CN109462163B

CN109462163B - Selective ventilation ring main unit

Info

Publication number: CN109462163B
Application number: CN201910025783.1A
Authority: CN
Inventors: 陈羽; 王敬华; 张新慧
Original assignee: Shandong University of Technology
Current assignee: Shandong University of Technology
Priority date: 2019-01-11
Filing date: 2019-01-11
Publication date: 2020-07-03
Anticipated expiration: 2039-01-11
Also published as: CN109462163A

Abstract

The invention discloses a selective ventilation ring main unit, which comprises ring main unit monomers, wherein each ring main unit monomer comprises an external shell and an internal accommodating space formed by the shells, at least one ring main unit monomer is arranged, and when more than two ring main unit monomers are arranged, the ring main unit monomers are connected with each other through a connecting component to form a row, so that the selective ventilation ring main unit is formed together; the top of casing is the roof, the thermovent has on the roof, the upper portion of roof still is stamped the top cap, one side of top cap with the edge hinge of roof, the opposite side can be opened or the lid closes through the upset the thermovent. The invention can selectively ventilate and radiate, and can jack the top cover through the top support component when radiating is needed to form a stable structure; when the heat dissipation is not needed, the top cover can be put down through the top support assembly to form a seal, so that external dust is prevented from entering the heat dissipation device, and the heat dissipation device has a protection effect.

Description

Selective ventilation ring main unit

Technical Field

The invention relates to the technical field of distribution automation, in particular to a selective ventilation ring main unit.

Background

The distribution network automation is a system which utilizes the technical means of computer technology, automatic control technology, electronic technology, communication technology, new high-performance distribution equipment and the like to carry out offline and online intelligent monitoring management on a distribution network so as to enable the distribution network to be always in a safe, reliable, high-quality, economic and efficient optimal operation state. In a distribution network automation system, various remote detection and control units installed on a medium and low voltage distribution network are distribution automation terminals, including remote terminals such as a DTU, a TTU, an FTU and the like. The DTU is generally installed at a conventional ring main unit, an outdoor small-sized switching station, a box-type substation and the like, and is used for collecting and calculating position signals, voltage, current, active power, reactive power, power factors, electric energy and other data of the switch equipment, performing switching-on and switching-off operation on the switch, and realizing fault identification and isolation of a feeder switch and recovery power supply of a non-fault section.

The conventional ring main unit is of a common box structure, namely an integrated box body. The looped network cabinet needs to be constructed according to a scheme of a user once and is free of fixed cabinet types. The production cycle of the ring main unit with the box-type structure is long, the size is large, the weight is large, the operation process of each process is inconvenient due to the large size, the ring main unit with the box-type structure is poor in flexibility due to the fact that the size is single and the modular design is omitted, the ring main unit cannot be assembled fully according to actual needs, and the whole or local replacement is difficult to carry out.

The ring main unit generally has a plurality of ventilation openings (heat dissipation openings) arranged in an array on the main unit body, and the ventilation openings are only single through holes without special structures. Therefore, on one hand, external dust is easy to enter and accumulate for a long time, and the cleanness of the inside is influenced, even the normal work of the circuit is influenced; on the other hand, due to the upward flow of hot air, the optimal position for heat dissipation should be the top position, but considering the external safety protection, the bottom position of the side or front of the cabinet body that conventional ventilation openings set up will influence the heat dissipation efficiency in the cabinet body like this.

Disclosure of Invention

This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. In this section, as well as in the abstract and the title of the invention of this application, simplifications or omissions may be made to avoid obscuring the purpose of the section, the abstract and the title, and such simplifications or omissions are not intended to limit the scope of the invention.

The present invention has been made in view of the above and/or other problems occurring in the conventional ring main units.

Therefore, one of the objects of the present invention is to provide a selective ventilation ring main unit, which can selectively perform ventilation and heat dissipation.

In order to solve the technical problems, the invention provides the following technical scheme: a selective ventilation ring main unit comprises ring main unit bodies, wherein each ring main unit body comprises an outer shell and an inner accommodating space formed by the shells, at least one ring main unit body is arranged, and when more than two ring main unit bodies are arranged, the ring main unit bodies are connected with each other through a connecting component to form a row, so that the selective ventilation ring main unit is formed together; the top of casing is the roof, the thermovent has on the roof, the upper portion of roof still is stamped the top cap, one side of top cap with the edge hinge of roof, the opposite side can be opened or the lid closes through the upset the thermovent.

