Switch cabinet with stable connection

Abstract

The utility model discloses a switch cabinet with stable connection, which comprises a cabinet body and a gasket, an upper static contact, a lower static contact and a fixed plate are arranged in the cabinet body, the cabinet body is also provided with a handcart circuit breaker which can be pulled out or pushed in, the upper static contact, the lower static contact and the fixed plate are provided with a supporting frame, and the gasket is arranged on the supporting frame. The two sides of the supporting frame are provided with a plurality of clamping pieces, the two ends of each clamping piece swing and move, and elastic maintaining pieces are arranged between the clamping pieces. According to the utility model, through the plurality of independent clamping pieces, the problem of non-uniform stress of a clamped object caused by inconsistent thicknesses of the upper and lower wire outlet ends and the connecting piece is prevented, the connection stability is improved, the problem of difficulty in management and control in the production process is solved, the manufacturing cost is reduced, and the two ends of the clamping pieces swing left and right, so that the production efficiency is improved. The connecting structure adapts to large assembly errors, avoids the problem of connection looseness caused by vibration, and has the advantages of being stable in connection, even in stress, capable of reducing manufacturing cost and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of switch cabinets, in particular to a switch cabinet with stable connection. Background Art

[0002] High-voltage switchgear refers to the switchgear used for power generation, transmission, distribution, power conversion and consumption in the power system, and plays the role of switching, control or protection. High-voltage switchgear is divided into several categories, including electrical products with voltage levels of 3.6KV to 550KV, high-voltage disconnectors and grounding switches, high-voltage load switches, high-voltage automatic reclosing and sectionalizers, high-voltage operating mechanisms, high-voltage explosion-proof distribution devices and high-voltage switchgear.

[0003] The existing lower-mounted trolley of the high-voltage switchgear is pushed forward by direct hand pushing, and is also the only removable functional component on the complete set of equipment. The trolley contact is of duckbill type, and is connected to the main power circuit through the moving contact on the trolley. During its service life, it must be able to withstand tens of thousands of mechanical plug-in and pull-out operations, maintain long-term stable operation under the rated working current conditions, and be able to withstand the damage of the rated short-time withstand current. Therefore, the coordination and connection properties of the trolley and the static contacts of the high-voltage switchgear are very important.

[0004] According to the authorization announcement number CN202759181U, a duckbill type moving contact is disclosed, which includes a trolley contact arm, the front end of the trolley contact arm is provided with a mounting hole, and there are two contact copper bars on the upper and lower sides of the mounting hole, one of which is provided with a contact fixing pad on the outside of the contact copper bar, and a first butterfly compression spring is provided between the contact fixing pad and the contact copper bar; the first fastening bolt is fastened by the first nut, and a second butterfly compression spring is provided between the first nut and the contact copper bar; a support sleeve is provided between the two contact copper bars, the second fastening bolt is fastened by the second nut, and a second butterfly compression spring is also provided between the second nut and the contact copper bar; the static contact copper bar can be inserted between the two contact copper bars on the opposite sides of the trolley contact arm. After adopting the above structure, not only can the contact surface between the contact copper bar and the static contact copper bar be increased, but also the trolley can be adjusted conveniently, and its structure is simple and compact, which is conducive to flexible operation and cost control.

[0005] However, the above technical solution has the following disadvantages:

[0006] 1) By tightening the bolts and the first nuts, the butterfly compression spring acts on the contact copper bar, which means that the distance between all the first nuts and the contact copper bar needs to be kept within a small error range to ensure that the contact copper bar is subjected to the same pressure from the butterfly compression spring, which indirectly increases the difficulty of control during production and increases the manufacturing cost;

[0007] 2) Since the first nut not only provides support for the butterfly compression spring, but also prevents the fastening bolt from falling off, after long-term use of the product, the vibration generated by the trolley circuit breaker during opening and closing or the vibration of the internal switchgear of the switch cabinet will cause the first nut and the fastening bolt to loosen, reducing the clamping force of the contact copper bar on the moving and static contacts;

[0008] Therefore, the applicant has made a useful design and found a method to solve the above-mentioned problem. The technical solution to be introduced below is produced in this context. Summary of the invention

[0009] The purpose of the utility model is to overcome the shortcomings of the technical solutions mentioned in the above-mentioned traditional background technology and provide a product with stable connection, uniform force and reduced manufacturing cost.

