Thiourea production and preparation reaction device

Abstract

The invention provides a thiourea production and preparation reaction device, and relates to the field of thiourea production and preparation. The device comprises a bottom plate, a limiting cylinder is fixedly connected to the upper surface of the bottom plate, a shell is fixedly connected to the side surface of the limiting cylinder, a limiting device is arranged on the inner side surface of the shell, a reaction barrel is arranged on the inner side surface of the limiting cylinder, and fixing blocks are fixedly connected to the two sides of the reaction barrel; the reaction barrel is slidably connected to the inner side surface of the limiting cylinder through a fixing block, a spraying device is arranged on the side surface, close to the upper end, of the reaction barrel, and a shell is fixedly connected to the upper surface of the reaction barrel. The fixed long rod is moved downwards through the weight of the butterfly plate, so that the opening and closing degree of the butterfly plate is adjusted, the optimal reaction efficiency is provided, the reaction barrel is limited by arranging the limiting device, limiting is relieved after the lime nitrogen solution is conveyed, and incomplete reaction caused by gas conveying when liquid is little is prevented.

Description

Technical Field

[0001] The invention relates to the technical field of thiourea production and preparation, in particular to a thiourea production and preparation reaction device. Background Art

[0002] Thiourea is an organic sulfur-containing compound with the chemical formula CH4N2S. It is a white and shiny crystal with a bitter taste, a density of 31.41 g / cm3, and a melting point of 176-178°C. It is used as a raw material for the manufacture of drugs, dyes, resins, compression molding powders, etc. It is also used as a vulcanization accelerator for rubber and a flotation agent for metal minerals. The byproduct thiourea is produced by absorbing hydrogen sulfide gas with lime nitrogen. Since the affinity between hydrogen sulfide and lime nitrogen solution is quite good, the reaction is very complete. By controlling the ratio of hydrogen sulfide and lime nitrogen solution, the conversion of hydrogen sulfide can be improved.

[0003] The existing thiourea high-efficiency reaction device cannot quickly and accurately adjust the amount of lime nitrogen solution according to the amount of hydrogen sulfide introduced during use, so that the ratio between hydrogen sulfide and lime nitrogen solution cannot be well controlled, resulting in a low conversion rate of hydrogen sulfide. At the same time, the preparation efficiency of thiourea solution is also low, and it is very inconvenient to use. The published patent "202210829179.6" records that by setting a ratio adjustment mechanism, the amount of lime nitrogen solution can be quickly and accurately adjusted according to the amount of hydrogen sulfide to achieve a good control of the ratio between hydrogen sulfide and lime nitrogen solution. However, the gas is first filled into the tank, and then the amount of liquid is adjusted according to the gas. This may cause the liquid to have a smaller contact surface with the gas when it is transported into the gas, causing it to react more slowly. Therefore, in view of the above situation, it is urgent to develop a thiourea high-efficiency reaction device to overcome the shortcomings in current practical applications. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the present invention provides a thiourea production and preparation reaction device, which solves the problem that the liquid has a small contact surface with the gas when being transported into the gas, resulting in a slow reaction.

[0006] (II) Technical solution

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: a thiourea production and preparation reaction device, comprising a bottom plate, the upper surface of the bottom plate is fixedly connected to a limiting cylinder, the side surface of the limiting cylinder is fixedly connected to a shell, the inner surface of the shell is provided with a limiting device, the inner surface of the limiting cylinder is provided with a reaction barrel, both sides of the reaction barrel are fixedly connected to fixed blocks, the reaction barrel is slidably connected to the inner surface of the limiting cylinder through the fixed blocks, the side surface of the reaction barrel near the upper end is provided with a spray device, the upper surface of the reaction barrel is fixedly connected to The invention discloses a shell, wherein the inner surface of the upper end of the reaction barrel is fixedly connected with an input pipe, the left surface of the bottom plate is provided with an opening and closing device, the lower surface of the reaction barrel is provided with a buffer device, the lower surface of the reaction barrel is slidably connected to the inner surface of the bottom plate, the inner surface of the shell is fixedly connected with a second motor, the output end of the second motor is fixedly connected with a stirring rod, the side surface of the stirring rod is fixedly connected with a stirring blade, the inner surface of the reaction barrel near the lower end is fixedly connected with an air supply pipe, the air supply pipe is provided with holes, and the rear end of the reaction barrel is externally connected with a conveying circular pipe.

