Multi-contact-surface type joint structure and high-voltage switchgear

Abstract

The utility model relates to the technical field of power distribution equipment, and provides a multi-contact-surface type joint structure, which comprises a main busbar provided with three busbar wires; the switching branch row group comprises three switching flat cables; the three switching flat cables and the three bus flat cables are sequentially crossed and lapped, and the lapping positions of the switching flat cables and the bus flat cables are in surface contact connection; the phase branch row group is provided with a bridge outlet end and a contact box end; comprising at least two branch flat cables; two gaps with the same thickness are formed among the three switching flat cables, and at least one branch flat cable enters the gaps. Therefore, according to the utility model, a plurality of clinging contact surfaces are respectively formed at the connecting parts, so that the number of current conducting surfaces is obviously increased, and the current intensity and the heat productivity of the contact surfaces are reduced. According to the utility model, the structure is simple, and the existing structure with a single lap joint surface is improved into the structure with a plurality of lap joint surfaces for dispersive heating, so that the safety is improved. The utility model also provides a high-voltage switch device.

Description

Technical Field

[0001] The utility model belongs to the technical field of power distribution equipment, and in particular relates to a multi-contact surface type joint structure and a high-voltage switchgear. Background Art

[0002] As disclosed in Chinese patent CN209929839U, combined with Figure 1 In the existing switch cabinet, the main busbars 1 of the three phases A, B and C are horizontally arranged in the busbar chamber 61, and the main busbar 1 of each phase is connected to the phase branch bar group 2 of each phase through the transfer branch bar group 3. The upper end and the lower end of the phase branch bar group 2 of each phase form a bridge end 21 and a contact box end 22 respectively.

[0003] See also Figure 2 The existing joint structure of the transfer branch group 3 and the phase branch group 2 has only one contact surface, and all currents flow through this contact surface, and the heat generated is also concentrated on this contact surface. In a low current system, this structure can meet the requirements, but for a high current system, this structure has only one current conducting surface, which can easily cause serious heating at the overlap surface, and long-term operation will damage the insulation of the equipment and even burn the equipment.

[0004] In summary, the prior art obviously has inconveniences and defects in practical use, so it is necessary to improve it. Utility Model Content

[0005] In view of the above-mentioned defects, the utility model mainly provides a multi-contact surface type joint structure to solve the technical problems of the joint structure having few guiding surfaces and concentrated heat.

[0006] In order to solve the above problems, the utility model provides a multi-contact surface type joint structure, comprising:

[0007] The main busbar has three busbars arranged at equal intervals;

[0008] A transfer branch bar group, one end of which is connected to the main busbar, and the other end is connected to the phase branch bar group; the transfer branch bar group has three transfer cables; the three transfer cables are cross-connected with the three busbars in sequence, and the overlapping positions of the transfer cables and the busbars form surface contact connections;

[0009] The phase branch row group has a bridge end and a contact box end; the phase branch row group includes at least two branch row wires; two gaps of the same thickness are formed between the three transfer row wires, and at least one branch row wire enters the gap; the branch row wires entering the gap form surface contact connection with the two adjacent branch row wires respectively;

[0010] The other ends of the three transfer cables extend to form a bridge output end and / or a contact box end of the phase branch group.

[0011] According to the multi-contact surface type connector structure of the utility model, the thickness of the branch cable is the same as that of the adapter cable; the thickness of the gap is the same as that of the adapter cable.

[0012] According to the multi-contact surface connector structure of the utility model, the phase branch row group has two branch row wires, one end of one branch row wire enters the gap, and the other end of the branch row wire extends to form the contact box end; the two ends of the other branch row wire respectively form the bridge end and the contact box end;

[0013] Among the three transfer cables of the transfer branch group, one end of two transfer cables extends to form the bridge end, and one end of the other transfer cable extends to form the contact box end.

