CN201954063U - Gas pressure maintaining valve with volume flow rate lower than 10Nm<3>/min - Google Patents
Gas pressure maintaining valve with volume flow rate lower than 10Nm<3>/min Download PDFInfo
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- CN201954063U CN201954063U CN2011200195088U CN201120019508U CN201954063U CN 201954063 U CN201954063 U CN 201954063U CN 2011200195088 U CN2011200195088 U CN 2011200195088U CN 201120019508 U CN201120019508 U CN 201120019508U CN 201954063 U CN201954063 U CN 201954063U
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Abstract
The utility model discloses a gas pressure maintaining valve with a volume flow rate lower than 10Nm<3>/min. A one-way valve is arranged in a cavity of a gas outlet joint, the gas inlet end of the one-way valve is communicated with a gas inlet cavity of a valve body through an axial gas hole formed in a valve seat of a one-way valve and an axial gas hole formed in a valve seat of a pressure maintaining valve, the axial gas hole formed in the valve seat of the pressure maintaining seat is an axial two-end folio conical hole, the center of the valve body is provided with a valve rod hole eccentrically communicated with the gas inlet cavity, a valve rod is arranged in the valve rod hole, the sealing end of the valve rod is a cone body and axially penetrates the gas inlet cavity, the pressure bearing end of the valve rod is connected with a spring pressure regulation mechanism, the conicity of the cone body of the sealing end of the valve rod is smaller than the conicity of the axial gas hole formed in the valve seat of the pressure maintaining valve, the minimum diameter position of the axis conical gas hole is in linear sealing matching with the contact part of the cone body of the sealing end of the valve rod, and the top of the cone body of the sealing end of the valve rod is placed in the valve seat axis conical gas hole of the pressure maintaining valve. Because the gas outlet joint and the valve rod do not have the direct matching relationship, the manufacture difficulty is reduced, and the bottle neck problem of excessive freedom restriction during the assembly is solved.
Description
Technical field
The utility model relates to gas pressure control field, a kind of more precisely pressure range 10-35MPa, volume flow 10Nm of being used for
3The gas pressure maintaining valve of the following gas pressure control of/min.
Background technique
Pressure holding valve is a kind of without external energy; but manual tune valve unlatching value within the specific limits; and non-return function is arranged; be serially connected in the self-powering type valve on the gas delivery pipeline; its effect is to keep filter element not impacted by high velocity air and damage; after high pressure compressor starts operation; when gas pressure rises to the working condition requirement value before the valve; valve is opened rapidly; airspeed in the equipment for after-treatment is slowed down; the safe operation of protection equipment, when emergency shutdown or misoperation occurring, its non-return function can not flow backwards pressurized gas.
Because traditional pressure holding valve adopts overcoat, valve body, screw, axle bush up and down, steel ball, a series of textural association such as connecting-tube nozzle is assembled, and has following shortcoming: 1, complex structure, component are too much, the rubber obturator is fragile, the assembling difficulty, and manufacture cost is higher; 2, overcoat needs directly to withstand the valve body screw thread with the screw jackscrew after regulating spring pressure, causes the valve body screw thread to damage easily.Retrieve widely at the problems referred to above, do not find relevant technical solution as yet.
The model utility content
The purpose of this utility model is to provide a kind of volume flow 10Nm
3The following gas pressure maintaining valve of/min is intended to overcome existing complicated, the mechanical fit on of pressure holding valve structure and degrees of freedom occurs and cross constraint, causes very big difficulty for processing and assembling.
