A thermocouple for boiler tubes and a boiler

Abstract

This invention relates to the field of boiler temperature measurement technology, and more particularly to a thermocouple for boiler tubes and a boiler. The thermocouple for boiler tubes mainly includes a heat-collecting block, a first fixing block, a second fixing block, and a temperature element. The heat-collecting block is fixed to the outer wall of the boiler tube along a first direction. The first fixing block is disposed on the outer wall of the boiler tube along a second direction, with a first predetermined distance between the first fixing block and the heat-collecting block. The second fixing block is disposed on the outer wall of the boiler tube along a third direction, with a second predetermined distance between the second fixing block and the first fixing block. The first direction is opposite to the third direction, and the second direction is perpendicular to both the first and third directions. The temperature element passes through the heat-collecting block, the first fixing block, and the second fixing block, and is configured to measure the temperature of the outer wall of the boiler tube. This thermocouple for boiler tubes has a simple structure, improves the stability of the connection between the thermocouple and the boiler tube, extends the service life of the thermocouple, and saves costs.

Description

Technical Field

[0001] This invention relates to the field of boiler temperature measurement technology, and in particular to a thermocouple for boiler tubes and a boiler. Background Technology

[0002] The superheater is a high-temperature component in a boiler, and superheated steam has poor heat absorption capacity, resulting in limited cooling of the boiler tubes. Furthermore, the superheater is directly located at the front end of the horizontal flue, directly subjected to the convective impact of the high-temperature flue gas from the furnace outlet. This makes the superheater one of the boiler's heating surfaces with the most deteriorating working conditions. Therefore, from an operational perspective, preventing superheater tube wall overheating and ensuring the boiler tube temperature remains within the allowable range over the long term is a crucial issue that must be considered in boiler unit operation. Monitoring the wall temperature is therefore the only means of monitoring the superheater temperature, and controlling superheater overheating based on temperature is the most critical aspect of boiler combustion.

[0003] In existing technologies, many power plants install wall temperature collectors by welding heat collection blocks onto the superheater tube walls. After the temperature elements are installed and secured, the upper 50 centimeters of the heat collection blocks are directly tied to the furnace tubes with iron wire. However, the boiler's internal ambient temperature is high, and the iron wire may corrode and fall off after a few months. It may also fall off due to human contact during routine boiler maintenance, which seriously affects the monitoring of wall temperature.

[0004] Therefore, there is an urgent need to design a thermocouple for boiler tubes and a boiler to solve the technical problems of unstable thermocouple fixation and easy detachment in the existing technology. Summary of the Invention

[0005] The primary objective of this invention is to provide a thermocouple for boiler tubes. This thermocouple has a simple structure, is easy to assemble, and can improve the stability and reliability of the connection between the thermocouple and the boiler tube, extend the service life of the thermocouple, and save costs.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] This invention provides a thermocouple for boiler tubes, wherein the thermocouple is used to detect the outer wall temperature of the boiler tubes, comprising:

[0008] A heat collection block, wherein the heat collection block is fixed to the outer wall of the boiler tube along a first direction;

[0009] A first fixing block is disposed on the outer wall of the boiler tube along a second direction, and the first fixing block is spaced apart from the heat collection block by a first preset distance.

[0010] The second fixing block is disposed on the outer wall of the boiler tube along a third direction, and the second fixing block is spaced a second preset distance from the first fixing block; the first direction is opposite to the third direction, and the second direction is perpendicular to both the first direction and the third direction;

[0011] A temperature element passing through the heat collection block, the first fixing block, and the second fixing block, the temperature element being configured to measure the outer wall temperature of the boiler tubes.

[0012] As an optional technical solution for thermocouples in boiler tubes, the first preset distance is equal to the second preset distance.

[0013] As an optional technical solution for thermocouples in boiler tubes, the heat collection block includes a heat-conducting block, on which a first groove is provided, and the temperature element is partially embedded in the first groove.

