CN109742625B - A high-voltage flexible connection device for crude oil electric dehydration transformer and its installation method - Google Patents

Abstract

The invention belongs to the technical field of crude oil dehydration high-voltage power supply devices, in particular to a high-voltage flexible connection device for a crude oil electric dehydration transformer and an installation method thereof, which are provided for the problem that the existing connection device has insufficient hardness or over-strong hardness and poor flexibility of an external connection pipe, and mainly comprise the following steps: the high-voltage flexible connecting piece comprises a stainless steel thread braiding flexible connecting pipe and a high-voltage lead, wherein the stainless steel thread braiding flexible connecting pipe is sleeved on the high-voltage lead, supporting pieces and insulating sleeves are fully distributed in the stainless steel thread braiding flexible connecting pipe at intervals, the supporting pieces and the insulating sleeves are sleeved on the high-voltage lead, flanges are respectively arranged at two ends of the stainless steel thread braiding flexible connecting pipe, and the flanges are respectively connected with a transformer high-voltage wiring box and an electric dehydration tank high-voltage wiring device through insulating sealing structural parts. The invention ensures the external mechanical and compressive strength, homogenizes the internal electric field distribution and improves the insulation strength.

Description

A high-voltage flexible connection device for crude oil electric dehydration transformer and its installation method

Technical field:

The invention belongs to the technical field of high-voltage power supply devices for crude oil dehydration, and in particular relates to a high-voltage flexible connection device for a crude oil electric dehydration transformer and an installation method thereof.

Background technique:

With the development of crude oil in major oilfields in China, the water content of crude oil production fluid has increased significantly. In order to improve the recovery of crude oil, tertiary oil recovery technology has been widely used in major oilfields. The popularization of tertiary oil recovery technology increases crude oil production, and at the same time makes the composition of crude oil production fluid more complex, the viscosity increases, and the dehydration treatment becomes more difficult. Meet the needs of crude oil dehydration. Therefore, the crude oil electric dehydration technology is widely used in major oilfield dehydration sites due to its characteristics of stability, high efficiency, and strong oil quality adaptability.

However, with the increase in the use of electric dehydrators, short-circuit discharge accidents caused by the performance defects of the high-voltage lead wire device of the electric dehydration power supply are increasing. Crude oil electric dehydration technology is essentially a process of applying different forms of high voltage to the electrode plates inside the electric dehydration tank, and dehydrating the crude oil emulsion through the electric field between the plates. The specific implementation method is usually to place the electric dehydration transformer on the operating platform on the top of the horizontal dehydration tank, introduce the high voltage generated by the electric dehydration transformer into the explosion-proof wiring device of the dehydration tank through the high-voltage lead wire, and then send the high voltage into the dehydration tank on the inner electrode plate. The early electric dehydration transformer wiring device was exposed type, which directly exposed the high-voltage lead wire to the outside, and did not have explosion-proof function, posing a great safety hazard. With the advancement of technology, the wiring devices of electric dehydration transformers have adopted a fully sealed explosion-proof structure in the past ten years, but most of them are rigid connections, which are difficult to install and maintain; a few use flexible connection structures made of rubber products. There is a certain convenience in maintenance and maintenance, but there are big problems in explosion-proof strength and aging resistance. To sum up, there are certain technical difficulties in the design of high-voltage lead wires due to these two reasons: First, there is a certain distance between the electric dehydration transformer and the electric dehydration tank, and each dehydration transformer and dehydration tank are limited by the size of the on-site operation platform. The relative position between the explosion-proof wiring devices is not fixed, in order to facilitate the installation operation and subsequent maintenance, the high-voltage lead wire device needs to adopt a flexible connection method. Second, because the lead wire device needs to withstand high voltage inside and the shell of the transformer and dehydration tank explosion-proof wiring device needs to be reliably grounded, the connection device must have reliable insulation performance and meet the explosion-proof requirements of the oilfield site. There are two types of high-voltage lead wire devices for traditional crude oil dehydration transformers: one is a rigidly connected oil-filled structure, with steel pipes on the outside, insulated wires on the inside, and transformer oil in the middle. The main problem with this structure is that it needs to be checked before installation. And explosion-proof wiring device is accurately positioned, if the position changes during installation, it will be difficult to achieve assembly and sealing; in addition, due to the uneven distance between the inner wall of the steel pipe and the insulated wire, the internal electric field is unevenly distributed, so the insulation performance of the high-voltage wire is required. Higher , under long-term operation, insulation damage and discharge breakdown accidents are likely to occur; the other is a flexible connection oil-filled structure, the outside is a pressure-resistant rubber hose, the inside is an insulated wire, and the middle is filled with transformer oil. The location requirements are relatively low, but the strength of the external rubber hose is poor, and the rubber is prone to aging and deformation after long-term outdoor operation, resulting in transformer oil leakage and eventually leading to hidden dangers such as insulation failure.

