Liquid chromatography sampling equipment

Abstract

The invention relates to the technical field of sampling equipment, in particular to liquid chromatogram sampling equipment, which mainly comprises a machine body, a placement disc rotationally arranged on the top surface of the machine body, a support frame fixedly mounted on the top surface of the machine body, a pressing mechanism, an anti-dripping mechanism arranged above the machine body and an anti-dripping mechanism arranged on one side of the pressing mechanism. When a placing disc rotates to drive a sampling pipe to be far away from a needle head and a pressing frame, an elastic piece I pushes a moving plate and a concave frame to move downwards, drives a supporting column and a concave plate to extrude and approach two T-shaped blocks I, drives a hinge rod to move, pushes a T-shaped block II and a mounting rod to move, and drives a fixing sleeve and a collecting tank to move below the needle head; the fixing sleeve drives the rotating shaft and the adjusting plate to be away from the adjusting rod, under the action of the torsional spring, the tank cover rotates to open the top of the collecting tank, the collecting tank collects liquid dripping from the lower end of the needle head, the liquid dripping from the needle head is not prone to falling to the surface of a machine body, it is guaranteed that equipment is not prone to being polluted and corroded by the liquid, and the service life of the equipment is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of sampling equipment, in particular to a liquid chromatography sampling equipment. Background Art

[0002] Liquid chromatography sampling equipment is based on the separation principle of chromatography, and uses the different interactions of the components dissolved in the mobile phase when passing through the stationary phase for separation. These interactions include adsorption, distribution, exclusion and affinity, which lead to different retention times of different components in the stationary phase, so that they flow out in sequence and are detected by the detector. In seawater surveys, the content of organic pollutants in seawater is measured, such as polycyclic aromatic hydrocarbons, organochlorine pesticides, plastic additives, etc. These pollutants are usually highly toxic and difficult to degrade, causing long-term impacts on the marine ecosystem. When used, seawater sample solutions need to be collected.

[0003] The Chinese patent publication number CN214122128U discloses a liquid chromatography sampling device, which uses a reagent tray rack to place the sample to be diluted and places it on a bottom plate. The three-axis moving platform on the bottom plate controls the injection needle sampling device to move to different samples to be diluted for dilution. The control program quickly and accurately moves the injection needle sampling device and accurately controls the injection amount of the dilution liquid.

[0004] However, when this device is working, after diluting one sample, when the injection needle sampling device is moved to dilute another sample, the liquid remaining on the needle tip during the movement of the injection needle sampling device is likely to drip onto the surface of the device. The liquid dripping onto the surface of the device is likely to contaminate and corrode the device, thereby causing damage to the device and reducing the service life of the device.

[0005] Therefore, a liquid chromatography sampling device is proposed. Summary of the invention

[0006] The object of the present invention is to provide a liquid chromatography sampling device to solve the problem proposed in the above background technology that the liquid remaining on the needle tip during the movement of the injection needle sampling device is easy to drip onto the surface of the device, and the liquid dripping on the surface of the device is easy to contaminate and corrode the device, thereby causing damage to the device and reducing the service life of the device.

[0007] To achieve the above object, the present invention provides the following technical solutions: A liquid chromatography sampling device, comprising: a body, a placement plate rotatably arranged on the top surface of the body, a support frame fixedly installed on the top surface of the body, a moving device movably installed on the outer wall of the support frame, and a connector fixedly installed on the top surface of the moving device, wherein a needle and a hose are fixedly installed at both ends of the connector; A sampling tube is arranged inside the placement tray; A pressing mechanism is arranged above the machine body, and the pressing mechanism includes a semicircular plate arranged above the machine body, a fixing box is fixedly installed on the top surface of the semicircular plate, a movable rod is arranged inside the fixing box, and a pressing frame is fixedly installed at the lower end of the movable rod for pressing and fixing the top surface of the sampling tube; The anti-drip mechanism is arranged on one side of the pressing mechanism, and the anti-drip mechanism includes an L-shaped plate fixedly installed on the bottom surface of the semicircular plate. A collecting tank is arranged on one side of the L-shaped plate, and the collecting tank is used to collect liquid dripping from the needle.

