Temperature element lead oil-proof structure

Abstract

The utility model discloses a temperature element lead wire prevents oil structure of seepage, belongs to temperature measurement equipment field, including temperature element, is equipped with the lead-out line protection sleeve pipe on the temperature element, and the lead-out line protection sleeve pipe is led out the connection cable, the connection cable outer surface has first sealing layer and first sleeve pipe in proper order from inside to outside and is covered, first sealing layer is the epoxy resin layer, and includes integrated internal sealing part and side sealing part, internal sealing part fills between the first sleeve pipe inner wall and the connection cable circumference, and side sealing part fills between the butt joint end of lead-out line protection sleeve pipe and first sleeve pipe. This temperature element lead wire prevents oil structure of seepage, and internal sealing part is filled between the first sleeve pipe inner wall and the connection cable circumference closely, effectively prevents oil quality from the gap of first sleeve pipe and connection cable and seeps, and side sealing part fills between the butt joint end of lead-out line protection sleeve pipe and first sleeve pipe, and blocks the potential leakage passage at lead-out line protection sleeve pipe.

Description

Technical Field

[0001] This utility model relates to the field of temperature measurement equipment technology, specifically to an oil-proof structure for temperature element leads. Background Technology

[0002] In the operation of thermal power plants, temperature sensors are crucial monitoring components. As a key source of monitoring data for important systems, the accuracy and stability of their data directly affect the safe and efficient operation of the entire power generation system. In practical applications, some temperature sensors need to be installed inside the oil system, in direct contact with the oil. However, the operating conditions of thermal power plants are complex, with equipment operating in high-temperature environments for extended periods and experiencing continuous vibrations. Under these conditions, oil can gradually leak along the gaps between the protective sleeve of the temperature sensor lead wire and the temperature connection cable.

[0003] This oil leakage phenomenon brings many problems. On the one hand, frequent oil leakage significantly increases the workload of maintenance personnel, who need to spend a lot of time and energy to find and repair the leakage points, seriously affecting maintenance efficiency. On the other hand, oil leakage poses a threat to the safe operation of the entire turbine system, which may lead to poor system lubrication, accelerated component wear, and even more serious equipment failures, thereby affecting power generation efficiency and power supply stability, causing huge economic losses.

[0004] Existing temperature element lead wire structures have insufficient sealing performance, making it difficult to effectively resist damage to the seal caused by complex operating conditions such as high temperatures and vibrations. This fails to meet the actual requirements for leak-proof temperature elements in the oil systems of thermal power plants. Therefore, there is an urgent need to design a novel leak-proof structure for temperature element leads to solve the aforementioned technical problems. Summary of the Invention

[0005] The purpose of this invention is to address the problems existing in the prior art by providing an oil-proof structure for temperature element leads.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is: a temperature element lead-in oil-proof structure, including a temperature element, on which a lead-out protective sleeve is provided, and a connecting cable is led out through the lead-out protective sleeve. The outer surface of the connecting cable is sequentially covered with a first sealing layer and a first sleeve from the inside to the outside, which together constitute a primary oil-proof structure.

[0007] The first sealing layer is an epoxy resin layer, comprising an integrally molded internal sealing part and a side sealing part. The internal sealing part fills the space between the inner wall of the first sleeve and the outer periphery of the connecting cable, while the side sealing part fills the space between the lead-out wire protective sleeve and the mating end of the first sleeve, forming a continuous sealing structure. The internal sealing part achieves a seal between the first sleeve and the connecting cable, while the side sealing part seals the interface between the lead-out wire protective sleeve and the sleeve; the two work together to improve the oil leakage prevention effect.

[0008] The first sleeve is made of stainless steel or rubber, both of which are corrosion-resistant and adaptable to the working environment of oil systems. They also provide support for the first sealing layer, enhancing the overall structural stability. The length of the first sleeve is between 50mm and 200mm, a range that ensures protection for critical parts of the connecting cables while also considering ease of installation and cost control. The inner wall of the first sleeve has spiral-shaped guide grooves to enhance the bonding strength between the internal first sealing layer and the first sleeve.

