CN111677062B

CN111677062B - Building drainage system

Info

Publication number: CN111677062B
Application number: CN202010554396.XA
Authority: CN
Inventors: 赵锂; 霍新霖; 李茂林; 赵德天; 梁岩
Original assignee: China Architecture Design and Research Group Co Ltd
Current assignee: China Architecture Design and Research Group Co Ltd
Priority date: 2020-06-17
Filing date: 2020-06-17
Publication date: 2021-09-14
Anticipated expiration: 2040-06-17
Also published as: CN111677062A

Abstract

The invention relates to a building drainage system, belongs to the technical field of building water supply and drainage, and solves the problem that the existing gravity drainage system cannot prevent backward flow when being applied to basement drainage of a building system. The building drainage system comprises a drainage non-return system, and the drainage non-return system is arranged on the basement drainage main pipe; the underground water pipe also comprises a vertical pipe, a ground branch pipe, a basement branch pipe and a basement drainage main pipe; the ground branch pipe is arranged in each floor above the ground, the basement branch pipe and the basement drainage main pipe are arranged in the basement, and the ground branch pipe and the basement branch pipe are both connected with the drainage device on the floor; the ground branch pipe and the basement branch pipe are communicated with the vertical pipe, after all the branch pipes are connected into the vertical pipe, the water outlet of the vertical pipe is connected with the water inlet of the basement drainage main pipe, and the water outlet of the basement drainage main pipe is connected with the drainage non-return system. The invention is suitable for the condition that the lowest drainage point of the basement is higher than the height of the drainage pipe network in the garden, and can effectively prevent drainage from flowing backwards.

Description

Building drainage system

Technical Field

The invention relates to the technical field of building water supply and drainage, in particular to a building drainage 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.

Therefore, it is urgently needed to provide a building drainage system capable of preventing backflow.

Disclosure of Invention

In view of the foregoing, the present invention is directed to a building drainage system, which is used to solve the problem that the existing gravity drainage system cannot prevent backflow when being applied to drainage in a basement of a building system.

The purpose of the invention is mainly realized by the following technical scheme:

a building drainage system comprises a drainage non-return system, wherein the drainage non-return system is arranged on a basement drainage main pipe.

Furthermore, the building drainage system also comprises a vertical pipe, a ground branch pipe, a basement branch pipe and a basement drainage main pipe; the ground branch pipe is arranged in each floor above the ground, the basement branch pipe and the basement drainage main pipe are arranged in the basement, and the ground branch pipe and the basement branch pipe are both connected with the drainage device on the floor; the ground branch pipe and the basement branch pipe are communicated with the vertical pipe, after all the branch pipes are connected into the vertical pipe, the water outlet of the vertical pipe is connected with the water inlet of the basement drainage main pipe, and the water outlet of the basement drainage main pipe is connected with the drainage non-return system.

Further, the stand pipe is disposed at a safe distance downstream of the drain check system.

Further, the safety distance is greater than 1.5 m.

Furthermore, a submersible sewage pump is arranged in the valve well above the outer pipe of the check valve.

Further, the head of the submersible sewage pump is larger than the distance H from the downstream pipeline to the ground level at the inspection well interface level.

Furthermore, the drainage of the water using appliance at the bottommost layer is connected to the transverse trunk pipe and is not less than 600mm away from the position of the vertical pipe.

Further, the height of the bottom of the pipe at the position, connected into the inspection well, of the lower stream of the non-return drainage system is at least 300mm higher than the bottom elevation of the inspection well.

Further, the drain check system includes a check valve and a check valve outer tube; the 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 check valve can be opened under the control of the impact of upstream water flow or external force to communicate the upstream cavity with the downstream cavity, and the check valve can be closed under the control of self gravity or external force to hermetically separate the upstream cavity from the downstream cavity.

Further, the submersible sewage pump discharges water blocking to a downstream interface of the drainage non-return system through a pipeline; alternatively, the submersible sewage pump discharges the water block directly into the nearest manhole through a separately laid pipeline.

Compared with the prior art, the invention has at least one of the following beneficial effects:

a) the building drainage system provided by the invention is suitable for the condition that the lowest drainage point of the basement is higher than the height of a garden drainage pipe network, and the overground and underground drainage is arranged in one system without independently arranging a water collecting pit for the underground drainage.

b) According to the building drainage system provided by the invention, the check valve is arranged on the basement drainage pipe, so that the basement can be provided with the gravity drainage system, and the backward flow can be effectively prevented. Through setting up small-size drain pump to when guaranteeing that the harmony water takes place in low reaches, indoor can continue the drainage, under the condition of basement non-fire control drainage demands such as messenger's part house, villa, need not set up the sump pit and the supporting stealthily dirty pump of civil engineering, effectively reduce the civil engineering requirement of basement drainage and the professional demand of daily operation maintenance.

c) Compared with the traditional civil construction water collecting pit, the building drainage system provided by the invention does not need to carry out design and construction treatment such as local reinforcement, pump pit avoiding house structure foundation and the like, and the civil construction cost can be reduced by 80%; 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 and maintenance, the building drainage system does not need professional property support personnel to regularly open the access cover on the pump pit for maintenance, so that the service life of the building drainage system can be prolonged along with the use period of a project, and the expenses of long-term operation and maintenance personnel and equipment are greatly reduced. And once the system fails, compared with the traditional sump mode, the method has the advantages that the equipment maintenance cost is low, and the upstream drainage of the system does not need to be stopped for a long time. 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.

In the invention, the technical schemes can be combined with each other to realize more preferable combination schemes. 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.

