CN210107933U - Heat pipe type three-cylinder vacuum dryer - Google Patents

Abstract

The utility model discloses three vacuum drying-machines of heat pipe formula includes vacuum drying storehouse, raceway, gear circle, three way connection device, discharge apparatus, vacuum unit, elbow device, support, riding wheel, drive arrangement. The heat pipe three-cylinder drying bin comprises a heating device, three drying bins and a helical blade. The heat energy carried by the medium conducts heat to the materials in the three drying bins through the heating device; the heat dissipation area of the heater with the heating strips is increased by 8-35 times, the heater with the heating strips conducts heat energy for the heat-conducting working medium, the heat-conducting working medium conducts heat-conducting heat exchange of liquid-vapor phase change in the inner cavity of the pipe, the heat energy is conducted through the heating pipe to the materials in the roller to conduct heat and heat, and the vacuum unit pumps and exhausts air in the three-cylinder drying bin and moisture generated during drying of the materials. The heating device in the three-cylinder drying bin still stirs materials during material drying, the material drying quality in the three-cylinder drying bin is uniform, the material drying efficiency is improved, and the material drying effect is optimized.

Description

Heat pipe type three-cylinder vacuum dryer

Technical Field

The utility model relates to a three vacuum drying-machines, specifically a three vacuum drying-machines of heat pipe formula.

Background

The heating bin is additionally arranged on the outer surface of the vacuum drying bin of a three-cylinder vacuum dryer in the existing market, the heating groove conducts heat to the cylinder body of the vacuum drying bin, the conversion efficiency of heat energy on the cylinder body to conduct heat to materials is low, the heat energy loss is large, and the heat conduction speed of the heat energy is low due to the small heat conduction area of the cylinder body; the three-cylinder vacuum dryer with the heating groove has the advantages of complex structure, high manufacturing cost and high maintenance cost.

The vacuum drying bin of the existing vacuum drying machine on the market is provided with hundreds of heat dissipation vertical pipes, the welding processing index requirements of the welding connection part of one end of the hundreds of heat dissipation vertical pipes and the inner wall body are very standard, but the welding quality problem is still easily exposed, as long as one welding quality problem exists in one end of the hundreds of heat dissipation vertical pipes and the welding point of the drying bin body, the leakage of the heat conduction working medium can be generated only by one leakage point, the leakage maintenance is also very troublesome, and finally the whole vacuum drying machine is disabled and can not be used.

The heating pipe that the vacuum drying storehouse of the three vacuum drying-machines of new type on the existing market used is the gravity heating pipe, and when the gravity heating pipe was vertical placing, the evaporation zone of heating pipe was at condensation section down last, and heat energy only can carry out the heat conduction heating through the face of the hot plate of heating pipe lower extreme. The heat conducting area of the plate surface of the heating plate of the lower end pipe head of the heating pipe is limited, the heating plate with small heat exchange area only inputs a small amount of heat, the heat conducting working medium influences the heat conducting heating of the heat conducting working medium in the pipe cavity due to the limited heating area, the total heated heat energy of the heat conducting working medium is insufficient, the heating pipe cannot output a large amount of heat energy, the material cannot obtain enough heat energy, and the material drying efficiency of the vacuum drying bin is influenced.

Disclosure of Invention

The to-be-solved problem of the utility model is to overcome the not enough of prior art existence, provide a three vacuum drying-machines of heat pipe formula.

In order to reach the purpose, the utility model discloses a following technical scheme realizes: the heat pipe type three-cylinder vacuum dryer comprises a vacuum drying bin, a roller path, a gear ring, a three-way joint device, a discharging device, a vacuum unit, an elbow device, a support, a riding wheel and a driving device.

The outer diameter of the vacuum drying bin is 1800-3800 mm; the length of the vacuum drying bin is 2600-12000 mm.

The vacuum drying bin comprises a heating device, three drying bins and a helical blade; the heating device is arranged in the three drying bins.

The three-cylinder drying bin comprises an outer cylinder drying bin, a middle cylinder drying bin and an inner cylinder drying bin.

The outer cylinder drying bin, the middle cylinder drying bin and the outer cylinder drying bin of the inner cylinder drying bin are made of metal plates, the thickness of each metal plate is 2-12 mm, and the metal plates are rolled, welded and processed into the outer cylinder drying bin, the middle cylinder drying bin and the inner cylinder drying bin. The structural design and the manufacturing combination of the three-cylinder drying bin are the same as those of an outer cylinder drying bin, a middle cylinder drying bin and an inner cylinder drying bin which are connected in a combined manner in the current market.

The vacuum drying bin is provided with a bin inlet and a bin outlet. The inner cylinder drying bin at one end of the three cylinder drying bins of the vacuum drying bin is provided with a bin inlet, and the outer cylinder drying bin at the other end of the three cylinder drying bins is provided with a bin outlet.

The heating device and the helical blades are arranged in the outer cylinder drying bin, the heating device and the helical blades are arranged in the middle cylinder drying bin, and the heating device and the helical blades are arranged in the inner cylinder drying bin. Helical blade and urceolus drying storehouse, well section of thick bamboo drying storehouse, the barrel fixed fixation in inner tube drying storehouse is integrative.

The diameter of the heating device is 400-3500 mm, and the length is 3500-32000 mm. The heating device is spring-like in appearance.

The heating device comprises a heating pipe, a heat conduction pipe and a fixing strip.

