CN213117603U - Drainage non return system - Google Patents

Abstract

The utility model relates to a drainage non return system belongs to building feedwater drainage technical field, has solved current gravity drainage system and has used in the basement drainage, can't prevent to take place the problem of flowing backward. The concave drainage check valve comprises a valve body (1) and a valve plate (2), wherein the valve plate (2) is rotatably connected with the valve body (1); the upstream surface and/or the downstream surface of the valve plate (2) are/is a concave curved surface; the gravity center of the valve plate (2) is positioned at the middle lower part of the valve plate (2). The utility model has the advantages of simple structure, it is with low costs, can be applied to basement gravity drainage system, and can effectively prevent to take place the drainage and flow backward.

Description

Drainage non return system

Technical Field

The utility model relates to a building water supply and drainage technical field especially relates to a spill drainage check valve and drainage non return system.

Background

In the regulation of 'building water supply and drainage design standard' GB50015-2019, a sewage collecting tank, a sewage pump or a finished product sewage lifting device is arranged when the indoor ground of a building is lower than the outdoor ground.

For a drainage system provided with a sewage collecting tank and a sewage pump, the collecting tank has a certain volume, the water yield of the drainage pump is at least 5min, the installation and inspection requirements of a water pump, a water level controller, a grating and the like are met, and a flushing pipe and an alarm device with an over-warning water level are required to be arranged at the bottom of the tank. It can be known from above design requirement that the mode that adopts catch basin, sewage pump must occupy huge space as the basement drainage, and sewage is in quiescent condition in the pond, and dwell time is longer, causes the filth deposit easily, blocks up the pipeline. In the aspect of drainage reliability, if the existing gravity drainage system is applied to basement drainage, the reliability is poor, and the reason is that even though the height difference between the basement and the bottom of the outdoor inspection well can meet the conditions that drainage gravity flows to the outdoor inspection well, if the conditions of rainstorm, blockage of the downstream of an outdoor pipe network and the like are met, the water level of rain sewage in the outdoor inspection well is high, and the risk that the rain sewage flows to the indoor along the drainage pipeline of the basement exists.

Therefore, in the current technical system, the method of directly adopting the gravity drainage system to drain the sewage and wastewater of the basement is not used.

SUMMERY OF THE UTILITY MODEL

In view of the above analysis, the present invention aims to provide a concave drainage check valve and drainage non-return system for solving the problem that the existing gravity drainage system is applied to basement drainage and cannot prevent backflow.

The purpose of the utility model is mainly realized through the following technical scheme:

on one hand, the concave drainage check valve comprises a valve body and a valve plate, wherein the valve plate is rotatably connected with the valve body; the upstream surface and/or the downstream surface of the valve plate are/is a concave curved surface.

Further, the center of gravity of the valve plate is located at the middle lower part of the valve plate.

Furthermore, an electromagnetic coil is arranged on the valve body, an inner core of the valve body is made of soft iron, and the electromagnetic coil is used for generating magnetic attraction force on the valve plate after being electrified.

Furthermore, a plurality of point-shaped permanent magnet magnets are arranged at the positions where the valve body and the valve plate are attached to each other.

Further, the concave drainage check valve also comprises a motor, an output shaft of the motor is connected with the valve plate, and the valve plate is driven to open or close through the motor.

Furthermore, the upper end of the valve plate is fixedly provided with a manual connecting rod.

Further, the valve body and the valve plate are sealed through a sealing gasket.

Furthermore, the valve body is provided with a groove for installing a sealing gasket, and the sealing gasket is arranged in the groove of the valve body.

Furthermore, in a natural state, the valve plate sags under gravity to be in a closed state, and the inclination angle between the symmetrical center line of the valve plate and the vertical direction is 10-25 degrees.

Further, the valve body is connected with the valve plate through a rotating shaft, or the valve body is connected with the valve plate through a ring locking and buckling connecting piece.

In another aspect, a drain check system is also provided, comprising a check outer tube and the concave drain check described above;

the concave drainage check valve is arranged in the check valve outer pipe and divides the check valve outer pipe into an upstream cavity and a downstream cavity, the concave drainage check valve can be opened under the control of the impact or external force of upstream water flow to enable the upstream cavity to be communicated with the downstream cavity, and the concave drainage check valve can be closed under the control of self gravity or external force to enable the upstream cavity to be sealed and separated from the downstream cavity.

Furthermore, a detachable outer tube cover is arranged on the outer tube of the check valve.

Further, be provided with the valve body installing port on the outer tube cover, the valve body passes through rotating assembly and installs in the valve body installing port, sets up in the check valve outer tube after valve block and the valve body equipment.

Further, the outer tube cover is provided with an observation window.