[0008] Preferably, the spraying device includes a circular tube, a water pipe and a water pump, the circular tube is fixedly connected to the inner surface of the reaction barrel near the upper end, the side surface of the circular tube near the inner end is provided with a plurality of nozzles, the nozzles penetrate the reaction barrel and are connected to the interior of the reaction barrel, the upper end of the water pipe is fixedly connected to the lower surface of the circular tube, the water pump is fixedly connected to the lower end of the water pipe, a short tube is fixedly connected to the side of the water pump close to the reaction barrel, the short tube penetrates the side surface of the reaction barrel and is connected to the interior of the reaction barrel, and the circular tube, water pipe, water pump and short tube are interconnected.

[0009] Preferably, the limiting device includes a first motor, a first gear, a second gear, a screw rod, a movable plate and a limiting bevel block, the first motor is fixedly connected to the inner surface of the shell, the first gear is fixedly connected to the output end of the first motor, the second gear is meshed with the first gear, the second gear is fixedly connected to the side surface of the screw rod in the middle, the screw rod is rotatably connected to the inner surface of the shell, the movable plate is threadedly connected to the side surface of the screw rod, the movable plate is slidably connected to the inner surface of the shell, and the limiting bevel block is fixedly connected to the side surface of the movable plate close to the second gear.

[0010] Preferably, the buffer device includes a first sliding rod, a buffer spring and a slide groove, the upper end of the first sliding rod is fixedly connected to the lower surface of the reaction barrel, a plurality of first sliding rods are provided, the lower end of the first sliding rod is slidably connected to the inner surface of the bottom plate, the first sliding rod is sleeved on the side surface of the first sliding rod, the upper end of the buffer spring is fixedly connected to the lower surface of the reaction barrel, and the lower end of the buffer spring is fixedly connected to the inner bottom surface of the bottom plate.

[0011] Preferably, the opening and closing device includes a plastic hose, a pipeline, a first limit block, a fixed short rod, a fixed long rod, a roller, a movable slider, a toothed plate, a third gear, a round rod, a second limit block, a second slide rod and a push spring. One end of the gas pipe passes through the reaction barrel and is slidably connected to the inner surface of the bottom plate. The upper end of the plastic hose is fixedly connected to one end of the gas pipe, and the lower end of the plastic hose is fixedly connected to one end of the pipeline. The gas pipe, plastic hose and pipeline are interconnected, and a check valve is arranged inside the gas pipe near the plastic hose.

[0012] Preferably, the first limit block is fixedly connected to the side surface of the base plate, the pipeline is fixedly connected to the inner surface of the first limit block, one end of the fixed short rod is fixedly connected to the side surface of the reaction barrel and is slidably connected to the inner surface of the base plate, the upper end of the fixed long rod is fixedly connected to the other end of the fixed short rod, the roller is rotatably connected to the inner surface of the fixed long rod at the lower end, the second limit block is fixedly connected to the upper surface of the first limit block, the movable slider is slidably connected to the inner surface of the second limit block, and a sensing device is provided on the lower surface of the movable slider.

[0013] Preferably, the tooth plate is fixedly connected to a side of the moving slider close to the third gear, the tooth plate and the third gear are meshingly connected, the second sliding rod is slidably connected to the inner surface of the second limit block, one end of the second sliding rod is fixedly connected to the side surface of the moving slider, the push spring is sleeved on the side surface of the second sliding rod, one end of the push spring is fixedly connected to the side surface of the moving slider, and the other end of the push spring is fixedly connected to the inner surface of the second limit block.

