Backwashing device for water quality monitoring equipment

Abstract

The utility model relates to a backwashing device for water quality monitoring equipment, which comprises a PLC (programmable logic controller) control cabinet, a sampling system and a backwashing system, and the PLC control cabinet is connected with the sampling system through the backwashing system; the PLC control cabinet is responsible for controlling the whole system, the sampling system is used for extracting water samples from various water bodies for detection, and the backwashing system is used for cleaning the sampling system. The sampling system is backwashed regularly by utilizing a detection interval, so that the problem that inconsistent water samples are easy to generate due to long-time operation of the existing water quality monitoring equipment is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of water quality monitoring equipment, in particular to a backwashing device for water quality monitoring equipment. Background Art

[0002] The water quality monitoring equipment detects the corresponding indicators of the pool water through probes such as pH, residual chlorine, O3, ORP, etc. and sends the detection values to the water quality monitoring / controller. The water quality monitoring / controller realizes automatic alarm, display, adjustment, and control of related equipment to realize the water quality maintenance function of the system.

[0003] With the full advancement of digital transformation, the need for continuous online water quality monitoring in rivers, lakes, and other water bodies is becoming increasingly urgent. Automated water quality monitoring equipment offers numerous advantages over traditional manual sampling and testing, such as higher testing frequency and 24-hour continuous monitoring. However, numerous challenges remain in practical application, the most prominent of which is the inconsistency between the actual water samples tested and the original water samples from the water body being tested.

[0004] Water quality monitoring equipment typically collects water samples from the water body to be tested via a sampling inlet pipe into a water storage sampling tank within the device. Due to the presence of various impurities and algae in natural water, impurities can accumulate on the inner walls of the pipes and sampling tanks over time, breeding algae and microorganisms. This can lead to inconsistencies between the water sample detected by the water quality sensor and the original water sample. Some devices incorporate a filtration module at the inlet of the sampling inlet pipe. However, to avoid over-filtration of the water sample, they typically only use a large-aperture screen to intercept large impurities such as aquatic plants and wood chips. This only serves to prevent clogging of the device's internal system and cannot resolve the issue of inconsistent water samples. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a backwash device for water quality monitoring equipment, which uses the detection interval to regularly backwash the sampling system, thereby overcoming the problem that the existing water quality monitoring equipment is prone to inconsistent water samples when running for a long time.

[0006] The above-mentioned utility model object of the present invention is achieved through the following technical solutions:

[0007] A backwashing device for water quality monitoring equipment comprises a PLC control cabinet, a sampling system and a backwashing system, wherein the PLC control cabinet is connected to the sampling system via the backwashing system;

[0008] The PLC control cabinet is responsible for controlling the entire system; the sampling system is used to extract water samples from various water bodies for testing; and the backwash system is used to clean the sampling system.

[0009] As a further technical solution of the present invention: the sampling system includes a sampling water pump, a sampling water inlet pipe, a sampling water inlet valve, a sampling water tank and a drain pipe, wherein the sampling water inlet pipe connects the sampling water pump and the sampling water tank;

[0010] The sampling water inlet valve is installed on one end of the sampling water inlet pipe close to the sampling water tank, and is used to control the sampling water inlet;

[0011] One end of the drain pipe is connected to the bottom of the sampling water tank for discharging the water sample back to the water body.

[0012] As a further technical solution of the present invention: the sampling water pump is a variable frequency water pump, which can adjust the pumping flow rate according to usage requirements.

[0013] As a further technical solution of the present invention: the sampling water tank is composed of a transparent acrylic plate, which is convenient for manual observation of the sanitary conditions therein.

[0014] As a further technical solution of the present invention: the sampling system also includes a baffle assembly, which is located in the sampling water tank. The baffle assembly includes multiple upper baffles and multiple lower baffles. The upper baffles and the lower baffles are staggered and fixed up and down. The upper baffles are vertically fixed to the top plate inside the sampling water tank, and the lower baffles are fixed to the bottom plate inside the sampling water tank. The lower baffles and the bottom plate inside the sampling water tank form an angle of 75° to guide the water sample to flow back.

