A negative pressure prevention flue gas sampling plugging device

Abstract

The utility model discloses a kind of flue gas sampling plugging devices of preventing negative pressure, it is related to flue gas sampling technical field, including plugging head, the plugging head is installed in exhaust cylinder, the inside of the plugging head is provided with sampler, and sampler is used to sample the flue gas in exhaust cylinder;The both ends of the plugging head are provided with movable slot, the inner side of the movable slot is slidably connected with clamping plate, and support spring is connected between the clamping plate and movable slot.The utility model is pushed into exhaust cylinder after plugging head, clamping plate will be abutted in exhaust cylinder inner wall, and cooperate annular baffle to realize the quick firm installation of plugging head on exhaust cylinder, to prevent being inhaled by negative pressure, and plugging head, annular baffle and clamping plate are all selected fire-resistant material, compared with cloth strip, it is more high-temperature resistant, improve security, simultaneously, realize the double sealing between plugging head and exhaust cylinder by sealing ring one, realize the triple sealing between sampler and sampling port by sealing ring two.

Description

Technical Field

[0001] This utility model relates to the field of flue gas sampling technology, specifically a flue gas sampling and sealing device to prevent negative pressure. Background Technology

[0002] To meet the requirements of current environmental sampling standards, the exhaust stacks used by enterprises will be sampled by opening holes. The flue gas sampling port is used to sample flue gas for analysis and monitoring. The flue gas in the sampling pipe is guided to the analysis equipment for analysis through the sampling head. It can be directly connected or sampled through the extraction system.

[0003] When sampling flue gas through a sampling head inserted into the flue, the sampling port needs to be sealed. In practice, cloth strips are often used for sealing. However, since cloth strips are mostly made of synthetic fibers or cotton and linen, which are flammable, and the flue gas temperature in some exhaust pipes can reach 300 degrees Celsius, there is a risk of fire. Furthermore, under negative pressure at the sampling port, there is a possibility that the cloth strips may be sucked into the exhaust pipe, which could easily cause an accident. Utility Model Content

[0004] The purpose of this invention is to provide a flue gas sampling and sealing device that prevents negative pressure, so as to solve the technical problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a flue gas sampling and blocking device for preventing negative pressure, including a blocking head, the blocking head being installed inside an exhaust stack, and a sampler being provided inside the blocking head, the sampler being used to sample the flue gas inside the exhaust stack;

[0006] Both ends of the plugging head are provided with movable grooves. A retaining plate is slidably connected to the inner side of the movable groove. A supporting spring is connected between the retaining plate and the movable groove. An annular baffle is fixedly connected to the surface of the plugging head. The annular baffle and the retaining plate cooperate to realize the installation of the plugging head in the exhaust pipe. A sampling port is provided inside one side of the plugging head.

[0007] Preferably, one end of the card plate is configured as a beveled structure.

[0008] Preferably, the surface of the sealing head is provided with two sealing rings between the annular baffle and the card plate, and the sealing rings are used to achieve a double seal between the sealing head and the exhaust pipe.

[0009] Preferably, three sealing strips are equidistantly arranged on the inner surface of the sampling port, and the sealing strips are used to achieve triple sealing between the sampler and the sampling port. The inner surface of the sealing strips is in close contact with the outer surface of the sampler.

[0010] Preferably, the sealing head, annular baffle, and clamping plate are all made of stainless steel.

[0011] Preferably, the annular baffle and the clamping plate are each provided with a sealing strip on the side near the sealing head to improve the sealing performance and installation stability between the sealing head and the exhaust pipe.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This anti-negative pressure flue gas sampling and sealing device, after the sealing head is pushed into the exhaust pipe, the clamping plate will abut against the inner wall of the exhaust pipe, and together with the annular baffle, the sealing head is quickly and firmly installed on the exhaust pipe, thereby preventing it from being sucked in by negative pressure. Moreover, the sealing head, annular baffle and clamping plate are all made of fire-resistant materials, which are more heat-resistant than cloth strips, thus improving safety. At the same time, the sealing head and the exhaust pipe are double-sealed by the first sealing ring, and the sampler and the sampling port are triple-sealed by the second sealing ring. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the sealing head of this utility model;

[0015] Figure 2 This is a schematic diagram of the main cross-sectional structure of the sealing head of this utility model;

[0016] Figure 3 This is a three-dimensional cross-sectional structural diagram of the sealing head and exhaust pipe of this utility model;

[0017] Figure 4 This utility model Figure 3 Enlarged view of point A in the middle;

[0018] Figure 5 This is a three-dimensional structural diagram of the sealing head and exhaust pipe of this utility model.

[0019] In the diagram: 1. Sealing head; 2. Annular baffle; 3. Clamping plate; 4. Support spring; 5. Movable groove; 6. Sealing ring one; 7. Sampling port; 8. Sealing strip two; 9. Sampler. Detailed Implementation

[0020] 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.

[0021] Please see Figure 1 , Figure 3 and Figure 5This utility model provides a technical solution: a flue gas sampling and sealing device for preventing negative pressure, including a sealing head 1, the sealing head 1 is installed in the exhaust pipe, and a sampler 9 is provided inside the sealing head 1, the sampler 9 is used to sample the flue gas in the exhaust pipe;

[0022] Specifically, after the sampler 9 is pushed into the exhaust stack through the sampling port 7, it is convenient to sample the flue gas in the exhaust stack through the sampler 9.