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

FIG. 2 is a schematic structural view of a check valve plate having triangular weight protrusions according to embodiment 1 of the present invention;

FIG. 3 is a schematic structural diagram of a gasket between a valve plate and a valve body of a check valve according to embodiment 1 of the present invention;

FIG. 4 is a front view of a check valve having triangular-shaped weight protrusions according to embodiment 1 of the present invention;

FIG. 5 is a side view of a check valve having triangular-shaped weight protrusions according to embodiment 1 of the present invention;

FIG. 6 is a schematic view showing a closed and open state of a check valve having triangular-shaped weight protrusions according to embodiment 1 of the present invention;

FIG. 7 is a side view of a check valve having a drop-shaped vane according to embodiment 1 of the present invention;

FIG. 8 is a schematic view showing the closed and open states of a check valve having a droplet-shaped valve sheet according to embodiment 1 of the present invention;

FIG. 9 is a side view of a check valve having a concave valve plate according to embodiment 1 of the present invention;

FIG. 10 is a schematic view showing a closed state and an open state of a check valve having a concave valve plate according to embodiment 1 of the present invention;

FIG. 11 is a side view of a two-stage segmented check valve according to embodiment 1 of the present invention;

FIG. 12 is a schematic view showing the closed and open states of the two-stage stepped check valve according to embodiment 1 of the present invention;

FIG. 13 is a schematic view showing an open state of the two-stage sectional check valve according to embodiment 1 of the present invention under the control of a motor;

FIG. 14 is a side view of the four-stage segmented check valve of embodiment 1 of the present invention;

FIG. 15 is a schematic view showing the closed and open states of the four-stage segmented check valve according to embodiment 1 of the present invention;

FIG. 16 is a schematic view showing the four-stage sectional type check valve according to embodiment 1 of the present invention in an open state under the control of a motor;

FIG. 17 is a front view of the longitudinally split drain check valve of embodiment 1 of the present invention;

FIG. 18 is a side view of the longitudinally split drain check valve of embodiment 1 of the present invention;

FIG. 19 is a schematic view showing the closed and opened states of the longitudinally split type drainage check valve in embodiment 1 of the present invention;

FIG. 20 is a view showing the opened state of the longitudinally split type drainage check valve under the control of the motor in embodiment 1 of the present invention;

FIG. 21 is a schematic structural view of an outer tube of a check valve according to embodiment 1 of the present invention;

FIG. 22 is a top view of a check valve outer tube cap according to embodiment 1 of the present invention;

FIG. 23 is a schematic structural view of an outer tube cover of a check valve and a mating sealing member according to embodiment 1 of the present invention;

FIG. 24 is a view showing the positional relationship between the check valve well and the check valve outer tube according to embodiment 1 of the present invention;

FIG. 25 is a first schematic view of a first embodiment of a drainage check system of embodiment 1 of the present invention;

FIG. 26 is a second schematic view of the construction of the drainage check system of embodiment 1 of the present invention;

FIG. 27 is a third schematic view showing the construction of a drainage check system according to embodiment 1 of the present invention;

FIG. 28 is a fourth schematic view of the drain check system of embodiment 1 of the present invention;

FIG. 29 is a schematic structural view of a double check water discharge system according to embodiment 2 of the present invention;

fig. 30 is a schematic structural view of a downstream pipeline water blocking alarm double-check drainage system according to embodiment 3 of the present invention;

fig. 31 is a schematic structural view of a single non-return water discharge system of a downstream pipe water blocking alarm in embodiment 3 of the present invention;

FIG. 32 is a first schematic structural view of a malfunction alerting, non-return and draining system according to embodiment 4 of the present invention;

FIG. 33 is a second schematic structural view of a malfunction alerting, non-return and drainage system of embodiment 4 of the present invention;

FIG. 34 is the third schematic structural view of the malfunction alerting, non-return and drainage system of embodiment 4 of the present invention;

fig. 35 is a first schematic structural view of a building drainage system according to embodiment 5 of the present invention;

fig. 36 is a second schematic structural view of a building drainage system according to embodiment 5 of the present invention.

Reference numerals:

1001. a drainage check system; 101. a check valve; 101a, a first check valve; 101b, a second 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; 14. a first touch sensor; 15. a second touch sensor; 16. a first signal transmitter; 17. a first signal receiver; 18. a second signal transmitter; 19. a second signal receiver; 20. an inspection well; 21. a riser; 22. a ground branch pipe; 23. a basement branch pipe; 24. basement drainage trunk.

Detailed Description

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate preferred embodiments of the invention and together with the description, serve to explain the principles of the invention and not to limit the scope of the invention.

Example 1

In one embodiment of the present invention, a drain back check system is disclosed, as shown in fig. 24 to 28, comprising a check valve 101, a check valve outer tube 5 and an outer tube cap 6; 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 or external force of upstream water flow 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 sealed and 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, as shown in fig. 1 to 3, the check valve 101 includes a valve body 1 and a valve plate 2, and the valve plate 2 is rotatably connected to the valve body 1. As shown in fig. 21 to 23, the outer tube cover 6 is provided with a valve body mounting opening 6-6, the valve body 1 is mounted at the valve body mounting opening 6-6 through a rotating assembly, and the valve plate 2 of the check valve 101 is assembled with the valve body 1 and then arranged 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.

Further, the valve body 1 is connected with the valve plate 2 through a rotating shaft, or the valve body 1 is connected with the valve plate 2 through a ring locking connection piece.

In this embodiment, the valve plate 2 is an integral structure or a segmented structure. If the valve plate is of an integral structure, the gravity center of the valve plate is arranged at the 1/2-integral lower part 2/3 of the whole valve plate 2; if the valve plate is of a segmented structure, 1/2 parts and the lower part 1/4 parts of the valve plate are provided with rotating shafts, so that the valve plate 2 can be opened under different working conditions. When the sanitary ware is arranged at the upstream for drainage, the collected water flow impulse can directly act on the gravity center of the valve plate or the whole part of the valve plate of the sectional type valve plate under different flow rates, so that the water flow impulse can be intensively acted on the valve plate to form potential energy, the energy loss is reduced, and the valve plate is opened or lifted.

A check valve of this embodiment, as shown in fig. 4 to 6, the upstream surface and/or the surface of a poor water of valve block 2 set up triangle-shaped counter weight arch, form the counter weight with the material, guarantee that the focus of valve block 2 is located lower part in the valve block 2, the protruding symmetry of triangle-shaped counter weight sets up in the both sides of valve block 2, and check valve 101 relies on self action of gravity to hang down naturally for the normally closed state, and valve block 2 normally closed at ordinary times, laminates in check valve 101 valve body 1.

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.

The check valve of this embodiment, as shown in fig. 7-8, valve block 2 sets up to the water droplet shape structure of weight under light, the valve block of this structure can great counter weight, valve block and check valve outer tube inner wall in close contact with, flow is not opened when less, only can dash when flow is great, because the lower part weight of valve block is big, sealing performance is good, prevent that the effect of 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 check valve of this embodiment, as shown in fig. 9 to 10, the upstream surface and/or the downstream surface of the valve plate 2 are/is a concave curved surface, which can reduce the ineffective loss of water flow when impacting the valve plate, and the concave curved surface can increase the force-bearing area of the valve plate 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.

The check valve of this embodiment is horizontal multifold type structure, and valve block 2 of check valve is rotated by a plurality of valve block segmentations and is connected and form, includes two sections valve block segmentations at least.

