A detection device and method for an electric control valve of a refrigeration compressor

Abstract

The embodiment of the application provides a kind of refrigeration compressor electric control valve detection device and detection method, it is related to refrigeration compressor electric control valve detection technical field.A kind of refrigeration compressor electric control valve detection device, including rack, the center of the top of the rack is placed with the valve body for performance detection, and valve body is positioned by valve seat and rack clamping, and PLC controller is fixed outside the rack, and walking wheel for moving is set in the periphery of the bottom of the rack;The two sides of the rack close to valve body are provided with adjusting assembly and positioning assembly for valve seat fixed cooperation, and adjusting assembly includes double-head motor embedded in rack;The outside of the valve body is respectively provided with import end and export end, and positioning assembly is provided with detection assembly for pressure intensity and air tightness detection in import end and export end on valve body.The pressure resistance and air tightness of electric control valve are efficiently and flexibly accurately detected, and the efficiency and accuracy of maintenance are high.

Description

Technical Field

[0001] This invention belongs to the field of testing technology for electronically controlled valves of refrigeration compressors, and particularly relates to a testing device and testing method for electronically controlled valves of refrigeration compressors. Background Technology

[0002] A refrigeration compressor is a mechanical device used to compress and transport gaseous refrigerant. It is the core and heart of a refrigeration system. The capacity and characteristics of the compressor determine the capacity and characteristics of the refrigeration system. In a sense, the design and matching of a refrigeration system is to bring out the capacity of the compressor. The electronically controlled valve is the key valve body that controls the inlet and outlet channels of the refrigeration compressor.

[0003] In existing technology (patent application CN104502030B, entitled "Valve Airtightness Testing System"), the opening angle of the valves under test at each station can be kept consistent, ensuring consistent test conditions for all valves and resulting in more accurate test results. However, in implementing this technical solution, at least the following problems were found in the existing technology: To ensure the normal opening and closing control of the refrigeration compressor's inlet and outlet channels, it is necessary to inspect the electronically controlled valves on the refrigeration compressor. During this period, the pressure resistance and airtightness of the electronically controlled valves are basically tested manually one by one. This cannot be done efficiently and flexibly to accurately test the pressure resistance and airtightness of the electronically controlled valves. At the same time, it reduces the testing efficiency. Frequent manual intervention is also prone to large testing errors, which reduces the testing accuracy of the electronically controlled valves. Summary of the Invention

[0004] This application aims to at least address one of the technical problems existing in the prior art: the inability to efficiently and flexibly accurately test the pressure resistance and airtightness of electrically controlled valves, resulting in low maintenance efficiency and low accuracy. To this end, this application proposes a testing device and method for electrically controlled valves of refrigeration compressors.

[0005] To achieve the above objectives, the specific technical solution of the present invention is as follows: A testing device for an electronically controlled valve of a refrigeration compressor includes a frame, a valve body for performance testing is placed at the center of the top of the frame, the valve body is positioned by being snapped into the frame by a valve seat, a PLC controller is fixed on the outside of the frame, and wheels for movement are provided around the bottom of the frame. The platform is provided with adjustment components and positioning components for fixing the valve seat on both sides near the valve body. The adjustment components include a double-headed motor embedded in the platform, and the positioning components include positive and negative lead screws that rotate on both sides of the platform near the double-headed motor. The valve body is provided with an inlet end and an outlet end on its outer side, and the positioning component is provided with a detection component for detecting the internal pressure and airtightness of the inlet end and outlet end of the valve body, and the detection component includes a booster pump for supplying booster pressure.

[0006] Preferably, the adjustment assembly further includes a main synchronous pulley fixed to the two output shafts of the dual-head motor via a coupling, and a driven synchronous pulley on the main synchronous pulley via a synchronous belt and connected horizontally by a rotating rod. A dual-head cylinder is embedded in the rotating rod of the two sets of driven synchronous pulleys, and a main bevel gear is fixed on the two piston rods of the dual-head cylinder, and a driven bevel gear is set outside the main bevel gear and sleeved with the positive and negative lead screws.

