Multi-channel gas sample injection device

Abstract

The utility model discloses a multi-channel gas sample feeding device, and relates to the technical field of gas chromatographs. The device comprises a connecting device; the outer wall of the positioning device is rotationally connected with the outer wall of the connecting device; the positioning device comprises a stepping motor, the output end of the stepping motor is fixedly connected with an adjusting shaft, the inner wall of the adjusting shaft is slidably connected with a sliding block through a blind hole, the blind hole is formed in the wall of the top of the adjusting shaft, the top end of the interior of the sliding block is fixedly connected with a compression spring, and the outer wall of the sliding block is fixedly connected with a sleeving block. A star-shaped plate is arranged below the sleeving block, a clamping device is fixedly connected to the side wall of the exterior of the star-shaped plate, the connecting device and the positioning device are arranged to be matched with each other, stable flowing of a gas sample is ensured, meanwhile, gas can enter through multiple channels, and the angle position is controllable; and gas sample leakage caused by needle head damage due to deviation generated during personnel injection is prevented, and the purpose of multi-channel stable sample injection is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to gas chromatograph technical field, concretely relates to a kind of multi-channel gas sample injection device. BACKGROUND

[0002] In the field of gas analysis and detection, it is crucial to accurately introduce multi-channel gas samples into analysis equipment. Traditional gas injection devices often have some problems. On the one hand, the injection channel of gas samples is single, which cannot meet the demand of analyzing multiple gases simultaneously. On the other hand, during the injection operation, due to the lack of precise angle control, the personnel injecting gas samples may deviate, which may cause the needle to break and further cause the gas sample to leak, affecting the analysis results and possibly threatening the environment and personnel safety.

[0003] The device ensures the stable flow of gas samples by the cooperation of the connecting device and the positioning device, realizes multi-channel injection with controllable angle position, prevents needle breakage and gas leakage. At the same time, the clamping device is set to ensure the accuracy and stability of injection. SUMMARY

[0004] To solve the technical problems of the prior art, the utility model adopts the technical scheme of a multi-channel gas sample injection device, which includes a connecting device, a positioning device, and a clamping device. The outer wall of the positioning device is rotationally connected to the outer wall of the connecting device. The positioning device includes a stepper motor, the output end of which is fixedly connected to an adjusting shaft. The inner wall of the adjusting shaft is slidingly connected to a sliding block through a blind hole in the wall at the top of the adjusting shaft. The top end of the sliding block inside is fixedly connected to a compression spring. The outer wall of the sliding block is fixedly connected to a sleeve block. A star-shaped plate is arranged below the sleeve block. The side wall outside the star-shaped plate is fixedly connected to the clamping device. The side wall inside the star-shaped plate is fixedly connected to the outer wall of the adjusting shaft. The bottom end of the inner wall of the adjusting shaft is fixedly connected to the end of the compression spring away from the sliding block.

[0005] Preferably, the connecting device includes a fixed disc, the inner side wall of which is fixedly connected to a positioning tube. The inner wall of the fixed disc is fixedly connected to a guide nozzle. The outer wall of the bottom of the guide nozzle is fixedly connected to a communication tube. The bottom of the fixed disc is fixedly connected to a support block. The inner side wall of the positioning tube is slidingly connected to the outer wall of the adjusting shaft. The connecting device and the positioning device cooperate to ensure the stable flow of gas samples, allowing gas to enter through multiple channels, and the angle position is controllable to prevent the needle from breaking due to deviation during injection, causing the gas sample to leak.

[0006] Preferably, the clamping device comprises a fixed block, the outer wall of the bottom of the fixed block is fixedly connected with a limiting rod in a symmetrical mode, the outer wall of the limiting rod is slidably connected with a sliding block, the outer wall of the sliding block is rotatably provided with an adjusting rod, the outer wall of the adjusting rod is threadedly connected with the outer wall of the fixed block through a threaded groove, the threaded groove is arranged on the outer wall of the adjusting rod, and the outer wall of the fixed block is fixedly connected with the side wall of the outer part of the star-shaped plate.

[0007] The utility model discloses the beneficial effect is as follows:

[0008] 1. The utility model discloses a connecting device and positioning device are cooperated with each other through setting, ensure that the stable flow of gaseous sample can make gas multiple channel access to angle position controllable, prevent personnel from producing deviation when injecting and lead to needle damage and cause gaseous sample leakage.

[0009] 2. The utility model discloses a clamping device is set up, prevent gaseous sample in the sampling process, and the sampling needle appears leakage because of loosening, and then guarantee the accuracy and stability of sampling. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 It is the front view of the utility model;

[0011] Figure 2 It is the structure schematic view of the connecting device of the utility model;

[0012] Figure 3 It is the structure schematic view of the positioning device of the utility model;

[0013] Figure 4 It is the structure schematic view of the clamping device of the utility model.

