Headspace sample injector capable of uniformly heating sample

Abstract

The utility model discloses a headspace sample injector capable of uniformly heating samples, which belongs to the technical field of headspace sample injectors and comprises a base, a protective box is mounted at the top of the base, a heating plate is connected to the inner wall of the protective box, and a heat conduction component is connected to the top of the protective box through a top plate. The fixed bottom plate is connected to the bottom of the base, a driving motor is installed on the surface of the fixed bottom plate, the output end of the driving motor is in transmission connection with a rotating plate, and a supporting frame plate is detachably installed on the top of the rotating plate through a limiting guide rail; an anti-skid assembly for locking and positioning the supporting frame plate is arranged on the surface of the supporting frame plate; in the using process, the sample container can be comprehensively heated, it is guaranteed that samples are heated in a balanced mode, the heating efficiency is further improved, the samples can be conveniently placed and taken out, and the detection efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of head space samplers, in particular to a head space sampler with uniform sample heating. Background Art

[0002] The headspace sampler is a convenient and fast sample pretreatment method in gas chromatography. The use of headspace sampling technology can avoid the lengthy and tedious sample pretreatment process, avoid the interference of organic solvents on the analysis, and reduce the contamination of the chromatographic column and the injection port. The principle is to place the sample to be tested in a closed container, heat and raise the temperature to make the volatile components evaporate from the sample matrix, reach equilibrium in the gas-liquid (or gas-solid) two phases, and directly extract the top gas for chromatographic analysis, so as to test the composition and content of the volatile components in the sample. However, the existing headspace sampler can only heat one side of the outer side of the sample container, so that it is heated unevenly, which will affect the heating efficiency and the use effect is poor.

[0003] As in the prior art, the Chinese utility model with publication number: CN219675929U discloses a headspace sampler with uniform sample heating, wherein a containing box is provided under the main body of the device, a rotating shaft is rotatably provided on the bottom surface of the main body of the device, a driving motor is provided at the lower end of the rotating shaft extending into the containing box, a first support rod is provided on the rotating shaft, second support rods are provided at both ends of the first support rod, an arc frame is provided between the two ends of the second main rod, a plurality of rotating rods are rotatably provided between the opposite sides of the arc frame, and a plurality of fan blades are provided on the outer side surface of the rotating rod along the circumferential direction; a plurality of heating tubes are provided in the main body of the device and along the circumferential direction, and the heating tubes are arranged at intervals; a bottom plate is provided on the rotating shaft and near the lower end, a positioning slide groove is provided on the bottom plate, a positioning slide block is slidably provided in the positioning slide groove, a support plate is provided on the positioning slide block, a plurality of slots are provided on the support plate, and draw-out doors are provided on both sides of the main body of the device and at positions corresponding to the positions of the support plates.

[0004] Through the above technology, it can be known that the existing head space sampler can only heat one side of the outer side of the sample container during use, resulting in uneven heating, which will affect the heating efficiency and poor use effect. Therefore, we need to propose a head space sampler with uniform sample heating. Utility Model Content

[0005] The purpose of the utility model is to provide a head space sampler with uniform sample heating, which can fully heat the sample container during use to ensure that the sample is heated evenly, further improve the heating efficiency, and conveniently place and remove the sample to improve the detection efficiency, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides: a head space sampler with uniform sample heating, comprising a base, a protective box body is installed on the top of the base, the inner wall of the protective box body is connected to a heating plate, and the top of the protective box body is connected to a heat-conducting component through a top plate; a fixed bottom plate connected to the bottom of the base, a driving motor is installed on the surface of the fixed bottom plate, the output end of the driving motor is transmission-connected to a rotating plate, a support frame plate is detachably installed on the top of the rotating plate through a limiting guide rail, and an anti-slip component for locking and positioning the support frame plate is provided on the surface of the support frame plate.

