A large power oil-immersed roller anti-leakage terminal box

Abstract

This utility model discloses a leak-proof junction box for a high-power oil-immersed drum, belonging to the technical field of junction boxes. It includes a drum shaft head, one end of which is fixedly connected to a first box body, and the other end of which is fixedly connected to a second box body. A sealing cover is fixedly connected to the other end of the second box body, and a partition is integrally formed on the inner wall of the second box body. It also includes a sealing ring and a wiring assembly, with the sealing ring positioned between the drum shaft head and the first box body, the first and second box bodies, and the second box body and the sealing cover. The rotating installation of the sealing cover facilitates quick installation and removal, allowing for easy disassembly and maintenance of the wiring inside the junction box. The sealing cover uses a compression-type locking mechanism to ensure stable and secure installation. Combined with the compression of the sealing ring, this improves the sealing performance between the sealing cover and the second box body, enhancing the convenience of later maintenance.

Description

Technical Field

[0001] This utility model relates to the field of junction box technology, specifically a high-power oil-immersed roller leak-proof junction box. Background Technology

[0002] Oil-immersed electric drum is an industrial drive device that dissipates heat by directly contacting the motor rotor and stator windings with oil. Its core feature is that the oil is introduced into the motor to achieve heat dissipation and lubrication. The heat is transferred to the drum wall by the rotation of the drum, thus achieving heat dissipation. This design allows the oil to perform both lubrication and cooling functions, reducing the need for external heat dissipation devices. To ensure the power supply to the motor, a junction box is usually installed at one end of the drum.

[0003] An investigation revealed that a utility model patent (publication number: CN209642465U) discloses a junction box for an electric roller, comprising a junction box base, a junction box cover, a terminal board disposed within the junction box base, and multiple threaded terminals disposed on the terminal board. A lead-in hole is provided in the center of the junction box base, and multiple metal tees are disposed within the junction box base on the side of the lead-in hole. These metal tees connect the inner cavity of the junction box base, the outer side of the junction box base, and the lead-in hole, respectively. This utility model has a simple structure, short processing cycle, low cost, and is easy to operate.

[0004] The junction box structure at the end of the roller is simple. The inspection cover at the end is usually installed and fixed by bolts. This makes it difficult to quickly remove and install the inspection cover when performing maintenance on the wiring, thus affecting the efficiency of subsequent maintenance. At the same time, the traditional junction box structure has poor sealing effect when connecting the lead wires, which can easily cause oil leakage from the wire core.

[0005] Therefore, this utility model provides a leak-proof junction box for a high-power oil-immersed drum to solve the above problems. Utility Model Content

[0006] (a) Technical problems to be solved

[0007] This utility model provides a leak-proof junction box for a high-power oil-immersed drum, aiming to solve the problems mentioned in the background art.

[0008] (II) Technical Solution

[0009] To achieve the above objectives, the present invention provides the following technical solution: a leak-proof junction box for a high-power oil-immersed drum, comprising a drum shaft head, one end of which is fixedly connected to a first box body, the other end of which is fixedly connected to a second box body, the other end of which is fixedly connected to a sealing cover, and a partition integrally provided on the inner wall of the second box body;

[0010] The sealing ring and the wiring assembly are provided. The sealing ring is located between the roller shaft head and the first box, the first box and the second box, and the second box and the sealing cover. The wiring assembly is fixedly connected to the partition plate, and the two ends of the wiring assembly extend symmetrically through both sides of the partition plate.

[0011] As a preferred technical solution of this application, a first flange ring is integrally formed at one end of the first box body, and a second flange ring is integrally formed on the inner wall of the other end of the first box body. Positioning holes are provided on the circumference of the first flange ring and the second flange ring.

[0012] As a preferred technical solution of this application, the end of the roller shaft near the first box body is provided with a first threaded hole corresponding to the positioning hole of the second flange ring, and the end of the second box body near the first box body is provided with a second threaded hole corresponding to the positioning hole of the first flange ring.

[0013] As a preferred technical solution of this application, the outer wall of the roller shaft head near the first box body is in the shape of a recessed step, and the cross section of the first box body near the roller shaft head is in the shape of an L-shape, and the L-shape is fitted on the outside of the stepped roller shaft head.

[0014] As a preferred technical solution of this application, the second box body is provided with an abutment plate at one end near the sealing cover, and a slot is evenly opened around the center line of the abutment plate, and a rubber pad is fixedly connected to the inner wall of the slot.

[0015] As a preferred technical solution of this application, the inner wall of the sealing cover is fixedly connected with a locking block, and the locking block rotates and abuts against the inside of the locking groove. The cross-section of the locking block has a convex shape, and the outer wall of the sealing cover is provided with anti-slip texture.

[0016] As a preferred technical solution of this application, the wiring assembly includes a terminal block, a retaining sleeve is provided on the outside of the terminal block, and the retaining sleeve has a T-shaped cylindrical structure. A positioning sleeve is provided on the outside of the retaining sleeve. The retaining sleeve and the positioning sleeve abut against both sides of the partition. A sealing gasket is provided on the side of the retaining sleeve and the positioning sleeve that contacts the partition. A spring washer is abutted on the side of the retaining sleeve and the positioning sleeve that is away from each other. A nut is abutted on the other end of the spring washer. The nut is threadedly connected to the outer wall of the terminal block.

