Hearth pressure tapping device of gas heat treatment furnace

Abstract

The utility model discloses a pressure tapping device for a hearth of a gas heat treatment furnace, which belongs to the field of hearth pressure tapping and comprises a pressure tapping pipe, a filter component arranged at the top end of the pressure tapping pipe, a measuring component arranged at the top end of the filter component, and an adjusting component arranged at the top end of the measuring component. The key point of the technical scheme is that the handle rotates to drive the threaded sleeve to be in threaded fit with the lead screw, the position of the measuring assembly is flexibly adjusted, diversified requirements of different hearth structures and measuring scenes for measuring point positions can be met, meanwhile, a buffer structure composed of a buffer spring and a buffer net effectively deals with pressure fluctuation or impact, and the measuring accuracy is improved. The filtering assembly is internally provided with a multi-layer filtering system composed of a large-hole filtering net, a middle-hole filtering net and a micro-hole filtering net, gas impurities can be comprehensively filtered, the phenomenon that the impurities interfere with pressure measurement is avoided, the pressure taking pipe and the filtering assembly are in threaded connection, and the filtering assembly and the measuring assembly are in threaded connection, so that the device is convenient to maintain, overhaul or replace, disassemble and store.

Description

Technical Field

[0001] This utility model relates to the field of furnace pressure tapping, and in particular to a furnace pressure tapping device for a gas-fired heat treatment furnace. Background Technology

[0002] During the operation of a gas-fired heat treatment furnace, accurate measurement of the pressure inside the furnace is crucial to ensuring the stability of the heat treatment process and product quality. However, existing furnace pressure tapping devices cannot effectively filter impurities in the gas. These impurities may enter the measuring components, affecting the accuracy of the pressure sensor, or even causing damage to the pressure sensor, increasing equipment maintenance costs and downtime.

[0003] Chinese Patent Application Publication No. CN202221031860.8 discloses a pressure tapping device for a gas-fired heat treatment furnace. In this design, the high-temperature gas in the furnace is cooled by a second galvanized pressure tapping pipe before entering a buffer channel. However, the pressure tapping device mentioned in the patent mainly transports the gas in the furnace through the second galvanized pressure tapping pipe, which consists of only a first pipe body and a second pipe body. Depending on the furnace structure and measurement requirements, the first and second pipe bodies are difficult to adjust accordingly. The first and second pipe bodies are not flexible enough during pressure tapping, which may affect the accuracy of the pressure measurement. Furthermore, this patented device is a single unit, making it inconvenient to disassemble and store, thus occupying storage space.

[0004] Therefore, we propose a pressure tapping device for the furnace chamber of a gas-fired heat treatment furnace. Utility Model Content

[0005] To overcome the shortcomings of existing technologies, the purpose of this utility model is to provide a pressure tapping device for a gas-fired heat treatment furnace. By rotating the handle, the screw sleeve and lead screw are engaged, allowing for flexible adjustment of the position of the measuring components. This adapts to the diverse needs of different furnace structures and measurement scenarios for the location of the measuring points. Meanwhile, the buffer structure composed of a buffer spring and a buffer mesh effectively copes with pressure fluctuations or impacts. Furthermore, the multi-layer filtration system within the filter assembly, consisting of large-pore, medium-pore, and micro-pore filters, comprehensively filters gas impurities, preventing impurities from interfering with pressure measurement. Additionally, the pressure tapping pipe and the filter assembly, as well as the filter assembly and the measuring components, are all connected by threads, facilitating the maintenance, repair, replacement, disassembly, and storage of the device.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0007] A pressure tapping device for a gas-fired heat treatment furnace includes a pressure tapping pipe, a filter assembly at the top of the pressure tapping pipe, a measuring assembly at the top of the filter assembly, and an adjusting assembly at the top of the measuring assembly. The adjusting assembly includes a handle, an outer sleeve fitted at the lower end of the handle, a threaded sleeve fixedly connected to the bottom end of the outer sleeve, a lead screw threadedly connected to the inner threaded sleeve, the lead screw extending through the top of the threaded sleeve into the interior of the handle, and the lead screw slidably connected to the handle. The bottom end of the lead screw is observed at the bottom end of the threaded sleeve. The measuring assembly includes a housing fixedly installed at the bottom end of the lead screw, a pressure sensor fixedly connected to the top of the inner end of the housing, a buffer mesh below the pressure sensor, the buffer mesh slidably connected to the side wall of the housing, and a pair of symmetrical buffer springs fixedly connected to the top of the buffer mesh, the tops of the buffer springs fixedly connected to the top of the inner end of the housing. The filter assembly includes a filter cylinder, inside which a microporous filter, a medium-pore filter, and a large-pore filter are fixedly connected sequentially from top to bottom.

