CN112113619A - Experimental device for verifying sewage collecting effect of negative pressure pipeline - Google Patents

Abstract

The invention relates to the technical field of rural domestic sewage collection, in particular to an experimental device for verifying the negative pressure collection effect of domestic sewage. The experimental device in the present invention changes the height of the sewage collection pipeline through the liftable structure in the laboratory according to the actual measured rural topography, simulates the layout of the sewage sewage pipeline in the real rural environment, and uses a vacuum pump to make the vacuum tank and the pipeline generate negative pressure. The negative pressure is used to collect sewage. According to the sewage collection effect of this experimental device, the specific implementation plan of the real rural sewage pipeline is determined.

Description

An experimental device for verifying the effect of negative pressure pipelines for collecting sewage

technical field

The invention relates to the technical field of rural domestic sewage collection, in particular to an experimental device for verifying the effect of negative pressure pipelines for collecting sewage.

Background technique

At present, most of the rural areas in our country have implemented the "toilet revolution" to improve the living environment in rural areas. However, the existing policy is only aimed at converting dry toilets to water toilets, and each household builds three-format septic tanks. There is no further solution for how to deal with sewage when the subsequent septic tanks are full. Referring to international mature cases, there are three solutions depending on the scale of the rural area: the first is to connect the infiltration system around the septic tank to allow the sewage to infiltrate below the surrounding surface. This solution is suitable for single rural households, Switzerland and other countries. This kind of method is adopted in rural areas; the second is to use fecal suction trucks to regularly pump it out, which is suitable for rural areas where people live in a scattered way; Sewage is collected to a sewage treatment plant, which is suitable for rural areas with a certain scale of living. The method of relying on gravity to make the sewage flow to the treatment plant by itself requires deep buried pipelines, a large amount of excavation, and high construction costs. The negative pressure pipe network does not need to be deeply excavated and buried, and the construction amount is small. plan.

Our country has a large population, and the scale of the countryside is much larger than that of countries such as Switzerland. In the long run, building a negative pressure pipe network is an effective solution to rural sewage collection. At present, negative pressure is used to collect sewage, including public toilets in some public places, including the negative pressure toilets used on high-speed railways. The distance between the negative pressure collection device of these toilets and the toilet is very close. When the distance between the pipes is very long , such as 2 kilometers, the negative pressure collection effect is closely related to the specific implementation. The theoretical analysis of the negative pressure sewage pipe network has a lot of literature. Generally, the coverage of the negative pressure pipe network in rural areas should reach a radius of one kilometer to have practical application value. The negative pressure collection system that has been built in this range is still Not seen in reports. In particular, the terrain in different parts of the countryside is different, the terrain is uneven, and the landforms are different. Therefore, how to arrange the collection pipe network in reality to ensure the effect of sewage collection needs to be verified by experiments before construction.

Application Publication No. CN 109455894 A discloses a negative pressure collection system for rural toilet septic tank manure and farmer sewage, and Application Publication No. CN 110158742 A discloses a negative pressure sewage collection process, which does not involve long-distance negative pressure pipeline collection How does the effect verify this core question.

The invention can adjust the different height differences of each pipeline in the laboratory according to the real rural terrain measured, simulate the actual pipeline laying state in the countryside, and monitor the parameter values of the pipelines at any time at any time, so as to verify the effect of negative pressure collecting sewage.

SUMMARY OF THE INVENTION

(1) Technical problems solved

In order to verify the effect of collecting sewage by the negative pressure pipeline, the present invention proposes an experimental device for verifying the effect of collecting sewage by the negative pressure pipeline.

(2) Technical solutions

An experimental device for verifying the effect of collecting sewage by a negative pressure pipeline, including a water outlet valve, a hard pipe, a hose, a septic tank, a liftable structure, a vacuum pump, and a vacuum tank, characterized in that the hard pipe and the hose constitute a sewage pipeline , the septic tank is connected to a sewage pipeline composed of a hard pipe and a hose, the elevating structure supports a sewage pipeline composed of a hard pipe and a flexible hose, and the vacuum tank is connected to a sewage pipeline composed of a hard pipe and a hose, so The vacuum pump is connected to the vacuum tank.

