Sewage sampling anti-blocking structure and usage method

Abstract

The present invention provides a sewage sampling anti-blocking structure and a use method, comprising a main line, a branch waterway A and a branch waterway B, wherein both ends of the branch waterway A are installed on the main line to form a closed loop, one end of the branch waterway B is installed between a filter A and a solenoid valve B on the main line, and the other end of the branch waterway B is installed between a booster pump and a solenoid valve C on the branch waterway A, the main line is sequentially installed with a filter A, a solenoid valve B, a water pump and a solenoid valve D; the branch waterway A is sequentially installed with a filter B, a booster pump and a solenoid valve C, a one-way valve is installed on a bypass at the booster pump of the branch waterway B, and the branch waterway B is installed with a solenoid valve A; in the present invention, the main line, the branch waterway A and the branch waterway B cooperate with each other and use the booster pump and the water pump to drive the water flow to flow in reverse, so as to achieve a cleaning effect on the filter A and the filter B, thereby preventing the filter A and the filter B from being blocked.

Description

Technical Field

[0001] The present invention belongs to the technical field of sewage detection, and in particular relates to a sewage sampling anti-blocking structure and a use method thereof. Background Art

[0002] Sewage sampling is widely used in the fields of water quality testing and toxicology monitoring, but there are usually a lot of impurities in the sewage environment, which can easily cause the sampling water inlet to be blocked. At the same time, sewage collection equipment often needs to run continuously for a long time. Once a problem occurs, it is difficult to maintain it in time, which will cause sampling failure. The existing technology mainly processes sewage by sedimentation and grinding sewage impurities, but sedimentation cannot meet the real-time nature of sewage sampling. In addition, during the sedimentation waiting time, it is very likely that the sewage itself will change, causing errors in the test results; grinding impurities in sewage is an effective solution, but the crushed impurities are naturally mixed into the sewage, which may cause a large error between the proportion of the substance content in the sewage and the actual content, and is not suitable for sampling needs.

[0003] The existing patent CN205307909U provides a sampling anti-blocking control system, which includes a sampling subsystem and a controller. The sampling subsystem includes a sampling device and a cleaning device. The sampling device includes a sampling device and a sampling pump connected through a main measuring pipeline. A filter is provided at one end of the sampling tube, and the other end of the sampling tube is connected to the water inlet of the sampling pump; the cleaning device includes a cleaning structure and a filter cleaning structure; the filter cleaning is mainly performed by cleaning the surface of the filter by a cleaning brush. In the process of cleaning the suspended matter attached to the filter by the cleaning brush, some suspended matter will be attached to the water, causing incorrect sampling.

[0004] In summary, the problems existing in the prior art are:

[0005] 1. The sedimentation method cannot meet the real-time requirements of sewage sampling, and the waiting time is long, and the sewage itself will change.

[0006] 2. The method of grinding impurities in sewage will cause a large error between the proportion of material content in sewage and the actual content. In addition, in the prior art, the suspended matter on the filter screen is processed by cleaning the brush, which will cause some suspended matter to adhere to the water, resulting in sampling errors. Summary of the invention

[0007] The purpose of the present invention is to solve the interference problem caused by the precipitation method and the impurity grinding method, and to solve the problem of how to clear the pipeline after it is blocked by sewage residue.

[0008] To achieve the above-mentioned objectives, the present invention provides a sewage sampling anti-blocking structure, comprising a main line, a branch waterway A and a branch waterway B, wherein one end of the branch waterway A is connected to the water inlet of the main line, and the other end of the branch waterway A is connected to the main line between a water pump and an electromagnetic valve D, one end of the branch waterway B is installed between a filter A and an electromagnetic valve B on the main line, and the other end of the branch waterway B is installed between a booster pump and an electromagnetic valve C on the branch waterway A, and a filter A, an electromagnetic valve B, a water pump and an electromagnetic valve D are installed on the main line in sequence; a filter B, a booster pump and an electromagnetic valve C are installed on the branch waterway A in sequence, a one-way valve is installed on the bypass at the booster pump of the branch waterway B, and an electromagnetic valve A is installed on the branch waterway B.

