Temperature probe fixing device and fixing method

Abstract

This disclosure belongs to the field of nuclear power technology, specifically relating to a temperature probe fixing device and method. The temperature probe fixing device provided by this disclosure uses an adjustable rack and pinion mechanism in conjunction with a gear rotating seat to adjust the installation angle of the temperature probe, and an adjusting ring in conjunction with a limiting seat to adjust the detection direction. While enabling rapid installation and removal of the temperature probe, it maintains the sealed integrity of the detection space at all times. Whether for routine maintenance or emergency repairs, there is no need to open the detection space, avoiding the sealing problems caused by opening the space, effectively ensuring the stability and safety of the system, and providing reliable safety assurance for temperature monitoring in special environments. Compared with traditional fixing methods, it allows for flexible adjustment of the detection position, improving the accuracy and efficiency of temperature monitoring.

Description

Technical Field

[0001] This invention belongs to the field of nuclear power technology, specifically relating to a temperature probe fixing device and fixing method. Background Technology

[0002] Temperature sensors can be defined as devices that convert temperature changes into measurable electrical signals (such as voltage, current, or resistance values), and they are widely used in industrial control, environmental monitoring, smart homes, and other fields.

[0003] Related technologies widely employ modular temperature probe designs, characterized by electrical connections between the probe and the main unit via cables and connectors. This split structure is particularly suitable for monitoring scenarios in confined or enclosed spaces: the compact probe can be flexibly deployed in space-constrained locations, while the main unit is installed in the peripheral area, exchanging data via connecting cables. This design maintains the precise measurement capabilities of the sensor's core components while solving installation challenges in complex environments through modular layout, ensuring the system's reliability and maintainability in space-constrained scenarios.

[0004] Currently, modular temperature probes are typically fixed to a bracket with bolts, and the bracket is welded into the detection space, while the main unit is located externally for maintenance. However, when the temperature probe needs replacement or maintenance, the detection space must be opened for disassembly and assembly, which not only makes the maintenance process cumbersome, time-consuming, and labor-intensive, but also may compromise the airtightness of the detection space due to frequent opening and closing, affecting the stability and safety of the system. Furthermore, in toxic, flammable, or radiation environments, forcibly opening the detection space may pose safety hazards or pollution risks, severely restricting the reliability and maintenance efficiency of temperature monitoring systems. Therefore, there is an urgent need to improve the efficiency and safety of temperature probe disassembly and assembly. Summary of the Invention

[0005] To overcome the problems existing in related technologies, a temperature probe fixing device and fixing method are provided.

[0006] According to one aspect of the present disclosure, a temperature probe fixing device is provided, the device comprising: a temperature probe, a housing, a piston, a mounting slot plate, a gear rotation mechanism, and a fixing cylinder;

[0007] The outer surface of the temperature probe is fixedly fitted with a second connecting bolt. One end of the temperature probe is fixedly connected to a cable. The outer surface of the cable is slidably connected to a first connecting bolt. The outer surface of the first connecting bolt is threadedly connected to a piston. One end of the piston is fixedly connected to one end of the housing, and the other end of the piston is fixedly connected to one end of the mounting slot plate.

[0008] The gear rotation mechanism includes: a mounting base, a support shaft, a gear, a rack, a slide rod, a movable block, and a knob; the upper part of the mounting base is threaded onto the outer surface of the second connecting bolt, the bottom of the mounting base is fixedly connected to the top of the gear via the support shaft, the support shaft is rotatably connected to the upper surface of the housing, the meshing gear and rack are disposed inside the housing, the movable block and screw are disposed inside the mounting slot plate, the rack is fixedly connected to one end of the movable block via the slide rod, the slide rod passes through the piston and is slidably connected to the piston; the other end of the movable block is threadedly connected to the screw, the end of the screw that extends out of the other side of the mounting slot plate is fixedly connected to the knob, and the knob is rotatably connected to the outside of the mounting slot plate;

[0009] The piston is slidably sleeved with a fixed cylinder. The mounting groove plate is set inside the fixed cylinder. A hinged closing plate is installed at the end of the fixed cylinder near the temperature probe. The hinged closing plate includes a fixed seat, a spring return hinge, and a sealing plate. The fixed seat is fixedly installed on the outer side of the end of the fixed cylinder. A spring return hinge is fixedly installed on one inner wall of the fixed seat. The other mounting end of the spring return hinge is fixedly connected to the sealing plate.

