A valve fixing device

Abstract

The present invention belongs to the field of nuclear power maintenance tooling and fixtures, and in particular, relates to a valve fixing device. A valve fixing device is used in conjunction with a valve housing arranged in a pipeline. The valve housing includes a coupling block connected to the pipeline and a bracket connected to the coupling block. The bracket includes a top block and two connecting arms arranged opposite to the coupling block. The two ends of the top block are respectively connected to one end of the two connecting arms, and the other ends of the two connecting arms are respectively connected to the two ends of the coupling block. An operating area is formed between the top block and the coupling block. The valve fixing device includes: a clamping arm assembly, including a first clamping arm and a second clamping arm, and the first clamping arm and the second clamping arm are arranged opposite to each other; a locking assembly, used to make the first clamping arm and the second clamping arm jointly clamp the valve stem in the operating area; a fixing assembly, used to limit the relative rotation of the clamping arm assembly relative to the top block or the coupling block. After the electric head is separated from the electric valve, the present invention can lock the valve stem to prevent the valve stem from rotating accidentally.

Description

Technical Field

[0001] The invention belongs to the field of nuclear power maintenance tooling and fixtures, and in particular relates to a valve fixing device. Background Art

[0002] At present, in the nuclear power industry, system operation risks are crucial, and any possible risks must be reliably controlled. The safety assurance of electric valves is also crucial.

[0003] The electric valve includes a valve housing connected to a pipeline, a valve stem with one end disposed in the valve housing and controlling the connection / closure of the pipeline during rotation, and an electric head connected to the other end of the valve stem. The electric head is used to lock the valve stem to prevent the valve stem from rotating accidentally.

[0004] However, the electric head needs to be regularly inspected to ensure its reliability. When the electric head is separated from the valve stem, the valve stem loses the protection of the electric head self-locking. At the same time, because the valve stem is affected by the fluid pressure in the pipeline, there is a risk of accidentally opening the pipeline. Summary of the invention

[0005] The object of the present invention is to provide a valve fixing device, which aims to solve the problem of how to lock the valve stem to prevent the valve stem from rotating after the electric head of the electric valve is disassembled.

[0006] The present invention provides a valve fixing device, which is used in conjunction with a valve housing arranged in a pipeline to lock a valve stem, wherein the valve housing comprises a coupling block connected to the pipeline and a bracket connected to the coupling block, the bracket comprises a top block and two connecting arms arranged opposite to the coupling block, two ends of the top block are respectively connected to one end of the two connecting arms, and the other ends of the two connecting arms are respectively connected to two ends of the coupling block, an operating area is formed between the top block and the coupling block, one end of the valve stem passes through the operating area and extends into the pipeline, and the valve fixing device comprises:

[0007] The clamp arm assembly comprises a first clamp arm and a second clamp arm, wherein the first clamp arm and the second clamp arm are arranged opposite to each other;

[0008] A locking assembly, used to enable the first clamp arm and the second clamp arm to clamp the valve stem together in the working area;

[0009] The fixing assembly is used to limit the relative rotation of the clamping arm assembly relative to the top block or the coupling block.

[0010] The technical effect of the present invention is that the first clamp arm and the second clamp arm jointly clamp the valve stem under the action of the locking assembly, and then through the fixing assembly, the clamp arm assembly is prevented from rotating relative to the coupling block or the top block, thereby locking the valve stem to prevent the valve stem from rotating, thereby improving the reliability of the electric valve, avoiding the pressure in the pipeline from opening the electric valve, and ensuring the safety of the pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is an assembly diagram of a valve fixing device and an electric valve provided in an embodiment of the present invention;

[0012] Figure 2 yes Figure 1 A three-dimensional structural diagram of a valve fixing device;

[0013] Figure 3 yes Figure 2 Exploded view of the valve fixture.

[0014] The corresponding relationship between the numbers and names in the accompanying drawings is as follows:

[0015] 100, valve fixing device; 200, bracket; 300, valve body; 301, valve stem; 302, coupling block; 10, fixing assembly; 11, first clamping arm; 12, first adjusting member; 20, clamping arm assembly; 21, second clamping arm; 22, second adjusting member; 30, locking assembly; 31, bolt; 32, nut; 101, first threaded hole; 102, first notch; 103, first through hole; 201, second threaded hole; 202, second notch; 203, second through hole; 400, working area; 205, bracket; DETAILED DESCRIPTION

[0016] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0017] In the description of the present invention, it is necessary to understand that the orientation or positional relationship indicated by the terms "thickness", "up", "down", "vertical", "parallel", "bottom", "angle", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0018] In the present invention, unless otherwise clearly specified and limited, terms such as "installation" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements.

