Combined fault self-separation line lightning arrester

Abstract

The invention provides a combined fault self-separation line lightning arrester, which is characterized in that discharge gap lower electrodes are arranged on the same discharge gap lower electrode plate, the discharge gap lower electrode plate is provided with 1-3 discharge gaps, each phase in a three-phase high-voltage line is connected to one discharge gap upper electrode, and the discharge gap upper electrode is connected to the discharge gap lower electrode plate. One discharge gap lower electrode and at least one discharge gap upper electrode form a discharge gap, then the three discharge gaps which are connected in parallel are connected with an over-current protector in series, a disengagement piece is arranged on the over-current protector, and when the over-current protector fails, the disengagement piece drives the over-current protector to disengage automatically. Compared with the prior art, the lightning arrester has the advantages that the three discharge gaps which are connected in parallel are connected with one over-current protection mechanism in series, so that the production and maintenance cost of the lightning arrester is reduced; and meanwhile, the over-current protector is automatically separated, so that the state of the over-current protection mechanism can be conveniently and intuitively observed, and the over-current protection mechanism can be conveniently replaced.

Description

Technical Field

[0001] The invention relates to the field of high-voltage transmission line protection, and more specifically to a combined fault self-detaching line arrester. Background Art

[0002] The overvoltage generated by lightning strikes on high-voltage distribution lines can cause insulator flashover or breakdown, wire breakage, and lightning waves may even invade the substation along the distribution line, affecting the safe operation of the substation and even causing personal safety accidents. In order to avoid the impact of overvoltage caused by lightning strikes, lightning arresters with series discharge gaps are usually installed on high-voltage lines to release the overvoltage generated by lightning strikes and achieve the purpose of overvoltage protection.

[0003] The high-voltage distribution line includes three-phase lines. In the prior art, a set of lightning arresters with a series discharge gap is usually set for each phase line to eliminate the overvoltage of the phase line. However, the commonly used lightning arresters are easily damaged after the overvoltage is released. They are consumable equipment. Therefore, setting a set of lightning arresters for each phase line will increase the cost of equipment use and maintenance. In addition, it is difficult to determine whether a conventional lightning arrester is damaged. If it is necessary to detect whether the lightning arrester is damaged, the line must be powered off and the lightning arrester must be removed for inspection, which will affect the user's power experience. Summary of the invention

[0004] The present invention aims to overcome at least one defect of the above-mentioned prior art and provide a combined fault self-disconnecting line lightning arrester for reducing production and use costs and facilitating detection.

[0005] The technical solution adopted by the present invention is:

[0006] The present invention provides a combined fault self-detaching line arrester, the arrester comprising a three-phase discharge unit, a self-detaching protection unit and a main support insulation unit;

[0007] The main supporting insulating unit comprises a first end and a second end which are arranged opposite to each other;

[0008] The three-phase discharge unit includes three discharge gap upper electrode plates, three secondary support insulation units, and one discharge gap lower electrode plate, each of which is provided with one discharge gap upper electrode; one end of each of the secondary support insulation units is connected to one of the discharge gap upper electrode plates, and the other end is connected to the discharge gap lower electrode plate; 1 to 3 discharge gap lower electrodes are provided on the discharge gap lower electrode plate, and each of the discharge gap lower electrodes forms a discharge gap with at least one of the discharge gap upper electrodes; each of the discharge gap upper electrode plates is connected to one phase of the high-voltage line, and the distance between each two of the discharge gap upper electrode plates is not less than a preset first discharge safety distance;

[0009] The first end of the main supporting insulating unit is fixedly connected to the lower electrode plate of the discharge gap;

[0010] The self-detachable protection unit includes an elastic connection mechanism, an overcurrent protection mechanism and a rotating connection mechanism, wherein the elastic connection mechanism is fixedly electrically connected to the lower electrode plate of the discharge gap; the rotating connection mechanism is fixedly connected to the second end of the main support insulating unit; one end of the overcurrent protection mechanism is elastically electrically connected to the elastic connection mechanism, and the other end of the overcurrent protection mechanism is provided with a detachment member, and the other end of the overcurrent protection mechanism is detachably and electrically connected to the rotating connection mechanism through the detachment member; when the overcurrent protection mechanism fails, the detachment member detaches from the overcurrent protection mechanism, causing the overcurrent protection mechanism to rotate relative to the end where the detachment member is located.

