Online sampling and detecting device for waste gas

Abstract

The utility model discloses a waste gas on-line sampling detection device which comprises a connecting block, a waste gas detection sensor, a plug block and a telescopic driving mechanism, a cavity is transversely formed in the connecting block, a guide hole which extends downwards and is communicated with the cavity is formed in the top of the connecting block, the plug block is arranged in the guide hole, and the telescopic driving mechanism is arranged in the cavity. A cover plate is arranged at the top of the guide hole, the telescopic driving mechanism is arranged on the cover plate and connected with the plug block to drive the plug block to move up and down, a through hole is transversely formed in the plug block, and the waste gas detection sensor is arranged in the through hole. According to the waste gas online sampling and detecting device, when the plug block enters the cavity, waste gas passing through the cavity is sampled through the through hole, then the plug block ascends to enter the guide hole, and volatile organic compounds in the waste gas are detected through the waste gas detection sensor, so that the automation level and the detection working efficiency are improved; the problem that the waste gas detection sensor is polluted and the maintenance workload are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical production, in particular to an online waste gas sampling and detection device. Background Art

[0002] In the process of some chemical production, some waste gas will inevitably be generated, such as waste gas containing volatile organic compounds. In order to prevent the waste gas from polluting the surrounding air, the waste gas needs to be tested and treated, and can only be discharged after passing the test.

[0003] Exhaust gas detection is divided into two types: real-time detection and sampling detection. Real-time detection requires the sensor to be in real-time contact with the exhaust gas. The sensor is easily covered by pollutants, which reduces the detection accuracy and requires frequent maintenance, increasing the maintenance workload. Moreover, the sensor is always working, which has a certain impact on stability and service life. Sampling detection requires separate sampling of exhaust gas, which is cumbersome to operate and there is a problem of air leakage during the sampling process, which needs to be improved. Utility Model Content

[0004] The utility model aims to provide an online exhaust gas sampling and detection device to perform online exhaust gas sampling and automatic detection, thereby improving the convenience of detection operation and maintenance.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] An online exhaust gas sampling and detection device comprises: a connecting block, an exhaust gas detection sensor, a plug block and a telescopic drive mechanism, wherein a cavity is transversely arranged in the connecting block, a guide hole extending downward and communicating with the cavity is arranged on the top of the connecting block, the plug block is arranged in the guide hole, a cover plate is arranged on the top of the guide hole, the telescopic drive mechanism is arranged on the cover plate and connected to the plug block to drive the plug block to move up and down, a through hole is transversely arranged in the plug block, and the exhaust gas detection sensor is arranged in the through hole.

[0007] Wherein, the telescopic drive mechanism adopts an electric telescopic rod or a cylinder.

[0008] Wherein, the cover plate is provided with threading holes.

[0009] Wherein, the plug block is provided with sealing rings located above and below the through hole.

[0010] Wherein, a ring groove corresponding to the sealing ring is concavely arranged on the plug block.

[0011] Wherein, the plug adopts a cylindrical structure.

[0012] Wherein, both ends of the plug block are provided with pipe joints communicating with the cavity.

[0013] The beneficial effects of the utility model include: an online exhaust gas sampling and detection device, in which the connecting block can be connected in series to the exhaust gas pipe through a pipe joint, the construction is convenient, the plug block can be intermittently extended and retracted, and when the plug block enters the cavity, the through hole is used to sample the exhaust gas passing through the cavity, and then the exhaust gas detection sensor is used to detect volatile organic compounds in the exhaust gas after rising into the guide hole, thereby improving the automation level and detection work efficiency, and the exhaust gas detection sensor can be stored in the guide hole with the plug block, reducing the problem of exhaust gas detection sensor being contaminated and the maintenance workload, which is beneficial to improving the working stability of the exhaust gas detection sensor and extending its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model;

[0015] Figure 2 yes Figure 1 Schematic diagram of the structure after the middle plug is moved up. DETAILED DESCRIPTION

[0016] Combine the following Figure 1~Figure 2 The technical solution of the utility model is further illustrated by specific embodiments.

