Sampling devices for chemical engineering

Abstract

This utility model discloses a sampling device for chemical engineering, including a placement platform and a sampling mechanism. The placement platform is used to place a container containing the liquid to be sampled. An adjusting component is movably connected to the placement platform, and the sampling mechanism is connected to the adjusting component. The placement platform is equipped with a rotatable adjusting knob, and a transmission structure is provided between the adjusting knob and the adjusting component. When the adjusting knob is rotated, the transmission structure drives the adjusting component to rotate or move relative to the placement platform, thereby correspondingly driving the sampling mechanism to rotate or move relative to the placement platform. This utility model allows the position of the sampling mechanism relative to the sample container to be sampled by operating the adjusting knob, enabling the sampling of liquid from different locations, improving adaptability, and increasing the number of sampling points, which is beneficial for obtaining representative samples and ensuring sampling accuracy.

Description

Technical Field

[0001] This utility model relates to the field of chemical engineering technology, and in particular to a sampling device for chemical engineering. Background Technology

[0002] Sampling devices are crucial equipment in industrial production and scientific research experiments for accurately obtaining representative samples. In existing technologies, sampling devices typically include a sampling mechanism, a collection mechanism, and a support. Some existing sampling devices have relatively simple structures, with the sampling and collection mechanisms usually fixedly mounted on the support. The sampling mechanism draws liquid through a nozzle and transports the liquid to a container in the collection device via a conduit to achieve liquid sampling. Because the sampling mechanism is relatively fixed, it is difficult to adapt to sampling needs at different locations or container depths, resulting in poor adaptability. When the medium is unevenly distributed, the single sampling point makes it difficult to obtain representative samples, affecting sampling accuracy. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a sampling device for chemical engineering, which can drive the sampling mechanism to move relative to the placement platform by adjusting a knob, thereby enabling the aspiration of liquid samples from different locations, improving adaptability, increasing the number of sampling points, facilitating the acquisition of representative samples, and ensuring sampling accuracy.

[0004] The sampling device for chemical engineering according to the embodiments of this utility model includes a placement platform and a sampling mechanism. The placement platform is used to place a container containing a liquid to be sampled. An adjusting component is movably connected to the placement platform. The sampling mechanism is connected to the adjusting component. The placement platform is provided with a rotatable adjusting knob. A transmission structure is provided between the adjusting knob and the adjusting component, and the transmission structure drives the adjusting component to rotate or move relative to the placement platform when the adjusting knob is rotated, thereby driving the sampling mechanism to rotate or move relative to the placement platform accordingly.

[0005] The sampling device for chemical engineering according to the embodiments of this utility model has at least the following beneficial effects: In use, a container containing the liquid to be sampled is placed on the placement platform, and the sampling mechanism is partially inserted into the liquid to be sampled. By operating the adjustment knob, the adjustment knob drives the adjustment component to rotate or move relative to the placement platform through the transmission structure, thereby driving the sampling mechanism to rotate or move relative to the placement platform, thereby adjusting and changing the position of the sampling mechanism relative to the container to be sampled, so as to realize the sampling of the liquid to be sampled at different positions, improve adaptability, and increase the number of sampling points, which is conducive to obtaining representative samples and ensuring the accuracy of sampling.

[0006] According to some embodiments of the present invention, the adjustment knob can drive the adjustment member to rotate relative to the placement platform through the transmission structure and drive the sampling mechanism to rotate relative to the placement platform.

[0007] According to some embodiments of this utility model, the adjusting member has a rod-shaped structure and extends longitudinally. The adjusting member is rotatably connected to the placement platform. The transmission structure includes a first rotating shaft and a second rotating shaft. The first rotating shaft is rotatably connected to the placement platform and is provided with a first transmission tooth. The second rotating shaft is connected to the adjusting member and is provided with a second transmission tooth. The first transmission tooth meshes with the second transmission tooth. The adjusting knob is connected to the first rotating shaft and can drive the first rotating shaft to rotate. The first rotating shaft can drive the second rotating shaft and the adjusting member to rotate through the meshing of the first transmission tooth and the second transmission tooth.

