A water quality rapid detection tester

Abstract

The present invention provides a rapid water quality detection tester, which belongs to the field of water quality detection. The tester includes a suction cylinder and a piston for extracting water samples, and the reagent holding unit includes a mounting block, a reagent holding tank, a through hole and a sealing film; the mounting block is provided with a reagent holding tank near the side wall of the suction cylinder, and the suction cylinder is provided with a through hole, the through hole connecting the reagent holding tank and the inner part of the suction cylinder, the sealing film is fixedly installed on the inner wall of the suction cylinder at the through hole, and the sealing film seals the through hole; the reagent releasing unit includes a puncture needle, and the puncture needle punctures the sealing film. The present application can store reagents by setting up a reagent holding tank. After the water sample is sucked into the suction cylinder, the sealing film is punctured by the puncture needle, so that the reagent reacts with the water sample, thereby achieving rapid water quality detection.

Description

Technical Field

[0001] The invention belongs to the field of water quality detection, and in particular relates to a water quality rapid detection tester. Background Art

[0002] With increasing awareness of the environment and the tightening of environmental regulations, the demand for rapid on-site water quality testing technology is growing. Currently, rapid testing methods primarily consist of rapid test kits and rapid test probes. The former suffers from low accuracy, susceptibility to failure, and vulnerability to changes in suspended particulate matter concentrations. The latter, on the other hand, is cumbersome to maintain and inconvenient to carry.

[0003] Therefore, the shortcomings of the current rapid detection device are that it cannot take into account both portability and a certain degree of detection accuracy. Summary of the Invention

[0004] In view of the above-mentioned shortcomings of the prior art, the object of the present invention is to provide a water quality rapid detection tester to solve the problem that the existing rapid detection devices cannot achieve both certain detection accuracy and low cost.

[0005] To achieve the above-mentioned and other related purposes, the present invention provides a water quality rapid detection tester, the tester comprising:

[0006] The suction cylinder unit comprises a suction cylinder and a piston; a water sample inlet is provided at the bottom of the suction cylinder, an outer wall of the piston is fitted with an inner wall of the suction cylinder, and the piston slides along the axis of the suction cylinder;

[0007] A plurality of reagent holding units are sequentially arranged from top to bottom along the axis direction of the absorption cylinder, and the reagent holding units include a mounting block, a reagent holding groove, a through hole, and a sealing film; the mounting block is fixedly mounted on the outer wall of the absorption cylinder, the mounting block is provided with a reagent holding groove near the side wall of the absorption cylinder, the absorption cylinder is provided with a through hole, the through hole connects the reagent holding groove and the absorption cylinder, the sealing film is fixedly mounted on the inner wall of the absorption cylinder at the through hole, and the sealing film seals the through hole;

[0008] The reagent releasing unit is arranged below the piston and comprises a puncture needle for puncturing the sealing film.

[0009] As an optional solution, the suction cylinder unit further includes a piston rod, the top of the suction cylinder is open, one end of the piston rod is fixedly mounted on the piston, and the other end of the piston rod passes through the opening and extends out of the suction cylinder.

[0010] As an optional solution, the suction cylinder unit further includes a rigid water suction pipe and a filter plate;

[0011] The rigid water suction pipe is fixedly mounted on the bottom wall of the suction cylinder, and the rigid water suction pipe passes through the suction cylinder and is connected to the inside of the suction cylinder;

[0012] The filter plate is fixedly installed in the rigid water suction pipe.

[0013] As an optional solution, the suction cylinder unit further includes a cover and a sealing ring;

[0014] The cover body is threadedly connected to the rigid water suction pipe, and the cover body is used to open and close the rigid water suction pipe. The sealing ring is placed on the inner bottom wall of the cover body, and the sealing ring seals the cover body and the rigid water suction pipe.

