CN102886191A - Method for drying air entering oil expansion tank of electric equipment and air drying equipment thereof - Google Patents
Method for drying air entering oil expansion tank of electric equipment and air drying equipment thereof Download PDFInfo
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- CN102886191A CN102886191A CN2011102112578A CN201110211257A CN102886191A CN 102886191 A CN102886191 A CN 102886191A CN 2011102112578 A CN2011102112578 A CN 2011102112578A CN 201110211257 A CN201110211257 A CN 201110211257A CN 102886191 A CN102886191 A CN 102886191A
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Abstract
The invention relates to an air drying method and a drying device thereof, in particular to a method for drying air entering an oil expansion tank of electric equipment and a drying device thereof. The drying method comprises the following steps of: adding a renewable drying agent for drying air sucked into the oil expansion tank; judging whether the renewable drying agent reaches a saturated state; activating a drying hot air current device when the renewable drying agent reaches the saturated state; and making flowing dry hot air current produced by the drying hot air current device flow through the surface of the drying agent for absorbing moisture of the drying agent in the saturated state, and discharging to the outside. The drying device for implementing the method comprises a lower connecting piece, wherein an inflow air drying tower, a one-way valve and a blowing device are arranged in the lower connecting piece; a heating device is arranged additionally; and when the humidity is more than or equal to a preset extreme humidity value according to detection of a humidity sensor, activating and starting the heating device, the inflow air drying tower, the blowing device and the one-way valve.
Description
Technical field
The present invention relates to a kind of air drying means and drying device thereof, specifically a kind of for carrying out dry method and drying device thereof to entering Oil-filled Electrical Equipments expansion tank air.
Background technology
In a lot of electrical equipments, such as being typically provided with an oily expansion tank in filling transformer, choke coil or the shunting switch, be used for compensating the change in volume of the insulating oil that causes owing to variations in temperature.In order to make the airborne humidity that sucks oily expansion tank be lower than certain setting value, an air dry-set is set the air that sucks is carried out drying.The drying means of prior art and drying device thereof generally are by reproducible drier is set the air that sucks in the oily expansion tank case to be carried out drying, after the drier moisture absorption is saturated, by electric heater unit (being generally the impedance heating) the saturated drier of moisture absorption is regenerated in order to reuse again.When drier is regenerated, in order to prevent that adding thermogenetic humid air enters oily expansion tank, generally under the pathway closure state, carry out, but the expansion of oily expansion tank or contraction can't discharge in this period, treat the dry complete closing passage moment outside air of opening of desiccant regeneration is produced one and refluxes fast or internal gas is gone out, do not reach dry effect and poor stability; Thereafter improved technology is to have removed magnetic valve on the basis of above-mentioned technology, namely when drier being regenerated heating, passage is not sealed, but a testing element (pressure sensor) being set in addition to flowing out in the oily expansion tank or the monitoring state identification of air amount, air flows out from oily expansion tank or just starts when not having air-flow the regeneration of drier is heated.During the drier thermal regeneration, only depend on the condensing flow of when heating water vapour drier of sening as an envoy to finish regeneration, this process length consuming time, drying efficiency is not high.Simultaneously at present inevitably also there is following defective in technology: a kind of situation is to flow out from oily expansion tank or do not have air-flow, drier to be in the thermal regeneration process when air, suppose again that air transfers to by the external world and enter oily expansion tank this moment, this moment, the thermal regeneration process should namely stop, still be present in a large number in the drier and dry by the fire the humid air that because of heating this moment, thereby cause humid air to be inhaled in the oily expansion tank.Also have a kind of situation to be: to suppose that air enters oily expansion tank by the external world, and the humidity value that this moment, humidity sensor recorded is greater than predefined limiting value, then humid air still can constantly be inhaled into oily expansion tank, until air transfers to by oily expansion tank outflow or do not have stream condition.Both of these case is unavoidable, also is the critical defect of present this technology.The precision of this pressure sensor for turnover expanded air flow regime is judged is very high in addition, so its price is very expensive.
Summary of the invention
The present invention for the defective that solves existing air drying means and drying device thereof provide a kind of more reliable, drying efficiency is higher and the air that need not carry out to whether existing air drying means that the air-flow how to flow to judges and device thereof to be used for dry method to entering Oil-filled Electrical Equipments expansion tank air carries out drying.
