Full-automatic packaging and replacing device for modular integrated pipette tip

Abstract

The utility model discloses a full-automatic packaging and replacing device for a modular integrated pipette tip. The full-automatic packaging and replacing device comprises a storage mechanism, a screening mechanism, a conveying mechanism and a detection mechanism, the storage mechanism, the screening mechanism and the conveying mechanism are sequentially arranged from top to bottom. The material storage mechanism comprises a material storage box, a rack plate, a first sliding rail, a first sliding table, a rotating motor, a gear and a discharging baffle. The first sliding rail is horizontally arranged left and right; the rack plate is arranged on the top face of the first sliding rail and movably connected with the first sliding rail through a first sliding table, a tooth groove is formed in the rear side wall of the rack plate, and a plurality of penetrating through grooves are formed in the middle of the top face at intervals. The rotating motor is vertically arranged behind the rack plate; the gear fixedly sleeves an output shaft of the rotating motor; the top face and the bottom face of the material storage box are open, and the material storage box is vertically clamped in the through groove. The top face of the discharging baffle makes contact with the bottom face of the storage box. The device is high in automation degree, high in working efficiency, small in occupied space, large in gun head storage amount and wide in application range.

Description

Technical Field

[0001] The utility model belongs to the technical field of biochemical medical instruments, and in particular relates to a modular integrated liquid transfer gun tip fully automatic assembly replacement device. Background Art

[0002] The pipette is a single-channel micropipette commonly used in biological and chemical laboratories for small-volume transfer. The pipette can be calibrated by the user without the aid of tools, and is easy to disassemble and maintain. The pipette can be used for liquids with high viscosity, high vapor pressure, foaming liquids, etc. Pipettes are widely used in clinical diagnostic laboratories, biotechnology laboratories, pharmaceutical and chemical laboratories, environmental laboratories, and food laboratories.

[0003] As an essential tool for biological breeding and molecular detection, the demand for pipettes has not only increased year by year, but also has high requirements for the working efficiency of pipettes. At present, 4-channel and 8-channel pipettes have gradually become frequent customers of major biological detection companies, and the efficiency of pipette tip boxing has become the biggest limiting factor in the entire process. With the substantial increase in the utilization rate of semi-automatic and fully automatic pipetting workstations, the use of boxed pipette tips has increased exponentially. Due to its efficient and fully automatic detection process, it not only requires the provision of sufficient pre-packed pipette tips in a short period of time, but also requires the accuracy of boxing. The performance of the existing boxing mechanism on the market can no longer meet the use requirements. Moreover, the relevant fields are pursuing higher and higher precision and efficiency of pipetting. The existing gun tip boxing mechanism on the market has a high error rate of missing when boxing, and still requires manual assisted sorting, which is inefficient and can no longer meet market demand. In addition, the existing boxing machines are large in size and cannot be integrated with semi-automatic and fully automatic pipetting workstations. At present, the automatic workstation requires manual replacement and placement of boxed pipette tips, which makes it impossible to achieve long-term unmanned operation of the workstation. Therefore, it is very necessary to develop a modular and integrated pipette tip boxing device to meet market demand. Utility Model Content

[0004] The purpose of the utility model is to provide a modular integrated pipette tip fully automatic assembly replacement device to solve the technical problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A modular integrated fully automatic replacement device for pipette tips, comprising a storage mechanism, a screening mechanism, and a transportation mechanism; the storage mechanism, the screening mechanism, and the transportation mechanism are arranged in sequence from top to bottom, the storage mechanism sends the pipette tips into the screening mechanism, the screening mechanism screens and arranges the pipette tips, and sends them into the transportation mechanism, and the transportation mechanism transports the pipette tips out;

[0007] The material storage mechanism includes a material storage box, a rack plate, a first slide rail, a first slide, a rotating motor, a gear, and a discharging baffle; the first slide rail is horizontally arranged on the left and right; the rack plate is arranged on the top surface of the first slide rail, and is movably connected with the first slide rail through the first slide, the rear side wall of the rack plate is provided with a tooth groove, and the middle part of the top surface is provided with a plurality of through grooves arranged at intervals; the rotating motor is vertically arranged behind the rack plate, and the output shaft faces upward; the gear fixing sleeve is arranged on the output shaft of the rotating motor, and the gear is meshed with the tooth groove of the rack plate; the top and bottom surfaces of the material storage box are open, and the material storage box is vertically clamped in the through groove of the rack plate; the discharging baffle is horizontally fixedly arranged below the material storage box, and its top surface is in contact with the bottom surface of the material storage box.

