Shock-resistant electric switch cabinet

Abstract

The invention relates to an anti-seismic electric switch cabinet, and belongs to the technical field of electric switch cabinets, the anti-seismic electric switch cabinet comprises a cabinet body and a base, the base comprises an upper fixing part and a lower fixing part, the upper fixing part is connected with the cabinet body, the lower fixing part is fixedly mounted on the ground, the upper fixing part is provided with a first contact surface, and the first contact surface is provided with a second contact surface; the lower fixing part is provided with a first contact face, the lower fixing part is provided with a second contact face, and a damping layer is arranged between the first contact face and the second contact face and used for providing damping force when the first contact face and the second contact face generate relative displacement in the horizontal direction. Clamping structures matched with each other are arranged on the side faces of the upper fixing piece and the lower fixing piece correspondingly and used for forming rigid connection in the vertical direction between the upper fixing piece and the lower fixing piece when the first contact face and the second contact face relatively move to the edges. The base is divided into two parts, and the two parts are flexibly connected through the damping layer, so that horizontal transverse vibration is effectively reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical switch cabinets, and particularly to an earthquake-resistant electrical switch cabinet. Background Art

[0002] As a core power distribution and control device in the power system, the electrical switch cabinet undertakes key functions such as power distribution, circuit protection, and equipment operation monitoring. Its stability is directly related to the safety of the power grid and the continuity of power consumption. The requirements for electrical switch cabinets are also different under different working conditions. For example, for electrical switch cabinets used on ships, since the ship is vulnerable to hull vibrations caused by water wave impacts on the water surface, under such frequent vibration conditions, ordinary electrical switch cabinets are very likely to have short circuits, fires, or even system paralysis due to defects in earthquake-resistant design, such as cabinet deformation, loosening of connecting parts, or displacement of internal components, resulting in significant economic losses and safety hazards.

[0003] In the prior art, there are also electrical switch cabinets with improved earthquake resistance. Usually, elastic support members are used as the base of the electrical switch cabinet, and the deformation range allowed by the elastic support members is used to absorb vibration energy. It mainly relies on the deformation material itself to reduce vibration, and the requirements for materials and losses are relatively high. Especially in a marine environment, not only are there minor vibrations, but when the wind and waves are large, the vibration will evolve into swaying. The elastic support members not only need to dampen vibration but also bear the role of pulling the entire cabinet to maintain stability, resulting in the inability to design a reasonable structure to achieve the two effects of earthquake resistance and anti-swaying. Because damping requires flexibility, and pulling the swaying cabinet to maintain stability requires rigidity, so the existing electrical switch cabinets with earthquake resistance still have certain defects. Summary of the Invention

[0004] In view of the above technical problems, the present invention proposes an earthquake-resistant electrical switch cabinet, which uses the method of combining damping and clamping to achieve the advantages of damping vibration during high-frequency small vibrations and maintaining stability during low-frequency swaying.

[0005] To achieve the above technical objectives, the present invention adopts the following technical solutions:

[0006] The present invention specifically relates to an earthquake-resistant electrical switch cabinet, including a cabinet body and a base. The base includes an upper fixing member and a lower fixing member. The upper fixing member is connected to the cabinet body, and the lower fixing member is fixedly installed on the ground. A first contact surface is provided on the upper fixing member, and a second contact surface is provided on the lower fixing member. A damping layer is provided between the first contact surface and the second contact surface for providing a damping force when the first contact surface and the second contact surface have relative displacement in the horizontal direction. Clamping structures that cooperate with each other are provided on the sides of the upper fixing member and the lower fixing member for forming a rigid connection in the vertical direction between the upper fixing member and the lower fixing member when the first contact surface and the second contact surface are displaced to the edge.

[0007] Preferably, the upper fixing member includes a top plate, the bottom of the top plate is the first contact surface, the lower fixing member includes a support member, the top of the support member is the second contact surface, and the size of the first contact surface is larger than that of the second contact surface.

[0008] Preferably, both the first contact surface and the second contact surface are circular structures, and the damping layer is disposed on the surface of the first contact surface.

