CN206643288U - A kind of hot sand preparing system of lost foam casting - Google Patents

Abstract

The utility model discloses a kind of hot sand preparing system of lost foam casting, including turnover machine and heat-exchanger rig, heat-exchanger rig includes a heat exchange container, heat exchange container is internally provided with the fluid heat transfer pipeline for heat exchange, it is characterized in that, also include dust pelletizing system, dust pelletizing system includes being arranged at the dust excluding hood of dedusting position, and and the dedusting fan that is connected with dust excluding hood, dust pelletizing system also includes the cleaning shaft being communicated between dust excluding hood and dedusting fan, and cleaning shaft includes the dust-collecting and heat exchanging pipeline being arranged in heat exchange container inner chamber.The utility model has simple in construction, and cost is cheap, and cooling effect is excellent, and molding sand cooling effectiveness is high, is influenceed by seasonal temperature small, and use is more stable, adapts to the advantages that environment temperature is more preferable.

Description

A kind of hot sand preparing system of lost foam casting

Technical field

Lost foam casting apparatus field is the utility model is related to, specifically a kind of hot sand preparing system of lost foam casting.

Background technology

Lost foam casting（Also known as cavityless casting）Being will be similar to casting dimension shapeParaffinOr bubbles model bonding group Synthetic model cluster, brushFireproof coatingAnd after drying, it is embedded in dryQuartz sandMiddle vibration molding, is poured into a mould under negative pressure, makes model gas Change, liquid metals occupies modal position, is formed after solidification coolingCastingNovel casting method.The technique is without modulus, nothing point Type face, without core, thus casting does not have overlap, burr and pattern draft, and reduce due to core combination and caused by size Error.Therefore, in the past 20 yearsTechnology of EPCRapid development has been obtained in worldwide.

On disappearance foundry production line, casting model powder needs treated by broken, screening and cooling etc. after being peeled off from casting embryo Journey sends leading portion molding procedure back to.How hot sand after wherein casting therefore rapidly carries out cooling treatment because temperature is very high It is the key for improving casting efficiency to come into operation again.

The existing casting model powder type of cooling, has following several, and a kind of is that hot sand is placed on into specified place using most traditional Temperature fall cools down, and this mode is very slow in the presence of cooling and occupied ground is larger, it is difficult to the defects of managing, it is substantially superseded. Second, being cooled down by boiling cooling bed, but the defects of equipment cost is higher, and the follow-up after-treatment waste gas of need is more be present.Three It is the most commonly used by the way of heat exchanger is cooled down, in the existing general heat exchanger type of cooling, due to water Specific heat capacity is larger, therefore is usually to realize that recirculated water cooling heat exchange is handled as circulatory mediator using cooling water.Such as ZL A kind of 201610715605.8 once disclosed lost foam production line sand quickly cooling device；A kind of once disclosed moldings that disappear of ZL Sand cooling device is made, belongs to this cooling technology by the way of circulating water.

But this common recirculated water cooling heat exchange processing mode, equally exists that occupied ground is more, and labor strength is big, The defects of environmental pollution is serious, and climate has a great influence.More more hot area（Such as Chongqing where applicant Area）Summer water temperature it is higher when, due to cooling water Hot swapping cause temperature raise after, it is difficult to fast cooling Posterior circle utilize, Cause the defects of cooling effectiveness is lower, and time-consuming for system, high energy consumption, and running noises are big occur；So that sand handling process deposits sand amount Greatly, it is if separately larger using circulating water cooling equipment volume and floor space.

Therefore the operation that the height of cooldown rate governs whole sand handling process and equipment is horizontal；For people in the art Member is necessary to research and develop a kind of cooling effect more excellent, and molding sand cooling effectiveness is high, is influenceed by seasonal temperature small, and use is more stable, adapts to The hot sand treatment technology of the more preferable evaporative pattern of environment temperature.

Utility model content

For above-mentioned the deficiencies in the prior art, technical problem to be solved in the utility model is：How a kind of knot is provided Structure is simple, and cost is cheap, and cooling effect is excellent, and molding sand cooling effectiveness is high, is influenceed by seasonal temperature small, and use is more stable, adapts to The hot sand preparing system of the more preferable lost foam casting of environment temperature.

In order to solve the above-mentioned technical problem, the utility model employs following technical scheme：

A kind of hot sand preparing system of lost foam casting, including turnover machine and heat-exchanger rig, heat-exchanger rig include a heat exchange Container, heat exchange container are internally provided with the fluid heat transfer pipeline for heat exchange, heat exchanging fluid pipeline and are arranged at heat exchange container The heat exchanging fluid that outer heat exchanging fluid cooling device is connected and supplied in it circulates, and turnover machine mould turnover direction side and heat exchange are held The linking of device upper end sand inlet, band is provided with the middle part of heat exchange container lower end and is shaked out the sand export of switch valve；Characterized in that, also include Dust pelletizing system, dust pelletizing system include being arranged at the dust excluding hood of dedusting position, and and the dedusting fan that is connected with dust excluding hood, dedusting System also includes the cleaning shaft being communicated between dust excluding hood and dedusting fan, and cleaning shaft includes being arranged at heat exchange container inner chamber In dust-collecting and heat exchanging pipeline.

