A high-temperature protection device, mounting device and mounting method

Abstract

The application provides a high-temperature protection device, a mounting device and a mounting method, wherein the high-temperature protection device comprises a connecting pipe and a detection rod, the detection rod is movably arranged in the connecting pipe, a long hole is arranged on the connecting pipe and extends along the axial direction of the connecting pipe, one end of the connecting pipe is provided with a first bolt assembly connected with one end of a fuse link, one end of the detection rod is provided with a second bolt assembly connected with the other end of the fuse link at the position corresponding to the long hole, a compression spring is further arranged between the first bolt assembly and the second bolt assembly, the other end of the connecting pipe is provided with an opening and is connected with a device main body, the other end of the detection rod can extend out of the connecting pipe and trigger a protection mechanism switch of the device main body, and the central axis of the connecting pipe, the central axis of the detection rod and the center line of the fuse link along the length direction of the fuse link coincide. The high-temperature protection device can prevent the occurrence of unexpected fracture, thereby effectively improving the safety and reliability of the entire fire extinguishing system.

Description

Technical Field

[0001] This invention belongs to the technical field of high temperature protection equipment, and specifically relates to a high temperature protection device, installation device, and installation method. Background Technology

[0002] Fire prevention is a crucial aspect of the design and operation of nuclear power plants. To prevent the spread of fire and smoke between different buildings or fire compartments, nuclear power plants are widely equipped with smoke isolation devices, including fire dampers and air valves. These devices are usually linked to high-temperature protection devices. When a fire occurs, the high-temperature environment triggers the protection devices, which in turn drives the isolation valves to close, forming a physical barrier and controlling the fire within the initial compartment.

[0003] Currently, the most commonly used triggering mechanism in the industry is the mechanical fuse high-temperature protection device. Its working principle relies on the characteristic of a specific alloy fuse that automatically melts and breaks at the nominal temperature. This characteristic, through mechanical linkages or cable mechanisms, directly or indirectly controls the closing action of fire valves. This solution is widely used due to its simple structure, lack of external power supply, and theoretically high reliability. However, in the long-term operation of actual nuclear power plants, there have been numerous instances of unexpected fuse breakage, leading to fire compartment failures and the unit occupying unintended emergency repair quotas.

[0004] Therefore, how to effectively improve the quality of high-temperature protection devices and prevent unexpected breakage is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a high-temperature protection device that can prevent unexpected breakage, thereby effectively improving the safety and reliability of the entire fire protection system.

[0006] Another object of the present invention is to provide an installation device.

[0007] Another object of the present invention is to provide an installation method.

[0008] To achieve the above objectives, the present invention provides the following technical solution:

[0009] A high-temperature protection device includes a connecting pipe and a detection rod, wherein the detection rod is movably disposed inside the connecting pipe, and the connecting pipe is provided with an elongated hole extending along the axial direction of the connecting pipe;

[0010] One end of the connecting tube is provided with a first bolt assembly connected to one end of the fuse, and one end of the probe is provided with a second bolt assembly connected to the other end of the fuse at the position corresponding to the elongated hole. A compression spring is also provided between the first bolt assembly and the second bolt assembly.

[0011] The other end of the connecting pipe is provided with an opening and is connected to the main body of the equipment. The other end of the probe rod can extend out of the connecting pipe and trigger the protection mechanism switch of the main body of the equipment.

[0012] The central axis of the connecting pipe, the central axis of the probe rod, and the center line of the fuse along its length coincide.

[0013] Optionally, there is a gap between the probe rod and the inner wall of the connecting tube.

[0014] Optionally, the end of the connecting pipe that is connected to the main body of the equipment is also provided with a threaded portion.

[0015] An installation device for installing the high-temperature protection device as described above, comprising:

[0016] The mounting frame includes a mounting frame body and a clamping part, wherein the clamping part is disposed on one side of the mounting frame body;

[0017] A clamping mechanism is disposed on the other side of the mounting frame body and is disposed opposite to the clamping part. A clamping space for clamping the connecting tube is formed between the clamping part and the clamping mechanism, and the connecting tube passes through the clamping space.

