An adjustable converter transformer valve side riser support structure

Abstract

The utility model belongs to transformer manufacturing field relates to a kind of adjustable converter transformer valve side lifting seat support structure, and the both sides of oil tank body are connected with support beam one and support beam three one end, and the other end of support beam one is connected with the middle part of support beam three by being inclined downward, and support beam two is installed between the other end of a pair of support beam three, support column one and support column two are installed on the upper surface of support beam two, support column one and support column two are located below valve side lifting seat, and insulation structure is arranged between the lower surface of support column one, support column two and the upper surface of support beam two, full thread stud is installed on the upper surface of support column one and support column two, fastening nut one, flat washer one and adjusting nut are sleeved from top to bottom on full thread stud, and the upper end of full thread stud passes through connecting mechanism, and connecting mechanism is welded on the lower surface of valve side sleeve pipe end portion. The utility model is convenient for transportation, assembly and later maintenance, can realize millimeter level height fine adjustment, and reduce the mechanical stress of forced height adjustment.

Description

Technical Field

[0001] This utility model belongs to the field of transformer manufacturing technology, specifically relating to an adjustable converter transformer valve side riser support structure. Background Technology

[0002] High-voltage direct current (HVDC) transmission technology, with its advantages of long distance, large capacity, and low loss, has become a core solution for inter-regional power grid interconnection and clean energy consumption. As the "heart" of the HVDC transmission system, the converter transformer plays an irreplaceable and crucial role in the AC / DC power conversion process.

[0003] As the capacity of converter transformers continues to increase, especially with the corresponding increase in valve-side bushing current, the diameter of the valve-side riser seat has increased, leading to a proportional increase in the overall weight of the valve-side outgoing line system. This results in insufficient support strength for the existing valve-side riser seats of converter transformers. Furthermore, extreme environmental factors such as transformer vibration, earthquakes, or strong winds during field operation also require sufficient mechanical and support strength for the valve-side riser seats. In addition, some converter transformer structures, after the transformer body is lowered into the tank, have errors in the actual insertion depth of the valve-side bushing due to factors such as the design of its positioning structure, insufficient allowable deviation in bushing insertion depth, and the weight of the outgoing line equipment itself. As these errors accumulate, the valve-side bushing and valve-side riser seat cannot meet the required insulation distance after installation. Summary of the Invention

[0004] To solve the above-mentioned technical problems, this utility model provides an adjustable valve-side riser support structure for a converter transformer. The technical solution adopted by this utility model is as follows: An adjustable converter transformer valve-side riser support structure includes fully threaded studs, support beam one, support beam two, and support beam three. One end of support beam one and support beam three are fixedly connected to opposite sides of the tank body via bolts. The other end of support beam one is inclined downwards and fixedly connected to the middle of support beam three via bolts. A horizontally positioned support beam two is fixedly installed above the other ends of a pair of support beam three via bolts. Support column one and support column two are fixedly installed on the upper surface of support beam two via bolts. Support column one and support column two are respectively located at... An insulating structure is installed between the lower surface of the first support column, the lower surface of the second support column, and the upper surface of the second support beam directly below the two-phase valve side riser. The upper ends of the first and second support columns are respectively fixedly connected to a pair of fully threaded studs. The fully threaded studs are fitted with a fastening nut, a flat washer, and an adjusting nut from top to bottom. The upper end of the fully threaded studs passes through the horizontal plate at the bottom of the connecting mechanism. The fastening nut is located on the upper side of the horizontal plate of the connecting mechanism, and the flat washer and the adjusting nut are located on the lower side of the horizontal plate of the connecting mechanism. The upper part of the connecting mechanism is welded to the lower surface of the valve side sleeve end.

[0005] Preferably, rectangular base plates arranged vertically are welded to opposite sides of the tank body. Blind holes are opened on the surface of the rectangular base plates. End connecting plates are welded to the ends of support beam 1 and support beam 3. Through holes corresponding to blind holes are opened on the end connecting plates. Bolts pass through the through holes and are screwed into the blind holes to fix support beam 1 and support beam 3 to the rectangular base plates.

[0006] Preferably, a pair of support beams three are fixedly connected to support beam four by bolts. Support beam four is located on the upper surface of support beam three and is a reinforcing rib with an X-shaped structure.