[0011] Each phase in the high-voltage line is connected to an upper electrode of the discharge gap, and at least one lower electrode of the discharge gap can be set as needed to correspond to the upper electrodes of the discharge gaps of the three phases, and the lower electrode of the discharge gap is set on a lower electrode plate of the discharge gap, so that the discharge gaps formed by the three upper electrodes of the discharge gaps are equivalent to being set in parallel, and finally connected in series with an overcurrent protection mechanism through a lower electrode plate of the discharge gap, there is no need to set a series structure formed by the discharge gap and the overcurrent protection mechanism for each phase of the high-voltage line, which greatly saves the cost of production and maintenance; in addition, by setting a detachment piece on the overcurrent protection mechanism, when the overcurrent protection mechanism fails, the detachment piece detaches from the overcurrent protection mechanism, so that the overcurrent protection mechanism can be detached from the elastic connection mechanism and rotate at the rotating connection mechanism, so that it can be intuitively observed that the overcurrent protection mechanism of the arrester has failed and needs to be replaced, which facilitates the maintenance of the arrester.

[0012] Furthermore, the discharge gap upper electrode and the discharge gap lower electrode are both convex hemispherical or conical, and the discharge gap with a fixed distance is formed between the hemispherical surface or conical tip of the discharge gap upper electrode and the corresponding discharge gap lower electrode.

[0013] By arranging the discharge gap upper electrode and the discharge gap lower electrode into a hemispherical shape or a conical shape, discharge can be better achieved between the discharge gap upper electrode and the discharge gap lower electrode.

[0014] Furthermore, the fixed distance forming the discharge gap is 45-85 mm.

[0015] Preferably, one discharge gap lower electrode is arranged on the discharge gap lower electrode plate, and three discharge gap upper electrodes respectively form the discharge gap with one discharge gap lower electrode.

[0016] Preferably, two discharge gap lower electrodes are arranged on the discharge gap lower electrode plate, the distance between the two discharge gap lower electrodes is not less than a preset second discharge safety distance, the two discharge gap upper electrodes respectively form the discharge gap with one discharge gap lower electrode, and one discharge gap upper electrode forms the discharge gap with another discharge gap lower electrode.

[0017] Preferably, three discharge gap lower electrodes are arranged on the discharge gap lower electrode plate, the distance between every two discharge gap lower electrodes is not less than a preset second discharge safety distance, and the three discharge gap upper electrodes correspond to the three discharge gap lower electrodes to form the discharge gap.

[0018] Further, the elastic connection mechanism includes a fixed substrate and an elastic touch plate;

[0019] The fixed substrate is fixedly electrically connected to the lower electrode plate of the discharge gap; the elastic touch plate is arranged below the fixed substrate, the upper surface of one end of the elastic touch plate is fixedly electrically connected to the lower surface of the fixed substrate, the middle part of the other end of the elastic touch plate is bent downward to form a concave structure, the upper surface of the concave structure is elastically connected to the lower surface of the fixed substrate through an elastic mechanism; a convex contact is arranged in the middle part of the lower surface of the concave structure of the elastic touch plate, and the elastic electrical connection between the overcurrent protection mechanism and the elastic connection mechanism is realized through the contact point contacting and electrically connecting with one end of the overcurrent protection mechanism.

[0020] The upwardly concave contact point can be well matched with the overcurrent protection mechanism, and under the action of the concave structure formed by the bending of the elastic touch plate and the elastic mechanism, the overcurrent protection mechanism can be fixed and elastically electrically connected.

