CN214530740U - Easy clear check valve and underground pressure drainage system - Google Patents

Abstract

The utility model relates to an underground pressure drainage accessory field specifically is an easy clear check valve and underground pressure drainage system, include: a water outlet and a water inlet which are communicated with the middle cavity; a self-reset blocking piece for blocking the back flow of the silt is arranged in the middle cavity; the lateral wall of middle chamber is equipped with the opening, the lateral wall outwards extends along the opening, forms the scavenge port that can open. The check valve is used for underground pressure drainage operation with water quality containing much sediment, and can effectively avoid the phenomenon that the check valve cannot be normally conducted again due to sediment deposition in a pipe in the middle cavity of the check valve in the intermittent water pumping process when the pump is stopped. The valve is arranged in the water outlet pipeline of the sewage pump, so that the problem that the sewage pump is blocked due to sediment deposition can be avoided. Through setting up the scavenge port at the lateral wall, make the valve when blockking up, can clear up fast, need not whole clearance of detaching or borrow the instrument, make the clearance and the maintenance of check valve more convenient and fast.

Description

Easy clear check valve and underground pressure drainage system

Technical Field

The utility model relates to an underground pressure drainage accessory field, more specifically relates to an easy clear check valve and underground pressure drainage system.

Background

Engineering construction performed below the underground water level can be encountered in the building construction process, and when the engineering construction is performed below the underground water level, underground water in a foundation pit is often required to be manually extracted and removed to stabilize a soil body, so that safe construction is guaranteed. The inside of the foundation pit can be influenced by various water flows, such as water seeping from a side slope and the bottom of the pit, rainwater and the like, and the water bodies can continuously enter the foundation pit and cannot be completely emptied at one time in actual engineering operation. In the foundation pit, therefore, an underground pressure drainage system is generally provided for continuously performing the underground pressure drainage work.

The drainage speed of the drainage system is higher than the water increasing speed certainly, so that the drainage system can be automatically stopped when the water body is pumped to reach a certain state, and the drainage system can be started to drain water after the water body is accumulated to a certain height, so that the drainage system is mostly in an unmanned automatic control state. These underground water bodies usually contain a large amount of silt and debris, and no matter a large amount of silt backward flow when stopping the pump, still bold debris are drawn into the pump and all cause the dredge pump to block up easily, and traditional method is through setting up the filtration at the mouth that draws water of pump, but filters the hole too big and can't prevent that silt from getting into in the pump, filters the hole too little and often blocks up the filter orifice again.

The filter plugging requires frequent cleaning each time the pump plugs, which greatly impedes the efficiency of the underground pressure drainage system. There is a need for a way to prevent pump clogging and to easily clean up the clogged pump to address the effect of mud water on the drainage system, improve the efficiency of the drainage system, and reduce maintenance time.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome at least one defect of the prior art, and provides an easy-to-clean check valve, which is used for solving the problem that how to quickly and conveniently clean the check valve and reduce the maintenance time without the need of matching a specific tool and disassembling the check valve when in blockage; and further provides an underground pressure drainage system for solve how to prevent silt backward flow when stopping the pump and block up the dredge pump, lead to the problem of drainage inefficiency.

The utility model discloses the technical scheme who takes is, an easy clear check valve, include: a water outlet and a water inlet which are communicated with the middle cavity; a self-reset blocking piece for blocking the back flow of the silt is arranged in the middle cavity; the lateral wall of middle chamber is equipped with the opening, the lateral wall outwards extends along the opening, forms the scavenge port that can open. The check valve is used for underground pressure drainage operation with water quality containing much sediment, and can effectively avoid the phenomenon that the check valve cannot be normally conducted again due to sediment deposition in the check valve in a pump stopping process in an intermittent water pumping process. The valve is arranged in the water outlet pipeline of the sewage pump, so that the problem that the sewage pump is blocked due to sediment deposition can be avoided. Through setting up the scavenge port at the lateral wall, make the valve when blockking up, can clear up fast, need not whole clearance of detaching, make the clearance and the maintenance of check valve more convenient and fast.

