A water quality automatic detection device and detection system

Abstract

The present invention discloses an automatic water quality detection device, which relates to the field of water quality detection. The automatic water quality detection device includes a base, a sampling and injection mechanism, a water sample extraction power mechanism, a test bag and a driving mechanism. The sampling and injection mechanism is provided with a water inlet, which is used to obtain water samples; the water sample extraction power mechanism is connected to the water inlet, and the water sample extraction power mechanism provides power for the sampling and injection mechanism to obtain water samples; the test bag is arranged on the base, and the sampling and injection mechanism can inject the water sample therein into the test bag; the driving mechanism can drive the sampling and injection mechanism to inject the water sample into the test bag. In the automatic water quality detection device provided by the present invention, the sampling and injection mechanism can automatically obtain water samples through the water sample extraction power mechanism, and the sampling and injection mechanism can inject the obtained water samples into the test bag under the drive of the driving mechanism, thereby achieving the purpose of automatic sampling and automatic detection. This detection device is simple and convenient to operate, reduces labor costs, and improves work efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of water quality detection, and in particular to an automatic water quality detection device and a detection system. Background Art

[0002] At present, the more mature and reliable water quality testing methods at home and abroad are all through manual sampling, preservation, on-site or transfer to the laboratory for qualitative and quantitative analysis. This testing method has high data accuracy, but it takes a lot of time and manpower costs, and the measurement takes a certain amount of time, and the data has a lag. For the detection of sewage treatment operation process with a high sampling frequency, this method is neither economical nor timely.

[0003] The alternative detection method usually adopted by sewage treatment plants is to take samples manually and then use test kits for testing. This detection method is easy to operate, the test results are immediately available, and the test data allows staff to understand the operation status of the sewage treatment system and adjust the operating parameters in time. It is a very important link in the operation of the sewage treatment system.

[0004] However, the current method of testing using test kits basically relies on manual sampling and testing on-site or in a laboratory, which is labor-intensive. Summary of the invention

[0005] The object of the present invention is to provide an automatic water quality detection device to realize automatic sampling and automatic detection of test packages.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] A water quality automatic detection device, comprising:

[0008] Pedestal;

[0009] A sampling injection mechanism, which is arranged on the base, and the sampling injection mechanism is provided with a water inlet, and the water inlet is used to obtain water samples;

[0010] A water sample extraction power mechanism, which is connected to the water inlet, and provides power for the sampling and injection mechanism to obtain the water sample;

[0011] A test pack, the test pack is arranged on the base, and the sampling injection mechanism can inject the water sample therein into the test pack;

[0012] A driving mechanism is provided, wherein the driving mechanism can drive the sampling and injection mechanism to inject the water sample into the test package.

[0013] Optionally, a medicine wheel is further included, wherein the medicine wheel can be rotatably disposed on the base, and the test packages are evenly disposed on the medicine wheel.

[0014] Optionally, a transmission mechanism is further included, and the transmission mechanism can drive the medicine wheel to rotate, and the driving mechanism can drive the transmission mechanism to move.

[0015] Optionally, the transmission mechanism comprises:

[0016] A transmission rod connected to the driving mechanism;

[0017] A ratchet assembly, wherein the ratchet assembly comprises a ratchet and an active pawl, wherein the ratchet is connected to the medicine wheel disc, the active pawl is arranged on one side of the ratchet, and the active pawl is connected to the transmission rod, and the ratchet assembly is used to drive the medicine wheel disc to rotate in one direction.

[0018] Optionally, a first connecting plate is further included, and the sampling and injection mechanism, the transmission mechanism and the driving mechanism are respectively connected to the first connecting plate, so that the driving mechanism can simultaneously drive the sampling and injection mechanism and the transmission mechanism to operate.

