A flue gas sampling device

Abstract

The present application relates to the technical field of smoke sampling equipment, in particular to a flue gas sampling device, comprising: a sampling cylinder, an installation groove is arranged through the side wall of the sampling cylinder; a protective sleeve is installed in the sampling cylinder, an elastic reset member is arranged between the protective sleeve and the bottom of the sampling cylinder, a filter cartridge body is slidably installed in the protective sleeve, and the filter cartridge body is arranged corresponding to the installation groove; a limiting piece is arranged, one end of the limiting piece is limited with the sampling cylinder, and the other end of the limiting piece is adapted to abut against the filter cartridge body; a slot is arranged on the side wall of the protective sleeve, and the limiting piece is slidably arranged in the slot. The installation groove is arranged on the side wall of the sampling cylinder, which is used for installing or taking out the filter cartridge body from the sampling cylinder, and the protective sleeve is arranged to protect the filter cartridge body during sampling operation. When the filter cartridge body is installed and disassembled, the operation is performed from the side of the sampling cylinder, which simplifies the installation and disassembly difficulty of the filter cartridge body, and can effectively reduce the experimental error caused by the damage and surface peeling of the filter cartridge.

Description

Technical Field

[0001] This invention relates to the field of smoke and dust sampling equipment technology, and specifically to a smoke and dust sampling device. Background Technology

[0002] The flue gas sampling gun is used to sample flue gas and obtain its composition and concentration. It features a condenser filter to condense moisture and remove impurities from the flue gas. Suitable for sampling flue gas from all types of equipment, the gun ranges in length from 170mm to 2000mm and can withstand temperatures up to 1800℃. During sampling, a sampling nozzle and a forward-curved tube are installed at the gun head. Driven by a pump, the flue gas is drawn into the filter cartridge, achieving filtration and collection of flue gas particles.

[0003] In existing flue gas sampling guns, the front-end filter cartridge is fitted to the inner wall of the sampling cylinder and fixed inside the sampling gun under the pressure of the sampling head. Since the flue is mostly a high-temperature, negative-pressure environment, the sampling head needs to be secured to the sampling gun head via a threaded connection. Furthermore, the temperature of the gun head after sampling exceeds 100°C, making filter cartridge replacement difficult. Moreover, the filter cartridge is made of fiberglass, which naturally contains some moisture. After evaporation in the high-temperature environment of the flue, the filter cartridge easily adheres to the inner wall of the sampling cylinder. After sampling, it often needs to be removed using tweezers or other tools, affecting the efficiency of filter cartridge replacement. Additionally, the tips of the tweezers can easily damage the filter cartridge, causing surface peeling and resulting in significant deviations in the weighing data. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defect of the difficulty in replacing the filter cartridge at the front end of the flue gas sampling gun in the prior art, thereby providing a flue gas sampling device.

[0005] To solve the above-mentioned technical problems, the present invention provides a flue gas sampling device, comprising:

[0006] The sampling tube has an installation groove running through its side wall;

[0007] A protective sleeve is installed inside the sampling tube. An elastic reset component is provided between the protective sleeve and the bottom of the sampling tube. The filter tube body is slidably installed inside the protective sleeve, and the filter tube body is correspondingly set with the mounting groove.

[0008] The limiting component has one end that cooperates with the sampling cylinder for limiting, and the other end that is adapted to abut against the filter cylinder body for limiting. A relief groove is provided on the side wall of the protective sleeve, and the limiting component slides with the relief groove.

[0009] The protective sleeve has a first state in which it engages with the inlet end of the sampling tube under the elastic force of the elastic reset member to connect the filter cartridge body with the inlet of the sampling tube, and a second state in which it moves toward the bottom of the sampling tube against the elastic force of the elastic reset member to move the filter cartridge body out of the protective sleeve under the action of the limiting member.

[0010] Optionally, a limiting groove is provided on the inner wall of the sampling tube, and the limiting component slides in conjunction with the limiting groove.

[0011] Optionally, the limiting groove extends along the axial direction of the sampling cylinder.

[0012] Optionally, an operating element is provided on the outer wall of the protective sleeve, and an operating groove is provided through the side wall of the sampling tube, with the operating element and the operating groove slidingly engaged.

[0013] Optionally, the operating groove includes a longitudinal section and a circumferential section. The longitudinal section extends along the axial direction of the sampling tube, and the circumferential section is arranged along the circumference of the sampling tube. The circumferential section is located at one end of the longitudinal section near the bottom of the sampling tube, and the included angle between the circumferential section and the longitudinal section is not greater than 90°.

