CN216646542U - Liquid sample introduction module - Google Patents
Liquid sample introduction module Download PDFInfo
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- CN216646542U CN216646542U CN202123295676.2U CN202123295676U CN216646542U CN 216646542 U CN216646542 U CN 216646542U CN 202123295676 U CN202123295676 U CN 202123295676U CN 216646542 U CN216646542 U CN 216646542U
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- sample
- injection needle
- cleaning pool
- side wall
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Abstract
The utility model discloses a liquid sample introduction module which comprises a sample disc assembly, a cleaning pool assembly and a sample introduction needle assembly, wherein the sample disc assembly comprises a self-rotating sample disc, and the sample disc is of a cam structure with an inner groove formed in the periphery; the cleaning pool component comprises a cleaning pool and an elastic displacement mechanism, the elastic displacement mechanism is arranged at the lower part of the cleaning pool, the outer side wall of the cleaning pool is tightly contacted with the outer side wall of the sample disc, and the outer side wall of the sample disc drives the cleaning pool to move between the sample injection needle component and the inner groove through a cam; the sample injection needle assembly comprises a sample injection needle and a vertical moving mechanism, and the sample injection needle is connected with the vertical moving mechanism to move up and down relative to the cleaning pool. The utility model has novel and simple structure, realizes the conversion of the circular motion of the sample disc into the linear motion of the cleaning mechanism, can reduce the motion track of the sample injection needle in space, improves the space utilization rate and increases the experiment precision.
Description
Technical Field
The utility model belongs to the technical field of laboratory analysis instruments, and particularly relates to a liquid sample introduction module.
Background
In laboratory analytical instruments, for example, patent 201520999393.1 discloses a liquid autosampler including a rotatable swing arm, a sample injection needle, a sample tray, a cleaning agent container, etc., wherein the sample injection needle is fixed on the swing arm to move up and down and rotate along with the swing arm, so that the sample injection needle absorbs liquid between the sample tray and the cleaning agent container.
The structural design of the cleaning part aiming at the existing sample injection needle is that the structure of a cleaning agent container is designed into a fixed and immovable form, and the structure for loading the sample injection needle is designed into a movable and swingable structure, so that the following defects can be caused by the design:
firstly, the running track of the sample injection needle in the equipment is complex, and comprises movement in the direction of a three-dimensional axis and circular rotation taking a Z axis as an axis. The sample injection needle can be moved to the cleaning position to clean the sample injection needle only by combining the comprehensive motions of the points.
Secondly, the sample injection needle can reach the specified needle washing position only by performing the four-dimensional motion track in the first step, so that the volume of the whole sample injection device is relatively large, and the utilization rate of the equipment space is poor.
And thirdly, because the motion trail is complex, the calculation steps set on the program can be increased, meanwhile, the requirement on the running precision is greatly increased, the probability of misoperation in the running process is also improved, and the precision detection experiment is not facilitated.
In order to overcome the problems, the scheme is developed.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a liquid sample injection module which is novel and simple in structure, reduces the motion track of a sample injection needle in space and improves the space utilization rate.
In order to achieve the above purpose, the solution of the utility model is: a liquid sample introduction module comprises
The sample disc assembly comprises a self-rotating sample disc, and the sample disc is of a cam structure with an inner groove formed in the periphery;
the cleaning pool assembly comprises a cleaning pool and an elastic displacement mechanism, the elastic displacement mechanism is arranged at the lower part of the cleaning pool, the outer side wall of the cleaning pool is tightly contacted with the outer side wall of the sample disc, and the outer side wall of the sample disc drives the cleaning pool to move between the sample injection needle assembly and the inner groove through a cam;
and the sample injection needle assembly comprises a sample injection needle and a vertical moving mechanism, and the sample injection needle is connected with the vertical moving mechanism to move up and down relative to the cleaning pool.
