Gas sampling device

Abstract

The utility model relates to the technical field of gas transmission devices, and discloses a gas sample injection device which comprises a sample injection pipe, a retarding pipe is fixedly connected in the sample injection pipe, a connecting sleeve is mounted at one end of the sample injection pipe, a filter screen is mounted between an exhaust port and the connecting sleeve, and a gas outlet is formed in the connecting sleeve. A sample injection port is connected to the interior of the side face of the connecting sleeve in a threaded and sleeved mode, a spring and a one-way sealing valve are installed in the sample injection port, a side plate is installed outside the sample injection pipe and the sample injection port, and a threaded rod is installed in the side plate. According to the gas sample injection device, the retarding pipe is arranged in the sample injection pipe, and the gas inlet, the conveying pipe, the gas circulating pipe and the exhaust port which are mounted in the retarding pipe form a backflow space, so that when gas is conveyed, the passing gas can be subjected to retarding treatment, and the gas conveying speed is reduced, so that the speed is prevented from being too high; therefore, when the sample introduction gas moves to a detection area, the detection effect is influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of gas transmission devices, in particular to a gas sampling device. Background Art

[0002] During the gas detection process, the gas sample needs to be transported to the inside of the pipeline, and at the same time, the pipeline is used to drive the gas to the inside of the gas generator and other detection devices. In order to facilitate the gas transportation, an injection device has been developed. The injection device effectively drives the gas to be transported and collected.

[0003] Among the publicly authorized patents, the Chinese patent with the patent number "CN201810455820.8" discloses a sampling device and sampling method for gas detection; the first sampling tube is provided with the first pulse valve, and the second sampling tube is provided with the second pulse valve. The gas sample to be detected enters the first sampling tube, passes through the first pulse valve, and enters the sample pretreatment chamber for pretreatment. The pretreated sample then enters the second sampling tube, passes through the second pulse valve, and is output to the detection instrument connected to the second sampling tube. The present invention can realize quantitative sampling and non-quantitative sampling, continuous sampling and non-continuous sampling, eliminate background interference, improve detection sensitivity, reduce detection limit, and shorten response time.

[0004] When pushing the gas injection, the sample pipe is pressed to form a negative pressure inside the sample pipe. The gas in the negative pressure state can be transported to the inside of the detection device along the pipe. However, when controlling the gas injection, if the pressure is too high, the gas flow rate will be too fast, and the gas flow rate will cause gas leakage. At the same time, gas leakage will affect the injection and detection effects. For this reason, we have developed a gas injection device. Utility Model Content

[0005] In response to the shortcomings of existing gas sampling devices, the utility model provides a gas sampling device, which has a deceleration tube arranged inside the sampling tube. The air inlet, delivery pipe, gas flow pipe and exhaust port opened inside the deceleration tube can decelerate the passing gas, thereby reducing the gas output speed, thereby solving the problems raised in the above-mentioned background technology.

[0006] The utility model provides the following technical solution: a gas sampling device, comprising an injection tube, the interior of the injection tube is fixedly connected to a deceleration tube, one end of the injection tube is installed with a connecting sleeve, a filter is installed between the exhaust port and the connecting sleeve, the internal threaded sleeve on the side of the connecting sleeve is connected to an injection port, a spring and a one-way sealing valve are installed inside the injection port, the outside of the injection tube and the injection port are installed with a side plate, the inside of the side plate is installed with a threaded rod, the outside of the deceleration tube is provided with an air inlet, the inside of the deceleration tube is provided with a delivery pipe, one end of the deceleration tube is fixedly connected to a gas circulation tube, the side of the deceleration tube is provided with an exhaust port, the outside of the deceleration tube is fixedly connected to a sealing plate, a sealing splicing baffle is installed on the side of the sealing plate, the other side of the sealing splicing baffle is fixedly connected to a spiral rod, the other end of the spiral rod is fixedly connected to a sealing terminal, the other side of the sealing terminal is fixedly connected to a push rod, and the other side of the deceleration tube is fixedly connected to a sealing column.

