Liquid injection device and test tube rack

Abstract

The utility model provides a liquid injection device and a test tube rack, and relates to the field of sample testing. The movement table is movably connected with the rack and used for placing a test tube rack, the test tube rack is provided with a containing cavity used for containing test tubes, and the test tube rack is used for driving the test tube rack to move relative to the rack in the first direction; the liquid injection structure is provided with a liquid injection opening and used for injecting liquid into the test tube, and the liquid injection opening can move in the second direction relative to the machine frame; wherein the first direction is not parallel to the second direction. According to the liquid injection device, the liquid injection efficiency can be improved, and the time required by sample measurement can be shortened.

Description

Technical Field

[0001] The utility model relates to the field of solid sample testing, in particular to a liquid injection device and a test tube rack. Background Art

[0002] After ore mining, the composition of ore samples needs to be analyzed. During the analysis process, the samples need to be digested to facilitate subsequent processing and analysis. During the digestion process, reagents are injected into the test tube containing the sample through an injection device to convert the solid sample into a liquid. However, the injection efficiency of the relevant injection device is low, resulting in a long sample testing time. Utility Model Content

[0003] The utility model provides a liquid injection device and a test tube rack, which are used to solve the technical problem of how to improve the liquid injection efficiency and thus shorten the time required for sample testing.

[0004] An embodiment of the present utility model provides a liquid injection device, which includes: a frame; a moving platform movably connected to the frame and used to place a test tube rack, the test tube rack having a receiving cavity for receiving a test tube, and the test tube rack is used to drive the test tube rack to move relative to the frame along a first direction; a liquid injection structure having a liquid injection port for injecting liquid into the test tube, the liquid injection port being movable along a second direction relative to the frame; wherein the first direction and the second direction are not parallel.

[0005] In some embodiments, the motion platform is used to drive the test tube rack to move linearly along the first direction relative to the frame, and the liquid injection port can rotate in a curved line relative to the frame along the second direction, or the motion platform is used to drive the test tube rack to rotate in a curved line relative to the frame along the first direction, and the liquid injection port can move linearly along the second direction relative to the frame.

[0006] In some embodiments, the motion platform is used to drive the test tube rack to rotate along the first direction curve relative to the frame, and the liquid injection port can rotate along the second direction curve relative to the frame; wherein the rotation center axis of the test tube rack and the rotation center axis of the liquid injection port are separated by a preset distance.

[0007] In some embodiments, the rotation direction of the test tube rack is opposite to the rotation direction of the liquid injection port.

[0008] In some embodiments, the motion platform is used to drive the test tube rack to move linearly relative to the frame along the first direction, and the liquid injection structure can move linearly relative to the frame along the second direction.

[0009] In some embodiments, the liquid injection structure includes: a connecting part, which is movably connected to the frame; an injection part, which extends from the outer surface of the connecting part and has the liquid injection port; wherein the connecting part and the liquid injection part have a circulation channel, and the connecting part also has a liquid inlet, and the circulation channel connects the liquid inlet and the liquid injection port.

[0010] In some embodiments, the liquid injection structure further includes: a liquid pump connected to the circulation channel.

[0011] In some embodiments, there are multiple liquid injection ports, and the liquid injection ports are arranged at intervals.

[0012] In some embodiments, the motion platform has at least three positioning columns, the positioning columns are used to be detachably connected to the test tube rack, and the geometric center points of the at least three positioning columns are not located in the same straight line.

[0013] The embodiment of the present invention further provides a test tube rack, which is detachably connected to the moving platform in the liquid injection device as described above, and the test tube rack has a plurality of the accommodating cavities, each of which is arranged in a rectangular array.

[0014] The embodiment of the present invention provides a liquid injection device, which includes a frame, a moving platform movably connected to the frame and used to be detachably connected to a test tube rack, the test tube rack is used to accommodate test tubes, and a liquid injection structure having a liquid injection port for injecting liquid into the test tube and movably connected to the frame, wherein the moving platform can drive the test tube rack to move in a first direction relative to the frame, and the liquid injection port can move in a second direction relative to the frame, the first direction and the second direction are not parallel, and by making the test tube rack and the liquid injection port move in different directions relative to the frame, the relative position between the liquid injection port and the test tube rack is adjusted. The movements can be combined to form more different directions, so that within one movement of the liquid injection and the test tube rack, the liquid injection port can be suspended above each accommodating cavity of the test tube rack, thereby enabling the liquid injection port to inject liquid into the test tubes accommodated in each accommodating cavity more quickly, thereby improving the liquid injection efficiency of the liquid injection device and shortening the time required for sample testing; moreover, compared with the solution of arranging all the movement structures on the liquid injection structure, by arranging the movement structures on the movement platform and the liquid injection structure respectively, the structural complexity of the liquid injection structure and the size of the liquid injection structure can be reduced, thereby reducing the manufacturing cost of the liquid injection device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic structural diagram of a liquid injection device provided in an embodiment of the present utility model;

