CN115615754B - An automatic sampling machine for sampling tubes - Google Patents

Abstract

The invention relates to the technical field of sampling tube sampling, specifically an automatic sampling machine for sampling tubes, and a base. The top of the base is fixedly connected with two fixing plates, and one side of the fixing plate is fixedly connected with a fixing seat. The top of the fixed seat is fixedly connected with a stepper motor; the present invention can drive the pressure plate to move downward through the output end of the electric telescopic rod. During the downward movement of the pressure plate, it will drive the fixed block to move downward, and the movement of the fixed block will drive the sliding rod to move. , the sliding rod drives the gear, rotating shaft and L-shaped extrusion rod to rotate through the fixed rack. The rotation of the L-shaped extrusion rod can open the protective cover. By designing the sample tube into a clamshell type, it is convenient to open the sample tube. When the protective cover is opened, through the setting of the sealing film, the sealing film can be directly punctured to take samples. At the same time, the protective cover of the previous sample tube can be opened during sampling to increase the sampling speed.

Description

An automatic sampling machine for sampling tubes

Technical field

The invention relates to the technical field of sampling tube sampling, specifically an automatic sampling machine for sampling tubes.

Background technique

In the production process of drugs or other chemical preparations, materials must be sampled before they are packaged together. Existing sampling equipment is expensive and complex in structure, or manual sampling requires a laboratory technician in each shift to take samples regularly. Due to human reasons, There will be differences in the quality of sampling between the day shift and the night shift, resulting in a lack of representativeness of the samples. In order to better preserve the samples, most samples will be sealed and stored.

After searching the utility model patent with the publication number CN213091285U, an automated sampling machine was disclosed. It includes: lower hopper, sampling channel opened on the lower hopper, sampling cylinder, cylinder, piston connecting rod mechanism, sample bin, and piston movement timing controller. Through the periodic reciprocating movement of the regularly driven cylinder piston, uniform and quantitative sampling is achieved, making the material samples taken more representative.

Based on the above search and combined with existing technology, we found:

Existing automatic sampling machines are used for sampling tubes. Since the lids of most sampling tubes are screwed, during the sampling process, the lid needs to be rotated to open the sampling tube, and most sampling tubes cannot be opened and sampled at the same time. carried out, thus reducing the sampling speed of the automatic sampler.

Contents of the invention

The object of the present invention is to provide an automatic sampling machine for sampling tubes to solve the problems raised in the above background technology.

The technical solution of the present invention is: an automatic sampling machine for sampling tubes, including a base. The top of the base is fixedly connected with two fixing plates, and one side of the fixing plate is fixedly connected with a fixing seat. The fixing seat A stepper motor is fixedly connected to the top of the stepper motor. The output end of the stepper motor is connected to a drive shaft through a coupling. Rotation holes are provided on one side of the two fixed plates. One end of the drive shaft passes through both sides in turn. There are two rotation holes, and a driven shaft is rotatably connected to the side of the two fixed plates that are close to each other. A conveyor belt is tensioned and sleeved on the driving shaft and the driven shaft. The conveying direction of the conveyor belt A plurality of mounting bases are evenly and fixedly connected to the plurality of mounting bases, and sample tubes are fixedly connected to the plurality of mounting bases. An L-shaped mounting bracket is fixedly connected to the top of the base, and an automatic sampling mechanism is installed on the L-shaped mounting bracket. A cover closing mechanism is installed on the L-shaped mounting frame.

Preferably, the tops of the plurality of sample tubes are rotatably connected to protective covers, the tops of the protective covers are fixedly connected to bumps, and the discharge ports of the sample tubes are fixedly connected to sealing films.

Preferably, the automatic sampling mechanism includes an electric telescopic rod fixedly connected to the top of the L-shaped mounting frame. The output end of the electric telescopic rod is fixedly connected with a sampling tube, and the sampling tube is connected to a plurality of the sample tubes. Adaptation, a pressure plate is fixedly connected to the output end of the electric telescopic rod, and a cover opening unit is adapted to be installed on the pressure plate.

Preferably, the lid opening unit includes an L-shaped rod fixedly connected to one side of the L-shaped mounting bracket, a fixing sleeve fixedly connected to one side of the L-shaped rod, and a slide opening at the top of the fixing sleeve. hole, a sliding rod is slidably connected in the sliding hole, a fixed block is fixedly connected to the bottom end of the sliding rod, and the fixed block is adapted to the pressure plate.

