Automatic sample injection mechanism of liquid chromatograph

Abstract

The utility model discloses an automatic sample introduction mechanism of a liquid chromatograph, and particularly relates to the technical field of sample introduction of chromatographic instruments, the automatic sample introduction mechanism comprises a sample introduction disc, a limiting ring and a sliding frame, the limiting ring is fixed at the top end of the sample introduction disc, the sliding frame is fixed on the upper surface of the limiting ring, and an adjusting and locking mechanism is mounted in the sliding frame; the adjusting and locking mechanism comprises a screw fixedly installed in the sliding frame, and the outer wall of the screw is in threaded connection with two sleeving blocks. By adopting the adjusting and locking mechanism, a sample required by the liquid chromatograph is placed in a gap between the two clamping plates, the driving motor drives the screw rod to rotate, the screw rod rotates in the sliding frame, the two linkage blocks respectively carry the two clamping plates to be close to each other, and the transmission motor drives the connecting screw rod to rotate in the supporting frame; and front-back and right-side limiting locking operation can be performed on a sample required by the liquid chromatograph, locking sample injection operation can be realized according to different samples, and the application range of sample injection is wider.

Description

TECHNICAL FIELD

[0001] The utility model relates to chromatograph sampling technology field more specifically, the utility model relates to a kind of automatic sampling mechanism of liquid chromatograph. BACKGROUND

[0002] Automatic sampling mechanism in liquid chromatograph has important use, automatic sampler can be according to preset sampling mode and order, automatically the sample to be measured is sent into liquid chromatograph and is analyzed, reduce the time and labor cost of manual operation.

[0003] Through searching in the existing published technical literature, the patent of China patent publication number CN215179955U discloses a kind of automatic sampling device of liquid chromatograph for imidazole ethanol production, the sampling device is then fixed by being pressed at bottle plug when sampling needle enters sample bottle, can prevent bottle body to sway to cause sampling needle to enter difficult problem affecting normal sampling, simultaneously, using transparent protective cover covers sampling needle inside, can avoid dust impurity in air adhere to needle body surface, to avoid the needle body adhered with impurity to enter sample bottle caused sample pollution problem, meet actual use demand, and automatic sampling operation speeds up sampling efficiency.But the sampling device has the following defects;

[0004] Sampling device when carrying out liquid chromatograph automatic sampling use, although sample can be realized sampling operation, but in sampling process, since sample size is different, therefore, it is difficult to realize locking sampling according to different sample, sampling use applicability is poor, it is necessary to provide a kind of liquid chromatograph automatic sampling mechanism. UTILITY MODEL CONTENT

[0005] In order to overcome the above-mentioned defects of the prior art, the utility model provides a kind of liquid chromatograph automatic sampling mechanism.

[0006] In order to achieve the above-mentioned purpose, the utility model provides the following technical scheme: a kind of liquid chromatograph automatic sampling mechanism, including sampling disc, limit ring and sliding frame, the limit ring is fixed at the top end of sampling disc, the sliding frame is fixed on the upper surface of limit ring, the inside of sliding frame is equipped with adjusting locking mechanism;The adjusting locking mechanism includes screw rod fixedly installed in the inside of sliding frame, and the outer wall of screw rod is connected with two sleeve blocks, one side of sliding frame is fixedly installed with driving motor, and the driving motor is used to drive screw rod rotation;

[0007] The upper surface of each sleeve block is fixedly connected with a linkage block, and the bottom end of the linkage block is welded with a clamping plate. A supporting frame is fixedly installed on one side of one of the clamping plates, and a connecting screw rod is rotatably connected to the inner wall of the supporting frame.

[0008] Preferably, the two sleeve blocks are slidingly connected with the sliding frame, the outer wall of the screw rod is oppositely and symmetrically provided with threads, and the output end of the drive motor is coaxially connected with the screw rod. The two clamping plates are slidingly connected with the upper surface of the limiting ring, and the two clamping plates are symmetrically arranged about the center point of the limiting ring.

[0009] In the technology, the sample required by the liquid chromatograph is placed in the gap between the two clamping plates. The drive motor drives the screw rod to rotate, and the screw rod rotates inside the sliding frame. At the same time, the two sleeve blocks carried by the screw rod move closer to each other under the action of the thread transmission force. The two linkage blocks respectively carry the two clamping plates to move closer to each other. The two clamping plates are clamped in front of and behind the sample required by the liquid chromatograph. The transmission motor drives the connecting screw rod to rotate inside the supporting frame. The connecting sleeve block drives the extrusion support plate to move left. The extrusion support plate extrudes the right side of the sample required by the liquid chromatograph to the left. Thus, the front and rear and right side limiting and locking operations of the sample required by the liquid chromatograph can be realized.

