Gas self-closing valve cut-off drive mechanism

Abstract

The application relates to a gas self-closing valve cut-off driving mechanism, wherein a slot is arranged on a vertical guide rod, a limiting block is arranged in the slot, a vertical guide rod locking block is driven to move through a locking block driving element, an intermediate block is arranged on the vertical guide rod locking block, a reset insertion slot is arranged on the intermediate block, cam driving clamping slots are arranged on the two sides of the intermediate block, the intermediate block is inserted into the slot on the vertical guide rod, a cam is arranged on the lower side of the vertical guide rod locking block and is hinged to a cam hinge shaft, a cam protruding part is arranged on the upper side of the cam, a cam reset torsional spring is arranged on the cam hinge shaft, a top rod is abutted against the cam after penetrating through the slot, a reset driving assembly lower side is provided with a reset insertion pin matched with the reset insertion slot, and the upper end of the vertical guide rod is inserted into the reset driving assembly and the lower end is abutted against the pressure diaphragm. The application is more sensitive in response, the locking after cut-off is more reliable, and the operation is simple and convenient.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of gas safety technology, in particular to a gas self-closing valve cut-off driving mechanism. BACKGROUND

[0002] In the field of city gas, due to the characteristics of gas leakage and explosion, improper use of gas during use can easily cause gas accidents. In order to reduce the occurrence of gas accidents, gas companies and gas equipment suppliers have developed various gas safety equipment, and the gas self-closing valve is one of them. The product can automatically cut off the gas when the gas pipeline has high pressure, under pressure and other conditions, so it is widely used in gas engineering. For example, a kind of gas self-closing valve is disclosed in Chinese patent CN218267442U, which includes an induction valve body, a mounting seat body, a metal pressure spring, an induction shaft rod and other structures. The induction shaft rod is arranged in the mounting seat body and the lower end is in contact with the metal pressure spring. The induction shaft rod is provided with a shaft rod protrusion. The induction valve body is provided with a horizontal knob shaft. One end of the knob shaft is in contact with the induction shaft rod, and the other end is in contact with the ball valve knob. The device uses the metal pressure spring to sense the change of gas pressure, and uses the lifting action of the induction shaft rod to drive the knob shaft to move, thereby realizing the opening and closing of the ball valve assembly. However, the device uses the shaft rod protrusion on the induction shaft rod to drive the knob shaft to move, and the reaction sensitivity needs to be further improved. For example, if the machining precision of the shaft rod protrusion has an error, it will affect the reaction sensitivity of the device. SUMMARY

[0003] The purpose of the present application is to provide a gas self-closing valve cut-off driving mechanism, which is more sensitive in reaction, more reliable in locking after cutting off, and simple and convenient to operate.

[0004] The purpose of the present application is achieved by the following technical scheme:

[0005] A gas self-closing valve cut-off driving mechanism, comprising a vertical guide rod, a vertical guide rod lock block, a cam, a lock block driving element, a pressure diaphragm, a jack, a reset pin and a reset driving assembly, wherein the vertical guide rod is provided with a slot, and a limiting block is arranged in the slot. The vertical guide rod lock block is driven to move by the lock block driving element, and the vertical guide rod lock block is provided with an intermediate block. The intermediate block is provided with a reset slot, and the two sides of the intermediate block are provided with cam driving clamping grooves. The intermediate block is inserted into the slot on the vertical guide rod. The cam is arranged on the lower side of the vertical guide rod lock block and is hinged to a cam hinge shaft. The upper side of the cam is provided with a cam protrusion. The cam hinge shaft is provided with a cam reset torsional spring. The jack passes through the slot and is in contact with the cam. The lower side of the reset driving assembly is provided with a reset pin matched with the reset slot. The upper end of the vertical guide rod is inserted into the reset driving assembly, and the lower end is in contact with the pressure diaphragm.

[0006] The vertical guide rod, the vertical guide rod lock block, the cam, the lock block driving element, the reset pin and the reset driving assembly are arranged in a mounting seat body, the reset driving assembly comprises a reset button, a first limiting spring and a limiting gland are arranged inside the reset button, a first end plate is arranged at the upper end of the vertical guide rod, a guide rod is arranged on the first end plate, the limiting gland abuts against the first end plate, the first limiting spring is sleeved on the guide rod and arranged between the top plate of the reset button and the limiting gland, a second limiting spring is sleeved at the lower end of the vertical guide rod, a spring baffle is arranged inside the mounting seat body, a second end plate is arranged at the lower end of the vertical guide rod, and the second limiting spring is arranged between the spring baffle and the second end plate.

