CN202606795U - Ceramic shell fast drying device - Google Patents
Ceramic shell fast drying device Download PDFInfo
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- CN202606795U CN202606795U CN 201220158696 CN201220158696U CN202606795U CN 202606795 U CN202606795 U CN 202606795U CN 201220158696 CN201220158696 CN 201220158696 CN 201220158696 U CN201220158696 U CN 201220158696U CN 202606795 U CN202606795 U CN 202606795U
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Abstract
The utility model discloses a ceramic shell fast drying device. The ceramic shell fast drying device comprises a seal chamber, a heating device, an evacuating device and a cooling and condensing device. The cooling and condensing device comprises a compressor, a condenser, a first evaporator, a low pressure regulating valve and an expansion valve. The compressor, the condenser, the low pressure regulating valve and the expansion valve are all located outside the seal chamber, and the first evaporator is located outside the seal chamber. An outlet of the compressor is connected with an inlet of the condenser, an outlet of the condenser is connected with an inlet of the first evaporator through the expansion valve, and an outlet of the first evaporator is connected with an inlet of the compressor through the low pressure regulating valve. The cooling and condensing device further comprises a second evaporator which is arranged in the seal chamber, and the temperature of water inside the second evaporator keeps one degree to two degrees centigrade. According to the ceramic shell fast drying device, the second evaporator which keeps at one degree to two degrees centigrade is arranged in the seal chamber, and therefore the drying speed is greatly accelerated.
Description
Technical field
The utility model relates to precision casting process, particularly a kind of pottery shell rapid drying device.
Background technology
Hot investment casting is a kind of casting method for conventional cast technology, and it can obtain relatively accurate shape and higher casting accuracy.The technical process of hot investment casting is: at first, make wax-pattern, this wax-pattern is consistent with the product size shape of required casting; Then, form the pottery shell on the wax-pattern surface of made, subsequently; Said pottery shell is carried out dewaxing treatment (remove the wax-pattern fusing back that it is inner), last, casting metal material in the pottery shell after dewaxing treatment; After treating the metal material cooled and solidified, the said pottery shell of broken removal, the foundry goods that obtains is required product.
In above-mentioned technical process, the making of pottery shell is most important, and its quality quality has determined the quality of foundry goods.At present; The pottery shell is made the method that adopts usually: shell moulding; The water-soluble silicon sol casing method of normal particularly employing, this method are to use different slurry and the sand of refractory material preparation when making the pottery shell; One deck slurry one deck sand is from level to level the surface that is accumulated in wax-pattern gradually, processes the pottery shell of required thickness.Therefore, the pottery shell structurally can be divided into surface layer, transition zone (two layers), supporting layer (backing layer) and confining bed, and wherein, surface layer, transition zone and confining bed all have only one deck, and supporting layer has multilayer usually.
Ludox is that dependence is dewatered concentrated gel and produced intensity, and therefore, in water-soluble silicon sol casing process, an important processing step promptly is that each layer of pottery shell carried out drying.
Traditional drying means is: the pottery shell is placed in the thermostatic constant wet chamber, lets it dry naturally.The pottery shell quality that this method obtains is better, but spended time is long.For common 6～8 layers pottery shell, every layer approximately needs 8～24 hours time to carry out drying, and whole pottery shell approximately needs the time in a week could accomplish making, and the length that expends time in has reduced production efficiency.
For the rapid draing of the shell of realizing making pottery, two kinds of new drying means have also been used in people's research:
First method is: utilize ensilage dump blower to dehumidify, make the rapid draing under the wind speed of 2～12 meter per seconds of pottery shell, control pottery shell surface temperature simultaneously and keep at room temperature.This method has improved the drying efficiency of pottery shell, can accomplish drying for 6 layers pottery shells in 6 hours, still; When the casting structure complicacy has hole, have the difference of windward side and lee face during air blast, speed is much smaller than general surface in the hole; Therefore; Can cause over-drying and dry deficiency to exist simultaneously, make pottery shell uneven drying, influence the quality of pottery shell.
Second method is: the pottery shell is wrapped in the powerful hygroscopic material of porous, utilizes capillarity, the moisture in the pottery shell is absorbed fast.This method also can improve the rate of drying of pottery shell, but during this method operation, just can carry out next step soaking paste after must the hygroscopic material of pottery shell surface adsorption being removed fully, and when the casting structure complicacy had hole, hygroscopic material is difficult for imbedding, can't operation.