[0007] Preferably, the positioning assembly further includes a screw sleeve threaded to both sides of the positive and negative screws, and a bracket that slides with the platform is fixed on the screw sleeve and fixedly cooperates with the booster pump. A positioning block is fixedly connected to the middle of the inner side of the bracket, and positioning grooves that engage with the positioning block are opened on both sides of the valve seat on the valve body.

[0008] Preferably, the detection assembly further includes a helium storage tank threadedly connected to the inlet of the booster pump, with the booster pump and the helium storage tank being diagonally distributed along the longitudinal axis of the valve body, and a helium delivery pipe connected to the outlet of the booster pump. At the end of the helium delivery pipe is a pressure head that is fixedly fitted with a bracket and used for pressure detection at the inlet and outlet ends of the valve body. A helium guide hole is provided on the inner circumference of the pressure head for pressure tightness detection at the inlet and outlet ends of the valve body.

[0009] Preferably, the platform is provided with limiting grooves that slide with the bracket on all four sides, and the outer side of the platform is fastened with a placement plate for temporarily placing the valve body.

[0010] Preferably, the top of the platform has a slot at its center that engages with the valve seat on the valve body, and the slot is hexagonal in shape.

[0011] Preferably, the outer side of the top pressure head is fixedly connected to a sealing seat that cooperates with the sealing of the inlet and outlet ends of the valve body.

[0012] Preferably, a top cover with bearings is rotatably connected to the frame, and observation windows are provided on both sides of the top cover.

[0013] Preferably, an arc-shaped guide bar is fixed on the outer side of the top cover, and an arc-shaped guide groove is provided on the inner side of the frame to slide with the arc-shaped guide bar.

[0014] A method for detecting an electrically controlled valve of a refrigeration compressor, based on the aforementioned device for detecting an electrically controlled valve of a refrigeration compressor, includes the following steps: S1. Insert the valve seat of the valve body to be tested into the slot of the test bench, align the positioning slot of the valve seat with the positioning block, align the inlet and outlet ends of the valve body with the top pressure head, and start the double-headed cylinder to make the main bevel gear mesh with the driven bevel gear. S2. Turn on the dual-head motor, which drives the slave synchronous pulley to rotate through the main synchronous pulley and synchronous belt, so that the positive and negative lead screws drive the lead screw sleeve and the bracket slides along the limit slide groove, allowing the positioning block to be inserted into the positioning groove and positioning valve body. S3. The bracket drives the diagonally distributed booster pump, helium storage tank and top pressure head to move inward. The top pressure head is inserted into the inlet and outlet ends of the valve body and the sealing seat is sealed. The pressure resistance is judged according to the pressure difference between the inlet and outlet ends. S4. Start the electric push rod to make the differential gear mesh with the convex teeth of the top cover. The dual-head motor drives the top cover to rotate around the bearing to seal the platform. The electromagnet is energized to attract the fixed magnet to fix the top cover. S5. Stop the dual-head motor, close the dual-head cylinder to disengage the main bevel gear from the driven bevel gear, turn on the booster pump to send helium gas into the valve body through the helium delivery pipe and helium guide hole, check for leaks and judge the sealing performance by the soap water method. S6. Turn off the dual-head motor, reset the electric push rod to disengage the differential gear from the convex tooth, de-energize the electromagnet, pull open the top cover to reset the positioning block and top pressure head, and remove the valve body to prepare for the next set of tests.

[0015] The refrigeration compressor electronic valve detection device of the present invention has the following advantages: 1. This refrigeration compressor electronically controlled valve detection device first controls a double-headed cylinder to adjust the meshing stroke between two sets of main bevel gears and driven bevel gears to the correct position. Then, it controls a double-headed motor to drive the rotating rods on two sets of driven synchronous pulleys through the synchronous belts on two sets of main synchronous pulleys. The rotating rods drive the two sets of driven bevel gears to rotate through the meshing two sets of main bevel gears on the double-headed cylinder. The two sets of driven bevel gears drive the screw sleeves on two positive and negative screws to move inward synchronously. The two sets of screw sleeves drive two sets of positioning blocks to lock into the positioning grooves of the valve seat through two sets of brackets. The positioning work between the valve body and the frame is achieved by locking the valve seat, which replaces the manual positioning method, is convenient and fast, and the positioning is firm.

