Anti-misoperation natural gas stop valve

Abstract

This utility model relates to the field of natural gas valve technology and discloses a natural gas shut-off valve designed to prevent misoperation. This valve, by incorporating an anti-misoperation mechanism, locks the threaded sleeve, thereby restricting the upward and downward movement of the valve stem. This effectively prevents unauthorized personnel from misoperating or accidentally touching the valve, thus improving its safety and reliability and reducing the risk of natural gas leaks and other safety accidents. The spring and magnetic block in the locking mechanism make locking and unlocking operations more convenient and reliable. The spring enables automatic reset of the compression rod, and the magnetic block assists in the retraction and reset of the positioning rod, ensuring stable operation of the locking mechanism. The operating components include a rotating handwheel and an operating ball. The rotating handwheel facilitates the movement of the valve stem during normal operation, while the operating ball requires a special tool to rotate, further enhancing the anti-misoperation effect.

Description

Technical Field

[0001] This utility model relates to the field of natural gas valve technology, specifically a natural gas shut-off valve designed to prevent misoperation. Background Technology

[0002] In natural gas transmission systems, shut-off valves are key devices for controlling the flow and cut-off of natural gas. The accuracy and safety of their operation are directly related to the stability and safety of natural gas transmission.

[0003] Currently, most common natural gas shut-off valves on the market are operated by simple handwheels, lacking effective anti-misoperation mechanisms. In actual use, due to accidental contact by personnel or unauthorized operation by non-professionals, the shut-off valve is easily opened or closed by mistake. This may not only cause interruption of natural gas supply and affect normal gas use, but may also lead to safety accidents such as natural gas leaks, posing a significant safety hazard.

[0004] To address the aforementioned problems, this utility model proposes a natural gas shut-off valve designed to prevent misoperation. Utility Model Content

[0005] To address the problems mentioned in the background section, this utility model provides a natural gas shut-off valve designed to prevent misoperation. By incorporating a dedicated anti-misoperation mechanism, it effectively avoids unauthorized and erroneous operations, thereby improving the safety and reliability of the natural gas shut-off valve.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a natural gas shut-off valve for preventing misoperation, comprising a valve body, a valve stem, a valve core, an operating component, and a misoperation prevention mechanism; The valve body is provided with a natural gas flow channel, the valve core is located in the flow channel, one end of the valve stem is connected to the valve core, and the other end extends to the outside of the valve body and is connected to the operating components. The operating component is located at one end of the valve stem and is used to operate the shut-off valve; The anti-misoperation mechanism is located inside the valve stem.

[0007] Preferably, the anti-misoperation mechanism includes a threaded sleeve, a limiting ring, a limiting groove, a locking mechanism, and a fixed seat. The fixed seat is installed above the valve body. The threaded sleeve is fitted onto the surface of the valve stem, and the outer surface of the threaded sleeve is screwed into a threaded hole in the fixed seat. The limiting ring is installed on the surface of the valve stem, and the limiting groove is formed on the inner wall of the threaded sleeve. The limiting ring rotates within the limiting groove formed on the inner wall of the threaded sleeve. The locking mechanism is located inside the valve stem and is used to lock the threaded sleeve.

[0008] Preferably, the locking mechanism includes a pressing rod, a positioning rod, a positioning hole, and a control screw. The pressing rod is disposed in a slot inside the valve stem. Two positioning rods are disposed at the bottom of the valve stem below the pressing end of the pressing rod. The positioning rod slides in a through hole on the surface of the valve stem. The telescopic end of the positioning rod abuts against a positioning hole on the inner wall of the sleeve. The pressing rod presses the positioning rod to abut against the positioning hole, thereby locking the sleeve. The control screw is screwed to the top of the valve stem and abuts against one end of the pressing rod.

[0009] Preferably, a spring is provided at one end of the extrusion rod near the control screw, and the two ends of the spring are respectively connected to the inner wall of the valve stem and the extrusion rod, and the spring is wound around the outer surface of the control screw.

