Relay protection device

Abstract

The utility model provides a relay protection device, and relates to the technical field of relay protection, the relay protection device comprises a box body and at least two plug-ins, the box body is provided with a cavity, the plug-ins are inserted in the cavity, the at least two plug-ins are arranged at intervals along a first direction, and a heat dissipation channel extending along a second direction is formed between two adjacent plug-ins; the second direction is perpendicular to the first direction; a plurality of heat dissipation structures are arranged on the box body, each heat dissipation structure is used for achieving heat dissipation in a heat dissipation channel, each heat dissipation structure comprises at least one heat dissipation assembly, an air inlet and an air outlet, the air inlets and the air outlets enable the corresponding heat dissipation channels to be communicated with the external space, and the air inlets and the air outlets are formed in the two extending ends of the heat dissipation channels respectively. The heat dissipation assembly is used for forming airflow blowing from the air inlet to the air outlet in the heat dissipation channel. The one-way flowing heat dissipation airflow can timely take away heat generated when the plug-ins operate from the box body, the heat dissipation efficiency is high, the adjacent plug-ins are not prone to mutual interference, and the heat dissipation requirement of the plug-ins under high-load operation is met.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of relay protection, and more particularly to a relay protection device. BACKGROUND

[0002] The relay protection device is a device used in the power system, and its main function is to detect faults and send signals when the power system fails, so that the circuit breaker trips, thereby cutting off the fault part and ensuring the safe and stable operation of the power system.

[0003] The relay protection device is mainly composed of a case and a plurality of plug-ins plugged into the case, and each plug-in has a corresponding relay protection circuit. Each plug-in generates a large amount of heat during operation, so the plug-in needs to be cooled to ensure normal operation of the plug-in.

[0004] At present, the plug-in is cooled by setting a heat dissipation fin on the plug-in, installing a fan on the case, or adding a heat conduction substrate and other heat dissipation structures. However, due to the limited layout space of the plug-in in the case, the size of the heat dissipation fin and the heat conduction substrate and other heat dissipation structures that can be arranged on the plug-in or the case is small, resulting in poor heat dissipation effect. The heat dissipation structure on the plug-in cannot timely export the heat after absorbing the heat, which also affects the adjacent plug-in. The use of a fan for cooling cannot form a continuous air flow channel due to the layout of the plug-in. The conventional one-way fan cannot generate continuous air flow in the case, so it cannot quickly remove the heat generated by the plug-in, and cannot meet the cooling needs of the relay protection device under high load conditions. It is prone to work abnormally or damaged under high load operation. CONTENT OF THE UTILITY MODEL

[0005] The purpose of the embodiment of the application is to provide a relay protection device to solve the problem of poor heat dissipation effect in the prior art.

[0006] To achieve the above purpose, the application provides a relay protection device, comprising a case and at least two plug-ins, the case has a cavity, the plug-ins are plugged into the cavity, at least two plug-ins are arranged along a first direction, and a heat dissipation channel extending along a second direction is formed between two adjacent plug-ins; the second direction is perpendicular to the first direction; the case is provided with a plurality of heat dissipation structures, each heat dissipation structure is used to realize heat dissipation in a heat dissipation channel, the heat dissipation structure comprises at least one heat dissipation component, an air inlet and an air outlet for connecting the corresponding heat dissipation channel to the outside space, the air inlet and the air outlet are respectively arranged at two extension ends of the heat dissipation channel, and the heat dissipation component is used to form an air flow in the heat dissipation channel from the air inlet to the air outlet.

[0007] In some embodiments, the heat dissipation assembly comprises a support component and at least one fan, the support component is arranged at the air outlet or the air inlet, and the support component is provided with a ventilation structure for connecting the cavity with an external space, the fan is connected to the support component and arranged along a second direction with the ventilation structure.

[0008] In some embodiments, the heat dissipation assembly further comprises a waterproof and breathable membrane, the waterproof and breathable membrane is arranged on the support component and covers the ventilation structure, and the fan is located on a side of the waterproof and breathable membrane facing the cavity.

[0009] In some embodiments, the support component comprises a first support plate and a second support plate arranged on the first support plate, the first support plate is connected to the cabinet, the fan is connected to the second support plate, the ventilation structure comprises a first ventilation hole arranged on the first support plate and a second ventilation hole arranged on the second support plate, the first ventilation hole and the second ventilation hole are arranged in communication, and the waterproof and breathable membrane is clamped between the first support plate and the second support plate and covers the first ventilation hole and the second ventilation hole.

