Flame-retardant terminal sheath

Abstract

The utility model relates to the technical field of terminal sheaths, in particular to a flame-retardant terminal sheath, which comprises a left terminal sheath and a right terminal sheath, a first sealing ring is arranged between a left shell and a right shell, extrusion teeth are arranged at one end, far away from the first sealing ring, of the left shell, a second sealing ring is in contact with the inner side surface of the extrusion teeth, and the second sealing ring is in contact with the inner side surface of the extrusion teeth. The inner side surface of the end cap abuts against the outer side surface of the extrusion tooth, and the insulating drying agent is fixedly connected with the inner side wall of the left shell through the asbestos layer. The second sealing ring is extruded by the end cap to form sealing with the outer surface of the cable, and the internal insulating drying agent absorbs a small amount of water vapor entering the terminal sheath, so that the interior of the terminal sheath is kept dry, the contact between the terminal and the water vapor is reduced, and water leakage at the terminal or corrosion caused by too humid environment is avoided.

Description

Technical Field

[0001] The utility model relates to a terminal sheath, in particular to a flame-retardant terminal sheath, belonging to the technical field of terminal sheaths. Background Technique

[0002] In the field of electrical connection, a terminal sheath is a commonly used accessory for protecting the connection part of a terminal and a wire from the influence of the external environment. However, when a wiring terminal generates heat due to reasons such as electric leakage, short circuit, overload, arc, and poor contact, it is prone to burning at high temperatures, resulting in electrical equipment failures and even fire accidents.

[0003] Existing flame-retardant terminal sheaths are usually made of flame-retardant plastics. During a fire, the terminal sheath itself may not burn, but when wiring outdoors, the terminal sheath sometimes is in a humid environment. When the terminal is in a humid environment for a long time, the metal inside the terminal is prone to corrosion, reducing the service life of the terminal. Especially on rainy days, the outdoor terminal is extremely prone to water ingress and electric leakage, causing circuit damage.

[0004] Therefore, it is urgent to improve the flame-retardant terminal sheath to solve the above existing problems. Content of the Utility Model

[0005] The purpose of the utility model is to provide a flame-retardant terminal sheath. By threadedly connecting the left terminal sheath and the right terminal sheath, after tightening, the end face squeezes the first sealing ring to form a seal at the end face connection. The end cap squeezes the second sealing ring, and the second sealing ring forms a seal with the outer surface of the cable. The internal insulating desiccant absorbs a small amount of water vapor entering the terminal sheath, so as to keep the inside of the terminal sheath dry, reduce the contact between the terminal and the water vapor, and thus prevent water ingress and electric leakage at the terminal or corrosion due to an overly humid environment.

[0006] To achieve the above object, the main technical solutions adopted by the present utility model include: including a left terminal sheath and a right terminal sheath, characterized in that: the left terminal sheath and the right terminal sheath are threadedly connected; the left terminal sheath includes an end cap, an asbestos layer, an insulating desiccant, and a left housing; the right terminal sheath includes the end cap, the asbestos layer, the insulating desiccant, and a right housing symmetrically arranged with the left terminal sheath; a first sealing ring is provided between the left housing and the right housing; a baffle is fixedly connected to one side of the inner surface of the left housing near the internal thread; a plurality of extrusion teeth are fixedly connected to the surface of the baffle on the side close to the internal thread; the plurality of extrusion teeth are evenly distributed along the inner circle of the baffle; a first boss is provided at the top of each of the plurality of extrusion teeth, and the first boss extends towards the center of the baffle; a second sealing ring is provided between the first boss, the extrusion teeth, and the baffle; a wire passing hole is provided at the center of one end surface of the end cap, and the second sealing ring is fixedly connected to the left housing through the baffle; the end cap is threadedly connected to one end of the left housing close to the extrusion teeth; the inner surface of the end cap abuts against the outer surface of the extrusion teeth; the insulating desiccant is fixedly connected to the inner side wall of the left housing through the asbestos layer.