[0019] See also Figures 1 to 3 , an embodiment of the present invention provides a valve fixing device 100, which is used to cooperate with the maintenance of an electric valve. The electric valve includes a valve housing 300 connected to a pipeline, a valve stem 301 connected to the valve housing 300, and an electric head for locking the valve stem 301. When the electric head is disassembled for maintenance, the valve fixing device 100 is used in conjunction with the valve housing 300 to lock the valve stem 301 to prevent the valve stem 301 from accidentally rotating, so that the electric valve is opened by the pressure in the pipeline. Among them, the valve housing 300 includes a coupling block 302 connected to the pipeline and a bracket 205 connected to the coupling block 302, the bracket 205 includes two connecting arms (not shown in the figure) and a top block 300, the two ends of the top block 300 are respectively connected to one end of the two connecting arms, and the other ends of the two connecting arms are respectively connected to the two ends of the coupling block 302, and an operating area 400 is formed between the top block 300 and the coupling block 302, and one end of the valve stem passes through the operating area 400 and extends into the pipeline. Optionally, both the coupling block 302 and the top block 200 are provided with through holes, so that the valve stem 301 can pass through the coupling block 302 and the top block 200 through the two through holes.

[0020] The valve fixing device 100 includes: a clamp arm assembly 20, a locking assembly 30 and a fixing assembly 10. The clamp arm assembly 20 includes a first clamp arm 21 and a second clamp arm 22 arranged in parallel with and used in conjunction with the first clamp arm 21, and the first clamp arm 21 and the second clamp arm 22 are both located in the working area 400. It can be understood that the valve stem 301 is located between the first clamp arm 21 and the second clamp arm 22, and the locking assembly 30 is used to make the first clamp arm 21 and the second clamp arm 22 clamp the valve stem 301 together in the working area 400. The fixing assembly 10 is used to limit the relative rotation of the clamp arm assembly 20 relative to the top block 200 or the coupling block 302, so that the valve stem 301 is fixed and will not rotate relative to the coupling block 302 or the top block 200, thereby improving the reliability of the electric valve.

[0021] Under the action of the locking assembly 30, the first clamp arm 21 and the second clamp arm 22 jointly clamp the valve stem 301, and then through the fixing assembly 10, prevent the clamp arm assembly 20 from rotating relative to the coupling block 302 or the top block 200, thereby locking the valve stem 301 to prevent the valve stem 301 from rotating, thereby improving the reliability of the electric valve, avoiding the pressure in the pipeline from opening the electric valve, and ensuring the safety of the pipeline.

[0022] The fixing assembly 10 can adjust the position of the clamp arm assembly 20, and can be adjusted to make the clamp arm assembly 20 abut against the top block or the coupling block 302, wherein the abutment between the clamp arm assembly 20 and the top block or the coupling block 302 restricts the relative rotation of the clamp arm assembly 20 relative to the top block or the coupling block 302. Thus, the valve fixing device 100 is adapted to different operating ranges 400, and the use range of the valve fixing device 100 is improved.

[0023] The fixing assembly 10 includes at least one first adjusting member 12, which can move relative to the first clamp arm 11 in the direction of the coupling block 302 pointing to the top block, wherein the first adjusting member 12 makes the first clamp arm 11 abut the coupling block 302 when it moves to abut against the top block, and limits the relative rotation of the first clamp arm 11 relative to the top block or the coupling block 302, and makes the first clamp arm 11 abut the top block when it moves to abut against the coupling block 302, and limits the relative rotation of the first clamp arm 11 relative to the top block or the coupling block 302.

[0024] Specifically, one end of the first adjusting member 11 is connected to the first clamping arm 21, and the other end of the first adjusting member 11 abuts against the top block 200 and is pressed against the top block 200, thereby limiting the rotation of the first clamping arm 21 relative to the coupling block 302 or the top block 200. The length of the first adjusting member 11 between the first clamping arm 21 and the top block 200 is adjustable. By adjusting the length of the first adjusting member 11 between the coupling block 302 and the top block 200, the valve fixing device 100 can be adapted to operating ranges of different vertical heights, thereby increasing the use range of the valve fixing device 100.

[0025] The first adjusting member 12 is a screw structure, and the first clamping arm 11 is provided with a first threaded hole 101 along the direction from the coupling block 302 to the top block. The first adjusting member 12 is screwed to the first threaded hole 101, and moves relatively along the direction from the coupling block 302 to the top block by rotating relative to the first clamping arm 11, so as to adjust the length of the first adjusting member 11 between the first clamping arm 21 and the top block 200. Through the threaded structure, the length of the first adjusting member 11 between the top block 200 and the first clamping arm 21 can be accurately adjusted so that the first adjusting member 11 presses the top block 200, and the structure is simple, the operation is convenient, and the cost is low.