[0015] As a further technical solution of the present invention: the sampling system also includes a water quality sensor, which is fixed to the top plate of the sampling water tank by punching a hole, and the number of the water quality sensors can be flexibly adjusted according to usage requirements.

[0016] As a further technical solution of the present invention: the backwash system includes a backwash water inlet valve, a backwash water inlet pipe, a backwash filter, a backwash drain pipe and a backwash drain valve, the backwash water inlet valve is installed on the sampling water inlet pipe through a three-way joint to control the backwash water inlet;

[0017] The backwash water inlet pipe is connected to the backwash water inlet valve and the sampling water tank, and the backwash filter is connected to the backwash water inlet pipe;

[0018] One end of the backwash drain pipe is connected to the sampling water inlet pipe near the sampling water pump, and the other end is connected to the drain pipe for discharging the backwash water back into the water body;

[0019] The backwash drain valve is connected to the backwash drain pipe and is used to control backwash drainage.

[0020] As a further technical solution of the present invention: the backwash filter contains a composite filter element of PP cotton, activated carbon and ultrafiltration membrane.

[0021] As a further technical solution of the present invention: the sampling water pump, the sampling water inlet valve, the water quality sensor, the backwash water inlet valve, and the backwash drain valve are connected to the PLC control cabinet through wires, and data collection and automatic control are performed according to a set program.

[0022] In summary, the present invention has at least one of the following beneficial technical effects:

[0023] 1. The utility model discloses a backwashing device for water quality monitoring equipment, which uses sampling intervals to regularly backwash the sampling water inlet pipeline and the sampling water tank to ensure that the inner wall is clean, avoid contamination of the sampling water body, and affect the detection results.

[0024] 2. The utility model does not need to introduce additional tap water as backwash water, which reduces the demand for tap water sources nearby in the usage scenario, reduces the cost of laying tap water pipes, and has a good water-saving effect in long-term operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0026] Figure numerals: 1. PLC control cabinet; 2. Sampling water pump; 3. Sampling water inlet pipe; 4. Sampling water inlet valve; 5. Water quality sensor; 6. Sampling water tank; 7. Partition assembly; 71. Upper partition; 72. Lower partition; 8. Backwash drain valve; 9. Backwash water inlet valve; 10. Backwash filter; 11. Backwash water inlet pipe; 12. Backwash drain pipe; 13. Drain pipe. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application; it is obvious that the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0028] In the description of this application, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this application and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "mounted / connected," and "connected" should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances. Example

[0030] Reference Figure 1 The utility model discloses a backwashing device for water quality monitoring equipment, which includes a PLC control cabinet 1, a sampling system and a backwashing system. The PLC control cabinet 1 is connected to the sampling system through the backwashing system; the PLC control cabinet 1 is responsible for controlling the entire system, the sampling system is used to extract water samples from various water bodies for testing, and the backwashing system is used to clean the sampling system.

[0031] The sampling system includes a sampling water pump 2, a sampling water inlet pipe 3, a sampling water inlet valve 4, a sampling water tank 6 and a drain pipe 13. The sampling water inlet pipe 3 is made of PE material and connects the sampling water pump 2 and the sampling water tank 6.

[0032] The sampling water inlet valve 4 is installed on the sampling water inlet pipe 3, near the end of the sampling water tank 6, to control the sampling water intake. A drain pipe 13 made of PE is connected to the bottom of the sampling water tank 6 at one end to discharge the water sample back into the water body. The sampling water pump 2 is a variable frequency pump that can adjust the pumping flow rate according to user needs. The sampling water tank 6 is composed of a transparent acrylic panel, which facilitates manual observation of the sanitary conditions within.

