Total phosphorus and total nitrogen tester

Abstract

The utility model discloses a total phosphorus and total nitrogen determinator, which comprises a rack provided with a placing area; the pressure device comprises a pressure tank, a cover body, a cover turning mechanism and a locking mechanism, the pressure tank is arranged on the rack, the cover turning mechanism is arranged on the rack, the cover turning mechanism comprises a rotating frame and a cover turning motor, the cover body is rotatably arranged on the rotating frame, and the cover turning motor is in transmission connection with the rotating frame; the locking mechanism is arranged on the rotating frame, the locking mechanism comprises a locking motor, and the locking motor is in transmission connection with the cover body; the liquid taking mechanism at least comprises a liquid taking needle and an injection pump, and the injection pump is arranged on the rack; the liquid taking needle is arranged on the rack, the moving mechanism is arranged on the rack, the liquid taking needle is arranged on the moving mechanism, and a rotating gripper is further arranged on the moving mechanism. The device can be used for automatically treating a water sample and detecting total phosphorus and total nitrogen.

Description

Technical Field

[0001] The utility model relates to the technical field of detection devices, in particular to a total phosphorus and total nitrogen measuring instrument. Background Art

[0002] Eutrophication of water bodies is a phenomenon of water aging. Large amounts of nitrogen and phosphorus discharge will cause eutrophication of water bodies. Therefore, my country uses total nitrogen and total phosphorus as important assessment indicators for evaluating the treatment effect of sewage treatment plants. Total nitrogen (TN): Nitrogen compounds in sewage are divided into organic nitrogen, ammonia nitrogen, nitrite nitrogen, and nitrate nitrogen. The total amount of the four nitrogen compounds is called total nitrogen (TN). Kjeldahl nitrogen (TKN) is the sum of organic nitrogen and ammonia nitrogen. Total phosphorus is the result of the determination of various forms of phosphorus in the water sample after digestion, which is converted into orthophosphate. It is measured in milligrams of phosphorus per liter of water sample, and is the sum of phosphorus in inorganic form (inorganic phosphorus) and organic form (organic phosphorus). When determining the total phosphorus in water, potassium persulfate is needed to digest the sample, and the digestion process needs to be carried out under high temperature and high pressure. When determining the total nitrogen in water, potassium persulfate can decompose to produce potassium hydrogen sulfate and atomic oxygen in an aqueous solution above 120°C. Potassium hydrogen sulfate dissociates in the solution to produce hydrogen ions, so the decomposition process can be completed in the alkaline medium of sodium hydroxide. Under certain conditions, the decomposed atomic oxygen can convert the nitrogen element in the water sample containing the nitrogen compound into nitrate. When large-scale water quality testing is required, manual processing of water samples and testing is labor-intensive for operators and affects the detection efficiency. Therefore, a total phosphorus and total nitrogen tester is needed that can automatically process and test water samples. Utility Model Content

[0003] The utility model provides a total phosphorus and total nitrogen measuring instrument, which can automatically process water samples and detect total phosphorus and total nitrogen.

[0004] In order to solve the above technical problems, the utility model provides a total phosphorus and total nitrogen measuring instrument, which is characterized by comprising:

[0005] The rack is provided with a placement area, wherein the placement area is used to place water samples and reagents;

[0006] The pressure device comprises a pressure tank, a cover body, a flip mechanism and a locking mechanism, wherein the pressure tank is arranged on the frame, the flip mechanism is arranged on the frame, the flip mechanism comprises a rotating frame and a flip motor, the cover body is rotatably arranged on the rotating frame, the flip motor is transmission-connected with the rotating frame, and the flip standby can drive the cover body to flip to a first position and a second position; the locking mechanism is arranged on the rotating frame, the locking mechanism comprises a locking motor, the locking motor is transmission-connected with the cover body, and the locking motor can drive the cover body to rotate to a second position and a third position, and when the cover body is in the third position, the cover body and the pressure tank are sealed and connected.

