Multi-plug type transformer wire outlet device

Abstract

The utility model relates to a multi-plug type transformer wire outlet device, which comprises a wire outlet ascending flanged base and a wire outlet cabin which are sequentially connected, the upper part of an oil-oil sleeve is arranged in the wire outlet ascending flanged base, each cable plug seat is arranged at the lower end of the wire outlet cabin, and a plurality of cables are led out from the upper end of the oil-oil sleeve and are respectively connected with the corresponding cable plug seats. A first cable support is arranged in the wire outlet ascending flanged base, a cable through hole is formed in the first cable support, all cables penetrate through the cable through hole, a second cable support is arranged in the wire outlet cabin, a guide block with a guide through hole is arranged on the second cable support, and the guide through hole is communicated with the guide block. And each cable passes through the guide through hole in the corresponding guide block and then is connected with the corresponding cable plugging seat. According to the utility model, a plurality of cable plugging seats can be arranged, and the requirements of independent maintenance operations such as deflation, independent oil injection and drainage, sampling oil drainage and the like of the transformer wire outlet device can be met.

Description

Technical Field

[0001] The utility model relates to the technical field of transformer assembly, and specifically relates to a multi-plug type transformer outgoing line device. Background Technique

[0002] To solve the problem of the occupied space of transformers, the plug-in type outgoing line device of transformers is more and more widely used. In the existing technology, the outgoing line of the winding of the transformer is first connected to the oil-filled bushing through a multi-core stranded copper wire, and then the bushing is connected to the cable plug socket through a lead wire and led out. And most of them are in the form of single plug. With the development of social economy and technology, the installed capacity of the power system is constantly increasing, and the market demand for large-capacity transformers is also increasing. At present, the plug socket outgoing line devices on the market can no longer meet the use requirements of large-capacity transformers.

[0003] The patent with the authorization announcement number CN214588318U discloses a plug-in type transformer outgoing line device. The lead wire of the transformer body of this device is connected to the connecting cable through the oil-filled bushing, and then the connecting cable is connected to the cable terminal, and the outside of the cable terminal is connected to the plug-in type cable.

[0004] The patent with the authorization announcement number CN201821072U discloses a socket bushing for transformers. This device includes a fixed insulating layer, and four independent cable terminal socket holes distributed at the "X"-shaped endpoints are arranged on the side of the fixed insulating layer facing the opening of the metal shell. The structure in the cable terminal socket hole matches the inner cone plug-in type cable terminal on the cable. However, this device realizes electrical connection through the conductor layer, and in order to ensure insulation, a fixed insulating layer also needs to be filled between the conductor layer and the metal shell. A high-voltage shielding ring is arranged on the conductor layer in the cable terminal socket hole, and an air-gap shielding ring is arranged in the plug to evenly distribute the electric field and improve the insulation level of the transformer. In addition, this device solves the problem that the number of external cables of the cable plug increases and the layout is beautiful. Its connecting plug with the transformer is still one. Although the current can reach 3150A, when it is used in situations such as the medium voltage end below 35kV and the high voltage end above 220kV, the allowable flowing current of a single cable plug is still very difficult to meet the outgoing line requirements of large-capacity transformers. Content of the Utility Model

[0005] The purpose of the utility model is to provide a multi-plug type transformer outgoing line device, which can set multiple cable plug sockets, meet the large-current outgoing line requirements not restricted by voltage levels, and can realize process operations such as separate oil injection, oil discharge, and sampling of the outgoing line device, which is convenient for the daily maintenance of the cable plug.

[0006] The purpose of the utility model is realized by the following technical solutions:

[0007] A multi-plug type transformer outgoing line device includes an oil-filled bushing, an outgoing line riser and an outgoing line cabin which are connected in sequence. The upper part of the oil-filled bushing is arranged in the outgoing line riser. Each cable plug socket is arranged at the lower end of the outgoing line cabin. And multiple cables are led out from the upper end of the oil-filled bushing and respectively connected to the corresponding cable plug sockets. A first cable support is arranged in the outgoing line riser. A cable through hole is arranged on the first cable support. And each cable passes through the cable through hole. A second cable support is arranged in the outgoing line cabin. A guiding block with a guiding through hole is arranged on the second cable support. And each cable passes through the guiding through hole on the corresponding guiding block and then is connected to the corresponding cable plug socket.

