CN111649163A - Tripping mechanism of gas cut-off valve - Google Patents
Tripping mechanism of gas cut-off valve Download PDFInfo
- Publication number
- CN111649163A CN111649163A CN202010547922.XA CN202010547922A CN111649163A CN 111649163 A CN111649163 A CN 111649163A CN 202010547922 A CN202010547922 A CN 202010547922A CN 111649163 A CN111649163 A CN 111649163A
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- connecting rod
- gas
- valve
- pin shaft
- tension spring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
- F16K31/60—Handles
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Safety Valves (AREA)
Abstract
The invention belongs to the technical field of gas conveying equipment, and particularly relates to a tripping mechanism of a gas cut-off valve. Comprises a crank arm, an upper panel, a connecting rod I, a connecting rod II, an inner hexagonal set screw, a pillar, a lower panel, a tension spring and a connecting rod III. And in the access state, the connecting rod III overcomes the acting force of the torsion spring to push the connecting rod I to rotate clockwise by a certain angle, and the tension spring is in a stretching state. When the sensor pushes the pin shaft to move leftwards or rightwards, the pin shaft drives the connecting rod I to rotate clockwise, the tripping hook I is disengaged from the torsion arm, the connecting rod III rotates clockwise under the action of the tension spring, meanwhile, the connecting rod II rotates clockwise synchronously, the concave buckle and the gas cut-off valve part are tripped, the tripping mechanism is in a tripped state, and the gas cut-off valve is automatically cut off. Compared with the prior art, the gas cut-off valve has three functions of overpressure automatic cut-off, underpressure automatic cut-off and manual emergency cut-off, and simultaneously adopts the two-stage lock catch, so that the cut-off precision of the gas cut-off valve is higher, and the safety of the gas cut-off valve is improved.
Description
Technical Field
The invention belongs to the technical field of gas conveying equipment, and particularly relates to a tripping mechanism of a gas cut-off valve.
Background
The gas cut-off valve is used in gas transmission and distribution system to protect against emergency cut-off, and has the function of monitoring overpressure cut-off of gas pressure. The gas cut-off valve can utilize the self pressure of a gas pipe network, and the automatic cut-off of the main valve can be realized without external energy.
The tripping mechanism is a core component of the gas cut-off valve, and the function and the action precision of the tripping mechanism determine the function and the cut-off precision of the gas cut-off valve. The tripping mechanism of the conventional gas cut-off valve only has two functions of overpressure cutting and manual reset at present, and when the pressure is reduced after a rear-end pipeline is aged and leaked, the gas cut-off valve cannot be automatically cut off, so that certain potential safety hazard is caused; meanwhile, the tripping mechanism of the conventional gas cut-off valve is insensitive in locking action, so that the cut-off precision of the gas cut-off valve is low, and the manual reset pressure difference is large. .
Disclosure of Invention
In order to solve the problems, the invention provides the tripping mechanism of the gas cut-off valve, which has three functions of overpressure cutting, underpressure cutting and manual reset, so that the function of the gas cut-off valve is more comprehensive, and meanwhile, the tripping mechanism adopts a two-stage lock catch, so that the mechanism is reliable and stable in action, the cutting precision of the gas cut-off valve is higher, and the safety of the gas cut-off valve is improved.
The technical scheme is as follows: a tripping mechanism of a gas cut-off valve comprises a crank arm, an upper panel, a connecting rod I, a connecting rod II, an inner hexagonal set screw, a supporting column, a lower panel, a tension spring and a connecting rod III. The crank arm is fixedly connected with a pin shaft I, a pin shaft II and a pin shaft III, a boss of the crank arm is provided with a through hole, and the side surface of the boss is provided with a threaded hole; two positioning holes I and three limiting holes I are formed in the upper panel; the connecting rod I consists of a rotating shaft I, a tripping hook I and a torsion spring, the rotating shaft I is fixedly connected with the tripping hook I, and one end of the torsion spring is installed on the tripping hook I; the connecting rod II consists of a rotating shaft II, a tension spring pin shaft I and a tripping hook II, the rotating shaft II is fixedly connected with the tripping hook, the tension spring pin shaft I is fixedly connected with the tripping hook, a groove is formed in the lower end of the tension spring pin shaft, and a concave buckle is arranged on the tripping hook; steps are arranged at two ends of the strut; the lower panel is provided with three bolt holes for fixing, two positioning holes II, a pin shaft hole and three limiting holes II; the connecting rod III is composed of a rotating shaft III, a knurled column, a torque arm and a tension spring pin shaft II, the rotating shaft, the knurled column and the tension spring pin shaft II are fixedly connected with the torque arm, and a groove is formed in the lower end of the tension spring pin shaft II.