Preferably, a return spring is sleeved on the sliding rod, and both ends of the return spring are fixedly connected to the fixed sleeve and the sliding rod respectively.

Preferably, a fixed rack is fixedly connected to the bottom end of the sliding rod, a gear is engaged with the fixed rack, a rotating shaft is keyed to one side of the gear, and a rotating shaft is provided on one side of the L-shaped rod. hole, one end of the rotation shaft passes through the rotation hole and is fixedly connected with an L-shaped extrusion rod, and the L-shaped extrusion rod is adapted to a plurality of the bumps.

Preferably, the cover closing mechanism includes a slide rail fixedly connected to one side of the L-shaped mounting frame, a slide block is slidably connected to the slide rail, and a fixed rod is rotationally connected to one side of the slide block. The fixing rod is adapted to the protective cover.

Preferably, a bar frame is connected to the fixed rod, a connecting rod is fixedly connected to the top of the bar frame, the connecting rod is adapted to the pressure plate, and one side of the slide rail is fixedly connected to Fixed column, the bottom end of the fixed column is provided with a chute, and a movable column is slidably connected in the chute. The bottom end of the movable column is fixedly connected to the top of the connecting rod, and the movable column is sleeved There is a telescopic spring, and both ends of the telescopic spring are fixedly connected to the connecting rod and the fixed column respectively.

Preferably, the guide rail is fixedly connected to one side of the L-shaped mounting bracket, and a scanner is fixedly connected to the guide rail, and the scanner is adapted to a plurality of the sample tubes.

Preferably, the top of the L-shaped mounting bracket is provided with an adjustment hole, a threaded rod is rotatably connected in the adjustment hole, the bottom end of the threaded rod is threaded with a threaded pipe, and the bottom end of the threaded pipe is fixedly connected to The top of the scanner.

The present invention provides an automatic sampling machine for sampling tubes through improvements. Compared with the existing technology, the present invention has the following improvements and advantages:

One: the present invention uses a stepper motor to drive the drive shaft to rotate intermittently, and the drive shaft drives multiple sample tubes to move intermittently through the conveyor belt. The output end of the electric telescopic rod will drive the sampling tube to move downward once, and the sampling tube moves downward. Directly puncture the sealing film on the sample tube and enter the sample tube for sampling. At the same time, the output end of the electric telescopic rod drives the pressure plate to move downward. When the pressure plate moves downward, it will drive the fixed block to move downward. The movement of the fixed block drives the sliding rod to move. , the sliding rod drives the gear, rotating shaft and L-shaped extrusion rod to rotate through the fixed rack. The rotation of the L-shaped extrusion rod can open the protective cover. By designing the sample tube into a clamshell type, it is convenient to open the sample tube. When the protective cover is opened, through the setting of the sealing film, the sealing film can be directly punctured to take samples. At the same time, the protective cover of the previous sample tube can be opened during sampling to increase the sampling speed;

Second: In the present invention, the downward movement of the pressure plate will drive the connecting rod to move. The connecting rod moves to drive the movable column and the telescopic spring to move, causing the telescopic spring to elastically deform. The connecting rod moves to drive the bar frame to move, and the bar frame moves to drive the fixed rod. and the slider moves, so that the slider moves on the inclined section of the slide rail, and the fixed rod can squeeze the protective cover to close during the movement, so that the next sample tube can be automatically capped during the sampling process, and then Easy to transport sample tubes;

Third: The present invention drives the threaded tube to rise and fall by rotating the threaded rod, and the threaded tube rises and falls to drive the scanner to rise and fall, thereby adjusting the position of the scanner, thereby facilitating scanning of different sample tubes, and performing sampling on the sample tubes at the same time. Scan to facilitate recording and archiving of sample data.

Description of drawings

The present invention will be further explained below in conjunction with the accompanying drawings and examples:

Figure 1 is a schematic three-dimensional structural diagram of the present invention;

Figure 2 is a schematic three-dimensional structural diagram of the present invention from another perspective;

Figure 3 is a schematic three-dimensional structural diagram of the automatic sampling mechanism of the present invention;

Figure 4 is a schematic three-dimensional structural diagram of the cover opening unit of the present invention;

Figure 5 is a schematic three-dimensional structural diagram of the lid closing mechanism of the present invention;

Figure 6 is a schematic three-dimensional structural diagram of the sample tube body of the present invention;

Figure 7 is a schematic three-dimensional structural diagram of the threaded rod, threaded tube and scanner of the present invention;

Figure 8 is a schematic cross-sectional structural diagram of the sample tube of the present invention.

