Supporting device for mounting surge capacitor and surge protection device

Abstract

The utility model relates to a supporting device for installing a surge capacitor and a surge protection device. The supporting device for installing the surge capacitor comprises a first layer device and a second layer device, wherein the first layer device comprises a single first insulating column; the first supporting platform is supported by the first insulating stand column; the second-layer device is stacked on the first-layer device and comprises a single second insulating stand column installed on the first supporting platform; the second supporting platform is supported by the second insulating stand column; wherein a plurality of capacitors are arranged on the first supporting platform and the second supporting platform at intervals and are connected through cables.

Description

Technical Field

[0001] This utility model relates to the field of power system surge protection technology, and in particular to a support device for installing surge capacitors and a surge protection device. Background Technology

[0002] With the continuous development and expansion of power systems, the number of electrical equipment has increased significantly, and its complexity has also grown. During the operation of power systems, events such as switching operations of electrical equipment, short-circuit faults, and lightning strikes can generate transient inrush voltages and currents. These surge phenomena pose a serious threat to the normal operation and service life of electrical equipment; therefore, taking effective surge protection measures is particularly important. Surge capacitors, as a key surge protection device, can effectively absorb and suppress surge energy, thereby protecting electrical equipment from damage. The increasing demand for their application has driven the continuous development of frame-mounted surge capacitor technology.

[0003] In traditional technologies, surge capacitors are typically supported using a multi-column frame structure, a design with significant drawbacks. First, the multi-column structure results in higher costs and occupies a large amount of space, leading to low space utilization. Second, the construction process is complex, cumbersome, and inefficient, highlighting the obvious limitations of the structure.

[0004] Therefore, improving the frame mounting technology of surge capacitors to simplify the structure and enhance structural strength and overall stability is a demand within the industry. Summary of the Invention

[0005] The present invention aims to provide a support device for installing surge capacitors, which can at least solve some of the above-mentioned technical problems.

[0006] This invention also aims to provide a surge protection device that applies the above-described improved support device.

[0007] According to one aspect of the present invention, a support device for installing surge capacitors is provided, comprising: a first layer device including: a single first insulating column; a first support platform supported by the first insulating column; a second layer device stacked on the first layer device and including: a single second insulating column installed on the first support platform; a second support platform supported by the second insulating column; wherein a plurality of capacitors are arranged at intervals between each other on the first support platform and the second support platform and are connected by cables.

[0008] The surge capacitor support device provided in this solution is a single-column supported multi-layer surge capacitor frame device, with the frame structure simplified through optimization. This improved surge capacitor frame device offers numerous advantages, including easy installation, convenient maintenance, space saving, reduced footprint, and improved heat dissipation, significantly enhancing the applicability and economy of surge capacitors. This design not only meets the power system's requirements for efficient and reliable surge protection devices but also provides strong support for the long-term stable operation of power equipment.

[0009] In some embodiments, a damping pad is provided between each capacitor and the first or second support platform supporting it. By reasonably adding damping pads at key parts of the frame, the stability and safety of the surge capacitor mounting structure are significantly enhanced, and more reliable protection is provided for the surge capacitor, effectively reducing the potential risks from external impacts.

[0010] In some embodiments, each capacitor is mounted on the first support platform or the second support platform at opposite ends, and shock-absorbing pads are disposed between the capacitor and the respective support platform at these ends.

[0011] In some embodiments, the first support platform and the second support platform are each provided with a plurality of connecting plates at intervals, each connecting plate extends vertically, and each capacitor has connecting ears at its opposite ends, with each capacitor's two connecting ears connected to the corresponding connecting plate.

[0012] In some embodiments, the first support platform includes two first crossbeams that are parallel to each other and spaced apart, and capacitors of this layer are each spanned across and mounted on the two first crossbeams; the second support platform includes two second crossbeams that are parallel to each other and spaced apart, and capacitors of this layer are each spanned across and mounted on the two second crossbeams.

[0013] In some embodiments, the first beam and the second beam each include a vertical first sidewall and two second sidewalls angled to the upper and lower ends of the first sidewall, the first insulating post is connected to the lower second sidewall of the first beam, and the second insulating post is connected between the upper second sidewall of the first beam and the lower second sidewall of the second beam.

[0014] In some embodiments, the first insulating post and the second insulating post are aligned vertically, and the diameter of the first insulating post is larger than the diameter of the second insulating post.