[0007] Preferably, the asbestos layer includes a bottom surface, an outer sleeve, an inner protective net, and a partition; the bottom surface is fixedly connected to one side surface of the baffle; the outer sleeve is fixedly connected to the other side of the bottom surface; the partitions are evenly distributed on the inner surface of the outer sleeve; one side of the partition is fixedly connected to the inner surface of the sleeve; the other side of the partition is fixedly connected to the inner protective net; one end of the inner protective net is fixedly connected to the bottom surface; the other end of the inner protective net is flush with the end surface of the left housing; a desiccant cavity is formed between every two adjacent partitions, and the insulating desiccant is filled in the desiccant cavity.

[0008] Preferably, the inner diameter of the inner protective net is greater than the diameter of the wire passing hole, and the inner diameter of the second sealing ring is equal to the diameter of the wire passing hole.

[0009] Preferably, a plurality of water retaining grooves are formed on the inner wall of the second sealing ring, the plurality of water retaining grooves all surround the sealing ring, and the plurality of water retaining grooves are axially distributed along the second sealing ring.

[0010] Preferably, anti-slip stripes are provided on the outer surfaces of the end cap, the left housing, and the right housing.

[0011] Preferably, one end of the inner protective net is fixedly connected to the bottom surface, the other end of the inner protective net is flush with the end surface of the left housing, and the inner protective net is a porous breathable structure.

[0012] The present utility model has at least the following beneficial effects:

[0013] 1. By threadedly connecting the left terminal sheath and the right terminal sheath, after tightening, the end face squeezes the first sealing ring to form a seal at the end face connection. The end cap squeezes the second sealing ring, and the second sealing ring forms a seal with the outer surface of the cable. The internal insulating desiccant absorbs a small amount of water vapor that enters the terminal sheath, thereby keeping the inside of the terminal sheath dry, reducing the contact between the terminal and water vapor, and thus preventing water ingress and leakage at the terminal or corrosion due to excessive humidity in the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The drawings described herein are used to provide a further understanding of the present application and form a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation of the present application. In the drawings:

[0015] Figure 1 is an isometric structural schematic diagram provided by the present utility model;

[0016] Figure 2 is an isometric structural schematic diagram of the left terminal sheath provided by the present utility model;

[0017] Figure 3 is an isometric structural schematic diagram of the right terminal sheath provided by the present utility model;

[0018] Figure 4 is an internal structural schematic diagram of the left terminal sheath provided by the present utility model;

[0019] Figure 5 is a sectional view provided by the present utility model.

[0020] Figure 6 is an isometric structural schematic diagram of the asbestos layer provided by the present utility model

[0021] In the figures, 1. Left terminal sheath; 2. End cap; 3. Asbestos layer; 4. Insulating desiccant; 5. Left housing; 6. Baffle; 7. Extrusion teeth; 8. First boss; 9. Second sealing ring; 10. Wire threading hole; 11. Second boss; 12. Right terminal sheath; 13. Right housing; 14. First sealing ring; 15. Bottom surface; 16. Outer sleeve; 17. Inner protective net; 18. Partition; 19. Desiccant chamber; 20. Water retaining groove; 21. Anti-slip stripes. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The following will detail the embodiments of the present application in conjunction with the drawings and embodiments, so as to fully understand how the present application uses technical means to solve technical problems and achieve the realization process of technical effects and implement accordingly.