Further, the valve plate 2 is a transverse half-open type valve plate. As shown in fig. 11 to 13, the valve sheet 2 includes two valve sheet segments, the two valve sheet segments are connected by a rotating shaft, the valve sheet segments are obliquely cut at a seam on the upstream side, and an included angle between an interface surface of the two valve sheet segments and a center line of the valve sheet 2 is 45 °, wherein the center line of the valve sheet is located in the valve sheet body and is parallel to the surface of the valve sheet in a natural closing state. Further, the areas of the two sections of valve plates are equal, or the area of the valve plate at the lower part is smaller than that of the valve plate at the upper part, and the area of the valve plate at the lower part is equal to 1/2-4/5 of the area of the valve plate at the upper part.

Further, the valve sheet 2 is a transverse multi-folding valve sheet, as shown in fig. 14 to 16, the valve sheet 2 includes 4 valve sheet segments, the valve sheet segments are obliquely cut at a seam at the upstream side, an included angle between the interface surface of two adjacent valve sheet segments and the center line of the valve sheet 2 is 45 degrees, the two adjacent valve sheet segments are connected through a rotating shaft, the center line of the rotating shaft is perpendicular to the water flow direction, the end surface of the rotating shaft connected with the valve sheet segments is an inclined surface, the rotating shaft is arranged at the back water surface side of the valve sheet, and the valve sheet segments can rotate around the rotating shaft at the upper end of the valve sheet segment to be opened at the downstream direction under the impact of the water flow and can reset under the self gravity action of the valve sheet segments. 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 the valve plate mechanically drains water and stops returning by the self gravity of the valve plate.

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

In the check valve of this embodiment, as shown in fig. 17 to 20, 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. The middle rotating shaft 2-3 arranged in the middle of the valve plate is provided with a limiting part for limiting the rotating angle of the left valve plate and the right valve plate, so that the left valve plate and the right valve plate are in the same plane with the middle rotating shaft 2-3 in a natural state, the left valve plate and the right valve plate can only be opened towards the water direction at the original positions under the action of sewage impact, and when the left valve plate and the right valve plate 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 longitudinally split check valve only depends on the opening degree of the left and right valve plates and cannot meet the requirement of rapid sewage discharge, therefore, in order to better control the opening and closing state of the check valve, 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 by the motor to swing along the flow direction of sewage, and when the highest swing 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 this embodiment, the upper end of valve block 2 has set firmly manual connecting rod 4 for use when manual swing, rotates manual connecting rod 4, and manual connecting rod 4 can drive valve block 2 and 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 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. 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 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.

In a preferred embodiment of this embodiment, the check valve 101 is an electric check valve, and the opening and closing of the valve plate 2 are controlled by a motor, specifically, by arranging a motor on the outer valve cover 6, the output shaft of the motor is connected with the valve plate 2 through a connecting piece, and the valve plate 2 is driven by the motor to open or close, and the controller keeps the normally closed or normally open state of the valve body 1 according to the liquid level signal transmitted by the monitoring component.

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.

In order to prolong the service life of the check system, 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 order to ensure that the cover of the outer pipe 5 of the check valve does not overflow due to water fullness when the manual connecting rod 4 above the valve plate 2 moves freely, a sealing washer is arranged below the outer pipe cover 6. 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 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. By adopting the drainage non-return method of the drainage non-return system in the embodiment and the like, the problem that the pressure drainage system cannot be arranged in the basement due to the limitation of the building foundation condition 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.

Example 2

Considering that only one check valve 101 is provided in the drainage check system, once the check valve 101 fails, if the rear end of the check valve 101 is blocked by a foreign object, the drainage check system cannot normally operate, and the difficulty in maintenance is large when the drainage amount is large, and the operational stability of the drainage check system is poor.

In view of the above problems, another embodiment of the present invention discloses a double check drainage system based on the drainage check system disclosed in embodiment 1, as shown in fig. 29, which comprises an outer check pipe 5 and an outer pipe cover 6, wherein at least two check valves 101 of embodiment 1 are disposed in the outer check pipe 5, the check valves 101 can be opened under the control of the impact of upstream water flow or external force, and the check valves 101 can be closed under the control of self-gravity or external force. The check valve 101 is a purely mechanical check valve or an electric check valve, and the purely mechanical check valve is opened and closed under the action of the drainage impact force and the self gravity of the check valve 101; the electric check valve is opened and closed by means of a control motor.

Further, the double-check drainage system is provided with two purely mechanical check valves 101, and the two check valves 101 are completely opened and closed under the action of drainage impact force and the self gravity of the check valves 101. Specifically, one check valve is added after the single check valve of the check valve outer tube 5, i.e., a second check valve 101b is disposed downstream of the first check valve 101 a. When an operator observes from the observation hole that the second check valve 101b is jammed and cannot be normally opened, the second check valve 101b is manually controlled to be opened, if the jam continues, the upstream first check valve 101a is manually opened, and the double check valves 101 are arranged to ensure the safety of the drainage pipeline and facilitate maintenance.

Further, the double check drainage system comprises two check valves 101, the first check valve 101a being an electric check valve and the second check valve 101b being a purely mechanical check valve; also included are submersible sewage pumps 9, a control system 10, and monitoring components. Wherein, the submersible sewage pump 9 and the matched motor are arranged in the valve well above the check valve outer pipe 5, and the water suction port is arranged in the valve body 1. The submersible sewage pump 9 is arranged between the two check valves 101, the monitoring component adopts a liquid level sensor, and the liquid level sensor is arranged at the downstream of the check valves 101 and is used for monitoring the water level at the downstream of the check valves 101; the control system 10 is used for receiving the liquid level information transmitted by the monitoring assembly, judging whether congestion occurs according to the liquid level information, and further controlling the submersible sewage pump 9 to be started and closed and the electric check valve 101 to be opened and closed.

