Headspace sample injector

Abstract

The utility model belongs to the technical field of detection equipment, and particularly relates to a headspace sample injector which comprises a box body, a groove is formed in the box body, a sample placing disc is rotationally arranged in the groove, and a plurality of sample placing grooves are formed in the circumferential direction based on the circle center of the sample placing disc; the supporting frame is arranged in the box body, a first motor is fixedly arranged on the supporting frame, and an output shaft of the first motor is connected with the sample placing disc; the heating structure is arranged below the sample placing disc and comprises a supporting plate, the supporting plate is arranged on the side wall of the supporting frame, a shell and a heating part are arranged on the supporting plate, the heating part is rotationally arranged in the shell, and a plurality of containing grooves are evenly formed in the heating part in the circumferential direction; the sampling structure is arranged above the shell, and a sampling opening is formed in the top surface of the shell in a penetrating manner; wherein the shell is provided with a through hole opposite to the bottom surface of the groove. The effects of heating the plurality of sample bottles at the same time and improving the detection efficiency are achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of detection equipment, and particularly relates to a head space sampler. Background Art

[0002] The headspace sampler is a convenient and fast sample pretreatment method in gas chromatography. Its principle is to place the sample to be tested in a closed container, heat it to make the volatile components evaporate from the sample matrix, reach equilibrium in the gas-liquid 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.

[0003] Chinese utility model patent CN219179322U discloses a head space sampler, including a first mounting plate, a heating chamber and a second mounting plate, a gas chromatograph is mounted on the top of the first mounting plate, a heating chamber is mounted on the top of the first mounting plate, a second mounting plate is mounted on the top of the heating chamber, a cylinder is mounted on the top of the second mounting plate, a lifting block is mounted on the output end of the cylinder, a movable plate is movably mounted through one side of the heating chamber, a sample box is symmetrically mounted on the top of the movable plate, and second thermal insulation cotton is symmetrically mounted on both sides of the sample box.

[0004] However, when the sample bottle is heated by the heating chamber, only one sample can be heated. After replacing the sample bottle, it is necessary to wait for the sample bottle to heat up again before sampling can be performed, resulting in low detection efficiency. Utility Model Content

[0005] The purpose of the utility model is to provide a head space sampler for the above-mentioned existing technical problems, so as to solve the problems raised in the background technology.

[0006] In view of this, the utility model provides a head space sampler, characterized in that it includes:

[0007] A box body, wherein a groove is formed on the box body, a sample-laying disk is rotatably arranged in the groove, and a plurality of sample-laying grooves are arranged circumferentially based on the center of the sample-laying disk;

[0008] A support frame, the support frame is arranged inside the box body, and a first motor is fixedly arranged on the support frame, and an output shaft of the first motor is connected to the sample plate;

[0009] A heating structure is provided below the sample placing plate, and the heating structure comprises:

[0010] A support plate, wherein the support plate is arranged on the side wall of the support frame, and a shell is arranged on the support plate,

[0011] A heating part, the heating part is rotatably arranged in the shell, and a plurality of receiving grooves are evenly distributed circumferentially on the heating part;

[0012] A sampling structure, wherein the sampling structure is arranged above the shell, and a sampling port is arranged through the top surface of the shell;

[0013] Wherein, a through hole is arranged on the shell body opposite to the bottom surface of the groove.

[0014] In this technical solution, the operator places the sample bottle in the sample placement groove, and the sample placement plate is driven by the first motor to make the sample placement groove, the through hole, and the receiving groove cooperate, so that the sample bottle moves from the sample placement plate to the receiving groove, and is heated by the heating part. With the relative movement between the placement plate and the heating part, the number of sample bottles in the heating part can be gradually increased, and the heated sample bottles are moved to the bottom of the sampling structure, and are sampled by the sampling structure. The coordination between the placement plate and the heating part is conducive to improving the degree of automation of the device and the efficiency of detection.

[0015] In the above technical solution, further, the heating unit includes:

[0016] A material discharging tray, wherein the material discharging tray is evenly provided with receiving grooves in the circumferential direction;

[0017] A heating plate, which is arranged between the discharge tray and the shell and is used to heat the discharge tube;

[0018] The second motor is arranged above the shell, and the output shaft of the second motor is connected to the discharge tray.

[0019] In the present technical solution, the second motor can drive the discharge tray to rotate. Through the cooperation among the receiving groove, the through hole and the discharge tray, and with the relative rotation between the discharge tray and the sample tray, the sample bottles in the sample tray fall into the receiving groove one by one. By heating multiple sample bottles at the same time through the heating plate, the heating time required for heating the sample bottles can be shortened, which is beneficial to improving the detection efficiency.

