Multi-layer protective thermistor sealing structure and sealing method thereof

Abstract

The present application relates to a kind of sealing structure, in particular, to a kind of multilayer protective thermistor sealing structure and sealing method thereof.It includes outer sleeve and the main seal and secondary seal installed in outer sleeve, resistance body is arranged in the outer sleeve, the main seal is arranged in outer sleeve, the secondary seal is arranged in main seal, the main seal is formed with temperature measuring channel between outer sleeve, the secondary seal and main seal, the outer sleeve is located in the temperature measuring channel of outer layer, in the multilayer protective thermistor sealing structure and sealing method thereof, by resistance body being arranged in the outermost layer of multilayer sealing structure to ensure the accuracy of measurement, and when liquid leakage occurs in the outermost layer, resistance body is guided to next layer by the action of liquid level difference, in this way, not only the influence of multilayer structure on the accuracy of resistance body measurement is reduced, but also the end of resistance body is protected and sealed.

Description

Technical Field

[0001] This invention relates to a sealing structure, and more specifically, to a multi-layer protective resistance temperature detector (RTD) sealing structure and its sealing method. Background Technology

[0002] Resistance temperature detectors (RTDs) are the most commonly used temperature detectors in the medium and low temperature range. RTD temperature measurement is based on the property that the resistance of a metallic conductor increases with increasing temperature. Its main characteristics are high measurement accuracy and stable performance.

[0003] To prevent corrosion damage to the resistor element during measurement, a protective mechanism is needed around its perimeter. For example, a protective device for a resistance temperature detector (RTD) is disclosed in CN217878070U. This device includes an RTD body; a connecting cable located at the bottom of the RTD body; a base plate located at the bottom of the RTD body; two side plates fixedly mounted on top of the base plate; an opening and closing mechanism located on top of the base plate; two protective covers symmetrically arranged on top of the opening and closing mechanism; and multiple shock-absorbing mechanisms respectively located on the inner walls of the two protective covers on both sides. The RTD protective device provided by this invention has the advantages of easy maintenance and replacement, good protective effect, and heat dissipation function.

[0004] The design does not protect the ends of the resistor, making them susceptible to corrosion. Furthermore, the protective cover traps the resistor in the middle, creating a distance between the cover and the resistor. This makes it difficult for the resistor to quickly detect temperature changes, leading to measurement errors. Summary of the Invention

[0005] The purpose of this invention is to provide a multi-layer protective thermal resistance sealing structure and its sealing method to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, one objective of this invention is to provide a multi-layer protective resistance temperature detector (RTD) sealing structure, including an outer tube and a main seal and a secondary seal installed inside the outer tube. A resistor is disposed inside the outer tube, the main seal is disposed inside the outer tube, and the secondary seal is disposed inside the main seal. Temperature measurement channels are formed between the main seal and the outer tube, and between the secondary seal and the main seal. The outer tube is located within the outer temperature measurement channel. Both the main seal and the secondary seal are provided with drainage elements. When leakage occurs in the outer temperature measurement channel, the drainage elements guide the liquid in that temperature measurement channel to the starting end of that channel, thereby using the liquid level difference to adjust the resistor to another temperature measurement channel.

[0007] As a further improvement to this technical solution, the top of the resistor is connected to a connecting wire that passes through the top of the outer sleeve. The main sealing element includes a middle sleeve, which is fixedly installed inside the connecting wire. An outer temperature measuring channel is formed between the outer wall of the middle sleeve and the inner wall of the outer sleeve. A main opening is provided on the side wall of the middle sleeve. A main baffle is fixedly installed inside the outer temperature measuring channel. One end of the main baffle is fixedly connected to the inner wall of the outer sleeve. An outer guide is provided on the outer wall of the middle sleeve. The outer guide is used to adjust the position of the resistor according to the liquid in the outer temperature measuring channel.

