CN115566560A - Power distribution cabinet capable of achieving spray cooling and control method - Google Patents

Abstract

The invention relates to the technical field of power equipment, and discloses a power distribution cabinet for spray cooling, which comprises an outer heat insulation protection frame 1, an inner heat insulation protection frame 2, a spray cooling system 3, an anti-invasion ventilation system 4, a heat pipe heat exchanger 5, a control unit 6, a cabinet inner temperature sensor 7 and a cabinet outer temperature sensor 8. The bottom of outer adiabatic bearer bar 1 and ground direct contact, be the basic frame who joins in marriage the electrical room and support, outer adiabatic bearer bar divide into upper and lower two parts, its end lower part is spray cooling system 3. The invention also provides a control method of the power distribution cabinet for cooling by spraying, which greatly increases the heat loss in the cabinet, reduces the damage of small animals, rainwater and flood to the power distribution cabinet, increases the guarantee for safety production, and has strong engineering value and popularization significance.

Description

A spray cooling power distribution cabinet and its control method

technical field

The invention relates to the technical field of electric power equipment, in particular to a power distribution cabinet and a control method for cooling by spraying.

Background technique

At present, electricity is already an indispensable part of construction sites. Countless construction equipment will not be able to operate without electricity. As the control core of the power system of construction sites - the safe operation of power distribution cabinets is very important. However, in the construction site, the natural conditions are often harsh, and the traditional power distribution cabinet has the following problems:

1) The power distribution cabinet mainly adopts a closed frame structure, and the heat dissipation is not perfect, which causes the temperature in the power distribution cabinet to be too high, resulting in potential safety hazards. In summer, when the temperature is high, the temperature in the cabinet will reach above 60 degrees. Once it exceeds the temperature of the cabinet, the components in the cabinet will withstand the temperature, and the low-voltage electrical equipment will fail. Generally, the standard for the use of distribution boxes and distribution cabinets is that the upper limit of the air temperature around the distribution box and distribution cabinet does not exceed 40 degrees.

2) The waterproof function of the power distribution cabinet is missing. Especially in the rainy season, water will enter the interior of the power distribution cabinet from the gaps in the shell, soaking the electrical components in the water, resulting in the failure of the normal operation of the power distribution cabinet, the safety of power supply on the construction site cannot be effectively guaranteed, and even serious accidents.

3) The anti-foreign object intrusion function of the power distribution cabinet is missing. Due to the imperfect design and construction of the power distribution room, the management is not strict, and there are gaps and door gaps. Small animals such as rats and snakes will enter the room through loosely closed doors, windows, cable trenches, holes, and inlet and outlet vents without wire mesh. After entering the power distribution room, they will cause short-circuit faults in high-voltage busbars, knife switches, cable terminals, transformer terminals, etc., damage the main electrical equipment, cause power outages, and cause serious losses. For the construction site, it is a headache to prevent the impact of intrusion on the safety of electricity use.

4) Due to the structural limitation of the power distribution cabinet, when the staff needs to overhaul, the staff needs to squat on the ground to adapt to the height of the power distribution cabinet to work, which brings inconvenience to the staff.

In order to solve the above problems, people have carried out a series of attempts and explorations. The patent application number 202011190477.2 is for a power distribution room with a dehumidification and ventilation system. It fully combines and utilizes natural resources to form a complete ventilation and dehumidification system, which can ensure the safe and reliable operation of the power distribution room and improve the safety of electricity consumption for users; In addition, there are daylighting windows on the roof of the power distribution room and special sun-shading leaf curtains, which can ensure daylighting and avoid direct sunlight. Application number 201120570505.3 discloses a flood control power distribution cabinet capable of preventing floods and providing power guarantee, including a power distribution cabinet and a power distribution foundation for installing the power distribution cabinet. The power distribution foundation is a platform higher than the ground surface , a waterproof cover is added outside the power distribution cabinet, the waterproof cover is a three-dimensional container with an opening at the bottom whose outline conforms to the outline of the power distribution cabinet, and the waterproof cover covers the power distribution cabinet so that it is in the In the inner cavity of the waterproof cover, the bottom of the waterproof cover has a water inlet channel, which is used as the water inlet channel of the waterproof cover when the water level exceeds the power distribution foundation during flooding, and the waterproof cover forms a closed space after the water submerges the opening of the waterproof cover . Application No. 201920557227.4 discloses an embedded-mounted mobile power distribution cabinet and electrical equipment using the power distribution cabinet so that the power distribution cabinet can be embedded in the groove, and the power distribution cabinet can be pulled out from the placement position during maintenance, which reduces the The space occupied by the installation of the power distribution cabinet is reduced, and it is convenient for inspection and maintenance, ensuring safe operation.

