Rapid connection device for temperature rise test of ring main unit

Abstract

The utility model relates to the technical field of power equipment test equipment, in particular to a ring main unit temperature rise test quick connection device which comprises a fixed gas box detachably installed on a ring main unit through a fastener, the fixed gas box is filled with insulating gas, and a plurality of first side expansion sleeves are arranged on the side wall, making contact with the ring main unit, of the fixed gas box at intervals. The fixed air box is provided with wire inlet sleeves which are symmetrically distributed with the first side expansion sleeves and are in one-to-one correspondence with the first side expansion sleeves, conductive parts are jointly inserted into the first side expansion sleeves and the wire inlet sleeves, bus connectors are inserted into the ends, extending out of the first side expansion sleeves, of the conductive parts, and the other ends of the conductive parts are sleeved with first copper bars located outside the wire inlet sleeves. The quick connecting device is a connecting mechanism designed by an independent box body, and the bus connector is adopted at the joint of the quick connecting device and the to-be-tested complete ring main unit, so that the connection is convenient and reliable. And the connection with the power supply side is convenient and reliable by using the copper bar 1. The quick connecting device is light in weight and convenient to disassemble, assemble and move, the working efficiency is greatly improved, and the cost is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of power equipment testing equipment, and in particular to a quick connection device for temperature rise testing of a ring network cabinet. Background Art

[0002] The primary and secondary integrated ring network box is a device in the power distribution system. It is a complete set of equipment consisting of a primary and secondary integrated ring network cabinet, a high-voltage incoming line cabinet, a low-voltage incoming line cabinet, and corresponding power distribution, protection and control equipment. The primary and secondary integrated ring network box integrates the power distribution, protection and control equipment on the primary and secondary sides in one box to achieve complete power distribution of the power system. At the same time, the high-voltage incoming line cabinet and the low-voltage incoming line cabinet can be separated from the primary and secondary integrated ring network cabinet for easy maintenance and upgrading. The primary and secondary integrated ring network box is usually composed of a high-voltage incoming line cabinet, a high-voltage disconnector, a high-voltage load switch, a transformer, a low-voltage load switch, a protection device, a control device, and a measuring device. It can realize the distribution, regulation, protection and control of the power system and improve the reliability and safety of the power system. The primary and secondary integrated ring network box is usually used in places such as urban power grids, industrial electricity and large buildings, and is one of the indispensable distribution equipment in the power system.

[0003] At present, most gas-insulated ring main units on the market need to undergo fault and safety tests during development, and temperature rise is an important indicator that affects the safety performance of switchgear. If the temperature inside the switchgear rises too quickly, the physical and chemical properties of the component materials will change, and the mechanical and electrical properties will deteriorate, leading to faults and even serious accidents. Therefore, it is necessary to conduct temperature rise tests on the switchgear, i.e. the above-mentioned ring main unit, to monitor the temperature changes inside the equipment.

[0004] However, due to the particularity of the ring main unit side expansion casing structure, it is difficult to transmit power. The existing solution is: use another side expansion solution complete ring main unit A to connect with the complete ring main unit B to be tested, and perform power supply test through the inlet and outlet interface of ring main unit B. Since each test requires hoisting the complete ring main unit A and the ring main unit to be tested to connect, the operation is complicated, time-consuming and labor-intensive, and the detection efficiency is low, which increases the cost of the enterprise.

[0005] To this end, the present application provides a quick connection device for temperature rise testing of a ring main unit, which does not require reciprocating lifting, has convenient and reliable electrical connection, and can improve work efficiency. Utility Model Content

[0006] The purpose of the present application is to solve the problems existing in the prior art and to propose a quick connection device for temperature rise testing of a ring main unit.

