CN202209458U - Diaphragm type minimum pressure valve - Google Patents
Diaphragm type minimum pressure valve Download PDFInfo
- Publication number
- CN202209458U CN202209458U CN2011203599717U CN201120359971U CN202209458U CN 202209458 U CN202209458 U CN 202209458U CN 2011203599717 U CN2011203599717 U CN 2011203599717U CN 201120359971 U CN201120359971 U CN 201120359971U CN 202209458 U CN202209458 U CN 202209458U
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- pressure
- valve
- guide cylinder
- guide rod
- diaphragm
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Abstract
The utility model discloses a diaphragm type minimum pressure valve, which comprises a valve seat, wherein a guide cylinder is matched and arranged on the valve seat, a guide bar is arranged in the guide cylinder, a valve plug which is in sealing contact with the inner wall of the valve seat is arranged on the guide bar, an inner cavity of the valve seat is divided into an air inlet passage and an air outlet passage by the valve plug, a valve cover is arranged on the guide cylinder, a reset spring used for pressing the guide bar down is arranged in the valve cover, a pressure diaphragm is arranged between the guide cylinder and the valve cover and used for separating the guide cylinder from the valve cover in a sealing manner, the guide bar is connected to the pressure diaphragm, a middle passage is arranged on the guide cylinder, and the air outlet passage is communicated with the lower surface of the pressure diaphragm through the middle passage. The traditional piston type structure is replaced with the pressure diaphragm type structure, thus the diaphragm type minimum pressure valve does not need lubricating oil for lubrication, and can be better suitable for an oil-free compressor, and has the advantages of greatly simplified structure and smaller volume in comparison with those of the traditional piston type structure.
Description
Technical field
The utility model relates to the minimum pressure valve technical field of air compressor, is a kind of diaphragm type minimum pressure valve that is applicable to oilless compressor specifically.
Background technique
At present, in existing air compressor product, minimum pressure valve is a valve body the most frequently used in the hydrojet cooling compressor, and its effect is to set up required pressure in the moving compressor assembly.But existing minimum pressure valve all is the piston type minimum pressure valve basically; Be similar to Chinese utility model patent ZL03140225.9 and model utility ZL200420095311.2; They are mainly reflected in piston is that cooperation through O type circle plays sealing; During this time, this O type circle need use lubricating grease to be lubricated.For this reason, for the no oils compressor in the compressor product, this minimum pressure valve that has lubricating grease is just incompatible to be used; Owing to there is lubricating grease, lubricating grease can contact with gas, is easy to pollute pressurized gas; Simultaneously, because water content is bigger in the air, also impel lubricated the acceleration to lose efficacy.Therefore, existing piston type minimum pressure valve is inapplicable on no oils compressor product.
Summary of the invention
The purpose of the utility model is to overcome the deficiency of existing technology, and a kind of no oils compressor, simple in structure, diaphragm type minimum pressure valve that volume is light and handy of being applicable to is provided.
The goal of the invention of the utility model is achieved in that a kind of diaphragm type minimum pressure valve, and it comprises valve seat, and matching on the valve seat is equipped with guide cylinder; Guide rod is installed in the guide cylinder; The spool that contacts with the inner wall sealing of valve seat is installed on the guide rod, and spool is divided into gas-entered passageway and outlet passageway with the inner chamber of valve seat, and guide cylinder is provided with valve gap; The Returnning spring that guide rod is pressed down is installed in the valve gap; It is characterized in that: the pressure-sensitive diaphragm that is provided with between said guide cylinder and the valve gap, pressure-sensitive diaphragm is separated guide cylinder and valve bonnet seal, and said guide rod is connected on the pressure-sensitive diaphragm; Have center-aisle on the guide cylinder, center-aisle is communicated with the lower surface of outlet passageway and pressure-sensitive diaphragm.
Further; For more firm pressure-sensitive diaphragm is installed on the guide rod; Said guide rod is provided with and is used for guide rod is connected the press mold piece on the pressure-sensitive diaphragm, and the underpart of Returnning spring is crimped on the press mold piece, and pressure-sensitive diaphragm is arranged between press mold piece and the guide rod; Simultaneously, this press mold piece is also used as spring seat.
