Valve cover mechanism for gate valve

Abstract

The utility model discloses a valve cover mechanism for a gate valve, which relates to the technical field of gate valves and comprises a bottom cover and a retainer, the bottom cover comprises a housing and a positioning plate fixed at the top of the housing, the retainer comprises a retainer body and a bottom plate fixed at the bottom of the retainer body, and a positioning groove capable of accommodating the positioning plate is arranged on the bottom surface of the bottom plate far away from the retainer body. Connecting grooves are formed in the two opposite side walls of the positioning plate, mounting grooves are formed in the inner walls, close to the connecting grooves, of the positioning grooves, connecting clamping plates are arranged in the mounting grooves, one sides of the connecting clamping plates are inserted into the connecting grooves, blind holes are formed in the inner walls, away from the connecting clamping plates, of the mounting grooves, springs are arranged in the blind holes, and one ends of the springs are connected with the inner walls of the blind holes. A connecting rod is fixed to the side wall, away from the positioning plate, of the connecting clamping plate, and the connecting rod penetrates out of the side wall of the bottom plate and is fixedly provided with a pull block. According to the utility model, the bottom cover of the valve cover and the retainer can be connected and fixed conveniently, the assembly process is simple and convenient, and higher assembly precision can be ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of gate valves, in particular to a valve cover mechanism for gate valves. Background Art

[0002] Gate valves are widely used valve products, and are used to control the transmission of media in the fields of petrochemicals, pharmaceuticals, metallurgy, etc. Gate valves mainly include valve body, valve cover, hand wheel and gate plate. The valve stem is connected to the gate plate in the valve body. The valve stem and gate plate are driven by turning the hand wheel to open and close the valve. The valve cover is one of the important parts of the valve. It is connected to the valve body and the valve stem passes through it. The valve stem can play the role of the valve stem.

[0003] The existing gate valve cover includes a bottom cover and a retainer. Since the valve stem of the gate valve is generally long, the valve stem needs to be maintained stable by the retainer. The bottom cover and the retainer are split structures and are fixed by bolts.

[0004] In view of the above-mentioned prior art, the inventor believes that the existing valve cover, bottom cover and retaining frame are connected by multiple bolts, and the assembly process is relatively cumbersome. In addition, in order to ensure the center degree of the valve stem, the processing accuracy of the connection holes for each bolt to pass through is required to be high. Utility Model Content

[0005] In order to solve the above problems, the utility model provides a valve cover mechanism for a gate valve, which is convenient for connecting and fixing a bottom cover and a retaining frame of the valve cover, has a simple assembly process, and can ensure high assembly accuracy.

[0006] The technical solution adopted by the utility model to solve its technical problems is: a valve cover mechanism for a gate valve, comprising a bottom cover and a retaining frame, the bottom cover comprising a cover shell and a positioning plate fixed to the top of the cover shell, the retaining frame comprising a frame body and a bottom plate fixed to the bottom of the frame body, the bottom surface of the bottom plate away from the frame body is provided with a positioning groove for accommodating the positioning plate, the two opposite side walls of the positioning plate are provided with connecting grooves, the inner wall of the positioning groove close to the connecting groove is provided with an installation groove, a connecting card is arranged in the installation groove, one side of the connecting card is inserted in the connecting groove, a blind hole is arranged on the inner wall of the installation groove away from the connecting card, a spring is arranged in the blind hole, one end of the spring is connected to the inner wall of the blind hole, and the other end is connected to the connecting card, the side wall of the connecting card away from the positioning plate is fixed with a connecting rod, the connecting rod passes through the side wall of the bottom plate and is fixed with a pull block.

[0007] Furthermore, the bottom surface of the pulling block is provided with corrugated grooves, and the two pulling blocks and the bottom plate can be combined into a complete connecting disc.

[0008] Furthermore, the depth of the positioning groove is the same as the thickness of the positioning plate.

[0009] Furthermore, a flange plate for connecting to the valve body is fixed to the bottom edge of the cover shell, the cross-sectional profile of the cover shell is arc-shaped, and rib plates are fixed to the opposite side walls of the cover shell. The two ends of the rib plates extend to the positioning plate and the flange plate respectively, and are fixedly connected to the positioning plate and the flange plate.

[0010] Furthermore, a hanging hole is provided at one end of the rib plate close to the positioning plate.

[0011] Furthermore, the frame body includes two parallel bracket plates, an auxiliary sleeve is provided between the two bracket plates, the valve stem can pass through the auxiliary sleeve, two connecting blocks are fixed to the outer peripheral surface of the auxiliary sleeve, the connecting blocks correspond to the bracket plates, and slots are provided on the inner side walls of the two bracket plates close to each other. The connecting blocks are slidably inserted in the slots, and an adjusting bolt is threadedly connected to the bracket plate, and one end of the adjusting bolt penetrates into the bracket plate and abuts against the connecting block.

