Anti-blocking mechanism and hearth negative pressure sampling device
By installing a filter cartridge and rotating rod filter assembly inside the sampling tube, combined with high-temperature resistant materials and a plug structure, the problems of clogging and impurity interference in the furnace sampling device are solved, achieving stable sampling and accurate measurement under high-temperature conditions.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 中煤哈密发电有限公司
- Filing Date
- 2025-04-21
- Publication Date
- 2026-07-07
AI Technical Summary
Existing furnace sampling devices are prone to clogging in high-temperature and high-dust environments, affecting the accuracy of negative pressure measurement and the long-term stability of the equipment. Furthermore, impurities in the sampled material can affect the detection structure.
The sampling tube is equipped with a filter cartridge and a rotating rod, which, together with the protective cover, filter the material to prevent large particles from entering. The outer tube and connecting tube are made of high-temperature resistant Inconel 625 material and are equipped with plugs and inner lining tubes for easy disassembly and dust removal.
It effectively prevents impurities and particles in the sampling tube from affecting the detection, ensures gas filtration and rotation to remove large particles, improves the stability and measurement accuracy of the sampling device, and is suitable for high-temperature environments.
Smart Images
Figure CN224471341U_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of furnace detection technology, specifically an anti-blocking mechanism and a furnace negative pressure sampling device. Background Technology
[0002] Negative pressure monitoring is a crucial aspect of ensuring safe operation during industrial furnace operation. However, the high temperature and dust environment inside the furnace can easily lead to clogging of the sampling tube, affecting the accuracy of negative pressure measurements and the long-term stability of the equipment. Therefore, developing a furnace negative pressure sampling device with anti-clogging capabilities is of significant practical importance.
[0003] For example, application CN220772687U discloses an anti-clogging mechanism and a furnace negative pressure sampling device, including a pipeline unit comprising an outer pipe and an inner lining pipe; a sealing unit comprising a plug, a compression spring, a piston, and a striking assembly; and a sampling unit comprising a sampling gourd and a sampling tube disposed on one side of the sampling gourd. The beneficial effects of this utility model are that by setting the striking assembly, the sampling tube, under the influence of airflow during sampling, can drive the striking hammer to continuously strike the pipe wall, preventing fly ash from accumulating inside the pipe wall. It also allows for the removal of the inner lining pipe for cleaning or replacement to clear blockages. These two methods address different degrees of blockage, greatly improving work efficiency. Furthermore, by coating the outside of the sampling device with a leak-proof coating and covering it with sealant, the entire sampling device is guaranteed to be leak-free, ensuring accurate measurements. This coating can be maintained until the unit is shut down or undergoes maintenance for replacement, improving the safety and stability of the unit.
[0004] However, during the implementation of this application, it was discovered that the sampling tube inlet of the application was not equipped with a filter structure component, which caused impurities to be mixed in with the sample, thus affecting the detection structure. Utility Model Content
[0005] The purpose of this application is to provide an anti-clogging mechanism and a furnace negative pressure sampling device to solve the sampling and filtration problems mentioned above.
[0006] The technical solution adopted in this application is as follows: a sampling tube is connected to the surface of the outer tube through a connecting tube, a sampling gourd is provided at the top of the sampling tube, and a filter element is provided at the bottom of the inner part of the sampling tube. A rotating rod is provided on the surface of the filter element, and a fan blade is provided on one end of the rotating rod. The protective cover is fixedly installed on the surface of the filter element, and the fan blade is located inside the protective cover.
[0007] By adopting the above technical solution, a filter assembly can be installed inside the sampling tube to prevent large impurity particles from entering the sampling tube or sampling hoist, thus affecting the detection structure. When the sampling tube and sampling hoist are performing sampling, the gas will be filtered through the filter cartridge. At the same time, the rotating rod and protective cover can make the gas rotate, throwing large particles away from the sampling tube. The protective cover covers the outside of the rotating blades to guide the airflow and protect the rotating blades.
[0008] As a further description of the above technical solution, a plug is movably provided at one end of the outer tube, and the inner wall of the plug is provided with internal threads, and the surface of the connection between the outer tube and the plug is provided with external threads.
