Valve pressure test fixing clamp

Abstract

The utility model discloses a valve pressure test fixing clamp, which comprises a box body, specifically a left box body and a right box body, the lower parts of the left box body and the right box body are connected with each other through a group of parallel pull rods, a fixed plate and a movable plate which are parallel are arranged in the middle of the group of parallel box bodies, and pressure test blind plates are fixed on the opposite inner sides of the fixed plate and the movable plate; a guide column is arranged between the fixed plate and the movable plate, one side of the movable plate is connected to the right box body through a horizontal adjusting device, and the distance between the two pressure test blind plates is adjusted under the action of the horizontal adjusting device. The distance between the movable plate and the fixed plate is adjusted, the two ends of the valve body can be fixed, air pipes and pressure transformers are connected to the pressure test blind plates at the two ends, pressure test operation is achieved, meanwhile, the pressure test device can be matched with hydraulic equipment, the extension length of a thrust rod is adjusted according to the sizes of different valve bodies, and the purpose of manually adjusting the stroke of a traditional pressure test machine is achieved.

Description

Technical Field

[0001] This utility model relates to the field of valve manufacturing technology, specifically to a valve pressure testing fixture. Background Technology

[0002] Valves are an important component of industrial pipelines and a key product for the safe operation of the entire pipeline network. Therefore, ensuring valve safety and preventing leakage is crucial, and pressure testing to ensure no leakage is an indispensable part of production.

[0003] In the production process of ball valves, pressure testing is an essential step for valve manufacturers. The hydraulic rod drives the adjustment of the distance between the fixed plate and the moving plate to fix the valve for pressure testing. Different valve bodies have different sizes, which requires pressure testing equipment with different opening sizes. Generally, the reciprocating stroke of the pressure testing machine is limited. When customers customize valves with longer structures, the original pressure testing machine may not be able to complete the pressure test due to insufficient hydraulic rod stroke. That is, even when the hydraulic rod is extended to its maximum length, it cannot clamp and fix both ends of the valve body. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a valve pressure testing fixture.

[0005] The specific technical solution is as follows:

[0006] A valve pressure testing fixture includes a set of parallel housings, specifically a left housing and a right housing, with the lower parts of the left housing and the right housing connected to each other by a set of parallel tie rods. A parallel fixed plate and a movable plate are provided in the middle of the set of parallel housings. Pressure testing blind plates are fixed to the inward-facing sides of both the fixed plate and the movable plate. A set of parallel guide posts are provided between the fixed plate and the movable plate. One side of the movable plate is connected to the right housing via a horizontal adjustment device, which adjusts the distance between the two pressure testing blind plates.

[0007] The horizontal adjustment device includes a push rod and a handwheel. One end of the push rod is connected to one side of the test pressure blind plate, and the test pressure blind plate is moved horizontally by rotating the handwheel.

[0008] Furthermore, the leveling device also includes a push rod seat and a push rod seat nut. The push rod seat is fixed to the right housing. The push rod seat and the push rod seat nut are threadedly connected and hollow at both ends. A valve stem nut is provided inside. The valve stem nut is sleeved on the push rod. The handwheel is fixedly connected to the valve stem nut. The outer edge of the push rod and the inner wall of the valve stem nut are provided with mutually meshing threads.

[0009] Furthermore, the push rod seat and the push rod seat nut are provided with two thrust ball bearings inside the cavity, which are respectively located on the two side walls of the cavity.

[0010] Compared with the prior art, the technical solution proposed by this utility model has the following advantages: by manually turning the handwheel, the movable plate is moved axially, thereby adjusting the distance between the movable plate and the fixed plate. This allows for the fixing of both ends of the valve body, and the connection of air pipes and pressure transformers to the pressure test blind plates at both ends to achieve the pressure test operation. At the same time, it can also be used with hydraulic equipment to adjust the extension length of the thrust rod according to different valve body sizes, thereby achieving the purpose of manually adjusting the stroke of the traditional pressure tester. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 This is a top view of the present invention;

[0014] Figure 3 This is the front view of the present utility model;

[0015] Figure 4 for Figure 3 Enlarged view of a portion of the image;

[0016] In the diagram: 1-Left housing, 2-Right housing, 3-Pull rod, 4-Fixed plate, 5-Moving plate, 6-Test pressure blind plate, 7-Guide column, 8-Horizontal adjustment device, 801-Thrust rod, 802-Handwheel, 803-Push rod seat, 804-Push rod seat nut, 805-Valve stem nut, 806-Thrust ball bearing, 9-Moving seat, 10-Moving seat nut, 11-Sliding bearing, 12-Hydraulic rod. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. The described embodiments are only some embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the utility model.

[0018] In the relevant existing technologies, the reciprocating stroke of the pressure testing machine is limited. When customers customize valves that are longer or other customized types, the original pressure testing machine may not be able to complete the pressure test due to insufficient stroke. That is, even when the hydraulic rod extends to its maximum length, it cannot clamp and fix both ends of the valve body.

