Cable joint with explosion-proof function

Abstract

The invention relates to the technical field of cable joints, in particular to a cable joint with an explosion-proof function. Comprising a shell, a hollow pipe and a wiring terminal, the outer side of the shell is communicated with the hollow pipe, the wiring terminal is arranged in the hollow pipe in a sliding mode, a fixing plate is arranged on the inner side of the shell, and a through hole is formed in the fixing plate. By arranging a linkage structure of the movable block and the shell, after the wiring terminal is connected with an equipment connector, the movable block is pushed through the threaded sleeve to clamp the equipment connector, a physical partition is formed, external flammable and explosive gas or dust is effectively prevented from entering the shell to make contact with electric arcs and sparks, and therefore the explosion risk is greatly reduced; and the rubber material in the annular cylinder is extruded out under the action of the pressure applying mechanism and is filled between the shell and the surface of the equipment, so that the joint of the shell and the equipment is sealed and fixed, meanwhile, the isolation function of the movable block is matched, dual-sealing protection is formed, and the explosion-proof safety is further improved.

Description

Technical Field

[0001] This invention relates to the technical field of cable joints, and more particularly to a cable joint with explosion-proof function. Background Technology

[0002] Cables, as a key carrier for power and signal transmission, are widely used in various fields of industrial production and daily life. Especially in dangerous environments such as oil, natural gas, chemical, and coal mines where there are flammable and explosive gases, vapors, dust, or fibers, the safety and reliability of cable systems not only directly affect the normal operation of equipment, but also concern the safety of people's lives and property. Therefore, electrical connection devices used in such high-risk environments must have a high level of safety protection capabilities to prevent fires or explosions caused by electrical faults.

[0003] As a crucial component for electrical connections between cables, cable joints directly impact the stability and safety of the entire cable system. Traditional cable joints are primarily designed for power or signal transmission in conventional environments, focusing on ensuring good contact and insulation between conductors. They typically lack specialized protective measures for hazardous environments. In practical applications, due to short circuits, overloads, poor contact, or other reasons, arcs, sparks, or localized high temperatures may be generated inside the cable joint. These can become ignition sources for surrounding flammable gases or dust, posing significant safety hazards, especially in explosive gas environments or flammable dust environments. Summary of the Invention

[0004] In view of this, the present invention provides a cable joint with explosion-proof function, which can solve the shortcomings of traditional cable joints that lack special protective measures for hazardous environments. The electric arc, spark or local high temperature generated inside can easily become an ignition source for igniting the surrounding flammable gas or dust, which poses a great safety hazard.

[0005] The technical implementation scheme of the present invention is as follows: a cable connector with explosion-proof function includes a housing, a hollow tube, and a terminal block. The hollow tube is connected to the outside of the housing, and the terminal block is slidably arranged inside the hollow tube. A fixing plate is provided on the inside of the housing, and a through hole is opened on the fixing plate. Movable blocks are slidably arranged at intervals inside the housing. The movable blocks are used to clamp the connector on the equipment. An elastic rope is connected between the movable blocks and the inside of the housing. A threaded sleeve is threaded on the outside of the housing. The threaded sleeve is used to apply pressure to the movable blocks. Heat dissipation blocks are arranged at intervals on the housing. A heat dissipation inner cylinder is connected between the inner sides of the heat dissipation blocks, and a heat dissipation outer cylinder is connected between the outer sides of the heat dissipation blocks. The heat dissipation blocks, the heat dissipation inner cylinder, and the heat dissipation outer cylinder are all used to dissipate heat inside the housing. An annular cylinder is installed on the heat dissipation outer cylinder. A glue outlet tube is connected to the annular cylinder. A pressure applying mechanism is provided on the annular cylinder. The pressure applying mechanism is used to extrude the glue material inside the annular cylinder. A sealing mechanism is provided on the housing. The sealing mechanism is used to seal the end of the housing.

