A low-voltage switchgear cabinet

Abstract

The present invention discloses a low-voltage switchgear cabinet, and the present invention relates to the technical field of electrical equipment. The low-voltage switchgear cabinet includes a cabinet body and a plurality of drawer units slidably connected in the cabinet body at equal intervals. A plurality of air holes are equidistantly arranged on the front end face of the drawer unit. A heat dissipation cavity communicated with the drawer unit is arranged at the rear part of the inner cavity of the cabinet body. A secondary locking mechanism for further locking and limiting the drawer unit during heat dissipation is jointly arranged between the mobile heat dissipation mechanism and the locking mechanism. A matching mechanism is arranged on the secondary locking mechanism and is used to cooperate with the locking mechanism to quickly unlock the locking mechanism so that the drawer can be quickly withdrawn. The present invention realizes targeted heat dissipation through the mobile heat dissipation mechanism, only dissipates heat from the drawer units that need to be cooled, avoids energy waste, improves energy efficiency, and provides a stronger heat dissipation effect for high-load drawers to ensure that the equipment operates at the optimal temperature. At the same time, the heat dissipation mechanism is used to realize the automatic unlocking and quick withdrawal of the drawer, without the need for additional tools, which simplifies the operation.

Description

Technical Field

[0001] The invention relates to the technical field of electrical equipment, in particular to a low-voltage switch cabinet. Background Art

[0002] Low-voltage switchgear is a distribution equipment used in power systems. Its main function is to manage, control and protect electrical equipment in power systems to ensure safe and reliable distribution of electricity. It is widely used in various buildings, power facilities and industrial sites. According to the structure and purpose, low-voltage switchgear can be divided into three main types: fixed type, drawer type and box type. Among them, the drawer-type low-voltage switchgear is widely used due to its modular and flexible design. The drawer-type low-voltage switchgear consists of multiple independent drawer units, each of which can be withdrawn independently and has built-in electrical components such as circuit breakers, contactors, fuses, etc. Through modular design, the drawer-type switchgear can achieve flexible power distribution and control, and is easy to maintain and expand. During the operation of the drawer-type low-voltage switchgear, electrical components will generate a lot of heat during long-term operation. Since the equipment in the low-voltage switchgear is usually highly integrated and the power load is large, if the heat cannot be dissipated in time and effectively, it may cause the equipment to overheat, thereby causing a series of problems. Therefore, heat dissipation is very important for low-voltage switchgear.

[0003] Existing drawer-type low-voltage switch cabinets usually adopt an overall heat dissipation method, but overall heat dissipation means that all drawers are dissipating heat, even if some drawers do not need heat dissipation or only need very little heat dissipation, which will lead to energy waste, because the heat dissipation system will continue to operate and consume unnecessary power resources. Moreover, since the entire heat dissipation system disperses resources and cannot be concentrated on the parts that really need heat dissipation, this may cause some high-load or high-heat drawers to not get enough heat dissipation, resulting in equipment overheating, performance degradation, and even possible failures. For low-load or non-heating drawers, the role of the heat dissipation system appears redundant, and it is difficult to make targeted heat dissipation adjustments for the overall heat dissipation according to the specific situation of each drawer, and it is impossible to effectively ensure that the equipment operates within the optimal temperature range.

[0004] In addition, the existing drawer unit needs to be locked in a limited position after being placed in the switch cabinet. When the drawer unit needs to be pulled out of the switch cabinet, additional tools are usually required. Using tools to unlock the drawer will increase the operation time, especially when the drawer needs to be frequently plugged and unplugged or multiple maintenance is required. The operator may need to spend extra time to find and use these tools, resulting in inconvenience in operation. Summary of the invention

[0005] The present invention provides a low-voltage switchgear cabinet, which solves the technical problems that the overall heat dissipation method of the existing low-voltage switchgear cabinet lacks pertinence, resulting in unnecessary energy waste, and it is impossible to concentrate heat dissipation to the drawers with high load or high heat generation, which may cause the equipment to overheat and the performance to decline. At the same time, the operation of the drawer unit is cumbersome and requires additional tools to unlock, increasing the operation time and complexity, especially affecting the efficiency during frequent plugging and unplugging or maintenance.

