Gas safety valve

Abstract

The utility model belongs to the technical field of valves, and discloses a gas safety valve which comprises a valve body, a passing cavity is formed in the valve body, a gas inlet pipe is arranged on one side of the valve body and communicates with the passing cavity, a through hole is formed in the top of the valve body, a gas outlet pipe is arranged at the position, located at the through hole, of the top of the valve body, and a sliding rod is vertically arranged in the valve body in a sliding mode. The lower end of the sliding rod penetrates through the valve body and is provided with a first annular groove; a clamping plate is horizontally arranged at the bottom of the valve body in a sliding mode, the clamping plate is matched with the first annular groove, a driving assembly is arranged at the bottom of the valve body, a protective shell is arranged at the bottom of the valve body, and a gas sensitive sensor and an alarm are arranged outside the protective shell; one end of the sliding rod penetrates through the protective shell and is provided with a handle. The driving assembly drives the clamping plate to move, so that the clamping plate is separated from the first annular groove, the compression spring loses limitation to push the blocking block and the sliding rod to slide, the blocking block makes contact with the inner wall of the containing cavity, the through hole is blocked, and gas cannot pass through the through hole.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve technical field, especially a kind of gas safety valve. BACKGROUND

[0002] Gas stove is one of the most widely used kitchen appliances in kitchen appliances, natural gas is clean energy, no pollution to the environment, and gas stove has the characteristics of large firepower, high efficiency, and improper use of gas stove, often also some safety accidents.

[0003] In the Chinese utility model patent with the publication number CN214063913U, a kind of adjustable gas safety valve is disclosed, including shell, the side of shell is fixedly connected with gas outlet pipe, the other side of shell is fixedly connected with gas inlet pipe, the inside of shell is equipped with transmission plate, the bottom of transmission plate is fixedly connected with connecting piece, the two sides of transmission plate are all fixedly connected with sliding block, the inner wall of shell is equipped with sliding groove, sliding block is slidably connected with shell by sliding groove, the bottom of transmission plate two sides are all equipped with barrier mechanism, barrier mechanism includes electromagnet, sealing ball, sealing ring, iron block, fixed part, first telescopic rod, first spring, the top of transmission plate is fixedly connected with second telescopic rod, the outside of second telescopic rod is sleeved with second spring, the top of transmission plate two sides are all equipped with baffle, the side of baffle is fixedly connected with connecting rod, the side of connecting rod is fixedly connected with electric telescopic rod, the one end of electric telescopic rod is fixedly connected with fixed plate, electric telescopic rod moves baffle by connecting rod, baffle is separated from transmission plate, under the elastic stress of second spring, transmission plate is driven to move downward, transmission plate moves in sliding groove by sliding block, transmission plate drives connecting piece and barrier mechanism to move down, connecting piece is separated from gas outlet pipe and gas inlet pipe, at this moment, controller controls electromagnet to stop operation, magnetic force disappears and makes electromagnet separate from iron block, under the elastic stress of first spring, fixed part drives sealing ball and sealing ring to move and enter gas outlet pipe and gas inlet pipe, reach the effect of blocking gas.

[0004] For the related technology in the above, the inventors believe that the following defects exist: after the above-mentioned safety valve is started, the position of the transmission plate and the sealing ball is difficult to reset, which is not conducive to restoring the state of the safety valve to the initial state after maintenance is completed, affecting the normal use of the safety valve. UTILITY MODEL CONTENTS

[0005] In order to solve the above problems, the utility model provides a kind of gas safety valve.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a gas safety valve, including a valve body, a passage cavity provided inside the valve body, an air inlet pipe provided on one side of the valve body, the air inlet pipe communicating with the passage cavity, a through hole opened at the top of the valve body, an air outlet pipe provided at the through hole at the top of the valve body, a sliding rod vertically slidably provided inside the valve body, a blocking block provided at the top of the sliding rod, a compression spring sleeved on the sliding rod, the lower end of the sliding rod passing through the valve body and having a first annular groove, a retaining plate horizontally slidably provided at the bottom of the valve body, the retaining plate cooperating with the first annular groove, a driving assembly for driving the retaining plate to slide provided at the bottom of the valve body, a protective shell provided at the bottom of the valve body, a gas sensor and an alarm provided outside the protective shell, and a handle provided at one end of the sliding rod passing through the protective shell.

