CN201196280Y - Cutting valve of gas pressure regulator - Google Patents
Cutting valve of gas pressure regulator Download PDFInfo
- Publication number
- CN201196280Y CN201196280Y CNU2008200355282U CN200820035528U CN201196280Y CN 201196280 Y CN201196280 Y CN 201196280Y CN U2008200355282 U CNU2008200355282 U CN U2008200355282U CN 200820035528 U CN200820035528 U CN 200820035528U CN 201196280 Y CN201196280 Y CN 201196280Y
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- Prior art keywords
- connecting shaft
- spring
- nut
- cut
- screw rod
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- Expired - Fee Related
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Abstract
The utility model relates to a cutoff valve for fuel gas pressure regulators, which can automatically cut off under the conditions of overpressure and underpressure. The cutoff valve comprises a shell, a cutoff leather diaphragm, a tray, a pressure regulation mechanism and a cutoff drive mechanism; the pressure regulation mechanism comprises a nut sleeve piece, an overpressure spring, a hollow stud and an underpressure spring; the overpressure spring is elastically arranged between the lower end part of the nut sleeve piece and a screw cap at the upper end of the overpressure spring; the underpressure spring is elastically arranged between the lower end of the hollow stud and a spring seat on a screw; a nut is arranged below the spring seat on the screw; the outer diameter of the nut is larger than the inner diameter of the nut sleeve piece; the cutoff drive mechanism comprises a connecting shaft, a cutoff spring, a cutoff valve pad and a limiting control mechanism of the connecting shaft; a limiting groove is arranged on the connecting shaft; the limiting control mechanism of the connecting shaft limits the connecting shaft through the limiting groove; and the bottom of the screw is in drive connection with the limiting control mechanism of the connecting shaft. When the screw moves up or down because of overpressure or underpressure, the limiting groove breaks away from the limiting control mechanism of the connecting shaft, and the connecting shaft moves forwards and completes cutoff motions under the action of the cutoff spring.
Description
Technical field
The utility model relates to a kind of city gas transmission pipeline network safety corollary equipment that belongs to, and is specifically related to a kind of cut-off valve of gas pressure regulator, governor.
Background technique
At present, gas pressure regulator, governor is widely used on the city gas conveyance conduit.
Chinese patent literature notification number CN2432411 discloses a kind of gas pressure regulator, governor, and the valve body of pressure governor adopts the header structure, in establish valve seat and valve port; Wherein safety cut-off valve and main pressure regulator valve are connected on the same header; Main voltage regulator adopts the lever form to connect the horizontal type structure of valve port with horizontal valve rod; Safety cut-off valve adopts the pin that links to each other with the top cover to block the cut-out stem structure.
Above-mentioned the deficiencies in the prior art part is: existing safety cut-off valve often only has the function that overvoltage is cut off, and can not realize under-voltage function.
The model utility content
Technical problem to be solved in the utility model provides the cut-off valve that has a kind of gas pressure regulator, governor of function of automatically cutting off under overvoltage or undervoltage condition.
For solving the problems of the technologies described above, the utility model provides a kind of cut-off valve of gas pressure regulator, governor, comprising: upper shell and lower shell body; Be provided with the cut-out epithelium between the upper and lower casing, cut off epithelium and be provided with pallet; The top of pallet is provided with pressure-regulating device, and pressure-regulating device comprises screw rod, and the lower end of screw rod is sealedly and fixedly connected with the center through hole of cutting off epithelium and pallet, and the lower end of screw rod is provided with the cut-out driving mechanism; On the wall of lower shell body, be provided with the PRESSURE PIPE interface; The central vertical of upper shell is provided with tube, and described screw rod extends in this tube; Described cut-out driving mechanism comprises: connecting shaft, the cut-out spring that is connected with connecting shaft elasticity, the cut-out valve pad of being located at the connecting shaft front end and the spacing control mechanism of connecting shaft; Connecting shaft is provided with restraining groove, and the spacing control mechanism of described connecting shaft is by the spacing connecting shaft of this restraining groove; Be characterized in: described pressure-regulating device also comprises: be located in the tube and by center through hole be placed in the inverted T-shape on the screw rod the nut external member, be placed in superpressure spring on the nut external member, be placed on the screw rod and the hollow stud that is threaded with the center through hole of nut external member, be located at the nut external member center through hole in under-voltage spring; Underpart in the described tube is provided with boss, and the nut external member is located on this boss; The top of described superpressure spring is provided with nut, and nut is placed on the nut sleeve part and with the inner thread of tube and is connected; The superpressure spring is arranged between nut external member underpart and the described nut; Screw rod is provided with spring seat, and described under-voltage spring is arranged between hollow stud lower end and this spring seat; Be provided with nut below the above spring seat of screw rod, the external diameter of nut is greater than the internal diameter of described nut external member; The spacing control mechanism of the bottom of described screw rod and connecting shaft is in transmission connection, when on the bottom of screw rod, moving or moving down, restraining groove on the described connecting shaft is broken away from the spacing control mechanism of described connecting shaft, and connecting shaft moves forward under the effect of cutting off spring, the cut-out valve pad is finished cut off action.
