CN112145741A

CN112145741A - Back flush valve

Info

Publication number: CN112145741A
Application number: CN202011134533.0A
Authority: CN
Inventors: 张晓洋; 张彦斌; 贺少旭; 徐中海
Original assignee: Henan University of Science and Technology
Current assignee: Henan University of Science and Technology
Priority date: 2020-10-21
Filing date: 2020-10-21
Publication date: 2020-12-29

Abstract

The utility model provides a reverse flushing valve, which comprises an upper valve body, lower valve body, the diaphragm, connecting rod and the valve gap of setting in last valve body top, be equipped with the clamp plate in going up the valve body, upward be provided with a water inlet and a plurality of outlet on the valve body, water inlet and outlet are evenly laid in last valve body periphery, set up on the lower valve body and wash the mouth, the connecting rod runs through valve body and diaphragm, the diaphragm sets up in the upper end of connecting rod and between valve gap and last valve body, connecting rod and diaphragm are connected through the sealed chuck that sets up in the valve gap, the lower extreme of connecting rod is equipped with the valve plug, the valve plug will go up the valve body and separate into intake antrum and drainage chamber, be equipped with the spring between clamp plate and the sealed chuck, and along with the hydraulic control valve port control pressure. The invention has simple structure and high reliability, can ensure long-time stable operation without maintenance, has lower manufacturing cost and further reduces the cost of modern agriculture and industrial production.

Description

Back flush valve

Technical Field

The invention relates to the field of water filtration in modern agricultural drip irrigation technology and circulating water filtration treatment in industrial production, in particular to a back flushing valve.

Background

The back flush valve is widely applied to filtration of water in modern agriculture and filtration treatment of circulating water in industrial production. The hydraulic control valve special for the full-automatic backwashing filter system is driven by the pressure of a pipeline system and can automatically switch, so that the automatic backwashing of the filter is realized. The device has high reliability, can ensure long-time stable operation under the condition of no maintenance, can stably change the flow direction of water, closes the water inlet when the back flushing port is opened, and vice versa, and avoids overflow of the filter or mixing of clear water and waste water.

In the prior art, a backwash valve is applied to an automatic backwash filter system having at least two parallel filter units, that is, clean water filtered by one filter unit is used as wash water of the other filter unit in a backwash process. When a hydraulic signal sent by the controller is received, the flow direction of water flow in the backwashing valve is changed: the water inlet is closed, the water outlet is opened, clean water filtered by other filtering units enters the unit for flushing, and the flushing water is discharged through the water outlet. The back flushing valve body of the technology has larger volume and more complex structure, and because the back flushing valve is often used in larger amount and has higher manufacturing cost in actual production, the economic burden of domestic agricultural irrigation and industrial production users is increased, and the back flushing valve is not suitable for saving water resources in industrial and agricultural production in China.

Disclosure of Invention

Aiming at the existing defects of the prior art, the invention provides the back flushing valve which is simple in structure and low in manufacturing cost, and adopts a two-position three-way structure, so that the cost of modern agriculture and industrial production is reduced, the modern agriculture technology is further popularized, and the water circulation utilization rate of industrial production is improved.

The invention is realized by the following technical scheme: a reverse flushing valve comprises an upper valve body, a lower valve body, a diaphragm, a connecting rod and a valve cover arranged above the upper valve body, wherein a pressing plate is arranged in the upper valve body, the upper valve body is provided with a water inlet and a plurality of water outlets, the water inlet and the water outlets are uniformly distributed on the periphery of the upper valve body, a flushing port is arranged on the lower valve body, the connecting rod penetrates through the upper valve body and the diaphragm, the diaphragm is arranged at the upper end of the connecting rod and is arranged between the valve cover and the upper valve body, the connecting rod and the diaphragm are connected through a sealing chuck arranged in the valve cover, the lower end of the connecting rod is provided with a valve plug, a partition plate with an opening is arranged in the upper valve body and divides the upper valve body into a water inlet cavity and a water outlet cavity, a spring is arranged between the pressing plate and the sealing chuck, one end of the spring is fixed at the bottom of the sealing chuck, the other end of, thereby driving the diaphragm and the seal chuck.

Further optimize, go up the valve body and be provided with the disk seat, lower valve body is provided with lower disk seat.

Further optimize, be provided with the good valve plug packing ring of leakproofness in the valve plug.

Further optimize, the valve plug freely carries out up-and-down motion under the drive of connecting rod, the valve plug passes through the opening that connecting rod control closed or opened the disk seat.

Further optimize, the clamp plate passes through threaded connection at the last valve body to seal through the clamp plate sealing washer.

Further preferably, the upper valve body is connected with the connecting rod in an interference fit mode through a rod sleeve, and a cushion cylinder is arranged between the connecting rod and the rod sleeve.

