Fluoride automatic analyzer

Abstract

The invention discloses an automatic fluoride determination instrument, including a frame and a controller; the frame is provided with a membrane storage system for storing filter membrane clips, a sampling device for sampling filter membranes, a shearing device for shearing the sampled filter membranes, and a reaction device located below the shearing device for extracting and determining fluoride in the sheared filter membranes in sequence; the frame located on the other side of the membrane storage system is provided with an automatic membrane clip pushing device; the controlled ends of the automatic membrane clip pushing device, the sampling device, the shearing device, and the reaction device are respectively connected to the output end of the controller. The invention integrates the storage of filter membrane clips, the pushing of filter membrane clips, the sampling of filter membranes, the shearing of filter membranes, and the determination of fluoride in filter membranes; the purpose of determining fluoride in the air can be achieved through one device, and the continuous determination of fluoride in ambient air can be achieved without manual supervision.

Description

Technical Field

[0001] The invention relates to the technical field of fluoride detection devices, in particular to an automatic fluoride determination instrument. Background Art

[0002] There are two types of fluoride in the ambient air: gaseous fluorine and dusty fluorine. Gaseous fluorine is mainly hydrogen fluoride, and fluorine-containing dust is mainly cryolite, fluorite, aluminum fluoride and apatite. Pollution mainly comes from gases and dust emitted or dispersed by aluminum electrolytic plants, phosphate fertilizer plants and cryolite plants. 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 fluorine poisoning and skeletal fluorosis. Therefore, it is very important to accurately measure fluoride pollution in ambient air.

[0003] The fluoride detection process mainly includes three stages: sample sampling, separation, and analysis. After fluoride sampling, the filter in the filter holder needs to be taken out, the fluoride on the filter membrane needs to be separated into the solution, and then the fluoride in the solution needs to be analyzed and determined.

[0004] Existing fluoride measuring devices have the following defects:

[0005] 1) The sampling of the filter membrane, the shearing of the filter membrane or one or more separate settings in the fluoride determination cannot complete the entire fluoride determination process through one device. The fluoride determination needs to be carried out step by step through multiple devices, which makes the determination process cumbersome.

[0006] 2) The existing measuring devices need to be manually supervised and operated, and because the devices are separately set up, the detection process is discontinuous, which consumes a lot of manpower and time.

[0007] 3) When taking out and placing the filter membrane, it is necessary to manually place the filter membrane into the sampling device, and only one sample can be collected after each membrane is placed.

[0008] 4) Currently, the sampled filter membrane needs to be cut manually, the cutting size is difficult to control, and it is easy to bring in other pollutants and affect the test accuracy.

[0009] 5) Manual operation of adding liquid is prone to errors. In addition, the liquid temperature cannot be constant when the manual measurement electrode reads the data, resulting in large measurement errors.

[0010] 6) The device as a whole cannot work properly in a high magnetic field environment. Summary of the invention

[0011] The technical problem to be solved by the present invention is to provide an automatic fluoride measuring instrument to solve the problem that the entire fluoride measuring process cannot be completed by one device, so as to achieve the purpose of completing the fluoride measuring in the air by one device, so as to realize high-precision continuous measuring of fluoride in the ambient air without manual supervision and strong magnetic field.

[0012] In order to solve the above technical problems, the technical solutions adopted by the present invention are as follows.

[0013] The fluoride automatic analyzer comprises a frame and a controller for controlling the overall operation of the device; the frame is provided with a membrane storage system for storing filter membrane clips, a sampling device for sampling the filter membrane corresponding to the discharge port of the membrane storage system, a shearing device for shearing the sampled filter membrane corresponding to the discharge port of the sampling device, and a reaction device located below the shearing device for extracting and measuring fluoride in the sheared filter membrane; the frame located on the other side of the membrane storage system is provided with an automatic membrane pushing device for pushing the filter membrane clips in the membrane storage system into the sampling device and the shearing device in sequence and step by step; the controlled ends of the automatic membrane pushing device, the sampling device, the shearing device and the reaction device are respectively connected to the output end of the controller; the frame is also provided with an air suction system for assisting the sampling device in sucking the sampling gas and a liquid storage system for storing the reagents for the reaction device; the liquid storage system is connected to the reaction device through a liquid adding system.

[0014] To further optimize the technical solution, a waste filter membrane clip collection bin for collecting the discarded filter membrane clips after shearing is also provided on the frame located on one side of the shearing device, and the filter membrane clip automatic pushing device can push the discarded filter membrane clips after shearing into the waste filter membrane clip collection bin.

[0015] To further optimize the technical solution, the automatic filter membrane clamp pushing device includes a horizontal support platform positioned on the frame and a movable frame arranged above the horizontal support platform, the membrane storage system is positioned on the movable frame, and a filter membrane clamp discharge gap that runs through the bottom end of the membrane storage system and the top end of the movable frame is formed; a push arm corresponding to the filter membrane clamp discharge gap is arranged in the movable frame through a push arm driving mechanism, and the controlled end of the push arm driving mechanism is connected to the output end of the controller.

[0016] To further optimize the technical solution, a lateral moving mechanism is provided between the horizontal support platform and the movable frame for driving the movable frame, the film storage system and the push arm to move left and right, and a controlled end of the lateral moving mechanism is connected to an output end of the controller.

[0017] To further optimize the technical solution, the sampling equipment includes a sampling box, a movable splint is arranged in the sampling box, a sealing top plate is arranged below the movable splint through a spring connection, detection membrane slots are respectively formed between the movable splint and the top of the inner wall of the sampling box and between the movable splint and the sealing top plate, the sealing top plate is moved up and down by a sealing driving mechanism, and the sealing driving mechanism is arranged in the sampling box; a sampling structure for environmental gas filtration sampling and a blank test structure with the same structure as the sampling structure for performing a blank control test are arranged side by side at the top of the sampling box, and the detection membrane slots include a detection membrane slot a connected to the sampling structure and a detection membrane slot b connected to the blank test structure.

[0018] To further optimize the technical solution, the shearing device includes a shearing chassis, in which a film holding plate is arranged, and a clamp for pressing the filter membrane clamp into the film holding plate, a circular cutting knife located on the inner side of the clamp for shearing the filter membrane clamp in the film holding plate, and a push-out plate located on the inner side of the circular cutting knife are arranged in sequence directly above the film holding plate, the top ends of the clamp, the circular cutting knife and the push-out plate are driven to rise and fall by a driving mechanism, and the controlled end of the driving mechanism is connected to the output end of the controller; a circular leakage hole matched with the circular cutting knife is provided on the film holding plate; a shredder mechanism for crushing the cut filter membrane is provided below the film holding plate, and a discharge port capable of transporting the crushed filter membrane to the reaction device is provided at the bottom of the shredder mechanism, and the controlled end of the shredder mechanism is connected to the output end of the controller.

[0019] To further optimize the technical solution, a paper feeding mechanism for transferring the cut filter membrane to the inside of the paper shredding mechanism is provided directly below the circular leakage hole of the membrane holding plate, and the controlled end of the paper feeding mechanism is connected to the output end of the controller.

[0020] To further optimize the technical solution, the reaction device includes a reaction chassis, on which is provided a reaction system capable of adding liquid through a liquid adding system and extracting fluoride from the filter membrane, and above the reaction chassis is also provided a measuring system capable of being inserted into the reaction system for fluoride measurement, the controlled end of the reaction system is connected to the output end of the controller, and the measuring system is interactively connected to the controller.

[0021] To further optimize the technical solution, the reaction system includes a reaction tank arranged on the top surface of the reaction chassis and a liquid preparation tank capable of transporting the prepared reaction liquid into the reaction tank, bottom ends of the reaction tank and the liquid preparation tank are provided with bottom valves and a bottom valve driving mechanism for driving the bottom valve to lift and lower to realize whether to discharge the liquid, and a liquid collecting bag for containing and discharging residual liquid is provided below the reaction tank and the liquid preparation tank; an ultrasonic separation mechanism for separating fluoride from the solution after the filter membrane is added is provided on the reaction tank, and the controlled end of the ultrasonic separation mechanism is connected to the output end of the controller.

[0022] Further optimizing the technical solution, the ultrasonic separation mechanism includes an ultrasonic oscillator arranged on the outer wall of the reaction tank and an electromagnetic stirrer arranged in the reaction tank, and the controlled ends of the ultrasonic oscillator and the electromagnetic stirrer are respectively connected to the output end of the controller;

[0023] A thermostat is also arranged on the outer wall of the reaction tank, and a controlled end of the thermostat is connected to an output end of the controller.

[0024] Due to the adoption of the above technical scheme, the technical progress achieved by the present invention is as follows.

[0025] The present invention integrates the storage of filter membrane clips, the pushing of filter membrane clips, the sampling of filter membranes, the shearing of filter membranes, and the determination of fluoride in filter membranes. The purpose of determining fluoride in the air can be accomplished by one device, and the continuous determination of fluoride in ambient air can be achieved without manual supervision, which complies with the National Environmental Protection Standard of the People's Republic of China "Determination of Fluoride in Ambient Air by Filter Membrane Sampling / Fluoride Ion Selective Electrode Method" (HJ955-2018).