As a preferred scheme of the selective ventilation ring main unit of the present invention, wherein: the top bracing assembly comprises a rotating part and a mounting fixing plate, wherein the rotating part comprises a linkage rod and a top bracing rod; the rear part of the shell is a rear side plate, and the rotating piece is fixed at the upper part of the inner side surface of the rear side plate through the mounting and fixing plate; the connecting rod penetrates through the mounting fixing plate and the rear side plate, and a driving part is fixed at the outer end of the connecting rod; the inner end of the tie bar and the lower end of the top stay bar are vertically fixed to each other, and the top stay bar can rotate around the tie bar as an axis by driving the driving part to rotate outside the casing; the top plate is provided with an allowable slot matched with the top stay, the upper end of the top stay penetrates through the allowable slot, is propped against the lower surface of the top cover, and can jack up or put down the top cover along with the rotation of the linkage rod.

As a preferred scheme of the selective ventilation ring main unit of the present invention, wherein: the mounting fixing plate is provided with a first limiting column and a second limiting column, and can block the rotation of the top supporting rod; when the top support rod rotates to the first limiting column, the top support rod cannot rotate continuously due to the obstruction of the first limiting column, and the top cover is jacked up by the top support rod at the moment, so that the heat dissipation opening is opened by the top cover; when the top support rod rotates to the second limiting column, the top support rod cannot rotate continuously due to the obstruction of the second limiting column, and the top cover is put down by the top support rod at the moment, so that the heat dissipation opening is covered by the top cover.

As a preferred scheme of the selective ventilation ring main unit of the present invention, wherein: the top support component also comprises an adaptive rod, one end of the adaptive rod is hinged with the lower end of the top support rod, and the other end of the adaptive rod is fixedly connected with the non-end part of the top support rod through an extension spring; the mounting fixing plate is also provided with a third limiting column and a fourth limiting column which can block the rotation of the adapting rod; when the top support rod rotates to the first limit column, the adapter rod is pulled by the extension spring to rotate to the third limit column, the third limit column blocks the adapter rod from continuing to rotate, and an included angle between the adapter rod and the top support rod is larger than 180 degrees; when the top support rod rotates to the second limit column, the adapter rod is pulled by the extension spring to rotate to the fourth limit column, the fourth limit column blocks the adapter rod from continuing to rotate, and an included angle between the adapter rod and the top support rod is smaller than 180 degrees.

As a preferred scheme of the selective ventilation ring main unit of the present invention, wherein: the shell comprises a first side plate and a second side plate which are parallel to each other and are connected with the rear side face through a rear side plate, the top face through a top plate and the bottom face through a bottom plate.

As a preferred scheme of the selective ventilation ring main unit of the present invention, wherein: one side of the accommodating space is provided with an opening, and the opening is provided with a covering assembly.

As a preferred scheme of the selective ventilation ring main unit of the present invention, wherein: the connecting assembly comprises a pulling module and a matching module, the pulling module is arranged at the top edge and the bottom edge of the front side surface and the rear side surface of each single ring main unit, and the matching module is arranged at the edge position of the other side of each single ring main unit relative to the pulling module and is in one-to-one correspondence with each pulling module; one ring main unit can be connected with each matching module of the other adjacent ring main unit through each pulling module of the ring main unit to form a combination; the traction module comprises a base piece, a driving piece and a driven piece; the pulling module is fixed on the ring main unit through the base piece; one end of the driving piece is hinged with the base piece to form a first hinge point, and the other end of the driving piece is an operating end; one end of the driven part is hinged to the driving part to form a second hinge point, and the other end of the driven part is a connecting end; the link can hook and face the cooperation module on the edge ring main unit monomer, when clockwise promotes when the operation end, can connect two adjacent ring main unit monomers.

As a preferred scheme of the selective ventilation ring main unit of the present invention, wherein: the matching module is of a hook-shaped structure, the driven piece is of a frame structure with a rounded rectangular outline, and the inner end of the driven piece is hinged with the non-end part of the driving piece; the connecting end of the driven piece is coated with a circle of deformation layer, and when the matching module hooks the connecting end, the deformation layer can be extruded with the matching module and deform.

As a preferred scheme of the selective ventilation ring main unit of the present invention, wherein: the pulling module further comprises an elastic adapter; the driving part is provided with a first fixing buckle, the driven part is provided with a second fixing buckle, and the distance between the first fixing buckle and the first hinge point is greater than the distance between the second hinge point and the first hinge point; one end of the elastic adapter is fixed on the first fixing buckle, and the other end of the elastic adapter is fixed on the second fixing buckle.