[0023] As Figures 1-6As shown in the figure, the flame-retardant terminal sheath provided in this embodiment includes a left terminal sheath 1 and a right terminal sheath 12. The left terminal sheath 1 includes an end cap 2, an asbestos layer 3, an insulating desiccant 4, and a left housing 5. One end of the left housing 5 is provided with an external thread and the other end is provided with an internal thread. The end of the left housing 5 with the internal thread is threadedly connected to the end cap 2. The inner surface of the end cap 2 is a conical shape that is wider on the outside and narrower on the inside. One side of the inner surface of the left housing 5 near the internal thread is fixedly connected with a baffle 6. A plurality of extrusion teeth 7 are fixedly connected to the surface of the baffle 6 on the side close to the internal thread. The plurality of extrusion teeth 7 are evenly distributed along the inner circle of the baffle 6. A first boss 8 is provided at the top of each of the plurality of extrusion teeth 7. The first boss 8 extends towards the center of the baffle 6. A second sealing ring 9 is provided between the first boss 8, the extrusion tooth 7, and the baffle 6. A wire passing hole 10 is provided at the center of one end surface of the end cap 2. The wire passing hole 10 penetrates through the end cap 2. A second boss 11 is provided at the position of the inner bottom surface 15 of the end cap 2 near the wire passing hole 10. When the end cap 2 is tightened, the second boss 11 squeezes the second sealing ring 9, and the inner surface of the end cap 2 squeezes the outer side of the extrusion tooth 7. The extrusion tooth 7 converges inward to squeeze the second sealing ring 9. The inner surface of the left housing 5 is fixedly connected to the outer surface of the asbestos layer 3. One end of the asbestos layer 3 is fixedly connected to the surface of the baffle 6 away from the internal thread. The asbestos layer 3 is filled with an insulating desiccant 4 inside. The right terminal sheath 12 includes an end cap 2, a second sealing ring 9, an asbestos layer 3, and an insulating desiccant 4 that are symmetrically arranged with the left terminal sheath 1. And the right terminal sheath 12 includes a right housing 13. The left housing 5 and the right housing 13 are threadedly connected. A first sealing ring 14 is provided between the end faces of the right housing 13 and the left housing 5. The left terminal sheath 1 and the right terminal sheath 12 are sleeved on the cable. After the cable is connected with a terminal, the left terminal sheath 1 and the right terminal sheath 12 are threadedly connected. After tightening, the end faces of the right housing 13 and the left housing 5 squeeze the first sealing ring 14 to form a seal at the connection of the left terminal sheath 1 and the right terminal sheath 12. The end cap 2 is tightened. The inner end face of the end cap 2 squeezes the second sealing ring 9. At the same time, the extrusion tooth 7 also squeezes the second sealing ring 9. The inner diameter of the second sealing ring 9 is equal to that of the cable. Under the action of the end cap 2 and the extrusion tooth 7, it deforms to form a seal with the outer surface of the cable. The insulating desiccant 4 filled inside the asbestos layer 3 absorbs a small amount of water vapor that enters the inside of the terminal sheath, keeping the inside of the terminal sheath dry, reducing the contact between the terminal and the water vapor, and thus preventing water ingress and leakage at the terminal or corrosion due to excessive humidity in the environment.

[0024] Further, as Figure 4 and Figure 6As shown in the figure, the asbestos layer 3 includes a bottom surface 15, an outer sleeve 16, an inner protective net 17, and a partition 18. The bottom surface 15 is fixedly connected to one side surface of the baffle 6, the outer sleeve 16 is fixedly connected to the other side of the bottom surface 15. The partitions 18 are evenly distributed on the inner surface of the outer sleeve 16. One side of the partition 18 is fixedly connected to the inner surface of the sleeve, and the other side of the partition 18 is fixedly connected to the inner protective net 17. One end of the inner protective net 17 is fixedly connected to the bottom surface 15, and the other end of the inner protective net 17 is flush with the end face of the left housing 5. A desiccant chamber 19 is formed between two adjacent partitions 18. The desiccant chamber 19 is filled with an insulating desiccant 4. The partitions 18 divide the interior of the asbestos layer 3 into multiple desiccant chambers 19, which facilitates the filling and fixing of the desiccant. The inner protective net 17 protects the desiccant to prevent the terminals from contacting the desiccant and damaging the dryer. Moreover, the inner protective net 17 has multiple mesh holes, which allows the desiccant to adsorb the internal water vapor.

[0025] Furthermore, as Figure 4 and Figure 6 shown, the inner diameter of the protective net is greater than the diameter of the wire passing hole 10, and the inner diameter of the second sealing ring 9 is equal to the diameter of the wire passing hole 10. The space inside the protective net is sufficient to accommodate the wiring terminals.

