Auxiliary devices for valve installation

Abstract

The utility model discloses an auxiliary device for valve installation, including a fixing frame and a support rod assembly; a plurality of connecting rods are arranged between the fixing frame and the support rod assembly, one end of the connecting rod is detachably connected to the support rod assembly, an adjustment hole is arranged on the fixing frame to match the clearance of the connecting rod, and the other end of the connecting rod passes through the corresponding adjustment hole and is threadedly connected with a limit nut abutting against a side of the fixing frame away from the support rod assembly; a plurality of flange limit blocks are fixed on the fixing frame, and a plurality of valve seat support ring limit blocks are fixed on the support rod assembly. The support rod assembly in the utility model can adjust the radial dimension of the limit through the cooperation between the support rod and the adjusting nut and the multi-section limit steps on the flange limit block, so that the utility model can be applied to the installation of valves of different sizes and specifications, effectively expanding the scope of application of the utility model and saving a lot of labor costs and manufacturing costs.

Description

Technical Field

[0001] The utility model relates to the technical field of valve assembly tools, in particular to an auxiliary device for valve installation. Background Art

[0002] When installing the closing parts of a flat gate valve or a top mounted ball valve, the valve seat support rings on both sides of the valve cavity need to be opened to compress the springs on the valve seat support rings so that the gate or ball can be smoothly placed into the valve cavity. Figure 1 As shown, it is composed of a bottom plate 510, a top block 520, a guide block 530, an adjusting screw 540, a support plate 550, a tie rod 560 and a bolt 570; during preparation, the top block 520, the guide block 530 and the adjusting screw 540 are assembled and welded to form, and then welded to the bottom plate 510 to form a positioning structure. When the above-mentioned existing auxiliary device is used to install the valve, the positioning structure is placed in the groove of the valve seat support ring, and the adjusting screw 540 is rotated in sequence to push the top block 520 into the clamping ring groove of the valve seat support ring, and then the tie rod 560 is screwed into the guide block 530, and the support plate 550 is fixed and connected to the tie rod 560 by using the bolt 570 to cooperate with the peripheral through hole of the flange of the valve, and finally the valve seat support ring is pulled by adjusting the length of the tie rod 560.

[0003] The above-mentioned auxiliary device has the following disadvantages: 1. The base plate 510 is a special-shaped structure made of thin steel plate material, which needs to be processed by wire cutting and is difficult to process; 2. The top block 520, the guide block 530 and the adjusting screw 540 need to be welded and assembled and then welded to the base plate 510, and the processing process is relatively cumbersome; 3. The various components are basically connected by welding, so the size is fixed, and it can only be compatible with the valve seat support ring of the same inner diameter size, and the applicability is relatively narrow.

[0004] The Chinese invention patent application with publication number CN110715074A discloses an online repair cryogenic ball valve and its tooling; the tooling includes a support seat, a pull rod and a pull plate, the support seat is fixed on the flange of the valve body for fixing the valve cover, the pull rod passes through the support seat along the axial direction of the valve body, one end of the pull rod is connected to the pull plate, the pull plate extends into the valve body and is embedded in the groove of the valve seat support ring. The tooling can be used to open the two axial sealing components and then install the valve core into the valve cavity of the valve. Although the tooling disclosed in this patent has a simple structure, it can only be matched with a valve seat support ring of a single size. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide an auxiliary device for valve installation which is convenient to operate and has a wide application range.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is: an auxiliary device for valve installation, including a fixing frame and a support rod assembly; a plurality of connecting rods are arranged between the fixing frame and the support rod assembly, one end of the connecting rod is detachably connected to the support rod assembly, and an adjustment hole that matches the clearance of the connecting rod is provided on the fixing frame, and the other end of the connecting rod passes through the corresponding adjustment hole and is threadedly connected with a limit nut abutting on a side of the fixing frame away from the support rod assembly; a plurality of flange limit blocks are fixed on the fixing frame, and a plurality of valve seat support ring limit blocks are fixed on the support rod assembly.