[0006] A low-voltage switchgear cabinet provided by the present invention includes a cabinet body and a plurality of drawer units slidably connected to the cabinet body at equal intervals. A plurality of air holes are equidistantly formed on the front end face of the drawer unit. A heat dissipation cavity communicating with the drawer unit is formed at the rear of the inner cavity of the cabinet body. A mobile heat dissipation mechanism is installed in the heat dissipation cavity for moving to the required heat dissipation drawer unit according to the drawer units with different heat generation amounts for heat dissipation. The mobile heat dissipation mechanism includes two slide bars symmetrically and fixedly connected between the upper and lower cavity walls of the heat dissipation cavity, an electric sliding frame slidably connected to the outside of the slide bars, a plurality of mounting holes horizontally and equidistantly formed on the electric sliding frame, heat dissipation blades rotatably connected to the mounting holes through connecting plates, and a docking component arranged at the front of the electric sliding frame to facilitate communication with the drawer unit. A locking mechanism for quickly locking the drawer units placed in the cabinet body is symmetrically installed between the drawer unit and the cabinet body. A secondary locking mechanism for further locking and limiting the drawer units during heat dissipation is jointly arranged between the mobile heat dissipation mechanism and the locking mechanism. A matching mechanism for cooperating with the locking mechanism to quickly unlock the locking mechanism so that the drawer can be quickly pulled out is arranged on the secondary locking mechanism.

[0007] In a possible implementation manner, the locking mechanism includes a mounting plate fixedly connected to the side end face of the drawer unit and a strip-shaped sliding seat fixedly connected to the front cavity wall of the heat dissipation cavity. A trapezoidal block is slidably connected in the strip-shaped sliding seat. A fixed block is fixedly connected to the front cavity wall of the heat dissipation cavity. A top spring is jointly fixedly connected between the fixed block and the trapezoidal block. A strip-shaped groove is formed on one side of the mounting plate close to the trapezoidal block. A tongue rod cooperating with the trapezoidal block is hinged in the strip-shaped groove through a rotating column. A limiting spring is jointly fixedly connected between the tongue rod and the strip-shaped groove. A stopping member for clamping the trapezoidal block is jointly arranged between the front cavity wall of the heat dissipation cavity and the trapezoidal block.

[0008] In a possible implementation manner, the stopping member includes two first strip-shaped rods respectively fixedly connected to the upper and lower sides of the trapezoidal block. The front cavity wall of the heat dissipation cavity is symmetrically and fixedly connected with second strip-shaped rods cooperating with the first strip-shaped rods through fixing columns. Card slots are respectively formed on one sides of the first strip-shaped rod and the second strip-shaped rod far away from the top spring. A C-shaped elastic sheet is fixedly connected to the front cavity wall of the heat dissipation cavity through a connecting rod. Clamping strips cooperating with the card slots are fixedly connected to both ends of the C-shaped elastic sheet.

[0009] In a possible implementation, the auxiliary locking mechanism includes two sliding through grooves symmetrically formed on the left and right of the electric carriage, an L-shaped plate slidably connected in the sliding through grooves, and a prismatic shaft rotatably connected through the upper wall plate of the cabinet body. A return spring is fixedly connected between the L-shaped plate and the sliding through groove. Push rods are fixedly connected to the opposite sides of the two L-shaped plates. A double-headed convex block cooperating with the push rod is sleeved and slidably connected to the outside of the prismatic shaft. Two collars sleeved on the outside of the prismatic shaft are symmetrically arranged up and down and fixedly connected to the middle of the rear end face of the electric carriage through a connecting frame, and the two collars are respectively located on the upper and lower sides of the double-headed convex block. A vertical groove is formed on one side of the mounting plate close to the L-shaped plate, and a tongue cooperating with the vertical groove is fixedly connected to one side of the L-shaped plate close to the vertical groove.

[0010] In a possible implementation, the matching mechanism includes two dial posts symmetrically fixed to the rear end face of the C-shaped elastic piece up and down. Arc-shaped pressing blocks cooperating with the dial posts are fixedly connected to the upper and lower sides of the parallel section of the L-shaped plate and the C-shaped elastic piece through connecting blocks.

