CN201954062U - Non-balance-valve rod type gas pressure maintenance valve - Google Patents
Non-balance-valve rod type gas pressure maintenance valve Download PDFInfo
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- CN201954062U CN201954062U CN2011200194935U CN201120019493U CN201954062U CN 201954062 U CN201954062 U CN 201954062U CN 2011200194935 U CN2011200194935 U CN 2011200194935U CN 201120019493 U CN201120019493 U CN 201120019493U CN 201954062 U CN201954062 U CN 201954062U
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- valve
- valve body
- spring
- seat
- valve rod
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Abstract
The utility model discloses a non-balance-valve rod type gas pressure maintenance valve, which mainly comprises a first valve body, a second valve body, a valve seat and a spring pressure-regulating mechanism. A gas outlet cavity of the first valve body is connected with a gas outlet nozzle through a one-way valve, a gas inlet cavity of the second valve body is externally connected with a gas inlet nozzle and a needle valve, the first valve body and the second valve body are matched through threads, the matching end of the two valve bodies is provided with the tightly matching valve seat, the two axial ends of the valve seat are provided with corresponding conical holes, a valve stem is arranged in the second valve body, a sealed end of the valve stem adopts a cone and penetrates through the gas inlet cavity along the axial direction, a pressure bearing end of the valve stem is connected with the spring pressure-regulating mechanism, the contact parts of the conical holes with the smallest diameters and the cone at the sealed end of the valve stem are matched in a linear sealing way, and the top part of the cone at the sealed end of the valve stem is arranged in the conical holes of the valve seat. Since the first valve body and the valve stem are not matched directly, the difficulties in manufacturing of the first valve body and the tolerance matching requirements of the first valve body are reduced greatly, the bottleneck problem of constraint caused by excessive freedom in assembly is solved, the processing and the assembly are facilitated, and the yield is increased significantly.
Description
Technical field
The utility model relates to gas pressure control field, a kind of more precisely pressure 10-40MPa, volume flow 40Nm of being used for
3The non-equilibrium valve rod formula gas pressure maintaining valve of the following gas pressure control of/min.
Background technique
The compressor 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 spring to push down valve rod indirectly and regulates cracking pressure, required Packing spring pressure directly is directly proportional with the sealing larynx, sealing larynx footpath is big more, its required Packing spring pressure is just big more, so there is following shortcoming: 1, the load of spring is big, adjustment range is little and precision is low, is difficult for grasping; 2, big, the complex structure of boundary dimension, cost up; 3, the restriction owing to structure makes flow be limited within the specific limits, and the pressure reduction of closing pressure and cracking pressure is bigger, can only be applicable to float amount high pressure compressor.Retrieve widely at the problems referred to above, there is a kind of balanced type valve rod pressure holding valve to address the above problem, this balanced type valve rod pressure holding valve is to regulate by a valve rod that passes air-inlet cavity, valve seat taper hole and outlet chamber, but, because the valve rod of this balanced type valve rod pressure holding valve is long and insert outlet chamber, for the machinery assembling, degrees of freedom occurs and crosses constraint, cause very big difficulty for processing and assembling, the part reject rate is higher.
The model utility content
The purpose of this utility model is to provide a kind of non-equilibrium valve rod formula gas pressure maintaining valve, be intended to overcome existing balanced type valve rod pressure holding valve complex structure, mechanical fit on degrees of freedom occurs and crosses constraint, causes very big difficulty and the higher technological deficiency of part reject rate for processing and assembling.
The purpose of this utility model is achieved by the following technical programs:
Non-equilibrium valve rod formula gas pressure maintaining valve, mainly comprise first valve body, second valve body, valve seat and spring pressure-regulating device, the outlet chamber of first valve body connects an outlet nozzle by one-way valve, external air inlet nozzle of the air-inlet cavity of second valve body and needle-valve, first valve body and the second valve body screw-thread fit, the abutting end of described two valve bodies is established a friction tight valve seat, taper hole is split at the axial two ends of valve seat, air-inlet cavity, taper hole, outlet chamber connects successively with one heart, the second valve body center is provided with the valve rod hole with the concentric perforation of air-inlet cavity, be provided with valve rod 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 taper hole on the valve seat, and the minimum diameter position of taper hole 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 taper hole of valve seat.
The outlet chamber of described first valve body is connected cooperation by a valve connecting base with one-way valve, adopt the rubber seal crush seal between described one-way valve and the valve connecting base.
Described spring pressure-regulating device comprises a cap bag that is connected cooperation with second valve seat, 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 the second 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 and needle-valve axially be 180 °, air inlet nozzle and outlet nozzle axially be 90 °.