[0007] As an improvement on the above scheme: the support rod assembly is composed of two support rods connected vertically and staggered; the middle part of the support rod is a snap-on part, which is provided with a clearance notch, and both ends of the support rod are threaded sections. The two support rods form a snap-on connection through the clearance notch of the snap-on part, and the threaded section of the support rod is threadedly connected with an adjusting nut, and the adjusting nut is detachably connected to the valve seat support ring limit block.

[0008] As an improvement of the above scheme: a limiting protrusion is fixed at the end of the adjusting nut away from the support rod, and the surface of the limiting protrusion is a hemispherical surface; a limiting groove is provided at the end of the valve seat support ring limiting block close to the adjusting nut, and the limiting groove is a semicircular groove adapted to the limiting protrusion.

[0009] As an improvement of the above solution: the number of the flange limit block, the valve seat support ring limit block and the connecting rod are the same and the setting positions are corresponding, and the two ends of the connecting rod are respectively matched with the flange limit block and the valve seat support ring limit block.

[0010] As an improvement of the above solution: the adjustment hole is a long strip through hole arranged on the flange limit block, and the connecting rod is detachably connected to the valve seat support ring limit block.

[0011] As an improvement of the above scheme: the connecting rod is threadedly connected to the valve seat support ring limit block, the extension length of the external thread at one end of the connecting rod that cooperates with the limit nut is greater than the extension length of the external thread at one end of the connecting rod that cooperates with the valve seat support ring limit block, and the rotation direction of the external threads at both ends of the connecting rod is the same.

[0012] As an improvement of the above solution: a circular through hole adapted to the flow channel of the valve is provided in the middle of the fixing frame, and the flange limit block and the fixing frame are an integrated structure.

[0013] As an improvement of the above scheme: the flange limit block is provided with a stop formed by multiple limit steps, and the valve seat support ring limit block is provided with at least one limit step; the step surfaces of the limit steps on the flange limit block and the valve seat support ring limit block are both arc surfaces.

[0014] The beneficial effects of the utility model are as follows: the utility model forms a limiting cooperation with the flange plate and the valve seat support ring of the valve through the flange limiting block on the fixing frame and the valve seat support ring limiting block on the support rod assembly to play a role of positioning support, and utilizes the threaded cooperation of the connecting rod and the limiting nut to adjust the distance between the fixing frame and the support rod assembly, and transmits the axial force through the connecting rod connected between the fixing frame and the support rod assembly, thereby realizing axial compression of the spring on the valve seat support ring, which can facilitate the installation of the gate plate or the ball; the support rod assembly in the utility model can realize the adjustment of the limiting radial dimension through the cooperation of the support rod and the adjusting nut and the multi-section limiting steps on the flange limiting block, so that the utility model can be suitable for the installation of valves of different sizes and specifications, effectively expanding the scope of application of the utility model and saving a lot of labor costs and manufacturing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of a valve installation auxiliary device in the prior art;

[0016] Figure 2 It is a schematic diagram of the structure of the utility model;

[0017] Figure 3 It is a schematic diagram of the utility model after being assembled with the valve;

[0018] Figure 4 It is a structural schematic diagram of the support rod assembly in the utility model;

[0019] Figure 5 It is a structural schematic diagram of the support rod in the utility model;

[0020] Figure 6 It is a structural schematic diagram of the connecting rod in the utility model;

[0021] Figure 7 It is a structural schematic diagram of the adjusting nut in the utility model;

[0022] Figure 8 This is a structural schematic diagram of the valve seat support ring limit block in the utility model;

[0023] Fig. 9 It is a structural schematic diagram of the fixing frame in the utility model.

[0024] Marked in the figure: 100-fixed frame, 110-adjusting hole, 120-limiting nut, 130-flange limiting block, 200-support rod assembly, 210-valve seat support ring limiting block, 211-limiting groove, 220-support rod, 221-allowing notch, 230-adjusting nut, 231-limiting protrusion, 300-connecting rod, 400-valve, 410-flange, 420-valve seat support ring, 510-bottom plate, 520-top block, 530-guide block, 540-adjusting screw, 550-support plate, 560-pull rod, 570-bolt. DETAILED DESCRIPTION

[0025] In order to facilitate the understanding of the present invention, the present invention is further described below in conjunction with the accompanying drawings.