Compared with the prior art, the utility model discloses one of following beneficial effect has at least:

a) the utility model provides a spill drainage check valve reaches, is the spill curved surface through the upstream surface and/or the dorsal surface with the valve block, and the invalid loss of rivers when can reduce the impact valve block, and the inner concave curved surface can increase the lifting surface area of valve block, and the non return job stabilization nature that improves the check valve can be showing to the structure setting of spill curved surface. When the water flow impacts the water surface of the valve plate, the concave curved surface can enhance the effect of opening the valve plate, and the valve plate is convenient to open; when sewage flows backwards, the backflow water impacts the back water surface of the valve plate, the concave curved surface can enhance the effect of closing the valve plate, and the valve plate is convenient to close. The utility model discloses a spill drainage check valve, simple structure, it is with low costs, can wide application in basement gravity drainage system, effectively prevent that the drainage from flowing backward, work safe and reliable.

b) The utility model provides a drainage non return system adopts simple structure, with low costs, the good spill drainage check valve of job stabilization nature, has solved because of building basic condition restriction and can't set up pressure drainage system's problem at the basement, can prevent that the drainage from flowing backward. Compared with the traditional civil construction water collecting pit, the method does not need to carry out design and construction treatments such as local reinforcement, pump pit avoiding house structure foundation and the like, and the civil construction cost can be reduced by 80%. The maintenance cover on the pump pit is not required to be opened by professional property support personnel for maintenance at regular intervals, the service life can be prolonged along with the use period of the project, and the expenses of long-term operation maintenance personnel and equipment are greatly reduced. The utility model discloses a drainage non return system's overhaul of equipments cost is less, does not need the upper reaches drainage of long-time shutdown system.

The utility model discloses in, can also make up each other between the above-mentioned each technical scheme to realize more preferred combination scheme. Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.

Drawings

The drawings are only for purposes of illustrating particular embodiments and are not to be construed as limiting the invention, wherein like reference numerals are used to designate like parts throughout the drawings.

FIG. 1 is a schematic structural view of a check valve body according to the present invention;

FIG. 2 is a schematic structural view of the check valve plate with triangular counterweight protrusions of the present invention;

FIG. 3 is a schematic structural view of a sealing gasket between a check valve plate and a valve body according to the present invention;

FIG. 4 is a front view of the check valve of the present invention with triangular weighted protrusions;

FIG. 5 is a side view of the check valve of the present invention with triangular weighted protrusions;

FIG. 6 is a schematic view of the closed and open state of the check valve with triangular counterweight protrusions of the present invention;

FIG. 7 is a side view of the check valve with a drop shaped valve plate of the present invention;

FIG. 8 is a schematic view of the closed and open states of the check valve with a drop-shaped valve plate according to the present invention;

FIG. 9 is a side view of the check valve with a concave valve plate of the present invention;

FIG. 10 is a schematic view of the closed and open states of the check valve with a concave valve plate according to the present invention;

FIG. 11 is a side view of the two-stage segmented check valve of the present invention;

FIG. 12 is a schematic view of the two-stage segmented check valve of the present invention in closed and open positions;

FIG. 13 is a schematic view of the two-stage segmented check valve of the present invention in an open state under motor control;

FIG. 14 is a side view of the four-stage segmented check valve of the present invention;

FIG. 15 is a schematic view of the closed and open states of the four-stage segmented check valve of the present invention;

FIG. 16 is a schematic view of the four-stage segmented check valve of the present invention in an open state under motor control;

FIG. 17 is a front view of the vertical split drain check valve of the present invention;

FIG. 18 is a side view of the vertical split drain check valve of the present invention;

FIG. 19 is a schematic view of the longitudinally split discharge check valve in its closed and open positions in accordance with the present invention;

FIG. 20 is a view showing the open state of the vertical split type check valve under the control of the motor according to the present invention;

FIG. 21 is a schematic view of the structure of the outer tube of the check valve of the present invention;

FIG. 22 is a top view of the outer tube cover of the check valve of the present invention;

FIG. 23 is a schematic structural view of the outer tube cover of the check valve and the mating sealing member of the present invention;

FIG. 24 is a diagram showing the position relationship between the check valve well and the outer check valve tube according to the present invention;

fig. 25 is a first schematic structural view of the drainage check system of the present invention;

fig. 26 is a second schematic structural view of the drainage non-return system of the present invention;

fig. 27 is a third schematic structural view of the drainage check system of the present invention;

fig. 28 is a fourth schematic structural view of the drainage non-return system of the present invention.

Reference numerals:

101. a check valve; 1. a valve body; 2. a valve plate; 2-1, a first side edge; 2-2, a second side edge; 2-3, an intermediate rotating shaft; 2-4, a main driving valve plate; 3. sealing gaskets; 4. a manual connecting rod; 5. an outer check valve tube; 6. an outer tube cover; 6-1, a submersible sewage pump mounting port; 6-2, a pressure water outlet; 6-3, an observation window; 6-4, a first sensor mounting port; 6-5, a second sensor mounting port; 6-6, a valve body mounting opening; 7. a well wall; 8. a cover plate; 9. a submersible sewage pump; 10. a control system; 11. a blow-off pipe; 12. a first sensor; 13. a second sensor.

Detailed Description

The following detailed description of the preferred embodiments of the invention, which is to be read in connection with the accompanying drawings, forms a part of this application, and together with the embodiments of the invention, serve to explain the principles of the invention and not to limit its scope.

Example 1

An embodiment of the utility model discloses a gravity type drainage check valve, as shown in fig. 1 to 3, including valve body 1 and valve block 2, valve block 2 rotates with valve body 1 to be connected, and valve body 1 is connected through the pivot with valve block 2, perhaps, and valve body 1 is connected through ring lock buckle connecting piece with valve block 2.

