Liquid adding device and sample processing equipment

Abstract

The utility model provides a liquid adding device and sample processing equipment. The liquid adding device comprises a feeding rotary table and a liquid adding assembly, the feeding rotary table is provided with a plurality of containing frames used for fixing containers to be filled with liquid, and the feeding rotary table is rotationally arranged around the central axis, so that each containing frame can rotate between a liquid adding level and a non-liquid adding level. The liquid adding assembly is arranged above the feeding rotary table, and when the containing frame rotates to the liquid adding level, the liquid adding assembly injects a solution into the container to be subjected to liquid adding. According to the liquid adding device, the feeding rotary table is arranged below the liquid adding assembly and matched with rotation of the feeding rotary table around the central axis, the container to be added with liquid in the containing frame on the feeding rotary table can rotate between the liquid adding level and the non-liquid adding level in a rotating mode, the space below the liquid adding assembly is effectively utilized, and the liquid adding efficiency is improved. And therefore, the space utilization rate is improved, and the whole device is smaller and more exquisite and can be conveniently used in a narrow space.

Description

Technical Field

[0001] The utility model relates to the technical field of experimental equipment, in particular to a liquid adding device and sample processing equipment. Background Art

[0002] In synthesis and drug development experiments, laboratory space is extremely valuable. Saving laboratory floor space will provide more ample operating space for experimenters and greatly reduce safety hazards during operations. The composition of laboratory equipment also follows the design requirements of small size and high throughput. Liquid adding devices are very common in laboratory environments, but traditional liquid adding devices are mostly linear motion devices, that is, liquid is added by linear movement of the bottle or the liquid adding head. Both of these liquid adding methods require space for linear movement. Since these two liquid adding methods require a large movement space for the liquid adding head, the spacing between the bottles is large, resulting in low utilization of the space under the liquid adding head. Therefore, the overall floor space is huge and not suitable for use in the laboratory. Utility Model Content

[0003] In order to at least partially solve the problems existing in the prior art, according to one aspect of the present invention, a liquid adding device is provided, and the technical solution is as follows.

[0004] The liquid adding device includes a loading turntable and a liquid adding assembly; a plurality of placement racks for fixing containers to be added with liquid are arranged on the loading turntable, and the loading turntable is arranged to rotate around the central axis so that each placement rack can rotate between a liquid adding position and a non-liquid adding position; the liquid adding assembly is arranged above the loading turntable, and the liquid adding assembly injects the solution into the container to be added with liquid when the placement rack rotates to the liquid adding position.

[0005] In the utility model, the loading turntable is arranged below the liquid adding component, and cooperates with the rotation setting of the loading turntable around the central axis, so that the container to be added with liquid placed on the placement rack on the loading turntable can be rotated between the liquid adding position and the non-liquid adding position. On the basis that the liquid adding component has sufficient movement space, the distance between the containers to be added with liquid is shortened, and the space below the liquid adding component is effectively utilized, thereby improving space utilization, making the entire device more compact and convenient to use in a narrow space.

[0006] Exemplarily, the liquid adding device also includes an anti-drip component, which can be switched between a liquid receiving position and an avoidance position. When the anti-drip component is switched to the liquid receiving position, it is located between the liquid adding component and the loading turntable to collect the solution dripping from the liquid adding component.

[0007] Exemplarily, the anti-drip component includes a first anti-drip structure and a second anti-drip structure; when the anti-drip component is switched to the liquid receiving position, the first anti-drip structure and the second anti-drip structure are closed together and located below the liquid adding component; when the anti-drip component is switched to the avoidance position, the first anti-drip structure and the second anti-drip structure are unfolded together and located on both sides of the liquid adding component respectively.

[0008] Exemplarily, the first anti-drip structure is connected to a first driving member so that it can move along a first direction or a second direction opposite to the first direction under the drive of the first driving member, and the second anti-drip structure is connected to a second driving member so that it can move along the first direction or the second direction under the drive of the second driving member, so as to realize the first anti-drip structure and the second anti-drip structure to close together or expand with each other.