Further, the tripping mechanism of the gas cut-off valve is characterized in that a support is arranged in two positioning holes II on the lower panel; a connecting rod III, a connecting rod II and a connecting rod I are arranged in the three limiting holes II, the other end of a torsional spring is arranged on the right side of the pillar, the connecting rod I rotates anticlockwise under the action of the torsional spring, the torsion arm is bent and buckled with the trip hook I, a tension spring pin shaft I on the connecting rod II passes through a pin shaft hole, a groove of the tension spring pin shaft I and a groove of the tension spring pin shaft II are positioned on the same plane, one end of the tension spring is arranged in the groove of the tension spring pin shaft II, the other end of the tension spring is arranged in the groove of the tension spring pin shaft I, an upper panel is arranged on, the upper end of connecting rod III, the pillar is installed and is linked firmly with the top panel in locating hole I, but connecting rod I, connecting rod II, connecting rod III install respectively in spacing hole I free rotation, and the through-hole that sets up on the bent arm passes through the boss is installed in pivot I's step department, makes the right flank of bent arm parallel with the left surface above, makes the bent arm link firmly with pivot I through hexagonal holding screw.
Further, in the tripping mechanism of the gas cut-off valve, the connecting rod III enables the tension spring pin shaft II to be positioned on the right side of the lower panel under the action of the tension spring in a tripping state, the left side surface of the connecting rod II is contacted with the support, and the connecting rod I is contacted with the right side surface of the connecting rod II under the action of the torsion spring; when the certain angle of elasticity anticlockwise rotation that drives connecting rod III through the knurling post and overcomes the extension spring, the epaxial extension spring round pin axle I of connecting rod II is anticlockwise rotated in the round pin axle hole within range of panel down, and after connecting rod III overcome torsional spring effort and promote connecting rod I clockwise rotation certain angle, the extension spring is in tensile state, and connecting rod III is in the pretension state, has clockwise rotation's trend, breaks off hook I and torque arm lock, and concave knot is in the lock state with gas trip valve part, makes a tripping device of gas trip valve is in the hasp state.
Further, a tripping device of gas trip valve, when the sensor of gas trip valve promoted round pin axle I to move left because the pressure is too high, round pin axle I drove connecting rod I clockwise rotation, made trip hook and torque arm throw off, connecting rod III clockwise rotated under the extension spring effort, and connecting rod II clockwise synchronization rotates simultaneously, made concave knot and gas trip valve part dropout, made a tripping device of gas trip valve is in the dropout state, and gas trip valve superpressure automatic cutout.
Further, a tripping device of gas trip valve, when the sensor of gas trip valve moved right owing to pressure crosses low pulling round pin axle II, round pin axle II drove connecting rod I clockwise rotation, made tripping hook I and torque arm throw off, and connecting rod III rotates clockwise under the extension spring effort, and connecting rod II rotates clockwise in step simultaneously, makes concave knot and gas trip valve part dropout, makes a tripping device of gas trip valve is in the dropout state, the undervoltage automatic cutout of gas trip valve.
Further, when the gas trip valve needs manual emergency cut-off, press the manual cut-off button and make round pin axle III remove right when the trip, round pin axle III drives connecting rod I clockwise rotation, makes trip hook and torque arm throw off, and connecting rod III clockwise rotates under the extension spring effort, and connecting rod II clockwise synchronization rotates simultaneously, makes concave knot and the dropout of gas trip valve part, makes the tripping device of a gas trip valve is in the dropout state, the manual emergency cut-off of gas trip valve.