[0007] The liquid collection mechanism at least comprises a liquid collection needle and a syringe pump, wherein the liquid collection needle is connected to the syringe pump, the syringe pump is arranged on the frame, and the position of the liquid collection needle corresponds to the position of the placement area;

[0008] A moving mechanism, wherein the moving mechanism is arranged on the frame, the liquid collection needle is arranged on the moving mechanism, the moving mechanism is used to drive the liquid collection needle to move, and a rotating gripper is also arranged on the moving mechanism.

[0009] As a preferred embodiment of the above technical solution, the placement area is provided with a tray, the tray is used to place water sample bottles, the water sample bottles are provided with bottle caps, the position of the rotating gripper corresponds to the position of the bottle cap, the rotating gripper is used to twist the bottle cap, and a number of reagent bottles are also provided on the placement area.

[0010] As a preferred embodiment of the above technical solution, the opening of the pressure tank extends outward to form a plurality of first locking portions, and the opening of the cover body extends inward to form a plurality of second locking portions, and when the cover body is in the third position, the lower portion of the first locking portion abuts against the upper portion of the second locking portion.

[0011] As a preferred embodiment of the above technical solution, a pressure sensor and a temperature sensor are provided in the pressure tank, and an exhaust valve is also provided at the pressure sensor.

[0012] As a preferred embodiment of the above technical solution, an electric heating tube is provided inside the pressure tank, and the electric heating tube is located at the lower part of the pressure tank. A water level sensor is provided inside the pressure tank, and the position of the water level sensor corresponds to the position of the electric heating tube. The pressure tank is also provided with a water inlet pipe, and the water inlet pipe passes through the pressure tank and extends into the interior of the pressure tank. A water inlet valve is also provided on the water inlet pipe, and the water inlet valve is provided outside the pressure tank.

[0013] As a preferred embodiment of the above technical solution, the locking mechanism includes a locking gear, a locking rack is provided on the cover body, the locking gear is meshed with the locking rack, and the locking motor is transmission-connected with the locking gear.

[0014] As a preferred embodiment of the above technical solution, a protective plate is provided on the frame, and the position of the protective plate corresponds to the position of the pressure device.

[0015] As a preferred embodiment of the above technical solution, the liquid collection mechanism also includes a multi-way rotary valve and a water pump. When the multi-way rotary valve is in a first position, the liquid collection needle is connected to the injection pump. When the multi-way rotary valve is in a second position, the liquid collection needle is connected to the water pump. The water pump is used to connect to a water tank.

[0016] As a preferred embodiment of the above technical solution, the liquid collection mechanism further includes a cleaning tank, the position of the cleaning tank corresponds to the position of the liquid collection needle, and a drain port is provided at the bottom of the cleaning tank.

[0017] As a preferred embodiment of the above technical solution, the moving mechanism includes an X-axis moving mechanism, a Y-axis moving mechanism and a Z-axis moving mechanism, the X-axis moving mechanism includes an X-axis moving guide rail and an X-axis driving device, the Y-axis moving mechanism is installed on the X-axis moving guide rail, and the X-axis driving device drives the Y-axis moving mechanism to slide on the X-axis moving guide rail, the Y-axis moving mechanism includes a Y-axis moving guide rail and a Y-axis driving device, the Z-axis moving mechanism includes a Z-axis guide block, a first Z-axis driving device and a second Z-axis driving device, the Z-axis guide block and the Z-axis guide block are installed on the Y-axis moving guide rail, the Y-axis driving device drives the Z-axis moving mechanism to slide on the Y-axis moving guide rail, the liquid collection needle is installed on the Z-axis guide block, the first Z-axis driving device drives the liquid collection needle to slide on the Z-axis guide block, the rotating gripper is installed on the Z-axis guide block, and the second Z-axis driving device drives the rotating gripper to slide on the Z-axis guide block.