[0008] According to some embodiments of this utility model, the adjustment knob is located on the side of the placement platform, the rotation axis of the first rotating shaft is parallel to the horizontal direction, the rotation axis of the second rotating shaft is parallel to the vertical direction, the placement platform is provided with a support base corresponding to the second rotating shaft, the support base is provided with a bearing, the upper end of the second rotating shaft is connected to the adjustment component, and the lower end of the second rotating shaft cooperates with the bearing.

[0009] According to some embodiments of the present invention, the sampling device for chemical engineering further includes a collection mechanism, which is connected to the adjusting member. When the adjusting member rotates relative to the placement platform, the collection mechanism and the sampling mechanism rotate together with the adjusting member.

[0010] According to some embodiments of the present invention, the sampling mechanism includes a first connecting frame, a suction cylinder, a pull rod, and a guide tube. The first connecting frame is connected to the adjusting member. The suction cylinder is fixedly mounted on the first connecting frame and has a suction nozzle on its lower side. The pull rod is movable up and down and connected to the first connecting frame. The lower end of the pull rod is inserted into the suction cylinder and has a piston that cooperates with the suction cylinder. One end of the guide tube is connected to the suction cylinder, and the other end is provided corresponding to the collection mechanism. A fixing block is provided on the side wall of the suction cylinder, and the fixing block is connected to the guide tube to limit the position of the guide tube.

[0011] According to some embodiments of the present invention, the collecting mechanism includes a second connecting frame, a support plate, and a collector. The second connecting frame is connected to the adjusting member and is provided with a limiting plate. The support plate is fixedly connected to the second connecting frame and is located below the limiting plate. The limiting plate is provided with a limiting hole that matches the outer contour of the collector. The collector can pass through the limiting hole longitudinally and be placed on the support plate.

[0012] According to some embodiments of the present invention, the adjusting member has a rod-shaped structure and extends longitudinally. A longitudinal position adjustment structure is provided between the sampling mechanism and the adjusting member and is connected through the longitudinal position adjustment structure. The sampling mechanism can adjust the connection position relative to the adjusting member by moving longitudinally through the longitudinal position adjustment structure.

[0013] According to some embodiments of the present invention, the longitudinal position adjustment structure includes an adjustment sleeve and a locking member. The adjustment sleeve is fixedly connected to the sampling mechanism. The adjustment member passes through the adjustment sleeve longitudinally, allowing the adjustment sleeve to move up and down along the adjustment member. The locking member is connected to the adjustment sleeve and can restrict or release the movement of the adjustment sleeve along the adjustment member.

[0014] According to some embodiments of the present invention, the locking member is a bolt and threadedly connected to the side of the adjusting sleeve. The locking member can be threadedly engaged with the adjusting sleeve, so that the end of the locking member can move to abut against or release from the adjusting member.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0017] Figure 1 This is a schematic diagram of the sampling device used in chemical engineering according to an embodiment of the present invention;

[0018] Figure 2 for Figure 1 A schematic diagram of the sampling device from another perspective;

[0019] Figure 3 for Figure 1 A partial structural diagram of the sampling device;

[0020] Figure 4 for Figure 1 A schematic diagram of the cross-sectional structure of the sampling device.

[0021] Figure label:

[0022] Placement platform 100, adjusting component 110, adjusting knob 120, first rotating shaft 130, first transmission gear 131, second rotating shaft 140, second transmission gear 141, support base 150, bearing 151, adjusting sleeve 160, locking component 170;

[0023] Sampling mechanism 200, first connecting frame 210, suction cylinder 220, suction nozzle 221, fixing block 222, pull rod 230, piston 231, guide tube 240;

[0024] The collection mechanism 300, the limiting hole 301, the second connecting frame 310, the limiting plate 311, the supporting plate 320, and the collector 330. Detailed Implementation

[0025] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0026] In the description of this utility model, it should be understood that if directional descriptions are involved, such as up, down, front, back, left, right, etc., indicating the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings, it is only for the convenience of describing this utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0027] In the description of this utility model, if words such as several, greater than, less than, exceeding, above, below, or within appear, several means one or more, multiple means two or more, greater than, less than, exceeding, etc. are understood to exclude the number itself, and above, below, or within are understood to include the number itself.

