A fixing device for equalizing tube and transformer

Abstract

This invention discloses a fixing device for an equalizing pipe and a transformer. The fixing device for the equalizing pipe includes: a mounting base with a through hole for the equalizing pipe to pass through; a limiting member for being sleeved on the equalizing pipe, the limiting member having a limiting portion; and a fixing member with a clamping portion, the clamping portion being tightly fitted to the limiting member, and the fixing member being disposed on the mounting base, the fixing member abutting against the limiting portion of the limiting member to prevent the limiting member from falling out. The fixing device for the equalizing pipe provided by this invention, by having the clamping portion of the fixing member tightly fitted to the limiting member sleeved on the equalizing pipe and fixing the limiting member to the mounting base, prevents the equalizing pipe from loosening. Simultaneously, by having the limiting portion on the limiting member abutting against the fixing member, it prevents the limiting member from falling out, reducing the risk of damage to the pipe wall of the equalizing pipe, thereby improving the reliability of the equalizing pipe fixing device.

Description

Technical Field

[0001] This invention relates to the field of power system transformer technology, and more specifically, to a device for fixing an equalizing tube and a transformer. Background Technology

[0002] Transformers are crucial power transmission and distribution equipment in power systems, converting electrical energy from one voltage to another. Currently, the compound annual growth rate of electricity consumption exceeds 6.65%, with rapidly increasing electricity demand. Large-capacity, long-distance power transmission has become the main direction of power development. Ultra-high voltage and extra-high voltage transmission have comprehensive advantages such as long distance, large capacity, low loss, and small land occupation, which can significantly improve the safety, reliability, flexibility, and economy of the power grid itself.

[0003] In the existing technology, during the transportation of transformers, the traditional lead equipotential bonding tube fixing device mainly uses clamps for fixation. The fixing method is relatively simple and can easily cause the lead equipotential bonding tube to loosen during transportation. This causes continuous friction between the lead equipotential bonding tube and the clamps, resulting in damage to the tube wall. Consequently, the copper stranded wires inside the tube cannot be protected, increasing the risk of damage to the copper stranded wires. This leads to low reliability of the equipotential bonding tube fixing device.

[0004] Therefore, how to improve the reliability of the equalizing pipe fixing device has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a fixing device for an equalizing pipe, so as to improve the reliability of the equalizing pipe fixing device.

[0006] Another object of the present invention is to provide a transformer having the above-described equalizing tube fixed device.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A device for fixing an equalizing pipe, comprising:

[0009] Mounting base with through hole for equalizing pipe to pass through;

[0010] A limiting member is used to be sleeved on the equalizing pipe, and the limiting member is provided with a limiting part;

[0011] The fixing member is provided with a clamping part, which is close to the limiting member, and the fixing member is disposed on the mounting base. The fixing member abuts against the limiting part of the limiting member to prevent the limiting member from falling out.

[0012] Optionally, in the above-mentioned fixing device for the equalizing tube, a first insulating layer is provided on the outer side of the equalizing tube. The first insulating layer is a conical structure covered by insulating material on the outer side of the equalizing tube. The limiting member has a small-diameter end and a large-diameter end that cooperate with the first insulating layer, so that the limiting member is in close contact with the insulating layer of the equalizing tube. The limiting part is provided at the large-diameter end of the limiting member. The small-diameter end of the limiting member passes through the through hole of the mounting base, so that a second insulating layer is covered on the outer side of the limiting member. The clamping part of the fixing member is in close contact with the second insulating layer on the outer side of the limiting member.

[0013] Optionally, in the above-mentioned fixing device for the equalizing pipe, the limiting part is an annular structure disposed on the outer side wall of the large-diameter end of the limiting member.

[0014] Optionally, in the above-mentioned fixing device for the equalizing pipe, the fixing member includes a clamping member, the clamping part being a contact surface located on the clamping member, and the contact surface being in close contact with the limiting member.

[0015] Optionally, in the above-mentioned fixing device for the equalizing pipe, the clamping member includes at least a first clamping member and a second clamping member, and both the first clamping member and the second clamping member are provided with the clamping portion, so that the limiting member is located between the clamping portion of the first clamping member and the clamping portion of the second clamping member.