The heat conduction pipe is made of metal, the heat conduction pipe is made through processing of the pipe bender, the heat conduction pipe is arranged in a spiral shape, and the appearance of the rolled heat conduction pipe is similar to that of a spring. The heat conduction pipe is provided with a heat energy inlet and a heat energy outlet; the diameter of the heat conducting pipe is 48-128 mm, and the length is 5000-58000 mm; the length of the heat conduction pipe is set according to the actual requirement of the three-cylinder drying bin.

The lengths of the heating pipes arranged on the heat conduction pipes of the heating device are different. The circumference of heliciform heat pipe is long, selects the heating pipe of installing different length on the heat pipe, and the heating pipe of length cross arrangement is convenient for improve the heating pipe installation quantity on the heat pipe, and the heating pipe of length cross arrangement has improved the heat conduction heat transfer area of heating device's heat energy.

The lower end of the heating pipe is fixed on the heat conduction pipe; the heating pipe stands on the heat conduction pipe, and the lower end face of the heating pipe is attached and fixed on the heat conduction pipe. The heating pipe is a single one which is fixedly welded outside the heat conducting pipe; the distance between each heating pipe and the adjacent heating pipe is 60-180 mm, and the heating pipes with the required number can be welded and fixed on the heat conduction pipes.

The interior of the heating pipe is not communicated with the interior of the heat conducting pipe; when one heating pipe is damaged and leaks, only the heating pipe does not work, and the use of the integral three-cylinder drying bin is not influenced.

The heating pipes are fixedly connected with the adjacent heating pipes by the fixing strips, the firmness of the heating pipes supported by the fixing strips can be improved, and the heating pipes are prevented from falling down and tilting under the flowing extrusion of materials in the bin; the fixing strip is a 2-5 mm steel bar.

The diameter of the heating pipe is 38-118 mm, and the length is 300-1500 mm.

The first heating device is arranged in the outer cylinder drying bin, a first heat energy inlet of a heat conduction pipe of the first heating device extends out of a bin outlet of the outer cylinder drying bin, the first heat energy inlet of the heat conduction pipe extending out of the bin outlet of the outer cylinder drying bin of the three cylinder drying bins is connected to a heat energy guide pipe through a rotary joint, and the heat energy guide pipe is connected to an external heating heat source; the heat conduction pipes extending out of the bin inlets of the three drying bins do not influence the passing of materials. The outside of the heat conducting pipe of the first heating device is attached to the barrel body of the outer barrel drying bin, the heat conducting pipe supports the barrel body of the outer barrel drying bin, the invagination deformation of the barrel body of the outer barrel drying bin caused by vacuum negative pressure of air pressure in the three barrel drying bins is avoided, and the heat conducting pipe body improves the folding strength of the barrel body of the outer barrel drying bin. The cylinder body of the outer cylinder drying bin is supported by the heat conduction pipe, so that the pressure resistance is improved, and the thickness of the selected metal plate is reduced when the cylinder body of the outer cylinder drying bin is manufactured.

The second heating device is arranged in the middle barrel drying bin, and a second heat energy inlet of a heat conduction pipe of the second heating device is connected to a first heat energy outlet of a heat conduction pipe of the first heating device in the outer barrel drying bin.

The third heating device is arranged in the inner cylinder drying bin, a third heat energy inlet of a heat conduction pipe of the third heating device is connected to a second heat energy outlet of a heat conduction pipe of the second heating device in the middle cylinder drying bin, a third heat energy outlet of the heat conduction pipe of the third heating device extends out of a bin inlet of the inner cylinder drying bin, a third heat energy outlet of the heat conduction pipe extending out of the bin inlet of the inner cylinder drying bin of the three cylinder drying bin is connected to a heat energy guide pipe through a rotary joint, and the heat energy guide pipe is connected to an external heating heat source; the heat conduction pipes extending out of the bin outlets of the three drying bins do not influence the passing of materials.

The three-cylinder drying bin is structurally designed, manufactured, combined and connected with an outer cylinder drying bin, a middle cylinder drying bin and an inner cylinder drying bin in the existing market, and the combination and the manufacture of the three-cylinder drying bin are the same. The outer cylinder drying bin, the middle cylinder drying bin and the inner cylinder drying bin which are provided with the heating device 4 and the helical blades are combined into a three-cylinder drying bin. The inner cylinder drying bin is arranged inside the middle cylinder drying bin, and the middle cylinder drying bin is arranged outside the outer cylinder drying bin; the drying device comprises three concentric outer cylinder drying bins, a middle cylinder drying bin and an inner cylinder drying bin which are different in diameter and are mutually embedded and fixedly combined according to a certain mathematical relationship and a certain structural form.

The inner parts of the outer barrel drying bin, the middle barrel drying bin and the inner barrel drying bin of the three barrel drying bins are communicated. The material enters the three-cylinder drying bin through the bin inlet of the three-cylinder drying bin, and the material moves forwards from the bin inlet of the inner cylinder drying bin to the bin outlet of the outer cylinder drying bin under the forward propelling action of the spiral blades and the spiral heat conduction pipe of the heating device.