The present invention proposes a kind of for carrying out dry method to entering Oil-filled Electrical Equipments expansion tank air, the drier that renewable recovery is set carries out drying to the air that is drawn in the oily expansion tank, it is characterized in that: whether the state of reaching capacity is judged to the drier of described renewable recovery, when the drier of renewable recovery reaches capacity state, activate a dry heat airflow apparatus, described dry heat airflow apparatus produce the dry heat air flow stream that flows cross described drier Surface absorption saturation state drier moisture and discharge.Whether the state of reaching capacity is judged can take following mode to the drier of described renewable recovery, a kind of is that drier ambient air humidity to renewable recovery detects, and humidity value and a predefined humidity limiting value that detects compared, when detected humidity value activates a dry heat airflow apparatus during more than or equal to predefined humidity limiting value, predefined humidity limiting value is to determine like this, when drier after moisture absorption work after a while, it can be in a kind of saturated state that is about to, its airborne moisture just was in the situation that the agent that can not be dried absorbs when this moment, humid air was through the drier under this state, air humidity value under this situation can be set as the humidity limiting value, certainly for guarantee safety for the purpose of, this humidity limiting value can suitably be turned down; Another mode is, drier to renewable recovery carries out weight measurement, when institute's check weighing amount activates a dry heat airflow apparatus during more than or equal to predefined weight limiting value, causing own wt because drier understands the moisture in the absorbing air when the air that enters oily expansion tank is carried out drying increases, the moisture that its absorption contains when drier is in saturation state is maximum, the gross weight of drier under this state is set as the weight limiting value, certainly for guarantee safety for the purpose of, this weight limiting value can suitably be turned down; Certainly also having another mode is exactly that the conductance of drier is measured, when the survey conductance activates a dry heat airflow apparatus during more than or equal to predefined conductive electrode limit value, causing electric conductivity because drier understands the moisture in the absorbing air when the air that enters oily expansion tank is carried out drying increases, the moisture that its absorption contains when drier is in saturation state is maximum, the conductance of this moment is also maximum, the conductance of drier under this state is set as the conductive electrode limit value, certainly for guarantee safety for the purpose of, this conductive electrode limit value can suitably be turned down.Described dry heat airflow apparatus is comprised of one group of parts, usually comprise air intake drier, blowing device, heater, certainly can consider to arrange better guiding device, under the situation that does not activate the dry heat airflow apparatus, suitable position can check valve be set so that air inlet enters oily expansion tank along predetermined passage, guarantees that the air that enters obtains the drying of drier conscientiously.
For realizing above-mentioned drying means, the present invention also proposes following air dry-set, it comprises a loam cake, lower cover and one are positioned at, between the lower cover with upper, lower cover be tightly connected or with one of them the first shell that becomes one, wherein, in described the first shell, but be provided with a cylinder that is filled with the solid drier of allowing air flow, upper surface and the loam cake of cylinder are tightly connected, the inner and outer wall of cylinder has the hole that can allow air pass through, solid drier is arranged in the interlayer between the cylinder inside and outside wall, it is the renewable medium that returns to sucting wet state that porosity and looseness shape or graininess can allow air flow through, described loam cake has attaching parts on, described upper attaching parts have and have the position that is connected with oily expansion tank and be provided with the upper channel that leads to oily expansion tank, this upper channel communicates with the inner core passage of cylinder, in the inner core passage of upper channel or cylinder, be provided with a humidity sensor that can detect drier surrounding air humidity, the described lower hole that at least one communicates with the sandwich passage of cylinder outer wall and the formation of the first shell that is covered with, it is characterized in that: also comprise connector, one end of described lower connector and the lower surface of described cylinder are tightly connected, there is passage to communicate with the inner core passage of cylinder in this time connector, passage in the lower connector is provided with air cleaner, check valve, air intake drier and blowing device, heater is contained in the inner core passage, when humidity sensor detects one during greater than predefined air humidity value, start the air intake drier, heater and to the blowing device of the inner core passage air inducing of cylinder, check valve is also opened simultaneously.Now the groundwork flow process of apparatus of the present invention is described below: generally speaking, check valve in the lower connector passage is in closed condition, this moment, outside air can't be directly along lower connector passage, the inner core passage of cylinder, upper channel passes in and out oily expansion tank, only has the hole that communicates by the sandwich passage with cylinder outer wall and the first shell form that covers down setting, the sandwich passage that cylinder outer wall and the first shell form, inside and outside wall by cylinder flow through the inner core passage that drier