Plunger reactor for fluoride automatic analyzer

Abstract

The present invention discloses a plunger-type reactor for an automatic fluoride analyzer, comprising a standard liquid system, a reaction system, a measurement system, and a controller arranged on a measurement instrument frame. The frame is further provided with a reaction mobile system for controlling the horizontal movement of the reaction system. A water tank system for providing a circulating medium for the reaction system and recovering reaction waste liquid is provided between the reaction system and the reaction mobile system. The reaction system discharges waste liquid into the water tank system using a plunger-type side discharge method. The output end of the controller is respectively connected to the standard liquid system, the reaction system, the measurement system, the reaction mobile system, and the controlled end of the water tank system. The present invention adopts a plunger-type side discharge structure and is combined with a water tank system, which not only avoids the problem of filter membrane fragments being stuck at the discharge point, but also provides a constant temperature and oscillation frequency for the extraction and reaction of fluoride, further providing a reliable guarantee for the accuracy of fluoride determination.

Description

Technical Field

[0001] The invention relates to the technical field of fluoride detection equipment, in particular to a reactor used for an automatic fluoride analyzer. Background Art

[0002] There are two types of fluoride in the ambient air: gaseous fluoride and dusty fluoride. Gaseous fluoride is mainly hydrogen fluoride, and fluorine-containing dust is mainly cryolite, fluorite, aluminum fluoride and phosphate lime. Pollution mainly comes from gases and dust emitted or released from electrolytic aluminum plants, phosphate fertilizer plants and cryolite plants. The concentration of hydrogen fluoride in humans is 400-430 mg / m 3 Low concentrations can cause acute poisoning and lead to death. Long-term inhalation of low concentrations of fluorine and its compound gases and dust can affect the normal physiological functions of various tissues and organs, and even cause chronic fluorosis and skeletal fluorosis. Therefore, it is very important to accurately measure fluorine pollution in the ambient air.

[0003] The applicant has been developing an automatic fluoride analyzer since 2018 to measure the concentration of collected fluoride, and has successively submitted a number of patent applications for the automatic fluoride analyzer around 2020. One of the prior applications is CN202022961067.5, which discloses a reaction device for an automatic fluoride analyzer, including a chassis, a controller, and a liquid distribution system. A liquid collection capsule connected to the liquid distribution system is provided inside the chassis, and a reaction system and a measurement system connected to the liquid collection capsule are also provided above the chassis. The controlled ends of the liquid distribution system and the reaction system are respectively connected to the output end of the controller, and the measurement system is connected to the liquid distribution system. The controller is interactively connected; the reaction system includes a reaction tank and an ultrasonic stirring mechanism, and the controlled end of the ultrasonic stirring mechanism is connected to the output end of the controller; in the reaction device, an ultrasonic oscillator is directly installed on the wall of the reaction tank, and the ultrasonic oscillator transmits the generated ultrasonic wave into the reaction tank to oscillate the solution in the reaction tank; the electromagnetic stirrer stirs the solution in the reaction tank, thereby ensuring that the solution in the reaction tank can fully extract the fluoride on the filter membrane after sampling; the thermostat can ensure that the temperature in the reaction tank does not change during the reaction process, which is more conducive to the extraction of fluoride.

[0004] However, the reaction device has the following problems during use: 1) The ultrasonic oscillator is used to oscillate the solution in the reaction tank, but since the fluoride extraction on the filter membrane has special requirements for the oscillation frequency and reaction temperature, its oscillation frequency is required to be between 40 and 60 kHz, and the power of the ultrasonic oscillator within this oscillation frequency is all above 30W. However, since there is less solution in the reaction tank, the solution in the reaction tank is prone to boiling during the operation of the ultrasonic oscillator, resulting in an excessively high reaction temperature and an inability to ensure the detection environment; if the power is reduced, the vibration frequency will not meet the requirements. phenomenon; therefore, it is difficult to make the solution meet the dual requirements of temperature and vibration frequency required for fluoride extraction and reaction by using an ultrasonic oscillator directly in the reaction tank; 2) the liquid storage capsule and the reaction tank of the reaction device are connected in an up-and-down manner, and are connected and closed by a valve in the middle. Since there are a large number of filter membrane fragments in the reaction tank, the filter membrane fragments are easily stuck between the valve and the inner wall of the reaction tank during the process of connecting and closing the valve, which will cause leakage when used next time; and a large amount of fragments accumulate in the liquid storage capsule for a long time, making it impossible for the valve to open and close normally, affecting the detection accuracy of fluoride. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a plunger-type reactor for an automatic fluoride analyzer to avoid the problem of filter membrane fragments getting stuck at the discharge point, provide a constant temperature and oscillation frequency for the reaction and extraction of fluoride, and further provide a reliable guarantee for the accuracy of fluoride determination.