[0016] Figure 2A schematic diagram of a first type of motion relationship between a test tube rack and a liquid injection port in a liquid injection device provided in an embodiment of the present utility model;

[0017] Figure 3 A schematic diagram of a second motion relationship between the test tube rack and the liquid injection port in the liquid injection device provided in an embodiment of the present utility model;

[0018] Figure 4 A schematic diagram of a third motion relationship between the test tube rack and the liquid injection port in the liquid injection device provided in an embodiment of the present utility model;

[0019] Figure 5 A schematic diagram of a fourth motion relationship between the test tube rack and the liquid injection port in the liquid injection device provided in an embodiment of the present utility model;

[0020] Figure 6 A schematic structural diagram of a liquid injection structure in a liquid injection device provided in an embodiment of the present utility model;

[0021] Figure 7 A cross-sectional view of the liquid injection structure in the liquid injection device provided in an embodiment of the utility model;

[0022] Figure 8 Another cross-sectional view of the liquid injection structure in the liquid injection device provided in an embodiment of the utility model;

[0023] Figure 9 A schematic structural diagram of the liquid injection portion of the liquid injection device provided in an embodiment of the present utility model;

[0024] Figure 10 A schematic diagram of the assembly of the moving platform and the test tube rack in the liquid injection device provided in an embodiment of the present utility model;

[0025] Figure 11 The present invention provides a schematic structural diagram of a test tube rack according to an embodiment of the present invention.

[0026] Description of Reference Numerals

[0027] 10. Liquid injection device; 100. Frame; 110. First guide rail; 120. Second guide rail; 200. Moving table; 220. First guide rail groove; 230. Second rotation axis; 240. Third rotation axis; 250. Mounting hole; 260. Positioning column; 300. Liquid injection structure; 310. Liquid injection port; 320. First rotation axis; 330. Second guide rail groove; 340. Fourth rotation axis; 350. Connecting part; 351. Liquid inlet; 360. Liquid injection part; 370. Circulation channel; 380. Liquid pump; 381. Bracket; 20. Test tube rack; 21. Accommodating chamber; 22. Mounting hole; 31. Hose; 32. Acid storage part. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] The various specific technical features in the various embodiments described in the specific implementation methods can be combined in various ways without contradiction. For example, different implementation methods can be formed by combining different specific technical features. In order to avoid unnecessary repetition, the various possible combinations of the specific technical features in the present invention will not be described separately.

[0030] It should also be noted here that, in order to avoid obscuring the present invention due to unnecessary details, only structures and / or processing steps closely related to the scheme of the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.

[0031] In addition, it should be noted that the terms "include", "comprising" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the following description, the terms "first\second\..." involved are merely used to distinguish different objects and do not indicate that there is any similarity or connection between the objects. It should be understood that the directions described by the directional nouns such as "above", "below", "inside" and "outside" are all directions in normal use.

[0032] In the following specific embodiments, the liquid injection device can be used to digest any type of solid sample. For example, the sample can be an organic material, and the liquid injection device is used to inject an organic solution into a test tube containing the organic material, thereby converting the organic solid material into a liquid based on the principle of like dissolves like. For example, the sample can also be a solid ore, and the liquid injection device is used to inject an acidic liquid into a test tube containing the solid ore, thereby converting the solid ore into a liquid through the corrosive effect of the acidic liquid. For ease of explanation, the structure and function of the liquid injection device are described below using the example of the liquid injection device injecting an acidic liquid into a test tube containing graphite ore.

[0033] In some embodiments, as Figure 1 As shown, the liquid injection device 10 includes: a frame 100, a motion platform 200, and a liquid injection structure 300. The frame 100 is the framework structure of the liquid injection device 10, and is used to provide installation space for other structures of the liquid injection device 10. Optionally, the frame 100 can also be a box structure with an internal storage space, and the other structures of the liquid injection device 10 are all located in the storage space, so that the box structure protects the other structures and prolongs the service life of the other structures.

