Spring type ash hopper temperature measuring device

Abstract

The utility model discloses spring formula ash bucket temperature measuring device, including branch pipe, temperature measuring element, movable positioning mechanism, junction box and elastic telescopic mechanism, one end of branch pipe is fixed on ash bucket wall and another end is detachable type closed by movable positioning mechanism, temperature measuring element is along the pipe body channel and is inserted into branch pipe inside and is indirectly connected through elastic telescopic mechanism and movable positioning mechanism, elastic telescopic mechanism can utilize elasticity and force temperature measuring element to support probe ash bucket wall, junction box is electrically connected with temperature measuring element, and the whole radiation heat radiation is little, and can be no difference heat transfer, thereby ensuring that the wall surface temperature of determination is correct, reliable.

Description

Technical Field

[0001] This utility model relates to the technical field of ash hoppers, and in particular to the technical field of temperature measurement in ash hoppers. Background Technology

[0002] In the field of flue gas pollutant treatment and dust removal technology, dust collectors are one of the core devices for dust separation and pollutant emission control in industrial production, and are widely used in industries such as power, metallurgy, and chemicals. The ash hopper, as a key component of the dust collector, primarily collects and temporarily stores the dust separated during dust removal. To ensure the stable operation of the ash hopper and the dust collector as a whole, an insulation layer is usually installed on the outside of the ash hopper, as illustrated by publication number CN115509157A, "An Intelligent Control System and Method for Ash Hopper Heating Based on Multiple Measurements," and publication number CN20. The 9081405U variable diameter ash hopper; the core function of the insulation layer is specifically reflected in two aspects—firstly, to prevent the wall surface temperature from being too low, thereby avoiding the condensation of moisture in the dust due to the wall surface temperature being lower than the dew point temperature, which would lead to dust adhesion and caking, blocking the discharge port and internal channels, and disrupting the normal discharge process; secondly, to prevent the wall surface temperature from fluctuating significantly with the external environment, especially in cold environments or scenarios where the dust contains corrosive components, thereby preventing the wall surface from freezing and causing problems such as corrosion of the metal shell and hardening failure of seals, protecting the structural integrity and reducing the risk of dust leakage.

[0003] Since the temperature of the ash hopper is closely related to the dust treatment effect and the safe operation of the equipment (if the ash hopper temperature is abnormal, too high a temperature may cause the dust to spontaneously combust, while too low a temperature may cause the dust to clump and block the ash hopper), it is necessary to use a temperature measuring device to accurately monitor the temperature of the ash hopper in real time, such as the dust removal ash hopper conveying detection system with publication number CN114877967A.

[0004] Currently, the industry has established a fixed method for conventional temperature measurement of dust collector hoppers. The specific implementation process involves first welding an installation pipe to a pre-designed location on the hopper wall (for ease of assembly, the installation pipe must extend at least 150mm beyond the insulation layer on the outside of the hopper), then inserting a temperature sensing element (such as a PT100 resistance thermometer) into the installation pipe to collect the wall surface temperature, thereby obtaining the hopper temperature. However, in practical applications, this conventional temperature measurement method has significant technical flaws, resulting in the measured wall temperature failing to accurately reflect the true hopper temperature (the measurement results are generally too low), making it difficult to meet the equipment's requirements. The monitoring requires accurate temperature data. Analysis revealed two main issues: the excessively long installation pipe structure (extending at least 150mm beyond the insulation layer causes significant heat loss to the outside via thermal radiation, resulting in a substantial temperature drop) and difficulty in ensuring proper contact between the resistance temperature detector (RTD) probe and the ash hopper wall (the probe position is difficult to control during installation, often leaving a gap between the probe and the ash hopper wall instead of direct contact, preventing effective heat transfer and accurate reflection of the ash hopper wall temperature).

