Cable clamping mechanism for explosion-proof metal gland

Abstract

The utility model discloses a cable clamping mechanism for an explosion-proof metal gland, and relates to the technical field of metal glands. The cable clamping mechanism for the explosion-proof metal gland comprises a metal nut and an external pipe, a metal joint body is in threaded connection with the interior of the metal nut, an external thread sleeve is in threaded connection with the interior of the metal joint body, a mounting plate is fixedly connected to the bottom of the external pipe, and a mounting block is fixedly connected to the bottom of the mounting plate. A convenient clamping mechanism is arranged in the metal nut, a dust sweeping mechanism is arranged on the top of the outer threaded sleeve, and the convenient clamping mechanism comprises an upper clamping air bag, a lower clamping air bag, an upper air pressure bin and a lower air pressure bin. Therefore, when the metal joint body and the external thread sleeve are separated, the upper clamping air bag and the lower clamping air bag can contract, threading is facilitated, and when the metal joint body and the external thread sleeve are connected again, the upper clamping air bag and the lower clamping air bag can collide again to clamp an electric wire.

Description

Technical Field

[0001] The utility model relates to the technical field of metal glands, in particular to a cable clamping mechanism for explosion-proof metal glands. Background Art

[0002] Cable gland, also known as cable waterproof joint and cable fixing head, is widely used in the fixing and protection of wires and cables in mechanical equipment electrical, ship electrical and anti-corrosion equipment. It has good wear resistance and strong corrosion resistance. Some cable glands are equipped with explosion-proof diaphragms to effectively prevent explosions.

[0003] Announcement No. CN212183090U discloses a tube-type armored explosion-proof cable gland, including a metal nut and an external tube, the lower end of the inner wall of the metal nut is threadedly connected to a metal joint body, the lower end of the inner wall of the metal joint body is threadedly connected to an external threaded sleeve, a first annular clamping sleeve is fixedly provided inside the metal joint body, a second annular clamping sleeve is fixedly provided inside the external threaded sleeve, and the cross-sections of the first annular clamping sleeve and the second annular clamping sleeve are both arc-shaped, the upper end of the inner wall of the metal nut is fixedly connected to an internal threaded sleeve, and a fixed sleeve is provided at the lower part of the inside of the metal nut. In the above application documents, the fixed sleeve, rubber sleeve and multiple clamping claws are provided, and the multiple clamping claws and rubber sleeve cooperate with each other to clamp the cable. Since the inner diameter of the rubber sleeve is smaller than the outer diameter of the wire, it will be more troublesome when threading the wire. Utility Model Content

[0004] In view of the deficiencies of the prior art, the utility model provides a cable clamping mechanism for explosion-proof metal glands, which solves the problems raised in the above-mentioned background technology. To achieve the above purpose, the utility model is implemented through the following technical scheme: a cable clamping mechanism for explosion-proof metal glands, including a metal nut and an external tube, the internal thread of the metal nut is connected to a metal joint body, the internal thread of the metal joint body is connected to an external threaded sleeve, the bottom of the external tube is fixedly connected to a mounting plate, the bottom of the mounting plate is fixedly connected to a mounting block, the interior of the metal nut is provided with a convenient clamping mechanism, the top of the external threaded sleeve is provided with a dust sweeping mechanism, the convenient clamping mechanism includes an upper clamping airbag, a lower clamping airbag, an upper air pressure chamber, and a lower air pressure chamber, the upper clamping airbag is fixedly connected to the interior of the metal joint body, and the lower clamping airbag is fixedly connected to the interior of the metal joint body. The cam is fixedly connected to the inside of the external threaded sleeve, the upper air pressure chamber is fixedly connected to the inner wall of the metal joint body through a connecting block A, and the lower air pressure chamber is fixedly connected to the inner wall of the external threaded sleeve through a connecting block B. The end of the upper air pressure chamber away from the lower air pressure chamber is penetrated and fixedly connected with an air pipe, and the two air pipes are respectively penetrated and fixedly connected with the upper clamping airbag and the lower clamping airbag, and the end of the upper air pressure chamber close to the lower air pressure chamber is slidably connected with a piston rod, and the ends of the two piston rods close to each other are fixedly connected to a pressure plate, and the ends of the upper air pressure chamber close to the lower air pressure chamber are fixedly connected to a compression spring, and the ends of the two compression springs close to each other are respectively fixedly connected to two pressure plates.

