CN201521309U - Safety valve - Google Patents
Safety valve Download PDFInfo
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- CN201521309U CN201521309U CN2009202794503U CN200920279450U CN201521309U CN 201521309 U CN201521309 U CN 201521309U CN 2009202794503 U CN2009202794503 U CN 2009202794503U CN 200920279450 U CN200920279450 U CN 200920279450U CN 201521309 U CN201521309 U CN 201521309U
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Abstract
The utility model relates to a safety valve that comprises a valve core, a valve body part and a spring. The valve core is a column body that is provided with a blind hole on the end surface of the tail part in the axial direction; a liquid drainage hole that is communicated with the blind hole is arranged on the external wall of the column body; the valve body part comprises a valve body and a shell, wherein the valve body is provided with an internal chamber which can accommodate the valve core and the shell can support the valve body; a liquid inlet end and a liquid drainage passage communicated with the internal chamber are formed on corresponding position of the external wall of the valve body; the spring is arranged in the shell; the upper end of the spring props against the head part of the valve core; the spring has a prearranged bias pressure and leads the valve core to be at a non-relief working state; and the liquid drainage passage is not communicated with the inner part of the shell and is directly communicated with the outside part of the valve body part. In the utility model, unloaded emulsion is not drained out of the valve shell which is provided with the spring, and the safety valve also prevents the rusting and ageing of the spring and prolongs the service life.
Description
Technical field
The utility model relates to a kind of safety valve, specifically, is a kind of high-flow safety valve that is used for the coal mine fully-mechanized mining working hydraulic support.
Background technology
Safety valve be a kind of can be according to the valve body of operating pressure automatic open and close, generally be installed on protection system safety on the equipment of closed system or the pipeline.When the equipment of closed system or the pressure in the pipeline surpassed setting, safety valve was promptly opened pressure release automatically, and assurance equipment and pipeline internal medium pressure try to avert accidents in regulation numerical value.Safety valve structure mainly contains two big classes: spring, lever and pilot operated safety valve, wherein spring loaded safety valve is to utilize the power of compression spring to come the power of balanced action on flap, thereby the open and close of control flap are used comparatively general in process of production.Chinese patent literature CN201037425Y has proposed a kind of safety valve that metered flow is 500L/min that is used for, it comprises valve body and valve casing, valve body and valve casing interference fit, valve body is provided with the third gear seal groove, and the composite seal device of packing in the seal groove and being made up of polytetrafluoroethylene (PTFE) and rubber is provided with strainer at the valve body front end, spool is provided with two row's outages, the spool of packing into successively from the valve casing lower end, spring base, little spring, big spring are screwed into voltage regulation screw at last.This utility model flow is big, dynamic response is fast, the pillar that can guarantee the coal mine fully-mechanized mining working hydraulic support has constant-resistance operating characteristic and contractibility, but there is following shortcoming in actual use: 1, the safety valve of this utility model is when unloading, the unloading emulsion be to enter from the valve body upper port, discharge from the outage of spool sidewall, apocenosis passage in leading to valve casing enters greatly then, in the valve casing at little spring place, discharge outside the safety valve at last, emulsion has usually to corrosion of metal, through excessive, during little spring, it is aging to cause spring to get rusty easily, the aging not only emulsion of easy contaminated stream warp that gets rusty of spring, emulsion must just can be recycled after treatment, the more important thing is that the aging back of spring elastic force descends, when the pressure in equipment or the pipeline does not reach the setting of unloading, the safety valve release that promptly is unlocked, had a strong impact on the work of hydraulic support, cause security incident easily, must guarantee the steady operation of safety valve by frequent replacing spring, this has increased use cost and staff's maintenance work undoubtedly, has incured loss through delay job schedule; 2, this utility model lacks the spool limiting and protecting device; when system pressure was higher than minimum setting pressure of relief valve, spool may be deviate from valve body rapidly under the effect of high-pressure emulsion, directly inject in the valve casing; thereby each part in the damage valve casing, the application life of having reduced safety valve.