[0008] As a further improvement to this technical solution, the outer guide includes an outer circular tube, which is rotatably disposed on the outer wall of the middle sleeve. The outer wall of the outer circular tube is fitted with the other end of the main baffle. A main opening is provided on the side wall of the outer circular tube. Sealing plates are fixedly connected to both ends of the main opening. The resistor is located between the two sealing plates. A connecting plate is provided at the ends of the two sealing plates to fix them together. The side wall of the connecting plate is fitted with the inner wall of the outer sleeve. The bottom of the connecting plate is inclined downward toward the main opening.

[0009] As a further improvement to this technical solution, the secondary sealing element includes an inner sleeve disposed inside the middle sleeve and fixedly disposed at the bottom of the outer sleeve. A secondary temperature measuring channel is formed between the outer wall of the inner sleeve and the inner wall of the middle sleeve. A secondary opening is provided on the side wall of the inner sleeve away from the main opening. A secondary baffle is provided in the secondary temperature measuring channel. One end of the secondary baffle is fixedly disposed on the inner wall of the middle sleeve. An inner layer guide is provided on the outer wall of the secondary opening. The inner layer guide is used to adjust the position of the resistive element according to the liquid in the inner layer temperature measuring channel.

[0010] As a further improvement to this technical solution, the inner guide includes an inner circular tube, which is rotatably disposed on the outer ring of the secondary opening. The side wall of the inner circular tube is attached to one end of the secondary baffle. A secondary passage is opened on the side wall of the inner circular tube near the main opening. Guide plates are fixedly connected to both ends of the secondary passage. The end of the guide plate is attached to the inner wall of the middle sleeve. A side plate is fixedly connected to the end of the guide plate near the secondary baffle. The outer wall of the side plate is attached to the inner wall of the middle sleeve. A guide block is fixedly connected to the bottom end of the guide plate. The top of the guide block is inclined downward toward the secondary opening.

[0011] As a further improvement to this technical solution, the top end of the guide block and the bottom end of the connecting plate are on the same horizontal plane.

[0012] As a further improvement to this technical solution, the sealing structure further includes a drainage component, which includes a fixing ring disposed within the outer and inner temperature measuring channels. The top of the fixing ring has a liquid collection groove, and one end of the fixing ring has a drain outlet connected to the liquid collection groove.

[0013] The outer wall of the fixing ring located in the outer temperature measurement channel is fixedly connected to the inner wall of the outer sleeve, and the drain port is located on the side of the main baffle away from the main opening;

[0014] The outer wall of the fixing ring located in the inner temperature measurement channel is fixedly connected to the inner wall of the middle sleeve, and the drain port is located on the side of the secondary baffle away from the secondary opening.

[0015] As a further improvement to this technical solution, the outer ring of the outer sleeve is provided with multiple grooves, the inner wall of the grooves is provided with through grooves, the through grooves penetrate the side wall of the outer sleeve, a rotating ring is rotatably arranged in the grooves, an indicator point is fixedly arranged on the side wall of the rotating ring, a connecting rod is fixedly connected to the inner wall of one of the rotating rings, one end of one of the connecting rods passes through the through groove and is fixedly connected to the top of the inner tube, and one end of the other connecting rod passes through the through groove and is fixedly connected to the top of the connecting plate.

[0016] As a further improvement to this technical solution, two pull ropes are fixedly connected to the side wall of the connecting line, and both pull ropes pass through the side wall of the connecting line and are arranged symmetrically.

[0017] The second objective of this invention is to provide a sealing method for a multi-layer protective resistance temperature detector (RTD) sealing structure, comprising the following steps:

[0018] S1. The initial position of the resistor is between the two sealing plates. When the side wall of the outer tube is corroded or leakage occurs in other cases, the external liquid enters the inner wall of the outer tube and drips into the liquid collection tank at the top of the fixing ring, and then is discharged through the drain port at one end of the liquid collection tank.