The purpose of this utility model is achieved by the following technical programs:
Volume flow 10Nm
3The following gas pressure maintaining valve of/min, mainly comprise the outlet nozzle joint, valve body, valve seat and spring pressure-regulating device, the middle cavities of outlet nozzle joint is equipped with one-way valve, the inlet end of one-way valve is communicated with the air-inlet cavity of valve body by one-way valve seat axis pore and pressurize valve seat axis pore, the outlet side of one-way valve picks out valve by air outlet adapter, external air inlet nozzle joint of the air-inlet cavity of valve body and needle-valve, air outlet adapter and valve body screw-thread fit, one-way valve seat, drive fit between pressure retaining valve valve seat and the air-inlet cavity end face, the axis pore of pressure retaining valve valve seat is that cone shape hole is split at axial two ends, the valve body center is provided with the valve rod hole with the concentric perforation of air-inlet cavity, valve rod is housed in the valve rod hole, the valve stem seal end is cone and passes air-inlet cavity vertically, the valve rod compression end connects the spring pressure-regulating device, it is characterized in that: the tapering of valve stem seal end cone is less than the tapering of abutting end axis pore with it on the pressure retaining valve valve seat, the minimum diameter position of described axis taper pore is linear sealing with the contacting point of valve stem seal end cone and cooperates, and the top of valve stem seal end cone places in the axis taper pore of pressure retaining valve valve seat.
The inlet end of described one-way valve is by air outlet adapter and valve body screw-thread fit, and the sealing of the valve seat O type circle compressional deformation between passing through.
Described spring pressure-regulating device comprises a cap bag that is connected cooperation with valve body, be provided with pressure adjusting spring in the cap bag, one end of pressure adjusting spring cooperates with spring seat, spring seat cooperates with the stroke limit cover of valve body inner valve stem compression end, the stroke limit cover is built-in with steel ball, and steel ball cooperates with the valve rod compression end, and the spring bearer plate in the other end of pressure adjusting spring and the cap bag cooperates, the cap bag outer end is provided with regulates bolt and nut, regulates bolt and pushes down pressure adjusting spring in the cap bag by spring bearer plate.
Described air inlet nozzle joint and needle-valve axially be 180 °, air inlet nozzle joint and outlet nozzle axially be 90 °.
The utility model compared with prior art has following beneficial effect:
1, the processing that valve rod is easy to process, clamping of lathe just can be finished whole part, part coaxality height; 2, do not need obturator, use valve stem packing ring sealing 3, unitary construction compact simple, stable performance, few easy workout part instead, processing is easy to assembly, interchangeability is strong, be beneficial to maintenance, use occasion is extensive; 4, the adjusting cracking pressure is very convenient, does not need the screw jackscrew, regulates the setting accuracy height, and spring need only overcome very little gas differential pressure; 5, can set the pressure holding valve of different value, according to technological process, can serial or parallel connection in pipeline, become the auto-programming valve, widened using scope.The spring of controlling mechanism is less, makes that compact overall structure is attractive in appearance, processing is simple, assembling is convenient; 6, one-way valve adopt that soft seal, seal ring can not blown off by pressurized gas, compact structure, stable performance, make the tight more and noiseless of sealing, can connect easy maintenance separately.
Description of drawings
Fig. 1 is the utility model embodiment's a sectional structure schematic representation;
Fig. 2 is the A portion enlarged view of Fig. 1.
1 outlet nozzle, 2 air outlet adapters, 3 springs, 4 nonreturn valve cores, 5 spool pores, 6 seal rings, 7 one-way valve seats, 8 pressure retaining valve valve seats, 9 valve seat O type circles, 10 vent holes, 11 needle-valves, 12 air-inlet cavitys, 13 valve stem packing rings, 14 valve rods, 15 steel balls, 16 stroke limit covers, 17 spring seats, 18 pressure adjusting springs, 19 spring bearer plates, 20 cap bags, 21 nuts, 22 regulate bolt, 23 valve bodies, 24 air inlet nozzle joints.
