CN116505502A - Bushing type intelligent overvoltage protector - Google Patents

Abstract

The invention relates to the field of high-voltage electrical appliances, in particular to a sleeve type intelligent overvoltage protector, which comprises a lightning arrester sleeve assembly, wherein: the two ends of the sleeve are respectively protruded/inserted into the base and the base, and the capacitive screens between the capacitive screens at the innermost/outer layers of the sleeve are led out of the first lead and are respectively electrically connected with a high-voltage power supply/ground; the phase-to-ground arrester is sleeved outside the sleeve and positioned outside the base, and a second lead is led out between the capacitor screens of the innermost/outer layers of the phase-to-ground arrester supporting tube and is electrically connected with a high-voltage power supply/ground respectively; the outer ends of conductors of the three groups of bushings are respectively and electrically connected with three phases of a high-voltage power supply, the inner ends of the conductors are respectively and electrically connected with the ground through a group of phase-to-ground arresters, a group of phase-to-phase arresters are connected in series between any two groups of conductors, and a third wire is led out from a capacitance screen between the innermost/outer capacitance screens of a phase-to-phase arresters supporting tube of the phase-to-phase arresters and is respectively and electrically connected with the high-voltage power supply and the ground; the sleeve type intelligent overvoltage protector is reasonable in layout and can monitor the state of the sleeve type intelligent overvoltage protector.

Description

Bushing type intelligent overvoltage protector

technical field

The invention relates to the field of high-voltage electrical appliances, in particular to a bushing type intelligent overvoltage protector.

Background technique

The existing six-column overvoltage protector has the following problems:

1. Lack of necessary detection means, unable to monitor their work and health status;

2. The structural layout is unreasonable, and the overall space is large;

3. The base structure is made by injection molding, and the components inside the base cannot be maintained and replaced.

Contents of the invention

The purpose of the present invention is to overcome at least one defect of the prior art, and provide a bushing type intelligent overvoltage protector, which has a reasonable layout and can monitor its own state.

To achieve the above object, the present invention adopts the following technical solutions:

A bushing type intelligent overvoltage protector, which includes a base, three sets of arrester bushing assemblies, and three sets of phase-to-phase arresters arranged in the base;

The arrester bushing assembly includes a bushing and a phase-ground arrester, one end of the bushing is inserted in the base, the other end is located outside the base, and the phase-ground arrester is arranged outside the base and sleeved outside the bushing; the bushing includes a conductor And the bushing insulating core wrapped outside the conductor, the bushing insulating core includes a plurality of capacitive screens alternately arranged with the insulating layer, the innermost and outermost capacitive screens are respectively electrically connected to the high-voltage power supply and the ground, and the last The capacitive screen between the inner layer and the outermost layer leads out the first wire; the phase-ground arrester includes a phase-ground arrester support tube and a plurality of stacked ring-shaped second valve plates arranged in the phase-ground arrester support tube, and each second The two valve pieces are sleeved outside the bushing, and the support tube of the phase-to-ground arrester includes multiple capacitive screens alternately arranged with the insulating layer. The innermost capacitive screen is electrically connected to the high-voltage power supply, and the outermost capacitive screen is electrically connected to the ground phase. , the capacitive screen between the innermost layer and the outermost layer leads to the second wire; one end of the three groups of conductors is respectively used for the three-phase electrical connection of the high-voltage power supply, and the other end is electrically connected to the ground phase through a set of phase-to-ground arresters. ; A group of interphase arresters are connected in series between any two groups of conductors;

The interphase arrester includes an interphase arrester support tube and a plurality of stacked first valve plates arranged in the interphase arrester support tube, the interphase arrester support tube includes a plurality of capacitive screens alternately arranged with insulating layers, the innermost layer and the outermost layer The capacitive screens are electrically connected to the high-voltage power supply and the ground phase respectively, and the third wire is drawn from the capacitive screen between the innermost layer and the outermost layer.

Further, the capacitive screen of the support tube of the phase-to-ground arrester forms two capacitors connected in series between the high-voltage power supply and the ground phase, and the two capacitors are connected in parallel with the second valve group formed by the second valve plate, and the two capacitors are respectively capacitor C0 and capacitor C1.

Further, in the supporting tube of the phase-to-ground arrester, from the innermost capacitive screen to the outermost capacitive screen, they are offset one by one to the side where the base is located in a step shape.

Further, the support tube of the phase-ground arrester also includes a first intermediate capacitive screen located between the outermost and innermost capacitive screens, at least one first intermediate capacitive screen includes a plurality of pieces arranged side by side along the axial direction of the phase-ground arrester The first sub-capacitance screens, each first sub-capacitance screen has the same radial distance from the conductor of the corresponding bushing.

