Enclosed high-voltage ring main unit

Abstract

The utility model relates to a closed high-voltage ring main unit comprising a cabinet body which can be adjustably placed in a placement area, and a first heat transfer assembly which can transfer heat in a liquid cooling mode is arranged in the cabinet body. One side of the first heat transfer assembly is provided with a porous mounting plate capable of positioning the working position of the electrical equipment in the cabinet body, and a second heat transfer assembly is further arranged in the cabinet cavity space, close to two opposite vertical side edges of the porous mounting plate, of the cabinet body; and the first heat transfer assembly and the second heat transfer assembly are communicated with an external heat dissipation assembly which is arranged on the outer side surface of the cabinet body and can actively and directionally discharge heat through a liquid conveying pipe group, so that a heat transfer circulation loop capable of continuously transferring the heat in the cabinet body is constructed. According to the utility model, dust and steam can be blocked by constructing a closed cabinet cavity environment, and meanwhile, working heat can be continuously and efficiently transferred through the heat transfer circulation loop.

Description

Technical Field

[0001] The utility model relates to the technical field of ring network cabinet equipment, in particular to a closed high-voltage ring network cabinet. Background Art

[0002] The ring main unit is an electrical device that is a group of high-voltage switchgear installed in a steel plate metal cabinet or made into an assembled interval ring main unit. Its core part uses load switches and fuses. It has the advantages of simple structure, small size, low price, improved power supply parameters and performance, and power supply safety. It is widely used in distribution stations and box-type substations in load centers such as urban residential areas, high-rise buildings, large public buildings, and factories and enterprises. The cabinet of the existing ring main unit is usually provided with an air inlet and an air outlet connected to the outside, so that the heat dissipation fan can drive the airflow to flow in a directional manner and pass between the cabinet cavity and the external environment to transfer the heat generated inside the ring main unit when it is working.

[0003] However, the ring main unit with through-holes is very easy to introduce external dust and moisture into the cabinet cavity, causing the electrical accessories to be corroded and damaged in a high temperature and high humidity environment, greatly reducing the service life, and the input of external dust will adhere to the surface of the electrical accessories and hinder the heat dissipation from the inside to the outside, causing the temperature of the electrical accessories to continue to rise, making it very easy to have problems such as failure and short circuit, thereby affecting the actual service life of the electrical accessories, and the excessive heat accumulation will cause the electrical accessories to have local high temperature, which will lead to fire and other hazards when a short circuit occurs. Therefore, in order to improve the dust and moisture resistance, the closed high-voltage ring main unit that seals the cabinet to prevent external moisture from corroding and damaging the high-voltage electrical accessories in the cabinet has gradually begun to be developed. However, the closed chamber formed by the existing closed ring network cabinet cannot effectively discharge the heat generated by the electrical accessories installed inside the cabinet during operation. The continuously accumulated heat will gradually increase the internal temperature of the ring network cabinet. The high temperature cabinet environment will accelerate the aging of the electrical accessories and the lines connected to them. It is also very easy to have disadvantages such as short circuits, which may cause risks such as fire, thereby shortening the actual safe service life of the closed ring network cabinet. Utility Model Content

[0004] The utility model aims to provide a closed high-voltage ring network cabinet which can block dust and moisture by constructing a closed cabinet cavity environment and can also continuously and efficiently transfer working heat through a heat transfer circulation loop, so as to solve the problem that although the existing internal and external connected ring network cabinets can transfer heat and cool the cabinet cavity through the heat dissipation airflow that replaces the inside and outside, the dust and moisture entrained by the airflow will cause corrosion and damage to the electrical accessories inside the cabinet cavity, and the existing closed ring network cabinets lack an effective heat transfer structure, and the single cooling module or heat dissipation fan on the outer wall of the cabinet cannot effectively transfer the heat inside the cabinet cavity, especially the heat gradually diffused outward by the electrical accessories has a long diffusion time in contact with the cabinet wall, resulting in low heat transfer efficiency of the cabinet wall.