[0008] By rotating the handle and utilizing the threaded connection between the screw sleeve and the lead screw, the up-and-down movement of the lead screw can be adjusted, thereby adjusting the position of the measuring component. The outer sleeve provides support for the handle, ensuring stability during rotation. The pressure sensor measures the pressure value inside the furnace. A buffer structure consisting of a buffer spring and a buffer mesh allows the buffer mesh to slide within the outer shell and the buffer spring to compress or extend during pressure fluctuations or impacts, thus buffering and protecting the pressure sensor and preventing damage from sudden impacts, improving measurement accuracy and stability. The gas entering from the pressure tapping pipe undergoes multi-layer filtration through microporous, medium-pore, and large-pore filters within the filter cartridge. The large-pore filter first filters larger particles, the medium-pore filter filters medium-sized particles, and the microporous filter filters smaller particles, ensuring the cleanliness of the gas entering the measuring component and preventing impurities from affecting the accuracy of pressure measurements and damaging components such as the pressure sensor.

[0009] Furthermore, a rotating ring is fixedly connected to the inner wall of the outer sleeve.

[0010] Furthermore, the outer wall of the handle is provided with a rotating groove adapted to the rotating ring, and the rotating groove is rotatably connected to the rotating ring.

[0011] Furthermore, an internally threaded ring is fixedly connected to the bottom end of the outer casing.

[0012] Furthermore, an externally threaded tube is fixedly connected to the top of the filter cartridge.

[0013] Furthermore, the bottom end of the filter cylinder is provided with a threaded groove.

[0014] Furthermore, the externally threaded tube is threadedly connected to the internally threaded ring.

[0015] Furthermore, the upper end of the pressure tapping tube is provided with a threaded protrusion, which is threadedly connected to the threaded groove.

[0016] In summary, this utility model has the following beneficial effects:

[0017] 1. Flexible and adjustable measurement position: By rotating the handle, the screw sleeve engages with the lead screw thread, which can easily move the lead screw up and down, thereby flexibly adjusting the position of the measuring component. This can adapt to the diverse needs of different furnace structures and measurement scenarios for the position of the measuring point.

[0018] 2. High measurement stability and accuracy: On the one hand, the buffer structure composed of buffer spring and buffer mesh effectively copes with pressure fluctuations or impacts, prevents the pressure sensor from being damaged by instantaneous impacts, and ensures stable and reliable pressure measurement data; on the other hand, the multi-layer filtration system composed of large-pore filter, medium-pore filter and micro-pore filter in the filter assembly can comprehensively filter gas impurities, avoid impurities interfering with pressure measurement, and ensure measurement accuracy.

[0019] 3. Convenient maintenance: The pressure tapping tube and the filter assembly, as well as the filter assembly and the measuring assembly, are all connected by threads. This detachable connection design allows operators to quickly and easily disassemble and assemble the device when it is being maintained, repaired, or replaced. This greatly improves maintenance efficiency, reduces maintenance costs, and facilitates disassembly and storage, thus reducing the space occupied during storage. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure in this embodiment;

[0021] Figure 2 This is a schematic diagram of the overall disassembled structure in this embodiment;

[0022] Figure 3 This is a schematic diagram of the adjustment component in this embodiment;

[0023] Figure 4 This is a schematic diagram of the measurement component in this embodiment;

[0024] Figure 5 This is a schematic diagram of the structure of the filtering component in this embodiment;

[0025] Figure 6 This is a schematic diagram of the pressure tapping tube in this embodiment.