[0026] In one embodiment, two first adjusting members 11 are arranged at intervals, and the valve stem 301 is located between the two first adjusting members 11. It is understandable that multiple first adjusting members 11 can ensure the reliability of locking the valve stem 301. Furthermore, the cooperation between the first adjusting member 11 and the top block 200 is simple in structure and easy to use, thereby improving the use range of the valve fixing device 100.

[0027] The fixing assembly 10 includes at least one second adjusting member 22, which can move relative to the second clamp arm 21 in the direction of the coupling block 302 pointing to the top block, wherein the second adjusting member 22 makes the second clamp arm 21 abut the coupling block 302 when it moves to abut the top block, and limits the relative rotation of the second clamp arm 21 relative to the top block or the coupling block 302, and makes the second clamp arm 21 abut the top block when it moves to abut the coupling block 302, and limits the relative rotation of the second clamp arm 21 relative to the top block or the coupling block 302.

[0028] Specifically, one end of the second adjusting member 12 is connected to the second clamping arm 22, and the other end of the second adjusting member 12 abuts against and presses the top block 200, thereby preventing the second clamping arm 22 from rotating relative to the coupling block 302 or the top block 200, and preventing the valve stem 301 from rotating together. The length of the second adjusting member 12 between the second clamping arm 22 and the top block 200 is adjustable. By adjusting the length of the second adjusting member 12 between the coupling block 302 and the top block 200, the valve fixing device 100 can be adapted to operating ranges of different vertical heights, thereby increasing the use range of the valve fixing device 100.

[0029] Optionally, the dimensions of the first clamp arm 21 and the second clamp arm 22 are both 150 mm*23 mm*20 mm. It is understandable that the first clamp arm 21 and the second clamp arm 22 are equivalent in function and structure, which not only facilitates subsequent maintenance and replacement, but also allows for mass production of the first clamp arm 21 and the second clamp arm 22, thereby reducing costs.

[0030] Optionally, the second adjusting member 22 is a screw structure, the second clamp arm 21 is provided with a second threaded hole 201 along the direction of the coupling block 302 pointing to the top block, the second adjusting member 22 is screwed to the second threaded hole 201, and moves relatively along the direction of the coupling block 302 pointing to the top block by rotating relative to the second clamp arm 21, so as to adjust the length of the second adjusting member 12 between the second clamp arm 22 and the top block 200. Through the threaded structure, the length of the second adjusting member 12 between the top block 200 and the second clamp arm 22 can be accurately adjusted so that the second adjusting member 12 presses the top block 200, and the structure is simple and the cost is low.

[0031] Optionally, the first threaded hole 101 and the second threaded hole 201 are both 8 mm threaded holes.

[0032] In one embodiment, two second adjusting members 12 are arranged at intervals, and the valve stem 301 is located between the two second adjusting members 12. It is understandable that multiple second adjusting members 12 can ensure the reliability of locking the valve stem 301. Further, the cooperation between the second adjusting member 12 and the top block 200 is simple in structure and easy to use, thereby facilitating the wide use of the valve fixing device 100.

[0033] In one embodiment, a first notch 102 adapted to the side surface of the valve stem 301 is provided at the position where the first clamp arm 21 abuts against the valve stem 301, and the inner wall of the first notch 102 abuts against the side surface of the valve stem 301. A second notch 202 adapted to the side surface of the valve stem 301 is provided at the position where the second clamp arm 22 abuts against the valve stem 301, and the inner wall of the second notch 202 abuts against the side surface of the valve stem. The first notch 102 and the second notch 202 are adapted and cooperate with each other to clamp the valve stem 301 in the first notch 102 and the second notch 202, so as to not only further clamp the valve stem 301 to prevent the valve stem 301 from rotating, but also further prevent the first clamp arm 21 and the second clamp arm 22 from moving along the radial direction of the valve stem 301, thereby improving the safety of the valve fixing device 100.

[0034] Optionally, the first notch 102 and the second notch 202 are both semicircular in shape, so that the first notch 102 and the second notch 202 together form a circular hole, and the valve stem 301 is located in the circular hole. It can be understood that the outer diameter of the valve stem 301 is larger than the aperture of the circular hole, so that a gap is left between the first clamp arm 21 and the second clamp arm 22, so that the inner walls of the first notch 012 and the second notch 202 both abut against the peripheral side of the valve stem.

