Auxiliary heating device

Abstract

The utility model relates to the technical field of nuclear power station equipment, in particular to an auxiliary heating device. The auxiliary heating device comprises a clamping mechanism and a heating piece, the clamping mechanism comprises an annular frame, a clamping cavity matched with the penetrating piece is formed in the annular frame, a plurality of containing cavities used for containing the heating piece are formed in the side, away from the clamping cavity, of the annular frame, the containing cavities are evenly distributed in the circumferential direction of the annular frame, and the heating piece is clamped in the containing cavities. The utility model provides an auxiliary heating device to relieve the technical problem that an auxiliary heating device in the prior art is uneven in heating.

Description

Technical Field

[0001] This utility model relates to the field of nuclear power plant equipment technology, and in particular to an auxiliary heating device. Background Technology

[0002] The containment vessel of a nuclear power plant is the last line of defense against the leakage of radioactive materials. The containment vessel consists of a cylindrical plate and penetrations welded to the cylindrical plate. The welding quality of the penetrations is of paramount importance. The preheating and post-heat treatment of the weld during welding directly affect the performance of the weld joint and are crucial to the long-term safe operation of the nuclear power plant.

[0003] The functions of preheating are as follows: First, preheating slows down the cooling rate of the weld joint during welding. After the welding arc is removed, the weld and its surrounding area cool rapidly. If the cooling rate is too fast, the weld metal is prone to hardening. Hardened structures have high hardness and low toughness, which significantly reduces the mechanical properties of the weld joint, making it prone to cracking and other failures during subsequent operation. Second, preheating reduces welding stress. During welding, the weld metal shrinks during solidification and cooling. This shrinkage is constrained by the surrounding base material, thus generating welding stress. Appropriate preheating can reduce the temperature gradient between the weld and the base material during welding, reducing the difference in shrinkage during cooling, thereby reducing the generation of welding stress. Lower welding stress helps prevent defects such as cracks in the weld and its heat-affected zone. Third, preheating can also reduce welding deformation to some extent. Welding deformation is mainly caused by uneven heat input and cooling during welding. Preheating raises the overall temperature of the weldment, resulting in a more uniform heat distribution during welding. This effectively controls the amount of welding deformation and ensures the dimensional and installation accuracy of the through-workpiece.

[0004] The primary function of post-weld heating is to diffuse hydrogen gas. During welding, impurities such as oil and rust on the surface of the welding materials and base metal decompose at high temperatures, producing hydrogen gas. The solubility of hydrogen in the weld metal decreases as the temperature decreases. If the hydrogen gas does not have enough time to escape when the weld cools, hydrogen pores will form inside the weld, and hydrogen-induced cracks may even form in the weld. Post-weld heating keeps the weld metal at a relatively high temperature for a period of time, allowing sufficient time for hydrogen gas to diffuse out of the weld, thereby preventing the formation of hydrogen-induced cracks.

[0005] However, in the existing technology, the auxiliary heating device for preheating and post-heat treatment of the weld between the through-hole and the cylinder plate is difficult to ensure the uniformity of heating when heating the weld of the through-hole.

[0006] Therefore, this application provides a new auxiliary heating device to address the above-mentioned problems. Utility Model Content

[0007] The purpose of this invention is to provide an auxiliary heating device to at least alleviate the technical problem of uneven heating in existing auxiliary heating devices.

[0008] To achieve the above objectives, this utility model provides an auxiliary heating device, which includes a clamping mechanism and a heating element;

[0009] The clamping mechanism includes an annular frame, which has a clamping cavity that matches the through member. On the side of the annular frame away from the clamping cavity, there are multiple receiving cavities for accommodating the heating element. The multiple receiving cavities are evenly distributed along the circumference of the annular frame, and the heating element is clamped in the receiving cavity.

[0010] Furthermore, the heating element is a heating rod or a heating plate.

