Automatic needle mounting device for sampler

Abstract

The utility model provides an automatic needle mounting device for a sampler, which comprises a closed shell and a mounting mechanism arranged in the shell, and a vertical insertion tube is arranged at the top of the shell. The mounting mechanism comprises a mounting base, a rotating assembly arranged on the mounting base, a needle head conveying assembly arranged on one side of the rotating assembly and a clamping assembly arranged on one side of the rotating assembly, and the rotating assembly drives the clamping assembly to rotate in the horizontal direction, so that the stroke of the clamping assembly passes through the area below the insertion pipe. The clamping assembly is driven by the rotating assembly to rotate on the horizontal plane, the needle head is conveyed to the bottom of the insertion tube, and the needle head can be fixedly arranged at the bottom end of the sampler in a sleeved mode after the sampler is inserted into the insertion tube. The needle head does not need to be manually unsealed and then installed at the bottom of the sampling device through manual operation, after the old needle head is pulled out and thrown away, the sampling device is inserted into the insertion pipe of the shell, and then the needle head can be installed, so that the working process is simplified, and the efficiency is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sampling equipment, in particular to an automatic needle mounting device for a sampler. Background Art

[0002] Microorganisms include a large group of biological populations such as bacteria, viruses, fungi, and some small protozoa. They are tiny individuals and are closely related to human life. They are widely involved in many fields such as health, medicine, industry, agriculture, and environmental protection. The research on microorganisms has a very positive effect on people's daily lives. It is very necessary to conduct in-depth experimental research on microorganisms. Therefore, it is often necessary to carry out microorganism culture work in the laboratory.

[0003] Microorganism culture refers to the rapid growth and reproduction of certain (species) microorganisms by means of an artificially prepared culture medium and artificially created culture conditions (such as culture temperature, etc.), which is called microorganism culture. Microorganism culture can be divided into pure culture and mixed culture. The former refers to the culture and utilization of a purified single strain; the latter refers to the culture of mixed strains or microorganisms in natural samples (such as soil), and then, according to the types and quantities of microorganisms growing on the culture medium, the diversity and quantity of microorganisms in the soil can be estimated to a certain extent.

[0004] During the process of microorganism culture, it is necessary to regularly check the growth of microorganisms so as to adjust the culture cycle of microorganisms in real time. When checking, it is necessary to use a sampler to sample the microorganisms in containers such as culture dishes. Currently, the sampler is generally a syringe structure, and one end of it is movably plugged and connected with a needle. Sampling is carried out through a disposable needle to avoid cross-contamination. However, during the sampling process, the sampling syringe needs to be replaced each time. But now the sampling equipment requires manual installation of the needle by the staff, which will make the sampling operation very cumbersome and the work efficiency is relatively low. Therefore, a device that can automatically install the needle for the sampler is needed. Content of the Utility Model

[0005] Aiming at the deficiencies in the prior art, the utility model provides an automatic needle mounting device for a sampler, which solves the problems that the existing sampling equipment requires manual installation of the needle by the staff, resulting in very cumbersome sampling operations and relatively low work efficiency.

[0006] According to an embodiment of the present utility model, an automatic needle mounting device for a sampler includes a closed housing and a mounting mechanism disposed inside the housing. A vertical insertion tube is provided at the top of the housing. The top end of the insertion tube penetrates and extends outside the housing, and the bottom end of the insertion tube extends into the housing and is located above the mounting mechanism. The inner diameter of the insertion tube matches the diameter of the sampler. The mounting mechanism includes a mounting base, a rotating assembly disposed on the mounting base, a needle transportation assembly disposed on one side of the rotating assembly, and a clamping assembly disposed on one side of the rotating assembly. The rotating assembly drives the clamping assembly to rotate horizontally, so that the stroke of the clamping assembly passes through the area below the insertion tube.

[0007] Further, the rotating assembly includes a rotating block in a fan-shaped structure. A rotating shaft is fixedly connected to the center of the rotating block. The rotating shaft is rotatably disposed on the mounting base, and one end of the rotating shaft is further connected to a motor.

[0008] Further, an arc-shaped groove penetrating up and down is provided near the outer edge of the rotating block. The arc-shaped groove has the same center as the rotating block. A stop rod vertically penetrating the arc-shaped groove is provided on the mounting base. The rotation angle of the rotating block is limited by the arc-shaped groove through the stop rod.

[0009] Further, the clamping assembly includes a horizontally arranged chuck. The open end of the chuck faces outward along the radial direction of the rotating block. The chuck is an elastic structure, so that the needle can enter from the open end and be vertically clamped inside it.

