Reaction device for hydrofluoric acid

Abstract

The invention relates to the technical field of chemical tests, and discloses a reaction device for hydrofluoric acid, which comprises an L-shaped bracket and a hydrofluoric acid bottle, and a liquid dropping mechanism is arranged between the L-shaped bracket and the hydrofluoric acid bottle; the liquid dropping mechanism comprises a bottle frame, an internal thread connector and a first fixing plate, the bottle frame and the first fixing plate are fixedly installed on an L-shaped support, the hydrofluoric acid bottle is placed in the bottle frame, a fixing connector is fixedly installed at the left end of the first fixing plate, and after a bottle cap is replaced, the space between the interior of the hollow bin and the liquid inlet hole is blocked through a clamping head and a sealing gasket; in the inserting process, due to the fact that the long hose is clenched and blocked by the hose clenching structure, the solution cannot flow out after entering the long hose, the solution does not need to be worried about flowing out, and in the opening and closing process, opening and closing are achieved by operating the hose clenching structure, direct contact with the long hose is not needed, and the long hose cannot flow out. Therefore, the problem that the solution flows to hands is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of chemical experiments, in particular to a reaction device for hydrofluoric acid. Background Art

[0002] Hydrofluoric acid is an aqueous solution of hydrogen fluoride gas, a clear, colorless, fuming corrosive liquid with a strong pungent odor. It is highly corrosive and is also corrosive to glass. When conducting a hydrofluoric acid and glass reaction experiment, a hydrofluoric acid and glass reaction device is needed to pour the hydrofluoric acid into a glass test tube and observe the corrosion effect of the glass test tube. First, when conducting a hydrofluoric acid and glass reaction experiment, the prior art directly picks up the hydrofluoric acid bottle and pours it into the glass test tube. If the operation is wrong, it may pour on the hands, which is very dangerous. Although some reaction devices do not need to pour the hydrofluoric acid bottle and fix it upside down, the hydrofluoric acid can be released by simply opening the hydrofluoric acid bottle, but the hydrofluoric acid bottle still needs to be opened manually. When unscrewing the bottle cap or removing the bottle stopper, there is still the problem of hydrofluoric acid flowing onto the hands. Summary of the invention

[0003] The object of the present invention is to provide a reaction device for hydrofluoric acid to solve the problems raised in the above background technology.

[0004] To achieve the above object, the present invention provides the following technical solution: a reaction device for hydrofluoric acid, comprising an L-shaped bracket and a hydrofluoric acid bottle, wherein a dripping mechanism is arranged between the L-shaped bracket and the hydrofluoric acid bottle; The dripping mechanism comprises a bottle rack, an internal threaded joint, and a fixing plate 1, wherein the bottle rack and the fixing plate 1 are fixedly mounted on an L-shaped bracket, the hydrofluoric acid bottle is placed in the bottle rack, a fixing joint is fixedly mounted on the left end of the fixing plate 1, an internal threaded joint is threadedly sleeved on the opening of the hydrofluoric acid bottle, a hollow bin is fixedly mounted on the bottom of the internal threaded joint, and the interior of the hollow bin is communicated with the interior of the internal threaded joint, a sealing pad is fixedly mounted on the inner wall of the hollow bin, a sealing ring is fixedly mounted on the bottom opening of the hollow bin, a hard tube is slidably mounted on the inner side of the sealing ring, and a A clamping head, the outer diameter of the clamping head is larger than the inner diameter of the sealing gasket, a liquid inlet hole is provided at the connection between the hard tube and the clamping head, the bottom end of the fixed joint is connected with a long hose, the lower end of the long hose is connected with a hard dripper, the lower end of the hard tube is inserted into the fixed joint, a fixed ring is fixedly installed on the outer wall of the hard tube, the fixed ring extends into the fixed joint, and a clamping structure is provided between the fixed ring and the fixed joint, a spring is fixedly installed on the top of the fixed ring, the top of the spring is fixedly connected to the bottom of the hollow bin, and a hose pinching structure is provided on the outside of the long hose.

[0005] Furthermore, the hose clamping structure includes a slide groove and a rotating shaft. The slide groove is opened on the right outer wall of the L-shaped bracket. The rotating shaft is rotatably connected to the inner wall of the L-shaped bracket through a bearing. A two-way threaded rod is fixedly installed at the rear end of the rotating shaft. The outer wall thread sleeve of the two-way threaded rod is provided with a clamping plate. Two clamping plates are provided and are symmetrically distributed front and back about the center of the two-way threaded rod. A rubber pad is fixedly installed on the outer wall of the clamping plate facing the long hose.

[0006] Furthermore, the clamping structure includes an elastic sheet, a slope block, and a slope angle, wherein the slope angle is opened at the edges of the upper and lower surfaces of the fixed ring, the elastic sheet is fixedly installed in the fixed joint, the slope block is fixedly installed at the top of the elastic sheet, and the inclined surface on the slope block is pressed on the slope angle of the upper surface of the fixed ring. Four elastic sheets are provided, and a circular array is distributed in the fixed joint.

[0007] Furthermore, a test tube holder is fixedly mounted on the outer wall of the L-shaped bracket, a glass test tube is clamped in the test tube holder, and a waste box is arranged directly below the glass test tube.

[0008] Furthermore, an air intake pipe is connected to the outer wall of the hollow bin, an air filter is connected to the end of the air intake pipe, the connection between the air intake pipe and the hollow bin is close to the top of the hollow bin, a sealing ring 1 is fixedly installed on the inner wall of the bottom of the internal threaded joint, and a sealing ring 2 is fixedly installed on the lower end of the hard tube.

