Connector capable of achieving pressure relief in certain direction and reverse sealing only by installing O-shaped ring

Abstract

The utility model discloses a joint capable of realizing pressure relief in a certain direction and reverse sealing only by installing an O-shaped ring, which belongs to the technical field of underwater cable joints and comprises a male joint and a female joint. The male joint and the female joint are matched to realize cable butt joint; the male joint comprises a fixed head part and an assembly head part; one end of the assembly head is fixedly connected with the fixed head, and the other end is used for plugging a butt joint part of a female joint; the fixed head part and the fixed part of the female joint are both used for fixing a cable to be butted; the outer side wall of the assembly head is provided with two sealing grooves which are concavely arranged inwards, the O-shaped sealing rings are arranged in the sealing grooves, and the protrusions are arranged to jack up a part, so that the jacked-up part can slide in the pressure relief cavity and the sealing cavity under the action of internal pressure and external pressure, and pressure relief from the inside to the outside and reverse sealing are achieved. The utility model has the advantages that the structure is simple, the butt joint in water is convenient, and the sealing failure can be avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of water cable joint, more specifically relates to a joint that can realize certain pressure relief and reverse sealing by only installing O type ring. BACKGROUND

[0002] In water operation, cable connection is connected through water terminal box, and the water terminal box is usually made of material with good sealing performance, water does not enter the terminal box, and the joint of the two cables is protected from water and failure; however, when the terminal box is placed in water, the inside is hollow, the outside receives water pressure, and uneven force on the terminal box causes floating, which easily causes damage to the cable due to pulling and pulling. At the same time, the hollow state of the terminal box, when diving into deep water, the internal and external pressure difference is too large, the sealing ring is invalid, the water enters the terminal box, thereby destroying the original electrical insulation and causing electrical connection failure. Therefore, how to provide a joint that can realize certain pressure relief and reverse sealing by only installing O type ring is a problem to be solved by those skilled in the art. CONTENT OF THE UTILITY MODEL

[0003] Therefore, the utility model provides a joint that can realize certain pressure relief and reverse sealing by only installing O type ring, which has the advantages of simple structure, convenient water butt joint and simultaneous internal and external pressure relief and reverse sealing.

[0004] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0005] A joint that can realize certain pressure relief and reverse sealing by only installing O type ring, comprising a male joint and a female joint; the male joint and the female joint cooperate to realize cable butt joint; the male joint comprises a fixed head and an assembly head; one end of the assembly head is fixedly connected with the fixed head, and the other end is used for inserting the butt joint part of the female joint; the fixed head and the fixed part of the female joint are used for fixing the cables to be butt jointed; two inwardly recessed sealing grooves are arranged on the outer side wall of the assembly head for arranging O type sealing rings; the sealing groove comprises a sealing cavity and a pressure relief cavity; the sealing cavity and the pressure relief cavity are communicated, and the connection part is smoothly arranged; the O type sealing ring moves back and forth in the sealing cavity and the pressure relief cavity.

[0006] Further, a through cable fixing hole is arranged in the fixed head, the hole diameter is smaller than the cable diameter of the cable to be butt jointed, and the hole is used for interference fit with the cable.

[0007] Further, an assembly head is arranged in the assembly head, which is used for butt jointing with the fixed cable of the female joint.

[0008] Further, the sealing cavity is arranged along the outer end surface of the assembly head in a circumferential direction, and is bent towards the fixed head at the pressure relief cavity, and a side surface forms a protrusion; and a middle part of the pressure relief cavity is bent towards the fixed head.

[0009] Further, a bottom part of the pressure relief cavity is recessed towards the inside of the sealing groove; and a diameter of the bottom part of the pressure relief cavity is smaller than a diameter of the bottom part of the sealing cavity.

[0010] The utility model discloses beneficial effect lies in:

[0011] The utility model provides a joint that can realize certain direction pressure relief and reverse sealing only by installing O type ring, by setting up sealing groove on the outside wall of the male joint, including sealing cavity and pressure relief cavity, O type sealing ring is arranged in the sealing cavity, and the O type sealing ring is located the pressure relief cavity section can slide in the pressure relief cavity and the sealing cavity under the action of internal pressure and external pressure, and only by setting O type sealing ring can realize internal pressure relief and reverse sealing to the outside. And the joint structure of the utility model is simple, is convenient for the quick butt joint in water and can avoid sealing failure. BRIEF DESCRIPTION OF DRAWINGS

[0012] In order to more clearly illustrate the technical scheme in the embodiment of the utility model or prior art, below will to the drawing needed to be used in the embodiment or prior art description simple introduction, obviously, the drawing in the following description only the embodiment of the utility model, for the ordinary skilled person in the art comes, under the premise of not paying creative labor, still can obtain other drawings according to the provided drawing.

[0013] Figure 1 It is the structural schematic diagram of the utility model.

[0014] Figure 2 It is the top view of the utility model.

[0015] Figure 3 It is the front view of the utility model.

[0016] Figure 4 It is Figure 3 A-A section view in the middle.

[0017] Figure 5 It is Figure 4 B enlarged view in the middle.

[0018] Among them, in the drawing:

[0019] 1-assembly head;2-fixed head;3-butting cavity;4-sealing groove;5-protrusion;6-cable fixing through hole;7-pressure relief cavity;8-sealing cavity. DETAILED DESCRIPTION

[0020] Clearly, the described embodiments are merely a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0021] Please refer to the accompanying Figures 1-5 The present application provides a joint which can realize pressure relief in a certain direction and reverse sealing by only installing an O-shaped ring, comprising a male joint and a female joint; the male joint cooperates with the female joint (not shown in the figure) to realize cable butt joint.

