CN201810840U - Low-pressure regulating valve of small flow gas - Google Patents
Low-pressure regulating valve of small flow gas Download PDFInfo
- Publication number
- CN201810840U CN201810840U CN2010205258182U CN201020525818U CN201810840U CN 201810840 U CN201810840 U CN 201810840U CN 2010205258182 U CN2010205258182 U CN 2010205258182U CN 201020525818 U CN201020525818 U CN 201020525818U CN 201810840 U CN201810840 U CN 201810840U
- Authority
- CN
- China
- Prior art keywords
- piston
- gas
- cylinder block
- threaded
- cover
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 230000001105 regulatory effect Effects 0.000 title claims abstract description 32
- 210000004907 gland Anatomy 0.000 claims description 11
- 238000013022 venting Methods 0.000 abstract 2
- 239000007789 gas Substances 0.000 description 62
- 230000033001 locomotion Effects 0.000 description 5
- 238000007789 sealing Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- NINIDFKCEFEMDL-RNFDNDRNSA-N Sulfur-36 Chemical compound [36S] NINIDFKCEFEMDL-RNFDNDRNSA-N 0.000 description 1
- -1 and Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 235000015040 sparkling wine Nutrition 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Landscapes
- Safety Valves (AREA)
Abstract
The utility model provides a low-pressure regulating valve of small flow gas, comprising a cylinder block, a spiral connection sleeve which is spirally matched and connected to the cylinder block and a piston, wherein the cylinder block is internally equipped with a gas storage tank, the cylinder block is provided with a gas inlet and a venting interface, and the gas inlet and the venting interface are respectively communicated to the gas storage tank. The spiral connection sleeve is provided with a gas inlet interface which is used connecting to a gas storing device and a throttling gas inlet which is communicated to the gas inlet interface, the space between the throttling gas inlet of the spiral connection sleeve and the gas inlet of the cylinder block is formed with a position cavity which is connected to the gas inlets, respectively; the piston is arranged within the piston cavity, the piston is provided with a vent hole and a throttling hole, and the vent hole and the throttling hole are used for re-throttling gas which is infused into the piston cavity from the throttling gas inlet of the spiral connection sleeve and infusing the gas into the air inlet of the cylinder. The high pressure gas is infused from the gas inlet interface, and then the gas can be discharged after transferring from high pressure gas into low pressure gas by means of double throttling which is carried out by using the throttling gas inlet of the spiral connection sleeve and throttling of the piston.
Description
Technical field
The utility model relates to a kind of gas pressure modulating valve, and particularly a kind of low pressure modulating valve that is used to control small-flow gas is applicable to that gas output pressure is lower but needs accurately constant occasion, as aerated water machine, light sparkling wine machine etc.
Background technique
The low pressure modulating valve that is used for small-flow gas at present mostly repacks on existing big-flow high-pressure modulating valve basis, this device is when carrying out pressure control to small-flow gas, the defective that exists mainly contains: one, pressure controlled error is big, and superpressure danger takes place easily; Two, pressure is regulated difficulty and unstable; Three, volume is too big, can't be installed on the small-sized air cylinder to use.Therefore, a kind of pressure regulator valve that is exclusively used in small-flow gas is sought in related domain, overcomes above-mentioned problem.
Summary of the invention
The object of the invention is exactly that a kind of low pressure modulating valve that is exclusively used in the control small-flow gas will be provided.
Technological scheme of the present invention provides a kind of low pressure modulating valve that is used for small-flow gas, comprise cylinder block, with cylinder block be threaded cover and the piston that connect of screw-thread fit mutually, has air storing cavity in the cylinder block, cylinder block is provided with inlet hole and the interface of giving vent to anger, the inlet hole and the interface of giving vent to anger are communicated to air storing cavity respectively, and the interface of giving vent to anger of cylinder block is used for the end of being bullied that connection need provide low-pressure gas.The tackling that is threaded is useful on the intake interface that is connected with gas storage equipment, the throttling inlet hole that is connected with intake interface, between the inlet hole of throttling inlet hole and the cylinder block of the cover that is threaded, be formed with the piston cavity that is connected with both respectively, piston is arranged in the piston cavity of main body, piston is provided with vent and throttle orifice, is used for the throttling and export to the inlet hole of cylinder block again of gas that the throttling inlet hole with the cover that is threaded certainly enters piston cavity.Pressurized gas enter from intake interface, through the throttling inlet hole of cover and the double throttling of the throttle orifice on the piston of being threaded, export after can changing pressurized gas into low-pressure gas, and, gas pressure is remained on the expected value by the mobile adjusting of piston in piston cavity.
