阅读说明：本技术 一种化学分析装置及化学分析方法 (Chemical analysis device and chemical analysis method ) 是由 雷超 孙娜波 吴慧珍 于 2021-08-21 设计创作，主要内容包括：本发明涉及化学分析技术领域,公开了一种化学分析装置及化学分析方法,包括底板,所述底板的上表面固接有放置架,所述底板的上表面固接有支撑架和投射板,所述支撑架的内侧面固接有pH色度盘,所述支撑架内部转动连接有透明板转轴,所述透明板转轴的外表面固接有微调从动齿轮,所述透明板转轴的末端固接有折射透明板,所述底板的内部开设有安装槽,所述安装槽的内部活动连接有微调转轴,所述微调转轴的侧表面固接有微调主动齿轮,所述微调转轴的末端固接有转柄,所述放置架的上方设置有pH试纸盒,本发明实现在滴液时,可避免溶液溅出滴落到皮肤表面,对操作者进行保护,且使得取换pH试纸能够同步进行,让pH试纸一直处在待取出的状态。(The invention relates to the technical field of chemical analysis, and discloses a chemical analysis device and a chemical analysis method, which comprise a bottom plate, wherein the upper surface of the bottom plate is fixedly connected with a placing frame, the upper surface of the bottom plate is fixedly connected with a supporting frame and a projection plate, the inner side surface of the supporting frame is fixedly connected with a pH chromaticity disk, the inside of the supporting frame is rotatably connected with a transparent plate rotating shaft, the outer surface of the transparent plate rotating shaft is fixedly connected with a fine adjustment driven gear, the tail end of the transparent plate rotating shaft is fixedly connected with a refraction transparent plate, the inside of the bottom plate is provided with a mounting groove, the inside of the mounting groove is movably connected with a fine adjustment rotating shaft, the side surface of the fine adjustment rotating shaft is fixedly connected with a fine adjustment driving gear, the tail end of the fine adjustment rotating shaft is fixedly connected with a rotating handle, and a pH test paper box is arranged above the placing frame. And the pH test paper can be synchronously taken out and replaced, so that the pH test paper is always in a state of waiting for taking out.)

1. A chemical analysis device comprises a bottom plate (1), wherein the upper surface of the bottom plate (1) is fixedly connected with a placing rack (12), and the chemical analysis device is characterized in that the upper surface of the bottom plate (1) is fixedly connected with a support frame (6) and a projection plate (8), the inner side surface of the support frame (6) is fixedly connected with a pH color dial (10), the inside of the support frame (6) is rotatably connected with a transparent plate rotating shaft (7), the outer surface of the transparent plate rotating shaft (7) is fixedly connected with a fine adjustment driven gear (11), the tail end of the transparent plate rotating shaft (7) is fixedly connected with a refraction transparent plate (9), a mounting groove (4) is formed in the bottom plate (1), a fine adjustment rotating shaft (2) is movably connected in the mounting groove (4), the tail end of the fine adjustment rotating shaft (2) penetrates through the mounting groove (4) and extends to the outer side of the bottom plate (1), a fine adjustment driving gear (3) is fixedly connected to the side surface of the fine adjustment rotating shaft (2), a rotating handle (5) is fixedly connected to the tail end of the fine adjustment rotating shaft (2), an incandescent lamp (13) is arranged inside the placing rack (12), a sliding rod (14) is fixedly connected to the surface of the placing rack (12), and a pH test paper box (15) is arranged above the placing rack (12);

the inner side of the pH test paper box (15) is provided with a sliding chute (17), the sliding chute (17) is connected with the sliding rod (14) in a vertical sliding manner, the pH test paper placing bin (18), a waste test paper collecting bin (19) and a rotating shaft slot (25) are arranged in the pH test paper box (15), the front surfaces of the pH test paper placing bin (18) and the waste test paper collecting bin (19) are respectively provided with a pH test paper box front door (16), a dropping hole (20) is arranged above the pH test paper box (15), the middle part of the pH test paper box (15) is fixedly connected with a glass plate (21), a pH test paper fixing groove (22) is formed between the pH test paper box (15) and the glass plate (21), the pH test paper placing bin (18), the pH test paper fixing groove (22) and the waste test paper collecting bin (19) are communicated with each other, a gland movable lower pressing hole (23) and a fillet gear lower pressing hole (24) are arranged in the pH test paper box (15), and press cap activity hole (23) with round angle gear pushes down hole (24) and makes respectively pivot groove (25) with pH test paper fixed slot (22) are linked together, the inside swing joint of pivot groove (25) has a set wheel pivot (26), the surface rigid coupling of set wheel pivot (26) has set wheel (30), and the left end of set wheel (30) runs through pivot groove (25) and extend to the outside of pH test paper box (15), the inside of pH test paper box (15) is provided with test paper push mechanism (27), test paper push mechanism (28) and test paper fixed component (29).

