A withstand voltage testing device for bolt-type capacitors with a limit function

Abstract

The present invention discloses a withstand voltage testing device for bolt-type capacitors with a limit function, which relates to the technical field of withstand voltage testing devices for bolt-type capacitors. It includes a housing, in which a current collecting cylinder is installed. Below the current collecting cylinder, a sieve plate is installed to screen the bolt-type capacitors. A fixed shaft is installed in the middle of the sieve plate. Below the sieve plate, a plurality of conveying cylinders are installed. Below the conveying cylinders, a partition plate is installed. Below the partition plate, a cam is installed. Outside the cam, a detection cylinder is installed. Inside the detection cylinder, a first conductive plate and a second conductive plate are installed. Below the detection cylinder, a blanking pipe is connected. The blanking pipe is respectively connected to a defective product box and a non-defective product box. While the sieve plate reciprocates up and down, it rotates forward and backward. The up and down movement of the sieve plate forms rapid up and down vibration, and the forward and backward rotation of the sieve plate forms rapid left and right vibration. Through the combined vibration treatment of up and down vibration and left and right vibration, the sieve plate drives the bolt-type capacitors to vibrate rapidly, realizing the screening of bolt-type capacitors to improve the testing efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of bolt-type capacitor withstand voltage testing devices, and specifically to a bolt-type capacitor withstand voltage testing device with a limiting function. Background Art

[0002] ‌In the field of power electronic equipment manufacturing, capacitors, as core energy storage components, their withstand voltage performance is directly related to the safety and reliability of the whole machine. Traditional bolt-type capacitor withstand voltage testing devices generally adopt an open electrode structure. During testing, pressure is applied by manually tightening bolts, which is time-consuming and laborious, and the test quality is difficult to unify.

[0003] Therefore, the existing bolt-type capacitor withstand voltage testing devices mainly have the following problems: (1) It is difficult to screen bolt-type capacitors, resulting in low test efficiency, (2) The surface of bolt-type capacitors is not dust-removed, which cannot meet the test requirements. Summary of the Invention

[0004] The purpose of the present invention is to provide a bolt-type capacitor withstand voltage testing device with a limiting function to solve the problems raised in the prior art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A bolt-type capacitor withstand voltage testing device with a limiting function, including a housing. A current collector cylinder is installed inside the housing. A sieve plate is installed below the current collector cylinder. The sieve plate screens bolt-type capacitors. A fixed shaft is installed in the middle of the sieve plate. Multiple groups of conveying cylinders are installed below the sieve plate. A partition plate is installed below the conveying cylinders. A cam is installed below the partition plate. A detection cylinder is installed outside the cam. A first conductive plate and a second conductive plate are installed inside the detection cylinder. A blanking pipe is connected below the detection cylinder. The blanking pipe is respectively connected to a defective product box and a non-defective product box.

[0006] The partition plate is arranged on the housing. The fixed shaft is vertically arranged on the partition plate. A following cylinder is rotatably installed on the lower side of the sieve plate through a bearing. A circular groove is arranged in the middle of the sieve plate. Multiple groups of current-carrying grooves are arranged on the sieve plate outside the circular groove. The sizes of the multiple groups of current-carrying grooves are adapted to the sizes of bolt-type capacitors. Multiple groups of protrusions are arranged on the circumference of the sieve plate;

[0007] Multiple groups of sliding shafts are arranged on the circular groove. A sliding groove is arranged on the fixed shaft. The sliding shafts and the sliding groove are both spirally distributed. A lifting spring is connected between the following cylinder and the fixed shaft. The lifting spring is sleeved on the fixed shaft. Both ends of the lifting spring are electrically connected to the control system.

[0008] On the housing outside the sieve plate, multiple groups of dust collection covers are provided. The inside of the dust collection cover is hollow. A dust collection rod is slidably installed inside the dust collection cover. The cross-section of the dust collection rod is in a "T" shape. One end of the dust collection rod passes through the dust collection cover and abuts against the protrusion on the sieve plate. A sliding seal connection is formed between the dust collection rod and the inner wall of the dust collection cover. A return spring is connected between the dust collection rod and the dust collection cover, and the return spring is sleeved on the dust collection rod;

[0009] A filter plate is provided in the middle of the dust collection cover. A filter flow channel is provided inside the filter plate. The filter flow channel is distributed in a planar spiral. An air inlet and a communication port are sequentially provided on one side of the filter plate. An air outlet is provided on the other side of the filter plate. The air inlet, the air outlet, and the communication port are all communicated with the filter flow channel. A sieve mesh is provided in the air outlet, and the sieve mesh prevents dust from leaving the filter flow channel.