[0014] In the drawing: 1, connecting device;2, positioning device;11, fixed disc;12, positioning pipe;13, guide mouth;14, communication pipe;15, support block;21, step motor;22, adjusting shaft;23, blind hole;24, sliding block;25, compression spring;26, sleeve joint block;27, star-shaped plate;28, clamping device;281, fixed block;282, limiting rod;283, sliding block;284, adjusting rod;285, threaded groove. DETAILED DESCRIPTION

[0015] The embodiments of the present application are given for illustrative and descriptive purposes only and are not intended to be exhaustive or to limit the present application to the forms disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. Embodiments were chosen and described in order to best explain the principles of the present application and its practical application, and to enable others skilled in the art to understand the present application for various embodiments with various modifications as are suited to the particular use contemplated.

[0016] Embodiments: Please refer to Figure 1 Figure 4 The utility model provides a technical scheme: a kind of multi-channel gas sample injection device, comprising: connecting device 1;Positioning device 2, the outer wall of positioning device 2 is rotationally connected with the outer wall of connecting device 1;Positioning device 2 includes stepper motor 21, the output end of stepper motor 21 is fixedly connected with adjusting shaft 22, adjusting shaft 22 inner wall is slidably connected with sliding block 24 by blind hole 23, and blind hole 23 is opened in the wall of adjusting shaft 22 top, the top end of sliding block 24 inside is fixedly connected with compression spring 25, the outer wall of sliding block 24 is fixedly connected with sleeve joint block 26, sleeve joint block 26 below is provided with star plate 27, the lateral wall of star plate 27 outside is fixedly connected with clamping device 28, the lateral wall of star plate 27 inside is fixedly connected with the outer wall of adjusting shaft 22, the bottom end of adjusting shaft 22 inner wall is fixedly connected with the end of compression spring 25 away from sliding block 24, when all sample injection needles are installed, user lifts fixed disc 11 while pressing sliding block 24 downwards, in the blind hole 23 of adjusting shaft 22, sliding block 24 slides in blind hole 23 under the action of compression spring 25, sleeve joint block 26 moves with sliding block 24, since sample injection needle push tube end head is in sleeve joint pipe, needle tube is fixed position by clamping device 28, so that the gas in sample injection needle is pushed out.

[0017] Connecting device 1 includes fixed disc 11, the lateral wall in fixed disc 11 is fixedly connected with positioning pipe 12, the inner wall of fixed disc 11 is fixedly connected with guide nozzle 13, the outer wall of the bottom of guide nozzle 13 is fixedly connected with communication pipe 14, the bottom of fixed disc 11 is fixedly connected with support block 15, the lateral wall in positioning pipe 12 is slidably connected with the outer wall of adjusting shaft 22, after the position of sample injection needle needle head is aligned with the position of guide nozzle 13, lift fixed disc 11, under the guidance of positioning pipe 12, the needle head of opposite sample injection needle enters guide nozzle 13, and communication pipe 14 uses common rubber pipe in prior art, so as to have the benefit that shape change does not affect function, cooperate with guide nozzle 13 to guide the flow of gas sample to enter chromatograph.

[0018] ​The clamping device 28 comprises a fixed block 281, the outer wall of the bottom of the fixed block 281 is fixedly connected with a limiting rod 282 in a symmetrical mode, the outer wall of the limiting rod 282 is slidably connected with a sliding block 283, the outer wall of the sliding block 283 is rotatably provided with an adjusting rod 284, the outer wall of the adjusting rod 284 is threadedly connected with the outer wall of the fixed block 281 through a threaded groove 285, the threaded groove 285 is formed in the outer wall of the adjusting rod 284, and the outer wall of the fixed block 281 is fixedly connected with the side wall outside the star-shaped plate 27. A worker controls the position of the sliding block 283 by rotating the adjusting rod 284, and the adjusting rod 284 drives the sliding block 283 to slide on the limiting rod 282 under the action of the threaded groove 285, so that the up-down position of the sampling needle is clamped, the clamping device 28 can firmly fix the sampling needle, and the adjustable sliding block 283 can also adapt to sampling needle heads of different lengths, thereby improving the applicability of the sampling device.