[0026] The present invention places a filter membrane clamp loaded with a processed filter membrane into a membrane storage system, and an automatic filter membrane clamp pushing device automatically and continuously pushes the filter membrane clamp to a sampling device without manual supervision, and adsorbs a certain amount of fluoride in the air onto the filter membrane through an air suction system, and accurately records the flow rate through a mass flow meter and feeds back to a controller; the controller can control the push arm to push the filter membrane clamp after sampling into a shearing device, and can push the discarded filter membrane clamp into a waste filter membrane clamp bin after shearing is completed; the shearing device loads the shredded filter membrane into a reaction device for processing and analysis, and uploads the results through a program control, calculation and transmission system.

[0027] The automatic membrane clamp pushing device provided in the present invention can realize automatic and continuous pushing of the membrane clamp without manual supervision. The push arm driving mechanism can control the push arm to push the membrane clamp from the membrane storage bin to the sampling device, and can control the push arm to push the membrane clamp after sampling into the shearing device provided at the same workstation. After the shearing is completed, the discarded membrane clamp can be pushed into the waste membrane clamp bin, thereby realizing automatic membrane pushing operation and automatic pushing of the membrane clamp. During the pushing process of the membrane clamp, no manual picking and placing operation is required, thereby reducing the labor intensity and meeting the requirements of efficient, automatic and continuous sampling and shearing.

[0028] When multiple sampling stations are provided in the sampling device, the lateral moving mechanism provided between the horizontal support platform and the movable frame can enable the device to push the filter membrane clamp into different sampling stations and switch the pushing stations, so that the push arm can enter any reaction station, making the device more applicable.

[0029] The sampling device provided in the present invention mainly measures the fluoride in the ambient air by the filter membrane sampling method. The whole process blank and the laboratory blank can effectively eliminate environmental interference and effectively ensure the accuracy of the experimental results. When the temperature of the environment changes, the set constant temperature device can ensure the accurate detection of the experiment. The present invention strictly follows the determination of fluoride in ambient air of HJ955, and is higher than this standard, and can realize automatic continuous sampling and monitoring without manual supervision.

[0030] The movable clamping plate in the sampling device of the present invention can move up and down through the driving of the sealing driving mechanism, thereby opening and closing the detection membrane clamping slot, so as to facilitate the replacement and placement of the filter membrane clamp.

[0031] The shearing device provided in the present invention can realize continuous shearing of the filter membrane without manual supervision. By providing a paper shredding mechanism under the membrane holding plate, the present invention can shred the filter membrane after being cut into circles into uniform, standard fragments. The static electricity removal system provided on the outer wall of the paper discharge funnel can eliminate the static electricity generated by the shredded filter membrane during the transportation process, so that the shredded filter membrane can fall smoothly into the reaction device without manual picking and placing, thus avoiding the influence of human factors. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 The structure of the present invention is schematically shown Figure 1 ;

[0033] Figure 2 The structure of the present invention is schematically shown Figure 2 ;

[0034] Figure 3 The structure of the present invention is schematically shown Figure 3 ;

[0035] Figure 4 A top view of the present invention;

[0036] Figure 5 This is a schematic diagram of the structure of the automatic pushing device for the filter membrane clip of the present invention;

[0037] Figure 6 It is a top view of the automatic pushing device for the filter membrane clip of the present invention;

[0038] Figure 7 It is a side view of the automatic pushing device of the filter membrane clip of the present invention;

[0039] Figure 8 This is a front view of the automatic pushing device for the filter membrane clip of the present invention;

[0040] Fig. 9 It is a structural schematic diagram of the membrane storage system of the present invention;

[0041] Fig.10It is a front view of the membrane storage system of the present invention;

[0042] Fig.11 A top view of the membrane storage system of the present invention;

[0043] Fig.12 is a cross-sectional view of the sampling device of the present invention;

[0044] Fig.13 It is a structural schematic diagram of the sampling device of the present invention;

[0045] Fig.14 A top view of the sampling device of the present invention;

[0046] Fig.15 is a side view of the sampling device of the present invention;

[0047] Fig.16 It is a structural schematic diagram of the shearing device of the present invention;

[0048] Fig.17 is a rear view of the shearing device of the present invention;

[0049] Fig.18 A side view of the shearing device of the present invention

[0050] Fig.19 is a top view of the shearing device of the present invention;

[0051] Fig. 20 is a cutaway view of the shearing device of the present invention;

[0052] Fig.21 A partially cutaway view of a shearing device according to the present invention;

[0053] Fig. 22 It is a structural schematic diagram of the reaction device of the present invention;

[0054] Fig.23 It is a rear view of the reaction device of the present invention;

[0055] Fig.24 A side view of the reaction device of the present invention

[0056] Fig.25 is a top view of the reaction device of the present invention;

[0057] Fig.26 is a cross-sectional view of the reaction device of the present invention;

[0058] Fig. 27 It is an exploded view of the filter membrane clip of the present invention.

[0059] Wherein: 1, rack, 1a, rack top plate, 1b, rack middle plate, 1c, rack bottom plate;

[0060] 2. Film storage system, 21. Film storage bin positioning frame, 211. Top positioning groove a, 22. Film storage bin, 221. First film storage bin, 222. Second film storage bin, 223. Film storage bin positioning frame, 224. Positioning protrusion, 225. Discharging gap of filter membrane clamp, 226. Removable side panel;

[0061] 3. Automatic pushing device for filter membrane clamp, 31. Horizontal support platform, 32. Movable frame, 321. Film storage bin positioning frame, 322. Top slide, 323. Bottom groove, 324. Top positioning groove b, 33. Push arm, 331. First push arm, 332. Second push arm, 34. Push arm driving mechanism, 341. First lead screw, 342. Driving gear, 343. Driven gear, 344. Guide rod, 35. Lateral moving mechanism, 351. Slideway a, 352. Vertical positioning plate, 353. Second lead screw, 354. Moving nut, 355. Driving motor a, 36. Limiting mechanism, 361. Limit switch, 362. Vertical direct contact plate, 37. Position detection mechanism, 371. Position sensor, 372. Position sensor bracket;

[0062] 4. Sampling equipment, 41. Sampling box, 411. Groove, 42. Sampling structure, 421. Sampling air inlet pipe, 43. Blank test structure, 431. Blank test air inlet pipe, 44. Movable clamping plate, 441. Detection membrane slot, 442. Protrusion, 45. Sealing drive mechanism, 452. Moving guide rail, 453. Steering air duct, 4531. First transverse plate, 4532. Second transverse plate, 454. Lead screw a, 455. Nut a, 456. Drive motor b, 457. Guide roller, 458. First spring, 459. Second guide roller, 4510. Second spring, 4511. Nut connecting plate a, 47. Flow meter, 48. Stopper a, 49. Sealing top plate;

[0063] 5. Reaction device, 51. Reaction chassis, 52. Reaction tank, 521. Liquid preparation tank, 522. Reaction tank a, 523. Reaction tank b, 524. Electrode protection tank, 53. Liquid collection capsule, 54. Bottom valve driving mechanism, 541. Support plate, 542. Guide column, 543. Nut connecting plate b, 544. Lead screw b, 545. Nut b, 546. Drive motor, 547. Spring, 548. Sealed cavity, 55. Reaction system, 552. Ultrasonic oscillator, 553. Thermostat, 554. Electromagnetic stirrer, 5541. Electromagnetic stirring motor, 5542. Drive shaft, 5543. Magnetic block, 5544. Rotor, 555. Positioning card plate, 56. Measuring system, 561. Measuring electrode, 563. Blow-drying system, 57. Drainage system, 58. Liquid adding pipe bracket, 581. Liquid adding pipe head, 582. Liquid taking pipe, 59. Bottom valve;

[0064] 6. Shearing device, 61. Shearing machine box, 62. Circular cutting knife, 621. Middle template, 63. Presser, 631. Bottom template, 634. Slideway b, 635. Connecting column, 64. Driving mechanism, 641. Motor, 642. Connecting plate, 643. Screw rod, 65. Film plate, 651. Filter membrane holding tank, 66. Paper feeding mechanism, 661. Paper feeding roller, 662. Paper feeding driving motor, 67. Paper shredding mechanism, 671. Paper shredding knife, 672. Paper shredding driving motor, 68. Paper discharge funnel, 69. Anti-static system, 610. Stopper, 611. Pushing template, 612. Top template;

[0065] 7. Liquid storage system, 71. Standard solution storage tank, 72. Buffer solution storage tank, 73. Hydrochloric acid storage tank, 74. Sodium hydroxide storage tank;

[0066] 8. Liquid adding system, 81. First liquid adding pump, 82. Second liquid adding pump, 83. Third liquid adding pump, 84. Fourth liquid adding pump, 85. Fifth liquid adding pump, 86. Sixth liquid adding pump;

[0067] 9. Air suction system, 91. Spring air duct, 92. Air exhaust duct, 93. Connector;

[0068] 10. Waste filter membrane clip collection bin;

[0069] 11. filter membrane clamp, 111. membrane clamp cover, 1111. first through hole, 1112. protrusion, 1113. conical hole, 112. silicone sealing gasket, 1121. sealing gasket through hole, 113. filter membrane, 114. membrane clamp seat, 1141. second through hole, 1142. positioning groove, 1143. limiting card edge. DETAILED DESCRIPTION

[0070] The present invention will be further described in detail below with reference to specific embodiments.

