Liquid injection mechanism

Abstract

The utility model provides a liquid injection mechanism. The liquid injection mechanism comprises a mounting frame assembly which comprises a bottom plate and a frame body arranged on the bottom plate; the clamping structure is arranged on the bottom plate and is used for clamping a sample tube; the driving device is in driving connection with the bottom plate so as to drive the bottom plate to do lifting motion relative to the frame body; and / or the driving device is in driving connection with the frame body so as to drive the frame body to do lifting motion relative to the bottom plate; the injection device is arranged on the frame body and used for injecting mercury or oil liquid into the sample tube, the injection device comprises a containing structure, a piston rod and a driving part, the containing structure is provided with a liquid outlet, and the driving part is in driving connection with the piston rod so as to drive the piston rod to do telescopic motion in the containing structure; and the mercury or the oil liquid stored in the accommodating structure is discharged through the liquid outlet. The problem that in the prior art, mercury and hydraulic oil are manually injected into a sample tube, and the operation difficulty of workers is increased is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of mercury intrusion porosimeter testing, and more specifically, to a liquid injection mechanism. Background Art

[0002] Currently, after the low-pressure test of the mercury intrusion porosimeter is completed, a certain amount of mercury needs to be replenished into the sample tube, and then hydraulic oil is added to carry out the high-pressure test. However, the following difficulties usually exist in the above operation process: during the process of manually adding mercury into the sample tube, it is necessary to lift the syringe upward while adding mercury. Due to the large gravity of mercury and the relatively thin diameter of the sample tube (2 mm), it is very difficult to control the adding speed and amount of mercury, and it is extremely easy to cause mercury to overflow from the sample tube.

[0003] To solve the above problems, it is usually necessary to draw out and inject mercury multiple times until a satisfactory height is reached. However, the above operation method not only increases the operation difficulty of the staff, but also there is a phenomenon of mercury overflow. Since mercury is highly toxic and can volatilize at room temperature, it affects the health of the staff. Summary of the Utility Model

[0004] The main purpose of the utility model is to provide a liquid injection mechanism to solve the problem that manually injecting mercury and hydraulic oil into the sample tube in the prior art increases the operation difficulty of the staff.

[0005] To achieve the above purpose, the utility model provides a liquid injection mechanism, including: a mounting frame assembly, including a bottom plate and a frame body provided on the bottom plate; a clamping structure provided on the bottom plate for clamping the sample tube; a driving device drivingly connected to the bottom plate to drive the bottom plate to move up and down relative to the frame body; and / or, the driving device is drivingly connected to the frame body to drive the frame body to move up and down relative to the bottom plate; an injection device provided on the frame body for injecting mercury or oil into the sample tube. The injection device includes a containing structure, a piston rod, and a driving part. The containing structure has a liquid outlet. The driving part is drivingly connected to the piston rod to drive the piston rod to move back and forth in the containing structure to discharge the mercury or oil stored in the containing structure through the liquid outlet; wherein, during the process of the injection device injecting mercury or oil into the sample tube, the driving device drives the bottom plate to drive the clamping structure and the sample tube to descend so that the liquid outlet is in contact with the liquid level of the mercury or oil in the sample tube.

[0006] Further, there are at least two injection devices. At least one containing structure of the injection devices contains mercury, and at least one other containing structure of the injection devices contains oil.

[0007] Further, there are at least two clamping structures. At least two clamping structures are arranged in one-to-one correspondence with at least two injection devices, and each clamping structure is located below its corresponding injection device.

[0008] Further, the sample tube has a preset scale line, and there is a preset distance between the preset scale line and the tube opening of the sample tube. The preset distance is greater than or equal to 0.5 cm and less than or equal to 1.5 cm.

[0009] Further, the frame body includes: a main body, on which the driving device is arranged; a first mounting plate, arranged on the main body or the driving device, and the injection device is detachably arranged on the first mounting plate; a support structure, arranged on the bottom plate for supporting the main body.