As preferred scheme, elastic displacement mechanism includes base, linear slide rail, compression spring, guide bar, wash the pond lower part and set up the spout, the linear slide rail level sets up on the base, the spout is put into in the linear slide rail cooperation, makes and wash the pond horizontal migration between injection needle subassembly and inner groovy, a each horizontally connected guide bar in spout both sides, the hole of stepping down is seted up at the position that corresponds the guide bar to the base for the guide bar activity is worn to put, compression spring's one end is connected in the hole of stepping down, compression spring's the other end cover is put at the pole body of guide bar.
Preferably, the edge of the inner groove smoothly transitions to the outer side wall of the sample tray.
Preferably, the outer side wall of the cleaning pool is sleeved with an O-shaped ring at a position contacting with the outer side wall of the sample disc.
As the preferred scheme, the injection needle assembly further comprises a frame and a support arm, the vertical moving mechanism comprises a stepping motor, a screw rod and a sliding block, the screw rod is vertically arranged on the frame and connected with the stepping motor, the screw rod is connected with the sliding block, the sliding block is connected with the screw rod in a sliding manner, the sliding block is fixed with the support arm, the support arm extends out of the frame, and the tail end of the support arm is fixed with the injection needle.
As a preferred scheme, a plurality of sample hole sites are arranged on the disc surface of the sample disc at annular intervals and used for placing sample bottles.
After the scheme is adopted, the gain effect of the utility model is as follows:
according to the utility model, the cleaning mechanism is designed to be a moving mechanism capable of linearly reciprocating, and the cam type rotating disc is in close contact with the moving mechanism to form a related follow-up mechanism, so that the circular motion of the sample disc is converted into the linear motion of the cleaning mechanism, the motion dimension requirement on other parts is low, only the sample injection needle is connected with the vertical moving mechanism to move up and down, and two operation steps of sample injection and needle washing can be completed, the moving range in space is greatly reduced, the motion track is reduced, the utilization rate of the space in equipment is improved, the structure is simpler, the program setting is more concise and convenient, the operation precision is high, the probability of experiment failure caused by misoperation is greatly reduced, and the precision detection experiment is facilitated.
Drawings
FIG. 1 is a schematic view of an exploded structure of the present invention;
FIG. 2 is a perspective view of the present invention in an assembled configuration (sampling state);
FIG. 3 is a schematic view of the assembled top view configuration of the present invention in a first (sampling state);
FIG. 4 is a schematic view of the assembled perspective structure of the present invention in the second (cleaning state);
FIG. 5 is a schematic view of the assembled top view of the present invention in the second (cleaning state);
FIG. 6 is a schematic side view of a needle assembly of the present invention;
FIG. 7 is a schematic view of an assembled perspective structure of the cleaning tank assembly of the present invention;
FIG. 8 is a schematic view of an exploded view of the cleaning tank assembly of the present invention;
FIG. 9 is a schematic view of the proximal end of the cleaning basin assembly of the present invention;
FIG. 10 is a schematic view of the remote construction of the cleaning tank assembly of the present invention;
fig. 11 is a schematic perspective view of a sample tray according to the present invention.
Description of reference numerals: 1. a sample tray assembly; 11. a sample tray; 12. an inner groove; 13. sample hole site; 2. a cleaning basin assembly; 21. a cleaning tank; 211. a chute; 212. an O-shaped ring; 22. an elastic displacement mechanism; 221. a base; 222. a linear slide rail; 223. a compression spring; 224. a guide bar; 225. a hole of abdication; 3. a sample injection needle assembly; 31. a sample injection needle; 32. a vertical moving mechanism; 321. a stepping motor; 322. a screw rod; 323. a slider; 33. a frame; 34. a support arm; 4. a sample bottle; 5. a base plate.
Detailed Description
The utility model is described in detail below with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1 and 2, the present invention provides a liquid sample module, which comprises a sample tray assembly 1, a cleaning cell assembly 2 and a sample needle assembly 3. The sample tray assembly 1, the cleaning pool assembly 2 and the injection needle assembly 3 are all mounted on a base plate 5.