2. A chemical analysis device according to claim 1, wherein said fine actuator gear (3) and said fine actuator gear (11) are engaged with each other, and said fine actuator gear (11) is provided with engaging teeth at 1/4 of its circumference.

3. The chemical analysis device according to claim 1, wherein the test paper pushing mechanism (27) comprises a first driving belt (271), a paper changing wheel (272), a paper wheel shaft (273), a silica gel layer (274), a second driving belt (275), a paper pressing fillet wheel (276) and a fillet gear shaft (277), the paper wheel shaft (273) and the fillet gear shaft (277) are movably connected inside the rotating shaft slot (25), the circular diameters of the disc wheel rotating shaft (26), the paper wheel shaft (273) and the fillet gear shaft (277) are equal, the first driving belt (271) is wound on the surfaces of the disc wheel rotating shaft (26) and the paper wheel shaft (273), the second driving belt (275) is wound on the surfaces of the paper wheel shaft (273) and the fillet gear shaft (277), and the paper changing wheel (272) is fixedly connected to the side surface of the paper wheel shaft (273), the circumference surface rigid coupling of paper changing wheel (272) has silica gel layer (274), the lower extreme of silica gel layer (274) extends to the inside in storehouse (18) is placed to the pH test paper, the side surface rigid coupling of fillet gear axle (277) has press paper fillet wheel (276), just press paper fillet wheel (276) to run through fillet gear pushes down hole (24) and extends to the inside of pH test paper fixed slot (22).

4. A chemical analysis device according to claim 3, wherein the perimeter of the outer surface of the silica gel layer (274) is equal to the length of the pH strip stored in the pH strip storage compartment (18).

5. The chemical analysis device according to claim 1, wherein the test paper push-up mechanism (28) comprises a push-up plate (281), a third transmission belt (282), a fourth transmission belt (283), a double-track wheel shaft (284), a push-up gear (285), a push-up gear shaft (286), a fourth transmission belt driven wheel (287) and a toothed bar (288), the double-track wheel shaft (284) is movably connected inside the rotating shaft slot (25), the third transmission belt (282) is wound on the surfaces of the disk wheel rotating shaft (26) and the double-track wheel shaft (284), the diameters of the circular surfaces of the double-track wheel shaft (284) and the disk wheel rotating shaft (26) are equal, the push-up gear shaft (286) is movably connected to the inner wall of the pH test paper placing bin (18), and the push-up gear (285) and the fourth transmission belt driven wheel (287) are fixedly connected to the surface of the push-up gear shaft (286), the surfaces of the double-track wheel shaft (284) and the fourth driving belt driven wheel (287) are wound with the fourth driving belt (283), the toothed bar (288) is connected inside the pH test paper placing bin (18) in a sliding manner, and the top end of the toothed bar (288) is fixedly connected with the upper push plate (281).

6. A chemical analysis device according to claim 5, wherein the push-up gear (285) is engaged with the toothed bar (288), the diameter of the circular surface of the double-track wheel shaft (284) is smaller than that of the fourth belt driven wheel (287), and the push-up plate (281) moves for a distance equal to the thickness of one pH indicator paper while the double-track wheel shaft (284) rotates one turn.

7. The chemical analysis device of claim 3, wherein the test paper fixing component (29) comprises a first fixing shaft (291), a cross bar (292), a pressing cap (293), a connecting block (294) and a second fixing shaft (295), the first fixing shaft (291) is fixedly connected to the front surface of the paper changing wheel (272), the second fixing shaft (295) is fixedly connected to the front surface of the paper pressing circular-angle wheel (276), the cross bar (292) is movably sleeved on the outer surfaces of the first fixing shaft (291) and the second fixing shaft (295), the connecting block (294) is fixedly connected to the lower surface of the cross bar (292), and the pressing cap (293) is fixedly connected to the lower surface of the connecting block (294).

8. A chemical analysis apparatus as claimed in claim 7, wherein the press cap (293) and the connecting block (294) extend through the press cap movable hole (23) and into the inside of the pH paper fixing groove (22).