The outer cylinder drying bin, the middle cylinder drying bin and the heat conduction pipes of the heating devices in the inner cylinder drying bin are sequentially connected into a whole; the inner parts of the heat conduction pipes of the outer cylinder drying bin, the middle cylinder drying bin, the first heating device, the second heating device and the third heating device in the inner cylinder drying bin are communicated. After the medium is heated by the external heating source, the medium carrying heat energy enters the heat conduction pipe of the heating device through the heat energy inlet of the heat conduction pipe at the outlet of the three-cylinder drying bin. The medium used in the heat conducting pipe of the heating device is heat conducting oil or water. The heat energy carried by the medium in the heat conduction pipe conducts heat conduction and heats materials in the three drying bins through the heating device, the radiated medium flows out through a heat energy outlet of the heat conduction pipe at the bin inlet of the three drying bins, the radiated medium is heated again through the external heating source, and the medium conducts heat and radiates heat in a circulating heating mode between the heating source and the heating device.

The gear ring and the raceway are installed on the outer surface of the barrel of the vacuum drying bin, and the gear ring and the raceway are fixedly connected with the barrel of the outer barrel drying bin of the vacuum drying bin into a whole.

The riding wheel is fixedly arranged on the ground, and supports the roller path of the vacuum drying bin.

The driving device is an electric motor or a hydraulic motor. In order to improve the efficiency of the driving device, the driving device can be matched with a gearbox, therefore, the driving device can also be an electric motor and the gearbox, or a hydraulic motor and the gearbox.

The driving wheel of the driving device is meshed with and drives the gear teeth of a gear ring on the fixed vacuum drying bin, and the gear ring drives the vacuum drying bin; the vacuum drying bin is driven by the driving device to rotate on the riding wheel.

The three-way joint device comprises a three-way pipe, a flange joint and a dynamic sealing device; the three-way pipe is provided with a discharge hole, a feed inlet and an exhaust port.

The dynamic sealing device is fixed on the outer surface of the pipe head at the discharge port end of the three-way pipe; the flange joint is fixedly and hermetically connected with the pipe head at the discharge port end of the three-way pipe through a dynamic sealing device.

The dynamic sealing device is a mature product: 1. the dynamic sealing device mainly comprises a dynamic ring and a static ring, certain sealing precision is provided between the abutting end faces of the dynamic ring and the static ring, and the dynamic ring and the static ring can rotate relatively to form mechanical dynamic sealing. 2. The dynamic sealing device is a magnetic fluid sealing device, and the magnetic fluid sealing of the magnetic fluid sealing device utilizes the response characteristic of the magnetic fluid to a magnetic field. The magnetic liquid is injected into a magnetic conduction loop formed by a high-performance permanent magnet, a pole shoe with good magnetic conduction and a shaft to form a plurality of liquid O-shaped rings. When the magnetic fluid is under the action of pressure difference, the magnetic fluid can move in the non-uniform magnetic field, and at the moment, the non-uniform magnetic field can make the magnetic fluid produce magnetic force resisting the pressure difference so as to achieve new balance, so that the sealing effect can be achieved.

The flange joint of the three-way joint device is fixedly and hermetically connected with the bin inlet of the vacuum drying bin into a whole; when the bin inlet of the vacuum drying bin rotates, the flange joint synchronously rotates along with the vacuum drying bin, and the three-way pipe is fixed; a dynamic seal with airtight seal is arranged between the flange joint and the pipe head of the discharge hole of the three-way pipe; the discharge port of the three-way pipe is fixedly connected with the bin inlet of the vacuum drying bin in an airtight manner.

The three-way pipe of the three-way joint device is fixedly supported by a bracket.

The discharging device is arranged on a feeding hole of the three-way pipe, and materials to be dried enter the vacuum drying bin through the discharging device. The discharging device also prevents air outside the vacuum drying bin from entering the vacuum drying bin through the discharging device while conveying materials.

The discharging device is an air seal machine or a discharging valve.

The vacuum unit is arranged on an exhaust port of a three-way pipe of the three-way joint device through an air duct. Moisture generated in the material drying process in the vacuum drying bin is discharged out of the vacuum drying bin by a vacuum unit; moisture generated in the material drying process in the vacuum drying bin sequentially passes through the exhaust port, and the air guide pipe is discharged out of the drying bin by the vacuum unit.

The vacuum unit comprises a dust filtering device, a condenser and a vacuum pump; or a vacuum pump, a condenser; when the material without dust is dried, the dust filter device is not matched.

The dust in the moisture generated when the air and the materials in the drying bin are dried is filtered by the dust filtering device, and the dust in the moisture is filtered by the dust filtering device, so that the dust in the moisture is prevented from being adhered to the condenser, and the dust adhered to the condenser can influence the work of the condenser; after the condenser condenses the condensable gas of the moisture after filtering the dust into water, the condensed water is discharged out of the condenser by the drain valve, and the condensed gas is pumped out of the vacuum drying bin by the vacuum pump. A small volume of non-condensable gas remains; the power of the vacuum pump can be reduced by pumping the moisture with reduced volume, and the heat energy generated by condensation can be used again, so that the effects of waste heat utilization, energy conservation and emission reduction are achieved. The air pressure in the vacuum drying bin in the drying process sets the vacuum degree corresponding to the vaporization boiling point according to the requirement of the material drying quality.

The elbow device comprises an elbow pipe, a flange joint and a dynamic sealing device.

The elbow pipe is provided with a discharge hole and a feed inlet.

The dynamic sealing device is fixed on the outside of the pipe head at the feed inlet end of the elbow pipe; the flange joint is fixedly and hermetically connected with the pipe head of the feeding hole of the elbow pipe by a dynamic sealing device.

