Sleeve structure

Abstract

The utility model belongs to the technical field of transformers, and particularly relates to a sleeve structure which comprises an insulating sleeve and insulating bowls, the insulating bowls are arranged on the surface of the insulating sleeve at equal intervals, the insulating sleeve and the insulating bowls are of an integrally formed structure, a core rod is movably inserted in an inner cavity of the insulating sleeve, external threads are arranged on the surfaces of the two ends of the core rod, and the outer threads are matched with the external threads. The top surface of the core rod is fixedly connected with a limiting disc, the upper surface of the limiting disc abuts against the top surface of an inner cavity of the insulating pipe sleeve, the top of the core rod is in threaded connection with a first locking nut through an external thread, and the top surface of the core rod is fixedly connected with the limiting disc. The surface of the core rod is sleeved with the reinforcing sleeve, the inner wall of the reinforcing sleeve is tightly attached to the surface of the outer wall of the core rod, the top of the reinforcing sleeve abuts against the lower surface of the limiting disc through the connecting disc, the reinforcing sleeve and the core rod can form an integrated structure, and by changing the diameter of the core rod, the conductive efficiency of the core rod is improved, and the universality of the insulating sleeve is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of transformers, in particular to a bushing structure. 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 and the lead wires from the transformer casing. It also serves to fix the lead wires. Due to different voltage levels, the insulating bushings are available in pure porcelain bushings, oil-filled bushings, and capacitor bushings. Pure porcelain bushings are mostly used for transformers of 10kV and below. It is a conductive copper rod inserted into the porcelain bushing. The inside of the porcelain bushing is air-insulated, which can prevent the current from being transferred to the transformer casing and improve the safety of the transformer when in use.

[0003] The inner cavity of the existing transformer bushing is conductive through a core rod. The diameters of the core rods of different types of bushings are also different. The bushing is specific. The corresponding bushing is selected according to the power of the transformer. The transformer models in the area under the jurisdiction of the power workers are also various. Therefore, when maintaining the transformer, it is necessary to carry multiple types of bushings, which is very inconvenient to use. In order to solve the above problems, a bushing structure is proposed in the present application. Utility Model Content

[0004] (I) Purpose of the utility model

[0005] In order to solve the technical problems existing in the background technology, the utility model proposes a sleeve structure, in which the reinforcing sleeve is sleeved on the surface of the core rod, and the inner wall of the reinforcing sleeve is tightly fitted with the outer wall surface of the core rod, and the top of the reinforcing sleeve is abutted against the lower surface of the limit plate through the connecting plate, so that the reinforcing sleeve and the core rod form an integral structure, and by changing the diameter of the core rod, the conductive efficiency of the core rod is improved, and the versatility of the insulating sleeve is improved, so as to solve the problems raised in the background technology.

[0006] (II) Technical solution

[0007] In order to solve the above technical problems, the utility model provides a sleeve structure, including an insulating sleeve and an insulating bowl, wherein the insulating bowl is equidistantly arranged on the surface of the insulating sleeve, the insulating sleeve and the insulating bowl are an integrally formed structure, a core rod is movably inserted into the inner cavity of the insulating sleeve, and the surfaces of both ends of the core rod are provided with external threads;

[0008] The top surface of the core rod is fixedly connected to a limit plate, the upper surface of the limit plate abuts against the top surface of the inner cavity of the insulating sleeve, and the top of the core rod is threadedly connected to a No. 1 locking nut through an external thread;

[0009] A reinforcing sleeve is movably sleeved on the surface of the core rod. The inner wall of the reinforcing sleeve is closely attached to the outer wall surface of the core rod. A connecting plate is integrally formed at the top of the reinforcing sleeve, and the connecting plate abuts against the lower surface of the limiting plate.

[0010] Preferably, a connecting clamp is movably connected to the top of the core rod. A sleeve is integrally formed at the bottom of the connecting clamp, and the connecting clamp is connected to the external thread at the top of the core rod through the sleeve.

[0011] Preferably, a plurality of groups of first locking nuts are provided. The lower group of first locking nuts abuts against the top surface of the insulating tube sleeve, and the upper group of first locking nuts abuts against the bottom of the sleeve of the connecting clamp.