[0010] The flow collecting cylinder is arranged on the housing. Multiple groups of negative pressure cylinders are provided on the flow collecting cylinder. An air suction port and an exhaust port are provided on the dust collection cover. One end of the air suction port is connected to the air inlet through a hose, and the other end of the air suction port is connected to the negative pressure cylinder through a pipeline. The exhaust port penetrates through the housing and communicates with the external atmosphere. A relief valve is provided on the dust collection cover on one side of the dust collection rod, and the outlet of the relief valve is communicated with the external atmosphere through a pipeline passing through the housing;

[0011] One-way valves and flow meters are installed in the air suction port, the air inlet, the communication port, and the exhaust port.

[0012] The inside of the conveying cylinder is hollow. The upper side of the conveying cylinder is installed on the partition plate. The lower sides of multiple groups of the conveying cylinders are installed on the housing through a support plate. The support plate is arranged on the housing. A proximity switch is provided on the inner wall of the conveying cylinder, and the proximity switch is electrically connected to the control system. Two electric plug valves are sequentially installed in the conveying cylinder, and the two electric plug valves are electrically connected to the control system.

[0013] The lower end of the cam is connected to the output shaft of the driving motor. The driving motor is installed at the bottom of the housing. Several protrusions are provided on the circumference of the cam. The blanking pipe is a two-way pipe;

[0014] The upper and lower ends of the detection cylinder are respectively provided with a feed inlet and a discharge outlet. The feed inlet is communicated with the conveying cylinder. Another group of plug valves is installed in the discharge outlet. One end of the discharge outlet is connected to a blanking pipe, and the other end of the blanking pipe is respectively connected to a defective product box and a non-defective product box. The defective product box and the non-defective product box are installed on the housing. A switching valve is installed in the blanking pipe, and the switching valve is electrically connected to the control system. A plurality of groups of detection cylinders are provided, and the plurality of groups of detection cylinders are installed on the partition plate. A first pressing plate and a second pressing plate are installed in the detection cylinder. The first pressing plate and the second pressing plate are arranged in a mirror image. The first pressing plate is installed on the detection cylinder, and the second pressing plate is slidably installed on the detection cylinder. The first pressing plate and the second pressing plate are both connected to the detection cylinder through a first spring. One end of the second pressing plate passes through the detection cylinder and abuts against the protrusion on the cam.

[0015] A plurality of groups of telescopic shafts are arranged on the opposite sides of the first pressing plate and the second pressing plate. The telescopic shafts are of a telescopic structure. A first conductive plate is arranged at one end of the telescopic shaft on the first pressing plate, and a second conductive plate is arranged at one end of the telescopic shaft on the second pressing plate. The first conductive plate and the second conductive plate are electrically connected to the control system;

[0016] A second spring is connected between the first pressing plate and the first conductive plate, and a third spring is connected between the second pressing plate and the second conductive plate.

[0017] The two sides of the first conductive plate and the second conductive plate are respectively made of a metal material and an insulating material. The metal materials on the first conductive plate and the second conductive plate are electrically connected to the control system. A plurality of groups of first sensors are installed on the first pressing plate and the second pressing plate. The first sensors are used to detect the displacement of the first conductive plate and the second conductive plate.

[0018] A displacement sensor and an encoder are installed on the fixed shaft. The displacement sensor is used to detect the position of the sieve plate, and the encoder is used to detect the rotation angle of the sieve plate.

[0019] A control panel is arranged on the housing, and a control system is arranged in the control panel.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] 1. Automatic screening and processing of bolt-type capacitors to improve the test efficiency. Through the lifting spring, continuous power-on and power-off are carried out with a period T, so as to realize the reciprocating up and down movement of the sieve plate while rotating forward and backward. The up and down movement of the sieve plate forms rapid up and down vibration, and the forward and reverse rotation of the sieve plate forms rapid left and right vibration. Through the combination of up and down vibration and left and right vibration, a combined vibration treatment is formed, so that the sieve plate drives the bolt-type capacitors to vibrate rapidly, and then the bolt-type capacitors can fall from the overcurrent groove faster, realizing the screening of the bolt-type capacitors and improving the test efficiency.