Further, the liquid level sensor includes a first sensor 12 and a second sensor 13, and a first check valve 101a, the first sensor 12, a second check valve 101b, and the second sensor 13 are disposed in this order from upstream to downstream. When the second sensor 13 detects that the liquid level reaches the preset level and the first sensor 12 does not reach the preset liquid level signal, it indicates that the downstream of the second check valve 101b is choked and the upstream is temporarily not drained. At this time, if drainage occurs upstream, drainage should be performed by a submersible sewage pump. When the first sensor 12 detects that the liquid level reaches the preset level, the first sensor 12 sends a signal to the control system 10, the control system 10 controls the submersible sewage pump 9 to work, sewage on the upstream of the second check valve 101b is discharged to the downstream of the second check valve 101b, and the purpose of smooth water discharge is achieved. If the first sensor 12 and the second sensor 13 continuously monitor the signals (for 5-10 min), it indicates that the second check valve 101b cannot normally operate, that is, the purely mechanical check valve 101 cannot be closed along with the backflow of the drainage water and is opened along with the normal flow direction of the drainage water, and at this time, the control system 10 sends out an alarm buzzer and forcibly closes the first check valve 101 a. If the drainage requirement exists, the worker on duty needs to manually close the check valve 101b, then the manual control system 10 starts the submersible sewage pump 9 to work, and the submersible sewage pump is overhauled when the electricity is safe (after the pump is stopped).

Further, both check valves 101 of the double check drain system are electric check valves, the opening and closing of the first check valve 101a and the second check valve 101b are controlled by the control system 10, and the first check valve 101a, the first sensor 12, the second check valve 101b and the second sensor 13 are sequentially arranged from upstream to downstream. The operation of the drainage system provided with the double electric check valve 101 is as follows:

when the downstream water level rises, the second check valve 101b is automatically closed by the control system 10 to prevent the downstream water from flowing backward. If the second check valve 101b cannot be normally closed due to a fault or a foreign object is stuck, the first check valve 101a is automatically closed under the influence of the impact force of the flowing water in the pipe, and the control system 10 timely sends an alarm to the duty room when sensing that the first check valve 101a is closed and the second check valve 101b is opened, so as to wait for maintenance personnel to maintain before.

When the second check valve 101b can be opened and closed normally after maintenance, the water level of the pipe section before the second check valve 101b is increased due to the influence of upstream drainage. When the first sensor 12 detects that the water level reaches the pump-up liquid level limit value, a pump-up signal is transmitted to the control system 10, and the control system 10 controls the submersible sewage pump 9 to be started, so that sewage in the cavity between the two check valves 101 and before the check valve 101 is discharged to the downstream of the second check valve 101 b.

When the sewage level in the chamber drops to a normal level (pump-off level), the lift pump set is controlled by the control system 10 to close.

When the downstream water blocking disappears and the second sensor 13 cannot detect the water level, the second check valve 101b is automatically opened, and the drainage system works normally.

Compared with the prior art, the double-check drainage system provided by the embodiment is beneficial to preventing backflow backwater and water damming in the drainage system by arranging the control system 10, the double-check valve and the double sensors, can dredge the drainage pipeline by utilizing the pressure of the lifting submersible sewage pump 9 when the pipeline is blocked, and is beneficial to preventing backflow of downstream water flow, improving the reliability of the system and preventing the water flow from draining in the opposite direction. The control system 10 comprises an alarm device, so that an alarm effect can be effectively achieved, a worker is reminded to check whether pipeline damage and difficult dredging congestion occur, and the stability and safety of the system are guaranteed.

Example 3

Because the existing drainage check valve has single function, only plays a role of preventing backflow in a pipeline, and does not have the downstream water-retaining and strong drainage capacity. In another embodiment of the present invention, a back-flow check drainage system for a downstream pipeline back-up alarm is disclosed, as shown in fig. 30 to 31, the system includes a back-flow check valve 101, a back-flow check outer tube 5 and an outer tube cover 6 according to embodiment 1, wherein the back-flow check valve 101 is a purely mechanical back-flow check valve or an electric back-flow check valve. Wherein, the pure mechanical check valve is opened and closed by the impact force of the drainage and the self gravity of the check valve; the electric check valve is opened and closed by means of a control motor.

In this embodiment, the check valve outer tube 5 is used to mount components such as the check valve 101, the submersible sewage pump 9, and a sensor (level gauge). The check valve outer tube 5 is made of an anticorrosive material such as plastic, stainless steel, etc. The reducing treatment is adopted at the junction of the check valve outer pipe 5 and the upstream drainage pipeline, the gradient is increased, the water flow speed is increased, the pipe bottom of the check valve outer pipe 5 is flushed, the dirt deposition is prevented, the first check valve 101a is pushed open, and the drainage is convenient and smooth.

In this embodiment, the outer tube cover 6 and the check valve outer tube 5 together form an integral housing of the drainage check system. The outer tube cover 6 is located above the outer tube 5 of the check valve and the cover plate 8 is positioned flush with the surrounding ground when installed.

In this embodiment, the downstream pipeline backwater alarm non-return drainage system further includes a monitoring component, a control system 10, and a submersible sewage pump 9. Wherein the monitoring assembly is used for monitoring the water level upstream and downstream of the check valve, such as a liquid level sensor; the control system 10 includes a controller, an alarm device, and a power controller, which are integrally disposed in the controller. The controller is connected with the sensor, can receive upstream and downstream water level signals monitored by the sensor, analyzes upstream and downstream water level states, and sends action instructions to the submersible sewage pump 9, the check valve 101 and the alarm device according to the upstream and downstream water level states. The power supply controller is used for controlling the power supply to discharge.

In the present embodiment, the submersible sewage pump 9 is provided upstream of the check valve 101, and if two check valves 101 are provided, the submersible sewage pump 9 is provided between the two check valves 101, or one submersible sewage pump 9 is provided upstream of each check valve 101. And starting when the downstream pipeline is choked, and forcibly discharging the drainage generated at the upstream into the downstream pipeline or directly into a subsequent inspection well 20.

In this embodiment, the downstream pipeline backwater alarm non-return drainage system is provided with two sensors, including a first sensor 12 and a second sensor 13. Wherein, the first sensor 12 is a pressure or photoelectric sensor for detecting the upstream drainage water level and transmitting the upstream water level signal to the controller; a second sensor 13, which is a pressure or photoelectric sensor, for detecting the downstream water level, is able to transmit a downstream water level signal to the controller.

In this embodiment, the number of the check valves 101 is one or more, and preferably, two check valves 101 are provided.

In one embodiment of this embodiment, the downstream pipeline choking alarm check drain system is provided with two check valves 101 and two sensors.