So, in the utility model, the distinguished and admirable pipeline setting of dust pelletizing system is partly into heat exchange container and formed Dust-collecting and heat exchanging pipeline, heat exchange can be carried out using dust-collecting and heat exchanging pipeline and molding sand, by the dedusting inside dust-collecting and heat exchanging pipeline With the distinguished and admirable heat for taking away a part of molding sand, therefore compared with existing heat-exchanger rig, before not increasing additional heat exchange device power Put, both realize dedusting, make use of dust pelletizing system again to improve heat exchange efficiency, cleaning shaft reaches pair of dedusting and cooling Weight effect, therefore drastically increase the cooling effect that exchanged heat to molding sand.

As optimization, a jigging conveyer, jigging conveyer are correspondingly arranged on positioned at the side in turnover machine mould turnover direction Outlet and the linking of heat exchange container upper end sand inlet, dust excluding hood include being correspondingly arranged at the conveyer dedusting above jigging conveyer Cover.Specifically, jigging conveyer includes an angularly disposed delivery chute component, and delivery chute component upper end is arranged at turnover machine One side-lower in mould turnover direction, is provided with vibrator on delivery chute component, and delivery chute member lower is outlet, conveyer dust excluding hood Covering is arranged on above delivery chute component.

So, molding sand is poured into jigging conveyer by turnover machine mould turnover, is existed by the delivery chute component of jigging conveyer The conveying to molding sand is realized during vibration so that in vibration processes, partial heat and dust that molding sand is mingled with can be upper well Wind-force in the conveyer dust excluding hood of side siphons away, and reaches rough dusting and takes away the effect of heat.Jigging conveyer is using vibration Mode convey molding sand, the dust excluding hood for coordinating top to set, the dust for enabling in molding sand be mingled with during vibration can be gone out by shake And taken away by distinguished and admirable, improve dust removing effects.

As optimization, the heat exchanging fluid in the heat exchanging fluid pipeline is gaseous refrigerant, the heat exchanging fluid cooling dress Compressor of air conditioner and A/C evaporator including series connection are put, compressor of air conditioner is used for gaseous refrigerant boil down to liquid, air-conditioning Evaporator is used for the gaseous state that the refrigerant of liquid is converted into low temperature.

So using gaseous refrigerant as heat exchanging fluid, the mode phase of the mode of this air cooling and existing conventional water cooling Than gaseous refrigerant can rely on compressor of air conditioner and A/C evaporator rapidly to cool and take away in heat exchanging fluid cooling device Heat, can fast cooling Posterior circle utilize, drastically increase heat exchange efficiency, so, and using cooling water as changing The water-cooling pattern of hot fluid is compared, and the cooling of heat exchanging fluid is influenceed smaller by temperature.It is set to be particularly suitable for being difficult to soon in cooling water The high temperature area of prompt drop temperature processing uses.

As optimization, the heat-exchanger rig includes a pre- colod-application heat exchange container and the heat exchange of a cooling is held Device, turnover machine mould turnover direction side and pre- colod-application heat exchange container upper end sand inlet are connected, and are brought out under pre- colod-application heat exchange container Sha Kou sides are additionally provided with the bypass of outer end obliquely and go out sandpipe, bypass out sandpipe and the heat exchange container upper end sand inlet of cooling Linking, the heat exchange container lower end sand export of cooling are used to shake out to lost foam casting boxcar；In pre- colod-application heat exchange container Circulated again with heat exchanging fluid cooling device after heat exchanging fluid pipeline communication in heat exchanging fluid pipeline and the heat exchange container of cooling Connection.

So, two sets of heat exchange containers arranged side by side are employed in heat-exchanger rig to be used in series, one is realized precooling, a realization Cooling, drastically increases cooling effect and cooling treatment efficiency.

As optimization, the charging side of heat exchange container is also vertically provided with an elevator side by side in the heat-exchanger rig, Elevator lower end is provided with enters sand hopper for entering the elevator of sand, and elevator upper end sand export is sent by what outer end was set obliquely Sand cylinder is connected to the sand inlet of heat exchange container upper end.

So, laggard sand is lifted to heat exchange container using elevator so that heat exchange container can be arranged at together with turnover machine One ground, it is beneficial to layout and install, save space.

As optimization, elevator includes vertically arranged elevator shell, and elevator shell inner cavity upper and lower ends are provided with Sprocket wheel, upper end sprocket wheel and the elevator motor drive connection positioned at elevator housing exterior, it is arranged with the sprocket wheel of upper and lower ends In vertical annular loop chain, chain bucket is provided with loop chain, enter sand from elevator when chain bucket is moved across after the sprocket wheel of lower end with loop chain Bucket connects sand, and from elevator upper end, sand export shakes out after the sprocket wheel of upper end.Circular chain bucket hoister is so used, can be preferably Blocking is avoided, ensures that work is smooth.Existing belt elevator or wire belt bucket can also be used when implementing certainly The existing Structure of hoist such as formula elevator realizes lifting.

As optimization, the heat exchange container lower end is additionally provided with outer end close to elevator side and is connected to elevator obliquely Enter the sand-returning pipe of sand hopper, sand switch valve is provided with back on sand-returning pipe.So, molding sand can be opened back after being exchanged heat in heat exchange container Sandpipe realizes back sand to elevator, again returns to heat exchange container and realizes heat exchange, and then realizes and the cycle heat exchange of molding sand is handled, Until temperature, which is reduced to, meets that requirement turns off back sand switch valve, ensure heat transfer effect.