[0014] Preferably, the upper end of the round rod is fixedly connected to the lower surface of the third gear, the upper end of the butterfly plate is fixedly connected to the lower end of the round rod, the round rod is rotatably connected to the inner surface of the first limit block, the butterfly plate is movably connected to the inner surface of the pipe, and the lower end of the roller contacts the inclined surface of the movable slider.

[0015] Working principle: The lime nitrogen solution is transported from the input pipe into the reaction barrel. After the transportation is completed, the first motor is started, and the first motor drives the first gear to rotate. The rotation of the first gear drives the screw to rotate through the second gear. The rotation of the screw drives the moving plate to move outward. The moving plate moves outward and drives the limiting inclined block to move slowly outward. At this time, the outer shell moves slowly downward on the inclined surface of the limiting inclined block, so that the reaction barrel is smoothly supported by the buffer spring. At the same time, the downward movement of the reaction barrel drives the fixed short rod to move downward, and then drives the fixed long rod to move downward. The roller contacts the inclined surface of the moving slider, causing the moving slider to slide toward the inside of the second limiting block. The total amount of hydrogen sulfide gas required is calculated according to the distance moved by the moving slider through the sensing device arranged at the lower end of the moving slider. The pipeline is connected to a hydrogen sulfide gas tank. The gas delivery device, the sensing device transmits the measured data to the hydrogen sulfide gas delivery device, and the hydrogen sulfide gas delivery device will prepare a certain amount of hydrogen sulfide gas for delivery. At this time, the tooth plate drives the butterfly plate to open through the third gear to put the hydrogen sulfide gas into the gas pipe through the plastic hose. The opening and closing degree of the butterfly plate is determined according to the amount of lime nitrogen solution, so as to increase the reaction rate. The gas flows into the liquid in the reaction barrel from the holes on the gas pipe. At this time, the second motor starts to drive the stirring rod to rotate, and the stirring rod drives the stirring blades to stir the liquid. At the same time, the water pump starts to transport the lime nitrogen solution at the bottom into the circular pipe and spray it out from the nozzle, so as to react with the residual hydrogen sulfide gas overflowing from the lime nitrogen solution to increase the reaction rate, and then the reacted solid-liquid mixture is transported out from the delivery circular pipe.

[0016] (III) Beneficial effects

[0017] The present invention provides a thiourea production and preparation reaction device, which has the following beneficial effects:

[0018] 1. The reaction speed is increased by setting a stirring rod and a stirring blade, and the gas is directly transported into the liquid through the holes set on the gas pipe to increase the contact area between the gas and the liquid and improve the reaction efficiency. The lime nitrogen solution below is transported to the top for spraying by setting a spray device to react with the residual hydrogen sulfide gas.

[0019] 2. A buffer device is provided to buffer and support the reaction barrel, thereby facilitating the detection of the weight of the lime nitrogen solution transported in the reaction barrel. The fixed long rod is moved downward by its weight to adjust the opening and closing degree of the butterfly plate to provide the best reaction efficiency.

[0020] 3. The reaction barrel is limited by setting a limit device, and the limit is released after the lime nitrogen solution is delivered, to prevent incomplete reaction caused by delivering gas when there is less liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1This is a schematic diagram of the overall structure of a thiourea production and preparation reaction device proposed by the present invention;

[0022] Figure 2 A schematic diagram of the internal structure of a limiting shell of a thiourea production and preparation reaction device proposed by the present invention;

[0023] Figure 3 This is a schematic diagram of the internal structure of a reaction barrel of a thiourea production and preparation reaction device proposed by the present invention;

[0024] Figure 4 This is a rear view of a reaction barrel of a thiourea production and preparation reaction device proposed by the present invention;

[0025] Figure 5 This is a schematic diagram of the structure of a limiting device of a thiourea production and preparation reaction device proposed by the present invention;

[0026] Figure 6 This is a schematic diagram of the structure of a buffer device of a thiourea production and preparation reaction device proposed by the present invention;

[0027] Figure 7 This is a schematic diagram of the structure of an opening and closing device of a thiourea production and preparation reaction device proposed by the present invention;

[0028] Figure 8 This is an enlarged view of part A of a thiourea production and preparation reaction device proposed by the present invention.

