A solid-liquid dual-purpose sample injector for chemical experiments

Abstract

The utility model provides a solid liquid dual -purpose sampler for chemical experiment belongs to chemical apparatus technical field, solves the problem that the liquid and solid injection function are not integrated in grease detection in the prior art, need to frequently switch equipment, and the operation is complicated and low efficiency. It includes fixed base, and the fixed base top supports the pipe body along the length direction through the support plate, and the electromagnet is slidably embedded in the pipe, and the electromagnet one end is solid through connecting rod and is connected with solid sample spoon, the fixed base top is equipped with the sliding slot, and the sliding block is in, and the moving plate on the sliding block top is through the hole sleeve on the pipe body, and the inner wall of hole has the magnet, and the moving plate one end is equipped with the push rod parallel with the pipe body, and the fixed base top has the support seat with recess, and the recess is towards the push rod. The utility model discloses through the electromagnet and the magnet cooperation on the moving plate power transmission, combines independent push rod, and respectively completes solid, liquid sampling by electromagnet switch control, integrates two functions, need not to switch equipment, simplifies the operation, and promotes the efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of chemical instrument technology, specifically relating to a solid-liquid dual-purpose sampler for chemical experiments. Background Technology

[0002] In chemical laboratories, solid and liquid oil samples need to be fed into detectors via a pusher device to complete the detection and analysis of various indicators. Current technologies for pushing devices adapted to this type of sample detection have relatively limited functionality, only capable of pushing in either liquid or solid oil samples individually, and cannot meet the detection needs of samples in both states.

[0003] The detector has a syringe inlet and a solid inlet on one side, which are adapted to the injection of samples in different states: When detecting liquid oil, the syringe needs to be pushed by the pusher to make the syringe touch the syringe inlet, and then the syringe handle is pushed to inject the liquid oil into the detector; when detecting solid oil, the solid oil needs to be placed on a carrier such as a spoon, and then the carrier is pushed by another independent pusher to make the solid oil enter the detector.

[0004] The existing structure described above has significant shortcomings. The liquid injection and solid injection functions are not integrated into the same pusher device, resulting in frequent switching between different devices during the detection process, making the operation cumbersome and the detection efficiency low. At the same time, the separate setup of multiple devices increases the space occupied by the equipment and the operating cost, making it difficult to meet the efficient and convenient sample detection needs of chemical laboratories. Utility Model Content

[0005] In view of this, the present invention provides a solid-liquid dual-purpose injector for chemical experiments, which solves the problem in the prior art that the liquid injection and solid injection functions are not integrated into the same push device when detecting oils, resulting in frequent switching of different devices during the detection process, cumbersome operation procedures and low detection efficiency.

[0006] The technical solution adopted in this utility model is as follows:

[0007] A dual-purpose solid-liquid injector for chemical experiments includes a fixed base. A tube body is supported on the top of the fixed base by a support plate. The tube body is arranged along the length of the fixed base. An electromagnet is slidably embedded in the tube body. A connecting rod is provided at one end of the electromagnet, and a solid sample spoon is provided at the end of the connecting rod away from the electromagnet. A sliding groove is provided on the top of the fixed base, and a slider is slidably embedded in the groove. A movable plate is provided on the top of the slider, and a through hole is provided on the movable plate. A magnet is provided on the inner wall of the through hole. A push rod is also provided at one end of the movable plate, and the push rod is parallel to the tube body. A support base is also provided on the top of the fixed base, and a groove for placing a sample injection needle is provided on the support base, with the groove facing the push rod.