[0007] Preferably, support beam one, support beam two, support beam three and support beam four are all made of H-beams, with hooks and grounding nuts welded onto the H-beams.

[0008] Preferably, a locking washer is installed on the upper surface of the adjusting nut.

[0009] Preferably, the lower end of the support column one is integrally formed with a convex plate structure. The convex plate structure and the upper plate of the H-shaped steel of the support beam two have corresponding through holes three. After the fastening bolt passes through the through hole three, it is used with the fastening nut two to fix the support column one and the support beam two. An insulating structure is installed on the fastening bolt.

[0010] Preferably, the insulating structure includes a metal washer, a circular insulating washer, an insulating tube, and a square insulating washer fitted on the fastening bolt. The square insulating washer is located between the convex plate structure and the upper panel of the H-beam. The metal washer and the circular insulating washer are located between the nut of the fastening bolt and the convex plate structure. The insulating tube is located in the through hole three of the convex plate structure and the upper panel of the H-beam. The height of the insulating tube is greater than the total thickness of the convex plate structure, the square insulating washer, and the upper panel of the H-beam.

[0011] Preferably, the circular and square insulating washers are made of unsaturated polyester glass felt laminate, and the insulating tube is made of epoxy glass cloth laminate.

[0012] Preferably, the valve-side sleeve is fixedly connected to the sleeve flange via an adjusting flange, and several gaskets are provided between the adjusting flange and the sleeve flange.

[0013] Preferably, a washer assembly is provided on the lower surface of the upper panel of the H-beam of the second support beam. The washer assembly includes a flat washer and a spring washer.

[0014] The beneficial effects of this utility model are: The support beams and columns of this utility model are all fixed by bolt connection. Under the premise that the support structure has good mechanical strength, it is easier to transport, assemble and maintain. At the same time, it can adapt to the installation requirements of converter transformers of different voltage levels. The vertical and horizontal layout of the support structure takes into account both compactness and expandability, which saves installation space and leaves interfaces for the subsequent installation of monitoring equipment, thereby better ensuring the safe operation of the converter transformer. The fully threaded stud, together with the adjusting nut, flat washer and fastening nut, can realize millimeter-level height fine adjustment, effectively compensating for the foundation error of the converter transformer or the manufacturing tolerance of related components such as the transformer body, tank body, valve side riser seat, etc., and effectively reducing the mechanical stress during forced height adjustment. Attached Figure Description

[0015] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are some specific embodiments of this utility model. For those skilled in the art, other drawings that fall within the scope of protection of this application can be obtained based on these drawings without creative effort. Figure 1 This is a front view of the overall structure of the converter transformer valve side output system according to an embodiment of this utility model; Figure 2 This is a front view of the valve-side riser support structure according to an embodiment of the present utility model; Figure 3 This is a left view of the valve-side riser support structure according to an embodiment of the present utility model; Figure 4 This is a schematic diagram of the structure of the insulating component at the support in an embodiment of the present invention; Figure 5 This is a schematic diagram of the installation of the sleeve flange and the regulating flange according to an embodiment of the present utility model; In the diagram, 1 is the oil tank body, 2 is the valve-side riser seat, 3 is the sleeve flange, 4 is the valve-side sleeve, 5 is the valve-side riser seat support structure, 6 is the fully threaded stud, 7 is the connecting mechanism, 8 is the rectangular base plate, 9 is support beam one, 10 is support beam two, 11 is support beam three, 12 is support beam four, 13 is the washer assembly, 14 is the flat washer one, 15 is the adjusting nut, 16 is support column one, 17 is support column two, 18 is the insulation structure, 19 is the metal washer, 20 is the round insulating washer, 21 is the insulating tube, 22 is the square insulating washer, 23 is the sleeve flange equipotential nut, 24 is the adjusting flange equipotential nut, 25 is the adjusting flange, and 26 is the fastening nut one. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings and through embodiments. The specific implementation process is as follows: like Figure 1 The diagram shown is an overall structural schematic of the converter transformer valve-side outgoing line system according to an embodiment of this utility model. The converter transformer valve-side outgoing line system includes a valve-side riser seat 2, a valve-side bushing 4, and a valve-side riser seat support structure 5. Two-phase valve-side riser seats 2 are arranged on the valve short shaft box wall of the converter transformer body. One end of the valve-side riser seat 2 ( Figure 1 The valve-side bushing 4 (right end) is fixedly installed on the outer side of the tank body 1 via flange and bolts. The valve-side bushing 4 is fixedly installed on the other end of the valve-side riser seat 2 via bushing flange 3. The valve-side riser seat support structure 5 is fixedly installed on the tank body 1. The valve-side riser seat support structure 5 is adjustablely fixedly connected to the connecting mechanism 7 welded to the lower surface of the other end of the valve-side bushing 4 via a fully threaded stud 6. The valve-side riser seat support structure 5 provides reliable support for the valve-side riser seat 2 from below. An adjusting nut 15 is threaded onto the fully threaded stud 6. By adjusting the position of the adjusting nut 15, the support height of the valve-side riser seat support structure 5 can be quickly adjusted. In the converter transformer involved in this utility model embodiment, there are only two valve-side bushings 4, which extend obliquely on the short shaft side wall, while the grid-side bushing and neutral point bushing extend straight out on the tank cover.

