A sealing device for a stationary pollution source exhaust gas sampling port

Abstract

The utility model discloses a fixed pollution source waste gas sampling port sealing device, including waste gas sampling gun, the fixed connection of the outer wall of the sampling pipe department of waste gas sampling gun has the threaded sleeve pole, the outer wall of threaded sleeve pole has seted up the thread, the outer wall threaded connection of threaded sleeve pole has the threaded sleeve piece, and the one side of inflatable ring is attached with the annular protruding department of threaded sleeve piece, the other side of inflatable ring is provided with the trachea, and the inner bag of trachea and inflatable ring are linked together. The device is applied to the sampling link of waste gas sampling gun, when the barrel department of waste gas sampling gun is inserted into the fixed pollution source pipeline, through the trachea of inflatable equipment connection inflatable ring one end, the input air of it makes it expand, seals the pipeline mouth, avoids the outside air and will flow into the pipeline through the gap reversely, improves the sealing effect is strong, avoids and will cause the discharge concentration calculation because of oxygen content conversion error, makes the actual emission of pollutant be underestimated, ensures the real and reliable of waste gas sampling data.

Description

Technical Field

[0001] This utility model relates to the field of exhaust gas sampling gun technology, specifically to a sealing device for an exhaust gas sampling port of a fixed pollution source. Background Technology

[0002] Increased emissions of industrial waste gases (such as SO2, NOx, VOCs, and particulate matter) pose threats to the environment and human health. Environmental regulations in various countries (such as China's Air Pollution Prevention and Control Law and the EU's Industrial Emissions Directive) require companies to regularly monitor their waste gas emissions and to monitor stationary pollution sources (such as exhaust pipes). During monitoring, waste gas sampling guns are used to test stationary pollution sources to ensure that companies comply with environmental regulations.

[0003] During exhaust gas sampling, if the sampling gun is inserted into the fixed pollution source pipe without sealing the pipe, outside air will flow back into the pipe through the gaps. While discarded clothing or fabric is often used to seal the pipe, this method is ineffective. The influx of air significantly increases the O2 concentration in the exhaust gas. Normal flue gas O2 is typically 3%–15%, while air O2 is 21%, leading to errors in oxygen content calculations and an underestimation of actual pollutant emissions. Therefore, we propose a sealing device for the fixed pollution source exhaust gas sampling port to ensure the accuracy and reliability of exhaust gas sampling data. Utility Model Content

[0004] The purpose of this invention is to provide a sealing device for the exhaust gas sampling port of a fixed pollution source to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a sealing device for a fixed pollution source exhaust gas sampling port, comprising an exhaust gas sampling gun, a threaded sleeve rod fixedly connected to the outer wall of the sampling tube of the exhaust gas sampling gun, the outer wall of the threaded sleeve rod being threaded, a threaded sleeve block being threadedly connected to the outer wall of the threaded sleeve rod, the threaded sleeve block being cylindrical in shape and having a threaded inner cavity, and an annular protrusion being provided at one end of the outer wall of the threaded sleeve block, an inflation ring being sleeved on the outer wall of the threaded sleeve block, and one side of the inflation ring being in contact with the annular protrusion of the threaded sleeve block, and an air pipe being provided on the other side of the inflation ring, and the air pipe being connected to the inner liner of the inflation ring.

[0006] Preferably, an inner sleeve is fixedly connected to the side wall of the threaded sleeve block away from the annular protrusion. The outer annular wall of the inner sleeve has evenly spaced circular holes. An outer sleeve is fitted onto the outer wall of the inner sleeve with a clearance fit. The outer annular wall of the outer sleeve has evenly spaced circular holes, which correspond to the circular holes of the inner sleeve and are fixed in sequence by bolts. The side wall of the outer sleeve has symmetrically spaced circular holes with a clearance fit to the outer wall of the air tube.

[0007] Preferably, a support rod is fixedly connected to the center of the lower surface of the exhaust gas sampling gun, the inner cavity of the support rod is threaded, a stud is threaded to the inner thread of the support rod, a support is fixedly connected to the lower surface of the stud, and a circular hole is formed on the surface of the support.

[0008] Preferably, the air ring is made of high-temperature resistant rubber, and the rubber of the air ring is thickened.

