Pneumatic angle valve

Abstract

The utility model provides a pneumatic angle valve, and belongs to the technical field of angle valves. The problems that an existing angle valve rod is large in abrasion and high in replacement cost are solved. The pneumatic angle valve comprises an angle valve body with a water inlet and a water outlet, a valve rod and a valve clack arranged on the valve rod, the angle valve body is provided with an assembly opening allowing the valve rod to stretch in for installation, and the position, located at the assembly opening, of the angle valve body is provided with a valve clack which is connected with the angle valve body and used for sealing the assembly opening. The angle valve body is provided with a sealing unit, and the sealing unit is connected with the angle valve body and abuts against the valve clack in a sealing mode. The utility model has the advantage of reducing the abrasion of the valve rod.

Description

Technical Field

[0001] The utility model belongs to the technical field of angle valves and relates to a pneumatic angle valve. Background Art

[0002] Angle valve is an angle stop valve. Angle valve is similar to ball valve, and its structure and characteristics are modified from ball valve. The difference from ball valve is that the outlet and inlet of angle valve are at a right angle of 90 degrees. Existing angle valves are generally controlled by valve stems, but the use of valve stem rotation will inevitably cause wear, which will lead to impurities entering or liquid seeping out, thus affecting its use effect. At the same time, its wear generally needs to be replaced as a whole, resulting in high replacement costs. Summary of the invention

[0003] The purpose of the utility model is to provide a pneumatic angle valve with reduced wear and reduced replacement cost in view of the above problems existing in the prior art.

[0004] The purpose of the utility model can be achieved through the following technical solutions: a pneumatic angle valve, including an angle valve body with a water inlet and a water outlet, a valve stem and a valve disc arranged on the valve stem, and an assembly port for the valve stem to be inserted and installed is opened on the angle valve body, characterized in that the angle valve body is provided with a pneumatic control unit connected to it at the assembly port and used to seal the assembly port and drive the valve stem to move axially through an air pressure difference, and the angle valve body is provided with a sealing unit connected to it and sealed against the valve disc.

[0005] In the above-mentioned pneumatic angle valve, the pneumatic control unit is composed of an assembly shell with an air cavity, a sealing circular plate, a piston plate, a cylinder and a push rod. The assembly shell is connected to the angle valve body through a connecting flange, and a sealing ring is provided at the connection between the assembly shell and the angle valve body to enhance the sealing performance. The sealing circular plate is arranged in the assembly shell, and is slidably connected to the assembly shell, and is connected to the above-mentioned valve stem. The piston plate is also arranged in the assembly shell and is slidably connected to it, and the above-mentioned air cavity is divided into an outer cavity and an inner cavity through the piston plate. The two ends of the push rod are respectively connected to the sealing circular plate and the piston plate. The cylinder is arranged on the assembly shell and connected to it. An air inlet and an air outlet are opened on the outer peripheral wall of the assembly shell located at the outer cavity. A joint part connected to them is provided on the outer peripheral wall of the assembly shell located at the air inlet and the air outlet, and the above-mentioned cylinder is connected to the joint part through a pipeline.

[0006] In the above-mentioned pneumatic angle valve, an assembly port for facilitating the installation of the piston plate and the sealing circular plate is provided on the outer peripheral wall of the assembly shell located at the outer cavity, and a sealing cover connected to the assembly port and used for sealing the assembly port is provided at the assembly port of the assembly shell, and a buffer spring is provided in the assembly shell, with its two ends respectively in contact with the sealing cover and the piston plate.

[0007] In the above-mentioned pneumatic angle valve, the inner diameter A of the assembly shell is larger than the inner diameter B of the angle valve body, and the end face of the sealing circular plate facing the angle valve body is provided with a protrusion that protrudes axially outward and slidably cooperates with the inner wall of the angle valve body, and a sealing ring is sleeved on the protrusion to enhance the sealing performance.

[0008] In the above-mentioned pneumatic angle valve, the sealing unit is a sealing ring connected to the angle valve body, an annular groove is provided on the end face of the sealing ring that contacts the valve disc, and a sealing protrusion is provided on the valve disc that protrudes axially outward and cooperates with the annular groove.