[0015] As an optional solution, the reagent release unit includes a first mounting ring, a second mounting ring, a limiting block, a limiting groove, a connecting groove, a connecting rope, a first groove, a second groove and a spring;

[0016] The first mounting ring and the second mounting ring are both located below the piston, and the outer wall of the first mounting ring is in contact with the inner wall of the suction cylinder;

[0017] A limiting groove is provided on the outer wall of the first mounting ring, the communicating groove communicates with the bottom wall of the limiting groove and the lower end surface of the first mounting ring, and the length of the limiting groove is greater than the length of the communicating groove;

[0018] The limiting block is fixedly installed at the bottom of the suction cylinder, the limiting block cooperates with the limiting groove, and the length of the limiting block is less than or equal to the length of the connecting groove;

[0019] The second mounting ring is located inside the first mounting ring, and the outer wall of the second mounting ring is in contact with the inner wall of the first mounting ring;

[0020] A first groove is formed on the inner wall of the first mounting ring, and the upper wall of the first groove is in contact with the top wall of the first mounting ring;

[0021] A second groove is formed on the outer wall of the second mounting ring, and the puncture needle is slidably mounted in the second groove, the puncture end of the puncture needle extends into the first groove, and a spring is fixedly connected between the bottom end surface of the puncture needle and the second groove;

[0022] One end of the connecting rope is fixedly connected to the bottom end surface of the piston, and the other end of the connecting rope is fixedly connected to the upper end surface of the second mounting ring. The length of the connecting rope is a, and the maximum height of the water sample sucked in the suction cylinder is b, a>b.

[0023] As an optional solution, the sealing film is made of a stretchable material, and the volume of the reagent containing tank is larger than the volume of the reagent contained therein.

[0024] As an optional solution, the reagent release unit also includes a plurality of connecting columns, one end of which is fixedly connected to the bottom end surface of the piston, and the other end of which is fixedly connected to the upper end surface of the second mounting ring, and the material of the connecting column is a breakable material.

[0025] As an optional solution, the width of the first groove is equal to the diameter of the puncture needle.

[0026] As an optional solution, the tester further includes a colorimetric card, which is fixed to the outer wall of the suction cylinder, and the suction cylinder is made of a transparent material.

[0027] As described above, the rapid water quality tester of the present invention has at least the following beneficial effects:

[0028] 1. The present invention places the reagent in the reagent holding tank. After the water sample is sucked into the aspiration cylinder, the sealing film of the reagent holding tank can be pierced by a puncture needle to mix the reagent and the water sample, thereby making the tester convenient to carry. At the same time, the reagent in the reagent holding tank can be quantitatively measured to ensure the accuracy of the test.

[0029] 2. Since the reagent may be corrosive to a certain extent, the present application provides a cover body. After the water sample is absorbed into the aspiration cylinder, the cover body is closed and the aspiration cylinder is shaken to prevent the unreacted reagent from falling out with the water sample during the reaction process of the reagent, thereby ensuring the safety of the test;

[0030] 3. The present application provides a cover body. After the water sample is sucked into the suction cylinder, the cover body is closed and the piston rod is continuously pulled to drive the piston to move outward. Since the length of the connecting rope is greater than the maximum height of the water sample, a gap is formed between the piston and the water sample surface. At this time, the pressure in the gap is less than the atmospheric pressure, and the sealing film can be sucked into the suction cylinder, thereby making the sealing film concave inward and taut. The piston continues to move outward, and the puncture needle can pierce the sealing film conveniently and reliably, thereby ensuring that the detection can be carried out reliably.

[0031] 4. After the sealing film is pierced, the pressure inside the absorption cylinder decreases, so the reagent in the reagent holding tank can be sprayed into the absorption cylinder, which is convenient for mixing and accelerates the reaction speed of the reagent and the water sample. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 Shown is a schematic structural diagram of the present invention;

[0033] Figure 2 Shown is a cross-sectional view of the structure of the present invention;

[0034] Figure 3 Shown as the present invention Figure 2 A local enlarged view of point A in FIG;

[0035] Figure 4 Shown as the present invention Figure 2 A local enlarged view of point B in FIG;

[0036] Figure 5 Shown as the present invention Figure 2 A local enlarged view of point C in FIG;

[0037] Figure 6 Shown is a schematic structural diagram of the piston, the first mounting ring, and the second mounting ring of the present invention;

[0038] Figure 7 Shown as the present invention Figure 6 A local enlarged view of point D in FIG.