[0010] To solve the above problems, the utility model adopts the following technical solutions.

[0011] A switch cabinet with stable connection comprises a cabinet body and a gasket, wherein an upper static contact, a lower static contact and a fixed plate are arranged in the cabinet body, and the cabinet body is also provided with a pull-out or push-in trolley circuit breaker, wherein the upper static contact, the lower static contact and the fixed plate are provided with a support frame, and a plurality of clamping members with swingable ends are arranged on both sides of the support frame, and elastic retaining members are arranged between the clamping members so that the clamping members are close to each other and clamp and abut the upper static contact, the lower static contact and the fixed plate, and the trolley circuit breaker is provided with an upper outlet terminal, a lower outlet terminal and a connecting block, and the trolley circuit breaker is pushed to move so that the upper outlet terminal and the lower outlet terminal are inserted from the side of the clamping member and the connecting block is inserted from the bottom of the clamping member, so that the clamping member forms a force to clamp the upper outlet terminal, the lower outlet terminal and the connecting block, so that the upper outlet terminal is connected and fixed to the upper static contact, the lower outlet terminal is connected and fixed to the lower static contact, and the connecting block is connected and fixed to the fixed plate.

[0012] Preferably, fixing columns are provided on both sides above and below the two support frames, both ends of the clamping member are arranged on the fixing columns, the gasket is arranged between the clamping members to form a distance between the clamping members, and the side walls of the support frames are provided with clearance holes.

[0013] Preferably, the clamping member includes a first clamping plate, a second clamping plate, and a connecting member, the connecting member connects and fixes the first clamping plate and the second clamping plate, the first clamping plate and the second clamping plate are provided with movable through holes and are arranged on a fixed column, the fixed end of the elastic retaining member is connected to the fixed column, the first clamping plate and the second clamping plate are provided with guide blocks at the upper and lower parts, and the guide blocks are provided with chamfered corners.

[0014] Preferably, the elastic retaining member is configured as a tension spring, and the number of the clamping members is configured to be at least three.

[0015] Preferably, a metal partition is provided in the cabinet to form a busbar chamber and a circuit breaker chamber, a switch compartment is provided in the busbar chamber, and a cable compartment is provided in the circuit breaker chamber.

[0016] Preferably, the switch interval is provided with a busbar interval, a grounding switch is provided below the cable interval, the cable interval is electrically connected to the grounding switch, the upper static contact is fixed to the busbar interval, and the lower static contact is fixed to the cable interval.

[0017] Preferably, the trolley circuit breaker is arranged in a circuit breaker room, a plurality of wheels are provided at the bottom of the trolley circuit breaker, the trolley circuit breaker is provided with a sealed pole, the upper outlet terminal is fixed on the top of the sealed pole, the lower outlet terminal is fixed on the side of the sealed pole, and the number of the upper outlet terminal and the lower outlet terminal corresponds to the upper static contact and the lower static contact.

[0018] Preferably, the fixing plate is fixed to a back plate of the circuit breaker chamber.

[0019] Beneficial effects:

[0020] Compared with the prior art, the beneficial effects of the utility model are:

[0021] The utility model uses a plurality of independent clamping parts to prevent the problem of uneven force on the clamped object caused by inconsistent thickness of the upper and lower wire outlet terminals and the connecting parts, which not only improves the connection stability, but also solves the problem of difficulty in control during the production process, reduces the manufacturing cost, and overcomes the first problem in the background technology; by allowing the two ends of the clamping parts to swing left and right to adapt to larger assembly errors, when the clamped object generates vibrations, the clamping parts are stretched out and move, and the elastic retaining parts are used for buffering and energy storage, thereby avoiding the problem of loose connection caused by vibration, thus overcoming the second problem in the background technology, and making the product have the advantages of stable connection and uniform force. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a cross-sectional view of the main view of a switch cabinet with stable connection according to the utility model;

[0023] Figure 2 It is a schematic diagram of the side cross-section structure of a switch cabinet with stable connection according to the utility model;

[0024] Figure 3 This is a schematic diagram of the structure of a clamping lower static contact and a lower outlet terminal of a switch cabinet with a stable connection according to the utility model;

[0025] Figure 4 This is an exploded view of a switch cabinet with stable connection according to the utility model;

