Valve ball and valve seat tightness testing system

Abstract

The invention relates to a valve ball and valve seat tightness testing system, and the system comprises a testing platform which is used for bearing a to-be-tested valve ball and valve seat; the conveying device is used for conveying the valve balls and the valve seats to different stations; the light source device is used for irradiating the bottom of the valve ball valve seat; the sensing device is positioned above the test platform and is used for sensing the illumination intensity above the valve ball valve seat; the measurement and control host is used for acquiring the illumination intensity measured by the sensing device and analyzing and processing the illumination intensity; when the illumination intensity is smaller than a preset value, the tightness of the valve ball and valve seat to be detected is judged to be qualified; and when the illumination intensity is greater than or equal to the preset value, judging that the sealing degree of the valve ball and valve seat to be detected is unqualified. The testing cost in the prior art is reduced, the testing efficiency is improved, the device can be applied to an on-line production system of an oil well pump automatic production line in a matched mode to control testing, and the product quality of the rod type oil well pump and the oil extraction efficiency of an oil field are improved; and advanced production of oil extraction equipment is promoted.

Description

Technical Field

[0001] This application relates to the technical field of testing devices for oil production equipment components, and in particular to a valve ball seat sealing test system. Background Technology

[0002] With the rapid development of society, the demand for oil from all walks of life is increasing. At present, rod-type oil pumps are the most widely used oil production equipment in oilfields due to their advantages of high oil production efficiency and low cost, especially suitable for the needs of deep-sea oil production.

[0003] Due to the high demand for oil across various industries, improving the product quality of rod-type oil pumps is crucial for oil production and efficiency, especially the sealing performance of the valve ball and seat clearance within the pump. Figures 11-12 As shown, this relates to the oil extraction efficiency and service life of the rod-type oil pump; therefore, how to quickly test the product quality of the valve ball and valve seat assembly of the rod-type oil pump is the key to improving the product quality and oil extraction efficiency of the rod-type oil pump.

[0004] Currently, there are several methods for testing the sealing performance of the valve ball and seat clearance: 1. Manual measurement of ball diameter and orifice diameter: This method involves manually measuring the diameter error of the valve ball and the orifice diameter of the valve seat using measuring tools to determine the product quality and sealing performance of the valve ball and seat clearance. This method is simple, convenient, and intuitive; however, it is slow, has low accuracy, and is prone to missing tests. 2. Hydraulic leak detection method: This method uses a test oil pump body. The valve ball and seat assembly is installed in the test oil pump body and connected to the hydraulic system. The pressure drop of the oil pump is tested to determine the sealing performance of the clearance between the valve ball and seat, thereby determining the sealing performance and product quality. This test method has high accuracy and precision; however, because each test requires disassembling and reinstalling the test oil pump, and the hydraulic oil needs to be cleaned after the test, the test speed is very slow and the test efficiency is low. Summary of the Invention

[0005] To address the aforementioned technical problems, the present invention aims to provide a valve ball and valve seat sealing test system that can quickly and accurately test the sealing performance of the valve ball and valve seat mating clearance.

[0006] A valve ball seat sealing performance testing system includes: a testing platform for supporting the valve ball seat to be tested; a transmission device for transmitting the valve ball seat to different workstations; a light source device for illuminating the bottom of the valve ball seat; a sensing device located above the testing platform for sensing the light intensity above the valve ball seat; and a measurement and control host for acquiring and analyzing the light intensity measured by the sensing device. When the light intensity is less than a preset value, the sealing performance of the valve ball seat under test is determined to be qualified; when the light intensity is greater than or equal to the preset value, the sealing performance of the valve ball seat under test is determined to be unqualified.

[0007] Furthermore, the testing platform of the present invention is provided with a test input position, a test position, a test position, a sorting position, a qualified product position, and a qualified product output position. The test position is provided with a central hole, the diameter of which is smaller than the diameter of the valve seat. The ball valve seat of the test valve is placed on the central hole, and the light source device illuminates the bottom of the ball valve seat of the test valve from below through the central hole. The sensing device is located above the test position.

[0008] Furthermore, the test platform of the present invention is covered with an upper casing, which is used to seal the test area into a dark environment; the upper casing is provided with a test sample input port and a qualified product output port on both sides respectively; the test sample input port is located between the test sample input position and the test position, and a light-blocking curtain A is provided on the test sample input port; the qualified product output port is located between the qualified product position and the qualified product output position, and a light-blocking curtain B is provided on the qualified product output port.

