WO2022062894A1 - 穿墙套管 - Google Patents

穿墙套管 Download PDF

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Publication number
WO2022062894A1
WO2022062894A1 PCT/CN2021/116947 CN2021116947W WO2022062894A1 WO 2022062894 A1 WO2022062894 A1 WO 2022062894A1 CN 2021116947 W CN2021116947 W CN 2021116947W WO 2022062894 A1 WO2022062894 A1 WO 2022062894A1
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WO
WIPO (PCT)
Prior art keywords
hole
conductive rod
wall
wall bushing
transition
Prior art date
Application number
PCT/CN2021/116947
Other languages
English (en)
French (fr)
Inventor
马斌
刘超
Original Assignee
江苏神马电力股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN202011015783.2A external-priority patent/CN112186679A/zh
Priority claimed from CN202011018229.XA external-priority patent/CN112310913A/zh
Priority claimed from CN202011015775.8A external-priority patent/CN112310912A/zh
Application filed by 江苏神马电力股份有限公司 filed Critical 江苏神马电力股份有限公司
Priority to EP21871266.9A priority Critical patent/EP4199281A1/en
Priority to BR112023005121A priority patent/BR112023005121A2/pt
Priority to US18/245,304 priority patent/US20230368947A1/en
Publication of WO2022062894A1 publication Critical patent/WO2022062894A1/zh

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B17/00—Insulators or insulating bodies characterised by their form
    • H01B17/56—Insulating bodies
    • H01B17/58—Tubes, sleeves, beads, or bobbins through which the conductor passes
    • H01B17/583—Grommets; Bushings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B17/00—Insulators or insulating bodies characterised by their form
    • H01B17/26—Lead-in insulators; Lead-through insulators
    • H01B17/30—Sealing
    • H01B17/303—Sealing of leads to lead-through insulators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B17/00—Insulators or insulating bodies characterised by their form
    • H01B17/26—Lead-in insulators; Lead-through insulators
    • H01B17/30—Sealing
    • H01B17/301—Sealing of insulators to support
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B17/00—Insulators or insulating bodies characterised by their form
    • H01B17/36—Insulators having evacuated or gas-filled spaces

Definitions

  • the present application relates to the technical field of power transmission insulation equipment, in particular to a wall bushing.
  • the wall bushing as the only electrical component connecting the inside and outside of the valve hall, carries the full voltage and current of the entire line, and its performance reliability is related to the operation safety and stability of the entire line.
  • the head components of the existing wall bushings are mostly corrugated pipes, the conductive rods and the corrugated pipes are axially sealed, and the conductive rods pass through the corrugated pipes to be directly electrically connected to external components.
  • One end is fixed with the end of the wall bushing, and the other end of the conductive rod is fixed with the corrugated pipe and extends out of the corrugated pipe for electrical connection with external components.
  • the elastic corrugated pipe provides tension to the conductive rod to maintain
  • the bellows can be elastically deformed, so that the conductive rod is still in a straight state without stress bending, but there are the following problems: the head assembly of the wall bushing adopts When using bellows, if axial sealing is used, the long-term reliability of the dynamic seal cannot be guaranteed due to the friction effect of long-term thermal expansion and cold contraction, and the product is prone to air leakage; if axial sealing is not used, an external transition tank needs to be installed and wiring A soft connection is required between the terminal and the conductive rod, and the flow capacity is limited; and the bellows itself is expensive, which increases the manufacturing cost of the product; metal chips are easily generated between the conductive rod and the head assembly due to friction, resulting in internal discharge.
  • the purpose of the present invention is to provide a wall-penetrating sleeve, which has a simple structure, omits the structure of a bellows, can avoid the use of an axial dynamic sealing device, and greatly improves product sealing. reliability while reducing production costs.
  • a wall-penetrating bushing including a head assembly and a conductive rod, and a terminal that seals the head assembly and the conductive rod, and between the terminal and the conductive rod;
  • the head assembly includes a transition tank and a transition plate that are connected to each other; the upper end of the transition tank is provided with a first through hole, and the lower end of the transition tank passes through; the transition plate is provided with a second through hole, and the conductive rod passes through the first through hole and the second through hole, the transition tank and the transition plate are fixedly connected, so that the transition tank surrounds the conductive rod to form a receiving cavity.
  • the wall-penetrating sleeve has a simple structure, the arrangement of the transition tank omits the structure of a bellows, and the axial dynamic sealing device can be avoided, thereby greatly improving the sealing reliability of the product, and at the same time reducing the production cost.
  • the wall bushing further includes a protective cover
  • the protective cover is a ring-shaped casing that penetrates up and down
  • the protective cover is installed on the lower end of the head assembly around the second through hole
  • the conductive rod passes through the first through hole, the second through hole and the second through hole.
  • the setting of the protective cover further prevents possible metal chips or other debris from entering the main insulating cavity of the wall bushing, thereby improving the reliability of product operation.
  • the protective cover is made of metal, and a gap is set between the protective cover and the conductive rod. It can prevent the secondary friction between the protective cover and the conductive rod from producing metal scraps, and the metal protective cover can also play a certain shielding role and improve the reliability of product operation.
  • the wall-penetrating sleeve further includes a protective bellows
  • the protective bellows is a ring-shaped casing that penetrates up and down
  • the protective bellows is respectively provided with an upper through hole and a lower through hole
  • the conductive rod passes through the first through hole and the second through hole.
  • the protective bellows is provided with an upper connecting end around the upper through hole, the upper connecting end is fixedly connected with the lower end of the head assembly around the second through hole, and the lower through hole is fixedly connected with the conductive rod.
  • the arrangement of the protective bellows further prevents possible metal chips or other debris from entering the main insulating cavity of the wall bushing, thereby improving the reliability of product operation.
  • the upper connecting end is a flange extending along the radial direction of the upper through hole, and the flange is attached to and fixedly connected to the lower end of the head assembly.
  • the flange plate and the head assembly are connected by a plate-type plane, which is easy to install and has a reliable structure.
  • a mounting hole is provided on the flange, a channel communicating with each other is provided between the mounting hole and the upper through hole, the filter element is installed in the mounting hole, and the filter element is only used for gas exchange between the inside of the protective bellows and the outside of the protective bellows.
  • the filter element is only used for gas exchange between the inside of the protective bellows and the outside of the protective bellows. In the process of inflating and deflating the wall bushing, only gas is allowed to pass through, and the internal impurities and metal chips cannot enter the main insulation cavity through the filter element.
  • the diameter of the lower through hole is smaller than the minimum inner diameter of the protective bellows
  • a lower connecting end is provided around the lower through hole
  • a first round nut and a second round nut are respectively arranged on both sides of the lower connecting end.
  • the round nut is respectively connected with the conductive rod to clamp the lower connecting end through screw connection, so that the protective bellows is fixedly connected with the conductive rod.
  • the protective bellows is fixedly connected with the conductive rod.
  • the protective bellows there is no gap between the protective bellows and the conductive rod to ensure that impurities and metal chips in the protective bellows will not enter the main insulating cavity; on the other hand, the conductive rod is in the In the case of thermal expansion and cold contraction, the protective bellows has a certain elastic deformation space, and the size will change correspondingly with the deformation of the conductive rod, ensuring a stable connection between the various components of the wall bushing.
  • annular grooves are arranged around the side wall of the conductive rod in the transition tank.
  • the annular groove acts as a particle trap, adsorbing metal particles in the transition tank and ensuring stable electrical performance of the head of the wall bushing.
  • a first connection part extends from the lower end of the transition tank along the outer circumference of the transition tank, and the first connection part and the transition plate are sealedly connected.
  • the arrangement of the first connection part is convenient for the fixed connection of the transition tank and the transition plate, and the sealed connection can ensure that the transition tank is not invaded by moisture and avoid affecting the electrical performance.
  • the inner wall of the first through hole and/or the inner wall of the second through hole is provided with a non-metal lining. Avoid the friction between the conductive rod, the transition plate and the transition tank to generate metal chips, and improve the reliability of product operation.
  • the wiring terminal includes a wiring part, an accommodating part and a second connecting part in sequence, the accommodating part is used for accommodating the end of the conductive rod and is electrically connected with the conductive rod, and the second connecting part is sealedly connected with the upper end of the transition tank .
  • the terminal is the electrical connection component of the wall bushing, which is used for electrical connection with other equipment.
  • the arrangement of the second connecting portion is convenient for the fixed connection of the terminal and the transition tank.
  • the end of the conductive rod is provided with a spring contact finger, the spring contact finger abuts the inner wall of the accommodating part, and a gap exists between the accommodating part and the end of the conductive rod along the axial direction of the conductive rod.
  • the spring contact finger is in close contact with the terminal and the end of the conductive rod at the same time, so that there is a stable electrical connection between the terminal and the end of the conductive rod, which can maintain the equipotential of the head assembly and solve the problem of head heating.
  • a gap exists between the accommodating portion and the end of the conductive rod along the axial direction of the conductive rod, which can absorb the deformation of the conductive rod due to thermal expansion and cold contraction, and avoid the conductive rod from being bent due to the fixed connection.
  • the lower surface of the transition plate is provided with a convex ring around the second through hole.
  • the arrangement of the convex ring increases the supporting area of the conductive rod, and can improve the bending resistance of the conductive rod.
  • the wall bushing further includes a hollow insulator, the flange of the hollow insulator is sealed with the lower surface of the transition plate, and the conductive rod penetrates through the hollow insulator.
  • Hollow insulators provide insulation protection for the inner conductor of the wall bushing.
  • FIG. 1 is a partial cross-sectional view of a wall bushing 100 according to an embodiment of the present invention
  • FIG. 2 is a partial cross-sectional view of a wall bushing 100 according to another embodiment of the present invention.
  • FIG. 3 is a partial cross-sectional view of the wall bushing 200 according to an embodiment of the present invention.
  • FIG. 4 is a partial cross-sectional view of a wall bushing 200 according to another embodiment of the present invention.
  • FIG. 5 is a partial cross-sectional view of a wall bushing 200 according to another embodiment of the present invention.
  • FIG. 6 is a perspective view of a protective bellows 250 according to an embodiment of the present invention.
  • FIG. 7 is an overall cross-sectional view of a filter element 260 according to an embodiment of the present invention.
  • FIG. 8 is a partial cross-sectional view of a wall bushing 300 according to an embodiment of the present invention.
  • FIG. 9 is a partial cross-sectional view of a wall bushing 300 according to another embodiment of the present invention.
  • FIG. 10 is a partial cross-sectional view of a wall bushing 300 according to another embodiment of the present invention.
  • FIG. 11 is a partial cross-sectional view of a wall bushing 400 according to an embodiment of the present invention.