[0010] Further, the clamping structure includes: a second mounting plate; a connecting column, one end of the second mounting plate is connected to the bottom plate through the connecting column; a clamping part, arranged at the other end of the second mounting plate, the clamping part has a clamping space, and the size of the clamping space is adjustably arranged for clamping the sample tube.

[0011] Further, the accommodating structure includes: a tube body, the piston rod is movably arranged in the tube body; a needle, connected to the tube body, and the tip of the needle is the liquid outlet.

[0012] Further, the liquid injection mechanism further includes: an image acquisition device for acquiring images at the liquid outlet and at the liquid level of mercury or oil liquid in the sample tube; a control module, electrically connected to the image acquisition device and the driving device; wherein, when the image acquisition device acquires that the liquid outlet is not in contact with the liquid level, the driving device is controlled by the control module to drive the sample tube and / or the injection device to move until the liquid outlet is in contact with the liquid level.

[0013] Further, the liquid injection mechanism further includes: a housing, covering the mounting frame assembly, the clamping structure, the driving device and the injection device, the housing includes a housing body and a door body, the housing body has a mounting opening, and the door body is rotatably arranged at the mounting opening; wherein, at least part of the housing body is made of a metal material; and / or, at least part of the door body is made of a transparent material.

[0014] Further, length scale values and / or volume scale values are arranged on the outer wall of the sample tube; and / or, a control switch is arranged on the housing, and the control switch is electrically connected to the driving device to control the start and stop states of the driving device through the control switch.

[0015] Applying the technical solution of the present utility model, the liquid injection mechanism includes a mounting frame assembly, a clamping structure, a driving device, and an injection device. The mounting frame assembly includes a bottom plate and a frame body provided on the bottom plate. The clamping structure is provided on the bottom plate for clamping a sample tube; the driving device is drivingly connected to the bottom plate to drive the bottom plate to move up and down relative to the frame body; and / or, the driving device is drivingly connected to the frame body to drive the frame body to move up and down relative to the bottom plate. The injection device is provided on the frame body for injecting mercury or oil into the sample tube. The injection device includes a containing structure, a piston rod, and a driving part. The containing structure has a liquid outlet. The driving part is drivingly connected to the piston rod to drive the piston rod to move back and forth in the containing structure to discharge the mercury or oil stored in the containing structure through the liquid outlet. In this way, after the low-pressure test of the mercury intrusion porosimeter is completed, the clamping structure is used to clamp the sample tube, and a quantitative amount of mercury is automatically injected into the sample tube through the injection device. After the injection of mercury is completed, a quantitative amount of oil is automatically injected into the sample tube into which mercury has been injected through the injection device.

[0016] Compared with the prior art in which mercury or hydraulic oil is manually injected into the sample tube, the liquid injection mechanism in the present application can automatically inject mercury and oil into the sample tube, thereby solving the problem in the prior art that manual injection of mercury and hydraulic oil into the sample tube increases the operation difficulty of the staff and reducing the labor intensity of the staff. At the same time, during the process of injecting mercury or oil into the sample tube by the injection device, the driving device drives the bottom plate to drive the clamping structure and the sample tube to descend so that the liquid outlet is in contact with the liquid level of the mercury or oil in the sample tube, and the injection speed and injection amount of the injection device can be automatically controlled, thereby avoiding the overflow of mercury or oil from the sample tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings forming a part of this application are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0018] Figure 1 The three-dimensional structural schematic diagram after removing the outer shell of the embodiment of the liquid injection mechanism according to the present utility model is shown;

[0019] Figure 2 It shows Figure 1 the three-dimensional structural schematic diagram of the liquid injection mechanism in

[0020] Figure 3 It shows Figure 2 the front view of the liquid injection mechanism in

[0021] Among them, the above-mentioned accompanying drawings include the following reference numerals:

[0022] 10. Mounting frame assembly; 11. Base plate; 12. Frame body; 121. Body; 122. First mounting plate; 123. Support structure;

[0023] 20. Clamping structure; 21. Second mounting plate; 22. Connecting column;

[0024] 30. Sample tube;

[0025] 40. Driving device;

[0026] 50. Injection device;

[0027] 60. Outer shell; 61. Shell body; 62. Door body; 63. Handle;

[0028] 70. Control switch. Detailed implementation mode

[0029] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The following will describe the present utility model in detail with reference to the drawings and in combination with the embodiments.