[0034] The moving platform 200 is movably connected to the frame 100. The moving platform 200 is used to be detachably connected to the test tube rack 20 and to drive the test tube rack 20 to move relative to the frame 100. The test tube rack 20 has a accommodating cavity 21 for accommodating test tubes. By accommodating the test tube in the accommodating cavity 21, the test tube can be detachably connected to the test tube rack 20. For example, when the test tube rack 20 is in use, the accommodating cavity 21 has an opening facing upward in the vertical direction. The test tube is placed into the accommodating cavity 21 through the opening. The inner wall of the accommodating cavity 21 can limit the movement of the test tube perpendicular to the vertical direction and the movement of the test tube downward in the vertical direction. The upward movement of the test tube in the vertical direction is limited by its own gravity, that is, the test tube is reliably accommodated in the accommodating cavity 21. When the test tube needs to be taken out, an upward force can be applied to the test tube in the vertical direction, and the test tube can escape from the accommodating cavity 21 through the opening of the accommodating cavity 21, thereby separating the test tube from the test tube rack 20.

[0035] The liquid injection structure 300 has a liquid injection port 310, which is used to inject acidic liquid into the test tube contained in the containing chamber 21, so that the graphite ore in the test tube is digested by the acidic solution. Specifically, the liquid injection port 310 can move above the opening of the containing chamber 21 and hover above the opening. In this state, the acidic liquid can be output through the liquid injection port 310 to inject the acidic liquid into the test tube contained in the containing chamber. Optionally, the liquid injection structure 300 has a liquid inlet and a circulation channel, and the circulation channel connects the liquid inlet and the liquid injection port 310. The liquid injection structure 300 draws the acidic liquid from the liquid inlet and allows the acidic liquid to flow from the circulation channel to the liquid injection port 310, so that the acidic liquid can be output from the liquid injection port 310; optionally, the liquid injection structure 300 has a liquid storage cavity, and the acidic liquid is contained in the liquid storage cavity. The liquid injection port 310 is connected to the liquid storage cavity, so that the acidic liquid in the liquid storage cavity can be output from the liquid injection port 310.

[0036] Among them, the test tube rack 20 has multiple accommodating cavities 21, each of which can accommodate a test tube. During the liquid injection process, acidic liquid needs to be injected into the test tubes accommodated in each accommodating cavity 21 through the liquid injection structure 300. The liquid injection structure in the relevant liquid injection device can only move in one direction relative to the test tube rack. When the arrangement direction of the accommodating cavities is inconsistent with the movement direction of the liquid injection structure, the liquid injection structure needs to be reciprocated multiple times to complete the liquid injection into each test tube.

[0037] The moving platform 200 in the liquid injection device provided in the embodiment of the present application can drive the test tube rack 20 to move relative to the frame 100 in a first direction (the first direction is as shown in FIG. Figure 1 The liquid injection port 310 can move relative to the frame 100 along the second direction (the second direction is as shown in the solid arrow). Figure 1The first direction and the second direction are not parallel. It can be understood that by making the test tube rack 20 and the liquid injection port 310 move in different directions relative to the rack 100, the relative movement between the liquid injection port 310 and the test tube rack 20 can be combined to form more different directions. Specifically, the test tube rack 20 moves relative to the rack 100 in the first direction to form a first motion vector, and the liquid injection port 310 moves relative to the rack 100 in the second direction to form a second motion vector. Since the first motion vector and the second motion vector are not parallel, by controlling the magnitude and The magnitude of the second motion vector can be such that the vector sum of the first motion vector and the second motion vector forms a total motion vector having various magnitudes and pointing in different directions. That is, by controlling the distance that the test tube rack 20 moves relative to the frame 100 in the first direction and the distance that the liquid injection port 310 moves relative to the frame 100 in the second direction, the liquid injection port 310 can be made to hover at different positions above the test tube rack 20. This allows each test tube to be filled within a single movement stroke of the test tube rack 20 and the liquid injection port 310 without requiring the liquid injection structure 300 to perform multiple reciprocating motions.

