Underground cable joint waterproof box

Abstract

The utility model discloses an underground cable joint waterproof box, which belongs to the underground cable joint waterproof field and comprises an upper half box, a lower half box, an annular cavity, a sealant cavity, an inner flow channel, an elastic film, a connecting bolt, an upper pressing plate and a lower pressing plate. According to the utility model, the upper half box and the lower half box are buckled outside the joint part of the underground cable, then the upper pressing plate and the lower pressing plate are pressed on the upper half box and the lower half box, and the connecting bolts are screwed, so that the upper pressing plate and the lower pressing plate extrude the elastic film, the upper half box and the lower half box, and the upper half box and the lower half box are extruded into a whole. And after the elastic film is extruded, the sealant in the elastic film flows into the annular cavity from the sealant cavity through the inner flow channel for filling, so that the gap between the annular cavity and the underground cable is filled, and the sealing between the two ends of the upper half box and the lower half box and the underground cable is realized.

Description

Technical Field

[0001] The utility model relates to the field of waterproofing for underground cable joints, in particular to a waterproof box for underground cable joints. Background Technique

[0002] Underground cable joints are an indispensable part of underground cable networks for electricity, communication, etc. They are mainly used to connect two or more cables to ensure the continuous transmission of electrical energy or electrical signals. Such joints usually need to be fabricated on-site at specific underground locations during the cable laying process due to reasons such as line length adjustment, branch connection, and fault repair. Underground cable joints not only carry the tasks of high potential or high-speed data transmission, but the stability of their performance directly affects the operation safety and efficiency of the entire cable system.

[0003] The underground environment has complex characteristics such as high humidity, fluctuating groundwater levels, soil erosion, and the presence of chemical substances. These factors pose a serious threat to the electrical performance of cable joints. The intrusion of moisture may cause a significant decline in the insulation performance at the joint, leading to phenomena such as leakage, electro-corrosion, and partial discharge. In severe cases, it may result in a short-circuit fault, affecting power supply or communication quality. In addition, moisture may also accelerate the aging of cable joint materials, shorten their service life, increase maintenance costs, and potential safety hazards. Therefore, it is crucial to implement effective waterproof protection for underground cable joints.

[0004] The main waterproof methods for underground cable joints include: Wrapping with sealing tape: Using waterproof tapes (such as PVC tapes, self-adhesive waterproof tapes, etc.) to wrap around the joint and the surrounding cables layer by layer to form a physical barrier to prevent moisture penetration. However, this method relies on the long-term adhesiveness and sealing performance of the tape. Affected by soil pressure, temperature changes, and chemical substance erosion for a long time, the tape is prone to aging and cracking, resulting in a gradual weakening of the sealing effect. Plugging with cement mortar: Filling the area around the cable joint with cement mortar to form a hard protective layer. Although cement mortar has certain waterproof performance, cracks are easily generated during its curing process, and its adaptability to the thermal expansion and contraction of cable joints is poor. After long-term use, the cracks may expand, and moisture may seep in through them. In addition, the operation of plugging with cement mortar is cumbersome and not convenient for subsequent inspection and maintenance of the joint. Therefore, a waterproof box for underground cable joints that solves the above problems is needed. Content of the Utility Model

[0005] The purpose of the utility model is to solve the problems raised in the background technique and design a waterproof box for underground cable joints.

[0006] To achieve the above object, the technical solution of the present utility model is a waterproof box for underground cable joints, which includes an upper half box, a lower half box, an annular cavity, a sealant cavity, an inner flow channel, an elastic membrane, connecting bolts, an upper pressing plate, and a lower pressing plate. The lower part of the upper half box is attached to the lower half box. Annular cavities are opened on both sides of the upper half box and the lower half box. A sealant cavity is opened on the upper part of the upper half box. An inner flow channel is opened between the sealant cavity and the annular cavity. An elastic membrane is installed on the upper part of the sealant cavity. The upper pressing plate and the lower pressing plate are connected by connecting bolts, and the connecting bolts are located on the front and rear sides of the upper pressing plate and the lower pressing plate.

[0007] Further, a sealing film is provided at the opening part of the inner flow channel on the annular cavity, and the sealing film is attached to the inner flow channel part of the annular cavity.

[0008] Further, the upper pressing plate and the lower pressing plate are arc-shaped plate structures respectively corresponding to the shapes of the upper half box and the lower half box.

[0009] Further, the middle part of the structure formed by the upper half box and the lower half box is a cylindrical cavity structure.

[0010] Further, both sides of the structure surrounded by the upper half box and the lower half box are cylindrical channel structures with a radius greater than or equal to the radius of the underground cable. Beneficial Effects

[0011] The present utility model provides a waterproof box for underground cable joints, which has the following beneficial effects. Through its structural design, the upper half box and the lower half box are buckled outside the joint part of the underground cable, and then the upper pressing plate and the lower pressing plate are pressed on the upper half box and the lower half box, and the connecting bolts are screwed. Further, the upper pressing plate and the lower pressing plate squeeze the elastic membrane, the upper half box and the lower half box. Further, the upper half box and the lower half box are squeezed into one body, and after the elastic membrane is squeezed, the sealant in it flows from the sealant cavity through the inner flow channel into the annular cavity for filling, thereby filling the gap between the annular cavity and the underground cable, and further achieving the seal between the two ends of the upper half box and the lower half box and the underground cable, and thus realizing the seal of the underground cable joint. Description of the Drawings

[0012] Figure 1 is a schematic cross-sectional structure view of the waterproof box for underground cable joints of the present utility model;

[0013] Figure 2 is a schematic external structure view of the waterproof box for underground cable joints of the present utility model.