In this embodiment, the valve plate 2 is provided with a counterweight protrusion, and the counterweight protrusion is arranged to enable the center of gravity of the valve plate 2 to be arranged at the lower middle part of the whole valve plate 2. The counterweight protrusion comprises a triangular counterweight protrusion and an arc counterweight protrusion, the counterweight protrusion and the valve plate 2 are integrally formed or can be detachably and fixedly connected, and the counterweight protrusion is arranged on two side surfaces of the valve plate 2 or only arranged on a single side surface.

This embodiment, set up bellied gravity type drainage check valve of triangle-shaped counter weight, as shown in fig. 4-6, the protruding upstream surface and/or the surface of a poor water of locating valve block 2 of triangle-shaped counter weight, form the counter weight with the material, guarantee that the focus of valve block 2 is located the holistic 1/2-holistic lower part 2/3 department of valve block 2, the protruding symmetry of triangle-shaped counter weight sets up in the both sides of valve block 2 or only locates one side of valve block 2, check valve 101 relies on self action of gravity to hang down naturally for the normally closed state, valve block 2 normally closed at ordinary times, laminate in check valve 101 valve body.

Further, the longitudinal section of the triangular counterweight protrusion has a first side edge 2-1 and a second side edge 2-2, the angle formed by the first side edge 2-1 and the second side edge 2-2 is an obtuse angle, the length of the first side edge 2-1 is greater than that of the second side edge 2-2, and preferably, the length of the first side edge 2-1 is equal to 1.3-1.6 times that of the second long side edge 2-2.

Because the gravity drainage pipe generally has a certain gradient, in order to ensure the sealing effect when the system is used in a pipe section with a certain gradient and ensure the sealing when the valve plate 2 naturally sags due to gravity, the symmetrical center line of the valve plate 2 and the vertical direction have an inclination angle of 10-25 degrees, and the inclination angle of 15 degrees is preferred. Furthermore, in a natural state, the included angle between the first side edge 2-1 of the section of the valve plate 2 and a vertical plane is 0-2 degrees, and the included angle between the second side edge 2-2 and a horizontal plane is 30-45 degrees. When water is drained from the upstream, the check valve 101 is pushed to open by water flow, and the water flow gravity flows to the downstream for drainage. When the water flow is insufficient or terminated, the valve plate 2 is reset and closed by utilizing the self gravity.

This embodiment, set up bellied gravity type drainage check valve of arc counter weight, as shown in fig. 7-8, the upstream surface and/or the surface of a poor water of valve block 2 are located to the arch of arc counter weight, valve block 2 is the water droplet shape structure of weight under light, guarantee that the focus of valve block 2 is located the holistic 1/2 of valve block 2-holistic lower part 2/3 department, the protruding symmetry of arc counter weight sets up in the both sides of valve block 2 or only locates one side of valve block 2, check valve 101 relies on self action of gravity to hang down naturally for the normally closed state, valve block 2 normally closed at ordinary times, laminate in check valve 101 valve body 1.

Compared with the prior art, the gravity type drainage check valve of this embodiment, moreover, the steam generator is simple in structure, low in cost, through setting up the lower part in the protruding focus of arranging the valve block of counter weight, the valve block of this structure can great counter weight, valve block and check valve outer tube inner wall in close contact with, do not open when flow is less, only can dash when flow is great, because the lower part weight of valve block is big, sealing performance is good, the effect of preventing sewage backward flow is better, can also prevent foul smell, the insect pest gets into indoorly through the space between valve block and the check valve outer tube inner wall, the leakproofness of check valve has been improved greatly. The gravity drainage check valve of this embodiment, simple structure, it is with low costs, can wide application in basement gravity drainage system, effectively prevent drainage backward flow, work safe and reliable.

Example 2

An embodiment of the utility model discloses a spill drainage check valve, as shown in fig. 9 to fig. 10, including valve body 1 and valve block 2, valve block 2 rotates with valve body 1 to be connected, and valve body 1 is connected through the pivot with valve block 2, perhaps, and valve body 1 passes through ring hasp connecting piece with valve block 2 to be connected. The center of gravity of the valve sheet 2 is disposed at the lower middle part of the valve sheet 2 as a whole.

Wherein, the upstream surface and/or the surface of a poor water of valve block 2 are the concave curved surface, and the ineffective loss of rivers when can reduce impact valve block, the concave curved surface can increase the lifting surface area of valve block 2.

When the water flow impacts the water-facing surface of the valve plate 2, the concave curved surface can enhance the effect of opening the valve plate, and the valve plate is convenient to open; when sewage flows backwards, the backflow water impacts the back water surface of the valve plate 2, the concave curved surface can enhance the effect of closing the valve plate, and the valve plate is convenient to close. The non-return operating stability of check valve can be showing to the structural setting of concave curved surface.