[0007] By adopting the above technical solution, a valve body, inlet pipe, outlet pipe, gas sensor, and alarm are installed. In the initial state, the block does not contact the inner wall of the passage cavity, and the clamping plate cooperates with the first annular groove to limit the position of the sliding rod and the block, ensuring that the gas can enter the passage cavity from the outlet pipe and then flow to the outlet pipe through the through hole. When a gas leak occurs, the gas sensor detects the abnormal concentration of external gas and transmits the signal to the controller. The controller activates the alarm for audible and visual alarm. At the same time, the drive component drives the clamping plate to move, causing the clamping plate to separate from the first annular groove. The compression spring loses its restraint and pushes the block and sliding rod to slide, causing the block to contact the inner wall of the receiving cavity and block the through hole, preventing the gas from passing through. After the maintenance is completed, the operator pulls the handle, causing the sliding rod and block to move and reset. The drive component drives the clamping plate to move and re-clamp into the first annular groove, fixing the sliding rod and thus fixing the block. The valve body is then unblocked, and the safety valve returns to its initial state without affecting its normal operation.

[0008] Furthermore, the top of the passage cavity is shaped like an inverted funnel, and the block is shaped like a frustum cone.

[0009] By adopting the above technical solution, the top of the passage cavity is set in an inverted funnel shape, and the entire plug is set in a frustum shape, which facilitates the cooperation between the plug and the passage cavity.

[0010] Furthermore, a plug is provided on the top of the plug, the diameter of the plug being the same as the diameter of the through hole, and a second annular groove is provided on the plug, and a sealing rubber ring is provided in the second annular groove, the sealing rubber ring abutting against the wall of the through hole.

[0011] By adopting the above technical solution, a plug column, a second annular groove, and a rubber ring are set up. When the plug block moves, it drives the plug column to move, so that the plug column is inserted into the through hole, and the sealing rubber ring abuts against the wall of the through hole, resulting in a better blocking and sealing effect.

[0012] Furthermore, the valve body is provided with an installation tube, the sliding rod is slidably connected to the installation tube, and the compression spring is sleeved on the rod body of the sliding rod located between the installation tube and the block. One end of the compression spring is connected to the installation tube and the other end is connected to the block.

[0013] By adopting the above technical solution, an installation tube is provided in the valve body to ensure the stability of the sliding rod sliding.

[0014] Furthermore, the bottom of the valve body is provided with two upright plates spaced apart, and two guide rods are provided between the two upright plates. Two guide holes are provided on the plate, and the guide holes are slidably connected to the corresponding guide rods.

[0015] By adopting the above technical solution, setting up a vertical plate, guide rod, and guide hole, the stability of the plate sliding is ensured.

[0016] Furthermore, there are two card plates, which are arranged symmetrically, and a semi-circular groove is provided on the adjacent side of each card plate.

[0017] Furthermore, the drive assembly includes a bidirectional threaded rod rotatably disposed between the two upright plates. The two clamping plates are respectively screwed to both sides of the bidirectional threaded rod through threaded holes. One end of the bidirectional threaded rod passes through the upright plate. A mounting seat is provided on one of the upright plates. A drive motor is horizontally disposed on the mounting seat. The output shaft of the drive motor is connected to the end of the bidirectional threaded rod that passes through the upright plate.

[0018] By adopting the above technical solution, a bidirectional threaded rod, a mounting base, and a drive motor are set up. The drive motor drives the bidirectional threaded rod to rotate. Since the two clamping plates are respectively connected to the two sides of the bidirectional threaded rod through threaded holes, when the bidirectional threaded rod rotates, the two clamping plates slide synchronously towards the middle of the bidirectional threaded rod or slide synchronously away from the middle of the bidirectional threaded rod.

[0019] Furthermore, the sliding rod has a third annular groove on the side of the first annular groove away from the block.

[0020] By adopting the above technical solution, a third annular groove is provided on one side of the sliding rod. When the drive motor drives the plate to move, the plate separates from the first annular groove. The sliding rod and the block move to block the through hole. At this time, the drive motor drives the plate to reset, so that the plate cooperates with the third annular groove to fix the sliding rod, thereby ensuring that the position of the block does not change and stably blocks the through hole.