By on can know that pottery shell drying means of the prior art is when the pottery shell structure is complicated, the quality of the shell that can not both guarantee to make pottery realizes the rapid draing of pottery shell again.
Accelerate in order to make pottery shell rate of drying; And uniform drying; And the binding ability of acquisition intensity and gas permeability performance is the pottery shell of balance comparatively, new drying means occurred, specifically sees Chinese patent 200910172987.4:A: pottery shell to be dried is put into seal chamber; B: be under the prerequisite of temperature constant state at the said pottery shell of control,, and in the given time the portion gas in the said seal chamber lowered the temperature, make the humidity condensed in the said seal chamber with the said seal chamber state that is evacuated; C: said seal chamber is carried out vacuum deflation, make said seal chamber become atmospheric pressure state again; Circulation execution in step B, C many times; D, judge that said pottery shell is whether dry, if then finish; If, then do not go to step B.It is dry to reach different effects to adopt different vacuum to vacuumize to every layer of housing: when the surface layer to said pottery shell carries out drying; The vacuum of seal chamber is 650～550 millimeter of mercuries among the said step b, and the surface layer of dry said pottery shell needs 8-18 minute; When the transition zone to said pottery shell carried out drying, the vacuum of seal chamber was 530～430 millimeter of mercuries among the said step b, and the transition zone of dry said pottery shell needs 20-40 minute; When the supporting layer to said pottery shell carries out drying; The vacuum of seal chamber is 430～330 millimeter of mercuries among the said step b; Under this vacuum, keep certain hour, the supporting layer of dry said pottery shell needs 40-60 minute, and the supporting layer of the pottery shell that makes is spongy open structure; When the confining bed to said pottery shell carried out drying, the vacuum of seal chamber was 430～330 millimeter of mercuries among the said step b, and the confining bed of dry said pottery shell needs 40-60 minute.
The employed equipment of this technical scheme is shown in Fig. 1, Fig. 2-1, Fig. 3-1:
When said apparatus is used, at first, pottery shell to be dried is placed in the seal chamber 1; Then; Utilize heater 3 control pottery shells to be in temperature constant state; Utilize vacuum extractor 4 that seal chamber 1 is evacuated again, utilize the portion gas in 2 pairs of seal chambers 1 of cooling condensing unit to lower the temperature simultaneously in the given time, make the humidity condensed in the seal chamber 1; Subsequently, seal chamber 1 is carried out vacuum deflation, make seal chamber 1 become atmospheric pressure state again; At this moment, if pottery shell bone dry then can stop drying, if pottery shell bone dry not also then need repeat the process of above-mentioned vacuumize, lower the temperature condensation and vacuum deflation.
The following scheme of cooling condensing unit 2 preferred employings:
Shown in Fig. 2-1, Fig. 3-1; Cooling condensing unit 2 comprises compressor 21, condenser 22, evaporimeter 23, low pressure modulating valve 24 and expansion valve 25; Compressor 21, condenser 22, low pressure modulating valve 24 and expansion valve 25 all are positioned at the outside of seal chamber 1; Evaporimeter 23 is positioned at the inside of seal chamber 1, wherein
The outlet of compressor 21 links to each other with the inlet of condenser 22;
The outlet of condenser 22 links to each other through the inlet of expansion valve 25 with evaporimeter 23;
The outlet of evaporimeter 23 links to each other through the inlet of low pressure modulating valve 24 with compressor 21.
During operation; Compressor 21 is delivered in the condenser 22 after at first utilizing high pressure with the compression of steam state refrigerant; Condenser 22 is cooled to liquid state with the steam state refrigerant, and will cool off the high-pressure liquid refrigerant that forms and be delivered to evaporimeter 23 through expansion valve 25, and refrigerant absorbs the heat in the seal chamber 1 in evaporimeter 23; Make the humidity condensed in the seal chamber 1; Refrigerant in the evaporimeter 23 becomes the low pressure steam state by high-pressure liquid simultaneously, flows back in the compressor 21 through low pressure modulating valve 24 then, carries out cyclic process next time.
Miscellaneous part shown in Fig. 2-1, Fig. 3-1 can be referring to the description of this patent specific embodiment part.