[0009] Furthermore, the conveying device of the present invention includes a conveying track, a track opening, an electric push rod, a stepper motor A, a transmission cover (11), a rack (30), and a transmission gear A (31). The conveying track (801) is a rectangular groove structure with a track opening (802) in the bottom wall. A rack (30) is installed on the upper side of the track opening (802). The stepper motor A (10) is movably installed on the rack (30). A transmission gear A (31) is installed on the right side of the stepper motor A (10) and meshes with the rack (30). An electric push rod (9) is connected below the stepper motor A (10). A transmission cover (11) is installed below the electric push rod (9). The transmission cover (11) is cylindrical and is used to cover the valve ball (37) and valve seat (36) as they move with the electric push rod (9).

[0010] Furthermore, the electric push rod (9) of the present invention is provided with a position sensing head (901), and each work station is provided with a proximity switch. When the electric push rod (9) moves to the corresponding work station, the proximity switch is used to sense the approaching position sensing head (901) and send the information to the measurement and control host (7).

[0011] Furthermore, the sensing device of the present invention includes multiple sets of telescopic rods, the upper end of which is installed on the upper chassis, and the lower end is provided with a light intensity sensor. The light intensity sensor is used to sense the light leaking from the bottom of the valve ball seat after the light source illuminates it, and sends the light intensity value information to the measurement and control host (7).

[0012] Furthermore, the present invention provides a defective product collection device (26) at the grade separation point (402) for collecting defective valve balls and seats; the defective product collection device (26) includes a frame (261), a movable door (262), a magnetic block (2621), a return spring (263), an adjusting bracket (264), an adjusting bolt (265), a spring shaft (266), a door hinge (267), and an electromagnet (268); the frame (261) is provided around the movable door (262); the movable door (262) is installed in the left middle part of the frame (261); inside the frame (261) A reset spring (263) is installed under the movable door (262); an adjustment bracket (264) is installed on the inner side of the right wall of the frame (261) under the reset spring (263); the adjustment bracket (264) is movably and adjustablely connected to the reset spring (263); the reset spring (263) elastically supports the movable door (262); the defective product leakage device (26) is used to execute the command of the measurement and control host (7) to the electromagnet (268), control the movable door (262), and let the unqualified valve ball (37) and valve seat (36) kits leak into the defective product box (29) when passing through the movable door (262).

[0013] Furthermore, the present invention provides an input device (38) at the test input position (301), the input device (38) including a stepper motor C (381), a push fork (382), a screw shaft (383), and an input frame (384); the input frame (384) is installed below the test platform, the test platform is provided with a push fork groove (303), the screw shaft (383) is installed on the input frame (384), the stepper motor C (381) is installed on the screw shaft (383), the push fork (382) is installed on the stepper motor C (381), the push fork (382) passes through the push fork groove (303) and is used to push the test valve ball seat from the test input position (301) to the test position (302).

[0014] Furthermore, the measurement and control host (7) of the present invention includes a control box (71), in which a single-chip microcomputer controller (72) and a power supply (73) are installed, and a control panel (74) is installed on the front of the control box (71); the control panel (74) includes a digital tube display module A (741) for displaying the pass rate, a digital tube display module B (742) for displaying the number of passes, a digital tube display module C (743) for displaying the total number of measurements, a digital tube display module D (744) for displaying the illuminance, a power switch (745), a test start button (746), a test pause button (747), and a test stop button (748).

[0015] The beneficial effects of this invention are: it allows for quick and convenient testing of the ball valve seat, accurate testing, high testing efficiency, and good testing specifications, standards, and uniformity; it reduces the testing costs of existing technologies, improves testing efficiency, and can also be applied to the online production system of automated oil pump production lines for control testing, thereby improving the product quality of rod-type oil pumps and oilfield production efficiency; and it promotes the advanced production of oil production equipment. Attached Figure Description

[0016] Figure 1 This is a structural diagram of the present invention.

[0017] Figure 2 for Figure 1 A sectional view along the AA direction.

[0018] Figure 3 for Figure 1 BB-direction sectional view.

[0019] Figure 4 for Figure 1 CC-direction sectional view.

[0020] Figure 5 This is a structural diagram of the device that produces defective products.