In the two check valves 101, the first check valve 101a has no external power, and the opening or closing of the check valve is controlled by the self gravity or an automatic reset resistance device such as a spring, hydraulic pressure, air pressure and the like, or the opening or closing of the check valve is controlled by an external power device, a motor and an air pressure pump, and the starting and stopping of the motor and the air pressure pump are controlled by a controller; the second check valve 101b is manually controlled, is always in an open state in normal operation, and can be manually closed when the system gives a downstream water-stop alarm, so that the backflow prevention capability of the check valve 101 system can be enhanced on one hand, and the maintenance is convenient on the other hand. When other system components, such as the first check valve 101a, the submersible sewage pump 9, the pressure sensor and other components need to be overhauled, the second check valve 101b can be manually closed, the whole drainage system does not need to be stopped, and the overhauling difficulty and the influence on the drainage system of the building are reduced.

In the double sensors, the first sensor 12 is used for detecting the upstream drainage water level condition, the second sensor 13 is used for detecting the downstream drainage water level condition, the first sensor 12 and the second sensor 13 can transmit the monitored water level information to the controller, and the controller summarizes and analyzes the water level data of the two sensors, judges whether downstream water choking occurs or not and further controls the action of the alarm device, the submersible sewage pump 9 and the check valve 101.

In this embodiment, the dual sensors are used to monitor the upstream and downstream water levels of the check valve 101 system, and the controller determines the water level conditions and directs the operation of the electric check valve 101 and the submersible sewage pump 9. According to the power configuration of the first check valve 101a, the check drain system of the present embodiment is divided into the following two types:

A) the drainage system uses a first check valve 101a controlled by an automatic reset device, and the first check valve has no external power device. The automatic resetting device adopts the modes of spring, hydraulic pressure, air pressure and the like for resetting, and because the resistance of the automatic resetting device such as spring, hydraulic pressure, air pressure and the like is fixed, when the upstream pressure is greater than the downstream pressure, the stress of the check valve 101 is consistent with the designed water flow direction of the pipeline, and the check valve is automatically opened, so that gravity drainage can be realized. Wherein the upstream pressure refers to the water level pressure of the upstream drain system of the check valve 101, and the downstream pressure refers to the sum of the automatic return resistance device pressure and the downstream pipe water level pressure. When the upstream pressure is lower than the downstream pressure, the check valve 101 is forced to reverse the designed water flow direction of the pipeline, and automatically closes, so that the water flow stops, and meanwhile, the downstream drainage recharge is prevented. The controller identifies and analyzes the upstream and downstream water level conditions, and when the downstream water level condition is found, the submersible sewage pump 9 is started to force the upstream sewage intercepted by the check valve 101 to the downstream drainage pipeline or the inspection well 20 through the pipeline of the submersible sewage pump 9 and surpass the first check valve 101 a.

B) The drainage system employs an externally powered first check valve 101 a. The controller recognizes and analyzes the upstream and downstream water levels of the check valve 101 system, and controls the open/close states of the first check valve 101a and the submersible sewage pump 9. When there is no downstream surge, the controller commands the first check valve 101a to fully open and the upstream drain to drain with less resistance. When the downstream is congested, the controller instructs the first check valve 101a to be completely closed, so as to prevent the pipeline from flowing backwards and recharging, and the submersible sewage pump 9 is started to drain the upstream pipeline beyond the first check valve 101a and forcibly drain the upstream pipeline to the downstream drainage pipeline or the inspection well 20.

In this embodiment, the downstream pipeline backwater alarm check drainage system with the double check valve 101 includes, but is not limited to, the following three structures:

the non-return drainage system of the first structure includes a fixed resistance check valve, a manual check valve, a dual sensor, a submersible sewage pump 9, a controller, and a check valve outer tube 5. The non-return drainage system with the structure has the advantages of simple structure, high reliability and relatively low manufacturing cost. However, since the upstream drainage needs to overcome the resistance device of the check valve 101, the drainage resistance is relatively high, and since the drainage resistance control needs to be considered, the closing force of the fixed resistance device on the check valve 101 is small, and the possibility of being blocked by solid matters in the sewage exists. When the downstream is congested, the alarm device prompts the recharge risk and needs to manually close the manual check valve.

The non-return drainage system of the second structure comprises an electric non-return valve, a manual non-return valve, a double sensor, a submersible sewage pump 9, a controller and a non-return valve outer pipe 5. This structure non-return drainage system adopts electronic check valve, by the switching of the first check valve 101a of independent motor control, the closed dynamics of motor drive check valve 101 is big, is difficult for being blocked, and the reliability is high. Because the fixed resistance device is not separately arranged, the upstream drainage can pass through the check valve 101 under the condition of no extra resistance, the drainage is smoother, and the deposition of dirt is not easy to cause.

The non-return drainage system of the third structure includes a fixed resistance check valve, a manual check valve, a double sensor, an alarm device, and a check valve outer tube 5. The drainage non-return system of this structure is the simplified structure of a structure, does not set up stealthily dirty pump 9 and controller, and the structure is simpler, and the cost is lower, can send out the police dispatch newspaper when the risk of damming up at the low reaches, and the suggestion needs the manual check valve of manual closing.

The first water drainage non-return method of the structure non-return water drainage system comprises the following steps:

the user uses the drainage device to discharge the generated sewage and waste water to the pipeline branch pipe of the drainage system. The drainage is collected by the drainage system manifold and collected to the section of pipe between the last drainage fixture of this manifold and the double check valve 101 equipment. The drained water reaches the position of the water inlet reducer pipe of the equipment, and the water flow speed is increased through the slope action of the pipeline. At the same time, the water level rises to trigger the first pressure sensor before the first check valve 101a, which generates a signal and transmits it to the controller of the control system 10. If no water is choked in the downstream pipeline, the drained water in the equipment pushes away the first check valve 101a by gravity flow and is drained into a subsequent pipe section and the inspection well 20 through the second check valve 101 b. If the downstream pipeline is choked, in order to avoid that the pressure difference between the upstream and the downstream of the first check valve 101a is too small, the flowing speed of the sewage is reduced, the sewage is deposited and then the pipeline is blocked, the controller starts the submersible sewage pump 9 to forcibly discharge the upstream sewage, the pressure of the upstream is reduced in the forcible discharge process, the first check valve 101a is closed, and the backflow is prevented. The first check valve 101a automatically closes after the upstream drain by gravity, spring, hydraulic, pneumatic means.

