Cable waterproof joint

Abstract

The utility model provides a cable waterproof joint, and belongs to the field of electrical technology. The cable waterproof joint solves the problem that an existing cable waterproof joint is insufficient in waterproof performance. According to the cable waterproof connector, a connector containing cavity is formed in the middle of the interior of a connector base, locking caps are connected to the front end and the rear end of the connector base in a threaded mode, a wire fixing rubber pipe and a clamping ring arranged on the wire fixing rubber pipe in a sleeving mode are arranged in the locking caps, an annular mounting groove is formed between an inner mounting ring and an outer mounting ring, and a first sealing ring arranged on the inner mounting ring in a sleeving mode is arranged in the mounting groove; an annular sealing lip is arranged on the outer circumferential face of the first sealing ring, the inner end of the locking cap extends into the mounting groove and is in threaded connection with the inner circumferential face of the outer mounting ring, a second sealing ring is arranged on the bottom face of the mounting groove, the inner end face of the locking cap abuts against the second sealing ring, and the sealing lip is tightly attached to the inner circumferential face of the inner end of the locking cap. According to the structure, the sealing and waterproof effects of the joint of the locking cap and the joint seat are remarkably improved, and the overall waterproof effect of the waterproof joint is further improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to electrical technical field, especially a cable waterproof joint. BACKGROUND

[0002] The thermal control equipment group of the thermal power plant is generally connected by cables, and the connection of the cables needs to be completed by the joint terminals. However, the commonly used joint terminals between the cables have poor sealing performance, which directly leads to poor waterproof performance.

[0003] The cable on the market is mainly composed of a base, a rubber tube, a clamping ring and a locking cap. The rubber tube is arranged in the base, the clamping ring is sleeved on the rubber tube, and the locking cap is screwed on the base. The cable passes through the base, the rubber tube and the locking cap, and then the locking cap is tightened. The end of the clamping ring is extruded by the locking cap, the end of the rubber tube is extruded by the clamping ring, the inner wall of the end of the rubber tube is tightly attached to the outer circumferential surface of the cable, and waterproof is achieved. However, this structure has the following defects: the locking cap and the base are generally connected by threads. Since the waterproof joint is generally exposed to the external environment, the threaded connection is not absolutely sealed, and water can easily enter the locking cap from the threaded connection between the locking cap and the base, which may flow into the joint between the cables. UTILITY MODEL CONTENTS

[0004] The utility model aims at the above problems existing in the prior art, and provides a cable waterproof joint. The technical problem to be solved by the utility model is how to improve the waterproof performance of the existing cable waterproof joint.

[0005] The utility model can be realized by the following technical scheme:

[0006] A cable waterproof joint comprises a joint base, a joint containing cavity is formed in the middle of the joint base, locking caps are screwed on the front and rear ends of the joint base, a wire fixing rubber tube and a clamping ring sleeved on the wire fixing rubber tube are arranged in the locking cap, part of the wire fixing rubber tube and the clamping ring extends into the joint base, characterized in that the front and rear ends of the joint base are provided with an inner mounting ring and an outer mounting ring located outside the inner mounting ring, an annular mounting groove is formed between the inner mounting ring and the outer mounting ring, a sealing ring one sleeved on the inner mounting ring is arranged in the mounting groove, an annular sealing lip is arranged on the outer circumferential surface of the sealing ring one, an inner thread is formed on the inner circumferential surface of the outer mounting ring, the inner end of the locking cap extends into the mounting groove and is threadedly connected with the inner circumferential surface of the outer mounting ring, a sealing ring two is arranged on the bottom surface of the mounting groove, the inner end surface of the locking cap abuts against the sealing ring two, and the sealing lip is tightly attached to the inner circumferential surface of the inner end of the locking cap.

[0007] The joint between the cable and the cable is located in a joint accommodating cavity, the cable passes through a wire fixing rubber tube and a locking cap, one end of the locking cap is located in a mounting groove and is threadedly connected with an outer mounting ring, the locking cap is moved towards the inside of the mounting groove by rotating the locking cap, the locking cap gradually extrudes the end of the clamping ring, the end of the wire fixing rubber tube is extruded by the clamping ring, the inner wall of the end of the rubber tube is tightly attached to the outer circumferential surface of the cable, and water-proof is realized at the position. When one end of the locking cap abuts against the sealing ring two, the sealing ring two seals the threaded connection part between the locking cap and the outer mounting ring, in addition, the lip of the sealing lip is tightly attached to the inner circumferential surface of the locking cap during the movement of the end of the locking cap towards the bottom surface of the mounting groove, a second sealing is provided, the sealing and water-proof effect of the connection part between the locking cap and the joint seat is significantly improved, and the overall water-proof effect of the water-proof joint is further improved.

