A reagent mixing device for analytical chemistry

Abstract

The utility model discloses a reagent mixing device for analytical chemistry, comprising a bottom plate, a mixing tank and a top plate, wherein a sealed mixing structure for analytical chemistry reagents is arranged below the top plate, wherein the sealed mixing structure for analytical chemistry reagents comprises a sealing ring, a hydraulic cylinder and a connecting plate, wherein a sealing cover is fixedly mounted on the bottom end of the connecting plate, a motor is fixedly mounted on the top end of the sealing cover, and a stirring rod is fixedly mounted on the lower end of the output shaft of the motor. The reagent mixing device for analytical chemistry can pull the top plate downwards through the hydraulic cylinder, and the falling top plate can push the connecting plates on both sides to fall until the connecting plates buckle the sealing cover on the top of the mixing tank, and the stirring rod uses multiple stirring blades on the outside to mix the chemical agents inside the mixing tank, thereby reducing the toxic gases generated after the mixing of toxic and harmful chemical reagents to harm operators or corrode surrounding facilities, thereby reducing the use cost of the reagent mixing device for analytical chemistry.

Description

Technical field:

[0001] The utility model relates to the technical field of chemical analysis, in particular to a reagent mixing device for analytical chemistry. Background technology:

[0002] Chemical analysis refers to the method of determining the chemical composition or composition of a substance. Chemical analysis is required in the research, trial production, production or use of industrial raw materials, semi-finished products, finished products, agricultural soil, fertilizers, feed, and transportation fuels and lubricants. Various reagents are used in chemical analysis. Some reagents can be used alone, while some reagents need to be mixed with other reagents.

[0003] For example, the authorization announcement number "CN220677488U" is named as a reagent mixing device for analytical chemistry. Although the mixing tank can be limited by a fixed component to improve the stability of the mixing tank in the moving seat, thereby ensuring the stability of the chemical reagents during mixing, the existing reagent mixing device for analytical chemistry uses a mixing tank that can be relatively moved and adjusted and is separated from the stirring device. However, during the stirring and mixing of chemical reagents, the mixing tube is not in a relatively sealed state. Although most chemical reagent mixing processes will not produce too much gas, it is difficult to ensure that some chemical reagents are prone to produce different toxic, harmful or even corrosive gases during the chemical reaction process of stirring and mixing. The harmful gases produced in the unsealed stirring mixing tank will float and diffuse outward, which is not only likely to threaten the health of chemical workers, but also the toxic and harmful gases are likely to damage other mechanical equipment and chemical instruments in the chemical laboratory, greatly increasing the use cost of the reagent mixing device for analytical chemistry.

[0004] At the same time, the existing analytical chemistry reagent mixing device requires the reverse rotation of the threaded rod to drive the insertion rod out of the range of the slot during the mixing and cancellation operations of the chemical reagents, so that the mixing tank can be disassembled after the mixing of the chemical reagents is completed. However, when the cleaning mixing tank needs to be reinstalled back into the movable seat, it is not only a process of rotating the threaded rod, but also the installation of the mixing tank requires the reasonable correspondence of the positions of the insertion rod and the slot to achieve a firm docking. Therefore, the disassembly and installation process of the mixing tank requires more steps, which affects the ease of use of the analytical chemistry reagent mixing device. Utility model content:

[0005] The utility model aims to provide a reagent mixing device for analytical chemistry to solve the disadvantages of increased use cost and inconvenience in use.

[0006] The utility model is implemented by the following technical scheme: a reagent mixing device for analytical chemistry, comprising a bottom plate, a mixing tank and a top plate, wherein a sealed mixing structure for analytical chemistry reagents is arranged below the top plate, wherein the sealed mixing structure for analytical chemistry reagents comprises a sealing ring, a hydraulic cylinder and a connecting plate, wherein two connecting plates are fixedly installed below the top plate, a sealing cover is fixedly installed at the bottom end of the connecting plate, a motor is fixedly installed at the top end of the sealing cover, a stirring rod is fixedly installed at the lower end of the output shaft of the motor, a plurality of stirring blades are fixedly installed on the outer wall of the stirring rod, two hydraulic cylinders are fixedly installed on both sides above the bottom plate, and the sealing ring is fixedly sleeved on the top end of the outer wall of the mixing tank.