[0026] In the diagram, 1 is the adjustment component; 2 is the measuring component; 3 is the filtering component; 4 is the pressure tapping tube; 101 is the handle; 102 is the outer sleeve; 103 is the threaded sleeve; 104 is the rotating ring; 105 is the lead screw; 201 is the outer shell; 202 is the internal threaded ring; 203 is the pressure sensor; 204 is the buffer spring; 205 is the buffer mesh; 301 is the external threaded tube; 302 is the filter cylinder; 303 is the microporous filter screen; 304 is the medium-pore filter screen; and 305 is the large-pore filter screen. Detailed Implementation

[0027] The present invention will be further described in detail below with reference to the accompanying drawings.

[0028] Identical parts are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings, while the terms "bottom surface," "top surface," "inner," and "outer" refer to directions toward or away from the geometric center of a specific part, respectively.

[0029] Reference Figures 1-6 As shown, a pressure tapping device for a gas-fired heat treatment furnace according to a preferred embodiment of this utility model includes a pressure tapping pipe 4, a filter assembly 3 at the top of the pressure tapping pipe 4, a measuring assembly 2 at the top of the filter assembly 3, and an adjusting assembly 1 at the top of the measuring assembly 2. The adjusting assembly 1 includes a handle 101, an outer sleeve 102 fitted onto the lower end of the handle 101, a threaded sleeve 103 fixedly connected to the bottom end of the outer sleeve 102, a lead screw 105 threadedly connected to the inside of the threaded sleeve 103, the top end of the lead screw 105 extending through the top end of the threaded sleeve 103 into the interior of the handle 101, and the lead screw 105 slidably connected to the handle 101. Observe the bottom end of the screw sleeve 103; the measuring component 2 includes a housing 201 fixedly installed at the bottom end of the lead screw 105, a pressure sensor 203 fixedly connected to the top end inside the housing 201, a buffer screen 205 is provided below the pressure sensor 203, the buffer screen 205 is slidably connected to the side wall of the housing 201, a pair of symmetrical buffer springs 204 are fixedly connected to the top end of the buffer screen 205, and the top end of the buffer springs 204 is fixedly connected to the top end inside the housing 201; the filtering component 3 includes a filter cylinder 302, and a microporous filter 303, a medium-pore filter 304, and a large-pore filter 305 are fixedly connected from top to bottom inside the filter cylinder 302;

[0030] By rotating the handle 101, the threaded connection between the screw sleeve 103 and the lead screw 105 allows for the up-and-down movement adjustment of the lead screw 105, thereby adjusting the position of the measuring component 2. The outer sleeve 102 provides a certain supporting function for the handle 101, ensuring the stability of the handle 101 during rotation. The pressure sensor 203 is used to measure the pressure value inside the furnace. The buffer spring 204 and the buffer mesh 205 form a buffer structure. When there is pressure fluctuation or impact, the buffer mesh 205 can slide inside the outer shell 201, and the buffer spring 204 can be compressed or extended, providing buffer protection. The function of pressure sensor 203 is to prevent it from being damaged by instantaneous impact, thereby improving the accuracy and stability of the measurement. The gas entering from the pressure tapping pipe 4 is filtered in multiple layers through the microporous filter 303, medium-pore filter 304, and large-pore filter 305 in the filter cylinder 302. The large-pore filter 305 filters out larger particulate impurities, the medium-pore filter 304 filters out medium-sized particulate impurities, and the microporous filter 303 filters out smaller particulate impurities, ensuring that the gas entering the measuring component 2 is clean and preventing impurities from affecting the accuracy of pressure measurement and damaging components such as pressure sensor 203.

[0031] A rotating ring 104 is fixedly connected to the inner wall of the outer sleeve 102;

[0032] The rotating ring 104 is fixed to the inner wall of the outer sleeve 102, so that the handle 101 can rotate more smoothly relative to the outer sleeve 102, improving the convenience of adjustment operation.