As optimization, vibration is horizontally arranged with along inner chamber positioned at adjacent below the sand inlet of upper end in heat exchange container inner chamber Material screen, it is the heat transfer space for being provided with fluid heat transfer pipeline and dust-collecting and heat exchanging pipeline to vibrate below equal material screen.

So, it can rely on and vibrate equal material screen vibrating shakeout, improve the uniformity of knockout distribution to improve heat transfer effect.

Further, vibrating equal material screen includes being transversely mounted in the middle part of heat exchange container inner chamber the curved arc that raises up Shape screen cloth, in addition to the shaker screen on screen cloth；It is inside at the sand inlet of upper end in the heat exchange container inner chamber Be extended have a tubular enter sand cylinder, enter sand cylinder obliquely and export top in the middle part of face curved screen to set.

So so that enter sand cylinder knockout to screen cloth, sand is left out by mistake under during molding sand slides in the middle part of screen cloth to surrounding, Preferably it is beneficial to improve the uniformity that knockout is distributed in the horizontal direction, preferably to improve heat transfer effect.

As optimization, heat exchange container inner chamber upper end is additionally provided with heat exchange container dust excluding hood, and heat exchange container dust excluding hood upper end leads to Piping is connected in cleaning shaft.

So, heat exchange container dust excluding hood, which can be exchanged, produces upward distinguished and admirable suction inside heat container so that heat exchange container Interior knockout with fluid heat transfer pipeline and dust-collecting and heat exchanging pipeline while being exchanged heat, by distinguished and admirable up band from the bottom up Heat is walked, realizes multiple heat transfer effect, improves heat exchange efficiency；In addition, upward wind can be relied on during knockout drops Stream enables tiny dust in molding sand preferably to be taken away by distinguished and admirable, realizes molding sand type selecting effect, and molding sand is follow-up without entering again The processing of the type selectings such as row cleaning, drying, improve molding sand processing whole efficiency.When it is implemented, heat exchange container dust excluding hood is covered in screen cloth Top, upward distinguished and admirable suction will preferably can be shaken on screen cloth upwards through screen cloth caused by such heat exchange container dust excluding hood Molding sand in the dust that is mingled with take away, improve molding sand dust removing effects, while vibration that can also be preferably with screen cloth coordinates, and improves Uniform effect of the molding sand on screen cloth, the uniformity that molding sand falls preferably is improved, and then preferably improve molding sand and hold in heat exchange Heat transfer effect in device inner chamber.

As optimization, a dedusting interlayer cavity, two dedusting interlayers are each provided with left and right sides of heat exchange container More spaced dust-collecting and heat exchanging pipelines arranged side by side are provided with and communicated between cavity, two dedusting interlayer cavitys each outwards connect Pass in cleaning shaft；The left and right sides of heat exchange container is also each provided with a heat exchanging fluid interlayer cavity, two heat exchanging fluids More spaced fluid heat transfer pipelines arranged side by side are provided with and communicated between interlayer cavity, two heat exchanging fluid interlayer cavitys are each Outwards pass through pipeline communication to heat exchanging fluid cooling device.

So, the structure can realize well carries out distinguished and admirable be incorporated into heat exchange container inner chamber of dust pelletizing system Exchange heat to improve the heat exchanger effectiveness of molding sand.Specifically, a dedusting interlayer is each provided with left and right sides of heat exchange container Cavity, dedusting air-flow are entered in heat exchange container inner chamber by dedusting with interlayer cavity and then through excessive dirt heat exchange pipeline of eradicating Exchanged heat；With reference to the heat exchange of more fluid heat transfer pipelines, changing for the molding sand that is dropped in heat exchanging container intracavity is greatly enhanced Thermal effect.

Further, heat exchange container horizontal cross-section is rectangle, is so more favorable for each interlayer cavity and dust-collecting and heat exchanging pipe The arrangement in road and fluid heat transfer pipeline, improve space efficiency utilization.

Further, dedusting interlayer cavity is located on the outside of heat exchanging fluid interlayer cavity, and dedusting is with the middle part of interlayer cavity Each outwards it is communicated to by one in the plenum chamber of outside taper type in cleaning shaft.So, the plenum chamber of setting causes Dedusting is distinguished and admirable can lean on plenum chamber rectification after enter in dust-collecting and heat exchanging pipeline, reduce pneumatic noise, while beneficial to dedusting it is distinguished and admirable In dust settled in plenum chamber and dedusting with converging in interlayer cavity, beneficial to improving follow-up air-flow velocity.Dedusting interlayer Cavity, which is arranged at outside, can conveniently set its interior laying dust of cleaning.

Further, dedusting offers dedusting cleaning door with lower end on the outside of interlayer cavity, is easy to open cleaning dust.

Further, the heat exchanging fluid interlayer cavity upper end of heat exchange container side is outwards connected and connected by upward pipeline Heat exchanging fluid cooling device is connected to, the heat exchanging fluid interlayer cavity lower end of heat exchange container opposite side is outwards connected by downward pipeline Go out and be connected to heat exchanging fluid cooling device.The connection of pipeline is so facilitated to install, while beneficial to the overall circulation of heat exchanging fluid Flowing.

