A continuous circuit breaker contact wear resistance testing device

Abstract

The application discloses a kind of continuous circuit breaker contact wear resistance test equipment, it is related to circuit breaker performance test technical field, including two support seats, two described support seat between being provided with dialing assembly, the bottom of dialing assembly is provided with conveying assembly, the conveying assembly is used to convey circuit breaker, the side of support seat close to conveying assembly is provided with extrusion block, and the extrusion block is used to fix circuit breaker;Current sensor is arranged in the support seat;The support plate located above is connected with sliding sleeve and worm wheel, two described support plates located below are provided with dialing rod, and the dialing rod is in contact with the switch of circuit breaker;The wear condition of contact is detected by repeatedly continuously driving circuit breaker in the condition of closing and opening by dialing rod, so that the condition that circuit breaker contact will produce obvious wear can be obtained under the condition that circuit breaker switch is closed and opened how many times.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of circuit breaker performance testing, and particularly relates to a continuous circuit breaker contact wear resistance performance testing device. BACKGROUND

[0002] In low-voltage circuit breakers, intelligent circuit breakers and other power protection devices, current detection is a key technical link for realizing core functions such as overload protection and short-circuit protection; currently, the industry generally uses traditional electromagnetic current transformers as detection elements, which realize current signal acquisition through the principle of magnetic circuit coupling and secondary winding induction; however, with the development trend of power system intelligence and miniaturization, the inherent defects of traditional current transformers are increasingly prominent; the existing circuit breaker causes a certain wear of the contact point when the contact rod and the contact are connected and disconnected, and thus the wear resistance performance of the circuit breaker needs to be detected. SUMMARY

[0003] The present application aims to provide a continuous circuit breaker contact wear resistance performance testing device to solve the problems in the prior art.

[0004] To achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0005] A continuous circuit breaker contact wear resistance performance testing device, comprising two support seats, a shifting assembly is arranged between the two support seats, a conveying assembly is arranged at the bottom of the shifting assembly, the conveying assembly is used for conveying the circuit breaker, an extrusion block is arranged on one side of the support seat close to the conveying assembly, and the extrusion block is used for fixing the circuit breaker.

[0006] Preferably, the shifting assembly comprises a rotating shaft, support rods are symmetrically arranged on both sides of the rotating shaft, a rotating motor is arranged in the support seat, a driving shaft of the rotating motor is connected to the rotating shaft, threads are arranged on the surface of the rotating shaft, a worm gear is arranged on the rotating shaft, and the worm gear is screw driven with the rotating shaft through the threads.

[0007] When the circuit breaker is moved into position and fixed, the switch of the circuit breaker is located on one side of the shifting rod at this time, then the controller controls the rotating motor to start, the driving shaft of the rotating motor drives the rotating shaft to rotate, the rotating shaft drives the threads to rotate in the process of rotating, the threads are screw driven with the worm gear when rotating, and then the worm gear reciprocatingly moves along the axis of the rotating shaft.

[0008] Preferably, a sliding sleeve is arranged on the support rod, the sliding sleeve is in sliding connection with the support rod, a contraction set is arranged on one side of the sliding sleeve and the worm gear close to the conveying assembly, the contraction set comprises two support plates, a contraction spring and a contraction rod, and the contraction spring and the contraction rod are located between the two support plates.

[0009] The worm wheel reciprocatingly moves, the worm wheel drives the sliding sleeve to reciprocate through the contraction group, the sliding sleeve slides along the axis of the supporting rod, and the worm wheel and the two sliding sleeves support the driving rod through cooperation.

[0010] Preferably, the two supporting plates are vertically arranged, the upper supporting plate is connected with the sliding sleeve and the worm wheel, and the driving rod is arranged between the two lower supporting plates and contacts the switch of the circuit breaker.

