Automatic discharging equipment of high-voltage capacitance compensation cabinet

Abstract

The invention discloses automatic discharge equipment for a high-voltage capacitance compensation cabinet, and the equipment comprises a cabinet body with a cabinet door, and is also provided with a discharge unit and a group of drive units. The discharge unit can be used for simultaneously and respectively performing pairwise contact discharge on A, B and C phases of the plurality of groups of capacitor terminals without opening the cabinet door; and the automatic driving unit is used for automatically driving the discharging unit to perform discharging operation. The discharge unit and the automatic driving unit are arranged, the discharge unit is automatically driven to perform discharge operation, so that the consistency of pairwise contact time of the first spring conductive needle and the A, B and C phases of the capacitor terminals is ensured, pairwise contact discharge can be performed on the A, B and C phases of multiple groups of capacitor terminals at the same time without opening the cabinet door, the working efficiency is greatly improved, and the production cost is reduced. And the switching between the electrical connection between the first spring conductive needle located in the middle and the first conductive contact head and the second conductive contact head 7 is automatically completed in the discharging process, so that short circuit is avoided.

Description

Technical Field

[0001] This invention relates to the field of electrical cabinet technology, and in particular to an automatic discharge device for a high-voltage capacitor compensation cabinet. Background Technology

[0002] After a power outage, the high-voltage capacitor compensation cabinet automatically discharges through its built-in discharge resistor. However, to ensure safety, manual discharge is still required. When manually discharging, the operator usually opens the cabinet door, holds the two ends of an incandescent lamp to the capacitor, and contacts each of the A, B, and C phases of the individual capacitor in pairs to discharge.

[0003] However, the above operation has the following problems:

[0004] First, handheld tools are prone to electric shock accidents due to slippage or accidental contact, resulting in low safety.

[0005] Second, opening the cabinet allows dust and moisture to enter, accelerating the oxidation of components or the deterioration of insulation, which may cause discharge short circuits. Especially in humid environments, condensation inside the cabinet will reduce the creepage distance and increase the risk of phase-to-phase arcing.

[0006] Third, the efficiency of individual discharge is low.

[0007] Therefore, this application provides an automatic discharge device for a high-voltage capacitor compensation cabinet to meet the requirements. Summary of the Invention

[0008] The purpose of this application is to provide an automatic discharge device for a high-voltage capacitor compensation cabinet to solve the technical problems mentioned in the background above.

[0009] To achieve the above objectives, this application provides the following technical solution: an automatic discharge device for a high-voltage capacitor compensation cabinet, comprising a cabinet with a door, a discharge unit, and a set of drive units;

[0010] Discharge unit: It can simultaneously perform pairwise contact discharge on phases A, B, and C of multiple sets of capacitor terminals without opening the cabinet door;

[0011] Automatic drive unit: used to automatically drive the discharge unit to perform discharge operation.

[0012] In a preferred embodiment of this invention, the discharge unit includes multiple sets of lamp holders mounted on a mounting plate. Each set of lamp holders is equipped with an incandescent lamp, a first conductive connector, and a second conductive connector. Each set of lamp holders is equipped with a U-shaped insulating rod, and each set of insulating rods is slidably pierced and equally spaced with three sets of first spring conductive pins. The three sets of first spring conductive pins are respectively aligned with the corresponding capacitor terminals A, B, and C.

[0013] An insulating ring, a conductive ring, and an insulating block are sequentially arranged on the ends of the three sets of first spring conductive pins near the incandescent lamp. A ball bearing is installed on the end of the insulating block. A return spring is sleeved on the first spring conductive pin, and the two ends of the return spring are connected to the insulating ring and the insulating rod, respectively. A terminal is provided on the conductive ring on both sets of first spring conductive pins. A first conductive plate and a second conductive plate are respectively arranged on both sides of the conductive ring of the first spring conductive pin in the middle. A second spring conductive pin and a third spring conductive pin are respectively arranged on both sides of the first spring conductive pin in the middle, and are mounted on the L-shaped insulating strip. A third conductive plate and a fourth conductive plate are respectively installed at the ends of the second spring conductive pin and the third spring conductive pin.

