Wire passing sealing structure of isolation transformer box

Abstract

The utility model discloses a wire-passing sealing structure of an isolation transformer box, which relates to the field of isolation transformer boxes and comprises a transformer box body, a mounting hole is arranged inside the transformer box body, a mounting cylinder is fixedly connected inside the mounting hole, an internal thread is arranged inside the mounting cylinder, one side of the internal thread is provided with an annular inner groove, and the other side of the internal thread is provided with an annular outer groove. The interior of the annular inner groove is fixedly connected with an extrusion spring, one side of the extrusion spring is connected with a circular pressing plate, one side of the circular pressing plate is provided with a circular rubber waterproof layer, one side of the circular rubber waterproof layer is provided with a guide groove, one side of the mounting cylinder is provided with a fixing plate, and a first sealing groove is formed in the fixing plate; a guide block is fixed to the outer wall of the fixing plate. According to the utility model, the installation cylinder is blocked, so that the threaded connection part of the installation cylinder and the adapter can be well sealed and protected, rainwater is prevented from entering the installation cylinder to corrode the threads, and the protection property of the device is improved.

Description

Technical Field

[0001] The utility model relates to the field of isolation transformer boxes, in particular to a wire passing sealing structure of an isolation transformer box. Background Art

[0002] A transformer is a device that uses the principle of electromagnetic induction to change AC voltage. Its main components are the primary coil, secondary coil and iron core (magnetic core). Its main functions include: voltage conversion, current conversion, impedance conversion, isolation, voltage stabilization (magnetic saturation transformer), etc.

[0003] At present, the sealing methods of the cable holes of the isolation transformer box mainly include resin infusion and waterproof joints. Since the isolation transformer box is used in an airport, and the airport has a large temperature difference, if the cable holes of the isolation transformer box are sealed by resin infusion, due to the principle of thermal expansion and contraction, the resin and the isolation transformer are easily separated, which will cause water or mud and sand particles to enter the isolation transformer box, and the sealing effect cannot be achieved well. If a waterproof joint is used to seal the cable holes of the isolation transformer box, since the waterproof joint is long, it will occupy a large space in the isolation transformer box, not only making the cable need to be bent at a larger angle and more prone to cracking, but also making the waterproof joint subject to greater force and more prone to water ingress, and the sealing effect cannot be achieved well.

[0004] After searching the existing Chinese patents: a wire sealing structure for an isolation transformer box (Announcement No.: CN218100869U), which includes a barrel body, a mounting seat and a sealing assembly, the barrel body is provided with a barrel body through hole, the mounting seat is installed on the outer wall of the barrel body, and the mounting seat is penetrated through the barrel body through hole, abuts against the outer wall of the barrel body and separates the inside and outside of the barrel body, the mounting seat is provided with a mounting through hole facing the inside of the barrel body, the mounting seat is provided with a sealing groove, the opening of the sealing groove faces the inside of the barrel body, the sealing assembly is installed inside the sealing groove and matches the sealing groove, a sealing through hole matching the cable is formed on the sealing assembly, the barrel body through hole, the mounting through hole and the sealing through hole are interconnected. This application adopts the combination of the mounting seat and the sealing assembly, so that the wire sealing structure will not be separated from the cable placed therein due to thermal expansion and contraction, which is more conducive to use in an environment with a large temperature difference.

[0005] Although the above patent achieves a better sealing effect through a sealing component, the device has a shortcoming that the mounting base and the adapter are threadedly connected, and the mounting base is exposed to the external environment for a long time, and rainwater will enter the inside of the mounting base, which will cause the threads at the connection between the mounting base and the adapter to slowly rust, making it impossible for the adapter to be rotated out of the mounting base, thereby affecting the disassembly of the adapter.

[0006] Therefore, it is necessary to invent a wire sealing structure for an isolation transformer box to solve the above problems. Utility Model Content

[0007] The utility model aims to provide a wire sealing structure for an isolation transformer box to solve the problem in the background art that it is inconvenient to disassemble the adapter when the threads inside the mounting seat are corroded by rainwater.