[0007] In order to achieve the above purpose, this application adopts the following technical solutions:

[0008] A quick connection device for temperature rise testing of a ring network cabinet comprises a fixed gas box detachably mounted on the ring network cabinet via fasteners, the fixed gas box is filled with insulating gas, a plurality of side expansion sleeves are arranged at intervals on a side wall of the fixed gas box in contact with the ring network cabinet, an incoming line sleeve is arranged on the fixed gas box and symmetrically distributed with and one-to-one corresponding to the side expansion sleeve, a conductive part is inserted into both the side expansion sleeve and the incoming line sleeve, a busbar connector is inserted into the end of the conductive part extending out of the side expansion sleeve, and a copper busbar located outside the incoming line sleeve is sleeved on the other end.

[0009] Preferably, the side wall of the fixed air box is also provided with an explosion-proof valve and an air intake valve.

[0010] Preferably, the upper end surface of the fixed air box is welded and fixed with a cabinet-connecting reinforcement rib, and the ring network cabinet is welded with an installation reinforcement rib, and the cabinet-connecting reinforcement rib and the installation reinforcement rib are connected via fasteners.

[0011] Preferably, the conductive member includes a cable post 1 embedded in a side expansion bushing 1, a conductive post embedded in an incoming line bushing, and a copper bus 2, and the cable post 1 and the conductive post are connected to both ends of the copper bus 2 via wires respectively.

[0012] Preferably, a side wall of the side expansion sleeve and one end of the conductive column extending into the fixed air box are both threaded with a connector, the connector on the side expansion sleeve is connected to cable column one, and both suspended ends of the connectors are connected to wires, and the two wires are respectively connected to both ends of copper busbar two.

[0013] Preferably, the distance between two adjacent copper bars is greater than 120 mm.

[0014] Preferably, the insulating gas is sulfur hexafluoride gas.

[0015] Preferably, the conductive column is a copper rod.

[0016] Compared with the prior art, the present application provides a ring main unit temperature rise test quick connection device, which has the following beneficial effects:

[0017] This quick connection device is a connection mechanism designed for a separate box. The busbar connector is used at the connection with the ring main unit to be tested, which is convenient and reliable. The copper busbar is used to connect with the power supply side, which is also convenient and reliable. This quick connection device is light in weight, easy to disassemble and move, greatly improving work efficiency and reducing costs.

[0018] Other advantages, objectives and features of the present application will be described in the following description to some extent; and will be apparent to those skilled in the art based on the following examination and study to some extent; or, may be taught from the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1This is a three-dimensional schematic diagram of the connection device of the present application installed on the ring main unit.

[0020] Figure 2 For this application Figure 1 Schematic cross-sectional view of .

[0021] Figure 3 For this application Figure 2 Partial cross-sectional view of the connection location between the connecting device and the ring main unit.

[0022] Figure 4 This is a schematic diagram of the connection between the inner expanded sleeve 1 of the connection device of the present application and the inner expanded sleeve 2 of the ring network cabinet.

[0023] Figure 5 This is a left-side stereoscopic schematic diagram of the connecting device of the present application.

[0024] Figure 6 For this application Figure 5 Schematic cross-sectional view of .

[0025] Figure 7 It is a three-dimensional schematic diagram of the connection between the side expansion sleeve 1 and the incoming line sleeve of the present application.

[0026] Figure 8 It is a right-side stereoscopic schematic diagram of the connecting device of the present application.

[0027] Fig. 9 This is a three-dimensional schematic diagram of the ring main unit of this application.

[0028] In the figure: 1. Ring main unit; 2. Fixed gas box; 3. Side expansion bushing 1; 4. Inlet bushing; 5. Copper busbar 1; 6. Busbar connector; 7. Side expansion bushing 2; 8. Explosion-proof valve; 9. Cable column 1; 10. Conductive column; 11. Copper busbar 2; 12. Cabinet reinforcing ribs. DETAILED DESCRIPTION

[0029] The following will be combined with the attached examples of the present application Figure 1-9 , the technical solutions in the embodiments of the present application are described clearly and completely. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments.