[0014] The two sets of L-shaped insulating strips are connected by a connecting rod. The lower ends of the two sets of L-shaped insulating strips are respectively equipped with a sliding sleeve and a reciprocating nut. The reciprocating nut is installed on the reciprocating screw, and the sliding sleeve is sleeved on the reciprocating screw. The reciprocating screw is rotatably mounted on the insulating rod. A one-way gear is installed on the insulating rod, and the one-way gear meshes with the insulating tooth plate. The insulating tooth plate is installed on the conductive ring set in the middle.

[0015] Both the sliding sleeve and the reciprocating nut are slidably penetrated by the limiting post installed on the insulating rod;

[0016] Multiple sets of insulating rods are movably penetrated by rotating rods. Three sets of cams are respectively provided on the part of the insulating rod located in the U-shaped cavity of each set of insulating rods, and each set of cams is provided with two sets of protrusions. The three sets of cams are respectively provided with three sets of ball bearings.

[0017] In a preferred embodiment of this invention, the automatic drive unit includes a drive rod rotatably mounted on the cabinet door, a first bevel gear mounted on the end of the drive rod, a hollow column fixed to the outer wall of the cabinet door and having a movement groove, and a toothed column for driving the drive rod to rotate. The bottom of the hollow column is provided with a groove, and the lower end of the toothed column is located in the groove.

[0018] The outer wall of the toothed column is provided with a limiting groove, the inner wall of the hollow column is provided with a limiting protrusion, the hollow column is provided with a material handling opening, and the upper end of the toothed column is located in the space of the material handling opening.

[0019] The drive rod is provided with a drive gear and a second bevel gear at both ends, and the second bevel gear meshes with the first bevel gear.

[0020] In a preferred embodiment of this invention, an elastic cushioning pad is installed at the lower end of the toothed column.

[0021] In summary, the technical effects and advantages of this invention are as follows:

[0022] This invention has a reasonable structure. It is equipped with a discharge unit and an automatic drive unit. The automatic drive discharge unit performs the discharge operation, thereby ensuring the consistency of the contact time between the first spring conductive pin and the A, B, and C phases of the capacitor terminals. Moreover, it can simultaneously perform pairwise contact discharge on the A, B, and C phases of multiple sets of capacitor terminals without opening the cabinet door, which greatly improves the working efficiency. During the discharge process, it automatically completes the switching between the electrical connection of the first spring conductive pin located in the middle and the first conductive contact head and the second conductive contact head, avoiding short circuits. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a partial three-dimensional structural schematic diagram of the present invention;

[0025] Figure 2 for Figure 1 Schematic diagram of the inner structure of the cabinet door;

[0026] Figure 3 for Figure 2 Schematic diagram of a partial structure of the intermediate discharge unit;

[0027] Figure 4 for Figure 3 Schematic diagram of the middle insulating rod structure;

[0028] Figure 5 for Figure 4 A schematic diagram of the first spring conductive needle located in the middle;

[0029] Figure 6 for Figure 5 Mid-view structural diagram;

[0030] Figure 7 for Figure 4 Schematic diagram of the first spring conductive needle structure;

[0031] Figure 8 This is a schematic diagram showing the connection between the spring-loaded conductive pin and the conductive connector wire.

[0032] In the diagram: 1. Cabinet body; 2. Cabinet door; 3. Mounting plate; 4. Lamp holder; 5. Incandescent lamp; 6. First conductive connector; 7. Second conductive connector; 8. Insulating rod; 9. First spring conductive pin; 10. Rotating rod; 11. Cam; 12. Protrusion; 13. Insulating ring; 14. Conductive ring; 15. Insulating block; 16. Ball bearing; 17. Terminal; 18. Return spring; 19. Second spring conductive pin; 20. Third spring conductive pin; 21. First conductive... 21. First conductive sheet; 22. Second conductive sheet; 23. L-shaped insulating strip; 24. Connecting rod; 25. Sliding sleeve; 26. Reciprocating nut; 27. Reciprocating lead screw; 28. Insulating toothed plate; 29. ​​One-way gear; 30. First bevel gear; 31. Second bevel gear; 32. Drive rod; 33. Drive gear; 34. Hollow column; 35. Toothed column; 36. Material handling opening; 37. Limiting protrusion; 38. Third conductive sheet; 39. Fourth conductive sheet; 40. Limiting post. Detailed Implementation

[0033] 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.