Explanation of reference symbols:

1. Base; 101. Fixed plate; 102. Stepper motor; 103. Drive shaft; 104. Conveyor belt; 105. Mounting seat; 106. Sample tube; 107. Sealing film; 108. Protective cover; 109. Bump; 2. L-shaped mounting bracket; 201. Electric telescopic rod; 202. Sampling tube; 203. Pressing plate; 3. L-shaped rod; 301. Rotating shaft; 302. L-shaped extrusion rod; 303. Gear; 304. Fixed rack ;305. Sliding rod; 306. Fixed sleeve; 307. Return spring; 308. Fixed block; 4. Slide rail; 401. Slider; 402. Fixed rod; 403. Bar frame; 404. Connecting rod; 405. Movable column; 406, telescopic spring; 407, fixed column; 5, guide track; 501, scanner; 502, threaded pipe; 503, threaded rod.

Detailed ways

The present invention will be described in detail below, and the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

The present invention provides an automatic sampling machine for sampling tubes through improvements. The technical solution of the present invention is:

As shown in Figures 1 to 8, an automatic sampler for sampling tubes includes a base 1. Two fixing plates 101 are fixedly connected to the top of the base 1. One side of the fixing plate 101 is fixedly connected to a fixing seat. The fixing seat A stepper motor 102 is fixedly connected to the top of the stepper motor 102. The output end of the stepper motor 102 is connected to a drive shaft 103 through a coupling. Rotation holes are provided on one side of the two fixed plates 101, and one end of the drive shaft 103 passes through the two fixed plates 101 in turn. The rotation hole, the side of the two fixed plates 101 close to each other is rotatably connected to the driven shaft, the driving shaft 103 and the driven shaft are tensioned and connected with a conveyor belt 104, and a plurality of conveyor belts 104 are evenly and fixedly connected in the conveying direction. Mounting base 105. Sample tubes 106 are fixedly connected to multiple mounting bases 105. An L-shaped mounting bracket 2 is fixedly connected to the top of the base 1. An automatic sampling mechanism is installed on the L-shaped mounting bracket 2. An automatic sampling mechanism is installed on the L-shaped mounting bracket 2. Closing mechanism; with the above structure and the setting of the mounting base 105, the mounting base 105 is set to a convex shape and cooperates with the concave design of the bottom of the sample tube 106 to facilitate the fixation of the sample tube 106. Through the stepper motor The arrangement of 102 can drive the sample tube 106 through the conveyor belt 104 for intermittent transportation.

Furthermore, a protective cover 108 is rotatably connected to the top of the plurality of sample tubes 106, a bump 109 is fixedly connected to the top of the protective cover 108, and a sealing film 107 is fixedly connected to the outlet of the sample tube 106; with the above structure , through the setting of the protective cover 108, the sample can be strengthened to be protected, and through the sealing film 107, the sample can be sealed and preserved, and at the same time, the sealing film 107 can be directly punctured for sampling when sampling, which is convenient for use.

Further, the automatic sampling mechanism includes an electric telescopic rod 201 fixedly connected to the top of the L-shaped mounting frame 2. The output end of the electric telescopic rod 201 is fixedly connected with a sampling tube 202. The sampling tube 202 is adapted to a plurality of sample tubes 106. The electric telescopic rod 201 is A pressure plate 203 is fixedly connected to the output end of the telescopic rod 201, and a lid opening unit is adapted to be installed on the pressure plate 203. With the above structure and the setting of the sampling tube 202, the electric telescopic rod 201 is started to drive the sample tube 106 to move downward, and the sample When the tube 106 moves, the sealing film 107 will be directly punctured for sampling, which facilitates sampling of the sample.

Further, the cover opening unit includes an L-shaped rod 3 fixedly connected to one side of the L-shaped mounting bracket 2. One side of the L-shaped rod 3 is fixedly connected with a fixing sleeve 306. The top of the fixing sleeve 306 is provided with a sliding hole. A sliding rod 305 is slidably connected in the hole, and a fixed block 308 is fixedly connected to the bottom end of the sliding rod 305. The fixed block 308 is adapted to the pressure plate 203.