9. A chemical analysis method using the apparatus according to any one of claims 1 to 8, comprising the steps of:

A. firstly, a front door (16) of a pH test paper box is opened, the pH test paper is placed in a pH test paper placing bin (18), the front door (16) of the pH test paper box is closed, then the pH test paper is selected, a hand wheel (30) is pulled, a paper changing wheel (272) rotates along with a first transmission belt (271), a cross rod (292) also rotates along with the paper changing wheel (272), after the pH test paper is rolled into a pH test paper fixing groove (22) by a silica gel layer (274), and after the pH test paper is completely placed in the pH test paper fixing groove (22), a pressing cap (293) presses and fixes the left end of the pH test paper, the fillet end of a pressing circular angle wheel (276) fixes the right end of the pH test paper, and in the process of rolling out the pH test paper by the silica gel layer (274), because the hand wheel (30) rotates all the time, a double-rail wheel shaft (284) positioned below the hand wheel (30) rotates along with the hand wheel (30), and a fourth transmission belt (283) presses a fourth driven wheel (287), because the push-up gear (285) and the fourth driving belt driven wheel (287) are fixedly connected to the surface of the push-up gear shaft (286), the push-up gear (285) also rotates, the toothed rod (288) is moved upwards at the same time, the push-up plate (281) is pushed to move upwards, and therefore the rest of pH test paper is pushed upwards, and finally, paper pushing, paper taking and paper fixing are carried out synchronously;

B. after the solution to be detected is absorbed by a dropper, the bottom end of the dropper is inserted into the inner part of the drip hole (20), then the solution is dripped on the surface of the pH test paper, and the solution and the pH test paper are waited for color reaction;

C. the pH test paper box (15) is fixed at the front end of the placing rack (12) through the sliding connection of the sliding chute (17) and the sliding rod (14), the incandescent lamp (13) is started, and the characteristic that the incandescent lamp (13) generates heat is used as a heat source to dry the pH test paper;

D. adjusting the refraction transparent plate (9) to an initial position to enable the front surface of the refraction transparent plate (9) to correspond to the initial color and the pH value on the pH color disc (10);

E. observing whether the projection plate (8) has colored light beams or not, rotating the rotating handle (5) to enable the fine adjustment driven gear (11) to rotate slowly, adjusting the fine adjustment driven gear (11) to enable the refraction transparent plate (9) to rotate, stopping rotating when the light is just totally reflected after the light is rotated to a certain angle, and observing the position on the pH color disc (10) corresponding to the front surface of the refraction transparent plate (9);

F. the corresponding reading on the pH scale (10) is read, and the pH value of the solution is obtained.

Technical Field

The invention relates to the technical field of chemical analysis, in particular to a chemical analysis device and a chemical analysis method.

Background

Chemical analysis refers to a method of determining chemical components or compositions of substances by performing analysis based on chemical reactions of the substances. Chemical analysis is widely applied, and chemical analysis is required to be applied to industrial raw materials, semi-products and finished products, agricultural soil, fertilizers, feeds, transportation fuels, lubricants and the like in the processes of research, trial production, production or use, and common chemical analysis methods comprise an optical analysis method, an electrochemical analysis method and a chromatographic analysis method.

In a laboratory, various solutions need to be chemically analyzed, wherein the acidity and alkalinity of the solutions are often chemically analyzed, pH test paper detection and analysis is commonly used in the acidity and alkalinity detection and analysis of the solutions, a dropper is used for sucking the solution to be detected and analyzed to be dropped on the pH test paper, the pH test paper is compared with a color chart after being dried, then the solutions are analyzed according to the acidity and alkalinity of the solutions, and the concentration of acid and alkali in the solutions is determined.

However, in the existing dropping liquid detection, the test paper needs to be pinched by hands or placed on a glass plate for titration, and the dropping liquid may drip or splash on the skin in the titration process, so that the skin is burned, and certain danger is caused. Accordingly, one skilled in the art provides a chemical analysis apparatus and a chemical analysis method to solve the problems of the background art.

Disclosure of Invention

The present invention is directed to a chemical analysis apparatus and a chemical analysis method, which solve the problems set forth in the background art.

In order to achieve the purpose, the invention provides the following technical scheme:

a chemical analysis device comprises a bottom plate, wherein the upper surface of the bottom plate is fixedly connected with a placing frame, the upper surface of the bottom plate is fixedly connected with a supporting frame and a projection plate, the inner side surface of the supporting frame is fixedly connected with a pH chromaticity disk, the inside of the supporting frame is rotatably connected with a transparent plate rotating shaft, the outer surface of the transparent plate rotating shaft is fixedly connected with a fine-tuning driven gear, the tail end of the transparent plate rotating shaft is fixedly connected with a refraction transparent plate, the bottom plate is internally provided with a mounting groove, the mounting groove is internally and movably connected with a fine tuning rotating shaft, the tail end of the fine tuning rotating shaft penetrates through the mounting groove and extends to the outer side of the bottom plate, a fine tuning driving gear is fixedly connected to the side surface of the fine tuning rotating shaft, the tail end of the fine adjustment rotating shaft is fixedly connected with a rotating handle, an incandescent lamp is arranged inside the placing rack, a sliding rod is fixedly connected to the surface of the placing rack, and a pH test paper box is arranged above the placing rack;