enters cylinder, pass in and out oily expansion tank by upper channel again, this moment, drier was in undersaturated condition, can carry out drying to the humid air that enters oily expansion tank, after a period of time, its water content can increase, the air humidity that enters oily expansion tank also can be along with increase, the humidity sensor that is arranged on the inner core passage of upper channel or cylinder can detect a humidity value and compare with predefined limit humidity value, when the humidity value that detects during more than or equal to the limit humidity value of certain setting, can activate the heater that is arranged on the inner core passage, the air intake drier, then activate the blowing device of opening in the lower connector passage, this moment, check valve was opened automatically, outside air is blown into the inner core passage of cylinder and is added the thermosetting dry-heat air through heater by blowing device after air intake drier drying, can there be the outlet of both direction in this dry-heat air in the moment that enters, one is to enter upper channel along the inner core passage of cylinder always, but this strand hot-air can form an actual pressure balance point in the somewhere of upper channel after entering upper channel, enter behind the segment distance one of the self-assembling formation balance interface of being obstructed, this moment this burst heated drying air only have hole from the cylinder inner wall to enter the drier of the plan saturation state between the inside and outside wall and flow through saturation state drier the surface from the cylinder outer wall hole out, then flow through the sandwich passage that cylinder outer wall and the first shell form, cover the hole that the sandwich passage with cylinder outer wall and the first shell form that is provided with communicates and be discharged to the external world through lower, like this after circulation after a while, the desiccant regeneration of saturation state is to previous drying regime, descend subsequently the blowing device in the connector passage, check valve, and heater, the air intake drier cuts out, and air dry-set is worked under normal conditions.
Therefore for realizing purpose of the present invention, apparatus of the present invention are specially:
A kind of for filling transformer, the air dry-set of choke coil and shunting switch, it comprises a loam cake, lower cover and one are held on, the first shell between the lower cover, in the first shell, be provided with a cylinder, the upper surface of cylinder is fixedly connected with loam cake, its lower surface sealed by capping or directly and lower cover be tightly connected, but the solid drier of allowing air flow is housed between the annular gap of the inside and outside wall of cylinder, the center of cylinder is the inner core passage, the inner and outer wall of cylinder has the passage that can allow air pass through, loam cake has the upper attaching parts that can be connected with oily expansion tank, upper attaching parts are provided with the upper channel that leads to oily expansion tank, this upper channel communicates with the inner core passage of cylinder, also be provided with the humidity sensor that to measure solid drier surrounding air humidity, the port that lower cover has at least a sandwich passage that forms with cylinder outer wall and the first shell to communicate, also comprise connector, be provided with check valve in the lower connector, the air intake drier, blowing device, lower channel in the lower connector communicates with the inner core passage, be provided with heater in the inner core passage, when humidity sensor detects one during more than or equal to predefined limit humidity value, activate and also open heater, the air intake drier, blowing device and check valve.
Further, the sandwiched junction of described the first shell and loam cake and lower cover arranges sealing gasket or adds fluid sealant;
Further, described the first shell is weak thermally conductive materials;
Further, described the first shell is transparent glass material or transparent resin material;
Further, described drier is graininess or is loose porous bulk or sheet;
Further, the connected mode of described upper attaching parts and oily expansion tank is flange form or screw-type;
The humidity sensor that further, can detect drier surrounding air humidity be arranged on upper channel close inner core channel outlet the position or be arranged on the position of the outlet of inner core passage;
Further, described lower cover adopts strong thermally conductive materials;
Further, described check valve is a kind of pressure reduction check valve or electronic check valve;
Further, be provided with the guiding device that the humid air air-flow that has absorbed the moisture of drier under the saturation state and formed is outwards derived in the sandwich passage that described cylinder outer wall and the first shell form;
Further, described guiding device is that downward-sloping flow deflector is or/and the fan that outwards blows out;
Further, when humidity sensor detects one during more than or equal to predefined limit humidity value, activate and order is opened air intake drier, heater, blowing device and check valve;
Further, the port of described port arranges air cleaner;
Further, being shaped as of described port can allow suitable " V " shape of discharging of condensate water.
Further, lower connector import department arranges air cleaner;
The drier that the present invention relies on the hot blast of flowable drying that needs are regenerated carries out heating, drying, greatly improved operating efficiency, removed simultaneously relying on pressure sensor to judge observation process and the device of " expiration " or " air-breathing " state of oily expansion tank in the prior art from, avoided simultaneously having in some cases the problem that the humid air of the value of overstepping the extreme limit enters oily expansion tank.
