CN104316453A - Test fixture for testing resistance to high-temperature, high-pressure and high-corrosive medium of rubber sealing ring - Google Patents

Abstract

The invention relates to a rubber sealing ring anti-high temperature, high pressure and high corrosive medium test fixture, which includes a container base (1), a cover plate (2), a pressure plate (3) and a sealing ring to be tested (4), and the upper part of the inner wall is provided with The annular step (11), the container base (1) is filled with an indicator (8), the side wall of the cover plate (2) is provided with an annular sealing ring groove (10), and the upper edge of the lower surface of the cover plate (2) is A plurality of connecting grooves (6) are evenly arranged in the circumferential direction, and a vent hole (5) is opened in the center of the cover plate (2). The sealing ring (4) to be tested is installed in the sealing ring groove (10), and the The cover plate (2) is pressed into the container base (1), the lower surface of the cover plate (2) is in close contact with the annular step (11), the sealing ring to be tested (4) is in close contact with the inner wall of the container base (1), and the pressure plate (3) Fix it on the top of the cover plate (2) by screws. The invention has the advantages of convenient assembly and disassembly, accurate testing and easy operation.

Description

A rubber sealing ring resistance to high temperature, high pressure and high corrosive medium test fixture

technical field

The invention relates to a jig for testing the performance of a sealing ring, in particular to a jig for testing a rubber sealing ring resistant to high temperature, high pressure and high corrosive medium.

Background technique

Rubber sealing products are widely used in oil and gas production, such as riser O-rings, packer rubber cartridges, blowout preventer rubber cores, etc. Among them, the rubber O-ring is a relatively common seal. It has the advantages of simple structure, convenient installation, and wide application range. It is used in structures that need to prevent leakage or penetration. Under oil and gas production wells, rubber sealing rings are usually in high-temperature, high-pressure, high-corrosion medium environments. These harsh environmental factors are the main reasons for the aging and deformation of rubber sealing rings. It can be seen that the working environment has a great impact on the sealing performance of rubber. The sealing performance of rubber sealing materials is directly related to the production safety of oil fields, so it is very necessary to study and analyze the environmental factors that affect the failure of rubber sealing rings. By simulating the working environment of downhole rubber sealing materials, relevant data can be obtained effectively and intuitively. This requires the design of a rubber test fixture to complete the sealing performance test of different rubber sealing materials in high temperature, high pressure and high corrosive media. The sealing ring is often an important part of a piece of equipment. As an isolation device, it usually isolates an important component and protects the component from external influences, so that the entire equipment can work normally.

Contents of the invention

The object of the present invention is to overcome the shortcomings of the prior art, and provide a test fixture for sealing rings resistant to high temperature, high pressure and high corrosive medium, which is easy to disassemble, accurate in test and easy to operate.

The purpose of the present invention is achieved through the following technical solutions: a rubber seal ring resistant to high temperature, high pressure and high corrosive medium test fixture, which includes a container base, a cover plate, a pressure plate and a sealing ring to be tested, the container base is a barrel-shaped structure, and the inner wall The upper part is provided with an annular step, the base of the container is filled with an indicator, the cover plate is in the shape of a round cake, the side wall of the cover plate is provided with an annular sealing ring groove, and the lower surface of the cover plate is uniformly arranged with a plurality of There is a vent hole in the center of the cover plate, the sealing ring to be tested is installed in the sealing ring groove, and the cover plate is pressed into the container base, the lower surface of the cover plate is in close contact with the annular step, and the sealing ring to be tested In close contact with the inner wall of the container base, the pressure plate is fixed on the top of the cover plate by screws.

The upper surface of the cover plate is provided with an annular groove concentric with it, and the annular groove is filled with a metal C-shaped ring. One end of the metal C-shaped ring is pressed against the bottom of the annular groove, and the other end is pressed against the lower surface of the pressure plate. .

The transverse width of the communication groove is greater than the width of the annular step.

The liquid level of the indicator is lower than the plane where the annular step is located.

The present invention has the following advantages:

1. When installing the cover plate, the vent hole solves the problem that the cover plate is difficult to press in and remove. When disassembling, the pressure inside and outside the container base is balanced, and the required force is small, which is convenient for disassembling.

2. The air hole can facilitate the test without removing the rubber O-ring and at the same time use the pH meter to detect the pH value of the display agent in time, which is beneficial to the test and detection; the metal C-ring is used, and its sealing level is higher than that of the rubber sealing ring, which can prevent The corrosive medium enters the container through the air hole to interfere with the test results and improve the accuracy of the test.