[0021] Furthermore, the overcurrent protection mechanism includes an upper contact, an overcurrent protector, an insulating connector and a rotating contact;

[0022] The upper contact is arranged at one end of the overcurrent protector, and the overcurrent protection mechanism is elastically electrically connected to the elastic connection mechanism through the upper contact;

[0023] The other end of the overcurrent protector is connected to one end of the separation member; one end of the insulating connector is fixedly connected to the connection between the overcurrent protector and the separation member, and the other end is rotationally connected to the rotating contact;

[0024] The other end of the disengagement member is fixedly and electrically connected to the rotating contact;

[0025] The rotating connection mechanism includes a concave plate and a fixed plate fixedly connected to the second end of the main supporting insulating unit, the concave part of the concave plate is fixedly connected to the fixed plate, and the ends of both sides of the concave plate are respectively provided with hook structures; the rotating contact is arranged in the groove of the concave plate, and rotating shafts are arranged on both sides of the rotating contact, and the rotating contact and the rotating connection mechanism are detachably connected to each other through the rotating shaft and the hook structure.

[0026] The hook structure can well realize the disassembly and installation of the overcurrent protection mechanism, and the rotation of the overcurrent protection mechanism relative to the rotating connection mechanism is realized through the rotating shaft of the rotating contact and the hook structure; when the overcurrent protection mechanism fails, the disconnector disengages, and the insulating connector loses support and rotates relative to the rotating contact, so that the overcurrent protection mechanism is disengaged from the elastic connection mechanism, and then the overcurrent protection mechanism is rotated relative to the rotating connection mechanism, indicating that the overcurrent protection mechanism has failed, and the state of the overcurrent protection mechanism of the lightning arrester can be observed to intuitively see whether the lightning arrester has failed and the overcurrent protection mechanism needs to be replaced, which is convenient for maintenance; in addition, the overcurrent protection mechanism and the rotating connection mechanism are rotationally electrically connected through the hook structure, and are elastically electrically connected to the elastic connection mechanism, which is convenient for replacing the overcurrent protection mechanism without power outage.

[0027] Furthermore, the elastic connection mechanism also includes a limiting plate;

[0028] The limit plate is arranged below the elastic touch plate, one end of the limit plate is fixedly connected to the lower surface of the fixed substrate, the other end is bent downward and the tail of the other end is arranged as a U-shaped structure, and the overcurrent protection mechanism is limited by the U-shaped structure.

[0029] The overcurrent protection mechanism is further limited by the limiting plate, so that the installation of the overcurrent protection mechanism is more stable, and accidental deviation and falling off during use are avoided.

[0030] Furthermore, an operating pull ring is provided on one side of the upper contact.

[0031] The operating ring can more conveniently enable the staff to replace and install the overcurrent protection mechanism on the bottom surface without power failure, thereby facilitating maintenance operations.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] 1. The present invention arranges the discharge gap lower electrode on the same discharge gap lower electrode plate, and 1-3 discharge gap lower electrodes can be arranged on the discharge gap lower electrode plate as needed, and then each phase in the three-phase high-voltage line is connected to one discharge gap upper electrode, and each discharge gap upper electrode can correspond to one discharge gap lower electrode according to the arrangement of the discharge gap lower electrode, so that one discharge gap lower electrode forms a discharge gap with at least one discharge gap upper electrode, and three discharge gaps connected in parallel are connected in series with one overcurrent protection mechanism, thereby reducing the production and maintenance costs of the arrester;

[0034] 2. The present invention arranges the elastic connection mechanism to be elastically electrically connected to the overcurrent protection mechanism, the rotating connection mechanism to be rotationally electrically connected to the overcurrent protection mechanism, and a disengagement piece is arranged on the overcurrent protection mechanism. When the overcurrent protection mechanism fails, the disengagement piece disengages, so that the overcurrent protection mechanism is separated from the elastic connection mechanism and can rotate relative to the rotating connection mechanism, thereby realizing automatic disengagement of the overcurrent protection mechanism after failure, making it convenient and intuitive to observe the status of the overcurrent protection mechanism, and facilitating the replacement of the overcurrent protection mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is the overall structure diagram of the present invention.