[0006] In order to solve the above technical problems, the technical solutions adopted by the present invention are as follows.

[0007] A plunger-type reactor for an automatic fluoride analyzer comprises a standard solution system, a reaction system, a measurement system and a controller arranged on a analyzer frame. The frame is further provided with a reaction movement system for controlling the horizontal movement of the reaction system. A water tank system for providing a circulating medium for the reaction system and recovering reaction waste liquid is provided between the reaction system and the reaction movement system. The reaction system discharges waste liquid into the water tank system using a plunger-type side-discharge method. The output end of the controller is respectively connected to the controlled ends of the standard solution system, the reaction system, the measurement system, the reaction movement system and the water tank system.

[0008] The plunger reactor for the above-mentioned fluoride automatic measuring instrument, the reaction moving system includes a horizontal mounting frame fixedly mounted laterally on the frame, a horizontal drive motor fixedly arranged on one side of the horizontal mounting frame, the output end shaft of the horizontal drive motor is connected to a screw rod lying horizontally in the horizontal mounting frame and located below the reaction system, and a moving block equipped with a screw rod thread is also slidably arranged in the horizontal mounting frame; the water tank system is fixedly arranged on the moving block.

[0009] The plunger-type reactor used in the above-mentioned fluoride automatic measuring instrument has a water tank system comprising a water tank fixedly mounted on a movable block, with the top of the water tank being open; a circulating water pump connected to the inner cavity of the water tank and used to transport the circulating medium to the reaction system is fixedly mounted on the outer wall on one side of the water tank, and a drainage pump is mounted on the outer wall on the other side of the water tank.

[0010] The plunger-type reactor used in the automatic fluoride analyzer has a stainless steel filter screen mounted on the top of the water tank.

[0011] The above-mentioned plunger-type reactor for the automatic fluoride analyzer is further fixedly provided with a vertical mounting frame on the movable block, the back of the vertical mounting frame is fixedly connected to the water tank, and a reactor connected to the water tank and used to receive the circulating medium transported by the water tank is fixedly provided on the top surface of the vertical mounting frame. The reactor is a rectangular structure with a cavity inside, and an ultrasonic vibrator is installed on the outer wall of the reactor to provide a vibration frequency for the circulating medium in the reactor; a first reaction cup and a second reaction cup are arranged horizontally and side by side in the reactor, which are vertical and not connected to the reactor cavity, and the lower side walls of the first reaction cup and the second reaction cup extending from the bottom of the reactor are respectively provided with waste liquid pipes facing the stainless steel filter screen at the top of the adjacent water tank; the vertical mounting frame is provided with a plunger-type switch mechanism that extends vertically upward and extends from the top into the lower part of the first reaction cup and the second reaction cup to control the opening and closing of the waste liquid pipe.

[0012] The plunger-type reactor used in the automatic fluoride analyzer has a liquid inlet pipe for inputting circulating medium into the inner cavity at the bottom of the reactor, and an overflow pipe for overflowing the circulating medium at the top of the reactor. The overflow pipe is a curved pipe with its outlet facing the top of the water tank.

[0013] The above-mentioned plunger-type reactor for the automatic fluoride analyzer has a switching mechanism comprising a lifting motor fixedly arranged in a vertical mounting frame, the output shaft of the lifting motor being connected to a cup plug body inserted in a reaction cup, the top of the cup plug body being equipped with a cup plug cover, and sealing rings being embedded on the circumferential walls of the cup plug body and the cup plug cover respectively; when the reaction cup is undergoing a reaction operation, the cup plug body moves upward to close the waste liquid pipe; when the reaction operation is completed, the cup plug body and the cup plug cover move downward to connect the inner cavity of the reaction cup with the waste liquid pipe.