3. After the indicator is installed in the container base, press the cover plate equipped with the sealing ring to be tested into the container, install the metal C-shaped ring, and install the pressure plate. During the test, the test fixture is inverted, and the indicator and the leak are connected through the connecting groove. The gas is fully reacted, and the whole operation process is simple, convenient and easy to realize.

Description of drawings

Fig. 1 is the sectional structure schematic diagram of the present invention;

Fig. 2 is the cross-sectional structure schematic diagram of cover plate;

Figure 3 is a schematic diagram of the top view structure of the cover plate;

In the figure: 1-container base, 2-cover plate, 3-pressure plate, 4-seal ring to be tested, 5-ventilation hole, 6-communication groove, 7-metal C-ring, 8-indicator, 9-ring groove , 10-ring groove, 11-ring step. the

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following description.

As shown in Figure 1, a rubber sealing ring resistance to high temperature, high pressure and high corrosive medium test fixture, it includes a container base 1, a cover plate 2, a pressure plate 3 and a sealing ring 4 to be tested, the container base 1 is in a barrel-shaped structure, and the inner wall The upper part is provided with an annular step 11, the container base 1 is filled with an indicator 8, the cover plate 2 is in the shape of a round cake, and an annular sealing ring groove 10 is opened on the side wall of the cover plate 2, as shown in Figure 3, the cover plate 2 A plurality of communication grooves 6 are evenly arranged on the lower surface of the lower surface along its circumference, and a vent hole 5 is opened in the center of the cover plate 2. The seal ring 4 to be tested is installed in the seal ring groove 10, and the cover plate 2 is pressed into the In the container base 1, the lower surface of the cover plate 2 is in close contact with the annular step 11, the sealing ring 4 to be tested is in close contact with the inner wall of the container base 1, and the pressure plate 3 is fixed on the top of the cover plate 2 by screws.

Further, as shown in Figure 2, the upper surface of the cover plate 2 is provided with an annular groove 9 concentric with it, and the annular groove 9 is filled with a metal C-shaped ring 7, and one end of the metal C-shaped ring 7 is pressed against the ring The bottom of groove 9, the other end presses on the lower surface of pressing plate 3.

Further, the transverse width of the communication groove 6 is greater than the width of the annular step 11 .

Further, the liquid level of the indicator 8 is lower than the plane where the annular step 11 is located.

The working process of the present invention is as follows: the indicator 8 is installed in the container base 1, the sealing ring 4 to be tested is embedded in the sealing ring groove 10 of the cover plate 2, and then pressed into the container base 1, and the metal C-shaped ring 7 is placed on the cover plate 2 In the seal ring groove 10, the pressure plate 3 is connected with the cover plate 2 by screws, the vent hole 5 is conducive to the smooth pressing of the cover plate 2 into the container base 1, and the communication groove 6 is convenient for the infiltrated substance to be in contact with the indicator 8, and it is inverted during the test The test fixture allows the indicator 8 to fully react, and observe the sealing condition of the sealing ring 4 to be tested. the

Claims (4)

1. A rubber sealing ring resistance to high temperature, high pressure and high corrosive medium test fixture, characterized in that it includes a container base (1), a cover plate (2), a pressure plate (3) and a sealing ring to be tested (4), the container base (1) It has a barrel-shaped structure, and an annular step (11) is provided on the upper part of the inner wall. The container base (1) is filled with an indicator (8), and the cover (2) is in the shape of a round cake. The side of the cover (2) There is an annular sealing ring groove (10) on the wall, and a plurality of communication grooves (6) are evenly arranged on the lower surface of the cover plate (2) along its circumference, and a vent hole is opened in the center of the cover plate (2) (5), the sealing ring to be tested (4) is installed in the sealing ring groove (10), and the cover plate (2) is pressed into the container base (1), the lower surface of the cover plate (2) is in contact with the annular step (11 ), the sealing ring to be tested (4) is in close contact with the inner wall of the container base (1), and the pressure plate (3) is fixed above the cover plate (2) by screws. 2. A rubber sealing ring resistance to high temperature, high pressure and high corrosive medium test fixture according to claim 1, characterized in that: the upper surface of the cover plate (2) is provided with an annular groove (9) concentric with it, The annular groove (9) is filled with a metal C-ring (7), one end of the metal C-ring (7) is pressed against the bottom of the annular groove (9), and the other end is pressed against the lower surface of the pressure plate (3). 3. A rubber sealing ring resistance to high temperature, high pressure and high corrosive medium test fixture according to claim 1, characterized in that: the transverse width of the communication groove (6) is larger than the width of the annular step (11). 4. A rubber sealing ring resistance to high temperature, high pressure and high corrosive medium test fixture according to claim 1, characterized in that: the liquid level of the indicator (8) is lower than the plane where the annular step (11) is located.