Description of drawings:
The schematic flow diagram of Fig. 1---the inventive method
The schematic flow diagram of Fig. 1-1-the inventive method embodiment 1
The schematic flow diagram of Fig. 1-2-the inventive method embodiment 2
The schematic flow diagram of Fig. 1-3--the inventive method embodiment 3
Fig. 2------apparatus of the present invention structure chart
(air-breathing) workflow schematic diagram under Fig. 3-1-----apparatus of the present invention normality
(expiration) workflow schematic diagram under Fig. 3-2------apparatus of the present invention normality
Workflow schematic diagram under Fig. 4------apparatus of the present invention desiccant regeneration state
The specific embodiment:
At first the exemplary flow Fig. 1 according to the inventive method describes drying means of the present invention, the present invention proposes a kind of for carrying out dry method to entering Oil-filled Electrical Equipments expansion tank air, the drier that renewable recovery is set carries out drying to the air that is drawn in the oily expansion tank, it is characterized in that: whether the state of reaching capacity is judged to the drier of described renewable recovery, when the drier of renewable recovery reaches capacity state, activate a dry heat airflow apparatus, described dry heat airflow apparatus produce the dry heat air flow stream that flows cross described drier Surface absorption saturation state drier moisture and discharge.Whether the state of reaching capacity is judged can take following mode to the drier of described renewable recovery, as Figure 1-1, a kind of is that drier ambient air humidity to renewable recovery detects, and humidity value and a predefined humidity limiting value that detects compared, when detected humidity value activates a dry heat airflow apparatus during more than or equal to predefined humidity limiting value, predefined humidity limiting value is to determine like this, when drier after moisture absorption work after a while, it can be in a kind of saturated state that is about to, its airborne moisture just was in the situation that the agent that can not be dried absorbs when this moment, humid air was through the drier under this state, air humidity value under this situation can be set as the humidity limiting value, certainly for guarantee safety for the purpose of, this humidity limiting value can suitably be turned down, the drier ambient air humidity of renewable recovery is detected a humidity sensor can be set detect online; Another mode is, shown in Fig. 1-2, drier to renewable recovery carries out weight measurement, when institute's check weighing amount activates a dry heat airflow apparatus during more than or equal to predefined weight limiting value, causing own wt because drier understands the moisture in the absorbing air when the air that enters oily expansion tank is carried out drying increases, the moisture that its absorption contains when drier is in saturation state is maximum, the gross weight of drier under this state is set as the weight limiting value, certainly for guarantee safety for the purpose of, this weight limiting value can suitably be turned down, the drier of renewable recovery is carried out weight measurement can adopt miniature electronic weighing instrument to carry out on-line measurement; Certainly also having another mode is exactly that the conductance of drier is measured, as Figure 1-3, when the survey conductance activates a dry heat airflow apparatus during more than or equal to predefined conductive electrode limit value, causing electric conductivity because drier understands the moisture in the absorbing air when the air that enters oily expansion tank is carried out drying increases, the moisture that its absorption contains when drier is in saturation state is maximum, the conductance of this moment is also maximum, the conductance of drier under this state is set as the conductive electrode limit value, certainly for guarantee safety for the purpose of, this conductive electrode limit value can suitably be turned down, the conductance of drier is measured can be taked miniature conductivity measurement instrument to carry out online detection.Described dry heat airflow apparatus is comprised of one group of parts, usually comprise air intake drier, blowing device, heater, certainly can consider to arrange better guiding device, under the situation that does not activate the dry heat airflow apparatus, suitable position can check valve be set so that air inlet enters oily expansion tank along predetermined passage, guarantees that the air that enters obtains the drying of drier conscientiously.
