Oil-water one-way valve

Abstract

The utility model discloses an oil-water one-way valve, which relates to the field of valves and comprises a shell main body and an upper plug, a left cavity and a right cavity which are respectively connected with the outside through flanges are arranged inside the shell main body, and counter bores which are respectively communicated with the left cavity and the right cavity are arranged inside the shell main body. An inner pressure cylinder located between the shell body and the upper plug is arranged in the counter bore, a valve seat is arranged at the bottom of the inner pressure cylinder, and a valve ball is arranged on the inner side of the valve seat. The one-way valve can be used for horizontal type and angle type one-way valves, can better improve production requirements, is wider in application range, simple in structure and short in processing and production period, greatly reduces production and processing cost of products, and can further reduce production cost by utilizing existing waste valves for modification. Meanwhile, disassembly and maintenance are facilitated, and the service life is guaranteed.

Description

Technical Field

[0001] The utility model relates to the field of valves, in particular to an oil-water one-way valve. Background Art

[0002] One-way valves are also called check valves or non-return valves. They are used in hydraulic systems to prevent oil from flowing in reverse, or in pneumatic systems to prevent compressed air from flowing in reverse. During oilfield production, when an oil well is shut down for some reason, oil, water, and natural gas will flow back under the pressure difference, causing serious interference to normal production work and high operating costs. One-way valves are set to prevent the backflow of media. Currently, the one-way valves used in oilfields are divided into two types: horizontal and angle.

[0003] The existing oil-water check valves and horizontal check valves have high production costs, short lifespans, and are difficult to maintain. For example, the angle check valve mentioned in the Journal of Jianghan Petroleum University for Workers, Vol. 31, No. 6, January 2018; Article No. 1009-301X (2018) 06-0029-03, adds an inner cylinder to the angle check valve body. The inner cylinder is a hanging basket type, and the hanging basket is divided into: a hanging basket type inner cylinder, a sealing ring, a valve ball, a valve seat, and a baffle, but it can only be used for angle check valves; the product as a whole needs to be specially processed and produced; the processing cost is high; the processing is difficult and the cycle is long. Utility Model Content

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0005] An oil-water one-way valve comprises an outer shell body and an upper plug, wherein the interior of the outer shell body is provided with left and right chambers respectively connected to the outside through flanges, the interior of the outer shell body is provided with countersunk holes respectively connected to the left and right chambers, the interior of the countersunk holes is provided with an internal pressure cylinder located between the outer shell body and the upper plug, the bottom of the internal pressure cylinder is provided with a valve seat, and the inner side of the valve seat is provided with a valve ball.

[0006] A further improvement of the technical solution of the utility model is that a stepped groove is arranged below the countersunk hole, and a sealing member is movably installed inside the stepped groove.

[0007] A further improvement of the technical solution of the utility model is that a thread which cooperates with the upper plug is arranged above the countersunk hole.

[0008] A further improvement of the technical solution of the utility model is that the valve seat is arranged above the sealing member, and the valve seat is located between the sealing member and the inner pressure cylinder for sealing connection.

[0009] A further improvement of the technical solution of the utility model is that the sealing member is a plastic ring or a rubber ring.

[0010] A further improvement of the technical solution of the utility model is that the upper plug is sealed and connected to the shell body.

[0011] Due to the adoption of the above technical solution, the utility model has achieved the following technical progress compared with the prior art:

[0012] The utility model provides an oil-water one-way valve, which realizes one-way sealing through a valve seat and a valve ball in cooperation with a countersunk hole, can be used for horizontal and angle one-way valves, can better improve production needs, and has a wider range of applications.

[0013] The utility model provides an oil-water one-way valve with a simple structure and a short processing production cycle, which greatly reduces the production and processing costs of the product. At the same time, the existing valves (including waste valves with undamaged valve bodies) can be used for waste recycling and transformation, thereby further reducing the production costs.

[0014] The utility model provides an oil-water one-way valve, which is movably installed between a shell body and an upper plug, has a simple structure, is easy to disassemble and repair, and has a guaranteed service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural schematic diagram of the oil-water one-way valve of the utility model;

[0016] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model;

[0017] Figure 3 It is a schematic cross-sectional structure diagram of the valve ball and valve seat of the utility model;

[0018] Figure 4 It is a structural schematic diagram of the shell body of the utility model;

[0019] Figure 5 For this utility model Figure 2 A magnified view of the structure at A.

[0020] In the figure: 1. Shell body; 2. Countersunk hole; 3. Upper plug; 4. Sealing element; 5. Internal pressure cylinder; 6. Valve seat; 7. Valve ball. DETAILED DESCRIPTION

[0021] The utility model is further described in detail below:

[0022] like Figures 1 to 5As shown, the utility model provides an oil-water one-way valve, including a shell body 1 and an upper plug 3, the shell body 1 is provided with left and right chambers respectively connected to the outside through flanges, the shell body 1 is provided with countersunk holes 2 respectively connected to the left and right chambers, the countersunk holes 2 are provided with an internal pressure cylinder 5 located between the shell body 1 and the upper plug 3, the bottom of the internal pressure cylinder 5 is provided with a valve seat 6, and the inner side of the valve seat 6 is provided with a valve ball 7.

