Liquid ring vacuum pump and liquid ring compressor valve plate check valve

Abstract

The valve plate check valve for liquid ring vacuum pump and liquid ring compressor comprises a valve body, an annular valve plate and a valve plate. The valve body comprises an annular outer shell and a circular bottom plate coaxially arranged inside the outer shell. The outer ring of the bottom plate is sealed with the inner wall of the outer shell. A number of axial columns and a number of axial air-permeable holes are equally divided on two concentric circles, one small and one large, on the inner surface of the bottom plate. The annular valve plate is sleeved on the outer side of the circle surrounded by the columns. When the annular valve plate fits the bottom plate surface outside the column, the air flow can be prevented from flowing through the air-permeable holes. The valve plate is arranged at the end of the column. A large air-permeable hole is arranged in the middle of the valve plate. A number of small air-permeable holes are equidistantly arranged on the circle corresponding to the valve plate on the valve plate. The valve plate is made of a non-metallic material that is light in weight, not easy to deform, corrosion-resistant and softer in texture than the valve body and the valve cover. The check valve has the advantages of low opening and closing energy consumption, sensitive opening and closing response, good sealing effect and no noise.

Description

Technical Field

[0001] The invention relates to a valve plate type check valve for a liquid ring vacuum pump and a liquid ring compressor. The check valve can be used as a gas check valve at the air inlet end of the liquid ring vacuum pump or as a gas check valve at the outlet end of the liquid ring compressor, and belongs to the technical field of check valves for liquid ring vacuum pumps and liquid ring compressors. Background Art

[0002] At present, the check valves for liquid ring vacuum pumps and liquid ring compressors widely used in industry are spring-loaded check valves. The check valve consists of a valve body, an inner stopper arranged inside the valve body, a valve and a hinge, and a hanging ring arranged outside the valve body. The valve and the inner stopper are connected by a hinge. The valve of the check valve consists of two semicircles, and the hinge consists of a chain plate, a rotating shaft and a spring. All parts are made of metal. The following description is based on the gas check valve at the inlet end of the liquid ring vacuum pump. The working principle of the gas check valve at the outlet end of the liquid ring compressor is exactly the same as that of the gas check valve at the inlet end of the liquid ring vacuum pump. When the liquid ring vacuum pump is turned on, the airflow overcomes the elastic force of the spring to open the valve. When the liquid ring vacuum pump stops working, the elastic force of the spring closes the valve. The check valve has the following defects: 1. During operation, the airflow must overcome the elastic force of the spring to open the valve. The airflow consumes power to overcome the elastic force of the spring, resulting in high energy consumption; 2. The spring will fail due to fatigue after long-term operation, resulting in poor sealing during shutdown and a short service life; 3. When opening and closing the valve, a large abnormal sound will occur due to the collision of metal parts, resulting in loud noise. Summary of the invention

[0003] In view of the above-mentioned deficiencies of the existing check valves for liquid ring vacuum pumps and liquid ring compressors, the present invention provides a new valve plate type check valve for liquid ring vacuum pumps and liquid ring compressors. The check valve consists of a valve body, an annular valve plate and a valve cover, and has a flat structure with simple and reliable structure. The annular valve plate is made of a non-metallic material which is light in weight, not easy to deform, corrosion-resistant and softer than a metal valve body and a metal valve cover, and can effectively reduce noise. The structures on both sides of the annular valve plate can not only provide good support for the annular valve plate, but also ensure uniform and smooth flow of gas on both sides of the annular valve plate. The check valve has the advantages of low opening and closing energy consumption, sensitive opening and closing response, good sealing effect, no noise, etc., and has outstanding practicality and innovation.