Further, the capacitive screen of the support tube of the interphase arrester forms capacitor C2, capacitor C3 and capacitor C4, capacitor C2 and capacitor C3 are connected in parallel with the first valve plate group formed by the first valve plate of the interphase arrester, capacitor C2 and capacitor The node between C3 is electrically connected to the ground through the capacitor C4.

Further, the supporting tube of the interphase arrester includes a first capacitive screen group, a second capacitive screen group and a third capacitive screen group, the first capacitive screen group and the second capacitive screen group are arranged side by side along the axial direction of the interphase arrester, and the third The capacitive screen group is wrapped outside the first capacitive screen group and the second capacitive screen group;

In the first capacitive screen group, from the innermost capacitive screen to the outermost capacitive screen, it is stepwise offset to the side where the second capacitive screen group is located, and the second capacitive screen group and the first The capacitive screens of the capacitive screen group are symmetrical to each other; the innermost capacitive screens of the first capacitive screen group and the second capacitive screen group are respectively connected with the axial two sides of the first valve plate group formed by the first valve plate of the interphase arrester. terminal connection.

Further, in the third capacitive screen group, the two ends of each capacitive screen shrink from the innermost capacitive screen to the outermost capacitive screen in a stepwise manner towards the axial middle of the interphase arrester; and/or, The first capacitive screen group includes a second intermediate capacitive screen located between the innermost and outermost capacitive screens, and at least one second intermediate capacitive screen includes a plurality of second partial capacitors arranged side by side along the axial direction of the interphase arrester screen, the radial distance between each second sub-capacitive screen and the axis of the interphase arrester is the same;

Further, the sleeve also includes a sleeve support tube, the sleeve support tube includes an upper half support tube and a lower half support tube used in conjunction, the sleeve insulation core includes an upper half of the core protruding outside the base and a The lower half of the core inserted in the base, the upper half of the support tube is sleeved outside the upper half of the core and between the upper half of the core and the second valve plate of the phase-to-ground arrester, and the lower half of the support tube is sleeved Outside the bottom half of the core and inside the base.

Further, the phase-ground arrester also includes a lower equalizing ball, an upper equalizing ball, a second conductive block, a spring, an umbrella skirt, an upper flange and a lower flange, and the upper equalizing ball is arranged on the upper end of the phase-ground arrester and There is an opening in the upper equalizing ball for the conductor of the bushing to pass through, the upper end of the support tube of the phase-to-earth arrester is inserted in the upper equalizing ball, and the second conductive block is a ring-shaped conductive block, which is located in the upper equalizing ball and sleeved in the upper equalizing ball. At the upper end of the bushing, the spring is located in the support tube of the phase-ground arrester and between the second conductive block and the second valve plate of the phase-ground arrester. Connected with the base and the upper flange, the umbrella skirt is set outside the support tube of the phase-to-ground arrester and is located between the upper equalizing ball and the upper flange, and the lower equalizing ball is set at the lower end of the bushing and inserted in the lower half of the supporting tube In the lower end, the lower equalizing ball is provided with a lower equalizing ball opening through which the conductor of the bushing passes.

Further, the interphase arrester further includes a third conductive block, and the two third conductive blocks are respectively arranged in both ends of the support tube of the interphase arrester to press against the first valve plate of the interphase arrester.

Further, the three sets of bushings are A-phase bushings, B-phase bushings and C-phase bushings, and the three sets of bushings are arranged side by side along the radial direction of each bushing; the three sets of interphase arresters are respectively The first inter-phase arrester, the second inter-phase arrester and the third inter-phase arrester, the axial direction of the inter-phase arrester is perpendicular to the axial direction of the bushing, the two ends of the first inter-phase arrester are set close to the A-direction bushing and the lower end of the B-phase bushing respectively, and the second The two ends of the interphase arrester are arranged close to the lower ends of the phase B bushing and the phase C bushing respectively. The first interphase arrester and the second interphase arrester are on the same axis, and the three sets of bushings are located on the axis of the first interphase arrester and the second interphase arrester. The three-phase arrester is located on the lower side of the axis of the first inter-phase arrester and the second inter-phase arrester.

Further, the overvoltage protector also includes a first conductive part, a second conductive part and a third conductive part, three sets of interphase arresters are located between the first conductive part and the second conductive part, and the lower end of the conductor of the A-phase bushing 1. One end of the first interphase arrester close to the A-phase bushing is electrically connected to one end of the first conductive member, the other end of the first conductive member is electrically connected to one end of the third interphase arrester, and the lower end of the conductor of the B-phase bushing passes through the third conductive member. The first interphase arrester and the second interphase arrester are electrically connected to one end close to the lower end of the B-phase bushing, the lower end of the conductor of the C-phase bushing, and the second interphase arrester near the lower end of the C-phase bushing are electrically connected to one end of the second conductive member. The other end of the three-phase inter-phase arrester is electrically connected to the other end of the second conductive member.