[0009] Exemplarily, the first anti-drip structure and the second anti-drip structure both include a liquid receiving member, and the liquid receiving member has a liquid receiving groove recessed toward the loading turntable on a surface facing away from the loading turntable.

[0010] Exemplarily, the liquid adding assembly includes a mounting plate and at least one liquid adding needle, which is installed through the mounting plate. When the placement rack rotates to the liquid adding position, the projection of the liquid adding needle on the loading turntable falls into the container to be added fixed on the placement rack.

[0011] Exemplarily, the mounting plate is configured as a semi-enclosed body having a notch, and at least one liquid-filling needle is arranged and distributed along the semi-enclosed body.

[0012] Exemplarily, the mounting plate is connected to a third driving member so that it can move between a first position and a second position in a direction parallel to the central axis under the drive of the third driving member. When the mounting plate is switched to the first position, the adding needle is located inside the container to be added with liquid. When the mounting plate is switched to the second position, the adding needle is located outside the container to be added with liquid.

[0013] Exemplarily, the liquid adding device further includes an origin detector, which determines the origin of the loading turntable by sensing the position of a detection point on the loading turntable.

[0014] Exemplarily, the placement rack is connected to the loading turntable through a quick-change assembly, and the quick-change assembly includes an insertion hole, an elastic latch and a locking groove. The insertion hole is arranged on the loading turntable; the elastic latch is arranged in the insertion hole; the locking groove is arranged on the placement rack and along the circumference of the placement rack; wherein the elastic latch is constructed to: engage with the locking groove in a normal state; and disengage from the locking groove when subjected to external force.

[0015] According to another aspect of the present invention, a sample processing device is provided, comprising a frame on which the liquid adding device as described above is arranged.

[0016] The Summary of the Utility Model introduces a series of simplified concepts, which will be further described in detail in the Detailed Description of the Utility Model. This Summary of the Utility Model does not intend to limit the key features and essential technical features of the claimed technical solution, nor does it intend to determine the scope of protection of the claimed technical solution.

[0017] The advantages and features of the present invention are described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The following drawings of the present invention are used as part of the present invention for understanding the present invention. The drawings show the embodiments of the present invention and their descriptions, and are used to explain the principles of the present invention. In the drawings,

[0019] Figure 1 A perspective view of a liquid adding device according to an exemplary embodiment of the present invention;

[0020] Figure 2 for Figure 1 A right side view of the liquid adding device is shown;

[0021] Figure 3 for Figure 2 AA section view in;

[0022] Figure 4 for Figure 3 Enlarged view of the middle part I;

[0023] Figure 5 for Figure 1 A perspective view of a portion of the liquid addition assembly is shown.

[0024] The above drawings include the following reference numerals:

[0025] 10. Liquid adding device; 110. Feeding turntable; 111. Placement rack; 1111. Insertion column; 112. Detection point; 120. Liquid adding assembly; 121. Mounting plate; 1211. Semi-enclosed body; 122. Liquid adding needle; 123. Third driving member; 130. Indexing motor assembly; 131. Drive motor; 132. Reducer; 133. Output shaft flange; 140. Anti-drip assembly; 141. A drip-proof structure; 142. A second drip-proof structure; 143. A first driving member; 144. A second driving member; 145. A liquid receiving member; 1451. A liquid receiving tank; 150. An origin detector; 151. A detection end face; 160. A quick-change assembly; 161. An insertion hole; 162. An elastic latch; 163. A locking groove; 164. A mounting hole; 20. A container to be added with liquid; X, a first direction; Y, a second direction. DETAILED DESCRIPTION

[0026] In the following description, numerous details are provided to facilitate a thorough understanding of the present invention. However, those skilled in the art will appreciate that the following description merely illustrates preferred embodiments of the present invention, and that the present invention may be practiced without one or more of these details. Furthermore, to avoid confusion with the present invention, some technical features well known in the art have not been described in detail.

