CN114964942A - Pre-processing device - Google Patents

Abstract

The invention discloses a pretreatment device, which comprises a tube cutting mechanism and a tube extruding mechanism, wherein the tube cutting mechanism comprises an upper cutter and a lower cutter which move relatively, the upper cutter and the lower cutter move relatively to cut the upper end of a swab tube, so that a cut for adding a reagent is formed at the upper end of the swab tube; the tube squeezing mechanism squeezes the swab tube to elastically deform the swab tube so as to uniformly mix the sample and the reagent in the swab tube. According to the pretreatment device, the swab tube is cut off by the tube cutting mechanism to form the cut, so that compared with the traditional pretreatment device in which the tube plug is pulled out or pierced, the device is quicker and more convenient, and is convenient for batch treatment of equipment; and utilize the swab pipe body to be the characteristic of hose, through the mode of extrusion body outer wall, make intraductal reagent and sample intensive mixing, need not to rock the body, convenient and fast more.

Description

Pre-processing device

technical field

The invention belongs to the field of medical detection, in particular to a preprocessing device.

Background technique

A complete sample analysis process, from the beginning of sampling to writing an analysis report, can be roughly divided into four steps: sample collection, sample preprocessing, analysis and testing; data processing and reporting results. The exploration and research of various new technologies and methods has become one of the important topics and development directions of contemporary analytical chemistry.

However, the traditional method of sample pretreatment is manual processing, that is, manual recording of sample information, manual addition of diluent, and manual insertion of test tubes into analytical instruments for analysis. The problems caused by this method are not only time-consuming and labor-intensive, but also may cause errors in the operation of different personnel and the multiple transfer of samples. The use of a large amount of organic solvents in the pretreatment process will also pollute the environment.

SUMMARY OF THE INVENTION

The present invention provides a pre-treatment device to solve the technical problems of time-consuming, labor-intensive and easy-to-pollute manual treatment mentioned in the background art.

In order to achieve the above object, the concrete technical scheme of the pretreatment device of the present invention is as follows:

A pretreatment device includes a pipe cutting mechanism and a pipe extrusion mechanism, the pipe cutting mechanism includes an upper cutter and a lower cutter that move relatively, the upper cutter and the lower cutter move towards each other, and the upper end of the swab tube is cut off, so that the upper end of the swab tube is formed. There is an incision for adding reagents; the squeezing mechanism squeezes the swab tube to elastically deform the swab tube to mix the samples and reagents in the swab tube.

Further, the upper side of the cutter is provided with a swingable pusher plate, and the lower end of the pusher plate hits the upper end of the swab tube, so as to fly away the cut waste at the upper end of the swab tube.

Further, the outer cover of the cutter is provided with a material guide cover, and the waste material knocked off by the pushing plate slides along the inner cavity of the material guide cover.

Further, the material guide cover includes a relatively movable enclosure plate and a guide plate, and an opening is formed on the adjacent side of the enclosure plate and the guide plate; with the cutter cutting the tube, the enclosure plate and the guide plate are closed and the cover is arranged outside the swab tube; With the separation of the upper and lower cutters, the shroud and the guide plate are separated for movement of the swab tube from between the shroud and the guide plate.

Further, the middle part of the ejector plate is rotatably connected with the enclosure plate, the end of the ejector plate away from the cutter is provided with a first elastic member to pull the ejector plate, and the end of the ejector plate close to the cutter is swung to knock off waste materials.

Further, the enclosure plate is provided with a rotating shaft, and the pusher plate is provided with a slotted hole arranged along the length direction, and the slotted slot is provided for the rotation shaft to pass through; the enclosure plate is slidably connected with a guide shaft, and the end of the guide shaft is hinged with the lower end of the pusher plate. , the guide shaft limits the advancing direction of the lower end of the ejector plate.

Further, a rotatable driving wheel is arranged on the enclosure plate, and a rotatable driven wheel is arranged on the guide plate; the enclosure plate and the guide plate move toward each other, so that the driving wheel and the driven wheel are respectively abutted on both sides of the swab tube, and the active The wheel drives the swab tube to rotate to cooperate with the camera to scan the swab tube.

Further, the tube squeezing mechanism includes a movable positioning column, and a relatively movable first squeezing tube pressing head and a second squeezing tube pressing head; Tube positioning; the two squeeze tube indenters move relative to each other, squeeze the outer wall of the swab tube to mix the sample and reagent inside the tube body.