[0036] Figure 2 It is a structural diagram of the three-phase discharge unit of the present invention.

[0037] Figure 3 The structure of the self-detachable protection unit of the present invention is Figure 1 .

[0038] Figure 4 The structure of the self-detachable protection unit of the present invention is Figure 2 .

[0039] The accompanying drawings are marked with: three-phase discharge unit 100, main support insulating unit 200, self-detaching protection unit 300, discharge gap upper electrode plate 110, discharge gap upper electrode 111, secondary support insulating unit 120, discharge gap lower electrode plate 130, discharge gap lower electrode 131, elastic connecting mechanism 310, overcurrent protection mechanism 320, rotating connecting mechanism 330, fixed base plate 311, elastic contact plate 312, limit plate 313, upper contact 321, overcurrent protector 322, detachment piece 323, insulating connector 324, rotating contact 325, operating pull ring 326, fixed plate 331, concave plate 332. DETAILED DESCRIPTION

[0040] The drawings of the present invention are only for illustrative purposes and should not be construed as limiting the present invention. In order to better illustrate the following embodiments, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; it is understandable to those skilled in the art that some well-known structures and their descriptions in the drawings may be omitted.

[0041] Example 1

[0042] Commonly used lightning arresters usually provide a separate set of lightning arresters for each phase of high-voltage line to achieve protection for each phase of the high-voltage line. Usually, an overcurrent protection structure is provided in each set of lightning arresters. The overcurrent protection structure is a consumable. When the operating voltage in the corresponding high-voltage line is too large, resulting in internal breakdown and failure, it needs to be replaced. Then, an overcurrent protection structure is provided for each phase, which will increase the cost of production and maintenance. At the same time, since the failure is caused by internal breakdown, it is impossible to tell from the outside whether the corresponding overcurrent protection structure has failed. It is necessary to cut off the power to the high-voltage line in the corresponding area and remove the corresponding overcurrent protection structure for inspection. The operation is very troublesome. At the same time, power-off maintenance will also reduce the user's electricity experience.

[0043] So if Figure 1 As shown, this embodiment provides a combined fault self-detaching line arrester, which can reduce the cost of production and maintenance and can be more convenient for detection. Specifically, the arrester includes a three-phase discharge unit 100, a self-detaching protection unit 300 and a main support insulation unit 200;

[0044] The main supporting insulating unit 200 includes a first end and a second end that are arranged opposite to each other. In this embodiment, the first end and the second end are the upper end and the lower end of the main supporting insulating unit 200, respectively.

[0045] like Figure 2 As shown, the three-phase discharge unit 100 includes three discharge gap upper electrode plates 110, three secondary support insulation units 120, and one discharge gap lower electrode plate 130, and each of the discharge gap upper electrode plates 110 is provided with a discharge gap upper electrode 111; one end of each of the secondary support insulation units 120 is correspondingly connected to one of the discharge gap upper electrode plates 110, and the other end is connected to the discharge gap lower electrode plate 130; each of the discharge gap upper electrode plates 110 is correspondingly connected to one phase line in the high-voltage line, and the distance between each two of the discharge gap upper electrode plates 110 is not less than a preset first discharge safety distance;

[0046] One to three discharge gap lower electrodes 131 may be disposed on the discharge gap lower electrode plate 130, and each of the discharge gap lower electrodes 131 corresponds to at least one of the discharge gap upper electrodes 111 to form a discharge gap;

[0047] The discharge gap upper electrode 111 and the discharge gap lower electrode 131 are both convex hemispherical or conical, and a discharge gap of a fixed distance is formed between the hemispherical surface or the conical tip of the discharge gap upper electrode 111 and the corresponding discharge gap lower electrode 131, wherein the fixed distance forming the discharge gap is 45-85 mm.