Invention content:

In order to overcome the above-mentioned defects, the present invention provides a high-voltage flexible connection device for a crude oil electric dehydration transformer and its installation method. On the premise of ensuring reliable external machinery and withstand voltage strength, the device greatly improves its internal insulation structure , Homogenize the internal electric field distribution, improve the overall insulation strength, and at the same time improve the convenience of installation and maintenance of the device as a whole.

The technical solution adopted in the present invention is: a high-voltage flexible connection device for a crude oil electric dehydration transformer, including: a transformer high-voltage junction box and an electric dehydration tank high-voltage wiring device, and the overall horizontal height of the transformer high-voltage junction box is higher than the high-voltage electric dehydration tank The horizontal height of the wiring device also includes a high-voltage flexible connector, which connects the high-voltage junction box of the transformer with the high-voltage wiring device of the electric dehydration tank. When the transformer insulating oil is injected into the high-voltage junction box of the transformer, the transformer insulation The oil flows into the high-voltage wiring device of the electric dehydration tank through the high-voltage flexible connector; the high-voltage flexible connector includes a stainless steel thread braided flexible connecting pipe and a high-voltage lead wire, and the stainless steel thread braided flexible connecting pipe is sleeved on the high-voltage lead wire. The interior of the stainless steel thread braided flexible connecting pipe is covered with support sheets and insulating sleeves arranged at intervals. The supporting sheets and insulating sleeves are set on the high-voltage lead wires, and flanges are respectively provided at both ends of the stainless steel thread braided flexible connecting pipe. The blue and blue are respectively connected with the transformer high-voltage junction box and the electric dehydration tank high-voltage wiring device through the insulating and sealing structural parts, and the two ends of the high-voltage lead wire extend into the transformer high-voltage junction box and the electric dehydration tank high-voltage wiring device respectively.

Preferably, the stainless steel threaded braided flexible connecting pipe includes a stainless steel braided pipe and an inner lining insulating layer, and the inner lining insulating layer is provided on the inner wall of the stainless steel braided pipe.

Preferably, for the two flanges on the stainless steel thread braided flexible connecting pipe, one end connected to the high-voltage wiring device of the electric dehydration tank is a fixed flange, and one end connected to the transformer high-voltage junction box is a movable flange.

Preferably, the insulating sealing structure includes a sealing gasket and an insulating support, the sealing gasket is sleeved on the insulating support, and an oil guide groove is opened on the insulating support, the cross-sectional shape of the oil guide groove is cross-shaped, and the oil guide groove A high voltage lead cavity is formed at the center.

Preferably, the support sheet is a cross-shaped disc, which includes a high-voltage lead hole and a cross support leg located outside it, and the support sheet is made of polytetrafluoroethylene.

A method for installing a high-voltage flexible connection device for a crude oil electric dehydration transformer, the specific steps are as follows:

Step 1: Connect one end of the high-voltage lead wire to the high-voltage terminal in the high-voltage wiring device of the electric dehydration tank, and then pass the other end of the high-voltage lead wire out of the upper cover of the high-voltage wiring device of the electric dehydration tank, and cover the upper cover ; Then pass the high-voltage lead wire through the high-voltage lead wire cavity in the insulating and sealing structure, and then insert one end of the insulating and sealing structure into the upper cover mounting flange of the high-voltage wiring device of the electric dehydration tank;

Step 2: Put the stainless steel threaded braided flexible connecting pipe on the high-voltage lead, and alternately put the support sheet and the insulating sleeve on the high-voltage lead until the stainless steel threaded braided flexible connecting pipe is filled;

Step 3: Insert another insulating and sealing structural part into the mounting flange of the high-voltage junction box of the transformer, and then pass the high-voltage lead through the high-voltage lead cavity of the insulating and sealing structural part;

Step 4: First fasten the fixed flange and the installation flange of the high-voltage wiring device of the electric dehydration tank, then adjust the position of the stainless steel thread braided flexible connecting pipe, and then tighten the movable flange and the installation flange of the high-voltage junction box of the transformer solid;

Step 5: Connect the end of the high-voltage lead wire to the high-voltage output terminal in the high-voltage junction box of the transformer;

Step 6: Inject transformer insulating oil into the high-voltage junction box of the transformer until the high-voltage junction box of the transformer is filled.

