Industrial plastic ball valve all-in-one testing machine

Abstract

The utility model discloses a kind of industrial plastic ball valve all-in-one testing machine, belong to testing machine technical field, comprising: portal frame, ball valve body is equipped between the two sides of the portal frame, testing assembly is equipped on the portal frame to carry out airtightness test of testing assembly, the top of the portal frame is equipped with rotating assembly, the below of the rotating assembly is equipped with clamping assembly by adjusting assembly.The equipment integrates airtightness test, fatigue (airtightness) test and torsion test three core functions, ball valve body only needs once clamping, can complete all test procedures, without staff carrying valve between multiple equipment, not only reduce manual operation amount, also avoid positioning error and valve damage caused by repeated clamping;While improving test efficiency, and the equipment is integrated by test assembly, rotating assembly, adjusting assembly and clamping assembly, save factory space.

Description

Technical Field

[0001] This utility model relates to an all-in-one testing machine for industrial plastic ball valves, belonging to the technical field of testing machines. Background Technology

[0002] Industrial plastic ball valves are key control components in industrial fluid systems. Their core function is the same as that of metal ball valves, which achieve fluid on / off or flow regulation through the rotation of the ball. However, due to their excellent corrosion resistance and adaptability to low-pressure conditions, they are widely used in fields such as chemical, electronic, and food processing where the purity of the medium or the corrosion resistance of the equipment is required. A typical example is the plastic ball valve made of polyvinylidene fluoride.

[0003] Because industrial plastic ball valves directly affect the operational safety and stability of fluid systems, they must pass three key quality tests before leaving the factory. These three tests have clearly defined functions: First, the airtightness test, which checks the initial sealing performance of the valve to ensure no media leakage when the valve is closed, forming the basis for leak-free system operation; second, the fatigue (airtightness) test, which simulates repeated opening and closing actions during long-term use to verify that the valve can maintain a reliable seal after multiple operations, preventing seal failure after prolonged use; and third, the torque test, which checks the maximum operating torque when the valve is opened and closed to ensure that the torque value meets design standards. Excessive torque can make operation difficult for personnel, while insufficient torque may lead to safety hazards due to insufficient structural strength. These three tests together constitute the core quality barrier for plastic ball valves before they leave the factory.

[0004] However, existing ball valve testing equipment on the market generally suffers from a single-function limitation: airtightness testing requires a dedicated airtightness testing machine, fatigue testing requires transfer to a fatigue testing machine, and torque testing requires further transfer to a torque testing machine. This decentralized testing model presents multiple problems: First, the ball valves need to be moved multiple times during the testing process, which not only increases manual operation steps and labor intensity but may also damage the flange sealing surface of the ball valves due to collisions and vibrations during handling, affecting test accuracy; second, multiple clamping and positioning significantly prolong the single test cycle, affecting testing efficiency; finally, three independent devices each require separate factory space, thus occupying usable space. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides an all-in-one testing machine for industrial plastic ball valves.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] An industrial plastic ball valve multi-function testing machine includes: a gantry frame, a ball valve body disposed between the two sides of the gantry frame, a testing component for airtightness testing of the testing component disposed on the gantry frame, a rotating component disposed on the top of the gantry frame, a clamping component disposed below the rotating component via an adjusting component, and a PLC controller disposed on one side of the gantry frame.

[0008] Preferably, the test assembly includes two electric push rods, which are respectively installed on the lower inner walls of both sides of the gantry frame. One electric push rod has a clamp plate installed at its output end, and the other electric push rod has a U-shaped plate installed at its output end. A circular box is installed on one side of the U-shaped plate, and an air pump is installed on one side of the circular box through an air valve. An air outlet and a pressure sensor are provided on the other side of the circular box.

[0009] Preferably, the rotating assembly includes an electric cylinder, which is mounted on the top of the gantry frame. A torque motor is mounted on the output end of the electric cylinder via a motor frame, and the output end of the torque motor is fixedly mounted on the top side of the rotating plate via a torque sensor.