[0007] Preferably, the gas circulation pipe is connected between the air inlet and the delivery pipe, and the exhaust port is located in the middle of one side of the retarder pipe.

[0008] Preferably, the filter screen is installed between the connecting sleeve and the deceleration pipe, and the filter screen is arranged at one end of the deceleration pipe.

[0009] Preferably, the spring and the one-way sealing valve are arranged inside the injection port, and the other end of the injection port is installed inside the device to be injected.

[0010] Preferably, three groups of side plates are installed at equal intervals outside the injection tube and the injection port, the threaded rod passes through the interior of one end of the side plate, and a nut is installed at the other end of the threaded rod.

[0011] Preferably, a sealing pin is installed at one end of the sealing splicing baffle, and the sealing pin is movably sleeved inside the sealing plate. The spiral rod is spiral-shaped, and the outside of the sealing terminal is attached to the inner wall of the sample injection tube.

[0012] Preferably, a hole is opened inside the push rod, the other end of the push rod is installed inside the gas injection device, and the other end of the sealing column extends to the inside of the push rod.

[0013] Compared with the existing gas sampling device, the utility model has the following beneficial effects:

[0014] 1. The gas sampling device is arranged inside the sampling tube through a deceleration tube, and the air inlet, delivery tube, gas flow tube and exhaust port installed inside the deceleration tube form a reflux space. Then, when the gas is delivered, the passing gas can be decelerated. By reducing the gas delivery speed, it is avoided that the speed is too high, which causes the sampling gas to move to the detection area and affect the detection effect.

[0015] 2. The gas sampling device can drive the sealing splicing baffle to deviate from the inside of the sealing plate by pulling the push rod backward, and at the same time, push the push rod again to drive gas delivery, that is, to avoid the gas accumulated inside the sealing plate and the sealing terminal directly touching the push rod, causing gas leakage when the push rod moves inward. At the same time, a groove is opened inside the push rod, and the groove and the sealing column are connected with each other, that is, after the gas is delivered, the gas can be quickly driven to be delivered to the inside of the sampling tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the cross-sectional structure of the main body of the utility model;

[0018] Figure 3 This is a partially enlarged structural diagram of the gas retarding structure of the utility model;

[0019] Figure 4 This is an enlarged structural diagram of point A of the utility model;

[0020] Figure 5 This is an enlarged structural diagram of point B of the present invention.

[0021] In the figure: 1. Injection tube; 2. Retarder tube; 3. Air inlet; 4. Delivery tube; 5. Gas flow tube; 6. Exhaust port; 7. Connecting sleeve; 8. Injection port; 9. Spring; 10. One-way sealing valve; 11. Side plate; 12. Threaded rod; 13. Sealing plate; 14. Sealing splicing baffle; 15. Screw rod; 16. Sealing terminal; 17. Push rod; 18. Sealing column; 19. Filter. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] See also Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5, a gas sampling device, including a sampling tube 1, the interior of the sampling tube 1 is fixedly connected with a retarding tube 2, the retarding tube 2 drives the passing gas to undergo retarding treatment, a connecting sleeve 7 is installed at one end of the sampling tube 1, a filter screen 19 is installed between the exhaust port 6 and the connecting sleeve 7, the filter screen 19 drives the gas to filter and reduce the transportation of impurities, the internal threaded sleeve on the side of the connecting sleeve 7 is connected with an injection port 8, the interior of the injection port 8 is installed with a spring 9 and a one-way sealing valve 10, the spring 9 and the one-way sealing valve 10 drive the internal transportation of gas in the injection port 8 to prevent backflow, the outside of the sampling tube 1 and the injection port 8 is installed with a side plate 11, the inside of the side plate 11 is installed with a threaded rod 12, the threaded rod 12 drives the position between the sampling tube 1 and the injection port 8 to be spliced ​​and limited, and an air inlet is provided on the outside of the retarding tube 2 The air inlet 3, the air delivery pipe 4 is provided inside the deceleration tube 2, one end of the deceleration tube 2 is fixedly connected to the gas circulation pipe 5, the side of the deceleration tube 2 is provided with an exhaust port 6, the air inlet 3, the air delivery pipe 4, the gas circulation pipe 5 and the exhaust port 6 drive the gas to be transported, the outside of the deceleration tube 2 is fixedly connected to a sealing plate 13, the side of the sealing plate 13 is installed with a sealing splicing baffle 14, the sealing plate 13 and the sealing splicing baffle 14 are spliced ​​with each other to avoid touching each other and causing gas leakage, the other side of the sealing splicing baffle 14 is fixedly connected to a spiral rod 15, the other end of the spiral rod 15 is fixedly connected to a sealing terminal 16, the sealing terminal 16 drives the inside of the sampling tube 1 to be sealed, the other side of the sealing terminal 16 is fixedly connected to a push rod 17, and the other side of the deceleration tube 2 is fixedly connected to a sealing column 18.

