A test device for simulating a contact pad working condition

Abstract

The application discloses a test device for simulating the working condition of a contact piece, which comprises a radial structure, a U-shaped fixing piece and a first laser sensor. The radial structure is provided with a first pressure sensor for measuring the radial pressure of the contact piece, and the lower end of the radial structure is a T-shaped rod. The radial structure is fixedly connected with the two ends of the U-shaped fixing piece through the T-shaped rod. The first laser sensor is arranged between the T-shaped rod and the bottom of the U-shaped fixing piece, and the bottom of the U-shaped fixing piece is provided with a first observation hole corresponding to the first laser sensor. The moving contact and the stationary contact are arranged below the radial structure. The radial structure is used for applying downward pressure to the contact piece, the pressure sensor on the radial structure is used for measuring the pressure applied by the radial structure, and the laser sensor is used for measuring the micro deformation of the contact piece under the radial pressure. The moving contact and the stationary contact are used for conducting current to the contact piece, the current passing and heating conditions of the contact piece are simulated, and the measurement of the current passing capacity of the contact piece is realized.

Description

Technical Field

[0001] This invention relates to the field of contact testing fixtures, and particularly to a testing device for simulating contact working conditions. Background Technology

[0002] As a component that plays a safety protection role in high-voltage power systems, circuit breakers function to establish isolation protection between the load and the power source, and disconnect the circuit when necessary to protect electrical equipment.

[0003] The plum blossom contact is an important component of a high-voltage vacuum circuit breaker. It is a ring-shaped body composed of grids, posts, contacts, and tension springs. The grids are annular, and several contacts are assembled on the grids. Its structure and performance directly affect the operating efficiency and safety of the circuit breaker. Its design aims to provide a stable electrical connection while reducing contact resistance and heat generation, thereby ensuring reliable circuit operation.

[0004] Current testing methods for the heating and current-carrying performance of luffy contacts are typically designed with the whole device as the observation object, which is insufficient for observing the local operating conditions of the moving contact, such as the performance of a single contact piece. Since moving contacts are usually composed of several contact pieces fixed together in a ring, it is also necessary to investigate the performance of individual contact pieces. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a test device for simulating the working conditions of a contact piece, and to study the changes in the micro-deformation and current-carrying capacity of the contact piece under different contact pressures.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0007] A test device for simulating the working conditions of a contact piece includes a radial structure for radially fixing and applying pressure to the contact piece, and a moving contact and a stationary contact for energizing the contact piece.

[0008] The radial structure includes a radial lever arm, a U-shaped fastener, and a first laser sensor;

[0009] The radial lever arm is equipped with a first pressure sensor for measuring the radial pressure of the contact piece, and the lower end of the radial lever arm is a T-shaped rod;

[0010] The radial lever arm is fixedly connected to both ends of the U-shaped fastener via the T-shaped rod;

[0011] The first laser sensor is disposed between the bottom of the T-shaped rod and the bottom of the U-shaped fixing member, and the bottom of the U-shaped fixing member is provided with a first observation hole corresponding to the first laser sensor;

[0012] The moving contact and the stationary contact are arranged below the radial structure.

[0013] The application has the advantages that the test device for simulating the working condition of a contact patch of the application applies downward pressure to the contact patch through a radial structure, measures the pressure applied by the radial structure through a pressure sensor on the radial structure, and realizes the micro deformation of the contact patch under the radial pressure through a laser sensor. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 FIG. 1 is a schematic diagram of the main structure of a test device for simulating the working condition of a contact patch according to an embodiment of the application;

[0015] Figure 2 FIG. 2 is a schematic diagram of the main structure of a test device for simulating the working condition of a contact patch according to an embodiment of the application;

[0016] Figure 3 FIG. 3 is an assembly diagram of the radial structure and the fixed truss of a test device for simulating the working condition of a contact patch according to an embodiment of the application;

[0017] Figure 4 FIG. 4 is a side view of the assembly of the radial structure and the fixed truss of a test device for simulating the working condition of a contact patch according to an embodiment of the application;

[0018] Figure 5 FIG. 5 is a disassembly diagram of the radial structure of a test device for simulating the working condition of a contact patch according to an embodiment of the application;

[0019] Figure 6 FIG. 6 is an assembly diagram of the fixed truss and the laser sensor of a test device for simulating the working condition of a contact patch according to an embodiment of the application;