The utility model content
For this reason, technical problem to be solved in the utility model is that the carrier fluid that unloads of safety valve of the prior art discharges in the valve casing that spring is housed and cause spring in the valve casing aging problem that gets rusty easily, the safety valve that the emulsion that a kind of unloading is provided is not discharged in the valve casing that spring is housed.
Further solve safety valve of the prior art because of lacking the spool limiting and protecting device, thereby caused spool under the effect of high-pressure emulsion, deviate from valve body rapidly, directly injected in the valve casing, damaged the problem of each part in the valve casing.
For solving the problems of the technologies described above, a kind of safety valve of the present utility model comprises
Spool, described spool are the cylinder that tail end face is provided with the blind hole of axial direction, form the outage that communicates with described blind hole on the outer wall of described cylinder;
The valve body part, described valve body branch comprises valve body that forms the inner chamber that described spool is set and the housing that supports described valve body, described inner chamber is fit to described spool and in axial direction slidably reciprocates within it, form the apocenosis passage that liquid feeding end communicates with described inner chamber on the relevant position of described valve outer wall, when described spool is in non-pressure release duty, stagger in the position of described outage and described apocenosis passage, when described spool was in the pressure release duty, described outage communicated with described apocenosis passage;
Spring, described spring is arranged in the described housing, and the upper end of described spring props up the head of described spool, and described spring has default biasing force, and makes described spool be in non-pressure release duty;
Described apocenosis passage is not communicated with described enclosure interior, directly communicates with described valve body portion of external.
Above-mentioned safety valve, be provided with between described valve body and the described spool spacing stopping means is carried out in the slip of described spool axial direction, described stopping means can be guaranteed when described spool is in the pressure release duty, described outage on the described spool communicates with apocenosis passage on the described valve body, when described spool was in non-pressure release duty, described outage on the described spool and the apocenosis passage on the described valve body staggered.
Above-mentioned safety valve, described stopping means comprises the defining flange that is arranged on the described spool outer wall, and on the relevant position of described body cavity wall, form be suitable for the limit chamber that described defining flange in axial direction slides within it, described limit chamber has described defining flange is carried out spacing upper limit platform of axial direction and lower limit platform, described lower limit platform is made of the stepped hole that is molded on the described body cavity wall, described upper limit platform is made of the end face plugging device of the open end of blocking described stepped hole that inserts from described valve body upper end inner chamber, and the tail end that place, described end face plugging device axle center forms the tail end insertion that is fit to described spool inserts the chamber.
Above-mentioned safety valve, described end face plugging device is a screw plug, forms external screw thread on the outer wall of the insertion end of described screw plug, forms the internal thread that matches with described external screw thread on the relevant position of described body cavity wall; Or described end face plugging device forms on the outer wall of described middle base with described tail end and inserts the intercommunicating pore that the chamber communicates for distance cover and pile up and be arranged on the middle base that described distance puts, and described intercommunicating pore constitutes the inlet of described apocenosis passage.
Above-mentioned safety valve, the liquid feeding end of described valve body is provided with the linkage with extraneous pipeline connection in addition.
Above-mentioned safety valve, described linkage are the external screw thread that is arranged on the described valve body liquid feeding end outer wall.
Above-mentioned safety valve, described linkage is the snap joint that insertion end is cartridge type, form external screw thread on the outer wall of described snap joint insertion end, described valve body liquid feeding end end face is formed with and is fit to the annular insertion chamber that described snap joint is inserted, and forms the internal thread that matches with described external screw thread on the relevant position of the inwall that the diameter that described annular is inserted the chamber is bigger.
Above-mentioned safety valve, described annular insert the chamber by the inwall of described valve body liquid feeding end and pile up the described distance cover of one and the outer wall of described middle base between the space formed, form the intermediate throughholes that communicates with the described intercommunicating pore of described middle base on the relevant position of the outer wall of the insertion end of described snap joint, described intermediate throughholes constitutes the interlude of described apocenosis passage.
Above-mentioned safety valve, the outer wall of described valve body are provided with the tubular protective jacket that unloads carrier fluid that blocks from the liquid outlet ejection of described apocenosis passage, have certain clearance between the inwall of described tubular protective jacket and the described valve outer wall.