[0028] If the terms "first" and "second" are used only to distinguish technical features, they should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features indicated, or implicitly indicating the order of the technical features indicated.

[0029] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0030] Reference Figure 1 , Figure 3 and Figure 4A sampling device for chemical engineering includes a placement platform 100 and a sampling mechanism 200. The placement platform 100 is used to place a container containing a liquid to be sampled. An adjusting member 110 is movably connected to the placement platform 100. The sampling mechanism 200 is connected to the adjusting member 110. The placement platform 100 is provided with a rotatable adjusting knob 120. A transmission structure is provided between the adjusting knob 120 and the adjusting member 110 and the transmission structure is used for transmission connection. When the adjusting knob 120 is rotated, the transmission structure can drive the adjusting member 110 to rotate or move relative to the placement platform 100, so as to correspondingly drive the sampling mechanism 200 to rotate or move relative to the placement platform 100.

[0031] Understandably, such as Figure 1 , Figure 3 and Figure 4 As shown, in use, a container containing the liquid to be sampled can be placed on the placement platform 100, so that part of the sampling mechanism 200 extends into the liquid to be sampled. By operating the adjustment knob 120, the adjustment knob 120 drives the adjustment component 110 to rotate or move relative to the placement platform 100 through the transmission structure, thereby driving the sampling mechanism 200 to rotate or move relative to the placement platform 100, thereby adjusting and changing the position of the sampling mechanism 200 relative to the container to be sampled, so as to realize the sampling of the liquid to be sampled at different positions, improve adaptability, and increase the number of sampling points, so as to obtain representative samples and ensure the accuracy of sampling.

[0032] In practical applications, the specific structural form of the transmission structure can be set according to the actual needs of use. It will not be described in detail here, but will be explained in detail below.

[0033] In some embodiments, the adjustment knob 120 can drive the adjustment member 110 to rotate relative to the placement stage 100 through a transmission structure, thereby causing the sampling mechanism 200 to rotate relative to the placement stage 100.

[0034] Understandably, during use, the adjusting element 110 rotates to drive the sampling mechanism 200 to rotate relative to the placement stage 100, thereby adjusting and changing the sampling position of the sampling mechanism 200 relative to the placement stage 100. Both the adjusting knob 120 and the adjusting element 110 rotate, and their transmission structure is relatively simple and easy to use. In practical applications, in addition to rotation, the adjusting element 110 can also be slidably connected to the placement stage 100. In this case, the transmission structure between the adjusting knob 120 and the adjusting element 110 can be a gear and rack transmission structure or a lead screw transmission structure, so that the rotation of the adjusting knob 120 is converted into the movement of the adjusting element 110. The specific configuration can be set according to the actual usage requirements.

[0035] In some embodiments, the adjusting member 110 has a rod-like structure and extends longitudinally. The adjusting member 110 is rotatably connected to the placement platform 100. The transmission structure includes a first rotating shaft 130 and a second rotating shaft 140. The first rotating shaft 130 is rotatably connected to the placement platform 100 and is provided with a first transmission tooth 131. The second rotating shaft 140 is connected to the adjusting member 110 and is provided with a second transmission tooth 141. The first transmission tooth 131 and the second transmission tooth 141 mesh. The adjusting knob 120 is connected to the first rotating shaft 130 and can drive the first rotating shaft 130 to rotate. The first rotating shaft 130 can drive the second rotating shaft 140 and the adjusting member 110 to rotate through the meshing of the first transmission tooth 131 and the second transmission tooth 141.