According to the technical scheme, the cleaning opening is provided with an end cover with a sealing piece, the end cover is movably connected with the cleaning opening, and the cleaning opening is opened or closed through the end cover. The fixed wall that has the outside extension of scavenge port, the fixed wall provides the multiple convenient swing joint mode that opens fast and close for the end cover, closes the in-process of scavenge port at the end cover, forms the sealed shutoff to the scavenge port through the sealing member of extrusion setting between end cover and scavenge port.

This technical scheme is, outlet, water inlet and the center of blockking from restoring to the throne are located the same axis, it includes to block to restore to the throne from the throne: the elastic reset piece is fixed on the water outlet; the blocking flap is connected with the elastic resetting piece and is pushed by the elastic resetting piece to continuously extrude and seal the water inlet; the cleaning opening is over against the elastic reset piece. Elasticity resets and promotes to the direction of water inlet along the outlet and blocks lamella shutoff water inlet, the check valve blocks up mostly silt and gathers the action that has influenced elasticity and resets, and the scavenge port just can reset through simple bar instrument to elasticity, directly passes the scavenge port and will block the silt that elasticity resets and loosen, makes to block lamella ability local rising, and hydroenergy gets into the lumen once more, improves the efficiency of clearance.

The technical scheme is that the two ends of the middle cavity are narrow, the middle of the middle cavity is wide, and the water outlet and the water inlet are respectively positioned at the two ends of the middle cavity; the cleaning opening is positioned on the side wall in the middle of the middle cavity. The flow inside the check valve is guaranteed by the aid of the design of the middle width, when the blocking flap rises, water flows to the water outlet through the periphery of the blocking flap, the flow area around the opening of the blocking flap is increased by the design of the middle width of the middle cavity, and resistance of the middle cavity to the water is reduced.

The technical scheme is that a fixing arm for fixing an elastic reset piece is arranged on the water outlet; one end of the fixed arm is connected with the center of the water outlet to form a mounting position, and the other end of the fixed arm is connected with the edge of the water outlet; one end of the elastic reset piece is fixed on the mounting position. The elastic reset piece is fixed through the fixing arm, so that the blocking of the water outlet is reduced.

This technical scheme is, water inlet and outlet are equipped with the flange, and are applicable to the body that the pipe diameter is 40mm to 500 mm. The flange is beneficial to saving space, reducing weight and having good sealing performance. The pipe diameter is 40mm to 500mm, and the small-diameter check valve is easy to frequently block; and the cleaning opening of the large-diameter one-way valve can be correspondingly enlarged, and if the cleaning opening is too large, the quick, simple and convenient opening and closing operation of the end cover is not facilitated.

The technical scheme is that the barrier flap is cast iron and is completely lined with nitrile rubber. The structure of cast iron and full lining nitrile rubber makes the barrier flap have better oil resistance, wearability and heat resistance, and nitrile rubber has protected the cast iron, prevents it to be oxidized in aqueous, and certain elastic energy that itself has takes place slight deformation when extrusion inlet edge in addition helps the sealed to the water inlet.

According to the technical scheme, the end cover is provided with a circular ring or symmetrical handles. The circular ring can assist in opening the end cover through any strip-shaped tool when the end cover is clamped; while a symmetrical handle can be provided on a larger end cap for easier manual opening.

According to the technical scheme, a circle of annular protrusions made of nitrile rubber are arranged at the bottom of the blocking flap. The annular projection of the nitrile rubber helps to relieve the impact of the barrier flap on the rim of the water inlet.

This technical scheme is, an use underground pressure drainage system of check valve for the underground pressure drainage operation that silt content is high includes: the sewage pump is used for pumping the water body with high silt content from the underground and discharging the water body to the upper part; a pipe body; the water outlet of the sewage pump is connected with the water inlet of the one-way valve through a pipe body; the check valve is higher than the sewage pump and is used for blocking back-flowing sediment when the pump is stopped. The pollution discharge pump is prevented from being blocked through the one-way valve, the blockage prevention and the convenient maintenance of the whole drainage system are promoted through the one-way valve, and the integral operation efficiency is improved.