[0030] It should be pointed out that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as those commonly understood by those of ordinary skill in the technical field to which this application belongs.

[0031] In the present utility model, unless otherwise stated, the orientation words such as "upper, lower" are usually in relation to the directions shown in the drawings, or in relation to the vertical, perpendicular or gravitational directions; similarly, for the convenience of understanding and description, "left, right" are usually in relation to the left and right shown in the drawings; "inside, outside" refer to the inside and outside relative to the contours of the respective components, but the above orientation words are not used to limit the present utility model.

[0032] In order to solve the problem in the prior art that manually injecting mercury and hydraulic oil into the sample tube increases the operation difficulty of the staff, this application provides a liquid injection mechanism.

[0033] Such as Figure 1As shown in the figure, the liquid injection mechanism includes a mounting frame assembly 10, a clamping structure 20, a driving device 40, and an injection device 50. The mounting frame assembly 10 includes a bottom plate 11 and a frame body 12 provided on the bottom plate 11. The clamping structure 20 is provided on the bottom plate 11 for clamping the sample tube 30. The driving device 40 is drivingly connected to the bottom plate 11 to drive the bottom plate 11 to move up and down relative to the frame body 12; and / or, the driving device 40 is drivingly connected to the frame body 12 to drive the frame body 12 to move up and down relative to the bottom plate 11. The injection device 50 is provided on the frame body 12 for injecting mercury or oil into the sample tube 30. The injection device 50 includes a receiving structure, a piston rod, and a driving part. The receiving structure has a liquid outlet. The driving part is drivingly connected to the piston rod to drive the piston rod to move back and forth in the receiving structure to discharge the mercury or oil stored in the receiving structure through the liquid outlet. During the process of injecting mercury into the sample tube 30 by the injection device 50, the driving device 40 drives the bottom plate 11 to drive the clamping structure 20 and the sample tube 30 to descend so that the liquid outlet is in contact with the liquid level of the mercury or oil in the sample tube 30.

[0034] Applying the technical solution of this embodiment, after the low-pressure test of the mercury intrusion instrument is completed, the clamping structure 20 is used to clamp the sample tube 30, and a quantitative amount of mercury is automatically injected into the sample tube 30 through the injection device 50. After the injection of mercury is completed, a quantitative amount of oil is automatically injected into the sample tube 30 into which mercury has been injected through the injection device 50.

[0035] Compared with the prior art in which mercury or hydraulic oil is manually injected into the sample tube, the liquid injection mechanism in this embodiment can automatically inject mercury and oil into the sample tube 30, thus solving the problem in the prior art that manual injection of mercury and hydraulic oil into the sample tube increases the operation difficulty of the staff and reducing the labor intensity of the staff. At the same time, during the process of injecting mercury or oil into the sample tube 30 by the injection device 50, the driving device 40 drives the bottom plate 11 to drive the clamping structure 20 and the sample tube 30 to descend so that the liquid outlet is in contact with the liquid level of the mercury or oil in the sample tube 30, and the injection speed and injection amount of the injection device 50 can be automatically controlled, thereby avoiding the overflow of mercury or oil from the sample tube 30.

[0036] Optionally, the driving device 40 is a motor or a piston cylinder.

[0037] Optionally, the piston rod is made of polytetrafluoroethylene or stainless steel.

[0038] In this embodiment, the driving device 40 is drivingly connected to the bottom plate 11 to drive the bottom plate 11 to move up and down relative to the frame body 12. In this way, the driving device 40 drives the bottom plate 11 to drive the clamping structure 20 and the sample tube 30 to move up and down synchronously to realize the automatic lifting of the sample tube 30, thereby improving the intelligent level of the liquid injection mechanism and reducing the labor intensity of the staff.

[0039] In other embodiments not shown in the drawings, the driving device is drivingly connected to the frame to drive the frame to move up and down relative to the bottom plate. In this way, the driving device drives the frame to drive the injection device to move up and down, thereby improving the intelligence level of the liquid injection mechanism and reducing the labor intensity of the staff.