Above-mentioned safety valve, described limit chamber constitutes the inlet of described apocenosis passage, the inwall of pairing described valve interior wall in the upper and lower of the above outage of axial direction and described apocenosis passage and described end face plugging device is provided with seal groove, is provided with the rectangle combined seal ring in the described seal groove; Be provided with spring base in addition between described spring and the described spool head, the upper end of described spring is against the lower surface of described spring base, described spool head forms hemisphere, form the conical bore that inserts for the hemisphere of described spool head on the upper surface of described spring base, and the lower surface of described spring base is provided with an air vent and communicates with described conical bore; The lower end of described spring props up the upper surface of a voltage regulation screw, be provided with pad between described spring and the described voltage regulation screw, the inwall of the lower end of described housing is provided with the internal thread that matches with external screw thread on the described voltage regulation screw, described voltage regulation screw sidewall is provided with pin-and-hole, the relevant position of described valve casing is provided with the hole, one resilient key inserts in described hole and the described pin-and-hole described voltage regulation screw is spacing fixing, also is provided with exhaust hole on the end face of described voltage regulation screw.
Technique scheme of the present utility model has the following advantages compared to existing technology, 1, the apocenosis passage of safety valve of the present utility model is not communicated with enclosure interior, directly communicate with the valve body portion of external, make and unload carrier fluid no longer through being provided with in the housing of spring, thereby avoided directly contacting that to cause spring to get rusty aging because of what unload carrier fluid and spring, prolong the application life of spring, thereby prolonged the application life of safety valve; 2, in the utility model, be provided with between valve body and the spool spacing stopping means is carried out in the slip of spool axial direction, even not only can guarantee when system pressure is a lot of greater than the default pressure of spring, spool does not penetrate valve body, in the time of can also guaranteeing that spool is in the pressure release duty, the outage on the outer wall always communicates with apocenosis passage on the valve body; 3, in the utility model, the outer wall of valve body is provided with the tubular protective jacket that unloads carrier fluid that blocks from the liquid outlet ejection of apocenosis passage, can prevent to have certain pressure unload carrier fluid directly ejection can hurt people or thing, have certain clearance between the inwall of tubular protective jacket and the valve outer wall, make the unloading carrier fluid and can flow down of ejection along tubular protective jacket inwall.
Description of drawings
For the easier quilt of content of the present utility model is clearly understood, according to specific embodiment of the utility model also in conjunction with the accompanying drawings, the utility model is described in further detail, wherein below
Fig. 1 is the sectional view of the embodiment one of safety valve of the present utility model;
Fig. 2 is the sectional view of the embodiment two of safety valve of the present utility model.
Reference numeral is expressed as among the figure: 1-spool, 2-outage, 3-valve body, 4-housing, 5-apocenosis passage, 6-spring, 7-defining flange, 8-limit chamber, 9-screw plug, 10-are apart from cover, 11-middle base, 12-snap joint, 13-tubular protective jacket, 14-rectangle combined seal ring, 15-spring base, 16-voltage regulation screw, 17-pad, 18-resilient key.