Although these beneficial explorations have solved some problems, for construction sites, these explorations have not quantified the control of the temperature in the distribution cabinet and the air temperature around the distribution cabinet, which is precisely the normal operation of the distribution cabinet. the key to. For this reason, the present invention proposes a spray cooling power distribution cabinet and a control method to solve the above problems.

Contents of the invention

(1) Solved technical problems

Aiming at the deficiencies of the prior art, the present invention provides a power distribution cabinet for cooling by spraying and a control method, which solves the problem of defects in the existing power distribution cabinet.

(2) Technical solution

The technical solution of the present invention to solve the above technical problems is as follows: a spray cooling power distribution cabinet and a control method, including: the outer heat insulation protection frame 1, the inner heat insulation protection frame 2, the spray cooling system 3, and the anti-intrusion ventilation system 4. Heat pipe heat exchanger 5, control unit 6, temperature sensor inside the cabinet 7, temperature sensor outside the cabinet 8;

The bottom of the outer thermal insulation protection frame 1 is in direct contact with the ground and is the basic frame support of the power distribution room. The outer thermal insulation protection frame is divided into upper and lower parts, the lower part is the spray cooling system 3, and the upper part is the inner cooling system 3. The anti-intrusion ventilation system 4 formed between the heat insulation protection frame 2, the inner heat insulation protection frame 2 and the outer heat insulation protection frame 1; the inner heat insulation protection frame 2 is connected with the outer heat insulation protection frame Phase 1 is fixed, and the inside of the inner insulation protection frame 2 is the main body of the power distribution room, including high-voltage cabinets, transformers, and low-voltage cabinets. The periphery of the inner insulation protection frame 2 is covered with heat pipe heat exchangers 5, the purpose of which is to transfer the heat generated by the power distribution cabinet to the The anti-intrusion ventilation system 4; the anti-intrusion ventilation system 4 includes an air inlet pipe section and an air inlet 41 with openings on the wall of the outer heat insulation protection frame 1 and the bottom of the inner heat insulation protection frame 2, the inner heat insulation protection frame 2 and the outer heat insulation protection frame. An air duct is formed between the frames 1, and an unpowered air cap 42 is arranged at the top center of the outer heat-insulating protection frame 1; The cavity 32 formed at the bottom of the heat insulation protection frame 1, the float valve 33 arranged on the side of the cavity 32 to replenish tap water, the water pump inlet 34 and the water pump 35 arranged on the side of the cavity 32, the water pump outlet pipeline and the sprinkler head 36;

The temperature sensor 7 inside the cabinet and the temperature sensor 8 outside the cabinet are all arranged at corresponding positions, and are connected with the controller of the water pump and the control unit 6 .

The beneficial effects of the present invention are:

1), the spray cooling power distribution cabinet and its control method, under the action of wind pressure, use the function of the unpowered wind cap to speed up the heat loss generated by the work of the power distribution cabinet, and avoid the excessive temperature in the power distribution cabinet from causing safety hazards. Hidden danger.

2) The spray cooling power distribution cabinet and the control method reduce the temperature of the air intake through the spray cooling system, which greatly improves the safety.

3) The power distribution cabinet and control method for spray cooling, and the relatively airtight space formed by the inner thermal insulation protection frame 2 can greatly reduce the safety accidents caused by the intrusion of small animals.