The drainage non-return method of the non-return drainage system with the second structure comprises the following steps:

the user uses the drainage device to discharge the generated sewage and waste water to the pipeline branch pipe of the drainage system. The drainage is collected by the drainage system manifold and collected to the section of pipe between the last drainage fixture of this manifold and the double check valve 101 equipment. The drained water reaches the position of the water inlet reducer pipe of the equipment, and the water flow speed is increased through the slope action of the pipeline. At the same time, the water level rises to trigger the front pressure sensor of the first check valve 101a, which generates a signal and transmits it to the controller in the control box. After receiving the water level/pressure signal of the first sensor 12, the controller detects the water level/pressure state of the second sensor 13 and judges whether the downstream drainage system is congested. If no water is blocked at the downstream, the first check valve 101a is kept in an open state, the submersible sewage pump 9 is not started, and the drainage water in the pipeline passes through the first check valve 101a and the second check valve 101b in sequence by virtue of gravity and enters a subsequent downstream drainage pipeline or an outdoor drainage system inspection well 20. If the downstream of the device is congested, the water level/pressure value collected by the second sensor 13 is greater than that of the first sensor 12, and the controller sends a signal to start the motor and close the first check valve 101 a. And continuously collecting signals of the first sensor 12, starting the submersible sewage pump 9 to forcibly discharge the upstream sewage to a downstream pipeline or inspection well 20 when the signals are greater than a set value of the system, wherein the pressure value of the first sensor 12 for starting the submersible sewage pump 9 needs to be set independently according to a drainage system installed on the equipment, so that on one hand, smooth drainage of an upstream drainage appliance is ensured, and meanwhile, the starting times of the submersible sewage pump 9 are reduced as much as possible. When the controller detects that the downstream water choking condition is relieved, the control motor works to open the first check valve 101a, and the upstream drainage is continuously drained by means of gravity. If the controller detects that the motor of the first check valve 101a is in fault or the check valve 101 is not closed tightly after a closing instruction is made, a pipeline recharging alarm is sent out to prompt that the manual check valve 101 needs to be closed manually.

The drainage non-return method of the non-return drainage system with the third structure is similar to the first drainage non-return method in process, and the working process is not repeated herein.

Compared with the prior art, the downstream pipeline that this embodiment provided chokes water warning non return drainage system adopts integrated form integral structure to set up, has following advantage:

(1) and part of the drainage pipeline is used as a water collecting tank of the sewage pump, so that the space for building a water collecting tank and the civil engineering cost required by the traditional method are saved.

(2) The product is assembled and installed by adopting engineering plastics, the shell is integrally formed, the leakage point possibly existing due to the coating of waterproof paint and the like can be avoided, and the risk of sewage permeation and pollution is avoided.

(3) Sewage is flushed promptly and is arranged promptly, and pipeline reducing and the slope before the cooperation pump, the velocity of water flow is guaranteed, avoids filth deposit to block up, need not to set up the pipeline that washes, reduces and uses installation cost.

(4) Pressure sensors are arranged at the two check valves, automatic control of the water pump can be achieved, the water pump is not started to discharge by gravity when no water is blocked at the downstream, and the water pump is started to discharge water when water is blocked at the downstream, so that normal water discharge of a user is guaranteed.

Example 4

To drainage check system discharge sewage, check valve 101 is blocked by impurity easily, and check valve 101 can not in time reset to the water blocking is blocked in the mistake, thereby leads to the condition of system failure. Therefore, in another embodiment of the present invention, a malfunction warning check drainage system is disclosed, in which a malfunction monitor for monitoring whether the check valve 101 malfunctions is added to the check drainage system of embodiments 1 to 3. As shown in fig. 32 to 34, the malfunction warning check drain system includes a check valve 101, a check valve outer tube 5, an outer tube cap 6, and a malfunction monitor, and the check valve 101 is a purely mechanical check valve or an electric check valve. The fault alarm non-return drainage system also comprises a monitoring assembly, a control system 10 and a submersible sewage pump 9, wherein the monitoring assembly is used for monitoring the water level state in the check valve outer pipe 5; the control system 10 includes a controller, an alarm device, and a power controller, which are integrally disposed in the controller. The controller is connected with the monitoring assembly and the fault monitor, can receive the water level signal monitored by the monitoring assembly and the information whether the check valve monitored by the fault monitor is in fault, can judge whether the check valve is in fault, and sends an action instruction to the submersible sewage pump 9, the check valve 101 and the alarm device according to the information whether the check valve is in fault.

In this embodiment, the monitoring assembly includes two sensors, a first sensor 12 and a second sensor 13, the first sensor 12 being disposed upstream of the second sensor 13. Wherein the first sensor 12 is a pressure or photoelectric sensor for detecting an upstream drain water level of the first check valve 101a, and is capable of transmitting an upstream water level signal to the controller; the second sensor 13, which is a pressure or photoelectric sensor, for detecting the downstream water level of the second check valve 101b, can transmit a downstream water level signal to the controller.

In this embodiment, the fault detector includes, but is not limited to, a contact sensor mode and a signal sensing mode, and the two fault monitoring modes of the check valve 101 are specifically:

the first type of fault monitor is a contact sensor, which is disposed on the manual link 4 above the valve plate 2 of the check valve 101 and on the valve body 1 member contacted by the manual link 4, that is, a first portion of the contact sensor is mounted on the manual link 4, a second portion of the contact sensor is mounted on the valve body 1 member contacted by the manual link 4, and when the check valve 101 is in a closed state, the first portion is in contact with the second portion. When the check valve 101 is in the open state, the first portion is separated from the second portion. The condition that the sensor installed on the check valve plate 2 is interfered by other substances in sewage to cause false alarm can be discharged by adopting a contact sensor mode.

The working process of the drainage system adopting the first fault monitor is as follows:

when the first sensor 12 and the second sensor 13 detect that there is no water, and the contact sensors display contact, the contact sensors send contact signals to the controller, the check valve 101 is normal, and the controller and the alarm device do not act.

When the first sensor 12 and the second sensor 13 detect that there is no water, and the contact sensors display no contact, the check valve 101 may be stuck by dirt, the contact sensors send out a non-contact signal to the controller, the controller controls the alarm device to alarm, and the worker manually opens the cover plate 8 above the check valve 101 to manually remove the dirt.

A second type of fault monitor is a signal sensing assembly that includes a signal transmitter and a signal receiver. The signal transmitter is arranged on the manual connecting rod 4 above the valve plate 2 of the check valve 101, and the signal receiver is arranged on the corresponding position of the valve well wall 7 above the outer pipe 5 of the check valve. When the check valve 101 is in a closed state, a signal sent by the signal transmitter can be received by the signal receiver; when the check valve 101 is opened at a certain angle (above 5 °), the signal from the transmitter is shifted, and the signal receiver is not connected.

The working process of the drainage system adopting the second fault monitor is as follows:

when the first sensor 12 and the second sensor 13 monitor no water and the signal receiver indicates signal access, the check valve 101 is normal.