the inner side of the pH test paper box is provided with a chute, the chute is connected with the slide bar in a vertical sliding manner, the pH test paper box is internally provided with a pH test paper placing bin, a waste test paper collecting bin and a rotating shaft slot, the front surfaces of the pH test paper placing bin and the waste test paper collecting bin are respectively provided with a pH test paper box front door, a drip hole is arranged above the pH test paper box, the middle part of the pH test paper box is fixedly connected with a glass plate, a pH test paper fixing slot is formed between the pH test paper box and the glass plate, the pH test paper placing bin, the pH test paper fixing slot and the waste test paper collecting bin are communicated with each other, the pH test paper box is internally provided with a press cap movable hole and a fillet gear press hole, the press cap movable hole and the fillet gear press hole are respectively communicated with the rotating shaft slot and the pH test paper fixing slot, and the rotating shaft slot is movably connected with a disc wheel rotating shaft, the outer surface of the disc wheel rotating shaft is fixedly connected with a hand disc wheel, the left end of the hand disc wheel penetrates through the rotating shaft groove and extends to the outside of the pH test paper box, and a test paper pushing mechanism, a test paper pushing mechanism and a test paper fixing assembly are arranged inside the pH test paper box.

As a still further scheme of the invention: the fine setting driving gear with fine setting driven gear intermeshing connects, just fine setting driven gear circumference's 1/4 is provided with the meshing tooth.

As a still further scheme of the invention: the test paper pushing mechanism comprises a first transmission belt, a paper changing wheel, a paper wheel shaft, a silica gel layer, a second transmission belt, a paper pressing fillet wheel and a fillet gear shaft, the paper wheel shaft and the fillet gear shaft are movably connected inside the rotating shaft groove, the diameters of the round surfaces of the disc wheel rotating shaft, the paper wheel shaft and the fillet gear shaft are equal, the first transmission belt is wound on the surfaces of the disc wheel rotating shaft and the paper wheel shaft, the surfaces of the paper wheel shaft and the fillet gear shaft are wound with the second transmission belt, the side surface of the paper wheel shaft is fixedly connected with the paper changing wheel, the circumferential surface of the paper changing wheel is fixedly connected with the silica gel layer, the lower end of the silica gel layer extends into the pH test paper placing bin, the side surface of the circular gear shaft is fixedly connected with the paper pressing circular angle wheel, and the paper pressing circular horn wheel penetrates through the circular horn gear pressing hole and extends to the inside of the pH test paper fixing groove.

As a still further scheme of the invention: the perimeter of the outer surface of the silica gel layer is equal to the length of the pH test paper stored in the pH test paper storage bin.

As a still further scheme of the invention: the test paper push-up mechanism comprises a push-up plate, a third transmission belt, a fourth transmission belt, a double-track wheel shaft, a push-up gear shaft, a fourth transmission belt driven wheel and a toothed bar, wherein the double-track wheel shaft is movably connected inside the rotating shaft groove, the third transmission belt is wound on the surfaces of the disc wheel rotating shaft and the double-track wheel shaft, the diameters of circular surfaces of the double-track wheel shaft and the disc wheel rotating shaft are equal, the push-up gear shaft is movably connected to the inner wall of the pH test paper placing bin, the push-up gear and the fourth transmission belt driven wheel are fixedly connected to the surface of the push-up gear shaft, the fourth transmission belt is wound on the surfaces of the double-track wheel shaft and the fourth transmission belt driven wheel, the toothed bar is slidably connected inside the pH test paper placing bin, and the top end of the toothed bar is fixedly connected with the push-up plate.

As a still further scheme of the invention: the push-up gear is meshed with the toothed bar, the diameter of the circular surface of the double-track wheel shaft is smaller than that of the fourth driving belt driven wheel, and the double-track wheel shaft rotates for one circle when the distance moved by the push-up plate is equal to the thickness of one pH test paper.

As a still further scheme of the invention: the test paper fixing component comprises a first fixing shaft, a cross rod, a pressing cap, a connecting block and a second fixing shaft, the first fixing shaft is fixedly connected with the front surface of the paper changing wheel, the second fixing shaft is fixedly connected with the front surface of the paper pressing circular angle wheel, the first fixing shaft and the outer surface of the second fixing shaft are movably sleeved with the cross rod, the lower surface of the cross rod is fixedly connected with the connecting block, and the lower surface of the connecting block is fixed with the pressing cap.