Further, in cylinder block be threaded and between the cover pressure regulating spring can be set, this pressure regulating spring is used for providing an active force to piston, makes piston have the trend that the inlet hole towards cylinder block moves.When the gas in the air storing cavity of cylinder block acts on pressure on the piston and acts on pressure on the piston greater than pressure regulating spring, the throttling inlet hole that piston just can put towards being threaded moves, make charge flow rate reduce gradually, thereby the air pressure in the reduction air storing cavity, piston stop motion when pressure balance; Otherwise when pressure regulating spring acted on pressure on the piston and acts on pressure on the piston greater than the gas in the air storing cavity of cylinder block, piston then can move towards the inlet hole of cylinder block, piston stop motion when pressure balance.In fact, also can control by alternate manner the output pressure of cylinder block, design etc. as structure piston cavity, and it is fairly simple to utilize pressure regulating spring that the pressure of piston is used for mode that the gas pressure in the air storing cavity of cylinder block is controlled, and can also regulate the compression degree of pressure regulating spring by the be threaded mode of cover of relative cylinder block rotation, thereby available mode simple to operation is controlled required delivery pressure.
Further, piston comprises big piston and small piston, and the diameter of big piston is greater than the diameter of small piston, and piston cavity correspondingly comprises big piston chamber and small piston chamber, and big piston is arranged in the big piston chamber, and small piston is arranged in the small piston chamber.Pressure regulating spring is enclosed within on the small piston, and this pressure regulating spring provides a pressure to big piston.
Further, the big piston chamber can be arranged in the cylinder block.
Further, the small piston chamber can be arranged in the cover that is threaded.
Again further, be threaded the cover on spring groove can be set, pressure regulating spring is embedded in this spring groove, so that pressure regulating spring is located.
Preferably, the adjoining end of the throttling inlet hole with the cover that is threaded of piston can be provided with plug, between cover and the plug one section space that is used to enter air-flow is arranged in be threaded relative with this plug.This section space is used for cushioning the gas that transfers to piston cavity from the throttling inlet hole of the cover that is threaded, and the space size in this intersegmental crack then can be regulated the flow of air inlet.
Preferably, the vent on the piston can be along the radially extension of piston, and vent radially is communicated to piston cavity, and then along the axial connection of piston, axial throttle orifice is connected with vent the throttle orifice on the piston.
Further, have relief valve connection that is communicated with air storing cavity and the relief hole that is used to discharge gas that is connected with this relief valve connection on the cylinder block, in this relief valve connection, safety valve is installed, is used for the gas circuit between air storing cavity and the relief hole is cut off or opened.If the gas pressure in the malfunctioning air storing cavity that causes cylinder block of the adjusting of piston is excessive in use, safety valve just can be opened, and makes relief hole that the gas in the air storing cavity is discharged, with the danger of avoiding superpressure to export.
Further, safety valve comprises spool, be enclosed within on the described spool and to spool provide active force spring, be fixed on the gland in the relief valve connection, spool passes gland and is inserted in movably in the relief valve connection, spring is arranged between spool and the gland.When active force that the gas pressure in the air storing cavity of cylinder block provides to spool greater than spring, spool will move and safety valve is opened automatically.
The present invention compared with prior art, has following advantage: make pressurized gas change low-pressure gas into by multiple throttling, and can be used for controlling the gas pressure of output by the Flow-rate adjustment of piston, it is simple in structure, use is reliable, is applicable to the delivery pressure control of small-flow gas.