[0014] Optionally, a dustproof sleeve is slidably fitted outside the sampling tube, and the length of the dustproof sleeve is not less than the length of the mounting groove.

[0015] Optionally, the dustproof sleeve is fixedly connected to the protective sleeve. When the protective sleeve is in the first state, the dustproof sleeve is aligned with the mounting groove so that the mounting groove is completely covered by the dustproof sleeve. When the protective sleeve is in the second state, the dustproof sleeve is separated from the mounting groove so that the mounting groove is completely exposed.

[0016] Optionally, a sampling head is installed at the inlet end of the sampling tube, and a snap-fit ​​groove is reserved between the sampling head and the inner wall of the sampling tube. The filter tube body is adapted to snap-fit ​​and seal with the snap-fit ​​groove.

[0017] Optionally, a buffer seal is installed in the snap-fit ​​groove.

[0018] Optionally, the width of the mounting groove is not greater than the maximum diameter of the filter cartridge body.

[0019] The technical solution of this invention has the following advantages:

[0020] 1. The flue gas sampling device provided by the present invention includes: a sampling cylinder having an installation groove through its side wall; a protective sleeve installed inside the sampling cylinder, an elastic reset member being provided between the protective sleeve and the bottom of the sampling cylinder, a filter cylinder body being slidably installed inside the protective sleeve, the filter cylinder body being correspondingly provided with the installation groove; a limiting member having one end cooperating with the sampling cylinder for limiting, and the other end being adapted to abut against and limit the filter cylinder body, a clearance groove being provided on the side wall of the protective sleeve, the limiting member being slidably cooperating with the clearance groove; the protective sleeve has a first state in which it cooperates with the inlet end of the sampling cylinder under the elastic force of the elastic reset member to connect the filter cylinder body with the inlet of the sampling cylinder, and a second state in which it moves towards the bottom of the sampling cylinder against the elastic force of the elastic reset member to move the filter cylinder body out of the protective sleeve under the action of the limiting member.

[0021] When using the flue gas sampling device, manually push the protective sleeve downwards to overcome the elastic force of the resilient reset element, causing the protective sleeve to misalign with the mounting slot. Insert the filter cartridge body into the mounting slot, release the protective sleeve, and allow it to be in its first state under the action of the resilient reset element. This allows the filter cartridge body to be installed at the inlet end of the sampling tube for subsequent sampling. After sampling, manually adjust the protective sleeve to the second state to remove the filter cartridge body from the mounting slot. The mounting slot on the side wall of the sampling tube allows for the installation or removal of the filter cartridge body from the tube, while the protective sleeve protects the filter cartridge body during sampling. Installation and removal of the filter cartridge body are performed from the side of the sampling tube, making the operation convenient and quick, simplifying the installation and removal process, and effectively reducing experimental errors caused by filter cartridge breakage or surface peeling.

[0022] 2. The flue gas sampling device provided by the present invention has a limiting groove on the inner wall of the sampling cylinder, and a limiting member slides in the limiting groove. By setting the limiting groove and allowing the limiting member to slide in the limiting groove, when the protective sleeve is in the first state, the limiting groove abuts against the limiting member, causing the limiting member to drive the filter cylinder body to move upward together, so that the filter cylinder body automatically connects to the inlet of the sampling cylinder; when the protective sleeve is in the second state, the limiting groove abuts against the limiting member, restricting the limiting member from continuing to move downward, so that the limiting member can limit the filter cylinder body in a preset position, making it easy to remove the filter cylinder body from the mounting groove.

[0023] 3. The flue gas sampling device provided by the present invention includes an operating groove comprising a longitudinal portion and a circumferential portion. The longitudinal portion extends axially along the sampling cylinder, and the circumferential portion is arranged circumferentially along the sampling cylinder. The circumferential portion is located at one end of the longitudinal portion near the bottom of the sampling cylinder, and the included angle between the circumferential portion and the longitudinal portion is no greater than 90°. The protective sleeve is switched between a first state and a second state by an operating component. When the protective sleeve is in the second state, the operating component is rotated into the circumferential portion, and the circumferential portion of the operating groove limits the operating component, ensuring that the operating component and the protective sleeve are restricted to the current position, facilitating the installation or removal of the filter cartridge body. After the installation or removal of the filter cartridge body is completed, rotating the operating component to the longitudinal portion of the operating groove engages the limiting position of the operating component, allowing the protective sleeve to automatically return to the first state under the elastic force of the elastic reset component. Attached Figure Description

[0024] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of the flue gas sampling device with the protective sleeve in a first state, as provided in an embodiment of the present invention.