[0014] As an optional technical solution for thermocouples in boiler tubes, the heat collection block includes a pressure block, and a second groove is provided on the pressure block. The second groove is directly opposite to the first groove, and the temperature element can be embedded in the first groove and the second groove.

[0015] As an optional technical solution for thermocouples in boiler tubes, the heat collection block includes a pin, which passes through the heat-conducting block and connects to the pressure block.

[0016] As an optional technical solution for thermocouples in boiler tubes, the heat collection block includes a fixing member connected to the pressure block, which can press the temperature element tightly against the pressure block.

[0017] As an optional technical solution for thermocouples in boiler tubes, the heat collection block includes a connecting seat, which is fixedly mounted on the heat-conducting block, and the fixing part passes through the connecting seat.

[0018] As an optional technical solution for thermocouples in boiler tubes, the fixing component is a hexagonal bolt.

[0019] As an optional technical solution for thermocouples in boiler tubes, the fixing member is provided with multiple ball bearings at one end near the pressure block.

[0020] The present invention also provides a boiler, wherein the boiler includes the thermocouples of the boiler tubes described above.

[0021] The beneficial effects of this invention are as follows:

[0022] This invention provides a thermocouple for boiler tubes. The thermocouple has a simple structure. By fixing the first fixing block, the second fixing block, and the heat collection block to the outer wall of the boiler tube in three different directions, the temperature element presents a three-dimensional "S-shape". This improves the stability and reliability of the connection between the thermocouple and the outer wall of the boiler tube, avoids the thermocouple from falling off during normal operation, extends its service life, and saves costs.

[0023] The present invention also provides a boiler, which includes the thermocouple of the boiler tube and the boiler tube. The thermocouple of the boiler tube is installed on the outer wall of the boiler tube, which can improve the stability and reliability of the thermocouple of the boiler tube, thereby improving the maintenance efficiency of the boiler, saving costs, and extending the service life of the boiler. Attached Figure Description

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

[0025] Figure 1 A schematic diagram of the structure of a boiler tube thermocouple installed on the outer wall of the boiler tube, provided in an embodiment of the present invention;

[0026] Figure 2 This is a front view of the heat collection block provided in an embodiment of the present invention;

[0027] Figure 3 A side view of the heat collection block provided in an embodiment of the present invention;

[0028] Figure 4 A front view of the first fixed block provided in an embodiment of the present invention.

[0029] Figure Labels

[0030] 100. Boiler tubes;

[0031] 200, Heat collector block; 210, Heat conductor block; 220, First groove; 230, Pressing block; 2301, Second groove; 240, Pin; 250, Fixing component; 260, Connecting seat;

[0032] 300, First fixing block; 400, Second fixing block; 500, Temperature element. Detailed Implementation

[0033] To make the technical problems solved by the present invention, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0034] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0035] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0036] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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 present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0037] like Figures 1-3As shown, this embodiment provides a thermocouple for a boiler tube. The thermocouple is used to detect the outer wall temperature of the boiler tube 100. The thermocouple mainly includes a heat collector 200, a first fixing block 300, a second fixing block 400, and a temperature element 500. The heat collector 200 is fixed to the outer wall of the boiler tube 100 along a first direction. The first fixing block 300 is disposed on the outer wall of the boiler tube 100 along a second direction, with a first preset distance between the first fixing block 300 and the heat collector 200. The second fixing block 400 is disposed on the outer wall of the boiler tube 100 along a third direction, with a second preset distance between the second fixing block 400 and the first fixing block 300. The first direction is opposite to the third direction, and the second direction is perpendicular to both the first and third directions. The temperature element 500 passes through the heat collector 200, the first fixing block 300, and the second fixing block 400, and is configured to measure the outer wall temperature of the boiler tube 100. The first direction is... Figure 1 The X-axis direction and the second direction are Figure 1 The Y-axis direction and the third direction are Figure 1 The Z-axis direction in the equation.