[0012] Beneficial effects of the utility model:

[0013] The valve cover mechanism for the gate valve of the utility model realizes the quick connection and fixation between the retainer and the bottom cover by arranging the positioning groove and the connecting clamping plate and other structures in the bottom plate, and the assembly is convenient and the assembly accuracy is high; and the setting of the auxiliary sleeve improves the stability of the valve body and ensures its assembly centering degree. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0015] Figure 2 It is a schematic diagram of the overall structure of the bottom surface of the base plate of the utility model.

[0016] Figure 3 It is an exploded view of the bottom shell and the retaining frame of the utility model.

[0017] Figure 4 It is a partial cross-sectional view of the retaining frame in the utility model.

[0018] In the figure: 1, bottom cover; 11, cover shell; 111, rib plate; 112, hanging hole; 12, positioning plate; 121, connecting groove; 13, flange plate; 2, retaining frame; 21, frame body; 211, bracket plate; 212, auxiliary sleeve; 213, connecting block; 22, bottom plate; 221, positioning groove; 222, connecting rod; 223, pull block; 224, connecting card plate; 225, spring. DETAILED DESCRIPTION

[0019] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0020] The utility model discloses a valve cover mechanism for a gate valve.

[0021] Reference Figures 1 to 4 A valve cover mechanism for a gate valve includes a bottom cover 1 and a retainer 2. The bottom cover 1 includes a housing 11, a positioning plate 12 integrally formed on the top of the housing 11, and a flange plate 13 welded to the bottom edge of the housing 11; the retainer 2 includes a frame 21 and a bottom plate 22 welded to the bottom of the frame 21. A positioning groove 221 for accommodating the positioning plate 12 is provided on the bottom surface of the bottom plate 22 away from the frame 21. The groove depth of the positioning groove 221 is the same as the thickness of the positioning plate 12. Therefore, when the positioning plate 12 is located in the positioning groove 221, the bottom surface of the positioning plate 12 is flush with the bottom surface of the bottom plate 22.

[0022] Reference Figure 3 and Figure 4 , connecting grooves 121 are provided on opposite side walls of the positioning plate 12, and an installation groove is provided on the inner wall of the positioning groove 221 close to the connecting groove 121, and a connecting card plate 224 is provided in the installation groove, and one side of the connecting card plate 224 is inserted in the connecting groove 121, and a blind hole is provided on the inner wall of the installation groove away from the connecting card plate 224, and a spring 225 is provided in the blind hole, one end of the spring 225 is connected to the inner wall of the blind hole, and the other end is connected to the connecting card plate 224, and a connecting rod 222 is fixed to the side wall of the connecting card plate 224 away from the positioning plate 12, and the connecting rod 222 passes through the side wall of the bottom plate 22 and is fixed with a pull block 223. In this embodiment, there are two blind holes, which are symmetrically distributed on both sides of the connecting rod 222, and when the spring 225 is in a natural state, it pushes one side of the connecting card plate 224 to extend into the connecting groove 121, so that the bottom plate 22 and the positioning plate 12 are relatively fixed, and then the connection and fixation of the bottom cover 1 and the retaining frame 2 are realized.

[0023] The bottom surface of the pull block 223 is provided with corrugated grooves to provide a force application point, so that the staff can pull the pull block 223 by hand; the two pull blocks 223 and the bottom plate 22 can be combined into a complete connecting disc, and the overall structure is more reasonable and beautiful.

[0024] Reference Figure 2 and Figure 3 The bottom edge of the housing 11 is fixed with a flange plate 13 for connecting with the valve body. The cross-sectional profile of the housing 11 is in an arc shape. Ribs 111 are fixed to the opposite side walls of the housing 11. The two ends of the ribs 111 extend to the positioning plate 12 and the flange plate 13 respectively, and are fixedly connected to the positioning plate 12 and the flange plate 13. The provision of the ribs 111 can effectively improve the structural strength of the housing 11, so that the housing 11 is not prone to collapse when subjected to external forces. A hanging hole 112 is provided at one end of the ribs 111 close to the positioning plate 12, which is convenient for lifting and moving the valve cover as a whole, thereby improving the assembly convenience of the gate valve as a whole.