[0008] Preferably, a mounting plate is fixedly installed on the left top surface of the body by bolts, a fixing column is fixedly installed on the bottom surface of the right end of the mounting plate, the lower end of the fixing column is fixedly connected to the top surface of the semicircular plate, a rubber sleeve is fixedly installed through the top surface of the semicircular plate, and the outer wall of the needle is slidably connected to the inner wall of the rubber sleeve.

[0009] Preferably, the number of the fixed boxes and the movable rods are both two, the inner walls of the two fixed boxes are respectively slidably connected with movable plates, the top surfaces of the two movable plates are respectively fixedly installed with elastic parts one, the upper ends of the two elastic parts one are respectively fixedly connected to the inner walls of the upper ends of the two fixed boxes, and the bottom surfaces of the two movable plates are respectively fixedly connected to the upper ends of the two movable rods.

[0010] Preferably, two through holes are provided on the bottom surfaces of the two fixed boxes and the top surface of the semicircular plate, the inner walls of the through holes are slidably connected to the outer wall of the movable rod, and the bottom surface of the pressing frame is slidably connected to the top surface of the sampling tube.

[0011] Preferably, the outer walls of the two fixed boxes are respectively provided with movable grooves, and the outer walls of the two movable plates are fixedly installed with concave frames. The side surfaces at both ends of the concave frames are respectively slidably connected to the inner walls of the two movable grooves, and two supporting columns are fixedly installed on the left bottom surface of the concave frame. The lower ends of the two support columns slide through the top surface of the semicircular plate and extend to the bottom of the semicircular plate.

[0012] Preferably, a concave plate is fixedly installed at the lower end of the two support columns, the bottom surfaces at both ends of the concave plate are set to be wedge-shaped, and the top surface of the L-shaped plate is provided with two T-shaped grooves, and the inner walls of the two T-shaped grooves are respectively slidably connected with T-shaped blocks, and the top surfaces of the two T-shaped blocks are set to be wedge-shaped, and the top surfaces of the two T-shaped blocks are slidably connected to the lower end of the concave plate.

[0013] Preferably, the two T-shaped blocks 1 are respectively fixedly mounted with elastic members 2 on the sides close to each other, and the other ends of the two elastic members 2 are respectively fixedly connected to the inner walls of one side of the two T-shaped slots 1.

[0014] Preferably, one side surface of the two T-shaped blocks is respectively hinged with a hinge rod, and the other end of the two hinged rods is hinged with a T-shaped block 2, the top surface of the L-shaped plate is provided with a T-slot 2, the outer wall of the T-shaped block 2 is slidably connected to the inner wall of the T-slot 2, and two mounting rods are fixedly installed on the right side of the T-shaped block 2, one end of the two mounting rods is fixedly installed with a fixing sleeve, the inner wall of the fixing sleeve is fixedly connected to the outer wall of the collecting tank by bolts, and the outer walls of the two mounting rods are slidably installed with a limiting sleeve, and the bottom surface of the limiting sleeve is fixedly connected to the top surface of the L-shaped plate, and the right side of the L-shaped plate is provided with a semicircular groove, and the outer wall of the collecting tank is slidably connected to the inner wall of the semicircular groove.

[0015] Preferably, a fixing plate is fixedly mounted on the outer wall of the fixing sleeve, the top surface of the fixing plate is rotatably connected to a rotating shaft via a bearing seat, an adjusting plate is fixedly mounted on the outer wall of the rotating shaft, a torsion spring is movably sleeved on the outer wall of the rotating shaft, two ends of the torsion spring are respectively fixedly connected to the bottom surface of the adjusting plate and the top surface of the fixing plate, a mounting block is fixedly mounted on the upper end of the rotating shaft via bolts, a tank cover is fixedly mounted on the side of the mounting block, and the bottom surface of the tank cover is slidably connected to the top surface of the collecting tank.

