atmospheric valve
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Abstract
The utility model discloses a kind of selection atmospheric valve, comprise valve body and spool, described valve body is provided with upper chamber and lower chambers, the end face of upper and lower chamber offers respectively differently from Compressor Group interiorly presses first, second suction port connected, suction port sidewall is provided with internal thread, through by passage between upper and lower chamber, offer relief opening in the middle part of valve channel; First air input joint, is connected with upper chamber by screw thread; Second air input joint, is connected with lower chambers by screw thread; Described spool comprises the guide rod be located at correspondence in lower valve body cavity respectively and covered first piston on valve channel mouth and the second piston and be connected first piston and the second piston through valve channel, and first piston is moved up and down by guide rod and the second piston synchronous.Optimization of inside structure improves, and spool adopts double piston design, achieves and selects the function that low pressure is connected, high pressure disconnects, to adapt to the needs of Special Screws formula compressor.
Description
Technical field
The utility model relates to a kind of atmospheric valve, relates more specifically to a kind of for the selection atmospheric valve in screw compressor pneumatic control system.
Background technique
In prior art, the common function for the selection atmospheric valve (i.e. shuttle valve) in screw compressor pneumatic control system is as follows: select atmospheric valve to offer three interfaces, wherein two is suction port (A mouth and B mouth), another is relief opening (OUT mouth), when the gas in Compressor Group with different air pressure is communicated with two suction ports respectively, after suction port both sides air pressure compares, relatively anticyclonic suction port can be connected with relief opening, carry out pressure release emptying, hypobaric suction port then disconnects closedown.But, some Special Screws formula compressor adopts special pneumatic control system at present, special pneumatic control system is as follows to selecting the functional requirement of atmospheric valve: when the gas in unit with different air pressure is communicated with two suction ports respectively, after suction port both sides air pressure compares, require that relatively hypobaric suction port and relief opening are connected, carry out pressure release emptying, anticyclonic suction port then disconnects closedown.In order to meet above-mentioned requirements, the on-off state that most pneumatic control system then adopts two solenoid valves to control two suction ports respectively in conjunction with PLC program realizes, this kind of solution not only complex structure, and with high costs, is very unfavorable for industrialization development.
In view of this, be necessary very much to be improved for the selection atmospheric valve in screw compressor pneumatic control system for of the prior art, so design a kind of can low pressure is connected, high pressure disconnects selection atmospheric valve, be industry technical problem urgently to be resolved hurrily.
Model utility content
Technical problem to be solved in the utility model is to overcome above-mentioned the deficiencies in the prior art, there is provided a kind of and select atmospheric valve, its internal structure is improved to the function that required selection low pressure is connected, high pressure disconnects, to adapt to the needs of Special Screws formula compressor, simultaneously, Material selec-tion is optimized to critical piece, makes it steady in a long-term can run and have good Economy.
The technical scheme in the invention for solving the above technical problem is: a kind of selection atmospheric valve, comprise valve body and spool, described valve body is provided with upper chamber and lower chambers, the end face of upper and lower chamber offers respectively differently from Compressor Group interiorly presses first, second suction port connected, suction port sidewall is provided with internal thread, through by passage between upper and lower chamber, offer relief opening in the middle part of valve channel; First air input joint, is connected with upper chamber by screw thread; Second air input joint, is connected with lower chambers by screw thread; Described spool comprises the guide rod be located at correspondence in lower valve body cavity respectively and covered first piston on valve channel mouth and the second piston and be connected first piston and the second piston through valve channel, and first piston is moved up and down by guide rod and the second piston synchronous.
Described guide rod is the hollow stem of up/down perforation, and the upper end of first piston is provided with screw rod, the fixedly sleeved first piston of screw rod, guide rod and the second piston, and coordinates mounting nuts in the lower end of the second piston.
The upper end of described first piston and the lower end of the second piston are provided with the plain cushion coordinating screw rod, nut.
Described guide rod and screw rod adopt stainless steel material.
Be provided with outwardly directed bulge loop outside the upper end of described guide rod, the lower end surface of first piston offers draw-in groove, is provided with O RunddichtringO between described draw-in groove and bulge loop.
The lower end outside of described guide rod is provided with outwardly directed bulge loop, and the upper-end surface of the second piston offers draw-in groove, is provided with O RunddichtringO between described draw-in groove and bulge loop.
Described O RunddichtringO adopts polytetrafluoroethylmaterial material.
Described valve body adopts surface through the aluminum alloy material of anodizing.
Compared with prior art, the beneficial effects of the utility model: be mainly used in the special pneumatic control system of Special Screws formula compressor, structure is reliable and adopt and design without easily damaged parts, substantially non-maintaining in follow-up use.Optimization of inside structure improves, and spool adopts double piston design, achieves and selects the function that low pressure is connected, high pressure disconnects, substitute the control mode of two solenoid valves, simultaneously need not revise PLC program, namely simplify the design of pneumatic control system, cost-saving again and reduce unit regulation difficulty.