The flange joint of the elbow device is fixedly and hermetically connected with the bin outlet of the vacuum drying bin into a whole; when the outlet of the vacuum drying bin rotates, the flange joint synchronously rotates along with the vacuum drying bin, and the elbow pipe is fixed; the flange joint is hermetically connected with the pipe head of the feeding hole of the elbow pipe by a dynamic sealing device, and the flange joint is hermetically and dynamically sealed; the inlet of the elbow pipe is fixedly connected with the outlet of the vacuum drying bin without air leakage.

The elbow pipe of the elbow device is supported and fixed by a bracket.

The discharging device is arranged on a discharging port of an elbow pipe of the elbow device, and the dried material in the vacuum drying bin is discharged out of the vacuum drying bin through the elbow device and the discharging device in sequence; the discharging device also prevents air outside the vacuum drying bin from entering the vacuum drying bin through the discharging device while conveying materials.

The heating pipe comprises a metal pipe, a heat conducting working medium and a heating end socket.

The metal pipe is a metal pipe with one closed end; the metal tube is a light tube or a finned metal tube.

The unsealed end of the metal tube and the heating end enclosure are fixedly welded into a whole, and the inner cavity of the tube after the metal tube and the heating end enclosure are welded and fixed is in a sealed airtight vacuum state; the heat conducting working medium is arranged in the vacuum pipe inner cavity after the metal pipe and the heating end socket are welded and fixed, and the heat conducting working medium conducts heat conducting and heat exchanging of liquid-vapor phase change in the pipe inner cavity after the metal pipe and the heating end socket are welded and fixed.

The heat conducting working medium is water, ethanol, a composite working medium or other working media suitable for use.

The diameter of the heating end socket is 35-98 mm, and the height is 38-580 mm.

The heating end socket comprises a heating plate, a heat-conducting medium and a heater.

The heat-conducting medium is water, ethanol, a composite medium or other suitable medium.

The heating plate is made of a 0.1-3 mm metal plate, and the metal plate is made into the heating plate through stamping of a stamping machine. The shape and size of the concave shape of the heating plate are equal to or larger than the shape and size of the periphery of the heat conduction pipe, and the shape and size of the concave shape of the heating plate are the same as the shape and size of the periphery of the heat conduction pipe.

The heating strip is arranged on the heater, and the heating strip and the heater are integrated. And manufacturing the heater mold according to the requirements of the specification, the shape and the size of the required heater. The heater is formed by directly punching a metal plate into a suitable heater by a punch through a heater die; the thickness of the metal plate is 0.1-1 mm.

The heating strip is hollow, and a hollow cavity is formed inside the heating strip; the convex appearance of the heating strip is conical.

The lower end of the heater is fixed on the heating plate, a cavity between the heater and the heating plate after fixed connection is in a sealed airtight vacuum state, and a heat-conducting medium is in the cavity between the heater and the heating plate. The inner cavity of the heating strip and the cavity between the heater and the heating plate are in communication. The heat conducting medium conducts heat conduction and heat exchange of liquid-vapor phase change in a cavity between the heater of the heating end socket and the heating plate.

The lower end of the heating pipe is fixed on the outside of the heat conducting pipe. Through electric welding, weld the junction of the heating head of heating pipe lower extreme and the body of heat pipe and fix, the lower extreme and the heat pipe of heating pipe are as an organic whole along fixed connection.

The heat energy inlet of the heat conduction pipe of the heating device extends out of the elbow pipe of the elbow device on the outlet of the vacuum drying bin, the joint of the heat conduction pipe of the heat energy inlet and the elbow pipe is fixedly and hermetically connected by a dynamic sealing device, when the outlet of the vacuum drying bin rotates, the heat conduction pipe synchronously rotates along with the vacuum drying bin, and the elbow pipe is fixed; the heat conduction pipe of the heat energy inlet and the elbow pipe are hermetically sealed and airtight, and the joint of the heat conduction pipe of the heat energy inlet and the elbow pipe is airtight; the heat conduction pipe and the barrel body of the roller at the outlet of the vacuum drying bin are supported and fixed by the support frame, and the support frame improves the fixation and the non-shaking of the heat conduction pipe; the heat energy inlet of the heat conducting pipe is connected to an external heat source through a guide pipe, the guide pipe is provided with a circulating pump, and the circulating pump can improve the circulating flow speed of the heat conducting medium in the guide pipe and the heat conducting pipe, so that the heat conducting speed is increased. The heat energy inlet of the heat conducting pipe is fixedly connected with the guide pipe through a rotary joint. The pipe is fixed when the heat conducting pipe rotates, and the joint between the heat conducting pipe and the pipe connected by the rotary joint does not leak.

The heat energy outlet of the heat conduction pipe extends out of a three-way pipe of a three-way joint device arranged on the bin inlet of the inner cylinder drying bin of the vacuum drying bin, and the joint of the heat conduction pipe and the three-way pipe is fixedly and hermetically connected by a dynamic sealing device. When the bin inlet of the inner cylinder drying bin of the vacuum drying bin rotates, the heat conduction pipe synchronously rotates along with the vacuum drying bin, and the three-way pipe is fixed; the heat conducting pipe and the three-way pipe are sealed airtight dynamic seal, and the joint of the heat conducting pipe and the three-way pipe is airtight. The heat conduction pipe and the barrel body of the inner barrel drying bin at the bin inlet of the vacuum drying bin are supported and fixed by the support frame, and the support frame improves the fixation of the heat conduction pipe and prevents the heat conduction pipe from shaking; the heat energy outlet of the heat conducting pipe is connected with an external heat source through a conduit. The heat energy outlet of the heat conducting pipe is fixedly connected with the conduit by a rotary joint. The pipe is fixed when the heat conducting pipe rotates, and the joint between the heat conducting pipe and the pipe connected by the rotary joint does not leak.