As a still further scheme of the invention: the pressing cap and the connecting block penetrate through the pressing cap movable hole and extend to the inside of the pH test paper fixing groove.

A chemical analysis method comprising the steps of:

A. firstly, a front door of a pH test paper box is opened to place pH test paper into a pH test paper placing bin, the front door of the pH test paper box is closed, then pH test paper is selected and stirred, a hand wheel is stirred, a paper changing wheel rotates along with a first transmission belt, a cross bar rotates along with the paper changing wheel, when a silica gel layer rolls the pH test paper into a pH test paper fixing groove and the pH test paper is completely placed in the pH test paper fixing groove, a pressing cap presses and fixes the left end of the pH test paper, the fillet end of a paper pressing fillet wheel presses and fixes the right end of the pH test paper, and in the process of rolling out the pH test paper from the silica gel layer, as the hand wheel rotates all the time, a double-track wheel shaft positioned below the hand wheel rotates along with the hand wheel, and a fourth transmission belt driven wheel linked with the double-track wheel shaft through a fourth transmission belt also rotates, and as the push-up gear and the fourth transmission belt driven wheel are fixedly connected on the surface of the push-up gear shaft, the push-up gear also rotates, meanwhile, the rack rod is moved upwards to push the upper push plate to move upwards, so that the rest pH test paper is pushed upwards, and finally, paper pushing, paper taking and paper fixing are carried out synchronously;

B. after the solution to be detected is absorbed by a dropper, the bottom end of the dropper is inserted into the inner part of the drip hole, then the solution is dripped on the surface of pH test paper, and the solution and the pH test paper are waited for color reaction;

C. the pH test paper box is fixed at the front end of the placing rack through the sliding connection of the sliding chute and the sliding rod, the incandescent lamp is started, the characteristic of heating of the incandescent lamp is used as a heat source, and the pH test paper is dried;

D. adjusting the refraction transparent plate to an initial position to enable the front surface of the refraction transparent plate to correspond to the initial color and the pH value on the pH chromaticity disk;

E. observing whether the projection plate has colored light beams or not, rotating the rotating handle to enable the fine-tuning driven gear to rotate slowly, adjusting the fine-tuning driven gear to enable the refraction transparent plate to rotate, stopping rotating when the light is just totally reflected after the light is rotated to a certain angle, and observing the position on the pH chromaticity disk corresponding to the front surface of the refraction transparent plate;

F. the corresponding reading on the pH color scale is read, and the pH value of the solution is obtained.

Compared with the prior art, the invention has the beneficial effects that:

1. through placing the pH test paper in the pH test paper box, can avoid the pH test paper to leave in the air and wet, and then influence the possibility that detects the structure, and through test paper push mechanism and test paper push-up mechanism in the pH test paper box, can change the test paper fast, and let the pH test paper be in the state of treating taking out always, can push away the circulation operation of paper and trade paper fast, and when carrying out the dropping liquid, utilize the pore wall in dropping liquid hole to block, can avoid the solution that awaits measuring spill drippage to the skin surface, cause the skin burn, utilize useless test paper to receive the box simultaneously, can collect the used test paper in unison, avoid useless test paper to lose indiscriminately and influence environment and personal safety.

2. The 1/4 on the circumference of the fine adjustment driven gear is provided with meshing teeth, because the refraction angles of various colored lights are all between 0 and 90 degrees, the rotating angle of the fine adjustment driven gear only needs to be less than 90 degrees.

3. The paper wheel is driven to rotate through rotating the hand disc wheel, a silica gel layer is arranged on the surface of the paper wheel, the friction force between the silica gel layer and the pH test paper is increased, the pH test paper can be rolled into a pH test paper fixing groove to be placed, the paper taking process is free of using a sheet to tear, the test paper is prevented from contacting with the external environment for a long time, and the influence of moisture in the air can not be received, so that the accuracy of a detection result is improved.

4. Set up a set wheel pivot, the paper wheel axle, the disc diameter of fillet gear axle and double track shaft equals, and the surface girth on silica gel layer equals with the length of pH test paper, after the pH test paper is removed the pH test paper fixed slot completely, it rotates the round to trade the paper wheel, a set wheel pivot, the paper wheel axle, fillet gear axle and double track shaft all rotate the round, guarantee in the push-up mechanism of setting when the double track shaft rotates the round, go up the thickness that the push pedal only removed a pH test paper, can guarantee at the in-process of getting paper, remaining test paper can evenly shift up, rotate the hand wheel and just can reach and get paper and push away the paper effect, make two kinds of actions of paper of getting and pushing away paper go on just incessant linkage simultaneously.