  • FIG. 12 is a cross-sectional view of a terminal 440 according to an embodiment of the present invention.
  • FIG. 13 is a partial cross-sectional view of a wall bushing 400 according to another embodiment of the present invention.
  • FIG. 14 is a partial cross-sectional view of a wall bushing 400 according to another embodiment of the present invention.
  • FIG. 15 is a partial cross-sectional view of a wall bushing 500 according to an embodiment of the present invention.
  • FIG. 16 is an overall cross-sectional view of a wall bushing 500 according to an embodiment of the present invention.
  • FIG. 17 is a partial cross-sectional view of a wall bushing 500 according to another embodiment of the present invention.
  • FIG. 18 is an overall cross-sectional view of a wall bushing 500 according to another embodiment of the present invention.
  • FIG. 19 is a partial cross-sectional view of a wall bushing 500 according to another embodiment of the present invention.
  • FIG. 20 is an overall cross-sectional view of a wall bushing 500 according to another embodiment of the present invention.
  • the wall bushing 100 includes a head assembly 110 and a conductive rod 120 and a connection terminal 140 that seals and covers the head assembly 110 and the conductive rod 120 (the drawing is for illustration only),
  • the terminal 140 is electrically connected with the conductive rod 120
  • the head assembly 110 includes a transition tank 111 and a transition plate 112 connected to each other; the upper end of the transition tank 111 is provided with a first through hole 1111, and the lower end of the transition tank 111 penetrates;
  • the plate 112 is provided with a second through hole 1121 , the conductive rod 120 passes through the first through hole 1111 and the second through hole 1121 , and the transition tank 111 and the transition plate 112 are fixedly connected so that the transition tank 111 surrounds the conductive rod 120 to form a receiving cavity 113 .
  • the structure of the through-wall sleeve 100 is simple, and the core components are the transition tank 111 and the transition plate 112.
  • the arrangement of the transition tank 111 omits the structure of the bellows. As long as the transition tank 111 can be ensured to be sealed, that is, the transition tank 111 is applied outside the transition tank 111.
  • the sealing measure can avoid using an axial dynamic sealing device between the transition tank 111 and the conductive rod 120, greatly improving the sealing reliability of the product, and at the same time reducing the production cost.
  • the sealing cover is provided with the terminal 140 of the head assembly 110 and the conductive rod 120, as long as the electrical connection with the conductive rod 120 is satisfied, and the electrical connection may be direct contact or internal conductors.
  • the shape and configuration of the connection terminal 140 is not specifically limited here.
  • the upper end and the lower end of the head assembly 110 are relative positions. The direction away from the head assembly 110 is downward.
  • the definitions of "above” and “below” are also based on this standard.
  • the head assembly can be an integrally formed cavity structure as long as it meets the requirements of the rigid assembly, that is, the head assembly will not deform and displace under the interference of external heat conditions. This ensures that the head assembly will not be deformed and displaced due to the change of the length of the conductive rod, thereby maintaining the stability of the overall structure of the wall bushing.
  • the transition plate 112 is a flat plate. In other embodiments, the shape of the transition plate is not particularly limited.
  • the transition tank 111 is a cylindrical tank, the upper end is provided with a first through hole 1111 , the lower end penetrates to form a cylindrical cavity, and the first through hole 1111 communicates with the cylindrical cavity.
  • the transition tank 111 is fixedly connected to the transition plate 112 and the conductive rods 120 are penetrated in the first through holes 1111 and the second through holes 1121 , the annular cavity surrounding the conductive rods 120 forms a receiving cavity 113 .
  • the shape of the transition tank may also be non-cylindrical, as long as it can be adapted to the connected components.
  • a plurality of annular grooves 1112 are arranged around the side wall of the conductive rod 120 in the transition tank 111 .
  • the annular groove 1112 acts as a particle trap, adsorbing the metal particles in the transition tank 111, and ensuring the electrical performance of the head of the through-wall bushing 100 is stable.
  • the number of annular grooves 1112 is four. In other embodiments, the number of annular grooves is not limited, and the specific number is reasonably designed according to the size of the inner wall of the transition tank. However, it can be understood that the more the number of annular grooves is, the better the effect of adsorbing metal particles is.
  • the shape of the annular groove 1112 is a rectangular groove.
  • the annular groove can also be an arc-shaped groove or an irregular-shaped groove, and the shape is not specifically limited here.
  • a first connection portion 1114 extends from the lower end of the transition tank 111 along the outer circumference of the transition tank 111 , and the first connection portion 1114 is sealed with the transition plate 112 .
  • the arrangement of the first connection portion 1114 facilitates the fixed connection of the transition tank 111 and the transition plate 112 , and the sealed connection can ensure that the transition tank 111 is not intruded by moisture, thereby avoiding affecting the electrical performance.
  • a first sealing groove 1122 is provided on the transition plate 112, and a first sealing ring (not shown in the figure) is provided in the first sealing groove.
  • the first sealing groove can also be provided on the first connecting part, or the first connecting part and the transition plate are both provided with a sealing groove, and a sealing ring is installed.
  • first connecting portion 1114 and the transition plate 112 are provided with corresponding through holes, and are fixedly connected by means of bolt connection (not shown in the figure).
  • connection method between the first connection portion and the transition plate may be adhesive bonding, welding, or a combination of the above fixed connection methods.
  • the part of the conductive rod 120 located on and above the transition tank 111 is a solid structure
  • the part of the conductive rod 120 located below the transition tank 111 is a hollow structure.
  • the solid structure portion of the conductive rod 120 can have good electrical conductivity
  • the hollow structure portion of the conductive rod 120 can reduce the weight of the conductive rod, thereby reducing the overall weight of the wall bushing 100 and reducing the cost.
  • the conductive rod may be a fully solid structure or a fully hollow structure, the conductive rod is located in the transition tank and above, and the hollow conductive rod may be provided with a larger wall thickness.
  • the wall bushing 100 of this embodiment is simple in structure, and the core components are the transition tank 111 and the transition plate 112.
  • the arrangement of the transition tank 111 omits the structure of the bellows, as long as the transition tank 111 can be sealed and arranged, that is, the transition tank 111
  • the external application of sealing measures can avoid the axial dynamic sealing device between the transition tank 111 and the conductive rod 120, which greatly improves the sealing reliability of the product and reduces the production cost.
  • the wall bushing 100 further includes a protective cover 150 .
  • the protective cover 150 is an annular casing 152 that penetrates up and down.
  • the protective cover 150 is installed on the head assembly around the second through hole 1121 .
  • the conductive rod 120 passes through the first through hole 1111 , the second through hole 1121 and the protective cover 150 .
  • the provision of the protective cover 150 further prevents metal chips or other debris that may be generated from entering the main insulating cavity of the wall bushing 100, thereby improving the reliability of product operation.
  • the protective cover 150 is made of metal material, and a gap is set between the protective cover 150 and the conductive rod 120 .
  • the setting of the gap can prevent the secondary friction between the protective cover 150 and the conductive rod 120 from generating metal chips, and the protective cover 150 made of metal can also play a certain shielding role to improve the operational reliability of the product.
  • the protective cover may also be made of non-metallic materials, as long as it can ensure that no metal chips are generated between the protective cover and the conductive rod due to secondary friction.
  • a curling edge 151 is formed on the side of the lower end of the protective cover 150 close to the conductive rod 120 , and there is a gap between the curling edge 151 and the conductive rod 120 .
  • the setting of the curling edge 151 can make the metal chips remain in the curling edge 151, and at the same time, the curling edge 151 will not produce sharp friction with the conductive rod 120, and will not generate more unnecessary metal chips due to accidental contact.
  • an annular cover connecting portion 153 extends outward from the upper end of the protective cover 150 around the outer circumference of the annular shell 152 of the protective cover 150 , and the cover connecting portion 153 is connected to the lower end of the head assembly 110
  • the lower end of the head assembly 110 is provided with threaded holes
  • the cover connecting portion 153 is provided with through holes corresponding to the above-mentioned threaded holes
  • the cover connecting portion 153 and the lower end of the head assembly 110 are connected by bolts to be fixed.
  • a threaded hole may also be provided in the connecting part of the cover body, a through hole corresponding to the above-mentioned threaded hole may be provided at the lower end of the head assembly, and the connecting part of the cover body and the lower end of the head assembly are also connected by bolts. way to be fixed. It should be noted that since there is no fixed connection between the conductive rod and the head assembly, the arrangement of the through holes and threaded holes of the bolt connection will not affect the assembly sequence of the wall bushing.
  • the protective cover 150 is an annular casing.
  • the shape of the annular casing can also be set to other shapes, such as square rings, elliptical rings and other shapes, which are not limited to in circular ring.
  • connection between the cover body connecting portion and the lower end portion of the head assembly may also be adhesive bonding, welding, etc., as long as the effective connection between the two can be ensured.
  • a wall bushing 200 is provided, and a convex ring 2123 is provided on the lower surface 2122 of the transition plate 212 around the second through hole 2121 .
  • the arrangement of the protruding ring 2123 increases the support area for the conductive rod 220 and can improve the bending resistance of the conductive rod 220 .
  • the convex ring 2123 may also be disposed on the upper surface of the transition plate 212 , as shown in FIG.
  • the arrangement of the protruding ring 2123 increases the support area for the conductive rod 220 and can improve the bending resistance of the conductive rod 220 .
  • the convex ring 2123 is arranged in the accommodating cavity 213 of the head assembly, and its height does not exceed the height of the transition tank 211 , that is, there is a gap between the upper end surface of the convex ring 2123 and the inner wall of the transition tank 211 , not in direct contact, it can be ensured that under the action of heat, even if the convex ring 2123 undergoes expansion deformation, it will not contact the inner wall of the transition tank 211, and will not deform the transition tank 211, ensuring that the wall bushing is 200 reliability of the overall structure.
  • the wall-penetrating sleeve 200 further includes a protective cover 250 , and the material and structure of the protective cover 250 are the same as those of the aforementioned protective cover 150 , and details are not repeated here.
  • convex rings can also be provided on the upper surface and the lower surface of the transition plate. The essence is to expand the contact area between the conductive rod and the transition plate, thereby increasing the supporting area for the conductive rod and improving the conductive rod. bending resistance.
  • the protruding ring 2123 is provided in the wall-penetrating sleeve 200 of this embodiment, the bending resistance of the conductive rod 220 can be improved, thereby improving the overall reliability of the product.
  • the wall-penetrating sleeve 200 includes a protective bellows 250 instead of the aforementioned protective cover 250 .
  • the protective bellows 250 is an annular casing that penetrates up and down.