[0007] Preferably, the outer side of the sealing ring is movably connected to the inner side of the sealing cover, the top ends of the two hydraulic cylinders are fixedly connected to the lower sides of the top plate, and the two hydraulic cylinders are arranged parallel to each other.

[0008] Preferably, an anti-wear layer is fixedly mounted on the bottom end of the stirring rod, and the lower end of the anti-wear layer is arranged opposite to the inner bottom end of the mixing tank.

[0009] Preferably, a mixing device is provided above the bottom plate to facilitate the insertion structure;

[0010] The plug-in structure of the mixing device includes a connecting seat, a plug-in block and a pull block;

[0011] The connecting seat is fixedly installed above the base plate, and a plug-in block is movably connected to the inner side of the connecting seat. Two docking grooves are fixedly installed on the side walls of the plug-in block. Two pushing spring rods are fixedly installed on both sides of the interior of the connecting seat, and docking balls are fixedly installed on the ends of the two pushing spring rods. The docking balls are movably connected to the inner side of the docking groove, and the two pull blocks are fixedly installed on the outer wall of the docking ball.

[0012] Preferably, the outer wall of the connecting seat is fixed with two sliding grooves, the inner sides of the two sliding grooves are slidably connected to the side walls of the two pull blocks, the bottom end of the mixing tank is arranged opposite to the top of the connecting seat, and the bottom end of the mixing tank is fixedly connected to the top of the plug-in block.

[0013] Preferably, a toxic chemical reagent mixed with poisonous gas cleaning structure is provided above the top plate;

[0014] The toxic chemical reagent mixed toxic gas cleaning structure comprises a collecting tank, a purification box and an air pump;

[0015] The purification box is fixedly installed above the top plate, two exhaust pipes are fixedly connected to the bottom end of the purification box, the two collecting tanks are fixedly installed on the inner top end of the sealing cover, the top ends of the two collecting tanks are connected to the lower ends of the exhaust pipes, two control valves are fixedly installed on the outer sides of the two exhaust pipes, the exhaust pump is fixedly installed inside the purification box, multiple interlayers are fixedly installed on both sides of the purification box, and filter layers are fixedly installed on the inner sides of the multiple interlayers.

[0016] Preferably, two exhaust holes are fixedly opened on both sides of the outer wall of the purification box, the inner sides of the two exhaust holes are arranged opposite to the outer side of the interlayer, and the bottom end of the vacuum pump is arranged opposite to the top end of the vacuum pipe.

[0017] Preferably, the inner side of the sealing cover is arranged opposite to the top of the mixing tank, and the top plate and the bottom plate are parallel to each other.

[0018] Advantages of the utility model:

[0019] 1. The utility model uses a hydraulic cylinder to pull the top plate downward, and the falling top plate can push the connecting plates on both sides to fall until the connecting plates buckle the sealing cover on the top of the mixing tank, so that the sealing cover and the sealing ring fit together, and the motor drives the stirring rod to rotate. The stirring rod uses multiple stirring blades on the outside to mix the chemicals in the mixing tank, which can reduce the toxic gases generated after the mixing of toxic and harmful chemical reagents to harm operators or corrode surrounding facilities, and reduce the use cost of the reagent mixing device for analytical chemistry.

