Sealing assembly for preventing oil leakage of element outgoing line

Abstract

The utility model relates to the technical field of sealing devices, and discloses a sealing assembly for oil seepage prevention of an element outgoing line, which is used for installing a measuring element on instrument equipment and comprises an installation nut, a compression nut and a compression ring, and the instrument equipment is provided with a corresponding installation hole; one end of the mounting nut is in threaded connection with the mounting hole, the other end of the mounting nut is in threaded connection with the compression nut, a mounting cavity is axially formed in the mounting nut, a sealing plug is arranged in the mounting cavity, a lead hole for a lead to pass through is formed in the sealing plug, the compression nut is provided with a compression part, and the compression ring is arranged between the sealing plug and the compression part. By arranging the compression ring between the sealing plug and the compression nut, damage caused by overlarge torsion amplitude of the sealing plug when the compression nut rotates to drive the sealing plug to rotate is avoided, so that the sealing plug cannot be damaged due to torsion under the condition that the lead is sealed, and the sealing plug can be reused after later replacement.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing devices, and particularly relates to a sealing assembly for preventing oil leakage from the lead-out wires of components. Background Art

[0002] Oil leakage from the lead-out wires of measuring components such as the bearing bush temperatures of small turbines, compressors, steam-driven feed pumps and circulating pumps in thermal power units, the metal temperatures of steam turbine bearings, bearing bush temperatures, axial displacements, vibrations, rotational speeds, etc. is a difficult problem that plagues many power plants. Such problems can, at the least, affect the appearance of the equipment and increase the operation and maintenance costs of the equipment, and at the worst, lead to insulation failures and affect the operation safety of the equipment. Existing treatment methods include on-site replacement of damaged parts, glue filling and plugging, etc., but there are still problems such as the inability to perform maintenance without power outage, high costs, or poor plugging effects.

[0003] Therefore, there is a need to provide a sealing assembly to fundamentally solve the problem of oil leakage from the lead-out wires of components, reduce the workload of on-site maintenance, and enable the components replaced later to be reused, thereby reducing the maintenance costs. Content of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the utility model provides a sealing assembly for preventing oil leakage from the lead-out wires of components, enabling the components replaced later to be reused and reducing the maintenance costs.

[0005] To achieve the above object, the utility model adopts the following technical solution: A sealing assembly for preventing oil leakage from the lead-out wires of components, used for installing measuring components on instrument equipment, includes a mounting nut, a compression nut and a pressure ring. Corresponding mounting holes are provided on the instrument equipment; one end of the mounting nut is threadedly connected to the mounting hole, and the other end of the mounting nut is threadedly connected to the compression nut. An installation cavity is axially provided in the mounting nut, a sealing plug is arranged in the installation cavity, a lead hole for the lead wire to pass through is provided on the sealing plug, the compression nut is provided with a compression part, and the pressure ring is arranged between the sealing plug and the compression part.

[0006] The principle of this solution is as follows: An installation cavity is axially arranged inside the installation nut, and an elastic sealing plug is embedded in the cavity. A lead hole for the element lead wire to pass through is machined on the sealing plug. Through the cooperation of the compression nut and the pressure ring, during the process of tightening the compression nut, the sealing plug is deformed by the pressure ring, thereby strengthening the sealing of the lead wire, enabling the lead wire to pass through smoothly and achieving a good sealing effect, avoiding oil leakage at the lead wire. At the same time, in order to further enhance the sealing performance and protect the sealing plug, the compression nut is specially designed with a compression part that can apply uniform pressure to the sealing plug, and a pressure ring is configured between the two as an auxiliary support and buffer medium. By optimizing the tightening operation process, damage to the sealing plug caused by excessive rotation of the compression nut during the sealing process is effectively avoided, thus ensuring that the sealing plug can still maintain good sealing performance and durability after multiple disassembly and assembly, greatly reducing the additional cost brought by component replacement, achieving efficient anti-oil leakage of the element lead wire, and also improving the maintainability and economy of the entire system.

