Ring main unit

Abstract

The utility model relates to a ring main unit, which comprises a cabinet body, a plurality of air inlets, a plurality of air outlets, a fan and a dustproof net, the air inlets are arranged on the left side of the cabinet body, an accommodating cavity is arranged in the cabinet body, the air outlets are arranged on the rear side of the cabinet body, the fan is arranged in the accommodating cavity, and the dustproof net detachably connected with the cabinet body is arranged on the rear side of the fan. Each air inlet is located in the left side of the cabinet body, a filter screen is arranged on one side, located at each air inlet, of the cabinet body, the installation plate is installed in the containing cavity in a sliding mode in the vertical direction, a limiting plate is arranged on the portion, located on the rear side of the installation plate, of the cabinet body, and backward projections of the left side and the right side of the installation plate both fall on the limiting plate; a mounting groove is formed in the limiting plate, and the dustproof net is located in the mounting groove and detachably connected with the limiting plate. By adopting the scheme, the ring main unit provided by the utility model has the advantages that the dustproof net is arranged on the limiting plate of the cabinet body, so that elements in the cabinet body cannot be directly contacted when the limiting plate is disassembled and assembled and the dustproof net is cleaned.

Description

Technical Field

[0001] This utility model relates to a ring main unit. Background Technology

[0002] A ring main unit (RNB) is an electrical device used in medium-voltage power distribution systems. It is mainly used in power distribution networks to realize the distribution, protection, and control of electrical energy. The main function of the RNB is to connect various distribution nodes in a ring power supply network. It can facilitate operations such as line segmentation, interconnection, and load transfer. It typically contains components such as circuit breakers, load switches, fuses, and surge arresters, which can provide short-circuit protection, overload protection, and isolation of system faults.

[0003] However, the various components inside the ring main unit generate a lot of heat during operation. In order to control the temperature inside the unit, a cooling fan is usually installed on the unit to achieve air circulation and heat dissipation. At the same time, a filter is designed to ensure good ventilation while preventing dust intrusion. For example, Chinese patent CN202420534992.5 discloses a solar waterproof dehumidification and heat dissipation ring main unit. Similarly, a dustproof net can be installed at the air outlet to effectively block external dust from entering the unit from the rear through the air outlet.

[0004] However, when it is necessary to disassemble or assemble the dustproof screen, it is easy to accidentally come into contact with the components inside the cabinet. Therefore, how to safely and conveniently remove the dustproof screen has become an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a ring network cabinet in which the dustproof net is installed on the limiting plate of the cabinet so that the dustproof net will not directly contact the components inside the cabinet when cleaning the dustproof net by removing and installing the limiting plate.

[0006] To achieve the above objectives, this utility model provides the following technical solution: It includes a cabinet, several air inlets, several air outlets, a fan, and a dustproof net. Each air inlet is located on the left side of the cabinet. A receiving cavity is provided inside the cabinet. The air outlets are located on the rear side of the cabinet. The fan is located within the receiving cavity and has a dustproof net detachably connected to the cabinet on its rear side. Each air inlet is located on the left side of the cabinet, and a filter screen is provided on one side of the cabinet near each air inlet. It also includes a mounting plate for mounting the fan. The mounting plate slides vertically within the receiving cavity. A limiting plate is detachably mounted on the rear side of the cabinet near the mounting plate. The rearward projections of both sides of the mounting plate fall onto the limiting plate. An installation groove is provided on the limiting plate. The dustproof net is located within the installation groove and is detachably connected to the limiting plate.

[0007] The present invention is further configured such that: the limiting plate is provided with guide blocks protruding on both the left and right sides of the mounting plate, each guide block is inserted into the mounting plate, the length direction of each guide block extends vertically, and each guide block is set with a constricted opening from front to back.

[0008] The present invention is further configured to include a left screw and a right screw located on the left and right sides of the mounting plate, wherein the left screw and the right screw are rotatably mounted on the cabinet and threadedly engaged with the mounting plate.

