CN210066942U - Rural outdoor vacuum drainage system - Google Patents

Abstract

The utility model discloses a rural outdoor vacuum drainage system. The system mainly comprises a septic collecting box, a vacuum drainage pipeline, a control valve, a buried vacuum tank and a buried prefabricated vacuum pump station; firstly, the flow state conversion function of the vacuum collecting box is combined with the function of intercepting the septic tank of the traditional household septic tank, so that large dirt is prevented from entering a pipe network, and the problem that the pipeline is easy to block can be effectively solved; meanwhile, the form of the vacuum pump station is changed from the traditional overground and underground type to a buried prefabricated pump station, so that the relevant regulations of agricultural land use can be met, and the construction period and steps are shortened and simplified; in addition, the deodorization biological filter arranged at the outlet of the exhaust pipe of the vacuum pump is changed into an ozone deodorization device arranged in a vacuum pump station, so that the defects that the biological filter is greatly influenced by the environment, the later maintenance workload is large, the biological filter cannot intermittently run, the management operation needs professionals and the like are overcome, and the occupied area is saved.

Description

Rural outdoor vacuum drainage system

Technical Field

The utility model is suitable for a rural outdoor vacuum drainage field is applicable to the construction cycle short, drainage point dispersion, drainage distance long, the relief is flat, the street is narrow, need stride across obstacles such as river system and pipeline, pipeline buried depth big, groundwater level is high, population density is low, occasions such as water source protected area, can be used to replace traditional outdoor gravity drainage system and current outdoor vacuum drainage system, especially relates to a rural outdoor vacuum drainage system.

Background

With the vigorous promotion of new rural construction and beautiful rural construction in recent years by the country, the rural sewage collection and treatment related to the rural water environment treatment are supported by the national and local emphasis and developed rapidly, and the rural sewage pipe networking becomes a trend; a small number of villages which are close to urban areas and towns and meet the access conditions of the town sewage collection pipe network are brought into the sewage pipe network systems of the urban areas and the towns, and are treated in a centralized manner by a town sewage treatment plant; most villages currently employ a distributed collection processing model.

The rural domestic sewage comprises the drainage of washing, bathing, kitchen cooking, excrement and flushing and the like, and has the characteristics of wide and dispersed surface, multiple sources, quick growth, complex sewage components and large change of water quality and water quantity. A typical rural sewage collection and treatment system generally consists of a sewage network system (a user's house outlet pipe, a user's three-or two-grid septic tank, a sewage network, an intermediate lift pump station) and terminal treatment facilities.

Currently, a gravity drainage system is generally adopted in a rural sewage pipe network system, and drainage basins are divided and sewage pipe networks are distributed according to the vertical elevation of villages, the distribution of natural water systems and the distribution of residents and in combination with the condition of drainage water outlets; the investment of the sewage pipe network system accounts for 70-80% of the total investment of the rural sewage collecting and treating system.

The current rural sewage gravity drainage system generally has the following problems:

1. the system is greatly influenced by a water system and barriers, a plurality of drainage basins are generally naturally divided according to the water system, and a water collecting pipe network and a treatment facility are respectively arranged, so that the initial investment cost is obviously increased when the number of sewage treatment stations is increased, and troubles are brought to the operation management of the sewage treatment stations.

2. Village drainage is usually large in drainage basin, a trunk pipe is long, flow is small, the minimum gradient of a common drainage pipe diameter de200/300 is 0.004/0.002, the average buried depth of a gravity system pipeline in a flat area is about 2-2.5 m, and the buried depth in front of a terminal treatment station can reach 3-5 m; the groove is deep, precipitation construction is needed when the groove meets underground water, and a supporting pile is used for enclosing, so that the construction cost is high; rural sewage pipe network construction is because of the ditch groove is too deep every year, and the supporting measure is improper, appears the casualties accident after the collapse.

3. Inspection wells are required to be arranged between the gravity drainage system pipelines for connection, so that the width of the groove is increased; on the other hand, the manhole cover with the vent holes in the rural road environment can often enter various foreign matters to be deposited in the manhole, so that the clogging is increased; simultaneously, the exhausted odor and the bred mosquitoes and flies pollute the surrounding environment through the vent holes.

4. When the gravity drainage pipeline with large buried depth passes through a rural street with the net width of 2-4 m, the shallow foundation of the farm house is threatened greatly by the deep trench excavation, and the collapse of the farm house and the enclosing wall on the ground is easily caused.

5. Because the investment cost of the sewage pipe network system is high, the construction unit always reduces the cost by sacrificing the drainage gradient and strives for profit; when the drainage gradient is smaller than the lowest gradient of the pipeline, the pipe network is easy to be silted up, and the maintenance and the management are difficult.

6. The gravity drainage system adopts spigot and socket joints between pipelines and between the pipelines and the inspection well, has higher water leakage rate and threatens the water quality safety of underground water.

The vacuum drainage system is a drainage system which utilizes vacuum equipment to generate certain vacuum degree in a drainage pipeline and utilizes air pressure difference to convey media; the system is suitable for occasions with dispersed drainage points, longer drainage distance, flat terrain, need of crossing barriers, high underground water level, low population density, water source protection areas and the like.

Vacuum drainage systems were generated in the 60 th 19 th century to the 60 th 20 th century. The vacuum drainage system was proposed by Charles t.liemur in 1867, the negative pressure of the system was generated by a steam engine driving a vacuum pump, and a vacuum pipe of cast iron was used; in 1873, amsterdam built the first set of vacuum drainage system in the world and then was used in europe cities such as paris, berlin, etc., and in 1905, amsterdam used thousands of toilets with vacuum drainage; in 1956, the swedish engineer Joel liljenhal utility model a vacuum connection valve arrangement in a vacuum system.

In the 60 th of 20 th century to the 90 th of 20 th century, the vacuum drainage technology enters the development and maturity stages. The U.S. environmental protection agency breaks through two most critical problems in an outdoor vacuum drainage sewage collection system, namely vacuum interface valves and vacuum pipeline conveying; in 1978, Pasawang-Lottuger built the first ROEVAC vacuum drainage system and first applied it to the disposal of hospital radiology department waste water in 1980. By the 90 s of the 20 th century, vacuum drainage technology has reached the maturity of scale application in europe and america, but needs to be further improved.

From the 90 s of the 20 th century to the present, the vacuum drainage technology is always perfected and optimized. Countries represented by japan and usa have improved reliability of the system, system energy saving, equipment integration, and the like by improving key components in the vacuum drainage system and adopting modern monitoring means. So far, the vacuum drainage system has the basic characteristics of reliability, controllability, standardization, informatization, economy, feasibility and environmental friendliness, and meets the basic requirements of being a modern drainage system.

By introducing, digesting and absorbing foreign vacuum drainage technologies, vacuum drainage has been first applied to the fields of railways (such as a railway passenger car vacuum excrement collecting device and a Jinghushi high-speed railway ground sewage discharge system), buildings (such as a smoke stand culture center indoor vacuum drainage system and a Guangzhou Baiyun International conference center vacuum drainage system), municipalities (such as a riparian zone vacuum sewage interception project and a Jinan youth road rainwater emergency vacuum drainage system), ships (such as a new century cruise ship vacuum excrement collecting system and a Xuelong number polar exploration ship vacuum excrement collecting system), aviation (such as an MD-11 airplane airborne vacuum sewage discharge system DLV-1 type airborne vacuum sewage discharge system) and the like in China.