[0020] In the above technical solution, further, the sampling structure includes:

[0021] A push rod, wherein the push rod is arranged inside the box body, and a mounting block is arranged on the output shaft;

[0022] A sampling tube, which is arranged below the mounting block and is used for sampling;

[0023] A perforation, wherein the perforation is provided on the shell body to avoid the sampling tube;

[0024] A fixed block, which is disposed between the push rod and the housing and is fixedly connected to the inner wall of the housing;

[0025] A guide member, which is arranged at the end of the fixed block and is used to guide the movement of the sampling tube;

[0026] Wherein, a connecting pipe is arranged on the outer wall of the mounting block, one end of the connecting pipe is connected to the sampling pipe, and the other end is connected to the external receiving device.

[0027] In this technical solution, the height of the mounting block and the sampling tube is controlled by the extension and retraction of the push rod output shaft, and the gas on the top of the sample bottle is extracted. The cooperation of the fixed plate and the guide member can guide the sampling tube to be accurately inserted into the sample bottle, avoiding the deviation of the sampling tube, which is conducive to improving the stability of the device.

[0028] In the above technical solution, further, a collecting structure is provided below the heating structure, and the collecting structure is used to collect the sample bottles after sampling.

[0029] In the above technical solution, further, the collection structure includes:

[0030] A discharge port, which is arranged through the support plate, between the sampling port and the through hole, and is connected to the containing groove;

[0031] A collecting trough, which is movably arranged below the support plate and has an opening between the collecting trough and the side wall of the box body, and the opening is used for taking and placing the collecting trough;

[0032] Wherein, a handle is fixedly arranged on the outer wall of the collecting tank at the opening.

[0033] In this technical solution, after the sampling of the sample bottles is completed, the discharge tray is driven to rotate by the second motor so that the receiving groove and the discharge port coincide with each other. The sample bottles in the receiving groove pass through the support plate from the discharge tray and fall into the collection groove to be collected, thereby facilitating the collection of the sample bottles after sampling and improving work efficiency.

[0034] In the above technical solution, further, a shielding cover is hingedly provided on the box body.

[0035] In the technical solution, the sample placement disk can be shielded by the shielding cover, so that dust can be prevented from falling on the sample placement disk and affecting the detection accuracy when the equipment is not in use.

[0036] In the above technical solution, further, a heat-insulating layer is provided on the inner wall of the shell.

[0037] In the present technical solution, the provision of a thermal insulation layer helps to reduce the loss of heat inside the shell, thereby saving electricity consumption.

[0038] In the above technical solution, further, the groove, sampling port, through hole, sample slot and top of the discharge port are all provided with chamfers.

[0039] In the present technical solution, the sample tube can be guided by chamfering, which facilitates the transfer of the sample tube between various components and helps to improve the stability of the equipment.

[0040] The beneficial effects of the utility model are:

[0041] 1. The operator places the sample bottle in the sample placement slot. The sample placement plate is driven by the first motor to make the sample placement slot, through hole and receiving slot cooperate, so that the sample bottle moves from the sample placement plate to the receiving slot and is heated by the heating part. With the relative movement between the placement plate and the heating part, the number of sample bottles in the heating part can be gradually increased. After the sample bottles are heated, they move to the bottom of the sampling structure and are sampled by the sampling structure. The coordination between the placement plate and the heating part is conducive to improving the degree of automation of the device and the efficiency of detection.

[0042] 2. After the sampling of the sample bottles is completed, the discharge tray is driven to rotate by the second motor so that the receiving slot coincides with the discharge port. The sample bottles in the receiving slot pass through the support plate from the discharge tray and fall into the collection slot for collection, which facilitates the collection of the sample bottles after sampling and improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 It is a three-dimensional cross-sectional view of the utility model;

[0044] Figure 2 It is a three-dimensional diagram of the utility model;

[0045] Figure 3 It is a schematic diagram of the sampling structure of the utility model;

[0046] Figure 4 This is an exploded view of the heating part of the utility model;

[0047] Figure 5 This utility model Figure 2 A magnified image of area A;

[0048] The symbols in the figure are:

[0049] 1. Box body; 2. Groove; 3. Sample placing plate; 4. Sample placing slot; 5. Support frame; 6. First motor; 7. Heating structure; 701. Support plate; 702. Shell; 703. Second motor; 8. Heating part; 801. Discharging plate; 802. Accommodating slot; 803. Heating plate; 9. Through hole; 10. Collecting structure; 1001. Discharging port; 1002. Collecting slot; 1003. Opening; 1004. Handle; 11. Shielding cover; 12. Sampling structure; 1201. Push rod; 1202. Mounting block; 1203. Sampling tube; 1204. Connecting tube; 1205. Perforation; 1206. Fixing block; 1207. Guide. DETAILED DESCRIPTION

[0050] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0051] In the description of the present application, it should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. For ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0052] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0053] It should be noted that, in the description of the present application, the orientation or positional relationship indicated by terms such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise stated, these orientation words do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present application; the orientation words "inside and outside" refer to the inside and outside relative to the contour of each component itself.