[0009] Under normal circumstances, solenoid valves B and D are open, and sewage is sampled through the main pipeline. Filter A is the main blockage point. When filter A is blocked, the valves of solenoid valves B and C are closed and the booster pump is started to drive the water flow in the opposite direction. The water flows through branch waterway A and branch waterway B in turn, so that the water flow acts on filter A, thereby achieving self-cleaning of filter A.

[0010] When the filter B on the branch water channel A is clogged, the valves of solenoid valve B and solenoid valve C are opened, and the valves of solenoid valve D and solenoid valve A are closed. Under the action of the pump, the water flows through the main channel, branch water flow A and the one-way valve in sequence, thereby achieving self-cleaning of the filter B.

[0011] When either filter A or filter B fails to work properly, filter A fails to work, solenoid valve C is closed, and solenoid valves B, D and A are opened at the same time, and sewage passes through branch water channel A, branch water channel B and the main water channel to achieve sampling; filter B fails to work, the main water channel operates normally, solenoid valves B and D are opened, solenoid valves A and C are closed, and sewage is sampled through the main water channel.

[0012] Beneficial effects:

[0013] The sewage collection structure of the present invention has a self-clearing function, which can keep the sewage sampling pipeline unobstructed without human intervention. If the blockage and cleaning fail, the redundant channel can be used to ensure that the collection will not be interrupted. This design provides sufficient guarantee for continuous and uninterrupted sewage sampling. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is the use state I of the sewage collection and anti-blocking structure provided by the embodiment of the present invention;

[0015] Figure 2 This is the use state II of the sewage collection and anti-blocking structure provided in the embodiment of the present invention;

[0016] Figure 3This is the use state III of the sewage collection and anti-blocking structure provided by the embodiment of the present invention;

[0017] Figure 4 This is the usage state IV of the sewage collection and anti-blocking structure provided in the embodiment of the present invention.

[0018] Figure numerals: 1-main line, 2-branch water channel A, 3-branch water channel B, 4-filter A, 5-filter B, 6-solenoid valve A, 7-solenoid valve B, 8-solenoid valve C, 9-solenoid valve D, 10-check valve, 11-water pump, 12-boosting pump. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0020] The application principle of the present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0021] Please refer to Figures 1 to 4 The sewage sampling anti-blocking structure includes a main line 1, a branch waterway A2 and a branch waterway B3, wherein one end of the branch waterway A2 is connected to the water inlet of the main line 1, and the other end of the branch waterway B2 is connected to the main line 1 between the pump 11 and the solenoid valve D9, and the branch waterway A2 is connected to the main line 1 to form a closed loop; one end of the branch waterway B3 is installed between the filter A4 and the solenoid valve B7 of the main line 1, and the other end of the branch waterway B3 is installed between the booster pump 12 and the solenoid valve C8 on the branch waterway A2, and the main line 1 is sequentially installed with a filter A4, a solenoid valve B7, a pump 11 and a solenoid valve D9; the branch waterway A2 is sequentially installed with a filter B5, a booster pump 12 and a solenoid valve C8, wherein the booster pump 12 on the branch waterway A2 has a bypass, a one-way valve 10 is installed on the bypass, and a solenoid valve A6 is installed on the branch waterway B3.

[0022] The method of using the sewage sampling anti-blocking structure, in which the method of reverse water flow to clear the blocked pipeline is:

[0023] Please refer to Figure 2Under normal circumstances, the valves of solenoid valve B7 and solenoid valve D9 are open, and sewage is sampled through the main line 1. Filter A4 is the main blockage point. When filter A4 is blocked, the valves of solenoid valve B7 and solenoid valve C8 are switched to closed. At this time, the booster pump 12 is started to drive the water flow to flow in the opposite direction. Since the valves of solenoid valve B7 and solenoid valve C8 are closed, and the valve of solenoid valve A6 is open, the reverse water flow enters from the water inlet and flows to the branch waterway A2, and then flows from the branch waterway A2 into the branch waterway B3, so that the reverse water flow acts on the filter A4, and then the blockage on the filter A4 is flushed away by the power of the booster pump 12, thereby realizing the self-cleaning of the filter A4.