[0009] The present invention is further configured to include a timing belt, wherein a left drive wheel is fixedly installed on the left screw above the cabinet, a right drive wheel is fixedly installed on the right screw above the cabinet, and the timing belt transmission is arranged between the left drive wheel and the right drive wheel.

[0010] The present invention is further configured such that a handle is fixedly installed on the left drive wheel.

[0011] The present invention is further configured such that each of the air outlets is flared out from front to back.

[0012] The present invention is further configured such that: a plurality of limiting blocks are provided on the limiting plate protruding rearward, each limiting block is made of a material that is prone to deformation and includes an insertion section and a limiting section, the dustproof net is provided with an insertion groove corresponding to each insertion section, the width of each insertion groove is greater than the corresponding insertion section, and the front end face of each limiting section abuts against the rear end face of the dustproof net.

[0013] By adopting the above technical solution, since the limiting plate is detachably connected to the cabinet, the dustproof net on the limiting plate can be removed after the limiting plate is removed, allowing for the cleaning of dust, sand, and other small substances accumulated on the dustproof net, as well as insects and other objects blocked by it. Furthermore, since the rearward projections of the fan mounting plate on both sides fall on the limiting plate, the fan will come into contact first during the removal of the limiting plate, and then the components inside the housing cavity will come into contact. This reduces the risk of electric shock caused by accidental contact with components during the removal of the limiting plate, thereby improving the operational safety during the removal and installation of the limiting plate. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a perspective view of a specific embodiment of the present utility model;

[0016] Figure 2 This is an exploded view of the present invention from a rear-to-front perspective;

[0017] Figure 3 This is an exploded view of the present invention from a front-to-back perspective;

[0018] Figure 4 for Figure 2 Enlarged view of A in the middle;

[0019] Figure 5 for Figure 2 Enlarged view of B in the middle;

[0020] Figure 6 for Figure 2 A magnified view of C.

[0021] In the diagram: 1-cabinet, 11-air inlet, 12-air outlet, 13-filter, 14-accommodating cavity, 15-limiting plate, 151-mounting groove, 152-guide block, 153-limiting block, 1531-insertion section, 1532-limiting section, 16-installation position;

[0022] 2- Fan;

[0023] 3-Dustproof net, 31-Installation slot;

[0024] 4-Mounting plate;

[0025] 5-Left screw, 51-Left drive wheel, 511-Handle;

[0026] 6-Right screw, 61-Right drive wheel;

[0027] 7-Synchronous belt. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] like Figures 1-6As shown, this utility model discloses a ring main unit, including a cabinet body 1, several air inlets 11, several air outlets 12, a fan 2, and a dustproof net 3. Each air inlet 11 is located on the left side of the cabinet body 1, and a filter screen 13 is provided on one side of the cabinet body 1 at each air inlet 11. The cabinet body 1 is provided with a receiving cavity 14 for storing various components. The air outlets 12 are located on the rear side of the cabinet body 1. The fan 2 is located in the receiving cavity 14, and a dustproof net 3 is provided on its rear side that is detachably connected to the cabinet body 1 by bolts or other means. When the fan 2 is started, it generates suction during operation, thereby removing dust from the air inlet 1. Moisture and heat inside cabinet 1 are discharged through each air outlet 12, creating a negative pressure inside cabinet 1. Fresh air from outside passes through the filter 13 and enters the receiving cavity 14 through each air inlet 11. The cabinet also includes a mounting plate 4 for installing the fan 2. The mounting plate 4 slides vertically within the receiving cavity 14. A limiting plate 15 is detachably mounted on the rear side of cabinet 1 behind the mounting plate 4 using bolts or other means. The rearward projections of the left and right sides of the mounting plate 4 fall on the limiting plate 15. The limiting plate 15 has mounting grooves 151. The dustproof net... 3 is located in the mounting groove 151 and is detachably connected to the limiting plate 15 by bolts or other means. The cabinet 1 is provided with a mounting position 16 for wiring the fan 2 (the wiring method of the fan 2 is existing technology and will not be described in detail here). Since the limiting plate 15 is detachably connected to the cabinet 1, after the limiting plate 15 is removed, the dustproof net 3 on the limiting plate 15 can be removed, so that the dust, sand and other small substances accumulated on the dustproof net 3, as well as the insects and other objects blocked, can be cleaned. Furthermore, since the projections of the mounting plate 4 of the fan 2 on both sides fall on the limiting plate 15, the fan 2 can be detached from the mounting plate 15. On the mounting plate 15, the fan 2 will come into contact first and then the components in the receiving cavity 14 during the disassembly of the mounting plate 15. This reduces the risk of electric shock caused by accidental contact with components during the disassembly of the mounting plate 15, thereby improving the operational safety during the disassembly and assembly of the mounting plate 15. Furthermore, since the mounting plate 4 can slide and be installed in the receiving cavity 14 in the vertical direction, the fan 2 located on the mounting plate 4 can be moved up and down by sliding the mounting plate 4, thereby changing the coverage area of ​​the suction force generated by the fan 2 when it is working at different positions in the receiving cavity 14, thus improving the heat dissipation effect.