[0008] A gas release plug is arranged on the upper cover of the outgoing line cabin. An oil drain plug, an oil sample valve and an oil injection valve are arranged at the lower end of the cabin wall of the outgoing line cabin.

[0009] A wiring hand hole is arranged in the middle of the cabin wall of the outgoing line cabin. Multiple lifting lugs are arranged at the upper end of the cabin wall of the outgoing line cabin.

[0010] A pipe joint and an oil filter valve are arranged at the upper end of the outgoing line riser. A valve is arranged on the pipe joint. And the pipe joint is connected to the transformer oil tank through a pipeline.

[0011] The first cable support includes a cable support seat and a limiting retaining ring. A connecting cylinder is arranged on one side of the outgoing line riser to connect with the outgoing line cabin. The lower end of the cable support seat is fixed on the inner wall of the connecting cylinder. The limiting retaining ring is fixed on the cable support seat. The cable through hole is formed inside the limiting retaining ring.

[0012] The limiting retaining ring is fixed on the cable support seat through a retaining ring bolt.

[0013] The lower end of the cable support seat is fixed on the inner wall of the connecting cylinder through a bolt-nut assembly. The nut in the bolt-nut assembly is arranged outside the connecting cylinder. The bolt in the bolt-nut assembly passes through the lower end of the cable support seat and the cylinder wall of the connecting cylinder and then is threadedly connected to the nut.

[0014] The second cable support includes side rods on both sides and a support cross bar arranged between the two side rods. Fixed blocks are arranged at the rear ends of the side rods and fixed on the inner wall of the outgoing line cabin. The guiding block is arranged on the support cross bar.

[0015] Both ends of the support cross bar are respectively fixed on the corresponding side rods through cross bar bolts. The guiding block is movably and adjustably arranged on the support cross bar.

[0016] The advantages and positive effects of the present utility model are:

[0017] 1. The utility model is provided with a plurality of cable plug - in sockets. Considering that the outgoing lead for large - current is relatively thick and heavy, the utility model first uses the first cable support in the outgoing line elevation seat to gather and support multiple cables, and then uses each second cable support in the outgoing line cabin to support each cable respectively and turn it to be connected to the corresponding cable plug - in socket, so as to ensure that the cables are fully separated from each other and will not affect each other.

[0018] 2. Since the utility model uses an oil - filled bushing to cooperate with each cable plug - in socket for connection, this can isolate the transformer oil tank from the outgoing line cabin with cable plug - in sockets. Therefore, structures such as a gas release plug, an oil drain plug, an oil sample valve, an oil injection valve, etc. can be set on the outgoing line elevation seat or the outgoing line cabin of the utility model, so as to realize functions such as oil injection and drainage, and oil sample extraction, and meet the function of independent maintenance.

[0019] 3. The first cable support of the utility model uses a limit retaining ring to gather each cable, and the limit retaining ring can be replaced according to actual needs. The utility model can also set an appropriate number of second cable supports on the inner wall of the outgoing line cabin to meet the connection requirements of different numbers of cable plug - in sockets. And an appropriate number of support cross - bars can be set on the second cable support according to actual needs, and movable and adjustable guide blocks can be set on the support cross - bars according to actual needs. All these can enable the utility model to set more cable plug - in sockets according to actual needs. Brief Description of the Drawings

[0020] Figure 1 is the structural schematic diagram of the utility model,

[0021] Figure 2 is Figure 1 the top view of the utility model in

[0022] Figure 3 is Figure 2 the H - direction view in

[0023] Figure 4 is Figure 1 the internal structural schematic diagram of the outgoing line elevation seat and the outgoing line cabin in

[0024] Figure 5 is Figure 4 the K - direction view in

[0025] Figure 6 is Figure 4 the A - A view in

[0026] Among them, 1 is the transformer oil tank, 2 is the bushing riser, 3 is the outgoing line riser, 301 is the pipe joint, 302 is the oil filter valve, 4 is the oil-filled bushing, 5 is the cable plug and socket, 6 is the outgoing line compartment, 601 is the connecting flange, 602 is the upper cover, 603 is the bulkhead, 604 is the bottom plate, 605 is the air vent plug, 606 is the oil drain plug, 607 is the oil sample valve, 608 is the oil injection valve, 609 is the wiring manhole, 610 is the stiffening rib, 611 is the lifting lug, 7 is the first cable support, 701 is the bolt and nut assembly, 702 is the cable support seat, 703 is the limit retaining ring, 704 is the cable through hole, 705 is the retaining ring bolt, 8 is the second cable support, 801 is the fixing block, 802 is the support cross bar, 803 is the guiding block, and 9 is the outgoing line compartment support. Detailed implementation mode

[0027] The present utility model will be further described in detail below with reference to the accompanying drawings.