[0019] S2. Since the drain outlet is located on the side of the main baffle away from the main opening, the liquid will accumulate between the main baffle and the sealing plate near the main baffle. Since there is no liquid at the other sealing plate, when the liquid accumulates, the liquid will pass through the sealing plate according to the liquid level difference, causing the sealing plate to drive the outer tube to rotate. When the main port is connected to the main opening, the resistor will slide into the inner sleeve through the inclined surface at the bottom of the connecting plate by gravity and enter between the two guide plates.

[0020] S3. When leakage also occurs on the side wall of the middle sleeve, the liquid enters the inner wall of the middle sleeve and is collected by the liquid collection tank at the top of the fixing ring. Then it is discharged through the drain port to the side of the secondary baffle away from the secondary opening. At this time, the liquid is located between the inner tube and the side plate. When the liquid accumulates to a large volume, the liquid pushes the guide plate under the action of the liquid level difference, causing the inner tube to rotate. When the secondary port is connected to the secondary opening, the resistor uses gravity to slide into the inner sleeve through the inclined surface at the bottom of the guide block.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] 1. In this multi-layer protective RTD sealing structure and its sealing method, the accuracy of measurement is ensured by placing the resistor in the outermost layer of the multi-layer sealing structure. When leakage occurs in the outermost layer, the resistor is guided to the next layer by the liquid level difference. In this way, not only is the impact of the multi-layer structure on the accuracy of resistor measurement reduced, but also the protective sealing of the resistor end is achieved.

[0023] 2. In this multi-layer protective thermal resistance sealing structure and its sealing method, the position of the resistor is adjusted by using a multi-layer sealing structure. When rapid cooling or heating occurs, the resistor can be adjusted to the innermost layer to slow down the time it takes for the temperature to be transferred to the resistor, allowing the resistor sufficient reaction time, thereby improving the life of the resistor. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 This is a cross-sectional schematic diagram of the outer sleeve structure of the present invention;

[0026] Figure 3 This is a schematic diagram of the structure of the main sealing element of the present invention;

[0027] Figure 4 This is a schematic diagram of the secondary seal of the present invention;

[0028] Figure 5 This is a schematic cross-sectional view of the internal structure of the outer sleeve of the present invention;

[0029] Figure 6 This is a cross-sectional schematic diagram of the outer sleeve structure of the present invention;

[0030] Figure 7 This is a schematic diagram of the drainage component of the present invention;

[0031] Figure 8 This is a schematic diagram of the structure of the fixing ring of the present invention;

[0032] Figure 9 This is a schematic diagram of the groove structure of the present invention;

[0033] Figure 10 This is a schematic diagram of the rotating ring structure of the present invention.

[0034] The meanings of the labels in the diagram are as follows:

[0035] 100. Outer tube;

[0036] 110. Connecting wire; 111. Resistor;

[0037] 120. Groove; 121. Through groove; 122. Rotary ring; 123. Connecting rod; 124. Indicator point; 125. Pull rope;

[0038] 200. Main seal;

[0039] 210. Middle sleeve; 211. Main opening; 212. Main baffle; 213. Outer round tube; 214. Main port; 215. Sealing plate; 216. Connecting plate;

[0040] 300. Secondary sealing components;

[0041] 310. Inner sleeve; 311. Secondary opening; 312. Secondary baffle; 313. Inner round tube; 314. Secondary through-hole; 315. Guide plate; 316. Side plate; 317. Guide block;

[0042] 400. Drainage device; 410. Fixing ring; 411. Drain outlet. Detailed Implementation

[0043] 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 some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0044] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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. Therefore, they should not be construed as limitations on this invention.

[0045] Furthermore, in the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0046] Please see Figures 1-4 As shown, one of the objectives of this embodiment is to provide a multi-layer protective thermal resistance sealing structure, including an outer tube 100 and a main seal 200 and a secondary seal 300 installed inside the outer tube 100. A resistor 111 is disposed inside the outer tube 100. The main seal 200 is disposed inside the outer tube 100, and the secondary seal 300 is disposed inside the main seal 200. Temperature measurement channels are formed between the main seal 200 and the outer tube 100, and between the secondary seal 300 and the main seal 200. The outer tube 100 is located in the outer layer of the temperature measurement channels. Both the main seal 200 and the secondary seal 300 are provided with drainage components 400. When the temperature measurement channel in the outer layer leaks, the drainage component 400 guides the liquid in the temperature measurement channel to the starting end of the temperature measurement channel, so as to use the liquid level difference to adjust the resistor 111 into another temperature measurement channel.