[0014] According to the multi-contact surface type joint structure of the utility model, the two transfer cables and the branch cables at the bridge outlet are both fixed on the insulator.

[0015] According to the multi-contact surface connector structure of the utility model, the two adapter cables and the branch cables form two gaps of equal thickness, and a gasket is respectively arranged in each gap.

[0016] According to the multi-contact surface joint structure of the utility model, the material of the gasket is nylon.

[0017] According to the multi-contact surface type connector structure of the utility model, a gasket is further provided in the gap formed by the three adapter cables; the upper and lower surfaces of the gasket both form a surface contact connection with the corresponding adapter cables.

[0018] According to the multi-contact surface joint structure of the utility model, the gasket is made of metal; a plurality of supporting heads are respectively arranged on the upper and lower surfaces of the gasket; and a plurality of heat dissipation holes are opened on the gasket.

[0019] According to the multi-contact surface connector structure of the utility model, the phase branch row group has four branch cables; the three transfer cables of the transfer branch row group, one end of one of the transfer cables extends to form the contact box end, and the transfer cable is tightly connected with two of the branch cables in sequence to form the contact box end;

[0020] The other two transfer cables and the other two of the four branch cables are cross-jointed in sequence, and the overlapping positions form a surface contact connection; and the other ends of the two branch cables involved in the overlapping form the bridge outlet end;

[0021] The other end of the outermost one of the two branch cables at the contact box end forms the bridge end.

[0022] A high-voltage switchgear comprises a cabinet body, wherein a busbar chamber is arranged in the cabinet body; the busbar chamber is provided with a main busbar of three phases A, B and C, and a phase branch bar group connected to the main busbar of the corresponding phase; the multi-contact surface type joint structure is formed between the main busbar of each phase and the phase branch bar group.

[0023] In summary, the utility model forms a plurality of close-fitting contact surfaces at the connection parts between the transfer branch bar group and the main busbar and the phase branch bar group. Compared with the prior art, the number of current conduction surfaces is significantly increased, and the current intensity and heat generation of each contact surface are reduced. The contact surfaces are dispersed to avoid heat concentration. The utility model has a simple structure, and improves the existing single overlap surface structure into a dispersed heat generation of multiple overlap surfaces, thereby improving safety. The utility model also provides a high-voltage switchgear having the aforementioned joint structure, which optimizes the connection method between the main busbar and the phase branch bar group, improves the heat dissipation performance, and satisfies the insulation requirements of the large current system. And the overall size remains unchanged, saving manufacturing materials and reducing floor space. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the prior art;

[0025] Figure 2 yes Figure 1 Schematic diagram of the structure of each phase joint;

[0026] Figure 3 It is a structural schematic diagram of an embodiment of the multi-contact surface type joint structure of the utility model;

[0027] Figure 4 yes Figure 3 Schematic diagram of the structure of the middle A area;

[0028] Figure 5 It is a structural schematic diagram of an embodiment of the multi-contact surface type joint structure of the utility model;

[0029] Figure 6 It is a structural schematic diagram of the high voltage switchgear of the utility model;

[0030] Figure 7 yes Figure 6 A schematic diagram of a top view structure;

[0031] In the figure: 1-main busbar, 11-busbar wire, 12-contact box; 2-phase branch busbar group, 21-bridge outlet end, 22-contact box end, 23-branch busbar wire; 3-transfer branch busbar group, 31-transfer busbar wire, 32-connector bolt; 4-gasket, 41-support head, 42-heat dissipation hole; 5-insulator, 6-cabinet, 61-busbar chamber. DETAILED DESCRIPTION

[0032] See also Figure 3 The utility model provides a multi-contact surface joint structure, comprising:

[0033] A main busbar 1 having three busbar lines 11 arranged at equal intervals;

[0034] A transfer branch bar group 3, one end of which is connected to the main busbar 1, and the other end is connected to the phase branch bar group 2; the transfer branch bar group 3 has three transfer cables 31; the three transfer cables 31 are cross-connected with the three busbars 11 in sequence, and the overlapping positions of the transfer cables 31 and the busbars 11 form a surface contact connection;

[0035] Compared with the joint structure of the prior art, the utility model forms five lap joints between one end of the three transfer cables 31 and the three busbars 11, that is, the current conduction surfaces of the main busbar 1 and the transfer branch busbar group 3 are increased to five. The current intensity flowing through each lap joint is reduced, and the heat generated by each lap joint is reduced. The existing single lap joint structure is improved to dispersed heat generation of multiple lap joints, which improves safety.