[0011] In a possible implementation, a torsion spring is fixedly connected between the outside of the prismatic shaft and the upper end face of the cabinet body. A push rod is slidably connected to the upper part of the cabinet body, and a telescopic column hinged to the push rod is fixedly connected to the outside of the prismatic shaft.

[0012] In a possible implementation, the docking assembly includes spring telescopic ejector posts fixedly connected to the four corners of the front end face of the electric carriage. A docking frame is fixedly connected to the front ends of the spring telescopic ejector posts. A flexible telescopic cylinder is fixedly connected between the docking frame and the electric carriage.

[0013] In a possible implementation, a dust-proof net is fixedly connected to the inner cavity of the heat dissipation chamber and behind the electric carriage. A plurality of cross bars are fixedly connected at equal intervals longitudinally between the left and right cavity walls of the heat dissipation chamber and behind the dust-proof net. A plurality of baffle plates are rotatably connected at equal intervals along the axial direction through rotating rings to the outside of the cross bars.

[0014] It can be seen from the above technical solutions that the present invention has the following advantages:

[0015] In the present invention, through the electric carriage in the mobile heat dissipation mechanism moving to the exact rear of the drawer unit that needs to be cooled for targeted heat dissipation, only the drawer unit that needs to be cooled is cooled, avoiding unnecessary energy consumption for the drawer units that do not need to be cooled or only need very little cooling, improving the energy utilization efficiency. It can also concentrate energy on the drawer units that truly need heat dissipation, providing a stronger heat dissipation effect for the high-load or high-heat-generating drawer units, ensuring that the drawer units can operate within the optimal temperature range, and being able to flexibly adjust the heat dissipation range and intensity according to actual needs, adapting to different working conditions and load changes, making the low-voltage switchgear more adaptable and flexible.

[0016] In the present invention, when the mobile heat dissipation mechanism moves to the exact rear of the drawer unit to be withdrawn, it drives the auxiliary locking mechanism and the matching mechanism to combine with each other to unlock the locking mechanism, so as to facilitate the unlocking and withdrawal of the drawer unit. It can automatically unlock and quickly withdraw the drawer without the need for additional tools, avoiding the extra time added by using additional tools and simplifying the operation steps.

[0017] In the present invention, when the drawer unit does not need heat dissipation, the baffle located at the rear naturally hangs down to seal the rear, effectively preventing dust from entering the interior of the cabinet. The reduction of dust reduces the frequency of cleaning and maintenance, ensuring the safety of the low-voltage switchgear cabinet. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the provided drawings.

[0019] Figure 1 Schematic diagram of the structure of the low-voltage switchgear cabinet provided by the present invention.

[0020] Figure 2 Schematic diagram of the rear view perspective of the overall structure provided by the present invention.

[0021] Figure 3 Schematic diagram of the sectional structure of the cabinet body provided by the present invention.

[0022] Figure 4 Provided by the present invention Figure 3 Schematic diagram of the enlarged structure of part A.

[0023] Figure 5 Provided by the present invention Figure 3 Schematic diagram of the enlarged structure of part B.

[0024] Figure 6 Schematic diagram of the partial layout structure of the drawer unit and the mobile heat dissipation mechanism provided by the present invention.

[0025] Figure 7 Schematic diagram of the sectional installation structure of the locking mechanism provided by the present invention.

[0026] Figure 8 Schematic diagram of the installation structure of the auxiliary locking mechanism provided by the present invention.

[0027] Figure 9 Schematic diagram of the sectional installation structure of the docking component provided by the present invention.

[0028] Figure 10 Schematic diagram of the installation structure of the baffle from the left viewing angle provided by the present invention.

