CN109713595B - Internal and external circulation control device and control method for switch cabinet in transformer substation - Google Patents
Internal and external circulation control device and control method for switch cabinet in transformer substation Download PDFInfo
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- CN109713595B CN109713595B CN201811437623.XA CN201811437623A CN109713595B CN 109713595 B CN109713595 B CN 109713595B CN 201811437623 A CN201811437623 A CN 201811437623A CN 109713595 B CN109713595 B CN 109713595B
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- 238000000034 method Methods 0.000 title claims abstract description 10
- 238000001035 drying Methods 0.000 claims abstract description 15
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 66
- 239000000741 silica gel Substances 0.000 claims description 66
- 229910002027 silica gel Inorganic materials 0.000 claims description 66
- 238000010438 heat treatment Methods 0.000 claims description 37
- 238000007791 dehumidification Methods 0.000 claims description 31
- 238000005192 partition Methods 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 7
- 230000003111 delayed effect Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 9
- 238000007664 blowing Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000007605 air drying Methods 0.000 description 2
- 206010063385 Intellectualisation Diseases 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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- Drying Of Solid Materials (AREA)
- Drying Of Gases (AREA)
Abstract
The invention discloses an internal and external circulation control device of a switch cabinet in a transformer substation and a control method thereof, wherein the internal and external circulation control device comprises three air blowers, an exhaust fan, a controller, three air supply air valves and air exhaust air valves, wherein the three air blowers, the exhaust fan, the three air supply air valves and the air exhaust air valves are respectively and electrically connected with the controller, the controller is also connected with 11 temperature and humidity sensors, the 11 temperature and humidity sensors are arranged in 11 switch cabinets in a bus room, and the three air blowers are respectively connected to three groups of switch cabinets through branch pipes, wherein four switch cabinets, four switch cabinets and three switch cabinets are respectively arranged in the three groups. According to the invention, the corresponding group of blowers are started by controlling the humidity change in the switch cabinet, so that the rapid drying and blowing are realized, the dehumidifying effect is greatly improved, the automatic dehumidifying can be realized, the efficiency is higher, and the control is more convenient.
Description
Technical Field
The invention belongs to the technical field of switch cabinet dehumidifying devices, and particularly relates to an internal and external circulation control device and a control method for a switch cabinet in a transformer substation.
Background
The existing switch cabinet dehumidification system is low in intellectualization, dehumidification equipment lacks system intelligent control and management, dehumidification capacity of the dehumidification equipment is insufficient, dehumidification effect is poor, drying effect of the equipment cannot be achieved better, and service life of components is low.
Disclosure of Invention
The invention solves the technical problems that: the utility model provides a switch cabinet internal and external circulation control device in a transformer substation and a control method thereof, which are used for solving the problems in the prior art.
The technical scheme adopted by the invention is as follows: the utility model provides an inside and outside circulation controlling means of cubical switchboard in transformer substation, includes three forced draught blower, exhaust fan, controller, three air supply pneumatic valve and exhaust pneumatic valve, and three forced draught blower, exhaust fan, three air supply pneumatic valve and exhaust pneumatic valve are connected with the controller electricity respectively, and the controller still is connected with 11 temperature and humidity sensor, and 11 temperature and humidity sensor installs in 11 cubical switchboard in the bus-bar chamber, and three forced draught blower is connected to three group's cubical switchboard through the bleeder respectively, has four cubical switchboard, four cubical switchboard and three cubical switchboard in wherein three group respectively.
The controller is also connected with a heater and a temperature and humidity sensor arranged in the silica gel box.
A control method of an internal and external circulation control device of a switch cabinet in a transformer substation comprises the following steps: and acquiring the temperature and the humidity in the switch cabinet through a temperature and humidity sensor, and when the humidity in each group is larger than a set threshold xRH%, opening the air supply air valve and starting the air supply air valve to dehumidify.