[0005] In summary, the current dust collector hopper temperature measurement technology suffers from two major problems: "the installation pipe extending out of the insulation layer causing thermal radiation temperature drop" and "poor probe contact." These problems, coupled with the basic requirement of temperature stability for the insulation layer, make existing temperature measurement solutions unable to meet the requirements for accurate monitoring. There is an urgent need for a technical solution that can solve the above defects and improve the accuracy of hopper temperature measurement, thereby adapting to the equipment operation and maintenance needs in the fields of flue gas pollutant treatment and dust removal. Summary of the Invention

[0006] The purpose of this invention is to solve the problems in the prior art by proposing a spring-type ash hopper temperature measuring device, which has low overall radiative heat dissipation and can transfer heat indiscriminately, thereby ensuring that the measured wall temperature is accurate and reliable.

[0007] To achieve the above objectives, this utility model proposes a spring-loaded ash hopper temperature measuring device, comprising a branch pipe, a temperature measuring element, a movable positioning mechanism, a junction box, and an elastic telescopic mechanism. One end of the branch pipe is fixed to the ash hopper wall, while the other end is detachably closed by the movable positioning mechanism. The temperature measuring element extends into the branch pipe along the pipe channel and is indirectly connected to the movable positioning mechanism through the elastic telescopic mechanism. The elastic telescopic mechanism can use its elasticity to force the temperature measuring element to push the probe against the ash hopper wall. The junction box is electrically connected to the temperature measuring element.

[0008] Preferably, the elastic telescopic mechanism includes a guide rod and a compression spring. One end of the guide rod is fixed to the temperature measuring element, while the other end can enter and exit the movable positioning mechanism along the insertion channel. The compression spring is sleeved outside the guide rod and provides elastic force to the temperature measuring element away from the movable positioning mechanism when the branch pipe is installed together with the movable positioning mechanism.

[0009] Preferably, a retaining ring is provided between the temperature measuring element and the guide rod, and the two ends of the compression spring support the retaining ring and the movable positioning mechanism respectively.

[0010] Preferably, one end of the branch pipe is welded to the ash hopper wall and the other end is threadedly connected to the movable positioning mechanism.

[0011] Preferably, the movable positioning mechanism includes a hexagonal nut and an external threaded tube, one end of which can be threaded into the tube channel while the other end is fixed with the hexagonal nut.

[0012] Preferably, the junction box is located on the side of the movable positioning mechanism away from the branch pipe, and a wire passage is provided between the movable positioning mechanism and the elastic telescopic mechanism for the temperature measuring element to pass through to the junction box.

[0013] Preferably, the length of the branch pipe is consistent with the thickness of the insulation layer.

[0014] The beneficial effects of this utility model are: 1) Precisely eliminates thermal radiation temperature drop, ensuring basic accuracy of temperature measurement: This utility model ensures that the length of the branch pipe is consistent with the thickness of the insulation layer, and that one end of the branch pipe is welded and fixed to the ash hopper wall while the other end is detachably sealed through a movable positioning mechanism to form a complete sealing structure. This ensures that the branch pipe is completely within the protection range of the insulation layer, preventing the pipe body from being exposed to the external environment and completely blocking the path of heat loss through the branch pipe. In addition, the threaded connection sealing method further reduces heat exchange between the inside and outside of the pipe, ensuring that the heat from the ash hopper wall can be stably conducted to the temperature measuring element inside, laying the foundation for accurate temperature measurement and effectively avoiding the problem of low measurement data caused by thermal radiation temperature drop. 2) Ensuring tight probe contact and consistent heat transfer: Addressing the issue of poor probe contact in traditional temperature measurement solutions, this invention utilizes an elastic telescopic mechanism to ensure tight contact between the temperature sensing element probe and the ash hopper wall, achieving consistent heat transfer. Specifically, when the device is assembled using the movable positioning mechanism, the compression spring generates a continuous elastic force and pushes the temperature sensing element towards the ash hopper wall via the retaining ring, forcing the temperature sensing element to support the probe against the ash hopper wall. This elastic support structure can adapt to a certain range of assembly errors. Even if slight vibrations during long-term use cause minor displacement of the component position, the elastic force of the compression spring can compensate in time, thus maintaining a tight fit between the probe and the ash hopper wall. This ensures seamless and lossless heat transfer from the ash hopper wall to the probe, allowing the temperature sensing element to accurately capture the true temperature of the ash hopper wall and avoiding measurement deviations caused by poor contact. 3) The structural design balances practicality and stability, adapting to complex industrial scenarios: The overall structural design of this device fully considers practicality and stability in industrial scenarios, facilitating installation and maintenance while adapting to the complex operating environment of the dust collector hopper. From an installation perspective, the branch pipe and the hopper wall are welded together, ensuring a strong and well-sealed connection. The external threaded tube of the movable positioning mechanism is directly threaded to the branch pipe, and a hexagonal nut is provided for easy assembly and disassembly by operators using conventional tools, effectively reducing the difficulty of installation and subsequent maintenance. From a stability perspective, each component has a clear division of labor and reliable coordination (the guide rod of the elastic telescopic mechanism provides a stable moving guide for the temperature measuring element, preventing the probe from shifting under elastic force; the retaining ring not only provides a stable force support point for the compression spring but also prevents the compression spring from directly contacting the temperature measuring element and causing wear; the junction box is located on the side of the movable positioning mechanism away from the branch pipe, and an through-through wire channel enables electrical connection with the temperature measuring element, protecting the circuit from external dust and moisture while facilitating circuit maintenance).