[0020] Figure 7 FIG. 7 is an assembly diagram of the radial structure and the axial mechanism of a test device for simulating the working condition of a contact patch according to an embodiment of the application;

[0021] Figure 8 FIG. 8 is a whole assembly diagram of a test device for simulating the working condition of a contact patch according to an embodiment of the application;

[0022] REFERENCE NUMERALS:

[0023] 1, radial structure; 2, axial structure; 3, moving contact; 4, static contact; 5, U-shaped fixing piece; 6, first laser sensor; 7, first pressure sensor; 8, radial straight rod; 9, radial spring; 10, T-shaped rod; 11, radial fixing piece; 12, first observation hole; 13, second observation hole; 14, second pressure sensor; 15, axial straight rod; 16, axial spring; 17, axial connecting rod; 18, axial fixing piece; 19, fixed truss; 20, second laser sensor; 21, fixed plate; 22, sheet metal shell; 23, conductive assembly; 24, contact patch. DETAILED DESCRIPTION

[0024] To illustrate the technical content of the present application, the purposes and effects achieved, the following embodiments are described in conjunction with the accompanying drawings.

[0025] Please refer to Figures 1 to 8 A test device for simulating the working condition of a contact patch, comprising a radial structure for radially fixing and pressing the contact patch, and a moving contact and a static contact for electrifying the contact patch;

[0026] The radial structure comprises a radial force arm, a U-shaped fixing piece, and a first laser sensor;

[0027] The radial force arm is provided with a first pressure sensor for measuring the radial pressure of the contact patch, and the lower end of the radial force arm is a T-shaped rod;

[0028] The radial force arm is fixedly connected to the two ends of the U-shaped fixing piece through the T-shaped rod;

[0029] The first laser sensor is arranged between the T-shaped rod and the bottom of the U-shaped fixing piece, and the bottom of the U-shaped fixing piece is provided with a first observation hole corresponding to the first laser sensor;

[0030] The moving contact and the static contact are arranged below the radial structure.

[0031] From the above description, the beneficial effects of the present application are as follows: the test device for simulating the working condition of a contact patch of the present application applies downward pressure to the contact patch through the radial structure, measures the pressure applied by the radial structure through the pressure sensor on the radial structure, and realizes the micro-deformation of the contact patch under radial pressure through the laser sensor; at the same time, the moving contact and the static contact can be used to conduct current to the contact patch to simulate the current conduction and heating of the contact patch, and to measure the change of the current conduction capacity.

[0032] Further, the bottom of the U-shaped fixing piece is provided with a radial fixing piece for fixing the contact patch, and the radial fixing piece is provided with a second observation hole penetrating the first observation hole.

[0033] From the above description, the radial structure is specifically fixed to the contact piece by the radial fixing piece at the bottom of the U-shaped fixing piece, and a second observation hole is provided on the radial fixing piece and penetrates the first observation hole, so that the first laser sensor can measure the micro deformation of the contact piece under radial pressure.

[0034] Further, the bottom of the radial fixing piece is provided with a slot for fixing the contact piece.

[0035] From the above description, the radial fixing piece specifically fixes the contact piece through the slot at the bottom.

[0036] Further, the radial force arm includes a radial straight rod connected to the upper and lower ends of the first pressure sensor and a T-shaped rod.

[0037] The radial straight rod is sleeved with a radial spring.

[0038] From the above description, the first pressure sensor is arranged in the radial force arm, and the two ends are connected to the radial straight rod and the T-shaped rod.

[0039] Further, the radial structure is two;

[0040] The two radial structures are parallel and have a spacing, so that the two radial structures can radially fix the head and tail of the contact piece.

[0041] From the above description, the radial structure is two, and is arranged in a spaced manner to fix and press the head and tail of the contact piece, which can better fix the contact piece and control the pressure.

[0042] Further, it also includes an axial structure for axially fixing and pressing the contact piece;

[0043] The axial structure is provided with a second pressure sensor for measuring the axial pressure of the contact piece.

[0044] From the above description, it also includes an axial structure, which presses the contact piece in the axial direction, facilitates the measurement of the micro deformation of the contact piece under axial pressure, and the axial structure is also provided with a pressure sensor, which facilitates the monitoring and adjustment of the axial pressure.

[0045] Further, the axial structure includes the second pressure sensor connection, an axial straight rod and an axial connecting rod.

[0046] One end of the axial connecting rod is connected to the second pressure sensor, and the other end is connected to the axial connecting rod.