[0039] In the figure: 101. Suction cylinder; 102. Piston; 103. Piston rod; 104. Rigid suction pipe; 105. Filter plate; 106. Cover; 107. Sealing ring;

[0040] 201. Mounting block; 202. Reagent holding tank; 203. Through hole; 204. Sealing film;

[0041] 301. Puncture needle; 302. First mounting ring; 303. Second mounting ring; 304. Stop block; 305. Stop slot; 306. Connecting slot; 307. Connecting rope; 308. First groove; 309. Second groove; 310. Spring; 311. Connecting column;

[0042] 4. Color chart. DETAILED DESCRIPTION

[0043] The following describes the implementation of the present invention through specific embodiments. People skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0044] See also Figures 1 to 7. It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention. Therefore, they have no substantive technical significance. Any modification of the structure, change in the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the efficacy and purpose that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0045] The following embodiments are for illustration only and can be combined with each other, and are not limited to the contents presented in the following single embodiments.

[0046] The determination of total phosphorus is to determine the total content of phosphorus in water, and is the main means of evaluating the nutrient level of water. In this embodiment, the detection of total phosphorus in water samples is taken as an example.

[0047] See also Figures 1 to 7 The present invention provides a water quality rapid detection tester, the tester comprising:

[0048] The tester comprises:

[0049] The suction cylinder unit includes a suction cylinder 101 and a piston 102; a water sample inlet is provided at the bottom of the suction cylinder 101, the outer wall of the piston 102 is in contact with the inner wall of the suction cylinder 101, and the piston 102 slides along the axis of the suction cylinder 101. A scale can also be provided on the outer wall of the suction cylinder 101 to indicate the volume of the water sample taken;

[0050] A plurality of reagent holding units, wherein the plurality of reagent holding units are sequentially arranged from top to bottom along the axis direction of the absorption cylinder 101. In the determination of total phosphorus in a water sample, the number of reagent holding units is 3, and the reagents contained therein are, from bottom to top, sulfuric acid, ascorbic acid solution, and molybdate, respectively; or the number of reagent holding units is 2, and the reagents contained therein are, from bottom to top, sulfuric acid-ammonium molybdate mixed solution and ascorbic acid solution, respectively;

[0051] The reagent holding unit includes a mounting block 201, a reagent holding groove 202, a through hole 203, and a sealing film 204; the mounting block 201 is fixedly mounted on the outer wall of the aspirating cylinder 101, and the mounting block 201 is provided with a reagent holding groove 202 near the side wall of the aspirating cylinder 101. The color of the mounting block 201 is dark, such as brown or brown.

[0052] The aspirating cylinder 101 is provided with a through hole 203, which connects the reagent holding tank 202 with the aspirating cylinder 101. The sealing film 204 is fixedly mounted on the inner wall of the aspirating cylinder 101 at the through hole 203. The sealing film 204 seals the through hole 203. When no measurement is being performed, the sealing film seals the through hole 203, and the reagent stored in the reagent holding tank 202 does not leak out.

[0053] The reagent releasing unit is disposed below the piston 102 and includes a puncture needle 301 , which is used to puncture the sealing film 204 .

[0054] Slide the piston 102 to take a water sample into the suction cylinder 101. After the water sample is taken, the puncture needle 301 first pierces the sealing film 204 of the lowest reagent holding unit to mix the first reagent with the water sample, and then the puncture needle 301 pierces the sealing films 204 of the remaining reagent holding units in turn, thereby adding the remaining reagents to the water sample in turn. By observing the color of the water sample after the reaction, the orthophosphate content in the water sample can be quickly determined, and the orthophosphate can be multiplied by an empirical coefficient to obtain the total phosphorus content. At the same time, the amount of reagent in the reagent holding tank 202 is fixed. By controlling the volume of the water sample extracted by the suction cylinder 101, the accuracy of the entire test process can be guaranteed.

[0055] In this embodiment, please refer to Figures 1 to 7 The suction cylinder unit also includes a piston rod 103. The top of the suction cylinder 101 is open, one end of the piston rod 103 is fixedly mounted on the piston 102, and the other end of the piston rod 103 passes through the opening and extends out of the suction cylinder 101.

[0056] By pulling the piston rod 103 , the piston 102 can be pulled to move.

[0057] In this embodiment, please refer to Figures 1 to 7 , the suction cylinder unit further includes a rigid water suction pipe 104 and a filter plate 105;

[0058] The rigid water suction pipe 104 is fixedly mounted on the bottom wall of the suction cylinder 101 , and the rigid water suction pipe 104 passes through the suction cylinder 101 and communicates with the inside of the suction cylinder 101 ;

[0059] The filter plate 105 is fixedly installed in the rigid water suction pipe 104 .

