Multi-section capacitor type voltage transformer

Abstract

The invention relates to a multi-section capacitor type voltage transformer which comprises a capacitor and an oil tank. The capacitor comprises a first grading ring, a capacitance voltage dividing group, a second grading ring, a box body and a damping base which are sequentially connected from top to bottom. The capacitive voltage dividing group comprises a plurality of coaxially arranged sleeves, a third voltage equalizing ring is arranged between every two adjacent sleeves, and the box body is connected with an oil tank through a power cable; the damping base comprises a transition plate, a support and a damper set. According to the damping base of the multi-section capacitor voltage transformer, the support serves as a main bearing frame, the cushion block is installed in the middle of the top face of the top plate, continuous and large-area center supporting is provided, a core weight area of the transformer is supported, and a stable fulcrum is formed; the shock absorbers surrounding the cushion block can effectively absorb and isolate vibration and impact from all directions, and the shock absorbers cooperate with friction damping provided by the cushion block, so that the shock resistance of the multi-section capacitor voltage transformer is effectively improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of voltage transformers, in particular to a multi-section capacitor voltage transformer. BACKGROUND

[0002] The capacitor voltage transformer is a kind of voltage transformer for metering, relay protection, etc., which is obtained by dividing voltage through series capacitors, and then transforming and electrically isolating through electromagnetic units. The capacitor voltage transformer can also couple carrier frequency to transmission lines for long-distance communication, remote measurement, selective line high-frequency protection, remote control, teletype, etc.

[0003] The Chinese patent with publication number CN207558570U provides a multi-section voltage transformer convenient for adjusting error, which includes a capacitor and an electromagnetic device connected through a connecting line. The capacitor includes a plurality of capacitor voltage dividers with different diameters, a first voltage equalizing ring, a second voltage equalizing ring, and a base. The capacitor voltage dividers are connected in series according to the diameter from small to large to form a capacitor voltage divider group. The largest diameter end of the capacitor voltage divider group is fixedly arranged on the base. The first voltage equalizing ring is arranged at the smallest diameter end of the capacitor voltage divider group, and the second voltage equalizing ring is arranged at the connection between the capacitor voltage divider group and the base. The electromagnetic device includes an oil tank and an error adjustment terminal box arranged on the outer side wall of the oil tank. The error adjustment terminal box is provided with a ratio difference adjustment terminal plate and an angle difference adjustment terminal plate. The multi-section voltage transformer has the advantages of stable structure, easy assembly, and convenience for debugging. However, it has rigid connection and poor anti-seismic capability, and cannot be directly applied in earthquake-prone areas.

[0004] Therefore, the present application provides a multi-section capacitor voltage transformer to solve the above problems. SUMMARY

[0005] The technical problem to be solved by the present application is to provide a multi-section capacitor voltage transformer to improve the anti-seismic capability of the multi-section capacitor voltage transformer.

[0006] To solve the above technical problems, the technical solution of the present application is as follows: a multi-section capacitor voltage transformer, which has the following innovative points: it includes a capacitor and an oil tank. The capacitor includes a first voltage equalizing ring, a capacitor voltage divider group, a second voltage equalizing ring, a tank, and a shock-absorbing base connected in sequence from top to bottom. The capacitor voltage divider group includes a plurality of coaxially arranged sleeves. A third voltage equalizing ring is arranged between each adjacent two sleeves. The tank is connected with the oil tank through a power cable. The damping base comprises a transition plate, a support and a damping device group; the transition plate is horizontally installed at the bottom of the box body; the support is supported below the transition plate through a cushion block; the support comprises a top plate and a bottom plate; the bottom plate is horizontally arranged; the top plate is horizontally arranged above the bottom plate; the top plate is connected with the bottom plate through a support frame to form an integral whole; the cushion block is fixed to the middle part of the top surface of the top plate; the damping device group comprises four damping devices which are arranged around the cushion block; each damping device group comprises two damping devices; each damping device is fixedly installed on the top plate; and the top part of each damping device is connected with the transition plate.

[0007] Further, the support frame is arranged between the top plate and the bottom plate; the support frame comprises four support plate assemblies, namely two longitudinal support plate assemblies and two transverse support plate assemblies; the two longitudinal support plate assemblies are symmetrically arranged about the central axis of the support frame; the two transverse support plate assemblies are symmetrically arranged about the central axis of the support frame; and the two longitudinal support plate assemblies and the two transverse support plate assemblies cooperatively form a cross-shaped structure. The support plate assembly comprises two vertically arranged and mutually parallel right-angled trapezoidal plates; the right-angled waist of the right-angled trapezoidal plate is arranged on the inner side of the support frame; the top edge of the right-angled trapezoidal plate is connected with the bottom surface of the top plate; the bottom edge of the right-angled trapezoidal plate is connected with the top surface of the bottom plate; the two right-angled trapezoidal plates of each longitudinal support plate assembly are respectively connected with the right-angled trapezoidal plates on the same side of the two adjacent transverse support plate assemblies, and cooperatively form a cross-shaped damping cavity.