Further, the squeeze tube pressing head is slidably connected to the sliding seat; a buffer member is arranged between the tube squeeze tube pressing head and the sliding seat, and the buffer member buffers the impact force of the squeeze tube pressing head and the swab tube in contact.

Further, the swab tube is placed on the test tube rack; the two sides of the test tube rack are formed with protective plates for the test tube rack to move between the two protective plates; the squeeze tube pressure head penetrates the protective plate and the test tube rack, and is connected with the outer wall of the swab tube. Abut.

The pretreatment device of the present invention has the following advantages:

1. The swab tube is cut by the tube cutting mechanism to form an incision, which is faster and more convenient than the method of pulling out the tube plug or piercing the tube plug in the traditional pretreatment device, and it is convenient for the equipment to perform batch processing;

2. Using the swinging ejector plate, the scraps cut off from the swab tube are knocked away, and the scraps are quickly recovered. Moreover, the guide shaft ensures that the lower end of the ejector plate moves in a straight line, ensuring the impact of the ejector plate on the test tube. position to ensure that the test tube is knocked off;

3. Since the tube body of the swab tube is a flexible tube, the reagents and samples in the tube can be fully mixed by squeezing the outer wall of the tube, without shaking the tube body, which is more convenient and fast;

4. The setting position of the squeeze tube pressing block cooperates with the guard plate and the test tube rack, and is supplemented by the positioning column to ensure the positioning effect.

Description of drawings

Fig. 1 is the schematic diagram of test tube rack and swab tube of the present invention;

2 is a cross-sectional view of a test tube rack and a swab tube of the present invention;

3 is a schematic structural diagram of the code scanning mechanism and the pipe cutting mechanism in the upstream part of the pre-processing device of the present invention;

4 is a schematic structural diagram of the downstream part of the dilution mechanism and the extrusion mechanism of the pretreatment device of the present invention;

5 is a schematic structural diagram of a mobile device according to the present invention;

6 is a schematic structural diagram of the pipe cutting mechanism of the present invention (the material guide cover is hidden);

7 is a schematic structural diagram of the pipe cutting mechanism of the present invention (shown by the material guide cover);

8 is a sectional view of the pipe cutting mechanism of the present invention;

9 is a cross-sectional view of a code scanning mechanism of the present invention;

Fig. 10 is the enlarged view of A part of Fig. 9;

11 is a schematic diagram of the installation position of the extrusion mechanism of the present invention;

12 is a schematic structural diagram of the extrusion mechanism of the present invention;

FIG. 13 is an enlarged view of part B of FIG. 12;

FIG. 14 is an enlarged view of the C part of FIG. 12 .

Description of marks in the figure:

1. Test tube rack; 11. Base; 12. Side wall; 13. Slot; 14. Through groove; 15. Connecting part; 16. Side edge; 2. Swab tube; 21. Tube body; 22. Tube plug; 23, swab; 3, workbench; 31, first slide; 32, second slide; 33, third slide; 34, guard plate; 341, escape opening; 35, limit wheel; 4, move device; 41, transmission belt; 42, drive slider; 43, hook; 5, column; 51, first fixing plate; 52, second fixing plate; 6, pipe cutting mechanism; 61, first sliding table; 611, Upper cutter; 612, enclosure plate; 613, rotating shaft; 62, second sliding table; 621, lower cutter; 622, guide plate; 6221, discharge port; 6222, material stopper; 63, first lead screw; 631, pipe cutting motor; 64, pusher plate; 641, slotted hole; 65, first spring; 66, guide shaft; 67, return post; 7, scan code mechanism; 71, mounting seat; 72, adjusting plate ;721, driven wheel; 722, screw; 73, second spring; 74, driving wheel; 741, scan code motor; 8, filling needle; 9, extrusion mechanism; 91, first slide; 911, first 92, the second slide; 921, the second squeeze head; 93, the second screw; 931, the squeeze motor; 94, the buffer spring; 95, the boss; 951, the soft pressure block; 952, concave surface; 96, nut; 961, buffer pad; 97, positioning column; 971, conical pressure block; 98, compression spring.

Detailed ways

In order to better understand the purpose, structure and function of the present invention, a pre-processing device of the present invention will be described in further detail below with reference to the accompanying drawings.