[0010] Further, the needle transportation assembly includes two vertically arranged conveyor belts arranged in parallel. The distance between the conveyor belts matches the diameter of the top end of the needle. When the two conveyor belts rotate in opposite directions at the same time, the needle clamped between them is driven to move towards the rotating block. The end of the conveyor belt is located on the rotation stroke of the clamping assembly.

[0011] Further, a limiting cylinder is further provided at the position below the stroke of the chuck. The inner diameter of the limiting cylinder is larger than the minimum diameter of the bottom end of the needle, and at the same time, the outer diameter of the limiting cylinder is smaller than the maximum diameter of the top end of the needle, so that the needle is blocked by the limiting cylinder when moving downward.

[0012] Compared with the prior art, the present utility model has the following beneficial effects:

[0013] The utility model drives the clamping assembly to rotate in the horizontal plane through a rotating assembly. When the clamping assembly rotates to the end of the needle transportation assembly, the needle is transported into the clamping assembly for clamping and fixing. Then, the rotating assembly rotates it to the bottom of the cannula. At this time, the needle and the cannula are on the same vertical axis. Inserting the sampler into the housing from the cannula can make the bottom end of the sampler just abut against the needle. Applying downward pressure can fix the needle sleeved on the bottom end of the sampler, realizing the installation of the needle. Finally, the sampler can be taken out of the housing vertically upward. The utility model does not require manual unsealing of the needle and then manual operation to install it at the bottom of the sampler. Only after pulling out and discarding the old needle, inserting the sampler into the cannula of the housing can complete the installation of the needle, thus simplifying the work process and greatly improving the efficiency. Description of the Drawings

[0014] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the utility model.

[0015] Figure 2 It is a schematic diagram of the structure of the installation mechanism in an embodiment of the utility model.

[0016] In the above-mentioned drawings: 1. Housing; 2. Mounting seat; 3. Rotating block; 4. Rotating shaft; 5. Stop bar; 6. Conveyor belt; 7. Chuck; 8. Limiting cylinder; 11. Cannula; 12. Hatch; 31. Arc groove. Detailed Embodiment

[0017] The technical solutions in the utility model will be further described below with reference to the drawings and embodiments.

[0018] As Figure 1 shown, an embodiment of the utility model provides an automatic needle installation device for a sampler, which includes a closed housing 1 and an installation mechanism arranged inside the housing 1. In this embodiment, the housing 1 is of a cuboid structure, and a switchable hatch 12 is also provided on one side of the housing 1 for placing the pre-unsealed needle. A vertical cannula 11 is provided at the top of the housing 1. The top end of the cannula 11 penetrates and extends outside the housing 1, and the bottom end of the cannula 11 extends into the housing 1 and is located above the installation mechanism. The inner diameter of the cannula 11 matches the diameter of the sampler, enabling the sampler to move up and down smoothly in the cannula 11 and being limited by the cannula 11 to avoid lateral movement or inclination, ensuring the correct connection between the sampler and the needle.

[0019] As Figure 2 shown, in this embodiment, the installation mechanism includes a mounting seat 2, a rotating assembly arranged on the mounting seat 2, a needle transportation assembly arranged on one side of the rotating assembly, and a clamping assembly arranged on one side of the rotating assembly. The rotating assembly drives the clamping assembly to rotate in the horizontal direction, so that the stroke of the clamping assembly passes through the area below the cannula 11.

[0020] Specifically, the rotating assembly includes a rotating block 3 with a fan-shaped structure. A rotating shaft 4 is fixedly connected to the center of the rotating block 3. The rotating shaft 4 is rotatably arranged on the mounting base 2, and one end of the rotating shaft 4 is also connected to a motor. Further, an arc-shaped groove 31 penetrating up and down is provided near the outer edge of the rotating block 3. The arc-shaped groove 31 has the same center as the rotating block 3. A stop rod 5 vertically penetrating the arc-shaped groove 31 is provided on the mounting base 2. The stop rod 5 limits the rotation angle of the rotating block 3 through the arc-shaped groove 31. In this embodiment, the motor is a single-phase motor. When the rotating block 3 stops due to being blocked by the baffle, the motor also receives a corresponding resistance. At this time, the motor rotates in reverse, driving the rotating block 3 to rotate in the reverse direction, causing the rotating block 3 to rotate back and forth.

[0021] In a further solution of this embodiment, the clamping assembly includes a horizontally arranged chuck 7. The chucks 7 are arranged side by side on one side edge of the rotating block 3, and the outer edge of the chuck 7 is flush with the rotating block 3. The open end of the chuck 7 faces outward along the radial direction of the rotating block 3. The chuck 7 is of an elastic structure, so that the needle can enter from the open end and be vertically clamped inside.