4) In the spray cooling power distribution cabinet and its control method, an air duct is formed between the outer thermal insulation protection frame 1, the inner thermal insulation protection frame 2, and the outer thermal insulation protection frame 1 to form an excessive buffer, so as to prevent the air outside the cabinet from directly entering the cabinet, Reduce the impact of humidity in the environment.

On the basis of the above technical solutions, the present invention can also be improved as follows.

Further, the height of the cavity 32 is 15 to 50 cm.

Further, inside the inner thermal insulation protection frame 2 is the main body of the power distribution room including high-voltage cabinets, transformers, and low-voltage cabinets, wherein the bottom of the low-voltage cabinets is provided with movable telescopic rails 23, so that the low-voltage cabinets can be easily pushed into and out of the outer thermal insulation protection frame 1, which is convenient for workers Construction and maintenance.

Further, the movable range of the movable telescopic rail 23 is from the outer frame of the outer thermal insulation protection frame 1 and the outer frame of the inner thermal insulation protection frame 2 .

Further, the number of the air inlet 41 is more than one.

Further, the air inlet pipe section is placed on the outer heat insulation protection frame 1, and is inclined downward, and the angle is controlled at 10 to 30 degrees.

Further, the sprinkler head 36 and associated pipelines are installed in the air inlet pipe section, and the position of the sprinkler head 36 is higher than the opening on the wall of the outer thermal insulation protection frame 1 and lower than the top position of the air inlet pipe section.

Further, the air inlet has an attached filter device.

Further, step 1, establishing normal ventilation conditions and spray cooling conditions;

Step 2. Set the alarm temperature of the temperature sensor inside the cabinet: x0, and the alarm temperature of the temperature sensor outside the cabinet x1;

Step 3. The control center receives the temperature x7 and x8 of the temperature sensor 7 inside the cabinet and the temperature sensor outside the cabinet in real time; when x7>x0 or x8>x1, it enters the spray cooling condition; otherwise, it enters the normal ventilation condition;

Step 4, normal ventilation condition;

Under the action of wind force, the rotation of the wind cap without power draws the air outside the power distribution cabinet through the air inlet and enters between the inner heat insulation protection frame 2 and the outer heat insulation protection frame 1 to form an air duct, flushing the heat pipe heat exchanger 5, and turning the power distribution cabinet The heat generated by the work is transferred to the air and exhausted to the atmosphere through the unpowered hood. Due to the thermal resistance formed by the air duct formed between the outer heat insulation protection frame 1 and the inner heat insulation protection frame 2 and the outer heat insulation protection frame 1, the heat load caused by solar radiation and the like is reduced. At the same time, the sealing function of the inner thermal insulation protection frame 2 greatly reduces the intrusion of small animals;

Step 5, spraying cooling condition;

Under the action of wind force, the rotation of the wind cap without power draws the air outside the power distribution cabinet through the air inlet into the air duct between the inner heat insulation protection frame 2 and the outer heat insulation protection frame 1, flushing the heat pipe heat exchanger 5, and turning the power distribution cabinet The heat generated by the work is transferred to the air and exhausted to the atmosphere through the unpowered hood. At the same time, the control unit 6 turns on the water pump 35, and the water passes through the pipeline and the sprinkler head 36, spraying and cooling the air entering the air inlet in the form of mist. An air duct is formed between the protection frame 2 and the outer heat insulation protection frame 1, water enters the cavity 32 formed by the overhead partition 22 and the bottom of the outer heat insulation protection frame 1 along the water accumulation port 31 of the overhead partition 22, and is pumped by the water pump 35 Repeat cycle. The water level in cavity 32 is controlled by a float valve.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is a flow chart of the control method of the present invention.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Example 1

One of the objectives of the present invention is to propose one of the objectives of the present invention is to provide a power distribution cabinet suitable for spraying and cooling in construction sites, so as to solve the problems raised in the above-mentioned background technology.