[0026] The corresponding relationship between the illustrations and component names in the figure is as follows:

[0027] Figure numerals: 1. cabinet; 2. metal partition; 3. busbar chamber; 4. circuit breaker chamber; 5. supporting frame; 6. clamping member; 7. elastic retaining member; 31. switch interval; 32. upper static contact; 33. busbar interval; 41. trolley circuit breaker; 42. cable interval; 43. fixing plate; 44. earthing switch; 411. upper outlet terminal; 412. lower outlet terminal; 413. connecting block; 414. wheel; 415. sealed pole 421. lower static contact; 51. fixing column; 52. gasket; 53. make way through hole; 61. first clamping plate; 62. second clamping plate; 63. connecting member; 64. movable through hole; 65. guide block; 66. chamfered corners. DETAILED DESCRIPTION

[0028] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by the terms "up", "down", "left" and "right" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0030] Reference example Figures 1 to 4A switch cabinet with stable connection includes a cabinet body 1 and a gasket 52. An upper static contact 32, a lower static contact 421 and a fixing plate 43 are arranged in the cabinet body 1. The cabinet body 1 is also provided with a pull-out or push-in trolley circuit breaker 41. The upper static contact 32, the lower static contact 421 and the fixing plate 43 are provided with a support frame 5. Both sides of the support frame 5 are provided with a plurality of clamping members 6 with swingable ends. An elastic retaining member 7 is arranged between the clamping members 6 so that the clamping members 6 are close to each other and clamp and abut the upper static contact 32, the lower static contact 421 and the fixing plate 43. The trolley circuit breaker 41 is provided with an upper outlet terminal 411, a lower outlet terminal 412 and a connecting block 413 to push the trolley circuit breaker 41 to move. The upper outlet terminal 411 and the lower outlet terminal 412 are inserted from the side of the clamping member 6, and the connecting block 413 is inserted from the bottom of the clamping member 6, so that the clamping member 6 forms a force to clamp the upper outlet terminal 411, the lower outlet terminal 412, and the connecting block 413, so that the upper outlet terminal 411 and the upper static contact 32, the lower outlet terminal 412 and the lower static contact 421, and the connecting block 413 are connected and fixed to the fixing plate 43. Since the two sides of the upper static contact 32 and the lower static contact 421 abut against the side wall of the support frame 5, the upper outlet terminal 411 and the lower outlet terminal 412 are inserted into the clamping member 6 from the side, and the connection between the support frame 5, the clamping member 6 and the upper static contact 32 and the lower static contact 421 will not be loosened;

[0031] It is worth mentioning that fixing columns 51 are provided on both sides above and below the two supporting frames 5, the two ends of the clamping member 6 are arranged on the fixing columns 51, and the gasket 52 is arranged between the clamping members 6 to form a spacing between the clamping members 6. The side wall of the supporting frame 5 is provided with a clearance through hole 53, and the fixing column 51 is used in conjunction with the movable through hole 64. The gasket 52 prevents the clamping members 6 from rubbing against each other and from interfering with each other when the clamping members 6 swing. The clearance through hole 53 facilitates the upper outlet terminal 411 and the lower outlet terminal 412 to enter from the side of the supporting frame 5;

[0032] It is worth mentioning that the clamping member 6 includes a first clamping plate 61, a second clamping plate 62, and a connecting member 63. The connecting member 63 connects and fixes the first clamping plate 61 and the second clamping plate 62. The first clamping plate 61 and the second clamping plate 62 are provided with a movable through hole 64, and are arranged on the fixed column 51. The fixed end of the elastic retaining member 7 is connected to the fixed column 51. The upper and lower parts of the first clamping plate 61 and the second clamping plate 62 are both provided with guide blocks 65. The guide blocks 65 are provided with chamfered corners 66. The upper and lower static contacts 421 and the upper and lower outlets are adapted through the first clamping plate 61 and the second clamping plate 62. The end 412, the fixing plate 43, and the connecting block 413 have assembly errors due to inconsistent thicknesses at different parts. The connecting piece 63 enables the first clamping plate 61 and the second clamping plate 62 to move synchronously. The connecting piece 63 reduces the number of elastic retaining members 7 used, reduces production costs, and can play the same role. The guide block 65 guides the upper outlet end 411, the lower outlet end 412, the upper static contact 32, the lower static contact 421, the connecting block 413, and the fixing plate 43 to enter between the clamping member 6, and the chamfer 66 reduces the wear of the object entering the clamping member 6;