[0060] The filter plate 105 is provided to filter out impurities from the water sample drawn into the suction cylinder 101 .

[0061] In this embodiment, please refer to Figures 1 to 7, the suction cylinder unit further includes a cover 106 and a sealing ring 107;

[0062] The cover 106 is threadedly connected to the rigid water suction pipe 104 and is used to open and close the rigid water suction pipe 104 . The sealing ring 107 is placed on the inner bottom wall of the cover 106 and seals the cover 106 and the rigid water suction pipe 104 .

[0063] The cover 106 and the sealing ring 107 are provided to lock the water suction end of the rigid water suction pipe 104 and seal the rigid water suction pipe 104;

[0064] Since the reagents may be corrosive to a certain extent, and the three reagents are added in different batches, and after adding the reagents, it is necessary to wait for the reagents to react with the water sample, by locking and sealing the rigid water suction tube 104, the suction cylinder 101 can be shaken when the reagents react with the water sample, thereby speeding up the mixing speed, and the water sample mixed with the reagents will not splash out, thereby avoiding harm to personnel.

[0065] In this embodiment, please refer to Figures 1 to 7 The reagent release unit includes a first mounting ring 302, a second mounting ring 303, a limiting block 304, a limiting groove 305, a connecting groove 306, a connecting rope 307, a first groove 308, a second groove 309 and a spring 310;

[0066] The first mounting ring 302 and the second mounting ring 303 are both located below the piston 102 , and the outer wall of the first mounting ring 302 fits in contact with the inner wall of the suction cylinder 101 ;

[0067] The outer wall of the first mounting ring 302 is provided with a limiting groove 305, and the connecting groove 306 connects the bottom wall of the limiting groove 305 with the lower end surface of the first mounting ring 302. The length of the limiting groove 305 is greater than that of the connecting groove 306.

[0068] The limiting block 304 is fixedly mounted on the bottom of the suction cylinder 101 , and the limiting block 304 cooperates with the limiting groove 305 . The length of the limiting block 304 is less than or equal to the length of the connecting groove 306 .

[0069] The second mounting ring 303 is located inside the first mounting ring 302 , and the outer wall of the second mounting ring 303 is in contact with the inner wall of the first mounting ring 302 ;

[0070] A first groove 308 is formed on the inner wall of the first mounting ring 302 , and the upper wall of the first groove 308 is in contact with the top wall of the first mounting ring 302 ;

[0071] A guiding slope is provided on the upper portion of the first groove 308. The angle of the plane on which the guiding slope is located is an obtuse angle with the axis of the puncture needle. Through the provided guiding slope, when the puncture needle 301 moves out of the first groove 308, the elastic force of the spring 310 is gradually released. When the puncture needle 301 completely moves out of the first groove 308, the outward movement speed of the puncture needle 301 will be low, which can prevent the puncture needle from puncturing the inner wall of the aspiration cylinder 101. A second groove 309 is provided on the outer wall of the second mounting ring 303. The puncture needle 301 is slidably mounted in the second groove 309. The puncture end of the puncture needle 301 extends into the first groove 308. The spring 310 is fixedly connected between the bottom end surface of the puncture needle 301 and the second groove 309.

[0072] One end of the connecting rope 307 is fixedly connected to the bottom end surface of the piston 102, and the other end of the connecting rope 307 is fixedly connected to the upper end surface of the second mounting ring 303. The length of the connecting rope 307 is a, and the maximum height of the water sample sucked into the suction cylinder 101 is b, where a>b;

[0073] At the same time, the total height of the suction cylinder 101 is d, the distance between the lower end surface of the lowest reagent holding tank 202 and the upper end surface of the uppermost reagent holding tank 202 is e, and a+e <d。

[0074] Driven by the spring 310, the puncture needle 301 enters the first groove 308. Due to the friction between the end of the puncture needle 301 and the side wall of the first groove 308, the second mounting ring 303 and the first mounting ring 302 on which the puncture needle 301 is mounted can be temporarily connected as a whole, making it easy to place the puncture needle 301, the second mounting ring 303 and the first mounting ring 302 into the suction cylinder 101. After the first mounting ring 302 is placed into the suction cylinder 101, the limiting block 304 is aligned with the connecting groove 306, and the limiting block 304 is placed into the limiting groove 305 through the connecting groove 306, thereby locking the first mounting ring 302 at the bottom of the suction cylinder 101.