A control method of an internal and external circulation control device of a switch cabinet in a transformer substation comprises the steps of closing three air supply valves, opening an air exhaust valve, and starting an exhaust fan and a heater to heat and dehumidify a silica gel box if a silica gel temperature and humidity sensor detects that the humidity in the silica gel box is higher than a set threshold yRH%.
The invention has the beneficial effects that: compared with the prior art, the invention monitors the humidity condition in the switch cabinet, pertinently starts the corresponding group of blowers according to the indoor humidity condition, so that the dry air can directly reach the switch cabinet to be dehumidified, the rapid dry air supply is realized, the dehumidification effect is greatly improved, the automatic dehumidification can be realized, the efficiency is higher, and the control is more convenient.
Drawings
FIG. 1 is a schematic diagram of a control principle structure;
FIG. 2 is a schematic structural view of a silica gel dehumidification device;
FIG. 3 is a schematic perspective view of a silica gel dehumidification device;
fig. 4 is a schematic diagram of a structure of the silica gel dehumidification device connected with the power box.
Detailed Description
The invention will be further described with reference to the accompanying drawings and specific examples.
Example 1: as shown in fig. 1-4, the internal and external circulation control device for the switch cabinets in the transformer substation comprises three air blowers, an exhaust fan, a controller, three air supply air valves and air exhaust air valves, wherein the three air blowers, the exhaust fan, the three air supply air valves and the air exhaust air valves are respectively and electrically connected with the controller, the controller is also connected with 11 temperature and humidity sensors, the 11 temperature and humidity sensors are arranged in the 11 switch cabinets in the bus chamber, and the three air blowers are respectively connected to three groups of switch cabinets through branch pipelines, wherein four switch cabinets, four switch cabinets and three switch cabinets are respectively arranged in the three groups.
The controller is also connected with a heater and a silica gel temperature and humidity sensor in the silica gel box.
Example 2: a control method of an internal and external circulation control device of a switch cabinet in a transformer substation comprises the following steps: and acquiring the temperature and the humidity in the switch cabinet through a temperature and humidity sensor, and when the humidity in each group is larger than a set threshold xRH%, opening the air supply air valve and starting the air supply air valve to dehumidify.
A control method of an internal and external circulation control device of a switch cabinet in a transformer substation comprises the steps of closing three air supply air valves, opening an air exhaust air valve, and starting an exhaust fan and a heater to heat and dehumidify a silica gel box if a silica gel temperature and humidity sensor detects that the humidity in the silica gel box is greater than a set threshold value y RH%.
As shown in fig. 2, which is a logic diagram of air circulation dehumidification control of the switch cabinet, 1# to 11# are temperature and humidity sensors installed in the switch cabinet, a A, B, C fan is a booster fan in an air supply pipe, and a D fan is a booster fan of an exhaust pipe of a silica gel box; A. b, C the blast valve is the blast air valve, and the D blast valve is the exhaust blast valve, and χRH% is the humidity setting value in the switch cabinet.
When one humidity value of 11# temperature and humidity sensors is larger than a set value, and when the silica gel box is heated, starting corresponding groups of air supply pipe air valves (A air valve, B air valve and C air valve) and simultaneously starting exhaust pipe air valves (D air valve), and starting corresponding groups of air supply fans (A fan, B fan and C fan) and exhaust fans (D fan) after time delay is 5 seconds; if one temperature and humidity sensor value in each of the three groups 1# to 4# and 5# to 8# and 9# to 11# is greater than a set value, then all three groups are started, for example: and if the humidity of the No. 1 and the humidity of the No. 6 are both greater than the set value, starting the air valve A, the air valve B and the air valve D, and starting the fan A, the fan B and the fan D after the time delay is 5S.
