An energy feedback inverter test equipment

Abstract

The present invention discloses an energy feedback type inverter test equipment, and relates to the technical field of inverter test equipment. It comprises a support plate, a driving assembly is arranged on the support plate, and a circular plate is arranged on the driving assembly. In the invention, when the inverters in four detection boxes are tested under high pressure, low pressure, high temperature and low temperature respectively, the first cross plate on the connecting rod is driven to rise by the hydraulic cylinder in the adjustment assembly, and the four sleeves are separated from the four detection boxes respectively by the first cross plate, and then the circular plate is driven by the motor in the driving assembly to rotate three times by ninety degrees on the circular frame plate. After each rotation of ninety degrees, the raised sleeve is re-sleeved on the connecting pipe through the adjustment assembly, so that the inverter in the detection box can be tested in different environments, thereby improving the test effect of the test equipment on the inverter, and also improving the test efficiency and accuracy, and reducing the labor intensity.

Description

Technical Field

[0001] The invention relates to the technical field of frequency converter testing equipment, in particular to energy feedback type frequency converter testing equipment. Background Art

[0002] With the increasing demand for industrial automation and energy efficiency, inverters, as a core power control device, are increasingly used in motor speed regulation, energy saving and consumption reduction, and system optimization. In order to improve the reliability of energy regenerative inverters under different working conditions, energy regenerative inverters are usually tested in simulated environments before leaving the factory.

[0003] In the prior art, a Chinese patent with publication number "CN216285412U" discloses a frequency converter test platform, which is provided by placing multiple frequency converters between adjacent baffles, with the frequency converter at the head end being against the push plate, starting the motor, and driving the lead screw to rotate, so that the movable plate can translate on the surface of the lead screw, and the two ends of the connecting bracket are fixed with bolts on the side of the movable plate, and the bottom array of the connecting bracket is fixed with a push plate, and the position between the push plate and the adjacent baffle is flush, and the push plate and the surface of the baffle cooperate with each other, and the motor rotates a set number of circles, so that the push plate pushes the frequency converter a certain distance, so that the end frequency converter is located directly below the test device, and the test device is located between the adjacent baffles, and the cylinder is started to lift the test device to detect the frequency converter, and the motor is started again to push the untested frequency converter out of the test range, and the untested frequency converter is tested in turn, which solves the problem that the existing frequency converter test equipment needs to manually take out the frequency converter and reinstall it after being placed in the test bench for testing, and cannot realize automatic loading and unloading of the frequency converter, which is troublesome to operate and delays the test progress.

[0004] Before using the existing inverter, it is necessary to use testing equipment to test the inverter to ensure the effectiveness of the inverter. However, when testing the inverter, the existing testing equipment cannot test the inverter in different environments, such as high-voltage environment, low-voltage environment, high-temperature environment and low-temperature environment. Although different testing equipment can be used to achieve the test results of the inverter in different environments, it is extremely manpower-consuming to carry and install the inverter. Therefore, the present invention proposes an energy feedback inverter testing equipment to solve the above-mentioned problems. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides an energy feedback inverter testing device, which solves the problems mentioned in the above background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0007] An energy feedback inverter test device comprises a support plate, a drive assembly is arranged on the support plate, a circular plate is arranged on the drive assembly, and four detection boxes are fixedly mounted on the upper end surface of the circular plate;

[0008] Four protective boxes are fixedly installed on the support plate and outside the driving assembly, the front surface of the protective box is provided with a box door, a grid plate is opened on the box door, and a cleaning assembly is provided on the outside of the grid plate;

[0009] A booster pump, a vacuum pump, a heater and a cooling air compressor are respectively arranged inside the four protection boxes, and a connecting component is arranged on the protection box, through which the four detection boxes are connected with the four protection boxes in sequence.

[0010] Preferably, the connecting component includes an output tube fixedly connected to the protection box and a connecting tube fixedly connected to the detection box body, the end of the output tube away from the protection box is fixedly connected to a telescopic hose, and the end of the telescopic hose away from the output tube is provided with an adjustment component.

[0011] Preferably, the adjustment assembly includes a bracket plate fixedly mounted on four protective boxes, a hydraulic cylinder fixedly mounted on the bracket plate, a connecting rod fixedly connected to the output end of the hydraulic cylinder, a first cross plate fixedly mounted on the bottom end of the connecting rod, four bearings fixedly mounted on the lower end surface of the first cross plate, a sleeve fixedly mounted on the bearing, a through pipe fixedly connected to the side end surface of the sleeve, the through pipe fixedly connected to the telescopic hose, and sleeved on the connecting pipe through the sleeve.

