Laminated electrical cable penetration assembly and manufacturing method and sealing method thereof

Abstract

The invention discloses a laminated electrical cable penetration assembly and a manufacturing method and a sealing method thereof, and relates to the field of electrical cable penetration assembly structures, the laminated electrical cable penetration assembly comprises a pressure-bearing connecting shell, and the two ends of the pressure-bearing connecting shell are a high-voltage end and a low-voltage end respectively; a penetrating through hole is formed in the pressure-bearing connecting shell to penetrate through the high-voltage end and the low-voltage end, and a limiting part is arranged at the position, close to the low-voltage end, in the penetrating through hole; a bottom supporting plug, a plurality of laminations and a top pressing plug are arranged in the penetrating through hole from the limiting part, and threading holes matched in position are formed in the bottom supporting plug, the plurality of laminations and the top pressing plug; electrical cables sequentially pass through the threading holes of the coaxial lines; the high-pressure end is connected with a pressing mechanism used for pressing the top pressing plug. And an adhesive is filled in the penetrating through hole, and gaps between the inner wall of the penetrating through hole, the bottom supporting plug, the plurality of laminations, the top pressing plug and the hole wall of the threading hole and the electrical cable. According to the invention, a good sealing effect can be achieved in a high-pressure-difference environment.

Description

Technical Field

[0001] The invention relates to the field of electrical wire penetration piece structures, in particular to a laminated electrical cable penetration piece and a manufacturing method and a sealing method thereof. Background Art

[0002] In pressure-bearing equipment, in order to lead out the signal line of the sensor installed in the pressure-bearing equipment, an electrical cable penetration is usually required to achieve this; when the pressure difference between the inside and outside of the pressure-bearing equipment is large, the penetration of ordinary structure cannot withstand the pressure difference and causes leakage, that is, the penetration of ordinary structure can only withstand the pressure difference below the rated pressure. Once the pressure difference is too large, it is easy to cause the pressure-bearing equipment to be unable to maintain stable pressure or the medium to leak, causing pollution or safety hazards.

[0003] For this purpose, a penetration is required that can withstand high pressure differences. Summary of the invention

[0004] The purpose of the present invention is to provide a laminated electrical cable penetration and a manufacturing method and a sealing method thereof in order to solve the above-mentioned problems, which can achieve good sealing effect in an environment with high pressure difference.

[0005] The technical solution adopted by the present invention is as follows: a laminated electrical cable penetration, comprising a pressure-bearing connection shell, wherein the two ends of the pressure-bearing connection shell are respectively a high-pressure end in a high-pressure environment and a low-pressure end in a low-pressure environment; there is a through hole on the pressure-bearing connection shell that penetrates the high-pressure end and the low-pressure end, and a limiting portion is arranged at a position close to the low-pressure end in the through hole; in the through hole, a bottom support plug, a plurality of laminates and a top clamping plug are arranged in sequence from the limiting portion to the other end of the through hole, and the bottom support plug, the plurality of laminates and the top clamping plug are all provided with threading holes with matching positions; there are threading holes for electrical cables to pass through the coaxial line in sequence; the high-voltage end is connected to a clamping mechanism for clamping the top clamping plug; in the through hole, the inner wall of the through hole, the bottom support plug, the plurality of laminates, the top clamping plug and the gap between the threading hole wall and the electrical cable are filled with adhesive.

[0006] Furthermore, the limiting portion is a conical surface, and the contact surface between the bottom support plug and the limiting portion is also a conical surface, and the two conical surfaces match.

[0007] Furthermore, on all the laminations, the threading holes and the outer peripheries of the laminations are provided with chamfers, so that tapered portions are formed between adjacent laminations.

[0008] Furthermore, the clamping mechanism comprises a clamping cover nut threadedly connected to the high-pressure end, and the inner end surface of the clamping cover nut acts on the top clamping plug.

