Valve sealing performance test equipment

Abstract

The utility model relates to the technical field of valve sealing performance testing, and discloses a valve sealing performance testing device which comprises a fixing frame, a hydraulic cylinder is fixed to the left side of the fixing frame through bolts, a fixing mechanism used for fixing a valve is arranged at the telescopic end of the hydraulic cylinder, a connecting piece is welded to the side wall of the fixing frame, and the connecting piece is connected with the hydraulic cylinder through bolts. The upper surface of the connecting piece is provided with a flow limiting mechanism used for limiting flow of the inflation pipe. The fixing mechanism comprises a movable plate, the movable plate is fixed to the telescopic end of the hydraulic cylinder, and four connecting rods penetrating through the fixing frame are welded to the right side of the movable plate. The movable plate is driven by the hydraulic cylinder to move horizontally, the limiting plate can be driven under the action of the connecting rod, then the valve body is pulled to be close to the connecting piece for sealing, the valve does not need to be in contact with a water source during testing, subsequent air drying is not needed, and the situation that residual water in the valve is prone to being corroded and rusted is effectively avoided.

Description

Technical Field

[0001] This utility model relates to the field of valve sealing performance testing technology, specifically a valve sealing performance testing device. Background Technology

[0002] Valve sealing performance testing equipment is a specialized device used to test the sealing performance of valves under specific pressure or vacuum conditions. Its core function is to verify whether the valve can effectively prevent media leakage when closed. This equipment is widely used in valve manufacturing, industrial installation, quality inspection, and maintenance, and is a crucial process for ensuring valve safety and reliability. By simulating actual working conditions, valve sealing performance testing equipment quantitatively or qualitatively tests the valve's sealing performance to determine whether it meets design standards or industry specifications.

[0003] In existing technologies, such as the brass valve sealing performance testing device disclosed in CN221859837U, a workbench is included. The workbench has legs at its bottom, a base plate is mounted on one side of a mounting frame, and a threaded rod passes through the other side of the mounting frame. Rubber pads are installed on one side of both the limiting plate and the base plate. The device utilizes a mounting frame mounted on the bottom of a push plate, with the threaded rod and mounting frame connected by a threaded connection. Rotation of the rotating wheel drives the threaded rod to rotate, which in turn moves the limiting plate. The threaded rod passes through a positioning ring, which prevents the threaded rod from shifting. The movement of the limiting plate and its cooperation with the base plate clamp the valve between them, limiting its position. The rubber pads seal the valve opening, ensuring an internal seal for easy testing.

[0004] Existing testing equipment uses a mounting bracket installed at the bottom of the push plate, with a threaded rod and mounting bracket connected by threads to limit the valve. A rubber gasket can seal the valve opening, making the valve internally sealed and facilitating testing. However, the valve needs to be circulated with water during testing. Although it is dried by blowing air after testing, it cannot effectively dry the inside, leading to residual water inside that is prone to corrosion. Utility Model Content

[0005] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0006] Given that the existing technology requires water to be passed through the valve during testing, and although air is blown to dry it after testing, it cannot effectively dry the inside, resulting in residual water inside that is prone to corrosion.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A valve sealing performance testing device includes a fixed frame, a hydraulic cylinder is fixed to the left side of the fixed frame by bolts, the telescopic end of the hydraulic cylinder is provided with a fixing mechanism for fixing the valve, a connector is welded to the side wall of the fixed frame, and a flow limiting mechanism for limiting the flow of the air inlet tube is provided on the upper surface of the connector.

[0009] The fixing mechanism includes a movable plate, which is fixed to the telescopic end of the hydraulic cylinder. Four connecting rods are welded to the right side of the movable plate, penetrating the interior of the fixing frame. The ends of the connecting rods are connected to a limit plate, and fixing bolts are installed inside the limit plate.

[0010] As a further improvement of this utility model, the end of the fixing bolt is threaded with a threaded hole opened at one end of the connecting rod.

[0011] As a further improvement of this utility model: a valve body is connected to the right side of the connector, and a sealing plate is installed on the right side of the valve body.