[0009] Preferably, the damping layer includes a first damping region and a second damping region, the damping force provided by the second damping region is greater than that of the first damping region, both the first damping region and the second damping region are circumferentially distributed around the center of the first contact surface, and the second damping region is distributed on one side of the first damping region away from the center.

[0010] Preferably, both the first damping region and the second damping region are a plurality of annular stripes protruding from the first contact surface, and the stripe density of the second damping region is greater than that of the first damping region.

[0011] Preferably, the upper fixing member further includes a first enclosing plate disposed around the edge of the top plate, the clamping structure includes a first insertion block and an inner slot, the inner slot is disposed on the side wall of the support member, and the first insertion block is disposed on the first enclosing plate, so that when the first contact surface and the second contact surface are displaced relative to each other to the edge, the first insertion block is inserted into the inner slot.

[0012] Preferably, the lower fixing member further includes a second enclosing plate disposed around the edge of the support member, a second insertion block is installed on the second enclosing plate, and an outer slot is disposed on one side of the first enclosing plate away from the first insertion block, so that when the first contact surface and the second contact surface are displaced relative to each other to the edge, the second insertion block is inserted into the outer slot.

[0013] Preferably, the connection between the first enclosing plate and the top plate is detachable, and the connection between the second enclosing plate and the support member is detachable.

[0014] Preferably, anti-collision pads are disposed inside both the inner slot and the outer slot.

[0015] Preferably, the upper fixing member is connected to the bottom of the cabinet body through shock-absorbing bolts, and the lower fixing member is fixedly connected to the ground through expansion bolts.

[0016] In the present invention, the base is set into two parts, namely an upper fixing member and a lower fixing member. There is a space between the two fixing members where a certain relative displacement can occur. Then, by using the damping layer to provide resistance during the relative displacement, a soft connection between the two fixing members is realized, effectively reducing horizontal lateral vibrations. Moreover, the upper and lower fixing members can also form a rigid connection through the clamping structure on the side when the maximum relative displacement occurs, and can hold the cabinet body in the case of large shaking amplitude to prevent the cabinet body from tipping over.

[0017] The present invention also provides two different damping forces by setting the damping layer. During lateral vibration, the upper and lower fixing parts generate relative displacement with small amplitude and high frequency, and the damping force with relatively small intensity makes the displacement relatively smooth, so that this repeated displacement can be utilized to reduce the vibration of the lower fixing part. When the vibration changes to swinging, the upper and lower fixing parts generate large relative displacement. Before the displacement reaches the maximum distance each time, a larger damping force is provided, which can delay the timing when the relative displacement reaches the maximum, reducing both the shaking amplitude of the cabinet body itself and the collision between the upper and lower fixing parts during clamping. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are used to provide a further understanding of the present disclosure and form a part of the present disclosure. The schematic embodiments and descriptions thereof are used to explain the present disclosure and do not constitute an improper limitation to the present disclosure. In the drawings:

[0019] Figure 1 shows a schematic diagram of the overall structure of the earthquake-resistant electrical switch cabinet of the present invention.

[0020] Figure 2 shows a schematic diagram of the base structure of the present invention.

[0021] Figure 3 shows a schematic diagram of the contact part between the first contact surface and the second contact surface of the present invention.

[0022] Figure 4 shows a schematic diagram of the damping layer distribution structure of the present invention.

[0023] Figure 5 shows a schematic diagram of the upper and lower fixing parts of the present invention forming an upper and lower rigid connection.

[0024] Figure 6 shows a schematic diagram of the first enclosing plate and the second enclosing plate of the present invention.

[0025] In the figures: 1, cabinet body; 2, base; 3, upper fixing part; 4, lower fixing part; 5, shock-absorbing bolt; 6, expansion bolt; 7, top plate; 8, first enclosing plate; 9, support member; 10, second enclosing plate; 11, outer slot; 12, first plug; 13, inner slot; 14, second plug; 15, damping layer; 16, anti-collision pad; 17, first contact surface; 18, second contact surface; 19, first damping area; 20, second damping area. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention.