[0016] Preferably, a support plate is fixedly installed on the top surface of the L-shaped plate, an adjustment rod is fixedly installed on the right side of the support plate, a slide groove is opened on the left side of the adjustment plate, and the right end of the adjustment rod is slidably connected to the inner wall of the slide groove.

[0017] Compared with the prior art, the present invention has the following beneficial effects: The present invention drives the sampling tube away from the needle and the pressing frame by rotating the placement plate. At this time, the elastic member 1 pushes the moving plate and the concave frame downward, drives the support column and the concave plate to squeeze the two T-shaped blocks 1 closer together, drives the hinged rod to move and pushes the T-shaped block 2 and the mounting rod to move, drives the fixed sleeve and the collecting tank to move below the needle. At the same time, during the process of the collecting tank moving below the needle, the fixed sleeve drives the rotating shaft and the adjusting plate away from the adjusting rod. At this time, under the action of the torsion spring, the tank cover rotates to open the top of the collecting tank, so that the collecting tank collects the liquid dripping from the lower end of the needle. The liquid dripping from the needle is not easy to fall onto the surface of the body, ensuring that the equipment is not easily contaminated and corroded by the liquid, thereby improving the service life of the equipment. When the sampling tube is driven by the placement plate to rotate to the bottom of the needle, the top surface of the sampling tube is squeezed and pushed by the bottom surface of the pressure frame, and the pressure frame pushes the movable rod and the movable plate to move, and the movable plate squeezes the elastic part 1. Under the elastic force of the elastic part 1, the pressure frame presses and fixes the top of the sampling tube, ensuring that the sampling tube is not prone to shaking and causing sampling deviation during sampling, thereby improving the accuracy of sampling. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2It is a schematic side view of the three-dimensional structure of the present invention; Figure 3 For the present invention Figure 1 Enlarged view of point A in the middle; Figure 4 It is an exploded view of the three-dimensional structure of the mounting plate of the present invention; Figure 5 It is an exploded view of the three-dimensional structure of the L-shaped plate of the present invention; Figure 6 It is a schematic diagram of a partial three-dimensional structure of the present invention; Figure 7 It is a cross-sectional schematic diagram of the three-dimensional structure of the fixing box of the present invention; Figure 8 For the present invention Figure 5 Enlarged view of point B in the middle; Fig. 9 It is a schematic diagram of the three-dimensional structure of the can cover of the present invention being opened.

[0019] In the figure: 1. Machine body; 101. Placement tray; 102. Support frame; 103. Moving device; 104. Connector; 105. Needle; 106. Hose; 2. Pressing mechanism; 201. Mounting plate; 202. Fixed column; 203. Semicircular plate; 204. Rubber sleeve; 205. Fixed box; 206. Moving plate; 207. Elastic member 1; 208. Movable rod; 209. Pressing frame; 3. Anti-drip mechanism; 301. Concave frame; 302. Moving groove; 303. Support column; 304. Concave plate; 305. L-shaped plate; 306. T-shaped groove 1; 307. T-shaped block 1; 308. Elastic member 2; 309. Articulated rod; 310. T-shaped block 2; 311. T-shaped groove 2; 312. Mounting rod; 313. Limiting sleeve; 314. Fixed sleeve; 315. Collecting tank; 316. Semicircular groove; 317. Fixed plate; 318. Rotating shaft; 319. Adjusting plate; 320. Torsion spring; 321. Mounting block; 322. Support plate; 323. Adjusting rod; 324. Slide; 325. Tank cover; 4. Sampling tube. DETAILED DESCRIPTION