Specifically illustrate again the concrete structure of apparatus of the present invention according to Fig. 2, it comprises a loam cake 1, lower cover 2 and one are held on, the first shell 3 between the lower cover, being preferably in the first shell 3 arranges sealing gasket 24 or adds fluid sealant with the sandwiched junction of loam cake 1 with lower cover 2, loam cake 1 passes through connecting rod 20 with lower cover 2, nut 21 connections grip and form one with the first shell, certain the first shell 3 can be processed into one with one of loam cake 1 and lower cover 2, thermally conductive materials a little less than the first shell 3 general selections, can be transparent glass material, certainly transparent resin material preferably, control cabinet 19 is fastened on by bolt 22 and covers, in the first shell 3, be provided with a cylinder 5 that is filled with solid drier 4, drier 4 is loose porous shape can allow air pass through, it can be granular, it also can be sheet, or other shape can absorbing air in the material of moisture, such as silica gel, molecular sieve, fiber desiccant, mineral agent etc.Drier 4 can be tending towards saturated gradually through after a certain amount of moisture absorption, and namely wettability power reduces or loses wettability power, and carry out heat drying to drier 4 this moment, can make it recover the regeneration wettability power.Cylinder 5 is generally taked thin plate with holes or net, the upper surface of cylinder 5 is withstood loam cake 1 and is connected and fixed by spiral or screw 25, the place of being connected and fixed of itself and loam cake 1 can arrange sealing gasket 26, capping 23 is fastened on by bolt or screw 27 and seals on cylinder 5 lower surfaces and with the lower surface or cylinder 5 lower surfaces directly are connected with lower cover and seal, the inwall 6 of cylinder 5 and outer wall 7 have the hole 8 that can allow air pass through, solid drier 4 is arranged in the interlayer between cylinder 5 inside and outside walls, it is the renewable medium that returns to sucting wet state that porosity and looseness shape shape or graininess can allow air flow through, described loam cake 1 has attaching parts 9 on, described upper attaching parts 9 have and have the position that is connected with oily expansion tank, this coupling part can realize that the mode that is connected with oily expansion tank is generally flange and connects, but certainly also screw-type connection etc., upper attaching parts 9 are provided with the upper channel 10 that leads to oily expansion tank, this upper channel 10 communicates with the inner core passage 11 of cylinder, be provided with in addition the humidity sensor 12 that can detect drier 4 surrounding air humidity, it is best that humidity sensor 12 is arranged on the position effect of the close inner core passages of attaching parts 9 11 outlets, certainly also can be arranged on the exit position of inner core passage 11.The port 13 that described lower cover 2 has at least a mezzanine space that forms with cylinder outer wall and the first shell to communicate, lower cover 2 adopts such as the strong thermally conductive materials such as aluminium or copper, certainly the port of port 13 preferably arranges air cleaner 29, and the shape preferred design of port 13 becomes can allow simultaneously suitable " V " shape of discharging of condensate water.Also comprise connector 14, lower connector 14 is sealedly connected and fixed by the internal and external threads interconnection system with capping 23, also lower connector 14 can be fixedly connected on the lower cover 2 by bolt or screw 26 and be tightly connected with capping 23 again, be provided with check valve 16 in the lower connector 14, air intake drier 32, blowing device 18, certainly its import department preferably arranges air cleaner 28, heater 17 is contained in the inner core passage 11, there is access opening 15 to communicate with the inner core passage in the lower connector 14, blowing device 18 produces negative pressure and check valve 16 can be opened automatically to heater 17 blowing the time, certainly check valve 16 also can be the motor-driven valve that active control is opened, blowing device 18 will flow through the thermal current that heater 17 further is heated to form drying through air intake drier 32 dried air intakes in inner core passage 11, the dry heat air-flow that is heated to form passes hole 8 on cylinder 5 inwalls and flows through the porosity and looseness shape drier 4 that arranges between cylinder 5 inside and outside wall interlayers again and flow out by the hole 8 on cylinder 5 outer walls, the port 13 of lower cover flow through downwards discharged to atmosphere through the sandwich passage of formation between cylinder 5 outer walls and the first shell 3 again, when the dry air of heat flows through the drier of intending saturation state, understand the desiccant dryness that absorbs the moisture in the drier of intending saturation states in a large number and will intend fast saturation state, certainly the dry gas stream of heat becomes the larger air of humidity ratio because having absorbed the moisture content in the drier, for so that the larger air of these humidity ratios discharge as early as possible, can consider to arrange let-off gear(stand), in the sandwich passage that for example between cylinder outer wall and the first shell 3, forms downward-sloping flow deflector 30 is set, fan 31 devices such as grade that outwards blow out perhaps are set.