[0027] Accordingly, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0028] As Figure 1 shown, the present invention provides an earthquake-resistant electric switch cabinet, which includes a cabinet body 1 and a base 2. The base 2 includes an upper fixing member 3 and a lower fixing member 4. The upper fixing member 3 is connected to the cabinet body 1, and the lower fixing member 4 is fixedly installed on the ground. The upper fixing member 3 is connected to the bottom of the cabinet body 1 through shock-absorbing bolts 5, and the lower fixing member 4 is fixedly connected to the ground through expansion bolts 6. The base 2 is divided into two parts. The lower part is the lower fixing member 4 for rigidly fixing on the ground. The expansion bolts 6 facilitate opening holes in the ground and fixing the lower fixing member 4 on the ground after the holes are opened. The upper fixing member 3 is used to connect the cabinet body 1, and the shock-absorbing bolts 5 can also play a certain shock-absorbing effect. The shock-absorbing bolts 5 are mechanical connectors integrating shock-absorbing functions, and their structures generally include screws, rubber columns or shock-absorbing gaskets, and nuts. Since the shock-absorbing bolts 5 are widely used in the field of shock absorption and their structures all belong to the prior art, the specific principles will not be elaborated here.

[0029] As Figure 2 and Figure 3 shown, a first contact surface 17 is provided on the upper fixing member 3, a second contact surface 18 is provided on the lower fixing member 4, and a damping layer 15 is provided between the first contact surface 17 and the second contact surface 18 for providing a damping force when the first contact surface 17 and the second contact surface 18 have relative displacement in the horizontal direction. Clamping structures that cooperate with each other are provided on the sides of the upper fixing member 3 and the lower fixing member 4 for forming a rigid connection in the up-and-down direction between the upper fixing member 3 and the lower fixing member 4 when the first contact surface 17 and the second contact surface 18 are displaced to the edge. As can be seen from the above Figure 1 the base 2 is divided into upper and lower parts. In order to enable the base to achieve an earthquake-resistant effect, the upper fixing member 3 and the lower fixing member 4 are connected in a flexible manner, and the damping layer 15 between the two contact surfaces is used to reduce lateral vibration. However, in order not to be limited to the earthquake-resistant effect, as Figure 2 shown, the structure of the base 2 can also achieve the effect of preventing the cabinet body 1 from shaking. The following will take the use of this electric switch cabinet on a ship as the usage scenario. When the ship is hit by small waves and winds, the ship will generate lateral vibration due to lateral collision. The lower fixing member 4 is fixed to the ship's hull, so the vibration will be transmitted to the lower fixing member 4. The second contact surface 18 of the lower fixing member 4 can have relative displacement with the first contact surface 17 of the upper fixing member 3, and during the displacement process, it is resisted by the damping layer 15, thereby reducing the vibration.

[0030] However, ships do not only encounter vibration. When the wind and waves become stronger, the hull sways, causing the lower fixing member 4 and the upper fixing member 3 to have relatively large displacements. The first contact surface 17 and the second contact surface 18 cannot achieve infinite relative displacement, and there must be a maximum relative displacement. Therefore, as the vibration changes to swaying, the displacements of the lower fixing member 4 and the upper fixing member 3 also increase until the maximum relative displacement is reached. At this time, due to the existence of the clamping structure, the lower fixing member 4 and the upper fixing member 3 are clamped and become a rigid connection in the vertical direction. Even if the swaying amplitude increases, the cabinet 1 will sway with the hull. Because the upper and lower parts of the base 2 become rigid, the cabinet 1 will not be separated from the base 2, so it will not topple due to excessive force. This horizontal damping shock absorption is different from the traditional vertical elastic shock absorption method. In the traditional structure, if the cabinet 1 sways, the swaying tension will be transmitted to the elastic support member, resulting in fatigue of the elastic support member. However, in the present application, regarding the base 2, the tension will not directly act on the damping layer 15, which will not affect the subsequent shock absorption effect and reduce losses. The reason for not providing a reset structure between the upper fixing member 3 and the lower fixing member 4 is that in actual use, the vibration direction and swaying direction of the hull are random. Therefore, even if the upper fixing member 3 and the lower fixing member 4 have a small offset, during the next vibration, starting from the offset position, due to inertia or the vibration direction being opposite to the previous one, the offset will move in the direction opposite to the previous one. For example, during one vibration, the lower fixing member 4 and the upper fixing member 3 generate a leftward displacement. If it moves rightward next time, the reverse movement is completed. If it continues to move leftward, the lower fixing member 4 and the upper fixing member 3 will eventually reach the maximum displacement. If the subsequent leftward displacement continues, then the lower fixing member 4 and the upper fixing member 3 can be regarded as a whole. However, since the lower fixing member 4 and the upper fixing member 3 are only rigidly connected in the vertical direction at the maximum displacement, they are still separable in the horizontal direction. The lower fixing member 4 cannot move leftward, but the upper fixing member 3 will move rightward due to inertia, thereby realizing the separation of the two from the overall state, facilitating the next shock absorption use.