[0048] like Figure 2 As shown, in this embodiment, three discharge gap lower electrodes 131 may be provided on the discharge gap lower electrode plate 130, and by adjusting the specific shape of the discharge gap lower electrode plate 130 and the corresponding distribution of each of the discharge gap lower electrodes 131, the distance between every two discharge gap lower electrodes 131 is not less than a preset second discharge safety distance, and the three discharge gap upper electrodes 111 correspond to the three discharge gap lower electrodes 131 to form the discharge gap respectively;

[0049] The first discharge safety distance and the second discharge safety distance are specifically set according to the voltage of the connected three-phase high-voltage line, so that each component in the arrester can work normally.

[0050] Specifically, a specific implementation of this embodiment is as follows Figure 2As shown, the discharge gap lower electrode plate 130 is arranged in a "cross" shape, the upper surface of the middle connection of the cross is connected to one end of the secondary support insulating unit 120, and the discharge gap upper electrode plate 110 is arranged at the other end of the secondary support insulating unit 120, and the arrangement direction of the discharge gap upper electrode plate 110 matches the front end of the "cross"-shaped discharge gap lower electrode plate 130, and a hemispherical discharge gap lower electrode 131 is arranged on the upper surface of the end point of the front end, and a hemispherical discharge gap upper electrode 111 is arranged at a corresponding position of the lower surface of the discharge gap upper electrode 111, and the discharge gap lower electrode 131 and the discharge gap upper electrode 111 form a discharge gap; in addition, the left and right ends of the "cross"-shaped discharge gap lower electrode plate 130 are respectively bent downward at the end point and then extended backward to form two electrode setting areas, and the electrode setting areas are arranged near the bend. A secondary supporting insulating unit 120 is respectively arranged at one end of the folding part, and the other end of the secondary supporting insulating unit 120 is connected to the discharge gap upper electrode plate 110, the arrangement direction of the discharge gap upper electrode plate 110 matches the extension direction of the electrode arrangement area, and the discharge gap lower electrode 131 and the discharge gap upper electrode 111 are respectively arranged at corresponding positions of the electrode arrangement area and the corresponding surfaces of the discharge gap upper electrode plate 110 to form the discharge gap; in other embodiments, the specific shape of the discharge gap lower electrode plate 130 can be changed according to the voltage of the specifically connected high-voltage line to realize the arrangement of the discharge gap lower electrode 131, the secondary supporting insulating unit 120, the discharge gap upper electrode plate 110 and the discharge gap upper electrode 111, so that they meet the preset first discharge safety distance and second discharge safety distance, which is not further limited here.

[0051] In another preferred embodiment, one discharge gap lower electrode 131 may be provided on the discharge gap lower electrode plate 130, and three discharge gap upper electrodes 111 respectively form the discharge gap with one discharge gap lower electrode 131; wherein the shape of the discharge gap lower electrode plate 130 may be adjusted to realize the arrangement of each of the secondary supporting insulating units 120 and the corresponding discharge gap upper electrode plate 110, so that the first discharge safety distance can be met between the three discharge gap upper electrodes 111, and the discharge gap is formed with one discharge gap lower electrode 131 at the same time;

[0052] In another preferred embodiment, two discharge gap lower electrodes 131 may be arranged on the discharge gap lower electrode plate 130, and the distance between the two discharge gap lower electrodes 131 is not less than a preset second discharge safety distance; wherein the shape of the discharge gap lower electrode plate 130 may be adjusted to realize the arrangement of each of the secondary supporting insulating units 120 and the corresponding discharge gap upper electrode plate 110, so that two of the discharge gap upper electrodes 111 form the discharge gap with one of the discharge gap lower electrodes 131, and one of the discharge gap upper electrodes 111 forms the discharge gap with another of the discharge gap lower electrodes 131.