[0010] Preferably, the bottom end of the sample disc is fixedly installed with a rotating rod, and the bottom end of the rotating rod is installed with a transmission collection mechanism. The transmission collection mechanism includes a rotating motor fixedly installed at the bottom end of the rotating rod, and the rotating motor is used to drive the rotating rod to rotate. The bottom end of the rotating motor is fixedly connected with a support plate. The outer wall of the rotating rod is welded with a support shaft, and one end of the support shaft is fixedly connected with a support disc. The inner wall of the support disc is slidingly connected with a collection disc. The inner wall of the sample disc is fixedly connected with a collection tube, and the bottom end of the collection tube is fixedly connected with a flow guide tube. The inner wall of the support disc and the outer wall of the collection disc are smooth surfaces, and the support disc and the collection disc are made of stainless steel. The center point of the collection tube and the center point of the inner wall of the collection disc are on the same vertical line, and the inner walls of the collection tube and the collection disc are smooth surfaces. The collection tube is connected with the sample disc, and the collection tube is connected with the flow guide tube.

[0011] In the technology, the rotating motor can drive the rotating rod to rotate the sample disc. The sample flows along the inner wall of the limiting ring into the collection tube, and then into the flow guide tube. The sample collection operation is realized through the collection disc. In this way, the sample outflow is avoided to prevent pollution. By moving the collection disc upward, the collection disc moves upward along the inner wall of the support disc to increase the stability of the support disc.

[0012] The utility model discloses a technical effect and advantage are:

[0013] The utility model discloses adopt adjusting locking mechanism, place the sample required by liquid chromatograph in the gap between two clamping plates, drive motor driving screw rotation is started, and the screw rotates in the sliding frame, and the two sleeveing blocks are approached each other under the action of screw transmission force that the screw carries, and two linkage blocks respectively carry two clamping plates and approach each other, and then start transmission motor, and transmission motor drive connection screw rotates in the support frame, and the extrusion board is extruded on the right side of the sample required by liquid chromatograph to the left, can realize front and back and right side limit locking operation to the sample required by liquid chromatograph, can realize locking sampling operation according to different samples, and the sampling use applicability is wider.

[0014] 2, the utility model discloses adopt transmission collection mechanism, and rotary motor can drive the rotation of the rotating lever and make sampling disc rotate, and sampling disc rotates, and once the test tube of sampling leaks in the sampling process, thereby causing sample leakage, and the sample follows the flow guide into the collection pipe in the inner wall of the limit ring, and is discharged to the collection disc through the flow guide pipe, and realizes sample collection operation through the collection disc, and the collection disc is removed along the upper inner wall of the support disc, avoids the pollution caused by sample leakage, can realize collection operation to the sample of leakage, avoids the surface pollution of sampling disc. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 It is the whole structure schematic diagram of the automatic sampling mechanism of liquid chromatograph of the utility model.

[0016] Fig. 2 It is the local structure schematic diagram of limit ring and sliding frame junction of the utility model.

[0017] Fig. 3 It is the local structure schematic diagram of clamping plate and support frame junction of the utility model.

[0018] Fig. 4 It is the vertical section overhead structure schematic diagram of the automatic sampling mechanism of liquid chromatograph of the utility model.

[0019] Fig. 5 It is the vertical section main view structure schematic diagram of the automatic sampling mechanism of liquid chromatograph of the utility model.

[0020] Fig. 6 It is the local structure schematic diagram of the automatic sampling mechanism of liquid chromatograph of the utility model.

[0021] The figure marks are: 1, sample disc; 2, limiting ring; 3, sliding frame; 4, screw rod; 5, sleeve block; 6, driving motor; 7, linkage block; 8, clamping plate; 9, support frame; 10, connecting screw rod; 11, transmission motor; 12, connecting sleeve block; 13, extrusion support plate; 14, rotating rod; 15, rotating motor; 16, support plate; 17, support shaft; 18, support disc; 19, collection disc; 20, collection pipe; 21, flow guide pipe. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0023] As shown in the accompanying drawings, Figs. 1-6 A kind of automatic sample injection mechanism of liquid chromatograph, the automatic sample injection mechanism of liquid chromatograph is provided with adjusting locking mechanism, the setting of adjusting locking mechanism can be realized front and right side limiting locking operation to the sample required by liquid chromatograph, can be realized locking sample injection operation according to different sample, sample injection is more widely applicable, the specific structure of adjusting locking mechanism is as follows.

