Plug valve handle adjusting structure

Abstract

According to the technical scheme, the plug valve handle adjusting structure is characterized in that the plug valve handle adjusting structure comprises a valve deck and a valve rod penetrating through the valve deck to be installed, the plug valve handle adjusting structure further comprises a handle assembly, the handle assembly comprises a rotating arm and a fixed arm connected with the rotating arm, a limiting piece is arranged on the valve deck and fixedly connected with the valve deck, and the valve rod is provided with a fixed piece. The fixed part is fixedly connected with the valve rod, the fixed arm penetrates through the fixed part and drives the valve rod and the rotating arm to rotate synchronously, and the rotating arm abuts against the limiting part when rotating to the first position. During maintenance, a conventional or same handle assembly is replaced for temporarily adjusting the opening degree of the valve element.

Description

Technical Field

[0001] The utility model relates to the technical field of a valve and related devices, and more particularly to a plug valve handle adjustment structure. Background Art

[0002] Valves in the prior art are usually provided with a limiting component, and are also provided with a resistance component that directly or indirectly cooperates with the valve stem. The resistance component interferes with the limiting component to limit further rotation of the valve stem, thereby realizing the operation of quickly rotating the valve to a preset first position (which can be the normally open, normally closed or half-open position of the valve core). However, the resistance component and the limiting component will wear out due to long-term use or high-frequency interference, thereby reducing the accuracy. When replacement is required, the valve needs to be closed, and then the corresponding parts are removed before the resistance component is removed. After replacing the resistance component, it is reinstalled and the valve is opened again, which increases maintenance costs. In the special case of multiple pipelines cooperating with each other, all pipelines need to be closed before the valve on a specific pipeline can be repaired.

[0003] In view of the above reasons, how to repair the conflicting parts without closing the valve is exactly the problem considered in this application. Utility Model Content

[0004] In view of the shortcomings of the existing technology, a plug valve handle adjustment structure is provided, which can repair the conflicting parts without closing the valve.

[0005] To achieve the above-mentioned purpose, the following technical solution is provided: a plug valve handle adjustment structure, comprising a valve cover and a valve stem installed through the valve cover, comprising a handle assembly, the handle assembly comprising a rotating arm and a fixed arm connected to the rotating arm, a limiting member is provided on the valve cover, the limiting member is fixedly connected to the valve cover, a fixing member is provided on the valve stem, the fixing member is fixedly connected to the valve stem, the fixed arm passes through the fixing member and drives the valve stem and the rotating arm to rotate synchronously, and the rotating arm conflicts with the limiting member when it rotates to the first position.

[0006] In a further optimization of the present invention, the fixed arm is provided with a receiving groove, the rotating arm and the fixed arm are rotatably connected, and the rotating arm is received in the receiving groove.

[0007] In a further optimization of the present invention, the limiting member is provided with a fixing groove, part of the rotating arm is rotatably inserted into the fixing groove, and the fixing groove limits further rotation of the rotating arm.

[0008] According to a further optimization of the present invention, a first limiting shell and a second limiting shell are provided on the rotating arm, and the first limiting shell and the second limiting shell are connected and in conflict with the fixed arm to limit further rotation of the fixed arm.

[0009] According to a further optimization of the present invention, a first limiting shell and a second limiting shell are provided on the fixed arm, the first limiting shell and the second limiting shell are connected and contact the rotating arm to limit further rotation of the fixed arm.

[0010] According to a further optimization of the present invention, the first limiting shell and / or the second limiting shell is provided with a threaded hole, a bolt is screwed into or out of the threaded hole, and the bolt interferes with the connecting arm.

[0011] According to a further optimization of the present invention, the first limiting shell and / or the second limiting shell is provided with a threaded hole, a bolt is screwed into or out of the threaded hole, and the bolt interferes with the fixed arm.

[0012] This technical solution has the following beneficial effects:

[0013] 1. The rotating arm and the limiter conflict, thus limiting the further rotation of the valve stem;

[0014] 2. Replace the conventional or identical handle assembly during maintenance to temporarily adjust the valve core opening. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural schematic diagram of a plug valve handle adjustment structure.

[0016] Figure 2 It is a schematic diagram of the three-dimensional structure of a handle assembly.