[0011] Furthermore, the annular frame has multiple ear flaps on the side away from the clamping cavity, and the multiple ear flaps are evenly distributed along the circumference of the annular frame, forming the receiving cavity between adjacent ear flaps.

[0012] Furthermore, the auxiliary heating device also includes a reinforcing mechanism for fastening the heating element to the surface of the cylindrical plate.

[0013] Furthermore, multiple reinforcement mechanisms are provided, and each of the multiple reinforcement mechanisms corresponds to one of the receiving cavities.

[0014] Furthermore, the reinforcement mechanism includes a flexible component and a fixing pin, one end of the flexible component is fixedly connected to the annular frame, and the other end is fixedly connected to the fixing pin;

[0015] The ear flap is provided with a locking hole, and the fixing pin can be inserted into the locking hole. After the fixing pin is inserted into the locking hole, the two ends of the fixing pin are respectively located on both sides of the locking hole, and can respectively abut against the two heating elements on both sides of the locking hole, so that the heating elements are locked between the fixing pin and the cylindrical plate, thereby the heating elements are fastened to the surface of the cylindrical plate.

[0016] Furthermore, the annular frame includes multiple sub-frames, which are sequentially connected end to end to form the clamping cavity, and the gap between adjacent sub-frames is adjustable.

[0017] Furthermore, the clamping mechanism also includes a connecting component, through which adjacent sub-frames are connected, and the connecting component is capable of adjusting the gap between adjacent sub-frames.

[0018] Furthermore, the adjacent sub-frames are respectively the first sub-frame and the second sub-frame;

[0019] The connecting assembly includes a threaded connector, a nut, a first connecting bracket disposed on the first sub-frame, and a second connecting bracket disposed on the second sub-frame. Both the first connecting bracket and the second connecting bracket are provided with connecting holes. The threaded connector can pass through the connecting holes on the first connecting bracket and the second connecting bracket and then be tightened by the nut.

[0020] Furthermore, the frame body is made of alloy steel.

[0021] By adopting the above technical solution, the auxiliary heating device of this utility model has at least the following beneficial effects:

[0022] When using the auxiliary heating device, the annular frame is placed over the through-piece, so that the through-piece is located in the clamping cavity and the annular frame abuts against the cylinder plate. Then, multiple heating elements are clamped into the multiple receiving cavities one by one. It is simple to use and easy to operate.

[0023] In this configuration, multiple heating elements are individually secured within multiple receiving cavities and firmly attached to the surface of the cylindrical plate. This allows the multiple heating elements to heat the weld between the through-hole and the cylindrical plate, for example, for preheating or post-heating treatment. Furthermore, because the multiple receiving cavities are evenly distributed along the circumference of the annular frame, the uniform distribution of the heating elements ensures even heating of the weld, preventing localized overheating or underheating. This improves the uniformity of the heating process and alleviates the problem of uneven heating in existing auxiliary heating devices. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 A schematic diagram of the auxiliary heating device provided in this embodiment of the utility model (only some heating elements and reinforcing mechanisms are shown);

[0026] Figure 2 for Figure 1 Top view of the auxiliary heating device;

[0027] Figure 3 The auxiliary heating device provided in this embodiment of the utility model is installed behind the penetrating member and the cylindrical plate.

[0028] Figure label:

[0029] 1-Through-through component; 2-Cylinder plate;

[0030] 3-Ring frame; 31-Clamping cavity; 32-Accommodation cavity; 33-Separated frame;

[0031] 4-Ear flap; 41-Card slot;

[0032] 5-Heating element;

[0033] 61-Flexible component; 62-Fixing pin;

[0034] 71-Threaded connector; 72-Nut; 73-First connecting bracket; 74-Second connecting bracket. Detailed Implementation

[0035] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0036] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0037] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0038] Example

[0039] Please see Figure 1This embodiment provides an auxiliary heating device, which includes a clamping mechanism and a heating element 5. The clamping mechanism includes an annular frame 3, and the annular frame 3 is provided with a clamping cavity 31 that matches the through member 1. On the side of the annular frame 3 away from the clamping cavity 31, a plurality of receiving cavities 32 for accommodating the heating element 5 are provided. The plurality of receiving cavities 32 are evenly distributed along the circumference of the annular frame 3, and the heating element 5 is clamped in the receiving cavity 32.

