Self-clinging type finned tube bundle wall temperature measuring device

Abstract

The utility model provides a self-clinging type finned tube bundle wall temperature measuring device. The device comprises a temperature sensing element, a fixing protection mechanism, a self-fastening mechanism and a wire. The fixing protection mechanism comprises a protection shell, a fixing plate, a supporting plate and a protection plate. The protection shell is used for protecting and fixing an internal structure, the fixing plate is used for fixing the wall temperature measuring device to a finned tube, the supporting plate is used for supporting and connecting the protection plate, the protection plate is used for clamping and protecting the temperature sensing element and the wire, the self-fastening mechanism is used for ejecting the temperature sensing element out of the protection shell and making contact with the base tube, and the wire is used for transmitting a signal measured by the temperature sensing element. A self-clinging finned tube bundle wall temperature measuring device is characterized in that a temperature sensing element of the device is tightly attached to a tube wall under the elastic force action of a self-fastening mechanism, the pop-up distance of the temperature sensing element can adapt to the size requirements of different finned tubes due to elastic deformation, a protective shell is used for shielding environmental wind, and measurement errors caused by the fact that the environmental wind directly blows the temperature sensing element are avoided. And the accuracy and reliability of finned tube bundle wall temperature monitoring are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of power generation, in particular to a wall temperature measuring device for the fins of a radiator in an air-cooled system. Background Art

[0002] As the main part of the indirect air-cooled system of a generator set, the finned tube bundle is prone to the problem of ice blockage in cold winters in northern regions, affecting the normal operation of the system; measuring the wall temperature of the finned tube bundle by installing a wall temperature measuring device for the finned tube bundle and timely adjusting the operating parameters of the indirect air-cooled system is a direct and effective method to prevent ice blockage of the finned tube bundle.

[0003] A Chinese authorized patent, patent number 2024107699650, discloses an air-cooled tube bundle temperature measuring device, which includes: a temperature sensing element, a fixed protection device, and a wire; the fixed protection device includes a protection plate, a fixing plate, a wind shield, and a protection shell; the protection plate is used to clamp and fix the temperature sensing element and the wire, the fixing plate is used to install the protection plate with an inner concave arc at the end, and the inner concave arc at the end of the protection plate is matched with the finned tube to be measured, the wind shield is used to install the fixing plate, and the wind shield is connected and fixed to the finned tube bundle through the mounting holes on it that are matched with the fin spacing, the protection shell is spliced and connected with the wind shield to protect the temperature sensing element, and the wire exports the signal measured by the temperature sensing element to related equipment; the temperature sensing element of this device is in direct contact with the base tube to be measured to measure the wall temperature of the base tube, and the wind shield is used to block the ambient wind to avoid measurement errors caused by the ambient wind blowing directly on the temperature sensing element, improving the accuracy and reliability of the wall temperature monitoring of the finned tube bundle.

[0004] In the above-mentioned patent temperature measuring device, the temperature sensing element is connected to the fixing plate by bolts under the clamping of the protection plate, and the bolt connection part is wrapped in the protection shell; the size of the temperature sensing element protruding from the protection shell needs to be determined before the processing and production of the temperature measuring device and is fixed by bolts. During the installation of the temperature measuring device to the finned tube bundle, the protruding size of the temperature sensing element is not easy to adjust. However, there are certain differences in the sizes of different parts of the finned tube, making it difficult for the non-adjustable protruding size of the temperature sensing element to be matched and installed with different parts of the finned tube. A self-adhering wall temperature measuring device for a finned tube bundle of the present utility model allows the temperature sensing element to slide back and forth between the support plate under the clamping and fixing of the protection plate, and is pushed forward by the self-fastening mechanism to the rear end of the protection plate to push the temperature sensing element. When the wall temperature measuring device is installed on the finned tube, the base tube contacts the temperature sensing element and presses the temperature sensing element back. The pressing distance depends on the size of the finned tube. At this time, the temperature sensing element is tightly attached to the outer wall of the base tube under the elastic force of the self-fastening mechanism, realizing that the wall temperature measuring device can adaptively adhere to the outer wall of the base tube according to the size of the finned tube, improving the accuracy of the wall temperature monitoring of the finned tube bundle and the reliability of the data. Summary of the Invention