[0009] Furthermore, a screw is rotatably connected to the top of the test tube fixing seat through a bearing, a sliding rod is fixedly installed on the top of the test tube fixing seat, a lifting plate is threadedly sleeved on the outer wall of the screw, the left end of the lifting plate is fixedly connected to the outer wall of the hard dripper, the lifting plate is slidingly sleeved on the sliding rod, a gear is fixedly installed on the outer wall of the screw, the gear is meshed with a rack, and the rack is fixedly installed at the bottom of the front clamping plate.

[0010] Furthermore, a protective shell is fixedly installed on the outer wall of the L-shaped bracket, and the protective shell covers the rack, gear, screw rod, slide rod, and lifting plate, and an avoidance groove is opened on the left outer wall of the protective shell.

[0011] Furthermore, transparent plastic plates are provided at the front, back and rear of the dripping mechanism, and the transparent plastic plates are fixedly mounted on an L-shaped bracket. A magnifying glass is fixedly mounted on the position of the transparent plastic plate facing the glass test tube. An opening and closing plate is provided on the left side of the dripping mechanism, and a semicircular groove is provided on the top of the opening and closing plate. A rotating shaft 2 is fixedly mounted on the bottom inner wall of the opening and closing plate. A fixed plate 2 is rotatably connected to a bearing on the outer wall of the rotating shaft 2. The fixed plate 2 is fixedly mounted on the L-shaped bracket. Connecting plates are fixedly mounted at the front and back ends of the rotating shaft 2. A torsion spring is fixedly mounted on the outer wall of the connecting plate on the side facing the rotating shaft 2, and an end of the torsion spring away from the connecting plate is fixedly connected to the outer wall of the fixed plate 2.

[0012] Furthermore, a vacuum pump is arranged at the rear of the L-shaped bracket, the air inlet end of the vacuum pump is connected to a vacuum pipe, the top end of the vacuum pipe is connected to a vacuum head, a mounting plate is fixedly installed on the outer wall of the vacuum head, the mounting plate is fixedly installed on the top of the transparent plastic plate, the lower end opening of the vacuum head faces the hard dripper, and the air outlet end of the vacuum pump is connected to a processing box.

[0013] Furthermore, a U-shaped tube is fixedly installed on the top inner wall of the processing box, the top of the U-shaped tube is connected to the air outlet of the vacuum pump, the lower half of the U-shaped tube is located in the processing box, and the outer wall of the lower half of the U-shaped tube is provided with an air outlet hole, the left and right ends of the processing box are connected with water injection pipes, the left side of the processing box is connected with a drainage pipe, and a valve is provided at the connection between the drainage pipe and the processing box.

[0014] Compared with the prior art, the present invention has the following beneficial effects: After the bottle cap is replaced, the clamping head and the sealing gasket will block the inside of the hollow chamber and the liquid inlet hole. There is no need to worry about the solution flowing out when it is inverted. During the insertion process, the long hose is pinched and blocked by the hose pinching structure, so the solution cannot flow out after entering the long hose, and there is no need to worry about the solution flowing out. During the switching process, because the switch is realized by operating the hose pinching structure, there is no need to directly contact the long hose, thereby avoiding the problem of the solution flowing onto the hands; By rotating the rotating shaft 1 to drive the bidirectional threaded rod to rotate, the two clamping pieces move toward the long hose, and then drive the rubber pad to move and pinch the long hose. When dripping the solution, it is only necessary to rotate the rotating shaft 1 in the opposite direction to drive the clamping piece to drive the rubber pad away from the long hose. At this time, the long hose is unobstructed and the solution can flow from the long hose into the hard dripper. When the long hose is pinched, the lifting plate rises to drive the hard dripper to rise, so that the long hose itself is bent to a certain extent, thereby ensuring that when the long hose is pinched, the long hose will not be tight, resulting in the connection between the long hose and the fixed joint and the hard dripper being broken, and avoiding the hard dripper from shaking when the long hose is pinched, thereby causing the residual solution in the hard dripper to drip everywhere. When the long hose is loosened, the lifting plate drives the hard dripper to move downward, pulls the long hose apart, and ensures that the inside of the long hose is unobstructed; Transparent plastic plates are set in the front and rear directions of the dripping mechanism for protection to prevent the splashing solution from splashing onto the experimenter during the reaction. A magnifying glass is set to facilitate observation by the experimenter. When taking and placing the glass test tube and the waste box, the left space is leaked by rotating the opening and closing plate. The torsion spring and the connecting plate are set so that after the opening and closing plate is rotated, as long as the opening and closing plate is released, the torsion spring can restore the deformation and drive the connecting plate to reset, thereby driving the second rotating shaft and the opening and closing plate to reset; The air in the exhaust pipe is extracted by the vacuum pump, and then the air in the exhaust head is extracted, forming a negative pressure at the opening of the exhaust head, so that the gas generated by the volatilization and reaction of the hydrofluoric acid solution is sucked into the exhaust head and then pumped into the treatment box by the vacuum pump for treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 For the present invention Figure 1 A schematic diagram of the structure of the back view; Figure 3 It is a schematic diagram of the structure of the L-shaped bracket, glass test tube and protective housing of the present invention; Figure 4 It is a structural schematic diagram of the dripping mechanism of the present invention; Figure 5 It is a structural schematic diagram of a front cross-sectional view of the dripping mechanism of the present invention; Figure 6 It is a structural schematic diagram of an exploded view of the dripping mechanism of the present invention; Figure 7 It is a structural schematic diagram of the hose pinching structure of the present invention; Figure 8 It is a schematic diagram of the structure of the opening and closing plate, the second fixing plate, the connecting plate, the torsion spring and the second rotating shaft of the present invention; Fig. 9 It is a structural schematic diagram of the processing box, vacuum pump, vacuum head and other structures of the present invention; Fig.10 It is a structural schematic diagram of a rear cross-sectional view of a processing box of the present invention.