[0023] exist Figures 1-5 In the middle: Both ends of the sealing head 1 are provided with movable grooves 5. The movable grooves 5 are used to support and limit the position of the card plate 3. The card plate 3 is slidably connected to the inner side of the movable groove 5. One end of the card plate 3 is set as an inclined structure. A support spring 4 is connected between the card plate 3 and the movable groove 5. An annular baffle 2 is fixedly connected to the surface of the sealing head 1. The annular baffle 2 and the card plate 3 cooperate to realize the installation of the sealing head 1 in the exhaust pipe.

[0024] Specifically, since the clamping plate 3 and the sealing head 1 are elastically connected by the support spring 4, and one end of the clamping plate 3 is set as a bevel structure, when the sealing head 1 is pushed towards the exhaust pipe, the clamping plate 3 will abut against the inner wall of the exhaust pipe under the action of the support spring 4. At the same time, in conjunction with the annular baffle 2, the sealing head 1 is quickly and firmly installed on the exhaust pipe, thereby preventing it from being sucked in by negative pressure and improving safety.

[0025] exist Figure 1 , Figure 2 and Figure 4 In the middle: Two sealing rings 6 are provided on the surface of the sealing head 1 between the annular baffle 2 and the clamping plate 3. The sealing rings 6 are used to achieve double sealing between the sealing head 1 and the exhaust pipe.

[0026] Specifically, a double seal is achieved between the sealing head 1 and the exhaust pipe through the sealing ring 6.

[0027] exist Figure 2 In the middle: A sampling port 7 is provided inside one side of the sealing head 1. Three sealing strips 8 are equidistantly arranged on the inner surface of the sampling port 7. The sealing strips 8 are used to achieve triple sealing between the sampler 9 and the sampling port 7. The inner surface of the sealing strips 8 is in close contact with the outer surface of the sampler 9.

[0028] Specifically, the sealing strip 8 can achieve a triple seal between the sampler 9 and the sampling port 7.

[0029] exist Figures 1-5 In the middle: the sealing head 1, the annular baffle 2 and the clamping plate 3 are all made of stainless steel.

[0030] Specifically, by using stainless steel for the sealing head 1, the annular baffle 2, and the clamping plate 3, the materials can be more resistant to high temperatures compared to cloth strips, thus improving safety.

[0031] exist Figure 4 In the middle: both the annular baffle 2 and the clamping plate 3 are equipped with sealing strips on the side near the sealing head 1 to improve the sealing performance and installation firmness between the sealing head 1 and the exhaust pipe.

[0032] Specifically, by providing sealing strips on both the annular baffle 2 and the clamping plate 3 on the side near the sealing head 1, the sealing performance and installation firmness between the sealing head 1 and the exhaust pipe can be improved.

[0033] In actual use, the sealing head 1 is pushed towards the exhaust pipe. During this process, the clamping plate 3 will first retract into the movable groove 5 under the action of the support spring 4, and then extend and abut against the inner wall of the exhaust pipe. At the same time, the annular baffle 2 will help to quickly and firmly install the sealing head 1 on the exhaust pipe, thereby preventing it from being sucked in by negative pressure. At the same time, the two sealing rings 6 connected to the surface of the sealing head 1 will achieve a double seal between the sealing head 1 and the exhaust pipe. Then, the sampler 9 will be pushed into the exhaust pipe through the sampling port 7 so that the sampler 9 can be used to sample the flue gas in the exhaust pipe.

[0034] Electrical equipment (including but not limited to motors, electric actuators, etc.) is safely powered by an external power source and controlled by a control box. The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0035] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A flue gas sampling and sealing device for preventing negative pressure, comprising a sealing head (1), the sealing head (1) being installed inside an exhaust stack, wherein a sampler (9) is disposed inside the sealing head (1), and the sampler (9) is used to sample the flue gas inside the exhaust stack; characterized in that: Both ends of the plugging head (1) are provided with movable grooves (5). A retaining plate (3) is slidably connected to the inner side of the movable groove (5). A supporting spring (4) is connected between the retaining plate (3) and the movable groove (5). An annular baffle (2) is fixedly connected to the surface of the plugging head (1). The annular baffle (2) and the retaining plate (3) cooperate to realize the installation of the plugging head (1) in the exhaust pipe. A sampling port (7) is provided inside one side of the plugging head (1).

2. The anti-negative pressure flue gas sampling and sealing device according to claim 1, characterized in that: One end of the card plate (3) is configured as a sloping structure.

3. The anti-negative pressure flue gas sampling and sealing device according to claim 2, characterized in that: The surface of the plug (1) is provided with two sealing rings (6) between the annular baffle (2) and the card plate (3), and the sealing rings (6) are used to achieve double sealing between the plug (1) and the exhaust pipe.

4. The anti-negative pressure flue gas sampling and sealing device according to claim 1, characterized in that: The inner surface of the sampling port (7) is provided with three sealing strips (8) at equal intervals, and the sealing strips (8) are used to achieve triple sealing between the sampler (9) and the sampling port (7). The inner surface of the sealing strips (8) is in close contact with the outer surface of the sampler (9).

5. The anti-negative-pressure flue gas sampling and sealing device according to claim 1, characterized in that: The sealing head (1), the annular baffle (2) and the clamping plate (3) are all made of stainless steel.

6. The anti-negative-pressure flue gas sampling and sealing device according to claim 5, characterized in that: The annular baffle (2) and the clamping plate (3) are both equipped with sealing strips on the side near the sealing head (1) to improve the sealing performance and installation firmness between the sealing head (1) and the exhaust pipe.

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