An explosion-proof box for a cable

Abstract

The utility model discloses a cable explosion -proof box belongs to cable equipment technical field, including mounting spare and glue injection spare, two mounting spares can be relatively buckled and detachable connection to form explosion -proof box body, and the inside of explosion -proof box body forms sealed cavity, and the both ends of sealed cavity are provided with fixed line passageway, and fixed line passageway one end communicates sealed cavity, and the other end communicates outside, and fixed line passageway and sealed cavity coaxial setting, glue injection spare fixed connection in any mounting spare, and the glue injection passageway of being through being provided on glue injection spare, and glue injection passageway communicates sealed cavity with outside, is used to inject solidified explosion -proof glue in sealed cavity. The cable explosion -proof box through the design of mounting spare and glue injection spare, has realized the assembly of cable explosion -proof box convenientization and has dismantled, has effectively promoted the sealing and explosion -proof performance to cable and junction box interface, has guaranteed the stable safe operation of cable and related equipment.

Description

Technical Field

[0001] This utility model relates to the field of cable equipment technology, and in particular to a cable explosion-proof box. Background Technology

[0002] A cable is an electrical or signal transmission device, typically composed of several or groups of conductors. It is widely used in power systems, communication networks, industrial automation, and other fields to achieve power transmission and signal delivery, and is a key component ensuring the normal operation of various electrical equipment and systems. A junction box is used to connect and secure cables, enabling connections and distribution between different lines and the access of equipment. Cables are routed through junction boxes to achieve a rational layout and functional expansion of the wiring.

[0003] In actual use, the presence of moisture, dust, corrosive gases in the external environment, as well as the risk of flammability and explosion in some locations, can cause a decrease in the insulation performance of cables, damage to components inside junction boxes, and safety accidents. Therefore, it is necessary to seal the interface between the cable and the junction box.

[0004] In existing technologies, gland heads are mainly used for sealing the interface between cables and junction boxes. The sealing principle of a gland head is that tightening its locking nut causes the rubber sealing ring inside the gland head to deform, thereby tightly fitting the outer surface of the cable. At the same time, the gland head also achieves a tight connection with the opening of the junction box, thus preventing the ingress of external substances and achieving the function of sealing the interface.

[0005] However, cable glands have poor adaptability to different cable specifications. Each cable specification often requires a specific cable gland specification. When multiple cable specifications are involved in practical applications, this not only increases procurement and management costs but may also lead to poor sealing due to improper selection. In addition, installing or replacing cable glands requires shutting down the relevant equipment and disassembling the cables to install the glands, which is inefficient and costly. Utility Model Content

[0006] The purpose of this utility model is to provide a cable explosion-proof box to solve the technical problems of poor adaptability and difficulty in disassembly and assembly of existing cable explosion-proof boxes.

[0007] Based on the above concept, the technical solution adopted by this utility model is as follows:

[0008] An explosion-proof cable box, comprising:

[0009] Two mounting pieces are able to be snapped together and detachably connected to form an explosion-proof box body. The explosion-proof box body has a sealed cavity inside. A wire fixing channel is provided at both ends of the sealed cavity. One end of the wire fixing channel is connected to the sealed cavity and the other end is connected to the outside. The wire fixing channel and the sealed cavity are coaxially arranged.

[0010] An injection component is fixedly connected to any of the aforementioned mounting components. An injection channel is provided through the injection component, which connects the sealing cavity to the outside and is used to inject cured explosion-proof adhesive into the sealing cavity.

[0011] Preferably, the two mounting components are connected by one of the following methods: magnetic connection, bolt connection, or snap-fit ​​connection.

[0012] Preferably, the two mounting components are connected by bolts. Each mounting component has a connecting through hole at each of its four corners, and the connecting through holes of the two mounting components correspond one-to-one. The locking bolts can be threaded into the corresponding two connecting through holes in sequence.