[0015] In some embodiments, cable connectors are connected at an angle to one end of the first support platform and the other end of the second support platform, respectively. The cables are sequentially connected to the capacitors of the first layer device and the second layer device, and are connected at both ends to the cable connectors of the first support platform and the cable connectors of the second support platform, respectively.

[0016] In some embodiments, insulating posts are provided between the first support platform and its cable connector, and between the second support platform and its cable connector, respectively.

[0017] According to another aspect of the present invention, a surge protection device is provided, comprising the aforementioned support device for mounting surge capacitors and a plurality of surge capacitors mounted on the support device.

[0018] Other features and advantages of this invention will partly be apparent to those skilled in the art upon reading this application, and partly will be described below in conjunction with the accompanying drawings in the detailed description. Attached Figure Description

[0019] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings, wherein:

[0020] Figure 1 This is a front view of a surge protection device according to an embodiment of the present invention;

[0021] Figure 2 yes Figure 1 Enlarged view of point A;

[0022] Figure 3 This is a right view of a surge protection device according to an embodiment of the present invention;

[0023] Figure 4 yes Figure 3 Enlarged view of point B;

[0024] Figure 5 This is a left view of a surge protection device according to an embodiment of the present invention.

[0025] Explanation of reference numerals in the attached figures

[0026] 1-Surge protection device; 10-First layer device; 100-Second layer device; 2-First insulating column; 21-First umbrella skirt; 22-Second umbrella skirt; 23-First bottom connector; 24-First top connector; 3-Second insulating column; 31-Third umbrella skirt; 32-Fourth umbrella skirt; 33-Second bottom connector; 34-Second top connector; 41-First crossbeam; 413-First end plate; 414-First connecting plate; 415-First isolation column; 42-Second crossbeam; 423-Second end plate; 424-Second connecting plate; 425-Second isolation column; 43-First side wall; 44-Second side wall; 45-First cable connector; 46-Second cable connector; 5-Cable; 6-Shock-absorbing pad; 7-Surge capacitor; 71-Connecting lug; 711-Bottom wall; 712-Side wall Detailed Implementation

[0027] The schematic solutions of the technical solutions disclosed in this utility model are now described in detail with reference to the accompanying drawings. Although the drawings are provided to illustrate some embodiments of this utility model, the drawings are not necessarily drawn to the dimensions of the specific embodiments, and certain features may be enlarged, removed, or partially cut to better illustrate and explain the disclosure of this utility model. Some components in the drawings may be repositioned according to actual needs without affecting the technical effect. The phrase "in the drawings" or similar terms appearing in the specification do not necessarily refer to all drawings or examples.

[0028] Certain directional terms used in the description of the accompanying drawings below, such as “inner,” “outer,” “above,” “below,” and other directional terms, will be understood to have their normal meaning and refer to those directions as normally viewed in the accompanying drawings. Unless otherwise specified, the directional terms used in this specification are generally in accordance with the conventional directions understood by those skilled in the art.

[0029] The terms “first,” “first,” “second,” “second,” and similar terms used in this utility model do not indicate any order, quantity, or importance, but are used to distinguish one component from other components.

[0030] Figures 1 to 5 An exemplary surge protection device 1 according to the present invention is shown, which includes a surge capacitor support device constructed as a multi-layered frame supported by a single column, and the frame structure of the support device is simplified through optimization. This multi-layered design and optimized arrangement can effectively reduce the footprint of the surge protection device 1, while ensuring that heat dissipation and maintenance are not affected.

[0031] As shown in the figure, the surge protection device 1 includes two layers, namely the first layer device 10 below and the second layer device 100 stacked on the first layer device.

[0032] The first-layer device 10 includes a first support platform and a first insulating column 2 supporting the first support platform. The first insulating column 2 is designed as a single column. In other words, there is one and only one first insulating column 2 to support the first support platform and the second-layer device on it. This eliminates the need for multiple columns that would normally be arranged around the perimeter of the first layer. The single first insulating column 2 is installed at the center of gravity of the entire structure of the first support platform and the second-layer device 100, which can prevent the structure supported by the first insulating column 2 from tilting and ensure the stable operation of the surge protection device 1.