[0008] Furthermore, the material storage box is provided with 5 through slots corresponding to the rack plate.

[0009] Further, the screening mechanism comprises a screen box assembly and a screen box driving assembly; the screen box assembly comprises a second slide rail, a screen box, and a screen bar; the second slide rail is horizontally arranged on the left and right sides; the front and rear sides of the screen box are slidably connected to the second slide rail through the second slide, the screen box is located below the left side of the discharge baffle, the top and bottom surfaces of the screen box are open, and the lower parts of the left and right sides are respectively provided with a plurality of rectangular openings arranged at intervals; the aperture of the opening in the middle is the smallest, and the apertures of the openings on both sides increase successively; there are a plurality of screen bars, and they are horizontally arranged in the screen box, a plurality of grooves are arranged on the side of the screen bar, and the plurality of grooves are arranged at intervals along the axial direction of the screen bar, and connecting rods are horizontally arranged at both ends of the screen bar, and blocks are fixedly arranged on the connecting rods, and the diameter of the blocks is equal to the aperture of the opening located in the middle position of the screen box, and the blocks at both ends of the screen bar are clamped on the opening of the screen box, and the connecting rods extend outward, and the grooves in the middle of the plurality of screen bars form a circular channel for clamping the gun head; the screen box driving assembly is fixedly connected to the screen box, and the screen box driving assembly drives the screen box to move on the second slide rail.

[0010] Furthermore, the middle screen bar is clamped in the middle opening, the right side wall of the left screen bar is close to the right side wall of the left opening, and the left side wall of the right screen bar is close to the left side wall of the right opening.

[0011] Furthermore, it also includes a variable spacing plate and a movable cylinder. The variable spacing plate is vertically arranged at the lower part of both sides of the screen box, and its side wall is provided with a slide groove corresponding to the opening; the slide groove located in the middle is in a vertical state, and the slide grooves on both sides are inclined outward, and the inclination of the slide grooves on both sides increases successively; the movable cylinder is fixedly arranged at the upper part of the left and right sides of the screen box, and its piston rod is fixedly connected to the variable spacing plate; the connecting rod of the screen bar extends out of the slide groove of the variable spacing plate.

[0012] Furthermore, the screen box driving mechanism includes a mounting plate, a stepper motor, a crank, a connecting rod, and a sliding rod; the mounting plate is arranged horizontally on the left and right sides; the stepper motor is vertically arranged on the rear side of the mounting plate, and its output shaft passes through the mounting plate and can rotate on the mounting plate; the crank is arranged on the front side of the mounting plate, one end of which is fixedly connected to the rotating shaft, and the other end is hinged to the right end of the connecting rod; the sliding rod is arranged horizontally, the right end of which is hinged to the left end of the connecting rod, and the left end is fixedly connected to the screen box.

[0013] Furthermore, it also includes a limit block; the limit block is fixedly arranged on the front side of the mounting plate, and the middle part thereof is movably sleeved on the sliding rod.

[0014] Furthermore, the transport mechanism includes a rotating cylinder, a turntable, a support plate, and a gun tip box; the rotating cylinder is vertically arranged with its piston rod facing upward; the turntable is fixed on the piston rod of the moving cylinder; the support plate is fixed on the turntable horizontally front and back; there are two gun tip boxes, which are spaced apart on the top surface of the support plate.

[0015] Furthermore, a positioning block is provided on the supporting plate.

[0016] Furthermore, it also includes a detection mechanism; the detection mechanism includes a visual detection system; the visual detection is used to detect the screen box and the gun head box.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] 1. The utility model is provided with a material storage mechanism, a screening mechanism and a transportation mechanism. The gun heads are sent to the screening mechanism for screening through the material storage mechanism, and then the screened gun heads are sent to the transportation mechanism. The utility model has a high degree of automation, saves time and labor, has high work efficiency, occupies a small space, has a large amount of gun head material storage, and has a wide range of applications.

