Capacitor tube withstand voltage test tool

Abstract

The invention relates to a capacitor tube withstand voltage test tool, and belongs to the technical field of test tools, the capacitor tube withstand voltage test tool comprises a shell, an insulation end cover, a wiring end cover, a conductive support, a fixed support, a conductive plugboard and a fixed plugboard, the conductive plugboard and the fixed plugboard are respectively fixed at a fixed hole and an access hole at two ends of the shell; the conductive bracket is fixed on the insulating end cover; the fixed bracket is fixed on the inner end wall of the shell; the conductive plugboard and the fixed plugboard are oppositely arranged in the shell, the conductive plugboard is provided with a plurality of conductive slots, and the fixed plugboard is provided with a plurality of fixed jacks; one ends of the plurality of capacitor tubes are detachably inserted into the plurality of conductive slots, and the other ends of the plurality of capacitor tubes are detachably inserted into the plurality of fixed jacks. According to the invention, the test power supply is connected with the anodes of the plurality of capacitor tubes through the conductive support and the conductive plugboard, and the ground is connected with the cathodes of the plurality of capacitor tubes through the wiring terminal and the power line, so that the plurality of capacitor tubes can be electrically connected at the same time or independently, and the withstand voltage test of the plurality of capacitor tubes is facilitated.

Description

Technical Field

[0001] This invention relates to the field of testing fixture technology, and in particular to a capacitor tube withstand voltage testing fixture. Background Technology

[0002] Ultra-high voltage (UHV) capacitor tubes are power capacitors used inside circuit breakers and are key components in UHV transmission systems. With the expansion of power plants and the increase in circuit breaker production, the production of capacitor tubes has also surged. Therefore, capacitor manufacturers face enormous annual production demands. To ensure the quality of capacitor tube production, after manufacturing, the capacitor tubes need to undergo lightning impulse withstand voltage testing, power frequency withstand voltage testing, and partial discharge testing against ground.

[0003] During testing, the actual working environment of the capacitor tube is simulated. One end of the capacitor tube is connected to a voltage source, and the other end is connected to ground. The qualification of the capacitor tube is determined based on partial discharge detection and the presence of discharge phenomena. If the capacitor tube is not subject to quality control, a failure of the capacitor tube during operation will force the power station to shut down for maintenance, affecting the power transmission between upstream and downstream.

[0004] Therefore, in order to solve the quality problems in capacitor tube production, it is necessary to design a withstand voltage fixture that can simulate the actual working conditions of capacitor tubes. Due to the increase in demand, multiple capacitor tubes need to be installed inside a circuit breaker. The withstand voltage fixture that can only test one capacitor tube at a time cannot meet the requirements. It is necessary to perform withstand voltage tests on multiple capacitor tubes simultaneously. Summary of the Invention

[0005] This invention provides a capacitor tube withstand voltage testing fixture, which solves the technical problem that existing capacitor tube withstand voltage testing fixtures can only test a single capacitor tube.

[0006] The technical solution of this invention to solve the above-mentioned technical problems is as follows: a capacitor tube withstand voltage testing fixture for simultaneously testing the withstand voltage of multiple capacitor tubes, comprising: a housing, an insulating end cap, a terminal end cap, a conductive bracket, a fixing bracket, a conductive insert plate, and a fixing insert plate.

[0007] The housing has a fixing hole and an inlet / outlet hole at each end; the insulating end cap is fixed at the fixing hole; the wiring end cap (insulating end cap) is detachably connected to the inlet / outlet hole and has multiple wiring holes, each with a fixed wiring terminal; the conductive bracket and the fixing bracket are both located inside the housing, the conductive bracket is fixed to the insulating end cap and one end of the conductive bracket passes through the insulating end cap and exits the housing; the fixing bracket is fixed to the inner end wall of the housing corresponding to the wiring end cap; the conductive insert plate and the fixing insert plate are arranged opposite each other inside the housing along the height direction of the housing. A conductive insert plate is fixed on the conductive bracket and has multiple conductive slots thereon. A fixed insert plate is fixed on the fixed bracket and has multiple fixed sockets that are respectively arranged opposite to the multiple conductive slots. One end of each of the multiple capacitor tubes is detachably inserted into the multiple conductive slots and connected to the test power supply through the conductive bracket and the conductive insert plate. The other end of each of the multiple capacitor tubes is detachably inserted into the multiple fixed sockets and connected to the ground through the power cord and the terminal block, so that the withstand voltage of each of the multiple capacitor tubes can be tested after the test power supply is powered.