[0009] Compared with the prior art, the beneficial effects of this utility model are as follows: This device is applied to the sampling stage of an exhaust gas sampling gun. By rotating the threaded sleeve, it can move along the axial direction of the gun barrel, thereby adjusting the sealing position to adapt to pipes of different lengths. At the same time, an inflation ring is set on the outer wall of the threaded sleeve. After the exhaust gas sampling gun is inserted into the fixed pollution source pipe, air is introduced into the inflation ring by connecting the air pipe at one end of the inflation ring through the inflation device to make it expand. Alternatively, the airtight core of the inflation ring can be removed to control the expansion degree, thus sealing the pipe opening and preventing outside air from flowing back into the pipe through gaps. This improves the sealing effect and avoids errors in calculating the emission concentration due to oxygen content, which could lead to an underestimation of the actual emission of pollutants, ensuring the authenticity and reliability of the exhaust gas sampling data. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of this utility model;

[0011] Figure 2 for Figure 1 Detailed structural diagram of the threaded sleeve block;

[0012] Figure 3 for Figure 1 Detailed structural diagram of the inner and outer jacket;

[0013] Figure 4 for Figure 1 Detailed structural diagram of the central air ring;

[0014] Figure 5 for Figure 1 Installation details of the threaded sleeve, inner sleeve, and outer sleeve;

[0015] In the diagram: 1. Exhaust gas sampling gun; 2. Threaded sleeve; 3. Threaded sleeve block; 4. Inflation ring; 5. Air pipe; 6. Inner sleeve; 7. Outer sleeve; 8. Support rod; 9. Stud; 10. Support. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figure 1-5 This utility model provides a technical solution: a sealing device for a fixed pollution source exhaust gas sampling port, including an exhaust gas sampling gun 1. A threaded sleeve rod 2 is fixedly connected to the outer wall of the sampling tube of the exhaust gas sampling gun 1. The outer wall of the threaded sleeve rod 2 is threaded. A threaded sleeve block 3 is threadedly connected to the outer wall of the threaded sleeve rod 2. The threaded sleeve block 3 is cylindrical in shape and has a threaded inner cavity. An annular protrusion is provided at one end of the outer wall of the threaded sleeve block 3. An inflation ring 4 is sleeved on the outer wall of the threaded sleeve block 3. One side of the inflation ring 4 is in contact with the annular protrusion of the threaded sleeve block 3. An air pipe 5 is provided on the other side of the inflation ring 4 and the air pipe 5 is connected to the inner liner of the inflation ring 5.

[0018] A threaded sleeve 2 is installed at the barrel of the exhaust gas sampling gun 1, and a threaded sleeve block 3 is matched at the thread. By rotating the sleeve block, it can move along the axial direction of the gun barrel, thereby adjusting the sealing position to adapt to pipes of different lengths. At the same time, an inflation ring 4 is installed on the outer wall of the threaded sleeve block 3. When the exhaust gas sampling gun 1 is inserted into the fixed pollution source pipe, the air pipe 5 at one end of the inflation ring 4 is connected through an inflation device to input air to make it expand. Alternatively, the airtight core of the inflation ring can be removed to control the expansion degree and seal the pipe opening.

[0019] like Figure 1 , Figure 2 , Figure 3 , Figure 5 As shown, an inner sleeve 6 is fixedly connected to the side wall of the threaded sleeve 3 away from the annular protrusion. The outer annular wall of the inner sleeve 6 has evenly spaced circular holes. An outer sleeve 7 is fitted onto the outer wall of the inner sleeve 6 with a clearance fit. The outer annular wall of the outer sleeve 7 has evenly spaced circular holes. The circular holes of the outer sleeve 7 correspond to the circular holes of the inner sleeve 6 and are fixed by bolts passing through them in sequence. The side wall of the outer sleeve 7 has symmetrical circular holes, which are clearance fit with the outer wall of the air pipe 5.

[0020] The round hole of the outer sleeve 7 corresponds to the round hole of the inner sleeve 6. It can be fixed by bolts, which adds an extra interception function. The outer sleeve 7 can be fitted onto the outside of the fixed pollution source pipe. Different specifications of outer sleeve 7 can be replaced according to the actual pipe to adapt to the current smooth operation. It can play a certain limiting function and make it easier to lift when inserting the exhaust gas sampling gun 1.