[0011] The worm wheel and the sliding sleeve drive the contraction group to move, the contraction group drives the driving rod to move, the driving rod moves to the side close to the switch of the circuit breaker, when the driving rod contacts the switch of the circuit breaker during the movement, the driving rod can first drive the switch of the circuit breaker to rotate, so that the circuit breaker is in the closed state, at this time, the switch of the circuit breaker and the circuit breaker body are arranged at an obtuse angle, and then the driving rod continues to move and moves along the inclined surface of the switch of the circuit breaker, so that the driving rod extrudes the lower supporting plate, and then the lower supporting plate extrudes the contraction spring and the contraction rod, when the driving rod moves to the other side of the switch of the circuit breaker, the driving rod is separated from the surface of the switch of the circuit breaker, and then the driving rod moves under the reset action of the contraction spring and the contraction rod, so that the driving rod is located in the arrangement range of the switch of the circuit breaker and the circuit breaker body at an acute angle again, and then the driving rod moves under the reciprocating movement of the worm wheel, so that the driving rod reciprocally rotates the switch of the circuit breaker, the switch of the circuit breaker switches between the closed state and the open state, and then the switch of the circuit breaker drives the contact rod to continuously contact and separate from the contact, and the contact rod continuously wears the contact.

[0012] Preferably, the conveying assembly is composed of three groups of conveying belts, the conveying belt is composed of a plurality of conveying rollers and supports, the middle part of the middle conveying belt is provided with a pressing roller, the support is provided with a driving motor, the driving shaft of the driving motor is provided with a belt, and the belt is connected with the plurality of conveying rollers.

[0013] The controller controls the driving motor to start, the driving shaft of the driving motor drives the belt to drive, the belt drives the plurality of conveying rollers to rotate, the conveying rollers drive the circuit breaker to move, and the circuit breaker moves to the side close to the pressing roller along the conveying rollers.

[0014] Preferably, the bottom of the pressing roller is provided with a rotating frame, the side away from the pressing roller of the rotating frame is provided with a base, the rotating frame and the base are rotationally connected, the base is provided with an electromagnet, and the rotating frame is provided with a magnet.

[0015] When the circuit breaker moves above the base, the controller controls the electromagnet in the base to be electrified, and the electromagnet generates magnetic force after being electrified. Since the rotating frame is provided with a magnet, the magnetic poles of the magnet in the rotating frame are opposite to the magnetic poles of the electromagnet, so that the rotating frame rotates away from the base. In the process of rotating, the rotating frame drives the extrusion roller to rotate, and the extrusion roller rotates towards the side close to the circuit breaker. In the process of rotating, the extrusion roller contacts the bottom of the circuit breaker and realizes the fixing effect of the circuit breaker.

[0016] Preferably, the support seat is provided with a hydraulic cylinder on the side close to the extrusion block. The push rod of the hydraulic cylinder is connected to the extrusion block. The extrusion block is provided with a conductive rod on the side away from the support seat. The conductive rod extends into the wiring terminal in the circuit breaker for conduction.

[0017] When the circuit breaker moves above the extrusion roller with the conveying roller, the controller controls the hydraulic cylinder to start. The push rod of the hydraulic cylinder immediately pushes the extrusion block to move. The extrusion block moves away from the support seat. The two extrusion blocks move towards each other. In the process of moving, the extrusion block contacts the side wall of the circuit breaker and cooperates with the extrusion roller to complete the fixing of the circuit breaker. In the process of moving, the extrusion block drives the conductive rod to move, so that the conductive rod extends to the side close to the wiring terminal in the process of moving. The two conductive rods extend into the two wiring terminals respectively, so that the circuit breaker is in an electrically connected state.

[0018] Preferably, the two sides of the extrusion block are provided with limit plates. The limit plates are slidably connected with the extrusion block. The limit plates are provided with magnets on the side away from the support seat. Limit springs are arranged between the limit plates and the extrusion block.