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a wire-passing sealing structure for an isolation transformer box, comprising a transformer box, a mounting hole is provided inside the transformer box, a mounting cylinder is fixedly connected inside the mounting hole, an internal thread is provided inside the mounting cylinder, an annular inner groove is provided on one side of the internal thread, an extrusion spring is fixedly connected inside the annular inner groove, a circular pressure plate is connected on one side of the extrusion spring, a circular rubber waterproof layer is provided on one side of the circular pressure plate, a guide groove is provided on one side of the circular rubber waterproof layer, a fixing plate is provided on one side of the mounting cylinder, a first sealing groove is provided inside the fixing plate, a guide block is fixed on the outer wall of the fixing plate, the outer diameter of the guide block is the same as the inner diameter of the guide groove, and the guide block slides in the guide groove.

[0009] Preferably, the interior of the first sealing groove is connected to a first sub-rubber plug, and one side of the first sub-rubber plug is connected to a first mother rubber plug.

[0010] Preferably, an adapter is connected to the interior of the installation tube, and a second sealing groove is provided inside the adapter.

[0011] Preferably, an outer wall of the adapter is provided with an external thread, and a first end is fixed to a side surface of the adapter.

[0012] Preferably, the interior of the second sealing groove is connected to a second female rubber plug, and one side of the second female rubber plug is connected to a second sub-rubber plug.

[0013] Preferably, a core plug is provided on one side of the second sub-rubber plug, and a notch wedge is connected to one side of the core plug.

[0014] Preferably, a second end is fixed to the side of the notched wedge, and an electric wire is connected inside the second end.

[0015] Technical effects and advantages of the utility model:

[0016] 1. By setting up a protective mechanism, firstly, the adapter is threadedly connected with the internal thread in the installation tube through the external thread. After the connection is completed, the circular rubber waterproof layer is placed into the installation tube from the end of the installation tube away from the adapter, and then the fixing plate is placed into the installation tube. Two groups of guide blocks are fixed on the side of the fixing plate, and two groups of guide grooves are opened on the side of the installation tube, so that the two groups of guide blocks can slide into the installation tube through the two groups of guide grooves. An annular inner groove is provided on one side of the two groups of guide grooves, and an extrusion spring is fixed inside the annular inner groove. A circular pressure plate is fixed on one side of the extrusion spring. In this way, when the fixing plate slides into the installation tube, the two groups of guide blocks squeeze the circular rubber waterproof layer and the circular pressure plate, and the extrusion spring is squeezed by the circular pressure plate and deformed. Then, the fixing plate is rotated to a certain angle and then released. At this time, the extrusion spring loses its extrusion and is deformed and reset. In this way, the circular pressure plate squeezes the circular rubber waterproof layer, and the circular rubber waterproof layer squeezes the two groups of guide blocks, so that the two groups of guide blocks are fixed in the annular inner groove. In this way, the fixing plate is fixed in the installation tube. Then, the first sub-rubber plug and the first mother rubber plug are installed in the first sealing groove opened inside the installation tube, so that the first sub-rubber plug and the first mother rubber plug seal the first sealing groove. In this way, the threaded connection between the installation tube and the adapter is sealed and protected by the fixing plate, the circular rubber waterproof layer, the first sub-rubber plug and the first mother rubber plug, thereby preventing rainwater from entering the installation tube to rust the threads and causing the adapter to be unable to rotate, thereby improving the protection of the device;

[0017] 2. By setting a sealing component, the adapter is connected to the internal thread of the mounting tube through an external thread, and a second sealing groove is opened inside the adapter. The second sealing groove is connected to the second female rubber plug and the second sub-rubber plug. A notched wedge is set on one side of the second sub-rubber plug, and a core is connected to the notched wedge. In this way, the wires can be well encapsulated in the second sealing groove, so as to prevent the entry of rainwater from the outside, thereby achieving a multiple sealing and waterproof effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a front view structural schematic diagram of a wire passing sealing structure of an isolation transformer box according to the utility model.

[0020] Figure 2 This is a disassembled diagram of a wire-passing sealing mechanism of a wire-passing sealing structure of an isolation transformer box of the utility model.

[0021] Figure 3 The utility model is a schematic diagram of a top view of a wire sealing structure of an isolation transformer box.

[0022] Figure 4 The utility model is a bottom view structural schematic diagram of a wire passing sealing structure of an isolation transformer box.