As optimization, the dust-collecting and heat exchanging pipeline is and distinguished and admirable inside direction diagonally downward and pipeline to be in tilted layout Flow direction is consistent.So, can prevent it is distinguished and admirable in the dust that is mingled with accumulated in dust-collecting and heat exchanging pipeline and cause blocking or drop The low distinguished and admirable flow velocity of dedusting.

Further, the dust-collecting and heat exchanging pipeline and fluid heat transfer pipeline are along horizontal arranged, and each in rows It is correspondingly arranged to be multiple rows of, fluid heat transfer pipeline edge and the opposite direction of dust-collecting and heat exchanging pipeline along the arrangement of short transverse uniform intervals It is in tilted layout to be formed staggeredly, and it is intervening portion often to exclude dirt heat exchange pipeline and fluid heat transfer pipeline centre position.So, pipeline Being in tilted layout can avoid knockout from being accumulated in pipeline external surface, while the pipeline of alternating inclinations arrangement can also avoid guiding from falling Sand migrates toward same direction, therefore can better ensure that the uniformity that molding sand falls in heat exchange container, preferably to improve heat Exchange efficiency.

As optimization, the dust-collecting and heat exchanging pipeline and fluid heat transfer pipeline external surface are each arranged at intervals with aluminum fin-stock. It so can preferably improve the heat exchanger effectiveness with knockout.

Further, the aluminum fin-stock of dust-collecting and heat exchanging pipeline and fluid heat transfer pipeline external surface each along pipeline front and rear sides to Outer lug is formed and is obliquely installed in the same direction with pipeline（During specific implementation aluminum fin-stock angle of inclination be more than place pipeline angle of inclination with Slid beneficial to molding sand）, often eradicate the aluminum fin-stock of dirt heat exchange pipeline have on corresponding fluid heat transfer pipeline staggeredly it is vertical right The aluminum fin-stock answered, and the vertical projection of the aluminum fin-stock lower half of each dust-collecting and heat exchanging pipeline and the corresponding layer fluid heat exchange pipeline On aluminum fin-stock lower half vertical projection have one coincidence part.So aluminum fin-stock prolong fore-and-aft direction be extended can Heat exchanger effectiveness is also improved to improve itself and the contact effect for the molding sand that drops, while corresponding aluminum fin-stock is erecting on adjacent pipeline Dislocation overlapping arrangement upwards so that the molding sand slid on the aluminum fin-stock of each dust-collecting and heat exchanging pipeline can be dropped to corresponding to lower section Aluminum fin-stock surface on fluid heat transfer pipeline, and then enable molding sand to form the left successively of class zigzag in heat exchange container inner chamber Right deflecting is staggeredly fallen.So, residence time of the molding sand in heat exchange container is dramatically improved, also high degree raising type The contact heat-exchanging efficiency of sand and aluminum fin-stock so that molding sand heat exchange cooling effect is greatly improved.

In summary, the utility model has simple in construction, and cost is cheap, and cooling effect is excellent, and molding sand cooling effectiveness is high, Influenceed by seasonal temperature small, use is more stable, adapts to the advantages that environment temperature is more preferable.

Brief description of the drawings

Fig. 1 is structural representation of the present utility model.

Fig. 2 is the structural representation of an independent heat exchange container in Fig. 1, the structural representation of display portion aluminum fin-stock in figure.

Fig. 3 is Fig. 2 horizontal cross, and aluminum fin-stock structure is not shown in figure.

Fig. 4 is that the utility model shows that molding sand slides the schematic diagram of process between aluminum fin-stock.

Embodiment

The utility model is described in further detail below in conjunction with the accompanying drawings.

During specific implementation：As Figure 1-4, the hot sand preparing system of a kind of lost foam casting, including turnover machine 1 and heat exchange fill Put, heat-exchanger rig includes a heat exchange container 2, and heat exchange container 2 is internally provided with the fluid heat transfer pipeline 3 for heat exchange, changed Hot fluid pipeline 3 connects with the heat exchanging fluid cooling device 4 being arranged at outside heat exchange container 2 and for the heat exchanging fluid recycle stream in it Dynamic, the mould turnover direction side of turnover machine 1 and the upper end sand inlet linking of heat exchange container 2, the lower end of heat exchange container 2 middle part is provided with band and shaked out The sand export 5 of switch valve；Wherein, in addition to dust pelletizing system, dust pelletizing system include being arranged at the dust excluding hood of dedusting position, Yi Jihe The dedusting fan 6 being connected with dust excluding hood, dust pelletizing system also include the cleaning shaft 7 being communicated between dust excluding hood and dedusting fan, Cleaning shaft includes the dust-collecting and heat exchanging pipeline 8 being arranged in heat exchange container inner chamber.During implementation, dedusting fan outlet side and dust removing cloth Bag, which is connected, forms bag-type dust removal system.

So, in the utility model, the distinguished and admirable pipeline setting of dust pelletizing system is partly into heat exchange container and formed Dust-collecting and heat exchanging pipeline, heat exchange can be carried out using dust-collecting and heat exchanging pipeline and molding sand, by the dedusting inside dust-collecting and heat exchanging pipeline With the distinguished and admirable heat for taking away a part of molding sand, therefore compared with existing heat-exchanger rig, before not increasing additional heat exchange device power Put, both realize dedusting, make use of dust pelletizing system again to improve heat exchange efficiency, cleaning shaft reaches pair of dedusting and cooling Weight effect, therefore drastically increase the cooling effect that exchanged heat to molding sand.