[0009] Compared with the prior art, this pneumatic angle valve has the following advantages:

[0010] 1. The angle valve body is provided with a pneumatic control unit connected to the assembly port and used to seal the assembly port and axially move the valve stem through the air pressure difference. The angle valve body is provided with a sealing unit connected to the angle valve body and sealed against the valve disc. The above structure has the advantages of reducing valve stem wear and increasing service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the cross-sectional structure of the pneumatic angle valve.

[0012] In the figure, 1. Angle valve body; 2. Valve stem; 3. Valve disc; 4. Assembly shell; 5. Sealing circular plate; 6. Piston plate; 7. Cylinder; 8. Push rod; 9. Joint; 10. Sealing cover; 11. Buffer spring; 12. Raised part; 13. Sealing ring. DETAILED DESCRIPTION

[0013] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0014] like Figure 1As shown, the pneumatic angle valve comprises an angle valve body 1 with a water inlet and a water outlet, a valve stem 2 and a valve disc 3 arranged on the valve stem 2, and an assembly port for the valve stem 2 to be inserted and installed is opened on the angle valve body 1, and a pneumatic control unit connected to the angle valve body 1 is arranged at the assembly port and used to seal the assembly port and drive the valve stem 2 to move axially through the air pressure difference, and the angle valve body 1 is provided with a sealing unit connected to the angle valve body 1 and sealed against the valve disc 3, and the sealing unit is located near the water inlet in the angle valve body 1, and the pneumatic control unit is composed of an assembly shell 4 with an air cavity, a sealing circular plate 5, a piston plate 6, a cylinder 7 and a push rod 8, and the above-mentioned cylinder 7 can also be a small air pump, and the assembly shell 4 It is connected to the angle valve body 1 through a connecting flange, and a sealing ring is provided at the connection between the assembly shell 4 and the angle valve body 1 to enhance the sealing performance. The sealing ring can be embedded in the angle valve body 1 or the assembly shell 4, so that the air cavity is connected to the inside of the angle valve. The number of the connecting flanges is two, and they are respectively located on the assembly shell 4 and the angle valve body 1. The sealing circular plate 5 is arranged in the assembly shell 4, and is slidably connected to the assembly shell 4, and is connected to the above-mentioned valve stem 2. The sealing of the connection between the assembly shell 4 and the angle valve body 1 is achieved through the sealing circular plate 5. The piston plate 6 is also arranged in the assembly shell 4 and is slidably connected to it, and the above-mentioned air cavity is divided into an outer cavity and an inner cavity through the piston plate 6. The piston plate 6 is located outside the outer end of the sealing circular plate 5, and a sealing ring is arranged between the piston plate 6 and the assembly shell 4 to enhance the sealing performance. The two ends of the push rod 8 are respectively connected to the sealing circular plate 5 and the piston plate 6, and the push rod 8 is located in the inner cavity. The cylinder 7 is arranged on the assembly shell 4 and connected thereto. An air inlet and an air outlet are provided on the outer peripheral wall of the assembly shell 4 located in the outer cavity. A joint part 9 connected thereto is provided on the outer peripheral wall of the assembly shell 4 located at the air inlet and the air outlet. The cylinder 7 is connected to the joint part 9 through a pipeline. An assembly port for facilitating the installation of the piston plate 6 and the sealing circular plate 5 is provided on the outer peripheral wall of the assembly shell 4 located at the outer cavity. The assembly shell 4 is provided at the assembly port. There is a sealing cover 10 connected to it and used for sealing the assembly port. A buffer spring 11 is arranged in the assembly shell 4, and its two ends are respectively in conflict with the sealing cover 10 and the piston plate 6. Both the sealing cover 10 and the piston plate 6 can be provided with a limiting structure for limiting the position of the buffer spring 11. The limiting structure can be a limiting protrusion or a limiting groove. The sealing unit is a sealing ring 13 connected to the angle valve body 1. An annular groove is provided on the end surface of the sealing ring 13 that conflicts with the valve disc 3. Through the annular groove, the inner wall of the sealing ring 13 is arranged in a multi-step stepped structure. The valve disc 3 is provided with a sealing protrusion that protrudes axially outward and cooperates with the annular groove. Through the sealing protrusion, the outer wall of the valve disc 3 is also arranged in a multi-step stepped structure.