[0033] Reference Figure 1The sampling system also includes a baffle assembly 7, which is located within the sampling water tank 6. The baffle assembly 7 includes multiple upper baffles 71 and multiple lower baffles 72. The upper baffles 71 and lower baffles 72 are staggered and fixed vertically. The upper baffles 71 are vertically fixed to the top plate inside the sampling water tank 6, and the lower baffles 72 are fixed to the bottom plate inside the sampling water tank 6. The lower baffles 72 and the bottom plate inside the sampling water tank 6 form a 75° angle to guide the return flow of the water sample. The sampling system also includes a water quality sensor 5, which is fixed to the top plate of the sampling water tank 6 by punching holes. The number of water quality sensors 5 can be flexibly adjusted according to usage needs.

[0034] The backwash system includes a backwash inlet valve 9, a backwash inlet pipe 11, a backwash filter 10, a backwash drain pipe 12 and a backwash drain valve 8. The backwash inlet valve 9 is installed on the sampling inlet pipe 3 through a three-way joint to control the backwash water inlet;

[0035] The backwash inlet pipe 11 is made of PE and connects the backwash inlet valve 9 and the sampling water tank 6. The backwash filter 10 contains a composite filter element of PP cotton, activated carbon, and ultrafiltration membrane. The backwash filter 10 is connected to the backwash inlet pipe 11. In this embodiment, the PP cotton is mainly used to block large particles such as hair.

[0036] The backwash drain pipe 12 is made of PE material. One end of the backwash drain pipe 12 is connected to the sampling water inlet pipe 3 close to the sampling water pump 2, and the other end is connected to the drain pipe 13, which is used to discharge the water after backwashing back into the water body; the backwash drain valve 8 is connected to the backwash drain pipe 12, which is used to control backwash drainage.

[0037] The sampling water pump 2, the sampling water inlet valve 4, the water quality sensor 5, the backwash water inlet valve 9, and the backwash drain valve 8 are connected to the PLC control cabinet 1 through wires, and data collection and automatic control are performed according to the set program.

[0038] During normal sampling and testing, PLC control cabinet 1 opens sampling inlet valve 4, closes backwash drain valve 8 and backwash inlet valve 9, and starts a low-flow water supply from sampling pump 2. Water samples collected from the water body flow into sampling tank 6. After a set period of time, water quality sensor 5 begins testing the water sample, and the test data is transmitted via wired communication to PLC control cabinet 1. Because water quality sensor 5 and other components in the sampling system do not contaminate the water sample, the tested water sample can flow back into the water body through drain pipe 13.

[0039] After the sampling and testing process has run for a certain period of time, the PLC control cabinet 1 controls the closing of the sampling water inlet valve 4, the opening of the backwash drain valve 8 and the backwash water inlet valve 9, and the start of the high-flow water supply by the sampling water pump 2. The water then flows through the backwash filter 10, undergoing a triple filtration process involving PP cotton, activated carbon, and an ultrafiltration membrane to remove particulate contaminants, algae, and other microorganisms. The clean water then enters the sampling water tank 6 through the backwash inlet pipe 11. Due to the inclined structure of the baffle assembly 7, the water flow continuously accelerates along the trumpet-shaped constriction formed by the baffle assembly 7 and the wall of the sampling water tank 6, ultimately impacting the corner to form intense turbulence.

[0040] This reciprocating turbulence enhances the flushing effect of the water flow on the walls of the sampling water tank 6 and the baffle assembly 7. The angle between the lower baffle 72 and the bottom of the sampling water tank 6 was determined through testing to be between 60-75° for optimal flushing. In practice, a 75° angle was chosen, as a larger angle would affect the insertion and sampling space of the water quality sensor 5. Finally, the backwash water flows into the sampling water inlet pipe 3, flushing its inner walls before flowing back into the water body through the backwash drain pipe 12 and into the drain pipe 13.

[0041] The backwash filter 10 is a crucial component in the backwash system. Ultrafiltration membranes are chosen as the core filter element for two key reasons: First, ultrafiltration membranes can effectively remove algae and large-diameter particulate contaminants. Algae typically measure >1 μm, while the pore size of ultrafiltration membranes is 0.01-0.1 μm. Second, compared to higher-grade nanofiltration or reverse osmosis membranes, ultrafiltration membranes offer a lower pressure drop and lower cost. In actual use, depending on the water quality, the backwash filter 10 should be replaced every one to two years to prevent filter clogging, which could lead to insufficient backwash pressure and affect the overall backwashing effect.