Embodiment
As shown in Figure 1, gas pressure maintaining valve volume flow of the present utility model is 10Nm
3Below/the min, pressure range mainly is made up of air outlet adapter 2, valve body 23, pressure retaining valve valve seat 8 and spring pressure-regulating device at 10-35MPa.The middle cavities of air outlet adapter 2 is equipped with one-way valve, the inlet end of one-way valve is communicated with the air-inlet cavity 12 of valve body 23 by one-way valve seat 7 axis pores and pressure retaining valve valve seat 8 axis pores, the outlet side of one-way valve picks out valve 1 by air outlet adapter 2, external air inlet nozzle joint 24 of the air-inlet cavity of valve body 23 and needle-valve 11, air inlet nozzle joint 24 and needle-valve 11 axially be 180 °, air inlet nozzle joint 24 and outlet nozzle 1 axially be 90 °, air outlet adapter 2 and valve body 23 screw-thread fit, be provided with air-inlet cavity 12 and valve rod hole in the valve body 23 vertically, dress valve rod 14 in the valve rod hole, one-way valve seat, drive fit between pressure retaining valve valve seat and the air-inlet cavity end face, the axis pore of pressure retaining valve valve seat 8 is that taper hole is split at axial two ends, be with O type circle 9 on the pressure retaining valve valve seat, six pores 5 that become 20 ° of angles with center line are arranged on the nonreturn valve core 4, spring 3 is put into the inner chamber of nonreturn valve core 4, be contained in then in the inner chamber of air outlet adapter 2, have seal groove on the one-way valve seat 7, seal ring 6 is inserted on the seal groove, and then the air outlet adapter 2 of packing into, deformation takes place because of the inwall with air outlet adapter 2 closely cooperates in the seal ring of this moment, being stuck in the seal groove tightly, and be unlikely to be washed out by high pressure draught, at this moment spring, nonreturn valve core, one-way valve seat and connecting-tube nozzle have become an overall structure, in the internal thread that screws into valve body by air outlet adapter 2, prop up pressure retaining valve valve seat 8, at this moment pressure retaining valve valve seat 8 is by being clipped in the valve body 23 tightly, and valve seat O type circle 9 can effectively stop pressurized gas to flow out from the slit of Spielpassung.Be with valve stem packing ring 13 on valve rod 14, in the valve rod hole of the valve body 23 of packing into, the inwall of valve stem packing ring and valve body valve rod hole fitted, the gap of crossing between valve rod and the valve rod hole with the air communication that prevents to enter valve inner flows to cap bag 20 ends.Valve rod 14 sealed ends are cone and pass the axis pore that air-inlet cavity enters pressure retaining valve valve seat 8 vertically, the tapering of valve rod 14 sealed end cones is less than the tapering of axis pore on the pressure retaining valve valve seat 8, the minimum diameter position of axis pore is linear sealing with the contacting point of valve rod 14 sealed end cones and cooperates, and the top of valve rod 14 sealed end cones places in the taper axis pore of pressure retaining valve valve seat 8.Needle-valve 11 is connected with valve body 23 by screw thread, is the linear sealing form with valve body, when stopping air feed, unscrews needle-valve, and the gas of valve inner remnants can be by outside vent hole 10 expulsion valves.Air inlet nozzle joint 24 is threaded with valve body.
Valve rod 14 compression end connect the spring pressure-regulating device, the adjustment pressure mechanism cooperates with the outside thread of valve body 23 by the internal thread of its cap bag 20, cap bag 20 is provided with regulates bolt 22 and nut 21, regulate bolt 22 and push down pressure adjusting spring 18 in the cap bag 20 by spring bearer plate 19, the other end of pressure adjusting spring 18 cooperates with spring seat 17, spring seat 17 cooperates with stroke limit cover 16 in being placed on valve body 23, and stroke limit overlaps 16 and is built-in with steel ball 15, and steel ball 15 cooperates with the compression end of valve rod 14.
When the gas flow one-way valve, gas pressure impels the nonreturn valve core pressure spring to be moved to the left, and air communication is crossed the nonreturn valve core pore to the nonreturn valve core inner chamber, flows out outlet nozzle; When the reverse air inlet of gas, gas pressure is depressed into the nonreturn valve core upper-end surface, impels nonreturn valve core to be subjected to displacement with seal ring to the right and closely cooperates, and air-flow path is shut, and reaches the effect of unidirectional ventilation.
