Fuse tube for high humidity environment

Abstract

The utility model discloses a high humidity environment is with fuse tube relates to fuse tube field, to solve the problem of the discharge or short circuit failure caused by the moisture in the environment easily entering the inside of fuse tube only through the poor sealing of the mode of clamping due to the high humidity environment when the fuse tube is used in the prior art. The side end face of the pipe body away from the connector is provided with an annular sealing slot, a sealing ring is inserted into the annular sealing slot, sealing rings are fixedly connected to the two sides of the sealing ring, an end cover is inserted into one end of the pipe body away from the connector, one end of the end cover extends out of the side end face of the pipe body and is fixedly connected with a fixing ring, a top pressing ring is fixedly connected to the side end face adjacent to the pipe body on the fixing ring, and a screw cap is rotatably arranged on the outside of the fixing ring. Through the annular sealing slot, the sealing ring and the double sealing ring structure with the annular air cavity, double pressure sealing between the pipe body and the end cover is realized, and the discharge or short circuit failure caused by the moisture invasion is prevented.

Description

Technical Field

[0001] This utility model relates to the field of fuse tubes, specifically a fuse tube for use in high humidity environments. Background Technology

[0002] A fuse tube is a protective device used in power systems. It is typically made of an insulating material (such as ceramic, glass, or high-temperature resistant plastic) and has a cylindrical structure containing a fuse wire (circuit breaker). When an overload or short-circuit fault occurs in the circuit, the fuse wire melts at high temperature, quickly cutting off the current and preventing equipment damage or fire risks. Fuse tubes are widely used in power distribution systems, transformers, motors, and other electrical equipment, and are characterized by their simple structure, low cost, and fast response speed.

[0003] For example, authorization announcement number CN213277994U discloses a solid-sealed fuse tube, including a tube body, an end cap, and a linkage mechanism. The linkage mechanism is installed on the end cap, and the end cap and one end of the tube body are interlocked. A notch is opened on one side of the tube body, and a connector is threaded inside the notch. A pentagonal claw is fixedly installed at one end of the connector inside the tube body. Several evenly spaced mounting grooves are opened on the inner side of the tube body. An elastic sheet made of insulating material is fixedly installed at one end of the mounting groove near the end cap. A fixing groove is opened inside the tube body, located between the mounting groove and the end cap. A conductive ring is fixedly installed inside the fixing groove. A connecting hole is opened on the outer arc surface of the tube body, and a conductive connecting rod is installed inside the connecting hole. The conductive connecting rod and the conductive ring are in contact with each other. This utility model has a reasonable structure and has the advantages of allowing the fuse tube to be directly installed inside the fuse tube without subsequent adjustment, making it simple and convenient to use.

[0004] In the above-mentioned technology, the fuse tube and the end cap are fixed by a snap-fit. Since the fuse tube is used in a high-humidity environment, the sealing performance of the snap-fit ​​method is poor. Moisture in the environment can easily enter the fuse tube and cause discharge or short circuit faults. Therefore, the market urgently needs to develop a fuse tube for high-humidity environments to help people solve the existing problems. Utility Model Content

[0005] The purpose of this utility model is to provide a fuse tube for high humidity environments, so as to solve the problem mentioned in the background art that the fuse tube body and end cap are fixed by snap-fit. Since the fuse tube is used in a high humidity environment, the sealing performance is poor by snap-fit ​​alone, and the moisture in the environment can easily enter the fuse tube and cause discharge or short circuit faults.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a fuse tube for high humidity environments, comprising a tube body, a connector fixedly connected to the middle of one end face of the tube body, an annular sealing slot provided on the end face of the tube body away from the connector, a sealing ring inserted inside the annular sealing slot, sealing rings fixedly connected to both sides of the sealing ring, an end cap inserted inside the tube body at the end away from the connector, a release pin provided in the middle of the end cap, a fixing ring fixedly connected to one end of the end cap extending out of one end face of the tube body, a pressure ring fixedly connected to the side face of the fixing ring adjacent to the tube body, and a screw cap rotatably provided on the outside of the fixing ring.

[0007] Preferably, one end of the connector extends into the inside of the tube and is fixedly connected to a plum blossom-shaped claw, and a conductive ring is fixedly connected to one side of the middle part of the tube.

[0008] Preferably, a conductive connecting rod is fixedly connected to one side of the lower middle part of the tube body, and the upper end of the conductive connecting rod is inserted into the tube body and fixedly connected to the conductive ring.

[0009] Preferably, an annular groove is provided on the other side of the middle part of the tube body, and multiple arc-shaped elastic support bars are fixedly connected in an annular array on both sides of the middle part of the annular groove, with the middle part of each arc-shaped elastic support bar protruding into the annular groove.