When the first sensor 12 and the second sensor 13 monitor that there is no water and the signal receiver indicates no signal access, the check valve 101 may be stuck with dirt and malfunction. The receiver sends the signal of no signal access to the controller, and the controller judges that check valve 101 breaks down, and the controller control alarm device reports to the police, and manual opening the apron 8 of check valve 101 top is manual clear away the filth, makes check valve 101 resume normal.

In this embodiment, if the system is provided with a check valve 101, a touch sensor or a signal sensor assembly is provided. If the system is provided with two check valves 101, two contact sensors are correspondingly arranged, wherein the first check valve 101a is provided with the first contact sensor 14, and the second check valve 101b is provided with the second contact sensor 15; alternatively, two sets of signal sensing components are provided, a first check valve 101a providing the first signal emitter 16 and the first signal receiver 17, and a second check valve 101b providing the second signal emitter 18 and the second signal receiver 19.

Compared with the prior art, the fault alarm non-return drainage system provided by the embodiment adopts an integrated structure, the drainage check valve is arranged on the basement drainage pipe, so that sewage can automatically flow to the outdoor inspection well 20 by gravity and can be prevented from flowing backwards, and the small drainage pump is arranged, so that continuous drainage can be ensured when water blocking occurs in the downstream; through setting up check valve fault monitor, solved the check valve because of being blocked by impurity easily and can not in time reset to the harmony water of mistake report, thereby lead to the difficult problem of system failure, improved the reliability of system, guarantee this system not block the check valve because of the filth and lead to the system failure, improved the work fail safe nature of system greatly.

Example 5

In another embodiment of the present invention, a building drainage system is disclosed, wherein the drainage non-return system 1001 of embodiments 1 to 4 (i.e. the drainage non-return system of embodiment 1, the double non-return drainage system of embodiment 2, the downstream pipeline choking alarm non-return drainage system of embodiment 3, or the malfunction alarm non-return drainage system of embodiment 4) is adopted, the drainage non-return system 1001 is disposed on the basement drainage trunk 24, the water inlet of the drainage non-return system 1001 is connected to the water outlet of the basement drainage trunk 24, and the above-ground drainage and the drainage of the underground floor are combined and drained into a park pipe network by gravity. The water collecting pit does not need to be independently arranged for draining the underground layer, and a common sewage lifting drainage system of the water collecting pit is adopted below the underground layer. The building drainage system is suitable for the height of municipal sewage pipe network interfaces with the elevation lower than that of a drainage point on the underground layer.

As shown in fig. 35 to 36, the building drainage system includes a vertical pipe 21, a ground branch pipe 22, a basement branch pipe 23, and a basement drainage trunk pipe 24, wherein the ground branch pipe 22 is disposed in each floor above the ground, the basement branch pipe 23 and the basement drainage trunk pipe 24 are disposed in the basement, and the ground branch pipe 22 and the basement branch pipe 23 are connected to drainage equipment on the floor; the ground branch pipe 22 and the basement branch pipe 23 are communicated with the vertical pipe 21, after all the branch pipes are connected to the vertical pipe 21, namely after the branch pipe of the last drainage device is connected to the vertical pipe 21, the water outlet of the vertical pipe 21 is connected with the water inlet of the basement drainage main pipe 24, and the water outlet of the drainage main pipe is connected with the drainage non-return system 1001.

In order to prevent the water seal of the sanitary ware connected to the vicinity of the bottom area of the vertical pipe 21 from being damaged due to excessive positive pressure at the bottom of the vertical pipe 21 and water accumulation in the horizontal trunk pipe, the vertical pipe 21 is arranged at a safe distance downstream of the drainage check system 1001, specifically, the vertical pipe 21 is arranged at a safe distance of at least 1.5m behind the downstream of the drainage check system 1001, and the drainage horizontal branch pipe is connected with the ground vertical pipe 21 and then is connected to the inspection well 20.

In order to circulate air and stabilize pressure in the drainage system, the vertical pipe 21 is provided with a special ventilation vertical pipe, and the special ventilation vertical pipe is arranged on the vertical pipe 21 at the 12 th floor and above.

In the valve well above the check valve outer pipe 5, a small submersible sewage pump 9 and a motor are arranged, a water pump control device is externally connected, the water pump control device comprises a sensor, a controller and an alarm device, when the downstream of the check valve 101 is in water blocking (when outdoor rainfall or sewage flows backwards), the automatic control of the water pump can be realized when no person manages, the submersible sewage pump 9 is started, and the submersible sewage pump 9 discharges water blocking to the downstream connector of the drainage non-return system 1001 through a pipeline; alternatively, submersible sewage pump 9 discharges the water block directly into the downstream or nearest manhole 20 through a separately laid pipeline. It should be noted that the drainage of the submersible sewage pump 9 is prohibited from accessing the gravity drainage system in the gravity building.

In order to ensure that the submersible sewage pump 9 can smoothly discharge sewage at the check valve 101 to the downstream or the inspection well 20 when water is blocked in the downstream, the lift of the submersible sewage pump 9 is greater than the distance H from the interface elevation of the downstream pipeline to the ground elevation of the inspection well 20.

In this embodiment, the drainage of the bottom water-consuming appliance is connected to the horizontal trunk pipe at a distance of not less than 600mm from the vertical pipe 21, that is, the drainage of the water-consuming appliance in the basement is connected to the branch pipe at a distance of not less than 600mm from the vertical pipe 21.

When the height of the basement is low, interlayer drainage is selected, drainage on one floor is directly connected to the inspection well 20, and drainage on two or more floors is connected to the inspection well 20 through the basement drainage non-return system 1001.

The height of the bottom of the pipe connected to the inspection well at the downstream of the non-return drainage system is at least 300mm higher than the bottom elevation of the inspection well 20, namely the total depth H of the inspection well is more than or equal to 300mm, and the total depth H of the inspection well is the height difference between the bottom of the water outlet pipe and the ground of the inspection well, so that the discharged sewage is prevented from flowing backwards.

Compared with the prior art, the building drainage system that this embodiment provided is applicable to the condition that basement minimum drainage point height is higher than garden drainage pipe network height, will be on the ground with the one deck drainage setting in a system underground, need not set up the sump alone for the one deck drainage. The check valve is arranged on the basement drainage pipe, so that the basement can be provided with the gravity drainage system, and the reverse flow can be prevented. And a small-sized drainage pump is arranged on the basis to ensure that indoor drainage can be continued when water blocking occurs at the downstream. The system can ensure that a civil sump and a matched submersible sewage pump are not needed to be arranged under the condition of non-fire-fighting drainage requirements of basements such as partial residences and villas, and effectively reduces the civil construction requirements of basement drainage and the professional requirements of daily operation and maintenance.