[0026] Figure 2 This is a schematic diagram of the structure of the flue gas sampling device with the protective sleeve in the first state, after the dustproof sleeve is hidden, according to an embodiment of the present invention.

[0027] Figure 3 This is a schematic diagram of the structure of the flue gas sampling device with the protective sleeve in the second state according to an embodiment of the present invention.

[0028] Figure 4 This is a schematic diagram of the structure of the flue gas sampling device with the protective sleeve in the second state, provided in an embodiment of the present invention, after the dustproof sleeve is hidden.

[0029] Figure 5 This is a schematic diagram of the sampling tube provided in an embodiment of the present invention.

[0030] Figure 6 This is a schematic diagram of the structure of the protective sleeve provided in an embodiment of the present invention.

[0031] Figure 7 This is a cross-sectional view of a flue gas sampling device with the protective sleeve in a first state, as provided in an embodiment of the present invention.

[0032] Explanation of reference numerals in the attached drawings: 1. Protective sleeve; 2. Operating lever; 3. Filter cartridge body; 4. Limiting component; 5. Limiting groove; 6. Operating groove; 7. Elastic reset component; 8. Sampling cylinder; 9. Dustproof sleeve; 10. Sampling head; 11. Washer; 12. Forward bend; 13. Mounting groove; 14. Clearance groove. Detailed Implementation

[0033] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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 the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0035] In the description of this invention, it should be noted that, unless otherwise explicitly 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 of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0036] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0037] Figures 1 to 7 The present embodiment shows a flue gas sampling device, including a sampling cylinder 8, a protective sleeve 1, a limiting member 4, and a dustproof sleeve.

[0038] An installation groove 13 is provided through the side wall of the sampling tube 8.

[0039] A protective sleeve 1 is installed inside a sampling cylinder 8. A metal or rubber spring, serving as an elastic reset element 7, is provided between the protective sleeve 1 and the bottom of the sampling cylinder 8. A filter cartridge body 3 is slidably installed inside the protective sleeve 1, and the filter cartridge body 3 is correspondingly positioned with the mounting groove 13. One end of a limiting element 4 engages with the sampling cylinder 8 for limiting, and the other end is adapted to abut against the filter cartridge body 3 for limiting. A clearance groove 14 is provided on the side wall of the protective sleeve 1, and the limiting element 4 slidably engages with the clearance groove 14. The protective sleeve 1 has a first state in which it engages with the inlet end of the sampling cylinder 8 under the elastic force of the elastic reset element 7 to connect the filter cartridge body 3 to the inlet of the sampling cylinder 8, and a second state in which it moves towards the bottom of the sampling cylinder 8 against the elastic force of the elastic reset element 7 to remove the filter cartridge body 3 from the protective sleeve 1 under the action of the limiting element 4. In this embodiment, the limiting element 4 is a long strip of rigid gasket. A limiting groove 5 is provided on the inner wall of the sampling tube 8. The limiting member 4 slides with the limiting groove 5, and the limiting groove 5 extends along the axial direction of the sampling tube 8.

[0040] An operating rod 2, serving as an operating component, is provided on the outer wall of the protective sleeve 1. An operating groove 6 is provided through the side wall of the sampling cylinder 8, and the operating rod 2 slides into the operating groove 6. The operating groove 6 includes a longitudinal portion and a circumferential portion. The longitudinal portion extends axially along the sampling cylinder 8, and the circumferential portion is arranged circumferentially along the sampling cylinder 8. The circumferential portion is located at one end of the longitudinal portion near the bottom of the sampling cylinder 8, and the included angle between the circumferential portion and the longitudinal portion is no greater than 90°. In this embodiment, to facilitate the shaping of the circumferential portion, the circumferential portion and the longitudinal portion form a 90° angle.

