Cross winding embedded type metal shielding capacitor sleeve

Abstract

The utility model relates to a cross winding embedded type metal shielding capacitor sleeve which comprises a conducting rod, an insulating cylinder and a sealing assembly. Two ends of the conducting rod are respectively an air end and a hydrogen end, the air end is welded with a circular plate, and the hydrogen end is sleeved and welded with a first flange; the insulating cylinder sleeves the conducting rod, and two ends of the insulating cylinder extend out of the conducting rod and are sleeved with the second flange; the sealing assembly is arranged at the end of the insulating cylinder close to the circular plate for sealing. First and second voltage equalizing rings are arranged at two ends of the insulating cylinder to equalize an electric field; the conducting rod is sleeved with a brass ferrule to be matched with the sealing assembly. A lug and a gasket are arranged on the conducting rod close to the first flange end; the sealing assembly comprises a ring, a nut and a rubber ring; the conducting rod is provided with a through hole and a beryllium bronze sheet; a convex part, a pressing ring, a sealing ring and a second rubber ring are arranged outside the insulating cylinder; through the structural design, the insulating property of the capacitor bushing is improved, the internal medium is ensured not to leak, and the capacitor bushing has good conductivity, sealing property and structural stability.

Description

TECHNICAL FIELD

[0001] The utility model relates to high voltage and insulation technical field, concretely relates to a cross winding embedded metal shield capacitor bushing. BACKGROUND

[0002] The traditional outgoing line bushing is a porcelain bottle type outgoing line bushing. The material is brittle, and under the conditions of external force impact (such as collision in the transportation process, careless bumping during installation, etc.), natural disasters such as earthquakes or internal stress unevenness, etc., it is easy to appear the phenomenon of rupture, damage. Once the porcelain bottle is broken, not only the normal function of the outgoing line bushing will be affected, but also electrical failure may be caused, and even the safety of surrounding personnel and equipment is threatened, so it is necessary to design an outgoing line bushing with good structure, dense material, better toughness than the porcelain bottle type outgoing line bushing when impacted or vibrated, and not easy to break. SUMMARY

[0003] The utility model aims at overcoming the above-mentioned defects, and provides a cross winding embedded metal shield capacitor bushing, which improves the insulation performance through reasonable structure design, effectively adjusts the electric field intensity by providing a first voltage equalizing ring and a second voltage equalizing ring at both ends of the insulating cylinder, and designs a sealing assembly to ensure that the internal medium of the bushing does not leak.

[0004] Technical scheme: the utility model provides a cross winding embedded metal shield capacitor bushing, which comprises: a conductive rod, the two ends of the conductive rod are air end and hydrogen end respectively, a circular plate is welded at the end of the air end, and a first flange is sleeved and welded at the end of the hydrogen end; an insulating cylinder, the insulating cylinder is sleeved outside the conductive rod, the two ends of the conductive rod extend out of the insulating cylinder, a second flange is sleeved on the insulating cylinder, the circular plate and the second flange are air end, the second flange and the first flange are hydrogen end, and the circular plate and the second flange are both outside the insulating cylinder; a sealing assembly, the sealing assembly is arranged at the end of the insulating cylinder close to the circular plate, and is used for sealing the junction of the insulating cylinder and the conductive rod. The conductive rod is a key component for current transmission, and the two ends of the conductive rod are connected with the air end and the hydrogen end respectively, so that the conductive requirement in different environments can be realized. The insulating cylinder is sleeved outside the conductive rod, which effectively isolates the conductive rod from the external environment and prevents current leakage.

[0005] Further, the cross winding embedded metal shield capacitor bushing in the application, the end of the insulating cylinder close to the circular plate is sleeved with a first voltage equalizing ring, and the end away from the circular plate is sleeved with a second voltage equalizing ring, the first voltage equalizing ring and the second voltage equalizing ring are both provided with mounting holes along the radial side of the insulating cylinder and are installed on the insulating cylinder through screws, and the first voltage equalizing ring cooperates with the sealing assembly. The first voltage equalizing ring and the second voltage equalizing ring are sleeved at the two ends of the insulating cylinder respectively, and can balance the electric field distribution.

