Flue gas collecting device

Abstract

This utility model belongs to the field of flue gas analysis technology, specifically disclosing a flue gas collection device, including: a mounting cover, a mounting bracket, and a shielding component. The mounting cover is used to connect to the exhaust pipe, with both ends of the mounting cover being open and one end forming a through-hole. The mounting bracket is connected to the mounting cover and is provided with a connector. The connector has a through-hole exhaust channel, one end of which connects to the interior of the mounting cover. The connector is used to detachably connect to the collection tube of the flue gas analyzer. The shielding component is movably connected to the mounting cover and has a retracted state and an extended state. In the extended state, the shielding component closes the through-hole. The flue gas collection device disclosed in this utility model can adapt to the flue gas collection needs under different emission conditions, improving the convenience and reliability of sampling.

Description

Technical Field

[0001] This utility model relates to the field of flue gas analysis technology, and in particular to a flue gas collection device. Background Technology

[0002] The flue gas produced during gas combustion contains harmful gases such as CO and NOx, necessitating the control of flue gas emissions from household gas appliances. The amount of harmful gases in the flue gas is a crucial indicator of whether a gas water heater is qualified. Before gas water heaters leave the factory, manufacturers need to test the composition and content of the flue gas. Gas water heaters emit gas through a flue pipe, and the composition of the flue gas differs depending on whether the pipe is unobstructed or blocked. Therefore, sampling and testing include both normal and blocked emissions.

[0003] The typical testing method is as follows: for normal emission sampling, a flue gas sampling device is inserted into the exhaust port of the flue to collect a sample; for blocked emission sampling, aluminum foil tape is typically used to block the exhaust port of the flue, and the flue gas sampling device is inserted into the aluminum foil tape to collect a sample. The testing process requires multiple samplings under different combustion conditions, each requiring both normal and blocked emission measurements. The aluminum foil tape needs to be removed and reinstalled repeatedly, making the sampling process cumbersome and inefficient. Utility Model Content

[0004] The technical problem solved by this utility model is to provide a flue gas collection device that can solve the problems of cumbersome collection steps, low efficiency and inconvenient operation of existing flue gas sampling devices when collecting flue gas under different emission conditions.

[0005] The above-mentioned technical problems are solved by the following technical solutions:

[0006] A flue gas collection device is provided for collecting flue gas discharged from an exhaust pipe, comprising: a mounting cover, a mounting bracket, and a shielding assembly. The mounting cover is used to connect to the exhaust pipe, with both ends of the mounting cover being open and one end forming a through-hole. The mounting bracket is connected to the mounting cover and is provided with a connector. The connector has a through-exhaust channel, one end of which connects to the interior of the mounting cover. The connector is used for detachably connecting to the collection tube of a flue gas analyzer. The shielding assembly is movably connected to the mounting cover and has a retracted state and an extended state. In the extended state, the shielding assembly closes the through-hole.

[0007] The flue gas collection device of this utility model has the following advantages compared with the prior art: The flue gas collection device includes a mounting cover, a mounting bracket, and a shielding component. The mounting cover is used to connect to the exhaust pipe, with both ends of the mounting cover being open and one end forming a guide port. The mounting bracket is connected to the mounting cover and is provided with a connector. The connector has a through exhaust channel, one end of which connects to the interior of the mounting cover. The connector is used to detachably connect to the collection tube of the flue gas analyzer. The shielding component is movably connected to the mounting cover and has a retracted state and an extended state. In the extended state, the shielding component closes the guide port. The mounting bracket provides stable support for the connector, which does not require manual operation and avoids detachment and damage under external force. When the shielding component is in the retracted state, the connector can sample flue gas from the exhaust pipe in a normal emission state. In the extended state, the shielding component closes the guide port, forming a blocked emission state of the exhaust pipe. The exhaust channel is always connected to the interior of the mounting cover and is therefore unaffected by the shielding component. The connector can sample flue gas from the blocked emission state of the exhaust pipe. For data collection needs under different operating conditions and emission states, simply switch the shielding component to either an extended or retracted state for easy data collection. The flue gas collection device is convenient to use and improves collection efficiency. Moreover, compared to sealing with aluminum foil tape, the mounting cover maintains a stable connection with the exhaust pipe even when the fan airflow increases and the exhaust temperature rises, preventing detachment and avoiding the problem of some overflowing flue gas flowing back into the exhaust pipe due to the mounting cover, which could lead to large errors and low accuracy in test results. This also reduces the sampling difficulty of the connection parts.