[0021] Figure 6 for Figure 7 DD section view.

[0022] Figure 7 This is the structure of a return spring.

[0023] Figure 8 This is a diagram showing the structure and control interface of the measurement and control host.

[0024] Figure 9 This is a block diagram illustrating the principle of the test control system of the present invention.

[0025] Figure 10 This is a schematic diagram showing the light leakage and non-light leakage aspects of the present invention.

[0026] Figure 11 Photo of a ball valve seat kit.

[0027] Figure 12 This is a schematic diagram of the clearance between the ball valve seat and the valve body. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0029] In the description of this embodiment, it should be understood that the valve ball 37 and the valve seat 36 are... Figure 11The pattern shown refers to the valve ball 37 and valve seat 36 assembly, specifically the test piece. A key performance indicator for testing this assembly is the sealing performance of the clearance between the valve ball 37 and valve seat 36. The light intensity index of the clearance leakage is indirectly equivalent to the clearance sealing performance index. A perfect, qualified test condition should look like this: Figure 10 The state of no light leakage is considered acceptable, while the unacceptable state is considered unacceptable. Figure 10 The light leakage state in the middle.

[0030] This embodiment discloses a valve ball seat sealing test system, including: The test platform is used to support the ball valve seat of the valve under test. A transmission device is used to transfer the valve ball and valve seat to different workstations; A light source device for illuminating the bottom of the valve ball seat; The sensing device, located above the test platform, is used to sense the light intensity above the ball valve seat. The measurement and control host (7) is used to acquire the light intensity measured by the sensing device and perform analysis and processing; when the light intensity is less than the preset value, it is determined that the sealing degree of the ball valve seat of the valve under test is qualified; when the light intensity is greater than or equal to the preset value, it is determined that the sealing degree of the ball valve seat of the valve under test is unqualified.

[0031] For details, see Figures 1-11 The test platform includes a balance base plate 2, which is a rectangular thick plate with four adjustment feet 1 installed on the bottom. A left chassis 3, a middle chassis 5, and a right chassis 4 of the same height are installed on the balance base plate 2. An upper chassis 6 is installed on top of the left chassis 3, the middle chassis 5, and the right chassis 4. A conveying device 8 is installed in the upper port of the upper chassis 6, and a measurement and control host 7 is installed on the side. A light shield 39 is installed on the top of the conveying device 8 and the chassis 6.

[0032] The upper chassis 6, left chassis 3, right chassis 4, middle chassis 5, and light shield 39 are made of opaque material, preferably stainless steel, with a minimum thickness of 0.5mm; furthermore, the entire casing is equipped with a light-shielding velvet cover for use in environments without strong light or vibration.

[0033] The testing platform is equipped with a test input position 301, a test position, a test position, a sorting position, a qualified product position, and a qualified product output position. The test position is provided with a central hole 28, the diameter of which is smaller than the diameter of the valve seat. The light source device illuminates the bottom of the test valve ball seat from below through the central hole 28. The sensing device is located above the test position.

[0034] The input position 301, the test position, the test position, the product sorting position, the qualified product position, and the qualified product output position refer to the positions where the valve ball 37 and valve seat 36 assembly stops during the testing process.

[0035] join Figures 1-4 The upper casing 6 is a square frame structure composed of four walls on the front, back, left, and right sides. The lower middle part of the left wall is provided with a sample input port 601, and the lower middle part of the right wall is provided with a qualified product output port 602. A counter A22 and a light-blocking curtain A23 are provided at the sample input port 601. A counter B24 and a light-blocking curtain B25 are provided at the qualified product output port 602. The inner side of the front or rear wall of the upper casing 6 is equipped with proximity switches A18, Aa19, B12, Bb13, C20, Cc21, D40, and Dd41.

[0036] The light-blocking curtains A23 and B25 are made of several light-blocking strips connected in parallel and hung down. They are used to block ambient light outside the sample input port 601 and the qualified product output port 602, and can facilitate the passage of the sample and qualified product.