[0010] The wall separates the detection space from the external space. The fixing cylinder is installed through the wall. The temperature probe, the second connecting bolt, and the hinged closing plate are located inside the detection space, while the other end of the mounting slot plate is located outside the detection space.

[0011] In one possible implementation, a limiting seat is provided on the outer surface of the fixed cylinder. The limiting seat is located outside the detection space. The limiting seat includes a fixed ring, a movable ring, a mounting base, and a guide handle. The fixed ring is fixedly sleeved on the outer surface of the fixed cylinder, and the fixed ring is provided with circumferential grooves facing the inner surface of the fixed cylinder.

[0012] The movable ring is rotatably sleeved on the outside of the fixed cylinder. The mounting base is fixedly installed on the outer surface of the movable ring. A through hole is opened on the side wall of the mounting base. The guide handle includes a first half and a second half. The first half and the second half are fixedly connected in an L-shape. The first half is slidably connected in the through hole of the mounting base. The end of the first half facing the fixed ring is fixedly connected to the mounting plate. The side of the mounting plate facing the fixed ring is fixedly connected to the limiting tooth, and the limiting tooth matches the tooth groove.

[0013] In one possible implementation, the outer surface of the knob rotates to engage with a scale, and the scale is fixedly connected to the outside of the mounting slot plate. One rotation of the gear corresponds to a specific graduation value of the scale.

[0014] In one possible implementation, a sealing structure is provided between the gap between the first connecting bolt and the outer surface of the cable; a sealing structure is provided between the support shaft and the housing; and a sealing gasket is provided at the edge of the sealing plate to form a seal with the end face of the fixed cylinder.

[0015] In one possible implementation, the spring-return hinge employs a spring hinge structure, in which the spring-return hinge drives the sealing plate to close with a spring force of greater than or equal to 5N when the mounting slot plate and temperature probe are pulled out.

[0016] In one possible implementation, multiple compression springs connect the mounting plate and the mounting base.

[0017] In one possible implementation, the grooves of the retaining ring are designed with 15° equal divisions to match the sawtooth profile of the limiting teeth.

[0018] In one possible implementation, a fixing bolt is disposed through the side wall of the movable ring, and multiple screw holes are evenly provided at the bottom of the mounting slot plate. Each screw hole matches the fixing bolt. When the fixing bolt is threadedly connected to different screw holes, the temperature probe is fixed at different depths within the detection space.

[0019] In one possible implementation, the gear is restricted to rotating within a preset angle range, such that when the knob is turned, the swing angle of the temperature probe is between 0-360° and does not contact the wall.

[0020] According to another aspect of the present disclosure, a method for fixing a temperature probe is provided, the method comprising:

[0021] Step 1, Installation Preparation: Insert the fixing cylinder through and fix it in the wall between the detection space and the external space, so that the second connecting bolt and the hinged closing plate are located inside the detection space, and the other end of the mounting slot plate and the limiting seat are located in the external space;

[0022] Step 2, Probe assembly: Pass the temperature probe through the gear rotation mechanism and fix the second connecting bolt, which is fixed to the outer surface of the temperature probe, to the gear rotation mechanism with threads. The first connecting bolt on the cable is fixedly connected to the piston seal.

[0023] Step 3, Fixing and Adjusting: Insert the assembled temperature probe and piston into the fixing cylinder until the set depth. Then, fix the position of the piston by fixing bolts and mounting slot plate, and adjust the installation angle of the temperature probe by knob and gear rotation mechanism. Finally, adjust the detection direction of the temperature probe by limit seat.

[0024] Step 4, Probe disassembly: Release the lock on the mounting plate, pull out each component by pulling out the mounting plate. During the extraction process, the hinged closing plate seals the end of the fixed cylinder. Then, remove the cable and temperature probe in sequence.

