Performance testing device for hard sealing gate valve
By designing automated fixing and testing components, the problems of time-consuming and labor-intensive manual operation and inaccurate simulation in the performance testing of hard-seal gate valves have been solved, achieving efficient and accurate multi-physics simulation and testing.
Patent Information
- Application Number
- CN202610047955.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-01-14
- Publication Date
- 2026-03-31
AI Technical Summary
Existing performance testing devices for hard-seal gate valves cannot fully simulate the interaction of multiple physical fields (such as thermal-fluid coupling), resulting in deviations between test results and actual operating conditions. Furthermore, the testing process relies on manual operation, leading to time-consuming, labor-intensive, and error-prone processes.
A performance testing device including a fixing component, a testing component, and a limit adjustment component was designed. The device uses components such as an electric cylinder, a rotary motor, and a magnetic ring encoder to achieve automatic fixing and precise adjustment of a hard-seal gate valve, simulate a thermal-fluid coupling environment, and coordinates the components through a controller for automated testing.
It enables precise fixing and automated testing of hard-seal gate valves, reduces human error, improves testing efficiency, and accurately simulates the interaction of multiple physical fields, thereby enhancing the accuracy of test results.
Smart Images
Figure CN121762212A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of testing equipment technology, specifically to a performance testing device for hard-seal gate valves. Background Technology
[0002] The performance testing device for hard-seal gate valves is a specialized device used to detect and evaluate whether hard-seal gate valves meet technical requirements in terms of working pressure, sealing performance, durability, and operating characteristics. By simulating media flow, pressure changes, and temperature environment under actual working conditions, it quantitatively measures and verifies key parameters such as valve opening and closing torque, leakage, sealing surface wear resistance, and overall reliability to ensure its safe and effective operation in industrial pipeline systems. Because hard-seal gate valves are often used in high-temperature, high-pressure, and corrosive environments, existing testing equipment struggles to fully simulate the interactions of multiple physical fields (such as thermal-fluid coupling), leading to discrepancies between test results and actual operating conditions. Furthermore, current testing of hard-seal gate valves requires manual fixing, which is time-consuming and labor-intensive for large-scale testing, and improper installation can also cause measurement errors. Additionally, the traditional testing process for hard-seal gate valves relies on manual operation and adjustment of the valve's opening and closing degree, which is prone to human error and inefficient.
[0003] Therefore, a performance testing device for hard-seal gate valves is needed to improve the above-mentioned problems. Summary of the Invention
[0004] To address the problem that existing testing devices for hard-seal gate valves cannot fully simulate the interaction of multiple physical fields (such as thermal-fluid coupling) when testing hard-seal gate valves, resulting in deviations between test results and actual operating conditions, this invention provides a performance testing device for hard-seal gate valves to solve the aforementioned problem.
[0005] To achieve the above objectives, the present invention provides the following technical solution: A performance testing device for a hard-seal gate valve includes an equipment frame and a fluid storage tank, wherein a controller is installed on the outer wall of the equipment frame, and a control panel is installed on the outer wall of the equipment frame. A fluid pressure gauge is installed on the outer wall of the equipment frame. A fixing component is installed on the outer wall of the equipment frame. A testing component is installed on the outer wall of the equipment frame. A limit adjustment component is installed on the outer wall of the equipment frame. A fluid storage tank is installed on the outer wall of the fluid storage tank. A pump is installed on the outer wall of the pump. An outlet pipe is installed at the outlet of the pump. A connecting pipe is installed at one end of the outlet pipe. The connecting pipe is located on the outer wall of the fluid storage tank. A conduit is installed at one end of the connecting pipe. A return pipe is installed on the outer wall of the fluid storage tank.
[0006] In a preferred embodiment of the present invention, the fixing component includes a limiting guide rail, which is installed on the outer wall of the equipment frame. A sliding base is slidably connected to the inner wall of the limiting guide rail. A fluid sensor is disposed on the outer wall of the sliding base, wherein the sensing end of the fluid sensor extends into the inner cavity of the sliding base. A connecting flange is installed on the outer wall of the sliding base, and a limiting rod is disposed on the outer wall of the connecting flange. An electrically controlled cylinder is installed on the outer wall of the sliding base, wherein the electrically controlled cylinder is disposed on the base surface of the equipment frame, and a return pipe is connected directly above the electrically controlled cylinder and located on the outer wall of the sliding base.