[0033] The outer wall of the handle 101 is provided with a rotating groove adapted to the rotating ring 104, and the rotating groove is rotatably connected to the rotating ring 104;

[0034] The rotating groove is rotatably connected to the rotating ring 104, so that when the adjusting screw 105 is rotated, the handle 101 can rotate stably relative to the outer sleeve 102, ensuring the reliability of the adjustment operation, and also playing a certain limiting and guiding role in the rotation of the handle 101.

[0035] An internally threaded ring 202 is fixedly connected to the bottom end of the outer casing 201;

[0036] The internal threaded ring 202 is fixed to the bottom of the housing 201, enabling a detachable connection between the measuring component 2 and the filter component 3, facilitating installation, disassembly, and maintenance.

[0037] The top of the filter cartridge is fixedly connected to an external threaded tube 301;

[0038] The external threaded tube 301 is fixed to the top of the filter cartridge, realizing a stable connection between the filter assembly 3 and the measuring assembly 2, and also facilitating the disassembly and replacement of the filter assembly 3.

[0039] The bottom end of the filter cartridge is provided with a threaded groove;

[0040] The threaded groove at the bottom of the filter cartridge is used to enable the detachable connection between the filter assembly 3 and the pressure tapping tube 4, which facilitates installation and disassembly, and makes it easy to maintain and repair the entire pressure tapping device.

[0041] The externally threaded pipe 301 is threadedly connected to the internally threaded ring 202;

[0042] The filter assembly 3 and the measuring assembly 2 are securely connected by the threaded connection between the external threaded tube 301 and the internal threaded ring 202, ensuring that the gas can smoothly enter the measuring assembly 2 for pressure measurement after passing through the filter assembly 3, and also facilitating the disassembly of both when needed.

[0043] The upper end of the pressure tapping tube 4 is provided with a threaded protrusion, which is threadedly connected to the threaded groove.

[0044] The threaded protrusion at the upper end of the pressure tapping pipe 4 is threadedly connected to the threaded groove at the bottom end of the filter cartridge, thereby achieving a stable connection between the pressure tapping pipe 4 and the filter assembly 3. This allows the gas in the furnace to enter the filter assembly 3 through the pressure tapping pipe 4 for filtration, while also facilitating disassembly and installation and promoting the maintenance of the pressure tapping device.

[0045] Specific implementation process: First, install the pressure tapping pipe 4 at a suitable position in the furnace chamber of the gas-fired heat treatment furnace, ensuring that the opening of the pressure tapping pipe 4 can accurately collect gas pressure information in the furnace chamber. The threaded protrusion at the upper end of the pressure tapping pipe 4 is tightly screwed into the threaded groove at the bottom end of the filter cylinder 302, completing the connection between the pressure tapping pipe 4 and the filter assembly 3, ensuring that the gas can smoothly enter the filter assembly 3 from the furnace chamber through the pressure tapping pipe 4. Next, connect the filter assembly 3 to the measuring assembly 2. Screw the external threaded pipe 301 at the top of the filter cylinder 302 into the internal threaded ring 202 at the bottom end of the outer shell 201, so that the two... The connection is secure, allowing the clean gas filtered through the multiple layers of filter assembly 3 to smoothly enter the measuring assembly 2. Then, the measuring assembly 2 and the adjusting assembly 1 are assembled. The bottom end of the lead screw 105 is fixedly connected to the top end of the outer shell 201 of the measuring assembly 2, enabling the adjusting assembly 1 to adjust the position of the measuring assembly 2. At this time, the lower end of the handle 101 is fitted inside the outer sleeve 102, and the rotating ring 104 engages with the rotating groove on the outer wall of the handle 101, ensuring smooth rotation of the handle 101. When furnace pressure needs to be measured, the operator rotates the handle. The threaded sleeve 103 is threadedly connected to the lead screw 105, and the lead screw 105 is slidably connected to the handle 101. The lead screw 105 extends and retracts within the handle 101 according to the rotation of the threaded sleeve 103, thereby adjusting the position distance of the measuring component 2 to adapt to different measurement needs. The gas in the furnace enters the filter component 3 through the pressure tapping pipe 4, passing sequentially through the large-pore filter 305, the medium-pore filter 304, and the micropore filter 303, gradually filtering out particulate impurities from large to small pores to ensure the cleanliness of the gas entering the measuring component 2. The clean gas... The gas enters the housing 201 of the measuring component 2 and acts on the buffer mesh 205. Under normal pressure conditions, the gas pressure smoothly passes through the buffer mesh 205 and acts on the pressure sensor 203. The pressure sensor 203 accurately measures and outputs the pressure value inside the furnace. If pressure fluctuations or impacts occur, the buffer mesh 205 slides along the side wall of the housing 201 under the impact of the gas, compressing or stretching the buffer spring 204. The deformation of the buffer spring 204 plays a buffering role, protecting the pressure sensor 203 from instantaneous impact damage and ensuring the accuracy and stability of pressure measurement.