Example 3: as shown in fig. 2-4, a switch cabinet dehumidification device in a transformer substation comprises a silica gel box 1, wherein the silica gel box 1 is of a strip-shaped structure, a plurality of partition boards 3 with air holes 2 are arranged in the silica gel box 1 along the length direction, a rubber particle layer 4 is arranged between adjacent partition boards 3, an air inlet pipe 5 is arranged at one end of the silica gel box 1 in the length direction, an exhaust pipe 6 and a heating exhaust pipe 10 which are connected with a box body 15 to be dehumidified are arranged at the other end of the silica gel box, an electromagnetic valve I7 is arranged on the air inlet pipe 5, an exhaust fan 8 and an electromagnetic valve II 9 are arranged on the exhaust pipe 6, the heating exhaust pipe 10 is communicated with the outside, an electromagnetic valve III 11 and an heating exhaust fan 12 are arranged on the heating exhaust pipe I, a heater 13 is arranged on the partition boards 3, and a filter screen is arranged at the end part of the air inlet pipe 5.
Preferably, the end of the silica gel box 1 is uniformly provided with three exhaust pipes 6 connected with the box body to be dehumidified.
Preferably, two heaters 13 are provided for each partition plate 3.
Preferably, the above-mentioned separator 3 at the air outlet end and the second separator 3 at the air inlet end of the silica gel box 1 are respectively provided with a humidity sensor 14.
Preferably, the humidity sensor 14 is connected to a controller connected to the solenoid valve one 7, the solenoid valve two 9, the solenoid valve three 11, the heater 13, the exhaust fan 8 and the heating exhaust fan 12.
As shown in fig. 4, the invention is connected to a box body 15 to be dehumidified, three exhaust pipes are connected to three forward valves 18, the three forward valves 18 are respectively connected to an air outlet 16 at the top of the box body 15 to be dehumidified through a plurality of pipelines, a check valve 17 is arranged on an air outlet pipe at the bottom of the box body 15 to be dehumidified, which is communicated with the outside, the check valve 17 is connected to an air inlet end of a silica gel box 1 through a loop pipe, so that the cyclic heating and drying can be realized, and wet air is filtered and then enters a switch cabinet again to be heated and dried, thereby reducing the energy damage.
The device has 3 states:
1. an air circulation dehumidification state;
2. heating and drying silica gel;
3. and a standby state.
The device realizes sealing through a plurality of solenoid valves, prevents outside moisture from getting into the silica gel case.
Air circulation dehumidification state (principle schematic diagram is as shown in the figure): the three solenoid valves II and I are opened, the three exhaust fans are simultaneously opened, the solenoid valves III and the heating exhaust fans are closed, and the system is in a circulating dehumidification state. Air is forced to be dried through silica gel by a fan and then is sent into equipment to be dehumidified; in addition, the three solenoid valves II and I of the air valve are opened after receiving the control command, and then the three exhaust fans are opened after the time delay is 5S, because the solenoid valves are opened for a certain time and a time delay, if the air valve is opened while the fans are opened, the air valve is easy to be damaged, and therefore the fans are opened after the time delay. At the moment, air enters the box body to be dehumidified through the air inlet of the air filter screen, the first electromagnetic valve, the silica gel particle layer, the second electromagnetic valve, the exhaust fan and the air drying in the equipment to be dehumidified.
Silica gel heating and drying state: when any one of the four humidity sensors detects that the humidity is greater than a set value, the controller controls the three exhaust fans to be closed, and simultaneously the three electromagnetic valves II are closed; when the electromagnetic valve III is opened, the heating exhaust fan is started after time delay is 5S, and eight groups of heaters (adopting electric heating pipes) are simultaneously started, and at the moment, the heating exhaust fan enters a silica gel heating and drying state. At the moment, the outside air of the silica gel box is heated by the first electromagnetic valve, the silica gel (heating state), the exhaust pipe, the third electromagnetic valve, the heating exhaust fan and discharged outside the silica gel box, namely, the silica gel box is heated and forced to circulate by the fan, so that the water vapor scattered after the silica gel is heated is taken away, and the silica gel is heated and dried.