[0033] In one embodiment, the first insulating post 2 includes an insulating core and an outer cladding surrounding the insulating core, wherein the outer cladding is configured with a plurality of skirts arranged axially along the insulating core. These skirts may have a uniform diameter or different diameters and be arranged at regular intervals. As shown in the figure, in this embodiment, the skirts include a first skirt 21 and a second skirt 22, wherein the diameter of the first skirt 21 is larger than the diameter of the second skirt 22. The plurality of first skirts 21 and the plurality of second skirts 22 are arranged such that a second skirt 22 is sandwiched between two first skirts 21, and a first skirt 21 is sandwiched between two second skirts 22. The first insulating post 2 is connected at its bottom end to other components of the electrical equipment via a first metal bottom connector 23, and at its top end to a first support platform via a first metal top connector 24.

[0034] A first support platform extends horizontally and supports multiple surge capacitors 7 for this layer. The first support platform can have various configurations, such as a horizontally laid-out plate or a beam along the horizontal direction. In the illustrated embodiment, the first support platform includes two horizontally arranged first beams 41, parallel to each other and opposite to each other, with each surge capacitor 7 mounted across these two first beams 41. Figure 1 Using the indicated orientation as a reference, the left end of the first crossbeam 41 is designated as its first end, and the right end of the first crossbeam 41 is designated as its second end. The first insulating column 2 can be connected to the first crossbeam 41, approximately near the middle, between the first and second ends.

[0035] First end plates 413 are respectively provided at the first and second ends of the first crossbeam 41. These first end plates 413 can serve as the mounting base for other components to be connected to the first crossbeam 41. For example... Figure 1As shown, a first end plate 413 at the second end of the first crossbeam 41 is connected to a first isolation post 415. This first isolation post 415 can refer to the configuration of the first insulating post 2, but its overall dimensions (including axial height and outer diameter) can be smaller than the overall dimensions of the first insulating post 2. A first cable connector 45 is connected to the end of the first isolation post 415 away from the first crossbeam 41. The first cable connector 45 is angled to the first crossbeam 41, for example, perpendicular to the first crossbeam 41. Furthermore, the orientation of the first cable connector 45 can be approximately the same as the orientation of the terminals of the surge capacitor 7 to be connected in the first layer device 10, so that the cable 5 can be connected from the terminals of the surge capacitor 7 to the end of the first cable connector 45 away from the first crossbeam 41. The first cable connector 45 may include two sections connected at an angle (e.g., 90 degrees), one section abutting and connected to the first isolation post 415.

[0036] A second-layer device 100 is mounted on the first-layer device 10. The second-layer device 100 includes a second support platform and a second insulating column 3 supporting the second support platform, wherein the second insulating column 3 is mounted on the first support platform. Similar to the first-layer device 10, the second insulating column 3 of the second-layer device 100 is also designed as a single column. In other words, there is one and only one second insulating column 3 to support the second support platform and the multiple surge capacitors 7 on it. This eliminates the need for multiple columns originally arranged around the perimeter of the second layer. The single second insulating column 3 can be installed corresponding to the center of gravity of the second support platform, preventing structural tilting supported by the second insulating column 3 and ensuring the stable operation of the surge protection device 1.

[0037] In one embodiment, the second insulating post 3 includes an insulating core and an outer cladding surrounding the insulating core, wherein the outer cladding is configured with a plurality of skirts arranged axially along the insulating core. These skirts may have a uniform diameter or different diameters arranged at regular intervals. As shown in the figure, in this embodiment, the skirts include a third skirt 31 and a fourth skirt 32, wherein the diameter of the third skirt 31 is larger than the diameter of the fourth skirt 32. The plurality of third skirts 31 and the plurality of fourth skirts 32 are arranged such that a fourth skirt 32 is sandwiched between two third skirts 31, and a third skirt 31 is sandwiched between two fourth skirts 32. The second insulating post 3 is connected to the first support platform at its bottom end via a second metal bottom connector 33, and to the second support platform at its top end via a second metal top connector 34. The overall dimensions (including axial height and outer diameter) of the skirts of the second insulating post 3 may be smaller than the overall dimensions of the first insulating post 2. For example, the diameter of the third skirt 31 of the second insulating post 3 can be significantly smaller than the diameter of the first skirt 21 and the second skirt 22 of the first insulating post 2.

[0038] The second support platform extends horizontally and supports multiple surge capacitors 7 for this layer. The second support platform can have various configurations, such as a horizontally laid-out plate or a beam along the horizontal direction. In the illustrated embodiment, the second support platform includes two horizontally arranged second beams 42, parallel to each other and opposite to each other, with each surge capacitor 7 mounted across these two second beams 42. Figure 1 Using the indicated orientation as a reference, the left end of the second crossbeam 42 is designated as its first end, and the right end of the second crossbeam 42 is designated as its second end. The second insulating column 3 can be connected to the second crossbeam 42, approximately near the middle, between the first and second ends.