[0020] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0021] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0022] like Figure 1-9 As shown, the present application provides a liquid chromatography sampling device, comprising: a body 1, a placement plate 101 rotatably arranged on the top surface of the body 1, a support frame 102 fixedly installed on the top surface of the body 1, a moving device 103 movably installed on the outer wall of the support frame 102, a connector 104 fixedly installed on the top surface of the moving device 103, and a needle 105 and a hose 106 fixedly installed at both ends of the connector 104; The sampling tube 4 is arranged inside the placement tray 101; The pressing mechanism 2 is arranged above the machine body 1. The pressing mechanism 2 includes a semicircular plate 203 arranged above the machine body 1. A fixing box 205 is fixedly installed on the top surface of the semicircular plate 203. A movable rod 208 is arranged inside the fixing box 205. A pressing frame 209 is fixedly installed at the lower end of the movable rod 208 for pressing and fixing the top surface of the sampling tube 4. Specifically, Figure 1-7 As shown, a mounting plate 201 is fixedly installed on the left top surface of the body 1 by bolts, a fixing column 202 is fixedly installed on the bottom surface of the right end of the mounting plate 201, the lower end of the fixing column 202 is fixedly connected to the top surface of the semicircular plate 203, a rubber sleeve 204 is fixedly installed through the top surface of the semicircular plate 203, and the outer wall of the needle 105 is slidably connected to the inner wall of the rubber sleeve 204.

[0023] In this embodiment: a mounting plate 201 is fixedly installed on the left top surface of the body 1 by bolts, so that the mounting plate 201 can be easily and quickly installed and removed, and a rubber sleeve 204 is provided, which can limit the needle 105 to ensure that the needle 105 is more stable when moving, less prone to deviation, and improves accuracy.

[0024] Specifically, Figure 1-7 As shown, the number of fixed boxes 205 and movable rods 208 are both two, the inner walls of the two fixed boxes 205 are respectively slidably connected with movable plates 206, the top surfaces of the two movable plates 206 are respectively fixedly installed with elastic members 207, the upper ends of the two elastic members 207 are respectively fixedly connected to the inner walls of the upper ends of the two fixed boxes 205, and the bottom surfaces of the two movable plates 206 are respectively fixedly connected to the upper ends of the two movable rods 208.

[0025] In this embodiment: through the setting of the elastic member 207, an elastic force can be applied to the movable plate 206. The elastic member 207 exerts a continuous downward elastic force on the movable plate 206, ensuring that the movable plate 206 drives the movable rod 208 and the pressure frame 209 to apply a downward thrust. When the sampling tube 4 moves to the bottom of the pressure frame 209, the pressure frame 209 presses and fixes the top of the sampling tube 4, making it difficult for the sampling tube 4 to move during sampling, thereby improving the accuracy of sampling.

[0026] Specifically, Figure 1-7 As shown, two through holes are formed on the bottom surfaces of the two fixed boxes 205 and the top surface of the semicircular plate 203, the inner walls of the through holes are slidably connected to the outer wall of the movable rod 208, the bottom surface of the pressing frame 209 is set to a certain arc, and the bottom surface of the pressing frame 209 is slidably connected to the top surface of the sampling tube 4.

[0027] In this embodiment, the bottom surface of the pressing frame 209 is set to a certain curvature, so that when the bottom surface of the sampling tube 4 contacts and slides with the bottom surface of the pressing frame 209, the sampling tube 4 moves more smoothly and is not easy to get stuck.

[0028] The drip-proof mechanism 3 is arranged on one side of the pressing mechanism 2. The drip-proof mechanism 3 includes an L-shaped plate 305 fixedly installed on the bottom surface of the semicircular plate 203. A collecting tank 315 is arranged on one side of the L-shaped plate 305. The collecting tank 315 is used to collect liquid dripping from the needle 105.