[0006] Optionally, the pressure mechanism includes a sliding frame and a pressure block. The sliding frame is slidably disposed on the annular cylinder and is rotatably connected to the threaded sleeve. The pressure block is disposed on the sliding frame and is located inside the annular cylinder. The pressure block is used to extrude the rubber material inside the annular cylinder.

[0007] Optionally, the sealing mechanism includes a sealing cover and a nut. The sealing cover is threaded onto the housing, and the nut is connected to the sealing cover. The nut is used to press the terminal block onto the fixing plate.

[0008] Optionally, it also includes a hexagonal block, which is connected to the closure cover and is used to assist the operator in twisting the closure cover to rotate.

[0009] Optionally, the fixing plate also includes a positioning plate, which is provided with a positioning plate and is used to limit the position of the wiring terminal.

[0010] Optionally, it also includes heat dissipation fins, with heat dissipation fins spaced apart on the heat dissipation outer cylinder, the heat dissipation fins being used to dissipate heat from the heat dissipation outer cylinder.

[0011] Optionally, it also includes a one-way injection port, which is provided on the annular cylinder for injecting adhesive into the annular cylinder.

[0012] Optionally, it also includes a push block and a rocker arm. The push block is slidably disposed on the hexagonal block, and the rocker arm is connected to the push block. The rocker arm is located inside the hexagonal block and is used to drive the hexagonal block to rotate.

[0013] Optionally, it also includes a magnetic ring, which is provided on the hexagonal block and is used to limit the rocker arm.

[0014] Optionally, the push block is provided with anti-slip grooves spaced apart, which are used to assist the operator in pushing the push block to move.

[0015] Compared with the prior art, the present invention has the following advantages: 1. The present invention sets up a linkage structure between the movable block and the shell. After the terminal is connected to the equipment connector, the movable block is pushed by the threaded sleeve to clamp the equipment connector and form a physical barrier, which effectively prevents external flammable and explosive gases or dust from entering the shell and coming into contact with electric arcs or sparks, thereby greatly reducing the risk of explosion. Then, the rubber material in the annular cylinder is squeezed out and filled between the shell and the equipment surface under the action of the pressure mechanism, so as to achieve sealing and fixing at the interface between the shell and the equipment. At the same time, in conjunction with the isolation function of the movable block, a double sealing protection is formed, which further improves the explosion-proof safety.

[0016] 2. The present invention provides a heat dissipation block, a heat dissipation inner cylinder, and a heat dissipation outer cylinder inside the housing. The three work together to quickly conduct and dissipate the heat generated inside the housing due to electrical connections to the external environment, avoid the fire hazard caused by local high temperature, and ensure the stability of the cable joint under high load operation.

[0017] 3. The present invention can use the positioning plate on the fixed plate to limit the terminal block, ensuring that it is accurately aligned with the through hole, thereby improving installation efficiency and connection reliability. Moreover, the nut and the sealing cover are integrated, which can firmly press the terminal block onto the fixed plate while sealing the housing, preventing loosening and poor contact. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0019] Figure 2 This is a three-dimensional structural diagram of the wiring terminal, fixing plate, and movable block of the present invention.

[0020] Figure 3 This is a three-dimensional structural diagram of the wiring terminal, through hole, and elastic rope of the present invention.

[0021] Figure 4 This is a three-dimensional structural diagram of the heat dissipation block, the inner heat dissipation cylinder, and the outer heat dissipation cylinder of the present invention.

[0022] Figure 5 This is a three-dimensional structural diagram of the heat dissipation inner cylinder, heat dissipation outer cylinder, and heat dissipation fins of the present invention.

[0023] Figure 6 This is a three-dimensional structural diagram of the heat dissipation outer cylinder, annular cylinder, and dispensing tube of the present invention.

[0024] Figure 7 This is a three-dimensional structural diagram of the pressure application mechanism of the present invention.

[0025] Figure 8 This is a three-dimensional structural diagram of the state after the cable of the present invention is connected to the connector on the equipment.

[0026] Figure 9 This is a three-dimensional structural diagram of the closing mechanism of the present invention.