[0038] In which, the movement of the liquid injection port 310 relative to the frame 100 is achieved by the movement of the moving part of the liquid injection structure 300 compared to the frame 100. Exemplarily, the liquid injection structure 300 moves as a whole relative to the frame 100, thereby driving the liquid injection port 310 to move relative to the frame 100. Exemplarily, the liquid injection structure 300 includes a fixed part and a movable part, the fixed part is fixedly connected to the frame 100, the movable part is movably connected to the fixed part, and the liquid injection port 310 is arranged on the movable part, thereby driving the liquid injection port 310 to move relative to the frame 100 through the movable part.

[0039] Compared with the solution in which all the moving structures are arranged on the liquid injection structure, one part of the liquid injection structure is moved in one direction, and another part of the liquid injection structure is moved in a direction different from the direction, so that the liquid injection port can hover above each accommodating cavity, the moving structures are arranged on the moving platform 200 and the liquid injection structure 300 respectively, which can also reduce the structural complexity of the liquid injection structure 300 and the size of the liquid injection structure 300, thereby reducing the manufacturing cost of the liquid injection device 1. At the same time, the moving structures are arranged on the moving platform 200 and the liquid injection structure 300 respectively, which can also decouple the movement of the test tube rack 20 and the movement of the liquid injection structure 300, thereby reducing the control difficulty of the liquid injection device.

[0040] It should be noted that the first direction and the second direction can be straight directions or curved directions. The first direction and the second direction are not parallel, which can be understood as the motion trajectory formed by the test tube rack 20 moving along the first direction and the motion trajectory formed by the liquid injection port 310 moving along the second direction are not parallel.

[0041] The embodiment of the present invention provides a liquid injection device, which includes a frame, a moving platform movably connected to the frame and used to be detachably connected to a test tube rack, the test tube rack is used to accommodate test tubes, and a liquid injection structure having a liquid injection port for injecting liquid into the test tube and movably connected to the frame, wherein the moving platform can drive the test tube rack to move in a first direction relative to the frame, and the liquid injection port can move in a second direction relative to the frame, the first direction and the second direction are not parallel, and by making the test tube rack and the liquid injection port move in different directions relative to the frame, the relative position between the liquid injection port and the test tube rack is adjusted. The movements can be combined to form more different directions, so that within one movement of the liquid injection and the test tube rack, the liquid injection port can be suspended above each accommodating cavity of the test tube rack, thereby enabling the liquid injection port to inject liquid into the test tubes accommodated in each accommodating cavity more quickly, thereby improving the liquid injection efficiency of the liquid injection device and shortening the time required for sample testing; moreover, compared with the solution of arranging all the movement structures on the liquid injection structure, by arranging the movement structures on the movement platform and the liquid injection structure respectively, the structural complexity of the liquid injection structure and the size of the liquid injection structure can be reduced, thereby reducing the manufacturing cost of the liquid injection device.

[0042] In some embodiments, as Figure 2 As shown, the motion platform 200 is used to drive the test tube rack 20 relative to the frame 100 along a first direction (the first direction is as shown in FIG. Figure 2 The liquid injection port 310 moves linearly relative to the frame 100 along the second direction (the second direction is as shown in the solid arrow in the middle). Figure 2 The curved rotation (as indicated by the dashed arrow in the middle) can be understood as the test tube rack 20 being moved linearly relative to the frame 100 and the liquid injection port 310 being moved along a curve relative to the frame 100, thereby making the movement direction of the test tube rack 20 relative to the frame 100 and the movement direction of the liquid injection port 310 relative to the frame 100 non-parallel, thereby making it possible to combine the movement of the test tube rack 20 and the movement of the liquid injection port 310 to form different motion vectors, thereby making the liquid injection port 310 able to hover above different accommodating cavities 21 of the test tube rack 20. For example, as Figure 2 As shown, the rack 100 is provided with a first guide rail 110 extending along a first direction, and the moving platform 200 has a first guide rail groove 220. The first guide rail groove 220 is sleeved on the outside of the first guide rail 110 and can slide relative to the first guide rail along the first direction, so that the moving platform 200 can drive the test tube rack 20 to slide relative to the rack 100 along the first direction. The liquid injection structure 300 includes a first rotating shaft 320, and the liquid injection port 310 is provided on the first rotating shaft 320. Through the rotation of the first rotating shaft 320 relative to the rack 100, the liquid injection port 310 is driven to rotate relative to the rack 100.