[0024] The method of using the sewage sampling anti-blocking structure, including the method of clearing the blockage of the branch waterway is:

[0025] Please refer to Figure 3 , the filter B5 on the branch waterway A2 is clogged. Using the same principle, the valves of the solenoid valve B7 and the solenoid valve C8 are opened, while the valves of the solenoid valve D9 and the solenoid valve A6 are closed. Under the action of the water pump 11, the water flows from the water inlet into the main waterway 1 and passes through the water pump 11, and then enters the branch waterway A2 from the main waterway 1. Since the valve of the solenoid valve A6 is closed, the water can only pass through the solenoid valve C8 and the one-way valve 10, thereby providing a flushing force for the filter B5 to flush away the obstruction on the filter B5 and realize self-cleaning of the filter B5; because it is usually difficult for the booster pump 12 to achieve reverse water flow, it needs to be short-circuited through the one-way valve 10.

[0026] The method of using the sewage sampling anti-blocking structure, including the redundant sampling method is:

[0027] Please refer to Figure 4 , when one of the filters A4 or B5 is blocked and cannot be cleaned by the above methods; when filter A4 is blocked, close the solenoid valve B5, and open the solenoid valve B7, solenoid valve D9 and solenoid valve C8 at the same time, the sewage enters the branch waterway A2 through the water inlet and passes through the filter B5 and the booster pump 12 in turn, and then enters the branch waterway B3 from the branch waterway A2, enters the main line 1 from the branch waterway B3 and passes through the solenoid valve B7, the pump 11 and the solenoid valve D9 in turn, so as to carry out sewage sampling; when filter B5 is blocked, the main line 1 operates normally, the solenoid valve B7 and the solenoid valve D9 are opened, the solenoid valve A6 and the solenoid valve C8 are closed, and the sewage enters the main line 1 from the water inlet and passes through the filter A4, the solenoid valve B7, the pump 11 and the solenoid valve D9 in turn for sampling.

[0028] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for using a sewage sampling anti-blocking structure, characterized in that: The sewage sampling anti-blocking structure comprises: a main line, a branch waterway A and a branch waterway B, wherein one end of the branch waterway A is connected to the water inlet of the main line, and the other end of the branch waterway A is connected to the main line between the water pump and the electromagnetic valve D, one end of the branch waterway B is installed between the filter A and the electromagnetic valve B on the main line, and the other end of the branch waterway B is installed between the booster pump and the electromagnetic valve C on the branch waterway A, and the filter A, the electromagnetic valve B, the water pump and the electromagnetic valve D are installed in sequence on the main line; the filter B, the booster pump and the electromagnetic valve C are installed in sequence on the branch waterway A, a one-way valve is installed on the bypass at the booster pump of the branch waterway B, and the electromagnetic valve A is installed on the branch waterway B; The use method includes: the use method of the sewage sampling anti-blocking structure, when the filter A fails to work, the solenoid valve C is closed, and the solenoid valve B, the solenoid valve D and the solenoid valve A are opened at the same time, and the sewage passes through the branch waterway A, the branch waterway B and the main waterway, thereby realizing sampling; When the filter B on the branch water channel A is clogged, the valves of solenoid valve B and solenoid valve C are opened, and the valves of solenoid valve D and solenoid valve A are closed. Under the action of the pump, the water flows through the main channel, branch water flow A and the one-way valve in sequence, thereby achieving self-cleaning of the filter B.

2. The method for using the sewage sampling anti-blocking structure according to claim 1, characterized in that: Also includes: Under normal circumstances, solenoid valves B and D are open, and sewage is sampled through the main pipeline. Filter A is the main blockage point. When filter A is blocked, the valves of solenoid valves B and C are closed and the booster pump is started to drive the water flow in the opposite direction. The water flows through branch waterway A and branch waterway B in turn, so that the water flow acts on filter A, thereby achieving self-cleaning of filter A.

3. The method for using the sewage sampling anti-blocking structure according to claim 1, characterized in that: Also includes: When filter B fails to work and the main pipeline operates normally, solenoid valve B and solenoid valve D are opened, solenoid valve A and solenoid valve C are closed, and sewage is sampled through the main pipeline.

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