[0022] 2. Dust removal treatment on the surface of the bolt-type capacitor to ensure the uniformity of test quality. The dust on the surface of the bolt-type capacitor and the surrounding air are sucked into the negative pressure cylinder. The dust and air enter the air inlet through the negative pressure cylinder, pipeline, air suction port and hose. The dust and air enter the filter flow channel through the air inlet. Since the filter flow channel is distributed in a planar thread pattern, and the dust and air have different inertial forces, the dust and air continuously flow in the filter flow channel. The dust hits the inner wall of the filter flow channel and loses its power, and then the dust is deposited in the filter flow channel. The air is filtered by the screen in the air outlet and then sucked into the first chamber, thereby realizing the separation treatment of air and dust. While the bolt-type capacitor vibrates, dust removal treatment is carried out. When the bolt-type capacitor vibrates, the dust will be vibrated synchronously, causing the dust to disperse everywhere, so as to facilitate the adsorption by the negative pressure cylinder. It can adsorb the dust while turning over the bolt-type capacitor, avoiding the adverse impact of dust on the withstand voltage test of the bolt-type capacitor.

[0023] 3. Classify and process qualified and unqualified products for further processing. When the bolt-type capacitor is unqualified, the control system closes the switching valve between the blanking pipe and the good product box, opens the switching valve between the blanking pipe and the defective product box, and stops the working of the flap valve in the detection cylinder, so that the bolt-type capacitor falls from the discharge port of the detection cylinder. The bolt-type capacitor enters the defective product box through the discharge port and the blanking pipe, so as to realize the separate collection of the bolt-type capacitor for further processing. Description of the Drawings

[0024] Figure 1 is the structural schematic diagram of the whole invention;

[0025] Figure 2 is the structural schematic diagram of the negative pressure cylinder in the invention;

[0026] Figure 3 is the structural schematic diagram of the current collecting cylinder in the invention;

[0027] Figure 4 is the structural schematic diagram of the driving motor in the invention;

[0028] Figure 5 is the structural schematic diagram of the dust collecting hood in the invention;

[0029] Figure 6 is the structural schematic diagram of the follower cylinder in the invention;

[0030] Figure 7 is the structural schematic diagram of the fixed shaft in the invention;

[0031] Figure 8 is the structural schematic diagram of the filter plate in the invention;

[0032] Figure 9It is a schematic structural diagram of the dust collecting rod in the present invention;

[0033] Figure 10 It is a schematic structural diagram of the cam in the present invention;

[0034] Figure 11 It is Figure 10 a partial enlarged view of area A in

[0035] Figure 12 It is Figure 10 a partial enlarged view of area B in

[0036] Figure 13 It is a schematic structural diagram of the sieve plate in the present invention.

[0037] In the figure: 1, control panel; 11, housing; 111, partition; 12, current collecting cylinder; 13, sieve plate; 131, following cylinder; 132, lifting spring; 133, sliding shaft; 134, sliding groove; 14, fixed shaft; 15, conveying cylinder; 16, cam; 161, driving motor; 17, detection cylinder; 171, first conductive plate; 172, second conductive plate; 173, first pressing plate; 174, second pressing plate; 18, blanking pipe; 181, defective product box; 182, non-defective product box; 19, dust collecting cover; 191, dust collecting rod; 192, filter plate; 193, air inlet; 194, communication port; 195, air outlet; 196, suction port; 197, exhaust port. Specific embodiments

[0038] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0039] Embodiment: As Figures 1 - 13 shown, the present invention provides a technical solution of a bolt-type capacitor withstand voltage testing device with a limiting function, including a housing 11, a current collecting cylinder 12 is installed inside the housing 11, a sieve plate 13 is installed below the current collecting cylinder 12, the sieve plate 13 screens bolt-type capacitors, a fixed shaft 14 is installed in the middle of the sieve plate 13, multiple groups of conveying cylinders 15 are installed below the sieve plate 13, a partition 111 is installed below the conveying cylinders 15, a cam 16 is installed below the partition 111, a detection cylinder 17 is installed outside the cam 16, a first conductive plate 171 and a second conductive plate 172 are installed inside the detection cylinder 17, a blanking pipe 18 is connected below the detection cylinder 17, the blanking pipe 18 is respectively connected to a defective product box 181 and a non-defective product box 182, a control panel 1 is arranged on the housing 11, and a control system is arranged inside the control panel 1.