[0014] In the figure, 1. upper half box; 2. lower half box; 3. annular cavity; 4. sealant cavity; 5. inner flow channel; 6. elastic membrane; 7. connecting bolts; 8. sealing film; 9. upper pressing plate; 10. lower pressing plate. Detailed Embodiment

[0015] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0016] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by terms such as "upper / lower end", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0017] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, terms such as "installed", "provided / sleeved with", "socketed", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0018] Please refer to Figure 1-2 , the present invention provides a technical solution: an underground cable joint waterproof box, which includes an upper half box 1, a lower half box 2, an annular cavity 3, a sealant cavity 4, an inner flow channel 5, an elastic membrane 6, connecting bolts 7, an upper pressing plate 9, and a lower pressing plate 10. The lower part of the upper half box 1 is attached to the lower half box 2. Annular cavities 3 are opened on both sides of the upper half box 1 and the lower half box 2. A sealant cavity 4 is opened on the upper part of the upper half box 1. An inner flow channel 5 is opened between the sealant cavity 4 and the annular cavity 3. An elastic membrane 6 is installed on the upper part of the sealant cavity 4. The upper pressing plate 9 and the lower pressing plate 10 are connected by connecting bolts 7, and the connecting bolts 7 are located on the front and rear sides of the upper pressing plate 9 and the lower pressing plate 10.

[0019] In the present invention, a sealing film 8 is provided at the opening part of the inner flow channel 5 on the annular cavity 3. The sealing film 8 is attached to the inner flow channel 5 part of the annular cavity 3, and the inner flow channel 5 is sealed by the sealing film 8 to prevent the sealant from solidifying in advance.

[0020] In the present utility model, the upper pressing plate 9 and the lower pressing plate 10 are arc-shaped plate structures respectively corresponding to the shapes of the upper half box 1 and the lower half box 2, thus facilitating the cooperation with the upper half box 1 and the lower half box 2.

[0021] In the present utility model, the middle part of the structure surrounded by the upper half box 1 and the lower half box 2 is a cylindrical cavity structure, thus accommodating the joint part of the ground wire cable.

[0022] In the present utility model, both sides of the structure surrounded by the upper half box and the lower half box 2 are cylindrical channel structures with a radius greater than or equal to the radius of the underground cable, thus facilitating the underground cable to pass through.

[0023] Through those skilled in the art, all the electrical components in this case are connected to their adapted power supplies through wires, and a suitable controller should be selected according to the actual situation to meet the control requirements. For the specific connection and control sequence, reference should be made to the sequence of the electrical components working successively in the following working principle to complete the electrical connection. The detailed connection means are well-known techniques in the art. The following mainly introduces the working principle and process, and no further description of the electrical control will be made.

[0024] In this implementation:

[0025] During use, first, the upper half box 1 and the lower half box 2 are buckled outside the joint part of the underground cable, then the upper pressing plate 9 and the lower pressing plate 10 are pressed on the upper half box 1 and the lower half box 2, and the connecting bolts 7 are screwed. Thus, the upper pressing plate 9 and the lower pressing plate 10 squeeze the elastic membrane 6, the upper half box 1 and the lower half box 2. Thus, the upper half box 1 and the lower half box 2 are squeezed into one body, and after the elastic membrane 6 is squeezed, the sealant inside it flows from the sealant cavity 4 through the inner flow channel 5 to the annular cavity 3 for filling, thus filling the gap between the annular cavity 3 and the underground cable, thus realizing the sealing between the two ends of the upper half box 1 and the lower half box 2 and the underground cable, and thus realizing the sealing of the underground cable joint.

[0026] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation. An element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0027] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. An underground cable joint waterproof box, comprising an upper half box (1), a lower half box (2), an annular cavity (3), a sealant cavity (4), an inner flow channel (5), an elastic membrane (6), connecting bolts (7), an upper pressing plate (9), and a lower pressing plate (10), characterized in that, The lower part of the upper half box (1) is attached to the lower half box (2). Annular cavities (3) are formed on both sides of the upper half box (1) and the lower half box (2). A sealant cavity (4) is formed in the upper part of the upper half box (1). An internal flow channel (5) is formed between the sealant cavity (4) and the annular cavity (3). An elastic membrane (6) is installed in the upper part of the sealant cavity (4). The upper pressing plate (9) and the lower pressing plate (10) are connected by connecting bolts (7), and the connecting bolts (7) are located on the front and rear sides of the upper pressing plate (9) and the lower pressing plate (10).

2. The waterproof box for underground cable joints according to claim 1, characterized in that, A sealing film (8) is provided at the opening part of the internal flow channel (5) on the annular cavity (3), and the sealing film (8) is attached to the part of the internal flow channel (5) of the annular cavity (3).

3. The waterproof box for underground cable joints according to claim 1, characterized in that, The upper pressing plate (9) and the lower pressing plate (10) are arc-shaped plate structures corresponding to the shapes of the upper half box (1) and the lower half box (2) respectively.

4. The waterproof box for underground cable joints according to claim 1, characterized in that The middle part of the structure formed by the upper half box (1) and the lower half box (2) is a cylindrical cavity structure.

5. The waterproof box for underground cable joints according to claim 1, characterized in that Both sides of the structure surrounded by the upper half box and the lower half box (2) are cylindrical channel structures with a radius greater than or equal to the radius of the underground cable.

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