The medium used in the heat conducting pipe in the heating device is not marked and shown in the attached drawings; the medium is water, or air, or heat conducting oil, or other suitable medium.

The heat source of the external device is a boiler, or a heat pump, or a burner, or a combustion furnace.

After the medium is heated by an external heat source, the medium carries heat energy to enter a heat conduction pipe of the heating device; the heat energy carried by the medium in the heat conduction pipe conducts heat for the heating plate of the heating end enclosure through the pipe body of the heat conduction pipe, the heat energy conducted on the heating plate conducts heat for the heat conduction medium in the cavity between the heater of the heating end enclosure and the heating plate, and the heat conduction medium conducts heat conduction and heat exchange of liquid-vapor phase change inside the cavity between the heater and the heating plate. The hollow heating strip is convenient for the heat conducting medium to conduct heat energy at the hollow part of the heating strip, the vaporized gaseous heat conducting medium is filled in the cavity between the heater and the heating plate, and the heat energy carried by the heat conducting medium is conducted out through the heating strip.

Under the condition of the space volume of the inner cavity of the heating pipe with the same size, the heat conduction and heat exchange area of the heater with the heating strips is 8-35 times larger than that of the heating plate; the heater with the heating strips enlarges the heat dissipation area of heat energy, realizes that the heating plate of the heating end socket with small area can input enough heat energy, the heater with large area heat conduction and heat exchange of the heating end socket can output a large amount of heat energy, the heat energy conducted on the heater of the heating end socket can conduct heat conduction and heating for the heat conduction working medium in the pipe cavity, the heat conduction working medium in the pipe cavity is scattered around the heating strips on the heater, and the heating speed of the heat conduction working medium in the pipe cavity of the heating pipe is improved.

The liquid heat-conducting working medium in the tube cavity of the heating tube is vaporized after being heated by the heat conduction of the heat energy on the heater, the vaporized gas heat-conducting working medium moves in the tube cavity, after the gaseous heat-conducting working medium conducts heat outwards and dissipates heat through the metal pipe, the gaseous working medium is condensed into the liquid heat-conducting working medium, the condensed liquid heat-conducting working medium drops to the periphery of the heating strip on the heater by means of the gravity of the condensed liquid heat-conducting working medium and is heated and vaporized again, the heater conducting heat in large area supplies heat energy to the heat-conducting working medium, the heating device of the small area heating plate can conduct heat energy to the heat-conducting working medium in the inner cavity of the pipe, the heat-conducting working medium conducts heat conduction and heat exchange of 'liquid-vapor phase change' in the inner cavity of the pipe, the vaporized gaseous heat-conducting working medium is filled in the, the heat energy carried by the heat-conducting working medium is conducted to the material outside the metal pipe through the metal pipe to conduct heat and heat. The metal tube can output a large amount of heat, the heat energy is conducted to the materials piled around the heating device, and the materials in the three-cylinder drying bin can be dried after obtaining the heat energy.

The boiling point temperature of the heat-conducting medium in the heating end socket is higher than that of the heat-conducting working medium in the heating pipe. And a heat-conducting medium with a higher boiling point is selected in the heating end socket, and a heat-conducting working medium with a lower boiling point is selected in the heating pipe. The high-temperature heat energy conducted by the heating end socket is convenient for conducting heat conduction and heating for the heat conduction working medium in the pipe inner cavity with low boiling point, and the vaporization heat conduction speed of the heat conduction working medium in the pipe inner cavity is increased.

The heating device is arranged inside the three-cylinder drying bin, the three-cylinder drying bin rotates in the process of drying materials, and the heating device synchronously rotates along with the three-cylinder drying bin. The lower end of a heating pipe of the heating device continuously changes the upper position and the lower position along with the rotation of the three drying bins, and a heating end socket of the heating pipe continuously changes the upper position and the lower position. When some heating pipes are arranged above the three drying bins, heating end sockets of the heating pipes are arranged above the three drying bins, and when the heating end sockets of some heating pipes are arranged below the three drying bins, the heating end sockets of the heating pipes are arranged below the three drying bins downwards. Due to the working principle of the gravity heat pipe, when the heating end enclosure of the heating pipe faces downwards and is positioned below the three-cylinder drying bin, after the heat-conducting working medium in the pipe cavity of the heating pipe flows to the heating end enclosure below the heating pipe, the heat energy in the heat-conducting pipe conducts heat for the heating end enclosure of the heating pipe, and the heater of the heating end enclosure conducts heat for the heat-conducting working medium in the pipe cavity.

When the material is in a constant-speed drying section and the moisture in the material is less than the critical moisture content, high-temperature heat energy is needed to improve the drying speed; the material in the three-cylinder drying bin at the outlet end of the bin is heated and dried by heat energy for a while, and the heat energy with higher temperature is needed for drying. The medium heated by the external heating source is a high-temperature medium, the heat energy carried by the high-temperature medium directly provides the fastest and most effective heat energy for drying the materials in the three drying bins at the bin outlet end, and the temperature of the heat-dissipated medium is reduced after the heat energy reaches the three drying bins at the bin inlet end, so that the high-humidity materials to be dried can be heated and dried. On the contrary, the heat energy inlet of the heat conducting pipe of the heating device is arranged at the bin inlet of the three-cylinder drying bin and enters the three-cylinder drying bin, the heat energy carried by the medium is conducted on the material in the three-cylinder drying bin at the bin outlet end, the temperature of the heat-dissipated medium is reduced after the heat energy reaches the three-cylinder drying bin at the bin outlet end, the heat energy provided for drying the material in the three-cylinder drying bin at the bin outlet end is limited and insufficient, and the drying efficiency of the material is reduced.

