Portable gas chromatograph

Abstract

The utility model discloses a portable gas chromatograph, which relates to the technical field of gas chromatography, and comprises a gas chromatograph body, the rear side of the gas chromatograph body is provided with a storable walking assembly, the walking assembly comprises a groove, the groove is provided with a fixed shaft, the outer wall of the fixed shaft is rotatably connected with a connecting block, and the connecting block is connected with the gas chromatograph body. Rollers are connected to the ends, away from the fixing shafts, of the connecting blocks; a positioning rod is inserted into the side face of the connecting block, and at least two inserting holes for the positioning rod to be inserted are formed in the direction, facing the positioning rod and perpendicular to the positioning rod, of the fixing shaft. According to the gas chromatograph, the roller is arranged on the rear side surface of the gas chromatograph body, and is accommodated in the groove through the matching of structures such as the fixed shaft, the connecting block and the positioning rod, so that no extra space is occupied, the roller can be conveniently taken out from the groove when the gas chromatograph is used, and the gas chromatograph can be moved by utilizing the roller when the gas chromatograph body is inclined backwards; operation is simple and safe, and single-person operation can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of gas chromatography, in particular to a portable gas chromatograph. Background Art

[0002] In the field of chemical analysis, gas chromatographs are an efficient and accurate analytical tool widely used for qualitative and quantitative analysis of various complex mixtures. However, traditional gas chromatographs are typically bulky and heavy, which not only limits their flexibility and convenience, but also makes them difficult to move and store.

[0003] Some existing gas chromatographs are made portable by installing wheels on their bottoms. Although this method is convenient for movement, it has the following problems:

[0004] 1. It takes up a large space: When the wheels cannot be stored, the overall size and space occupied by the gas chromatograph will be relatively large, which will cause inconvenience when the gas chromatograph needs to be moved or stored, especially in occasions with limited space, such as a small space in a laboratory or when it is used outdoors.

[0005] 2. Low safety: When used on an indoor workbench, the rollers are exposed to the field of vision, which may easily cause scratches on people or objects.

[0006] 3. Poor stability: When a gas chromatograph cannot be stored on rollers, the presence of the rollers may cause the instrument to slide easily when placed at rest, thereby reducing its stability. This may bring potential risks to chemical analysis work that requires precise operation.

[0007] 4. Easy entry of debris: The rollers raise the instrument, leaving a large space under the instrument base. When used on a workbench, this space is prone to the entry of debris, such as dust and debris, which may affect the performance and accuracy of the instrument.

[0008] Some existing technologies utilize retractable wheels installed at the bottom of gas chromatographs, such as the portable gas chromatograph disclosed in patent CN109442150A. These wheels can be extended and retracted by rotating a handwheel. However, there are still issues with the bottom of the gas chromatograph being easily infiltrated by debris if the wheels are forgotten to be retracted. Furthermore, the gas chromatograph cannot be placed stably unless the wheels are retracted. Utility Model Content

[0009] In response to one or more deficiencies in the above-mentioned prior art, the present invention provides a portable gas chromatograph, which can realize the portable movement of the gas chromatograph, and at the same time, the rollers can be conveniently stored or extended, and can be operated by one person, which is safe and labor-saving; the rollers after storage do not take up space, the structure is simple, and the presence of the rollers does not affect the stable placement of the gas chromatograph on the ground or platform, the gas chromatograph has good stability and good overall aesthetics.

[0010] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0011] A portable gas chromatograph includes a gas chromatograph body, and a retractable walking assembly is provided on the rear side of the gas chromatograph body. The walking assembly includes a groove, and a fixed fixed shaft is installed in the groove. The outer wall of the fixed shaft is rotatably connected to a connecting block, and the end of the connecting block away from the fixed shaft is connected to a roller; a positioning rod is inserted into the side of the connecting block, and the fixed shaft has at least two jacks for inserting the positioning rod in the direction toward the positioning rod and perpendicular to the positioning rod.

