阅读说明：本技术 一种高压开关设备用绝缘拉杆 (Insulating pull rod for high-voltage switch equipment ) 是由 陈允 韩先才 刘志刚 崔博源 肖刚 殷禹 张鹏飞 王浩然 吴昱怡 刘焱 于 2020-12-30 设计创作，主要内容包括：本发明提供了一种高压开关设备用绝缘拉杆,该绝缘拉杆包括：绝缘管体和两个金属接头；其中,所述绝缘管体的两端分别插接在两个所述金属接头内,并且,各所述金属接头和所述绝缘管体之间在所述绝缘管体的外周均具有环形屏蔽间隙,用以屏蔽所述绝缘管体和所述金属接头之间的放电。本发明通过所述金属接头和所述绝缘管体之间在所述绝缘管体的外周均具有环形屏蔽间隙,屏蔽所述绝缘管体和所述金属接头之间的放电,避免该绝缘拉杆尤其是金属接头和所述绝缘管体结合的位置产生局部放电,以确保该绝缘拉杆的电场均匀性,进而确保了该绝缘拉杆的绝缘特性,使得该绝缘拉杆安全可靠工作。(The invention provides an insulating pull rod for high-voltage switch equipment, which comprises: the insulating pipe body and the two metal joints; the two ends of the insulating pipe body are respectively inserted into the two metal connectors, and an annular shielding gap is formed between each metal connector and the insulating pipe body at the periphery of the insulating pipe body and used for shielding discharge between the insulating pipe body and the metal connectors. According to the invention, the annular shielding gaps are formed on the periphery of the insulating pipe body between the metal joint and the insulating pipe body, so that discharge between the insulating pipe body and the metal joint is shielded, and partial discharge is avoided at the joint position of the insulating pull rod, especially the metal joint and the insulating pipe body, so as to ensure the electric field uniformity of the insulating pull rod, further ensure the insulating property of the insulating pull rod, and ensure safe and reliable operation of the insulating pull rod.)

1. An insulating pull rod for high-voltage switchgear, comprising: the insulating pipe body and the two metal joints; wherein the content of the first and second substances,

two ends of the insulating pipe body are respectively inserted into the two metal connectors, and an annular shielding gap is formed between each metal connector and the insulating pipe body at the periphery of the insulating pipe body and used for shielding discharge between the insulating pipe body and the metal connectors.

2. The insulated rod for high-voltage switchgear according to claim 1, wherein the metal joint comprises: a plug head and an outer sleeve; wherein the content of the first and second substances,

the outer sleeve is detachably sleeved outside the plug head, and an annular slot is formed between the outer sleeve and the plugging part of the plug head and used for being inserted at the end part of the insulating pipe body.

3. The insulating tie rod for high voltage switchgear according to claim 2, wherein the outer sleeve comprises: the sleeve comprises a sleeve body and a connecting plate; wherein the content of the first and second substances,

the connecting plate is arranged at the first opening end of the sleeve body and is used for being pressed and contacted on the pressing part of the plug head;

the second open end of sleeve pipe body is equipped with annular shielding lip, its to the periphery setting of sleeve pipe body, and, the inner wall of annular shielding lip is equipped with the breach, so that annular shielding lip with form between the insulating body annular shielding clearance.

4. The insulated draw bar for high voltage switchgear according to claim 3,

the edge of the annular shielding lip is a transition arc, and the transition arc is also arranged between the annular shielding lip and the outer wall of the sleeve body.

5. The insulating rod for high-voltage switchgear according to claim 2,

the outer wall of the filling part of the plug head is provided with external threads, and the outer wall of the insulating pipe body is provided with internal threads which are in threaded connection with the outer wall of the filling part.

6. The insulating rod for high-voltage switchgear according to claim 2,

the inner wall of the outer sleeve is provided with internal threads, and the inner wall of the insulating pipe body is provided with external threads which are in threaded connection with the inner wall of the outer sleeve.

7. The insulating rod of claim 2, wherein the outer sleeve and the plug head are detachably connected by a bolt.

8. The insulated draw bar for high voltage switchgear according to any of claims 1 to 7,

insulating body from interior to exterior includes in proper order: the fiber layer comprises an inner polyester fiber layer, a middle aramid fiber layer and an outer polyester fiber layer.