In order to solve the above technical problems, the present invention provides the following technical solutions: a multi-functional power distribution cabinet includes an outer heat insulation protection frame 1, an inner heat insulation protection frame 2, a spray cooling system 3, an anti-intrusion ventilation system 4, and a heat pipe heat exchanger 5. Control unit 6, temperature sensor 7 inside the cabinet, temperature sensor 8 outside the cabinet;

The bottom of the outer thermal insulation protection frame 1 is in direct contact with the ground and is the basic frame support of the power distribution room. The outer thermal insulation protection frame is divided into upper and lower parts, the lower part is the spray cooling system 3, and the upper part is the inner cooling system 3. The anti-intrusion ventilation system 4 formed between the heat insulation protection frame 2, the inner heat insulation protection frame 2 and the outer heat insulation protection frame 1; the inner heat insulation protection frame 2 is connected with the outer heat insulation protection frame Phase 1 is fixed, and the inside of the inner insulation protection frame 2 is the main body of the power distribution room, including high-voltage cabinets, transformers, and low-voltage cabinets. The periphery of the inner insulation protection frame 2 is covered with heat pipe heat exchangers 5, the purpose of which is to transfer the heat generated by the power distribution cabinet to the The anti-intrusion ventilation system 4; the anti-intrusion ventilation system 4 includes an air inlet pipe section and an air inlet 41 with openings on the wall of the outer heat insulation protection frame 1 and the bottom of the inner heat insulation protection frame 2, the inner heat insulation protection frame 2 and the outer heat insulation protection frame. An air duct is formed between the frames 1, and an unpowered air cap 42 is arranged at the top center of the outer heat-insulating protection frame 1; The cavity 32 formed at the bottom of the heat insulation protection frame 1, the float valve 33 arranged on the side of the cavity 32 to replenish tap water, the water pump inlet 34 and the water pump 35 arranged on the side of the cavity 32, the water pump outlet pipeline and the sprinkler head 36;

The temperature sensor 7 inside the cabinet and the temperature sensor 8 outside the cabinet are all arranged at corresponding positions, and are connected with the controller of the water pump and the control unit 6 .

Further, the height of the cavity 32 is 15 to 50 cm.

Further, inside the inner thermal insulation protection frame 2 is the main body of the power distribution room including high-voltage cabinets, transformers, and low-voltage cabinets. The bottom of the low-voltage cabinets is provided with movable telescopic rails 23, so that the low-voltage cabinets can be easily pushed into and out of the outer thermal insulation protection frame 1, which is convenient for workers to construct. with overhaul.

Further, the movable scope of the movable telescopic rail 23 is from the outer frame of the outer thermal insulation protection frame 1 and the outer frame of the inner thermal insulation protection frame 2 .

Further, there is more than one air inlet 41 .

Further, the air inlet pipe section is arranged on the outer heat insulation protection frame 1, and is inclined downward, and the angle is controlled at 10 to 30 degrees.

Further, the sprinkler head 36 and associated pipelines are installed in the air inlet pipe section, and the position of the sprinkler head 36 is higher than the opening on the wall of the outer thermal insulation protection frame 1 and lower than the top position of the air inlet pipe section.

Furthermore, the air inlet has an attached filter device.

Example 2

The second object of the present invention is to provide a control method for a spray cooling power distribution cabinet.

Step 1. Establish normal ventilation conditions and spray cooling conditions;

Step 2. Set the alarm temperature of the temperature sensor inside the cabinet: x0=55°C, and the alarm temperature of the temperature sensor outside the cabinet x1=37°C;

Step 3. The control center receives the temperature x7 and x8 of the temperature sensor 7 inside the cabinet and the temperature sensor outside the cabinet in real time; when x7>x0=55°C or x8>x1=37°C, it enters the spray cooling condition; otherwise, enters the normal ventilation Working condition;

Step 4, normal ventilation condition;

Under the action of wind force, the rotation of the wind cap without power draws the air outside the power distribution cabinet through the air inlet and enters between the inner heat insulation protection frame 2 and the outer heat insulation protection frame 1 to form an air duct, flushing the heat pipe heat exchanger 5, and turning the power distribution cabinet The heat generated by the work is transferred to the air and exhausted to the atmosphere through the unpowered hood. Due to the thermal resistance formed by the air duct formed between the outer heat insulation protection frame 1 and the inner heat insulation protection frame 2 and the outer heat insulation protection frame 1, the heat load caused by solar radiation and the like is reduced. At the same time, the sealing function of the inner thermal insulation protection frame 2 greatly reduces the intrusion of small animals;

