CN109742625B - High-voltage flexible connection device for crude oil electric dehydration transformer and installation method thereof - Google Patents
High-voltage flexible connection device for crude oil electric dehydration transformer and installation method thereof Download PDFInfo
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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
Technical field:
the invention belongs to the technical field of crude oil dehydration high-voltage power supply devices, and particularly relates to a high-voltage flexible connection device for a crude oil electric dehydration transformer and an installation method thereof.
The background technology is as follows:
along with the crude oil extraction of various large oil fields in China entering the middle and later stages, the water content of crude oil extraction liquid is obviously improved, and in order to improve the crude oil recovery efficiency, the tertiary oil recovery technology is widely applied to various large oil fields. The popularization of tertiary oil recovery technology improves the yield of crude oil, simultaneously makes the components of the crude oil produced liquid more complex, increases the viscosity and makes the dehydration treatment more difficult, and the requirements of crude oil dehydration cannot be met by only adding demulsifiers, natural sedimentation and other traditional methods into the crude oil produced liquid. Therefore, the crude oil electric dehydration technology is widely applied to dehydration sites of various large oil fields because of the characteristics of stability, high efficiency, strong oil quality adaptability and the like.
However, with the increase of the dosage of the electric dehydrator, short-circuit discharge accidents caused by the performance defect of the high-voltage lead device of the electric dehydration power supply are increasingly increased. The crude oil electric dehydration technology is essentially a process of applying high voltages in different forms to electrode plates in an electric dehydration tank and dehydrating crude oil emulsion by the action of an electric field between the electrode plates. The specific implementation mode is that an electric dehydration transformer is placed on an operation platform at the top of a horizontal dehydration tank, and high voltage generated by the electric dehydration transformer is introduced into an explosion-proof wiring device of the dehydration tank through a high-voltage lead, so that the high voltage is sent to an electrode plate in the dehydration tank. The early-stage electric dehydration transformer wiring device is exposed, so that a high-voltage lead is directly exposed outside and has no explosion-proof function, and a great potential safety hazard exists. With the progress of technology, the wiring device of the electric dewatering transformer has been in a fully-sealed explosion-proof structure in more than ten years, but most of the wiring devices are in rigid connection, so that the difficulty in installation and maintenance is high; a small part of the flexible connection structures adopt rubber products, and although the flexible connection structures have certain convenience in installation and maintenance, the flexible connection structures have great problems in explosion-proof strength and ageing resistance. In summary, there is a certain technical difficulty in designing the high-voltage lead wire due to the two reasons: firstly, because there is certain distance between electric dehydration transformer and the electric dehydration tank body, and the relative position between each dehydration transformer and the explosion-proof wiring device of dehydration tank is not fixed by on-the-spot operation platform size restriction, in order to be convenient for installation operation and later maintenance, high voltage lead wire device needs to adopt flexible connection mode. Secondly, because the inside of the lead device needs to bear high voltage and the outer shell of the explosion-proof wiring device of the transformer and the dehydration tank needs to be reliably grounded, the connecting device must have reliable insulating property and meet the explosion-proof requirement of the oilfield site. The high-voltage lead device for the traditional crude oil dehydration transformer is divided into two types: the structure has the main problems that the dewatering transformer and the explosion-proof wiring device need to be accurately positioned before installation, and if the position changes during installation, the assembly and the sealing are difficult to realize; in addition, the inner wall of the steel pipe and the insulated wire are not uniform in distance, so that the internal electric field is unevenly distributed, the requirement on the insulation performance of the high-voltage wire is high, insulation damage is easy to occur under long-term operation, and discharge breakdown accidents occur; the other is flexible connection oil-filled structure, the outside is pressure-resistant rubber hose, the inside is insulated wire, the middle is filled with transformer oil, the structure has lower requirements on the position of equipment during installation, but the strength of the outer rubber hose is poor, rubber ageing and deformation are easy to occur after long-term outdoor operation, transformer oil leakage is caused, and finally potential hazards such as insulation failure are caused.
The invention comprises the following steps:
the invention aims to overcome the defects, and provides the high-voltage flexible connecting device for the crude oil electric dehydration transformer and the mounting method thereof.
The invention adopts the technical scheme that: a high voltage flexible connection unit for crude oil electro-dewatering transformers, comprising: the high-voltage flexible connecting piece is used for connecting the high-voltage transformer wire box with the high-voltage electric dehydration tank, and when transformer insulating oil is injected into the high-voltage transformer wire box, the transformer insulating oil flows through the high-voltage flexible connecting piece and enters the high-voltage electric dehydration tank; the high-voltage flexible connecting piece comprises a stainless steel thread braiding flexible connecting pipe and a high-voltage lead, the stainless steel thread braiding flexible connecting pipe is sleeved on the high-voltage lead, supporting pieces and insulating sleeves are arranged inside 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, 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 members, and two ends of the high-voltage lead respectively extend into the transformer high-voltage wiring box and the electric dehydration tank high-voltage wiring device.