[0016] Optionally, in the above-mentioned fixing device for the equalizing pipe, the clamping portion of the first clamping member and the clamping portion of the second clamping member are both arc-shaped contact surfaces.

[0017] Optionally, in the above-mentioned fixing device for the equalizing pipe, the mounting base is provided with a connecting part, which is used to movably connect with the support frame.

[0018] Optionally, in the above-mentioned fixing device for the equalizing pipe, the connecting part is provided with an adjusting sliding hole for adjusting the position of the mounting seat, and the support frame is provided with a threaded hole that mates with the adjusting sliding hole, so that the mounting seat is fixed on the support frame.

[0019] Optionally, in the above-mentioned fixing device for the equalizing pipe, the fixing member is located between the mounting base and the limiting part of the limiting member, so that the fixing member is fixed on the mounting base and abuts against the limiting part.

[0020] Optionally, in the above-mentioned fixing device for the equalizing pipe, the fixing member is provided with a mounting hole for fixing the fixing member to the mounting base by fasteners.

[0021] A transformer, comprising:

[0022] Supporting framework;

[0023] Equalizing tube, used to connect windings and bushings;

[0024] A fixing mechanism, comprising a fixing device and a clamping assembly, wherein the fixing device is a fixing device for the equalizing pipe as described in any of the preceding claims, the mounting base is disposed on the support frame, and the clamping assembly is disposed on the support frame for clamping the equalizing pipe, and the clamping assembly and the fixing device are arranged at intervals.

[0025] Optionally, in the above-mentioned transformer, the equalizing tube includes an aluminum tube, and a copper stranded wire for carrying current passes through the aluminum tube to realize the electrical connection between the winding and the bushing. A first insulating layer is provided on the outside of the aluminum tube. The first insulating layer has a conical structure, with the small diameter end of the first insulating layer located on the winding side and the large diameter end of the first insulating layer located on the bushing side.

[0026] Optionally, in the above-mentioned transformer, the clamping assembly includes a limiting component and a clamp. The limiting component is disposed on the outside of the equalizing pipe, and the clamp is detachably disposed on the support frame. The clamp clamps the limiting component to fix the equalizing pipe.

[0027] Optionally, in the above-mentioned transformer, the limiting assembly includes a limiting insulating cylinder and limiting rings disposed at both ends of the limiting insulating cylinder. The limiting insulating cylinder is attached to the outside of the equalizing pipe. The clamp is located between the limiting rings at both ends of the limiting insulating cylinder and clamps the limiting insulating cylinder. The limiting rings are used to prevent the clamp from coming off.

[0028] Optionally, in the above-mentioned transformer, there are multiple limiting insulating cylinders, and each limiting insulating cylinder is sequentially arranged on the outside of the equalizing pipe. A support member of the same height as the limiting insulating cylinder is arranged between adjacent limiting insulating cylinders. There are multiple support members, and each support member is evenly distributed along the circumference of the limiting insulating cylinder.

[0029] The pressure equalizing pipe fixing device provided by the present invention connects the pressure equalizing pipe by sleeve of a limiting member onto the pressure equalizing pipe, and fixes the limiting member to the mounting base by a fixing member provided on the mounting base. Specifically, the fixing member has a clamping part that is in close contact with the limiting member, and a limiting part is provided on the limiting member that abuts against the fixing member to prevent the limiting member from falling out.

[0030] Compared with the prior art, the pressure equalization pipe fixing device provided by the present invention uses the clamping part of the fixing member to fit tightly against the limiting member sleeved on the pressure equalization pipe and fix the limiting member on the mounting base to prevent the pressure equalization pipe from loosening. At the same time, the limiting part set on the limiting member abuts against the fixing member to prevent the limiting member from falling out, reducing the risk of damage to the pipe wall of the pressure equalization pipe, thereby improving the reliability of the pressure equalization pipe fixing device. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0032] Figure 1 Assembly diagram of the pressure equalization pipe fixing device provided in the embodiment of the present invention Figure 1 ;

[0033] Figure 2 Assembly diagram of the pressure equalization pipe fixing device provided in the embodiment of the present invention Figure 2 ;

[0034] Figure 3 A schematic diagram of the structure of the pressure equalization pipe fixing device provided in an embodiment of the present invention;