9. The insulating rod for high-voltage switchgear according to claim 8,

and epoxy resin is filled in fiber gaps on the inner polyester fiber layer, the middle aramid fiber layer and/or the outer polyester fiber layer.

10. The insulating rod for high-voltage switchgear according to claim 8,

the inner polyester fiber layer and/or the outer polyester fiber layer are/is formed by winding a polyester non-woven fabric;

the middle aramid fiber layer is formed by winding aramid 1313 filaments.

Technical Field

The invention relates to the technical field of composite insulating materials and high-voltage switches, in particular to an insulating pull rod for high-voltage switch equipment.

Background

The insulating pull rod is a key component of the high-voltage switch equipment and is used for transmitting motion from a grounding part to an insulating member of a high-potential part so as to realize the connection and disconnection of electrical connection. The insulating pull rod is structurally characterized by being thin and long, and bears certain tensile and compressive loads and instantaneous operation impact voltage in the opening and closing operation process of the circuit breaker, so that excellent mechanical and electrical properties are required.

And the electrified part and the insulating part on the present insulating pull rod are easy to discharge, influence the electrical property of the insulating pull rod, and have safety risk when the insulating pull rod is used.

Disclosure of Invention

In view of this, the invention provides an insulating pull rod for high-voltage switchgear, which aims to solve the problem of safety risk caused by discharge generated between a live part and an insulating part on the existing insulating pull rod.

The invention provides an insulating pull rod for high-voltage switch equipment, which comprises: the insulating pipe body and the two metal joints; the two ends of the insulating pipe body are respectively inserted into the two metal connectors, and an annular shielding gap is formed between each metal connector and the insulating pipe body at the periphery of the insulating pipe body and used for shielding discharge between the insulating pipe body and the metal connectors.

Further, the above-mentioned insulating pull rod for high tension switchgear, the metal joint includes: a plug head and an outer sleeve; the outer sleeve is detachably sleeved outside the plug head, and an annular slot is formed between the outer sleeve and the filling part of the plug head and used for being inserted into the end part of the insulating pipe body.

Further, the insulating rod for a high voltage switchgear, the outer sleeve includes: the sleeve comprises a sleeve body and a connecting plate; the connecting plate is arranged at the first opening end of the sleeve body and is used for being pressed and contacted on the pressing part of the plug head; the second open end of sleeve pipe body is equipped with annular shielding lip, its to the periphery setting of sleeve pipe body, and, the inner wall of annular shielding lip is equipped with the breach, so that annular shielding lip with form between the insulating body annular shielding clearance.

Further, according to the insulating pull rod for the high-voltage switch equipment, the edge of the annular shielding lip is a transition arc, and the transition arc is also arranged between the annular shielding lip and the outer wall of the sleeve body.

Further, according to the insulating pull rod for the high-voltage switch equipment, the outer wall of the plug filling portion of the plug head is provided with an external thread, and the outer wall of the insulating pipe body is provided with an internal thread which is in threaded connection with the outer wall of the plug filling portion.

Further, above-mentioned high tension switchgear is with insulating pull rod, the inner wall of outer tube is equipped with the internal thread, and, the inner wall of insulating body is equipped with the external screw thread, its with the inner wall threaded connection of outer tube.

Furthermore, the insulating pull rod for the high-voltage switch equipment is detachably connected between the outer sleeve and the plug head through a bolt.

Further, above-mentioned high tension switchgear is with insulating pull rod, insulating body from interior to exterior includes in proper order: the fiber layer comprises an inner polyester fiber layer, a middle aramid fiber layer and an outer polyester fiber layer.

Furthermore, in the insulating pull rod for the high-voltage switch equipment, the fiber gaps on the inner polyester fiber layer, the middle aramid fiber layer and/or the outer polyester fiber layer are filled with epoxy resin.

Furthermore, in the insulating pull rod for the high-voltage switch equipment, the inner polyester fiber layer and/or the outer polyester fiber layer are/is formed by winding a polyester non-woven fabric; the middle aramid fiber layer is formed by winding aramid 1313 filaments.

According to the insulating pull rod for the high-voltage switch equipment, the annular shielding gaps are formed in the periphery of the insulating pipe body between the metal connector and the insulating pipe body, so that discharge between the insulating pipe body and the metal connector is shielded, and the insulating pull rod, particularly the position where the metal connector and the insulating pipe body are combined, is prevented from generating local discharge, so that the electric field uniformity of the insulating pull rod is ensured, the insulating property of the insulating pull rod is further ensured, and the insulating pull rod can work safely and reliably.