[0010] Preferably, both sealing rings have annular air chambers inside, and one side of the top pressure ring is inserted into the annular sealing slot.

[0011] Preferably, an external threaded portion is fixedly provided on the outer wall of the tube adjacent to the cap, and an internal threaded portion is fixedly connected to the inner wall of the cap.

[0012] Preferably, the cap is fitted onto one side of the outer wall of the tube and fixed by a threaded connection between the external thread and the internal thread.

[0013] Compared with the prior art, the beneficial effects of this utility model are: (1) In this utility model, by setting an annular sealing slot, a sealing ring and a double sealing ring structure with an annular air cavity, combined with the screw cap thread fastening method, a double pressure seal between the tube body and the end cap is achieved, which significantly improves the moisture-proof performance of the fuse tube in a high humidity environment and effectively prevents discharge or short circuit faults caused by moisture intrusion.

[0014] (2) In this utility model, the design of setting an arc-shaped elastic support strip in the annular groove provides multiple elastic supports during the installation of the fuse tube, ensuring that the fuse tube is centered in the cylinder, avoiding poor contact or partial discharge problems caused by offset, and simplifying the installation process.

[0015] (3) In this utility model, the integrated design of the screw cap and the threaded fastening structure ensures that the installation of the end cap maintains ease of operation, achieves reliable mechanical fixation and long-lasting sealing, solves the problem of insufficient sealing of the traditional snap-fit ​​method, and extends the service life of the fuse tube in harsh environments. Attached Figure Description

[0016] Figure 1 This is a front view of a fuse tube for high humidity environments according to this utility model; Figure 2 This is a front sectional view of the present invention; Figure 3 This is a side sectional view of the annular groove of this utility model; Figure 4 This is a detailed enlarged view of part A of this utility model.

[0017] In the diagram: 1. Pipe body; 101. Annular groove; 102. Connector; 103. Plum blossom claw; 104. Conductive ring; 105. Conductive connecting rod; 106. Annular sealing slot; 107. External thread; 2. Arc-shaped elastic support bar; 3. End cap; 301. Release pin; 302. Fixing ring; 303. Top pressure ring; 4. Sealing ring; 401. Sealing ring; 402. Annular air chamber; 5. Screw cap; 501. Internal thread. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0019] Please see Figure 1-4This utility model provides an embodiment of a fuse tube for high humidity environments, comprising a tube body 1, a connector 102 fixedly connected to the middle of one end face of the tube body 1, and an annular sealing slot 106 provided on the end face of the tube body 1 away from the connector 102. A sealing ring 4 is inserted into the annular sealing slot 106, and sealing rings 401 are fixedly connected to both sides of the sealing ring 4. An annular air cavity 402 is provided inside each of the two sealing rings 401. The tube body 1 is located on the side away from the connector 102. An end cap 3 is inserted into the tube body 1. A release pin 301 is provided in the middle of the end cap 3. One end of the end cap 3 extends out of one side of the tube body 1 and is fixedly connected to a fixing ring 302. A pressure ring 303 is fixedly connected to the side of the fixing ring 302 adjacent to the tube body 1. A screw cap 5 is rotatably provided on the outside of the fixing ring 302. One side of the pressure ring 303 is inserted into the annular sealing slot 106. An external thread 107 is fixedly provided on the outer wall of the tube body 1 adjacent to the screw cap 5. An inner thread 107 is fixedly connected to the inner wall of the screw cap 5. The threaded portion 501 and the cap 5 are fitted onto one side of the outer wall of the tube body 1 and are threadedly connected and fixed to the internal threaded portion 501 through the external threaded portion 107. One end of the end cap 3 is pre-inserted into one side of the inner wall of the tube body 1. When the cap 5 is rotated and threadedly connected and fixed to the outer wall of the tube body 1, the cap 5 gradually drives the fixing ring 302 to move, thereby driving the end cap 3 to gradually extend into the inner wall of the tube body 1 to achieve fixation. When the fixing ring 302 moves, it drives the top pressure ring 303 to insert into the annular sealing slot 106. When the top pressure ring 303 gradually inserts into the annular sealing slot 106, it squeezes the sealing ring 401 on one side of the sealing ring 4, thereby causing the sealing ring 401 on the other side of the sealing ring 401 to fit against the side wall of the annular sealing slot 106. The fixing ring 302 drives the top pressure ring 303 to continue to gradually extend into the annular sealing slot 106, causing the two sealing rings 401 to deform and contract through the annular air cavity 402, thereby achieving pressure sealing between the annular sealing slot 106 and the top pressure ring 303, thereby achieving a seal between the tube body 1 and the end cap 3.