[0004] To achieve the above purpose, the technical solution of the present invention is:

[0005] The valve disc check valve of liquid ring vacuum pump and liquid ring compressor comprises a valve body, an annular valve disc and a valve plate. The valve body comprises an annular outer shell and a circular bottom plate coaxially arranged inside the outer shell. The outer ring of the bottom plate is sealedly connected to the inner wall of the outer shell. A number of axial columns and a number of axial air holes are equally divided on two concentric circles, one small and one large, on the inner surface of the bottom plate. The annular valve disc is sleeved on the outside of the circle surrounded by the columns. When the annular valve disc fits the surface of the bottom plate outside the column, the air flow can be prevented from flowing through the air holes. The valve plate is arranged at the end of the column. A large air hole is arranged in the middle of the valve plate. A number of small air holes are equidistantly arranged on the circle corresponding to the annular valve disc on the valve plate. The annular valve disc is made of a non-metallic material that is light in weight, not easy to deform, corrosion-resistant and softer than the valve body and valve cover.

[0006] Preferably, a number of support platforms are equally divided at the annular angle between the inner wall of the shell and the inner side wall of the bottom plate, the annular valve plate is placed between the support platform and the column, and a gap is left between the outer edge of the valve plate and the inner wall of the shell.

[0007] Preferably, the valve plate is detachably fixed to the end of the column, and specifically the valve plate is fixed to the end of the column by bolts.

[0008] Preferably, the annular valve plate is made of polytetrafluoroethylene or ultra-high molecular weight polyethylene.

[0009] Preferably, the interior of the annular valve plate is provided with an annular reinforcement plate or an annular reinforcement net made of light alloy.

[0010] Compared with the prior art, the beneficial effects of the present invention are:

[0011] 1. The present invention is composed of a valve body, an annular valve disc and a valve cover. It is a flat structure with a simple and reliable structure. The annular valve disc is made of a non-metallic material that is light in weight, not easy to deform, corrosion-resistant and relatively softer than the metal valve body and the metal valve cover, which can effectively reduce noise. The structures on both sides of the annular valve disc can not only provide good support for the annular valve disc, but also ensure the uniform and smooth flow of gas on both sides of the annular valve disc. The check valve has the advantages of low opening and closing energy consumption, sensitive opening and closing response, good sealing effect, no noise, etc., and has outstanding practicality and innovation.

[0012] 2. In the present invention, a light alloy reinforcement structure is provided inside the annular valve plate, which can further improve the stability of the annular valve plate structure and improve the sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the present invention;

[0014] Figure 2 This Figure 1 A cross-sectional view of

[0015] Figure 3 It is a structural schematic diagram of the valve body in the present invention;

[0016] Figure 4 yes Figure 3 AA section view.

[0017] In the figure: valve body 1, annular valve piece 2, valve plate 3, metal spiral wound gasket 4, lifting screw hole 5, large air hole 6, small air hole 7, bolt 8, air through hole 9, column 10, support platform 11. DETAILED DESCRIPTION

[0018] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0019] Combination Figures 1 to 4 , a valve disc check valve for a liquid ring vacuum pump and a liquid ring compressor comprises a valve body 1, an annular valve disc 2 and a valve plate 3. The valve body 1 comprises an annular outer shell and a circular bottom plate coaxially arranged inside the outer shell. The outer ring of the bottom plate is sealed to the inner wall of the outer shell. A plurality of axial columns 10 and a plurality of axial air holes 9 are equally divided on two concentric circles, one small and one large, on the inner surface of the bottom plate. The annular valve disc 2 is sleeved on the outer side of the circle surrounded by the columns 10. When the annular valve disc 2 fits the bottom plate surface outside the columns 10, the air flow from the air holes 9 can be prevented. The valve plate 3 is arranged at the end of the column 10. A large air hole 6 is arranged in the middle of the valve plate 3. A plurality of small air holes 7 are equidistantly arranged on the circle corresponding to the annular valve disc 2 on the valve plate 3. The annular valve disc 2 is made of a non-metallic material that is light in weight, not easy to deform, corrosion-resistant and has a relatively soft texture relative to the valve body and the valve cover.

[0020] As a preferred technical solution, a number of support platforms 11 are equally divided at the annular angle between the inner wall of the shell and the inner side wall of the bottom plate. At this time, the annular valve plate 2 is placed between the support platform 11 and the column 10, and a gap is left between the outer edge of the valve plate 3 and the inner wall of the shell.