[0007] The reset driving assembly comprises a reset button, a reset knob cover and a knob sliding shell, the knob sliding shell is arranged in the reset knob cover, a threaded portion is arranged on the outer wall of the knob sliding shell and is in threaded cooperation with the inner wall of the reset knob cover, the reset button is arranged in the knob sliding shell, and a button reset spring and the reset pin are arranged on the lower side of the reset button.

[0008] The vertical guide rod lock block is provided with side blocks on both sides, and cam driving clamping grooves are formed between the middle block and the side blocks on both sides, the side walls of the vertical guide rod on both sides of the slot are respectively inserted into the corresponding cam driving clamping grooves, the lock block driving element is a magnet, and the side blocks are matched and attracted with the corresponding lock block driving elements.

[0009] The reset pin is provided with a reset plug in the middle and matched with the reset slot, and the lower end surface of the reset plug is matched with the inner wall of the reset slot in a slope, and the reset pin is provided with a jump plug on both sides.

[0010] A temperature jump piece is arranged between the upper end of the reset button and the top plate of the knob sliding shell, when the gas self-closing valve encounters a high temperature condition, the reset button is driven to move downward through the temperature jump piece which is deformed by heat, the reset pin is driven to move downward through the reset button, and the jump plug is inserted into the cam driving clamping groove on the corresponding side and abuts against the cam.

[0011] The cam is provided with a mounting shaft at the front end, a cam top block abutting against the top rod is sleeved on the mounting shaft, and two cam protruding portions are arranged on the upper side of the front end of the cam and matched with the cam driving clamping grooves on the corresponding sides.

[0012] When the gas self-closing valve is in a normal open state, the vertical guide rod lock block abuts against the limiting block, and the cam protruding portion is inserted into the cam driving clamping groove on the vertical guide rod lock block.

[0013] When the gas self-closing valve is in a high pressure state, the vertical guide rod is driven to rise by the pressure diaphragm, the vertical guide rod lock block is inserted into the first cavity below the limiting block in the slot under the action of the lock block driving element, and the cam is driven to swing downward by the vertical guide rod lock block.

[0014] When the gas self-closing valve is in a low pressure state, the vertical guide rod is driven to descend by the lower concave of the pressure diaphragm, the vertical guide rod lock block is inserted into the second cavity above the limiting block in the slot under the action of the lock block driving element, and the cam is driven to swing downward by the vertical guide rod lock block.

[0015] The advantages and positive effects of the present application are:

[0016] 1. The present application drives the cam to swing by the cooperation of the vertical guide rod lock block and the limiting block on the vertical guide rod, and then drives the top rod abutting against the ball valve assembly to move, which is more sensitive in response. As long as the pressure diaphragm senses pressure abnormality and moves, the vertical guide rod lock block and the limiting block on the vertical guide rod are misaligned.

[0017] 2. After the vertical guide rod lock block and the limiting block on the vertical guide rod are misaligned, the vertical guide rod lock block is located above or below the limiting block in the slot of the vertical guide rod, and if the reset driving assembly is not started, the gas self-closing valve always remains in the locked-off state, and the locking after the gas is cut off is more reliable.

[0018] 3. The present application is provided with a temperature reed between the upper end of the reset button and the top plate of the knob sliding shell, so that the gas can be automatically cut off at high temperature.

[0019] 4. The present application can reset and unlock the vertical guide rod lock block by pressing the reset button or screwing the reset rotary cover, which is simple and convenient to operate. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a schematic view of the present application in a normal opening state of the gas self-closing valve,

[0021] Figure 2 is Figure 1 is an enlarged schematic view of the present application,

[0022] Figure 3 is Figure 2 is a perspective view of the present application,

[0023] Figure 4 is Figure 3 is a position schematic view of the lock block driving element in

[0024] Figure 5 is Figure 3 is a structure schematic view of the vertical guide rod in

[0025] Figure 6 is Figure 3 the vertical guide rod lock block structure in the schematic diagram,

[0026] Figure 7 is Figure 3 the cam structure in the schematic diagram,

[0027] Figure 8 is Figure 2 the schematic diagram of another angle structure of the present application in the,