[0037] The conveying device 8 includes a conveying track 801, a track opening 802, an electric push rod 9, a stepper motor A10, a transmission cover 11, a rack 30, and a transmission gear A31. The conveying track 801 has a rectangular groove structure with a track opening 802 in its bottom wall. A rack 30 is installed on the upper side of the track opening 802. The stepper motor A10 is movably mounted on the rack 30. A transmission gear A31 is installed on the right side of the stepper motor A10 and meshes with the rack 30. The electric push rod 9 is connected below the stepper motor A10. A transmission cover 11 is installed under the electric push rod 9. The transmission cover 11 is cylindrical and is used to cover the valve ball 37 and valve seat 36 as they move with the electric push rod 9. The electric push rod 9 and the transmission cover 11 move with the stepper motor A10, which moves according to the instructions of the control host 7. A position sensing head 901 is provided on the middle left side of the electric push rod 9. It is used to sense the moving position of the electric push rod 9 in conjunction with proximity switches Aa19, Bb13, Cc21, and Dd41.

[0038] In this embodiment, the sensing device includes multiple sets of telescopic rods. The upper end of the telescopic rod is installed on the upper housing 6, and the lower end is equipped with a light intensity sensor. The light intensity sensor is used to sense the light leaking from the bottom of the ball valve seat after being illuminated by a light source, and sends the light intensity value information to the monitoring and control host 7. Specifically, adjustable telescopic rods C15, B17, E34, and D35 are installed at the lower end of the conveyor track 801. Light intensity sensor A14 is installed under the adjustable telescopic rod C15, light intensity sensor B16 is installed under the adjustable telescopic rod B17, light intensity sensor C32 is installed under the adjustable telescopic rod E34, and light intensity sensor D33 is installed under the adjustable telescopic rod D35.

[0039] The left chassis 3 includes a test input position 301, a test position 302, and an input push fork groove 303; the left chassis 3 is a six-walled square cabinet, including a test input position 301, a test position 302, and an input push fork groove 303; the test input position 301 is located on the upper left side of the upper wall of the left chassis 3, and the test position 302 is located on the upper right side of the upper wall of the left chassis 3; the test input position 303 is located between the test input position 301 and the test position 302 on the upper wall of the left chassis 3; an input device 38 is installed in the upper wall of the left chassis 3 at the position corresponding to the test input position 301 and the test position 302.

[0040] The input device 38 includes a stepper motor C381, an input push fork 382, ​​a spiral shaft 383, and an input frame 384. The spiral shaft 383 is provided in the input frame 384, and the stepper motor C381 is movably mounted on the spiral shaft 383. The input push fork 382 is mounted on the stepper motor C381. The stepper motor C381 can move left and right on the spiral shaft 383. Under the action of the stepper motor C381, the input push fork 382 can move the test sample from the test sample input position 301 to the test position 302.

[0041] The upper center of the chassis 5 is provided with a test position 501. A test rotation mechanism 28 is installed at the test position 501. The test position 501 is provided with a central hole 28. The diameter of the central hole 28 is smaller than the diameter of the valve seat. The light source device 27 illuminates the bottom of the valve ball seat under test from below through the central hole 28.

[0042] See Figure 1 , Figures 4-7 A defective product leakage device 26 is provided at grade 402 to collect valve balls and valve seats that fail the test. The defective product leakage device 26 includes a frame 261, a movable door 262, a magnetic block 2621, a return spring 263, an adjusting frame 264, an adjusting bolt 265, a spring shaft 266, a door shaft 267, and an electromagnet 268. The frame 261 is provided around the movable door 262.

[0043] The movable door 262 is installed in the left middle part of the frame 261; a return spring 263 is installed inside the frame 261 and below the movable door 262; an adjustment frame 264 is installed on the inner side of the right wall of the frame 261 and below the return spring 263; the adjustment frame 264 and the return spring 263 are movably and adjustablely connected; the return spring 263 elastically supports the movable door 262.

[0044] The defective product leakage device 26 is used to execute the instructions of the monitoring and control host 7 to the electromagnet 268, control the movable door 262, and let the unqualified valve ball 37 and valve seat 36 kits leak into the defective product box 29 when passing through the movable door 262.

[0045] Spring shaft 266 is inserted into spring coil 2635 of return spring 263, and both ends are movably connected to the inner wall of frame 261; the two mounting rings 2637 and adjusting bolt 265 are installed in adjusting arc hole 2641 of adjusting frame 264, and adjusting the position of mounting ring 2637 in adjusting arc hole 2641 can adjust the contact elasticity between miniature bearing 2632 on support rod 2631 and movable door 262.