The invention has the beneficial effects that:
1. the tripping mechanism can enable the gas cut-off valve to have three functions of overpressure automatic cut-off, underpressure automatic cut-off and manual emergency cut-off, so that the function of the gas cut-off valve is more comprehensive;
2. the tripping mechanism adopts a secondary lock catch, so that the cutting precision of the gas cut-off valve is higher;
3. the tripping mechanism is reliable and stable in action, and the safety of the gas cut-off valve is improved.
Drawings
Fig. 1 is a schematic structural view of a tripping mechanism of a gas cut-off valve according to the invention.
Fig. 2 is an assembly view (in a trip state) of a trip mechanism of the gas shut-off valve according to the present invention.
Fig. 3 is an assembly view (locked state) of a tripping mechanism of the gas shut-off valve according to the present invention.
Fig. 4 is a partial assembly view of a tripping mechanism of the gas shut-off valve.
Fig. 5 is a partial assembly view of the connecting rod I.
Fig. 6 is a partial assembly view of the connecting rod II.
Fig. 7 is a partial assembly view of the connecting rod III.
The reference signs are:
1 crank arm, 2 upper panel, 3 connecting rod I, 4 connecting rod II, 5 inner hexagonal set screws, 6 support, 7 lower panel, 8 extension springs, 9 connecting rod III, 101 pin shaft I, 102 through hole, 103 pin shaft II, 104 pin shaft III, 201 positioning hole I, 202 spacing hole I, 301 rotating shaft I, 302 tripping hook I, 303 torsion spring, 401 rotating shaft II, 402 extension spring pin shaft I, 403 tripping hook II, 404 concave buckle, 701 positioning hole II, 702 pin shaft hole, 703 bolt hole, 704 spacing hole II, 901 rotating shaft III, 902 knurling column, 903 torsion arm, 904 extension spring pin shaft II.
Detailed Description
The invention will be further described with reference to the accompanying figures 1 to 7:
a tripping mechanism of a gas cut-off valve comprises a crank arm 1, an upper panel 2, a connecting rod 3, a connecting rod 4, a connecting rod II, a hexagon socket set screw 5, a supporting column 6, a lower panel 7, a tension spring 8 and a connecting rod 9. The 1 crank arm is fixedly connected with a pin shaft I101, a pin shaft II 103 and a pin shaft III 104, a boss of the 1 crank arm is provided with a through hole 102, and the side surface of the boss is provided with a threaded hole; two 201 positioning holes I and three 202 limiting holes I are formed in the upper panel 2; the 3 connecting rod I consists of a 301 rotating shaft I, a 302 disengaging hook I and a 303 torsion spring, the 301 rotating shaft I is fixedly connected with the 302 disengaging hook I, and one end of the 303 torsion spring is installed on the 302 disengaging hook I; the 4-link II consists of a 401 rotating shaft II, a 402 tension spring pin shaft I and a 403 release hook II, the 401 rotating shaft II is fixedly connected with the 403 release hook, the 402 tension spring pin shaft I is fixedly connected with the 403 release hook, the lower end of the 402 tension spring pin shaft is provided with a groove, and the 403 release hook is provided with a 404 concave buckle; steps are arranged at two ends of the 6-column; three 703 bolt holes for fixing are arranged on the lower panel 7, two 701 positioning holes II, one 702 pin shaft hole and three 704 limiting holes II are arranged on the lower panel; the 9 connecting rod III is composed of a 901 rotating shaft III, a 902 knurling column, a 903 torque arm and a 904 tension spring pin shaft II, the 901 rotating shaft, the 902 knurling column and the 904 tension spring pin shaft II are fixedly connected with the 903 torque arm, and a groove is formed in the lower end of the 904 tension spring pin shaft II.