[0008] It should be noted that the tube body provides a sliding guide for the electromagnet, which is connected to an external power source via wires. When energized, it generates a magnetic force with the magnet on the moving plate. The connecting rod connects the electromagnet to the solid sample spoon and transmits power. The solid sample spoon carries the solid sample. The push rod is used to push the injection needle, and the groove of the support seat positions the injection needle. Overall working principle: For solid sample injection, the solid sample is placed in the injection spoon. The electromagnet is energized, causing it to generate a magnetic force (attraction) with the magnet in the through hole of the moving plate. The moving plate moves, and under the action of the magnetic force, the moving plate drives the electromagnet to slide along the tube body. The electromagnet drives the solid sample spoon to move through the connecting rod, pushing the solid sample to the detector. For liquid sample injection, the needle with the sample is placed in the groove. The electromagnet is turned off (no magnetic force). When the moving plate slides along the groove, it does not drive the electromagnet. It only moves itself to bring the push rod close and push the injection needle handle placed in the groove of the support seat, injecting the liquid into the detector. Overall effect: By setting up an energized electromagnet in conjunction with a magnet on a moving plate, the power transmission of the solid sample spoon is realized. Combined with an independent push rod structure, solid and liquid samples are injected separately under the control of the electromagnet switch. It integrates two functions, eliminating the need to switch equipment, simplifying operation and improving experimental efficiency.

[0009] Preferably, the slide groove is provided with a lead screw, the two ends of the lead screw are rotatably connected to the two ends of the slide groove, the slider is threadedly connected to the lead screw, and the lead screw is driven by a motor provided at one end of the fixed seat.

[0010] It should be noted that when injecting solid samples, the electromagnet is energized, the motor drives the lead screw to rotate, which in turn moves the slider and the moving plate. The moving plate moves the electromagnet and the solid sample spoon through magnetic force, thus precisely controlling the solid pushing distance. When injecting liquid samples, the electromagnet is deactivated, the motor drives the moving plate to move independently, and the push rod pushes the injection needle.

[0011] Preferably, the movable plate is composed of a first plate and a second plate. One end of the first plate is provided with a first arc-shaped groove and a slot. The slot is located below the first arc-shaped groove. One end of the second plate is provided with a plate that can be inserted into the slot and a second arc-shaped groove. The second arc-shaped groove and the first arc-shaped groove are combined to form the through hole. The first plate and the second plate are fixed by screws.

[0012] It should be noted that the first and second plates adopt a detachable design for easy assembly and disassembly; the through hole formed by the combination of the first and second arc-shaped grooves can tightly fit the outer wall of the tube, ensuring stable sliding of the moving plate; the slot and insert plate have a concave-convex fit structure, achieving precise positioning of the two plates and preventing misalignment of the arc-shaped grooves. Overall working principle: During installation, the insert plate of the second plate is inserted into the slot of the first plate, so that the arc-shaped grooves combine to form a through hole that fits onto the tube, and then it is locked with screws; during disassembly, the two plates can be separated by unscrewing the screws, facilitating replacement of the tube or maintenance of the moving plate. In this solution, the detachable structure of the first and second plates, combined with the precisely positioned slot and insert plate, enables quick assembly and disassembly of the moving plate, facilitating replacement or repair of the moving plate.

[0013] Preferably, the first plate has a first screw hole that communicates with the slot, and the insert plate has a second screw hole that is opposite to the first screw hole. The screw can be threaded to the first screw hole and the second screw hole respectively.

[0014] It should be noted that after the insert plate is fully inserted into the slot, the first screw hole and the second screw hole automatically align. After the screw is screwed in, it forms a threaded engagement with the two screw holes, thus fixing the first plate and the second plate.

[0015] Preferably, the movable plate is provided with a threaded hole, and one end of the push rod is provided with a screw, which is threadedly connected to the threaded hole.

[0016] It should be noted that the threaded hole on the moving plate and the screw at the end of the push rod form a threaded fit, ensuring that the push rod and the axis of the moving plate are coaxial after connection. The fit between the screw and the threaded hole allows for adjustment, facilitating adjustment of the push rod's extension length. Overall working principle: Select the corresponding push rod according to the injection syringe specification, screw the screw into the threaded hole of the moving plate, and adjust the extension length by rotating the push rod until the distance between the push plate and the syringe handle is suitable. For replacement, simply rotate in the opposite direction to disassemble; no special tools are required. Overall effect: The adjustability of the threaded connection allows the push rod to adapt to injection syringes of various lengths, expanding the compatibility range; at the same time, it ensures no radial offset during push rod advancement, preventing misalignment between the syringe and the detector inlet, and improving the smoothness of liquid injection.