[0012] Preferably, a conical limiting seat is movably inserted at the bottom of the insulating tube sleeve. A plugging hole is penetrated through the center of the conical limiting seat, and the reinforcing sleeve is inserted into the plugging hole.

[0013] Preferably, a top plate is movably provided on the bottom surface of the conical limiting seat, and the upper surface of the top plate abuts against the lower surface of the conical limiting seat.

[0014] Preferably, a second locking nut is threadedly connected to the bottom of the core rod through an external thread, and the second locking nut abuts against the lower surface of the top plate.

[0015] Preferably, a fixing plate is fixedly connected to the bottom surface of the insulating tube sleeve, and a rubber pad is movably provided on the lower surface of the fixing plate.

[0016] The above technical solutions of the present utility model have the following beneficial technical effects:

[0017] 1. In the present utility model, the reinforcing sleeve is sleeved on the surface of the core rod, and the inner wall of the reinforcing sleeve is closely attached to the outer wall surface of the core rod. The top of the reinforcing sleeve abuts against the lower surface of the limiting plate through the connecting plate, so that the reinforcing sleeve and the core rod can form an integral structure. By changing the diameter of the core rod, the conductive efficiency of the core rod can be improved, and the versatility of the insulating tube sleeve can be improved.

[0018] 2. In the present utility model, the conical limiting seat is inserted into the bottom of the reinforcing sleeve. By rotating the second locking nut, the second locking nut will push the top plate under the action of the thread to apply an upward thrust to the conical limiting seat, and the bottom of the reinforcing sleeve can be limited through the conical limiting seat, which is convenient for disassembling and assembling the reinforcing sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is the overall structural schematic diagram of a sleeve structure of the present utility model;

[0020] Figure 2 is the sectional structural schematic diagram of a sleeve structure of the present utility model;

[0021] Figure 3 Schematic diagram of the insulating tube sleeve structure of a sleeve structure of the present utility model;

[0022] Figure 4 Schematic diagram of the core rod installation structure of a sleeve structure of the present utility model.

[0023] Reference numerals:

[0024] 1. Insulating tube sleeve; 2. Insulating bowl; 3. Core rod; 4. External thread; 5. Limit disk; 6. First locking nut; 7. Connecting fixture; 8. Reinforcing sleeve; 9. Connecting disk; 10. Conical limit seat; 11. Top disk; 12. Second locking nut; 13. Fixed disk; 14. Rubber pad. Specific embodiments

[0025] In order to make the purpose, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are exemplary and are not intended to limit the scope of the present utility model. In addition, in the following description, the descriptions of well-known structures and technologies are omitted to avoid unnecessarily confusing the concepts of the present utility model.

[0026] As Figures 1-4 shown, a sleeve structure proposed by the present utility model includes an insulating tube sleeve 1 and an insulating bowl 2. The insulating bowls 2 are equidistantly arranged on the surface of the insulating tube sleeve 1. The insulating tube sleeve 1 and the insulating bowl 2 are of an integrally formed structure. A core rod 3 is movably inserted into the inner cavity of the insulating tube sleeve 1. External threads 4 are provided on the surfaces of both ends of the core rod 3;

[0027] A limit disk 5 is fixedly connected to the top surface of the core rod 3. The upper surface of the limit disk 5 abuts against the top surface of the inner cavity of the insulating tube sleeve 1. The top of the core rod 3 is threadedly connected with a first locking nut 6 through the external thread 4;

[0028] A reinforcing sleeve 8 is movably sleeved on the surface of the core rod 3. The inner wall of the reinforcing sleeve 8 is closely attached to the outer wall surface of the core rod 3. A connecting disk 9 is integrally formed at the top of the reinforcing sleeve 8. The connecting disk 9 abuts against the lower surface of the limit disk 5.