[0008] In one embodiment, the shielding assembly includes a plurality of baffles movably connected to the mounting cover. The baffles are movable in a plane parallel to the passage opening. When the plurality of baffles move to a position where they are sequentially stacked along the axial direction of the passage opening, the shielding assembly forms the folded state. When the baffles move to a position where two adjacent baffles overlap along the axial direction of the passage opening and the projection of the plurality of baffles along the axial direction covers the passage opening, the shielding assembly forms the unfolded state.

[0009] In one embodiment, a limiting structure is provided between two adjacent baffles, the limiting structure being used to constrain the blocking assembly in the deployed state, so that the two adjacent baffles at least partially overlap along the axial direction of the guide opening; and / or,

[0010] One end of the baffle is provided with a toggle element, which is located outside the mounting cover.

[0011] In one embodiment, the mounting bracket is mounted on the through port, and a rotating shaft is provided in the middle of the mounting bracket. The axial direction of the rotating shaft coincides with the axial direction of the through port. The baffle extends radially along the through port and is rotatably connected to the rotating shaft. A plurality of the baffles are arranged sequentially along the length direction of the rotating shaft.

[0012] In one embodiment, the connector is disposed in the middle of the mounting bracket, the exhaust channel extends axially along the guide port, and a portion of the connector forms the pivot portion.

[0013] In one embodiment, the mounting bracket has a mounting hole, and the connector passes through the mounting hole. The connector includes a rotating shaft portion located below the mounting bracket and a mounting portion located above the mounting bracket. The mounting portion is used to detachably connect the sampling tube of the flue gas analyzer, and the mounting portion and the sampling tube are adapted to each other.

[0014] In one embodiment, the connector further includes a locking nut screwed onto the rotating shaft, and a plurality of the baffles are clamped between the locking nut and the mounting bracket, wherein the outer diameter of the mounting portion is larger than the diameter of the mounting hole.

[0015] In one embodiment, the end of the mounting portion away from the rotating shaft portion has a guide portion, the guide portion being conical in shape and having a large-diameter end and a small-diameter end, the large-diameter end being connected to the mounting portion, and the guide portion being configured to guide the collection tube to be fitted onto the outside of the mounting portion.

[0016] In one embodiment, the unfolded area of ​​the shielding component is adjustable to close part of the passage.

[0017] In one embodiment, the mounting cover has side walls for inserting into the exhaust pipe.

[0018] In one embodiment, the side wall includes a first side wall and a second side wall arranged sequentially along the axial direction, the diameter of the first side wall is smaller than the diameter of the second side wall, and the end of the second side wall away from the first side wall forms the passage. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the flue gas collection device provided in an embodiment of the present utility model;

[0020] Figure 2 A cross-sectional view of the flue gas collection device provided in an embodiment of this utility model;

[0021] Figure 3 yes Figure 2 A magnified schematic diagram of a portion of the structure in section A.

[0022] Figure 4 This is a schematic diagram of the structure of the flue gas collection device connected to the exhaust pipe provided in an embodiment of the present invention.

[0023] Label Explanation:

[0024] 1. Mounting cover; 11. Through port; 13. Side wall; 131. First side wall; 132. Second side wall; 2. Mounting bracket; 21. Connector; 211. Exhaust channel; 22. Locking nut; 23. Rotating shaft; 24. Mounting part; 25. Guide part; 3. Shielding assembly; 31. Baffle; 32. Actuating element;

[0025] 100. Smoke exhaust pipe. Detailed Implementation

[0026] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0027] In the description of this application, it should be understood that the terms "upper", "lower", "vertical", "horizontal", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0028] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0029] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0030] like Figures 1-4 As shown, this embodiment of the invention first provides a flue gas collection device, which is used to collect the flue gas discharged from the exhaust pipe 100. The exhaust pipe 100 can be applied to gas appliances such as gas water heaters.

