CN203811338U - Tubing gas permeability testing device - Google Patents

Abstract

The utility model relates to a gas permeability testing device for pipes, in particular to the gas permeation test for pipes made of plastic and metal materials, which belongs to the category of testing equipment. The test device includes a lower body and an upper body connected by bolts, a cavity is provided at the center of the lower body, and through holes are provided on the lower part and the side of the cavity, and the upper end surface of the lower body and the cavity A sealing groove is arranged on the periphery, the height of the outer wall of the sealing groove is higher than that of the inner wall, and the height of the lower end surface of the upper body is higher than the height difference between the outer wall and the inner wall of the sealing groove. The testing device of the utility model has reasonable design structure, simple structure, low cost and convenient operation, and is suitable for gas permeability testing of various pipe materials.

Description

A device for testing the gas permeability of pipes

technical field

The utility model relates to a gas permeability testing device for pipes, in particular to the gas permeability testing of plastic and metal pipes, which belongs to the testing equipment category.

Background technique

For plastic pipes that store gas for a long time, a gas permeability test is generally required to test whether the pipe fittings are suitable for long-term gas permeation and leakage under a certain pressure. Traditional gas permeability test devices are mostly for membranes, plates and container styles. At present, most of the gas permeability test devices for pipes are air-tight test devices, but there is no test device for gas permeability of pipe fittings. Due to structural and design reasons, the traditional gas permeability test device cannot complete the permeability test of the pipes that need to be tested for gas permeability.

Contents of the invention

In view of the above problems, the purpose of this utility model is to provide a device that can test the gas permeability of pipes under high-pressure gas conditions.

In order to achieve the above object, the technical solution of the utility model is:

A pipe gas permeability test device, the test device includes an upper body connected by bolts and a lower body provided with a connecting head, a cavity is arranged at the center of the lower body, the cavity is cylindrical, and the cavity is The lower part and the side are respectively provided with a first through hole and a second through hole, the first through hole and the second through hole are perpendicular to each other, the first through hole is fixedly connected with the connector on the lower body, and the upper end surface of the lower body is provided with a sealing groove, The sealing groove is located at the periphery of the cavity, the inner diameter of the sealing groove is the same as the outer diameter of the lower end surface of the upper body, and the height of the outer wall of the sealing groove is higher than that of the inner wall. The height of the lower end surface of the upper body is higher than the height difference between the outer wall and the inner wall of the sealing groove.

Due to the adoption of the above technical scheme, the utility model adds a sealing groove in the lower body of the test device, and pours paraffin wax in the additional sealing groove inside the lower body, which strengthens the sealing of the test device. When the test pipe is put into the test device for testing , the tube divides the cavity into a high-pressure chamber and a low-pressure chamber. The test gas can enter the tube through the vent hole at the lower end of the cavity in the lower body to form a high-pressure chamber. The gas that penetrates through the tube enters the cavity, enters the low-pressure chamber, and passes through The vent hole on the side of the cavity enters the external pressure testing device, and the paraffin in the sealing groove can prevent the gas from seeping out from the contact between the upper body and the lower body. The gas permeability test of the pipe sample can be realized by the pressure difference method. The new test device has reasonable design structure, simple structure, low cost and convenient operation, and is suitable for gas permeability test of various pipe materials.

Description of drawings

Figure 1 is a schematic structural view of the utility model;

Figure 2 is a bottom view of the upper body 1 in Figure 1;

Figure 3 is a top view of the lower body 2 in Figure 1;

Figure 4 is a schematic diagram of the working state of the utility model.

Detailed ways

Below in conjunction with the accompanying drawings, a further detailed description will be given to the panel air tightness testing device of the present invention.

As shown in Figure 1, Figure 2, Figure 3, and Figure 4,

A pipe gas permeability test device, the test device is composed of an upper body 1 connected by bolts and a lower body 2 provided with a connecting head, a cavity 6 is arranged at the center of the lower body 2, and the cavity 6 is cylindrical , a first through hole 4 and a second through hole 5 are respectively arranged on the bottom and side of the cavity 6, the first through hole 4 and the second through hole 5 are perpendicular to each other, and the first through hole 4 is fixed to the connector on the lower body 2 Connection, the connecting head is externally connected to the air source, the second through hole 5 is externally connected to the tester, and the upper end surface of the lower body 2 is provided with a sealing groove 3, the sealing groove 3 is located at the periphery of the cavity 6, the inner diameter of the sealing groove 3 and the lower end surface of the upper body 1 The outer diameters are the same as the diameter, and the height of the outer wall of the sealing groove 3 is higher than the height of the inner wall. The height of the lower end surface of the upper body 1 is higher than the height difference between the outer wall and the inner wall of the sealing groove 3 .

Working principle of the utility model:

As shown in Figure 4, during the test, place a certain length of test tubing 8 in the cavity 6 of the lower body 2, set gaskets above and below the test tubing 8, cover the upper body 1, and adjust the upper body 1 and lower body 2, so that the gasket is fully in close contact with the test pipe material 8, the upper body 1 and the lower body 2, and then pour liquid paraffin 7 into the sealing groove 3 in the lower body 2 to make it overflow the lower end surface of the upper body 1 , after it is solidified, connect the high-pressure gas device to be tested through the first through hole 4 below the lower body 2, connect the external measuring device through the second through hole 5 on the side of the lower body 2, and pass in the test gas for measuring the pressure to make it pass into the The pipe 8 of the lower body 2, after the test gas penetrates the test pipe 8 in a sealed state, enters the external pressure measuring device through the second through hole 5, and the gas permeability of the test pipe 8 under pressure can be quantitatively detected by the external test device .

Claims (2)

1. A pipe gas permeability test device, the test device includes an upper body (1) connected by bolts and a lower body (2) provided with a connector, characterized in that: the center of the lower body (2) is set There is a cavity (6), the cavity (6) is cylindrical, and the first through hole (4) and the second through hole (5) are respectively set in the lower part and the side of the cavity (6), and the first through hole ( 4) and the second through hole (5) are perpendicular to each other, the first through hole (4) is fixedly connected with the connector on the lower body (2), and the upper end surface of the lower body (2) is provided with a sealing groove (3), the sealing groove (3) Located on the periphery of the cavity (6), the inner diameter of the sealing groove (3) is the same as the outer diameter of the lower end surface of the upper body (1), and the height of the outer wall of the sealing groove (3) is higher than that of the inner wall. the 2. The device for testing gas permeability of pipes according to claim 1, characterized in that: the height of the lower end surface of the upper body (1) is higher than the height difference between the outer wall and the inner wall of the sealing groove (3).