The spacing control mechanism of described connecting shaft comprises: the equalizer pulley assembly of being located at the screw rod lower end, slide bar, front and back are sheathed on the sealing bolt on the connecting shaft, spacing briquetting and sliding sleeve successively, and elasticity is connected in the extension spring of spacing briquetting rear end, and is located at the steel ball between spacing briquetting and the sealing bolt; Described equalizer pulley assembly comprises: an end is fixed in swing arm on the lower shell body inwall, be located at the drive wheel of swing arm central authorities, be located at the positioning wheel of the swing arm the other end and be located at balance spring on the inner walls; Drive wheel is located between balance spring top and the described screw rod bottom simultaneously; Described slide bar elasticity is hinged on the housing, and the upper end of slide bar has lug boss; Described sliding sleeve is provided with limited ring groove, and the lower end of slide bar is located on the side of this limited ring groove, and lug boss on the described slide bar and described positioning wheel Elastic Contact.
The rearward end of described connecting shaft is extended lower shell body, is with the sealing nut that links to each other with the lower shell body sealing on the rearward end of connecting shaft, and connecting shaft and sealing nut sealing flexibly connect.
The rear end of described connecting shaft is provided with bolt part, and described sealing nut is provided with helps pull a cart, and the rear end of helping pull a cart is provided with the tapped hole that matches with the bolt part of described connecting shaft.
The front end of described connecting shaft extends lower shell body, and cover is useful on the joint that links to each other with the valve body of gas pressure regulator, governor on the front end of connecting shaft, and joint links to each other with the lower shell body sealing, and joint and connecting shaft sealing flexibly connect.
The utlity model has positive effect: (1) cut-off valve of the present utility model in use, cut-off valve is located at valve port one side of the valve body of gas pressure regulator, governor, the cut-out valve pad of cut-off valve and the valve port of valve body are oppositely arranged, the PRESSURE PIPE interface of cut-off valve is provided with built-in PRESSURE PIPE, and this built-in PRESSURE PIPE communicates with valve outlet.When overvoltage or undervoltage condition appear in the air pressure of valve outlet, cut-out epithelium in the cut-off valve moves up or down, cause moving on the screw rod or moving down, make the screw rod restraining groove break away from the spacing control mechanism of connecting shaft, connecting shaft moves forward under the effect of cutting off spring simultaneously, cut off the valve port that valve pad is sealed valve body thereby make, promptly finish and cut off action.Wherein, overvoltage or under-voltage threshold values are controlled by superpressure spring or under-voltage spring.(2) in the cut-off valve of the present utility model, be provided with nut below the spring seat on the screw rod, the external diameter of nut is greater than the internal diameter of described nut external member; Thereby, when under overpressure situation, moving on the screw rod, move by nut picking-up nut sleeve part and together, break away from the spacing control mechanism of connecting shaft until described screw rod restraining groove.Under-voltage spring is located between the spring seat on hollow stud lower end and the screw rod, because hollow stud and screw rod are for flexibly connecting, therefore under undervoltage condition, screw rod be subjected to under-voltage spring downward direction elastic force and move down, break away from the spacing control mechanism of connecting shaft until described screw rod restraining groove; (3) in the spacing control mechanism of the connecting shaft of cut-off valve of the present utility model, when on screw rod, moving or moving down, cause positioning wheel and the dislocation of the lug boss on the slide bar in the equalizer pulley assembly, under the effect of cutting off spring, steel ball breaks away from restraining groove, and makes the connecting shaft reach, and the lower end that makes slide bar breaks away from the limited ring groove on the sliding sleeve, make sliding sleeve to the rear side end displacement simultaneously, spacing briquetting also to the rear side end displacement, makes the cut-out valve pad finish at last and cuts off action under the effect of extension spring.(4) in the cut-off valve of the present utility model, the rearward end of connecting shaft is extended lower shell body, and the rear end of connecting shaft is provided with bolt part, and sealing nut is provided with helps pull a cart, and the rear end of helping pull a cart is provided with the tapped hole that matches with the bolt part of described connecting shaft, so that reset operation.