[0018] The utility model provides a total phosphorus and total nitrogen determination instrument, comprising: a frame, a pressure device, a liquid taking mechanism and a moving mechanism. When in use, a covered water sample bottle containing a water sample and a reagent bottle containing relevant reagents are first placed in the placement area, the moving mechanism drives the rotating gripper to grab the covered water sample bottle to the position of the fixed gripper, the fixed gripper clamps the water sample bottle, the rotating gripper unscrews the water sample cover, after unscrewing, the rotating gripper with cover is removed, the liquid taking needle on the moving mechanism moves to the reagent bottle, absorbs the reagent and drips it into the water sample bottle, the rotating gripper transfers the water sample bottle cover to the top of the water sample bottle again, the rotating gripper grabs the bottle cover and covers it tightly The water sample bottle is then grabbed and placed in the pressure tank. After all the water samples are placed in the pressure tank, the flip motor drives the rotating frame to rotate, thereby driving the cover body to flip from the first position to the second position, and then the locking motor drives the cover body to rotate from the second position to the third position to complete the connection between the cover body and the pressure tank, and a sealing ring is provided at the opening of the cover body, and the sealing ring is used to seal the joint between the cover body and the pressure tank; when opening the cover, the locking motor drives the cover body to rotate from the third position to the second position, and then the flip motor drives the cover body to flip from the second position to the first position. The moving mechanism drives the rotating gripper to grab the water sample bottle in the pressure tank and place it in the placement area, and then the rotating gripper opens the bottle cap, and the moving mechanism drives the liquid collection needle to move to the reagent bottle, absorbs the reagent and drips it into the water sample bottle to further process the water sample; after the water sample processing is completed, the moving mechanism drives the liquid collection needle to move to the water sample bottle, extracts the water sample from the water sample bottle, and injects it into an external spectrophotometer or other detection equipment for detection; the total phosphorus and total nitrogen analyzer can automatically process and detect water samples, reduce the labor intensity of operators, and improve detection efficiency.

[0019] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the three-dimensional structure of a total phosphorus and total nitrogen measuring instrument in an embodiment of the utility model;

[0021] Figure 2 This is a schematic diagram of the structure of a total phosphorus and total nitrogen measuring instrument in an embodiment of the utility model;

[0022] Figure 3 This is a schematic diagram of the structure of a total phosphorus and total nitrogen measuring instrument in an embodiment of the utility model;

[0023] Figure 4 It is a schematic diagram of the three-dimensional structure of a pressure device of a total phosphorus and total nitrogen measuring instrument in an embodiment of the utility model;

[0024] Figure 5 It is a schematic diagram of the three-dimensional structure of a pressure device of a total phosphorus and total nitrogen measuring instrument in an embodiment of the utility model;

[0025] Figure 6 It is a schematic diagram of the three-dimensional structure of a pressure device of a total phosphorus and total nitrogen measuring instrument in an embodiment of the utility model;

[0026] In the figure: 1, frame; 2, pressure device; 3, flip cover mechanism; 4, locking mechanism; 5, liquid taking mechanism; 6, moving mechanism; 101, placement area; 102, tray; 103, protection plate; 104, fixed gripper; 201, pressure tank; 202, cover body; 203, first locking part; 204, second locking part; 205, pressure sensor; 206, temperature sensor; 207, exhaust valve; 208, electric heating tube; 209, water level sensor; 210, water inlet pipe; 211, water inlet valve; 212, locking rack; 301, rotating frame; 302, flip cover motor; 401, locking motor; 402, locking gear; 501, liquid collection needle; 502, injection pump; 503, multi-way rotary valve; 504, cleaning tank; 505, drain outlet; 601, rotary gripper; 602, X-axis moving mechanism; 603, X-axis moving guide rail; 604, X-axis driving device; 605, Y-axis moving mechanism; 606, Y-axis moving guide rail; 607, Y-axis driving device; 608, Z-axis moving mechanism; 609, Z-axis guide block; 610, first Z-axis driving device; 611, second Z-axis driving device. DETAILED DESCRIPTION