[0030] In order to solve the problems existing in the prior art, the present embodiment provides a quick connection device for temperature rise testing of a ring network cabinet, including a fixed gas box 2 that can be detachably installed on the ring network cabinet 1 through fasteners, the fixed gas box 2 is filled with insulating gas, and a plurality of side expansion sleeves 3 are arranged on the side wall of the fixed gas box 2 that contacts the ring network cabinet 1, and an incoming line sleeve 4 is provided on the fixed gas box 2 and is symmetrically distributed and one-to-one corresponding to the side expansion sleeve 3. A conductive part is commonly inserted in the side expansion sleeve 3 and the incoming line sleeve 4, and a busbar connector 6 is inserted at the end of the conductive part extending out of the side expansion sleeve 3, and a copper bus 5 located outside the incoming line sleeve 4 is sleeved on the other end.

[0031] Principle details of this embodiment:

[0032] A ring network cabinet temperature rise test quick connection device comprises a fixed gas box 2, a plurality of side expansion sleeves 3, a plurality of incoming line sleeves 4, a conductive part, and a copper busbar.

[0033] The fixed gas box 2 is a closed box made of 3.0mm high-quality stainless steel by cutting, bending and welding. The stainless steel material has a certain conductivity, and the fixed gas box 2 is filled with insulating gas. The two phases cooperate to reduce the risk of electrical leakage of the connection device. The fixed gas box 2 can be detachably installed on the ring network cabinet 1 through fasteners. Compared with the hoisting method, this method is more direct and does not require other equipment such as cranes. The installation operation is more convenient, thereby improving the installation efficiency.

[0034] The side expansion sleeve 3 and the incoming line sleeve 4 are both made of insulating materials, such as rubber. A plurality of embedded holes are provided at intervals on the two opposite end faces of the fixed air box 2. The side expansion sleeve 3 is embedded in one of the embedded holes, and the incoming line sleeve 4 is embedded in the other embedded hole. The side expansion sleeve 3 is completely in the fixed air box 2, and the incoming line sleeve 4 passes through the side wall of the fixed air box 2. Sealing rings are provided on the end face of the side expansion sleeve 3 and the side wall of the incoming line sleeve located in the fixed air box 2. At the same time, there are threaded holes in an annular array on the sealing ring, and the side wall of the fixed air box 2 is provided with through holes corresponding to the threaded holes. Screws are screwed into the threaded holes to fasten the side expansion sleeve 3 and the incoming line sleeve 4 to the fixed air box 2; and the sealing rings are used to seal the side expansion sleeve 3, the incoming line sleeve 4 and the embedded holes to prevent leakage of insulating gas.

[0035] The two ends of the conductive part extend from the side expansion sleeve 13 and the opposite end of the incoming line sleeve 4 respectively. And the end of the conductive part extending out of the side expansion sleeve 13 is plugged with a busbar connector 6, and the ring network cabinet 1 is provided with a side expansion sleeve 27 that cooperates with the busbar connector 6, and the side expansion sleeve 27 is connected to the internal equipment of the ring network cabinet 1. The side expansion sleeve 13 and the side expansion sleeve 27 have exactly the same structure. The end of the conductive part extending out of the incoming line sleeve 4 is embedded with a copper bar 15, and the copper bar 15 is located outside the fixed air box 2. A screw is screwed on the end of the conductive part, and the screw rests on the side wall of the copper bar 15, thereby fastening the copper bar to the conductive part. The copper bar 15 can be detachably installed, which is also convenient for later maintenance and replacement.

[0036] The side expansion bushing 3 is a side expansion busbar used in the standardized customized solution of the 12KV ring network cabinet 1. The incoming line bushing 4 is an incoming line bushing 4 used in the standardized customized solution of the 12KV ring network cabinet 1.

