CN111649163A - A tripping mechanism for a gas shut-off valve - Google Patents

Abstract

The invention belongs to the technical field of gas conveying equipment, in particular to a tripping mechanism of a gas shut-off valve. Including crank arm, upper panel, connecting rod I, connecting rod II, hexagon socket set screw, strut, lower panel, tension spring, connecting rod III. In the passage state, the connecting rod III overcomes the force of the torsion spring and pushes the connecting rod I to rotate clockwise by a certain angle, and the tension spring is in a stretched state. When the sensor pushes the pin shaft to move left or right, the pin shaft drives the connecting rod I to rotate clockwise, so that the release hook I is disengaged from the torsion arm, and the connecting rod III rotates clockwise under the force of the tension spring. II rotates synchronously clockwise to trip the recessed buckle and the gas shut-off valve parts, the tripping mechanism is in a tripping state, and the gas shut-off valve is automatically cut off. Compared with the prior art, the present invention enables the gas cut-off valve to have three functions of automatic cut-off of overpressure, automatic cut-off of under-pressure and manual emergency cut-off, and at the same time, a secondary lock is adopted, so that the cut-off precision of the gas cut-off valve is higher and improved. Safety of gas shut-off valves.

Description

A tripping mechanism for a gas shut-off valve

technical field

The invention belongs to the technical field of gas conveying equipment, in particular to a tripping mechanism of a gas cut-off valve.

Background technique

The gas cut-off valve is used in the gas transmission and distribution system to play an emergency cut-off protection function. It has the function of monitoring the gas pressure overpressure cut-off. When the system pressure is higher than a certain pressure value, the cut-off valve can be quickly cut off in an emergency to achieve the purpose of safe gas use. , consists of main valve, tripping mechanism and sensor. The gas shut-off valve can use the pressure of the gas pipe network itself to realize the automatic shut-off of the main valve without external energy.

The tripping mechanism is the core component of the gas shut-off valve, and its function and action accuracy determine the function and cutting accuracy of the gas shut-off valve. At present, the tripping mechanism of the conventional gas shut-off valve only has two functions: overpressure shut-off and manual reset. When the pressure of the back-end pipeline is reduced due to aging and leakage, the gas shut-off valve cannot be automatically shut off, which has a certain safety hazard. At the same time, the conventional gas shut-off valve The locking action of the tripping mechanism is not sensitive, resulting in a low cutting accuracy of the gas shut-off valve and a large manual reset pressure difference. .

SUMMARY OF THE INVENTION

In view of the above problems, the present invention provides a tripping mechanism for a gas shut-off valve. The tripping mechanism has three functions of overpressure shut-off, under-pressure shut-off and manual reset, so that the functions of the gas shut-off valve are more comprehensive. The buckle mechanism adopts a secondary lock, and the mechanism action is reliable and stable, which makes the cutting accuracy of the gas shut-off valve higher and improves the safety of the gas shut-off valve.

The technical scheme is as follows: the tripping mechanism of the gas shut-off valve includes a crank arm, an upper panel, a connecting rod I, a connecting rod II, a hexagon socket set screw, a strut, a lower panel, a tension spring, and a connecting rod III. The crank arm is fixedly connected with pin shaft I, pin shaft II and pin shaft III, the boss of the crank arm is provided with a through hole, and the side of the boss is provided with a threaded hole; the upper plate is provided with two positioning holes I and three limit holes I; the connecting rod I is made up 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; Rod II is composed of rotating shaft II, tension spring pin shaft I and trip hook II. The rotating shaft II is fixedly connected with the tripping hook, and the tension spring pin shaft I is fixedly connected with the tripping hook. The hook is provided with a concave buckle; the two ends of the pillar are provided with steps; the lower panel is provided with three bolt holes for fixing, two positioning holes II, one pin shaft hole and three limit holes II; The connecting rod III is composed of a rotating shaft III, a knurled column, a torsion 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 torsion arm, and the lower end of the tension spring pin shaft II is provided with a groove.