[0019] To address the problems existing in the relevant prior art, this utility model proposes a valve pressure testing fixing fixture. The principle and structure of this utility model will be described in detail below with reference to the accompanying drawings and embodiments. Example

[0020] Please see Figures 1 to 4 The valve pressure testing fixture includes a set of parallel housings, specifically a left housing 1 and a right housing 2. The lower parts of the left housing 1 and the right housing 2 are connected to each other by a set of parallel tie rods 3. A parallel fixed plate 4 and a movable plate 5 are provided in the middle of the set of parallel housings. A pressure testing blind plate 6 is fixed on the inner side of the fixed plate 4 and the movable plate 5. The pressure testing blind plate 6 is used to press against the flanges at both ends of the valve to form a sealed space. A set of parallel guide posts 7 are provided between the fixed plate 4 and the movable plate 5. In this way, during the reciprocating movement, the two pressure testing blind plates 6 are kept parallel and will not be misaligned when pressed. One side of the movable plate 5 is connected to the right housing 2 through a horizontal adjustment device 8, and the distance between the two pressure testing blind plates 6 is adjusted under the action of the horizontal adjustment device 8. The horizontal adjustment device 8 includes a push rod 801 and a handwheel 802. One end of the push rod 801 is connected to one side of the pressure testing blind plate 6, and the pressure testing blind plate 6 is moved horizontally by rotating the handwheel 802.

[0021] The horizontal adjustment device 8 also includes a push rod seat 803 and a push rod seat nut 804. The push rod seat 803 is fixed on the right housing 2. The push rod seat 803 and the push rod seat nut 804 are threadedly connected and are hollow with open ends. A valve stem nut 805 is provided inside. The valve stem nut 805 is sleeved on the push rod 801. The handwheel 802 is fixedly connected to the valve stem nut 805. The outer edge of the push rod 801 and the inner wall of the valve stem nut 805 are provided with interlocking threads. By rotating the handwheel 802, the valve stem nut 805 is driven to rotate. The push rod 801 will move horizontally as the handwheel 802 rotates, and finally drive the moving plate to move horizontally.

[0022] The push rod seat 803 and the push rod seat nut 804 are also provided with thrust ball bearings 806 inside the cavity. There are two thrust ball bearings 806, which are respectively located on the two side walls of the cavity.

[0023] Furthermore, a set of guide pillars 7 are fixed at both ends on a set of housings, and the movable plate 5 is connected to the guide pillars 7 through the movable seat 9 and the movable seat nut 10. The movable seat 9 is equipped with a sliding bearing 11.

[0024] The specific working principle is as follows: First, rotate the handwheel 801 to move the moving plate 5, ensuring that the distance between the fixed plate 4 and the moving plate 5 can accommodate the valve to be tested. Then, the valve is hoisted between the moving plate and the fixed plate. Next, rotate the handwheel to move the fixed plate 4 and the moving plate 5 towards each other, ensuring that the two test pressure blind plates are aligned with the openings at both ends of the valve. By rotating the handwheel, the valve and the two test pressure blind plates on both sides form a sealed space. Connect the air pipe and pressure gauge to the test pressure blind plate, introduce pressurized air, and check for any leakage.

[0025] By manually turning the handwheel, the movable plate can be moved axially to adjust the distance between the movable plate and the fixed plate. This allows for the fixing of both ends of the valve body, and the connection of air pipes and pressure transformers to the pressure test blind plates at both ends to perform pressure testing. It can also be used in conjunction with hydraulic equipment to adjust the extension length of the thrust rod according to different valve body sizes, thereby achieving the purpose of manually adjusting the stroke of the traditional pressure testing machine.

[0026] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A valve pressure testing fixture, characterized by: It includes a set of parallel boxes, specifically a left box (1) and a right box (2), and the lower parts of the left box (1) and the right box (2) are connected to each other by a set of parallel pull rods (3). A set of parallel fixed plates (4) and movable plates (5) are provided in the middle of the set of parallel boxes. Test pressure blind plates (6) are fixed on the inner sides of the fixed plates (4) and the movable plates (5). A set of parallel guide posts (7) is provided in the middle of the fixed plates (4) and the movable plates (5). One side of the movable plates (5) is connected to the right box (2) through a horizontal adjustment device (8), and the distance between the two test pressure blind plates (6) is adjusted under the action of the horizontal adjustment device (8). The horizontal adjustment device (8) includes a push rod (801) and a handwheel (802). One end of the push rod (801) is connected to one side of the test pressure blind plate (6), and the test pressure blind plate (6) is moved horizontally by rotating the handwheel (802).

2. The valve pressure testing fixture of claim 1, wherein: The leveling device also includes a push rod seat (803) and a push rod seat nut (804). The push rod seat (803) is fixed on the right housing (2). The push rod seat (803) and the push rod seat nut (804) are threaded together and hollow inside with open ends. A valve stem nut (805) is provided inside. The valve stem nut (805) is sleeved on the push rod (801). The handwheel (802) is fixedly connected to the valve stem nut (805). The outer edge of the push rod (801) and the inner wall of the valve stem nut (805) are provided with mutually meshing threads.

3. The valve pressure testing fixture of claim 2, wherein: The push rod seat (803) and the push rod seat nut (804) are also provided with thrust ball bearings (806) in their internal cavities. There are two thrust ball bearings (806) and they are respectively located on the two side walls of the internal cavity.

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