[0017] Preferably, the end of the push rod away from the moving plate is provided with a push plate, and the diameter of the push plate is larger than the diameter of the push rod.

[0018] It should be noted that the push plate is made of a chemically resistant material with a low coefficient of friction, and its diameter is larger than that of the push rod to increase the contact area with the syringe handle; the end face of the push plate is smooth to reduce frictional resistance with the handle.

[0019] Preferably, the top of the fixing seat is also provided with a scale, which is located on one side of the slide groove and is arranged along the length direction of the fixing seat.

[0020] It should be noted that the scale is made of corrosion-resistant and wear-resistant material, with clear graduations, and is parallel to the slide to ensure accurate reading of displacement. The high-precision scale design improves the control accuracy of the sample delivery distance and reduces errors compared to a design without graduations.

[0021] Preferably, the bottom of the fixing base is provided with support legs.

[0022] It should be noted that the legs are made of non-slip material, allowing the mounting base to be lifted off the tabletop.

[0023] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0024] 1. In this utility model, by setting an energized electromagnet in conjunction with a magnet on a moving plate, the power transmission of the solid sample spoon is realized. Combined with an independent push rod structure, solid and liquid samples are injected separately under the control of the electromagnet switch. This integrates two functions, eliminates the need to switch equipment, simplifies operation, and improves experimental efficiency.

[0025] 2. In this utility model, the movable plate can be quickly disassembled and assembled by the split structure of the first plate and the second plate and the precise positioning slot plate, which facilitates the replacement or maintenance of the movable plate.

[0026] 3. In this utility model, the adjustability of the threaded connection allows the push rod to be adapted to injection needles of various lengths, expanding the range of compatibility; at the same time, it ensures that there is no radial offset when the push rod is pushed, avoiding misalignment between the needle and the detector inlet, and improving the smoothness of liquid injection. Attached Figure Description

[0027] This utility model will be described by way of example and with reference to the accompanying drawings, wherein:

[0028] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0029] Figure 2 This is a side-view perspective three-dimensional structural diagram of the fixing base of this utility model when there is no tube body.

[0030] Figure 3 This is a cross-sectional three-dimensional structural diagram of the tube body after cutting according to this utility model;

[0031] Figure 4 This is a three-dimensional structural diagram of the movable plate of this utility model;

[0032] Figure 5 This is a three-dimensional structural diagram of the disassembled movable plate of this utility model;

[0033] Figure 6 This is a three-dimensional structural diagram of the support base of this utility model;

[0034] Wherein: 100-fixed base, 101-support leg, 102-slide groove, 103-lead screw, 104-motor, 200-tube body, 201-solid sample spoon, 202-electromagnet, 203-connecting rod, 300-moving plate, 301-first plate body, 302-second plate body, 303-through hole, 304-second arc groove, 305-first arc groove, 306-magnet, 307-insertion plate, 308-slot, 309-first screw hole, 310-second screw hole, 311-screw, 400-support plate, 500-support base, 501-groove, 600-push rod, 601-screw, 602-push plate, 603-threaded hole, 700-slider, 800-scale. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0037] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0038] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0039] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0040] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0041] Example

