Dosing system for sewage treatment

Abstract

The utility model discloses a sewage treatment dosing system which comprises at least one sodium hypochlorite adding line, the sodium hypochlorite adding line comprises a sodium hypochlorite storage tank, a pumping device, a valve, a low-pressure pipe and a check valve which are sequentially connected through a pipeline, the outlet end of the check valve is connected with a dosing pipe, and the dosing pipe extends to a dosing point for dosing. The pipeline comprises a main pipeline connected with the sodium hypochlorite storage tank and a plurality of branch pipelines, the pumping device, the valve, the low-pressure pipe and the check valve are all located on the branch pipelines, and a back pressure valve is arranged on the pipeline between the valve and the low-pressure pipe. The back pressure valves are arranged at the pipeline positions of the branch pipes, and the problem that the pesticide amount of the branch pipes is unbalanced is greatly solved through adjustment of the back pressure valves; in addition, the pressure of the valve element of the back pressure valve is set to be of an automatic adjusting structure, adjustment can be conducted according to needs in the using process so that different opening degrees can be provided, in addition, the back pressure valve can also be used as a control valve, and forward and reverse flushing can be provided when cleaning is needed.

Description

TECHNICAL FIELD

[0001] The utility model relates to a medicine adding system, especially sewage treatment dosing system. BACKGROUND

[0002] With the acceleration of industrialization process and the continuous growth of urban population, water pollution problem is increasingly serious, various complex pollutants contained in sewage pose a serious threat to ecological environment and human health. Sewage treatment plant as the key facility to control water pollution, in the treatment process, one of the key steps is to add sodium hypochlorite to disinfect water.

[0003] The application number CN201711434638.6 discloses a kind of sewage treatment precise dosing system and dosing method, by its Figure 3 As shown in the figure, it adds the medicine in storage tank to water treatment tank by pump and pipeline cooperation to disinfect;As described in the attached Figure 3 In the process of dosing disinfection, single pipe multi-point adding mode is often used, and this structure has the advantages of simple structure and multi-point adding.

[0004] But there is pressure difference in the pipeline of this structure, which will cause uneven distribution of drug amount. UTILITY MODEL CONTENT

[0005] Based on the deficiencies of the sampler in the prior art that is easy to be blocked when taking water, affecting the collection of water sample and ultimately affecting the detection of water quality, the utility model provides a sewage treatment dosing system.

[0006] The utility model solves the above technical problems by adopting the technical scheme of:

[0007] Sewage treatment dosing system, including at least one sodium hypochlorite adding line, sodium hypochlorite adding line includes sodium hypochlorite storage tank, pumping device, valve, low pressure pipe and check valve connected by pipeline in turn, the outlet end of check valve is connected with dosing pipe, dosing pipe extends to dosing point and carries out dosing, pipeline includes main pipeline and how many branch pipe pipeline connected with sodium hypochlorite storage tank, pumping device, valve, low pressure pipe and check valve are located on branch pipe pipeline, back pressure valve is arranged at the pipeline between valve and low pressure pipe, back pressure valve includes valve body and valve core slidingly arranged in valve body, the inside of valve body is equipped with passageway and is equipped with the obturator for being obturated by valve core between both ends of passageway, adjustable pressure gas spring type pressure exerting device is arranged in valve body when valve core abuts obturator.

[0008] As preferred, the gas spring type pressure exerting device includes a cylinder and a first piston slidingly arranged in the cylinder, a connecting rod is hinged between the rod body of the first piston and the valve core, and an adjusting structure is arranged at the cylinder.

[0009] Preferably, the pressure regulating structure includes a second piston disposed in the cylinder body, and the rod of the second piston is connected to the output end of a push rod motor or a telescopic cylinder.

[0010] Preferably, the connecting rod, cylinder, and first piston are arranged symmetrically in two sets, with the second piston located in the cylinder on the left and the cylinder on the right having an open structure.

[0011] Preferably, the cylinder is horizontally mounted on the valve body, and the valve core is vertically slidably mounted inside the valve body. The channel includes three sections, namely a first horizontal section on the left, a vertical section in the middle, and a second horizontal section on the right. The first horizontal section is lower than the second horizontal section, and both the vertical section and the second horizontal section are connected to the cavity inside the valve body.

[0012] Preferably, the sealing port is located in the vertical section, and the sealing port is conical with a sealing plug on the valve core that matches the shape of the conical port.