[0040] Please see Figure 3 In this embodiment, when the auxiliary heating device is used, the annular frame 3 is sleeved on the outside of the through piece 1, so that the through piece 1 is located in the clamping cavity 31 and the annular frame 3 abuts against the cylindrical plate 2. Then, multiple heating elements 5 are clamped into multiple receiving cavities 32 one by one. It is simple to use and easy to operate.

[0041] With this configuration, multiple heating elements 5 are fitted into multiple receiving cavities 32, and the heating elements 5 are fastened to the surface of the cylindrical plate 2, so that the multiple heating elements 5 can heat the weld between the through piece 1 and the cylindrical plate 2, for example, for preheating or post-heating treatment.

[0042] In this auxiliary heating device, since multiple receiving cavities 32 are evenly distributed along the circumference of the annular frame 3, after the heating element 5 is installed in the receiving cavity 32, the multiple heating elements 5 are evenly distributed along the circumference of the annular frame 3, so that the layout of the multiple heating elements 5 is uniform, thereby enabling uniform heating of all parts of the weld, avoiding the problem of local overheating or insufficient heating of the weld, improving the uniformity of the heating process, and alleviating the technical problem of uneven heating of auxiliary heating devices in the prior art.

[0043] Preferably, the ring frame 3 is designed to be circular or approximately circular to accommodate the outer contour shape of most through-pieces 1. Its inner diameter can be designed according to the size range of common through-pieces 1, while reserving a certain adjustment space.

[0044] Optionally, in this embodiment, the heating element 5 is a heating rod or a heating plate.

[0045] Among them, the heating element has the advantages of large heating area and high thermal efficiency, and can fit well against the surface of the cylindrical plate 2; the heating rod has the characteristics of high power density and fast heating speed. According to different welding requirements and the characteristics of the penetrating part 1, different types of heating elements 5 can be selected, or heating elements 5 can be a combination of heating rod and heating element.

[0046] It should be noted that the heating element 5 is connected to an external power source via a high-temperature resistant wire. The wire is made of a high-temperature resistant material with good insulation properties, such as ceramic fiber insulated wire, to ensure electrical safety in high-temperature environments.

[0047] Preferably, please refer to, for example Figure 1 and Figure 2 In this embodiment, a plurality of ear flaps 4 are provided on the side of the annular frame 3 away from the clamping cavity 31. The plurality of ear flaps 4 are evenly distributed along the circumference of the annular frame 3, and a receiving cavity 32 is formed between adjacent ear flaps 4.

[0048] For example, the number of ear flaps 4 can be two, three, four, five or six, etc., in which multiple ear flaps 4 are evenly distributed along the circumference of the annular frame 3, so that multiple receiving cavities 32 are evenly distributed along the circumference of the annular frame 3, thereby the heating element 5 in the receiving cavity 32 is evenly distributed along the circumference of the annular frame 3, which can uniformly heat all parts of the weld.

[0049] Preferably, in this embodiment, the auxiliary heating device further includes a reinforcing mechanism, which is used to fasten the heating element 5 to the surface of the cylindrical plate 2.

[0050] When using the auxiliary heating device, the annular frame 3 is fitted over the through piece 1, so that the through piece 1 is located in the clamping cavity 31 and the annular frame 3 abuts against the cylindrical plate 2; then, multiple heating elements 5 are clamped into multiple receiving cavities 32 one by one, and the heating elements 5 are fastened to the surface of the cylindrical plate 2 by the reinforcing mechanism. It is simple to use and easy to operate.

