An industrial waste gas detection device based on gas chromatography

Abstract

The utility model relates to waste gas detection technical field discloses an industrial waste gas detection device based on gas chromatogram, including gas chromatograph and control end, the side away from screw interface of gas chromatograph installs a plurality of screw interfaces, and detachable installation has double -passage air inlet component on the screw interface for the air inlet, and the top of gas chromatograph and the side close to screw interface install the bag pressing assembly for pressing bag. The industrial waste gas detection device based on gas chromatogram, through being provided with two air inlet ports can simultaneously connect waste gas and preset gas source, do not need to carry out the dismounting replacement each time, reduce the arrangement of gas detection, improve gas detection efficiency, and, the setting of two check valves, avoid the gas source of both to enter the storage cavity of opposite party, guarantee that gas source can go out through internal thread connecting pipe.

Description

Technical Field

[0001] This utility model relates to the field of waste gas detection technology, and in particular to an industrial waste gas detection device based on gas chromatography. Background Technology

[0002] In the field of industrial waste gas detection, gas chromatographs are widely used due to their high-precision separation and quantitative analysis capabilities. In existing technologies, gas chromatography-based detection devices are typically connected to an external gas source (such as a carrier gas cylinder) via pipelines to maintain a stable gas flow.

[0003] When testing externally collected exhaust gas samples, the operating procedure is as follows: First, collect the exhaust gas into a storage bag. Then, completely disassemble the original gas source pipeline of the gas chromatograph and connect the storage bag interface to the gas inlet of the chromatograph before testing can be performed. Each test requires manual installation and disassembly of the pipeline, which increases the preparation time before testing and the recovery time after testing. The time-consuming operation reduces the overall testing efficiency, especially in the case of large-volume or frequent testing. Furthermore, frequent threaded connection and disassembly can easily lead to mechanical wear of the interface, which will reduce the sealing performance and increase the risk of gas leakage in the long run. Repeated disassembly and assembly of the interface can easily lead to a decrease in sealing performance, affecting the accuracy of the test results and the stability of the instrument. Utility Model Content

[0004] In view of the problem that the existing methods require manual installation and disassembly of pipelines for each test, which increases the preparation time before the test and the recovery time after the test, and reduces the overall testing efficiency due to the time-consuming operation, this utility model is proposed.

[0005] Therefore, the purpose of this utility model is to provide an industrial waste gas detection device based on gas chromatography, which aims to allow for direct connection to the detection system for each test, thus avoiding a decrease in sealing performance due to the need for disassembly.

[0006] To solve the above technical problems, the present invention provides the following technical solution: an industrial waste gas detection device based on gas chromatography, including a gas chromatograph and a control terminal, wherein multiple threaded interfaces are installed on the side of the gas chromatograph away from the threaded interface, and a dual-channel air intake assembly is detachably installed on the threaded interface for air intake, and a bag-pressing assembly for pressing bags is installed on the top of the gas chromatograph and on the side near the threaded interface. The dual-channel air intake assembly includes a vertical pipe, with one-way valves installed at both ends of the vertical pipe. An L-shaped pipe is installed at the opposite ends of the two one-way valves, and the outer wall surface of the L-shaped pipe away from the one-way valve is provided with external threads.

[0007] As an improved technical solution, a connecting hole is provided in the middle of one side of the periphery of the vertical pipe, and an internally threaded connecting pipe that is threaded to the threaded interface is welded to the position of the vertical pipe opposite to the connecting hole.

[0008] As an improved technical solution, the bag-pressing assembly includes a vertical chamber fixed on a gas chromatograph, a vertical drive assembly installed inside the vertical chamber, a linkage plate installed at the movable end of the vertical drive assembly, a lifting channel for the linkage plate to be raised and lowered on the side of the vertical chamber near the linkage plate, and a bag-pressing plate welded to the side of the linkage plate away from the vertical chamber.

[0009] As an improved technical solution, the bag-pressing assembly also includes four optical rods fixed to the top of the gas chromatograph, and the optical rods are located between the dual-channel air inlet assembly and the vertical chamber, with a bag-limiting cavity forming between the four optical rods to limit the air bag.

[0010] As an improved technical solution, auxiliary strips are fixed to both ends of the bag pressing plate, and sliding holes for the light rod to pass through are opened at both ends of the auxiliary strips.

[0011] As an improved technical solution, the vertical drive assembly includes a servo motor installed inside the vertical compartment. A lead screw is installed at the drive end of the servo motor, and a lifting bar is threaded onto the servo motor. Sliding holes are provided at both ends of the lifting bar, and a guide rod is slidably installed on the lifting bar through the sliding holes.