[0039] Second end plates 423 are respectively provided at the first and second ends of the second crossbeam 42. These second end plates 423 can serve as the mounting base for other components to be connected to the second crossbeam 42. For example... Figure 1 As shown, a second end plate 423 at the first end of the second crossbeam 42 is connected to a second isolation post 425. This second isolation post 425 can be configured similarly to the first isolation post 415. A second cable connector 46 is connected to the end of the second isolation post 425 remote from the second crossbeam 42. The second cable connector 46 is angled to the second crossbeam 42, for example, perpendicular to it. Furthermore, the orientation of the second cable connector 46 can be approximately the same as the orientation of the terminals of the surge capacitor 7 to be connected in the second layer device 100, allowing the cable 5 to be connected from the terminals of the surge capacitor 7 to the end of the second cable connector 46 remote from the second crossbeam 42. The second cable connector 46 may include two sections connected at an angle (e.g., 90 degrees), one section abutting against and connected to the second isolation post 425.

[0040] The single-column support structure frame of the first-layer device 10 and the second-layer device 100 is stable and can effectively support and protect the capacitor bank. It has many advantages, such as easy installation, improved maintenance quality and efficiency, reduced footprint and efficient heat dissipation.

[0041] Figure 4The configuration of the second crossbeam 42 is illustrated, and the configuration of the first crossbeam 41 may be the same as or similar to that of the second crossbeam 42. As shown, the second crossbeam 42 can be constructed in a generally "U" shape, including a vertical first sidewall 43 and two second sidewalls 44 connected at an angle to the upper and lower ends of the first sidewall 43. In the second support platform, the first sidewalls 43 of the two "U"-shaped second crossbeams 42 can be close to each other, and the second sidewalls 44 of the two second crossbeams 42 can be far apart from each other, thus forming a "back-to-back" arrangement of the two second crossbeams 42. The arrangement of the two first crossbeams 41 in the first support platform can be similar to the arrangement of the two second crossbeams 42 in the second support platform. Thus, the first top connector 24 of the first insulating column 2 can be connected to the lower second side wall 44 of the first crossbeam 41, the second bottom connector 33 of the second insulating column 3 can be connected to the upper second side wall 44 of the first crossbeam 41, and the second top connector 34 of the second insulating column 3 can be connected to the lower second side wall 44 of the second crossbeam 42.

[0042] Multiple surge capacitors 7 are installed on the first and second support platforms, respectively, and are connected by cables 5. The figure shows two surge capacitors 7 installed on each layer, located on opposite sides of the first insulating post 2 or the second insulating post 3. The surge capacitor 7 is a device used to absorb and suppress transient overvoltages. Structurally, the surge capacitor 7 includes a robust housing made of non-conductive material and a capacitor element encapsulated within the housing. To prevent damage to the surge capacitor under high current surges, overvoltage protection, overcurrent protection, and short-circuit protection devices are also provided for the surge capacitor 7.

[0043] The surge capacitors 7 in the first and second support platforms are arranged at intervals. Each surge capacitor 7 is connected to the corresponding support platform at its opposite ends. Figure 1 As shown, each surge capacitor 7 has connecting lugs 71 protruding from the housing at opposite ends. These lugs can be U-shaped structures, including a vertical bottom wall 711 and two side walls 712 connected to the upper and lower sides of the bottom wall 711. Correspondingly, a first crossbeam 41 has a plurality of first connecting plates 414 arranged longitudinally, while a second crossbeam 42 has a plurality of second connecting plates 424 arranged longitudinally. These connecting plates 414 extend vertically from their respective crossbeams and are connected to the bottom wall 711 of the corresponding connecting lug 71 of the respective surge capacitor 7, for example, by detachable connectors such as bolts. Thus, each surge connector 7 is connected to its respective support platform at opposite ends.

[0044] To reduce the potential risks from external impacts and provide reliable protection for surge capacitors, damping pads 6 are provided between surge capacitors 7 and their respective support platforms. In one embodiment, the damping pads 6 are positioned between the end of the surge capacitor 7 where the connecting lug 71 is located and the corresponding first crossbeam 41 or second crossbeam 42, thereby effectively creating a damping effect at critical locations. The damping pads 6 may include two sections connected at an angle, one section being sandwiched between the bottom surface of the surge capacitor 7 and the corresponding first crossbeam 41 or second crossbeam 42, and the other section abutting against the side of the surge capacitor 7, providing stable protection for the surge capacitor 7.