Further, the tripping mechanism of the gas cut-off valve is characterized in that 6 support columns are installed in two 701 positioning holes II on a 7 lower panel; 9 connecting rods III, 4 connecting rods II and 3 connecting rods I are arranged in three 704 limiting holes II, the other end of a 303 torsion spring is arranged on the right side of a 6 support column, so that the 3 connecting rod I rotates anticlockwise under the action of the 303 torsion spring, the bending of a 903 torsion arm is buckled with the 302 tripping hook I, a 402 tension spring pin shaft I on the 4 connecting rod II passes through a 702 pin shaft hole, a groove of the 402 tension spring pin shaft I and a groove of a 904 tension spring pin shaft II are positioned on the same plane, one end of an 8 tension spring is arranged in the groove of the 904 tension spring pin shaft II, the other end of the 8 tension spring is arranged in the groove of the 402 tension spring pin shaft I, a 2 upper panel is arranged at the upper ends of the 6 support column, the 3 connecting rods I, 4 connecting rods II and 9 connecting rod III, the 6 support column is arranged in a 201 positioning hole I and fixedly connected with the 2 upper panel, the 3 connecting rods I, 4 connecting rods II and 9 connecting rods III are, the right side surface of the crank arm 1 is parallel to the left side surface of the upper panel 2, and the crank arm 1 is fixedly connected with the rotating shaft I301 through a hexagon socket head cap screw 5.
Further, in the tripping mechanism of the gas cut-off valve, when in a tripping state, the 9 connecting rod III enables the 904 tension spring pin shaft II to be positioned on the right side of the 7 lower panel under the action of the 8 tension spring, the left side surface of the 4 connecting rod II is contacted with the 6 support, and the 3 connecting rod I is contacted with the right side surface of the 4 connecting rod II under the action of the 303 torsion spring; when driving 9 connecting rod III and overcoming the elasticity anticlockwise rotation certain angle of 8 extension springs through 902 annular knurl post, 402 extension spring round pin axle I on 4 connecting rod II is anticlockwise rotation in the 702 round pin axle hole within range of panel under 7, 9 connecting rod III overcomes 303 torsional spring effort and promotes 3 connecting rod I after clockwise rotation certain angle, 8 extension springs are in tensile state, 9 connecting rod III is in pretension state, has clockwise rotation's trend, 301 trip hook I and 903 torque arm lock, 404 concave knot is in the lock state with gas trip valve part, makes a tripping device of gas trip valve is in the hasp state, gas trip valve keeps the route.
Further, a tripping device of gas trip valve, when the sensor of gas trip valve promoted 101 round pin axle I when moving left because the pressure is too high, 101 round pin axle I drove 3 connecting rod I clockwise rotations, made 301 trip hook I and 903 torque arm throw off, 9 connecting rod III clockwise rotations under 8 extension spring efforts, and 4 connecting rod II clockwise synchronization rotate simultaneously, make 404 concave knot and the tripping of gas trip valve part, make a tripping device of gas trip valve is in the dropout state, gas trip valve superpressure automatic cutout.
Further, a tripping device of gas trip valve, when the sensor of gas trip valve moved right owing to pressure crosses low pulling 103 round pin axle II, 103 round pin axle II drove 3 connecting rod I clockwise rotations, made 301 trip hook and 903 torque arm throw off, 9 connecting rod III clockwise rotations under 8 extension spring efforts, and 4 connecting rod II clockwise synchronization rotate simultaneously, made 404 concave knot and gas trip valve part dropout, made a tripping device of gas trip valve is in the dropout state, the undervoltage automatic cutout of gas trip valve.
Further, a tripping device of gas trip valve, when the gas trip valve need manual emergency cut-off, press manual cut-off button and make 104 round pin axle III remove right the time, 103 round pin axle III drives 3 connecting rod I clockwise rotations, makes 301 trip hook and 903 torque arm throw off, and 9 connecting rod III clockwise rotation under 8 extension spring efforts, and 4 connecting rod II clockwise synchronization rotate simultaneously, make 404 concave knot and the tripping of gas trip valve part, make a tripping device of gas trip valve is in the dropout state, the manual emergency cut-off of gas trip valve.
Claims (10)
1. The utility model provides a tripping device of gas trip valve which characterized in that: comprises a crank arm 1, an upper panel 2, a connecting rod I3, a connecting rod II 4, a hexagon socket set screw 5, a pillar 6, a lower panel 7, a tension spring 8 and a connecting rod III 9.