In 2012, the China Association for engineering construction standards published a recommended standard CECS316:2012 engineering Specification for outdoor vacuum drainage systems, which provides a basis for standardizing the design and installation of outdoor vacuum drainage systems. The existing outdoor vacuum drainage system in China refers to the relevant requirements of European standards; the length of a vacuum main pipe of a single vacuum pump station is less than or equal to 4 Km; the accumulated climbing height of the vacuum drainage main pipe is less than or equal to 5m (the maximum value of the accumulated height is corrected according to the local altitude); a finished product collecting box is arranged between the indoor gravity pipeline and the outdoor vacuum pipeline to convert gravity and vacuum flow state; the vacuum pipeline adopts a zigzag or bag-shaped laying mode, the minimum gradient of the vacuum pipeline between lifting bends or U-shaped bends is 0.002, and the distance between the lifting bends is 6-100 m; an inspection pipe leading to the ground is arranged at each lifting bend or U-shaped pipe; the water is drained without the gravity gradient, and the water is allowed to be conveyed along the slope; each vacuum drainage system is provided with 1 vacuum tank, and the vacuum drainage system can be buried outside a vacuum pump station or arranged in the vacuum pump station; the vacuum pump station building consists of an overground part and an underground part, the underground part is provided with a vacuum tank, a drainage pump (1 for 1) and a vacuum pump (1 for 1), and the overground part is provided with a power distribution cabinet and a control cabinet; the water outlet of the drainage pump is connected with a sewage treatment facility or a municipal sewage pipe network; the exhaust pipe of the vacuum pump is discharged after being deodorized by an outdoor deodorization biological filter; the vacuum pump station adopts double power sources or double loops for power supply.

The outdoor vacuum drainage system has the advantages that the pipe diameter is small (de80-200), the buried depth is shallow (0.7-1.1 m), the groove is narrow, an inspection well is not needed to be arranged, precipitation construction is not needed, a supporting pile is not needed to be arranged in the groove, the drainage system is not influenced by a river channel and an obstacle, the number of sewage treatment stations is small, construction is convenient and rapid, and the construction period is short, and the investment cost of a sewage pipe network system is greatly reduced compared with a gravity drainage system; meanwhile, the vacuum drainage system is totally closed without leakage and odor overflow, and the sanitary condition is superior to the gravity system; in addition, the flow rate of the vacuum drainage system is high, the pipe network is not easy to be silted up, and the later maintenance cost of the pipe network is lower than that of a gravity system; because the pipeline groove is shallow, the casualty accidents and the collapse of the farm house building are also avoided; in summary, the outdoor vacuum drainage system has obvious comprehensive advantages when being used for replacing an outdoor gravity drainage system.

When the existing outdoor vacuum drainage system is used in rural areas, the following problems need to be solved:

1. when a gravity drainage system is adopted in rural areas, 1 septic tank is arranged on a household outlet pipe of each household, large sewage and excrement can be intercepted by the septic tanks (farmers can clean the septic tanks by themselves), and the septic tanks are very simple and effective measures for preventing a sewage pipe network from being blocked; the volume of a sewage collecting chamber of a sewage collecting box arranged between a household outlet pipe and a sewage main pipe of a peasant household of the conventional outdoor vacuum drainage system is too small, so that large dirt and excrement cannot be effectively intercepted, and the peasant household is not convenient to clean.

2. According to the regulations of the national soil resource bureau, the vacuum pump station and the sewage treatment station are required to select the site without occupying cultivated land and agricultural land, and the basic construction land is adopted as much as possible; at present, the available basic construction land in rural areas is rare, agricultural land needs to be occupied in most occasions, and buildings above the ground of the agricultural land belong to illegal buildings as long as the buildings exist, so that the vacuum pump station cannot be built on the ground and can only be made into a full underground structure.

3. The technical regulation of outdoor vacuum drainage system engineering (CECS316:2012) recommends that the deodorization biological filter is used for treating the exhaust gas of the vacuum pump, so that the floor area is large, the pollutants intercepted from the exhaust gas are attached to an open filter material layer to cause secondary pollution to the environment, mosquitoes and flies are easy to breed, in addition, the biological filter also has the defects of large environmental influence (particularly in winter in the north), large later-period maintenance workload, non-intermittent operation, professional personnel requirement for management and operation and the like.

In summary, although the outdoor vacuum drainage system is superior to the gravity drainage system, the three most central parts of the system need to be improved greatly to be suitable for the construction of the rural sewage pipe network system.

SUMMERY OF THE UTILITY MODEL

To the technical problem that exists among the above-mentioned prior art, the utility model aims at providing a rural outdoor vacuum drainage system.

In order to realize the purpose of the utility model, the utility model provides a rural outdoor vacuum drainage system, include: a septic collecting box, a vacuum drainage pipeline, a control valve, a buried vacuum tank and a buried prefabricated vacuum pump station,

the farmer indoor gravity drainage system is drained to a septic collecting box outside each farmer room through a gravity household outlet pipe to carry out solid-liquid separation; the top-extending vent pipe is arranged on the gravity drainage pipeline in the farmer room; the septic collecting box is connected with the buried vacuum tank through a vacuum drainage pipeline and a control valve, and the buried vacuum tank is connected with the buried prefabricated vacuum pump station.

And a third inspection well is arranged between the septic collecting box and the gravity household outlet pipe.

The septic collecting box is used for a converter for gravity drainage and vacuum drainage and is also used for a holding container for holding excrement and large sediments with a certain volume; according to whether the cabin where the vacuum valve is located is combined with the excrement storage space or not, the method is divided into two independent schemes:

the first method comprises the following steps: the septic collecting box comprises an upper valve chamber and a lower excrement collecting space, and the upper valve chamber and the lower excrement collecting space adopt an integrated structure; wherein, the excrement interception space at the lower part is divided into three divisions, namely a first division, a second division and a third division, and the volumes of the three divisions are respectively 50%, 25% and 25%; the first two lattices, the first lattice and the second lattice, have the function of intercepting and storing large dirt and excrement; the third grid collects relatively clean sewage as a sewage suction groove for sucking sewage by a vacuum pipeline; a space-independent valve chamber is arranged above the sewage suction tank, and a vacuum valve, a controller, an upper port of an induction pipe, a pressure transmitter and a connecting pipeline including a pneumatic pipeline are arranged in the valve chamber; the vacuum sewage suction pipe and the induction pipe penetrate through the bottom of the valve chamber and extend into the bottom of the sewage suction tank with the third cell distance of 0.05-0.1 m;