[0028] Figure 9 is Figure 8 the reset bolt structure in the schematic diagram,

[0029] Figure 10 is the schematic diagram of the present application in the high pressure closing state of the gas self-closing valve,

[0030] Figure 11 is Figure 10 the enlarged schematic diagram of the present application in the,

[0031] Figure 12 is the schematic diagram of the present application in the low pressure state of the gas self-closing valve,

[0032] Figure 13 is Figure 12 the enlarged schematic diagram of the present application in the,

[0033] Figure 14 is the schematic diagram of the present application in the normal temperature state of the gas self-closing valve,

[0034] Figure 15 is the schematic diagram of the present application in the high temperature state of the gas self-closing valve,

[0035] Figure 16 is Figure 3 the position schematic diagram of the vertical guide rod lock block in different states in the.

[0036] Wherein, 1 is the valve body, 101 is the gas flow channel, 102 is the mounting base, 2 is the ball valve assembly, 201 is the ball valve return spring, 202 is the ball valve knob retaining block, 3 is the overcurrent shut-off valve core, 401 is the pressure diaphragm, 402 is the push rod, 403 is the temperature tap, 404 is the vertical guide rod, 4041 is the limit block, 4042 is the second cavity, 4043 is the first cavity, 4044 is the guide rod, 4045 is the first end plate, 4046 is the second end plate, 405 is the limit cover, and 406 is the reset valve. Button, 407 is reset pin, 4071 is reset block, 4072 is jumping block, 408 is reset rotating cover, 409 is cam drive slot, 410 is intermediate block, 411 is reset slot, 412 is vertical guide rod locking block, 413 is cam, 4131 is cam hinge, 4132 is mounting shaft, 4133 is cam top block, 414 is knob sliding housing, 415 is cam reset torsion spring, 416 is second limit spring, 417 is locking block drive element, 418 is first limit spring. Detailed Implementation

[0037] The invention will now be described in further detail with reference to the accompanying drawings.

[0038] like Figures 1-16 As shown, the present invention includes a vertical guide rod 404, a vertical guide rod locking block 412, a cam 413, a locking block driving element 417, a pressure diaphragm 401, a push rod 402, a reset pin 407, and a reset driving assembly, wherein... Figure 5 As shown, the vertical guide rod 404 has a slot, and a limiting block 4041 is provided in the slot, such as... Figure 2 , Figure 11 and Figure 13 As shown, the vertical guide rod locking block 412 is driven to move horizontally by a locking block driving element 417 located on the other side of the vertical guide rod 404, as follows: Figure 6 As shown, the vertical guide rod locking block 412 is provided with a middle block 410, and the middle block 410 is provided with a reset slot 411. Cam drive slots 409 are provided on both sides of the middle block 410. Figure 2 and Figure 7 As shown, the cam 413 is located on the lower side of the vertical guide rod locking block 412 and hinged to a cam hinge shaft 4131. The upper side of the cam 413 has a cam protrusion 4134, and the cam hinge shaft 4131 has a cam return torsion spring 415. Figures 1-2 As shown, the lower side of the reset drive assembly is provided with a reset pin 407 that mates with the reset slot 411, and the upper end of the vertical guide rod 404 is inserted into the reset drive assembly, while the lower end abuts against the pressure diaphragm 401. Figure 2 , Figure 11 and Figure 13As shown, the middle block 410 of the vertical guide rod locking block 412 is inserted into the slot, and the top rod 402 passes through the slot and abuts against the cam 413. In this embodiment, the locking block driving element 417 is a magnet, and the vertical guide rod locking block 412 is driven to move by magnetic attraction. The present invention can also use other structural forms of driving elements as needed, such as electromagnets.