[0016] 2. This refrigeration compressor electronically controlled valve testing device, simultaneously, two sets of brackets move inward, driving two diagonally distributed sets of booster pumps, helium storage tanks, and pressure heads, which move inward synchronously with two sets of positioning blocks. The two sets of pressure heads gradually penetrate into the inlet and outlet ends of the valve body, generating a pressure difference between them. Based on the pressure difference data, the pressure resistance of the valve body at the inlet and outlet ends is determined. Next, the two sets of booster pumps are activated, and helium from the two helium storage tanks is supplied to the two sets of pressure heads through two helium delivery pipes. Helium is then supplied to the inlet and outlet ends of the valve body through circumferentially distributed helium guide holes. Leakage signals are detected, and the leak point is located. Finally, the valve body's sealing performance is determined by observing bubbles using the soapy water method, completing the pressure resistance and airtightness testing of the valve body.

[0017] 3. In this refrigeration compressor electronically controlled valve testing device, before proceeding, according to actual needs, two sets of electric push rods are controlled to open synchronously and the meshing stroke between the two sets of differential gears and cam teeth is adjusted to the correct position. Then, the dual-head motor is controlled to drive the top cover on the two rows of cam teeth to rotate linearly through the two sets of meshed differential gears until the top cover seals the space above the test bench. Then, two sets of circuit breakers use electromagnets to electromagnetically position two sets of fixed magnets to achieve the electromagnetic positioning effect of the sealed top cover, so as to prevent external environmental factors from interfering with the valve body testing work on the test bench and improve the testing accuracy of the valve body. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a structural testing state diagram of a refrigeration compressor electronic control valve testing device according to the present invention; Figure 2 This is an initial state diagram of the structure of a refrigeration compressor electronically controlled valve detection device according to the present invention; Figure 3 This is a partial cross-sectional view of the structure and detection status of a refrigeration compressor electronic control valve detection device according to the present invention. Figure 4 This is a partial cross-sectional view of the initial state of the structure of a refrigeration compressor electronically controlled valve detection device according to the present invention; Figure 5 This is an initial state diagram of the valve body, valve seat, adjusting assembly, positioning assembly, and detection assembly of the present invention. Figure 6 This is a side cross-sectional view of the adjustment component structure in its working state according to the present invention; Figure 7 This is a partial side view of the positioning and detection components of the present invention; Figure 8 This is a partial exploded side view of the positioning component and detection component structure of the present invention; Figure 9 This is a front view of the valve body and valve seat structure of the present invention; Figure 10 This is a bottom view of the protective structure of the top cover, dual-head motor, and protective components of the present invention in a protected state. Figure 11 This is a bottom view of the dual-head motor structure of the present invention; Figure 12 This is a partial cross-sectional view of the top cover structure of the present invention; Figure 13 This is a top sectional view of the platform structure of the present invention.

[0020] The markings in the diagram are as follows: 1. Stand; 2. Valve body; 3. Valve seat; 41. Dual-head motor; 42. Main synchronous pulley; 43. Driven synchronous pulley; 44. Dual-head cylinder; 45. Main bevel gear; 46. Driven bevel gear; 51. Lead screw; 52. Lead screw sleeve; 53. Bracket; 54. Positioning block; 55. Positioning groove; 61. Booster pump; 62. Helium storage tank; 63. Helium transfer pipe; 64. Top pressure head; 65. Helium guide hole; 71. Convex tooth; 72. Electric push rod; 73. Differential gear; 74. Fixed magnet; 75. Electromagnet; 76. Circuit breaker; 8. Limiting groove; 9. Slot; 10. Sealing seat; 11. Bearing; 12. Top cover; 13. Arc-shaped guide bar; 14. Arc-shaped guide groove; 15. Placement plate. Detailed Implementation