[0005] The technical solution adopted by the utility model is: a closed high-voltage ring network cabinet, including a cabinet body that can be adjustably placed in a placement area, a first heat transfer component that can transfer heat by liquid cooling is arranged in the cabinet body, and a porous mounting plate that can locate the working position of the electrical equipment in the cabinet body is arranged on one side of the first heat transfer component, and a second heat transfer component is also arranged in the cabinet cavity space on two opposite vertical sides of the cabinet body close to the porous mounting plate; the first heat transfer component and the second heat transfer component are connected to an external heat dissipation component arranged on the outer side surface of the cabinet body and capable of actively and directionally dissipating heat through an infusion tube group, thereby constructing a heat transfer circulation loop that can continuously transfer heat in the cabinet body.

[0006] According to a preferred embodiment, the external heat dissipation component includes an inlet main pipe, a shunt pipe, side-by-side heat dissipation flat tubes, and an outlet main pipe, wherein the inlet main pipe is connected to the input ends of the plurality of side-by-side heat dissipation flat tubes through the shunt pipe, and the output ends of the side-by-side heat dissipation flat tubes are connected to the outlet main pipe through the shunt pipe, and the inlet main pipe and the outlet main pipe are respectively connected to the same first heat transfer component or the second heat transfer component through different infusion tube groups to form a heat transfer circulation loop.

[0007] According to a preferred embodiment, the plurality of parallel heat dissipation flat tubes are arranged in parallel on the outside of the cabinet in a manner that the plane defined by the plurality of heat dissipation flat tubes is parallel to the side wall of the cabinet, thereby respectively communicating with the first heat transfer component and the second heat transfer component close to the back and side of the cabinet.

[0008] According to a preferred embodiment, heat transfer sheets are arranged at intervals on the two flat tube walls of the side-by-side heat dissipation flat tubes; and the guide fan matrix capable of guiding the heat dissipation airflow to flow in a directional manner in the gaps between adjacent side-by-side heat dissipation flat tubes is also arranged between the side-by-side heat dissipation flat tubes and the side walls of the cabinet.

[0009] According to a preferred embodiment, a driving liquid pump for driving the heat transfer liquid to flow in a directional manner in the heat transfer circulation loop is also provided in the inlet main pipe.

[0010] According to a preferred embodiment, the guide fan matrix includes a mounting frame, a support block and a guide fan, wherein the mounting frame is mounted on the side wall of the cabinet through the support block, and the guide fan is installed in a plurality of interconnected frame spaces of the mounting frame.

[0011] According to a preferred embodiment, the first infusion tube of the infusion tube group is connected to the inflow main tube, and the second infusion tube of the infusion tube group is connected to the outflow main tube.

[0012] According to a preferred embodiment, the first heat transfer component includes a first U-shaped flat tube, a first heat conducting plate, a first flat trapezoidal tube and a first plug-in tube, wherein the upper inlet and the upper outlet of the first U-shaped flat tube are respectively connected to the first flat trapezoidal tube adapted to the flat mouth width thereof, and the axial upper end convergent tube openings of the two first flat trapezoidal tubes are respectively connected to different first plug-in tubes, the first plug-in tube defines the positions of the first U-shaped flat tube and the first flat trapezoidal tube in the cabinet by penetrating the top surface of the cabinet, and the two first plug-in tubes are respectively connected to the first infusion tube and the second infusion tube; the first heat conducting plate which is easy to conduct heat is inlaid on the tube wall of the first U-shaped flat tube facing the porous mounting plate.

[0013] According to a preferred embodiment, the second heat transfer component includes a second U-shaped flat tube, a second heat conducting plate, a second flat trapezoidal tube and a second plug-in tube, wherein the upper inlet and the upper outlet of the second U-shaped flat tube are respectively connected to the second flat trapezoidal tube adapted to the flat mouth width thereof, and the axial upper end convergent tube openings of the two second flat trapezoidal tubes are respectively connected to different second plug-in tubes, the second plug-in tube limits the positions of the second U-shaped flat tube and the second flat trapezoidal tube in the cabinet by penetrating the top surface of the cabinet, and the two second plug-in tubes are respectively connected to the first infusion tube and the second infusion tube; the second heat conducting plate which is easy to conduct heat is inlaid on the tube wall of the second U-shaped flat tube facing the porous mounting plate.