[0025] The beneficial effects of this disclosure are as follows: The temperature probe fixing device provided by this disclosure, through the cooperation of an adjustable rack and pinion and a gear rotating seat, allows for adjustment of the installation angle of the temperature probe; the adjusting ring and the limiting seat allow for adjustment of the detection direction; the mounting slot plate, piston, and housing constitute an integral frame for fixing the temperature probe, facilitating the overall assembly and disassembly of the temperature probe; the hinged closing plate can open when the temperature probe is inserted into the detection space and quickly close when the temperature probe is pulled out, thus achieving both rapid assembly and disassembly of the temperature probe and maintaining the sealing integrity of the detection space. Whether for routine maintenance or emergency repairs, there is no need to open the detection space, avoiding the sealing damage caused by opening the space, effectively ensuring the stability and safety of the system, and providing reliable safety assurance for temperature monitoring in special environments. Compared with traditional fixing methods, the detection position of the temperature probe can be flexibly adjusted without opening the monitoring space, improving the accuracy and efficiency of temperature monitoring. Attached Figure Description

[0026] Figure 1 This is a perspective view of a temperature probe fixing device shown in an embodiment of this disclosure.

[0027] Figure 2 This is a partial perspective view of a temperature probe fixing device shown in an embodiment of this disclosure.

[0028] Figure 3 This is a cross-sectional view of a gear rotation mechanism shown in an embodiment of this disclosure.

[0029] Figure 4 yes Figure 2 Enlarged view of point B in the middle.

[0030] Figure 5 This is a perspective view of a hinged closure plate shown in an embodiment of this disclosure.

[0031] Figure 6 yes Figure 1 Enlarged view of point A in the middle.

[0032] Figure 7 This is a schematic diagram of the installation of a temperature probe fixing device according to an embodiment of the present disclosure.

[0033] In the picture:

[0034] 1. Temperature probe; 11. Cable; 12. Second connecting bolt; 13. First connecting bolt; 2. Housing;

[0035] 31. Sealing plate; 32. Spring return hinge; 33. Fixing base; 4. Fixing cylinder; 41. Tooth groove;

[0036] 42. Retaining ring; 5. Fixing bolt; 61. Mounting base; 62. Support shaft; 63. Gear;

[0037] 7. Piston; 81. Slide rod; 82. Moving block; 83. Screw; 84. Dial; 85. Knob;

[0038] 86. Rack; 9. Mounting slot; 91. Screw hole; 101. Mounting plate; 102. Limiting tooth;

[0039] 103. Guide handle; 104. Mounting base; 105. Compression spring; 106. Moving ring. Detailed Implementation

[0040] The present disclosure will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0041] Unless otherwise defined, the technical and scientific terms used in this disclosure have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure pertains; the terminology used in this disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of this disclosure; the term "comprising" and any variations thereof in this disclosure are intended to cover non-exclusive inclusion. Clearly, the embodiments described in this disclosure are only a part of the embodiments of this disclosure, and not all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of this disclosure without inventive effort are within the scope of protection of this disclosure.

[0042] In this disclosure, the reference to "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this disclosure. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0043] Figure 1 This is a perspective view of a temperature probe fixing device shown in an embodiment of this disclosure, such as... Figure 1 The device includes: a temperature probe 1, a housing 2, a piston 7, a mounting slot 9, a gear rotation mechanism, and a fixed cylinder 4.

[0044] A second connecting bolt 12 is fixedly sleeved on the outer surface of the temperature probe 1. One end of the temperature probe 1 is fixedly connected to a cable 11. A first connecting bolt 13 is slidably connected to the outer surface of the cable 11. A piston 7 is threadedly connected to the outer surface of the first connecting bolt 13. A sealing structure (such as an O-ring) is provided in the gap between the first connecting bolt 13 and the outer surface of the cable 11 to prevent the medium from seeping in from between the first connecting bolt 13 and the outer surface of the cable 11. One end of the piston 7 is fixedly connected to one end of the housing 2, and the other end of the piston 7 is fixedly connected to one end of the mounting slot plate 9.