In a preferred embodiment of this embodiment, valve plate 2 and valve body 1 all adopt the metal material to make, in order to improve the leakproofness of valve body 1, set up solenoid on the valve body 1, the material of valve body 1 inner core is soft iron, produces magnetic attraction to valve plate 2 after the outside circular telegram of coil. When the signal of second sensor 13 detected low reaches water harmony and the water had great undulant, for avoiding that check valve 101 valve body 1 leads to sealed not tight opening because of undulant and upstream drainage, with signal transmission to controller this moment, the circular telegram of controller control valve body 1, valve block 2 is inhaled to valve body 1 to guarantee sealing performance.

In a preferred embodiment of this embodiment, a plurality of dotted permanent magnet magnets are disposed at the positions where the valve body 1 and the valve plate 2 are attached to each other, so as to improve the sealing effect. It should be noted that the number and the arrangement position of the permanent magnet magnets ensure that the suction force is smaller than the impulsive force of the upstream drainage instantaneous half pipe flow on the valve plate 2, otherwise, the smooth drainage of the water flow is difficult to ensure at ordinary times.

A preferred embodiment of this embodiment, spill drainage check valve are electronic check valve, and opening and closing of valve block 2 passes through motor control, and is concrete, and spill drainage check valve still includes the motor, and the motor sets firmly on outer tube of valve lid 6, and the output shaft of motor passes through the connecting piece to be connected with valve block 2, opens or closes through motor drive valve block 2, and the controller keeps the normally closed or the normally open state of valve body 1 according to the liquid level signal of monitoring subassembly transmission.

In a preferred embodiment of this embodiment, the upper end of the valve plate 2 is fixedly provided with a manual connecting rod 4, which is used during manual swing, and the manual connecting rod 4 is rotated, so that the manual connecting rod 4 can drive the valve plate 2 to rotate.

In order to prevent gas, insect pests and the like from entering an upstream drain pipe through the outer valve body, the valve body 1 and the valve plate 2 are sealed through the sealing gasket 3, the valve body 1 is provided with a groove for installing the sealing gasket 3, and the sealing gasket 3 is arranged in the groove of the valve body 1. Preferably, the sealing gasket 3 is a rubber sealing ring.

In order to prolong the service life of the check valve, the valve body 1, the valve block 2 and the manual connecting rod 4 are made of metals such as copper and cast iron which are subjected to corrosion prevention treatment, and pipelines such as the check valve outer pipe 5, the well wall cover plate 8 and the drain pipe are made of materials such as various plastics such as PVC and HDPE.

In this embodiment, a sealing washer is arranged below the outer tube cover 6 to ensure that the outer tube cover of the check valve does not overflow due to water filling when the manual connecting rod 4 above the valve plate 2 moves freely. The submersible sewage pump 9 is similar in structure, and after a sealing washer is arranged between the sewage blocking port and the outer pipe cover 6, the main body of the submersible sewage pump 9 is connected with the sewage blocking port. The monitoring assembly is connected with the mounting port of the monitoring assembly in a sealing way through a sealing gasket.

Compared with the prior art, the spill drainage check valve that this embodiment provided, through the upstream surface and/or the surface of a water back with the valve block be the spill curved surface, the ineffective loss of rivers when can reduce impact valve block, the atress area of valve block can be increased to the spill curved surface, and the non return job stabilization nature of check valve can be showing to the structure setting of spill curved surface. When the water flow impacts the water surface of the valve plate, the concave curved surface can enhance the effect of opening the valve plate, and the valve plate is convenient to open; when sewage flows backwards, the backflow water impacts the back water surface of the valve plate, the concave curved surface can enhance the effect of closing the valve plate, and the valve plate is convenient to close. The concave drainage check valve of the embodiment has the advantages of simple structure and low cost, can be widely applied to a gravity drainage system of a basement, effectively prevents drainage from flowing backwards, and is safe and reliable to work

Example 3

The utility model discloses a further embodiment discloses a multistage sectional type drainage check valve, as shown in fig. 11 to 16, including valve body 1 and valve block 2, valve block 2 rotates with valve body 1 to be connected, and valve body 1 is connected through the pivot with valve block 2, and perhaps, valve body 1 is connected through ring lock buckle connecting piece with valve block 2.

In this embodiment, the valve plate 2 is formed by rotatably connecting a plurality of valve plate segments, and at least includes two valve plate segments.

In a preferred embodiment of this embodiment, the valve plate 2 of the multi-stage sectional type water discharge check valve is a transverse half-open type valve plate, as shown in fig. 11 to 13, the valve plate 2 includes two valve plate sections connected by a rotating shaft, the rotating shaft is disposed at 1/2 or a lower portion 1/4 of the valve plate 2, the valve plate section is obliquely cut down at a seam on an upstream side, an included angle between a joint surface of the two valve plate sections and a center line of the valve plate 2 is 45 °, wherein the center line of the valve plate is located in the valve plate body and is parallel to a surface of the valve plate in a natural closed state.

Further, the areas of the two valve plate segments are equal, or the area of the lower valve plate segment is smaller than that of the upper valve plate segment, preferably, the area of the lower valve plate segment is equal to 1/2-4/5 of the area of the upper valve plate segment.