[0053] The first end of the main supporting insulating unit 200 is connected to the lower surface of the cross center of the "X"-shaped discharge gap lower electrode plate 130;

[0054] like Figure 1-3 As shown, the self-detachable protection unit 300 includes an elastic connection mechanism 310, an overcurrent protection mechanism 320 and a rotating connection mechanism 330, wherein the elastic connection mechanism 310 is fixedly electrically connected to the lower electrode plate 130 of the discharge gap; the rotating connection mechanism 330 is fixedly connected to the second end of the main support insulation unit 200; one end of the overcurrent protection mechanism 320 is elastically electrically connected to the elastic connection mechanism 310, and the other end of the overcurrent protection mechanism 320 is provided with a detachment member 323, and the other end of the overcurrent protection mechanism 320 is detachably and electrically connected to the rotating connection mechanism 330 through the detachment member 323; when the overcurrent protection mechanism 320 fails, the detachment member 323 detaches from the overcurrent protection mechanism 320, so that the overcurrent protection mechanism 320 rotates relative to the end where the detachment member 323 is located.

[0055] Specifically, Figure 3 and Figure 4 As shown, in this embodiment,

[0056] The elastic connection mechanism 310 includes a fixed substrate 311 and an elastic touch plate 312;

[0057] The fixed substrate 311 is fixedly electrically connected to the cross-shaped rear end of the discharge gap lower electrode plate 130; the elastic touch plate 312 is arranged below the fixed substrate 311, the upper surface of one end of the elastic touch plate 312 is fixedly electrically connected to the lower surface of the fixed substrate 311, the middle part of the other end of the elastic touch plate 312 is bent downward to form a concave structure, and the upper surface of the concave structure is elastically connected to the lower surface of the fixed substrate 311 through an elastic mechanism; a convex contact is arranged in the middle part of the lower surface of the concave structure of the elastic touch plate 312, and the elastic electrical connection between the overcurrent protection mechanism 320 and the elastic connection mechanism 310 is realized through the contact point and one end of the overcurrent protection mechanism 320.

[0058] The elastic connection mechanism 310 further includes a limit plate 313. Figure 2 As shown, the limit plate 313 is arranged below the elastic touch plate 312. Specifically, one end of the limit plate 313 is fixedly connected to the lower surface of the fixed base plate 311, and the other end is bent downward and the end of the other end is arranged as a U-shaped structure. The U-shaped structure includes a vertically arranged baffle and two parallel limit rods. One side of the baffle is fixedly connected to the other end of the limit plate 313, and two limit rods are arranged on the other side of the baffle. The two limit rods are respectively arranged at two ends of the same side of the baffle, and the overcurrent protection mechanism 320 is limited by the U-shaped structure formed by the baffle and the limit rod.

[0059] The overcurrent protection mechanism 320 includes an upper contact 321, an overcurrent protector 322, an insulating connector 324 and a rotating contact 325;

[0060] The upper contact 321 is arranged at the upper end of the overcurrent protector 322, and the overcurrent protection mechanism 320 is elastically electrically connected to the elastic connection mechanism 310 through the upper contact 321. Specifically, the upper contact 321 is arranged in an arc shape, and is used to match the upward convex contact point arranged on the elastic contact plate 312 of the elastic connection mechanism 310, and together with the limiting plate 313, the overcurrent protection mechanism 320 is limited and fixed;

[0061] Furthermore, an operating pull ring 326 is provided on one side of the upper contact 321 , and the operating pull ring 326 can facilitate the staff to install and disassemble the overcurrent protection mechanism 320 on the bottom surface through an operating rod.

[0062] like Figure 3 and Figure 4As shown, the lower end of the overcurrent protector 322 is connected to the upper end of the separation member 323; one end of the insulating connector 324 is fixedly connected to the connection between the overcurrent protector 322 and the separation member 323, and the other end extends obliquely downward to be rotatably connected to the rotating contact 325; the other end of the separation member 323 is fixedly electrically connected to the rotating contact 325;

[0063] Specifically, the rotating contact 325 includes a rotating shaft portion and a conductive support portion, the conductive support portion is arranged at the bottom of the rotating shaft portion, the other end of the insulating connecting rod is rotatably connected to the rotating shaft portion, and the rotating shaft portion is fixedly electrically connected to the bottom end of the separation member 323 through the conductive support portion;