[0008] The beneficial effects of this invention are as follows: A novel capacitor tube withstand voltage testing fixture is designed. First, multiple conductive slots and multiple fixing holes are provided on the relatively arranged conductive and fixing plates, allowing the two ends of multiple capacitor tubes to be detachably inserted into the conductive slots and fixing holes, facilitating the simultaneous fixing and support of multiple capacitor tubes. Then, a test power supply is connected to the positive terminals of multiple capacitor tubes through the conductive bracket and conductive plates, and the ground is connected to the negative terminals of multiple capacitor tubes through the terminals and power lines. This allows multiple capacitor tubes to be electrically connected simultaneously or individually, facilitating withstand voltage testing of multiple capacitor tubes and improving the efficiency of capacitor tube withstand voltage testing.

[0009] Based on the above technical solution, the present invention can be further improved as follows.

[0010] Furthermore, it also includes multiple positioning pins, and the bottom of each of the multiple conductive slots is provided with positioning pin holes; the multiple positioning pin holes are respectively fixed to one end of the multiple capacitor tubes and are respectively positioned and inserted into the corresponding positioning pin holes.

[0011] The further beneficial effect of adopting the above is that by using a positioning pin to fix one end of the capacitor tube and inserting it into the positioning pin hole, the position of the capacitor tube can be accurately positioned, which facilitates the insertion of the capacitor tube.

[0012] Furthermore, it also includes multiple plug-in handles. The fixed plug plate has multiple handle grooves on the side away from the conductive plug plate, and the multiple handle grooves are respectively located on one side of the multiple fixed plug holes. The multiple plug-in handles are respectively fixed to the other end of the multiple capacitor tubes and can be inserted into the corresponding handle grooves.

[0013] The further beneficial effect of adopting the above is that by using the plug handle to fix it to the other end of the capacitor tube, it is easy to take out and put in the capacitor tube after the terminal cover is opened, thus improving the convenience of capacitor tube withstand voltage testing.

[0014] Furthermore, it also includes a first shielding tube, a second shielding tube, and a third shielding tube, all of which are located inside the housing. The first shielding tube is gap-fitted outside the conductive support and fixed to the conductive insert plate; the second shielding tube is gap-fitted outside the multiple capacitor tubes and fixed to the conductive insert plate; and the third shielding tube is gap-fitted outside the multiple capacitor tubes and fixed to the fixed insert plate.

[0015] The further beneficial effects of adopting the above are: by respectively placing the first shielding tube gap outside the conductive support, the second shielding tube gap outside the multiple capacitor tubes, and the third shielding tube gap outside the multiple capacitor tubes, the ultra-high voltage generated by the test current can be shielded, thereby improving the safety of capacitor tube withstand voltage testing.

[0016] Furthermore, the longitudinal sections of the first shielding tube, the second shielding tube, and the third shielding tube are all arc-shaped structures to prevent the ultra-high voltage current generated by the test current from discharging on the first shielding tube, the second shielding tube, or the third shielding tube.

[0017] Furthermore, it also includes an observation window, and the side wall of the housing is provided with an observation hole; the observation window is fixed at the observation hole.

[0018] Furthermore, it also includes an inflation valve, and the side wall of the housing is provided with an inflation hole; the inflation valve is fixed at the inflation hole to fill the interior of the housing with insulating gas.

[0019] The further beneficial effect of adopting the above is that filling the housing with insulating gas through the gas filling valve can improve the internal insulation of the housing and improve the safety of capacitor tube withstand voltage test. Attached Figure Description

[0020] Figure 1 This is a front view of the internal structure of a capacitor tube withstand voltage testing fixture according to the present invention;

[0021] Figure 2 for Figure 1 A magnified structural diagram of point A;

[0022] Figure 3 for Figure 1 A magnified structural diagram of section B;

[0023] Figure 4 This is a top view of the internal structure of a capacitor tube withstand voltage testing fixture according to the present invention.