[0010] In some embodiments, the first support plate is formed with a receiving groove, and the second support plate is embedded in the receiving groove.

[0011] In some embodiments, two heat dissipation assemblies are arranged, and the two heat dissipation assemblies are arranged at the air inlet and the air outlet respectively, the air supply amount of the fan in the heat dissipation assembly arranged at the air inlet is less than the air exhaust amount of the fan in the heat dissipation assembly arranged at the air outlet.

[0012] In some embodiments, the outer side wall of the cabinet is provided with a heat dissipation structure.

[0013] In some embodiments, the insert comprises a panel and a plug-in plate arranged on the panel, at least one inner surface of the cabinet is provided with a sliding rail extending along a third direction, the plug-in plate is slidingly connected to the sliding rail, and the third direction is perpendicular to the first direction and the second direction.

[0014] In some embodiments, the insert further comprises a movable buckle, the movable buckle is rotationally connected to the panel, and the cabinet is provided with a clamping groove, and the movable buckle is clamped in the clamping groove.

[0015] In some embodiments, the relay protection device further comprises a control board, the control board is arranged in the cavity, the control board is provided with a first connector corresponding to each insert, one end of the plug-in plate away from the panel is provided with a second connector, the second connector is plugged with the first connector, so that the plug-in plate is electrically connected with the control board.

[0016] The relay protection device provided by the application has the beneficial effects that, compared with the prior art, the relay protection device is arranged in the cavity of the box, and multiple relatively independent heat dissipation channels are formed between the inserts arranged in the cavity, so that the heat generated by the inserts is dissipated into the adjacent heat dissipation channels, and then the heat dissipation structure forms a unidirectional and continuous heat dissipation airflow in the corresponding heat dissipation channel, continuously discharges the heat generated by the inserts from the box, and continuously sends the cold air in the external space into the heat dissipation channel, so as to realize the heat dissipation and cooling of the inserts, and because the heat dissipation channels are relatively independent, the heat generated by the adjacent inserts is not easy to interfere with each other, the heat dissipation efficiency is relatively high, and the heat dissipation demand of each insert under high load operation can be met. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the application, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0018] Figure 1 FIG. 1 is a structural schematic diagram of a relay protection device in an embodiment of the application;

[0019] Figure 2 FIG. 2 is a sectional view in the A-A direction of the relay protection device in the embodiment of the application; Figure 1

[0020] Figure 3 FIG. 3 is an exploded view of the box of the relay protection device in the embodiment of the application;

[0021] Figure 4 FIG. 4 is an exploded view of the relay protection device in the embodiment of the application;

[0022] Figure 5 FIG. 5 is a sectional view in the B part of the relay protection device in the embodiment of the application; Figure 2

[0023] Figure 6 FIG. 6 is an exploded view of the heat dissipation assembly of the relay protection device in the embodiment of the application;

[0024] Figure 7 FIG. 7 is an exploded view of the insert arranged in the cavity in the embodiment of the application;

[0025] Figure 8 FIG. 8 is a sectional view in the C part of the insert arranged in the cavity in the embodiment of the application. Figure 7

[0026] In the drawings, various reference signs represent the following:

[0027] ​​​100 - box; 110 - end plate; 120 - cover plate; 121 - through hole; 122 - limiting structure; 123 - sliding rail; 1231 - sliding groove; 124 - clamping groove; 130 - side plate; 101 - cavity; 200 - insert; 201 - heat dissipation channel; 210 - panel; 220 - plug-in board; 221 - second joint; 230 - movable buckle; 231 - clamping part; 300 - heat dissipation assembly; 310 - support part; 311 - first support plate; 3111 - first air hole; 3112 - accommodating groove; 312 - second support plate; 3121 - second air hole; 320 - fan; 330 - waterproof and breathable film; 400 - control board; 401 - first joint. DETAILED DESCRIPTION

[0028] In order to make the technical problems to be solved, technical solutions and beneficial effects of the present application clearer, the present application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not intended to limit the present application.