[0017] The valve-side riser support structure 5 is fixedly installed on the oil tank body 1 by a rectangular base plate 8. A pair of rectangular base plates 8 arranged vertically are welded on opposite sides of the oil tank body 1. A blind hole threaded hole is opened on the surface of the rectangular base plate 8. The bolt is screwed into the blind hole threaded hole of the rectangular base plate 8 to fix the valve-side riser support structure 5 on the rectangular base plate 8.

[0018] like Figure 2 , 3 As shown, the valve-side riser support structure 5 is an irregularly shaped bracket, including support beam 9, support beam 10, support beam 31, and support beam 42. There are two support beams 9 and 31. Support beam 9 is inclined, and support beam 31 is horizontal. The ends of support beams 9 and 31 connect to the rectangular base plate 8. Figure 1Both the right end and the middle end of the support beam 9 are welded with end connecting plates. A through hole corresponding to the blind hole threaded hole of the rectangular base plate 8 is opened on the end connecting plate. Bolts are passed through the through hole and screwed into the blind hole threaded hole to fix the right end of the support beam 9 and the support beam 3 11 to the rectangular base plate 8. The other end of the support beam 9 is inclined downwards and fixedly connected to the middle of the support beam 3 11 by bolts. A horizontally arranged support beam 2 10 is fixedly connected above the other ends of a pair of support beams 3 11 by bolts. A horizontally arranged support beam 4 12 is fixedly connected between a pair of support beams 3 11 by bolts. The support beam 4 12 is located on the upper surface of the support beam 3 11 and is an X-shaped reinforcing rib. The support beam 4 12 effectively improves the mechanical strength of the valve side riser support structure 5, reasonably distributes the load of the valve side sleeve 4, reduces local stress concentration, improves the overall bending and torsional resistance, and ensures the stability of the valve side riser support structure 5 under strong wind or earthquake conditions.

[0019] Support beams 9, 10, 11, and 12 are all made of H-beams, constructed from high-strength Q355D low-alloy steel plates. Hooks for easy lifting and grounding nuts for equidistant positioning are welded onto the H-beams. Nitrile rubber damping pads are installed at the connections between support beams 9, 10, 11, and 12 to effectively buffer vibrations during the operation of the converter transformer, reduce mechanical wear, and extend equipment life.

[0020] The support beams of the valve-side riser support structure 5 are sturdy and can effectively withstand the weight of the valve-side outgoing line system and the mechanical stress during operation, ensuring long-term stable operation of the equipment. The valve-side riser support structure 5 adopts a segmented bolted connection structure, and the support beams and columns facilitate transportation, assembly, and subsequent maintenance, while also adapting to the installation requirements of converter transformers of different voltage levels. The vertical and horizontal layout of the valve-side riser support structure 5 balances compactness and expandability, saving installation space while reserving interfaces for future installation of monitoring equipment.