Among a kind of embodiment wherein of the utility model, said press mold piece is connected on the guide rod through tight fixed bolt.
There is relative movement between above-mentioned guide cylinder and the guide rod,, can between said guide cylinder and guide rod, be provided with antifriction slide block in order to reduce friction.
Among other a kind of embodiment of the utility model, when the press mold piece does not need tight fixed bolt locking and when freely being placed on the pressure-sensitive diaphragm, the inwall of said valve gap is provided with the guiding step that matches with the press mold piece.
The inner chamber of above-mentioned valve gap is equipped with the stage clip piece that is crimped on the Returnning spring upper end portion, and valve gap is provided with the adjusting screw rod of roof pressure on the stage clip piece.
Load when transferring unloading in that compressor is normal, spool need move down and reset, so leaves air flue between the axle of spool and the guide rod, fills so that the space of spool after moving obtains gas rapidly, makes spool move flexibly.
Further optimization as technique scheme; Have the back pressure blowing mouth on the said valve seat on the wall body of gas-entered passageway; Have the back pressure suction port of connecting valve cover cavity on the wall body of valve gap, said back pressure blowing mouth and back pressure suction port link together through gas pipeline, and reduction valve is installed on the gas pipeline; Gas pipeline is communicated with the inner chamber of gas-entered passageway and valve gap, and the inner chamber of valve gap becomes the back pressure cavity that pressure reduction is arranged with gas-entered passageway.
And the inner chamber of above-mentioned valve gap is provided with the spacing concave station of upward pressure that is used to prevent press mold piece transition rising, avoids the too much pressurized of pressure-sensitive diaphragm to move, and then the stroke of confining pressure diaphragm.
Further, be provided with seal ring between the inwall of said guide cylinder and valve seat.
Further, the lower seal that the inwall with valve seat matches is installed on the said spool.
The utility model is compared with the grease lubrication piston type minimum pressure valve of existing technology, has the following advantages:
The pressure-sensitive diaphragm that the utility model is provided with between guide cylinder and valve gap; Pressure-sensitive diaphragm is separated guide cylinder and valve bonnet seal, and said guide rod is connected on the pressure-sensitive diaphragm, has center-aisle on the guide cylinder; Center-aisle is communicated with the lower surface of outlet passageway and pressure-sensitive diaphragm; The utility model is isolated valve internal pressure and external atmosphere pressure through pressure-sensitive diaphragm, and when the lower surface of pressure-sensitive diaphragm received enough big upwards atmospheric pressure, pressure-sensitive diaphragm moved up; Thereby make and move on the valve body that whole valve body is in the manual labour state; And the upwards atmospheric pressure that receives when the lower surface of pressure-sensitive diaphragm is during less than the pressure of Returnning spring, and returning spring driving pressure diaphragm moves down, and finally makes valve body press the inwall of valve seat, and whole valve body is in closed condition.This minimum pressure valve only need pass through the pressure-sensitive diaphragm structure, has replaced the conventional piston type structure, and integral product need not grease lubrication; Can be useful on the oilless compressor product preferably; And its structure is greatly simplified than the conventional piston type structure, and volume is lighter and handier.
Description of drawings
Accompanying drawing 2 is the A bilge construction enlarged view of Fig. 1.
Accompanying drawing 3 is the B bilge construction enlarged view of Fig. 1.
Accompanying drawing 5 is the utility model embodiment 2 a structural representation, and the minimum pressure valve shown in this figure is in closed condition.
Accompanying drawing 6 is the C bilge construction enlarged view of Fig. 5.
Accompanying drawing 7 is the utility model embodiment 3 a structural representation, and the minimum pressure valve shown in this figure is in closed condition.
Accompanying drawing 8 is the D bilge construction enlarged view of Fig. 7.
Embodiment
Below in conjunction with accompanying drawing the utility model is done further to describe.