[0029] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0030] It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0031] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0032] The embodiments of the present application provide a kind of relay protection device, in combination with Figure 1 and Figure 2As shown, the relay protection device comprises a box body 100 and at least two plug-ins 200, the box body 100 has a cavity 101, the plug-ins 200 are inserted into the cavity 101, the at least two plug-ins 200 are arranged in a first direction, and a heat dissipation channel 201 extending in a second direction is formed between the adjacent two plug-ins 200, the second direction is perpendicular to the first direction. A plurality of heat dissipation structures are arranged on the box body 100, and each heat dissipation structure is used to realize heat dissipation in a heat dissipation channel 201. The heat dissipation structure comprises at least one heat dissipation assembly 300 and an air inlet and an air outlet for connecting the corresponding heat dissipation channel 201 with the external space, the air inlet and the air outlet are arranged at the two extending ends of the heat dissipation channel 201 respectively, and the heat dissipation assembly 300 is used to form an air flow in the heat dissipation channel 201 from the air inlet to the air outlet.

[0033] Specifically, the box body 100 is a shell structure with a certain volume, and the cavity 101 for inserting a plurality of plug-ins 200 is formed on the inner side of the box body 100. The cavity 101 is a containing structure with a certain volume, and the size of the cavity 101 can be adapted to the size of the plug-ins 200 to be inserted and the number of the plug-ins 200. The box body 100 should have at least one opening for the plug-ins 200 to be inserted into or pulled out of the cavity 101 through the opening. Among them, the shape of the box body 100 and the shape of the cavity 101 can be arbitrary.

[0034] For example, as shown in the drawings, Figure 3 The box body 100 can include an end plate 110, two cover plates 120, and two side plates 130, the end plate 110 is vertically arranged, the cover plates 120 are horizontally arranged, and the two cover plates 120 are respectively connected to the upper and lower ends of the end plate 110, the side plates 130 are perpendicular to the end plate 110 and the cover plates 120, and the two side plates 130 are respectively connected to the left and right ends of the end plate 110, and the upper and lower ends of the side plates 130 are respectively connected to the two cover plates 120, to form a rectangular shell-shaped box body 100, and the end plate 110, the two cover plates 120 and the two side plates 130 together form a rectangular cavity 101, and an opening is formed on the side of the cavity 101 away from the end plate 110. Among them, the end plate 110, the cover plate 120 and the side plate 130 can be integrally connected, or can be connected to each other by screws and other fasteners, which are not limited in the embodiment.

[0035] Referring to Figure 4The plug-in 200 is provided with a relay protection circuit and an integrated module constituting each component in the relay protection circuit. By inserting the plug-in 200 into the cavity 101, the plug-in 200 can stably operate inside the cavity 101. The number of plug-ins 200 can be arbitrary, for example, six plug-ins 200 are inserted into the cavity 101. The first direction can be the horizontal direction, and the second direction can be the vertical direction. The plurality of plug-ins 200 are arranged in the cavity 101 along the horizontal direction, and the upper and lower sides of each plug-in 200 correspond to the upper and lower cover plates 120, respectively, so that each adjacent two plug-ins 200 form a heat dissipation channel 201 extending in the vertical direction between the two cover plates 120.

[0036] The heat dissipation structure can be provided on the two cover plates 120 of the box body 100. The cover plate 120 can be provided with a through hole 121 corresponding to the heat dissipation channel 201, and the through hole 121 can communicate the cavity 101 with the external space of the box body 100. The through hole 121 on one of the cover plates 120 can serve as an air inlet, and the through hole 121 on the other cover plate 120 can serve as an air outlet. For example Figure 2 and Figure 3 As shown in the drawings, the through hole 121 provided on the lower cover plate 120 serves as an air inlet, and the through hole 121 provided on the upper cover plate 120 serves as an air outlet. The heat dissipation assembly 300 forms an air flow flowing from bottom to top in the heat dissipation channel 201.

[0037] The heat dissipation assembly 300 refers to an assembly capable of sending air from the external space into the heat dissipation channel 201 through the air inlet or discharging air in the heat dissipation channel 201 to the external space through the air outlet. Two heat dissipation assemblies 300 can be included in the same heat dissipation structure, and the two heat dissipation assemblies 300 are respectively arranged at the air inlet and the air outlet, i.e. the two heat dissipation assemblies 300 are respectively arranged at the through holes 121 of the upper and lower cover plates 120. One of the heat dissipation assemblies 300 sends air to the heat dissipation channel 201 through the air inlet, and the other heat dissipation assembly 300 discharges air from the heat dissipation channel 201 through the air outlet. In addition, the heat dissipation structure can also include one heat dissipation assembly 300, which can be arranged at the air inlet or the air outlet. When the heat dissipation assembly 300 is arranged at the air inlet, it sends air to the heat dissipation channel 201, and when the heat dissipation assembly 300 is arranged at the air outlet, it discharges air from the heat dissipation channel 201, both of which can form an air flow flowing from the air inlet to the air outlet in the heat dissipation channel 201.