[0027] In order to make the purpose, features and advantages of the utility model more obvious and easy to understand, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0028] See also Figures 1 to 6 The present invention provides a total phosphorus and total nitrogen measuring instrument, which is characterized by comprising:

[0029] The rack 1 is provided with a placement area 101, wherein the placement area 101 is used to place water sample bottles and reagent bottles, and the water sample bottles are provided with bottle caps;

[0030] The pressure device 2 comprises a pressure tank 201, a cover body 202, a flip mechanism 3 and a locking mechanism 4. The pressure tank 201 is arranged on the frame 1, and the flip mechanism 3 is arranged on the frame 1. The flip mechanism 3 comprises a rotating frame 301 and a flip motor 302. The cover body 202 is rotatably arranged on the rotating frame 301. The flip motor 302 is transmission-connected with the rotating frame 301. The flip standby can drive the cover body 202 to flip to a first position and a second position; the locking mechanism 4 is arranged on the rotating frame 301. The locking mechanism 4 comprises a locking motor 401. The locking motor 401 is transmission-connected with the cover body 202. The locking motor 401 can drive the cover body 202 to rotate to a second position and a third position. When the cover body 202 is in the third position, the cover body 202 and the pressure tank 201 are sealed and connected.

[0031] The liquid collection mechanism 5 at least comprises a liquid collection needle 501 and a syringe pump 502, wherein the liquid collection needle 501 is connected to the syringe pump 502, and the syringe pump 502 is arranged on the frame 1, and the position of the liquid collection needle 501 corresponds to the position of the placement area 101;

[0032] The moving mechanism 6 is arranged on the frame 1 , and the liquid collection needle 501 is arranged on the moving mechanism 6 . The moving mechanism 6 is used to drive the liquid collection needle 501 to move. The moving mechanism 6 is also provided with a rotating gripper 601 .

[0033] The present utility model embodiment provides a total phosphorus and total nitrogen determination instrument, comprising: a frame 1, a pressure device 2, a liquid collection mechanism 5 and a moving mechanism. When in use, firstly place a covered water sample bottle containing a water sample and a reagent bottle containing relevant reagents in the placement area 101, the moving mechanism 6 drives the rotating gripper 601 to grab the covered water sample bottle to the position of the fixed gripper 104, the fixed gripper 104 clamps the water sample bottle, the rotating gripper 601 unscrews the bottle cap, after unscrewing, the rotating gripper 601 with the cover is removed, the liquid collection needle 501 on the moving mechanism 6 moves to the reagent bottle, absorbs the reagent and drips it into the water sample bottle, the rotating gripper 601 transfers the bottle cap to the top of the water sample bottle again, the rotating gripper 601 grabs the bottle cap and covers the water sample bottle tightly, and then Then, the water sample bottle is grabbed and put into the pressure tank 201. After all the water samples are put into the pressure tank 201, the flip motor 302 drives the rotating frame 301 to rotate, thereby driving the cover body 202 to flip from the first position to the second position, and then the locking motor 401 drives the cover body 202 to rotate from the second position to the third position, completing the connection between the cover body 202 and the pressure tank 201, and a sealing ring is provided at the opening of the cover body 202, and the sealing ring is used to seal the joint between the cover body 202 and the pressure tank 201; when opening the cover, the locking motor 401 drives the cover body 202 to rotate from the third position to the second position, and then the flip motor drives the cover body 202 to flip from the second position to the first position. The moving mechanism 6 drives the rotating gripper 601 to grab the water sample bottle in the pressure tank 201 and place it in the placement area 101, and then the rotating gripper 601 opens the bottle cap, and the moving mechanism 6 drives the liquid collection needle 501 to move to the reagent bottle, absorbs the reagent and drips it into the water sample bottle to further process the water sample; after the water sample processing is completed, the moving mechanism 6 drives the liquid collection needle 501 to move to the water sample bottle, extracts the water sample from the water sample bottle, and injects it into an external spectrophotometer or other detection equipment for detection; the total phosphorus and total nitrogen analyzer can automatically process and detect water samples, reduce the labor intensity of operators, and improve detection efficiency.