[0042] The implementation principle of the present invention is as follows: the present invention discloses a backwashing device for water quality monitoring equipment, which uses sampling intervals to regularly backwash the sampling water inlet pipe 3 and the sampling water tank 6 to ensure that their inner walls are clean, avoid contaminating the sampling water body and affecting the detection results.

[0043] The embodiments of this specific implementation method are all preferred embodiments of the present utility model, and are not intended to limit the scope of protection of the present utility model. Therefore, any equivalent changes made based on the structure, shape, and principle of the present utility model should be included in the scope of protection of the present utility model.

Claims

1. A backwash device for water quality monitoring equipment, characterized in that: It comprises a PLC control cabinet (1), a sampling system and a backwashing system, wherein the PLC control cabinet (1) is connected to the sampling system via the backwashing system; The PLC control cabinet (1) is responsible for controlling the entire system; the sampling system is used to extract water samples from various water bodies for testing; and the backwash system is used to clean the sampling system; The sampling system comprises a sampling water pump (2), a sampling water inlet pipe (3), a sampling water inlet valve (4), a sampling water tank (6) and a drain pipe (13), wherein the sampling water inlet pipe (3) is connected to the sampling water pump (2) and the sampling water tank (6); The sampling water inlet valve (4) is installed on one end of the sampling water inlet pipe (3) close to the sampling water tank (6) and is used to control the sampling water inlet; One end of the drainage pipe (13) is connected to the bottom of the sampling water tank (6) for discharging the water sample back into the water body; The sampling system further comprises a baffle assembly (7), wherein the baffle assembly (7) is located in the sampling water tank (6), and the baffle assembly (7) comprises a plurality of upper baffles (71) and a plurality of lower baffles (72), wherein the upper baffles (71) and the lower baffles (72) are staggered and fixed up and down, wherein the upper baffles (71) are vertically fixed to the top plate inside the sampling water tank (6), and the lower baffles (72) are fixed to the bottom plate inside the sampling water tank (6), and the lower baffles (72) and the bottom plate inside the sampling water tank (6) form an angle of 75° to guide the return flow of the water sample; The sampling system further comprises a water quality sensor (5), wherein the water quality sensor (5) is fixed to the top plate of the sampling water tank (6) by punching a hole, and the number of the water quality sensors (5) can be flexibly adjusted according to usage requirements; The backwash system comprises a backwash water inlet valve (9), a backwash water inlet pipe (11), a backwash filter (10), a backwash drain pipe (12) and a backwash drain valve (8); the backwash water inlet valve (9) is installed on the sampling water inlet pipe (3) through a three-way joint and is used to control the backwash water inlet; The backwash water inlet pipe (11) is connected to the backwash water inlet valve (9) and the sampling water tank (6), and the backwash filter (10) is connected to the backwash water inlet pipe (11); One end of the backwash drain pipe (12) is connected to the sampling water inlet pipe (3) near the sampling water pump (2), and the other end is connected to the drain pipe (13) for discharging the backwashed water back into the water body; The backwash drain valve (8) is connected to the backwash drain pipe (12) and is used to control backwash drainage; The sampling water pump (2), the sampling water inlet valve (4), the water quality sensor (5), the backwash water inlet valve (9), and the backwash drain valve (8) are connected to the PLC control cabinet (1) via wires, and data acquisition and automatic control are performed according to a set program.

2. A backwashing device for water quality monitoring equipment according to claim 1, characterized in that: The sampling water pump (2) is a variable frequency water pump, which can adjust the pumping flow rate according to usage requirements.

3. A backwashing device for water quality monitoring equipment according to claim 1, characterized in that: The sampling water tank (6) is composed of a transparent acrylic plate, which is convenient for manual observation of the sanitary conditions therein.

4. A backwashing device for water quality monitoring equipment according to claim 1, characterized in that: The backwash filter (10) contains PP cotton, activated carbon, and an ultrafiltration membrane composite filter element.

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