Wherein, a jigging conveyer 9 is correspondingly arranged on positioned at the side in the mould turnover direction of turnover machine 1, jigging conveyer 9 goes out Mouth and the linking of heat exchange container upper end sand inlet, dust excluding hood include being correspondingly arranged at the conveyer dust excluding hood above jigging conveyer 10.Specifically, jigging conveyer includes an angularly disposed delivery chute component, and delivery chute component upper end is arranged at turnover machine One side-lower in mould turnover direction, is provided with vibrator on delivery chute component, and delivery chute member lower is outlet, conveyer dust excluding hood Covering is arranged on above delivery chute component.

So, molding sand is poured into jigging conveyer by turnover machine mould turnover, is existed by the delivery chute component of jigging conveyer The conveying to molding sand is realized during vibration so that in vibration processes, partial heat and dust that molding sand is mingled with can be upper well Wind-force in the conveyer dust excluding hood of side siphons away, and reaches rough dusting and takes away the effect of heat.Jigging conveyer is using vibration Mode convey molding sand, the dust excluding hood for coordinating top to set, the dust for enabling in molding sand be mingled with during vibration can be gone out by shake And taken away by distinguished and admirable, improve dust removing effects.

Wherein, the heat exchanging fluid in the heat exchanging fluid pipeline 3 is gaseous refrigerant, the heat exchanging fluid cooling device 4 Compressor of air conditioner and A/C evaporator including series connection, compressor of air conditioner are used to steam in gaseous refrigerant boil down to liquid, air-conditioning Hair device is used for the gaseous state that the refrigerant of liquid is converted into low temperature.

So using gaseous refrigerant as heat exchanging fluid, the mode phase of the mode of this air cooling and existing conventional water cooling Than gaseous refrigerant can rely on compressor of air conditioner and A/C evaporator rapidly to cool and take away in heat exchanging fluid cooling device Heat, can fast cooling Posterior circle utilize, drastically increase heat exchange efficiency, so, and using cooling water as changing The water-cooling pattern of hot fluid is compared, and the cooling of heat exchanging fluid is influenceed smaller by temperature.It is set to be particularly suitable for being difficult to soon in cooling water The high temperature area of prompt drop temperature processing uses.

Wherein, the heat-exchanger rig includes a pre- colod-application heat exchange container and the heat exchange container of a cooling, turns over The mould turnover direction side of punch-out equipment 1 and pre- colod-application heat exchange container upper end sand inlet linking, pre- colod-application heat exchange container lower end sand export Side is additionally provided with the bypass of outer end obliquely and goes out sandpipe 11, bypasses out sandpipe 11 and the heat exchange container upper end sand inlet of cooling Linking, the heat exchange container lower end sand export of cooling are used to shake out to lost foam casting boxcar；In pre- colod-application heat exchange container Circulated again with heat exchanging fluid cooling device after heat exchanging fluid pipeline communication in heat exchanging fluid pipeline and the heat exchange container of cooling Connection.

So, two sets of heat exchange containers arranged side by side are employed in heat-exchanger rig to be used in series, one is realized precooling, a realization Cooling, drastically increases cooling effect and cooling treatment efficiency.During implementation, bypass out and switch valve is also equipped with sandpipe, make It can be used alone with single heat exchange container.

Wherein, the charging side of heat exchange container is also vertically provided with an elevator 12 side by side in the heat-exchanger rig, carries Rise the lower end of machine 12 and be provided with and enter sand hopper 13 for entering the elevator of sand, the upper end sand export of elevator 12 is set obliquely by outer end Send the sand inlet that sand cylinder 14 is connected to heat exchange container upper end.

So, laggard sand is lifted to heat exchange container using elevator so that heat exchange container can be arranged at together with turnover machine One ground, it is beneficial to layout and install, save space.

Wherein, elevator 12 includes vertically arranged elevator shell, and elevator shell inner cavity upper and lower ends are provided with chain Take turns, upper end sprocket wheel and the drive connection of elevator motor 15 positioned at elevator housing exterior, be arranged with the sprocket wheel of upper and lower ends In vertical annular loop chain 16, chain bucket is provided with loop chain 16, from elevator when chain bucket is moved across after the sprocket wheel of lower end with loop chain Enter sand hopper and connect sand, sand export shakes out from elevator upper end after the sprocket wheel of upper end.So use circular chain bucket hoister, Neng Gougeng Blocking is avoided well, ensures that work is smooth.Existing belt elevator or steel wire rubber can also be used when implementing certainly The existing Structure of hoist such as band bucket elevator realize lifting.

Wherein, the lower end of heat exchange container 2, which close to elevator side is additionally provided with outer end and is connected to elevator obliquely, enters The sand-returning pipe 17 of sand hopper, sand switch valve is provided with back on sand-returning pipe 17.So, can be opened after molding sand exchanges heat in heat exchange container Sand-returning pipe realizes back that sand to elevator, again returns to heat exchange container and realizes heat exchange, and then realize to the cycle heat exchange of molding sand Reason, until temperature, which is reduced to, meets that requirement turns off back sand switch valve, ensure heat transfer effect.