[0017] (III) Beneficial Effects

[0018] The beneficial effects of this application are as follows:

[0019] 1. This utility model facilitates quick installation and removal of the sealing cover through a rotary installation operation, thereby making it convenient to disassemble and maintain the wiring inside the junction box cavity. At the same time, the sealing cover adopts a compression-type snap-fit ​​positioning to ensure its installation stability and firmness. Combined with the compression of the sealing ring, it improves the sealing performance between the sealing cover and the second box body, and improves the convenience of its later maintenance.

[0020] 2. This utility model installs the terminal blocks by penetrating the partition, so that the two end connectors are located in the junction box cavity and the terminal socket cavity respectively. The lead wire is connected to the terminal block in the terminal socket cavity, which effectively prevents the leakage of oil from the wire core. The hole where the terminal blocks penetrate the partition is sealed by a sealing gasket. At the same time, the first box body, the second box body and the roller shaft head are all sealed by sealing rings, which improves the overall sealing and protection level of the junction box. Attached Figure Description

[0021] Figure 1 This is a partial structural schematic diagram of the axial cross-section of this utility model;

[0022] Figure 2 For the present utility model Figure 1 A magnified structural diagram of A in the middle;

[0023] Figure 3 This is a schematic diagram of the overall structure of the present utility model;

[0024] Figure 4 This is a schematic diagram of the overall structure of the first box body of this utility model;

[0025] Figure 5 This is a schematic diagram of the overall structure of the second box body of this utility model;

[0026] Figure 6 This is a schematic diagram of the overall structure of the sealing cap of this utility model.

[0027] In the picture:

[0028] 1. Roller shaft head; 2. First housing; 21. First flange ring; 22. Second flange ring; 3. Second housing; 31. Partition plate; 32. Abutment plate; 33. Slot; 34. Rubber gasket; 4. Sealing cover; 41. Locking block; 5. Sealing ring; 6. Wiring assembly; 61. Terminal post; 62. Sleeve; 63. Positioning sleeve; 64. Spring washer; 65. Nut; 66. Sealing gasket. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] like Figure 1-6 As shown, this utility model provides a leak-proof junction box for a high-power oil-immersed drum, including a drum shaft head 1, a first box body 2 fixedly connected to one end of the drum shaft head 1, a second box body 3 fixedly connected to the other end of the first box body 2, a sealing cover 4 fixedly connected to the other end of the second box body 3, and a partition 31 integrally provided on the inner wall of the second box body 3; a sealing ring 5 and a wiring assembly 6. The sealing ring 5 is located between the drum shaft head 1 and the first box body 2, the first box body 2 and the second box body 3, and the second box body 3 and the sealing cover 4, and the wiring assembly 6 is fixedly connected to the partition 31, with both ends of the wiring assembly 6 symmetrically extending through both sides of the partition 31. The partition 31 forms a wiring seat cavity between the second box body 3 and the first box body 2, and a junction box cavity between the second box body 3 and the sealing cover 4. The sealing ring 5 is connected between the first box body 2, the second box body 3, and the drum shaft head 1, thereby improving the sealing effect of their interconnection.

[0031] Furthermore, a first flange ring 21 is integrally formed at one end of the first box body 2, and a second flange ring 22 is integrally formed on the inner wall of the other end of the first box body 2. Positioning holes are provided on the circumference of the first flange ring 21 and the second flange ring 22. A first threaded hole is provided at the end of the roller shaft head 1 near the first box body 2 corresponding to the positioning hole of the second flange ring 22. A second threaded hole is provided at the end of the second box body 3 near the first box body 2 corresponding to the positioning hole of the first flange ring 21. Fastening bolts pass through the positioning holes and are connected to the first threaded hole or the second threaded hole, thereby realizing a sealed and fixed connection between the first box body 2 and the roller shaft head 1, as well as between the first box body 2 and the second box body 3.

[0032] Furthermore, the outer wall of the end of the roller shaft head 1 near the first box body 2 is recessed and stepped, and the cross section of the end of the first box body 2 near the roller shaft head 1 is L-shaped, and the L-shaped structure is fitted onto the stepped exterior of the roller shaft head 1.

[0033] Furthermore, the second box 3 is provided with an abutment plate 32 at one end near the sealing cover 4, and a slot 33 is evenly opened around the center line of the abutment plate 32. A rubber pad 34 is fixedly connected to the inner wall of the slot 33, and a through slot for wires is provided on one side of the second box 3 to facilitate the through-path of the wires. Through the cooperation of the slot 33 and the rubber pad 34, when the block 41 is engaged in the slot 33, the rubber pad 34 needs to be squeezed before the block 41 can rotate and engage in the slot 33, thereby improving the squeezing effect of the block 41 and preventing the block 41 from sliding. The inner wall of the sealing cover 4 is fixedly connected with the block 41, and the block 41 rotates and abuts against the inside of the slot 33. The cross-section of the block 41 is convex. The outer wall of the sealing cover 4 is provided with anti-slip texture. The setting of the external anti-slip texture makes it easy to rotate the sealing cover 4 by hand.

