Insulating protective sleeve for outgoing line of transformer

Abstract

The utility model provides a transformer outgoing line insulation protective sleeve, which belongs to the technical field of protective sleeves, and comprises a main body sleeve, a fixed support, a sealing ring, an elastic pressing assembly and a guide assembly, the main body sleeve is of a cylindrical hollow structure, a plurality of guide ribs extending in the axial direction are arranged on the inner wall of the main body sleeve, and annular reinforcing ribs are arranged on the outer wall of the main body sleeve; the fixed support is fixedly arranged on the outer wall of the main body sleeve, the fixed support comprises a mounting plate and a connecting plate, the mounting plate is fixedly connected with the outer wall of the main body sleeve, and the connecting plate is vertically fixed on the mounting plate; one end of the main body sleeve is sleeved with the sealing ring, the sealing ring comprises an annular body and a sealing lip edge, the inner side of the annular body is in interference fit with the outer wall of the main body sleeve, and the sealing lip edge is bent inwards; the transformer outgoing line insulation protection device can solve the problem that in the prior art, a transformer outgoing line insulation protection device is poor in sealing performance.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of protective sleeve, more particularly to a transformer outgoing line insulation protective sleeve. BACKGROUND

[0002] With the continuous development of power system, the safe and stable operation of transformer as important power transmission and distribution equipment is paid more and more attention. The transformer outgoing line is an important part of the transformer, and its insulation protection is directly related to the safe operation of the transformer. At present, the common transformer outgoing line insulation protection device on the market mainly adopts a simple sheath structure, and this structure has many problems: first, the sealing structure is simple, and often only relies on a single sealing ring or sealing pad to realize sealing, which is easy to cause sealing failure in the long-term use process; secondly, there is no effective guide mechanism in the installation process, which makes the installation difficult and easy to damage the outgoing line; thirdly, the connection mode of the protective sleeve and the transformer is not reliable enough, and it is easy to loosen during operation; in addition, the existing protective device is mostly made of single material, and its service life is short in harsh environments such as high temperature and vibration. These problems seriously affect the safe operation and maintenance efficiency of the transformer, and it is urgent to develop an insulation protection device with better performance.

[0003] The transformer outgoing line insulation protection device in the prior art has the technical problems of poor sealing performance, inconvenient installation and short service life. UTILITY MODEL CONTENTS

[0004] Therefore, the utility model provides a transformer outgoing line insulation protective sleeve, which can solve the problem of poor sealing performance of the transformer outgoing line insulation protection device in the prior art.

[0005] The utility model is implemented as follows:

[0006] The utility model provides a transformer outgoing line insulation protection sleeve, wherein, including: main body sleeve, fixed bolster, sealing ring, elastic compression subassembly, guide component, the main body sleeve is hollow structure of cylindrical, and the inner wall of main body sleeve is equipped with a plurality of axial extension guide convex edge, is equipped with annular reinforcing rib on the outer wall of main body sleeve, the fixed bolster is fixedly arranged on the outer wall of main body sleeve, and the fixed bolster includes mounting plate and connecting plate, and the mounting plate is fixedly connected with the outer wall of main body sleeve, and the connecting plate is fixedly arranged on the mounting plate, the sealing ring is sleeved in one end of main body sleeve, and the sealing ring includes annular body and sealing lip, and the inner side of annular body is interference fit with the outer wall of main body sleeve, and the sealing lip is inwardly bent and arranged, the elastic compression subassembly is arranged in one end of main body sleeve away from sealing ring, and the elastic compression subassembly includes compression ring and elastic piece, and the compression ring is sleeved on main body sleeve and is slidingly connected with main body sleeve, and one end of elastic piece is fixedly connected with compression ring, and the other end is fixedly connected with main body sleeve, the guide component includes guide sleeve and limit ring, and the guide sleeve is fixedly arranged in the inside of main body sleeve, and the limit ring is fixedly arranged on the inner wall of guide sleeve.

[0007] The technical effect of the transformer outgoing line insulation protection sleeve is as follows: the plurality of axial extension guide convex edges arranged on the inner wall of the main body sleeve ensure the positioning accuracy of the outgoing line in the protection sleeve and prevent the outgoing line from shaking; the annular reinforcing rib enhances the structural strength of the main body sleeve; the sealing ring and the elastic compression subassembly realize double sealing and improve the sealing reliability; and the guide component makes the installation process of the outgoing line smoother and prevents the outgoing line from being damaged during the installation process.