At first tighten in the said structure and regulate bolt 22, allow pressure adjusting spring 18 given pretightening force Ft, the axis taper pore of the conical surface of valve rod 14 left ends and pressure retaining valve valve seat 8 is tightly fitted be linear sealing, as shown in Figure 2, stem diameter d2 is the diameter d 0 of linear sealing place greater than taper hole.Inject pressurized gas to air-inlet cavity 12 from air inlet nozzle joint 24, along with increasing of suction pressure PI, when suitable area difference, spool moment obtains a pretension thrust [PI π (d2 who overcomes spring
2-d0
2)/4]＞Ft (pretightening force of spring), air pressure promotes to be subjected to displacement between valve rod 14 and the pressure retaining valve valve seat, and when valve rod leaves moment of pressure retaining valve valve seat, the thrust change of opening valve rod is [PI π d2 greatly
2/ 4], pressure retaining valve is opened into limit position rapidly, generally speaking, thrust after the increase is more than 2～3 times of former thrust (Ft), but because position-limit mechanism is arranged, the compressive force that spring is subjected to is constant under specific cracking pressure, be not subjected to extra pressure along with the increase of thrust, after valve rod moves right, air communication is crossed pressure retaining valve valve seat 8 to one-way valve seat 7, gas pressure impels nonreturn valve core 4 pressure springs 3 to be moved to the left, and is flowing out outside the valve to outlet nozzle 1 by spool pore 5.When gas during from the outlet nozzle air inlet, gas pressure is depressed on nonreturn valve core 4 left sides, and nonreturn valve core 4 and seal ring 6 are closely cooperated, and air-flow path is shut.When source of the gas is closed, suction pressure PI value reduces gradually, gas pressure [PI π d2
2/ 4]＜and the pretension thrust of Ft spring, spring promotes valve rod and is subjected to displacement to the pressure retaining valve valve seat, makes valve rod 14 and pressure retaining valve valve seat 8 be linear sealing, reaches and closes purpose.
The foregoing description only is a better embodiment of the present utility model; describe technical conceive of the present utility model and essential implementation in detail; be not to be that protection domain of the present utility model is limited; all any simple modification and equivalent structure transformation or modifications of being done according to the utility model spirit all should be encompassed within the protection domain of the present utility model.
Claims (4)
1. volume flow 10Nm
3The following gas pressure maintaining valve of/min, mainly comprise air outlet adapter, valve body, valve seat and spring pressure-regulating device, the middle cavities of air outlet adapter is equipped with one-way valve, the inlet end of one-way valve is communicated with the air-inlet cavity of valve body by one-way valve seat axis pore and pressure retaining valve valve seat axis pore, the outlet side of one-way valve picks out valve by air outlet adapter, external air inlet nozzle joint of the air-inlet cavity of valve body and needle-valve, air outlet adapter and valve body screw-thread fit, one-way valve seat, drive fit between pressure retaining valve valve seat and the air-inlet cavity end face, the axis pore of pressure retaining valve valve seat is that cone shape hole is split at axial two ends, the valve body center is provided with the valve rod hole with the concentric perforation of air-inlet cavity, valve rod is housed in the valve rod hole, the valve stem seal end is cone and passes air-inlet cavity vertically, the valve rod compression end connects the spring pressure-regulating device, it is characterized in that: the tapering of valve stem seal end cone is less than the tapering of abutting end axis pore with it on the valve seat, the minimum diameter position of described axis taper pore is linear sealing with the contacting point of valve stem seal end cone and cooperates, and the top of valve stem seal end cone places in the axis taper pore of valve seat.
2. volume flow 10Nm according to claim 1
3The following gas pressure maintaining valve of/min is characterized in that: the inlet end of described one-way valve is by air outlet adapter and valve body screw-thread fit, and the sealing of the valve seat O type circle compressional deformation between passing through.