[0041] A dustproof sleeve 9 is slidably fitted onto the outside of the sampling tube 8. The length of the dustproof sleeve 9 is not less than the length of the mounting groove 13. In this embodiment, the length of the operating groove 6 is greater than the length of the mounting groove 13, and the top of the mounting groove 13 is lower than the top of the operating groove 6, while the bottom of the mounting groove 13 is higher than the bottom of the operating groove 6. To prevent dust from entering the sampling tube 8 from the mounting groove 13 or the operating groove 6, the length of the dustproof sleeve 9 is not less than the length of the operating groove 6. In other embodiments, if the top of the operating groove 6 is lower than the height of the mounting groove 13, then the length of the dustproof sleeve 9 is not less than the length from the bottom of the operating groove 6 to the top of the mounting groove 13. The dustproof sleeve 9 is fixedly connected to the protective sleeve 1. When the protective sleeve 1 is in the first state, the dustproof sleeve 9 is aligned with the mounting groove 13 so that the mounting groove 13 is completely covered by the dustproof sleeve 9. When the protective sleeve 1 is in the second state, the dustproof sleeve 9 is separated from the mounting groove 13 so that the mounting groove 13 is completely exposed.

[0042] A sampling head 10 is installed at the inlet end of the sampling cylinder 8. A snap-fit ​​groove is reserved between the sampling head 10 and the inner wall of the sampling cylinder 8, and the filter cylinder body 3 is adapted to snap-fit ​​and seal with the snap-fit ​​groove. A forward-curved tube 12 is installed through the sampling head 10 for extending into the flue to collect flue gas. A rubber gasket 11 is installed in the snap-fit ​​groove as a buffer seal. The width of the mounting groove 13 is not greater than the maximum diameter of the filter cylinder body 3, so as not to affect the entry and exit of the filter cylinder body 3, and to prevent the filter cylinder body 3 from tilting naturally and spilling samples during operation.

[0043] Preparation and assembly process:

[0044] An operating groove 6 and an installation groove 13 are mechanically cut into the outer surface of the sampling cylinder 8. The operating groove 6 serves as the running track for the operating lever 2. When the operating lever 2 reaches the bottom, it engages with the transverse groove to prevent the protective sleeve 1 from springing back during the loading and unloading of the filter cylinder body 3. The width of the installation groove 13 is slightly smaller than the maximum diameter of the filter cylinder body 3. This ensures that the filter cylinder body 3 can move in and out without affecting its movement, and also prevents the filter cylinder body 3 from tipping over and spilling samples during operation. A limiting groove 5 is cut into the inner surface of the sampling cylinder 8, serving as the running track for the limiting component 4, restricting the limiting component 4 to slide only up and down. At its highest position, it supports the filter cylinder body 3 to ensure a tight fit between the filter cylinder opening and the bottom frustum of the sampling head 10. At its lowest position, it is flush with the bottom of the installation groove 13, facilitating the loading and unloading of the filter cylinder.

[0045] A clearance groove 14 is mechanically cut into the outer surface of the protective sleeve 1. A spring is first installed inside the sampling cylinder 8, then the sleeve is inserted into the sampling cylinder 8 with the clearance groove 14 facing upwards. When the operating rod 2 is at the top of the operating groove 6, the clearance groove 14 pushes the limiting member 4 to its highest point. As the operating rod 2 is pulled down, the limiting member 4 descends with the clearance groove 14 until it reaches the bottom of the limiting groove 5. At this point, the limiting member 4 disengages from the clearance groove 14, and the operating rod 2 can then rotate into the transverse groove of the operating groove 6. Simultaneously, the protective sleeve 1 is designed with a diameter slightly larger than the filter cylinder diameter, which serves as a guide, ensuring accurate alignment of the filter cylinder opening with the bottom frustum of the sampling head 10.

[0046] The operating lever 2 passes through the dustproof sleeve 9 and is welded to the protective sleeve 1. The dustproof sleeve 9 and the operating lever 2 move together. The dustproof sleeve 9 mainly ensures the airtightness of the sampling cylinder 8 and prevents dust from entering the sampling cylinder 8 from the trough, contaminating the outer wall of the filter cylinder and affecting weighing. In this embodiment, the dustproof sleeve 9 is made of polytetrafluoroethylene.

[0047] The gasket 11, acting as a buffer seal, effectively reduces the impact between the protective sleeve 1 and the sampling head 10 during the rebound process, while ensuring the airtightness of the sampling head 10. Finally, the forward bend 12 and the sampling nozzle are fixed to the top of the sampling head 10, which is still fixed by a threaded connection. If necessary, it can be disassembled to inspect or clean the inside of the sampling tube 8.