Further, the sliding rod 305 is sleeved with a return spring 307, and both ends of the return spring 307 are fixedly connected to the fixed sleeve 306 and the sliding rod 305 respectively; with the above structure, through the arrangement of the sliding rod 305, the return spring 307 interacts with each other. When the pressure plate 203 moves downward, it will drive the fixed block 308 to move downward. The movement of the fixed block 308 drives the sliding rod 305 to move. The movement of the sliding rod 305 drives the return spring 307 to compress and deform. When the pressure plate 203 is reset, The compressed return spring 307 will drive the sliding rod 305 to return.

Further, a fixed rack 304 is fixedly connected to the bottom end of the sliding rod 305. A gear 303 is engaged with the fixed rack 304. One side of the gear 303 is keyed to a rotating shaft 301, and a rotating hole is provided on one side of the L-shaped rod 3. , one end of the rotating shaft 301 passes through the rotating hole and is fixedly connected with an L-shaped extrusion rod 302. The L-shaped extrusion rod 302 is adapted to the plurality of bumps 109; with the above structure, through the arrangement of the L-shaped extrusion rod 302 , the movement of the sliding rod 305 drives the fixed rack 304 to move, the movement of the fixed rack 304 drives the gear 303, the rotating shaft 301 and the L-shaped extrusion rod 302 to rotate, realizing that the rotation of the L-shaped extrusion rod 302 can squeeze the bump 109 to drive protection The cover 108 rotates, and the protective cover 108 can be automatically opened.

Further, the cover closing mechanism includes a slide rail 4 fixedly connected to one side of the L-shaped mounting bracket 2. A slide block 401 is slidably connected to the slide rail 4, and a fixed rod 402 is rotationally connected to one side of the slide block 401. The fixed rod 402 is connected to The protective cover 108 is adapted; with the above structure and the arrangement of the fixing rod 402, the protective cover 108 of the sample tube 106 after sampling can be closed.

Further, a bar frame 403 is connected to the fixed rod 402, and a connecting rod 404 is fixedly connected to the top of the bar frame 403. The connecting rod 404 is adapted to the pressure plate 203, and a fixed column 407 is fixedly connected to one side of the slide rail 4. , a chute is provided at the bottom of the fixed column 407, and a movable column 405 is slidably connected in the chute. The bottom end of the movable column 405 is fixedly connected to the top of the connecting rod 404. A telescopic spring 406 is connected to the movable column 405. The telescopic spring The two ends of 406 are fixedly connected to the connecting rod 404 and the fixed column 407 respectively; with the above structure and the setting of the bar frame 403, the downward movement of the pressure plate 203 will drive the connecting rod 404 to move, and the movement of the connecting rod 404 will drive the bar frame 403 Moving, the movement of the bar frame 403 drives the fixed rod 402 and the slider 401 to move, so that the next sample tube 106 can be automatically capped during the sampling process, thereby facilitating the transportation of the sample tube 106.

Furthermore, a guide rail 5 is fixedly connected to one side of the L-shaped mounting frame 2, and a scanner 501 is fixedly connected to the guide rail 5. The scanner 501 is adapted to the plurality of sample tubes 106; with the above structure, through the scanner The setting of 501 enables scanning of the sample tube 106, which facilitates corresponding storage of sample information.

Further, an adjustment hole is provided at the top of the L-shaped mounting bracket 2, and a threaded rod 503 is rotatably connected in the adjustment hole. The bottom end of the threaded rod 503 is threaded with a threaded pipe 502, and the bottom end of the threaded pipe 502 is fixedly connected to the scanner 501. With the above structure, through the setting of the threaded rod 503, rotating the threaded rod 503 drives the threaded tube 502 to rise and fall, and the threaded tube 502 rises and falls to drive the scanner 501 to rise and fall, thereby realizing the adjustment of the position of the scanner 501, thereby facilitating the adjustment of the scanner 501. Different sample tubes 106 are scanned.