[0039] When this invention is working, as Figure 2 As shown, when the gas self-closing valve is in the normal open state, the vertical guide rod locking block 412 abuts against the limiting block 4041, and at the same time, the cam protrusion 4134 inserts into the cam drive slot 409 on the vertical guide rod locking block 412 to achieve locking. At this time, the push rod 402 is driven forward by the cam 413 and keeps the ball valve assembly 2 at the other end in the open state. Figure 11 As shown, when the gas self-closing valve is in a high-pressure state, the pressure diaphragm 401 is driven to rise by the pressure, which in turn drives the vertical guide rod 404 to rise. At the same time, the limiting block 4041 inside the vertical guide rod 404 also rises. Figure 5 , Figure 11 and Figure 16 As shown, the vertical guide rod locking block 412 moves horizontally forward under the attraction of the locking block driving element 417 and inserts into the first cavity 4043 located below the limiting block 4041 inside the slot. The cam drive slot 409 on the vertical guide rod locking block 412 also moves forward and drives the cam 413 to swing downward, thereby causing the push rod 402 to retract and no longer press against the ball valve assembly 2 at the other end. The ball valve assembly 2 closes, and... Figure 13 As shown, when the gas self-closing valve is in a low-pressure state, the middle of the pressure diaphragm 401 is concave, which in turn drives the vertical guide rod 404 to descend. At the same time, the limiting block 4041 inside the vertical guide rod 404 also descends. Figure 5 , Figure 13 and Figure 16 As shown, the vertical guide rod locking block 412 moves forward and inserts into the second cavity 4042 located above the limiting block 4041 inside the slot under the attraction of the locking block driving element 417. The cam driving slot 409 on the vertical guide rod locking block 412 also moves forward and drives the cam 413 to swing downward, thereby causing the push rod 402 to retract and no longer press against the ball valve assembly 2 at the other end, and the ball valve assembly 2 is closed.

[0040] like Figure 1As shown, in this embodiment, the valve body 1 of the gas self-closing valve includes a gas flow channel 101, a mounting seat body 102, and a ball valve assembly 2, wherein the mounting seat body 102 and the ball valve assembly 2 are arranged on the upper side of the gas flow channel 101, and a guide groove for accommodating horizontal movement of the ejector rod 402 is arranged between the mounting seat body 102 and the ball valve assembly 2, one side of the knob of the ball valve assembly 2 is provided with a ball valve knob clamping block 202 for abutting against the ejector rod 402, and a ball valve return spring 201 is arranged inside the ball valve assembly 2 for driving the ball valve to automatically close when the ejector rod 402 is not tightly pressed, and an overflow cut-off valve core 3 is arranged in the gas flow channel 101 for automatically cutting off the gas flow channel 101 when the gas flow exceeds the flow, and the above-mentioned structures are all known technologies in the art, and in this embodiment, the above-mentioned structures are the same as those of the CN218267442U patent. The present application can also be installed on valve bodies of other structure types as needed.

[0041] The vertical guide rod 404, the vertical guide rod lock block 412, the cam 413, the lock block driving element 417, the reset pin 407, and the reset driving assembly are all arranged in the mounting seat body 102, as shown in Figure 1 As shown, in this embodiment, a first limiting spring 418 is arranged on the upper end of the vertical guide rod 404, and a second limiting spring 416 is arranged on the lower end of the vertical guide rod 404, and the vertical guide rod 404 reaches a balance under the joint action of the first limiting spring 418, the second limiting spring 416, and the pressure diaphragm 401 to enable the vertical guide rod lock block 412 to abut against the limiting block 4041 in the slot of the vertical guide rod 404. As shown in Figure 1 As shown, in this embodiment, the reset driving assembly includes a reset button 406, and the reset button 406 is internally provided with the first limiting spring 418 and a limiting gland 405, as shown in Figure 5 As shown, the upper end of the vertical guide rod 404 is provided with a first end plate 4045, and the first end plate 4045 is provided with a guide rod 4044, as shown in Figure 1 As shown, the limiting gland 405 abuts against the first end plate 4045, the first limiting spring 418 is arranged on the guide rod 4044 and between the top plate of the reset button 406 and the limiting gland 405, as shown in Figure 1 As shown, the inside of the mounting seat body 102 is provided with a spring baffle, as shown in Figure 5 As shown, the lower end of the vertical guide rod 404 is provided with a second end plate 4046, and the second limiting spring 416 is arranged between the spring baffle and the second end plate 4046.

[0042] As shown in Figure 1As shown, in the embodiment, the reset driving assembly comprises, in addition to the reset button 406, a reset knob cover 408 and a knob sliding shell 414, wherein the reset knob cover 408 is rotatably arranged on the upper side of the mounting seat body 102, the knob sliding shell 414 is arranged in the reset knob cover 408, and the outer wall of the knob sliding shell 414 is provided with a threaded portion which is threadedly matched with the inner wall of the reset knob cover 408, and the knob sliding shell 414 is driven to move up and down by rotating the reset knob cover 408, the reset button 406 is arranged in the knob sliding shell 414, and the lower side of the reset button 406 is provided with a button reset spring 419 and the reset pin 407, wherein the lower end of the button reset spring 419 abuts against the upper side of the mounting seat body 102 to realize floating of the reset button 406.