[0045] The temperature probe 1 is rigidly fixed to the fixing device via the second connecting bolt 12, ensuring stability even under vibration. The sealed sliding fit design between the cable 11 and the first connecting bolt 13 allows for axial movement adjustment of the temperature probe 1 while preventing media ingress through the sealing structure. The threaded connection between the piston 7 and the first connecting bolt 13 further enhances the sealing performance, making it suitable for high-pressure or corrosive environments. This structure achieves a balance between quick assembly and disassembly of the temperature probe and high sealing performance.

[0046] like Figures 1 to 4 As shown, the gear rotation mechanism includes: a mounting base 61, a support shaft 62, a gear 63, a rack 86, a slide bar 81, a movable block 82, and a knob 85. The upper part of the mounting base 61 is threaded onto the outer surface of the second connecting bolt 12, and the bottom of the mounting base 61 is fixedly connected to the top of the gear 63 via the support shaft 62. For example, the mounting base 61 includes a first part and a second part, which are arranged perpendicularly to each other. The threaded through hole in the first part is threaded onto the outer surface of the second connecting bolt 12, so that the mounting base 61 is locked to the second connecting bolt 12 by threads, forming a rigid connection capable of bearing torque. The bottom of the second section is fixedly connected to the top of the support shaft 62. The support shaft 62 passes through the housing 2 and is rotatably connected to the surface of the housing 2. The bottom of the support shaft 62 is fixedly connected to the top of the gear 63. The gear 63 and the rack 86 are arranged inside the housing 2. The gear 63 is meshed with one end of the rack 86. The other end of the rack 86 is fixedly connected to one end of the slide rod 81. The slide rod 81 passes through the housing 2 and the piston 7 and is slidably connected to the piston 7. The other end of the slide rod 81 is fixedly connected to the movable block 82.

[0047] The movable block 82 and the screw 83 are disposed within the mounting slot 9. The knob 85 is rotatably connected to the outer side of the other end of the mounting slot 9. The screw 83 is threadedly connected to the movable block 82, and the knob 85 and the end of the screw 83 protruding from the side wall of the mounting slot 9 are fixedly connected. When the knob 85 is rotated, the screw 83 moves linearly. When the screw 83 moves linearly, it pushes the movable block 82, which in turn drives the slide bar 81 and the rack 86 to move linearly. This causes the rack 86 to drive the gear 63, which in turn drives the support shaft 62 and the mounting base 61 to rotate. This, in turn, drives the second connecting bolt 12 to cause the temperature probe 1 to swing in a fan shape. Thus, the detection angle of the temperature probe 1 can be adjusted by rotating the knob 85.

[0048] In one possible implementation, the gear is set to rotate within a preset angle range, such that the swing angle of the temperature probe is less than 360° and there is no contact with the wall. For example, a limiting component can be set separately for the gear or the rack, or a mutually cooperating limiting component can be set between the gear and the rack, so that when the gear is driven by the rack, it can only rotate within the preset angle range. When the rotation angle of the gear exceeds the preset angle range, the gear will be stopped by the limiting component and will no longer rotate. Appropriate components such as positioning pins or limiting blocks can be selected as limiting components as needed. This disclosure does not limit the type of limiting component. In addition, the preset angle range can be, for example, 0-180°, 0-270° or 0-360°. The specific value of the preset angle range can be adjusted according to the actual detection needs, as long as the swing angle of the temperature probe is less than 360° and there is no contact with the wall. This disclosure does not limit this. In this way, this disclosure can effectively prevent the temperature probe from swinging too much, causing the cable to become entangled with the gear rotation mechanism, or the temperature probe to collide with the wall.

[0049] In one possible implementation, the outer surface of the knob 85 is rotatably fitted with a dial 84, which is fixedly connected to the outside of the mounting slot 9. One rotation of the gear 63 corresponds to a specific graduation value on the dial 84. By referring to the dial 84, the rotation angle of the gear 63 can be precisely controlled. In one application example, an angle adjustment accuracy of 0.1° can be achieved, and the dial 84 can also provide a traceable positioning reference.