[0040] The partition plate 111 is arranged on the housing 11, the fixed shaft 14 is vertically arranged on the partition plate 111, a following cylinder 131 is rotatably installed on the lower side of the sieve plate 13 through a bearing, a circular groove is arranged in the middle of the sieve plate 13, and multiple groups of flow-through grooves are arranged on the sieve plate 13 outside the circular groove. The sizes of the multiple groups of flow-through grooves are mutually adapted to the sizes of the bolt-type capacitors. Multiple groups of protrusions are arranged on the circumference of the sieve plate 13; multiple groups of sliding shafts 133 are arranged on the circular groove, a sliding groove 134 is arranged on the fixed shaft 14, both the sliding shafts 133 and the sliding groove 134 are spirally distributed, a lifting spring 132 is connected between the following cylinder 131 and the fixed shaft 14, the lifting spring 132 is sleeved on the fixed shaft 14, and both ends of the lifting spring 132 are electrically connected to the control system.

[0041] Multiple groups of dust collection covers 19 are arranged on the housing 11 outside the sieve plate 13. The inside of the dust collection cover 19 is hollow. A dust collection rod 191 is slidably installed in the dust collection cover 19. The cross-section of the dust collection rod 191 is in a "T" shape. One end of the dust collection rod 191 penetrates out of the dust collection cover 19 and abuts against the protrusion on the sieve plate 13. A sliding seal connection is formed between the dust collection rod 191 and the inner wall of the dust collection cover 19. A return spring is connected between the dust collection rod 191 and the dust collection cover 19, and the return spring is sleeved on the dust collection rod 191; a filter plate 192 is arranged in the middle of the dust collection cover 19. A filter flow channel is arranged in the filter plate 192, and the filter flow channel is distributed in a planar spiral shape. An air inlet 193 and a communication port 194 are sequentially arranged on one side of the filter plate 192, and an air outlet 195 is arranged on the other side of the filter plate 192. The air inlet 193, the air outlet 195 and the communication port 194 are all communicated with the filter flow channel. A sieve mesh is arranged in the air outlet 195, and the sieve mesh prevents dust from leaving the filter flow channel; a displacement sensor and an encoder are installed on the fixed shaft 14. The displacement sensor is used to detect the position of the sieve plate 13, and the encoder is used to detect the rotation angle of the sieve plate 13.

[0042] During the forward and reverse rotation of the sieve plate 13, the protrusions on the circumference of the sieve plate 13 rotate along with it; when the protrusions on the circumference of the sieve plate 13 move away from the dust collection rod 191, the return spring is released, and the return spring pushes the dust collection rod 191 to move outwards from the dust collection cover 19. At this time, the volume of the chamber between the dust collection rod 191 and the filter plate 192 becomes larger, and this chamber is denoted as the first chamber; the volume of the chamber between the dust collection rod 191 and the dust collection cover 19 becomes smaller, and this chamber is denoted as the second chamber;

[0043] When the volume of the first chamber increases, a negative pressure is generated, causing the dust on the surface of the bolt-type capacitor and the surrounding air to be sucked into the negative pressure cylinder. The dust and air enter the intake port 193 through the negative pressure cylinder, pipeline, suction port 196, and hose. The dust and air enter the filter flow path through the intake port 193. Since the filter flow path is distributed in a planar thread pattern, and the dust and air have different inertial forces, the dust and air continuously flow in the filter flow path. The dust loses its power when it impacts the inner wall of the filter flow path, and thus the dust is deposited in the filter flow path. The air is sucked into the first chamber after being filtered by the screen in the air outlet 195, thereby realizing the separation of air and dust, and enabling the bolt-type capacitor to perform dust removal while vibrating. When the bolt-type capacitor vibrates, the dust will be vibrated synchronously, causing the dust to disperse everywhere, so as to facilitate the adsorption by the negative pressure cylinder. It can adsorb the dust while turning over the bolt-type capacitor, avoiding the adverse impact of dust on the withstand voltage test of the bolt-type capacitor;

[0044] As the dust collection rod 191 continuously moves outward from the dust collection cover 19, the air in the second chamber is pushed by the dust collection rod 191 and discharged from the air release valve and the pipeline discharging device.

[0045] As the sieve plate 13 continuously rotates forward and backward, the protrusions on the sieve plate 13 will approach the dust collection rod 191. At this time, the protrusions on the sieve plate 13 push the dust collection rod 191 to move into the dust collection cover 19. The dust collection rod 191 simultaneously compresses the return spring, the volume of the first chamber gradually decreases, the volume of the second chamber gradually increases, the air pressure in the first chamber gradually increases, and the air in the first chamber enters the filter flow path through the air outlet 195. The pressurized air pushes the dust in the filter flow path to be discharged to the external atmosphere through the communication port 194 and the exhaust port 197, realizing the cleaning treatment of the filter flow path and preventing the filter flow path from being blocked due to long-term dust accumulation. At this time, the air in the second chamber is pushed by the dust collection rod 191 and enters the second chamber from the outside.

