Erosion-resistant lifting check valve

Abstract

The utility model discloses an erosion-resistant lift check valve, which belongs to the technical field of check valves, and comprises a valve body, a valve cover, a valve seat, a valve seat gland, a valve clack and the like, the sealing surface of the valve clack and the valve seat is arranged to be a 40-degree cone, fluid can be adjusted along with different axial positions of an inner cone and an outer cone after being eroded, the abrasion of parts can be compensated, and the service life of the parts is prolonged. Gravels in fluid are not easy to remain on the conical sealing surface, so that the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of check valves, in particular to an erosion-resistant lifting check valve. Background Art

[0002] Check valves, also known as non-return valves and one-way valves, are used in pipeline systems. They are automatically opened and closed by the force generated by the flow of the medium in the pipeline. They are an automatic valve used to prevent the medium from flowing back in the pipeline. According to different structural designs, they can be divided into lift check valves, swing check valves and butterfly check valves. When the medium flows in the specified direction, the valve disc is opened by the force of the medium. When the medium flows back, the valve disc is closed due to the deadweight of the valve disc and the reverse force of the medium on the valve disc, thereby preventing the medium from flowing back. The sealing surface between the valve disc and the valve seat of the currently used lift check valve is a plane. During operation, as the use time increases, the sealing surface is severely eroded by the fluid, and the plane is easily mixed with sand and gravel in the fluid, resulting in reduced sealing performance and a short service life. Summary of the invention

[0003] The utility model aims to provide an erosion-resistant lifting check valve, which does not reduce the sealing performance after fluid erosion, and the sealing surface is not easily mixed with sand and gravel in the fluid, thereby increasing the service life.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solution: an erosion-resistant lifting check valve, comprising a valve seat (4) arranged in a valve body (1), a valve seat sealing ring (2) and an O-ring (3) arranged between the valve seat (4) and the valve body (1), a valve flap (5) arranged at the upper end of the valve seat (4), a valve cover (9) arranged at the upper end of the valve body (1), a spring (6) arranged between the valve flap (5) and the valve cover (9), a steel ring (8) arranged between the valve body (1) and the valve cover (9), a nut (10) and a bolt (11) arranged above the valve cover (9), a valve seat pressure cover (7) arranged between the valve body (1), a positioning pin (13) arranged between the valve seat pressure cover (7) and the valve body (1), and a stop ring (12) arranged between the valve seat pressure cover (7) and the valve cover (9).

[0005] Preferably, the valve body (1) and the valve cover (9) are connected by bolts (11) and nuts (10).

[0006] Preferably, the valve seat (4), valve flap (5), spring (6), valve seat gland (7), steel ring (8), and valve cover (9) are arranged concentrically with respect to the vertical center of the valve body (1).

[0007] Preferably, the sealing surface between the valve flap (5) and the valve seat (4) is a 40° cone.

[0008] The beneficial effects of the utility model are as follows: the utility model provides an erosion-resistant lifting check valve, in which the valve disc and the valve seat sealing surface adopt a 40° conical design, which can be adjusted according to the different axial relative positions of the inner and outer cones after fluid erosion, and can compensate for the erosion suffered by the parts, and the conical sealing surface is not easy to retain sand and gravel in the fluid, thereby extending the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the structure of the utility model;

[0010] In the figure: 1. Valve body 2. Valve seat sealing ring 3. O-ring 4. Valve seat 5. Valve disc 6. Spring 7. Valve seat gland 8. Steel ring 9. Valve cover 10. Nut 11. Bolt 12. Stop ring 13. Positioning pin DETAILED DESCRIPTION

[0011] The technical solution of the utility model is further explained below in conjunction with the accompanying drawings.

[0012] like Figure 1 As shown, the erosion-resistant lifting check valve comprises a valve seat (4) arranged in a valve body (1), a valve seat sealing ring (2) and an O-ring (3) arranged between the valve seat (4) and the valve body (1), a valve flap (5) arranged at the upper end of the valve seat (4), a valve cover (9) arranged at the upper end of the valve body (1), a spring (6) arranged between the valve flap (5) and the valve cover (9), a steel ring (8) arranged between the valve body (1) and the valve cover (9), a nut (10) and a bolt (11) arranged above the valve cover (9), a valve seat pressure cover (7) arranged between the valve body (1), a positioning pin (13) arranged between the valve seat pressure cover (7) and the valve body (1), and a stop ring (12) arranged between the valve seat pressure cover (7) and the valve cover (9).

[0013] Preferably, the valve body (1) and the valve cover (9) are connected by bolts (11) and nuts (10).

[0014] Preferably, the valve seat (4), valve flap (5), spring (6), valve seat gland (7), steel ring (8), and valve cover (9) are arranged concentrically with respect to the vertical center of the valve body (1).

[0015] Preferably, the sealing surface between the valve flap (5) and the valve seat (4) is a 40° cone.

[0016] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An erosion-resistant lift check valve, characterized in that: The invention comprises a valve seat (4) arranged inside a valve body (1), a valve seat sealing ring (2) and an O-ring (3) arranged between the valve seat (4) and the valve body (1), a valve flap (5) arranged at the upper end of the valve seat (4), a valve cover (9) arranged at the upper end of the valve body (1), a spring (6) arranged between the valve flap (5) and the valve cover (9), a steel ring (8) arranged between the valve body (1) and the valve cover (9), a nut (10) and a bolt (11) arranged above the valve cover (9), a valve seat pressure cover (7) arranged between the valve body (1), a positioning pin (13) arranged between the valve seat pressure cover (7) and the valve body (1), and a stop ring (12) arranged between the valve seat pressure cover (7) and the valve cover (9).

2. The erosion-resistant lift check valve according to claim 1, characterized in that: The valve body (1) and the valve cover (9) are connected via bolts (11) and nuts (10).

3. The erosion-resistant lift check valve according to claim 1, characterized in that: The valve seat (4), valve flap (5), spring (6), valve seat gland (7), steel ring (8), and valve cover (9) are arranged concentrically with respect to the vertical center of the valve body (1).

4. The erosion-resistant lift check valve according to claim 1, characterized in that: The sealing surface between the valve flap (5) and the valve seat (4) is in a 40° cone shape.

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