[0014] The above-mentioned plunger reactor for the automatic fluoride analyzer has a stirring motor installed in the cup plug body, and the output shaft of the stirring motor passes through the top of the cup plug body and is connected to the stirring impeller located in the inner cavity of the reaction cup through a coupling; the rotating shaft of the stirring impeller and the cup plug cover are assembled through a sealed bearing.

[0015] The plunger-type reactor used in the above-mentioned fluoride automatic measuring instrument has two photoelectric sensors for detecting the position of the moving block provided on the side wall of the horizontal mounting frame. The positions of the two photoelectric sensors correspond to the first reaction cup and the second reaction cup respectively.

[0016] The plunger reactor used in the above-mentioned fluoride automatic measuring instrument has a measuring system comprising a lifting module fixedly mounted on the measuring instrument frame, the actuating end of the lifting module being connected to an electrode, and an electrode protection cup arranged in parallel with the reactor being fixedly mounted on the vertical mounting frame.

[0017] Due to the adoption of the above technical solution, the technical progress achieved by the present invention is as follows.

[0018] The present invention adopts a plunger-type side drainage structure to avoid the problem of filter membrane fragments being stuck at the drainage point, and the water tank is open at the top, which facilitates the collection and cleaning of filter membrane fragments in the waste liquid. The present invention provides a circulating medium and a reactor, and simultaneously places a reaction cup in the circulating medium of the reactor. When an ultrasonic vibrator is used to provide a vibration frequency, the circulating medium is used to cool the solution in the reaction cup, thereby achieving the purpose of providing a constant temperature and a constant vibration frequency for the solution in the reactor, effectively preventing the high-power ultrasonic vibrator from directly acting on the reaction cup and causing the solution in the cup to boil, and further providing a reliable guarantee for the accuracy of fluoride determination. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present invention;

[0020] Figure 2 It is a schematic diagram of the internal structure of the present invention.

[0021] in:

[0022] 1. Standard liquid system, 11. Standard liquid cup, 12. Inverted U-shaped bracket,

[0023] 2. Reaction movement system, 21. Horizontal mounting frame, 22. Horizontal drive motor, 23. Screw, 24. Moving block, 25. Vertical mounting frame, 26. Photoelectric sensor;

[0024] 3. Reaction system, 31. Reactor, 311. Liquid inlet pipe, 312. Overflow pipe, 32. Liquid injection head, 33. First reaction cup, 34. Second reaction cup, 35. Waste liquid pipe, 36. Switch mechanism, 361. Lifting motor, 362. Cup plug body, 363. Cup plug cover, 364. Sealing ring, 37. Stirring motor, 38. Stirring impeller, 39. Ultrasonic array;

[0025] 4. Measurement system, 41. Lifting module, 42. Electrode, 43. Sensor, 44. Electrode protection cup;

[0026] 5. Water tank, 51. Water inlet, 52. Stainless steel filter, 53. Circulating water pump, 54. Drain pump, 55. Liquid level sensor. DETAILED DESCRIPTION

[0027] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] A plunger type reactor for a fluoride automatic measuring instrument, the structure of which is as follows Figure 1 and Figure 2 As shown, it includes a standard solution system 1, a reaction movement system 2, a reaction system 3, a measurement system 4, a water tank system and a controller arranged on the measuring instrument frame. The output end of the controller is connected to the controlled end of each of the above systems respectively to control the coordinated operation of each system to complete the extraction and reaction of fluoride.

[0029] In the present invention, the reaction moving system 2 is used to control the horizontal movement of the reaction system 3 so that the two reaction cups in the reaction system can sequentially complete the reagent filling, filter membrane fragment reception and electrode detection.