[0010] Preferably, the ends of the positioning rods that are close to each other are provided with a beveled structure, and a magnetic block is installed at the ends of the two positioning rods that are close to each other. The magnetic block will be used to retract the two positioning rods.

[0011] Preferably, a limiting block is installed at the bottom of the positioning rod, and the limiting block slides in a blind groove opened inside the valve stem.

[0012] Preferably, the operating assembly includes a rotating handwheel mounted on the end of the valve stem and an operating ball mounted on the end of the control screw, wherein the surface of the operating ball has a through hole for rotating the operating ball.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: This anti-misoperation natural gas shut-off valve features an anti-misoperation mechanism that locks the screw sleeve, restricting the valve stem's movement and effectively preventing unauthorized personnel from accidentally opening or closing the valve. This improves the safety and reliability of the shut-off valve and reduces the risk of natural gas leaks and other safety accidents. The spring and magnetic block in the locking mechanism make locking and unlocking operations more convenient and reliable. The spring automatically resets the compression rod, and the magnetic block assists the positioning rod in retracting and resetting, ensuring stable operation of the locking mechanism. The operating components include a handwheel and an operating ball. The handwheel facilitates valve stem movement during normal operation, while the operating ball requires a special tool to rotate, further enhancing the anti-misoperation effect and preventing unauthorized personnel from arbitrarily operating the control screw. The overall structure is rationally designed, with tight fit between components, simple and easy-to-understand operation, and convenient installation and maintenance. It can be widely used in natural gas transmission systems. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the internal cross-sectional structure of the valve stem in this utility model; Figure 3 In this utility model Figure 2 Enlarged structural diagram at point A; Figure 4 In this utility model Figure 2 Enlarged view of the structure at point B; Figure 5 This is a schematic diagram of the anti-misoperation mechanism in this utility model.

[0015] In the diagram: 1. Valve body; 11. Flow channel; 2. Valve stem; 3. Valve core; 4. Operating components; 41. Rotating handwheel; 42. Operating ball; 5. Anti-misoperation mechanism; 51. Screw sleeve; 52. Limit ring; 53. Limit groove; 54. Locking mechanism; 541. Pressing rod; 542. Positioning rod; 543. Positioning hole; 544. Limit block; 545. Control screw; 55. Fixing seat. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] like Figures 1 to 5 As shown, this utility model provides a natural gas shut-off valve to prevent misoperation, including a valve body 1, a valve stem 2, a valve core 3, an operating component 4, and a misoperation prevention mechanism 5; The valve body 1 is provided with a natural gas flow channel 11, the valve core 3 is located in the flow channel 11, one end of the valve stem 2 is connected to the valve core 3, and the other end extends to the outside of the valve body 1 and is connected to the operating component 4; the operating component 4 is located at one end of the valve stem 2 and is used to operate the shut-off valve; the anti-misoperation mechanism 5 is located inside the valve stem 2.

[0018] The anti-misoperation mechanism 5 includes a threaded sleeve 51, a limiting ring 52, a limiting groove 53, a locking mechanism 54, and a fixed seat 55. The fixed seat 55 is installed above the valve body 1. The threaded sleeve 51 is fitted onto the surface of the valve stem 2, and the outer surface of the threaded sleeve 51 is screwed into the threaded hole of the fixed seat 55. The limiting ring 52 is installed on the surface of the valve stem 2, and the limiting groove 53 is formed on the inner wall of the threaded sleeve 51. The limiting ring 52 rotates within the limiting groove 53 on the inner wall of the threaded sleeve 51. The locking mechanism 54 is located inside the valve stem 2. The screw sleeve 51 is locked. The screw sleeve 51 is a key component for controlling the raising and lowering of the valve stem 2. The screw sleeve 51 is screwed to the fixed seat 55. Through the setting of the limiting ring 52 and the limiting groove 53, the limiting ring 52 rotates in the limiting groove 53 opened in the inner wall of the screw sleeve 51. The cooperation between the limiting ring 52 and the limiting groove 53 allows the valve stem 2 to rotate relative to the screw sleeve 51 when the locking mechanism 54 is not engaged, which has the effect of preventing misoperation. When the locking mechanism 54 is engaged, the screw sleeve 51 rises and falls, which can drive the valve stem 2 to rise and fall synchronously.