[0010] Preferably, the adjustment assembly includes a through groove, which is located on the side of the rotating plate away from the torque sensor. A lead screw is rotatably mounted in the through groove, and a T-block is provided on the outer wall of the lead screw via a thread.

[0011] Preferably, the clamping assembly includes a bottom groove, which is formed at the bottom of the T-shaped block. A screw is rotatably installed in the bottom groove, and both ends of the screw have movable plates threaded onto their outer side walls.

[0012] Preferably, wear-resistant plates are detachably mounted on the underside of the two movable plates at their respective ends by bolts.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. The equipment integrates three core functions: airtightness testing, fatigue (airtightness) testing, and torque testing. The ball valve body only needs to be clamped once to complete the entire testing process. There is no need for staff to move the valve between multiple devices, which not only reduces the amount of manual operation, but also avoids positioning errors and valve damage caused by repeated clamping. At the same time, it improves testing efficiency. Moreover, by integrating the testing components, rotating components, adjusting components, and clamping components into one unit, the footprint of a single device is only one-third of the total footprint of traditional three sets of equipment, saving factory space.

[0015] 2. The electric actuator extends the clamping plate and the cylindrical box to clamp the flanges on both sides of the ball valve body, simultaneously sealing the ball valve body. Next, the valve of the ball valve body is closed, and the air pump is started to fill the ball valve body with compressed air through the outlet. Then, the inlet valve is closed and the pressure is maintained for 5-10 minutes. The air pressure inside the ball valve body is detected using a pressure sensor, thus completing the airtightness test of the ball valve body. After the airtightness test is completed, the electric cylinder drives the torque motor to descend, causing the moving plate to descend to both ends of the valve stem handle position at the top of the ball valve body. Depending on the handle length, the screw is rotated to move the T-block, allowing the moving plate to move to the side of the handle away from the valve stem. Then, the screw is rotated to bring the two moving plates closer together, clamping and fixing the handle of the ball valve body. Subsequently, the torque motor rotates forward and backward once, fully opening and then fully closing the valve body. The maximum torque when the valve is open and closed is calculated using a torque sensor to ensure that the operating force meets the design requirements and avoids excessively tight or loose operation. Finally, the valve body is subjected to a fatigue test by rotating the rotating plate a certain number of times in both directions. After the valve has been opened and closed a specified number of times, the above airtightness test steps are repeated. If the test results show no significant decrease in sealing performance, the ball valve body is deemed to have passed the test, and the three tests are completed. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, 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 the structures shown in these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the left-side structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the right-side structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the adjustment component structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the clamping component structure of this utility model.

[0021] In the diagram: 1. Gantry frame; 2. Ball valve body; 3. Test assembly; 4. Rotation assembly; 5. Adjustment assembly; 6. Clamping assembly; 7. PLC controller; 301. Electric push rod; 302. Clamping plate; 303. U-shaped plate; 304. Round box; 305. Air pump; 306. Air outlet; 307. Pressure sensor; 401. Electric cylinder; 402. Torque motor; 403. Torque sensor; 404. Rotating plate; 501. Through groove; 502. Lead screw; 503. T-block; 601. Bottom groove; 602. Screw; 603. Moving plate; 604. Wear-resistant plate. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figures 1-2 This utility model provides a technical solution:

[0024] An industrial plastic ball valve multi-function testing machine includes: a gantry frame 1, a ball valve body 2 between the two sides of the gantry frame 1, a test component 3 for airtightness testing of the test component 3 on the gantry frame 1, a rotating component 4 on the top of the gantry frame 1, a clamping component 6 below the rotating component 4 via an adjusting component 5, and a PLC controller 7 on one side of the gantry frame 1.

[0025] Furthermore, the PLC controller model 7 is the Delta DVP-EH3 series.