[0024] Figure 5 This is a schematic diagram of the internal structure of the capacitor tube and the plug handle in a capacitor tube withstand voltage test fixture of the present invention.

[0025] The attached diagram lists the components represented by each number as follows:

[0026] 1. Housing; 2. Insulating end cap; 3. Wiring end cap; 4. Conductive bracket; 5. Fixing bracket; 6. Conductive insert plate; 61. Conductive slot; 62. Positioning pin hole; 7. Fixing insert plate; 71. Fixing insertion hole; 8. Capacitor tube; 9. Wiring terminal; 10. Positioning pin; 11. Insertion handle; 12. First shielding cylinder; 13. Second shielding cylinder; 14. Third shielding cylinder; 15. Observation window; 16. Inflation valve. Detailed Implementation

[0027] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0028] like Figure 1 As shown, a capacitor tube withstand voltage testing fixture is used to simultaneously test the withstand voltage of multiple capacitor tubes 8. It includes: a housing 1, an insulating end cap 2, a wiring end cap 3, a conductive support 4, a fixing support 5, a conductive insert plate 6, and a fixing insert plate 7.

[0029] The housing 1 has a fixing hole and an inlet / outlet hole at each end; the insulating end cover 2 is fixed at the fixing hole; the wiring end cover 3 is detachably connected to the inlet / outlet hole and has multiple wiring holes, each with a fixed wiring terminal 9; the conductive support 4 and the fixing support 5 are both located inside the housing 1, the conductive support 4 is fixed on the insulating end cover 2 and one end of the conductive support 4 passes through the insulating end cover 2 and out of the housing 1; the fixing support 5 is fixed on the inner end wall of the housing 1 corresponding to the wiring end cover 3; the conductive insert plate 6 and the fixing insert plate 7 are arranged opposite each other in the housing 1 along the height direction of the housing 1, and the conductive insert plate 6 is fixed on the conductive support 5. The frame 4 is provided with multiple conductive slots 61. The fixed plate 7 is fixed on the fixed bracket 5 and is provided with multiple fixed holes 71 arranged opposite to the multiple conductive slots 61. One end of multiple capacitor tubes 8 is detachably inserted into the multiple conductive slots 61 and connected to the test power supply through the conductive bracket 4 and the conductive plate 6. The other end of the multiple capacitor tubes 8 is detachably inserted into the multiple fixed holes 71 and connected to the ground through the power cord and the terminal 9, so that the withstand voltage of the multiple capacitor tubes 8 can be tested after the test power supply is powered.

[0030] like Figure 2 As shown, in some specific embodiments, multiple positioning pins 10 may also be included, and multiple conductive slots 61 are provided with positioning pin holes 62 at the bottom of the slots; the multiple positioning pin holes 62 are respectively fixed to one end of multiple capacitor tubes 8 and respectively positioned and inserted into the corresponding positioning pin holes 62.

[0031] like Figure 3 As shown, in some specific embodiments, multiple plug-in handles 11 may also be included. The side of the fixed plug plate 7 away from the conductive plug plate 6 is provided with multiple handle grooves and the multiple handle grooves are respectively located on one side of multiple fixed plug holes 71. The multiple plug-in handles 11 are respectively fixed to the other end of multiple capacitor tubes 8 and can be inserted into the corresponding handle grooves respectively.

[0032] like Figure 1 and Figure 4 As shown, in some specific embodiments, it may also include a first shielding cylinder 12, a second shielding cylinder 13, and a third shielding cylinder 14. The first shielding cylinder 12, the second shielding cylinder 13, and the third shielding cylinder 14 are all located inside the housing 1. The first shielding cylinder 12 is gap-fitted around the conductive support 4 and fixed on the conductive insert plate 6; the second shielding cylinder 13 is gap-fitted around the multiple capacitor tubes 8 and fixed on the conductive insert plate 6; the third shielding cylinder 14 is gap-fitted around the multiple capacitor tubes 8 and fixed on the fixed insert plate 7.

[0033] like Figure 1 and Figure 4As shown, in some specific embodiments, the longitudinal sections of the first shielding cylinder 12, the second shielding cylinder 13, and the third shielding cylinder 14 are all arc-shaped structures to prevent the ultra-high voltage current generated by the test current from discharging on the first shielding cylinder 12, the second shielding cylinder 13, or the third shielding cylinder 14.