The pretreatment device of the present invention, as shown in FIG. 3 and FIG. 4 , includes a body and a test tube rack 1 . A swab tube 2 is placed on the test tube rack 1, and a mobile device 4 is arranged on the body. The mobile device 4 drives the test tube rack 1 and the swab tube 2 to move on the body, so that the swab tube 2 goes through code scanning, tube cutting, Dilute and squeeze each body to complete the pretreatment.

1 and 2, the swab tube 2 includes a tube body 21 and a tube plug 22, the tube plug 22 blocks the tube body 21, the tube plug 22 is fixed with the swab 23, and the end of the swab 23 is stained with The sample is inserted into the tube body 21 . The tube body 21 is a hose, so that the sample on the swab 23 is mixed and then added to the reagent of the tube body 21 by squeezing the outer wall of the tube body 21 to complete the pretreatment.

The test tube rack 1 includes a base 11, the base 11 is provided with opposite side walls 12, a slot 13 for the insertion of the swab tube 2 is formed between the adjacent side walls 12, and the front and rear sides of the test tube rack 1 are formed. The through groove 14 is connected with the slot 13 to expose the swab tube 2 so as to facilitate the subsequent extrusion of the tube body 21 and mixing. In addition, the tops of the side walls 12 are also provided with connecting portions 15 to connect the side walls 12 and ensure the strength of the test tube rack 1 .

In order to drive the test tube rack 1 to move, the body is provided with a worktable 3 , and a moving device 4 is provided on the lower side of the worktable 3 to drive the test tube rack 1 to slide on the worktable 3 . In order to save the floor space of the pre-processing device, the workbench 3 is provided with a first slideway 31 , a second slideway 32 and a third slideway 33 which are connected in sequence. The first slideway 31 and the third slideway 33 are arranged opposite to each other and flow in opposite directions. The second slideway 32 extends from the end of the first slideway 31 to the starting end of the third slideway 33, and the second slideway 32 is sequentially provided with scanning code, Institutions for cutting, diluting and squeezing tubes. First, the test tube rack 1 enters the second slideway 32 from the first slideway 31; then, in the second slideway 32, the pre-processing is completed by scanning the code, cutting the tube, diluting and squeezing the tube to complete the pre-processing; The treated swab tube 2 leaves the pretreatment device from the third chute 33 . Thus, the slideway is set in a U-shape to ensure that the swab tube 2 enters and exits from one side of the body.

In order to prevent the test tube rack 1 from being detached from the slideway, guard plates 34 are formed on both sides of the slideway. Moreover, since the operation of each station on the second slideway 32 will cause the test tube rack 1 to detach from the slideway, the second slideway 32 can be further provided with a limiting structure. For example, a limit wheel 35 is rotatably connected to the guard plate 34, and a protruding side edge 16 is formed on one side of the base 11 of the test tube rack 1, and the side edge 16 is inserted into the gap between the limit wheel 35 and the slideway, so that the Test tube rack 1 is further limited.

Considering the difficulty of setting, each slideway is respectively provided with a corresponding moving device 4 . As shown in FIG. 5 , the moving device 4 is generally a transmission belt 41 and a driving slider 42. The driving slider 42 is slidably connected to the body and fixed with the transmission belt 41. The driving slider 42 is fixed with a hook 43, and the hook 43 operates from The lower side of the table 3 protrudes to the surface of the work table 3 to abut with the base 11 of the test tube rack 1 , so as to move with the transmission belt 41 , drive the slider 42 to move, and drive the test tube rack 1 to slide along the slideway through the hook 43 .

6-8, the body is fixed with a column 5 on one side of the workbench 3, and a first fixing plate 51 extending to the workbench 3 is fixed on the column 5. The first fixing plate 51 slides through the guide rails. A first sliding table 61 and a second sliding table 62 are connected, the first sliding table 61 is fixed with a protruding upper cutting knife 611, the second sliding table 62 is fixed with a protruding lower cutting knife 621, the upper cutting knife 611 and The lower cutting knives 621 are disposed opposite to each other and have cutting edges formed on adjacent sides. Through the two sliding tables facing each other, the upper cutter 611 and the lower cutter 621 are close to and interlaced with each other, so as to cut off the upper end of the swab tube 2, so that the swab 23 is dropped in the tube body 21, and the upper end of the tube body 21 forms an incision, In order to add diluent and subsequent sampling; through the two slides running opposite to each other, the upper cutter 611 and the lower cutter 621 are separated, and the swab tube 2 continues to advance along the second slideway 32 and enters the subsequent mechanism. In this way, the swab tube 2 can be opened more quickly by cutting.