[0012] Preferably, an inner side surface of the sleeve is provided with an internal thread, an outer side surface of the connecting pipe is provided with an external thread, and the sleeve and the connecting pipe are connected via the internal thread and the external thread.

[0013] Preferably, a sealing assembly is provided on the bracket plate, and the sealing assembly includes four U-shaped plates fixedly mounted on the bracket plate and a storage groove arranged inside the sleeve, an air storage pipe is fixedly mounted on the inner bottom of the U-shaped plate, a push rod is movably connected to the air storage pipe, a lower pressure plate is fixedly mounted on the top of the push rod, and the position of the lower pressure plate is below the first cross plate.

[0014] Preferably, an extrusion airbag is fixedly connected to the inner side of the storage groove, and an air outlet of the air storage pipe is fixedly connected to a ventilation hose. An end of the ventilation hose away from the air storage pipe extends to the interior of the storage groove and is connected to the extrusion airbag.

[0015] Preferably, the lower pressure plate is movably connected with a positioning slide rod, the top end of the positioning slide rod is fixedly connected with a baffle plate, the bottom end of the positioning slide rod is fixedly mounted on the U-shaped plate, the lower end surface of the baffle plate is fixedly mounted with a tension spring, the end of the tension spring away from the baffle plate is fixedly connected to the lower pressure plate, and the tension spring is positioned on the outside of the positioning slide rod.

[0016] Preferably, the cleaning assembly includes a second cross plate fixedly mounted on the connecting rod, the four ends of the second cross plate are fixedly mounted with convex frame plates, the inner side surface of the convex frame plate is fixedly mounted with a brush, and the dust on the grid plate is cleaned by the brush, and the side end surface of the bracket plate is provided with a lifting groove used in conjunction with the second cross plate, and the second cross plate is slidably connected to the lifting groove.

[0017] Preferably, the driving assembly includes a motor and a circular frame plate fixedly mounted on a support plate, the motor is located on the inner side of the circular frame plate, the inner side surface of the circular frame plate is provided with an annular groove for use with the circular plate, the circular plate is movably connected to the annular groove, and the output shaft of the motor is fixedly mounted on the lower end surface of the circular plate.

[0018] The present invention provides an energy feedback inverter testing device. Compared with the prior art, it has the following beneficial effects:

[0019] 1. In the present invention, when the frequency converters in the four detection boxes are tested under high pressure, low pressure, high temperature and low temperature respectively, the first cross plate on the connecting rod is driven to rise by the hydraulic cylinder in the adjustment component, and the four sleeves are separated from the four detection boxes respectively by the first cross plate, and then the circular plate is driven by the motor in the driving component to rotate three times by 90 degrees on the circular frame plate. After each rotation of 90 degrees, the raised sleeve is re-sleeved on the connecting pipe through the adjustment component, so that the frequency converter in the detection box can be tested in different environments, thereby improving the test effect of the test equipment on the frequency converter, and also improving the test efficiency and accuracy, and reducing the labor intensity;

[0020] 2. In the present invention, when the sleeve is sleeved on the connecting pipe, the bearing is used to cooperate with the external thread on the connecting pipe and the internal thread inside the sleeve, so that the connecting pipe and the sleeve are fastened together, and the sealing between the two is also improved, effectively ensuring the accuracy and reliability of the detection results;

[0021] 3. In the present invention, when the first cross plate descends to a certain height, the first cross plate will push the lower pressure plate to move downward, and when the lower pressure plate descends, it will synchronously drive the piston on the push rod to move in the gas storage pipe, and the gas in the gas storage pipe will enter the extrusion airbag through the ventilation hose, and the extrusion airbag will swell in the storage groove, and the extrusion airbag will be closely attached to the connecting pipe, further improving the sealing between the sleeve and the connecting pipe, and ensuring the accuracy of the inverter during detection;

[0022] 4. In the present invention, when the hydraulic cylinder drives the connecting rod to descend, the connecting rod will synchronously drive the second cross plate to descend, and the convex frame plate on the second cross plate will synchronously drive the brush to move downward on the grid plate. The brush is used to clean the dust on the grid plate, effectively preventing the dust from clogging the protective box and affecting the normal use of the booster pump, vacuum pump, heater and cooling air compressor, thereby improving the detection effect of the frequency converter. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 It is a structural schematic diagram of the detection box and the protection box of the present invention;

