A busbar expansion joint for switch cabinet and a busbar bridge structure for switch cabinet

Abstract

The utility model relates to a busbar expansion joint and busbar bridge structure for a switch cabinet, which not only has better use effect, but also has lower use noise, and at the same time has high overall structural strength. Four limit baffles are arranged on the outer circumference of one end of the square tube body in the left expansion joint, and the four limit baffles form a "mouth"-shaped baffle frame. Four mounting plates 1 are arranged on the outer circumference of the other end of the square tube body. The four mounting plates 1 are distributed in a "mouth" shape, and the mounting plate 1 is provided with a plurality of through holes 1 that penetrate the front and back sides of the mounting plate 1; four mounting plates 2 are arranged on the outer circumference of the outer end of the second square tube body section, and the mounting plate 2 is provided with a plurality of through holes 2; one end of the left expansion joint with the "mouth"-shaped baffle frame is located in the first square tube body section. Advantages: A busbar expansion joint and busbar bridge structure for a switch cabinet, which not only has better use effect, but also has lower use noise, and at the same time has high overall structural strength.

Description

Technical Field

[0001] The utility model belongs to the field of switch cabinet busbar bridge manufacturing, and specifically relates to a busbar expansion joint for a switch cabinet and a switch cabinet busbar bridge structure. Background Art

[0002] CN 202930877 U, name “A common box enclosed busbar housing expansion joint device”, comprises an outer shell and an inner shell, both of which are rectangular frame structures, the outer shell and the inner shell are sleeved together, and the outer shell and the inner shell are connected to the busbar housing by flanges. The upper and lower surfaces of the inner shell are provided with outward flanges, and the flanges are in contact with the inner wall of the outer shell. The outer shell and the inner shell are both made of aluminum. The cross-sectional shape and size of the outer shell are the same as those of the busbar housing, and the length and width of the inner shell are 30±5mm smaller than the length and width of the outer shell. The outer shell and the inner shell are both welded by two L-shaped plates. Its shortcomings are: first, the upper and lower surfaces of the inner shell in this common box enclosed busbar shell expansion joint device are provided with outward flanges and the flanges are in contact with the inner wall of the shell. Since the flanges are in contact with the inner wall of the shell, a large noise will be emitted when the outer shell and the inner shell move relative to each other. In addition, this common box enclosed busbar shell expansion joint device has high requirements on the flatness of the inner wall of the shell, which greatly increases the processing difficulty and production cost. If the flatness of the inner wall of the shell is low, the friction force during the relative movement of the outer shell and the inner shell will be greatly increased. The increase in friction requires that the stress generated by the "thermal expansion and contraction" of the busbar copper bar is greater than the friction force before the outer shell and the inner shell will move relative to each other (the outer shell and the inner shell are pulled apart). In this way, the stress generated by the "thermal expansion and contraction" of the busbar copper bar before the outer shell and the inner shell are pulled apart may have damaged the supporting insulating parts. Utility Model Content

[0003] Design purpose: In order to avoid the shortcomings of the background technology, a busbar expansion joint and a busbar bridge structure for a switch cabinet are designed, which not only has better use effect, but also has lower use noise and high overall structural strength.

[0004] Design plan: To achieve the above design objectives.