[0037] During installation, apply the corresponding conductive paste on the surface of the busbar connector 6 and the inner walls of the side expansion sleeve 1 3 and the side expansion sleeve 2 7. Pay attention to squeeze the busbar connector 6 into the side expansion sleeve 2 7 on the ring network cabinet 1; then lift the fixed gas box 2, align the side expansion sleeve 1 3 with the port of the busbar connector 6, and then push the fixed gas box 2, embed the other end of the busbar connector 6 into the side expansion sleeve 1 3, and complete the connection between the connecting device and the electrical equipment inside the ring network cabinet 1. The busbar connector 6 is firmly fixed by the mutual squeezing effect between the side expansion sleeve 1 3 and the side expansion sleeve 2 7, which plays the role of connecting the current. Then the fixed gas box 2 is quickly fixed to the side wall of the ring network cabinet 1 by fasteners. After debugging, the power cable is hung on the copper busbar 1 5, and the power cable is connected to the temperature rise test device. At this time, the power cable is connected to the electrical equipment in the ring network cabinet 1 through the copper busbar, the conductive part, the side expansion sleeve 1 3, the busbar connector 6, and the side expansion sleeve 2 7. After power is turned on, the temperature rise test experiment of the ring main unit 1 can be carried out. After the experiment is completed, the power is turned off, and then the power cable and copper busbar 1 5 are removed first, and finally the fixed gas box 2 is removed. In this way, the entire process of the temperature rise test is completed.

[0038] The quick connection device is a connection mechanism designed for a separate box. The side expansion busbar connector 6 used in the standardized customization scheme of the 12KV ring main unit 1 is used at the connection with the complete set of ring main units 1 to be tested, and the connection is convenient and reliable. The copper busbar 5 is used to connect to the power supply side, and the connection is also convenient and reliable. The quick connection device is light in weight, easy to disassemble and move, greatly improving work efficiency and reducing costs.

[0039] In a further embodiment of the present scheme, the side wall of the fixed gas box 2 is further provided with an explosion-proof valve 8 and an air intake valve, both of which are analogous to a one-way valve. The air intake valve is used to fill the fixed gas box 2 with insulating gas without leaking from the air intake valve. The explosion-proof valve 8 is used to prevent the insulating gas in the fixed gas box 2 from being continuously heated during the test process, which causes the gas in the fixed gas box 2 to continue to increase and explode. Through the explosion-proof valve 8, the gas pressure in the fixed gas box 2 rises to a certain level, and then the gas is discharged to balance the gas pressure.

[0040] In a further embodiment of the present scheme, a cabinet reinforcing rib 12 is welded and fixed on the upper end face of the fixed air box 2, and an installation reinforcing rib is welded on the ring network cabinet 1. The cabinet reinforcing rib 12 and the installation reinforcing rib are made of 3.0 mm high-quality stainless steel mirror material. A plurality of through holes are provided on the cabinet reinforcing rib 12 and the installation reinforcing rib, and the through holes of the cabinet reinforcing rib 12 and the installation reinforcing rib are connected with fasteners, so that the fixed air box 2 can be quickly fastened and installed on the ring network cabinet 1.

[0041] In a further embodiment of the present scheme, the conductive member includes a cable post 9 embedded in the side expansion sleeve 3, a conductive post 10 embedded in the incoming line sleeve 4, and a copper bar 11. The cable post 9 and the conductive post 10 are respectively connected to both ends of the copper bar 11 via wires. The cable post 9 is embedded in the busbar connector 6 and connected to the cable post 2 in the side expansion sleeve 7. The cable post 9 is connected to the copper bar 5 via wires, the copper bar 11, the wires, and the conductive post 10, thereby forming a current transmission line in the fixed gas box 2.

[0042] In a further embodiment of this scheme, the side wall of the side expansion sleeve 3 and the end of the conductive column 10 extending into the fixed air box 2 are both screwed with a connector, the connector on the side expansion sleeve is connected to the cable column, and the two connector suspension ends are connected to wires, and the two wires are respectively connected to the two ends of the copper bar 2 11. Thus, the detachable connection between the copper bar 2 11 and the cable column 9 and the conductive column 10 is completed, which is convenient for equipment assembly and later maintenance and replacement. The copper bar 2 11 is covered with an insulating sleeve to prevent leakage.

