Spherical sewage check valve

Abstract

The present invention relates to a spherical sewage check valve, which comprises a valve body and a filter. The valve body has an inlet passage and an outlet passage. The inlet passage is connected to the pump outlet passage through a flange, and the outlet passage is fixedly and sealingly installed at the bottom of the water storage tank through a flange. The feature is that a discharge device and a check device are provided at the upper end of the valve body outlet passage, which have the dual functions of a check valve and a sewage valve, reducing the number of valve installations and the equipment installation cost. During sewage discharge, the accumulated substances between the check valve outlet and the filter screen are removed simultaneously, preventing impurities from accumulating at the check valve sealing pair and improving the sealing reliability. It is applicable to the water supply and drainage devices of water plants, water towers, swimming pools and other water pools.

Description

Technical Field

[0001] The present invention belongs to the field of valves, and in particular relates to a water supply and drainage control valve, which is applicable to water supply and drainage devices of water plants, water towers, swimming pools and other water pools. Background Art

[0002] In water supply systems such as water plant water tanks, large water tanks, swimming pools, etc., water is generally supplied to the water tank by a water pump. A check valve is installed between the water pump outlet and the water tank to prevent the water in the water tank from flowing back when the water pump stops. A drain valve is also required to be installed at the bottom of the water tank to facilitate cleaning the water tank and discharging the dirt in the water tank, keep the water quality of the water tank clean and sanitary, and ensure water supply safety. Its main disadvantages are that two valves, a check valve and a drain valve, need to be installed at the bottom of the water tank, which increases the installation cost of the equipment; in addition, in order to prevent impurities from entering the water tank, a filter cage is generally required at the outlet of the check valve. During use, impurities will gradually accumulate between the check valve outlet and the filter cage, causing impurities to enter the sealing surface of the check valve seat, affecting the sealing performance of the check valve, and causing the check valve to be loosely closed and leaking. Summary of the invention

[0003] In view of the shortcomings of the prior art, the present invention provides a ball-type sewage check valve which has the dual functions of a check valve and a sewage valve, has low equipment installation cost and reliable sealing performance.

[0004] The technical solution of the present invention comprises a valve body and a filter. The valve body has an inlet channel and an outlet channel. The inlet channel is connected to the pump outlet channel through a flange. The outlet channel is fixedly sealed and installed at the bottom of the water storage tank through a flange. The filter is installed on the upper end face of the flange of the valve body outlet channel. The inlet channel and the outlet channel are perpendicular to each other. The invention is characterized in that a discharge device and a check device are provided at the upper end of the valve body outlet channel. The discharge device is composed of a discharge valve seat and a discharge valve plate. The discharge valve seat is installed in the upper end face of the valve body outlet channel. The discharge valve plate is installed on the upper end face of the outer cage frame through an inner cage frame and a valve stem. The upper end face of the discharge valve plate and the lower end of the inner cage frame are connected. The check device is composed of a check valve seat and a ball. The check valve seat is arranged on the inner wall of the center hole of the discharge valve plate, and its sealing surface has a spherical sealing surface that cooperates with the ball. The discharge channel is connected to the discharge channel directly below the outlet channel of the valve body. The discharge channel is located on the lower side of the inlet channel, and a discharge valve is installed at its outlet end. Filters are arranged on the side walls of the outer and inner cage frames, respectively.

[0005] In the above technical solution, a valve stem nut is arranged between the valve stem and the outer wire cage. The valve stem nut is rotatably installed on the outer wire cage, and its outer cylindrical surface is fixedly connected to the driving handwheel. The internal thread is in driving cooperation with the external thread of the valve stem. A guiding device is arranged between the valve stem and the outer wire cage.

[0006] In the above technical solution, the outer wire cage and the inner wire cage adopt a cylindrical structure. The discharge valve seat is composed of a rubber sealing seat arranged on the upper plane of the circular boss, and an annular groove is formed between the outer cylindrical surface of the circular boss and the outer wire cage.

[0007] In the above technical solution, the sphere adopts a stainless steel hollow sphere.

[0008] In the above technical solution, the outlet end of the discharge channel adopts a reduced-diameter structure.

[0009] The beneficial effects of the present invention compared with the prior art are as follows: A discharge device and a check valve device are provided at the upper end of the valve body outlet channel, which has the dual functions of a check valve and a drain valve, reducing the number of valve installations and the equipment installation cost. When draining, the accumulation between the outlet of the check valve and the filter screen is removed at the same time, preventing impurities from accumulating at the sealing pair of the check valve and improving the sealing reliability. Description of the Drawings

[0010] Figure 1 is a schematic structural diagram of the present invention.