[0009] Furthermore, a compression pad is arranged between the compression cover nut and the top compression plug; one end of the compression pad is acted upon by the compression cover nut, and the other end of the compression pad acts on the top compression plug.

[0010] Furthermore, the surface of the compression pad that contacts the top compression plug is configured as a conical surface, and the surface of the top compression plug that contacts the compression pad is configured as a spherical surface; the conical surface contacts the spherical surface.

[0011] Furthermore, a circumferential positioning mechanism is provided between the top pressing plug and the inner wall of the through-hole, and the circumferential positioning mechanism limits the circumferential movement of the top pressing plug and allows the top pressing plug to move axially along the through-hole.

[0012] Furthermore, the circumferential positioning mechanism includes positioning grooves provided on the top compression plug and the through hole, and positioning pins located in the two positioning grooves on both sides; the positioning pins have a travel in the positioning grooves that moves axially along the through hole.

[0013] A method for manufacturing a laminated electrical cable penetration member, manufacturing the laminated electrical cable penetration member, comprising the following steps: A1: Preparation of parts; A2: stacking a bottom support plug, a plurality of laminations and a top pressing plug in the through hole in sequence, and while stacking, the electrical cable passes through the threading hole on each component; the stacking process includes A21-A22; A21: When stacking each component, adhesive is injected into the gaps and contact surfaces; A22: When stacking the top compression plugs, align the top compression plugs with the positioning grooves on the through holes, adjust the circumferential position of the top compression plugs, and install the positioning pins after stacking is completed; A3: Install the clamping mechanism so that it is pressed against the top clamping plug; A4: Wait for the adhesive to completely cure to complete the manufacture of the laminated electrical cable penetration.

[0014] A sealing method for a laminated electrical cable penetration piece, using the laminated electrical cable penetration piece, comprises the following steps: B1: The pressure at the high-pressure end acts on the top compression plug, which moves toward the low-pressure end, squeezing all the laminations; B2: The state changes of all laminates after being compressed include step B21-step B22; B21: The laminate undergoes axial micro-displacement after being compressed, and the axial micro-displacement of the laminate squeezes the adhesive between the laminates; B22: After the laminations are compressed, they undergo radial micro-deformation, the diameter of the laminations increases, squeezing the adhesive on the outside; at the same time, the diameter of the threading holes decreases, squeezing the adhesive at the threading holes; at the same time, the tapered parts between the laminations squeeze the adhesive inside the tapered parts; B3: The pressure on the adhesive increases and the sealing degree improves.

[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: The present invention is applied in an environment with a large pressure difference. The pressure at the high-pressure end acts on the top compression plug, and the top compression plug moves toward the low-pressure end to squeeze all the laminations. After all the laminations are compressed, on the one hand, axial micro-displacement occurs, and the axial micro-displacement of the laminations squeezes the adhesive located between the laminations. On the other hand, radial micro-deformation occurs, and the diameter of the laminations becomes larger, squeezing the adhesive located on the outside. At the same time, the diameter of the threading hole becomes smaller, squeezing the adhesive located at the threading hole. At the same time, the tapered part between the laminations squeezes the adhesive located in the tapered part. The degree of pressure on the adhesive increases, and the degree of sealing improves. It is effectively achieved that the greater the pressure difference, the higher the sealing performance, so that the penetration can play a good sealing effect in an environment with a high pressure difference, and achieve the effect of effectively stabilizing the pressure and avoiding leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will now be described by way of example with reference to the accompanying drawings, in which: Figure 1 It is a cross-sectional structural schematic diagram of the present invention; Markings in the figure: 1-pressure-bearing connecting shell; 11-low-pressure end; 12-high-pressure end; 13-limiting part; 2-bottom supporting plug; 3-laminate; 4-top clamping plug; 5-clamping pad; 6-clamping cover nut; 7-locating pin; 8-electrical cable; 9-adhesive. DETAILED DESCRIPTION

[0017] In the description of this specification, it should be noted that if the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, or is the orientation or position relationship in which the product of this specification is usually placed when used. It is only for the convenience of describing this specification and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this specification.

