CN204664519U - Normally closed type gas emergency cut-off valve - Google Patents
Normally closed type gas emergency cut-off valve Download PDFInfo
- Publication number
- CN204664519U CN204664519U CN201520254030.5U CN201520254030U CN204664519U CN 204664519 U CN204664519 U CN 204664519U CN 201520254030 U CN201520254030 U CN 201520254030U CN 204664519 U CN204664519 U CN 204664519U
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- push rod
- valve
- conduit
- piston
- normally closed
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Abstract
The utility model relates to a kind of Normally closed type gas emergency cut-off valve, comprise valve body, valve gap, one is threaded without magnetic tube in the center hole of valve gap, coil assembly is surrounded with without on the outer tube wall of magnetic tube, one fixed core is fixedly mounted in the pore without magnetic tube, one dynamic iron core is slidably fitted in the pore without magnetic tube, the lower end of dynamic iron core extends in valve body, be fixedly connected with a piston, be provided with a piston reset spring between piston and valve gap, the lower end surface of this piston is provided with the sealing gasket contacted with sealing valve port face; The bottom of valve body is provided with a conduit, be slidably matched in the pore of conduit a push rod, conduit is extended in the upper end of this push rod, spacing is left between push rod upper end and piston, conduit is stretched out outside the lower end of this push rod, the bottom cover of push rod has push rod Returnning spring, and push rod Returnning spring is between push rod lower end and conduit.The utility model can realize fast quick-closing valve automatically when urgency power-off, and can only Non-follow control valve opening again.
Description
Technical field
The utility model relates to solenoid valve market, particularly a kind of Normally closed type gas emergency cut-off valve.
Background technique
For guarantee safety, the pipeline of conveying flammable explosive gas must install Emergeny Cutoff Valves, when meeting with emergency episode, energy closing duct in time, spreads to avoid Accidents Disasters.The hand off valve generally used at present, need manual operation, hand off valve in case of emergency cannot quick closedown, Field Force also may because of mal-condition cannot near cut-off valve, cause hand off valve cannot closing duct in time, the object of emergency cut-off pipeline cannot be played; Be arranged on automatic stop valve on pipeline when emergency episode occurs, closing duct can reach the object cutting off source of the gas in time after power-off, but after the coil of cut-off valve surprisingly charges, automatic stop valve will be opened automatically, flammable explosive gas may be caused to leak, accidents caused disaster.
Summary of the invention
The purpose of this utility model is for the deficiencies in the prior art, provides a kind of Normally closed type gas emergency cut-off valve, can realize fast quick-closing valve automatically when urgency power-off, and can only Non-follow control valve opening again.
The technical solution of the utility model is: a kind of Normally closed type gas emergency cut-off valve, comprise valve body, valve gap, valve gap is fastened on valve body upper end, be threaded in the center hole of described valve gap one vertical without magnetic tube, coil assembly is surrounded with without on the outer tube wall of magnetic tube, one fixed core is fixedly mounted in the pore without magnetic tube, one dynamic iron core is slidably fitted in the pore without magnetic tube, dynamic iron core is positioned at below fixed core, move and between iron core and fixed core, leave adhesive stroke gap, the lower end of described dynamic iron core extends in valve body through valve gap, be fixedly connected with for the piston of closing with open valve port with one, a piston reset spring is provided with between described piston and valve gap, the lower end surface of this piston is provided with the sealing gasket contacted with sealing valve port face, the bottom of described valve body is provided with the vertical conduit that runs through valve body wall, be slidably matched in the pore of described conduit a push rod, conduit is extended in the upper end of this push rod, spacing is left between push rod upper end and piston, conduit is stretched out outside the lower end of this push rod, the bottom cover of described push rod has push rod Returnning spring, and described push rod Returnning spring is between push rod lower end and conduit.
The lower end surface of described dynamic iron core is fixed with a vertical screw rod down, and the middle part kink of piston on screw rod, and passes through nut axial restraint.
The span of 1 ~ 5mm is left in the upper end of described push rod and the lower end of screw rod.
Described sealing gasket is embedded on the lower end surface of piston, and the inner circle part of sealing pad is fixed by a pressing plate, and the excircle part of sealing pad and the sealing surface of valve port are close to.