[0034] Example: Reference Figure 1-2 The high-voltage capacitor compensation cabinet automatic discharge device shown includes a cabinet 1 with a cabinet door 2, a discharge unit and a set of drive units.

[0035] Discharge unit: It can simultaneously perform two-to-two contact discharge on phases A, B, and C of multiple capacitor terminals without opening cabinet door 2;

[0036] Automatic drive unit: Used to automatically drive the discharge unit to perform discharge operations.

[0037] As a preferred embodiment of this example, Figure 3-7 As shown, the discharge unit includes multiple sets of lamp holders 4 mounted on the mounting plate 3. Each set of lamp holders 4 is equipped with an incandescent lamp 5. Each set of lamp holders 4 is provided with a first conductive connector 6 and a second conductive connector 7. Each set of lamp holders 4 is equipped with a U-shaped insulating rod 8. Each set of insulating rods 8 is slidably penetrated and equally spaced with three sets of first spring conductive pins 9. The three sets of first spring conductive pins 9 are respectively aligned with the corresponding capacitor terminals A, B, and C.

[0038] An insulating ring 13, a conductive ring 14, and an insulating block 15 are sequentially arranged on the ends of the three sets of first spring conductive pins 9 near the incandescent lamp 5. A ball bearing 16 is installed on the end of the insulating block 15. A return spring 18 is sleeved on the first spring conductive pin 9, and the two ends of the return spring 18 are connected to the insulating ring 13 and the insulating rod 8, respectively. A terminal 17 is provided on the conductive ring 14 on both sets of first spring conductive pins 9. A first conductive plate 21 and a second conductive plate 22 are respectively arranged on both sides of the conductive ring 14 of the middle first spring conductive pin 9. A second spring conductive pin 19 and a third spring conductive pin 20 are respectively installed on the L-shaped insulating strip 23 on both sides of the middle first spring conductive pin 9. A third conductive plate 38 and a fourth conductive plate 39 are respectively installed on the ends of the second spring conductive pin 19 and the third spring conductive pin 20.

[0039] Two sets of L-shaped insulating strips 23 are connected by a connecting rod 24. The lower ends of the two sets of L-shaped insulating strips 23 are respectively equipped with a sliding sleeve 25 and a reciprocating nut 26. The reciprocating nut 26 is installed on the reciprocating screw 27, and the sliding sleeve 25 is sleeved on the reciprocating screw 27. The reciprocating screw 27 is rotatably mounted on the insulating rod 8. A one-way gear 29 is installed on the insulating rod 8, and the one-way gear 29 meshes with the insulating toothed plate 28. The insulating toothed plate 28 is installed on the conductive ring 14 set in the middle.

[0040] Both the sliding sleeve 25 and the reciprocating nut 26 are slidably penetrated by the limiting post 40 installed on the insulating rod 8;

[0041] Multiple sets of insulating rods 8 are movably penetrated by rotating rods 10. Three sets of cams 11 are respectively provided on the part of the insulating rod 8 located in the U-shaped cavity of each set of insulating rods 8, and two sets of protrusions 12 are provided on each set of cams 11. The three sets of cams 11 are respectively provided with three sets of ball bearings 16.

[0042] At the beginning, such as Figure 8 As shown, the first spring conductive pin 9 on the left and right sides is connected to the first conductive connector 8 and the second conductive connector 7 respectively through wires; the third spring conductive pin 20 is connected to the second conductive connector 7 through wires; and the second spring conductive pin 19 is connected to the first conductive connector 6 through wires.