[0005] 1. Four limit baffles are provided on the outer circumference of one end of the square tube body in the left telescopic section, and the four limit baffles form a "mouth"-shaped baffle frame, and four mounting plates 1 are provided on the outer circumference of the other end of the square tube body, and the four mounting plates 1 are distributed in a "mouth" shape, and the mounting plate 1 is provided with a plurality of through holes 1 that penetrate the front and back sides of the mounting plate 1; the right telescopic section is composed of a first square tube body section, a second square tube body section, a first round-shaped plate, a second round-shaped plate and four mounting plates 2, the aperture of the first square tube body section is larger than the aperture of the second square tube body section, a first round-shaped plate is provided at a port on one side of the first square tube body section, and a second round-shaped plate is provided at a port on the other side of the first square tube body section, and a second square tube body is provided on the outer side of the second round-shaped plate The utility model discloses a utility model which is a kind of utility model in which the outer peripheral surface of the outer end of the second square tube body segment is provided with four mounting plates 2, and the four mounting plates 2 are distributed in the shape of a "mouth". The mounting plate 2 is provided with a plurality of through holes 2, and the through holes 2 penetrate the front and back sides of the mounting plate 2, and the through hole size of the first round-shaped plate matches the cross-sectional size of the square tube body; the end of one side of the left telescopic section provided with a "mouth"-shaped baffle frame is located in the first square tube body segment, the size of the "mouth"-shaped baffle frame is larger than the size of the through hole of the first round-shaped plate, and the size of the "mouth"-shaped baffle frame is larger than the size of the through hole of the second round-shaped plate, and the design that the size of the "mouth"-shaped baffle frame is smaller than the size of the through hole of the first square tube body segment is one of the technical features of the utility model.The purpose of such a design is as follows: First, one end of the left expansion joint where the "mouth"-shaped retaining frame is provided is located inside the first square pipe section. The size of the "mouth"-shaped retaining frame is larger than the size of the through hole of the first ring-shaped plate and larger than the size of the through hole of the second ring-shaped plate. The size of the "mouth"-shaped retaining frame is smaller than the size of the through hole of the first square pipe section, that is, the "mouth"-shaped retaining frame does not contact the inner wall surface of the first square pipe section. In this way, when the left expansion joint and the right expansion joint move relatively, the use noise of the expansion joint of the switchgear bus bridge can be greatly reduced. In addition, since the "mouth"-shaped retaining frame does not contact the inner wall surface of the first square pipe section, not only is there no requirement for the flatness of the inner wall surface of the first square pipe section (which can reduce the production cost of the expansion joint), but also there is no contact friction between the "mouth"-shaped retaining frame and the inner wall surface of the first square pipe section. When the busbar copper bar generates stress due to "thermal expansion and contraction", the expansion joint can be pulled open more "sensitively", thus further reducing the risk of damage to the support insulator compared with the background technology, and its use effect is better. Second, the setting of the "mouth"-shaped retaining frame, the first ring-shaped plate and the second ring-shaped plate limits the "mouth"-shaped retaining frame between the first ring-shaped plate and the second ring-shaped plate during use. In this way, the left expansion joint and the right expansion joint will not separate during the expansion and contraction process. In addition, the "mouth"-shaped retaining frame has good structural strength. Third, since the size of the first square pipe section matches the outer contour size of the four mounting plates one distributed in a "mouth" shape (and also matches the outer contour size of the four mounting plates two distributed in a "mouth" shape), compared with the background technology, under the premise of not increasing the overall volume of the expansion joint, the internal space of the expansion joint is effectively increased, that is, the internal space of the expansion joint is more spacious, and thus the use effect of the expansion joint is also improved.

[0006] 2. The design that both the mounting plate one and the mounting plate two are made of angle steel, and the lower end surface of the bottom plate in the mounting plate two is welded to the corresponding surface of the second square pipe section and the inner side surface of the bottom plate is welded to the outer side surface of the second ring-shaped plate is the second technical feature of the present invention. The purpose of such a design is as follows: The mounting plate one and the mounting plate two made of angle steel have better structural strength in combination with the square pipe body. Further, the lower end surface of the bottom plate in the mounting plate two is welded to the corresponding surface of the second square pipe section and the inner side surface of the bottom plate is welded to the outer side surface of the second ring-shaped plate. In this way, the mounting plate two made of angle steel can also improve the bonding strength between the second square pipe section and the second ring-shaped plate, thus improving the overall structural strength of the expansion joint.

[0007] 3. The design that both the through hole one and the through hole two are strip-shaped holes is the third technical feature of the present invention. The purpose of such a design is as follows: Since both the through hole one and the through hole two are strip-shaped holes, it is convenient to connect the expansion joint with the bus bridge.

[0008] Technical Solution 1: A busbar expansion joint for a switch cabinet, comprising an expansion joint body consisting of a left expansion joint and a right expansion joint, wherein four limit baffles are arranged on the outer circumference of one end of the square tube body in the left expansion joint, and the four limit baffles form a "mouth"-shaped baffle frame, and four mounting plates 1 are arranged on the outer circumference of the other end of the square tube body, and the four mounting plates 1 are distributed in a "mouth" shape, and the mounting plate 1 is provided with a plurality of through holes 1 penetrating the front and back sides of the mounting plate 1; the right expansion joint is composed of a first square tube body section, a second square tube body section, a first round-shaped plate, a second round-shaped plate and four mounting plates 2, the aperture of the first square tube body section is larger than the aperture of the second square tube body section, a first round-shaped plate is arranged at a port on one side of the first square tube body section, and a second round-shaped plate is arranged at a port on the other side of the first square tube body section A second circular plate is provided, a second square tube section is provided on the outer side surface of the second circular plate, and the tube hole of the second square tube section is communicated with the through hole of the second circular plate, four mounting plates 2 are provided on the outer peripheral surface of the outer end of the second square tube section, and the four mounting plates 2 are distributed in a "mouth" shape, a plurality of through holes 2 are provided on the mounting plate 2, and the through holes 2 penetrate the front and back sides of the mounting plate 2, and the through hole size of the first circular plate matches the cross-sectional size of the square tube body; one side end of the left telescopic section provided with a "mouth"-shaped baffle frame is located in the first square tube section, the size of the "mouth"-shaped baffle frame is larger than the size of the through hole of the first circular plate, and the size of the "mouth"-shaped baffle frame is larger than the size of the through hole of the second circular plate, and the size of the "mouth"-shaped baffle frame is smaller than the size of the through hole of the first square tube section.