[0019] Optionally, the sampling injection mechanism comprises:

[0020] A syringe, the syringe comprising a core rod, a core sleeve, a gasket and a needle, one end of the core sleeve is provided with the needle connected to the core sleeve, and the other end is fixedly connected to the gasket, the core rod passes through the gasket and extends into the core sleeve, and the core rod can reciprocate in the core sleeve;

[0021] A spring, wherein the spring is sleeved on the core rod and located between the first connecting plate and the gasket, and is used to restore the syringe to its original position;

[0022] A first limiting unit is provided on the core sleeve, wherein the first limiting unit is fixedly connected to the base and is used to limit the movement of the core sleeve;

[0023] A second limiting unit is fixedly connected to the base and is disposed between the gasket and the first connecting plate, so as to limit the movement of the first connecting plate and the core sleeve.

[0024] Optionally, a sealing block is further included, wherein the sealing block is disposed between the needle and the test pack, and the needle can pass through the sealing block to inject the water sample into the test pack.

[0025] Optionally, it further includes a second connecting plate fixed on the base, the second connecting plate is arranged between the medicine wheel and the sampling injection mechanism, and the sealing block is arranged on the second connecting plate.

[0026] Optionally, a camera is further included, which is fixed on the base and is used to obtain a picture of the test package after color development.

[0027] Another object of the present invention is to provide an automatic water quality detection system to achieve automatic detection and automatic alarm of water quality.

[0028] To achieve this object, the present invention adopts the following technical solutions:

[0029] A water quality automatic detection system comprises the water quality automatic detection device.

[0030] Beneficial effects of the present invention:

[0031] The automatic water quality detection device provided by the present invention has a sampling and injection mechanism that can automatically obtain water samples through a water sample extraction power mechanism, and the sampling and injection mechanism can inject the obtained water samples into a test package under the drive of a driving mechanism, thereby achieving the purpose of automatic sampling and automatic detection. The detection device is simple and convenient to operate, reduces labor costs, and improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the initial state structure of the automatic water quality detection device provided by an embodiment of the present invention;

[0033] Figure 2 It is a schematic diagram of the working state structure of the automatic water quality detection device provided by an embodiment of the present invention;

[0034] Figure 3 is a schematic structural diagram of the transmission mechanism provided by an embodiment of the present invention in the initial state of the automatic water quality detection device;

[0035] Figure 4 It is a structural schematic diagram of the transmission mechanism provided by an embodiment of the present invention when the automatic water quality detection device is in a working state;

[0036] Figure 5 It is a schematic diagram of the structure of the automatic water quality detection system provided by an embodiment of the present invention.

[0037] In the figure:

[0038] 100. Data processing device; 200. Control device;

[0039] 1. Base; 2. Sampling and injection mechanism; 3. Medicine wheel; 4. Driving mechanism; 5. Transmission mechanism; 6. Test package; 7. First connecting plate; 8. Second connecting plate; 9. Sealing block; 10. Camera; 11. Water sample extraction power mechanism;

[0040] 21. water inlet; 22. water outlet; 23. syringe; 24. spring; 25. first limiting unit; 26. second limiting unit; 31. rotating shaft; 32. one-way bearing; 51. transmission rod; 52. ratchet assembly;

[0041] 231, core rod; 232, core sleeve; 233, gasket; 234, needle; 521, ratchet; 522, active pawl; 523, limit pawl. DETAILED DESCRIPTION

[0042] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0043] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.

[0044] Unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection or a detachable 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, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] Unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include the first feature being in direct contact with the second feature, or may include the first feature being in contact with the second feature through another feature between them instead of being in direct contact. Moreover, a first feature being "above", "above" and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0046] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0047] like Figure 1 and Figure 2 As shown, this embodiment provides an automatic water quality detection device, which includes a base 1, a sampling and injection mechanism 2, a water sample extraction power mechanism 11, a test package 6 and a driving mechanism 4. The sampling and injection mechanism 2 is provided with a water inlet 21, and the water inlet 21 is used to obtain water samples; the water sample extraction power mechanism 11 is connected to the water inlet 21, and the water sample extraction power mechanism 11 provides power for the sampling and injection mechanism 2 to obtain water samples; the test package 6 is arranged on the base 1, and the sampling and injection mechanism 2 can inject the water sample therein into the test package 6; the driving mechanism 4 can drive the sampling and injection mechanism 2 to inject the water sample into the test package 6. In this embodiment, the water sample extraction power mechanism 11 is a water pump, and the water pump includes a pneumatic diaphragm valve for controlling the start and stop of the pump. The water inlet 21 of the sampling and injection mechanism 2 is connected to the water pump through a water pipe to obtain water samples.