[0071] A fluoride automatic measuring instrument, combined with Figures 1 to 23 As shown, it includes a frame 1, a controller, a film storage system 2, a sampling device 4, a shearing device 6 and a reaction device 5.

[0072] The rack 1 is configured as a vertical frame, and is sequentially divided from top to bottom into a rack top plate 1a, a rack middle plate 1b, and a rack bottom plate 1c.

[0073] The controller is used to control the overall operation of the device. The controller in the present invention adopts a PLC controller, and other types of controllers can also be used. The controller is arranged in a magnetic-proof box to prevent strong magnetic fields from interfering with the controller.

[0074] The frame 1 is provided with a membrane storage system 2, a sampling device 4, a shearing device 6 and a reaction device 5 in sequence. The membrane storage system 2 is used to store the filter membrane clips.

[0075] The sampling device 4 corresponds to the outlet of the membrane storage system 2 and is used for sampling the filter membrane. The shearing device 6 corresponds to the outlet of the sampling device 4 and is used for shearing the filter membrane after sampling. The reaction device 5 is located below the shearing device 6 and is used for extracting and measuring the fluoride in the filter membrane after shearing.

[0076] An automatic membrane clamp pushing device 3 is provided on the frame 1 located on the other side of the membrane storage system 2. The automatic membrane clamp pushing device 3 is used to push the membrane clamps in the membrane storage system 2 into the sampling device 4 and the shearing device 6 in sequence and step by step, and finally push them into the waste membrane clamp bin.

[0077] The controlled ends of the filter membrane clamp automatic pushing device 3, the sampling device 4, the shearing device 6 and the reaction device 5 are respectively connected to the output ends of the controller.

[0078] The membrane clamp automatic pushing device 3, the membrane storage system 2, the sampling device 4, and the shearing device 6 are sequentially arranged on the frame middle plate 1b, and the top of the membrane storage system 2 protrudes from the frame top plate 1a. The reaction device 5 is arranged on the frame bottom plate 1c.

[0079] A waste filter membrane clip collection bin 10 is also provided on the frame 1 located on one side of the shearing device 6, for collecting the waste filter membrane clips after shearing, and the filter membrane clip automatic pushing device 3 can push the waste filter membrane clips after shearing into the waste filter membrane clip collection bin 10. A collection port is provided on the side wall of the waste filter membrane clip collection bin 10, and the direction of the collection port is the same as the pushing direction of the filter membrane clip automatic pushing device.

[0080] The filter membrane holder 11 of the present invention is combined with Fig. 27 As shown, it includes a membrane clamp seat 114, a membrane clamp cover 111, a filter membrane 113 and a silicone sealing pad 112. The silicone sealing pad 112 includes an upper silicone sealing pad and a lower silicone sealing pad. The membrane clamp seat 114, the lower silicone sealing pad, the filter membrane 113, the upper silicone sealing pad and the membrane clamp cover 111 are arranged in sequence from bottom to top.

[0081] The membrane clamp cover 111 is provided with a first through hole 1111. The membrane clamp cover 111 is embedded and clamped inside the membrane clamp seat 114.

[0082] The filter membrane 113 is sealed and clamped between the membrane clamp seat 114 and the membrane clamp cover 111, and can adsorb suspended particles in the ambient air.

[0083] A positioning groove 1142 is provided on the top surface of the membrane clamp seat 114 , and the positioning groove 1142 is used to position the filter membrane 113 and the membrane clamp cover 111 .

[0084] The membrane clamp seat 114 is provided with a second through hole 1141 which is located directly below the first through hole 1111 .

[0085] Silicone sealing pads 112 are bonded to the inside of the positioning groove 1142 of the membrane clamp seat 114 and the bottom end surface of the membrane clamp cover 111, respectively. The silicone sealing pad 112 is provided with a sealing pad through hole 1121 located directly below the first through hole 1111. The two silicone sealing pads provided in the present invention can play a sealing role and enhance the air tightness of the filter membrane clamp, ensuring that all inhaled gases are filtered through the filter membrane without leaking from the gap between the membrane clamp seat and the membrane clamp cover, thereby ensuring the accuracy of subsequent sampling.

[0086] A plurality of limiting clamp edges 1143 pointing to the inner side of the positioning groove 1142 are arranged at the junction of the top end surface of the membrane clamp seat 114 and the inner side wall of the positioning groove 1142, and a membrane clamp cover positioning groove is formed between each limiting clamp edge 1143 and the inner side wall of the positioning groove 1142. A plurality of protrusions 1112 matching the membrane clamp cover positioning grooves are arranged on the side wall of the membrane clamp cover 111, and the bottom end surface of the limiting clamp edge 1143 is in close contact with the top end surface of the protrusion 1112.

[0087] The membrane clamp seat 114, the filter membrane 113, the membrane clamp cover 111, the silicone sealing pad 112 and the positioning groove 1142 are respectively arranged in a rectangular shape, and the first through hole 1111, the second through hole 1141 and the sealing pad through hole 1121 are respectively arranged in a circular shape. In addition, the first through hole 1111, the second through hole 1141 and the sealing pad through hole 1121 are arranged concentrically, which can ensure that the filter membrane can be sheared after the sampling is completed.

[0088] A conical hole 1113 communicating with the first through hole 1111 is also formed on the top surface of the membrane clamp cover 111 , and the conical hole 1113 expands outward from bottom to top.

[0089] Membrane storage system 2, combined Figures 9 to 11 As shown, it includes a film storage bin positioning frame 21 and a film storage bin 22. The film storage bin 22 is fixedly arranged at the top of the film storage bin positioning frame 21, and is used to store the filter membrane clip. The interior of the film storage bin 22 is in the shape of a hollow cavity, and the inner cavity of the film storage bin 22 is adapted to the filter membrane clip, so that the filter membrane clip can be placed inside the film storage bin 22 for storage.

[0090] The membrane storage bin 22 in the present invention is in the shape of a rectangular box, and can also be set to other shapes. The specific shape is adjusted according to the shape of the filter membrane clip.

[0091] The side wall of the film storage bin 22 is open, and a removable side panel 226 that can be opened is provided at the opening. When the filter membrane clip is placed, the removable side panel 226 can be pulled out upward to place the filter membrane clip into the film storage bin 22. Specifically, a slideway is provided at the opening of the side wall of the film storage bin 22, and a slide rail that matches the slideway is provided on the removable side panel 226, so that the removable side panel 226 can be pulled out in the film storage bin 22.

[0092] A filter membrane clamp discharge gap 225 is formed between the film storage bin 22 and the film storage bin positioning frame 21, and the filter membrane clamp discharge gap 225 is arranged to penetrate from front to back.

[0093] The film storage bin 22 includes a first film storage bin 221 and a second film storage bin 222 arranged in parallel. The first film storage bin 221 and the second film storage bin 222 are arranged on a film storage bin positioning frame 223, and the bottom end of the film storage bin positioning frame 223 is fixedly arranged on the film storage bin positioning frame 21.

[0094] A plurality of top positioning grooves a211 are provided on the top surface of the film storage bin positioning frame 21, and a plurality of positioning protrusions 224 are provided on the bottom end of the film storage bin positioning frame 223. The positioning protrusions 224 match the top positioning grooves a211 and partially expose the top surface of the film storage bin positioning frame 21. The film storage bin positioning frame 21 and the film storage bin positioning frame 223 are fixed by screws.

[0095] Specifically, the filter membrane clamp discharge gap 225 is formed by the bottom wall of the film storage bin positioning frame 223 , the side walls of the positioning protrusion 224 and the top wall of the film storage bin positioning frame 21 .

[0096] The thickness of the filter membrane clamp of the present invention is the same as the vertical opening of the filter membrane clamp discharge gap 225, which ensures that the filter membrane clamp can be effectively pushed out while ensuring that the upper and lower ends of the filter membrane clamp are in a sealed state and not in direct contact with the outside atmosphere.

[0097] In the present invention, three top positioning grooves a211 are provided, and three positioning protrusions 224 are correspondingly provided. The filter membrane clamp discharge gap 225 is divided into two by the three positioning protrusions 224, and each filter membrane clamp discharge gap 225 corresponds to the discharge port of the upper film storage bin.