[0036] The phase branch row group 2 has a bridge end 21 and a contact box end 22; the phase branch row group 2 includes at least two branch row wires 23; two gaps of the same thickness are formed between the three transfer row wires 31, and at least one branch row wire 23 enters the gap; the branch row wire 23 entering the gap forms a surface contact connection with two adjacent branch row wires 23 respectively;

[0037] The other ends of the three transfer cables 31 extend to form the bridge outlet end 21 and / or the contact box end 22 of the phase branch array 2;

[0038] As a preferred solution, the branch cable 23 of the present invention has the same thickness as the adapter cable 31; further, the thickness of the gap is the same as the thickness of the adapter cable 31;

[0039] Embodiment 1:

[0040] As an embodiment, the phase branch row group 2 of the utility model has two branch row wires 23, one end of which enters the gap, and the other end of the branch row wire 23 extends to form the contact box end 22; the two ends of the other branch row wire 23 respectively form the bridge end 21 and the contact box end 22;

[0041] The three transfer cables 31 of the transfer branch group 3, one end of two of the transfer cables 31 extends to form the bridge outlet end 21, and one end of the other transfer cable 31 extends to form the contact box end 22;

[0042] The bridge end 21 is formed by two adapter cables 31 and one branch cable 23, and the two adapter cables 31 and the branch cable 23 form two gaps of the same thickness, which is conducive to heat dissipation. At the same time, the two adapter cables 31 can directly transmit current to the bridge end 21, without contact surface in the middle to guide the current, reducing the heat generation.

[0043] Furthermore, the two adapter cables 31 and the branch cables 23 forming the bridge end 21 are fixed on the insulator 5; better yet, the two adapter cables 31 and the branch cables 23 form two gaps of equal thickness, and a gasket 4 is provided in each gap; the gasket 4 is used to maintain the thickness of the gap to ensure the heat dissipation effect.

[0044] Optionally, the gasket 4 may be made of nylon, which only plays a supporting role, does not conduct current, and does not prevent heat generated by current.

[0045] The contact box end 22 is formed by a transfer cable 31 and two branch cables 23, and the three are closely connected in sequence; the current flows and is transmitted from the contact surface.

[0046] In this embodiment, multiple contact surfaces for current flow are formed in the gaps between the three transfer cables 31 and the contact box end 22. The contact surfaces are dispersed, and each contact surface has low heat generation, which improves safety performance. There is no contact surface at the bridge end 21, which avoids the heating of the current and further reduces the heat generation.

[0047] As a preferred solution, a gasket 4 is further provided in the gap formed by the three adapter cables 31; the upper and lower surfaces of the gasket 4 are both in surface contact connection with the corresponding adapter cables 31;

[0048] The gasket 4 is preferably made of metal, which has good heat conduction and heat dissipation functions while supporting the gap. Since there is no current conduction between the two adapter cables 31, the gasket 4 can be made of a material with high strength and good thermal conductivity, such as steel, cast iron, aluminum alloy or copper.

[0049] See also Figure 4 As an embodiment of the gasket 4, a plurality of support heads 41 are respectively provided on the upper and lower surfaces of the gasket 4; the support heads 41 abut against the adapter cable 31 or the branch cable 23 to form a small gap, which is conducive to heat dissipation.