[0042] like Figures 1-6As shown in the figure, this utility model discloses a solid-liquid dual-purpose sampler for chemical experiments, including a fixed base 100. A tube 200 is supported on the top of the fixed base 100 by a support plate 400. The tube 200 is arranged along the length of the fixed base 100. An electromagnet 202 is slidably embedded within the tube 200. A connecting rod 203 is provided at one end of the electromagnet 202, and a solid sample inlet spoon 201 is provided at the end of the connecting rod 203 away from the electromagnet 202. A groove 102 is provided on the top of the fixed base 100. A slider 700 is slidably embedded, and a movable plate 300 is provided on the top of the slider 700. The movable plate 300 has a through hole 303 and is sleeved on the tube body 200 through the through hole 303. A magnet 306 is provided on the inner wall of the through hole 303. A push rod 600 is also provided at one end of the movable plate 300. The push rod 600 is parallel to the tube body 200. A support base 500 is also provided on the top of the fixed base 100. The support base 500 has a groove 501 for placing the injection needle. The groove 501 faces the push rod 600. It should be noted that the tube body 200 provides a sliding guide for the electromagnet 202. The electromagnet 202 is connected to an external power source through a wire. After being energized, it can generate a magnetic force with the magnet 306 on the moving plate 300. The connecting rod 203 connects the electromagnet 202 and the solid sample spoon 201 and transmits power. The solid sample spoon 201 carries the solid sample. The push rod 600 is used to push the injection needle tube. The groove 501 of the support seat 500 positions and places the injection needle tube. Overall working principle: When injecting solid samples, the solid sample is placed in the injection spoon. The electromagnet 202 is energized, causing it to generate magnetic force (attraction) with the magnet 306 in the through hole 303 of the moving plate 300. The moving plate 300 is moved, and under the action of magnetic force, the moving plate 300 drives the electromagnet 202 to slide along the tube body 200. The electromagnet 202 drives the solid injection spoon 201 to move through the connecting rod 203, pushing the solid sample to the detector. When injecting liquid samples, the syringe with the sample is placed in the groove 501. The electromagnet 202 is turned off (no magnetic force). When the moving plate 300 slides along the slide groove 102, it does not drive the electromagnet 202. It only moves itself to bring the push rod 600 close and push the injection syringe handle placed in the groove 501 of the support seat 500, injecting the liquid into the detector. Overall effect: By setting up an energized electromagnet 202 to cooperate with the magnet 306 on the moving plate 300, the power transmission of the solid sample spoon 201 is realized. Combined with the independent push rod 600 structure, solid and liquid samples are injected separately under the control of the electromagnet 202 switch. The two functions are integrated, eliminating the need to switch equipment, simplifying operation and improving experimental efficiency.

[0043] like Figure 2As shown, in another embodiment, a lead screw 103 is provided in the slide groove 102. The two ends of the lead screw 103 are rotatably connected to the two ends of the slide groove 102. The slider 700 is threadedly connected to the lead screw 103. The lead screw 103 is driven by a motor 104 located at one end of the fixed base 100. It should be noted that when solid samples are injected, the electromagnet 202 is energized, and the motor 104 drives the lead screw 103 to rotate, which in turn moves the slider 700 and the moving plate 300. The moving plate 300 moves the electromagnet 202 and the solid sample spoon 201 through magnetic force, precisely controlling the solid pushing distance. When liquid samples are injected, the electromagnet 202 is turned off, the motor 104 drives the moving plate 300 to move independently, and the push rod 600 pushes the injection needle.

[0044] like Figure 5 As shown, in another embodiment, the movable plate 300 is composed of a first plate body 301 and a second plate body 302. One end of the first plate body 301 is provided with a first arc-shaped groove 305 and a slot 308, which is located below the first arc-shaped groove 305. One end of the second plate body 302 is provided with an insert plate 307 that can be inserted into the slot 308 and a second arc-shaped groove 304. The second arc-shaped groove 304 and the first arc-shaped groove 305 are combined to form the through hole 303. The first plate body 301 and the second plate body 302 are fixed by screws 311. It should be noted that the first plate 301 and the second plate 302 adopt a split design for easy assembly and disassembly; the through hole 303 formed by the combination of the first arc groove 305 and the second arc groove 304 can tightly fit the outer wall of the tube 200, ensuring the stable sliding of the moving plate 300; the slot 308 and the insert plate 307 have a concave-convex mating structure to achieve precise positioning of the two plates and avoid misalignment of the arc grooves. Overall working principle: During installation, the insert plate 307 of the second plate 302 is inserted into the slot 308 of the first plate 301, so that the arc grooves combine to form the through hole 303, which fits onto the tube 200, and then is locked with screws 311; during disassembly, the two plates can be separated by unscrewing the screws 311, which facilitates the replacement of the tube 200 or the maintenance of the moving plate 300. In this solution, the movable board 300 is quickly disassembled and assembled by the split structure of the first plate 301 and the second plate 302 and the precisely positioned slot 308 and insert plate 307, which facilitates the replacement or maintenance of the movable board 300.