Description of drawings
Accompanying drawing 1 is the structural representation according to a kind of gas pressure modulating valve of the utility model enforcement;
Wherein: 1, the cover that is threaded; 10, outside thread; 11, small piston chamber; 12, first thimble; 13, throttling inlet hole; 14, spring groove; 16, pressure regulation seal ring; 17, air inlet sealing gasket; 18, second thimble; 2, cylinder block; 20, internal thread; 21, big piston chamber; 23, inlet hole; 24, exhaust port; 25, pressure gauge connection; 26, relief valve connection; 28, air storing cavity; 3, T shape piston; 31, vent radially; 32, axial throttle orifice; 33, plug; 34, small piston; 35, big piston; 36, pressure regulating spring; 4, pressure gauge; 5, safety valve; 51, spool; 53, spring; 54, gland; 55, handle; 6, air cylinder; 7, air cylinder air valve; 71, air valve chamber; 72, gas valve core; 75, spring for valve; 76, spring for valve groove; 77, T shape transfer port.
Embodiment
Below in conjunction with accompanying drawing specific embodiments of the invention are described in detail.
Referring to low pressure modulating valve shown in Figure 1, it comprises be threaded cover 1, cylinder block 2 and T shape piston 3.Be threaded to overlap on 1 and have outside thread 10, has internal thread 20 on the cylinder block 2, cooperation by outside thread 10 and internal thread 20, make cylinder block 2 and be threaded cover 1 mutually screw-thread fit connect, and pressure regulation seal ring 16 preferably should be set with the cover that is threaded between 1 in cylinder block 2, to keep sealing effect.
Be threaded the cover 1 and cylinder block 2 between form piston cavity, piston is in the piston cavity movably.The shape of piston can be cylindricality or other shapes, in desirable embodiment shown in Figure 1, piston is a T shape, be that it comprises diameter bigger big piston 35 and the less small piston 34 of diameter, accordingly, piston cavity also is divided into big piston chamber 21 and small piston chamber 11, and big piston chamber 21 is arranged in cylinder block 2, and small piston chamber 11 is positioned at the cover 1 that is threaded.Have on the T shape piston 3 along its radially vent 31 that radially extends with along its axially extended axial throttle orifice 32 that has restriction portion.Be with pressure regulating spring 36 on the small piston 34, on the cover 1 that is threaded, spring groove 14 is set, pressure regulating spring 36 promptly embeds in this spring groove 14, and the two ends of pressure regulating spring 36 are being supported be threaded cover 1 and big piston 35 respectively, provides a pressure to give T shape piston 3.And when being threaded cover 1 rotary cylinder body 2 relatively forward or backwards, pressure regulating spring 36 will be compressed or discharge.
Be threaded to overlap on 1 and offer throttling inlet hole 13, the cover 1 that is threaded has the intake interface that is communicated with throttling inlet hole 13 (among the figure not label), when practical application, air cylinder 6 promptly inserts this intake interface, and, can arrange air inlet sealing gasket 17 with the cover that is threaded between 1 at air cylinder 6, to keep sealing effect, this is a common technology.Can be in the outlet port of air cylinder 6 according to the air cylinder air valve 7 that is provided with like that shown in Figure 1, this air cylinder air valve 7 has air valve chamber 71, gas valve core 72, spring for valve 75, spring for valve groove 76 and T shape transfer port 77, gas valve core 72 is in the air valve chamber 71, offer T shape transfer port 77 on the gas valve core 72, spring for valve 75 is in the spring for valve groove 76, and spring for valve 75 is supporting gas valve core 72 and air-supply valve core 72 provides a pressure.
What be threaded cover 1 has first thimble 12 with the contiguous end (being shown as the lower end among Fig. 1) of intake interface, the be threaded end adjacent with T shape piston 3 (being shown as the upper end among Fig. 1) of cover 1 has second thimble 18, and throttling inlet hole 13 is applied between first thimble 12 and second thimble 18.The lower end of T shape piston 3 has plug 33, has an intersegmental crack between this plug 33 and second thimble 18.