[0035] Figure 4 A top view of the pressure equalization pipe fixing device provided in an embodiment of the present invention;

[0036] Figure 5 This is a front view of the limiting member provided in an embodiment of the present invention;

[0037] Figure 6 A left view of the limiting member provided in an embodiment of the present invention;

[0038] Figure 7 A top view of the limiting member provided in an embodiment of the present invention;

[0039] Figure 8 A top view of the fastener provided in an embodiment of the present invention;

[0040] Figure 9 A top view of the first clamping member provided in an embodiment of the present invention;

[0041] Figure 10 A front view of the first clamping member provided in an embodiment of the present invention;

[0042] Figure 11 A left view of the first clamping member provided in an embodiment of the present invention;

[0043] Figure 12 A top view of the second clamping member provided in an embodiment of the present invention;

[0044] Figure 13 This is a front view of the second clamping member provided in an embodiment of the present invention;

[0045] Figure 14 A left view of the second clamping member provided in an embodiment of the present invention;

[0046] Figure 15 This is a schematic diagram of the clamp assembly provided in an embodiment of the present invention;

[0047] Figure 16 This is a top view of the limiting component provided in an embodiment of the present invention.

[0048] In this designation, 100 is a fixing device, 101 is a limiting component, 1011 is a limiting part, 102 is a fixing component, 1021 is a first clamping component, 1022 is a second clamping component, 1023 is a contact surface, 1024 is a mounting hole, 103 is a mounting base, 1031 is a connecting part, 200 is an equalizing pipe, 300 is a support frame, 400 is a clamping assembly, 401 is a limiting assembly, 4011 is a limiting ring component, 4012 is a limiting insulating cylinder, 4013 is a support component, and 402 is a clamp. Detailed Implementation

[0049] The core of this invention is to provide a fixing device for an equalizing pipe, so as to improve the reliability of the equalizing pipe fixing device.

[0050] Another core aspect of this invention is to provide a transformer with the aforementioned equalizing tube fixed device.

[0051] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0052] like Figure 3 and Figure 4As shown, this embodiment of the invention discloses a fixing device for an equalizing tube (hereinafter referred to as fixing device 100), including a mounting base 103, a limiting member 101, and a fixing member 102. It should be noted that in the prior art, during the transportation of transformers, the traditional fixing structure for lead equalizing tubes mainly relies on clamps for fixation. This fixing method is relatively simple and easily leads to loosening of the lead equalizing tube during transportation, causing continuous friction between the lead equalizing tube and the clamps. This damages the tube wall, resulting in the inability to protect the copper stranded wires inside the tube and increasing the risk of damage to the copper stranded wires. The fixing device 100 disclosed in this embodiment of the invention uses the clamping part of the fixing member 102 to fit tightly against the limiting member 101 sleeved on the equalizing pipe 200, and fixes the limiting member 101 on the mounting base 103 to prevent the equalizing pipe 200 from loosening. At the same time, by setting the limiting part 1011 on the limiting member 101 to abut against the fixing member 102, the limiting member 101 is prevented from falling out, reducing the risk of damage to the pipe wall of the equalizing pipe 200, thereby improving the reliability of the fixing device 100.

[0053] like Figure 3 As shown, the mounting base 103 has a through hole for the equalizing pipe 200 to pass through, and the mounting base 103 is fixed to the transformer support frame 300 so that the mounting base 103 cooperates with the fixing member 102 to fix the equalizing pipe 200, preventing the equalizing pipe 200 from loosening, thereby causing damage to the pipe wall and rendering the pipe body protection function ineffective. The mounting base 103 is provided with a connecting part 1031, which is movably connected to the support frame 300. Specifically, the mounting base 103 consists of two support plates fixed to the transformer support frame 300, and the connecting part 1031 is a vertical rib plate provided on the support plate. The two support plates are movably connected to the transformer support frame 300 through the vertical rib plates provided on the support plates. It should be noted that the through hole is a passage space formed between the two support plates for the equalizing pipe 200 to pass through.