the three partitions in the lower space of the septic collecting box are communicated with each other through holes, wherein the distance between the top of the first partition board and the top plate is not less than 0.1m, and the height of the top of the second partition board is not less than 0.05m lower than the height of the bottom of the gravity drainage service pipe; more than 0.5m from the bottom of the box of the first partition board is provided with at least 2 water passing holes; a first inspection well communicated with the ground is arranged at the top of the first grid, and a second inspection well communicated with the ground is arranged at the top between the second grid and the third grid; the valve chamber and the well cover and the well seat of the inspection well adopt heavy protective well covers and well seats; wherein, the well cover of the valve chamber is sealed and is not provided with a vent hole; the thickness of the covering soil of the septic collecting box is not less than 0.3 m; the integral septic collecting box is made of glass fiber reinforced plastic or PE which is corrosion-resistant and convenient to construct;

when the sewage and wastewater is discharged into the first two lattices of the septic collecting box, solid matters with higher specific gravity and parasitic ova are precipitated to the bottom of the tank, the sewage and wastewater after fermentation and decomposition is divided into pasty floating skins and clear sewage and wastewater-like solid waste residues, and the sewage and wastewater after the second lattice treatment is further harmless; the waste liquid flowing into the third compartment is generally decomposed; the sewage and wastewater flowing into the third grid are temporarily stored in the sewage suction tank, the change of water pressure is transmitted to the controller through the induction pipe, when the sewage amount reaches a preset volume, the controller controls the vacuum valve to be switched from a closed state to an open state, the sewage in the sewage suction tank is communicated with the vacuum pipeline, the sewage is sucked into the vacuum pipeline, after a certain amount of sewage and air are sucked, the liquid level of the sewage suction tank descends, and the vacuum valve automatically resets; the opening duration of the vacuum valve and the flow rate of the gas-liquid mixed liquid can be adjusted by the controller; the sewage and the waste water treated by the septic collecting box complete the solid-liquid separation process, the solid waste residues are retained in the front two grids of the septic collecting box, and the sewage and the waste gas are discharged into a vacuum pipeline and finally discharged into a vacuum tank.

And the second method comprises the following steps: the septic collecting box comprises a valve box at the upper part and a feces intercepting and storing space at the lower part, the valve box and the feces intercepting and storing space are separately arranged, and the vacuum valve is arranged in an independent valve box;

the vacuum sewage suction pipe and the induction pipe penetrate through the bottom of the valve box and extend into the sewage suction groove from the position, 0.1m away from the bottom, of the side wall of the third grid of the excrement intercepting and storing space; a pressure probe of the pressure transmitter extends into the bottom of the sewage suction tank from a pressure probe interface at the top of the third grid and is fixedly installed; the pressure transmitter is arranged in the valve box; the box cover is sealed and is not provided with a vent hole; when the top cover is arranged on a hardened ground, a heavy protection well cover and a well seat are additionally arranged on the plastic top cover of the valve box;

wherein, the excrement interception space at the lower part is divided into three divisions, namely a first division, a second division and a third division, and the volumes of the three divisions are respectively 50%, 25% and 25%; the first two lattices, the first lattice and the second lattice, have the function of intercepting and storing large dirt and excrement; the third grid collects relatively clean sewage as a sewage suction groove for sucking sewage by a vacuum pipeline;

the three partitions in the lower space of the septic collecting box are communicated with each other through holes, wherein the distance between the top of the first partition board and the top plate is not less than 0.1m, and the height of the top of the second partition board is not less than 0.05m lower than the height of the bottom of the gravity drainage service pipe; more than 0.5m from the bottom of the box of the first partition board is provided with at least 2 water passing holes; a first inspection well communicated with the ground is arranged at the top of the first grid, and a second inspection well communicated with the ground is arranged at the top between the second grid and the third grid; the manhole cover and the manhole seat of the inspection well adopt heavy protective manhole covers and manhole seats; the thickness of the covering soil of the septic collecting box is not less than 0.3 m; the integral septic collecting box is made of glass fiber reinforced plastic or PE which is corrosion-resistant and convenient to construct;

when the sewage and wastewater is discharged into the first two lattices of the septic collecting box, solid matters with higher specific gravity and parasitic ova are precipitated to the bottom of the tank, the sewage and wastewater after fermentation and decomposition is divided into pasty floating skins and clear sewage and wastewater-like solid waste residues, and the sewage and wastewater after the second lattice treatment is further harmless; the waste liquid flowing into the third compartment is generally decomposed; the sewage and wastewater flowing into the third grid are temporarily stored in the sewage suction tank, the change of water pressure is transmitted to the controller through the induction pipe, when the sewage amount reaches a preset volume, the controller controls the vacuum valve to be switched from a closed state to an open state, the sewage in the sewage suction tank is communicated with the vacuum pipeline, the sewage is sucked into the vacuum pipeline, after a certain amount of sewage and air are sucked, the liquid level of the sewage suction tank descends, and the vacuum valve automatically resets; the opening duration of the vacuum valve and the flow rate of the gas-liquid mixed liquid can be adjusted by the controller; the sewage and the waste water treated by the septic collecting box complete the solid-liquid separation process, the solid waste residues are retained in the front two grids of the septic collecting box, and the sewage and the waste gas are discharged into a vacuum pipeline and finally discharged into a vacuum tank.

The pipeline of the vacuum drainage system comprises a vacuum drainage pipe, a vacuum drainage branch pipe, a vacuum drainage main pipe and a first inspection pipe; the vacuum pipeline adopts a zigzag or bag-shaped laying mode, the minimum gradient of the vacuum pipeline between lifting bends or U-shaped bends is 0.002, and the distance between the lifting bends of the zigzag laying mode is 6-100 m; the drainage does not need gravity gradient, the pipeline is allowed to run along the slope and is conveyed upwards, and a U-shaped bend is arranged in front of a 45-degree ascending section when the pipeline continuously climbs the slope; an inspection pipe leading to the ground is arranged at each lifting bend or U-shaped pipe; the flow speed of the vacuum pipeline is controlled to be 3-7 m/s.

Wherein the vacuum pipeline adopts a high-density polyethylene pipe and a homogeneous pipe fitting, and is connected by electric melting; or a hard polyvinyl chloride pipe and a homogeneous pipe fitting are adopted for bonding; when the branch pipe of the vacuum pipeline is connected to the main pipe and the length of the straight pipeline is more than 400m, a maintenance valve is arranged.

Wherein, the pressure in the buried vacuum tank is maintained between-0.06 MPa and-0.07 MPa, and the pressure bearing capacity of the tank body is not less than-0.095 MPa; the highest liquid level in the buried vacuum tank should not exceed 1/2 which is the effective height of the tank body.

The underground prefabricated vacuum pump station is arranged close to a sewage treatment station or at the central position of a vacuum drainage system; adopt and bury formula integral structure, establish vacuum pump, drain pump, stealthily dirty pump, ozone deodorizing device in, distribution cabinet and switch board are established on the outer ground of pump station, the vacuum pump inhales deodorizing device with burying the gas in the formula vacuum tank and handles the back emission, the drain pump is discharged sewage waste water to sewage treatment station or municipal sewage pipeline, accomplishes gas-liquid separation's process in vacuum pump station.