[0012] Preferably, a limiting block is installed at one end of the positioning rod away from the connecting block, and a tension spring is installed between the limiting block and the connecting block and is sleeved on the outer wall of the positioning rod, which facilitates the positioning rod to be inserted into the socket and prevents the positioning rod from detaching from the connecting block, thereby improving the stability of the structure.

[0013] Preferably, a rotation groove is provided through the top of the connecting block, and the fixed shaft is located inside the rotation groove; a friction sleeve is provided between the outer wall of the fixed shaft and the rotation groove, which is used to increase the friction between the fixed shaft and the inner wall of the rotation groove to prevent the connecting block from rotating spontaneously under non-human operation; the friction sleeve is provided with a notch adapted to the socket for the positioning rod to be inserted.

[0014] Preferably, a through slot is formed through one side of the connecting block, a connecting shaft is fixedly mounted on the inner wall of the through slot, and the shaft hole of the roller is rotatably connected to the connecting shaft, thereby enabling the roller to rotate relative to the connecting block.

[0015] Preferably, a movable groove is provided at one end of the connecting block for mounting the roller, the through groove is communicated with the interior of the movable groove, the roller is arranged in the movable groove, and the movable groove forms a limit for the rotation of the roller.

[0016] Preferably, the connecting shaft is connected to the through slot by welding.

[0017] Preferably, the outer wall of the roller is provided with a rubber sleeve for increasing the friction between the roller and the ground, thereby playing an anti-skid and buffering role during the movement of the gas chromatograph.

[0018] Preferably, two rectangular grooves are provided on the upper rear side of the gas chromatograph body, and a vertical connecting rod is fixedly installed in the rectangular groove. The outer wall of the connecting rod is rotatably connected to a sleeve, and one side of the sleeve is threadedly connected to a handle, and one end of the handle abuts against the outer wall of the connecting rod.

[0019] Preferably, the outer wall of the handle is provided with an anti-slip cover, and the outer surface of the anti-slip cover is processed with anti-slip particles.

[0020] Preferably, a pull ring is installed on the outer side of the limit block to facilitate operation by staff.

[0021] By adopting the above technical solution, the beneficial effects of the utility model are as follows:

[0022] 1. The utility model sets the roller on the rear side of the gas chromatograph body, and stores the roller in the groove through the cooperation of the fixed shaft, the connecting block and the positioning rod, etc., which does not take up extra space. When in use, the roller can be easily taken out from the groove. The gas chromatograph body can be tilted backward to use the roller to move the gas chromatograph. The operation is simple and safe, and can be done by one person.

[0023] 2. The utility model realizes the portability of the gas chromatograph while ensuring its aesthetics, and does not require a bottom mounting structure. It has good stability after storage, and there will be no problem of debris being present at the bottom of the gas chromatograph.

[0024] 3. The utility model is also provided with a retractable handle assembly, which can be used in conjunction with the walking assembly to take out the handle and apply force when moving, making it convenient to push or pull the gas chromatograph body, further improving its portability; at the same time, it can be stored in the rectangular slot after the movement is completed, so that the overall volume of the gas chromatograph is small, and it is simple and beautiful. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0026] Figure 1 This is a schematic structural diagram of an embodiment of the present utility model;

[0027] Figure 2 This is a front cross-sectional schematic diagram of an embodiment of the present utility model;

[0028] Figure 3 This is a schematic diagram of the vibration mechanism structure of an embodiment of the utility model;

[0029] Figure 4 A side cross-sectional schematic diagram of an embodiment of the present utility model;

[0030] Figure 5It is a schematic top cross-sectional view of an embodiment of the present utility model.