[0021] In summary, this utility model has the following beneficial effects: It includes a valve body, an inlet pipe, an outlet pipe, a gas sensor, and an alarm. In the initial state, the block does not contact the inner wall of the passage cavity, and the clamping plate cooperates with the first annular groove to limit the position of the sliding rod and the block, ensuring that gas can enter the passage cavity from the outlet pipe and then flow to the outlet pipe through the through hole. When a gas leak occurs, the gas sensor detects the abnormal concentration of external gas and transmits the signal to the controller. The controller activates the alarm with sound and light. Simultaneously, the drive assembly moves the clamping plate, causing it to separate from the first annular groove. The compression spring, no longer restrained, pushes the block and sliding rod to slide, causing the block to contact the inner wall of the receiving cavity and block the through hole, preventing gas from passing through. After maintenance, the operator pulls the handle, moving the sliding rod and block back to their original positions. The drive assembly then moves the clamping plate, re-engaging it in the first annular groove to fix the sliding rod, thus fixing the block. The valve body is then cleared, and the safety valve returns to its initial state without affecting its normal operation. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0023] Figure 2 This is a schematic diagram of the internal structure of the valve body and protective shell according to an embodiment of this utility model;

[0024] Figure 3 This is a schematic diagram of the sliding rod and the blocking block in an embodiment of this utility model;

[0025] Figure 4 This is a schematic diagram of the structure of the card plate and drive assembly in an embodiment of this utility model.

[0026] In the diagram: 10. Valve body; 11. Through cavity; 12. Inlet pipe; 13. Through hole; 14. Outlet pipe; 20. Sliding rod; 21. Compression spring; 22. First annular groove; 23. Handle; 24. Third annular groove; 30. Block; 31. Blocking column; 32. Second annular groove; 33. Sealing rubber ring; 40. Clamping plate; 41. Guide hole; 42. Semicircular groove; 50. Drive assembly; 51. Bidirectional threaded rod; 52. Mounting base; 53. Drive motor; 60. Mounting tube; 70. Vertical plate; 71. Guide rod; 80. Protective shell; 81. Gas sensor; 82. Alarm. Detailed Implementation

[0027] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0028] like Figures 1-4 As shown in the figure, this application discloses a gas safety valve, including a valve body 10, an inlet pipe 12, an outlet pipe 14, a gas sensor 81, and an alarm 82. The valve body 10 has a passage chamber 11. The inlet pipe 12 is located on one side of the valve body 10 and communicates with the passage chamber 11. A through hole 13 is opened at the top of the valve body 10, communicating with the passage chamber 11. The outlet pipe 14 is located at the top of the valve body 10, at the through hole 13. A sliding rod 20 is vertically slidably arranged inside the valve body 10. A block 30 is provided at the top of the sliding rod 20, and a compression spring 21 is sleeved on the sliding rod 20. In the initial state, the block 30 does not contact the inner wall of the passage chamber 11, ensuring that gas can enter the passage chamber 11 from the outlet pipe 14 and then flow to the outlet pipe 14 through the through hole 13. The lower end of the sliding rod 20 passes through the valve body 10 and has a first annular groove 22. A retaining plate 40 is horizontally slidably mounted on the bottom of the valve body 10, and the retaining plate 40 cooperates with the first annular groove 22. The driving assembly 50 is located at the bottom of the valve body 10 and is used to drive the retaining plate 40 to slide. A protective shell 80 is provided at the bottom of the valve body 10. The gas sensor 81 and the alarm 82 are both located outside the protective shell 80. One end of the sliding rod 20 passes through the protective shell 80 and has a handle 23. In its initial state, the locking plate 40 engages with the first annular groove 22 to limit the positions of the sliding rod 20 and the block 30. When a gas leak occurs, the gas sensor 81 detects an abnormality in the external gas concentration and transmits the signal to the controller. The controller activates the alarm 82 for an audible and visual alarm. Simultaneously, the drive assembly 50 drives the locking plate 40 to move, causing it to separate from the first annular groove 22. The compression spring 21, no longer restrained, pushes the block 30 and the sliding rod 20 to slide, causing the block 30 to contact the inner wall of the receiving cavity and block the through hole 13, preventing gas from passing through. After maintenance, the operator pulls the handle 23, causing the sliding rod 20 and the block 30 to move and reset. The drive assembly 50 then drives the locking plate 40 to move again, causing it to re-engage in the first annular groove 22, fixing the sliding rod 20 and thus fixing the block 30. The valve body 10 is then cleared, and the safety valve returns to its initial state, without affecting its normal operation.