[0046] The current collecting cylinder 12 is arranged on the housing 11, and multiple groups of negative pressure cylinders are arranged on the current collecting cylinder 12. The dust collection cover 19 is provided with a suction port 196 and an exhaust port 197. One end of the suction port 196 is connected to the intake port 193 through a hose, the other end of the suction port 196 is connected to the negative pressure cylinder through a pipeline, the exhaust port 197 communicates with the housing 11 and is connected to the external atmosphere. An air release valve is arranged on the dust collection cover 19 on one side of the dust collection rod 191, and the outlet of the air release valve passes through the housing 11 through a pipeline and is connected to the external atmosphere; One-way valves and flow meters are installed in the suction port 196, the intake port 193, the communication port 194, and the exhaust port 197.

[0047] The inside of the conveying cylinder 15 is hollow. The upper side of the conveying cylinder 15 is installed on the partition plate 111. The lower sides of multiple groups of conveying cylinders 15 are installed on the housing 11 through the support plate. The support plate is arranged on the housing 11. A proximity switch is arranged on the inner wall of the conveying cylinder 15, and the proximity switch is electrically connected to the control system. Two electric plug valves are sequentially installed in the conveying cylinder 15, and the two electric plug valves are electrically connected to the control system. When the proximity switch on the conveying cylinder 15 detects that the bolt-type capacitor enters the conveying cylinder 15, the control system controls the lower plug valve to work, blocks multiple groups of bolt-type capacitors through the lower plug valve, and makes multiple groups of capacitors unable to move downward. Then, the control system controls the upper plug valve to work, makes the upper plug valve insert into the position between two bolt-type capacitors, so that there is only one bolt-type capacitor between the two plug valves. Finally, the control system stops the lower plug valve from working and makes the lower plug valve contract, so as to realize the orderly processing of single bolt-type capacitors, avoid blockage, limit the bolt-type capacitors through the two plug valves, and then realize the sequential dropping of multiple groups of bolt-type capacitors.

[0048] The lower end of the cam 16 is connected to the output shaft of the driving motor 161. The driving motor 161 is installed at the bottom of the housing 11. Several protrusions are arranged on the circumference of the cam 16. The blanking pipe 18 is a two-way pipe. The upper end and the lower end of the detection cylinder 17 are respectively provided with a feed inlet and a discharge outlet. The feed inlet is communicated with the conveying cylinder 15. Another group of plug valves is installed in the discharge outlet. The discharge outlet is connected to one end of the blanking pipe 18. The other end of the blanking pipe 18 is respectively connected to the defective product box 181 and the qualified product box 182. The defective product box 181 and the qualified product box 182 are installed on the housing 11. A switching valve is installed in the blanking pipe 18, and the switching valve is electrically connected to the control system. Multiple groups of detection cylinders 17 are arranged. Multiple groups of detection cylinders 17 are installed on the partition plate 111. A first pressing plate 173 and a second pressing plate 174 are installed in the detection cylinder 17. The first pressing plate 173 and the second pressing plate 174 are arranged in a mirror image. The first pressing plate 173 is installed on the detection cylinder 17. The second pressing plate 174 is slidably installed on the detection cylinder 17. Both the first pressing plate 173 and the second pressing plate 174 are connected to the detection cylinder 17 through the first spring. One end of the second pressing plate 174 passes through the detection cylinder 17 and abuts against the protrusion on the cam 16.

[0049] Multiple groups of telescopic shafts are arranged on the opposite sides of the first pressing plate 173 and the second pressing plate 174. The telescopic shafts are of a telescopic structure. A first conductive plate 171 is arranged at one end of the telescopic shaft on the first pressing plate 173. A second conductive plate 172 is arranged at one end of the telescopic shaft on the second pressing plate 174. The first conductive plate 171 and the second conductive plate 172 are electrically connected to the control system. A second spring is connected between the first pressing plate 173 and the first conductive plate 171. A third spring is connected between the second pressing plate 174 and the second conductive plate 172.

