Integrated insulating sleeve for transformer

Abstract

The utility model belongs to the technical field of power equipment, and particularly relates to an integrated insulating sleeve for a transformer, which comprises a sleeve body, the sleeve body is mounted above a base, a through hole is formed in the middle of the sleeve in a penetrating manner, a guide rod is mounted in the through hole, a wiring terminal is arranged at the top of the guide rod, and the bottom of the guide rod is connected with a lead in the transformer; the exhaust assembly is arranged at the top of the sleeve and arranged on the guide rod in a sleeving mode, the exhaust assembly comprises a shell, a filtering part and a telescopic structure, the shell is arranged at the top of the sleeve and communicates with the through hole, the filtering part is arranged in the shell and used for separating air from oil gas, and the telescopic structure is arranged on the outer wall of the shell and used for connecting the shell with the guide rod. The vent holes are opened and closed; an exhaust hole is formed in the side wall of the shell. And discharged air can be filtered through the arranged filtering part, oil of the transformer is prevented from dripping on the surface of the sleeve, and the service life of the transformer is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric power equipment, and in particular relates to an integrated insulating bushing for a transformer. Background Art

[0002] The transformer bushing is the main insulating device outside the transformer box. The lead wires of the transformer winding must pass through the insulating bushing to insulate the lead wires from each other and from the transformer casing, and it also serves to fix the lead wires.

[0003] Chinese utility model patent CN214377976U discloses a transformer insulating bushing, including a bushing installed on a transformer oil tank, a lead wire passing through the bushing, and the lead wire is connected to a terminal at the top of the bushing; an air venting hood is provided on the bushing through a gland, and an air venting bolt is provided on the air venting hood; an automatic exhaust valve is provided below the air venting hood; the automatic exhaust valve includes an exhaust groove buried on the inner wall of the bushing and changing from narrow to wide, an exhaust hole connected to the outer wall of the bushing is opened on the side wall of the exhaust groove, a sealing ball with a diameter larger than the diameter of the narrow end of the exhaust groove is provided in the exhaust groove, and a supporting spring is provided between the sealing ball and the inner wall of the bushing in the exhaust groove.

[0004] However, when the sealing ball is separated from the exhaust groove, the air in the bushing passes through the exhaust groove, the exhaust hole, and the vent hole in turn, and then is discharged from the bushing. However, the air contains oil and gas. When the air is discharged, it is easy to cause the oil in the transformer to drip from the vent hole to the surface of the bushing, making it easy for a large amount of dust and dirt to accumulate on the surface of the bushing. On rainy days, the insulation strength of the bushing surface will be reduced, and flashover accidents are prone to occur. Utility Model Content

[0005] The purpose of the utility model is to provide an integrated insulating bushing for a transformer in view of the above-mentioned technical problems, so as to solve the problems raised in the background technology.

[0006] In view of this, the utility model provides an integrated insulating bushing for a transformer, comprising:

[0007] A bushing, the bushing is installed above the base, and a through hole is provided in the middle of the bushing, a guide rod is installed in the through hole, a wiring terminal is provided on the top of the guide rod, and the bottom is connected to the lead wire in the transformer;

[0008] Also includes:

[0009] An exhaust assembly is arranged at the top of the sleeve and sleeved on the guide rod, and the exhaust assembly includes:

[0010] A shell, which is arranged on the top of the sleeve and is connected to the perforation,

[0011] A filter unit is provided in the housing to separate air from oil and gas.

[0012] A telescopic structure, which is arranged on the outer wall of the shell and is used to open and close the exhaust hole;

[0013] Wherein, the side wall of the shell is provided with an exhaust hole, and a locking nut is threadedly arranged on the guide rod, and the locking nut is in contact with the top of the shell.

[0014] In this technical solution, the air pressure in the bushing increases, and the air in the bushing carries the oil and gas into the housing. After being filtered by the filter unit, the air and the oil and gas are separated, and the separated air can push the telescopic structure to open the exhaust hole, so that the excess air is discharged from the bushing. The filter unit can filter the exhausted air to prevent the oil of the transformer from dripping on the surface of the bushing, which is beneficial to prolonging the service life of the transformer.

[0015] In the above technical solution, further, the filter unit includes:

[0016] A vertical pipe, which is arranged inside the shell and is penetrated by the guide rod;

[0017] Mounting parts, which are evenly distributed in the circumferential direction inside the shell and are arranged in a T-shape;

[0018] The orifice plates are symmetrically arranged in the shell up and down, and a filter element is arranged between the two orifice plates.

