Sample injection needle mounting bracket of automatic sample injector

Abstract

The utility model relates to the technical field of automatic sample injectors, in particular to a sample injection needle mounting bracket of an automatic sample injector, which comprises a back plate, two limiting pieces are arranged on the front surface of the back plate, two front plates are fixedly connected to the front surface of the back plate, a limiting block is slidably connected to the front surface of each front plate, and the limiting pieces are fixedly connected to the front surface of the back plate. A rack is fixedly connected to the back face of each limiting block, and a gear is rotationally connected to the front face of the back plate. By arranging the limiting blocks, the racks and other components, the gear can rotate and slide through the two racks through the mutual matching relation between the limiting blocks and the racks; according to the sample injection needle clamping device, by arranging the limiting blocks, the racks and other parts, the effect of clamping and fixing a needle cylinder of a sample injection needle is achieved, and the defects that according to an existing technical scheme, a clamping mechanism for the needle cylinder of the sample injection needle cannot be adjusted, and the mounting and fixing effect is affected are overcome.

Description

Technical Field

[0001] This application relates to the technical field of automatic samplers, and particularly to a sampling needle mounting bracket for an automatic sampler. Background Art

[0002] In chromatographic experiment analysis, an injector that can quantitatively send samples into a chromatographic column is called a sampler. Samplers are divided into two types: manual samplers and automatic samplers. An automatic sampler is an intelligent and automated sampling instrument. By simply setting the sampling parameters and placing the samples to be detected, the automatic sampling process can be completed. This instrument is an intelligent and automated gas chromatograph sampling device, which can greatly improve the sampling efficiency and accuracy compared with manual sampling.

[0003] Generally speaking, an automatic sampler is composed of a sampling arm, a sampling needle, a sample tray, a cleaning system, a drive system, a control system and other parts. The normal operation of an automatic sampler depends on the close cooperation and joint drive among various parts.

[0004] Through retrieval, Chinese Patent Publication No. CN219915518U discloses a sampling needle mounting bracket for an automatic sampler, which includes a needle tube mounting rack, a connecting rack, a push rod mounting rack and a driving cylinder. The connecting rack is arranged on the needle tube mounting rack, the driving cylinder is arranged on the connecting rack, the push rod mounting rack is fixedly connected with the piston rod of the driving cylinder, and the push rod mounting rack includes a main mounting table, a pair of opening and closing clamping blocks and an opening and closing control mechanism.

[0005] In view of the above related technologies, the inventor found the following defects: The clamping mechanism for the sampling needle barrel cannot be adjusted, which affects the installation and fixing effects. Summary of the Utility Model

[0006] In order to improve the installation effect of the sampling needle, this application provides a sampling needle mounting bracket for an automatic sampler.

[0007] A sampling needle mounting bracket for an automatic sampler provided by this application adopts the following technical solution: A sampling needle mounting bracket for an automatic sampler includes a back plate, two limiting members are arranged on the front surface of the back plate, two front plates are fixedly connected to the front surface of the back plate, a chute is opened on the front surface of each front plate, a limiting block is slidably connected to the front surface of each front plate, a rack is fixedly connected to the back surface of each limiting block, a gear is rotatably connected to the front surface of the back plate, a first threaded rod is fixedly connected to the outer surface of the gear, an adjusting wheel is fixedly connected to the other end of the first threaded rod, and a locking wheel is threadedly connected to the outer surface of the first threaded rod.

[0008] Optionally, a baffle is fixedly connected to the back plate, a clamping groove is formed on the outer surface of the baffle, and a positioning member is fixedly connected to the lower surface of the back plate.

[0009] Optionally, two support bars are fixedly connected to the outer surface of the baffle, a top plate is arranged at the top of the support bars, and a cylinder is fixedly installed on the lower surface of the top plate.

[0010] Optionally, a pressing plate is arranged between the two support bars, two fixing clips are rotatably connected to the lower surface of the pressing plate, and a fixing groove is formed on the outer surface of each fixing clip.

[0011] Optionally, a pushing member is arranged on the lower surface of the pressing plate, and two driving bars are rotatably connected to the pushing member.

[0012] Optionally, a support block is fixedly connected to the lower surface of the pressing plate, two limiting rods are slidably connected inside the support block, and four limiting columns are fixedly connected to the upper surface of the pressing plate.

[0013] Optionally, a runner is arranged on one side of the pressing plate, and a second threaded rod is threadedly connected inside the runner.

[0014] In summary, the present application includes the following beneficial technical effects:

[0015] 1. By providing components such as a limiting block and a rack, through the mutual cooperation relationship between the limiting block and the rack, the gear can rotate and slide through two racks, so that the two racks drive the two limiting blocks to slide towards each other, thereby achieving the effect of clamping and fixing the syringe barrel of the sampling needle by providing components such as a limiting block and a rack in the present application, and solving the deficiency that the clamping mechanism for the syringe barrel of the sampling needle in the existing technical solution cannot be adjusted, affecting the installation and fixing effects.

