Anti-theft handle for stop valve and stop valve

Abstract

The utility model provides an anti-theft handle for a stop valve and the stop valve, and relates to the technical field of stop valves, the anti-theft handle comprises a valve body, the top of the valve body is provided with a valve seat, the top of the valve seat is provided with a valve rod, the top of the valve rod is provided with a connecting rod, and the top of the connecting rod is fixedly connected with a rotating handle. A connecting assembly is arranged between the valve rod and the rotating handle, the inner wall of a pipeline in the valve body is coated with a first coating in a surrounding mode, the pipeline in the valve body is provided with a valve element, and the outer surface of the valve element is coated with a second coating. By combining the embedding of the bottom positioning block and the positioning groove, the radial displacement generated during rotation of the rotating handle is inhibited, the reliable transmission of the valve rod and the rotating handle is ensured, and bolts or welding is not needed, so that the valve rod can be detached and stored when not in use, and is prevented from being stolen.

Description

Technical Field

[0001] This utility model relates to the field of gate valve technology, and in particular to an anti-theft handle for a gate valve and a gate valve. Background Technology

[0002] In industrial pipeline systems, gate valves are core components of fluid control, and their reliability directly impacts production safety and efficiency. However, traditional gate valves have long faced multiple technical bottlenecks in practical applications. First, the anti-theft performance of the valve operating handle is insufficient. Conventional designs use bolts or welding connections, allowing non-professionals to easily disassemble the handle using common tools. This leads to frequent theft or malicious operation of valves in outdoor settings (such as municipal fire hydrants and gas pipelines), even causing safety accidents. Therefore, we propose an anti-theft handle and gate valve for gate valves. Utility Model Content

[0003] The purpose of this utility model is to provide an anti-theft handle for a stop valve and a stop valve in order to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] An anti-theft handle for a shut-off valve and a shut-off valve, comprising a valve body, a valve seat at the top of the valve body, a valve stem at the top of the valve seat, a connecting rod at the top of the valve stem, a rotating handle fixedly connected to the top of the connecting rod, a connecting assembly between the valve stem and the rotating handle, a first coating coating surrounding the inner wall of the internal pipe of the valve body, a valve core being disposed in the internal pipe of the valve body, and a second coating coating being applied to the outer surface of the valve core.

[0006] As a preferred embodiment of this utility model, connecting pipes are fixedly connected to both sides of the valve body.

[0007] As a preferred embodiment of this utility model, the other end of each of the two connecting pipes is fixedly connected to a flange, and the outer wall of each flange is provided with multiple mounting holes.

[0008] As a preferred embodiment of this utility model, the first coating is made of polytetrafluoroethylene (PTFE), which has excellent corrosion resistance, low coefficient of friction, and self-lubricating properties.

[0009] As a preferred embodiment of this invention, the second coating is made of titanium nitride, which has high hardness and excellent wear resistance.

[0010] As a preferred embodiment of this utility model, the connecting assembly includes a plug rod, with a plug rod fixedly connected to one end of the bottom of the connecting rod, and a plug hole is provided on the top of the valve stem.

[0011] As a preferred embodiment of this utility model, the top of each insertion hole is provided with multiple limiting grooves, and the outer surface of the insertion rod is provided with multiple limiting blocks that correspond to the positions of the limiting grooves.

[0012] As a preferred embodiment of this utility model, a positioning groove is provided at the bottom of the plug rod, and a positioning block is provided at the bottom of the plug hole and located in the positioning groove.

[0013] This utility model embodiment also provides a shut-off valve, including the aforementioned anti-theft handle for the shut-off valve.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] In this utility model, a plug-in handle structure is adopted: the plug-in rod and the limiting groove at the top of the valve stem engage with each other through multiple circumferential mechanical engagement, combined with the engagement of the bottom positioning block and the positioning groove, to suppress the radial displacement generated when the rotating handle is rotated, ensuring reliable transmission between the valve stem and the rotating handle. No bolts or welding are required, so that it can be disassembled and stored when not in use to prevent theft. Attached Figure Description

[0016] Figure 1 A schematic diagram of the overall structure of a gate valve and an anti-theft handle for a gate valve provided by this utility model;

[0017] Figure 2 A schematic diagram of the overall structure of an anti-theft handle for a stop valve and the valve stem portion of a stop valve provided by this utility model;

[0018] Figure 3 A schematic diagram of the overall structure of an anti-theft handle for a shut-off valve and a rotating handle for a shut-off valve provided by this utility model;

[0019] Figure 4 A schematic diagram of the internal structure of the valve stem of a stop valve and an anti-theft handle for a stop valve provided by this utility model;

[0020] Figure 5 This utility model provides an anti-theft handle for a stop valve and a schematic diagram of the internal structure of the valve body.