The specific embodiment
As shown in Figure 1, the safety valve of present embodiment comprises spool 1, valve body part and spring 6, and described spool 1 is the cylinder that tail end face is provided with the blind hole of axial direction, forms the outage 2 that communicates with described blind hole on the outer wall of described cylinder; Described valve body branch comprises valve body 3 that forms the inner chamber that described spool 1 is set and the housing 4 that supports described valve body 3, described inner chamber is fit to described spool 1 and in axial direction slidably reciprocates within it, form the apocenosis passage 5 that liquid feeding end communicates with described inner chamber on the relevant position of described valve body 3 outer walls, when described spool 1 is in non-pressure release duty, described outage 2 staggers with the position of described apocenosis passage 5, when described spool 1 was in the pressure release duty, described outage 2 communicated with described apocenosis passage 5; Described spring 6 is arranged in the described housing 4, and the upper end of described spring 6 props up the head of described spool 1, and described spring 6 has default biasing force, and makes described spool 1 be in non-pressure release duty; Described apocenosis passage 5 not with described housing 4 internal communication, directly communicate with described valve body portion of external, make and unload carrier fluid no longer through being provided with in the described housing 4 of described spring 6, thereby avoided causing described spring 6 to get rusty aging with direct contact of described spring 6 because of unloading carrier fluid, prolong the application life of described spring 6, thereby prolonged the application life of safety valve.In order to prevent when system pressure is higher than minimum setting pressure of relief valve, described spool 1 may be deviate from described valve body 3 rapidly under the effect of high pressure unloading liquid, directly inject in the described housing, thereby damage each part in the described housing, reduce the application life of safety valve, be provided with between described valve body 3 and the described spool 1 spacing stopping means is carried out in the slip of described spool 1 axial direction, described stopping means can be guaranteed when described spool 1 is in the pressure release duty, described outage 2 on the described spool 1 communicates with apocenosis passage 5 on the described valve body 3, when described spool 1 was in non-pressure release duty, the described outage 2 on the described spool 1 staggered with the apocenosis passage 5 on the described valve body 3.In the present embodiment, described stopping means comprises the defining flange 7 that is arranged on described spool 1 outer wall, and on the relevant position of described valve body 3 internal chamber walls, form be suitable for the limit chamber 8 that described defining flange 7 in axial direction slides within it, described limit chamber 8 has described defining flange 7 is carried out spacing upper limit platform of axial direction and lower limit platform, when described spool 1 is in non-pressure release duty, the distance of the soffit of described defining flange 7 between the described lower limit platform upper surface is not less than when described spool 1 is in non-pressure release duty described outage 2 residing positions when described outage 2 has just communicated with described apocenosis passage 5, axial distance between described outage 2 present positions is not more than the axial distance of described outage 2 present positions when described outage 2 has just staggered with described apocenosis passage 5, when described spool 1 is in non-pressure release duty described outage 2 residing positions downwards.In the present embodiment, described lower limit platform is made of the stepped hole that is molded on described valve body 3 internal chamber walls, described upper limit platform is made of the end face plugging device of the open end of blocking described stepped hole that inserts from described valve body 3 upper end inner chambers, the tail end that place, described end face plugging device axle center forms the tail end insertion that is fit to described spool 1 inserts the chamber, in the present embodiment, described end face plugging device is a screw plug 9, form external screw thread on the outer wall of the insertion end of described screw plug 9, form the internal thread that matches with described external screw thread on the relevant position of described valve body 3 internal chamber walls; The liquid feeding end of described valve body 3 is provided with the linkage with extraneous pipeline connection in addition, and in the present embodiment, described linkage is the external screw thread that is arranged on the described valve body 3 liquid feeding end outer walls.In order to prevent unloading the direct ejection of carrier fluid and may hurt people or thing from the ejection of the liquid outlet of described apocenosis passage 5, the outer wall of described valve body 3 is provided with the tubular protective jacket 13 that unloads carrier fluid that blocks from the liquid outlet ejection of described apocenosis passage 5, have certain clearance between the inwall of described tubular protective jacket 13 and described valve body 3 outer walls, make the unloading carrier fluid and can flow down of ejection along described tubular protective jacket 13 inwalls.Described limit chamber 8 constitutes the inlet of described apocenosis passage 5, can reduce the step of the described limit chamber 8 of other processing, pairing described valve body 3 inwalls in upper and lower of the above outage 2 of axial direction and described apocenosis passage 5 and the inwall of described end face plugging device are provided with seal groove, are provided with rectangle combined seal ring 14 in the described seal groove; Be provided with spring base 15 in addition between described spring 6 and described spool 1 head, the upper end of described spring 6 is against the lower surface of described spring base 15, described spool 1 head forms hemisphere, form the conical bore that inserts for the hemisphere of described spool 1 head on the upper surface of described spring base 15, and the lower surface of described spring base 15 is provided with an air vent and communicates with described conical bore; The lower end of described spring 6 props up the upper surface of a voltage regulation screw 16, be provided with pad 17 between described spring 6 and the described voltage regulation screw 16, the inwall of the lower end of described housing 4 is provided with the internal thread that matches with external screw thread on the described voltage regulation screw 16, described voltage regulation screw 16 sidewalls are provided with pin-and-hole, the relevant position of described valve casing is provided with the hole, one resilient key 18 inserts described hole and described pin-and-hole is interior with described voltage regulation screw 16 spacing fixing, and also is provided with exhaust hole on the end face of described voltage regulation screw 16.