[0036] Understandably, such as Figure 3 and Figure 4 As shown, in use, rotating the adjustment knob 120 drives the first rotating shaft 130 to rotate. Through the meshing of the first transmission gear 131 and the second transmission gear 141, the first rotating shaft 140 rotates, causing the adjusting element 110 to rotate together with the second rotating shaft 140. This achieves transmission between the adjustment knob 120 and the adjusting element 110. The structure is simple, the gear transmission is stable and reliable, and it is easy to use. In practical applications, in addition to the above structure, the adjustment knob 120 and the adjusting element 110 can also be driven by a synchronous belt pulley transmission structure, a sprocket and chain transmission structure, etc., depending on the actual usage requirements.

[0037] In some embodiments, the adjustment knob 120 is located on the side of the placement platform 100, the rotation axis of the first rotating shaft 130 is parallel to the horizontal direction, the rotation axis of the second rotating shaft 140 is parallel to the vertical direction, the placement platform 100 is provided with a support base 150 corresponding to the second rotating shaft 140, the support base 150 is provided with a bearing 151, the upper end of the second rotating shaft 140 is connected to the adjustment member 110, and the lower end of the second rotating shaft 140 is engaged with the bearing 151.

[0038] Understandably, such as Figure 1 , Figure 3 and Figure 4As shown, the adjustment knob 120 is located on the right side of the placement platform 100. The rotation axis of the first rotating shaft 130 is parallel to the left-right direction, and the rotation axis of the second rotating shaft 140 is parallel to the up-down direction. The first transmission gear 131 and the second transmission gear 141 are both bevel gears and mesh with each other. The placement platform 100 is provided with a support base 150 on the lower side of the second rotating shaft 140. The upper end of the second rotating shaft 140 is connected to the adjustment member 110, and the lower end of the second rotating shaft 140 is engaged with the bearing 151 of the support base 150. The bearing 151 forms a support structure with the second rotating shaft 140 and the adjustment member 110, which allows the second rotating shaft 140 to rotate stably under the cooperation of the bearing 151, which is beneficial to improving the rotational stability of the adjustment member 110. In practical applications, the rotation axis of the first rotating shaft 130 and the rotation axis of the second rotating shaft 140 can be parallel to each other. For example, both can be parallel to the vertical direction, i.e., the adjustment knob 120 is located on the upper side of the placement platform 100. Of course, in addition to gear meshing transmission, the first rotating shaft 130 and the second rotating shaft 140 can also be connected by a coupling. The specific settings can be made according to the actual needs of use.

[0039] In some embodiments, the sampling device for chemical engineering further includes a collection mechanism 300, which is connected to an adjustment member 110. When the adjustment member 110 rotates relative to the placement platform 100, the collection mechanism 300 and the sampling mechanism 200 rotate together with the adjustment member 110.

[0040] Understandably, such as Figure 1 , Figure 2 and Figure 4 As shown, since both the collection mechanism 300 and the sampling mechanism 200 are connected to the adjusting member 110, when the adjusting member 110 rotates relative to the placement platform 100, the collection mechanism 300 and the sampling mechanism 200 will rotate together with the adjusting member 110. This keeps the relative positions of the collection mechanism 300 and the sampling mechanism 200 unchanged, which is beneficial for transporting the sampled liquid to the collection mechanism 300 for collection and for easy use. In practical applications, the collection mechanism 300 can also be fixedly connected to the sampling mechanism 200, depending on the actual usage requirements.

[0041] In some embodiments, the sampling mechanism 200 includes a first connecting frame 210, a suction cylinder 220, a pull rod 230, and a conduit 240. The first connecting frame 210 is connected to the adjusting member 110. The suction cylinder 220 is fixedly mounted on the first connecting frame 210 and has a suction nozzle 221 on its lower side. The pull rod 230 is movable up and down and connected to the first connecting frame 210. The lower end of the pull rod 230 is inserted into the suction cylinder 220 and has a piston 231 that cooperates with the suction cylinder 220. One end of the conduit 240 is connected to the suction cylinder 220, and the other end is disposed corresponding to the collection mechanism 300. A fixing block 222 is provided on the side wall of the suction cylinder 220. The fixing block 222 is connected to the conduit 240 and is used to limit the position of the conduit 240.