[0030] The limiting plate 15 has guide blocks 152 protruding from both the left and right sides of the mounting plate 4. Each guide block 152 is inserted into the mounting plate 4. The length of each guide block 152 extends vertically and is tapered from front to back. 1. After the limiting plate 15 is installed on the cabinet 1, during the sliding motion of the mounting plate 4, each guide block can always be inserted into the mounting plate 4, so the mounting plate 4 can always move along the length of the guide block 152, thus guiding the vertical movement of the fan 2. 2. Since each guide block 152 is tapered from front to back, when the limiting plate 15 is installed on the rear side of the cabinet 1, each guide block 152 can first be inserted into the narrowest part of the mounting plate 4, thus achieving smoother insertion of each guide block 152 into the mounting plate 4.

[0031] In addition, it also includes a left screw 5 and a right screw 6 located on the left and right sides of the mounting plate 4. The left screw 5 and the right screw 6 are rotatably mounted on the cabinet 1 and threadedly engaged with the mounting plate 4. Since the left screw 5 and the right screw 6 are rotatably mounted on the cabinet 1 and threadedly engaged with the mounting plate 4, by applying torque to the left screw 5 and the right screw 6, the left screw 5 and the right screw 6, which are threadedly engaged with the mounting plate 4, can move up and down along the mounting plate 4 while driving the left screw 5 and the right screw 6 to rotate, thereby realizing the position adjustment of the fan 2 in the receiving cavity 14.

[0032] The system also includes a synchronous belt 7. The left screw 5 is located above the cabinet 1 and is fixedly installed with a left drive wheel 51 by welding, keying, or other methods. The right screw 6 is located above the cabinet 1 and is fixedly installed with a right drive wheel 61 by welding, keying, or other methods. The synchronous belt 7 is positioned between the left drive wheel 51 and the right drive wheel 61. Since the left drive wheel 51 is fixedly installed on the left screw 5 and the right drive wheel 61 is fixedly installed on the right screw 6, rotating the left drive wheel 51 will cause the left screw 5, which is fixed to the left drive wheel 51, to rotate. At the same time, the synchronous belt 7 can drive the right drive wheel 61 and the right screw 6 on the other side to rotate. Therefore, the arrangement of the left drive wheel 51, the right drive wheel 61, and the synchronous belt 7 allows the rotation of either the left drive wheel 51 or the right drive wheel 61 to drive the other drive wheel to rotate, without having to apply force to the two drive wheels separately, making the height adjustment of the fan 2 more convenient and efficient.

[0033] Preferably, a handle 511 is fixedly installed on the left drive wheel 51 by welding or other means. Since the handle 511 is fixedly connected to the left drive wheel 51, it is not necessary to directly contact the left screw 5 and the left drive wheel 51. Instead, by applying force to the handle 511, the left drive wheel 51 and the left screw 5 can be driven to rotate, which reduces the risk of accidental injury and reduces wear on the surface of the drive wheel.