[0014] According to a preferred embodiment, a rotating door panel is provided on a side of the cabinet away from the external heat dissipation component, and the porous mounting plate is supported in a cabinet cavity defined by the cabinet.

[0015] The beneficial effects of the utility model are:

[0016] The first heat transfer component or the second heat transfer component provided in the present application can construct a wide and smooth tube side wall on the side facing the porous mounting plate and the electrical accessories on the plate body thereof, and the tube side wall is inlaid with a heat-conducting plate that is easy to conduct heat, so that the electrical accessories can generate heat and form a heat source while forming a temperature difference with the low-temperature heat-conducting liquid in the tube cavity of the first heat transfer component or the second heat transfer component. As a result, under the action of the temperature difference, the high heat generated by the electrical accessories can be quickly and directionally diffused to the tube cavity of the first heat transfer component or the second heat transfer component, and then absorbed and entrained by the low-temperature heat-conducting liquid and transferred to the outside of the cabinet, so as to improve the efficiency of heat transfer in the cabinet cavity while ensuring the sealing of the cabinet, and solve the defects of low efficiency of self-diffusion heat transfer through the cabinet wall and easy accumulation of heat.

[0017] The side-by-side heat dissipation flat tubes provided in the present application can increase the heat dissipation contact area of ​​the heat-conducting liquid by diverting the heat-conducting liquid after absorbing heat, thereby increasing the surface area of ​​the liquid flow formed by the heat-conducting liquid, thereby improving the heat dissipation efficiency. The present application inlaid heat transfer sheets made of semiconductor heat sinks on the flat tube walls of the side-by-side heat-conducting flat tubes at intervals, so as to facilitate active and rapid heat transfer of the heat-conducting liquid with a large surface area, so that the heat-conducting liquid can be cooled to a specific temperature, and the temperature difference of the cooling is increased. The guide fan matrix provided in the present application can drive the airflow to pass through the gaps between adjacent side-by-side heat-conducting flat tubes in a directional manner, so that the heat transferred to the gaps by the heat transfer sheet can be quickly transferred a second time to avoid the problem of secondary heating of the heat-conducting liquid caused by the accumulation of heat on the outside of the side-by-side heat-conducting flat tubes, and at the same time, it can also reduce the temperature difference on both sides of the heat transfer sheet to improve the efficiency of the heat transfer sheet in rated temperature difference heat transfer. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a preferred closed high-voltage ring network cabinet proposed by the utility model;

[0019] Figure 2 This is a schematic structural diagram of a preferred closed high-voltage ring network cabinet proposed by the utility model in a non-section state;

[0020] Figure 3 It is a side view of an external heat dissipation component of a preferred closed high-voltage ring network cabinet proposed by the utility model;

[0021] Figure 4 It is a top view of an external heat dissipation component of a preferred closed high-voltage ring network cabinet proposed by the utility model.

[0022] Reference numerals list

[0023] 1: cabinet; 2: first heat transfer component; 3: multi-hole mounting plate; 4: second heat transfer component; 5: infusion tube group; 6: external heat dissipation component; 11: rotating door panel; 21: first U-shaped flat tube; 22: first heat conduction plate; 23: first flat trapezoidal tube; 24: first plug-in tube; 41: second U-shaped flat tube; 42: second heat conduction plate; 43: second flat trapezoidal tube; 44: second plug-in tube; 51: first infusion tube; 52: second infusion tube; 61: inlet main pipe; 62: shunt pipe; 63: parallel heat dissipation flat tubes; 64: outlet main pipe; 65: heat transfer sheet; 66: guide fan matrix; 611: driving liquid pump; 661: mounting frame; 662: support block; 663: guide fan. DETAILED DESCRIPTION

[0024] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the utility model will be briefly introduced below in combination with the drawings and the descriptions of the embodiments or the prior art. Obviously, the following descriptions of the structures of the drawings are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] The technical solution provided by the present invention will be described in detail below by way of embodiments with reference to the accompanying drawings. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention. In some examples, some implementation methods are not described or are not described in detail because they belong to existing or conventional technologies.