[0012] As a further improvement of this utility model, the sealing plate is equipped with four fixing screws that are threadedly connected to the valve body.

[0013] As a further embodiment of this utility model: the flow limiting mechanism includes an air intake component, which is connected to the upper surface of the connector, and a fixing plate is welded inside the air intake component.

[0014] As a further improvement of this utility model: the inner wall of the fixing plate is provided with a through hole, and a sealing sheet is movably connected to the lower surface of the fixing plate.

[0015] As a further improvement of this utility model: two guide rods fixedly connected to the air intake component pass through the interior of the sealing sheet, a mounting plate is welded to one side of the guide rod, and a compression spring fixedly connected to the sealing sheet is abutted on the upper surface of the mounting plate.

[0016] As a further improvement of this utility model: the upper end of the connector is connected to a solenoid valve, and a pressure gauge is installed on one side of the solenoid valve.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. This utility model uses a hydraulic cylinder to drive the movable plate to move horizontally. Under the action of the connecting rod, it can drive the limiting plate, thereby pulling the valve body closer to the connecting part for sealing. When testing the valve, there is no need to contact the water source, and there is no need for subsequent air drying, which effectively avoids the situation where residual water inside the valve is prone to corrosion and rust.

[0019] 2. In this utility model, the compression spring on the mounting plate pushes the sealing plate towards the fixed plate during the process of the compression spring extending and resetting, thereby sealing the fixed plate and preventing the compressed nitrogen gas filled inside the valve body from being discharged to the outside. Attached Figure Description

[0020] Figure 1 A three-dimensional structural diagram of a valve sealing performance testing device;

[0021] Figure 2 This is a three-dimensional structural diagram of a mounting bracket in a valve sealing performance testing device.

[0022] Figure 3 This is a three-dimensional structural diagram of a movable plate in a valve sealing performance testing device;

[0023] Figure 4 This is a schematic cross-sectional view of the air inlet component in a valve sealing test device.

[0024] Figure 5 This is a three-dimensional structural diagram of a connecting rod in a valve sealing test device.

[0025] In the diagram: 1. Fixed frame; 2. Hydraulic cylinder; 3. Movable plate; 31. Connecting rod; 32. Limiting plate; 33. Fixing bolt; 34. Threaded hole; 4. Connecting piece; 5. Valve body; 6. Sealing plate; 7. Fixing screw; 8. Air inlet; 81. Fixed plate; 82. Through hole; 83. Sealing sheet; 84. Guide rod; 85. Mounting plate; 86. Compression spring; 9. Solenoid valve; 10. Pressure gauge. Detailed Implementation

[0026] To make the above-mentioned objectives, features and advantages of this utility model more readily understood, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0027] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0028] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single embodiment or an embodiment selectively excluded from other embodiments.

[0029] Please see Figures 1-5 This is the first embodiment of the present invention. This embodiment provides a valve sealing test device, including a fixed frame 1. A hydraulic cylinder 2 is fixed to the left side of the fixed frame 1 by bolts. The telescopic end of the hydraulic cylinder 2 is provided with a fixing mechanism for fixing the valve. A connector 4 is welded to the side wall of the fixed frame 1. A flow limiting mechanism for limiting the flow of the air filling pipe is provided on the upper surface of the connector 4.

[0030] The fixing mechanism includes a movable plate 3, which is fixed to the telescopic end of the hydraulic cylinder 2. Four connecting rods 31 are welded to the right side of the movable plate 3, which penetrate the interior of the fixing frame 1. The ends of the connecting rods 31 are connected to a limit plate 32, and fixing bolts 33 are installed inside the limit plate 32.

[0031] Specifically, the end of the fixing bolt 33 is threaded with a threaded hole 34 at one end of the connecting rod 31.

[0032] Furthermore, the limiting plate 32 is placed on the outside of the flange of the valve body 5, and the fixing bolts 33 are tightened to fix the limiting plate 32.

[0033] Specifically, the valve body 5 is connected to the right side of the connector 4, and a sealing plate 6 is installed on the right side of the valve body 5.