The lower end of described conduit is provided with one for the protective housing of push rod of screening by screw thread.
Described valve gap is fixed on valve body by valve gap clamping bolt, is provided with seal ring between valve gap and valve body.
The lower end of described push rod is provided with flange, and described conduit pore is shoulder hole, between the hole of flange and conduit that push rod Returnning spring is arranged on push rod is takeed on.
The bar section that described push rod is positioned at catheter tube hole path section is provided with two seal rings.
Adopt technique scheme: a kind of Normally closed type gas emergency cut-off valve, comprises valve body, valve gap, and valve gap is fastened on valve body upper end, the common shell forming cut-off valve.Be threaded in the center hole of described valve gap one vertical without magnetic tube, coil assembly is surrounded with without on the outer tube wall of magnetic tube, one fixed core is fixedly mounted in the pore without magnetic tube, one dynamic iron core is slidably fitted in the pore without magnetic tube, dynamic iron core is positioned at below fixed core, move and between iron core and fixed core, leave adhesive stroke gap, the lower end of described dynamic iron core extends in valve body through valve gap, be fixedly connected with for the piston of closing with open valve port with one, a piston reset spring is provided with between described piston and valve gap, the lower end surface of this piston is provided with the sealing gasket contacted with sealing valve port face, when coil is charged, fixed core is by magnetic force and dynamic iron core adhesive, the piston be now connected with dynamic iron core does not contact with the sealing surface of valve port, cut-off valve is in opening state, combustion gas can pass through cut-off valve smoothly, when meeting with emergency episode, power supply is cut off, coil is not charged, magnetic force is not had between fixed core and dynamic iron core, dynamic iron core is under the active force of gravity and piston reset spring, move down, piston contacts with the sealing surface of valve port, cut-off valve is in closed condition, combustion gas cannot pass through cut-off valve, achieve the object in case of emergency automatically cutting off source of the gas, Accidents Disasters is avoided to spread.The bottom of described valve body is provided with the vertical conduit that runs through valve body wall, be slidably matched in the pore of described conduit a push rod, conduit is extended in the upper end of this push rod, spacing is left between push rod upper end and piston, conduit is stretched out outside the lower end of this push rod, the bottom cover of described push rod has push rod Returnning spring, described push rod Returnning spring is between push rod lower end and conduit, when cut-off valve is after power-off is closed, even if coil charges again, fixed core recovers magnetic force, this magnetic force is less than the gravity of dynamic iron core and the elastic force of piston reset spring to the attraction force that dynamic iron core produces, dynamic iron core cannot up move, cut-off valve can not surprisingly be opened, after dangerous situation is got rid of, when needing again to open cut-off valve, upwardly push rod manually, by piston up jack-up, drive the up mobile and fixed core adhesive of dynamic iron core, realize manually opened cut-off valve, ensure gas safe, prevent cut-off valve from surprisingly opening.
The lower end surface of described dynamic iron core is fixed with a vertical screw rod down, the middle part kink of piston is on screw rod, and by nut axial restraint, the span of 1 ~ 5mm is left in the upper end of described push rod and the lower end of screw rod, when cut-off valve is in closed condition, push rod and screw rod disengage, the close together between the upper end of push rod and the lower end of screw rod, when cut-off valve opened by needs, push rod moves comparatively short stroke and can make iron core and fixed core adhesive.
The lower end of described conduit is provided with one for the protective housing of push rod of screening by screw thread, if when needing manually opened cut-off valve, could promote push rod after need screwing off protective housing, prevents push rod from being promoted by accident and opening cut-off valve.
Be further described below in conjunction with the drawings and specific embodiments.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
In accompanying drawing, 1 is valve body, and 2 is valve gap, and 3 is without magnetic tube, 4 is coil assembly, and 5 is fixed core, and 6 is dynamic iron core, 7 is valve port, and 8 is piston, and 9 is piston reset spring, 10 is conduit, and 11 is push rod, and 12 is flange, 13 is push rod Returnning spring, and 14 is screw rod, and 15 is nut, 16 is protective housing, and 17 is sealing gasket, and 18 is pressing plate.