[0026] Please see Figure 2 In this embodiment: the test assembly 3 includes two electric push rods 301, which are respectively installed on the lower inner walls of the two sides of the gantry frame 1. A clamping plate 302 is installed at the output end of one electric push rod 301, and a U-shaped plate 303 is installed at the output end of the other electric push rod 301. A circular box 304 is installed on one side of the U-shaped plate 303. An air pump 305 is installed on one side of the circular box 304 through an air valve. An air outlet 306 and a pressure sensor 307 are provided on the other side of the circular box 304.

[0027] Furthermore, an elastic sealing gasket is pasted on the side of the clamping plate 302 facing the flange of the ball valve body 2. The sealing gasket is made of nitrile rubber and can fit tightly against the flange end face when clamped, avoiding air tightness test errors caused by minor defects on the flange surface. The round box 304 is equipped with a pressure stabilizing chamber, which can buffer the air pressure fluctuations output by the air pump 305 and ensure that the air pressure filled into the ball valve body 2 is stable at the set value. The detection accuracy of the pressure sensor (307) can reach ±0.001MPa, and the data can be transmitted to the PLC controller 7 in real time. When the air pressure drops beyond the preset threshold, the equipment will automatically alarm and mark it as air tightness unqualified.

[0028] Please see Figure 2 In this embodiment: the rotating assembly 4 includes an electric cylinder 401, which is mounted on the top of the gantry 1. The output end of the electric cylinder 401 is mounted with a torque motor 402 via a motor frame. The output end of the torque motor 402 is fixedly mounted via a torque sensor 403 and the top side of the rotating plate 404.

[0029] Furthermore, the electric cylinder 401 is a servo electric cylinder, which can precisely adjust the height of the torque motor 402 and the subsequent clamping assembly 6. The torque motor 402 has an adjustable speed function, and different opening and closing speeds can be set according to the ball valve model to simulate the operating rhythm in actual use. The torque sensor 403 has a measurement range of 0-50 N·m and a data sampling frequency of 100 Hz. It can capture the instantaneous maximum torque during the valve opening and closing process and display the real-time torque curve on the PLC controller 7, which is convenient for staff to trace the test data.

[0030] Please see Figure 3 In this embodiment: the adjustment component 5 includes a through groove 501, which is opened on the side of the rotating plate 404 away from the torque sensor 403. A lead screw 502 is rotatably installed in the through groove 501, and a T-block 503 is provided on the outer side wall of the lead screw 502 by means of threads.

[0031] Furthermore, the lead screw 502 adopts a ball screw structure and its surface is chrome-plated to reduce wear during long-term use; the inner wall of the through groove 501 is provided with two parallel guide grooves, and the T-block 503 is provided with sliders on both sides that match the guide grooves, which can limit the T-block 503 to move only along the axial direction of the lead screw 502 and avoid rotational deviation; a handwheel is installed at one end of the lead screw 502, and the surface of the handwheel is provided with anti-slip texture.

[0032] Please see Figure 4 In this embodiment: the clamping assembly 6 includes a bottom groove 601, which is opened at the bottom of the T-shaped block 503. A screw 602 is rotatably installed in the bottom groove 601. The outer walls of both ends of the screw 602 are provided with movable plates 603 by threads.

[0033] Furthermore, a handwheel is installed at one end of the screw 602, and the threads at both ends of the screw 602 are reverse trapezoidal threads. When the screw 602 rotates clockwise, the two moving plates 603 move towards the center simultaneously, and when it rotates counterclockwise, they move away from each other simultaneously, ensuring that the handle is always in the center position of the two moving plates 603 when clamping.

[0034] Please see Figure 4 In this embodiment: wear-resistant plates 604 are detachably installed on the underside of the two movable plates 603 that are close to each other at one end by bolts.

[0035] Furthermore, the wear-resistant plate 604 is made of high-density polyethylene, which not only has a low wear resistance coefficient but also has a certain degree of elasticity. This reduces scratches on the surface of the tool holder when the handle is clamped and rotated. The wear-resistant plate 604 can be easily replaced with bolts.

