WO2021102871A1

WO2021102871A1 - Maintenance-free distribution cabinet

Info

Publication number: WO2021102871A1
Application number: PCT/CN2019/121803
Authority: WO
Inventors: 侯亮
Original assignee: 扬州仁智信息科技有限公司
Priority date: 2019-11-27
Filing date: 2019-11-29
Publication date: 2021-06-03
Also published as: CN112864882A

Abstract

The present invention relates to the technical field of distribution cabinets. Disclosed is a maintenance-free distribution cabinet, comprising a cabinet body, a cabinet door, and a cabinet top. A heat-dissipating fan is disposed on the inner side of the cabinet top; first insulating blocks are symmetrically mounted on the inner walls of the cabinet body; second insulating blocks are provided on the cabinet door; wires are provided between both first insulating blocks and a terminal of the heat-dissipating fan; conductive blocks are mounted on the first insulating blocks and the second insulating blocks; and a temperature sensing device is disposed above one insulating block. In the maintenance-free distribution cabinet, when electrical components in the cabinet work for a long time, the temperature in the cabinet body is increased, mercury in a housing is heated to expand, the expanded mercury pushes a conductive rod to contact with wires on two ends to make the wires form a closed circuit so as to enable the heat-dissipating fan to start working, such that when the temperature in the distribution cabinet reaches a certain degree, the temperature sensing device can automatically contact with the wires to make the wires form a closed circuit so as to enable the heat-dissipating fan to work, and solves the problems of electricity wastage and additional heat generation due to continuous heat dissipation operation of the heat-dissipating fan.

Description

Maintenance-free power distribution cabinet

Technical field

The invention relates to the technical field of power distribution cabinets, in particular to maintenance-free power distribution cabinets.

Background technique

The power distribution cabinet is the general name of the motor control center. The power distribution cabinet is used in the occasions where the load is relatively dispersed and the circuit is less; the motor control center is used in the occasions where the load is concentrated and the circuit is more. The electric energy is distributed to the nearby load. This level of equipment should provide protection, monitoring and control of the load.

An energy-saving electrical automation power distribution cabinet (201920914162.4) is currently disclosed, including a cabinet body, a cabinet door, and a cabinet top cover. A motor is installed on the inner side wall of the cabinet top cover through a support plate, and the drive end of the motor is installed There is a cooling fan, two first insulating blocks are symmetrically installed on the inner side wall of the cabinet body close to the top, and the second insulating block corresponding to the first insulating block is installed on the inner side wall of the cabinet door. A first wire is installed between the first insulation block and the terminal of the motor, a first wire is installed between the two second insulation blocks, and the first insulation block and the second insulation block are installed corresponding to each other. The first conductive block. The power distribution cabinet of this scheme is equipped with heat dissipation and lighting functions. In addition, the heat dissipation fan can be stopped when the cabinet door is opened for maintenance operations. When the cabinet door is closed, the lighting of the lamp body can be turned off, so that the power distribution cabinet can be lowered. It has the effect of energy saving on the consumption of electric energy. However, the prior art disclosed in this disclosure has the following problems. When the power distribution cabinet is applied in real life, part of the heat generated is discharged through the air outlets on both sides of the power distribution cabinet, and secondly, the inside of the power distribution cabinet is reprocessed by adding a cooling fan. Heat dissipation, as mentioned in the existing publication, after the cabinet door is closed, the cooling fan opens and works. The purpose of the cooling fan is to dissipate heat and exhaust air inside the power distribution cabinet, but when the temperature inside the power distribution cabinet is at a normal temperature , There is no need to dissipate the heat of the power distribution cabinet, because the heating condition of the power distribution cabinet is also determined by the working status and quantity of the electrical components inside the power distribution cabinet. The heat is greater than the discharged heat, which will cause the problem of high internal temperature of the power distribution cabinet. However, when the power distribution cabinet is in normal and small-scale working conditions, there is no need for a cooling fan to dissipate the heat of the power distribution cabinet. Therefore, the existing disclosure The technology has the problem of using cooling fans under unnecessary circumstances. Not only does it waste power resources, but the work of the cooling fans also increases the heat generation of the power distribution cabinet. Therefore, only by reducing the maintenance filter and accident rate of the power distribution cabinet can the distribution cabinet be achieved. The purpose of maintenance-free electric cabinet. Therefore, in view of the above problems, it is urgent to propose a maintenance-free power distribution cabinet.

Summary of the invention

(1) Technical problems solved

Aiming at the shortcomings of the prior art, the present invention provides a maintenance-free power distribution cabinet, which has the advantages of automatically operating the cooling fan according to the temperature change in the power distribution cabinet, saving power resources, and having better heat dissipation effects, and solves the problem of heat dissipation. The fan has been in working condition when the cabinet door is closed, wasting power resources and the problem of poor heat dissipation effect.