[0047] Next, through Figures 1-8 The first embodiment of the present invention is shown;

[0048] In order to achieve multi-layer protection for resistor 111 without affecting its temperature measurement accuracy, the main seal 200 is first disclosed. Figure 2 and Figure 3 In the middle, the top of the resistor 111 is connected to the connecting line 110, which passes through the top of the outer sleeve 100, thereby connecting with external temperature measuring instruments and equipment to achieve the purpose of temperature measurement. The main sealing component 200 includes a middle sleeve 210, which is fixedly installed inside the connecting line 110. The outer wall of the middle sleeve 210 and the inner wall of the outer sleeve 100 form an outer temperature measuring channel. The side wall of the middle sleeve 210 has a main opening 211. A main baffle 212 is fixedly installed in the outer temperature measuring channel. One end of the main baffle 212 is fixedly connected to the inner wall of the outer sleeve 100. The outer wall of the middle sleeve 210 is provided with an outer guide, which is used to adjust the position of the resistor 111 according to the liquid in the outer temperature measuring channel.

[0049] The outer guide includes an outer tube 213, which is rotatably mounted on the outer wall of the middle sleeve 210. The outer wall of the outer tube 213 is in contact with the other end of the main baffle 212 to prevent liquid on one side of the main baffle 212 from flowing to the other side of the main baffle 212 through the outer wall of the outer tube 213. The side wall of the outer tube 213 is provided with a main opening 214. Both ends of the main opening 214 are fixedly connected with sealing plates 215. The resistor 111 is located between the two sealing plates 215. This position is close to the outer wall of the outer sleeve 100, so that the temperature conduction at this position is faster and has less impact on the temperature measurement result of the resistor 111. The ends of the two sealing plates 215 are provided with connecting plates 216 that fix the two together. The side wall of the connecting plate 216 is in contact with the inner wall of the outer sleeve 100, and the bottom of the connecting plate 216 is inclined downward toward the main opening 211.

[0050] Then, the secondary seal 300 was disclosed. Figures 3-5 In the middle, the secondary sealing element 300 includes an inner sleeve 310, which is disposed inside the middle sleeve 210 and fixedly disposed at the bottom of the outer sleeve 100. A secondary temperature measuring channel is formed between the outer wall of the inner sleeve 310 and the inner wall of the middle sleeve 210. A secondary opening 311 is provided on the side wall of the inner sleeve 310 away from the main opening 211. A secondary baffle 312 is provided in the secondary temperature measuring channel. One end of the secondary baffle 312 is fixedly disposed on the inner wall of the middle sleeve 210. An inner guide is provided on the outer wall of the secondary opening 311. The inner guide is used to adjust the position of the resistor 111 according to the liquid in the inner temperature measuring channel.

[0051] The inner guide includes an inner tube 313, which is rotatably disposed on the outer ring of the secondary opening 311. The side wall of the inner tube 313 is attached to one end of the secondary baffle 312. A secondary passage 314 is provided on the side wall of the inner tube 313 near the main opening 211. Both ends of the secondary passage 314 are fixedly connected to guide plates 315. The end of the guide plate 315 is attached to the inner wall of the middle sleeve 210. The end of the guide plate 315 near the secondary baffle 312 is fixedly connected to a side plate 316. The outer wall of the side plate 316 is attached to the inner wall of the middle sleeve 210. A guide block 317 is fixedly connected to the bottom end of the guide plate 315. The top of the guide block 317 is inclined downward toward the secondary opening 311.