Wherein, the vacuum pump is two or more than two rotary vane vacuum pumps with the same operation capability, low noise and high efficiency, one of which is a standby pump; the vacuum pump air inlet pipe is connected with the top of the buried vacuum tank, and the vacuum pump air outlet pipe is connected with the ozone deodorization device.

Wherein, the drainage pump is two or more than two centrifugal drainage pumps with the same type, low noise dry installation and cutting function, and is provided with a standby pump; the drainage pump is connected with the bottom of the buried vacuum tank, and the drainage capacity of the drainage pump meets the drainage requirement of the vacuum tank.

The underground prefabricated vacuum pump station is characterized in that a sump is arranged in the underground prefabricated vacuum pump station and used for collecting a small amount of water leaked from a pipeline, 1 submersible sewage pump is arranged in the sump, and a special sewage check valve and a gate valve are arranged on a water outlet pipe of the submersible sewage pump; the drain pipe of the submersible sewage pump is merged with the drain pipe of the drain pump and then discharged outdoors.

Compared with the prior art, the utility model has the beneficial effects that the utility model relates to an outdoor vacuum drainage system of domestic sewage meeting the rural use conditions, which solves the problems of the outdoor gravity drainage system commonly adopted in the rural areas, such as deep burial depth, large pipe diameter, high manufacturing cost, easy blockage, easy leakage, complex construction, long construction period, difficult maintenance, poor environmental sanitation conditions, more sewage stations, difficult management and the like; on the basis of retaining the existing vacuum pipeline laying mode, maintaining the advantages and the basis of small pipe diameter, shallow burying depth, no leakage, no influence on the surrounding environment, convenient and quick construction, short construction period and long conveying distance of the existing outdoor vacuum drainage system, firstly, the flow state conversion function of a collecting box in the existing system is combined with the function of intercepting the septic tank of a traditional household septic tank, so that the gas-liquid-solid three-phase separation of sewage is realized, the large pollutant is prevented from entering a pipe network, and the problem of vacuum pipeline blockage can be effectively avoided; meanwhile, the form of the vacuum pump station is changed from the traditional overground and underground type to a buried prefabricated pump station, so that the relevant regulations of agricultural land use can be met, and the construction period and steps are shortened and simplified; in addition, the deodorization biological filter arranged at the outlet of the exhaust pipe of the vacuum pump is changed into an ozone deodorization device arranged in a vacuum pump station, so that the defects that the biological filter is greatly influenced by the environment, the later maintenance workload is large, the biological filter cannot intermittently run, the management operation needs professionals and the like are overcome, the operation is simpler and more convenient, the treatment effect is more stable, and the occupied area is saved.

Drawings

FIG. 1 is a schematic structural view of a rural outdoor vacuum drainage system according to the present application;

FIG. 2 is a schematic structural view of a first embodiment of the septic tank of the present application;

FIG. 3 is a schematic structural view of a second embodiment of the septic tank of the present application;

FIG. 4 is a schematic structural diagram of the buried prefabricated vacuum pump station according to the present application;

in the figure, 1-a vent pipe, 2-a gravity outlet pipe, 3-a third inspection well, 4-a septic collecting box, 5-a vacuum discharge pipe, 6-a vacuum discharge main pipe, 7-a vacuum discharge branch pipe, 8-a lifting bend, 9-a first inspection pipe, 10-an inspection hole, 11-a second inspection pipe, 12-a buried vacuum tank, 13-an exhaust pipe, 14-a buried prefabricated vacuum pump station, 15-a pressure drain pipe, 16-a terrace, 17-a control cabinet, 18-a power distribution cabinet, 19-a foundation and 20-a vacuum tank pressure transmitter interface,

41-a first inspection well, 42-a first inspection well cover, 43-a second inspection well, 44-a second inspection well cover, 45-a feces storage space, 46-a valve chamber, 47-a valve chamber cover, 48-a controller, 49-a vacuum valve, 410-a monitoring line interface, 411-a vacuum discharge pipe, 412-a pressure transmitter interface, 413-a sensing pipe,

141-submersible sewage pump, 142-sump pit, 143-check valve, 144-gate valve, 145-rotor flowmeter, 146-ozone generator, 147-stop valve, 148-manhole, 149-exhaust pipe, 1410-unpowered hood, 1411-pressure sensor, 1412-channel steel base, 1413-exhaust pipe and 1414-vacuum meter.

Detailed Description

The present invention will be described in further detail with reference to the following drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

As shown in fig. 1-4, the utility model relates to an outdoor domestic sewage vacuum drainage system meeting the use conditions of rural areas, which solves the problems of the outdoor gravity drainage system commonly adopted in the rural areas, such as deep burial depth, large pipe diameter, high manufacturing cost, easy blockage, easy leakage, complex construction, long construction period, difficult maintenance, poor environmental sanitation conditions, more sewage stations, difficult management and the like; on the basis of retaining the existing vacuum pipeline laying mode, maintaining the advantages and the basis of small pipe diameter, shallow burying depth, no leakage, no influence on the surrounding environment, convenient and quick construction, short construction period and long conveying distance of the existing outdoor vacuum drainage system, firstly, the flow state conversion function of a collecting box in the existing system is combined with the function of intercepting the septic tank of a traditional household septic tank, so that the gas-liquid-solid three-phase separation of sewage is realized, the large pollutant is prevented from entering a pipe network, and the problem of vacuum pipeline blockage can be effectively avoided; meanwhile, the form of the vacuum pump station is changed from the traditional overground and underground type to a buried prefabricated pump station, so that the relevant regulations of agricultural land use can be met, and the construction period and steps are shortened and simplified; in addition, the deodorization biological filter arranged at the outlet of the exhaust pipe of the vacuum pump is changed into an ozone deodorization device arranged in a vacuum pump station, so that the defects that the biological filter is greatly influenced by the environment, the later maintenance workload is large, the biological filter cannot intermittently run, the management operation needs professionals and the like are overcome, the operation is simpler and more convenient, the treatment effect is more stable, and the occupied area is saved.