[0040] In other embodiments not shown in the drawings, the driving device is drivingly connected to both the bottom plate and the frame, and can drive the bottom plate and the frame to move up and down synchronously to realize the synchronous lifting of the injection device and the sample tube, so as to ensure that the liquid outlet is always in contact with the liquid level of mercury or oil in the sample tube and prevent mercury or oil from overflowing from the sample tube.

[0041] Optionally, there are at least two injection devices 50. At least one injection device 50 contains mercury in its accommodating structure, and at least one other injection device 50 contains oil in its accommodating structure. In this way, when injecting mercury or oil into the sample tube 30, there is no need to replace the injection device 50. At least one injection device 50 is used for injecting mercury, and at least one other injection device 50 is used for injecting oil, thereby reducing the operation difficulty of the staff.

[0042] In this embodiment, there are two injection devices 50. One injection device 50 contains mercury in its accommodating structure, and the other injection device 50 contains oil in its accommodating structure. After the low-pressure test of the mercury injection instrument is completed, the injection device 50 containing mercury injects a certain amount of mercury into the sample tube 30. After the mercury injection is completed, the injection device 50 containing oil injects a certain amount of oil into the sample tube 30 for subsequent high-pressure testing.

[0043] Optionally, there are at least two clamping structures 20. At least two clamping structures 20 are arranged in one-to-one correspondence with at least two injection devices 50, and each clamping structure 20 is located below the corresponding injection device 50. In this way, each clamping structure 20 can clamp the sample tube 30, and the above setting enables each injection device 50 to have a corresponding clamping structure 20 located below it for mercury injection or oil injection operations.

[0044] In this embodiment, there are two clamping structures 20, and the two clamping structures 20 are arranged in one-to-one correspondence with the two injection devices 50. In this way, after the low-pressure test of the mercury injection instrument is completed, the sample tube 30 is installed on the clamping structure 20 corresponding to the injection device 50 containing mercury to inject a certain amount of mercury into the sample tube 30. After the mercury injection is completed, the sample tube 30 filled with mercury is installed on the clamping structure 20 corresponding to the injection device 50 containing oil to inject a certain amount of oil into the sample tube 30, which is convenient for subsequent high-pressure testing.

[0045] Optionally, the sample tube 30 has preset graduation lines, and there is a preset distance between the preset graduation lines and the mouth of the sample tube 30, where the preset distance is greater than or equal to 0.5 cm and less than or equal to 1.5 cm. In this way, during the process of the injection device 50 injecting mercury or oil into the sample tube 30, the preset graduation lines added on the sample tube 30 can more accurately control the injection amount of mercury or oil, so as to improve the reaction accuracy.

[0046] In this embodiment, the preset distance is 1.0 cm.

[0047] It should be noted that the value of the preset distance is not limited to this, and can be adjusted according to the working conditions and usage requirements. Optionally, the preset distance is 0.8 cm or 1.2 cm.

[0048] As Figure 1 shown, the frame body 12 includes a main body 121, a first mounting plate 122 and a supporting structure 123. Among them, the driving device 40 is arranged on the main body 121, the first mounting plate 122 is arranged on the main body 121 or the driving device 40, and the injection device 50 is detachably arranged on the first mounting plate 122. The supporting structure 123 is arranged on the bottom plate 11 to support the main body 121. In this way, on the one hand, the above settings make the structure of the frame body 12 simpler, easier to process and implement; on the other hand, the structural stability of the main body 121 is improved.

[0049] In this embodiment, the first mounting plate 122 is arranged on the main body 121, and the driving device 40 drives the bottom plate 11 to move up and down.

[0050] In other embodiments not shown in the drawings, the first mounting plate is arranged on the driving device, and the driving device can drive the injection device to move up and down.

[0051] In this embodiment, the supporting structure 123 is a stainless steel column.