In a preferred embodiment of this embodiment, the valve sheet 2 of the multi-stage sectional type water discharge check valve is a transverse multi-fold valve sheet, as shown in fig. 14 to 16, the valve sheet 2 includes 4 valve sheet sections, the valve sheet sections are obliquely cut into seams toward the upstream side and downward, an included angle between a joint surface of two adjacent valve sheet sections and a center line of the valve sheet 2 is 45 °, the two adjacent valve sheet sections are connected by a rotating shaft, the center line of the rotating shaft is perpendicular to the water flow direction, an end surface of the rotating shaft connected with the valve sheet sections is an inclined surface, the rotating shaft is disposed on the back water surface side of the valve sheet, and the valve sheet sections can rotate around the upper end rotating shaft thereof to open toward the downstream direction under. As the water flow increases gradually, the check valve flap opens segment by segment from the bottom. When the water level is reduced as the water flow is reduced, the valve plate sections are reset from bottom to top in sequence, the interface surfaces of the two adjacent valve plate sections from top to bottom are attached in sequence until the interface surfaces of the two adjacent valve plate sections at the bottom are attached, all the valve plate sections are reset, and the reset state is formed. Fig. 15 is a schematic diagram of a check valve closing state, a sectional opening state diagram of the lowest valve plate when the flow rate is small, and a sectional opening state diagram of a plurality of valve plates when the flow rate is large, from left to right.

Considering that when the sewage flow is large, the check valve with the transverse multi-fold structure sequentially opens the valve plates and cannot meet the requirement of rapid sewage discharge, therefore, in order to better control the opening and closing states of the check valve, the check valve with the structure is also provided with a motor, an output shaft of the motor is connected with the uppermost valve plate of the valve plates 2 in a segmented manner through a connecting piece, the uppermost valve plate is a main driving valve plate 2-4, the main driving valve plate 2-4 is driven by the motor to swing along the sewage flow direction, and the valve plates on the lower side are driven by the main driving valve plate 2-4 to be opened in a segmented manner. When the highest swing position is reached, the included angle between the central line of the valve plate 2 and the vertical direction is 60 degrees. When the water discharge is small, the valve plates can be opened sequentially by sections under the natural impact of water flow, and the water discharge requirement can be met; when the drainage quantity is increased, the sequential opening degree of the valve plate sections cannot meet the requirement of quick sewage discharge, a motor is started, the motor drives the main driving valve plate 2-4 to swing along the sewage discharge flow direction, so that the valve plate section below is driven to open towards the water flow direction, and a schematic diagram of the state that the motor drives the main driving valve plate 2-4 to swing along the sewage discharge flow direction and to be completely opened is shown in FIG. 16; when the water flow is small, the motor drives the valve plate to swing back, so that the opening angle of the valve plate 2 is reduced, and the requirement of draining is met; or when the water flow is reduced, the motor is directly closed, each valve plate segment swings back and resets under the self gravity, and mechanical drainage is performed by the self gravity to prevent water from returning.

In order to improve the sealing performance, the interface surfaces of two adjacent valve plate sections are provided with sealing gaskets, and when the interface surfaces of two adjacent valve plate sections are sequentially attached, the sealing gaskets seal the interface surfaces.

Compared with the prior art, the multistage sectional type drainage check valve that this embodiment provided rotates connection structure through setting up the valve block into the multistage, adaptable not equidimension rivers. The multistage sectional type check valve of this embodiment, simple structure, it is with low costs, can wide application in basement gravity drainage system, effectively prevent drainage backward flow, work safe and reliable.

Example 4

The utility model discloses a still another embodiment discloses a vertical split drainage check valve, as shown in FIG. 17 to FIG. 20, including valve body 1 and valve block 2, valve block 2 rotates with valve body 1 to be connected, and valve body 1 is connected through the pivot with valve block 2, perhaps, valve body 1 is connected through ring lock buckle connecting piece with valve block 2.

In this embodiment, the valve plate 2 is a longitudinally split valve plate, and is similar to a water butterfly valve in structure, specifically, the valve plate includes a left valve plate, a right valve plate, and a middle rotating shaft 2-3, the middle rotating shaft 2-3 is disposed in the middle of the valve plate 2, and the left valve plate and the right valve plate can rotate around the middle rotating shaft 2-3, so as to open and close the check valve.

In a natural state, the middle rotating shaft 2-3 sags, the axis of the middle rotating shaft 2-3 forms an included angle of 10-25 degrees, preferably 15 degrees with the vertical direction, the left valve plate and the right valve plate can be opened in the downstream direction under the action of sewage impact, when the sewage impact acting force is smaller than the power for resetting the left valve plate and the right valve plate, the left valve plate and the right valve plate are reset, the check valve is closed, and fig. 19 shows a schematic diagram of the closed state of the check valve and a schematic diagram of the open state of the left valve plate and the right valve plate.

In this embodiment, the middle rotating shaft 2-3 is provided with a limiting part for limiting the rotating angle of the left valve plate and the right valve plate, the left valve plate, the right valve plate and the middle rotating shaft 2-3 are in the same plane in a natural state, the left valve plate and the right valve plate can only be opened towards the downstream direction at the original positions under the effect of sewage impact, and when the left valve plate and the right valve plate are reset, the rotation is stopped at the limiting part.