Working principle: The stepper motor 102 drives the drive shaft 103 to rotate intermittently, and the drive shaft 103 drives multiple sample tubes 106 to move intermittently through the conveyor belt 104, so that each sample tube 106 moves to the bottom of the sampling tube 202, and the sampling tube Every time 202 moves, the output end of the electric telescopic rod 201 will drive the sampling tube 202 to move downward once. The sampling tube 202 moves downward to directly pierce the sealing film 107 on the sample tube 106 and enter the sample tube 106 for sampling. At the same time, the electric telescopic rod 202 moves downward. The output end of the rod 201 drives the pressure plate 203 to move downward. When the pressure plate 203 moves downward, it will drive the fixed block 308 to move downward. The movement of the fixed block 308 drives the sliding rod 305 to move. The movement of the sliding rod 305 drives the return spring 307 to compress and generate force. The spring deforms, and the movement of the sliding rod 305 drives the fixed rack 304 to move. The movement of the fixed rack 304 drives the gear 303 to rotate. The rotation of the gear 303 drives the rotating shaft 301 and the L-shaped extrusion rod 302 to rotate. The rotation of the L-shaped extrusion rod 302 can squeeze the The pressing bump 109 drives the protective cover 108 to rotate, so that the protective cover 108 is opened. By designing the sample tube 106 into a flip-top type, it is convenient to open the protective cover 108 of the sample tube 106. Through the setting of the sealing film 107, during sampling The sealing film 107 can be directly punctured for sampling, and the protective cover 108 of the previous sample tube 106 can be opened during sampling to increase the sampling speed.

The downward movement of the pressure plate 203 will drive the connecting rod 404 to move. The connecting rod 404 moves to drive the movable column 405 and the telescopic spring 406 to move, causing the telescopic spring 406 to elastically deform. The connecting rod 404 moves to drive the bar frame 403 to move, and the bar frame 403 moves. The fixed rod 402 and the slider 401 are driven to move, so that the slider 401 moves on the inclined section of the slide rail 4. The fixed rod 402 can squeeze the protective cover 108 to close during the movement, thus realizing the automatic closing of the protective cover 108 during the sampling process. The latter sample tube 106 is capped to facilitate transportation of the sample tube 106 .

Rotating the threaded rod 503 drives the threaded tube 502 to rise and fall, and the threaded tube 502 rises and falls to drive the scanner 501 to rise and fall, thereby realizing the adjustment of the position of the scanner 501, thereby facilitating scanning of different sample tubes 106, and sampling the sample tubes 106 at the same time. Scan to facilitate recording and archiving of sample data.

The above description enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be practiced in other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended 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 (4)