[0031] Figure: 1, gas chromatograph body; 2, travel assembly; 3, rotating groove; 4, friction sleeve; 5, movable groove; 6, through groove; 7, connecting shaft; 8, rubber sleeve; 9, rectangular groove; 10, connecting rod; 11, sleeve; 12, grip; 13, anti-slip sleeve; 14, pull ring;

[0032] 201. Groove; 202. Fixed shaft; 203. Connecting block; 204. Roller; 205. Positioning rod; 206. Limit block; 207. Tension spring; 208. Socket. DETAILED DESCRIPTION

[0033] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0034] It should be noted that the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0035] Example 1

[0036] In a typical embodiment of the present application, a portable gas chromatograph is provided, such as Figure 1-5 As shown, it includes a gas chromatograph body 1, and a retractable walking component 2 is provided on the rear side of the gas chromatograph body 1. The walking component 2 includes two grooves 201 opened on the rear side of the gas chromatograph body, and a vertical fixed shaft 202 is fixedly installed between the upper and lower inner walls of the groove 201. The outer wall of the fixed shaft 202 is rotatably connected to a connecting block 203, and the end of the connecting block 203 away from the fixed shaft 202 is rotatably connected to a roller 204; a positioning rod 205 is inserted into the side of the connecting block 203, and the fixed shaft 202 is provided with at least two jacks for inserting the positioning rod in the direction toward the positioning rod and perpendicular to the positioning rod.

[0037] Specifically, if Figure 1 、 3As shown, in this embodiment, two grooves 201 are provided at the same height at the bottom of the rear side of the gas chromatograph body 1. A fixed shaft 202 is secured within the grooves by welding. A rotation groove 3 is provided through the top of the connecting block 203. The fixed shaft 202 is positioned within the rotation groove 3, and the connecting block 203 is rotatably connected to the fixed shaft 202 via the rotation groove 3. A friction sleeve 4 is mounted on the outer wall of the fixed shaft 202. The outer wall of the friction sleeve 4 mates with the inner wall of the rotation groove 3. The friction sleeve 4 has a notch that matches the socket 208 and allows the positioning rod to be inserted. The rotation groove 3 allows the fixed shaft 202 to be rotatably connected to the connecting block 203. The friction sleeve 4 increases the friction between the connecting block 203 and the fixed shaft 202, preventing the connecting block from rotating spontaneously without manual operation. This ensures a more stable connection between the connecting block and the fixed shaft, thereby improving the stability of the roller when it is stored.

[0038] like Figure 3 As shown, a positioning rod 205 is inserted into the side of the connecting block 203 facing the groove opening. A limit block 206 is installed on the end of the positioning rod 205 away from the connecting block. A tension spring 207 is installed between the limit block 206 and the connecting block 203, which is sleeved on the outside of the positioning rod 205. This facilitates the insertion of the positioning rod into the socket and prevents the positioning rod from being separated from the connecting block. In this embodiment, two sockets 208 are provided, one on the front side and the left side of the fixed shaft 202. The sockets can be blind holes or through holes. When the positioning rod 205 is inserted into the sockets, it connects the connecting block to the fixed shaft, limiting the rotation of the connecting block.

[0039] Of course, in other embodiments, the walking assembly can also be set on the front of the gas chromatograph body, or the walking assembly can be installed on both the front and back sides to facilitate pushing or pulling when moving in different directions, which can be selected according to actual needs.

[0040] In this embodiment, a through slot 6 is formed through one side of the connecting block 203, communicating with the interior of the movable slot 5. A connecting shaft 7 is fixedly mounted on the inner wall of the through slot 6. The axial hole of the roller 204 is rotatably connected to the connecting shaft 7, thereby enabling the roller to rotate relative to the connecting block. A movable slot 5 is formed at one end of the connecting block where the roller is mounted, and the roller is positioned within the movable slot, which limits the rotation of the roller.