[0020] 2. First, when the plug-in block moves downward, the beveled edges on both sides of the plug-in block will push the docking ball to slide backward, so that the docking ball will compress and push the spring rod to shrink and squeeze backward until the beveled edge leaves the docking ball, and the docking ball is aligned with the docking slot. At this time, the pressure that pushes the spring rod to shrink is released to push the docking ball forward to insert into the docking slot. When the docking block needs to be disassembled to disassemble the mixing tank, the operator pulls the two pull blocks in reverse to slide backward along the slide slot. The plug-in disassembly structure can achieve a quick disassembly and installation process, thereby improving the ease of use of the reagent mixing device for analytical chemistry. Description of the drawings:

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 This is a schematic diagram of the three-dimensional structure of a reagent mixing device for analytical chemistry according to an embodiment of the utility model;

[0023] Figure 2 A reagent mixing device for analytical chemistry according to an embodiment of the utility model Figure 1 Middle front section structural diagram;

[0024] Figure 3 A reagent mixing device for analytical chemistry according to an embodiment of the utility model Figure 1 The schematic diagram of the structure is a side view on the middle right side;

[0025] Figure 4 A reagent mixing device for analytical chemistry according to an embodiment of the utility model Figure 2 Schematic diagram of the cross-sectional structure of part A in the middle.

[0026] Figure 5 A reagent mixing device for analytical chemistry according to an embodiment of the utility model Figure 2 A schematic diagram of the cross-sectional structure of the middle B part;

[0027] Figure 6 A reagent mixing device for analytical chemistry according to an embodiment of the utility model Figure 2 Schematic diagram of the cross-sectional structure of the middle C part.

[0028] In the figure: 1, bottom plate, 2, mixing tank, 3, top plate, 4, analytical chemical reagent sealed mixing structure, 41, sealing cover, 42, sealing ring, 43, motor, 44, stirring rod, 45, stirring blade, 46, hydraulic cylinder, 47, connecting plate, 5, toxic chemical reagent mixed with toxic gas cleaning structure, 51, collecting tank, 52, suction pipe, 53, control valve, 54, purification box, 55, suction pump, 56, interlayer, 57, filter layer, 6, exhaust hole, 7, mixing device easy plug-in structure, 71, connecting seat, 72, plug-in block, 73, docking groove, 74, docking ball, 75, push spring rod, 76, pull block, 8, anti-wear layer, 9, slide groove. Specific implementation method:

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] See also Figure 1-6, a reagent mixing device for analytical chemistry, comprising a bottom plate 1, a mixing tank 2 and a top plate 3, wherein an analytical chemical reagent sealing mixing structure 4 is arranged below the top plate 3, wherein the analytical chemical reagent sealing mixing structure 4 comprises a sealing ring 42, a hydraulic cylinder 46 and a connecting plate 47, wherein two connecting plates 47 are fixedly mounted below the top plate 3, wherein a sealing cover 41 is fixedly mounted at the bottom end of the connecting plate 47, wherein the sealing cover 41 is made of a stainless steel metal cover with a rubber layer on the inner side, wherein a motor 43 is fixedly mounted at the top end of the sealing cover 41, wherein when selecting the model of the motor 43, a motor model that can meet the use requirements can be selected, wherein a stirring rod 44 is fixedly mounted at the lower end of the output shaft of the motor 43, wherein the motor 43 is started by connecting a power source, and the motor 43 drives the stirring rod 44 to rotate, and the stirring rod 44 uses a plurality of stirring blades 45 on the outer side to mix the chemical reagents inside the mixing tank 2;

[0031] After the chemical reagents to be mixed are poured into the mixing tank 2, the mixing tank 2 is installed above the bottom plate 1, and the power is connected to start the hydraulic cylinder 46. The hydraulic cylinder 46 will pull the top plate 3 downward to fall, and the falling top plate 3 can push the connecting plates 47 on both sides to fall until the connecting plates 47 buckle the sealing cover 41 on the top of the mixing tank 2, so that the sealing cover 41 and the sealing ring 42 fit together, and the mixing tank 2 below can be sealed. The outer wall of the stirring rod 44 is fixedly installed with multiple stirring blades 45, and two hydraulic cylinders 46 are fixedly installed on both sides above the bottom plate 1, and the sealing ring 42 is fixedly sleeved on the top of the outer wall of the mixing tank 2;