[0029] Specifically, the valve body 10 has two vertical plates 70 spaced apart at its bottom, with two guide rods 71 ​​positioned between them. Two guide holes 41 are formed on the clamping plate 40, and these holes 41 are slidably connected to the corresponding guide rods 71 ​​to ensure the stability of the clamping plate 40's sliding motion. There are two clamping plates 40 arranged symmetrically, with semi-circular grooves 42 formed on adjacent sides of each plate. The drive assembly 50 includes a bidirectional threaded rod 51 rotatably disposed between the two vertical plates 70. The two clamping plates 40 are helically connected to both sides of the bidirectional threaded rod 51 via threaded holes. When the bidirectional threaded rod 51 rotates, the two clamping plates 40 simultaneously slide towards the center of the bidirectional threaded rod 51 or simultaneously slide away from the center of the bidirectional threaded rod 51. One end of the bidirectional threaded rod 51 passes through the vertical plate 70. A mounting base 52 is provided on one of the vertical plates 70, and a drive motor 53 is horizontally mounted on the mounting base 52. The output shaft of the drive motor 53 is connected to the end of the bidirectional threaded rod 51 that passes through the vertical plate 70, and the drive motor 53 drives the bidirectional threaded rod 51 to rotate. The sliding rod 20 has a third annular groove 24 on the side of the first annular groove 22 away from the blocking block 30. When the drive motor 53 drives the clamping plate 40 to move, the clamping plate 40 separates from the first annular groove 22. The sliding rod 20 and the blocking block 30 move to block the through hole 13. At this time, the drive motor 53 drives the clamping plate 40 to reset, so that the clamping plate 40 cooperates with the third annular groove 24 to fix the sliding rod 20, thereby ensuring that the position of the blocking block 30 does not change and stably blocks the through hole 13.

[0030] During installation, the top of the cavity 11 is shaped like an inverted funnel, and the block 30 is shaped like a frustum, facilitating the fit between the block 30 and the cavity 11. A plug 31 is provided at the top of the block 30, with a diameter matching that of the through hole 13. A second annular groove 32 is formed on the plug 31, and a sealing rubber ring 33 is placed within the second annular groove 32. The sealing rubber ring 33 abuts against the wall of the through hole 13. When the block 30 moves, it moves the plug 31, causing the plug 31 to penetrate into the through hole 13, and the sealing rubber ring 33 abuts against the wall of the through hole 13, resulting in a better sealing effect.

[0031] In the specific configuration, an installation pipe 60 is provided inside the valve body 10, and the sliding rod 20 is slidably connected to the installation pipe 60 to ensure the stability of the sliding rod 20. A compression spring 21 is sleeved on the rod of the sliding rod 20 located between the installation pipe 60 and the block 30. One end of the compression spring 21 is connected to the installation pipe 60, and the other end is connected to the block 30. A sealing rubber tube is provided on the inner wall of the installation pipe 60, and the sliding rod 20 abuts against the inner wall of the sealing rubber tube to ensure that the gas cannot leak from the gaps in the installation pipe 60.