[0064] The rotating connection mechanism 330 includes a concave plate 332 and a fixed plate 331 fixedly connected to the second end of the main supporting insulating unit 200, the concave portion of the concave plate 332 is fixedly connected to the fixed plate 331, the opening of the concave plate 332 is downward, and the ends of both sides of the concave plate 332 are respectively provided with hook structures with openings facing upward; the rotating contact 325 is arranged in the groove of the concave plate 332, and rotating shafts are arranged on both sides of the rotating contact 325, and the rotating contact 325 and the rotating connection mechanism 330 are detachably connected to each other through the rotating shaft and the hook structure.

[0065] Specifically, in the specific real-time mode of the present embodiment, the three-phase high-voltage line is electrically connected to the three discharge gap upper electrodes 111 respectively, and the three discharge gap lower electrodes 131 are respectively arranged on the discharge gap lower electrode plate 130, and the three discharge gap upper electrodes 111 and the discharge gap lower electrode 131 respectively form the discharge gaps corresponding to the three-phase high-voltage line, which are used to realize the primary protection of the three-phase high-voltage line. Furthermore, the three discharge gaps are connected to the self-detaching protection unit 300 through the discharge gap lower electrode plate 130, and the self-detaching protection unit 300 includes the overcurrent protector 322 provided with the detachment member 323, and the overcurrent protector 322 can eliminate the overvoltage in the three-phase high-voltage line through its resistance characteristics. Thereby achieving secondary protection of the three-phase high-voltage line; when the overvoltage protector is completely broken down and fails, the detachment member 323 detaches from the lower end of the overcurrent protector 322, causing the insulating connector 324 and the transmission contact to lose support, and the insulating connecting rod drives the overcurrent protector 322 to rotate downward, so that the upper contact 321 at the upper end of the overcurrent protector 322 is detached from the contact in the elastic connecting mechanism 310, thereby enabling the overcurrent protection mechanism 320 to flip downward relative to the rotating connecting mechanism 330, so that the staff can judge whether the overcurrent protector 322 in the overcurrent protection mechanism 320 has failed by observing the state of the overcurrent protection mechanism 320 on the arrester, and can more conveniently implement the maintenance of the arrester.

[0066] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the technical solution of the present invention, and are not intended to limit the specific implementation methods of the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the claims of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A combined fault self-disconnecting line arrester, characterized in that: The arrester comprises a three-phase discharge unit, a self-detaching protection unit and a main support insulation unit; The main supporting insulating unit comprises a first end and a second end which are arranged opposite to each other; The three-phase discharge unit includes three discharge gap upper electrode plates, three secondary support insulation units, and one discharge gap lower electrode plate, each of which is provided with one discharge gap upper electrode; one end of each of the secondary support insulation units is connected to one of the discharge gap upper electrode plates, and the other end is connected to the discharge gap lower electrode plate; 1 to 3 discharge gap lower electrodes are arranged on the discharge gap lower electrode plate, each of the discharge gap lower electrodes corresponds to at least one discharge gap upper electrode to form a discharge gap; each of the discharge gap upper electrode plates corresponds to a phase line in the high voltage line, and the distance between each two discharge gap upper electrode plates is not less than a preset first discharge safety distance; The first end of the main supporting insulating unit is fixedly connected to the lower electrode plate of the discharge gap; The self-detachable protection unit comprises an elastic connection mechanism, an overcurrent protection mechanism and a rotation connection mechanism, wherein the elastic connection mechanism is fixedly electrically connected to the lower electrode plate of the discharge gap; the rotation connection mechanism is fixedly connected to the second end of the main support insulation unit; one end of the overcurrent protection mechanism is elastically electrically connected to the elastic connection mechanism, and the other end of the overcurrent protection mechanism is provided with a detachable member, and the other end of the overcurrent protection mechanism is detachably and rotationally electrically connected to the rotation connection mechanism through the detachable member; When the overcurrent protection mechanism fails, the separation member separates from the overcurrent protection mechanism, causing the overcurrent protection mechanism to rotate relative to the end where the separation member is located.