[0032] The sealing cover 41 is made of a stainless steel metal cover with a circle of rubber layer on the inner side. After the chemical reagents to be mixed are poured into the mixing tank 2, the mixing tank 2 is installed on the top of the bottom plate 1, and the power is connected to start the hydraulic cylinder 46. The hydraulic cylinder 46 will pull the top plate 3 downward to fall. The falling top plate 3 can push the connecting plates 47 on both sides to fall until the connecting plates 47 buckle the sealing cover 41 on the top of the mixing tank 2. In this way, the sealing cover 41 and the sealing ring 42 fit together, and a sealed environment can be formed for the mixing tank 2 below. The power is connected to start the motor 43, and the motor 43 drives the stirring rod 44 to rotate. The stirring rod 44 uses multiple stirring blades 45 on the outside to mix the chemical reagents inside the mixing tank 2. The structure of stirring and mixing chemical reagents in a sealed state can reduce the toxic gas generated after the toxic and harmful chemical reagents are mixed to harm the operators or corrode the surrounding facilities, thereby reducing the use cost of the reagent mixing device for analytical chemistry.

[0033] The outer side of the sealing ring 42 is movably connected to the inner side of the sealing cover 41, the top ends of the two hydraulic cylinders 46 are fixedly connected to the lower sides of the top plate 3, the two hydraulic cylinders 46 are arranged parallel to each other, and the bottom end of the stirring rod 44 is fixedly installed with an anti-wear layer 8. The anti-wear layer 8 is made of stainless steel metal with a smooth surface and low friction. The anti-wear layer 8 is arranged at the bottom end of the stirring rod 44. When the stirring rod 44 rotates inside the mixing tank 2, the bottom end of the stirring rod 44 can reduce wear and increase service life, and the lower end of the anti-wear layer 8 is arranged relative to the inner bottom end of the mixing tank 2.

[0034] See also Figure 1-6 The mixing device is provided on the top of the bottom plate 1 for facilitating the insertion structure 7. The mixing device is provided for facilitating the insertion structure 7, which includes a connecting seat 71, a plug-in block 72 and a pull block 76. The connecting seat 71 is fixedly installed on the top of the bottom plate 1. The plug-in block 72 is movably connected to the inner side of the connecting seat 71. The plug-in block 72 will be installed on the top of the connecting seat 71 with the upper mixing tank 2. The side wall of the plug-in block 72 is fixedly installed with two docking grooves 73. The docking groove 73 is designed as a right-angled trapezoid, and the hypotenuse of the right-angled trapezoid faces downward. In this way, when the plug-in block 72 moves downward, the hypotenuses on both sides of the plug-in block 72 will push the docking ball 74 to slide backward. In this way, the docking ball 74 will compress and push the spring rod 75 to shrink and squeeze backward until the hypotenuse leaves the docking ball 74, and the position of the docking ball 74 is aligned with the docking groove 73. At this time, the pressure that pushes the spring rod 75 to shrink is released, pushing the docking ball 74 forward to insert into the docking groove 73, thereby realizing installation locking;

[0035] The two ends of the two pushing spring rods 75 are fixedly installed on the two sides of the interior of the connecting seat 71, and the ends of the two pushing spring rods 75 are fixedly installed with docking balls 74, and the docking balls 74 are movably connected to the inner sides of the docking grooves 73. The two pull blocks 76 are fixedly installed on the outer walls of the docking balls 74. The outer wall of the connecting seat 71 is fixedly provided with two sliding grooves 9. The sliding grooves 9 are arranged on the outer sides of the connecting seat 71. The pull blocks 76 and the sliding grooves 9 can slide back and forth. When it is necessary to disassemble the docking block 72 to disassemble the mixing tank 2, the operator pulls the two pull blocks 76 in the opposite direction to slide backward along the sliding grooves 9, and the pull blocks 76 then drive the inner docking balls 74 to leave the position of the docking grooves 73. At this time, the mixing tank 2 loses its restriction and can be directly pulled out for disassembly and cleaning. The inner sides of the two sliding grooves 9 are slidably connected to the side walls of the two pull blocks 76, and the bottom end of the mixing tank 2 is arranged opposite to the top of the connecting seat 71, and the bottom end of the mixing tank 2 is fixedly connected to the top of the plug-in block 72;