[0008] On the basis of the above technical scheme, the transformer outgoing line insulation protection sleeve can be further improved as follows:

[0009] The main body sleeve is made of epoxy resin material, the inner wall of the main body sleeve is provided with four guide convex edges, and the four guide convex edges are evenly distributed along the circumference of the inner wall of the main body sleeve; and the annular reinforcing rib is provided with three rows, and the three rows of annular reinforcing ribs are arranged at intervals along the axial direction of the main body sleeve.

[0010] The main body sleeve is made of epoxy resin material, which has excellent insulation performance and mechanical strength; the even distribution of the four guide convex edges ensures that the outgoing line is uniformly stressed in the circumferential direction and improves the positioning accuracy; and the interval arrangement of the three rows of annular reinforcing ribs reduces the overall weight while ensuring the structural strength.

[0011] Further, the fixing support is made of metal material, a plurality of mounting holes are arranged on the connecting plate, and the mounting holes are arranged in a matrix; a reinforcing rib plate is arranged between the mounting plate and the outer wall of the main sleeve, and the two ends of the reinforcing rib plate are fixedly connected with the mounting plate and the main sleeve.

[0012] The fixing support made of metal material has high strength and rigidity, thereby ensuring stable installation; the mounting holes arranged in a matrix provide multiple mounting positions, thereby increasing installation flexibility; the reinforcing rib plate improves the structural strength of the connecting position of the mounting plate and the main sleeve, thereby preventing loosening after long-term use.

[0013] Further, the sealing ring is made of rubber material, a thickened portion is arranged at the end of the sealing lip, the cross section of the thickened portion is triangular, an annular groove is arranged on the outer wall of the annular body, and a metal reinforcing ring is arranged in the annular groove.

[0014] The sealing ring made of rubber material has good elasticity and sealing performance; the triangular thickened portion at the end of the sealing lip increases the contact area with the lead-out wire, thereby improving the sealing effect; the metal reinforcing ring prevents deformation of the sealing ring during use, thereby prolonging the service life.

[0015] Further, an annular groove is arranged on the inner wall of the compression ring, and a sealing ring is arranged in the annular groove; the elastic member is a wave spring, the wave spring is sleeved on the main sleeve, and the inner diameter of the wave spring is smaller than the inner diameter of the compression ring.

[0016] The annular groove on the inner wall of the compression ring and the sealing ring provide a second sealing barrier; the wave spring is used as the elastic member, which has a large deformation amount while ensuring the compression force, thereby adapting to the sealing requirements of lead-out wires of different specifications; the design that the inner diameter of the wave spring is smaller than the inner diameter of the compression ring ensures the pre-tightening force of the spring.

[0017] Further, a plurality of protrusions are arranged on the outer wall of the guide sleeve, the protrusions are matched with the guide protrusions on the inner wall of the main sleeve; the inner wall of the limiting ring is a tapered surface, and the small end of the tapered surface faces the end of the main sleeve.

[0018] The protrusions on the outer wall of the guide sleeve are matched with the guide protrusions on the inner wall of the main sleeve, thereby preventing the guide sleeve from rotating in the circumferential direction; the tapered surface design of the inner wall of the limiting ring facilitates the introduction of the lead-out wire, thereby reducing the installation resistance and simultaneously playing a dual role of guiding and limiting.

[0019] Further, the end of the main sleeve is provided with a chamfer, and the angle of the chamfer is 45 degrees; and the cross section of the annular reinforcing rib on the outer wall of the main sleeve is trapezoidal.

[0020] The beneficial effects of the above improvement scheme are that the 45-degree chamfer design of the end of the main sleeve avoids damage to the lead-out wire, and facilitates installation; the trapezoidal cross section design of the annular reinforcing rib enhances the structural strength while reducing the amount of material and the manufacturing cost.

[0021] Further, the outer wall of the compression ring is provided with anti-skid lines, and the anti-skid lines are annular and ladder-shaped; and the end of the compression ring is provided with a flange, and the flange is folded outward to form an annular step.

[0022] The beneficial effects of the above improvement scheme are that the annular ladder-shaped anti-skid lines on the outer wall of the compression ring improve the operating grip force, facilitating installation and adjustment; and the annular step formed by the flange provides a force point for operation, while preventing the compression ring from being pressed in too much.

[0023] Further, the length of the guide sleeve is 1 / 3 of the length of the main sleeve, and the guide sleeve is made of nylon material; and the thickness of the limiting ring gradually decreases along the axial direction.

[0024] The beneficial effects of the above improvement scheme are that the design of the guide sleeve with a length of 1 / 3 of the length of the main sleeve ensures the guiding effect while saving materials; the guide sleeve made of nylon material has self-lubricating properties, reducing friction with the lead-out wire; and the gradual change in the thickness of the limiting ring facilitates smooth passage of the lead-out wire.