[0050] In one possible implementation, a sealing structure (e.g., an O-ring) is provided between the support shaft 62 and the housing 2, allowing the gear 63 to rotate freely within the sealed cavity while isolating external contamination. This integrates the probe angle adjustment function within a sealed space, preventing external environmental interference with transmission accuracy.

[0051] like Figure 5As shown, the piston 7 is slidably sleeved onto the fixed cylinder 4. The mounting slot plate 9 is disposed inside the fixed cylinder 4. A hinged closing plate is installed at one end of the fixed cylinder 4 near the temperature probe 1. The hinged closing plate includes a fixed seat 33, a spring-return hinge 32, and a sealing plate 31. The fixed seat 33 is fixedly installed on the outer side of the end of the fixed cylinder 4. The spring-return hinge 32 is fixedly installed on one inner wall of the fixed seat 33, and the sealing plate 31 is fixedly connected to the other end of the spring-return hinge 32. The spring-return hinge 32 can be, for example, a stainless steel spring hinge structure. When the mounting slot plate 9 is pulled out from the end of the fixed cylinder 4, the hinged closing plate can drive the sealing plate 31 to close instantaneously with a spring force greater than or equal to 5N when the mounting slot plate 9 carrying the temperature probe 1 is pulled out of the fixed cylinder 4. The sealing plate 31 has a high-temperature resistant silicone pad embedded at its edge, forming an IP67-level seal with the end face of the fixed cylinder 4. This design meets the requirements for rapid maintenance while ensuring the airtightness of the process system when the equipment is offline.

[0052] like Figure 6 As shown, the outer surface of the fixed cylinder 4 is integrally designed with a limiting seat. The limiting seat includes a fixed ring 42, a movable ring 106, an assembly seat 104, and a guide handle 103. The fixed ring 42 is fixedly sleeved on the outer surface of the fixed cylinder 4, and the fixed ring 42 is provided with a toothed groove 41 circumferentially facing the inner surface of the fixed cylinder 4.

[0053] The movable ring 106 is rotatably sleeved on the outside of the fixed cylinder 4. The mounting base 104 is fixedly installed on the outer surface of the movable ring 106. The side wall of the mounting base 104 has a through hole. The guide handle 103 includes a first half and a second half. The first half and the second half are fixedly connected perpendicularly to each other. The first half is slidably connected in the through hole of the mounting base 104. The end of the first half facing the fixed ring 42 is fixedly connected to the mounting plate 101. The side of the mounting plate 101 facing the fixed ring 42 is fixedly connected to the limiting tooth 102. The limiting tooth 102 matches the tooth groove 41. A plurality of compression springs 105 are connected between the mounting plate 101 and the mounting base 104.

[0054] See Figure 7 The detection space is separated from the external space by a wall. The fixed cylinder 4 is installed through the wall. The temperature probe 1, the second connecting bolt 12, and the hinged closing plate are located inside the detection space. The other end of the mounting slot plate 9 and the limit seat are located outside the detection space.

[0055] In one possible implementation, the grooves 41 of the retaining ring 42 are designed with 15° equal divisions to match the sawtooth profile of the limiting teeth 102. A compression spring 105 provides a continuous clamping force of 8-12N, ensuring that the limiting teeth 102 remain engaged with the grooves 41 of the retaining ring 42 even under vibration conditions. The sliding stroke of the guide handle 103 (approximately 10mm) ensures complete disengagement from the grooves 41. This structure achieves 16 circumferential positioning points with a positioning repeatability accuracy of ±0.5°.

[0056] like Figure 1 As shown, the movable ring 106 is provided with a fixing bolt 5 that penetrates the side wall of the movable ring 106. Multiple screw holes 91 are evenly distributed at the bottom of the mounting plate 9, each screw hole 91 matching the fixing bolt 5. When the fixing bolt 5 is threadedly connected to different screw holes 91, the temperature probe 1 is fixed at different insertion depths. In one possible implementation, the multiple screw holes 91 of the mounting plate 9 are arranged in an array with a 10mm spacing, achieving an adjustable insertion depth of 5-50mm in conjunction with the fixing bolt 5. The fixing bolt can employ an anti-loosening nylon insert design to maintain locking force even under vibration.