Simply set forth (air-breathing) workflow under the normality of the present invention according to Fig. 3-1: under general normality, solid drier 4 is in the unsaturation state, this moment, but it was in the state of the humidity in the absorbing air, therefore be arranged on upper channel 10 or inner core passage 11 the humidity value of the air that detects of humidity sensor 12 less than predetermined numerical value, it can not start blowing device 18, other can not start such as air intake drier 32, heater 17 yet, and check valve 16 is in self-closing state under the effect of Microspring power natch.When if the oil in the oily expansion tank of the upper attaching parts 9 of connection this moment shrinks, namely be " air-breathing " of our normal title, this moment, extraneous air only had at least one port 13 that communicates with mezzanine space that cylinder outer wall and the first shell form through arranging on the lower cover 2 to enter the mezzanine space of cylinder 5 outer walls and the formation of the first shell, then pass the hole 8 on cylinder 5 outer walls, flow through the surface of solid drier 4 after super-dry, pass again the inner core passage 11 that hole on the cylinder inner wall enters cylinder, inner core passage 11 risings by cylinder flow into the upper channel that leads to oily expansion tank 10 that is provided with in the upper attaching parts 9 again, the air that flows this moment guarantees that through the detection of humidity sensor 12 humidity value is lower than the limiting value of setting, enter at last oily expansion tank, the drying of the air that enters when guaranteeing " air-breathing " state.Simply set forth (expiration) workflow under the normality of the present invention according to Fig. 3-2, under normal conditions, when if the oil in the connection in the oily expansion tank of attaching parts 9 expands, namely be our normal " expirations " that claims, mezzanine space → port 13 that hole on the cylinder outer wall of hole on the cylinder inner wall of the inner core passage 11 of the air of breathing out this moment order by upper channel 10 → cylinder → pass → flow through solid drier 4 → pass → enter cylinder outer wall and the first shell form → at last discharge.
Set forth the schematic diagram of working under the drying prescription reproduced state of the present invention according to Fig. 4: when in a single day its humidity value of detection of the air process humidity sensor 12 that flows through meets or exceeds predetermined numerical value, proof solid drier 4 is in saturation state need to carry out drier is carried out drying regeneration, can activate the heater 17 of the inner core passage 11 that is arranged on cylinder this moment, then activate the air intake drier 32 of opening in the lower connector passage, blowing device 18, check valve 16 is opened under the effect of negative pressure automatically subsequently, blowing device 18 will at first be blown into the inner core passage 11 of cylinder and form dry-heat air through heater 17 through air intake drier 32 dried air by the outside air that check valve enters, can there be the outlet of both direction in this dry-heat air in the moment that enters, one is to enter upper channel 10 along the inner core passage of cylinder always, but this strand hot-air forms an actual pressure balance point in the somewhere of upper channel 10 after entering upper channel 10, can only enter a segment distance and form the balance interface of being obstructed, this moment this burst heated drying air air-flow only have hole 8 from cylinder 5 inwalls to enter the drier 4 of the saturation state between the inside and outside wall and the surface of flowing through the drier 4 of intending saturation state from cylinder 5 outer cinclides out, then flow through the mezzanine space that cylinder outer wall and the first shell form, the port 13 that communicates through the lower mezzanine space that forms with cylinder outer wall and the first shell that be covered with is discharged to the external world, like this after circulation after a while, drier 4 regeneration of saturation state are after previous drying regime, descend subsequently the check valve 16 in connector 14 passages, blowing device 18, air intake drier 32 and heater 17 are closed successively, and air dry-set is worked under normal conditions.Because flowing through the hot-air on surface of the drier 4 of saturation state has brought out the moisture in the drier and has formed humid air, in order better humid air to be discharged rapidly, the present invention arranges downward-sloping flow deflector 30 in the sandwich passage that forms between cylinder outer wall and the first shell 3, fan 31 guiding devices such as grade that outwards blow out perhaps are set.
It should be noted that at last: above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although with reference to preferred embodiment the present invention is had been described in detail, will be understood by those skilled in the art that, can make amendment or be equal to replacement technical scheme of the present invention, and not break away from the spirit and scope of technical solution of the present invention.
Claims (18)
1. one kind is used for carrying out dry method to entering Oil-filled Electrical Equipments expansion tank air, the drier that renewable recovery is set carries out drying to the air that is drawn in the oily expansion tank, it is characterized in that: whether the state of reaching capacity is judged to the drier of described renewable recovery, when the drier of renewable recovery reaches capacity state, activate a dry heat airflow apparatus, described dry heat airflow apparatus produce the dry heat air flow stream that flows cross described drier Surface absorption saturation state drier moisture and discharge.
2. according to claim 1 for carrying out dry method to entering Oil-filled Electrical Equipments expansion tank air, it is characterized in that: whether the state of reaching capacity is judged by the drier ambient air humidity to renewable recovery detects to the drier of described renewable recovery, and the humidity value that detects and a predefined humidity limiting value are compared to carry out, when detected humidity value activates a dry heat airflow apparatus during more than or equal to predefined humidity limiting value, described dry heat airflow apparatus produce the dry heat air flow stream that flows cross described drier Surface absorption saturation state drier moisture and discharge.