[0045] like Figure 5As shown, in another embodiment, the first plate 301 has a through-hole 309 communicating with the slot 308, and the insert plate 307 has a second screw hole 310 opposite to the first screw hole 309. The screw 311 can be threadedly connected to the first screw hole 309 and the second screw hole 310 respectively. It should be noted that after the insert plate 307 is fully inserted into the slot 308, the first screw hole 309 and the second screw hole 310 automatically align, and after the screw 311 is screwed in, it forms a threaded engagement with the two screw holes, thereby fixing the first plate 301 and the second plate 302.

[0046] like Figure 5 As shown, in another embodiment, the movable plate 300 is provided with a threaded hole 603, and one end of the push rod 600 is provided with a screw 601, which is threadedly connected to the threaded hole 603. It should be noted that the threaded hole 603 on the movable plate 300 and the screw 601 at the end of the push rod 600 form a threaded fit, ensuring that the push rod 600 and the axis of the movable plate 300 are coaxial after connection; the fit between the screw 601 and the threaded hole 603 is reserved for adjustment, facilitating adjustment of the extension length of the push rod 600. Overall working principle: Select the corresponding push rod 600 according to the specification of the injection syringe, screw the screw 601 into the threaded hole 603 of the movable plate 300, and adjust the extension length by rotating the push rod 600 until the distance between the push plate 602 and the syringe handle is suitable; for replacement, simply rotate in the opposite direction to disassemble, without the need for special tools. Overall effect: The adjustable threaded connection allows the push rod 600 to be adapted to injection needles of various lengths, expanding the range of compatibility; at the same time, it ensures that the push rod 600 has no radial offset when pushed, avoiding misalignment between the needle and the detector inlet, and improving the smoothness of liquid injection.

[0047] like Figure 5 As shown, in another embodiment, the end of the push rod 600 away from the moving plate 300 is provided with a push plate 602, the diameter of which is larger than the diameter of the push rod 600. It should be noted that the push plate 602 is made of a chemically resistant material with a low coefficient of friction, and its larger diameter increases the contact area with the syringe handle; the end face of the push plate 602 is smooth, reducing frictional resistance with the handle.

[0048] like Figure 1 As shown, in another embodiment, the top of the fixing base 100 is also provided with a scale 800. The scale 800 is located on one side of the slide groove 102 and is arranged along the length direction of the fixing base 100. It should be noted that the scale 800 is made of corrosion-resistant and wear-resistant material, with clear graduations, and is parallel to the slide groove 102 to ensure accurate reading of displacement. The design of the high-precision scale 800 improves the control accuracy of the sample injection distance and reduces errors compared to a design without graduations.

[0049] like Figure 1As shown, in another embodiment, the bottom of the fixed base 100 is provided with a support leg 101. It should be noted that the support leg 101 is made of a non-slip material to lift the fixed base 100 off the table surface.

[0050] The working principle of this utility model is as follows:

[0051] When performing solid sample injection, the solid sample is first placed in the solid sample injection spoon 201. An external power source energizes the electromagnet 202 inside the tube 200, causing the electromagnet 202 to attract the magnet 306 on the inner wall of the through hole 303 of the moving plate 300. At this time, the motor 104 at one end of the fixed base 100 is started. The motor 104 drives the lead screw 103 in the slide groove 102 to rotate. The lead screw 103 drives the slider 700 to slide along the slide groove 102 through the threaded engagement. The moving plate 300 at the top of the slider 700 moves synchronously with it. During the sliding process, the moving plate 300 drives the electromagnet 202 to slide along the tube 200 through magnetic force. The electromagnet 202 drives the solid sample injection spoon 201 to move synchronously through the connecting rod 203. The operator can read the displacement distance of the moving plate 300 through the scale 800 on the top of the fixed base 100 to accurately control the distance of the solid sample to the detector.