[0019] In this technical solution, air enters the shell from between the guide rod and the vertical pipe, and the air passes through the cooperation between the orifice plate and the filter element, so that the oil and gas remain in the filter element, and the air is discharged from the sleeve from the exhaust hole, and a hole that can pass through the mounting piece is provided on the orifice plate below.

[0020] In the above technical solution, further, the telescopic structure includes:

[0021] A fixing block, the fixing block is fixedly arranged on the outer wall of the shell, and a groove is formed on the bottom surface of the fixing block, and the groove is communicated with the exhaust hole;

[0022] A blocking block is movably arranged in the groove, and a spring is arranged between the blocking block and the inner wall of the groove.

[0023] In this technical solution, the air pressure in the shell increases, thereby pushing the blocking block to separate from the exhaust hole, so that the air is discharged from the exhaust sleeve. After the air in the sleeve is discharged, the spring pushes the blocking block to block the exhaust hole again.

[0024] In the above technical solution, further, an oil return hole is circumferentially provided through the bottom of the vertical pipe.

[0025] In the technical solution, after the filter element absorbs more oil and gas, the oil and gas on the filter element aggregate into liquid, and through the cooperation between the set orifice plate and the oil return hole, the liquid oil flows back into the casing.

[0026] In the above technical solution, further, the inner bottom surface of the shell is inclined toward the oil return hole.

[0027] In the technical solution, the efficiency of the liquid oil flowing back into the sleeve can be accelerated by the inclined bottom surface of the shell.

[0028] In the above technical solution, further, a cover body is detachably provided on the top of the shell, and a first sealing ring is provided between the cover body and the shell.

[0029] In the technical solution, the detachable cover body can facilitate maintenance personnel to maintain or replace components in the shell, and the first sealing ring can improve the sealing between the cover body and the shell.

[0030] In the above technical solution, further, a fixing sleeve is fixedly provided below the shell, the fixing sleeve is provided on the top of the sleeve, and a second sealing ring is provided between the fixing sleeve and the top surface of the sleeve.

[0031] In the present technical solution, by tightening the locking nut, the sealing between the housing and the sleeve body can be improved through the cooperation between the provided fixing sleeve and the second sealing ring.

[0032] In the above technical solution, further, a limiting groove is arranged in the circumferential direction of the overlapping side of the top of the sleeve and the fixing sleeve, and a depression is arranged on the fixing sleeve in a corresponding manner.

[0033] In the present technical solution, the cooperation between the recess and the limiting groove can avoid twisting between the shell and the sleeve, which is beneficial to improving the stability of the device.

[0034] In the above technical solution, further, the front end of the blocking block is made of rubber material.

[0035] In the technical solution, the sealing performance of the vent hole can be improved by using a rubber blocking block, thereby preventing oil and gas from overflowing from the vent hole during operation.

[0036] The beneficial effects of the utility model are:

[0037] 1. The air pressure in the bushing increases, and the air in the bushing carries the oil and gas into the housing. After being filtered by the filter unit, the air and the oil and gas are separated, and the separated air can push the telescopic structure to open the exhaust hole, so that the excess air is discharged from the bushing. The filter unit can filter the exhausted air to prevent the transformer oil from dripping on the bushing surface, which is beneficial to prolonging the service life of the transformer. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a three-dimensional schematic diagram of the utility model;

[0039] Figure 2 It is a cross-sectional view of the utility model;

[0040] Figure 3 It is an exploded view of the utility model;

[0041] Figure 4 This utility model Figure 2 A magnified image of the middle A area;

[0042] Figure 5 This utility model Figure 3 Enlarged view of area B;

[0043] Figure 6 It is a cross-sectional view of the shell of the utility model;

[0044] The symbols in the figure are:

[0045] 1. Base; 2. Sleeve; 3. Perforation; 4. Guide rod; 5. Terminal block; 6. Exhaust assembly; 601. Shell; 602. Exhaust hole; 7. Filter unit; 701. Vertical pipe; 702. Mounting piece; 703. Orifice plate; 704. Filter element; 8. Telescopic structure; 801. Fixing block; 802. Groove; 803. Blocking block; 804. Spring; 9. Locking nut; 10. Oil return hole; 11. Cover; 12. First sealing ring; 13. Fixing sleeve; 14. Second sealing ring; 15. Limiting groove; 16. Depression; 17. Fixing piece. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0047] In the description of the present application, it should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. For ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0048] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0049] It should be noted that, in the description of the present application, the orientation or positional relationship indicated by terms such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise stated, these orientation words do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present application; the orientation words "inside and outside" refer to the inside and outside relative to the contour of each component itself.

