Pipe fitting with air leakage detection function

Abstract

The utility model discloses a pipe fitting with air leakage detection, which comprises a pipe, two ends of the pipe are provided with sealing elements, the sealing elements are made of elastic materials, each sealing element comprises a body, one end of each body is provided with a bulge, the bulge extends into the end part of the pipe, and the pipe is provided with an air leakage detector. The body is provided with a protrusion, the protrusion is in close contact with the inner wall of the tube to form sealing, a through hole is formed in the body, a needle for gas injection penetrates through the through hole, a containing cavity with the diameter larger than that of other portions of the through hole is formed in the middle of the through hole, and a sealing ball is arranged in the containing cavity.

Description

Technical Field

[0001] The invention relates to a pipe fitting with gas leakage detection function. Background Art

[0002] The tube body can be divided into different types according to the carriers carried inside. The more common ones on the market are air pipes and liquid pipes. For different types of tube bodies, the first prerequisite for qualification is sealing. At present, the tube bodies produced in the industry are determined based on the qualification rate of the enterprise in the province to determine the probability of product leakage. Most of them are sold first, and if there is leakage (or liquid leakage), they are returned to the manufacturer. However, this is bound to cause many inconveniences. For example, if there is a water pipe leak, the previously installed water pipes must be removed, increasing labor costs; and if there is a gas pipe leak after the pipe body is installed, there is a great safety hazard. Therefore, it is currently necessary to design a tube body that can detect whether there is a leak in the product before the tube body is sold out of the factory.

[0003] Patent CN203963376U discloses a pipe with air leakage detection, including a pipe body, and the two ends of the pipe body are respectively provided with a seal and a valve core, and the seal and the valve core make the pipe body in a fully closed state. Both ends of the pipe body are sealed with seals, and the valve core is inflated with an air pump. After a period of time, the air pressure change in the pipe body is monitored by an air pressure monitor to monitor whether the pipe body is leaking.

[0004] When this type of pipe is sold to customers, customers can know whether the pipe is sealed by pressing the valve core to see if there is gas coming out of the valve core. However, there are also problems. The cost of the valve core is relatively high, and after the pipe is delivered to the customer, the seal and valve core are disposable, which causes waste. Summary of the invention

[0005] The purpose of the present invention is to provide a pipe fitting with air leakage detection, which eliminates the original valve core, greatly reduces the cost, and can still realize the air leakage detection function.

[0006] To achieve the above purpose, the present invention provides the following technical solutions: a pipe with gas leakage detection, comprising a pipe, a sealing member is arranged at both ends of the pipe, the sealing member is made of elastic material, the sealing member comprises a body, one end of the body has a protrusion, the protrusion extends into the end of the pipe, the protrusion is in close contact with the inner wall of the pipe to form a seal, the body is provided with a through hole, the through hole is for the needle of gas injection to pass through, the middle of the through hole has a cavity with a diameter larger than other parts of the through hole, and the cavity has a sealing ball. When in use, the sealing members are plugged at both ends of the pipe, and then the needle tube is used to inject gas into the through hole. After the gas is injected, the pressure in the pipe is greater than the pressure outside. The existence of this pressure difference pushes the sealing ball to block the outer side of the cavity to prevent the gas from escaping. When arriving at the destination, only a needle needs to be inserted into the through hole to push the sealing ball away from the outer side of the cavity. At this time, if the pipe does not leak, the high-pressure gas in the pipe will be blown out through the through hole to produce a sound, and the quality of the pipe can be judged by this sound. This structure eliminates the original valve core, greatly reducing costs, while still being able to achieve the air leakage detection function.

[0007] In the above technical solution, preferably, the cavity has a circle of conical surface on the outer side. The conical surface can guide the sealing ball and allow the sealing ring to achieve better sealing.

[0008] In the above technical solution, preferably, the through hole is provided with a plurality of slits on the inner side of the cavity, so that the sealing ball can be easily inserted into the cavity.

[0009] In the above technical solution, preferably, the outer ring of the protrusion has several retaining rings, and the height of each retaining ring gradually increases from the inside to the outside. With this design, the seal is easy to insert and not easy to come out.

[0010] In the above technical solution, preferably, an outer end face of each retaining ring is a vertical face.

[0011] In the above technical solution, preferably, retaining rings cooperating with the retaining ring are arranged on the inner walls of both ends of the tube, and the retaining rings are in contact with the vertical surface.

[0012] In the above technical solution, preferably, the outer ring of the seal is wrapped around the end of the tube, the outer ring of the seal has a circle of annular grooves, and a circle of cable ties is arranged on the annular grooves.