[0052] Furthermore, in order to allow the resistor 111 at the bottom of the connecting plate 216 to slide smoothly to the top of the guide block 317, the top of the guide block 317 and the bottom of the connecting plate 216 are set in the same horizontal plane in this embodiment, so that a height difference is formed between the connecting plate 216 and the guide block 317, thereby ensuring the sliding of the resistor 111.

[0053] Figure 7 and Figure 8The sealing structure also includes a drainage component 400, which includes a fixing ring 410 disposed within the outer and inner temperature measuring channels. The top of the fixing ring 410 has a liquid collection groove, and one end of the fixing ring 410 has a drain port 411 communicating with the liquid collection groove.

[0054] The outer wall of the fixing ring 410 located in the outer temperature measurement channel is fixedly connected to the inner wall of the outer sleeve 100, and the drain port 411 is located on the side of the main baffle 212 away from the main opening 211.

[0055] The outer wall of the fixing ring 410 located in the inner temperature measurement channel is fixedly connected to the inner wall of the middle sleeve 210, and the drain port 411 is located on the side of the secondary baffle 312 away from the secondary opening 311. At the same time, due to the uncertainty of the leakage location of the outer sleeve 100 and the middle sleeve 210, multiple fixing rings 410 are provided in both the outer and inner temperature measurement channels. This allows for the collection of leakage from different parts and the diversion of water to the starting end of the corresponding channel.

[0056] Working principle:

[0057] The resistor 111 is initially positioned between the two sealing plates 215. When the sidewall of the outer sleeve 100 is corroded or leaks due to other reasons, external liquid enters the inner wall of the outer sleeve 100 and drips into the collection tank at the top of the fixing ring 410, and then is discharged through the drain port 411 at one end of the collection tank. Since the drain port 411 is located on the side of the main baffle 212 away from the main opening 211, liquid will accumulate between the main baffle 212 and the sealing plate 215 near the main baffle 212. Since there is no liquid at the other sealing plate 215, when a large amount of liquid accumulates, the liquid will pass through the sealing plate 215 according to the liquid level difference, causing the sealing plate 215 to drive the outer tube 213 to rotate. When the main port 214 is connected to the main opening 211, the resistor 111 slides into the inner sleeve 210 through the inclined surface at the bottom of the connecting plate 216 by gravity and enters between the two guide plates 315.

[0058] When leakage occurs on the side wall of the middle sleeve 210 after a period of time, the liquid enters the inner wall of the middle sleeve 210 and is collected by the liquid collection tank at the top of the fixing ring 410. Then it is discharged through the drain port 411 to the side of the secondary baffle 312 away from the secondary opening 311. At this time, the liquid is located between the inner tube 313 and the side plate 316. When the liquid accumulates to a large volume, the liquid pushes the guide plate 315 under the action of the liquid level difference, causing the inner tube 313 to rotate. When the secondary port 314 is connected to the secondary opening 311, the resistor 111 slides into the inner sleeve 310 through the inclined surface at the bottom of the guide block 317 by gravity, realizing multi-layer protection and sealing of the resistor 111.

[0059] In other words, by placing the resistor 111 on the outermost layer of the multi-layer sealing structure, the accuracy of the measurement is ensured. When leakage occurs in the outermost layer, the resistor 111 is guided to the next layer by the liquid level difference. In this way, not only is the impact of the multi-layer structure on the accuracy of the resistor 111 measurement reduced, but also the protective sealing of the end of the resistor 111 is achieved.

[0060] The second objective of this embodiment is to provide a sealing method for a multi-layer protective resistance temperature detector (RTD) sealing structure, comprising the following steps:

[0061] S1. The initial position of the resistor 111 is between the two sealing plates 215. When the side wall of the outer tube 100 is corroded or leakage occurs in other cases, external liquid enters the inner wall of the outer tube 100 and drips into the liquid collection tank at the top of the fixing ring 410, and then is discharged through the drain port 411 at one end of the liquid collection tank.

