Liquid level metering device of water quality analyzer

Abstract

The invention relates to a liquid level metering device of a water quality analyzer, belongs to the technical field of water quality analyzers, and aims to solve the problems that working modes cannot be switched quickly, self-cleaning cannot be realized and turbidity detection is deviated when a detected target is a suspended matter, a turbidity matter or a soluble matter, the liquid level metering device of the water quality analyzer comprises a pushing frame and a metering cylinder fixed in the pushing frame, a second sealing plate is fixedly installed at the output end of the motor and makes contact with the first sealing plate, a sealing block is fixedly installed on one side of the second sealing plate and is in sliding connection with the first sealing plate, a reset piece is fixedly installed on one side of the arc-shaped filtering plate, and the output end of the motor is in transmission connection with the reset piece. A cleaning plate is fixedly mounted on one side of the reset part and makes contact with the arc-shaped filter plate, different working modes are rapidly switched according to specific requirements, self-cleaning of the arc-shaped filter plate is achieved, turbidity detection deviation caused by blockage is prevented, and the water pollution detection effect is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of water quality analyzers, and more particularly to a liquid level measuring device for a water quality analyzer. Background Art

[0002] With the continuous increase in the national population, the growth of the number of cities and the expansion of urban scale, the problem of urban domestic water has become increasingly serious, and environmental protection has received more and more attention. Especially for domestic water closely related to people's lives, the water quality is generally monitored to ensure that the use of water quality is not polluted. When monitoring the water quality, a water quality analyzer has the ability to detect key indicators such as COD, ammonia nitrogen, and heavy metals in sewage, and can realize continuous or intermittent transportation of sewage samples through a pipeline pumping system.

[0003] Chinese Patent CN212904843U discloses a liquid level measuring device for a water quality analyzer, including a measuring tube. A support frame is fixedly installed at the top of the measuring tube. A threaded block is fixedly installed inside the support frame. A threaded rod is threadedly connected inside the threaded block. A rotating block is fixedly installed at the bottom of the threaded rod. An adsorption plate is movably installed inside the measuring tube. A fixing block is fixedly installed at the top of the adsorption plate. By rotating the threaded rod, when the threaded rod rotates, it will move upward through the threaded block. Moreover, there is no rotating tooth block on the lower part of the threaded rod. In this way, when the threaded rod rotates, it will drive the fixing block to move upward through the first bearing box and the rotating block. And a fixing block is fixedly installed at the bottom of the fixing block, so that the adsorption plate will move upward, and the air pressure inside the measuring tube will decrease, and thus water will enter the measuring tube through the extraction tube.

[0004] Chinese Patent CN215833395U discloses a precise liquid taking and measuring device for a water quality analyzer, including a measuring cylinder. A piston push rod is slidably connected inside the measuring cylinder. A liquid pipe is connected to the bottom of the measuring cylinder. An auxiliary mechanism is arranged on the measuring cylinder. The auxiliary mechanism includes four fixing plates fixedly connected to the outer wall of the measuring cylinder. A same threaded rod is rotatably connected between the adjacent sides of every two fixing plates. The thread directions of the two threaded rods are opposite to each other. Threaded blocks are threadedly connected to the outer walls of the two threaded rods. Limiting rods are slidably connected inside the two threaded blocks. Both ends of the two limiting rods are fixedly connected to one side of the four fixing plates. This utility model can control the quantitative liquid taking operation of the liquid, and its operation is convenient and the design is reasonable, solving the problem that when taking liquid manually, one has to always concentrate on observing the liquid taking amount.

[0005] The above-mentioned prior art needs to retain the particulate matter in the original water sample when the detection target is suspended matter, turbidity or colloidal substances, and needs to filter out interfering substances when detecting soluble substances. It is impossible to quickly switch the working mode and the filter needs to be manually disassembled and replaced, resulting in low efficiency. The filter is easily clogged by particulate matter after long-term use and cannot achieve self-cleaning, resulting in accumulated measurement errors. The filter blockage may cause deviations in turbidity detection.