[0028] As Figures 1-6 shown, the present utility model includes an oil-filled bushing 4 and an outgoing line riser 3 and an outgoing line compartment 6 connected in sequence. Among them, as Figure 4 shown, the upper part of the oil-filled bushing 4 is arranged in the outgoing line riser 3, each cable plug and socket 5 is arranged at the lower end of the outgoing line compartment 6, and multiple cables are led out from the upper end of the oil-filled bushing 4 and respectively connected to the corresponding cable plug and socket 5. A first cable support 7 is arranged in the outgoing line riser 3, and a cable through hole 704 is arranged on the first cable support 7. And as Figure 5 shown, each cable passes through the cable through hole 704. A second cable support 8 is arranged in the outgoing line compartment 6, and a guiding block 803 with a guiding through hole is arranged on the second cable support 8. And as Figure 6 shown, each cable passes through the guiding through hole on the corresponding guiding block 803 and then is connected to the corresponding cable plug and socket 5.

[0029] As Figures 2-3 shown, in this embodiment, an air vent plug 605 is arranged on the upper cover 602 of the outgoing line compartment 6 to prevent air accumulation at this place from affecting the partial discharge test. An oil drain plug 606, an oil sample valve 607 and an oil injection valve 608 are arranged at the lower end of the bulkhead 603 of the outgoing line compartment 6 for process treatment and oil sample monitoring during operation. And each cable plug and socket 5 is fixed on the bottom plate 604 of the outgoing line compartment 6. The air vent plug 605, the oil drain plug 606, the oil sample valve 607 and the oil injection valve 608 are all commercially available products. However, since the present utility model uses the oil-filled bushing 4 to connect with each cable plug and socket 5, separating the transformer oil tank 1 from the outgoing line compartment 6 with the cable plug and socket 5, the present utility model can perform operations such as air venting, separate oil injection and draining, and sampling and draining on the outgoing line riser 3 or the outgoing line compartment 6.

[0030] As Figure 3As shown, in this embodiment, a wiring access hole 609 is provided in the middle of the bulkhead 603 of the outgoing line compartment 6. After the wiring access hole 609 is opened by an operator, wiring operations inside the compartment can be carried out. In addition, a plurality of lifting lugs 611 are provided along the circumferential direction at the upper end of the bulkhead 603 of the outgoing line compartment 6 to facilitate the hoisting and installation of the present utility model.

[0031] As Figure 1 shown, in this embodiment, a pipe joint 301 and an oil filter valve 302 are provided at the upper end of the outgoing line elevation seat 3. A valve is provided on the pipe joint 301, and the pipe joint 301 is used to connect to the transformer oil tank 1. During the operation of the equipment, the valve on the pipe joint 301 is in an open state. The oil filter valve 302 is used for separate oil injection and drainage of the outgoing line elevation seat 3. Both the pipe joint 301 and the oil filter valve 302 are commercially available products.

[0032] As Figure 1 shown, in this embodiment, the lower end of the outgoing line elevation seat 3 is installed in the bushing elevation seat 2, and the lower part of the oil bushing 4 is arranged in the bushing elevation seat 2. The lower end of the bushing elevation seat 2 is installed on the transformer oil tank 1.

[0033] As Figure 5 shown, in this embodiment, the first cable support 7 includes a cable support seat 702 and a limit retaining ring 703. As Figure 4 shown, a circular connecting cylinder is provided on one side of the outgoing line elevation seat 3 and is connected to the outgoing line compartment 6. The lower end of the cable support seat 702 is fixed to the inner wall of the connecting cylinder, and the limit retaining ring 703 is fixed to the cable support seat 702. And as Figure 5 shown, a cable through hole 704 is formed inside the limit retaining ring 703. Since the outgoing lead for large current is relatively thick and heavy, the present utility model uses the first cable support 7 to gather and support multiple cables. While ensuring the support and fixation of the cables, it can also reduce the channel size of the horizontal connecting cylinder on one side of the outgoing line elevation seat 3. In addition, the present utility model can also select a limit retaining ring 703 with a suitable shape according to actual needs to meet the requirements for limiting and fixing cables of different specifications and quantities. The limit retaining ring 703 is fixed to the cable support seat 702 by retaining ring bolts 705 for easy disassembly and replacement. And during installation, the operator can also first place each cable into the limit retaining ring 703 to observe whether it is suitable, and then fix the limit retaining ring 703 to the cable support seat 702 by retaining ring bolts 705.