[0027] To thoroughly understand the embodiments of the present invention, a detailed structure will be provided in the following description. Obviously, the implementation of the embodiments of the present invention is not limited to the specific details familiar to those skilled in the art. Preferred embodiments of the present invention are described in detail below, but in addition to these detailed descriptions, the present invention may also have other embodiments.

[0028] An embodiment of the present invention provides a liquid adding device. The liquid adding device of the present invention can be applied to a sample processing device. The liquid adding device according to an embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

[0029] See Figure 1 The liquid adding device 10 may include a loading turntable 110 and a liquid adding assembly 120. The loading turntable 110 may be provided with a plurality of racks 111 for fixing the containers 20 to be added with liquid, and the loading turntable 110 may be rotatable about a central axis so that each rack 111 can be rotated between a liquid adding position and a non-liquid adding position. The liquid adding assembly 120 may be disposed above the loading turntable 110, and when the racks 111 rotate to the liquid adding position, the liquid adding assembly 120 may inject solution into the containers 20 to be added with liquid.

[0030] In the present invention, the loading turntable 110 is arranged below the liquid adding component 120. In conjunction with the rotation of the loading turntable 110 around the central axis, the container 20 to be added with liquid placed on the placement rack 111 on the loading turntable 110 can be rotated between the liquid adding position and the non-liquid adding position. Based on the fact that the liquid adding component 120 has sufficient movement space, the distance between the containers 20 to be added with liquid is shortened, and the space below the liquid adding component 120 is effectively utilized, thereby improving space utilization, making the entire device more compact and convenient to use in a small space.

[0031] Furthermore, the feeding turntable 110 is connected to an indexing motor assembly 130. Figure 3The indexing motor assembly 130 may include a drive motor 131, a reducer 132, and an output shaft flange 133. The drive motor 131 and the reducer 132 may be connected, and the output shaft of the reducer 132 may be connected to the output shaft flange 133 via a keyway, and the output shaft flange 133 may be driven to rotate by the drive motor 131. The loading turntable 110 may be connected to the output shaft flange 133 via fasteners such as bolts or screws, thereby allowing the loading turntable 110 to rotate around the central axis driven by the drive motor 131. Here, the drive motor 131 may be a common indexing motor. The indexing motor is a precision motor whose structure mainly includes two parts: a stator and a rotor. The stator is fixed to the frame, and the rotor is mounted on the output shaft. There is a small gap between the stator and the rotor. This gap is the basic unit of indexing. Since the indexing motor is a common motor, it will not be described in detail here. Based on the use of the indexing motor assembly 130, each placement rack 111 can be accurately rotated between the liquid filling position and the non-liquid filling position.

[0032] The placement rack 111 can be generally cylindrical with an opening, which is convenient for placing or taking the container 20 to be added with liquid, and makes the container 20 to be added with liquid have a high stability, so as to avoid the container 20 to be added with liquid from shaking when the loading turntable 110 rotates around the central axis, thereby causing the liquid in the container 20 to be added to splash out, or even causing the container 20 to be added with liquid to be unable to be fully aligned with the liquid adding assembly 120 when the placement rack 111 is rotated to the liquid adding position. The sizes of multiple placement racks 111 can be different to be suitable for placing containers 20 to be added with liquid of various sizes, so that the liquid adding device 10 can be applied to a variety of scenarios, including but not limited to experimental scenarios. The container 20 to be added with liquid can be a bottle or a reagent tube, etc.

[0033] See again Figure 1 The liquid adding device 10 may further include an anti-drip component 140. The anti-drip component 140 is located at the liquid receiving position (e.g. Figure 1 ) and an avoidance position (not shown), and when the anti-drip component 140 is switched to the liquid receiving position, it can be located between the liquid adding component 120 and the loading turntable 110 to collect the solution dripping from the liquid adding component 120. In this way, the anti-drip component 140 collects the liquid dripping from the liquid adding component 120 at the liquid receiving position to prevent cross contamination caused by liquid splashing.