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 are included in the scope of the present invention.

Claims

1. A drainage non-return method of a building drainage system is characterized in that the drainage system comprises a drainage non-return system (1001), and the drainage non-return system (1001) is arranged on a basement drainage main pipe (24);

the drainage check system (1001) comprises a check valve (101), a check valve outer pipe (5), a monitoring assembly, a submersible sewage pump (9), a control system (10) and a fault monitor;

the check valve (101) comprises a first check valve (101 a) and a second check valve (101 b), the first check valve (101 a) is electrically controlled, and the second check valve (101 b) is manually controlled;

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 before the first check valve (101 a) and a downstream cavity after the second check valve (101 b);

the cavity wall of the upstream cavity of the check valve (101) is arranged in a diameter-variable manner, the cavity wall of the upstream cavity comprises a front section and a rear section, the front section is connected with the rear section in a diameter-variable manner, the pipe diameter of the rear section is larger than that of the front section, and the pipe diameter of the rear section is equal to that of the downstream cavity;

the submersible sewage pump (9) is arranged between the first check valve (101 a) and the second check valve (101 b), or one submersible sewage pump (9) is arranged at the upstream of the first check valve (101 a) and the second check valve (101 b); the check valve (101) comprises a valve body (1) and a valve plate (2), and the valve plate (2) is rotatably connected with the valve body (1);

the upper end of the valve plate (2) is fixedly provided with a manual connecting rod (4), and the valve plate (2) can be driven to rotate by rotating the manual connecting rod (4);

the monitoring assembly is used for monitoring whether water and water level information exist in the cavity of the outer check valve pipe (5) and transmitting the water and water level information whether exist in the cavity of the outer check valve pipe (5) to the control system (10);

the control system (10) comprises a controller and an alarm device, wherein the controller can control the sewage pump to be started or closed according to the information transmitted by the monitoring assembly (5) and control the alarm device to give an alarm;

the monitoring assembly adopts a liquid level sensor, the liquid level sensor comprises a first sensor (12) and a second sensor (13), and a first check valve (101 a), the first sensor (12), a second check valve (101 b) and the second sensor (13) are sequentially arranged from upstream to downstream;

the fault monitor comprises a signal sensing assembly, wherein the signal sensing assembly comprises a signal transmitter and a signal receiver;

the signal emitter is arranged on a manual connecting rod (4) above a valve plate (2) of the check valve (101), and the signal receiver is arranged at a corresponding position of a valve well wall (7) above a check valve outer pipe (5); when the check valve (101) is in a closed state, a signal sent by the signal transmitter can be received by the signal receiver; when the opening angle of the check valve (101) is more than 5 degrees, the signal sent by the transmitter is deviated, and the signal receiver has no signal access;

the method for preventing the drainage from being blocked comprises the following steps:

the drained water reaches the water inlet diameter-changing position of the equipment, the water flow speed is increased under the action of the gradient of the pipeline, meanwhile, the water level rises to trigger a first sensor (12) in front of a first check valve (101 a), and the first sensor (12) generates a signal and transmits the signal to a controller; after receiving the water level signal of the first sensor (12), the controller detects the water level state of the second sensor (13) and judges whether the downstream drainage system is congested or not; if no water is blocked at the downstream, the opening state of the first check valve (101 a) is kept, the submersible sewage pump (9) is not started, and the drainage in the pipeline passes through the first check valve (101 a) and the second check valve (101 b) in sequence by virtue of gravity and enters a subsequent downstream drainage pipeline or an outdoor drainage system inspection well (20); if the downstream of the equipment is congested, the water level value collected by the second sensor (13) is larger than that of the first sensor (12), the controller sends a signal to start the motor, close the first check valve (101 a) and continuously collect the signal of the first sensor (12); when the sewage flow rate is larger than the set value of the system, the submersible sewage pump (9) is started to forcibly discharge the upstream sewage to a downstream pipeline or an inspection well (20); when the controller detects that the downstream water choking condition is relieved, the motor is controlled to work to open the first check valve (101 a), and the upstream drainage is continuously drained by means of gravity; if the controller detects that the motor of the first check valve (101 a) is in fault or the first check valve (101 a) is not closed tightly after a closing instruction is made, a pipeline recharging alarm is sent out to prompt that the manual first check valve (101 a) needs to be closed manually.

2. The drainage non-return method for building drainage system as claimed in claim 1, further comprising a vertical pipe (21), a ground branch pipe (22), a basement branch pipe (23) and a basement drainage trunk pipe (24);

the ground branch pipe (22) is arranged in each floor above the ground, the basement branch pipe (23) and the basement drainage main pipe (24) are arranged in the basement, and the ground branch pipe (22) and the basement branch pipe (23) are connected with drainage devices on the floor;

the ground branch pipe (22) and the basement branch pipe (23) are communicated with the vertical pipe (21), after all the branch pipes are connected into the vertical pipe (21), the water outlet of the vertical pipe (21) is connected with the water inlet of the basement drainage main pipe (24), and the water outlet of the basement drainage main pipe (24) is connected with the drainage non-return system (1001).

3. A drainage non-return method for a building drainage system as claimed in claim 1, wherein the riser (21) is located at a safe distance downstream of the drainage non-return system (1001).

4. A drainage non-return method for building drainage systems as claimed in claim 3 wherein the safety distance is greater than 1.5 m.

5. A drainage non-return method for building drainage system as claimed in claim 1, wherein the head of the submersible sewage pump (9) is greater than the distance from the level of the downstream pipeline at the manhole (20) interface to the ground level.

6. A drainage non-return method for building drainage system as claimed in claim 3, wherein the lowest water using appliance drainage is connected to the trunk at a distance of not less than 600mm from the position of the riser (21).

7. A drainage non-return method for building drainage systems according to claim 3, characterized in that the height of the bottom of the pipe at the downstream access manhole of the non-return drainage system is at least 300mm higher than the bottom elevation of the manhole (20).

8. A drainage non-return method for a building drainage system as claimed in claim 3 wherein the submersible sewage pump (9) drains the water block through a pipeline to a downstream interface of the drainage non-return system (1001); or the submersible sewage pump (9) directly discharges the water in the nearest inspection well (20) through a separately laid pipeline.