(2) Technical solution

In order to achieve the above-mentioned purposes of automatic operation of the cooling fan, power saving and better heat dissipation effect according to the temperature change in the power distribution cabinet, the present invention provides the following technical solutions: a maintenance-free power distribution cabinet, including cabinets and cabinets The door and the cabinet top, the cabinet door is connected with the cabinet body through the hinge, the cabinet top is set on the top of the cabinet body, the inside of the cabinet top is provided with a cooling fan, the inner wall surface of the cabinet top is installed with a cooling fan motor through the support plate, and the cooling fan is connected to the top of the support plate At the output end of the cooling fan motor, two first insulating blocks are installed symmetrically on the inner side wall of the cabinet close to the top end, and second insulating blocks corresponding to the first insulating block are installed on the inner side wall of the cabinet door. Wires are installed between the insulation blocks and the terminals of the cooling fan motor, wires are installed between the two second insulation blocks, the first insulation block and the second insulation block are both installed with conductive blocks corresponding to each other, and the top of the first insulation block is arranged There is a temperature sensing device. The temperature sensing device is composed of a shell, a glass cover, a piston and a conductive rod. The shell is a hollow cylindrical shell. The outer wall of the shell is provided with threads. The top of the first insulating block is provided with a thread groove and the thread groove is opened. On the side wall of the cabinet, the thread of the shell is screwed into the thread groove on the inside of the cabinet. The glass cover is fixedly installed on the side wall of the shell and at the end away from the thread. The piston is a cylindrical rubber piston. It fits in the housing cavity and can slide in the housing. The conductive rod is a circular truncated metal conductive rod. The conductive rod is fixedly connected to the wall of the piston and located on the side away from the glass cover. The glass cover and the piston are filled with mercury, and the top of the housing Both ends of the wire are cut and inserted into the shell after being cut off and the wires at both ends are not connected together. The wall of the shell is provided with a vent hole and the vent hole is opened between the thread and the two ends of the wire. The top of the truncated cone And the bottom are respectively fixedly installed with a limited position card block.

Preferably, the first insulating block is a rectangular ceramic body.

Preferably, the second insulating block is a rectangular ceramic body.

Preferably, the air outlet hole is a circular hole.

Preferably, the limiting block is a rectangular block.

Preferably, the conductive block is a cylinder.

(3) Beneficial effects

Compared with the prior art, the present invention provides a maintenance-free power distribution cabinet, which has the following beneficial effects:

1. The maintenance-free power distribution cabinet, when the electrical components in the cabinet work for a long time, after the temperature of the cabinet rises, the mercury in the shell expands by heat, and the expanded mercury contacts the wires at both ends against the conductive rods, so that the wires are completed. The closed loop allows the cooling fan to work. When the temperature in the power distribution cabinet reaches a certain height, the temperature sensing device can automatically contact with the wire, closing the wire into a complete loop to make the cooling fan work, and solving the problem that the cooling fan keeps working and dissipating heat. Work, waste of electricity and the problem of heat generated by the work of the cooling fan greatly reduces the probability of maintenance and accidents in the power distribution cabinet, and achieves the purpose of maintenance-free power distribution cabinets.

2. In this maintenance-free power distribution cabinet, when the cooling fan reduces the temperature in the cabinet, the volume of mercury is reduced, and the atmospheric pressure presses the piston to return to its original position, so that the conductive rod is disconnected from the wire, and the cooling fan is closed, which solves the problem in the cabinet. After the temperature drops, the cooling fan still works.

Description of the drawings

Figure 1 is a cross-sectional view of the main body of the power distribution cabinet of the present invention;

Figure 2 is an enlarged view of A in Figure 1 of the present invention;

Fig. 3 is a schematic diagram of the main structure of the temperature sensing device of the present invention.