[0031] Such as Figure 3As shown in the figure, it is mentioned above that the first contact surface 17 and the second contact surface 18 cannot achieve infinite relative displacement, otherwise it will cause the cabinet body 1 to swing too much. Therefore, the displacement needs to be able to meet the shock absorption requirements without being too large to affect stability. The upper fixing member 3 includes a top plate 7, the bottom of the top plate 7 is the first contact surface 17, the lower fixing member 4 includes a support member 9, the top of the support member 9 is the second contact surface 18, the size of the first contact surface 17 is larger than that of the second contact surface 18, and the part where the size of the first contact surface 17 is larger than that of the second contact surface 18 is the movable range of the second contact surface 18. By setting the relative sizes of the two, the space of relative displacement can be reasonably determined, so as to meet the requirements of shock absorption and anti-shaking. Both the first contact surface 17 and the second contact surface 18 are circular structures, and the damping layer 15 is arranged on the surface of the first contact surface 17. Because the size of the first contact surface 17 is larger, setting the damping layer 15 on the first contact surface 17 can ensure that the second contact surface 18 is fully affected by the damping layer 15 no matter how it relatively displaces. Setting the first contact surface 17 and the second contact surface 18 as circular is because it is impossible to predict in which direction the hull will swing. The circular second contact surface 18 can contact the boundary of the first contact surface 17 in any direction, and when it contacts the boundary, it means that the lower fixing member 4 and the upper fixing member 3 reach the maximum displacement.

[0032] In order to provide a variety of damping forces, the damping layer 15 is, for example Figure 4 As shown in the figure, the damping layer 15 includes a first damping area 19 and a second damping area 20. The damping force provided by the second damping area 20 is greater than that of the first damping area 19. Both the first damping area 19 and the second damping area 19 are distributed in a circular pattern around the center of the first contact surface 17, and the second damping area 19 is distributed on the side of the first damping area 19 away from the center of the circle. By using the two damping areas, the damping layer 15 can provide two different sizes of damping forces. Its core function is to be able to adapt to the working conditions. The second damping area 20 is on the outer side away from the center of the circle. The effect achieved by this design is that when there is a high-frequency small-amplitude vibration, the second contact surface 18 is in the first damping area 19. When it undergoes relative displacement, the resistance it receives is small, and it can better use the relative displacement to reduce vibration. If the resistance received is large, then the upper fixing member 3 and the lower fixing member 4 tend to be rigid in the horizontal direction, which is contrary to the concept of using displacement to reduce vibration. When the hull begins to swing, the second contact surface 18 will move from the first damping area 19 to the second damping area 20. During this movement, when the second contact surface 18 is about to reach the boundary of the first contact surface 17, the damping increases. This design has the following two advantages:

[0033] First, the increased resistance received by the second contact surface 18 can reduce the collision with the boundary of the first contact surface 17;