[0027] Figure 10 This is a three-dimensional structural diagram of the pusher, rocker arm, and magnetic ring of the present invention.

[0028] The components in the attached diagram are labeled as follows: 1: Housing, 101: Cable, 102: Connector on the equipment, 2: Hollow tube, 3: Terminal block, 4: Fixing plate, 5: Through hole, 6: Movable block, 7: Elastic rope, 8: Threaded sleeve, 9: Heat sink block, 10: Heat sink inner cylinder, 11: Heat sink outer cylinder, 12: Annular cylinder, 13: Dispensing tube, 1401: Sliding frame, 1402: Pressure block, 1501: Sealing cover, 1502: Nut, 15: Hexagonal block, 16: Positioning plate, 17: Heat sink fins, 18: One-way dispensing port, 19: Push block, 20: Rocker arm, 21: Magnetic ring, 22: Anti-slip groove. Detailed Implementation

[0029] Example: A cable connector with explosion-proof function, see below. Figures 1-9 As shown, it includes a housing 1, a hollow tube 2, and a terminal block 3; the housing 1 is made of explosion-proof material, and the bottom of the housing 1 is connected to the hollow tube 2; the terminal block 3 is slidably disposed inside the hollow tube 2, and the terminal block 3 is used to connect with the cable 101. The terminal block 3 has a connection hole, and the connection hole is used for the connector 102 on the equipment to pass through.

[0030] It also includes a fixed plate 4, a movable block 6, an elastic rope 7, a threaded sleeve 8, a heat sink 9, a heat sink inner cylinder 10, a heat sink outer cylinder 11, an annular cylinder 12, a dispensing tube 13, a pressure applying mechanism, and a sealing mechanism; a fixed plate 4 is provided inside the housing 1, and a through hole 5 is provided in the middle of the fixed plate 4; a movable block 6 is provided in annular intervals on the left side inside the housing 1, and the movable block 6 is used to clamp the connector 102 on the equipment. After clamping the connector 102 on the equipment, the movable block 6 isolates the connector 102 on the equipment from the outside world, preventing external... Flammable and explosive gases or dust come into contact with the connector 102 on the equipment; two elastic ropes 7 are connected between the movable block 6 and the inner side of the housing 1. The elastic ropes 7 are used to pull the movable block 6 to move and reset. The side of the movable block 6 away from the inside of the housing 1 is set as an inclined surface; a threaded sleeve 8 is threaded on the outer side of the housing 1. When the threaded sleeve 8 moves to contact the inclined surface on the movable block 6, the threaded sleeve 8 will squeeze the movable block 6 to move, so that the movable block 6 clamps the connector 102 on the equipment inside the housing 1; two sets of heat dissipation blocks are spaced apart on the housing 1. 9. Two sets of heat dissipation blocks 9 are distributed left and right, with eight heat dissipation blocks 9 in each set, arranged in a ring. A heat dissipation inner cylinder 10 connects the inner sides of the right set of heat dissipation blocks 9. A heat dissipation outer cylinder 11 connects the outer sides of the two sets of heat dissipation blocks 9, located on the outer wall of the shell 1. The heat dissipation blocks 9, the inner cylinder 10, and the outer cylinder 11 are all used for heat dissipation within the shell 1. The heat dissipation blocks 9, the inner cylinder 10, and the outer cylinder 11 are made of a composite material with good thermal conductivity and a certain degree of insulation. It can effectively conduct heat and ensure electrical safety; an annular cylinder 12 is installed on the left side of the outer side of the heat dissipation outer cylinder 11. The annular cylinder 12 is used to store adhesive. A one-way glue injection port 18 is provided on the top left side of the annular cylinder 12. The one-way glue injection port 18 is used to inject adhesive into the annular cylinder 12; two glue outlet pipes 13 are connected to the bottom of the annular cylinder 12; a pressure applying mechanism is provided on the annular cylinder 12. The pressure applying mechanism is used to extrude the adhesive in the annular cylinder 12; a sealing mechanism is provided on the shell 1. The sealing mechanism is used to seal the right side of the shell 1.