Step 7: Tighten the sealing cover of the high-voltage junction box of the transformer to ensure the airtightness of the whole device.

Preferably, in the first step, the inside of the high-voltage wiring device of the electric dehydration tank needs to be cleaned first.

Preferably, in the step six, the specific injection process of the transformer insulating oil is to first inject the transformer insulating oil into the high-voltage junction box of the transformer, wait for the transformer insulating oil to fill the entire high-voltage wiring device of the electric dehydration tank, and observe it statically. After the insulating oil fully submerges the oil guide tank and no bubbles come out, refill the transformer insulating oil until the entire transformer high-voltage junction box is filled.

The beneficial effects of the present invention are:

1. The external connecting pipe is designed as a stainless steel threaded braided flexible connecting pipe. The outside of the connecting pipe is a stainless steel braided pipe with an insulating layer inside. This structure not only provides sufficient mechanical strength and compressive strength for external connections , while meeting the explosion-proof requirements, it also has a fundamental improvement in anti-aging performance, and can achieve a larger installation angle and installation distance adjustment, which is convenient for on-site installation and later maintenance.

2. Set insulating sleeves made of polytetrafluoroethylene and supporting sheets made of insulating materials on the high-voltage leads at intervals until they cover the entire device. This structure will not affect the insulation of the transformer in addition to its good insulation and supporting functions. Circulation, and the high-voltage lead wire can always be placed in the center of the stainless steel thread braided flexible connecting tube, which can effectively prevent the occurrence of breakdown discharge problems caused by uneven electric field distribution in the stainless steel threaded braided flexible connecting tube.

3. Set a movable flange at one end of the stainless steel thread braided flexible connecting pipe, and set a fixed flange at the other end. After fastening the fixed flange, according to the position of the stainless steel thread braided flexible connecting pipe and the size of the torsional stress, fasten the movable flange. The setting of flange and movable flange is beneficial to the fastening of the flange and the sealing of the interface. At the same time, an insulating sealing structure is installed at each flange interface, which protects and supports the high-voltage lead wire at the flange, and at the same time The oil guide groove designed on the insulating and sealing structural parts can also provide a passage for the transformer insulating oil, which is conducive to the rapid immersion of the transformer insulating oil in the entire structure and the discharge of residual gas.

Description of drawings:

Fig. 1 is the overall structure schematic diagram of the present invention;

Fig. 2 is a structural schematic diagram of a high-voltage flexible connector;

Fig. 3 is a structural schematic diagram of a stainless steel threaded braided flexible connecting pipe;

Fig. 4 is the enlarged view of place A in Fig. 1;

Fig. 5 is the structural representation of support sheet;

Figure 6 is a front view of the insulating and sealing structure;

Figure 7 is a side view of Figure 6;

Among them: 1 stainless steel thread braided flexible connecting pipe, 101 stainless steel braided pipe, 102 lining insulation layer, 2 high voltage lead wire, 3 transformer insulating oil, 4 support piece, 401 high voltage lead wire hole, 402 cross support foot, 5 insulating sleeve, 6 Insulation sealing structure, 601 sealing gasket, 602 insulating support, 603 oil guiding groove, 604 high voltage lead cavity, 701 fixed flange, 702 movable flange, 8 transformer high voltage junction box, 801 sealing cover, 9 high voltage wiring device of electric dehydration tank, 901 oil drain port.

Detailed ways:

As shown in Figure 1, the present invention is a high-voltage flexible connection device for a crude oil electric dehydration transformer, including: a high-voltage junction box 8 for a transformer, a high-voltage connection device 9 for an electric dehydration tank, and a high-voltage flexible connector, the high-voltage flexible connection The parts connect the transformer high-voltage junction box 8 with the high-voltage wiring device 9 of the electric dehydration tank. The overall horizontal height of the transformer high-voltage junction box 8 is higher than that of the high-voltage connection device 9 of the electric dehydration tank. When the oil is 3, the transformer insulating oil 3 flows through the high-voltage flexible connector into the high-voltage wiring device 9 of the electric dehydration tank, and the insulating strength and good heat dissipation performance of the device are guaranteed by filling the transformer insulating oil 3 in the entire connecting device.