[0026] In the description of the present invention, it should be noted that the directions or positional relationships indicated by terms such as "front", "rear", "left", "right", "up", "down", and "inside" are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of description. They do not indicate or imply that the device or component referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0027] like Figure 2 As shown, the auxiliary device for valve installation disclosed in the utility model includes a fixing frame 100, a support rod assembly 200 and a connecting rod 300. The fixing frame 100 is provided with a plurality of flange limit blocks 130, the support rod assembly 200 is provided with a plurality of valve seat support ring limit blocks 210, and the connecting rod 300 is detachably connected between the fixing frame 100 and the support rod assembly 200. The distance between the fixing frame 100 and the support rod assembly 200 can be adjusted by connecting the connecting rod 300. Figure 3 As shown, the utility model forms a limiting fit with the flange limit block 130 on the fixed frame 100 and the flange plate 410 outside the valve 400, forms a limiting fit with the valve seat support ring limit block 210 on the support rod assembly 200 and the valve seat support ring 420 inside the valve 400, and adjusts the distance between the fixed frame 100 and the support rod assembly 200 by connecting the pull rod 300, thereby compressing the spring on the valve seat support ring 420 and leaving enough space for installing the gate or the ball.

[0028] Specifically, Figure 4 and Figure 5As shown, the support rod assembly 200 is composed of two support rods 220 vertically cross-connected, and the valve seat support ring limit blocks 210 are installed at the ends of the support rods 220. A buckle part for realizing connection is provided in the middle of the support rod 220, and a buckle connection is formed between the two support rods 220 through the buckle part; the buckle part can be made of hexagonal steel, and a clearance notch 221 is provided on the buckle part. When assembling, the clearance notches 221 of the buckle parts on the two support rods 220 are arranged relative to each other and form a buckle fit with each other. The support rod 220 is provided with threaded sections at both ends, and an adjusting nut 230 is threadedly connected to the threaded section of the support rod 220. The valve seat support ring limit block 210 is detachably connected to the adjusting nut 230. By adjusting the threaded cooperation between the nut 230 and the threaded section on the support rod 220, the spacing between the valve seat support ring limit blocks 210 at both ends of the support rod 220 can be changed, so that the radial limiting dimension of the valve seat support ring limit block 210 on the valve seat support ring 420 can be adjusted to match the valve seat support ring 420 of different sizes. The length of the threaded section on the support rod 220 is preferably set to be the same, so that the adjusting nut 230 can adjust the distance symmetrically.

[0029] Furthermore, in order to facilitate disassembly and assembly, the valve seat support ring limit block 210 and the adjusting nut 230 in the utility model are detachably connected through a matching structure composed of a limit protrusion 231 and a limit groove 211. Figure 7 As shown, a limiting protrusion 231 is fixedly provided at the end of the adjusting nut 230 that is not threadedly connected to the support rod 220, that is, the end of the adjusting nut 230 away from the support rod 220. Figure 8 As shown, a limiting groove 211 is provided at one end of the valve seat support ring limiting block 210 close to the adjusting nut 230, and the limiting protrusion 231 is inserted into the limiting groove 211 to realize the connection between the valve seat support ring limiting block 210 and the adjusting nut 230; when limiting the valve seat support ring 420, the valve seat support ring limiting block 210 is pressed against the valve seat support ring 420 by the axial force of the support rod 220. In addition, in the utility model, the surface of the limiting protrusion 231 is set as a hemispherical surface, and the limiting groove 211 is set as a semicircular groove matched with the limiting protrusion 231, so that point contact is formed between the limiting protrusion 231 and the limiting groove 211, which can not only realize the radial positioning of the valve seat support ring limiting block 210, but also eliminate the influence caused by the interference of the rigid connection force caused by the surface contact.