[0025] Figure 3 It is a schematic diagram of the structure of the circular plate of the present invention;

[0026] Figure 4 is a schematic structural diagram of the second cross plate in the present invention;

[0027] Figure 5 is a schematic structural diagram of the first cross plate in the present invention;

[0028] Figure 6 is a cross-sectional view of the first cross plate of the present invention;

[0029] Figure 7 It is a structural schematic diagram of the sealing component in the present invention;

[0030] Figure 8 is a cross-sectional view of the sleeve in the present invention;

[0031] Fig. 9 It is a cross-sectional view of the circular frame plate in the present invention.

[0032] In the figure: 1. support plate; 2. circular plate; 3. detection box; 4. protection box; 5. box door; 6. grid plate; 7. booster pump; 8. vacuum pump; 9. heater; 10. cooling air compressor; 11. output pipe; 12. connecting pipe; 13. telescopic hose; 14. bracket plate; 15. hydraulic cylinder; 16. connecting rod; 17. first cross plate; 18. bearing; 19. sleeve; 20. through pipe; 21. internal thread; 22. external thread; 23. U-shaped plate; 24. storage groove; 25. air storage pipe; 26. push rod; 27. lower pressure plate; 28. extrusion airbag; 29. ​​ventilation hose; 30. positioning slide bar; 31. baffle; 32. tension spring; 33. second cross plate; 34. embossed frame plate; 35. brush; 36. lifting groove; 37. motor; 38. circular frame plate; 39. annular groove. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] Example 1: Please refer to Figure 1-9 The present invention is an energy feedback type inverter test equipment, including a support plate 1, characterized in that: a driving assembly is arranged on the support plate 1, a circular plate 2 is arranged on the driving assembly, four detection boxes 3 are fixedly installed on the upper end surface of the circular plate 2, four protection boxes 4 are fixedly installed on the support plate 1 and on the outside of the driving assembly, a box door 5 is arranged on the front surface of the protection box 4, a grid plate 6 is opened on the box door 5, and a cleaning assembly is arranged on the outside of the grid plate 6, the driving assembly includes a motor 37 and a circular frame plate 38 fixedly installed on the support plate 1, the position of the motor 37 is located on the inner side of the circular frame plate 38, the inner side surface of the circular frame plate 38 is opened with an annular groove 39 used in conjunction with the circular plate 2, and the circular plate 2 is movably connected to the annular groove 39 The output shaft of the motor 37 is fixedly mounted on the lower end surface of the circular plate 2, wherein a clamping mechanism may be provided inside the detection box 3, wherein the clamping mechanism comprises electric push rods fixedly mounted on both sides of the detection box 3, and the output ends of the electric push rods are fixedly connected with clamping plates, and the clamping plates are located inside the detection box 3, and the position of the frequency converter is fixed by the two clamping plates to ensure the stability of the frequency converter inside the detection box 3 when the detection box 3 is rotating. Since the clamping mechanism is a technology well known to those skilled in the art, it will not be described in detail here, wherein a double door is provided on the detection box 3, and the double door is used to facilitate the placement of the frequency converter into the detection box 3, and a sealing strip is provided at the connection of the double door to ensure the sealing of the detection box 3;

[0035] The four protection boxes 4 are respectively provided with a booster pump 7, a vacuum pump 8, a heater 9 and a cooling air compressor 10 inside. The protection box 4 is provided with a connecting component, and the four detection boxes 3 are connected with the four protection boxes 4 in sequence through the connecting component. Among them, the booster pump 7, the vacuum pump 8, the heater 9 and the cooling air compressor 10 are technologies well known to people in this field, and their working principles are not described in detail here.