In order to drive the two sliding tables to move, the first fixed plate 51 is provided with a rotatable first lead screw 63, and two ends of the first lead screw 63 are respectively provided with threaded portions with opposite directions of rotation. The table 62 is respectively connected with two threaded parts, so that the first lead screw 63 is driven to rotate by the pipe cutting motor 631, so that the first sliding table 61 and the second sliding table 62 run in the opposite direction or in the opposite direction, so that the upper cutter 611 and the The lower cutter 621 moves relatively. The lead screw of the present application may be an integral double-ended screw, or two screws with opposite directions of rotation may be spliced together through a coupling. In addition, in addition to using a lead screw to drive the slide table, a driving mechanism such as a magnetic suspension, a compression cylinder, and the like can also be used.

In the process of cutting the tube, in order to separate the upper end of the swab tube 2 cut off as waste, a swingable pusher plate 64 is provided on the upper side of the cutter, and the pusher plate 64 swings so that the lower end of the pusher plate 64 hits the upper end of the swab tube 2 , that is, hitting the upper end of the tube body 21 and the tube plug 22 to separate the waste material from the lower end of the tube body 21 to realize the separation of the swab tube 2 . In addition, the outer cover of the cutter is provided with a material guide cover, and the scraps shot up by the pushing plate 64 slide along the inner cavity of the material guide cover, so as to realize the limitation and recovery of the waste materials, and prevent the waste materials from flying out and hurting the staff.

Specifically, the material guide cover includes an enclosure plate 612 and a guide plate 622. The enclosure plate 612 is fixed on the first sliding table 61, and the guide plate 622 is fixed on the second sliding table 62. The enclosure plate 612 and the guide plate 622 are adjacent to one side. An opening is formed, so that with the cutter cutting the tube, the enclosure plate 612 and the guide plate 622 are closed and covered outside the swab tube 2; as the upper cutter 611 and the lower cutter 621 are separated, the enclosure plate 612 and the guide plate 622 are separated for The swab tube 2 is moved from between the enclosure plate 612 and the guide plate 622 .

The ejector plate 64 is disposed on the enclosure plate 612 . In order to make the ejector plate 64 swing on the enclosure plate 612 , the middle part of the ejector plate 64 and the enclosure plate 612 are connected in a rotatable manner. The upper end of the ejector plate 64 is provided with a first spring 65 as a first elastic member. One end of the first spring 65 is hung on the ejector plate 64, and the other end is hung on the top of the column 5, so that the first spring 65 can cut the tube with the cutter. The upper end of the ejector plate 64 is pulled to swing the ejector plate 64, so that the lower end of the ejector plate 64 knocks the waste material away, so as to eject the upper end of the swab tube 2 that has been cut off. In terms of specific structure, the ejector plate 64 can adopt two rotational connection modes.

The first type is that the enclosure plate 612 is provided with a rotating shaft 613, and the pusher plate 64 is provided with a shaft hole for the rotating shaft 613 to pass through, so that the pusher plate 64 is rotatably connected to the enclosure plate 612, that is, fixed axis connection. However, this method cannot guarantee that the ejector plate 64 hits the swab tube 2 when the model of the swab tube 2 is uncertain, and the flying path of the waste is not clear, so it is the second choice.

In the second type, the enclosure plate 612 is provided with a rotating shaft 613, and the pusher plate 64 is provided with a slotted hole 641 along the length direction. A guide shaft 66 is connected. The guide shaft 66 is arranged parallel to the cutter and perpendicular to the rotating shaft 613, and the end of the guide shaft 66 is hinged to the lower end of the pusher plate 64. The guide shaft 66 limits the advancing direction of the lower end of the pusher plate 64 to ensure the push The lower end of the material plate 64 hits the upper end of the swab tube 2 , and knocks off the cut off waste at the upper end of the swab tube 2 , thereby realizing the separation of the upper end and the lower end of the swab tube 2 . Since the second connection method of the ejector plate 64 can ensure the flying path, it is convenient to recycle the waste material. In addition, the slotted hole 641 can also be arranged on the enclosure plate 612, while the rotating shaft 613 is fixed on the pusher plate 64. By reversing the relationship between the slotted hole 641 and the rotating shaft 613, the pusher plate can still be moved through the movable shaft. 64 swings.