[0013] Preferably, the center of the mating surface of the mounting component is recessed inward to form a sealing groove, the radial cross-section of the sealing groove is semi-circular, and the sealing grooves of the two mounting components are engaged to form a cylindrical sealing cavity.

[0014] Preferably, the sides of the mating surface located at both ends of the sealing groove are recessed inward to form a wire-fixing groove. The radial cross-section of the wire-fixing groove is semi-circular, and the two wire-fixing grooves are engaged to form a cylindrical wire-fixing channel.

[0015] Preferably, the inner diameter of the sealing bottom groove is larger than the inner diameter of the fixing bottom groove, and a positioning protrusion is formed at the connection between the sealing bottom groove and the fixing bottom groove.

[0016] Preferably, in the two mounting components, one of the sealing grooves has a sealing strip on its outer periphery, and the other sealing groove has a corresponding positioning groove on its outer periphery, and the sealing strip can be embedded in the positioning groove.

[0017] Preferably, the axis of the glue injection channel is set at an angle to the axis of the sealing cavity, and the angle is greater than or equal to 30 degrees and less than or equal to 60 degrees.

[0018] Preferably, the end of the dispensing component away from the sealing cavity is detachably connected to a sealing cap, which is used to close or open the dispensing channel.

[0019] Preferably, the mounting component has external connectors at both ends, the external connectors are internally connected to the fixed cable channel, and the inner wall of the external connectors is provided with internal threads for threaded connection to external equipment; and / or, the outer wall of the external connectors is provided with external threads for threaded connection to the external equipment.

[0020] The beneficial effects of this utility model are:

[0021] The explosion-proof cable box proposed in this utility model features two mounting pieces that can be interlocked and detachably connected, making the box body easy to assemble and disassemble. During installation or replacement, there is no need to stop the operation of related equipment or disassemble the cable. Simply place the two mounting pieces opposite each other, position the cable between the cable-fixing channels of the two mounting pieces, ensure the cable is correctly positioned, and then interlock and fix the two mounting pieces to complete the installation, improving the convenience and efficiency of installation and maintenance. The explosion-proof box body forms a sealed cavity with cable-fixing channels coaxial with the sealed cavity at both ends. This allows the cable to be easily passed through the cable-fixing channels and placed inside the sealed cavity. The coaxial arrangement facilitates the smooth insertion and positioning of the cable, ensuring a good seal. An injection component is fixed to either mounting piece and has an injection channel running through it. Cured explosion-proof adhesive is injected into the sealed cavity through the injection channel, gradually filling the annular gap between the outer surface of the cable and the inner wall of the sealed cavity, while simultaneously penetrating into the microscopic gaps of the mounting piece's interlocking surface. The cured colloid forms an elastic sealing layer that tightly conforms to the cable's outer diameter and the contour of the sealing cavity. This compensates for cable dimensional tolerances and, through its density, prevents the intrusion of external moisture, dust, and flammable or explosive gases. Simultaneously, it provides explosion protection in locations with flammable or explosive risks, achieving excellent sealing and explosion-proof functions, effectively ensuring the stable and safe operation of cables and related equipment. In summary, this cable explosion-proof box, with its modular mounting components, allows for convenient assembly and disassembly. Furthermore, the design of injecting colloid into the sealing cavity effectively enhances the sealing and explosion-proof performance at the cable-junction box interface, ensuring the stable and safe operation of cables and related equipment. Attached Figure Description

[0022] Figure 1 This is a first sectional view of the mounting component provided in this embodiment of the utility model;

[0023] Figure 2 This is a top view of the mounting component provided in this embodiment of the utility model;

[0024] Figure 3 This is a front view of the mounting component provided in this embodiment of the utility model;

[0025] Figure 4 This is a first structural schematic diagram of the mounting component provided in this embodiment of the utility model;

[0026] Figure 5 This is a second sectional view of the mounting component provided in this embodiment of the utility model;

[0027] Figure 6 This is a second structural schematic diagram of the mounting component provided in this embodiment of the utility model;

[0028] Figure 7 This is a third structural schematic diagram of the mounting component provided in this embodiment of the utility model.