The utility model discloses a septic collecting box 4, vacuum drainage pipe and control flap, bury formula vacuum tank 12, bury formula prefabricated vacuum pump station 14 (including vacuum pump, drain pump, stealthily dirty pump 141, ozone deodorizing device, outdoor switch board 18 and switch board 17) and constitute, its main flow is: the farmer indoor gravity drainage system is drained into a septic collecting box 4 outside each farmer room through a gravity household outlet pipe 2 for solid-liquid separation (sludge sediment is regularly cleared by the farmer or a specially-assigned person); the top-extending vent pipe 1 arranged on the indoor gravity drainage pipeline is beneficial to the balance of the air pressure in the septic collecting box 4, so that the vacuum valve 49 works normally and can replace the air inlet pipe of the existing finished product collecting box; a third inspection well 3 can be additionally arranged between the septic collecting box 4 and the gravity outlet pipe 2 for connection if more connecting pipes or unsmooth connecting pipes exist; when the sewage in a third cell connecting a vacuum water suction pipe and a vacuum valve in the septic collecting box 4 reaches a preset volume, the water pressure of the induction pipe activates the pneumatic controller, the vacuum valve 49 is opened by the controller, and the sewage in the third cell (sewage suction groove) is quickly discharged under the combined action of the external atmospheric pressure and the vacuum negative pressure in the pipe; a large amount of air enters a vacuum pipeline (the air-water ratio is about 3: 1-15: 1) behind the vacuum valve 49 along with the sewage, and the sewage is pushed to be conveyed to the buried vacuum tank 12 along the pipeline; when the water level in the buried vacuum tank 12 reaches a certain height, a drainage pump arranged in a buried prefabricated vacuum pump station 14 is automatically started to drain sewage in the tank to a sewage treatment station or a municipal sewage pipe network, and the pump is automatically stopped when the water level reaches a preset low water level; an air suction pipe of a vacuum pump arranged in a buried prefabricated vacuum pump station 14 is connected to the top of a buried vacuum tank 12, and the vacuum pump is automatically started and stopped through a pressure sensor on the air suction pipe according to the vacuum degree in the tank so as to maintain the vacuum pressure in the tank between-0.06 MPa and-0.07 MPa; the vacuum pump and the drainage pump are not started at the same time; the ozone generated by the ozone generator 146 is mixed and reacted with the gas exhausted by the vacuum pump in the ejector through the rotor flow meter and then exhausted to the outside; design calculations for the system are performed with reference to CECS316: 2012;

firstly, a septic collecting box:

the septic collecting box 4 is an important component of an outdoor vacuum drainage system, is not only a converter for gravity drainage and vacuum drainage, but also a holding container for holding excrement and large sediments with a certain volume; the two independent schemes are adopted according to whether the cabin where the vacuum valve is located is combined with the excrement storage space or not.

Scheme 1

As shown in fig. 2, the upper valve chamber 46 and the lower stool-reserving space 45 are integrally formed; the lower part of the septic collecting box 4 is divided into three grids, namely a first grid, a second grid and a third grid, wherein the volumes of the three grids are respectively 50%, 25% and 25%; the first two lattices have the function of intercepting and storing large dirt and excrement, and the total effective volume is about 1 cubic meter; the third grid collects relatively clean sewage as a sewage suction groove for sucking sewage by a vacuum pipeline; a valve chamber 46 which is independent in space is arranged above the sewage suction tank, and a vacuum valve 49, a controller 48, an upper port of an induction pipe 413, a pressure transmitter interface 412 and a connecting pipeline comprising a pneumatic pipeline are arranged in the valve chamber 46; the vacuum sewage suction pipe and the induction pipe 413 penetrate through the bottom of the valve chamber 47 and extend into the position of the grid 3, 0.05-0.1 m away from the bottom of the sewage suction tank.

Holes are communicated among the three partitions in the lower space of the septic collecting box 4, wherein the distance between the top of the first partition plate and the top plate is not less than 0.1m, and the height of the top of the second partition plate is not less than 0.05m lower than the height of the bottom of the gravity drainage household pipe; the first partition board is provided with at least 2 water passing holes (the size is not less than 0.1x0.1m) which are more than 0.5m away from the bottom of the box. A first inspection well 41 communicated with the ground is arranged at the top of the first grid, and a second inspection well 43 communicated with the ground is arranged at the top between the second grid and the third grid; the valve chamber and the well cover and the well seat of the inspection well adopt heavy protective well covers and well seats; wherein, the well cover of the valve chamber is sealed and is not provided with a vent hole; the thickness of the covering soil of the septic collecting box 4 is not less than 0.3 m; the integral septic collecting box 4 is made of corrosion-resistant and convenient-to-construct glass fiber reinforced plastics or PE materials, the structural requirements of the septic collecting box refer to the technical requirements of glass fiber reinforced plastics septic tanks (CJ/T409-2012) of the industry standard, and the shape of the septic collecting box is rectangular or oval.

The working principle of the septic collecting box 4 is precipitation-decomposition-separation; when the sewage and wastewater is discharged into the first two lattices of the septic collecting box 4, solid matters with higher specific gravity, parasitic ova and the like are precipitated to the bottom of the tank, the sewage and wastewater after fermentation and decomposition is divided into pasty floating skins and clear sewage and wastewater liquid solid waste residues, and the sewage and wastewater after the second lattice treatment is further harmless; the waste liquid flowing into the third division is decomposed generally, germs and parasite eggs in the waste liquid are basically killed, and the sewage and the waste water are basically harmless; sewage and wastewater flowing into the third cell are temporarily stored in the sewage suction tank, the change of water pressure (water level) is transmitted to the controller 48 through the induction pipe, when the sewage amount reaches a preset volume, the controller 48 controls the vacuum valve 49 to be switched from a closed state to an open state, the sewage in the sewage suction tank is communicated with the vacuum pipeline, the sewage is sucked into the vacuum pipeline, after a certain amount of sewage and air are sucked, the liquid level of the sewage suction tank is reduced, and the vacuum valve 49 is automatically reset; the opening duration of the vacuum valve 49 and the flow rate of the gas-liquid mixed liquid can be adjusted by the controller 48; the system adopts a field bus network to monitor the opening state of a vacuum valve 49 in the collecting box and the signal of the sewage ultrahigh liquid level state of the sewage suction tank so as to ensure the normal operation of the system; the sewage and the waste water treated by the septic collecting box 4 complete the solid-liquid separation process, the solid waste residues are retained in the front two grids of the septic collecting box, and the sewage and the waste gas are discharged into the vacuum pipeline and finally discharged into the buried vacuum tank 12.

Sludge deposited at the bottom of the tank needs to be timely cleaned so as to prevent sediment and sludge from entering a sewage suction groove and influencing the operation of a vacuum drainage system; the sludge cleaning period is 3-6 months.

The vacuum valve 49 is an important device in the vacuum drainage system, and is an interface valve for isolating a vacuum state from an atmospheric state in the vacuum drainage system; the vacuum valve 49, the matched controller 48 and the pneumatic pipeline are purchased to obtain finished products; the vacuum valve 49 adopts a corrosion-resistant negative pressure pneumatic diaphragm type vacuum valve or a piston angle seat valve; the opening and closing of the valve is controlled by vacuum pneumatics, the sewage level is transmitted by an induction pipe, the action pressure is preferably-1.25 to-2 kPa (is not preferably greater than-0.15 KPa), and the opening time range is 3 to 10 s; the drift diameter of the valve is 75mm, and the material is ABS; a manual button is arranged, and the vacuum valve 49 can be opened through manual control; a check valve 143 is provided on the hose connecting the vacuum port to the controller 48 to prevent moisture from entering the controller from the vacuum line.

In order to conveniently check the working times of the vacuum valve 49, 6 working counts are arranged in the transparent observation window at the bonnet, a non-contact valve position switch is arranged at the bonnet, and the state of the vacuum valve is transmitted to a monitoring system through a signal cable.

The high liquid level alarm device adopts a pressure transmitter, and a pressure probe extends into the bottom of the sewage suction tank through a pressure transmitter interface at the bottom of the valve chamber and is fixedly installed; when the liquid level in the collecting box reaches the alarm liquid level, a high liquid level alarm signal is transmitted to the monitoring system.