[0031] See Figure 7 As shown, the pressure applying mechanism includes a sliding frame 1401 and a pressure block 1402; the sliding frame 1401 is slidably arranged on the right side of the annular cylinder 12, and the right side of the sliding frame 1401 is rotatably connected to the left side of the threaded sleeve 8; the pressure block 1402 is arranged on the left side of the sliding frame 1401, and the pressure block 1402 is located inside the annular cylinder 12. The pressure block 1402 is used to extrude the rubber material inside the annular cylinder 12.

[0032] See Figure 9 As shown, the sealing mechanism includes a sealing cover 1501 and a nut 1502; the sealing cover 1501 is threaded on the right side of the housing 1, and the nut 1502 is connected to the middle of the left side of the sealing cover 1501. The nut 1502 is used to press the terminal block 3 onto the fixing plate 4.

[0033] In use, first inject an appropriate amount of adhesive into the annular cylinder 12 through the one-way injection port 18. Then, connect the cable 101 to the terminal block 3. Next, insert the terminal block 3 into the hollow tube 2 until the mating hole on the terminal block 3 aligns with the through hole 5. Then, use heat shrink tubing to fix and seal the outer surface of the cable 101 to the outer surface of the hollow tube 2. After that, align the left side of the housing 1 with the connector 102 on the equipment. Then, push the housing 1 to the side closer to the equipment so that the connector 102 on the equipment is inserted into the inside of the housing 1, so that the connector 102 on the equipment passes through the through hole 5 on the fixing plate 4 and the mating hole on the terminal block 3 (e.g., ...). Figure 8 (As shown), until the left side of the housing 1 contacts the equipment surface, then twist the threaded sleeve 8 to rotate, causing the threaded sleeve 8 to move to the left. This causes the threaded sleeve 8 to drive the sliding frame 1401 and the pressure block 1402 to move to the left, thereby causing the pressure block 1402 to squeeze the adhesive in the annular cylinder 12, so that the adhesive in the annular cylinder 12 flows out through the adhesive outlet pipe 13. This fills the space between the inner side of the annular cylinder 12 and the outer side of the heat dissipation outer cylinder 11, thus bonding the left side of the housing 1 to the equipment surface. The housing 1 is fixed, and the left side of the housing 1 is sealed to the surface of the equipment to prevent flammable and explosive gases or dust from entering the inside of the housing 1 and coming into contact with the connector 102 on the equipment. When the threaded sleeve 8 moves to the left and contacts the inclined surface on the movable block 6, the threaded sleeve 8 will squeeze the movable block 6 to move closer to the inside of the housing 1. The elastic rope 7 is stretched, causing the movable block 6 to clamp the connector 102 on the equipment inside the housing 1, thereby fixing the connector 102 on the equipment. The movable block 6 will also form... The partition wall isolates the connector 102 on the equipment inside the housing 1, thereby preventing flammable and explosive gases or dust from entering the inside of the housing 1 and coming into contact with the connector 102 on the equipment through double sealing. This avoids the explosion caused by the electric arc or spark generated by the flammable and explosive gases or dust coming into contact with the connector 102 on the equipment. Then, the sealing cover 1501 is rotated and screwed into the right side of the housing 1, so that the sealing cover 1501 seals the right side of the housing 1. During this process, when the nut 1502 on the sealing cover 1501 comes into contact with the connector 102 on the equipment, the nut 1502 will be screwed into the connector 102 on the equipment. Then, as the nut 1502 moves to the left on the connector 102 on the equipment, when the nut 1502 comes into contact with the terminal 3, the nut 1502 will press the terminal 3 against the right side of the fixing plate 4 for limiting, thereby ensuring the stability of the connector 102 and the terminal 3 on the equipment and ensuring good contact between the connector 102 and the terminal 3 on the equipment. In this way, the connector 102 on the equipment and the cable 101 can be connected.