Wherein, it is horizontally arranged with vibration homocline along inner chamber positioned at adjacent below the sand inlet of upper end in heat exchange container inner chamber Sieve, it is the heat transfer space for being provided with fluid heat transfer pipeline 3 and dust-collecting and heat exchanging pipeline 8 to vibrate below equal material screen.

So, it can rely on and vibrate equal material screen vibrating shakeout, improve the uniformity of knockout distribution to improve heat transfer effect.

Wherein, vibrating equal material screen includes being transversely mounted in the middle part of heat exchange container inner chamber the curved sieve bend that raises up Net 18, in addition to the shaker screen 19 on screen cloth；It is inside at the sand inlet of upper end in the heat exchange container inner chamber Be extended have a tubular enter sand cylinder 20, enter sand cylinder 20 obliquely and export the middle part of face curved screen 18 top to set.

So so that enter sand cylinder knockout to screen cloth, sand is left out by mistake under during molding sand slides in the middle part of screen cloth to surrounding, Preferably it is beneficial to improve the uniformity that knockout is distributed in the horizontal direction, preferably to improve heat transfer effect.

Wherein, heat exchange container inner chamber upper end is additionally provided with heat exchange container dust excluding hood 21, and the upper end of heat exchange container dust excluding hood 21 leads to Piping is connected in cleaning shaft 7.

So, heat exchange container dust excluding hood, which can be exchanged, produces upward distinguished and admirable suction inside heat container so that heat exchange container Interior knockout with fluid heat transfer pipeline and dust-collecting and heat exchanging pipeline while being exchanged heat, by distinguished and admirable up band from the bottom up Heat is walked, realizes multiple heat transfer effect, improves heat exchange efficiency；In addition, upward wind can be relied on during knockout drops Stream enables tiny dust in molding sand preferably to be taken away by distinguished and admirable, realizes molding sand type selecting effect, and molding sand is follow-up without entering again The processing of the type selectings such as row cleaning, drying, improve molding sand processing whole efficiency.When it is implemented, heat exchange container dust excluding hood is covered in screen cloth Top, upward distinguished and admirable suction will preferably can be shaken on screen cloth upwards through screen cloth caused by such heat exchange container dust excluding hood Molding sand in the dust that is mingled with take away, improve molding sand dust removing effects, while vibration that can also be preferably with screen cloth coordinates, and improves Uniform effect of the molding sand on screen cloth, the uniformity that molding sand falls preferably is improved, and then preferably improve molding sand and hold in heat exchange Heat transfer effect in device inner chamber.During implementation, set positioned at heat transfer space bottom in heat exchange container and positioned at the top position of sand export 5 There is the blast pipe 22 that outer end opening is bent upwards, so that heat exchange container dust excluding hood suction air in heat transfer space with so that form under Up distinguished and admirable takes away heat, to realize above-mentioned multiple heat transfer effect；The blast pipe being bent upwards simultaneously can avoid knockout Blown out from blast pipe.

Wherein, the left and right sides of heat exchange container 2 is each provided with a dedusting interlayer cavity 23, and two dedustings are empty with interlayer Be provided with and communicated with more spaced dust-collecting and heat exchanging pipelines 8 arranged side by side between chamber 23, two dedustings with interlayer cavity 23 each to It is communicated to outside in cleaning shaft 7；The left and right sides of heat exchange container 2 is also each provided with a heat exchanging fluid interlayer cavity 24, two More spaced fluid heat transfer pipelines 3 arranged side by side, two heat exchanging fluids are provided with and communicated between heat exchanging fluid interlayer cavity 24 Interlayer cavity 24 each outwards passes through pipeline communication to heat exchanging fluid cooling device 4.

So, the structure can realize well carries out distinguished and admirable be incorporated into heat exchange container inner chamber of dust pelletizing system Exchange heat to improve the heat exchanger effectiveness of molding sand.Specifically, a dedusting interlayer is each provided with left and right sides of heat exchange container Cavity, dedusting air-flow are entered in heat exchange container inner chamber by dedusting with interlayer cavity and then through excessive dirt heat exchange pipeline of eradicating Exchanged heat；With reference to the heat exchange of more fluid heat transfer pipelines, changing for the molding sand that is dropped in heat exchanging container intracavity is greatly enhanced Thermal effect.

Wherein, the horizontal cross-section of heat exchange container 2 is rectangle, be so more favorable for each interlayer cavity and dust-collecting and heat exchanging pipeline and The arrangement of fluid heat transfer pipeline, improve space efficiency utilization.

Wherein, dedusting interlayer cavity 23 is located at the outside of heat exchanging fluid interlayer cavity 24, and dedusting is with interlayer cavity 23 Portion is each outwards communicated in cleaning shaft 7 by one in the plenum chamber 25 of outside taper type.So, the plenum chamber of setting So that dedusting is distinguished and admirable can lean on plenum chamber rectification after enter in dust-collecting and heat exchanging pipeline, reduce pneumatic noise, while be beneficial to dedusting Dust in distinguished and admirable is settled in plenum chamber and dedusting with convergence in interlayer cavity, beneficial to the follow-up air-flow velocity of raising.Dedusting is used Interlayer cavity, which is arranged at outside, conveniently to set enabling to clear up its interior laying dust.Meanwhile the plenum chamber of setting be smaller diameter end to It outer taper type, can preferably be connected with cleaning shaft linking, avoid wind section from becoming the excessive vortex of big generation suddenly and stream And enable dust preferably preliminary sedimentation in dedusting interlayer cavity, made with avoiding dust from entering in dust-collecting and heat exchanging pipeline Into blocking and reduce heat exchanger effectiveness.