Description of drawings
Fig. 1 is the cross-sectional view of embodiment 1 gas pressure regulator, governor.
Fig. 2 is that the A of Fig. 1 is to view.
Fig. 3 is the cross-sectional view of cut-off valve in embodiment 1 the gas pressure regulator, governor.
Each label is respectively among the figure:
The 1--main pressure regulator valve, 2--valve body, 2-1--valve port, 2-2--valve body inlet, the 2-3--valve outlet, 3--cut-off valve, 3-1--joint, 4--master's epithelium, the 5--master tray, the built-in PRESSURE PIPE of 6--, the built-in valve that diffuses of 7--, 8--pressure exerting arrangement, the 9--piston drive, 10--screw rod, 13--lever, 14--PRESSURE PIPE interface, the 18--valve rod, 20--pressure regulation valve pad, 30--pulley assembly, 30-1--positioning roller, the 30-2--drive wheel, 30-3--swing arm, 31--upper shell, 32--lower shell body, the 33--screw rod, the 33-1--spring seat, 34--cuts off epithelium, the 35--pallet, 36--PRESSURE PIPE interface, 37--superpressure spring, the 38--balance spring, 39 cut off valve pad, 40--slide bar, the 41--sliding sleeve, 41-1--restraining groove, 42--connecting shaft, the 42-1--bolt part, 43--cuts off spring, 44--steel ball, 45--helps pull a cart, 46--nut, the female external member of spiral shell 47--, the under-voltage spring of 48--, 49--sealing bolt, 50--sealing nut, the 51--extension spring, the spacing briquetting of 52--, 53--nut.
Embodiment
(embodiment 1)
See Fig. 1-3, gas pressure regulator, governor of the present utility model comprises: valve body 2, valve port 2-1 one side of being located at valve body 2 and the main pressure regulator valve 1 that links to each other with valve body 2 and the cut-off valve 3 of being located at valve port 2-1 opposite side and linking to each other with valve body 2.
In the cut-off valve 3 of present embodiment, be provided with between upper shell 31 and the lower shell body 32 and cut off epithelium 34, cut off epithelium 34 and be provided with pallet 35; The top of pallet 35 is provided with pressure-regulating device.
Pressure-regulating device comprises: screw rod 33, and the lower end of screw rod 33 is sealedly and fixedly connected with the center through hole of cutting off epithelium 34 and pallet 35, and the lower end of screw rod 33 is provided with the cut-out driving mechanism; On the wall of lower shell body 32, be provided with PRESSURE PIPE interface 36; The central vertical of upper shell 31 is provided with tube 31-1, and described screw rod 33 extends in this tube 31-1.
Described cut-out driving mechanism comprises: connecting shaft 42, the cut-out spring 43 that is connected with connecting shaft 42 elasticity, the cut-out valve pad 39 of being located at connecting shaft 42 front ends and the spacing control mechanism of connecting shaft; Connecting shaft 42 is provided with restraining groove 41-1, and the spacing control mechanism of described connecting shaft is by the spacing connecting shaft 42 of this restraining groove 41-1.