[0018] A spring compression handle is rotatably connected to the mounting frame body. A connecting tube is disposed at the lower part of the spring compression handle, and one end of the connecting tube is used to contact the spring compression handle, while the other end is used to pass through the clamping space and connect to the main body of the equipment.

[0019] The clamping mechanism has a preset clamping force value, which enables the connecting pipe to move along the axial direction of the connecting pipe.

[0020] Optionally, the mounting frame body includes a mounting motherboard, a first mounting side plate, and a second mounting side plate. The first mounting side plate and the second mounting side plate are respectively disposed on both sides of the mounting motherboard, and the mounting motherboard, the first mounting side plate, and the second mounting side plate are connected to form a U-shaped structure.

[0021] The mounting main board has a first threaded hole for mounting the spring compression handle, the inner side wall of the first mounting side plate is provided with the clamping part, and the second mounting side plate has a second threaded hole connected to the clamping mechanism.

[0022] Optionally, the clamping mechanism includes a clamping block, a first threaded rod, and an adjusting handle, wherein the clamping block is connected to the adjusting handle via the first threaded rod;

[0023] The first threaded rod passes through the second threaded hole, the adjusting handle is located on the outside of the second mounting side plate, the clamping block is located on the inside of the second mounting side plate, and the clamping block is used to contact the side wall of the connecting pipe.

[0024] Optionally, the side of the clamping block that contacts the connecting pipe is arc-shaped.

[0025] Optionally, the spring compression handle includes a grip handle and a second threaded rod, the second threaded rod being perpendicularly connected to the grip handle.

[0026] Optionally, the end of the second threaded rod that contacts the connecting pipe is further provided with a circular pressure plate, the diameter of which is larger than the diameter of the second threaded rod.

[0027] An installation method, applied to the installation device as described above, includes the following steps:

[0028] S100: Install the second threaded rod of the spring compression handle into the first threaded hole, and install the clamping mechanism into the second threaded hole;

[0029] S200: Install the first bolt on the connecting pipe, put the compression spring on the connecting pipe, rotate the clamping mechanism so that the clamping block of the clamping mechanism and the clamping part on the mounting frame clamp the connecting pipe, and at the same time place the compression spring between the first bolt and the clamping mechanism.

[0030] S300: Rotate the spring compression handle clockwise so that the second threaded rod abuts against the connecting pipe;

[0031] S400: Continue to rotate the spring compression handle clockwise, causing the connecting tube and probe rod to move downward toward the end away from the mounting motherboard, until the compression spring is positioned above the elongated hole;

[0032] S500: Pass the second bolt through the elongated hole and connect it to the probe rod, so that the center line of the fuse along its length coincides with the central axis of the connecting pipe;

[0033] S600: Rotate the spring compression handle counterclockwise to release the spring force of the compression spring, and rotate the adjustment handle counterclockwise to disengage the high temperature protection device from the mounting device;

[0034] S700: Inspect the high-temperature protection device so that the center line of the fuse along its length coincides with the central axis of the connecting pipe, and thread the high-temperature protection device onto the main body equipment.

[0035] As can be seen from the above technical solution, under high temperature conditions, the weld joint of the fuse breaks, and the fuse breaks into two parts. At this time, the elastic force of the compression spring is released, pushing the second bolt assembly to move away from the first bolt assembly along the axis of the connecting pipe. The second bolt assembly drives the probe rod to move away from the first bolt assembly, and the probe rod triggers the switch of the main protection mechanism of the equipment to generate a linkage effect.