[0047] The axial straight rod is sleeved with an axial spring.

[0048] The second pressure sensor is provided with an axial fixing part away from one end of the axial connecting rod.

[0049] The axial fixing part is provided with a one-word notch for fixing the contact piece away from one end of the second pressure sensor.

[0050] From the above description, in the axial structure, the second pressure sensor, the axial connecting rod and the axial straight rod are connected in sequence to measure the axial pressure, and the axial structure realizes the fixation of the contact piece through the one-word notch on the axial fixing part.

[0051] Further, it further comprises a fixed truss;

[0052] The fixed truss is located at the T-shaped rod and passes through the U-shaped fixing part, is connected with the U-shaped fixing part, and forms an accommodation space capable of accommodating the first laser sensor with the bottom of the U-shaped fixing part.

[0053] The fixed truss is provided with a second laser sensor at a portion exceeding the U-shaped fixing part, and the second laser sensor is inclined downward to measure the micro-deformation amount of the contact piece under axial pressure.

[0054] From the above description, the fixed truss is connected with the U-shaped fixing part and forms an accommodation space capable of accommodating the first laser sensor, and the second laser sensor is also provided and is inclined downward to measure the micro-deformation amount of the contact piece after axial pressure.

[0055] Further, it further comprises a sheet metal shell;

[0056] One end of the fixed truss is provided with a fixed plate, and the fixed plate is fixedly connected with the sheet metal shell through the fixed hole in the fixed plate.

[0057] From the above description, the sheet metal shell is further included, and the fixed truss is fixedly connected with the sheet metal shell through the fixed plates at both ends of the fixed truss.

[0058] Further, the moving contact and the stationary contact are respectively connected with conductive components.

[0059] From the above description, the moving contact and the stationary contact are respectively connected with conductive components, which facilitates current conduction.

[0060] The test device for simulating the working condition of the contact piece is suitable for researching the micro-deformation amount and the change of current passing capacity of the contact piece under different contact pressures.

[0061] Please refer to Figures 1 to 8 , the embodiment one of the present application is:

[0062] Please refer to Figure 1 , Figure 2 andFigure 8 A test device for simulating the working condition of a contact piece, comprising a radial structure 1 for radially fixing and pressing the contact piece 24, an axial structure 2 for axially fixing and pressing the contact piece 24, and a moving contact 3 and a stationary contact 4 for electrifying the contact piece 24.

[0063] Reference can be made to Figures 3 to 5 The radial structure 1 comprises a radial force arm, a U-shaped fixing member 5, and a first laser sensor 6. The radial force arm is provided with a first pressure sensor 7 for measuring the radial pressure of the contact piece 24, and the lower end of the radial force arm is a T-shaped rod 10. The radial force arm comprises a radial straight rod 8 connected to the upper and lower ends of the first pressure sensor 7, and the T-shaped rod 10. A radial spring 9 is sleeved on the radial straight rod 8. The radial force arm is fixedly connected to the two ends of the U-shaped fixing member 5 through the T-shaped rod 10. The first laser sensor 6 is arranged between the T-shaped rod 10 and the bottom of the U-shaped fixing member 5, and the bottom of the U-shaped fixing member 5 is provided with a first observation hole 12 corresponding to the first laser sensor 6. The bottom of the U-shaped fixing member 5 is provided with a radial fixing member 11 connected for fixing the contact piece 24, and the bottom of the radial fixing member 11 is provided with a slot for fixing the contact piece 24. The radial fixing member 11 is provided with a second observation hole 13 penetrating the first observation hole 12.

[0064] In this embodiment, the radial structure 1 is provided with a double-layer columnar radial fixing member 11 with a slot at the bottom end, which is used for fixing the contact piece 24 to be tested. The radial fixing member 11 is connected to the upper U-shaped fixing member 5 through a bolt, and a through hole, i.e. the first observation hole 12 and the second observation hole 13, is punched in the center of the two. The two wings of the U-shaped fixing member 5 are connected to the upper T-shaped rod 10 through fixing holes. The upper end of the first pressure sensor 7 is connected to a spring and a straight rod, which is embedded in the radial spring 9 to form an integral body. The lower end of the first pressure sensor 7 is connected to the T-shaped rod 10 structure, which can record the pressure applied to the upper end, and transmit the pressure to the T-shaped rod 10 at the lower end through the structure below. The T-shaped rod 10 is connected to the U-shaped fixing member 5 through the fixing holes, and also disperses the pressure transmitted from the upper end to the left and right sides of the U-shaped fixing member 5. Then, the pressure is transmitted to the contact piece 24 by the radial fixing member 11 at the bottom of the U-shaped fixing member 5, without affecting the laser sensor arranged on the U-shaped fixing member 5. The laser sensor measures the micro-deformation of the contact piece 24 caused by the radial contact pressure through the first observation hole 12 and the second observation hole 13.