[0009] By adopting the above technical solution and using the external and internal threaded connections, the outer tube and the plug can be tightly connected and fixed, while also facilitating the disassembly of the structure.
[0010] As a further description of the above technical solution, the outer tube is provided with an inner liner tube, and one end of the inner liner tube is provided with a stop.
[0011] By adopting the above technical solution, setting an inner liner and baffle inside the outer tube can facilitate gas sampling and also serve as a dust removal function.
[0012] As a further description of the above technical solution, a compression spring is fixedly connected to the inner surface of the plug, a piston is provided at the other end of the compression spring, and a through hole is opened on the surface of the plug.
[0013] By adopting the above technical solution, when the internal airflow pressure changes, the piston can be driven to move back and forth with the assistance of the compression spring, thereby allowing the gas to be discharged through the through hole.
[0014] As a further description of the above technical solution, a striking rod is provided above the surface through hole of the plug, and a spring is provided at the intermediate connection between the striking rod and the plug.
[0015] By adopting the above technical solution, when gas is ejected from the inside of the through hole, the spring can drive the striking rod to strike the surface of the pipe, thereby cleaning the inside.
[0016] As a further description of the above technical solution, the outer tube, connecting tube and sampling tube are made of high-temperature resistant material Inconel 625.
[0017] By adopting the above technical solution, the outer tube, connecting tube and sampling tube made of high-temperature resistant material Inconel 625 have good oxidation resistance and hot corrosion resistance, and are suitable for high-temperature environments inside the furnace.
[0018] In summary, due to the adoption of the above technical solution, the beneficial effects of this application are:
[0019] In this application, by setting a filter assembly inside the sampling tube, large impurity particles can be prevented from entering the sampling tube or sampling hoist, thereby affecting the detection structure. When the sampling tube and sampling hoist are performing sampling, the gas will be filtered through the filter cartridge. At the same time, the rotating rod and protective cover can make the gas rotate, throwing large particles away from the sampling tube. The protective cover covers the outside of the rotating blades to guide the airflow and protect the rotating blades. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the main structure of the anti-blocking mechanism and furnace negative pressure sampling device of this application;
[0021] Figure 2 This is a schematic diagram of the internal structure of the connecting pipe in this application;
[0022] Figure 3 This is a schematic diagram of the internal structure of the sampling tube in this application;
[0023] Figure 4 This is a schematic diagram of the internal structure of the plug in this application.
[0024] The markings in the diagram are: 1. Outer tube; 2. Connecting tube; 3. Sampling tube; 4. Sampling gourd; 5. Plug; 6. Filter cartridge; 7. Rotating rod; 8. Protective cover; 9. Fan blade; 10. Inner liner tube; 11. Stop block; 12. External thread; 13. Internal thread; 14. Compression spring; 15. Piston; 16. Striking rod; 17. Through hole. Detailed Implementation
[0025] 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.
[0026] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation of this utility model; the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In addition, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.
[0027] Example:
[0028] Reference Figure 1-3 The outer tube 1 is connected to a sampling tube 3 via a connecting tube 2. A sampling gourd 4 is installed at the top of the sampling tube 3, and a filter cartridge 6 is installed at the bottom of the inner part of the sampling tube 3. A rotating rod 7 is installed on the surface of the filter cartridge 6, and a fan blade 9 is installed on one end of the rotating rod 7. A protective cover 8 is fixedly installed on the surface of the filter cartridge 6, and the fan blade 9 is installed inside the protective cover 8. By installing a filter assembly inside the sampling tube 3, large impurity particles can be prevented from entering the sampling tube 3 or the sampling gourd 4, thus affecting the detection structure. When the sampling tube 3 and the sampling gourd 4 are sampling, the gas will be filtered through the filter cartridge 6. At the same time, the rotating rod 7 and the protective cover 8 can make the gas rotate, throwing large particles away from the sampling tube. The protective cover 8 covers the outside of the rotating blade and is used to guide the airflow and protect the rotating blade.
[0029] Reference Figure 1-4 One end of the outer tube 1 is movably provided with a plug 5, and the inner wall of the plug 5 is provided with an internal thread 13. The surface of the connection between the outer tube 1 and the plug 5 is provided with an external thread 12. The external thread 12 and the internal thread 13 are threadedly connected, so that the outer tube 1 and the plug 5 can be tightly connected and fixed, and the structure can also be easily disassembled.