[0029] Specifically, Figure 1-9 As shown, the outer walls of the two fixed boxes 205 are respectively provided with movable grooves 302, and the outer walls of the two movable plates 206 are fixedly installed with concave frames 301. The side surfaces at both ends of the concave frames 301 are slidably connected to the inner walls of the two movable grooves 302 respectively, and two supporting columns 303 are fixedly installed on the left bottom surface of the concave frames 301. The lower ends of the two supporting columns 303 slide through the top surface of the semicircular plate 203 and extend to the bottom of the semicircular plate 203.

[0030] In this embodiment: when the movable plate 206 moves, the concave frame 301 is driven to move, and when the concave frame 301 moves, the support column 303 is driven to move. The lower ends of the two support columns 303 slide through the top surface of the semicircular plate 203 and extend to the bottom of the semicircular plate 203, so that the support columns 303 are limited to a certain extent, ensuring that the support columns 303 move up and down more smoothly.

[0031] Specifically, Figure 1-9 As shown, a concave plate 304 is fixedly installed at the lower end of the two support columns 303, and the bottom surfaces of both ends of the concave plate 304 are set to be wedge-shaped. Two T-shaped grooves 306 are opened on the top surface of the L-shaped plate 305. The inner walls of the two T-shaped grooves 306 are respectively slidably connected with T-shaped blocks 307. The top surfaces of the two T-shaped blocks 307 are set to be wedge-shaped. The top surfaces of the two T-shaped blocks 307 are slidably connected to the lower end of the concave plate 304.

[0032] In this embodiment: the concave plate 304 is driven to move by the support column 303, and the bottom surfaces at both ends of the concave plate 304 are set to be wedge-shaped and the top surfaces of the two T-shaped blocks 307 are set to be wedge-shaped, so that when the concave plate 304 moves downward, the two T-shaped blocks 307 can be smoothly pushed to move closer to each other, and the setting of the T-shaped groove 306 ensures that the T-shaped block 307 moves more smoothly.

[0033] Specifically, Figure 1-9 As shown, two T-shaped blocks 1 307 are respectively fixedly installed with elastic members 2 308 on the sides close to each other, and the other ends of the two elastic members 2 308 are respectively fixedly connected to the inner walls of one side of the two T-shaped slots 1 306 .

[0034] In this embodiment, by setting the second elastic member 308, the second elastic member 308 always applies elastic force to the T-shaped block 1 307, ensuring that the side surface of the T-shaped block 1 307 is always in close contact with the side surface of the concave plate 304 and is not easily separated.

[0035] Specifically, Figure 1-9 As shown, the two T-shaped blocks 307 are respectively hinged with hinge rods 309 on the side, and the other ends of the two hinge rods 309 are hinged with T-shaped blocks 310. The top surface of the L-shaped plate 305 is provided with a T-shaped slot 311. The outer wall of the T-shaped block 310 is slidably connected to the inner wall of the T-shaped slot 311. Two mounting rods 312 are fixedly installed on the right side of the T-shaped block 310. One end of the two mounting rods 312 is fixedly installed with a fixing sleeve 314. The inner wall of the fixing sleeve 314 is fixedly connected to the outer wall of the collection tank 315 by bolts. The outer walls of the two mounting rods 312 are slidably installed with a limiting sleeve 313. The bottom surface of the limiting sleeve 313 is fixedly connected to the top surface of the L-shaped plate 305. The right side of the L-shaped plate 305 is provided with a semicircular groove 316. The outer wall of the collection tank 315 is slidably connected to the inner wall of the semicircular groove 316.

[0036] In this embodiment: the two T-blocks 1 307 are brought close to each other, driving the two hinged rods 309 to move, the two hinged rods 309 push the T-block 2 310 to move, the T-block 2 310 drives the mounting rod 312 and the fixing sleeve 314 to move, the fixing sleeve 314 drives the collecting tank 315 to move below the needle 105 to collect the dripping liquid, ensuring that the liquid is not easy to drip onto the surface of the body 1, making the body 1 not easily corroded by the liquid, and the mounting rod 312 is limited by the setting of the limiting sleeve 313, so that the mounting rod 312 drives the fixing sleeve 314 and the collecting tank 315 to move more smoothly, ensuring that the liquid in the collecting tank 315 is not easy to vibrate too much, causing the liquid to splash out and drip onto the surface of the body 1, further preventing the body 1 from being corroded by the liquid.