[0006] Further, the cross-wound embedded metal shielded capacitor bushing in the application, the conductive rod is also sleeved with a brass sleeve ring, the brass sleeve ring is welded on the part of the conductive rod extending out of the insulating cylinder and provided with a round plate, and the brass sleeve ring is matched with the sealing assembly. The brass sleeve ring is matched with the sealing assembly, and the insulating cylinder and the conductive rod are cooperated at the joint. On the one hand, it can provide certain support or support for the sealing assembly in structure, so that the sealing assembly can better fit in the corresponding position, enhance the sealing effect, on the other hand, the cooperation is also helpful to create a relatively stable electric field environment in the sealing area, avoid the adverse effects on the electric field distribution caused by the sealing operation or the existence of the sealing component, thereby guaranteeing the electrical performance of the capacitor bushing in the area.

[0007] Further, the cross-wound embedded metal shielded capacitor bushing in the application, the conductive rod is also sleeved with a brass sleeve ring, the brass sleeve ring is welded on the part of the conductive rod extending out of the insulating cylinder and provided with a round plate, and the brass sleeve ring is matched with the sealing assembly. The brass sleeve ring is matched with the sealing assembly, and the insulating cylinder and the conductive rod are cooperated at the joint. On the one hand, it can provide certain support or support for the sealing assembly in structure, so that the sealing assembly can better fit in the corresponding position, enhance the sealing effect, on the other hand, the cooperation is also helpful to create a relatively stable electric field environment in the sealing area, avoid the adverse effects on the electric field distribution caused by the sealing operation or the existence of the sealing component, thereby guaranteeing the electrical performance of the capacitor bushing in the area.

[0008] Further, the cross-wound embedded metal shielded capacitor bushing in the application, the sealing assembly comprises a ring, a nut and a group of rubber rings, the ring is sleeved on the conductive rod, one end extends out of the insulating cylinder and abuts against the brass sleeve ring, the other end extends into the insulating cylinder, the ring is provided with a groove, the rubber ring is arranged in the groove, the nut is sleeved on the part of the ring extending out of the insulating cylinder, the nut is provided with a mounting hole on the side surface in the axial direction of the insulating cylinder, and the nut is mounted on the first voltage-sharing ring through a screw. The ring is used as the main structural component of the sealing assembly, is sleeved on the conductive rod, and two ends abut against the brass sleeve ring and extend into the insulating cylinder respectively, and preliminary sealing coverage is formed at the joint of the insulating cylinder and the conductive rod. The part of the ring extending out of the insulating cylinder is in close contact with the brass sleeve ring, which can effectively block the external substances from entering the joint from this direction. The rubber ring is arranged in the groove of the ring, and the good elasticity and sealing performance of the rubber material can further enhance the sealing effect. The nut is sleeved on the part of the ring extending out of the insulating cylinder, and plays a role of fastening and connection.

[0009] Further, the cross-wound embedded metal shielded capacitor bushing in the application, the conductive rod is also provided with a group of through holes and beryllium bronze sheets, the through holes and the beryllium bronze sheets are arranged in the insulating cylinder and close to the ring, and the beryllium bronze sheets are riveted on the conductive rod through rivets. The beryllium bronze sheet is used to form an electromagnetic field with the whole bushing.

[0010] Further, the cross-wound embedded metal shielding capacitor bushing in the application is provided with a convex portion and a pair of pressing rings on the outer side of the insulating cylinder in the circumferential direction, the second flange sleeve is arranged on the convex portion, the convex portion is used for fixing the second flange, the pressing ring is sleeved on the insulating cylinder and is oppositely arranged on the two sides of the second flange, the pressing ring is provided with mounting holes in the axial and radial directions of the insulating cylinder, and the mounting holes are respectively mounted on the second flange and the insulating cylinder through screws, the side of the pressing ring facing the second flange is provided with a groove, and a sealing ring is embedded in the groove.