The sample tray assembly 1 comprises a self-rotating sample tray 11, the sample tray 11 is rotatably arranged on the bottom plate 5, can be driven to rotate electrically or can be driven to rotate by other modes, as shown in fig. 11, the sample tray 11 is a cam structure with an inner groove 12 formed in the periphery, and a plurality of sample hole sites 13 are formed in the tray surface of the sample tray 11 at annular intervals and used for placing sample bottles 4.
As shown in fig. 7 and 8, the cleaning tank assembly 2 includes a cleaning tank 21 and an elastic displacement mechanism 22, the elastic displacement mechanism 22 is provided at a lower portion of the cleaning tank 21, and, in particular, the elastic displacement mechanism 22 comprises a base 221, a linear slide rail 222, a compression spring 223 and a guide rod 224, wherein the base 221 is fixed on the bottom plate 5, the lower part of the cleaning pool 21 is provided with a sliding groove 211, the linear sliding rail 222 is horizontally arranged on the base 221, the linear sliding rail 222 is matched with the placing sliding groove 211, so that the cleaning pool 21 horizontally moves between the injection needle assembly 3 and the inner groove 12, two sides of the sliding groove 211 are horizontally connected with a guide rod 224 respectively, the base 221 is provided with a abdicating hole 225 at the position corresponding to the guide rod 224, one end of the compression spring 223 is connected in the abdicating hole 225, and the other end of the compression spring 223 is sleeved on the rod body of the guide rod 224. The cleaning pool 21 is linearly moved between two extreme positions, namely a proximal end and a distal end, as shown in fig. 9, when the cleaning pool 21 moves on the linear slide 222 close to the injection needle assembly 3, the compression spring 223 is compressed, and the guide rod 224 horizontally passes through the abdicating hole 225; as shown in fig. 10, when the cleaning cell 21 moves away from the injection needle assembly 3 on the linear slide 222, the compression spring 223 is reset, and the guide rod 224 horizontally exits the offset hole 225.
In this embodiment, combine fig. 1 and fig. 6, injection needle assembly 3 includes frame 33, support arm 34, vertical movement mechanism 32 and injection needle 31, and frame 33 is fixed on bottom plate 5, vertical movement mechanism 32 includes step motor 321, lead screw 322 and slider 323, vertical setting in the frame 33 lead screw 322, lead screw 322 are connected step motor 321, sliding connection on the lead screw 322 slider 323, slider 323 are fixed support arm 34, support arm 34 stretch out in frame 33, and the end of support arm 34 is fixed injection needle 31, vertical movement mechanism 32 drive injection needle 31 and wash pond 21 relatively and reciprocate.
According to the utility model, the cleaning pool 21 moves, the sample disc 11 is driven by cam transmission, the sample disc 11 is designed in a cam structure, the outer side wall of the cleaning pool 21 is tightly contacted with the outer side wall of the sample disc 11, and after the sample disc 11 rotates, the outer side wall of the sample disc 11 can move between the injection needle assembly 3 and the inner groove 12 through the cam transmission cleaning pool 21.
The specific working process of the utility model is as follows:
when the sample injection needle 31 is fixed on the support arm 34, and sample injection is required, as shown in fig. 2 and fig. 3, the sample disk 11 rotates, the outer side wall of the sample disk 11 except the inner groove 12 pushes the cleaning pool 21 to approach the rack 33, the compression spring 223 contracts, the stepping motor 321 is started, the screw rod 322 rotates to drive the sample injection needle 31 on the support arm 34 to descend through the slide block 323 and the support arm 34, so that the sample injection needle 31 can enter the sample bottle 4 for sampling, and after sampling, the sample injection needle 31 ascends and resets; when cleaning is needed, as shown in fig. 4 and 5, the sample tray 11 rotates, the compression spring 223 resets, the cleaning tank 21 is automatically pushed, the frame 33 is embedded into the inner groove 12 of the sample tray 11, the stepping motor 321 is turned on, the screw rod 322 rotates, the slide block 323 and the support arm 34 drive the sample injection needle 31 on the support arm 34 to descend, and therefore the sample injection needle 31 can enter the cleaning tank 21 for cleaning.