[0034] See again Figure 1The anti-drip liquid component 140 may include a first anti-drip liquid structure 141 and a second anti-drip liquid structure 142. When the anti-drip liquid component 140 is switched to the liquid receiving position, the first anti-drip liquid structure 141 and the second anti-drip liquid structure 142 can be folded together and located below the liquid adding component 120. When the anti-drip liquid component 140 is switched to the avoidance position, the first anti-drip liquid structure 141 and the second anti-drip liquid structure 142 can be unfolded and located on both sides of the liquid adding component 120. The liquid adding component 120 is connected to the liquid by the first anti-drip liquid structure 141 and the second anti-drip liquid structure 142, thereby effectively preventing cross contamination. The switching speed between the liquid receiving position and the avoidance position is fast, which improves the efficiency of movement.

[0035] See again Figure 1 The first drip-proof structure 141 is connected to a first driving member 143 so as to be movable in a first direction X or a second direction Y opposite to the first direction X. The second drip-proof structure 142 is connected to a second driving member 144 so as to be movable in the first direction X or the second direction Y under the drive of the second driving member 144, thereby enabling the first drip-proof structure 141 and the second drip-proof structure 142 to be closed or expanded with each other. The first driving member 143 drives the first drip-proof structure 141 to move in the first direction X, and the second driving member 144 drives the second drip-proof structure 142 to move in the second direction Y until the first drip-proof structure 141 and the second drip-proof structure 142 are closed and located below the liquid adding assembly 120. At this point, the drip-proof assembly 140 switches to the liquid receiving position. The first driving member 143 drives the first anti-drip structure 141 to move along the second direction Y, and the second driving member 144 drives the second anti-drip structure 142 to move along the first direction X, until the first anti-drip structure 141 and the second anti-drip structure 142 are deployed and positioned on either side of the liquid adding assembly 120. At this point, the anti-drip assembly 140 switches to the avoidance position. This effectively prevents cross contamination and improves the efficiency of the movement of the first anti-drip structure 141 and the second anti-drip structure 142. The first driving member 143 and the second driving member 144 can be telescopic cylinders driven by air pressure, although motors, etc., are not excluded.

[0036] See also Figure 1 and Figure 2 The first anti-drip structure 141 and the second anti-drip structure 142 may both include a liquid contact member 145. The liquid contact member 145 may have a liquid receiving groove 1451 on the surface facing away from the loading turntable 110. The liquid is received through the liquid receiving groove 1451, thereby preventing the received liquid from flowing directly out of the liquid contact member 145 and causing cross contamination.

[0037] Again, refer to Figure 1 and Figure 2The liquid adding assembly 120 may include a mounting plate 121 and at least one liquid adding needle 122. The liquid adding needle 122 may be mounted through the mounting plate 121. When the placement rack 111 rotates to the liquid adding position, the projection of the liquid adding needle 122 on the loading turntable 110 may fall into the container 20 to be added, which is fixed to the placement rack 111. In this way, the liquid adding needle 122 is mounted through the mounting plate 121, which enhances the stability of the liquid adding needle 122 and prevents the liquid adding needle 122 from shaking during liquid addition, which may cause liquid to flow outside the container 20 to be added and cause cross contamination.

[0038] See also Figure 2 and Figure 5 , the mounting plate 121 can be constructed as a semi-enclosed body 1211 with a notch, and at least one liquid-adding needle 122 can be arranged and distributed along the semi-enclosed body 1211. In this way, liquid can be added to the container 20 to be added in the placement rack 111 on the loading turntable 110 that rotates around the central axis. Compared with the situation where the liquid-adding needles 122 are distributed along a straight line on the mounting plate 121, the arrangement is compact and space is saved. Since the liquid-adding needles 122 are compactly arranged, the anti-drip assembly 140 facilitates the liquid connection of all the liquid-adding needles 122, preventing the liquid from dripping when the liquid-adding needles 122 move, causing cross contamination. Specifically, as Figure 5 , five liquid adding needles 122 can be provided, and they are arranged at intervals along the circumference of the semi-enclosed body 1211.