[0050] Furthermore, the gasket 4 is provided with a plurality of heat dissipation holes 42, thereby improving the heat dissipation efficiency.

[0051] As an implementation mode, the utility model also has a joint bolt 32, and the joint bolt 32 is used to penetrate and fix the relevant wiring or components at the position with the contact surface to form a tightly fitting contact surface, which can reduce the contact resistance and reduce the heat generated by the current flow.

[0052] Optionally, the joint bolt 32 may be used at the connection position between the busbar cable 11 and the adapter cable 31;

[0053] Optionally, the joint bolt 32 may also be used at the connection position between the adapter cable 31 and the branch cable 23 and the gasket 4 .

[0054] Embodiment 2:

[0055] See also Figure 5 As an embodiment, the phase branch row group 2 of the utility model has four branch cables 23; the three transfer cables 31 of the transfer branch row group 3, one end of which is extended to form the contact box end 22, and the transfer cable 31 is tightly connected with two of the branch cables 23 in sequence to form the contact box end 22;

[0056] The other two transfer cables 31 and the other two of the four branch cables 23 are cross-connected in sequence, and the overlapping positions form a surface contact connection; and the other ends of the two branch cables 23 involved in the overlapping form the bridge end 21;

[0057] The outermost one of the two branch cables 23 of the contact box end 22 has the other end forming the bridge end 21;

[0058] The bridge outlet end 21 and the contact box end 22 of this embodiment respectively have contact surfaces for current conduction, the heat dissipation points are distributed, and the heat generation of each contact surface is low.

[0059] As a preferred solution, the three branch cables 23 at the bridge end 21 form two gaps of equal thickness, and a gasket 4 is arranged in each gap to ensure the heat dissipation effect.

[0060] The multi-contact surface joint structure of the utility model forms multiple close-fitting contact surfaces at the connection parts of the transfer branch group 3 and the main busbar 1 and the phase branch group 2. Compared with the prior art, the number of current conducting surfaces is significantly increased, and the current intensity and heat generation of each contact surface are reduced. The contact surfaces are dispersed to avoid heat concentration. The utility model has a simple structure, and improves the existing single overlap surface structure to dispersed heat generation of multiple overlap surfaces, thereby improving safety.

[0061] See also Figure 6 and Figure 7 ,The utility model also provides a high-voltage switchgear, comprising a cabinet 6, wherein a busbar chamber 61 is provided in the cabinet 6;

[0062] The busbar chamber 61 is provided with a main busbar 1 of three phases A, B, and C, and a phase branch busbar group 2 connected to the main busbar 1 of the corresponding phase;

[0063] The multi-contact surface joint structure is formed between the main busbar 1 of each phase and the phase branch busbar group 2.

[0064] A contact box 12 is provided in the cabinet 6 , and the contact box end 22 of the phase branch bank group 2 is inserted and connected in the contact box 12 , and the bridge end 21 extends upward to the outside of the top of the cabinet 6 .

[0065] Those skilled in the art can adaptively select the structure of the above embodiment according to the actual space and wiring requirements in the busbar chamber 61 and apply it to the three phases A, B, and C. The joint structures of the three phases can be the same or different.

[0066] For example, the A phase and the B phase use the joint structure of the first embodiment, and the C phase uses the joint structure of the second embodiment.

[0067] The high-voltage switchgear of the utility model uses the above-mentioned joint structure, optimizes the connection mode between the main busbar 1 and the phase branch bar group 2, improves the heat dissipation performance, and satisfies the insulation requirements of the large current system, such as the requirements of the 10KV power supply switchgear. Compared with the existing switchgear, its overall size remains unchanged, there is no need to increase the volume of the cabinet 6, saves manufacturing materials and reduces the occupied space.