2. A combined fault self-isolating line arrester according to claim 1, characterized in that: The discharge gap upper electrode and the discharge gap lower electrode are both convex hemispherical or conical, and the discharge gap with a fixed distance is formed between the hemispherical surface or conical tip of the discharge gap upper electrode and the corresponding discharge gap lower electrode.

3. A combined fault self-isolating line arrester according to claim 2, characterized in that: The fixed distance forming the discharge gap is 45-85 mm.

4. A combined fault self-disconnecting line arrester according to any one of claims 1 to 3, characterized in that: One discharge gap lower electrode is arranged on the discharge gap lower electrode plate, and three discharge gap upper electrodes respectively form the discharge gap with one discharge gap lower electrode.

5. A combined fault self-disconnecting line arrester according to any one of claims 1 to 3, characterized in that: Two discharge gap lower electrodes are arranged on the discharge gap lower electrode plate, the distance between the two discharge gap lower electrodes is not less than a preset second discharge safety distance, the two discharge gap upper electrodes respectively form the discharge gap with one discharge gap lower electrode, and one discharge gap upper electrode forms the discharge gap with another discharge gap lower electrode.

6. A combined fault self-isolating line arrester according to any one of claims 1 to 3, characterized in that: Three discharge gap lower electrodes are arranged on the discharge gap lower electrode plate, the distance between every two discharge gap lower electrodes is not less than a preset second discharge safety distance, and the three discharge gap upper electrodes correspond to the three discharge gap lower electrodes to form the discharge gap.

7. A combined fault self-isolating line arrester according to claim 1, characterized in that: The elastic connection mechanism includes a fixed substrate and an elastic touch plate; The fixed substrate is fixedly electrically connected to the electrode plate below the discharge gap; the elastic touch plate is arranged below the fixed substrate, the upper surface of one end of the elastic touch plate is fixedly electrically connected to the lower surface of the fixed substrate, the middle part of the other end of the elastic touch plate is bent downward to form a concave structure, and the upper surface of the concave structure is elastically connected to the lower surface of the fixed substrate through an elastic mechanism; a convex contact is arranged in the middle part of the lower surface of the concave structure of the elastic touch plate, and the elastic electrical connection between the overcurrent protection mechanism and the elastic connection mechanism is realized through the contact point contacting and electrically connecting with one end of the overcurrent protection mechanism.

8. A combined fault self-isolating line arrester according to claim 1, characterized in that: The overcurrent protection mechanism comprises an upper contact, an overcurrent protector, an insulating connector and a rotating contact; The upper contact is arranged at one end of the overcurrent protector, and the overcurrent protection mechanism is elastically electrically connected to the elastic connection mechanism through the upper contact; The other end of the overcurrent protector is connected to one end of the separation member; one end of the insulating connector is fixedly connected to the connection between the overcurrent protector and the separation member, and the other end is rotationally connected to the rotating contact; The other end of the disengagement member is fixedly and electrically connected to the rotating contact; The rotating connection mechanism includes a concave plate and a fixed plate fixedly connected to the second end of the main supporting insulating unit, the concave part of the concave plate is fixedly connected to the fixed plate, and the ends of both sides of the concave plate are respectively provided with hook structures; the rotating contact is arranged in the groove of the concave plate, and rotating shafts are arranged on both sides of the rotating contact, and the rotating contact and the rotating connection mechanism are detachably connected to each other through the rotating shaft and the hook structure.

9. A combined fault self-isolating line arrester according to claim 7, characterized in that: The elastic connection mechanism also includes a limiting plate; The limit plate is arranged below the elastic touch plate, one end of the limit plate is fixedly connected to the lower surface of the fixed substrate, the other end is bent downward and the tail of the other end is arranged as a U-shaped structure, and the overcurrent protection mechanism is limited by the U-shaped structure.

10. A combined fault self-isolating line arrester according to claim 8, characterized in that: An operating pull ring is arranged on one side of the upper contact.

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