[0036] The plug-in block 72 will be installed on the top of the connecting seat 71 with the upper mixing tank 2. The docking groove 73 is designed as a right-angled trapezoid, and the hypotenuse of the right-angled trapezoid faces downward. In this way, when the plug-in block 72 moves downward, the hypotenuses on both sides of the plug-in block 72 will push the docking ball 74 to slide backward, so that the docking ball 74 will compress and push the spring rod 75 to shrink and squeeze backward until the hypotenuse leaves the docking ball 74, and the position of the docking ball 74 is aligned with the docking groove 73. At this time, the pressure that pushes the spring rod 75 to shrink is released, pushing the docking ball 74 forward to insert into the docking groove 73, so as to achieve installation locking;

[0037] The slide groove 9 is arranged on the outside of the connecting seat 71, and the lever block 76 and the slide groove 9 can slide back and forth. When it is necessary to remove the docking block 72 to disassemble the mixing tank 2, the operator pulls the two lever blocks 76 in opposite directions to slide backward along the slide groove 9, and the lever block 76 then drives the inner docking ball 74 to leave the position of the docking groove 73. At this time, the mixing tank 2 loses its restriction and can be directly pulled out for disassembly and cleaning. The plug-in disassembly structure can achieve a quick disassembly and installation process, thereby improving the ease of use of the reagent mixing device for analytical chemistry.

[0038] See also Figure 1-6 , a toxic chemical reagent mixed toxic gas cleaning structure 5 is provided above the top plate 3, and the toxic chemical reagent mixed toxic gas cleaning structure 5 includes a collecting tank 51, a purification box 54 and an air pump 55. The purification box 54 is fixedly installed above the top plate 3, and two air extraction pipes 52 are fixedly connected to the bottom end of the purification box 54. The air extraction pipes 52 are used to suck out other gases produced by the mixing of chemical reagents. The two collecting tanks 51 are fixedly installed on the inner top of the sealing cover 41, and the tops of the two collecting tanks 51 are connected to the lower ends of the air extraction pipes 52. The collecting tanks 51 can effectively serve the purpose of conveying gas. Two control valves 53 are fixedly installed on the outer sides of the two air extraction pipes 52. The control valves 53 can facilitate the simple and intuitive control of the degree of gas conveyance of the air extraction pipes 52, and the air extraction pump 55 is fixedly installed inside the purification box 54;

[0039] The vacuum pump 55 will start after being connected to the power supply, and the harmful gas flowing through the vacuum pipe 52 is transported to the inside of the purification box 54 through the vacuum pump 55. Multiple interlayers 56 are fixedly installed on both sides of the purification box 54. The interlayer 56 is made of a stainless steel metal frame. The multiple interlayers 56 are arranged inside the purification box 54. The interlayer 56 mainly plays the role of supporting the filter layer 57. The filter layer 57 is made of activated carbon fiber with strong adsorption capacity. Dust and toxic gases entering the purification box are purified through the filter layer 57. The filter layer 57 is fixedly installed on the inner side of the multiple interlayers 56.