Even technique scheme can realize when the pottery shell structure is complicated, the even drying of the shell that also can guarantee to make pottery realizes the rapid draing of pottery shell again, and dry required time need for the conventional drying method tens hours/layers shortens to several hours to a week.On the other hand; The pottery shell that this technical scheme provides; Its supporting layer is spongy open structure; Can improve the gas permeability of pottery shell greatly, and obviously reduce psi (pound/square inch) more than the disrumpent feelings coefficient to 800 after the burning of pottery shell, make the slurry of making the pottery shell must not add any powder that collapses and just can reach preferable pottery shell condition.
But technique scheme still has weak point:
1, also leaves some room for improvement on drying time;
2, aspect energy-conservation, also leave some room for improvement;
3, evaporimeter is positioned at the inside of seal chamber, and condensation begins, and refrigerant directly carries out exchange heat through the gas in evaporimeter and the seal chamber; Owing to vacuumized in the seal chamber; Vacuum is increasingly high in the seal chamber, and the air capacity in the seal chamber is more and more littler, when the dew-point temperature of evaporimeter is more and more hanged down degree of being as low as zero; Moisture is frosting on evaporimeter, has reduced the effect of condensation.So maximum vacuum is 330 millimeter of mercuries in the prior art scheme seal chamber, just sharply reduce if improve the dehumidification by condensation effect again.But obviously vacuum is high more, and the speed that moisture in the pottery shell and gas are diffused in the seal chamber is just fast more, and amount is just big more, and pottery shell rate of drying is just fast more.Therefore how under the condition of high vacuum degree state, can also keep condensation effect is the problem that needs solution with the limit that breaks through the prior art rate of drying.
During 4, to the supporting layer drying, adopt 430～330 millimeter of mercuries to vacuumize, and keep a period of time, can realize that so spongy open structure appears in supporting layer.But make said seal chamber become atmospheric pressure state again owing to keep a period of time just to carry out vacuum deflation; Moisture in the supporting layer also fully is not diffused in the seal chamber; Want the bone dry supporting layer just to need more times ground to repeat above-mentioned steps, spun out the time, waste energy.
5, supporting layer has multilayer; And formerly form also dry supporting layer and all formed spongy open structure; Before the undried supporting layer of piling up in the back like this and the moisture of the last undried confining bed of piling up can penetrate in one deck or preceding which floor the spongy open structure; Be difficult for drying, need higher vacuum just to help drawing moisture wherein, otherwise just have under rough vacuum, aspirate more frequently to realize drying.
The utility model content
The utility model also provides a kind of pottery shell rapid drying device.
For achieving the above object, the utility model adopts following technical scheme:
A kind of pottery shell rapid drying device comprises:
Seal chamber is used to place pottery shell to be dried, and said seal chamber comprises the cavity body, and said cavity body is provided with closing door and air inlet;
Heater is used to control said pottery shell and is in temperature constant state;
Vacuum extractor is connected with said seal chamber, is used for said seal chamber is vacuumized;
The cooling condensing unit is used for the portion gas of said seal chamber is lowered the temperature, and makes the humidity condensed in the said seal chamber;
Said cooling condensing unit comprises compressor, condenser, first evaporimeter, low pressure modulating valve and expansion valve; Said compressor, condenser, low pressure modulating valve and expansion valve all are positioned at the outside of said seal chamber; Said first evaporimeter is positioned at the outside of said seal chamber, wherein
The outlet of said compressor links to each other with the inlet of said condenser;
The outlet of said condenser links to each other through the inlet of said expansion valve with said first evaporimeter;
The outlet of said first evaporimeter links to each other with the inlet of said compressor through said low pressure modulating valve;
Said cooling condensing unit also comprises one second evaporimeter that seal chamber inside has; The inlet of second evaporimeter links to each other with a delivery side of pump; The inlet of pump links to each other with the outlet of a water tank, and the inlet of water tank links to each other with first evaporimeter, and the outlet of second evaporimeter links to each other with first evaporimeter; The water of second evaporimeter carries out heat exchange with refrigerant in first evaporimeter; Water tank links to each other with an adjustable pipe, and the water temperature probe that is provided with in the water tank is connected with the control system of above-mentioned compressor and adjusting water pipe, and the water in second evaporimeter keeps 1-2 degree centigrade.
Be connected with vapour liquid separator between said compressor and the low pressure modulating valve.
Be connected with oil eliminator between said compressor and the condenser, the oil export of said oil eliminator is connected to said compressor.
Be connected with device for drying and filtering between said condenser and the expansion valve.
Be connected with water cooler between said condenser and the device for drying and filtering.