[0029] Among them, 1, bottom plate; 2, limiting cylinder; 3, shell; 4, limiting device; 401, first motor; 402, first gear; 403, second gear; 404, screw rod; 405, moving plate; 406, limiting inclined block; 5, buffer device; 501, first slide bar; 502, buffer spring; 503, slide groove; 6, opening and closing device; 601, plastic hose; 602, pipeline; 603, first limiting block; 604, fixed short rod; 605, first gear; 606, second gear; 607, first gear; 608, first gear; 609, first gear; 610, first gear; 611, first gear; 612, first gear; 613, first gear; 614, first gear; 615, first gear; 616, first gear; 617, first gear; 618, first gear; 619, first gear; 620, first gear; 621, first gear; 622, first gear; 623, first gear; 624, first gear; 625, first gear; 626, first gear; 627, first gear; 628, first gear; 629, first gear; 630, first gear; 631, first gear; 632, first gear; 633, first gear; 634, first gear; 635, first gear; 636, first gear; 637, first gear; 638, first gear; 639, first gear; 640, first gear; 641, first gear; 642, first gear; 643, first gear; 644, first gear; 645, first gear; 646, first gear; 647, first gear; 648, first gear; 649, first gear; 650 05. Fixed long rod; 606. Roller; 607. Moving slider; 608. Tooth plate; 609. Third gear; 610. Round rod; 611. Butterfly plate; 612. Second limit block; 613. Second slide bar; 614. Push spring; 7. Reaction barrel; 8. Shell; 9. Stirring rod; 10. Stirring blade; 11. Air pipe; 12. Fixed block; 13. Spraying device; 1301. Round pipe; 1302. Water pipe; 1303. Water pump. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] like Figure 1-8 As shown, an embodiment of the present invention provides a thiourea production and preparation reaction device, including a bottom plate 1, the upper surface of the bottom plate 1 is fixedly connected to a limiting cylinder 2, the side surface of the limiting cylinder 2 is fixedly connected to a shell 3, the inner surface of the shell 3 is provided with a limiting device 4, the inner surface of the limiting cylinder 2 is provided with a reaction barrel 7, both sides of the reaction barrel 7 are fixedly connected to fixed blocks 12, the reaction barrel 7 is slidably connected to the inner surface of the limiting cylinder 2 through the fixed blocks 12, the side surface of the reaction barrel 7 near the upper end is provided with a spray device 13, the upper surface of the reaction barrel 7 is fixedly connected to a shell 8, and the inner surface of the upper end of the reaction barrel 7 is provided with a spray device 13. An input pipe is fixedly connected, an opening and closing device 6 is provided on the left surface of the bottom plate 1, a buffer device 5 is provided on the lower surface of the reaction barrel 7, the lower surface of the reaction barrel 7 is slidably connected to the inner surface of the bottom plate 1, a second motor is fixedly connected to the inner surface of the outer shell 8, a stirring rod 9 is fixedly connected to the output end of the second motor, a stirring blade 10 is fixedly connected to the side surface of the stirring rod 9, an air pipe 11 is fixedly connected to the inner surface of the reaction barrel 7 near the lower end, holes are provided on the air pipe 11, a conveying circular pipe is externally connected to the rear end of the reaction barrel 7, and a device for conveying lime nitrogen solution is externally connected to the input pipe for quantitative conveying.