[0062] S2. Since the drain port 411 is located on the side of the main baffle 212 away from the main opening 211, the liquid will accumulate between the main baffle 212 and the sealing plate 215 near the main baffle 212. Since there is no liquid at the other sealing plate 215, when the liquid accumulates, the liquid will pass through the sealing plate 215 according to the liquid level difference, causing the sealing plate 215 to drive the outer tube 213 to rotate. When the main port 214 is connected to the main opening 211, the resistor 111 uses gravity to slide into the interior of the central sleeve 210 through the inclined surface at the bottom of the connecting plate 216 and enters between the two guide plates 315.

[0063] S3. When leakage occurs on the side wall of the middle sleeve 210, the liquid enters the inner wall of the middle sleeve 210 and is collected by the liquid collection tank at the top of the fixing ring 410. Then it is discharged through the drain port 411 to the side of the secondary baffle 312 away from the secondary opening 311. At this time, the liquid is located between the inner tube 313 and the side plate 316. When the liquid accumulates, the liquid pushes the guide plate 315 under the action of the liquid level difference, causing the inner tube 313 to rotate. When the secondary port 314 is connected to the secondary opening 311, the resistor 111 slides into the inner sleeve 310 by gravity through the inclined surface at the bottom of the guide block 317.

[0064] In the second embodiment, considering that in some environments, such as when switching from low-temperature detection to high-temperature detection, the temperature difference between high and low temperatures can easily affect the resistor 111, leading to measurement deviations in the resistor 111. Therefore, please refer to... Figure 9 and Figure 10 As shown:

[0065] The outer ring of the outer tube 100 has multiple grooves 120. The inner wall of the groove 120 has a through groove 121 that penetrates the side wall of the outer tube 100. A rotating ring 122 is rotatably arranged inside the groove 120. An indicator point 124 is fixedly arranged on the side wall of the rotating ring 122. A connecting rod 123 is fixedly connected to the inner wall of one of the rotating rings 122. One end of one connecting rod 123 passes through the through groove 121 and is fixedly connected to the top of the inner tube 313. One end of the other connecting rod 123 passes through the through groove 121 and is fixedly connected to the top of the connecting plate 216.

[0066] According to the above description, another effect is to check whether the outer sleeve 100 is leaking. That is, when water leaks inside the connecting line 110, the liquid level difference will cause the connecting plate 216 and the inner round tube 313 to rotate. During the rotation, the connecting plate 216 and the inner round tube 313 will drive the rotating ring 122 to rotate through the connecting rod 123. At this time, people can observe the indicator point 124 on the outer wall of the rotating ring 122 to know whether there is a leak.

[0067] Two pull ropes 125 are fixedly connected to the side wall of the connecting wire 110. Both pull ropes 125 pass through the side wall of the connecting wire 110 and are symmetrically arranged. The connecting wire 110 is preferably made of a rigid material. Alternatively, a rigid metal rod can be attached to the side of the connecting wire 110 so that the connecting wire 110 can move the resistor 111 when the pull rope 125 pulls the connecting wire 110.

[0068] When it is necessary to switch from low-temperature detection to high-temperature detection, the position of resistor 111 can be adjusted to reduce the rate of heat conduction, as follows:

[0069] First, rotate one of the rotating rings 122. The rotating ring 122, via the connecting rod 123, drives the connecting plate 216 to rotate to the main opening 211, causing the resistor 111 to slide between the two guide plates 315. Then, rotate the other rotating ring 122. This rotating ring 122, via the connecting rod 123, drives the inner tube 313 to rotate to the secondary opening 311, causing the resistor 111 to slide into the inner sleeve 310. At this point, the resistor 111 is located in the middle of the outer sleeve 100, and the heat conduction speed is reduced. When it is necessary to reset the resistor 111 to the outer layer, first pull the connecting wire 110 via one of the pull ropes 125, causing the connecting wire 110 to pull the resistor 111 away from the inner sleeve 310 and into the space between the two guide plates 315. Then, reverse one of the rotating rings 122 to position the resistor 111 at the main opening 211. Finally, pull the other pull rope 125 to position the resistor 111 between the two sealing plates 215, thus resetting the resistor 111.