[0022] Correspondingly, the needle transportation assembly includes two vertically arranged conveyor belts 6 arranged side by side. The distance between the conveyor belts 6 matches the diameter of the top end of the needle. When the two conveyor belts 6 rotate in opposite directions at the same time, they drive the needle clamped between them to move towards the rotating block 3. The end of the conveyor belt 6 is located on the rotation stroke of the clamping assembly. As an option, in this embodiment, the end position of the conveyor belt 6 corresponds to one of the extreme stroke positions of the rotating block 3. At this time, the chuck 7 is exactly aligned with the end of the conveyor belt 6. When the conveyor belt 6 drives the needle to move, the subsequent needle will push the outermost needle into the inside of the chuck 7. When the rotating block 3 is in other stroke positions, the arc-shaped side surface of the outer edge of the transmission block abuts against the end of the conveyor belt 6, forming a blocking effect to prevent the needle from falling out. In addition, before the work of this embodiment starts, the hatch 12 needs to be opened first, and the needles are placed one by one in the conveyor belt 6 so that they are arranged closely adjacent to each other for subsequent work. The conveyor belt 6 can be bent for storing more needles.

[0023] In the preferred solution of this embodiment, a limiting cylinder 8 is further provided at a position below the stroke of the chuck 7. The inner diameter of the limiting cylinder 8 is larger than the minimum diameter of the bottom end of the needle, and at the same time, the outer diameter of the limiting cylinder 8 is smaller than the maximum diameter of the top end of the needle, so that the needle is blocked by the limiting cylinder 8 when moving downward. The limiting cylinder 8 corresponds to the other extreme stroke position of the rotating block 3. At this time, the chuck 7 holds the needle. When it is above the limiting cylinder 8, the sampler is placed into the cannula 11, and then pressed downward. Then the bottom end of the sampler is inserted into the top end of the needle. Since the needle is blocked by the limiting cylinder 8 in the vertical direction, finally the bottom of the sampler and the top of the needle are completely inserted and connected, and then the sampler can be pulled out upward. It should be noted that when the rotating block 3 rotates to the extreme position above the limiting cylinder 8, it will stop, and it is necessary to activate the switch provided outside the housing 1 to make it continue to move, so as to leave sufficient time for the insertion operation of the sampler.

[0024] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the purpose and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention.

Claims

1. A device for automatically installing a needle for a sampler, characterized in that: It includes a closed shell and a mounting mechanism arranged inside the shell, a vertical cannula is arranged on the top of the shell, the top end of the cannula extends through the outside of the shell, and the bottom end of the cannula extends into the shell and is located above the mounting mechanism, and the inner diameter of the cannula matches the diameter of the sampler; the mounting mechanism includes a mounting seat, a rotating assembly arranged on the mounting seat, a needle transport assembly arranged on one side of the rotating assembly, and a clamping assembly arranged on one side of the rotating assembly, the rotating assembly drives the clamping assembly to rotate in the horizontal direction, so that the stroke of the clamping assembly passes through the area below the cannula.

2. The automatic needle installation device for a sampler as claimed in claim 1, characterized in that: The rotating assembly comprises a rotating block of a fan-shaped structure, a rotating shaft is fixedly connected to the center of the rotating block, the rotating shaft is rotatably arranged on a mounting seat, and one end of the rotating shaft is also connected to a motor.

3. The automatic needle installation device for a sampler as claimed in claim 2, characterized in that: The rotating block is provided with an arc groove passing through up and down near the outer edge, the arc groove is co-centered with the rotating block, and a shift rod passing through the arc groove vertically is provided on the mounting seat, and the shift rod limits the rotation angle of the rotating block through the arc groove.

4. The automatic needle installation device for a sampler as claimed in claim 2, characterized in that: The clamping assembly comprises a horizontally arranged clamp, wherein the opening end of the clamp faces outward along the radial direction of the rotating block, and the clamp is an elastic structure so that the needle can enter from the opening end and be vertically clamped inside it.

5. The automatic needle installation device for a sampler as claimed in claim 2, characterized in that: The needle transport assembly includes two conveyor belts arranged vertically in parallel, and the spacing between the conveyor belts matches the diameter of the top of the needle. When the two conveyor belts rotate in opposite directions at the same time, the needle clamped therebetween is driven to move toward the rotating block, and the end of the conveyor belt is located on the rotating stroke of the clamping assembly.

6. The automatic needle installation device for a sampler as claimed in claim 4, characterized in that: A limiting cylinder is also provided below the travel of the chuck, the inner diameter of which is larger than the minimum diameter of the bottom end of the needle, and the outer diameter of which is smaller than the maximum diameter of the top end of the needle, so that the needle is blocked by the limiting cylinder when moving downward.

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