[0075] The piston 102 is pulled outward to slide and the water sample is drawn into the suction cylinder 101. At this time, due to the long length of the connecting rope 307, the second mounting ring 303 will not be driven to move outward, so that the puncture needle 301 remains in the first groove 308. When the water sample is taken, the cover 106 is closed to seal and lock the rigid water suction tube 104, and the piston 102 is continued to be pulled outward, so that the pressure in the suction cylinder 101 becomes low. At this time, the connecting rope 307 will be straightened, and the piston 102 will be continued to be pulled, which will drive the second mounting ring 303 to move outward, so that the puncture needle 301 moves out of the first groove 308, and the puncture needle 301 extends outward under the drive of the spring 310, and the end of the puncture needle 301 is in contact with the inner wall of the suction cylinder 101. The piston 102 continues to move outward and causes the puncture needle 301 to pierce the sealing film 204, so that the reagent enters the suction cylinder 101.

[0076] In this embodiment, please refer to Figures 1 to 7 , the material of the sealing film 204 is a stretchable material, and the material of the sealing film 204 here can be polyvinyl chloride film, polyethylene film, polyester film or polypropylene film, etc.;

[0077] The volume of the reagent containing tank 202 is larger than the volume of the reagent contained therein, that is, the reagent containing tank 202 is not filled with reagent, and the remaining space in the reagent containing tank 202 is filled with air.

[0078] By making the sealing film 204 of a stretchable material, after the cover 106 and the sealing ring 107 seal the rigid water suction tube 104, pulling the piston 102 will reduce the pressure in the suction cylinder 101, thereby causing the sealing film 204 to bulge outward, making it easier for the puncture needle 301 to perform puncture.

[0079] In this embodiment, please refer to Figures 1 to 7 The reagent release unit also includes a plurality of connecting columns, one end of which is fixedly connected to the bottom end surface of the piston 102, and the other end of which is fixedly connected to the upper end surface of the second mounting ring 303. The material of the connecting column is a breakable material. Here, the connecting column can be an aluminum column with a smaller diameter, or polyethylene with a smaller diameter, etc.

[0080] By setting up a number of connecting columns, the second mounting ring 303 and the piston 102 can be temporarily connected into a whole. At the same time, through the spring 310 and the puncture needle 301, the second mounting ring 303 and the first mounting ring 302 can also be temporarily connected into a whole. Therefore, the piston 102, the second mounting ring 303 and the first mounting ring 302 can be temporarily connected into a whole before the test, which facilitates the installation of the puncture needle 301 into the absorption cylinder 101.

[0081] In this embodiment, please refer to Figures 1 to 7, the width of the first groove 308 is equal to the diameter of the puncture needle 301.

[0082] When not testing, the puncture needle 301 enters the first groove 308 driven by the spring 310. When the piston 102 is rotated, the puncture needle 301 will be limited by the first groove 308, so that the connecting column can be easily broken.

[0083] In this embodiment, please refer to Figures 1 to 7 The tester further includes a colorimetric card 4, which is fixed to the outer wall of the suction cylinder 101. The suction cylinder 101 is made of a transparent material.

[0084] The colorimetric card 4 is provided to facilitate colorimetry after the reagent reaction, thereby facilitating rapid detection of total phosphorus in water quality.

[0085] To sum up, in the present invention, the piston rod 103 is pulled to extract the water sample into the suction cylinder 101 through the piston 102. After the water sample is taken, the cover body 106 covers the rigid water suction tube 104, thereby locking the suction cylinder 101, and the piston rod 103 is continued to be pulled to straighten the connecting rope 307, and the piston rod 103 is continued to be pulled to move the puncture needle 301 upward out of the first groove 308, and the piston rod 103 is continued to be pulled to move the puncture needle 301 upward and pierce the sealing film 204 from bottom to top in sequence, so that the reagent enters the suction cylinder 101 in sequence and mixes with the water sample to react. By comparing the color of the water sample after the reaction with the colorimetric card, the orthophosphate content in the water sample can be quickly determined, and the orthophosphate is multiplied by an empirical coefficient to obtain the total phosphorus content in the water sample, thereby quickly reflecting the total phosphorus content in the water sample.

[0086] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed herein are intended to be covered by the claims of the present invention.