[0054] It should be noted that, in the present application, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises one..." does not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be noted that the scope of the method and device in the embodiment of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0055] Embodiment 1:

[0056] Depend on Figure 1-Figure 5 As shown, the present embodiment provides a head space sampler, comprising: a box body 1, a groove 2 is provided on the box body 1, a sample placing disk 3 is rotatably provided in the groove 2, and a plurality of sample placing grooves 4 are circumferentially provided based on the center of the sample placing disk 3; a support frame 5, the support frame 5 is arranged inside the box body 1, and a first motor 6 is fixedly provided on the support frame 5, and the output shaft of the first motor 6 is connected to the sample placing disk 3; a heating structure 7, the heating structure 7 is arranged below the sample placing disk 3, and the heating structure 7 comprises: a support plate 701, the support plate 701 is arranged on the side wall of the support frame 5, and a shell 702 is arranged on the support plate 701, a heating part 8, the heating part 8 is rotatably provided in the shell 702, and a plurality of accommodating grooves 802 are uniformly provided circumferentially on the heating part 8; a sampling structure 12, the sampling structure 12 is arranged above the shell 702, and a sampling port is penetrated through the top surface of the shell 702; wherein, the shell 702 is provided with a through hole 9 opposite to the bottom surface of the groove 2.

[0057] The operator places the sample bottle in the sample slot 4, and the sample tray 3 is driven by the first motor 6 to make the sample slot 4, the through hole 9, and the receiving slot 802 cooperate, so that the sample bottle moves from the sample tray 3 to the receiving slot 802, and is heated by the heating unit 8. With the relative movement between the placement tray and the heating unit 8, the number of sample bottles in the heating unit 8 can be gradually increased, and the heated sample bottles move to the bottom of the sampling structure 12, and are sampled by the sampling structure 12. The cooperation between the material tray 801 and the heating unit 8 is conducive to improving the automation of the device and the efficiency of detection.

[0058] Furthermore, the heating part 8 includes: a discharge tray 801, on which receiving grooves 802 are evenly distributed circumferentially; a heating plate 803, which is arranged between the discharge tray 801 and the shell 702 to heat the sample tube; a second motor 703, which is arranged above the shell 702, and the output shaft of the second motor 703 is connected to the discharge tray 801.

[0059] The second motor 703 can drive the discharge tray 801 to rotate. Through the cooperation among the receiving groove 802, the through hole 9 and the discharge tray, and with the relative rotation between the discharge tray 801 and the sample tray 3, the sample bottles in the sample tray 4 fall into the receiving groove 802 in sequence. By heating a plurality of sample bottles at the same time through the heating plate 803, the heating time required for the sample bottles can be shortened, which is beneficial to improving the detection efficiency.

[0060] Embodiment 2:

[0061] Depend on Figure 1-Figure 4 As shown, this embodiment provides a head space sampler, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0062] Furthermore, the sampling structure 12 includes: a push rod 1201, which is arranged inside the housing 1, and a mounting block 1202 is arranged on the output shaft; a sampling tube 1203, which is arranged below the mounting block 1202 for sampling; a through hole 1205, which is opened on the shell 702 to avoid the sampling tube 1203; a fixed block 1206, which is arranged between the push rod 1201 and the shell 702 and fixedly connected to the inner wall of the housing 1; a guide member 1207, which is arranged at the end of the fixed block 1206 to guide the movement of the sampling tube 1203; wherein a connecting tube 1204 is arranged on the outer wall of the mounting block 1202, one end of the connecting tube 1204 is connected to the sampling tube 1203, and the other end is connected to an external receiving device.

[0063] By extending and retracting the output shaft of the push rod 1201, the height of the mounting block 1202 and the sampling tube 1203 is controlled to extract the gas on the top of the sample bottle. By cooperating with the fixed plate and the guide 1207, the sampling tube 1203 can be accurately inserted into the sample bottle to avoid the deviation of the sampling tube 1203, which is conducive to improving the stability of the device.

[0064] Furthermore, a collecting structure 10 is provided below the heating structure 7, and the collecting structure 10 is used for collecting sample bottles after sampling, and the collecting structure 10 includes: a discharge port 1001, and the discharge port 1001 is provided through the support plate 701, and is located between the sampling port and the through hole 9, and is connected to the accommodating groove 802; a collecting groove 1002, and the collecting groove 1002 is movably provided below the support plate 701, and an opening 1003 is provided between the collecting groove 1002 and the side wall of the box body 1, and the opening 1003 is used for taking and placing the collecting groove 1002; wherein, a handle 1004 is fixedly provided on the outer wall of the collecting groove 1002 at the opening 1003.