[0021] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments: like Figures 1-13 As shown, a refrigeration compressor electronic control valve testing device of the present invention includes a frame 1. A valve body 2 for performance testing is placed at the center of the top of the frame 1, and the valve body 2 is positioned by a valve seat 3. A PLC controller is fixed on the outside of the frame 1, and casters for movement are provided around the bottom of the frame 1. A placement plate 15 for temporarily placing the valve body 2 is snapped onto the outside of the frame 1 to facilitate the placement of the valve body 2 before and after testing. A slot 9 with a hexagonal design is provided at the center of the top of the frame 1 to engage with the valve seat 3 on the valve body 2, facilitating the pre-attached placement of the valve body 2. A top cover 12 with a bearing 11 is rotatably connected to the frame 1. The valve body 2 on the test stand 1 is sealed and protected to prevent external environmental factors from interfering with the testing of the valve body 2. Observation windows are provided on both sides of the top cover 12 to facilitate observation of the testing status of the valve body 2 inside the top cover 12. An arc-shaped guide bar 13 is fixed on the outer side of the top cover 12, and an arc-shaped guide groove 14 that slides with the arc-shaped guide bar 13 is provided on the inner side of the test stand 1. This provides sliding support for the top cover 12 in the open and closed state and improves the rotational opening and closing stability of the top cover 12. At the same time, a scale groove is provided on the circumference of the top cover 12 near the arc-shaped guide bar 13, and a pointer that cooperates with the scale groove is fixed on the side of the test stand 1 near the bearing 11 to know the rotation angle of the top cover 12. The test stand 1 is equipped with adjustment and positioning components on both sides near the valve body 2 for fixing the valve seat 3. The adjustment components include a double-headed motor 41 embedded in the test stand 1, and the positioning components include positive and negative lead screws 51 rotating on both sides of the test stand 1 near the double-headed motor 41. By engaging the valve seat 3, the valve body 2 and the test stand 1 are positioned, replacing the manual positioning method, which is convenient, quick, and secure. The valve body 2 has an inlet and an outlet on its outer side. The positioning components are equipped with a detection component for testing the pressure and airtightness of the inlet and outlet of the valve body 2. The detection component includes a booster pump 61 for supplying booster pressure, generating a pressure difference between the inlet and outlet. Based on the pressure difference data, the pressure resistance of the valve body 2 at the inlet and outlet is determined. Helium gas is supplied to the inlet and outlet of the valve body 2, and leakage signals are detected to locate the leakage point. The sealing performance of the valve body 2 is then determined by observing the bubbles using the soap water method, thus completing the pressure resistance and airtightness test of the valve body 2.

[0022] like Figures 5-9 As shown, the adjustment assembly also includes a main synchronous pulley 42 fixed to the two output shafts of the dual-head motor 41 via a coupling, and a driven synchronous pulley 43 driven by a synchronous belt on the main synchronous pulley 42, which is horizontally connected by a rotating rod. A dual-head cylinder 44 is embedded in the rotating rod inside the two sets of driven synchronous pulleys 43, and a main bevel gear 45 is fixed on the two piston rods of the dual-head cylinder 44, and a driven bevel gear 46 is set outside the main bevel gear 45 and sleeved with the positive and negative lead screws 51. After the dual-head cylinder 44 is controlled to adjust the meshing stroke between the two sets of main bevel gears 45 and driven bevel gears 46 to the correct position, the dual-head motor 41 is controlled to drive the rotating rod on the two sets of driven synchronous pulleys 43 to rotate via the synchronous belt on the two sets of main synchronous pulleys 42. The rotating rod drives the two sets of driven bevel gears 46 to rotate accordingly via the two sets of main bevel gears 45 meshing in the dual-head cylinder 44. The positioning assembly also includes screw sleeves 52 threaded to both sides of the positive and negative screws 51. The two sets of screw sleeves 52 on the two positive and negative screws 51 are driven by the bevel gear 46 to move inward synchronously. The screw sleeves 52 are fixed with brackets 53 that slide with the frame 1 and are fixed with the booster pump 61. The frame 1 is provided with limiting grooves 8 that slide with the brackets 53 on all four sides, which play a role in limiting the sliding of the brackets 53 to prevent the brackets 53 from tilting during displacement. The center of the inner side of the brackets 53 is fixedly connected with a positioning block 54. The valve seat 3 on the valve body 2 is provided with positioning grooves 55 on both sides that engage with the positioning blocks 54. The two sets of screw sleeves 52 drive the two sets of positioning blocks 54 to engage with the positioning grooves 55 of the valve seat 3 through the two sets of brackets 53. The positioning between the valve body 2 and the frame 1 is achieved by engaging the valve seat 3, which replaces the manual positioning method, is convenient and fast, and the positioning is firm.