5. Set up fixed test paper subassembly, after the pH test paper is impeld the pH test paper fixed slot, follow at the horizontal pole and trade paper wheel rotation a week back, the left end that the pressure cap that is located the horizontal pole below can be pressed the test paper is lived, and the right-hand member of pH test paper can be pushed down by the fillet end of pressing paper fillet wheel to the both ends of pH test paper will all be fixed, and the follow-up dropping liquid in-process pH test paper of being convenient for can not the fold, influences the light transmissivity of follow-up illumination in-process.

Drawings

FIG. 1 is a schematic structural view of a chemical analysis apparatus and a chemical analysis method;

FIG. 2 is a top view of a chemical analysis apparatus and a chemical analysis method;

FIG. 3 is a schematic diagram of a pH test paper box in a chemical analysis apparatus and a chemical analysis method

FIG. 4 is a schematic view showing the internal structure of a pH test paper cassette in a chemical analysis apparatus and a chemical analysis method;

FIG. 5 is a schematic structural diagram of a replacement mechanism, a push-up mechanism and a test paper fixing assembly in a chemical analysis apparatus and a chemical analysis method;

fig. 6 is a plan view of a replacement mechanism and a fixed strip unit in a chemical analysis apparatus and a chemical analysis method.

In the figure: 1. a base plate; 2. finely adjusting the rotating shaft; 3. finely adjusting the driving gear; 4. mounting grooves; 5. a handle is rotated; 6. a support frame; 7. a transparent plate rotating shaft; 8. a projection plate; 9. a refractive transparent plate; 10. a pH color scale; 11. finely adjusting the driven gear; 12. placing a rack; 13. an incandescent lamp; 14. a slide bar; 15. a pH test paper box; 16. a front door of the pH test paper box; 17. a chute; 18. placing a pH test paper in a bin; 19. a waste test paper collecting bin; 20. a drip hole; 21. a glass plate; 22. fixing a pH test paper groove; 23. pressing a cap movable hole; 24. pressing the hole by the fillet gear; 25. a rotating shaft groove; 26. a disk wheel spindle; 27. a test paper pushing mechanism; 271. a first drive belt; 272. paper changing wheels; 273. a paper wheel axle; 274. a silica gel layer; 275. a second belt; 276. pressing a paper fillet wheel; 277. a rounded gear shaft; 28. the test paper pushing mechanism; 281. a push plate is arranged; 282. a third belt; 283. a fourth belt; 284. a double-track wheel axle; 285. pushing up the gear; 286. pushing up a gear shaft; 287. a fourth driving belt driven wheel; 288. a rack bar; 29. the test paper fixing component; 291. a first fixed shaft; 292. a cross bar; 293. pressing the cap; 294. connecting blocks; 295. a second fixed shaft; 30. a handwheel wheel.