[0005] The utility model provides a self - adhering finned tube bundle wall temperature measuring device. By cutting an inner concave arc at one end of the guard plate of the finned tube bundle wall temperature measuring device close to the tube wall of the base tube, installing the finned tube bundle wall temperature measuring device on the finned tube bundle, and making the temperature - sensing element directly contact the outer wall of the base tube of the finned tube bundle under the elastic force of the self - fastening mechanism, the self - adhering finned tube bundle wall temperature measuring device can meet the installation requirements of finned tubes of different sizes, increase the measurement accuracy, reduce the measurement error, speed up the response time, and improve the flexibility of the self - adhering finned tube bundle wall temperature monitoring and the accuracy and reliability of the data.

[0006] A self - adhering finned tube bundle wall temperature measuring device includes a temperature - sensing element, a fixed protection mechanism, a self - fastening mechanism, and a wire. It is characterized in that: the temperature - sensing element is in direct contact with the tube wall of the finned tube for measuring the wall temperature of the base tube; the fixed protection mechanism is used to fix the temperature - sensing element on the finned tube; the self - fastening mechanism is used to keep the front probe of the temperature - sensing element in close contact with the tube wall of the finned tube all the time; the wire is used to transmit the signal measured by the temperature - sensing element.

[0007] The types of the temperature - sensing element are resistance temperature - sensing elements or thermocouple temperature - sensing elements or digital temperature - sensing elements; the types of the resistance temperature - sensing elements are Pt100 or Pt1000 or Cu50 or Cu100; the types of the thermocouple temperature - sensing elements are K - type or J - type or T - type or E - type or R - type or S - type or N - type; the digital temperature - sensing element is DS18B20; the wire is connected to the temperature - sensing element for data transmission.

[0008] The fixed protection mechanism includes a protection shell, a fixing plate, a support plate, and a guard plate. The protection shell is used to protect the measuring device and prevent the environmental wind from directly blowing on the temperature - sensing element to ensure accurate temperature measurement of the temperature - sensing element; the fixing plate is fixedly connected to the outer wall of the protection shell by welding for fixing the temperature - sensing element on the finned tube; the support plate is fixed on the inner wall of the protection shell for supporting and connecting the guard plate to realize the front - and - back sliding of the guard plate; the guard plate is used to clamp and protect the temperature - sensing element and the wire and drive the temperature - sensing element to slide back and forth on the support plate.

[0009] The protection shell includes a lower protection shell and an upper protection shell. A horizontal transverse hole is opened on the side wall of the lower protection shell for the guard plate to clamp the temperature - sensing element and extend out of the protection shell; a support plate is installed on the side wall of the lower protection shell; a self - fastening mechanism is installed on the side wall of the upper protection shell.

[0010] The fixing plate connected to the side of the lower protection shell close to the finned tube bundle is provided with fixing bolt holes, and the wall temperature measuring device is fixed to the finned tube by passing fixing bolts through the fixing plate.

[0011] The guard plate includes a lower guard plate and an upper guard plate; the long strip bolt holes of the lower guard plate and the circular bolt holes of the support plate are connected by anti-loosening screws; the lower guard plate and the upper guard plate are provided with an inner concave arc with a circular or elliptical cross-sectional shape; one end of the lower guard plate and the upper guard plate with the inner concave arc is the front end; the inner concave arc of the lower guard plate is aligned with the inner concave arc of the upper guard plate.

[0012] The overlapping part of the lower guard plate and the upper guard plate is fixed by stamping and welding; the total thickness ts of the upper guard plate and the lower guard plate needs to be set in matching with the fin pitch p, and ts ≤ p.

[0013] The long strip bolt holes of the lower guard plate, the circular bolt holes of the support plate and the anti-loosening screws form a slideway mechanism. The anti-loosening screws connect the lower guard plate and the support plate but do not press tightly, so that the lower guard plate can slide freely back and forth on the support plate, and the sliding distance is the length of the long strip bolt holes; the size of the front end of the temperature sensing element sliding out of the protective shell under the clamping of the guard plate is L, and 0 < L ≤ 10 mm.