[0013] Preferably, a baffle is provided in the cavity inside the valve body, the valve core passes through the baffle and slides and seals with the baffle, and the connecting rod is located in the cavity above the baffle.

[0014] Compared with the prior art, the advantages of this utility model are as follows: By setting back pressure valves at each branch pipeline, the problem of unbalanced drug dosage in the branch pipelines can be greatly improved by adjusting the back pressure valves; in addition, the pressure of the back pressure valve core is set to an automatic adjustment structure, which can be adjusted as needed during use to provide different opening and closing degrees. Furthermore, it can also be used as a control valve to provide forward and reverse flushing when cleaning is required. Attached Figure Description

[0015] The present invention will be further described in detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be construed as limiting the scope of the present invention. Furthermore, unless specifically indicated, the drawings are only schematic representations of the composition or structure of the described objects and may contain exaggerated depictions, and the drawings are not necessarily drawn to scale.

[0016] Figure 1 This is the piping diagram in this application;

[0017] Figure 2 This is a perspective view of the back pressure valve in this application;

[0018] Figure 3 This is a cross-sectional view of the back pressure valve in this application;

[0019] In the diagram: 1. Valve; 2. Back pressure valve; 20. Valve core; 21. Valve body; 211. Channel; 212. Sealing port; 213. Baffle; 22. Cylinder body; 23. Telescopic cylinder; 24. Second piston; 25. First piston; 26. Connecting rod; 3. Low-pressure pipe; 4. Pumping device; 5. Check valve; 6. Dosing pipe. Detailed Implementation

[0020] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are merely descriptive and exemplary and should not be construed as limiting the scope of protection of the present invention.

[0021] It should be noted that similar labels in the following figures indicate similar items; therefore, once an item is defined in one figure, it may not be further defined and explained in subsequent figures.

[0022] This embodiment mainly describes the title of the wastewater treatment chemical dosing system, as follows:

[0023] Wastewater treatment dosing systems, such as Figures 1-3 As shown, it includes at least one sodium hypochlorite addition line. The sodium hypochlorite addition line includes a sodium hypochlorite storage tank, a pumping device 4, a valve 1, a low-pressure pipe 3, and a check valve 5 connected in sequence through pipelines. The outlet end of the check valve 5 is connected to a dosing pipe 6, which extends to the dosing point for dosing. The pipeline includes a main pipeline connected to the sodium hypochlorite storage tank and several branch pipelines. The pumping device 4, valve 1, low-pressure pipe 3, and check valve 5 are all located on the branch pipelines. A back pressure valve 2 is provided in the pipeline between valve 1 and low-pressure pipe 3. The back pressure valve 2 includes a valve body 21 and a valve core 20 slidably disposed in the valve body 21. The valve body 21 has a channel 211 inside, and a sealing port 212 for being blocked by the valve core 20 is provided between the two ends of the channel 211. The valve body 21 has an adjustable pressure spring-type pressure application device that allows the valve core 20 to press against the sealing port 212 when pressure is applied to the valve core 20. In this scheme, the pressure in the pipeline can be kept stable by setting back pressure valve 2, thereby avoiding the imbalance of drug dosage caused by pressure difference. In addition, back pressure valve 2 applies pressure through a gas spring type pressure application device, which uses gas as the compression medium, providing convenience for adjustment.

[0024] Preferably, the gas spring type pressure application device includes a cylinder body 22 and a first piston 25 slidably disposed within the cylinder body 22. A connecting rod 26 is hinged between the rod of the first piston 25 and the valve core 20. A pressure regulating structure is provided at the cylinder body 22. This design forms the basic structure of the gas spring type pressure application device. When the pressure inside the pipe increases, the valve core 20 is pushed open, pushing the connecting rod 26, thereby pushing the piston to slide inward. The gas inside the cylinder is pressurized and provides elastic force.

[0025] Preferably, the pressure regulating structure includes a second piston 24 disposed within the cylinder 22, the rod of which is connected to the output end of a push rod motor or a telescopic cylinder 23. This design further includes a second piston 24, which is normally stationary. When the pressure of the valve core 20 needs to be adjusted, the second piston 24 moves towards the first piston 25 to compress the internal gas, thereby increasing the resistance to opening the valve core 20. Additionally, when the second piston 24 slides in the reverse direction, it can fully open the valve core 20 to provide conditions for forward and reverse flushing.