Furthermore, a counterweight structure is arranged at the periphery of the valve plate 2, the counterweight structure is a concave structure, concave curved surfaces are arranged at the peripheries of the upstream surface and/or the downstream surface of the valve plate 2, the radian of the curved surfaces at the peripheries of the lower parts of the left valve plate and the right valve plate is larger than that of the curved surfaces at the peripheries of the upper parts of the left valve plate and the right valve plate, and the structure is favorable for opening or closing the check valve.

Considering that when the sewage flow is large, the longitudinal split check valve only depends on the opening degree of the left valve sheet and the right valve sheet, and cannot meet the requirement of rapid sewage discharge. Therefore, in order to better control the opening and closing state of the check valve and realize quick drainage, the check valve is also provided with a motor, an output shaft of the motor is connected with the middle rotating shaft 2-3 of the valve plate 2 through a connecting piece, the middle rotating shaft 2-3 is driven to swing along the flow direction of sewage through the motor, and when the highest swinging position is reached, the included angle between the middle rotating shaft 2-3 and the vertical direction is 60 degrees. When the water discharge is small, the opening state of the left valve plate and the right valve plate under the natural impact of water flow can meet the water discharge requirement; when the water discharge is increased and the rapid sewage discharge cannot be met only by the opening degree of the left valve plate and the right valve plate, the motor is started, the motor drives the middle rotating shaft 2-3 of the valve plate to swing along the sewage discharge flow direction, so that the left valve plate and the right valve plate are driven to open towards the water flow direction, and a check valve complete opening state diagram with the swing angle of the middle rotating shaft of the motor control valve plate of 60 degrees is shown in a diagram 20; when the water flow is small, the motor is turned off, and the valve plate swings back and resets under the self gravity.

In order to improve the operational reliability of the check valve, the longitudinal split drainage check valve further comprises a reset assembly, such as a spring assembly or a rubber rope assembly, the reset assembly is used for the left valve plate and the right valve plate to rotate and reset, and the left valve plate and the right valve plate reset to an initial closing state through the reset assembly.

Compared with the prior art, the longitudinal split drainage check valve provided by the embodiment has the advantages that the valve plates 2 are arranged into the left valve plate and the right valve plate which are connected through the middle rotating shaft 2-3, the left valve plate and the right valve plate can rotate around the middle rotating shaft 2-3, the opening and closing of the check valve are realized, the check valve with the structure is simple in structure and low in cost, can be widely applied to a basement gravity drainage system, effectively prevents drainage from flowing backwards, and is safe and reliable to work

Example 5

In yet another embodiment of the present invention, a drainage check system is disclosed, as shown in fig. 24 to 28, the drainage check system comprising a check valve 101, a check valve outer tube 5 and an outer tube cap 6; among them, the check valve 101 is a gravity type drain check valve disclosed in embodiment 1, a concave type drain check valve disclosed in embodiment 2, a multistage sectional type drain check valve disclosed in embodiment 3, or a longitudinally split type drain check valve disclosed in embodiment 4. The check valve 101 is arranged in the check valve outer pipe 5 and divides the check valve outer pipe 5 into an upstream cavity and a downstream cavity, the check valve 101 can be opened under the control of the impact of upstream water flow or external force to enable the upstream cavity to be communicated with the downstream cavity, and the check valve 101 can be closed under the control of self gravity or external force to enable the upstream cavity to be hermetically separated from the downstream cavity; the outer tube cover 6 is detachably arranged on the check valve outer tube 5, and the outer tube cover 6 is opened to overhaul or replace the check valve 101.

In this embodiment, the check valve outer tube 5 serves as a carrier for the check valve 101 and related components, and the check valve 101 divides the space inside the check valve outer tube 5 into two chambers, i.e., an upstream chamber before the check valve 101 and a downstream chamber after the check valve 101. The check valve outer pipe 5 is provided with a detachable outer pipe cover 6 which is opened when the check valve 101 is overhauled and replaced.

In this embodiment, as shown in fig. 21 to 23, a valve body mounting opening 6-6 is formed in the outer tube cover 6, the valve body 1 is mounted at the valve body mounting opening 6-6 of the outer tube cover 6 through a rotating assembly, and the valve plate 2 of the check valve 101 is assembled with the valve body 1 and then disposed in the check valve outer tube 5; when the downstream backwater, the outer ring of the valve body 1 props against the valve plate to ensure the sealing property. An observation window 6-3 is arranged at the position, close to the rotating shaft of the check valve 101, of the outer tube cover 6, the observation window 6-3 is located above the downstream cavity, furthermore, the observation window 6-3 is made of transparent materials such as plastics, the observation window 6-3 is a circular observation hole with the diameter of 50mm, and an observation hole made of transparent plastics is arranged, so that whether the downstream of the check valve 101 is in a water state or not can be conveniently observed.