[0050] The two sides of the first conductive plate 171 and the second conductive plate 172 are made of metal material and insulating material respectively. The metal materials on the first conductive plate 171 and the second conductive plate 172 are electrically connected to the control system. Multiple groups of first sensors are installed on the first pressing plate 173 and the second pressing plate 174, and the first sensors are used to detect the displacement of the first conductive plate 171 and the second conductive plate 172.

[0051] Working principle: Press the start button on the control panel 1, and the device starts. The staff place multiple groups of bolt-type capacitors on the sieve plate 13. The control system continuously powers on and off the lifting spring 132 with a period T. After the lifting spring 132 is powered on, the lifting spring 132 gradually contracts under the action of the magnetic field. The lifting spring 132 pulls the follower cylinder 131 to move downward, and the follower cylinder 131 drives the sieve plate 13 to move downward. Since the sliding shaft 133 on the sieve plate 13 is inserted into the sliding groove 134, and both the sliding groove 134 and the sliding shaft 133 are helically distributed, the sieve plate 13 rotates forward while moving downward.

[0052] When the lifting spring 132 is powered off, the lifting spring 132 pushes the follower cylinder 131 to move upward under its own elastic force. The follower cylinder 131 drives the sieve plate 13 to move upward. Since the sliding shaft 133 on the sieve plate 13 is inserted into the sliding groove 134, and both the sliding groove 134 and the sliding shaft 133 are helically distributed, the sieve plate 13 rotates backward while moving upward.

[0053] By continuously powering on and off the lifting spring 132 with a period T, the sieve plate 13 moves up and down reciprocally while rotating forward and backward. The up and down movement of the sieve plate 13 forms a rapid up and down vibration, and the forward and backward rotation of the sieve plate 13 forms a rapid left and right vibration. Through the combined vibration treatment of the up and down vibration and the left and right vibration, the sieve plate 13 drives the bolt-type capacitors to vibrate rapidly, so that the bolt-type capacitors fall from the overflow groove faster, realizing the screening of the bolt-type capacitors.

[0054] After the bolt-type capacitors fall from the overflow groove, they will fall into the conveying cylinder 15. At this time, the proximity switch on the conveying cylinder 15 feeds back the displacement data of the bolt-type capacitors to the control system. The control system blocks the bolt-type capacitors through the flap valve in the detection cylinder 17, so that the bolt-type capacitors fall on the flap valve of the detection cylinder 17 and cannot move downward from the discharge port, in order to facilitate the detection of the bolt-type capacitors.

[0055] The bolt-type capacitor moves to the flap valve of the detection cylinder 17 through the conveying cylinder 15 and the feeding port. At this time, the control system drives the cam 16 to rotate forward by a certain angle through the driving motor 161. The protrusions on the circumference of the cam 16 follow the rotation by a certain angle, so that the protrusions on the cam 16 push the second pressing plate 174 towards the first pressing plate 173. The second pressing plate 174 simultaneously stretches the first spring, and the second pressing plate 174 simultaneously drives multiple groups of second conductive plates 172 to move towards the first pressing plate 173 through multiple sets of telescopic shafts. The multiple groups of second conductive plates 172 push the bolt-type capacitor to move synchronously and contact the multiple groups of first conductive plates 171.

[0056] When the multiple groups of first conductive plates 171 and the multiple groups of second conductive plates 172 are in contact with the bolt-type capacitor, the encoder inside the driving motor 161 feeds back the rotation data of the cam 16 to the control system. The control system further drives the cam 16 to continue rotating by a certain angle through the driving motor 161, so that the protrusions on the cam 16 continue to push the second pressing plate 174 towards the first pressing plate 173, so as to reduce the distance between the first pressing plate 173 and the second pressing plate 174. The positive and negative electrodes on the bolt-type capacitor will inevitably press the two groups of first conductive plates 171 or the two groups of second conductive plates 172, causing the telescopic shafts on the two groups of first conductive plates 171 or the two groups of second conductive plates 172 to gradually contract, and the two groups of first conductive plates 171 or the two groups of second conductive plates 172 respectively compress the second spring or the third spring. The displacement sensors on one side of the two groups of first conductive plates 171 or the two groups of second conductive plates 172 feed back the displacement data to the control system. The control system connects the two groups of first conductive plates 171 or the two groups of second conductive plates 172 to the circuit, so that current enters the bolt-type capacitor through the two groups of first conductive plates 171 or the two groups of second conductive plates 172 to perform a withstand voltage test on the bolt-type capacitor.