[0014] The self-fastening mechanism is a spring or a spring piece; the self-fastening mechanism is installed and fixed on the side wall of the upper protective shell, and the top end of the spring or the spring piece is closely attached to the rear end of the lower guard plate, so that when the guard plate clamps the temperature sensing element and pops out to the outside of the protective shell, it can be closely attached to the tube wall of the finned tube; the model of the spring or the spring piece matches the finned tube bundle to avoid damage to the base tube at the front end of the guard plate due to excessive elastic force.

[0015] This device is installed on the finned tube bundle; the distance between the temperature sensing element and the bottom of the finned tube bundle is H1, and the total height of the finned tube bundle is H, and 0 ≤ H1 ≤ H.

[0016] Compared with the existing technologies, the beneficial effects of the present utility model are as follows: The present utility model provides a self - adhering finned tube bundle wall temperature measuring device, which includes a temperature - sensing element, a protective shell, a fixing plate, a support plate, a protective plate, a self - fastening mechanism, and a wire. One end of the protective plate of the self - adhering finned tube bundle wall temperature measuring device, which is close to the base tube wall, is cut to form an inner concave arc. The finned tube bundle wall temperature measuring device is installed on the finned tube bundle. Under the elastic force of the self - fastening mechanism, the temperature - sensing element is in direct contact with the outer wall of the base tube of the finned tube bundle. As the problem of ice blockage of the finned tube bundle of the generator set becomes increasingly serious in the cold winter in the northern region, affecting the normal operation of the unit, the existing temperature measuring device has a long conduction path, which reduces the sensitivity of the temperature sensor, and the installation of the temperature measuring device cannot meet the requirements of the diversity of the finned tube bundle sizes. To solve the deficiencies of the existing temperature measuring device, the present utility model provides a self - adhering finned tube bundle wall temperature measuring device. The temperature - sensing element can slide back and forth between the support plate under the clamping and fixing of the protective plate, and the self - fastening mechanism pushes the temperature - sensing element forward to the rear end of the protective plate. Under the combined extrusion of the finned tube and the self - fastening mechanism, the temperature - sensing element is closely attached to the outer wall of the base tube. It has strong installation adaptability, high measurement accuracy, reduces measurement error and response time, and improves the flexibility of finned tube bundle wall temperature monitoring and the accuracy and reliability of data. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of a self - adhering finned tube bundle wall temperature measuring device.

[0018] Figure 2 It is an assembly diagram of a self - adhering finned tube bundle wall temperature measuring device.

[0019] Figure 3 It is an installation schematic diagram of a self - adhering finned tube bundle wall temperature measuring device.

[0020] Figure 4 It is a structural diagram of a self - adhering finned tube bundle wall temperature measuring device with the self - fastening mechanism being a spring in Embodiment 2.

[0021] In the figure: 1 - temperature - sensing element, 2 - lower protective shell, 3 - upper protective shell, 4 - fixing plate, 5 - support plate, 6 - lower protective plate, 7 - upper protective plate, 8 - self - fastening mechanism, 9 - wire, 10 - base tube, 11 - fin, 12 - horizontal transverse hole, 13 - long - strip bolt hole, 14 - circular bolt hole, 15 - wall temperature measuring device. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] To make the technical means, creative features, achieved purposes and effects of the present utility model easy to understand, the present utility model will be further elaborated below in conjunction with specific embodiments.