[0045] The surge capacitor 7 in surge protection device 1 is connected to the circuit via cable 5. As shown in the figure, cable 5 sequentially connects the surge capacitors 7 on the first support platform and the second support platform, with one end connected to the first cable connector 45 on the first support platform and the other end connected to the second cable connector 46 on the second support platform. Under normal voltage conditions, the surge capacitor 7 exhibits a high impedance state and does not affect the normal operation of the circuit. At this time, the surge capacitor 7 remains connected to the circuit, absorbing a small amount of current without significantly increasing power consumption. When a transient overvoltage (such as a lightning strike or switching overvoltage) occurs in the circuit, the surge capacitor 7 responds rapidly. The voltage across the surge capacitor 7 cannot change abruptly, so it immediately absorbs the surge energy and stores it as charge. This process can significantly reduce the amplitude and steepness of the surge voltage. The absorbed electrical energy is gradually released back into the circuit after the surge or safely dissipated through a grounding path. This energy absorption and release process can effectively protect sensitive equipment in the circuit from overvoltage damage. Once the surge disappears, surge capacitor 7 will automatically return to a high impedance state, waiting for the next surge to occur.

[0046] This utility model adopts a single-column supported multi-layer design and simplifies the frame structure of the surge capacitor through optimization, achieving advantages such as convenient installation and maintenance, ventilation and heat dissipation, and space saving.

[0047] It should be understood that although this specification describes various embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0048] The above description is merely an illustrative embodiment of this utility model and is not intended to limit the scope of this utility model. Any equivalent changes, modifications, and combinations made by those skilled in the art without departing from the concept and principles of this utility model should fall within the protection scope of this utility model.

Claims

1. A support device for mounting surge capacitors, characterized in that, include: The first layer of the device includes: Single first insulating post; The first support platform is supported by the first insulating column; The second layer device, stacked on top of the first layer device, includes: A single second insulating column is installed on the first support platform; The second support platform is supported by the second insulating column; Multiple surge capacitors are spaced apart from each other on the first support platform and the second support platform and are connected by cables.

2. The support device for installing surge capacitors according to claim 1, characterized in that, Each capacitor is provided with a shock-absorbing pad between itself and the first or second support platform supporting it.

3. The support device for installing surge capacitors according to claim 2, characterized in that, Each capacitor is mounted on the first support platform or the second support platform at opposite ends, and shock-absorbing pads are disposed between the capacitor and the corresponding support platform at these two ends.

4. The support device for installing surge capacitors according to claim 3, characterized in that, The first support platform and the second support platform are each provided with a plurality of connecting plates at intervals. Each connecting plate extends vertically, and each capacitor has connecting ears at its opposite ends. The two connecting ears of each capacitor are respectively connected to the corresponding connecting plates.

5. The support device for installing surge capacitors according to claim 1, characterized in that, The first support platform includes two parallel and spaced-apart first crossbeams, and the capacitors of this layer are each spanned across and mounted on the two first crossbeams; The second support platform includes two parallel and spaced-apart second beams, with each capacitor in this layer spanning and mounted on the two second beams.

6. The support device for installing surge capacitors according to claim 5, characterized in that, The first beam and the second beam each include a vertical first sidewall and two second sidewalls connected at an angle to the upper and lower ends of the first sidewall. The first insulating column is connected to the lower second sidewall of the first beam, while the second insulating column is connected between the upper second sidewall of the first beam and the lower second sidewall of the second beam.

7. The support device for installing surge capacitors according to claim 1, characterized in that, The first insulating post and the second insulating post are aligned vertically, and the diameter of the first insulating post is larger than the diameter of the second insulating post.

8. The support device for installing surge capacitors according to claim 1, characterized in that, Cable connectors are connected at an angle to one end of the first support platform and the other end of the second support platform. The cables are sequentially connected to the capacitors of the first layer device and the second layer device, and are connected at both ends to the cable connectors of the first support platform and the cable connectors of the second support platform, respectively.

9. The support device for installing surge capacitors according to claim 8, characterized in that, Insulating posts are provided between the first support platform and its cable connector, and between the second support platform and its cable connector.

10. A surge protection device, characterized in that, It includes a support device for mounting surge capacitors as described in any one of claims 1 to 9 and a plurality of surge capacitors mounted on the support device.

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