[0017] Figure numerals: 1, valve cover; 2, valve stem; 3, handle assembly; 31, rotating arm; 32, fixed arm; 321, accommodating groove; 4, limiting member; 41, fixing groove; 5, fixing member; 6, first limiting shell; 7, second limiting shell; 8, threaded hole. DETAILED DESCRIPTION

[0018] The present invention will be further described below in conjunction with the accompanying drawings and embodiments. Identical components are denoted by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to directions in the accompanying drawings, and the terms "bottom," "top," "inner," and "outer" refer to directions toward or away from the geometric center of a particular component, respectively.

[0019] Reference Figure 1-2As shown, a plug valve handle adjustment structure includes a valve cover 1 and a valve stem 2 installed through the valve cover 1, and also includes a handle assembly 3. The handle assembly 3 includes a rotating arm 31 and a fixed arm 32 connected to the rotating arm 31. A limit member 4 is provided on the valve cover 1, and the limit member 4 is fixedly connected to the valve cover 1. The valve stem 2 is provided with a fixing member 5, and the fixing member 5 is fixedly connected to the valve stem 2. The fixed arm 32 passes through the fixing member 5 and drives the valve stem 2 and the rotating arm 31 to rotate synchronously. When the rotating arm 31 rotates to the first position, it conflicts with the limit member 4.

[0020] When the handle assembly 3 is operated, the fixed arm 32 passes through the fixing piece 5 on the valve stem 2 to drive the valve stem 2 and drive the rotating arm 31 to rotate synchronously (the fixed arm 32 and the rotating arm 31 can be connected by bolts, but are not limited to bolt connections). As long as the connection can realize the rotation of the fixed arm 32 and the rotating arm 31, it can be used as a connection method of the two components in this utility model). When the fixed arm 32 drives the rotating arm 31 to rotate to the first position (corresponding to the normally open or normally closed or half-open position, etc.), it conflicts with the limit member 4 on the valve cover 1. The force acting on the limit member 4 is dispersed to the valve cover 1, reducing wear and tear, thereby extending the service life of the limit member 4. After long-term use, if the rotating arm 31 conflicts and wears with the limit member 4, the fixed arm 32 can be removed, the connecting bolts can be removed and the rotating arm 31 can be replaced separately. At the same time, the limit member 4 can also be connected to the valve cover 1 with bolts to achieve independent replacement. During maintenance, the valve stem 2 can still be operated by a conventional handle, and there is no need to close the valve and disassemble the valve stem 2.

[0021] Preferably, the fixed arm 32 is provided with a receiving groove 321 , the rotating arm 31 and the fixed arm 32 are rotatably connected, and the rotating arm 31 is received in the receiving groove 321 .

[0022] The rotating arm 31 rotates to the receiving groove 321 of the fixed arm 32, and is folded and stored in the receiving groove 321 in the non-operating state to reduce the space occupied; when unfolded, the rotating arm 31 is screwed out of the receiving groove 321 to form an operating state, which is used for the rotating arm 31 to rotate and conflict with the limit member 4. The side wall of the receiving groove 321 constrains the rotating arm 31 to ensure stability during rotation and conflict. At the same time, the folding design reduces the risk of deformation caused by external force impact in the non-operating state. In special circumstances, the valve stem 2 is stuck and cannot rotate due to impurities or other internal factors. The rotating arm 31 can be stored in the receiving groove 321 so that the two are overlapped and pass through the fixing member 5 together. At this time, force is applied to the rotating arm 31 and the fixed arm 32 simultaneously, and the overlapping is used to disperse the torsional stress to avoid deformation of a single component under high torque.

[0023] Preferably, the limiting member 4 is provided with a fixing groove 41 , and part of the rotating arm 31 is rotatably inserted into the fixing groove 41 , and the fixing groove 41 limits the rotating arm 31 from further rotation.

[0024] The end of the rotating arm 31 is inserted into the fixed groove 41 of the limiting member 4, and the limitation is achieved by the interference between the groove wall of the fixed groove 41 and the side of the rotating arm 31. The fixed groove 41 can be designed as a U-shaped or rectangular groove that can accommodate part of the rotating arm 31 and limit the further rotation of the rotating arm 31, which can be used as a technical solution of the present invention.

[0025] Preferably, a first limiting shell 6 and a second limiting shell 7 are provided on the rotating arm 31 . The first limiting shell 6 and the second limiting shell 7 are connected and contact the fixed arm 32 to limit further rotation of the fixed arm 32 .