[0043] The embodiment can realize reset in two ways. Way one is to press down the reset button 406 to drive the reset pin 407 to move down and insert into the reset slot 411 on the vertical guide rod lock block 412, as shown in Figure 9 As shown, the reset pin 407 is provided with a reset block 4071 in the middle, and the lower end face of the reset block 4071 is obliquely matched with the inner wall of the reset slot 411, so that the vertical guide rod lock block 412 can be driven to move backward by the slope when the reset pin 407 descends, and the vertical guide rod 404 is restored to the original position under the action of the pressure diaphragm 401, that is, the limiting block 4041 is restored to the position corresponding to the abutment of the vertical guide rod lock block 412, and the reset button 406 is automatically lifted and reset under the action of the button reset spring 419, and the cam 413 is automatically swung upward and reset under the action of the cam reset torsional spring 415, so that the cam protruding portion 4134 is reinserted into the cam driving slot 409 on the vertical guide rod lock block 412 to realize locking. Way two is to rotate the reset knob cover 408 to drive the knob sliding shell 414 to move down, and the knob sliding shell 414 drives the reset button 406 and the reset pin 407 to move down, and this way can realize long-term locking of the gas self-closing valve.

[0044] As shown in Figure 6 In the embodiment, the vertical guide rod lock block 412 is provided with side blocks on both sides, and the cam driving slot 409 is formed between the middle block 410 and the side blocks on both sides, as shown in Figure 5 and Figure 8 As shown, the side walls on both sides of the slotted vertical guide rod 404 are respectively inserted into the corresponding cam driving slots 409, that is, the side blocks are arranged on the outer side of the vertical guide rod 404, as shown in Figure 3As shown, the two locking block driving elements 417 correspond to the side blocks on the corresponding sides to achieve the purpose of attracting the vertical guide rod locking block 412 to move horizontally, as follows. Figure 4 As shown, the lock block drive element 417 is disposed on the partition in the mounting base 102.

[0045] like Figures 14-15 As shown, a temperature spring plate 403 is provided between the upper end of the reset button 406 and the top plate of the knob sliding housing 414. When the gas self-closing valve is in the normal open state, the temperature spring plate 403 is in a concave state in the middle. When encountering high temperature, the temperature spring plate 403 deforms in the opposite direction, causing the concave part to jump upward. At the same time, the edge of the temperature spring plate 403 forms a downward thrust, pushing the reset button 406 downward. Figure 9 As shown, in addition to the reset block in the middle, the reset pin 407 also has jumping blocks 4072 on both sides. When the reset button 406 drives the reset pin 407 to move downward, the jumping blocks 4072 are respectively inserted into the corresponding cam drive slots 409 on the vertical guide rod locking block 412, so as to abut against the cam protrusion 4134 and drive the cam 413 to swing downward, thereby causing the push rod 402 to move backward and no longer press against the ball valve assembly 2, and the ball valve assembly 2 is closed. The pressure diaphragm 401 and the temperature jumper 403 are both known technologies in the art. In this embodiment, the pressure diaphragm 401 is the same as that in patent CN218267442U, and the temperature jumper 403 is made of shape memory metal. The temperature jumper 403 can also use components such as the shape memory spring in patent CN218267442U.

[0046] like Figure 7 As shown, in this embodiment, the front end of the cam 413 is provided with a mounting shaft 4132, and a cam top block 4133 is fitted on the mounting shaft 4132 for abutting against the top rod 402. The upper side of the front end of the cam 413 is provided with two cam protrusions 4134 corresponding to the cam drive slots 409 on both sides of the vertical guide rod locking block 412.