Preferably, the stainless steel thread braiding flexible connecting pipe comprises a stainless steel braiding pipe and an inner lining insulating layer, wherein the inner lining insulating layer is arranged on the inner wall of the stainless steel braiding pipe.
Preferably, the two flanges on the flexible connecting pipe are woven by stainless steel threads, one end connected with the high-voltage wiring device of the electric dehydration tank is a fixed flange, and the other end connected with the high-voltage wiring box of the transformer is a movable flange.
Preferably, the insulating sealing structural member comprises a sealing gasket and an insulating support, the sealing gasket is sleeved on the insulating support, an oil guiding groove is formed in the insulating support, the cross section of the oil guiding groove is cross-shaped, and a high-voltage lead cavity is formed in the center of the oil guiding groove.
Preferably, the supporting sheet is a cross-shaped wafer, and comprises a high-voltage lead hole and cross supporting feet positioned on the outer side of the high-voltage lead hole, and the supporting sheet is made of polytetrafluoroethylene.
The installation method of the high-voltage flexible connection device for the crude oil electric dehydration transformer comprises the following specific steps:
step one: connecting one end of a high-voltage lead with a high-voltage terminal in the high-voltage wiring device of the electric dehydration tank, penetrating the other end of the high-voltage lead out of an upper cover of the high-voltage wiring device of the electric dehydration tank after connecting, and covering the upper cover; then the high-voltage lead wire passes through a high-voltage lead wire cavity in the insulating sealing structural member, and then one end of the insulating sealing structural member is inserted into an upper cover mounting flange of the high-voltage wiring device of the electric dehydration tank;
step two: sleeving the stainless steel thread woven flexible connecting pipe on the high-voltage lead, and sleeving the supporting sheet and the insulating sleeve on the high-voltage lead alternately in sequence until the stainless steel thread woven flexible connecting pipe is filled;
step three: inserting another insulating sealing structural member into a mounting flange of a high-voltage junction box of the transformer, and then penetrating a high-voltage lead wire through a high-voltage lead wire cavity of the insulating sealing structural member;
step four: fastening a fixed flange and a mounting flange of a high-voltage wiring device of the electric dehydration tank, adjusting the position of a stainless steel thread woven flexible connecting pipe, and fastening a movable flange and a mounting flange of a high-voltage wiring box of the transformer;
step five: connecting the end of the high-voltage lead with a high-voltage output terminal in a high-voltage junction box of the transformer;
step six: and injecting transformer insulating oil into the high-voltage junction box of the transformer until the high-voltage junction box of the transformer is full.
Step seven: and the sealing cover of the high-voltage junction box of the transformer is fastened, so that the tightness of the whole device is ensured.
Preferably, in the first step, the inside of the high-voltage wiring device of the electric dehydration tank needs to be cleaned.
Preferably, in the sixth step, the specific injection process of the transformer insulating oil is to inject the transformer insulating oil into the high-voltage junction box of the transformer first, after the transformer insulating oil fills the high-voltage junction device of the whole electric dehydration tank, the transformer insulating oil is observed at rest, after the transformer insulating oil completely submerges the oil guiding groove, no bubbles emerge, and then the transformer insulating oil is refilled until the whole high-voltage junction box of the transformer is filled.
The beneficial effects of the invention are as follows:
1. the external connecting pipe is designed into the stainless steel thread woven flexible connecting pipe, the stainless steel woven pipe is arranged outside the connecting pipe, and the lining insulating layer is arranged inside the connecting pipe.
2. The high-voltage lead is sleeved with the polytetrafluoroethylene insulating sleeve and the insulating supporting sheet at intervals until the whole device is fully covered, the structure not only has good insulation and supporting effects, but also can not influence the circulation of transformer insulating oil, and the high-voltage lead can be always arranged at the center of the stainless steel thread woven flexible connecting pipe, so that the breakdown discharge problem caused by uneven electric field distribution in the stainless steel thread woven flexible connecting pipe can be effectively prevented.
3. The flexible connecting pipe is characterized in that one end of the flexible connecting pipe is provided with the movable flange, the other end of the flexible connecting pipe is provided with the fixed flange, after the fixed flange is fastened, the movable flange is fastened according to the position of the flexible connecting pipe woven by the stainless steel threads and the size of torsional stress, the movable flange is provided with the sealing of the fastening and the interface of the flange, meanwhile, an insulating sealing structural member is installed at the interface of each flange, the insulating sealing structural member plays a role in protecting and supporting a high-voltage lead wire at the flange, and meanwhile, an oil guide groove is designed on the insulating sealing structural member, a passage can be provided for transformer insulating oil, and the quick immersion of the whole structure of the transformer insulating oil and the discharge of residual gas are facilitated.