Further, because insulating body includes the interior polyester fiber layer that sets gradually from inside to outside, middle aramid fiber layer and outer polyester fiber layer, like this, insulating body's inner wall and outer wall all comprise the polyester fiber layer, the surface that insulating body can be guaranteed on the polyester fiber layer is comparatively smooth, make insulating body have better insulating properties, middle aramid fiber layer mechanical properties is good, can guarantee that insulating body's tensile strength and compressive strength are high, in order to ensure its mechanical properties.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:

fig. 1 is a front view of an insulated rod for a high voltage switchgear according to an embodiment of the present invention;

fig. 2 is a schematic cross-sectional view of an insulating tube according to an embodiment of the present invention.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

Referring to fig. 1, a front view of an insulated pull rod for a high voltage switchgear according to an embodiment of the present invention is shown. As shown, the insulated pull rod includes: an insulating pipe body 1 and two metal joints 2; wherein the content of the first and second substances,

two ends (the left end and the right end as shown in fig. 1) of the insulating tube body 1 are respectively inserted into the two metal connectors 2, and an annular shielding gap 3 is arranged between each metal connector 2 and the insulating tube body 1 at the periphery of the insulating tube body 1 to shield discharge between the insulating tube body 1 and the metal connectors 2, so that the insulating pull rod is prevented from generating partial discharge, the electric field uniformity of the insulating pull rod is ensured, the insulating property of the insulating pull rod is further ensured, and the insulating pull rod can work safely and reliably. Specifically, two ends of the insulating pipe body 1 can be respectively bonded to the two metal joints 2 by using a high-strength bonding material, so that the connection strength between the insulating pipe body 1 and the two metal joints 2 is ensured, and the reliable working performance of the insulating pull rod is ensured. The two metal connectors 2 can be respectively connected with an arc extinguish chamber and an operating mechanism of the circuit breaker to realize transmission between the two metal connectors, and meanwhile, the metal connectors 2 can ensure connection stability. Wherein, the annular shielding gap 3 is arranged along the whole circumference of the periphery of the insulating tube body 1 to ensure the uniformity of shielding discharge.

Referring to fig. 2, a cross-sectional view of an insulating tube according to an embodiment of the present invention is shown. As shown in the figure, this insulating body 1 includes from inside to outside in proper order: the insulating pipe body 1 comprises an inner polyester fiber layer 11, a middle aramid fiber layer 12 and an outer polyester fiber layer 13, so that the inner wall and the outer wall of the insulating pipe body 1 are both formed by the polyester fiber layers, the inner polyester fiber layer 11 and the outer polyester fiber layer 13 can ensure that the surface of the insulating pipe body 1 is smooth, the electric field distribution of the edge surface of the insulating pipe body 1 is uniform, and the insulating pipe body 1 has good insulating performance; the middle aramid fiber layer 4 has good mechanical property, and can ensure that the tensile strength and the compressive strength of the insulating tube body 1 are high, so that the mechanical property of the insulating tube body 1 is improved, and the mechanical property of the insulating pull rod is improved. In the present embodiment, in order to enhance the strength of the insulating pipe body 1, the fiber gaps on the inner polyester fiber layer 11, the middle aramid fiber layer 12 and/or the outer polyester fiber layer 13 are filled with epoxy resin to ensure the mechanical properties of the inner polyester fiber layer 11, the middle aramid fiber layer 12 and/or the outer polyester fiber layer 13; the inner polyester fiber layer 11 and/or the outer polyester fiber layer 13 may be formed by winding a polyester non-woven fabric, and the middle aramid fiber layer 12 is formed by winding aramid 1313 filaments. When the insulating pipe body 1 is manufactured, the inner polyester fiber layer 3 is wound by polyester fibers, the middle aramid fiber layer 4 is wound by aramid fibers, the outer polyester fiber layer 5 is wound by polyester fibers, the insulating pipe body 1 is impregnated by liquid resin materials, and the insulating pipe body 1 is heated and cured in a curing furnace after being impregnated, so that cured epoxy resin materials are formed among fiber gaps of the inner polyester fiber layer 3, the middle aramid fiber layer 4 and the outer polyester fiber layer 5.