[0043] In a further embodiment of the present invention, the spacing between two adjacent copper bars 5 is greater than 120 mm. 120 mm is the safe spacing between two adjacent copper bars 5 for preventing electrical leakage. The spacing between two copper bars 5 is greater than 120 mm, which can avoid the problem of interference between adjacent copper bars 5. Preferably, the spacing between the two copper bars is 150 mm, which satisfies the safe spacing and minimizes the volume of the fixed air box 2.

[0044] In a further embodiment of the present scheme, the insulating gas is sulfur hexafluoride gas. SF6 is a highly electronegative gas, and its molecules easily absorb free electrons to form negative ions with large mass, which weakens the collision ionization process in the gas. Therefore, its electrical insulation strength is very high, which is about 2.5 times the insulation strength of air in a uniform electric field, thereby preventing the copper busbar 11 in the fixed gas box 2 from leaking electricity and improving the safety of equipment operation.

[0045] In a further embodiment of this solution, the conductive column 10 is a copper rod, which has excellent electrical conductivity.

[0046] The above is only a preferred specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes within the technical scope disclosed in the present application according to the technical solution and application concept of the present application, which should be covered by the protection scope of the present application.

[0047] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0048] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A quick connection device for temperature rise test of a ring main unit, characterized in that: The invention comprises a fixed gas box (2) which is detachably mounted on a ring network cabinet (1) via fasteners, the fixed gas box (2) being filled with insulating gas, a plurality of side expansion sleeves (3) being arranged at intervals on a side wall of the fixed gas box (2) contacting the ring network cabinet (1), an incoming line sleeve (4) being arranged on the fixed gas box (2) and symmetrically distributed with and corresponding to the side expansion sleeves (3), a conductive member being inserted into both the side expansion sleeves (3) and the incoming line sleeves (4), an end of the conductive member extending out of the side expansion sleeves (3) being inserted with a busbar connector (6), and the other end being sleeved with a copper bar (5) located outside the incoming line sleeve (4).

2. A ring main unit temperature rise test quick connection device according to claim 1, characterized in that: The side wall of the fixed air box (2) is also provided with an explosion-proof valve (8) and an air intake valve.

3. A ring main unit temperature rise test quick connection device according to claim 1, characterized in that: A cabinet-joining reinforcement rib (12) is welded and fixed to the upper end surface of the fixed gas box (2), and an installation reinforcement rib is welded on the ring network cabinet (1), and the cabinet-joining reinforcement rib (12) is connected to the installation reinforcement rib via a fastener.

4. A ring main unit temperature rise test quick connection device according to claim 1, characterized in that: The conductive member comprises a cable post (9) embedded in a side expansion sleeve (3), a conductive post (10) embedded in an incoming line sleeve (4), and a copper busbar (11). The cable post (9) and the conductive post (10) are respectively connected to two ends of the copper busbar (11) via conductive wires.

5. A ring main unit temperature rise test quick connection device according to claim 4, characterized in that: The side wall of the side expansion sleeve 1 (3) and the end of the conductive column (10) extending into the fixed air box (2) are both threaded with a connector, the connector on the side expansion sleeve is connected to the cable column 1 (9), and the two connecting heads are connected to the suspended ends with wires, and the two wires are respectively connected to the two ends of the copper busbar 2 (11).

6. A ring main unit temperature rise test quick connection device according to claim 1, characterized in that: The distance between two adjacent copper bars (5) is greater than 120 mm.

7. A ring main unit temperature rise test quick connection device according to claim 2, characterized in that: The insulating gas is sulfur hexafluoride gas.

8. A ring main unit temperature rise test quick connection device according to claim 4, characterized in that: The conductive column (10) is a copper rod.

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