[0007] The beneficial effect of this solution is: By setting a pressure ring between the sealing plug and the compression nut, it is avoided that the compression nut drives the sealing plug to rotate when it rotates, resulting in excessive torsion amplitude of the sealing plug and causing damage. This enables the sealing plug to be free from damage due to torsion while ensuring the sealing of the lead wire, and it can be reused after replacement later.

[0008] Furthermore, the compression part is in smooth contact with the annular surface of the pressure ring, and the compression part can rotate smoothly on the annular surface of the pressure ring. By reducing the roughness of the contact surface between the compression part and the pressure ring, the rotational friction between the compression nut and the pressure ring is reduced, avoiding that when tightening the compression nut, the compression nut drives the pressure ring to rotate, and then drives the sealing plug to rotate, causing the sealing plug to twist axially and reducing the sealing effect of the sealing plug on the lead wire.

[0009] Furthermore, the diameter of the sealing plug is less than or equal to the diameter of the installation cavity. By designing the diameter of the sealing plug to be less than or equal to the diameter of the installation cavity, it is ensured that during the installation process, the sealing plug can be easily and accurately inserted into the installation cavity, which not only simplifies the assembly steps but also avoids problems such as difficulty in inserting the sealing plug or incorrect placement due to size mismatch.

[0010] Furthermore, the number of lead holes is 1 - 8. The number of lead holes can be selected or customized according to the actual number of element lead wires to ensure that each lead wire can pass through accurately and be effectively sealed and protected, preventing oil or other media from leaking through the lead holes, thus ensuring the reliability and accuracy of the entire measurement system.

[0011] Furthermore, the sealing plug is cylindrical, and the axis connection lines of the lead holes are evenly distributed on an imaginary circle concentric with the sealing plug. The axis connection lines of all the lead holes are evenly distributed on an imaginary circle concentric with the sealing plug. The purpose of such a design is to ensure that when the compression nut is tightened, the pressure generated on the sealing plug can be evenly transmitted to the periphery of each lead hole, so that the sealing plug remains balanced during the stress deformation process, avoiding the situation of insufficient or excessive local stress resulting in poor sealing. Thus, it effectively prevents the occurrence of oil leakage caused by uneven deformation of the sealing plug, enhances the stability and reliability of the entire sealing assembly, ensures that the sealing performance between the component lead and the device always remains in an ideal state, and reduces potential leakage risks and maintenance costs.

[0012] Furthermore, the diameter of the lead hole is 0.5 - 15 mm larger than that of the lead. First of all, the lead hole slightly larger than the lead diameter enables the lead to be easily passed through the lead hole during installation without excessive external force, simplifies the assembly steps, and at the same time avoids the risk of difficult lead insertion or damage to the lead insulation layer due to too small a hole diameter. Secondly, leaving a certain gap allows the sealing plug to undergo slight deformation after being subjected to the pressure of the compression nut. When the pressure is evenly transmitted to the periphery of the lead hole, the sealing plug material can slightly expand and tightly fit the surface of the lead, thereby forming a tight and firm sealing effect, effectively preventing the penetration of oil or other media through the lead hole, ensuring the stable and reliable sealing performance between the component lead and the sealing assembly, reducing the potential leakage risk during the operation of the device, and further enhancing the safety and durability of the overall device.

[0013] Furthermore, the compression part has magnetism, and the pressure ring is made of magnetic material. The compression part is specially designed with a magnetic function, and the pressure ring is made of magnetic material. This enables the compression part and the pressure ring to be adsorbed to each other through magnetic force, thus achieving quick alignment and stable connection during installation without cumbersome manual positioning operations. When the pressure ring needs to be placed on the compression part, it can be automatically adsorbed just by approaching, greatly simplifying the assembly process, improving the operation convenience and work efficiency of the operators. At the same time, the magnetic connection method also ensures the tight fit between the compression part and the pressure ring, helps to improve the sealing effect and stability of the entire sealing assembly, ensures that the component lead can be effectively protected against oil leakage under various working conditions, and further strengthens the practicality and reliability of the present utility model.

[0014] Furthermore, the pressure ring is rotatably arranged on the compression part.