As a preferred scheme of the selective ventilation ring main unit of the present invention, wherein: when the operating end is pushed clockwise until the deformation layer begins to deform, the horizontal included angle between the driving part and the driven part is smaller than 180 degrees; when the operating end is pushed into contact with the surface of the shell, the horizontal included angle between the driving piece and the driven piece is larger than 180 degrees.

The invention has the beneficial effects that: according to the invention, the ring main units are subjected to modular design and combined installation type design, so that a plurality of ring main unit monomers can be combined and used at will, and a constructor can flexibly select one or more ring main unit monomers to be matched and combined for use according to the actual conditions on site, therefore, the flexibility and flexibility are high, and the replacement is convenient. Because the modular ring main unit is small in size, light in weight and small in occupied area, the modular ring main unit is beneficial to batch production and batch transportation of factories, and the production period is shortened. Meanwhile, the ventilation and heat dissipation can be selectively carried out, and when heat dissipation is needed, the top cover can be jacked up through the jacking component to form a stable structure; when the heat dissipation is not needed, the top cover can be put down through the top support assembly to form a seal, so that external dust is prevented from entering the heat dissipation device, and the heat dissipation device has a protection effect.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise. Wherein:

fig. 1 is a structural diagram of a single ring main unit according to a first embodiment of the present invention and a detailed partial structural diagram thereof.

Fig. 2 is an overall structural diagram and a partial structural detail diagram of the ring main unit according to the first embodiment of the present invention after the ring main unit is assembled and connected.

Fig. 3 is an overall structure view of a drawing module according to a first embodiment of the present invention.

Fig. 4 is a schematic view illustrating locking of the connecting assembly according to the first embodiment of the present invention.

Fig. 5 is a side view of a drawing module according to a first embodiment of the invention, a cross-sectional view thereof, and a detailed view of the internal structure of the handling end.

Fig. 6 is a structural view of a top bracing assembly according to a second embodiment of the invention.

Fig. 7 is a view of the mounting position of the jacking assembly according to the second embodiment of the present invention and its partial detail.

Fig. 8 is a structural view of a rotary member according to a second embodiment of the present invention.

Fig. 9 is a rear view of a top brace assembly according to a second embodiment of the present invention.

FIG. 10 is an elevation view, and a partial detail view, of a second embodiment of a jacking assembly for jacking up and lowering down a top cap.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.

Furthermore, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.

Referring to fig. 1 to 5, a first embodiment of the present invention provides a modular ring main unit. As can be seen from figure 1, the modular ring main unit can be formed by connecting a plurality of ring main unit monomers which can be used independently in parallel, each ring main unit monomer is an independent small-sized ring main unit, and the plurality of ring main unit monomers can be sequentially assembled and arranged in a transverse mode to form a large modular ring main unit. Thus, it has: can be combined at will, is convenient to replace, has short production period, high flexibility and maneuverability and the like.

The ring main unit includes an outer housing 100 and an inner accommodating space M formed by the housing 100. The housing 100 is a single shell of the ring main unit, and has an accommodating space M therein, a front side opening of the accommodating space M, and a cover assembly 200 is disposed at the opening to implement closing or temporary opening.

The cover assembly 200 of the present invention is a single-leaf vertical hinged door, one side edge of which is hinged to one side edge of the "opening", and the other side of the cover assembly 200 is connected to the other side of the "opening" through the locking assembly 300, so that the cover assembly 200 can open or close the opening of the housing 100. The locking assembly 300 may be a conventional door lock or other type of switch lock that is capable of closing and locking the closure assembly 200.

Further, the housing 100 includes a first side plate 101 and a second side plate 102, which are parallel to each other. The housing 100 further includes a rear side plate 103, a top plate 104, and a bottom plate 105. The first side plate 101 and the second side plate 102 are connected to the rear side surface of the cabinet through a rear side plate 103, the top surface of the cabinet through a top plate 104, and the bottom surface of the cabinet through a bottom plate 105.

The ring main unit is provided with at least one ring main unit, and when only one ring main unit is arranged, the ring main unit is used as a single ring main unit; when the ring main unit has more than two, each ring main unit is connected with each other through the connecting assembly 400 to form a row, and the modular ring main unit is formed together.

The connecting assembly 400 has the function of connecting the ring main unit units adjacent to each other. Each group of two adjacent ring main units are combined under the connection of the plurality of connection assemblies 400. The connecting assembly 400 comprises a pulling module 401 and a matching module 402, wherein the pulling module 401 is a linkage structure used for connecting the single body of the edge-facing looped network cabinet, and the matching module 402 is a hook body used for matching with the pulling module 401 of the single body of the edge-facing looped network cabinet. Because a plurality of looped netowrk cabinet monomer structures are the same, and can make up the connection in proper order after arranging wantonly, consequently for guaranteeing the orderliness, every looped netowrk cabinet monomer all includes a plurality of coupling assembling 400, and drawing module 401 and cooperation module 402 wherein are the same in quantity, the one-to-one.