Further, the base includes a shell and an insulating medium filled in the shell, and the shell is electrically connected to the ground.

Further, the housing also includes a housing hole for injecting an insulating medium into it.

In the bushing type intelligent overvoltage protector of the present invention, the bushing, the phase-to-phase arrester and the phase-to-phase arrester all lead out wires, which can output signals for equipment detection, realize real-time monitoring of the working status of the three, and can find problems in time and solve the problem to ensure the reliable and stable operation of the overvoltage protector; in addition, the three sets of phase-to-ground arresters are arranged outside the base and respectively sleeved on the three sets of bushings, which improves the structural compactness of the overvoltage protector as a whole, The space requirement for the base is reduced.

In addition, the casing-type intelligent overvoltage protector of this embodiment has a reasonable and compact layout, which is beneficial to reducing the overall size of the base, and ensures a reasonable distance between the bushing components of each arrester and the arresters between phases.

In addition, the base adopts the structural form of shell + insulating medium, which is convenient for maintenance and replacement of the interphase arrester inside the base, and the insulation performance of the base can be guaranteed by means of replacing the insulating medium.

Description of drawings

Fig. 1 is the structural representation of bushing type intelligent overvoltage protector of the present invention;

Fig. 2 is a schematic diagram of the layout of the capacitive screen in the supporting tube of the phase-to-earth arrester of the present invention;

Fig. 3 is a schematic diagram of the layout of the capacitive screen in the supporting tube of the interphase arrester of the present invention;

Fig. 4 is a schematic circuit diagram of the bushing type intelligent overvoltage protector of the present invention.

Explanation of reference signs

The first phase-ground arrester 1a; the second phase-ground arrester 1b; the third phase-ground arrester 1c; conductor 100; bushing insulating core 101; first wire 1010; Pressure ball 104; upper equalizing ball 110; second conductive block 111; spring 112; A-phase bushing 2a; B-phase bushing 2b; C-phase bushing 2c; the first interphase arrester ab; the second interphase arrester bc; the third interphase arrester ac; A valve plate; 22 third conductive block; shell 3; shell hole 30; insulating medium 4; first conductive element 50; second conductive element 51; third conductive element 6.

Detailed ways

The specific implementation manner of the bushing type intelligent overvoltage protector of the present invention will be further described below with reference to the embodiments given in the accompanying drawings. The bushing type intelligent overvoltage protector of the present invention is not limited to the description of the following embodiments.

As shown in Figures 1-4, it is a bushing type intelligent overvoltage protector of the present invention, which includes a base, three sets of arrester sleeve assemblies and three sets of interphase arresters arranged in the base; the arrester sleeve assembly and the base Fixedly connected, the arrester bushing assembly includes a bushing and a lightning arrester, one end of the bushing is inserted in the base, the other end is located outside the base, and the phase-to-ground arrester is set outside the base and sleeved outside the bushing; the bushing includes a conductor 100 And the bushing insulating core 101 wrapped on the outside of the conductor 100, the bushing insulating core 101 includes a plurality of capacitive screens alternately arranged with insulating layers, the innermost and outermost capacitive screens are respectively connected to the high-voltage power supply and the ground phase electric connected, the capacitive screen between the innermost layer and the outermost layer leads out the first wire 1010, preferably the first wire 1010 is drawn out through the capacitive screen of the second outer layer, and is used for outputting signals to carry out equipment detection (such as partial discharge detection, Harmonic monitoring, resistive current monitoring, discharge times, etc.); the phase-ground arrester includes a phase-ground arrester support tube 114 and a plurality of ring-shaped second valve plates 115 stacked in the phase-ground arrester support tube 114, each first The two valve plates 115 are stacked in sequence along the axial direction of the phase-to-ground arrester and sleeved outside the corresponding casing. Preferably, the support tube 114 of the phase-to-ground arrester includes a plurality of capacitive screens alternately arranged with insulating layers, and the capacitors of the innermost layer and the outermost layer The screen is electrically connected to the high-voltage power supply and the ground phase respectively. The capacitive screen between the innermost layer and the outermost layer leads to the second wire 1140, preferably through the second outer layer of the capacitive screen. The second wire 1140 is used to output signals to the outside Perform equipment detection (such as partial discharge detection, harmonic monitoring, resistive current monitoring, discharge times, etc.); one end of the three groups of conductors 100 is respectively connected to the three-phase electrical connection for the high-voltage power supply, and the other ends are respectively passed through a group of phase grounds. The arrester is electrically connected to the ground phase; a group of interphase arresters is connected in series between any two groups of the conductors 100; the interphase arrester includes an interphase arrester support tube 20 and a plurality of first valve plates stacked in the interphase arrester support tube 20 21. Each first valve plate 21 is stacked together in sequence along the axial direction of the interphase arrester. The support tube 20 of the interphase arrester includes a plurality of capacitive screens alternately arranged with insulating layers. The innermost and outermost capacitive screens are respectively connected to the high voltage power supply It is electrically connected to the ground phase, and the capacitive screen between the innermost layer and the outermost layer leads to the third wire 200, for example, the third wire 200 can be drawn out through the capacitive screen of the second outer layer for external output signals for device detection ( Such as partial discharge detection, harmonic monitoring, resistive current monitoring, discharge times, etc.).