Preferably, the number of the water outlets is 1-3, an additional valve is arranged on each water outlet to control the connection and disconnection of the water outlets, and a filter is connected to each water outlet and used for filtering impurities in the valve body.

The invention has the beneficial effects that:

1. the multi-outlet reverse flushing valve realizes the movement of the valve plug by the pressure difference between the diaphragm and the two sides of the sealing chuck, and can automatically switch the flow direction in the valve through the change of the liquid pressure intensity to realize the automatic back flushing of the filter;

2. the diaphragm driving structure can stably change the flow direction of water only by a short stroke, the water inlet is closed when the back flushing port is opened, and vice versa, so that the overflow of a filter or the mixing of clear water and waste water is avoided, meanwhile, the number of the water outlets is determined according to actual needs, when a plurality of water outlets share one flushing port, the cost can be reduced, the effect of multiple purposes of one valve can be achieved, in addition, the using number of the water outlets can be controlled through an additional valve, and the utilization rate of the through valve is improved;

in conclusion, the invention has simple structure and high reliability, can ensure long-time stable operation under the condition of no maintenance, has lower manufacturing cost and further reduces the cost of modern agriculture and industrial production.

Drawings

FIG. 1 is a schematic view of a back flush multi-way valve according to the present invention in a filtration mode of operation;

FIG. 2 is a schematic structural view of a back flush multi-way valve in a back flush mode of operation of the present invention;

reference numerals: 1. the valve comprises an upper valve body, 2, a valve plug, 3, a valve plug gasket, 4, a valve plug gasket, 5, a connecting rod, 6, a gasket cylinder, 7, a spring, 8, a sealing chuck, 9, a hydraulic control valve port, 10, a valve cover, 11, a diaphragm, 12, a pressure plate sealing ring, 13, a pressure plate, 14, an upper valve seat, 15, a lower valve seat, 16, a lower valve body, 17, a water inlet, 18, a water outlet, 19 and a flushing port.

Detailed Description

The technical solution of the present invention is further described by specific embodiments with reference to the accompanying drawings.

In order to make the objects, technical solutions and novel points of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

A kind of back flush valve, including upper valve block 1, lower valve block 16, diaphragm 11, tie rod 5 and valve bonnet 10 set up above said upper valve block 1, the upper valve block 1 has upper valve base 14, the lower valve block 16 has lower valve base 15, there are pressing plates 13 in the upper valve block 1, there are a water inlet 17 and multiple outlet 18 on the upper valve block 1, said water inlet 17 and said outlet 18 are laid on the periphery of the upper valve block 1 evenly, the outlet 18 is 1-3, there are additional valves on the outlet 18, in order to control the make-and-break of the outlet 18, the outlet 18 connects with the filter, impurity used for filtering the valve block; the lower valve body 16 is provided with a flushing port 19, the connecting rod 5 penetrates through the upper valve body 1 and the diaphragm 11, the diaphragm 11 is arranged at the upper end of the connecting rod 5 and between the valve cover 10 and the upper valve body 1, the connecting rod 5 and the diaphragm 11 are connected through a sealing chuck 8 arranged in the valve cover 10, the diaphragm 11 is transversely arranged and divides the upper part of the valve cover 10 into a control cavity, and the control cavity is used for injecting or discharging water through the hydraulic control valve port 9; the lower end of the connecting rod 5 is provided with a valve plug 2, the valve plug 2 divides the upper valve body 1 and the lower valve body 16 into a water inlet cavity and a water discharge cavity, a valve plug gasket 3 with good sealing performance is arranged in the valve plug 2, the valve plug 2 freely moves up and down under the driving of the connecting rod 5, and the valve plug 2 controls the opening of the upper valve seat 14 to be closed or opened through the connecting rod 5; a spring 7 is arranged between the pressing plate 13 and the sealing chuck 8, one end of the spring 7 is fixed at the bottom of the sealing chuck 8, the other end of the spring 7 is fixed on the pressing plate 13, and the pressure is controlled along with a hydraulic control valve port 9 arranged at the top end of the valve cover 10, so that the diaphragm 11 and the sealing chuck 8 are driven.

The pressure plate 13 is connected with the upper valve body 1 through threads and is provided with a pressure plate sealing ring 12 with good sealing performance, and a cushion cylinder 6 made of a self-lubricating material with good sealing performance is arranged between the pressure plate 13 and the connecting rod 5.