[0038] By forming a one-way continuous heat dissipation air flow in the heat dissipation channel 201, the heat generated by the plug-in 200 during operation can be carried away from the box body 100 by the heat dissipation air flow in time, and the heat generated by the plug-in 200 is less likely to interfere with the adjacent plug-in 200, meeting the heat dissipation requirements of each plug-in 200 under high load operation, ensuring the stable operation of each plug-in 200, and reducing the problems of abnormal operation or damage of the plug-in 200.

[0039] It can be understood that any number of heat dissipation structures can be provided on the box 100, for example, one heat dissipation structure is provided at each heat dissipation channel 201, or heat dissipation structures are provided at one or more heat dissipation channels 201, which can be adaptively arranged according to the heat generated by the components of each plug-in 200 when it is running at full load. For example Figure 2 As shown, heat dissipation structures are provided at heat dissipation channels 201 with large widths formed by large distances between adjacent two plug-ins 200, and heat dissipation channels 201 with small widths formed by small distances between adjacent two plug-ins 200 can use the heat dissipation airflow flowing in adjacent heat dissipation channels 201 for heat dissipation.

[0040] In addition, the flow directions of the heat dissipation airflows in each heat dissipation channel 201 should be the same, that is, the directions of the airflows driven by all heat dissipation assemblies 300 located on the same cover plate 120 should be the same, so as to avoid the heat dissipation airflows in adjacent heat dissipation channels 201 being different and causing airflow turbulence in the box 100, which affects the heat dissipation effect.

[0041] As shown in Figure 5 and Figure 6 In some embodiments, the heat dissipation assembly 300 includes a support part 310 and at least one fan 320, the support part 310 is arranged at the air inlet or the air outlet, and the support part 310 is provided with a ventilation structure for connecting the cavity 101 with the external space, and the fan 320 is arranged on the support part 310 and arranged along the second direction with the ventilation structure.

[0042] Specifically, the fan 320 is a kind of airflow conveying part, the fan 320 has rotatable blades, in use, the airflow is driven to flow by the rotation of the blades, the rotation direction of the blades is different, and the flow direction of the airflow driven thereby is also changed. Therefore, by changing the installation direction of the fan 320 or the rotation direction of the blades in different heat dissipation assemblies 300, the heat dissipation assembly 300 can perform corresponding air supply or air exhaust, so as to achieve the purpose of air supply to the heat dissipation channel 201 by one side fan 320 and air exhaust from the heat dissipation channel 201 by the other side fan 320. The number of fans 320 can be any, for example, two fans 320 are arranged on each heat dissipation assembly 300, so as to improve the air supply amount or the air exhaust amount of each heat dissipation assembly 300.

[0043] The support member 310 can be mounted at the through hole 121 of the cover plate 120, and the shape of the support member 310 can be arbitrary, and the size and shape of the support member 310 can be adapted to be provided based on the specific number of the fans 320 in the heat dissipation assembly 300, for example, the support member 310 is a rectangular structure. The ventilation structure can be one or more ventilation holes provided on the support member 310, and the number of the ventilation structure can be the same as the number of the fans 320. For example, the heat dissipation assembly 300 includes two fans 320, and the support member 310 is provided with two ventilation structures arranged at intervals, and the two fans 320 are respectively arranged at the two ventilation structures of the support member 310.

[0044] As shown in Figure 5 The support member 310 can be embedded in the through hole 121, and the inner side of the through hole 121 can also be provided with a limiting structure 122, so that the support member 310 is embedded in the through hole 121 and abuts on the limiting structure 122, so that the outer surface of the support member 310 is flush with the outer wall of the box body 100. In addition, the support member 310 can be provided on the outer surface or the inner surface of the cover plate 120 and shielded the through hole 121. The fan 320 can be mounted on the side of the support member 310 facing the cavity 101 and built-in the cavity 101 through the through hole 121. In addition, the fan 320 can also be mounted on the side of the support member 310 away from the cavity 101, so that the fan 320 protrudes on the outside of the box body 100.