[0041] Specifically, if Figure 3As shown, one end of the connecting block 203 is provided with a movable groove 5, and the roller 204 is rotatably connected to the inner wall of the movable groove 5. The width of the movable groove 5 is greater than the width of the roller 204, and the diameter of the roller is less than the height of the groove 201. The provision of the movable groove 5 facilitates the subsequent rotation of the roller 204 on the connecting block 203, avoiding the problem of the connecting block 203 limiting the rotation of the roller 204. A through groove 6 is provided on one side of the connecting block 203, which is connected to the interior of the movable groove 5. The inner wall of the through groove 6 is fixedly connected to a connecting shaft 7. The axial hole of the roller 204 is rotatably connected to the outer wall of the connecting shaft 7. By providing the through groove to install the connecting shaft 7, the connecting shaft and the roller are rotatably connected, and the roller is rotatably connected to one end of the connecting block. The connecting shaft 7 can be fixedly connected to the through groove 6 by welding.

[0042] In addition, a rubber sleeve 8 is installed on the outer wall of the roller 204, and an annular cavity is integrally formed inside the rubber sleeve 8. The annular cavity is tightly attached to the outer wall of the roller. By setting the rubber sleeve 8, the friction between the roller 204 and the ground is increased, which has an anti-slip effect and a buffering effect.

[0043] For ease of use, a pull ring 14 is mounted on the outer wall of the limit block 206. The pull ring 14 is integrally formed with multiple rounded corners. The pull ring 14 facilitates manual pulling of the limit block 206, making operation more convenient and quick. Pulling the limit block 206 causes the positioning rod 205 to slide on the connecting block 203 and disengage from one of the sockets 208 on the fixed shaft 202, thereby facilitating rotation of the connecting block 203. The elastic reset principle of the tension spring 207 facilitates insertion of the positioning rod 205 into the other socket 208, making it easier to store the roller in the groove or remove the roller from the groove. After the roller is removed from the groove, the gas chromatograph body 1 can be tilted backward and the roller 204 can be used to move the gas chromatograph. When the roller is stored in the groove, it does not increase the space occupied by the gas chromatograph body 1, making the gas chromatograph body both easy to move and convenient to install and use.

[0044] like Figure 1 、 5 As shown, two rectangular grooves 9 are provided on the upper rear side of the gas chromatograph body 1, and a connecting rod 10 is installed between the inner top wall and the inner bottom wall of the rectangular groove 9. The outer wall of the connecting rod 10 is rotatably connected to a sleeve 11, and a threaded hole is provided on one side of the sleeve 11, through which a handle 12 is threadedly connected, and the inner end of the handle 12 is in conflict with the outer wall of the connecting rod 10, and the handle can be rotated to make it contact with or away from the connecting rod.

[0045] In this embodiment, an anti-slip sleeve 13 is coaxially installed on the outer wall of the handle 12, and the outer surface of the anti-slip sleeve 13 is processed with integrally formed anti-slip particles. By providing the anti-slip sleeve 13, hard contact between the human hand and the handle 12 can be avoided, thereby improving the user's comfort in the process of grasping the handle 12. By providing the anti-slip particles, the friction between the human hand and the anti-slip sleeve 13 is increased, thereby avoiding the phenomenon of slipping from the hand. The handle 12 on the sleeve 11 is rotated by hand so that the handle 12 contacts or moves away from the outer wall of the connecting rod 10, thereby facilitating the handle 12 to be located in the rectangular groove 9 or to be taken out of the rectangular groove 9. After taking the handle 12 out of the rectangular groove 9, the handle 12 is rotated to press against the connecting rod 10, so that the sleeve 11 is difficult to rotate on the connecting rod 10, thereby facilitating manual force application during the process of moving the gas chromatograph body 1, thereby avoiding the occurrence of slipping of the hands and making the gas chromatograph body 1 less likely to be damaged after accidentally tipping over, thereby ensuring the service life of the gas chromatograph body 1. At the same time, after the handle 12 is stored in the rectangular groove 9, it will not increase the space occupied by the gas chromatograph body 1, making the gas chromatograph body easy to push and pull, and very portable.