[0042] Understandably, such as Figure 1 , Figure 2 and Figure 4 As shown, the first connecting frame 210 is connected to the adjusting member 110. The suction cylinder 220 is fixedly mounted on the first connecting frame 210, and a suction nozzle 221 is provided on the lower side of the suction cylinder 220. The pull rod 230 is movable up and down and connected to the first connecting frame 210. Its lower end is inserted into the suction cylinder 220 and is provided with a piston 231 that cooperates with the suction cylinder 220. When in use, the suction nozzle 221 contacts the liquid to be sampled. The piston 231 can be moved by the up and down movement of the pull rod 230, so that the suction cylinder 220 can draw liquid from the sampling container through the suction nozzle 221. One end of the conduit 240 is connected to the suction cylinder 220, and the other end is set to the collection mechanism 300. When in use, the liquid drawn in the suction cylinder 220 can be transported to the collection mechanism 300 through the conduit 240. A fixing block 222 is provided on the side wall of the suction cylinder 220 and is connected to the middle of the conduit 240 through the fixing block 222 to limit the position of the conduit 240 and improve the stability of the connection of the conduit 240.

[0043] In practical applications, valves can be installed at the nozzle 221 and the connection between the tubing 240 and the suction cylinder 220 to control their opening and closing. For example, when suctioning, the nozzle 221 is open and the tubing 240 is closed; when infusion, the nozzle 221 is closed and the tubing 240 is open. These are known to those skilled in the art. The valve can be a one-way valve or a switching valve to switch the opening and closing states of the nozzle 221 and the tubing 240. The specific settings can be made according to actual usage needs.

[0044] In some embodiments, the collecting mechanism 300 includes a second connecting frame 310, a support plate 320, and a collector 330. The second connecting frame 310 is connected to the adjusting member 110 and is provided with a limiting plate 311. The support plate 320 is fixedly connected to the second connecting frame 310 and is located below the limiting plate 311. The limiting plate 311 is provided with a limiting hole 301 that matches the outline of the collector 330. The collector 330 can pass through the limiting hole 301 longitudinally and be placed on the support plate 320.

[0045] Understandably, such as Figure 1 , Figure 2 and Figure 4 As shown, the limiting plate 311 and the supporting plate 320 are spaced apart in the vertical direction, with the supporting plate 320 located below the limiting plate 311. The limiting plate 311 is connected to the adjusting member 110 via the second connecting bracket 310. The limiting plate 311 has a limiting hole 301 that matches the outer contour of the collector 330. In use, the collector 330 can pass through the limiting hole 301 longitudinally and be placed on the supporting plate 320, thus achieving detachable and stable placement of the collector 330. Its structure is simple and easy to use. In practical applications, the specific structural form of the collecting mechanism 300 can also be changed according to actual usage needs.

[0046] In some embodiments, the adjusting member 110 has a rod-shaped structure and extends longitudinally. A longitudinal position adjustment structure is provided between the sampling mechanism 200 and the adjusting member 110 and is connected through the longitudinal position adjustment structure. The sampling mechanism 200 can adjust the connection position relative to the adjusting member 110 by moving longitudinally through the longitudinal position adjustment structure.

[0047] Understandably, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the adjusting member 110 extends vertically and has a rod-like structure. A longitudinal position adjustment structure connects the sampling mechanism 200 and the adjusting member 110. During use, the longitudinal position adjustment structure allows the sampling mechanism 200 to move longitudinally relative to the adjusting member 110, adjusting the connection position. This controls the depth to which the suction nozzle 221 of the sampling mechanism 200 extends into the liquid to be sampled, facilitating sampling of liquids at different depths within the sampling container, further enhancing adaptability, increasing the number of sampling points, and thus improving the accuracy of obtaining representative samples. In practical applications, the specific structural form of the longitudinal position adjustment structure can be set according to actual usage needs, and will not be described in detail here, but will be explained in more detail below.