Standby state: when the device to be dehumidified does not need dehumidification and the humidity of the silica gel box does not reach the set value, the device is not in a circulating dehumidification state, is not in a heating drying state, and is in a standby state when the three exhaust fans and the heating exhaust fan are all closed.
The device is used for dehumidifying box equipment and circulating air in the internal environment, and can efficiently solve the problems of common circulating air and humidity.
Switch cabinet dehydrating unit's advantage in the transformer substation:
1) The silica gel dehumidification device is arranged on the power box body, the power box body is provided with an exhaust port, under the action of an exhaust fan, dry gas is discharged to the power box body, humid air in the power box body is taken away and discharged, dehumidification of the power box body is realized, dehumidification in the power box body is realized through external introduction of the dry air, ageing of components in equipment is avoided, the service life is prolonged, dehumidification uniformity is better, dehumidification effect is better, a heater, a heating exhaust pipe and a heating exhaust fan are arranged, silica gel particles with water absorption can be heated and dried, the better water absorption effect of the silica gel particles is realized, and the dehumidification device has the characteristics of simple structure, low cost and convenience and rapidness in operation;
2) The three exhaust pipes are arranged, so that the drying gas can be quickly discharged into the power box body, the negative pressure effect is better, and the air drying effect is better;
3) Two heaters are arranged, so that heating is faster, silica gel is dried faster, and efficiency is higher;
4) The humidity sensor is arranged, so that the humidity condition in the silica gel box can be monitored in real time, the silica gel dehumidification effect is monitored, and the silica gel dehumidification treatment is performed in time;
5) The automatic dehumidification and drying of the device are realized through the connection of the controller with the humidity sensor, the heater, the heating exhaust fan, the exhaust fan and the electromagnetic valves, and the efficiency is higher, thereby facilitating the management and control.
The above description is only an example of the embodiment of the present invention, and the scope of the present invention is not limited thereto. Variations and alternatives can be readily ascertained by one skilled in the art within the scope of the present disclosure, which is intended to be within the scope of the present disclosure. For this purpose, the scope of the invention shall be subject to the scope of the claims.
Claims (1)
1. An internal and external circulation control device of a switch cabinet in a transformer substation is characterized in that: the device comprises three exhaust fans (8), a controller, three electromagnetic valves II (9) and electromagnetic valves I (7), wherein the controller is also connected with 11 temperature and humidity sensors, the 11 temperature and humidity sensors are arranged in 11 switch cabinets in a box body to be dehumidified, the three exhaust fans (8) are respectively connected to three groups of switch cabinets through branch pipelines, and four switch cabinets, four switch cabinets and three switch cabinets are respectively arranged in the three groups; the controller is also connected with a heater and a humidity sensor (14) arranged in the silica gel box (1), the silica gel box (1) is of a strip-shaped structure, a plurality of partition boards (3) with air holes (2) are arranged in the silica gel box (1) along the length direction, a silica gel particle layer (4) is arranged between the adjacent partition boards (3), one end of the silica gel box (1) in the length direction is provided with an air inlet pipe (5), the other end of the silica gel box is provided with an air outlet pipe (6) connected with a box body (15) to be dehumidified and a heating exhaust pipe (10), the air inlet pipe (5) is provided with a solenoid valve I (7), an exhaust fan (8) and a solenoid valve II (9) are arranged on the air outlet pipe (6), the heating exhaust pipe (10) is communicated with the outside, a solenoid valve III (11) and a heating exhaust fan (12) are arranged on the partition boards (3), and the end part of the air inlet pipe (5) is provided with a filter screen; three exhaust pipes (6) connected with the box body to be dehumidified are uniformly arranged at the end part of the silica gel box (1); two heaters (13) are arranged on each partition board (3); a humidity sensor (14) is respectively arranged on a baffle plate (3) at the air outlet end and a second baffle plate (3) at the air inlet