[0026] In addition, the technical features recorded in this article, or the steps in all methods or processes disclosed, except for mutually exclusive features and / or steps, can also be combined in any suitable manner in one or more embodiments. For those skilled in the art, it is easy to understand that the steps or operation sequence of the methods related to the embodiments provided herein can also be changed. Any order in the drawings and embodiments is only for illustrative purposes and does not imply a requirement to follow a certain order unless it is explicitly stated that a certain order is required.

[0027] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, under reasonable circumstances (not constituting a self-contradiction), include direct and indirect connections (couplings).

[0028] The following is a detailed description with reference to the accompanying drawings.

[0029] Example 1

[0030] The present application provides a closed high-voltage ring main unit, which includes a cabinet body 1, a first heat transfer component 2, a porous mounting plate 3, a second heat transfer component 4, an infusion tube group 5 and an external heat dissipation component 6.

[0031] according to Figure 1-4 In a specific embodiment shown, the cabinet 1 can be adjustably placed in a pre-planned placement area of ​​a load center such as an urban residential area, a high-rise building, a large public building, a factory enterprise, etc. A first heat transfer component 2 capable of transferring heat by liquid cooling is arranged in the cabinet 1. A porous mounting plate 3 capable of locating the working position of the electrical equipment in the cabinet 1 is arranged on one side of the first heat transfer component 2. A second heat transfer component 4 is also arranged in the cabinet cavity space on two opposite vertical sides of the cabinet 1 close to the porous mounting plate 3. The first heat transfer component 2 and the second heat transfer component 4 are connected to an external heat dissipation component 6 arranged on the outer surface of the cabinet 1 and capable of actively and directionally dissipating heat through an infusion tube group 5, thereby constructing a heat transfer circulation loop capable of continuously transferring heat in the cabinet 1. Both the first heat transfer component 2 and the second heat transfer component 4 can make the heat-conducting liquid flow in a directional manner in their tube cavities, thereby absorbing the heat in the cabinet cavity of the cabinet 1 by means of heat conduction, and the heat-absorbing heat-conducting liquid flows through the infusion tube group 5 to the external heat dissipation component 6 located outside the cabinet 1, thereby completing the heat dissipation and cooling of the heat-conducting liquid through the external heat dissipation component 6, especially the external heat dissipation component 6 can quickly reduce the temperature of the heat-conducting liquid through active heat transfer, so as to efficiently transfer the temperature of the heat-conducting liquid while allowing the heat-conducting liquid to be cooled to room temperature or below normal temperature, so that the heat-conducting liquid after heat dissipation can be input into the first heat transfer component 2 or the second heat transfer component 4 for a second time through the infusion tube group 5, thereby efficiently completing the secondary heat transfer to achieve cyclic continuous heat transfer. The first heat transfer component 2 or the second heat transfer component 4 provided in the present application can construct a wide and smooth tube side wall on the side facing the porous mounting plate 3 and the electrical accessories on the plate body thereof, and the tube side wall is inlaid with a heat-conducting plate material that is easy to conduct heat, so that when the electrical accessories generate heat and form a heat source, a temperature difference can be formed with the low-temperature heat-conducting liquid in the tube cavity of the first heat transfer component 2 or the second heat transfer component 4. As a result, under the action of the temperature difference, the high heat generated by the electrical accessories can be quickly and directionally diffused to the tube cavity of the first heat transfer component 2 or the second heat transfer component 4, and then absorbed and entrained by the low-temperature heat-conducting liquid and transferred to the outside of the cabinet 1, so as to improve the efficiency of heat transfer in the cabinet cavity while ensuring the sealing of the cabinet 1, and solve the defects of low efficiency of self-diffusion heat transfer through the cabinet wall and easy accumulation of heat.