[0029] Among them, the above-mentioned drawings include the following reference numerals:

[0030] 1. Cabinet body; 2. Drawer unit; 3. Air hole; 4. Heat dissipation cavity; 5. Mobile heat dissipation mechanism; 51. Slide bar; 52. Electric sliding frame; 53. Installation hole; 54. Heat dissipation blade; 55. Docking component; 551. Spring telescopic ejector post; 552. Docking frame; 553. Flexible telescopic cylinder; 6. Locking mechanism; 61. Installation plate; 62. Strip-shaped sliding seat; 63. Trapezoidal block; 64. Top spring; 65. Strip-shaped groove; 66. Tongue rod; 67. Limit spring; 68. Stopping part; 681. First strip-shaped rod; 682. Second strip-shaped rod; 683. Card slot; 684. C-shaped elastic sheet; 685. Card strip; 7. Auxiliary lock mechanism; 71. Sliding through groove; 72. L-shaped plate; 73. Prismatic shaft; 74. Return spring; 75. Thrust rod; 76. Double-headed convex block; 77. Sleeve ring; 78. Vertical groove; 79. Card tongue; 8. Matching mechanism; 81. Pushing column; 82. Arc-shaped extrusion block; 9. Push rod; 10. Telescopic column; 11. Dust-proof net; 12. Cross bar; 13. Baffle. Specific embodiments

[0031] In order to make the above objects, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention will be described in detail below with reference to the drawings. Many specific details are set forth in the following description in order to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0032] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 6 and Figure 7, the present invention provides a technical solution: a low-voltage switchgear cabinet, including a cabinet body 1 and a plurality of drawer units 2 slidably connected to the cabinet body 1 at equal intervals. A plurality of air holes 3 are equidistantly arranged on the front end face of the drawer unit 2. A heat dissipation cavity 4 communicating with the drawer unit 2 is arranged at the rear part of the inner cavity of the cabinet body 1. A mobile heat dissipation mechanism 5 for moving to the required heat dissipation drawer unit 2 according to the drawer unit 2 with different heat generation amounts to dissipate heat is installed in the heat dissipation cavity 4. A locking mechanism 6 for quickly locking the drawer unit 2 placed in the cabinet body 1 is symmetrically installed on the left and right between the drawer unit 2 and the cabinet body 1. A secondary locking mechanism 7 for further locking and limiting the drawer unit 2 during heat dissipation is jointly arranged between the mobile heat dissipation mechanism 5 and the locking mechanism 6. A matching mechanism 8 for cooperating with the locking mechanism 6 to quickly unlock the locking mechanism 6 so that the drawer can be quickly pulled out is arranged on the secondary locking mechanism 7.

[0033] Please refer to Figure 3 , Figure 5 , Figure 6 and Figure 9 , in this embodiment, the mobile heat dissipation mechanism 5 includes two slide rods 51 symmetrically and fixedly connected between the upper and lower cavity walls of the heat dissipation cavity 4, an electric sliding frame 52 slidably connected to the outside of the slide rods 51, a plurality of mounting holes 53 horizontally and equidistantly arranged on the electric sliding frame 52, heat dissipation blades 54 rotatably connected to the mounting holes 53 through connecting plates, and a docking assembly 55 arranged at the front part of the electric sliding frame 52 for facilitating communication with the drawer unit 2. The docking assembly 55 includes spring telescopic top columns 551 fixedly connected to the four corners of the front end face of the electric sliding frame 52. A docking frame 552 is fixedly connected to the front ends of the spring telescopic top columns 551 together. A flexible telescopic cylinder 553 is fixedly connected between the docking frame 552 and the electric sliding frame 52. One side of the docking frame 552 close to the drawer unit 2 is an inclined surface, which is convenient for the docking frame 552 to move to the rear of the drawer unit 2.

[0034] During the operation of the drawer unit 2, when there is a drawer unit 2 with a high heat generation amount, control the electric sliding frame 52 to move to the exact rear of the overheated drawer unit 2. The electric sliding frame 52 drives the docking frame 552 in the docking assembly 55 to move to the rear of the drawer unit 2. Under the pushing of the spring telescopic top columns 551, the docking frame 552 tightly abuts against the rear port of the drawer unit 2. Then control the heat dissipation blades 54 to rotate to pump the air flow in the drawer unit 2 to flow backward, creating a negative pressure in the drawer unit 2. Then the external air flow enters the drawer unit 2 through the air holes 3. The air flow flows from front to back and passes through the drawer unit 2, thereby quickly cooling the drawer unit 2 with a high heat generation amount. When another drawer unit 2 with a high heat generation amount appears after the cooling of the drawer unit 2 is completed, the above steps can be repeated, and control the electric sliding frame 52 to quickly move along the slide rod 51 to the exact rear of another drawer unit 2 that needs heat dissipation to dissipate heat for it.