The utility model compared with prior art has following beneficial effect:
1, owing to not having direct matching relationship between first valve body in the utility model and the valve rod, greatly reduce the manufacture difficulty of first valve body and tolerance, cooperation requirement like this, the bottleneck problem that degrees of freedom is crossed constraint appears when having solved assembling, be convenient to processing and assembling, and reduce gold machining man-hour, make the valve body overall sealing performance better, easy processing, yield rate improves; 2, the processing that valve rod is easy to process, clamping of lathe just can be finished whole part, part coaxality height; 3, compact simple, stable performance, few easy workout part of unitary construction, processing is easy to assembly, interchangeability is strong, be beneficial to maintenance, use occasion is extensive; 4, the adjusting cracking pressure is very convenient, 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 valve rod conical surface and a valve seat taper hole linear sealing place structural representation among the utility model embodiment;
Fig. 3 is the A portion enlarged view of Fig. 1.
1 outlet nozzle, 2 check valve body, 3 springs, 4 nonreturn valve cores, 5 spool pores, 6 rubber seal, 7 valve connecting bases, 8 first valve bodies, 9 outlet chambers, 10 valve seats, 11 valve seat O type circles, 12 needle-valves, 13 air-inlet cavitys, 14 valve stem packing rings, 15 valve rods, 16 steel balls, 17 stroke limit covers, 18 spring seats, 19 pressure adjusting springs, 20 spring bearer plates, 21 cap bags, 22 nuts, 23 regulate bolt, 24 second valve bodies, 25 air inlet nozzle joints, 26 air inlet nozzles, 27 tapped holes.
Embodiment
As shown in Figure 1, non-equilibrium valve rod formula gas pressure maintaining valve volume flow of the present utility model is 40Nm
3Below/the min, pressure range mainly is made up of first valve body 8, second valve body 24, valve seat 10 and spring pressure-regulating device at 10-40MPa.Be provided with outlet chamber 9 in first valve body, the middle part of outlet chamber 9 has internal thread, cooperate with the outside thread of valve connecting base 7 one ends, the other end of valve connecting base 7 cooperates with the inlet end of check valve body 2, outlet nozzle 1 is connected by the outlet side of nut with check valve body 2, in conjunction with shown in Figure 3, have seal groove on the valve connecting base 7, and rubber seal 6 is inserted on the seal groove, be threaded with check valve body 2 then, the rubber seal 6 of this moment closely cooperates with the inwall of check valve body 2 and deformation takes place, being stuck in the seal groove tightly, and be unlikely to be washed out by high pressure draught.Check valve body 2 and valve connecting base 7 are connected by internal and external threads, and spring 3 is packed in nonreturn valve core 4 inner chambers, and nonreturn valve core 4 is packed in the check valve body 2; Have 6 places to become 20 ° spool pore 5 with center line on the nonreturn valve core 4, spool pore 5 communicates with valve core cavity, and valve core cavity communicates with outlet nozzle 1, also is provided with the tapped hole 27 that is used for fixing connection on first valve body; First valve body and second valve body connect into as a whole by internal and external threads; Be provided with air-inlet cavity 13 and valve rod circular hole in second valve body 24, at the middle part of second valve body by air inlet nozzle joint 25 and the needle-valve 12 of being threaded, air inlet nozzle joint 25 connects air inlet nozzles 26, air inlet nozzle 26 and needle-valve 12 axially be 180 °, air inlet nozzle and outlet nozzle axially be 90 °; In conjunction with shown in Figure 2, between first valve body 8 and second valve body 24 valve seat 10 that both ends of the surface are split taper hole is housed, valve seat 10 upper and lower surfaces are with valve seat O type circle 11; On valve rod 15, be with valve stem packing ring 14, pack into then in the valve rod circular hole of second valve body 24, valve stem packing ring 14 is cooperated with the valve rod circular-hole internal-wall of second valve body 24, the taper hole of air-inlet cavity 13, valve seat 10, outlet chamber 9 connect successively with one heart, the valve stem seal end is cone and passes air-inlet cavity vertically, the tapering of valve rod 15 sealed end cones is less than the tapering of taper hole on the valve seat 10, the minimum diameter position of taper hole is linear sealing with the contacting point of valve rod 15 sealed end cones and cooperates, and the top of valve rod 15 sealed end cones places in the taper hole of valve seat.
The valve rod compression end connects the spring pressure-regulating device, the adjustment pressure mechanism cooperates with the outside thread of second valve body 24 by the internal thread of its cap bag 21, cap bag 21 is provided with regulates bolt 23 and nut 22, regulate bolt 23 and push down pressure adjusting spring 19 in the cap bag by spring bearer plate 20, the other end of pressure adjusting spring 19 cooperates with spring seat 18, the spring seat 18 stroke limit cover 17 interior with being placed on second valve body cooperates, and stroke limit cover 17 is built-in with steel ball 16, and steel ball 16 cooperates with the compression end of valve rod 15.
When the gas flow one-way valve, gas pressure impels the nonreturn valve core pressure spring to move up, 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 rubber seal 6 downwards and closely cooperates, and air-flow path is shut, and reaches the effect of unidirectional ventilation.