[0016] 2. By providing components such as a pushing member and a driving bar, through the mutual cooperation relationship between the pushing member and the driving bar, the runner can drive the pushing member to slide through the second threaded rod, so that the pushing member can drive the two fixing clips to open and close and rotate through the driving bar, and achieving the effect of clamping and fixing the top of the push rod of the syringe barrel by providing the pushing member and the driving bar in the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic front view of the overall structure in an embodiment of the present application;

[0018] Figure 2 is a schematic back view of the overall structure in an embodiment of the present application;

[0019] Figure 3 is an exploded view of the limiting block in an embodiment of the present application;

[0020] Figure 4 It is a schematic structural diagram of the backplane in the embodiment of the present application;

[0021] Figure 5 It is a schematic structural diagram of the pressing plate in the embodiment of the present application;

[0022] Figure 6 It is a schematic structural diagram of the fixed clamp in the embodiment of the present application.

[0023] Reference numerals: 1, backplane; 2, limiting member; 3, front plate; 4, sliding groove; 5, limiting block; 6, rack; 7, gear; 8, first threaded rod; 9, adjusting wheel; 10, locking wheel; 11, baffle; 12, clamping groove; 13, positioning member; 14, support bar; 15, top plate; 16, cylinder; 17, pressing plate; 18, fixed clamp; 19, fixed groove; 20, pushing member; 21, driving bar; 22, support block; 23, limiting rod; 24, limiting column; 25, runner; 26, second threaded rod. Detailed implementation manners

[0024] The following further describes the present application in detail with reference to the attached Figure 1-6 drawings.

[0025] The embodiment of the present application discloses a sample injection needle mounting bracket for an automatic sampler. As shown in Figure 1 、 2 、3, 4, 5, a sample injection needle mounting bracket for an automatic sampler includes a backplane 1. A baffle 11 is fixedly connected to the backplane 1. Two support bars 14 are fixedly connected to the outer surface of the baffle 11. A pressing plate 17 is arranged between the two support bars 14. A top plate 15 is arranged on the top of the support bar 14. A cylinder 16 is fixedly installed on the lower surface of the top plate 15. The upper surface of the pressing plate 17 is fixedly connected to the piston rod of the cylinder 16. Two front plates 3 are fixedly connected to the front of the backplane 1. Two limiting members 2 are arranged on the front of the backplane 1. One end of each limiting member 2 corresponding to the front plate 3 is fixedly connected. A sliding groove 4 is formed in the front of each front plate 3. A limiting block 5 is slidably connected to the front of each front plate 3. A groove is formed in the outer surface of each limiting block 5. Each limiting block 5 is slidably connected to the front of the front plate 3 through the sliding groove 4. A rack 6 is fixedly connected to the back of each limiting block 5. A gear 7 is rotatably connected to the front of the backplane 1. The two racks 6 are meshed with the gear 7. A first threaded rod 8 is fixedly connected to the outer surface of the gear 7. The first threaded rod 8 is rotatably connected to the inside of the backplane 1. The first threaded rod 8 drives the gear 7 to rotate. The gear 7 drives the limiting block 5 to slide through the rack 6, so as to clamp and fix the syringe barrel of the sample injection needle.

[0026] Please refer to Figure 3 、 4, the other end of the first threaded rod 8 is fixedly connected with an adjusting wheel 9. The outer surface of the first threaded rod 8 is threadedly connected with a locking wheel 10. By rotating the locking wheel 10, the outer surface of the locking wheel 10 is in communication with the back surface of the back plate 1, thereby fixing the first threaded rod 8 and preventing the first threaded rod 8 from reversing.

[0027] Please refer to Figure 3 , a clamping groove 12 is formed on the outer surface of the baffle 11. There is a groove on one side of the baffle 11 where the clamping groove 12 is formed. The clamping groove 12 is used to fix the flange of the syringe. A positioning member 13 is fixedly connected to the lower surface of the back plate 1. A placement groove and a needle hole are formed on the outer surface of the positioning member 13, and the placement groove is in communication with the needle hole.

[0028] Please refer to Figure 1 , 5 , referring to FIGS. 5, 6, two fixing clips 18 are rotatably connected to the lower surface of the pressing plate 17. A fixing groove 19 is formed on the outer surface of each fixing clip 18. The fixing groove 19 is used to clamp the top end of the piston rod of the sampling needle. The fixing clip 18 can be rotated to open and close the fixing groove 19.