In the picture: 1 cabinet body, 2 cabinet doors, 3 cabinet tops, 4 cooling fans, 5 first insulating block, 6 second insulating block, 7 wires, 8 conductive blocks, 9 temperature sensing device, 901 housing, 902 glass cover , 903 piston, 904 conductive rod, 10 thread, 11 mercury, 12 vent hole, 13 limit block.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

Refer to Figures 1-3, the present invention provides a technical solution: a maintenance-free power distribution cabinet, including a cabinet body 1, a cabinet door 2 and a cabinet top 3. The cabinet door 2 is connected to the cabinet body 1 through a hinge, and the cabinet top 3 is provided On the top of the cabinet 1, a cooling fan 4 is arranged on the inside of the cabinet top 3, and a cooling fan motor is installed on the inner wall surface of the cabinet top 3 through a support plate. The cooling fan 3 is connected to the output end of the cooling fan motor on the top of the support plate. The top of the inner side is equipped with a cooling fan 3, which realizes that when the cooling fan 3 is working, it can dissipate the internal electrical components of the cabinet 1 and exhaust the hot air to the outside of the cabinet 1. Two symmetrical installations are installed on the inner side wall of the cabinet 1 near the top. A first insulating block 5, a second insulating block 6 corresponding to the first insulating block 5 is installed on the inner side wall of the cabinet door 2, and the two first insulating blocks 5 are both installed with wires 7 on the terminals of the cooling fan motor , A wire 7 is installed between the two second insulation blocks 6, and the first insulation block 5 and the second insulation block 6 are both installed with corresponding conductive blocks 8. When the cabinet door 2 and the cabinet body 1 are closed, the first insulation block An insulating block 5 and a second insulating block 6 can be attached to each other, so that the conductive block 8 on the first insulating block 5 and the conductive block 8 on the second insulating block 6 are in contact with each other, so that the wire 7 can pass through the conductive block 8 Laminated together to form a complete closed loop, so that the cooling fan 4 is opened to work, and the electrical components inside the cabinet 1 are dissipated. When the cabinet door 2 is clocked in, the conductive block 8 on the first insulating block 5 and The conductive block 8 on the second insulating block 6 is separated, opening the closed loop of the originally complete wire 7 and closing the cooling fan 4. The top of the first insulating block 5 is provided with a temperature sensing device 9 which is controlled by The housing 901, the glass cover 902, the piston 903 and the conductive rod 904 are composed of a hollow cylindrical housing. The outer wall of the housing 901 is provided with a thread 10, the top of the first insulating block 5 is provided with a thread groove and the thread groove is opened in On the inner wall surface of the cabinet 1, the thread 10 of the casing 901 is screwed into the thread groove inside the cabinet 1, and the glass cover 902 is fixedly installed on a side wall of the casing 901 and at the end away from the screw 10. The piston 903 is a Cylindrical rubber piston. The piston 903 is clamped in the cavity of the housing 901 and can slide in the housing 901. The conductive rod 904 is a circular truncated metal conductive rod. The conductive rod 904 is fixedly connected to the wall of the piston 903 and is located away from the glass cover 902. The glass cover 902 and the piston 903 are filled with mercury 11. The top and bottom of the housing 901 are provided with through holes. The two ends of the wire 7 are cut and inserted into the housing 901, and the wires 7 at both ends are not connected together. The wall surface of the housing 901 is provided with a vent hole 12 and the vent hole 12 is opened between the thread 10 and the two ends of the wire 7. The top and bottom of the round table 904 are respectively fixedly installed with a limiting block 13 to prevent the mercury 11 from being affected by the limiting block 13 During thermal expansion, when the piston 903 and the conductive rod 904 move on the side of the housing 901 and come into contact with the two ends of the wire 7, the conductive rod 904 can no longer recover. When the temperature in the cabinet 1 cavity is low, the mercury 11 Will not expand due to heat because piston 9 There is a closed space between 03 and the glass cover 902, so the mercury 11 is in contact with the conductor 7 at both ends against the conductive rod 904, which realizes that when the temperature in the cabinet 1 is low, the conductor 7 cannot complete the closed loop, thus making the cooling fan 4 Unable to work. When the electrical components in the cabinet 1 work for a long time, the temperature of the cabinet 1 rises, the mercury 11 in the housing 901 is heated and expands, and the glass cover 902 has a better heat transfer effect. Therefore, the glass cover 902 feels the temperature Will be immediately transferred to the mercury 11, the expanded mercury 11 is pressed against the conductive rod 904 to contact the wires 7 at both ends, so that the wires 7 complete the closed loop, so that the cooling fan 4 is opened. The air hole 12 is discharged, and at the same time, the limiting block 13 is in hard contact with the wires 7 at both ends to prevent the conductive rod 904 from passing through the wires 7. After the cooling fan 4 reduces the temperature in the cabinet 1, the volume of the mercury 11 is reduced, and the atmospheric pressure presses the piston 903 returns to the original position, so that the conductive rod 904 is disconnected from the wire 7, and the cooling fan 4 is closed.

Work steps:

Step 1: When the cabinet door 2 and the cabinet body 1 are closed, the first insulating block 5 and the second insulating block 6 can be attached to each other, so that the conductive block 8 on the first insulating block 5 and the second insulating block 6 The conductive blocks 8 on the upper part are brought into contact with each other to realize the bonding of the wires 7 through the conductive blocks 8 to form a complete closed loop, so that the cooling fan 4 is opened to work, and the electrical components inside the cabinet 1 are processed for heat dissipation.