[0070] Therefore, it can be seen that by using a multi-layer sealing structure to adjust the position of the resistor 111, when there is a rapid cooling or heating phenomenon, the resistor 111 can be adjusted to the innermost layer to slow down the time it takes for the temperature to be transferred to the resistor 111, so that the resistor 111 has sufficient response time, thereby improving the life of the resistor 111.

[0071] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-layer protective thermal resistance sealing structure, comprising an outer sleeve (100) and a main sealing element (200) and a secondary sealing element (300) installed within the outer sleeve (100), wherein a resistor (111) is disposed within the outer sleeve (100), characterized in that: The main seal (200) is disposed inside the outer sleeve (100), and the secondary seal (300) is disposed inside the main seal (200). Temperature measuring channels are formed between the main seal (200) and the outer sleeve (100), and between the secondary seal (300) and the main seal (200). The resistor (111) is located in the outer temperature measuring channel. Both the main seal (200) and the secondary seal (300) are provided with a drain (400). When the temperature measuring channel in the outer layer leaks, the drain (400) guides the liquid in the temperature measuring channel to the beginning of the temperature measuring channel, so as to use the liquid level difference to adjust the resistor (111) to another temperature measuring channel. The main sealing element (200) includes a middle sleeve (210), which is fixedly disposed inside the outer sleeve (100). An outer temperature measuring channel is formed between the outer wall of the middle sleeve (210) and the inner wall of the outer sleeve (100). A main opening (211) is provided on the side wall of the middle sleeve (210). A main baffle (212) is fixedly disposed inside the outer temperature measuring channel. One end of the main baffle (212) is fixedly connected to the inner wall of the outer sleeve (100). An outer guide is provided on the outer wall of the middle sleeve (210). The outer guide is used to adjust the position of the resistor (111) according to the liquid in the outer temperature measuring channel. The outer guide includes an outer tube (213), which is rotatably disposed on the outer wall of the middle sleeve (210). The outer wall of the outer tube (213) is attached to the other end of the main baffle (212). The side wall of the outer tube (213) is provided with a main opening (214). Both ends of the main opening (214) are fixedly connected with sealing plates (215). The resistor (111) is located between the two sealing plates (215). The ends of the two sealing plates (215) are provided with connecting plates (216) that fix the two together. The side wall of the connecting plate (216) is attached to the inner wall of the outer sleeve (100). The bottom of the connecting plate (216) is inclined downward toward the main opening (211). The secondary sealing element (300) includes an inner sleeve (310), which is disposed inside the middle sleeve (210). The inner sleeve (310) is fixedly disposed at the bottom of the outer sleeve (100). A secondary temperature measuring channel is formed between the outer wall of the inner sleeve (310) and the inner wall of the middle sleeve (210). A secondary opening (311) is provided on the side wall of the inner sleeve (310) away from the main opening (211). A secondary baffle (312) is provided in the secondary temperature measuring channel. One end of the secondary baffle (312) is fixedly disposed on the inner wall of the middle sleeve (210). An inner guide is provided on the outer wall of the secondary opening (311). The inner guide is used to adjust the position of the resistor (111) according to the liquid in the inner temperature measuring channel. The inner guide includes an inner tube (313), which is rotatably disposed on the outer ring of the secondary opening (311). The side wall of the inner tube (313) is attached to one end of the secondary baffle (312). A secondary passage (314) is opened on the side wall of the inner tube (313) near the main opening (211). Both ends of the secondary passage (314) are fixedly connected to guide plates (315). The end of the guide plate (315) is attached to the inner wall of the middle sleeve (210). The end of the guide plate (315) near the secondary baffle (312) is fixedly connected to a side plate (316). The outer wall of the side plate (316) is attached to the inner wall of the middle sleeve (210). A guide block (317) is fixedly connected to the bottom end of the guide plate (315). The top of the guide block (317) is inclined downward toward the secondary opening (311). The sealing structure further includes a drainage component (400), which includes a fixing ring (410) disposed in the outer temperature measuring channel and the inner temperature measuring channel. A liquid collection groove is provided at the top of the fixing ring (410), and a drain port (411) is provided at one end of the fixing ring (410). The drain port (411) communicates with the liquid collection groove. The outer wall of the fixing ring (410) located in the outer temperature measuring channel is fixedly connected to the inner wall of the outer sleeve (100), and the drain port (411) is located on the side of the main baffle (212) away from the main opening (211); The outer wall of the fixing ring (410) located in the inner temperature measurement channel is fixedly connected to the inner wall of the middle sleeve (210), and the drain port (411) is located on the side of the secondary baffle (312) away from the secondary opening (311).