[0019] 2. The material storage mechanism of the utility model drives the rack plate to move by rotating the motor and the gear, thereby driving the material storage box to move the material discharging baffle, so that the gun head falls into the screening mechanism. The structure is simple and easy to use.

[0020] 3. The screening mechanism of the utility model drives the screen box assembly to vibrate through the screen box driving assembly, and clamps the gun heads in the screen box in the circular channel formed by the screen bar grooves, and screens and arranges the gun heads to facilitate their delivery into the transport mechanism. The spacing of the screen bars is changed through the variable spacing plate, thereby changing the diameter of the circular channel, so that the gun heads fall into the transport mechanism. The boxing accuracy and efficiency are high, and it can be applied to different gun head specifications, with a wide range of applications and a high degree of automation.

[0021] 4. The transport mechanism of the utility model drives the gun tip box to rotate by rotating the cylinder, rotates the full gun tip box out, and rotates the empty gun tip box to the receiving position, so as to realize continuous transport.

[0022] 5. The utility model monitors the selection and boxing of gun tips in real time by setting up a visual inspection system, eliminating the manual re-inspection process, and has high safety and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the utility model;

[0024] Figure 2 It is the front view of the utility model;

[0025] Figure 3 It is a structural schematic diagram of the material storage mechanism of the utility model;

[0026] Figure 4 It is a rear view of the material storage mechanism of the utility model;

[0027] Figure 5 It is a structural schematic diagram of the screening mechanism of the utility model;

[0028] Figure 6 It is a structural schematic diagram of the screen box assembly of the utility model;

[0029] Figure 7 This is the front view of the screen box of the utility model;

[0030] Figure 8 It is a schematic diagram of the internal structure of the screen box of the utility model;

[0031] Fig. 9 It is a structural schematic diagram of the screen bar of the utility model;

[0032] Fig.10 It is a structural schematic diagram of the variable spacing plate of the utility model;

[0033] Fig.11 It is a structural schematic diagram of the screen box driving assembly of the utility model;

[0034] Fig.12 It is a structural schematic diagram of the transportation mechanism of the utility model;

[0035] Fig.13 It is the front view of the transportation mechanism of the utility model;

[0036] In the accompanying drawings, 1-material storage mechanism; 11-material storage box; 12-rack plate; 121-through slot; 13-first slide rail; 14-first slide table; 15-rotating motor; 16-gear; 17-discharging baffle;

[0037] 2- Screening agency;

[0038] 21-screen box assembly; 211-second slide rail; 212-second slide platform; 213-screen box; 2131-opening; 214-screen bar; 2141-groove; 2142-block; 2143-connecting rod; 215-variable spacing plate; 2151-slideway; 216-moving cylinder;

[0039] 22-screen box driving assembly; 221-mounting plate; 222-stepping motor; 223-crank; 224-connecting rod; 225-sliding rod; 226-limiting block;

[0040] 3-transport mechanism; 31-rotating cylinder; 32-turntable; 33-supporting plate; 34-gun head box. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail with reference to the accompanying drawings and preferred embodiments. However, it should be noted that many details listed in the specification are only for the purpose of enabling readers to have a thorough understanding of one or more aspects of the utility model, and these aspects of the utility model can be realized even without these specific details.

[0042] like Figure 1-13 As shown, a modular integrated fully automatic replacement device for pipette tips comprises a storage mechanism 1, a screening mechanism 2, and a transport mechanism 3; the storage mechanism 1, the screening mechanism 2, and the transport mechanism 3 are arranged on a frame from top to bottom in sequence, the storage mechanism 1 sends the pipette tips into the screening mechanism 2, the screening mechanism 2 screens and arranges the pipette tips, and sends them into the transport mechanism 3, and the transport mechanism 3 transports the pipette tips out;