[0048] In the automatic water quality detection device provided in this embodiment, the sampling and injection mechanism 2 can automatically obtain water samples through the water sample extraction power mechanism 11, and the sampling and injection mechanism 2 injects the obtained water samples into the test package 6 under the drive of the driving mechanism 4, thereby achieving the purpose of automatic sampling and automatic detection. This detection device is simple to operate, reduces labor costs, and improves work efficiency.

[0049] Preferably, a water outlet 22 is also provided on the sampling injection mechanism 2 to relieve the pressure of the water on the sampling injection mechanism 2. The driving mechanism 4 is a cylinder, and the cylinder body is fixed on the base 1. Of course, in other embodiments, the driving mechanism 4 can also be other driving mechanisms 4 such as oil cylinders and linear motors.

[0050] Optionally, the automatic water quality detection device provided in this embodiment also includes a medicine wheel 3, which can be rotatably arranged on the base 1, and the test package 6 is evenly arranged on the medicine wheel 3 to achieve the purpose of multiple detection. In this embodiment, the medicine wheel 3 is set to two, and the two medicine wheels 3 are connected by a rotating shaft 31, and the two ends of the rotating shaft 31 are connected to the base 1 through a one-way bearing 32. A preset number of test packages 6 are provided on each medicine wheel 3. This setting can realize the simultaneous detection of the content of two different substances in water quality. The two medicine wheels 3 are respectively provided with test packages 6 with different medicines, and the medicines in the test packages 6 on each medicine wheel 3 are the same, so each medicine wheel 3 is used to test the content of different substances in water quality. Of course, in other embodiments, test packages with the same medicine can also be placed on the two medicine wheels 3, and the measurement result takes the average value of the two test packages. Correspondingly, the sampling injection mechanism 2 is also set to two.

[0051] In the present embodiment, COD test pack 6 and ammonia nitrogen test pack 6 are placed on two reagent wheels 3 respectively, and COD and ammonia nitrogen content in water quality are tested respectively. Each reagent wheel 3 is provided with 20 test packs 6, and 20 tests can be performed. Wherein the COD test pack 6 has a determination range of 0-250mg / L, and the ammonia nitrogen test pack 6 has a determination range of 0-20mg / L. The specification of the test pack 6 is ф10*71mm, and the liquid height in the test pack 6 is 30mm. In other embodiments, the types of test packs 6 on the reagent wheel 3 can be set according to the substances to be detected, for example: to detect COD content and ammonia nitrogen content, COD test pack 6 and ammonia nitrogen test pack 6 are respectively set on the two reagent wheels 3, and to detect total phosphorus content and total nitrogen content, total phosphorus test pack 6 and total nitrogen test pack 6 are respectively set on the two reagent wheels 3. The measurement range and specifications of the test package 6 are selected according to the needs; the number of test packages 6 on each medicine wheel 3, the number of medicine wheels 3 and sampling injection mechanisms 2 are not limited and are also set according to the needs.

[0052] Optionally, the automatic water quality detection device provided in this embodiment further includes a transmission mechanism 5, which can drive the medicine wheel 3 to rotate, and the driving mechanism 4 can drive the transmission mechanism 5 to move. The transmission mechanism 5 is used to drive the medicine wheel 3 to rotate, so that the sampling injection mechanism 2 injects a water sample into a new test package 6 on the medicine wheel 3 during the next detection.