The bushing type intelligent overvoltage protector of the present invention, the bushing, the phase-to-phase arrester and the phase-to-phase arrester all lead out wires, which can output signals to the outside for equipment detection, realize real-time monitoring of the working status of the three, and can find problems in time and solve them. solution to ensure the reliable and stable operation of the overvoltage protector; in addition, the three sets of phase-to-ground arresters are arranged outside the base and respectively sleeved on the three sets of bushings, which improves the structural compactness of the overvoltage protector as a whole and reduces The space requirement for the base.

As shown in Figure 1, in the bushing type intelligent overvoltage protector of this embodiment, the three sets of bushings are A-phase bushing 2a, B-phase bushing 2b and C-phase bushing 2c, and the three sets of phase-to-ground arresters are respectively The first phase-to-ground surge arrester 1a, the second phase-to-ground surge arrester 1b and the third phase-to-ground surge arrester 1c, the three groups of inter-phase surge arresters are respectively the first phase-to-phase surge arrester ab, the second phase-to-phase surge arrester bc and the third phase-to-ground surge arrester ac; the first phase The ground arrester 1a is set outside the A-phase bushing 2a, and the A-phase of the high-voltage power supply passes through the conductor 100 of the A-phase bushing 2a in turn, and the first phase ground arrester 1a is electrically connected to the ground phase, and the second phase ground arrester 1b is set in the Outside the B-phase bushing 2b, the B-phase of the high-voltage power supply is electrically connected to the ground through the conductor 100 of the B-phase bushing 2b, the second phase ground arrester 1b, and the third phase ground arrester 1c is sleeved outside the C-phase bushing 2c , the C phase of the high voltage power supply is electrically connected to the ground phase through the conductor 100 of the C phase bushing 2c, and the third phase ground arrester 1c; the conductor 100 of the A phase bushing 2a and the B phase bushing 2b is connected in series The first interphase arrester ab, the second interphase arrester bc is connected in series between the conductors 100 of the B-phase bushing 2b and the C-phase bushing 2c, and the second inter-phase arrester bc is connected in series between the conductors 100 of the A-phase bushing 2a and the C-phase bushing 2c The third phase arrester ac.

As shown in Figure 1, it is a layout mode of the bushing type intelligent overvoltage protector of this embodiment:

The three sets of bushings are arranged side by side along the radial direction of each bushing at intervals, the axial direction of the interphase arrester is perpendicular to the axial direction of the bushing, that is, it is arranged parallel to the radial direction of the bushing, and the two phases of the first interphase arrester ab The two ends (both axial ends) of the second interphase surge arrester bc are respectively arranged close to the lower ends of the A-phase bushing 2a and the B-phase bushing 2b, and the two ends (axial ends) of the second interphase arrester bc are respectively close to the B-phase bushing 2b and the C-phase bushing The lower end of 2c is set, the first interphase arrester ab and the second interphase arrester bc are coaxial, the three sets of bushings are located on the upper side of the axis of the first interphase arrester ab and the second interphase arrester bc, and the third interphase arrester ac is located on the first interphase arrester ab and the lower side of the axis of the second interphase arrester bc. The casing-type intelligent overvoltage protector of this embodiment has a reasonable and compact layout, which is beneficial to reducing the overall size of the base, and ensures a reasonable distance between the bushing components of each arrester and the arresters between phases.