[0023] The detection assembly also includes a helium storage tank 62 threadedly connected to the inlet of the booster pump 61, with the booster pump 61 and the helium storage tank 62 diagonally distributed along the longitudinal axis of the valve body 2, and a helium delivery pipe 63 connected to the outlet of the booster pump 61. At the end of the helium delivery pipe 63, there is a pressure head 64 fixedly engaged with the bracket 53, which is used to detect the pressure at the inlet and outlet of the valve body 2. The two sets of brackets 53 move inward synchronously, driving the two diagonally distributed booster pumps 61, helium storage tank 62 and pressure head 64 to move inward synchronously with the two sets of positioning blocks 54. The two sets of pressure heads 64 gradually penetrate into the inlet and outlet of the valve body 2, thereby generating a pressure difference at the inlet and outlet. Based on the pressure difference data, the pressure resistance at the inlet and outlet of the valve body 2 is determined. A helium guide hole 65 is provided on the inner circumference of the pressure head 64 for pressure tightness testing of the inlet and outlet ends of the valve body 2. First, the two sets of booster pumps 61 are turned on and the helium in the two sets of helium storage tanks 62 is supplied into the two sets of pressure heads 64 through the two helium supply pipes 63. Then, the helium is supplied into the inlet and outlet ends of the valve body 2 through the circumferentially distributed helium guide holes 65. The leakage signal is detected and the leakage point is located. Then, the sealing performance of the valve body 2 is judged by observing the bubbles using the soap water method, thus completing the pressure resistance and air tightness test of the valve body 2. A sealing seat 10 is fixedly connected to the outside of the pressure head 64 to seal the inlet and outlet ends of the valve body 2, which plays a sealing role between the pressure head 64 and the inlet and outlet ends of the valve body 2 to prevent helium leakage.

[0024] like Figures 10-13 As shown, during the pressure resistance and airtightness testing of valve body 2, external environmental factors can easily interfere with the testing operation of valve body 2, and it does not have a sealing protection function. The test bench 1 is equipped with a protective component that works with the top cover 12. The protective component includes protruding teeth 71 that are circumferentially fixed on both sides of the inner wall of the top cover 12, and electric push rods 72 that are embedded in the coupling of the two output shafts of the dual-head motor 41. Differential gears that mesh with the protruding teeth 71 are fixed on the piston rods of the two electric push rods 72. 73. First, control the two electric push rods 72 to open synchronously and drive the two sets of differential gears 73 to move outward and mesh with the two rows of circumferentially distributed convex teeth 71. Then, with the two bearings 11 providing rotational support for the top cover 12, control the double-head motor 41 to open and drive the top cover 12 on the two rows of convex teeth 71 to rotate linearly through the two sets of differential gears 73 that are in position until the top cover 12 rotates to achieve a blocking state against the stand 1, so as to avoid interference from external environmental factors on the detection operation of the valve body 2. Furthermore, a fixed magnet 74 is fixed on the outer side of the top cover 12, and an electromagnet 75 is fixed on the outer side of the platform 1 near the fixed magnet 74. A circuit breaker 76 is fixed on the outer side of the electromagnet 75. The two sets of circuit breakers 76 are controlled to simultaneously energize the electromagnet 75. After being energized, the two sets of electromagnets 75 apply electromagnetic attraction to the two sets of fixed magnets 74, which electromagnetically positions the top cover 12 in place, thereby improving the sealing stability of the top cover 12 and preventing leakage of the top cover 12 in the sealed state.