[0036] Compared with the prior art, the high-temperature protection device disclosed in the embodiments of the present invention limits the release of the spring force of the compression spring to the axial direction, forming a linear thrust without lateral component force. This structure can greatly eliminate the risk of damage to the weld joint of the fuse or component jamming due to uneven force. It can not only ensure the absolute reliability of the high-temperature protection action, but also greatly avoid accidental malfunction in non-fire conditions, thereby effectively improving the safety and reliability of the entire fire protection system. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0038] Figure 1 This is a schematic diagram of the back-side mating structure of the high-temperature protection device and the mounting device disclosed in this invention;

[0039] Figure 2 This is a schematic diagram of the front-facing mating structure of the high-temperature protection device and the installation device disclosed in this invention;

[0040] Figure 3 for Figure 2 The main view;

[0041] Figure 4 for Figure 2 Side view;

[0042] Figure 5 This is a schematic diagram of the exploded structure of the high-temperature protection device disclosed in the embodiments of the present invention;

[0043] Figure 6 This is a schematic diagram of the installation frame disclosed in the embodiments of the present invention;

[0044] Figure 7 This is a schematic diagram of the clamping mechanism disclosed in the embodiments of the present invention;

[0045] Figure 8 This is a schematic diagram of the structure of the spring compression handle disclosed in the embodiment of the present invention.

[0046] Explanation of reference numerals in the attached figures:

[0047] 100. High-temperature protection device; 101. Connecting pipe; 1011. Elongated hole; 102. Detector rod; 103. First bolt assembly; 1031. First bolt; 1032. First nut; 104. Second bolt assembly; 1041. Second bolt; 1042. Second nut; 105. Compression spring; 106. Fuse;

[0048] 200. Installation device;

[0049] 201. Mounting frame; 2011. Mounting motherboard; 2012. First mounting side panel; 2013. Second mounting side panel; 2014. Clamping part;

[0050] 202. Clamping mechanism; 2021. Clamping block; 2022. First threaded rod; 2023. Adjusting handle;

[0051] 203. Spring compression handle; 2031. Grip handle; 2032. Second threaded rod. Detailed Implementation

[0052] In view of this, the core of the present invention is to provide a high-temperature protection device that can prevent unexpected breakage, thereby effectively improving the safety and reliability of the entire fire protection system.

[0053] Another key aspect of this invention is that it provides an installation device.

[0054] Another core aspect of this invention lies in providing an installation method.

[0055] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention. Please refer to [the accompanying drawings]. Figures 1-8 .

[0056] Please refer to Figures 1 to 8The high-temperature protection device 100 disclosed in this embodiment of the invention includes a connecting pipe 101 and a probe 102. The probe 102 is movably disposed inside the connecting pipe 101. The connecting pipe 101 is provided with an elongated hole 1011, which extends along the axial direction of the connecting pipe 101. One end of the connecting pipe 101 is provided with a first bolt assembly 103 connected to one end of a fuse 106. One end of the probe 102 is provided with a second bolt assembly 104 connected to the other end of the fuse 106 at a position corresponding to the elongated hole 1011. A compression spring 105 is also provided between the first bolt assembly 103 and the second bolt assembly 104. The other end of the connecting pipe 101 is provided with an opening and is connected to the main body of the equipment. The other end of the probe 102 can extend out from the inner end of the connecting pipe 101 and trigger the protection mechanism switch of the main body of the equipment.

[0057] The central axis of the connecting pipe 101, the central axis of the probe rod 102, and the center line of the fuse 106 along their length direction coincide.

[0058] Under high temperature conditions, the weld joint of the fuse 106 breaks, and the fuse 106 breaks into two parts. At this time, the elastic force of the compression spring 105 is released, pushing the second bolt assembly 104 to move away from the first bolt assembly 103 along the axis of the connecting pipe 101. The second bolt assembly 104 drives the probe rod 102 to move away from the first bolt assembly 103. The probe rod 102 triggers the switch of the main protection mechanism of the equipment to generate a linkage effect.

[0059] Compared with the prior art, the high temperature protection device 100 disclosed in the embodiments of the present invention has its spring force of compression spring 105 limited to axial release, forming a linear thrust without lateral component force. This structure can greatly eliminate the risk of damage to the weld point of fuse 106 or component jamming due to uneven force. It can not only ensure the absolute reliability of high temperature protection action, but also greatly avoid accidental malfunction in non-fire conditions, thereby effectively improving the safety and reliability of the entire fire protection system.