[0048] In some embodiments, the longitudinal position adjustment structure includes an adjustment sleeve 160 and a locking member 170. The adjustment sleeve 160 is fixedly connected to the sampling mechanism 200. The adjustment member 110 passes through the adjustment sleeve 160 longitudinally, allowing the adjustment sleeve 160 to move up and down along the adjustment member 110. The locking member 170 is connected to the adjustment sleeve 160 and can restrict or release the movement of the adjustment sleeve 160 up and down along the adjustment member 110.

[0049] Understandably, such as Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the first connecting frame 210 is fixedly connected to the adjusting sleeve 160. The adjusting member 110 passes through the adjusting sleeve 160 longitudinally, allowing the adjusting sleeve 160 to move up and down along the adjusting member 110. In use, the locking member 170 can be operated to release the restriction on the up and down movement of the adjusting sleeve 160 along the adjusting member 110, and then the adjusting sleeve 160 can be moved up and down along the adjusting member 110 to adjust and change the up and down position of the sampling mechanism 200. After adjustment, the locking member 170 can be operated to restrict the up and down movement of the adjusting sleeve 160 along the adjusting member 110, thereby fixing the adjusted position. Its structure is simple and easy to use.

[0050] In practical applications, in addition to the above structure, guide rails or guide grooves can be provided on the adjusting member 110 so that the first connecting frame 210 cooperates with the guide rails or guide grooves on the adjusting member 110, thereby realizing that the connection position between the two can be adjusted. Alternatively, multiple mounting holes or other mounting structures are provided on the adjusting member 110 at intervals along the vertical direction, so that the sampling mechanism 200 can be disassembled and moved to different mounting structures for connection to change its position. The specific changes can be made according to the actual use needs.

[0051] In some embodiments, the locking member 170 is bolted and threaded to the side of the adjusting sleeve 160. The locking member 170 can be threaded onto the adjusting sleeve 160, so that the end of the locking member 170 can move to abut against or release from the adjusting member 110.

[0052] Understandably, such as Figure 2 , Figure 3 and Figure 4 As shown, the locking element 170 is a bolt, which is threadedly connected to the rear side of the adjusting sleeve 160. In use, the locking element 170 can be loosened to separate the end of the locking element 170 from the adjusting element 110, thereby releasing the abutment and releasing the movement restriction on the adjusting sleeve 160. When position locking is required, the locking element 170 can be tightened to move the end of the locking element 170 to abut against the adjusting element 110, thereby restricting the movement of the adjusting sleeve 160. Its structure is simple, and the locking and unlocking operations are relatively convenient and easy to use.

[0053] In practical applications, in addition to the above structure, the locking member 170 can also be a pin. For example, the adjusting member 110 is provided with multiple locking holes spaced apart in the vertical direction. After the adjusting sleeve 160 moves to the preset position, the pin passes through the adjusting sleeve 160 and is inserted into the locking hole, thereby restricting the movement of the adjusting sleeve 160. The second connecting frame 310 and the adjusting member 110 can also be connected through this longitudinal position adjustment structure, thereby making the vertical position of the collecting mechanism 300 relative to the sampling mechanism 200 adjustable and changing, improving adaptability. The specific settings can be made according to the actual use needs.

[0054] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A sampling device for chemical engineering, characterized in that, include: A placement platform for placing a container filled with the liquid to be sampled, and an adjusting component is movably connected to the placement platform; The sampling mechanism is connected to the adjusting component. The placement platform is provided with a rotatable adjusting knob. A transmission structure is provided between the adjusting knob and the adjusting component, and the transmission structure drives the adjusting component to rotate or move relative to the placement platform when the adjusting knob is rotated. This, in turn, drives the sampling mechanism to rotate or move relative to the placement platform.