[0043] like Figure 3-4As shown, the material storage mechanism 1 includes a material storage box 11, a rack plate 12, a first slide rail 13, a first slide 14, a rotating motor 15, a gear 16, and a discharging baffle 17; the first slide rail 13 is horizontally arranged on the top of the frame; the rack plate 12 is movably connected to the first slide rail 13 through the first slide 14, the rear side wall of the rack plate 12 is provided with a tooth groove, and the middle part of the top surface is provided with a plurality of through grooves 121 arranged at intervals; the rotating motor 15 is vertically arranged behind the rack plate 12, and the output shaft faces upward; the gear 16 is fixedly sleeved on the output shaft of the rotating motor 15, and the gear 16 is meshed with the tooth groove of the rack plate 12; the rotating motor 15 and the gear 16 are provided with Two groups are arranged at intervals; the top and bottom surfaces of the material storage box 11 are open and inverted trapezoidal, and the material storage box 11 is vertically clamped in the through groove 121 of the rack plate 12; the discharging baffle 17 is horizontally fixed on the frame, located below the material storage box 11, and its top surface is in contact with the bottom surface of the material storage box 11; the rotating motor 15 is a forward and reverse rotating motor 15. When the rotating motor 15 is running forward, it drives the gear 16 to rotate, and the rotation of the gear 16 drives the rack plate 12 to move, thereby driving the material storage box 11 to move. When the material storage box 11 moves the discharging baffle 17, the gun head in the material storage box 11 falls downward into the screening mechanism 2; when the rotating motor 15 is reversed, it drives the material storage box 11 back to its initial position.

[0044] The material storage boxes 11 are provided with five through slots 121 corresponding to the rack plate 12. Multiple material storage boxes 11 can improve work efficiency and work continuity.

[0045] like Figure 5-11As shown, the screening mechanism 2 includes a screening box assembly 21 and a screening box driving assembly 22; the screening box assembly 21 includes a second slide rail 211, a second slide 212, a screening box 213, and a screening bar 214; the second slide rail 211 is horizontally arranged on the left and right sides; the front and rear sides of the screening box 213 are slidably connected to the second slide rail 211 through the second slide 212, the screening box 213 is located at the lower left side of the discharge baffle 17, the top and bottom surfaces of the screening box 213 are open, and the lower parts of the left and right sides are respectively provided with a plurality of through rectangular openings 2131 arranged at intervals; the aperture of the opening 2131 in the middle is the smallest, and the apertures of the openings 2131 on both sides increase successively; the screening bar 214 is provided with a plurality of grooves 2141 on the side of the screening bar 214, and a plurality of grooves 2141 are provided on both sides of the middle of the screening bar located in the middle, and a plurality of grooves 2141 are provided on the opposite sides of the screening bar 214 at both ends The grooves 2141 are arranged at intervals along the axial direction of the screen bar 214. Connecting rods 2143 are arranged horizontally at both ends of the screen bar 214. A clamping block 2142 is fixed on the connecting rod 2143. The diameter of the clamping block 2142 is equal to the diameter of the opening 2131 located in the middle of the screen box 213. The clamping blocks 2142 at both ends of the screen bar 214 are clamped on the opening 2131 of the screen box 213. The screen bar 214 located in the middle is clamped in the middle opening. In the hole 2131, the right side wall of the left screen bar 214 is close to the right side wall of the left opening 2131, and the left side wall of the right screen bar 214 is close to the left side wall of the right opening 2131. The connecting rod 2143 extends outward, and the grooves 2141 in the middle of the multiple screen bars 214 form a circular channel for clamping the gun head; the screen box driving assembly 22 is fixedly connected to the screen box 213, and the screen box driving assembly 22 drives the screen box 213 to move on the second slide rail 211.