[0046] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A pressure tapping device for the furnace chamber of a gas-fired heat treatment furnace, characterized in that: It includes a pressure tapping tube (4), a filter assembly (3) is provided at the top end of the pressure tapping tube (4), a measuring assembly (2) is provided at the top end of the filter assembly (3), and an adjusting assembly (1) is provided at the top end of the measuring assembly (2). The adjustment assembly (1) includes a handle (101), an outer sleeve (102) is fitted at the lower end of the handle (101), a threaded sleeve (103) is fixedly connected to the bottom end of the outer sleeve (102), a lead screw (105) is threadedly connected to the inside of the threaded sleeve (103), the top end of the lead screw (105) extends through the top end of the threaded sleeve (103) to the inside of the handle (101), the lead screw (105) is slidably connected to the handle (101), and the bottom end of the lead screw (105) is observed at the bottom end of the threaded sleeve (103); The measuring component (2) includes a housing (201) fixedly installed at the bottom end of the lead screw (105). A pressure sensor (203) is fixedly connected to the top end inside the housing (201). A buffer net (205) is provided below the pressure sensor (203). The buffer net (205) is slidably connected to the side wall of the housing (201). A pair of symmetrical buffer springs (204) are fixedly connected to the top end of the buffer net (205). The top end of the buffer springs (204) is fixedly connected to the top end inside the housing (201). The filter assembly (3) includes a filter cylinder (302), and a microporous filter (303), a medium-pore filter (304), and a large-pore filter (305) are fixedly connected inside the filter cylinder (302) from top to bottom.

2. The furnace pressure tapping device for a gas-fired heat treatment furnace according to claim 1, characterized in that: A rotating ring (104) is fixedly connected to the inner wall of the outer sleeve (102).

3. The furnace pressure tapping device for a gas-fired heat treatment furnace according to claim 1, characterized in that: The outer wall of the handle (101) is provided with a rotating groove adapted to the rotating ring (104), and the rotating groove is rotatably connected to the rotating ring (104).

4. The furnace pressure tapping device for a gas-fired heat treatment furnace according to claim 1, characterized in that: An internal threaded ring (202) is fixedly connected to the bottom end of the outer shell (201).

5. The furnace pressure tapping device for a gas-fired heat treatment furnace according to claim 1, characterized in that: The top end of the filter cartridge (302) is fixedly connected to an external threaded tube (301).

6. The furnace pressure tapping device for a gas-fired heat treatment furnace according to claim 5, characterized in that: The bottom end of the filter cylinder (302) is provided with a threaded groove.

7. The furnace pressure tapping device for a gas-fired heat treatment furnace according to claim 5, characterized in that: The external threaded pipe (301) is threadedly connected to the internal threaded ring (202).

8. The furnace pressure tapping device for a gas-fired heat treatment furnace according to claim 1, characterized in that: The upper end of the pressure tapping tube (4) is provided with a threaded protrusion, which is threadedly connected to the threaded groove.

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