Intermittent negative pressure sewage collection system

Abstract

The utility model discloses an intermittent negative pressure sewage collecting system which comprises collecting wells, a sewage conveying pipeline, a negative pressure tank, a sewage adjusting pool and a control assembly, the collecting wells collect sewage discharged by residents, and the sewage conveying pipeline is communicated with a sewage outlet of each collecting well on a laying path of the sewage conveying pipeline. The inlet end of the negative pressure tank is communicated with the tail end of the sewage conveying pipeline, and the inlet end of the sewage adjusting pool is communicated with the sewage outlet of the negative pressure tank through a pipeline. In the conveying process, the negative pressure collecting wells along the sewage conveying pipeline sequentially start to work, water is continuously conveyed to the sewage conveying pipeline, the flow speed is high, the impact force is strong, particles and sticky and turbid substances are difficult to deposit, the liquidity of the sewage discharging pipeline is improved, blockage is avoided, and therefore cleaning work in the negative pressure collecting wells and the negative pressure pipeline is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to an intermittent negative pressure sewage collection system. Background Art

[0002] Compared with the gravity drainage system, the vacuum drainage system has the advantages of small pipe diameter, shallow burial depth, and flexible laying. The cost of pipeline construction is much lower than that of gravity pipes. However, it is different from rural sewage and municipal vacuum drainage. A vacuum well at the front end of municipal vacuum drainage often serves dozens of households, with a large amount of water. The amount of water absorbed each time is relatively large, so it is easy to form water blockage on the vacuum sewage pipeline, that is, the vacuum pipeline is full of water, but there is relatively little gas, resulting in low vacuum at the end of the pipeline and unable to absorb water. At the same time, large particles in the sewage in the vacuum well will also cause the vacuum sewage pipeline to be blocked and unable to operate. Utility Model Content

[0003] The purpose of this section is to summarize some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract of the specification and the name of the utility model of this application to avoid blurring the purpose of this section, the abstract of the specification and the name of the utility model, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0004] Therefore, the purpose of the utility model is to provide an intermittent negative pressure sewage collection system to improve the fluidity of the sewage pipeline and avoid blockage.

[0005] In order to solve the above technical problems, according to one aspect of the present invention, the present invention provides the following technical solutions:

[0006] An intermittent negative pressure sewage collection system, comprising:

[0007] Collection wells to collect sewage discharged by residents;

[0008] A sewage conveying pipeline, which is connected to the sewage outlet of each collection well along its laid path;

[0009] A negative pressure tank, the inlet end of which is in communication with the tail end of the sewage conveying pipeline, and the negative pressure tank is connected to a pressure relief valve via a pipeline;

[0010] A sewage regulating tank, the inlet end of which is connected to the sewage outlet of the negative pressure tank through a pipeline;

[0011] The control component is configured as follows: during collection, the control component closes the pressure relief valve and generates negative pressure in the negative pressure tank. When the negative pressure value in the negative pressure tank reaches the set pressure, the negative pressure in the negative pressure tank stops being generated, and the control component controls the pressure relief valve to automatically open and release the pressure.

[0012] As a preferred solution of the intermittent negative pressure sewage collection system described in the utility model, the collection well includes a well body and a liquid level float valve group arranged on the well body, and the well body has a sewage inlet pipe connected to the sewage pipe of the resident.

[0013] As a preferred solution of an intermittent negative pressure sewage collection system described in the utility model, the control component includes a negative pressure pump for generating negative pressure in the negative pressure tank, a sewage pump arranged on the pipeline, and an electrical control box for controlling the negative pressure pump, the sewage pump and the pressure relief valve switch.

[0014] As a preferred solution of the intermittent negative pressure sewage collection system described in the utility model, the liquid level float valve group includes a sewage pipe located in the well body and one end of which extends to the outside of the well body and is connected to the sewage conveying pipeline, a filter cartridge connected to the other end of the sewage pipe, and a float arranged in the filter cartridge.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] 1) Under the suction effect of negative pressure, the sewage in the collection well of the utility model flows along the sewage conveying pipeline toward the negative pressure station. During the conveying process, the negative pressure collection wells along the sewage conveying pipeline start to work one by one, continuously conveying water to the sewage conveying pipeline with fast flow rate and strong impact force. Particles and sticky substances are difficult to deposit, thus improving the fluidity of the sewage pipeline and avoiding blockage, thereby avoiding the cleaning work in the negative pressure collection well and the negative pressure pipeline.