1. An automatic sampling machine for sampling tubes, including a base (1), characterized in that: two fixing plates (101) are fixedly connected to the top of the base (1), one of which is one of the fixing plates (101). A fixed base is fixedly connected to the side, a stepper motor (102) is fixedly connected to the top of the fixed base, the output end of the stepper motor (102) is connected to a drive shaft (103) through a coupling, and the two A rotation hole is provided on one side of the fixed plate (101), and one end of the driving shaft (103) passes through the two rotation holes in sequence. The sides of the two fixed plates (101) that are close to each other are rotationally connected with a follower. The driving shaft (103) and the driven shaft are tensioned and connected with a conveyor belt (104), and a plurality of mounting seats (105) are evenly and fixedly connected to the conveyor belt (104) in the conveying direction. Sample tubes (106) are fixedly connected to multiple mounting bases (105), an L-shaped mounting bracket (2) is fixedly connected to the top of the base (1), and an L-shaped mounting bracket (2) is mounted on the There is an automatic sampling mechanism, and a cover closing mechanism is installed on the L-shaped mounting frame (2); A protective cover (108) is rotatably connected to the top of the plurality of sample tubes (106), a bump (109) is fixedly connected to the top of the protective cover (108), and the discharge port of the sample tube (106) is fixed to Connected with a sealing film (107); The automatic sampling mechanism includes an electric telescopic rod (201) fixedly connected to the top of the L-shaped mounting frame (2), and a sampling tube (202) is fixedly connected to the output end of the electric telescopic rod (201). The tube (202) is adapted to multiple sample tubes (106), and a pressure plate (203) is fixedly connected to the output end of the electric telescopic rod (201); The cover opening unit includes an L-shaped rod (3) fixedly connected to one side of the L-shaped mounting bracket (2), and a fixing sleeve (306) is fixedly connected to one side of the L-shaped rod (3). A sliding hole is provided at the top of the sleeve (306). A sliding rod (305) is slidably connected in the sliding hole. A fixed block (308) is fixedly connected to the bottom end of the sliding rod (305). The fixed block (308) is fixedly connected to the sliding hole. 308) is adapted to the pressure plate (203); A return spring (307) is sleeved on the sliding rod (305), and both ends of the return spring (307) are fixedly connected to the fixed sleeve (306) and the sliding rod (305) respectively; A fixed rack (304) is fixedly connected to the bottom end of the sliding rod (305), a gear (303) is engaged with the fixed rack (304), and a rotating shaft is keyed to one side of the gear (303) (301), a rotation hole is provided on one side of the L-shaped rod (3), and one end of the rotation shaft (301) passes through the rotation hole and is fixedly connected to an L-shaped extrusion rod (302). The shaped extrusion rod (302) is adapted to a plurality of the bumps (109); The stepper motor (102) drives the drive shaft (103) to rotate intermittently, and the drive shaft (103) drives multiple sample tubes (106) to move intermittently through the conveyor belt (104), so that each sample tube (106) will move to Below the sampling pipe (202), and every time the sampling pipe (202) moves, the output end of the electric telescopic rod (201) will drive the sampling pipe (202) to move downward once, and the sampling pipe (202) moves downward to directly pierce The sealing film (107) on the sample tube (106) enters the sample tube (106) for sampling. At the same time, the output end of the electric telescopic rod (201) drives the pressure plate (203) to move downward. During the downward movement of the pressure plate (203) , will drive the fixed block (308) to move downward, the movement of the fixed block (308) drives the sliding rod (305) to move, the movement of the sliding rod (305) drives the return spring (307) to compress and deform, and the sliding rod (305) moves The fixed rack (304) is driven to move, the fixed rack (304) moves and drives the gear (303) to rotate, the rotation of the gear (303) drives the rotating shaft (301) and the L-shaped extrusion rod (302) to rotate, and the L-shaped extrusion rod The rod (302) rotates and squeezes the bump (109) to drive the protective cover (108) to rotate, so that the protective cover (108) is opened. By designing the sample tube (106) into a flip-top type, it is convenient to open the sample tube (106). The protective cover (108) is opened, and through the setting of the sealing film (107), the sealing film (107) is directly punctured during sampling, and at the same time, the protective cover (108) of the previous sample tube (106) is opened during sampling. 2. An automatic sampler for sampling tubes according to claim 1, characterized in that: the cover closing mechanism includes a slide rail (4) fixedly connected to one side of the L-shaped mounting frame (2), and the A slide block (401) is slidably connected to the slide rail (4), and a fixed rod (402) is rotationally connected to one side of the slide block (401). The fixed rod (402) is in contact with the protective cover (108). adaptation; A bar frame (403) is connected to the fixed rod (402), and a connecting rod (404) is fixedly connected to the top of the bar frame (403). The connecting rod (404) and the pressure plate (203) ), a fixed column (407) is fixedly connected to one side of the slide rail (4), a chute is provided at the bottom of the fixed column (407), and a movable column (407) is slidably connected in the chute. 405), the bottom end of the movable column (405) is fixedly connected to the top of the connecting rod (404), the movable column (405) is sleeved with a telescopic spring (406), the telescopic spring (406) Both ends are fixedly connected to the connecting rod (404) and the fixed column (407) respectively; The downward movement of the pressure plate (203) will drive the connecting rod (404) to move, and the movement of the connecting rod (404) will drive the movable column (405) and the telescopic spring (406) to move, causing the telescopic spring (406) to elastically deform, and the connecting rod (404) ) movement drives the bar frame (403) to move, and the movement of the bar frame (403) drives the fixed rod (402) and the slider (401) to move, so that the slider (401) moves on the inclined section of the slide rail (4), The fixed rod (402) squeezes the protective cover (108) to close during the movement, and automatically caps the next sample tube (106) during the sampling process. 3. An automatic sampler for sampling tubes according to claim 2, characterized in that: one side of the L-shaped mounting bracket (2) is fixedly connected to a guide rail (5), and the guide rail (5) A scanner (501) is fixedly connected, and the scanner (501) is adapted to a plurality of the sample tubes (106). The sample tubes (106) are scanned through the settings of the scanner (501). 4. An automatic sampler for sampling tubes according to claim 2, characterized in that: an adjustment hole is provided at the top of the L-shaped mounting bracket (2), and a threaded rod (503) is rotatably connected in the adjustment hole. , the bottom end of the threaded rod (503) is threaded with a threaded pipe (502), and the bottom end of the threaded pipe (502) is fixedly connected to the top of the scanner (501); Rotating the threaded rod (503) drives the threaded tube (502) to rise and fall, and the threaded tube (502) rises and falls to drive the scanner (501) to rise and fall, and the position of the scanner (501) is adjusted to facilitate the inspection of different sample tubes (106). Scanning, scanning the sample tube (106) while sampling.