[0034] During the use of the explosion-proof cable connector, when the connector 102 and terminal 3 on the equipment generate heat inside the housing 1, the heat dissipation block 9, the heat dissipation inner cylinder 10 and the heat dissipation outer cylinder 11 can dissipate heat inside the housing 1, thereby preventing fire caused by excessive local temperature inside the housing 1.

[0035] See Figure 9 and Figure 10 As shown, it also includes a hexagonal block 15; the right side of the sealing cover 1501 is connected to the hexagonal block 15, which is used to assist the operator in twisting the sealing cover 1501 to rotate.

[0036] By setting hexagonal block 15, the operator can rotate the sealing cover 1501 by twisting hexagonal block 15, which makes it convenient for the operator to install or remove the sealing cover 1501.

[0037] See Figure 2 , Figure 3 and Figure 8 As shown, it also includes a positioning plate 16; the positioning plate 16 is provided on the upper right side of the fixing plate 4, and the positioning plate 16 is used to limit the position of the wiring terminal 3.

[0038] By setting the positioning plate 16, when it is necessary to insert the terminal 3 into the hollow tube 2 and align the mating hole on the terminal 3 with the through hole 5, the top of the terminal 3 can be placed against the positioning plate 16 after the terminal 3 is inserted into the hollow tube 2. The positioning plate 16 is used to limit the terminal 3, so that it is convenient to align the mating hole on the terminal 3 with the through hole 5.

[0039] See Figure 4 and Figure 5 As shown, it also includes heat dissipation fins 17; three heat dissipation fins 17 are arranged at intervals on the right side of the outer side of the heat dissipation outer cylinder 11, and the heat dissipation fins 17 are used to dissipate heat from the heat dissipation outer cylinder 11.

[0040] By setting heat dissipation fins 17, heat dissipation fins 17 can be used to dissipate heat from the heat dissipation outer cylinder 11, thereby improving the heat dissipation efficiency of heat dissipation block 9, heat dissipation inner cylinder 10 and heat dissipation outer cylinder 11 to the shell 1.

[0041] See Figure 9 and Figure 10 As shown, it also includes a push block 19 and a rocker arm 20; the push block 19 is slidably disposed on the right side of the hexagonal block 15, and the push block 19 is provided with anti-slip grooves 22 spaced apart on the right side. When the operator pushes the push block 19, the anti-slip grooves 22 can increase the friction between the push block 19 and the operator's hand, thereby preventing the operator's hand from slipping, thus assisting the operator in pushing the push block 19 to move; the rocker arm 20 is connected to the left side of the push block 19. The rocker arm 20 is made of iron and is located inside the hexagonal block 15. The rocker arm 20 is used to drive the hexagonal block 15 to rotate.

[0042] By setting up push block 19 and rocker arm 20, when the operator needs to rotate hexagonal block 15, push block 19 can be pushed backward, causing push block 19 to move rocker arm 20 backward, so that rocker arm 20 extends out from the inside of hexagonal block 15. Then the operator can hold rocker arm 20 and rotate it around hexagonal block 15, thereby driving push block 19 and hexagonal block 15 to rotate. In this way, the operator can easily rotate hexagonal block 15. After hexagonal block 15 has finished rotating, push block 19 can be pushed forward to reset, causing push block 19 to move rocker arm 20 forward to reset, so that rocker arm 20 retracts into hexagonal block 15.

[0043] See Figure 10 As shown, it also includes a magnetic ring 21; a magnetic ring 21 is provided on the rear side of the hexagonal block 15, and the rocker arm 20 slides through the magnetic ring 21. The magnetic ring 21 is used to limit the rocker arm 20.

[0044] By setting up a magnetic ring 21, the magnetic ring 21 can be used to magnetically attract the joystick 20 and limit its movement, preventing the joystick 20 from moving freely within the hexagonal block 15.