[0018] In addition, if the terms "horizontal" or "vertical" appear in the description of this specification, it does not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0019] In the description of this specification, it should also be noted that, unless otherwise clearly stipulated and limited, the terms "set", "installed", "connected" and "connected" should be understood in a broad sense. For example, the connection can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be a connection between the internal parts of two elements.

[0020] It should be noted that the "high pressure" and "low pressure" described in this specification are compared with the pressures in two environments. Taking a pressure vessel as an example, when the internal pressure of the pressure vessel is at the rated pressure (low-pressure vessel P=0.1~1.6Mpa; medium-pressure vessel P=1.6~10Mpa; high-pressure vessel P=10~100Mpa; ultra-high-pressure vessel P>100Mpa), the pressure is high pressure; the external pressure of the pressure vessel is standard atmospheric pressure, that is, low pressure; compared with the environments at both ends of the pressure connecting shell 1, the environment with relatively higher pressure is called high-pressure environment, and the environment with relatively lower pressure is called low-pressure environment.

[0021] Example 1 like Figure 1 As shown, a laminated electrical cable penetration piece comprises a pressure-bearing connection shell 1, the two ends of the pressure-bearing connection shell 1 are respectively a high-pressure end 12 in a high-pressure environment and a low-pressure end 11 in a low-pressure environment; there is a through hole on the pressure-bearing connection shell 1 that penetrates the high-pressure end 12 and the low-pressure end 11, and a limiting portion 13 is provided at a position close to the low-pressure end 11 in the through hole; in the through hole, a bottom support plug 2, a plurality of laminates 3 and a top clamping plug 4 are arranged in sequence from the limiting portion 13 to the other end of the through hole, and the bottom support plug 2, the plurality of laminates 3 and the top clamping plug 4 are all provided with threading holes with matching positions; there are threading holes for the electrical cable 8 to pass through the coaxial line in sequence; the high-pressure end 12 is connected to a clamping mechanism for clamping the top clamping plug 4; in the through hole, the inner wall of the through hole, the bottom support plug 2, the plurality of laminates 3, the top clamping plug 4 and the gap between the threading hole wall and the electrical cable 8 are filled with adhesive 9.

[0022] In this embodiment, the pressure-bearing connecting shell 1 is installed on the pressure-bearing equipment (such as a pressure vessel), welded to the pressure-bearing equipment, and can also be a part of the pressure-bearing equipment; the high-pressure end 12 is located inside the pressure-bearing equipment, such as inside the pressure vessel, and the low-pressure end 11 is located outside the pressure-bearing equipment, such as outside the pressure vessel; the limiting portion 13 limits the components in the through-hole from detaching from the through-hole, which is the basis for the seal formed under pressure.

[0023] In this embodiment, when the high-pressure end 12 and the low-pressure end 11 of the pressure-bearing connecting shell 1 are subjected to a pressure difference, the pressure of the high-pressure end 12 will act on the top compression plug 4, pushing the top compression plug 4 toward the low-pressure end 11, and the top compression plug 4 will move slightly along the through hole toward the low-pressure end 11. Since the bottom support plug 2 is restricted by the limiting portion 13, the bottom support plug 2 will not move, thereby achieving the extrusion of the laminate 3; when the laminate 3 is extruded, on the one hand, axial micro-displacement occurs, and the axial micro-displacement of the laminate squeezes the adhesive located between the laminates; on the other hand, radial micro-deformation occurs, the diameter of the laminate becomes larger, squeezing the adhesive located on the outside; at the same time, the diameter of the threading hole becomes smaller, squeezing the adhesive located at the threading hole; the adhesive is squeezed to achieve effective sealing.