[0012] After adopting the above technical solution, the beneficial effects of this utility model are: 1. This utility model has two air inlet ports that can simultaneously connect to exhaust gas and preset gas sources, eliminating the need for each installation and replacement, reducing the arrangement of gas detection, improving gas detection efficiency, and the setting of two one-way valves prevents the gas sources from entering each other's storage chambers, ensuring that the gas sources can be discharged outward through the internal threaded connecting pipe.

[0013] 2. In this utility model, the vertical drive assembly drives the pressure plate to move downward to press down the gas bag, which helps to make the gas inside the gas bag discharge outward at a uniform speed, controls the flow rate of the waste gas, and makes it enter the interior of the gas chromatograph at a uniform speed and in a uniform amount, which helps to improve the detection effect of waste gas. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them: Figure 1 This is a schematic diagram of the overall structure of an industrial waste gas detection device based on gas chromatography according to this utility model.

[0015] Figure 2This is a schematic diagram of the dual-channel air inlet assembly of an industrial waste gas detection device based on gas chromatography, according to this utility model.

[0016] Figure 3 This is a schematic diagram of the bag-pressing assembly of an industrial waste gas detection device based on gas chromatography according to this utility model.

[0017] Figure 4 This is a schematic diagram of the internal structure of the vertical chamber of an industrial waste gas detection device based on gas chromatography according to this utility model.

[0018] Explanation of reference numerals in the attached figures: 1. Gas chromatograph; 2. Control terminal; 3. Threaded interface; 4. Dual-channel air inlet assembly; 41. Vertical pipe; 42. Internally threaded connecting pipe; 43. One-way valve; 44. L-shaped pipe; 45. External thread; 5. Bag pressing assembly; 6. Vertical compartment; 7. Vertical drive assembly; 71. Servo motor; 72. Guide rod; 73. Lead screw; 74. Lifting bar; 8. Lifting channel; 9. Linkage bar; 10. Bag pressing plate; 11. Auxiliary bar; 12. Smooth rod. Detailed Implementation

[0019] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0020] Example 1 Reference Figures 1-4 This is the first embodiment of the present invention, which provides an industrial waste gas detection device based on gas chromatography. This industrial waste gas detection device based on gas chromatography includes a gas chromatograph 1 and a control terminal 2. Multiple threaded interfaces 3 are installed on the side of the gas chromatograph 1 away from the threaded interface 3, and a dual-channel air intake assembly 4 is detachably installed on the threaded interface 3 for air intake. A bag pressing assembly 5 for bag pressing is installed on the top of the gas chromatograph 1 and on the side close to the threaded interface 3. The dual-channel air intake assembly 4 includes a vertical pipe 41, with one-way valves 43 installed at both ends of the vertical pipe 41. L-shaped pipes 44 are installed at the opposite ends of the two one-way valves 43. The outer wall surface of the L-shaped pipe 44 away from the one-way valve 43 is provided with external threads 45.

[0021] A connecting hole is provided in the middle of one side of the periphery of the vertical tube 41, and an internally threaded connecting tube 42 that is threaded to the threaded interface 3 is welded to the position of the vertical tube 41 directly opposite the connecting hole.

[0022] The bag-pressing assembly 5 includes a vertical chamber 6 fixed on the gas chromatograph 1. A vertical drive assembly 7 is installed inside the vertical chamber 6. A linkage plate 9 is installed on the movable end of the vertical drive assembly 7. A lifting channel 8 for the linkage plate 9 to be raised and lowered is opened on the side of the vertical chamber 6 near the linkage plate 9. A bag-pressing plate 10 is welded on the side of the linkage plate 9 away from the vertical chamber 6.

[0023] During use, the two air inlet ports can be connected to exhaust gas and preset air source simultaneously, eliminating the need for disassembly and replacement each time. This reduces the need for gas detection setup and improves gas detection efficiency. Furthermore, the two one-way valves 43 prevent the air source from entering the other's storage chamber, ensuring that the air source can be discharged outward through the internal threaded connecting pipe 42.

[0024] Example 2 Reference Figure 1 , Figures 3-4 This is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that the pressure bag assembly 5 also includes four optical rods 12 fixed on the top of the gas chromatograph 1. The optical rods 12 are located between the dual-channel air inlet assembly 4 and the vertical chamber 6. A limiting cavity for limiting the gas bag is formed between the four optical rods 12. The limiting cavity can limit the position of the gas bag to a certain extent, which helps to limit the gas bag from slipping when it is pressed and released by the pressure bag assembly 5, and ensures the stability of the gas bag release.

[0025] Auxiliary strips 11 are fixed to both ends of the bag pressing plate 10, and sliding holes for the light rod 12 to pass through are opened at both ends of the auxiliary strips 11.