[0039] Again, refer to Figure 1 and Figure 2 , the mounting plate 121 is connected to a third driving member 123 so that it can move between a first position and a second position along a direction parallel to the central axis under the drive of the third driving member 123. When the mounting plate 121 is switched to the first position, the adding needle 122 can be located inside the container 20 to be added with liquid. When the mounting plate 121 is switched to the second position, the adding needle 122 can be located outside the container 20 to be added with liquid. When the container 20 to be added with liquid on the placement rack 111 is located at the adding position, the mounting plate 121 can be switched to the first position, and the adding needle 122 can be located inside the container 20 to be added with liquid for adding liquid, effectively avoiding splashing of dripping liquid and causing cross contamination. When the mounting plate 121 is switched to the second position, the anti-drip component 140 can be located at the liquid receiving position, and the adding needle 122 can be located in the liquid receiving groove 1451 of the first anti-drip structure 141 and the second anti-drip structure 142, thereby avoiding cross contamination caused by dripping liquid from the adding needle 122. The mounting plate 121 can be mounted on the third driving member 123 by fasteners such as bolts or screws. The third driving member 123 can be a lifting cylinder, and it is certainly not ruled out that the third driving member 123 can be a lifting motor, etc.

[0040] See also Figure 1 and Figure 3The liquid adding device 10 may further include an origin detector 150 . The origin detector 150 may determine the origin of the loading turntable 110 by sensing the position of a detection point 112 on the loading turntable 110 . Specifically, the detection point 112 can be a groove that is recessed toward the liquid adding component 120 on the wall of the loading turntable 110 away from the liquid adding component 120. The origin detector 150 can be directly set on a frame (not shown) for placing the liquid adding device 10 or indirectly set on the frame. The detection end face 151 of the origin detector 150 faces the wall of the loading turntable 110 away from the liquid adding component 120. When the origin detector 150 identifies the groove, it can output a detection signal to the controller. The controller can adopt a commonly used programmable logic controller. Based on the detection signal feedback from the origin detector 150, the controller can determine the origin of the loading turntable 110 and the rotation angle of the loading turntable 110 to ensure that the liquid adding needle 122 is located directly above the container to be added 20 when adding liquid, thereby realizing that each placement rack 111 can be accurately rotated between the liquid adding position and the non-liquid adding position.

[0041] See also Figure 1 、 Figure 3 and Figure 4 , the placement rack 111 can be connected to the loading turntable 110 through a quick-change assembly 160. The quick-change assembly 160 may include an insertion hole 161, an elastic latch 162 and a locking groove 163. The insertion hole 161 may be provided on the loading turntable 110. The elastic latch 162 may be provided in the insertion hole 161. The locking groove 163 may be provided on the placement rack 111 and along the circumference of the placement rack 111. The elastic latch 162 may be configured to latch with the locking groove 163 in a normal state and to disengage from the locking groove 163 when subjected to external force. In this way, the loading turntable 110 is prevented from rotating the placement rack 111 out during rotation, and at the same time, the loading turntable 110 and the placement rack 111 can be quickly disassembled and assembled through the quick-change assembly 160.