[0007] As a preferred embodiment of the present invention, the test component includes a mounting bracket, which is mounted on the outer wall of the equipment frame. A four-way solenoid valve is mounted on the outer wall of the mounting bracket. One end of the four-way solenoid valve is connected to a conduit, and a heater is mounted on the other end of the four-way solenoid valve via a diverter pipe. The heater is mounted on the outer wall of the equipment frame.
[0008] As a preferred embodiment of the present invention, the other end of the four-way solenoid valve is mounted on a fixed base via a second diverter pipe. The fixed base is mounted on the base surface of the equipment frame, and the heater is connected to the fixed base via an outlet pipe.
[0009] As a preferred embodiment of the present invention, a second fluid sensor is provided on the outer wall of the fixed base, wherein the sensing end of the second fluid sensor extends into the inner cavity of the fixed base, a fixed flange is installed on the outer wall of the fixed base, and a hard-seal gate valve is installed on the outer wall of the fixed flange, wherein one end of the hard-seal gate valve is plugged into and connected to the outer wall of the connecting flange.
[0010] As a preferred embodiment of the present invention, the limit adjustment component includes a mounting frame, which is mounted on the outer wall of the equipment frame. A positioning guide rail is mounted on the outer wall of the mounting frame, and a mounting frame is slidably connected to the outer wall of the positioning guide rail. An electrically controlled push cylinder is mounted on the inner wall of the mounting frame, wherein one end of the electrically controlled push cylinder is connected to the mounting frame, and a rotary motor is mounted on the inner wall of the mounting frame.
[0011] As a preferred embodiment of the present invention, a guide rod is installed at one end of the rotary motor, wherein the guide rod is rotatably connected to the outer wall of the mounting frame, a plug-in gripper is installed at one end of the guide rod, and a handwheel of a hard-seal gate valve is plugged into and plugged into one end of the plug-in gripper. A mounting plate is installed on the outer wall of the mounting frame, a fixing column is installed on the outer wall of the mounting plate, and a magnetic ring encoder is installed at one end of the fixing column.
[0012] As a preferred embodiment of the present invention, the encoder magnetic ring of the magnetic ring encoder is disposed on the outer wall of the guide rod, and the encoder reading head of the magnetic ring encoder is disposed on the outer wall of the fixed column. The controller is connected to the liquid pump, control panel, fluid pressure gauge, fluid sensor one, electric cylinder, four-way solenoid valve, heater, fluid sensor two, electric push cylinder, rotary motor and magnetic ring encoder respectively via wires, and the connection method is electrical connection.
[0013] Compared with existing technologies, this invention achieves mechanical fixation of hard-seal gate valves by setting a fixing component in the performance testing device for hard-seal gate valves. The controller controls the operation of the electric cylinder, so that one end of the electric cylinder pushes the sliding base, causing the sliding base to move laterally on the outer wall of the limit guide rail. This causes the sliding base to move the connecting flange to one side, which in turn causes the connecting flange to drive the limit rod into the hard-seal gate valve for fixation. This fixes the hard-seal gate valve in place by the connecting flange and the fixing flange, thus solving the problems of manual fixation of hard-seal gate valves, which is time-consuming and laborious when dealing with large-scale testing, and the inaccurate installation can also lead to deviations in measurement results.
[0014] This invention enables the simulation of actual operating conditions of hard-seal gate valves by setting up test components in the performance testing device for hard-seal gate valves. Fluid is drawn from the storage tank by a pump and transported to a four-way solenoid valve through pipelines. The flow path is switched according to preset parameters, so that the fluid is divided into two paths. One path goes directly into the fixed base through the second diversion pipe, and the other path flows into the heater through the first diversion pipe for heating, and then flows back into the fixed base through the outlet pipe. This creates a thermal-fluid coupling test environment with alternating hot and cold fluids at the hard-seal gate valve. At the same time, fluid sensor one and fluid sensor two collect fluid data from both sides of the hard-seal gate valve in real time and feed it back to the controller. Finally, the data is displayed synchronously on the control panel. This solves the problem that existing test devices cannot fully simulate the interaction of multiple physical fields (such as thermal-fluid coupling), resulting in deviations between the test results and the actual operating conditions.