[0051] With this configuration, multiple heating elements 5 are fitted into multiple receiving cavities 32, and the heating elements 5 are fastened to the surface of the cylindrical plate 2, so that the multiple heating elements 5 can heat the weld between the through piece 1 and the cylindrical plate 2, for example, for preheating or post-heating treatment.

[0052] In this auxiliary heating device, since multiple receiving cavities 32 are evenly distributed along the circumference of the annular frame 3, after the heating element 5 is inserted into the receiving cavity 32, the multiple heating elements 5 are evenly distributed along the circumference of the annular frame 3, so that the layout of the multiple heating elements 5 is uniform, thereby enabling uniform heating of all parts of the weld. In addition, the heating element 5 is fastened to the surface of the cylinder plate 2 by the reinforcing mechanism, so that the multiple heating elements 5 can fit well against the surface to be heated, thereby making the heating effect of all parts of the weld the same, and avoiding the problem of local overheating or underheating of the weld, thus improving the uniformity of the heating process.

[0053] Preferably, please refer to, for example Figure 1 and Figure 2 In this embodiment, multiple reinforcement mechanisms are provided, and each reinforcement mechanism corresponds to a receiving cavity 32.

[0054] This configuration allows the heating element 5 in each cavity 32 to be fastened to the surface of the cylinder plate 2 by the reinforcement mechanism, so that multiple heating elements 5 can fit well against the surface to be heated, and the heating effect is the same at all parts of the weld.

[0055] Optionally, the reinforcement mechanism can be a snap-fit ​​structure, allowing the heating element 5 to snap onto the surface of the cylindrical plate 2. Snap-fits are suitable for quick installation and disassembly, and are particularly suitable for through-pieces 1 with regular shapes and flat surfaces. Alternatively, the reinforcement mechanism can be a bolt-fit structure, allowing the heating element 5 to be screwed onto the surface of the cylindrical plate 2. Bolts provide a more secure fixation, suitable for applications subject to significant vibration or external forces. It should be noted that the fixing method is not limited here, as long as it effectively secures the heating element 5 to the surface of the cylindrical plate 2.

[0056] Preferably, please refer to, for example Figure 1 and Figure 2 In this embodiment, the reinforcement mechanism includes a flexible member 61 and a fixing pin 62. One end of the flexible member 61 is fixed to the annular frame 3, and the other end is fixed to the fixing pin 62. The ear flap 4 is provided with a locking hole 41. The fixing pin 62 can be inserted into the locking hole 41. After the fixing pin 62 is inserted into the locking hole 41, the two ends of the fixing pin 62 are located on both sides of the locking hole 41, and can respectively abut against the two heating elements 5 on both sides of the locking hole 41, so that the heating elements 5 are locked between the fixing pin 62 and the cylindrical plate 2, thereby the heating elements 5 are fastened to the surface of the cylindrical plate 2.

[0057] Optionally, the flexible component 61 is a chain. The chain has good flexibility, and for the irregularly shaped through-piece 1, it can be fixed by wrapping the chain around it and tightening it.

[0058] With this setup, after the heating element 5 is placed in the receiving cavity 32, the fixing pin 62 is inserted into the locking hole 41. At this time, the two ends of the fixing pin 62 are located on both sides of the locking hole 41, and the two ends of the fixing pin 62 can respectively abut against the two heating elements 5 on both sides of the locking hole 41, so that the heating element 5 is locked between the fixing pin 62 and the cylinder plate 2, thus realizing that the heating element 5 is fastened to the surface of the cylinder plate 2, and the surface of the cylinder plate 2 can be heated.

[0059] Preferably, please refer to, for example Figure 1 and Figure 2 In this embodiment, the annular frame 3 includes multiple sub-frames 33, which are sequentially connected end to end to form a clamping cavity 31, and the gap between adjacent sub-frames 33 is adjustable.

[0060] Optionally, the number of sub-frames 33 can be two, three, four, five, or six, etc., and the number can be selected according to the actual situation, without limitation here.