Described pressure-regulating device also comprises: be located in the tube 31-1 and by center through hole be placed in the inverted T-shape on the screw rod 33 nut external member 47, be placed in superpressure spring 37 on the nut external member 47, be placed on the screw rod 33 and the hollow stud 54 that is threaded with the center through hole of nut external member 47, be located at nut external member 47 center through hole in under-voltage spring 48; Underpart in the described tube 31-1 is provided with boss 31-2, and nut external member 47 is located on this boss 31-2; The top of described superpressure spring 37 is provided with nut 53, and nut 53 is placed on the nut external member 47 and with the inner thread of tube 31-1 and is connected; Superpressure spring 37 is flexibly set between nut external member 47 underparts and the described nut 53; Screw rod 33 is provided with spring seat 33-1, and described under-voltage spring 48 is flexibly set between hollow stud 54 lower ends and this spring seat; Be provided with nut 46 below screw rod 33 the above spring seat, the external diameter of nut 46 is greater than the internal diameter of the center through hole of described nut external member 47; The spacing control mechanism of the bottom of described screw rod 33 and connecting shaft is in transmission connection, when on the bottom of screw rod 33, moving or moving down, restraining groove 41-1 on the described connecting shaft 42 breaks away from the spacing control mechanism of described connecting shaft, and connecting shaft 42 moves forward under the effect of cutting off spring 43, cut-out valve pad 39 is finished cut off action.
The spacing control mechanism of described connecting shaft comprises: the equalizer pulley assembly 30 of being located at screw rod 33 lower ends, slide bar 40, front and back are sheathed on sealing bolt 49, spacing briquetting 52 and the sliding sleeve 41 on the connecting shaft 42 successively, elasticity is connected in the extension spring 51 of spacing briquetting 52 rear ends, and is located at the steel ball 44 between spacing briquetting 52 and the sealing bolt 49; Described equalizer pulley assembly 30 comprises: an end is fixed in swing arm 30-3 on lower shell body 32 inwalls, be located at the drive wheel 30-2 of swing arm 30-3 central authorities, be located at the positioning wheel 30-1 of the swing arm 30-3 the other end and be located at balance spring 38 on housing 32 inwalls; Drive wheel 30-2 is located between balance spring 38 tops and described screw rod 33 bottoms simultaneously; Described slide bar 40 elasticity are hinged on the housing 32, and the upper end of slide bar 40 has lug boss; Described sliding sleeve 41 is provided with limited ring groove 41-1, and the lower end of slide bar 40 is located on the side of this limited ring groove 41-1, and lug boss on the described slide bar 40 and described positioning wheel 30-1 Elastic Contact.
The rearward end of described connecting shaft 42 is extended lower shell body 32, is with the sealing nut 50 that links to each other with lower shell body 32 sealings on the rearward end of connecting shaft 42, and connecting shaft 42 flexibly connects with sealing nut 50 sealings.
The rear end of described connecting shaft 42 is provided with bolt part 42-1, and described sealing nut 50 is provided with helps pull a cart 45, and 45 the rear end of helping pull a cart is provided with the tapped hole 45-1 that matches with the bolt part 42-1 of described connecting shaft 42.
The front end of described connecting shaft 42 extends lower shell body 32, and cover is useful on the joint 3-1 that links to each other with the valve body 2 of gas pressure regulator, governor 1 on the front end of connecting shaft 42, and joint 3-1 links to each other with lower shell body 32 sealings, and joint 3-1 and connecting shaft 42 sealings flexibly connect.Described cut-out spring 43 is located in the joint 3-1.
See Fig. 2-3, the air pressure signal of valve outlet 2-3 is transmitted to cut-out epithelium 34 bottoms of cut-off valve through PRESSURE PIPE interface 36, and this gas pressure balances each other with the superpressure spring 37 that cuts off epithelium 34 tops, at this moment, cuts off valve pad 39 and is in opening state with valve port 2-1.
When the air pressure of valve outlet 2-3 changes, as pressure rises reach superpressure spring 37 the operating pressure value is set the time, pressure balance is broken, cutting off epithelium 34 drive screw rods 33 moves under the situation of the active force that overcomes superpressure spring 37, positioning roller 30-1 moves under the effect of balance spring 38, itself and equilibrium block 40 break away from, equilibrium block 40 is loosening, sliding sleeve 41 is loosening thereupon, connecting shaft 42 moves forward under the effect of cutting off spring 43, and steel ball 44 discharges, and connecting shaft 42 promotes to cut off valve pad 39 sealing valve port 2-1, cut off air-flow, reach the purpose of safety cut-off.