Detailed Description

Referring to fig. 1 to 6, in an embodiment of the present invention, a chemical analysis apparatus includes a base plate 1, a placing frame 12 is fixedly connected to an upper surface of the base plate 1, and is characterized in that a supporting frame 6 and a projection plate 8 are fixedly connected to the upper surface of the base plate 1, a pH color disc 10 is fixedly connected to an inner side surface of the supporting frame 6, a transparent plate rotating shaft 7 is rotatably connected to an inner side of the supporting frame 6, a fine tuning driven gear 11 is fixedly connected to an outer surface of the transparent plate rotating shaft 7, a refractive transparent plate 9 is fixedly connected to a terminal end of the transparent plate rotating shaft 7, a mounting groove 4 is formed in the base plate 1, a fine tuning rotating shaft 2 is movably connected to an inner side of the mounting groove 4, a terminal end of the fine tuning rotating shaft 2 penetrates through the mounting groove 4 and extends to an outer side of the base plate 1, a fine tuning driving gear 3 is fixedly connected to a side surface of the fine tuning rotating shaft 2, a rotating handle 5 is fixedly connected to a filament lamp 13 is disposed in the placing frame 12, and a sliding rod 14 is fixedly connected to a surface of the placing frame 12, a pH test paper box 15 is arranged above the placing rack 12; the inner side of the pH test paper box 15 is provided with a sliding chute 17, the sliding chute 17 is connected with the sliding rod 14 in an up-and-down sliding manner, the pH test paper box 15 is internally provided with a pH test paper placing bin 18, a waste test paper collecting bin 19 and a rotating shaft slot 25, the front surfaces of the pH test paper placing bin 18 and the waste test paper collecting bin 19 are respectively provided with a pH test paper box front door 16, a drip hole 20 is formed above the pH test paper box 15, the middle part of the pH test paper box 15 is fixedly connected with a glass plate 21, a pH test paper fixing slot 22 is formed between the pH test paper box 15 and the glass plate 21, the pH test paper placing bin 18, the pH test paper fixing slot 22 and the waste test paper collecting bin 19 are communicated with each other, the pH test paper box 15 is internally provided with a press cap movable hole 23 and a fillet gear lower pressing hole 24, the press cap movable hole 23 and the fillet gear lower pressing hole 24 respectively communicate the rotating shaft slot 25 with the pH test paper fixing slot 22, the rotating shaft slot 25 is movably connected with a plate wheel rotating shaft 26, the outer surface of the disc wheel rotating shaft 26 is fixedly connected with a disc wheel 30, the left end of the disc wheel 30 penetrates through the rotating shaft groove 25 and extends to the outside of the pH test paper box 15, the fine adjustment driving gear 3 and the fine adjustment driven gear 11 are meshed and connected with each other, 1/4 on the circumference of the fine adjustment driven gear 11 is provided with meshing teeth, because the refraction angles of various colored lights are all located at 0-90 degrees, the rotation angle of the fine adjustment driven gear 11 only needs to be less than 90 degrees, because the color of an object is determined by the colored light reflected by the object, but each person has difference in color identification, especially two similar chromaticities, and part of people are difficult to distinguish, when the pH value of the solution is chemically analyzed, the color tested by using the pH test paper is sometimes difficult to distinguish the color, so that the pH value of the solution is deviated, the subsequent chemical analysis process is influenced, and the refraction index of the colored light is fixed, set up refraction transparent plate 9, utilize the rotation of refraction transparent plate 9 to adjust the incident angle of light, the colour of light itself is judged according to the refracting index difference of the chromatic light of difference to the pH value of solution is obtained.

In fig. 4 and 5: the inside of the pH test paper box 15 is provided with a test paper pushing mechanism 27, the test paper pushing mechanism 27 comprises a first driving belt 271, a paper changing wheel 272, a paper wheel shaft 273, a silica gel layer 274, a second driving belt 275, a paper pressing circular angle wheel 276 and a circular angle gear shaft 277, the paper wheel shaft 273 and the circular angle gear shaft 277 are movably connected inside the rotating shaft groove 25, the diameters of the circular surfaces of the disc wheel rotating shaft 26, the paper wheel shaft 273 and the circular angle gear shaft 277 are equal, the first driving belt 271 is wound on the surfaces of the disc wheel rotating shaft 26 and the paper wheel shaft 273, the second driving belt 275 is wound on the surfaces of the paper wheel shaft 273 and the circular angle gear shaft 277, the paper changing wheel 272 is fixedly connected on the side surface of the paper wheel shaft 273, the silica gel layer 274 is fixedly connected on the circumferential surface of the paper changing wheel 272, the lower end of the silica gel layer 274 extends to the inside of the pH test paper placing bin 18, the paper pressing circular angle wheel 276 is fixedly connected on the side surface of the circular angle gear shaft 277, and the paper pressing circular angle wheel 276 penetrates through the circular angle gear pressing hole 24 and extends to the inside of the pH test paper fixing groove 22, the length of the outer surface perimeter of the silica gel layer 274 and the pH test paper stored in the pH test paper storage bin 18 is equal, the hand wheel 30 is rotated to drive the paper changing wheel 272 to rotate, the silica gel layer 274 is arranged on the surface of the paper changing wheel 272, the friction force between the pH test paper and the pH test paper is increased, the pH test paper can be rolled into the pH test paper fixing groove 22 to be stored, the paper taking process is carried out, a sheet is not needed to be torn down for use, the pH test paper is not in contact with the external environment for a long time, the influence of moisture in the air can not be received, and the accuracy of a detection result is improved.