When the moisture in the material is less than the critical moisture content, the drying speed of the material is improved by the medium carrying high-temperature heat energy, and the heat energy inlet of the heat conduction pipe of the heating device enters the three-cylinder drying bin at the bin outlet of the three-cylinder drying bin, so that the optimal choice for improving the drying speed is provided.

Heat energy generated by an external heat source directly enters the interior of the heating device of the vacuum drying bin for heat conduction and heat exchange, and the heat energy can conduct heat for materials without secondary heat conduction and heat exchange, so that the effective utilization rate of the heat energy is improved. The heating bin or the heating groove does not need to be additionally arranged outside the vacuum drying bin, the vacuum drying bin is simple in structure and low in manufacturing cost, and the utilization rate of the drying field is further improved.

The working flow of the heat conduction heating of the heating device of the vacuum drying bin is as follows: the heat energy carried by the medium in the heat conducting pipe of the heating device conducts heat for the heating end enclosure through the pipe body of the heat conducting pipe, the liquid heat conducting working medium in the pipe cavity of the heating pipe is vaporized after the heat conducting heating of the heat energy on the heating end enclosure heater, and the heat energy carried by the heat conducting working medium conducts heat for the material outside the pipe of the metal pipe through the metal pipe.

After the medium is heated by an external heating source, the medium carrying heat energy sequentially enters an outer cylinder drying bin, a middle cylinder drying bin and a heat conduction pipe of a heating device in an inner cylinder drying bin through a heat energy inlet of a heat conduction pipe. The medium used in the heat conduction pipe is heat conduction oil or water.

And secondly, heat energy carried by the medium in the heat conduction pipe is conducted and heated to the heating end socket of the heating pipe through heat conduction of the pipe body of the heat conduction pipe, the heat energy conducted on the heating plate is conducted and heated to the heat conduction medium in the cavity between the heater and the heating plate, and the heat conduction medium conducts heat conduction and heat exchange of liquid-vapor phase change in the cavity between the heater and the heating plate. The heat energy conducted on the heater conducts heat to the heat-conducting working medium in the tube cavity, and the heat energy carried by the heat-conducting medium provides heat energy to the liquid heat-conducting working medium in the tube cavity of the heating tube through the heating end socket.

Thirdly, the liquid heat-conducting working medium is quickly gasified by heat conducted by a heater of the heating end socket, the gasified heat-conducting working medium moves in the inner cavity of the heating pipe, the gasified heat-conducting working medium conducts heat outwards through the pipe body and the fins of the metal pipe and dissipates heat, the gasified heat-conducting working medium is condensed into the liquid heat-conducting working medium, the condensed liquid heat-conducting working medium flows to the heating head of the heating pipe and is gasified again after being heated, and the heat-conducting working medium conducts heat conduction and heat exchange in the inner cavity of the pipe through liquid-vapor phase change.

And fourthly, conducting heat energy carried by the heat conducting working medium to the materials around the heating device through conduction of the metal pipe and the fins to conduct heat conduction and heating, drying the materials to achieve the required water content standard.

And fifthly, the heat-conducting and heat-dissipating medium is discharged from the heat-conducting pipe through a heat-conducting pipe heat outlet of the heating device in the inner-cylinder drying bin, and enters the heat-conducting pipe through a heat-conducting pipe heat inlet after being reheated by an external heating source, so that the heat-conducting medium circularly conducts heat, exchanges heat and heats repeatedly.

The vacuum conduction drying energy consumption index of the heat pipe type three-cylinder vacuum dryer is 2800-3500 kj/kg water, and the air convection drying is 5500-8500 kj/kg water; the effective utilization rate of heat energy of the air convection drying is generally 20-50%, while the vacuum conduction drying can be close to 100% theoretically, because the vacuum conduction drying of the roller vacuum dryer does not need hot air to heat materials, and the heat loss lost by exhaust is small. In the constant-speed drying section, the boiling point of water is reduced due to vacuum or decompression, the temperature rise of the material is extremely small, the heat is almost completely used for evaporating water, and if the heat is close to or less than the critical water content, the energy-saving advantage of vacuum conduction drying of the heat pipe type three-cylinder vacuum dryer is higher.

The working process of drying the materials of the heat pipe type three-cylinder vacuum dryer is as follows:

firstly, starting a driving device, and enabling a vacuum drying bin to rotate on a riding wheel under the driving of the driving device; the rotation speed of the vacuum drying chamber controlled by the driving device is 1-8 r/min.

Secondly, start discharge apparatus, wait that dry material loops through discharge apparatus, three-way connection device's three-way pipe, the storehouse mouth that advances of the dry storehouse of inner tube of three dry storehouses enters into the storehouse of three dry storehouses inside, and the material impels forward under helical blade and heating device's stirring pushing action, and the material advances to the delivery port department flow of the dry storehouse of the outer tube of three dry storehouses by the storehouse mouth that advances of the dry storehouse of inner tube of three dry storehouses.