Embodiment
See Fig. 1, it is a kind of specific embodiment of Normally closed type gas emergency cut-off valve.Normally closed type gas emergency cut-off valve comprises valve body 1, valve gap 2, valve gap 2 is fastened on valve body 1 upper end, and in the present embodiment, valve gap 2 is fixed on valve body 1 by valve gap clamping bolt, valve gap and valve body form the shell of cut-off valve jointly, are provided with seal ring between valve gap 2 and valve body 1.Be threaded in the center hole of described valve gap 2 one vertical without magnetic tube 3, the outer tube wall without magnetic tube 3 be surrounded with coil assembly 4.One fixed core 5 is fixedly mounted in the pore without magnetic tube 3, be positioned at the top without magnetic tube pore, one dynamic iron core 6 is slidably fitted in the pore without magnetic tube 3, dynamic iron core 6 is positioned at below fixed core 5, move and between iron core 6 and fixed core 5, leave adhesive stroke gap, the lower end of described dynamic iron core 6 extends in valve body 1 through valve gap 2, be fixedly connected with for the piston 8 of closing with open valve port 7 with one, in the present embodiment, the lower end surface of described dynamic iron core 6 is provided with tapped hole, the threaded upper ends of one screw rod 14 is engaged in tapped hole, be fixedly connected with dynamic iron core, the middle part kink of piston 8 is on screw rod 14, one nut thread is engaged in the lower end of screw rod, to piston axially locating.A piston reset spring 9 is provided with between described piston 8 and valve gap 2, the lower end surface of this piston 8 is provided with the sealing gasket 17 contacted with valve port 7 sealing surface, sealing pad is embedded on the lower end surface of piston 8, the inner circle part of sealing pad is fixed by a pressing plate 18, and the excircle part of sealing pad and the sealing surface of valve port 7 are close to.The bottom of described valve body 1 is provided with the vertical conduit 10 that runs through valve body wall, be slidably matched in the pore of described conduit 10 push rod 11, conduit 10 is extended in the upper end of this push rod 11, spacing is left between push rod upper end and piston 8, in the present embodiment, the span of 3mm is left in the lower end of push rod upper end and screw rod 14, conduit 10 is stretched out outside the lower end of this push rod 11, the bottom cover of described push rod 10 has push rod Returnning spring 13, described push rod Returnning spring 13 is between push rod 11 lower end and conduit 10, in the present embodiment, the lower end of described push rod 11 is provided with flange 12, described conduit 10 pore is shoulder hole, between the hole of flange 12 and conduit 10 that push rod Returnning spring 13 is arranged on push rod 11 is takeed on.The lower end of conduit 10 is provided with one for the protective housing 16 of push rod 11 of screening by screw thread, and the bar section that described push rod 11 is positioned at conduit 10 pore path section is provided with two seal rings.
The utility model in the course of the work, when needs combustion gas by time, the coil of cut-off valve is charged, dynamic iron core and fixed core adhesive, the sealing surface of piston disengaging valve port, and cut-off valve is in opening state, and combustion gas is passed through smoothly; When needing timely closing duct when meeting with emergency episode, power supply is cut off, the coil of cut-off valve is not charged, do not have magnetic attraction between fixed core and dynamic iron core, dynamic iron core, under the active force of gravity and piston reset spring, moves down, piston is driven to contact with the sealing surface of valve port, cut-off valve is in closed condition, combustion gas not by, avoid Accidents Disasters to spread.When dangerous situation is got rid of, when needing again valve opening, coil is charged, manually screws off protective housing, with hand upwards jack-up push rod, after making push rod will move iron core jack-up and fixed core adhesive, unclamp push rod, push rod resets, and the piston be connected with dynamic iron core departs from the sealing surface of valve port, cut-off valve is in opening state, and combustion gas can be passed through smoothly.