[0054] In one specific embodiment, an adjusting sliding hole for adjusting the position of the mounting base 103 is provided on the connecting portion 1031, and a threaded hole that mates with the adjusting sliding hole is provided on the support frame 300, so that the mounting base 103 is fixed on the support frame 300. Specifically, the adjusting sliding hole is an elongated hole strip provided on the connecting portion 1031, and a threaded hole is provided on the support frame 300. By adjusting the position of the mounting base 103 vertically or horizontally, the mounting base 103 is positioned in a suitable location. At this time, a bolt is passed through the adjusting sliding hole and threadedly engaged with the threaded hole on the support frame 300 to fix the mounting base 103. It should be noted that the adjustment position range of the mounting base 103 is the range of the adjusting sliding hole, that is, it must be ensured that the threaded hole on the support frame 300 is within the range of the adjusting sliding hole. Of course, the method of adjusting the position of the mounting base 103 is not limited to setting adjustment sliding holes. It can also be done by setting through holes at intervals on the connecting part 1031. By adjusting the position of the mounting base 103 vertically or horizontally, the through holes correspond to the threaded holes on the support frame 300, and bolts are used for fixing.

[0055] It should be further explained that the mounting base 103 being in the appropriate position refers to the position where the mounting base 103 abuts against the fastener 102.

[0056] Furthermore, the limiting member 101 is sleeved on the equalizing pipe 200 to connect and fix the limiting member 101 and the equalizing pipe 200. The fixing member 102 is provided with a clamping part, which is close to the limiting member 101. The fixing member 102 is provided on the mounting base 103. The fixing member 102 is provided with a mounting hole 1024. The fixing member 102 is fixed to the mounting base 103 by fasteners through the mounting hole 1024 on the fixing member 102. The fasteners are then reinforced by adhesive, thereby fixing the equalizing pipe 200. Meanwhile, a limiting part 1011 is provided on the limiting member 101, and the fixing member 102 is located between the mounting base 103 and the limiting part 1011 of the limiting member 101, so that the fixing member is fixed on the mounting base 103 and abuts against the limiting part 1011 to prevent the limiting member 101 from falling out, thereby effectively preventing the equalizing pipe 200 from loosening in the horizontal and vertical directions. It should be noted that the limiting member 101 being sleeved on the equalizing pipe 200 means that the limiting member 101 is tightly attached to the outside of the equalizing pipe 200 and fixed to the equalizing pipe 200. The fixing method can be a chemical connection method such as adhesive, or a wire binding fixation method.

[0057] The fixing device 100 provided by the present invention connects the limiting member 101 and the pressure equalizing pipe 200 by sleeve of the limiting member 101 onto the pressure equalizing pipe 200, and fixes the limiting member 101 onto the mounting base 103 by the fixing member 102 provided on the mounting base 103. Specifically, the fixing member 102 has a clamping part that is in close contact with the limiting member 101, and a limiting part 1011 is provided on the limiting member 101. The limiting part 1011 abuts against the fixing member 102 to prevent the limiting member 101 from falling out.

[0058] Compared with the prior art, the fixing device 100 provided by the present invention uses the clamping part of the fixing member 102 to fit tightly against the limiting member 101 sleeved on the equalizing pipe 200, and fixes the limiting member 101 on the mounting base 103 to prevent the equalizing pipe 200 from loosening. At the same time, the limiting part 1011 provided on the limiting member 101 abuts against the fixing member 102 to prevent the limiting member 101 from falling out, thereby reducing the risk of damage to the pipe wall of the equalizing pipe 200 and improving the reliability of the equalizing pipe fixing device.