[0013] The present invention has at least the following beneficial effects: when in use, seals are plugged at both ends of the tube, and then a needle is used to inject gas into the through hole. After the gas is injected, the pressure inside the tube is greater than the external pressure. The existence of this pressure difference pushes the sealing ball to block the outer side of the cavity to prevent the gas from escaping. When arriving at the destination, only a needle needs to be inserted into the through hole to push the sealing ball away from the outer side of the cavity. At this time, if the tube does not leak, the high-pressure gas in the tube will be blown out through the through hole, producing a sound, and the quality of the tube can be judged by this sound. This structure eliminates the original valve core, greatly reduces the cost, and can still realize the leakage detection function. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the present invention.

[0015] Figure 2 for Figure 1 sectional view of .

[0016] Figure 3 A schematic diagram of a seal. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] See also Figure 1-3 A pipe fitting with air leakage detection includes a pipe 1, and sealing members 2 are arranged at both ends of the pipe 1. The sealing member 2 is made of elastic material. The sealing member 2 includes a body 2a, and one end of the body has a protrusion 21. The protrusion 21 extends into the end of the pipe 1, and the protrusion 21 is in close contact with the inner wall of the pipe 1 to form a seal.

[0019] The body 2a is provided with a through hole 22, through which the needle of the gas injection passes, and the middle of the through hole 22 has a cavity 23 with a diameter larger than other parts of the through hole 22, and a sealing ball 3 is arranged in the cavity 23. The cavity 23 has a circle of conical surface 231 on the outer side. The conical surface 231 can guide the sealing ball 3, so that the sealing ring can better achieve sealing.

[0020] The through hole 22 has several slits 221 on the inner side of the cavity 23. This design makes it easy to insert the sealing ball into the cavity.

[0021] The outer ring of the protrusion 21 has several retaining rings 211, and the height of each retaining ring 211 gradually increases from the inside to the outside. The end face of each retaining ring 211 on the outside is a vertical surface. The inner walls at both ends of the tube 1 are provided with retaining rings 11 that match the retaining rings, and the retaining rings 11 are in contact with the vertical surfaces. With this design, the seal is easy to insert and not easy to remove.

[0022] The outer ring of the sealing member 2 is wrapped around the end of the pipe. The outer ring of the sealing member 2 has a circle of annular groove 24 , and a circle of cable tie 4 is arranged on the annular groove 24 .

[0023] When in use, seals are plugged at both ends of the tube, and then a needle is used to inject gas into the through hole. After the gas is injected, the pressure inside the tube is greater than the external pressure. The existence of this pressure difference pushes the sealing ball to block the outer side of the cavity to prevent the gas from escaping. When arriving at the destination, you only need to insert a needle into the through hole to push the sealing ball out of the outer side of the cavity. At this time, if the tube is not leaking, the high-pressure gas in the tube will blow out through the through hole and produce a sound. The quality of the tube can be judged by this sound. This structure eliminates the original valve core, greatly reducing the cost, and still can realize the leakage detection function.

[0024] 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. A pipe fitting with air leakage detection, comprising a pipe, both ends of which are provided with sealing members, characterized in that: The seal is made of elastic material and includes a body. One end of the body has a protrusion, which extends into the end of the tube. The protrusion is in close contact with the inner wall of the tube to form a seal. The body is provided with a through hole for the injection needle to pass through. The middle of the through hole has a cavity with a diameter larger than that of other parts of the through hole, and the cavity has a sealing ball.

2. The pipe fitting with air leakage detection according to claim 1, characterized in that: The cavity has a circle of conical surface on the outer side.

3. The pipe fitting with air leakage detection according to claim 1, characterized in that: The through hole has a plurality of gaps on the inner side of the cavity.

4. The pipe fitting with air leakage detection according to claim 1, characterized in that: The outer ring of the protrusion has several retaining rings, and the height of each retaining ring gradually increases from the inside to the outside.

5. The pipe fitting with air leakage detection according to claim 4, characterized in that: An outer end surface of each retaining ring is a vertical surface.

6. The pipe fitting with air leakage detection according to claim 5, characterized in that: The inner walls at both ends of the tube are provided with retaining rings matched with the retaining ring, and the retaining rings are fitted with the vertical surface.

7. The pipe fitting with air leakage detection according to claim 1, characterized in that: The outer ring of the sealing member is wrapped around the end of the tube, and the outer ring of the sealing member has a circle of annular grooves, on which a circle of cable ties is arranged.

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