3. volume flow 10Nm according to claim 1
3The following gas pressure maintaining valve of/min, it is characterized in that: described spring pressure-regulating device comprises a cap bag that is connected cooperation with valve body, be provided with pressure adjusting spring in the cap bag, one end of pressure adjusting spring cooperates with spring seat, spring seat cooperates with the stroke limit cover of valve body inner valve stem compression end, the stroke limit cover is built-in with steel ball, steel ball cooperates with the valve rod compression end, spring bearer plate in the other end of pressure adjusting spring and the cap bag cooperates, the cap bag outer end is provided with regulates bolt and nut, regulates bolt and pushes down pressure adjusting spring in the cap bag by spring bearer plate.
4. volume flow 10Nm according to claim 1
3The following gas pressure maintaining valve of/min is characterized in that: described air inlet nozzle joint and needle-valve axially be 180 °, air inlet nozzle joint and outlet nozzle axially be 90 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200195088U CN201954063U (en) | 2011-01-21 | 2011-01-21 | Gas pressure maintaining valve with volume flow rate lower than 10Nm<3>/min |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200195088U CN201954063U (en) | 2011-01-21 | 2011-01-21 | Gas pressure maintaining valve with volume flow rate lower than 10Nm<3>/min |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201954063U true CN201954063U (en) | 2011-08-31 |
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ID=44498173
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200195088U Expired - Fee Related CN201954063U (en) | 2011-01-21 | 2011-01-21 | Gas pressure maintaining valve with volume flow rate lower than 10Nm<3>/min |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201954063U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102853161A (en) * | 2012-08-29 | 2013-01-02 | 铜陵艾纶纺织品有限责任公司 | Valve rod with positioning ring |
| CN105276242A (en) * | 2015-11-30 | 2016-01-27 | 玉林市川迪机器制造有限公司 | One-way valve of excavator tensioning device |
| CN106194696A (en) * | 2016-08-31 | 2016-12-07 | 瑞立集团瑞安汽车零部件有限公司 | A kind of automobile air compressor of release No Load Start |
| CN110864144A (en) * | 2019-11-29 | 2020-03-06 | 天津市亿鑫锋机械配件有限公司 | Pump body outlet one-way valve |
| CN114054891A (en) * | 2020-07-30 | 2022-02-18 | 上海创拼机电科技有限公司 | Double-gas-path separation pressure regulating device |
-
2011
- 2011-01-21 CN CN2011200195088U patent/CN201954063U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102853161A (en) * | 2012-08-29 | 2013-01-02 | 铜陵艾纶纺织品有限责任公司 | Valve rod with positioning ring |
| CN105276242A (en) * | 2015-11-30 | 2016-01-27 | 玉林市川迪机器制造有限公司 | One-way valve of excavator tensioning device |
| CN106194696A (en) * | 2016-08-31 | 2016-12-07 | 瑞立集团瑞安汽车零部件有限公司 | A kind of automobile air compressor of release No Load Start |
| CN110864144A (en) * | 2019-11-29 | 2020-03-06 | 天津市亿鑫锋机械配件有限公司 | Pump body outlet one-way valve |
| CN114054891A (en) * | 2020-07-30 | 2022-02-18 | 上海创拼机电科技有限公司 | Double-gas-path separation pressure regulating device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: BENGBU FANGZHENG GAS EQUIPMENT CO., LTD. Free format text: FORMER NAME: BENGBU FANGZHENG GAS PURIFICATION EQUIPMENT CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: Double Pier Road 233000 Anhui city of Bengbu province Huaishang District No. 2688 Patentee after: BENGBU FANGZHENG GAS PURIFICATION EQUIPMENT CO., LTD. Address before: A-2 Lu Nan Huai Industrial Park 233000 Anhui city of Bengbu Province Patentee before: Bengbu Fangzheng Gas Purification Equipment Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110831 Termination date: 20150121 |
|
| EXPY | Termination of patent right or utility model |