[0016] In the figure: 1. L-shaped bracket; 2. Hydrofluoric acid bottle; 3. Dropping mechanism; 301. Bottle rack; 302. Internal thread joint; 303. Hollow chamber; 304. Fixed plate 1; 305. Fixed joint; 306. Long hose; 307. Hard dripper; 308. Sealing pad; 309. Clamping head; 3010. Hard tube; 3011. Liquid inlet hole; 3012. Sealing ring; 3013. Spring; 3014. Fixed ring; 4. Clamping structure; 401. Elastic sheet; 402. Inclined block; 403. Slope angle; 5. Hose pinching structure; 501. Slide; 502. Rotating shaft 1; 503. Bidirectional threaded rod; 504. Pressing sheet; 6. Test tube fixing Seat; 7. Glass test tube; 8. Waste box; 9. Protective shell; 10. Inlet pipe; 11. Air filter; 12. Sealing ring one; 13. Sealing ring two; 14. Rubber pad; 15. Rack; 16. Gear; 17. Screw rod; 18. Sliding rod; 19. Lifting plate; 20. Transparent plastic plate; 21. Magnifying glass; 22. Opening and closing plate; 2201. Semicircular groove; 23. Fixed plate two; 24. Rotating shaft two; 25. Torsion spring; 26. Connecting plate; 27. Mounting plate; 28. Vacuum head; 29. ​​Vacuum pipe; 30. Vacuum pump; 31. Processing box; 3101. Water injection pipe; 3102. Drain pipe; 3103. U-shaped pipe; 3104. Air outlet. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Example