[0034] Furthermore, the wiring assembly 6 includes a terminal 61, with a retaining sleeve 62 fitted around the terminal 61. The retaining sleeve 62 has a T-shaped cylindrical structure, and a positioning sleeve 63 fitted around the retaining sleeve 62. The retaining sleeve 62 and the positioning sleeve 63 abut against both sides of the partition 31. A sealing gasket 66 is provided on the side of the retaining sleeve 62 and the positioning sleeve 63 that is in contact with the partition 31. A spring washer 64 is abutted on the side of the retaining sleeve 62 and the positioning sleeve 63 that is away from each other. The other end of the spring washer 64 abuts against a nut 65. The nut 65 is threaded onto the outer wall of the terminal 61. By squeezing the sealing gasket 66, the wiring assembly 6 is sealed and squeezed onto the partition 31, thereby improving the sealing and firmness of the wiring assembly 6 installation. At the same time, the squeeze-type tight fixing position is more flexible and convenient for installing and fixing partitions 31 of different thicknesses. In addition, the wiring assembly 6 adopts a two-end wiring structure to avoid through connection of the wire core, thereby effectively preventing the leakage of oil from the wire core.

[0035] Working principle: First, the device is installed and fixed, and the wiring and wiring assembly 6 are connected and fixed to each other. When the wiring at the wiring assembly 6 is inspected, the locking block 41 can be disengaged from the outside of the slot 33 by rotating and pulling the sealing cover 4, thereby realizing the quick disassembly of the sealing cover 4. Conversely, the locking block 41 can be locked into the inside of the slot 33 and rotated to lock the locking block 41 into the inside of the slot 33. With the elastic compression of the rubber pad 34, the locking firmness of the locking block 41 is improved.

[0036] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A leak-proof junction box for a high-power oil-immersed drum, characterized in that: Includes a roller shaft head (1), one end of which is fixedly connected to a first box body (2), the other end of which is fixedly connected to a second box body (3), the other end of which is fixedly connected to a sealing cover (4), and the inner wall of the second box body (3) is integrally provided with a partition (31). The sealing ring (5) and the wiring assembly (6) are located between the roller shaft head (1) and the first box (2), the first box (2) and the second box (3), and the second box (3) and the sealing cover (4). The wiring assembly (6) is fixedly connected to the partition (31), and the two ends of the wiring assembly (6) symmetrically extend through both sides of the partition (31).

2. A leakproof terminal box for a high-power oil-immersed roller according to claim 1, characterized in that: One end of the first box body (2) is integrally formed with a first flange ring (21), and the inner wall of the other end of the first box body (2) is integrally formed with a second flange ring (22). The first flange ring (21) and the second flange ring (22) are provided with positioning holes around their circumference.

3. A leakproof terminal box for a high-power oil-immersed roller according to claim 2, characterized in that: The roller shaft head (1) has a first threaded hole at the end near the first box body (2) corresponding to the positioning hole of the second flange ring (22), and the second box body (3) has a second threaded hole at the end near the first box body (2) corresponding to the positioning hole of the first flange ring (21).

4. A leakproof terminal box for a high-power oil-immersed roller according to claim 3, characterized in that: The outer wall of the roller shaft head (1) near the first box body (2) is recessed and stepped. The cross section of the first box body (2) near the roller shaft head (1) is L-shaped and the L-shaped structure is fitted on the outside of the stepped roller shaft head (1).

5. A leakproof terminal box for a high power oil immersed roller according to claim 1, characterized in that: The second box body (3) is provided with an abutment plate (32) at one end near the sealing cover (4), and a slot (33) is evenly provided around the center line of the abutment plate (32), and a rubber pad (34) is fixedly connected to the inner wall of the slot (33).

6. A leakproof terminal box for a high power oil immersed roller according to claim 5, characterized in that: The inner wall of the sealing cover (4) is fixedly connected to a locking block (41), and the locking block (41) rotates and abuts against the inside of the locking groove (33). The cross-section of the locking block (41) is convex, and the outer wall of the sealing cover (4) is provided with anti-slip texture.

7. A leakproof terminal box for a high power oil immersed roller according to claim 1, characterized in that: The wiring assembly (6) includes a terminal (61), a sleeve (62) is fitted around the terminal (61), and the sleeve (62) has a T-shaped cylindrical structure. A positioning sleeve (63) is fitted around the sleeve (62). The sleeve (62) and the positioning sleeve (63) abut against the two sides of the partition (31). A sealing gasket (66) is provided on the side of the sleeve (62) and the positioning sleeve (63) that contacts the partition (31). A spring washer (64) abuts against the side of the sleeve (62) and the positioning sleeve (63) that is away from each other. A nut (65) abuts against the other end of the spring washer (64). The nut (65) is threadedly connected to the outer wall of the terminal (61).

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