Wherein, dedusting offers dedusting cleaning door 26 with the outside lower end of interlayer cavity 23, is easy to open cleaning dust.

Wherein, the upper end of heat exchanging fluid interlayer cavity 24 of the side of heat exchange container 2 is outwards connected and connected by upward pipeline Be connected to heat exchanging fluid cooling device 4, the lower end of heat exchanging fluid interlayer cavity 24 of heat exchange container opposite side by downward pipeline to Connect outside and be connected to heat exchanging fluid cooling device 4.The connection of pipeline is so facilitated to install, while beneficial to the entirety of heat exchanging fluid Circulate.

Wherein, the dust-collecting and heat exchanging pipeline 8 is is in tilted layout, and the distinguished and admirable flowing inside direction diagonally downward and pipeline Direction is consistent.So, can prevent it is distinguished and admirable in the dust that is mingled with accumulated in dust-collecting and heat exchanging pipeline and cause blocking or reduction to remove The distinguished and admirable flow velocity of dirt.

Wherein, the dust-collecting and heat exchanging pipeline 8 and fluid heat transfer pipeline 3 are along level arranged, and each right in rows It should be arranged to along the arrangement of short transverse uniform intervals to be multiple rows of, the edge of fluid heat transfer pipeline 3 and the opposite direction of dust-collecting and heat exchanging pipeline 8 It is in tilted layout to be formed staggeredly, and it is intervening portion often to exclude dirt heat exchange pipeline and fluid heat transfer pipeline centre position.So, pipeline Being in tilted layout can avoid knockout from being accumulated in pipeline external surface, while the pipeline of alternating inclinations arrangement can also avoid guiding from falling Sand migrates toward same direction, therefore can better ensure that the uniformity that molding sand falls in heat exchange container, preferably to improve heat Exchange efficiency.

Wherein, dust-collecting and heat exchanging pipeline 8 and fluid heat transfer pipeline 3 outer surface is each arranged at intervals with aluminum fin-stock 27. It so can preferably improve the heat exchanger effectiveness with knockout.

Wherein, Fig. 4 is participated in, the aluminum fin-stock 27 of dust-collecting and heat exchanging pipeline and fluid heat transfer pipeline external surface is each along before and after pipeline Both sides outwardly convex is formed and is obliquely installed in the same direction with pipeline（Aluminum fin-stock angle of inclination tilts more than place pipeline during specific implementation Angle slides in favor of molding sand）, the aluminum fin-stock for often eradicating dirt heat exchange pipeline has on corresponding fluid heat transfer pipeline staggeredly Aluminum fin-stock corresponding to vertical, and the vertical projection of the aluminum fin-stock lower half of each dust-collecting and heat exchanging pipeline and the corresponding layer fluid are changed The vertical projection of the lower half of aluminum fin-stock on hot channel has the part of a coincidence.So aluminum fin-stock prolongs fore-and-aft direction extension Setting can improve it and also improve heat exchanger effectiveness, while corresponding aluminium on adjacent pipeline with the contact effect for the molding sand 28 that drops Fin dislocation overlapping arrangement on vertical so that the molding sand slid on the aluminum fin-stock of each dust-collecting and heat exchanging pipeline can drop to down Aluminum fin-stock surface corresponding to side on fluid heat transfer pipeline, and then enable molding sand to form class in heat exchange container inner chamber in a zigzag The deflecting of left and right successively staggeredly fall.So, residence time of the molding sand in heat exchange container is dramatically improved, also very big journey Degree improves the contact heat-exchanging efficiency of molding sand and aluminum fin-stock so that molding sand heat exchange cooling effect is greatly improved.

So, when said system works, vanishing-die casting moulding-sand enters jigging conveyer through turnover machine, in vibrating transportation Heat and the dust being mingled with preliminarily are taken away under the distinguished and admirable suction that machine vibration and upper conveyor dust excluding hood provide, is reached Rough dusting and the effect of cooling.Then elevator of the molding sand after jigging conveyer by pre- colod-application heat exchange container enters The heat exchange container of first preheating, on the curved screen of heat exchange container upper end, provided by vibration and heat exchange container dust excluding hood Distinguished and admirable suction, take away heat and dust again；The special construction of curved screen, which combines, simultaneously vibrates and aspirates wind-force, being capable of band Ejector half sand more uniformly slides from curved screen；By upward wind-force band when molding sand is in vacant state in dropping process Heat is walked, during in aluminum fin-stock contact condition with dust-collecting and heat exchanging pipeline and fluid heat transfer pipeline and its two surface, is carried out Cooling is realized in heat exchange, has been achieved in that the effect of MULTIPLE DYNAMIC cooling, and make use of the pipeline of dust pelletizing system to turn into cooling source Drastically increase heat exchanger effectiveness.The special construction of aluminum fin-stock sets the contact heat-exchanging effect also improved with molding sand simultaneously. After molding sand drops out heat transfer space downwards, can also as desired by the control to switch valve, make its from sand-returning pipe return sand to Elevator realizes that cycle heat exchange is handled, until be cooled to be adapted to after open sand export again and shake out, this sample loading mode is particularly suitable for interval Sequencing batch type molding sand cooling treatment.When needing to realize continuous processing and treating capacity is larger causes single heat exchange container can not meet to exchange heat During processing, the sand-returning pipe and sand export of pre- colod-application heat exchanger can also be closed, it is opened and bypasses out second heat exchange of sandpipe connection Container（The heat exchange container of i.e. above-mentioned cooling）Meet the heat exchange demand of continous way processing by two heat exchange container cooperations. Therefore the system has that heat exchange efficiency is high, molding sand treating capacity is big and the characteristics of can realizing a variety of heat exchange modes.