Have air storing cavity 28 on the cylinder block 2, and have inlet hole 23 and the exhaust port 24 that is communicated with this air storing cavity 28 on the cylinder block 2, and the inlet hole 23 of cylinder block 2 also is connected with big piston chamber 21.Have pressure gauge connection 25 on cylinder block 2, pressure gauge 4 is installed in this pressure gauge connection 25, is used to monitor the gas pressure in the air storing cavity 28, thereby makes further adjusting.And superpressure danger takes place when preventing the too high derivation gas transmission of gas pressure in the air storing cavity 28, in the embodiment shown in fig. 1, the relief valve connection 26 that has relief hole 27 on the cylinder block 2 and be connected with this relief hole 27, safety valve 5 is installed in relief valve connection 26, and safety valve 5 is opened the gas that can make in the air storing cavity 28 and is discharged from relief hole 27.Safety valve 5 is mainly by spool 51, spring 53, gland 54 and shake hands 55 to form.Gland 54 and handle 55 are positioned at cylinder block 2 outsides, and spool 51 passes gland 54, and spring 53 is between spool 51 and the gland 54.When the gas in the cylinder block 2 acts on pressure on the spool 51 when having surpassed spring 53 and acting on the pressure of spool 51, spool 51 is just to cylinder block 2 movement outside, open and relief hole 27 when being connected with air storing cavity 28 to safety valve 5, the gases in the cylinder block 2 will be discharged from relief hole 27 immediately.
The interface 24 of giving vent to anger is gas delivery port, and wherein connection need provide the equipment of being bullied of the source of the gas of constant pressure.
The working procedure of the foregoing description is:
With reference to Fig. 1, air cylinder 6 is inserted the cover 1 and screwing of being threaded, being located at the gas valve core 72 that first thimble 12 of cover on 1 that be threaded will be located on the air cylinder 6 simultaneously this moment and backing down, making that the gases in the air cylinder 6 enter the throttling inlet hole 13 that being located on the cover 1 that is threaded by the T shape transfer port 77 that is located on the gas valve core 72.
After entering the gas process throttling for the first time step-down of throttling inlet hole 13, the radially vent 31 by T shape piston 3 enters axial throttle orifice 32 and is axially carrying out the step-down second time in the throttle orifice 32 again.Gas through step-down for the second time enters by the inlet hole on the cylinder block 2 23 in the air storing cavity 28 of cylinder block 2, then by interface 24 outputs of giving vent to anger.
When the gas in the air storing cavity 28 acts on pressure on the T shape piston 3 and acts on pressure on the T shape piston 3 greater than pressure regulating spring 36, T shape piston 3 can move downward, the plug 33 that is located at T shape piston 3 lower ends be located at the cover 1 that is threaded on second thimble 18 between the gap can reduce gradually, cause charge flow rate to reduce gradually, output pressure then begins to descend, when acting on pressure on the T shape piston 3 when the gas in the air storing cavity 28 and equal pressure regulating spring 36 and act on pressure on the T shape piston 3, T shape piston 3 can stop to move downward, and this moment, flow and pressure will keep constant.
When the gas in the air storing cavity 28 acts on pressure on the T shape piston 3 and acts on pressure on the T shape piston 3 less than pressure regulating spring 36, T shape piston 3 can move upward, the plug 33 that is located at T shape piston 3 lower ends be located at the cover 1 that is threaded on second thimble 18 between the gap increase gradually, cause charge flow rate to increase gradually, output pressure then begins to rise; When the gas in the air storing cavity 28 acted on pressure on the T shape piston 3 and equals pressure regulating spring 36 and act on pressure on the T shape piston 3, T shape piston 3 promptly stopped to move upward, and this moment, flow and pressure kept constant once more.
Certainly, the above-mentioned pressure that passes through is regulated and is played pressure that sulphur 36 provides and the unbalance T of the making shape piston 3 between the gas pressure in the air storing cavity 28 and move just at the output pressure fine adjustment during deviation slightly, and when practical application, change the air pressure that to export at the difference equipment of being bullied if desired, then need to regulate in the following manner.
Regulate the gas pressure of output if desired, the rotary cylinder body 2 forward or backwards, the T shape piston 3 that is located at cylinder block 2 this moment and is threaded between the cover 1 is understood the motions that take place downward or upward, when T shape piston 3 moves downward, pressure regulating spring 36 just is compressed, and because dwindling of the gap between the plug 33 and second thimble 18 makes the delivery pressure of gas descend; Otherwise when T shape piston 3 moved upward, pressure regulating spring 36 was released, and gas output pressure will rise.