By to the improvement selecting atmospheric valve material, can steady in a long-termly run, valve body selects surface through the aluminum alloy material of anodizing, has good corrosion resistance and Economy; Guide rod and other accessories select stainless steel, have good intensity; All Sealings select teflon material, have good sealing, intensity and self lubricity.
Accompanying drawing explanation
Fig. 1 is internal structure schematic diagram of the present utility model.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the utility model is described further.
Refer to Fig. 1, the one that the utility model relates to selects atmospheric valve, comprise valve body 1 and spool, valve body 1 inside is provided with on two, under the chamber that is interconnected, upper chamber is upper active chamber, lower chambers is lower active chamber, passage between two active chambers is guiding gutter 2, the first suction port (A mouth) be connected with compressor is offered in the upper end of upper active chamber, the second suction port (B mouth) be also connected with compressor is offered in the lower end of lower active chamber, two suction ports are used for the gas connecting different air pressure in Compressor Group respectively, the relief opening (OUT mouth) of up/down perforation is offered in the middle part of the side of guiding gutter 2, relief opening is used for Exhaust Gas, first suction port, upper active chamber, guiding gutter 2 and relief opening constitute the first pressure release emptying path, second suction port, lower active chamber, guiding gutter 2 and relief opening constitute the second pressure release emptying path.Spool is positioned at the active chamber of valve body 1, serves as and selects the valve of atmospheric valve to select to open, close.When the first suction port air pressure is greater than the second suction port air pressure, the highpressure of the first suction port promotes spool pass and closes active chamber, the second pressure release emptying path is connected, lower active chamber pressure release emptying; Otherwise the highpressure of the second suction port promotes spool and closes lower active chamber, makes the first pressure release emptying path connect, upper active chamber pressure release emptying.Achieve with this and select the function that low pressure is connected, high pressure disconnects.
For the ease of installation, the maintenance of atmospheric valve, two suction port sidewalls of valve body 1 are provided with internal thread, and the first air input joint 9 is connected with upper chamber by screw thread, and meanwhile, the second air input joint 10 is connected with lower chambers by screw thread.
Spool comprises first piston 3, second piston 4 and connects the guide rod 5 of first piston 3 and the second piston 4, and guide rod 5 passes guiding gutter 2, and first piston 3 is synchronously moved up and down by guide rod 5 and the second piston 4.First piston 3 is arranged in active chamber, and lower end correspondence covers upper port place at guiding gutter 2, and side and the chamber wall of first piston 3 adopt Spielpassung, makes first piston 3 can free to-and-fro motion.Same, the second piston 4 is arranged in lower active chamber, and upper end correspondence covers the lower port place at guiding gutter 2, and side and the chamber wall of the second piston 4 adopt Spielpassung, makes the second piston 4 can free to-and-fro motion.Guide rod 5 is the hollow stem of up/down perforation, and the upper end of first piston 3 is provided with screw rod 6, the fixedly sleeved first piston 3 of screw rod 6, guide rod 5 and the second piston 4, and coordinates mounting nuts 7 in the lower end of the second piston 4, is connected and fixed spool with this.Generally for reinforcing to be threaded, be provided with in the lower end of the upper end of first piston 3 and the second piston 4 plain cushion 8 coordinating screw rod 6, nut 7.
Be provided with outwardly directed bulge loop outside the upper end of guide rod 5, the lower end surface of first piston 3 offers draw-in groove, is provided with O RunddichtringO 11 between described draw-in groove and bulge loop; Meanwhile, the lower end outside of guide rod 5 is provided with outwardly directed bulge loop, and the upper-end surface of the second piston 4 offers draw-in groove, is also provided with O RunddichtringO 11 between described draw-in groove and bulge loop.The object of mounting O-shaped seal ring prevents when pressure release emptying, and two active chambers are leaked gas by guiding gutter or hollow guide rod, cause seal failure.
In order to the operation enabling selection atmospheric valve steady in a long-term; Material selec-tion is optimized to critical piece; valve body 1 adopts surface through the aluminum alloy material manufacture of anodizing; advantage is: one is the oxide film that material surface forms one deck densification; prevent valve body to be corroded and cause oxidation deactivation; two is manufacture costs that entirety reduces atmospheric valve, economical and practical.Guide rod 5 and screw rod 6 adopt stainless steel material license, advantage is: one is that guide rod corrosion can not occur causes catching phenomenon because of producing condensed water during work, two is that stainless steel also has good rigidity and toughness, can bear that spool is upper and lower moves back and forth produced shearing force.All O RunddichtringOs adopt polytetrafluoroethylmaterial material manufacture, and this kind of material has good temperature tolerance, corrosion resistance and grease resistance, can ensure the work of spool long-time stable.