[0035] In addition, multiple electric sliding frames 52 can be provided to cope with the situation when multiple drawer units 2 need to dissipate heat simultaneously, thereby improving the heat dissipation application range.

[0036] By moving the electric sliding frame 52 to the exact rear of the drawer unit 2 that needs heat dissipation for targeted heat dissipation, only the drawer unit 2 that needs heat dissipation is cooled, avoiding unnecessary energy consumption for drawer units 2 that do not need heat dissipation or only need very little heat dissipation, improving the energy utilization efficiency. It can also concentrate energy on the drawer unit 2 that truly needs heat dissipation, providing a stronger heat dissipation effect for high-load or high-heat-generating drawer units 2, ensuring that the drawer unit 2 can operate within the optimal temperature range.

[0037] Please refer to Figure 4 、 Figure 7 and Figure 8 In this embodiment, the locking mechanism 6 includes a mounting plate 61 fixedly connected to the side end face of the drawer unit 2 and a strip-shaped sliding seat 62 fixedly connected to the front cavity wall of the heat dissipation cavity 4. A trapezoidal block 63 is slidably connected in the strip-shaped sliding seat 62. A fixing block is fixedly connected to the front cavity wall of the heat dissipation cavity 4. A top spring 64 is fixedly connected between the fixing block and the trapezoidal block 63. A strip-shaped groove 65 is opened on one side of the mounting plate 61 close to the trapezoidal block 63. A tongue rod 66 cooperating with the trapezoidal block 63 is hinged in the strip-shaped groove 65 through a rotating column. A limiting spring 67 is fixedly connected between the tongue rod 66 and the strip-shaped groove 65. A locking member 68 for locking the trapezoidal block 63 is provided between the front cavity wall of the heat dissipation cavity 4 and the trapezoidal block 63. The locking member 68 includes two first strip-shaped rods 681 respectively fixedly connected to the upper and lower sides of the trapezoidal block 63. The front cavity wall of the heat dissipation cavity 4 is fixedly connected with second strip-shaped rods 682 cooperating with the first strip-shaped rods 681 through fixing columns symmetrically up and down. Card slots 683 are respectively opened on one side of the first strip-shaped rods 681 and the second strip-shaped rods 682 away from the top spring 64. The front cavity wall of the heat dissipation cavity 4 is fixedly connected with a C-shaped elastic sheet 684 through a connecting rod. Two end portions of the C-shaped elastic sheet 684 are respectively fixedly connected with card strips 685 cooperating with the card slots 683.

[0038] Please refer to Figure 1 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 and Figure 8The auxiliary locking mechanism 7 includes two sliding grooves 71 symmetrically opened on the electric slide 52, an L-shaped plate 72 slidably connected to the sliding grooves 71, and a prismatic shaft 73 that penetrates and rotates on the upper wall plate of the cabinet 1. A reset spring 74 is fixedly connected between the L-shaped plate 72 and the sliding grooves 71. The opposite sides of the two L-shaped plates 72 are fixedly connected to a push rod 75. The outside of the prismatic shaft 73 is slidably connected to a double-headed protrusion 76 that cooperates with the push rod 75. The middle part of the rear end surface of the electric slide 52 is fixedly connected to two rings 7 symmetrically sleeved on the outside of the prismatic shaft 73 through a connecting frame. 7, and the two rings 77 are respectively located at the upper and lower sides of the double-headed protrusion 76, and the two rings 77 are respectively abutted against the upper and lower sides of the double-headed protrusion 76 so that the double-headed protrusion 76 can be driven to move synchronously when the electric slide 52 moves up and down. A vertical groove 78 is opened on the side of the mounting plate 61 close to the L-shaped plate 72, and a tongue 79 that cooperates with the vertical groove 78 is fixedly connected on the side of the L-shaped plate 72 close to the vertical groove 78. The outside of the prismatic shaft 73 is fixedly connected to the upper end surface of the cabinet 1 with a torsion spring, and the upper part of the cabinet 1 is slidably connected to a push rod 9, and the outside of the prismatic shaft 73 is fixedly connected to a telescopic column 10 hinged to the push rod 9.