[0043] In some embodiments, as Figure 3As shown, the motion platform 200 is used to drive the test tube rack 20 relative to the frame 100 along a first direction (the first direction is as shown in FIG. Figure 3 The liquid injection port 310 moves in a curved manner relative to the frame 100 along the second direction (the second direction is as shown in FIG. Figure 3 The linear translation (indicated by the dashed arrow in the middle) can be understood as that by causing the test tube rack 20 to move linearly relative to the frame 100 and causing the liquid injection port 310 to move in a curved motion relative to the frame 100, the movement direction of the test tube rack 20 relative to the frame 100 is not parallel to the movement direction of the liquid injection port 310 relative to the frame, so that the movements of the test tube rack 20 and the liquid injection port 310 can be combined to form motion vectors of different sizes and directions, thereby allowing the liquid injection port 310 to hover above different accommodating cavities 21. Illustratively, the moving table 200 is further provided with a second rotating shaft 230, which is rotatably connected to the frame 100, so that the moving table 200 can drive the test tube rack 20 to rotate relative to the frame 100, and the frame 100 also has a second guide rail 120 extending along the second direction, and the liquid injection structure 300 also has a second guide rail groove 330, which is sleeved on the outside of the second guide rail 120, so that the liquid injection structure 300 can drive the liquid injection port 310 to move linearly relative to the frame 100.

[0044] In some embodiments, as Figure 4 As shown, the motion platform 200 drives the test tube rack 20 relative to the frame along a first direction (the first direction is as shown in FIG. Figure 4 The liquid injection port 310 rotates in a curve relative to the frame 100 along the second direction (the second direction is as shown in FIG. Figure 4 The test tube rack 20 and the liquid injection port 310 are arranged in a curved motion (as shown by the dashed arrow in the middle), wherein the rotation center axis L1 of the test tube rack 20 and the rotation center axis L2 of the liquid injection port 310 are at a preset distance. It can be understood that although the test tube rack 20 and the liquid injection port 310 both rotate relative to the frame 100, their rotation center axes do not coincide, so that the motion trajectories of the two are two non-concentric circles or arcs, thereby making the motion trajectories of the test tube rack 20 and the liquid injection port 310 non-parallel, so that the motion of the test tube rack 20 and the liquid injection port 310 can be combined to form motion vectors of different sizes and directions, thereby enabling the liquid injection port 310 to hover above different accommodating cavities 21. For example, as Figure 4 As shown, the motion stage 200 further includes a third rotation axis 240, which is rotatably connected to the frame 100. The liquid injection structure 300 further includes a fourth rotation axis 340, which is rotatably connected to the frame 100. The third rotation axis 240 and the fourth rotation axis 340 are spaced apart from each other, so that the test tube rack 20 and the liquid injection port 310 can both rotate relative to the frame, and the motion trajectories of the test tube rack 20 and the liquid injection port 310 can form non-concentric circles or arcs.

[0045] Optional, such as Figure 4 As shown, the rotation direction of the test tube rack 20 is opposite to the rotation direction of the liquid injection port 310. It can be understood that when the test tube rack 20 rotates clockwise relative to the frame 100, the liquid injection port 310 rotates counterclockwise relative to the frame 100. The rotation directions of the test tube rack 20 and the liquid injection port 310 can form a faster relative movement speed between the test tube rack 20 and the liquid injection port 310, thereby enabling the liquid injection port 310 to move faster to the top of the accommodating cavity 21 of each test tube rack 20, thereby further accelerating the liquid injection speed.

[0046] In some embodiments, as Figure 5 As shown, the motion platform 200 drives the test tube rack 20 relative to the rack 100 along a first direction (the first direction is as shown in FIG. Figure 5 The liquid injection port 310 moves linearly relative to the frame 100 along the second direction (the second direction is as shown in the solid arrow in the middle). Figure 5 That is, the test tube rack 20 and the liquid injection port 310 move linearly in different directions relative to the frame 100, so that the movements of the test tube rack 20 and the liquid injection port 310 can be combined to form motion vectors of different sizes and directions, thereby enabling the liquid injection port 310 to hover above different accommodating cavities 21.

[0047] Optional, such as Figure 5 As shown, the first direction is perpendicular to the second direction. It can be understood that by making the direction of the linear motion of the test tube rack 20 perpendicular to the direction of the linear motion of the liquid injection port 310, the motion vector of the test tube rack 20 and the motion vector of the liquid injection port 310 can be orthogonal to each other, thereby making it easier to calculate the vector sum of the motion vector of the test tube rack 20 and the motion vector of the liquid injection port 310, thereby reducing the difficulty of controlling the liquid injection device.