Step 5, spraying cooling condition;

Under the action of wind force, the rotation of the wind cap without power draws the air outside the power distribution cabinet through the air inlet into the air duct between the inner heat insulation protection frame 2 and the outer heat insulation protection frame 1, flushing the heat pipe heat exchanger 5, and turning the power distribution cabinet The heat generated by the work is transferred to the air and exhausted to the atmosphere through the unpowered hood. At the same time, the control unit 6 turns on the water pump 35, and the water passes through the pipeline and the sprinkler head 36, spraying and cooling the air entering the air inlet in the form of mist. An air duct is formed between the protection frame 2 and the outer heat insulation protection frame 1, water enters the cavity 32 formed by the overhead partition 22 and the bottom of the outer heat insulation protection frame 1 along the water accumulation port 31 of the overhead partition 22, and is pumped by the water pump 35 The cycle is repeated, and the water level of the cavity 32 is controlled by the ball float valve.

After adopting the technical scheme, the present invention has the following advantages:

1) Under the action of wind pressure, the use of the unpowered hood accelerates the loss of heat generated by the work of the power distribution cabinet, and avoids potential safety hazards caused by excessive temperature in the power distribution cabinet.

2) At the same time, the temperature of the air intake is reduced through the spray cooling system, which greatly improves the safety.

3) The relatively airtight space formed by the inner thermal insulation protection frame 2 greatly reduces the safety accidents caused by the intrusion of small animals.

4) An air duct is formed between the outer thermal insulation protection frame 1, the inner thermal insulation protection frame 2, and the outer thermal insulation protection frame 1 to form an excessive buffer to prevent the air outside the cabinet from directly entering the cabinet and reduce the influence of environmental humidity.

The above embodiments are only for illustrating the present invention, rather than limiting the present invention. Those skilled in the relevant technical fields can make various transformations or changes without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions should also belong to the category of the present invention and should be defined by each claim.

Claims (9)