Further, the tripping mechanism of the gas shut-off valve specifically includes installing struts in two positioning holes II on the lower panel; installing connecting rod III, connecting rod II and connecting rod I in the three limiting holes II, The other end of the torsion spring is installed on the right side of the strut, so that the connecting rod I rotates counterclockwise under the action of the torsion spring, the bending of the torsion arm is engaged with the trip hook I, and the tension spring pin I on the connecting rod II passes through. Through the pin shaft hole, the groove of the tension spring pin I and the groove of the tension spring pin II are on the same plane, one end of the tension spring is installed in the groove of the tension spring pin II, and the other end of the tension spring is installed in the tension spring. In the groove of the spring pin shaft I, the upper panel is installed on the upper ends of the strut, connecting rod I, connecting rod II, and connecting rod III, and the strut is installed in the positioning hole I to be fixedly connected with the upper panel, and connecting rod I, connecting rod II, The connecting rods III are respectively installed in the limit holes I and can rotate freely. The crank arm is installed at the step of the rotating shaft I through the through hole provided on the boss, so that the right side of the crank arm is parallel to the left side of the upper side. The hexagonal set screws fix the crank arm to the shaft I.

Further, in the tripping mechanism of the gas shut-off valve, when the connecting rod III is in the tripping state, under the action of the tension spring, the pin shaft II of the tension spring is located on the right side of the lower panel, and the left side of the connecting rod II is connected to the strut. Contact, connecting rod I is in contact with the right side of connecting rod II under the action of the torsion spring; when connecting rod III is driven by the knurled column to overcome the elastic force of the tension spring to rotate counterclockwise by a certain angle, the tension spring pin on the connecting rod II I rotates counterclockwise within the range of the pin shaft hole on the lower panel. After connecting rod III overcomes the force of the torsion spring and pushes connecting rod I to rotate clockwise for a certain angle, the tension spring is in a stretched state, and the connecting rod III is in a preloaded state, with a clockwise The trend of rotation, the trip hook I is engaged with the torsion arm, and the concave buckle is in a engaged state with the gas shut-off valve parts, so that the trip mechanism of the gas shut-off valve is in a locked state.

Further, in the tripping mechanism of the gas shut-off valve, when the sensor of the gas shut-off valve pushes the pin shaft I to the left due to excessive pressure, the pin shaft I drives the connecting rod I to rotate clockwise, so that the tripping hook and the The torsion arm is disengaged, the connecting rod III rotates clockwise under the force of the tension spring, and at the same time the connecting rod II rotates synchronously clockwise, so that the concave buckle and the gas shut-off valve parts are released, and the tripping mechanism of the gas shut-off valve is In the tripping state, the gas cut-off valve is automatically cut off due to overpressure.

Further, in the tripping mechanism of the gas shut-off valve, when the sensor of the gas shut-off valve pulls the pin shaft II to move to the right due to the low pressure, the pin shaft II drives the connecting rod I to rotate clockwise to make the trip hook I Disengaged from the torsion arm, the connecting rod III rotates clockwise under the force of the tension spring, and at the same time the connecting rod II rotates synchronously clockwise, so that the concave buckle and the gas shut-off valve parts are tripped, and the gas shut-off valve is tripped The mechanism is in a tripping state, and the gas cut-off valve is automatically cut off under pressure.

Further, the tripping mechanism of the gas shut-off valve, when the gas shut-off valve needs to be cut off manually, when the manual shut-off button is pressed to move the pin III to the right, the pin III drives the connecting rod I to rotate clockwise, so that the The tripping hook is disengaged from the torsion arm, the connecting rod III rotates clockwise under the force of the tension spring, and at the same time the connecting rod II rotates synchronously clockwise, so that the concave buckle and the gas cut-off valve parts are tripped, so that the gas cut-off valve described The tripping mechanism is in a tripping state, and the gas shut-off valve is manually emergency cut off.