[0021] Support column 16 and support column 27 are bolted to the upper surface of support beam 20. Support column 16 and support column 27 are located directly below the two-phase valve side riser seat 2. An insulating structure 18 is provided between the lower surface of support column 16 and support column 27 and the upper surface of support beam 20. A pair of fully threaded studs 6 are fixedly connected (either by thread or by welding) to the upper surfaces of support column 16 and support column 27 respectively. The fully threaded studs 6 are fitted with a fastening nut 26 (threaded connection), several flat washers 14 and adjusting nuts 15 (threaded connection) from top to bottom. By increasing or decreasing the number of flat washers 14, the support height of the valve side riser seat support structure 5 can be quickly adjusted. After the upper end of the fully threaded stud 6 passes through the horizontal plate at the bottom of the connecting mechanism 7, the fastening nut 26 is located on the upper side of the horizontal plate of the connecting mechanism 7, and the flat washer 14 and adjusting nut 15 are located on the lower side of the horizontal plate of the connecting mechanism 7. By adjusting the position of the adjusting nut 15 and the number of flat washers 14, the height of the valve side riser support structure 5 can be quickly adjusted, so that the valve side riser support structure 5 can reliably support the valve side riser 2 above the connecting mechanism 7. The connecting mechanism 7 can be designed with various structures according to installation needs. The bottom of the connecting mechanism 7 is a horizontal plate, and the upper part of the connecting mechanism 7 is welded to the lower surface of the valve side sleeve 4. The connecting mechanism 7 and the valve side riser support structure 5 are reliably connected by tightening the fastening nut 26.

[0022] The fully threaded stud 6, in conjunction with the upper and lower fastening nuts 26 and adjusting nuts 15, as well as the flat washer 14, enables millimeter-level height fine-tuning. Furthermore, a locking washer can be added to the adjusting nut 15. This dual fastening scheme of adjusting nut 15 and locking washer ensures no displacement under vibration conditions, effectively compensating for errors in the converter transformer foundation or manufacturing tolerances of components such as the transformer body, tank body 1, and valve-side riser 2. This ensures precise insertion depth of the valve-side sleeve 4 and effectively reduces mechanical stress during forced height adjustment.

[0023] like Figure 4As shown, the lower end of the support column 16 is integrally formed with a convex plate structure. The convex plate structure of the support column 16 and the upper panel (the "H"-shaped steel includes the upper panel, the vertical plate and the lower panel) of the support beam 10 are provided with corresponding through holes 3. The hexagonal head fastening bolts pass through the through holes 3 and are used with fastening nuts 2 to fix the support column 16 and the support beam 10. The fastening bolts are equipped with high-performance insulation structures 18. The insulation structure 18 adopts a multi-layer composite structure design, including a metal washer 19 fitted onto the fastening bolt, a circular insulating washer 20, an insulating tube 21, and a square insulating washer 22. The square insulating washer 22 is located between the convex plate structure of support column 16 and the upper panel of support beam 10. The metal washer 19 and the circular insulating washer 20 are located between the nut of the fastening bolt and the convex plate structure of support column 16. The insulating tube 21 is located in the through hole 3 of the convex plate structure of support column 16 and the upper panel of support beam 10. The designed height of the insulating tube 21 is 2-3 mm higher than the total thickness of the convex plate structure of support column 16, the square insulating washer 22, and the upper panel of support beam 10. The installation structure of support column 17 is the same as that of support column 16.

[0024] Furthermore, a washer assembly 13 can be installed on the lower surface of the upper panel of the second support beam 10. The washer assembly 13 is fitted onto the lower end of the fastening bolt and is located between the lower surface of the upper panel of the second support beam 10 and the upper surface of the second fastening nut. The washer assembly 13 includes a standard flat washer and a spring washer. By installing the washer assembly 13, a better fastening connection can be achieved between the first support column 16 and the second support column 17 and the second support beam 10.

[0025] During the operation of the converter transformer, in order to prevent the anti-rust paint layer on the valve-side riser support structure 5 from peeling off due to harsh natural conditions such as dampness and dirt, which could lead to circulating current problems, insulation components 18 are installed on support column 16, support column 217, and support beam 20. Square insulating washers 22 serve as the base layer insulation component, made of unsaturated polyester glass felt laminate, which has sufficient mechanical strength and excellent electrical insulation performance. Insulating tubes 21 serve as the intermediate layer insulation component, made of epoxy glass cloth laminate, which has good pressure resistance, heat resistance, aging resistance, and insulation. The upper circular insulating washers 20 are also made of unsaturated polyester glass felt laminate, which has excellent arc resistance and aging resistance. Metal washers 19 are installed at the top of the fastening bolts, and washer components 13 are used at the bottom of the fastening bolts for further tightening, which ensures structural stability and forms reliable potential isolation.