[0036] The connecting assembly includes an output pipe 11 fixedly connected to the protection box 4 and a connecting pipe 12 fixedly connected to the detection box 3. The end of the output pipe 11 away from the protection box 4 is fixedly connected with a telescopic hose 13. The end of the telescopic hose 13 away from the output pipe 11 is provided with an adjustment assembly. The adjustment assembly includes a bracket plate 14 fixedly installed on four protection boxes 4. A hydraulic cylinder 15 is fixedly installed on the bracket plate 14. A connecting rod 16 is fixedly connected to the output end of the hydraulic cylinder 15. A first cross plate 17 is fixedly installed at the bottom end of the connecting rod 16. Four bearings 18 are fixedly installed on the lower end surface of the first cross plate 17. A sleeve 19 is fixedly installed on the bearing 18 The side end face of the sleeve 19 is fixedly connected with a through pipe 20, and the through pipe 20 is fixedly connected with the telescopic hose 13, and is sleeved on the connecting pipe 12 through the sleeve 19. The inner side face of the sleeve 19 is provided with an internal thread 21, and the outer side face of the connecting pipe 12 is provided with an external thread 22. The sleeve 19 and the connecting pipe 12 are connected through the internal thread 21 and the external thread 22. The telescopic hose 13 ensures that the sleeve 19 can be height-adjusted so that it will not affect the connection between the sleeve 19 and the protective box 4. A valve is provided on the output pipe 11 to avoid backflow on the output pipe 11. Since the valve is a technology well known to people in this field, it is not specifically drawn in the figure.

[0037] In this embodiment, when the frequency converters in the four detection boxes 3 complete the test under high pressure, low pressure, high temperature and low temperature respectively, the first cross plate 17 on the connecting rod 16 is driven to rise by the hydraulic cylinder 15 in the adjustment component, and the four sleeves 19 are separated from the four detection boxes 3 respectively by the first cross plate 17, and then the circular plate 2 is driven by the motor 37 in the driving component to rotate three times by ninety degrees on the circular frame plate 38. After each rotation of ninety degrees, the raised sleeve 19 is re-sleeved on the connecting pipe 12 by the adjustment component, so that the frequency converters in the detection box 3 are tested in different environments, the test effect of the test equipment on the frequency converter is improved, and the test efficiency and accuracy are also improved, and the labor intensity is reduced. When the sleeve 19 is sleeved on the connecting pipe 12, the outer thread 22 on the connecting pipe 12 is used in conjunction with the inner thread 21 inside the sleeve 19 while the bearing 18 is used, so that the connecting pipe 12 and the sleeve 19 are fastened together, and the sealing between the two is also improved, effectively ensuring the accuracy and reliability of the test results.

[0038] Example 2: Please refer to Figure 1-9 On the basis of the first embodiment, a sealing assembly is provided on the bracket plate 14, and the sealing assembly includes four U-shaped plates 23 fixedly mounted on the bracket plate 14 and a storage groove 24 arranged inside the sleeve 19, an air storage pipe 25 is fixedly mounted on the inner bottom of the U-shaped plate 23, a push rod 26 is movably connected to the air storage pipe 25, a lower pressure plate 27 is fixedly mounted on the top of the push rod 26, and the position of the lower pressure plate 27 is below the first cross plate 17, an extrusion air bag 28 is fixedly connected to the inner side of the storage groove 24, and an air outlet of the air storage pipe 25 is fixedly connected to a ventilation hose 29, and one end of the ventilation hose 29 away from the air storage pipe 25 extends to the inside of the storage groove 24 and is connected to the extrusion air bag 28, and the lower pressure plate 2 7 is movably connected with a positioning slide bar 30, the top of the positioning slide bar 30 is fixedly connected with a baffle plate 31, the bottom end of the positioning slide bar 30 is fixedly installed on the U-shaped plate 23, and the lower end surface of the baffle plate 31 is fixedly installed with a tension spring 32, and the end of the tension spring 32 away from the baffle plate 31 is fixedly connected to the lower pressure plate 27, and the position of the tension spring 32 is on the outside of the positioning slide bar 30, wherein the bottom end of the push rod 26 is fixedly connected with a piston, because the piston is a technology well known to those skilled in the art, it is not drawn in the figure, and at the same time, when the lower pressure plate 27 is not pushed by the first cross plate 17, the lower pressure plate 27 will be pulled by the tension of the tension spring 32 to return to its original position, and the gas in the squeezed airbag 28 will automatically return to the gas storage pipe 25.

[0039] In this embodiment, when the first cross plate 17 descends to a certain height, the first cross plate 17 will push the lower pressure plate 27 to move downward. When the lower pressure plate 27 descends, it will synchronously drive the piston on the push rod 26 to move in the air storage pipe 25. The gas in the air storage pipe 25 will enter the extrusion airbag 28 through the ventilation hose 29. The extrusion airbag 28 will bulge in the storage groove 24, and the extrusion airbag 28 will be tightly attached to the connecting pipe 12, thereby further improving the sealing between the sleeve 19 and the connecting pipe 12, thereby ensuring the accuracy of the inverter during detection.