[0024] See also Figure 5 The gas circulation tube 5 is connected between the air inlet 3 and the delivery tube 4, and the exhaust port 6 is located in the middle of one side of the retarder tube 2. It is installed between the air inlet 3 and the delivery tube 4 through the gas circulation tube 5, that is, the gas passes through the air inlet 3, the delivery tube 4, and the gas circulation tube 5 inside the sampling tube 1 and is discharged again through the exhaust port 6. That is, when the gas is transmitted, the gas forms a reflux space inside the retarder tube 2 to avoid the problem of excessive gas flow rate during the gas sampling and delivery process, which affects the gas sampling efficiency.

[0025] See also Figure 4 The filter 19 is installed between the connecting sleeve 7 and the deceleration tube 2. The filter 19 is set at one end of the deceleration tube 2. The filter 19 is installed between the connecting sleeve 7 and the deceleration tube 2 through the filter 19. At the same time, the gas circulation tube 5 drives the gas to be transported. The gas passing through the filter 19 can be filtered to increase the cleanliness of the gas during transportation.

[0026] See also Figure 4The spring 9 and the one-way sealing valve 10 are arranged inside the injection port 8, and the other end of the injection port 8 is installed inside the device to be injected. The spring 9 and the one-way sealing valve 10 are installed inside the injection port 8. The spring 9 and the one-way sealing valve 10 can avoid the problem of backflow of the transported gas.

[0027] See also Figure 4 Three groups of side plates 11 are installed at equal intervals outside the sampling tube 1 and the sampling port 8. The threaded rod 12 passes through the interior of one end of the side plate 11. A nut is installed on the other end of the threaded rod 12. It is installed on the outside of the sampling tube 1 and the sampling port 8 through the side plate 11. At the same time, the nut installed on the outside of the threaded rod 12 is rotated. The nut controls the inward contraction between the side plates 11, thereby controlling the stability of the position between the sampling tube 1 and the sampling port 8 during splicing.

[0028] See also Figure 5 A sealing pin is installed at one end of the sealing splicing baffle 14, and the sealing pin is movably sleeved on the inside of the sealing plate 13. The spiral rod 15 is spiral, and the outside of the sealing terminal 16 is fitted on the inner wall of the sampling tube 1, and one end of the sealing splicing baffle 14 is installed on the inside of the sealing plate 13, that is, the sealing plate 13, the sampling tube 1 and the retarder 2 are directly in a sealed state. When it is necessary to control the gas delivery, the sealing terminal 16 is pulled toward the rear end, and the sealing splicing baffle 14 is rotated at the same time. Under the action of the twisting force of the spiral rod 15, the angle is deflected, and an opening is formed inside the sealing plate 13, and the sealing terminal 16 is pushed to move toward the inside of the sampling tube 1, that is, a negative pressure is formed inside the sampling tube 1, and the gas can be sampled at the same time.