[0052] As Figure 1 shown, the clamping structure 20 includes a second mounting plate 21, a connecting column 22 and a clamping part. One end of the second mounting plate 21 is connected to the bottom plate 11 through the connecting column 22. The clamping part is arranged at the other end of the second mounting plate 21, and the clamping part has a clamping space, and the size of the clamping space is adjustable to clamp the sample tube 30. In this way, on the one hand, the above settings make the structure of the clamping structure 20 simpler, easier to process and implement, and reduce the processing cost and difficulty of the clamping structure 20; on the other hand, the versatility of the clamping structure 20 is improved to clamp sample tubes 30 of different sizes and specifications.

[0053] In this embodiment, the clamping part is a sample tube clamp, so that the structure of the clamping part is simpler, easier to process and implement. The sample tube 30 and the bottom plate 11 are arranged perpendicular to each other.

[0054] It should be noted that the structure of the clamping part is not limited to this and can be adjusted according to the working conditions and usage requirements.

[0055] Optionally, the clamping part is a groove structure with a certain depth.

[0056] Optionally, the clamping part is a flat plate with a round hole.

[0057] Optionally, the clamping part is a clamp.

[0058] Optionally, the clamping part clamps the lower end or the middle part of the sample tube 30, so that the clamping position of the clamping part on the sample tube 30 is more flexible to meet different usage requirements and working conditions.

[0059] In this embodiment, the accommodating structure includes a tube body and a needle. Among them, the piston rod is movably arranged in the tube body. The needle is connected to the tube body, and the tip of the needle is the liquid outlet. In this way, the above settings make the injection device 50 a syringe with a needle to accurately control the injection speed and injection volume of the injection device 50.

[0060] In this embodiment, the needle is made of stainless steel.

[0061] Optionally, the liquid injection mechanism further includes an image acquisition device and a control module. The image acquisition device is used to acquire images at the liquid outlet and at the liquid level of mercury or oil in the sample tube 30. The control module is electrically connected to the image acquisition device and the driving device 40. Among them, when the image acquisition device acquires that the liquid outlet is not in contact with the liquid level, the driving device 40 can be controlled by the control module to drive the sample tube 30 and / or the injection device 50 to move until the liquid outlet is in contact with the liquid level. In this way, the above settings facilitate the staff to obtain the positional relationship between the liquid outlet and the liquid level of mercury or oil. When the liquid outlet is not in contact with the liquid level, the operating parameters of the driving device 40 can be controlled by the control module until the sample tube 30 and / or the injection device 50 move to make the liquid outlet in contact with the liquid level, thereby improving the user experience.

[0062] Optionally, the image acquisition device is a camera, which can obtain the positional relationship between the liquid outlet and the liquid level of mercury or oil in real time.

[0063] Such as Figure 2 and Figure 3As shown in the figure, the liquid injection mechanism further includes a housing 60, which covers the mounting frame assembly 10, the clamping structure 20, the driving device 40, and the injection device 50. The housing 60 includes a housing body 61 and a door body 62. The housing body 61 has a mounting opening, and the door body 62 is rotatably provided at the mounting opening. In this way, the above setting of the housing 60 protects the injection device 50 on the one hand to prevent dust and other impurities from falling into the injection device 50; on the other hand, during the injection operation of the injection device 50, the above setting can also prevent the chemical substances volatilized during the reaction from entering the environment and affecting the health of the staff.

[0064] Optionally, at least part of the housing body 61 is made of a metal material; and / or at least part of the door body 62 is made of a transparent material. In this way, the staff can observe the injection situation inside the housing 60 through the door body 62, thereby improving the user experience. At the same time, the above setting of the housing body 61 improves the overall structural strength of the housing 60, thereby extending the service life of the liquid injection mechanism.

[0065] In this embodiment, the housing body 61 is made of a metal material and the door body 62 is made of an acrylic material.

[0066] As Figure 2 shown, a handle 63 is provided on the door body 62 so that the staff can operate the door body 62 through the handle 63.