[0031] The flue gas collection device includes a mounting cover 1, a mounting bracket 2, and a shielding assembly 3. The mounting cover 1 is used to connect to the exhaust pipe 100, with both ends of the mounting cover 1 being open and one end forming a guide port 11. The mounting bracket 2 is connected to the mounting cover 1 and is equipped with a connector 21. The connector 21 has a through exhaust channel 211, one end of which connects to the interior of the mounting cover 1. The connector 21 is used to detachably connect to the collection tube of the flue gas analyzer (not shown in the figure). The shielding assembly 3 is movably connected to the mounting cover 1 and has a retracted state and an extended state. In the extended state, the shielding assembly 3 closes the guide port 11. The mounting bracket 2 provides stable support for the connector 21, which does not require manual operation and avoids detachment and damage under external force. When the shielding component 3 is in the retracted state, the connector 21 can sample flue gas from the exhaust pipe 100 in its normal emission state; when the shielding component 3 is in the extended state, it closes the guide port 11, forming a blocked emission state of the exhaust pipe 100, and the connector 21 can sample flue gas from the blocked emission state of the exhaust pipe 100. For the collection needs of different emission states under different operating conditions, simply switch the shielding component 3 to the extended or retracted state, which is convenient for collection, and the flue gas collection device is easy to use, which helps to improve collection efficiency. Moreover, compared with aluminum foil tape sealing, the mounting cover 1 can still maintain a stable connection with the exhaust pipe 100 when the fan air volume increases and the exhaust temperature rises, avoiding detachment and preventing the problem of large error and low accuracy of test results caused by some overflowing flue gas flowing back into the exhaust pipe 100 due to the mounting cover 1, thus reducing the sampling difficulty of the connector 21.

[0032] It should be noted that the flue gas analyzer can analyze the flue gas collected by the flue gas collection device. The specific structure of the flue gas analyzer and the principle of flue gas analysis can be set up with reference to existing technology, and will not be described in detail here.

[0033] The shielding assembly 3 includes multiple baffles 31 movably connected to the mounting cover 1. The baffles 31 can move in a plane parallel to the guide opening 11. When the multiple baffles 31 move to a position where they are stacked sequentially along the axial direction of the guide opening 11, the shielding assembly 3 is in a retracted state, and the exhaust pipe 100 is in a normal emission state. When the baffles 31 move to a position where two adjacent baffles 31 overlap along the axial direction of the guide opening 11 and the projection of the multiple baffles 31 along the axial direction covers the guide opening 11, the shielding assembly 3 is in an unfolded state. In the unfolded state, the shielding assembly 3 closes the guide opening 11, and the exhaust pipe 100 is in a blocked emission state.

[0034] The movement of the baffle 31 within a plane parallel to the guide opening 11 can be a translational movement in a certain direction or a rotation about a certain point. Exemplarily, in one embodiment, the baffle 31 extends radially along the guide opening 11 and is rotatably mounted on the mounting cover 1. Specifically, the mounting bracket 2 is mounted at the guide opening 11, and a rotating shaft 23 is provided in the middle of the mounting bracket 2. The axial direction of the rotating shaft 23 coincides with the axial direction of the guide opening 11. The baffle 31 is rotatably connected to the rotating shaft 23, and multiple baffles 31 are arranged sequentially along the length direction of the rotating shaft 23 to ensure that the rotation of the multiple baffles 31 does not interfere with each other. When the multiple baffles 31 rotate to coincide with each other along the length direction of the rotating shaft 23, the blocking assembly 3 forms a retracted state. Figure 2 As shown, multiple baffles 31 are arranged sequentially along the length of the rotating shaft 23 and are threadedly connected to the rotating shaft 23 by locking nuts 22 to realize the installation of baffles 31.

[0035] In the unfolded state of the shielding component 3, in order to reduce the overlapping area between the baffles 31, the baffles 31 are fan-shaped.

[0036] To reduce the number of baffles 31 and increase the ease of state transition of the blocking assembly 3, the length of a single baffle 31 is greater than or equal to the diameter of the through port 11, and they are arranged symmetrically with respect to the rotating shaft 23. Figure 1 As shown, the baffle 31 consists of two fan-shaped parts symmetrically arranged relative to the rotating shaft 23.

[0037] A limiting structure is provided between two adjacent baffles 31. The limiting structure is used to constrain the shielding assembly 3 in the deployed state, so that the two adjacent baffles 31 at least partially overlap along the axial direction of the guide opening 11, ensuring that the shielding assembly 3 completely blocks the guide opening 11 in the deployed state and prevents flue gas leakage. For example, each of the radial edges of the two adjacent baffles 31 is provided with a flange protruding along the axial direction. When the two flanges abut, the two adjacent baffles 31 cannot rotate relative to each other. At this time, the two adjacent baffles 31 at least partially overlap along the axial direction of the guide opening 11. Moreover, when the two flanges abut, the constraint direction of the two flanges can also be used to make one baffle 31 drive the other adjacent baffle 31 to rotate, making operation more convenient.