[0023] As Figure 1 , Figure 2 ,Figure 3 A self - adhering finned tube bundle wall temperature measuring device is shown. The device includes a temperature sensing element 1, a lower protective shell 2, an upper protective shell 3, a fixing plate 4, a support plate 5, a lower guard plate 6, an upper guard plate 7, a self - fastening mechanism 8, and a wire 9. The finned tube bundle includes a base tube 10 and fins 11. The fixing plate 4 fixes the measuring device on the fin 11 of the finned tube bundle. The support plate 5 is connected to the lower protective shell 2, and the lower guard plate 6 is installed on the support plate 5. The temperature sensing element 1 and the wire 9 are clamped between the lower guard plate 6 and the upper guard plate 7. The lower protective shell 2 is connected to the upper protective shell 3, and the self - fastening mechanism 8 is installed on the inner side wall of the upper protective shell 3. The temperature sensing element 1 is in direct contact with the outer wall of the base tube 10. The fins 11 of the finned tube bundle are sleeved on the base tube 10. The gap between two adjacent fins 11 is p. The types of the temperature sensing element 1 are resistance temperature sensing elements or thermocouple temperature sensing elements or digital temperature sensing elements. The types of resistance temperature sensing elements are Pt100 or Pt1000 or Cu50 or Cu100. The types of thermocouple temperature sensing elements are K - type or J - type or T - type or E - type or R - type or S - type or N - type. The type of digital temperature sensing element is DS18B20. The wire 9 is connected to the temperature sensing element 1 for data transmission. The lower guard plate 6 and the upper guard plate 7 are provided with concave arcs, and the cross - sectional shapes of the concave arcs of the lower guard plate 6 and the upper guard plate 7 are circular or elliptical. One end of the lower guard plate 6 and the upper guard plate 7 with concave arcs is the front end. The concave arcs of the lower guard plate 6 and the upper guard plate 7 are aligned. The overlapping part of the lower guard plate 6 and the upper guard plate 7 is fixed by stamping and welding. The total thickness of the lower guard plate 6 and the upper guard plate 7 is ts, and ts ≤ p. A horizontal transverse hole 12 is provided on the side wall of the lower protective shell 2. The wall temperature measuring device is installed between the fins 11 of the finned tube bundle through the fixing plate 4. The upper plane of the support plate 5 is flush with the lower bottom surface of the horizontal transverse hole 12. The lower guard plate 6 is connected to the support plate 5, and the long - strip bolt hole 13 of the lower guard plate 6, the circular bolt hole 14 of the support plate 5, and the anti - detachment screw form a slideway mechanism. The self - fastening mechanism 8 is a spring or a spring piece. After the self - fastening mechanism 8 is installed on the upper protective shell 3, it is pushed against the rear end of the lower guard plate 6, and the temperature sensing element 1 is pushed out of the lower protective shell 2 to the outer wall of the base tube 10 along the slideway mechanism by elastic force. The concave arcs of the lower guard plate 6 and the upper guard plate 7 are tangent to the cross - section of the base tube 10. The distance that the temperature sensing element 1 extends out of the lower protective shell 2 is L, and 0 < L ≤ 10 mm. The wall temperature measuring device 15 is installed on the finned tube bundle. The distance between the wall temperature measuring device 15 and the bottom of the finned tube bundle is H1, and 0 ≤ H1 ≤ H.

[0024] Example 1 installs a self - adhering finned tube bundle wall temperature measuring device on the finned tube bundle.

[0025] As Figure 1 、 Figure 2 、 Figure 3A self - adhering finned tube bundle wall temperature measuring device is shown. The device includes a temperature sensing element 1, a lower protective shell 2, an upper protective shell 3, a fixing plate 4, a support plate 5, a lower guard plate 6, an upper guard plate 7, a self - fastening mechanism 8, and a wire 9. The finned tube bundle includes a base tube 10 and fins 11. The fixing plate 4 fixes the measuring device on the fin 11 of the finned tube bundle. The support plate 5 is connected to the lower protective shell 2, and the lower guard plate 6 is installed on the support plate 5. The temperature sensing element 1 and the wire 9 are clamped between the lower guard plate 6 and the upper guard plate 7. The lower protective shell 2 is connected to the upper protective shell 3, and the self - fastening mechanism 8 is installed on the inner side wall of the upper protective shell 3. The temperature sensing element 1 is in direct contact with the outer wall of the base tube 10. The fins 11 of the finned tube bundle are sleeved on the base tube 10. The gap between two adjacent fins 11 is p, and p = 6 mm. The material of the fins 11 is aluminum. The temperature sensing element 1 is a thermal resistance temperature sensing element Pt100. The wire 9 is connected to the temperature sensing element 1 for data transmission. The lower guard plate 6 and the upper guard plate 7 are provided with concave arcs, and the cross - sectional shape of the concave arcs of the lower guard plate 6 and the upper guard plate 7 is circular. One end of the lower guard plate 6 and the upper guard plate 7 with the concave arc is the front end. The concave arcs of the lower guard plate 6 and the upper guard plate 7 are aligned. The overlapping part of the lower guard plate 6 and the upper guard plate 7 is fixed by stamping and welding. The total thickness of the lower guard plate 6 and the upper guard plate 7 is ts, and ts = 5 mm. A horizontal transverse hole 12 is provided on the side wall of the lower protective shell 2. The wall temperature measuring device is installed between the fins 11 of the finned tube bundle through the fixing plate 4. The upper plane of the support plate 5 is flush with the lower bottom surface of the horizontal transverse hole 12. The lower guard plate 6 is connected to the support plate 5, and the long - strip bolt hole 13 of the lower guard plate 6, the circular bolt hole 14 of the support plate 5 and the anti - detachment screw form a slideway mechanism. The self - fastening mechanism 8 is a spring piece. After the self - fastening mechanism 8 is installed on the upper protective shell 3, it is pushed to the rear end of the lower guard plate 6, and the temperature sensing element 1 is pushed out of the lower protective shell 2 to the outer wall of the base tube 10 along the slideway mechanism by the elastic force. The concave arcs of the lower guard plate 6 and the upper guard plate 7 are tangent to the cross - section of the base tube 10. The distance that the temperature sensing element 1 extends out of the lower protective shell 2 is L, and L = 3 mm. The wall temperature measuring device 15 is installed on the finned tube bundle. The distance between the wall temperature measuring device 15 and the bottom of the finned tube bundle is H1, and H1 = 1.5 m.