2. The 1-crank arm according to claim 1, wherein: the 1 crank arm is fixedly connected with a 101 pin shaft I, a 103 pin shaft II and a 104 pin shaft III, a boss of the 1 crank arm is provided with a 102 through hole, and the side surface of the boss is provided with a threaded hole.
3. The 3-link I of claim 1, wherein: the novel multifunctional electric wrench consists of a 301 rotating shaft I, a 302 tripping hook I and a 303 torsion spring, wherein the 301 rotating shaft I is fixedly connected with the 302 tripping hook I, and one end of the 303 torsion spring is installed on the 302 tripping hook I.
4. The 4-link II according to claim 1, wherein: the rotating shaft II of 401 is fixedly connected with the tripping hook of 403, the tension spring pin shaft I of 402 is fixedly connected with the tripping hook of 403, the lower end of the tension spring pin shaft I of 402 is provided with a groove, and the tripping hook of 403 is provided with a concave buckle 404.
5. The 9-link III of claim 1, wherein: the special fixture is composed of a 901 rotating shaft III, a 902 knurling column, a 903 torque arm and a 904 tension spring pin shaft II, wherein the 901 rotating shaft, the 902 knurling column and the 904 tension spring pin shaft II are fixedly connected with the 903 torque arm, and the lower end of the 904 tension spring pin shaft II is provided with a groove.
6. The trip mechanism of a gas shut-off valve according to claim 1, characterized in that: 6 pillars are arranged in two 701 positioning holes II on the 7 lower panels; 9 connecting rods III, 4 connecting rods II and 3 connecting rods I are arranged in three 704 limiting holes II, the other end of a 303 torsion spring is arranged on the right side of a 6 support column, so that the 3 connecting rod I rotates anticlockwise under the action of the 303 torsion spring, the bending of a 903 torsion arm is buckled with the 302 release clasp I, a 402 tension spring pin shaft I on the 4 connecting rod II passes through a 702 pin shaft hole, a groove of the 402 tension spring pin shaft I and a groove of a 904 tension spring pin shaft II are positioned on the same plane, one end of an 8 tension spring is arranged in the groove of the 904 tension spring pin shaft II, the other end of the 8 tension spring is arranged in the groove of the 402 tension spring pin shaft I, a 2 upper panel is arranged at the upper ends of the 6 support column, the 3 connecting rods I, the 4 connecting rods II and the 9 connecting rod III, the 6 support column is arranged in a 201 positioning hole I and fixedly connected with the 2 upper panel, the 3 connecting rods I, the 4 connecting rods II and the, the right side surface of the crank arm 1 is parallel to the left side surface of the upper panel 2, and the crank arm 1 is fixedly connected with the rotating shaft I301 through a hexagon socket head cap screw 5.
7. The trip mechanism of a gas shut-off valve according to claim 6, characterized in that: when the device is in a tripping state, the 9 connecting rod III enables the 904 tension spring pin shaft II to be positioned on the right side of the 7 lower panel under the action of the 8 tension spring, the left side surface of the 4 connecting rod II is contacted with the 6 support, and the 3 connecting rod I is contacted with the right side surface of the 4 connecting rod II under the action of the 303 torsion spring; when driving 9 connecting rod III and overcoming the elasticity anticlockwise rotation certain angle of 8 extension springs through 902 annular knurl post, 402 extension spring round pin axle I on 4 connecting rod II is anticlockwise rotation in the 702 round pin axle hole within range of panel under 7, 9 connecting rod III overcomes 303 torsional spring effort and promotes 3 connecting rod I after clockwise rotation certain angle, 8 extension springs are in tensile state, 9 connecting rod III is in pretension state, has clockwise rotation's trend, 301 trip hook I and 903 torque arm lock, 404 concave knot is in the lock state with gas trip valve part, makes a tripping device of gas trip valve is in the hasp state, gas trip valve keeps the route.