Compared with the prior art, the beneficial effects of the utility model are that: by arranging the check valve, the blockage of a water outlet of the sewage discharge pump due to the backflow and deposition of silt through the vertical pipe during the intermittent water pumping process is avoided; through set up the scavenge port that makes things convenient for the switch at the check valve lateral wall, make the check valve clear up fast when blockking up, need not whole clearance of detaching, make the clearance of check valve more convenient with the maintenance to improve and maintained speed, promoted drainage efficiency.

Drawings

Fig. 1 is an overall schematic view of an easy-to-clean check valve of the present invention.

Fig. 2 is a top view of an easy-to-clean check valve of the present invention.

Fig. 3 is a perspective view of an easy-to-clean check valve of the present invention.

Fig. 4 is a schematic view of an underground pressure drainage system according to the present invention.

Description of reference numerals: the sewage treatment device comprises a middle cavity 100, a water outlet 200, a fixed arm 210, a mounting position 211, a water inlet 300, a self-resetting blocking piece 400, an elastic resetting piece 410, a blocking flap 420, an annular bulge 421, a cleaning opening 500, a fixed wall 510, an end cover 600, a sealing piece 610, a one-way valve 001, a sewage pump 002 and a stand pipe 004.

Detailed Description

The drawings of the present invention are for illustration purposes only and are not to be construed as limiting the invention. For a better understanding of the following embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

Example 1

As shown in fig. 1, the present embodiment is an easy-to-clean check valve 001, including: a drain port 200 and a water inlet port 300 communicating with the middle chamber 100; a self-reset blocking piece 400 for blocking the back flow of silt is arranged in the middle cavity 100; the centers of the drain port 200, the inlet port 300 and the self-resetting stopper 400 are located on the same axis, and the side wall of the middle chamber 100 is provided with an opening along which the side wall extends outward to form an openable cleaning port 500. Be used for quality of water to contain the underground pressure drainage operation that silt is many with check valve 001, can effectively avoid intermittent type pumping process, silt backward flow deposit leads to the problem that dredge pump 002 delivery port blockked up when stopping the pump, through set up cleaning opening 500 at the lateral wall, makes the middle chamber clear up fast when blockking up, need not whole clearance of detaching, makes the clearance and the maintenance of check valve 001 more convenient.

The water inlet 300 of check valve 001 links to each other with dredge pump 002, and dredge pump 002 is with the underground water that contains silt volume greatly outside the pipe body is pumped to the top, because underground water can't once be by the complete pumping, along with the increase of time, the water yield can rise the sustained change gradually more. When the water reaches a certain amount, the water is automatically drained, and the water amount drops to a preset position, so that the sewage pump 002 automatically stops. During the stopping process, part of water and silt which do not completely flow out of the pipe body can generate backflow due to the negative pressure in the stand pipe 004, and most of the part of water is water with particularly high silt content which is used as the bottom of the area. If the water body containing 10% of silt flows back, the 3 m vertical pipe 004 deposits silt which is close to 30cm above the check valve 001; when the water body containing 20% of silt flows back, the 10-meter vertical pipe 004 deposits silt close to 2m above the check valve 001, so that the silt is easy to accumulate in the check valve 001 in a large amount after flowing back, and when the water flow moves, the silt is continuously and uniformly mixed with the water, so that blockage cannot be caused. However, as the pump stopping time increases, the accumulated silt is easy to agglomerate, and the agglomeration is easy to cause the one-way valve 001 to be blocked. The lateral wall of middle chamber 100 forms the scavenge port 500 of being convenient for open fast, when check valve 001 blockked up, only need manual or cooperate some simple instruments just can open scavenge port 500 fast to break loose the silt that disturbs the elasticity piece, let and block piece 400 after can partly open from restoring to the throne, just can resume the function of check valve 001 fast through water flow washing. The arrangement of the cleaning opening 500 reduces the time for completely dismounting the one-way valve 001 or completely dismounting one end of the one-way valve by a special tool in the past for cleaning, and avoids the problem of long maintenance and cleaning time caused by the fact that water and silt accumulated in the pipe body can be emptied to be connected again after the cleaning is finished. And under the condition that skilled operation and the one-way valve 001 cleaning port 500 can be quickly opened and closed, a user can even complete the operation under the condition that the sewage pump 002 is not stopped, so that the cleaning of the one-way valve 001 is more convenient, and the efficiency of maintenance and cleaning is improved.