[0060] It should be noted that the first bolt assembly 103 disclosed in the embodiments of the present invention includes a first bolt 1031 and a first nut 1032, and the second bolt assembly 104 includes a second bolt 1041 and a second nut 1042.

[0061] As a further embodiment, please refer to Figure 5 In the embodiments of the present invention, there is a gap between the probe 102 and the inner wall of the connecting tube 101. This arrangement allows the probe 102 to slide freely within the connecting tube 101 without jamming.

[0062] As a further embodiment, the end of the connecting pipe 101 disclosed in this embodiment of the invention that is connected to the equipment body is also provided with a threaded portion. This arrangement facilitates the connection and disassembly of the high-temperature protection device 100 and the equipment body.

[0063] This invention also discloses an installation device for installing the high-temperature protection device 100 disclosed in any of the above embodiments. The installation device includes an installation frame 201, a clamping mechanism 202, and a spring compression handle 203. The installation frame 201 includes an installation frame body and a clamping part 2014, which is disposed on one side of the installation frame body. The clamping mechanism 202 is disposed on the other side of the installation frame body and is opposite to the clamping part 2014. A clamping space for clamping a connecting pipe 101 is formed between the clamping part 2014 and the clamping mechanism 202, and the connecting pipe 101 passes through the clamping space. The spring compression handle 203 is rotatably connected to the installation frame body. The connecting pipe 101 is disposed at the lower part of the spring compression handle 203, and one end of the connecting pipe 101 is used to contact the spring compression handle 203, and the other end is used to pass through the clamping space and connect to the main body of the device.

[0064] The clamping mechanism 202 has a preset clamping force value, which enables the connecting pipe 101 to move along the axial direction of the connecting pipe 101.

[0065] When installing the high-temperature protection device 100, first connect the spring compression handle 203 to the mounting frame 201, then connect the clamping mechanism 202 to the mounting frame 201. Next, install the first bolt 1031 onto the connecting pipe 101, and then sleeve the compression spring 105 onto the connecting pipe 101. Rotate the clamping mechanism 202 so that the clamping block 2021 of the clamping mechanism 202 and the clamping part 2014 on the mounting frame 201 clamp the connecting pipe 101, while simultaneously placing the compression spring 105 between the first bolt 1031 and the clamping mechanism 202. Rotate the spring compression handle 203 clockwise so that the spring compression handle 203 abuts against the connecting pipe 101. Continue rotating the spring compression handle 203 clockwise so that the connecting pipe 101... Move the probe 101 and probe 102 downwards toward the end away from the mounting frame 201 until the compression spring 105 is placed above the elongated hole 1011. Then, pass the second bolt 1041 through the elongated hole 1011 and connect it to the probe 102, so that the center line of the fuse 106 along its length direction coincides with the central axis of the connecting pipe 101. Finally, rotate the spring compression handle 203 counterclockwise to release the spring force of the compression spring 105. Rotate the clamping mechanism 202 counterclockwise to disengage the high temperature protection device 100 from the mounting device 200. Check that the high temperature protection device 100 is free from deformation and cracks, so that the center line of the fuse 106 along its length direction coincides with the central axis of the connecting pipe 101. Thread the high temperature protection device 100 onto the main equipment.

[0066] Compared with the prior art, the installation device 200 disclosed in the embodiments of the present invention can realize fully automatic installation, which can not only improve installation efficiency, but also improve installation quality, and prevent unexpected breakage, thereby effectively improving the safety and reliability of the entire fire protection system.

[0067] As a further embodiment, please refer to Figure 6 The mounting frame body disclosed in the embodiments of the present invention includes a mounting motherboard 2011, a first mounting side plate 2012 and a second mounting side plate 2013. The first mounting side plate 2012 and the second mounting side plate 2013 are respectively disposed on both sides of the mounting motherboard 2011, and the mounting motherboard 2011, the first mounting side plate 2012 and the second mounting side plate 2013 are connected to form a U-shaped structure.