Thirdly, after the medium is heated by an external heat source, the heat energy carried by the medium is used for conducting heat conduction and heating for the materials in the three drying bins through the heating device, the heating pipe of the rotating heating device conducts heat conduction and heating for the materials, the materials in the three drying bins are heated by the heat energy, and the materials reach the required water content standard after being dried and dried. The heating device has the advantages that the heat conducting pipe and the heating pipe can conduct heat and heat to materials, and meanwhile, the effects of pushing the materials forward and stirring the materials in the drying process of the materials can be achieved. The heating pipe with high rotating cross density increases the collision contact rate with the material and the heat conducting area, and increases the heat conducting and drying effect on the material.

Fourthly, starting a vacuum unit, and pumping air in the three-cylinder drying bin and moisture generated during material drying by the vacuum unit; dust in the moisture that produces when the material is dry in the vacuum drying storehouse passes through dust filter equipment's filtration treatment, and the condenser carries out the condensation processing with the moisture after filtering the dust, and the comdenstion water is discharged the condenser by the drain valve, and the gas after the condensation is discharged the vacuum drying storehouse by the vacuum pump. The relative pressure in the three drying chambers is kept between-0.095 and-0.045 Mpa.

And fifthly, discharging the dried materials under the rotating and pushing action of the helical blades, wherein the dried materials sequentially pass through an elbow pipe of an elbow device on a bin outlet of the three-cylinder drying bin, and discharging the dried materials out of the three-cylinder drying bin by using a discharging device.

The utility model discloses compare with current three vacuum drying-machines and have following beneficial effect: the vacuum drying bin of the heat pipe type roller vacuum dryer is driven by the driving device to rotate on the riding wheel, and heat energy carried by the medium conducts heat and heats materials in the three drying bins through a heat conduction pipe and a heating pipe of the heating device; the heat dissipation area of the heater with the heating strips is increased by 8-35 times, the heater conducts heat energy to the heat-conducting working medium, the heat-conducting working medium conducts heat-conducting heat exchange of 'liquid-vapor phase change' in the inner cavity of the pipe, and the heat energy is conducted to materials in the three-cylinder drying bin through the heating pipe to conduct heat-conducting heating; when one heating pipe is damaged and leaks, the use of the whole three-cylinder drying bin is not influenced. The materials are in a constant-speed drying section, and a vacuum unit pumps air in a vacuum drying bin and moisture generated during drying of the materials; the energy saving advantage of the vacuum conduction drying of the heat pipe type three-cylinder vacuum dryer is greater because the boiling point of water is reduced by vacuum or decompression. The heating device in the three-cylinder drying bin still stirs materials during material drying, the material drying quality in the three-cylinder drying bin is uniform, the material drying efficiency is improved, and the material drying effect is optimized.

Description of the drawings:

fig. 1 is a schematic structural view of the heat pipe type three-cylinder vacuum dryer of the present invention;

fig. 2 is a schematic structural view of a three-way joint device of the heat pipe type three-cylinder vacuum dryer of the present invention;

fig. 3 is a schematic structural view of an elbow device of the heat pipe type three-cylinder vacuum dryer of the present invention;

fig. 4 is a schematic structural view of a vacuum drying chamber of the heat pipe type three-cylinder vacuum dryer of the present invention;

FIG. 5 is a schematic structural view of a cross section of a vacuum drying chamber of the heat pipe type three-cylinder vacuum dryer of the present invention;

fig. 6 is a schematic structural view of a heat pipe of a heating device of a vacuum drying chamber of the heat pipe type three-cylinder vacuum dryer of the present invention;

FIG. 7 is a schematic structural view of an outer cylinder drying chamber of a vacuum drying chamber of the heat pipe type three-cylinder vacuum dryer of the present invention;

fig. 8 is a schematic structural view of a middle drying bin of a vacuum drying bin of the heat pipe type three-drum vacuum dryer of the present invention;

fig. 9 is a schematic structural view of an inner cylinder drying chamber of a vacuum drying chamber of the heat pipe type three-cylinder vacuum dryer of the present invention;

fig. 10 is a schematic structural view of a heating pipe of the heating device of the vacuum drying chamber of the heat pipe type three-cylinder vacuum dryer of the present invention;

fig. 11 is the schematic structural diagram of the heating head of the heating pipe of the heating device of the vacuum drying bin of the heat pipe type three-cylinder vacuum dryer of the present invention.

In the drawings: 1. vacuum drying bin, 2, three-way joint device, 3, discharging device, 4, vacuum unit, 5, roller path, 6, elbow device, 7, support, 8, riding wheel, 9, driving device, 10, bin inlet, 11, bin outlet, 12, heating device, 13, heat energy inlet, 14, heat energy outlet, 15, heat conducting pipe, 16, material flow direction mark, 17, middle barrel drying bin, 18, inner barrel drying bin, 19, helical blade, 20, flange joint, 21, three-way pipe, 22, discharge port, 23, feed port, 24, exhaust port, 25, dynamic sealing device, 26, drying bin, 27, barrel, 28, outside of barrel, 29, fixing strip, 30, heating pipe, 31, metal pipe, 32, heat conducting working medium, 33, heating end socket, 34, inner cavity of pipe, 35, heater, 36, heating plate, 37, heat conducting medium, 38, heating strip, 39, gear ring, 40. an elbow pipe.