[0017] like Figure 1 The exhaust gas online sampling and detection device shown includes: a connecting block 1, an exhaust gas detection sensor 8, a plug block 4 and a telescopic drive mechanism 3. A cavity 6 is horizontally arranged in the connecting block 1, and pipe joints 2 connected to the cavity 6 are arranged at both ends of the plug block 4. The pipe joints 2 can adopt a flange structure, so that the connecting block 1 can be connected in series to the exhaust gas pipeline through the pipe joints 2, which is convenient for construction and allows the exhaust gas to pass through the cavity 6, facilitating online sampling and detection.

[0018] A guide hole 10 extending downward and communicating with the cavity 6 is arranged on the top of the connecting block 1, and a cover plate 7 is arranged on the top of the guiding hole 10. The cover plate 7 can be fixed on the top of the connecting block 1 by screws, so that the structure is stable and the disassembly and assembly are convenient.

[0019] The plug block 4 is arranged in the guide hole 10. In this embodiment, the plug block 4 is a cylindrical structure, and the guide hole 10 is used to guide the lifting of the plug block 4. Figure 1 As shown, the telescopic drive mechanism 3 is arranged on the cover plate 7 and connected to the block 4 to drive the block 4 to move up and down. In this embodiment, the telescopic drive mechanism 3 adopts an electric telescopic rod or a cylinder, and the intermittent telescopic control of the telescopic drive mechanism 3 can be performed through PLC to improve the automation level.

[0020] A through hole 9 is transversely arranged in the plug 4, and the exhaust gas passing through the cavity 6 is sampled by using the through hole 9 when the plug 4 enters the cavity 6. In order to avoid leakage, a sealing ring 5 is arranged on the plug 4 above and below the through hole 9. In this embodiment, a ring groove corresponding to the sealing ring 5 is arranged inwardly on the plug 4 to position the sealing ring 5, and the sealing ring 5 can prevent the exhaust gas in the cavity 6 from entering the guide hole 10.

[0021] The exhaust gas detection sensor 8 is arranged in the through hole 9, as shown in FIG. Figure 2 As shown, after the plug 4 rises and enters the guide hole 10, the exhaust gas detection sensor 8 is used to detect volatile organic compounds in the exhaust gas, thereby improving the automation level and detection efficiency. Moreover, after the plug 4 enters the guide hole 10, it does not affect the normal passage of the exhaust gas, thereby reducing wind resistance.

[0022] In addition, a threading hole 11 is provided on the cover plate 4, which facilitates the connection between the signal line and the exhaust gas detection sensor 8. The signal of the exhaust gas detection sensor 8 is transmitted to the industrial computer through the signal line to display and store the data, which is conducive to further processing or discharge of the exhaust gas.

[0023] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The contents of this specification should not be understood as limiting the present invention.

Claims

1. An exhaust gas online sampling and detection device, characterized in that: include: A connecting block, an exhaust gas detection sensor, a plug block and a telescopic driving mechanism, wherein a cavity is transversely arranged in the connecting block, a guide hole extending downward and communicating with the cavity is arranged on the top of the connecting block, the plug block is arranged in the guide hole, a cover plate is arranged on the top of the guide hole, the telescopic driving mechanism is arranged on the cover plate and connected to the plug block to drive the plug block to move up and down, a through hole is transversely arranged in the plug block, and the exhaust gas detection sensor is arranged in the through hole.

2. The exhaust gas online sampling and detection device according to claim 1 is characterized in that: The telescopic driving mechanism adopts an electric telescopic rod or a cylinder.

3. The exhaust gas online sampling and detection device according to claim 1 is characterized in that: The cover plate is provided with threading holes.

4. The exhaust gas online sampling and detection device according to claim 1, characterized in that: The plug block is provided with sealing rings located above and below the through hole.

5. The exhaust gas online sampling and detection device according to claim 4 is characterized in that: The plug block is concavely provided with an annular groove corresponding to the sealing ring.

6. The exhaust gas online sampling and detection device according to claim 1, characterized in that: The plug block adopts a cylindrical structure.

7. The exhaust gas online sampling and detection device according to claim 1, characterized in that: Both ends of the plug block are provided with pipe joints communicating with the cavity.

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