Also be provided with compressor hot, high pressure recovery tube in the said seal chamber, wherein,
The outlet of said device for drying and filtering also links to each other with an end of said compressor hot, high pressure recovery tube;
The other end of said compressor hot, high pressure recovery tube links to each other with the inlet of said expansion valve.
Said heater is positioned at said seal chamber, and said heater is an electrothermal tube.
Also be provided with vertical clapboard and fan in the said seal chamber, said vertical clapboard and fan make and form an air circulation loop in the said seal chamber, wherein,
One side of said vertical clapboard is used to place said pottery shell, and said fan is positioned at the top of said this side of vertical clapboard;
The opposite side of said vertical clapboard is placed said second evaporimeter.
The bottom of said cavity body is connected with the vacuum water butt, and the bottom of said vacuum water butt is provided with discharge outlet.
The periphery of said closing door is provided with o-ring groove, is provided with sealing ring in the said o-ring groove, and said sealing ring is the inflatable seal circle.
Be connected with the first road screen pack and the second road screen pack between said vacuum extractor and the cavity body in turn.
The air inlet of said cavity body is provided with the equal pressure electromagnetic valve of outer gas and/or outer gas is all pressed manual ball valve.
The vacuum extractor of above-mentioned pottery shell rapid drying device all is connected with the PLC controller with the cooling condensing unit.
In the utility model, be under vacuum condition, seal chamber to be carried out dehumidification by condensation, thereby make the pottery shell dry gradually.Because the humidity of pottery shell is bigger, has certain humidity pressure reduction with the outside, so the moisture in the pottery shell itself will constantly diffuse out.And vacuum state can quicken the diffusion velocity of moisture content, thereby improves the rate of drying of pottery shell greatly, and humidity pressure reduction is consistent under the vacuum state, and the moisture diffusion in the pottery shell is consistent, can not have dry difference.Simultaneously, the utility model is also lowered the temperature to the portion gas in the seal chamber, makes the humidity condensed in the seal chamber, has reduced the humidity in the seal chamber, thereby the moisture in the pottery shell is continued to external diffusion, makes the pottery shell dry gradually.In the utility model, temperature constant state can make the pottery shell volume not change; Become seal chamber again atmospheric pressure state, the shell part that can prevent to make pottery is over-drying.Even when the pottery shell structure is complicated, the quality that the utility model also can guarantee to make pottery shell realizes the rapid draing of pottery shell again.
The pottery shell that the utility model provides; Its supporting layer is spongy open structure; Can improve the gas permeability of pottery shell greatly, and obviously reduce psi (pound/square inch) more than the disrumpent feelings coefficient to 800 after the burning of pottery shell, make the slurry of making the pottery shell must not add any powder that collapses and just can reach best pottery shell condition.
In the utility model; Owing in seal chamber, be provided with second evaporimeter, the water in second evaporimeter keeps 1-2 degree centigrade, like this; Even under the very high vacuum; Water in the seal chamber can frosting on second evaporimeter yet, thereby guarantees that water can constantly diffuse out dehumidification by condensation from the pottery shell, has realized that like this vacuum that vacuumizes is much higher than 330 millimetress of mercury.Condition of high vacuum degree is accelerated the water diffusion velocity; The energy and drying time have been saved; The more existing technical scheme that vacuumizes the venting condensation repeatedly for the pottery shell of simple shape, can save 20% drying time; For complicated shape and have the pottery shell of groove deep hole, can save 30% drying time.Because that has taked quick suction vacuumizes the venting condensation operation repeatedly, can make pottery shell drying faster.After in the supporting layer part is vacuumizing, keeping the constant voltage certain hour to guarantee to form spongy open structure, moisture is blotted, avoided the time that on dry supporting layer, is consumed in the prior art through quick suction.Second evaporimeter uses independently circulating line; The effect of first evaporimeter is that the refrigerant (generally being water) in the circulating line with second evaporimeter carries out heat exchange and keeps 1-2 degree centigrade all the time to guarantee the water in second evaporimeter; Just start the compressor of first evaporimeter and connection thereof when so only needing the water temperature variation in second evaporimeter; Runnings such as condenser greatly reduce energy consumption.