[0015] This invention enables the opening and closing of hard-seal gate valves during testing by incorporating a limit adjustment component in the performance testing device for hard-seal gate valves. This ensures the stability of test parameters. A controller coordinates the electric drive of components such as cylinders, rotary motors, and magnetic ring encoders to achieve automatic insertion, removal, clamping, and rotation control of the handwheel of the hard-seal gate valve. The cylinder drives the mounting frame to move longitudinally along the positioning guide rail, causing the guide rod and insertion / removal grippers to move downwards and fix the handwheel of the hard-seal gate valve. Subsequently, the rotary motor drives the grippers to rotate via the guide rod. Simultaneously, the magnetic ring encoder monitors displacement data in real time and feeds it back to the controller, forming a closed-loop adjustment system. This system adjusts the opening and closing angle of the hard-seal gate valve according to preset parameters, thus solving the problems of traditional hard-seal gate valve testing processes relying on manual operation and adjustment of the valve's opening and closing degree, which are prone to human error and inefficient. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a side view of the structure of the present invention; Figure 3 This is a schematic diagram of the device frame structure of the present invention; Figure 4 This is a schematic diagram of the limit adjustment component structure of the present invention; Figure 5 For the present invention Figure 2 Enlarged schematic diagram of the structure at point A; Figure 6 For the present invention Figure 2 Enlarged schematic diagram of the structure at point B; Figure 7 For the present invention Figure 2 Enlarged schematic diagram of the structure at point C; Figure 8 For the present invention Figure 4 A magnified schematic diagram of the structure at point D.
[0017] In the diagram: 1. Equipment frame; 2. Fluid storage tank; 3. Controller; 4. Control panel; 5. Fluid pressure gauge; 6. Fixing assembly; 601. Limiting guide rail; 602. Sliding base; 603. Fluid sensor one; 604. Connecting flange; 605. Limiting rod; 606. Electric cylinder; 7. Test assembly; 701. Mounting bracket; 702. Four-way solenoid valve; 703. Diverter pipe one; 704. Heater; 705. Diverter pipe two; 706. Fixing base; 70 7. Outlet pipe; 708. Fluid sensor II; 709. Fixed flange; 710. Hard-seal gate valve; 8. Limit adjustment assembly; 801. Mounting bracket; 802. Positioning guide rail; 803. Mounting frame; 804. Electrically controlled push cylinder; 805. Rotary motor; 806. Guide rod; 807. Insertion and removal gripper; 808. Mounting plate; 809. Fixed column; 810. Magnetic ring encoder; 9. Liquid pump; 10. Outlet pipe; 11. Connecting pipe; 12. Conduit; 13. Return pipe. Detailed Implementation
[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.
[0019] Example: Please refer to Figure 1-8 The device shown is a performance testing device for a hard-seal gate valve, including a device frame 1 and a fluid storage tank 2. A controller 3 is installed on the outer wall of the device frame 1, and a control panel 4 is installed on the outer wall of the device frame 1. A fluid pressure gauge 5 is installed on the outer wall of the equipment frame 1. A fixing component 6 is installed on the outer wall of the equipment frame 1. A testing component 7 is installed on the outer wall of the equipment frame 1. A limit adjustment component 8 is installed on the outer wall of the equipment frame 1. A fluid storage tank 2 is installed on the outer wall of the equipment frame 1. A pump 9 is installed on the outer wall of the fluid storage tank 2. An outlet pipe 10 is installed at the outlet of the pump 9. A connecting pipe 11 is installed at one end of the outlet pipe 10. The connecting pipe 11 is located on the outer wall of the fluid storage tank 2. A conduit 12 is installed at one end of the connecting pipe 11. A return pipe 13 is installed on the outer wall of the fluid storage tank 2.
[0020] In this embodiment, specific references Figure 1 , Figure 2 , Figure 3 and Figure 5The fixing component 6 includes a limiting guide rail 601, which is installed on the outer wall of the equipment frame 1. A sliding base 602 is slidably connected to the inner wall of the limiting guide rail 601. A fluid sensor 603 is provided on the outer wall of the sliding base 602, wherein the sensing end of the fluid sensor 603 extends into the inner cavity of the sliding base 602. A connecting flange 604 is installed on the outer wall of the sliding base 602, and a limiting rod 605 is provided on the outer wall of the connecting flange 604. An electric cylinder 606 is installed on the outer wall of the sliding base 602, wherein the electric cylinder 606 is located on the base surface of the equipment frame 1, and a return pipe 13 is connected to the electric cylinder 606 directly above and on the outer wall of the sliding base 602.