[0038] Furthermore, in this embodiment, the first preset distance is equal to the second preset distance. This facilitates the fixation of the temperature element 500 by the first fixing block 300 and the second fixing block 400, ensuring that the temperature element 500 is subjected to more even force and preventing any part of the temperature element 500 from becoming loose or falling off. Optionally, the first preset distance and the second preset distance can be set between 30cm and 100cm, for example, values ​​such as 30cm, 50cm, 80cm, or 100cm, which will not be listed here.

[0039] Based on the above design, the temperature element 500 is three-dimensional "S-shaped", which can improve the stability and reliability of the temperature element 500 on the outer wall of the boiler tube 100. In addition, a temperature probe is provided at the end of the temperature element 500 near the heat collector block 200, and the temperature probe is embedded in the heat collector block 200.

[0040] like Figures 2-4 As shown, in this embodiment, the structures of the first fixing block 300, the second fixing block 400, and the heat collecting block 200 are basically the same. The only difference is that the interior of the heat collecting block 200 is not through, while the interiors of the first fixing block 300 and the second fixing block 400 are through. This makes it easier for the heat collecting block 200 to better collect the temperature of the outer wall of the boiler tube 100, and at the same time, it can also play a certain protective role for the temperature probe and improve the accuracy of the temperature probe in measuring temperature.

[0041] Compared with the prior art, the thermocouple structure of the boiler tube provided in this embodiment is simple. By fixing the first fixing block 300, the second fixing block 400 and the heat collection block 200 to three different directions on the outer wall of the boiler tube 100, the temperature element 500 presents a three-dimensional "S-shape", thereby improving the stability and reliability of the connection between the thermocouple of the boiler tube and the outer wall of the boiler tube 100, avoiding the phenomenon of the thermocouple of the boiler tube falling off during normal operation, extending its service life and saving costs.

[0042] like Figures 2-3 As shown, in this embodiment, the heat collection block 200 includes a fixing member 250, a heat-conducting block 210, and a pressing block 230. The heat-conducting block 210 has a first groove 220, and the pressing block 230 has a second groove 2301. The second groove 2301 is directly opposite the first groove 220. The temperature element 500 can be embedded in the first groove 220 and the second groove 2301. The fixing member 250 is connected to the pressing block 230, and the fixing member 250 can press the pressing block 230 tightly against the temperature element 500. This eliminates the need for the fixing member 250 to directly contact the temperature element 500. Instead, the operator drives the fixing member 250, which in turn drives the pressing block 230 to press the temperature element 500, thus avoiding damage to the temperature element 500 and extending its service life. The first groove 220 and the second groove 2301 can improve the reliability and stability of the temperature element 500 in the heat collector block 200, and avoid the risk of the temperature element 500 slipping and becoming unstable when the operator drives the fixing part 250 to drive the pressure block 230 to press the temperature element 500.

[0043] Furthermore, the fastener 250 can be a hexagonal bolt, which facilitates later maintenance, replacement, and disassembly. In other words, when the temperature element 500 reaches the end of its lifespan, operators can simply use a wrench to remove the hexagonal bolt, remove the expired temperature element 500, and replace it with a new one, without needing to remove the heat collector block 200. This reduces the frequency of welding between the heat collector block 200 and the boiler tube 100, improving operational efficiency and saving costs.

[0044] Please continue to refer to this. Figures 2-3In this embodiment, the heat collection block 200 includes a connecting seat 260, which is fixedly mounted on the heat-conducting block 210. A portion of the fixing member 250 passes through the connecting seat 260. The connecting seat 260 not only guides the fixing member 250 but also seals the heat-conducting block 210, ensuring the temperature sensor of the temperature element 500 is in a sealed space, preventing heat loss. This allows the temperature element 500 to accurately measure the temperature of the outer wall of the boiler tube 100, improving measurement accuracy. Furthermore, the connecting seat 260 protects the temperature element 500 from external dust and other foreign matter. Optionally, in this embodiment, the connecting seat 260 and the heat-conducting block 210 are welded together using argon arc welding to improve welding stability. Of course, other welding methods can be used, and this embodiment does not limit this method.