Embodiment 1:
According to Fig. 1, Fig. 2 and shown in Figure 3, it is the most preferred embodiment of the utility model, this diaphragm type minimum pressure valve; It comprises valve seat 1, matches on the valve seat 1 guide cylinder 2 is installed, and guide cylinder 2 sockets are installed in the inner chamber of valve seat 1; Prepare in the process at actual product; For the tightness between the inwall that guarantees guide cylinder 2 and valve seat 1, generally all between the inwall of guide cylinder 2 and valve seat 1, be provided with seal ring 23, seal ring 23 is generally O type circle on this.Guide rod 3 is installed in the guide cylinder 2, and guide rod 3 is generally spar structure and hermetic is inlaid in the inner chamber of guide cylinder 2.The spool 4 that contacts with the inner wall sealing of valve seat 1 is installed on the guide rod 3; Spool 4 is installed in the lower end of guide rod 3 for the inverted T shape structure embeds, the lower seal 24 that the inwall with valve seat 1 matches is installed, in view of the above on the said spool 4; Spool 4 is divided into gas-entered passageway 5 and outlet passageway 6 with the inner chamber of valve seat 1; During compressor operating, gas-entered passageway 5 connects deaerator, and outlet passageway 6 discharges air-flow.Guide cylinder 2 is provided with valve gap 7, and the Returnning spring 8 that guide rod 3 is pressed down is installed in the valve gap 7, and after guide rod 3 was by air inlet air pressure jack-up, Returnning spring 8 applied the elastic force that resets downwards to guide rod 3, resets downwards to impel guide rod 3.And the utility model improves to original minimum pressure valve, the pressure-sensitive diaphragm 9 that between guide cylinder 2 and valve gap 7, is provided with, and pressure-sensitive diaphragm 9 is with guide cylinder 2 and valve gap 7 sealed separation.Guide rod 3 is connected on the pressure-sensitive diaphragm 9, has center-aisle 10 on the guide cylinder 2, and center-aisle 10 is communicated with the lower surface of outlet passageway 6 and pressure-sensitive diaphragm 9; In a single day this pressure-sensitive diaphragm 9 receives the upward pressure of gas-entered passageway 5, and 9 of pressure-sensitive diaphragms can move up, and then makes guide rod 3 also move up thereupon; Spool 4 is upwards by jack-up; Whole valve body is opened, and the air-flow of gas-entered passageway 5 is from outlet passageway 6 outputs, shown in accompanying drawing 4.
Further; For more firm pressure-sensitive diaphragm 9 is installed on the guide rod 3, said guide rod 3 is provided with and is used for guide rod 3 is connected the press mold piece 11 on the pressure-sensitive diaphragm 9, and the underpart of Returnning spring 8 is crimped on the press mold piece 11; Pressure-sensitive diaphragm 9 is arranged between press mold piece 11 and the guide rod 3; Said press mold piece 11 is connected on the guide rod 3 through tight fixed bolt 12, and the inner chamber of valve gap 7 is equipped with the stage clip piece 13 that is crimped on Returnning spring 8 upper end portions; Valve gap 7 is provided with the adjusting screw rod 14 of roof pressure on stage clip piece 13; When product used, people can pass through adjusting screw rod 14 with the height and position of adjustment stage clip piece 13 at valve gap 7 inner chambers, and then realized regulating the pressure of 8 pairs of guide rods 3 of Returnning spring.In concrete preparation process, also can be provided with locking nut 25 on the adjusting screw rod 14, with the adjusted position of further secured adjusted screw rod 14.