[0034] In a further implementable embodiment of the present embodiment, the placement area 101 is provided with a tray 102, and the tray 102 is used to place water sample bottles, and the water sample bottles are provided with bottle caps. The position of the rotating gripper 601 corresponds to the position of the bottle cap, and the rotating gripper 601 is used to twist the bottle cap. A number of reagent bottles are also provided on the placement area 101.

[0035] In this embodiment, the water sample bottle is provided with a bottle cap. When the water sample bottle is placed in the pressure device 2, the water sample bottle is in a high temperature and high pressure environment, which can prevent the water sample from evaporating and affecting the detection result. When in use, the moving mechanism 6 drives the rotating gripper 601 to move, and the bottle cap is tightened and loosened by the rotating gripper 601, without manual operation, thereby improving the convenience of operation.

[0036] In a further implementable embodiment of the present invention, the opening of the pressure tank 201 extends outward to form a plurality of first locking portions 203, and the opening of the cover body 202 extends inward to form a plurality of second locking portions 204, and when the cover body 202 is in the third position, the lower portion of the first locking portion abuts against the upper portion of the second locking portion 204.

[0037] In this embodiment, the opening of the pressure tank 201 extends outward to form a plurality of first locking portions 203, and the plurality of first locking portions 203 are evenly distributed along the circumference of the opening of the pressure tank 201. The opening of the cover body 202 extends inward to form a plurality of second locking portions, and the plurality of second locking portions are evenly distributed along the circumference of the opening of the cover body 202. The positions of the second locking portions and the first locking portions 203 correspond to each other. By providing a plurality of the first locking portions 203 and the second locking portions, the connection strength between the cover body 202 and the pressure tank 201 can be effectively strengthened, thereby avoiding safety hazards during use or air leakage of the pressure tank 201.

[0038] In a further implementable embodiment of the present invention, a pressure sensor 205 and a temperature sensor 206 are provided in the pressure tank 201 , and an exhaust valve 207 is also provided at the pressure sensor 205 .

[0039] In this embodiment, a pressure sensor 205 and a temperature sensor 206 are provided in the pressure tank 201 for detecting the pressure and temperature in the pressure tank 201 to ensure the accuracy of the detection result. An exhaust valve 207 is also provided at the pressure sensor 205. When the pressure in the pressure tank 201 is too high, the exhaust valve 207 starts to exhaust and reduce the pressure in the pressure tank 201 to avoid safety hazards. When the sample is processed, the exhaust valve 207 starts to exhaust and reduce the pressure in the pressure tank 201 to facilitate the subsequent opening of the cover 202.

[0040] In a further implementable embodiment of the present embodiment, an electric heating tube 208 is provided inside the pressure tank 201, and the electric heating tube 208 is located at the lower part of the pressure tank 201. A water level sensor 209 is provided inside the pressure tank 201, and the position of the water level sensor 209 corresponds to the position of the electric heating tube 208. A water inlet pipe 210 is also provided on the pressure tank 201, and the water inlet pipe 210 passes through the pressure tank 201 and extends into the interior of the pressure tank 201. A water inlet valve 211 is also provided on the water inlet pipe 210, and the water inlet valve 211 is arranged on the outside of the pressure tank 201.