[0024] In the technical solutions, as shown in the accompanying drawings, Figs. 1-3 Limiting ring 2 is fixed at the top end of sample disc 1, sliding frame 3 is fixed on the upper surface of limiting ring 2, and adjusting locking mechanism is installed in the inside of sliding frame 3;Adjusting locking mechanism includes screw rod 4 fixedly installed in the inside of sliding frame 3, and the outer wall of screw rod 4 is threadedly connected with two sleeve blocks 5, one side of sliding frame 3 is fixedly installed with driving motor 6, and driving motor 6 is used to drive screw rod 4 to rotate;The upper surface of each sleeve block 5 is fixedly connected with linkage block 7, and the bottom end of linkage block 7 is welded with clamping plate 8, and one side of one of clamping plate 8 is fixedly installed with support frame 9, and the inner wall of support frame 9 is rotatably connected with connecting screw rod 10;One side of support frame 9 is fixedly installed with transmission motor 11, and transmission motor 11 is used to drive connecting screw rod 10 to rotate, the outer wall of connecting screw rod 10 is threadedly connected with connecting sleeve block 12, and one side of connecting sleeve block 12 is fixedly installed with extrusion support plate 13.Two sleeve blocks 5 are slidably connected between sliding frame 3, and the outer wall of screw rod 4 is oppositely and symmetrically provided with threads;The output end of driving motor 6 is coaxially connected with screw rod 4, two clamping plates 8 are slidably connected with the upper surface of limiting ring 2, and two clamping plates 8 are symmetrically arranged about the center point of limiting ring 2.

[0025] The automatic sample injection mechanism of the liquid chromatograph in the technical solution is used, the sample required by the liquid chromatograph is placed in the gap between the two clamping plates 8, and the sample required by the liquid chromatograph is located inside the limiting ring 2. By starting the driving motor 6, the driving motor 6 drives the screw rod 4 to rotate, the screw rod 4 rotates in the sliding frame 3, and the two sleeve blocks 5 carried by the screw rod 4 are close to each other under the action of the threaded transmission force. The two sleeve blocks 5 carry the two linkage blocks 7, respectively, and the two linkage blocks 7 are close to each other, and the two linkage blocks 7 carry the two clamping plates 8, respectively, and the two clamping plates 8 are close to each other. The two clamping plates 8 are clamped in front of and behind the sample required by the liquid chromatograph. Then start the transmission motor 11, the transmission motor 11 drives the connecting screw rod 10 to rotate in the support frame 9, the connecting screw rod 10 carries the connecting sleeve block 12 to move left under the action of the threaded transmission force, and the connecting sleeve block 12 drives the extrusion support plate 13 to move left. The extrusion support plate 13 extrudes the right side of the sample required by the liquid chromatograph to the left, so that the front and rear and right side limiting and locking operations of the sample required by the liquid chromatograph can be realized. Then support the rotating motor 15 through the support plate 16, the rotating motor 15 drives the rotating rod 14 to rotate, the rotating rod 14 carries the sample injection disc 1 to rotate, and the sample injection disc 1 drives the limiting ring 2 to rotate. The sample required by the liquid chromatograph above the limiting ring 2 can be rotated to the detection position of the liquid chromatograph for sample injection operation.

[0026] In the technical solution, as shown in the accompanying drawings, Figs. 4-6 The bottom end of the sample injection disc 1 is fixedly installed with the rotating rod 14, and the bottom end of the rotating rod 14 is installed with the transmission collection mechanism; the transmission collection mechanism comprises a rotating motor 15 fixedly installed at the bottom end of the rotating rod 14, and the rotating motor 15 is used to drive the rotating rod 14 to rotate, and the bottom end of the rotating motor 15 is fixedly connected with a support plate 16;

[0027] A support shaft 17 is welded on one side of the outer wall of the rotating rod 14, one end of the support shaft 17 is fixedly connected with a support disc 18, a collection disc 19 is slidably connected with the inner wall of the support disc 18, a collection pipe 20 is fixedly connected with the inner wall of the sample injection disc 1, and a flow guide pipe 21 is fixedly connected with the bottom end of the collection pipe 20. The inner wall of the support disc 18 and the outer wall of the collection disc 19 are smooth surfaces, and the support disc 18 and the collection disc 19 are made of stainless steel. The center point of the collection pipe 20 and the center point of the inner wall of the collection disc 19 are on the same vertical line, and the inner walls of the collection pipe 20 and the collection disc 19 are smooth surfaces. The collection pipe 20 is connected with the sample injection disc 1, and the collection pipe 20 is connected with the flow guide pipe 21.