[0032] Preferably, a rotating door panel 11 is provided on the side of the cabinet 1 away from the external heat dissipation component 6, and the porous mounting plate 3 is supported in the cabinet cavity defined by the cabinet 1. The present application facilitates opening the cabinet cavity of the cabinet 1 by providing a rotating door panel 11, so as to facilitate the installation of the first heat transfer component 2, the porous mounting plate 3, and the second heat transfer component 4, and also facilitates the installation of electrical accessories on the porous mounting plate 3. The porous mounting plate 3 provided in the present application has a dense array of through holes, so that the electrical accessories can be positioned and plugged into the porous mounting plate 3 through the socket, and the electrical accessories can also be dissipated from the back through the through holes, so that the first heat transfer component 2 can absorb and transfer the working heat passing through the porous mounting plate 3. The top or side of the cabinet 1 provided in the present application is also provided with a plurality of through holes through which power supply cables pass, and a sealing ring is provided in the through hole, so that the through hole can be sealed while the external wires and cables are connected to the electrical accessories to ensure the sealing of the cabinet cavity.

[0033] Preferably, the first heat transfer assembly 2 comprises a first U-shaped flat tube 21, a first heat conducting plate 22, a first flat trapezoidal tube 23 and a first plug-in tube 24. Preferably, the upper inlet and the upper outlet of the first U-shaped flat tube 21 are respectively connected with a first flat trapezoidal tube 23 adapted to the flat mouth width thereof. Further preferably, the axial upper end convergent tube openings of the two first flat trapezoidal tubes 23 connecting the upper inlet and the upper outlet of the first U-shaped flat tube 21 are respectively connected with different first plug-in tubes 24. Specifically, the convergent tube opening refers to a circular tube opening profile formed by gradually transforming the tube opening end from a wider flat tube body to a cylindrical tube body. Preferably, the first plug-in tube 24 defines the position of the first U-shaped flat tube 21 and the first flat trapezoidal tube 23 in the cabinet by penetrating the top surface of the cabinet. Further preferably, the two first plug-in tubes 24 are respectively connected with the first infusion tube 51 and the second infusion tube 52 to define the inflow channel and the outflow channel of the heat transfer liquid. Preferably, a first heat-conducting plate 22 that is easy to conduct heat is embedded on the tube wall of the first U-shaped flat tube 21 facing the porous mounting plate 3. Specifically, the first U-shaped flat tube 21 is suspended in the cabinet 1 in a manner parallel to the back of the cabinet 1 by positioning the first flat trapezoidal tube 23 and the first plug-in tube 24. Preferably, the first heat-conducting plate 22 is made of a heat-conducting silicone sheet or an aluminum sheet that is easy to conduct heat. The first U-shaped flat tube 21 provided in the present application can construct a flat tube body with a large tube wall surface (large longitudinal width of the tube cavity) and a small transverse width of the tube cavity and a limited cross-sectional area of ​​the tube body, so as to increase the contact and heat conduction area while increasing the tube wall area, thereby improving the heat absorption efficiency of the heat-conducting liquid in its tube cavity and improving the heat transfer efficiency, so as to better absorb the heat diffused in the cabinet cavity. The first flat trapezoidal tube 23 can transform the cylindrical tube body into a flat-mouth tube body, so as to limit the flow section of the heat-conducting liquid, change the cross-sectional shape of the liquid flow formed by the heat-conducting liquid, increase the contact area between the heat-conducting liquid and the heat in the cabinet cavity, and increase the absorption of self-diffusion heat, thereby effectively reducing the cabinet cavity temperature and alleviating the increase in cabinet cavity temperature caused by the working temperature rise of electrical accessories, so as to limit and maintain the working temperature state of the electrical accessories and improve their working stability.