[0015] As a preferred structure, the inner diameter A of the assembly shell 4 is larger than the inner diameter B of the angle valve body 1, so that the sealing circular plate 5 is in contact with the end face of the angle valve body 1 through the push rod 8, and a sealing ring may also be arranged between the sealing circular plate 5, the angle valve body 1 and the assembly shell 4, and a protrusion 12 which protrudes axially outward and slidably cooperates with the inner wall of the angle valve body 1 is arranged on the end face of the sealing circular plate 5 facing the angle valve body 1, and a sealing ring is arranged on the protrusion 12 to enhance the sealing performance.

[0016] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0017] Although this article uses more terms such as angle valve body 1, valve stem 2, valve disc 3, assembly housing 4, sealing disc 5, piston plate 6, cylinder 7, push rod 8, joint part 9, sealing cover 10, buffer spring 11, protrusion 12, sealing ring 13, etc., it does not exclude the possibility of using other terms. These terms are used only to more conveniently describe and explain the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims

1. A pneumatic angle valve, comprising an angle valve body (1) with a water inlet and a water outlet, a valve stem (2) and a valve flap (3) arranged on the valve stem (2), and an assembly opening for the valve stem (2) to be inserted and installed is provided on the angle valve body (1), characterized in that: The angle valve body (1) is provided with a pneumatic control unit connected to the assembly port and used to seal the assembly port and drive the valve stem (2) to move axially through air pressure difference. The angle valve body (1) is provided with a sealing unit connected to the angle valve body and sealed against the valve flap (3).

2. A pneumatic angle valve according to claim 1, characterized in that: The pneumatic control unit is composed of an assembly housing (4) with an air cavity, a sealing disc (5), a piston plate (6), a cylinder (7) and a push rod (8); the assembly housing (4) is connected to the angle valve body (1) via a connecting flange, and a sealing ring for enhancing sealing is provided at the connection between the assembly housing (4) and the angle valve body (1); the sealing disc (5) is arranged in the assembly housing (4), and is slidably connected to the assembly housing (4), and is connected to the valve stem (2); the piston plate (6) is also arranged in the assembly housing (4). The piston plate (6) is slidably connected thereto, and the air cavity is divided into an outer cavity and an inner cavity by the piston plate (6). The two ends of the push rod (8) are respectively connected to the sealing circular plate (5) and the piston plate (6). The cylinder (7) is arranged on the assembly shell (4) and connected thereto. An air inlet hole and an air outlet hole are provided on the outer peripheral wall of the assembly shell (4) located at the outer cavity. A joint part (9) connected thereto is provided on the outer peripheral wall of the assembly shell (4) located at the air inlet hole and the air outlet hole. The cylinder (7) is connected to the joint part (9) via a pipeline.

3. A pneumatic angle valve according to claim 2, characterized in that: The outer peripheral wall of the assembly shell (4) located at the outer cavity is provided with an assembly opening for facilitating the installation of the piston plate (6) and the sealing circular plate (5); the assembly shell (4) is provided with a sealing cover (10) connected to the assembly opening and used for sealing the assembly opening; and the assembly shell (4) is provided with a buffer spring (11) at both ends of which are in contact with the sealing cover (10) and the piston plate (6) respectively.

4. A pneumatic angle valve according to claim 3, characterized in that: The inner diameter A of the assembly shell (4) is larger than the inner diameter B of the angle valve body (1); the sealing disc (5) is provided with a protrusion (12) on the end surface facing the angle valve body (1), which protrudes axially outward and slidably cooperates with the inner wall of the angle valve body (1); and a sealing ring is sleeved on the protrusion (12) to enhance the sealing performance.

5. A pneumatic angle valve according to claim 1, characterized in that: The sealing unit is a sealing ring (13) connected to the angle valve body (1), an annular groove is provided on the end surface of the sealing ring (13) that contacts the valve flap (3), and a sealing protrusion is provided on the valve flap (3) that protrudes axially outward and cooperates with the annular groove.

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