[0043] Initially, the ball bearing 16 rolls against the outer wall of the cam 11. During operation, without opening the cabinet door 2, the rotating rod 10 can be rotated via the automatic drive unit. The outermost two sets of balls on the same lamp holder 4 contact the protrusion 12 on the cam 11, causing the outermost two sets of first spring conductive pins 9 to be lifted outwards and contact the A and C terminals of the capacitor for discharge. When the ball bearing 16 passes the protrusion 12, the outermost two sets of first spring conductive pins 9 return to their original position due to the elastic force of the return spring 18, continuing to rotate the rotating rod 10. The leftmost and middle first spring conductive pins 9 are squeezed by the protrusion 12 and move outwards. After discharging from phases A and B of capacitors, the device returns to its original position. (When the first spring conductive pin 9 is lifted and moves outward, the second conductive plate 22 on it will contact the fourth conductive plate 39 to form a conductive path, and drive the fourth conductive plate 39 to move outward together. At this time, the insulating toothed plate 28 cannot drive the reciprocating screw 27 to rotate through the one-way gear 29. During the process of the first spring conductive pin 9 returning to its original position, when the second conductive plate 22 contacts and separates from the fourth conductive plate 39, the insulating toothed plate 28 will drive the reciprocating screw 27 to rotate through the one-way gear 29, thereby allowing the second spring conductive pin 19 and the third spring conductive pin 20 to move outward together.) Figure 8 As shown, the movement to the left causes the third conductive plate 38 to move onto the path of the subsequent discharge movement of the first conductive plate 21. The rotating rod 10 continues to rotate, causing the middle first spring conductive pin 9 and the rightmost first spring conductive pin 9 to contact and discharge with the B and C phases of the capacitor. After discharge, both sets of first spring conductive pins 9 return to their original positions. During the process of the middle first spring conductive pin 9 returning to its original position, its insulating toothed plate 28 will drive the reciprocating screw 27 to rotate in the opposite direction via the one-way gear 29. Finally, the second spring conductive pin 19 and the third spring conductive pin 20... Figure 8 It moves to the right and returns to its original position as shown.

[0044] This discharge device can directly rotate the rotating rod 10 to drive the first spring conductive needle 9 to perform pairwise contact discharge operations on the A, B, and C phases of multiple capacitor terminals without opening the cabinet door 2. It is safe and has high working efficiency.

[0045] It is important to note the following: First, after each discharge and before the second discharge, the first spring conductive pin 9 switches between electrical connections with the first conductive contact 6 and the second conductive contact 7. This is to ensure a complete circuit for the incandescent lamp 5 during discharge, facilitating smooth discharge and preventing short circuits, i.e., the current not passing through the incandescent lamp 5, which could cause the short-circuit current wire to melt, resulting in capacitor terminal burnout and damage to the internal structure of the cabinet. Second, both the discharge unit and the manual drive unit are carried by the cabinet door 2, preventing hand operation from causing safety accidents.

[0046] As a preferred embodiment of this example, Figure 1As shown, the automatic drive unit includes a drive rod 32 rotatably mounted on the cabinet door 2, a first bevel gear 30 mounted on the end of the rotating rod 10, a hollow column 34 fixed to the outer wall of the cabinet door 2 and having a motion groove, and a toothed column 35 for driving the rotating rod 10 to rotate. The bottom of the hollow column 34 is provided with a groove, and the lower end of the toothed column 35 is located in the groove.

[0047] The outer wall of the toothed column 35 is provided with a limiting groove, the inner wall of the hollow column 34 is provided with a limiting protrusion 37, the hollow column 34 is provided with a material handling opening 36, and the upper end of the toothed column 35 is located in the space of the material handling opening 36.

[0048] The two ends of the drive rod 32 are respectively provided with a drive gear 33 and a second bevel gear 31, and the second bevel gear 31 is meshed with the first bevel gear 30.

[0049] Manual operation cannot guarantee the rotation speed of the rotating rod 10, and thus cannot guarantee the consistency of the contact time between the first spring conductive pin 9 and the A, B, and C phases of the capacitor terminal. This can easily lead to some contacts having excessively long discharge times (which prolongs the overall discharge time and reduces work efficiency), and some contacts having excessively short discharge times (which can easily lead to incomplete discharge and cause safety accidents). Therefore, an automatic drive unit is set up.

[0050] During operation, the toothed column 35 is taken out from the material feeding opening 36 and slowly inserted into the upper end of the hollow column 34, so that the toothed column 35 meshes with the drive gear 33. Under the action of gravity, the toothed column 35 slowly moves downward and drives the drive rod 32 to rotate, thereby driving the rotating rod 10 to rotate, thus ensuring the consistency of the contact time between the first spring conductive needle 9 and the A, B, and C phases of the capacitor terminal. After the discharge is completed, the toothed column 35 will move into the groove set at the bottom of the hollow column 34.

[0051] As a preferred embodiment of this invention, not shown in the figure, an elastic cushioning pad is installed at the lower end of the toothed post 35.

[0052] The collision between the toothed post 35 and the hollow post 34 can be buffered by the elastic buffer pad.