As shown in Figure 1, the bushing type intelligent overvoltage protector of this embodiment also includes a first conductive part 50, a second conductive part 51 and a third conductive part 6, and three sets of interphase arresters are located between the first conductive part 50 and the second conductive part 6. Between the conductive parts 51, the lower end of the conductor 100 of the A-phase bushing 2a and the end of the first interphase arrester ab close to the A-phase bushing 2a are respectively electrically connected to one end of the first conductive part 50, and the other end of the first conductive part 50 is connected to the third One end of the interphase arrester ac is electrically connected, the lower end of the conductor 100 of the B-phase bushing 2b is electrically connected to the end of the first interphase arrester ab and the second interphase arrester bc near the lower end of the B-phase bushing 2b through the third conductive member 6, and the C-phase bushing The lower end of the conductor 100 of 2c and the end of the second interphase arrester bc close to the lower end of the C-phase bushing 2c are electrically connected to one end of the second conductive member 51, and the other end of the third interphase arrester ac is electrically connected to the other end of the second conductive member 51. Further, the first conductive member 50 , the second conductive member 51 and the third conductive member 6 are all cut and bent from metal conductive plates. The first conductive member 50, the second conductive member 51 and the third conductive member 6 have a simple structure and easy connection, which simplifies the connection structure between each arrester bushing assembly and the interphase arrester assembly, and the connection operation is simple and the connection reliability is high.

As shown in Figure 1, the sleeve also includes a sleeve support tube, the sleeve support tube includes an upper half support tube 102 and a lower half support tube 103 used in conjunction, the sleeve insulation core 101 includes a protruding outside of the base The upper half of the core and the lower half of the core inserted in the base, the upper half of the support tube 102 is sleeved outside the upper half of the core and is located between the upper half of the core and the second valve plate 115 of the phase-to-ground arrester Between them, the lower half of the support tube 103 is sleeved outside the lower half of the core body and is located in the base, and the lower end of the upper half of the support tube 102 and the upper end of the lower half of the support tube 103 are relatively matched, and the two wrap the entire casing insulation core.

As shown in Figures 2 and 4, in the support tube 114 of the phase-to-earth arrester, each capacitive screen is arranged coaxially with the conductor 100 of the corresponding bushing and is all ring-shaped capacitive screens, from the innermost capacitive screen to the outermost The capacitive screens are offset to the side of the base one by one in a stepped shape, that is, the end of each capacitive screen away from the base, from the innermost layer to the outermost capacitive screen, is offset to the side of the base one by one in a stepped shape , and each capacitive screen is close to one end of the base, and the capacitive screen from the innermost layer to the outermost layer also shifts to the side of the base one by one in a stepped shape. Preferably, the phase-ground arrester support tube 114 includes a first intermediate capacitive screen located between the outermost and innermost capacitive screens, and at least one first intermediate capacitive screen includes a plurality of pieces arranged side by side along the phase-ground arrester axis The first sub-capacitive screens are set at intervals, and the radial distance between each first sub-capacitive screen and the conductor 100 of the corresponding bushing is the same, that is, each first sub-capacitive screen is an annular capacitive screen with the same radius, and the phase-to-ground arrester support tube All the capacitive screens of 114 form two capacitors connected in series between the high-voltage power supply and the ground phase and connected in parallel with the second valve plate group formed by the second valve plate 115. The two capacitors are respectively capacitor C0 and capacitor C1, and the second The wire 1140 is drawn from between the capacitor C0 and the capacitor C1. Certainly, as another embodiment, the first intermediate capacitive screen composed of a plurality of first sub-capacitive screens may not be arranged in the support tube 114 of the phase-to-ground arrester.

As shown in Figure 1, the phase-to-ground arrester also includes a lower equalizing ball 104, an upper equalizing ball 110, a second conductive block 111, a spring 112, an umbrella skirt 113, an upper flange 116 and a lower flange 117, and the upper equalizing ball The pressure ball 110 is arranged on the upper end of the phase-ground arrester and is provided with a pressure equalizing ball opening for the conductor 100 of the corresponding bushing to pass through. The upper end of the phase-ground arrester support tube 114 is inserted into the upper pressure equalizing ball 110. It is a ring-shaped conductive block, located in the upper pressure equalizing ball 110 and sleeved on the upper end of the corresponding sleeve. The spring is located in the phase-ground arrester support tube 114 and between the second conductive block 111 and the second valve plate 115 of the phase-ground arrester. Compress each second valve plate 115, the upper flange 116 is respectively connected with the phase-to-ground arrester support pipe 114 and the lower end of the upper half support pipe 102, the lower flange 117 is connected with the base and with the upper flange 116, and the umbrella skirt 113 is set Outside the support tube 114 of the phase-to-ground arrester and between the upper equalizing ball 110 and the upper flange 116, the lower equalizing ball 104 is arranged at the lower end of the corresponding bushing and inserted into the lower half support tube 103, and the lower equalizing ball 104 is set There is a lower equalizing ball opening for the conductor 100 of the corresponding bushing to pass through. Further, the lower flange 117 is fixedly connected with the shell 3 of the base.