[0024] In this embodiment, the greater the pressure difference between the high-pressure end 12 and the low-pressure end 11 of the pressure-bearing connecting shell 1, the greater the preload force on the adhesive 9 at each position, and the more stable the seal formed by the laminate 3, so that the penetration piece can have a good sealing effect in a high pressure difference environment, thereby achieving the effect of effectively stabilizing the pressure and avoiding leakage.

[0025] In this embodiment, the adhesive 9 is preferably a high-strength epoxy resin.

[0026] Example 2 Based on Example 1, a specific implementation method that can be implemented is further proposed.

[0027] A feasible implementation method is that the limiting portion 13 is a conical surface, and the contact surface between the bottom support plug 2 and the limiting portion 13 is also a conical surface, and the two conical surfaces match; on the one hand, relative to the step surface, the conical surface has sufficient material at the force-bearing position as the limiting surface, has a stronger pressure-bearing capacity, and has a better limiting effect, and at the same time, there will be no torque affecting the limiting effect; on the other hand, the conical surface can effectively solve the influence of the shape and position errors of the bottom support plug 2 and the limiting portion 13 generated during processing, and ensure that the bottom support plug 2 and the limiting portion 13 can be connected circumferentially, so that when under pressure, the force is evenly distributed in the circumferential direction.

[0028] A feasible implementation manner is that the threading holes and the outer periphery of the laminate 3 on all the laminates 3 are provided with chamfers, so that a conical portion is formed between adjacent laminates 3, and the conical portion forms a conical seal. When the laminate 3 is under pressure, the laminate 3 is deformed, and the chamfer angle at the chamfer will be reduced, such as from 45° to 30°, that is, the adhesive 9 at the position of the conical portion will be squeezed by the chamfered surface to form a conical seal; if the medium at the high-pressure end 12 leaks, it needs to move along the conical surface of the conical portion, and due to the existence of the cone angle and the adhesive 9 being squeezed to fill the cone angle position, it is difficult for the medium to move along the cone surface, thereby further improving the sealing performance.

[0029] A feasible implementation manner, the clamping mechanism includes a clamping cover nut 6 threadedly connected to the high-pressure end 12, the inner end surface of the clamping cover nut 6 acts on the top clamping plug 4, and the degree of threaded connection between the clamping cover nut 6 and the high-pressure end 12 is adjusted to adjust the initial pressure exerted on the top clamping plug 4. The initial pressure is based on ensuring that the penetration piece can remain in a sealed state when there is no pressure difference between the high-pressure end 12 and the low-pressure end 11.

[0030] It should be noted that the compression cover nut 6 has a through hole to allow the gas cable 8 to pass through, while allowing the top compression plug 4 to be subjected to the pressure of the high-pressure end 12 .

[0031] A feasible implementation method is that a compression pad 5 is arranged between the compression cover nut 6 and the top compression plug 4; one end of the compression pad 5 is acted upon by the compression cover nut 6, and the other end of the compression pad 5 acts on the top compression plug 4, and the compression cover nut 6 compresses the top compression plug 4 through the compression pad 5.

[0032] Furthermore, the surface of the compression pad 5 that contacts the top compression plug 4 is set to a conical surface, and the surface of the top compression plug 4 that contacts the compression pad 5 is set to a spherical surface; the conical surface is in contact with the spherical surface; similarly, compared with the plane contact, the contact between the conical surface and the spherical surface can effectively solve the influence of the shape and position errors generated by the two bottom contact surfaces during processing, and ensure that they can be connected in the circumferential direction, so that when under pressure, the force is evenly distributed in the circumferential direction, thereby transmitting pressure evenly.

[0033] A feasible implementation manner is that a circumferential positioning mechanism is provided between the top compression plug 4 and the inner wall of the through-hole, which limits the circumferential movement of the top compression plug 4 and allows the top compression plug 4 to move axially along the through-hole, i.e., prevents the rotation of the compression cover nut 6 when it is threadedly connected to the high-pressure end 12 from being transmitted to the top compression plug 4, effectively prevents the top compression plug 4 from rotating, and further prevents the electrical cable 8 from twisting and deforming.