[0098] The film storage bin positioning frame 21 is arranged on the filter membrane clamp automatic pushing mechanism 3 , and the filter membrane clamp automatic pushing mechanism 3 is used to push out the filter membrane clamp in the filter membrane clamp discharge gap 225 .

[0099] Automatic filter clamp push device 3, combined with Figures 5 to 11 As shown, it includes a horizontal support platform 31 positioned on the fluoride automatic measuring instrument and a movable frame 32 arranged above the horizontal support platform 31.

[0100] The film storage bin 22 is positioned on the movable frame 32 .

[0101] The rear end of the movable frame 32 is configured as a film storage bin positioning frame 321 for positioning the film storage bin 22. The bottom end of the film storage bin positioning frame 321 is provided with a bottom end groove 323, and the top surface of the film storage bin positioning frame 321 is provided with a top slide 322 and a top positioning groove b324. There are four top slides 322, and three top positioning grooves b324.

[0102] A push arm 33 is arranged in the movable frame 32 through a push arm driving mechanism 34. The push arm 33 corresponds to the filter membrane clamp discharge gap 225 and is used to push the filter membrane clamp. The controlled end of the push arm driving mechanism 34 is connected to the output end of the controller.

[0103] The push arm 33 is a rectangular plate-shaped push arm in the shape of a thin sheet, and the thickness of the push arm 33 is smaller than the vertical opening of the filter membrane clamp discharge gap 225, so that the push arm 33 can push the filter membrane clamp in the filter membrane clamp discharge gap 225. At the same time, the thickness of the filter membrane clamp is the same as the vertical opening of the filter membrane clamp discharge gap 225, which ensures that the filter membrane clamp can be effectively pushed out, and at the same time, the upper and lower ends of the filter membrane clamp are in a sealed state and do not contact the outside atmosphere.

[0104] The push arm 33 includes a first push arm 331 corresponding to the position of the first film storage bin 221 and a second push arm 332 corresponding to the position of the second film storage bin 222. The push arm driving mechanism 34 includes a first push arm driving mechanism for driving the first push arm 331 and a second push arm driving mechanism having the same structure as the first push arm driving mechanism for driving the second push arm 332.

[0105] The filter membrane clamp discharge gap 225 can be divided into a first filter membrane clamp discharge gap corresponding to the position of the first push arm 331 and a second filter membrane clamp discharge gap corresponding to the position of the second push arm 332 .

[0106] The push arm driving mechanism 34 includes a first lead screw 341, a nut and a driving mechanism. The first lead screw 341 is rotatably arranged on the front and rear side walls of the movable frame 32, and the first lead screw 341 passes through the top slide 322. The nut is matched with the first lead screw 341, and the top end is fixed to the push arm 33. The driving mechanism is used to drive the first lead screw 341 to rotate, and the controlled end of the driving mechanism is connected to the output end of the controller.

[0107] The driving mechanism includes a driven gear 343 , a driving gear 342 and a motor. The driven gear 343 is connected to one end of the first lead screw 341 extending out of the movable frame 32 , and the driving gear 342 is rotatably disposed on the movable frame 32 and meshes with the driven gear 343 .

[0108] The motor is connected to the driving gear 342 via a connecting shaft, and is used to drive the driving gear 342 to rotate. The controlled end of the motor is connected to the output end of the controller.

[0109] Guide rods 344 are fixedly provided on the front and rear side walls of the movable frame 32 . The guide rods 344 movably pass through the nut to guide the nut when it moves.

[0110] When multiple sampling stations are provided in the sampling equipment, in order to enable the device to push the filter membrane clamp into different sampling stations, a transverse moving mechanism 35 is provided between the horizontal support platform 31 and the movable frame 32. The transverse moving mechanism 35 is used to drive the movable frame 32, the film storage bin 22 and the push arm 33 to move left and right to switch the pushing stations. The controlled end of the transverse moving mechanism 35 is connected to the output end of the controller.

[0111] The horizontal moving mechanism 35 includes a slideway a351 which is horizontally arranged on the horizontal support platform 31, and the bottom end of the movable frame 32 is slidably mounted on the slideway a351. A pair of vertical positioning plates 352 which are arranged in the same direction as the bottom groove 323 are fixedly arranged on the horizontal support platform 31, and one vertical positioning plate 352 is arranged below the bottom groove 323. A second lead screw 353 is rotatably connected between the two vertical positioning plates 352, and a movable nut 354 which is fixed to the film storage bin positioning frame 321 is mounted on the second lead screw 353. One end of the second lead screw 353 extending from the vertical positioning plate 352 is connected to a driving motor a355, and the controlled end of the driving motor a355 is connected to the output end of the controller.

[0112] The horizontal support platform 31 located on one side of the film storage bin positioning frame 321 is also provided with a limiting mechanism 36, which is used to limit the movement position of the film storage bin positioning frame 321, and the output end of the limiting mechanism 36 is connected to the input end of the controller.

[0113] The limit mechanism 36 includes a limit switch 361 and a vertical contact plate 362. The limit switch 361 is fixedly arranged on the top surface of the horizontal support platform 31. The vertical contact plate 362 is fixedly arranged on the side wall of the film storage bin positioning frame 321 and corresponds to the position of the limit switch 361. The output end of the limit switch 361 is connected to the input end of the controller.

[0114] In order to better control the pushing position of the push arm 33 and ensure that the device can control the push arm 33 to stop pushing when the filter membrane clamp in the membrane storage bin 22 is pushed out, the present invention is provided with position detection mechanisms 37 at both ends of the side walls of the movable frame 32, and the two position detection mechanisms 37 are respectively used to detect the pushing positions of the first push arm 331 and the second push arm 332.

[0115] The position detection mechanism 37 includes a position sensor bracket 372 and a position sensor 371 disposed on the position sensor bracket 372. The height position of the position sensor 371 is flush with the height position of the push arm, and can sense the position of the push arm and feed back the position signal of the push arm to the controller. When the push arm moves backward to the sensing area of ​​the push arm 371, that is, the backward movement position of the push arm just pushes out the filter membrane clip in the membrane storage bin 22, the position sensor 371 cannot sense the position of the push arm at this time, and no longer feeds back the position signal of the push arm to the controller. After the controller cannot receive the position signal of the push arm, it controls the push arm driving mechanism 34 to stop operating, thereby controlling the push position of the push arm.

[0116] In the initial position, the push arm 33 is located in the filter membrane clamp discharge gap 225 below the membrane storage bin 22 to maintain the sealing of the membrane storage bin.

[0117] Sampling device 4, combined with Figures 12 to 15 As shown, it includes a sampling box 41, a movable clamping plate 44, a detection membrane slot 441, a sealing drive mechanism 45, a sampling structure 42, a blank test structure 43, a sealing top plate 49, and an air intake system 9.

[0118] The sampling box 41 is surrounded by a supporting frame, and the interior of the sampling box 41 is hollow.

[0119] A movable clamping plate 44 is provided in the sampling box 41, and a sealing top plate 49 is provided below the movable clamping plate 44 through a spring connection. The sealing top plate 49 is driven by a sealing driving mechanism 45 provided in the sampling box 41 to move up and down. A detection membrane clamping groove 441 is formed between the movable clamping plate 44 and the top of the inner wall of the sampling box 41 and between the movable clamping plate 44 and the sealing top plate 49, respectively, and the detection membrane clamping groove 441 is used to hold the filter membrane clamp.

[0120] The top of the movable clamping plate 44 is fixed with a plurality of protrusions 442, and the top of the inner wall of the sampling box 41 is provided with a plurality of grooves 411 respectively matched with the protrusions 442. When the sealing driving mechanism 45 drives the sealing top plate 49 and the movable clamping plate 44 to move upward, the protrusions 442 can enter the grooves 411, thereby forming two detection membrane clamping grooves for clamping and sealing the filter membrane clamp between the top of the movable clamping plate 44 and the top of the inner wall of the sampling box 41. At the same time, two detection membrane clamping grooves are formed between the movable clamping plate 44 and the sealing top plate 49.

[0121] The sampling device 4 can simultaneously hold four filter membrane clips, two of which can be placed on the upper side of the movable clamping plate 44, with the blank test filter membrane clip on the left and the sampling filter membrane clip on the right; two of which can be placed on the lower side of the movable clamping plate 44, with the blank test filter membrane clip on the left and the sampling filter membrane clip on the right. When the movable clamping plate 44 and the sealing top plate 49 are pulled downward, the filter membrane clips can be placed in steps, and when the movable clamping plate 44 and the sealing top plate 49 are pushed upward, the four filter membrane clips are simultaneously pressed and sealed.

[0122] The top of the sampling box 41 is provided with a sampling structure 42 and a blank test structure 43. The sampling structure 42 is used for filtering and sampling the ambient gas. The blank test structure 43 is the same as the sampling structure 42 and is used for performing a blank control test.