[0008] In the above-mentioned cable water-proof joint, the sealing lip has a plurality of sealing lips, and all the sealing lips are arranged at intervals along the axial direction of the sealing ring two. The sealing lip has a plurality of sealing lips, and the plurality of sealing lips form a plurality of seals, and the plurality of seals have very good sealing effect after being superimposed.

[0009] In the above-mentioned cable water-proof joint, the sealing lip is arranged in the mounting direction of the locking cap. When the sealing ring one leaks, the water pressure extrudes the sealing lip after the water is gathered on one side of the sealing lip, the lip of the sealing lip is more tightly attached to the inner circumferential surface of the locking cap, and the water-proof effect of the sealing lip is improved.

[0010] In the above-mentioned cable water-proof joint, an outer hexagonal boss is arranged on the outer circumferential surface of the middle part of the locking cap. The outer hexagonal boss is arranged to facilitate the rotation of the locking cap by using a wrench or other tools, and facilitates the installation of the locking cap.

[0011] In the above-mentioned cable water-proof joint, a guide boss in the shape of a ring is arranged on the front and back sides of the joint accommodating cavity, one end of the wire fixing rubber tube abuts against the end surface of the guide boss, one end of the clamping ring is located between the inner mounting ring and the wire fixing rubber tube, and a tapered guide surface is formed on the side surface of the guide boss towards the inside of the joint accommodating cavity. The guide surface is arranged to facilitate the accurate passing of the cable into the wire fixing rubber tube through the guide surface, improve the convenience of the assembly of the cable and the joint, and the guide boss also limits the installation of the wire fixing rubber tube.

[0012] Compared with the prior art, the cable water-proof joint has the following advantages: when one end of the locking cap abuts against the sealing ring two, the sealing ring two seals the threaded connection part between the locking cap and the outer mounting ring, in addition, the lip of the sealing lip is tightly attached to the inner circumferential surface of the locking cap during the movement of the end of the locking cap towards the bottom surface of the mounting groove, a second sealing is provided, the sealing and water-proof effect of the connection part between the locking cap and the joint seat is significantly improved, and the overall water-proof effect of the water-proof joint is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is a sectional structure schematic view of the utility model.

[0014] Figure 2 is a local three-dimensional structure schematic view of the utility model.

[0015] In the figure, 1, joint seat; 10, inner mounting ring; 11, outer mounting ring; 12, guide boss; 120, guide surface; 2, joint accommodating cavity; 3, locking cap; 30, outer hexagonal boss; 4, wire fixing rubber tube; 5, clamping ring; 6, mounting groove; 7, sealing ring one; 70, sealing lip; 8, sealing ring two. DETAILED DESCRIPTION

[0016] The following is a specific embodiment of the utility model and further describes the technical scheme of the utility model in combination with the drawings, but the utility model is not limited to these embodiments.

[0017] As Figure 1 and Figure 2As shown, the cable waterproof joint comprises a joint seat 1, the middle part of the joint seat 1 has a joint accommodating cavity 2, the front and rear ends of the joint seat 1 are screwed with locking caps 3, the outer circumferential surface of the middle part of the locking cap 3 is provided with an outer hexagonal boss 30, the locking cap 3 is provided with a wire fixing rubber tube 4 and a clamping ring 5 sleeved on the wire fixing rubber tube 4, part of the wire fixing rubber tube 4 and the clamping ring 5 extends into the joint seat 1, the front and rear ends of the joint seat 1 are provided with an inner mounting ring 10 and an outer mounting ring 11 located outside the inner mounting ring 10, an annular mounting groove 6 is formed between the inner mounting ring 10 and the outer mounting ring 11, the mounting groove 6 is provided with a sealing ring I 7 sleeved on the inner mounting ring 10, the outer circumferential surface of the sealing ring I 7 is provided with an annular sealing lip 70, the inner circumferential surface of the outer mounting ring 11 is provided with an internal thread, the inner end of the locking cap 3 extends into the mounting groove 6 and is threadedly connected with the inner circumferential surface of the outer mounting ring 11, the bottom surface of the mounting groove 6 is provided with a sealing ring II 8, the inner end surface of the locking cap 3 abuts against the sealing ring II 8, and the sealing lip 70 is tightly attached to the inner circumferential surface of the inner end of the locking cap 3. The joint between the cables is located in the joint accommodating cavity 2, the cables pass through the wire fixing rubber tube 4 and the locking cap 3, one end of the locking cap 3 is located in the mounting groove 6 and is threadedly connected with the outer mounting ring 11, the locking cap 3 is moved towards the inside of the mounting groove 6 by rotating the locking cap 3, the end of the clamping ring 5 is gradually pressed by the locking cap 3, the end of the wire fixing rubber tube 4 is pressed by the clamping ring 5, the inner wall of the end of the wire fixing rubber tube 4 is tightly attached to the outer circumferential surface of the cable, and the waterproof effect at this position is realized. After one end of the locking cap 3 abuts against the sealing ring II 8, the sealing ring II 8 seals the threadedly connected part of the locking cap 3 and the outer mounting ring 11, in addition, the lip of the sealing lip 70 is tightly attached to the inner circumferential surface of the locking cap 3 during the movement of the end of the locking cap 3 towards the bottom surface of the mounting groove 6, a second sealing is provided, the sealing and waterproof effect of the connection between the locking cap 3 and the joint seat 1 is significantly improved, and the overall waterproof effect of the waterproof joint is further improved. The sealing lip 70 is towards the mounting direction of the locking cap 3, when the sealing ring I 7 leaks, when water accumulates on one side of the sealing lip 70, the water pressure presses the sealing lip 70, the lip of the sealing lip 70 is more tightly attached to the inner circumferential surface of the locking cap 3, and the waterproof effect of the sealing lip 70 is improved.