  • the protective bellows 250 is respectively provided with an upper through hole 251 and a lower through hole 252, and the conductive rod 220 passes through the first through hole 2111, the second through hole 2121, the upper through hole
  • the through hole 251 and the lower through hole 252 the protective bellows 250 is provided with an upper connecting end 253 around the upper through hole 251, the upper connecting end 253 is fixedly connected to the lower end of the head assembly 210 around the second through hole 2121, and the lower through hole 252 is connected to the lower end of the head assembly 210.
  • the conductive rod 220 is fixedly connected, and the connection terminal 240 is electrically connected with the conductive rod 220 to seal and cover the head assembly 210 and the conductive rod 220 .
  • the wall-penetrating sleeve 200 has a simple structure, and the head assembly 210 replaces the traditional bellows structure, which can avoid the use of an axial dynamic sealing device, greatly improve the sealing reliability of the product, and at the same time can reduce the production cost; the arrangement of the protective bellows 250 further The metal chips or other chips that may be generated are prevented from entering the main insulating cavity of the wall bushing 200, and the operation reliability of the product is improved.
  • the protective bellows 250 is an annular casing.
  • the shape of the annular casing of the protective bellows can also be set to other shapes, such as a square ring, an elliptical ring, etc. The shape is not limited to circular rings.
  • the upper connecting end 253 is a flange 253 extending radially outward of the upper through hole 251 , and the flange 253 is attached to and fixedly connected to the lower end of the head assembly 210 .
  • the flange 253 and the head assembly 210 are connected by a disk-type plane, which is convenient to install and has a reliable structure.
  • the structure of the upper connecting end is not limited to this.
  • it can be a circular ring structure or a sawtooth structure extending along the upper through hole, and the lower end of the head assembly is provided with a matching groove for insertion, assisting Secure with adhesive.
  • a mounting hole 2531 is provided on the flange plate 253, a channel 2532 is provided between the mounting hole 2531 and the upper through hole 251, and the filter element 260 is installed in the mounting hole 2531, and the filter element 260 is only used for protection against corrugations
  • the inside of the tube 250 exchanges gas with the outside of the protective bellows 250 .
  • the filter element 260 only allows gas to pass through, and the internal impurities and metal chips cannot enter the main insulating cavity through the filter element 260 .
  • the number of the installation holes 2531 is three, and the corresponding number of the filter elements 260 is also three. In other embodiments, the number of the installation holes and the filter element only needs to be equal, and the specific number and the distance between different installation holes are not specifically limited.
  • the mounting hole 2531 is a through hole
  • the channel 2532 is provided on the surface of the flange 253 and is a straight groove connecting the mounting hole 2531 and the upper through hole 251 .
  • the channel 2532 is a channel for gas exchange between the inside of the protective bellows 250 and the outside of the protective bellows 250 .
  • the mounting hole may not be a through hole, a channel is provided between the bottom end of the mounting hole and the upper through hole, the channel is provided inside the flange, and cannot be observed from the surface of the flange. All in all, the shape and arrangement position of the channel are not limited, as long as the purpose of gas exchange between the inside of the protective bellows and the outside of the protective bellows can be achieved.
  • the filter element 260 includes a filter part 261 and a filter element connecting part 262 .
  • the filter part 261 is a columnar metal sintered mesh.
  • the side surface 2611 and the top surface 2612 of the filter part 261 are designed as one piece and are seamlessly connected.
  • the filter element connecting part 262 is a cylindrical structure that penetrates up and down, one end is connected with the through hole 2614, and the other end is the outlet, and the filter element connecting part 262 is provided with a thread 2621.
  • the mounting hole 2531 is provided with a thread that matches with the thread 2621.
  • the filter element 260 is a titanium rod filter element 260 with a metal mesh structure.
  • the titanium rod filter element 260 is a kind of industrial high-purity titanium as raw material.
  • the sintered porous filter element has excellent properties such as corrosion resistance, high temperature resistance, high strength, easy to ensure filtration accuracy, and easy regeneration.
  • the titanium rod filter element 260 has the following product features: uniform structure, narrow pore size distribution, high separation efficiency; high porosity, low filtration resistance, high penetration efficiency; high temperature resistance, generally can be used normally below 280 °C ; Good chemical stability, acid and alkali corrosion resistance, anti-oxidation performance; no particle shedding; good mechanical properties and simple operation.
  • the filter element can also be made of other sintered mesh materials with corrosion resistance, high temperature resistance, high strength, and easy guarantee of filtration accuracy, such as polytetrafluoroethylene, stainless steel and other materials.
  • the diameter of the lower through hole 252 is smaller than the minimum inner diameter of the protective bellows 250
  • a lower connecting end 254 is provided around the lower through hole 252
  • a first round nut 256 and a second circular nut 256 are respectively provided on both sides of the lower connecting end 254
  • the round nut 257 , the first round nut 256 and the second round nut 257 are respectively connected with the conductive rod 220 by screwing to clamp the lower connecting end 254 so that the protective bellows 250 is fixedly connected with the conductive rod 220 .
  • the protective bellows 250 is fixedly connected with the conductive rod 220.
  • the protective bellows 250 there is no gap between the protective bellows 250 and the conductive rod 220, so as to ensure that impurities and metal chips in the protective bellows 250 will not enter the main insulating cavity; , the conductive rod 220 is deformed under the condition of thermal expansion and cold contraction, the protective bellows 250 has a certain space for elastic deformation, and the size will change correspondingly with the deformation of the conductive rod 220, ensuring that the various components of the wall-penetrating sleeve 200 are stable connection between them.
  • the fixed connection between the protective bellows and the conductive rod may be other fixed connection methods such as welding, gluing, etc., and the fixed connection between the two does not require sealing.
  • the protective bellows 250 is made of metal material, and the protective bellows 250 made of metal can also play a certain shielding role, thereby improving the operational reliability of the product.
  • the protective bellows can also be made of non-metallic material, as long as it can ensure that no metal chips are generated between the protective bellows and the conductive rod due to secondary friction.
  • a cavity formed by the protective bellows 250, the conductive rod 220, the transition plate 212 and the filter element 260 is only allowed to perform gas exchange, There is no gap between the protective bellows 250 and the conductive rod 220, and only gas can be allowed to pass through under unsealed conditions; a channel 2532 and a filter element 260 are arranged between the protective bellows 250 and the transition plate 212, and the interior of the protective bellows 250 The metal particles inside the protective bellows 250 will be blocked by the filter element 260 and cannot migrate to the outside of the protective bellows 250.
  • the flange 253 and the transition plate 212 are provided with threaded holes on one side, the transition plate 212 is provided with through holes corresponding to the threaded holes, and the flange 253 and the transition plate 212 are threadedly connected by bolts.
  • the flange 253 is provided with threaded holes on the side that is in contact with the transition plate 212 instead of threaded holes on the transition plate 212, which is for assembly reasons, and this structure is more convenient for assembly.
  • the conductive rod 220 is provided with threads in the area below the transition plate 212 , and the assembly sequence of the wall bushing 200 is that after the other components are assembled, the second round nut 257 is set from the head of the conductive rod 220 to Then, screw it on the lower edge of the threaded area of the conductive rod 220 to prevent the nut from loosening due to vibration and other reasons, and then set the protective bellows 250 with the filter element 260 assembled down from the head of the conductive rod 220.
  • the upper through hole 251 is on the top
  • the lower through hole 252 is on the bottom
  • the lower connecting end 254 abuts the second round nut 257
  • the first round nut 256 is sleeved down from the head of the conductive rod 220 and screwed onto the conductive rod 220 up, and make the first round nut 256 abut the lower connecting end 254, that is, the first round nut 256 and the second round nut 257 are clamped on both sides of the lower connecting end 254 to fix the protective bellows 250 on the conductive rod 220
  • the transition plate 212 is set down from the head of the conductive rod 220, the through holes on the transition plate 212 correspond to the threaded holes on the flange 253, and the bolts are screwed through the through holes into the threaded holes to
  • the transition plate 212 is fixedly connected with the flange 253; the transition tank 211 is then sleeved down from the head of the conductive rod 220, and
  • connection structure in this embodiment is more convenient to assemble.
  • a non-metal lining 330 is added to the wall bushing 300 .
  • the inner wall of the first through hole 3111 and the inner wall of the second through hole 3121 are provided with a non-metallic lining 330 to avoid friction between the conductive rod 320 and the transition plate 312 and the transition tank 311 Metal particles, improve the reliability of product operation.
  • a non-metal lining may also be provided only on the inner wall of the first through hole or the inner wall of the second through hole.
  • the inner wall of the protruding ring 3123 is also provided with a non-metal lining 330 , wherein the protruding ring 3123 is provided on the lower surface of the transition plate 312 .
  • the non-metallic lining can be continuously arranged in the area where the conductive rod is in contact with other metal conductors, or can be arranged in sections, so that there is a gap between the conductive rod and other metal conductors, and the metal can be reduced or even avoided without contact. generation of particles.
  • the inner wall of the first through hole 3111 , the inner wall of the second through hole 3121 , and the inner wall of the convex ring 3123 are provided with a non-metallic lining 330 .
  • the convex ring 3123 is disposed on the upper surface of the transition plate 312 .
  • the inner wall of the convex ring 3123 is provided with a non-metal lining 330 .
  • the non-metal lining 330 avoids the friction between the conductive rod 320 and the transition plate 312 and the transition tank 311 to generate metal chips, thereby improving the operation reliability of the product.
  • the inner wall of the convex ring 3123 is provided with a plurality of grooves, and the non-metallic lining 330 is embedded in the grooves.
  • the non-metallic lining 330 can be embedded in the groove in the form of a broken ring, that is, the non-metallic lining 330 is a strip-shaped structure, not a full-circle structure.
  • the length of the non-metallic lining 330 can be adjusted according to the size of the groove, so that It is embedded in the groove, which is convenient for installation and construction.
  • the provision of grooves can reduce the amount of the non-metallic lining 330 and reduce the production cost; the non-metallic lining 330 in the form of a broken ring is embedded in the inner wall of the groove, and the whole piece is arranged on the inner wall of the convex ring 3123 compared with the larger area of the non-metallic lining , which is more convenient for installation and fixation.
  • the non-metallic lining can also be structured as shown in FIGS. 8-9 , that is, the non-metallic lining is integrally arranged on the inner wall of the convex ring, which is not limited here.
  • the non-metallic lining can also be fixed on the conductive rod, that is, the non-metallic lining only needs to be connected to the conductive rod or any part of the inner wall of the first through hole, the inner wall of the second through hole, or the inner wall of the convex ring. Just fix the connection.
  • the non-metal lining can be continuously arranged in the area where the conductive rod is in contact with other metal conductors, so that there is a gap between the conductive rod and other metal conductors, and the generation of metal particles can be reduced or even avoided without contact.
  • the non-metal lining 330 is a polytetrafluoroethylene lining.