For the improvement get into the velocity of flow of check valve 101 preceding, the rear portion, the cavity pipe wall reducing of check valve 101 upper reaches cavity sets up, and the cavity pipe wall of upper reaches cavity includes anterior segment and back end, and the anterior segment is connected with the back end reducing, and the pipe diameter of back end is greater than the pipe diameter of anterior segment and the pipe diameter of back end equals low reaches cavity pipe diameter. The anterior segment of check valve outer tube 5 is connected with the egress opening of drain pipe, also inserts the drainage main pipe for the anterior segment of check valve outer tube 5, and the anterior segment pipe diameter of check valve outer tube 5 is the same with the pipe diameter of the drain pipe that inserts, and anterior segment pipe diameter size is D, and the back end pipe diameter equals 5 low reaches cavity pipe diameters of check valve outer tube, and is not less than 1.2D. In order to ensure the connection of the main pipe, the diameter-changing position is arranged behind the longitudinal D size of the upstream interface of the outer pipe.

In this embodiment, the top of check valve outer tube 5 sets up valve well wall of a well 7 and well lid, opens when being convenient for later stage fortune dimension maintenance.

In this embodiment, a submersible sewage pump 9 and a motor are provided in the valve well above the check valve outer pipe 5, and the outside is connected with a water pump control device. The submersible sewage pump 9 is arranged at the upstream position of the check valve 101, the water suction port of the submersible sewage pump 9 is arranged in the upstream cavity of the outer pipe 5 of the check valve, and the sewage blocking port is arranged outside. The pump body and the motor of the submersible sewage pump 9 are arranged in the well chamber of the check valve well. The outer pipe cover 6 is provided with a submersible sewage pump mounting port 6-1, the submersible sewage pump mounting port 6-1 is positioned above the upstream cavity of the check valve outer pipe 5, and the submersible sewage pump 9 is mounted at the submersible sewage pump mounting port 6-1; when the rainfall in the outdoor is possible to block water, in order to ensure the water discharge safety, when the device is used in the upstream and then the water is discharged to the system, whether the downstream of the system is in the water blocking state is judged by observing the state of the check valve 101 and the observation window 6-3, if the water blocking state is really existed, the user starts the water pump control device, and the submersible sewage pump 9 is started to discharge the sewage to the pressure water outlet 6-2 in the downstream of the system through the sewage discharge pipe 11 or directly discharge the sewage to the downstream through a separately laid pipeline.

In this embodiment, drainage non return system still is equipped with monitoring subassembly, control system 10, monitoring subassembly and control system 10 pass through wire or wireless connection, monitoring subassembly is used for monitoring whether have water and water level information in the cavity of check valve outer tube 5 to can be with whether have water and water level information conveying to control system 10 in the cavity of check valve outer tube 5, control system 10 includes controller and alarm device, the controller can be according to the information control sewage pump start-up or the closing of detection module conveying, and control alarm device reports to the police. Monitoring components are arranged at the upstream of the check valve 101 and the downstream of the submersible sewage pump 9, and the two monitoring components are respectively used for monitoring whether water and water level information exist in the upstream cavity and the downstream cavity of the check valve outer pipe 5. Further, the monitoring component is a sensor, a monitoring component mounting port is arranged on the outer pipe cover 6, and the monitoring component mounting port comprises a first sensor mounting port 6-4 located at the upstream and a second sensor mounting port 6-5 located at the downstream. The upstream monitoring component is a first sensor 12, the downstream monitoring component is a second sensor 13, and the first sensor 12 and the second sensor 13 are both light sensors or pressure sensors.

The drainage check system of the embodiment is adopted for drainage, and comprises the following steps:

the method comprises the following steps: the check valve outer pipe 5 is connected into an upstream pipeline, and the check valve 101 is installed in the check valve outer pipe 5;

step two: the monitoring assembly is installed and connected to the control system 10. A first sensor 12 and a second sensor 13 are respectively arranged at the upstream of the check valve 101 and the downstream of the submersible sewage pump 9, and the first sensor 12 and the second sensor 13 are connected with a controller and an alarm device through leads.

Step three: and starting the monitoring assembly and the control system 10, and draining by the drainage check system. In the drainage process, the working logic relationship among the first sensor 12, the second sensor 13, the controller and the alarm device is as follows:

(1) when the second sensor 13 monitors that water exists in the downstream, a signal is reported to prompt the water blocking in the downstream, the controller only displays the water blocking in the downstream, the alarm is not given, and the submersible sewage pump 9 is not started.

(2) When the first sensor 12 monitors that water exists at the upstream, a signal is reported to prompt the upstream to drain, the controller only displays, does not alarm and does not start the submersible sewage pump 9.

(3) When the second sensor 13 continuously reports that water exists in the downstream and the first sensor 12 does not have a signal for a long time, the downstream water blocking is indicated and no water is drained in the upstream. In this case, if the first sensor 12 detects a change in signal, it will verify that the upstream discharge is taking place and will start the submersible sewage pump 9 to discharge. The submersible sewage pump 9 pressurizes and discharges the appliance drainage water to a pressure drainage port 6-2 at the downstream of the system through a drainage pipe 11, or directly discharges the appliance drainage water to a downstream drainage pipe through a separately laid pipeline.

(4) If the first sensor 12 continuously reports that water is discharged from the upstream of the signal for a long time, the second sensor 13 does not need to be judged, the direct alarm prompts that problems such as upstream appliance damage and the like possibly happen, and the submersible sewage pump 9 is not started.