When T shape piston 3 because of mechanical failure takes place can not be with the motion of gas pressure the time, this moment, air storing cavity 28 interior gas pressures will rise, when long to the time on the gas pressure greater than the operating pressure of safety valve 5, be located at spool 51 on the safety valve 5 and will move and safety valve 5 is opened, the gases in the air storing cavity 28 are discharged from relief hole 27 immediately.And the gas pressure in air storing cavity 28 is than the pressure of spring 53 hour, and spool 51 will be in the gas circuit of cutting off under spring 53 active forces between relief hole 27 and the air storing cavity 28.And the handle 55 that is arranged on cylinder block 2 outsides is connected with spool 51, can shake hands 55 safety valve 5 to be opened or closed by manual operation.
More than specific embodiment of the present invention is illustrated in conjunction with diagram; but protection content of the present invention is not only limited to above embodiment, in affiliated technical field of the present invention, and the common knowledge of a GPRS; just can in its technology main idea scope, carry out diversified change.
Claims (10)
1. low pressure modulating valve that is used for small-flow gas, it is characterized in that: it comprises
Cylinder block has air storing cavity in the described cylinder block, and described cylinder block is provided with inlet hole and the interface of giving vent to anger, and the described inlet hole and the interface of giving vent to anger are communicated to air storing cavity respectively;
Cover is threaded, the described cover that is threaded connects on screw-thread fit ground mutually with cylinder block, the described tackling that is threaded is useful on the intake interface that is connected with gas storage equipment, the throttling inlet hole that is connected with described intake interface, is formed with the piston cavity that is connected with both respectively between the inlet hole of throttling inlet hole and the cylinder block of the cover that is threaded;
Piston, described piston are arranged in the piston cavity of described main body, and described piston is provided with vent and throttle orifice, are used for the inlet hole that gas that the throttling inlet hole with the cover that is threaded certainly enters piston cavity exports to cylinder block.
2. low pressure modulating valve according to claim 1, it is characterized in that: cylinder block and be threaded the cover between be provided with a pressure regulating spring, this pressure regulating spring is used for providing an active force to piston, makes piston have the trend that the inlet hole towards cylinder block moves.
3. low pressure modulating valve according to claim 1, it is characterized in that: described piston comprises big piston and small piston, the diameter of big piston is greater than the diameter of small piston, described piston cavity correspondingly comprises big piston chamber and small piston chamber, described big piston is arranged in the big piston chamber, described small piston is arranged in the small piston chamber, and described pressure regulating spring is enclosed within on the small piston, and this pressure regulating spring provides a pressure to big piston.
4. low pressure modulating valve according to claim 3 is characterized in that: described big piston chamber is arranged in cylinder block.
5. low pressure modulating valve according to claim 3 is characterized in that: described small piston chamber is arranged in the cover that is threaded.
6. low pressure modulating valve according to claim 5 is characterized in that: be provided with spring groove in the described cover that is threaded, described pressure regulating spring embeds in this spring groove.
7. low pressure modulating valve according to claim 1, it is characterized in that: the adjoining end of the throttling inlet hole with the cover that is threaded of described piston has plug, between cover and the plug one section space that is used to enter air-flow is arranged in be threaded relative with this plug.
8. low pressure modulating valve according to claim 1, it is characterized in that: the vent on the described piston is along the radially extension of piston, vent radially is communicated to piston cavity, and the throttle orifice on the described piston is along the axial connection of piston, and axial throttle orifice is connected with vent.
9. according to the described low pressure modulating valve of one of claim 1-8, it is characterized in that: have relief valve connection that is communicated with air storing cavity and the relief hole that is used to discharge gas that is connected with this relief valve connection on the described cylinder block, in this relief valve connection, safety valve is installed, is used for the gas circuit between air storing cavity and the relief hole is cut off or opened.