The cleaning opening 500 is provided with an end cover 600 with a sealing member 610, the end cover 600 is movably connected with the cleaning opening 500, and the cleaning opening 500 opens or closes the cleaning opening 500 through the end cover 600. The cleaning opening 500 has an outwardly extending fixed wall 510, and the fixed wall 510 provides the end cap 600 with a plurality of movable connection ways for easy and quick opening and closing, and a sealing block for the cleaning opening 500 is formed by pressing the sealing member 610 disposed between the end cap 600 and the cleaning opening 500 during the process of closing the cleaning opening 500 by the end cap 600. The cleanout 500 extends from the side wall, which allows the cleanout 500 to present a length of the retaining wall 510, which allows the retaining wall 510 to be further machined to obtain a mating surface that is secured and mated with the end cap 600. Further, the cleaning opening 500 is circular, and the section of the cleaning opening is circular on the fixing wall 510, and the end cover 600 can adopt a threaded connection, a bayonet connection, a connection mode of matching a folding connection piece with a buckle, and the like, so that the end cover 600 can be quickly opened and closed under the manual operation. The sealing member 610 can be a sealing sheet, a sealing ring, a sealing plug, or the like, one end of the sealing member 610 is fixed to a surface of the end cap 600 facing the cleaning opening 500, and when the end cap 600 is closed, the end cap 600 presses against the fixing wall 510 of the cleaning opening 500 to close the cleaning opening 500.

The self-resetting barrier 400 includes: an elastic restoring member 410 fixed to the drain port 200; a blocking flap 420 connected to the elastic restoring member 410, continuously pressed by the elastic restoring member 410 and closing the water inlet 300; the cleaning opening 500 faces the elastic restoring member 410. Elasticity resets piece 410 and promotes along outlet 200 and block lamella 420 shutoff water inlet 300 to the direction of water inlet 300, and check valve 001 blocks up mostly silt and accumulates the action that has influenced elasticity resets piece 410, and the scavenge port 500 just resets piece 410 to elasticity can be through simple bar instrument, directly passes scavenge port 500 and will block the silt that elasticity resets piece 410 and loosen, and the messenger blocks lamella 420 and can rise locally, and hydroenergy reentrant intracavity improves the efficiency of clearance.

When the pressure of the water provided by the sewage pump 002 is higher than the pressure of the elastic restoring piece 410 on the blocking flap 420, the blocking flap 420 is pushed open, and the water enters the one-way valve 001 and flows out of the water outlet 200. The back-flowing silt will accumulate on the back of the barrier flap 420 when the pump is stopped and enter between the deformed gaps of the elastic restoring member 410, and if the silt content is too high, the elastic restoring member 410 cannot be deformed, so that the barrier flap 420 cannot be pushed. The cleaning opening 500 is opened, a strip-shaped tool, such as a common screwdriver, a hard slender rod and the like, enters from the cleaning opening 500 to loosen the gaps and the peripheral silt accumulated on the elastic resetting piece 410, so that the blocking flap 420 can partially ascend, after the partial ascent, water enters the middle cavity 100 of the one-way valve 001 to gradually flush and take away the silt accumulated above, and the recovery function of the one-way valve 001 is gradually and completely opened. The cleaning opening 500 is over against the elastic reset piece 410, so that maintenance personnel can conveniently and quickly get through the blockage, and the cleaning device can also be operated in an environment with insufficient illumination. The cleaning is simpler and more convenient, and the efficiency is higher.

The middle cavity 100 is narrow at both ends and wide in the middle, and the water outlet 200 and the water inlet 300 are respectively positioned at both ends of the middle cavity 100; the scavenge port 500 is located on the side wall of the middle portion of the middle chamber 100. The two ends of the middle cavity 100 are narrow, the flow inside the one-way valve 001 is ensured by the design of the middle width, when the blocking flap 420 rises, water flows to the water outlet 200 through the periphery of the blocking flap 420, the flow area around the completely opened blocking flap 420 is increased by the design of the middle width of the middle cavity 100, and the resistance of the middle cavity to water is reduced. The scavenge port 500 is located on the side wall of the middle portion of the middle chamber 100. in particular, the center line of the cross section of the scavenge port 500 is perpendicular to the center axis of the drain port 200, the inlet port 300 and the self-resetting barrier 400. The purge port 500 and the self-resetting barrier 400 do not interfere with each other and do not affect each other.