[0005] Preferably, the dust-sweeping mechanism includes a telescopic spring and collision particles. The telescopic spring is fixedly connected to the top of the external threaded sleeve. The top of the telescopic spring is fixedly connected to an annular brush. The top of the annular brush is fixedly connected to a collision rod. The collision particles are fixedly connected to the inner wall of the metal joint body. The annular brush rotates and moves downward while shaking up and down, so as to clean and remove dust from the inner wall of the metal joint body.

[0006] Preferably, the upper clamping airbag and the lower clamping airbag are both in an expanded state in an initial state, and when the air pressure in the upper clamping airbag and the lower clamping airbag enters the air pressure chamber through the air pipe, the upper clamping airbag and the lower clamping airbag will gradually shrink.

[0007] Preferably, the pressure plates are in contact with each other in an initial state, and the compression spring is in a taut state in an initial state. When the metal joint body is separated from the external threaded sleeve, the pressure plates are separated from each other, and the compression spring rebounds to drive the pressure plate and the piston rod to move.

[0008] Preferably, the upper clamping airbag and the lower clamping airbag are made of the same material, that is, rubber. When the upper clamping airbag and the lower clamping airbag are in an expanded state, they are squeezed against the wires to fix and clamp the wires.

[0009] Preferably, the collision rod and the collision particles are both made of rubber material, and the collision rod and the collision particles are close to each other. When the collision rod rotates with the external threaded sleeve and moves downward, it collides with the collision particles. The collision between the collision rod and the collision particles will drive the annular brush to shake up and down.

[0010] The utility model provides a cable clamping mechanism for explosion-proof metal glands. It has the following beneficial effects:

[0011] (1) The present application is provided with a convenient clamping mechanism, so that when the metal joint body and the external threaded sleeve are separated, the upper clamping airbag and the lower clamping airbag will shrink, which is convenient for threading. When the metal joint body and the external threaded sleeve are reconnected, the upper clamping airbag and the lower clamping airbag will collide again to clamp the wire.

[0012] (2) The present application is provided with a dust sweeping mechanism, so that when the metal joint body and the external threaded sleeve are separated, the annular brush will be driven to rotate and vibrate, thereby cleaning and removing dust from the inner wall of the metal joint body, which is convenient for subsequent use. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 This is a cross-sectional view of the overall structure of the utility model;

[0015] Figure 3 This is a schematic diagram of the structure of the convenient clamping mechanism of the utility model;

[0016] Figure 4 It is a schematic diagram of the structure of the dust sweeping mechanism of the utility model.

[0017] In the figure: 1. Metal nut; 2. External tube; 3. Metal joint body; 4. External threaded sleeve; 5. Mounting plate; 6. Mounting block; 7. Convenient clamping mechanism; 71. Upper clamping airbag; 72. Lower clamping airbag; 73. Upper air pressure chamber; 74. Lower air pressure chamber; 75. Connecting block A; 76. Connecting block B; 77. Air pipe; 78. Piston rod; 79. Pressure plate; 710. Compression spring; 8. Dust sweeping mechanism; 81. Telescopic spring; 82. Ring brush; 83. Collision rod; 84. Collision particles. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0019] Embodiment 1