[0009] The connecting cable includes an internal conductor bundle and an outer sheath surrounding the conductor bundle. At least one circumferential cut is located on the outer periphery of the connecting cable, where the outer sheath is missing, exposing the conductor bundle. A first sleeve is fitted over the circumferential cut, and its internal sealing portion is directly fixed to the outer periphery of the conductor bundle. This eliminates any gaps that may exist between the outer sheath and the conductor bundle, further enhancing sealing performance and preventing oil penetration.

[0010] The radial thickness of the internal sealing portion is 0.5-1 mm, and the radial thickness of the side sealing portion is 0.8-1.2 mm. This dimensional design ensures that the first sealing layer has sufficient sealing strength without affecting structural installation and overall performance, achieving a balance between sealing effect and structural stability.

[0011] The first sleeve is further provided with a second sealing layer and a second sleeve on the outside; the second sealing layer is an epoxy resin layer, which fills the space between the outer wall of the first sleeve and the inner wall of the second sleeve; the second sleeve is a stainless steel tube or a rubber tube; and the outer wall of the first sleeve has microgrooves or a roughened structure. The second sealing layer and the first sealing layer form a double seal, and the second sleeve provides support for the second sealing layer. The microgrooves or roughened structure on the outer wall of the inner sleeve enhances the bonding force with the second sealing layer. The multi-layer structure further improves the corrosion resistance and oil leakage prevention capabilities of the structure.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. The oil-proof structure of this temperature element lead wire features an internal sealing part that tightly fills the space between the inner wall of the first sleeve and the outer periphery of the connecting cable, effectively preventing oil from seeping through the gap between the first sleeve and the connecting cable. The side sealing part fills the space between the lead wire protective sleeve and the first sleeve, sealing any potential leakage channels at the lead wire protective sleeve. The combined effect of these two components significantly improves the oil-proof performance, effectively reducing the possibility of oil leakage along the temperature element lead wire and ensuring the normal operation of the equipment.

[0014] 2. The temperature element lead wire has an oil-proof structure. The first sleeve is made of stainless steel or rubber tubing. Both materials have excellent corrosion resistance and can be used stably for a long time in the complex working environment of oil systems. Stainless steel tubing has high strength and excellent corrosion resistance, can withstand certain pressure and wear, and is not easily corroded by oil. Rubber tubing has good flexibility and sealing performance, can adapt to vibration and deformation during equipment operation, and has a certain degree of tolerance to oil.

[0015] 3. The oil-proof structure of this temperature element lead has a circumferential cut on the connecting cable to expose the lead bundle. The inner sealing part of the first sealing layer is directly fixed to the outer periphery of the lead bundle, eliminating any gaps that may exist between the outer sheath and the lead bundle. This prevents oil from seeping through the gaps, further enhancing the sealing performance and ensuring that the temperature element lead still has a reliable sealing effect under complex working conditions such as high temperature and vibration.

[0016] 4. The oil-proof structure of this temperature element lead wire is formed by setting a second sealing layer and a second sleeve on the outer periphery of the first sleeve. The first sealing layer and the second sealing layer are made of epoxy resin, forming a double sealing system. The second sealing layer further seals the outside of the first sleeve. The multi-layer sealing cooperation can effectively prevent oil from leaking along the temperature element lead wire, significantly reduce the risk of oil leakage, and improve the oil-proof effect. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0018] Figure 2 This is a schematic diagram of the external structure of the first sealing layer and the first sleeve of this utility model.

[0019] Figure 3 This is a cross-sectional structural diagram of the present invention.