[0046] The frame 261 is a square frame with a panel structure at the top. A semi-circular door hole is provided on the top panel for mounting the movable door 262. An adjustment bracket 264 is installed on the left inner side wall of the frame 261 and connected to a return spring 263. An electromagnet 268 is installed on the right inner side wall of the frame 261, which corresponds to the reset position of the magnetic block 2621 at the right end of the movable door 262.

[0047] The movable door 262 is a semi-circular plate structure. The left end is provided with a door shaft hole for connecting the door shaft 267 to the frame 261, and the right end is provided with a magnetic block 2621.

[0048] The adjustment frame 264 is made of a rectangular plate with an arc-shaped notch at the upper right corner. An adjustment arc hole 2641 is provided near the edge of the arc-shaped notch. The adjustment arc hole 2641 is used to adjust the return elasticity of the return spring 263 to the movable door 262.

[0049] The return spring 263 comprises a support rod 2631, miniature bearings 2632, a bow rod 2633, a spring rod 2634, spring coils 2635, a spring adjustment rod 2636, and mounting rings 2637. The two mounting rings 2637 are respectively connected to the spring adjustment rod 2636. The spring adjustment rod 2636 is respectively connected to two sets of spring coils 2635, spring rods 2634, and bow rods 2633, and is closedly connected to the support rod 2631. Two miniature bearings 2632 are evenly distributed and strung within the support rod 2631. The return spring 263 is used for the reset of the movable door 262.

[0050] See Figures 8-9 In this embodiment, the measurement and control host 7 includes a control box 71, a microcontroller 72, a 24VDC power supply 73, and a control panel 74. The control box 71 contains the microcontroller 72 and the 24VDC power supply 73, and the control panel 74 is located on the front of the control box 71. The control panel 74 includes a digital tube display module A741 for displaying the pass rate, a digital tube display module B742 for displaying the number of passes, a digital tube display module C743 for displaying the total number of measurements, a digital tube display module D744 for displaying the illuminance, a power switch 745, a test start button 746, a test pause button 747, and a test stop button 748.

[0051] exist Figure 9The test control system of this invention includes a microcontroller controller, digital tube display module A, digital tube display module B, digital tube display module C, digital tube display module D, a button module, proximity switches A, B, C, Aa, Bb, and Cc, counter A, counter B, electric push rod, stepper motor A, conveying device, stepper motor B, stepper motor C, input device 38, test rotation mechanism, electromagnet, defective product leakage device, illuminance sensor A, illuminance sensor B, illuminance sensor C, and illuminance sensor D, a 24VCD power supply, and a 220VAC power supply. The microcontroller controller includes a CPU, a network module, a 5VDC converter, an A / D input module, a thyristor output module, a MAX232 module, a ROM memory, and a ROM memory. The microcontroller controller is programmed with... Figure 8-9 The display interface and hardware-related control and testing programs are used to test the sealing performance between the oil pump valve ball and valve seat.

[0052] The working principle of this embodiment is as follows: (1) Connect the 380V AC power supply and press the power switch 745 of the point measurement and control host 7. At this time, the digital tube display modules A741, B742, C743 and D744 will all light up and display "0".

[0053] (2) Input the valve ball 37 and valve seat 36 kit at the test input position 301 of the left chassis 3. At this time, the counter A22 counts the test items and sends the test item count information to the CPU through the A / D input module. The CPU analyzes and processes the data and sends an instruction to the digital tube display module C to display the total number of tests.