Example 1

The water inlet 17 is connected with a water inlet pipe, 1 water outlet 18 is connected with a water outlet pipe and a filter, the water outlet pipe is provided with a ball valve as a control switch, a lower end flushing port 19 is connected with a sewage well inlet, the hydraulic control valve port 9 controls pressurization in a filtering working state, high pressure is injected into a control cavity, the high pressure enables a diaphragm sheet 11 and a sealing chuck 8 to move downwards and compress a spring 7, the sealing chuck 8 drives a connecting rod 5 to extrude a valve plug 2 to enable the valve plug 2 to move downwards to be tightly combined with a lower valve seat 16, the flushing port 19 of the lower valve body 16 is isolated, the water outlet 18 of the upper valve body 1 is normally opened at the moment, when accumulated impurities on a filter layer are more, the resistance of the filter layer is larger during water inlet, the valve plug 2 is emptied through the hydraulic control valve port 9 to reduce the pressure of the control cavity, the spring 7 is, the valve plug 2 is moved upwards until the valve plug is tightly combined with the upper valve seat 14 to block the water inlet 17 of the upper valve body 1, at this time, the water outlet 18 and the flushing port 19 form a water discharge cavity, the water outlet 18 is used as a water inlet, the flushing port 19 is used as a normal opening, therefore, fluid flows out rapidly to achieve reverse backwashing, and the flushing valve enters a backwashing working state.

Example 2

A water inlet 17 is connected with a water inlet pipe, 3 water outlets 18 are respectively connected with three water outlet pipes and a filter, each water outlet pipe is provided with a spherical valve as a use switch, a bottom flushing port 19 is connected with a sewage well inlet, a hydraulic control valve port 9 performs pressurization work in a filtering work mode, high pressure is injected into a control cavity, the high pressure enables a diaphragm sheet 11 and a sealing chuck 8 to move downwards and compress a spring 7, the sealing chuck 8 extrudes a connecting rod 5 to drive a valve plug 2 to enable the valve plug 2 to be tightly combined with a lower valve seat 16, the flushing port 19 of the lower valve body 16 is isolated, the water outlet 18 of an upper valve body 1 is normally opened at the moment, accumulated impurities on a filter layer are more, resistance is larger when water passes through a filter layer, the hydraulic control valve port 9 starts evacuation work, the high pressure of the control cavity is reduced, the spring 7 is restored to an initial state to push the sealing chuck 8 and the diaphragm sheet 11 to, the water inlet 17 of the upper valve body 1 is blocked, at the moment, the water outlet 18 and the flushing port 19 form a water discharging cavity, the water outlet 18 is used as a new water inlet, the flushing port 19 is used as a normal opening, therefore, fluid flows out rapidly to achieve reverse backwashing, and the valve enters a backwashing working mode.

It is further noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The reverse flushing valve is characterized by comprising an upper valve body (1), a lower valve body (16), a diaphragm sheet (11), a connecting rod (5) and a valve cover (10) arranged above the upper valve body (1), wherein a pressing plate (13) is arranged in the upper valve body (1), the upper valve body (1) is provided with a water inlet (17) and a plurality of water outlets (18), the water inlet (17) and the water outlets (18) are uniformly distributed on the periphery of the upper valve body (1), the lower valve body (16) is provided with a flushing port (19), the connecting rod (5) penetrates through the upper valve body (1) and the diaphragm sheet (11), the diaphragm sheet (11) is arranged at the upper end of the connecting rod (5) and between the valve cover (10) and the upper valve body (1), the connecting rod (5) and the diaphragm sheet (11) are connected through a sealing chuck (8) arranged in the valve cover (10), and the lower end of the valve plug (5) is provided with a valve (2), the water-saving valve is characterized in that a partition plate with an opening is arranged in the upper valve body (1), the upper valve body is divided into a water inlet cavity and a water drainage cavity by the partition plate, a spring (7) is arranged between the pressing plate (13) and the sealing chuck (8), one end of the spring (7) is fixed at the bottom of the sealing chuck (8), the other end of the spring (7) is fixed on the pressing plate (13), and the pressure is adjusted through a hydraulic control valve port (9) arranged at the top end of the valve cover (10), so that the diaphragm (11) and the sealing chuck (8) are driven.

2. A back flush valve as defined in claim 1, wherein: the upper valve body (1) is provided with an upper valve seat (14), and the lower valve body (16) is provided with a lower valve seat (15).

3. A back flush valve as defined in claim 1, wherein: a valve plug gasket (3) with good sealing performance is arranged in the valve plug (2).

4. A back flush valve as defined in claim 2, wherein: the valve plug (2) is driven by the connecting rod (5) to freely move up and down, and the valve plug (2) is controlled by the connecting rod (5) to close or open the opening of the upper valve seat (14).

5. A back flush valve as defined in claim 1, wherein: the pressing plate (13) is fixedly connected with the upper valve body (1) through threads and is sealed through a pressing plate sealing ring (12).

6. A back flush valve as defined in claim 1, wherein: the upper valve body (1) is connected with the connecting rod (5) through a rod sleeve in an interference fit mode, and a cushion cylinder (6) is arranged between the connecting rod (5) and the rod sleeve.

7. A back flush valve as defined in claim 1, wherein: the number of the water discharge openings (18) is 1-3, an external valve is arranged on each water discharge opening (18) to control the on-off of each water discharge opening (18), and a filter is connected to each water discharge opening (18) and used for filtering impurities in the valve body.