[0019] Working principle:

[0020] The fixed disc 11 in the connecting device 1 is stably supported on the chromatograph by the support block 15 when not in use, and the stepping motor 21 is fixed in position, the positioning tube 12 is rotatably connected with the adjusting shaft 22 in the positioning device 2, and plays a role in positioning the adjusting shaft 22. After the position of the sampling needle head is aligned with the position of the guide nozzle 13, the fixed disc 11 is lifted, and under the guiding action of the positioning tube 12, the opposite sampling needle head enters the guide nozzle 13, and the connecting pipe 14 uses a rubber pipe commonly used in the prior art, thereby having the advantage that the function is not affected when the shape is changed, and the guide nozzle 13 is used to guide the flow of the gas sample into the chromatograph;

[0021] The step motor 21 is arranged as a rotating power source, which has the advantages of accurate control of the rotating angle, accurate switching and positioning of the multi-channel gas sample, and the personnel can only be on one side of the machine when placing the sample needle, and the personnel can continue to place the sample needle after switching the angle by rotating the step motor 21 to drive the adjusting shaft 22, the star-shaped plate 27 and the clamping device 28, so as to adapt to the multi-channel design on the fixed disc 11, and when all the sample needles are installed, the user lifts the fixed disc 11 and presses the sliding block 24 downward, the sliding block 24 slides in the blind hole 23 in the adjusting shaft 22 under the action of the compression spring 25, the sleeve block 26 moves with the sliding block 24, the needle tube is fixed in position by the clamping device 28 because the sample needle pushes the pipe end in the sleeve pipe, and the internal gas of the sample needle is pushed out, the compression spring 25 is compressed at this time, and the sleeve block 26 is pressed to the sample needle, so that the needle nozzle enters the guide nozzle 13, and the internal gas of the sample needle enters the connecting pipe 14 through the guide nozzle 13, and the gas sampling is realized, the connecting device 1 ensures the stable flow of the gas sample, and the positioning device 2 enables the gas to enter in multiple channels, and the angle position is controllable, and the personnel injection is prevented to cause damage to the needle head.

[0022] The clamping device 28 on the star-shaped plate 27 is used for fixing the sample needle containing the gas sample, the fixed block 281 of the clamping device 28 is fixed on the star-shaped plate 27, the worker controls the position of the sliding block 283 by rotating the adjusting rod 284, the adjusting rod 284 drives the sliding block 283 to slide on the limiting rod 282 under the action of the threaded groove 285, so as to clamp the up-down position of the sample needle, so that the clamping device 28 can firmly fix the sample needle, and the adjustable sliding block 283 can also adapt to sample needles of different lengths, so as to improve the applicability of the sampling device, and the clamping device 28 prevents the sample needle from leaking due to loosening during the sampling process, so as to ensure the accuracy and stability of the sampling.

[0023] Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary skilled persons in the art and related fields without creative labor should belong to the protection scope of the utility model. The structures, devices and operation methods not specifically described and explained in the utility model are implemented according to the conventional means in the art, without special description and limitation.

Claims

1. A multi-channel gas sample inlet device, characterized by, Include: Connecting device (1); Positioning device (2), the outer wall of the positioning device (2) is rotatably connected with the outer wall of the connecting device (1); The positioning device (2) comprises a stepping motor (21), the output end of the stepping motor (21) is fixedly connected with an adjusting shaft (22), the inner wall of the adjusting shaft (22) is slidably connected with a sliding block (24) through a blind hole (23), and the blind hole (23) is arranged in the wall at the top of the adjusting shaft (22), the top of the inner part of the sliding block (24) is fixedly connected with a compression spring (25), the outer wall of the sliding block (24) is fixedly connected with a sleeve block (26), the lower portion of the sleeve block (26) is provided with a star-shaped plate (27), and the outer side wall of the star-shaped plate (27) is fixedly connected with a clamping device (28).

2. A multi-channel gas sample inlet device according to claim 1, characterized in that: The outer wall of the adjusting shaft (22) is fixedly connected with the inner side wall of the star-shaped plate (27), and the bottom end of the inner wall of the adjusting shaft (22) is fixedly connected with one end of the compression spring (25) away from the sliding block (24).

3. A multi-channel gas sample inlet device according to claim 1, wherein: The connecting device (1) comprises a fixed disc (11), the inner side wall of the fixed disc (11) is fixedly connected with a positioning pipe (12), the inner wall of the fixed disc (11) is fixedly connected with a guide nozzle (13), the outer wall of the bottom of the guide nozzle (13) is fixedly connected with a communication pipe (14), and the bottom of the fixed disc (11) is fixedly connected with a supporting block (15).

4. A multi-channel gas sample inlet device according to claim 3, wherein: The inner side wall of the positioning pipe (12) is slidably connected with the outer wall of the adjusting shaft (22).

5. The multi-channel gas sample inlet device of claim 1, wherein: The clamping device (28) comprises a fixed block (281), the outer wall of the bottom of the fixed block (281) is fixedly connected with a limiting rod (282), the outer wall of the limiting rod (282) is slidably connected with a sliding block (283), the outer wall of the sliding block (283) is rotatably provided with an adjusting rod (284), the outer wall of the adjusting rod (284) is threadedly connected with the outer wall of the fixed block (281) through a threaded groove (285), and the threaded groove (285) is arranged on the outer wall of the adjusting rod (284).

6. A multi-channel gas sample inlet device according to claim 5, wherein: The outer wall of the fixed block (281) is fixedly connected with the outer side wall of the star-shaped plate (27).

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