[0008] Further, the cushion block is arranged above the intersection of the cross-shaped damping cavity.

[0009] Further, the top plate, the bottom plate and the support frame cooperatively form four damping device installation spaces corresponding to the damping device groups; the four damping device installation spaces are located on the outer side of the support frame; four groups of installation hole groups are formed on the top plate; the installation hole groups correspond to the damping device groups; each installation hole group comprises two installation holes corresponding to the two damping devices of the corresponding damping device group; and the bottom part of the damping device of each damping device group passes through the installation hole and enters the damping device installation space.

[0010] Further, the center line of the two installation holes of each installation hole group on the top plate is a first line segment; the median line of the first line segment on the horizontal plane is a horizontal median line; the horizontal median lines of the installation hole groups are perpendicular to the central axis of the support frame; and the horizontal median lines of the adjacent two installation hole groups are perpendicular to each other.

[0011] The advantages of the present application are as follows: The multi-section capacitor voltage transformer of the application sets shock-absorbing bases at the bottom of capacitors, sets supports under the capacitors as main bearing frames, installs cushion blocks in the middle of the top surface of the top plate to provide continuous and large-area central support, supports the core weight area of the capacitor, forms stable support points, prevents the shock absorbers from aging or failing prematurely due to long-term bearing of excessive static compression, and the shock absorbers around the cushion blocks can effectively absorb and isolate vibrations and impacts from all directions in addition to auxiliary support, and cooperate with the friction damping provided by the cushion blocks to effectively improve the anti-shock capability of the multi-section capacitor voltage transformer.

[0012] The support frame of the application forms a cross-shaped structure through the cooperation of the right-angled trapezoidal plates of each support plate assembly, the structure is only rigidly connected in the top edge and bottom edge areas of each right-angled trapezoidal plate, and a cross-shaped shock-absorbing cavity is formed inside, which is equivalent to setting a buffer elastic area inside the rigid structure, which can absorb and dissipate part of the impact energy before the shock absorbers when the impact occurs, thereby reducing the instantaneous load of the upper shock absorbers and further improving the anti-shock capability of the transformer.

[0013] The cushion block of the application is arranged above the intersection of the cross-shaped shock-absorbing cavity, when the transformer is impacted, most of the impact load is transmitted to the outside of the shock absorber through the transition plate, and a small part is quickly guided to the intersection of the cross-shaped shock-absorbing cavity through the cushion block, which uses the cross-shaped shock-absorbing cavity to absorb high-frequency vibrations and improves the impact resistance.

[0014] The application installs four shock absorber groups in the four shock absorber mounting spaces formed on the outer side of the support frame, and the bottom of each shock absorber group passes through the mounting hole into the shock absorber mounting space, which not only effectively saves the installation space of the shock absorber, but also reduces the height of the box body, thereby reducing the height of the capacitor gravity center of the transformer and improving the stability.

[0015] The application optimizes the opening position of each mounting hole on the top plate, optimizes the installation position of each shock absorber, and fixes the regular octagonal structure distribution of the eight shock absorbers, which greatly increases the ability to resist overturning moments in all directions, even if a single shock absorber fails, the remaining seven shock absorbers can still form a stable support system, avoiding catastrophic overturning and improving reliability. BRIEF DESCRIPTION OF DRAWINGS

[0016] The application will be further described in detail below in combination with the drawings and specific embodiments.

[0017] Fig. 1 It is a structural schematic diagram of the multi-section capacitor voltage transformer of the application.

[0018] Fig. 2 It is a structural schematic diagram of the shock-absorbing base of the application.

[0019] Fig. 3 This is a schematic diagram of the top plate of the present invention. Detailed Implementation

[0020] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0021] Example This embodiment provides a multi-section capacitor voltage transformer, such as... Figs. 1-3 As shown, it includes a capacitor and an oil tank 1. The capacitor is vertically aligned along its central axis and comprises, from top to bottom, a first equalizing ring 7, a capacitor voltage divider group, a second equalizing ring 4, a housing 3, and a shock-absorbing base 2. The capacitor voltage divider group includes five coaxially arranged sleeves 5, with a third equalizing ring 6 between each pair of adjacent sleeves 5. The upper and lower sides of the third equalizing ring 6 are connected to the adjacent sleeves 5. The housing 3 is connected to the oil tank 1 via a power cable 8.