As shown in Figure 2, the high-voltage flexible connector includes a stainless steel thread braided flexible connecting pipe 1 and a high-voltage lead wire 2. Flow between the flexible connecting pipe 1 and the high-voltage lead wire 2, flanges are respectively provided at both ends of the stainless steel thread braided flexible connecting pipe 1, and the flanges pass through the insulating and sealing structural member 6 and the high-voltage junction box 8 of the transformer and the electric dehydration tank respectively. The installation flange on the high-voltage wiring device 9 is connected, and the two ends of the high-voltage lead wire 2 extend into the transformer high-voltage junction box 8 and the electric dehydration tank high-voltage wiring device 9 respectively.

In order to ensure the electrical insulation strength of the device, the high-voltage lead wire 2 is made of high-voltage silicone rubber insulated wire with a core diameter of 2mm and an outer diameter of the insulation layer of 16mm. While improving its insulation strength, its flexibility is relatively high, which is convenient for installation and maintenance .

As shown in Figure 3, the stainless steel threaded braided flexible connecting pipe 1 comprises a stainless steel braided pipe 101 and a lining insulating layer 102. The lining insulating layer 102 is arranged on the inner wall of the stainless steel braiding pipe 101. With flange. The stainless steel braided pipe 101 provides sufficient mechanical strength and compressive strength for external connection, and can realize the adjustment of a large installation angle and installation distance, which is convenient for on-site installation and later maintenance. The inner lining insulation layer 102 is 2mm thick The advanced polytetrafluoroethylene lining insulation layer ensures the internal and external electrical isolation and at the same time homogenizes the internal electric field to a certain extent. The flanges at both ends of the stainless steel thread braided flexible connecting pipe 1 are fixed flanges 701 at the end connected with the high-voltage wiring device 9 of the electric dehydration tank, and the movable flange 702 is connected with the high-voltage junction box 8 of the transformer. The purpose of setting the movable flange 702 After fastening the fixed flange 701, the position of the movable flange 702 can be adjusted according to the position of the stainless steel thread braided flexible connecting pipe 1 and the size of the torsional stress, which is beneficial to the fastening of the movable flange 702 and the sealing of the interface.

As shown in Fig. 4 and Fig. 5, in order to keep the high-voltage lead wire 2 always on the axis position of the stainless steel threaded braided flexible connecting pipe 1, and to prevent the occurrence of the breakdown discharge problem caused by the uneven distribution of the electric field in the stainless steel threaded braided flexible connecting pipe 1, The inside of the stainless steel thread braided flexible connecting pipe 1 is covered with supporting pieces 4 and insulating sleeves 5 arranged at intervals, and the supporting pieces 4 and insulating sleeves 5 are set on the high-voltage lead wire 2, and the supporting piece 4 is made of polytetrafluoroethylene. , the longitudinal section of the support piece 4 is a cross-shaped disc, its inner diameter is 16mm, the outer diameter is 36mm, and the thickness is 5mm. When the high-voltage lead wire 2 passes through, the cross support foot 402 has good insulation and supporting functions, and will not affect the circulation of the transformer insulating oil 3; the insulating sleeve 5 is a cylinder with open ends made of polytetrafluoroethylene, and its The inner diameter is 16mm, the outer diameter is 20mm, and the length is 50mm. The cooperative use of the support piece 4 and the insulating sleeve 5 can realize the adjustment of a larger installation angle, that is, the installation distance.

As shown in Figure 6 and Figure 7, in order to improve the sealing and support of the flange joints between the connecting devices, between the installation flange of the transformer high-voltage junction box 8 and the movable flange 701 and the high-voltage wiring of the electric dehydration tank The interface between the installation flange of the device 9 and the fixed flange 702 is respectively plugged with an insulating sealing structure 6 with an oil guiding function. The insulating sealing structure 6 is made of polytetrafluoroethylene, which includes a sealing gasket 601 and the insulating support 602, the sealing gasket 601 is sleeved on the insulating support 602, the sealing gasket 601 separates the outer wall of the insulating support 602 into two parts with different lengths, and the left and right parts can be inserted into the corresponding flanges. An oil guiding groove 603 is provided on the insulating support 602. The longitudinal section of the oil guiding groove 603 is cross-shaped, and a high-voltage lead cavity 604 is formed in the center of the oil guiding groove 603 for the passage of the high-voltage lead wire 2. The outer side of the high-voltage lead wire 2 can be used for transformer insulation. The oil 3 provides a passage, which is conducive to the rapid immersion of the transformer insulating oil 3 to the entire device and the discharge of residual gas.