Description of the drawings:
FIG. 1 is a schematic diagram of the overall structure of the present invention;
FIG. 2 is a schematic view of a high voltage flexible connection unit;
FIG. 3 is a schematic view of a stainless steel threaded braided flexible connecting tube;
FIG. 4 is an enlarged view of FIG. 1 at A;
FIG. 5 is a schematic view of the structure of the support sheet;
FIG. 6 is a front view of an insulating sealing structure;
FIG. 7 is a side view of FIG. 6;
wherein: 1 stainless steel thread braiding flexible connecting pipe, 101 stainless steel braiding pipe, 102 lining insulating layer, 2 high-voltage lead, 3 transformer insulating oil, 4 supporting sheets, 401 high-voltage lead hole, 402 cross supporting leg, 5 insulating sleeve, 6 insulating sealing structural member, 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 electric dehydration tank high-voltage wiring device, 901 oil drain port.
The specific embodiment is as follows:
as shown in fig. 1, the present invention is a high-voltage flexible connection unit for crude oil electro-dewatering transformers, comprising: the transformer high-voltage wiring box 8, the electric dehydration tank high-voltage wiring device 9 and the high-voltage flexible connecting piece, the high-voltage flexible connecting piece links to each other transformer high-voltage wiring box 8 and electric dehydration tank high-voltage wiring device 9, and the whole level of transformer high-voltage wiring box 8 is higher than the level of electric dehydration tank high-voltage wiring device 9, when the injection transformer insulating oil 3 in to transformer high-voltage wiring box 8, transformer insulating oil 3 flows through the high-voltage flexible connecting piece and gets into in the electric dehydration tank high-voltage wiring device 9, guarantees the insulating strength and the good heat dispersion of device through filling transformer insulating oil 3 in whole connecting device.
As shown in fig. 2, 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, transformer insulating oil 3 flows between the stainless steel thread braiding flexible connecting pipe 1 and 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 mounting flanges on a transformer high-voltage junction box 8 and an electric dehydration tank high-voltage wiring device 9 through insulating sealing structural members 6, and two ends of the high-voltage lead 2 respectively extend into the transformer high-voltage junction box 8 and the electric dehydration tank high-voltage wiring device 9.
In order to ensure the electrical insulation strength of the device, the high-voltage lead 2 is a high-voltage silicon rubber insulated wire, the wire core diameter is 2mm, the outer diameter of the insulating layer is 16mm, the insulation strength is improved, and meanwhile, the softness is high, so that the device is convenient to install and maintain.
As shown in fig. 3, the stainless steel thread woven flexible connection pipe 1 comprises a stainless steel woven 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 woven pipe 101, and flanges are respectively arranged at two ends of the stainless steel woven pipe 101. The stainless steel braided tube 101 provides sufficient mechanical strength and compressive strength when externally connected, can realize adjustment of a larger installation angle and installation distance, is convenient for field installation and later maintenance, and the lining insulating layer 102 is a polytetrafluoroethylene lining insulating layer with the thickness of 2mm, ensures electrical isolation between the inside and the outside, and homogenizes an internal electric field to a certain extent. The flanges at two ends of 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, one end connected with the high-voltage wiring box 8 of the transformer is a movable flange 702, and the purpose of the movable flange 702 is to adjust the position of the movable flange 702 according to the position of the flexible connecting pipe 1 woven by the stainless steel threads and the size of torsion stress after the fixed flange 701 is fastened, so that the fastening of the movable flange 702 and the sealing of an interface are facilitated.
As shown in fig. 4 and fig. 5, in order to make the high-voltage lead 2 always placed at the axial position of the stainless steel thread braiding flexible connecting pipe 1, to prevent the breakdown discharge problem caused by uneven electric field distribution in the stainless steel thread braiding flexible connecting pipe 1, a supporting sheet 4 and an insulating sleeve 5 are fully distributed in the stainless steel thread braiding flexible connecting pipe 1 and are arranged at intervals, the supporting sheet 4 and the insulating sleeve 5 are sleeved on the high-voltage lead 2, the supporting sheet 4 is made of polytetrafluoroethylene, the longitudinal section of the supporting sheet 4 is a cross-shaped wafer, the inner diameter is 16mm, the outer diameter is 36mm, the thickness is 5mm, the supporting sheet 4 comprises a high-voltage lead hole 401 and a cross supporting leg 402 positioned at the outer side of the high-voltage lead hole 401, the high-voltage lead 2 passes through, the cross supporting leg 402 has good insulation and supporting functions, and the circulation of transformer insulating oil 3 is not affected; the insulating sleeve 5 is a cylinder body made of polytetrafluoroethylene and provided with openings at two ends, and the inner diameter is 16mm, the outer diameter is 20mm and the length is 50mm. The supporting sheet 4 and the insulating sleeve 5 can be matched for use to realize adjustment of a larger installation angle, namely an installation distance.