[0026] The vertical drive assembly 7 includes a servo motor 71 installed inside the vertical compartment 6. A lead screw 73 is installed on the drive end of the servo motor 71. A lifting bar 74 is threaded onto the servo motor 71. A threaded hole is opened in the middle of the lifting bar 74, which is threaded to the lead screw 73. A linkage plate 9 is fixed on the side of the lifting bar 74 near the lifting channel 8. Sliding holes are opened at both ends of the lifting bar 74. A guide rod 72 is slidably installed on the lifting bar 74 through the sliding holes, and the guide rod 72 is fixed inside the vertical compartment 6.

[0027] During use, the vertical drive assembly 7 drives the pressure plate 10 to move downwards and press down on the gas bag, which helps to make the gas inside the gas bag discharge outwards at a uniform speed, controls the flow rate of the exhaust gas, and makes it enter the interior of the gas chromatograph 1 at a uniform speed and in a uniform amount, which helps to improve the detection effect of exhaust gas.

[0028] The remaining structure is the same as that in Example 1.

[0029] Based on embodiments 1-2, the working principle of this utility model is as follows: After gas collection is completed, the gas bag is placed in the bag-limiting cavity formed between the four light rods 12; Connect the threaded interface on the gas bag to the upper external thread 45, connect the gas bag to the threaded interface 3, and connect the preset gas source to the lower external thread 45. Servo motor 71 drives lifting bar 74 to rotate. Under the longitudinal thread transmission between lifting bar 74 and threaded hole on lead screw 73, lifting bar 74 can be driven to move up and down. Pressure plate 10 moves up and down with lifting bar 74 through linkage plate 9. When pressure plate 10 moves down, it will press on the upper part of gas bag, squeeze the gas inside gas bag and transport it into the interior of dual-channel gas inlet assembly 4, and finally enter the interior of gas chromatograph 1 for detection.

[0030] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An industrial waste gas detection device based on gas chromatography, comprising a gas chromatograph (1) and a control terminal (2), characterized in that: The gas chromatograph (1) has multiple threaded interfaces (3) installed on the side away from the threaded interface (3), and a dual-channel air intake assembly (4) is detachably installed on the threaded interface (3) for air intake. A bag-pressing assembly (5) for pressing bags is installed on the top of the gas chromatograph (1) and on the side near the threaded interface (3). The dual-channel air intake assembly (4) includes a vertical pipe (41), both ends of which are equipped with one-way valves (43). L-shaped pipes (44) are installed at opposite ends of the two one-way valves (43). The outer wall surface of the L-shaped pipe (44) away from the one-way valve (43) is provided with external threads (45).

2. The industrial waste gas detection device based on gas chromatography according to claim 1, characterized in that: A connecting hole is provided in the middle of one side of the periphery of the vertical tube (41), and an internal threaded connecting tube (42) that is threaded to the threaded interface (3) is welded to the position of the vertical tube (41) directly opposite the connecting hole.

3. The industrial waste gas detection device based on gas chromatography according to claim 2, characterized in that: The bag-pressing assembly (5) includes a vertical compartment (6) fixed on a gas chromatograph (1). A vertical drive assembly (7) is installed inside the vertical compartment (6). A linkage plate (9) is installed on the movable end of the vertical drive assembly (7). A lifting channel (8) for the linkage plate (9) to be raised and lowered is opened on the side of the vertical compartment (6) near the linkage plate (9). A bag-pressing plate (10) is welded on the side of the linkage plate (9) away from the vertical compartment (6).

4. The industrial waste gas detection device based on gas chromatography according to claim 3, characterized in that: The bag-pressing assembly (5) also includes four light rods (12) fixed on the top of the gas chromatograph (1), and the light rods (12) are located between the dual-channel air inlet assembly (4) and the vertical chamber (6), and a bag-limiting cavity with a defined air bag is formed between the four light rods (12).

5. The industrial waste gas detection device based on gas chromatography according to claim 4, characterized in that: The two ends of the pressure plate (10) are fixed with auxiliary strips (11), and the two ends of the auxiliary strips (11) are provided with sliding holes for the light rod (12) to pass through.

6. The industrial waste gas detection device based on gas chromatography according to claim 5, characterized in that: The vertical drive assembly (7) includes a servo motor (71) installed inside the vertical compartment (6). A lead screw (73) is installed on the drive end of the servo motor (71). A lifting bar (74) is threaded onto the servo motor (71). Sliding holes are provided at both ends of the lifting bar (74). A guide rod (72) is slidably installed on the lifting bar (74) through the sliding holes.

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