In order to synchronously return the pushing plate 64 that swings when the cutter returns to its position, a return post 67 is fixed on the upright column 5 . Swing in the opposite direction to return to normal, and the return post 67 can also ensure that the first spring 65 is always in a deformed state, preventing the first spring 65 from falling off the upright post 5 and the ejector plate 64 .

In some of the above embodiments, the ejector plate 64 is arranged vertically, so the middle part of the ejector plate 64 is rotatably connected to the enclosure plate 612 , the upper end is provided with a first spring 65 to hold the upper end of the ejector plate 64 , and the lower end is used for hitting waste. However, in addition to arranging the ejector plate 64 vertically, the ejector plate 64 can also be arranged horizontally, or even the ejector plate 64 can be arranged obliquely. The setup is also more complicated. But in the end, the connection method can be summarized as follows: the middle part of the ejector plate 64 is rotatably connected with the surrounding plate 612 , a first elastic member is provided at the end of the ejector plate 64 away from the cutter to hold the ejector plate 64 , and the end of the ejector plate 64 close to the cutter swings The upper end of the swab tube 2 with the knock-off as the waste material.

On the lower side of the guide plate 622, a discharge port 6221 is opened. A material stopper 6222 is provided on the side of the discharge port 6221 away from the pushing plate 64 . A waste box is arranged on the lower side of the discharge port 6221 , and the waste box is fixed between the first slideway 31 , the second slideway 32 and the third slideway 33 , and is used for receiving the waste material discharged from the discharge port 6221 .

With reference to FIGS. 9-10 , the barcode scanning mechanism 7 located upstream of the pipe cutting mechanism 6 is installed on one side of the pipe cutting mechanism 6 . The code scanning mechanism 7 includes a driving wheel 74 arranged on the enclosure plate 612 and a driven wheel 721 arranged on the guide plate 622 . The first sliding table 61 and the second sliding table 62 move toward each other, so that the driving wheel 74 and the driven wheel 721 abut on both sides of the swab tube 2 respectively, and the driving wheel 74 is driven by the scanning motor 741 to drive the swab tube 2 Rotate and scan the swab tube 2 with the camera.

In order to adjust the clamping force of the code scanning mechanism 7 on the swab tube 2 , the initial relative position of the driven wheel 721 relative to the driving wheel 74 can be adjusted. Specifically, a mounting seat 71 is fixedly connected to the side of the guide plate 622 away from the first fixing plate 51 , the mounting seat 71 is slidably connected to the adjusting plate 72 through the guide rail, and the adjusting plate 72 is rotatably connected on the side of the mounting seat 71 close to the swab tube 2 There is a driven wheel 721 . The adjusting plate 72 is screwed with a screw 722 on the side of the mounting seat 71 away from the swab tube 2 , and the end of the screw 722 abuts on the mounting seat 71 . The adjusting plate 72 is provided with a second elastic member on the side of the mounting seat 71 away from the swab tube 2. The two ends of the second spring 73 as the second elastic member are respectively hung on the mounting seat 71 and the adjusting plate 72. The end of the screw rod 722 on the adjusting plate 72 always abuts on the mounting seat 71 . As the screw 722 rotates, the second spring 73 is elastically deformed, and the adjusting plate 72 slides relative to the mounting seat 71 to adjust the initial relative position of the driven wheel 721 relative to the driving wheel 74 .

Moreover, there are two driven pulleys 721 , which are oppositely disposed at the end of the adjusting plate 72 . The driving wheel 74 and the two driven wheels 721 are arranged in a triangle to ensure that the scanning mechanism 7 can clamp the swab tube 2 stably.

The dilution mechanism located downstream of the pipe cutting mechanism 6 is mounted on the first fixing plate 51 . The dilution mechanism includes a filling needle tube 8 , and the filling needle tube 8 is erected on the first fixing plate 51 through a bracket. The swab tube 2 moved to the lower side is filled with diluent through the filling needle 8 to dilute the sample on the swab 23 . In addition, other reagents, such as dyes, etc., can also be added according to the detection requirements.