[0045] When the support member 310 is connected to the cover plate 120, the cavity 101 is communicated with the external space through the through hole 121 and the ventilation structure, so that the airflow can enter or discharge the cavity 101 by rotating the fan blades of the fan 320. Wherein, the support member 310 can be connected to the cover plate 120 by screws and other fasteners, or can be connected to the cover plate 120 by buckling and other clamping structures.

[0046] In some embodiments, the heat dissipation assembly 300 further includes a waterproof breathable film 330, the waterproof breathable film 330 is provided on the support member 310 and shields the ventilation structure, and the fan 320 is located on the side of the waterproof breathable film 330 facing the cavity 101.

[0047] Specifically, the waterproof and breathable membrane 330 is a material with a microporous structure, such as polytetrafluoroethylene (PTFE) or other materials with similar microporous properties. The micropores of the waterproof and breathable membrane 330 are small in size, which can prevent water droplets and dust and other larger particles from passing through, and enable air to pass through smoothly. The shape and size of the waterproof and breathable membrane 330 can be matched with the support member 310, and one waterproof and breathable membrane 330 can be correspondingly arranged at each ventilation structure, or one waterproof and breathable membrane 330 with a larger area can be directly covered at all ventilation structures. When the ventilation structure is one or more ventilation holes, the waterproof and breathable membrane 330 should cover all the ventilation holes to shield the heat dissipation channel 201 and the external space environment by the waterproof and breathable membrane 330. The fan 320 can be installed on the side of the support member 310 facing the cavity 101 and built into the cavity 101, and the waterproof and breathable membrane 330 is located between the fan 320 and the support member 310.

[0048] Using the waterproof and breathable membrane 330 to shield the ventilation structure and the fan 320 can improve the protection capability of the case, prevent water vapor and pollutants in the external space from entering the case 100 to contact the electrical components such as the plug-in 200 and the fan 320, and ensure the air flow of the heat dissipation channel 201 and maintain the temperature balance inside the case.

[0049] In some embodiments, the support member 310 can include a first support plate 311 and a second support plate 312 arranged on the first support plate 311, the first support plate 311 is connected to the case 100, and the fan 320 is connected to the first support plate 311 or the second support plate 312. The ventilation structure includes a first ventilation hole 3111 arranged on the first support plate 311 and a second ventilation hole 3121 arranged on the second support plate 312, and the first ventilation hole 3111 and the second ventilation hole 3121 are in communication. The waterproof and breathable membrane 330 is clamped between the first support plate 311 and the second support plate 312 and shields the first ventilation hole 3111 and the second ventilation hole 3121.

[0050] Specifically, the first support plate 311 and the second support plate 312 are both flat structures with a certain area, and the shapes of the first support plate 311 and the second support plate 312 can be arbitrary, for example, the first support plate 311 and the second support plate 312 are both rectangular. The first support plate 311 and the second support plate 312 can be connected and fixed by screws and other fasteners, or can be connected and fixed by buckles and other clamping members.

[0051] The second support plate 312 can be arranged on the corresponding side of the first support plate 311 according to the installation position of the fan 320, for example, when the fan 320 is installed on the inner side of the cabinet 100, the second support plate 312 can be arranged on the side of the first support plate 311 facing the cavity 101, and the fan 320 is installed on the side of the second support plate 312 away from the first support plate 311 and is placed on the inner side of the cabinet 100 through the through hole 121. Alternatively, when the fan 320 is installed on the outer side of the cabinet 100, the second support plate 312 can be arranged on the side of the first support plate 311 away from the cavity 101, and the fan 320 is installed on the side of the second support plate 312 away from the first support plate 311, so as to fix the fan 320 on the outer side of the cabinet 100.