[0065] After the sampling of the sample bottles is completed, the discharge tray 801 is driven to rotate by the second motor 703, so that the receiving slot 802 coincides with the discharge port 1001, and the sample bottles in the receiving slot 802 pass through the support plate 701 from the discharge tray 801 and fall into the collection slot 1002, where they are collected, thereby facilitating the collection of the sample bottles after sampling and improving work efficiency.

[0066] Furthermore, a shielding cover 11 is hingedly provided on the box body 1 .

[0067] The sample plate 3 can be shielded by the shielding cover 11, so that dust can be prevented from falling on the sample plate 3 and affecting the detection accuracy when the device is not in use.

[0068] Furthermore, a heat-insulating layer is provided on the inner wall of the shell 702 .

[0069] The provision of the thermal insulation layer helps to reduce the loss of heat inside the shell 702, thereby saving electricity consumption.

[0070] Furthermore, the groove 2, the sampling port, the through hole 9, the sample slot 4, and the top of the discharge port 1001 are all provided with chamfers.

[0071] The sample tube can be guided by chamfering to facilitate the transfer of the sample tube between various components, which is beneficial to improving the stability of the equipment.

[0072] The embodiments of the present application are described above in conjunction with the accompanying drawings. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A head space sampler, characterized in that ,include: A box body (1), wherein a groove (2) is provided on the box body (1), a sample placing disk (3) is rotatably arranged in the groove (2), and a plurality of sample placing grooves (4) are arranged in a circumferential direction based on the center of the sample placing disk (3); A support frame (5), the support frame (5) is arranged inside the box body (1), and a first motor (6) is fixedly arranged on the support frame (5), and an output shaft of the first motor (6) is connected to the sample placing plate (3); A heating structure (7), the heating structure (7) is arranged below the sample placing plate (3), and the heating structure (7) comprises: A support plate (701), wherein the support plate (701) is arranged on a side wall of the support frame (5), and a housing (702) is arranged on the support plate (701), A heating part (8), the heating part (8) being rotatably disposed in the housing (702), and a plurality of receiving grooves (802) being evenly distributed circumferentially on the heating part (8); A sampling structure (12), wherein the sampling structure (12) is arranged above the housing (702), and a sampling port is provided through the top surface of the housing (702); Wherein, a through hole (9) is arranged on the shell (702) and opposite to the bottom surface of the groove (2).

2. A head space sampler according to claim 1, characterized in that, The heating unit (8) comprises: A material discharging tray (801), wherein the material discharging tray (801) is evenly provided with receiving grooves (802) on the circumference thereof; A heating plate (803), the heating plate (803) being arranged between the material placing tray (801) and the housing (702) for heating the placing tube; The second motor (703) is arranged above the housing (702), and the output shaft of the second motor (703) is connected to the discharge tray (801).

3. A head space sampler according to claim 1, characterized in that, The sampling structure (12) comprises: A push rod (1201), wherein the push rod (1201) is arranged inside the box body (1), and a mounting block (1202) is arranged on the output shaft; A sampling tube (1203), the sampling tube (1203) is arranged below the mounting block (1202) and is used for sampling; A perforation (1205), wherein the perforation (1205) is provided on the housing (702) to avoid the sampling tube (1203); A fixed block (1206), the fixed block (1206) being arranged between the push rod (1201) and the housing (702) and being fixedly connected to the inner wall of the box body (1); A guide member (1207), wherein the guide member (1207) is arranged at the end of the fixed block (1206) and is used to guide the movement of the sampling tube (1203); A connecting tube (1204) is provided on the outer wall of the mounting block (1202), one end of the connecting tube (1204) is connected to the sampling tube (1203), and the other end is connected to an external receiving device.

4. A head space sampler according to claim 1, characterized in that, A collecting structure (10) is provided below the heating structure (7), and the collecting structure (10) is used to collect sample bottles after sampling.

5. A head space sampler according to claim 4, characterized in that: The collecting structure (10) comprises: A discharge port (1001), the discharge port (1001) is disposed through the support plate (701), is located between the sampling port and the through hole (9), and is connected to the containing groove (802); A collecting trough (1002), the collecting trough (1002) being movably disposed below the support plate (701), and having an opening (1003) disposed between the collecting trough (1002) and the side wall of the box body (1), the opening (1003) being used for taking in and placing the collecting trough (1002); A handle (1004) is fixedly provided on the outer wall of the collecting tank (1002) at the opening (1003).

6. A head space sampler according to claim 1, characterized in that: A shielding cover (11) is hingedly provided on the box body (1).

7. A head space sampler according to claim 1, characterized in that: A heat-insulating layer is provided on the inner wall of the shell (702).

8. A head space sampler according to any one of claims 1 to 5, characterized in that The groove (2), the sampling port, the through hole (9), the sample slot (4), and the top of the discharge port (1001) are all provided with chamfers.

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