[0021] As a preferred technical solution, the valve plate 3 is detachably fixed to the end of the column 10 . Specifically, the valve plate 3 is fixed to the end of the column 10 by bolts 8 .

[0022] As a preferred technical solution, the annular valve plate 2 is made of polytetrafluoroethylene or ultra-high molecular weight polyethylene.

[0023] As a preferred technical solution, the interior of the annular valve plate 2 is provided with an annular reinforcement plate or an annular reinforcement net made of light alloy.

[0024] Embodiment 1:

[0025] like Figures 1 to 4As shown: a valve plate type check valve for a liquid ring vacuum pump and a liquid ring compressor, including a valve body 1, an annular valve plate 2 and a valve plate 3. The valve body 1 includes an annular outer shell and a circular bottom plate coaxially arranged inside the outer shell. The outer ring of the bottom plate is sealed to the inner wall of the outer shell. A plurality of axial columns 10 and a plurality of axial air-permeable through holes 9 are equally arranged on two concentric circles, one small and one large, on the inner surface of the bottom plate. A plurality of support platforms 11 are equally arranged at the annular angle between the inner wall of the outer shell and the inner wall of the bottom plate. The annular valve disc 2 is arranged between the support platform 11 and the column 10, and a gap is left between the outer edge of the valve plate 3 and the inner wall of the shell. When the annular valve disc 2 is in contact with the bottom plate surface between the column 10 and the support platform 11, the air flow can be prevented from flowing through the air permeable hole 9. The valve disc 3 is arranged at the end of the column 10, and a large air permeable hole 6 is arranged in the middle of the valve disc 3. A number of small air permeable holes 7 are equidistantly arranged on the circle corresponding to the annular valve disc 2 on the valve disc 3. The annular valve disc 2 is made of polytetrafluoroethylene or ultra-high molecular weight polyethylene. The valve disc 3 is fixed to the end of the column 10 by bolts 8.

[0026] The above contents are further detailed descriptions of the present invention in combination with specific implementation methods. It cannot be considered that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, simple replacements made without departing from the concept of the present invention should be deemed to belong to the scope of protection of the present invention.

Claims

1. Liquid ring vacuum pump and liquid ring compressor valve plate check valve, Features: The valve disc type check valve is a flat structure as a whole. The valve disc type check valve comprises a valve body (1), an annular valve disc (2) and a valve plate (3). The valve body (1) comprises an annular outer shell and a circular bottom plate coaxially arranged inside the outer shell. The outer ring of the bottom plate is sealed to the inner wall of the outer shell. A plurality of axial columns (10) and a plurality of axial air holes (9) are equally divided on two concentric circles, one small and one large, on the inner surface of the bottom plate. The annular valve disc (2) is sleeved on the outer side of the circle surrounded by the columns (10). When the annular valve disc (2) is in contact with the bottom plate surface outside the columns (10), air can be prevented from flowing through the air holes (9). The valve plate (3) is arranged at the end of the column (10). The middle part of the valve plate (3) is provided with The valve plate (3) has a large air vent (6), and a plurality of small air vents (7) are equidistantly arranged on a circle corresponding to the annular valve disc (2). The annular valve disc (2) is made of polytetrafluoroethylene or ultra-high molecular weight polyethylene. The interior of the annular valve disc (2) is provided with an annular reinforcement plate or an annular reinforcement net made of a light alloy. The annular valve disc (2) is made of a non-metallic material that is light in weight, not easy to deform, corrosion-resistant, and softer than a metal valve body and a metal valve cover. A plurality of support platforms (11) are evenly arranged at the annular angle between the inner wall of the shell and the inner side wall of the bottom plate. The annular valve disc (2) is arranged between the support platform (11) and the column (10), and a gap is left between the outer edge of the valve plate (3) and the inner wall of the shell.

2. The valve plate check valve for a liquid ring vacuum pump and a liquid ring compressor according to claim 1, Features: The valve plate (3) is detachably fixed to the end of the column (10).

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