[0006] In view of the above problems, a liquid level measuring device for a water quality analyzer is proposed. Summary of the invention

[0007] The object of the present invention is to provide a liquid level metering device for a water quality analyzer. When the device is used for work, different working modes can be quickly switched according to specific needs, and self-cleaning of the arc filter plate can be achieved to prevent blockage from causing deviations in turbidity detection, thereby improving the water pollution detection effect, thereby solving the problem in the above background that when the detection target is suspended matter, turbidity or colloidal substances, the particulate matter in the original water sample needs to be retained, and when soluble substances are detected, interferences need to be filtered, the working mode cannot be quickly switched, self-cleaning cannot be achieved, and turbidity detection deviations occur.

[0008] To achieve the above object, the present invention provides the following technical solutions:

[0009] A liquid level metering device for a water quality analyzer comprises a push frame and a metering cylinder fixed inside the push frame, and the output end of the push frame is connected to one end of the metering cylinder, a piston seat is slidably connected inside the metering cylinder, the output end of the push frame is fixedly connected to the piston seat, one side of the metering cylinder is fixedly connected to an electromagnetic valve, one end of the electromagnetic valve is connected to a water quality analyzer body through a pipeline, a horizontal plate is fixedly installed inside one end of the metering cylinder, an arc-shaped filter plate is fixedly installed inside one end of the metering cylinder, and the arc-shaped filter plate is fixedly connected to the horizontal plate, a motor is fixedly installed on one side of the horizontal plate, and the motor The output end of the machine is connected with one side of the horizontal plate, and a first sealing plate is rotatably connected to one side of the horizontal plate. The first sealing plate is in contact with the arc-shaped filter plate, and the first sealing plate is clamped with the metering cylinder. A second sealing plate is fixedly installed on the output end of the motor, and the second sealing plate is in contact with the first sealing plate. A sealing block is fixedly installed on one side of the second sealing plate, and the sealing block is slidably connected to the first sealing plate. A reset piece is fixedly installed on one side of the arc-shaped filter plate, and the output end of the motor is drivingly connected to the reset piece. A cleaning plate is fixedly installed on one side of the reset piece, and the cleaning plate is in contact with the arc-shaped filter plate.

[0010] Furthermore, the pushing frame includes a support plate and four support columns fixed on one side of the support plate, a frame body is fixedly installed on one end of the support column, a hydraulic cylinder is fixedly installed on one side of the frame body, and an output end of the hydraulic cylinder is connected to one end of the metering cylinder.

[0011] Further, a circular groove is formed on one side inside the measuring cylinder. A spring is fixedly installed inside the circular groove. One end of the spring is fixedly installed with a cambered surface block, and the cambered surface block is slidably connected to the circular groove.

[0012] Further, the piston seat includes a piston plate and a connecting column fixed to one side of the piston plate. There are two sealing rings on the surface of the piston plate, and a rubber ring is arranged on the surface of the piston plate. A limiting column is slidably connected inside the connecting column, and the limiting column is slidably connected to the piston plate. One end of the limiting column is fixedly installed with an arc plate, and the arc plate is slidably connected to the piston plate and is in contact with the rubber ring. L-shaped rods are fixedly installed on both sides of the limiting column, and both L-shaped rods are slidably connected to the connecting column. One end of the L-shaped rod is fixedly installed with a contact block.

[0013] Further, rubber strips are fixedly installed on both sides of the rubber ring, and the rubber strips are slidably connected to the piston plate.

[0014] Further, a flowmeter is fixedly installed inside the solenoid valve, and the flowmeter is electrically connected to the hydraulic cylinder.

[0015] Further, a fixing frame is fixedly installed on the surface of the motor. The fixing frame is fixedly connected to the cross plate. A semi-gear is fixedly installed at the output end of the motor.

[0016] Further, an arc-shaped groove is formed on the surface of the first sealing plate, and the sealing block is slidably connected to the arc-shaped groove.