[0045] Please continue to refer to this. Figures 2-3 In this embodiment, the heat collection block 200 includes a pin 240, which passes through the heat-conducting block 210 and connects to the pressure block 230. The pin 240 improves the reliability of the pressure block 230 and prevents it from wobbling inside the heat-conducting block 210. A plurality of ball bearings (not shown in the figure) are provided at one end of the fixing member 250 near the pressure block 230, thereby improving the smoothness of the operator's movement of the fixing member 250 and thus improving work efficiency.

[0046] This embodiment also provides a boiler, which includes the thermocouples of the boiler tubes mentioned above. The thermocouples of the boiler tubes are installed on the outer wall of the boiler tubes 100, which can improve the stability and reliability of the thermocouples of the boiler tubes, thereby improving the maintenance efficiency of the boiler, saving costs, and extending the service life of the boiler.

[0047] Obviously, the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

[0048] Note that in the description of this specification, references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. A thermocouple for boiler tubes, wherein the thermocouple for boiler tubes is used to detect the outer wall temperature of boiler tubes (100), characterized in that, include: A heat collector block (200) is fixed to the outer wall of the boiler tube (100) along a first direction; A first fixing block (300) is disposed on the outer wall of the boiler tube (100) along the second direction, and the first fixing block (300) is spaced apart from the heat collection block (200) by a first preset distance; The second fixing block (400) is disposed on the outer wall of the boiler tube (100) along a third direction, and the second fixing block (400) is spaced apart from the first fixing block (300) by a second preset distance; the first direction is opposite to the third direction, and the second direction is perpendicular to both the first direction and the third direction; A temperature element (500) passes through the heat collection block (200), the first fixing block (300) and the second fixing block (400), and the temperature element (500) is configured to measure the outer wall temperature of the boiler tube (100); By fixing the first fixing block (300), the second fixing block (400) and the heat collection block (200) to three different directions on the outer wall of the boiler tube (100), the temperature element (500) presents a three-dimensional "S-shape".

2. The thermocouple for boiler tubes according to claim 1, characterized in that, The first preset distance is equal to the second preset distance.

3. The thermocouple for boiler tubes according to claim 1, characterized in that, The heat collection block (200) includes a heat-conducting block (210), and a first groove (220) is provided on the heat-conducting block (210). The temperature element (500) is partially embedded in the first groove (220).

4. The thermocouple for boiler tubes according to claim 3, characterized in that, The heat collection block (200) includes a pressure block (230), and a second groove (2301) is provided on the pressure block (230). The second groove (2301) is directly opposite to the first groove (220), and the temperature element (500) can be embedded in the first groove (220) and the second groove (2301).

5. The thermocouple for boiler tubes according to claim 4, characterized in that, The heat collection block (200) includes a pin (240) that passes through the heat-conducting block (210) and is connected to the pressure block (230).

6. The thermocouple for boiler tubes according to claim 4, characterized in that, The heat collection block (200) includes a fixing member (250) connected to the pressure block (230), and the fixing member (250) can press the pressure block (230) to press the temperature element (500).

7. The thermocouple for boiler tubes according to claim 6, characterized in that, The heat collection block (200) includes a connecting seat (260), which is fixedly disposed on the heat conduction block (210), and the fixing member (250) partially passes through the connecting seat (260).

8. The thermocouple for boiler tubes according to claim 6, characterized in that, The fastener (250) is a hexagonal bolt.

9. The thermocouple for boiler tubes according to claim 6, characterized in that, The fixing member (250) has a plurality of ball bearings at one end near the pressure block (230).

10. A boiler, characterized in that, The boiler includes thermocouples for the boiler tubes as described in any one of claims 1-9.

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