[0025] A method for detecting an electronically controlled valve of a refrigeration compressor, based on a device for detecting an electronically controlled valve of a refrigeration compressor, includes the following steps: Step 1: First, clamp the valve seat 3 on the valve body 2 to be tested into the slot 9 on the stand 1, with the positioning slot 55 on the valve seat 3 facing the positioning block 54, and the inlet end and outlet end on the valve body 2 facing the top pressure head 64. First, control the double-headed cylinder 44 to open and drive the two sets of main bevel gears 45 to move outward synchronously and clamp into the meshing part of the two sets of slave bevel gears 46. Step 2: Control the dual-head motor 41 to start and drive the two sets of main synchronous pulleys 42 to rotate synchronously through two couplings. The two sets of main synchronous pulleys 42 drive the two sets of rotating rods on the two sets of driven synchronous pulleys 43 to rotate accordingly through two synchronous belts. The rotating rods drive the two sets of main bevel gears 45 and driven bevel gears 46 to rotate linearly forward through the dual-head cylinder 44. The two sets of driven bevel gears 46 drive the two sets of forward and reverse lead screws 51 to rotate linearly forward. The two sets of forward and reverse lead screws 51 drive the two sets of lead screw sleeves 52 to move inward synchronously. The two sets of lead screw sleeves 52 drive the two sets of brackets 53 to slide inward in the limiting slide groove 8. At the same time, the two sets of brackets 53 also drive the two sets of positioning blocks 54 to move inward toward the valve seat 3 until the two sets of positioning blocks 54 are locked in the two sets of positioning grooves 55 in the valve seat 3. The positioning work between the valve body 2 and the frame 1 is completed through the valve seat 3. Step 3: Simultaneously, the two sets of brackets 53 that move inward synchronously also drive the diagonally distributed booster pumps 61 and helium storage tanks 62 to move towards the valve body 2 on the valve seat 3, until the two sets of brackets 53 drive the two sets of top pressure heads 64 to be inserted into the inlet and outlet ends of the valve body 2 respectively, and the two sets of sealing seats 10 seal the inlet and outlet ends with the two sets of top pressure heads 64. As the two sets of top pressure heads 64 gradually penetrate into the inlet and outlet ends of the valve body 2, the compressive stress in the inlet and outlet ends of the valve body 2 increases, and then a pressure difference is generated in the inlet and outlet ends. Based on the pressure difference data, the compressive strength in the inlet and outlet ends of the valve body 2 is judged. Step 4: According to the on-site testing requirements, first control the two electric push rods 72 to open synchronously and drive the two sets of differential gears 73 to move outward and mesh onto the two rows of circumferentially distributed convex teeth 71. Then, with the two bearings 11 providing rotational support for the top cover 12, control the double-head motor 41 to open and drive the top cover 12 on the two rows of convex teeth 71 to rotate linearly through the two sets of differential gears 73 that are in the meshing position, until the top cover 12 rotates to the point where it achieves a blocking state against the platform 1. At this time, control the two sets of circuit breakers 76 to simultaneously energize the electromagnets 75. The two sets of electromagnets 75 after being energized will apply electromagnetic attraction to the two sets of fixed magnets 74 to perform electromagnetic positioning of the top cover 12 that is in the blocking position, so as to avoid interference from external environmental factors on the testing operation of the valve body 2. Step 5: Control the dual-head motor 41 to pause, then control the dual-head cylinder 44 to close and drive the two sets of main bevel gears 45 to move outward synchronously and disengage from the meshing part of the two sets of bevel gears 46 to the initial position. First, control the two sets of booster pumps 61 to start and supply the helium in the two sets of helium storage tanks 62 through the two helium supply pipes 63 into the two sets of top pressure heads 64 that are gradually going deeper. Then, the helium is introduced into the inlet and outlet ends of the valve body 2 through the circumferentially distributed helium guide holes 65 to detect leakage signals, locate the leakage point, and use the soap water method to judge the sealing performance of the valve body 2 by observing the bubbles. This completes the pressure resistance and airtightness test of the valve body 2. Step Six: After the performance test of valve body 2 is completed, first control the dual-head motor 41 to shut down, then control the two electric push rods 72 to shut down synchronously and drive the two sets of differential gears 73 to move inward and disengage from the meshing part of the two rows of circumferentially distributed convex teeth 71 to the initial position. Then control the two sets of circuit breakers 76 to de-energize the electromagnets 75 synchronously. After the power is de-energized, the two sets of electromagnets 75 lose the electromagnetic attraction to the two sets of fixed magnets 74, and release the top cover 12 that is in place. Then pull the top cover 12, which has lost its limiting measures, back to its original position. Then control the two sets of positioning blocks 54 to disengage from the two sets of positioning grooves 55 in the valve seat 3, and the two sets of top pressure heads 64 to disengage from the inlet end and outlet end on the valve body 2 to the initial position. Then remove the valve seat 3 on the valve body 2 from the slot 9 to prepare for the next set of valve body 2 testing work.