[0020] In the diagram: 1. Temperature element; 11. Lead wire protective sleeve; 2. Connecting cable; 21. Wire harness; 22. Outer sheath; 3. First sealing layer; 31. Internal sealing part; 32. Side sealing part; 4. First sleeve; 5. Second sealing layer; 6. Second sleeve. Detailed Implementation

[0021] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0022] Please refer to Figures 1 to 3 This embodiment provides an oil-proof structure for the lead wire of a temperature element 1, including a temperature element 1. The temperature element 1 is provided with a lead wire protective sleeve 11, through which a connecting cable 2 is led out. The outer surface of the connecting cable 2 is sequentially covered with a first sealing layer 3 and a first sleeve 4 from the inside out, which together constitute a primary oil-proof structure.

[0023] The first sealing layer 3 is an epoxy resin layer, comprising an integrally formed internal sealing part 31 and a side sealing part 32. The internal sealing part 31 fills the space between the inner wall of the first sleeve 4 and the outer periphery of the connecting cable 2, while the side sealing part 32 fills the space between the lead wire protective sleeve 11 and the mating end of the first sleeve 4, forming a continuous sealing structure. The internal sealing part 31 achieves a seal between the first sleeve 4 and the connecting cable 2, while the side sealing part 32 seals the interface between the lead wire protective sleeve 11 and the sleeve. The two work together to improve the oil leakage prevention effect.

[0024] The first sleeve 4 is made of stainless steel or rubber, both of which are corrosion-resistant and adaptable to the working environment of oil systems. It also provides support for the first sealing layer 3, enhancing the overall structural stability. The length of the first sleeve 4 is between 50mm and 200mm, a range that ensures protection for critical parts of the connecting cable 2 while also considering ease of installation and cost control. The inner wall of the first sleeve 4 has spiral-shaped guide grooves, which enhance the bonding strength between the internal first sealing layer 3 and the first sleeve 4.

[0025] The connecting cable 2 includes an internal conductor bundle 21 and an outer sheath 22 surrounding the conductor bundle 21. At least one circumferential cut is located on the outer periphery of the connecting cable 2, where the outer sheath 22 is missing, exposing the conductor bundle 21. A first sleeve 4 is fitted over the circumferential cut, and its internal sealing part 31 is directly fixed to the outer periphery of the conductor bundle 21. This eliminates any gaps that may exist between the outer sheath 22 and the conductor bundle 21, further enhancing the sealing performance and preventing oil penetration.

[0026] The radial thickness of the internal sealing part 31 is 0.5-1 mm, and the radial thickness of the side sealing part 32 is 0.8-1.2 mm. This dimensional design ensures that the first sealing layer 3 has sufficient sealing strength without affecting structural installation and overall performance, achieving a balance between sealing effect and structural stability.

[0027] Please refer to Figure 1 and Figure 3 The first sleeve 4 is further provided with a second sealing layer 5 and a second sleeve 6. The second sealing layer 5 is an epoxy resin layer, which fills the space between the outer wall of the first sleeve 4 and the inner wall of the second sleeve 6. The second sleeve 6 is a stainless steel tube or a rubber tube. The outer wall of the first sleeve 4 is provided with microgrooves or a roughened structure. The second sealing layer 5 and the first sealing layer 3 form a double seal. The second sleeve 6 provides support for the second sealing layer 5. The microgrooves or roughened structure on the outer wall of the inner sleeve enhances the bonding force with the second sealing layer 5. The multi-layer structure further improves the corrosion resistance and oil leakage prevention of the structure.

[0028] In some embodiments, a rubber pipe can be selected as the first sleeve 4 and a stainless steel pipe as the second sleeve 6, or a stainless steel pipe can be selected as the first sleeve 4 and a rubber pipe as the second sleeve 6, so that the seepage prevention structure can simultaneously possess the buffering performance of the rubber pipe and the wear resistance and impact resistance of the stainless steel pipe; in other embodiments, both stainless steel pipe and rubber pipe can be used for the first sleeve 4 and the second sleeve 6, which can also meet the seepage prevention requirements.