The utility model loads when transferring unloading in that compressor is normal, and spool 4 need move down and reset, so leaves air flue 15 between the axle of spool 4 and the guide rod 3, fills so that the space of spool 4 after moving obtains gas rapidly, makes spool 4 mobile flexibly
Further optimization as technique scheme; Have back pressure blowing mouth 16 on the wall body of gas-entered passageway 5 on the said valve seat 1, have the back pressure suction port 17 that is communicated with valve gap 7 inner chambers on the wall body of valve gap 7, said back pressure blowing mouth 16 links together through gas pipeline 18 with back pressure suction port 17; Gas pipeline 18 is communicated with the inner chamber of gas-entered passageway 5 and valve gap 7; The inner chamber of valve gap 7 becomes back pressure cavity, and, reduction valve 19 also is installed on the gas pipeline 18.Introduce pressure through reduction valve 19 above pressure-sensitive diaphragm 9 from the gas-entered passageway 5 of minimum pressure valve; Need sealing simultaneously between adjusting screw rod 14 and the valve gap 7; Can make the utility model become back pressure diaphragm type minimum pressure valve; Can adjust the back pressure of pressure-sensitive diaphragm 9 through the pressure of adjustment reduction valve 19; Can be implemented in the pressure of opening of adjustment back pressure diaphragm type minimum pressure valve in the certain limit like this, so that back pressure diaphragm type minimum pressure valve under same valve, adapts to and opens pressure and adjust on a large scale; So that being fit to the compressor of different exhaust pressure, uses back pressure diaphragm type minimum pressure valve, as long as the exhaust pressure of compressor is no more than the design pressure of back pressure diaphragm type minimum pressure valve.Introduce the back pressure of pressure-sensitive diaphragm 9 simultaneously, the pressure reduction on the two sides of pressure-sensitive diaphragm 9 is reduced, so that the minimizing of the strength of pressure-sensitive diaphragm 9, thereby the life-span of pressure-sensitive diaphragm 9 is improved greatly, moreover the active force of Returnning spring 8 can be done seldom.Thisly control back pressure through introducing reduction valve 19 modes; Can be used for the piston type minimum pressure valve equally, so that the spring force of piston type minimum pressure valve seldom, valve can be accomplished the very high pressure of opening; Making minimum pressure valve be fit to mesohigh type compressor uses; The method is superior to original back pressure type balance minimum pressure valve because the area of back pressure cavity the area with piston is the same big or approaching fully, make simple in structure like this; Spring chamber has enough spaces to deposit simultaneously; Be easy to can change through the pressure that changes spring force or back pressure the pressure of opening of valve simultaneously, its flexibility is very strong, so the utility model provides perfect solution to solving diaphragm type minimum pressure valve or high pressure type minimum pressure valve or obtaining long-life minimum pressure valve.Introduce back pressures as if using through reduction valve 19, can remove the adjusting screw rod 14 on the Returnning spring 8, the size of regulating reduction valve 19 and Regulation spring power can be regulated the pressure of opening of minimum pressure valve.
The utility model moves for fear of the too much pressurized of pressure-sensitive diaphragm; The stroke of constraint diaphragm; The inner chamber of above-mentioned valve gap 7 is provided with the spacing concave station 22 of upward pressure that is used to prevent press mold piece 11 transition rising, receives the transition pressed home spring 8 of excessive pressure in order to prevent guide rod 3.
Embodiment 2:
Referring to Fig. 5 and shown in Figure 6, the overall structure of present embodiment and embodiment's 1 basically identical, slightly different is:
Present embodiment is considered between guide cylinder 2 and the guide rod 3 and is had relative movement, in order to reduce friction, between guide cylinder 2 and guide rod 3, is provided with antifriction slide block 20, makes that the slippage of guide rod 3 in guide cylinder 2 can be more smooth and easy.
Embodiment 3:
Referring to Fig. 7 and shown in Figure 8, the overall structure of present embodiment and enforcement 1 basically identical, slightly different is:
Present embodiment has omitted tight fixed bolt 12, and press mold piece 11 need not to be connected on the guide rod 3 through tight fixed bolt 12.This press mold piece 12 freely is placed on the pressure-sensitive diaphragm 9, but for this structure, in order to prevent 12 skews of press mold piece, present embodiment is provided with the guiding step 21 that matches with press mold piece 11 at the inwall of valve gap 7.