[0009] Technical Solution 2: A switch cabinet busbar bridge structure includes a first busbar bridge and a second busbar bridge, wherein a busbar expansion joint for the switch cabinet is provided between the first busbar bridge and the second busbar bridge.

[0010] Compared with the background technology, the utility model provides a busbar expansion joint for a switch cabinet and a busbar bridge structure for a switch cabinet, which not only has better use effect but also lower use noise, and at the same time has high overall structural strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 The present invention is a schematic diagram of the main structure of a busbar expansion joint for a switch cabinet.

[0012] Figure 2 yes Figure 1 Schematic diagram of the cross-sectional structure of AA.

[0013] Figure 3 yes Figure 1 Schematic diagram of the cross-sectional structure of BB.

[0014] Figure 4 yes Figure 1 Schematic diagram of the cross-sectional structure of CC.

[0015] Figure 5The utility model is a top view structural diagram of a busbar expansion joint for a switch cabinet.

[0016] Figure 6 It is a structural diagram of the busbar bridge structure of the switch cabinet.

[0017] Figure 7 It is a partial cross-sectional structural diagram of the busbar bridge structure of the switch cabinet. DETAILED DESCRIPTION

[0018] Example 1: Refer to the attached Figure 1-Figure 5 A busbar expansion joint for a switch cabinet, comprising an expansion joint body 1 consisting of a left expansion joint 2 and a right expansion joint 3, wherein four limit baffles 22 are arranged on the outer circumference of one end of a square tube body 21 in the left expansion joint 2, and the four limit baffles 22 form a "mouth"-shaped baffle frame, and four mounting plates 23 are arranged on the outer circumference of the other end of the square tube body 21, and the four mounting plates 23 are distributed in a "mouth" shape, and the mounting plates 23 are provided with a plurality of through holes 24 penetrating the front and back sides of the mounting plates 23; the right expansion joint 3 is composed of a first square tube body section 31, a second square tube body section 32, a first round-shaped plate 33, a second round-shaped plate 34 and four mounting plates 35, the aperture of the first square tube body section 31 is larger than the aperture of the second square tube body section 32, a first round-shaped plate 33 is arranged at a port on one side of the first square tube body section 31, and the other side end of the first square tube body section 31 is provided with a first round-shaped plate 33. A second round-shaped plate 34 is provided at the mouth, a second square tube segment 32 is provided on the outer surface of the second round-shaped plate 34, and the tube hole of the second square tube segment 32 is communicated with the through hole of the second round-shaped plate 34, four mounting plates 2 35 are provided on the outer peripheral surface of the outer end of the second square tube segment 32, and the four mounting plates 2 35 are distributed in the shape of a "mouth", a plurality of through holes 2 36 are provided on the mounting plate 2 35, and the through holes 2 36 pass through the front and back sides of the mounting plate 2 35, and the through hole size of the first round-shaped plate 33 matches the cross-sectional size of the square tube body 21; one side end of the left telescopic joint 2 provided with a "mouth"-shaped baffle frame is located in the first square tube segment 31, the size of the "mouth"-shaped baffle frame is larger than the size of the through hole of the first round-shaped plate, and the size of the "mouth"-shaped baffle frame is larger than the size of the through hole of the second round-shaped plate, and the size of the "mouth"-shaped baffle frame is smaller than the size of the through hole of the first square tube segment.

[0019] The mounting plate 1 23 and the mounting plate 2 35 are both made of angle steel. The lower end surface of the bottom plate in the mounting plate 2 35 is welded to the corresponding surface of the second square tube section 32, and the inner side surface of the bottom plate is welded to the outer side surface of the second round plate 34. The through hole 1 24 and the through hole 2 3 are both strip holes. The length of the first square tube section 31 is not less than 45 mm.

[0020] During production, first, four limiting baffles 22 are welded on the outer peripheral surface of one end of the square tube body 21, and the four limiting baffles 22 form a "mouth"-shaped retaining frame. Then, the first return-shaped plate 33 is welded at one side port of the first square tube body section 31. After that, the other end of the square tube body 21 (the end without the "mouth"-shaped retaining frame welded) is inserted into the other side port of the first square tube body section 31 (the end without the first return-shaped plate 33 welded), and the other end of the square tube body 21 (the end without the "mouth"-shaped retaining frame welded) extends out of the first square tube body section 31 after passing through the through hole of the first return-shaped plate 33. At this time, the "mouth"-shaped retaining frame is located inside the first square tube body section 31. Then, four first mounting plates 23 (i.e., welding 4 angle steels) are welded on the outer peripheral surface of the other end of the square tube body 21 (the end without the "mouth"-shaped retaining frame welded). After that, a second return-shaped plate 34 is welded at the other side port of the first square tube body section 31 (the end without the first return-shaped plate 33 welded). Then, a second square tube body section 32 is welded on the outer side surface of the second return-shaped plate 34. Then, four second mounting plates 35 (i.e., welding 4 angle steels) are welded on the outer peripheral surface of the outer end of the second square tube body section 32. In this way, a movable telescopic switchgear busbar bridge expansion joint is formed.