The beneficial effects of the present invention are:

1. The tripping mechanism enables the gas shut-off valve to have three functions: automatic cut-off of overpressure, automatic cut-off of under-pressure and manual emergency cut-off, making the function of the gas shut-off valve more comprehensive;

2. The tripping mechanism adopts a secondary lock, which makes the cutting accuracy of the gas shut-off valve higher;

3. The action of the tripping mechanism is reliable and stable, which improves the safety of the gas shut-off valve.

Description of drawings

FIG. 1 is a schematic structural diagram of a tripping mechanism of a gas shut-off valve according to the present invention.

FIG. 2 is an assembly diagram of a tripping mechanism of a gas shut-off valve according to the present invention (tripping state).

FIG. 3 is an assembly diagram (locked state) of the tripping mechanism of a gas shut-off valve according to the present invention.

FIG. 4 is a partial assembly view of a tripping mechanism of a gas shut-off valve according to the present invention.

Figure 5 is a partial assembly view of the connecting rod I.

Figure 6 is a partial assembly view of connecting rod II.

FIG. 7 is a partial assembly view of connecting rod III.

The reference numbers are:

1 crank arm, 2 upper panel, 3 connecting rod I, 4 connecting rod II, 5 hexagon socket head cap screws, 6 pillars, 7 lower panel, 8 tension springs, 9 connecting rod III, 101 pin shaft I, 102 through holes, 103, pin shaft II, 104 pin shaft III, 201 positioning hole I, 202 limit hole I, 301 shaft I, 302 trip hook I, 303 torsion spring, 401 shaft II, 402 tension spring pin shaft I, 403 tripping Hook II, 404 concave buckle, 701 positioning hole II, 702 pin hole, 703 bolt hole, 704 limit hole II, 901 shaft III, 902 knurled column, 903 torsion arm, 904 tension spring pin shaft II,.

Detailed ways

In conjunction with accompanying drawing 1-7, the present invention is further described:

The tripping mechanism of the gas shut-off valve includes 1 crank arm, 2 upper panel, 3 connecting rod I, 4 connecting rod II, 5 hexagon socket set screws, 6 pillars, 7 lower panels, 8 tension springs, 9 connecting rods. Rod III. 101 pin shaft I, 103 pin shaft II and 104 pin shaft III are fixedly connected to the 1 crank arm, the boss of the 1 crank arm is provided with a 102 through hole, and the side of the boss is provided with a threaded hole; There are two 201 positioning holes I and three 202 limit holes I; the 3 connecting rod I is composed of 301 rotating shaft I, 302 tripping hook I and 303 torsion spring, 301 rotating shaft I and 302 tripping hook I are fixedly connected , one end of the 303 torsion spring is installed on the 302 release hook I; the 4-link II is composed of the 401 shaft II, the 402 tension spring pin shaft I and the 403 release hook II, and the 401 shaft II is fixedly connected with the 403 release hook, 402 tension spring pin I and 403 release hook are fixedly connected, the lower end of 402 tension spring pin is provided with a groove, and 403 release hook is provided with 404 concave buckle; the two ends of the 6 pillars are provided with steps; the 7 lower There are three 703 bolt holes on the panel for fixing, two 701 positioning holes II, one 702 pin hole and three 704 limit holes II; The arm is composed of 904 tension spring pin shaft II, 901 rotating shaft, 902 knurled column and 904 tension spring pin shaft II are fixedly connected with 903 torsion arm, and the lower end of 904 tension spring pin shaft II is provided with a groove.