[0011] Further, the cross-wound embedded metal shielding capacitor bushing in the application is provided with a convex portion and a pair of pressing rings on the outer side of the insulating cylinder in the circumferential direction, the second flange sleeve is arranged on the convex portion, the convex portion is used for fixing the second flange, the pressing ring is sleeved on the insulating cylinder and is oppositely arranged on the two sides of the second flange, the pressing ring is provided with mounting holes in the axial and radial directions of the insulating cylinder, and the mounting holes are respectively mounted on the second flange and the insulating cylinder through screws, the side of the pressing ring facing the second flange is provided with a groove, and a sealing ring is embedded in the groove.

[0012] Further, the cross-wound embedded metal shielding capacitor bushing in the application is provided with a convex portion and a pair of pressing rings on the outer side of the insulating cylinder in the circumferential direction, the second flange sleeve is arranged on the convex portion, the convex portion is used for fixing the second flange, the pressing ring is sleeved on the insulating cylinder and is oppositely arranged on the two sides of the second flange, the pressing ring is provided with mounting holes in the axial and radial directions of the insulating cylinder, and the mounting holes are respectively mounted on the second flange and the insulating cylinder through screws, the side of the pressing ring facing the second flange is provided with a groove, and a sealing ring is embedded in the groove.

[0013] Further, the cross-wound embedded metal shielding capacitor bushing in the application is provided with a convex portion and a pair of pressing rings on the outer side of the insulating cylinder in the circumferential direction, the second flange sleeve is arranged on the convex portion, the convex portion is used for fixing the second flange, the pressing ring is sleeved on the insulating cylinder and is oppositely arranged on the two sides of the second flange, the pressing ring is provided with mounting holes in the axial and radial directions of the insulating cylinder, and the mounting holes are respectively mounted on the second flange and the insulating cylinder through screws, the side of the pressing ring facing the second flange is provided with a groove, and a sealing ring is embedded in the groove.

[0014] The above technical scheme can be seen that the cross-wound embedded metal shielding capacitor bushing has the following beneficial effects:

[0015] 1. The cross-wound embedded metal shielding capacitor bushing is provided with silver plating on the outer side of the conductive rod from the round plate to the brass ring end and the specific part of the first flange, so that the resistance is greatly reduced, the current transmission is more smooth, the loss of electric energy in the transmission process is reduced, the efficient transmission of electric energy is ensured, the related electrical equipment can operate in a better state, and the damage of the equipment caused by overheating due to electric energy loss is avoided.

[0016] 2. The cross-wound embedded metal shielding capacitor bushing is made of glass fiber and epoxy resin, the strong insulation performance can tightly separate the conductive rod from the outside world and prevent the occurrence of electric leakage, the risk of electric leakage is eliminated, the safety of the personnel around the electrical equipment and other equipment is effectively ensured, and the electrical equipment is not disturbed by abnormal current, and the first and second voltage-sharing rings on the insulating cylinder are matched to optimize the electric field distribution and further enhance the insulation effect, prevent the insulation breakdown problem, and ensure the stable operation of the equipment in different voltage environments. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 Fig. 1 is a schematic diagram of a cross-wound embedded metal shielding capacitor bushing structure of the present application;

[0018] Figure 2 Fig. 2 is an exploded schematic diagram of the cross-wound embedded metal shielding capacitor bushing of the present application;

[0019] Figure 3 Fig. 3 is a sectional schematic diagram of the cross-wound embedded metal shielding capacitor bushing of the present application;

[0020] Figure 4 Fig. 4 is a schematic diagram of a second flange structure of the cross-wound embedded metal shielding capacitor bushing of the present application;

[0021] Figure 5 Fig. 5 is a schematic diagram of a second flange compression ring and a second rubber ring structure of the cross-wound embedded metal shielding capacitor bushing of the present application;

[0022] Figure 6 Fig. 6 is a schematic diagram of a cross-wound embedded metal shielding capacitor bushing of the present application.

[0023] The drawing reference signs of the specification are as follows: 100 - conductive rod, 101 - air end, 102 - hydrogen end, 103 - round plate, 104 - first flange, 105 - brass ring, 106 - crossbar, 107 - crossbar hole, 108 - gasket, 109 - through hole, 110 - beryllium bronze sheet, 200 - insulating cylinder, 201 - second flange, 202 - first equalizing ring, 203 - second equalizing ring, 204 - convex part, 205 - compression ring, 206 - sealing ring, 207 - second rubber ring, 208 - nameplate, 300 - sealing assembly, 301 - ring, 302 - nut, 303 - rubber ring. DETAILED DESCRIPTION

[0024] The present application will be further illustrated below in combination with the drawings and specific embodiments.