[0034] Furthermore, the hydraulic cylinder 2 drives the movable plate 3 to move horizontally, and under the action of the connecting rod 31, it drives the limit plate 32, pulling the valve body 5 closer to the connecting piece 4 and sealing it.

[0035] Specifically, the sealing plate 6 has four fixing screws 7 that are threadedly connected to the valve body 5.

[0036] Furthermore, the sealing plate 6 is connected to the flange at the other end of the valve body 5 and fixed with fixing screws 7 to seal the valve body 5.

[0037] In use, the mounting bracket 1 is placed in a suitable position, and then one end of the valve body 5 to be tested is connected to the connector 4. The limiting plate 32 is then placed on the outside of the valve body 5 flange through the threaded hole 34 on the connecting rod 31, and the fixing bolts 33 are tightened to connect with the threaded hole 34, thus fixing the limiting plate 32. At this time, the hydraulic cylinder 2 is activated, driving the movable plate 3 to move horizontally. Under the action of the connecting rod 31, the limiting plate 32 is moved, thereby pulling the valve body 5 closer to the connector 4 and sealing it. A sealing ring is provided at the connection between the connector 4 and the valve body 5 to improve the sealing effect. Then, the sealing plate 6 is connected to the flange at the other end of the valve body 5 and fixed with the fixing screws 7. The pressure is recorded, and after the predetermined test time, the internal air pressure is observed again. If the air pressure does not change, the valve sealing performance is good; if the air pressure changes, the valve sealing performance is poor. This equipment does not require contact with water during valve testing, thus eliminating the need for subsequent drying and effectively preventing corrosion and rust caused by residual water inside the valve.

[0038] In summary, when the valve sealing test equipment is in use, the hydraulic cylinder 2 drives the movable plate 3 to move horizontally. Under the action of the connecting rod 31, it can drive the limit plate 32, thereby pulling the valve body 5 closer to the connecting piece 4 and sealing it. The valve does not need to come into contact with water during testing, and therefore does not need to be dried afterward, effectively avoiding the situation where residual water inside the valve is prone to corrosion and rust.

[0039] Please see Figures 1-5 This is the second embodiment of the present utility model.

[0040] Specifically, the flow limiting mechanism includes an air intake component 8, which is connected to the upper surface of the connector 4. A fixing plate 81 is welded inside the air intake component 8. A through hole 82 is opened on the inner wall of the fixing plate 81. A sealing sheet 83 is movably connected to the lower surface of the fixing plate 81.

[0041] Furthermore, the external gas supply equipment inputs compressed nitrogen into the air inlet 8 through a pipeline. After the compressed nitrogen enters the air inlet 8, it pushes the sealing plate 83 to move through the through hole 82 on the fixed plate 81.

[0042] Specifically, the interior of the sealing sheet 83 has two guide rods 84 that are fixedly connected to the air intake component 8. A mounting plate 85 is welded to one side of the guide rod 84, and a compression spring 86 that is fixedly connected to the sealing sheet 83 is abutted on the upper surface of the mounting plate 85.

[0043] Furthermore, through the compression spring 86 on the mounting plate 85, during the process of the compression spring 86 extending and resetting, it will push the sealing plate 83 to move towards the fixed plate 81, thereby sealing the fixed plate 81. At this time, the compressed nitrogen gas filled inside the valve body 5 cannot be discharged to the outside.

[0044] Specifically, the upper end of the connector 4 is connected to a solenoid valve 9, and a pressure gauge 10 is installed on one side of the solenoid valve 9.

[0045] Furthermore, the internal pressure can be detected and recorded by the pressure gauge 10 installed between the solenoid valve 9 and the connector 4.