Description of drawings
Fig. 1 is the structural representation of prior art pottery shell rapid drying device embodiment;
Fig. 2-1 is the structural representation of cooling condensing unit in the prior art;
Fig. 2-the 2nd, the structural representation of cooling condensing unit in the utility model;
Fig. 3-1 is a prior art internal structure sketch map;
Fig. 3-the 2nd, internal structure sketch map in the utility model;
Fig. 4 is the Facad structure sketch map after closing door is opened among Fig. 3-2 shown device embodiment;
Fig. 5 is for being positioned at the structural representation of outside vacuum extractor of seal chamber and vacuum water butt part among the device embodiment shown in Figure 4.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is elaborated.
As shown in Figure 1, it comprises:
Cooling condensing unit 2 is used for the portion gas of seal chamber 1 is lowered the temperature, and makes the humidity condensed in the seal chamber 1.
When the device of the utility model is used, at first, pottery shell to be dried is placed in the seal chamber 1; Then; Utilize heater 3 control pottery shells to be in temperature constant state; Utilize vacuum extractor 4 that seal chamber 1 is evacuated again, utilize the portion gas in 2 pairs of seal chambers 1 of cooling condensing unit to lower the temperature simultaneously in the given time, make the humidity condensed in the seal chamber 1; Subsequently, seal chamber 1 is carried out vacuum deflation, make seal chamber 1 become atmospheric pressure state again; At this moment, if pottery shell bone dry then can stop drying, if pottery shell bone dry not also then need repeat the process of above-mentioned vacuumize, lower the temperature condensation and vacuum deflation.
In the utility model, be under vacuum condition, seal chamber to be carried out dehumidification by condensation, thereby make the pottery shell dry gradually.Because the humidity of pottery shell is bigger, has certain humidity pressure reduction with the outside, so the moisture in the pottery shell itself will constantly diffuse out.And vacuum state can quicken the diffusion velocity of moisture content, thereby improves the rate of drying of pottery shell greatly, and humidity pressure reduction is consistent under the vacuum state, and the moisture diffusion in the pottery shell is consistent, can not have dry difference.Simultaneously, the utility model is also lowered the temperature to the portion gas in the seal chamber, makes the humidity condensed in the seal chamber, has reduced the humidity in the seal chamber, thereby the moisture in the pottery shell is continued to external diffusion, makes the pottery shell dry gradually.In the utility model, temperature constant state can make the pottery shell volume not change; Become seal chamber again atmospheric pressure state, the shell part that can prevent to make pottery is over-drying.Even when the pottery shell structure is complicated, the quality that the utility model also can guarantee to make pottery shell realizes the rapid draing of pottery shell again.
But different with prior art, the evaporimeter that the utility model cooling condensing unit is positioned at seal chamber is a constant temperature.
In the utility model, the following scheme of cooling condensing unit 2 preferred employings:
Shown in Fig. 2-2, Fig. 3-2; Cooling condensing unit 2 comprises compressor 21, condenser 22, evaporimeter 23, low pressure modulating valve 24 and expansion valve 25; Compressor 21, condenser 22, low pressure modulating valve 24 and expansion valve 25 all are positioned at the outside of seal chamber 1; First evaporimeter 23 is positioned at the outside of seal chamber 1, wherein
The outlet of compressor 21 links to each other with the inlet of condenser 22;
The outlet of condenser 22 links to each other through the inlet of expansion valve 25 with evaporimeter 23;
The outlet of evaporimeter 23 links to each other through the inlet of low pressure modulating valve 24 with compressor 21.
Said cooling condensing unit also comprises one second evaporimeter 100 that seal chamber 1 inside has; The inlet of second evaporimeter 100 links to each other with the outlet of a water pump 200; The inlet of water pump 200 links to each other with the outlet of a water tank 300, and the inlet of water tank 300 links to each other with first evaporimeter 23, and the outlet of second evaporimeter 100 links to each other with first evaporimeter 23; The water of second evaporimeter 100 carries out heat exchange with refrigerant in first evaporimeter 23; Water tank 300 links to each other with an adjusting water pipe 400, and the water temperature probes that are provided with in the water tank 300 are connected with the control system of above-mentioned compressor 21 and adjusting water pipe 400,1-2 degree centigrade of the water maintenance in second evaporimeter 100.
During operation; Compressor 21 is delivered in the condenser 22 after at first utilizing high pressure with the compression of steam state refrigerant; Condenser 22 is cooled to liquid state with the steam state refrigerant, and will cool off the high-pressure liquid refrigerant that forms and be delivered to evaporimeter 23 through expansion valve 25, and the refrigerant in first evaporimeter 23 absorbs the heat in the water that second evaporimeter 100 transports; Make the water in second evaporimeter 100 remain on 1-2 degree centigrade; Refrigerant in the evaporimeter 23 becomes the low pressure steam state by high-pressure liquid simultaneously, flows back in the compressor 21 through low pressure modulating valve 24 then, carries out cyclic process next time.