[0019] In the process of moving of the extrusion block, the electromagnet in the base is electrified to generate magnetic force. The limit plates are provided with magnets on the side away from the support seat. In the process of moving of the extrusion block, the limit plates are driven to move. In the process of moving of the limit plates, the limit plates are affected by the magnetic force of the electromagnet. The limit plates move along the side edges of the extrusion block. The two limit plates extend to the two sides of the circuit breaker. The limit plates and the extrusion block cooperate with each other to further limit and fix the circuit breaker.

[0020] Preferably, the support seat is provided with a current sensor.

[0021] When the circuit breaker switch is in the closed state under the action of the lever, the two conductive rods will transport current as a ring in the closed circuit. The current is transported from one conductive rod to the circuit breaker and then from the circuit breaker to the other conductive rod. After the current flows, the current sensor in the support seat detects the current size in the closed circuit. The current sensor converts the current signal into an electric signal and transmits it to the controller.

[0022] When the current detected by the current sensor is in a stable state, the contact in the circuit breaker is in an unobvious wear state; if the current detected by the current sensor is small, the contact rod continuously contacts or disconnects the contact, so that the contact rod continuously wears the contact, when the contact is worn, the cross-sectional area of the contact will correspondingly become small, and then when the length and resistivity of the contact are in a constant state, the resistance of the contact will increase due to the decrease of the cross-sectional area of the contact, and then the current flowing through the contact will decrease, and when the current sensor detects that the output current obviously decreases, it indicates that the contact is worn, and then the wear condition of the contact is detected under the condition that the toggle lever repeatedly and continuously drives the circuit breaker to close and open, so that the number of times of closing and opening of the circuit breaker switch can be obtained, and the obvious wear condition of the circuit breaker contact can be obtained.

[0023] Compared with the prior art, the beneficial effects of the present application are:

[0024] When the current detected by the current sensor is in a stable state, the contact in the circuit breaker is in an unobvious wear state; if the current detected by the current sensor is small, the contact rod continuously contacts or disconnects the contact, so that the contact rod continuously wears the contact, when the contact is worn, the cross-sectional area of the contact will correspondingly become small, and then when the length and resistivity of the contact are in a constant state, the resistance of the contact will increase due to the decrease of the cross-sectional area of the contact, and then the current flowing through the contact will decrease, and when the current sensor detects that the output current obviously decreases, it indicates that the contact is worn, and then the wear condition of the contact is detected under the condition that the toggle lever repeatedly and continuously drives the circuit breaker to close and open, so that the number of times of closing and opening of the circuit breaker switch can be obtained, and the obvious wear condition of the circuit breaker contact can be obtained. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a perspective view of the present application;

[0026] Figure 2 It is a front view of the present application;

[0027] Figure 3 It is a structural schematic view of the extrusion block;

[0028] Figure 4 It is a structural schematic view of the toggle assembly;

[0029] Figure 5 It is a structural schematic view of the conveying assembly;

[0030] Figure 6 It is a front view of the conveying assembly;

[0031] In the diagram: 1. Support base; 11. Extrusion block; 12. Conductive rod; 13. Limiting plate;

[0032] 2. Actuating assembly; 21. Rotating shaft; 22. Support rod; 23. Worm gear; 24. Sliding sleeve; 25. Retraction assembly; 26. Support plate; 27. Retraction spring; 28. Retraction rod; 29. ​​Actuating rod;

[0033] 3. Conveying assembly; 31. Conveyor belt; 32. Conveying roller; 33. Extrusion roller; 34. Rotating frame; 35. Base. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Example: Figures 1-6 As shown, the present invention provides a technical solution for a continuous circuit breaker contact wear resistance testing device, including two support bases 1, a toggle assembly 2 between the two support bases 1, a conveying assembly 3 at the bottom of the toggle assembly 2, the conveying assembly 3 being used to convey the circuit breaker, and a pressing block 11 being provided on the side of the support base 1 near the conveying assembly 3, the pressing block 11 being used to fix the circuit breaker.

[0036] In one specific embodiment of the present invention, a current sensor is provided inside the support base 1.