[0029] In the picture:

[0030] 1. Mounting component; 101. Sealing cavity; 102. Wire fixing channel; 11. Sealing bottom groove; 12. Wire fixing bottom groove; 13. Positioning flange; 14. Connecting through hole; 15. Sealing strip;

[0031] 2. Injection part; 21. Injection channel. Detailed Implementation

[0032] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0033] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0035] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0036] See Figures 1 to 7The explosion-proof cable box provided in this embodiment of the utility model includes a mounting component 1 and an injection component 2. There are two mounting components 1, which can be interlocked and detachably connected to form the explosion-proof box body. A sealed cavity 101 is formed inside the explosion-proof box body. A wire-fixing channel 102 is provided at each end of the sealed cavity 101. One end of the wire-fixing channel 102 connects to the sealed cavity 101, and the other end connects to the outside. The wire-fixing channel 102 and the sealed cavity 101 are coaxially arranged. The injection component 2 is fixedly connected to either mounting component 1. An injection channel 21 is provided through the injection component 2, connecting the sealed cavity 101 to the outside, for injecting cured explosion-proof adhesive into the sealed cavity 101.

[0037] The explosion-proof cable box proposed in this utility model features two mounting pieces 1 that can be interlocked and detachably connected, making the box body easy to assemble and disassemble. During installation or replacement, there is no need to stop the operation of related equipment or disassemble the cable. Simply place the two mounting pieces 1 opposite each other, position the cable between the cable-fixing channels 102 of the two mounting pieces 1, ensure the cable is correctly positioned, and then interlock and fix the two mounting pieces 1 together to complete the installation, improving the convenience and efficiency of installation and maintenance. The explosion-proof box body forms a sealed cavity 101, with cable-fixing channels 102 coaxial with the sealed cavity 101 at both ends. This allows the cable to be easily passed through the cable-fixing channels 102 and placed within the sealed cavity 101. The coaxial arrangement facilitates the smooth insertion and positioning of the cable, ensuring a good sealing effect. The injection component 2 is fixed to any of the mounting components 1, with an injection channel 21 extending through it. Cured explosion-proof adhesive is injected into the sealing cavity 101 through the injection channel 21, gradually filling the annular gap between the outer surface of the cable and the inner wall of the sealing cavity 101, while simultaneously penetrating into the microscopic gaps of the mating surface of the mounting component 1. The cured adhesive forms an elastic sealing layer that tightly conforms to the outer diameter of the cable and the contour of the sealing cavity 101, compensating for cable dimensional tolerances and preventing the intrusion of external moisture, dust, and flammable and explosive gases through its own density. Simultaneously, it provides explosion protection in locations with flammable and explosive risks, achieving excellent sealing and explosion-proof functions, effectively ensuring the stable and safe operation of cables and related equipment. In summary, this cable explosion-proof box, through the split mounting component 1, achieves convenient assembly and disassembly, and the design of the injection component 2 to inject adhesive into the sealing cavity 101 effectively improves the sealing and explosion-proof performance at the interface between the cable and the junction box, ensuring the stable and safe operation of cables and related equipment.

[0038] The specific structure of the cable explosion-proof box is described below.

[0039] The explosion-proof box body is formed by two symmetrical mounting parts 1 fastened together in a detachable manner. The mating surfaces of the mounting parts 1 are recessed inwards to form a semi-circular sealing groove 11. The radial cross-section of the sealing groove 11 is semi-circular. When the two mounting parts 1 are fastened together, the sealing grooves 11 are engaged to form a cylindrical sealing cavity 101. Compared to other shapes, the cylindrical sealing cavity 101 experiences more uniform stress under internal pressure and external compression, better maintaining the integrity of the sealing cavity 101 and ensuring its sealing and explosion-proof functions. Furthermore, the semi-circular sealing groove 11 is easier to manufacture, improving production efficiency and reducing costs.