[0059] like Figure 3 As shown, in one specific embodiment, a first insulating layer is provided on the outside of the equalizing pipe 200. The first insulating layer is a tapered structure covered by insulating material on the outside of the equalizing pipe 200. Figure 5 and Figure 6 As shown, the limiting member 101 has a small-diameter end and a large-diameter end that mate with the first insulating layer, so that the limiting member 101 is tightly attached to the first insulating layer of the equalizing pipe 200. The limiting part 1011 is disposed at the large-diameter end of the limiting member 101, and the limiting part 1011 is an annular structure on the outer wall of the large-diameter end, such as... Figure 7As shown. The small-diameter end of the limiting member 101 passes through the through hole of the mounting base 103. Specifically, the equalizing tube 200 includes an aluminum tube, and a copper stranded wire for carrying current passes through the aluminum tube to realize the electrical connection between the winding and the bushing. A first insulating layer is provided on the outside of the aluminum tube. The first insulating layer has a conical structure. The small-diameter end of the first insulating layer is located on the winding side, and the large-diameter end of the first insulating layer is located on the bushing side to achieve a better shielding effect. When installing the limiting member 101, firstly, an insulating material is wrapped around the outside of the aluminum tube to form a conical structure. Then, the large-diameter end of the limiting member 101 is inserted from the small-diameter end of the first insulating layer until it is tightly fitted to the large-diameter end of the first insulating layer. At this time, the small-diameter end of the limiting member 101 is tightly fitted to the small-diameter end of the first insulating layer, thereby realizing the connection and fixation of the limiting member 101 and the equalizing pipe 200. At the same time, the small-diameter end of the limiting member 101 passes through the through hole of the mounting base 103. After the limiting member 101 is connected and fixed to the equalizing pipe 200, a second insulating layer is wrapped around the outside of the limiting member 101 to fill the gap between the limiting member 101 and the through hole of the mounting base 103, which can prevent the equalizing pipe 200 from shaking. The clamping part of the fixing member 102 is tightly fitted to the second insulating layer on the outside of the limiting member 101, and the ring-shaped limiting part 1011 abuts against the fixing member 102 to prevent the limiting member 101 from coming out of the through hole of the mounting base 103. It should be noted that insulating materials can be made of materials such as insulating paper.

[0060] Furthermore, in one specific embodiment, the fixing member 102 can be an integral structure, wherein the fixing member 102 includes a clamping member, the clamping part being a contact surface 1023 located on the clamping member, and the contact surface 1023 is in close contact with the limiting member 101. Of course, the fixing member 102 can also be a split structure composed of multiple clamping members, specifically, as shown in the example. Figure 8 As shown, there are at least two clamping components. For ease of understanding, the two clamping components are defined as the first clamping component 1021 and the second clamping component 1022, respectively. Figures 9 to 14As shown, both the first clamping member 1021 and the second clamping member 1022 are provided with clamping portions, so that the limiting member 101 is located between the clamping portions of the first clamping member 1021 and the second clamping member 1022. The clamping portions of the first clamping member 1021 and the second clamping member 1022 are both arc-shaped contact surfaces, which allows the first clamping member 1021 and the second clamping member 1022 to better fit with the limiting member 101, reducing the gap between the clamping member and the limiting member 101, preventing the equalizing tube 200 from loosening due to the loosening of the limiting member 101, thereby making the fixation of the equalizing tube 200 more secure and reliable. Of course, the clamping components are not limited to two; there can also be three, four, etc. In this embodiment, to save costs and simplify the installation method, two clamping components are used, and the two clamping components are respectively clamped on both sides of the limiting component 101. The first clamping component 1021 and the second clamping component 1022 are fixed to the mounting base 103 by fasteners. It should be noted that in order to ensure better fit between the first clamping component 1021 and the second clamping component 1022 and the limiting component 101, a second insulating layer is covered on the outside of the limiting component 101, thereby further reducing the gap between the clamping component and the limiting component 101 and preventing the equalizing pipe 200 from loosening due to the loosening of the limiting component 101.

[0061] like Figure 1 and Figure 2 As shown in the figure, this embodiment of the invention also discloses a transformer, including a support frame 300 and a fixing mechanism. The fixing mechanism includes a fixing device and a clamping assembly 400. This fixing device is the fixing device 100 disclosed in the above embodiment, and therefore possesses all the technical effects of the aforementioned fixing device 100, which will not be repeated here. Specifically, the mounting base 103 of the fixing device 100 is disposed on the support frame 300, while the clamping assembly 400 is disposed on the support frame 300 to clamp the equalizing pipe. The clamping assembly 400 and the fixing device are arranged at intervals to fix the equalizing pipe 200. Of course, the equalizing pipe 200 can also be fixed entirely using the fixing device 100. In this embodiment, to save costs, a combination of the fixing device 100 and the clamping assembly 400 is used, which prevents the equalizing pipe 200 from loosening while saving costs. It should be noted that the clamping assembly 400 is fixed to the support frame 300, and the fixing method can be a bolt connection.