Claims

1. A cable connector with explosion-proof function, comprising a housing (1), a hollow tube (2), and a terminal block (3), wherein the hollow tube (2) is connected to the outside of the housing (1), and the terminal block (3) is slidably disposed inside the hollow tube (2), characterized in that, A fixing plate (4) is provided on the inner side of the housing (1), and a through hole (5) is provided on the fixing plate (4). Movable blocks (6) are slidably arranged at intervals inside the housing (1). The movable blocks (6) are used to clamp the connectors (102) on the equipment. An elastic rope (7) is connected between the movable blocks (6) and the inner side of the housing (1). A threaded sleeve (8) is threaded on the outer side of the housing (1). The threaded sleeve (8) is used to apply pressure to the movable blocks (6). Heat dissipation blocks (9) are arranged at intervals on the housing (1). A heat dissipation inner cylinder is connected between the inner sides of the heat dissipation blocks (9). (10) A heat dissipation outer cylinder (11) is connected between the outer sides of the heat dissipation block (9). The heat dissipation block (9), the heat dissipation inner cylinder (10) and the heat dissipation outer cylinder (11) are all used to dissipate heat inside the shell (1). An annular cylinder (12) is installed on the heat dissipation outer cylinder (11). A glue outlet pipe (13) is connected to the annular cylinder (12). A pressure applying mechanism is provided on the annular cylinder (12). The pressure applying mechanism is used to extrude the glue material inside the annular cylinder (12). A sealing mechanism is provided on the shell (1). The sealing mechanism is used to seal the end of the shell (1).

2. A cable connector with explosion-proof function according to claim 1, characterized in that, The pressure mechanism includes a sliding frame (1401) and a pressure block (1402). The sliding frame (1401) is slidably disposed on the annular cylinder (12). The sliding frame (1401) is rotatably connected to the threaded sleeve (8). The pressure block (1402) is disposed on the sliding frame (1401). The pressure block (1402) is located inside the annular cylinder (12). The pressure block (1402) is used to extrude the rubber material inside the annular cylinder (12).

3. A cable connector with explosion-proof function according to claim 1, characterized in that, The sealing mechanism includes a sealing cover (1501) and a nut (1502). The housing (1) is threaded with a sealing cover (1501), and a nut (1502) is connected to the sealing cover (1501). The nut (1502) is used to press the terminal (3) onto the fixing plate (4).

4. A cable connector with explosion-proof function according to claim 3, characterized in that, It also includes a hexagonal block (15), which is connected to the sealing cover (1501). The hexagonal block (15) is used to assist the operator in twisting the sealing cover (1501) to rotate.

5. A cable connector with explosion-proof function according to claim 1, characterized in that, It also includes a positioning plate (16), the fixing plate (4) is provided with the positioning plate (16), the positioning plate (16) is used to limit the position of the wiring terminal (3).

6. A cable connector with explosion-proof function according to claim 1, characterized in that, It also includes heat dissipation fins (17), and the heat dissipation outer cylinder (11) is provided with heat dissipation fins (17) at intervals, and the heat dissipation fins (17) are used to dissipate heat from the heat dissipation outer cylinder (11).

7. A cable connector with explosion-proof function according to claim 1, characterized in that, It also includes a one-way glue injection port (18), which is provided on the annular cylinder (12) for injecting glue into the annular cylinder (12).

8. A cable connector with explosion-proof function according to claim 4, characterized in that, It also includes a push block (19) and a rocker arm (20). The push block (19) is slidably disposed on the hexagonal block (15), and the rocker arm (20) is connected to the push block (19). The rocker arm (20) is located inside the hexagonal block (15) and is used to drive the hexagonal block (15) to rotate.

9. A cable connector with explosion-proof function according to claim 8, characterized in that, It also includes a magnetic ring (21), which is provided on the hexagonal block (15) and is used to limit the rocker arm (20).

10. A cable connector with explosion-proof function according to claim 8, characterized in that, The push block (19) is provided with anti-slip grooves (22) spaced apart, and the anti-slip grooves (22) are used to assist the operator in pushing the push block (19) to move.

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