[0029] It should be noted that the insulating tube sleeve 1 and the insulating bowl 2 are insulating, which can prevent current from being transmitted to the transformer housing, improve the safety of the transformer during use, and strengthen the sleeve 8 is sleeved on the surface of the core rod 3, and the inner wall of the strengthening sleeve 8 is closely attached to the outer wall surface of the core rod 3. The top of the strengthening sleeve 8 is abutted against the lower surface of the limiting disk 5 through the connecting disk 9, so that the strengthening sleeve 8 and the core rod 3 form an integral structure. The conical limiting seat 10 is inserted into the bottom of the strengthening sleeve 8. By rotating the second locking nut 12, the second locking nut 12 will push the top disk 11 under the action of the thread to apply an upward thrust to the conical limiting seat 10, and the bottom of the strengthening sleeve 8 can be limited through the conical limiting seat 10, improving the stability of the core rod 3. By changing the diameter of the core rod 3, the conductivity efficiency of the core rod 3 will be improved, and the versatility of the insulating tube sleeve 1 will be enhanced.

[0030] In this embodiment, as Figure 1 and Figure 2 shown, a connecting fixture 7 is movably connected to the top of the core rod 3. A sleeve is integrally formed at the bottom of the connecting fixture 7, and the connecting fixture 7 is connected to the external thread 4 at the top of the core rod 3 through the sleeve.

[0031] It should be noted that the connecting fixture 7 is threadedly connected to the top external thread 4 through the sleeve, which can quickly assemble the connecting fixture 7.

[0032] In this embodiment, as Figure 2 and Figure 3 shown, a plurality of sets of the first locking nuts 6 are provided. The lower set of the first locking nuts 6 abuts against the top surface of the insulating tube sleeve 1, and the upper set of the first locking nuts 6 abuts against the bottom of the sleeve of the connecting fixture 7.

[0033] It should be noted that the two sets of the first locking nuts 6 respectively abut against the top surface of the insulating tube sleeve 1 and the bottom of the sleeve of the connecting fixture 7, which can fix the core rod 3 and the connecting fixture 7 and improve the installation stability of the core rod 3 and the connecting fixture 7.

[0034] In this embodiment, as Figure 2 and Figure 3 shown, a conical limiting seat 10 is movably inserted into the bottom of the insulating tube sleeve 1. A plug hole is formed through the center of the conical limiting seat 10, the strengthening sleeve 8 is inserted into the plug hole, a top disk 11 is movably arranged on the bottom surface of the conical limiting seat 10, the upper surface of the top disk 11 abuts against the lower surface of the conical limiting seat 10, and the bottom of the core rod 3 is threadedly connected to a second locking nut 12 through an external thread 4. The second locking nut 12 abuts against the lower surface of the top disk 11.

[0035] It should be noted that the conical limit seat 10 is inserted into the bottom of the reinforcing sleeve 8. By rotating the second locking nut 12, the second locking nut 12 will, under the action of the thread, push the top plate 11 to apply an upward thrust to the conical limit seat 10, and the bottom of the reinforcing sleeve 8 can be limited by the conical limit seat 10, improving the stability of the core rod 3.

[0036] In this embodiment, as Figure 1 and Figure 4 shown, a fixed plate 13 is fixedly connected to the bottom surface of the insulating tube sleeve 1, and a rubber pad 14 is movably arranged on the lower surface of the fixed plate 13.

[0037] It should be noted that the bottom of the insulating tube sleeve 1 can be fixed by matching the fixed plate 13 with fixing bolts. The lower surface of the fixed plate 13 contacts the surface of the transformer through the rubber pad 14, and the rubber pad 14 can play an insulating role.

