Explosion-proof cable clamping and sealing joint

Abstract

The utility model discloses an explosion-proof cable clamping and sealing joint, which comprises a joint main body, a clamping sealing sleeve arranged in the joint main body, a clamping claw sleeved on the outer side of the clamping sealing sleeve, and a screw cap in threaded connection with the outer side of the joint main body, and the outer side of the joint main body is in threaded connection with a clamping ring. A plurality of elastic pieces which are annularly distributed at equal intervals are arranged on the side, close to the nut, of the clamping ring, a plurality of grooves matched with the elastic pieces are formed in one side of the nut, external threads are arranged on the outer side of the connector body, second internal threads matched with the external threads are arranged on the inner sides of the elastic pieces, and first internal threads matched with the external threads are arranged on the inner side of the nut. According to the utility model, through the arrangement of the clamping ring, the elastic sheet and the groove, the nut can be prevented from loosening when being vibrated, and the clamping sealing sleeve cannot be tightly attached to a cable, so that the clamping sealing sleeve is ensured to keep a good sealing effect.

Description

Technical Field

[0001] The utility model relates to the technical field of cable joints, in particular to an explosion-proof cable clamping and sealing joint. Background Art

[0002] Explosion-proof cable clamping sealing joint, also known as explosion-proof cable gland, is mainly composed of joint body, nut, clamping claw and clamping sealing sleeve and other parts. It is generally installed at the connection between explosion-proof cable port and explosion-proof equipment to introduce cables and fix the position to achieve sealing and explosion-proof effect.

[0003] Most of the existing explosion-proof cable clamping and sealing joints use nuts to squeeze the clamping claws, and the clamping claws shrink and push the clamping sealing sleeve, which is close to the cable to achieve sealing. However, some explosion-proof equipment will vibrate, causing the nut to vibrate. After long-term use, the nut is easy to loosen, resulting in the clamping sealing sleeve unable to close to the cable, which in turn affects the sealing effect. Utility Model Content

[0004] The utility model aims to provide an explosion-proof cable clamping and sealing joint to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an explosion-proof cable clamping and sealing joint, comprising a joint body, a clamping sealing sleeve arranged inside the joint body, a clamping claw sleeved on the outside of the clamping sealing sleeve, and a nut threadedly connected to the outside of the joint body, the outer side of the joint body is threadedly connected with a clamping ring, a side of the clamping ring close to the nut is provided with a plurality of spring pieces distributed in an annular shape and at equal intervals, a side of the nut is provided with a plurality of grooves matching the spring pieces, an outer side of the joint body is provided with an external thread, an inner side of the spring piece is provided with a second internal thread matching the external thread, an inner side of the nut is provided with a first internal thread matching the external thread, a thread rotation direction of the second internal thread is opposite to that of the first internal thread, a guide cone ring is installed inside the nut, a connecting ring is provided on one side of the guide cone ring, a tapered portion is provided on the other side of the guide cone ring, a film is provided at one end of the clamping seal sleeve, a convex edge is provided on the outer side of the clamping seal sleeve, an inner side wall of the joint body is provided with an indentation portion, and an O-ring is installed on the outer side of the joint body.

[0006] As a preferred solution of the utility model, the material of the clamping ring and the spring piece is stainless steel, and the material of the guide cone ring is nylon.

[0007] Compared with the prior art, the utility model has the following beneficial effects: the utility model can prevent the nut from loosening when subjected to vibration, causing the clamping sealing sleeve to be unable to fit tightly against the cable, thereby ensuring that the clamping sealing sleeve maintains a good sealing effect, and the guide cone ring and the cone portion can evenly apply force to the clamping claw, so that the clamping claw evenly contracts and pushes the clamping sealing sleeve to fit tightly against the cable, thereby achieving a better sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0009] Figure 2 For this utility model Figure 1 Exploded diagram of

[0010] Figure 3 It is a front cross-sectional view of the utility model;

[0011] Figure 4 It is a structural schematic diagram of the nut of the utility model;

[0012] Figure 5 It is a structural schematic diagram of the guide cone ring of the utility model.

[0013] In the figure: 1. Connector body; 2. Nut; 3. Guide cone ring; 4. Snap ring; 5. Spring piece; 6. O-ring; 7. External thread; 8. Recessed portion; 9. Clamping sealing sleeve; 10. Flange; 11. Film; 12. Clamping claw; 13. Connecting ring; 14. Groove; 15. Conical portion; 16. First internal thread; 17. Second internal thread. DETAILED DESCRIPTION