[0025] Further, the cross section of the guide protrusion on the inner wall of the main sleeve is dovetail-shaped, and the guide protrusion is arranged through along the axial direction of the main sleeve; and the height of the annular reinforcing rib is 2 times the wall thickness of the main sleeve.

[0026] The beneficial effects of the above improvement scheme are that the dovetail-shaped cross section design of the guide protrusion increases the contact area with the guide sleeve, improving the positioning accuracy; and the design of the annular reinforcing rib with a height of 2 times the wall thickness of the main sleeve ensures the strength while avoiding the reinforcing rib being too large to affect the appearance.

[0027] Compared with the prior art, the transformer outgoing line insulation protection sleeve has the advantages that: the guide protrusions are arranged on the inner wall of the main sleeve, and the guide assembly is arranged, so that the outgoing line is accurately positioned and smoothly installed; the double sealing structure of the sealing ring and the elastic compression assembly significantly improves the sealing reliability; the structure of each component is reasonably designed, and appropriate materials are selected, so that the overall strength and service life are improved; the anti-slip design of the compression ring and the self-lubricating property of the guide sleeve improve the convenience of installation and maintenance; the arrangement of the annular reinforcing ribs and the reinforcing ribs improves the structural strength while realizing lightweight design; the optimized connection mode and size fit relationship between the components make the entire protection sleeve structure more compact and reliable, and effectively solve the problems in the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical scheme of the embodiment of the utility model, the following will be briefly introduced the drawings needed to be used in the description of the embodiment of the utility model, obviously, the drawings in the following description is only some embodiments of the utility model, for the ordinary skilled in the art, under the premise of not paying the creative labor, can also obtain other drawings according to these drawings.

[0029] Figure 1 It is an internal structure diagram of a transformer outgoing line insulation protection sleeve.

[0030] In the drawings, the component list represented by each sign is as follows:

[0031] 10, main sleeve; 11, guide protrusion; 12, annular reinforcing rib; 20, fixed support; 21, mounting plate; 22, connecting plate; 30, sealing ring; 31, annular body; 32, sealing lip; 321, thickened portion; 40, elastic compression assembly; 41, compression ring; 42, elastic member; 50, guide assembly; 51, guide sleeve; 52, limiting ring. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical scheme and advantages of the embodiment of the utility model more clear, the following will be combined with the drawings in the embodiment of the utility model, and the technical scheme in the embodiment of the utility model is clearly and completely described.

[0033] As Figure 1The image shows an embodiment of an insulating protective sleeve for transformer leads provided by this utility model. In this embodiment, it includes: a main sleeve 10, a fixing bracket 20, a sealing ring 30, an elastic clamping assembly 40, and a guide assembly 50. The main sleeve has a cylindrical hollow structure, with multiple axially extending guide ridges 11 on the inner wall and annular reinforcing ribs 12 on the outer wall. The fixing bracket is fixedly mounted on the outer wall of the main sleeve, and includes a mounting plate 21 and a connecting plate 22. The mounting plate is fixedly connected to the outer wall of the main sleeve, and the connecting plate is vertically fixed on the mounting plate. The sealing ring is fitted with... At one end of the main sleeve, the sealing ring includes an annular body 31 and a sealing lip 32. The inner side of the annular body is interference-fitted with the outer wall of the main sleeve, and the sealing lip is bent inward. The elastic pressing assembly is located at the end of the main sleeve away from the sealing ring. The elastic pressing assembly includes a pressing ring 41 and an elastic element 42. The pressing ring is sleeved on the main sleeve and slides with the main sleeve. One end of the elastic element is fixedly connected to the pressing ring, and the other end is fixedly connected to the main sleeve. The guide assembly includes a guide sleeve 51 and a limiting ring 52. The guide sleeve is fixedly located inside the main sleeve, and the limiting ring is fixedly located on the inner wall of the guide sleeve.

[0034] In the above technical solution, the main sleeve is made of epoxy resin material, and four guide ridges are provided on the inner wall of the main sleeve. The four guide ridges are evenly distributed along the circumference of the inner wall of the main sleeve. Three annular reinforcing ribs are provided, and the three annular reinforcing ribs are spaced apart along the axial direction of the main sleeve.

[0035] Furthermore, in the above technical solution, the fixed bracket is made of metal material, and the connecting plate has multiple mounting holes arranged in a matrix; a reinforcing rib is provided between the mounting plate and the outer wall of the main sleeve, and the two ends of the reinforcing rib are fixedly connected to the mounting plate and the main sleeve respectively.