[0034] Preferably, the second heat transfer assembly 4 includes a second U-shaped flat tube 41, a second heat conducting plate 42, a second flat trapezoidal tube 43 and a second plug-in tube 44. Preferably, the upper inlet and the upper outlet of the second U-shaped flat tube 41 are respectively connected to a second flat trapezoidal tube 43 that matches the flat mouth width. Further preferably, the axial upper end convergence tube openings of the two second flat trapezoidal tubes 43 are respectively connected to different second plug-in tubes 44. Preferably, the second plug-in tube 44 defines the positions of the second U-shaped flat tube 41 and the second flat trapezoidal tube 43 in the cabinet by penetrating the top surface of the cabinet. Further preferably, the two second plug-in tubes 44 are respectively connected to the first infusion tube 51 and the second infusion tube 52. Preferably, a second heat conducting plate 42 that is easy to conduct heat is inlaid on the tube wall of the second U-shaped flat tube 41 facing the porous mounting plate 3. Specifically, the second U-shaped flat tube 41 is suspended in the cabinet 1 in parallel with the side of the cabinet 1 by positioning the second flat trapezoidal tube 43 and the second plug tube 44. Preferably, the second heat conducting plate 42 is made of a heat-conducting silicone sheet or an aluminum sheet that is easy to conduct heat. The second U-shaped flat tube 41 provided in the present application can construct a flat tube body with a large tube wall surface (large longitudinal width of the tube cavity) and a small transverse width of the tube cavity and a limited cross-sectional area of ​​the tube body, so as to increase the contact and heat conduction area while increasing the tube wall area, thereby improving the heat absorption efficiency of the heat-conducting liquid in its tube cavity and improving the heat transfer efficiency, so as to better absorb the heat diffused in the cabinet cavity. The second flat trapezoidal tube 43 can transform the cylindrical tube body into a flat-mouth tube body, so as to limit the flow section of the heat transfer liquid, change the cross-sectional shape of the liquid flow formed by the heat transfer liquid, increase the contact area between the heat transfer liquid and the heat in the cabinet cavity, and increase the absorption of self-diffusion heat, thereby effectively reducing the cabinet cavity temperature and alleviating the increase in cabinet cavity temperature caused by the working temperature rise of electrical accessories, so as to limit and maintain the working temperature state of the electrical accessories and improve their working stability.

[0035] Preferably, the first infusion tube 51 of the infusion tube group 5 is connected to the inflow main pipe 61. Preferably, the second infusion tube 52 of the infusion tube group 5 is connected to the outflow main pipe 64. Further preferably, one end of the first infusion tube 51 away from the inflow main pipe 61 is connected to the output end of the first U-shaped flat tube 21 or the second U-shaped flat tube 41. Further preferably, one end of the second infusion tube 52 away from the outflow main pipe 64 is connected to the input end of the first U-shaped flat tube 21 or the second U-shaped flat tube 41.

[0036] Preferably, the external heat dissipation component 6 includes an inlet main pipe 61, a shunt pipe 62, parallel heat dissipation flat tubes 63, and an outlet main pipe 64. Preferably, the inlet main pipe 61 is connected to the input ends of the plurality of parallel heat dissipation flat tubes 63 through the shunt pipe 62. Further preferably, the output ends of the parallel heat dissipation flat tubes 63 are connected to the outlet main pipe 64 through the shunt pipe 62. Preferably, the inlet main pipe 61 and the outlet main pipe 64 are respectively connected to the same first heat transfer component 2 or the second heat transfer component 4 through different infusion tube groups 5 to construct a heat transfer outflow circulation loop. Preferably, the plurality of parallel heat dissipation flat tubes 63 arranged in parallel are arranged on the outside of the cabinet 1 in a manner that the plane defined by them is parallel to the side wall of the cabinet 1, so as to be respectively connected to the first heat transfer component 2 and the second heat transfer component 4 close to the back and side of the cabinet 1. Preferably, heat transfer sheets 65 are arranged at intervals on the two flat tube walls of the parallel heat dissipation flat tubes 63, so that in the process of the heat transfer liquid flowing in the tube cavity in a directional manner, the heat transfer and cooling of the heat transfer liquid is realized by the heat transfer sheet 65. Preferably, a guide fan matrix 66 capable of guiding the heat dissipation airflow to flow directional in the gaps between adjacent parallel heat dissipation flat tubes 63 is also provided between the parallel heat dissipation flat tubes 63 and the side walls of the cabinet 1. The parallel heat dissipation flat tubes 63 provided in the present application can increase the heat dissipation contact area of ​​the heat transfer liquid by diverting the heat transfer liquid after absorbing heat, thereby increasing the surface area of ​​the liquid flow formed by the heat transfer liquid, thereby improving the heat dissipation efficiency. The present application inlaid heat transfer sheets 65 made of semiconductor heat sinks at intervals on the flat tube walls of the parallel heat dissipation flat tubes 63, so as to facilitate active and rapid heat transfer of the heat transfer liquid with a large surface area, so that the heat transfer liquid can be cooled to a specific temperature, and the temperature difference of the cooling is increased. The guide fan matrix 66 provided in the present application can drive the air flow to pass through the gaps between adjacent side-by-side heat dissipation flat tubes 63, so that the heat transferred to the gaps by the heat transfer sheet 65 can be quickly transferred a second time to avoid the problem of heat accumulation outside the side-by-side heat dissipation flat tubes 63 and causing secondary heating of the heat transfer fluid. At the same time, it can also reduce the temperature difference on both sides of the heat transfer sheet 65 to improve the efficiency of the heat transfer sheet 65 in performing rated temperature difference heat transfer.