[0025] Reference Figure 2 The frame 21 includes two bracket plates 211 arranged in parallel, an auxiliary sleeve 212 is arranged between the two bracket plates 211, and the valve stem can pass through the auxiliary sleeve 212. Two connecting blocks 213 are welded and fixed on the outer peripheral surface of the auxiliary sleeve 212. The connecting blocks 213 correspond to the bracket plates 211. Slots are provided on the inner side walls of the two bracket plates 211 close to each other. The connecting blocks 213 are slidably inserted into the slots. The bracket plates 211 are threadedly connected with adjusting bolts 214. One end of the adjusting bolt 214 penetrates the bracket plates 211 and abuts against the connecting blocks 213. The auxiliary sleeve 212 plays a role in positioning and auxiliary support for the valve stem, and the position of the auxiliary sleeve 212 can be fine-tuned by rotating the adjusting bolt 214 to ensure the centering of the valve body.

[0026] The working principle of a valve cover mechanism for a gate valve of the utility model is as follows: when installing the bottom cover 1 and the retaining frame 2, the staff manually pulls the two pull blocks 223, and the pull blocks 223 drive the connecting clamping plate 224 to retract into the installation groove through the connecting rod 222, and then aligns the positioning groove 221 with the positioning block, and clamps the positioning plate 12 into the corresponding positioning groove 221, and then releases the pull block 223, and the connecting rod 222 extends one side into the connecting groove 121 under the elastic force of the spring 225, so that the bottom plate 22 and the positioning plate 12 are relatively fixed, and then the connection and fixation of the bottom cover 1 and the retaining frame 2 are realized, the operation is simple and convenient, and the bottom cover 1 and the retaining frame 2 are positioned and installed based on the connection relationship between the positioning plate 12 and the positioning groove 221, the installation accuracy is high, and there is no need to open a plurality of connection holes for passing bolts, and the requirement for processing accuracy is relatively low.

[0027] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A valve cover mechanism for a gate valve, comprising a bottom cover (1) and a retainer (2), characterized in that: The bottom cover (1) comprises a housing (11) and a positioning plate (12) fixed to the top of the housing (11); the retaining frame (2) comprises a frame body (21) and a bottom plate (22) fixed to the bottom of the frame body (21); a positioning groove (221) capable of accommodating the positioning plate (12) is provided on a bottom surface of the bottom plate (22) away from the frame body (21); connecting grooves (121) are provided on opposite side walls of the positioning plate (12); an installation groove is provided on an inner wall of the positioning groove (221) close to the connecting groove (121); a mounting groove is provided in the installation groove A connecting card plate (224) is provided, one side of which is inserted into the connecting groove (121), a blind hole is provided on the inner wall of the mounting groove away from the connecting card plate (224), a spring (225) is provided in the blind hole, one end of the spring (225) is connected to the inner wall of the blind hole, and the other end is connected to the connecting card plate (224), a connecting rod (222) is fixed to the side wall of the connecting card plate (224) away from the positioning plate (12), the connecting rod (222) passes through the side wall of the bottom plate (22) and is fixed with a pull block (223).

2. A gate valve cover mechanism according to claim 1, characterized in that: The bottom surface of the pulling block (223) is provided with a corrugated groove, and the two pulling blocks (223) and the bottom plate (22) can be combined into a complete connection disc.

3. A gate valve cover mechanism according to claim 1, characterized in that: The groove depth of the positioning groove (221) is the same as the plate thickness of the positioning plate (12).

4. A gate valve cover mechanism according to any one of claims 1 to 3, characterized in that: A flange plate (13) for connecting to the valve body is fixed on the bottom edge of the cover shell (11); the cross-sectional profile of the cover shell (11) is in the shape of an arc; rib plates (111) are fixedly attached to opposite side walls of the cover shell (11); the two ends of the rib plates (111) respectively extend to the positioning plate (12) and the flange plate (13), and are fixedly connected to the positioning plate (12) and the flange plate (13).

5. A gate valve cover mechanism according to claim 4, characterized in that: A hanging hole (112) is formed at one end of the rib plate (111) close to the positioning plate (12).

6. A gate valve cover mechanism according to claim 4, characterized in that: The frame body (21) comprises two support plates (211) arranged in parallel, an auxiliary sleeve (212) is arranged between the two support plates (211), and the valve stem can pass through the auxiliary sleeve (212); two connecting blocks (213) are fixed to the outer peripheral surface of the auxiliary sleeve (212), and the connecting blocks (213) correspond to the support plates (211); inner side walls of the two support plates (211) close to each other are provided with slots, and the connecting blocks (213) are slidably inserted into the slots; an adjusting bolt (214) is threadedly connected to the support plate (211), and one end of the adjusting bolt (214) penetrates into the support plate (211) and abuts against the connecting block (213).

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