[0015] The features and advantages of this utility model will be described in detail through embodiments and accompanying drawings. Attached Figure Description

[0016] Figure 1 This is an assembly diagram of the spring-type ash hopper temperature measuring device of this utility model; Figure 2 This is a front view of the spring-type ash hopper temperature measuring device of this utility model when the branch pipe is removed.

[0017] In the diagram: 1-branch pipe, 2-temperature sensing element, 3-movable positioning mechanism, 31-hexagonal nut, 32-external threaded tube, 4-junction box, 5-elastic telescopic mechanism, 51-guide rod, 52-compression spring, 53-retaining ring, 6-ash hopper wall. Detailed Implementation

[0018] See Figure 1 and Figure 2 This utility model discloses a spring-loaded ash hopper temperature measuring device, comprising a branch pipe 1, a temperature measuring element 2, a movable positioning mechanism 3, a junction box 4, and an elastic telescopic mechanism 5. One end of the branch pipe 1 is fixed to the ash hopper wall 6, while the other end is detachably closed by the movable positioning mechanism 3. The temperature measuring element 2 extends into the branch pipe 1 along the pipe channel and is indirectly connected to the movable positioning mechanism 3 through the elastic telescopic mechanism 5. The elastic telescopic mechanism 5 can use its elasticity to force the temperature measuring element 2 to push the probe against the ash hopper wall 6. The junction box 4 is electrically connected to the temperature measuring element 2. The diameter of the branch pipe 1 is typically controlled between 20 and 24 mm, and the diameter of the temperature measuring element 2 is typically controlled between 6 and 10 mm. In this embodiment, the diameter of the branch pipe 1 is 22 mm, and the diameter of the temperature measuring element 2 is 8 mm. Furthermore, the temperature measuring element 2 can be a three-wire / dual-branch thermal resistor.

[0019] The elastic telescopic mechanism 5 includes a guide rod 51 and a compression spring 52. One end of the guide rod 51 is fixed to the temperature measuring element 2, while the other end can enter and exit the movable positioning mechanism 3 along the insertion channel. The compression spring 52 is sleeved outside the guide rod 51 and provides elastic force to the temperature measuring element 2 away from the movable positioning mechanism 3 when the branch pipe 1 is installed together with the movable positioning mechanism 3.

[0020] A retaining ring 53 is also provided between the temperature sensing element 2 and the guide rod 51. The two ends of the compression spring 52 support the retaining ring 53 and the movable positioning mechanism 3 respectively. The outer diameter of the retaining ring 53 is usually controlled between 10 and 14 mm. In this embodiment, the outer diameter of the retaining ring 53 is 12 mm. In addition, the total length of the temperature sensing element 2 and the retaining ring 53 (i.e., Figure 2 The length of segment m is usually controlled between 300 and 350 mm; in this embodiment, the length of segment m is 330 mm.