Specifically, the pulling modules 401 are disposed at the top edge and the bottom edge of the front side and the back side of each ring main unit, and are uniformly fixed at one side edge of the front side (or the back side), and the matching module 402 is disposed at the other side edge of the ring main unit relative to the pulling modules 401, and forms a one-to-one correspondence with each pulling module 401. That is, each single ring main unit has multiple sets of pulling modules 401 and matching modules 402, the pulling module 401 of its own is used to connect with the matching module 402 of the single ring main unit adjacent to one side, and the matching module 402 of its own is used to connect with the pulling module 401 of the single ring main unit adjacent to the other side.

The pulling module 401 comprises a base member 401a, a driving member 401b and a driven member 401 c. The base member 401a may be a fixed hinge support, and the whole pulling module 401 is fixed at the top edge and the bottom edge of the ring main unit (the front and the rear side surfaces are all provided) through the base member 401 a. The driving member 401b is rod-shaped, one end of which is hinged to the base member 401a to form a first hinge point J-1, and the other end is an operating end 401b-1, and the operating end 401b-1 is used as an external driving action point. One end of the driven part 401c is hinged to the driving part 401b (two end positions of the non-driving part 401b) to form a second hinge point J-2, and the other end is a connecting end 401c-1 for connecting with the matching module 402 of the adjacent edge ring main unit, which can hook the matching module 402 on the adjacent edge ring main unit, and when the operating end 401b-1 is pushed clockwise, two adjacent ring main units can be connected, and the 'clockwise' described in the invention takes the top view of the whole modular ring main unit as a reference.

In the present invention, the mating module 402 is a hook-like structure and the follower 401c may be a frame structure having a rounded rectangular profile in a vertical plane. The inner end of the driven member 401c is hinged to the non-end position of the driving member 401b (e.g., the middle position or the right and left positions of the driving member 401b), and the outer end is hooked on the adjacent mating module 402 through its frame.

Preferably, the connecting end 401c-1 of the driven member 401c is covered with a ring of deformation layer 401c-2, and the deformation layer 401c-2 is made of a flexible material capable of deforming under pressure, such as a rubber layer. When the mating module 402 hooks the connection end 401c-1 and simultaneously pushes the operation end 401b-1 of the driving member 401b clockwise, the deformation layer 401c-2 can be pressed with the mating module 402 and deformed.

Further, the pulling module 401 further comprises elastic adapters 401 d. In addition, the driving member 401b has a first fixing buckle 401b-2, and the driven member 401c has a second fixing buckle 401 c-3. The driving member 401b is divided into a first section D-1 and a second section D-2 by a second hinge point J-2, wherein the section between the first hinge point J-1 and the second hinge point J-2 is the first section D-1, and the section between the second hinge point J-2 and the end of the operating end 401b-1 is the second section D-2. In the present invention, the first holder buckle 401b-2 is disposed on the second section D-2 such that the distance between the first holder buckle 401b-2 and the first hinge point J-1 is greater than the distance between the second hinge point J-2 and the first hinge point J-1. The second holder buckle 401c-3 is fixed in a non-end position on the follower 401 c. The elastic adaptor 401D is fixed to the first fixing buckle 401b-2 at one end and the second fixing buckle 401c-3 at the other end, and the elastic adaptor 401D in the present invention can be an extension spring, in order to ensure that the elastic adaptor 401D can perform corresponding displacement in a self-adaptive and unimpeded manner during the process of driving the pulling module 401 to move integrally by the driving member 401b, the first section D-1 and a part of the second section D-2 of the driving member 401b are hollow in the middle to allow the elastic adaptor 401D to perform corresponding movement in a "hollow structure". The first fixing buckle 401b-2 is a short column structure fixed between two hollow interlayers of the driving part 401 b; the second fixing buckle 401c-3 is a short column structure fixed between the upper and lower parallel frames of the driven member 401 c.

The locking process of the connection assembly 400 is as follows:

the connecting end 401c-1 of the driven piece 401c is hooked on the matching module 402 of the adjacent side looped network cabinet monomer (only contact and no extrusion effect is realized at the moment), and then the operating end 401b-1 is pushed clockwise until the deformation layer 401c-2 begins to be pressed and deformed, and the horizontal included angle between the driving piece 401b and the driven piece 401c is smaller than 180 degrees. If the operating end 401b-1 is pushed clockwise, the required pushing force is gradually increased, the pulling tension applied to the driven member 401c is correspondingly increased, and the deformation space of the deformation layer 401c-2 and the driven member 401c enables the operating end 401b-1 to be pushed continuously. In this process, the elastic adapter 401d is also gradually elongated.