As shown in fig. 3, the drain opening 200 is provided with a fixing arm 210 for fixing the elastic restoring member 410; one end of the fixing arm 210 is connected with the center of the water discharge opening 200 to form a mounting position 211, and the other end is connected with the edge of the water discharge opening 200; one end of the elastic reset piece 410 is fixed on the mounting position 211. Securing resilient return 410 by securing arm 210 helps to reduce snagging on drain opening 200. The fixing arm 210 is a strip-shaped fixing part, the fixing arm 210 generally has a combination of two, three, and four, when the fixing arm 210 is two, the two fixing arms 210 are in a straight line, and when the fixing arm 210 is three or more, the included angle between the fixing arm 210 and the fixing arm 210 is consistent; furthermore, the number of the fixing arms 210 is three, and the fixing arms are 120 ℃ to each other, so that the uniform stress of each fixing arm 210 is ensured, and the shielding of the fixing arm 210 on the water outlet 200 is reduced to a greater extent.

The water inlet 300 and the water outlet 200 are provided with flanges and are suitable for pipe bodies with the pipe diameters of 40mm to 500 mm. The flange is beneficial to saving space, reducing weight and having good sealing performance. Check valve 001 is applicable to the pipe body that the pipe diameter is between 40mm to 500mm, and the pipe body is big more, and the volume of check valve 001 is big more, owing to be used for the drainage of underground silt content, and the jam frequently takes place easily for the undersize of check valve 001 to need frequent clearance, be unfavorable for going on smoothly of drainage operation. For the large-diameter one-way valve, the diameter of the cleaning opening of the large-diameter one-way valve reaches DN100, so that the cleaning requirement can be met, the cleaning opening cannot be continuously increased along with the increase of the valve body, and the end cover can be quickly and conveniently opened and closed. The one-way valve 001 is more suitable for use among stand pipes 004 with pipe diameters of 50-300mm which are commonly used in daily life.

The barrier flap 420 is cast iron and is fully lined with nitrile rubber. The structure of cast iron and full lining nitrile rubber makes stop flap 420 have better oil resistance, wearability and heat resistance, nitrile rubber plays the effect of protection cast iron, has covered a layer of protective layer on the cast iron equivalently, has insulated the contact of cast iron and water, prevents that the cast iron from soaking for a long time in water and oxidizing and rusting, and certain elasticity that nitrile rubber itself has can take place slight deformation when extrusion inlet 300 edge, has avoided the contact between the middle chamber of cast iron and metal, is favorable to the sealed of water inlet 300.

The end cap 600 is provided with a circular ring or a symmetrical handle. The circular ring can assist in opening the end cover 600 through any strip-shaped tool when the end cover 600 is clamped; while a symmetrical handle can be provided on a larger end cap 600 for easier manual opening. The one-way valve 001 is enlarged as the pipe diameter of the pipe body to which it is applied is increased, and the cleaning opening 500 is appropriately enlarged as the one-way valve 001 is increased. The end cap 600 is fixed on the fixing wall 510 by threads or a buckle, and when the one-way valve 001 is applied to a pipeline with a pipe diameter less than 300, the end cap 600 is small, such as: the pipe diameter is 100mm and 200mm, and the switch can be completed manually, so a circular ring or a handle is not needed; when check valve 001 was applicable to pipe diameter 300 to 500mm, because end cover 600 is great relatively, and the screw thread is longer, silt caused the chucking easily, if: 300mm, 400mm so set up the ring side more or the handle is convenient to open and close, also can adopt bar-shaped bar instrument to assist to open and close, and this instrument can also be used to the clearance in the scavenge port 500 simultaneously.