[0021] One end of the branch pipe 1 is welded to the ash hopper wall 6, while the other end is threadedly connected to the movable positioning mechanism 3.

[0022] The movable positioning mechanism 3 includes a hexagonal nut part 31 and an external threaded tube 32. One end of the external threaded tube 32 can be screwed into the tube channel, while the other end is fixed with the hexagonal nut part 31. The hexagonal nut part 31 can be an M16*1.5 nut.

[0023] The junction box 4 is located on the side of the movable positioning mechanism 3 away from the branch pipe 1. A wire passage is provided between the movable positioning mechanism 3 and the elastic telescopic mechanism 5 for the temperature sensing element 2 to pass through to the junction box 4. In addition, the distance from the connection position of the hexagonal nut part 31 and the junction box 4 to the retaining ring 53 (i.e. Figure 2 The length of segment n is usually controlled between 80 and 100 mm; in this embodiment, the length of segment n is 90 mm.

[0024] The length of the branch pipe 1 is consistent with the thickness of the insulation layer; wherein, the length of the branch pipe 1 is usually controlled between 350 and 400 mm; in this embodiment, the length of the branch pipe 1 is 360 mm.

[0025] The working process of this utility model: When using it, first select a branch pipe 1 with the same length as the thickness of the insulation layer and weld it to the ash hopper wall 6. Then screw the external threaded pipe 32 into the pipe channel until the temperature measuring element 2 presses the probe against the ash hopper wall 6.

[0026] The above embodiments are illustrative of the present invention and are not intended to limit the present invention. Any simple modifications to the present invention are within the protection scope of the present invention.

Claims

1. A spring hopper temperature measuring device, characterized by: The device includes a branch pipe (1), a temperature measuring element (2), a movable positioning mechanism (3), a junction box (4), and an elastic telescopic mechanism (5). One end of the branch pipe (1) is fixed to the ash hopper wall (6), while the other end is detachably closed by the movable positioning mechanism (3). The temperature measuring element (2) extends into the branch pipe (1) along the pipe body channel and is indirectly connected to the movable positioning mechanism (3) through the elastic telescopic mechanism (5). The elastic telescopic mechanism (5) can use its elasticity to force the temperature measuring element (2) to push the probe against the ash hopper wall (6). The junction box (4) is electrically connected to the temperature measuring element (2).

2. The spring hopper temperature measuring device of claim 1, wherein: The elastic telescopic mechanism (5) includes a guide rod (51) and a compression spring (52). One end of the guide rod (51) is fixed to the temperature measuring element (2), while the other end can enter and exit the movable positioning mechanism (3) along the insertion channel. The compression spring (52) is sleeved outside the guide rod (51) and provides elastic force to the temperature measuring element (2) away from the movable positioning mechanism (3) when the branch pipe (1) and the movable positioning mechanism (3) are installed together.

3. The spring hopper temperature measuring device of claim 2, wherein: A retaining ring (53) is provided between the temperature measuring element (2) and the guide rod (51), and the two ends of the compression spring (52) support the retaining ring (53) and the movable positioning mechanism (3) respectively.

4. The spring-loaded ash hopper temperature measuring device as described in claim 1, characterized in that: One end of the branch pipe (1) is welded to the ash hopper wall (6), while the other end is threadedly connected to the movable positioning mechanism (3).

5. The spring-loaded ash hopper temperature measuring device as described in claim 4, characterized in that: The movable positioning mechanism (3) includes a hexagonal nut (31) and an external threaded tube (32). One end of the external threaded tube (32) can be screwed into the tube channel, while the other end is fixed with the hexagonal nut (31).

6. The spring-loaded ash hopper temperature measuring device as described in claim 1, characterized in that: The junction box (4) is located on the side of the movable positioning mechanism (3) away from the branch pipe (1). A wire passage is provided between the movable positioning mechanism (3) and the elastic telescopic mechanism (5) for the temperature measuring element (2) to pass through to the junction box (4).

7. The spring-loaded ash hopper temperature measuring device as described in any one of claims 1 to 6, characterized in that: The length of the branch pipe (1) is consistent with the thickness of the insulation layer.

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