The protruding ends of the high-voltage lead wires 2 located in the high-voltage junction box 8 of the transformer and the high-voltage wiring device 9 of the electric dehydration tank are respectively welded with round terminals. Through the round terminals, the sharp ends and burrs of the high-voltage terminals can be avoided, and local electric fields can be generated. Concentrate, causing discharge.

A method for installing a high-voltage flexible connection device for a crude oil electric dehydration transformer, the specific steps are as follows:

Step 1: Open the upper cover of the high-voltage wiring device 9 of the electric dehydration tank, first clean up the inside of the high-voltage wiring device 9 of the electric dehydration tank, connect one end of the high-voltage lead wire 2 to the high-voltage terminal in the high-voltage wiring device 9 of the electric dehydration tank, and connect Pass the other end of the high-voltage lead wire 2 from the loam cake of the high-voltage wiring device 9 of the electric dehydration tank, and cover the loam cake; Then the high-voltage lead wire 2 passes through the high-voltage lead wire cavity 604 in the insulating sealing structure 6, and then Insert the long end of the insulating sealing structure 6 into the mounting flange on the upper cover of the high-voltage wiring device 9 of the electric dehydration tank;

Step 2: Put the stainless steel thread braided flexible connecting pipe 1 on the high voltage lead wire 2, and successively put multiple cross-shaped discs 4 and insulating sleeves 5 on the high voltage lead wire 2 in turn until the stainless steel thread braided flexible connecting pipe 1 until full;

Step 3: Insert the long end of another insulating and sealing structural member 6 into the mounting flange of the transformer high-voltage junction box 8, and then pass the high-voltage lead 2 through the high-voltage lead cavity 604 of the insulating and sealing structural member 6;

Step 4: First fix the fixed flange 701 with the installation flange of the high-voltage wiring device 9 of the electric dehydration tank through the installation bolts, and then adjust the movable flange 702 and the stainless steel threaded braided flexible connecting pipe 1 comprehensively considering factors such as radian, stress, and position Finally, fasten the movable flange 702 and the mounting flange of the transformer high-voltage junction box 8;

Step 5: Connect the other end of the high-voltage lead wire 2 to the high-voltage output terminal in the high-voltage junction box 8 of the transformer;

Step 6: Inject transformer insulating oil 3 into the transformer high-voltage junction box 8 until the transformer high-voltage junction box 8 is filled;

Step 7: Fasten the sealing cover 801 of the transformer high-voltage junction box 8 to ensure the sealing of the whole device.

Further, in step six, the specific injection process of the transformer insulating oil 3 is to first inject the transformer insulating oil 3 into the transformer high-voltage junction box 8, and after the transformer insulating oil 3 fills the entire high-voltage wiring device 9 of the electric dehydration tank, observe, After the transformer insulating oil 3 completely submerges the oil guiding groove 603 and no air bubbles emerge, refill the transformer insulating oil 3 until the entire transformer high-voltage junction box 8 is filled.

When overhauling and maintaining, first open the sealing cover 801 of the transformer high-voltage junction box 8, and then discharge the transformer insulating oil 3 through the oil discharge port 901 of the high-voltage wiring device 9 of the electric dehydration tank, and then disassemble and install in reverse according to the above process. Just replace it.

The above are only preferred specific implementations of the present invention. These specific implementations are all based on different implementations under the overall concept of the present invention, and the scope of protection of the present invention is not limited thereto. Anyone familiar with the technical field Within the technical scope disclosed in the present invention, any changes or substitutions that can be easily conceived by a skilled person shall fall within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims (6)

1. A high voltage flexible connection unit for crude oil electro-dewatering transformers, comprising: the high-voltage transformer comprises a high-voltage transformer box (8) and an electric dehydration tank high-voltage wiring device (9), wherein the overall horizontal height of the high-voltage transformer box (8) is higher than that of the high-voltage electric dehydration tank high-voltage wiring device (9), and the high-voltage transformer box is characterized by further comprising a high-voltage flexible connecting piece, the high-voltage flexible connecting piece connects the high-voltage transformer box (8) with the high-voltage electric dehydration tank high-voltage wiring device (9), and when transformer insulating oil (3) is injected into the high-voltage transformer box (8), the transformer insulating oil (3) flows through the high-voltage flexible connecting piece and enters the high-voltage electric dehydration tank high-voltage wiring device (9); the high-voltage flexible connecting piece comprises a stainless steel thread braiding flexible connecting pipe (1) and a high-voltage lead (2), the stainless steel thread braiding flexible connecting pipe (1) is sleeved on the high-voltage lead (2), supporting pieces (4) and insulating sleeves (5) which are arranged at intervals are fully distributed inside the stainless steel thread braiding flexible connecting pipe (1), the supporting pieces (4) and the insulating sleeves (5) are sleeved on the high-voltage lead (2), flanges are respectively arranged at two ends of the stainless steel thread braiding flexible connecting pipe (1), the flanges are respectively connected with a transformer high-voltage wiring box (8) and an electric dehydration tank high-voltage wiring device (9) through insulating sealing structural parts (6), and two ends of the high-voltage lead (2) respectively extend into the transformer high-voltage wiring box (8) and the electric dehydration tank high-voltage wiring device (9);