[0061] The gap between adjacent sub-frames 33 is adjustable, thereby allowing the size of the clamping cavity 31 of the annular frame 3 to be adjusted. For example, when the outer diameter of the through-piece 1 is large, the gap between adjacent sub-frames 33 can be adjusted by the connecting assembly to increase the gap, thus making the clamping cavity 31 larger and able to accommodate the through-piece 1 with a larger outer diameter; when the outer diameter of the through-piece 1 is small, the gap between adjacent sub-frames 33 can be adjusted by the connecting assembly to decrease the gap, thus making the clamping cavity 31 smaller and able to accommodate the through-piece 1 with a smaller outer diameter. Therefore, the annular frame 3 of this embodiment can be applied to through-pieces 1 with both large and small outer diameters, that is, it can be applied to containment through-pieces 1 of different nuclear power plants that have significant differences in size, shape, and structure. It has sufficient flexibility and adjustability, improves the adaptability of the auxiliary heating device, and can be effectively installed and used when encountering through-pieces 1 of different specifications, reducing construction costs and time costs.

[0062] Preferably, in this embodiment, the clamping mechanism further includes a connecting component, and adjacent sub-frames 33 are connected by the connecting component, and the connecting component can adjust the gap between adjacent sub-frames 33.

[0063] With this configuration, the connecting components can adjust the gap between adjacent subframes 33, thereby allowing the size of the clamping cavity 31 of the annular frame 3 to be adjusted.

[0064] Preferably, please refer to, for example Figure 1 and Figure 2 In this embodiment, the adjacent sub-frames 33 are the first sub-frame and the second sub-frame, respectively; the connecting components include a threaded connector 71, a nut 72, a first connecting frame 73 disposed on the first sub-frame and a second connecting frame 74 disposed on the second sub-frame. Both the first connecting frame 73 and the second connecting frame 74 are provided with connecting holes. The threaded connector 71 can pass through the connecting holes on the first connecting frame 73 and the second connecting frame 74 and then be tightened by the nut 72.

[0065] Optionally, the threaded connector 71 can be a screw, bolt, threaded rod, or stud, with the threaded portion having a certain length. With this configuration, after the annular frame 3 is fitted over the through member 1, the threaded connector 71 is passed through the connecting hole on the first connecting frame 73 and the connecting hole on the second connecting frame 74, and then tightened by the nut 72, thus completing the connection between the adjacent sub-frames 33.

[0066] Specifically, when the outer diameter of the through-piece 1 is large, the portion of the threaded connector 71 located between the first connecting frame 73 and the second connecting frame 74 is longer, resulting in a larger distance between the first connecting frame 73 and the second connecting frame 74. This increases the gap between adjacent sub-frames 33, and the clamping cavity 31 is larger, enabling it to accommodate the through-piece 1 with a larger outer diameter. When the outer diameter of the through-piece 1 is small, the portion of the threaded connector 71 located between the first connecting frame 73 and the second connecting frame 74 is shorter, resulting in a smaller distance between the first connecting frame 73 and the second connecting frame 74. This decreases the gap between adjacent sub-frames 33, and the clamping cavity 31 is smaller, enabling it to accommodate the through-piece 1 with a smaller outer diameter.

[0067] Preferably, in this embodiment, the subframe 33 is made of alloy steel.

[0068] It should be noted that the annular frame 3, as the basic support structure of the auxiliary heating device, is made of high-strength metal materials, such as alloy steel. This material has good high-temperature resistance and corrosion resistance, and can withstand the complex working conditions in the nuclear power plant operating environment.