[0047] The working principle of this invention is as follows:

[0048] When this invention is working, as Figure 2 As shown, when the gas self-closing valve is in the normal open state, the vertical guide rod 404 reaches equilibrium under the combined action of the first limiting spring 418, the second limiting spring 416, and the pressure diaphragm 401. The vertical guide rod locking block 412 abuts against the limiting block 4041 on the vertical guide rod 404. At this time, the push rod 402 is driven forward by the cam 413, keeping the ball valve assembly 2 at the other end open. Figure 11As shown, when the gas self-closing valve is in a high pressure state, the pressure diaphragm 401 is driven to rise by pressure, and in turn drives the vertical guide rod 404 and the limiting block 4041 to rise. The vertical guide rod lock block 412 is horizontally moved forward under the attraction of the lock block driving element 417 and inserted into the first cavity 4043 below the limiting block 4041 in the slot. The cam driving clamping groove 409 on the vertical guide rod lock block 412 also moves forward and drives the cam 413 to swing downward, and in turn makes the top rod 402 retreat and no longer presses the ball valve assembly 2 at the other end, and the ball valve assembly 2 is closed. Figures 14-15 As shown, when the gas self-closing valve is in a low pressure state, the middle part of the pressure diaphragm 401 is concave, and in turn drives the vertical guide rod 404 to descend. At this time, the vertical guide rod lock block 412 moves forward under the attraction of the lock block driving element 417 and is inserted into the second cavity 4042 above the limiting block 4041 in the slot. The cam driving clamping groove 409 on the vertical guide rod lock block 412 moves forward and drives the cam 413 to swing downward, and in turn makes the top rod 402 retreat and no longer presses the ball valve assembly 2 at the other end, and the ball valve assembly 2 is closed. In addition, as shown, the temperature jump 403 is arranged between the upper end of the reset button 406 and the top plate of the rotary knob sliding shell 414. When the gas self-closing valve is normally opened, the temperature jump 403 is in a concave state. When high temperature occurs, the temperature jump 403 deforms reversely and pushes the reset button 406 to move downward. At this time, the jump blocks 4072 on both sides of the reset pin 407 are respectively inserted into the corresponding cam driving clamping grooves 409 on the vertical guide rod lock block 412 and abut against the cam protruding part 4134 to drive the cam 413 to swing downward, and in turn makes the top rod 402 retreat and no longer presses the ball valve assembly 2, and the ball valve assembly 2 is closed. ​ As shown, the temperature jump 403 is arranged between the upper end of the reset button 406 and the top plate of the rotary knob sliding shell 414. When the gas self-closing valve is normally opened, the temperature jump 403 is in a concave state. When high temperature occurs, the temperature jump 403 deforms reversely and pushes the reset button 406 to move downward. At this time, the jump blocks 4072 on both sides of the reset pin 407 are respectively inserted into the corresponding cam driving clamping grooves 409 on the vertical guide rod lock block 412 and abut against the cam protruding part 4134 to drive the cam 413 to swing downward, and in turn makes the top rod 402 retreat and no longer presses the ball valve assembly 2, and the ball valve assembly 2 is closed.

Claims

1. A gas shut-off valve cut-out drive mechanism characterised in that: The vertical guide rod (404) is provided with a slot, and a limiting block (4041) is arranged in the slot; the vertical guide rod lock block (412) is driven to move by the lock block driving element (417); the vertical guide rod lock block (412) is provided with an intermediate block (410); the intermediate block (410) is provided with a reset slot (411); the intermediate block (410) is provided with a cam driving clamping groove (409) on both sides; the intermediate block (410) is inserted into the slot on the vertical guide rod (404); the cam (413) is arranged on the lower side of the vertical guide rod lock block (412) and is hinged to a cam hinge shaft (4131); the upper side of the cam (413) is provided with a cam protruding part (4134); the cam hinge shaft (4131) is provided with a cam reset torsional spring (415); the top rod (402) passes through the slot and abuts against the cam (413); the reset driving assembly is provided with a reset pin (407) matched with the reset slot (411) on the lower side; and the upper end of the vertical guide rod (404) is inserted into the reset driving assembly, and the lower end abuts against the pressure diaphragm (401). The valve body (1) of the gas self-closing valve comprises a gas flow channel (101), a mounting seat body (102) and a ball valve assembly (2); the mounting seat body (102) and the ball valve assembly (2) are arranged on the upper side of the gas flow channel (101); a guide groove for horizontally moving the top rod (402) is arranged between the mounting seat body (102) and the ball valve assembly (2); the knob side of the ball valve assembly (2) is provided with a ball valve knob clamping block (202), and the ball valve knob clamping block (202) can abut against the top rod (402).