[0042] Specifically, an insertion column 1111 extends from the bottom of the placement rack 111, and a mounting hole 164 is provided on the loading turntable 110. The mounting hole 164 extends from the wall of the loading turntable 110 toward the liquid adding component 120 to the wall away from the liquid adding component 120. The insertion hole 161 extends from the outer side surface of the loading turntable 110 along the radial direction of the loading turntable 110 inward to the point where it is connected to the mounting hole 164. An elastic latch 162 is provided in the insertion hole 161, and the elastic latch 162 can be a plunger with a ball at one end. The locking groove 163 can be provided on the insertion column 1111 extending from the bottom of the placement rack 111, and the locking groove 163 can be a V-shaped groove. Of course, the locking groove 163 can also be a groove of other shapes. In this way, when inserting the insertion column 1111 at the bottom of the placement rack 111 into the installation hole 164, when the outer peripheral surface of the insertion column 1111 contacts the ball of the plunger, the plunger is compressed and the ball is retracted into the insertion hole 161. When the insertion column 1111 is further inserted until the locking groove 163 faces the ball, the plunger rebounds to its normal state under the action of the elastic restoring force, and the ball extends out and engages with the locking groove 163, thereby completing the installation of the placement rack 111. When it is necessary to remove the placement rack 111 from the loading turntable 110, an upward force can be applied to move the insertion column 1111 upward. During the upward movement of the insertion column 1111, the ball gradually disengages from the locking groove 163, thereby completing the rapid disassembly and assembly of the placement rack 111.

[0043] Furthermore, since containers 20 to be added with liquid of different sizes can be placed, corresponding placement racks 111 are installed according to the size or shape of containers 20 to be added with liquid required by the scene, without replacing the entire liquid adding device 10, thereby saving costs.

[0044] like Figure 1 , liquid containers 20 of various sizes are arranged on the loading turntable 110 at the same time to shorten the gap between the liquid containers and save space. The liquid containers 20 can cover the liquid receiving area, and multiple liquid containers 20 can be added at one time, which improves efficiency, reduces the movement of the liquid adding needle 122, and greatly reduces the risk of cross contamination.

[0045] Figures 1 to 5The following describes the operation of the liquid adding device 10 in detail. A robotic arm (not shown) or an operator can place the container 20 to be added into the placement rack 111. The loading turntable 110 then rotates the placement rack 111 to the liquid adding position. The first and second anti-drip structures 141, 142 expand and move from below the liquid adding assembly 120 to either side of the assembly 120. The mounting plate 121 switches from the second position to the first position, and the adding needle 122 moves from outside the container 20 to inside the container 20, beginning to add liquid to the container 20. After the addition is complete, the mounting plate 121 switches from the first position to the second position, and the first and second anti-drip structures 141, 142 close and move from either side of the assembly 120 to below the assembly 120. The loading turntable 110 then rotates to the non-liquid adding position, where the container 20 to be added is loaded and unloaded, and the aforementioned liquid adding operation is repeated.

[0046] According to another aspect of the present invention, a sample processing device is provided. The sample processing device may include a frame, on which the liquid adding device 10 described above may be disposed. Since the liquid adding device 10 described above has the aforementioned beneficial effects, the sample processing device including the liquid adding device 10 described above also has the aforementioned beneficial effects, which will not be further described here.

[0047] In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional words such as "front", "back", "up", "down", "left", "right", "horizontal", "vertical", "vertical", "horizontal", "top", "bottom", etc. are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention; the directional words "inside" and "outside" refer to the inside and outside relative to the outline of each component itself.

[0048] For ease of description, area-relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the regional positional relationship between one or more components or features shown in the figures and other components or features. It should be understood that area-relative terms include not only the orientation of the components as described in the figures, but also different orientations in use or operation. For example, if the components in the drawings are inverted as a whole, the situation where the components are "above other components or features" or "above other components or features" will include the situation where the components are "below other components or structures" or "below other components or structures". Thus, the exemplary term "above" may include both the orientations "above" and "below". In addition, these components or features may also be positioned at other different angles (e.g., rotated 90 degrees or other angles), and this document is intended to include all of these situations.

[0049] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, parts, components and / or combinations thereof.

[0050] It should be noted that the terms "first," "second," and the like in the specification and claims of the present invention and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, such that the embodiments of the present invention described herein can be implemented in an order other than that illustrated or described herein.