[0040] Specifically, the sides of the sealing groove 11 at both ends of the mating surface are recessed inward to form a cable-fixing groove 12. The radial cross-section of the cable-fixing groove 12 is semi-circular. The two cable-fixing grooves 12 are interlocked to form a cylindrical cable-fixing channel 102. The cylindrical cable-fixing channel 102 closely matches the shape of the cable, tightly wraps around the cable, effectively prevents the cable from shaking in the channel, ensures the cable is stably placed in the explosion-proof box, and thus ensures the stability of the seal. Moreover, the integrated design of the cable-fixing groove 12 and the sealing groove 11 facilitates manufacturing and reduces processing costs.

[0041] The sealing cavity 101 extends to the edge of the mounting part 1 at both ends, forming a semi-circular cable-fixing groove 12 with a smaller diameter on both sides. After being fastened, it forms a cylindrical cable-fixing channel 102, which is coaxially connected to the sealing cavity 101. The inner diameter of the sealing groove 11 is larger than that of the cable-fixing groove 12. A positioning protrusion 13 is formed at the connection between the two. The positioning protrusion 13 acts as a barrier, preventing the cured explosion-proof adhesive injected into the sealing cavity 101 from flowing excessively into the cable-fixing channel 102. This ensures that the cured explosion-proof adhesive is reasonably distributed within the sealing cavity 101, effectively filling the gap between the cable and the sealing cavity 101, and maximizing the sealing and explosion-proof functions. In addition, the different inner diameters also meet the actual needs of cable installation and sealing. The larger inner diameter of the sealing groove 11 can accommodate more cured explosion-proof adhesive, enhancing the sealing and explosion-proof effect, while the smaller inner diameter of the cable-fixing groove 12 can fit the cable more tightly, improving the stability of the cable fixing and the sealing performance.

[0042] To further enhance the sealing performance of the mounting components 1, one of the two mounting components 1 has a sealing strip 15 on its outer periphery of a sealing groove 11, and the other has a corresponding positioning groove on its outer periphery. The sealing strip 15 can be embedded in the positioning groove. When the two mounting components 1 are fastened together, the sealing strip 15 is embedded in the positioning groove, forming a tight fit, effectively preventing external moisture, dust, corrosive gases, etc., from entering the sealing cavity 101 through the joint of the two mounting components 1, further improving the protection capability at the interface between the cable and the junction box. At the same time, the cooperation between the sealing strip 15 and the positioning groove also plays a role in positioning and assisting installation. During installation, by aligning the sealing strip 15 with the positioning groove and embedding it, the two mounting components 1 can be fastened more accurately and quickly, improving installation efficiency and accuracy.

[0043] The sealing strip 15 can be made of existing rubber strips, silicone strips or sponge strips, and its material and form are not limited here.

[0044] The detachable fastening connection between the two mounting parts 1 can be one of magnetic connection, bolt connection or snap-fit ​​connection.

[0045] In this embodiment, the two mounting components 1 are connected by bolts. Specifically, each mounting component 1 has a connecting through hole 14 at each of its four corners, and the connecting through holes 14 of the two mounting components 1 correspond one-to-one. Locking bolts can be threaded into the corresponding two connecting through holes 14 in sequence, ensuring that the two mounting components 1 are tightly connected together. This bolt connection method allows the explosion-proof box to withstand strong vibrations and significant external impacts generated during equipment operation. During subsequent equipment maintenance, if it is necessary to disassemble the explosion-proof box, the bolts can be loosened by rotating them in the opposite direction, allowing the two mounting components 1 to be separated.

[0046] In other embodiments, the two mounting pieces 1 can also be connected magnetically. Multiple magnets are evenly embedded on the mating surface of one mounting piece 1, while a corresponding groove matching the shape of the magnet is provided on the other mounting piece 1, allowing the magnet to be inserted into the groove. When installing the explosion-proof box, the operator simply brings the mounting piece 1 with the magnet close to the other mounting piece 1; under the action of the magnetic force, the two mounting pieces 1 quickly attract each other and align accurately. If it is necessary to open the explosion-proof box to inspect the cables or perform other operations, the operator only needs to apply gentle force to overcome the magnetic force to separate the two mounting pieces 1.