[0020] See also Figure 1-3A cable clamping mechanism for explosion-proof metal gland, comprising a metal nut 1, an external tube 2, the metal nut 1 is internally threadedly connected with a metal joint body 3, the metal joint body 3 is internally threadedly connected with an external thread sleeve 4, the bottom of the external tube 2 is fixedly connected with a mounting plate 5, the bottom of the mounting plate 5 is fixedly connected with a mounting block 6, the metal nut 1 is internally provided with a convenient clamping mechanism 7, the top of the external thread sleeve 4 is provided with a dust sweeping mechanism 8, the convenient clamping mechanism 7 comprises an upper clamping airbag 71, a lower clamping airbag 72, an upper air pressure chamber 73, a lower The air pressure chamber 74, the upper clamping airbag 71 and the lower clamping airbag 72 are made of the same material, both of which are rubber materials. When the upper clamping airbag 71 and the lower clamping airbag 72 are in an expanded state, they squeeze the wires and play a role in fixing and clamping the wires. The upper clamping airbag 71 is fixedly connected to the inside of the metal joint body 3, and the lower clamping airbag 72 is fixedly connected to the inside of the external threaded sleeve 4. The upper clamping airbag 71 and the lower clamping airbag 72 are both in an expanded state in the initial state. When the air pressure in the upper clamping airbag 71 and the lower clamping airbag 72 enters the air pressure chamber 74 through the air pipe 77, the air pressure in the upper clamping airbag 71 and the lower clamping airbag 72 enters the air pressure chamber 74 through the air pipe 77. 3, the upper clamping airbag 71 and the lower clamping airbag 72 will gradually shrink, the upper air pressure chamber 73 is fixedly connected to the inner wall of the metal joint body 3 through the connecting block A75, and the lower air pressure chamber 74 is fixedly connected to the inner wall of the external threaded sleeve 4 through the connecting block B76. The ends of the upper air pressure chamber 73 and the lower air pressure chamber 74 that are far away are penetrated and fixedly connected with an air pipe 77. The two air pipes 77 are respectively penetrated and fixedly connected with the upper clamping airbag 71 and the lower clamping airbag 72. The ends of the upper air pressure chamber 73 and the lower air pressure chamber 74 that are close to each other are internally slidably connected with The piston rod 78, the ends of the two piston rods 78 that are close to each other are fixedly connected with a pressure plate 79, and the ends of the upper air pressure chamber 73 and the lower air pressure chamber 74 that are close to each other are fixedly connected with a compression spring 710. The pressure plates 79 fit each other in the initial state, and the compression springs 710 are in a taut state in the initial state. When the metal joint body 3 is separated from the external threaded sleeve 4, the pressure plates 79 are separated from each other, and the compression springs 710 rebound to drive the pressure plates 79 and the piston rod 78 to move. The ends of the two compression springs 710 that are close to each other are fixedly connected to the two pressure plates 79 respectively.

[0021] When in use, the external threaded sleeve 4 is rotated to separate it from the metal joint body 3 so as to pass the wire through. When the metal joint body 3 is separated from the external threaded sleeve 4, the pressure plates 79 are separated from each other, and the compression spring 710 rebounds to drive the pressure plate 79 and the piston rod 78 to move. The piston rod 78 moves away from the air pressure chamber 73 to generate negative pressure in the air pressure chamber 73, thereby extracting air pressure from the upper clamping airbag 71 and the lower clamping airbag 72 through the air pipe 77. The air pressure in the upper clamping airbag 71 and the lower clamping airbag 72 will be gradually contracted when it is extracted, which makes it convenient for the wire to pass through. When the metal joint body 3 and the external threaded sleeve 4 are recombined, the pressure plates 79 are re-attached to each other, and the air pressure in the air pressure chamber 73 returns to the upper clamping airbag 71 and the lower clamping airbag 72, and the upper clamping airbag 71 and the lower clamping airbag 72 expand again to fix and clamp the wire.

[0022] Embodiment 2

[0023] See also Figure 1-4 On the basis of the first embodiment, the dust sweeping mechanism 8 includes a telescopic spring 81 and collision particles 84. The telescopic spring 81 is fixedly connected to the top of the external threaded sleeve 4. The top of the telescopic spring 81 is fixedly connected to a ring brush 82. The top of the ring brush 82 is fixedly connected to a collision rod 83. The collision particles 84 are fixedly connected to the inner wall of the metal joint body 3. The ring brush 82 rotates and moves downward while shaking up and down, so as to clean and remove dust from the inner wall of the metal joint body 3. The collision rod 83 and the collision particles 84 are both made of rubber, and the collision rod 83 and the collision particles 84 are close to each other. When the collision rod 83 rotates and moves downward with the external threaded sleeve 4, it will collide with the collision particles 84. The collision between the collision rod 83 and the collision particles 84 will drive the annular brush 82 to shake up and down.