[0068] The mounting main board 2011 has a first threaded hole for mounting the spring compression handle 203, the inner side wall of the first mounting side plate 2012 is provided with a clamping part 2014, and the second mounting side plate 2013 has a second threaded hole connected to the clamping mechanism 202.

[0069] As a further embodiment, please refer to Figure 7 The clamping mechanism 202 disclosed in the embodiments of the present invention includes a clamping block 2021, a first threaded rod 2022 and an adjusting handle 2023. The clamping block 2021 is connected to the adjusting handle 2023 through the first threaded rod 2022.

[0070] The first threaded rod 2022 passes through the second threaded hole, the adjusting handle 2023 is located on the outside of the second mounting side plate 2013, and the clamping block 2021 is located on the inside of the second mounting side plate 2013, and the clamping block 2021 is used to contact the side wall of the connecting pipe 101.

[0071] When the adjusting handle 2023 is rotated, the engagement of the first threaded rod 2022 with the second threaded hole will cause the first threaded rod 2022 to move in a straight line, so as to move closer to or further away from the connecting pipe 101.

[0072] In order to better fit the clamping block with the connecting pipe 101, the side of the clamping block that contacts the connecting pipe 101 disclosed in the embodiments of the present invention is arc-shaped.

[0073] The embodiments of the present invention do not limit the specific structure of the spring compression handle 203. Any structure that meets the usage requirements of the present invention is within the protection scope of the present invention.

[0074] As one embodiment, please refer to Figure 8The spring compression handle 203 disclosed in the embodiments of the present invention includes a grip handle 2031 and a second threaded rod 2032. The second threaded rod 2032 is vertically connected to the grip handle 2031. This structure facilitates operation when installing and removing the fuse 106.

[0075] As a further embodiment, the installation device 200 disclosed in this embodiment of the invention is further provided with a circular pressure plate at the end of the second threaded rod 2032 that contacts the connecting pipe 101, wherein the diameter of the circular pressure plate is larger than the diameter of the second threaded rod 2032. This arrangement facilitates improved stability when pressing down on the connecting pipe 101.

[0076] This invention also discloses an installation method, applied to the installation device disclosed in any of the above embodiments, comprising the following steps:

[0077] S100: Install the second threaded rod 2032 of the spring compression handle 203 into the first threaded hole, and install the clamping mechanism 202 into the second threaded hole;

[0078] S200: Install the first bolt 1031 on the connecting pipe 101, sleeve the compression spring 105 on the connecting pipe 101, rotate the clamping mechanism 202 so that the clamping block 2021 of the clamping mechanism 202 and the clamping part 1041 on the mounting frame 201 clamp the connecting pipe 101, and at the same time place the compression spring 105 between the first bolt 1031 and the clamping mechanism 202;

[0079] S300: Rotate the spring compression handle 203 clockwise so that the second threaded rod 2032 abuts against the connecting pipe 101;

[0080] S400: Continue to rotate the spring compression handle 203 clockwise, so that the connecting tube 101 and the probe rod 102 move downward toward the end away from the mounting main board 2011, until the compression spring 105 is placed above the elongated hole 1011;

[0081] S500: Pass the second bolt 1041 through the elongated hole 1011 and connect it to the probe rod 102, so that the center line of the fuse 106 along its length direction coincides with the central axis of the connecting pipe 101;

[0082] S600: Rotate the spring compression handle 203 counterclockwise to release the spring force of the compression spring 105, and rotate the adjusting handle 2023 counterclockwise to disengage the high temperature protection device 100 from the mounting device 200.

[0083] S700: Check the high temperature protection device 100 so that the center line of the fuse 106 along its length direction coincides with the central axis of the connecting pipe 101, and thread the high temperature protection device 100 to the main equipment.

[0084] Compared with the prior art, the installation device disclosed in the embodiments of the present invention can achieve fully automatic installation, which can not only improve installation efficiency but also improve installation quality, and prevent unexpected breakage, thereby effectively improving the safety and reliability of the entire fire protection system.