[0034] As Figure 5As shown, in this embodiment, the lower end of the cable support seat 702 is fixed to the inner wall of the connecting tube by a bolt and nut assembly 701, wherein the nut in the bolt and nut assembly 701 is arranged on the outside of the connecting tube, and the bolt in the bolt and nut assembly 701 passes through the lower end of the cable support seat 702 and the wall of the connecting tube and is threadedly connected with the nut. The above-mentioned bolt and nut assembly 701 facilitates the utility model to replace the cable support seat 702 according to the actual cable specifications, thereby ensuring the supporting strength of each cable after being retracted.

[0035] like Figure 6 As shown, in this embodiment, the second cable bracket 8 includes side rods on both sides and a supporting cross bar 802 arranged between the two side rods, wherein the rear end of the side rod is provided with a fixing block 801 fixed to the inner wall of the outlet compartment 6, and the supporting cross bar 802 is provided with the guide block 803.

[0036] like Figure 6 As shown, the utility model can arrange a suitable number of second cable supports 8 on the inner wall of the outlet compartment 6 to meet the connection needs of different numbers of cable plug-in sockets 5. For example, the second cable supports 8 located on the same side of the outlet compartment 6 can be arranged along the up and down direction, and the side rod lengths of the upper and lower second cable supports 8 can be different to ensure that the cables are fully separated, and the two ends of the support cross bar 802 are respectively fixed to the corresponding side rods by cross bar bolts. In this way, the utility model can arrange a suitable number of support cross bars 802 on the second cable support 8, such as arranging two support cross bars 802 between the two side rods of a single second cable support 8 with sufficient spacing, and each support cross bar 802 independently supports a cable to achieve turning. In addition, the guide block 803 can also be movably and adjustably arranged on the support cross bar 802. For example, a sliding sleeve with a fastening bolt is provided on the upper side of the guide block 803 and is mounted on the support cross bar 802. After loosening the fastening bolt, the sliding sleeve can be moved along the support cross bar 802 to adjust the position. When the position of the sliding sleeve is determined, the fastening bolt is tightened again to press against the support cross bar 802 to lock the position of the sliding sleeve. In this way, the utility model can stagger the guide blocks 803 on two adjacent support cross bars 802 according to actual needs. The above structures can ensure that the cables are fully separated and will not affect each other, so that the utility model can set more cable plug-in sockets 5 according to actual needs.

[0037] like Figure 2 As shown, the utility model can select a suitable connection method according to actual needs to realize the connection between the outlet compartment 6 and the outlet elevation seat 3. In this embodiment, a connection flange 601 is provided on one side of the outlet compartment 6 to be connected with the connection tube flange on one side of the outlet elevation seat 3. The connection tube can also be directly welded to the outlet compartment 6. In addition, in order to ensure the support strength of the outlet compartment 6, as shown in FIG.Figure 3 As shown, reinforcing ribs 610 may be provided at appropriate positions on the outgoing line compartment 6.

[0038] The working principle of the present utility model is as follows:

[0039] In the present utility model, the oil-oil bushing 4 is arranged in the bushing lifting seat 2 and the outgoing line lifting seat 3, the cable plugging and unplugging seat 5 is arranged in the outgoing line compartment 6, and multiple cables are led out from the upper end of the oil-oil bushing 4 and are respectively connected to the corresponding cable plugging and unplugging seats 5 to meet the use requirements of the equipment. Considering that the outgoing lead for large current is relatively thick and heavy, the present utility model first uses the first cable support 7 in the outgoing line lifting seat 3 to gather and support the multiple cables. While ensuring the support and fixation of the cables, the channel diameter size of the horizontal connecting cylinder on one side of the outgoing line lifting seat 3 can also be reduced. Secondly, the present utility model uses each second cable support 8 in the outgoing line compartment 6 to support each cable respectively and makes the cable turn to realize the connection with the corresponding cable plugging and unplugging seat 5. The appropriate number of second cable supports 8 can be set on the inner wall of the outgoing line compartment 6 according to actual needs. The appropriate number of support crossbars 802 can be set on the second cable support 8, and movable and adjustable guide blocks 803 can be set on the support crossbars 802. In this way, the present utility model can set more cable plugging and unplugging seats 5 according to actual needs to meet the use requirements, and at the same time, the cables are fully separated from each other and will not affect each other. Thirdly, since the present utility model uses the oil-oil bushing 4 to connect with each cable plugging and unplugging seat 5, the transformer tank 1 is separated from the outgoing line compartment 6 with the cable plugging and unplugging seat 5. Therefore, the present utility model can perform operations such as gas release, separate oil injection and drainage, and sampling and drainage on the outgoing line lifting seat 3 or the outgoing line compartment 6 without affecting the transformer body.