[0036] Furthermore, in the above technical solution, the sealing ring is made of rubber material, and the end of the sealing lip is provided with a thickened part 321, the cross-section of which is triangular; the outer wall of the annular body is provided with an annular groove, and a metal reinforcing ring is provided in the annular groove.

[0037] Furthermore, in the above technical solution, an annular groove is provided on the inner wall of the clamping ring, and a sealing ring is provided in the annular groove; the elastic element is a wave spring, which is sleeved on the main sleeve, and the inner diameter of the wave spring is smaller than the inner diameter of the clamping ring.

[0038] Furthermore, in the above technical solution, the outer wall of the guide sleeve is provided with multiple protrusions, which cooperate with the guide protrusions on the inner wall of the main sleeve; the inner wall of the limiting ring is a conical surface, with the small end of the conical surface facing the end of the main sleeve.

[0039] Further, in the above technical solution, the end of the main sleeve is provided with a chamfer, and the angle of the chamfer is 45 degrees; the cross section of the annular reinforcing rib on the outer wall of the main sleeve is trapezoidal.

[0040] Further, in the above technical solution, the outer wall of the compression ring is provided with anti-skid lines, and the anti-skid lines are annular and stepped; the end of the compression ring is provided with a flange, and the flange is outwardly folded to form an annular step.

[0041] Further, in the above technical solution, the length of the guide sleeve is 1 / 3 of the length of the main sleeve, and the guide sleeve is made of nylon material; the thickness of the limiting ring gradually decreases along the axial direction.

[0042] Further, in the above technical solution, the cross section of the guide protrusion on the inner wall of the main sleeve is dovetail-shaped, and the guide protrusion is arranged through along the axial direction of the main sleeve; the height of the annular reinforcing rib is 2 times of the wall thickness of the main sleeve.

[0043] Firstly, the fixed support is fixed on the transformer shell through the mounting hole to ensure firm installation; then, one end of the main sleeve is inserted into the connecting plate of the fixed support, and the connection is strengthened through the reinforcing rib plate; then, the sealing ring is sleeved on one end of the main sleeve, and the sealing lip is directed to the direction of the lead-out wire; the guide assembly is installed inside the main sleeve to ensure that the protrusion of the guide sleeve correctly cooperates with the guide protrusion of the main sleeve; then, the wave spring of the elastic compression assembly is sleeved on the main sleeve, and the compression ring is sleeved on the other end of the main sleeve; when the lead-out wire is installed, the lead-out wire is first inserted from the end of the compression ring, and the lead-out wire smoothly passes through the main sleeve through the taper surface of the limiting ring and the guidance of the guide sleeve; finally, the position of the compression ring is adjusted, and the elastic force of the wave spring is used to realize the sealing compression of the lead-out wire. During use, the sealing condition and the fastening condition of each connection part are regularly checked, and the easily damaged parts such as the sealing ring are replaced when necessary.

[0044] A specific embodiment of the utility model is provided below:

[0045] The transformer lead insulation protective sleeve of the embodiment adopts the following specific structure: the main sleeve is made of epoxy resin material, with a total length of 300 mm, an inner diameter of 60 mm, and a wall thickness of 5 mm; 4 guide ribs are evenly arranged on the inner wall of the main sleeve, the guide ribs adopt dovetail cross sections, the rib height is 3 mm, the bottom width is 4 mm, and the top width is 2 mm; 3 annular reinforcing ribs are arranged on the outer wall of the main sleeve, the reinforcing ribs adopt trapezoidal cross sections, the height is 10 mm, the upper base width is 3 mm, the lower base width is 6 mm, and the spacing between the 3 reinforcing ribs is 80 mm. The fixing support is made of aluminum alloy material, the mounting plate thickness is 8 mm, the connecting plate thickness is 10 mm, 9 mounting holes with a diameter of 12 mm are arranged on the mounting plate, and are distributed in a 3x3 matrix; the reinforcing rib plate is made of a steel plate with a thickness of 6 mm, and is connected with the mounting plate and the main sleeve by welding. The sealing ring is made of nitrile rubber, the annular body thickness is 8 mm, the sealing lip length is 15 mm, the end thickening part cross section is an isosceles triangle, the triangle base length is 4 mm, and the height is 3 mm; the metal reinforcing ring arranged in the annular groove is made of stainless steel material, with a cross section diameter of 2 mm. The compression ring in the elastic compression assembly is made of engineering plastic, the annular groove on the inner wall has a depth of 3 mm and a width of 4 mm, and the sealing ring is made of fluororubber material; the wave spring is made of 304 stainless steel material, with 6 waves, and a pre-compression amount of 5 mm. The guide sleeve is made of PA66 nylon material, with a length of 100 mm, 4 bumps are arranged on the outer wall to cooperate with the guide ribs, and the bumps adopt dovetail groove structure; the limiting ring is made of POM material, the taper angle of the conical surface is 30 degrees, and the thickness gradually decreases from 4 mm to 2 mm. The chamfer at both ends of the main sleeve adopts a 45-degree angle, and the chamfer width is 2 mm; the anti-slip lines on the outer wall of the compression ring adopt a three-layer stepped structure, each layer has a step height of 1 mm, and the annular step width of the turn-up is 5 mm. The surfaces of all metal parts are subjected to corrosion prevention treatment, and the plastic parts are made of flame-retardant grade material. The protective sleeve of the embodiment is suitable for transformer lead insulation protection with a rated voltage of 35 kV and below, has excellent insulation performance, sealing performance and mechanical strength, is convenient to install and maintain, and has a long service life.