10. low pressure modulating valve according to claim 9, it is characterized in that: described safety valve comprises spool, be enclosed within on the described spool and to spool provide active force spring, be fixed on the gland in the described relief valve connection, described spool passes gland and is inserted in movably in the relief valve connection, and described spring is arranged between spool and the gland.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205258182U CN201810840U (en) | 2010-09-13 | 2010-09-13 | Low-pressure regulating valve of small flow gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205258182U CN201810840U (en) | 2010-09-13 | 2010-09-13 | Low-pressure regulating valve of small flow gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201810840U true CN201810840U (en) | 2011-04-27 |
Family
ID=43893781
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205258182U Expired - Lifetime CN201810840U (en) | 2010-09-13 | 2010-09-13 | Low-pressure regulating valve of small flow gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201810840U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104989863A (en) * | 2015-06-08 | 2015-10-21 | 苏州珍展科技材料有限公司 | Pressure reduction valve controlled through compressed gas |
| CN106917954A (en) * | 2017-04-19 | 2017-07-04 | 四川金瑞气体有限公司 | A kind of Portable oxygen cylinder |
| CN110621869A (en) * | 2017-05-02 | 2019-12-27 | 德尔福知识产权有限公司 | Flushable low pressure regulator |
-
2010
- 2010-09-13 CN CN2010205258182U patent/CN201810840U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104989863A (en) * | 2015-06-08 | 2015-10-21 | 苏州珍展科技材料有限公司 | Pressure reduction valve controlled through compressed gas |
| CN104989863B (en) * | 2015-06-08 | 2017-12-12 | 海门市创豪工业设计有限公司 | A kind of pressure-reducing valve of compressed gas control |
| CN106917954A (en) * | 2017-04-19 | 2017-07-04 | 四川金瑞气体有限公司 | A kind of Portable oxygen cylinder |
| CN110621869A (en) * | 2017-05-02 | 2019-12-27 | 德尔福知识产权有限公司 | Flushable low pressure regulator |
| CN110621869B (en) * | 2017-05-02 | 2021-08-17 | 德尔福知识产权有限公司 | Flushable Low Pressure Regulator |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201474664U (en) | Pressure-adjustable gas safety recovery unit | |
| CN102052495A (en) | High-pressure natural gas reducing valve | |
| CN101663628A (en) | Maintenance regulator with improved boost performance | |
| CN206958339U (en) | Balanced pressure reducing valve | |
| CN201916494U (en) | Multi-step low-pressure regulating valve for small-flow gas | |
| CN201810840U (en) | Low-pressure regulating valve of small flow gas | |
| CN103615582A (en) | Pressure reduction valve | |
| CN108679280A (en) | Vibration proof pilot operated safety valve | |
| CN206347163U (en) | Spring loaded safety valve | |
| CN201963624U (en) | Pressure regulating valve to control oil pressure | |
| CN201705950U (en) | Gas control proportional flow rate valve | |
| CN202215810U (en) | Automatic adjusting pressure release valve | |
| CN202326136U (en) | Combined air inlet valve for automatically controlling air compressor | |
| CN102062242A (en) | Gas pressure regulator | |
| CN221321117U (en) | Water supply system | |
| CN204200720U (en) | A kind of capsule-type accumulator | |
| CN203906931U (en) | Pilot-operated type pressure reducing valve | |
| CN212867501U (en) | Multifunctional combined fracturing gas production wellhead device | |
| CN201428929Y (en) | Direct action type pressure regulator for super-high pressure | |
| CN202992300U (en) | Pressure adjusting device | |
| CN201844084U (en) | Novel stainless-steel pressure reducer | |
| CN209990967U (en) | Novel pressure stabilizing and reducing valve | |
| CN108980428A (en) | Air compressor machine in-line relief valve | |
| CN108506544A (en) | Adjustable pressure reducing valve for high pressure water | |
| CN203549041U (en) | Self-operated pressure regulating valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Suzhou Huaai Electronics Co., Ltd. Assignor: Ding Huimin Contract record no.: 2012320010003 Denomination of utility model: Low-pressure regulating valve of small flow gas Granted publication date: 20110427 License type: Exclusive License Record date: 20120206 |
|
| CX01 | Expiry of patent term |
Granted publication date: 20110427 |
|
| CX01 | Expiry of patent term |