[0020] Please see Figure 2 and Figure 3 One end of the connector 102 extends into the inside of the tube body 1 and is fixedly connected to a plum blossom claw 103. A conductive ring 104 is fixedly connected to one side of the middle part of the inside of the tube body 1. A conductive connecting rod 105 is fixedly connected to one side of the middle part of the lower end of the tube body 1. The upper end of the conductive connecting rod 105 is inserted into the inside of the tube body 1 and is fixedly connected to the conductive ring 104. An annular groove 101 is provided on the other side of the middle part of the inside of the tube body 1. Multiple arc-shaped elastic support bars 2 are fixedly connected in an annular array on both sides of the middle part of the annular groove 101. The middle part of each arc-shaped elastic support bar 2 protrudes into the inside of the annular groove 101. Before the end cap 3 is inserted into the tube body 1, the fuse tube is inserted into the inside of the tube body 1. After one end of the fuse tube is inserted, it passes through the middle part of the multiple arc-shaped elastic support bars 2 in the annular array and is inserted into the plum blossom claw 103 for connection. The multiple arc-shaped elastic support bars 2 support the middle part of the outer wall of the fuse tube, so that the fuse tube is in the center position after being inserted into the inside of the tube body 1.

[0021] Working principle: In use, the fuse tube is first inserted into the tube body 1, with one end passing through the central support area of ​​the multiple arc-shaped elastic support bars 2 in the annular array within the annular groove 101, and then inserted into the plum blossom claw 103 to achieve electrical connection. The elastic support of the multiple arc-shaped elastic support bars 2 keeps the fuse tube centered. Then, the end cap 3 is inserted into the open end of the tube body 1, and by rotating the cap 5, its internal thread 501 is screwed along the external thread 107 of the tube body 1, causing the fixing ring 302 and the top pressure ring 303 to move towards the tube body 1. As the top pressure ring 303 is gradually pressed into the annular sealing slot 106, it first squeezes the sealing ring 401 on one side of the sealing ring 4, and then the compression deformation of the annular air cavity 402 causes both sealing rings 401 to form a tight pressure contact with the annular sealing slot 106, ultimately forming a double annular airtight barrier between the top pressure ring 303 and the sealing ring 4. This structure effectively prevents moisture from seeping into the tube body in high humidity environments. At the same time, the threaded fastening method of the cap 5 ensures the stable fixation of the end cap 3 and the long-term maintenance of the sealing pressure, thereby ensuring the safe operation of the fuse tube in humid environments.

[0022] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A fuse tube for high humidity environments, comprising a tube body (1), characterized in that: A connector (102) is fixedly connected to the middle of one end face of the tube body (1). An annular sealing slot (106) is provided on the end face of the tube body (1) away from the connector (102). A sealing ring (4) is inserted inside the annular sealing slot (106). Sealing rings (401) are fixedly connected to both sides of the sealing ring (4). An end cap (3) is inserted into the end of the tube body (1) away from the connector (102). A release pin (301) is provided in the middle of the end cap (3). One end of the end cap (3) extends out of one end face of the tube body (1) and is fixedly connected to a fixing ring (302). A top pressure ring (303) is fixedly connected to the end face of the fixing ring (302) adjacent to the tube body (1). A screw cap (5) is rotatably provided on the outside of the fixing ring (302).

2. The fuse tube for high humidity environments according to claim 1, characterized in that: One end of the connector (102) extends into the inside of the tube (1) and is fixedly connected to a plum blossom claw (103). A conductive ring (104) is fixedly connected to one side of the middle part inside the tube (1).

3. The fuse tube for high humidity environments according to claim 1, characterized in that: A conductive connecting rod (105) is fixedly connected to one side of the lower middle part of the tube (1). The upper end of the conductive connecting rod (105) is inserted into the tube (1) and fixedly connected to the conductive ring (104).

4. The fuse tube for high humidity environments according to claim 1, characterized in that: An annular groove (101) is provided on the other side of the middle part of the tube body (1). Multiple arc-shaped elastic support bars (2) are fixedly connected in an annular array on both sides of the middle part of the annular groove (101). The middle part of each arc-shaped elastic support bar (2) protrudes into the annular groove (101).

5. A fuse tube for high humidity environments according to claim 1, characterized in that: Both of the sealing rings (401) have annular air chambers (402) inside, and one side of the top pressure ring (303) is inserted into the annular sealing slot (106).

6. The fuse tube for high humidity environments according to claim 1, characterized in that: The outer wall of the tube (1) is fixedly provided with an external thread (107) on the side adjacent to the cap (5), and the inner wall of the cap (5) is fixedly connected with an internal thread (501).

7. A fuse tube for high humidity environments according to claim 1, characterized in that: The cap (5) is fitted onto one side of the outer wall of the tube body (1) and fixed by threaded connection between the external thread (107) and the internal thread (501).

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