[0026] Preferably, two sets of connecting rods 26, cylinders 22, and first pistons 25 are arranged symmetrically on the left and right sides. The second piston 24 is located at the cylinder 22 on the left side, while the cylinder 22 on the right side has an open structure. This design uses two sets of connecting rods 26 and cylinders 22 to limit the valve core 20, ensuring its stability and preventing circumferential wobbling.

[0027] Preferably, the cylinder 22 is horizontally mounted on the valve body 21, and the valve core 20 is vertically slidably mounted inside the valve body 21. The channel 211 includes three sections: a first horizontal section on the left, a vertical section in the middle, and a second horizontal section on the right. The first horizontal section is lower than the second horizontal section, and both the vertical section and the second horizontal section communicate with the internal cavity of the valve body 21. The liquid drug enters from the first horizontal section into the vertical section, then into the internal cavity of the valve body 21, and finally flows into the pipeline through the second horizontal section.

[0028] Preferably, the sealing port 212 is located in the vertical section, and the sealing port 212 is a conical opening with a sealing plug on the valve core 20 that matches the shape of the conical opening.

[0029] Preferably, a baffle 213 is provided in the cavity inside the valve body 21, the valve core 20 passes through the baffle 213 and slides and seals with the baffle 213, and the connecting rod 26 is located in the cavity above the baffle 213. A sealing structure is provided at the baffle 213 to prevent liquid drugs from leaking from there.

[0030] Additionally, it should be noted that a control valve is installed at the dosing pipe 6, and a limiting step is provided on the side wall of the valve core 20. The limiting step abuts against the partition to limit and prevent the valve core 20 from sliding up excessively.

[0031] The title provided above provides a detailed description of the present utility model. Specific examples have been used to illustrate the principles and implementation methods of the present utility model. The description of the above embodiments is only for the purpose of helping to understand the present utility model and its core ideas. It should be noted that for those skilled in the art, several improvements and modifications can be made to the present utility model without departing from the principles of the present utility model, and these improvements and modifications also fall within the protection scope of the claims of the present utility model.

Claims

1. A wastewater treatment chemical dosing system, comprising at least one sodium hypochlorite dosing line, the sodium hypochlorite dosing line comprising, in sequence, a sodium hypochlorite storage tank, a pumping device, a valve, a low-pressure pipe, and a check valve connected by a pipeline, wherein the outlet end of the check valve is connected to a dosing pipe, and the dosing pipe extends to a dosing point for dosing, characterized in that, The pipeline includes a main pipeline connected to the sodium hypochlorite storage tank and several branch pipelines. The pumping device, valves, low-pressure pipes and check valves are all located on the branch pipelines. A back pressure valve is installed in the pipeline between the valves and the low-pressure pipe. The back pressure valve includes a valve body and a valve core that is slidably installed in the valve body. The valve body has a channel inside and a sealing port between the two ends of the channel for being blocked by the valve core. The valve body has an adjustable pressure spring-type pressure application device in which the valve core abuts against the sealing port when pressure is applied to the valve core.

2. The wastewater treatment dosing system according to claim 1, characterized in that, The gas spring type pressure application device includes a cylinder and a first piston that is slidably disposed in the cylinder. A connecting rod is hinged between the rod of the first piston and the valve core. A pressure regulating structure is provided at the cylinder.

3. The wastewater treatment dosing system according to claim 2, characterized in that, The pressure regulating structure includes a second piston disposed in the cylinder body, and the rod of the second piston is connected to the output end of the push rod motor or the telescopic cylinder.

4. The wastewater treatment dosing system according to claim 3, characterized in that, The connecting rod, cylinder, and first piston are arranged symmetrically in two sets, with the second piston located in the cylinder on the left and the cylinder on the right having an open structure.

5. The wastewater treatment dosing system according to claim 4, characterized in that, The cylinder is horizontally mounted on the valve body, and the valve core is vertically slidably mounted inside the valve body. The channel includes three sections: a first horizontal section on the left, a vertical section in the middle, and a second horizontal section on the right. The first horizontal section is lower than the second horizontal section, and both the vertical section and the second horizontal section are connected to the cavity inside the valve body.

6. The wastewater treatment dosing system according to claim 5, characterized in that, The sealing port is located in the vertical section. The sealing port is conical and the valve core is equipped with a sealing plug that matches the shape of the conical port.

7. The wastewater treatment dosing system according to claim 5, characterized in that, The valve body has a partition inside, the valve core passes through the partition and slides and seals with the partition, and the connecting rod is located in the cavity above the partition.

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