Claims

1. A water quality rapid detection tester, characterized in that: The tester comprises: The suction cylinder unit comprises a suction cylinder and a piston; a water sample inlet is provided at the bottom of the suction cylinder, an outer wall of the piston is fitted with an inner wall of the suction cylinder, and the piston slides along the axis of the suction cylinder; A plurality of reagent holding units are sequentially arranged from top to bottom along the axis direction of the absorption cylinder, and the reagent holding units include a mounting block, a reagent holding groove, a through hole, and a sealing film; the mounting block is fixedly mounted on the outer wall of the absorption cylinder, the mounting block is provided with a reagent holding groove near the side wall of the absorption cylinder, the absorption cylinder is provided with a through hole, the through hole connects the reagent holding groove and the absorption cylinder, the sealing film is fixedly mounted on the inner wall of the absorption cylinder at the through hole, and the sealing film seals the through hole; The reagent releasing unit is arranged below the piston and comprises a puncture needle for puncturing the sealing film.

2. A water quality rapid detection tester according to claim 1, characterized in that: The suction cylinder unit further comprises a piston rod. The top of the suction cylinder is open. One end of the piston rod is fixedly mounted on the piston, and the other end of the piston rod passes through the opening and extends out of the suction cylinder.

3. A water quality rapid detection tester according to claim 1, characterized in that: The suction cylinder unit also includes a rigid water suction pipe and a filter plate; The rigid water suction pipe is fixedly mounted on the bottom wall of the suction cylinder, and the rigid water suction pipe passes through the suction cylinder and is connected to the inside of the suction cylinder; The filter plate is fixedly installed in the rigid water suction pipe.

4. A water quality rapid detection tester according to claim 3, characterized in that: The suction cylinder unit also includes a cover and a sealing ring; The cover body is threadedly connected to the rigid water suction pipe, and the cover body is used to open and close the rigid water suction pipe. The sealing ring is placed on the inner bottom wall of the cover body, and the sealing ring seals the cover body and the rigid water suction pipe.

5. A water quality rapid detection tester according to claim 1, characterized in that: The reagent release unit includes a first mounting ring, a second mounting ring, a limiting block, a limiting groove, a connecting groove, a connecting rope, a first groove, a second groove and a spring; The first mounting ring and the second mounting ring are both located below the piston, and the outer wall of the first mounting ring is in contact with the inner wall of the suction cylinder; A limiting groove is formed on the outer wall of the first mounting ring, the communicating groove communicates with the bottom wall of the limiting groove and the lower end surface of the first mounting ring, and the length of the limiting groove is greater than the length of the communicating groove; The limiting block is fixedly installed at the bottom of the suction cylinder, the limiting block cooperates with the limiting groove, and the length of the limiting block is less than or equal to the length of the connecting groove; The second mounting ring is located inside the first mounting ring, and the outer wall of the second mounting ring is in contact with the inner wall of the first mounting ring; A first groove is formed on the inner wall of the first mounting ring, and the upper wall of the first groove is in contact with the top wall of the first mounting ring; A second groove is formed on the outer wall of the second mounting ring, and the puncture needle is slidably mounted in the second groove, the puncture end of the puncture needle extends into the first groove, and a spring is fixedly connected between the bottom end surface of the puncture needle and the second groove; One end of the connecting rope is fixedly connected to the bottom end surface of the piston, and the other end of the connecting rope is fixedly connected to the upper end surface of the second mounting ring. The length of the connecting rope is a, and the maximum height of the water sample sucked in the suction cylinder is b, a>b.

6. A water quality rapid detection tester according to claim 1, characterized in that: The sealing film is made of a stretchable material, and the volume of the reagent containing tank is greater than the volume of the reagent contained therein.

7. A water quality rapid detection tester according to claim 5, characterized in that: The reagent release unit further includes a plurality of connecting columns, one end of each connecting column is fixedly connected to the bottom end surface of the piston, and the other end of each connecting column is fixedly connected to the upper end surface of the second mounting ring. The connecting column is made of a breakable material.

8. A water quality rapid detection tester according to claim 5, characterized in that: The width of the first groove is equal to the diameter of the puncture needle.

9. A water quality rapid detection tester according to claim 1, characterized in that: The tester further comprises a colorimetric card, which is fixed on the outer wall of the suction cylinder, and the suction cylinder is made of a transparent material.

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