[0038] The working principle and usage process of the present utility model: The bottom of the insulating tube sleeve 1 can be fixed by matching the fixed plate 13 with fixing bolts. The lower surface of the fixed plate 13 contacts the surface of the transformer through the rubber pad 14, and the rubber pad 14 can play an insulating role. The core rod 3 is inserted through the inner cavity of the insulating tube sleeve 1, and both the top and bottom of the core rod 3 extend out of the insulating tube sleeve 1. The connecting clamp 7 is threadedly connected to the top external thread 4 through a sleeve. The cable can be connected through the connecting clamp 7. The wire inside the transformer can be threadedly connected to the external thread 4 at the bottom of the core rod 3. The insulating tube sleeve 1 and the insulating bowl 2 have insulation properties, which can prevent the current from being transmitted to the transformer housing, improving the safety of the transformer during use. The reinforcing sleeve 8 is sleeved on the surface of the core rod 3, and the inner wall of the reinforcing sleeve 8 is closely attached to the outer wall surface of the core rod 3. The top of the reinforcing sleeve 8 abuts against the lower surface of the limit plate 5 through the connecting plate 9, enabling the reinforcing sleeve 8 and the core rod 3 to form an integral structure. The conical limit seat 10 is inserted into the bottom of the reinforcing sleeve 8. By rotating the second locking nut 12, the second locking nut 12 will, under the action of the thread, push the top plate 11 to apply an upward thrust to the conical limit seat 10, and the bottom of the reinforcing sleeve 8 can be limited by the conical limit seat 10, improving the stability of the core rod 3. By changing the diameter of the core rod 3, the conductive efficiency of the core rod 3 will be improved, and the versatility of the insulating tube sleeve 1 will be enhanced.

[0039] It should be understood that the above specific embodiments of the present utility model are only used for exemplary illustration or explanation of the principle of the present utility model, and do not constitute a limitation to the present utility model. Therefore, any modifications, equivalent replacements, improvements, etc. made without departing from the spirit and scope of the present utility model shall be included within the protection scope of the present utility model. In addition, the appended claims of the present utility model are intended to cover all changes and modification examples falling within the scope and boundary of the appended claims or equivalent forms of such scope and boundary.

Claims

1. A casing structure includes an insulating sleeve (1) and an insulating bowl (2). The insulating bowls (2) are equidistantly arranged on the surface of the insulating sleeve (1). The insulating sleeve (1) and the insulating bowls (2) are of an integral molding structure. It is characterized in that, A core rod (3) is movably inserted into the inner cavity of the insulating pipe sleeve (1), and external threads (4) are provided on the surfaces at both ends of the core rod (3); A limiting disc (5) is fixedly connected to the top surface of the core rod (3), the upper surface of the limiting disc (5) abuts against the top surface of the inner cavity of the insulating pipe sleeve (1), and a first locking nut (6) is threadedly connected to the top of the core rod (3) through the external thread (4); A reinforcing sleeve (8) is movably sleeved on the surface of the core rod (3), the inner wall of the reinforcing sleeve (8) is closely attached to the outer wall surface of the core rod (3), a connecting disc (9) is integrally formed at the top of the reinforcing sleeve (8), and the connecting disc (9) abuts against the lower surface of the limiting disc (5).

2. The casing structure according to claim 1, characterized in that, A connecting clamp (7) is movably connected to the top of the core rod (3), a sleeve is integrally formed at the bottom of the connecting clamp (7), and the connecting clamp (7) is connected to the external thread (4) at the top of the core rod (3) through the sleeve.

3. A casing structure according to claim 2, characterized in that, There are multiple groups of the first locking nuts (6). The lower group of the first locking nuts (6) abuts against the top surface of the insulating pipe sleeve (1), and the upper group of the first locking nuts (6) abuts against the bottom of the sleeve of the connecting clamp (7).

4. A casing structure according to claim 3, characterized in that, A conical limiting seat (10) is movably inserted into the bottom of the insulating pipe sleeve (1), a plugging hole is penetrated through the center of the conical limiting seat (10), and the reinforcing sleeve (8) is inserted into the plugging hole.

5. A casing structure according to claim 4, characterized in that, A top disc (11) is movably arranged on the bottom surface of the conical limiting seat (10), and the upper surface of the top disc (11) abuts against the lower surface of the conical limiting seat (10).

6. The casing structure according to claim 5, characterized in that, A second locking nut (12) is threadedly connected to the bottom of the core rod (3) through the external thread (4), and the second locking nut (12) abuts against the lower surface of the top disc (11).

7. A casing structure according to claim 6, characterized in that A fixed disc (13) is fixedly connected to the bottom surface of the insulating pipe sleeve (1), and a rubber pad (14) is movably arranged on the lower surface of the fixed disc (13).

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