[0026] It should be noted that the specific models and specifications of the dual-head motor 41, dual-head cylinder 44, booster pump 61, electric push rod 72, electromagnet 75 and circuit breaker 76 need to be selected and determined according to the actual specifications of the device. The specific selection calculation method adopts the existing technology in this field, so it will not be elaborated in detail.

[0027] The power supply circuits for the dual-head motor 41, dual-head cylinder 44, booster pump 61, electric push rod 72, electromagnet 75, and circuit breaker 76 are clear to those skilled in the art and will not be described in detail here.

[0028] It is understood that the present invention has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the invention. Furthermore, under the teachings of the present invention, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of the present invention.

Claims

1. A testing device for an electrically controlled valve of a refrigeration compressor, comprising a test stand (1), characterized in that: A valve body (2) for performance testing is placed at the center of the top of the test stand (1), and the valve body (2) is positioned by the valve seat (3) and the test stand (1) is fixed on the outside of the test stand (1). A PLC controller is fixed on the outside of the test stand (1), and wheels for movement are provided around the bottom of the test stand (1). The platform (1) is provided with adjustment components and positioning components on both sides near the valve body (2) for fixed engagement with the valve seat (3). The adjustment components include a double-headed motor (41) embedded in the platform (1), and the positioning components include positive and negative lead screws (51) rotating on both sides of the platform (1) near the double-headed motor (41). The valve body (2) is provided with an inlet end and an outlet end on its outer side, and the positioning component is provided with a detection component for detecting the pressure and air tightness of the inlet end and outlet end of the valve body (2), and the detection component includes a booster pump (61) for supplying booster pressure. The adjustment assembly also includes a main synchronous pulley (42) fixed to the two output shafts of the double-head motor (41) by a coupling, and a driven synchronous pulley (43) driven by a synchronous belt on the main synchronous pulley (42), which is connected horizontally by a rotating rod. A double-head cylinder (44) is embedded in the rotating rod inside the two sets of driven synchronous pulleys (43), and a main bevel gear (45) is fixed on the two piston rods of the double-head cylinder (44), and a driven bevel gear (46) is set outside the main bevel gear (45) and sleeved with the positive and negative lead screws (51). The positioning assembly also includes a screw sleeve (52) threaded to both sides of the positive and negative screw (51), and a bracket (53) that slides with the frame (1) is fixed on the screw sleeve (52) and fixedly engaged with the booster pump (61). A positioning block (54) is fixedly connected to the middle of the inner side of the bracket (53), and positioning grooves (55) that engage with the positioning block (54) are provided on both sides of the valve seat (3) on the valve body (2). The platform (1) is rotatably connected to a top cover (12) with bearings (11), and observation windows are provided on both sides of the top cover (12). The frame (1) is equipped with a protective component that works in conjunction with the top cover (12). The protective component includes protruding teeth (71) that are circumferentially fixed on both sides of the inner wall of the top cover (12), and electric push rods (72) that are embedded in the coupling of the two output shafts of the dual-head motor (41). Differential gears (73) that mesh with the protruding teeth (71) are fixed on the piston rods of the two electric push rods (72).