[0057] After the bolt-type capacitor passes the withstand voltage test, the control system compares the obtained test data with the set data; when the test data does not meet the set data, the control system determines that the bolt-type capacitor is a defective product; when the test data meets the set data, the control system determines that the bolt-type capacitor is a qualified product. Then, the control system drives the cam 16 to rotate reversely by a certain angle through the driving motor 161, so that the protrusions on the cam 16 move away from the second pressing plate 174. At this time, the first spring on the second pressing plate 174 is released, and the first spring pulls the second pressing plate 174 to move away from the first pressing plate 173. The second pressing plate 174 drives multiple groups of second conductive plates 172 to move synchronously, so that the bolt-type capacitor falls from the discharge port of the detection cylinder 17 into the blanking pipe 18.

[0058] When the bolt-type capacitor is a qualified product, the control system opens the switching valve between the blanking pipe 18 and the good product box 182, closes the switching valve between the blanking pipe 18 and the defective product box 181, and stops the working of the flap valve in the detection cylinder 17, so that the bolt-type capacitor falls from the discharge port of the detection cylinder 17, and the bolt-type capacitor enters the good product box 182 through the discharge port and the blanking pipe 18;

[0059] When the bolt-type capacitor is a defective product, the control system closes the switching valve between the blanking pipe 18 and the good product box 182, opens the switching valve between the blanking pipe 18 and the defective product box 181, and stops the working of the flap valve in the detection cylinder 17, so that the bolt-type capacitor falls from the discharge port of the detection cylinder 17, and the bolt-type capacitor enters the defective product box 181 through the discharge port and the blanking pipe 18, so as to realize the separate collection of the bolt-type capacitors.

[0060] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be regarded as limiting the claimed claim.

Claims

1. A bolt-type capacitor withstand voltage test device with a limit function, characterized in that: It includes a housing (11), a current collector cylinder (12) is installed inside the housing (11), a sieve plate (13) is installed below the current collector cylinder (12), the sieve plate (13) screens bolt-type capacitors, a fixed shaft (14) is installed in the middle of the sieve plate (13), multiple conveying cylinders (15) are installed below the sieve plate (13), a partition plate (111) is installed below the conveying cylinders (15), a cam (16) is installed below the partition plate (111), a detection cylinder (17) is installed outside the cam (16), a first conductive plate (171) and a second conductive plate (172) are installed inside the detection cylinder (17), a blanking pipe (18) is connected below the detection cylinder (17), and the blanking pipe (18) is respectively connected to a defective product box (181) and a non-defective product box (182); The partition plate (111) is arranged on the housing (11), the fixed shaft (14) is vertically arranged on the partition plate (111), a following cylinder (131) is rotatably installed on the lower side of the sieve plate (13) through a bearing, a circular groove is arranged in the middle of the sieve plate (13), multiple current-carrying grooves are arranged on the sieve plate (13) outside the circular groove, the sizes of the multiple current-carrying grooves are adapted to the sizes of the bolt-type capacitors, and multiple protrusions are arranged on the circumference of the sieve plate (13); Multiple sliding shafts (133) are arranged on the circular groove, a sliding groove (134) is arranged on the fixed shaft (14), both the sliding shafts (133) and the sliding groove (134) are spirally distributed, a lifting spring (132) is connected between the following cylinder (131) and the fixed shaft (14), the lifting spring (132) is sleeved on the fixed shaft (14), and both ends of the lifting spring (132) are electrically connected to a control system; Multiple dust collection covers (19) are arranged on the housing (11) outside the sieve plate (13), the interiors of the dust collection covers (19) are hollow, a dust collection rod (191) is slidably installed inside the dust collection cover (19), the cross section of the dust collection rod (191) is in a "T" shape, one end of the dust collection rod (191) penetrates out of the dust collection cover (19) and abuts against the protrusion on the sieve plate (13), a sliding seal connection is formed between the dust collection rod (191) and the inner wall of the dust collection cover (19), and a return spring is connected between the dust collection rod (191) and the dust collection cover (19), and the return spring is sleeved on the dust collection rod (191); A filter plate (192) is arranged in the middle of the dust collection cover (19), a filter flow channel is arranged inside the filter plate (192), the filter flow channel is distributed in a planar thread shape, an air inlet (193) and a communication port (194) are sequentially arranged on one side of the filter plate (192), an air outlet (195) is arranged on the other side of the filter plate (192), the air inlet (193), the air outlet (195) and the communication port (194) are all communicated with the filter flow channel, and a sieve mesh is arranged inside the air outlet (195); The manifold (12) is provided on the housing (11). Multiple groups of negative pressure cylinders are provided on the manifold (12). An air inlet (196) and an air outlet (197) are provided on the dust collection hood (19). One end of the air inlet (196) is connected to the intake port (193) through a hose, and the other end of the air inlet (196) is connected to the negative pressure cylinder through a pipe. The air outlet (197) communicates with the housing (11) and is in communication with the external atmosphere. A relief valve is provided on the dust collection hood (19) on one side of the dust collection rod (191). The outlet of the relief valve is connected to the external atmosphere through a pipe passing through the housing (11). One-way valves and flow meters are installed in the air inlet (196), the intake port (193), the communication port (194), and the air outlet (197).