[0015] Beneficial effects: The pressure ring is designed to be rotatably arranged on the pressing part, enabling the pressure ring to be fixed to the pressing part in a rotating manner and not easily fall off, effectively avoiding the situation where the pressure ring may be lost due to accidental slipping during disassembly and assembly. At the same time, the rotatable design of the pressure ring also means that the operator does not need to spend extra time looking for a suitable position to align during installation or disassembly. Simply rotate the pressure ring to accurately dock with components such as the sealing plug and the component lead wire, significantly improving work efficiency and assembly accuracy, reducing the time cost of equipment maintenance, and thus reflecting the high efficiency and convenience of the present utility model in practical applications. Brief Description of the Drawings

[0016] Figure 1 It is a three-dimensional exploded structure schematic diagram of Embodiment 1 of the present utility model;

[0017] Figure 2a It is a split structure schematic diagram of Embodiment 1 of the present utility model;

[0018] Figure 2b It is Figure 2a a cross-sectional view taken along line A-A in

[0019] Figure 3 It is a three-dimensional exploded structure schematic diagram of Embodiment 2 of the present utility model;

[0020] Figure 4a It is a split structure schematic diagram of Embodiment 2 of the present utility model;

[0021] Figure 4b It is Figure 4a a cross-sectional view taken along line B-B in

[0022] Figure 5a It is a split structure schematic diagram of Embodiment 3;

[0023] Figure 5b It is Figure 5a a cross-sectional view taken along line C-C in Detailed Description of the Preferred Embodiments

[0024] The following is a further detailed description through specific embodiments:

[0025] The reference numerals in the accompanying drawings of the specification include: mounting nut 1, sealing table 11, sealing plug 2, lead hole 21, chamfer 22, pressure ring 3, compression nut 4, pressing part 41.

[0026] Embodiment 1

[0027] A sealing assembly for preventing oil leakage of component lead wires, used to install a measuring component on an instrument and equipment, such as Figure 1As shown, it includes an installation nut 1, a compression nut 4 and a pressure ring 3. Corresponding installation holes are provided on the instrument and equipment. The middle section of the installation nut 1 is a regular hexagonal prism structure, and external threads are provided at both ends. The lower end of the installation nut 1 is threadedly connected to the installation hole, and the upper end of the installation nut 1 is threadedly connected to the compression nut 4. As Figure 2a , Figure 2b shown, the inner wall of the installation nut 1 is provided with an upper through hole and a lower through hole. The diameter of the upper through hole is larger than that of the lower through hole. The transition between the upper through hole and the lower through hole forms a sealing platform 11. The sealing platform 11 and the inner wall of the upper through hole form an installation cavity. A cylindrical sealing plug 2 is arranged in the installation cavity. The diameter of the sealing plug 2 is less than or equal to the diameter of the installation cavity. Preferably, the diameter of the sealing plug 2 is 0.1-1 mm smaller than the diameter of the installation cavity. A lead hole 21 for the lead to pass through is provided on the sealing plug 2. The diameter of the lead hole 21 is 0.5-15 mm larger than that of the lead, preferably 0.5-8 mm. Thus, while facilitating the lead to pass through the lead hole 21, the risk of leakage from the lead hole 21 is reduced. The number of lead holes 21 is 1-8. In this embodiment, taking 2 lead holes 21 as an example, the axis connection lines of the two lead holes 21 are evenly distributed on a hypothetical circle concentric with the sealing plug 2.

[0028] As Figure 2a , Figure 2b shown, the compression nut 4 is provided with a compression part 41, and the pressure ring 3 is arranged between the sealing plug 2 and the compression part 41.

[0029] The specific implementation process is as follows: During installation, first, a sealing gasket is sleeved on the lower end of the installation nut 1, and then the installation nut 1 is installed on the instrument and equipment to be measured, so as to prevent fuel, heat-conducting oil or lubricating oil, etc. in the instrument and equipment from leaking from the installation hole; Subsequently, the measuring component is installed inside the instrument to be measured, and the lead is passed through the lower through hole, the upper through hole, the lead hole 21, the pressure ring 3 and the compression nut 4 at one time. Finally, the sealing plug 2 is placed into the installation cavity, the lower surface of the sealing plug 2 is made to contact the sealing platform 11 through the pressure ring 3, and the compression nut 4 is tightened.