[0017] Further, the reset member includes a cylinder and a vertical rod fixed to one side of the cylinder. The vertical rod is fixedly connected to the arc-shaped filter plate. A cylinder is rotatably connected to the surface of the vertical rod. A torsion spring is fixedly installed inside the cylinder, and one end of the torsion spring is fixedly connected to the cylinder. A plurality of rollers are arranged inside the cylinder, and the rollers are in contact with the vertical rod. A toothed disc is fixedly installed on the surface of the cylinder, and the semi-gear is meshed with the toothed disc.

[0018] Further, the cleaning plate includes a connecting plate and a plurality of brushes fixed to one side of the connecting plate. The brushes are in contact with the arc-shaped filter plate.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] When it is necessary to retain the particulate matter in the original water sample, the second sealing plate is overlapped with the first sealing plate by the motor to block the arc-shaped filter plate. The piston seat moves upward to extract substances such as suspended matter or colloid. The solenoid valve controls the opening or closing state of the channel between the metering cylinder and the water quality analyzer body. The suspended matter or colloid and other substances can be transported to the water quality analyzer body through a pipeline for detection. The motor drives the first sealing plate to drive the second sealing plate to no longer seal the arc-shaped filter plate. Through the above steps, the dissolved substances can be detected. At the same time, the motor drives the cleaning plate to swing to clean the impurities attached to the surface of the arc-shaped filter plate. The resetting member can make the cleaning plate return to the initial position after rotation, and brush back and forth in this way to improve the cleaning effect and prevent the arc-shaped filter plate from being blocked. Therefore, different working modes can be quickly switched according to specific needs, and the self-cleaning of the arc-shaped filter plate can be realized, preventing blockage from causing deviation in turbidity detection and improving the water pollution detection effect. Brief Description of the Drawings

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 of the present invention Figure 1 Schematic diagram of the structure at A in;

[0023] Figure 3 It is a schematic diagram of the push frame structure of the present invention;

[0024] Figure 4 It is a schematic diagram of the first sealing plate structure of the present invention;

[0025] Figure 5 It is a schematic diagram of the piston seat structure of the present invention;

[0026] Figure 6 of the present invention Figure 5 Schematic diagram of the structure at B in;

[0027] Figure 7 It is a schematic diagram of the state of extracting substances such as suspended matter or colloid of the present invention;

[0028] Figure 8 It is a schematic diagram of extracting dissolved substances of the present invention;

[0029] Figure 9 It is a schematic diagram of the motor structure of the present invention;

[0030] Figure 10 It is a schematic diagram of the resetting member structure of the present invention.

[0031] In the figure: 1. Pushing frame; 11. Support plate; 12. Support column; 13. Frame body; 14. Hydraulic cylinder; 2. Measuring cylinder; 21. Circular groove; 22. Spring; 23. Arc-shaped block; 3. Piston seat; 31. Piston plate; 32. Connecting column; 33. Sealing ring; 34. Rubber ring; 341. Rubber strip; 35. Limit column; 36. Arc-shaped plate; 37. L-shaped rod; 38. Contact block; 4. Solenoid valve; 41. Flowmeter; 5. Water quality analyzer body; 6. Horizontal plate; 7. Arc-shaped filter plate; 8. Motor; 81. Fixed frame; 82. Half gear; 9. First sealing plate; 91. Arc-shaped groove; 10. Second sealing plate; 20. Sealing block; 30. Reset part; 301. Cylinder; 302. Vertical rod; 303. Cylindrical tube; 304. Torsion spring; 305. Roller; 306. Tooth disc; 40. Cleaning plate; 401. Connecting plate; 402. Brush. Detailed implementation manners

[0032] 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, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0033] To solve the technical problem that when the detection target is suspended matter, turbidity or dissolved substances, the working mode cannot be quickly switched, as Figures 1 - 4 , Figure 7 and Figure 8 shown, the following preferred technical solutions are provided:

[0034] A liquid level measuring device for a water quality analyzer, comprising a pushing frame 1 and a measuring cylinder 2 fixed inside the pushing frame 1, and the output end of the pushing frame 1 is connected through the end of the measuring cylinder 2. Through the measuring cylinder 2, the liquid level surface during sewage extraction can be viewed. A piston seat 3 is slidably connected inside the measuring cylinder 2, and the output end of the pushing frame 1 is fixedly connected to the piston seat 3. A solenoid valve 4 is fixedly connected to one side of the measuring cylinder 2, and one end of the solenoid valve 4 is connected to a water quality analyzer body 5 through a pipeline. The working principle of the water quality analyzer body 5 is mainly based on chemical, physical or biological sensing technology, and the water quality is evaluated by detecting specific parameters in the water sample. When sewage needs to be extracted, the channel between the measuring cylinder 2 and the water quality analyzer body 5 is closed through the solenoid valve 4. Subsequently, the piston seat 3 can be driven to move downward through the pushing frame 1, and the piston seat 3 is moved to a suitable position. Then, the pushing frame 1 makes the piston seat 3 move upward to extract sewage. A cross plate 6 is fixedly installed inside one end of the measuring cylinder 2, and an arc-shaped filter plate 7 is fixedly installed inside one end of the measuring cylinder 2. The large particle impurities in the sewage can be filtered through the arc-shaped filter plate 7, and the arc-shaped filter plate 7 is fixedly connected to the cross plate 6. A motor 8 is fixedly installed on one side of the cross plate 6, and the output end of the motor 8 penetrates and is connected to one side of the cross plate 6. A first sealing plate 9 is rotatably connected to one side of the cross plate 6. The first sealing plate 9 is in contact with the arc-shaped filter plate 7 and is clamped with the measuring cylinder 2. The first sealing plate 9 can play a role in sealing the arc-shaped filter plate 7. A second sealing plate 10 is fixedly installed at the output end of the motor 8, and the second sealing plate 10 is in contact with the first sealing plate 9. A sealing block 20 is fixedly installed on one side of the second sealing plate 10, and the sealing block 20 is slidably connected to the first sealing plate 9. When the second sealing plate 10 corresponds to the first sealing plate 9, a sealing effect can be achieved between them.

[0035] When it is necessary to retain the particulate matter in the original water sample, the second sealing plate 10 can be driven to rotate through the motor 8, so that the second sealing plate 10 overlaps with the first sealing plate 9 and seals the arc-shaped filter plate 7. Subsequently, the channel between the measuring cylinder 2 and the water quality analyzer body 5 is closed through the solenoid valve 4. Then, the piston seat 3 can be driven to move downward through the pushing frame 1, and the piston seat 3 is moved to a suitable position. Then, the pushing frame 1 makes the piston seat 3 move upward to extract substances such as suspended solids or colloids. Subsequently, the second sealing plate 10 is reset by reversing the motor 8. The measuring cylinder 2 can be sealed through the first sealing plate 9 and the second sealing plate 10. At this time, the channel between the measuring cylinder 2 and the water quality analyzer body 5 is opened through the solenoid valve 4. The piston seat 3 can be driven to move downward through the pushing frame 1, and substances such as suspended solids or colloids are transported to the water quality analyzer body 5 through the pipeline for detection.

[0036] The pushing frame 1 includes a support plate 11 and four support columns 12 fixed on one side of the support plate 11. A frame body 13 is fixedly installed at one end of the support column 12, and a supporting effect can be achieved through the support plate 11 and the support column 12. A hydraulic cylinder 14 is fixedly installed on one side of the frame body 13, and the hydraulic cylinder 14 can achieve a power driving effect, and the output end of the hydraulic cylinder 14 is connected to one end of the metering cylinder 2. The piston seat 3 can be moved up and down through the hydraulic cylinder 14, which can provide power.

[0037] A circular groove 21 is provided on one side of the metering cylinder 2, and a spring 22 is fixedly installed inside the circular groove 21. A camber block 23 is fixedly installed on one end of the spring 22, and the camber block 23 is slidably connected to the circular groove 21. When the motor 8 drives the second sealing plate 10 to rotate, the first sealing plate 9 is pushed through the sealing block 20, and one side of the first sealing plate 9 applies a pushing force to the camber block 23. Since one end of the camber block 23 is an arc surface, the camber block 23 moves toward the inside of the circular groove 21 and squeezes the spring 22. Then the camber block 23 and the first sealing plate 9 are unfastened, and the first sealing plate 9 is driven to rotate by the sealing block 20. When the first sealing plate 9 is reset, the elastic force of the spring 22 pushes the camber block 23 to engage with the first sealing plate 9, which can play a fixing role in the engagement of the first sealing plate 9.