[0040] Example 3: Please refer to Figure 1-9 On the basis of the first embodiment, the cleaning assembly includes a second cross plate 33 fixedly mounted on the connecting rod 16, and the four ends of the second cross plate 33 are fixedly mounted with convex frame plates 34, and the inner side of the convex frame plate 34 is fixedly mounted with a brush 35, and the dust on the grid plate 6 is cleaned by the brush 35. The side end surface of the bracket plate 14 is provided with a lifting groove 36 used in conjunction with the second cross plate 33, and the second cross plate 33 is slidably connected to the lifting groove 36.

[0041] In this embodiment, when the hydraulic cylinder 15 drives the connecting rod 16 to descend, the connecting rod 16 will synchronously drive the second cross plate 33 to descend, and the convex frame plate 34 on the second cross plate 33 will synchronously drive the brush 35 to move downward on the grid plate 6. The brush 35 is used to clean the dust on the grid plate 6, effectively preventing the dust from clogging the protective box 4 and affecting the normal use of the boost pump 7, the vacuum pump 8, the heater 9 and the cooling air compressor 10, thereby improving the detection effect of the inverter.

[0042] Working principle:

[0043] When in use, the double doors of the detection box 3 are opened, and then four frequency converters are placed inside the detection box 3, which are clamped and fixed by a clamping mechanism, and then the circular disk is driven by the motor 37 to rotate 45 degrees, so that the detection box 3 and the protection box 4 are in the same straight line, and then the first cross plate 17 on the connecting rod 16 is driven by the hydraulic cylinder 15, so that the sleeve 19 on the first cross plate 17 is sleeved on the connecting pipe 12, and the booster pump 7, the vacuum pump 8, the heater 9 and the cooling air compressor 10 are started respectively, and the frequency converters in the four detection boxes 3 are respectively placed in a high-pressure environment, a low-pressure environment, a high-temperature environment and a low-temperature environment for testing through the coordinated use of the output pipe 11, the connecting pipe 12 and the telescopic hose 13;

[0044] When the sleeve 19 is sleeved on the connecting pipe 12, the outer thread 22 on the connecting pipe 12 is used in conjunction with the inner thread 21 inside the sleeve 19 by using the bearing 18, so that the connecting pipe 12 and the sleeve 19 are fastened together. When the first cross plate 17 is lowered to a certain height, the first cross plate 17 will push the lower pressure plate 27 to move downward, and when the lower pressure plate 27 is lowered, it will synchronously drive the piston on the push rod 26 to move in the gas storage pipe 25. The gas in the gas storage pipe 25 will enter the extrusion airbag 28 through the ventilation hose 29. The extrusion airbag 28 bulges in the storage groove 24, and the extrusion airbag 28 will be closely attached to the connecting pipe 12, thereby improving the sealing between the sleeve 19 and the connecting pipe 12 and ensuring the accuracy of the inverter during detection.

[0045] When the frequency converters in the four detection boxes 3 are tested under high pressure, low pressure, high temperature and low temperature respectively, the first cross plate 17 on the connecting rod 16 is driven to rise by the hydraulic cylinder 15, and the four sleeves 19 are separated from the four detection boxes 3 respectively by the first cross plate 17, and then the circular plate 2 is driven by the motor 37 in the driving assembly to rotate three times by ninety degrees on the circular frame plate 38. After each rotation of ninety degrees, the raised sleeve 19 is re-sleeved on the connecting pipe 12 by the adjusting assembly, and then the frequency converters in the detection boxes 3 are tested in different environments, thereby improving the test efficiency and accuracy while reducing the labor intensity;

[0046] When the hydraulic cylinder 15 drives the connecting rod 16 to descend, the connecting rod 16 will synchronously drive the second cross plate 33 to descend, and the convex frame plate 34 on the second cross plate 33 will synchronously drive the brush 35 to move downward on the grid plate 6, and the brush 35 is used to clean the dust on the grid plate 6, effectively preventing the dust from clogging the protection box 4 and affecting the normal use of the booster pump 7, the vacuum pump 8, the heater 9 and the cooling air compressor 10, thereby improving the detection effect of the inverter;

[0047] When the lower pressing plate 27 is not pushed by the first cross plate 17 , the lower pressing plate 27 will be restored to its original position by the tension of the tension spring 32 , and the gas in the squeezed airbag 28 will automatically return to the gas storage tube 25 .