[0062] like Figure 15As shown, in one specific embodiment, the clamping assembly 400 includes a limiting assembly 401 and a clamp 402. The limiting assembly 401 is disposed on the outside of the equalizing pipe 200, and the clamp 402 is detachably disposed on the support frame 300. The clamp 402 clamps the limiting assembly 401 to fix the equalizing pipe 200. The limiting assembly 401 includes a limiting insulating cylinder 4012 and limiting rings 4011 disposed at both ends of the limiting insulating cylinder 4012. The limiting insulating cylinder 4012 is tightly fitted to the outside of the equalizing pipe 200, and the clamp 402 is located between the limiting rings 4011 at both ends of the limiting insulating cylinder 4012 to prevent the clamp 402 from coming off, and the clamp 402 clamps the limiting insulating cylinder 4012. Specifically, the limiting insulating cylinder 4012 is tightly attached to the outside of the aluminum tube of the equalizing pipe 200, while the limiting ring 4011 is chemically connected to both ends of the limiting insulating cylinder 4012. The outer diameter of the limiting ring 4011 is larger than the outer diameter of the clamp 402, so that when the clamp 402 is located between the two limiting rings 4011, it can effectively prevent the clamp 402 from detaching from the outside of the equalizing pipe 200. It should be noted that the chemical connection is an adhesive bonding method.

[0063] Specifically, such as Figure 16 As shown, there are multiple limiting insulating cylinders 4012. Effective insulation is achieved when there are three limiting insulating cylinders 4012. Of course, four or five are also possible. To save material costs and avoid waste, in this embodiment, there are three limiting insulating cylinders 4012. For ease of understanding, the three limiting insulating cylinders 4012 are defined as the first limiting insulating cylinder, the second limiting insulating cylinder, and the third limiting insulating cylinder, respectively. Each limiting insulating cylinder 4012 is sequentially arranged on the outside of the equalizing pipe 200. Specifically, the first limiting insulating cylinder wraps around the outside of the aluminum tube of the equalizing pipe 200, the second limiting insulating cylinder wraps around the outside of the first limiting insulating cylinder, and the third limiting insulating cylinder wraps around the outside of the second limiting insulating cylinder. Furthermore, a support member 4013 of the same height as the limiting insulating cylinder 4012 is provided between adjacent limiting insulating cylinders 4012. Multiple support members 4013 are provided, evenly distributed along the circumference of the limiting insulating cylinder 4012. The support members 4013, the limiting insulating cylinders 4012, and the aluminum tube of the equalizing pipe 200 are chemically bonded. Insulating material is filled in the gaps between the limiting insulating cylinders 4012 to make the connection between the limiting insulating cylinders 4012 and the aluminum tube of the equalizing pipe 200 tighter. It should be noted that the limiting insulating cylinder 4012, support member 4013, limiting ring member 4011, and clamp 402 are all made of cardboard. Of course, other materials that can provide insulation, such as plastic, can also be used.

[0064] The terms "first" and "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units may include steps or units not listed, but rather steps or units not listed.

[0065] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A device for fixing an equalizing pipe, characterized in that, include: Mounting base (103) has a through hole for the equalizing pipe (200) to pass through; A limiting member (101) is used to be sleeved on the equalizing pipe (200), and the limiting member (101) is provided with a limiting part (1011). The fixing member (102) is provided with a clamping part, which is close to the limiting member (101), and the fixing member (102) is disposed on the mounting base (103). The fixing member (102) abuts against the limiting part (1011) of the limiting member (101) to prevent the limiting member (101) from falling out. The equalizing tube (200) is provided with a first insulating layer on its outer side. The first insulating layer is a tapered structure covered with insulating material on the outer side of the equalizing tube (200). The limiting member (101) has a small-diameter end and a large-diameter end that cooperate with the first insulating layer so that the limiting member (101) is in close contact with the insulating layer of the equalizing tube (200). The limiting part (1011) is provided at the large-diameter end of the limiting member (101). The small-diameter end of the limiting member (101) passes through the through hole of the mounting base (103). The limiting member (101) is covered with a second insulating layer on its outer side. The clamping part of the fixing member (102) is in close contact with the second insulating layer on the outer side of the limiting member (101).