[0026] Among them, as Figure 5 shown, a plurality of water retaining grooves 20 are formed on the inner wall of the second sealing ring 9. The plurality of water retaining grooves 20 all surround the sealing ring for one week, and the plurality of water retaining grooves 20 are axially distributed along the second sealing ring 9. When in an overly humid environment, the water vapor will first enter the water retaining grooves 20, thereby delaying the time for the water vapor to enter the interior.

[0027] Among them, as Figure 1 shown, anti-slip stripes 21 are provided on the outer surfaces of the end cap 2, the left housing 5, and the right housing 13. The anti-slip stripes 21 facilitate the worker to tighten by hand and are convenient for the worker to operate.

[0028] Among them, as Figure 1 shown, the end cap 2, the left housing 5, and the right housing 13 are all made of flame-retardant plastic. When the internal terminals catch fire due to a fault, the housing will not burn, and the flame will go out after the internal air is consumed.

[0029] As Figures 1-6As shown in the figure, the principle of the flame-retardant terminal sheath provided in this embodiment is as follows: The left terminal sheath 1 and the right terminal sheath 12 are sleeved on the cable. After the cable is connected with the terminal, the left terminal sheath 1 and the right terminal sheath 12 are connected by threads. After tightening, the end face of the right housing 13 and the left housing 5 squeezes the first sealing ring 14 to form a seal at the connection of the left terminal sheath 1 and the right terminal sheath 12. The end cap 2 is tightened. The inner end face of the end cap 2 squeezes the second sealing ring 9. At the same time, the extrusion tooth 7 also squeezes the second sealing ring 9. The inner diameter of the second sealing ring 9 is equal to that of the cable and deforms under the action of the end cap 2 and the extrusion tooth 7 to form a seal with the outer surface of the cable. Anti-slip stripes 21 are provided on the outer surfaces of the end cap 2, the left housing 5, and the right housing 13. The anti-slip stripes 21 facilitate the worker to tighten by hand, which is convenient for the worker to operate. The insulating desiccant 4 filled in the asbestos layer 3 absorbs a small amount of water vapor entering the inside of the terminal sheath, keeping the inside of the terminal sheath dry, reducing the contact between the terminal and the water vapor, thereby preventing water ingress and leakage at the terminal or corrosion due to excessive humidity in the environment. The partition 18 divides the inside of the asbestos layer 3 into multiple desiccant chambers 19, which facilitates the filling and fixing of the desiccant. The inner protective net 17 protects the desiccant, preventing the terminal from contacting the desiccant and damaging the dryer. Moreover, the inner protective net 17 has multiple mesh holes, enabling the desiccant to adsorb the internal water vapor. The inner diameter of the inner protective net 17 is larger than the diameter of the wire passing hole 10, so that the space inside the protective net is sufficient to accommodate the terminal. Multiple water retaining grooves 20 are provided on the inner wall of the second sealing ring 9. The multiple water retaining grooves 20 all surround the sealing ring for one week, and the multiple water retaining grooves 20 are distributed along the axial direction of the second sealing ring 9. When in an overly humid environment, the water vapor will first enter the water retaining grooves 20, thereby delaying the time for the water vapor to enter the inside. The end cap 2, the left housing 5, and the right housing 13 are all made of flame-retardant plastic. When the internal terminal catches fire due to a fault, the housing will not burn, and the flame will go out after the internal air is consumed.

[0030] As used in the specification and claims, certain terms are used to refer to specific components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. The specification and claims do not use the difference in name as a way to distinguish components, but use the difference in function of components as the criterion for distinction. As mentioned throughout the specification and claims, "comprising" is an open-ended term and should be interpreted as "including but not limited to". "Substantially" means within an acceptable error range. Those skilled in the art can solve technical problems within a certain error range and basically achieve the technical effect.