Second evaporimeter 100; Water pump 200; Water tank 300 is regulated water pipe 400 and is constituted an independently circulatory system, and water pump 200 is a driving force; Water tank 300 carries out the buffer storage of water; Regulate water pipe 400 water of when the water in the water tank 300 reduces to scheduled volume, transferring from the external world and replenish, the control system of control and regulation water pipe 400 adds hot water to promote the water temperature this circulatory system from regulating water pipe in the time of also can recording coolant-temperature gage at the water temperature probe in the water tank 300 and be lower than 1 degree centigrade, avoids that water temperature in second evaporimeter 100 is low excessively to cause frosting.If the control system of the water temperature probe in the water tank 300 the records coolant-temperature gage time control and regulation water pipe 400 that is higher than 2 degrees centigrade adds cold water to promote the water temperature this circulatory system from regulating water pipe.Perhaps can record at the water temperature probe in the water tank 300 water temperature will be higher than 2 degrees centigrade of time control system compressors 21 with high power work more with water for cooling so that the water temperature that gets in second evaporimeter 100 remains on 1-2 degree centigrade.After the water of second evaporimeter 100 gets into first evaporimeter 23; Can carry out heat exchange with existing hot swapping, for example, a cavity is set in first evaporimeter 23; Be provided with the heat-exchange tube that refrigerant passes through therein in the cavity; The water from second evaporimeter 100, sent here gets into this cavity, carry out heat exchange with refrigerant in the heat-exchange tube after, the output cavity is in water tank 300.Detector can be set survey the water temperature in second evaporimeter 100; And this circulatory system independently of control compressor 21, condenser 22, evaporimeter 23, low pressure modulating valve 24 and expansion valve 25; When the water temperature in second evaporimeter 100 departs from 1-2 degree centigrade of this scope; Just start this circulatory system and keep the water temperature in second evaporimeter 100; Like this, compressor 21, condenser 22, evaporimeter 23, low pressure modulating valve 24 and expansion valve 25 these energy that independently circulatory system consumed are saved a lot than prior art.
Because the temperature of second evaporimeter 100 is stabilized in 1-2 degree centigrade by control, both can play the effect of condensed water, again can frosting under condition of high vacuum degree, promoted drying efficiency greatly.
In the above-described embodiments, after refrigerant flows out from first evaporimeter 23, possibly be the vapour-liquid coexistence; Therefore; In order to protect compressor 21 not to be damaged, can be connected with vapour liquid separator 26 between compressor 21 and the low pressure modulating valve 24, be used for the fluid separation applications of refrigerant is come out; The steam state refrigerant is flow back in the compressor 21 circulate next time, the liquid coolant of separating can be transported to once more in first evaporimeter 23 and use.
Simultaneously; In the circulating line of cooling condensing unit 2, can there be the oily matter that is used to dissolve refrigerant; In order to recycle this oily matter, can be connected with oil eliminator 27 between compressor 21 and the condenser 22, the oil export of oil eliminator 27 is connected to compressor 21 again.And, in order to filter impurity in the refrigerant, improve the efficient of cooling condensation, can also be connected with device for drying and filtering 28 between condenser 22 and the expansion valve 25, be used for refrigerant is filtered.
In order further to improve cooling effect to the steam state refrigerant, can also be connected with water cooler 29 between condenser 22 and the device for drying and filtering 28, refrigerant is carried out the secondary cooling, improve the cooling condensation effect of whole cooling condensing unit 2.
Be in the process of temperature constant state at control pottery shell, in order to improve the utilization rate of heat, energy savings can also be provided with compressor hot, high pressure recovery tube 31 in seal chamber 1, wherein,
The outlet of device for drying and filtering 28 also links to each other with an end of compressor hot, high pressure recovery tube 31;
The other end of compressor hot, high pressure recovery tube 31 links to each other with the inlet of expansion valve 25.
Like this, just recycle the part heat of compressor high pressure refrigerant, practiced thrift the energy.