Working procedure of the present utility model, when the gas in compressor with different air pressure is communicated with two suction ports respectively, after suction port both sides air pressure compares, if the first suction port air pressure is greater than the second suction port air pressure, then the highpressure promotion first piston 3 of the first suction port drives the second piston 4 to move downward, until first piston 3 sealing cover is at the upper port place of guiding gutter 2, now disconnects the first pressure release emptying path, connect the second pressure release emptying path, lower active chamber carries out emptying; Otherwise then disconnect the second pressure release emptying path, connect the first pressure release emptying path, upper active chamber carries out emptying.
Above specific embodiment is only in order to illustrate structure of the present utility model, and those of ordinary skill in the art can make various deformation and change under design of the present utility model, and these distortion and change include within protection domain of the present utility model.
Claims (8)
1. a selection atmospheric valve, comprise valve body and spool, it is characterized in that, described valve body is provided with upper chamber and lower chambers, the end face of upper and lower chamber offers respectively differently from Compressor Group interiorly presses first, second suction port connected, suction port sidewall is provided with internal thread, through by passage between upper and lower chamber, offers relief opening in the middle part of valve channel; First air input joint, is connected with upper chamber by screw thread; Second air input joint, is connected with lower chambers by screw thread; Described spool comprises the guide rod be located at correspondence in lower valve body cavity respectively and covered first piston on valve channel mouth and the second piston and be connected first piston and the second piston through valve channel, and first piston is moved up and down by guide rod and the second piston synchronous.
2. selection atmospheric valve according to claim 1, it is characterized in that, described guide rod is the hollow stem of up/down perforation, and the upper end of first piston is provided with screw rod, the fixedly sleeved first piston of screw rod, guide rod and the second piston, and coordinate mounting nuts in the lower end of the second piston.
3. selection atmospheric valve according to claim 2, is characterized in that, the upper end of described first piston and the lower end of the second piston are provided with the plain cushion coordinating screw rod, nut.
4. selection atmospheric valve according to claim 2, is characterized in that, described guide rod and screw rod adopt stainless steel material.
5. selection atmospheric valve according to claim 1, is characterized in that, is provided with outwardly directed bulge loop outside the upper end of described guide rod, and the lower end surface of first piston offers draw-in groove, is provided with O RunddichtringO between described draw-in groove and bulge loop.
6. selection atmospheric valve according to claim 1, is characterized in that, the lower end outside of described guide rod is provided with outwardly directed bulge loop, and the upper-end surface of the second piston offers draw-in groove, is provided with O RunddichtringO between described draw-in groove and bulge loop.
7. the selection atmospheric valve according to claim 5 or 6, is characterized in that, described O RunddichtringO adopts polytetrafluoroethylmaterial material.
8. selection atmospheric valve according to claim 1 and 2, is characterized in that, described valve body adopts surface through the aluminum alloy material of anodizing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420863604.4U CN204677814U (en) | 2014-12-31 | 2014-12-31 | A kind of selection atmospheric valve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420863604.4U CN204677814U (en) | 2014-12-31 | 2014-12-31 | A kind of selection atmospheric valve |
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| Publication Number | Publication Date |
|---|---|
| CN204677814U true CN204677814U (en) | 2015-09-30 |
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| CN201420863604.4U Active CN204677814U (en) | 2014-12-31 | 2014-12-31 | A kind of selection atmospheric valve |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108071823A (en) * | 2018-02-02 | 2018-05-25 | 高志男 | Sliding-type valve and apply its tail gas heat-exchanger rig |
| WO2019054624A1 (en) * | 2017-09-15 | 2019-03-21 | 명화공업주식회사 | Fluid supply structure for actuator piston assembly |
| EP3620317A1 (en) * | 2018-09-07 | 2020-03-11 | AGCO International GmbH | Air treatment apparatus and valve mechanism |
| CN111425622A (en) * | 2020-04-10 | 2020-07-17 | 中国船舶重工集团公司第七0三研究所 | Shuttle valve for gas turbine |
| WO2021240303A1 (en) * | 2020-05-29 | 2021-12-02 | Omb Saleri S.P.A. | A valve for a fuel cell motor vehicle system |
-
2014
- 2014-12-31 CN CN201420863604.4U patent/CN204677814U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019054624A1 (en) * | 2017-09-15 | 2019-03-21 | 명화공업주식회사 | Fluid supply structure for actuator piston assembly |
| CN108071823A (en) * | 2018-02-02 | 2018-05-25 | 高志男 | Sliding-type valve and apply its tail gas heat-exchanger rig |
| EP3620317A1 (en) * | 2018-09-07 | 2020-03-11 | AGCO International GmbH | Air treatment apparatus and valve mechanism |
| CN111425622A (en) * | 2020-04-10 | 2020-07-17 | 中国船舶重工集团公司第七0三研究所 | Shuttle valve for gas turbine |
| WO2021240303A1 (en) * | 2020-05-29 | 2021-12-02 | Omb Saleri S.P.A. | A valve for a fuel cell motor vehicle system |
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