[0040] Two exhaust holes 6 are fixedly opened on both sides of the outer wall of the purification box 54. The clean gas processed by the purification box 75 will be discharged along the exhaust holes 6 on both sides. The inner sides of the two exhaust holes 6 are arranged opposite to the outer side of the interlayer 56, the bottom end of the vacuum pump 55 is arranged opposite to the top end of the vacuum pipe 52, the inner side of the sealing cover 41 is arranged opposite to the top of the mixing tank 2, and the top plate 3 and the bottom plate 1 are parallel to each other.

[0041] Working principle:

[0042] After using the analytical chemistry reagent mixing device to mix and prepare various chemical reagents in the chemical laboratory, when performing chemical reagent analysis operations:

[0043] Sealed tank mixing structure of reagent mixing device for analytical chemistry:

[0044] The sealing cover 41 is made of a stainless steel metal cover with a rubber layer on the inner side. After the chemical reagents to be mixed are poured into the mixing tank 2, the mixing tank 2 is installed on the bottom plate 1, and the power is connected to start the hydraulic cylinder 46. The hydraulic cylinder 46 will pull the top plate 3 downward, and the falling top plate 3 can push the connecting plates 47 on both sides to fall until the connecting plates 47 buckle the sealing cover 41 on the top of the mixing tank 2. In this way, the sealing cover 41 and the sealing ring 42 fit together, and the mixing tank 2 below can form a sealed environment;

[0045] Connect the power supply to start the motor 43, the motor 43 will drive the stirring rod 44 to rotate, and the stirring rod 44 uses the multiple stirring blades 45 on the outside to mix the chemical reagents in the mixing tank 2. The structure of stirring and mixing chemical reagents in a sealed state can reduce the toxic gas generated by the mixing of toxic and harmful chemical reagents to harm operators or corrode surrounding facilities;

[0046] Chemical mixing reaction harmful gas purification structure of reagent mixing device for analytical chemistry:

[0047] The plug-in block 72 will be installed on the top of the connecting seat 71 with the upper mixing tank 2. The docking groove 73 is designed as a right-angled trapezoid, and the hypotenuse of the right-angled trapezoid faces downward. In this way, when the plug-in block 72 moves downward, the hypotenuses on both sides of the plug-in block 72 will push the docking ball 74 to slide backward, so that the docking ball 74 will compress and push the spring rod 75 to shrink and squeeze backward until the hypotenuse leaves the docking ball 74, and the position of the docking ball 74 is aligned with the docking groove 73. At this time, the pressure that pushes the spring rod 75 to shrink is released, pushing the docking ball 74 forward to insert into the docking groove 73, so as to achieve installation locking;

[0048] The lever block 76 and the slide groove 9 can slide back and forth. When it is necessary to remove the docking block 72 to disassemble the mixing tank 2, the operator pulls the two lever blocks 76 in reverse to slide backward along the slide groove 9, and the lever block 76 then drives the inner docking ball 74 to leave the position of the docking groove 73. At this time, the mixing tank 2 loses its restriction and can be directly pulled out for disassembly and cleaning. The exhaust pipe 52 is used to absorb and discharge other substances produced by the mixing of chemical reagents. The collecting tank 51 can effectively serve the purpose of conveying gas. The control valve 53 can facilitate the simple and intuitive control of the degree of gas conveyance of the exhaust pipe 52. The interlayer 56 is made of a stainless steel metal frame, and multiple interlayers 56 are arranged inside the purification box 54. The interlayer 56 mainly supports the filter layer 57. The filter layer 57 is made of activated carbon fiber with strong adsorption capacity. The dust and toxic gases entering the purification box are purified through the filter layer 57.

[0049] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A reagent mixing device for analytical chemistry, comprising a bottom plate (1), a mixing tank (2) and a top plate (3), characterized in that: A sealed mixing structure (4) for analytical chemical reagents is provided below the top plate (3). The sealed mixing structure (4) for analytical chemical reagents comprises a sealing ring (42), a hydraulic cylinder (46) and a connecting plate (47). The two connecting plates (47) are fixedly mounted below the top plate (3). A sealing cover (41) is fixedly mounted at the bottom end of the connecting plate (47). A motor (43) is fixedly mounted at the top end of the sealing cover (41). A stirring rod (44) is fixedly mounted at the lower end of the output shaft of the motor (43). A plurality of stirring blades (45) are fixedly mounted on the outer wall of the stirring rod (44). The two hydraulic cylinders (46) are fixedly mounted on both sides above the bottom plate (1). The sealing ring (42) is fixedly sleeved on the top end of the outer wall of the mixing tank (2).