[0023] The valve seat 6 and the valve ball 7 can be made of 316 stainless steel or other corrosion-resistant materials to ensure corrosion resistance. The valve seat 6 and the valve ball 7 are pre-tightened before installation to ensure sealing. The valve seat 6 and the valve ball 7 cooperate with the countersunk hole 2 to achieve one-way sealing of the left and right chambers. It can be used for horizontal and angular one-way valves, with a wider range of uses, easy disassembly and maintenance, and guaranteed service life. The shell body 1 and the countersunk hole 2 are processed in one piece to ensure dimensional accuracy. The structure is simple and the processing cycle is short, which greatly reduces the production and processing cost of the product. At the same time, the existing valves (including waste valves with undamaged valve bodies) can be used for waste utilization and transformation to further reduce the production cost.

[0024] like Figure 5 As shown, a stepped groove is provided below the counterbore 2, and a sealing member 4 is movably installed inside the stepped groove.

[0025] The sealing member 4 is arranged in the stepped groove so that the force exerted by the upper plug 3 on the inner pressure cylinder 5 can ensure the sealing between the left and right chambers of the shell body 1 by pressing the sealing member 4 tightly.

[0026] like Figure 2 and Figure 4 As shown, a thread is provided above the countersunk hole 2 to cooperate with the upper plug 3 .

[0027] The upper plug 3 is adapted to the upper plug 3 through the thread, and the upper plug 3 is installed on the top of the shell body 1 through the thread to achieve the compression of the inner pressure cylinder 5. At the same time, it is easy to disassemble and maintain, and the service life is guaranteed.

[0028] like Figure 2 As shown, the valve seat 6 is arranged above the sealing member 4, and the valve seat 6 is located between the sealing member 4 and the inner pressure cylinder 5 for sealing connection.

[0029] The valve seat 6 is arranged above the sealing member 4 and between the sealing member 4 and the inner pressure cylinder 5. The valve seat 6 cooperates with the valve ball 7 to ensure the sealing of the left and right chambers of the outer shell body 1 under the influence of their own weight and pressure, so as to ensure that the liquid and gas in the right chamber do not flow back. A fixed spring can be added between the valve ball 7 and the upper plug 3 according to product requirements to support the valve ball 7 to increase the pressure between the valve ball 7 and the valve seat 6, thereby improving the sealing performance of the valve ball 7 and the valve seat 6.

[0030] like Figure 2 As shown, the sealing member 4 is a plastic ring or a rubber ring.

[0031] The upper plug 3 is sealed and connected to the housing body 1 .

[0032] The sealing member 4 is a plastic ring or a rubber ring, which is arranged between the valve seat 6 and the shell body 1. The inner pressure cylinder 5 and the upper plug 3 are pressed from above to ensure the plane sealing, thereby improving the flexibility and facilitating maintenance.

[0033] The working principle of the oil-water check valve is described in detail below.

[0034] like Figures 1 to 5 As shown, during use, when the pressure in the left chamber of the housing body 1 is greater than that in the right chamber, the liquid or gas flowing in the housing body 1 is as follows Figure 2 The valve ball 7 located on the inner side of the valve seat 6 moves in the direction of the middle arrow to open, and the valve ball 7 is pushed up along the inner pressure cylinder 5, so that the medium flows into the shell body 1 and enters the right chamber to realize circulation. When the pressure in the right chamber is greater than that in the left chamber, the valve ball 7 moves downward to contact the valve seat 6 under the dual action of its own weight and the medium pressure. The left and right chambers of the shell body 1 are closed by the contact between the valve ball 7 and the valve seat 6, so that the liquid or gas in the right chamber does not flow back.

[0035] The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to the present invention. Therefore, modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. An oil-water non-return valve, comprising a housing body (1) and an upper plug (3), wherein the housing body (1) is provided with left and right chambers respectively connected to the outside through flanges, and characterized in that: The shell body (1) is provided with a countersunk hole (2) in communication with the left and right chambers respectively. The countersunk hole (2) is provided with an internal pressure cylinder (5) located between the shell body (1) and the upper plug (3). The bottom of the internal pressure cylinder (5) is provided with a valve seat (6). The inner side of the valve seat (6) is provided with a valve ball (7).

2. The oil-water one-way valve according to claim 1, characterized in that: A stepped groove is provided below the counterbore (2), and a sealing member (4) is movably mounted inside the stepped groove.

3. The oil-water one-way valve according to claim 1, characterized in that: A thread is provided above the countersunk hole (2) and is matched and connected with the upper plug (3).

4. The oil-water one-way valve according to claim 2, characterized in that: The valve seat (6) is arranged above the sealing member (4), and the valve seat (6) is located between the sealing member (4) and the inner pressure cylinder (5) for sealing connection.

5. The oil-water one-way valve according to claim 2, characterized in that: The sealing member (4) is a plastic ring or a rubber ring.

6. The oil-water one-way valve according to claim 3, characterized in that: The upper plug (3) is sealedly connected to the housing body (1).

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