[0025] Embodiment 1

[0026] As Figure 1 , 2The cross-winding embedded metal shielding capacitor bushing shown in 1, 2, 3, 4, 5, 6 comprises: a conductive rod 100, the two ends of the conductive rod 100 are respectively air end 101 and hydrogen end 102, the air end 101 end is welded with a round plate 103, and the hydrogen end 102 end is sleeved and welded with a first flange 104; an insulating cylinder 200, the insulating cylinder 200 is sleeved on the outside of the conductive rod 100, the conductive rod 100 extends out of the insulating cylinder 200 at both ends, the insulating cylinder 200 is sleeved with a second flange 201, the air end 101 is between the round plate 103 and the second flange 201, the hydrogen end 102 is between the second flange 201 and the first flange 104, and the round plate 103 and the second flange 201 are both outside the insulating cylinder 200; a sealing assembly 300, the sealing assembly 300 is arranged at the end of the insulating cylinder 200 close to the round plate 103, and is used for sealing the junction of the insulating cylinder 200 and the conductive rod 100. The conductive rod 100 is used as a key component for current transmission, and the two ends thereof are connected with the air end 101 and the hydrogen end 102 respectively, so that the conductive requirement in different environments can be realized. The insulating cylinder 200 is sleeved on the outside of the conductive rod 100, so that the conductive rod 100 is effectively isolated from the external environment, and current leakage is prevented. The second flange 201 is further provided with a nameplate 208.

[0027] In the embodiment, the end of the insulating cylinder 200 close to the round plate 103 is sleeved with a first voltage-sharing ring 202, and the end away from the round plate 103 is sleeved with a second voltage-sharing ring 203, the first voltage-sharing ring 202 and the second voltage-sharing ring 203 are provided with mounting holes along the radial side of the insulating cylinder 200 and are mounted on the insulating cylinder 200 through screws, and the first voltage-sharing ring 202 cooperates with the sealing assembly 300. The first voltage-sharing ring 202 and the second voltage-sharing ring 203 are sleeved at the two ends of the insulating cylinder 200 respectively, and can balance the electric field distribution.

[0028] In the embodiment, the conductive rod 100 is further sleeved with a brass sleeve ring 105, the brass sleeve ring 105 is welded on the section of the conductive rod 100 extending out of the insulating cylinder 200 and provided with the round plate 103, and the brass sleeve ring 105 cooperates with the sealing assembly 300. The brass sleeve ring 105 cooperates with the sealing assembly 300 to play a synergistic role at the junction of the insulating cylinder 200 and the conductive rod 100. On the one hand, it can provide certain support or rely on for the sealing assembly 300 in structure, so that the sealing assembly 300 can better fit in the corresponding position and enhance the sealing effect, on the other hand, such cooperation is also helpful to create a relatively stable electric field environment in the sealing area, avoiding the adverse effects of sealing operation or the existence of sealing components on the electric field distribution, so as to protect the electrical performance of the capacitor bushing in the area.

[0029] In this embodiment, the electrically conductive rod 100 is provided with a set of lugs 106 near the first flange 104 end, the lugs 106 are in the insulating cylinder 200, and are installed on the electrically conductive rod 100 through the corresponding lug hole 107 provided on the electrically conductive rod 100, and the lugs 106 and the electrically conductive rod 100 are clamped with a gasket 108. The lugs 106 help to improve the stability of the overall structure of the capacitor bushing.