2. The reagent mixing device for analytical chemistry according to claim 1, characterized in that: The outer side of the sealing ring (42) is movably connected to the inner side of the sealing cover (41), the top ends of the two hydraulic cylinders (46) are fixedly connected to the lower sides of the top plate (3), and the two hydraulic cylinders (46) are arranged parallel to each other.

3. The reagent mixing device for analytical chemistry according to claim 1, characterized in that: An anti-wear layer (8) is fixedly mounted on the bottom end of the stirring rod (44), and the lower end of the anti-wear layer (8) is arranged opposite to the inner bottom end of the mixing tank (2).

4. The reagent mixing device for analytical chemistry according to claim 1, characterized in that: A mixing device is provided above the bottom plate (1) to facilitate the insertion of the structure (7); The mixing device plug-in structure (7) comprises a connection seat (71), a plug-in block (72) and a pull block (76); The connecting seat (71) is fixedly mounted above the bottom plate (1); a plug-in block (72) is movably connected to the inner side of the connecting seat (71); two docking grooves (73) are fixedly mounted on the side wall of the plug-in block (72); two pushing spring rods (75) are fixedly mounted on both sides of the interior of the connecting seat (71); docking balls (74) are fixedly mounted at the ends of the two pushing spring rods (75); the docking balls (74) are movably connected to the inner side of the docking grooves (73); and the two pull blocks (76) are fixedly mounted on the outer wall of the docking balls (74).

5. The reagent mixing device for analytical chemistry according to claim 4, characterized in that: The outer wall of the connecting seat (71) is fixedly provided with two slide grooves (9), the inner sides of the two slide grooves (9) are slidably connected to the side walls of the two pull blocks (76), the bottom end of the mixing tank (2) is arranged opposite to the top of the connecting seat (71), and the bottom end of the mixing tank (2) is fixedly connected to the top of the plug-in block (72).

6. The reagent mixing device for analytical chemistry according to claim 1, characterized in that: A toxic chemical reagent mixed with poisonous gas cleaning structure (5) is provided above the top plate (3); The toxic chemical reagent mixed with toxic gas cleaning structure (5) comprises a collecting tank (51), a purification box (54) and an air pump (55); The purification box (54) is fixedly installed above the top plate (3), and two exhaust pipes (52) are fixedly connected to the bottom end of the purification box (54). The two collecting tanks (51) are fixedly installed on the inner top end of the sealing cover (41), and the top ends of the two collecting tanks (51) are connected to the lower ends of the exhaust pipes (52). Two control valves (53) are fixedly installed on the outer sides of the two exhaust pipes (52). The exhaust pump (55) is fixedly installed inside the purification box (54). Multiple interlayers (56) are fixedly installed on both sides of the purification box (54), and filter layers (57) are fixedly installed on the inner sides of the multiple interlayers (56).

7. The reagent mixing device for analytical chemistry according to claim 6, characterized in that: Two exhaust holes (6) are fixedly provided on both sides of the outer wall of the purification box (54), the inner sides of the two exhaust holes (6) are arranged opposite to the outer side of the interlayer (56), and the bottom end of the air pump (55) is arranged opposite to the top end of the air extraction pipe (52).

8. The reagent mixing device for analytical chemistry according to claim 1, characterized in that: The inner side of the sealing cover (41) is arranged opposite to the top of the mixing tank (2), and the top plate (3) and the bottom plate (1) are parallel to each other.

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