[0036] The workflow of this embodiment is as follows: The electric push rod 301 drives the clamping plate 302 and the round box 304 to extend and clamp the flanges on both sides of the ball valve body 2, while simultaneously sealing the ball valve body 2. Then, the valve of the ball valve body 2 is closed, and the air pump 305 is started to fill the ball valve body 2 with compressed air through the air outlet 306. Subsequently, the air inlet valve is closed and the pressure is maintained for 5-10 minutes. The air pressure inside the ball valve body 2 can be detected by the pressure sensor 307 to detect the airtightness of the ball valve body 2. Then, the electric cylinder 401 drives the torque motor 402 to descend, causing the two 606s to descend to the two ends of the valve stem handle position at the top of the ball valve body 2. According to the handle length, the lead screw 502 is rotated. Move the T-block 503 to move the moving plate 603 to the side of the handle away from the valve stem. Then rotate the screw 602 to bring the two moving plates 603 closer together to clamp and fix the handle of the ball valve body 2. Then, the torque motor 402 rotates forward and backward once to fully open and then fully close the valve of the ball valve body 2. The torque sensor 403 calculates the maximum torque when opening and the maximum torque when closing to ensure that the operating force meets the design requirements and avoids being too tight or too loose. Finally, rotate the rotating plate 404 forward and backward a certain number of times to perform a fatigue test on the valve of the ball valve body 2. After opening and closing a certain number of times, perform the above-mentioned air tightness test again. If there is no significant decrease in sealing performance, it is considered to have passed.

[0037] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-functional testing machine for industrial plastic ball valves, characterized in that, include: A gantry frame (1) is provided with a ball valve body (2) between its two sides. A test assembly (3) for airtightness testing of a test assembly (3) is provided on the gantry frame (1). A rotating assembly (4) is provided on the top of the gantry frame (1). A clamping assembly (6) is provided below the rotating assembly (4) via an adjustment assembly (5). A PLC controller (7) is provided on one side of the gantry frame (1).

2. The multi-functional testing machine for industrial plastic ball valves according to claim 1, characterized in that, The test assembly (3) includes two electric push rods (301), which are respectively installed on the lower inner walls of the two sides of the gantry frame (1). One electric push rod (301) has a clamp plate (302) installed at its output end, and the other electric push rod (301) has a U-shaped plate (303) installed at its output end. A round box (304) is installed on one side of the U-shaped plate (303). An air pump (305) is installed on one side of the round box (304) through an air valve. An air outlet (306) and a pressure sensor (307) are provided on the other side of the round box (304).

3. The multi-functional testing machine for industrial plastic ball valves according to claim 1, characterized in that, The rotating assembly (4) includes an electric cylinder (401), which is mounted on the top of the gantry (1). The output end of the electric cylinder (401) is equipped with a torque motor (402) via a motor frame. The output end of the torque motor (402) is fixedly mounted on one side of the top of the torque sensor (403) and the rotating plate (404).

4. The multi-functional testing machine for industrial plastic ball valves according to claim 3, characterized in that, The adjustment assembly (5) includes a through groove (501), which is located on the side of the rotating plate (404) away from the torque sensor (403). A lead screw (502) is rotatably installed in the through groove (501), and a T-block (503) is provided on the outer side wall of the lead screw (502) by means of a thread.

5. The multi-functional testing machine for industrial plastic ball valves according to claim 4, characterized in that, The clamping assembly (6) includes a bottom groove (601) which is opened at the bottom of the T-block (503). A screw (602) is rotatably installed in the bottom groove (601). The outer walls of both ends of the screw (602) are provided with movable plates (603) by threads.

6. The multi-functional testing machine for industrial plastic ball valves according to claim 5, characterized in that, Wear-resistant plates (604) are detachably mounted on the underside of the two movable plates (603) at one end close to each other by bolts.

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