The bottom of the stop flap 420 is provided with a ring of annular protrusions 421 of nitrile rubber. The annular protrusion 421 of nitrile rubber helps to relieve the impact of the stop flap 420 on the rim of the water inlet 300. The annular protrusion 421 is better able to form a seal between the stop flap 420 and the water inlet 300.

Example 2

As shown in fig. 4, the present embodiment is an underground pressure drainage system using a check valve 001, which is used for underground pressure drainage operation with high sediment content, and includes: the sewage pump 002 pumps the water body with high silt content from the underground and discharges the water body to the upper part; a pipe body; the water outlet of the sewage pump 002 is connected with the water inlet 300 of the one-way valve 001 through a pipe body; the one-way valve 001 is higher than the sewage pump 002 and is used for blocking back-flowing sediment when the pump is stopped.

The dredge pump 002 can be a submersible dredge pump 002, and in the process of pumping underground working environment water, water is preliminarily filtered through a coarse screen, so that large sundries are prevented from entering the dredge pump 002. But silt can not be removed because of small particles, and the silt is carried out along with the water pumping process. As the groundwater level becomes lower and lower, the silt content becomes higher, and after the pumping to the designated location, the sewage pump 002 is stopped. Because the negative pressure in the body, the water that does not flow out completely can produce the backward flow, through setting up check valve 001, the separation a large amount of silt of backward flow blocks silt outside dredge pump 002. The advantage of this is that, the repair time of blockking up dredge pump 002 is long, and blockking up check valve 001 then can clear up fast, need not to dismantle moreover, has effectively improved efficiency. After setting up check valve 001, the body length between check valve 001 and dredge pump 002 is short, and the water that contains silt is few, even silt is gathered and can not lead to dredge pump 002 to be blockked up yet, but check valve 001 is long to outside outlet 200's riser 004, and when this partial body water that does not discharge can communicate silt together backward flow to check valve 001 department, even the silt content is not high, nevertheless because the length of riser 004 leads to the silt content of the total backward flow big, a large amount of silt is gathered at the back that blocks lamella 420 of check valve 001. Under the effect of blocking lamella 420 for this silt that can flow back dredge pump 002 is blockked up, has avoided dredge pump 002 to block up, and the scavenge port 500 that is equipped with on the check valve 001 further provides convenience for the maintenance of check valve 001, has promoted stifled and the maintenance of being convenient for of whole drainage system, has improved holistic operating efficiency.

A one-way valve 001, comprising: a drain port 200 and a water inlet port 300 communicating with the middle chamber 100; a self-reset blocking piece 400 for blocking the back flow of silt is arranged in the middle cavity 100; the centers of the drain port 200, the inlet port 300 and the self-resetting stopper 400 are located on the same axis, and the side wall of the middle chamber 100 is provided with an opening along which the side wall extends outward to form an openable cleaning port 500. Be used for quality of water to contain the underground pressure drainage operation that silt is many with check valve 001, can effectively avoid intermittent type pumping process, silt backward flow deposit leads to the problem that dredge pump 002 delivery port blockked up when stopping the pump, through set up cleaning opening 500 at the lateral wall, makes the middle chamber clear up fast when blockking up, need not whole clearance of detaching, makes the clearance and the maintenance of check valve 001 more convenient.

The water inlet 300 of check valve 001 links to each other with dredge pump 002, and dredge pump 002 is with the underground water that contains silt volume greatly outside the pipe body is pumped to the top, because underground water can't once be by the complete pumping, along with the increase of time, the water yield can rise the sustained change gradually more. When the water reaches a certain amount, the water is automatically drained, and the water amount drops to a preset position, so that the sewage pump 002 automatically stops. During the stopping process, part of water and silt which do not completely flow out of the pipe body can generate backflow due to the negative pressure in the stand pipe 004, and most of the part of water is water with particularly high silt content which is used as the bottom of the area. In this embodiment, the distance between the check valve 001 and the water outlet of the sewage pump 002 is 1 meter, the vertical pipe 004 above the check valve 001 is 8 meters, and the pipe diameter is 100 mm. When the check valve 001 blocks up, only need manually or cooperate some simple instruments just can open the scavenge port 500 fast to loosen the silt that disturbs the elastic barrier piece, let after the barrier piece 400 can partially open from restoring to the throne, just can resume the function of check valve 001 fast through rivers wash.