[0019] The locking mechanism 54 includes a pressing rod 541, a positioning rod 542, a positioning hole 543, and a control screw 545. The pressing rod 541 is installed in a slot inside the valve stem 2. Two positioning rods 542 are installed at the bottom of the valve stem 2 below the pressing end of the pressing rod 541. The positioning rods 542 slide in a through hole on the surface of the valve stem 2. The telescopic end of the positioning rod 542 abuts against the positioning hole 543 on the inner wall of the screw sleeve 51. The pressing rod 541 presses the positioning rod 542 so that it is aligned with the positioning hole 543. The three parts abut against each other, thereby locking the sleeve 51. The control screw 545 is screwed to the top of the valve stem 2. The control screw 545 abuts against one end of the pressing rod 541. Rotating the control screw 545 can push the pressing rod 541 to move in the slot, thereby controlling the pressing state of the pressing rod 541 on the positioning rod 542, so that the positioning rod 542 is inserted into the positioning hole 543, locking the sleeve 51 on the surface of the valve stem 2, thereby facilitating the opening and closing operation of the valve stem 2.

[0020] It should be noted that a spring 546 is provided at one end of the extrusion rod 541 near the control screw 545. The two ends of the spring 546 are connected to the inner wall of the valve rod 2 and the extrusion rod 541, respectively. The spring 546 is wound around the outer surface of the control screw 545. By setting the spring 546, the extrusion rod 541 can be automatically reset.

[0021] It should be noted that the ends of the positioning rods 542 that are close to each other are both designed with a beveled structure, and magnetic blocks are installed on the ends of the two positioning rods 542 that are close to each other. The magnetic blocks are used to retract the two positioning rods 542. After the squeezing rod 541 automatically resets, the magnetic blocks can drive the two positioning rods 542 to retract and reset.

[0022] It should be noted that a limiting block 544 is installed at the bottom of the positioning rod 542. The limiting block 544 slides in the blind groove opened inside the valve stem 2, which serves to limit the positioning rod 542.

[0023] like Figures 1 to 4 As shown, the operating component 4 includes a rotating handwheel 41 installed at the end of the valve stem 2 and an operating ball 42 installed at the end of the control screw 545. The surface of the operating ball 42 has a through hole for rotating the operating ball 42. Rotating the handwheel 41 can directly drive the valve stem 2 to rotate, thereby controlling the position of the valve core 3. By inserting a tool into the through hole of the operating ball 42 and rotating the operating ball 42, the control screw 545 can be driven to rotate, thereby controlling the state of the anti-misoperation mechanism 5.

[0024] Working principle and process: When the shut-off valve needs to be operated, a special tool is inserted into the through hole on the surface of the operating ball 42. The operating ball 42 is rotated, which drives the control screw 545 to rotate clockwise. The control screw 545 moves downward under the action of the thread, pushing the pressing rod 541 to slide downward. The spring 546 is stretched, and the wedge-shaped structure at the lower end of the pressing rod 541 gradually increases the pressing force on the positioning rod 542. When the control screw 545 continues to move downward, after the pressing rod 541 moves downward to a certain position, the attraction between the magnetic blocks at the inner end of the positioning rod 542 is less than the pressing force of the pressing rod 541. The two positioning rods 542 move away from each other under the force of the pressing rod 541, and the outer end of the positioning rod 542 is inserted into the positioning hole 543. Lock the screw sleeve 51 to the valve stem 2. Then, rotate the handwheel 41 to rotate the valve stem 2. Since the screw sleeve 51 and the fixed seat 55 are connected by threads, when the valve stem 2 rotates, the screw sleeve 51 rotates and rises and falls on the fixed seat 55 through the cooperation of the limiting ring 52 and the limiting groove 53. This causes the valve stem 2 and the valve core 3 to rise and fall synchronously, realizing the opening or closing operation of the shut-off valve. When the control screw 545 is operated in the reverse direction, the pressing rod 541 moves upward under the contraction of the spring 546, the two positioning rods 542 are released from the limit, and they contract with each other under the mutual attraction of the magnetic blocks. The valve stem 2 and the screw sleeve 51 rotate with each other. By rotating the valve stem 2, the position of the valve core 3 remains unchanged, which can effectively prevent misoperation.