[0038] An arc groove 91 is provided on the surface of the first sealing plate 9, and the sealing block 20 is slidably connected to the arc groove 91. The arc groove 91 can play a limiting role, and one end of the arc groove 91 can be blocked by the sealing block 20. One end of the arc groove 91 is in a connected state, and the other end does not penetrate the first sealing plate 9. When the sealing block 20 rotates to the end of the arc groove 91, the first sealing plate 9 is pushed to rotate by the sealing block 20.

[0039] In order to solve the technical problem that the arc filter plate 7 cannot achieve self-cleaning, resulting in the accumulation of measurement errors, and the blockage of the arc filter plate 7 may cause the turbidity detection to deviate, such as Figures 9 - 10 As shown, the following preferred technical solutions are provided:

[0040] A reset member 30 is fixedly installed on one side of the arc filter plate 7, and the output end of the motor 8 is transmission connected to the reset member 30. A cleaning plate 40 is fixedly installed on one side of the reset member 30, and the cleaning plate 40 is in contact with the arc filter plate 7. The arc filter plate 7 can be brushed by the cleaning plate 40 to remove debris attached to the surface. A fixing frame 81 is fixedly installed on the surface of the motor 8, and the fixing frame 81 is fixedly connected to the cross plate 6. A half gear 82 is fixedly installed on the output end of the motor 8, and the fixing frame 81 can fix the motor 8, and the half gear 82 can play a connecting role.

[0041] The reset member 30 includes a cylinder 301 and a vertical rod 302 fixed to one side of the cylinder 301. The vertical rod 302 is fixedly connected to the arc-shaped filter plate 7. A cylinder 303 is rotatably connected to the surface of the vertical rod 302. A torsion spring 304 is fixedly installed inside the cylinder 303, and one end of the torsion spring 304 is fixedly connected to the cylinder 301. The torsion spring 304 can provide elastic force and play a role in resetting. A number of rollers 305 are arranged inside the cylinder 303, and the rollers 305 are in contact with the vertical rod 302. A toothed disc 306 is fixedly installed on the surface of the cylinder 303. The half gear 82 is meshed with the toothed disc 306. The output end of the motor 8 drives the half gear 82 to rotate. Since the half gear 82 is meshed with the toothed disc 306, it can then drive the toothed disc 306 to rotate and cause the torsion spring 304 to deform. The rotation of the cylinder 303 can drive the cleaning plate 40 to rotate, and the arc-shaped filter plate 7 can be cleaned. When the half gear 82 is no longer in contact with the toothed disc 306, due to the elastic force of the torsion spring 304, the cylinder 303 drives the cleaning plate 40 back to the initial position. Therefore, reciprocation can improve the cleaning effect and better perform extraction detection.

[0042] The cleaning plate 40 includes a connecting plate 401 and a number of brushes 402 fixed to one side of the connecting plate 401. The brushes 402 are in contact with the arc-shaped filter plate 7. The attachments on the surface of the arc-shaped filter plate 7 can be cleaned by the brushes 402 to prevent the arc-shaped filter plate 7 from being blocked.

[0043] To solve the technical problem that when the sealing ring 33 is damaged, the extraction amount is reduced, affecting the test result, as Figures 5 - 6 shown, the following preferred technical solutions are provided:

[0044] The piston seat 3 includes a piston plate 31 and a connecting column 32 fixed to one side of the piston plate 31. There are two sealing rings 33 on the surface of the piston plate 31. A rubber ring 34 is arranged on the surface of the piston plate 31. The rubber ring 34 can play a compensating role. A limiting column 35 is slidably connected inside the connecting column 32, and the limiting column 35 is slidably connected to the piston plate 31. One end of the limiting column 35 is fixedly installed with an arc plate 36. The arc plate 36 is slidably connected to the piston plate 31 and is in contact with the rubber ring 34. L-shaped rods 37 are fixedly installed on both sides of the limiting column 35. Both L-shaped rods 37 are slidably connected to the connecting column 32. One end of the L-shaped rod 37 is fixedly installed with a contact block 38. Normally, the contact block 38 is not in contact with the measuring cylinder 2. When the two sealing rings 33 are damaged and the sealing effect becomes poor, the connecting column 32 is continuously moved upward through the hydraulic cylinder 14, so that the contact block 38 is in contact with the inside of the measuring cylinder 2. At the same time, the limiting column 35 is driven to move downward. Subsequently, the arc plate 36 presses the inner ring of the rubber ring 34, causing the rubber ring 34 to extend to the periphery and be in contact with the inner wall of the measuring cylinder 2. The rubber ring 34 can play a compensating effect and replace the damaged sealing ring 33.

[0045] Rubber strips 341 are fixedly installed on both sides of the rubber ring 34. The rubber strips 341 are slidably connected to the piston plate 31. Through the rubber strips 341, the rubber ring 34 can be stably positioned inside the piston plate 31. And since the rubber strips 341 are made of rubber, the force exerted by the push of the arc plate 36 can enable the rubber strips 341 to easily disengage from the sliding connection with the piston plate 31.

[0046] A flowmeter 41 is fixedly installed inside the solenoid valve 4, and the flowmeter 41 is electrically connected to the hydraulic cylinder 14. The operator can set in advance the error value between two adjacent detections of the flowmeter 41 through a control module (the control module is a prior art and will not be described in detail here, and is not marked in the figure) (the specific error value can be set according to the sampling amount). When the error value is greater than the preset error value, the hydraulic cylinder 14 is activated through the control module (the control module is a prior art and will not be described in detail here, and is not marked in the figure). The fluid is monitored in real time through the flowmeter 41. When the sealing ring 33 is damaged and the sealing effect deteriorates, the fluid flow rate will continuously be less than the previous flow rate. Through the control module (the control module is a prior art and will not be described in detail here, and is not marked in the figure), the hydraulic cylinder 14 is actuated to continuously move the connecting column 32 upward, so that the contact block 38 comes into contact with the inside of the measuring cylinder 2. The measuring cylinder 2, through the reaction force, causes the contact block 38 and the L-shaped rod 37 to move downward, and at the same time drives the limit post 35 to move downward. Subsequently, the arc plate 36 squeezes the inner ring of the rubber ring 34, causing the rubber ring 34 to extend towards the periphery and come into contact with the inner wall of the measuring cylinder 2. The rubber ring 34 can achieve a compensation effect, replacing the damaged sealing ring 33. Due to the ductility of the rubber ring 34, the rubber ring 34 can improve the sealing effect of the piston plate 31, preventing the sealing performance from decreasing and causing the extraction amount to decrease, which may affect the test results.

[0047] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variation thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0048] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A liquid level measuring device for a water quality analyzer, comprising a pushing frame (1) and a measuring cylinder (2) fixed inside the pushing frame (1), and the output end of the pushing frame (1) is connected through one end of the measuring cylinder (2), characterized in that: The metering cylinder (2) is slidably connected to a piston seat (3), the output end of the push frame (1) is fixedly connected to the piston seat (3), one side of the metering cylinder (2) is fixedly connected to a solenoid valve (4), one end of the solenoid valve (4) is connected to a water quality analyzer body (5) through a pipeline, a transverse plate (6) is fixedly installed inside one end of the metering cylinder (2), an arc-shaped filter plate (7) is fixedly installed inside one end of the metering cylinder (2), and the arc-shaped filter plate (7) is fixedly connected to the transverse plate (6), a motor (8) is fixedly installed on one side of the transverse plate (6), and the output end of the motor (8) is connected to one side of the transverse plate (6), and a first sealing plate (9) is rotatably connected to one side of the transverse plate (6). The sealing plate (9) is in contact with the arc-shaped filter plate (7), and the first sealing plate (9) is clamped with the metering cylinder (2); a second sealing plate (10) is fixedly mounted on the output end of the motor (8), and the second sealing plate (10) is in contact with the first sealing plate (9); a sealing block (20) is fixedly mounted on one side of the second sealing plate (10), and the sealing block (20) is slidably connected to the first sealing plate (9); a reset member (30) is fixedly mounted on one side of the arc-shaped filter plate (7), and the output end of the motor (8) is transmission-connected to the reset member (30); a cleaning plate (40) is fixedly mounted on one side of the reset member (30), and the cleaning plate (40) is in contact with the arc-shaped filter plate (7).