[0034] Each of the air outlets 12 is located on the dustproof net 3 and is flared from front to back. Since each air outlet 12 is flared from front to back, the rear diameter of each air outlet 12 is the largest, which makes it easier for the air inside the cabinet 1 to flow out of the cabinet 1 when the fan 2 is working. At the same time, external particles entering the air outlet 12 will be blocked by the front side of each air outlet 12, that is, the side with the smallest diameter, and thus cannot enter the receiving cavity 14.

[0035] The limiting plate 15 has several limiting blocks 153 protruding rearward. Each limiting block 153 is made of a deformable material such as rubber and includes an insertion section 1531 and a limiting section 1532. The dustproof net 3 has an insertion groove 31 corresponding to each insertion section 1531. The width of each insertion groove 31 is greater than the width of the corresponding insertion section 1531. The front end face of each limiting section 1532 abuts against the rear end face of the dustproof net 3. When it is necessary to remove the dustproof net 3 from the limiting plate 15, the limiting blocks 1533 are adjusted accordingly. Force is applied to the limiting section 1532 of 3 to bend each limiting section 1532 toward the insertion slot 31 and separate it from the dustproof net 3 through each insertion slot 31, thereby realizing the disassembly and assembly of the dustproof net 3 and the limiting plate 15. The dustproof net 3 can be cleaned. When the dustproof net 3 needs to be installed on the limiting plate 15, each limiting section 1532 needs to be bent first so that it can pass through the corresponding insertion slot 31. At this time, each limiting section 1532 returns to its original position and can abut against the dustproof net 3, so that the dustproof net 3 can be stably positioned on the limiting plate 15.

[0036] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A ring main unit, comprising a cabinet, a plurality of air inlets, a plurality of air outlets, a fan, and a dust filter, wherein each of the air inlets is located on the left side of the cabinet, the cabinet contains a receiving cavity, the air outlets are located on the rear side of the cabinet, the fan is located within the receiving cavity and has a dust filter detachably connected to the cabinet on its rear side, each of the air inlets is located on the left side of the cabinet, and the cabinet has a filter on one side of each air inlet, characterized in that: It also includes a mounting plate for installing the fan, which is slidably installed in the receiving cavity in the vertical direction. The cabinet is located behind the mounting plate and a limiting plate is detachably installed. The rearward projections of the left and right sides of the mounting plate fall on the limiting plate. The limiting plate is provided with a mounting groove. The dustproof net is located in the mounting groove and is detachably connected to the limiting plate.

2. A ring main unit according to claim 1, characterized in that: The limiting plate has guide blocks protruding from both the left and right sides of the mounting plate. Each guide block is inserted into the mounting plate. The length of each guide block extends vertically and each guide block is tapered from front to back.

3. A ring main unit according to claim 1 or 2, characterized in that: It also includes a left screw and a right screw located on the left and right sides of the mounting plate, both of which are rotatably mounted on the cabinet and threadedly engaged with the mounting plate.

4. A ring main unit according to claim 3, characterized in that: It also includes a timing belt, with a left drive wheel fixedly installed on the left screw above the cabinet, and a right drive wheel fixedly installed on the right screw above the cabinet. The timing belt transmission is located between the left drive wheel and the right drive wheel.

5. A ring main unit according to claim 4, characterized in that: A handle is fixedly installed on the left drive wheel.

6. A ring main unit according to claim 1, characterized in that: All of the aforementioned air outlets are flared outwards from front to back.

7. A ring main unit according to claim 1 or 6, characterized in that: The limiting plate has several limiting blocks protruding rearward. Each limiting block is made of a material that is prone to deformation and includes an insertion section and a limiting section. The dustproof net has an insertion groove corresponding to each insertion section. The width of each insertion groove is greater than the corresponding insertion section. The front end face of each limiting section abuts against the rear end face of the dustproof net.

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