[0023] In the figure: 1. transformer box; 2. mounting hole; 3. mounting cylinder; 4. internal thread; 5. annular inner groove; 6. extrusion spring; 7. circular pressure plate; 8. circular rubber waterproof layer; 9. guide groove; 10. fixing plate; 11. first sealing groove; 12. guide block; 13. first sub-rubber plug; 14. first female rubber plug; 15. adapter; 16. second sealing groove; 17. external thread; 18. first terminal; 19. second female rubber plug; 20. second sub-rubber plug; 21. core filling; 22. notch wedge; 23. second terminal; 24. wire. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the utility model claimed for protection, but merely represents the selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0025] The utility model provides Figure 1-4The wire sealing structure of an isolation transformer box shown in the figure comprises a transformer box 1, a mounting hole 2 is provided inside the transformer box 1, wherein the mounting hole 2 serves to install a mounting tube 3, a mounting tube 3 is fixedly connected inside the mounting hole 2, wherein the mounting tube 3 serves to connect an adapter 15, an internal thread 4 is provided inside the mounting tube 3, wherein the internal thread 4 serves to connect an external thread 17, an annular inner groove 5 is provided on one side of the internal thread 4, wherein the annular inner groove 5 serves to install an extrusion spring 6, an extrusion spring 6 is fixedly connected inside the annular inner groove 5, wherein the extrusion spring 6 serves to reset the deformation, a circular pressure plate 7 is connected on one side of the extrusion spring 6, wherein the circular pressure plate 7 serves to extrude the extrusion spring 6 A circular rubber waterproof layer 8 is provided on one side of the circular pressure plate 7, wherein the circular rubber waterproof layer 8 plays a waterproof role, a guide groove 9 is provided on one side of the circular rubber waterproof layer 8, wherein the guide groove 9 allows a guide block 12 to slide inside it, a fixed plate 10 is provided on one side of the mounting tube 3, wherein the fixed plate 10 plays a role of closing the mounting tube 3, a first sealing groove 11 is opened inside the fixed plate 10, wherein the first sealing groove 11 plays a role of connecting the first sub-rubber plug 13 and the first mother rubber plug 14, a guide block 12 is fixed to the outer wall of the fixed plate 10, wherein the guide block 12 plays a role of guiding the movement of the fixed plate 10, the outer diameter of the guide block 12 is the same as the inner diameter of the guide groove 9, and the guide block 12 slides in the guide groove 9.

[0026] A first sub-rubber plug 13 is connected to the interior of the first sealing groove 11 , and a first mother rubber plug 14 is connected to one side of the first sub-rubber plug 13 , wherein the first sub-rubber plug 13 and the first mother rubber plug 14 play a role in sealing the first sealing groove 11 .

[0027] The inside of the installation tube 3 is connected with an adapter 15 , and the inside of the adapter 15 is provided with a second sealing groove 16 , wherein the adapter 15 serves to connect the installation tube 3 , and the second sealing groove 16 serves to connect the second female rubber plug 19 and the second sub-rubber plug 20 .

[0028] An external thread 17 is formed on the outer wall of the adapter 15 , and a first end 18 is fixed to the side of the adapter 15 , wherein the external thread 17 serves to connect with the internal thread 4 , and the first end 18 serves to facilitate the disassembly and assembly of the adapter 15 .

[0029] A second female rubber plug 19 is connected to the interior of the second sealing groove 16 , and a second sub-rubber plug 20 is connected to one side of the second female rubber plug 19 , wherein the second female rubber plug 19 and the second sub-rubber plug 20 play a role in sealing the second sealing groove 16 .

[0030] A plug 21 is disposed on one side of the second sub-rubber plug 20 , and a notch wedge 22 is connected to one side of the plug 21 , wherein the plug 21 and the notch wedge 22 play a role in sealing the second sealing groove 16 , thereby achieving a double sealing effect.

[0031] A second end 23 is fixed to the side of the notch wedge 22 , and an electric wire 24 is connected to the interior of the second end 23 , wherein the second end 23 serves to facilitate the disassembly and assembly of the notch wedge 22 .