2. The liquid level measuring device of a water quality analyzer according to claim 1, characterized in that: The pushing frame (1) comprises a supporting plate (11) and four supporting columns (12) fixed to one side of the supporting plate (11); a frame body (13) is fixedly mounted on one end of the supporting column (12); a hydraulic cylinder (14) is fixedly mounted on one side of the frame body (13); and an output end of the hydraulic cylinder (14) is connected to one end of the metering cylinder (2).

3. The liquid level measuring device of a water quality analyzer according to claim 1, characterized in that: A circular groove (21) is provided on one side of the metering cylinder (2), a spring (22) is fixedly installed inside the circular groove (21), a curved surface block (23) is fixedly installed at one end of the spring (22), and the curved surface block (23) is slidably connected to the circular groove (21).

4. The liquid level measuring device of a water quality analyzer according to claim 1, characterized in that: The piston seat (3) comprises a piston plate (31) and a connecting column (32) fixed on one side of the piston plate (31); two sealing rings (33) are provided on the surface of the piston plate (31); a rubber ring (34) is provided on the surface of the piston plate (31); a limiting column (35) is slidably connected inside the connecting column (32); the limiting column (35) is slidably connected to the piston plate (31); an arc plate (36) is fixedly installed at one end of the limiting column (35); the arc plate (36) is slidably connected to the piston plate (31); the arc plate (36) is in contact with the rubber ring (34); L-shaped rods (37) are fixedly installed on both sides of the limiting column (35); the two L-shaped rods (37) are both slidably connected to the connecting column (32); a contact block (38) is fixedly installed at one end of the L-shaped rod (37).

5. The liquid level measuring device of a water quality analyzer according to claim 4, characterized in that: Rubber strips (341) are fixedly mounted on both sides of the rubber ring (34), and the rubber strips (341) are slidably connected to the piston plate (31).

6. The liquid level measuring device of a water quality analyzer according to claim 2, characterized in that: A flow meter (41) is fixedly installed inside the solenoid valve (4), and the flow meter (41) is electrically connected to the hydraulic cylinder (14).

7. The liquid level measuring device of a water quality analyzer according to claim 1, characterized in that: A fixing bracket (81) is fixedly installed on the surface of the motor (8), the fixing bracket (81) is fixedly connected to the cross plate (6), and a semi-gear (82) is fixedly installed at the output end of the motor (8).

8. The liquid level measuring device of a water quality analyzer according to claim 1, characterized in that: An arc-shaped groove (91) is formed on the surface of the first sealing plate (9), and the sealing block (20) is slidably connected to the arc-shaped groove (91).

9. The liquid level measuring device of a water quality analyzer according to claim 7, characterized in that: The reset member (30) includes a cylinder (301) and a vertical rod (302) fixed to one side of the cylinder (301). The vertical rod (302) is fixedly connected to the arc-shaped filter plate (7). A cylinder (303) is rotatably connected to the surface of the vertical rod (302). A torsion spring (304) is fixedly installed inside the cylinder (303), and one end of the torsion spring (304) is fixedly connected to the cylinder (301). A number of rollers (305) are arranged inside the cylinder (303), and the rollers (305) are in contact with the vertical rod (302). A toothed disc (306) is fixedly installed on the surface of the cylinder (303), and the semi-gear (82) is meshed with the toothed disc (306).

10. The liquid level measuring device of a water quality analyzer according to claim 1, characterized in that: The cleaning plate (40) includes a connecting plate (401) and a number of brushes (402) fixed to one side of the connecting plate (401), and the brushes (402) are in contact with the arc-shaped filter plate (7).

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