[0030] The reaction movement system 2 includes a horizontal mounting frame 21, a horizontal drive motor 22, a screw rod 23, a moving block 24, and a vertical mounting frame 25. The horizontal mounting frame 21 is fixedly mounted horizontally on the frame, and the horizontal drive motor 22 is fixedly set on one side of the horizontal mounting frame. The controlled end of the horizontal drive motor 22 is connected to the output end of the controller; the screw rod 23 lies horizontally in the horizontal mounting frame and is located below the reaction system. One end of the screw rod 23 is connected to the output shaft of the horizontal drive motor, and the other end of the screw rod 23 is connected to the horizontal mounting frame 21 through a bearing; the moving block 24 is slidably set in the horizontal mounting frame 21 and is threadedly assembled with the screw rod. Under the action of the horizontal drive motor, it moves left and right on the screw rod, as shown in FIG. Figure 2 shown.

[0031] The water tank system and the vertical mounting frame 25 are both fixedly mounted on the moving block 24, and the back of the vertical mounting frame 25 is fixedly connected to the water tank 5. Figure 2 shown.

[0032] The water tank system is used to provide circulating medium for the reaction system and to recycle reaction waste liquid; the reaction system uses a plunger-type side discharge method to discharge waste liquid into the water tank system.

[0033] In the present invention, the water tank system includes a water tank 5 fixedly mounted on the moving block 24, the top of the water tank is open, and a stainless steel filter 52 is mounted on the top of the water tank to filter the filter membrane fragments in the waste liquid discharged from the reaction system for timely cleaning; the side without the stainless steel filter is the water inlet 51 of the water tank, which is convenient for adding circulating medium to the water tank, such as Figure 1 In this embodiment, the circulating medium is water.

[0034] A circulating water pump 53 is fixedly installed on one side of the outer wall of the water tank. The liquid inlet of the circulating water pump 53 is connected to the inner cavity of the water tank through a pipeline, and the liquid outlet of the circulating water pump 53 is connected to the reaction system through a pipeline. The controlled end of the circulating water pump 53 is connected to the output end of the controller, and is used to transport the circulating medium to the reaction system under the command of the controller. The setting of the circulating medium can ensure the reaction temperature and vibration frequency required by the reaction system. In this embodiment, a liquid level sensor 55 is also installed on the side wall of the water tank. Figure 1 As shown, it is used to detect the liquid level of the circulating medium in the water tank.

[0035] The top of the water tank, equipped with a stainless steel filter, is aligned with the liquid outlet of the reaction system, vertically and horizontally. This filter collects waste liquid discharged after the reaction and circulating medium overflowing from the reaction system. A drainage pump 54 is located at the bottom of the other side of the water tank's outer wall. This pump communicates with the tank's interior, and its controlled terminal is connected to the output of a controller. This pump, under the controller's command, discharges waste liquid from the tank, maintaining a constant level of circulating medium within the tank.

[0036] The reaction system includes a reactor 31 , a liquid injection head 32 , a plunger-type switch mechanism 36 , an ultrasonic vibrator 39 , and a stirring mechanism.

[0037] The reactor 31 is fixedly mounted on the top surface of the vertical mounting frame 25 and is a rectangular parallelepiped structure with a hollow interior. The reactor cavity 31 is connected to the water tank for receiving the circulating medium transported by the water tank.

[0038] The bottom of the reactor 31 is provided with a liquid inlet pipe 311 for inputting the circulating medium into the inner cavity, and the liquid inlet pipe 311 is connected to the pipeline connected to the liquid outlet of the circulating water pump 53; the top of the reactor 31 is provided with an overflow pipe 312 for the overflow of the circulating medium, and the overflow pipe 312 is a curved pipe with its outlet facing the top of the water tank, such as Figure 1 shown.

[0039] The reactor 31 is provided with a first reaction cup 33 and a second reaction cup 34 arranged vertically side by side. Figure 1 As shown; the first reaction cup 33 and the second reaction cup 34 are not connected to the inner cavity of the reactor, that is, the circulating medium in the reactor and the reaction solution in the inner cavity of the reaction cup will not be mixed during the reaction process; in the present invention, the top ends of the first reaction cup 33 and the second reaction cup 34 extend upward from the reactor 31, which is convenient for connecting the injection head and the electrodes of the measurement system; the bottom ends of the first reaction cup 33 and the second reaction cup 34 extend downward from the reactor 31.