[0039] See also Figure 4 and Figure 8 The matching mechanism 8 includes two upper and lower symmetrically fixedly connected to the rear end surface of the C-shaped elastic sheet 684, and the upper and lower sides of the L-shaped plate 72 and the C-shaped elastic sheet 684 parallel section are fixedly connected to the arc-shaped extrusion block 82 matching with the locking column 81 through a connecting block.

[0040] When the drawer unit 2 is placed in the cabinet 1, the drawer unit 2 is pushed backward to move. During the backward movement of the drawer unit 2, the mounting plate 61 is driven backward, and the mounting plate 61 then drives the tongue rod 66 backward. When the tongue rod 66 moves backward until it contacts the trapezoidal block 63, it is pushed and rotated around the rotating column, and then retracted into the strip groove 65. After the tongue rod 66 moves backward and passes over the trapezoidal block 63, it is pushed back and rotated under the push of the limit spring 67 and extends out of the strip groove 65. At this time, the extended tongue rod 66 contacts the trapezoidal block On the inclined surface of the trapezoidal block 63, (the slots 683 on the No. 1 strip rod 681 and the No. 2 strip rod 682 located on the opposite sides are in the same straight line in the initial position, so the card strip 685 is stuck in the slots 683 on the No. 1 strip rod 681 and the No. 2 strip rod 682 at the same time), the trapezoidal block 63 is in a stuck state at this time, so the tongue rod 66 that passes over the trapezoidal block 63 and abuts against the inclined surface of the trapezoidal block 63 cannot move forward, thereby completing the locking limit of the drawer unit 2 placed in the cabinet 1.

[0041] The initial position of the double-sided convex block is the position where its convex part is perpendicular to the ejector rod 75. While the electric carriage 52 moves up and down to dissipate heat from the drawer unit 2, it also drives the L-shaped plate 72 in the auxiliary locking mechanism 7 to move synchronously. When the electric carriage 52 moves to the position directly behind the drawer unit 2, the L-shaped plate 72 also drives the tongue 79 to slide into the vertical groove 78, thereby enhancing the stability of the drawer unit 2 during heat dissipation.

[0042] When it is necessary to pull out the drawer unit 2 from the cabinet body 1, control the electric carriage 52 to move to the position directly behind the drawer unit 2 to be pulled out, and then push the push rod 9 backward. The push rod 9 then drives the prismatic shaft 73 to rotate through the telescopic column 10. The rotation of the prismatic shaft 73 drives the double-headed convex block 76 to rotate. When the double-headed convex block 76 rotates, its convex part will gradually contact the ejector rod 75 and push the two ejector rods 75 to move away from each other. The ejector rod 75 then drives the L-shaped plate 72 to move. The movement of the L-shaped plate 72 drives the tongue 79 to move out of the vertical groove 78. At the same time, the L-shaped plate 72 also drives the arc-shaped pressing block 82 to move synchronously, so that the arc surface of the arc-shaped pressing block 82 contacts the dialing post 81. The arc-shaped pressing block 82 presses the dialing post 81 to drive the opening of the C-shaped elastic piece 684 to gradually expand. The C-shaped elastic piece 684 then drives the latch 685 to move, so that the latch 685 moves out of the card slot 683. Then, pull the drawer unit 2 outward to move. The drawer unit 2 then drives the tongue rod 66 to move through the mounting plate 61. During the forward movement of the tongue rod 66, it presses the inclined surface of the trapezoidal block 63, causing the trapezoidal block 63 to move away from the tongue rod 66. Finally, the drawer unit 2 can be pulled out, avoiding the extra time added by using additional tools.

