Gas chromatography sampling device

Abstract

The utility model relates to the technical field of gas chromatography, in particular to a gas chromatography sampling device which comprises a gas chromatograph and a bottom plate, the front end and the rear end of the bottom plate are fixedly connected with two fixing blocks, the upper ends of the four fixing blocks are in threaded connection with bolts, the upper end of the bottom plate is fixedly connected with a mounting frame, and the mounting frame is fixedly connected with a gas chromatograph. The rear end of the mounting frame is provided with three limiting sliding grooves penetrating through the inside and the outside, a control device is mounted in the middle of the upper end of the mounting frame in a penetrating mode, and the upper inner wall face and the lower inner wall face of the mounting frame are jointly and fixedly connected with two stabilizing rods. According to the gas chromatography sampling device disclosed by the utility model, the rotary motor accurately drives the screw rod to rotate, so that the lifting block in threaded connection with the screw rod realizes accurate vertical displacement, the sampling needle tube can be accurately aligned with the sampling port and inserted into the sampling port, the sampling position and depth are accurately controlled, the sampling precision and accuracy are greatly improved, and the sampling efficiency is improved. And the analysis error caused by the deviation of the sampling position is reduced.

Description

Technical Field

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

[0002] Gas chromatography is an important method widely used in the field of chemical analysis. It can effectively separate and detect components in various complex mixtures. In the gas chromatography analysis process, the injection device plays a vital role.

[0003] Traditional gas chromatography injection devices still have the following shortcomings: the structure of traditional gas chromatography injection devices is relatively simple and fixed, and it is difficult to ensure the consistency of the position and depth of each injection, which leads to deviations in the analysis results. Therefore, we introduce a gas chromatography injection device. Utility Model Content

[0004] The main purpose of the utility model is to provide a gas chromatography sampling device, which can effectively solve the problems in the background technology.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A gas chromatography injection device comprises a gas chromatograph and a base plate, wherein an injection head is fixedly connected to the front end of the upper end of the gas chromatograph, an injection port is provided at the upper end of the injection head, two fixing blocks are fixedly connected to the front and rear ends of the base plate, four upper ends of the fixing blocks are threadedly connected to bolts, and the lower ends of the four bolts are threadedly connected to the upper end of the gas chromatograph, a mounting bracket is fixedly connected to the upper end of the base plate, three limiting sliding grooves are provided at the rear end of the mounting bracket, a control device is installed at the middle part of the upper end of the mounting bracket, and two stabilizing rods are fixedly connected to the upper inner wall surface and the lower inner wall surface of the mounting bracket;

[0007] The control device includes a rotary motor, an upper coupling is fixedly installed at the output end of the rotary motor, a screw is fixedly connected to the lower end of the upper coupling, a lower end of the screw is fixedly connected to the lower coupling, a lifting assembly is threadedly connected to the outer surface of the screw, the lower end of the rotary motor is fixedly connected to the upper end of the mounting frame, and the output end of the rotary motor passes through the upper end of the mounting frame and extends into the mounting frame.

[0008] Preferably, the lower end of the lower coupling is movably connected to the lower inner wall surface of the mounting frame through a bearing.

[0009] By adopting the above technical solution: through the bearing connection, the direct friction between the lower coupling and the lower inner wall surface of the mounting frame is effectively reduced, the wear degree of the components is reduced, and the service life of the lower coupling and the mounting frame is extended.

[0010] Preferably, the lifting assembly includes a lifting block, the rear end of the lifting block is fixedly connected to a connecting plate, the rear end of the connecting plate is fixedly connected to three equidistantly distributed limit sliders, the rear ends of the three limit sliders are commonly fixedly connected to the limit plate, the front end of the lifting block is fixedly connected to an installation assembly, and the inner wall surface of the lifting block is threadedly connected to the outer surface of the screw.

[0011] By adopting the above technical solution: the threaded connection between the lifting block and the screw rod makes the lifting action precise and controllable, and the height position of the installation component can be accurately adjusted to meet the height requirements of the injection.

[0012] Preferably, the three limiting sliding blocks are movably sleeved in the corresponding three limiting sliding grooves.