[0065] In this embodiment, the radial structure 1 is provided with a double-layer columnar radial fixing member 11 with a slot at the bottom end, which is used for fixing the contact piece 24 to be tested. The radial fixing member 11 is connected to the upper U-shaped fixing member 5 through a bolt, and a through hole, i.e. the first observation hole 12 and the second observation hole 13, is punched in the center of the two. The two wings of the U-shaped fixing member 5 are connected to the upper T-shaped rod 10 through fixing holes. The upper end of the first pressure sensor 7 is connected to a spring and a straight rod, which is embedded in the radial spring 9 to form an integral body. The lower end of the first pressure sensor 7 is connected to the T-shaped rod 10 structure, which can record the pressure applied to the upper end, and transmit the pressure to the T-shaped rod 10 at the lower end through the structure below. The T-shaped rod 10 is connected to the U-shaped fixing member 5 through the fixing holes, and also disperses the pressure transmitted from the upper end to the left and right sides of the U-shaped fixing member 5. Then, the pressure is transmitted to the contact piece 24 by the radial fixing member 11 at the bottom of the U-shaped fixing member 5, without affecting the laser sensor arranged on the U-shaped fixing member 5. The laser sensor measures the micro-deformation of the contact piece 24 caused by the radial contact pressure through the first observation hole 12 and the second observation hole 13.

[0066] Referring to Figure 7 , the axial structure 2 is provided with a second pressure sensor 14 for measuring the axial pressure of the contact piece 24; the axial structure 2 comprises the second pressure sensor 14, an axial straight rod 15 and an axial connecting rod 17; one end of the axial connecting rod 17 is connected with the second pressure sensor 14, and the other end is connected with a device for connecting the axial connecting rod 17; the axial straight rod 15 is sleeved with an axial spring 16; one end of the second pressure sensor 14 away from the axial connecting rod 17 is provided with an axial fixing part 18; one end of the axial fixing part 18 away from the second pressure sensor 14 is provided with a one-word notch for fixing the contact piece 24.

[0067] In this embodiment, the second pressure sensor 14 is distributed in the axial direction for measuring the axial pressure value of the contact piece 24, and the second pressure sensor 14 is respectively screwed with the axial connecting rod 17 and the axial straight rod 15 at both ends, the axial straight rod 15 and the axial spring 16 are nested to form an integral whole, the pressure sensor transmits the pressure from one end to the other end, and finally transmits the pressure to the front section of the contact piece 24 fixed on the axial fixing part 18 through the axial connecting rod 17 and the axial fixing part 18.

[0068] At the same time, referring to Figure 2 , Figure 3 , Figure 4 , Figure 6 and Figure 8 , it also comprises a fixed truss 19; the fixed truss 19 is located in the T-shaped rod 10 and passes through the U-shaped fixing part 5, is connected with the U-shaped fixing part 5, and forms a containing space containing the first laser sensor 6 with the bottom of the U-shaped fixing part 5; the fixed truss 19 is provided with a second laser sensor 20 at the part exceeding the U-shaped fixing part 5, the second laser sensor 20 is inclined downward, and is used for measuring the micro-deformation amount of the contact piece 24 when the contact piece 24 is axially pressed. One end of the fixed truss 19 is provided with a fixed plate 21, and the fixed plate 21 is fixedly connected with the sheet metal shell 22 through the fixing holes on the fixed plate 21.

[0069] In this embodiment, one side of the fixed truss 19 is welded with a fixed plate 21, the fixed plate 21 is fixed on the sheet metal shell through four screw holes, and the second laser sensor 20 is installed on the fixed plate 21 and is inclined to the other side of the contact piece 24, and is used for measuring the micro-deformation of the contact piece 24 when the contact piece 24 is axially pressed.

[0070] In this embodiment, the fixed truss 19 is a steel structure.

[0071] Referring to Figure 1 and Figure 8 , the moving contact 3 and the stationary contact 4 are arranged below the radial structure 1. The moving contact 3 and the stationary contact 4 are respectively connected with a conductive assembly 23.