  • the PTFE lining has good insulation and wear resistance, and also has good chemical corrosion resistance. During the operation of the wall bushing 300, if corrosive gas is generated due to the arc, the PTFE lining The lining can still keep its performance unaffected, to the greatest extent to ensure that the non-metallic lining 330 is not worn and continues to be effective during the operation of the wall bushing 300 .
  • the non-metallic lining may also be a polyester lining or a glass fiber lining Any of the inner linings with insulation and wear resistance.
  • the non-metal lining 330 is provided in the wall bushing 300 of this embodiment, the contact between the conductive rod 320 and other metal conductors can be reduced or avoided, the generation of metal particles can be reduced, and the reliability of the product operation can be improved.
  • connection terminal 440 and a wall bushing 400 including the connection terminal 440 are provided.
  • the connection terminal 440 of the wall bushing 400 sequentially includes a connection part 441 , an accommodating part 442 and a second connecting part 443 , and the accommodating part 442 is used for accommodating the end of the conductive rod 420 and electrically connected to the conductive rod 420 .
  • the second connecting portion 443 is sealedly connected with the upper end portion of the transition tank 411 .
  • the terminal 440 is an electrical connection component of the wall bushing 400, and is used for electrical connection with other devices.
  • the arrangement of the second connection portion 443 facilitates the fixed connection of the connection terminal 440 and the transition tank 411 .
  • a second sealing groove 414 is provided between the second connecting portion 443 of the terminal 440 and the upper end of the transition tank 411, and a second sealing ring (not shown in the figure) is provided in the second sealing groove 414, Specifically, the second sealing groove 414 is provided at the upper end of the transition tank 411 .
  • the second sealing groove may also be provided in the second connecting part, or both the second connecting part and the upper end of the transition tank are provided with a sealing groove, and a sealing ring is installed in the sealing groove.
  • the second connecting portion 443 is provided with a through hole 4431
  • the upper end of the transition tank 411 is correspondingly provided with a threaded hole
  • the second connecting portion 443 and the transition tank 411 use screws (not shown in the figure) to pass through the through hole 4431 Screw into the threaded hole above to make the connection.
  • the connection manner of the second connection portion and the transition tank may be adhesive bonding, welding, or a combination of the above fixed connection manners.
  • the end of the conductive rod 420 is provided with a spring contact finger 444 , the spring contact finger 444 abuts the inner wall of the accommodating part 442 , and the accommodating part 442 and the end of the conductive rod 420 are along the axis of the conductive rod 420 Gap 446 exists.
  • the spring contact finger 444 is in close contact with the inner wall of the accommodating portion 442 and the end of the conductive rod 420 at the same time, so that there is a stable electrical connection between the terminal 440 and the end of the conductive rod 420, and the head assembly can be kept equipotential, and Solve the problem of head heat.
  • the inner wall of the accommodating portion 442 is provided with a ring groove 445, and the ring groove 445 accommodates the spring contact finger 444.
  • the spring contact finger 444 abuts the inner wall of the ring groove 445 and the end of the conductive rod 420 to make the accommodating portion
  • the 442 is electrically connected to the end of the conductive rod 420 to maintain the equipotential potential of the head assembly and solve the problem of head heating.
  • the ring groove may not be provided in the accommodating portion, and there is a certain gap between the inner wall of the accommodating portion and the end of the conductive rod, and the spring contact finger can be pressed between the inner wall of the accommodating portion and the end of the conductive rod. During this time, the relatively fixed state of the spring contact fingers can also be maintained.
  • the wall bushing 400 of this embodiment due to the ingenious structure of the wiring terminal 440, satisfies the requirements that the head of the wall bushing 400 can be electrically connected and equipotential.
  • the conductive rod 420 has sufficient expansion and contraction space, that is, the deformation of the conductive rod 420 due to thermal expansion and cold contraction is absorbed, and the conductive rod 420 is prevented from being bent due to fixed connection or contact with the inner wall of the accommodating portion 442 .
  • the aforementioned terminal 440 is used in this embodiment, and a spring contact finger 444 is arranged between the terminal 440 and the conductive rod 420 , and the specific structure and connection method are the same as those described above, and will not be repeated here.
  • the convex ring 4123 of this embodiment is disposed on the upper surface of the transition plate 412 , and a protective cover 450 is disposed at the lower end of the head assembly around the second through hole 4121 .
  • the aforementioned terminal 440 is also applied in this embodiment, and a spring contact finger 444 is arranged between the terminal 440 and the conductive rod 420 , and the specific structure and connection method are the same as those described above. Repeat.
  • the convex ring 4123 of this embodiment is disposed on the upper surface of the transition plate 412 , and a protective bellows 450 is disposed at the lower end of the head assembly around the second through hole 4121 .
  • the wall bushing 500 includes a hollow insulator 570, the flange 571 of the hollow insulator 570 is sealedly connected to the lower surface of the transition plate 512, and the conductive rod 520 Through the hollow insulator 570 .
  • the hollow insulator 570 provides insulation protection for the inner conductor of the wall bushing 500 .
  • a third sealing groove 5711 is provided between the flange 571 of the hollow insulator 570 and the transition plate 512, and a third sealing ring (not shown in the figure) is provided in the third sealing groove 5711.
  • the flange A third sealing groove 5711 is provided on the 571 .
  • the third sealing groove may also be provided on the lower surface of the transition plate, or both the flange and the lower surface of the transition plate are provided with a sealing groove, and a sealing ring is installed in the sealing groove.
  • a pressure equalizing ball 580 is disposed on the outer periphery of the head assembly 510 , and the pressure equalizing ball 580 is fixedly connected with the head assembly 510 .
  • the function of the pressure equalizing ball 580 is to equalize the pressure to ensure that no abnormal corona discharge occurs when the head assembly 510 is charged.
  • the end of the wall bushing 500 is also provided with a pressure equalizing ball.
  • the conductive rod 520 is penetrated in the hollow insulator 570 and is fixedly connected with the end of the wall-penetrating sleeve 500, which ensures that the conductive rod 520 passes through the head assembly 510 in the case of thermal expansion and cold contraction.
  • the rod 520 is not displaced.
  • the overall structure of the wall bushing 500 is that the conductive rod 520 is penetrated in the hollow insulator 570 and is fixedly connected with the end of the wall bushing 500, and the conductive rod 520 only needs to pass through the head assembly 510 , due to the sealed connection between the terminal 540 and the transition tank 511, the conductive rod 520 and the transition tank 511 and between the conductive rod 520 and the transition plate 512 do not need to be fixed and sealed connection, which can avoid the transition tank 511 and the transition tank 511.
  • the axial dynamic sealing device is used between the conductive rods 520, which greatly improves the sealing reliability of the product, and at the same time, because the bellows is omitted, the production cost can be reduced.
  • the end of the conductive rod 520 is fixed, and an axial relative movement occurs between the head of the conductive rod 520 and the transition tank 511 .
  • the gap 546 provides a space for axial movement, and the conductive rod 520 will not bend due to the increase in length. From this aspect, the reliability of the product can also be improved.
  • the hollow insulator 570 is a composite insulator made of a composite material.
  • the composite insulator is light in weight, low in cost, and has excellent insulating properties and mechanical properties.
  • the hollow insulator may also be an insulator made of other materials, such as a porcelain insulator.
  • the hollow insulator 570 is a two-segment insulator, and an installation structure 572 is arranged between the two-segment insulators, and the installation structure 572 is used to install the through-wall sleeve 500 on the wall. That is to say, the structure of the wall bushing 500 includes the connecting terminal 540, the transition tank 511, the transition plate 512, and the hollow insulator 570 connected in sequence. For connection, the end of the conductive rod 520 is fixed to the end of the hollow insulator 570 .
  • the through-wall sleeve 500 When the through-wall sleeve 500 is installed, it can be installed at a certain angle of inclination or horizontally along its axial direction.
  • the wall bushing 500 is installed obliquely, and the head of the wall bushing 500 is higher than the end of the wall bushing 500.
  • the metal particles existing in the transition tank 511 will be affected by gravity. Falling into the annular groove 5112, the annular groove 5112 acts as a particle trap, adsorbing metal particles in the transition tank 511, preventing metal particles from floating and migrating in the transition tank 511, and ensuring stable electrical performance of the head of the wall bushing 500.
  • the wall bushing 500 also includes a hollow insulator 570 , the flange 571 of the hollow insulator 570 is sealed with the lower surface of the transition plate 512 , and the conductive rod 520 penetrates the hollow insulator 570 , and the hollow insulator 570 is a two-segment insulator, and a mounting structure 572 is arranged in the middle of the two-segment insulator.
  • the specific connection method is the same as the above, and will not be repeated.
  • the outer periphery of the head assembly 510 is also provided with a pressure equalizing ball 580, and the specific connection method will not be repeated here.
  • a space is formed at the lower end of the transition plate 512 to prevent possible metal chips or other debris from entering the main insulating cavity of the wall bushing 500, and the protective cover 550
  • the setting of the gap with the conductive rod 520 can prevent the secondary friction between the protective cover 550 and the conductive rod 520 from generating metal chips, and the protective cover 550 made of metal can also play a certain shielding effect, further improving the operation reliability of the product.
  • the wall bushing 500 also includes a hollow insulator 570, the flange 571 of the hollow insulator 570 is sealed with the lower surface of the transition plate 512, and the conductive rod 520 penetrates the hollow insulator 570, and the hollow insulator 570 is a two-segment insulator, and a mounting structure 572 is arranged in the middle of the two-segment insulator.
  • the specific connection method is the same as the above, and will not be repeated.
  • the outer periphery of the head assembly 510 is also provided with a pressure equalizing ball 580, and the specific connection method will not be repeated here.
  • a cavity formed by the protective bellows 550, the conductive rod 520, the transition plate 512 and the filter element 560 is formed, which only allows gas exchange.
  • the blocking of 560 cannot migrate to the outside of the protective bellows 550.
  • the protective bellows 550 In this structure, there are no other outlets and inlets, which can ensure that the metal particles inside the protective bellows 550 will not enter the wall sleeve during the process of inflating and deflating. Inside the hollow insulator 570 of the pipe 500, the reliability of the operation of the through-wall bushing 500 is ensured. In addition, since the protective bellows 550 and the conductive rod 520 are fixedly connected, there will be no displacement between the two. When the conductive rod 520 is deformed due to thermal expansion and contraction, the size of the protective bellows 550 also changes accordingly. , to ensure that the conductive rod 520 does not bend or the transition plate 512 does not deform, so the protective bellows 550 mainly utilizes its own elastic deformation to provide a deformation space for the conductive rod 520 .
  • the wall-penetrating sleeve of the invention has a simple structure, the head assembly replaces the structure of the traditional bellows, can avoid using an axial dynamic sealing device, greatly improves the sealing reliability of the product, and can reduce the production cost at the same time.