[0034] like Figure 4 As shown, in some specific embodiments, an observation window 15 is also included, and an observation hole is provided on the side wall of the housing 1; the observation window 15 is fixed at the observation hole.

[0035] like Figure 4 As shown, in some specific embodiments, an inflation valve 16 is also included, and an inflation hole is provided on the side wall of the housing 1; the inflation valve 16 is fixed at the inflation hole to fill the housing 1 with insulating gas.

[0036] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A capacitor tube withstand voltage testing fixture, used to simultaneously test the withstand voltage of multiple capacitor tubes (8), characterized in that, include: The housing (1) has a fixing hole and an inlet / outlet hole at both ends; Insulating end cap (2) and wiring end cap (3), wherein the insulating end cap (2) is fixed at the fixing hole; the wiring end cap (3) is detachably connected to the inlet and outlet hole and has a plurality of wiring holes on which wiring terminals (9) are fixed; The conductive bracket (4) and the fixed bracket (5) are both located inside the housing (1). The conductive bracket (4) is fixed on the insulating end cover (2) and one end of it passes through the insulating end cover (2) and exits the housing (1). The fixed bracket (5) is fixed on the inner wall of the housing (1) corresponding to the terminal cover (3). A conductive insert (6) and a fixed insert (7) are arranged opposite to each other in the housing (1) along the height direction of the housing (1). The conductive insert (6) is fixed on the conductive bracket (4) and has multiple conductive slots (61). The fixed insert (7) is fixed on the fixed bracket (5) and has multiple fixed sockets (71) arranged opposite to the multiple conductive slots (61). One end of multiple capacitor tubes (8) is detachably inserted into the multiple conductive slots (61) and connected to the test power supply through the conductive bracket (4) and the conductive insert (6). The other end of multiple capacitor tubes (8) is detachably inserted into the multiple fixed sockets (71) and connected to the ground through the power cord and the terminal (9) so as to detect the withstand voltage of the multiple capacitor tubes (8) after the test power supply is powered.

2. The capacitor tube withstand voltage testing fixture according to claim 1, characterized in that, It also includes multiple positioning pins (10), and the bottom of each of the multiple conductive slots (61) is provided with positioning pin holes (62); the multiple positioning pin holes (62) are respectively fixed to one end of the multiple capacitor tubes (8) and respectively positioned and inserted into the corresponding positioning pin holes (62).

3. The capacitor tube withstand voltage testing fixture according to claim 1, characterized in that, It also includes multiple plug handles (11), and the fixed plug plate (7) is provided with multiple handle grooves on the side away from the conductive plug plate (6), and the multiple handle grooves are respectively located on one side of the multiple fixed plug holes (71); the multiple plug handles (11) are respectively fixed to the other end of the multiple capacitor tubes (8) and can be inserted into the corresponding handle grooves respectively.

4. The capacitor tube withstand voltage testing fixture according to claim 1, characterized in that, It also includes a first shielding tube (12), a second shielding tube (13), and a third shielding tube (14). The first shielding tube (12), the second shielding tube (13), and the third shielding tube (14) are all located inside the housing (1). The first shielding tube (12) is gapped outside the conductive support (4) and fixed on the conductive insert plate (6). The second shielding tube (13) is gapped outside the multiple capacitor tubes (8) and fixed on the conductive insert plate (6). The third shielding tube (14) is gapped outside the multiple capacitor tubes (8) and fixed on the fixed insert plate (7).

5. The capacitor tube withstand voltage testing fixture according to claim 4, characterized in that, The longitudinal sections of the first shielding tube (12), the second shielding tube (13), and the third shielding tube (14) are all arc-shaped to prevent the ultra-high voltage current generated by the test current from discharging on the first shielding tube (12), the second shielding tube (13), or the third shielding tube (14).

6. The capacitor tube withstand voltage testing fixture according to claim 1, characterized in that, It also includes an observation window (15), and the side wall of the housing (1) is provided with an observation hole; the observation window (15) is fixed at the observation hole.

7. The capacitor tube withstand voltage testing fixture according to claim 1, characterized in that, It also includes an inflation valve (16), and the side wall of the housing (1) is provided with an inflation hole; the inflation valve (16) is fixed at the inflation hole to fill the housing (1) with insulating gas.

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