3. according to claim 1 a kind of for carrying out dry method to entering Oil-filled Electrical Equipments expansion tank air, it is characterized in that: to the drier of described renewable recovery whether the state of reaching capacity judge by the weight to the drier of renewable recovery and detect, and the gravimetric value that detects and a predefined weight limiting value are compared to carry out, when detected gravimetric value activates a dry heat airflow apparatus during more than or equal to predefined weight limiting value, described dry heat airflow apparatus produce the dry heat air flow stream that flows cross described drier Surface absorption saturation state drier moisture and discharge.
4. according to claim 1 a kind of for carrying out dry method to entering Oil-filled Electrical Equipments expansion tank air, it is characterized in that: to the drier of described renewable recovery whether the state of reaching capacity judge by the conductance to the drier of renewable recovery and detect, and the conductance numerical value that detects and a predefined conductive electrode limit value are compared to carry out, when detected conductance numerical value activates a dry heat airflow apparatus during more than or equal to predefined conductive electrode limit value, described dry heat airflow apparatus produce the dry heat air flow stream that flows cross described drier Surface absorption saturation state drier moisture and discharge.
5. one kind is used for carrying out dry air dry-set to entering Oil-filled Electrical Equipments expansion tank air, it comprises a loam cake (1), a lower cover (2) and one are held on, the first shell (3) between the lower cover, in the first shell (3), be provided with a cylinder (5), cylinder (5) but the solid drier (4) of allowing air flow is housed, the center of cylinder (5) is inner core passage (11), the inwall of cylinder (6) and outer wall (7) but on be provided with the hole (8) that allowing air flow passes through, loam cake (1) has the upper attaching parts (9) that can be connected with oily expansion tank, upper attaching parts (9) are provided with the upper channel (10) that leads to oily expansion tank, this upper channel (10) communicates with the inner core passage (11) of cylinder, also be provided with the humidity sensor (12) that to measure solid drier (4) surrounding air humidity, the port (13) that lower cover (2) has at least a sandwich passage that forms with cylinder outer wall and the first shell to communicate, it is characterized in that: also comprise connector (14), be provided with air intake drier (32) in the lower connector (14), check valve (16), blowing device (18), lower channel hole (15) in the lower connector communicates with inner core passage (11), be provided with heater (17) in the inner core passage (11), when humidity sensor (12) detects one during more than or equal to predefined limit humidity value, activate and also open air intake drier (32), heater (17), blowing device (18) and check valve (16).
6. air dry-set according to claim 5 is characterized in that: described the first shell (3) arranges sealing gasket or adds fluid sealant with the sandwiched junction of loam cake (1) and lower cover (2).
7. air dry-set according to claim 5, it is characterized in that: described the first shell (3) is weak thermally conductive materials.
8. air dry-set according to claim 5, it is characterized in that: described the first shell (3) is transparent glass material or transparent resin material.
9. air dry-set according to claim 5 is characterized in that: described drier (4) is for graininess or be loose porous bulk or sheet.
10. air dry-set according to claim 5 is characterized in that: the humidity sensor (12) that can detect drier (4) surrounding air humidity be arranged on attaching parts (9) upper near inner core passage (11) outlet the position or be arranged on the position of the outlet of inner core passage (11).
11. air dry-set according to claim 5 is characterized in that: described lower cover (2) adopts strong thermally conductive materials.
12. air dry-set according to claim 5 is characterized in that: described check valve (16) is a kind of pressure reduction check valve or electronic check valve.
13. air dry-set according to claim 5 is characterized in that: be provided with the guiding device that the humid air air-flow that has absorbed the moisture of drier under the saturation state and formed is outwards derived in the sandwich passage that described cylinder outer wall and the first shell form.
14. air dry-set according to claim 13 is characterized in that: described guiding device is downward-sloping flow deflector or the fan that outwards blows out.
15. air dry-set according to claim 5, it is characterized in that: when humidity sensor (12) detects one during more than or equal to predefined limit humidity value, activate and order is opened air intake drier (32), heater (17), blowing device (18) and check valve (16).
16. air dry-set according to claim 5 is characterized in that: the port of described port (13) arranges air cleaner.
17. air dry-set according to claim 5 is characterized in that: being shaped as of described port (13) can allow suitable " V " shape of discharging of condensate water.