[0040] Waste liquid pipes 35 are respectively provided on the lower side walls of the first reaction cup 33 and the second reaction cup 34 extending from the bottom of the reactor. The waste liquid pipes are arranged downwardly with the liquid outlets facing the stainless steel filter screen of the water tank on the side.

[0041] The plunger switch mechanism 36 is vertically upwardly arranged on the vertical mounting frame, and the top of the plunger switch mechanism 36 extends into the lower part of the first reaction cup 33 and the second reaction cup 34 to control the opening and closing of the waste liquid pipe.

[0042] In the present invention, the structure of the switch mechanism 36 is as follows Figure 2 As shown, it includes a lifting motor 361 fixedly arranged in the vertical mounting frame 25, and the controlled end of the lifting motor is connected to the output end of the controller; the output shaft of the lifting motor 361 is connected to the cup plug body 362 inserted in the reaction cup, and the top of the cup plug body 362 is equipped with a cup plug cover 363, and the circumferential walls of the cup plug body 362 and the cup plug cover 363 are respectively embedded with sealing rings 364 to prevent the reaction solution in the inner cavity of the reaction cup from leaking.

[0043] When the reaction cup is performing a reaction operation, under the instruction of the controller, the lifting motor controls the cup plug body 362 and the cup plug cover 363 to move upward to close the waste liquid pipe 35; when the reaction operation is completed, under the instruction of the controller, the lifting motor controls the cup plug body 362 and the cup plug cover 363 to move downward to connect the inner cavity of the reaction cup with the waste liquid pipe, and the reaction solution and filter membrane fragments in the reaction cup can flow to the water tank through the waste liquid pipe.

[0044] In the present invention, the stirring mechanism is arranged on the switch mechanism, and is used to stir the reaction solution in the reaction cup during the reaction process. Figure 2 As shown, it includes a stirring motor 37 and a stirring impeller 38. The stirring motor 37 is fixedly arranged in the cup plug body 362, and the controlled end of the stirring motor is connected to the output end of the controller; the stirring impeller 38 is located in the inner cavity of the reaction cup, and the rotating shaft of the stirring impeller is assembled with the cup plug cover 363 through a sealed bearing. The output shaft of the stirring motor passes through the top of the cup plug body 362 and is connected to the rotating shaft of the stirring impeller 38 through a coupling.

[0045] An ultrasonic vibrator 39 is mounted on the outer wall of the reactor and provides a vibration frequency. When operating, it transmits ultrasonic waves into the circulating medium, which are then transferred to the solution in the reaction cup, providing the vibration frequency required for fluoride extraction. During this process, the heat generated by the ultrasonic waves heats the circulating medium. Based on the detected circulating medium temperature, the controller activates the circulating water pump to accelerate the flow of the circulating medium, cooling the circulating medium in the reactor and further lowering the temperature of the solution in the reaction cup, thereby reliably maintaining the required reaction temperature.

[0046] The injection head 32 is fixedly mounted on the frame of the measuring instrument, and is used to inject reagents required for the reaction into the first reaction cup and the second reaction cup respectively under the instruction of the controller when the reactor moves left and right.

[0047] In order to accurately control the moving position of the reactor and facilitate the positioning of the first reaction cup and the second reaction cup, in this embodiment, a photoelectric sensor 26 is provided on the side wall of the horizontal mounting frame 21. The positions of the two photoelectric sensors correspond to the first reaction cup and the second reaction cup, respectively. The output ends of the photoelectric sensors are connected to the input ends of the controller; the controller monitors the position of the moving block through the photoelectric sensors and determines the positions of the first reaction cup and the second reaction cup.

[0048] The structure of the standard solution system 1 is as follows Figure 1 and Figure 2 As shown, it includes an inverted U-shaped bracket 12 fixedly arranged on the frame, and a standard liquid cup 11 containing a standard solution is fixedly arranged on the top of the inverted U-shaped bracket 12. The inverted U-shaped bracket 12 also facilitates the left and right movement of the water tank system to provide walking space for the drainage pump.