[0021] In this embodiment, specific references Figure 1 , Figure 2 , Figure 3 , Figure 5 , Figure 6 and Figure 7 The test component 7 includes a mounting bracket 701, which is mounted on the outer wall of the equipment frame 1. A four-way solenoid valve 702 is mounted on the outer wall of the mounting bracket 701. One end of the four-way solenoid valve 702 is connected to a conduit 12. A heater 704 is mounted on one end of the four-way solenoid valve 702 via a first diversion pipe 703. The heater 704 is mounted on the outer wall of the equipment frame 1. The other end of the four-way solenoid valve 702 is mounted on a fixed base 706 via a second diversion pipe 705. Installed on the base surface of the equipment frame 1, the heater 704 is connected to the fixed base 706 via the outlet pipe 707. A fluid sensor 708 is installed on the outer wall of the fixed base 706, wherein the sensing end of the fluid sensor 708 extends into the inner cavity of the fixed base 706. A fixed flange 709 is installed on the outer wall of the fixed base 706, and a hard-seal gate valve 710 is installed on the outer wall of the fixed flange 709, wherein one end of the hard-seal gate valve 710 is plugged into the outer wall of the connecting flange 604.
[0022] In this embodiment, specific references Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 8The limit adjustment component 8 includes a mounting frame 801, which is mounted on the outer wall of the equipment frame 1. A positioning guide rail 802 is mounted on the outer wall of the mounting frame 801. A mounting frame 803 is slidably connected to the outer wall of the positioning guide rail 802. An electrically controlled push cylinder 804 is mounted on the inner wall of the mounting frame 801, with one end of the electrically controlled push cylinder 804 connected to the mounting frame 803. A rotary motor 805 is mounted on the inner wall of the mounting frame 803, with a guide rod 806 mounted on one end of the rotary motor 805. The guide rod 806 is rotatably connected to the outer wall of the mounting frame 803. A plug-in gripper 807 is mounted on one end of the guide rod 806, and a handwheel of a hard-seal gate valve 710 is plugged into and plugged into one end of the plug-in gripper 807. A mounting plate 808 is mounted on the outer wall of the mounting frame 801, with a fixing column 809 mounted on the outer wall of the mounting plate 808. A magnetic ring encoder 810 is mounted on one end of the fixing column 809.
[0023] Based on the above structural features and connection relationships, one end of the electrically controlled cylinder 804 pulls the mounting frame 803 to move, causing the mounting frame 803 to move longitudinally downward on the outer wall of the positioning guide rail 802. This causes the mounting frame 803 to move downward via the rotary motor 805, which in turn causes one end of the guide rod 806 to move downward, thereby causing one end of the insertion and extraction gripper 807 to be inserted and extracted into the handwheel of the hard-seal gate valve 710. The insertion and extraction gripper 807 fixes the handwheel of the hard-seal gate valve 710. The encoder magnetic ring of the magnetic ring encoder 810 is mounted on the outer wall of the guide rod 806, and the encoder reading head of the magnetic ring encoder 810 is mounted on the outer wall of the fixed column 809. The controller 3 is electrically connected to the liquid pump 9, control panel 4, fluid pressure gauge 5, fluid sensor 1 603, electric cylinder 606, four-way solenoid valve 702, heater 704, fluid sensor 2 708, electric cylinder 804, rotary motor 805, and magnetic ring encoder 810, thereby energizing the device. This allows the controller 3 to control the operation of the liquid pump 9, control panel 4, fluid pressure gauge 5, fluid sensor 1 603, electric cylinder 606, four-way solenoid valve 702, heater 704, fluid sensor 2 708, electric cylinder 804, rotary motor 805, and magnetic ring encoder 810.