The cleaning opening 500 is provided with an end cover 600 with a sealing member 610, the end cover 600 is movably connected with the cleaning opening 500, and the cleaning opening 500 opens or closes the cleaning opening 500 through the end cover 600. The cleaning opening 500 has an outwardly extending fixed wall 510, and the fixed wall 510 provides the end cap 600 with a plurality of movable connection ways for easy and quick opening and closing, and a sealing block for the cleaning opening 500 is formed by pressing the sealing member 610 disposed between the end cap 600 and the cleaning opening 500 during the process of closing the cleaning opening 500 by the end cap 600. The cleanout 500 extends from the side wall, which allows the cleanout 500 to present a length of the retaining wall 510, which allows the retaining wall 510 to be further machined to obtain a mating surface that is secured and mated with the end cap 600. The cleaning opening 500 is formed in a circular shape and has a circular cross section on the fixing wall 510, and the end cap 600 is screwed, so that the end cap 600 can be rapidly opened and closed by manual operation. The sealing member 610 is a sealing sheet, one end of the sealing member 610 is fixed to a surface of the end cap 600 facing the cleaning opening 500, and when the end cap 600 is closed, the end cap 600 presses against the fixing wall 510 of the cleaning opening 500 to close the cleaning opening 500.

The self-resetting barrier 400 includes: an elastic restoring member 410 fixed to the drain port 200; a blocking flap 420 connected to the elastic restoring member 410, continuously pressed by the elastic restoring member 410 and closing the water inlet 300; the cleaning opening 500 faces the elastic restoring member 410. When the pressure of the water provided by the sewage pump 002 is higher than the pressure of the elastic restoring piece 410 on the blocking flap 420, the blocking flap 420 is pushed open, and the water enters the one-way valve 001 and flows out of the water outlet 200. The back-flowing silt will accumulate on the back of the barrier flap 420 when the pump is stopped and enter between the deformed gaps of the elastic restoring member 410, and if the silt content is too high, the elastic restoring member 410 cannot be deformed, so that the barrier flap 420 cannot be pushed. The cleaning opening 500 is opened, a strip-shaped tool, such as a common screwdriver, a hard slender rod and the like, enters from the cleaning opening 500 to loosen the gaps and the peripheral silt accumulated on the elastic resetting piece 410, so that the blocking flap 420 can partially ascend, after the partial ascent, water enters the middle cavity 100 of the one-way valve 001 to gradually flush and take away the silt accumulated above, and the recovery function of the one-way valve 001 is gradually and completely opened. The cleaning opening 500 is over against the elastic reset piece 410, so that maintenance personnel can conveniently and quickly get through the blockage, and the cleaning device can also be operated in an environment with insufficient illumination.

The middle cavity 100 is narrow at both ends and wide in the middle, and the water outlet 200 and the water inlet 300 are respectively positioned at both ends of the middle cavity 100; the scavenge port 500 is located on the side wall of the middle portion of the middle chamber 100. The two ends of the middle cavity 100 are narrow, the flow inside the one-way valve 001 is ensured by the design of the middle width, when the blocking flap 420 rises, water flows to the water outlet 200 through the periphery of the blocking flap 420, the flow area around the completely opened blocking flap 420 is increased by the design of the middle width of the middle cavity 100, and the resistance of the middle cavity to water is reduced. The scavenge port 500 is located on the side wall of the middle portion of the middle chamber 100, and the center line of the cross section of the scavenge port 500 is perpendicular to the center axis of the drain port 200, the inlet port 300, and the self-resetting barrier 400. The purge port 500 and the self-resetting barrier 400 do not interfere with each other and do not affect each other.

As shown in fig. 2, the drain opening 200 is provided with a fixing arm 210 for fixing the elastic restoring member 410; one end of the fixing arm 210 is connected with the center of the water discharge opening 200 to form a mounting position 211, and the other end is connected with the edge of the water discharge opening 200; one end of the elastic reset piece 410 is fixed on the mounting position 211. Securing resilient return 410 by securing arm 210 helps to reduce snagging on drain opening 200. The fixing arm 210 is a strip-shaped fixing piece, the number of the fixing arms 210 is three, and the fixing arms 210 are mutually 120 ℃, so that the uniform stress of each fixing arm 210 is ensured, and the shielding of the fixing arm 210 on the water outlet 200 is reduced to a greater extent.