[0049] The structure of the measuring system 4 is as follows Figure 1 and Figure 2 As shown, it includes a lifting module 41 fixedly mounted on the measuring instrument frame. The controlled end of the lifting module is connected to the output end of the controller, and the active end of the lifting module is connected to the electrode 42. An electrode protection cup 44 is also fixedly mounted on the vertical mounting frame 25. The electrode protection cup 44 is arranged in parallel with the reactor 31 and is used to place the electrode when fluoride detection is not being performed, thereby protecting the electrode. In this embodiment, a sensor 43 is also provided at the bottom end of the lifting module 41. The output end of the sensor is connected to the input end of the controller. The sensor is used to sense whether the electrode protection cup is exactly below the electrode, so that the lifting module can accurately lower the electrode into the electrode protection cup.

[0050] When the present invention is used to determine fluoride in filter membrane fragments, its specific working process is as follows.

[0051] S1. Prepare standard solution and draw a standard curve.

[0052] The prepared standard solution is stored in the standard solution cup for future use; in the early stage of the test, the controller controls the injection head to add the standard solution into the reaction cup, and the voltage values of different fluoride concentrations are measured by the electrode to draw a standard curve.

[0053] Then clean the reaction cup and use it for detection.

[0054] S2. Fluoride Extraction. The fluoride-adsorbed filter membrane is sheared by the shearing device and falls into the first and second reaction cups of the reactor. The controller controls the lifting motor in the switch mechanism to move the cup stopper upward to seal the waste liquid pipe, forming a reaction space within the reaction cup. The controller then controls the horizontal drive motor to sequentially move the first and second reaction cups to the bottom of the injection head. The controller then activates the injection head 32 to inject the relevant reagents into the first and second reaction cups respectively.

[0055] The controller starts the circulating water pump 53 to pump the circulating medium in the water tank into the reactor 31; then, the controller controls the ultrasonic vibrator 39 to work and provide a vibration frequency; at the same time, the stirring motor 37 is started to work to stir the reaction solution and filter membrane fragments in the reaction cup to ensure that the solution in the reaction cup can fully extract the fluoride on the sampling filter membrane.

[0056] S3. Fluoride determination. The controller first controls the lifting module to raise the electrode. It then controls the horizontal motor to move the reactor, positioning the first reaction cup below the electrode. The lifting module then controls the electrode to move downward into the first reaction cup, where it measures the solution. After the measurement is complete, the electrode feeds the results back to the controller, which analyzes them. Fluoride determination is then completed in the second reaction cup.

[0057] S4. After the determination is completed, the controller controls the lifting motor to drive the cup plug body and the cup plug cover downward, opening the waste liquid pipe inlet to connect the reaction cup and the waste liquid pipe. At this time, the reaction solution containing filter membrane fragments will all flow into the water tank through the waste liquid pipe and will not remain between the cup plug body and the inner wall of the reaction cup, preventing leakage when used again.

[0058] After the electrode completes the measurement, it will upload the tested voltage value to the measuring instrument controller, and the controller will calculate the fluoride concentration in the filter membrane according to the standard curve drawn in the first step.