Shown in Fig. 3-2, the heater 3 in the utility model is used to control the pottery shell and is in 23 ± 1 degrees centigrade of temperature constant states, and it can adopt various mode of heatings and location arrangements mode, heats, is arranged on seal chamber 1 outer surface etc. like infrared ray.But, consider and preferably heater 3 is arranged in the seal chamber 1, and heater preferably adopt the speed and the temperature controlled convenience of heating electrothermal tube.
In the utility model, when drying pottery shell, one side needs control pottery shell to be in temperature constant state (needing heating); Need lower the temperature to the portion gas of seal chamber on the other hand, therefore, not disturb mutually in order to make both; And the drying efficiency of raising pottery shell, in the embodiment shown in the utility model Fig. 3-2, can also be provided with vertical clapboard 5 and fan 6 in the seal chamber 1; Vertical clapboard 5 makes with fan 6 and forms an air circulation loop in the seal chamber 1, wherein
One side of vertical clapboard 5 (left side among Fig. 3-2) is used to place the pottery shell, and fan 6 is positioned at the top of vertical clapboard 5 these sides;
The opposite side of vertical clapboard 5 (right side among Fig. 3-2) is placed second evaporimeter 100.
Like this, under the drive of fan 5, the air that fan 5 blows out can be carried into the moisture in the pottery shell second evaporimeter 100, carry out condensation by 100 pairs of moistures of second evaporimeter after, air flows back into fan 5 again, circulates next time.At this moment, in order further to improve air cycle efficiency, a diaphragm plate 7 can also be set; Diaphragm plate 7 is connected vertical clapboard 5 tops, form with vertical clapboard 5 and fall L shaped structure, and fan can be fixed on the diaphragm plate 7; Help further guiding the flow direction of air like this, improve air cycle efficiency.And, as shown in Figure 4, be in constant temperature shape body in order to control the pottery shell, heater 3 (like electrothermal tube) and compressor hot, high pressure recovery tube 31 all can with the homonymy setting of second evaporimeter 100, be positioned at the top of second evaporimeter 100.
In the utility model; Because the moisture in the seal chamber 1 has been carried out condensation; The water that condensation forms can accumulate in the bottom of seal chamber 1, and the discharge of water is as shown in Figure 5 for ease; Can connect a vacuum water butt 8 in the bottom of cavity body 11, the bottom of this vacuum water butt 8 is provided with discharge outlet 9.Like this, after pottery shell drying finishes, can easily the water that produces in the dry run be discharged in the external environment through vacuum water butt 8.
In the utility model; The sealing means of closing door is also slightly different, as shown in Figure 4 with prior art, and the utility model embodiment is that the periphery at closing door 12 is provided with o-ring groove 13; Be provided with sealing ring 14 in the o-ring groove 13, sealing circle 14 is the inflatable seal circle.During use, after closing closing door 12, in inflatable seal circle 14, pour gases at high pressure, thus sealing ring 14 heave, play sealing function; After drying finished, the gas that discharges again in the sealing ring 14 got final product.Because mostly sealing ring is packing ring in the prior art, can produce friction with the cavity body, influence the life-span of sealing ring, and behind the utility model employing inflatable seal circle, can reduce the friction of sealing ring and cavity body, improve the service life of sealing ring greatly.
In addition; In pottery shell dry run and after the dry completion of pottery shell; All need make seal chamber 1 become atmospheric pressure state again by vacuum state; Therefore, outside on the air inlet of cavity body 11, also being connected with the equal pressure electromagnetic valve 17 of gas and/or outside gas all press manual ball valve 18, both all can make extraneous air enter into seal chamber 1 these.When the equal pressure electromagnetic valve 17 of outer gas broke down, the utility model can also use outer gas all to press manual ball valve 18 to carry out manual adjustments, realized seal chamber 1 and extraneous all pressures.
The vacuum extractor 4 of above-mentioned pottery shell rapid drying device all is connected with the PLC controller with cooling condensing unit 2.In the PLC controller according to the different numbers of plies of pottery shell, different humidity, different-thickness has been write the different programs control pumpdown time, keeps vacuum time, the vacuum supervisor.For example, 33 programs can be set altogether, the operator can according to circumstances select for use.
The preferred embodiment that the above is merely the utility model is not the practical range that is used for limiting the utility model; If do not break away from the spirit and the scope of the utility model, the utility model is made amendment or is equal to replacement, all should be encompassed in the middle of the protection domain of the utility model claim.