[0026] Example 2 installs a self - adhering finned tube bundle wall temperature measuring device on the finned tube bundle.

[0027] As Figure 2 、 Figure 3 、 Figure 4A self - adhering finned tube bundle wall temperature measuring device is shown. The device includes a temperature sensing element 1, a lower protective shell 2, an upper protective shell 3, a fixing plate 4, a support plate 5, a lower guard plate 6, an upper guard plate 7, a self - fastening mechanism 8, and a wire 9. The finned tube bundle includes a base tube 10 and fins 11. The fixing plate 4 fixes the measuring device on the fin 11 of the finned tube bundle. The support plate 5 is connected to the lower protective shell 2, and the lower guard plate 6 is installed on the support plate 5. The temperature sensing element 1 and the wire 9 are clamped between the lower guard plate 6 and the upper guard plate 7. The lower protective shell 2 is connected to the upper protective shell 3, and the self - fastening mechanism 8 is installed on the inner side wall of the upper protective shell 3. The temperature sensing element 1 is in direct contact with the outer wall of the base tube 10. The fins 11 of the finned tube bundle are sleeved on the base tube 10. The gap between two adjacent fins 11 is p, and p = 4 mm. The material of the fin 11 is steel. The temperature sensing element 1 is a thermal resistance temperature sensing element Pt100. The wire 9 is connected to the temperature sensing element 1 for data transmission. The lower guard plate 6 and the upper guard plate 7 are provided with concave arcs, and the cross - sectional shape of the concave arcs of the lower guard plate 6 and the upper guard plate 7 is oval. The end of the lower guard plate 6 and the upper guard plate 7 with the concave arc is the front end. The concave arcs of the lower guard plate 6 and the upper guard plate 7 are aligned. The overlapping part of the lower guard plate 6 and the upper guard plate 7 is fixed by stamping and welding. The total thickness of the lower guard plate 6 and the upper guard plate 7 is ts, and ts = 4 mm. A horizontal transverse hole 12 is provided on the side wall of the lower protective shell 2. The wall temperature measuring device is installed between the fins 11 of the finned tube bundle through the fixing plate 4. The upper plane of the support plate 5 is flush with the lower bottom surface of the horizontal transverse hole 12. The lower guard plate 6 is connected to the support plate 5, and the elongated bolt hole 13 of the lower guard plate 6, the circular bolt hole 14 of the support plate 5 and the anti - detachment screw form a slideway mechanism. The self - fastening mechanism 8 is a spring. After the self - fastening mechanism 8 is installed on the upper protective shell 3, it is pushed to the rear end of the lower guard plate 6, and the temperature sensing element 1 is pushed out of the lower protective shell 2 to the outer wall of the base tube 10 along the slideway mechanism by the elastic force. The concave arcs of the lower guard plate 6 and the upper guard plate 7 are tangent to the cross - section of the base tube 10. The distance that the temperature sensing element 1 extends out of the lower protective shell 2 is L, and L = 2 mm. The wall temperature measuring device 15 is installed on the finned tube bundle. The distance between the wall temperature measuring device 15 and the bottom of the finned tube bundle is H1, and H1 = 7 m.