12-14, the squeezing mechanism 9 is located downstream of the dilution mechanism. Specifically, a second fixing plate 52 extending to the lower side of the worktable 3 is fixedly connected to the upright column 5 , and a first sliding seat 91 and a second sliding seat 92 are slidably connected to the second fixing plate 52 through guide rails. The seat 91 is provided with a protruding first extrusion head 911, the second sliding seat 92 is provided with a protruding second extrusion head 921, the first extrusion head 911 and the second extrusion head 921 Relative settings. The two sliding seats move toward each other, and the two extruding tube pressing heads abut on the outer wall of the swab tube 2 to squeeze and mix the swab tube 2 evenly. With the two sliding seats running opposite to each other, the two extrusion tube pressure heads are separated, and the swab tube 2 continues to advance along the second slideway 32 and enters the subsequent station.

In order to drive the two slides to move, the second fixed plate 52 is provided with a rotatable second lead screw 93, and two ends of the second lead screw 93 are respectively provided with screw parts with opposite directions of rotation. The first slide 91 and the second slide The seats 92 are respectively screwed with the two screw parts, so that the second screw 93 is driven to rotate by the squeezing motor 931, so that the first sliding seat 91 and the second sliding seat 92 run opposite or facing each other, so that the two squeezing heads relative movement.

Moreover, in order to ensure the stability of the swab tube 2 , the squeeze position of the squeeze tube pressure head should be relatively lower, so as to cooperate with the positioning of the guard plate 34 and the test tube rack 1 . Therefore, an escape port 341 is opened on the guard plate 34 , and the escape port 341 is used for the extrusion tube indenter to penetrate through, so that the extrusion tube indenter abuts on the swab tube 2 . In addition, the first squeezing head 911 and the second squeezing head 921 respectively penetrate the through grooves 14 on both sides of the test tube rack 1 to ensure the stability of the swab tube 2 .

Specifically, the sliding seat is provided with a sliding hole, and the sliding hole is used for the extrusion pipe pressing head to penetrate through, so that the extrusion pipe pressing head and the sliding seat are slidably connected. A buffer part is arranged between the squeeze tube indenter and the sliding seat, and the buffer part buffers the impact force of the squeeze tube indenter and the swab tube 2 in contact. The buffer member is a buffer spring 94, which is sleeved outside the squeeze tube pressing head, and a boss 95 is formed at one end of the squeeze tube pressing head close to the swab tube 2, so that the buffer spring 94 is clamped between the boss 95 and the sliding seat.

In addition, in order to prevent the squeeze tube ram from detaching from the sliding seat, a nut 96 is fixed on the end of the sliding seat away from the swab tube 2 of the squeeze tube ram. The indenter is limited. A buffer pad 961 is arranged between the limiting member and the sliding seat, and the buffer pad 961 is sleeved outside the extrusion tube ram, so as to buffer the impact force when the extrusion tube ram returns to its position.

A soft pressing block 951 is embedded on the boss 95 of the extrusion tube pressure head close to one end of the swab tube 2. The soft pressing block 951 is formed with a concave surface 952 that is in contact with the swab tube 2, and the tension of the soft pressing block 951 is increased through the concave surface 952. , to ensure that the soft pressing block 951 is in contact with the swab tube 2, thereby simulating the fingers to squeeze and mix the swab tube 2 evenly.

In order to prevent the swab tube 2 from moving in the process of squeezing the tube, the first sliding seat 91 is provided with a positioning column 97, and the end of the positioning column 97 is close to the swab tube 2 relative to the end of the tube squeezing head; thereby sliding with the first sliding seat 91 Move, the positioning post 97 is in contact with the swab tube 2 before the squeeze tube pressure head, and the swab tube 2 is positioned.

Specifically, the first sliding seat 91 is provided with a mounting hole, and the mounting hole is provided for the positioning column 97 to pass through, so that the positioning column 97 and the first sliding seat 91 are slidably connected. An elastic member is provided between the tube pressing head and the first sliding seat 91 , and the elastic member buffers the impact force of the contact between the positioning post 97 and the swab tube 2 . The elastic member is a compression spring 98 , which is sleeved outside the positioning column 97 . A protrusion is formed on one end of the positioning post 97 close to the swab tube 2, so that the compression spring 98 is clamped between the protrusion and the sliding seat. In addition, in order to prevent the positioning column 97 from disengaging from the first sliding seat 91, the positioning column 97 is also provided with a limiting member and a buffer pad, which will not be repeated.