When the operating end 401b-1 is further pushed clockwise until the first hinge point J-1, the second hinge point J-2 and the deformation layer 401c-2 are collinear, the pulling force applied to the follower 401c reaches a maximum (the deformation degree of the deformation layer 401c-2 also reaches a maximum), and at this time, the elastic adapter 401d is also pulled to the maximum. If the operating end 401b-1 is pushed clockwise continuously, in the subsequent process, the driven member 401c gradually returns to the normal state, the pulling force is released, the deformation degree of the deformation layer 401c-2 is reduced accordingly, the required driving force is reduced rapidly, and even the operating end 401b-1 automatically rotates clockwise under the condition that the driven member 401c and the deformation layer 401c-2 return to the normal state until the operating end 401b-1 touches the surface of the shell 100, so that the operating end 401b-1 cannot rotate continuously. At this time, the coupling assembly 400 is integrally formed in a locked state, and the driving member 401b cannot rotate counterclockwise by itself (because it will be subjected to a greater tension) unless it is driven counterclockwise by the outside. In the locked state, the horizontal angle between the driving member 401b and the driven member 401c is greater than 180 °. Preferably, the elastic adapter 401d can pull the driving member 401b and the driven member 401c, and has a function of preventing the loosening rotation.

Further, the connecting assembly 400 further includes a safety module 403, wherein the safety module 403 has a hook shape and an outer surface of the safety module is a convex curved surface.

The handle end 401b-1 may be cylindrical with a hollow first chamber 401b-11 and a second chamber 401b-12 therein. The first chamber 401b-11 is located at the outer end of the second chamber 401b-12 and has a larger inner diameter than the second chamber 401b-12, forming a step at the interface between the two.

The first chamber 401b-11 is inserted with a telescopic member 401b-13, the telescopic member 401b-13 is a cylindrical structure, an inner end of the telescopic member is inserted into the inner second chamber 401b-12, an outer end of the telescopic member passes through the first chamber 401b-11, and an operation end 401b-1 is exposed (the outer end of the first chamber 401b-11 is provided with a corresponding socket communicated with the outside). In addition, the telescopic part 401b-13 is provided with a limiting ring 401b-14 positioned in the range of the first cavity 401b-11, and the limiting ring 401b-14 is in a ring shape, is larger than the maximum size of a socket of the outer end head of the first cavity 401b-11 and is slightly smaller than the inner diameter of the first cavity 401b-11, so that the telescopic part 401b-13 cannot be separated from the first cavity 401 b-11. The first chamber 401b-11 also has a spring 401b-15 therein, the spring 401b-15 being a compression spring that fits over the telescoping member 401b-13, with one end resting against the stop collar 401b-14 and the other end resting against the inner end face of the first chamber 401b-11 (i.e., the step face formed by the first chamber 401b-11 and the second chamber 401 b-12).

Thus, when the operating end 401b-1 is pushed clockwise, the exposed portion of the outer end of the telescoping member 401b-13 can reach the safety module 403. Because the outer surface of the safety module 403 is convexly curved, it can slide along the convexly curved surface while the telescoping members 401b-13 retract into the first and second chambers 401b-11 and 401 b-12.

Preferably, the outer end of the telescopic member 401b-13 is also configured as a convex curved surface, and when the operation end 401b-1 is pushed clockwise, the convex curved surface of the telescopic member 401b-13 can contact with the convex curved surface of the safety module 403 to form extrusion, which is more favorable for sliding between the two. After the outer ends of the telescopic members 401b-13 slide into the hook body along the convex curved surface of the safety module 403, the telescopic members 401b-13 are exposed again after rebounding, and the safety module 403 can block the telescopic members, so that the possibility of loosening and rebounding is further prevented.

Further, the operating end 401b-1 is bent with respect to the first section D-1 in a counterclockwise direction, so that the operating end 401b-1 has a larger clockwise rotation space, and a larger obtuse angle is obtained between the first section D-1 and the driven member 401c, thereby reducing the structural instability of the driven member 401c due to the possibility of tension.

Referring to fig. 6 to 10, a second embodiment of the present invention provides a selective ventilation ring main unit, which is different from the previous embodiment: the top of the housing 100 is a top plate 104, the top plate 104 has a heat dissipation opening 104a, the top of the top plate 104 is covered with a top cover 106, one side of the top cover 106 is hinged with the edge of the top plate 104, and the other side can be opened or closed by turning over the heat dissipation opening 104 a.