8. The trip mechanism of a gas shut-off valve according to claim 6, characterized in that: when a sensor of the gas cut-off valve pushes a 101 pin shaft I to move leftwards due to overhigh pressure, the 101 pin shaft I drives a 3 connecting rod I to rotate clockwise, a 301 tripping hook I is disengaged from a 903 torque arm, a 9 connecting rod III rotates clockwise under the action of 8 tension springs, and meanwhile, a 4 connecting rod II rotates clockwise synchronously, so that a 404 concave buckle is tripped with a part of the gas cut-off valve, the tripping mechanism of the gas cut-off valve is in a tripping state, and the gas cut-off valve is automatically cut off under overpressure.
9. The trip mechanism of a gas shut-off valve according to claim 6, characterized in that: when the sensor of gas trip valve moved right owing to pressure low pulling 103 round pin axle II excessively, 103 round pin axle II drove 3 connecting rod I clockwise rotation, made 301 trip hook and 903 torque arm throw off, and 9 connecting rod III clockwise rotation under 8 extension spring efforts, 4 connecting rod II clockwise synchronization rotated simultaneously, made 404 concave knot and the dropout of gas trip valve part, made a tripping device of gas trip valve is in the dropout state, and the undervoltage automatic cutout of gas trip valve.
10. The trip mechanism of a gas shut-off valve according to claim 6, characterized in that: when the gas trip valve needs manual emergency cut-off, press manual cut-off button and make 104 round pin axle III remove right, 103 round pin axle III drives 3 connecting rod I clockwise rotation, makes 301 trip hook and 903 torque throw off, and 9 connecting rod III clockwise rotation under 8 extension spring efforts, and 4 connecting rod II clockwise synchronization rotate simultaneously, make 404 concave knot and gas trip valve part dropout, make a tripping device of gas trip valve is in the dropout state, and the manual emergency cut-off of gas trip valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010547922.XA CN111649163A (en) | 2020-06-16 | 2020-06-16 | Tripping mechanism of gas cut-off valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010547922.XA CN111649163A (en) | 2020-06-16 | 2020-06-16 | Tripping mechanism of gas cut-off valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111649163A true CN111649163A (en) | 2020-09-11 |
Family
ID=72347461
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010547922.XA Pending CN111649163A (en) | 2020-06-16 | 2020-06-16 | Tripping mechanism of gas cut-off valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111649163A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3791396A (en) * | 1972-09-15 | 1974-02-12 | W Nelson | Valve shutoff device |
| GB1466247A (en) * | 1974-07-31 | 1977-03-02 | Ti Domestic Appliances Ltd | Gas heater |
| CN2035440U (en) * | 1988-08-16 | 1989-04-05 | 刘华 | Gas burning timing controller |
| CN2295088Y (en) * | 1997-04-03 | 1998-10-21 | 马晓明 | Safety fully-automatic cock valve |
| CN201461977U (en) * | 2009-07-03 | 2010-05-12 | 邵柯璇 | Gas meter electronic internal valve |
| CN103711956A (en) * | 2013-12-30 | 2014-04-09 | 乐山市山鹰模具有限责任公司 | Automatic emergency shut-off valve |
| CN210687148U (en) * | 2019-08-27 | 2020-06-05 | 瑞星久宇燃气设备（成都）有限公司 | Town gas cut-off valve |
-
2020
- 2020-06-16 CN CN202010547922.XA patent/CN111649163A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3791396A (en) * | 1972-09-15 | 1974-02-12 | W Nelson | Valve shutoff device |
| GB1466247A (en) * | 1974-07-31 | 1977-03-02 | Ti Domestic Appliances Ltd | Gas heater |
| CN2035440U (en) * | 1988-08-16 | 1989-04-05 | 刘华 | Gas burning timing controller |
| CN2295088Y (en) * | 1997-04-03 | 1998-10-21 | 马晓明 | Safety fully-automatic cock valve |
| CN201461977U (en) * | 2009-07-03 | 2010-05-12 | 邵柯璇 | Gas meter electronic internal valve |
| CN103711956A (en) * | 2013-12-30 | 2014-04-09 | 乐山市山鹰模具有限责任公司 | Automatic emergency shut-off valve |
| CN210687148U (en) * | 2019-08-27 | 2020-06-05 | 瑞星久宇燃气设备（成都）有限公司 | Town gas cut-off valve |
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Application publication date: 20200911 |