[0123] There are four detection membrane slots 441, including two detection membrane slots a connected to the sampling structure 42 and two detection membrane slots b connected to the blank test structure 43. The filter membrane clips placed in the upper and lower detection membrane slots b on the left are used as full-time blanks, and the filter membrane clips placed in the upper and lower detection membrane slots a on the right are used as actual samples.

[0124] The sampling structure 42 includes a sampling air inlet pipe 421, which is arranged at the top of the sampling box 41 and is connected to the detection membrane card slot a.

[0125] The blank test structure 43 includes a blank test air inlet pipe 431 , which is disposed at the top of the sampling box 41 and communicated with the detection membrane card slot b.

[0126] The sampling structure 42 and the blank test structure 43 are respectively provided with filter membrane support structures, that is, the filter membrane support structures are respectively provided inside the sampling air inlet pipe 421 and the blank test air inlet pipe 431 .

[0127] The filter membrane support structure includes a filter membrane mesh pad and a spacer ring. The filter membrane mesh pad is provided with two layers, the filter membrane mesh pad is a stainless steel support filter membrane mesh pad. There is a spacer ring between the two layers of filter membrane mesh pads.

[0128] The sealing drive mechanism 45 includes a steering air duct 453 and a lifting mechanism. The controlled end of the sealing drive mechanism 45 is connected to the output end of the controller, and the sealing drive mechanism 45 is used to drive the sealing top plate 49 and the movable clamping plate 44 to move up and down, thereby opening and closing the detection membrane clamping slot, so as to facilitate the replacement and placement of the filter membrane clamp.

[0129] A plurality of second guide rollers 459 that movably pass through the movable clamping plate 44 are fixedly provided at the top end of the sealing top plate 49 , and a second spring 4510 that is sleeved on the outside of the second guide rollers 459 is connected and provided between the sealing top plate 49 and the movable clamping plate 44 .

[0130] The turning air duct 453 is fixedly arranged at the bottom end of the sealing top plate 49 and is located directly below the sampling structure 42. The sealing top plate 49 is provided with two through holes connected to the detection membrane card slot a and the detection membrane card slot b respectively. The turning air duct 453 is located directly below the detection membrane card slot a and is connected to the detection membrane card slot a.

[0131] The lifting mechanism is arranged below the turning air duct 453, and is used for driving the turning air duct 453 and the sealing top plate 49 to rise and fall, and the controlled end of the lifting mechanism is connected to the output end of the controller.

[0132] The lifting mechanism includes a lead screw a454, a nut a455 and a drive motor b456. The lead screw a454 is rotatably arranged on the bottom wall of the sampling box 41, and the lead screw a454 is vertically arranged, and the top end extends into the interior of the sampling box 41. The nut a455 is arranged in the sampling box 41 and matched with the lead screw a454. The drive motor b456 is connected to one end of the lead screw a454 extending out of the sampling box 41, and the controlled end of the drive motor b456 is connected to the output end of the controller.

[0133] The nut a455 is provided with a nut connecting plate a4511 through screw connection. A first transverse plate 4531 is fixedly provided at the bottom end of the side wall of the turning air duct 453, and a second transverse plate 4532 is fixedly provided at the top end of the side wall of the turning air duct 453. A guide roller 457 which moves through the nut connecting plate a4511 and the first transverse plate 4531 in sequence is detachably provided at the bottom end of the inner wall of the sampling box 41, and the bottom end of the guide roller 457 is provided on the sampling box 41 through bolt connection, and the top end of the guide roller 457 extends between the first transverse plate 4531 and the second transverse plate 4532, and the top end is not connected to the second transverse plate 4532. A first spring 458 which is sleeved on the outside of the guide roller 457 is fixedly provided between the top end of the nut connecting plate a4511 and the bottom end of the first transverse plate 4531.

[0134] A plurality of vertically arranged movable guide rails 452 are detachably connected in the sampling box 41, and the sealing top plate 49 passes through the movable guide rails 452 and can slide up and down along the movable guide rails 452. The arranged sealing top plate 49 makes the movable guide rails 452 more stable when moving up and down without deflection.

[0135] The sampling structure 42 and the detection membrane card slot a are connected to an air suction system 9, which is used to suck ambient air to achieve the sampling purpose of the sampling structure. The controlled end of the air suction system 9 is connected to the output end of the controller. The blank test structure 43 on the left is not connected to the air suction system 9, thereby achieving the purpose of a blank test.

[0136] The air intake system 9 includes a spring air duct 91 connected to the steering air duct 453, an air extraction pipe 92 connected to the spring air duct 91, and a sampling pump connected to the air extraction pipe 92, and the controlled end of the sampling pump is connected to the output end of the controller. A connector 93 is provided at one end of the air extraction pipe 92, and the sampling pump and the connector 93 are connected through a connecting pipe.

[0137] A flow meter 47 for counting the gas collection flow rate is connected to the side of the exhaust duct 92, and the output end of the flow meter 47 is connected to the input end of the controller. The flow meter 47 in the present invention is a mass flow meter.

[0138] A limiter a48 is fixedly arranged on the inner wall of the sampling box 41. The limiter a48 is used to limit the moving position of the sealing top plate 49. The output end of the limiter a48 is connected to the input end of the controller. The limiter a48 is a travel switch. When the sealing top plate 49 moves upward and touches the limiter a48, the limiter a48 will feed back the position signal of the sealing top plate 49 at this time to the controller, and then the controller controls the sealing top plate 49 to stop moving upward, achieving a good limiting effect.

[0139] The present invention is mainly suitable for the collection of gaseous and particulate fluorides in the air. The sampling flow rate can be set arbitrarily between 10L / min and 60L / min under a load of less than 20kPa at the air inlet end. The sampling time can be set arbitrarily between 1min and 99h, or the gas collection volume under standard conditions can be set arbitrarily between 1 and 999m3. Under the conditions of set flow rate and set time control setting, the flow rate change from the start of sampling to the end of sampling is less than ±5%, which meets the requirements of HJ955-2018.

[0140] When the sampling device 4 of the present invention is replacing or taking the filter membrane clip, the sealing top plate 49 and the movable clamping plate 44 are pulled downward by the sealing driving mechanism 45. The film storage bin has two gears, one gear is aligned with the detection membrane card slot a between the movable clamping plate 44 on the left and the top of the inner wall of the sampling box 41, and the other gear is aligned with the detection membrane card slot b between the movable clamping plate 44 on the right and the sealing top plate 49. In conjunction with the lateral movement of the automatic pushing device for the filter membrane clip, the filter membrane clip in any film storage bin (a total of two film storage bins) can be pushed into any sampling station (a total of four stations, and the sampling stations are all glued with silicone sheets for sealing), and then pushed upward by the sealing driving mechanism 45 until the seal is ensured. The air intake system 9 starts to work, and the flow meter 47 controls and records the flow.

[0141] Shearing device 6, combined Figures 16 to 21 As shown, it includes a shearing machine box 61, a film holding plate 65, a presser 63, a circular cutting knife 62, a push plate 611, a driving mechanism 64 and a paper shredding mechanism 67.

[0142] The shearing machine box 61 is configured as a frame body, and is hollow inside. A film holding plate 65, a pressing device 63, a circular cutting knife 62 and a push plate 611 are arranged inside the shearing machine box 61.

[0143] The membrane holding plate 65 is used to hold the pushed-in filter membrane clip, and a circular leak hole is provided on the membrane holding plate 65 to match the circular cutting knife 62 and allow the cut filter membrane to fall out. A filter membrane holding groove 651 is provided at the top of the membrane holding plate 65, and the filter membrane holding groove 651 is arranged through the front and back to hold the filter membrane clip, and the circular leak hole is provided on the bottom wall of the filter membrane holding groove 651.

[0144] The presser 63 is arranged just above the membrane holding plate 65, and is used to press the filter membrane clamp into the membrane holding plate 65. The presser 63 comprises a bottom template 631, and the bottom end of the bottom template 631 is arranged in a cylindrical shape, and is used to press the membrane clamp.

[0145] Two slideways b634 are provided on the left and right inner walls of the shearing machine box 61, and the two side walls of the bottom template 631, the middle template 621 and the top template 612 are slidably mounted on the two slideways b634 in sequence. A connecting column 635 is also connected between the bottom template 631, the middle template 621 and the top template 612. Reset springs are respectively provided between the bottom template 631 and the middle template 621, and between the middle template 621 and the top template 612.

[0146] The circular cutter 62 is arranged just above the membrane holding plate 65, in a cylindrical shape, on the inner side of the sleeve of the presser 63, and is used to cut the filter membrane clip in the membrane holding plate 65. The circular cutter 62 is a circular cylindrical blade, and the circular cutter 62 is fixedly arranged at the lower part of the middle template 621. The circular cutter 62 can protrude from the bottom template 631, so that when the bottom template 631 clamps the filter membrane clip, the filter membrane on the filter membrane clip can be cut by the circular cutter 62.