[0046] Working principle:

[0047] The operator manually pulls the stopper 206 via the pull ring 14, causing the positioning rod 205 to slide on the connecting block 203 and disengage one of the sockets 208 on the fixed shaft 202, thereby facilitating the rotation of the connecting block 203. The tension spring 207 then utilizes its elastic return principle to insert the positioning rod 205 into the other socket 208, allowing the roller to be rotated and extended from the groove 201. This allows the gas chromatograph body 1 to tilt backward and the roller 204 on the back to be used to move the gas chromatograph body 1. After the movement is completed, the stopper 206 is pulled to disengage the positioning rod 205 from the connected socket, and the connecting block 203 is rotated in the opposite direction to insert the positioning rod into the other socket 208, thereby storing the roller in the groove 201. This does not increase the space occupied by the gas chromatograph body 1, making the gas chromatograph portable and convenient to use.

[0048] In addition, when using the roller to move the gas chromatograph body, considering the gripping position of the human hand, in this embodiment, the staff can rotate the handle 12 on the sleeve 11 to move the handle 12 away from the outer wall of the connecting rod 10, and then rotate the handle 12 to drive the sleeve 11 to rotate around the connecting rod 10, extend the handle 12 out of the rectangular groove 9, and rotate the handle 12 in the opposite direction to make it abut against the connecting rod 10, thereby limiting the relative rotation of the sleeve and the connecting rod, thereby facilitating the gripping of the handle 12 and applying force during the movement of the gas chromatograph body 1. The anti-slip cover 13 can prevent the hand from slipping out, and even if the gas chromatograph body accidentally tips over, it is not easily damaged. Moreover, after the handle 12 is rotated back into the rectangular groove, it does not increase the occupied space of the gas chromatograph body.

[0049] It should be noted that the above embodiments are intended only to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Those skilled in the art will appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A portable gas chromatograph, characterized in that: It includes a gas chromatograph body, and a retractable walking component is provided on the rear side of the gas chromatograph body. The walking component includes a groove, and a fixed fixed shaft is installed in the groove. The outer wall of the fixed shaft is rotatably connected to a connecting block, and the end of the connecting block away from the fixed shaft is connected to a roller; a positioning rod is inserted into the side of the connecting block, and the fixed shaft has at least two sockets for inserting the positioning rod in the direction toward the positioning rod and perpendicular to the positioning rod.

2. A portable gas chromatograph according to claim 1, characterized in that: A limiting block is installed at one end of the positioning rod away from the connecting block, and a tension spring sleeved on the outer wall of the positioning rod is installed between the limiting block and the connecting block.

3. A portable gas chromatograph according to claim 1, characterized in that: A rotation groove is formed through the top of the connecting block, and the fixed shaft is located inside the rotation groove; a friction sleeve is provided between the outer wall of the fixed shaft and the rotation groove.

4. A portable gas chromatograph according to claim 1, characterized in that: A through slot is formed through one side of the connecting block, a connecting shaft is fixedly mounted on the inner wall of the through slot, and the shaft hole of the roller is rotatably connected to the connecting shaft.

5. A portable gas chromatograph according to claim 4, characterized in that: A movable groove is provided at one end of the connecting block for mounting the roller, the through groove is communicated with the interior of the movable groove, and the roller is arranged in the movable groove.

6. A portable gas chromatograph according to claim 4, characterized in that: The connecting shaft and the through slot are welded.

7. A portable gas chromatograph according to claim 1, characterized in that: The outer wall of the roller is provided with a rubber sleeve.

8. A portable gas chromatograph according to claim 1, characterized in that Two rectangular grooves are provided on the upper rear side of the gas chromatograph body, and vertical connecting rods are fixedly installed in the rectangular grooves. The outer wall of the connecting rod is rotatably connected to a sleeve, and one side of the sleeve is threadedly connected to a handle, and one end of the handle abuts against the outer wall of the connecting rod.

9. A portable gas chromatograph according to claim 8, characterized in that: The outer wall of the handle is covered with an anti-skid cover, and the outer surface of the anti-skid cover is processed with anti-skid particles.

10. The portable gas chromatograph according to claim 2, characterized in that: A pull ring is installed on the outer side of the limit block.

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