[0041] In this embodiment, the pressure tank 201 is provided with an electric heating tube 208, and the pressure device 2 heats the pressure tank 201 through the electric heating tube 208, which is convenient for controlling the temperature in the pressure tank 201, and can improve the automation degree of the pressure tank 201 and improve the convenience of operation. The pressure tank 201 is provided with a water level sensor 209, and the pressure tank 201 is also provided with a water inlet pipe 210. The water level sensor 209 is a float switch. Through the cooperation of the water level sensor 209, the water inlet pipe 210 and the water inlet valve 211, it can be ensured that the water level in the pressure tank 201 is higher than the height of the electric heating tube 208, so that the electric heating tube 208 can increase the temperature and air pressure in the pressure tank 201 by heating water, and ensure the accuracy of the detection result.

[0042] In a further implementable embodiment of the present invention, the locking mechanism 4 includes a locking gear 402 , a locking rack 212 is provided on the cover body 202 , the locking gear 402 is meshed with the locking rack 212 , and the locking motor 401 is transmission-connected with the locking gear 402 .

[0043] In this embodiment, the locking mechanism 4 includes a locking gear 402, and a locking rack 212 is provided on the cover body 202. The locking motor 401 drives the locking gear 402 to rotate, and the locking gear 402 is engaged with the locking rack 212 on the cover body 202, thereby driving the cover body 202 to rotate. The gear rack transmission has the advantage of high transmission accuracy. Through the cooperation of the locking gear 402 and the locking rack 212, the accuracy of the locking motor 401 driving the cover body 202 to rotate can be improved, ensuring that the cover body 202 rotates into place, and improving the safety performance of the pressure device 2.

[0044] In a further implementable embodiment of the present invention, a protection plate 103 is provided on the frame 1 , and the position of the protection plate 103 corresponds to the position of the pressure device 2 .

[0045] In this embodiment, a protective plate 103 is provided on the side of the frame 1, and the protective plate 103 is arranged at a position close to the pressure device 2. When the pressure device 2 has a fault such as leakage, the protective plate 103 can play a protective role to prevent the high-temperature and high-pressure gas leaked from the pressure device 2 from causing harm to the operator, thereby improving safety performance.

[0046] In a further implementable embodiment of the present embodiment, the liquid collection mechanism 5 also includes a multi-way rotary valve 503 and a water pump. When the multi-way rotary valve 503 is in a first position, the liquid collection needle 501 is connected to the injection pump 502. When the multi-way rotary valve 503 is in a second position, the liquid collection needle 501 is connected to the water pump. The water pump is used to connect to a water tank.

[0047] In this embodiment, the liquid collection mechanism 5 also includes a multi-way rotary valve 503 and a water pump. When in use, the liquid collection needle 501 is first connected to the water pump, and the water pump draws water and discharges it from the liquid collection needle 501, so as to clean the liquid collection needle 501. Then, the liquid collection needle 501 is connected to the injection pump 502, and the injection pump 502 is connected to the liquid collection needle 501 to absorb a section of air column and airgap. Then, the moving mechanism 6 drives the liquid collection needle 501 to move to a test tube with a reagent to absorb the reagent. After absorbing the reagent, the liquid collection needle 501 is moved to the water sample bottle, and the reagent is injected into the water sample to be tested. The water pump draws water to clean the liquid collection needle 501. By setting the multi-way rotary valve 503 and the water pump in cooperation, the liquid collection needle 501 can be quickly cleaned, thereby improving work efficiency.

[0048] In a further implementable embodiment of the present invention, the liquid collection mechanism 5 further includes a cleaning tank 504 . The position of the cleaning tank 504 corresponds to the position of the liquid collection needle 501 . A drainage port 505 is disposed at the bottom of the cleaning tank 504 .

[0049] In this embodiment, when cleaning the liquid collection needle 501, the moving mechanism 6 drives the liquid collection needle 501 to be inserted into the cleaning tank 504, and the water pump draws water and discharges it from the liquid collection needle 501 into the cleaning tank 504, so that the inside and outside of the liquid collection needle 501 can be cleaned, and the residue on the liquid collection needle 501 can be prevented from affecting the detection result. The bottom of the cleaning tank 504 is provided with a drain port 505, and the water after cleaning the sampling needle can be discharged through the drain port 505, thereby improving the convenience of operation.