[0018] See also Figure 1-Figure 7 , the present invention provides a technical solution: a reaction device for hydrofluoric acid, comprising an L-shaped bracket 1, a hydrofluoric acid bottle 2, and a dripping mechanism 3 is arranged between the L-shaped bracket 1 and the hydrofluoric acid bottle 2; The dripping mechanism 3 includes a bottle rack 301, an internal threaded joint 302, and a fixing plate 304. The bottle rack 301 and the fixing plate 304 are fixedly installed on the L-shaped bracket 1. The hydrofluoric acid bottle 2 is placed in the bottle rack 301. A fixing joint 305 is fixedly installed on the left end of the fixing plate 304. The opening of the hydrofluoric acid bottle 2 is threadedly sleeved with an internal threaded joint 302. A hollow bin 303 is fixedly installed at the bottom of the internal threaded joint 302, and the interior of the hollow bin 303 is connected to the interior of the internal threaded joint 302. A sealing gasket 308 is fixedly installed on the inner wall of the hollow bin 303. A sealing ring 3012 is fixedly installed at the bottom opening of the hollow bin 303. A hard tube 3010 is slidably provided on the inner side of the sealing ring 3012. The top of the hard tube 3010 is fixedly installed A clamping head 309 is installed, the outer diameter of the clamping head 309 is larger than the inner diameter of the sealing gasket 308, a liquid inlet hole 3011 is provided at the connection between the hard tube 3010 and the clamping head 309, the bottom end of the fixed joint 305 is connected with a long hose 306, the lower end of the long hose 306 is connected with a hard dripper 307, the lower end of the hard tube 3010 is inserted into the fixed joint 305, a fixed ring 3014 is fixedly installed on the outer wall of the hard tube 3010, the fixed ring 3014 extends into the fixed joint 305, and a clamping structure 4 is provided between the fixed ring 3014 and the fixed joint 305, a spring 3013 is fixedly installed on the top of the fixed ring 3014, the top of the spring 3013 is fixedly connected to the bottom of the hollow chamber 303, and the long hose The outer side of 306 is provided with a hose clamping structure 5. When taking out the hydrofluoric acid bottle 2, the bottle cap of the hydrofluoric acid bottle 2 can be unscrewed, and then the internal threaded joint 302 is pressed against the opening of the hydrofluoric acid bottle 2. At this time, the spring 3013 pushes the fixed ring 3014 to move away from the hollow chamber 303, thereby driving the hard tube 3010 to move away from the hollow chamber 303, so that the clamping head 309 is tightly pressed on the sealing gasket 308 to ensure that the solution in the hydrofluoric acid bottle 2 does not flow out. Then, the hydrofluoric acid bottle 2 is inverted to pass the hydrofluoric acid bottle 2 through the bottle rack 301, and then the bottom end of the hard tube 3010 is inserted into the fixed joint 305. As the fixed ring 3014 contacts the inner wall of the fixed joint 305, the fixed ring 3014 moves toward the hollow chamber 303. The hollow chamber 303 moves in the direction of the core chamber 303, thereby driving the hard tube 3010 to move, so that the clamping head 309 is separated from the sealing gasket 308, so that the solution in the hollow chamber 303 can enter the liquid inlet hole 3011 from the hollow chamber 303, and then flow from the hard tube 3010 into the fixed joint 305, and then flow into the long hose 306. Because the hose clamping structure 5 clamps the long hose 306, the long hose 306 is deformed and blocked, and the solution cannot enter the hard dripper 307, thereby ensuring that the solution cannot flow out. When the solution needs to be dripped out, it is only necessary to open the hose clamping structure 5 so that the long hose 306 is no longer blocked. When replacing the bottle cap, because the hydrofluoric acid bottle 2 is placed upright, there is no need to worry about the solution flowing out. After the bottle cap is replaced,The clamping head 309 and the sealing gasket 308 block the inside of the hollow chamber 303 and the liquid inlet hole 3011, so there is no need to worry about the solution flowing out when it is inverted. During the insertion process, because the long hose 306 is pinched and blocked by the hose pinching structure 5, the solution cannot flow out after entering the long hose 306, and there is no need to worry about the solution flowing out. During the switching process, because the switch is achieved by operating the hose pinching structure 5, there is no need to directly contact the long hose 306, thereby avoiding the problem of the solution flowing onto the hands. The clamping structure 4 is provided to lock the fixed ring 3014 after the hard tube 3010 is inserted into the fixed joint 305, so as to prevent the fixed ring 3014 from detaching from the fixed joint 305; The hose clamping structure 5 includes a slide 501 and a rotating shaft 502. The slide 501 is provided on the right outer wall of the L-shaped bracket 1. The rotating shaft 502 is rotatably connected to the inner wall of the L-shaped bracket 1 through a bearing. A bidirectional threaded rod 503 is fixedly installed at the rear end of the rotating shaft 502. A pressing piece 504 is provided on the outer wall thread sleeve of the bidirectional threaded rod 503. Two pressing pieces 504 are provided and are symmetrically distributed front and back about the center of the bidirectional threaded rod 503. The pressing piece 504 faces the long hose 306. A rubber pad 14 is fixedly installed on the outer wall of one side. By rotating the rotating shaft 1 502, the bidirectional threaded rod 503 is rotated, so that the two pressing pieces 504 move toward the long hose 306, and then the rubber pad 14 moves to pinch the long hose 306. When dripping the solution, it is only necessary to rotate the rotating shaft 1 502 in the opposite direction so that the pressing piece 504 drives the rubber pad 14 away from the long hose 306. At this time, the long hose 306 is unobstructed, and the solution can flow from the long hose 306 into the hard dripper 307; The clamping structure 4 includes an elastic sheet 401, an inclined surface block 402, and an inclined angle 403. The inclined surface 403 is provided at the edges of the upper and lower surfaces of the fixed circular ring 3014. The elastic sheet 401 is fixedly installed in the fixed joint 305. The inclined surface block 402 is fixedly installed on the top of the elastic sheet 401. The inclined surface on the inclined surface block 402 is pressed on the inclined surface 403 on the upper surface of the fixed circular ring 3014. There are four elastic sheets 401, and the circumferential array is distributed in the fixed joint 305. When the fixed circular ring 3014 is inserted into the fixed joint 305, the fixed circular ring 3014 pushes the inclined surface block 402 to move, thereby deforming the elastic sheet 401. After the fixed circular ring 3014 is staggered with the inclined surface block 402, the elastic sheet 401 recovers its deformation to drive the inclined surface block 402 to move, and presses the inclined surface block 402 onto the fixed circular ring 3014, thereby locking the fixed circular ring 3014. A test tube holder 6 is fixedly mounted on the outer wall of the L-shaped bracket 1, a glass test tube 7 is clamped in the test tube holder 6, and a waste box 8 is arranged directly below the glass test tube 7. The test tube holder 6 is arranged to install the glass test tube 7. During the reaction process, the glass test tube 7 dissolves and breaks, and then falls into the waste box 8, so as to prevent the dissolved glass test tube 7 and the solution from falling around; The outer wall of the hollow bin 303 is connected with an air inlet pipe 10, and the end of the air inlet pipe 10 is connected with an air filter 11. The connection between the air inlet pipe 10 and the hollow bin 303 is close to the top of the hollow bin 303. The air filter 11 connected by the air inlet pipe 10 allows the outside air to enter the hollow bin 303 after being filtered, thereby ensuring that when the solution in the hollow bin 303 flows into the liquid inlet hole 3011, the internal air pressure of the hollow bin 303 is balanced. A sealing ring 12 is fixedly installed on the inner wall of the bottom of the internal threaded joint 302 to ensure the sealing between the internal threaded joint 302 and the hydrofluoric acid bottle 2. A sealing ring 2 13 is fixedly installed on the lower end of the hard tube 3010 to ensure the sealing between the hard tube 3010 and the fixed joint 305. The top of the test tube fixing seat 6 is rotatably connected with a screw rod 17 through a bearing, and a slide rod 18 is fixedly installed on the top of the test tube fixing seat 6. The outer wall of the screw rod 17 is threadedly sleeved with a lifting plate 19. The left end of the lifting plate 19 is fixedly connected to the outer wall of the hard dripper 307. The lifting plate 19 is slidably sleeved on the slide rod 18. A gear 16 is fixedly installed on the outer wall of the screw rod 17. The gear 16 is meshed with a rack 15. The rack 15 is fixedly installed at the bottom of the front clamping piece 504. When the clamping piece 504 moves, the rack 15 is driven to move, thereby driving the gear 16 to rotate. The rotation of the gear 16 drives the screw rod 17 to rotate, thereby driving the lifting plate 19 to rise or fall. When the long hose 306 is pinched, the lifting plate 19 rises and drives the hard dripper 307 to rise, so that the long hose 306 itself is bent to a certain extent, thereby ensuring that when the long hose 306 is pinched, the long hose 306 will not be tight, resulting in the connection between the long hose 306 and the fixed joint 305 and the hard dripper 307 being broken, and avoiding the hard dripper 307 from shaking when the long hose 306 is pinched, thereby causing the residual solution in the hard dripper 307 to drip everywhere. When the long hose 306 is loosened, the lifting plate 19 drives the hard dripper 307 to move downward, pulls the long hose 306 apart, and ensures that the inside of the long hose 306 is unobstructed; A protective shell 9 is fixedly installed on the outer wall of the L-shaped bracket 1, and the protective shell 9 covers the rack 15, the gear 16, the screw 17, the slide bar 18, and the lifting plate 19, and an avoidance groove is opened on the left outer wall of the protective shell 9. The protective shell 9 is provided for protection and makes the overall appearance more beautiful. The avoidance groove is provided to ensure that structures such as the test tube fixing seat 6, the lifting plate 19, the clamping plate 504, and the rubber pad 14 can extend from the protective shell 9.