Further, the tripping mechanism of the gas shut-off valve specifically includes installing 6 pillars in two 701 positioning holes II on the 7 lower panel; installing 9 connecting rods III and 4 connecting rods in three 704 limit holes II. Rod II and 3-link I, the other end of the 303 torsion spring is installed on the right side of the 6-pillar, so that the 3-link rotates counterclockwise under the action of the 303 torsion spring, and the bending of the 903 torsion arm and the 302 release hook I Buckle, the 402 tension spring pin I on the 4-link II passes through the 702 pin hole, the groove of the 402 tension spring pin I and the groove of the 904 tension spring pin II are on the same plane, and one end of the 8 tension spring Installed in the groove of the 904 tension spring pin II, the other end of the 8 tension spring is installed in the groove of the 402 tension spring pin I, and the 2 upper panel is installed in the 6 pillar, 3 connecting rod I, 4 connecting rod II, The upper end of the 9-link III, the 6-pillar is installed in the 201 positioning hole I and is fixedly connected to the 2 upper panel, and the 3-link I, 4-link II, and 9-link III are respectively installed in the three 202 limit holes I and can be freely Rotate, 1 crank arm is installed at the step of 301 shaft I through the 102 through hole set on the boss, so that the right side of the 1 crank arm is parallel to the left side of the upper panel of 2, and the 1 The crank arm is fixedly connected with the 301 rotating shaft I.

Further, in the tripping mechanism of the gas shut-off valve, in the tripping state, the 904 tension spring pin II is located on the right side of the 7 lower panel under the action of the 8 tension spring by the 9 connecting rod III, and the 4 connecting rod II is on the right side of the lower panel. The left side is in contact with the 6 pillars, and the 3 link I is in contact with the right side of the 4 link II under the action of the 303 torsion spring; when the 902 knurled column drives the 9 link III to overcome the elastic force of the 8 tension spring and rotate counterclockwise for a certain amount At the angle, the 402 tension spring pin I on the 4-link II rotates counterclockwise within the range of the 702 pin hole on the lower panel of 7, and the 9-link III overcomes the force of the 303 torsion spring to push the 3-link I clockwise to rotate a certain angle After that, the 8 tension spring is in the tension state, the 9 connecting rod III is in the preload state, and has a clockwise rotation trend, the 301 release hook I is engaged with the 903 torsion arm, and the 404 concave buckle is in the engaged state with the gas shut-off valve parts. , so that the tripping mechanism of the gas shut-off valve is in a locked state, and the gas shut-off valve maintains the passage.

Further, in the tripping mechanism of the gas shut-off valve, when the sensor of the gas shut-off valve pushes the 101 pin shaft I to move leftward due to excessive pressure, the 101 pin shaft I drives the 3 connecting rod I to rotate clockwise, so that the 301 pin shaft I rotates clockwise. The trip hook I is disengaged from the torsion arm of 903, the 9 link III rotates clockwise under the force of the 8 tension spring, and the 4 link II rotates synchronously clockwise, so that the 404 concave buckle and the gas shut-off valve parts are released, so that all the The tripping mechanism of the gas shut-off valve is in a tripping state, and the gas shut-off valve is automatically cut off due to overpressure.

Further, in the tripping mechanism of the gas shut-off valve, when the sensor of the gas shut-off valve pulls the 103 pin II to move to the right due to the low pressure, the 103 pin II drives the 3 connecting rod I to rotate clockwise, so that the 301 The release hook is disengaged from the 903 torsion arm, the 9-link III rotates clockwise under the force of the 8-tension spring, and the 4-link II rotates synchronously clockwise, so that the 404 concave buckle and the gas shut-off valve parts are released, so that the A tripping mechanism of a gas shut-off valve is in a tripping state, and the gas shut-off valve is automatically cut off under pressure.

Further, the tripping mechanism of the gas shut-off valve, when the gas shut-off valve needs to be manually cut off urgently, when the manual shut-off button is pressed to make the 104 pin shaft III move to the right, the 103 pin shaft III drives the 3 connecting rod I clockwise. Rotate to disengage the 301 release hook from the 903 torsion arm, the 9-link III rotates clockwise under the force of the 8-tension spring, and the 4-link II rotates synchronously clockwise to make the 404 concave buckle and the gas shut-off valve part release , so that the tripping mechanism of the gas shut-off valve is in a tripping state, and the gas shut-off valve is manually emergency cut off.

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.

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