[0017] 2) The intermittent working mode of the utility model is more energy-efficient than the mode of long-term negative pressure state.

[0018] 3) Compared with the traditional liquid level float valve group, the utility model adopts a liquid level float valve group composed of a sewage pipe, a filter cartridge and a float. The complex pressure relief valve that relies on pressure difference to provide power is transformed into a high-level water float switch that relies on the buoyancy of water to control the switch, which reduces the cost and improves reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solution of the implementation of the utility model, the utility model will be described in detail below in combination with the drawings and detailed implementation. Obviously, the drawings described below are only some implementations of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0020] Figure 1 This is a schematic diagram of the overall structure of an intermittent negative pressure sewage collection system of the utility model;

[0021] Figure 2 The utility model is a cross-sectional view of a collection well of an intermittent negative pressure sewage collection system. DETAILED DESCRIPTION

[0022] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0023] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the implementation of the present invention, for the sake of convenience, the cross-sectional diagram showing the device structure will not be partially enlarged according to the general proportion, and the schematic diagram is only an example, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0024] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0025] The utility model provides an intermittent negative pressure sewage collection system, which improves the fluidity of the sewage discharge pipeline and avoids blockage.

[0026] Figure 1-Figure 2 The structure diagram of an intermittent negative pressure sewage collection system of the utility model is shown. Figure 1-Figure 2 In this embodiment, an intermittent negative pressure sewage collection system is provided, and its main parts include a collection well 100, a sewage conveying pipeline 200, a negative pressure tank 300, a sewage regulating tank 400 and a control component 500.

[0027] The collection well 100 is used to collect sewage discharged by the residents. In this embodiment, the collection well 100 includes a well body 110 and a liquid level float valve group 120 arranged in the well body 110. The well body 110 has a sewage inlet pipe 110a connected to the sewage pipe of the resident, wherein the liquid level float valve group 120 includes a sewage pipe 120a located in the well body 110 and one end of which extends to the outside of the well body 110 and is connected to the sewage conveying pipeline 200, a filter cartridge 120b connected to the other end of the sewage pipe 120a, and a filter cartridge 120b arranged in the filter cartridge 120b and connected to the liquid The float 120c electrically connected to the level controller 130 rises in the filter cartridge 120b when the liquid level in the collection well 100 rises, and drops in the filter cartridge 120b when the liquid level in the collection well 100 drops to the bottom, and contacts the end of the sewage pipe 120a, thereby sealing and closing the sewage pipe 120a. Compared with the traditional liquid level float valve group, the complex pressure relief valve that relies on pressure difference for power is changed to a high-level water float switch that relies on the buoyancy of water to control the switch, which reduces the manufacturing cost and improves reliability.

[0028] The sewage conveying pipeline 200 is laid along a route that is connected to the sewage outlet of each collection well 100 .

[0029] The inlet end of the negative pressure tank 300 is communicated with the tail end of the sewage conveying pipeline 200 , and a pressure relief valve 310 is connected to the negative pressure tank 300 through a pipeline to relieve the pressure in the negative pressure tank 300 .

[0030] The inlet end of the sewage regulating tank 400 is connected to the sewage outlet of the negative pressure tank 300 through a pipe H;

[0031] The control component 500 is configured as follows: during collection, the control component 500 closes the pressure relief valve 310 and generates negative pressure in the negative pressure tank 300; when the negative pressure value in the negative pressure tank 300 reaches the set pressure, the negative pressure in the negative pressure tank 300 stops being generated, and the control component 500 controls the pressure relief valve to automatically open and release the pressure. In this embodiment, a negative pressure pump 510 that generates negative pressure in the negative pressure tank 300, a sewage pump 520 arranged on the pipeline H, and an electrical control box 530 that controls the negative pressure pump 510, the sewage pump 520, and the switch of the pressure relief valve 310 are included.