[0013] By adopting the above technical solution: the cooperation between the limiting slider and the limiting slide groove provides precise guidance for the movement of the lifting block, ensuring that it always moves along the established vertical direction without left or right deviation or tilt, thereby ensuring the accuracy and stability of the injection position.

[0014] Preferably, the mounting assembly includes a mounting plate, the left and right ends of the mounting plate are fixedly connected to stabilizing blocks, the upper ends of the two stabilizing blocks are provided with holes that pass through up and down, the front end of the mounting plate is fixedly connected to a support plate, the front end of the support plate is fixedly connected to a mounting ring, the mounting ring is sleeved with an injection assembly, and the rear end of the mounting plate is fixedly connected to the front end of the lifting block.

[0015] By adopting the above technical solution: the design of the mounting ring facilitates the sleeve installation of the sampling assembly, and is convenient for quickly replacing sampling assemblies of different specifications or types according to different experimental requirements, thereby improving the versatility and flexibility of the device.

[0016] Preferably, the two stabilizing rods are movably sleeved in the corresponding two sleeve holes respectively.

[0017] By adopting the above technical solution: the socketing of the stabilizing rod and the sleeve hole provides additional guidance and support for the movement of the installation component, further enhancing its stability during the lifting process, reducing shaking and deviation, and ensuring the accuracy of the injection.

[0018] Preferably, the injection assembly includes a syringe, an injection valve is fixedly installed on the lower end of the syringe, an injection needle is fixedly installed on the lower end of the injection valve, and the syringe is sleeved in the mounting ring.

[0019] By adopting the above technical solution: the setting of the injection valve can flexibly adjust the injection speed of the sample to adapt to different experimental requirements and sample characteristics, which helps to optimize the separation effect and improve the detection accuracy.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. In the present invention, the rotary motor precisely drives the screw to rotate, so that the lifting block connected to the screw thread can achieve precise vertical displacement, which enables the injection needle to be accurately aligned with the injection port and inserted, and accurately controls the injection position and depth, greatly improving the injection precision and accuracy, and reducing the analysis error caused by injection position deviation;

[0022] 2. In the present invention, the cooperation between the limit slider and the limit slot, as well as the socket connection between the sleeve hole on the stabilizing block and the stabilizing rod, further ensure the linearity and stability of lifting and moving;

[0023] 3. In the present invention, the setting of the injection valve can accurately control the injection volume and injection speed of the sample, which helps to improve the accuracy and repeatability of the analysis results. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the overall structure of a gas chromatography injection device of the present utility model;

[0025] Figure 2 This is a schematic diagram of the overall structure of a control device for a gas chromatography injection device according to the present invention;

[0026] Figure 3 This is a schematic diagram of the overall structure of a lifting assembly of a gas chromatography injection device of the present invention;

[0027] Figure 4 This is a schematic diagram of the overall structure of the installation assembly of a gas chromatography injection device of the present invention;

[0028] Figure 5 The utility model is a schematic diagram of the overall structure of the sampling assembly of the gas chromatography sampling device.

[0029] In the figure: 1. Gas chromatograph; 2. Injection head; 3. Injection port; 4. Base plate; 5. Fixing block; 6. Bolt; 7. Mounting bracket; 8. Limiting slide; 9. Control device; 10. Stabilizing rod; 91. Rotating motor; 92. Upper coupling; 93. Screw; 94. Lower coupling; 95. Lifting assembly; 951. Lifting block; 952. Connecting plate; 953. Limiting slider; 954. Limiting plate; 955. Mounting assembly; 9551. Mounting plate; 9552. Stabilizing block; 9553. Hole; 9554. Support plate; 9555. Mounting ring; 9556. Injection assembly; 95561. Syringe; 95562. Injection valve; 95563. Injection needle. DETAILED DESCRIPTION

[0030] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0031] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," "the other end," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "connected," etc. should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0033] See also Figure 1-4 , the utility model provides a technical solution:

[0034] A gas chromatography injection device comprises a gas chromatograph 1 and a base plate 4, wherein an injection head 2 is fixedly connected to the front of the upper end of the gas chromatograph 1, and an injection port 3 that passes through the upper end of the injection head 2 is provided. Two fixing blocks 5 are fixedly connected to the front and rear ends of the base plate 4, and bolts 6 are threadedly connected to the upper ends of the four fixing blocks 5. The lower ends of the four bolts 6 are threadedly connected to the upper end of the gas chromatograph 1, and a mounting bracket 7 is fixedly connected to the upper end of the base plate 4. Three limiting slide grooves 8 that pass through the inner and outer ends are provided at the rear end of the mounting bracket 7. A control device 9 is inserted and installed in the middle of the upper end of the mounting bracket 7, and two stabilizing rods 10 are fixedly connected to the upper inner wall and the lower inner wall of the mounting bracket 7.

[0035] In this embodiment, the control device 9 includes a rotary motor 91, the output end of the rotary motor 91 is fixedly installed with an upper coupling 92, the lower end of the upper coupling 92 is fixedly connected to a screw 93, the lower end of the screw 93 is fixedly connected to a lower coupling 94, the outer surface of the screw 93 is threadedly connected to a lifting assembly 95, the lower end of the rotary motor 91 is fixedly connected to the upper end of the mounting frame 7, the output end of the rotary motor 91 passes through the upper end of the mounting frame 7 and extends into the mounting frame 7; the lower end of the lower coupling 94 is movably connected to the lower inner wall surface of the mounting frame 7 through a bearing; the lifting assembly 95 includes a lifting block 951, the rear end of the lifting block 951 is fixedly connected to a connecting plate 952, the rear end of the connecting plate 952 is fixedly connected to three equidistantly distributed limit sliders 953, the rear ends of the three limit sliders 953 are commonly fixedly connected to the limit plate 954, the front end of the lifting block 951 is fixedly connected to the mounting assembly 955, the inner wall surface of the lifting block 951 is threaded with the outer surface of the screw 93 The three limit sliders 953 are respectively movably connected to the corresponding three limit slide grooves 8; the mounting assembly 955 includes a mounting plate 9551, the left and right ends of the mounting plate 9551 are fixedly connected to a firm block 9552, the upper ends of the two firm blocks 9552 are provided with a sleeve hole 9553 that passes through the upper and lower ends, the front end of the mounting plate 9551 is fixedly connected to a support plate 9554, the front end of the support plate 9554 is fixedly connected to a mounting ring 9555, and the mounting ring 9555 is sleeved inside There is an injection assembly 9556, the rear end of the mounting plate 9551 is fixedly connected to the front end of the lifting block 951; the two stabilizing rods 10 are movably sleeved in the corresponding two sleeve holes 9553 respectively; the injection assembly 9556 includes a syringe 95561, the lower end of the syringe 95561 is fixedly installed with an injection valve 95562, the lower end of the injection valve 95562 is fixedly installed with an injection needle 95563, and the syringe 95561 is sleeved in the mounting ring 9555.

[0036] It should be noted that the present invention is a gas chromatography injection device. During use, first, the base plate 4 is placed on the gas chromatograph 1 and fixed to the gas chromatograph 1 by the bolts 6 on the four fixing blocks 5 to ensure stability during use. When the injection operation is required, the rotary motor 91 is started, and the output end of the rotary motor 91 rotates, driving the screw 93 to rotate through the upper coupling 92. Since the screw 93 is threadedly connected to the lifting block 951, the rotation of the screw 93 will cause the lifting block 951 to move in the vertical direction. The three limit sliders 953 on the connecting plate 952 at the rear end of the lifting block 951 are respectively movably connected in the corresponding three limit slide grooves 8, which limits the lifting block 951 to move only in the vertical direction, ensuring the stability and accuracy of its movement. At the same time, the limit plate 954 at the rear end of the connecting plate 952 prevents the limit slider 953 disengages from the limiting slide 8, and as the lifting block 951 moves, the mounting assembly 955 connected to its front end also moves up and down. The sleeve holes 9553 on the two stabilizing blocks 9552 on the mounting plate 9551 in the mounting assembly 9555 are respectively movably sleeved on the two stabilizing rods 10, further ensuring the stability and linearity of the movement of the mounting assembly 9555. The syringe 95561 in the injection assembly 9556 sleeved in the mounting ring 9555 is injected through the injection valve 95562 and the injection needle 95563. When the lifting block 951 drives the injection assembly 9556 to move to a suitable height, the injection needle 95563 is aligned with the injection port 3 and inserted into the injection port 3, and then the injection valve 95562 is opened, and the syringe 95561 is pushed to inject the sample into the injection head 2, so that the sample enters the gas chromatograph 1 for analysis.