As shown in Figures 3 and 4, the supporting tube 20 of the interphase arrester includes a first capacitive screen group, a second capacitive screen group and a third capacitive screen group, and the first capacitive screen group and the second capacitive screen group are along the axis of the interphase arrester. Arranged side by side, the third capacitive screen group is wrapped around the outside of the first capacitive screen group and the second capacitive screen group; in the first capacitive screen group, from the innermost capacitive screen to the outermost capacitive screen, in the form of Step-shaped offsets one by one to the side where the second capacitive screen group is located, that is, in the first capacitive screen group, each capacitive screen is far away from the end of the second capacitive screen group, from the innermost layer to the outermost capacitive screen, It is stepwise offset to the side close to the second capacitive screen group one by one, and each capacitive screen is close to one end of the second capacitive screen group, from the innermost layer to the outermost capacitive screen, it is stepwise closer to the second capacitive screen group The side where the screen group is located is offset; the first capacitive screen group includes a second intermediate capacitive screen located between the innermost and outermost capacitive screens, and at least one second intermediate capacitive screen includes a plurality of blocks along the interphase arrester axis To the second sub-capacitive screens arranged side by side at intervals, the radial distance between each second sub-capacitive screen and the axis of the interphase arrester is the same, that is, each second sub-capacitive screen is an annular capacitive screen with the same center and the same radius; The capacitive screens of the second capacitive screen group and the first capacitive screen group are symmetrical to each other. In the second capacitive screen group, from the innermost capacitive screen to the outermost capacitive screen, one by one to the second capacitive screen in a ladder shape The side where a capacitive screen group is located is offset; the first valve plate 21 of the interphase arrester forms the first valve plate group, and the innermost capacitive screens of the first capacitive screen group and the second capacitive screen group are respectively connected to the first valve plate group. All the capacitive screens of the interphase surge arrester support tube 20 form capacitor C2, capacitor C3 and capacitor C4, capacitor C2 and capacitor C3 are connected in parallel with the first valve plate group after being connected in series to bear high voltage, capacitor C2 and capacitor C2 The node between the capacitors C3 is electrically connected to the ground through the capacitor C4. Preferably, the node between the capacitors C2 and C3 leads to the third wire 200, and the capacitor C4 is used as a voltage dividing capacitor for monitoring, and plays the role of voltage dividing and monitoring. Of course, as another embodiment, the first capacitive screen group and the second capacitive screen group may not be provided with a second intermediate capacitive screen composed of a plurality of second sub-capacitive screens.

As shown in FIG. 3 , in the third capacitive screen group, both ends of each capacitive screen, from the innermost layer to the outermost layer of the capacitive screen, shrink toward the axial middle of the interphase arrester one by one in a stepped shape. Further, the two ends of the innermost capacitive screen of the third capacitive screen group are located between the two ends of the first capacitive screen group and the outermost capacitive screen of the second capacitive screen group in the axial direction of the interphase arrester. between.

As shown in FIG. 1 , the interphase arrester further includes a third conductive block 22 , and two third conductive blocks 22 are respectively arranged in both ends of the interphase arrester support tube 20 to press against the first valve plate 21 of the interphase arrester.

As shown in Figure 1, the base includes a casing 3 and an insulating medium 4 filled in the casing 3. The insulating medium 4 is filled with each bushing, each interphase arrester, and the gap between the bushing and the interphase arrester. The casing 3 and the ground Phase electric connection. Further, the housing 3 also includes a housing hole 30 for injecting the insulating medium 4 into it. The base adopts the structure form of shell 3 + insulating medium 4, which is convenient for maintenance and replacement of the interphase arrester inside the base, and the insulation performance of the base can be guaranteed by replacing the insulating medium 4.

It should be noted that, in the description of the present invention, the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer" etc. are based on those shown in the accompanying drawings The orientation or positional relationship, or the conventionally placed orientation or positional relationship in use, is only for convenience of description, and does not indicate that the referred device or element must have a specific orientation, so it should not be construed as a limitation of the present invention. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions, and should not be construed as indicating relative importance.

The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be assumed that the specific implementation of the present invention is limited to these descriptions. For those of ordinary skill in the technical field of the present invention, without departing from the concept of the present invention, some simple deduction or replacement can be made, which should be regarded as belonging to the protection scope of the present invention.