[0032] Combination Figure 1-Figure 2 , an intermittent negative pressure sewage collection system in this embodiment, the specific use process is as follows: the approximate water consumption of each household is obtained through preliminary market survey to control the collection interval time. When collecting, first close the pressure relief valve 310, and the electric control box 530 in the negative pressure station starts the negative pressure pump 510 and the sewage pump 520 to extract the air in the negative pressure tank 300, so that the negative pressure tank 300 and the sewage conveying pipeline 200 are in a negative pressure state, and negative pressure is formed in the sewage conveying pipeline 200, and the sewage is collected gradually from near to far. When the low liquid level is reached in the negative pressure collection well 100 of a household, the high-level water float 120c in the well will be adsorbed on the pipe mouth of the sewage pipe 120a to form a closure, and then start to pump the collection well 100 of another household (or several households) until all are pumped out. When the negative pressure value of the negative pressure station reaches the set pressure, the negative pressure pump 510 and the sewage pump 520 in the negative pressure station stop working, and the pressure relief valve 310 automatically opens to release pressure, so that the negative pressure tank 300 and the sewage conveying pipeline 200 return to normal pressure, and the float floats up. The pressure of the sewage conveying pipeline 200 is stable when working, and the sewage flows toward the negative pressure tank 300 under the suction effect of negative pressure. During the conveying process, the collection wells 100 along the line start to work in turn, and continuously convey water to the sewage conveying pipeline 200, with fast flow rate and strong impact force, and particles and viscous substances are difficult to deposit, thereby avoiding the cleaning work in the collection well 100 and the sewage conveying pipeline 200. After a short stay in the negative pressure station, the sewage is discharged to the municipal sewage pipe network or the integrated sewage treatment equipment. The specially designed negative pressure collection system does not need to maintain a normal negative pressure state in the sewage conveying pipeline 200, which increases the service life of the equipment and saves energy consumption. The stable inlet water quality promotes the stable and reliable effluent water quality of the sewage treatment equipment.

[0033] When the negative pressure system starts to work, two negative pressure pumps 510 are turned on at the same time to extract the air in the negative pressure tank 300, so that the negative pressure tank 300 and the sewage conveying pipeline 200 are in a negative pressure state. When the reading of the negative pressure gauge reaches the set value (0.03-0.04Mpa range), one negative pressure pump 510 is turned off and the other negative pressure pump 510 continues to work. When the reading of the negative pressure gauge reaches the set value (0.08-0.1Mpa range), the other negative pressure pump 510 is turned off.

[0034] When the liquid level in the negative pressure tank 300 reaches 60% of the tank body, the first sewage pump 520 starts working. In order to prevent the failure of the first sewage pump 520 and the untimely drainage, the standby sewage pump 520 is turned on when the liquid level in the negative pressure tank 300 reaches 80% of the tank body. When the water in the tank is drained to 20%, the sewage pump 520 is turned off.

[0035] Although the present invention has been described above with reference to the embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed in the present invention may be used in combination with each other in any manner, and the fact that these combinations are not exhaustively described in this specification is only for the sake of omitting space and saving resources. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An intermittent negative pressure sewage collection system, characterized in that: include: A collection well (100) for collecting sewage discharged by residents; A sewage conveying pipeline (200) is connected to the sewage outlet of each collection well (100) along its laying path; A negative pressure tank (300), the inlet end of which is in communication with the tail end of the sewage conveying pipeline (200), and a pressure relief valve (310) is connected to the negative pressure tank (300) via a pipeline; A sewage regulating tank (400), the inlet end of which is connected to the sewage outlet of the negative pressure tank (300) through a pipe (H); The control component (500) is configured as follows: during collection, the control component (500) closes the pressure relief valve (310) and generates negative pressure in the negative pressure tank (300); when the negative pressure value in the negative pressure tank (300) reaches a set pressure, the negative pressure in the negative pressure tank (300) stops being generated, and the control component (500) controls the pressure relief valve (310) to automatically open and release pressure.

2. An intermittent negative pressure sewage collection system according to claim 1, characterized in that: The collection well (100) comprises a well body (110) and a liquid level float valve group (120) arranged in the well body (110); the well body (110) has a sewage inlet pipe (110a) connected to a sewage pipe of a household.

3. An intermittent negative pressure sewage collection system according to claim 2, characterized in that: The control component (500) comprises a negative pressure pump (510) for generating negative pressure in the negative pressure tank (300), a sewage pump (520) arranged on the pipeline (H), and an electric control box (530) for controlling the switching of the negative pressure pump (510), the sewage pump (520) and the pressure relief valve (310).

4. The intermittent negative pressure sewage collection system according to claim 2, characterized in that: The liquid level float valve assembly (120) comprises a sewage pipe (120a) located in the well body (110) and having one end extending to the outside of the well body (110) and connected to a sewage conveying pipeline (200), a filter cartridge (120b) connected to the other end of the sewage pipe (120a), and a float (120c) arranged in the filter cartridge (120b).

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