The heat dissipation opening 104a is a through hole on the top plate 104, and a plurality of through holes may be arranged in an array for heat dissipation and ventilation. The top cover 106 can selectively ensure ventilation in the housing 100, and can be closed to prevent dust or foreign objects from entering when ventilation and heat dissipation are not needed. One side of the top cover 106 may be hinge-coupled to an edge of the top plate 104, and in the present invention, a plurality of hinges may be provided.

In the present invention, the turning of the top cover 106 is controlled by the top bracing assembly 500, thereby achieving the selective opening of the heat dissipation vent 104 a.

The top bracing assembly 500 comprises a rotating member 501 and a mounting and fixing plate 502, wherein the rotating member 501 is fixed at an upper position of the inner side surface of the rear side plate 103 through the mounting and fixing plate 502.

The rotary member 501 includes a tie bar 501a and a top stay 501 b. The link rod 501a has a function of a horizontal rotating shaft, an outer end thereof sequentially penetrates through the mounting fixing plate 502 and the rear side plate 103 to extend to the outside of the housing 100, and a driving portion 501c is fixed at the outer end thereof, where the driving portion 501c may be a rotating handle at an outer end of the link rod 501a, and the link rod 501a itself may be a round rod.

Furthermore, the linking rod 501a is provided with a ring body 501a-1, and the ring body 501a-1 is located at the outer side position of the mounting fixing plate 502, and can jointly clamp the mounting fixing plate 502 with the inner side surface of the top stay 501b, so as to prevent the linking rod 501a from axially sliding in and out in a telescopic manner on the mounting fixing plate 502.

The inner end of the tie bar 501a and the lower end of the top stay 501b are fixed perpendicular to each other, that is: the tie bar 501a and the top stay 501b are perpendicular to each other, and form an integrated structure. Therefore, the top stay 501b can be rotated about the link lever 501a by rotating the driving unit 501c outside the housing 100.

The top supporting rod 501b may be a straight rod, the lower end of which is fixed to the connecting rod 501a, and the upper end of which is used for jacking up the top cover 106 to open and open the heat dissipating port 104 a. Meanwhile, the top plate 104 is provided with an allowable slit 104b matched with the top stay 501b, the allowable slit 104b is a strip-shaped through slit, the upper end of the top stay 501b can pass through the allowable slit 104b without obstruction, and can be pressed against the lower surface of the top cover 106, and the top cover 106 can be pressed up or down along with the rotation of the tie rod 501 a.

In the present invention, the mounting fixing plate 502 may have a plate shape, and is fixed to the inner side surface of the rear side plate 103 by means of strips on both sides.

The mounting and fixing plate 502 has a first limit post 502a and a second limit post 502b, both of which are short post structures vertically fixed on the mounting and fixing plate 502, and can block the rotation stroke of the top stay 501b, so that the top stay 501b can only rotate within the range between the two. Specifically, the method comprises the following steps:

when the top stay 501b rotates to the first limit column 502a, the top stay 501b cannot rotate continuously due to the obstruction of the first limit column 502a, and the top cover 106 can be jacked up by the upper end of the top stay 501b at the moment, so that the top cover 106 opens the heat dissipation opening 104 a; when the top stay 501b rotates to the second limit post 502b, the top stay 501b can just put down the top cover 106 to cover the heat dissipation opening 104a because the second limit post 502b cannot rotate continuously.

Preferably, the top brace assembly 500 further comprises an adapter rod 503, one end of the adapter rod 503 is hinged to the lower end of the top brace 501b, and the other end is fixedly connected to the non-end position of the top brace 501b through an extension spring 504. Through the adaptive action of the adaptive rod 503 and the extension spring 504, the top support rod 501b can keep a stable state no matter when the top cover 106 is lifted up or the top cover 106 is put down, and the structure after the top cover 106 is supported up is prevented from lacking stability due to external interference.

Specifically, the adapter rod 503 is a straight rod which can rotate around a hinge point with the top brace 501b, and the rotation thereof also has a range limitation, which is as follows:

the mounting and fixing plate 502 further has a third limiting column 502c and a fourth limiting column 502d, which may be short columns or block structures (block structures in the drawings of the present invention) and can block the rotation of the adapter rod 503.