[0030] Reference Figure 1-3 The outer tube 1 is provided with an inner liner tube 10, and a baffle 11 is provided at one end of the inner liner tube 10. The inner liner tube 10 and the baffle 11 inside the outer tube 1 can facilitate gas sampling and also play a role in dust removal.
[0031] Reference Figure 1-4A compression spring 14 is fixedly connected to the inner surface of the plug 5. A piston 15 is provided at the other end of the compression spring 14, and a through hole 17 is provided on the surface of the plug 5. When the internal air pressure changes, the piston 15 can be driven to move back and forth with the assistance of the compression spring 14, so that the gas can be discharged through the through hole 17.
[0032] Reference Figure 1-4 A striking rod 16 is provided above the through hole 17 on the surface of the plug 5, and a spring is provided at the middle connection between the striking rod 16 and the plug 5. When gas is ejected from the inside of the through hole 17, the spring can drive the striking rod 16 to strike the surface of the pipe, thereby cleaning the inside.
[0033] Reference Figure 1 The outer tube 1, connecting tube 2 and sampling tube 3 are made of high-temperature resistant material Inconel 625. The outer tube 1, connecting tube 2 and sampling tube 3 made of high-temperature resistant material Inconel 625 have good oxidation resistance and hot corrosion resistance, and are suitable for the high-temperature environment inside the furnace.
[0034] The implementation principle of the anti-blocking mechanism and furnace negative pressure sampling device embodiment of this application is as follows:
[0035] By setting a filter assembly inside the sampling tube 3, large impurity particles can be prevented from entering the sampling tube 3 or the sampling gourd 4, thus affecting the detection structure. When the sampling tube 3 and the sampling gourd 4 are sampling, the gas will be filtered through the filter cartridge 6. At the same time, the rotating rod 7 and the protective cover 8 can make the gas rotate, throwing large particles away from the sampling tube. The protective cover 8 covers the outside of the rotating blades to guide the airflow and protect the rotating blades.
[0036] Finally, it should be noted that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model 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 utility model should be included within the protection scope of the present utility model.
Claims
1. A blockage prevention mechanism and a furnace negative pressure sampling device, comprising an outer tube (1) and a protective cover (8), characterized in that: The outer tube (1) is connected to a sampling tube (3) via a connecting tube (2). A sampling gourd (4) is provided at the top of the sampling tube (3), and a filter cartridge (6) is provided at the bottom of the inner part of the sampling tube (3). A rotating rod (7) is provided on the surface of the filter cartridge (6), and a fan blade (9) is provided on one end of the rotating rod (7). A protective cover (8) is fixedly provided on the surface of the filter cartridge (6), and the fan blade (9) is provided inside the protective cover (8).
2. The anti-blocking mechanism and furnace negative pressure sampling device as described in claim 1, characterized in that: One end of the outer tube (1) is movably provided with a plug (5), and the inner wall of the plug (5) is provided with an internal thread (13), and the surface of the connection between the outer tube (1) and the plug (5) is provided with an external thread (12).
3. The anti-blocking mechanism and furnace negative pressure sampling device as described in claim 1, characterized in that: The outer tube (1) is provided with an inner liner tube (10), and a stop (11) is provided at one end of the inner liner tube (10).
4. The anti-blocking mechanism and furnace negative pressure sampling device as described in claim 2, characterized in that: A compression spring (14) is fixedly connected to the inner surface of the plug (5), and a piston (15) is provided at the other end of the compression spring (14). A through hole (17) is provided on the surface of the plug (5).
5. The anti-blocking mechanism and furnace negative pressure sampling device as described in claim 2, characterized in that: A striking rod (16) is provided above the surface through hole (17) of the plug (5), and a spring is provided at the middle connection between the striking rod (16) and the plug (5).
6. The anti-blocking mechanism and furnace negative pressure sampling device as described in claim 1, characterized in that: The outer tube (1), connecting tube (2) and sampling tube (3) are made of high-temperature resistant material Inconel 625.