[0007] Preferably, the heat conduction component includes: a guide box connected to the bottom of the top plate, and a heating box connected to the inside of the guide box; wherein, air inlet grilles are provided on both sides of the guide box, and a guide fan is embedded in the heat conduction hole at the bottom of the guide box.

[0008] Preferably, a positioning cylinder is provided at the center position of the rotating plate, the output end of the driving motor is transmission-connected to the inside of the positioning cylinder, the bottom of the rotating plate is connected to a limiting ring, the top of the base is connected to a limiting seat, and the inner wall of the limiting ring is rotationally connected to the inner wall of the limiting seat.

[0009] Preferably, the limiting guide rails are symmetrically installed on the top of the rotating plate, auxiliary guide rails are connected to both sides of the limiting guide rails and located on the top of the rotating plate, and a limiting guide groove is provided at the bottom of the supporting frame plate.

[0010] Preferably, the inner wall of the limiting guide groove is slidably connected to the surface of the limiting guide rail, and the bottom of the supporting frame plate is symmetrically provided with guide grooves, and the inner wall of the guide groove is slidably connected to the surface of the auxiliary guide rail.

[0011] Preferably, the anti-slip assembly includes: a connecting block connected to the top of the supporting frame plate, and a locking rod threadedly mounted on the inner wall of the connecting block; wherein a baffle is connected to the bottom end of the locking rod, and a compression spring is sleeved on the surface of the locking rod.

[0012] Preferably, the bottom end of the compression spring is connected to the surface of the baffle, the bottom of the baffle is connected to a locking block, and the bottom of the locking block penetrates the supporting frame plate and contacts the surface of the limiting guide rail.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The utility model is provided with a base, a heating plate, a rotating plate, a limiting guide rail, a supporting frame plate, a heat-conducting component and an anti-slip component structure, and the supporting frame plate equipped with a sample container is slidably inserted into the surface of the limiting guide rail and the auxiliary guide rail through the limiting guide groove and the guide groove at the bottom, and the supporting frame plate is assembled, and the locking rod is rotated so that the locking block connected to the bottom end of the locking rod through the baffle plate penetrates the supporting frame plate and is pressed against the surface of the limiting guide rail to position the supporting frame plate to prevent sliding and falling off during the rotation process; the rotating plate is driven by a driving motor to rotate on the top of the limiting seat, so that the supporting frame plate equipped with the sample container can rotate inside the protective box body, and the heating box and the guide fan inside the guide box can be used to transport the heat heated by the heating box to the top of the supporting frame plate, and the heating plate can be used to further improve the effect of comprehensive heating of the sample container, ensure that the sample is heated evenly, and further improve the heating efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the internal structure of the protective box of the utility model;

[0017] Figure 3 This is a schematic diagram of the rotating plate structure of the utility model;

[0018] Figure 4 This is a schematic diagram of the support frame structure of the utility model;

[0019] Figure 5 This is a schematic diagram of the structure of the guide box of the utility model.

[0020] In the figure: 1. base; 2. protective box body; 3. top plate; 4. heating plate; 5. fixed bottom plate; 6. driving motor; 7. rotating plate; 8. positioning cylinder; 9. limiting ring; 10. limiting guide rail; 11. auxiliary guide rail; 12. supporting frame plate; 13. limiting guide groove; 14. guide groove; 15. pull handle; 16. connecting block; 17. locking rod; 18. baffle; 19. locking block; 20. compression spring; 21. guide box; 22. air intake grille; 23. guide fan; 24. heating box; 25. limiting seat. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1-5 The utility model provides: a head space sampler with uniform sample heating, comprising a base 1, a protective box 2 is installed on the top of the base 1, a heating plate 4 is connected to the inner wall of the protective box 2, and a heat-conducting component is connected to the top of the protective box 2 through a top plate 3; a fixed bottom plate 5 connected to the bottom of the base 1, a driving motor 6 is installed on the surface of the fixed bottom plate 5, and the output end of the driving motor 6 is transmission-connected to a rotating plate 7, a support frame plate 12 is detachably installed on the top of the rotating plate 7 through a limiting guide rail 10, and an anti-slip component for locking and positioning the support frame plate 12 is provided on the surface of the support frame plate 12.