[0019] Working principle: When taking out the hydrofluoric acid bottle 2, the bottle cap of the hydrofluoric acid bottle 2 can be unscrewed, and then the internal threaded joint 302 is solidified to the opening of the hydrofluoric acid bottle 2. At this time, the spring 3013 pushes the fixed ring 3014 to move away from the hollow chamber 303, thereby driving the hard tube 3010 to move away from the hollow chamber 303, so that the clamping head 309 is tightly pressed on the sealing gasket 308 to ensure that the solution in the hydrofluoric acid bottle 2 does not flow out, and then the hydrofluoric acid bottle 2 is inverted to pass the hydrofluoric acid bottle 2 through the bottle rack 301, and then the bottom end of the hard tube 3010 is inserted into the fixed joint 305. As the fixed ring 3014 contacts the inner wall of the fixed joint 305, the fixed ring 3014 moves toward the hollow chamber 303, thereby driving the hard tube 301 0 moves, so that the clamping head 309 is separated from the sealing gasket 308, so that the solution in the hollow chamber 303 can enter the liquid inlet hole 3011 from the hollow chamber 303, and then flow into the fixed joint 305 from the hard tube 3010, and then flow into the long hose 306. At this time, the clamping piece 504 pinches the long hose 306. When the solution needs to be dripped out, it is only necessary to rotate the rotating shaft 1 502 to drive the two-way threaded rod 503 to rotate, so that the two clamping pieces 504 move away from the long hose 306 and no longer pinch the long hose 306. At this time, the interior of the long hose 306 is unobstructed, and the solution enters the hard dripper 307 and then drips out. After the dripping is completed, the rotating shaft 1 502 is rotated in the opposite direction to make the clamping piece 504 move toward the long hose 306, and the long hose 306 is pinched. Example

[0020] See also Figure 1-Figure 8 , the present invention provides a technical solution: a reaction device for hydrofluoric acid, comprising an L-shaped bracket 1, a hydrofluoric acid bottle 2, and a dripping mechanism 3 is arranged between the L-shaped bracket 1 and the hydrofluoric acid bottle 2; The dripping mechanism 3 includes a bottle rack 301, an internal threaded joint 302, and a fixing plate 304. The bottle rack 301 and the fixing plate 304 are fixedly installed on the L-shaped bracket 1. The hydrofluoric acid bottle 2 is placed in the bottle rack 301. A fixing joint 305 is fixedly installed on the left end of the fixing plate 304. The opening of the hydrofluoric acid bottle 2 is threadedly sleeved with an internal threaded joint 302. A hollow bin 303 is fixedly installed at the bottom of the internal threaded joint 302, and the interior of the hollow bin 303 is connected to the interior of the internal threaded joint 302. A sealing gasket 308 is fixedly installed on the inner wall of the hollow bin 303. A sealing ring 3012 is fixedly installed at the bottom opening of the hollow bin 303. A hard tube 3010 is slidably provided on the inner side of the sealing ring 3012. A clamping head 309 is fixedly installed on the top of the hard tube 3010. , the outer diameter of the clamping head 309 is larger than the inner diameter of the sealing gasket 308, a liquid inlet hole 3011 is provided at the connection between the hard tube 3010 and the clamping head 309, the bottom end of the fixed joint 305 is connected with a long hose 306, the lower end of the long hose 306 is connected with a hard dripper 307, the lower end of the hard tube 3010 is inserted into the fixed joint 305, a fixed ring 3014 is fixedly installed on the outer wall of the hard tube 3010, the fixed ring 3014 extends into the fixed joint 305, and a clamping structure 4 is provided between the fixed ring 3014 and the fixed joint 305, a spring 3013 is fixedly installed on the top of the fixed ring 3014, the top of the spring 3013 is fixedly connected to the bottom of the hollow bin 303, and a hose pinching structure 5 is provided on the outer side of the long hose 306; A test tube holder 6 is fixedly mounted on the outer wall of the L-shaped bracket 1, a glass test tube 7 is clamped in the test tube holder 6, and a waste box 8 is arranged directly below the glass test tube 7; A protective shell 9 is fixedly mounted on the outer wall of the L-shaped bracket 1, and the protective shell 9 covers the rack 15, the gear 16, the screw rod 17, the slide rod 18, and the lifting plate 19, and an avoidance groove is opened on the left outer wall of the protective shell 9; Transparent plastic plates 20 are arranged at the front, back and rear of the dripping mechanism 3, and the transparent plastic plates 20 are fixedly mounted on the L-shaped bracket 1. A magnifying glass 21 is fixedly mounted on the transparent plastic plate 20 facing the glass test tube 7. An opening and closing plate 22 is arranged on the left side of the dripping mechanism 3, and a semicircular groove 2201 is arranged on the top of the opening and closing plate 22. A rotating shaft 24 is fixedly mounted on the inner wall of the bottom of the opening and closing plate 22. A fixed plate 23 is rotatably connected to the outer wall of the rotating shaft 24 through a bearing. The fixed plate 23 is fixedly mounted on the L-shaped bracket 1. Connecting plates 26 are fixedly mounted on the front and back ends of the rotating shaft 24, and the connecting plate 26 faces the outer side of the rotating shaft 24. A torsion spring 25 is fixedly installed on the wall, and one end of the torsion spring 25 away from the connecting disk 26 is fixedly connected to the outer wall of the second fixed plate 23. A transparent plastic plate 20 is arranged in the front and rear directions of the dripping mechanism 3 for protection to prevent the splashing solution during the reaction from splashing on the experimenter. A magnifying glass 21 is arranged to facilitate observation by the experimenter. When taking and placing the glass test tube 7 and the waste box 8, the left space is leaked by rotating the opening and closing plate 22. The torsion spring 25 and the connecting disk 26 are arranged so that after the opening and closing plate 22 is rotated, as long as the opening and closing plate 22 is released, the torsion spring 25 can restore the deformation and drive the connecting disk 26 to reset, thereby driving the second rotating shaft 24 and the opening and closing plate 22 to reset.