[0021] Legend: 1. Valve body; 101. Connecting pipe; 2. Flange; 201. Mounting hole; 3. Valve seat; 301. Valve stem; 4. Connecting rod; 401. Rotating handle; 5. Connecting assembly; 501. Insert rod; 5011. Limiting block; 5012. Positioning groove; 502. Inserting hole; 5021. Limiting groove; 5022. Positioning block; 6. First coating; 7. Valve core; 701. Second coating. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0023] To facilitate understanding of this utility model, a more comprehensive description of this utility model will be provided below with reference to relevant embodiments, and several embodiments of this utility model will be given. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of this utility model more thorough and complete.

[0024] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0026] Example 1

[0027] like Figure 1-5As shown, this utility model provides a technical solution: an anti-theft handle for a stop valve and a stop valve, including a valve body 1, a valve seat 3 at the top of the valve body 1, a valve stem 301 at the top of the valve seat 3, a connecting rod 4 at the top of the valve stem 301, a rotating handle 401 fixedly connected to the top of the connecting rod 4, a connecting assembly 5 between the valve stem 301 and the rotating handle 401, the connecting assembly 5 including a plug rod 501, a plug rod 501 fixedly connected to one end of the bottom of the connecting rod 4, a plug hole 502 at the top of the valve stem 301, multiple limiting grooves 5021 circumferentially formed around the top of each plug hole 502, multiple limiting blocks 5011 circumferentially formed around the outer surface of the plug rod 501 and corresponding to the positions of the limiting grooves 5021, a positioning groove 5012 at the bottom of the plug rod 501, a positioning block 5022 located within the positioning groove 5012 at the bottom of the plug hole 502, and a plug... When the connecting rod 501 is inserted into the insertion hole 502, the position of the limiting block 5011 is aligned with the position of the limiting groove 5021 on the insertion hole 502. Then, the connecting rod 501 is inserted into the insertion hole 502 opened at the top of the valve stem 301. At the same time, the circumferential distribution of the limiting block 5011 and the limiting groove 5021 forms a multi-point mechanical engagement, suppressing the radial displacement generated when the rotating handle 401 is rotated, and ensuring the transmission reliability of the valve stem 301 and the rotating handle 401. After the connecting rod 501 enters the insertion hole 502, the positioning block 5022 at the bottom of the insertion hole 502 is embedded in the positioning groove 5012 at the bottom of the connecting rod 501, thereby strengthening the connection between them. The installation or removal can be completed by rotating the handle to align the limiting block 5011 and the limiting groove 5021 without the need for bolt fixing or welding. Therefore, when not in use, it can be removed and stored to prevent theft.

[0028] Example 2

[0029] like Figure 1-5As shown, this utility model provides a technical solution: an anti-theft handle for a stop valve and a stop valve, wherein the inner wall of the internal pipe of the valve body 1 is coated with a first coating 6, a valve core 7 is provided in the internal pipe of the valve body 1, and the outer surface of the valve core 7 is coated with a second coating 701. The first coating 6 is made of polytetrafluoroethylene (PTFE), which has excellent corrosion resistance, low coefficient of friction and self-lubricating properties. The second coating 701 is made of titanium nitride, which has high hardness and excellent wear resistance. The PTFE coating on the inner wall of the valve body 1 effectively resists the erosion of corrosive media such as acids, alkalis and salts through its chemical inertness and low surface energy, extending the service life of the valve body 1. Its low coefficient of friction and self-lubricating properties can reduce the flow resistance of the medium and reduce the valve opening and closing torque, which is especially suitable for high viscosity or easily crystallizing media. The titanium nitride (TiN) coating on the outer surface of the valve core 7, with its high hardness and wear resistance, resists friction and wear between the valve core 7 and the inner wall of the pipe inside the valve body 1, preventing scratches or failure of the sealing surface due to frequent opening and closing. The combination of the two coatings can reduce gap leakage between the valve core 7 and the valve body 1, and maintain sealing stability under high pressure or high flow rate scenarios. Both sides of the valve body 1 are fixedly connected to connecting pipes 101, and the other end of both connecting pipes 101 is fixedly connected to flanges 2. Multiple mounting holes 201 are opened around the outer wall of the flanges 2, which are connected to external pipes. The mounting holes 201 distributed around the flanges can achieve quick alignment and connection with the pipe flange, reducing installation complexity. The multi-hole design can evenly distribute the clamping force on the flange connection surface, reducing deformation or leakage of the sealing gasket due to stress concentration.