[0050] It should be noted that, in the present application, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises one..." does not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be noted that the scope of the method and device in the embodiment of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0051] Embodiment 1:

[0052] Depend on Figure 1-Figure 5 As shown, this embodiment provides an integrated insulating bushing for a transformer, including: a bushing 2, which is installed above a base 1, and a through hole 3 is provided in the middle of the bushing 2, a guide rod 4 is installed in the through hole 3, a terminal 5 is provided on the top of the guide rod 4, and the bottom is connected to the lead in the transformer; it also includes: an exhaust component 6, which is arranged on the top of the bushing 2 and sleeved on the guide rod 4, and the exhaust component 6 includes: a shell 601, which is arranged on the top of the bushing 2, and the shell 601 is connected with the through hole 3, a filter part 7, which is arranged in the shell 601 to separate air and oil gas, and a telescopic structure 8, which is arranged on the outer wall of the shell 601 and is used to open and close the exhaust hole 602; wherein, the exhaust hole 602 is opened on the side wall of the shell 601, and a locking nut 9 is threadedly provided on the guide rod 4, and the locking nut 9 abuts against the top of the shell 601.

[0053] The air pressure in the bushing 2 increases, and the air in the bushing 2 carries the oil and gas into the housing 601, and is filtered by the filter 7 to separate the air from the oil and gas. The separated air can push the telescopic structure 8 to open the exhaust hole 602, so that the excess air is discharged from the bushing 2. The filter 7 can filter the exhausted air to prevent the oil of the transformer from dripping on the surface of the bushing 2, which is beneficial to prolonging the service life of the transformer. The bushing 2 is mounted on the base 1 through the fixing member 17.

[0054] Furthermore, the filter unit 7 includes: a vertical pipe 701, which is arranged inside the shell 601 and is passed through by the guide rod 4; a mounting member 702, which is evenly distributed circumferentially inside the shell 601 and is T-shaped; a perforated plate 703, which is symmetrically arranged in the shell 601 up and down, and a filter element 704 is arranged between the two perforated plates 703.

[0055] Air enters the housing 601 from between the guide rod 4 and the vertical pipe 701, and the air passes through the cooperation between the orifice plate 703 and the filter element 704, so that the oil and gas remain in the filter element 704, and the air is discharged from the sleeve 2 from the exhaust hole 602, and the orifice plate 703 below is provided with a hole that can pass through the mounting member 702.

[0056] Furthermore, the telescopic structure 8 includes: a fixed block 801, which is fixedly arranged on the outer wall of the shell 601, and a groove 802 is opened on the bottom surface of the fixed block 801, and the groove 802 is connected to the exhaust hole 602; a blocking block 803, which is movably arranged in the groove 802, and a spring 804 is arranged between the blocking block 803 and the inner wall of the groove 802.

[0057] The air pressure in the housing 601 increases, thereby pushing the blocking block 803 to separate from the exhaust hole 602, so that the air is discharged from the sleeve 2 from the exhaust. After the air in the sleeve 2 is discharged, the spring 804 pushes the blocking block 803 to block the exhaust hole 602 again.

[0058] Embodiment 2:

[0059] Depend on Figure 1-Figure 6 As shown, this embodiment provides an integrated insulating bushing for a transformer, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0060] Furthermore, an oil return hole 10 is circumferentially provided through the bottom of the vertical pipe 701 .

[0061] After the filter element 704 absorbs a large amount of oil and gas, the oil and gas on the filter element 704 aggregate into liquid, and through the cooperation between the orifice plate 703 and the oil return hole 10, the liquid oil flows back into the sleeve 2.

[0062] Furthermore, the inner bottom surface of the housing 601 is inclined toward the oil return hole 10 .

[0063] The efficiency of the liquid oil flowing back into the sleeve 2 can be accelerated by the inclined bottom surface of the housing 601 .

[0064] Furthermore, a cover body 11 is detachably provided on the top of the shell 601, and a first sealing ring 12 is provided between the cover body 11 and the shell 601.

[0065] The detachable cover 11 can facilitate maintenance personnel to maintain or replace components in the housing 601 , and the first sealing ring 12 can improve the sealing between the cover 11 and the housing 601 .