[0072] In the embodiment, the conductive assembly 23 is a copper bar.

[0073] In the embodiment, the movable contact 3 and the fixed contact 4 pass 4S, 31.5KA current to the contact patch 24, and the current flows from the bottom copper bar at one end of the movable contact 3 to the fixed contact patch 24 through the contact arm, and then flows from the contact patch 24 to the fixed contact 4 to the copper bar below the fixed contact 4.

[0074] In summary, the application provides a test device for simulating the working condition of the contact patch, which applies downward pressure to the contact patch through the radial structure, measures the pressure applied by the radial structure through the pressure sensor on the radial structure, applies axial pressure through the axial structure, and realizes the micro deformation of the contact patch under the radial and axial pressure through the laser sensor. Meanwhile, the movable contact and the fixed contact can be used to conduct current to the contact patch to simulate the current flow and heating of the contact patch and measure the change of the current flow capacity.

[0075] The above is only an embodiment of the application, and does not limit the patent range of the application. Any equivalent transformation or direct or indirect application in the related technical field based on the content of the specification and drawings is also included in the patent protection range of the application.

Claims

1. A test apparatus for simulating a contact pad operating condition, characterized by, The radial structure is used for radially fixing and pressing the contact piece, and the moving contact and the static contact are used for electrifying the contact piece; The radial structure comprises a radial force arm, a U-shaped fixing member and a first laser sensor; The radial force arm is provided with a first pressure sensor for measuring the radial pressure of the contact piece, and the lower end of the radial force arm is a T-shaped rod; The radial force arm is fixedly connected with the two ends of the U-shaped fixing member through the T-shaped rod; The first laser sensor is arranged between the T-shaped rod and the bottom of the U-shaped fixing member, and the bottom of the U-shaped fixing member is provided with a first observation hole corresponding to the first laser sensor; The moving contact and the static contact are arranged below the radial structure in a spaced manner; The moving contact and the static contact are used for conducting current to the contact piece, and the current conduction and heating of the contact piece are simulated. The bottom of the U-shaped fixing member is provided with a radial fixing member connection for fixing the contact piece, and the radial fixing member is provided with a second observation hole penetrating the first observation hole; The axial structure is used for axially fixing and pressing the contact piece; The axial structure is provided with a second pressure sensor for measuring the axial pressure of the contact piece.

2. The test apparatus for simulating a contact pad working condition according to claim 1, wherein, The bottom of the radial fixing member is provided with a slot for fixing the contact piece.

3. The test apparatus for simulating a contact pad operating condition of claim 1, wherein, The radial force arm comprises a radial straight rod connected with the upper and lower ends of the first pressure sensor and a T-shaped rod; The radial straight rod is sleeved with a radial spring.

4. The test device for simulating the working condition of a contactor according to any one of claims 1 to 3, characterized in that, The radial structure is two; The two radial structures are parallel and have a spacing, so that the two radial structures respectively fix the head and tail of the contact piece in a radial manner.

5. The test apparatus for simulating a contact pad operating condition of claim 1, wherein, The axial structure comprises the second pressure sensor connection, an axial straight rod and an axial connecting rod; One end of the axial connecting rod is connected with the second pressure sensor, and the other end is connected with the axial connecting rod; The axial straight rod is sleeved with an axial spring; The second pressure sensor is provided with an axial fixing member at one end away from the axial connecting rod; The axial fixing member is provided with a slot for fixing the contact piece at one end away from the second pressure sensor.

6. The test apparatus for simulating a contact pad operating condition of claim 1, wherein, The fixed truss is also included; The fixed truss is located at the T-shaped rod and passes through the U-shaped fixing member, is connected with the U-shaped fixing member, and forms an accommodation space with the bottom of the U-shaped fixing member, which can accommodate the first laser sensor; The fixed truss is provided with a second laser sensor at a portion exceeding the U-shaped fixing member, and the second laser sensor is inclined downward, which is used for measuring the micro-deformation amount of the contact piece under axial pressure.

7. The test apparatus for simulating a contact pad operating condition of claim 6, wherein, The sheet metal shell is also included; One end of the fixed truss is provided with a fixed plate, and the fixed truss is fixedly connected with the sheet metal shell through the fixed hole in the fixed plate.

8. The test apparatus for simulating a contact pad working condition according to claim 1, wherein, The moving contact and the static contact are respectively connected with the conductive assembly. ​

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