Safety gas self-closing valve

Abstract

The safety type gas self-closing valve structurally comprises a self-closing valve body, a gas inlet pipe and a gas outlet pipe, an assembly opening communicated with the interior of the self-closing valve body is formed in the upper end face of the gas outlet pipe, a valve rod is rotationally arranged in the assembly opening, and the end, located in the self-closing valve body, of the valve rod is connected with a valve element assembly. The end, located outside the self-closing valve body, of the valve rod is connected with a rotary knob, and a limiting assembly used for locking or unlocking the rotary knob is arranged on the outer side of the assembling opening. According to the gas self-closing valve, the knob is rotated to control opening and closing of the pipeline, the limiting assembly is further arranged on the outer side of the assembly opening and used for locking or unlocking the knob, when the knob is in the locked state, wrong opening and closing caused by external force collision can be avoided, and the use safety and practicability of the gas self-closing valve are effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of gas self-closing valves, and more specifically, to a safety gas self-closing valve. Background Art

[0002] The pipeline gas self-closing valve, referred to as the self-closing valve, is installed on the pipeline of the low-pressure gas system. When the pipeline gas supply pressure is under-pressure or over-pressure, it can automatically close without electricity or other external power and must be opened manually.

[0003] The existing gas self-closing valve will add a manual switch near the gas outlet to facilitate the user to manually control the opening and closing of the pipeline. For example, a Chinese patent with a publication (announcement) number of CN219774904U discloses a gas self-closing valve with a manual switch structure, including a valve body, an air inlet and an air outlet are arranged on both sides of the valve body, a valve cavity is arranged in the middle of the valve body, and a handle that can rotate along its central axis is arranged at the upper end of the valve body near the gas outlet. A valve stem that penetrates the inside of the valve body is fixedly connected below the handle, and the part of the valve stem located in the valve body has a working section arranged in a cam structure, and a valve core assembly is fixed between the valve stem and the valve cavity in the valve body;

[0004] The above-mentioned gas self-closing valve with a manual switch structure has a manual switch structure near the gas outlet. When in use, the gas circuit can be closed and opened by rotating the handle, which is convenient for customers to actively control the opening and closing of the gas circuit. However, in actual use, since the rotating handle does not have a locking function, the rotating handle is easy to cause the valve core assembly to change its working state when it is hit by external force, thereby causing the manual switch structure to be opened and closed incorrectly, affecting the safety of the gas self-closing valve. Utility Model Content

[0005] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a safe gas self-closing valve to solve the above technical problems.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a safe gas self-closing valve, comprising a self-closing valve body, an air inlet pipe and an air outlet pipe, the upper end surface of the air outlet pipe is formed with an assembly port which is connected to the interior of the self-closing valve body, a valve stem is rotatably arranged in the assembly port, one end of the valve stem located in the self-closing valve body is connected to a valve core assembly, the other end of the valve stem located outside the self-closing valve body is connected to a knob, and a limit assembly for locking or unlocking the knob is arranged on the outside of the assembly port.

[0007] The utility model is further configured as follows: the limit assembly includes a movable piece rotatably arranged on the outer side wall of the assembly opening, one end of the movable piece is formed with a limit tooth, the lower end of the knob is formed with an extension part adapted to the assembly opening, and the outer peripheral surface of the extension part is equidistant and spaced apart with a plurality of limit grooves adapted to the limit teeth.

[0008] The utility model is further configured as follows: a matching portion is formed on one side of the movable sheet, a pivot is fixedly provided at the center of the matching portion, two fixing ears are correspondingly provided on the outer side of the assembly opening, and the pivot is rotatably installed between the two fixing ears.

[0009] The utility model is further configured as follows: an arc-shaped pressing portion is formed on one end of the movable sheet away from the limiting tooth, a fixed seat is installed at a position corresponding to the arc-shaped pressing portion on the outer side of the assembly opening, a top column is telescopically arranged in the fixed seat, and a spring member is fixedly arranged between the inner end surface of the top column and the inner bottom wall of the fixed seat.

[0010] The utility model is further configured as follows: the valve core assembly comprises a switch ball, two sealing pads are correspondingly installed on both sides of the switch ball, and a locking joint for pressing the sealing pad is also threadedly connected to the outer side of the air outlet pipe.

[0011] The utility model is further configured as follows: a receiving recess is formed on the top surface of the knob and a fastening through hole is provided on the bottom surface of the receiving recess; a threaded hole is provided on the upper end of the valve stem at a position corresponding to the fastening through hole and a fastener is connected to the threaded hole.

[0012] The utility model is further configured that: an identification block is installed at the opening of the accommodating recess.