[0066] Furthermore, a fixing sleeve 13 is fixedly disposed below the housing 601 . The fixing sleeve 13 is sleeved on the top of the sleeve 2 , and a second sealing ring 14 is disposed between the fixing sleeve 13 and the top surface of the sleeve 2 .

[0067] By tightening the locking nut 9 , the sealing performance between the housing 601 and the main body of the sleeve 2 can be improved through the cooperation between the fixed sleeve 13 and the second sealing ring 14 .

[0068] Furthermore, a limiting groove 15 is circumferentially arranged on the top of the sleeve 2 and the overlapping side of the fixing sleeve 13 , and a depression 16 is arranged on the fixing sleeve 13 in a corresponding manner.

[0069] The cooperation between the recess 16 and the limiting groove 15 can avoid twisting between the housing 601 and the sleeve 2, which is beneficial to improving the stability of the device.

[0070] Furthermore, the front end of the blocking block 803 is made of rubber.

[0071] The rubber blocking block 803 can improve the sealing performance of the air outlet, thereby preventing oil and gas from overflowing from the air outlet 602 during operation.

[0072] The embodiments of the present application are described above in conjunction with the accompanying drawings. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. An integrated insulating bushing for a transformer, characterized in that ,include: A bushing (2), the bushing (2) being installed above the base (1), and a through hole (3) being provided through the middle of the bushing (2), a guide rod (4) being installed in the through hole (3), a wiring terminal (5) being provided at the top of the guide rod (4), and the bottom of the guide rod (4) being connected to a lead wire in a transformer; It is characterized by further comprising: An exhaust assembly (6), the exhaust assembly (6) being arranged on the top of the sleeve (2) and sleeved on the guide rod (4), the exhaust assembly (6) comprising: A shell (601), wherein the shell (601) is disposed on the top of the sleeve (2), and the shell (601) is connected to the through hole (3), A filter unit (7), wherein the filter unit (7) is arranged in the housing (601) and is used to separate air and oil gas. A telescopic structure (8), wherein the telescopic structure (8) is arranged on the outer wall of the shell (601) and is used to open and close the exhaust hole (602); The side wall of the shell (601) is provided with an exhaust hole (602), and a locking nut (9) is threadedly provided on the guide rod (4), and the locking nut (9) is in contact with the top of the shell (601).

2. The integrated insulating bushing for transformer according to claim 1, characterized in that: The filter unit (7) comprises: A vertical pipe (701), wherein the vertical pipe (701) is arranged inside the housing (601) and is penetrated by the guide rod (4); Mounting members (702), the mounting members (702) are evenly distributed in the circumferential direction inside the housing (601) and are arranged in a T-shape; The orifice plates (703) are symmetrically arranged in the housing (601) up and down, and a filter element (704) is arranged between the two orifice plates (703).

3. The integrated insulating bushing for transformer according to claim 1, characterized in that: The telescopic structure (8) comprises: A fixing block (801), the fixing block (801) being fixedly arranged on the outer wall of the shell (601), and a groove (802) is provided on the bottom surface of the fixing block (801), and the groove (802) is communicated with the exhaust hole (602); A blocking block (803) is movably disposed in the groove (802), and a spring (804) is disposed between the blocking block (803) and the inner wall of the groove (802).

4. The integrated insulating bushing for transformer according to claim 2, characterized in that: An oil return hole (10) is provided circumferentially through the bottom of the vertical pipe (701).

5. The integrated insulating bushing for transformer according to claim 4, characterized in that: The inner bottom surface of the housing (601) is arranged to be inclined toward the oil return hole (10).

6. The integrated insulating bushing for transformer according to claim 1, characterized in that: A cover body (11) is detachably provided above the housing (601), and a first sealing ring (12) is provided between the cover body (11) and the housing (601).

7. The integrated insulating bushing for transformer according to claim 1, characterized in that: A fixing sleeve (13) is fixedly arranged below the housing (601), and the fixing sleeve (13) is sleeved on the top of the sleeve (2), and a second sealing ring (14) is arranged between the fixing sleeve (13) and the top surface of the sleeve (2).

8. The integrated insulating bushing for transformer according to claim 7, characterized in that: A limiting groove (15) is arranged in the circumferential direction of the overlapping side of the top of the sleeve (2) and the fixing sleeve (13), and a depression (16) is arranged on the fixing sleeve (13) in a corresponding manner.

9. The integrated insulating bushing for transformer according to claim 3, characterized in that: The front end of the blocking block (803) is made of rubber.

Images