With continued reference to fig. 1, the metal joint 2 includes: a plug 21 and an outer sleeve 22; the outer sleeve 22 is detachably sleeved outside the plug 21, and an annular slot is formed between the outer sleeve 22 and the filling portion 211 of the plug 21 for being inserted into an end of the insulating tube 1, so that the insulating tube 1 is inserted into the annular slot, and the end of the insulating tube 1 can be bonded in the annular slot, for example, by a glue layer. Specifically, the plug 21 includes a plugging portion 211 and a pressing portion 212 connected to each other, the plugging portion 211 is plugged in an end of the insulating tube 1, and the pressing portion 212 presses against an end surface of the insulating tube 1 to limit the plug 21. The outer sleeve 22 is sleeved outside the plug 21 and detachably connected with the plug 21 through a bolt 23, so that the plug 21 and the outer sleeve 22 are sequentially assembled on the insulating tube body 1. In order to improve the connection stability between the plugs 21 and the insulating tube body 1, preferably, the outer wall of the filling portion 211 is provided with an external thread, and the outer wall of the insulating tube body 1 is provided with an internal thread which is in threaded connection with the outer wall of the filling portion 211, and meanwhile, the two are bonded through a glue layer, and the threaded connection and the glue layer can improve the connection stability between the two simultaneously; in order to improve the connection stability between the outer sleeve 22 and the insulating tube 1, preferably, the inner wall of the outer sleeve 22 is provided with an internal thread, and the outer wall of the insulating tube 1 is provided with an internal thread, which is connected with the outer wall of the packing portion 211 in a threaded manner, and simultaneously, the two are bonded together by a glue layer, and the threaded connection and the glue layer can improve the connection stability between the two at the same time.

With continued reference to fig. 1, the outer sleeve 22 includes: a sleeve body 221 and a connection plate 222; the connecting plate 222 is disposed at a first opening end (left end as shown in fig. 1) of the sleeve body 221, and is configured to be pressed against the pressing portion 212 of the plug 21; the second open end (right end as viewed in fig. 1) of the sleeve body 221 is provided with an annular shield lip 223 which is disposed toward the outer periphery of the sleeve body 221, and the inner wall of the annular shield lip 223 is provided with a notch so that an annular shield gap 3 is formed between the annular shield lip 223 and the insulating tube body 1. Specifically, the sleeve body 221 may be a circular tube structure with openings at both ends, and the connecting plate 222 may be an annular structure, so as to pass through the mounting hole in the middle of the connecting plate 222 through the bolt 23, thereby realizing detachable connection between the connecting plate and the plug 21, and further realizing connection between the outer sleeve 22 and the plug 21. The arrangement of the annular shielding lip 223 can enable an electric field to be uniformly distributed, so that the generation of partial discharge is avoided, and the insulation characteristic of the insulation pull rod is further improved; preferably, the edge of the annular shielding lip 223 is a transition arc, and a transition arc is also arranged between the annular shielding lip 223 and the outer wall of the sleeve body 1, so that the electric field is relatively uniform near the position where the metal joint 2 and the insulating tube 1 are combined, and thus, the discharge at the position where the metal joint 2 and the insulating tube body 1 are combined can be prevented again. Wherein, the sleeve body 221, the connecting plate 222 and the annular shielding lip 223 may be an integral structure.

In summary, the insulating pull rod for the high voltage switchgear provided by this embodiment, the annular shielding gap 3 is provided at the periphery of the insulating pipe body 1 between the metal joint 2 and the insulating pipe body 1, so as to shield the discharge between the insulating pipe body and the metal joint, and avoid the insulating pull rod, especially the position where the metal joint 2 and the insulating pipe body 1 are combined, from generating the partial discharge, so as to ensure the electric field uniformity of the insulating pull rod, and further ensure the insulating property of the insulating pull rod, so that the insulating pull rod can work safely and reliably.

Further, because insulating body 1 includes from inside to outside the inner polyester fiber layer 11 that sets gradually, middle aramid fiber layer 12 and outer polyester fiber layer 13, like this, insulating body 1's inner wall and outer wall all comprise the polyester fiber layer, the surface that insulating body can be guaranteed on the polyester fiber layer is comparatively smooth, make insulating body have better insulating properties, middle aramid fiber layer mechanical properties is good, can guarantee that insulating body's tensile strength and compressive strength are high, in order to ensure its mechanical properties.

It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.