Compared with the prior art, the drainage non-return system provided by the embodiment can block downstream water blocking in the basement drainage pipe which is possibly caused to flow backwards by arranging the non-return valve and related components, and can smoothly discharge the instrument drainage of the basement and the like by additionally arranging the small submersible sewage pump 9 without arranging a civil sump. On the basis of the principle, the alarm of downstream water blocking and the automatic pump starting are realized and the alarm of accident conditions is realized by arranging the sensor, the controller and the alarm device. When only a check valve and other pure mechanical components are arranged, the check valve can be used for the effects of draining water, preventing insects, preventing odor, ensuring that a water seal is not damaged and the like of devices such as a hand basin and the like. When the small submersible sewage pump 9 is arranged, the drainage check system can be arranged on a basement drainage main pipe 24, a branch pipe of the last drainage appliance is connected into the basement drainage main pipe and then arranged at a position before the basement drainage main pipe is connected out of the basement drainage main pipe, and the pump is started after the appliances are drained through artificially controlling the water pump. When the sensor, the controller and the alarm device are additionally arranged, the automatic control and the alarm prompt of the device can be realized. The drainage non-return system of the embodiment is adopted for drainage, so that the problem that a pressure drainage system cannot be arranged in a basement due to the limitation of building foundation conditions is solved; the basement drainage solution is provided when the basement needs to be prevented from flowing backwards under the conditions of normal gravity drainage and rain flood; the problems of rat and insect prevention of the drainage system after the sanitary ware and damage of the gas gushing water seal caused by water vapor fluctuation are solved.

Compared with the traditional civil sump pit, the civil sump pit can reduce the civil cost by 80 percent without the design and construction treatment of local reinforcement, pump pit avoiding house structure foundation and the like; the initial investment of the electromechanical equipment can be reduced by more than 60%, the installation is convenient and fast in construction period, and the construction period can be effectively shortened by more than 50%; in daily operation maintenance, the utility model discloses non return system does not need professional property evidence-holding personnel to regularly open the access cover on the pump pit and overhauls, consequently, can increase along with the cycle of project use, reduces long-term operation maintainer, equipment cost expenditure by a wide margin. And in case when the trouble, compare traditional sump pit mode, the equipment maintenance cost of the drainage non return system of this embodiment is less, does not need the upstream drainage of long-time stop system. Compared with the traditional civil pump pit, the maintenance and replacement operation of pulling up the submersible sewage pump by sticking a wall track can shorten the time by more than 50 percent.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention.

Claims (10)

1. A drain check system comprising a check outer tube (5), an outer tube cap (6) and a female drain check;

the concave drainage check valve is arranged in the check valve outer pipe (5) and divides the check valve outer pipe (5) into an upstream cavity and a downstream cavity, the concave drainage check valve can be opened under the control of the impact or external force of upstream water flow to communicate the upstream cavity with the downstream cavity, and the concave drainage check valve can be closed under the control of self gravity or external force to hermetically separate the upstream cavity from the downstream cavity;

the outer tube cover (6) is detachably arranged on the outer tube (5) of the check valve, a valve body mounting opening (6-6) is formed in the outer tube cover (6), and the valve body (1) is mounted on the valve body mounting opening (6-6) of the outer tube cover (6) through a rotating assembly;

an observation window (6-3) is arranged at the position, close to the rotating shaft of the concave drainage check valve, of the outer pipe cover (6), and the observation window (6-3) is located above the downstream cavity.

2. The drain check system according to claim 1, characterized in that the female drain check comprises a valve body (1) and a valve plate (2), the valve plate (2) being rotatably connected to the valve body (1);

the upstream surface and/or the downstream surface of the valve plate (2) are/is a concave curved surface.

3. A drainage check system according to claim 2, characterized in that the centre of gravity of the valve plate (2) is located in the lower middle part of the valve plate (2).

4. The drainage check system of claim 2, wherein the valve body (1) is provided with an electromagnetic coil, the inner core of the valve body (1) is made of soft iron, and the electromagnetic coil is used for generating magnetic attraction force on the valve plate (2) after being electrified.

5. The drainage check system of claim 2, wherein a plurality of point-like permanent magnet magnets are arranged at the attaching positions of the valve body (1) and the valve plate (2).

6. The drainage check system of claim 2, characterized in that the concave drainage check valve further comprises a motor, an output shaft of the motor is connected with the valve plate (2), and the valve plate (2) is driven to open or close by the motor.

7. A drainage check system according to claim 2, characterized in that a manual connecting rod (4) is fixed on the upper end of the valve plate (2).

8. A drainage check system according to claim 2, characterized in that the valve body (1) and the valve plate (2) are sealed by a sealing gasket (3).

9. A drainage check system according to claim 2, characterized in that the valve body (1) is provided with a groove for mounting the sealing gasket (3), the sealing gasket (3) being arranged in the groove of the valve body (1).

10. A discharge stop system according to any of claims 2 to 9, wherein the valve plate (2) naturally hangs down under gravity to a closed position, the centre line of symmetry of the valve plate (2) being at an angle of between 10 ° and 25 ° to the vertical.

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