[0038] To facilitate the movement of the baffle 31, a toggle element 32 is provided at one end of the baffle 31. The toggle element 32 is located outside the mounting cover 1, allowing the tester to apply force to the toggle element 32 to move the baffle 31. The shape of the toggle element 32 in the attached figure is for illustrative purposes only.

[0039] In one embodiment, the connector 21 is disposed in the middle of the mounting bracket 2, the exhaust channel 211 extends axially along the guide port 11, part of the connector 21 forms a rotating shaft 23, and part of the connector 21 is used to connect the collection tube of the flue gas analyzer. The connector 21 has two functions at the same time, which can simplify the structure and improve the ease of use of the flue gas collection device.

[0040] Specifically, the mounting bracket 2 has a mounting hole, and the connector 21 passes through the mounting hole. The connector 21 includes a rotating shaft 23 located below the mounting bracket 2 and a mounting part 24 located above the mounting bracket 2. The mounting part 24 is used for detachably connecting the sampling tube of the flue gas analyzer, and the shape of the mounting part 24 is adapted to the sampling tube.

[0041] like Figure 2 and Figure 3 As shown, in order to assemble the baffle 31, the connector 21 also includes a locking nut 22, which is screwed onto the rotating shaft 23. Multiple baffles 31 are sandwiched between the locking nut 22 and the mounting bracket 2, preventing the baffles 31 from falling off the connector 21. The outer diameter of the mounting portion 24 is larger than the diameter of the mounting hole. When the connector 21 passes through the mounting hole, the larger outer diameter of the mounting portion 24 prevents the connector 21 from falling off.

[0042] At the end of the mounting section 24 furthest from the rotating shaft section 23, there is a guide section 25. The guide section 25 is conical and has a large-diameter end and a small-diameter end. The large-diameter end is connected to the mounting section 24, and the guide section 25 is configured to guide the collection tube to be fitted onto the outside of the mounting section 24. Fitting the collection tube onto the outside of the mounting section 24 helps reduce flue gas leakage, and the small-diameter end, due to its smaller size, facilitates guiding the collection tube to be fitted onto the outside of the mounting section 24.

[0043] For some gas appliances, the exhaust pipe 100 may become blocked to varying degrees. Therefore, the unfolded area of ​​the shielding component 3 can be adjusted to close part of the guide opening 11, simulating different degrees of blockage in the exhaust pipe 100. It can be understood that the larger the unfolded area of ​​the shielding component 3, the greater the degree of blockage in the exhaust pipe 100. By changing the unfolded area of ​​the shielding component 3, the conductivity of the guide opening 11 can meet the detection requirements, thus improving the versatility of the flue gas collection device. Specifically, for the shielding component 3 in its retracted state, partial unfolding of the shielding component 3 can be achieved by rotating only part of the baffle 31.

[0044] The mounting cover 1 has a side wall 13, which increases the axial distance between the guide port 11 and the discharge port, and gathers the flue gas away from the discharge port. This makes it difficult for a small amount of leaked flue gas to flow back to the discharge port under blocked discharge conditions, thereby increasing the collection reliability of the flue gas collection device.

[0045] To increase the ease of detachable connection between the mounting cover 1 and the exhaust pipe 100, the mounting cover 1 and the exhaust pipe 100 are connected by an insertion fitting, with the side wall 13 fitted onto the exhaust pipe 100 or embedded within the exhaust pipe 100. Furthermore, an interference fit is formed between the mounting cover 1 and the exhaust pipe 100 to increase the reliability of the insertion connection.

[0046] In one embodiment, the side wall 13 includes a first side wall 131 and a second side wall 132 arranged sequentially along the axial direction. The diameter of the first side wall 131 is smaller than the diameter of the second side wall 132, and the end of the second side wall 132 away from the first side wall 131 forms an exhaust port. The mounting cover 1 is embedded in the exhaust pipe 100, and the first side wall 131 fits against the inner wall of the exhaust pipe 100. Due to the presence of the second side wall 132, it is convenient to control the insertion length of the mounting cover 1 and the exhaust pipe 100, ensuring the axial distance between the guide port 11 and the exhaust port. Moreover, the increased internal volume formed by the second side wall 132 facilitates more uniform mixing of flue gas within the second side wall 132, increasing the accuracy of flue gas sampling.