[0052] The waterproof and breathable membrane 330 is clamped between the first support plate 311 and the second support plate 312 and between the first air hole 3111 and the second air hole 3121, so as to shield the communication between the first air hole 3111 and the second air hole 3121, and make the air pass through the waterproof and breathable membrane when entering or discharging the heat dissipation channel 201 through the first air hole 3111 and the second air hole 3121. The shapes of the first air hole 3111 and the second air hole 3121 can be arbitrary, when the fan 320 is installed on the inner side of the cabinet 100, the first air hole 3111 can be composed of a plurality of small-sized heat dissipation holes, and the second air hole 3121 can be a circular hole matched with the shape of the fan 320. The plurality of heat dissipation holes can be arranged in a circular shape and correspond to the second air hole 3121. The first air hole 3111 composed of a plurality of heat dissipation holes forms a grid-shaped protection structure on the first support plate 311, which can not only realize smooth air circulation, but also block larger objects from being sucked into the first air hole and causing damage to the waterproof and breathable membrane 330.

[0053] As shown in FIG. 1, in some embodiments, the first support plate 311 is formed with a receiving groove 3112, and the second support plate 312 is embedded in the receiving groove 3112. Figure 6 The receiving groove 3112 is a receiving structure with a certain area, and the shape and size of the receiving groove 3112 can be matched with the second support plate 312, for example, the receiving groove 3112 is rectangular. By embedding the second support plate 312 and the waterproof and breathable membrane 330 in the receiving groove 3112, the installation position of the second support plate 312 and the waterproof and breathable membrane 330 can be positioned, and the thickness of the entire support component 310 can be reduced, facilitating the connection of the support component 310 on the cabinet 100.

[0054] In addition, when assembling the heat dissipation assembly 300, the plurality of fans 320 can be first installed on the second support plate 312, and then the waterproof and breathable membrane 330 and the second support plate 312 are sequentially placed in the accommodating cavity, and then the first support plate 311 and the second support plate 312 are connected and fixed, thereby forming the entire heat dissipation assembly 300. Through the connection and disconnection of the first support plate 311 and the cabinet 100, the heat dissipation assembly 300 is simple and convenient to disassemble and assemble on the cabinet 100, facilitating the maintenance, maintenance and replacement of the heat dissipation assembly 300.

[0055] In some embodiments, when the same heat dissipation structure includes two heat dissipation assemblies 300, the air supply amount of the fan 320 in the heat dissipation assembly 300 arranged at the air inlet is less than the air exhaust amount of the fan 320 in the heat dissipation assembly 300 arranged at the air outlet.

[0056] Specifically, as shown in Figure 3 The lower heat dissipation assembly 300 is used for air supply to the heat dissipation channel 201, and the upper heat dissipation assembly 300 is used for air exhaust to the heat dissipation channel 201. The rotation speed of the fan 320 in the lower heat dissipation assembly 300 can be lower than that of the fan 320 in the upper heat dissipation assembly 300, so that the air supply amount of the lower fan 320 into the heat dissipation channel 201 is less than the air exhaust amount of the upper fan 320 to the heat dissipation channel 201. In addition, the blade size of the lower fan 320 can be smaller than that of the upper fan 320, so that the air supply amount of the lower fan 320 is less than the air exhaust amount of the upper fan 320 at the same rotation speed. By making the air supply amount less than the air exhaust amount, a negative pressure environment can be formed in the cabinet 100, so that external cold air can continuously enter the inside of the cabinet 100, further improving the heat dissipation effect.

[0057] In some embodiments, the outer side wall of the cabinet 100 is provided with a heat dissipation structure. Specifically, the heat dissipation structure can be a heat dissipation groove and a heat dissipation hole opened on the outer side wall of the cabinet 100, or a heat dissipation fin protruding on the outer wall of the cabinet 100. As shown in Figure 1 The outer surfaces of the cover plate 120 and the side plate 130 of the cabinet 100 are provided with a plurality of heat dissipation grooves, and the shape of the heat dissipation grooves can be linear or other shapes, so as to increase the area of the outer surface of the cabinet 100 and improve the heat dissipation efficiency. In addition, the end plate 110, the cover plate 120 and the side plate 130 can be made of aluminum alloy or other heat conduction materials with high heat conduction efficiency, so as to further improve the heat conduction and heat dissipation effect of the cabinet 100.

[0058] As shown in Figure 7As shown, in some embodiments, the plug-in 200 comprises a panel 210 and a plug-in board 220 arranged on the panel 210, and at least one inner wall of the box 100 is provided with a sliding rail 123 extending in a third direction, and the plug-in board 220 is slidingly connected in the sliding rail 123. The third direction is perpendicular to the first direction and the second direction.