The water inlet 300 and the water outlet 200 are provided with flanges and are suitable for a pipe body with a pipe diameter of 100 mm. The flange is beneficial to saving space, reducing weight and having good sealing performance. The barrier flap 420 is cast iron and is fully lined with nitrile rubber. The structure of cast iron and full lining nitrile rubber makes the stop flap 420 have better oil resistance, wearability and heat resistance, nitrile rubber plays the effect of protection cast iron, has covered a layer of protective layer on the cast iron equivalently, has isolated the contact of cast iron and water, prevents that the cast iron from soaking for a long time in water and oxidizing and rusting, and certain elasticity that nitrile rubber itself has can take place slight deformation when extrusion inlet 300 edge, has avoided the contact between the discharge port of cast iron and metal, is favorable to the sealed of water inlet 300.

The end cap 600 is provided with a ring, and the bottom of the blocking flap 420 is provided with a ring-shaped protrusion 421 made of nitrile rubber. The annular protrusion 421 of nitrile rubber helps to relieve the impact of the stop flap 420 on the rim of the water inlet 300. The annular protrusion 421 is better able to form a seal between the stop flap 420 and the water inlet 300.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the technical solutions of the present invention, and are not limitations to the specific embodiments of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims (10)

1. An easy to clean one-way valve comprising:

a water outlet and a water inlet which are communicated with the middle cavity;

the middle cavity is internally provided with a self-reset blocking piece for blocking the back flow of silt and is characterized in that,

the lateral wall of middle chamber is equipped with the opening, the lateral wall outwards extends along the opening, forms the scavenge port that can open.

2. An easy-to-clean one-way valve according to claim 1, wherein the scavenge port is provided with an end cap with a seal that is in movable connection with the scavenge port, the scavenge port opening or closing the scavenge port via the end cap.

3. An easy to clean one way valve according to claim 1 wherein the centre of the drain, inlet and self-resetting barrier are on the same axis, the self-resetting barrier comprising:

the elastic reset piece is fixed on the water outlet;

the blocking flap is connected with the elastic resetting piece and is pushed by the elastic resetting piece to continuously extrude and seal the water inlet;

the cleaning opening is over against the elastic reset piece.

4. An easy-to-clean one-way valve according to claim 1,

the two ends of the middle cavity are narrow, the middle of the middle cavity is wide, and the water outlet and the water inlet are respectively positioned at the two ends of the middle cavity;

the cleaning opening is positioned on the side wall in the middle of the middle cavity.

5. An easy-to-clean one-way valve according to claim 1,

a fixing arm for fixing the elastic reset piece is arranged on the water outlet;

one end of the fixed arm is connected with the center of the water outlet to form a mounting position, and the other end of the fixed arm is connected with the edge of the water outlet;

one end of the elastic reset piece is fixed on the mounting position.

6. An easily cleaned check valve as claimed in claim 1, wherein the water inlet and outlet are flanged and are adapted to a pipe of 40mm to 500mm diameter.

7. An easy to clean, one way valve according to claim 3 wherein the barrier flap is cast iron and is fully lined with nitrile rubber.

8. An easy to clean, one way valve according to claim 2 wherein the end cap is provided with a circular ring or symmetrical handle.

9. An easy to clean, one way valve according to claim 7 wherein the barrier flap is provided at its base with a ring of annular projection of nitrile rubber.

10. An underground pressure drainage system using the check valve of any one of claims 1 to 9 for underground pressure drainage operation with high sediment content, comprising:

the sewage pump is used for pumping the water body with high silt content from the underground and discharging the water body to the upper part;

a pipe body;

it is characterized in that the preparation method is characterized in that,

the water outlet of the sewage pump is connected with the water inlet of the one-way valve through a pipe body;

the check valve is higher than the sewage pump and is used for blocking back-flowing sediment when the pump is stopped.

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