2. The fixing device for the equalizing pipe according to claim 1, characterized in that, The limiting part (1011) is an annular structure disposed on the outer wall of the large-diameter end of the limiting member (101).

3. The fixing device for the equalizing pipe according to claim 1, characterized in that, The fixing member (102) includes a clamping member, the clamping part being a contact surface (1023) located on the clamping member, and the contact surface (1023) being in close contact with the limiting member (101).

4. The fixing device for the equalizing pipe according to claim 3, characterized in that, The clamping member includes at least a first clamping member (1021) and a second clamping member (1022), and both the first clamping member (1021) and the second clamping member (1022) are provided with the clamping portion, so that the limiting member (101) is located between the clamping portion of the first clamping member (1021) and the clamping portion of the second clamping member (1022).

5. The fixing device for the equalizing pipe according to claim 4, characterized in that, Both the clamping portion of the first clamping member (1021) and the clamping portion of the second clamping member (1022) are arc-shaped contact surfaces.

6. The fixing device for the equalizing pipe according to claim 1, characterized in that, The mounting base (103) is provided with a connecting part (1031), which is used to be movably connected to the support frame (300).

7. The fixing device for the equalizing pipe according to claim 6, characterized in that, The connecting part (1031) is provided with an adjusting sliding hole for adjusting the position of the mounting base (103), and the support frame (300) is provided with a threaded hole that cooperates with the adjusting sliding hole so that the mounting base (103) is fixed on the support frame (300).

8. The fixing device for the equalizing pipe according to claim 1, characterized in that, The fixing member (102) is located between the mounting base (103) and the limiting part (1011) of the limiting member (101) so that the fixing member is fixed on the mounting base (103) and abuts against the limiting part (1011).

9. The fixing device for the equalizing pipe according to claim 1, characterized in that, The fastener (102) is provided with mounting holes (1024) for fixing the fastener (102) to the mounting base (103) by fasteners.

10. A transformer, characterized in that, include: Support frame (300); A voltage equalizing tube (200) is used to connect the winding and the bushing. The voltage equalizing tube (200) includes an aluminum tube, and a copper stranded wire for carrying current passes through the aluminum tube to realize the electrical connection between the winding and the bushing. A first insulating layer is provided on the outside of the aluminum tube. The first insulating layer has a conical structure. The small diameter end of the first insulating layer is located on the winding side, and the large diameter end of the first insulating layer is located on the bushing side. The fixing mechanism includes a fixing device and a clamp assembly (400). The fixing device is a fixing device for the equalizing pipe as described in any one of claims 1-9. The mounting base (103) is disposed on the support frame (300). The clamp assembly (400) is disposed on the support frame (300) for clamping the equalizing pipe (200). The clamp assembly (400) is arranged at a distance from the fixing device.

11. The transformer according to claim 10, characterized in that, The clamp assembly (400) includes a limiting component (401) and a clamp (402). The limiting component (401) is disposed on the outside of the equalizing pipe (200). The clamp (402) is detachably disposed on the support frame (300), and the clamp (402) clamps the limiting component (401) to fix the equalizing pipe (200).

12. The transformer according to claim 11, characterized in that, The limiting assembly (401) includes a limiting insulating cylinder (4012) and limiting rings (4011) disposed at both ends of the limiting insulating cylinder (4012). The limiting insulating cylinder (4012) is attached to the outside of the equalizing pipe (200). The clamp (402) is located between the limiting rings (4011) at both ends of the limiting insulating cylinder (4012) and the clamp (402) clamps the limiting insulating cylinder (4012). The limiting rings (4011) are used to prevent the clamp (402) from coming off.

13. The transformer according to claim 12, characterized in that, There are multiple limiting insulating cylinders (4012), and each limiting insulating cylinder (4012) is sequentially arranged on the outside of the equalizing pipe (200). A support member (4013) of the same height as the limiting insulating cylinder (4012) is provided between adjacent limiting insulating cylinders (4012). There are multiple support members (4013), and each support member (4013) is evenly distributed along the circumference of the limiting insulating cylinder (4012).

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