[0025] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A misoperation-proof natural gas stop valve, characterized by: It includes a valve body (1), a valve stem (2), a valve core (3), an operating component (4), and an anti-misoperation mechanism (5); the valve body (1) is provided with a natural gas flow channel, the valve core (3) is located in the flow channel, one end of the valve stem (2) is connected to the valve core (3), and the other end extends to the outside of the valve body (1) and is connected to the operating component (4). The operating component (4) is located at one end of the valve stem (2) and is used to operate the shut-off valve. The anti-misoperation mechanism (5) is located inside the valve stem (2). The anti-misoperation mechanism (5) includes a fixed seat (55), a screw sleeve (51), and a locking mechanism (54). The fixed seat (55) is installed on the valve body (1). The screw sleeve (51) is sleeved on the valve stem (2) and screwed to the fixed seat (55). The valve stem (2) is rotatably connected to the screw sleeve (51) and axially limited. The locking mechanism (54) is located inside the valve stem (2) and has a locking end that can extend and retract radially. The inner wall of the screw sleeve (51) is provided with a positioning hole (543) that matches the locking end. When the locking mechanism (54) is activated, its locking end extends into the positioning hole (543) to lock the screw sleeve (51), thereby restricting the lifting and lowering movement of the valve stem (2).

2. The natural gas shut-off valve for preventing misoperation according to claim 1, characterized in that: The rotatable connection and axial limiting structure between the valve stem (2) and the screw sleeve (51) includes a limiting ring (52) disposed on the surface of the valve stem (2) and a limiting groove (53) opened on the inner wall of the screw sleeve (51). The limiting ring (52) is rotatably disposed in the limiting groove (53).

3. A natural gas shut-off valve for preventing misoperation according to claim 1, characterized in that: The locking mechanism (54) includes a pressing rod (541), a positioning rod (542), and a control screw (545). The positioning rod (542) is slidably disposed in the through hole opened on the surface of the valve stem (2), and the outer end of the positioning rod (542) constitutes a locking end. The pressing rod (541) is slidably disposed in the valve stem (2), and its pressing end abuts against the inner end of the positioning rod (542) to push the positioning rod (542) to extend radially. The control screw (545) is screwed to the top of the valve stem (2), and its inner end abuts against the pressing rod (541) to drive the pressing rod (541) to slide axially.

4. The misoperation prevention natural gas shut-off valve according to claim 3, characterized in that: A spring (546) is provided at one end of the extrusion rod (541) near the control screw (545). The two ends of the spring (546) are connected to the inner wall of the valve stem (2) and the extrusion rod (541) respectively, so as to realize the automatic reset of the extrusion rod (541).

5. A natural gas shut-off valve for preventing misoperation according to claim 3, characterized in that: There are two positioning rods (542). The two positioning rods (542) are provided with a beveled surface at the end that is close to each other, and the two positioning rods (542) are provided with a magnetic block at the end that is close to each other. The magnetic block is used to attract the two positioning rods (542) to retract when they are close to each other.

6. A natural gas shut-off valve for preventing misoperation according to claim 3, characterized in that: The bottom of the positioning rod (542) is equipped with a limiting block (544), which slides in a blind groove opened inside the valve stem (2).

7. The misoperation prevention natural gas shut-off valve according to claim 1, characterized in that: The operating component (4) includes a rotating handwheel (41) installed at the end of the valve stem (2) and an operating ball (42) installed at the end of the control screw (545). The surface of the operating ball (42) is provided with a through hole for rotating the operating ball (42).

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