[0021] like Figure 1 and Figure 2 As shown, a support rod 8 is fixedly connected to the center of the lower surface of the exhaust gas sampling gun 1. The inner cavity of the support rod 8 is threaded, and a stud 9 is threadedly connected to the inner thread of the support rod 8. A support 10 is fixedly connected to the lower surface of the stud 9, and a circular hole is formed on the surface of the support 10.

[0022] By connecting the stud 9 to the support rod 8, the support 10 can be fixed to its bottom. At the same time, the surface of the support 10 has a round hole, which can also be connected to the tripod. Different sizes of support 10 can be prepared according to the specifications of the tripod to ensure the overall connection and further improve the labor-saving function.

[0023] like Figure 1 and Figure 4 As shown, the inflation ring 4 is made of high-temperature resistant rubber, and the rubber of the inflation ring 4 is thickened.

[0024] The air ring 4 is made of high-temperature resistant material, which can be selected from silicone, fluororubber or ceramic fiber reinforced composite materials. Its outer wall is thickened to enhance wear resistance and pressure resistance, ensuring that it can maintain sealing performance in high-temperature environments such as 200-400℃.

[0025] Working Principle: This device is used in the sampling stage of the exhaust gas sampling gun 1. A threaded sleeve 2 is installed at the barrel of the exhaust gas sampling gun 1, and a threaded sleeve block 3 is matched at the thread. By rotating the sleeve block, it can move along the axial direction of the barrel, thereby adjusting the sealing position to adapt to pipes of different lengths. At the same time, an inflation ring 4 is set on the outer wall of the threaded sleeve block 3. After the exhaust gas sampling gun 1 is inserted into the fixed pollution source pipe, air is introduced into the inflation ring 4 by connecting the air pipe 5 at one end of the inflation device to make it expand. Alternatively, the expansion degree can be controlled by removing the airtight core of the inflation ring to seal the pipe opening. The thread adjustment and inflation sealing do not require complicated installation steps. After inserting the sampling gun, rotating the sleeve block and inflating the air completes the sealing. The operation is simple. After sampling, the inflation ring can be quickly contracted by removing the airtight core, making it easy to pull out the sampling gun, reducing the high temperature exposure time and improving safety.

[0026] Although 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 alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A sealing device for a sampling port of exhaust gas from a stationary pollution source, characterized in that: The device includes an exhaust gas sampling gun (1), with a threaded sleeve rod (2) fixedly connected to the outer wall of the sampling tube of the exhaust gas sampling gun (1). The outer wall of the threaded sleeve rod (2) is threaded, and a threaded sleeve block (3) is threadedly connected to the outer wall of the threaded sleeve rod (2). The threaded sleeve block (3) is cylindrical in shape and has a threaded inner cavity. An annular protrusion is provided at one end of the outer wall of the threaded sleeve block (3). An inflation ring (4) is fitted onto the outer wall of the threaded sleeve block (3), and one side of the inflation ring (4) is in contact with the annular protrusion of the threaded sleeve block (3). An air pipe (5) is provided on the other side of the inflation ring (4), and the air pipe (5) is connected to the inner liner of the inflation ring (4).

2. The sealing device for a stationary pollution source exhaust gas sampling port according to claim 1, characterized in that: The inner sleeve (6) is fixedly connected to the side wall of the threaded sleeve (3) away from the annular protrusion. The outer ring wall of the inner sleeve (6) is evenly provided with circular holes. The outer sleeve (7) is sleeved on the outer wall of the inner sleeve (6) and the two are in clearance fit. The outer ring wall of the outer sleeve (7) is evenly provided with circular holes. The circular holes of the outer sleeve (7) correspond to the circular holes of the inner sleeve (6) and are fixed by bolts in sequence. The side wall of the outer sleeve (7) is symmetrically provided with circular holes and is in clearance fit with the outer wall of the air pipe (5).

3. The sealing device for a stationary pollution source exhaust gas sampling port according to claim 1, characterized in that: A support rod (8) is fixedly connected to the center of the lower surface of the exhaust gas sampling gun (1). The inner cavity of the support rod (8) is threaded. A stud (9) is threaded to the inner thread of the support rod (8). A support (10) is fixedly connected to the lower surface of the stud (9). A circular hole is circumferentially opened on the surface of the support (10).

4. The sealing device for a stationary pollution source exhaust gas sampling port according to claim 1, characterized in that: The inflation ring (4) is made of high-temperature resistant rubber, and the rubber of the inflation ring (4) is thickened.

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