In fig. 4: the inside of the pH test paper box 15 is provided with a test paper push-up mechanism 28, the test paper push-up mechanism 28 comprises a push-up plate 281, a third transmission belt 282, a fourth transmission belt 283, a double-track wheel shaft 284, a push-up gear 285, a push-up gear shaft 286, a fourth transmission belt driven wheel 287 and a toothed bar 288, the double-track wheel shaft 284 is movably connected inside the rotating shaft slot 25, the third transmission belt 282 is wound on the surfaces of the disk wheel rotating shaft 26 and the double-track wheel shaft 284, the diameters of the circular surfaces of the double-track wheel shaft 284 and the disk wheel rotating shaft 26 are equal, the inner wall of the pH test paper placing bin 18 is movably connected with the push-up gear shaft 286, the push-up gear 285 and the fourth transmission belt driven wheel 287 are fixedly connected on the surface of the disk wheel rotating shaft 26, the toothed bar 288 is slidably connected inside the pH test paper placing bin 18, the top end of the toothed bar 288 is fixedly connected with the push-up plate 281, the push-up gear 285 is engaged with the toothed bar 288, the diameter of the circular surface of the double-track wheel shaft 284 is smaller than that of the fourth driving belt driven wheel 287, when the moving distance of the upper push plate 281 is equal to the thickness of one pH test paper, the double-track wheel shaft 284 rotates by one circle, the upper push plate 281 only moves by the thickness of one pH test paper in the push-up mechanism 28, so that the remaining pH test paper can uniformly move upwards in the paper taking process, the paper taking and pushing effects can be achieved by only rotating the hand wheel 30, and the two actions of paper taking and paper pushing can be simultaneously and continuously carried out in a linkage manner.

In fig. 4 and 5: the test paper fixing component 29 is arranged in the pH test paper box 15, the test paper fixing component 29 comprises a first fixing shaft 291, a cross rod 292, a pressing cap 293, a connecting block 294 and a second fixing shaft 295, the first fixing shaft 291 is fixedly connected to the front surface of the paper changing wheel 272, the second fixing shaft 295 is fixedly connected to the front surface of the paper pressing circular-angle wheel 276, the cross rod 292 is movably sleeved on the outer surfaces of the first fixing shaft 291 and the second fixing shaft 295, the connecting block 294 is fixedly connected to the lower surface of the cross rod 292, the pressing cap 293 is fixedly arranged on the lower surface of the connecting block 294, and the pressing cap 293 and the connecting block 294 penetrate through the pressing cap movable hole 23 and extend into the pH test paper fixing groove 22, so that two ends of the pH test paper are fixed, the pH test paper cannot be folded in a subsequent dropping process, and light transmittance in a subsequent lighting process is affected.

The chemical analysis method comprises the following steps:

A. firstly, a front door 16 of a pH test paper box is opened, pH test paper is put into a pH test paper placing bin 18, the front door 16 of the pH test paper box is closed, then the hand wheel 30 is shifted by selecting the pH test paper, the paper changing wheel 272 rotates along with the first transmission belt 271, at the same time, a cross bar 292 also rotates along with the paper changing wheel 272, when the silica gel layer 274 rolls the pH test paper into a pH test paper fixing groove 22, and when the pH test paper is completely placed in the pH test paper fixing groove 22, a pressing cap 293 presses and fixes the left end of the pH test paper, the rounded end of a paper pressing round-angle wheel 276 presses and fixes the right end of the pH test paper, and in the process of rolling out the pH test paper from the silica gel layer 274, because the hand wheel 30 rotates all the time, a double-track wheel shaft 284 positioned below the hand wheel 30 rotates along with the hand wheel 30, and a fourth transmission belt 287 linked with the double-track wheel shaft 283 rotates along with the fourth transmission belt 283, and because the push-up gear 285 and the fourth transmission belt 287 are fixedly connected on the surface of a driven wheel shaft 286, the push-up gear 285 also rotates, and at the same time, the rack 288 moves upwards to push the push-up plate 281 to move upwards, so that the rest of the pH test paper is pushed upwards, and finally, the paper pushing, the paper taking and the paper fixing are performed synchronously;

B. after the solution to be detected is absorbed by a dropper, the bottom end of the dropper is inserted into the dropping hole 20, and then the solution is dropped on the surface of the pH test paper to wait for the solution and the pH test paper to generate a color reaction;

C. the pH test paper box 15 is fixed at the front end of the placing rack 12 through the sliding connection of the sliding chute 17 and the sliding rod 14, the incandescent lamp 13 is started, and the characteristic that the incandescent lamp 13 generates heat is used as a heat source to dry the pH test paper;

D. adjusting the refractive transparent plate 9 to an initial position so that the front surface of the refractive transparent plate 9 corresponds to the initial color and the pH value on the pH chromaticity disk 10;

E. observing whether the projection plate 8 has colored light beams or not, rotating the rotating handle 5 to enable the fine-adjustment driven gear 11 to rotate slowly, adjusting the fine-adjustment driven gear 11 to enable the refraction transparent plate 9 to rotate, stopping rotating when the light beams are just totally reflected after the light beams rotate to a certain angle, and observing the position, corresponding to the front surface of the refraction transparent plate 9, on the pH color disc 10;

F. the corresponding reading on the pH scale 10 is read, which is the pH of the solution.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention are equivalent to or changed within the technical scope of the present invention.