[0030] Specifically, Fig. 9As shown, the main body of the fixing frame 100 is a circular ring structure, and a circular through hole is provided in the middle of the fixing frame 100 to match the flow channel of the valve 400. The fixing frame 100 is provided with flange limit blocks 130 that are the same in number and correspond to the valve seat support ring limit blocks 210. The flange limit blocks 130 and the fixing frame 100 can be set as an integrated structure to improve the overall strength. The fixing frame 100 is provided with an adjustment hole 110 that is clearance-matched with the connecting rod 300. The structure of the connecting rod 300 is as shown in FIG. Figure 6 As shown, a threaded section is provided at each end of the connecting rod 300, one threaded section of the connecting rod 300 is threadedly connected to the valve seat support ring limit block 210, and the other end of the connecting rod 300 passes through the adjustment hole 110 and is connected to the limit nut 120, and the limit nut 120 abuts against the side of the fixing frame 100 away from the support rod assembly 200, and the detachable connection between the connecting rod 300 and the fixing frame 100 is realized by the limiting cooperation between the limit nut 120 and the fixing frame 100.

[0031] like Figure 2 As shown, the adjustment hole 110 is an elongated through hole provided on the flange stopper 130, and the length of the elongated through hole is greater than the outer diameter of the connecting rod 300, so that the connecting rod 300 can slide along the elongated through hole, so that the connecting rod 300 can be adjusted accordingly according to the position of the valve seat support ring stopper 210, and after adjustment, the connecting rod 300 is fixed to the fixing frame 100 by the limiting effect of the limiting nut 120; in addition, the spacing between the fixing frame 100 and the supporting rod assembly 200 can also be adjusted by rotating the limiting nut 120. The extension length of the external thread of the connecting rod 300 at one end matching with the limiting nut 120 is greater than the extension length of the external thread of the connecting rod 300 at one end matching with the valve seat support ring stopper 210. The rotation direction of the external threads at both ends of the connecting rod 300 is set to be the same. When the limit nut 120 is rotated to adjust the distance between the fixing frame 100 and the support rod assembly 200, the threaded connection between the connecting rod 300 and the valve seat support ring limit block 210 will be tighter and will not loosen, thereby ensuring that the connecting rod 300 can successfully complete the force transmission.

[0032] like Figure 2 and Figure 8 As shown, at least one limiting step is provided on the valve seat support ring limiting block 210, and the limiting step on the valve seat support ring limiting block 210 is used to form a limiting match with the valve seat support ring 420 for positioning. Figure 2 and Fig. 9As shown, a stopper formed by a plurality of stopper steps is provided on the flange stopper block 130. The utility model utilizes the stopper steps on the flange stopper block 130 to form a stopper match with the flange 410 for positioning. By changing the matching position of the different levels of stopper steps on the flange 410 to adapt to valves of different pressures and calibers, the corresponding stopper steps on the stopper can be selected according to the size specifications of the corresponding valve. The step surfaces of the stopper steps on the flange stopper block 130 and the valve seat support ring stopper block 210 are both set as arc surfaces, so that the flange stopper block 130 and the circular flange 410 fit more closely, and there is a designed gap between the valve seat support ring stopper block 210 and the bottom of the valve seat support ring 420, which can be applied to the inner diameter of the valve seat support ring 420 of different sizes, and will not affect the size of the axial contact surface between the valve seat support ring stopper block 210 and the clamping ring groove of the valve seat support ring 420, ensuring that the axial force that overcomes the spring compression force produces the shear stress.

[0033] like Figure 3 As shown, when the auxiliary device for valve installation of the utility model is used to install the gate or ball of the valve 400, the following steps are followed:

[0034] S1. Install the adjusting nuts 230 at equal distances on the threaded sections at both ends of the support rod 220, and then reserve an adjustment gap of 2 to 3 mm according to the inner diameter of the valve seat support ring 420;

[0035] S2, place the valve seat support ring limit block 210 in the clamping ring groove of the valve support ring 420, and then put the first support rod 220 with the adjusting nut 230 installed into the valve 400, so that the limiting protrusion 231 at the end of the adjusting nut 230 is inserted into the limiting groove 211 of the corresponding valve seat support ring limit block 210, and the yielding notch 221 of the buckle part on the first support rod 220 faces the direction of the flange 410;