[0034] Furthermore, the circumferential positioning mechanism includes positioning grooves provided on the top clamping plug 4 and the through-hole, and positioning pins 7 respectively located in the two positioning grooves on both sides, and circumferential constraint is performed by the cooperation between the positioning pins 7 and the positioning grooves; the positioning pin 7 has a stroke of axial movement along the through-hole in the positioning groove, and it is feasible that the axial size of the positioning groove in the through-hole is larger than the positioning pin 7.

[0035] Example 3 A method for manufacturing a laminated electrical cable penetration member, manufacturing the laminated electrical cable penetration member, comprising the following steps: A1: Prepare components; the components include a pressure-bearing connection shell 1, a bottom support plug 2, a plurality of stacked sheets 3, a top compression plug 4, a compression cover nut 6, a compression pad 5, and a positioning pin 7, etc.; A2: stacking a bottom support plug 2, a plurality of stacked sheets 3 and a top pressing plug 4 in the through hole in sequence, and while stacking, an electrical cable 8 passes through a threading hole on each component; the stacking process includes A21-A22; A21: When stacking each component, the adhesive 9 is injected into the gap and the contact surface, so that each component, especially the laminate 3, is surrounded by the adhesive 9. A22: When stacking the top compression plug 4, the top compression plug 4 is aligned with the positioning groove on the through hole, and the circumferential position of the top compression plug 4 is adjusted. After the stacking is completed, the positioning pin 7 is installed; A3: Install the clamping mechanism so that it is pressed against the top clamping plug 4; A4: Wait for the adhesive 9 to be completely cured to complete the manufacture of the laminated electrical cable penetration.

[0036] Example 4 A sealing method for a laminated electrical cable penetration piece, using the laminated electrical cable penetration piece, comprises the following steps: B1: The pressure at the high-pressure end acts on the top compression plug, which moves toward the low-pressure end, squeezing all the laminations; B2: The state changes of all laminates after being compressed include step B21-step B22; B21: The laminate undergoes axial micro-displacement after being compressed, and the axial micro-displacement of the laminate squeezes the adhesive between the laminates; B22: After the laminations are compressed, they undergo radial micro-deformation, the diameter of the laminations increases, squeezing the adhesive on the outside; at the same time, the diameter of the threading holes decreases, squeezing the adhesive at the threading holes; at the same time, the tapered parts between the laminations squeeze the adhesive inside the tapered parts; B3: The pressure on the adhesive increases and the sealing degree improves.

[0037] The present invention is not limited to the above-mentioned specific embodiments, but extends to any new features or any new combination disclosed in this specification, as well as any new method or process steps or any new combination disclosed.

Claims

1. A laminated electrical cable penetration, characterized in that: The invention comprises a pressure-bearing connection shell (1), wherein two ends of the pressure-bearing connection shell (1) are respectively a high-pressure end (12) in a high-pressure environment and a low-pressure end (11) in a low-pressure environment; a through hole is provided on the pressure-bearing connection shell (1) to penetrate the high-pressure end (12) and the low-pressure end (11), and a limiting portion (13) is provided at a position close to the low-pressure end (11) in the through hole; and a bottom support plug (2), a plurality of laminated sheets (3) and a plurality of laminations (3) are arranged in sequence in the through hole from the limiting portion (13) to the other end of the through hole. A top compression plug (4), the bottom support plug (2), the plurality of laminated sheets (3) and the top compression plug (4) are all provided with threading holes with matching positions; there are threading holes for the electrical cables (8) to pass through the coaxial lines in sequence; the high voltage end (12) is connected to a compression mechanism for compressing the top compression plug (4); and the through hole, the inner wall of the through hole, the bottom support plug (2), the plurality of laminated sheets (3), the top compression plug (4) and the gap between the wall of the threading hole and the electrical cable (8) are filled with adhesive (9).