[0024] This solution is used for the performance testing device of hard-seal gate valves. During operation, one end of the hard-seal gate valve 710 is fixed by inserting it into the outer wall of the fixed flange 709. Turning on the controller 3 and setting the preset parameters causes the controller 3 to control the electric cylinder 606 to operate. One end of the electric cylinder 606 pushes the sliding base 602, causing the sliding base 602 to move laterally on the outer wall of the limit guide rail 601. This, in turn, causes the sliding base 602 to move the connecting flange 604 to one side, which in turn causes the connecting flange 604 to drive the limit rod 605 to insert into the hard-seal gate valve 710 for fixation. This allows the connecting flange 604 and the fixed flange 709 to secure the hard-seal gate valve 710, thus solving the problem of manual fixing of hard-seal gate valves, which is time-consuming and labor-intensive when dealing with large-scale testing, and where improper installation can lead to measurement deviations. By turning on the switch of controller 3, controller 3 controls the electrically controlled actuated cylinder 804 to operate, thereby causing one end of the electrically controlled actuated cylinder 804 to pull the mounting frame 803 to move. This causes the mounting frame 803 to move longitudinally downward on the outer wall of the positioning guide rail 802. Consequently, the mounting frame 803, via the rotary motor 805, drives the guide rod 806 to move downward, causing one end of the guide rod 806 to move the insertion / removal gripper 807 downward. This allows one end of the insertion / removal gripper 807 to be inserted into and removed from the handwheel of the hard-seal gate valve 710. After the insertion / removal gripper 807 fixes the handwheel of the hard-seal gate valve 710, the control... The controller 3 controls the rotary motor 805 to operate, which in turn causes the drive shaft of the rotary motor 805 to drive the insertion and removal gripper 807 to rotate via the guide rod 806. At the same time, the magnetic ring encoder 810 generates an electrical signal based on the rotational displacement data of the guide rod 806. The electrical signal generated by the magnetic ring encoder 810 is transmitted to the controller 3 through the wire, so that the controller 3 controls the rotary motor 805 to operate according to preset parameters, thereby adjusting the opening and closing conditions of the hard-seal gate valve 710. This solves the problem that the traditional hard-seal gate valve testing process relies on manual operation, and manually adjusting the opening and closing degree of the hard-seal gate valve is prone to human error and is inefficient. By turning on the switch of controller 3, controller 3 will control the pump 9 to operate, thereby causing pump 9 to extract fluid from the inner cavity of fluid storage tank 2. The fluid will then flow sequentially through pump 9, outlet pipe 10, connecting pipe 11, and conduit 12, entering the inner cavity of four-way solenoid valve 702 through conduit 12. Controller 3 controls the four-way solenoid valve 702 to operate according to preset parameters, causing it to open. This allows the fluid to flow through diversion pipe 2 705 into the inner cavity of fixed base 706, and then into hard-seal gate valve 710 for performance testing. Simultaneously, controller 3 causes the fluid to flow through diversion pipe 1 703 into heater 704, thereby stimulating the heater... Heater 704 heats the fluid, which then flows through outlet pipe 707 into fixed base 706. The fluid then flows into hard-seal gate valve 710 for performance testing, simulating the thermal-fluid coupling condition. Simultaneously, fluid sensor 603 and fluid sensor 708 detect the fluid on both sides of hard-seal gate valve 710. The electrical signals generated by fluid sensor 603 and fluid sensor 708 are transmitted to controller 3 via wires, causing controller 3 to control control panel 4 to display data for easy observation by operators. This solves the problem that existing testing devices cannot fully simulate the interaction of multiple physical fields (such as thermal-fluid coupling), leading to deviations between test results and actual operating conditions.
[0025] The pump 9, control panel 4, fluid pressure gauge 5, fluid sensor 1 603, electric cylinder 606, four-way solenoid valve 702, heater 704, fluid sensor 2 708, electric cylinder 804, rotary motor 805, magnetic ring encoder 810, and controller 3 used in this invention are all existing known electrical devices, and all can be directly purchased and used on the market. Their structure, circuit, and control principle are all existing known technologies. Therefore, the structure, circuit, and control principle of the pump 9, control panel 4, fluid pressure gauge 5, fluid sensor 1 603, electric cylinder 606, four-way solenoid valve 702, heater 704, fluid sensor 2 708, electric cylinder 804, rotary motor 805, magnetic ring encoder 810, and controller 3 will not be described in detail here.
[0026] All standard parts used in this application can be purchased from the market. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art and are also general components, which are common knowledge in this field.
[0027] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A performance testing device for hard-seal gate valves, comprising a device frame (1) and a fluid storage tank (2), characterized in that: A controller (3) is installed on the outer wall of the equipment frame (1), and a control panel (4) is installed on the outer wall of the equipment frame (1). A fluid pressure gauge (5) is installed on the outer wall of the equipment frame (1). A fixing component (6) is installed on the outer wall of the equipment frame (1). A testing component (7) is installed on the outer wall of the equipment frame (1). A limit adjustment component (8) is installed on the outer wall of the equipment frame (1). A fluid storage tank (2) is installed on the outer wall of the equipment frame (1). A pump (9) is installed on the outer wall of the fluid storage tank (2). An outlet pipe (10) is installed at the outlet of the pump (9). A connecting pipe (11) is installed at one end of the outlet pipe (10). The connecting pipe (11) is located on the outer wall of the fluid storage tank (2). A conduit (12) is installed at one end of the connecting pipe (11). A return pipe (13) is installed on the outer wall of the fluid storage tank (2).