[0022] The shock-absorbing base 2 includes a transition plate 21, a bracket 22, and a shock absorber assembly 23. The transition plate 21 is horizontally installed at the bottom of the housing 3. The bracket 22 is supported below the transition plate 21 by pads 24. The bracket 22 includes a top plate 221 and a bottom plate 222. The bottom plate 222 is horizontally positioned, and the top plate 221 is horizontally positioned above the bottom plate 222. The top plate 221 is connected to the bottom plate 222 by a support frame 223 to form a whole.

[0023] The support frame 223 is arranged between the top plate 221 and the bottom plate 222, and comprises four support plate assemblies, two longitudinal support plate assemblies and two transverse support plate assemblies, the two longitudinal support plate assemblies are symmetrically arranged about the central axis of the support frame 22, the two transverse support plate assemblies are symmetrically arranged about the central axis of the support frame 22, and the two longitudinal support plate assemblies and the two transverse support plate assemblies cooperatively form a cross-shaped structure. Each support plate assembly comprises two vertically arranged and mutually parallel right-angled trapezoidal plates, the right-angled waist of the right-angled trapezoidal plate is arranged inside the support frame 22, the top edge of the right-angled trapezoidal plate is welded and connected to the bottom surface of the top plate 221, and the bottom edge of the right-angled trapezoidal plate is welded and connected to the top surface of the bottom plate 222, and the two right-angled trapezoidal plates of each longitudinal support plate assembly are respectively welded and connected to the right-angled trapezoidal plates on the same side of the two adjacent transverse support plate assemblies, and cooperatively form a cross-shaped damping cavity a. The support frame 223 forms a cross-shaped structure through the mutual cooperation of the right-angled trapezoidal plates of each support plate assembly, the structure is only rigidly connected in the top edge and bottom edge regions of each right-angled trapezoidal plate, and a buffering elastic region is formed inside the cross-shaped damping cavity a, which is equivalent to arranging a buffering elastic region inside the rigid structure, and when an impact occurs, a part of the impact energy can be absorbed and dissipated before the shock absorber, thereby reducing the instantaneous load of the upper shock absorber, and further improving the anti-shock capability of the transformer.

[0024] The cushion block 24 is arranged above the top plate 221 and is spot-welded and fixed to the top surface of the top plate 221 in the middle, and the cushion block 24 is arranged above the intersection of the cross-shaped damping cavity a. When the transformer is impacted, most of the impact load is transmitted to the shock absorber group 23 through the transition plate 21, and a small part of the impact load can be quickly guided to the intersection of the cross-shaped damping cavity a through the cushion block 24, and the cross-shaped damping cavity a is used to absorb high-frequency vibrations, thereby improving the impact resistance.

[0025] The shock absorber group 23 has four, and surrounds the cushion block 24, each shock absorber group 23 has two shock absorbers, the top plate 221, the bottom plate 222 and the support frame 223 cooperate to form four shock absorber mounting spaces b corresponding to the shock absorber group 23, four shock absorber mounting spaces b are located outside the support frame 223, four groups of mounting hole groups 2211 are opened on the top plate 221, the mounting hole group 2211 corresponds to the shock absorber group 23, each mounting hole group 2211 has two mounting holes corresponding to the two shock absorbers of the corresponding shock absorber group 23. The opening position of each mounting hole on the top plate is optimized in this embodiment, the center line of the two mounting holes of each mounting hole group 2211 on the top plate 221 is a first line segment, the perpendicular line of the first line segment on the horizontal plane is defined as a horizontal perpendicular line, the horizontal perpendicular line of each mounting hole group 2211 intersects the central axis of the support frame 22 perpendicularly, and the horizontal perpendicular lines of the adjacent two mounting hole groups 2211 are perpendicular to each other. The design makes the eight shock absorbers form a regular octagonal structure, greatly increases the ability to resist overturning moment in each direction, even if a single shock absorber fails, the remaining seven shock absorbers can still form a stable support system, avoiding catastrophic overturning and improving reliability.

[0026] The top of the shock absorber of each shock absorber group 23 is connected with the transition plate 21 through the first bolt, and the bottom passes through the mounting hole into the corresponding shock absorber mounting space b, each shock absorber is fixedly connected with the top plate 221 through the flange, the flange is installed on the upper part of the sidewall of the shock absorber, and the flange and the top plate 221 are connected through the second bolt. This mounting mode of the shock absorber not only can effectively save the installation space of the shock absorber, but also can reduce the height of the box body, thereby reducing the height of the capacitor gravity center of the mutual inductor and improving the stability.