Claims (3)
1. pottery shell rapid drying device comprises:
Seal chamber is used to place pottery shell to be dried, and said seal chamber comprises the cavity body, and said cavity body is provided with closing door and air inlet;
Heater is used to control said pottery shell and is in temperature constant state;
Vacuum extractor is connected with said seal chamber, is used for said seal chamber is vacuumized;
The cooling condensing unit is used for the portion gas of said seal chamber is lowered the temperature, and makes the humidity condensed in the said seal chamber;
Said cooling condensing unit comprises compressor, condenser, first evaporimeter, low pressure modulating valve and expansion valve; Said compressor, condenser, low pressure modulating valve and expansion valve all are positioned at the outside of said seal chamber; Said first evaporimeter is positioned at the outside of said seal chamber, wherein
The outlet of said compressor links to each other with the inlet of said condenser;
The outlet of said condenser links to each other through the inlet of said expansion valve with said first evaporimeter;
The outlet of said first evaporimeter links to each other with the inlet of said compressor through said low pressure modulating valve;
Said cooling condensing unit also comprises one second evaporimeter that seal chamber inside has; The inlet of second evaporimeter links to each other with a delivery side of pump; The inlet of pump links to each other with the outlet of a water tank, and the inlet of water tank links to each other with first evaporimeter, and the outlet of second evaporimeter links to each other with first evaporimeter; The water of second evaporimeter carries out heat exchange with refrigerant in first evaporimeter; Water tank links to each other with an adjusting water pipe, and the water temperature probe that is provided with in the water tank is connected with the control system of above-mentioned compressor and adjusting water pipe, 1-2 degree centigrade of the water maintenance in second evaporimeter.
2. pottery shell rapid drying device as claimed in claim 1 is characterized in that: be connected with vapour liquid separator between said compressor and the low pressure modulating valve; Be connected with oil eliminator between said compressor and the condenser, the oil export of said oil eliminator is connected to said compressor; Be connected with device for drying and filtering between said condenser and the expansion valve; Be connected with water cooler between said condenser and the device for drying and filtering; Also be provided with compressor hot, high pressure recovery tube in the said seal chamber, wherein, the outlet of said device for drying and filtering also links to each other with an end of said compressor hot, high pressure recovery tube; The other end of said compressor hot, high pressure recovery tube links to each other with the inlet of said expansion valve; Said heater is positioned at said seal chamber, and said heater is an electrothermal tube; Also be provided with vertical clapboard and fan in the said seal chamber, said vertical clapboard and fan make and form an air circulation loop in the said seal chamber, and wherein, a side of said vertical clapboard is used to place said pottery shell, and said fan is positioned at the top of said this side of vertical clapboard; The opposite side of said vertical clapboard is placed said second evaporimeter; The bottom of said cavity body is connected with the vacuum water butt, and the bottom of said vacuum water butt is provided with discharge outlet; The periphery of said closing door is provided with o-ring groove, is provided with sealing ring in the said o-ring groove, and said sealing ring is the inflatable seal circle; Be connected with the first road screen pack and the second road screen pack between said vacuum extractor and the cavity body in turn; The air inlet of said cavity body is provided with the equal pressure electromagnetic valve of outer gas and/or outer gas is all pressed manual ball valve.
3. pottery shell rapid drying device as claimed in claim 1 is characterized in that: the vacuum extractor of above-mentioned pottery shell rapid drying device all is connected with the PLC controller with the cooling condensing unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220158696 CN202606795U (en) | 2012-04-13 | 2012-04-13 | Ceramic shell fast drying device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220158696 CN202606795U (en) | 2012-04-13 | 2012-04-13 | Ceramic shell fast drying device |
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| Publication Number | Publication Date |
|---|---|
| CN202606795U true CN202606795U (en) | 2012-12-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220158696 Expired - Lifetime CN202606795U (en) | 2012-04-13 | 2012-04-13 | Ceramic shell fast drying device |
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| CN (1) | CN202606795U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103372631A (en) * | 2012-04-13 | 2013-10-30 | 蔡欲期 | Method and device for quickly drying ceramic shell |
-
2012
- 2012-04-13 CN CN 201220158696 patent/CN202606795U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103372631A (en) * | 2012-04-13 | 2013-10-30 | 蔡欲期 | Method and device for quickly drying ceramic shell |
| CN103372631B (en) * | 2012-04-13 | 2016-10-19 | 蔡欲期 | Method and device for quickly drying ceramic shell |
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Granted publication date: 20121219 Effective date of abandoning: 20161012 |
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