If it is assumed that initially, the adapter rod 503 abuts against the fourth position-limiting column 502d, and the top brace 501b abuts against the second position-limiting column 502b, and the included angle between the adapter rod 503 and the top brace 501b at this time is set to be less than 180 °, the adapter rod 503 and the top brace 501b can form a stable structure due to the stretching action of the stretching spring 504, and cannot be changed. At this time, the top end of the top stay 501b does not have a supporting function on the lower surface of the top cover 106.

When the top supporting rod 501b is rotated counterclockwise to the first position-limiting column 502a, the angle between the adapter rod 503 and the top supporting rod 501b gradually increases, and when the angle reaches 180 °, an unstable structure is formed, and the adapter rod 503 tends to rotate toward the third position-limiting column 502 c. If the top supporting rod 501b continues to rotate counterclockwise, the adapting rod 503 will be pulled by the tension spring 504 to rotate to the third limiting column 502c, the third limiting column 502c will block the adapting rod 503 from rotating continuously, and when the top supporting rod 501b finally rotates to the first limiting column 502a, the included angle between the adapting rod 503 and the top supporting rod 501b is set to be larger than 180 °, a stable structure is still formed, and it is ensured that the "supported" top cover 106 has stability.

Preferably, a matching groove 501b-1 is recessed in a side surface of the top stay 501b corresponding to the first position-limiting column 502a, the matching groove 501b-1 matches the size of the first position-limiting column 502a, and when the top stay 501b rotates to the first position-limiting column 502a, the matching groove 501b-1 can be exactly clamped on the first position-limiting column 502a, so as to enhance the binding force between the two and the stability of the whole structure.

If the heat dissipation opening 104a needs to be covered, the top support rod 501b only needs to be rotated clockwise, the included angle between the adapting rod 503 and the top support rod 501b is gradually reduced, when the included angle reaches 180 °, an unstable structure is formed, and the adapting rod 503 has a tendency of rotating towards the fourth limit column 502 d. If the top supporting rod 501b continues to rotate clockwise, the adapting rod 503 will be pulled by the tension spring 504 to rotate to the fourth position-limiting column 502d, the fourth position-limiting column 502d will block the adapting rod 503 from rotating continuously, and when the top supporting rod 501b finally rotates to the second position-limiting column 502b, and at this time, the included angle between the adapting rod 503 and the top supporting rod 501b returns to the initial state, i.e. less than 180 °, and the heat dissipating port 104a is sealed and the stable structure is maintained.

It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.

Claims

1. A selective ventilation looped netowrk cabinet which characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,

the ring main unit comprises an external shell (100) and an internal accommodating space (M) formed by the shell (100), the ring main unit is provided with at least one ring main unit, and when the number of the ring main units is more than two, the ring main units are connected with each other through a connecting component (400) to form a row, so that the selective ventilation ring main unit is formed together;

the top of the shell (100) is a top plate (104), the top plate (104) is provided with a heat dissipation opening (104a), the upper part of the top plate (104) is also covered with a top cover (106), one side of the top cover (106) is hinged with the edge of the top plate (104), and the other side of the top cover (106) can be opened or closed by turning over the heat dissipation opening (104 a);

the selective ventilation ring main unit further comprises a top bracing assembly (500);

the top bracing assembly (500) comprises a rotating piece (501) and a mounting fixing plate (502), wherein the rotating piece (501) comprises a linkage rod (501a) and a top bracing rod (501 b);

the rear part of the shell (100) is a rear side plate (103), and the rotating piece (501) is fixed at the upper position of the inner side surface of the rear side plate (103) through the mounting and fixing plate (502); the tie rod (501a) passes through the mounting fixing plate (502) and the rear side plate (103), and a driving part (501c) is fixed at the outer end of the tie rod; an inner end of the tie bar (501a) and a lower end of the top stay (501b) are fixed perpendicular to each other, and the top stay (501b) is rotatable around the tie bar (501a) by rotationally driving the driving unit (501c) outside the housing (100);

the top plate (104) is provided with an allowable slit (104b) matched with the top stay bar (501b), the upper end of the top stay bar (501b) penetrates through the allowable slit (104b), is pressed against the lower surface of the top cover (106), and can lift up or lower down the top cover (106) along with the rotation of the tie bar (501 a).

2. The selectively ventilated ring main unit as claimed in claim 1, wherein: the mounting fixing plate (502) is provided with a first limiting column (502a) and a second limiting column (502b), and can form a block for the rotation of the top supporting rod (501 b);

when the top stay bar (501b) rotates to the first limit column (502a), the top stay bar (501b) can not rotate continuously due to the obstruction of the first limit column (502a), and the top cover (106) is jacked up by the top stay bar (501b) at the moment, so that the heat dissipation opening (104a) is opened by the top cover (106);

when the top stay bar (501b) rotates to the second limit column (502b), the top stay bar (501b) can not rotate continuously due to the obstruction of the second limit column (502b), and the top cover (106) is put down by the top stay bar (501b) at the moment, so that the top cover (106) covers the heat dissipation opening (104 a).