[0032] Working principle: When in use, firstly, thread the adapter 15 with the internal thread 4 in the installation tube 3 through the external thread 17. After the connection is completed, the circular rubber waterproof layer 8 is placed into the installation tube 3 from the end of the installation tube 3 away from the adapter 15, and then the fixing plate 10 is placed into the installation tube 3. Two groups of guide blocks 12 are fixed on the side of the fixing plate 10, and two groups of guide grooves 9 are opened on the side of the installation tube 3, so that the two groups of guide blocks 12 can slide into the installation tube 3 through the two groups of guide grooves 9. One side of the two groups of guide grooves 9 is provided with an annular inner groove 5, and an extrusion spring 6 is fixed inside the annular inner groove 5. A circular pressure plate 7 is fixed on one side of the extrusion spring 6. In this way, when the fixing plate 10 slides into the installation tube 3, the two groups of guide blocks 12 squeeze the circular rubber waterproof layer 8 and the circular pressure plate 7, and the extrusion spring 6 is squeezed by the circular pressure plate 7 and deformed, and then After rotating the fixing plate 10 to a certain angle, release it. At this time, the extrusion spring 6 loses its extrusion and deforms to reset. In this way, the circular pressure plate 7 squeezes the circular rubber waterproof layer 8, and the circular rubber waterproof layer 8 squeezes the two groups of guide blocks 12, so that the two groups of guide blocks 12 are fixed in the annular inner groove 5. In this way, the fixing plate 10 is fixed in the mounting tube 3, and then the first sub-rubber plug 13 and the first mother rubber plug 14 are installed in the first sealing groove 11 opened inside the mounting tube 3, so that the first sub-rubber plug 13 and the first mother rubber plug 14 seal the first sealing groove 11. In this way, the threaded connection between the mounting tube 3 and the adapter 15 is sealed and protected by the fixing plate 10, the circular rubber waterproof layer 8, the first sub-rubber plug 13 and the first mother rubber plug 14, thereby preventing rainwater from entering the mounting tube 3 to rust the threads and causing the adapter 15 to be unable to rotate, thereby improving the protectiveness of the device.

[0033] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A wire sealing structure for an isolation transformer box, comprising a transformer box (1), characterized in that: The transformer box (1) is provided with a mounting hole (2) inside, a mounting tube (3) is fixedly connected inside the mounting hole (2), an internal thread (4) is provided inside the mounting tube (3), an annular inner groove (5) is provided on one side of the internal thread (4), an extrusion spring (6) is fixedly connected inside the annular inner groove (5), a circular pressing plate (7) is connected on one side of the extrusion spring (6), a circular rubber waterproof layer (8) is provided on one side of the circular pressing plate (7), a guide groove (9) is provided on one side of the circular rubber waterproof layer (8), a fixing plate (10) is provided on one side of the mounting tube (3), a first sealing groove (11) is provided inside the fixing plate (10), a guide block (12) is fixed on the outer wall of the fixing plate (10), the outer diameter of the guide block (12) is the same as the inner diameter of the guide groove (9), and the guide block (12) slides in the guide groove (9).

2. The wire sealing structure of an isolation transformer box according to claim 1, characterized in that: The interior of the first sealing groove (11) is connected to a first sub-rubber plug (13), and one side of the first sub-rubber plug (13) is connected to a first mother rubber plug (14).

3. The wire sealing structure of an isolation transformer box according to claim 1, characterized in that: The interior of the installation tube (3) is connected to an adapter (15), and the interior of the adapter (15) is provided with a second sealing groove (16).

4. The wire sealing structure of the isolation transformer box according to claim 3 is characterized in that: An external thread (17) is formed on the outer wall of the adapter (15), and a first end (18) is fixed to the side of the adapter (15).

5. The wire sealing structure of the isolation transformer box according to claim 3 is characterized in that: The interior of the second sealing groove (16) is connected to a second female rubber plug (19), and one side of the second female rubber plug (19) is connected to a second sub-rubber plug (20).

6. The wire sealing structure of the isolation transformer box according to claim 5, characterized in that: A core plug (21) is provided on one side of the second sub-rubber plug (20), and a notch wedge (22) is connected to one side of the core plug (21).

7. The wire sealing structure of the isolation transformer box according to claim 6, characterized in that: A second end (23) is fixed to the side of the notched wedge (22), and an electric wire (24) is connected inside the second end (23).

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