[0026] The first limiting shell 6 and the second limiting shell 7 form a clamping structure to clamp part of the rotating arm 31, and the connection method can be a keyway connection (the connection method can be various, as long as the first limiting shell 6 and the second limiting shell 7 can be connected). When the rotating arm 31 rotates to a preset angle, the fixed arm 32 conflicts with the first limiting shell 6 and / or the second limiting shell to form a limit. By adjusting the distance between the first limiting shell 6 and the second limiting shell, it can adapt to rotating arms 31 of different sizes, and the rotation angle of the rotating arm 31 can also be limited by setting it at different positions of the rotating arm 31.

[0027] Preferably, a first limiting shell 6 and a second limiting shell 7 are provided on the fixed arm 32 . The first limiting shell 6 and the second limiting shell 7 are connected and contact the rotating arm 31 to limit further rotation of the fixed arm 32 .

[0028] The first limiting shell 6 and the second limiting shell 7 are fixed to the fixed arm 32 to form a clamping structure for the fixed arm 32. When the rotating arm 31 is unfolded to the working angle, its side surfaces interfere with the first limiting shell 6 and the second limiting shell 7. The rigid support of the first limiting shell 6 and the second limiting shell 7 prevents the rotating arm 31 from rotating, thereby adapting to limiting members 4 of different heights.

[0029] Preferably, the first limiting shell 6 and / or the second limiting shell 7 is provided with a threaded hole 8, and a bolt is screwed into or out of the threaded hole 8, and the bolt contacts the connecting arm.

[0030] The bolt is screwed in so that its end is pressed against the surface of the connecting arm. The degree of screwing in or out of the bolt is adjusted by the thread, thereby changing the position of the first limiting shell 6 and the second limiting shell 7 on the connecting arm or strengthening the connection with the connecting arm.

[0031] Preferably, the first limiting shell 6 and / or the second limiting shell 7 is provided with a threaded hole 8 , and a bolt is screwed into or out of the threaded hole 8 , and the bolt contacts the fixed arm 32 .

[0032] After the bolt is screwed into the first limiting shell 6 and the second limiting shell 7, it presses against the surface of the fixed arm 32. The threaded fit can accurately control the resistance force of the bolt on the fixed arm 32. At the same time, a gasket can be added to the end of the bolt to cushion the impact and extend the service life of the bolt.

[0033] The above are only preferred embodiments of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, certain improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A plug valve handle adjustment structure, comprising a valve cover and a valve stem installed through the valve cover, characterized in that: It includes a handle assembly, which includes a rotating arm and a fixed arm connected to the rotating arm. A limiting piece is provided on the valve cover, and the limiting piece is fixedly connected to the valve cover. The valve stem is provided with a fixing piece, and the fixing piece is fixedly connected to the valve stem. The fixed arm passes through the fixing piece and drives the valve stem and the rotating arm to rotate synchronously. When the rotating arm rotates to the first position, it conflicts with the limiting piece.

2. The plug valve handle adjustment structure according to claim 1, characterized in that: The fixed arm is provided with an accommodating groove, the rotating arm and the fixed arm are rotatably connected, and the rotating arm is accommodated in the accommodating groove.

3. The plug valve handle adjustment structure according to claim 2, characterized in that: The limiting member is provided with a fixing groove, a portion of the rotating arm is rotatably inserted in the fixing groove, and the fixing groove limits the rotating arm from further rotation.

4. The plug valve handle adjustment structure according to claim 3, characterized in that: The rotating arm is provided with a first limiting shell and a second limiting shell. The first limiting shell and the second limiting shell are connected and contact the fixed arm to limit further rotation of the fixed arm.

5. The plug valve handle adjustment structure according to claim 3, characterized in that: The fixed arm is provided with a first limiting shell and a second limiting shell. The first limiting shell and the second limiting shell are connected and contact the rotating arm to limit further rotation of the fixed arm.

6. The plug valve handle adjustment structure according to any one of claims 4 or 5, characterized in that: The first limiting shell and / or the second limiting shell are provided with threaded holes, and bolts are screwed into or out of the threaded holes, and the bolts interfere with the connecting arms.

7. The plug valve handle adjustment structure according to any one of claims 4 or 5, characterized in that: The first limiting shell and / or the second limiting shell are provided with threaded holes, and bolts are screwed into or out of the threaded holes, and the bolts interfere with the fixed arms.

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