[0069] It should now be added that the auxiliary heating device in this embodiment is used as follows:

[0070] The first step is the installation of the device: the annular frame 3 is fitted over the through-piece 1, so that the through-piece 1 is located in the clamping cavity 31, and the annular frame 3 abuts against the cylindrical plate 2; the adjacent sub-frames 33 are connected by a connecting assembly, so that the annular frame 3 and the through-piece 1 are tightly fixed to prevent the annular frame 3 from falling off the through-piece 1. Specifically, since the screw of the threaded connector 71 has a certain length, the position of the screw part of the threaded connector 71 is adjusted by adjusting the position of the adjusting nut 72 screwed on the threaded connector 71 to adjust the gap between the first connecting frame 73 and the second connecting frame 74, thereby adjusting the distance between the first sub-frame and the second sub-frame, so that the size of the clamping cavity 31 of the annular frame 3 can be adjusted, which can be used for through-pieces 1 with large and small outer diameters. Then, multiple heating elements 5 are inserted one by one into multiple receiving cavities 32, and fixing pins 62 are inserted into the locking holes 41. At this time, the two ends of the fixing pins 62 are located on both sides of the locking holes 41, and the two ends of the fixing pins 62 can respectively abut against the two heating elements 5 on both sides of the locking holes 41, so that the heating elements 5 are locked between the fixing pins 62 and the cylinder plate 2, thus realizing that the heating elements 5 are fastened to the surface of the cylinder plate 2, and the surface of the cylinder plate 2 can be heated.

[0071] The second step is preheating: Connect the power supply, turn on the heating element 5, and set the preheating temperature and time according to the welding process requirements. During the preheating process, the surface temperature of the penetrating part 1 can be monitored in real time by the temperature sensor to ensure the preheating effect.

[0072] The third step is welding: After preheating, welding of the through part 1 is carried out. During the welding process, the auxiliary heating device can be kept in place.

[0073] Step 4, post-heating operation: After welding is completed, immediately turn on the heating element 5 to perform post-heating operation, and set the post-heating temperature and time according to the process requirements.

[0074] Step 5: After the post-heating process is complete, turn off the power and remove the device.

[0075] In summary, the auxiliary heating device of this embodiment can ensure uniform heating of the welding area of ​​the penetration 1. Through reasonable structural design and layout of heating elements 5, it overcomes the problem of uneven heating in the prior art, ensures the quality of the welded joint, and reduces welding defects. Furthermore, it has high flexibility and adjustability, enabling the auxiliary heating device to adapt to various sizes and shapes of containment penetrations 1 in nuclear power plants, reducing construction costs and improving the versatility and applicability of the device.

[0076] The auxiliary heating device in this embodiment has a simple overall structure and a compact design. It can be adjusted according to the actual size requirements of the through-piece 1, and has the following characteristics:

[0077] (1) Clear main structure: The device uses a ring frame 3 as its main structure. The ring frame 3 can naturally surround the penetrating part 1 and conforms to the shape characteristics of the penetrating part 1. The position of the device can be determined relatively easily during installation. For example, when facing the circular penetrating part 1, the ring frame 3 can fit perfectly without complicated positioning operations.

[0078] (2) Intuitive component connection: The heating element 5, connecting assembly, and reinforcing mechanism are all directly connected to the annular frame 3. The heating element 5 is evenly distributed on the annular frame 3, and its connection method is simple and easy to operate. The connection relationship between the reinforcing mechanism and the annular frame 3 is intuitive, and no complicated steps are required during installation and disassembly.

[0079] (3) Applicable to different heating requirements of penetrating parts 1: The heating element 5 can be selected in various ways, and different forms of heating elements such as heating plates or heating rods can be selected according to the actual situation. For penetrating parts 1 of different materials and sizes, the specific heating requirements can be met by selecting the appropriate heating element 5. At the same time, the connecting assembly can flexibly adjust the size of the clamping cavity 31, which enables the device to heat penetrating parts 1 of different shapes and sizes evenly. Whether it is a small penetrating part 1 or a large penetrating part 1, the ideal heating effect can be achieved by adjustment.

[0080] (4) Low equipment cost: Since the device integrates preheating and postheating functions, it can significantly reduce equipment procurement costs compared to purchasing and using separate preheating and postheating equipment. During the construction or maintenance of nuclear power plants, multiple through-hole welding operations are usually required. Using this integrated device can reduce the number of equipment required, thereby saving a lot of money.