[0046] like Figure 6-10As shown, it also includes a variable spacing plate 215 and a movable cylinder 216. The variable spacing plate 215 is vertically arranged at the lower part of both sides of the screen box 213, and its side wall is provided with a slide groove 2151 opened corresponding to the opening 2131; the slide groove 2151 located in the middle is in a vertical state, and the slide grooves 2151 on both sides are inclined outward, and the inclination of the slide grooves 2151 on both sides increases successively; the movable cylinder 216 is fixedly arranged on the upper part of the left and right sides of the screen box 213, and its piston rod is fixedly connected to the variable spacing plate 215; the connecting rod 2143 of the screen bar 214 extends out of the slide groove 2151 of the variable spacing plate 215. When the gun head is stuck in the circular channel formed by the middle grooves 2141 of the plurality of screen bars 214, the moving cylinder 216 is started, the piston rod of the moving cylinder 216 is extended, and the variable spacing plate 215 is driven to move downward, and the connecting rod 2143 is driven to move, so that the left screen bar 214 moves to the left in the opening 2131, and the right screen bar 214 moves to the right in the opening 2131, so that the spacing between the plurality of screen bars 214 becomes larger, and the diameter of the circular channel formed by the middle groove 2141 becomes larger, so that the gun head stuck in the groove 2141 can fall down; when the moving cylinder 21 When the piston rod contracts, it drives the variable spacing plate 215 to move upward, drives the connecting rod 2143 to move, and makes the left screen bar 214 move rightward in the opening 2131, and the right screen bar 214 move leftward in the opening 2131, so that the spacing between the multiple screen bars 214 becomes smaller, and the diameter of the circular channel formed by the middle groove 2141 becomes smaller, so that the gun head can be clamped again; at the same time, the position of the variable spacing plate 215 on the screen box 213 in the initial state can be adjusted to adjust the diameter of the circular channel formed by the groove 2141, so as to adapt to gun heads of different specifications.

[0047] like Fig.11 As shown, the driving mechanism of the sieve box 213 includes a mounting plate 221, a stepper motor 222, a crank 223, a connecting rod 224, and a slide bar 225; the mounting plate 221 is horizontally arranged on the frame; the stepper motor 222 is vertically arranged on the rear side of the mounting plate 221, and its output shaft passes through the mounting plate 221 and can rotate on the mounting plate 221; the crank 223 is arranged on the front side of the mounting plate 221, one end of which is fixedly connected to the rotating shaft, and the other end is hinged to the right end of the connecting rod 224; the slide bar 225 is horizontally arranged, and its The right end is hinged to the left end of the connecting rod 224, and the left end is fixedly connected to the screen box 213. When the stepper motor 222 is started, the crank 223, the connecting rod 224 and the slide bar 225 drive the screen box 213 to reciprocate on the second slide rail 211, thereby vibrating and shaking the gun head in the screen box 213, so that the gun head can be stuck in the circular channel formed by the middle grooves 2141 of multiple screen bars 214. After a certain period of vibration and shaking, all the gun heads can be stuck one by one in the circular channel formed by the middle grooves 2141 of the screen bars 214.

[0048] It also includes a limit block 226; the limit block 226 is fixedly arranged on the front side of the mounting plate 221, and its middle part is movably sleeved on the slide bar 225 to keep the slide bar 225 in linear motion.

[0049] like Figure 12-13 As shown, the transport mechanism 3 includes a rotating cylinder 31, a turntable 32, a support plate 33, and a gun head box 34; the rotating cylinder 31 is vertically arranged at the lower part of the frame, and its piston rod is upward; the rotating disk 32 is fixed on the piston rod of the moving cylinder 216; the support plate 33 is fixed on the rotating disk 32 horizontally from front to back; the rotating disk 32 of the rotating cylinder 31 can drive the support plate 33 to rotate 180 degrees; there are two gun head boxes 34, which are arranged at intervals on the top surface of the support plate 33, and the receiving groove of the gun head box 34 is connected to the screen box The circular channel positions formed by the grooves 2141 of the screen bars 214 in 213 correspond one to one; in the initial state, the gun tip box 34 is located at the lower left of the screen box 213. When the crank 223, connecting rod 224 and sliding rod 225 of the screen box 213 driving device are in a straight line state, the screen box 213 is just above the front gun tip box 34; when the front gun tip box 34 is full, the rotating cylinder 31 is started, and the turntable 32 drives the supporting plate 33 to rotate 180°, and the empty gun tip box 34 at the rear is turned to the front position to receive the next batch of gun tips.

[0050] The support plate 33 is provided with a positioning block for placing and positioning the gun tip box 34 .

[0051] The rotating motor 15, the stepping motor 222, the moving cylinder 216 and the rotating cylinder 31 are controlled by a single chip microcomputer.