[0047] Alternatively, the two mounting components 1 can be connected by snap-fit ​​connections. Multiple elastic snaps are evenly distributed around the outer periphery of the mating surface of one mounting component 1. These snaps are hook-shaped and possess a certain degree of elastic deformation capability. The corresponding position on the other mounting component 1 has a corresponding slot that matches the elastic snaps. During installation, after the operator places the cable, aligns the two mounting components 1 and presses gently. The elastic snaps will deform under pressure and smoothly engage in the slots, completing the connection. To open the explosion-proof box, the operator simply presses the unlock button on the snap, allowing the snaps to disengage from the slots and easily separate the two mounting components 1.

[0048] It is understandable that the connection method of the two mounting parts 1 is not limited here, as long as they can be interlocked and detachably connected.

[0049] The injection component 2 is installed on one of the mounting components 1 and is used to inject cured explosion-proof glue into the sealing cavity 101 through the injection channel 21 to achieve the explosion-proof and sealing effect on the cable.

[0050] It is understood that the cured explosion-proof adhesive in this embodiment is selected from epoxy resin, polyurethane, or silicone rubber colloids with flame-retardant, high-temperature resistant, and insulating properties. The specific material and chemical composition can be selected according to the actual application scenario requirements. The cured adhesive must meet the requirements of elastic deformation capacity, adhesion strength to the cable and the wall of the sealing cavity 101, and explosion-proof performance, such as maintaining sealing stability in high-temperature, humid, or explosive environments. Those skilled in the art can adapt colloids with different curing characteristics according to cable specifications, explosion-proof box structure, and usage environment. The selection and replacement of cured explosion-proof adhesive materials are not limited here.

[0051] Specifically, the axis of the adhesive injection channel 21 is set at an angle to the axis of the sealing cavity 101, with the angle being greater than or equal to 30 degrees and less than or equal to 60 degrees. This prevents the adhesive from becoming excessively concentrated near the injection point when the angle is less than 30 degrees, making it difficult to evenly fill the gaps between the sealing cavity 101 and the cable, resulting in insufficient filling of the adhesive in some areas, which would affect the sealing effect and reduce the explosion-proof performance. Conversely, it prevents the angle from being greater than 60 degrees, which would cause the adhesive injection part 2 to protrude excessively from the mounting part 1, affecting the space utilization of the cable explosion-proof box.

[0052] Preferably, the angle between the axis of the glue injection channel 21 and the axis of the sealing cavity 101 can be set to 30 degrees, 35 degrees, 40 degrees, 45 degrees, 50 degrees, 55 degrees or 60 degrees, which can be adjusted according to actual needs and is not limited here.

[0053] Furthermore, a sealing cap is detachably connected to the end of the dispensing component 2 furthest from the sealing cavity 101. The sealing cap is used to close or open the dispensing channel 21. This allows the sealing cap to be easily opened during dispensing, ensuring the dispensing channel 21 is unobstructed and facilitating the smooth injection of the cured explosion-proof adhesive and other sealing materials into the sealing cavity 101. After dispensing is complete, the dispensing channel 21 is promptly closed using the sealing cap to prevent external impurities, dust, etc., from entering the dispensing channel 21 and the sealing cavity 101, thus avoiding foreign objects affecting the sealing performance and explosion-proof effect of the cured explosion-proof adhesive.

[0054] The connection between the sealing cap and the injection part 2 can be a hinge, a threaded connection, or a snap-fit ​​connection, all of which are conventional methods and will not be elaborated here.