[0037] Specifically, Figure 1-9As shown, a fixing plate 317 is fixedly installed on the outer wall of the fixing sleeve 314, and a rotating shaft 318 is rotatably connected to the top surface of the fixing plate 317 through a bearing seat, an adjusting plate 319 is fixedly installed on the outer wall of the rotating shaft 318, and a torsion spring 320 is movably sleeved on the outer wall of the rotating shaft 318, and two ends of the torsion spring 320 are respectively fixedly connected to the bottom surface of the adjusting plate 319 and the top surface of the fixing plate 317, a mounting block 321 is fixedly installed on the upper end of the rotating shaft 318 by bolts, and a tank cover 325 is fixedly installed on the side of the mounting block 321, and the bottom surface of the tank cover 325 is slidably connected to the top surface of the collection tank 315.

[0038] In this embodiment: under the action of the torsion spring 320, the torsion spring 320 applies elastic force to the adjustment plate 319. When the collecting tank 315 moves to below the needle 105, the torsion spring 320 drives the adjustment plate 319 and the rotating shaft 318 to rotate. The rotating shaft 318 drives the mounting block 321 and the tank cover 325 to rotate and open the top of the collecting tank 315, so that the liquid dripping from the needle 105 is collected by the collecting tank 315, and the tank cover 325 does not block the dripping liquid.

[0039] Specifically, Figure 1-9 As shown, a support plate 322 is fixedly installed on the top surface of the L-shaped plate 305, an adjustment rod 323 is fixedly installed on the right side of the support plate 322, a slide groove 324 is opened on the left side of the adjustment plate 319, and the right end of the adjustment rod 323 is slidably connected to the inner wall of the slide groove 324.

[0040] In this embodiment: when the collecting tank 315 moves away from the needle 105, the slide groove 324 on the adjusting plate 319 moves to contact the adjusting rod 323, the adjusting rod 323 supports the adjusting plate 319, the adjusting plate 319 rotates to squeeze the torsion spring 320 and drive the rotating shaft 318 to rotate, the rotating shaft 318 drives the mounting block 321 and the tank cover 325 to rotate, the tank cover 325 rotates to seal the top of the collecting tank 315, to ensure that the liquid in the collecting tank 315 is not easily spilled onto the surface of the body 1, so that the body 1 is not easily corroded.

[0041] The specific solution is as follows: the placement plate 101 is rotated, and the placement plate 101 drives the sampling tube 4 to rotate to the bottom of the needle 105. The top surface of the sampling tube 4 is squeezed and pushed against the bottom surface of the pressing frame 209. The pressing frame 209 pushes the movable rod 208 and the movable plate 206 to move. The movable plate 206 squeezes the elastic member 207. Under the elastic force of the elastic member 207, the pressing frame 209 presses and fixes the top of the sampling tube 4, ensuring that the sampling tube 4 is not easy to shake and cause sampling deviation when sampling. To improve the sampling accuracy, the moving device 103 is turned on to drive the needle 105 to be inserted into the sampling tube 4 for sampling. After the sampling is completed, the moving device 103 drives the needle 105 to move upward, and the placement plate 101 rotates to drive the sampling tube 4 away from the needle 105 and the pressing frame 209. At this time, the elastic member 1 207 pushes the moving plate 206 and the concave frame 301 to move downward, driving the support column 303 and the concave plate 304 to squeeze the two T-shaped blocks 1 307 closer, driving the hinged rod 309 to move and push the T-shaped block 2 310 and the installation rod 312 to move. The fixing sleeve 314 and the collecting tank 315 are driven to move to the bottom of the needle 105. At the same time, when the collecting tank 315 moves to the bottom of the needle 105, the fixing sleeve 314 drives the rotating shaft 318 and the adjusting plate 319 away from the adjusting rod 323. At this time, under the action of the torsion spring 320, the tank cover 325 rotates to open the top of the collecting tank 315, so that the collecting tank 315 collects the liquid dripping from the lower end of the needle 105. The liquid dripping from the needle 105 is not easy to fall onto the surface of the body 1, ensuring that the device is not easily contaminated and corroded by the liquid. , improving the service life of the equipment, and when the collecting tank 315 is away from the needle 105, the slide groove 324 on the adjusting plate 319 moves to contact the adjusting rod 323, the adjusting rod 323 supports the adjusting plate 319, the adjusting plate 319 rotates to squeeze the torsion spring 320 and drive the rotating shaft 318 to rotate, the rotating shaft 318 drives the mounting block 321 and the tank cover 325 to rotate, the tank cover 325 rotates to seal the top of the collecting tank 315, to ensure that the liquid in the collecting tank 315 is not easy to spill onto the surface of the body 1, so that the body 1 is not easily corroded.