  • the arrangement of the protective cover or the protective bellows further prevents possible metal chips or other debris from entering the main insulating cavity of the wall bushing, thereby improving the reliability of product operation.

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  • Insulators (AREA)
  • Housings And Mounting Of Transformers (AREA)
  • Connector Housings Or Holding Contact Members (AREA)

Abstract

本发明公开一种穿墙套管，包括头部组件和导电杆以及密封罩设头部组件和导电杆的接线端子，接线端子与导电杆之间电连接，头部组件包括相互连接的过渡罐和过渡板；过渡罐的上端部设置第一通孔，过渡罐的下端部贯通；过渡板设置第二通孔，导电杆穿过第一通孔和第二通孔，过渡罐和过渡板固定连接使得过渡罐内环绕导电杆形成容纳腔，该穿墙套管结构简单，省去了波纹管的结构，可以避免采用轴向动密封装置，大大提高了产品密封可靠性，同时可以降低生产成本。

Description

穿墙套管 技术领域
本申请涉及输电绝缘设备技术领域，特别是涉及一种穿墙套管。
背景技术
直流输变电工程中，穿墙套管作为连接阀厅内外部的唯一电气元件，承载着整条线路的全电压和电流，其性能可靠性关系着整条线路的运行安全性与稳定性。
目前，现有的穿墙套管的头部组件多为波纹管，导电杆与波纹管采取轴向密封连接，导电杆穿过波纹管直接与外部部件进行电连接，具体而言，导电杆的一端与穿墙套管的末端固定在一起，导电杆的另一端与波纹管固定在一起并伸出波纹管外与外部部件进行电连接，具备弹性的波纹管向导电杆提供张紧力从而保持导电杆的张紧，在导电杆受热伸长时，波纹管能够发生弹性形变，使导电杆仍旧保持笔直的状态，不会发生应力弯曲，但是存在如下问题：穿墙套管的头部组件采用波纹管时，若采用轴向密封，由于长期热胀冷缩的摩擦作用，其动密封长期可靠性无法保证，产品容易漏气；若不采用轴向密封，则需要加装外部过渡罐，接线端子与导电杆之间需要采用软连接，通流能力受限；且波纹管本身价格较高，增加产品制造成本；导电杆与头部组件之间由于摩擦容易产生金属屑，导致内部放电。
发明内容
针对现有技术的不足，本发明的目的是提供一种穿墙套管，该穿墙套管结构简单，省去了波纹管的结构，可以避免采用轴向动密封装置，大大提高了产品密封可靠性，同时可以降低生产成本。
为实现上述发明目的，本发明所采用的技术手段如下：一种穿墙套管，包括头部组件和导电杆以及密封罩设头部组件和导电杆的接线端子，接线端子与导电杆之间电连接，头部组件包括相互连接的过渡罐和过渡板；过渡罐的上端部设置第一通孔，过渡罐的下端部贯通；过渡板设置第二通孔， 导电杆穿过第一通孔和第二通孔，过渡罐和过渡板固定连接使得过渡罐内环绕导电杆形成容纳腔。该穿墙套管结构简单，过渡罐的设置省去了波纹管的结构，可以避免采用轴向动密封装置，大大提高了产品密封可靠性，同时可以降低生产成本。
优选地，穿墙套管还包括防护罩，防护罩为上下贯通的环状壳体，防护罩围绕第二通孔安装在头部组件的下端部，导电杆穿过第一通孔、第二通孔和防护罩。防护罩的设置进一步防止可能产生的金属屑或者其它碎屑进入穿墙套管的主绝缘腔体内部，提高产品运行可靠性。
优选地，防护罩为金属材质，防护罩与导电杆之间设置间隙。可防止防护罩与导电杆之间的二次摩擦产生金属屑，金属材质的防护罩也可以起到一定的屏蔽作用，提高产品运行可靠性。
优选地，穿墙套管还包括防护波纹管，防护波纹管为上下贯通的环状壳体，防护波纹管分别设置上通孔和下通孔，导电杆穿过第一通孔、第二通孔、上通孔和下通孔，防护波纹管围绕上通孔设置上连接端，上连接端围绕第二通孔与头部组件的下端部固定连接，下通孔与导电杆固定连接。防护波纹管的设置进一步防止可能产生的金属屑或者其它碎屑进入穿墙套管的主绝缘腔体内部，提高产品运行可靠性。
优选地，上连接端为沿上通孔的径向延伸的法兰盘，法兰盘与头部组件的下端部贴合并固定连接。法兰盘与头部组件采用盘盘式的平面连接，安装方便，结构可靠。
优选地，在法兰盘上设置安装孔，安装孔与上通孔之间设置相互连通的通道，滤芯安装于安装孔中，且滤芯仅供防护波纹管内部与防护波纹管外部进行气体交换。穿墙套管在充放气过程中，只允许气体通过，内部的杂质和金属屑等无法通过滤芯进入主绝缘腔体内。
优选地，下通孔的直径小于防护波纹管的最小内径，围绕下通孔设置有下连接端，下连接端的两侧分别设置第一圆螺母和第二圆螺母，第一圆螺母和第二圆螺母分别与导电杆通过螺纹连接夹紧下连接端以使防护波纹管与导电杆固定连接。防护波纹管与导电杆固定连接，一方面，使防护波纹管与导电杆之间不存在间隙，保证防护波纹管里的杂质和金属屑不会 进入主绝缘腔体内；另一方面，导电杆在热胀冷缩的情况下发生形变，防护波纹管具备一定的弹性形变的空间，尺寸会随着导电杆的形变而相应发生改变，保证了穿墙套管各个部件之间稳定的连接关系。
优选地，过渡罐内环绕导电杆的侧壁设置若干环形槽。环形槽充当微粒捕捉陷阱，吸附过渡罐内金属微粒，保证穿墙套管的头部电气性能稳定。
优选地，过渡罐的下端部沿过渡罐的外周延伸出第一连接部，第一连接部与过渡板之间密封连接。第一连接部的设置便于将过渡罐与过渡板进行固定连接，密封连接可以保证过渡罐内不被潮气入侵，避免影响电气性能。
优选地，第一通孔的内壁和/或第二通孔的内壁设置非金属内衬。避免导电杆与过渡板、过渡罐之间摩擦产生金属屑，提高产品运行可靠性。
优选地，接线端子依次包括接线部、容置部和第二连接部，容置部用于容置导电杆的端部并与导电杆电连接，第二连接部与过渡罐的上端部密封连接。接线端子为穿墙套管的电连接组件，用于与其他设备进行电连接。第二连接部的设置便于将接线端子与过渡罐进行固定连接。
优选地，导电杆的端部设置弹簧触指，弹簧触指抵接容置部内壁，且容置部与导电杆的端部之间沿导电杆的轴向存在间隙。弹簧触指同时与接线端子和导电杆的端部紧密接触，使得接线端子与导电杆的端部之间具有稳定的电连接，可以保持头部组件等电位，以及解决头部发热问题。容置部与导电杆的端部之间沿导电杆的轴向存在间隙，可以吸收导电杆热胀冷缩的形变，避免导电杆因固定连接产生弯曲。
优选地，过渡板的下表面围绕第二通孔设置凸环。凸环的设置增加了导电杆支撑面积，可以提高导电杆的抗弯性能。
优选地，穿墙套管还包括空心绝缘子，空心绝缘子的法兰与过渡板的下表面密封连接，导电杆贯穿空心绝缘子。空心绝缘子为穿墙套管的内部导体提供绝缘保护。
附图说明
图1是本发明一实施例的穿墙套管100的局部剖视图；
图2是本发明另一实施例的穿墙套管100的局部剖视图；
图3是本发明一实施例的穿墙套管200的局部剖视图；
图4是本发明另一实施例的穿墙套管200的局部剖视图；
图5是本发明又一实施例的穿墙套管200的局部剖视图；
图6是本发明一实施例的防护波纹管250的立体示意图；
图7是本发明一实施例的滤芯260的整体剖视图；
图8是本发明一实施例的穿墙套管300的局部剖视图；
图9是本发明另一实施例的穿墙套管300的局部剖视图；
图10是本发明又一实施例的穿墙套管300的局部剖视图；
图11是本发明一实施例的穿墙套管400的局部剖视图；
图12是本发明一实施例的接线端子440的剖视图；
图13是本发明另一实施例的穿墙套管400的局部剖视图；
图14是本发明又一实施例的穿墙套管400的局部剖视图；
图15是本发明一实施例的穿墙套管500的局部剖视图；
图16是本发明一实施例的穿墙套管500的整体剖视图；
图17是本发明另一实施例的穿墙套管500的局部剖视图；
图18是本发明另一实施例的穿墙套管500的整体剖视图；
图19是本发明又一实施例的穿墙套管500的局部剖视图；
图20是本发明又一实施例的穿墙套管500的整体剖视图。
具体实施方式
根据要求，这里将披露本发明的具体实施方式。然而，应当理解的是，这里所披露的实施方式仅仅是本发明的典型例子而已，其可体现为各种形式。因此，这里披露的具体细节不被认为是限制性的，而仅仅是作为权利要求的基础以及作为用于教导本领域技术人员以实际中任何恰当的方式不同地应用本发明的代表性的基础，包括采用这里所披露的各种特征并结合这里可能没有明确披露的特征。
在一实施例中，如图1所示，穿墙套管100包括头部组件110和导电杆120以及密封罩设头部组件110和导电杆120的接线端子140(图中仅为示意)，接线端子140与导电杆120之间电连接，头部组件110包括相互连接的过渡罐111和过渡板112；过渡罐111的上端部设置第一通孔 1111，过渡罐111的下端部贯通；过渡板112设置第二通孔1121，导电杆120穿过第一通孔1111和第二通孔1121，过渡罐111和过渡板112固定连接使得过渡罐111内环绕导电杆120形成容纳腔113。该穿墙套管100结构简单，核心部件是过渡罐111和过渡板112，过渡罐111的设置省去了波纹管的结构，只要能够保证过渡罐111密封设置，即在过渡罐111的外部施加密封措施，可以避免过渡罐111和导电杆120之间采用轴向动密封装置，大大提高了产品密封可靠性，同时可以降低生产成本。特别值得注意的是，密封罩设头部组件110和导电杆120的接线端子140，只要满足与导电杆120之间电连接即可，电连接的方式可以是直接接触，也可以是内部进行导体连接，在此对接线端子140的形状构造不作具体的限制。
需要说明的是，本实施例中，头部组件110的上端部和下端部是相对位置的概念，沿着穿墙套管100整体结构的轴线方向，以靠近头部组件110的一端为上，以远离头部组件110的方向为下。在其他实施例中，对于“上”和“下”的定义，也依据此标准。