A valve chamber of the septic collecting box is provided with a real-time monitoring system for monitoring the opening state and the high alarm liquid level of the vacuum valve and finally displaying the opening state and the high alarm liquid level in a control cabinet of the vacuum pump station; the side wall of the valve chamber is provided with an alarm monitoring line interface, and monitoring cables of the vacuum valve and the liquid level alarm device are connected with a system monitoring cable which is laid along with the vacuum pipeline in a common groove so as to be buried uniformly.

The vacuum suction pipe and the induction pipe 413 can be made of corrosion-resistant materials such as Polyethylene (PE), polyvinyl chloride (PVC) and the like.

Scheme 2

As shown in fig. 3, the valve chamber 46 is provided separately from the stool-reserving space 45, and the vacuum valve 49 is provided in a separate valve housing;

the vacuum sewage suction pipe and the induction pipe 413 penetrate through the bottom of the valve box and extend into the sewage suction groove from the position, 0.1m away from the bottom, of the side wall of the third grid of the septic collecting box; a pressure probe of the pressure transmitter extends into the bottom of the sewage suction tank from a pressure probe interface at the top of the third grid and is fixedly installed; the pressure transmitter is arranged in the valve box; the valve box and the box cover can be made of Polyethylene (PE), polyvinyl chloride (PVC) or synthetic materials; the box cover is sealed and is not provided with a vent hole; when the top cover is arranged on a hardened ground, the heavy protection well cover and the well seat are additionally arranged on the plastic top cover of the valve box.

The rest of the protocol is the same as scheme 1.

II, vacuum drainage pipeline and control valve:

the pipeline of the vacuum drainage system consists of a vacuum drainage pipe 5, a vacuum drainage branch pipe 7, a vacuum drainage main pipe 6 and an inspection pipe; the vacuum pipeline adopts a zigzag or bag-shaped laying mode, the minimum gradient of the vacuum pipeline between lifting bends or U-shaped bends is 0.002, and the distance between the lifting bends in the zigzag laying mode is 6-100 m; the drainage does not need gravity gradient, the pipeline is allowed to run along the slope and is conveyed upwards, and a U-shaped bend is arranged in front of a 45-degree ascending section when the pipeline continuously climbs the slope; an inspection pipe leading to the ground is arranged at each lifting bend or U-shaped pipe; the flow speed of the vacuum pipeline is controlled to be 3-7 m/s.

The pipeline adopts High Density Polyethylene (HDPE) pipes and homogeneous pipe fittings, and is connected by electric melting; or a hard polyvinyl chloride (PVC-U) pipe and a homogeneous pipe fitting are adopted for bonding; the nominal pressure of the pipeline is not less than 1 MPa; the pipeline construction installation is according to the industry standard & lt & ltburied polyethylene water supply pipeline engineering technical code & gt CJJ101 & lt & gt CECS17 & lt & gt technical code & gt CECS17 & lt & gt.

When the vacuum drainage branch pipe 7 is connected to the vacuum drainage main pipe 6 and the length of the straight pipeline is more than 400m, the vacuum pipeline is provided with an inspection valve; the valve adopts a maintenance-free direct-buried gate with a corrosion-resistant inner wall, and the nominal pressure of the valve is not less than 1 MPa.

Thirdly, burying a vacuum tank:

the pressure in the buried vacuum tank 12 is maintained within-0.06 to-0.07 MPa, and the pressure bearing capacity of the tank body is not less than-0.095 MPa; the highest liquid level in the buried vacuum tank 12 should not exceed 1/2, and when the highest liquid level is exceeded, the liquid level control signal in the tank should automatically turn off the vacuum pump and give an alarm; the side wall of the tank is provided with a pressure type liquid level transmitter and 4 liquid level control points (the pump starting and stopping liquid levels of a drainage pump and the ultrahigh and ultralow alarm liquid levels); the vacuum tank is made of carbon steel by welding, the inner wall and the outer wall of the vacuum tank are subjected to anticorrosion treatment (such as epoxy resin coating), and the tank body is rectangular or elliptical in appearance and is horizontally installed; the vacuum tank is provided with an inspection hole on the ground; the thickness of the tank top covering soil is not less than 0.4m, so that the ground can be greened and float resistance can be realized; the design of the vacuum tank needs to consider the influence of buoyancy and is firmly fixed with the foundation; the schematic diagram of the buried vacuum tank and the buried vacuum pump station is shown in figure 4.

Fourthly, burying a prefabricated vacuum pump station:

the buried prefabricated vacuum pump station 14 is the core of an outdoor vacuum drainage system, and the arrangement position of the buried prefabricated vacuum pump station is suitable to be close to a sewage treatment station or the central position of the vacuum drainage system; the buried prefabricated vacuum pump station 14 adopts a buried integrated structure, a vacuum pump, a sewage pump, a submersible sewage pump 141 and an ozone deodorization device are arranged in the buried prefabricated vacuum pump station, and a power distribution cabinet and a control cabinet are arranged on the ground outside the pump station; the vacuum pump sucks the gas in the vacuum tank into the deodorizing device for treatment and then discharges the gas, the drainage pump discharges sewage and wastewater to a sewage treatment station or a municipal sewage pipeline, and the gas-liquid separation process is completed in a vacuum pump station. As shown in fig. 4.

1. Vacuum pump

The vacuum pump adopts a shaping product, and two or more than two rotary vane vacuum pumps with the same operation capacity, low noise and high efficiency are preferably selected, wherein one rotary vane vacuum pump is a standby pump; the air inlet pipe of the vacuum pump is connected with the top of the buried vacuum tank, and the air outlet pipe of the vacuum pump is connected with the deodorization device; the air inlet and outlet pipes of the vacuum pump are provided with control valves and rubber joints; a pressure sensor 1411 is arranged on an air inlet main pipe of the vacuum pump group and linked with a vacuum pump control system, and the vacuum pump is automatically started and stopped according to the vacuum degree; a vacuum meter is arranged on the air outlet main pipe of the vacuum pump set, so that the field maintenance personnel can visually observe the vacuum degree of the system; in order to save the installation space, the vacuum pump is provided with a channel steel frame which is vertically overlapped and assembled.

2. Sewage pump

The sewage pump is preferably selected from two or more centrifugal draining pumps with the same type, low-noise dry installation and cutting function, and is provided with a standby pump; the sewage pump is connected with the bottom of the buried vacuum tank, and the drainage capacity of the sewage pump meets the drainage requirement of the vacuum tank; the sewage pump suction pipe is provided with a rubber joint and a special sewage gate valve, and the water outlet pipe is provided with a rubber joint, a pressure gauge, a special sewage check valve 143 and a gate valve 144; the drainage pump can normally work under the negative pressure of-0.06 MPa to-0.07 MPa; the start and stop of the sewage pump are controlled by a vacuum tank liquid level control device (a pressure transmitter) in a linkage way; the bottom of the drainage pump is provided with a channel steel base 1412 which is connected with the ground of the vacuum pump station.