[0037] In one specific embodiment of the present invention, a hydraulic cylinder is provided on the side of the support base 1 near the extrusion block 11, the push rod of the hydraulic cylinder is connected to the extrusion block 11, and a conductive rod 12 is provided on the side of the extrusion block 11 away from the support base 1. The conductive rod 12 extends into the terminal of the circuit breaker for conducting electricity.

[0038] In one specific embodiment of the present invention, limiting plates 13 are provided on both sides of the extrusion block 11, the limiting plates 13 are slidably connected to the extrusion block 11, a magnet is provided on the side of the limiting plate 13 away from the support base 1, and a limiting spring is provided between the limiting plate 13 and the extrusion block 11.

[0039] As a specific embodiment of the present application, the toggle assembly 2 comprises a rotating shaft 21, the rotating shaft 21 is symmetrically provided with a support rod 22 on both sides, a rotating motor is arranged in the support base 1, the driving shaft of the rotating motor is connected with the rotating shaft 21, the surface of the rotating shaft 21 is provided with a screw thread, a worm gear 23 is arranged on the rotating shaft 21, and the worm gear 23 is screw transmission with the rotating shaft 21.

[0040] As a specific embodiment of the present application, the support rod 22 is provided with a sliding sleeve 24, the sliding sleeve 24 is slidingly connected with the support rod 22, the sliding sleeve 24 is provided with a contraction group 25 on the side close to the conveying assembly 3 of the worm gear 23, the contraction group 25 is composed of two support plates 26, a contraction spring 27 and a contraction rod 28, and the contraction spring 27 and the contraction rod 28 are located between the two support plates 26.

[0041] As a specific embodiment of the present application, the two support plates 26 are vertically arranged, the upper support plate 26 is connected with the sliding sleeve 24 and the worm gear 23, and the toggle rod 29 is arranged between the two lower support plates 26 and is in contact with the switch of the circuit breaker.

[0042] As a specific embodiment of the present application, the conveying assembly 3 is composed of three groups of conveying belts 31, the conveying belt 31 is composed of a plurality of conveying rollers 32 and a support, a pressing roller 33 is arranged in the middle of the middle conveying belt 31, a driving motor is arranged in the support, a belt is arranged on the driving shaft of the driving motor, and the belt is connected with the plurality of conveying rollers 32.

[0043] As a specific embodiment of the present application, the pressing roller 33 is provided with a rotating frame 34 at the bottom, the rotating frame 34 is provided with a base 35 away from the pressing roller 33, the rotating frame 34 is rotationally connected with the base 35, an electromagnet is arranged in the base 35, and a magnet is arranged in the rotating frame 34.

[0044] The working principle of the present application is as follows:

[0045] The controller controls the driving motor to start, the driving shaft of the driving motor drives the belt transmission, the belt drives the plurality of conveying rollers 32 to rotate, so that the conveying rollers 32 drive the circuit breaker to move, and the circuit breaker moves to the side close to the pressing roller 33 along the conveying rollers 32;

[0046] When the circuit breaker moves to the upper side of the extrusion roller 33, the controller controls the hydraulic cylinder to start, and the push rod of the hydraulic cylinder pushes the extrusion block 11 to move, and the two extrusion blocks 11 move away from the support base 1. When the extrusion block 11 moves, it contacts the side wall of the circuit breaker and cooperates with the extrusion roller 33 to complete the fixation of the circuit breaker. During the movement of the extrusion block 11, the conductive rod 12 is moved by the extrusion block 11, so that the conductive rod 12 extends into the two terminal blocks during the movement, and the two conductive rods 12 extend into the two terminal blocks, so that the circuit breaker is in an electrically connected state.

[0047] When the circuit breaker moves to the upper side of the base 35, the controller controls the electromagnet in the base 35 to be electrified, and the electromagnet generates a magnetic force after being electrified. Since the rotating frame 34 is provided with a magnet, the magnetic pole of the magnet in the rotating frame 34 is opposite to the magnetic pole of the electromagnet, so that the rotating frame 34 rotates away from the base 35. During the rotation of the rotating frame 34, the extrusion roller 33 is rotated, and the extrusion roller 33 rotates towards the circuit breaker. During the rotation of the extrusion roller 33, the bottom of the circuit breaker is contacted and fixed.