end of the silica gel box (1); the humidity sensor (14) is connected to the controller, and the controller is connected to the first electromagnetic valve (7), the second electromagnetic valve (9), the third electromagnetic valve (11), the heater (13), the exhaust fan (8) and the heating exhaust fan (12); the silica gel box (1) is connected to a box body (15) to be dehumidified, three exhaust pipes (6) are connected to three forward valves (18), the three forward valves (18) are respectively connected to an air outlet (16) at the top of the switch cabinet through a plurality of pipelines, a check valve (17) is arranged on an air outlet pipe at the bottom of the switch cabinet, which is communicated with the outside, and the check valve (17) is connected to an air inlet end of the silica gel box (1) through a loop pipe; the control method of the internal and external circulation control device of the switch cabinet in the transformer substation comprises the following steps: the temperature and humidity in the switch cabinet are collected through a temperature and humidity sensor, when the humidity in each group is larger than a set threshold value, the second electromagnetic valve (9) and the first electromagnetic valve (7) are opened, and the exhaust fan (8) is started to dehumidify; if the humidity sensor detects that the humidity in the silica gel box is greater than a set threshold value, closing three solenoid valves II (9), opening solenoid valves I (7) and III (11), and starting a heating exhaust fan (12) and a heater to heat and dehumidify the silica gel box; the control device has 3 states: 1. an air circulation dehumidification state; 2. heating and drying silica gel; 3. a standby state;
wherein, the air circulation dehumidification state: the three solenoid valves II and the solenoid valve I are opened, the three exhaust fans are opened, the solenoid valve III and the heating exhaust fan are closed, the system is in a circulating dehumidification state, and air is forced to pass through silica gel to be dried by the fan exhaust and then is sent into the switch cabinet; the three solenoid valves II and I are opened after receiving the control command, and then after the time is delayed for 5S, the three exhaust fans are opened again, and at the moment, air passes through the air inlet of the filter screen, the solenoid valve I, the silica gel particle layer, the solenoid valve II, the exhaust fans and enters the switch cabinet to finish the drying of the air in the switch cabinet;
silica gel heating and drying state: when any one of humidity sensors arranged in the silica gel box detects that the humidity is greater than a set value, the controller controls the three exhaust fans to be closed, and simultaneously, the three electromagnetic valves II are closed; the third electromagnetic valve is opened, the heating exhaust fan is opened after time delay of 5S, and the heater is simultaneously opened, at the moment, the heating exhaust fan enters a silica gel heating and drying state, at the moment, the outside air of the silica gel box passes through the first electromagnetic valve, the silica gel particle layer, the heating exhaust pipe, the third electromagnetic valve, the heating exhaust fan and the outside of the silica gel box, namely, the heating is carried out while the forced circulation is carried out through the fan, so that the vapor scattered after the silica gel is heated is taken away, and the silica gel heating and drying is completed;
standby state: when the switch cabinet does not need dehumidification and the humidity of the silica gel box does not reach a set value, the switch cabinet is not in a circulating dehumidification state, is not in a heating drying state, and the three exhaust fans and the heating exhaust fan are all closed, so that the device to be dehumidified is in a standby state.
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| CN201811437623.XA CN109713595B (en) | 2018-11-28 | 2018-11-28 | Internal and external circulation control device and control method for switch cabinet in transformer substation |
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| CN201811437623.XA CN109713595B (en) | 2018-11-28 | 2018-11-28 | Internal and external circulation control device and control method for switch cabinet in transformer substation |
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| CN109713595A CN109713595A (en) | 2019-05-03 |
| CN109713595B true CN109713595B (en) | 2023-11-10 |
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| CN108767711A (en) * | 2018-07-26 | 2018-11-06 | 广东电网有限责任公司 | Dehumidification device |
| CN209169759U (en) * | 2018-11-28 | 2019-07-26 | 贵州电网有限责任公司 | Switchgear inner-outer circulation control device in a kind of substation |
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