2. The laminated electrical cable penetration according to claim 1, characterized in that: The limiting portion (13) is a conical surface, and the contact surface between the bottom support plug (2) and the limiting portion (13) is also a conical surface, and the two conical surfaces match.

3. The laminated electrical cable penetration according to claim 1, characterized in that: On all the laminations (3), the threading holes and the outer periphery of the laminations (3) are provided with chamfers, so that a tapered portion is formed between adjacent laminations (3).

4. The laminated electrical cable penetration according to claim 1, characterized in that: The clamping mechanism comprises a clamping cover nut (6) threadedly connected to the high-pressure end (12), and the inner end surface of the clamping cover nut (6) acts on the top clamping plug (4).

5. The laminated electrical cable penetration according to claim 4, characterized in that: A compression pad (5) is provided between the compression cover nut (6) and the top compression plug (4); one end of the compression pad (5) is acted upon by the compression cover nut (6), and the other end of the compression pad (5) acts on the top compression plug (4).

6. The laminated electrical cable penetration according to claim 5, characterized in that: The surface of the compression pad (5) in contact with the top compression plug (4) is configured as a conical surface, and the surface of the top compression plug (4) in contact with the compression pad (5) is configured as a spherical surface; the conical surface is in contact with the spherical surface.

7. The laminated electrical cable penetration according to any one of claims 4 to 6, characterized in that: A circumferential positioning mechanism is provided between the top pressing plug (4) and the inner wall of the through hole, and the circumferential positioning mechanism limits the circumferential movement of the top pressing plug (4) and allows the top pressing plug (4) to move axially along the through hole.

8. The laminated electrical cable penetration according to claim 7, characterized in that: The circumferential positioning mechanism comprises positioning grooves formed on the top compression plug (4) and the through hole, and positioning pins (7) located in the two positioning grooves on both sides; the positioning pins (7) have a travel in the positioning grooves along the axial direction of the through hole.

9. A method for manufacturing a laminated electrical cable penetration, manufacturing the laminated electrical cable penetration according to any one of claims 1 to 8, characterized in that: The following steps are involved: A1: Preparation of parts; A2: stacking a bottom support plug (2), a plurality of stacked sheets (3) and a top pressing plug (4) in the through hole in sequence, and while stacking, an electrical cable (8) passes through a threading hole on each component; the stacking process includes A21-A22; A21: When stacking each component, adhesive (9) is injected into the gaps and contact surfaces; A22: When stacking the top compression plugs (4), the circumferential position of the top compression plugs (4) is adjusted so that the top compression plugs (4) and the positioning grooves on the through holes are aligned. After the stacking is completed, the positioning pins (7) are installed. A3: Install the clamping mechanism so that it is pressed against the top clamping plug (4); A4: Wait for the adhesive (9) to completely cure, and the manufacture of the laminated electrical cable penetration is completed.

10. A sealing method for a laminated electrical cable penetration, applied to the laminated electrical cable penetration according to any one of claims 1 to 8, characterized in that: The following steps are involved: B1: The pressure at the high-pressure end (12) acts on the top compression plug (4), and the top compression plug (4) moves toward the low-pressure end (11), squeezing all the laminated sheets (3); B2: the state changes of all the laminates (3) after being compressed include steps B21 and B22; B21: After the laminate (3) is compressed, an axial micro-displacement occurs. The axial micro-displacement of the laminate (3) squeezes the adhesive (9) located between the laminates (3); at the same time, the tapered portion between the laminates (3) squeezes the adhesive (9) located inside the tapered portion; B22: After the laminate (3) is compressed, it undergoes radial micro-deformation, the diameter of the laminate (3) increases, squeezing the adhesive (9) located on the outside; at the same time, the diameter of the threading hole decreases, squeezing the adhesive (9) located at the threading hole; B3: The pressure on the adhesive (9) increases, and the sealing degree improves.

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