1. A spray cooling power distribution cabinet and a control method, characterized in that it comprises: the outer heat insulation protection frame 1, the inner heat insulation protection frame 2, the spray cooling system 3, the anti-intrusion ventilation system 4, and the heat exchange of heat pipes Device 5, control unit 6, temperature sensor 7 inside the cabinet, temperature sensor 8 outside the cabinet; The bottom of the outer thermal insulation protection frame 1 is in direct contact with the ground and is the basic frame support of the power distribution room. The outer thermal insulation protection frame is divided into upper and lower parts, the lower part is the spray cooling system 3, and the upper part is the inner cooling system 3. The anti-intrusion ventilation system 4 formed between the heat insulation protection frame 2, the inner heat insulation protection frame 2 and the outer heat insulation protection frame 1; the inner heat insulation protection frame 2 is connected with the outer heat insulation protection frame Phase 1 is fixed, and the inside of the inner insulation protection frame 2 is the main body of the power distribution room, including high-voltage cabinets, transformers, and low-voltage cabinets. The periphery of the inner insulation protection frame 2 is covered with heat pipe heat exchangers 5, the purpose of which is to transfer the heat generated by the power distribution cabinet to the The anti-intrusion ventilation system 4; the anti-intrusion ventilation system 4 includes an air inlet pipe section and an air inlet 41 with openings on the wall of the outer heat insulation protection frame 1 and the bottom of the inner heat insulation protection frame 2, the inner heat insulation protection frame 2 and the outer heat insulation protection frame. An air duct is formed between the frames 1, and an unpowered air cap 42 is arranged at the top center of the outer heat-insulating protection frame 1; The cavity 32 formed at the bottom of the heat insulation protection frame 1, the float valve 33 arranged on the side of the cavity 32 to replenish tap water, the water pump inlet 34 and the water pump 35 arranged on the side of the cavity 32, the water pump outlet pipeline and the sprinkler head 36; The temperature sensor 7 inside the cabinet and the temperature sensor 8 outside the cabinet are all arranged at corresponding positions, and are connected with the controller of the water pump and the control unit 6 . 2 . The power distribution cabinet with spray cooling according to claim 1 , wherein the height of the cavity 32 is 15 to 50 cm. 3 . 3. A spray cooling power distribution cabinet according to claim 1, characterized in that: the inside of the inner thermal insulation protection frame 2 is the main body of the power distribution room including high-voltage cabinets, transformers, and low-voltage cabinets, wherein the bottom of the low-voltage cabinets is set The movable telescopic rail 23 makes the low-voltage cabinet convenient to push in and out the outer heat insulation protection frame 1, which is convenient for workers to construct and overhaul. 4. A power distribution cabinet with spray cooling according to claim 1, characterized in that: the movable range of the movable telescopic rail 23 is from the outer frame of the outer thermal insulation protection frame 1 to the outer frame of the inner thermal insulation protection frame 2. 5 . The power distribution cabinet for cooling by spraying according to claim 1 , wherein the number of the air inlet 41 is more than one. 5 . 6. A spray cooling power distribution cabinet according to claim 1, characterized in that: the air inlet pipe section is placed on the outer heat insulation protection frame 1, and is at an inclined downward angle, and the angle is controlled at 10 to 30 degrees. 7. A power distribution cabinet with spray cooling according to claim 1, characterized in that: the spray head 36 and the associated pipeline are installed in the air inlet pipe section, and the position of the spray head 36 is high The position where the opening is on the wall of the outer thermal insulation protection frame 1 is lower than the top position of the air inlet pipe section. 8. A power distribution cabinet with spray cooling according to claim 1, characterized in that: the air inlet is provided with an attached filter device. 9. A control method for a spray cooling power distribution cabinet according to claim 1, characterized in that: said step 1, establishing a normal ventilation working condition and a spray cooling working condition; Step 2. Set the alarm temperature of the temperature sensor inside the cabinet: x0, and the alarm temperature of the temperature sensor outside the cabinet x1; Step 3. The control center receives the temperature x7 and x8 of the temperature sensor 7 inside the cabinet and the temperature sensor outside the cabinet in real time; when x7>x0 or x8>x1, it enters the spray cooling condition; otherwise, it enters the normal ventilation condition; Step 4, normal ventilation condition; Under the action of wind force, the rotation of the wind cap without power draws the air outside the power distribution cabinet through the air inlet and enters between the inner heat insulation protection frame 2 and the outer heat insulation protection frame 1 to form an air duct, flushing the heat pipe heat exchanger 5, and turning the power distribution cabinet The heat generated by the work is transferred to the air and exhausted to the atmosphere through the unpowered hood. Due to the thermal resistance formed by the air duct formed between the outer heat insulation protection frame 1 and the inner heat insulation protection frame 2 and the outer heat insulation protection frame 1, the heat load caused by solar radiation and the like is reduced. At the same time, the sealing function of the inner thermal insulation protection frame 2 greatly reduces the intrusion of small animals; Step 5, spraying cooling condition; Under the action of wind force, the rotation of the wind cap without power draws the air outside the power distribution cabinet through the air inlet into the air duct between the inner heat insulation protection frame 2 and the outer heat insulation protection frame 1, flushing the heat pipe heat exchanger 5, and turning the power distribution cabinet The heat generated by the work is transferred to the air and exhausted to the atmosphere through the unpowered hood. At the same time, the control unit 6 turns on the water pump 35, and the water passes through the pipeline and the sprinkler head 36, spraying and cooling the air entering the air inlet in the form of mist. An air duct is formed between the protection frame 2 and the outer heat insulation protection frame 1, water enters the cavity 32 formed by the overhead partition 22 and the bottom of the outer heat insulation protection frame 1 along the water accumulation port 31 of the overhead partition 22, and is pumped by the water pump 35 Repeat cycle. The water level in cavity 32 is controlled by a float valve.

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