[0042] A person skilled in the art should understand that the discussion of any of the above embodiments is only exemplary; within the scope of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0043] The present invention is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A liquid chromatography sampling device, comprising: A machine body (1), a placement plate (101) rotatably mounted on the top surface of the machine body (1), a support frame (102) fixedly mounted on the top surface of the machine body (1), a moving device (103) movably mounted on the outer wall of the support frame (102), and a connector (104) fixedly mounted on the top surface of the moving device (103), wherein a needle (105) and a hose (106) are fixedly mounted at both ends of the connector (104), characterized in that: A sampling tube (4) is arranged inside the placement plate (101); A pressing mechanism (2) is arranged above the machine body (1), the pressing mechanism (2) comprising a semicircular plate (203) arranged above the machine body (1), a fixing box (205) being fixedly mounted on the top surface of the semicircular plate (203), a movable rod (208) being arranged inside the fixing box (205), and a pressing frame (209) being fixedly mounted at the lower end of the movable rod (208) for pressing and fixing the top surface of the sampling tube (4); An anti-drip mechanism (3) is arranged on one side of the pressing mechanism (2), the anti-drip mechanism (3) comprising an L-shaped plate (305) fixedly mounted on the bottom surface of the semicircular plate (203), a collecting tank (315) being arranged on one side of the L-shaped plate (305), the collecting tank (315) being used to collect liquid dripping from the needle (105).

2. A liquid chromatography sampling device according to claim 1, characterized in that: A mounting plate (201) is fixedly mounted on the top surface of the left side of the machine body (1) by means of bolts, a fixing column (202) is fixedly mounted on the bottom surface of the right end of the mounting plate (201), the lower end of the fixing column (202) is fixedly connected to the top surface of the semicircular plate (203), a rubber sleeve (204) is fixedly mounted through the top surface of the semicircular plate (203), and the outer wall of the needle head (105) is slidably connected to the inner wall of the rubber sleeve (204).

3. A liquid chromatography sampling device according to claim 2, characterized in that: The number of the fixed boxes (205) and the movable rods (208) are both two, the inner walls of the two fixed boxes (205) are slidably connected to the movable plates (206), the top surfaces of the two movable plates (206) are fixedly installed with elastic members 1 (207), the upper ends of the two elastic members 1 (207) are fixedly connected to the inner walls of the upper ends of the two fixed boxes (205), and the bottom surfaces of the two movable plates (206) are fixedly connected to the upper ends of the two movable rods (208).

4. A liquid chromatography sampling device according to claim 3, characterized in that: The bottom surfaces of the two fixed boxes (205) and the top surface of the semicircular plate (203) are both provided with two through holes, the inner walls of the through holes are slidably connected to the outer wall of the movable rod (208), and the bottom surface of the pressing frame (209) is slidably connected to the top surface of the sampling tube (4).