[0059] Specifically, the panel 210 is a flat structure with a certain area, and the panel 210 can be arranged in a vertical direction. The plug-in board 220 is a circuit board with a relay protection circuit and corresponding components welded thereon, and the plug-in board 220 is also arranged in a vertical direction and perpendicular to the panel 210. After the plug-in board 220 is inserted into the cavity 101, the plug-in board 220 is arranged parallel to the side plate 130 of the box 100, and a heat dissipation channel 201 is formed between the adjacent two plug-in boards 220.

[0060] The sliding rail 123 can be a component arranged on the inner wall of the box 100 and protruding towards the cavity 101, and is provided with a sliding groove 1231 extending in the third direction. The length of the sliding groove 1231 can be the same as the insertion depth of the plug-in board 220, and the depth of the sliding groove 1231 can match the part on the upper and lower sides of the plug-in board 220 which is not provided with components and relay protection circuit, so that the plug-in board 220 will not interfere with the circuit or components on the plug-in board 220 after being embedded in the sliding groove 1231. By connecting the plug-in board 220 with the sliding groove 1231, the sliding connection of the plug-in board 220 with the sliding rail 123 is realized, the insertion or extraction of the plug-in board 220 is guided, and the plug-in position of the plug-in board 220 in the cavity 101 is positioned.

[0061] When the plug-in board 220 is arranged vertically in the cavity 101, the sliding rail 123 can be arranged on the side of the cover plate 120 facing the plug-in board 220. Among them, the sliding rail 123 can be arranged only on one of the cover plates 120, that is, one side of the plug-in board 220 is slidingly arranged in the sliding rail 123, or the sliding rail 123 is arranged on both cover plates 120, so that the upper and lower ends of the plug-in board 220 are connected in the sliding rails 123 of the upper and lower cover plates 120 respectively, improving the positioning effect of the plug-in board 220. Among them, the sliding rail 123 can be made of insulating materials such as plastic to avoid interference with the circuit on the plug-in board 220.

[0062] In addition, when multiple plug-in boards 220 are inserted into the cavity 101, the surface of the panel 210 facing the plug-in board 220 can abut against the opening end of the box 100, and the edges of the panels 210 of adjacent plug-ins 200 abut each other, so that all the panels 210 jointly shield the opening of the cavity 101, which can protect the plug-in boards 220 inside the cavity 101, and on the other hand can ensure the uniformity and stability of the direction of the heat dissipation airflow.

[0063] As Figure 8As shown, in some embodiments, the plug-in 200 further comprises a movable buckle 230, which is rotatably connected to the panel 210, and the box body 100 is provided with a buckle slot, and the movable buckle 230 is buckled in the buckle slot.

[0064] Specifically, the shape of the movable buckle 230 can be arbitrary, and the movable buckle 230 can be located at the bottom of the panel 210, and the bottom of the panel 210 can be provided with a rotating shaft, and the movable buckle 230 is rotatably connected to the rotating shaft. The buckle slot 124 is arranged at the position corresponding to the buckle of the box body 100, for example, Figure 8 As shown, the buckle slot 124 can be arranged on the side of the lower cover plate 120 facing the opening of the cavity 101, and the buckle slot 124 can be provided with a plurality of buckle slots arranged along the extension direction of the cover plate 120, so as to buckle the movable buckle 230 on different plug-ins 200. The bottom of the movable buckle 230 is provided with a buckling part 231, which can be buckled into the buckle slot 124 below, so as to limit the position of the plug-in 200. When disassembling the plug-in 200, press the movable buckle 230 downward to make the buckling part 231 rotate upward and disengage from the buckle slot 124, so that the plug-in 200 can be pulled out from the cavity 101, thereby facilitating the disassembly of the plug-in 200.

[0065] Combined with Figure 4 And Figure 7 As shown, in some embodiments, the relay protection device further comprises a control board 400, which is arranged in the cavity 101, and the control board 400 is provided with a first connector 401 corresponding to the plug-in position of each plug-in 200, and the side of the plug-in plate 220 away from the panel 210 is provided with a second connector 221, and the second connector is plugged into the corresponding first connector, so that the control board 400 and the plug-in plate 220 are electrically connected.