Claims

1. A multi-plug type transformer outgoing line device, characterized in that: It includes an oil-filled bushing (4), a lead-out riser (3) and a lead-out compartment (6) connected in sequence. The upper part of the oil-filled bushing (4) is arranged in the lead-out riser (3). Each cable plug-in socket (5) is arranged at the lower end of the lead-out compartment (6). And multiple cables are led out from the upper end of the oil-filled bushing (4) and respectively connected to the corresponding cable plug-in sockets (5). A first cable support (7) is arranged in the lead-out riser (3). A cable through-hole (704) is arranged on the first cable support (7). And each cable passes through the cable through-hole (704). A second cable support (8) is arranged in the lead-out compartment (6). A guide block (803) with a guide through-hole is arranged on the second cable support (8). And each cable passes through the guide through-hole on the corresponding guide block (803) and then is connected to the corresponding cable plug-in socket (5).

2. The multi-plug type transformer outgoing line device according to claim 1, wherein: A gas release plug (605) is arranged on the upper cover (602) of the lead-out compartment (6). A drain plug (606), an oil sample valve (607) and an oil injection valve (608) are arranged at the lower end of the cabin wall (603) of the lead-out compartment (6).

3. The multi-plug head type transformer outgoing line device according to claim 2, characterized in that: A wiring manhole (609) is arranged in the middle of the cabin wall (603) of the lead-out compartment (6). Multiple lifting lugs (611) are arranged at the upper end of the cabin wall (603) of the lead-out compartment (6).

4. The multi-plug head type transformer outgoing line device according to claim 1, wherein: A pipe joint (301) and an oil filter valve (302) are arranged at the upper end of the lead-out riser (3). A valve is arranged on the pipe joint (301). And the pipe joint (301) is connected to the transformer oil tank (1) through a pipeline.

5. The multi-plug type transformer outgoing line device according to claim 1, characterized in that: The first cable support (7) includes a cable support base (702) and a limit retaining ring (703). A connecting cylinder is arranged on one side of the lead-out riser (3) to connect with the lead-out compartment (6). The lower end of the cable support base (702) is fixed on the inner wall of the connecting cylinder. The limit retaining ring (703) is fixed on the cable support base (702). The cable through-hole (704) is formed inside the limit retaining ring (703).

6. The multi-plug head type transformer outgoing line device according to claim 5, characterized in that: The limit retaining ring (703) is fixed on the cable support base (702) through a retaining ring bolt (705).

7. The multi-plug transformer outgoing line device according to claim 5, characterized in that: The lower end of the cable support base (702) is fixed on the inner wall of the connecting cylinder through a bolt and nut assembly (701). The nut in the bolt and nut assembly (701) is arranged outside the connecting cylinder. The bolt in the bolt and nut assembly (701) passes through the lower end of the cable support base (702) and the wall of the connecting cylinder and then is threadedly connected to the nut.

8. The multi-plug type transformer outgoing line device according to claim 1, characterized in that: The second cable support (8) includes side rods on both sides and a support cross-bar (802) arranged between the two side rods. Fixed blocks (801) are arranged at the rear ends of the side rods and fixed on the inner wall of the lead-out compartment (6). The guide block (803) is arranged on the support cross-bar (802).

9. The multi-plug type transformer outgoing line device according to claim 8, characterized in that: Both ends of the support cross-bar (802) are respectively fixed on the corresponding side rods through cross-bar bolts. The guide block (803) is movably and adjustably arranged on the support cross-bar (802).

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