[0053] Specifically, Figure 3 and Figure 4 As shown, the transmission mechanism 5 includes a transmission rod 51 and a ratchet assembly 52. ​​The transmission rod 51 is connected to the driving mechanism 4; the ratchet assembly 52 includes a ratchet 521, an active pawl 522 and a limit pawl 523. The ratchet 521 is coaxially connected to the medicine wheel 3 and the ratchet 521 can drive the medicine wheel 3 to rotate. The active pawl 522 and the limit pawl 523 are respectively located on both sides of the ratchet 521 and are respectively connected to the transmission rod 51. The ratchet assembly 52 is used to drive the medicine wheel 3 to rotate in one direction. The active pawl 522 cooperates with the ratchet 521 to drive the medicine wheel 3 to rotate, and the limit pawl 523 can limit the ratchet 521 from continuing to move under the action of inertia. In this embodiment, the ratchet assembly 52 is used to enable the driving mechanism 4 to drive the sampling injection mechanism 2 and the transmission mechanism 5 to move to the left, and the sampling injection mechanism 2 injects the water sample into the test package 6 on the medicine wheel 3 while ensuring that the medicine wheel 3 does not rotate; when the driving mechanism 4 drives the sampling injection mechanism 2 and the transmission mechanism 5 to move to the right, the sampling injection mechanism 2 returns to its initial state, and at the same time, the medicine wheel 3 rotates one grid under the action of the ratchet assembly 52, and the test package 6 corresponding to the sampling injection mechanism 2 is replaced, so that during the next detection, the sampling injection mechanism 2 injects the water sample into the new test package 6.

[0054] Optionally, the automatic water quality detection device provided in this embodiment further includes a first connecting plate 7, and the sampling injection mechanism 2, the transmission mechanism 5 and the driving mechanism 4 are respectively connected to the first connecting plate 7, so that the driving mechanism 4 can simultaneously drive the sampling injection mechanism 2 and the transmission mechanism 5 to operate. In this embodiment, one end of the cylinder rod of the cylinder is fixedly connected to the first connecting plate 7, one end of the transmission rod 51 of the transmission mechanism 5 is fixedly connected to the first connecting plate 7, and one end of the sampling injection mechanism 2 is clamped with the first connecting plate 7, so that the driving mechanism 4 can simultaneously drive the sampling injection mechanism 2 and the transmission mechanism 5 to operate. In other embodiments, the sampling injection mechanism 2 can also be fixedly connected or abutted to the first connecting plate 7.

[0055] Optionally, the sampling and injection mechanism 2 includes a syringe 23, a spring 24, a first limiting unit 25 and a second limiting unit 26. The syringe 23 includes a core rod 231, a core sleeve 232, a gasket 233 and a needle 234. One end of the core sleeve 232 is provided with a needle 234 connected to the core sleeve 232, and the other end is fixedly connected to the gasket 233. The core rod 231 passes through the gasket 233 and extends into the core sleeve 232. The core rod 231 can reciprocate in the core sleeve 232, so that the core sleeve 232 contains a water sample or injects the water sample in the core sleeve 232 into the test pack 6 through the needle 234; the spring 24 is sleeved on the core sleeve 231. The first limiting unit 25 is arranged on the core sleeve 232, and the first limiting unit 25 is fixedly connected to the base 1 to limit the movement of the core sleeve 232, so that the syringe 23 can inject the water sample into the test package 6; the second limiting unit 26 is fixedly connected to the base 1 and arranged between the gasket 233 and the first connecting plate 7 to limit the movement of the first connecting plate 7 and the core sleeve 232. When the syringe 23 moves to the left, the second limiting unit 26 controls the syringe 23 to inject the water sample into the test package 6 by limiting the movement of the first connecting plate 7; when the syringe 23 moves to the right, the second limiting unit 26 limits the movement of the core sleeve 232 to restore the core rod 231 to its initial state. In this embodiment, the distance between the first limiting unit 25 and the second limiting unit 26 is 16 mm, the distance between the second limiting unit 26 and the base 1 is 40 mm, and the needle 234 is aligned with the test package 6 on the medicine wheel 3 .