In sum; The utility model is isolated valve internal pressure and external atmosphere pressure through pressure-sensitive diaphragm 9; When the lower surface of pressure-sensitive diaphragm 9 received enough big upwards atmospheric pressure, pressure-sensitive diaphragm 9 moved up, under the air-flow effect of gas-entered passageway 5; Move on spool 4 and the guide rod 3, whole valve body is in the manual labour state; And the upwards atmospheric pressure that receives when the lower surface of pressure-sensitive diaphragm 9 is during less than the pressure of Returnning spring 8, and returning spring driving pressure diaphragm 9 moves down, and finally makes spool 4 press the inwall of valve seat 1, and whole valve body is in closed condition.This minimum pressure valve only need pass through pressure-sensitive diaphragm 9 structures, has replaced the conventional piston type structure, and integral product need not grease lubrication; Can be useful on the oilless compressor product preferably; And its structure is greatly simplified than the conventional piston type structure, and volume is lighter and handier.And; In preferred process; The utility model also can manufacture back pressure diaphragm type minimum pressure valve, and product flexibility is very strong, so the utility model provides perfect solution to solving diaphragm type minimum pressure valve or high pressure type minimum pressure valve or obtaining long-life minimum pressure valve.The utility model can also obtain multiple different effect through more little change, like the structure of pressure-sensitive diaphragm 9, only saying among the figure that drawing is that the centre is a cone structure, obtains the life-span preferably in order to make, and can increase arcuate structure etc.; As increasing abrasion-proof ring etc. between press mold piece 11 and the valve gap 7; The lower seal 24 of spool 4 bottoms can be pressed from both sides dull and stereotyped gasket structure etc. instead for another example.
Claims (10)
1. diaphragm type minimum pressure valve; It comprises valve seat (1); Matching on the valve seat (1) is equipped with guide cylinder (2), and guide rod (3) is installed in the guide cylinder (2), and the spool (4) that contacts with the inner wall sealing of valve seat (1) is installed on the guide rod (3); Spool (4) is divided into gas-entered passageway (5) and outlet passageway (6) with the inner chamber of valve seat (1); Guide cylinder (2) is provided with valve gap (7), and the Returnning spring (8) that guide rod (3) is pressed down is installed in the valve gap (7), it is characterized in that: the pressure-sensitive diaphragm (9) that is provided with between said guide cylinder (2) and the valve gap (7); Pressure-sensitive diaphragm (9) is with guide cylinder (2) and valve gap (7) sealed separation; Said guide rod (3) is connected on the pressure-sensitive diaphragm (9), has center-aisle (10) on the guide cylinder (2), and center-aisle (10) is communicated with the lower surface of outlet passageway (6) and pressure-sensitive diaphragm (9).
2. diaphragm type minimum pressure valve according to claim 1; It is characterized in that: said guide rod (3) is provided with and is used for guide rod (3) is connected the press mold piece (11) on the pressure-sensitive diaphragm (9); The underpart of Returnning spring (8) is crimped on the press mold piece (11), and pressure-sensitive diaphragm (9) is arranged between press mold piece (11) and the guide rod (3).
3. diaphragm type minimum pressure valve according to claim 2 is characterized in that: said press mold piece (11) is connected on the guide rod (3) through tight fixed bolt (12).
4. diaphragm type minimum pressure valve according to claim 2 is characterized in that: be provided with antifriction slide block (20) between said guide cylinder (2) and the guide rod (3).
5. diaphragm type minimum pressure valve according to claim 2 is characterized in that: the inwall of said valve gap (7) is provided with the guiding step (21) that matches with press mold piece (11).
6. diaphragm type minimum pressure valve according to claim 2; It is characterized in that: the inner chamber of said valve gap (7) is equipped with the stage clip piece (13) that is crimped on Returnning spring (8) upper end portion, and valve gap (7) is provided with the adjusting screw rod (14) of roof pressure on stage clip piece (13).
7. diaphragm type minimum pressure valve according to claim 2 is characterized in that: leave air flue (15) between said spool (4) and the guide rod (3).
8. diaphragm type minimum pressure valve according to claim 7; It is characterized in that: have back pressure blowing mouth (16) on the wall body of the last gas-entered passageway (5) of said valve seat (1); Have the back pressure suction port (17) that is communicated with valve gap (7) inner chamber on the wall body of valve gap (7); Said back pressure blowing mouth (16) and back pressure suction port (17) link together through gas pipeline (18); Reduction valve (19) is installed on the gas pipeline (18), and gas pipeline (18) is communicated with the inner chamber of gas-entered passageway (5) and valve gap (7), and the inner chamber of valve gap (7) becomes back pressure cavity.