[0147] The pusher template 611 is located inside the circular cutter 62 and is arranged just above the film holding plate 65, and is used to push the filter membrane cut by the circular cutter 62 downward to the paper feeding mechanism 66 arranged just below the film holding plate 65. The pusher template 611 includes a guide cylinder and a transverse spring steel sheet, and the top end of the guide cylinder is fixedly arranged on the top template 612.

[0148] The top of the pressing device 63, the circular cutting knife 62 and the pusher plate 611 are driven to rise and fall by the driving mechanism 64, and the controlled end of the driving mechanism 64 is connected to the output end of the controller. The driving mechanism 64 includes a motor 641, and the output shaft end of the motor 641 is connected to a screw rod 643, and a connecting plate 642 is fixedly provided on the top plate 612. The connecting plate 642, the top plate 612 and the guide cylinder are respectively matched with the screw rod, and the circular cutting knife 62 and the pressing device 63 are driven to rise and fall when the screw rod of the motor 641 rotates.

[0149] The clamp 63 , the circular cutting knife 62 and the push plate 611 are arranged in sequence from the outside to the inside. During the membrane cutting process, the filter membrane clamp is clamped by the clamp 63 , the circular cutting knife 62 performs the circular cutting, and then the push plate 611 pushes the cut membrane into the paper feeding mechanism 66 .

[0150] The shredder mechanism 67 is arranged below the membrane holding plate 65 and is used to shred the cut filter membrane. A discharge port is arranged at the bottom of the shredder mechanism 67 and the discharge port can transport the shredded filter membrane into the reaction device. The controlled end of the shredder mechanism 67 is connected to the output end of the controller.

[0151] The shredding mechanism 67 includes two rows of shredding knives 671 arranged in an interlaced manner and a shredding driving motor 672 connected to the two rows of shredding knives 671 through a driving assembly. The shredding driving motor 672 is used to drive the two rows of shredding knives 671 to move relative to each other. The controlled end of the shredding driving motor 672 is connected to the output end of the controller. When the driving assembly drives the two rows of shredding knives 671 to move relative to each other, the shredding function is realized. The driving assembly can be driven in the form of a cam or a connecting rod, or in other forms, as long as the function of the two rows of shredding knives 671 moving relative to each other can be realized.

[0152] For example, the driving assembly can also be driven by a lead screw and a nut, that is, two paper shredding driving motors are provided, the output shaft of each paper shredding driving motor is respectively connected to a lead screw, and the two lead screws are respectively equipped with a lead nut, and each lead nut is fixedly connected to a row of paper shredding knives. The driving directions of the two paper shredding driving motors are opposite, thereby driving the two rows of paper shredding knives to move relative to each other.

[0153] A paper feeding mechanism 66 is also provided directly below the circular leakage hole of the film holding plate 65 . The paper feeding mechanism 66 is used to transfer the cut filter membrane to the inside of the paper shredding mechanism 67 . The controlled end of the paper feeding mechanism 66 is connected to the output end of the controller.

[0154] The paper feeding mechanism 66 includes a paper feeding roller 661 and a paper feeding drive motor 662 connected to the paper feeding roller 661 for driving the paper feeding roller 661 to rotate. The controlled end of the paper feeding drive motor 662 is connected to the output end of the controller. When the paper feeding drive motor 662 is in operation, it can drive the paper feeding roller 661 to rotate, and then transport the filter membrane falling on the paper feeding roller 661 to the inside of the paper shredding mechanism 67.

[0155] A paper discharge funnel 68 is also provided at the bottom of the discharge port of the paper shredding mechanism 67. The paper discharge funnel 68 is used to transport the shredded filter membrane to the inside of the reaction device. The paper discharge funnel 68 is arranged in an inclined shape, and the internal cross section of the paper discharge funnel 68 decreases from top to bottom.

[0156] The sheared filter membrane will generate static electricity during the shearing process, causing the sheared filter membrane to be adsorbed on the cutter and inside the paper discharge funnel 68, affecting the subsequent extraction of fluoride. In order to prevent the above problems from occurring, the outer wall of the paper discharge funnel 68 of the present invention is provided with a static removal system 69 for removing static electricity, and the paper shredding mechanism 67 and the discharge port of the paper discharge funnel 68 are provided with an air supply system. The static electricity generated during the paper shredding process and the conveying process is eliminated by blowing ion wind through the static removal system 69, and the controlled end of the air supply system and the static removal device is connected to the output end of the controller.

[0157] The bottom end of the shearing machine box 61 is arranged on a moving mechanism, and the moving mechanism is used to drive the device to move left and right as a whole, and the controlled end of the moving mechanism is connected to the output end of the controller. The moving mechanism is a lead screw driving mechanism, including a lead screw rotatingly arranged on the fluoride automatic measuring instrument and a moving driving motor connected to one end of the lead screw. The lead screw is matched with the bottom end of the shearing machine box 61, and can drive the device as a whole to move left and right on the fluoride automatic measuring instrument, thereby realizing that the paper discharge funnel 68 and the measuring system 56 can be moved to align with the reaction device.

[0158] A limiter 610 is arranged on the side wall of the bottom end of the shearing machine box 61, and the output end of the limiter 610 is connected to the input end of the controller, thereby being able to limit the moving position of the device.

[0159] Reaction device 5, combined with Figure 22 to Figure 26 As shown, it includes a reaction box 51, a reaction system 55, a liquid collecting bag 53, a bottom valve 59, a bottom valve driving mechanism 54, a liquid adding pipe bracket 58, a measuring system 56 and a drainage system 57.

[0160] The reaction box 51 is provided with a reaction system 55 which can add liquid through the liquid adding system 8 and extract the fluoride in the filter membrane. The reaction box 51 is also provided with a measuring system 56 which can be inserted into the reaction system 55 to measure fluoride. The controlled end of the reaction system 55 is connected to the output end of the controller, and the measuring system 56 is interactively connected with the controller.

[0161] The reaction system 55 includes a reaction tank 52 , a liquid preparation tank 521 , an electrode protection tank 524 , an ultrasonic separation mechanism, and a thermostat 553 .

[0162] A liquid collecting capsule 53 for containing and discharging residual liquid is provided below the reaction tank 52 and the liquid dispensing tank 521. The top of the liquid collecting capsule 53 is fixedly arranged on the reaction machine box 51.

[0163] A drainage system 57 for discharging the reacted liquid is provided on the side wall of the liquid collecting capsule 53, and a controlled end of the drainage system 57 is connected to the output end of the controller. The drainage system 57 includes a drainage pipe provided on the side wall of the liquid collecting capsule 53 and a solenoid valve provided on the drainage pipe, and a controlled end of the solenoid valve is connected to the output end of the controller.

[0164] The bottom ends of the reaction tank 52 , the liquid preparation tank 521 and the electrode protection tank 524 are provided with bottom valves 59 , and the bottom end of the bottom valve 59 is provided with a bottom valve driving mechanism 54 for driving the bottom valve 59 to rise and fall to realize whether to discharge liquid.

[0165] The bottom valve driving mechanism 54 includes a support plate 541 disposed at the bottom end of the liquid collecting capsule 53, a guide column 542 disposed on the box body 1 and slidably connected to the support plate 541, a nut connecting plate b543 connected to the support plate 541 through a spring 547, and a lifting mechanism for driving the nut connecting plate b543 to rise and fall. A sealing cavity 548 is integrally provided at the top end of the support plate 541, and the sealing cavity 548 is disposed in the liquid collecting capsule 53. The top end of the sealing cavity 548 contacts the bottom valve 59 to support the bottom valve 59. When the sealing cavity 548 moves downward, the bottom valve 59 can be opened.

[0166] The lifting mechanism includes a nut b545, a screw b544 matched with the nut b545, and a driving motor 546 connected to one end of the screw b544. The nut b545 is fixedly connected to the nut connecting plate b543. The bottom end of the screw b544 is rotatably set on the box body 1 through a bearing, and the controlled end of the driving motor 546 is connected to the output end of the controller.

[0167] The reaction tank 52 is arranged on the top surface of the reaction machine box 51, and the reaction tank 52 includes a reaction tank a522 and a reaction tank b523.

[0168] The liquid preparation tank 521 can transport the prepared reaction liquid into the reaction tank 52 .

[0169] The reaction tank 52 is provided with an ultrasonic separation mechanism for separating fluoride from the solution after the filter membrane is added, and the controlled end of the ultrasonic separation mechanism is connected to the output end of the controller.

[0170] The ultrasonic separation mechanism includes an ultrasonic oscillator 552 disposed on the outer wall of the reaction tank and an electromagnetic stirrer 554 disposed in the reaction tank, and the controlled ends of the ultrasonic oscillator 552 and the electromagnetic stirrer 554 are respectively connected to the output end of the controller. The ultrasonic oscillator 552 and the electromagnetic stirrer 554 are positioned on the outer wall of the reaction tank through a positioning card plate 555.