[0029] Implementation method: Select at least one suitable location on the outer periphery of the connecting cable 2 for circumferential cutting, and use a tool to remove the outer sheath 22 of the circumferential cutting part to expose the internal wire bundle 21;

[0030] A first sleeve 4, with a length of 50mm to 200mm, is fitted onto the outside of the circumferential section of the connecting cable 2, so that the inner wall of the first sleeve 4 corresponds to the outer periphery of the wire bundle 21. Using a casting process, epoxy resin is filled between the inner wall of the first sleeve 4 and the outer periphery of the connecting cable 2, and between the lead wire protective sleeve 11 and the mating end of the first sleeve 4. During the epoxy resin curing process, an integrally formed first sealing layer 3 is formed, wherein the inner sealing part 31 is filled between the inner wall of the first sleeve 4 and the wire bundle 21, and the side sealing part 32 is filled at the mating end of the lead wire protective sleeve 11 and the first sleeve 4, ensuring that the thickness of the sealing layer meets the design requirements. The radial thickness of the inner sealing part 31 is 0.5-1mm, the radial thickness of the side sealing part 32 is 0.8-1.2mm, and the axial length of the side sealing part extends 2-3mm beyond each end of the first sleeve 4.

[0031] A second sleeve 6 is installed outside the first sleeve 4, and epoxy resin is filled between the outer wall of the first sleeve 4 and the inner wall of the second sleeve 6 to form a second sealing layer 5. Since the outer wall of the first sleeve 4 has pre-set microgrooves or a roughened structure, the contact area between the two is increased and the bonding force is improved when the epoxy resin is filled. During the filling process, the epoxy resin must be evenly distributed. After curing, the second sealing layer 5 and the first sealing layer 3 together form a double sealing structure, further improving the oil-proof performance.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A temperature element lead anti-oil leakage structure, characterized in that, It includes a temperature element (1), which is provided with a lead wire protective sleeve (11), and a connecting cable (2) is led out through the lead wire protective sleeve (11); the outer surface of the connecting cable (2) is covered with a first sealing layer (3) and a first sleeve (4) from the inside to the outside. The first sealing layer (3) is an epoxy resin layer, including an integrally formed internal sealing part (31) and a side sealing part (32); the internal sealing part (31) is filled between the inner wall of the first sleeve (4) and the outer periphery of the connecting cable (2), and the side sealing part (32) is filled between the lead wire protective sleeve (11) and the mating end of the first sleeve (4) to form a continuous sealing structure.

2. The oil-proof structure for the temperature element lead according to claim 1, characterized in that, The first sleeve (4) is a stainless steel pipe or a rubber pipe.

3. The oil-proof structure for the temperature element lead according to claim 1, characterized in that, The connecting cable (2) includes an inner conductor bundle (21) and an outer sheath (22) disposed on the outer periphery of the conductor bundle (21); the outer periphery of the connecting cable (2) is provided with at least one circumferential cut, the outer sheath (22) of the circumferential cut is missing, so that the conductor bundle (21) is exposed; the first sleeve (4) is sleeved on the outside of the circumferential cut, and the inner sealing part (31) is directly fixed to the outer periphery of the conductor bundle (21).

4. The oil-proof structure for the temperature element lead according to claim 1, characterized in that, The length of the first sleeve (4) is 50mm to 200mm.

5. The oil-proof structure for the temperature element lead according to claim 1, characterized in that, The inner wall of the first sleeve (4) is provided with a spiral guide groove.

6. The oil-proof structure for the temperature element lead according to claim 1, characterized in that, The radial thickness of the internal sealing part (31) is 0.5-1mm.

7. The oil-proof structure for the temperature element lead according to claim 1, characterized in that, The radial thickness of the side sealing part (32) is 0.8-1.2 mm.

8. The oil-proof structure for the temperature element lead according to claim 1, characterized in that, The first sleeve (4) is further provided with a second sealing layer (5) and a second sleeve (6); the second sealing layer (5) is an epoxy resin layer and is filled between the outer wall of the first sleeve (4) and the inner wall of the second sleeve (6); the second sleeve (6) is a stainless steel tube or a rubber tube.

9. The oil-proof structure for the temperature element lead according to claim 1, characterized in that, The outer wall of the first sleeve (4) is provided with microgrooves or roughened structure.

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