[0028] In use, the support plate 16 can provide support force for the rotary motor 15, the rotary motor 15 can drive the rotating rod 14 to rotate the sample feeding disc 1, so that different positions can be switched to realize sample feeding operation. In the sample feeding process, if the sample tube leaks, the sample can flow into the collection tube 20 along the inner wall of the limiting ring 2, enter the flow guide pipe 21 through the collection tube 20, and be discharged to the collection disc 19 through the flow guide pipe 21. The sample collection operation is realized through the collection disc 19. In this way, sample outflow and pollution caused by sample outflow are avoided. Secondly, after the sample enters the collection disc 19, the collection disc 19 is moved upward along the inner wall of the support disc 18 and is taken out, and the support shaft 17 can provide support force for the support disc 18 to increase the stability of the support disc 18.

[0029] The contents not described in detail in the specification all belong to the prior art known to those skilled in the art, and the model parameters of various electric appliances are not specifically limited, and conventional equipment can be used. In the technical solution, the electric appliance control elements not mentioned belong to the prior art, so they are not shown in the drawings and will not be described here.

[0030] The above is only a preferred embodiment of the present application and is not used to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A liquid chromatograph automatic sampling mechanism, comprising a sampling disc (1), a limiting ring (2) and a sliding frame (3), characterized in that: The limiting ring (2) is fixed at the top end of the sample tray (1), the sliding frame (3) is fixed on the upper surface of the limiting ring (2), and the inside of the sliding frame (3) is provided with an adjusting and locking mechanism; The adjusting and locking mechanism comprises a screw rod (4) fixedly installed in the inside of the sliding frame (3), two sleeve blocks (5) are threadedly connected to the outer wall of the screw rod (4), one side of the sliding frame (3) is fixedly provided with a driving motor (6), and the driving motor (6) is used to drive the screw rod (4) to rotate; The upper surface of each sleeve block (5) is fixedly connected with a linkage block (7), the bottom end of the linkage block (7) is welded with a clamping plate (8), one side of one of the clamping plates (8) is fixedly provided with a supporting frame (9), and the inner wall of the supporting frame (9) is rotatably connected with a connecting screw rod (10); One side of the supporting frame (9) is fixedly provided with a transmission motor (11), the transmission motor (11) is used to drive the connecting screw rod (10) to rotate, the outer wall of the connecting screw rod (10) is threadedly connected with a connecting sleeve block (12), and one side of the connecting sleeve block (12) is fixedly provided with an extrusion supporting plate (13).

2. The automatic sampling mechanism of a liquid chromatograph according to claim 1, characterized in that: The two sleeve blocks (5) are slidably connected with the sliding frame (3), and the outer wall of the screw rod (4) is provided with two opposite and symmetrical threads; The output end of the driving motor (6) is coaxially connected with the screw rod (4).

3. The automatic sampling mechanism of a liquid chromatograph according to claim 1, characterized in that: The two clamping plates (8) are slidably connected with the upper surface of the limiting ring (2), and the two clamping plates (8) are symmetrically arranged about the center point of the limiting ring (2).

4. The automatic sampling mechanism of a liquid chromatograph according to claim 1, characterized in that: The bottom end of the sample tray (1) is fixedly provided with a rotating rod (14), and a transmission and collection mechanism is installed at the bottom end of the rotating rod (14); the transmission and collection mechanism comprises a rotating motor (15) fixedly installed at the bottom end of the rotating rod (14), the rotating motor (15) is used to drive the rotating rod (14) to rotate, and the bottom end of the rotating motor (15) is fixedly connected with a supporting plate (16); One side of the outer wall of the rotating rod (14) is welded with a supporting shaft (17), one end of the supporting shaft (17) is fixedly connected with a supporting disc (18), the inner wall of the supporting disc (18) is slidably connected with a collection disc (19), the inner wall of the sample tray (1) is fixedly connected with a collection pipe (20), and the bottom end of the collection pipe (20) is fixedly connected with a flow guide pipe (21).

5. The liquid chromatograph automatic sampling mechanism of claim 4 wherein: The inner wall of the supporting disc (18) and the outer wall of the collection disc (19) are smooth surfaces, and the supporting disc (18) and the collection disc (19) are made of stainless steel.

6. The automatic sampling mechanism of a liquid chromatograph according to claim 4, characterized in that: The center point of the collection pipe (20) and the center point of the inner wall of the collection disc (19) are on the same vertical line, and the inner walls of the collection pipe (20) and the collection disc (19) are smooth surfaces.

7. The automatic sampling mechanism of claim 4, wherein: The collection pipe (20) is connected with the sample tray (1), and the collection pipe (20) is connected with the flow guide pipe (21).

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