Preferably, the length of the sewage pipeline composed of hard pipes and flexible tubes is consistent with the length of the pipeline actually to be constructed in rural areas.

Preferably, the septic tank adopts a three-grid septic tank.

Preferably, hoses are used to connect hard pipes at different heights.

Preferably, the water outlet valve is an electronically controlled valve.

Preferably, the liftable structure is realized by using an air cylinder.

Preferably, a pressure sensor is installed on the hard pipe to monitor the pressure change in the pipe.

Preferably, the rigid tube and the flexible tube are transparent tubes, and a camera is installed on the outside of the tube, which can photograph and record the flow characteristics of the liquid in the tube.

Preferably, the negative pressure in the sewage pipeline is 0.3 - 0.7 bar.

(3) Beneficial effects

The invention proposes an experimental device for verifying the effect of collecting sewage by a negative pressure pipeline, which has the following advantages:

According to the actual situation of the rural terrain, the height of the pipeline at different positions of the entire pipeline is adjusted through the elevating structure to simulate the rural sewage pipeline and verify the sewage effect. If the sewage discharge effect is good, the construction of sewage pipelines can be implemented in rural areas according to the layout of laboratory sewage pipelines. If the sewage discharge effect is not good, the pressure sensor and camera can be used to detect the pressure and observe the liquid flow state in the pipeline, adjust the height of the pipeline at different positions, and find a combination method that can meet the sewage discharge, so as to provide a basis for the construction of sewage pipeline network in rural areas.

Description of drawings

The advantages of the present invention will become more apparent with reference to the embodiments shown in the following drawings, in which:

1 is a schematic diagram of an experimental device for verifying the effect of collecting sewage in a negative pressure pipeline according to the present invention;

Fig. 2 is the partial schematic diagram of the experimental device in the present invention;

Figure 3 is a schematic diagram of a lifting device;

In the accompanying drawings, the list of components represented by each number is as follows:

1- Inlet valve, 2- Primary filter, 3- Secondary filter, 4- Tertiary filter, 5- Outlet valve, 6- Pressure sensor, 7- Vision camera, 8- Hard pipe, 9- Hose , 10-liftable structure, 11-vacuum tank, 12-vacuum pump, 13-sewage outlet, 101-base, 102-stroke block, 103-cylinder, 104-semi-ring bracket.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

FIG. 1 is a schematic diagram of an embodiment of the present invention. Including water inlet valve 1, primary filter pool 2, secondary filter pool 3, tertiary filter pool 4, outlet valve 5, pressure sensor 6, visual camera 7, hard pipe 8, hose 9, liftable structure 10, vacuum tank 11, vacuum pump 12, sewage outlet 13.

Referring to Fig. 1, an experimental device for verifying the effect of collecting sewage by a negative pressure pipeline. First, the outlet valve 5 is in a closed state. The vacuum pump 12 generates a negative pressure of 0.3 bar in the sewage pipe composed of the vacuum tank 11 , the hard pipe 8 and the hose 9 . The sewage flows into the first-level filter tank 2, the second-level filter tank 3 and the third-level filter tank 4 of the three-grid septic tank through the inlet valve 1 in turn, and when the third-level filter tank 4 is full and needs to be drained, the outlet valve 5 Open, under the action of the pressure difference, the sewage flows to the vacuum tank 11 through each section of the hard pipe 8 and the hose 9, and then flows to the subsequent sewage treatment plant through the sewage outlet 13. The rigid pipe 8 is erected by the liftable structure 10 so that each section of the rigid pipe 8 has different heights, so as to simulate the real terrain in the countryside. The terrain with the same buried pipe height can be simulated by the hard pipe 8 , and the terrain with the height difference can be connected with the flexible flexible hose 9 . A pressure sensor 6 is installed on the hard pipe 8 or the hose 9 to monitor the pressure change in the pipe in real time. The rigid tube 8 or the flexible tube 9 used in the experimental device is a transparent tube, and a visual camera 7 is installed on the outside of the pipeline, which can photograph and record the fluid state in the pipeline.