[0029] Please refer to Figure 1 , 5 , referring to FIGS. 5, 6, a pushing member 20 is arranged on the lower surface of the pressing plate 17. The pushing member 20 is slidably connected to the lower surface of the pressing plate 17. Two driving bars 21 are rotatably connected to the pushing member 20. The pushing member 20 drives the fixing clip 18 to rotate through the driving bars 21.

[0030] Please refer to Figure 1 , 2 , referring to FIGS. 4, 5, a support block 22 is fixedly connected to the lower surface of the pressing plate 17. Two limiting rods 23 are slidably connected inside the support block 22. One end of each limiting rod 23 is fixedly connected to the outer surface of the pushing member 20. Four limiting columns 24 are fixedly connected to the upper surface of the pressing plate 17. Each limiting column 24 is slidably connected inside the top plate 15.

[0031] Please refer to Figure 5 , 6 , a rotating wheel 25 is arranged on one side of the pressing plate 17. The rotating wheel 25 is rotatably connected to the outer surface of the support block 22. A second threaded rod 26 is threadedly connected inside the rotating wheel 25. The second threaded rod 26 is slidably connected inside the support block 22. One end of the second threaded rod 26 is fixedly connected to the outer surface of the pushing member 20.

[0032] The implementation principle of the sampling needle mounting bracket of an automatic sampler in an embodiment of the present application is as follows: Rotate the runner 25. The runner 25 drives the pushing member 20 to slide through the second threaded rod 26. The pushing member 20 drives the fixed clamp 18 to rotate and open through the driving bar 21. Pass the tip of the sampling needle through the needle hole of the positioning member 13 for installation, so that the flange of the syringe barrel enters the inside of the card slot 12, and the top of the piston push rod of the syringe barrel enters the inside of the fixed slot 19. Reverse the runner 25 to complete the fixation of the top of the piston push rod. Rotate the adjusting wheel 9. The adjusting wheel 9 drives the first threaded rod 8 to rotate. The first threaded rod 8 drives the gear 7 to rotate. The gear 7 drives the two racks 6 to slide. The two racks 6 drive the corresponding limit blocks 5 to slide, so that the outer surface of the syringe barrel fits with the groove on the outer surface of the limit block 5. Rotate the locking wheel 10 so that the outer surface of the locking wheel 10 is closely attached to the back surface of the back plate 1 to realize the clamping of the syringe barrel. Start the cylinder 16. The piston rod of the cylinder 16 drives the pressing plate 17 to move up and down. The pressing plate 17 drives the piston push rod of the syringe barrel to move up and down through the fixed clamp 18 to realize sampling or sample injection.

[0033] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. An injection needle mounting bracket for an automatic sampler, comprising a back plate (1), characterized in that: Two limiting members (2) are arranged on the front of the back plate (1); two front plates (3) are fixedly connected to the front of the back plate (1); a sliding groove (4) is provided on the front of each front plate (3); a limiting block (5) is slidably connected to the front of each front plate (3); a rack (6) is fixedly connected to the back of each limiting block (5); a gear (7) is rotatably connected to the front of the back plate (1); a first threaded rod (8) is fixedly connected to the outer surface of the gear (7); an adjusting wheel (9) is fixedly connected to the other end of the first threaded rod (8); and a locking wheel (10) is threadedly connected to the outer surface of the first threaded rod (8).

2. The injection needle mounting bracket of an automatic sampler according to claim 1, characterized in that: The back plate (1) is fixedly connected to a baffle (11), an outer surface of the baffle (11) is provided with a slot (12), and a positioning piece (13) is fixedly connected to the lower surface of the back plate (1).

3. The injection needle mounting bracket of an automatic sampler according to claim 2, characterized in that: Two support bars (14) are fixedly connected to the outer surface of the baffle (11), a top plate (15) is provided on the top of the support bar (14), and a cylinder (16) is fixedly mounted on the lower surface of the top plate (15).

4. The injection needle mounting bracket of an automatic sampler according to claim 3, characterized in that: A pressing plate (17) is provided between the two supporting bars (14); the lower surface of the pressing plate (17) is rotatably connected to two fixing clips (18); and a fixing groove (19) is provided on the outer surface of each fixing clip (18).

5. The injection needle mounting bracket of an automatic sampler according to claim 4, characterized in that: A pushing member (20) is provided on the lower surface of the pressing plate (17), and the pushing member (20) is rotatably connected to two driving bars (21).

6. The injection needle mounting bracket of an automatic sampler according to claim 4, characterized in that: The lower surface of the pressing plate (17) is fixedly connected to a support block (22), the interior of the support block (22) is slidably connected to two limit rods (23), and the upper surface of the pressing plate (17) is fixedly connected to four limit columns (24).

7. The injection needle mounting bracket of an automatic sampler according to claim 4, characterized in that: A rotating wheel (25) is provided on one side of the pressing plate (17), and a second threaded rod (26) is connected to the inner thread of the rotating wheel (25).

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