Claims (10)

1. The utility model provides a sleeve type intelligence overvoltage protection ware which characterized in that: the overvoltage protector comprises a base, three groups of lightning arrester sleeve assemblies and three groups of interphase lightning arresters arranged in the base;

the lightning arrester sleeve assembly comprises a sleeve and a phase-to-ground lightning arrester, one end of the sleeve is inserted into the base, the other end of the sleeve is positioned outside the base, and the phase-to-ground lightning arrester is arranged outside the base and sleeved outside the sleeve; the bushing comprises a conductor (100) and a bushing insulating core body (101) wrapped outside the conductor (100), the bushing insulating core body (101) comprises a plurality of capacitive screens alternately arranged with insulating layers, the capacitive screens of the innermost layer and the outermost layer are respectively electrically connected with a high-voltage power supply and the ground, and a first lead (1010) is led out from the capacitive screen between the innermost layer and the outermost layer; the phase-to-ground arrester comprises a phase-to-ground arrester supporting tube (114) and a plurality of annular second valve plates (115) which are arranged in the phase-to-ground arrester supporting tube (114) in a stacked mode, each second valve plate (115) is sleeved outside the sleeve, the phase-to-ground arrester supporting tube (114) comprises a plurality of capacitive screens which are alternately arranged with the insulating layer, the capacitive screen of the innermost layer is electrically connected with a high-voltage power supply, the capacitive screen of the outermost layer is electrically connected with the ground, and a second lead (1140) is led out from the capacitive screen between the innermost layer and the outermost layer; one end of each of the three groups of conductors (100) is respectively used for being electrically connected with three phases of high-voltage power supply, and the other end of each of the three groups of conductors is electrically connected with the ground through a group of phase-to-ground lightning arresters; a group of interphase lightning arresters are connected in series between any two groups of conductors (100);

the interphase arrester comprises an interphase arrester supporting tube (20) and a plurality of first valve plates (21) which are arranged in the interphase arrester supporting tube (20) in a stacked mode, the interphase arrester supporting tube (20) comprises a plurality of capacitive screens which are alternately arranged with an insulating layer, the capacitive screens of the innermost layer and the outermost layer are respectively electrically connected with a high-voltage power supply and the ground, and a third wire (200) is led out from the capacitive screens between the innermost layer and the outermost layer.

2. The telescopic intelligent overvoltage protector according to claim 1, wherein: the capacitive screen of the phase-to-ground arrester supporting tube (114) forms two capacitors which are connected in series between the high-voltage power supply and the ground phase, the two capacitors are connected in parallel with a second valve plate group formed by a second valve plate (115), and the two capacitors are a capacitor C0 and a capacitor C1 respectively.

3. The telescopic intelligent overvoltage protector according to claim 1 or 2, wherein: in the phase ground lightning arrester supporting tube (114), the capacitor screen at the innermost layer is offset to the capacitor screen at the outermost layer in a stepped manner one by one to the side of the base.

4. A telescopic intelligent overvoltage protector according to claim 3, wherein: the phase-to-earth arrester support tube (114) further comprises a first intermediate capacitive screen positioned between the capacitive screens of the outermost layer and the innermost layer of the support tube, and at least one first intermediate capacitive screen comprises a plurality of first sub-capacitive screens which are arranged at intervals side by side along the axial direction of the phase-to-earth arrester, and the radial distance between each first sub-capacitive screen and the conductor (100) of the corresponding sleeve is the same.

5. The telescopic intelligent overvoltage protector according to claim 1, wherein: the capacitor screen of the interphase lightning arrester supporting tube (20) forms a capacitor C2, a capacitor C3 and a capacitor C4, the capacitor C2 and the capacitor C3 are connected in series and then connected in parallel with a first valve plate group formed by a first valve plate (21) of the interphase lightning arrester, and a node between the capacitor C2 and the capacitor C3 is electrically connected with the ground through the capacitor C4.

6. The telescopic intelligent overvoltage protector according to claim 1 or 5, wherein: the interphase lightning arrester supporting tube (20) comprises a first capacitance screen group, a second capacitance screen group and a third capacitance screen group, the first capacitance screen group and the second capacitance screen group are arranged side by side along the axial direction of the interphase lightning arrester, and the third capacitance screen group is wrapped outside the first capacitance screen group and the second capacitance screen group;

in the first capacitive screen group, the capacitive screens at the innermost layer are offset to the capacitive screens at the outermost layer from one another in a stepped manner one by one towards the side where the second capacitive screen group is located, and the capacitive screens of the second capacitive screen group and the first capacitive screen group are of symmetrical structures; the innermost capacitive screens of the first capacitive screen group and the second capacitive screen group are respectively electrically connected with two axial ends of a first valve plate group formed by first valve plates (21) of the interphase lightning arrester.

7. The telescopic intelligent overvoltage protector according to claim 6, wherein: in the third capacitive screen group, two ends of each capacitive screen are contracted from the innermost capacitive screen to the outermost capacitive screen in a stepped mode to the axial middle of the interphase lightning arrester one by one; and/or the first capacitive screen group comprises second intermediate capacitive screens positioned between the innermost capacitive screens and the outermost capacitive screens, at least one second intermediate capacitive screen comprises a plurality of second sub capacitive screens which are arranged at intervals side by side along the axial direction of the interphase lightning arrester, and the radial distance between each second sub capacitive screen and the axial direction of the interphase lightning arrester is the same.