[0032] The spray device 13 includes a circular tube 1301, a water pipe 1302 and a water pump 1303. The circular tube 1301 is fixedly connected to the inner surface of the reaction barrel 7 near the upper end. A plurality of nozzles are arranged on the side surface of the circular tube 1301 near the inner end. The nozzles penetrate the reaction barrel 7 and are connected to the interior of the reaction barrel 7. The upper end of the water pipe 1302 is fixedly connected to the lower surface of the circular tube 1301. The water pump 1303 is fixedly connected to the lower end of the water pipe 1302. A short tube is fixedly connected to the side of the water pump 1303 near the reaction barrel 7. The short tube penetrates the side surface of the reaction barrel 7 and is connected to the interior of the reaction barrel 7. The circular tube 1301, the water pipe 1302, the water pump 1303 and the short tube are interconnected. When the water pump 1303 is started, the lime nitrogen solution at the bottom is transported to the circular tube 1301 and sprayed out from the nozzle, thereby reacting with the residual hydrogen sulfide gas overflowing from the lime nitrogen solution to increase the reaction rate.

[0033] The limiting device 4 includes a first motor 401, a first gear 402, a second gear 403, a screw rod 404, a movable plate 405 and a limiting inclined block 406. The first motor 401 is fixedly connected to the inner surface of the housing 3, the first gear 402 is fixedly connected to the output end of the first motor 401, the second gear 403 is meshed with the first gear 402, the second gear 403 is fixedly connected to the side surface of the screw rod 404 in the middle, the screw rod 404 is rotatably connected to the inner surface of the housing 3, and the movable plate 405 is threadedly connected to the screw rod. 404, the movable plate 405 is slidably connected to the inner surface of the shell 3, the limiting bevel block 406 is fixedly connected to the side surface of the movable plate 405 near the second gear 403, the first motor 401 drives the first gear 402 to rotate, the first gear 402 rotates through the second gear 403 to drive the screw rod 404 to rotate, the screw rod 404 rotates to drive the movable plate 405 to move outward, the movable plate 405 moves outward to drive the limiting bevel block 406 to move slowly outward, and the shell 8 moves slowly downward on the inclined surface of the limiting bevel block 406.

[0034] The buffer device 5 includes a first slide bar 501, a buffer spring 502 and a slide groove 503. The upper end of the first slide bar 501 is fixedly connected to the lower surface of the reaction barrel 7. A plurality of first slide bars 501 are provided. The lower end of the first slide bar 501 is slidably connected to the inner surface of the base plate 1. The first slide bar 501 is sleeved on the side surface of the first slide bar 501. The upper end of the buffer spring 502 is fixedly connected to the lower surface of the reaction barrel 7. The lower end of the buffer spring 502 is fixedly connected to the inner bottom surface of the base plate 1. The buffer device 5 plays a supporting and buffering role.