2. The refrigeration compressor electronic valve detection device according to claim 1, characterized in that: The detection assembly also includes a helium storage tank (62) threadedly connected to the inlet of the booster pump (61), and the booster pump (61) and the helium storage tank (62) are diagonally distributed along the longitudinal axis of the valve body (2), and a helium delivery pipe (63) connected to the outlet of the booster pump (61), and a pressure head (64) fixedly connected to the end of the helium delivery pipe (63) and used for pressure detection at the inlet and outlet ends of the valve body (2), and a helium guide hole (65) for pressure compaction detection at the inlet and outlet ends of the valve body (2) is provided on the inner circumference of the pressure head (64).

3. The refrigeration compressor electronic valve detection device according to claim 2, characterized in that: The platform (1) is provided with a limiting groove (8) that slides with the bracket (53) on all four sides, and a placement plate (15) for temporarily placing the valve body (2) is fastened on the outside of the platform (1).

4. The refrigeration compressor electronic valve detection device according to claim 3, characterized in that: The top center of the stand (1) is provided with a slot (9) that engages with the valve seat (3) on the valve body (2) and is designed in a hexagonal shape.

5. The refrigeration compressor electronic valve detection device according to claim 4, characterized in that: The outer side of the top pressure head (64) is fixedly connected to a sealing seat (10) that cooperates with the sealing of the inlet and outlet ends of the valve body (2).

6. The refrigeration compressor electronic valve detection device according to claim 5, characterized in that: An arc-shaped guide bar (13) is fixed on the outer side of the top cover (12), and an arc-shaped guide groove (14) is provided on the inner side of the frame (1) to slide with the arc-shaped guide bar (13).

7. A refrigeration compressor electronically controlled valve detection device according to claim 6, characterized in that: A fixed magnet (74) is fixed on the outside of the top cover (12), and an electromagnet (75) is fixed on the outside of the stand (1) near the fixed magnet (74).

8. A method for detecting an electrically controlled valve of a refrigeration compressor, comprising the electrically controlled valve detection device for a refrigeration compressor according to claim 7, characterized in that: Includes the following steps: S1. Insert the valve seat (3) of the valve body (2) to be tested into the slot (9) of the test bench (1), so that the positioning slot (55) of the valve seat (3) is aligned with the positioning block (54) and the inlet and outlet ends of the valve body (2) are aligned with the top pressure head (64). Start the double-head cylinder (44) to make the main bevel gear (45) mesh with the slave bevel gear (46). S2. Turn on the dual-head motor (41), and drive the synchronous pulley (43) to rotate through the main synchronous pulley (42) and the synchronous belt, so that the positive and negative screws (51) drive the screw sleeve (52), and the bracket (53) slides along the limit slide groove (8), so that the positioning block (54) is inserted into the positioning groove (55) and the positioning valve body (2). S3, the bracket (53) drives the diagonally distributed booster pump (61), helium storage tank (62) and top pressure head (64) to move inward, the top pressure head (64) is inserted into the inlet and outlet ends of the valve body (2), the sealing seat (10) is sealed, and the pressure resistance is judged according to the pressure difference between the inlet and outlet ends; S4. Start the electric push rod (72) to make the differential gear (73) mesh with the tooth (71) of the top cover (12). The double-headed motor (41) rotates the sealing platform (1) around the bearing (11) with the top cover (12). The electromagnet (75) is energized to attract the magnet (74) to fix the top cover (12). S5. Stop the dual-head motor (41), close the dual-head cylinder (44) to disengage the main bevel gear (45) from the secondary bevel gear (46), turn on the booster pump (61) to send helium gas into the valve body (2) through the helium delivery pipe (63) and the helium guide hole (65), check for leaks and judge the sealing performance by soap water method; S6. Turn off the dual-head motor (41), reset the electric push rod (72) to disengage the differential gear (73) from the tooth (71), de-energize the electromagnet (75), pull open the top cover (12), reset the positioning block (54) and the top pressure head (64), remove the valve body (2) to prepare for the next set of tests.

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