[0023] It is worth mentioning that, through the arrangement of the base 1, the heating plate 4, the rotating plate 7, the limiting guide rail 10, the supporting frame plate 12, the heat-conducting component and the anti-slip component structure, the sample container can be fully heated during use to ensure that the sample is heated evenly, further improve the heating efficiency, and conveniently place and remove the sample, thereby improving the efficiency of detection.

[0024] Specifically, the heat conduction assembly includes: a flow guide box 21 connected to the bottom of the top plate 3, and a heating box 24 connected to the inside of the flow guide box 21; wherein, air intake grilles 22 are arranged on both sides of the flow guide box 21, and a flow guide fan 23 is embedded in the heat conduction hole at the bottom of the flow guide box 21. A positioning cylinder 8 is arranged at the center of the rotating plate 7, the output end of the driving motor 6 is transmission-connected to the inside of the positioning cylinder 8, the bottom of the rotating plate 7 is connected to a limiting ring 9, the top of the base 1 is connected to a limiting seat 25, and the inner wall of the limiting ring 9 is rotationally connected to the inner wall of the limiting seat 25.

[0025] Furthermore, the top plate 3 is a structure for installing the guide box 21, the heating box 24 is a structure for heating the inside of the guide box 21, an electric heating coil is arranged inside the heating box 24, the air inlet grille 22 protects the internal structure, the guide fan 23 guides and transports the heated air to the sample container, the positioning tube 8 is a structure for limiting the support frame plate 12, the limiting ring 9 is a limiting structure that cooperates with the limiting seat 25 to further position the position of the rotating plate 7.

[0026] The limiting guide rails 10 are symmetrically mounted on the top of the rotating plate 7, and auxiliary guide rails 11 are connected to the two sides of the limiting guide rails 10 and located at the top of the rotating plate 7, and a limiting guide groove 13 is provided at the bottom of the supporting frame plate 12. The inner wall of the limiting guide groove 13 is slidably connected to the surface of the limiting guide rail 10, and the bottom of the supporting frame plate 12 is symmetrically provided with guide grooves 14, and the inner wall of the guide groove 14 is slidably connected to the surface of the auxiliary guide rail 11.

[0027] In addition, the limiting guide rail 10 cooperates with the limiting guide groove 13 to limit the support frame plate 12, and the auxiliary guide rail 11 cooperates with the guide groove 14 to act as a guiding structure when assembling the limiting guide rail 10 of the support frame plate 12. The support frame plate 12 plays the role of assembling the sample container.

[0028] The anti-slip assembly includes: a connection block 16 connected to the top of the support frame plate 12, and a locking rod 17 threadedly mounted on the inner wall of the connection block 16; wherein, a baffle plate 18 is connected to the bottom end of the locking rod 17, and a compression spring 20 is sleeved on the surface of the locking rod 17. The bottom end of the compression spring 20 is connected to the surface of the baffle plate 18, and a locking block 19 is connected to the bottom of the baffle plate 18, and the bottom of the locking block 19 penetrates the support frame plate 12 and contacts the surface of the limiting guide rail 10.

[0029] The connecting block 16 is a structure that positions the locking rod 17 to ensure the stable installation of the locking rod 17. The baffle 18 is a structure that connects the locking block 19. The compression spring 20 acts on the baffle 18. The action of the compression spring 20 on the baffle 18 improves the locking and positioning effect of the locking block 19 and prevents the locking block 19 from loosening. A pull handle 15 is connected to one side of the support frame plate 12.