[0026] like Figure 5As shown, the bushing flange 3 has two blind holes and two threaded holes. A sealing groove is cut on the surface of the bushing flange 3 at a position corresponding to the adjusting flange 25. The diameter of the sealing groove is smaller than the diameter of the circle formed by the two blind holes and two threaded holes. Two pairs of bushing flange equipotential nuts 23 are welded onto the bushing flange 3. Several through holes are evenly distributed along the periphery of the adjusting flange 25, corresponding to the two blind holes and threaded holes. The adjusting flange 25 is fastened to the bushing flange 3 using flange connecting bolts. A pair of handle protrusions with a 90° included angle are integrally formed on the outer edge of the bushing flange 3 (other numbers of handle protrusions can also be used, as long as they are evenly distributed). Adjusting flange equipotential nuts 24 are welded to the upper surfaces of the pair of handle protrusions. During the operation of the converter transformer, the adjusting flange equipotential nuts 24 and the bushing flange equipotential nuts 23 are connected via equipotential lines. The handle protrusion design allows for more prominent adjustment and fixation of the adjusting flange 25 by aligning it with the grounding of the bushing flange 3. The number of regulating flanges 25 may be adjusted based on the actual site conditions. Four sleeve flange equipotential nuts 23 are welded to the sleeve flange 3 to correspond to the installation requirements of two regulating flanges 25. The two regulating flanges 25 are rotated in different directions to connect with the four sleeve flange equipotential nuts 23 on the sleeve flange 3. If only one regulating flange 25 needs to be installed on site, only two of the sleeve flange equipotential nuts 23 need to be connected, leaving the other two sleeve flange equipotential nuts 23 unconnected.

[0027] The regulating flange 25 is made of low alloy steel plate. The valve side sleeve 4 is installed on the outer side of the regulating flange 25. When installing the valve side sleeve 4, threaded through holes need to be drilled on the regulating flange 25 according to the bolt holes of the valve side sleeve 4. The two are connected by fasteners such as bolts, nuts, and flat washers / spring washers. In order to better seal and prevent oil leakage, a second sealing groove is drilled on the regulating flange 25. The outer diameter of the second sealing groove is smaller than the diameter of the circle formed by the threaded through holes. Sealing gaskets are placed in the first and second sealing grooves for better sealing.

[0028] The adjustment between the regulating flange 25 and the bushing flange 3 can be made by adding or removing shims, allowing for fine-tuning of the vertical height of the converter transformer valve-side output system. This effectively compensates for manufacturing tolerances of the tank body 1, valve-side riser seat 2, etc., foundation construction errors, or installation deviations of the valve-side riser seat support structure 5. This design avoids the forced assembly problems caused by dimensional mismatches in traditional fixed supports, ensuring precise alignment of the valve-side output system after assembly into the tank, reducing mechanical stress, and improving sealing reliability. The regulating flange 25 adopts a standardized design, requiring only bolt adjustment or shim addition / removal for calibration during installation, significantly shortening the construction cycle and reducing labor and material costs.

[0029] The valve-side riser support structure 5 provided in this embodiment of the utility model adopts advanced design concepts and manufacturing processes. By rationally arranging its overall structure, optimizing the connection structure of each support component, selecting high-strength materials, using adjustable connecting bolts, adjustable flanges, and adding buffer insulation protection design at the bracket connection, it effectively solves the overall strength problem of the valve-side riser of the converter transformer. It can further improve the operational stability and reliability of the converter transformer, and realize functions such as highly flexible adjustment, stable support and convenient installation. It is suitable for the on-site installation needs of converter transformers of different specifications, and provides a strong guarantee for the safe and efficient operation of the power system.

[0030] Finally, it should be noted that the above embodiments are merely specific implementations of this utility model, used to illustrate the technical solution of this utility model, and not to limit it. The protection scope of this utility model is not limited thereto. Those skilled in the art should understand that any person skilled in the art can modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the technical scope disclosed in this utility model; and these modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model, and should all be covered within the protection scope of this utility model.