2. The multi-layer protective resistance temperature detector sealing structure according to claim 1, characterized in that: The top of the resistor (111) is connected to a connecting line (110), which passes through the top of the outer sleeve (100).

3. The multi-layer protective thermal resistance sealing structure according to claim 1, characterized in that: The top of the guide block (317) and the bottom of the connecting plate (216) are on the same horizontal plane.

4. The multi-layer protective thermal resistance sealing structure according to claim 2, characterized in that: The outer ring of the outer sleeve (100) is provided with a plurality of grooves (120), and the inner wall of the grooves (120) is provided with a through groove (121). The through groove (121) penetrates the side wall of the outer sleeve (100). A rotating ring (122) is rotatably provided in the groove (120). An indicator point (124) is fixedly provided on the side wall of the rotating ring (122). A connecting rod (123) is fixedly connected to the inner wall of one of the rotating rings (122). One end of one of the connecting rods (123) passes through the through groove (121) and is fixedly connected to the top of the inner round tube (313). One end of the other connecting rod (123) passes through the through groove (121) and is fixedly connected to the top of the connecting plate (216).

5. The multi-layer protective thermal resistance sealing structure according to claim 4, characterized in that: Two pull ropes (125) are fixedly connected to the side wall of the connecting line (110). Both pull ropes (125) pass through the side wall of the connecting line (110) and are arranged symmetrically.

6. A sealing method for a multi-layer protective resistance temperature detector (RTD) sealing structure as described in any one of claims 1-5, characterized in that: The methods and steps include the following: S1. The resistor (111) is initially positioned between two sealing plates (215). When the side wall of the outer tube (100) is corroded or leakage occurs in other situations, external liquid enters the inner wall of the outer tube (100) and drips into the liquid collection tank at the top of the fixing ring (410), and then is discharged through the drain port (411) at one end of the liquid collection tank. S2. Since the drain port (411) is located on the side of the main baffle (212) away from the main opening (211), the liquid will accumulate between the main baffle (212) and the sealing plate (215) near the main baffle (212). Since there is no liquid at the other sealing plate (215), when the liquid accumulates, the liquid will pass through the sealing plate (215) according to the liquid level difference, causing the sealing plate (215) to drive the outer tube (213) to rotate. When the main port (214) is connected to the main opening (211), the resistor (111) uses gravity to slide into the interior of the central sleeve (210) through the inclined surface at the bottom of the connecting plate (216) and enters between the two guide plates (315). S3. When leakage occurs on the side wall of the middle sleeve (210), the liquid enters the inner wall of the middle sleeve (210) and is collected by the liquid collection tank at the top of the fixing ring (410). Then, it is discharged through the drain port (411) to the side of the secondary baffle (312) away from the secondary opening (311). At this time, the liquid is located between the inner tube (313) and the side plate (316). When the liquid accumulates, the liquid pushes the guide plate (315) under the action of the liquid level difference, causing the inner tube (313) to rotate. When the secondary port (314) is connected to the secondary opening (311), the resistor (111) slides into the inner sleeve (310) through the inclined surface at the bottom of the guide block (317) by gravity.

Images