[0030] In this embodiment, the sealing assembly 300 includes a ring 301, a nut 302, and a set of rubber rings 303. The ring 301 is sleeved on the electrically conductive rod 100, one end extends out of the insulating cylinder 200 and abuts against the brass sleeve ring 105, and the other end extends into the insulating cylinder 200. The ring 301 is provided with a groove, and the rubber ring 303 is arranged in the groove. The nut 302 is sleeved on the part of the ring 301 extending out of the insulating cylinder 200, and is provided with a mounting hole on the side surface in the axial direction of the insulating cylinder, and is mounted on the first equalizing ring 202 by screws. The ring 301 serves as the main structural component of the sealing assembly 300, is sleeved on the electrically conductive rod 100, and the two ends abut against the brass sleeve ring 105 and extend into the insulating cylinder 200 respectively, forming a preliminary sealing cover for the junction between the insulating cylinder 200 and the electrically conductive rod 100. The part extending out of the insulating cylinder 200 is in close contact with the brass sleeve ring 105, which can effectively prevent external substances from entering the junction from this direction. The rubber ring 303 is arranged in the groove of the ring 301, and the good elasticity and sealing performance of the rubber material further enhance the sealing effect. The nut 302 is sleeved on the part of the ring 301 extending out of the insulating cylinder 200, and plays a role of fastening and connection.

[0031] In this embodiment, the electrically conductive rod 100 is also provided with a set of through holes 109 and beryllium bronze sheets 110, which are arranged in the insulating cylinder 200 and close to the ring 301. The beryllium bronze sheets 110 are riveted on the electrically conductive rod 100 by rivets. The beryllium bronze sheets 110 form an electromagnetic field with the bushing as a whole.

[0032] In this embodiment, the insulating cylinder 200 is provided with a protrusion 204 and a pair of pressing rings 205 on the outer side in the circumferential direction. The second flange 201 is sleeved on the protrusion 204, and the protrusion 204 is used to fix the second flange 201. The pressing rings 205 are sleeved on the insulating cylinder 200 and are oppositely arranged on both sides of the second flange 201. The pressing rings 205 are provided with mounting holes in the axial and radial directions of the insulating cylinder 200, and are mounted on the second flange 201 and the insulating cylinder 200 by screws respectively. The side of the pressing ring 205 facing the second flange 201 is provided with a groove, and a sealing ring 206 is embedded in the groove. The sealing ring 206 is embedded in the groove on the side of the pressing ring 205 facing the second flange 201, and the sealing ring 206 can play a sealing role between the pressing ring 205 and the second flange 201.

[0033] In the embodiment, a group of recesses are arranged on the inner side wall of the second flange 201, and a second rubber ring 207 is embedded in the recesses. The second rubber ring 207 is embedded in the recesses on the inner side wall of the second flange 201, and mainly functions as a sealing.

[0034] In the embodiment, the outer side of the conductive rod 100 is electroplated with silver from the round plate 103 to the brass collar 105, and the first flange 104 is electroplated with silver away from the side of the second voltage-sharing ring 203 along the radial direction of the conductive rod 100. Silver is a metal with excellent electrical conductivity, which reduces the resistance and reduces the loss of electric energy in the transmission process.

[0035] In the embodiment, the insulating cylinder 200 is made of glass fiber and epoxy resin. The insulating cylinder 200 made of glass fiber and epoxy resin has excellent insulation performance. The insulating cylinder is cross-wound with glass sand, has a certain winding angle, and also has a certain margin at both ends, is long, and is finally cut off. The bending resistance of the insulating cylinder is improved, the toughness is good, and a metal material is used as a capacitor voltage-sharing plate to uniformly distribute the radial and axial electric field, thereby improving the overall insulation performance of the capacitor bushing.

[0036] The above embodiments are exemplary, and the purpose is to illustrate the technical concept and characteristics of the utility model, so that those skilled in the art can understand the content of the utility model and implement it accordingly, and the protection scope of the utility model cannot be limited thereby. Any equivalent changes or modifications made according to the spirit and essence of the utility model should be covered within the protection scope of the utility model.

Claims

1. A cross-wound embedded metal shielded capacitor bushing, characterized by: include: A conductive rod (100), wherein the two ends of the conductive rod (100) are respectively an air end (101) and a hydrogen end (102), the air end (101) is welded with a circular plate (103), and the hydrogen end (102) is sleeved and welded with a first flange (104); an insulating tube (200), wherein the insulating tube (200) is sleeved outside the conductive rod (100), and the insulating tube (200) is extended from both ends of the conductive rod (100), and the insulating tube (200) is sleeved with a second flange (201 ), the air end (101) is between the circular plate (103) and the second flange (201), and the hydrogen end (101) is between the second flange (201) and the first flange (104), and the circular plate (103) and the second flange (201) are both outside the insulating cylinder (200); a sealing component (300), the sealing component (300) is arranged at the end of the insulating cylinder (200) close to the circular plate (103), and is used for sealing at the junction of the insulating cylinder (200) and the conductive rod (100).