[0046] In use, the air inlet 8 is connected to an external gas supply device. The external gas supply device supplies compressed nitrogen to the air inlet 8 through a pipeline. After the compressed nitrogen enters the air inlet 8, it pushes the sealing plate 83 to move through the through hole 82 on the fixed plate 81. The guide rod 84 can guide and limit the movement. At this time, the sealing plate 83 separates from the fixed plate 81, allowing the compressed nitrogen to flow through the gap between the sealing plate 83 and the air inlet 8, and then enter the connector 4. Finally, it is supplied to the valve body 5. After the compressed nitrogen is supplied, the compression spring 86 on the mounting plate 85 pushes the sealing plate 83 to move towards the fixed plate 81 during its extension and reset process, thereby sealing the fixed plate 81. At this time, the compressed nitrogen filled inside the valve body 5 cannot be discharged to the outside. The internal pressure can be detected by the pressure gauge 10 set between the solenoid valve 9 and the connector 4. The compressed nitrogen inside is discharged by opening the solenoid valve 9.

[0047] In summary, when the valve sealing test equipment is in use, the hydraulic cylinder 2 drives the movable plate 3 to move horizontally. Under the action of the connecting rod 31, it can drive the limiting plate 32, thereby pulling the valve body 5 closer to the connecting piece 4 and sealing it. The valve does not need to come into contact with water during testing, and therefore does not need to be dried afterward. This effectively avoids the situation where residual water inside the valve can easily cause corrosion and rust. Furthermore, through the compression spring 86 on the mounting plate 85, during the process of the compression spring 86 extending and resetting, it will push the sealing plate 83 to move towards the fixed plate 81, thereby sealing the fixed plate 81 and preventing the compressed nitrogen gas filled inside the valve body 5 from being discharged to the outside.

[0048] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape, and proportions of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Without departing from the scope of this invention, other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0049] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to implementing the present invention) may be omitted.

[0050] It should be understood that numerous specific implementation decisions can be made during the development of any actual implementation method, and in any engineering or design project. Such development efforts may be complex and time-consuming, but for those of ordinary skill in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0051] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A valve sealing performance testing device, comprising a mounting frame (1), characterized in that: A hydraulic cylinder (2) is fixed to the left side of the fixed frame (1) by bolts. The telescopic end of the hydraulic cylinder (2) is provided with a fixing mechanism for fixing the valve. A connector (4) is welded to the side wall of the fixed frame (1). A flow limiting mechanism for limiting the flow of the air inlet pipe is provided on the upper surface of the connector (4). The fixing mechanism includes a movable plate (3), which is fixed to the telescopic end of the hydraulic cylinder (2). Four connecting rods (31) that penetrate the inside of the fixing frame (1) are welded to the right side of the movable plate (3). The end of the connecting rod (31) is connected to a limit plate (32), and a fixing bolt (33) is installed inside the limit plate (32).

2. The valve sealing performance testing equipment according to claim 1, characterized in that: The end of the fixing bolt (33) is threadedly connected to a threaded hole (34) opened at one end of the connecting rod (31).

3. The valve sealing performance testing equipment according to claim 2, characterized in that: The valve body (5) is connected to the right side of the connector (4), and a sealing plate (6) is installed on the right side of the valve body (5).

4. The valve sealing performance testing equipment according to claim 3, characterized in that: The sealing plate (6) has four fixing screws (7) that are threadedly connected to the valve body (5) installed inside.

5. The valve sealing performance testing equipment according to claim 1, characterized in that: The flow limiting mechanism includes an air intake component (8), which is connected to the upper surface of the connector (4), and a fixing plate (81) is welded inside the air intake component (8).

6. The valve sealing performance testing equipment according to claim 5, characterized in that: The inner wall of the fixing plate (81) is provided with a through hole (82), and a sealing sheet (83) is movably connected to the lower surface of the fixing plate (81).

7. The valve sealing performance testing device according to claim 6, characterized in that: The interior of the sealing sheet (83) has two guide rods (84) that are fixedly connected to the air intake (8). A mounting plate (85) is welded to one side of the guide rod (84), and a compression spring (86) that is fixedly connected to the sealing sheet (83) is abutted on the upper surface of the mounting plate (85).

8. The valve sealing performance testing device according to claim 7, characterized in that: The upper end of the connector (4) is connected to a solenoid valve (9), and a pressure gauge (10) is installed on one side of the solenoid valve (9).

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