[0048] During use, manually pull the operating rod 2 to the circumferential part at the bottom of the operating groove 6, insert the filter cartridge body 3 into the mounting groove 13, and let the bottom of the filter cartridge body 3 rest on the limiting member 4. Then manually return the operating rod 2 to its original position. Under the support of the limiting member 4 and the guidance of the protective sleeve 1, the filter cartridge body 3 is accurately aligned with the bottom frustum of the sampling head 10 and fits tightly. After sampling, manually pull the operating rod 2 to the circumferential part at the bottom of the operating groove 6. During this process, because the filter cartridge body 3 adheres to the inner wall of the protective sleeve 1 after sampling, the filter cartridge body 3 will move downward together with the protective sleeve 1 and the limiting member 4. When the limiting member 4 reaches the bottom, it prevents the filter cartridge body 3 from moving downward and separates from the wall of the protective sleeve 1. At this time, the filter cartridge body 3 can be removed from the mounting groove 13.

[0049] This embodiment provides a flue gas sampling gun with a quick-change filter cartridge, which solves the defects of traditional flue gas sampling guns such as difficulty in changing filter cartridges, low efficiency, and easy damage during replacement. It also features strong operability, simple structure, and low modification cost.

[0050] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A flue gas sampling device, characterized in that, include: The sampling tube (8) has an installation groove (13) through its side wall; A protective sleeve (1) is installed inside the sampling tube (8). An elastic reset member (7) is provided between the protective sleeve (1) and the bottom of the sampling tube (8). A filter body (3) is slidably installed inside the protective sleeve (1). The filter body (3) is correspondingly provided with the mounting groove (13). The limiting member (4) has one end that cooperates with the sampling tube (8) for limiting, and the other end that is adapted to abut against the filter tube body (3) for limiting. A relief groove (14) is provided on the side wall of the protective sleeve (1). The limiting member (4) and the relief groove (14) are slidably engaged. The protective sleeve (1) has a first state in which it engages with the inlet end of the sampling tube (8) under the elastic force of the elastic reset member (7) so that the filter body (3) is connected to the inlet of the sampling tube (8), and a second state in which it moves toward the bottom of the sampling tube (8) against the elastic force of the elastic reset member (7) so that the filter body (3) is moved out of the protective sleeve (1) under the action of the limiting member (4). An operating component is provided on the outer wall of the protective sleeve (1), and an operating groove (6) is provided through the side wall of the sampling cylinder (8). The operating component is slidably engaged with the operating groove (6). The operating groove (6) includes a longitudinal part and a circumferential part. The longitudinal part extends along the axial direction of the sampling cylinder (8), and the circumferential part is arranged along the circumference of the sampling cylinder (8). The circumferential part is located at one end of the longitudinal part near the bottom of the sampling cylinder (8), and the included angle between the circumferential part and the longitudinal part is not greater than 90°. A limiting groove (5) is provided on the inner wall of the sampling tube (8), and the limiting member (4) slides in cooperation with the limiting groove (5); The limiting groove (5) extends along the axial direction of the sampling cylinder (8).

2. The flue gas sampling device according to claim 1, characterized in that, The sampling tube (8) is slidably fitted with a dustproof sleeve (9), and the length of the dustproof sleeve (9) is not less than the length of the mounting groove (13).

3. The flue gas sampling device according to claim 2, characterized in that, The dustproof sleeve (9) is fixedly connected to the protective sleeve (1). When the protective sleeve (1) is in the first state, the dustproof sleeve (9) is aligned with the mounting groove (13) so that the mounting groove (13) is completely covered by the dustproof sleeve (9). When the protective sleeve (1) is in the second state, the dustproof sleeve (9) is separated from the mounting groove (13) so that the mounting groove (13) is completely exposed.

4. The flue gas sampling device according to any one of claims 1 to 3, characterized in that, The sampling head (10) is installed at the inlet end of the sampling tube (8). A snap-fit ​​groove is reserved between the sampling head (10) and the inner wall of the sampling tube (8). The filter body (3) is adapted to snap-fit ​​and seal with the snap-fit ​​groove.

5. The flue gas sampling device according to claim 4, characterized in that, A buffer seal is installed inside the snap-fit ​​groove.

6. The flue gas sampling device according to any one of claims 1 to 3, characterized in that, The width of the mounting groove (13) is not greater than the maximum diameter of the filter cartridge body (3).

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