[0171] The ultrasonic oscillator 552 can transmit the generated ultrasonic wave into the reaction tank for separation of fluoride. At the same time, the electromagnetic stirrer 554 can stir 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.

[0172] The electromagnetic stirrer 554 in the present invention includes a drive shaft 5542, an electromagnetic stirring motor 5541, a magnetic block 5543, and a rotor 5544. The drive shaft 5542 and the magnetic block 5543 are arranged in the sealed cavity 548, the magnetic block 5543 is fixedly arranged at the top of the drive shaft 5542, and the electromagnetic stirring motor 5541 is connected to the drive shaft 5542. The rotor 5544 is arranged in the reaction tank and the liquid preparation tank 521, and when the electromagnetic stirring motor 5541 drives the drive shaft 5542 and the magnetic block 5543 to rotate, the rotor 5544 can be driven to rotate, thereby stirring the solution inside.

[0173] The outer wall of the reaction tank is also provided with a thermostat 553, and the controlled end of the thermostat 553 is connected to the output end of the controller. The function of the thermostat 553 is to keep the solution in the reaction tank at a constant temperature within plus or minus two degrees during electrode detection as required by the standard.

[0174] The measuring system 56 includes a measuring electrode 561 and a measuring electrode driving mechanism for controlling the movement of the measuring electrode 561 in space. The output end of the measuring electrode 561 is connected to the input end of the controller, and the controlled end of the measuring electrode driving mechanism is connected to the output end of the controller.

[0175] The reaction tanks include a reaction tank a522 and a reaction tank b523. The liquid preparation tank 521, the reaction tank a522, the reaction tank b523 and the electrode protection tank 524 are respectively arranged on the reaction machine box 51 and can be connected to the liquid collecting bag 53 respectively.

[0176] The drying system 563 in the present invention is arranged on the electrode protection tank 524, and the drying system 563 is connected to the blowing system.

[0177] The liquid storage system 7 and the liquid adding system 8 are arranged above the reaction device 5. The liquid adding pipelines of the liquid adding system 8 are gathered on the liquid adding pipe bracket 58, and liquid is added to the liquid preparation tank 521, the reaction tank a 522 and the reaction tank b 523 through the liquid adding pipe head 581. The controlled end of the liquid adding system 8 is connected to the output end of the controller.

[0178] The liquid adding tube bracket 58 and the measuring system 56 are fixed on the shearing device 6 and can move up and down. The shearing device 6 can move laterally to drive the liquid adding tube head 581 and the measuring system 56 to align with the liquid preparation tank 521, reaction tank a522, and reaction tank b523 for liquid adding, flushing and testing.

[0179] The liquid adding system 8 includes a first liquid adding pump 81, a second liquid adding pump 82, a third liquid adding pump 83, a fourth liquid adding pump 84, a fifth liquid adding pump 85, and a sixth liquid adding pump 86. The liquid storage system 7 includes a standard liquid storage tank 71, a buffer storage tank 72, a hydrochloric acid storage tank 73, and a sodium hydroxide storage tank 74. The liquid inlet end of the first liquid adding pump 81 is connected to the standard liquid storage tank 71 through a pipeline, the liquid inlet end of the second liquid adding pump 82 is connected to the water supply pipeline through a pipeline, the liquid inlet end of the fourth liquid adding pump 84 is connected to the buffer storage tank 72 through a pipeline, the liquid inlet end of the fifth liquid adding pump 85 is connected to the hydrochloric acid storage tank 73 through a pipeline, and the liquid inlet end of the sixth liquid adding pump 86 is connected to the sodium hydroxide storage tank 74 through a pipeline. The liquid outlet ends of the first liquid adding pump 81, the liquid outlet ends of the second liquid adding pump 82, the liquid outlet ends of the third liquid adding pump 83, the liquid outlet ends of the fourth liquid adding pump 84, the liquid outlet ends of the fifth liquid adding pump 85, and the liquid outlet ends of the sixth liquid adding pump 86 are respectively connected to the liquid adding pipe head 581 on the liquid adding pipe bracket 58 through pipelines.

[0180] The first liquid adding pump 81 pumps the reserve standard solution in the standard solution reserve tank 71 into the liquid preparation tank 521, which is the standard solution use liquid tank. The second liquid adding pump 82 adds water into the liquid preparation tank 521, dilutes the standard solution use liquid with water to a specified concentration, and then the third liquid adding pump 83 pumps a certain amount of the standard solution use liquid from the use liquid extraction pipe 582 into the reaction tank a522, and the fourth liquid adding pump 84 pumps a certain amount of buffer solution from the buffer solution reserve tank 72, and the second liquid adding pump 82 dilutes the standard solution with water to a specified concentration, and draws a standard curve by repeatedly measuring the standard solution use liquid with different specified concentrations.

[0181] The sheared filter paper coming out of the paper discharge funnel 68 of the shearing device 6 falls into the reaction tank a522 or the reaction tank b523, and the fifth liquid adding pump 85 pumps the hydrochloric acid in the hydrochloric acid reserve tank 73, and injects a certain amount of hydrochloric acid into the reaction tank a522 or the reaction tank b523 through the liquid adding pipe head 581. At the same time, the ultrasonic oscillator 552 starts the separation of fluoride. After the separation is completed, the sixth liquid adding pump 86 injects a certain amount of sodium hydroxide from the sodium hydroxide reserve tank 74 through the liquid adding pipe head 581, and the fourth liquid adding pump 84 injects a certain amount of buffer from the buffer reserve tank 72, and the second liquid adding pump 82 adds water to dilute to a specified concentration.

[0182] After starting the electromagnetic stirrer 554 and the thermostat, measurements are performed through the test electrode 561 to read data.

[0183] After the test electrode 561 is completed, it is inserted into the electrode protection tank 524, and is cleaned and blown dry by the blow-drying system 563 before the next use.

[0184] The actual working process of the present invention is as follows.

[0185] S1. Store the filter membrane clip in the membrane storage system 2.

[0186] The detachable side plate 226 can be directly opened, and the filter membrane clips can be stacked up and down in the film storage bin 22 in sequence. After the placement is completed, the detachable side plate 226 can be closed. The inserted filter membrane clips are arranged in order up and down in the film storage bin 22, and the filter membrane clip at the bottom is stored in the filter membrane clip discharge gap 225.

[0187] S2, the membrane clamp automatic pushing device 3 pushes the membrane clamp in the membrane storage system 2 into any station in the sampling device 4.

[0188] The controller controls the motor to operate, and the motor drives the driving gear 342 to rotate, and then drives the driven gear 343 and the first lead screw 341 to rotate, and then drives the nut and the push arm 33 fixed to the nut to move backward. The push arm 33 pushes the filter membrane clamp in the membrane storage bin 22 into the sampling device through the filter membrane clamp discharge gap 225. At this time, the push arm is out of the sensing area of ​​the position sensor 371, and the position sensor 371 no longer feeds back the position signal of the push arm to the controller, and the controller controls the push arm driving mechanism 34 to stop operating.

[0189] After placement is completed, the sampling device automatically seals and clamps the filter membrane clamp.

[0190] S3. Sampling and collecting fluoride in the ambient air through sampling equipment 4.

[0191] The controller controls the sampling pump to start, and the sampling pump performs suction operation. The air in the environment is sucked into the interior of the device from the sampling inlet pipe 421. The filter membrane support structure in the sampling inlet pipe 421 filters the inhaled air. The filtered air passes through the filter membrane clamp clamped in the detection membrane slot 441. The filter membrane in the filter membrane clamp absorbs the fluoride in the air, so that the sampling pump draws air to adsorb the sample in the air on the upper and lower filter membranes. The absorbed air enters the spring air duct 91 and then passes through the flow meter 47. The flow meter 47 counts and records the air flow and volume passing through.

[0192] At the same time, the blank test structure 43 provided in the present invention can effectively eliminate the possibility that the air in the environment automatically enters the sampling air inlet pipe 421 and affects the experimental results, and can effectively ensure the accuracy of the experimental results.

[0193] S4, the filter membrane clamp automatic pushing device 3 pushes the sampled filter membrane clamp into the shearing device 6.

[0194] After the sampling device completes the sampling of the filter membrane clip, the controller controls the push arm driving mechanism 34 to continue to operate, so that the push arm pushes the filter membrane clip in the sampling device into the shearing device, thereby shearing the filter membrane clip. When the filter membrane clip is pushed into the shearing device, the controller controls the push arm driving mechanism 34 to stop operating.

[0195] S5, the shearing device 6 cuts the filter membrane in the filter membrane holder after sampling into a circle, and crushes and shears the filter membrane into a specified size.

[0196] S51 , the filter membrane clamp automatic pushing device pushes the sampled filter membrane clamp into the filter membrane holding slot 651 of the membrane holding plate 65 .