[0021] Embodiment 2: On the basis of Embodiment 1, refer to the attached Figure 6-Figure 7 A switchgear busbar bridge structure includes a first busbar bridge and a second busbar bridge, and a busbar expansion joint for switchgear is provided between the first busbar bridge 4 and the second busbar bridge 5.

[0022] Inside the first busbar bridge 4, a first copper bar 7 is provided through a plurality of insulators 6. Inside the second busbar bridge 5, a second copper bar 8 is provided through a plurality of insulators 6. The first copper bar 7 and the second copper bar 8 are connected through a copper braid 9, and the copper braid 9 is located inside the expansion joint body 1. The insulator 6 is a support insulating member.

[0023] It should be understood that: Although the above embodiments have made relatively detailed written descriptions of the design concept of the present invention, these written descriptions are only simple written descriptions of the design concept of the present invention, rather than limitations on the design concept of the present invention. Any combination, addition, or modification that does not exceed the design concept of the present invention falls within the protection scope of the present invention.

Claims

1. A busbar expansion joint for a switch cabinet, comprising an expansion joint body (1) consisting of a left expansion joint (2) and a right expansion joint (3), wherein: Four limit baffles (22) are provided on the outer circumference of one end of the square tube body (21) in the left telescopic section (2), and the four limit baffles (22) form a "mouth"-shaped baffle frame; four mounting plates (23) are provided on the outer circumference of the other end of the square tube body (21); the four mounting plates (23) are distributed in a "mouth" shape, and the mounting plates (23) are provided with a plurality of through holes (24) penetrating the front and back sides of the mounting plates (23); the right telescopic section (3) is composed of a first square tube body section (31), a second square tube body section (32), a first round-shaped plate (33), a second round-shaped plate (34) and four mounting plates (35); the aperture of the first square tube body section (31) is larger than the aperture of the second square tube body section (32); a first round-shaped plate (33) is provided at one end of the first square tube body section (31), and a second round-shaped plate (34) is provided at the other end of the first square tube body section (31). A second square tube section (32) is provided on the outer surface of the second circular plate (34), and the tube hole of the second square tube section (32) is communicated with the through hole of the second circular plate (34); four mounting plates (35) are provided on the outer peripheral surface of the outer end of the second square tube section (32), and the four mounting plates (35) are distributed in a "mouth" shape; a plurality of through holes (36) are provided on the mounting plate (35), and the through holes (36) penetrate the front and back sides of the mounting plate (35); the through hole size of the first circular plate (33) matches the cross-sectional size of the square tube (21); one end of the left telescopic section (2) provided with a "mouth"-shaped retaining frame is located in the first square tube section (31); the size of the "mouth"-shaped retaining frame is larger than the size of the through hole of the first circular plate, and the size of the "mouth"-shaped retaining frame is larger than the size of the through hole of the second circular plate, and the size of the "mouth"-shaped retaining frame is smaller than the size of the through hole of the first square tube section.

2. The busbar expansion joint for a switch cabinet according to claim 1 is characterized in that: The first mounting plate (23) and the second mounting plate (35) are both made of angle steel.

3. The busbar expansion joint for a switch cabinet according to claim 2 is characterized in that: The lower end surface of the bottom plate in the second mounting plate (35) is welded to the corresponding surface of the second square tube section (32), and the inner side surface of the bottom plate is welded to the outer side surface of the second circular plate (34).

4. A busbar expansion joint for a switch cabinet according to claim 1 or 2, characterized in that: The through hole 1 (24) and the through hole 2 (36) are both bar-shaped holes.

5. A busbar expansion joint for a switch cabinet according to claim 1 or 2, characterized in that: The length of the first square tube section (31) is not less than 45 mm.

6. A switch cabinet busbar bridge structure, comprising a first busbar bridge and a second busbar bridge, characterized in that: A busbar expansion joint for a switch cabinet according to any one of claims 1 to 4 is provided between the first busbar bridge (4) and the second busbar bridge (5).

7. The switch cabinet busbar bridge structure according to claim 6 is characterized in that: A copper bar 1 (7) is provided in the first busbar bridge (4) via a plurality of insulators (6), and a copper bar 2 (8) is provided in the second busbar bridge (5) via a plurality of insulators (6). The copper bar 1 (7) and the copper bar 2 (8) are connected via a copper braided belt (9), and the copper braided belt (9) is located in the expansion joint body (1).

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