[0032] The operating principle of a gas safety valve in this embodiment is as follows: In the initial state, the plug 30 is not in contact with the inner wall of the passage cavity 11, and the clamping plate 40 cooperates with the first annular groove 22 to limit the position of the sliding rod 20 and the plug 30, ensuring that the gas can enter the passage cavity 11 from the gas outlet pipe 14, and then flow to the gas outlet pipe 14 through the through hole 13. When a gas leak occurs, the gas sensor 81 detects the abnormal concentration of the external gas and transmits the signal to the controller. The controller activates the alarm 82 to perform an audible and visual alarm. At the same time, the drive motor 53 is activated to drive the bidirectional threaded rod 51 to rotate, causing the two clamping plates 40 to slide, so that the clamping plates 40 separate from the first annular groove 22. The compression spring 21 loses its restraint and pushes the plug 30, the sliding rod 20, and the plug 31 to slide, so that the plug 30 contacts the inner wall of the receiving cavity, and the plug 31 inserts into the through hole 13, blocking the through hole 13 and preventing the gas from passing through. Subsequently, the drive motor 53 drives the clamping plate 40 to move, causing the clamping plate 40 to engage with the third annular groove 24 and fix the sliding rod 20. After the maintenance is completed, the staff starts the drive motor 53 to move the clamping plate 40, causing the clamping plate 40 to separate from the third annular groove 24. Then, the handle 23 is pulled, causing the sliding rod 20 and the block 30 to move and reset. The drive motor 53 then drives the clamping plate 40 to move again, re-clamping it into the first annular groove 22 to fix the sliding rod 20, thereby fixing the block 30. The valve body 10 is now unobstructed, and the safety valve returns to its initial state without affecting its normal use.

[0033] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A gas safety valve, characterized in that: The system includes a valve body (10), which has a passage cavity (11). An air inlet pipe (12) is provided on one side of the valve body (10), communicating with the passage cavity (11). A through hole (13) is provided at the top of the valve body (10), and an air outlet pipe (14) is provided at the through hole (13) at the top of the valve body (10). A sliding rod (20) is vertically slidably disposed within the valve body (10), with a block (30) at the top of the sliding rod (20). A compression spring (21) is sleeved on the sliding rod (20). The lower end of the moving rod (20) passes through the valve body (10) and has a first annular groove (22). A retaining plate (40) is horizontally slidably arranged at the bottom of the valve body (10). The retaining plate (40) cooperates with the first annular groove (22). A driving assembly (50) for driving the retaining plate (40) to slide is arranged at the bottom of the valve body (10). A protective shell (80) is arranged at the bottom of the valve body (10). A gas sensor (81) and an alarm (82) are arranged outside the protective shell (80). One end of the sliding rod (20) passes through the protective shell (80) and has a handle (23).

2. A gas safety valve according to claim 1, characterized in that: The top of the passage cavity (11) is shaped like an inverted funnel, and the block (30) is shaped like a frustum.

3. A gas safety valve according to claim 1, characterized in that: The top of the plug (30) is provided with a plug post (31), the diameter of the plug post (31) is the same as the diameter of the through hole (13), a second annular groove (32) is provided on the plug post (31), a sealing rubber ring (33) is provided in the second annular groove (32), and the sealing rubber ring (33) abuts against the wall of the through hole (13).

4. A gas safety valve according to claim 1, characterized in that: The valve body (10) is provided with an installation tube (60), the sliding rod (20) is slidably connected to the installation tube (60), and the compression spring (21) is sleeved on the rod of the sliding rod (20) located between the installation tube (60) and the block (30). One end of the compression spring (21) is connected to the installation tube (60), and the other end is connected to the block (30).

5. A gas safety valve according to claim 1, characterized in that: The valve body (10) has two upright plates (70) spaced apart at the bottom, and two guide rods (71) are provided between the two upright plates (70). The clamping plate (40) has two guide holes (41) and the guide holes (41) are slidably connected to the corresponding guide rods (71).

6. A gas safety valve according to claim 5, characterized in that: There are two card plates (40), which are arranged symmetrically, and a semi-circular groove (42) is provided on the adjacent side of each of the two card plates (40).

7. A gas safety valve according to claim 6, characterized in that: The drive assembly (50) includes a bidirectional threaded rod (51) rotatably disposed between two upright plates (70). The two clamping plates (40) are respectively connected to both sides of the bidirectional threaded rod (51) through threaded holes. One end of the bidirectional threaded rod (51) passes through the upright plate (70). One of the upright plates (70) is provided with a mounting base (52). A drive motor (53) is horizontally disposed on the mounting base (52). The output shaft of the drive motor (53) is connected to the end of the bidirectional threaded rod (51) that passes through the upright plate (70).

8. A gas safety valve according to claim 1, characterized in that: The sliding rod (20) has a third annular groove (24) on the side of the first annular groove (22) away from the block (30).

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