[0036] S3, repeat step S2 to install the second support rod 220, and connect the gaps 221 of the two support rods 220 to each other;

[0037] S4, threading the connecting rod 300 and the valve seat support ring limit block 210;

[0038] S5. Select the stopper positioning position of the fixing frame 100 according to the flow channel size of the valve 400, place the flange stopper 130 on the fixing frame 100 against the flange 410, install the stopper nut 120 after the connecting rod 300 passes through the adjustment hole 110 and tighten it manually;

[0039] S6. Use a fixed wrench or an adjustable wrench to further tighten the limit nut 120. First tighten the limit nut 120 in the horizontal direction and then tighten the limit nut 120 in the vertical direction. Repeat this cycle until the spring of the valve seat support ring 420 is completely compressed into place, and then install the gate or ball.

Claims

1. Auxiliary device for valve installation, characterized in that: The invention comprises a fixing frame (100) and a support rod assembly (200); a plurality of connecting rods (300) are arranged between the fixing frame (100) and the support rod assembly (200); one end of the connecting rod (300) is detachably connected to the support rod assembly (200); an adjusting hole (110) is arranged on the fixing frame (100) and is clearance-matched with the connecting rod (300); the other end of the connecting rod (300) passes through the corresponding adjusting hole (110) and is threadedly connected to a limiting nut (120) abutting against a side of the fixing frame (100) away from the support rod assembly (200); a plurality of flange limiting blocks (130) are fixed on the fixing frame (100); and a plurality of valve seat support ring limiting blocks (210) are fixed on the support rod assembly (200).

2. The auxiliary device for valve installation according to claim 1, characterized in that: The support rod assembly (200) is composed of two support rods (220) connected in a vertically staggered manner; the middle part of the support rod (220) is a buckle portion, and a clearance notch (221) is provided on the buckle portion; both ends of the support rod (220) are threaded sections, and the two support rods (220) are buckled in connection through the clearance notch (221) of the buckle portion; the threaded section of the support rod (220) is threadedly connected with an adjusting nut (230), and the adjusting nut (230) is detachably connected to the valve seat support ring limit block (210).

3. The auxiliary device for valve installation according to claim 2, characterized in that: A limiting protrusion (231) is fixed to one end of the adjusting nut (230) away from the supporting rod (220), and the surface of the limiting protrusion (231) is a hemispherical surface; a limiting groove (211) is provided to one end of the valve seat supporting ring limiting block (210) close to the adjusting nut (230), and the limiting groove (211) is a semicircular groove adapted to the limiting protrusion (231).

4. The auxiliary device for valve installation according to claim 1, characterized in that: The flange limit block (130), the valve seat support ring limit block (210) and the connecting rod (300) are of the same number and arranged at corresponding positions, and the two ends of the connecting rod (300) are respectively matched with the flange limit block (130) and the valve seat support ring limit block (210).

5. The auxiliary device for valve installation according to claim 4, characterized in that: The adjustment hole (110) is a long strip through hole arranged on the flange limit block (130), and the connecting rod (300) is detachably connected to the valve seat support ring limit block (210).

6. The auxiliary device for valve installation according to claim 5, characterized in that: The connecting rod (300) is threadedly connected to the valve seat support ring limit block (210), and the extension length of the external thread at one end of the connecting rod (300) that cooperates with the limit nut (120) is greater than the extension length of the external thread at one end of the connecting rod (300) that cooperates with the valve seat support ring limit block (210), and the rotation direction of the external threads at both ends of the connecting rod (300) is the same.

7. The auxiliary device for valve installation according to claim 1, characterized in that: A circular through hole adapted to the flow channel of the valve is provided in the middle of the fixing frame (100), and the flange limit block (130) and the fixing frame (100) are an integral structure.

8. The auxiliary device for valve installation according to claim 1, characterized in that: The flange limit block (130) is provided with a stop formed by a plurality of limit steps, and the valve seat support ring limit block (210) is provided with at least one limit step; the step surfaces of the limit steps on the flange limit block (130) and the valve seat support ring limit block (210) are both arc surfaces.

Images