In the said structure, at first tighten and regulate bolt 23, allow pressure adjusting spring 19 given pretightening force Ft, the taper hole of the conical surface of valve rod 15 left ends and valve seat 10 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 13 from air inlet nozzle, along with increasing of suction pressure PI, when suitable area difference, 15 moments of valve rod obtain 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 and the valve seat, and when the moment that valve rod is lifted off a seat, the thrust of opening valve rod becomes greatly [PI π d2
2/ 4], maintaining valve is opened into limit position rapidly, generally speaking, thrust after the increase is more than 2～3 times of pretightening force (Ft) of spring, because position-limit mechanism is arranged, the compressive force that spring is subjected to is constant under specific cracking pressure, is not subjected to extra pressure along with the increase of thrust.When source of the gas was closed, the PI value reduced 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 valve seat, makes valve rod and valve seat 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. non-equilibrium valve rod formula gas pressure maintaining valve, mainly comprise first valve body, second valve body, valve seat and spring pressure-regulating device, the outlet chamber of first valve body connects an outlet nozzle by one-way valve, external air inlet nozzle of the air-inlet cavity of second valve body and needle-valve, first valve body and the second valve body screw-thread fit, the abutting end of described two valve bodies is established a friction tight valve seat, taper hole is split at the axial two ends of valve seat, air-inlet cavity, taper hole, outlet chamber connects successively with one heart, the second valve body center is provided with the valve rod hole with the concentric perforation of air-inlet cavity, be provided with valve rod 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 taper hole on the valve seat, the minimum diameter position of taper hole 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 taper hole of valve seat.
2. non-equilibrium valve rod formula gas pressure maintaining valve according to claim 1 is characterized in that: the outlet chamber of described first valve body is connected cooperation by a valve connecting base with one-way valve, adopts the rubber seal sealing between described one-way valve and the valve connecting base.
3. non-equilibrium valve rod formula gas pressure maintaining valve according to claim 1, it is characterized in that: described spring pressure-regulating device comprises a cap bag that is connected cooperation with second valve seat, 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 the second 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. non-equilibrium valve rod formula gas pressure maintaining valve according to claim 1 is characterized in that: described air inlet nozzle and needle-valve axially be 180 °, air inlet nozzle and outlet nozzle axially be 90 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200194935U CN201954062U (en) | 2011-01-21 | 2011-01-21 | Non-balance-valve rod type gas pressure maintenance valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200194935U CN201954062U (en) | 2011-01-21 | 2011-01-21 | Non-balance-valve rod type gas pressure maintenance valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201954062U true CN201954062U (en) | 2011-08-31 |
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ID=44498172
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200194935U Expired - Fee Related CN201954062U (en) | 2011-01-21 | 2011-01-21 | Non-balance-valve rod type gas pressure maintenance valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201954062U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103775697A (en) * | 2012-10-22 | 2014-05-07 | 费希尔久安输配设备(成都)有限公司 | Spring adjusting device and valve assembly |
| CN104791529A (en) * | 2015-05-06 | 2015-07-22 | 成都华气厚普机电设备股份有限公司 | Adjustable safety valve |
| CN106352104A (en) * | 2016-11-25 | 2017-01-25 | 兰州高压阀门有限公司 | Sealable adjusting structure of 1500 DEG C ultra-high temperature valve stem |
| CN108506500A (en) * | 2018-03-08 | 2018-09-07 | 上海锋机五金模具有限公司 | A kind of safety pressure-regulating valve and its implementing process |
| CN109505752A (en) * | 2018-12-27 | 2019-03-22 | 昆山十全塑胶五金产品有限公司 | Can preset pressure value inflator |
-
2011
- 2011-01-21 CN CN2011200194935U patent/CN201954062U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103775697A (en) * | 2012-10-22 | 2014-05-07 | 费希尔久安输配设备(成都)有限公司 | Spring adjusting device and valve assembly |
| CN104791529A (en) * | 2015-05-06 | 2015-07-22 | 成都华气厚普机电设备股份有限公司 | Adjustable safety valve |
| CN106352104A (en) * | 2016-11-25 | 2017-01-25 | 兰州高压阀门有限公司 | Sealable adjusting structure of 1500 DEG C ultra-high temperature valve stem |
| CN108506500A (en) * | 2018-03-08 | 2018-09-07 | 上海锋机五金模具有限公司 | A kind of safety pressure-regulating valve and its implementing process |
| CN109505752A (en) * | 2018-12-27 | 2019-03-22 | 昆山十全塑胶五金产品有限公司 | Can preset pressure value inflator |
| CN109505752B (en) * | 2018-12-27 | 2023-12-12 | 昆山十全塑胶五金产品有限公司 | Inflator capable of presetting pressure value |
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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 |