the stainless steel thread braiding flexible connecting pipe (1) comprises a stainless steel braiding pipe (101) and an inner lining insulating layer (102), wherein the inner lining insulating layer (102) is arranged on the inner wall of the stainless steel braiding pipe (101);

the insulating sealing structure (6) comprises a sealing gasket (601) and an insulating support (602), the sealing gasket (601) is sleeved on the insulating support (602), an oil guide groove (603) is formed in the insulating support (602), the cross section of the oil guide groove (603) is cross-shaped, and a high-voltage lead cavity (604) is formed in the center of the oil guide groove (603).

2. A high voltage flexible connection unit for crude oil electro-dewatering transformers as set forth in claim 1, wherein: two flanges on the flexible connecting pipe (1) are woven by stainless steel threads, one end connected with the high-voltage wiring device (9) of the electric dehydration tank is a fixed flange (701), and one end connected with the high-voltage wiring box (8) of the transformer is a movable flange (702).

3. A high voltage flexible connection unit for crude oil electro-dewatering transformers as set forth in claim 1, wherein: the supporting piece (4) is a cross-shaped wafer and comprises a high-voltage lead hole (401) and cross supporting feet (402) positioned on the outer side of the high-voltage lead hole, and the supporting piece is made of polytetrafluoroethylene.

4. A method of installing a high voltage flexible connection unit for crude oil electro-dewatering transformers as claimed in claim 2, comprising the steps of:

step one: connecting one end of a high-voltage lead (2) with a high-voltage terminal in a high-voltage wiring device (9) of the electric dehydration tank, penetrating the other end of the high-voltage lead (2) out of an upper cover of the high-voltage wiring device (9) of the electric dehydration tank after connecting, and covering the upper cover; then the high-voltage lead (2) passes through a high-voltage lead cavity (604) in the insulating sealing structural member (6), and then one end of the insulating sealing structural member (6) is inserted into an upper cover mounting flange of the high-voltage wiring device (9) of the electric dehydration tank;

step two: sleeving the stainless steel thread woven flexible connecting pipe (1) on the high-voltage lead (2), and sleeving the supporting sheet (4) and the insulating sleeve (5) on the high-voltage lead (2) alternately in sequence until the stainless steel thread woven flexible connecting pipe (1) is filled;

step three: inserting another insulating sealing structural member (6) into a mounting flange of a high-voltage junction box (8) of the transformer, and then penetrating a high-voltage lead (2) through a high-voltage lead cavity (604) of the insulating sealing structural member (6);

step four: fastening a fixed flange (701) and a mounting flange of a high-voltage wiring device (9) of an electric dehydration tank, adjusting the position of a stainless steel thread woven flexible connecting pipe (1), and fastening a movable flange (702) and a mounting flange of a high-voltage wiring box (8) of a transformer;

step five: connecting the end of the high-voltage lead (2) with a high-voltage output terminal in a high-voltage junction box (8) of the transformer;

step six: injecting transformer insulating oil (3) into the transformer high-voltage wiring box (8) until the transformer high-voltage wiring box (8) is full;

step seven: the sealing cover (801) of the high-voltage transformer wire box (8) is fastened, so that the tightness of the whole device is ensured.

5. The method of installing according to claim 4, wherein: in the first step, the inside of the high-voltage wiring device (9) of the electric dehydration tank is required to be cleaned.

6. The method of installing according to claim 4, wherein: in the sixth step, the specific injection process of the transformer insulating oil (3) is to inject the transformer insulating oil (3) into the transformer high-voltage junction box (8) first, observe after the transformer insulating oil (3) is full of the whole electric dehydration tank high-voltage junction device (9), and refill the transformer insulating oil (3) until the whole transformer high-voltage junction box (8) is full after the transformer insulating oil (3) completely submerges the oil guide groove (603) and no bubbles emerge.

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