A cone-shaped pressing block 971 is formed on the protrusion of the positioning post 97 near one end of the swab tube 2, and the cone-shaped pressing block 971 squeezes the outer wall of the swab tube 2 to elastically deform the outer wall of the swab tube 2, so as to press the swab tube 2. position.

In this way, the tube squeezing mechanism 9 first squeezes the swab tube 2 through the movable positioning column 97 to position the swab tube 2; Mix sample and diluent.

To sum up, the pre-processing equipment of the present application completes the pre-processing of the sample in the swab tube 2 by scanning the code, cutting the tube, diluting and squeezing the tube.

It can be understood that the present invention is described by some embodiments, and those skilled in the art know that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, in the teachings of this invention, these features and embodiments may be modified to adapt a particular situation and material without departing from the spirit and scope of the invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of the present application fall within the protection scope of the present invention.

Claims (10)

1. A pretreatment device is characterized by comprising a tube cutting mechanism and a tube extruding mechanism, wherein the tube cutting mechanism comprises an upper cutter and a lower cutter which move relatively, the upper cutter and the lower cutter move relatively to cut the upper end of a swab tube, so that a cut for adding a reagent is formed at the upper end of the swab tube; the tube squeezing mechanism squeezes the swab tube to elastically deform the swab tube so as to uniformly mix the sample and the reagent in the swab tube.

2. The pretreatment apparatus as set forth in claim 1, wherein the cutter is provided at an upper side thereof with a pivotable pusher plate, a lower end of the pusher plate striking an upper end of the swab tube to fly the waste material cut off from the upper end of the swab tube.

3. The pretreatment apparatus according to claim 2, wherein the cutter housing is provided with a material guide cover, and the waste materials thrown away by the pusher plate slide along an inner cavity of the material guide cover.

4. The pretreatment device according to claim 3, wherein the material guide cover comprises a coaming and a guide plate which can move relatively, and an opening is formed at one side of the coaming adjacent to the guide plate; cutting the tube with the cutter, and folding and covering the coaming and the guide plate outside the swab tube; along with the separation of the upper cutter and the lower cutter, the coaming is separated from the guide plate so as to allow the swab tube to move between the coaming and the guide plate.

5. The pretreatment apparatus according to claim 4, wherein the middle portion of the pusher is rotatably connected to the surrounding plate, a first elastic member is provided at an end of the pusher remote from the cutter for pulling the pusher, and an end of the pusher near the cutter is swung for striking away the waste.

6. The pretreatment apparatus according to claim 5, wherein the enclosure plate is provided with a rotating shaft, the pusher plate is provided with a linear hole arranged along the length direction, and the linear hole is penetrated by the rotating shaft; the coaming is connected with a guide shaft in a sliding manner, the tail end of the guide shaft is hinged with the lower end of the material pushing plate, and the guide shaft limits the advancing direction of the lower end of the material pushing plate.

7. The pretreatment apparatus according to claim 4, wherein the enclosure plate is provided with a rotatable driving wheel, and the guide plate is provided with a rotatable driven wheel; the coaming and the guide plate move in opposite directions, so that the driving wheel and the driven wheel are respectively abutted against the two sides of the swab tube, and the driving wheel drives the swab tube to rotate so as to cooperate with the camera to sweep the swab tube.

8. The pretreatment apparatus according to claim 1, wherein the tube extruding mechanism comprises a movable positioning column, and a first tube extruding press head and a second tube extruding press head which can move relatively; the positioning column extrudes the swab tube before the squeezing head of the squeezing tube so as to position the swab tube; the pressing heads of the two squeezing pipes move relatively to squeeze the outer wall of the swab pipe so as to uniformly mix the sample and the reagent in the pipe body.

9. The pretreatment apparatus of claim 8, wherein the extrusion head is slidably connected to the slide; and a buffer piece is arranged between the squeezing head and the sliding seat and buffers the impact force of the squeezing head and the swab pipe in contact.

10. The pretreatment apparatus according to claim 8, wherein the swab tube is placed on a test tube rack; the test tube rack is provided with two protective plates at two sides for the test tube rack to move between the two protective plates; the squeezing head penetrates through the guard plate and the test tube rack and is abutted against the outer wall of the swab tube.

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