以及，在其他实施例中，头部组件可以为一体成型的腔体结构，只要满足硬性组件的要求即可，即在受外界热量条件的干扰下，头部组件不会发生形变和位移。这就保证了头部组件不会因为导电杆的长度变化发生形变和位移，进而保持穿墙套管整体结构的稳定性。
在本实施例中，过渡板112为平面板。在其他实施例中，过渡板的形状不作具体的限制。
在本实施例中，过渡罐111为圆柱状罐，上端部设置第一通孔1111，下端部贯通形成圆柱状空腔，第一通孔1111与圆柱状空腔连通。过渡罐111与过渡板112固定连接且将导电杆120穿设在第一通孔1111和第二通孔1121中后，环绕在导电杆120外的圆环状空腔形成容纳腔113。
在其他实施例中，过渡罐的形状也可以为非圆柱状，只要能够适配于所连接的部件即可。
在本实施例中，过渡罐111内环绕导电杆120的侧壁设置若干环形槽1112。环形槽1112充当微粒捕捉陷阱，吸附过渡罐111内的金属微粒，保证穿墙套管100的头部电气性能稳定。
在本实施例中，环形槽1112的个数为四个。在其他实施例中，环形槽的个数不受限制，具体个数根据过渡罐内壁的尺寸大小进行合理设计。但是，可以理解的是，环形槽的数量越多越密集，吸附金属微粒的效果越好。
在本实施例中，环形槽1112的形状为矩形槽，在其他实施例中，环形槽也可以为弧形槽或者不规则形状的槽，在此不对形状作具体限制。
在本实施例中，过渡罐111的下端部沿过渡罐111的外周延伸出第一连接部1114，第一连接部1114与过渡板112之间密封连接。第一连接部1114的设置便于将过渡罐111与过渡板112进行固定连接，密封连接可以保证过渡罐111内不被潮气入侵，避免影响电气性能。
在本实施例中，过渡板112上设置第一密封槽1122，第一密封槽内设置第一密封圈(图中未示出)。在其他实施例中，第一密封槽也可以设置在第一连接部上，或者第一连接部和过渡板上都开设密封槽，装设密封圈。
在本实施例中，第一连接部1114与过渡板112设置对应的通孔，采用螺栓连接(图中未示出)的方式进行固定连接。在其他实施例中，第一连接部与过渡板的连接方式可以为胶接、焊接或者以上几种固定连接方式的组合。
在本实施例中，导电杆120位于过渡罐111及以上的部分为实心结构，导电杆120位于过渡罐111以下的部分为空心结构。导电杆120的实心结构部分可以具备良好的导电性，导电杆120的空心结构部分可以降低导电杆的重量，从而降低穿墙套管100整体的重量，且可以降低成本。
在其他实施例中，导电杆可以为全实心结构，或者全空心结构，导电杆位于过渡罐及以上的部分，空心导电杆可以设置较大的壁厚。
本实施例的穿墙套管100结构简单，核心部件是过渡罐111和过渡板112，过渡罐111的设置省去了波纹管的结构，只要能够保证过渡罐111密封设置，即在过渡罐111的外部施加密封措施，可以避免过渡罐111和导电杆120之间采用轴向动密封装置，大大提高了产品密封可靠性，同时可以降低生产成本。
在一应用场景中，如图2所示，穿墙套管100还包括防护罩150，防 护罩150为上下贯通的环状壳体152，防护罩150围绕第二通孔1121安装在头部组件110的下端部，导电杆120穿过第一通孔1111、第二通孔1121和防护罩150，接线端子140与导电杆120电连接并密封罩设头部组件110和导电杆120。防护罩150的设置进一步防止可能产生的金属屑或者其它碎屑进入穿墙套管100的主绝缘腔体内部，提高产品运行可靠性。
在本实施例中，防护罩150为金属材质，防护罩150与导电杆120之间设置间隙。间隙的设置可防止防护罩150与导电杆120之间的二次摩擦产生金属屑，金属材质的防护罩150也可以起到一定的屏蔽作用，提高产品运行可靠性。
在其他实施例中，防护罩也可以为非金属材质，只要能够确保防护罩与导电杆之间不会因为二次摩擦产生金属屑即可。
在本实施例中，防护罩150的下端部靠近导电杆120的一侧形成卷边151，卷边151与导电杆120之间存在间隙。卷边151的设置能够使得金属屑残留在卷边151内，同时卷边151不会与导电杆120产生锐利的摩擦，不会因意外接触产生更多不必要的金属屑。
在本实施例中，防护罩150的上端部围绕防护罩150的环状壳体152的外周向外延伸出环状的罩体连接部153，罩体连接部153与头部组件110的下端部贴合，在头部组件110的下端部设置螺纹孔，在罩体连接部153上设置与上述螺纹孔对应的通孔，罩体连接部153与头部组件110的下端部采用螺栓连接的方式进行固定。
在其他实施例中，也可以在罩体连接部设置螺纹孔，在头部组件的下端部设置与上述螺纹孔对应的通孔，罩体连接部与头部组件的下端部同样采用螺栓连接的方式进行固定。需要注意的是，由于导电杆与头部组件之间并不存在固定连接，螺栓连接的通孔和螺纹孔的设置方式并不会影响穿墙套管的装配顺序。
在本实施例中，防护罩150为圆环形壳体，在其他实施例中，环状壳体的形状也可以设置为其他形状，比如可以为方形环、椭圆环等其他形状，并不局限于圆形环。
在其他实施例中，罩体连接部与头部组件的下端部之间的连接方式， 也可以采用胶接、焊接等方式，只要能够保证二者之间的有效连接即可。
在另一实施例中，如图3所示，提供一种穿墙套管200，过渡板212的下表面2122围绕第二通孔2121设置凸环2123。凸环2123的设置增加了对导电杆220的支撑面积，可以提高导电杆220的抗弯性能。
在又一实施例中，凸环2123也可以设置在过渡板212的上表面，如图4所示，过渡板212的上表面2124围绕第二通孔2121设置凸环2123。凸环2123的设置增加了对导电杆220的支撑面积，可以提高导电杆220的抗弯性能。
在本实施例中，凸环2123设置在头部组件的容纳腔213内，并且其高度不会超过过渡罐211的高度，也即凸环2123的上端面与过渡罐211的内壁之间存在间隙，并不直接接触，可以保证在热量作用下，即使凸环2123发生膨胀性的形变，也不会与过渡罐211的内壁接触，更不会使过渡罐211发生形变，保证了穿墙套管200的整体结构的可靠性。
其中，穿墙套管200还包括防护罩250，防护罩250的材质、结构等与前述防护罩150一致，不再赘述。
当然，在其他实施例中，还可以在过渡板的上表面和下表面都设置凸环，本质都是为了扩大导电杆与过渡板的接触面积，进而增加对导电杆的支撑面积，提高导电杆的抗弯性能。
本实施例的穿墙套管200由于设置凸环2123，可以提高导电杆220的抗弯性能，进而提高产品整体的可靠性。
进一步地，在另一应用场景中，如图5-图7所示，穿墙套管200包括防护波纹管250，代替前述的防护罩250。具体地，防护波纹管250为上下贯通的环状壳体，防护波纹管250分别设置上通孔251和下通孔252，导电杆220穿过第一通孔2111、第二通孔2121、上通孔251和下通孔252，防护波纹管250围绕上通孔251设置上连接端253，上连接端253围绕第二通孔2121与头部组件210的下端部固定连接，下通孔252与导电杆220固定连接，接线端子240与导电杆220电连接并密封罩设头部组件210和导电杆220。该穿墙套管200结构简单，头部组件210替代传统的波纹管结构，可以避免采用轴向动密封装置，大大提高了产品密封可靠性，同时 可以降低生产成本；防护波纹管250的设置进一步防止可能产生的金属屑或者其它碎屑进入穿墙套管200的主绝缘腔体内部，提高产品运行可靠性。
在本实施例中，防护波纹管250为圆环形壳体，在其他实施例中，防护波纹管的环状壳体的形状也可以设置为其他形状，比如可以为方形环、椭圆环等其他形状，并不局限于圆形环。
在本实施例中，上连接端253为沿上通孔251的径向向外延伸的法兰盘253，法兰盘253与头部组件210的下端部贴合并固定连接。法兰盘253与头部组件210采用盘盘式的平面连接，安装方便，结构可靠。
在其他实施例，上连接端的结构不局限于此，比如可以为沿着上通孔延伸出的圆环结构或者锯齿结构，头部组件的下端部设置与之配合的凹槽进行插接，辅助以胶黏剂固定。
在本实施例中，在法兰盘253上设置安装孔2531，安装孔2531与上通孔251之间设置相互连通的通道2532，滤芯260安装于安装孔2531中，且滤芯260仅供防护波纹管250内部与防护波纹管250外部进行气体交换。穿墙套管200在充放气过程中，滤芯260只允许气体通过，内部的杂质和金属屑等无法通过滤芯260进入主绝缘腔体内。
在本实施例中，安装孔2531的数量为三个，相对应的滤芯260的数量也为三个。在其他实施例中，安装孔和滤芯的数量只要相等即可，具体数量以及不同安装孔之间的距离都不作具体限制。
在本实施例中，安装孔2531为通孔，通道2532设置在法兰盘253的表面，为连通安装孔2531和上通孔251的直线凹槽。通道2532为防护波纹管250内部与防护波纹管250外部进行气体交换的通道。
在其他实施例中，安装孔可以不是通孔，在安装孔的底端与上通孔之间设置通道，通道设置在法兰盘的内部，从法兰盘的表面并不能观察到。总而言之，通道的形状和设置位置并不受限制，只要能够达到使防护波纹管内部与防护波纹管外部进行气体交换的目的即可。
在本实施例中，滤芯260包括过滤部261和滤芯连接部262。其中，过滤部261为柱状的金属烧结网，过滤部261的侧面2611和顶面2612为一体设计，无缝连接，过滤部261的底面2613上设置通孔2614，围绕通 孔2614设置滤芯连接部262，滤芯连接部262为上下贯通的柱体结构，一端与通孔2614相连，一端为出口，滤芯连接部262上设置螺纹2621。安装孔2531设置与螺纹2621配合的螺纹，当滤芯连接部262安装在安装孔2531里时，滤芯260裸露在外的部分为一体设计，无缝连接。
在本实施例中，滤芯260为金属网状结构的钛棒滤芯260，钛棒滤芯260是一种以工业高纯钛为原料，经分筛、冷却等静压成型后，再经高温高真空烧结而成的多孔过滤元件，具有耐腐蚀、耐高温、强度大、过滤精度容易保证、易再生等优异性能。