2. A gas self-closing valve shut-off drive mechanism according to claim 1, wherein: The vertical guide rod (404), the vertical guide rod lock block (412), the cam (413), the lock block driving element (417), the reset pin (407) and the reset driving assembly are arranged in the mounting seat body (102), the reset driving assembly comprises a reset button (406), the inside of the reset button (406) is provided with a first limiting spring (418) and a limiting gland (405), the upper end of the vertical guide rod (404) is provided with a first end plate (4045), the first end plate (4045) is provided with a guide rod (4044), the limiting gland (405) abuts against the first end plate (4045), the first limiting spring (418) is sleeved on the guide rod (4044) and arranged between the top plate of the reset button (406) and the limiting gland (405), the lower end of the vertical guide rod (404) is sleeved with a second limiting spring (416), the inside of the mounting seat body (102) is provided with a spring baffle, the lower end of the vertical guide rod (404) is provided with a second end plate (4046), and the second limiting spring (416) is arranged between the spring baffle and the second end plate (4046).

3. The gas shut-off valve actuation mechanism of claim 1, wherein: The reset driving assembly comprises a reset button (406), a reset knob cover (408) and a knob sliding shell (414), the knob sliding shell (414) is arranged in the reset knob cover (408), a threaded portion is arranged on the outer wall of the knob sliding shell (414) and is in threaded connection with the inner wall of the reset knob cover (408), the reset button (406) is arranged in the knob sliding shell (414), and a button reset spring (419) and the reset pin (407) are arranged on the lower side of the reset button (406).

4. A gas shut off valve drive mechanism according to claim 3, wherein: The vertical guide rod lock block (412) is provided with side blocks on both sides, and the cam driving clamping grooves (409) are formed between the middle block (410) and the side blocks on both sides, the side walls on both sides of the vertical guide rod (404) are inserted into the corresponding cam driving clamping grooves (409), the lock block driving element (417) is a magnet, and the side blocks are matched with the corresponding lock block driving elements (417) to be attracted.

5. A gas self-closing valve shut-off drive mechanism according to claim 4, characterised in that: The reset pin (407) is provided with a reset plug (4071) in the middle and matched with the reset slot (411), and the lower end surface of the reset plug (4071) is matched with the inner wall of the reset slot (411) in a bevel manner, and the reset pin (407) is provided with a jump plug (4072) on both sides.

6. A gas self-closing valve shut-off drive mechanism according to claim 5, wherein: The temperature jump piece (403) is arranged between the upper end of the reset button (406) and the top plate of the knob sliding shell (414), when the gas self-closing valve encounters a high temperature condition, the reset button (406) is driven to move downward through the temperature jump piece (403) which is deformed by heat, the reset pin (407) is driven to move downward through the reset button (406), and the jump plug (4072) is inserted into the corresponding cam driving clamping groove (409) and abuts against the cam (413).

7. The gas shut-off valve actuation mechanism of claim 1, wherein: The cam (413) is provided with a mounting shaft (4132) at the front end, and a cam top block (4133) is sleeved on the mounting shaft (4132) and abuts against the top rod (402), and the front end of the cam (413) is provided with two cam protrusions (4134) on the upper side and matched with the cam driving clamping grooves (409) on the corresponding side.

8. The gas shut off valve drive mechanism of claim 1, wherein: When the gas self-closing valve is in the normal opening state, the vertical guide rod lock block (412) abuts against the limiting block (4041), and the cam protrusions (4134) are inserted into the cam driving clamping grooves (409) on the vertical guide rod lock block (412).

9. The gas shut-off valve actuation mechanism of claim 1, wherein: When the gas self-closing valve is in the high pressure state, the vertical guide rod (404) is driven to rise by the pressure diaphragm (401), the vertical guide rod lock block (412) is inserted into the first cavity (4043) on the inside of the slot and below the limiting block (4041) under the action of the lock block driving element (417), and the cam (413) is driven to swing downward by the vertical guide rod lock block (412).

10. The gas shut off valve actuation mechanism of claim 1, wherein: When the gas self-closing valve is in the low pressure state, the vertical guide rod (404) is driven to descend by the concave part of the pressure diaphragm (401), the vertical guide rod lock block (412) is inserted into the second cavity (4042) on the inside of the slot and above the limiting block (4041) under the action of the lock block driving element (417), and the cam (413) is driven to swing downward by the vertical guide rod lock block (412).

Images