As shown in Figure 2, in embodiment two, described end face plugging device is distance cover 10 and piles up the middle base 11 that is arranged on the described distance cover 10, form on the outer wall of described middle base 11 with described tail end and insert the intercommunicating pore that the chamber communicates, described intercommunicating pore constitutes the inlet of described apocenosis passage 5.Described linkage is the snap joint 12 that insertion end is cartridge type, form external screw thread on the outer wall of described snap joint 12 insertion ends, described valve body 3 liquid feeding end end faces are formed with and are fit to the annular insertion chamber that described snap joint 12 is inserted, and form the internal thread that matches with described external screw thread on the relevant position of the inwall that the diameter that described annular is inserted the chamber is bigger.Described annular insert the chamber by the inwall of described valve body 3 liquid feeding ends and pile up the described distance cover 10 of one and the outer wall of described middle base 11 between the space formed, form the intermediate throughholes that communicates with the described intercommunicating pore of described middle base 11 on the relevant position of the outer wall of the insertion end of described snap joint 12, described intermediate throughholes constitutes the interlude of described apocenosis passage 5.
The course of work of safety valve of the present utility model:
Spool 1 tail end blind hole place communicates with the liquid road of system, when system liquid pressure is not more than the default biasing force of spring 6, spool 1 is in non-pressure release duty under the propping up of spring 6 and spring base 15, promptly keep outage 2 on the spool 1 to stagger with apocenosis passage 5 on the valve body 3 and be not communicated with;
When system pressure during greater than the default biasing force of spring 6, spool 1 backs down spring base 15 to lower slider under the effect of hydraulic coupling, because the position-limiting action of 7 pairs of spools 1 of defining flange is arranged, even when system pressure is a lot of greater than the default pressure of spring 6, can guarantee that also spool 1 does not penetrate valve body 3, when guaranteeing that spool 1 is in the pressure release duty, outage 2 on the outer wall always communicates with apocenosis passage 5 on the valve body 3, outage 2 is with after apocenosis passage 5 is communicated with, unloading carrier fluid discharges by apocenosis passage 5, directly be sprayed onto on the tubular protective jacket 13, just flow down, thereby realize pressure leak process along tubular protective jacket 13;
After stress-relief process finished, system pressure was reduced to and is not more than the biasing force that spring 6 is preset, at this moment, spring 6 restores to the original state, by spring base 15 spool 1 is upwards pushed up back, the outage 2 on the spool 1 is staggered with apocenosis passage 5 on the valve body 3, spool 1 returns to non-pressure release duty again.
Obviously, the foregoing description only is for example clearly is described, and is not the qualification to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give exhaustive to all embodiments.And conspicuous variation of being extended out thus or change still are among the protection domain of the utility model creation.
Claims (10)
1. a safety valve comprises
Spool (1), described spool (1) is the cylinder that tail end face is provided with the blind hole of axial direction, forms the outage (2) that communicates with described blind hole on the outer wall of described cylinder;
The valve body part, described valve body branch comprises valve body (3) that forms the inner chamber that described spool (1) is set and the housing (4) that supports described valve body (3), described inner chamber is fit to described spool (1) and in axial direction slidably reciprocates within it, form the apocenosis passage (5) that liquid feeding end communicates with described inner chamber on the relevant position of described valve body (3) outer wall, when described spool (1) is in non-pressure release duty, described outage (2) staggers with the position of described apocenosis passage (5), when described spool (1) was in the pressure release duty, described outage (2) communicated with described apocenosis passage (5);
Spring (6), described spring (6) is arranged in the described housing (4), and the upper end of described spring (6) props up the head of described spool (1), and described spring (6) has default biasing force, and makes described spool (1) be in non-pressure release duty;
It is characterized in that: described apocenosis passage (5) not with described housing (4) internal communication, directly communicate with described valve body portion of external.