5. A liquid chromatography sampling device according to claim 3, characterized in that: The outer walls of the two fixed boxes (205) are respectively provided with movable grooves (302); the outer walls of the two movable plates (206) are fixedly provided with concave frames (301); the side surfaces at both ends of the concave frames (301) are respectively slidably connected to the inner walls of the two movable grooves (302); two supporting columns (303) are fixedly provided on the left bottom surface of the concave frames (301); the lower ends of the two supporting columns (303) slide through the top surface of the semicircular plate (203) and extend to the bottom of the semicircular plate (203).

6. A liquid chromatography sampling device according to claim 5, characterized in that: A concave plate (304) is fixedly mounted at the lower ends of the two support columns (303); the bottom surfaces at both ends of the concave plate (304) are both arranged in a wedge shape; two T-shaped slots (306) are provided on the top surface of the L-shaped plate (305); the inner walls of the two T-shaped slots (306) are respectively slidably connected with T-shaped blocks (307); the top surfaces of the two T-shaped blocks (307) are both arranged in a wedge shape; and the top surfaces of the two T-shaped blocks (307) are slidably connected to the lower ends of the concave plates (304).

7. A liquid chromatography sampling device according to claim 6, characterized in that: The two T-shaped blocks (307) are respectively fixedly mounted with elastic members (308) on the sides close to each other, and the other ends of the two elastic members (308) are respectively fixedly connected to the inner walls of one side of the two T-shaped slots (306).

8. A liquid chromatography sampling device according to claim 7, characterized in that: The two T-shaped blocks (307) are hingedly connected to hinge rods (309) on their sides, and the other ends of the two hinge rods (309) are hingedly connected to T-shaped blocks (310). The top surface of the L-shaped plate (305) is provided with a T-shaped groove (311). The outer wall of the T-shaped block (310) is slidably connected to the inner wall of the T-shaped groove (311). Two mounting rods (312) are fixedly installed on the right side of the T-shaped block (310). The two mounting rods (312) are connected to the T-shaped groove (311). A fixing sleeve (314) is fixedly installed at one end, the inner wall of the fixing sleeve (314) is fixedly connected to the outer wall of the collection tank (315) by means of bolts, and a limiting sleeve (313) is slidably installed on the outer walls of the two mounting rods (312), the bottom surface of the limiting sleeve (313) is fixedly connected to the top surface of the L-shaped plate (305), a semicircular groove (316) is provided on the right side surface of the L-shaped plate (305), and the outer wall of the collection tank (315) is slidably connected to the inner wall of the semicircular groove (316).

9. A liquid chromatography sampling device according to claim 8, characterized in that: A fixing plate (317) is fixedly mounted on the outer wall of the fixing sleeve (314); a rotating shaft (318) is rotatably connected to the top surface of the fixing plate (317) via a bearing seat; an adjusting plate (319) is fixedly mounted on the outer wall of the rotating shaft (318); a torsion spring (320) is movably sleeved on the outer wall of the rotating shaft (318); two ends of the torsion spring (320) are respectively fixedly connected to the bottom surface of the adjusting plate (319) and the top surface of the fixing plate (317); a mounting block (321) is fixedly mounted on the upper end of the rotating shaft (318) via bolts; a tank cover (325) is fixedly mounted on the side surface of the mounting block (321); and the bottom surface of the tank cover (325) is slidably connected to the top surface of the collection tank (315).

10. A liquid chromatography sampling device according to claim 9, characterized in that: A support plate (322) is fixedly mounted on the top surface of the L-shaped plate (305), an adjustment rod (323) is fixedly mounted on the right side surface of the support plate (322), a slide groove (324) is provided on the left side surface of the adjustment plate (319), and the right end of the adjustment rod (323) is slidably connected to the inner wall of the slide groove (324).

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