Claims

1. An adjustable converter transformer valve-side riser support structure, comprising a fully threaded stud (6), a first support beam (9), a second support beam (10), and a third support beam (11), characterized in that, Two support beams (9) and two support beams (11) are fixedly connected to the opposite sides of the tank body (1) by bolts at one end. The other end of support beam (9) is inclined downward and fixedly connected to the middle of support beam (11) by bolts. A horizontally arranged support beam (10) is fixedly installed above the other end of a pair of support beams (11) by bolts. Support column (16) and support column (17) are fixedly installed on the upper surface of support beam (10) by bolts. Support column (16) and support column (17) are located directly below the two-phase valve side riser seat (2). The lower surface of support column (16) and support column (17) are respectively located below the two-phase valve side riser seat (2). An insulating structure (18) is provided between the surface of the support beam (10) and the upper surface of the support column (16) and the support column (17). A pair of fully threaded studs (6) are fixedly connected to the upper ends of the support column (16) and the support column (17). The fully threaded studs (6) are fitted with a fastening nut (26), a flat washer (14) and an adjusting nut (15) from top to bottom. The upper end of the fully threaded studs (6) passes through the horizontal plate at the bottom of the connecting mechanism (7). The fastening nut (26) is located on the upper side of the horizontal plate of the connecting mechanism (7). The flat washer (14) and the adjusting nut (15) are located on the lower side of the horizontal plate of the connecting mechanism (7). The upper part of the connecting mechanism (7) is welded to the lower surface of the valve side sleeve (4).

2. The adjustable converter transformer valve-side riser support structure according to claim 1, characterized in that, Rectangular base plates (8) arranged vertically are welded to the opposite sides of the tank body (1). Blind holes and threaded holes are opened on the surface of the rectangular base plates (8). End connecting plates are welded to the ends of support beams 1 (9) and 3 (11). Through holes corresponding to blind holes and threaded holes are opened on the end connecting plates. Bolts pass through through holes and are screwed into blind holes and threaded holes to fix support beams 1 (9) and 3 (11) to the rectangular base plates (8).

3. The adjustable converter transformer valve-side riser support structure according to claim 2, characterized in that, A pair of support beams three (11) are fixedly connected to support beam four (12) by bolts. Support beam four (12) is located on the upper surface of support beam three (11) and support beam four (12) is a reinforcing rib with an X-shaped structure.

4. The adjustable converter transformer valve-side riser support structure according to claim 3, characterized in that, Support beam 1 (9), support beam 2 (10), support beam 3 (11) and support beam 4 (12) are all made of H-beams, with hooks and grounding nuts welded on the H-beams.

5. The adjustable converter transformer valve-side riser support structure according to claim 1, characterized in that, A locking washer is installed on the upper surface of the adjusting nut (15).

6. The adjustable converter transformer valve-side riser support structure according to claim 1, characterized in that, The lower end of the support column 1 (16) is integrally formed with a convex plate structure. The convex plate structure and the upper plate of the H-beam of the support beam 2 (10) have corresponding through holes 3. After the fastening bolt passes through the through hole 3, it is used with the fastening nut 2 to fix the support column 1 (16) and the support beam 2 (10) in place. An insulating structure (18) is installed on the fastening bolt.

7. The adjustable converter transformer valve-side riser support structure according to claim 6, characterized in that, The insulating structure (18) includes a metal washer (19) fitted on the fastening bolt, a circular insulating washer (20), an insulating tube (21), and a square insulating washer (22). The square insulating washer (22) is located between the convex plate structure and the upper panel of the H-beam. The metal washer (19) and the circular insulating washer (20) are located between the nut of the fastening bolt and the convex plate structure. The insulating tube (21) is located in the through hole three of the convex plate structure and the upper panel of the H-beam. The height of the insulating tube (21) is greater than the total thickness of the convex plate structure, the square insulating washer (22), and the upper panel of the H-beam.

8. The adjustable converter transformer valve-side riser support structure according to claim 7, characterized in that, The circular insulating gasket (20) and the square insulating gasket (22) are made of unsaturated polyester glass felt laminate, and the insulating tube (21) is made of epoxy glass cloth laminate.

9. The adjustable converter transformer valve-side riser support structure according to claim 1, characterized in that, The valve side sleeve (4) is fixedly connected to the sleeve flange (3) through the adjusting flange (25), and several gaskets are set between the adjusting flange (25) and the sleeve flange (3).

10. The adjustable converter transformer valve-side riser support structure according to claim 3, characterized in that, A washer assembly (13) is provided on the lower surface of the upper H-beam panel of the second support beam (10). The washer assembly (13) includes a flat washer and a spring washer.

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