3. Submersible sewage pump

A small amount of pipelines in the vacuum pump station leak water and flow into the sump 142, and are discharged by 1 submersible sewage pump with the flow rate not less than 0.5L/S and the lift not less than the lift of the drainage pump; a special sewage check valve 143 and a gate valve 144 are arranged on a water outlet pipe of the submersible sewage pump 141; the drain pipe of the submersible sewage pump 141 is merged with the drain pump discharge pipe and then discharged to the outside; the submersible sewage pump 141 is automatically started and stopped by a liquid level control system.

4. Ozone deodorizing device

Ozone has a very strong oxidizing power, and the oxidation-reduction potential of ozone is 2.07V, which is second to fluorine and higher than chlorine and chlorine dioxide. The main components of the odor emitted by the sewage and wastewater discharged from rural areas include sulfur-containing compounds such as hydrogen sulfide, thiols and thioether, amines such as ammonia and amine, alcohols, fats and aldehydes, wherein the hydrogen sulfide and ammonia are the most abundant. The malodorous gas is decomposed into micromolecular substances, water and harmless gas by macromolecular substances under the action of ozone, so that the aim of deodorization is fulfilled.

The ozone deodorization device is arranged in the vacuum pump station and mainly comprises an ozone generator 146, a rotor flow meter 145, a pressure regulating valve and an ejector; conveying the odor and the ozone into the ejector under the action of a vacuum pump and an ozone generator respectively, fully mixing and reacting the odor and the ozone in the ejector, discharging the reacted odorless substances into outdoor air through a pipeline, wherein the outlet of an outdoor exhaust outlet is not less than 0.8m above the ground, the tail end of the outdoor exhaust outlet is provided with a bent pipe, and a pipe orifice is provided with a 20-30-mesh stainless steel net cover for insect prevention; the ozone generator adopts air source and air cooling type equipment, and the ozone generation amount is controlled to be 1-2 g/cubic meter per hour.

5. Pipeline and valve

When the vacuum pipeline and the pressure water drainage pipe adopt galvanized steel pipes, the DN is less than or equal to 80, the vacuum pipeline and the pressure water drainage pipe are connected by adopting a screw joint, and when the DN is greater than 80, the vacuum pipeline and the pressure water drainage pipe are connected by grooves; when the vacuum pipeline and the pressure drain pipe adopt plastic water supply pipes such as ABS, CPVC, PVC-U and the like, the vacuum pipeline and the pressure drain pipe are bonded; the ozone pipe is made of Polybutylene (PB) pipe and is welded in a fusion mode, or is made of S31603 and S31608 thin-wall stainless steel pipes and is welded in a socket mode (during welding, inert gas protection is needed to be arranged at a welding opening).

Valves and accessories on the ozone pipeline should be ozone resistant; the nominal pressure of the valves on the vacuum pipe and the pressure drain pipe is not less than 1 MPa.

6. Power and control requirements

The power supply of the buried prefabricated vacuum pump station adopts a double power supply or a double loop; the drainage pump and the vacuum pump work at different times; the starting and stopping of the ozone generator and the vacuum pump are in linkage control operation; the vacuum pump station can send out a fault signal under the condition of power failure; when the water level in the vacuum tank is ultra-low, the drainage pump or the vacuum pump stops working, the vacuum pump or the drainage pump runs overtime, and the vacuum degree in the vacuum tank is ultra-high or ultra-low, the control system of the pump station can alarm; the control system is equipped with a device monitoring system and a remote monitoring access port.

The outdoor ground of the buried prefabricated vacuum pump station is provided with a rainproof and dustproof control cabinet and a power distribution cabinet with the protection grade not lower than IP 65; the control cabinet and the power distribution cabinet are based on concrete, and the upper skin of the foundation is not less than 0.5m higher than the ground, so that flooding is prevented.

7. Others

The buried prefabricated vacuum pump station is integrally prefabricated in a factory and buried in the field; the thickness of the earth covering on the top plate of the prefabricated pump station is not less than 0.4m, so that the ground can be covered in a greening way and is resistant to floating; the design of the pump station needs to consider the influence of buoyancy and is firmly fixed with the foundation; the manhole 148 of the pump station is not less than 0.5m above the ground, so that flooding is prevented; a stainless steel crawling ladder with the width of 0.4m is arranged at the manhole, so that people can conveniently go in and out; the whole pump station is made of corrosion-resistant glass fiber reinforced plastic or PE materials which are convenient to construct, and the shape of the pump station is rectangular or square; the roof of the pump station is provided with an unpowered hood 1410, and the hood is higher than the ground by not less than 0.7 m.

Other requirements within the vacuum pumping station should be in accordance with the specifications of the outdoor vacuum drainage System technical Specification (CECS316: 2012).

The utility model discloses an outdoor vacuum drainage system who accords with rural service conditions can be used to replace traditional outdoor gravity drainage system and current outdoor vacuum drainage system. The chamber where the vacuum valve is positioned in the utility model can be combined with the excrement storage space or can be arranged separately; the septic collecting box and accessories thereof can adopt more shapes such as a cylinder and more materials such as composite materials, HDPE, stainless steel and the like besides the preferable shape and material; the vacuum valve can adopt other calibers such as 60mm, 90mm and the like besides the preferred calibers; the vacuum valve allows the use of pneumatic-electric valves and electric valves in addition to the pneumatic valves described above; the vacuum tank can adopt a vertical tank in addition to the preferable horizontal tank; the vacuum tank can be made of various materials such as plastic (or composite material) in addition to the above preferred shape and material; the vacuum tank can be arranged in a vacuum pump station besides the preferable buried laying; the prefabricated vacuum pump station can adopt more materials such as composite materials, reinforced concrete and the like and more shapes such as a cylinder shape, a polygon shape and the like besides the preferable materials and shapes; the mixing reactor of the ozone deodorization device can adopt other mixing reaction devices such as a reaction tank, a reactor and the like besides the preferable ejector. Protection is sought for the following claims.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims (10)

1. A rural outdoor vacuum drainage system, characterized in that includes: a septic collecting box, a vacuum drainage pipeline, a control valve, a buried vacuum tank and a buried prefabricated vacuum pump station,

the farmer indoor gravity drainage system is drained to a septic collecting box outside each farmer room through a gravity household outlet pipe to carry out solid-liquid separation; the top-extending vent pipe is arranged on the gravity drainage pipeline in the farmer room; the septic collecting box is connected with the buried vacuum tank through a vacuum drainage pipeline and a control valve, and the buried vacuum tank is connected with the buried prefabricated vacuum pump station.

2. The rural outdoor vacuum drainage system according to claim 1, wherein a third inspection well is arranged between the septic collecting tank and the gravity house outlet pipe.