[0048] In some embodiments, as Figure 6As shown, the liquid injection structure 300 includes: a connecting portion 350 and a liquid injection portion 360. The connecting portion 350 is movably connected to the frame 100, and the liquid injection portion 360 extends from the outer surface of the connecting portion 350, and the liquid injection portion 360 has a liquid injection port 310. It can be understood that the connecting portion 350 drives the liquid injection portion 360 having the liquid injection port 310 to move relative to the frame 100, and the liquid injection portion extends from the outer surface of the connecting portion 350, which can enable the liquid injection port 310 to be located away from the connecting portion 350, thereby reducing the possibility of the acidic liquid output by the liquid injection port 310 contacting the connecting portion 350, reducing the additional loss caused by the acidic substance adhering to the connecting portion 350, and extending the service life of the connecting portion 350. Optionally, the connecting portion 350 extends in the vertical direction, the liquid injection portion 360 extends in the horizontal direction, and the liquid injection port 310 is arranged at the bottom of the liquid injection portion 360, so that the liquid injection port 310 can face Figure 1 The opening of the accommodating cavity 21 in the.

[0049] Among them, Figure 7 As shown, the connection part 350 and the liquid injection part 360 have a circulation channel 370, and the connection part 350 also has a liquid inlet 351. The circulation channel 370 connects the liquid inlet 351 and the liquid injection port 310. The external acidic liquid can enter the circulation channel 370 through the liquid inlet 351, and the acidic liquid flows from the circulation channel 370 to the liquid injection port 310, so that the acidic liquid is output from the liquid injection port 310. Optionally, the liquid injection structure 300 does not have a liquid pump. The liquid pump is set in an external acidic liquid storage device. The acidic liquid is pumped from the liquid inlet 351 into the circulation channel 370 through the pump body in the acidic liquid storage device, and the acidic liquid is flowed along the circulation channel 370 to the liquid injection port 310, so that the acidic liquid is output from the liquid injection port 310. Optionally, as Figure 7 As shown, the circulation channel 370 is connected to the acid storage member 32 through the hose 31. A liquid pump is provided inside the acid storage member 32. The acid liquid contained in the acid storage member 32 flows into the circulation channel 370 through the hose 31 under the action of the liquid pump.

[0050] In some embodiments, as Figure 8 As shown, the liquid injection structure 300 further includes a liquid pump 380, which is connected to the circulation channel 370. The liquid pump 380 can Figure 7 The liquid inlet 351 draws the external acidic liquid into the circulation channel 370 and makes the acidic liquid flow to the liquid injection port 310, so that the acidic liquid can be discharged from the liquid injection port 310. By setting the self-contained liquid pump 380, the liquid injection device 10 can draw the acidic liquid from the liquid storage device without a pump body, thereby improving the versatility of the liquid injection device 10. Figure 8 As shown, the liquid pump 380 is connected to the bracket 381. Figure 1 The frame 100 is fixedly connected, and the circulation channel 370 is connected to the liquid pump 380 and the acid storage member 32 in sequence through the hose 31. Optionally, there are multiple acid storage members 32, and the number of liquid pumps 380 is the same as the number of acid storage members 32. Each liquid pump 380 is connected to each acid storage member 32 through a hose, so that the liquid pump 380 pumps the acid in each acid storage member 32 into the circulation channel 370.

[0051] In some embodiments, as Figure 9 As shown, there are multiple liquid injection ports 310, each of which is arranged at intervals. Through the multiple liquid injection ports 310 arranged at intervals, acidic liquid can be injected into multiple test tubes at the same time, thereby further improving the liquid injection efficiency and further shortening the time required for sample testing. Optionally, the liquid injection ports 310 are arranged at intervals along the extension direction of the liquid injection portion 360. It can be understood that the liquid injection portion 360 has a larger size in the extension direction. By arranging the liquid injection ports 310 along this extension direction, a larger installation space can be provided for the liquid injection ports 310. Optionally, the liquid injection ports 310 are located at the end of the liquid injection portion 360 away from the connecting portion 350, thereby increasing the distance between the liquid injection ports 310 and the connecting portion 350, further reducing the possibility of the acidic liquid contacting the connecting portion 350, further reducing the additional loss of the acidic liquid, and further extending the service life of the connecting portion 350.