[0035] The opening and closing device 6 includes a plastic hose 601, a pipeline 602, a first limit block 603, a fixed short rod 604, a fixed long rod 605, a roller 606, a movable slider 607, a tooth plate 608, a third gear 609, a round rod 610, a second limit block 612, a second slide bar 613 and a push spring 614. One end of the gas pipe 11 passes through the reaction barrel 7 and is slidably connected to the inner surface of the bottom plate 1. The upper end of the plastic hose 601 is fixedly connected to one end of the gas pipe 11, and the lower end of the plastic hose 601 is fixedly connected to one end of the pipeline 602. The gas pipe 11, the plastic hose 601 and the pipeline 602 are connected to each other. A check valve is provided inside the gas pipe 11 near the plastic hose 601. The first limit block 603 is fixedly connected to the side surface of the bottom plate 1, the pipeline 602 is fixedly connected to the inner surface of the first limit block 603, one end of the fixed short rod 604 is fixedly connected to the side surface of the reaction barrel 7 and slidably connected to the inner surface of the bottom plate 1, the upper end of the fixed long rod 605 is fixedly connected to the other end of the fixed short rod 604, the roller 606 is rotatably connected to the inner surface of the fixed long rod 605 at the lower end, the second limit block 612 is fixedly connected to the upper surface of the first limit block 603, the moving slider 607 is slidably connected to the inner surface of the second limit block 612, the lower surface of the moving slider 607 is provided with a sensing device, and the tooth plate 608 is fixedly connected to the moving slider 607 near the inner surface. On the side near the third gear 609, the tooth plate 608 is meshed with the third gear 609, the second slide bar 613 is slidably connected to the inner surface of the second limit block 612, one end of the second slide bar 613 is fixedly connected to the side surface of the moving slider 607, the push spring 614 is sleeved on the side surface of the second slide bar 613, one end of the push spring 614 is fixedly connected to the side surface of the moving slider 607, the other end of the push spring 614 is fixedly connected to the inner surface of the second limit block 612, the upper end of the round rod 610 is fixedly connected to the lower surface of the third gear 609, the upper end of the butterfly plate 611 is fixedly connected to the lower end of the round rod 610, and the round rod 610 is rotatably connected to the first limit block 60 3, the butterfly plate 611 is movably connected to the inner surface of the pipeline 602, the lower end of the roller 606 contacts the inclined surface of the movable slider 607, and the sensing device arranged at the lower end of the movable slider 607 measures the total amount of hydrogen sulfide gas required according to the distance moved by the movable slider 607. The method of measuring the distance by the sensing device is similar to that of laser ranging. The pipeline 602 is externally connected to a hydrogen sulfide gas conveying device, and the sensing device transmits the measured data to the hydrogen sulfide gas conveying device. The hydrogen sulfide gas conveying device will prepare a certain amount of hydrogen sulfide gas for conveying, and will stop conveying the hydrogen sulfide gas after conveying a certain amount of hydrogen sulfide gas. The check valve can prevent the lime nitrogen solution from flowing back into the pipeline 602.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A thiourea production reaction device, comprising a bottom plate (1), characterized in that: The upper surface of the bottom plate (1) is fixedly connected to a limiting cylinder (2); the side surface of the limiting cylinder (2) is fixedly connected to a shell (3); the inner surface of the shell (3) is provided with a limiting device (4); the inner surface of the limiting cylinder (2) is provided with a reaction barrel (7); both sides of the reaction barrel (7) are fixedly connected to fixing blocks (12); the reaction barrel (7) is slidably connected to the inner surface of the limiting cylinder (2) through the fixing blocks (12); the side surface of the reaction barrel (7) close to the upper end is provided with a spray device (13); the upper surface of the reaction barrel (7) is fixedly connected to a shell (8); the inner surface of the upper end of the reaction barrel (7) is provided with a spray device (13); The bottom plate (1) is provided with an opening and closing device (6), the lower surface of the reaction barrel (7) is provided with a buffer device (5), the lower surface of the reaction barrel (7) is slidably connected to the inner surface of the bottom plate (1), the inner surface of the shell (8) is fixedly connected to a second motor, the output end of the second motor is fixedly connected to a stirring rod (9), the side surface of the stirring rod (9) is fixedly connected to a stirring blade (10), the inner surface of the reaction barrel (7) near the lower end is fixedly connected to an air supply pipe (11), the air supply pipe (11) is provided with holes, and the rear end of the reaction barrel (7) is externally connected to a delivery circular pipe.

2. A thiourea production and preparation reaction device according to claim 1, characterized in that: The spray device (13) comprises a circular tube (1301), a water pipe (1302) and a water pump (1303); the circular tube (1301) is fixedly connected to the inner surface of the reaction barrel (7) near the upper end; a plurality of nozzles are arranged on the side surface of the circular tube (1301) near the inner end; the nozzles penetrate the reaction barrel (7) and are connected to the interior of the reaction barrel (7); the upper end of the water pipe (1302) is fixedly connected to the lower surface of the circular tube (1301); the water pump (1303) is fixedly connected to the lower end of the water pipe (1302); a short tube is fixedly connected to the side of the water pump (1303) near the reaction barrel (7); the short tube penetrates the side surface of the reaction barrel (7) and is connected to the interior of the reaction barrel (7); the circular tube (1301), the water pipe (1302), the water pump (1303) and the short tube are mutually connected.