FIG. 2 is a partial schematic diagram of the experimental device, mainly expressing that the hose 9 is connected to the rigid pipe 8 of different heights.

Figure 3 is a schematic diagram of a liftable device. It includes a base 101 , a stroke block 102 , a cylinder 103 , and a semi-annular bracket 104 . The hard pipe 8 is mounted on the semi-annular bracket 104, and the cylinder 103 realizes the lifting and lowering of the hard pipe 8. The height of the stroke block 102 determines the stroke of the cylinder 103. According to different stroke requirements, the stroke block 102 of different heights can be replaced.

The height of the rigid pipe 8 is adjusted by the lifting structure 10 , that is, the rigid pipe 8 is mounted on the liftable device 10 , and the height of the rigid pipe 8 depends on the lifting height of the liftable device 10 . For example, the first section of hard pipe is raised to 3 meters with the first liftable device, and the second section of hard pipe is raised to 8 meters with the second liftable device, and the two kinds of hard pipes with different heights have a height of 5 meters The difference is then connected through the hose 9, and the multi-section rigid pipe 8, the hose 9 and the liftable device 10 constitute an integral sewage pipeline. The ultimate purpose of the invention is to simulate whether the pipelines with height differences that will be built in actual rural areas can discharge sewage normally.

For example, during an actual experiment:

Experiment 1: The overall height difference of the pipeline is 5 meters;

Experiment 2: The overall height difference of the pipeline is 0 meters, and there are 3 pipes in the middle that are raised by 2 meters respectively;

Finally, the data is obtained through the experiment, which provides the basis for the layout of the rural negative pressure sewage pipeline.

In the description of this specification, description with reference to the terms "one embodiment," "example," "specific example," etc. means that specific features, structures, materials, and features described in connection with the embodiment or example are included in the present invention. in at least one embodiment or example. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above-disclosed preferred embodiments of the present invention are provided only to help illustrate the present invention. The preferred embodiments do not exhaust all the details and do not limit the invention to specific embodiments only. Obviously, many modifications and variations are possible in light of the content of this specification. The present specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can well understand and utilize the present invention.

Claims (9)

1. The utility model provides a verify experimental apparatus that negative pressure pipeline collected sewage effect, includes outlet valve, hard tube, hose, septic tank, elevating gear, vacuum pump, vacuum tank, its characterized in that, hard tube, hose constitute sewage pipes, the sewage pipes that hard tube, hose constitute is connected to the septic tank, the sewage pipes that hard tube, hose constitute is connected to the vacuum tank, elevating gear supports the sewage pipes that hard tube, hose constitute, vacuum pump connection vacuum tank.

2. The experimental device for verifying the sewage collecting effect of the negative pressure pipeline according to claim 1, wherein: the length of the sewage discharge pipeline formed by the hard pipe and the hose is consistent with the length of the pipeline to be actually constructed in rural areas.

3. The experimental device for verifying the sewage collecting effect of the negative pressure pipeline according to claim 1, wherein: the septic tank adopts a three-grid septic tank.

4. The experimental device for verifying the sewage collecting effect of the negative pressure pipeline according to claim 1, wherein: the hose is used for connecting hard pipes at different heights.

5. The experimental device for verifying the sewage collecting effect of the negative pressure pipeline according to claim 1, wherein: the water outlet valve is an electric control valve.

6. The experimental device for verifying the sewage collecting effect of the negative pressure pipeline according to claim 1, wherein: the lifting structure can be realized by adopting an air cylinder.

7. The experimental device for verifying the sewage collecting effect of the negative pressure pipeline according to claim 1, wherein: a pressure sensor is arranged on the hard pipe to monitor the pressure change in the pipeline at any time.

8. The experimental device for verifying the sewage collecting effect of the negative pressure pipeline according to claim 1, wherein: the hard pipe and the soft pipe are transparent pipes, and the camera is arranged on the outer side of the pipeline and can shoot and record the flowing characteristic of liquid in the pipeline.

9. The experimental device for verifying the sewage collecting effect of the negative pressure pipeline according to claim 1, wherein: the negative pressure in the sewage discharge pipeline is 0.3-0.7 bar.

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