[0043] Then release the pushed push rod 9. The prismatic shaft 73 reverses and resets under the action of the torsion spring, driving the double-headed convex block 76 to return to the initial position. Then the double-headed convex block 76 stops pushing the ejector rod 75. The return spring 74 drives the two L-shaped plates 72 to move closer to each other. The L-shaped plate 72 then drives the tongue 79 and the arc-shaped pressing block 82 to move closer to the mounting plate 61. The arc-shaped pressing block 82 separates from the dialing post 81. Then the C-shaped elastic piece 684 resets and drives the upper and lower latches 685 to move closer to each other. At the same time, the top spring 64 also pushes the trapezoidal block 63 to move in the direction closer to the mounting plate 61 until the trapezoidal block 63 moves to the initial position. The movement of the trapezoidal block 63 drives the first bar 681 to move until the first bar 681 drives the card slot 683 on its side to be in the same straight line as the card slot 683 on the side of the second bar 682 again. Finally, the C-shaped elastic piece 684 resets and drives the latch 685 to be inserted into the coincident card slot 683 again, completing all the resets.

[0044] Please refer to Figure 2 and Figure 10, in this embodiment, a dust-proof net 11 is fixedly connected to the inner cavity of the heat dissipation cavity 4 and behind the electric sliding carriage 52. A plurality of cross bars 12 are fixedly connected at equal intervals longitudinally between the left and right cavity walls of the heat dissipation cavity 4 and behind the dust-proof net 11. A plurality of baffle plates 13 are rotatably connected to the outside of the cross bar 12 at equal intervals along the axial direction through rotating rings.

[0045] When the heat dissipation blades 54 operate to blow air backward, the baffle plate 13 directly behind the electric sliding carriage 52 will be blown and drive the rotating ring to rotate around the cross bar 12, so that the air flow blown out by the heat dissipation blades 54 can be discharged from the space between the lifted baffle plates 13, while the baffle plates 13 not directly behind the electric sliding carriage 52 will hang naturally under the action of gravity, covering the area directly behind the drawer unit 2 that is not in the heat dissipation state, thereby reducing the entry of external dust into the drawer unit 2.

[0046] During operation, when the drawer unit 2 is pushed backward and slid into the cabinet body 1, the locking mechanism 6 is used to quickly lock and limit its position. Then, the mobile heat dissipation mechanism 5 is controlled to operate for targeted heat dissipation and temperature reduction treatment of the drawer unit 2 that needs to be cooled. While the mobile heat dissipation mechanism 5 is operating, it will also drive the auxiliary locking mechanism 7 to operate to further lock the drawer unit 2 during heat dissipation. When the drawer unit 2 needs to be removed, the electric sliding carriage 52 in the mobile heat dissipation mechanism 5 is controlled to move to the position directly behind the drawer unit 2, and then the locking mechanism 6 is controlled to unlock the drawer unit 2 by the cooperation of the auxiliary locking mechanism 7 and the cooperation mechanism 8, so that the drawer unit 2 can be quickly pulled out.

[0047] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0048] In addition, the terms "first", "second", "No. 1", "No. 2" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", "No. 1", "No. 2" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0049] In the present invention, unless otherwise clearly specified or limited, the terms "installed", "connected", "coupled", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] The embodiments of the specific implementation manners are all preferred embodiments of the present invention, and do not limit the protection scope of the present invention accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention shall be covered within the protection scope of the present invention.