[0037] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A gas chromatography sample injection device, comprising a gas chromatograph (1) and a base plate (4), characterized in that: The front portion of the upper end of the gas chromatograph (1) is fixedly connected with an injection head (2), and the upper end of the injection head (2) is provided with an injection port (3) that passes through inside and outside. The front and rear ends of the bottom plate (4) are fixedly connected with two fixing blocks (5), and the upper ends of the four fixing blocks (5) are threadedly connected with bolts (6), and the lower ends of the four bolts (6) are threadedly connected to the upper end of the gas chromatograph (1). The upper end of the bottom plate (4) is fixedly connected with a mounting frame (7), and the rear end of the mounting frame (7) is provided with three limiting sliding grooves (8) that pass through inside and outside. A control device (9) is inserted and installed in the middle of the upper end of the mounting frame (7), and the upper inner wall surface and the lower inner wall surface of the mounting frame (7) are fixedly connected with two stabilizing rods (10); The control device (9) comprises a rotary motor (91), an upper coupling (92) is fixedly mounted on the output end of the rotary motor (91), a screw (93) is fixedly connected to the lower end of the upper coupling (92), a lower end of the screw (93) is fixedly connected to the lower coupling (94), an outer surface of the screw (93) is threadedly connected to a lifting assembly (95), the lower end of the rotary motor (91) is fixedly connected to the upper end of the mounting frame (7), and the output end of the rotary motor (91) passes through the upper end of the mounting frame (7) and extends into the mounting frame (7).

2. A gas chromatography sample injection device according to claim 1, characterized in that: The lower end of the lower coupling (94) is movably connected to the lower inner wall surface of the mounting frame (7) via a bearing.

3. A gas chromatography sample injection device according to claim 1, characterized in that: The lifting assembly (95) comprises a lifting block (951), the rear end of the lifting block (951) is fixedly connected to a connecting plate (952), the rear end of the connecting plate (952) is fixedly connected to three equally spaced limiting sliders (953), the rear ends of the three limiting sliders (953) are commonly fixedly connected to a limiting plate (954), the front end of the lifting block (951) is fixedly connected to a mounting assembly (955), and the inner wall surface of the lifting block (951) is threadedly connected to the outer surface of the screw rod (93).

4. A gas chromatography sample injection device according to claim 3, characterized in that: The three limiting sliding blocks (953) are movably sleeved in the corresponding three limiting sliding grooves (8).

5. A gas chromatography sample injection device according to claim 3, characterized in that: The mounting assembly (955) includes a mounting plate (9551), the left and right ends of the mounting plate (9551) are fixedly connected to a stabilizing block (9552), the upper ends of the two stabilizing blocks (9552) are provided with a sleeve hole (9553) that passes through the upper and lower ends, the front end of the mounting plate (9551) is fixedly connected to a support plate (9554), the front end of the support plate (9554) is fixedly connected to a mounting ring (9555), the mounting ring (9555) is sleeved with an injection assembly (9556), and the rear end of the mounting plate (9551) is fixedly connected to the front end of the lifting block (951).

6. A gas chromatography sample injection device according to claim 5, characterized in that: The two stabilizing rods (10) are movably sleeved in the corresponding two sleeve holes (9553).

7. A gas chromatography sample injection device according to claim 5, characterized in that: The injection assembly (9556) includes a syringe (95561), an injection valve (95562) is fixedly installed on the lower end of the syringe (95561), an injection needle (95563) is fixedly installed on the lower end of the injection valve (95562), and the syringe (95561) is sleeved in the mounting ring (9555).

Images