2. The voltage withstand testing device for bolt-type capacitors with a limiting function according to claim 1, characterized in that: The inside of the conveying cylinder (15) is hollow. The upper side of the conveying cylinder (15) is installed on the partition plate (111). The lower sides of multiple groups of the conveying cylinders (15) are installed on the housing (11) through a support plate. The support plate is provided on the housing (11). Proximity switches are provided on the inner wall of the conveying cylinder (15). The proximity switches are electrically connected to the control system. Two electric plug valves are sequentially installed in the conveying cylinder (15). The two electric plug valves are electrically connected to the control system.

3. The withstand voltage test device for bolt-type capacitors with a limit function according to claim 2, wherein: The lower end of the cam (16) is connected to the output shaft of the drive motor (161). The drive motor (161) is installed at the bottom of the housing (11). A number of protrusions are provided on the circumference of the cam (16). The feed pipe (18) is a two-way pipe. The upper end and the lower end of the detection cylinder (17) are respectively provided with a feed inlet and a discharge outlet. The feed inlet communicates with the conveying cylinder (15). Another plug valve is installed in the discharge outlet. The discharge outlet is connected to one end of the feed pipe (18). The other end of the feed pipe (18) is respectively connected to the defective product box (181) and the non-defective product box (182). The defective product box (181) and the non-defective product box (182) are installed on the housing (11). A switching valve is installed in the feed pipe (18). The switching valve is electrically connected to the control system. Multiple groups of the detection cylinders (17) are provided. The multiple groups of the detection cylinders (17) are installed on the partition plate (111). A first pressing plate (173) and a second pressing plate (174) are installed in the detection cylinder (17). The first pressing plate (173) and the second pressing plate (174) are arranged in a mirror image. The first pressing plate (173) is installed on the detection cylinder (17). The second pressing plate (174) is slidably installed on the detection cylinder (17). The first pressing plate (173) and the second pressing plate (174) are both connected to the detection cylinder (17) through a first spring. One end of the second pressing plate (174) passes through the detection cylinder (17) and abuts against the protrusion on the cam (16).

4. The withstand voltage testing device for bolt-type capacitors with a limiting function according to claim 3, characterized in that: On the opposite sides of the first pressing plate (173) and the second pressing plate (174), a plurality of telescopic shafts are provided. The telescopic shafts are telescopic structures. One end of the telescopic shaft on the first pressing plate (173) is provided with the first conductive plate (171), and one end of the telescopic shaft on the second pressing plate (174) is provided with the second conductive plate (172). The first conductive plate (171) and the second conductive plate (172) are electrically connected to the control system; A second spring is connected between the first pressing plate (173) and the first conductive plate (171), and a third spring is connected between the second pressing plate (174) and the second conductive plate (172).

5. The withstand voltage testing device for bolt-type capacitors with a limiting function according to claim 4, characterized in that: The two sides of the first conductive plate (171) and the second conductive plate (172) are made of metal material and insulating material respectively. The metal materials on the first conductive plate (171) and the second conductive plate (172) are electrically connected to the control system. A plurality of first sensors are installed on the first pressing plate (173) and the second pressing plate (174). The first sensors are used to detect the displacements of the first conductive plate (171) and the second conductive plate (172).

6. The withstand voltage testing device for bolt-type capacitors with a limit function according to claim 5, characterized in that: A displacement sensor and an encoder are installed on the fixed shaft (14). The displacement sensor is used to detect the position of the sieve plate (13), and the encoder is used to detect the rotation angle of the sieve plate (13).

7. The withstand voltage testing device for bolt-type capacitors with a limiting function according to claim 6, characterized in that: A control panel (1) is provided on the housing (11), and a control system is provided inside the control panel (1).

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