18. air dry-set according to claim 5 is characterized in that: lower connector (14) import department arranges air cleaner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110211257.8A CN102886191B (en) | 2011-07-22 | 2011-07-22 | Drying Equipment for drying air entering oil expansion tank of electric equipment |
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| CN201110211257.8A CN102886191B (en) | 2011-07-22 | 2011-07-22 | Drying Equipment for drying air entering oil expansion tank of electric equipment |
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| CN104748485A (en) * | 2015-03-25 | 2015-07-01 | 澳柯玛股份有限公司 | Automatic frost preventing device |
| CN105098628A (en) * | 2015-08-25 | 2015-11-25 | 江苏恒炫电气有限公司 | Moisture-resistant and high-heat-dissipation switch cabinet |
| CN105582789A (en) * | 2014-11-15 | 2016-05-18 | 湖北汽车工业学院 | Vehicle-mounted air dryer having humidity control apparatus |
| CN106439138A (en) * | 2016-10-25 | 2017-02-22 | 深圳市科兰德实业发展有限公司 | Constant-pressure valve capable of enabling partial pressure of water vapor to be constant |
| CN106512670A (en) * | 2016-10-30 | 2017-03-22 | 曹云霞 | Drier reduction method |
| CN106842836A (en) * | 2017-04-05 | 2017-06-13 | 武汉华星光电技术有限公司 | Drying device and the exposure imaging equipment with the drying device |
| CN107123514A (en) * | 2017-06-27 | 2017-09-01 | 广州市万源能源科技有限公司 | A kind of transformer online dry system based on sieve technology and the transformer including the system |
| CN112103043A (en) * | 2020-09-15 | 2020-12-18 | 贵州电网有限责任公司 | Intelligent maintenance-free air replacement device for transformer |
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| TW201724133A (en) * | 2015-12-31 | 2017-07-01 | Fortune Electric Co Ltd | Air respirator dryer including a pipe set, and an upper cover and a lower cover for covering the pipe set |
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| CN1860563A (en) * | 2003-12-06 | 2006-11-08 | 赖茵豪森机械制造公司 | Air de-humidifying method for oil-insulated transformer, choke coil or stepping switch uses humidity-absorbing granules heated by electric heating device |
| CN202199249U (en) * | 2011-07-22 | 2012-04-25 | 上海智瑞达电气科技有限公司 | Air drier for drying air entering oil expansion tank of electric device |
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| CN1860563A (en) * | 2003-12-06 | 2006-11-08 | 赖茵豪森机械制造公司 | Air de-humidifying method for oil-insulated transformer, choke coil or stepping switch uses humidity-absorbing granules heated by electric heating device |
| CN202199249U (en) * | 2011-07-22 | 2012-04-25 | 上海智瑞达电气科技有限公司 | Air drier for drying air entering oil expansion tank of electric device |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105582789A (en) * | 2014-11-15 | 2016-05-18 | 湖北汽车工业学院 | Vehicle-mounted air dryer having humidity control apparatus |
| CN104748485A (en) * | 2015-03-25 | 2015-07-01 | 澳柯玛股份有限公司 | Automatic frost preventing device |
| CN104748485B (en) * | 2015-03-25 | 2019-01-08 | 澳柯玛股份有限公司 | A kind of white device of automatic resistance |
| CN105098628A (en) * | 2015-08-25 | 2015-11-25 | 江苏恒炫电气有限公司 | Moisture-resistant and high-heat-dissipation switch cabinet |
| CN106439138A (en) * | 2016-10-25 | 2017-02-22 | 深圳市科兰德实业发展有限公司 | Constant-pressure valve capable of enabling partial pressure of water vapor to be constant |
| CN106439138B (en) * | 2016-10-25 | 2019-04-09 | 深圳市科兰德实业发展有限公司 | A kind of constant pressure valve of constant steam partial pressure |
| CN106512670A (en) * | 2016-10-30 | 2017-03-22 | 曹云霞 | Drier reduction method |
| CN106842836A (en) * | 2017-04-05 | 2017-06-13 | 武汉华星光电技术有限公司 | Drying device and the exposure imaging equipment with the drying device |
| CN107123514A (en) * | 2017-06-27 | 2017-09-01 | 广州市万源能源科技有限公司 | A kind of transformer online dry system based on sieve technology and the transformer including the system |
| CN107123514B (en) * | 2017-06-27 | 2023-05-09 | 广州劲源科技发展股份有限公司 | Transformer on-line drying system based on molecular sieve technology and transformer comprising same |
| CN112103043A (en) * | 2020-09-15 | 2020-12-18 | 贵州电网有限责任公司 | Intelligent maintenance-free air replacement device for transformer |
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