8. The telescopic intelligent overvoltage protector according to claim 1, wherein: the bushing further comprises a bushing supporting tube, the bushing supporting tube comprises an upper half supporting tube (102) and a lower half supporting tube (103) which are matched, the bushing insulating core (101) comprises an upper core half section protruding outside the base and a lower core half section inserted in the base, the upper half supporting tube (102) is sleeved outside the upper core half section and located between the upper core half section and a second valve plate (115) of the phase-to-ground lightning arrester, and the lower half supporting tube (103) is sleeved outside the lower core half section and located in the base.

9. The telescopic intelligent overvoltage protector according to claim 8, wherein: the lightning arrester is characterized by further comprising a lower voltage equalizing ball (104), an upper voltage equalizing ball (110), a second conductive block (111), a spring (112), an umbrella skirt (113), an upper flange (116) and a lower flange (117), wherein the upper voltage equalizing ball (110) is arranged at the upper end of the lightning arrester and is provided with an upper voltage equalizing ball opening through which a sheathed conductor (100) passes, the upper end of the supporting tube (114) of the lightning arrester is inserted into the upper voltage equalizing ball (110), the second conductive block (111) is an annular conductive block, is positioned in the upper voltage equalizing ball (110) and is sleeved at the upper end of a sleeve, the spring (112) is positioned in the supporting tube (114) of the lightning arrester and is positioned between the second conductive block (111) and the second valve plate (115) of the lightning arrester, the upper flange (116) is connected with the lower end of the supporting tube (114) of the lightning arrester respectively, the lower flange (117) is connected with a base and is connected with the upper flange (116), the skirt (113) is sleeved outside the supporting tube (114) of the lightning arrester and is positioned between the upper voltage equalizing ball (110) and the upper end of the sleeve, and the lower end of the sleeve (103) is arranged at the lower end of the lightning arrester, and the sleeve passes through the upper end of the supporting tube (103) of the lightning arrester.

10. The telescopic intelligent overvoltage protector according to claim 1, wherein: the interphase lightning arrester further comprises third conductive blocks (22), and the two third conductive blocks (22) are respectively arranged at two ends of the interphase lightning arrester supporting tube (20) and press first valve plates (21) of the interphase lightning arrester;

the three groups of the sleeves are respectively an A-phase sleeve (2 a), a B-phase sleeve (2B) and a C-phase sleeve (2C), and the three groups of the sleeves are arranged at intervals side by side along the radial direction of each sleeve; the three groups of interphase arresters are respectively a first interphase arrestor (ab), a second interphase arrestor (bc) and a third interphase arrestor (ac), the axial direction of the interphase arrestor is perpendicular to the axial direction of the sleeve, two ends of the first interphase arrestor (ab) are respectively close to the lower ends of the A-phase sleeve (2 a) and the B-phase sleeve (2B), two ends of the second interphase arrestor (bc) are respectively close to the lower ends of the B-phase sleeve (2B) and the C-phase sleeve (2C), the first interphase arrestor (ab) and the second interphase arrestor (bc) are coaxial, the three groups of sleeves are positioned on the upper sides of the axes of the first interphase arrestor (ab) and the second interphase arrestor (bc), and the third interphase arrestor (ac) is positioned on the lower sides of the axes of the first interphase arrestor (ab) and the second interphase arrestor (bc);

the overvoltage protector further comprises a first conductive piece (50), a second conductive piece (51) and a third conductive piece (6), three groups of interphase arresters are positioned between the first conductive piece (50) and the second conductive piece (51), the lower end of a conductor (100) of the phase A sleeve (2 a) and one end, close to the phase A sleeve (2 a), of the first interphase arrestor (ab) are respectively electrically connected with one end of the first conductive piece (50), the other end of the first conductive piece (50) is electrically connected with one end of the third interphase arrestor (ac), the lower end of a conductor (100) of the phase B sleeve (2B) is electrically connected with one end of the first interphase arrestor (ab) and one end, close to the lower end of the phase B sleeve (2B), of the conductor (100) of the phase C sleeve (2C) and one end, close to the lower end of the phase C sleeve (2C), of the other end, of the second interphase arrestor (bc) is electrically connected with one end of the second conductive piece (51);

the base comprises a shell (3) and an insulating medium (4) filled in the shell (3), and the shell (3) is electrically connected with the ground;

the housing (3) further comprises a housing hole (30) for injecting an insulating medium (4) therein.