The second step: when the cabinet door 2 is punched in, the conductive block 8 on the first insulating block 5 is separated from the conductive block 8 on the second insulating block 6, and the closed loop end of the originally complete wire 7 is opened to realize the The cooling fan 4 is closed.

Step 3: When the temperature in the cavity of the cabinet 1 is low, the mercury 11 will not expand due to heat, because there is a closed space between the piston 903 and the glass cover 902, so the mercury 11 is pressed against the conductive rod 904 to contact the wires 7 at both ends. It is realized that when the temperature in the cabinet 1 is low, the wire 7 cannot complete the closed loop, so that the cooling fan 4 cannot work.

Step 4: When the electrical components in the cabinet 1 work for a long time, the temperature of the cabinet 1 rises, the mercury 11 in the housing 901 is heated and expands, and the glass cover 902 has a better heat transfer effect, so the glass cover 902 feels the temperature Then it will be immediately transferred to the mercury 11, the expanded mercury 11 presses the conductive rod 904 to contact the wires 7 at both ends, so that the wires 7 complete the closed loop, so that the cooling fan 4 is opened, and the gas in the housing 901 is squeezed by the piston 903 to make it from The vent hole 12 is discharged, and at the same time, the limiting block 13 is in hard contact with the wires 7 at both ends to prevent the conductive rod 904 from passing through the wires 7.

Step 5: After the cooling fan 4 reduces the temperature in the cabinet 1, the volume of the mercury 11 is reduced, and the atmospheric pressure presses the piston 903 to return to the original position, so that the conductive rod 904 is disconnected from the wire 7, and the cooling fan 4 is closed.

Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, and substitutions can be made to these embodiments without departing from the principle and spirit of the present invention. And variations, the scope of the present invention is defined by the appended claims and their equivalents.

Claims

The maintenance-free power distribution cabinet includes the cabinet body (1), the cabinet door (2) and the cabinet top (3). The cabinet door (2) is connected to the cabinet body (1) through a hinge, and the cabinet top (3) is set on the cabinet body ( 1) At the top, the inside of the cabinet top (3) is provided with a cooling fan (4), two first insulating blocks (5) are symmetrically installed on the inner side wall of the cabinet body (1), and the inner side wall of the cabinet door (2) is installed with The second insulation block (6) corresponding to the first insulation block (5), the two first insulation blocks (5) are both installed with wires (7) with the terminals of the cooling fan (4), two second insulation blocks (6) A wire (7) is installed between the first insulation block (5) and the second insulation block (6) are installed with mutually corresponding conductive blocks (8), characterized in that: the first insulation block ( 5) A temperature sensing device (9) is provided on the top. The temperature sensing device (9) consists of a housing (901), a glass cover (902), a piston (903) and a conductive rod (904). The housing (901) is a Hollow cylindrical shell, the shell (901) is arranged in the wall of the cabinet (1), the glass cover (902) is fixedly installed on the right wall of the shell (901), and the piston (903) is arranged in the cavity of the shell (901) , The conductive rod (904) is fixedly connected to the left side wall of the piston (903), the glass cover (902) and the piston (903) are filled with mercury (11), and the wire (7) is arranged in the left cavity of the can (901).
The maintenance-free power distribution cabinet according to claim 1, characterized in that: the outer wall of the housing (901) is provided with threads (10), the top of the first insulating block (5) is provided with thread grooves and the thread grooves are opened in the cabinet. On the inner side wall surface of the body (1), the threads (10) of the housing (901) are threadedly connected in the thread grooves on the inner side of the cabinet body (1).
The maintenance-free power distribution cabinet according to claim 1, characterized in that: the piston (903) is a cylindrical rubber piston, and the piston (903) is clamped in the cavity of the housing (901) and can be in the housing ( 901) slide within.
The maintenance-free power distribution cabinet according to claim 1, characterized in that: the top and bottom of the casing (901) are provided with through holes, and the two ends of the wire (7) are cut off and inserted into the casing (901). And the wires (7) at both ends are not connected.
The maintenance-free power distribution cabinet according to claim 1, characterized in that: the conductive rod (904) is a circular truncated metal conductive rod, and the top and bottom of the conductive rod (904) are respectively fixedly installed with limiter blocks (13) .
The maintenance-free power distribution cabinet according to claim 1, characterized in that: the wall surface of the housing (901) is provided with an air outlet (12) and the air outlet (12) is opened on the thread (10) and the wire (7) Between the two ends.