[0024] During use, based on the first embodiment, when the external threaded sleeve 4 is rotated to separate it from the metal joint body 3, the collision rod 83 follows the external threaded sleeve 4 to rotate and move downward and will collide with the collision particles 84. The collision between the collision rod 83 and the collision particles 84 will drive the annular brush 82 to swing up and down. The annular brush 82 rotates and moves downward while swinging up and down, so as to clean and remove dust from the inner wall of the metal joint body 3.

[0025] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A cable clamping mechanism for an explosion-proof metal gland, comprising a metal nut (1) and an external tube (2), characterized in that: The internal thread of the metal nut (1) is connected to a metal joint body (3), the internal thread of the metal joint body (3) is connected to an external thread sleeve (4), the bottom of the external pipe (2) is fixedly connected to a mounting plate (5), the bottom of the mounting plate (5) is fixedly connected to a mounting block (6), a convenient clamping mechanism (7) is provided inside the metal nut (1), and a dust sweeping mechanism (8) is provided on the top of the external thread sleeve (4); The convenient clamping mechanism (7) comprises an upper clamping airbag (71), a lower clamping airbag (72), an upper air pressure chamber (73), and a lower air pressure chamber (74); the upper clamping airbag (71) is fixedly connected to the inside of the metal joint body (3); the lower clamping airbag (72) is fixedly connected to the inside of the external threaded sleeve (4); the upper air pressure chamber (73) is fixedly connected to the inner side wall of the metal joint body (3) via a connecting block A (75); the lower air pressure chamber (74) is fixedly connected to the inner side wall of the external threaded sleeve (4) via a connecting block B (76); the upper air pressure chamber (73) is spaced apart from the lower air pressure chamber (74). An air pipe (77) is passed through and fixedly connected to one end of the upper air pressure chamber (73) and the lower air pressure chamber (74), respectively. The two air pipes (77) are passed through and fixedly connected to the upper clamping airbag (71) and the lower clamping airbag (72), respectively. A piston rod (78) is slidably connected inside the end of the upper air pressure chamber (73) and the lower air pressure chamber (74), and the two piston rods (78) are fixedly connected to a pressure plate (79) at their respective ends. A compression spring (710) is fixedly connected to the two compression springs (710) at their respective ends, respectively.

2. A cable clamping mechanism for explosion-proof metal gland according to claim 1, characterized in that: The dust sweeping mechanism (8) comprises a telescopic spring (81) and collision particles (84); the telescopic spring (81) is fixedly connected to the top of the external threaded sleeve (4); the top of the telescopic spring (81) is fixedly connected to an annular brush (82); the top of the annular brush (82) is fixedly connected to a collision rod (83); and the collision particles (84) are fixedly connected to the inner wall of the metal joint body (3).

3. A cable clamping mechanism for explosion-proof metal gland according to claim 1, characterized in that: The upper clamping airbag (71) and the lower clamping airbag (72) are both in an expanded state in an initial state.

4. A cable clamping mechanism for explosion-proof metal gland according to claim 1, characterized in that: The pressure plates (79) are in contact with each other in an initial state, and the compression spring (710) is in a tensioned state in an initial state.

5. The cable clamping mechanism for explosion-proof metal gland according to claim 1, characterized in that: The upper clamping airbag (71) and the lower clamping airbag (72) are made of the same material, namely rubber.

6. A cable clamping mechanism for explosion-proof metal gland according to claim 2, characterized in that: The collision rod (83) and the collision particles (84) are both made of rubber material, and the collision rod (83) and the collision particles (84) are close to each other.

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