[0022] The male joint comprises a fixed head 2 and an assembly head 1; one end of the assembly head 1 is fixedly connected with the fixed head 2, and the other end is used for butt joint with the female joint; the fixed head 2 is internally provided with a through cable fixing through hole 6, the hole diameter of which is smaller than the cable diameter of the cable to be butt jointed, so that the fixed head 2 is in interference fit with the cable, thereby realizing sealing at the cable fixing through hole 6; the assembly head 1 is internally provided with a butt joint cavity 3 for butt joint with the cable at the end of the female joint, and two inwardly recessed sealing grooves 4 are arranged on the outer wall of the assembly head 1 for arranging O-shaped sealing rings. The female joint comprises a butt joint part for cooperating with the assembly head 1 and a fixed part for fixing the cable to be butt jointed. The butt joint part of the female joint is sleeved on the assembly head 1 of the male joint to realize butt joint of the male joint and the female joint, and the O-shaped sealing ring is used for sealing the gap between the female joint and the male joint.

[0023] The inner wall of the sealing groove 4 is arc-shaped, used for abutting the O-shaped sealing ring, comprising a sealing cavity 8 and a pressure relief cavity 7; the sealing cavity 8 and the pressure relief cavity 7 are through, and the connection part is smoothly arranged; the sealing cavity 8 is arranged along the outer end surface of the assembly head 1 in the circumferential direction, is bent to one side of the fixed head 2 at the pressure relief cavity 7, so that the side surface forms a protrusion 5; meanwhile, the middle part of the pressure relief cavity 7 is bent to one side of the fixed head 2, and the bottom part is recessed into the sealing groove 4, as shown in the accompanying Figure 5 The diameter of the bottom part of the pressure relief cavity 7 is smaller than the diameter of the bottom part of the sealing cavity 8. The O-shaped sealing ring is arranged in the sealing cavity 8, and due to the arrangement of the protrusion 5, a part of the O-shaped sealing ring is lifted up, so that the lifted part of the O-shaped sealing ring can slide into the pressure relief cavity 7. After the lifted part of the O-shaped sealing ring slides into the pressure relief cavity 7, a gap is generated between the outer side surface of the O-shaped sealing ring and the inner wall of the female joint, so that water flow can pass through.

[0024] The utility model discloses a working principle is: the cable that needs to butt joint respectively passes through male joint and female joint, and is fixed position through the fixed part of fixed head 2 and female joint, and produces sealing, when the butt joint of joint in water, the sealing groove 4 inside of male joint sets up O type sealing ring, at this time O type sealing ring with convex 5 place to the fixed head 2 side top up a part, when assembling head 1 extends into female joint's butt joint part, the water of excess in butt joint cavity 3 flows outward, and water flow pushes the part of O type sealing ring that is top up and slides into pressure relief chamber 7, make the outside of O type sealing ring and the clearance between female joint's inner wall, and water flow can flow to the outside through the clearance. When water flow stops, and the water pressure of outside is greater than the water pressure in butt joint cavity 3, and the top up part of O type sealing ring is toped back into sealing cavity 8 and is tightly attached to convex 5 by the water pressure of outside, make O type sealing ring seal the clearance between female joint and male joint, thereby realize internal pressure relief and reverse sealing to the outside. Although still contain water in butt joint cavity 3, but male joint and female joint make the water isolation of inside and outside, form the open circuit, namely avoid the risk that cable forms short circuit at the butt joint place due to the reason of leakage.

[0025] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the difference from other embodiments, and the same or similar parts between various embodiments can be referred to each other. For the device disclosed by the embodiments, since it corresponds to the method disclosed by the embodiments, the description is relatively simple, and the related parts can be referred to the method part.

[0026] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the utility model. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the utility model. Therefore, the utility model will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A joint that can achieve pressure relief in one direction and reverse sealing by only installing an O-ring, characterized in that: The invention comprises a male connector and a female connector; the male connector cooperates with the female connector to realize cable docking; the male connector comprises a fixed head (2) and an assembly head (1); one end of the assembly head (1) is fixedly connected to the fixed head (2), and the other end is used to plug into the docking part of the female connector; the fixed head (2) and the fixed part of the female connector are both used to fix the cables to be docked; two sealing grooves (4) recessed inwardly are provided on the outer wall of the assembly head (1) for arranging an O-ring; the sealing groove (4) comprises a sealing chamber (8) and a pressure relief chamber (7); the sealing chamber (8) is connected to the pressure relief chamber (7), and the connection between them is smooth; the O-ring is located in the pressure relief chamber (7) and moves back and forth in the sealing chamber (8) and the pressure relief chamber (7).

2. A joint according to claim 1 that can achieve pressure relief in one direction and reverse sealing by only installing an O-ring, characterized in that: A through cable fixing through hole (6) is provided inside the fixed head (2), the hole diameter of which is smaller than the diameter of the cable to be docked, and is used for interference fit with the cable.

3. A joint according to claim 1 that can achieve pressure relief in one direction and reverse sealing by only installing an O-ring, characterized in that: A docking cavity (3) is provided inside the assembly head (1) for docking with a cable fixed to a female connector.

4. A joint according to claim 1 that can achieve pressure relief in one direction and reverse sealing by only installing an O-ring, characterized in that: The sealing cavity (8) is arranged along the circumference of the outer end surface of the assembly head (1), and is bent toward the side of the fixed head (2) at the pressure relief cavity (7), with a bulge (5) formed on the side; the middle part of the pressure relief cavity (7) is bent toward the side of the fixed head (2).

5. A joint according to claim 4 that can achieve pressure relief in one direction and reverse sealing by only installing an O-ring, characterized in that: The bottom of the pressure relief chamber (7) is recessed toward the interior of the sealing groove (4); the diameter of the bottom of the pressure relief chamber (7) is smaller than the diameter of the bottom of the sealing chamber (8).

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