[0054] (3) Press the test start button 746 on the test and control host 7, and the CPU will send an instruction to the thyristor output module to control the stepper motor C381 of the input device 38 to work and move the valve ball 37 and valve seat 36 assembly of the input position 301 of the test item to the test position 302. At this time, proximity switch A18 senses the information of the test object and sends the information to the CPU through the A / D input module. The CPU analyzes and processes the information and sends an instruction to the thyristor output module to control the stepper motor A10 of the transmission device 8 to push the electric push rod 9 to the left, so that the transmission cover 11 moves to the space above the test position 302. At this time, the proximity switch Aa19 senses the position sensor 901 information of the electric push rod 9 and sends the information to the CPU through the A / D input module. The CPU then processes the instruction to the thyristor output module, controls the stepper motor A10 to stop, and instructs the thyristor output module to control the electric push rod 9 to push the transmission cover 11 downward, covering the valve ball 37 and valve seat 36 assembly to be tested. At this time, the CPU delays for 2-8 seconds to instruct the stepper motor A10 to push the electric push rod 9 to the right, so that the transmission cover 11 moves the valve ball 37 and valve seat 36 assembly to the test position 501. At this time, proximity switch Bb13 senses the position sensor head 901 information of electric push rod 9 and sends the information to CPU through A / D input module. CPU then instructs thyristor output module to control stepper motor A10 to stop and instructs thyristor output module to control electric push rod 9 to retract so that transmission cover 11 is reset upward. At this time, proximity switch B12 senses the information of valve ball 37 and valve seat 36 assembly and sends the information of valve ball 37 and valve seat 36 assembly to CPU through A / D input module. CPU then instructs thyristor output module to control light source device 27 to turn on the light and illuminate valve ball 37 and valve seat 36. At this time, illuminance sensors A14, B16, C32, and D33 begin to continuously collect illuminance data and send the collected illuminance values ​​to the CPU through the A / D input module. The CPU analyzes and processes the collected illuminance values ​​and compares them with the set values. Based on the comparison between the illuminance values ​​set by the program and the collected illuminance values, it determines the sealing degree of the gap between the valve ball 37 and the valve seat 36, that is, whether the valve ball 37 and valve seat 36 assembly product is a qualified product.

[0055] (4) When the collected illuminance value is greater than or equal to the set value, the valve ball 37 and valve seat 36 assembly is determined to be a defective product. The CPU commands the thyristor output module to control the electric push rod 9 of the transmission device 8 to push the transmission cover 11 downward, covering the defective product. After a delay of 2-8 seconds, the CPU commands the thyristor output module to control the stepper motor A10 to push the electric push rod 9, and the transmission cover 11 and the defective product move to the right to the sorting position 402. At this time, proximity switch Cc21 senses the position sensor 901 information of electric push rod 9, and proximity switch C20 senses the defective product and sends the information to the CPU through the A / D input module. The CPU then instructs the thyristor output module to de-energize the electromagnet 268 of the defective product leakage device 26 according to the defective information. The movable door 262 loses the attraction of the electromagnet 268, and the movable door 262 opens under the gravity of the valve ball 37 and valve seat 36 assembly, letting the defective valve ball 37 and valve seat 36 assembly leak into the defective product box 29.

[0056] (5) When the collected illuminance value is less than the set value, the valve ball 37 and valve seat 36 assembly is determined to be a qualified product. The CPU commands the thyristor output module to control the electric push rod 9 to push the transmission cover 11 downward, covering the qualified product. After a delay of 2-8 seconds, the CPU commands the thyristor output module to control the stepper motor A10 to push the electric push rod 9, and the transmission cover 11 and the qualified product move to the right to the qualified product position 403. At this time, proximity switch Dd41 senses the position sensor head 901 information of electric push rod 9, and proximity switch D40 senses the qualified valve ball 37 and valve seat 36 assembly information, and sends the information to the CPU through the A / D input module. The CPU receives the qualified information and instructs the thyristor output module to control the electric push rod 9 to reset and the transmission cover 11 to retract. Then, after a CPU delay of 2-8 seconds, the CPU instructs the thyristor output module to control the stepper motor A10 to push the electric push rod 9 and the transmission cover 11 to the left and standby above the test position 501. After testing, the qualified valve ball 37 and valve seat 36 assembly is moved to the qualified output position 401 when the next qualified assembly arrives.

[0057] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A valve ball seat sealing test system, characterized in that, include: The test platform is used to support the ball valve seat of the valve under test. A transmission device is used to transfer the valve ball and valve seat to different workstations; A light source device (27) is used to illuminate the bottom of the valve ball seat; The sensing device, located above the test platform, is used to sense the light intensity above the ball valve seat. The measurement and control host (7) is used to acquire the light intensity measured by the sensing device and perform analysis and processing; When the light intensity is less than the preset value, the sealing performance of the ball valve seat of the valve under test is deemed to be qualified; when the light intensity is greater than or equal to the preset value, the sealing performance of the ball valve seat of the valve under test is deemed to be unqualified.

2. The valve ball seat sealing test system according to claim 1, characterized in that, The testing platform is provided with a test input position (301), a test position (302), a test position (501), a sorting position (402), a qualified product position (403), and a qualified product output position (401). The test position (501) is provided with a central hole (28). The diameter of the central hole (28) is smaller than the diameter of the valve seat. The light source device (27) illuminates the bottom of the test valve ball seat from below through the central hole (28). The sensing device is located above the test position (501).