2. The sampling device for chemical engineering according to claim 1, characterized in that, The adjustment knob can drive the adjustment component to rotate relative to the placement platform through the transmission structure, and drive the sampling mechanism to rotate relative to the placement platform.

3. The sampling device for chemical engineering according to claim 2, characterized in that, The adjusting member has a rod-like structure and extends longitudinally. The adjusting member is rotatably connected to the placement platform. The transmission structure includes a first rotating shaft and a second rotating shaft. The first rotating shaft is rotatably connected to the placement platform and is provided with a first transmission tooth. The second rotating shaft is connected to the adjusting member and is provided with a second transmission tooth. The first transmission tooth meshes with the second transmission tooth. The adjusting knob is connected to the first rotating shaft and can drive the first rotating shaft to rotate. The first rotating shaft can drive the second rotating shaft and the adjusting member to rotate through the meshing of the first transmission tooth and the second transmission tooth.

4. The sampling device for chemical engineering according to claim 3, characterized in that, The adjustment knob is located on the side of the placement platform. The rotation axis of the first rotating shaft is parallel to the horizontal direction, and the rotation axis of the second rotating shaft is parallel to the vertical direction. The placement platform is provided with a support base corresponding to the second rotating shaft. The support base is provided with a bearing. The upper end of the second rotating shaft is connected to the adjustment component, and the lower end of the second rotating shaft is engaged with the bearing.

5. The sampling device for chemical engineering according to claim 2, characterized in that, It also includes a collection mechanism, which is connected to the adjusting member. When the adjusting member rotates relative to the placement platform, the collection mechanism and the sampling mechanism rotate together with the adjusting member.

6. The sampling device for chemical engineering according to claim 5, characterized in that, The sampling mechanism includes a first connecting frame, a suction cylinder, a pull rod, and a guide tube. The first connecting frame is connected to the adjusting component. The suction cylinder is fixedly mounted on the first connecting frame and has a suction nozzle on its lower side. The pull rod is movable up and down and connected to the first connecting frame. The lower end of the pull rod is inserted into the suction cylinder and has a piston that cooperates with the suction cylinder. One end of the guide tube is connected to the suction cylinder, and the other end is set corresponding to the collection mechanism. A fixing block is provided on the side wall of the suction cylinder, and the fixing block is connected to the guide tube to limit the position of the guide tube.

7. The sampling device for chemical engineering according to claim 5, characterized in that, The collecting mechanism includes a second connecting frame, a support plate, and a collector. The second connecting frame is connected to the adjusting member and is provided with a limiting plate. The support plate is fixedly connected to the second connecting frame and is located below the limiting plate. The limiting plate is provided with a limiting hole that matches the outer contour of the collector. The collector can pass through the limiting hole longitudinally and be placed on the support plate.

8. The sampling device for chemical engineering according to claim 2, characterized in that, The adjusting member has a rod-shaped structure and extends longitudinally. The sampling mechanism and the adjusting member are provided with a longitudinal position adjustment structure and are connected through the longitudinal position adjustment structure. The sampling mechanism can adjust the connection position relative to the adjusting member by moving longitudinally through the longitudinal position adjustment structure.

9. The sampling device for chemical engineering according to claim 8, characterized in that, The longitudinal position adjustment structure includes an adjustment sleeve and a locking member. The adjustment sleeve is fixedly connected to the sampling mechanism. The adjustment member passes through the adjustment sleeve longitudinally, allowing the adjustment sleeve to move up and down along the adjustment member. The locking member is connected to the adjustment sleeve and can restrict or release the movement of the adjustment sleeve along the adjustment member.

10. The sampling device for chemical engineering according to claim 9, characterized in that, The locking element is a bolt and threadedly connected to the side of the adjusting sleeve. The locking element can be screwed onto the adjusting sleeve thread, so that the end of the locking element can move to abut against or release from the adjusting element.

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