[0053] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. 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. An automatic discharge device for a high-voltage capacitor compensation cabinet, comprising a cabinet (1) with a cabinet door (2), characterized in that: It is also equipped with a discharge unit and a set of drive units; Discharge unit: without opening the cabinet door (2), it can simultaneously perform two-to-two contact discharge on phases A, B, and C of multiple capacitor terminals; Automatic drive unit: used to automatically drive the discharge unit to perform discharge operation.

2. The automatic discharge device for a high-voltage capacitor compensation cabinet according to claim 1, characterized in that: The discharge unit includes multiple sets of lamp holders (4) mounted on the mounting plate (3). Each set of lamp holders (4) is equipped with an incandescent lamp (5). Each set of lamp holders (4) is provided with a first conductive connector (6) and a second conductive connector (7). Each set of lamp holders (4) is equipped with a U-shaped insulating rod (8). Each set of insulating rods (8) is slidably penetrated and equally spaced with three sets of first spring conductive pins (9). The three sets of first spring conductive pins (9) are respectively aligned with the corresponding capacitor terminals A, B, and C. The first set of three sets of first spring conductive pins (9) near the incandescent lamp (5) are sequentially provided with an insulating ring (13), a conductive ring (14), and an insulating block (15), and a ball bearing (16) is installed on the end of the insulating block (15). A return spring (18) is sleeved on the first spring conductive pin (9), and the two ends of the return spring (18) are respectively connected to the insulating ring (13) and the insulating rod (8). The conductive ring (14) on both sets of first spring conductive pins (9) is provided with an insulating ring (13), a conductive ring (14), and an insulating block (15). The connector (17) has a first conductive plate (21) and a second conductive plate (22) respectively on both sides of the conductive ring (14) of the first spring conductive pin (9) in the middle. The first spring conductive pin (9) in the middle has a second spring conductive pin (19) and a third spring conductive pin (20) respectively installed on the L-shaped insulating strip (23). The ends of the second spring conductive pin (19) and the third spring conductive pin (20) are respectively equipped with a third conductive plate (38) and a fourth conductive plate (39). The two sets of L-shaped insulating strips (23) are connected by a connecting rod (24). The lower ends of the two sets of L-shaped insulating strips (23) are respectively equipped with a sliding sleeve (25) and a reciprocating nut (26). The reciprocating nut (26) is installed on the reciprocating screw (27). The sliding sleeve (25) is sleeved on the reciprocating screw (27). The reciprocating screw (27) is rotatably mounted on the insulating rod (8). A one-way gear (29) is installed on the insulating rod (8). The one-way gear (29) meshes with the insulating tooth plate (28). The insulating tooth plate (28) is installed on the conductive ring (14) set in the middle. Both the sliding sleeve (25) and the reciprocating nut (26) are slidably penetrated by the limiting post (40) mounted on the insulating rod (8); Multiple sets of insulating rods (8) are movably penetrated by rotating rods (10). Three sets of cams (11) are respectively provided on the part of the insulating rod (8) located in the U-shaped cavity of each set of insulating rods (8), and two sets of protrusions (12) are provided on each set of cams (11). The three sets of cams (11) are respectively provided with three sets of balls (16).

3. The automatic discharge device for a high-voltage capacitor compensation cabinet according to claim 2, characterized in that: The automatic drive unit includes a drive rod (32) rotatably mounted on the cabinet door (2), a first bevel gear (30) mounted on the end of the rotating rod (10), a hollow column (34) fixed to the outer wall of the cabinet door (2) and having a motion groove, and a toothed column (35) for driving the rotating rod (10) to rotate. The bottom of the hollow column (34) is provided with a groove, and the lower end of the toothed column (35) is located in the groove. The outer wall of the toothed column (35) is provided with a limiting groove, the inner wall of the hollow column (34) is provided with a limiting protrusion (37), the hollow column (34) is provided with a material handling opening (36), and the upper end of the toothed column (35) is located in the space of the material handling opening (36). The two ends of the drive rod (32) are respectively provided with a drive gear (33) and a second bevel gear (31), and the second bevel gear (31) meshes with the first bevel gear (30).

4. The automatic discharge device for a high-voltage capacitor compensation cabinet according to claim 3, characterized in that: An elastic cushioning pad is installed at the lower end of the toothed column (35).

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