[0056] Optionally, the automatic water quality detection device provided in this embodiment also includes a sealing block 9 and a second connecting plate 8 fixed to the base 1, the sealing block 9 is arranged between the needle 234 and the test pack 6, and the needle 234 can pass through the sealing block 9 to inject the water sample into the test pack 6 to prevent the water sample from leaking. The second connecting plate 8 is arranged between the medicine wheel 3 and the sampling injection mechanism 2, and the sealing block 9 is arranged on the second connecting plate 8, and the second connecting plate 8 is used to provide mounting support for the sealing block 9. In this embodiment, the sealing block 9 is clamped on the second connecting plate 8, and in other embodiments, the sealing block 9 can also be pasted on the second connecting plate 8. In the working state, during the movement of the sampling injection mechanism 2 to the left, due to the effect of pressure, the water sample will be discharged from the needle 234 before the needle 234 contacts the test pack 6, and the setting of the sealing block 9 can effectively prevent the water sample from leaking.

[0057] Alternatively, if Figure 5 As shown, the automatic water quality detection device provided in this embodiment also includes a camera 10, which is fixed on the base 1. The camera 10 is used to obtain a picture of the test package 6 after color development, and analyze the detection result through the obtained picture.

[0058] Continue to refer to Figure 5 This embodiment also provides a water quality automatic detection system, including the above-mentioned water quality automatic detection device for automatic sampling and automatic detection; and also includes a data processing device 100 and a control device 200. The data processing device 100 is composed of a data transmission unit, a data analysis unit, a data storage unit and a data display unit. The data processing device 100 can compare the image of the test package 6 after color development captured by the camera 10 with its built-in comparison image based on colorimetry and obtain the detection result. The control device 200 controls the opening of the water sample extraction power mechanism 11, the camera 10 taking pictures and the driving of the driving mechanism 4, and automatically alarms according to the display result of the data processing device 100.

[0059] The working process of the automatic water quality detection system provided in this embodiment is as follows:

[0060] (1) The control device 200 controls the water pump to start, and the water sample enters the syringe 23 from the water inlet 21 of the sampling injection mechanism 2.

[0061] In the present embodiment, the water outlet 22 of one of the two sampling injection mechanisms 2 is connected to the water inlet 21 of the other through a water pipe, so that one water pump can be used to simultaneously sample the two sampling injection mechanisms 2. In other embodiments, two water pumps can also be provided, which are respectively connected to the water inlets 21 of the two sampling injection mechanisms 2 to achieve separate sampling.

[0062] (2) After the water pump is turned on for 2 minutes, the air in the pipeline is exhausted, and the control device 200 controls the driving mechanism 4 to drive the sampling injection mechanism 2 and the transmission mechanism 5 to move to the left. During the movement to the left, the syringe 23 moves 16 mm as a whole, stops at the first limit unit 25, and the needle 234 aligned with the test package 6 is inserted into the test package 6. The first connecting plate 7 continues to compress the core rod 231 to move to the left, so that the spring 24 begins to compress 19 mm to the left, and stops at the second limit unit 26. The overall stroke of the cylinder is 35 mm; when the transmission mechanism 5 moves to the left, the ratchet assembly 52 will not drive the medicine wheel 3 to rotate.

[0063] (3) The control device 200 controls the driving mechanism 4 to move rightward, the spring 24 returns to its initial state with a stroke of 19 mm, and the first connecting plate 7 continues to move rightward, thereby driving the syringe 23 to move rightward as a whole and return to its initial state with an overall stroke of 35 mm; at the same time, the transmission mechanism 5 moves rightward, and the ratchet 521 and the active ratchet pawl 522 cooperate to rotate the medicine wheel 3 to a certain position, thereby achieving the purpose of replacing the test package 6.

[0064] (4) 10 minutes after the water sample is injected into the test package 6, the color development of the test package 6 is completed, and the control device 200 controls the camera 10 to take a picture and transmits the obtained picture data to the data processing device 100.

[0065] (5) The data processing device 100 compares the water sample image and the comparison image based on the colorimetric method according to the internal analysis program, analyzes and processes the test results, stores the data and displays them.

[0066] (6) According to the set program, the control device 200 automatically alarms when the COD test result is greater than 60 mg / L, and automatically alarms when the ammonia nitrogen test result is greater than 5 mg / L.