[0033] It is worth mentioning that the elastic retaining member 7 is configured as a tension spring, and the number of the clamping members 6 is configured as at least three; the spring provides the clamping member 6 with a pulling force to retract inward, and when the clamped object vibrates, the clamping member 6 is stretched outward and moves, and the elastic retaining member 7 is used for buffering and energy storage to avoid the problem of loose connection caused by vibration. By adding multiple clamping members 6, the clamping force on the object can be increased;

[0034] It is worth mentioning that a metal partition 2 is provided in the cabinet 1 to form a busbar chamber 3 and a circuit breaker chamber 4. A switch compartment 31 is provided in the busbar chamber 3, and a cable compartment 42 is also provided in the circuit breaker chamber 4.

[0035] It is worth mentioning that the switch compartment 31 is provided with a bus compartment 33, and a grounding switch 44 is provided below the cable compartment 42. The cable compartment 42 is electrically connected to the grounding switch 44. The upper static contact 32 is fixed to the bus compartment 33, and the lower static contact 421 is fixed to the cable compartment 42. A three-position load switch is installed in the switch compartment 31. The shell of the load switch is cast with epoxy resin and filled with sulfur hexafluoride (SF6) gas as an insulating medium. The bus compartment 33 is on the same horizontal plane as the switch compartment 31. The bus compartment 33 can isolate faults within a certain range to avoid the spread of faults and instantaneous overload of the power grid, which may damage nearby electrical equipment. Cables can be connected in the cable compartment 42, which can be easily connected to the switch and the grounding switch 44 terminals. The interlock of the grounding switch 44 is an important component of the cabinet 1. The existing cabinet 1 must meet the requirement of closing the back door to operate the grounding switch 44 to prevent operators from mistakenly entering the live compartment and ensure the safety of operators.

[0036] It is worth mentioning that the trolley circuit breaker 41 is arranged in the circuit breaker chamber 4, and a plurality of wheels 414 are arranged at the bottom of the trolley circuit breaker 41. The trolley circuit breaker 41 is provided with a sealed pole 415, and the upper outlet terminal 411 is fixed on the top of the sealed pole 415, and the lower outlet terminal 412 is fixed on the side of the sealed pole 415. The number of the upper outlet terminal 411 and the lower outlet terminal 412 corresponds to the upper static contact 32 and the lower static contact 421. The wheels facilitate the movement of the trolley circuit breaker 41. The primary high voltage enters from the upper outlet terminal 411 of the sealed pole 415 and exits from the lower outlet terminal 412, and passes through the vacuum interrupter inside. The mechanism controls the opening and closing of the contacts inside the interrupter, that is, the disconnection and connection of the circuit can be controlled.

[0037] It is worth mentioning that the fixing plate 43 is fixed to the back plate of the circuit breaker chamber 4 , and the fixing plate 43 strengthens the connection and fixation between the trolley circuit breaker 41 and the circuit breaker chamber 4 .

[0038] The use principle of the utility model is now described as follows:

[0039] Push the trolley circuit breaker 41 into the circuit breaker chamber 4, and the upper outlet terminals 411 and the lower outlet terminals 412 enter between the clamping members 6 through the clearance holes 53 in sequence. The connecting member 63 enters between the supporting frame 5 from the bottom of the clamping member 6. The upper outlet terminals 411, the lower outlet terminals 412, and the connecting block 413 gradually open the clamping members 6 on both sides of the supporting frame 5 through the guide block 65, and the fixed column 51 moves to the other end of the movable through hole 64 to adapt to the opened clamping member. 6. The elastic retaining member 7 is affected by the pulling force of the clamping member 6, so that it stores energy. When the upper outlet terminal 411 and the lower outlet terminal 412 enter between the guide blocks 65, the elastic retaining member 7 releases energy, so that the clamping members 6 move closer to each other, forming a clamping force on the upper outlet terminal 411, the lower outlet terminal 412, and the connecting block 413, so that the upper outlet terminal 411 and the upper static contact 32, the lower outlet terminal 412 and the lower static contact 421, and the connecting block 413 and the fixing plate 43 are connected and fixed.

[0040] The above design scheme can enable the product to achieve the advantages of stable connection, uniform force and reduced manufacturing cost.