[0048] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0049] While the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. An energy feedback inverter test device, comprising a support plate (1), characterized in that: The support plate (1) is provided with a driving assembly, the driving assembly is provided with a circular plate (2), and four detection boxes (3) are fixedly mounted on the upper end surface of the circular plate (2); Four protective boxes (4) are fixedly mounted on the support plate (1) and on the outside of the driving assembly, a box door (5) is provided on the front surface of the protective box (4), a mesh plate (6) is provided on the top of the box door (5), and a cleaning assembly is provided on the outside of the mesh plate (6); A booster pump (7), a vacuum pump (8), a heater (9) and a cooling air compressor (10) are respectively arranged inside the four protection boxes (4); a connecting component is arranged on the protection box (4); the four detection boxes (3) are respectively connected to the four protection boxes (4) in sequence through the connecting component; the connecting component comprises an output pipe (11) fixedly connected to the protection box (4) and a connecting pipe (12) fixedly connected to the detection box (3); one end of the output pipe (11) away from the protection box (4) is fixedly connected to a telescopic hose (13); one end of the telescopic hose (13) away from the output pipe (11) is provided with an adjusting component; the adjusting component comprises a bracket plate (14) fixedly mounted on the four protection boxes (4); a liquid A hydraulic cylinder (15), wherein the output end of the hydraulic cylinder (15) is fixedly connected to a connecting rod (16), the bottom end of the connecting rod (16) is fixedly mounted with a first cross plate (17), the lower end surface of the first cross plate (17) is fixedly mounted with four bearings (18), a sleeve (19) is fixedly mounted on the bearing (18), a side end surface of the sleeve (19) is fixedly connected with a through pipe (20), the through pipe (20) is fixedly connected with the telescopic hose (13), and is sleeved on the connecting pipe (12) through the sleeve (19), the inner side surface of the sleeve (19) is provided with an internal thread (21), the outer side surface of the connecting pipe (12) is provided with an external thread (22), and the sleeve (19) and the connecting pipe (12) are connected via the internal thread (21) and the external thread (22); The support plate (14) is provided with a sealing assembly, the sealing assembly comprising four U-shaped plates (23) fixedly mounted on the support plate (14) and a storage groove (24) arranged inside the sleeve (19), an air storage pipe (25) is fixedly mounted on the inner bottom of the U-shaped plate (23), a push rod (26) is movably connected to the air storage pipe (25), a lower pressure plate (27) is fixedly mounted on the top of the push rod (26), the lower pressure plate (27) is located below the first cross plate (17), an inner side surface of the storage groove (24) is fixedly connected to an extrusion air bag (28), and an air outlet of the air storage pipe (25) is fixedly connected to the air outlet of the air storage pipe (25). There is a ventilation hose (29), one end of the ventilation hose (29) away from the air storage pipe (25) extends to the inside of the storage groove (24) and is connected to the extrusion airbag (28), the lower pressure plate (27) is movably connected with a positioning slide bar (30), the top end of the positioning slide bar (30) is fixedly connected with a baffle (31), the bottom end of the positioning slide bar (30) is fixedly installed on the U-shaped plate (23), the lower end surface of the baffle (31) is fixedly installed with a tension spring (32), the end of the tension spring (32) away from the baffle (31) is fixedly connected to the lower pressure plate (27), and the position of the tension spring (32) is located outside the positioning slide bar (30).

2. The energy feedback inverter test equipment according to claim 1, characterized in that: The cleaning assembly comprises a second cross plate (33) fixedly mounted on a connecting rod (16); four ends of the second cross plate (33) are fixedly mounted with convex frame plates (34); an inner side surface of the convex frame plate (34) is fixedly mounted with a brush (35); dust on the grid plate (6) is cleaned by the brush (35); a side end surface of the bracket plate (14) is provided with a lifting groove (36) for use with the second cross plate (33); the second cross plate (33) is slidably connected to the lifting groove (36).

3. The energy feedback inverter test equipment according to claim 1, characterized in that: The driving assembly comprises a motor (37) and a circular frame plate (38) fixedly mounted on the support plate (1); the motor (37) is located on the inner side of the circular frame plate (38); an annular groove (39) for use with the circular plate (2) is formed on the inner side surface of the circular frame plate (38); the circular plate (2) is movably connected to the annular groove (39); and an output shaft of the motor (37) is fixedly mounted on the lower end surface of the circular plate (2).

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