[0035] In one embodiment, the locking assembly 30 includes a bolt 31 and a nut 32 screwed on one end of the bolt 31. First through holes 103 are respectively opened at both ends of the first clamp arm 21, and second through holes 203 are opened at both ends of the second clamp arm 22 at positions corresponding to the first through holes 103. Bolts 31 and nuts 32 are provided at each first through hole. Two bolts 31 are screwed on two nuts 32 through corresponding first through holes 103 and corresponding second through holes 203, respectively, to lock the first clamp arm 21 and the second clamp arm 22. Through the cooperation of the bolts 31 and the nuts 32, the convenience of assembling and disassembling the first clamp arm 21 and the second clamp arm 22 can be improved.

[0036] Optionally, the diameters of the first through hole 103 and the second through hole 203 are both 8 mm.

[0037] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A valve fixing device, used in conjunction with a valve housing arranged in a pipeline to lock a valve stem, wherein: The valve housing comprises a coupling block connected to the pipeline and a bracket connected to the coupling block, the bracket comprises a top block and two connecting arms arranged opposite to the coupling block, two ends of the top block are respectively connected to one end of the two connecting arms, the other ends of the two connecting arms are respectively connected to two ends of the coupling block, an operating area is formed between the top block and the coupling block, one end of the valve stem passes through the operating area and extends into the pipeline, characterized in that the valve fixing device comprises: The clamp arm assembly comprises a first clamp arm and a second clamp arm, wherein the first clamp arm and the second clamp arm are arranged opposite to each other; A locking assembly, used to enable the first clamp arm and the second clamp arm to clamp the valve stem together in the working area; A fixing assembly, used for limiting the relative rotation of the clamping arm assembly relative to the top block or the coupling block; The fixing assembly can adjust the position of the clamp arm assembly and can be adjusted to make the clamp arm assembly abut against the top block or the coupling block, wherein the abutment between the clamp arm assembly and the top block or the coupling block restricts the relative rotation of the clamp arm assembly relative to the top block or the coupling block; The fixing assembly includes at least one first adjusting member, the first adjusting member can move relative to the first clamp arm along the direction from the coupling block to the top block, wherein the first adjusting member makes the first clamp arm abut against the coupling block and restricts the first clamp arm from rotating relative to the top block or the coupling block when the first adjusting member moves to abut against the coupling block, and makes the first clamp arm abut against the top block and restricts the first clamp arm from rotating relative to the top block or the coupling block when the first adjusting member moves to abut against the coupling block; The first adjusting member is a screw structure, the first clamp arm is provided with a first threaded hole along the direction from the coupling block to the top block, the first adjusting member is screwed to the first threaded hole, and moves relatively along the direction from the coupling block to the top block by rotating relative to the first clamp arm; The fixing assembly includes at least one second adjusting member, the second adjusting member can move relative to the second clamp arm along the direction from the coupling block to the top block, wherein the second adjusting member makes the second clamp arm abut against the coupling block and restricts the second clamp arm from rotating relative to the top block or the coupling block when the second adjusting member moves to abut against the coupling block, and makes the second clamp arm abut against the top block and restricts the second clamp arm from rotating relative to the top block or the coupling block when the second adjusting member moves to abut against the coupling block; The second adjusting member is a screw structure, and the second clamping arm is provided with a second threaded hole along the direction from the coupling block to the top block. The second adjusting member is screwed to the second threaded hole and moves relatively along the direction from the coupling block to the top block by rotating relative to the second clamping arm.

2. The valve fixing device according to claim 1, characterized in that: A first notch matched with the peripheral side surface of the valve stem is provided at the position where the first clamp arm abuts against the valve stem, and an inner wall of the first notch abuts against the peripheral side surface of the valve stem.

3. The valve fixing device according to claim 2, characterized in that: A second notch adapted to the peripheral side surface of the valve stem and matched with the first notch is formed at the position where the second clamp arm abuts against the valve stem, and an inner wall of the second notch abuts against the peripheral side surface of the valve stem.

4. The valve fixing device according to claim 3, characterized in that: The cross-sectional shape of the first notch and / or the second notch is semicircular.

5. The valve fixing device according to claim 1, characterized in that: The locking assemblies each include a bolt and a nut screwed onto one end of the bolt, first through holes are respectively provided at both ends of the first clamp arm, second through holes are respectively provided at both ends of the second clamp arm at positions corresponding to the first through holes, a bolt is provided at each of the first through holes, and each of the bolts is screwed onto the corresponding nut through the corresponding first through hole and the corresponding second through hole to lock the first clamp arm and the second clamp arm.

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