[0050] In a further embodiment of the present embodiment, the moving mechanism 6 includes an X-axis moving mechanism 602, a Y-axis moving mechanism 605 and a Z-axis moving mechanism 608, wherein the X-axis moving mechanism 602 includes an X-axis moving guide rail 603 and an X-axis driving device 604, wherein the Y-axis moving mechanism 605 is installed on the X-axis moving guide rail 603, wherein the X-axis driving device 604 drives the Y-axis moving mechanism 605 to slide on the X-axis moving guide rail 603, wherein the Y-axis moving mechanism 605 includes a Y-axis moving guide rail 606 and a Y-axis driving device 607, wherein the Z-axis moving mechanism 608 includes a Z-axis guide block 609, a first Z-axis driving device The Z-axis guide block 609 and the Z-axis guide block 609 are installed on the Y-axis movable guide rail 606, the Y-axis drive device 607 drives the Z-axis movable mechanism 608 to slide on the Y-axis movable guide rail 606, the liquid collection needle 501 is installed on the Z-axis guide block 609, the first Z-axis drive device 610 drives the liquid collection needle 501 to slide on the Z-axis guide block 609, the rotating gripper 601 is installed on the Z-axis guide block 609, and the second Z-axis drive device 611 drives the rotating gripper 601 to slide on the Z-axis guide block 609.

[0051] In this embodiment, an X-axis moving mechanism 602, a Y-axis moving mechanism 605 and a Z-axis moving mechanism 608 are provided to drive the sampling needle and the rotating gripper 601 to move. The structure is simple and reliable, and is convenient for automatic control. The X-axis moving mechanism 602 and the Y-axis moving mechanism 605 are used to move the sampling needle above the placement area 101 or above the pressure device 2 or the cleaning tank 504, and the Z-axis moving mechanism 608 is used to drive the sampling needle and the rotating gripper 601 to move up and down. The X-axis driving device 604 is an electric actuator, and the X-axis driving device 604 is used to drive the Y-axis moving mechanism 605 to slide on the X-axis moving guide rail 603. The Y-axis driving device 607 is a driving motor, and the Y-axis driving device 607 is connected to the Z-axis guide block 609 through a synchronous belt. The Y-axis driving device 607 drives the Z-axis moving mechanism 608 to slide on the Y-axis moving guide rail 606. The first Z-axis driving device 610 is connected to the sampling needle through a belt drive, and the second Z-axis driving device 611 is connected to the rotating gripper 601 through a belt drive.

[0052] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.

[0053] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0054] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A total phosphorus and total nitrogen measuring instrument, characterized in that: include: The rack is provided with a placement area, the placement area is used to place water sample bottles and reagent bottles, and the water sample bottles are provided with bottle caps; The pressure device comprises a pressure tank, a cover body, a flip mechanism and a locking mechanism, wherein the pressure tank is arranged on the frame, the flip mechanism is arranged on the frame, the flip mechanism comprises a rotating frame and a flip motor, the cover body is rotatably arranged on the rotating frame, the flip motor is transmission-connected with the rotating frame, and the flip mechanism can drive the cover body to flip to a first position and a second position; the locking mechanism is arranged on the rotating frame, the locking mechanism comprises a locking motor, the locking motor is transmission-connected with the cover body, and the locking motor can drive the cover body to rotate to a second position and a third position, and when the cover body is in the third position, the cover body and the pressure tank are sealed and connected; The liquid collection mechanism at least comprises a liquid collection needle and a syringe pump, wherein the liquid collection needle is connected to the syringe pump, the syringe pump is arranged on the frame, and the position of the liquid collection needle corresponds to the position of the placement area; A moving mechanism, wherein the moving mechanism is arranged on the frame, the liquid collection needle is arranged on the moving mechanism, the moving mechanism is used to drive the liquid collection needle to move, a rotating gripper is also arranged on the moving mechanism, and a fixed gripper is also arranged on the frame, and the position of the fixed gripper corresponds to the position of the rotating gripper.