[0037] Preferably, a driving liquid pump 611 for driving the heat transfer liquid to flow in a directional manner in the heat transfer circulation loop is also provided in the inlet main pipe 61. Preferably, the guide fan matrix 66 includes a mounting frame 661, a support block 662 and a guide fan 663. Preferably, the mounting frame 661 is mounted on the side wall of the cabinet 1 through the support block 662. Specifically, guide fans 663 are installed in a plurality of interconnected frame spaces of the mounting frame 661 to drive the heat dissipation airflow to pass through the gaps between adjacent parallel heat dissipation flat tubes 63 in a manner away from the side wall of the cabinet 1, thereby taking away the heat transferred to the gaps by the heat transfer sheet 65.

[0038] The present utility model is not limited to the above optional implementation modes. Anyone can derive other various forms of products under the inspiration of the present utility model. However, no matter what changes are made in the shape or structure, all technical solutions that fall within the scope of the claims of the present utility model fall within the protection scope of the present utility model. Those skilled in the art should understand that the present utility model specification and its drawings are illustrative and do not constitute limitations on the claims. The protection scope of the present utility model is defined by the claims and their equivalents. Throughout the text, the features guided by "preferably" are only an optional method and should not be understood as having to be set. Therefore, the applicant reserves the right to abandon or delete the relevant preferred features at any time.

Claims

1. A closed high-voltage ring main unit, comprising a cabinet body (1) that can be adjustably placed in a placement area, characterized in that: A first heat transfer component (2) capable of transferring heat by means of liquid cooling is arranged in the cabinet (1), and a multi-hole mounting plate (3) capable of locating the working position of the electrical equipment in the cabinet (1) is arranged on one side of the first heat transfer component (2). A second heat transfer component (4) is also arranged in the cabinet cavity space of the cabinet body (1) near two opposite vertical sides of the porous mounting plate (3); The first heat transfer component (2) and the second heat transfer component (4) are connected to an external heat dissipation component (6) arranged on the outer surface of the cabinet (1) through an infusion tube group (5), thereby constructing a heat transfer circulation loop capable of continuously transferring heat within the cabinet (1).

2. The closed high-voltage ring main unit according to claim 1, characterized in that: The external heat dissipation assembly (6) comprises an inlet main pipe (61), a flow distribution pipe (62), parallel heat dissipation flat pipes (63), and an outlet main pipe (64), wherein: The inlet main pipe (61) is connected to the input ends of a plurality of parallel heat dissipation flat pipes (63) through the flow divider pipe (62). The output ends of the parallel heat dissipation flat tubes (63) are connected to the outflow main pipe (64) via the diverter pipe (62). The inlet main pipe (61) and the outlet main pipe (64) are respectively connected to the same first heat transfer component (2) or the second heat transfer component (4) through different infusion tube groups (5) to form a heat transfer outflow circulation loop.