Claims

1. A plunger-type reactor for an automatic fluoride analyzer, comprising a standard solution system (1), a reaction system (3), a measuring system (4), and a controller arranged on a analyzer frame, characterized in that: The rack is also provided with a reaction moving system (2) for controlling the horizontal movement of the reaction system (3); a water tank system for providing a circulating medium for the reaction system and recovering reaction waste liquid is provided between the reaction system and the reaction moving system; the reaction system discharges waste liquid into the water tank system by a plunger-type side discharge method; the output end of the controller is respectively connected to the standard liquid system (1), the reaction system (3), the measurement system (4), the reaction moving system (2) and the controlled end of the water tank system; The reaction movement system (2) includes a horizontal mounting frame (21) fixedly mounted on a frame in a transverse direction, a horizontal drive motor (22) fixedly arranged on one side of the horizontal mounting frame, an output shaft of the horizontal drive motor connected to a screw rod (23) lying horizontally in the horizontal mounting frame and located below the reaction system, and a moving block (24) threadedly mounted on the screw rod is also slidably arranged in the horizontal mounting frame (21); the water tank system is fixedly arranged on the moving block (24); The water tank system comprises a water tank (5) fixedly mounted on a movable block (24), the top of the water tank being open; a circulating water pump (53) in communication with an inner cavity of the water tank and used for conveying a circulating medium to the reaction system is fixedly mounted on an outer wall of one side of the water tank, and a drainage pump (54) is mounted on an outer wall of the other side of the water tank; A stainless steel filter (52) is mounted on the top of the water tank; The moving block (24) is also fixedly provided with a vertical mounting frame (25), the back of the vertical mounting frame (25) is fixedly connected to the water tank (5), and a reactor (31) connected to the water tank and used for receiving the circulating medium transported by the water tank is fixedly provided on the top surface of the vertical mounting frame (25), the reactor (31) being a rectangular parallelepiped structure with a cavity inside, and an ultrasonic vibrator (39) for providing a vibration frequency for the circulating medium in the reactor is installed on the outer wall of the reactor (31); a first reaction cup (33) and a second reaction cup (34) are arranged horizontally and parallel in the reactor (31), which are vertical and not connected to the reactor cavity, and waste liquid pipes (35) are respectively provided on the lower side walls of the first reaction cup (33) and the second reaction cup (34) extending from the bottom of the reactor, and facing the stainless steel filter (52) at the top of the adjacent water tank; a plunger-type switch mechanism (36) is provided on the vertical mounting frame, which is vertically upward and extends into the lower part of the first reaction cup (33) and the second reaction cup (34) for controlling the opening and closing of the waste liquid pipe; The liquid inlet of the circulating water pump (53) is connected to the inner cavity of the water tank through a pipeline, and the liquid outlet of the circulating water pump (53) is connected to the reaction system through a pipeline; A liquid inlet pipe (311) for inputting circulating medium into the inner cavity is provided at the bottom of the reactor (31), and the liquid inlet pipe (311) is connected to a pipe connected to the liquid outlet of the circulating water pump (53). An overflow pipe (312) for overflowing the circulating medium is provided at the top of the reactor (31), and the overflow pipe (312) is a curved pipe with an outlet toward the top of the water tank.

2. The plunger-type reactor for the fluoride automatic measuring instrument according to claim 1, characterized in that: The switch mechanism (36) includes a lifting motor (361) fixedly arranged in the vertical mounting frame (25), the output shaft of the lifting motor (361) is connected to the cup plug body (362) inserted in the reaction cup, the top end of the cup plug body (362) is equipped with a cup plug cover (363), and the circumferential walls of the cup plug body (362) and the cup plug cover (363) are respectively embedded with sealing rings (364); when the reaction cup is performing a reaction operation, the cup plug body (362) moves upward to close the waste liquid pipe (35); when the reaction operation is completed, the cup plug body (362) and the cup plug cover (363) move downward to connect the inner cavity of the reaction cup with the waste liquid pipe.

3. The plunger-type reactor for the fluoride automatic measuring instrument according to claim 2, characterized in that: The cup plug body (362) is equipped with a stirring motor (37), the output shaft of which passes through the top of the cup plug body (362) and is connected to the stirring impeller (38) located in the inner cavity of the reaction cup through a coupling; the rotating shaft of the stirring impeller and the cup plug cover (363) are assembled through a sealed bearing.

4. The plunger-type reactor for the fluoride automatic measuring instrument according to claim 1, characterized in that: Two photoelectric sensors for detecting the position of the moving block (24) are provided on the side wall of the horizontal mounting frame (21), and the positions of the two photoelectric sensors correspond to the first reaction cup and the second reaction cup respectively.

5. The plunger-type reactor for the fluoride automatic measuring instrument according to claim 1, characterized in that: The measuring system (4) includes a lifting module (41) fixedly mounted on a measuring instrument frame, an operating end of the lifting module being connected to an electrode (42), and an electrode protection cup (44) arranged in parallel with the reactor being fixedly mounted on the vertical mounting frame (25).

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