2. The total phosphorus and total nitrogen measuring instrument according to claim 1, characterized in that: The placement area is provided with a tray, the tray is used to place water sample bottles, the water sample bottles are provided with bottle caps, the position of the rotating gripper corresponds to the position of the bottle cap, the rotating gripper is used to twist the bottle cap, and a plurality of reagent bottles are also provided on the placement area.

3. The total phosphorus and total nitrogen measuring instrument according to claim 1, characterized in that: The opening of the pressure tank extends outward to form a plurality of first locking portions, and the opening of the cover body extends inward to form a plurality of second locking portions. When the cover body is in the third position, the lower portion of the first locking portion abuts against the upper portion of the second locking portion.

4. The total phosphorus and total nitrogen measuring instrument according to claim 1, characterized in that: A pressure sensor and a temperature sensor are arranged in the pressure tank, and an exhaust valve is also arranged at the pressure sensor.

5. The total phosphorus and total nitrogen measuring instrument according to claim 4, characterized in that: An electric heating tube is provided inside the pressure tank, and the electric heating tube is located at the lower part of the pressure tank. A water level sensor is provided inside the pressure tank, and the position of the water level sensor corresponds to the position of the electric heating tube. A water inlet pipe is also provided on the pressure tank, and the water inlet pipe passes through the pressure tank and extends into the interior of the pressure tank. A water inlet valve is also provided on the water inlet pipe, and the water inlet valve is arranged outside the pressure tank.

6. The total phosphorus and total nitrogen measuring instrument according to claim 1, characterized in that: The locking mechanism comprises a locking gear, a locking rack is arranged on the cover body, the locking gear is meshed with the locking rack, and the locking motor is transmission-connected with the locking gear.

7. The total phosphorus and total nitrogen measuring instrument according to claim 1, characterized in that: The frame is provided with a protection plate, and the position of the protection plate corresponds to the position of the pressure device.

8. The total phosphorus and total nitrogen measuring instrument according to claim 1, characterized in that: The liquid collection mechanism also includes a multi-way rotary valve and a water pump. When the multi-way rotary valve is in a first position, the liquid collection needle is connected to the injection pump. When the multi-way rotary valve is in a second position, the liquid collection needle is connected to the water pump. The water pump is used to connect to a water tank.

9. The total phosphorus and total nitrogen measuring instrument according to claim 8, characterized in that: The liquid collection mechanism further comprises a cleaning tank, the position of which corresponds to the position of the liquid collection needle, and a drainage port is arranged at the bottom of the cleaning tank.

10. The total phosphorus and total nitrogen measuring instrument according to claim 1, characterized in that: The moving mechanism includes an X-axis moving mechanism, a Y-axis moving mechanism and a Z-axis moving mechanism, the X-axis moving mechanism includes an X-axis moving guide rail and an X-axis driving device, the Y-axis moving mechanism is installed on the X-axis moving guide rail, and the X-axis driving device drives the Y-axis moving mechanism to slide on the X-axis moving guide rail, the Y-axis moving mechanism includes a Y-axis moving guide rail and a Y-axis driving device, the Z-axis moving mechanism includes a Z-axis guide block, a first Z-axis driving device and a second Z-axis driving device, the Z-axis guide block and the Z-axis guide block are installed on the Y-axis moving guide rail, the Y-axis driving device drives the Z-axis moving mechanism to slide on the Y-axis moving guide rail, the liquid collection needle is installed on the Z-axis guide block, the first Z-axis driving device drives the liquid collection needle to slide on the Z-axis guide block, the rotating gripper is installed on the Z-axis guide block, and the second Z-axis driving device drives the rotating gripper to slide on the Z-axis guide block.

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