2. safety valve according to claim 1, it is characterized in that: be provided with between described valve body (3) and the described spool (1) spacing stopping means is carried out in the slip of described spool (1) axial direction, described stopping means can be guaranteed when described spool (1) is in the pressure release duty, described outage (2) on the described spool (1) communicates with apocenosis passage (5) on the described valve body (3), when described spool (1) was in non-pressure release duty, the described outage (2) on the described spool (1) staggered with apocenosis passage (5) on the described valve body (3).
3. safety valve according to claim 2, it is characterized in that: described stopping means comprises the defining flange (7) that is arranged on described spool (1) outer wall, and on the relevant position of described valve body (3) internal chamber wall, form be suitable for the limit chamber (8) that described defining flange (7) in axial direction slides within it, described limit chamber (8) has described defining flange (7) is carried out spacing upper limit platform of axial direction and lower limit platform, described lower limit platform is made of the stepped hole that is molded on described valve body (3) internal chamber wall, described upper limit platform is made of the end face plugging device of the open end of blocking described stepped hole that inner chamber on described valve body (3) inserts, and the tail end that place, described end face plugging device axle center forms the tail end insertion that is fit to described spool (1) inserts the chamber.
4. safety valve according to claim 3, it is characterized in that: described end face plugging device is screw plug (9), form external screw thread on the outer wall of the insertion end of described screw plug (9), form the internal thread that matches with described external screw thread on the relevant position of described valve body (3) internal chamber wall; Or described end face plugging device overlaps (10) and piles up the middle base (11) that is arranged on the described distance cover (10) for distance, form on the outer wall of described middle base (11) with described tail end and insert the intercommunicating pore that the chamber communicates, described intercommunicating pore constitutes the inlet of described apocenosis passage (5).
5. safety valve according to claim 4 is characterized in that: the liquid feeding end of described valve body (3) is provided with the linkage with extraneous pipeline connection in addition.
6. safety valve according to claim 5 is characterized in that: described linkage is for being arranged on the external screw thread on described valve body (3) the liquid feeding end outer wall.
7. safety valve according to claim 5, it is characterized in that: described linkage is the snap joint (12) that insertion end is cartridge type, form external screw thread on the outer wall of described snap joint (12) insertion end, described valve body (3) liquid feeding end end face is formed with and is fit to the annular insertion chamber that described snap joint (12) is inserted, and forms the internal thread that matches with described external screw thread on the relevant position of the inwall that the diameter that described annular is inserted the chamber is bigger.
8. safety valve according to claim 7, it is characterized in that: described annular insert the chamber by the inwall of described valve body (3) liquid feeding end and pile up the described distance cover (10) of one and the outer wall of described middle base (11) between the space formed, form the intermediate throughholes that communicates with the described intercommunicating pore of described middle base (11) on the relevant position of the outer wall of the insertion end of described snap joint (12), described intermediate throughholes constitutes the interlude of described apocenosis passage (5).
9. according to each described safety valve among the claim 1-8, it is characterized in that: the outer wall of described valve body (3) is provided with the tubular protective jacket (13) that unloads carrier fluid that blocks from the liquid outlet ejection of described apocenosis passage (5), has the gap between the inwall of described tubular protective jacket (13) and described valve body (3) outer wall.