[0013] To sum up, the utility model has the following beneficial effects: the utility model controls the opening and closing of the pipeline by turning the knob, and a limit assembly is also provided on the outside of the assembly port. The limit assembly is used to lock or unlock the knob, and when the knob is in the locked state, it will not cause incorrect opening and closing due to external force collision, thereby effectively improving the safety and practicality of the gas self-closing valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 It is a schematic cross-sectional view of the internal structure of the air outlet pipe of the utility model;

[0017] Figure 3 for Figure 2 A schematic diagram of the enlarged local structure at point A in the middle.

[0018] Figure numerals: 1. Self-closing valve body; 10. Air inlet pipe; 11. Air outlet pipe; 2. Assembly port; 20. Valve stem; 21. Knob; 22. Extension portion; 23. Limiting groove; 24. Fastening through hole; 25. Threaded hole; 26. Fastener; 27. Identification block; 28. Accommodating recess; 3. Movable sheet; 30. Limiting tooth; 31. Fitting portion; 32. Pivot; 33. Fixing ear; 34. Arc-shaped pressing portion; 35. Fixed seat; 36. Top column; 37. Spring member; 4. Switch ball; 40. Sealing pad; 41. Locking joint. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] See also Figure 1-3 As shown, a safety gas self-closing valve of an embodiment of the utility model includes a self-closing valve body 1, an air inlet pipe 10 and an air outlet pipe 11. The upper end surface of the air outlet pipe 11 is formed with an assembly port 2 which is connected to the inside of the self-closing valve body 1. A valve stem 20 is rotatably arranged in the assembly port 2. One end of the valve stem 20 located in the self-closing valve body 1 is connected to a valve core assembly, and one end of the valve stem 20 located outside the self-closing valve body 1 is connected to a knob 21. A limit assembly for locking or unlocking the knob 21 is arranged on the outside of the assembly port 2.

[0021] When in use, the utility model safety gas self-closing valve is installed in a preset position. When the opening and closing of the gas pipeline needs to be manually controlled, the knob 21 is turned forward or reversely, and the knob 21 drives the valve stem 20 to rotate, and the valve stem 20 drives the valve core assembly to rotate to control the opening and closing of the pipeline. A limit assembly is also provided on the outer side of the assembly port 2, and the limit assembly is used to lock or unlock the knob 21. When the knob 21 is in a locked state, it will not cause incorrect opening and closing due to external force collision, thereby effectively improving the safety and practicality of the gas self-closing valve.

[0022] The limiting assembly includes a movable piece 3 rotatably arranged on the outer wall of the assembly opening 2, a limiting tooth 30 is formed at one end of the movable piece 3, an extension portion 22 adapted to the assembly opening 2 is formed at the lower end of the knob 21, and a plurality of limiting grooves 23 adapted to the limiting tooth 30 are equidistant and spaced apart on the outer circumference of the extension portion 22; a matching portion 31 is formed on one side of the movable piece 3, a pivot 32 is fixedly penetrated at the center of the matching portion 31, two fixing ears 33 are correspondingly arranged on the outer side of the assembly opening 2, and the pivot 32 is rotatably installed between the two fixing ears 33; an arc-shaped pressing portion 34 is formed at the end of the movable piece 3 away from the limiting tooth 30, a fixed seat 35 is installed at the outer side of the assembly opening 2 at a position corresponding to the arc-shaped pressing portion 34, a top column 36 is telescopically arranged in the fixed seat 35, and a spring member 37 is fixedly arranged between the inner end surface of the top column 36 and the inner bottom wall of the fixed seat 35.

[0023] When in use, the top column 36 is telescopically arranged in the fixed seat 35, specifically, a movable groove is formed on one side of the fixed seat 35, and an annular groove extends from the inner circumference of the movable groove, the top column 36 is adapted to the movable groove, and an annular portion adapted to the annular groove is extended from the inner end head, and the movable path of the top column 36 is guided and limited by the cooperation between the annular groove and the annular portion, and the two ends of the spring member 37 are respectively fixedly connected to the inner end surface of the top column 36 and the bottom wall of the movable groove; in the initial state, the top column 36 is pushed out of the fixed seat 35 due to the action force of the spring member 37 and abuts against the arc-shaped pressing portion 34 of the movable sheet 3, at this time, the other end of the movable sheet 3 contacts the extension portion 22 of the knob 21, and in the above state, the limiting tooth 30 of the movable sheet 3 forms a limiting clamp with one of the limiting grooves 23 on the outer circumference of the extension portion 22 to achieve the locking of the knob 21;

[0024] When it is necessary to release the lock of the knob 21, the arc-shaped pressing portion 34 is pressed toward the side of the assembly opening 2. The arc-shaped pressing portion 34 causes the top column 36 to overcome the force of the spring member 37 and retract into the fixed seat 35. The movable sheet 3 drives the limiting tooth 30 to withdraw from the corresponding limiting groove 23 through the rotation cooperation between the pivot 32 and the two fixing ears 33. At this time, the knob 21 is unlocked and can rotate freely.