[0067] Optionally, length scale values and / or volume scale values are provided on the outer wall of the sample tube 30; and / or a control switch 70 is provided on the housing 60. The control switch 70 is electrically connected to the driving device 40 to control the start and stop states of the driving device 40 through the control switch 70. In this way, the above setting of the scale values facilitates the staff to accurately control the mercury or oil content in the sample tube 30 to ensure the accuracy of the results. And the above setting of the control switch 70 facilitates the staff to control the driving device 40 externally, thereby improving the user experience.

[0068] Optionally, the volume of the injection device 50 is 5 ml or 10 ml, and the minimum scale is 0.1 ml.

[0069] Specifically, the working principle of the liquid injection mechanism is as follows:

[0070] After the low-pressure test of the mercury intrusion instrument is completed, take out the sample tube 30 and place it on the left side of the bottom plate 11. The end of the sample tube 30 with a narrow mouth faces upward. Adjust the bottom plate 11 upward so that the needle of the injection device 50 contacts the mercury liquid level in the sample tube 30. Calculate the volume of mercury to be added according to the volume scale, set this volume, and press the control switch 70. The injection device 50 will automatically inject accurately. During the injection process, the piston rod is pushed downward at a certain rate uniformly, and the sample tube 30 descends at a certain speed uniformly, so that the needle can always contact the mercury liquid level until it reaches the 1 cm scale mark. After the mercury injection is completed, move the sample tube 30 to the right side of the bottom plate 11 and set it corresponding to the injection device 50 for storing the oil liquid. Adjust the position of the injection device 50 so that the needle contacts the mercury liquid level in the sample tube 30, then press the control switch 70 to start oil injection. The oil injection height is 1 cm. Note that if bubbles are generated, they need to be removed. After the oil injection is completed, remove the sample tube 30 and perform the high-pressure test according to the regulations.

[0071] From the above description, it can be seen that the above embodiments of the present utility model achieve the following technical effects:

[0072] The liquid injection mechanism includes a mounting frame assembly, a clamping structure, a driving device, and an injection device. The mounting frame assembly includes a bottom plate and a frame body provided on the bottom plate. The clamping structure is provided on the bottom plate for clamping the sample tube; the driving device is drivingly connected to the bottom plate to drive the bottom plate to move up and down relative to the frame body; and / or, the driving device is drivingly connected to the frame body to drive the frame body to move up and down relative to the bottom plate. The injection device is provided on the frame body for injecting mercury or oil liquid into the sample tube. The injection device includes a containing structure, a piston rod, and a driving part. The containing structure has a liquid outlet. The driving part is drivingly connected to the piston rod to drive the piston rod to perform telescopic movement in the containing structure to discharge the mercury or oil liquid stored in the containing structure through the liquid outlet. In this way, after the low-pressure test of the mercury intrusion instrument is completed, use the clamping structure to clamp the sample tube, and automatically inject a certain amount of mercury into the sample tube through the injection device. After the mercury injection is completed, automatically inject a certain amount of oil liquid into the sample tube filled with mercury through the injection device.

[0073] Compared with the prior art in which mercury or hydraulic oil is injected into the sample tube manually, the liquid injection mechanism in the present application can automatically inject mercury and oil liquid into the sample tube, thus solving the problem that manual injection of mercury and hydraulic oil into the sample tube in the prior art increases the operation difficulty of the staff and reducing the labor intensity of the staff. At the same time, since during the process of the injection device injecting mercury or oil liquid into the sample tube, the driving device drives the bottom plate to drive the clamping structure and the sample tube to descend so that the liquid outlet contacts the liquid level of the mercury or oil liquid in the sample tube, and the injection speed and injection amount of the injection device can be automatically controlled, it can avoid mercury or oil liquid overflowing from the sample tube.