[0030] The support frame plate 12 equipped with the sample container is slidably inserted into the surface of the limiting guide rail 10 and the auxiliary guide rail 11 through the limiting guide groove 13 and the guide groove 14 at the bottom, and the support frame plate 12 is assembled, and the locking rod 17 is rotated so that the locking block 19 connected to the bottom end of the locking rod 17 through the baffle 18 passes through the support frame plate 12 and is pressed against the surface of the limiting guide rail 10, so as to position the support frame plate 12 to prevent sliding and falling off during rotation; the driving motor 6 drives the rotating plate 7 to rotate on the top of the limiting seat 25, so that the support frame plate 12 equipped with the sample container can rotate inside the protective box 2, and cooperate with the heating box 24 and the guide fan 23 inside the guide box 21, so that the heat heated by the heating box 24 can be transported to the top of the support frame plate 12, and cooperate with the heating plate 4 to further improve the effect of comprehensive heating of the sample container, ensure that the sample is heated evenly, and further improve the heating efficiency.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A head space sampler with uniform sample heating, characterized in that: include: A base (1), a protective box (2) is installed on the top of the base (1), a heating plate (4) is connected to the inner wall of the protective box (2), and a heat-conducting component is connected to the top of the protective box (2) via a top plate (3); A fixed bottom plate (5) is connected to the bottom of the base (1), a driving motor (6) is installed on the surface of the fixed bottom plate (5), the output end of the driving motor (6) is drivingly connected to a rotating plate (7), a supporting frame plate (12) is detachably installed on the top of the rotating plate (7) via a limiting guide rail (10), and an anti-slip component for locking and positioning the supporting frame plate (12) is provided on the surface of the supporting frame plate (12).

2. A head space sampler with uniform sample heating according to claim 1, characterized in that: The heat conducting component comprises: a flow guide box (21) connected to the bottom of the top plate (3), and A heating box (24) connected to the interior of the flow guide box (21); Wherein, air inlet grilles (22) are arranged on both sides of the flow guide box (21), and a flow guide fan (23) is embedded inside the heat conduction hole at the bottom of the flow guide box (21).

3. A head space sampler with uniform sample heating according to claim 1, characterized in that: A positioning cylinder (8) is arranged at the center of the rotating plate (7); the output end of the driving motor (6) is transmission-connected to the interior of the positioning cylinder (8); the bottom of the rotating plate (7) is connected to a limiting ring (9); the top of the base (1) is connected to a limiting seat (25); and the inner wall of the limiting ring (9) is rotationally connected to the inner wall of the limiting seat (25).

4. A head space sampler with uniform sample heating according to claim 1, characterized in that: The limiting guide rails (10) are symmetrically mounted on the top of the rotating plate (7); auxiliary guide rails (11) are connected to both sides of the limiting guide rails (10) and located on the top of the rotating plate (7); and a limiting guide groove (13) is provided at the bottom of the supporting frame plate (12).

5. A head space sampler with uniform sample heating according to claim 4, characterized in that: The inner wall of the limiting guide groove (13) is slidably connected to the surface of the limiting guide rail (10), and the bottom of the supporting frame plate (12) is symmetrically provided with guide grooves (14), and the inner wall of the guide groove (14) is slidably connected to the surface of the auxiliary guide rail (11).

6. A head space sampler with uniform sample heating according to claim 1, characterized in that: The anti-slip assembly comprises: a connecting block (16) connected to the top of the supporting frame plate (12), and A locking rod (17) threadedly mounted on the inner wall of the connecting block (16); The bottom end of the locking rod (17) is connected to a baffle (18), and the surface of the locking rod (17) is sleeved with a compression spring (20).

7. A head space sampler with uniform sample heating according to claim 6, characterized in that: The bottom end of the compression spring (20) is connected to the surface of the baffle (18), the bottom of the baffle (18) is connected to a locking block (19), and the bottom of the locking block (19) penetrates the supporting frame plate (12) and contacts the surface of the limiting guide rail (10).

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