3. A thiourea production and preparation reaction device according to claim 1, characterized in that: The limiting device (4) comprises a first motor (401), a first gear (402), a second gear (403), a screw rod (404), a movable plate (405) and a limiting inclined block (406); the first motor (401) is fixedly connected to the inner surface of the housing (3); the first gear (402) is fixedly connected to the output end of the first motor (401); the second gear (403) and the first gear (402) are meshed with each other; the second gear (403) is fixedly connected to the side surface of the screw rod (404) in the middle; the screw rod (404) is rotatably connected to the inner surface of the housing (3); the movable plate (405) is threadedly connected to the side surface of the screw rod (404); the movable plate (405) is slidably connected to the inner surface of the housing (3); and the limiting inclined block (406) is fixedly connected to the side surface of the movable plate (405) close to the second gear (403).

4. A thiourea production and preparation reaction device according to claim 1, characterized in that: The buffer device (5) comprises a first slide bar (501), a buffer spring (502) and a slide groove (503); the upper end of the first slide bar (501) is fixedly connected to the lower surface of the reaction barrel (7); a plurality of the first slide bars (501) are provided; the lower end of the first slide bar (501) is slidably connected to the inner surface of the bottom plate (1); the first slide bar (501) is sleeved on the side surface of the first slide bar (501); the upper end of the buffer spring (502) is fixedly connected to the lower surface of the reaction barrel (7); and the lower end of the buffer spring (502) is fixedly connected to the inner bottom surface of the bottom plate (1).

5. A thiourea production and preparation reaction device according to claim 1, characterized in that: The opening and closing device (6) comprises a plastic hose (601), a pipeline (602), a first limit block (603), a fixed short rod (604), a fixed long rod (605), a roller (606), a movable slider (607), a toothed plate (608), a third gear (609), a round rod (610), a second limit block (612), a second slider (613) and a push spring (614). One end of the gas pipe (11) passes through the reaction barrel (7) and is slidably connected to the inner surface of the bottom plate (1). The upper end of the plastic hose (601) is fixedly connected to one end of the gas pipe (11), and the lower end of the plastic hose (601) is fixedly connected to one end of the pipeline (602). The gas pipe (11), the plastic hose (601) and the pipeline (602) are interconnected. A check valve is arranged inside the gas pipe (11) near the plastic hose (601).

6. A thiourea production and preparation reaction device according to claim 5, characterized in that: The first limit block (603) is fixedly connected to the side surface of the bottom plate (1), the pipeline (602) is fixedly connected to the inner surface of the first limit block (603), one end of the fixed short rod (604) is fixedly connected to the side surface of the reaction barrel (7) and slidably connected to the inner surface of the bottom plate (1), the upper end of the fixed long rod (605) is fixedly connected to the other end of the fixed short rod (604), the roller (606) is rotatably connected to the inner surface of the fixed long rod (605) at the lower end, the second limit block (612) is fixedly connected to the upper surface of the first limit block (603), the movable slider (607) is slidably connected to the inner surface of the second limit block (612), and the lower surface of the movable slider (607) is provided with a sensing device.

7. A thiourea production and preparation reaction device according to claim 5, characterized in that: The tooth plate (608) is fixedly connected to a side of the movable slider (607) close to the third gear (609), the tooth plate (608) and the third gear (609) are meshingly connected, the second slide bar (613) is slidably connected to the inner surface of the second limit block (612), one end of the second slide bar (613) is fixedly connected to the side surface of the movable slider (607), the push spring (614) is sleeved on the side surface of the second slide bar (613), one end of the push spring (614) is fixedly connected to the side surface of the movable slider (607), and the other end of the push spring (614) is fixedly connected to the inner surface of the second limit block (612).

8. A thiourea production and preparation reaction device according to claim 5, characterized in that: The upper end of the round rod (610) is fixedly connected to the lower surface of the third gear (609), the upper end of the butterfly plate (611) is fixedly connected to the lower end of the round rod (610), the round rod (610) is rotatably connected to the inner surface of the first limit block (603), the butterfly plate (611) is movably connected to the inner surface of the pipe (602), and the lower end of the roller (606) contacts the inclined surface of the movable slider (607).

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