[0041] The above content is a further detailed description of the utility model in combination with specific implementation methods. It cannot be determined that the specific implementation of the utility model is limited to these descriptions. For ordinary technicians in the technical field to which the utility model belongs, without departing from the concept of the utility model, they can also make several simple deductions or substitutions, which should be regarded as belonging to the scope of protection determined by the claims submitted for the utility model.

Claims

1. A switch cabinet with stable connection, comprising a cabinet body (1) and a gasket (52), wherein the cabinet body (1) is provided with an upper static contact (32), a lower static contact (421), and a fixing plate (43), and the cabinet body (1) is further provided with a pull-out or push-in trolley circuit breaker (41), characterized in that: The upper stationary contact (32), the lower stationary contact (421), and the fixed plate (43) are provided with a support frame (5); a plurality of clamping members (6) with swingable ends are provided on both sides of the support frame (5); elastic retaining members (7) are provided between the clamping members (6) so that the clamping members (6) are close to each other and clamp and abut against the upper stationary contact (32), the lower stationary contact (421), and the fixed plate (43); the trolley circuit breaker (41) is provided with an upper outlet terminal (411), a lower outlet terminal (412), and a connecting block (413); The trolley circuit breaker (41) is pushed to move, so that the upper outlet terminal (411) and the lower outlet terminal (412) are inserted from the side of the clamping member (6), and the connecting block (413) is inserted from the bottom of the clamping member (6), so that the clamping member (6) forms a force to clamp the upper outlet terminal (411), the lower outlet terminal (412), and the connecting block (413), so that the upper outlet terminal (411) and the upper static contact (32), the lower outlet terminal (412) and the lower static contact (421), and the connecting block (413) and the fixing plate (43) are connected and fixed.

2. The switch cabinet with stable connection according to claim 1, characterized in that: Fixed columns (51) are provided at the upper and lower sides of the two support frames (5), the two ends of the clamping member (6) are arranged on the fixed columns (51), the gasket (52) is arranged between the clamping members (6) to form a spacing between the clamping members (6), and the side wall of the support frame (5) is provided with a clearance through hole (53).

3. The switch cabinet with stable connection according to claim 2, characterized in that: The clamping member (6) includes a first clamping plate (61), a second clamping plate (62), and a connecting member (63). The connecting member (63) connects and fixes the first clamping plate (61) and the second clamping plate (62). The first clamping plate (61) and the second clamping plate (62) are provided with movable through holes (64) and are arranged on the fixed column (51). The fixed end of the elastic retaining member (7) is connected to the fixed column (51). The first clamping plate (61) and the second clamping plate (62) are provided with guide blocks (65) above and below, and the guide blocks (65) are provided with chamfered corners (66).

4. The switch cabinet with stable connection according to claim 3, characterized in that: The elastic retaining member (7) is configured as a tension spring, and the number of the clamping members (6) is configured to be at least three.

5. The switch cabinet with stable connection according to claim 1, characterized in that: A metal partition (2) is provided in the cabinet (1) to form a busbar chamber (3) and a circuit breaker chamber (4); a switch compartment (31) is provided in the busbar chamber (3), and a cable compartment (42) is provided in the circuit breaker chamber (4).

6. The switch cabinet with stable connection according to claim 5, characterized in that: The switch interval (31) is provided with a busbar interval (33), a grounding switch (44) is provided below the cable interval (42), the cable interval (42) is electrically connected to the grounding switch (44), the upper static contact (32) is fixed to the busbar interval (33), and the lower static contact (421) is fixed to the cable interval (42).

7. The switch cabinet with stable connection according to claim 6, characterized in that: The trolley circuit breaker (41) is arranged in a circuit breaker chamber (4); a plurality of wheels (414) are arranged at the bottom of the trolley circuit breaker (41); the trolley circuit breaker (41) is provided with a sealed pole (415); the upper outlet terminal (411) is fixed to the top of the sealed pole (415); the lower outlet terminal (412) is fixed to the side of the sealed pole (415); the number of the upper outlet terminal (411) and the lower outlet terminal (412) corresponds to the number of the upper static contact (32) and the lower static contact (421).

8. The switch cabinet with stable connection according to claim 7, characterized in that: The fixing plate (43) is fixed to the back plate of the circuit breaker chamber (4).

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