3. The valve ball seat sealing test system according to claim 2, characterized in that, The test platform is covered by an upper housing (6), which is used to seal the test area into a dark environment. The upper housing (6) has a test sample input port (601) and a qualified product output port (602) on its two sides respectively. The test sample input port (601) is located between the test sample input position (301) and the test position (302). The test sample input port (601) is equipped with a light-blocking curtain A (23). The qualified product output port (602) is located between the qualified product position (403) and the qualified product output position (401). The qualified product output port (602) is equipped with a light-blocking curtain B (25).

4. The valve ball seat sealing test system according to claim 1, characterized in that, The conveying device (8) includes a conveying track (801), a track opening (802), an electric push rod (9), a stepper motor A (10), a transmission cover (11), a rack (30), and a transmission gear A (31). The conveying track (801) is a rectangular groove structure with a track opening (802) in the bottom wall. A rack (30) is installed on the upper side of the track opening (802). The stepper motor A (10) is movably installed on the rack (30). A transmission gear A (31) is installed on the right side of the stepper motor A (10) and meshes with the rack (30). The electric push rod (9) is connected to the stepper motor A (10). The transmission cover (11) is installed under the electric push rod (9). The transmission cover (11) is cylindrical and is used to cover the valve ball (37) and valve seat (36) as the electric push rod (9) moves.

5. The valve ball seat sealing test system according to claim 4, characterized in that, The electric push rod (9) is equipped with a position sensor (901), and each station is equipped with a proximity switch. When the electric push rod (9) moves to the corresponding station, the proximity switch is used to sense the approaching position sensor (901) and send the information to the measurement and control host (7).

6. The valve ball seat sealing test system according to claim 3, characterized in that, The sensing device includes multiple sets of telescopic rods. The upper end of the telescopic rod is installed on the upper housing (6), and the lower end is equipped with a light intensity sensor. The light intensity sensor is used to sense the light leaking from the bottom of the ball valve seat after the light source illuminates it, and sends the light intensity value information to the measurement and control host (7).

7. The valve ball seat sealing test system according to claim 2, characterized in that, A defective product collection device (26) is provided at the sorting station (402) to collect valve balls and seats that fail the test. The defective product collection device (26) includes a frame (261), a movable door (262), a magnetic block (2621), a return spring (263), an adjusting bracket (264), an adjusting bolt (265), a spring shaft (266), a door hinge (267), and an electromagnet (268). The frame (261) is provided around the movable door (262). The movable door (262) is installed in the left middle part of the frame (261). Inside the frame (261), the movable door... (262) A return spring (263) is installed below; an adjustment bracket (264) is installed on the inner side of the right wall of the frame (261) below the return spring (263); the adjustment bracket (264) is movably and adjustablely connected to the return spring (263); the return spring (263) elastically supports the movable door (262); the defective product leakage device (26) is used to execute the command of the measurement and control host (7) to the electromagnet (268), control the movable door (262), and let the unqualified valve ball (37) and valve seat (36) kits leak into the defective product box (29) when passing through the movable door (262).

8. The valve ball seat sealing test system according to claim 2, characterized in that, An input device (38) is provided at the input position (301) of the test sample. The input device (38) includes a stepper motor C (381), a push fork (382), a screw shaft (383), and an input frame (384). The input frame (384) is installed below the test platform. A push fork groove (303) is provided on the test platform. The screw shaft (383) is installed on the input frame (384). The stepper motor C (381) is installed on the screw shaft (383). The push fork (382) is installed on the stepper motor C (381). The push fork (382) passes through the push fork groove (303) and is used to push the valve ball seat of the test sample from the input position (301) to the test position (302).

9. The valve ball seat sealing test system according to claim 1, characterized in that, The measurement and control host (7) includes a control box (71), in which a single-chip microcomputer controller (72) and a power supply (73) are installed. A control panel (74) is installed on the front of the control box (71). The control panel (74) includes a digital tube display module A (741) for displaying the pass rate, a digital tube display module B (742) for displaying the number of passes, a digital tube display module C (743) for displaying the total number of measurements, a digital tube display module D (744) for displaying the illuminance, a power switch (745), a test start button (746), a test pause button (747), and a test stop button (748).

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