[0030] Embodiment 2

[0031] Referring to Figure 3 , Figure 4a and Figure 4b , Embodiment 2 is basically the same as Embodiment 1, except that the sealing plug 2 in Embodiment 2 is provided with 6 lead holes 21, and a chamfer 22 is provided at the bottom of the sealing plug, so as to facilitate the sealing plug to be placed into the installation cavity. At the same time, the compression part 41 of the compression nut 4 has magnetism, and the pressure ring 3 is made of a magnetic material. When the pressure ring 3 needs to be placed on the compression part 41, it can be automatically adsorbed just by approaching, greatly simplifying the assembly process and improving the operation convenience and work efficiency of the operator.

[0032] Embodiment 3

[0033] Reference Figure 5a and Figure 5b Example 3 is basically the same as Example 1, except that the pressing ring 3 is rotatably arranged on the pressing part 41.

[0034] The pressing ring 3 can be fixed to the pressing part 41 in a rotating manner and is not easy to fall off, effectively avoiding the situation that the pressing ring 3 may be lost due to accidental slipping during disassembly and assembly. At the same time, the rotatable design of the pressing ring 3 also means that the operator does not need to spend extra time looking for a suitable position to align during installation or disassembly. Just simply rotate the pressing ring 3 to accurately dock with components such as the sealing plug 2 and the component lead wire, significantly improving the work efficiency and assembly accuracy, reducing the time cost of equipment maintenance, and thus reflecting the high efficiency and convenience of the practical application of the present utility model.

[0035] The above are only the embodiments of the present utility model. Specific technical solutions and / or common knowledge such as characteristics well known in the art are not described in detail herein. It should be pointed out that for those skilled in the art, without departing from the technical solution of the present utility model, several modifications and improvements can still be made, and these should also be regarded as the protection scope of the present utility model, and these will not affect the implementation effect of the present utility model and the practicality of the patent. The protection scope required by this application should be based on the content of its claims, and the specific implementation manners described in the specification can be used to interpret the content of the claims.

Claims

1. A sealing assembly for preventing oil leakage from a component lead wire, used for mounting a measuring component on an instrument, characterized in that: It includes a mounting nut, a clamping nut and a pressing ring, and a corresponding mounting hole is arranged on the instrument and equipment; one end of the mounting nut is threadedly connected to the mounting hole, and the other end of the mounting nut is threadedly connected to the clamping nut, an mounting cavity is arranged axially of the mounting nut, a sealing plug is arranged in the mounting cavity, a lead hole for the lead wire to pass through is arranged on the sealing plug, a clamping part is arranged on the clamping nut, and the pressing ring is arranged between the sealing plug and the clamping part.

2. A sealing assembly for preventing oil leakage of component lead wires according to claim 1, characterized in that: The pressing part is in smooth contact with the annular surface of the pressing ring, and the pressing part can rotate smoothly on the annular surface of the pressing ring.

3. A sealing assembly for preventing oil leakage of component lead wires according to claim 2, characterized in that: The diameter of the sealing plug is less than or equal to the diameter of the installation cavity.

4. A sealing assembly for preventing oil leakage of component lead wires according to claim 3, characterized in that: The number of lead holes is 1-8.

5. A sealing assembly for preventing oil leakage of component lead wires according to claim 1, characterized in that: The sealing plug is a cylinder, and the axis connecting lines of the lead holes are evenly distributed on an imaginary circle concentric with the sealing plug.

6. A sealing assembly for preventing oil leakage of component lead wires according to claim 1, characterized in that: The lead hole diameter is 0.5-15mm larger than the lead.

7. A sealing assembly for preventing oil leakage of a component lead wire according to any one of claims 1 to 6, characterized in that: The pressing part is magnetic, and the pressing ring is made of magnetic material.

8. A sealing assembly for preventing oil leakage of a component lead wire according to any one of claims 1 to 6, characterized in that: The pressing ring is rotatably arranged on the pressing part.

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