[0081] (5) Reduced construction time and labor costs: The ease of operation and integrated design reduce equipment changeover time during construction. Each welding operation can save 2-4 hours of equipment changeover time, which will greatly shorten the overall project duration in large-scale nuclear power plant through-hole welding construction. Moreover, due to the simplified operation, the number of construction personnel required may be reduced, or the same number of personnel can complete more welding work in the same amount of time, thereby reducing labor costs.

[0082] (6) Low maintenance and repair costs: The relatively simple structure of the device makes it easier to troubleshoot and repair when a fault occurs. Compared with complex multi-device combinations, this device has relatively fewer points of failure, allowing maintenance personnel to find and fix problems more quickly. Moreover, due to the use of common heating elements 5, connecting components, and reinforcement mechanisms, the replacement costs of these parts are relatively low, further reducing the long-term maintenance costs of the device.

[0083] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. An auxiliary heating device, characterized in that, Including clamping mechanism and heating element (5); The clamping mechanism includes an annular frame (3), and the annular frame (3) is provided with a clamping cavity (31) that matches the through member (1). On the side of the annular frame (3) away from the clamping cavity (31), there are multiple receiving cavities (32) for accommodating the heating element (5). The multiple receiving cavities (32) are evenly distributed along the circumference of the annular frame (3), and the heating element (5) is clamped in the receiving cavity (32).

2. The supplemental heating device of claim 1, wherein, The heating element (5) is a heating rod or a heating plate.

3. The supplemental heating device of claim 1, wherein, The annular frame (3) has multiple ear flaps (4) on the side away from the clamping cavity (31). The multiple ear flaps (4) are evenly distributed along the circumference of the annular frame (3), and the receiving cavity (32) is formed between adjacent ear flaps (4).

4. The supplemental heating device of claim 3, wherein, The auxiliary heating device also includes a reinforcement mechanism for fastening the heating element (5) to the surface of the cylindrical plate (2).

5. The supplemental heating device of claim 4, wherein, Multiple reinforcement mechanisms are provided, and each of the multiple reinforcement mechanisms corresponds to one of the receiving cavities (32).

6. The supplemental heating device of claim 4, wherein, The reinforcement mechanism includes a flexible component (61) and a fixing pin (62). One end of the flexible component (61) is fixed to the annular frame (3), and the other end is fixed to the fixing pin (62). The ear flap (4) is provided with a locking hole (41), and the fixing pin (62) can be inserted into the locking hole (41). After the fixing pin (62) is inserted into the locking hole (41), the two ends of the fixing pin (62) are respectively located on both sides of the locking hole (41) and can respectively abut against the two heating elements (5) on both sides of the locking hole (41), so that the heating element (5) is locked between the fixing pin (62) and the cylindrical plate (2), thereby the heating element (5) is fastened to the surface of the cylindrical plate (2).

7. The supplemental heating device of any of claims 1-6, wherein, The annular frame (3) includes multiple sub-frames (33), which are connected end to end to form the clamping cavity (31), and the gap between adjacent sub-frames (33) is adjustable.

8. The supplemental heating device of claim 7, wherein, The clamping mechanism also includes a connecting component, through which adjacent sub-frames (33) are connected, and the connecting component is capable of adjusting the gap between adjacent sub-frames (33).

9. The supplemental heating device of claim 8, wherein, The adjacent sub-frames (33) are respectively the first sub-frame and the second sub-frame; The connecting assembly includes a threaded connector (71), a nut (72), a first connecting frame (73) disposed on the first sub-frame, and a second connecting frame (74) disposed on the second sub-frame. Both the first connecting frame (73) and the second connecting frame (74) are provided with connecting holes. The threaded connector (71) can pass through the connecting holes on the first connecting frame (73) and the second connecting frame (74) and then be tightened by the nut (72).

10. The auxiliary heating device according to claim 7, characterized in that, The subframe (33) is made of alloy steel.

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