10. according to each described safety valve among the claim 3-8, it is characterized in that: described limit chamber (8) constitutes the inlet of described apocenosis passage (5), the inwall of pairing described valve body (3) inwall in the upper and lower of the above outage of axial direction (2) and described apocenosis passage (5) and described end face plugging device is provided with seal groove, is provided with rectangle combined seal ring (14) in the described seal groove; Be provided with spring base (15) in addition between described spring (6) and described spool (1) head, the upper end of described spring (6) is against the lower surface of described spring base (15), described spool (1) head forms hemisphere, form the conical bore that the hemisphere for described spool (1) head inserts on the upper surface of described spring base (15), and the lower surface of described spring base (15) is provided with an air vent and communicates with described conical bore; The lower end of described spring (6) props up the upper surface of a voltage regulation screw (16), be provided with pad (17) between described spring (6) and the described voltage regulation screw (16), the inwall of the lower end of described housing (4) is provided with the internal thread that matches with external screw thread on the described voltage regulation screw (16), described voltage regulation screw (16) sidewall is provided with pin-and-hole, the relevant position of described valve casing is provided with the hole, one resilient key (18) inserts in described hole and the described pin-and-hole described voltage regulation screw (16) is spacing fixing, also is provided with exhaust hole on the end face of described voltage regulation screw (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202794503U CN201521309U (en) | 2009-11-17 | 2009-11-17 | Safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202794503U CN201521309U (en) | 2009-11-17 | 2009-11-17 | Safety valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201521309U true CN201521309U (en) | 2010-07-07 |
Family
ID=42507486
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202794503U Expired - Lifetime CN201521309U (en) | 2009-11-17 | 2009-11-17 | Safety valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201521309U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102168569A (en) * | 2011-04-08 | 2011-08-31 | 巨隆集团芜湖兴隆液压有限公司 | High-flow safety valve |
| CN103410537A (en) * | 2013-08-20 | 2013-11-27 | 深圳市神拓机电设备有限公司 | Safety valve |
| CN104235446A (en) * | 2014-08-01 | 2014-12-24 | 北京天地玛珂电液控制系统有限公司 | Safety valve with pressure compensation function |
| CN104235446B (en) * | 2014-08-01 | 2017-01-04 | 北京天地玛珂电液控制系统有限公司 | A kind of relief valve with pressure compensation |
| CN109114269A (en) * | 2018-10-23 | 2019-01-01 | 湖南机油泵股份有限公司 | A kind of compact-sized safety valve and lubricating oil pump |
| CN109915634A (en) * | 2019-04-24 | 2019-06-21 | 中航光电科技股份有限公司 | Crimp head is unloaded with handoff functionality |
| CN111219382A (en) * | 2019-10-29 | 2020-06-02 | 北京天地玛珂电液控制系统有限公司 | High-flow safety valve for aqueous medium mine |
-
2009
- 2009-11-17 CN CN2009202794503U patent/CN201521309U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102168569A (en) * | 2011-04-08 | 2011-08-31 | 巨隆集团芜湖兴隆液压有限公司 | High-flow safety valve |
| CN103410537A (en) * | 2013-08-20 | 2013-11-27 | 深圳市神拓机电设备有限公司 | Safety valve |
| CN104235446A (en) * | 2014-08-01 | 2014-12-24 | 北京天地玛珂电液控制系统有限公司 | Safety valve with pressure compensation function |
| CN104235446B (en) * | 2014-08-01 | 2017-01-04 | 北京天地玛珂电液控制系统有限公司 | A kind of relief valve with pressure compensation |
| CN109114269A (en) * | 2018-10-23 | 2019-01-01 | 湖南机油泵股份有限公司 | A kind of compact-sized safety valve and lubricating oil pump |
| CN109915634A (en) * | 2019-04-24 | 2019-06-21 | 中航光电科技股份有限公司 | Crimp head is unloaded with handoff functionality |
| CN109915634B (en) * | 2019-04-24 | 2020-01-17 | 中航光电科技股份有限公司 | Pressure relief connector with switching function |
| CN111219382A (en) * | 2019-10-29 | 2020-06-02 | 北京天地玛珂电液控制系统有限公司 | High-flow safety valve for aqueous medium mine |
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Assignee: Valve Machinery Group Co., Ltd. Assignor: Anhui Fan'er Electrohydraulic Technology Co., Ltd. Contract record no.: 2012340000393 Denomination of utility model: Process for making U-shape matching box of gas safety valve Granted publication date: 20100707 License type: Exclusive License Record date: 20121231 |
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