[0029] See also Figure 2 A hole is provided inside the push rod 17, and the other end of the push rod 17 is installed inside the gas injection device. The other end of the sealing column 18 extends to the inside of the push rod 17, and one end of the sealing column 18 extends to the inside of the push rod 17. When the pushed gas is discharged from the inside of the sampling tube 1, the sealing inside the push rod 17 is increased, and the gas is sampled and discharged from one end of the sampling tube 1. At the same time, when the control gas is delivered to the inside of the sampling tube 1, the sealing column 18 is pulled toward the rear end, and an opening is formed between the sealing column 18 and the inside of the sampling tube 1, and the opening can drive the gas to be delivered.

[0030] Working principle: When in use, the gas to be sampled is delivered to the inside of the sampling tube 1, and the sampling port 8 is set inside the device to be transported. At the same time, the push rod 17 is pushed inward, and the sealing column 18 passes through the inside of the push rod 17. At the same time, a negative pressure is formed inside the sampling tube 1, and the gas can be discharged through the inside of the retarder 2 and the inside of the sampling port 8, thereby increasing the convenience of gas delivery. At the same time, the push rod 17 is pulled backward, and the spring 9 performs a one-way seal on the inside of the sampling port 8. At the same time, the sealing column 18 offsets the inside of the push rod 17. At the same time, the inside of the sampling tube 1 is in a negative pressure state, and the gas is driven again for collection through one end of the push rod 17.

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

Claims

1. A gas sampling device, comprising a sampling tube (1), wherein the interior of the sampling tube (1) is fixedly connected to a retarding tube (2), an exhaust port (6) is provided on the side of the retarding tube (2), a connecting sleeve (7) is installed at one end of the sampling tube (1), a filter screen (19) is installed between the exhaust port (6) and the connecting sleeve (7), an internal threaded sleeve of the side of the connecting sleeve (7) is connected to an injection port (8), a spring (9) and a one-way sealing valve (10) are installed inside the injection port (8), a side plate (11) is installed outside the sampling tube (1) and the sampling port (8), and a threaded rod (12) is installed inside the side plate (11), characterized in that: The deceleration tube (2) is provided with an air inlet (3) on the outside, and a delivery tube (4) is provided on the inside of the deceleration tube (2). One end of the deceleration tube (2) is fixedly connected to a gas circulation tube (5). The outside of the deceleration tube (2) is fixedly connected to a sealing plate (13). A sealing splicing baffle (14) is installed on the side of the sealing plate (13). The other side of the sealing splicing baffle (14) is fixedly connected to a spiral rod (15). The other end of the spiral rod (15) is fixedly connected to a sealing terminal (16). The other side of the sealing terminal (16) is fixedly connected to a push rod (17). The other side of the deceleration tube (2) is fixedly connected to a sealing column (18).

2. A gas sampling device according to claim 1, characterized in that: The gas circulation pipe (5) is connected between the air inlet (3) and the delivery pipe (4), and the exhaust port (6) is located in the middle of one side of the retarder (2).

3. A gas sampling device according to claim 1, characterized in that: The filter screen (19) is installed between the connecting sleeve (7) and the deceleration pipe (2), and the filter screen (19) is arranged at one end of the deceleration pipe (2).

4. A gas sampling device according to claim 1, characterized in that: The spring (9) and the one-way sealing valve (10) are arranged inside the injection port (8), and the other end of the injection port (8) is installed inside the device to be injected.

5. A gas sampling device according to claim 1, characterized in that: The side plate (11) is provided with three groups of equidistantly mounted outside the injection tube (1) and the injection port (8), the threaded rod (12) passes through the interior of one end of the side plate (11), and a nut is mounted on the other end of the threaded rod (12).

6. A gas sampling device according to claim 1, characterized in that: A sealing pin is installed at one end of the sealing splicing baffle (14), and the sealing pin is movably sleeved inside the sealing plate (13). The spiral rod (15) is spiral-shaped, and the outside of the sealing terminal (16) is attached to the inner wall of the sample injection tube (1).

7. A gas sampling device according to claim 1, characterized in that: A hole is provided inside the push rod (17), the other end of the push rod (17) is installed inside the gas injection device, and the other end of the sealing column (18) extends to the inside of the push rod (17).

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