[0052] When injecting liquid, the injection needle containing the liquid sample is placed in the groove 501 of the support 500 for positioning. According to the needle specifications, the screw 601 at the end of the push rod 600 is engaged through the threaded hole 603 on the moving plate 300. The push rod 600 is rotated to adjust its extension length so that the push plate 602 at the end of the push rod 600 is aligned with the needle handle. Then, the power to the electromagnet 202 is turned off to demagnetize it. The motor 104 is restarted to drive the lead screw 103 to rotate, causing the moving plate 300 to slide alone along the slide groove 102. At this time, the moving plate 300 no longer drives the electromagnet 202, and only pushes the needle handle through the push rod 600. The push plate 602 transmits the pushing force evenly through a large area of ​​contact, avoiding needle tilting. At the same time, the operator controls the pushing distance with the scale 800 to accurately inject the liquid sample into the detector.

[0053] The circuits, electronic components, and modules involved are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this utility model does not involve any improvement to the software and methods.

[0054] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0055] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A dual-purpose solid-liquid sampler for chemical experiments, characterized in that, Includes a fixed base (100), on the top of which a tube body (200) is supported by a support plate (400). The tube body (200) is arranged along the length direction of the fixed base (100). An electromagnet (202) is slidably embedded in the tube body (200). One end of the electromagnet (202) is provided with a connecting rod (203). The end of the connecting rod (203) away from the electromagnet (202) is provided with a solid sample spoon (201). The top of the fixed base (100) is provided with a sliding groove (102), and a slider (700) is slidably embedded in the sliding groove (102). The top of the slider (700) is provided with a movable plate (300), and the movable plate (300) is provided with a through hole (303). The movable plate (300) is sleeved on the tube body (200) through the through hole (303). A magnet (306) is provided on the inner wall of the through hole (303). One end of the movable plate (300) is also provided with a push rod (600), which is parallel to the tube body (200). The top of the fixed seat (100) is also provided with a support seat (500), which has a groove (501) for placing the injection needle tube, and the groove (501) faces the push rod (600).

2. The dual-purpose solid-liquid sampler for chemical experiments according to claim 1, characterized in that, The slide groove (102) is provided with a lead screw (103), the two ends of the lead screw (103) are rotatably connected to the two ends of the slide groove (102), the slider (700) is threadedly connected to the lead screw (103), and the lead screw (103) is driven by a motor (104) located at one end of the fixed seat (100).

3. The dual-purpose solid-liquid sampler for chemical experiments according to claim 1, characterized in that, The movable plate (300) is composed of a first plate body (301) and a second plate body (302). One end of the first plate body (301) is provided with a first arc-shaped groove (305) and another end of the first plate body (301) is provided with a slot (308). The slot (308) is located below the first arc-shaped groove (305). One end of the second plate body (302) is provided with an insert plate (307) that can be inserted into the slot (308). One end of the second plate body (302) is also provided with a second arc-shaped groove (304). The second arc-shaped groove (304) and the first arc-shaped groove (305) are combined to form the through hole (303). The first plate body (301) and the second plate body (302) are fixed by screws (311).

4. A dual-purpose solid-liquid sampler for chemical experiments according to claim 3, characterized in that, The first plate (301) is provided with a first screw hole (309) that communicates with the slot (308), and the insert plate (307) is provided with a second screw hole (310) that is opposite to the first screw hole (309). The screw (311) can be threaded to the first screw hole (309) and the second screw hole (310) respectively.

5. A dual-purpose solid-liquid sampler for chemical experiments according to claim 1, characterized in that, The movable plate (300) is provided with a threaded hole (603), and one end of the push rod (600) is provided with a screw (601), which is threadedly connected to the threaded hole (603).

6. A dual-purpose solid-liquid sampler for chemical experiments according to claim 1, characterized in that, The push rod (600) has a push plate (602) at the end away from the moving plate (300), and the diameter of the push plate (602) is larger than the diameter of the push rod (600).

7. A dual-purpose solid-liquid sampler for chemical experiments according to claim 1, characterized in that, The top of the fixed base (100) is also provided with a scale (800), which is located on one side of the slide groove (102) and is arranged along the length direction of the fixed base (100).

8. A dual-purpose solid-liquid sampler for chemical experiments according to claim 1, characterized in that, The bottom of the fixed base (100) is provided with a support foot (101).

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