9. diaphragm type minimum pressure valve according to claim 1 is characterized in that: the inner chamber of said valve gap (7) is provided with the upward pressure spacing concave station (22) that is used to prevent press mold piece (11) transition rising.
10. diaphragm type minimum pressure valve according to claim 1; It is characterized in that: be provided with seal ring (23) between the inwall of said guide cylinder (2) and valve seat (1), the lower seal (24) that the inwall with valve seat (1) matches is installed on the said spool (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203599717U CN202209458U (en) | 2011-09-23 | 2011-09-23 | Diaphragm type minimum pressure valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203599717U CN202209458U (en) | 2011-09-23 | 2011-09-23 | Diaphragm type minimum pressure valve |
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| Publication Number | Publication Date |
|---|---|
| CN202209458U true CN202209458U (en) | 2012-05-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203599717U Expired - Fee Related CN202209458U (en) | 2011-09-23 | 2011-09-23 | Diaphragm type minimum pressure valve |
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| CN (1) | CN202209458U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102434692A (en) * | 2011-09-23 | 2012-05-02 | 广东正力精密机械有限公司 | Partial back pressure balance membrane sheet type minimum pressure valve |
| CN103047460A (en) * | 2012-12-20 | 2013-04-17 | 浙江元曜阀业有限公司 | Combined dome pressure regulating valve |
| CN103244720A (en) * | 2013-05-03 | 2013-08-14 | 扬中市阀门厂有限公司 | Relief valve |
| CN103899807A (en) * | 2014-04-22 | 2014-07-02 | 安徽铜都流体科技股份有限公司 | Low-maintenance type pressure relief/holding valve with spring arranged externally |
| CN104019257A (en) * | 2014-06-05 | 2014-09-03 | 中国科学院等离子体物理研究所 | Novel vacuum decompression valve |
| CN104132166A (en) * | 2014-07-31 | 2014-11-05 | 山东国舜压力容器有限公司 | Pressure regulator |
| CN112096940A (en) * | 2020-08-28 | 2020-12-18 | 中油国家油气钻井装备工程技术研究中心有限公司 | Reset type slurry open flow device for drilling pump |
-
2011
- 2011-09-23 CN CN2011203599717U patent/CN202209458U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102434692A (en) * | 2011-09-23 | 2012-05-02 | 广东正力精密机械有限公司 | Partial back pressure balance membrane sheet type minimum pressure valve |
| CN102434692B (en) * | 2011-09-23 | 2013-10-23 | 广东正力精密机械有限公司 | Partial back pressure balance membrane sheet type minimum pressure valve |
| CN103047460A (en) * | 2012-12-20 | 2013-04-17 | 浙江元曜阀业有限公司 | Combined dome pressure regulating valve |
| CN103244720A (en) * | 2013-05-03 | 2013-08-14 | 扬中市阀门厂有限公司 | Relief valve |
| CN103899807A (en) * | 2014-04-22 | 2014-07-02 | 安徽铜都流体科技股份有限公司 | Low-maintenance type pressure relief/holding valve with spring arranged externally |
| CN104019257A (en) * | 2014-06-05 | 2014-09-03 | 中国科学院等离子体物理研究所 | Novel vacuum decompression valve |
| CN104132166A (en) * | 2014-07-31 | 2014-11-05 | 山东国舜压力容器有限公司 | Pressure regulator |
| CN104132166B (en) * | 2014-07-31 | 2016-04-27 | 山东国舜压力容器有限公司 | Pressure regulator |
| CN112096940A (en) * | 2020-08-28 | 2020-12-18 | 中油国家油气钻井装备工程技术研究中心有限公司 | Reset type slurry open flow device for drilling pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120502 Termination date: 20140923 |
|
| EXPY | Termination of patent right or utility model |