[0047] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0048] The specific embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A flue gas collection device for collecting flue gas discharged from a flue pipe (100), characterized in that, include: The installation includes a cover (1), a bracket (2), and a shielding assembly (3). The cover (1) is used to connect to the exhaust pipe (100). Both ends of the cover (1) are open and one end forms a guide port (11). The bracket (2) is connected to the cover (1). A connector (21) is provided on the bracket (2). The connector (21) has an open exhaust channel (211). One end of the exhaust channel (211) is connected to the interior of the cover (1). The connector (21) is used to detachably connect to the collection tube of the flue gas analyzer. The shielding assembly (3) is movably connected to the cover (1). The shielding assembly (3) has a retracted state and an extended state. In the extended state, the shielding assembly (3) closes the guide port (11).

2. The flue gas collection device according to claim 1, characterized in that, The shielding assembly (3) includes a plurality of baffles (31) movably connected to the mounting cover (1). The baffles (31) can move in a plane parallel to the guide opening (11). When the plurality of baffles (31) move to be stacked sequentially along the axial direction of the guide opening (11), the shielding assembly (3) forms the folded state. When the baffles (31) move to the point where two adjacent baffles (31) overlap along the axial direction of the guide opening (11) and the projection of the plurality of baffles (31) along the axial direction covers the guide opening (11), the shielding assembly (3) forms the unfolded state.

3. The flue gas collection device according to claim 2, characterized in that, A limiting structure is provided between two adjacent baffles (31), the limiting structure being used to constrain the shielding assembly (3) in the unfolded state, so that the two adjacent baffles (31) at least partially overlap along the axial direction of the guide opening (11); and / or, One end of the baffle (31) is provided with a toggle element (32), which is located outside the mounting cover (1).

4. The flue gas collection device according to claim 2, characterized in that, The mounting bracket (2) is mounted on the guide port (11). A rotating shaft (23) is provided in the middle of the mounting bracket (2). The axial direction of the rotating shaft (23) coincides with the axial direction of the guide port (11). The baffle (31) extends radially along the guide port (11). The baffle (31) is rotatably connected to the rotating shaft (23). A plurality of the baffles (31) are arranged sequentially along the length direction of the rotating shaft (23).

5. The flue gas collection device according to claim 4, characterized in that, The connector (21) is disposed in the middle of the mounting bracket (2), the exhaust channel (211) extends axially along the guide port (11), and part of the connector (21) forms the rotating shaft (23).

6. The flue gas collection device according to claim 5, characterized in that, The mounting bracket (2) has a mounting hole, and the connector (21) passes through the mounting hole. The connector (21) includes a rotating shaft (23) located below the mounting bracket (2) and a mounting part (24) located above the mounting bracket (2). The mounting part (24) is used to detachably connect the sampling tube of the flue gas analyzer, and the mounting part (24) and the sampling tube are compatible.

7. The flue gas collection device according to claim 6, characterized in that, The connector (21) also includes a locking nut (22), which is screwed onto the rotating shaft (23), and a plurality of baffles (31) are sandwiched between the locking nut (22) and the mounting bracket (2), and the outer diameter of the mounting part (24) is larger than the diameter of the mounting hole.

8. The flue gas collection device according to claim 6, characterized in that, The mounting portion (24) has a guide portion (25) at its end away from the rotating shaft portion (23). The guide portion (25) is conical and has a large diameter end and a small diameter end. The large diameter end is connected to the mounting portion (24). The guide portion (25) is configured to guide the collection tube to be fitted onto the outside of the mounting portion (24).

9. The flue gas collection device according to any one of claims 1-8, characterized in that, The unfolded area of ​​the shielding component (3) is adjustable to close part of the passage (11).

10. The flue gas collection device according to any one of claims 1-8, characterized in that, The mounting cover (1) has a side wall (13) for inserting into the exhaust pipe (100).

11. The flue gas collection device according to claim 10, characterized in that, The side wall (13) includes a first side wall (131) and a second side wall (132) arranged sequentially along the axial direction. The diameter of the first side wall (131) is smaller than the diameter of the second side wall (132). The end of the second side wall (132) away from the first side wall (131) forms the passage (11).

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