[0034] Second, as is common knowledge, the hull's swaying is a reciprocating motion state. For example, after the hull swings to an angle to the left, it will start to swing back to the right. Since the lower fixing member 4 is fixedly connected to the hull floor, the swing of the lower fixing member 4 is consistent with that of the hull. However, due to the existence of damping force, the upper fixing member 3 is subjected to resistance, resulting in a certain delay in the movement generated with the lower fixing member 4. That is, the upper fixing member 3 and the lower fixing member 4 do not swing synchronously. Then, if the hull swings to the maximum angle and starts to swing back, the upper fixing member 3, due to the large resistance, has not reached the maximum displacement yet, while the lower fixing member 4 swings back again. In this way, the swing amplitude of the upper fixing member 3 is smaller than that of the hull, which can also effectively improve stability. Therefore, designing two different damping forces is also to be able to reduce a certain swaying amplitude of the electrical switch cabinet while meeting the shock absorption requirements.

[0035] As Figure 4 shown, both the first damping region 19 and the second damping region 20 are a number of annular stripes protruding from the first contact surface 17, and the stripe density of the second damping region 20 is greater than that of the first damping region 19. The damping force is actually the magnitude of the frictional force between the first contact surface 17 and the second contact surface 18. Therefore, using the raised stripes can effectively increase the frictional force between the two contacts. There are many ways to achieve the damping force. Here, it is only introduced as one of the embodiments. The first damping region 19 and the second damping region 20 are not clearly demarcated either. They can also be designed in a progressive manner. For example, the stripe density gradually becomes denser from the center of the circle to the outside. This can make the damping provided more linear and the stability better.

[0036] As Figure 2 shown, the upper fixing member 3 further includes a first enclosing plate 8 arranged around the edge of the top plate 7. The clamping structure includes a first insertion block 12 and an inner slot 13. The inner slot 13 is arranged on the side wall of the support member 9, and the first insertion block 12 is arranged on the first enclosing plate 8. When the first contact surface 17 and the second contact surface 18 are displaced relative to each other to the edge, the first insertion block 12 is inserted into the inner slot 13. The clamping structure uses the insertion method to achieve the rigid connection in the up and down direction between the upper fixing member 3 and the lower fixing member 4. As can be seen from the above text, the first contact surface 17 and the second contact surface 18 can generate relative displacement horizontally. Therefore, using the horizontal insertion method can better achieve the up and down fixation of the upper fixing member 3 and the lower fixing member 4. When the first contact surface 17 and the second contact surface 18 move in the opposite direction, the rigid connection can also be better separated without the need for an additional driving structure, and it can adaptively meet the requirements.

[0037] Since the first contact surface 17 can only reach the boundary of the second contact surface 18 by moving in one direction, using the first insertion block 12 to insert into the inner slot 13 can only achieve the fixation on one side. The fixation on a single side may not be firm enough. As Figure 5As shown, the lower fixing member 4 further includes a second shroud 10 disposed around the edge of the support member 9. A second insertion block 14 is installed on the second shroud 10. An outer slot 11 is provided on the side of the first shroud 8 away from the first insertion block 12. When the first contact surface 17 and the second contact surface 18 are displaced relative to each other to the edge, the second insertion block 14 is inserted into the outer slot 11. It is necessary to provide a plugging structure between the first shroud 8 and the support member 9, and also provide a plugging structure between the second shroud 10 and the first shroud 8. When the support member 9 moves to one side, the first insertion block 12 of the first shroud 8 on the reached side can be inserted into the inner slot 13 to complete the fixation on this side. On the opposite side, due to the movement of the support member 9, the second insertion block 14 on the second shroud 10 can be inserted into the outer slot 11 to complete the fixation on the other side, making the fixation on both sides stronger.

[0038] As Figure 6 shown, the first shroud 8 and the top plate 7 are detachably connected, and the second shroud 10 and the support member 9 are detachably connected. Since both the upper fixing member 3 and the lower fixing member 4 have shrouds, and the support member 9 needs to have a certain movement space on the top plate 7, there needs to be a gap between the shrouds. The insertion blocks installed on the shrouds make the shrouds not a regular-shaped structure. Therefore, when installing the upper fixing member 3 and the lower fixing member 4, first detach the first shroud 8 and the second shroud 10. After installing the outer wall, first install the first shroud 8, and then install the outer second shroud 10, which can facilitate the overall assembly. The installation can be carried out by bolts or by welding.