[0011] In the figure: 1 valve body, 2 discharge channel, 3 inlet channel, 4 outlet channel, 5 rubber sealing seat, 6 discharge valve plate, 7 check valve seat, 8 sphere, 9 inner wire cage, 10 outer wire cage, 11 valve stem, 12 circular boss, 13 annular groove. Detailed Embodiments

[0012] Such as Figure 1The spherical sewage check valve shown in the figure includes a valve body 1 and a filter. The valve body 1 has an inlet passage 3 and an outlet passage 4. Its inlet passage 3 is connected to the pump outlet passage by a flange. The outlet passage 4 is fixedly and sealedly installed at the bottom of the water storage tank through a flange. The water storage tank includes a tap water reservoir of a water plant, a swimming pool, a domestic water storage tank, etc. The filter is installed on the upper end face of the flange of the outlet passage 4 of the valve body 1. The inlet passage 3 and the outlet passage 4 are perpendicular to each other. The center line of the inlet passage 3 is in the horizontal direction, and the center line of the outlet passage 4 is in the vertical direction. It is characterized in that: a discharge device and a check device are provided at the upper end of the outlet passage 4 of the valve body 1; the discharge device is composed of a discharge valve seat and a discharge valve plate 6. The discharge valve seat is installed inside the upper end face of the outlet passage 4 of the valve body 1. The discharge valve plate 6 is installed on the upper end face of the outer wire cage 10 through the inner wire cage 9 and the valve rod 11. The upper end face of the discharge valve plate 6 is fixedly connected to the lower end of the inner wire cage 9, and the lower end face cooperates with the discharge valve seat to form a discharge seal pair. The upper end face of the inner wire cage 9 is fixedly connected to the lower end of the valve rod 11. The valve rod 11 passes through the upper end face of the outer wire cage 10 in a dynamic seal manner and is connected to the transmission handwheel. The lower end of the outer wire cage 10 is fixedly installed outside the discharge valve seat on the upper end face of the outlet passage 4 of the valve body 1; the check device is composed of a check valve seat 7 and a sphere 8. The check valve seat 7 is arranged on the inner wall of the central hole of the discharge valve plate 6, and its sealing surface has a spherical sealing surface that cooperates with the sphere 8. The sphere 8 is placed in the cavity formed by the discharge valve plate 6 and the inner wire cage 9; a discharge passage 2 is communicated directly below the outlet passage 4 of the valve body 1. The discharge passage 2 is located below the inlet passage 3, and a discharge valve is installed at its outlet end; filter meshes are respectively arranged on the side walls of the outer wire cage 10 and the inner wire cage 9. When the water pump is working, the water pressure in the inlet passage 3 pushes the sphere 8 to rise through the outlet passage 4, and the check valve opens to supply water to the water storage tank; when the water pump stops working, the sphere 8 drops by gravity and seals with the check valve seat 7 to prevent the water in the water storage tank from flowing back; when the water storage tank is drained of sewage, the inner wire cage 9 and the discharge valve plate 6 are lifted through the valve rod 11, the discharge valve is opened, and the dirt in the water storage tank is discharged from between the discharge valve plate 6 and the discharge valve seat to the discharge passage 2 and the discharge valve.

[0013] The technical effect produced by this technical solution is that it integrates a check valve and a discharge valve. Only one valve body needs to be installed to achieve the functions of the check valve and the discharge valve, reducing the number of valves installed in the water storage tank and the equipment installation cost. During sewage discharge, the accumulation between the outlet of the check valve and the filter mesh is removed at the same time, preventing impurities from accumulating at the check valve seal pair and improving the sealing reliability.

[0014] A valve stem nut is arranged between the valve stem 11 and the outer network cage 10. The valve stem nut is rotatably installed at the center position of the upper end face of the outer network cage 10. The upper outer cylindrical surface thereof is fixedly connected to the driving handwheel, and the internal thread is in transmission cooperation with the external thread of the valve stem 11. A guiding device is arranged between the valve stem 11 and the outer network cage 10. The driving handwheel can be provided with a driving rod. The driving rod extends into the bottom of the water storage tank and is inserted into the upper end of the valve stem nut to drive the valve stem nut to rotate, thereby driving the valve stem 11 to move up and down. The length of the driving rod is designed according to the depth of the water storage tank.