Equally, as the air pressure of valve outlet 2-3 descend reach under-voltage spring 48 the operating pressure value is set the time, pressure balance is broken, and cuts off epithelium 34 and drives screw rods 33 and move down under the effect of under-voltage spring 48, positioning roller 30-1 moves down, itself and equilibrium block 40 break away from, and sliding sleeve 41 is loosening thereupon, and connecting shaft 42 moves forward under the effect of cutting off spring 43, steel ball 44 discharges, connecting shaft 42 promotes to cut off valve pad 39 sealing valve port 2-1, cuts off air-flow, reaches the purpose of safety cut-off.
After superpressure or under-voltage fault are got rid of, 45 tapped hole 45-1 matches with the bolt part 42-1 of connecting shaft 42 with helping pull a cart, help pull a cart 45 then, cut-off valve 3 is resetted, even the spacing control mechanism of connecting shaft, makes valve body 2 ventilations in the gas pressure regulator, governor by the spacing connecting shaft 42 of restraining groove 41-1 on the described connecting shaft 42.
Described main pressure regulator valve 1 comprises: housing 1-1, be located at the main epithelium 4 in the housing 1-1; Main epithelium 4 is provided with master tray 5, and master tray 5 upper ends are provided with pressure exerting arrangement 8 and the built-in valve 7 that diffuses.The lower end of the screw rod 10 that links to each other with main epithelium 4 vertical seal with master tray 5 is connected with piston drive 9, is used for the gap between the valve port 2-1 of the valve pad 20 of regulating piston driving mechanism 9 and valve body 2, with the air pressure at regulation valve body outlet 2-3 place.Housing 1-1 lower end surface is provided with PRESSURE PIPE interface 14, and PRESSURE PIPE interface 14 is provided with the built-in PRESSURE PIPE 6 that communicates with valve outlet 2-3.
Claims (5)
1. the cut-off valve of a gas pressure regulator, governor, it comprises: upper shell (31) and lower shell body (32); Be provided with between the upper and lower casing (31,32) and cut off epithelium (34), cut off epithelium (34) and be provided with pallet (35); The top of pallet (35) is provided with pressure-regulating device;
Pressure-regulating device comprises screw rod (33), and the lower end of screw rod (33) is sealedly and fixedly connected with the center through hole of cutting off epithelium (34) and pallet (35), and screw rod (33) lower end is connected with the cut-out driving mechanism; On the wall of lower shell body (32), be provided with PRESSURE PIPE interface (36);
Described cut-out driving mechanism comprises: connecting shaft (42), the cut-out spring (43) that is connected with connecting shaft (42) elasticity, the cut-out valve pad (39) of being located at connecting shaft (42) front end and the spacing control mechanism of connecting shaft; Connecting shaft (42) is provided with restraining groove (41-1), and the spacing control mechanism of described connecting shaft is by the spacing connecting shaft of this restraining groove (41-1) (42);
It is characterized in that: described pressure-regulating device also comprises: in the nut external member (47) that is placed in the inverted T-shape on the screw rod (33) of pallet (35) top, be placed in superpressure spring (37) on the nut external member (47), be placed in hollow stud (54) that screw rod (33) goes up and be threaded with the center through hole of nut external member (47), the under-voltage spring (48) in the center through hole of being located at nut external member (47); Underpart in the described tube (31-1) is provided with boss (31-2), and nut external member (47) is located on this boss (31-2); The top of described superpressure spring (37) is provided with nut (53), and nut (53) is placed in nut external member (47) and upward and with the inner thread of tube (31-1) is connected; Superpressure spring (37) is flexibly set between nut external member (47) underpart and the described nut (53); Screw rod (33) is provided with spring seat (33-1), and described under-voltage spring (48) is flexibly set between hollow stud (54) lower end and this spring seat; Be provided with nut (46) in the above spring seat below of screw rod (33), the external diameter of nut (46) is greater than the internal diameter of described nut external member (47);
The bottom of described screw rod (33) and the spacing control mechanism of connecting shaft are in transmission connection, when moving or moving down on the bottom of screw rod (33), restraining groove (41-1) on the described connecting shaft (42) is broken away from the spacing control mechanism of described connecting shaft, connecting shaft (42) is reach under the effect of cutting off spring (43), cut-out valve pad (39) is finished cut off action.