In order to allow the cleaning bath 21 to smoothly enter the inner groove 12, the edge of the inner groove 12 smoothly transitions to the outer side wall of the sample tray 11. Further optimizing, an O-shaped ring 212 is sleeved on the outer side wall of the cleaning pool 21 at a position contacting with the outer side wall of the sample disc 11, so that abrasion caused by cam transmission is reduced, and the service life of a product is prolonged.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the design of the present invention, and all equivalent changes made in the design key point of the present invention fall within the protection scope of the present invention.
Claims (6)
1. The utility model provides a liquid advances a kind module which characterized in that: comprises that
The sample disc assembly comprises a self-rotating sample disc, and the sample disc is of a cam structure with an inner groove formed in the periphery;
the cleaning pool assembly comprises a cleaning pool and an elastic displacement mechanism, the elastic displacement mechanism is arranged at the lower part of the cleaning pool, the outer side wall of the cleaning pool is tightly contacted with the outer side wall of the sample disc, and the outer side wall of the sample disc drives the cleaning pool to move between the sample injection needle assembly and the inner groove through a cam;
and the sample injection needle assembly comprises a sample injection needle and a vertical moving mechanism, and the sample injection needle is connected with the vertical moving mechanism to move up and down relative to the cleaning pool.
2. The liquid sample introduction module according to claim 1, wherein: elastic displacement mechanism includes base, linear slide rail, compression spring, guide bar, wash the pond lower part and set up the spout, the linear slide rail level sets up on the base, the spout is put into in the linear slide rail cooperation, makes and wash the pond horizontal migration between injection needle subassembly and inner groovy, each horizontally connected guide bar in spout both sides, the hole of stepping down is seted up at the position that corresponds the guide bar to the base for the guide bar activity is worn to put, compression spring's one end is connected in the hole of stepping down, compression spring's the other end cover is put at the pole body of guide bar.
3. The liquid sample introduction module according to claim 1, wherein: the edge of the inner groove smoothly transits to the outer side wall of the sample disc.
4. The liquid sample introduction module according to claim 1, wherein: an O-shaped ring is sleeved on the outer side wall of the cleaning pool at the position contacted with the outer side wall of the sample disc.
5. The liquid sample introduction module according to claim 1, wherein: the injection needle assembly further comprises a frame and a support arm, the vertical moving mechanism comprises a stepping motor, a lead screw and a sliding block, the lead screw is vertically arranged on the frame, the lead screw is connected with the stepping motor, the lead screw is connected with the sliding block, the sliding block is fixed with the support arm, the support arm extends out of the frame, and the tail end of the support arm is fixed with the injection needle.
6. The liquid sample introduction module according to claim 1, wherein: a plurality of sample hole sites are arranged on the disc surface of the sample disc at annular intervals and used for placing sample bottles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123295676.2U CN216646542U (en) | 2021-12-24 | 2021-12-24 | Liquid sample introduction module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123295676.2U CN216646542U (en) | 2021-12-24 | 2021-12-24 | Liquid sample introduction module |
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| Publication Number | Publication Date |
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| CN216646542U true CN216646542U (en) | 2022-05-31 |
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| CN202123295676.2U Active CN216646542U (en) | 2021-12-24 | 2021-12-24 | Liquid sample introduction module |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117630253A (en) * | 2023-11-21 | 2024-03-01 | 青岛普仁仪器有限公司 | Automatic sample injector |
-
2021
- 2021-12-24 CN CN202123295676.2U patent/CN216646542U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117630253A (en) * | 2023-11-21 | 2024-03-01 | 青岛普仁仪器有限公司 | Automatic sample injector |
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