[0051] The present invention has been described through the above embodiments. However, it should be understood that the above embodiments are for illustrative and illustrative purposes only and are not intended to limit the present invention to the described embodiments. Furthermore, those skilled in the art will appreciate that the present invention is not limited to the above embodiments and that various variations and modifications may be made based on the teachings of the present invention, all of which fall within the scope of the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A liquid adding device, characterized in that: Including feeding turntable and liquid adding components; The loading turntable is provided with a plurality of racks for fixing containers to be added with liquid, and the loading turntable is arranged to rotate around the central axis so that each rack can rotate between a liquid adding position and a non-liquid adding position; The liquid adding component is arranged above the feeding turntable, and when the placement rack rotates to the liquid adding position, the liquid adding component injects solution into the container to be added with liquid.

2. The liquid adding device according to claim 1, characterized in that The liquid adding device also includes an anti-drip component, which can be switched between a liquid receiving position and an avoidance position. When the anti-drip component is switched to the liquid receiving position, it is located between the liquid adding component and the loading turntable to collect the solution dripping from the liquid adding component.

3. The liquid adding device according to claim 2, characterized in that The drip-proof liquid component includes a first drip-proof liquid structure and a second drip-proof liquid structure; When the drip-proof liquid component is switched to the liquid receiving position, the first drip-proof liquid structure and the second drip-proof liquid structure are closed together and located below the liquid adding component; When the anti-drip component is switched to the avoidance position, the first anti-drip structure and the second anti-drip structure are deployed with each other and are respectively located on both sides of the liquid adding component.

4. The liquid adding device according to claim 3, characterized in that The first anti-drip structure is connected to a first driving member so that it can move along a first direction or a second direction opposite to the first direction under the drive of the first driving member, and the second anti-drip structure is connected to a second driving member so that it can move along the first direction or the second direction under the drive of the second driving member, so as to realize the first anti-drip structure and the second anti-drip structure to close together or expand together.

5. The liquid adding device according to claim 3 or 4, characterized in that: The first anti-drip structure and the second anti-drip structure both include a liquid contacting member, and the liquid contacting member has a liquid contacting groove on a surface facing away from the loading turntable and facing the loading turntable.

6. The liquid adding device according to claim 1, characterized in that The liquid adding component includes a mounting plate and at least one liquid adding needle. The liquid adding needle is installed through the mounting plate, and when the placement rack rotates to the liquid adding position, the projection of the liquid adding needle on the loading turntable falls into the container to be added fixed on the placement rack.

7. The liquid adding device according to claim 6, characterized in that The mounting plate is configured as a semi-enclosed body having a notch, and the at least one liquid-filling needle is arranged and distributed along the semi-enclosed body.

8. The liquid adding device according to claim 6, characterized in that The mounting plate is connected to a third driving member so as to be movable between a first position and a second position along a direction parallel to the central axis under the drive of the third driving member. When the mounting plate is switched to the first position, the adding needle is located inside the container to be added with liquid. When the mounting plate is switched to the second position, the adding needle is located outside the container to be added with liquid.

9. The liquid adding device according to claim 1, characterized in that The liquid adding device further comprises an origin detector, which determines the origin of the loading turntable by sensing the position of a detection point on the loading turntable.

10. The liquid adding device according to claim 1, characterized in that The placement rack is connected to the loading turntable through a quick-change assembly, and the quick-change assembly includes: An inserting hole, the inserting hole being arranged on the feeding turntable; an elastic latching member, the elastic latching member being disposed in the insertion hole; and A locking groove, the locking groove being arranged on the placement rack and arranged along the circumference of the placement rack; Wherein, the elastic latching member is configured to: latch with the locking groove in a normal state; and disengage from the locking groove when subjected to an external force.

11. A sample processing device, comprising a rack, characterized in that: The frame is provided with a liquid adding device as described in any one of claims 1-10.

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