[0027] The multi-section capacitor type voltage transformer sets the support frame 22 below the mutual inductor as the main bearing frame through the shock absorbing base 2 arranged at the bottom of the capacitor, the cushion block 24 is installed at the top surface of the top plate 221, provides continuous and large-area central support, supports the core weight area of the mutual inductor, forms a stable fulcrum, prevents the shock absorber from aging or failing prematurely due to long-term bearing of excessive static compression, and the shock absorber group 23 surrounding the cushion block can effectively absorb and isolate vibrations and impacts from all directions in addition to auxiliary support, and cooperates with the friction damping provided by the cushion block 24 to effectively improve the anti-seismic capability of the multi-section capacitor type voltage transformer.

[0028] The above merely describes the preferred embodiments of the present application, and is not intended to limit the present application in any form. Although the present application has been disclosed with the preferred embodiments as above, it is not intended to limit the present application. Any person skilled in the art can make some changes or modifications to the above disclosed technical content to obtain equivalent embodiments with equivalent changes, as long as the changes or modifications do not deviate from the technical solution of the present application. Any modification, change, equivalent change and modification of the above embodiments made according to the technical essence of the present application still belong to the scope of the technical solution of the present application.

Claims

1. A multi-section capacitive voltage transformer, characterized by: The capacitor and the oil tank are included. The capacitor includes a first equalizing ring, a capacitor voltage division group, a second equalizing ring, a tank body and a shock absorbing base connected in sequence from top to bottom; the capacitor voltage division group includes a plurality of coaxially arranged sleeves, a third equalizing ring is arranged between each adjacent two sleeves, and the tank body is connected with the oil tank through a power cable; The shock absorbing base includes a transition plate, a support and a shock absorber group; the transition plate is horizontally installed at the bottom of the tank body; the support is supported below the transition plate through a cushion block; the support includes a top plate and a bottom plate; the bottom plate is horizontally arranged, and the top plate is horizontally arranged above the bottom plate; the top plate is connected with the bottom plate through a support frame to form an integral whole; the cushion block is fixed to the middle part of the top surface of the top plate; the shock absorber group has four shock absorbers, which are arranged around the cushion block; each shock absorber group has two shock absorbers; each shock absorber is fixedly installed on the top plate; and the top of each shock absorber is connected with the transition plate.

2. The multi-section capacitive voltage transformer of claim 1, wherein: The support frame is arranged between the top plate and the bottom plate; the support frame includes four support plate assemblies, which are two longitudinal support plate assemblies and two transverse support plate assemblies; the two longitudinal support plate assemblies are symmetrically arranged about the central axis of the support; the two transverse support plate assemblies are symmetrically arranged about the central axis of the support; and the two longitudinal support plate assemblies and the two transverse support plate assemblies cooperatively form a cross-shaped structure. The support plate assembly includes two vertical and parallel right trapezoidal plates; the right angle waist of the right trapezoidal plate is arranged on the inner side of the support; the top edge of the right trapezoidal plate is connected with the bottom surface of the top plate; the bottom edge of the right trapezoidal plate is connected with the top surface of the bottom plate; the two right trapezoidal plates of each longitudinal support plate assembly are respectively connected with the same side right trapezoidal plates of the two adjacent transverse support plate assemblies on both sides, and cooperatively form a cross-shaped shock absorbing cavity.

3. The multi-section capacitive voltage transformer of claim 2, wherein: The cushion block is arranged above the intersection of the cross-shaped shock absorbing cavity.

4. The multi-section capacitive voltage transformer of claim 2, wherein: The top plate, the bottom plate and the support frame cooperatively form four shock absorber mounting spaces corresponding to the shock absorber groups; the four shock absorber mounting spaces are located on the outer side of the support frame; four groups of mounting hole groups are formed on the top plate; the mounting hole groups correspond to the shock absorber groups; each mounting hole group has two mounting holes corresponding to the two shock absorbers of the corresponding shock absorber group; the bottom of the shock absorber of each shock absorber group passes through the mounting hole and enters the shock absorber mounting space.

5. The multi-section capacitive voltage transformer of claim 4, wherein: The center line of the two mounting holes of each mounting hole group on the top plate is a first line segment; the perpendicular bisector of the first line segment on the horizontal plane is a horizontal perpendicular bisector; the horizontal perpendicular bisectors of the mounting hole groups vertically intersect with the central axis of the support; and the horizontal perpendicular bisectors of the adjacent two mounting hole groups are perpendicular to each other.

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