[0021] Working principle: When in use, when taking and placing the glass test tube 7 and the waste box 8, first rotate the opening and closing plate 22 to expose the space on the left, and then take and place the glass test tube 7 and the waste box 8. After taking and placing, just loosen the opening and closing plate 22. At this time, the torsion spring 25 restores its deformation, drives the connecting plate 26 to rotate, and then drives the second shaft 24 to rotate. The rotation of the second shaft 24 drives the opening and closing plate 22 to rotate, so that the opening and closing plate 22 is reset to form a barrier with the transparent plastic plate 20. During the reaction process, the experimenter observes the reaction process through the magnifying glass 21. Example

[0022] See also Figure 1-Figure 10 , the present invention provides a technical solution: a reaction device for hydrofluoric acid, comprising an L-shaped bracket 1, a hydrofluoric acid bottle 2, and a dripping mechanism 3 is arranged between the L-shaped bracket 1 and the hydrofluoric acid bottle 2; The dripping mechanism 3 includes a bottle rack 301, an internal threaded joint 302, and a fixing plate 304. The bottle rack 301 and the fixing plate 304 are fixedly installed on the L-shaped bracket 1. The hydrofluoric acid bottle 2 is placed in the bottle rack 301. A fixing joint 305 is fixedly installed on the left end of the fixing plate 304. The opening of the hydrofluoric acid bottle 2 is threadedly sleeved with an internal threaded joint 302. A hollow bin 303 is fixedly installed at the bottom of the internal threaded joint 302, and the interior of the hollow bin 303 is connected to the interior of the internal threaded joint 302. A sealing gasket 308 is fixedly installed on the inner wall of the hollow bin 303. A sealing ring 3012 is fixedly installed at the bottom opening of the hollow bin 303. A hard tube 3010 is slidably provided on the inner side of the sealing ring 3012. A clamping head 309 is fixedly installed on the top of the hard tube 3010. , the outer diameter of the clamping head 309 is larger than the inner diameter of the sealing gasket 308, a liquid inlet hole 3011 is provided at the connection between the hard tube 3010 and the clamping head 309, the bottom end of the fixed joint 305 is connected with a long hose 306, the lower end of the long hose 306 is connected with a hard dripper 307, the lower end of the hard tube 3010 is inserted into the fixed joint 305, a fixed ring 3014 is fixedly installed on the outer wall of the hard tube 3010, the fixed ring 3014 extends into the fixed joint 305, and a clamping structure 4 is provided between the fixed ring 3014 and the fixed joint 305, a spring 3013 is fixedly installed on the top of the fixed ring 3014, the top of the spring 3013 is fixedly connected to the bottom of the hollow bin 303, and a hose pinching structure 5 is provided on the outer side of the long hose 306; A test tube holder 6 is fixedly mounted on the outer wall of the L-shaped bracket 1, a glass test tube 7 is clamped in the test tube holder 6, and a waste box 8 is arranged directly below the glass test tube 7; A protective shell 9 is fixedly mounted on the outer wall of the L-shaped bracket 1, and the protective shell 9 covers the rack 15, the gear 16, the screw rod 17, the slide rod 18, and the lifting plate 19, and an avoidance groove is opened on the left outer wall of the protective shell 9; Transparent plastic plates 20 are provided at the front, back and rear of the dripping mechanism 3, and the transparent plastic plate 20 is fixedly mounted on the L-shaped bracket 1. A magnifying glass 21 is fixedly mounted on the position of the transparent plastic plate 20 facing the glass test tube 7. An opening and closing plate 22 is provided on the left side of the dripping mechanism 3. A semicircular groove 2201 is provided on the top of the opening and closing plate 22. A rotating shaft 24 is fixedly mounted on the inner wall of the bottom of the opening and closing plate 22. A fixed plate 23 is rotatably connected to the outer wall of the rotating shaft 24 through a bearing. The fixed plate 23 is fixedly mounted on the L-shaped bracket 1. Connecting plates 26 are fixedly mounted on the front and back ends of the rotating shaft 24. A torsion spring 25 is fixedly mounted on the outer wall of the connecting plate 26 facing the rotating shaft 24. One end of the torsion spring 25 away from the connecting plate 26 is fixedly connected to the outer wall of the fixed plate 23. An air pump 30 is provided at the rear of the L-shaped bracket 1, and an air inlet end of the air pump 30 is connected to an air extraction pipe 29, and an air extraction head 28 is connected to the top of the air extraction pipe 29. A mounting plate 27 is fixedly installed on the outer wall of the air extraction head 28, and the mounting plate 27 is fixedly installed on the top of the transparent plastic plate 20. The lower end opening of the air extraction head 28 faces the hard dripper 307, and the air outlet end of the air pump 30 is connected to a processing box 31. The air in the air extraction pipe 29 is extracted by the air pump 30, and then the air in the air extraction head 28 is extracted, and a negative pressure is formed at the opening of the air extraction head 28, so that the gas generated by the volatilization and reaction of the hydrofluoric acid solution is sucked into the air extraction head 28, and then pumped into the processing box 31 by the air pump 30 for treatment; A U-shaped tube 3103 is fixedly installed on the top inner wall of the treatment box 31, and the top of the U-shaped tube 3103 is connected to the air outlet end of the vacuum pump 30. The lower half of the U-shaped tube 3103 is located in the treatment box 31, and the outer wall of the lower half of the U-shaped tube 3103 is provided with an air outlet hole 3104. The left and right ends of the treatment box 31 are connected with a water injection pipe 3101, and the left side of the treatment box 31 is connected with a drain pipe 3102, and a valve is provided at the connection between the drain pipe 3102 and the treatment box 31. By adding water into the treatment box 31, hydrofluoric acid gas that is easily soluble in water is absorbed. The air outlet hole 3104 is provided to divert the gas and inject it into the treatment box 31, so that the gas is diffused, thereby increasing the contact area with water. The drain pipe 3102 is provided to discharge the water in the treatment box 31, and the water injection pipe 3101 is provided to discharge the gas absorbed by the water and inject clean water into the treatment box 31.