[0067] The automatic water quality detection system in this embodiment is set to take samples every 8 hours. The automatic water quality detection system can automatically take samples and automatically detect according to the set program, which improves the detection efficiency; it can also automatically alarm when the data is abnormal according to the detection results, so that the staff can find the problem in time and deal with it in time, which improves the work efficiency.

[0068] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The content of this specification should not be understood as limiting the present invention.

Claims

1. A water quality automatic detection device, characterized in that: include: Base (1); A sampling injection mechanism (2) is arranged on the base (1), and the sampling injection mechanism (2) is provided with a water inlet (21), and the water inlet (21) is used to obtain a water sample; A water sample extraction power mechanism (11), which is in communication with the water inlet (21), and the water sample extraction power mechanism (11) provides power for the sampling injection mechanism (2) to obtain the water sample; A test pack (6), the test pack (6) being arranged on the base (1), and the sampling injection mechanism (2) being capable of injecting the water sample therein into the test pack (6); A driving mechanism (4), wherein the driving mechanism (4) is capable of driving the sampling and injection mechanism (2) to inject the water sample into the test package (6); A medicine wheel (3), the medicine wheel (3) being rotatably arranged on the base (1), and the test packs (6) being evenly arranged on the medicine wheel (3); A transmission mechanism (5), wherein the transmission mechanism (5) is capable of driving the medicine wheel (3) to rotate, and the driving mechanism (4) is capable of driving the transmission mechanism (5) to move; a first connecting plate (7), the sampling and injection mechanism (2), the transmission mechanism (5) and the driving mechanism (4) being respectively connected to the first connecting plate (7), so that the driving mechanism (4) can simultaneously drive the sampling and injection mechanism (2) and the transmission mechanism (5) to operate; a sealing block (9), the sealing block (9) being arranged between the needle (234) and the test pack (6), the needle (234) being able to penetrate the sealing block (9) to inject the water sample into the test pack (6); It also comprises a second connecting plate (8) fixed on the base (1), the second connecting plate (8) being arranged between the medicine wheel (3) and the sampling injection mechanism (2), and the sealing block (9) being arranged on the second connecting plate (8); It also comprises a camera (10), the camera (10) being fixed on the base (1), and the camera (10) being used to obtain a picture of the test package (6) after color development.

2. The automatic water quality detection device according to claim 1, characterized in that: The transmission mechanism (5) comprises: A transmission rod (51), wherein the transmission rod (51) is connected to the driving mechanism (4); A ratchet assembly (52), wherein the ratchet assembly (52) comprises a ratchet wheel (521) and an active pawl (522), wherein the ratchet wheel (521) is connected to the medicine wheel disc (3), the active pawl (522) is arranged on one side of the ratchet wheel (521), and the active pawl (522) is connected to the transmission rod (51), and the ratchet assembly (52) is used to drive the medicine wheel disc (3) to rotate in one direction.

3. The automatic water quality detection device according to claim 1, characterized in that: The sampling injection mechanism (2) comprises: A syringe (23), the syringe (23) comprising a core rod (231), a core sleeve (232), a gasket (233) and a needle (234); one end of the core sleeve (232) is provided with the needle (234) which is in communication with the core sleeve (232), and the other end is fixedly connected with the gasket (233); the core rod (231) passes through the gasket (233) and extends into the core sleeve (232), and the core rod (231) can reciprocate in the core sleeve (232); a spring (24), wherein the spring (24) is sleeved on the core rod (231), and the spring (24) is located between the first connecting plate (7) and the gasket (233), and is used to restore the syringe (23) to its original position; a first limiting unit (25), which is arranged on the core sleeve (232), the first limiting unit (25) being fixedly connected to the base (1) and used for limiting the movement of the core sleeve (232); A second limiting unit (26), the second limiting unit (26) is fixedly connected to the base (1) and is arranged between the gasket (233) and the first connecting plate (7), and is used to limit the movement of the first connecting plate (7) and the core sleeve (232).

4. A water quality automatic detection system, characterized in that: The invention comprises the automatic water quality detection device according to any one of claims 1 to 3.

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