[0025] The valve core assembly includes a switch ball 4 , and two sealing pads 40 are correspondingly installed on both sides of the switch ball 4 . A locking joint 41 for pressing the sealing pads 40 is also threadedly connected to the outer side of the air outlet pipe 11 .

[0026] When in use, the locking joint 41 is fixedly installed on the outer port of the exhaust pipe 11 through a threaded connection. When the locking joint 41 is in the installed state, the sealing gasket 40 on one side presses the switch ball 4, and the switch ball 4 presses the sealing gasket 40 on the other side. Through the cooperation between the two sealing gaskets 40 and the switch ball 4, the switch ball 4 is ensured to open and close stably and the sealing effect when the switch ball 4 is closed is improved.

[0027] The knob 21 has a top surface formed with an accommodating recess 28 and a fastening through hole 24 formed in the bottom surface of the accommodating recess 28 . The valve stem 20 has a threaded hole 25 formed at a position corresponding to the fastening through hole 24 and a fastener 26 connected to the threaded hole 25 .

[0028] When in use, the knob 21 and the valve stem 20 are molded with assembly recesses on their mounting sides. When installing the knob 21, align the assembly recess with the valve stem 20 and push it in. Then, pass the fastener 26 (bolt or screw) through the accommodating recess 28, the fastening through hole 24 and the assembly recess and then tighten it with the threaded hole 25 to complete the installation and fixation of the knob 21.

[0029] An identification block 27 is installed at the opening of the accommodating recess 28 .

[0030] When in use, the identification block 27 indicates the current open or closed state of the knob 21, so that the staff can more intuitively obtain the use state of the knob 21, thereby improving the convenience of using the product; further, the identification block 27 can protect the fastener 26 to prevent the fastener 26 from rusting due to contact with external air or water.

[0031] It should also be pointed out that the terms used in the present invention, such as “front”, “rear”, “vertical”, “horizontal”, etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are only used to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention.

[0032] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A safety gas self-closing valve, comprising a self-closing valve body (1), an air inlet pipe (10) and an air outlet pipe (11), characterized in that: The upper end surface of the air outlet pipe (11) is formed with an assembly opening (2) which is in communication with the interior of the self-closing valve body (1); a valve stem (20) is rotatably arranged in the assembly opening (2); one end of the valve stem (20) located inside the self-closing valve body (1) is connected to a valve core assembly; one end of the valve stem (20) located outside the self-closing valve body (1) is connected to a knob (21); and a limit assembly for locking or unlocking the knob (21) is arranged outside the assembly opening (2).

2. The safety gas self-closing valve according to claim 1 is characterized in that: The limiting assembly comprises a movable sheet (3) rotatably arranged on the outer side wall of the assembly opening (2), one end of the movable sheet (3) is formed with a limiting tooth (30), the lower end of the knob (21) is formed with an extension portion (22) adapted to the assembly opening (2), and the outer peripheral surface of the extension portion (22) is provided with a plurality of limiting grooves (23) adapted to the limiting tooth (30) at equal distances and intervals.

3. The safety gas self-closing valve according to claim 2 is characterized in that: A matching portion (31) is formed on one side of the movable sheet (3), a pivot (32) is fixedly provided at the center of the matching portion (31), two fixing ears (33) are correspondingly provided on the outer side of the assembly opening (2), and the pivot (32) is rotatably installed between the two fixing ears (33).

4. The safety gas self-closing valve according to claim 3 is characterized in that: An arc-shaped pressing portion (34) is formed at one end of the movable sheet (3) away from the limiting tooth (30), a fixing seat (35) is installed at a position corresponding to the arc-shaped pressing portion (34) outside the assembly opening (2), a top column (36) is telescopically arranged inside the fixing seat (35), and a spring member (37) is fixedly arranged between the inner end surface of the top column (36) and the inner bottom wall of the fixing seat (35).

5. The safety gas self-closing valve according to claim 1 is characterized in that: The valve core assembly comprises a switch ball (4), two sealing pads (40) are correspondingly mounted on both sides of the switch ball (4), and a locking joint (41) for pressing the sealing pad (40) is also threadedly connected to the outer side of the air outlet pipe (11).

6. The safety gas self-closing valve according to claim 1 is characterized in that: The top surface of the knob (21) is formed with a receiving recess (28), and the bottom surface of the receiving recess (28) is provided with a fastening through hole (24); the upper end of the valve stem (20) is provided with a threaded hole (25) at a position corresponding to the fastening through hole (24), and the threaded hole (25) is connected to a fastener (26).

7. The safety gas self-closing valve according to claim 6 is characterized in that: An identification block (27) is installed at the opening of the accommodating recess (28).

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