[0031] It should be noted that the term "comprising", "including" or any other variation thereof is intended to cover non-exclusive inclusion, so that a commodity or system comprising a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such commodity or system. Without further limitation, an element defined by the statement "comprising an..." does not exclude the existence of additional identical elements in the commodity or system comprising the element.

[0032] The above description shows and describes several preferred embodiments of the present invention. However, as mentioned above, it should be understood that the present invention is not limited to the forms disclosed herein, and should not be regarded as excluding other embodiments. Instead, it can be used in various other combinations, modifications and environments, and can be modified within the scope of the inventive concept described herein through the above teachings or the technology or knowledge in the relevant field. Any modifications and changes made by those skilled in the art without departing from the spirit and scope of the present invention shall fall within the protection scope of the appended claims of the present invention.

Claims

1. A flame retardant terminal sheath, comprising a left terminal sheath (1) and a right terminal sheath (12), characterized in that: The left terminal sheath (1) is threadedly connected to the right terminal sheath (12); the left terminal sheath (1) comprises an end cap (2), an asbestos layer (3), an insulating desiccant (4) and a left shell (5); the right terminal sheath (12) comprises the end cap (2), the asbestos layer (3), the insulating desiccant (4) and a right shell (13) which are symmetrically arranged with the left terminal sheath (1); a No. 1 sealing ring (14) is arranged between the left shell (5) and the right shell (13); a baffle (6) is fixedly connected to one side of the inner surface of the left shell (5) close to the internal thread; a plurality of extrusion teeth (7) are fixedly connected to the surface of the baffle (6) close to the internal thread; the plurality of extrusion teeth (7) are arranged along the baffle (6) The inner circle is evenly distributed, and a No. 1 boss (8) is provided on the top of each of the plurality of extrusion teeth (7). The No. 1 boss (8) extends toward the center of the baffle (6). A No. 2 sealing ring (9) is provided between the No. 1 boss (8), the extrusion teeth (7) and the baffle (6). A threading hole (10) is provided at the center of the surface of one end of the end cap (2), and the No. 2 sealing ring (9) is fixedly connected to the left shell body (5) through the baffle (6). The end cap (2) is threadedly connected to one end of the left shell body (5) close to the extrusion teeth (7), and the inner surface of the end cap (2) is in conflict with the outer surface of the extrusion teeth (7). The insulating desiccant (4) is fixedly connected to the inner wall of the left shell body (5) through the asbestos layer (3).

2. The flame-retardant terminal sheath according to claim 1, characterized in that: The asbestos layer (3) comprises a bottom surface (15), an outer sleeve (16), an inner protective net (17) and a partition (18); the bottom surface (15) is fixedly connected to the baffle (6); the outer sleeve (16) is fixedly connected to the other side of the bottom surface (15); the partition (18) is evenly distributed on the inner surface of the outer sleeve (16); one side of the partition (18) is fixedly connected to the inner surface of the outer sleeve (16); the other side of the partition (18) is fixedly connected to the inner protective net (17); a desiccant cavity (19) is formed between every two adjacent partitions (18); the desiccant cavity (19) is filled with the insulating desiccant (4).

3. The flame-retardant terminal sheath according to claim 2, characterized in that: The inner diameter of the inner protection net (17) is greater than the diameter of the threading hole (10), and the inner diameter of the No. 2 sealing ring (9) is equal to the diameter of the threading hole (10).

4. The flame-retardant terminal sheath according to claim 1, characterized in that: The inner wall of the No. 2 sealing ring (9) is provided with a plurality of water retaining grooves (20), each of which surrounds the No. 2 sealing ring (9) and is distributed axially along the No. 2 sealing ring (9).

5. The flame-retardant terminal sheath according to claim 1, characterized in that: The outer surfaces of the end cap (2), the left shell (5) and the right shell (13) are all provided with anti-slip stripes (21).

6. The flame-retardant terminal sheath according to claim 2, characterized in that: One end of the inner protective net (17) is fixedly connected to the bottom surface (15), and the other end of the inner protective net (17) is flush with the end surface of the left shell body (5). The inner protective net (17) is a porous air-permeable structure.

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