Claims (10)

1. a kind of hot sand preparing system of lost foam casting, including turnover machine and heat-exchanger rig, heat-exchanger rig includes a heat exchange and held Device, heat exchange container are internally provided with the fluid heat transfer pipeline for heat exchange, heat exchanging fluid pipeline and are arranged at outside heat exchange container The heat exchanging fluid cooling device heat exchanging fluid that connects and supply in it circulate, turnover machine mould turnover direction side and heat exchange container The linking of upper end sand inlet, band is provided with the middle part of heat exchange container lower end and is shaked out the sand export of switch valve；Characterized in that, also include removing Dirt system, dust pelletizing system include being arranged at the dust excluding hood of dedusting position, and and the dedusting fan that is connected with dust excluding hood, dedusting system System also includes the cleaning shaft being communicated between dust excluding hood and dedusting fan, and cleaning shaft includes being arranged in heat exchange container inner chamber Dust-collecting and heat exchanging pipeline.

2. the hot sand preparing system of lost foam casting as claimed in claim 1, it is characterised in that positioned at turnover machine mould turnover direction Side is correspondingly arranged on a jigging conveyer, jigging conveyer outlet and the linking of heat exchange container upper end sand inlet, dust excluding hood bag Include the conveyer dust excluding hood being correspondingly arranged above jigging conveyer.

3. the hot sand preparing system of lost foam casting as claimed in claim 1, it is characterised in that in the heat exchanging fluid pipeline Heat exchanging fluid is gaseous refrigerant, and the heat exchanging fluid cooling device includes the compressor of air conditioner and A/C evaporator of series connection, empty Compressor is adjusted to be used for gaseous refrigerant boil down to liquid, A/C evaporator is used for the gas that the refrigerant of liquid is converted into low temperature State.

4. the hot sand preparing system of lost foam casting as claimed in claim 1, it is characterised in that the heat-exchanger rig includes one Individual pre- colod-application heat exchange container and the heat exchange container of a cooling, turnover machine mould turnover direction side and pre- colod-application heat exchange container Upper end sand inlet linking, pre- colod-application heat exchange container lower end sand export side are additionally provided with the bypass of outer end obliquely and go out sandpipe, The heat exchange container upper end sand inlet linking of sandpipe and cooling is bypassed out, the heat exchange container lower end sand export of cooling is used to shake out To lost foam casting boxcar；Heat exchanging fluid pipeline in pre- colod-application heat exchange container and the heat exchange stream in the heat exchange container of cooling Connected again with the circulation of heat exchanging fluid cooling device after body pipeline communication.

5. the hot sand preparing system of lost foam casting as claimed in claim 1, it is characterised in that exchange heat and hold in the heat-exchanger rig The charging side of device is also vertically provided with an elevator side by side, and elevator lower end is provided with enters sand for entering the elevator of sand Bucket, the sand inlet for sending sand cylinder to be connected to heat exchange container upper end that elevator upper end sand export is set obliquely by outer end.

6. the hot sand preparing system of lost foam casting as claimed in claim 1, it is characterised in that positioned at upper in heat exchange container inner chamber Adjacent is horizontally arranged with the equal material screen of vibration along inner chamber below the sand inlet of end, and it is to be provided with fluid heat transfer pipe to vibrate below equal material screen The heat transfer space in road and dust-collecting and heat exchanging pipeline.

7. the hot sand preparing system of lost foam casting as claimed in claim 1, it is characterised in that heat exchange container inner chamber upper end is also set Heat exchange container dust excluding hood is equipped with, heat exchange container dust excluding hood upper end is connected in cleaning shaft by pipeline.

8. the hot sand preparing system of lost foam casting as claimed in claim 1, it is characterised in that heat exchange container is each side It is provided with a dedusting interlayer cavity, two dedustings spaced are side by side removed with being provided with and communicated with more between interlayer cavity Dirt heat exchange pipeline, two dedustings are each outwards communicated in cleaning shaft with interlayer cavity；The left and right sides of heat exchange container is also each A heat exchanging fluid interlayer cavity is provided with, more are provided with and communicated between two heat exchanging fluid interlayer cavitys and is arranged at intervals side by side Fluid heat transfer pipeline, two heat exchanging fluid interlayer cavitys each outwards pass through pipeline communication to heat exchanging fluid cooling device.

9. the hot sand preparing system of lost foam casting as claimed in claim 8, it is characterised in that the dust-collecting and heat exchanging pipeline is to incline Tiltedly arrangement, and direction diagonally downward is consistent with the distinguished and admirable flow direction inside pipeline.

10. the hot sand preparing system of lost foam casting as claimed in claim 9, it is characterised in that the dust-collecting and heat exchanging pipeline and Fluid heat transfer pipeline external surface is each arranged at intervals with aluminum fin-stock.