3. The closed high-voltage ring main unit according to claim 2, characterized in that: A plurality of parallel heat dissipation flat tubes (63) are arranged on the outside of the cabinet (1) in a manner such that the plane defined by the flat tubes is parallel to the side wall of the cabinet (1), thereby being respectively connected to the first heat transfer component (2) and the second heat transfer component (4) close to the back and side of the cabinet (1).

4. The closed high-voltage ring main unit according to claim 3, characterized in that: Heat transfer sheets (65) are arranged at intervals on the two flat tube walls of the parallel heat dissipation flat tubes (63); A guide fan matrix (66) capable of guiding the heat dissipation airflow to flow in a directional manner in the gaps between adjacent side-by-side heat dissipation flat tubes (63) is also provided between the side walls of the cabinet (1).

5. The closed high-voltage ring main unit according to claim 4, characterized in that: A driving liquid pump (611) for driving the heat transfer liquid to flow in a directional manner in the heat transfer circulation loop is also provided in the inlet main pipe (61).

6. The closed high-voltage ring main unit according to claim 5, characterized in that: The air guide fan matrix (66) comprises a mounting frame (661), a support block (662) and an air guide fan (663), wherein: The installation frame (661) is installed on the side wall of the cabinet (1) through the support block (662), and the guide fan (663) is installed in a plurality of mutually connected frame spaces of the installation frame (661).

7. The closed high-voltage ring main unit according to claim 6, characterized in that: The first infusion tube (51) of the infusion tube group (5) is connected to the inflow main tube (61), and the second infusion tube (52) of the infusion tube group (5) is connected to the outflow main tube (64).

8. The closed high-voltage ring main unit according to claim 7, characterized in that: The first heat transfer component (2) comprises a first U-shaped flat tube (21), a first heat conducting plate (22), a first flat trapezoidal tube (23) and a first plug-in tube (24), wherein: The upper inlet and the upper outlet of the first U-shaped flat tube (21) are respectively connected to the first flat trapezoidal tube (23) adapted to the width of the flat opening, and the axial upper end convergence tube openings of the two first flat trapezoidal tubes (23) are respectively connected to different first plug-in tubes (24). The first plug-in tube (24) defines the positions of the first U-shaped flat tube (21) and the first flat trapezoidal tube (23) in the cabinet by penetrating the top surface of the cabinet, and the two first plug-in tubes (24) are respectively connected to the first infusion tube (51) and the second infusion tube (52); The first heat-conducting plate (22) which is easy to conduct heat is embedded on the tube wall of the first U-shaped flat tube (21) facing the porous mounting plate (3).

9. The closed high-voltage ring main unit according to claim 8, characterized in that: The second heat transfer component (4) comprises a second U-shaped flat tube (41), a second heat conducting plate (42), a second flat trapezoidal tube (43) and a second plug-in tube (44), wherein: The upper inlet and the upper outlet of the second U-shaped flat tube (41) are respectively connected to the second flat trapezoidal tube (43) whose flat opening width is matched with the second flat trapezoidal tube (43), and the axial upper end convergence tube openings of the two second flat trapezoidal tubes (43) are respectively connected to different second plug-in tubes (44). The second plug-in tube (44) defines the positions of the second U-shaped flat tube (41) and the second flat trapezoidal tube (43) in the cabinet by penetrating the top surface of the cabinet, and the two second plug-in tubes (44) are respectively connected to the first infusion tube (51) and the second infusion tube (52); The second heat conducting plate (42) which is easy to conduct heat is embedded on the tube wall of the side of the second U-shaped flat tube (41) facing the porous mounting plate (3).

10. The closed high-voltage ring main unit according to claim 9, characterized in that: A rotating door panel (11) is provided on a side of the cabinet (1) away from the external heat dissipation component (6), and the multi-hole mounting plate (3) is supported in a cabinet cavity defined by the cabinet (1).

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