[0052] In some embodiments, as Figure 10 As shown, the moving platform 200 has at least three positioning posts 260. At the same time, the test tube rack 20 has at least three mounting holes 22. Each mounting hole 22 is respectively sleeved on the outside of the positioning posts 260 at the corresponding position, thereby realizing a detachable connection between the test tube rack 20 and the moving platform 200, and the moving platform 200 can drive the test tube rack 20 to move relative to the frame 100. Among them, the geometric center points of at least three positioning posts 260 are not located on the same straight line. It can be understood that the moving platform 200 and the test tube rack 20 are positioned by the mutual cooperation between the positioning posts 260 and the mounting holes 22. The three positioning posts 260 whose geometric center points are not collinear can define a plane. That is, after the mounting holes 22 are respectively sleeved on the outer surface of each positioning post 260, the moving platform 200 and the test tube rack 20 will not move relative to each other in the plane, thereby making the connection between the moving platform 200 and the test tube rack 20 more reliable, and thus making the movement control of the test tube rack 20 more precise.

[0053] The present invention also provides a test tube rack. Figure 11 As shown, the test tube rack 20 is used with the following figures in the specification Figures 1 to 10 The moving table 200 in the liquid injection device shown in any one of the drawings is detachably connected. One implementation of the detachable connection between the test tube rack 20 and the moving table 200 is as follows: Figure 10As shown, no further details will be given here; the test tube rack 20 has multiple cavities 21 for accommodating test tubes, and each cavity 21 is arranged in a rectangular array. It can be understood that multiple cavities 21 are arranged in a third direction to form a row of cavities, and multiple cavities are arranged in a fourth direction to form a rectangular array, wherein the third direction and the fourth direction are perpendicular. By forming multiple cavities 21 in a rectangular array on the test tube rack 20, the space of the test tube rack 20 can be more fully utilized, so that the test tube rack 20 has more cavities 21, and thus the test tube rack 20 can accommodate more test tubes. The above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A liquid injection device, characterized in that: The liquid injection device comprises: frame; a moving platform, movably connected to the frame, for placing a test tube rack, the test tube rack having a receiving cavity for receiving a test tube, and the test tube rack being used to drive the test tube rack to move relative to the frame in a first direction; a liquid injection structure having a liquid injection port for injecting liquid into the test tube, wherein the liquid injection port is movable relative to the frame along a second direction; The first direction and the second direction are not parallel.

2. The liquid injection device according to claim 1, characterized in that The motion platform is used to drive the test tube rack to move linearly relative to the frame along the first direction, and the liquid injection port can rotate in a curved direction relative to the frame along the second direction. or, The moving platform is used to drive the test tube rack to rotate in a curved manner along the first direction relative to the frame, and the liquid injection port can move linearly along the second direction relative to the frame.

3. The liquid injection device according to claim 1, characterized in that The moving platform is used to drive the test tube rack to rotate along the first direction relative to the frame, and the liquid injection port can rotate along the second direction relative to the frame; Wherein, the rotation center axis of the test tube rack is at a preset distance from the rotation center axis of the liquid injection port.

4. The liquid injection device according to claim 3, characterized in that The rotation direction of the test tube rack is opposite to the rotation direction of the liquid injection port.

5. The liquid injection device according to claim 1, characterized in that The moving platform is used to drive the test tube rack to move linearly along the first direction relative to the frame, and the liquid injection structure can move linearly along the second direction relative to the frame.

6. The liquid injection device according to any one of claims 1 to 5, characterized in that: The liquid injection structure comprises: A connecting portion movably connected to the frame; a liquid injection portion extending from an outer surface of the connecting portion and having the liquid injection port; Wherein, the connecting part and the liquid injection part have circulation channels therein, the connecting part also has a liquid inlet, and the circulation channel connects the liquid inlet and the liquid injection port.

7. The liquid injection device according to claim 6, characterized in that The liquid injection structure also includes: A liquid pump is connected to the circulation channel.

8. The liquid injection device according to claim 6, characterized in that There are multiple liquid injection ports, and the liquid injection ports are arranged at intervals.

9. The liquid injection device according to claim 1, characterized in that: The motion platform has at least three positioning columns, which are used to be detachably connected to the test tube rack, and the geometric center points of at least three positioning columns are not located in the same straight line.

10. A test tube rack, characterized in that: The test tube rack is detachably connected to the moving platform of the liquid injection device according to any one of claims 1 to 9, and the test tube rack has a plurality of the accommodating cavities, each of which is arranged in a rectangular array.

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