[0039] Anti-collision pads 16 are provided inside both the inner slot 13 and the outer slot 11. The anti-collision pads 16 are provided to avoid damaging the insertion blocks.

[0040] It should be noted that in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variation thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

Claims

1. An earthquake-resistant electric switch cabinet, comprising a cabinet body (1) and a base (2), characterized in that, The base (2) includes an upper fixing member (3) and a lower fixing member (4). The upper fixing member (3) is connected to the cabinet body (1), and the lower fixing member (4) is fixedly installed on the ground. A first contact surface (17) is provided on the upper fixing member (3), and a second contact surface (18) is provided on the lower fixing member (4). A damping layer (15) is provided between the first contact surface (17) and the second contact surface (18) for providing a damping force when the first contact surface (17) and the second contact surface (18) undergo relative displacement in the horizontal direction. The sides of the upper fixing member (3) and the lower fixing member (4) are both provided with mutually cooperating clamping structures for forming a rigid connection in the up-and-down direction between the upper fixing member (3) and the lower fixing member (4) when the first contact surface (17) and the second contact surface (18) are displaced to the edge relative to each other.

2. The seismic-resistant electric switch cabinet according to claim 1, characterized in that, The upper fixing member (3) includes a top plate (7), and the bottom of the top plate (7) is the first contact surface (17). The lower fixing member (4) includes a support member (9), and the top of the support member (9) is the second contact surface (18). The size of the first contact surface (17) is larger than the size of the second contact surface (18).

3. The seismic-resistant electric switchgear according to claim 2, characterized in that, Both the first contact surface (17) and the second contact surface (18) are circular structures, and the damping layer (15) is provided on the surface of the first contact surface (17).

4. An earthquake-resistant electric switch cabinet according to claim 3, characterized in that, The damping layer (15) includes a first damping region (19) and a second damping region (20). The damping force provided by the second damping region (20) is greater than that of the first damping region (19). Both the first damping region (19) and the second damping region (20) are distributed in a circular pattern around the center of the first contact surface (17), and the second damping region (20) is distributed on the side of the first damping region (19) away from the center.

5. An earthquake-resistant electric switch cabinet according to claim 4, characterized in that, Both the first damping region (19) and the second damping region (20) are a number of annular stripes protruding from the first contact surface (17), and the stripe density of the second damping region (20) is greater than that of the first damping region (19).

6. The seismic-resistant electric switch cabinet according to claim 2, wherein The upper fixing member (3) further includes a first enclosing plate (8) provided around the edge of the top plate (7). The clamping structure includes a first insertion block (12) and an inner slot (13). The inner slot (13) is provided on the side wall of the support member (9), and the first insertion block (12) is provided on the first enclosing plate (8) so that when the first contact surface (17) and the second contact surface (18) are displaced to the edge relative to each other, the first insertion block (12) is inserted into the inner slot (13).

7. An earthquake-resistant electric switch cabinet according to claim 6, characterized in that, The lower fixing member (4) further includes a second enclosing plate (10) provided around the edge of the support member (9). A second insertion block (14) is installed on the second enclosing plate (10), and an outer slot (11) is provided on the side of the first enclosing plate (8) away from the first insertion block (12) so that when the first contact surface (17) and the second contact surface (18) are displaced to the edge relative to each other, the second insertion block (14) is inserted into the outer slot (11).

8. An earthquake-resistant electric switch cabinet according to claim 7, characterized in that, The connection between the first enclosing plate (8) and the top plate (7) is detachable, and the connection between the second enclosing plate (10) and the support member (9) is detachable.

9. An earthquake-resistant electric switch cabinet according to claim 7, characterized in that, Anti-collision pads (16) are provided inside both the inner slot (13) and the outer slot (11).

10. An earthquake-resistant electric switch cabinet according to claim 1, characterized in that, The upper fixing member (3) is connected to the bottom of the cabinet body (1) through shock-absorbing bolts (5), and the lower fixing member (4) is fixedly connected to the ground through expansion bolts (6).

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