[0028] Embodiment 3 installs a self - adhering finned tube bundle wall temperature measuring device on the finned tube bundle.

[0029] As Figure 1 、 Figure 2 、 Figure 3A self - adhering finned tube bundle wall temperature measuring device is shown; the device includes a temperature sensing element 1, a lower protective shell 2, an upper protective shell 3, a fixing plate 4, a support plate 5, a lower guard plate 6, an upper guard plate 7, a self - fastening mechanism 8, and a wire 9; the finned tube bundle includes a base tube 10 and fins 11; the fixing plate 4 fixes the measuring device on the fin 11 of the finned tube bundle; the support plate 5 is connected to the lower protective shell 2, the lower guard plate 6 is installed on the support plate 5, the temperature sensing element 1 and the wire 9 are clamped between the lower guard plate 6 and the upper guard plate 7, the lower protective shell 2 is connected to the upper protective shell 3, and the self - fastening mechanism 8 is installed on the inner side wall of the upper protective shell 3; the temperature sensing element 1 is in direct contact with the outer wall of the base tube 10; the fins 11 of the finned tube bundle are sleeved on the base tube 10; the gap between two adjacent fins 11 is p, and p = 5 mm; the material of the fin 11 is aluminum; the temperature sensing element 1 is a thermal resistance temperature sensing element Pt100; the wire 9 is connected to the temperature sensing element 1 for data transmission; the lower guard plate 6 and the upper guard plate 7 are provided with concave arcs, and the cross - sectional shape of the concave arcs of the lower guard plate 6 and the upper guard plate 7 is circular; the end of the lower guard plate 6 and the upper guard plate 7 with the concave arc is the front end; the concave arcs of the lower guard plate 6 and the upper guard plate 7 are aligned; the overlapping part of the lower guard plate 6 and the upper guard plate 7 is fixed by stamping and welding; the total thickness of the lower guard plate 6 and the upper guard plate 7 is ts, and ts = 3 mm; a horizontal transverse hole 12 is provided on the side wall of the lower protective shell 2; the wall temperature measuring device is installed between the fins 11 of the finned tube bundle through the fixing plate 4; the upper plane of the support plate 5 is flush with the lower bottom surface of the horizontal transverse hole 12; the lower guard plate 6 is connected to the support plate 5, and the long - strip bolt hole 13 of the lower guard plate 6, the circular bolt hole 14 of the support plate 5 and the anti - detachment screw form a slideway mechanism; the self - fastening mechanism 8 is a spring piece; after the self - fastening mechanism 8 is installed on the upper protective shell 3, it is pushed to the rear end of the lower guard plate 6, and the temperature sensing element 1 is pushed out of the lower protective shell 2 to the outer wall of the base tube 10 along the slideway mechanism by the elastic force; the concave arcs of the lower guard plate 6 and the upper guard plate 7 are tangent to the cross - section of the base tube 10; the distance that the temperature sensing element 1 extends out of the lower protective shell 2 is L, and L = 2.5 mm; the wall temperature measuring device 15 is installed on the finned tube bundle; the distance between the wall temperature measuring device 15 and the bottom of the finned tube bundle is H1, and H1 = 0.3 m.

Claims

1. A self - adhering finned tube bundle wall temperature measuring device, comprising a temperature sensing element, a fixed protection mechanism, a self - fastening mechanism, and a wire; characterized in that: The temperature sensing element is in direct contact with the tube wall of the finned tube and is used to measure the base tube wall temperature; the fixing and protecting mechanism is used to fix the temperature sensing element on the finned tube; the self-fastening mechanism is used to keep the front probe of the temperature sensing element in close contact with the tube wall of the finned tube all the time; the wire is used to transmit the signal measured by the temperature sensing element.