在本实施例中，钛棒滤芯260具备以下的产品特点：结构均匀、孔径分布窄、分离效率高；孔隙率高、过滤阻力小、渗透效率高；耐高温，一般可以在280℃以下正常使用；化学稳定性好、耐酸碱腐蚀，具有抗氧化性能；无微粒脱落；机械性能好，操作简单。
在其他实施例中，滤芯也可以为其他耐腐蚀、耐高温、强度大、过滤精度容易保证的烧结网材料，比如聚四氟乙烯、不锈钢等材料。
在本实施例中，下通孔252的直径小于防护波纹管250的最小内径，围绕下通孔252设置有下连接端254，下连接端254的两侧分别设置第一圆螺母256和第二圆螺母257，第一圆螺母256和第二圆螺母257分别与导电杆220通过螺纹连接夹紧下连接端254以使防护波纹管250与导电杆220固定连接。防护波纹管250与导电杆220固定连接，一方面使防护波纹管250与导电杆220之间不存在间隙，保证防护波纹管250里的杂质和金属屑不会进入主绝缘腔体内；另一方面，导电杆220在热胀冷缩的情况下发生形变，防护波纹管250具备一定的弹性形变的空间，尺寸会随着导电杆220的形变而相应发生改变，保证了穿墙套管200各个部件之间稳定的连接关系。
在其他实施例中，防护波纹管与导电杆固定连接可以为焊接、胶接等其他固定连接方式，并且二者之间的固定连接对密封没有要求。
在本实施例中，防护波纹管250为金属材质，金属材质的防护波纹管250也可以起到一定的屏蔽作用，提高产品运行可靠性。
在其他实施例中，防护波纹管也可以为非金属材质，只要能够确保防 护波纹管与导电杆之间不会因为二次摩擦产生金属屑即可。
可以理解的是，在本实施例中，由于防护波纹管250的设置，形成了一个由防护波纹管250、导电杆220、过渡板212和滤芯260共同构成的只允许进行气体交换的空腔，防护波纹管250和导电杆220之间不存在间隙，在不密封的条件下，也只能允许气体通过；防护波纹管250和过渡板212之间设置通道2532和滤芯260，防护波纹管250内部的金属微粒会受到滤芯260的阻挡，无法迁移到防护波纹管250的外部，在此结构中，并无其他出口和入口，可以保证防护波纹管250内部的金属微粒在充放气的过程中，不会进入穿墙套管200的主绝缘腔体内，保证了穿墙套管200运行的可靠性。并且，由于防护波纹管250和导电杆220之间属于固定连接，二者之间不会发生位移，在导电杆220因热胀冷缩发生形变时，防护波纹管250的尺寸也随之发生变化，以保证导电杆220不会发生弯曲现象或者过渡板212不会发生形变的现象，所以采用防护波纹管250主要利用其自身的弹性形变为导电杆220提供发生形变的空间。
在本实施例中，法兰盘253与过渡板212贴合的一面设置螺纹孔，过渡板212上设置与螺纹孔对应的通孔，法兰盘253与过渡板212通过螺栓进行螺纹连接。法兰盘253上与过渡板212贴合的一面设置螺纹孔，而不是在过渡板212上设置螺纹孔，是考虑到了装配的原因，此结构更加便于装配。在本实施例中，导电杆220位于过渡板212下方的区域设置螺纹，穿墙套管200的装配顺序为其他部件装配完成后，将第二圆螺母257从导电杆220的头部套设而下，拧装在导电杆220的螺纹区域的下边缘位置，防止因为震动等原因发生螺母松动的现象，再将装配好滤芯260的防护波纹管250从导电杆220的头部套设而下，上通孔251在上，下通孔252在下，下连接端254抵接第二圆螺母257，再将第一圆螺母256从导电杆220的头部套设而下，拧装在导电杆220上，并使第一圆螺母256抵接下连接端254，即用第一圆螺母256和第二圆螺母257夹紧在下连接端254的两侧从而将防护波纹管250固定在导电杆220上，然后将过渡板212从导电杆220的头部套设而下，将过渡板212上的通孔与法兰盘253上的螺纹孔对应，通过采用螺栓穿过通孔拧入螺纹孔，将过渡板212与法兰盘253固 定连接；再将过渡罐211从导电杆220的头部套设而下，与过渡板212固定连接；最后将接线端子240与过渡罐211固定连接，完成后续装配。在此过程中，由于导电杆220主体以及末端部分都封闭在主绝缘腔体内，螺栓若先穿过法兰盘253，再穿过过渡板212，进行螺栓连接存在着现实操作的障碍。因此，本实施例中的连接结构更加便于装配。
进一步地，在一实施例中，如图8-图10所示，穿墙套管300增加了非金属内衬330的结构。
在一应用场景中，如图8所示，第一通孔3111的内壁和第二通孔3121的内壁设置非金属内衬330，避免导电杆320与过渡板312、过渡罐311之间摩擦产生金属微粒，提高产品运行可靠性。
在其他实施例中，也可以只在第一通孔的内壁或者第二通孔的内壁设置非金属内衬。
在本实施例中，凸环3123的内壁也设置了非金属内衬330，其中，凸环3123设置在过渡板312的下表面。在其他实施例中，非金属内衬可以连续设置在导电杆与其他金属导体接触的区域，也可以分段设置，让导电杆与其他金属导体之间存在间隙，不接触就可以减少甚至避免金属微粒的产生。
在另一应用场景中，如图9所示，第一通孔3111的内壁、第二通孔3121的内壁和凸环3123的内壁设置非金属内衬330，具体与前述一致，不再赘述。在本实施例中，凸环3123设置在过渡板312的上表面。
在又一应用场景中，如图10所示，凸环3123的内壁设置非金属内衬330。非金属内衬330避免导电杆320与过渡板312、过渡罐311之间摩擦产生金属屑，提高产品运行可靠性。其中，凸环3123的内壁设置若干凹槽，非金属内衬330嵌入凹槽内。此结构可采用断圈形式将非金属内衬330嵌入凹槽内，即非金属内衬330为条状结构，并非整圈结构，可根据凹槽的尺寸调整非金属内衬330的长度，使其嵌入到凹槽中，方便安装施工。另外设置凹槽可以减少非金属内衬330的用量，降低生产成本；断圈形式的非金属内衬330嵌入凹槽内壁相比于较大面积的非金属内衬整片设置于凸环3123内壁，更便于安装固定，在使用的过程中，不会出现非金属内 衬330在凸环3123内壁发生位移的情况。当然，为了便于安装，非金属内衬也可以如图8-图9的结构，即非金属内衬是整片设置于凸环的内壁，在此不作限制。
在其他实施例中，非金属内衬也可以固定设置在导电杆上，即非金属内衬只要与导电杆或者第一通孔的内壁、第二通孔的内壁、凸环的内壁任一部件固定连接即可。或者，非金属内衬可以连续设置在导电杆与其他金属导体接触的区域，让导电杆与其他金属导体之间存在间隙，不接触就可以减少甚至避免金属微粒的产生。
在本实施例中，非金属内衬330为聚四氟乙烯内衬。聚四氟乙烯内衬具备良好的绝缘和耐磨性能，还具备良好的耐化学腐蚀的性能，在穿墙套管300运行的过程中，若因电弧产生了腐蚀性气体，聚四氟乙烯内衬仍旧可以保持其性能不受影响，最大程度保证非金属内衬330在穿墙套管300的运行过程中不被磨损且持续有效。
在其他实施例中，若穿墙套管中填充的绝缘气体经过电弧产生的气体为非腐蚀性气体或者腐蚀性不强的气体，非金属内衬也可以为聚酯内衬或者玻纤内衬等具备绝缘和耐磨性能的内衬中的任一种。
本实施例的穿墙套管300由于设置了非金属内衬330，可以减少或者避免导电杆320与其他金属导体之间的接触，降低金属微粒的产生，提高产品运行的可靠性。
进一步地，在一实施例中，如图11-图12所示，提供一种接线端子440及包括接线端子440的穿墙套管400。具体地，穿墙套管400的接线端子440依次包括接线部441、容置部442和第二连接部443，容置部442用于容置导电杆420的端部并与导电杆420电连接，第二连接部443与过渡罐411的上端部密封连接。接线端子440为穿墙套管400的电连接组件，用于与其他设备进行电连接。第二连接部443的设置便于将接线端子440与过渡罐411进行固定连接。
在本实施例中，接线端子440的第二连接部443与过渡罐411的上端部之间设置第二密封槽414，第二密封槽414内设置第二密封圈(图中未示出)，具体地，第二密封槽414设置在过渡罐411的上端部。在其他实 施例中，第二密封槽也可以设置在第二连接部，或者第二连接部和过渡罐的上端部都设置密封槽，密封槽内装设密封圈。
在本实施例中，第二连接部443设置通孔4431，过渡罐411的上端部对应设置螺纹孔，第二连接部443与过渡罐411采用螺钉(图中未示出)穿过通孔4431拧入上述螺纹孔中实现连接。在其他实施例中，第二连接部与过渡罐的连接方式可以为胶接、焊接或者以上几种固定连接方式的组合。
在本实施例中，导电杆420的端部设置弹簧触指444，弹簧触指444抵接容置部442内壁，且容置部442与导电杆420的端部之间沿导电杆420的轴向存在间隙446。弹簧触指444同时与容置部442的内壁和导电杆420的端部紧密接触，使得接线端子440与导电杆420的端部之间具有稳定的电连接，可以保持头部组件等电位，以及解决头部发热问题。容置部442与导电杆420的端部之间沿导电杆的轴向存在间隙446，可以在导电杆420发生热胀冷缩的轴向形变时，保证导电杆420具备充分的伸缩空间，即可以吸收导电杆420热胀冷缩的形变，避免导电杆420因固定连接或者与容置部442的内壁接触而发生弯曲现象。
在本实施例中，容置部442内壁设置环槽445，环槽445内容置弹簧触指444，弹簧触指444通过抵接环槽445的内壁和导电杆420的端部，使容置部442与导电杆420的端部电连接，保持头部组件等电位，以及解决头部发热问题。在其他实施例中，容置部内可以不设置环槽，容置部内壁与导电杆的端部之间存在一定的间隙，可以将弹簧触指压在容置部内壁与导电杆的端部之间，也可以保持弹簧触指相对固定的状态。
本实施例的穿墙套管400，由于接线端子440的结构设置巧妙，满足了穿墙套管400的头部能够电连接以及等电位的要求，同时可以在导电杆420发生热胀冷缩的轴向形变时，保证导电杆420具备充分的伸缩空间，即吸收导电杆420热胀冷缩的形变，避免导电杆420因固定连接或者与容置部442的内壁接触而发生弯曲现象。