[0057] The temperature probe fixing device disclosed herein achieves a unified design of quick assembly and disassembly with high-pressure sealing through a combined sealed connection of the temperature probe via a first connecting bolt, a second connecting bolt, a piston, and a gear rotating seat. The coordinated operation of the gear rotating mechanism and the limiting seat enables dual precision adjustment of the temperature probe angle (e.g., 0.1° accuracy) and circumferential direction (e.g., 16 positioning points ±0.5°). The automatic closing mechanism of the protective hinged closing plate when the probe is withdrawn (e.g., IP67 level sealing), and the sliding sealing fit structure between the fixing cylinder 4 and the piston 7, eliminate the need to open the detection space for both routine maintenance and emergency repairs, avoiding sealing defects caused by opening the space. This effectively ensures the stability and safety of the system, providing reliable safety assurance for temperature monitoring in special environments.

[0058] In one possible implementation, a method for fixing a temperature probe is provided, the method comprising:

[0059] Step 1, Installation preparation: Fix the fixed cylinder 4 through welding or flange connection and fix it in the wall between the detection space and the external space, so that the second connecting bolt 12 and the hinged closing plate are located inside the detection space, and the other end of the mounting slot plate 9 and the limit seat are located outside the detection space.

[0060] Step 2, probe assembly: Pass the temperature probe 1 through the gear rotation mechanism and fix it with the thread. The first connecting bolt 13 on the cable 11 is sealed and fixedly connected to the piston 7.

[0061] Step 3, Fixing and Adjustment: Insert the assembled temperature probe 1, piston 7 and other components into the fixing cylinder 4 until the set depth is reached. Then, fix the position of piston 7 by fixing bolts 5 and mounting slot plate 9. Adjust the installation angle of temperature probe 1 by knob 85 and gear rotation mechanism. Then, adjust the detection direction of temperature probe 1 by limit seat.

[0062] Step 4, probe disassembly: Release the lock on the mounting slot plate 9, pull out each component. During the extraction process, the hinged closing plate seals the end of the fixed cylinder 4. Then, remove the cable 11 and temperature probe 1 in sequence.

[0063] The method described above has been explained in detail in the description of the device, and will not be repeated here.

[0064] The various embodiments of this disclosure have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A temperature probe fixing device, characterized in that, The device includes: a temperature probe, a housing, a piston, a mounting slot plate, a gear rotation mechanism, and a fixed cylinder; The outer surface of the temperature probe is fixedly fitted with a second connecting bolt. One end of the temperature probe is fixedly connected to a cable. The outer surface of the cable is slidably connected to a first connecting bolt. The outer surface of the first connecting bolt is threadedly connected to a piston. One end of the piston is fixedly connected to one end of the housing, and the other end of the piston is fixedly connected to one end of the mounting slot plate. The gear rotation mechanism includes: a mounting base, a support shaft, a gear, a rack, a slide rod, a movable block, and a knob; the upper part of the mounting base is threaded onto the outer surface of the second connecting bolt, the bottom of the mounting base is fixedly connected to the top of the gear via the support shaft, the support shaft is rotatably connected to the upper surface of the housing, the meshing gear and rack are disposed inside the housing, the movable block and screw are disposed inside the mounting slot plate, the rack is fixedly connected to one end of the movable block via the slide rod, the slide rod passes through the piston and is slidably connected to the piston; the other end of the movable block is threadedly connected to the screw, the end of the screw that extends out of the other side of the mounting slot plate is fixedly connected to the knob, and the knob is rotatably connected to the outside of the mounting slot plate; The piston is slidably sleeved with a fixed cylinder. The mounting groove plate is set inside the fixed cylinder. A hinged closing plate is installed at the end of the fixed cylinder near the temperature probe. The hinged closing plate includes a fixed seat, a spring return hinge, and a sealing plate. The fixed seat is fixedly installed on the outer side of the end of the fixed cylinder. A spring return hinge is fixedly installed on one inner wall of the fixed seat. The other mounting end of the spring return hinge is fixedly connected to the sealing plate. The wall separates the detection space from the external space. The fixing cylinder is installed through the wall. The temperature probe, the second connecting bolt, and the hinged closing plate are located inside the detection space, while the other end of the mounting slot plate is located outside the detection space.