[0014] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0015] See also Figures 1 to 5The utility model provides a technical solution: an explosion-proof cable clamping and sealing joint, comprising a joint body 1, a clamping sealing sleeve 9 arranged inside the joint body 1, a clamping claw 12 sleeved on the outside of the clamping sealing sleeve 9, and a nut 2 threadedly connected to the outside of the joint body 1, the nut 2 is used to push the guide cone ring 3 to move, the guide cone ring 3 squeezes the clamping claw 12 to shrink it, and the clamping claw 12 shrinks and pushes the clamping sealing sleeve 9 to close to the cable, thereby achieving a good sealing effect, the outer side of the joint body 1 is threadedly connected with a clamping ring 4, and a plurality of shrapnel 5 distributed in an annular shape and at equal distances are provided on the side of the clamping ring 4 close to the nut 2, and the shrapnel 5 is inclined. When the nut 2 is tightened and rotated, the nut The cap 2 will compress the spring sheet 5, and the spring sheet 5 will not block the rotation of the nut 2. When the nut 2 is loosened and rotated, the nut 2 cannot compress the spring sheet 5, and the spring sheet 5 is stuck in the groove 14. The nut 2 will be blocked from rotating by the spring sheet 5. One side of the nut 2 is provided with a plurality of grooves 14 that match the spring sheet 5. The outer side of the joint body 1 is provided with an external thread 7, and the inner side of the spring sheet 5 is provided with a second internal thread 17 that matches the external thread 7. The inner side of the nut 2 is provided with a first internal thread 16 that matches the external thread 7. The thread rotation direction of the second internal thread 17 is opposite to that of the first internal thread 16, so that the tightening or loosening direction of the retaining ring 4 is opposite to that of the nut 2. When the nut 2 tends to loosen due to vibration The nut 2 is in a state of being rotated in a direction in which the spring sheet 5 is compressed, and the nut 2 tends to rotate with the snap ring 4 through the spring sheet 5. The snap ring 4 is in a direction of being rotated in a direction of tightening, and the snap ring 4 is already in close contact with the joint body 1. The snap ring 4 cannot rotate, and the nut 2 cannot rotate either, thereby preventing the nut 2 from loosening, ensuring that the clamping sealing sleeve 9 maintains a good sealing effect. A guide cone ring 3 is installed inside the nut 2, and a connecting ring 13 is provided on one side of the guide cone ring 3. The connecting ring 13 is used to fit with the nut 2 to ensure the stability of the guide cone ring 3. A conical portion 15 is provided on the other side of the guide cone ring 3. The conical portion 15 on the guide cone ring 3 can be uniformly moved toward the clamping claws 12 Apply force evenly to make the clamping claws 12 contract evenly and push the clamping sealing sleeve 9 close to the cable to achieve a better sealing effect. A film 11 is provided at one end of the clamping sealing sleeve 9. The cable can directly penetrate the film 11 during installation. The film 11 is wrapped around the outside of the cable to improve the sealing performance. A convex edge 10 is provided on the outside of the clamping sealing sleeve 9. The convex edge 10 is convenient for limiting the clamping sealing sleeve 9. An inner wall of the connector body 1 is provided with an indentation 8. The indentation 8 is used to block the convex edge 10, thereby limiting the clamping sealing sleeve 9. An O-ring 6 is installed on the outside of the connector body 1. When the end of the connector body 1 away from the nut 2 is connected to the equipment, the O-ring 6 can improve the sealing performance.

[0016] The material of the clamping ring 4 and the spring piece 5 is stainless steel, and the material of the guide cone ring 3 is nylon.

[0017] Specifically, when in use, first put the connector body 1 on the outside of the cable, then put the clamping claw 12 on the outside of the clamping sealing sleeve 9, and then put the clamping claw 12 and the clamping sealing sleeve 9 on the outside of the cable. One end of the cable will directly penetrate the film 11, and the clamping claw 12 and the clamping sealing sleeve 9 will enter the connector body 1 until the convex edge 10 is blocked by the retracted portion 8. Then, screw the clamping ring 4 to the outside of the connector body 1 until the clamping ring 4 is blocked by the connector body 1 and cannot rotate. Finally, screw the nut 2 to the outside of the connector body 1, and the nut 2 moves in the direction close to the clamping ring 4. When the nut 2 is about to contact the snap ring 4, pinch the snap ring 4 to fix it to prevent the nut 2 from loosening due to the spring sheet 5. Tighten the nut 2 to make the nut 2 and the spring sheet 5 fit tightly. The spring sheet 5 is inserted into the groove 14. The nut 2 will drive the guide cone ring 3 to move while moving. The conical portion 15 on the guide cone ring 3 squeezes the clamping claw 12 to shrink it. The contraction of the clamping claw 12 pushes the clamping sealing sleeve 9 to fit the cable, thereby sealing. When the nut 2 tends to loosen due to vibration, the spring sheet 5 cooperates with the groove 14 to prevent the nut 2 from loosening, thereby ensuring a good sealing effect.

[0018] In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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 understood as a limitation on the present invention.

[0019] In addition, the terms "first", "second", "third" and "fourth" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first", "second", "third" and "fourth" may explicitly or implicitly include at least one of such features.

[0020] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it 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 a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0021] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An explosion-proof cable clamping and sealing joint, comprising a joint body (1), a clamping sealing sleeve (9) arranged inside the joint body (1), a clamping claw (12) sleeved on the outside of the clamping sealing sleeve (9), and a nut (2) threadedly connected to the outside of the joint body (1), characterized in that: The outer side of the joint body (1) is threadedly connected to a clamping ring (4); a side of the clamping ring (4) close to the nut (2) is provided with a plurality of spring pieces (5) equidistantly distributed in an annular shape; a side of the nut (2) is provided with a plurality of grooves (14) matching with the spring pieces (5); an outer side of the joint body (1) is provided with an external thread (7); an inner side of the spring piece (5) is provided with a second internal thread (17) matching with the external thread (7); an inner side of the nut (2) is provided with a first internal thread (16) matching with the external thread (7); and a second internal thread (17) matching with the external thread (7) is provided. The thread rotation direction of the thread (17) is opposite to that of the first internal thread (16); a guide cone ring (3) is installed inside the nut (2); a connecting ring (13) is provided on one side of the guide cone ring (3); a conical portion (15) is provided on the other side of the guide cone ring (3); a film (11) is provided at one end of the clamping sealing sleeve (9); a convex edge (10) is provided on the outer side of the clamping sealing sleeve (9); an inner side wall of the joint body (1) is provided with an indented portion (8); and an O-ring (6) is installed on the outer side of the joint body (1).

2. The explosion-proof cable clamping and sealing joint according to claim 1 is characterized in that: The material of the clamping ring (4) and the spring sheet (5) is stainless steel, and the material of the guide cone ring (3) is nylon.

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