[0018] As Figure 1 shown, the sealing lip 70 has a plurality of sealing lips 70, and all the sealing lips 70 are arranged in the axial direction of the sealing ring II 8. The plurality of sealing lips 70 form multiple seals, and the multiple seals have very good sealing effect after superposition.

[0019] As Figure 1 shown, the front and rear sides of the joint accommodating cavity 2 are provided with annular guide bosses 12, one end of the wire fixing rubber tube 4 abuts against the end surface of the guide boss 12, one end of the clamping ring 5 is located between the inner mounting ring 10 and the wire fixing rubber tube 4, and the side surface of the guide boss 12 towards the inside of the joint accommodating cavity 2 is formed with a tapered guide surface 120.

[0020] The specific embodiments described herein are merely illustrative of the spirit of the present application. Those skilled in the art of the present application can make various modifications or supplements to the described specific embodiments or replace them with similar ways, but will not deviate from the spirit of the present application or exceed the scope defined by the appended claims.

Claims

1. A cable waterproof joint, comprising a joint seat (1), a middle part of the joint seat (1) having a joint accommodating cavity (2), a locking cap (3) being screwed on the front and rear ends of the joint seat (1), a wire fixing rubber tube (4) and a clamping ring (5) sleeved on the wire fixing rubber tube (4) being arranged in the locking cap (3), parts of the wire fixing rubber tube (4) and the clamping ring (5) extending into the joint seat (1), characterized in that, The front and rear ends of the joint base (1) are provided with an inner mounting ring (10) and an outer mounting ring (11) outside the inner mounting ring (10), an annular mounting groove (6) is formed between the inner mounting ring (10) and the outer mounting ring (11), the mounting groove (6) is provided with a sealing ring I (7) sleeved on the inner mounting ring (10), the outer circumferential surface of the sealing ring I (7) is provided with an annular sealing lip (70), the inner circumferential surface of the outer mounting ring (11) is provided with an internal thread, the inner end of the locking cap (3) extends into the mounting groove (6) and is threadedly connected with the inner circumferential surface of the outer mounting ring (11), the bottom surface of the mounting groove (6) is provided with a sealing ring II (8), the inner end surface of the locking cap (3) abuts against the sealing ring II (8), and the sealing lip (70) is tightly attached to the inner circumferential surface of the inner end of the locking cap (3).

2. A cable water-block joint according to claim 1, characterised in that, The sealing lip (70) has a plurality of sealing lips (70), and all the sealing lips (70) are arranged in an axial direction of the sealing ring II (8).

3. A cable water-block joint according to claim 2, wherein The sealing lip (70) is arranged in the installation direction of the locking cap (3).

4. A cable water-block joint according to claim 1, wherein An outer hexagonal boss (30) is arranged on the outer circumferential surface of the middle part of the locking cap (3).

5. A cable water-block joint according to claim 1, wherein The front and rear sides of the joint accommodating cavity (2) are provided with annular guide bosses (12), one end of the wire fixing rubber tube (4) abuts against the end surface of the guide boss (12), one end of the clamping ring (5) is located between the inner mounting ring (10) and the wire fixing rubber tube (4), and the side surface of the guide boss (12) towards the inside of the joint accommodating cavity (2) is formed with a tapered guide surface (120).

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