2. The performance testing device for a hard-seal gate valve according to claim 1, characterized in that: The fixing component (6) includes a limiting guide rail (601), which is installed on the outer wall of the equipment frame (1). A sliding base (602) is slidably connected to the inner wall of the limiting guide rail (601). A fluid sensor (603) is provided on the outer wall of the sliding base (602), wherein the sensing end of the fluid sensor (603) extends into the inner cavity of the sliding base (602). A connecting flange (604) is installed on the outer wall of the sliding base (602), and a limiting rod (605) is provided on the outer wall of the connecting flange (604). An electric control cylinder (606) is installed on the outer wall of the sliding base (602), wherein the electric control cylinder (606) is located on the base surface of the equipment frame (1), and a return pipe (13) is connected to the electric control cylinder (606) directly above and on the outer wall of the sliding base (602).
3. The performance testing device for a hard-seal gate valve according to claim 2, characterized in that: The test assembly (7) includes a mounting bracket (701) which is mounted on the outer wall of the equipment frame (1). A four-way solenoid valve (702) is mounted on the outer wall of the mounting bracket (701). One end of the four-way solenoid valve (702) is connected to a conduit (12). A heater (704) is mounted on one end of the four-way solenoid valve (702) through a shunt pipe (703). The heater (704) is mounted on the outer wall of the equipment frame (1).
4. The performance testing device for a hard-seal gate valve according to claim 3, characterized in that: The other end of the four-way solenoid valve (702) is mounted on a fixed base (706) via a diversion pipe (705). The fixed base (706) is mounted on the base surface of the equipment frame (1). The heater (704) is connected to the fixed base (706) via an outlet pipe (707).
5. The performance testing device for a hard-seal gate valve according to claim 4, characterized in that: A fluid sensor 2 (708) is provided on the outer wall of the fixed base (706), wherein the sensing end of the fluid sensor 2 (708) extends into the inner cavity of the fixed base (706), a fixed flange (709) is installed on the outer wall of the fixed base (706), and a hard-seal gate valve (710) is installed on the outer wall of the fixed flange (709), wherein one end of the hard-seal gate valve (710) is plugged into and connected to the outer wall of the connecting flange (604).
6. The performance testing device for a hard-seal gate valve according to claim 5, characterized in that: The limit adjustment component (8) includes a mounting bracket (801), which is mounted on the outer wall of the equipment frame (1). A positioning guide rail (802) is mounted on the outer wall of the mounting bracket (801), and a mounting frame (803) is slidably connected to the outer wall of the positioning guide rail (802). An electrically controlled push cylinder (804) is mounted on the inner wall of the mounting bracket (801), wherein one end of the electrically controlled push cylinder (804) is connected to the mounting frame (803), and a rotary motor (805) is mounted on the inner wall of the mounting frame (803).
7. The performance testing device for a hard-seal gate valve according to claim 6, characterized in that: One end of the rotary motor (805) is equipped with a guide rod (806), which is rotatably connected to the outer wall of the mounting frame (803). One end of the guide rod (806) is equipped with a plug-in gripper (807), and one end of the plug-in gripper (807) is plugged into and connected to the handwheel of the hard-seal gate valve (710). An mounting plate (808) is mounted on the outer wall of the mounting bracket (801), and a fixing column (809) is mounted on the outer wall of the mounting plate (808). One end of the fixing column (809) is equipped with a magnetic ring encoder (810).
8. The performance testing device for a hard-seal gate valve according to claim 7, characterized in that: The encoder magnetic ring of the magnetic ring encoder (810) is set on the outer wall of the guide rod (806), and the encoder reading head of the magnetic ring encoder (810) is set on the outer wall of the fixed column (809). The controller (3) is connected to the liquid pump (9), control panel (4), fluid pressure gauge (5), fluid sensor one (603), electric cylinder (606), four-way solenoid valve (702), heater (704), fluid sensor two (708), electric push cylinder (804), rotary motor (805) and magnetic ring encoder (810) through wires, and the connection method is electrical connection.