[0015] The technical effect of this technical structure is that the rotational motion of the driving handwheel can be converted into the up-and-down movement of the valve stem 11, and the inner network cage 9 and the discharge valve plate 6 are driven to move up and down, so that when the discharge valve plate 6 rises, it opens the sewage discharge with the discharge valve seat, and when it descends, it presses against the discharge valve seat to close tightly for sealing.

[0016] The discharge valve seat is composed of a rubber sealing seat 5 arranged on the upper plane of the circular boss 12, and an annular groove 13 is formed between the outer cylindrical surface of the circular boss 12 and the outer network cage 10. The outer network cage 10 and the inner network cage 9 adopt a cylindrical structure, or a square structure can also be adopted.

[0017] The technical effect of this technical structure is to store the dirt blocked by the outer network cage 10 after passing through the inner network cage 9 in the annular groove 13, so as to prevent the dirt from accumulating on the rubber sealing seat 5 and affecting the sealing performance.

[0018] The sphere 8 adopts a stainless steel hollow sphere. The wall thickness of the stainless steel hollow sphere is designed according to the inlet water pressure to ensure that the inlet water pressure can reliably push the sphere 8 to rise.

[0019] The outlet end of the discharge channel 2 adopts a reduced-diameter structure. The technical effect of this technical structure is to reduce the diameter of the discharge valve at its outlet end, and even the diameter of the discharge valve can be reduced to a very small value, reducing the product cost.

Claims

1. A spherical sewage check valve, comprising a valve body (1) and a filter. The valve body (1) has an inlet passage (3) and an outlet passage (4). The inlet passage (3) is flange-connected to the pump outlet, and the outlet passage (4) is fixedly and sealedly installed at the bottom of the water storage tank through a flange. The filter is installed on the upper end face of the flange of the outlet passage (4) of the valve body (1), and the inlet passage (3) and the outlet passage (4) are perpendicular to each other. It is characterized in that: At the upper end of the outlet passage (4) of the valve body (1), a discharge device and a check device are provided; the discharge device consists of a discharge valve seat and a discharge valve plate (6). The discharge valve seat is installed in the upper end face of the outlet passage (4) of the valve body (1). The discharge valve plate (6) is installed on the upper end face of the outer wire cage frame (10) through the inner wire cage frame (9) and the valve stem (11). The upper end face of the discharge valve plate (6) is fixedly connected to the lower end of the inner wire cage frame (9), and the lower end face cooperates with the discharge valve seat to form a discharge seal pair. The upper end face of the inner wire cage frame (9) is fixedly connected to the lower end of the valve stem (11). The valve stem (11) passes through the upper end face of the outer wire cage frame (10) with dynamic sealing and is connected to the driving handwheel. The lower end of the outer wire cage frame (10) is fixedly installed on the outside of the discharge valve seat on the upper end face of the outlet passage (4) of the valve body (1); the check device consists of a check valve seat (7) and a sphere (8). The check valve seat (7) is arranged on the inner wall of the central hole of the discharge valve plate (6), and its sealing surface has a spherical sealing surface that cooperates with the sphere (8). The sphere (8) is placed in the cavity formed by the discharge valve plate (6) and the inner wire cage frame (9); the discharge passage (2) is connected to the lower side directly below the outlet passage (4) of the valve body (1). The discharge passage (2) is located below the inlet passage (3), and a discharge valve is installed at its outlet end; filter meshes are respectively arranged on the side walls of the outer wire cage frame (10) and the inner wire cage frame (9); the sphere (8) is made of a stainless steel hollow sphere, and the outlet end of the discharge passage (2) adopts a reduced-diameter structure.

2. The spherical sewage check valve according to claim 1, characterized in that: A valve stem nut is arranged between the valve stem (11) and the outer wire cage frame (10). The valve stem nut is rotatably installed at the central position of the upper end face of the outer wire cage frame (10). Its upper outer cylindrical surface is fixedly connected to the driving handwheel, and its internal thread is in driving cooperation with the external thread of the valve stem (11). A guiding device is arranged between the valve stem (11) and the outer wire cage frame (10).

3. The spherical sewage check valve according to claim 1, characterized in that: the discharge The valve seat is composed of a rubber seal seat (5) arranged on the upper plane of the circular boss (12). There is an annular groove (13) between the outer cylindrical surface of the circular boss (12) and the outer wire cage frame (10).

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