[0197] S52, the controller controls the driving mechanism 64 to drive the pressing device 63, the circular cutter 62 and the push-out template 611 to move downward, and clamp and cut the filter membrane clamp. The controller controls the motor 641 to rotate, driving the pressing device 63, the circular cutter 62 and the push-out template 611 to move downward, and a filter membrane clamp holding position is formed between the bottom template 631 of the pressing device 63 and the filter membrane holding groove 651. At the same time, the circular cutter 62 cuts the filter membrane in the filter membrane clamp. The push-out template 611 is continuously controlled to move downward, and the push-out template 611 pushes the cut filter membrane through the circular leak hole to the paper feeding roller 661 of the paper feeding mechanism 66.

[0198] S53, the paper feeding drive motor 662 drives the paper feeding roller 661 to rotate, and the paper feeding roller 661 drives the cut filter membrane to be transported to the paper shredding mechanism 67 for shredding. The two rows of paper shredding knives 671 of the paper shredding mechanism 67 shred the filter membrane when they move relatively.

[0199] S54, the crushed filter membrane falls into the paper discharge funnel 68, and then falls into the reaction device from the paper discharge funnel 68 for extraction.

[0200] In step S54, the static electricity removal system 69 is configured to eliminate the static electricity generated by the crushed filter membrane during transportation, so that the crushed filter membrane can fall smoothly into the reaction device, ensuring the normal extraction of fluoride.

[0201] S6. The reaction device 5 measures the fluoride in the filter membrane.

[0202] S61, liquid preparation. The controller controls the liquid adding pumps in each liquid adding system 8 to prepare the standard stock solution into the standard use solution in the liquid preparation tank. The standard use solution prepared in the liquid preparation tank is transported to the reaction tank a522 or the reaction tank b523.

[0203] S62, extraction of fluoride. The filter membrane adsorbed with fluoride is sheared by the shearing device and falls into the reaction tank a522 or the reaction tank b523. Hydrochloric acid is added, and the ultrasonic oscillator 552 is turned on to separate the fluoride on the filter membrane.

[0204] S63, determination of fluoride. Start the thermostat 553 and the electromagnetic stirrer 554. The measuring electrode 561 is controlled to move out of the electrode protection tank 524 by the measuring electrode driving mechanism, and then the measuring electrode 561 is controlled to move to the top of the reaction tank, and then the measuring electrode 561 is controlled to move downward and into the reaction tank, and the measuring electrode 561 measures the solution in the reaction tank. The measuring electrode 561 feeds back the measurement result to the controller, and the controller analyzes the measurement result.

[0205] S7, the filter membrane clip automatic pushing device 3 pushes the discarded filter membrane clip into the waste filter membrane clip collecting bin 10 for collection.

Claims

1. Fluoride automatic analyzer, Features: The invention comprises a frame (1) and a controller for controlling the overall operation of the device; the frame (1) is provided with a membrane storage system (2) for storing filter membrane clips, a sampling device (4) for sampling the filter membrane corresponding to the discharge port of the membrane storage system (2), a shearing device (6) for shearing the sampled filter membrane corresponding to the discharge port of the sampling device (4), and a reaction device (5) for extracting and measuring fluoride in the sheared filter membrane, located below the shearing device (6); and a reaction device (5) for extracting and measuring fluoride in the sheared filter membrane is provided on the frame (1) located on the other side of the membrane storage system (2). The filter membrane clamp in the membrane storage system (2) is sequentially pushed step by step into the filter membrane clamp automatic pushing device (3) in the sampling device (4) and the shearing device (6); the controlled ends of the filter membrane clamp automatic pushing device (3), the sampling device (4), the shearing device (6) and the reaction device (5) are respectively connected to the output end of the controller; the frame is also provided with an air suction system (9) for assisting the sampling device (4) in sucking the sampling gas and a liquid storage system (7) for storing the reagent for the reaction device (5); the liquid storage system (7) is connected to the reaction device (5) through a liquid adding system; The sampling device (4) comprises a sampling box (41), wherein a movable clamp (44) is arranged in the sampling box (41), a sealing top plate (49) is arranged below the movable clamp (44) through a spring connection, and a detection membrane slot (441) is formed between the movable clamp (44) and the top of the inner wall of the sampling box (41) and between the movable clamp (44) and the sealing top plate (49), respectively, and the sealing top plate (49) is driven by a sealing drive mechanism (45) to move up and down, and the sealing drive mechanism (45) is arranged in the sampling box (41); a sampling structure (42) for performing environmental gas filtration sampling and a blank test structure (43) having the same structure as the sampling structure (42) and for performing a blank control test are arranged side by side at the top of the sampling box (41), and the detection membrane slot (441) comprises a detection membrane slot a connected to the sampling structure (42) and a detection membrane slot b connected to the blank test structure (43); The shearing device (6) comprises a shearing machine box (61), a membrane holding plate (65) is arranged in the shearing machine box (61), a pressing device (63) for pressing the filter membrane clamp into the membrane holding plate (65), a circular cutting knife (62) located inside the pressing device (63) for shearing the filter membrane clamp in the membrane holding plate (65), and a push plate (611) located inside the circular cutting knife (62), the pressing device (63), the circular cutting knife (62) and the push plate (611) are arranged in sequence directly above the membrane holding plate (65). The top end of the filter element (64) is driven to rise and fall by a driving mechanism (64), and a controlled end of the driving mechanism (64) is connected to an output end of a controller; a circular leak hole matching the circular cutting knife (62) is provided on the film holding plate (65); a shredder mechanism (67) for shredding the cut filter membrane is provided below the film holding plate (65), a discharge port for conveying the shredded filter membrane to the reaction device is provided at the bottom end of the shredder mechanism (67), and a controlled end of the shredder mechanism (67) is connected to an output end of the controller.

2. The fluoride automatic measuring instrument according to claim 1, Features: A waste filter membrane clip collection bin (10) for collecting waste filter membrane clips after shearing is also provided on the frame (1) located on one side of the shearing device (6), and the filter membrane clip automatic pushing device (3) is capable of pushing the waste filter membrane clips after shearing into the waste filter membrane clip collection bin (10).

3. The fluoride automatic measuring instrument according to claim 1, Features: The filter membrane clamp automatic pushing device (3) comprises a horizontal support platform (31) positioned on the frame (1) and a movable frame (32) arranged above the horizontal support platform (31); the membrane storage system (2) is positioned on the movable frame (32); a filter membrane clamp discharge gap (225) extending from front to back is formed between the bottom end of the membrane storage system (2) and the top end of the movable frame (32); a push arm (33) corresponding to the filter membrane clamp discharge gap (225) is arranged in the movable frame (32) through a push arm driving mechanism (34); and a controlled end of the push arm driving mechanism (34) is connected to an output end of a controller.

4. The automatic fluoride analyzer according to claim 3, Features: A lateral moving mechanism (35) is provided between the horizontal support platform (31) and the movable frame (32) for driving the movable frame (32), the film storage system (2) and the push arm (33) to move left and right, and a controlled end of the lateral moving mechanism (35) is connected to an output end of a controller.

5. The automatic fluoride analyzer according to claim 1, Features: A paper feeding mechanism (66) for transferring the cut filter membrane to the inside of the paper shredding mechanism (67) is also provided directly below the circular leak hole of the film holding plate (65), and the controlled end of the paper feeding mechanism (66) is connected to the output end of the controller.

6. The automatic fluoride analyzer according to claim 1, Features: The reaction device (5) comprises a reaction box (51), on which a reaction system (55) is arranged that can add liquid through a liquid adding system (8) and extract fluoride in the filter membrane, and a measuring system (56) that can be inserted into the reaction system (55) to measure fluoride is also arranged above the reaction box (51), the controlled end of the reaction system (55) is connected to the output end of the controller, and the measuring system (56) is interactively connected to the controller.

7. The automatic fluoride analyzer according to claim 6, Features: The reaction system (55) comprises a reaction tank (52) arranged on the top surface of a reaction machine box (51) and a liquid preparation tank (521) capable of conveying the prepared reaction liquid into the reaction tank (52); a bottom valve (59) and a bottom valve driving mechanism (54) for driving the bottom valve (59) to rise and fall to realize whether to discharge the liquid are arranged at the bottom ends of the reaction tank (52) and the liquid preparation tank (521); a liquid collecting bag (53) for containing and discharging residual liquid is arranged below the reaction tank (52) and the liquid preparation tank (521); an ultrasonic separation mechanism for separating fluoride from the solution after adding the filter membrane is arranged on the reaction tank (52); and a controlled end of the ultrasonic separation mechanism is connected to the output end of the controller.

8. The automatic fluoride analyzer according to claim 7, Features: The ultrasonic separation mechanism comprises an ultrasonic oscillator (552) arranged on the outer wall of the reaction tank (52) and an electromagnetic stirrer (554) arranged in the reaction tank (52), and the controlled ends of the ultrasonic oscillator (552) and the electromagnetic stirrer (554) are respectively connected to the output end of the controller; A thermostat (553) is also provided on the outer wall of the reaction tank (52), and a controlled end of the thermostat (553) is connected to an output end of the controller.

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