[0074] Obviously, the embodiments described above are only a part of the embodiments of the present utility model, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0075] 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 application. As used herein, unless the context clearly indicates otherwise, the singular forms are also intended to include the plural forms. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they specify the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0076] It should be noted that the terms "first", "second", etc. in the description, claims and drawings of the present application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0077] The above description is only the preferred embodiments of the present utility model and is not intended to limit the present utility model. For those skilled in the art, the present utility model can have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A liquid injection mechanism, characterized in that, Comprising: A mounting frame assembly (10), including a bottom plate (11) and a frame body (12) provided on the bottom plate (11); A clamping structure (20), which is provided on the bottom plate (11) for clamping a sample tube (30); A driving device (40), which is drivingly connected to the bottom plate (11) to drive the bottom plate (11) to move up and down relative to the frame body (12); And / or, the driving device (40) is drivingly connected to the frame body (12) to drive the frame body (12) to move up and down relative to the bottom plate (11); An injection device (50), which is provided on the frame body (12) for injecting mercury or oil into the sample tube (30). The injection device (50) includes a receiving structure, a piston rod and a driving part. The receiving structure has a liquid outlet. The driving part is drivingly connected to the piston rod to drive the piston rod to move back and forth in the receiving structure, so as to discharge the mercury or oil stored in the receiving structure through the liquid outlet; Wherein, during the process of the injection device (50) injecting mercury or oil into the sample tube (30), the driving device (40) drives the bottom plate (11) to drive the clamping structure (20) and the sample tube (30) to descend, so that the liquid outlet is in contact with the liquid level of the mercury or oil in the sample tube (30).

2. The liquid injection mechanism according to claim 1, wherein, There are at least two injection devices (50). At least one receiving structure of the injection devices (50) contains mercury, and at least one other receiving structure of the injection devices (50) contains oil.

3. The liquid injection mechanism according to claim 2, wherein, There are at least two clamping structures (20). At least two clamping structures (20) are provided in one-to-one correspondence with at least two injection devices (50). Each clamping structure (20) is located below the corresponding injection device (50).

4. The liquid injection mechanism according to claim 1, characterized in that, The sample tube (30) has a preset scale line. There is a preset distance between the preset scale line and the tube opening of the sample tube (30). The preset distance is greater than or equal to 0.5 cm and less than or equal to 1.5 cm.

5. The liquid injection mechanism according to claim 1, wherein The frame body (12) includes: A main body (121), on which the driving device (40) is provided; A first mounting plate (122), which is provided on the main body (121) or the driving device (40). The injection device (50) is detachably provided on the first mounting plate (122); A support structure (123), which is provided on the bottom plate (11) for supporting the main body (121).

6. The liquid injection mechanism according to claim 1, characterized in that The clamping structure (20) includes: A second mounting plate (21); A connecting column (22), one end of the second mounting plate (21) is connected to the bottom plate (11) through the connecting column (22); A clamping part, which is provided at the other end of the second mounting plate (21). The clamping part has a clamping space, and the size of the clamping space is adjustable for clamping the sample tube (30).

7. The liquid injection mechanism according to claim 1, characterized in that, The accommodating structure includes: a tube body, wherein the piston rod is movably arranged in the tube body; a needle, connected to the tube body, and the tip of the needle is the liquid outlet.

8. The liquid injection mechanism according to claim 1, wherein The liquid injection mechanism further includes: an image acquisition device for acquiring images at the liquid outlet and at the liquid level of mercury or oil liquid in the sample tube (30); a control module electrically connected to the image acquisition device and the driving device (40); wherein, when the image acquisition device acquires that the liquid outlet is not in contact with the liquid level, the driving device (40) is controlled by the control module to drive the sample tube (30) and / or the injection device (50) to move until the liquid outlet is in contact with the liquid level.

9. The liquid injection mechanism according to claim 1, wherein The liquid injection mechanism further includes: a housing (60) covering the mounting frame assembly (10), the clamping structure (20), the driving device (40) and the injection device (50). The housing (60) includes a housing body (61) and a door body (62). The housing body (61) has a mounting opening, and the door body (62) is rotatably arranged at the mounting opening; wherein at least part of the housing body (61) is made of a metal material; and / or at least part of the door body (62) is made of a transparent material.

10. The liquid injection mechanism according to claim 9, wherein a length scale value and / or a volume scale value are arranged on the outer wall of the sample tube (30); and / or a control switch (70) is arranged on the housing (60), and the control switch (70) is electrically connected to the driving device (40) to control the start-stop state of the driving device (40) through the control switch (70).

Images