2. The apparatus according to claim 1, characterized in that, A limiting seat is provided on the outer surface of the fixed cylinder. The limiting seat is located outside the detection space. The limiting seat includes a fixed ring, a movable ring, an assembly seat, and a guide handle. The fixed ring is fixedly sleeved on the outer surface of the fixed cylinder, and the fixed ring is provided with toothed grooves circumferentially facing the inner surface of the fixed cylinder. The movable ring is rotatably sleeved on the outside of the fixed cylinder. The mounting base is fixedly installed on the outer surface of the movable ring. A through hole is opened on the side wall of the mounting base. The guide handle includes a first half and a second half. The first half and the second half are fixedly connected in an L-shape. The first half is slidably connected in the through hole of the mounting base. The end of the first half facing the fixed ring is fixedly connected to the mounting plate. The side of the mounting plate facing the fixed ring is fixedly connected to the limiting tooth, and the limiting tooth matches the tooth groove.

3. The apparatus according to claim 1, characterized in that, The outer surface of the knob rotates to engage with the dial, which is fixedly connected to the outside of the mounting slot plate. One rotation of the gear corresponds to a specific graduation value of the dial.

4. The apparatus according to claim 1, characterized in that, A sealing structure is provided between the first connecting bolt and the outer surface of the cable; a sealing structure is provided between the support shaft and the housing; a sealing gasket is provided at the edge of the sealing plate to form a seal with the end face of the fixed cylinder.

5. The apparatus according to claim 1, characterized in that, The spring-return hinge adopts a spring hinge structure. When the mounting plate and temperature probe are pulled out, the spring-return hinge drives the sealing plate to close with a spring force of greater than or equal to 5N.

6. The apparatus according to claim 2, characterized in that, Multiple compression springs connect the mounting plate and the mounting base.

7. The apparatus according to claim 2, characterized in that, The grooves of the retaining ring are designed with 15° equal division, which matches the sawtooth profile of the limiting teeth.

8. The apparatus according to claim 2, characterized in that, The fixing bolts are installed through the side wall of the movable ring. Multiple screw holes are evenly opened at the bottom of the mounting slot plate. Each screw hole matches the fixing bolt. When the fixing bolts are threaded to different screw holes, the temperature probe is fixed at different depths in the detection space.

9. The apparatus according to claim 1, characterized in that, The gear is restricted to rotating within a preset angle range, so that when the knob is turned, the swing angle of the temperature probe is between 0-360° and there is no contact with the wall.

10. A method for fixing a temperature probe, characterized in that, The method includes: Step 1, Installation Preparation: Insert the fixing cylinder through and fix it in the wall between the detection space and the external space, so that the second connecting bolt and the hinged closing plate are located inside the detection space, and the other end of the mounting slot plate and the limiting seat are located in the external space; Step 2, Probe assembly: Pass the temperature probe through the gear rotation mechanism and fix the second connecting bolt, which is fixed to the outer surface of the temperature probe, to the gear rotation mechanism with threads. The first connecting bolt on the cable is fixedly connected to the piston seal. Step 3, Fixing and Adjusting: Insert the assembled temperature probe and piston into the fixing cylinder until the set depth. Then, fix the position of the piston by fixing bolts and mounting slot plate, and adjust the installation angle of the temperature probe by knob and gear rotation mechanism. Finally, adjust the detection direction of the temperature probe by limit seat. Step 4, Probe disassembly: Release the lock on the mounting plate, pull out each component by pulling out the mounting plate. During the extraction process, the hinged closing plate seals the end of the fixed cylinder. Then, remove the cable and temperature probe in sequence.

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