2. The cross-wound embedded metal shielded capacitor bushing according to claim 1, characterized in that: The end of the insulating tube (200) close to the circular plate (103) is sleeved with a first equalizing ring (202), and the end away from the circular plate (103) is sleeved with a second equalizing ring (203). The first equalizing ring (202) and the second equalizing ring (203) are both provided with mounting holes along the radial side of the insulating tube (2) and are mounted on the insulating tube (200) by screws. The first equalizing ring (202) cooperates with the sealing assembly (300).

3. The cross-wound embedded metal shielded capacitor bushing according to claim 2, characterized in that: The conductive rod (100) is also provided with a brass ferrule (105), which is welded to a section of the conductive rod (100) extending out of the insulating tube (200) and provided with a circular plate (103), and the brass ferrule (105) cooperates with the sealing assembly (300).

4. The cross-wound embedded metal shielded capacitor bushing according to claim 3, characterized in that: The conductive rod (100) is provided with a set of latches (106) near the end of the first flange (104). The latches (106) are located in the insulating tube (200) and are mounted on the conductive rod (100) through corresponding latch holes (107) provided on the conductive rod (100). A gasket (108) is sandwiched between the latches (106) and the conductive rod (100).

5. The cross-wound embedded metal shielded capacitor bushing according to claim 4, characterized in that: The sealing assembly (300) includes a ring (301), a nut (302), and a group of rubber rings (303). The ring (301) is sleeved on the conductive rod (100), one end of which extends out of the insulating tube (200) and abuts against the brass ferrule (105), and the other end extends into the insulating tube (200). The ring (301) is provided with a groove, and the rubber ring (303) is provided in the groove. The nut (302) is sleeved on the portion of the ring (301) extending out of the insulating tube (200). The nut (302) is provided with a mounting hole on the side surface along the axial direction of the insulating tube and is mounted on the first voltage-equalizing ring (202) by a screw.

6. The cross-wound embedded metal shielded capacitor bushing according to claim 5, characterized in that: The conductive rod (100) is further provided with a group of through holes (109) and a beryllium bronze sheet (110). The through holes (109) and the beryllium bronze sheet (110) are both provided in the insulating cylinder (200) and close to the ring (301). The beryllium bronze sheet (110) is riveted to the conductive rod (100) by rivets.

7. The cross-wound embedded metal shielded capacitor bushing according to claim 6, characterized in that: The outer circumference of the insulating cylinder (200) is provided with a convex portion (204) and a pair of pressure rings (205); the second flange (201) is sleeved on the convex portion (204); the convex portion (204) is used to fix the second flange (201); the pressure ring (205) is sleeved on the insulating cylinder (200) and is relatively arranged on both sides of the second flange (201); the pressure ring (205) is provided with mounting holes along the axial and radial directions of the insulating cylinder (200) and is respectively mounted on the second flange (201) and the insulating cylinder (200) by screws; the pressure ring (205) is provided with a groove on the side facing the second flange (201), and a sealing ring (206) is embedded in the groove.

8. The cross-wound embedded metal shielded capacitor bushing according to claim 7, characterized in that: A group of grooves are provided on the inner side wall of the second flange (201), and a second rubber ring (207) is embedded in the grooves.

9. The cross-wound embedded metal shielded capacitor bushing according to claim 8, characterized in that: The outer side of the conductive rod (100) is electroplated with silver from the circular plate (103) to the brass ferrule (105), and the first flange (104) is electroplated with silver along the side of the conductive rod (100) radially away from the second equalizing ring (203).

10. The cross-wound embedded metal shielded capacitor bushing according to any one of claims 1 to 9, characterized in that: The insulating cylinder (200) is made of glass fiber and epoxy resin.

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