[0052] It also includes a detection mechanism; the detection mechanism includes a visual detection system; the visual detection system detects the screen box 213 and the gun tip box 34. When the visual detection system detects that the gun tips in the screen box 213 are all stuck in the grooves 2141 of the screen bars 214, the movable cylinder 216 is started to contract to make the gun tips fall. When the gun tips have finished falling, the movable cylinder 216 is started to extend to prepare for screening the next batch of gun tips. When the visual monitoring system detects that the gun tip box 34 is full, the rotating cylinder 31 is started to rotate the empty gun tip box 34 to the position of receiving the gun tips.

[0053] The working mode of the utility model is:

[0054] First, the gun tips to be loaded are placed in all the storage boxes 11 of the storage mechanism 1, and the rotating motor 15 is started. The rotating motor 15 drives the gear 16 to rotate, and the gear 16 drives the rack plate 12 to move leftward on the first slide rail 13, so that the storage box 11 moves out of the material discharging baffle 17, and the gun tips in the storage box 11 fall into the screen box 213 from the bottom of the storage box 11. The stepper motor 222 is started, and the stepper motor 222 drives the crank 223 to rotate, and the crank 223 drives the connecting rod 224 to rotate, thereby driving the slide bar 225 to do reciprocating linear motion, so that the screen box 213 reciprocates on the second slide rail 211. After a certain period of time, all the gun tips can be individually stuck in the circular channel formed by the grooves 2141 of the multiple screen bars 214. After the visual inspection system detects that the screening is completed, the stepper motor 222 is controlled to drive the crank 223, the connecting rod 224 and the sliding rod 225 to be in a straight state, and the moving cylinder 216 is started at the same time, so that the piston rod of the moving cylinder 216 is extended, and the variable spacing plate 215 is driven to move downward, so that the spacing of the screen bars 214 becomes larger, thereby increasing the diameter of the circular channel formed by the grooves 2141 of the multiple screen bars 214, so that the gun head falls from the screen box 213 and falls into the gun head box 34 below. After the visual inspection system detects that the gun head has fallen into the gun head, the piston rod of the moving cylinder 216 is controlled to contract, and the variable spacing plate 215 is driven to move upward, and the screen bars 214 are reset to the initial state. Since the receiving slots of the gun head box 34 correspond to the circular channel positions formed by the grooves 2141 of the screen bars 214 in the screen box 213, the gun head can accurately fall into each receiving slot of the gun head box 34, and the gun head can be loaded into the gun head box 34. When the visual inspection system detects that the gun tip box 34 is full, the rotating cylinder 31 is started to drive the turntable 32 to rotate, and the turntable 32 drives the supporting plate 33 to rotate 180°, turning the empty gun tip box 34 to the carrying position, and then taking away the full gun tip box 34 and replacing it with an empty gun tip box 34.

[0055] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A modular integrated automatic replacement device for pipette tips, characterized in that: It includes a material storage mechanism, a screening mechanism, and a transportation mechanism; the material storage mechanism, the screening mechanism, and the transportation mechanism are arranged in sequence from top to bottom, the material storage mechanism sends the pipette tips into the screening mechanism, the screening mechanism screens and arranges the pipette tips, and sends them into the transportation mechanism, and the transportation mechanism transports the pipette tips out; The material storage mechanism includes a material storage box, a rack plate, a first slide rail, a first slide, a rotating motor, a gear, and a discharging baffle; the first slide rail is horizontally arranged on the left and right; the rack plate is arranged on the top surface of the first slide rail, and is movably connected with the first slide rail through the first slide, the rear side wall of the rack plate is provided with a tooth groove, and the middle part of the top surface is provided with a plurality of through grooves arranged at intervals; the rotating motor is vertically arranged behind the rack plate, and the output shaft faces upward; the gear fixing sleeve is arranged on the output shaft of the rotating motor, and the gear is meshed with the tooth groove of the rack plate; the top and bottom surfaces of the material storage box are open, and the material storage box is vertically clamped in the through groove of the rack plate; the discharging baffle is horizontally fixedly arranged below the material storage box, and its top surface is in contact with the bottom surface of the material storage box.