As shown in fig. 6 and 7, in order to make the tightness and the supportability of the flange connection between the connecting devices better, an insulating sealing structural member 6 with an oil guiding function is respectively inserted between the mounting flange and the movable flange 701 of the high-voltage junction box 8 of the transformer and between the mounting flange and the fixed flange 702 of the high-voltage junction device 9 of the electric dehydration tank, the insulating sealing structural member 6 is made of polytetrafluoroethylene and comprises a sealing gasket 601 and an insulating support 602, the sealing gasket 601 is sleeved on the insulating support 602, the outer wall of the insulating support 602 is divided into a left part and a right part with different lengths by the sealing gasket 601, the left part and the right part can be inserted into the corresponding flanges, an oil guiding groove 603 is formed 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 2, the outer side of the high-voltage lead 2 can provide a passage for the insulating oil 3 of the transformer, and the whole device and the residual gas can be immersed quickly.
The protruding ends of the high-voltage lead 2, which are positioned in the high-voltage junction box 8 of the transformer and the high-voltage junction device 9 of the electric dehydration tank, are respectively welded with round connecting terminals, and the pointed ends and burrs of the high-voltage junction can be avoided through the round connecting terminals, and local electric field concentration is generated, so that discharge is initiated.
The installation method of the high-voltage flexible connection device for the crude oil electric dehydration transformer comprises the following specific steps:
step one: opening an upper cover of the high-voltage wiring device 9 of the electric dehydration tank, cleaning the inside of the high-voltage wiring device 9 of the electric dehydration tank, connecting one end of a high-voltage lead 2 with a high-voltage wiring terminal in the high-voltage wiring device 9 of the electric dehydration tank, penetrating the other end of the high-voltage lead 2 out of the 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 wire 2 passes through a high-voltage lead wire cavity 604 in the insulating sealing structural member 6, and then the long end of the insulating sealing structural member 6 is inserted into a mounting flange on the upper cover of the high-voltage wiring device 9 of the electric dehydration tank;
step two: the stainless steel thread weaving flexible connecting pipe 1 is sleeved on the high-voltage lead 2, and a plurality of cross-shaped wafers 4 and insulating sleeves 5 are sequentially sleeved on the high-voltage lead 2 alternately until the stainless steel thread weaving flexible connecting pipe 1 is filled;
step three: inserting the long end of the other insulating sealing structural member 6 into the mounting flange of the high-voltage junction box 8 of the transformer, and then passing the high-voltage lead 2 through the high-voltage lead cavity 604 of the insulating sealing structural member 6;
step four: fixing a fixing flange 701 with a mounting flange of a high-voltage wiring device 9 of an electric dehydration tank through mounting bolts, adjusting a movable flange 702 and a stainless steel threaded woven flexible connecting pipe 1 by comprehensively considering factors such as radian, stress, position and the like, and fastening the movable flange 702 with the mounting flange of a high-voltage wiring box 8 of the transformer;
step five: the other end of the high-voltage lead wire 2 is connected 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 high-voltage junction box 8 of the transformer until the high-voltage junction box 8 of the transformer is full;
step seven: the sealing cover 801 of the high-voltage junction box 8 of the transformer is fastened, so that the tightness of the whole device is ensured.
In the sixth step, the specific injection process of the transformer insulation oil 3 is to inject the transformer insulation oil 3 into the transformer high-voltage junction box 8 first, observe after the transformer insulation oil 3 fills the whole electric dehydration tank high-voltage junction device 9, and fill the transformer insulation oil 3 again until the whole transformer high-voltage junction box 8 is full after the transformer insulation oil 3 completely submerges the oil guiding groove 603 and no bubbles emerge.
During maintenance, the sealing cover 801 of the high-voltage junction box 8 of the transformer is firstly opened, the insulating oil 3 of the transformer is discharged through the oil drain port 901 of the high-voltage junction device 9 of the electric dehydration tank, and then the insulating oil is reversely disassembled and replaced according to the process.
In the foregoing, the present invention is merely preferred embodiments, which are based on different implementations of the overall concept of the invention, and the protection scope of the invention is not limited thereto, and any changes or substitutions easily come within the technical scope of the present invention as those skilled in the art should not fall within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to 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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