2. The self - adhering finned tube bundle wall temperature measuring device according to claim 1, characterized in that: The types of the temperature sensing element are thermal resistance temperature sensing element or thermocouple temperature sensing element or digital temperature sensing element; the types of the thermal resistance temperature sensing element are Pt100 or Pt1000 or Cu50 or Cu100; the types of the thermocouple temperature sensing element are K type or J type or T type or E type or R type or S type or N type; the digital temperature sensing element is DS18B20.

3. The self - adhering finned tube bundle wall temperature measuring device according to claim 1, characterized in that: The fixing and protecting mechanism includes a protective shell, a fixing plate, a support plate and a protective plate; the protective shell is used to protect the measuring device and avoid the direct blowing of the environmental wind on the temperature sensing element to ensure accurate temperature measurement of the temperature sensing element; the fixing plate is fixed to the outer wall of the protective shell by welding and is used to fix the temperature sensing element on the finned tube; the support plate is fixed on the inner wall of the protective shell and is used to support and connect the protective plate to realize the front and back sliding of the protective plate; the protective plate is used to clamp and protect the temperature sensing element and the wire and drive the temperature sensing element to slide back and forth on the support plate.

4. The self - adhering finned tube bundle wall temperature measuring device according to claim 3, wherein: The protective shell includes a lower protective shell and an upper protective shell; a horizontal transverse hole is opened on the side wall of the lower protective shell for the protective plate to clamp the temperature sensing element to protrude outside the protective shell; a support plate is installed on the side wall of the lower protective shell; a self-fastening mechanism is installed on the side wall of the upper protective shell.

5. The self - adhering finned tube bundle wall temperature measuring device according to claim 4, characterized in that: The fixing plate connected to the side of the lower protective shell close to the finned tube bundle is provided with fixing bolt holes, and the wall temperature measuring device is fixed to the finned tube through the fixing bolts passing through the fixing plate.

6. The self - adhering finned tube bundle wall temperature measuring device according to claim 3, wherein: The protective plate includes a lower protective plate and an upper protective plate; the long strip bolt holes of the lower protective plate and the circular bolt holes of the support plate are connected by anti-loosening screws; the lower protective plate and the upper protective plate are provided with inner concave arcs with a circular or elliptical cross-sectional shape; the ends of the lower protective plate and the upper protective plate with inner concave arcs are the front ends; the inner concave arcs of the lower protective plate and the upper protective plate are aligned.

7. The self - adhering finned tube bundle wall temperature measuring device according to claim 6, characterized in that: The overlapping part of the lower protective plate and the upper protective plate is fixed by stamping and welding; the total thickness ts of the upper protective plate and the lower protective plate needs to be matched with the fin pitch p, and ts ≤ p.

8. The self - adhering finned tube bundle wall temperature measuring device according to claim 6, characterized in that: The long strip bolt holes of the lower protective plate, the circular bolt holes of the support plate and the anti-loosening screws form a slideway mechanism. The anti-loosening screws connect the lower protective plate and the support plate but do not press them tightly, so that the lower protective plate can slide freely back and forth on the support plate, and the sliding distance is the length of the long strip bolt holes; the size of the front end of the temperature sensing element sliding out of the protective shell under the clamping of the protective plate is L, and 0 < L ≤ 10 mm.

9. The self-adhering finned tube bundle wall temperature measuring device according to claim 1, wherein: The self-fastening mechanism is a spring or a spring piece; the self-fastening mechanism is installed and fixed on the side wall of the upper protective shell, and the top of the spring or the spring piece is closely attached to the rear end of the lower protective plate, so that when the protective plate clamps the temperature sensing element and pops out of the protective shell, it can be in close contact with the tube wall of the finned tube; the model of the spring or the spring piece is matched with the finned tube bundle to avoid damage to the base tube by excessive elastic force at the front end of the protective plate.

10. The self - adhering finned tube bundle wall temperature measuring device according to claim 1, characterized in that: The device is installed on the finned tube bundle; the distance between the temperature sensing element and the bottom of the finned tube bundle is H1, the total height of the finned tube bundle is H, and 0 ≤ H1 ≤ H.

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