在一应用场景中，如图13所示，本实施例应用了前述的接线端子440，接线端子440和导电杆420之间设置弹簧触指444，具体结构和连接 方式与前述一致，不再赘述。本实施例的凸环4123设置在过渡板412的上表面，且围绕第二通孔4121在头部组件的下端部设置了防护罩450。
在又一应用场景中，如图14所示，本实施例也应用了前述的接线端子440，接线端子440和导电杆420之间设置弹簧触指444，具体结构和连接方式与前述一致，不再赘述。本实施例的凸环4123设置在过渡板412的上表面，且围绕第二通孔4121在头部组件的下端部设置了防护波纹管450。
进一步地，本申请还提供一实施例，如图15-图16所示，穿墙套管500包括空心绝缘子570，空心绝缘子570的法兰571与过渡板512的下表面密封连接，导电杆520贯穿空心绝缘子570。空心绝缘子570为穿墙套管500的内部导体提供绝缘保护。
在本实施例中，空心绝缘子570的法兰571与过渡板512之间设置第三密封槽5711，第三密封槽5711内设置第三密封圈(图中未示出)，具体地，法兰571上设置第三密封槽5711。在其他实施例中，第三密封槽也可以设置在过渡板的下表面，或者法兰和过渡板的下表面都设置密封槽，密封槽内装设密封圈。
在本实施例中，头部组件510的外周设置均压球580，均压球580与头部组件510固定连接。均压球580的作用为均压，保证头部组件510在带电的情况下不发生异常的电晕放电。穿墙套管500的末端也同样设置均压球。
在本实施例中，导电杆520穿设在空心绝缘子570中并与穿墙套管500的末端固定连接，保证了导电杆520在发生热胀冷缩的情况下，穿过头部组件510的导电杆520不会发生位移。
在本实施例中，具体地，穿墙套管500的整体结构为导电杆520穿设在空心绝缘子570中并与穿墙套管500的末端固定连接，导电杆520只需要穿过头部组件510，由于接线端子540与过渡罐511之间密封连接，从而使得导电杆520与过渡罐511之间、导电杆520与过渡板512之间并不需要固定和密封连接，即可以避免过渡罐511和导电杆520之间采用轴向动密封装置，大大提高了产品密封可靠性，同时由于免去设置波纹管， 可以降低生产成本。并且当导电杆520由于热胀冷缩发生长度改变时，导电杆520末端固定，导电杆520头部与过渡罐511之间会发生轴向的相对运动，此时由于接线端子540与导电杆520的端部之间存在间隙546，间隙546提供了轴向运动的空间，导电杆520不会因为长度增加而发生弯曲的现象，从此方面来看也可以提高产品的可靠性。
在本实施例中，空心绝缘子570为复合材料制备的复合绝缘子，复合绝缘子的质量轻，成本低，并且具备优良的绝缘性能和力学性能。在其他实施例中，空心绝缘子也可以为瓷绝缘子等由其他材料制备而成的绝缘子。
在本实施例中，空心绝缘子570为两段绝缘子，两段绝缘子中间设置安装结构572，安装结构572用于将穿墙套管500安装在墙壁上。也即穿墙套管500的结构包括依次连接的接线端子540、过渡罐511、过渡板512、空心绝缘子570，导电杆520穿设在空心绝缘子570中，导电杆520的端部与接线端子540连接，导电杆520的末端固定在空心绝缘子570的末端。
穿墙套管500在安装时，可以存在一定的倾斜角度或者沿其轴向水平安装。在本实施例中，穿墙套管500倾斜安装，穿墙套管500的头部高于穿墙套管500的末端，在此情况下，过渡罐511内存在的金属微粒会由于重力作用，落入环形槽5112中，环形槽5112充当微粒捕捉陷阱，吸附过渡罐511内的金属微粒，避免金属微粒在过渡罐511内漂浮迁移，保证穿墙套管500的头部电气性能稳定。
在一应用场景中，如图17-图18所示，穿墙套管500也包括空心绝缘子570，空心绝缘子570的法兰571与过渡板512的下表面密封连接，导电杆520贯穿空心绝缘子570，且空心绝缘子570为两段绝缘子，两段绝缘子中间设置安装结构572，具体连接方式与前述一致，不再赘述。头部组件510的外周也设置均压球580，具体连接方式也不再赘述。
在本实施例中，由于防护罩550的设置，在过渡板512的下端形成一个空间，防止可能产生的金属屑或者其它碎屑进入穿墙套管500的主绝缘腔体内部，以及防护罩550与导电杆520之间的间隙设置可防止防护罩 550与导电杆520之间的二次摩擦产生金属屑，金属材质的防护罩550也可以起到一定的屏蔽作用，进一步提高产品运行可靠性。
在另一应用场景中，如图19-图20所示，穿墙套管500也包括空心绝缘子570，空心绝缘子570的法兰571与过渡板512的下表面密封连接，导电杆520贯穿空心绝缘子570，且空心绝缘子570为两段绝缘子，两段绝缘子中间设置安装结构572，具体连接方式与前述一致，不再赘述。头部组件510的外周也设置均压球580，具体连接方式也不再赘述。
在本实施例中，由于防护波纹管550的设置，形成了一个由防护波纹管550、导电杆520、过渡板512和滤芯560共同构成的只允许进行气体交换的空腔，防护波纹管550和导电杆520之间不存在间隙，在不密封的条件下，也只能允许气体通过；防护波纹管550和过渡板512之间设置通道和滤芯560，防护波纹管550内部的金属微粒会受到滤芯560的阻挡，无法迁移到防护波纹管550的外部，在此结构中，并无其他出口和入口，可以保证防护波纹管550内部的金属微粒在充放气的过程中，不会进入穿墙套管500的空心绝缘子570内，保证了穿墙套管500运行的可靠性。并且，由于防护波纹管550和导电杆520之间属于固定连接，二者之间不会发生位移，在导电杆520因热胀冷缩发生形变时，防护波纹管550的尺寸也随之发生变化，以保证导电杆520不会发生弯曲现象或者过渡板512不会发生形变的现象，所以采用防护波纹管550主要利用其自身的弹性形变为导电杆520提供发生形变的空间。
本发明的穿墙套管结构简单，头部组件替代了传统波纹管的结构，可以避免采用轴向动密封装置，大大提高了产品密封可靠性，同时可以降低生产成本。防护罩或者防护波纹管的设置进一步防止可能产生的金属屑或者其它碎屑进入穿墙套管的主绝缘腔体内部，提高产品运行可靠性。
本发明的技术内容及技术特点已揭示如上，然而可以理解，在本发明的创作思想下，本领域的技术人员可以对上述结构和材料作各种变化和改进，包括这里单独披露或要求保护的技术特征的组合，明显地包括这些特征的其它组合。这些变形和/或组合均落入本发明所涉及的技术领域内，并落入本发明权利要求的保护范围。

Claims (14)

  1. 一种穿墙套管，其特征在于：包括头部组件和导电杆以及密封罩设所述头部组件和所述导电杆的接线端子，所述接线端子与所述导电杆之间电连接，所述头部组件包括相互连接的过渡罐和过渡板；
    所述过渡罐的上端部设置第一通孔，所述过渡罐的下端部贯通；
    所述过渡板设置第二通孔，所述导电杆穿过所述第一通孔和所述第二通孔，所述过渡罐和所述过渡板固定连接使得所述过渡罐内环绕所述导电杆形成容纳腔。
  2. 如权利要求1所述的穿墙套管，其特征在于：所述穿墙套管还包括防护罩，所述防护罩为上下贯通的环状壳体，所述防护罩围绕所述第二通孔安装在所述头部组件的下端部，所述导电杆穿过所述第一通孔、所述第二通孔和所述防护罩。
  3. 如权利要求2所述的穿墙套管，其特征在于：所述防护罩为金属材质，所述防护罩与所述导电杆之间设置间隙。
  4. 如权利要求1所述的穿墙套管，其特征在于：所述穿墙套管还包括防护波纹管，所述防护波纹管为上下贯通的环状壳体，所述防护波纹管分别设置上通孔和下通孔，所述导电杆穿过所述第一通孔、所述第二通孔、所述上通孔和所述下通孔，所述防护波纹管围绕所述上通孔设置上连接端，所述上连接端围绕所述第二通孔与所述头部组件的下端部固定连接，所述下通孔与所述导电杆固定连接。
  5. 如权利要求4所述的穿墙套管，其特征在于：所述上连接端为沿所述上通孔的径向延伸的法兰盘，所述法兰盘与所述头部组件的所述下端部贴合并固定连接。
  6. 如权利要求5所述的穿墙套管，其特征在于：在所述法兰盘上设置安装孔，所述安装孔与所述上通孔之间设置相互连通的通道，滤芯安装于所述安装孔中，且所述滤芯仅供所述防护波纹管内部与所述防护波纹 管外部进行气体交换。
  7. 如权利要求4所述的穿墙套管，其特征在于：所述下通孔的直径小于所述防护波纹管的最小内径，围绕所述下通孔设置有下连接端，所述下连接端的两侧分别设置第一圆螺母和第二圆螺母，所述第一圆螺母和所述第二圆螺母分别与所述导电杆通过螺纹连接夹紧所述下连接端以使所述防护波纹管与所述导电杆固定连接。
  8. 如权利要求1所述的穿墙套管，其特征在于：所述过渡罐内环绕所述导电杆的侧壁设置若干环形槽。
  9. 如权利要求1所述的穿墙套管，其特征在于：所述过渡罐的所述下端部沿所述过渡罐的外周延伸出第一连接部，所述第一连接部与所述过渡板之间密封连接。
  10. 如权利要求1所述的穿墙套管，其特征在于：所述第一通孔的内壁和/或所述第二通孔的内壁设置非金属内衬。
  11. 如权利要求1所述的穿墙套管，其特征在于：所述接线端子依次包括接线部、容置部和第二连接部，所述容置部用于容置所述导电杆的端部并与所述导电杆电连接，所述第二连接部与所述过渡罐的所述上端部密封连接。
  12. 如权利要求11所述的穿墙套管，其特征在于：所述导电杆的端部设置弹簧触指，所述弹簧触指抵接所述容置部内壁，且所述容置部与所述导电杆的端部之间沿所述导电杆的轴向存在间隙。
  13. 如权利要求1所述的穿墙套管，其特征在于：所述过渡板的上表面和/或下表面围绕所述第二通孔设置凸环。
  14. 如权利要求1所述的穿墙套管，其特征在于：所述穿墙套管还包括空心绝缘子，所述空心绝缘子与所述过渡板密封连接，所述导电杆贯穿所述空心绝缘子。
PCT/CN2021/116947 2020-09-24 2021-09-07 穿墙套管 WO2022062894A1 (zh)

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