[0046] Specifically, the principle of the utility model is: the utility model adopts multiple structure design principle, forms accurate guide channel through cooperation of the guide convex rib of the inner wall of the main body sleeve and the guide assembly, ensures that the outgoing line always keeps correct position and direction in the installation process; the sealing lip of the sealing ring and the sealing ring of the compression ring constitute double sealing system, reliable sealing barrier is formed in different positions by using different sealing structures and material characteristics; the elastic deformation characteristics of the wave spring provide continuous stable compression force, ensure the durability of the sealing effect; through reasonable structure design and material selection, the strength and durability of each component are ensured, and the light weight of the overall structure is realized; through optimized connection mode and size relationship, the cooperation accuracy and assembly reliability between each component are ensured.

[0047] The above is only a specific embodiment of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the art can easily think of changes or replacements within the technical range disclosed by the utility model, which should be covered in the protection scope of the utility model. Therefore, the protection scope of the utility model should be subject to the protection scope of the claims.

Claims

1. A protective cover for the insulation of a transformer lead, characterized in that, The utility model provides a sealing device for the pipe, which comprises a main sleeve, a fixing support, a sealing ring, an elastic compression assembly and a guide assembly. The main sleeve is made of epoxy resin material, and four guide protrusions are arranged on the inner wall of the main sleeve and evenly distributed circumferentially along the inner wall of the main sleeve.

2. A protective cover for transformer lead insulation as defined in claim 1, wherein, The fixing support is made of metal material, a plurality of mounting holes are formed in the connecting plate, and the mounting holes are arranged in a matrix.

3. A protective cover for transformer lead insulation as defined in claim 2, wherein, The sealing ring is made of rubber material, and the end of the sealing lip is provided with a thickened part, and the cross section of the thickened part is triangular.

4. A protective cover for transformer lead insulation as defined in claim 3, wherein, The inner wall of the compression ring is provided with an annular groove, and a metal reinforcing ring is arranged in the annular groove.

5. A protective cover for transformer lead insulation as defined in claim 4, wherein, The inner wall of the compression ring is provided with an annular groove, and a metal reinforcing ring is arranged in the annular groove.

6. A protective cover for transformer lead insulation as defined in claim 5, wherein, The outer wall of the guide sleeve is provided with a plurality of protrusions, and the protrusions are matched with the guide protrusions on the inner wall of the main sleeve.

7. A protective cover for transformer lead insulation as defined in claim 6, wherein, The end of the main sleeve is provided with a chamfer, and the angle of the chamfer is 45 degrees.

8. A protective cover for transformer lead insulation as defined in claim 7, wherein, The outer wall of the main sleeve is provided with an annular reinforcing rib, and the cross section of the annular reinforcing rib is trapezoidal.

9. A protective cover for transformer lead insulation as defined in claim 8, wherein, The outer wall of the compression ring is provided with an anti-skid pattern, the anti-skid pattern is annular and stepped, the end of the compression ring is provided with a turned edge, and the turned edge is outwardly folded to form an annular step.

10. A protective cover for transformer lead insulation as defined in claim 9, wherein, The length of the guide sleeve is 1 / 3 of the length of the main sleeve, and the guide sleeve is made of nylon material. The guide protrusions on the inner wall of the main sleeve are dovetail-shaped in cross section, and the guide protrusions are arranged through along the axial direction of the main sleeve. The height of the annular reinforcing rib is 2 times the wall thickness of the main sleeve.

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