2. the cut-off valve of a kind of gas pressure regulator, governor according to claim 1, it is characterized in that: the spacing control mechanism of described connecting shaft comprises: the equalizer pulley assembly (30) of being located at screw rod (33) lower end, slide bar (40), front and back are sheathed on the sealing bolt (49) on the connecting shaft (42), spacing briquetting (52) and sliding sleeve (41) successively, elasticity is connected in the extension spring (51) of spacing briquetting (52) rear end, and is located at the steel ball (44) between spacing briquetting (52) and the sealing bolt (49);
Described equalizer pulley assembly (30) comprising: an end is fixed in swing arm (30-3) on lower shell body (32) inwall, be located at the drive wheel (30-2) of swing arm (30-3) central authorities, be located at the positioning wheel (30-1) of swing arm (30-3) the other end and be located at balance spring (38) on housing (32) inwall; Drive wheel (30-2) is located between balance spring (38) top and described screw rod (33) bottom simultaneously;
Described slide bar (40) elasticity is hinged on the housing (32), and the upper end of slide bar (40) has lug boss; Described sliding sleeve (41) is provided with limited ring groove (41-1), and the lower end of slide bar (40) is located on the side of this limited ring groove (41-1), and lug boss on the described slide bar (40) and described positioning wheel (30-1) Elastic Contact.
3. the cut-off valve of a kind of gas pressure regulator, governor according to claim 1 and 2, it is characterized in that: the rearward end of described connecting shaft (42) is extended lower shell body (32), be with the sealing nut (50) that links to each other with lower shell body (32) sealing on the rearward end of connecting shaft (42), connecting shaft (42) flexibly connects with sealing nut (50) sealing.
4. the cut-off valve of a kind of gas pressure regulator, governor according to claim 3, it is characterized in that: the rear end of described connecting shaft (42) is provided with bolt part (42-1), described sealing nut (50) is provided with help pull a cart (45), and the rear end of help pull a cart (45) is provided with the tapped hole (45-1) that matches with the bolt part (42-1) of described connecting shaft (42).
5. the cut-off valve of a kind of gas pressure regulator, governor according to claim 1 and 2, it is characterized in that: the front end of described connecting shaft (42) extends lower shell body (32), cover is useful on the joint (3-1) that links to each other with the valve body (2) of gas pressure regulator, governor (1) on the front end of connecting shaft (42), joint (3-1) links to each other with lower shell body (32) sealing, and joint (3-1) flexibly connects with connecting shaft (42) sealing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200355282U CN201196280Y (en) | 2008-05-07 | 2008-05-07 | Cutting valve of gas pressure regulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200355282U CN201196280Y (en) | 2008-05-07 | 2008-05-07 | Cutting valve of gas pressure regulator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201196280Y true CN201196280Y (en) | 2009-02-18 |
Family
ID=40415917
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200355282U Expired - Fee Related CN201196280Y (en) | 2008-05-07 | 2008-05-07 | Cutting valve of gas pressure regulator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201196280Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102691800A (en) * | 2011-03-24 | 2012-09-26 | 费希尔调压器(上海)有限公司 | Fluid adjustment device with offset control element |
| CN103697218A (en) * | 2014-01-07 | 2014-04-02 | 天津贝特尔流体控制阀门有限公司 | Safety shut-off valve director integrating functions of overpressure, voltage shortage, manual operation and long-range control |
| CN110131477A (en) * | 2019-05-29 | 2019-08-16 | 河南航天液压气动技术有限公司 | A kind of multi-level throttle labyrinth decompression valve |
-
2008
- 2008-05-07 CN CNU2008200355282U patent/CN201196280Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102691800A (en) * | 2011-03-24 | 2012-09-26 | 费希尔调压器(上海)有限公司 | Fluid adjustment device with offset control element |
| CN103697218A (en) * | 2014-01-07 | 2014-04-02 | 天津贝特尔流体控制阀门有限公司 | Safety shut-off valve director integrating functions of overpressure, voltage shortage, manual operation and long-range control |
| CN110131477A (en) * | 2019-05-29 | 2019-08-16 | 河南航天液压气动技术有限公司 | A kind of multi-level throttle labyrinth decompression valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090218 Termination date: 20100507 |