[0023] Working principle: When in use, part of the hydrofluoric acid will volatilize during the dripping of the hydrofluoric acid solution and the reaction process. The vacuum pump 30 draws out the air in the vacuum pipe 29, and then draws out the air in the vacuum head 28, forming a negative pressure at the opening of the vacuum head 28, so that the gas generated by the volatilization of the hydrofluoric acid solution and the reaction is sucked into the vacuum head 28, and then pumped into the treatment box 31 by the vacuum pump 30 for treatment. The gas enters the U-shaped tube 3103 from the vacuum pump 30, and then enters the water from the air outlet 3104, and the water absorbs the hydrofluoric acid gas therein.

[0024] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of the present invention.

Claims

1. A hydrofluoric acid reaction device, comprising an L-shaped bracket (1) and a hydrofluoric acid bottle (2), characterized in that: A liquid dripping mechanism (3) is provided between the L-shaped bracket (1) and the hydrofluoric acid bottle (2); The dripping mechanism (3) comprises a bottle rack (301), an internal thread joint (302), and a fixing plate (304); the bottle rack (301) and the fixing plate (304) are fixedly mounted on an L-shaped bracket (1); the hydrofluoric acid bottle (2) is placed in the bottle rack (301); a fixing joint (305) is fixedly mounted on the left end of the fixing plate (304); an internal thread joint (302) is threadedly sleeved at the opening of the hydrofluoric acid bottle (2); and the internal thread joint (305) is fixedly mounted on the left end of the fixing plate (304). A hollow bin (303) is fixedly installed at the bottom of the hollow bin (302), and the interior of the hollow bin (303) is communicated with the interior of the internal threaded joint (302), a sealing gasket (308) is fixedly installed on the inner wall of the hollow bin (303), a sealing ring (3012) is fixedly installed at the bottom opening of the hollow bin (303), a hard tube (3010) is slidably arranged on the inner side of the sealing ring (3012), and a clamping head (309) is fixedly installed on the top of the hard tube (3010). ), the outer diameter of the clamping head (309) is larger than the inner diameter of the sealing gasket (308), a liquid inlet hole (3011) is provided at the connection between the hard tube (3010) and the clamping head (309), the bottom end of the fixed joint (305) is connected to a long hose (306), the lower end of the long hose (306) is connected to a hard dripper (307), the lower end of the hard tube (3010) is inserted into the fixed joint (305), and the outer diameter of the hard tube (3010) is provided to the fixed joint (305). A fixing ring (3014) is fixedly installed on the wall, the fixing ring (3014) extends into the fixing joint (305), and a clamping structure (4) is provided between the fixing ring (3014) and the fixing joint (305), a spring (3013) is fixedly installed on the top of the fixing ring (3014), the top of the spring (3013) is fixedly connected to the bottom of the hollow chamber (303), and a hose clamping structure (5) is provided on the outside of the long hose (306).