[0048] When the extrusion block 11 moves, the electromagnet in the base 35 is electrified to generate a magnetic force, and the limiting plate 13 away from the support base 1 is provided with a magnet, so that the extrusion block 11 moves to drive the limiting plate 13 to move. During the movement of the limiting plate 13, the limiting plate 13 is affected by the magnetic force of the electromagnet, and then the limiting plate 13 moves along the side of the extrusion block 11, so that the two limiting plates 13 extend to the two sides of the circuit breaker. The limiting plate 13 and the extrusion block 11 cooperate with each other to further limit and fix the circuit breaker.

[0049] When the circuit breaker is fixed after moving to the position, the switch of the circuit breaker is located on one side of the driving rod 29, and then the controller controls the rotating motor to start. The driving shaft of the rotating motor drives the rotating shaft 21 to rotate, and the rotating shaft 21 rotates to drive the screw to rotate. During the rotation of the screw, the screw is screw driven with the worm wheel 23, and then the worm wheel 23 reciprocates along the axis of the rotating shaft 21.

[0050] During the reciprocating movement of the worm wheel 23, the worm wheel 23 drives the sliding sleeve 24 to reciprocate through the contraction group 25, and the sliding sleeve 24 slides along the axis of the supporting rod 22, so that the worm wheel 23 and the two sliding sleeves 24 cooperate to support the driving rod 29.

[0051] The worm gear 23 and the sliding sleeve 24 drive the contraction group 25 to move, and the contraction group 25 drives the toggle lever 29 to move, and the toggle lever 29 moves to the side close to the circuit breaker switch. When the toggle lever 29 contacts the circuit breaker switch during movement, the circuit breaker switch is first arranged at an acute angle with the circuit breaker body, and the toggle lever 29 is located in the range of the acute angle, so that the toggle lever 29 can push the circuit breaker switch to rotate, so that the circuit breaker is in the closed state. At this time, the circuit breaker switch is arranged at an obtuse angle with the circuit breaker body, and when the toggle lever 29 continues to move, it will move along the inclined surface of the circuit breaker switch, so that the toggle lever 29 extrudes the supporting plate 26 located below, and the supporting plate 26 located below extrudes the contraction spring 27 and the contraction rod 28. When the toggle lever 29 moves to the other side of the circuit breaker switch, the toggle lever 29 is separated from the surface of the circuit breaker switch, and the toggle lever 29 moves under the reset action of the contraction spring 27 and the contraction rod 28, so that the toggle lever 29 is located again in the arrangement range of the circuit breaker switch and the circuit breaker body at an acute angle. The toggle lever 29 moves under the reciprocating movement of the worm gear 23, so that the toggle lever 29 reciprocally rotates the circuit breaker switch, so that the circuit breaker switch switches between the closed and open states, and the contact rod continuously contacts and separates from the contact, and the contact rod continuously wears the contact.

[0052] When the circuit breaker switch is in the closed state under the action of the toggle lever 29, the two conductive rods 12 will deliver current to the circuit breaker as a ring in the closed circuit, and the current will be delivered from one of the conductive rods 12 to the circuit breaker and then from the circuit breaker to the other conductive rod 12. After the current flows, the current sensor in the supporting seat 1 detects the current size in the closed circuit, and the current sensor converts the current signal into an electrical signal and transmits it to the controller.