[0030] The working process of this utility model is as follows: When using an anti-theft handle for a stop valve and a stop valve, firstly, a connecting rod 4 is fixedly connected to the bottom of the handle 401, and a plug-in rod 501 is fixedly connected to the bottom of the connecting rod 4. A plug-in hole 502 is opened at the top of the valve stem 301, and multiple limiting grooves 5021 are opened around the top of each plug-in hole 502. Multiple limiting blocks 5011 are arranged around the outer surface of the plug-in rod 501 and correspond to the positions of the limiting grooves 5021. The plug-in rod 501 is inserted into the plug-in rod. When the valve stem 301 is inserted into the insertion hole 502, the limiting block 5011 is aligned with the limiting groove 5021 on the insertion hole 502. Then, the insertion rod 501 is inserted into the insertion hole 502 at the top of the valve stem 301. At the same time, the circumferential distribution of the limiting block 5011 and the limiting groove 5021 forms a multi-point mechanical engagement, suppressing the radial displacement generated when the rotating handle 401 is rotated, and ensuring the transmission reliability between the valve stem 301 and the rotating handle 401. The insertion rod 501 enters the insertion hole 502. The positioning block 5022 at the bottom of the insertion hole 502 is embedded in the positioning groove 5012 at the bottom of the insertion rod 501, thereby strengthening the connection between them. Installation or disassembly can be completed by rotating the handle to align the limiting block 5011 with the limiting groove 5021 without the need for bolt fixing or welding. This allows it to be disassembled and stored when not in use to prevent theft. The inner wall of the internal pipe of the valve body 1 is coated with a first coating 6. The valve core 7 is set in the internal pipe of the valve body 1. The outer surface of the valve core 7 is coated with a second coating 701. The first coating 6 is made of polytetrafluoroethylene (PTFE), and the second coating 701 is made of titanium nitride. PTFE has the characteristics of corrosion resistance, low friction and self-lubrication. When used on the inner wall of the valve body 1, it can reduce the resistance of medium flow and prevent corrosion. The titanium nitride coating on the surface of the valve core 7 provides high hardness and wear resistance, which is suitable for frequent opening and closing. The combination of the two can reduce friction, reduce wear, extend valve life and enhance sealing performance.

[0031] The present invention also provides a shut-off valve, including the anti-theft handle for the shut-off valve described in any one of the above.

[0032] 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. An anti-theft handle for a shut-off valve, comprising a valve body (1), characterized in that: The valve body (1) is provided with a valve seat (3) at the top, the valve seat (3) is provided with a valve stem (301) at the top, the valve stem (301) is provided with a connecting rod (4) at the top, the connecting rod (4) is fixedly connected with a rotating handle (401) at the top, a connecting component (5) is provided between the valve stem (301) and the rotating handle (401), the inner wall of the internal pipe of the valve body (1) is coated with a first coating (6), the internal pipe of the valve body (1) is provided with a valve core (7), and the outer surface of the valve core (7) is coated with a second coating (701). The connecting assembly (5) includes a plug rod (501), and the bottom end of the connecting rod (4) is fixedly connected to the plug rod (501). The valve stem (301) has a plug hole (502) at the top. The top of each insertion hole (502) is provided with multiple limiting grooves (5021), and the outer surface of the insertion rod (501) is provided with multiple limiting blocks (5011) which correspond to the positions of the limiting grooves (5021).

2. The anti-theft handle for a shut-off valve according to claim 1, characterized in that: Both sides of the valve body (1) are fixedly connected to connecting pipes (101).

3. The anti-theft handle for a shut-off valve according to claim 2, characterized in that: The other end of each of the two connecting pipes (101) is fixedly connected to a flange (2), and the outer side wall of the flange (2) is provided with multiple mounting holes (201) around it.

4. The anti-theft handle for a shut-off valve according to claim 1, characterized in that: The first coating (6) is made of polytetrafluoroethylene, which has excellent corrosion resistance, low coefficient of friction and self-lubricating properties.

5. The anti-theft handle for a shut-off valve according to claim 1, characterized in that: The second coating (701) is made of titanium nitride, which has high hardness and excellent wear resistance.

6. The anti-theft handle for a shut-off valve according to claim 1, characterized in that: The bottom of the plug rod (501) is provided with a positioning groove (5012), and the bottom of the plug hole (502) is provided with a positioning block (5022) and located in the positioning groove (5012).

7. A shut-off valve, characterized in that, The anti-theft handle for the shut-off valve as described in any one of claims 1-6.

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