Claims (8)
1. a Normally closed type gas emergency cut-off valve, comprise valve body (1), valve gap (2), valve gap (2) is fastened on valve body (1) upper end, it is characterized in that: be threaded in the center hole of described valve gap (2) one vertical without magnetic tube (3), outer tube wall without magnetic tube (3) is surrounded with coil assembly (4), one fixed core (5) is fixedly mounted in the pore without magnetic tube (3), one dynamic iron core (6) is slidably fitted in the pore without magnetic tube (3), dynamic iron core (6) is positioned at fixed core (5) below, move and leave adhesive stroke gap between iron core (6) and fixed core (5), the lower end of described dynamic iron core (6) extends in valve body (1) through valve gap (2), be fixedly connected with for the piston of closing with open valve port (7) (8) with one, a piston reset spring (9) is provided with between described piston (8) and valve gap (2), the lower end surface of this piston (8) is provided with the sealing gasket (17) contacted with valve port (7) sealing surface, the bottom of described valve body (1) is provided with the vertical conduit (10) that runs through valve body wall, be slidably matched in the pore of described conduit (10) push rod (11), conduit (10) is extended in the upper end of this push rod (11), spacing is left between push rod upper end and piston (8), conduit (10) is stretched out outside the lower end of this push rod (11), the bottom cover of described push rod (10) has push rod Returnning spring (13), and described push rod Returnning spring (13) is positioned between push rod (11) lower end and conduit (10).
2. Normally closed type gas emergency cut-off valve according to claim 1, it is characterized in that: the lower end surface of described dynamic iron core (6) is fixed with a vertical screw rod (14) down, the middle part kink of piston (8) on screw rod (14), and passes through nut (15) axial restraint.
3. Normally closed type gas emergency cut-off valve according to claim 2, is characterized in that: the span of 1 ~ 5mm is left in the upper end of described push rod (11) and the lower end of screw rod (14).
4. Normally closed type gas emergency cut-off valve according to claim 1, it is characterized in that: described sealing gasket (17) is embedded on the lower end surface of piston (8), the inner circle part of sealing pad is fixed by a pressing plate (18), and the sealing surface of the excircle part of sealing pad and valve port (7) is close to.
5. Normally closed type gas emergency cut-off valve according to claim 1, is characterized in that: the lower end of described conduit (10) is provided with one for the protective housing (16) of push rod of screening (11) by screw thread.
6. Normally closed type gas emergency cut-off valve according to claim 1, is characterized in that: described valve gap (2) is fixed on valve body (1) by valve gap clamping bolt, is provided with seal ring between valve gap (2) and valve body (1).
7. Normally closed type gas emergency cut-off valve according to claim 1, it is characterized in that: the lower end of described push rod (11) is provided with flange (12), described conduit (10) pore is shoulder hole, between the hole of flange (12) and conduit (10) that push rod Returnning spring (13) is arranged on push rod (11) is takeed on.
8. Normally closed type gas emergency cut-off valve according to claim 7, is characterized in that: the bar section that described push rod (11) is positioned at conduit (10) pore path section is provided with two seal rings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520254030.5U CN204664519U (en) | 2015-04-24 | 2015-04-24 | Normally closed type gas emergency cut-off valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520254030.5U CN204664519U (en) | 2015-04-24 | 2015-04-24 | Normally closed type gas emergency cut-off valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204664519U true CN204664519U (en) | 2015-09-23 |
Family
ID=54134902
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520254030.5U Expired - Fee Related CN204664519U (en) | 2015-04-24 | 2015-04-24 | Normally closed type gas emergency cut-off valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204664519U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107420552A (en) * | 2017-05-02 | 2017-12-01 | 华北电力大学 | A kind of passive valve |
| CN114382929A (en) * | 2021-11-12 | 2022-04-22 | 上海线友电子有限公司 | Intelligent electromagnetic type gas emergency cut-off valve |
-
2015
- 2015-04-24 CN CN201520254030.5U patent/CN204664519U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107420552A (en) * | 2017-05-02 | 2017-12-01 | 华北电力大学 | A kind of passive valve |
| CN114382929A (en) * | 2021-11-12 | 2022-04-22 | 上海线友电子有限公司 | Intelligent electromagnetic type gas emergency cut-off valve |
| CN114382929B (en) * | 2021-11-12 | 2023-12-12 | 上海线友电子有限公司 | Intelligent electromagnetic gas emergency cut-off valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150923 Termination date: 20160424 |