[0085] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the term "comprising" or any other variation thereof is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0086] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0087] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An installation device for installing a high-temperature protection device, characterized in that, The high-temperature protection device includes a connecting pipe and a detection rod. The detection rod is movably disposed inside the connecting pipe. The connecting pipe is provided with an elongated hole that extends along the axial direction of the connecting pipe. One end of the connecting tube is provided with a first bolt assembly connected to one end of the fuse, and one end of the probe is provided with a second bolt assembly connected to the other end of the fuse at the position corresponding to the elongated hole. A compression spring is also provided between the first bolt assembly and the second bolt assembly. The other end of the connecting pipe is provided with an opening and is connected to the main body of the equipment. The other end of the probe rod can extend out of the connecting pipe and trigger the protection mechanism switch of the main body of the equipment. There is a gap between the probe rod and the inner wall of the connecting pipe; The end of the connecting pipe that is connected to the main body of the equipment is also provided with a threaded part; The installation device includes: The mounting frame includes a mounting frame body and a clamping part, wherein the clamping part is disposed on one side of the mounting frame body; A clamping mechanism is disposed on the other side of the mounting frame body and is disposed opposite to the clamping part. A clamping space for clamping the connecting tube is formed between the clamping part and the clamping mechanism, and the connecting tube passes through the clamping space. A spring compression handle is rotatably connected to the mounting frame body. A connecting tube is disposed at the lower part of the spring compression handle, and one end of the connecting tube is used to contact the spring compression handle, while the other end is used to pass through the clamping space and connect to the main body of the device. The clamping mechanism has a preset clamping force value, which enables the connecting pipe to move along the axial direction of the connecting pipe.

2. The installation device according to claim 1, characterized in that, The mounting frame body includes a mounting motherboard, a first mounting side plate, and a second mounting side plate. The first mounting side plate and the second mounting side plate are respectively disposed on both sides of the mounting motherboard, and the mounting motherboard, the first mounting side plate, and the second mounting side plate are connected to form a U-shaped structure. The mounting main board has a first threaded hole for mounting the spring compression handle, the inner side wall of the first mounting side plate is provided with the clamping part, and the second mounting side plate has a second threaded hole connected to the clamping mechanism.

3. The installation device according to claim 2, characterized in that, The clamping mechanism includes a clamping block, a first threaded rod, and an adjusting handle, wherein the clamping block is connected to the adjusting handle via the first threaded rod; The first threaded rod passes through the second threaded hole, the adjusting handle is located on the outside of the second mounting side plate, the clamping block is located on the inside of the second mounting side plate, and the clamping block is used to contact the side wall of the connecting pipe.

4. The installation device according to claim 3, characterized in that, The side of the clamping block that contacts the connecting pipe is arc-shaped.

5. The installation device according to claim 4, characterized in that, The spring compression handle includes a grip handle and a second threaded rod, the second threaded rod being perpendicularly connected to the grip handle.

6. The installation device according to claim 5, characterized in that, The end of the second threaded rod that contacts the connecting pipe is also provided with a circular pressure plate, the diameter of which is larger than the diameter of the second threaded rod.

7. An installation method, applied to the installation device as described in claim 6, characterized in that, Includes the following steps: S100: Install the second threaded rod of the spring compression handle into the first threaded hole, and install the clamping mechanism into the second threaded hole; S200: Install the first bolt assembly onto the connecting pipe, sleeve the compression spring onto the connecting pipe, rotate the clamping mechanism so that the clamping block of the clamping mechanism and the clamping part on the mounting frame clamp the connecting pipe, while the compression spring is placed between the first bolt assembly and the clamping mechanism. S300: Rotate the spring compression handle clockwise so that the second threaded rod abuts against the connecting pipe; S400: Continue to rotate the spring compression handle clockwise, so that the connecting tube and the probe rod move downward toward the end away from the mounting motherboard, until the compression spring is placed at the top of the elongated hole; S500: Connect the second bolt assembly through the elongated hole to the probe rod; S600: Rotate the spring compression handle counterclockwise and the adjustment handle counterclockwise to disengage the high-temperature protection device from the installation device; S700: Inspect the high temperature protection device and thread the high temperature protection device onto the main body of the equipment.

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