[0068] In summary, the utility model provides a multi-contact surface type joint structure, by forming a plurality of close-fitting contact surfaces at the connection parts between the transfer branch bar group and the main busbar and the phase branch bar group. Compared with the prior art, the number of current conduction surfaces is significantly increased, and the current intensity and heat generation of each contact surface are reduced. The contact surfaces are dispersedly arranged to avoid heat concentration. The utility model has a simple structure, and improves the existing single lap surface structure into a dispersed heat generation of multiple lap surfaces, thereby improving safety. The utility model also provides a high-voltage switchgear, having the aforementioned joint structure, optimizing the connection method between the main busbar and the phase branch bar group, and improving the heat dissipation performance, so that it meets the insulation requirements of the large current system. And the overall size remains unchanged, saving manufacturing materials and reducing floor space.

[0069] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, technicians familiar with the field can make various corresponding changes and deformations based on the present invention, but these corresponding changes and deformations should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. A multi-contact surface joint structure, characterized in that: include: The main busbar has three busbars arranged at equal intervals; A transfer branch group, one end of which is connected to the main busbar and the other end is connected to the phase branch group; The transfer branch cable group has three transfer cables; The three adapter cables are cross-connected with the three bus cables in sequence, and the overlapping positions of the adapter cables and the bus cables all form surface contact connections; The phase branch row group has a bridge end and a contact box end; the phase branch row group includes at least two branch row wires; two gaps of the same thickness are formed between the three transfer row wires, and at least one branch row wire enters the gap; the branch row wires entering the gap form surface contact connection with the two adjacent branch row wires respectively; The other ends of the three transfer cables extend to form a bridge output end and / or a contact box end of the phase branch group.

2. The multi-contact surface joint structure according to claim 1, characterized in that: The thickness of the branch cable is the same as that of the adapter cable; the thickness of the gap is the same as that of the adapter cable.

3. The multi-contact surface joint structure according to claim 1, characterized in that: The phase branch row group has two branch row wires, one end of one of the branch row wires enters the gap, and the other end of the branch row wire extends to form the contact box end; the two ends of the other branch row wire respectively form a bridge end and a contact box end; Among the three transfer cables of the transfer branch group, one end of two transfer cables extends to form the bridge end, and one end of the other transfer cable extends to form the contact box end.

4. The multi-contact surface joint structure according to claim 3, characterized in that: The two transfer cables and the branch cables at the bridge outlet are both fixed on the insulator.

5. The multi-contact surface joint structure according to claim 4, characterized in that: The two transfer cables and the branch cables form two gaps of equal thickness, and a gasket is respectively arranged in each gap.

6. The multi-contact surface joint structure according to claim 5, characterized in that: The material of the gasket is nylon.

7. The multi-contact surface joint structure according to claim 1, characterized in that: A gasket is further provided in the gap formed by the three transfer cables; the upper and lower surfaces of the gasket are both in surface contact connection with the corresponding transfer cables.

8. The multi-contact surface joint structure according to claim 7, characterized in that: The gasket is made of metal; a plurality of supporting heads are respectively arranged on the upper and lower surfaces of the gasket; and a plurality of heat dissipation holes are opened on the gasket.

9. The multi-contact surface joint structure according to claim 1, characterized in that: The phase branch row group has four branch cables; one end of one of the three transfer cables of the transfer branch row group extends to form the contact box end, and the transfer cable is tightly connected with two of the branch cables in sequence to form the contact box end; The other two transfer cables and the other two of the four branch cables are cross-jointed in sequence, and the overlapping positions form a surface contact connection; and the other ends of the two branch cables involved in the overlapping form the bridge outlet end; The other end of the outermost one of the two branch cables at the contact box end forms the bridge end.

10. A high-voltage switchgear, comprising a cabinet, wherein a busbar chamber is provided in the cabinet; wherein the busbar chamber is provided with a main busbar of three phases A, B, and C, and a phase branch busbar group connected to the main busbar of the corresponding phase; characterized in that: A multi-contact surface joint structure as claimed in any one of claims 1 to 9 is formed between the main busbar of each phase and the phase branch bar group.

Images