3. The selectively ventilated ring main unit as claimed in claim 2, wherein: the top bracing assembly (500) further comprises an adapter rod (503), one end of the adapter rod (503) is hinged with the lower end of the top bracing rod (501b), and the other end of the adapter rod (503) is fixedly connected with the non-end position of the top bracing rod (501b) through an extension spring (504);

the mounting fixing plate (502) is also provided with a third limiting column (502c) and a fourth limiting column (502d) which can form a block for the rotation of the adapting rod (503);

when the top brace rod (501b) rotates to the first limit post (502a), the adapter rod (503) is pulled by the extension spring (504) to rotate to the third limit post (502c), the third limit post (502c) blocks the adapter rod (503) from rotating continuously, and the included angle between the adapter rod (503) and the top brace rod (501b) is larger than 180 degrees;

when the top brace rod (501b) rotates to the second limit post (502b), the adapter rod (503) is pulled by the extension spring (504) to rotate to the fourth limit post (502d), the fourth limit post (502d) blocks the adapter rod (503) from rotating continuously, and the included angle between the adapter rod (503) and the top brace rod (501b) is less than 180 °.

4. The selectively ventilated ring main unit as claimed in claim 2 or 3, wherein: the housing (100) comprises a first side plate (101) and a second side plate (102) which are parallel to each other and are connected to the rear side by a rear side plate (103), to the top side by a top plate (104) and to the bottom side by a bottom plate (105).

5. The selectively ventilated ring main unit as claimed in claim 2 or 3, wherein: one side of the accommodating space (M) is provided with an opening, and a covering assembly (200) is arranged at the opening.

6. The selectively ventilated ring main unit as claimed in claim 4, wherein: the connecting assembly (400) comprises pulling modules (401) and matching modules (402), wherein the pulling modules (401) are arranged at the top edges and the bottom edges of the front side and the rear side of each ring main unit, and the matching modules (402) are arranged at the edge positions of the other sides of the ring main units relative to the pulling modules (401) and form one-to-one correspondence with the pulling modules (401); one ring main unit can be connected with each matching module (402) of the other adjacent ring main unit through each pulling module (401) of the ring main unit to form a combination;

the pulling module (401) comprises a base member (401a), a driving member (401b) and a driven member (401 c); the pulling module (401) is fixed on the ring main unit through the base piece (401 a); one end of the driving part (401b) is hinged with the base part (401a) to form a first hinge point (J-1), and the other end is an operating end (401 b-1); one end of the driven part (401c) is hinged to the driving part (401b) to form a second hinge point (J-2), and the other end of the driven part is a connecting end (401 c-1);

the connecting end (401c-1) can hook a matching module (402) on the adjacent ring main unit, and when the operating end (401b-1) is pushed clockwise, two adjacent ring main units can be connected.

7. The selectively ventilated ring main unit as claimed in claim 6, wherein: the matching module (402) is of a hook-shaped structure, the driven piece (401c) is of a frame structure with a rounded rectangular outline, and the inner end of the driven piece is hinged with the non-end part of the driving piece (401 b);

the connecting end (401c-1) of the driven piece (401c) is wrapped with a circle of deformation layer (401c-2), and when the matching module (402) hooks the connecting end (401c-1), the deformation layer (401c-2) can be pressed with the matching module (402) and generate deformation.

8. The selectively ventilated ring main unit as claimed in claim 7, wherein: the pulling module (401) further comprises an elastic adapter (401 d);

the driving part (401b) is provided with a first fixing buckle (401b-2), the driven part (401c) is provided with a second fixing buckle (401c-3), and the distance between the first fixing buckle (401b-2) and the first hinge point (J-1) is larger than the distance between the second hinge point (J-2) and the first hinge point (J-1);

one end of the elastic adapter (401d) is fixed to the first fixing buckle (401b-2), and the other end is fixed to the second fixing buckle (401 c-3).

9. The selectively ventilated ring main unit as claimed in claim 8, wherein: when the operating end (401b-1) is pushed clockwise until the deformation layer (401c-2) begins to deform, the horizontal included angle between the driving part (401b) and the driven part (401c) is smaller than 180 degrees;

when the operating end (401b-1) is pushed to be in surface contact with the shell (100), the horizontal included angle between the driving piece (401b) and the driven piece (401c) is larger than 180 degrees.