[0053] When the current size detected by the current sensor is in a stable state, the contact in the circuit breaker is in an unobvious wear state. If the current detected by the current sensor is small, the contact rod continuously contacts or disconnects the contact, so that the contact rod continuously wears the contact. When the contact is worn, the cross-sectional area of the contact will correspondingly decrease, so that the resistance of the contact will increase when the length and resistivity of the contact are constant, and the current flowing through the contact will decrease. When the current sensor detects that the output current decreases significantly, it indicates that the contact is worn, and the wear of the contact is detected by repeatedly and continuously driving the circuit breaker to close and open through the toggle lever 29. Therefore, the number of times the circuit breaker switch is closed and opened can be obtained, and the circuit breaker contact will be significantly worn.

[0054] It will be apparent to those skilled in the art that the application is not limited to the details of the above-exemplified embodiments and that the present application can be implemented in other particular forms without departing from the spirit or essential characteristics of the present application. The embodiments should therefore be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the above description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. No reference signs in the claims should be considered as limiting the scope of the claims with respect to the figures of the patent document.

Claims

1. A continuous circuit breaker contact wear performance testing apparatus, characterized by: The utility model provides a kind of circuit breaker conveying device, including two support seats (1), two the support seat (1) between being provided with dialing assembly (2), the bottom of dialing assembly (2) is provided with conveying assembly (3), conveying assembly (3) is used to convey circuit breaker, the side of support seat (1) close to conveying assembly (3) is provided with extrusion block (11), and extrusion block (11) is used to fix circuit breaker; The dialing assembly (2) includes a rotating shaft (21), and the two sides of the rotating shaft (21) are symmetrically provided with support rods (22). A rotating motor is arranged in the support seat (1), and a drive shaft of the rotating motor is connected to the rotating shaft (21). The surface of the rotating shaft (21) is provided with threads. A worm gear (23) is arranged on the rotating shaft (21) and is in screw transmission with the rotating shaft (21) through threads. The support rod (22) is provided with a sliding sleeve (24), and the sliding sleeve (24) is in sliding connection with the support rod (22). The side of the sliding sleeve (24) and the worm gear (23) close to the conveying assembly (3) is provided with a contraction group (25). The contraction group (25) is composed of two support plates (26), a contraction spring (27), and a contraction rod (28). The contraction spring (27) and the contraction rod (28) are located between the two support plates (26). The two support plates (26) are arranged vertically above and below. The upper support plate (26) is connected with the sliding sleeve (24) and the worm gear (23). The two lower support plates (26) are provided with a dialing rod (29) therebetween. The dialing rod (29) is in contact with the switch of the circuit breaker. The side of the extrusion block (11) away from the support seat (1) is provided with a conductive rod (12). The conductive rod (12) extends into the terminal of the circuit breaker for conducting electricity. A current sensor is arranged in the support seat (1).

2. The continuous circuit breaker contact wear performance testing apparatus of claim 1, wherein: The conveying assembly (3) is composed of three groups of conveying belts (31). The conveying belt (31) is composed of a plurality of conveying rollers (32) and a support. The middle part of the middle conveying belt (31) is provided with an extrusion roller (33). A drive motor is arranged in the support. A belt is arranged on the drive shaft of the drive motor. The belt is connected with the plurality of conveying rollers (32).

3. The continuous circuit breaker contact wear performance testing apparatus of claim 2, wherein: The bottom of the extrusion roller (33) is provided with a rotating frame (34). The side of the rotating frame (34) away from the extrusion roller (33) is provided with a base (35). The rotating frame (34) is in rotational connection with the base (35). The base (35) is provided with an electromagnet. The rotating frame (34) is provided with a magnet.

4. The continuous circuit breaker contact wear performance testing apparatus of claim 1, wherein: The side of the support seat (1) close to the extrusion block (11) is provided with a hydraulic cylinder. The push rod of the hydraulic cylinder is connected with the extrusion block (11).

5. The continuous circuit breaker contact wear performance testing apparatus of claim 4, wherein: The two sides of the extrusion block (11) are provided with limit plates (13). The limit plates (13) are in sliding connection with the extrusion block (11). The side of the limit plate (13) away from the support seat (1) is provided with a magnet. A limit spring is arranged between the limit plate (13) and the extrusion block (11).

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