2. A modular integrated pipette tip fully automatic replacement device according to claim 1, characterized in that: The material storage box is provided with 5 through slots corresponding to the rack plate.

3. A modular integrated pipette tip fully automatic replacement device according to claim 1, characterized in that: The screening mechanism comprises a screen box assembly and a screen box driving assembly; the screen box assembly comprises a second slide rail, a screen box, and a screen bar; the second slide rail is horizontally arranged on the left and right sides; the front and rear sides of the screen box are slidably connected to the second slide rail through the second slide, the screen box is located below the left side of the discharge baffle, the top and bottom surfaces of the screen box are open, and the lower parts of the left and right sides are respectively provided with a plurality of rectangular openings arranged at intervals; the aperture of the opening in the middle is the smallest, and the apertures of the openings on both sides increase successively; there are a plurality of screen bars, and they are horizontally arranged in the screen box, a plurality of grooves are arranged on the side of the screen bar, and the plurality of grooves are arranged at intervals along the axial direction of the screen bar, and connecting rods are horizontally arranged at both ends of the screen bar, and a card block is fixedly arranged on the connecting rod, and the diameter of the card block is equal to the aperture of the opening located in the middle position of the screen box, and the card blocks at both ends of the screen bar are clamped on the opening of the screen box, and the connecting rod extends outward, and the grooves in the middle of the plurality of screen bars form a circular channel for clamping the gun head; the screen box driving assembly is fixedly connected to the screen box, and the screen box driving assembly drives the screen box to move on the second slide rail.

4. A modular integrated pipette tip fully automatic replacement device according to claim 3, characterized in that: The screen bar in the middle is clamped in the middle opening, the right side wall of the left screen bar is close to the right side wall of the left opening, and the left side wall of the right screen bar is close to the left side wall of the right opening.

5. A modular integrated pipette tip fully automatic replacement device according to claim 4, characterized in that: It also includes a variable spacing plate and a movable cylinder. The variable spacing plate is vertically arranged at the lower part of both sides of the screen box, and its side wall is provided with a slide groove corresponding to the opening; the slide groove located in the middle is in a vertical state, and the slide grooves on both sides are inclined outward, and the inclination of the slide grooves on both sides increases successively; the movable cylinder is fixedly arranged at the upper part of the left and right sides of the screen box, and its piston rod is fixedly connected to the variable spacing plate; the connecting rod of the screen bar extends out of the slide groove of the variable spacing plate.

6. A modular integrated pipette tip fully automatic replacement device according to claim 3, characterized in that: The screen box driving mechanism includes a mounting plate, a stepper motor, a crank, a connecting rod, and a sliding rod; the mounting plate is arranged horizontally on the left and right sides; the stepper motor is vertically arranged on the rear side of the mounting plate, and its output shaft passes through the mounting plate and can rotate on the mounting plate; the crank is arranged on the front side of the mounting plate, one end of which is fixedly connected to the rotating shaft, and the other end is hinged to the right end of the connecting rod; the sliding rod is arranged horizontally, the right end of which is hinged to the left end of the connecting rod, and the left end is fixedly connected to the screen box.

7. A modular integrated pipette tip fully automatic replacement device according to claim 6, characterized in that: It also includes a limit block; the limit block is fixedly arranged on the front side of the mounting plate, and the middle part thereof is movably sleeved on the slide rod.

8. The modular integrated pipette tip fully automatic replacement device according to claim 1, characterized in that: The transport mechanism comprises a rotating cylinder, a turntable, a supporting plate and a gun head box; the rotating cylinder is vertically arranged with its piston rod facing upward; the turntable is fixed on the piston rod of the moving cylinder; the supporting plate is fixed on the turntable horizontally front and back; there are two gun head boxes, which are spaced apart on the top surface of the supporting plate.

9. A modular integrated pipette tip fully automatic replacement device according to claim 8, characterized in that: A positioning block is arranged on the supporting plate.

10. The modular integrated automatic replacement device for pipette tips according to claim 1, characterized in that: It also includes a detection mechanism; the detection mechanism includes a visual detection system; the visual detection is used to detect the screen box and the gun head box.

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