Claims

1. A low-voltage switch cabinet, comprising a cabinet body and a plurality of drawer units equidistantly slidably connected in the cabinet body, characterized in that: The front end surface of the drawer unit is provided with a plurality of air holes at equal intervals, and the rear part of the inner cavity of the cabinet is provided with a heat dissipation cavity connected with the drawer unit, and a mobile heat dissipation mechanism is installed in the heat dissipation cavity for moving the drawer units with different heat generation to the required heat dissipation drawer unit for heat dissipation; The mobile heat dissipation mechanism comprises: Two sliding rods symmetrically fixedly connected between the upper and lower walls of the heat dissipation cavity, an electric slide slidably connected to the outside of the sliding rods, a plurality of mounting holes equidistantly arranged on the electric slide, heat dissipation leaves rotatably connected to the mounting holes through a connecting plate, and a docking assembly arranged at the front of the electric slide to facilitate communication with the drawer unit; A locking mechanism for quickly locking the drawer unit placed in the cabinet is symmetrically installed between the drawer unit and the cabinet, an auxiliary locking mechanism for further locking and limiting the drawer unit in the heat dissipation is commonly arranged between the mobile heat dissipation mechanism and the locking mechanism, and a matching mechanism for cooperating with the locking mechanism to quickly unlock the locking mechanism so that the drawer can be quickly pulled out is arranged on the auxiliary locking mechanism; the locking mechanism includes a mounting plate fixedly connected to the side end surface of the drawer unit; The auxiliary locking mechanism includes two sliding through grooves symmetrically opened on the electric slide, an L-shaped plate slidably connected to the sliding through grooves, and a prismatic shaft rotatably connected to the upper wall plate of the cabinet body, the two L-shaped plates are fixedly connected to the opposite sides with a push rod, the outer side of the prismatic shaft is sleeved with a double-headed protrusion slidably connected to the push rod, a vertical groove is opened on the side of the mounting plate close to the L-shaped plate, and a tongue that cooperates with the vertical groove is fixedly connected to the side of the L-shaped plate close to the vertical groove; The outside of the prismatic shaft and the upper end surface of the cabinet are fixedly connected with a torsion spring, the upper part of the cabinet is slidably connected with a push rod, and the outside of the prismatic shaft is fixedly connected with a telescopic column hinged with the push rod.

2. A low voltage switch cabinet according to claim 1, characterized in that: The locking mechanism also includes a strip slide fixedly connected to the front cavity wall of the heat dissipation cavity, a trapezoidal block is slidably connected in the strip slide, a fixed block is fixedly connected to the front cavity wall of the heat dissipation cavity, a top spring is fixedly connected between the fixed block and the trapezoidal block, a strip groove is provided on the side of the mounting plate close to the trapezoidal block, a tongue rod that cooperates with the trapezoidal block is hinged in the strip groove through a rotating column, a limiting spring is fixedly connected between the tongue rod and the strip groove, and a locking piece for clamping the trapezoidal block is provided between the front cavity wall of the heat dissipation cavity and the trapezoidal block.

3. A low voltage switch cabinet according to claim 2, characterized in that: The locking part includes two No. 1 strip rods respectively fixedly connected to the upper and lower sides of the trapezoidal block, and the front cavity wall of the heat dissipation cavity is symmetrically fixedly connected with a No. 2 strip rod cooperating with the No. 1 strip rod through a fixing column, and the No. 1 strip rod and the No. 2 strip rod are respectively provided with a clamping groove on the side away from the top spring, and the front cavity wall of the heat dissipation cavity is fixedly connected with a C-shaped elastic sheet through a connecting rod, and both ends of the C-shaped elastic sheet are fixedly connected with a clamping strip cooperating with the clamping groove.

4. A low voltage switch cabinet according to claim 3, characterized in that: A reset spring is fixedly connected between the L-shaped plate and the sliding groove. Two rings symmetrically sleeved on the outside of the prismatic shaft are fixedly connected to the middle of the rear end surface of the electric slide through a connecting frame, and the two rings are respectively located on the upper and lower sides of the double-headed protrusion.

5. A low voltage switch cabinet according to claim 4, characterized in that: The matching mechanism includes two levers symmetrically fixedly connected to the rear end surface of the C-shaped elastic piece, and the upper and lower sides of the L-shaped plate and the parallel section of the C-shaped elastic piece are fixedly connected to arc-shaped extrusion blocks matching with the levers through connecting blocks.

6. A low voltage switch cabinet according to claim 1, characterized in that: The docking assembly includes spring telescopic top columns fixedly connected to the four corners of the front end surface of the electric slide, the front ends of the spring telescopic top columns are commonly fixedly connected to a docking frame, and a flexible telescopic cylinder is commonly fixedly connected between the docking frame and the electric slide.

7. A low voltage switch cabinet according to claim 1, characterized in that: A dust screen is fixedly connected inside the heat dissipation cavity and behind the electric slide, a plurality of cross bars are fixedly connected longitudinally and equidistantly between the left and right cavity walls of the heat dissipation cavity and behind the dust screen, and a plurality of baffles are axially and equidistantly connected to the outside of the cross bars through a swivel.

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