3. The rural outdoor vacuum drainage system according to claim 1 or 2,

the septic collecting box is used for a converter for gravity drainage and vacuum drainage and is also used for a holding container for holding excrement and large sediments with a certain volume; according to whether the cabin where the vacuum valve is located is combined with the excrement storage space or not, the method is divided into two independent schemes:

the first method comprises the following steps: the septic collecting box comprises an upper valve chamber and a lower excrement collecting space, and the upper valve chamber and the lower excrement collecting space adopt an integrated structure; wherein, the excrement interception space at the lower part is divided into three divisions, namely a first division, a second division and a third division, and the volumes of the three divisions are respectively 50%, 25% and 25%; the first two lattices, the first lattice and the second lattice, have the function of intercepting and storing large dirt and excrement; the third grid collects relatively clean sewage as a sewage suction groove for sucking sewage by a vacuum pipeline; a space-independent valve chamber is arranged above the sewage suction tank, and a vacuum valve, a controller, an upper port of an induction pipe, a pressure transmitter and a connecting pipeline including a pneumatic pipeline are arranged in the valve chamber; the vacuum sewage suction pipe and the induction pipe penetrate through the bottom of the valve chamber and extend into the bottom of the sewage suction tank with the third cell distance of 0.05-0.1 m;

the three partitions in the lower space of the septic collecting box are communicated with each other through holes, wherein the distance between the top of the first partition board and the top plate is not less than 0.1m, and the height of the top of the second partition board is not less than 0.05m lower than the height of the bottom of the gravity drainage service pipe; more than 0.5m from the bottom of the box of the first partition board is provided with at least 2 water passing holes; a first inspection well communicated with the ground is arranged at the top of the first grid, and a second inspection well communicated with the ground is arranged at the top between the second grid and the third grid; the valve chamber and the well cover and the well seat of the inspection well adopt heavy protective well covers and well seats; wherein, the well cover of the valve chamber is sealed and is not provided with a vent hole; the thickness of the covering soil of the septic collecting box is not less than 0.3 m; the integral septic collecting box is made of glass fiber reinforced plastic or PE which is corrosion-resistant and convenient to construct;

and the second method comprises the following steps: the septic collecting box comprises a valve box at the upper part and a feces intercepting and storing space at the lower part, the valve box and the feces intercepting and storing space are separately arranged, and the vacuum valve is arranged in an independent valve box;

the vacuum sewage suction pipe and the induction pipe penetrate through the bottom of the valve box and extend into the sewage suction groove from the position, 0.1m away from the bottom, of the side wall of the third grid of the excrement intercepting and storing space; a pressure probe of the pressure transmitter extends into the bottom of the sewage suction tank from a pressure probe interface at the top of the third grid and is fixedly installed; the pressure transmitter is arranged in the valve box; the box cover is sealed and is not provided with a vent hole; when the top cover is arranged on a hardened ground, a heavy protection well cover and a well seat are additionally arranged on the plastic top cover of the valve box;

wherein, the excrement interception space at the lower part is divided into three divisions, namely a first division, a second division and a third division, and the volumes of the three divisions are respectively 50%, 25% and 25%; the first two lattices, the first lattice and the second lattice, have the function of intercepting and storing large dirt and excrement; the third grid collects relatively clean sewage as a sewage suction groove for sucking sewage by a vacuum pipeline;

the three partitions in the lower space of the septic collecting box are communicated with each other through holes, wherein the distance between the top of the first partition board and the top plate is not less than 0.1m, and the height of the top of the second partition board is not less than 0.05m lower than the height of the bottom of the gravity drainage service pipe; more than 0.5m from the bottom of the box of the first partition board is provided with at least 2 water passing holes; a first inspection well communicated with the ground is arranged at the top of the first grid, and a second inspection well communicated with the ground is arranged at the top between the second grid and the third grid; the manhole cover and the manhole seat of the inspection well adopt heavy protective manhole covers and manhole seats; the thickness of the covering soil of the septic collecting box is not less than 0.3 m; the integral septic collecting box is made of glass fiber reinforced plastic or PE which is corrosion-resistant and convenient to construct.

4. The rural outdoor vacuum drainage system according to claim 1 or 2,

the pipeline of the vacuum drainage system comprises a vacuum drainage pipe, a vacuum drainage branch pipe, a vacuum drainage main pipe and a first inspection pipe; the vacuum pipeline adopts a zigzag or bag-shaped laying mode, the minimum gradient of the vacuum pipeline between lifting bends or U-shaped bends is 0.002, and the distance between the lifting bends of the zigzag laying mode is 6-100 m; the drainage does not need gravity gradient, the pipeline is allowed to run along the slope and is conveyed upwards, and a U-shaped bend is arranged in front of a 45-degree ascending section when the pipeline continuously climbs the slope; an inspection pipe leading to the ground is arranged at each lifting bend or U-shaped pipe; the flow speed of the vacuum pipeline is controlled to be 3-7 m/s.

5. The rural outdoor vacuum drainage system of claim 4,

the vacuum pipeline is connected by adopting a high-density polyethylene pipe and a homogeneous pipe fitting through electric melting; or a hard polyvinyl chloride pipe and a homogeneous pipe fitting are adopted for bonding; when the branch pipe of the vacuum pipeline is connected to the main pipe and the length of the straight pipeline is more than 400m, a maintenance valve is arranged.

6. The rural outdoor vacuum drainage system according to claim 1 or 2,

the pressure in the buried vacuum tank is maintained between-0.06 MPa and-0.07 MPa, and the pressure bearing capacity of the tank body is not less than-0.095 MPa; the highest liquid level in the buried vacuum tank should not exceed 1/2 which is the effective height of the tank body.

7. The rural outdoor vacuum drainage system according to claim 1 or 2, wherein the underground prefabricated vacuum pump station is arranged close to the sewage treatment station or at the central position of the vacuum drainage system; adopt and bury formula integral structure, establish vacuum pump, drain pump, stealthily dirty pump, ozone deodorizing device in, distribution cabinet and switch board are established on the outer ground of pump station, the vacuum pump inhales deodorizing device with burying the gas in the formula vacuum tank and handles the back emission, the drain pump is discharged sewage waste water to sewage treatment station or municipal sewage pipeline, accomplishes gas-liquid separation's process in vacuum pump station.

8. The rural outdoor vacuum drainage system according to claim 7, wherein the vacuum pumps are two or more than two rotary vane vacuum pumps with the same operation capability, low noise and high efficiency, and one of the rotary vane vacuum pumps is a standby pump; the vacuum pump air inlet pipe is connected with the top of the buried vacuum tank, and the vacuum pump air outlet pipe is connected with the ozone deodorization device.

9. The rural outdoor vacuum drainage system according to claim 7, wherein the drainage pump is two or more centrifugal drainage pumps of the same type, low-noise dry-type installation and cutting function, and a standby pump is arranged; the drainage pump is connected with the bottom of the buried vacuum tank, and the drainage capacity of the drainage pump meets the drainage requirement of the vacuum tank.

10. The rural outdoor vacuum drainage system according to claim 7, wherein a sump is arranged in the buried prefabricated vacuum pump station and used for collecting a small amount of leakage water from a pipeline, 1 submersible sewage pump is arranged in the sump, and a special check valve and a gate valve for sewage are arranged on a water outlet pipe of the submersible sewage pump; the drain pipe of the submersible sewage pump is merged with the drain pipe of the drain pump and then discharged outdoors.

Images