[0066] Specifically, the control board 400 is also a circuit board, and the control board 400 can be provided with control circuit and components constituting the control circuit. The control board 400 can be vertically fixed on the side of the cavity 101 close to the end plate 110, and arranged parallel to the end plate 110. The number of first connectors 401 is the same as the number of plug-ins 200 and one-to-one corresponding, when the plug-in 200 is inserted into the cavity 101, under the guidance of the sliding groove 1231, the second connector 221 of the plug-in plate 220 is plugged into the first connector 401, so that the control circuit on the control board 400 and the relay protection circuit on the plug-in plate 220 are connected, and the operation of the relay protection circuit is controlled and monitored through the control circuit. Among them, the first connector 401 and the second connector 221 can be conventional plug-in terminals.

[0067] To sum up, the relay protection device provided by the embodiment of the application forms a one-way continuous flow of cooling air in the corresponding cooling channel 201 through the two cooling assemblies 300 arranged at the two extension ends of the cooling channel 201 respectively, achieves cooling of the plug-in unit 200, and the adjacent plug-in units 200 are not easy to interfere with each other, the flow direction of the cooling air is not easy to be disordered, the cooling efficiency is relatively high, the cooling demand of the plug-in unit 200 under high load operation can be met, and the occurrence of problems such as abnormal operation or damage of the plug-in unit 200 is reduced.

[0068] The above merely describes the preferred embodiments of the application and is not intended to limit the application. Any modification, equivalent replacement and improvement made within the spirit and principle of the application shall be included in the protection scope of the application.

Claims

1. A protective relay device, characterized in that The box has a cavity, and the inserts are arranged in the cavity; the inserts are arranged in a first direction, and the adjacent inserts form a heat dissipation channel extending in a second direction; the second direction is perpendicular to the first direction; The box is provided with a plurality of heat dissipation structures, each of which is used to realize heat dissipation in a heat dissipation channel; the heat dissipation structure comprises at least one heat dissipation component and an air inlet and an air outlet for connecting the corresponding heat dissipation channel with the external space; the air inlet and the air outlet are arranged at the two extension ends of the heat dissipation channel; the heat dissipation component is used to form an air flow in the heat dissipation channel from the air inlet to the air outlet.

2. The protective relay of claim 1, wherein, The heat dissipation component comprises a support part and at least one fan; the support part is arranged at the air outlet or the air inlet, and the support part is provided with a ventilation structure for connecting the cavity with the external space; the fan is connected to the support part and arranged in the second direction with the ventilation structure.

3. The protective relay of claim 2, wherein, The heat dissipation component further comprises a waterproof and breathable membrane; the waterproof and breathable membrane is arranged on the support part and covers the ventilation structure; the fan is located on the side of the waterproof and breathable membrane facing the cavity.

4. The protective relay of claim 3, wherein, The support part comprises a first support plate and a second support plate arranged on the first support plate; the first support plate is connected to the box, and the fan is connected to the second support plate; The ventilation structure comprises a first ventilation hole arranged on the first support plate and a second ventilation hole arranged on the second support plate; the first ventilation hole and the second ventilation hole are connected; the waterproof and breathable membrane is clamped between the first support plate and the second support plate and covers the first ventilation hole and the second ventilation hole.

5. The protective relay of claim 4, wherein, The first support plate forms a receiving groove, and the second support plate is embedded in the receiving groove.

6. The protection device according to any one of claims 2-5, characterized in that, The heat dissipation component is provided with two heat dissipation components; the two heat dissipation components are arranged at the air inlet and the air outlet; the air supply amount of the fan in the heat dissipation component arranged at the air inlet is less than the air exhaust amount of the fan in the heat dissipation component arranged at the air outlet.

7. The protection device according to any one of claims 1 to 5, characterized in that The outer wall of the box is provided with a heat dissipation structure.

8. The protection device according to any one of claims 1-5, characterized in that, The insert comprises a panel and an insertion plate arranged on the panel; at least one inner surface of the box is provided with a sliding rail extending in a third direction; the insertion plate is slidingly connected to the sliding rail; the third direction is perpendicular to the first direction and the second direction.

9. The protection device according to claim 8, characterized in that The insert further comprises a movable buckle; the movable buckle is rotationally connected to the panel; the box is provided with a clamping groove; the movable buckle is clamped in the clamping groove.

10. The protective relay of claim 8, wherein, The relay protection device further comprises a control board; the control board is arranged in the cavity; the control board is provided with a first connector corresponding to each insert; one end of the insertion plate away from the panel is provided with a second connector; the second connector is inserted with the first connector to electrically connect the insertion plate with the control board.

Images