[0055] In addition, to improve the adaptability and versatility of the cable explosion-proof box, external connectors are provided at both ends of the mounting component 1. The internal connection of the external connector is a fixed cable channel 102, which realizes the smooth connection of the cable path and provides a continuous and regular channel for the cable to enter the explosion-proof box from the external environment and further extend to other equipment. The inner wall of the external connector is provided with internal threads for threaded connection to external equipment; and / or, the outer wall of the external connector is provided with external threads for threaded connection to external equipment, so that effective connection with external equipment can be achieved through threaded connection. The external connector has two forms of implementation, external thread and internal thread, which improves the adaptability of the external connector and can be adapted to the actual situation of the external equipment, which is not limited here.

[0056] External devices can be junction boxes, conduits, etc., which will not be elaborated here.

[0057] The above embodiments merely illustrate the basic principles and characteristics of this utility model. This utility model is not limited to the above embodiments. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An explosion-proof cable box, characterized in that, include: Two mounting parts (1) are able to be snapped together and detachably connected to form an explosion-proof box body. A sealed cavity (101) is formed inside the explosion-proof box body. A wire fixing channel (102) is provided at both ends of the sealed cavity (101). One end of the wire fixing channel (102) is connected to the sealed cavity (101), and the other end is connected to the outside. The wire fixing channel (102) and the sealed cavity (101) are coaxially arranged. The glue injection component (2) is fixedly connected to any of the mounting components (1). The glue injection component (2) has a through-hole glue injection channel (21) which connects the sealing cavity (101) to the outside and is used to inject cured explosion-proof glue into the sealing cavity (101).

2. The cable explosion containment box of claim 1, wherein, The two mounting components (1) are connected by one of the following methods: magnetic connection, bolt connection or snap-fit ​​connection.

3. The cable explosion containment box of claim 1, wherein, The two mounting parts (1) are connected by bolts. Each mounting part (1) has a connecting through hole (14) at each of its four corners. The connecting through holes (14) of the two mounting parts (1) correspond one to one. The locking bolt can be threaded into the corresponding two connecting through holes (14) in sequence.

4. The cable explosion containment box of claim 1, wherein, The center of the mating surface of the mounting component (1) is recessed inward to form a sealing groove (11). The radial cross section of the sealing groove (11) is semi-circular. The sealing grooves (11) of the two mounting components (1) are engaged to form a cylindrical sealing cavity (101).

5. The cable explosion containment box of claim 4, wherein, The sides of the mating surface located at both ends of the sealing groove (11) are recessed inward to form a wire-fixing groove (12). The radial cross section of the wire-fixing groove (12) is semi-circular. The two wire-fixing grooves (12) are engaged to form a cylindrical wire-fixing channel (102).

6. The cable explosion containment box of claim 5, wherein, The inner diameter of the sealing bottom groove (11) is larger than the inner diameter of the fixing bottom groove (12), and a positioning protrusion (13) is formed at the connection between the sealing bottom groove (11) and the fixing bottom groove (12).

7. The explosion-proof cable box according to claim 4, characterized in that, In the two mounting components (1), a sealing strip (5) is provided on the outer periphery of one of the sealing bottom grooves (11), and a positioning groove is provided on the outer periphery of the other sealing bottom groove (11), and the sealing strip (5) can be embedded in the positioning groove.

8. The explosion-proof cable box according to any one of claims 1-7, characterized in that, The axis of the glue injection channel (21) is set at an angle to the axis of the sealing cavity (101), and the angle is greater than or equal to 30 degrees and less than or equal to 60 degrees.

9. The explosion-proof cable box according to any one of claims 1-7, characterized in that, The end of the glue injection component (2) away from the sealing cavity (101) is detachably connected to a sealing cap, which is used to close or open the glue injection channel (21).

10. The explosion-proof cable box according to any one of claims 1-7, characterized in that, The mounting component (1) is provided with external connectors at both ends. The external connectors are internally connected to the fixed wire channel (102). The inner wall of the external connector is provided with internal threads for threaded connection to external equipment; and / or, the outer wall of the external connector is provided with external threads for threaded connection to the external equipment.

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