2. A hydrofluoric acid reaction device according to claim 1, characterized in that: The hose clamping structure (5) comprises a slide groove (501) and a rotating shaft (502). The slide groove (501) is provided on the right outer wall of the L-shaped bracket (1). The rotating shaft (502) is rotatably connected to the inner wall of the L-shaped bracket (1) via a bearing. A bidirectional threaded rod (503) is fixedly mounted on the rear end of the rotating shaft (502). A clamping sheet (504) is provided on the outer wall thread sleeve of the bidirectional threaded rod (503). Two clamping sheets (504) are provided and are symmetrically distributed frontward and rearward about the center of the bidirectional threaded rod (503). A rubber pad (14) is fixedly mounted on the outer wall of the clamping sheet (504) facing the long hose (306).

3. A hydrofluoric acid reaction device according to claim 1, characterized in that: The clamping structure (4) comprises an elastic sheet (401), an inclined surface block (402), and an inclined angle (403); the inclined angle (403) is provided at the edges of the upper and lower surfaces of the fixed circular ring (3014); the elastic sheet (401) is fixedly mounted in the fixed joint (305); the inclined surface block (402) is fixedly mounted on the top of the elastic sheet (401); the inclined surface on the inclined surface block (402) is pressed against the inclined angle (403) on the upper surface of the fixed circular ring (3014); four elastic sheets (401) are provided, and are distributed in a circular array in the fixed joint (305).

4. A hydrofluoric acid reaction device according to claim 1, characterized in that: A test tube fixing seat (6) is fixedly mounted on the outer wall of the L-shaped bracket (1), a glass test tube (7) is clamped inside the test tube fixing seat (6), and a waste box (8) is arranged directly below the glass test tube (7).

5. A hydrofluoric acid reaction device according to claim 1, characterized in that: An air intake pipe (10) is connected to the outer wall of the hollow bin (303), and an air filter (11) is connected to the end of the air intake pipe (10). The connection between the air intake pipe (10) and the hollow bin (303) is close to the top of the hollow bin (303). A sealing ring 1 (12) is fixedly installed on the inner wall of the bottom of the internal threaded joint (302), and a sealing ring 2 (13) is fixedly installed on the lower end of the hard tube (3010).

6. A hydrofluoric acid reaction device according to claim 4, characterized in that: The top of the test tube fixing seat (6) is rotatably connected to a screw rod (17) via a bearing, a slide rod (18) is fixedly installed on the top of the test tube fixing seat (6), a lifting plate (19) is threadedly sleeved on the outer wall of the screw rod (17), the left end of the lifting plate (19) is fixedly connected to the outer wall of the hard dripper (307), the lifting plate (19) is slidably sleeved on the slide rod (18), a gear (16) is fixedly installed on the outer wall of the screw rod (17), the gear (16) is meshed with a rack (15), and the rack (15) is fixedly installed on the bottom of the front pressing plate (504).

7. A hydrofluoric acid reaction device according to claim 1, characterized in that: A protective shell (9) is fixedly mounted on the outer wall of the L-shaped bracket (1), the protective shell (9) covers the rack (15), the gear (16), the screw rod (17), the slide rod (18), and the lifting plate (19), and an avoidance groove is provided on the left outer wall of the protective shell (9).

8. A hydrofluoric acid reaction device according to claim 1, characterized in that: Transparent plastic plates (20) are provided at the front, rear and back of the liquid dripping mechanism (3). The transparent plastic plate (20) is fixedly mounted on the L-shaped bracket (1). A magnifying glass (21) is fixedly mounted on the portion of the transparent plastic plate (20) facing the glass test tube (7). An opening and closing plate (22) is provided on the left side of the liquid dripping mechanism (3). A semicircular groove (2201) is provided on the top of the opening and closing plate (22). A second rotating shaft (24) is fixedly mounted on the inner wall of the bottom of the opening and closing plate (22). The outer wall of the second rotating shaft (24) is rotatably connected to a second fixing plate (23) via a bearing. The second fixing plate (23) is fixedly mounted on the L-shaped bracket (1). Connecting plates (26) are fixedly mounted on the front and rear ends of the second rotating shaft (24). A torsion spring (25) is fixedly mounted on the outer wall of the connecting plate (26) on a side facing the second rotating shaft (24). The end of the torsion spring (25) away from the connecting plate (26) is fixedly connected to the outer wall of the second fixing plate (23).

9. A hydrofluoric acid reaction device according to claim 1, characterized in that: An air pump (30) is arranged at the rear of the L-shaped bracket (1); an air inlet end of the air pump (30) is connected to an air extraction pipe (29); a top end of the air extraction pipe (29) is connected to an air extraction head (28); a mounting plate (27) is fixedly mounted on the outer wall of the air extraction head (28); the mounting plate (27) is fixedly mounted on the top of the transparent plastic plate (20); a lower end opening of the air extraction head (28) faces the hard dripper (307); and an air outlet end of the air pump (30) is connected to a processing box (31).

10. A hydrofluoric acid reaction device according to claim 9, characterized in that: A U-shaped tube (3103) is fixedly mounted on the inner wall of the top of the processing box (31); the top end of the U-shaped tube (3103) is connected to the air outlet of the vacuum pump (30); the lower half of the U-shaped tube (3103) is located in the processing box (31), and an air outlet hole (3104) is provided on the outer wall of the lower half of the U-shaped tube (3103); the left and right ends of the processing box (31) are connected to water injection pipes (3101); the left side of the processing box (31) is connected to a drainage pipe (3102), and a valve is provided at the connection between the drainage pipe (3102) and the processing box (31).

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