The specific implementation mode is as follows:

the present invention will be further described with reference to the accompanying drawings and examples.

Example (b):

referring to fig. 1, 2, 3, 4, 7, 8 and 9, the heat pipe type three-cylinder vacuum dryer comprises a vacuum drying bin 1, a roller path 5, a gear ring 39, a three-way joint device 2, a discharging device 3, a vacuum unit 4, an elbow device 6, a support 7, a riding wheel 8 and a driving device 9.

The outer diameter of the vacuum drying bin 1 is 2800mm, and the length is 8000 mm.

The vacuum drying bin 1 comprises a heating device 12, three drying bins and a helical blade 19; the heating device 12 is arranged in the three-cylinder drying cabin.

The three-cylinder drying bin comprises an outer cylinder drying bin 26, a middle cylinder drying bin 17 and an inner cylinder drying bin 18.

The vacuum drying bin 1 is provided with a bin inlet 10 and a bin outlet 11.

The heating device 12 and the helical blade 19 are arranged in an outer cylinder drying bin 26 of the three cylinder drying bins, the heating device 12 and the helical blade 19 are arranged in a middle cylinder drying bin 17, and the heating device 12 and the helical blade 19 are arranged in an inner cylinder drying bin 18; the helical blade 19 is fixedly integrated with an outer cylinder drying bin 26, a middle cylinder drying bin 17 and a cylinder body 27 of an inner cylinder drying bin 18.

The heating device 12 is spring-like in appearance.

As shown in fig. 4, 5, 6, 7, 8, 9, 10 and 11, the heating device 12 includes a heating pipe 30, a heat transfer pipe 15 and a fixing bar 29.

The heat pipe 15 is made of metal, and the appearance of the rolled heat pipe 15 is spring-like. The heat conduction pipe 15 is provided with a heat energy inlet 13 and a heat energy outlet 14, and the length of the heat conduction pipe 15 is set according to the actual requirement of the three-cylinder drying bin.

The heating pipes 30 installed on the heat conduction pipes 15 of the heating device 12 have different lengths.

The lower end of the heating pipe 30 is fixed on the heat conducting pipe 15, and the heating pipe 30 and the adjacent heating pipe 30 are fixedly connected by a fixing strip 29.

The heating tube 30 has a diameter of 38mm and a length of 300-580 mm.

The inner parts of the outer cylinder drying bin 26, the middle cylinder drying bin 17 and the inner cylinder drying bin 18 of the three cylinder drying bins are communicated. The material enters the three-cylinder drying bin through the bin inlet 10 of the three-cylinder drying bin, and the material moves forwards from the bin inlet 10 of the inner cylinder drying bin 18 to the bin outlet 11 of the outer cylinder drying bin 26 under the forward propelling action of the helical blades 19 and the helical heat conduction pipes 15 of the heating device 12.

The outer cylinder drying bin 26, the middle cylinder drying bin 17 and the heat conducting pipes 15 of the heating device 12 in the inner cylinder drying bin 18 are connected into a whole in sequence; the heat pipes 15 of the heating device 12 in the outer cylinder drying chamber 26, the middle cylinder drying chamber 17 and the inner cylinder drying chamber 18 are communicated with each other.

As shown in fig. 1, 4 and 7, the gear ring 39 and the raceway 5 are integrally connected and fixed with the cylinder 27 of the outer cylinder drying bin 26 of the vacuum drying bin 1.

The roller 8 supports and supports the roller path 5 of the vacuum drying bin 1.

The drive means 9 is a hydraulic motor.

The driving wheel of the driving device 9 is meshed with and drives the gear teeth of the gear ring 39 on the fixed vacuum drying bin 1, and the gear ring 39 drives the vacuum drying bin 1; the vacuum drying bin 1 is driven by a driving device 9, and the vacuum drying bin 1 rotates on a riding wheel 8.

The three-way joint device 2 shown in figures 1, 2 and 4 comprises a tee pipe 21, a flange joint 20 and a dynamic sealing device 25; the three-way pipe 21 is provided with a discharge port 22, a feed port 23 and an exhaust port 24.

The dynamic sealing device 25 is fixed on the outer surface of the pipe head at the discharge port 22 end of the three-way pipe 21; the flange joint 20 and the pipe head at the discharge port 22 end of the tee pipe 21 are fixedly and hermetically connected by a dynamic sealing device 25.

The flange joint 20 of the three-way joint device 2 is fixedly and hermetically connected with the bin inlet 10 of the vacuum drying bin 1 into a whole; when the bin inlet 10 of the vacuum drying bin 1 rotates, the flange joint 20 synchronously rotates along with the vacuum drying bin 1, and the three-way pipe 21 is fixed; a dynamic seal which is airtight and sealed is arranged between the flange joint 20 and the head of the discharge hole 22 of the tee 21; the fixed connection of the discharge port 22 of the three-way pipe 21 and the bin inlet 10 of the vacuum drying bin 1 is airtight.

The three-way pipe 21 of the three-way joint device 2 is fixedly supported by the bracket 7.

The discharging device 3 is arranged on the feeding hole 23 of the three-way pipe 21.

The discharging device 3 is a discharging valve; the discharge valve is a high-airtight discharge valve.

The vacuum unit 4 is arranged on an exhaust port 24 of the three-way pipe 21 of the three-way joint device 2 through an air guide pipe.

The vacuum unit 4 comprises a dust filtering device, a condenser and a vacuum pump.

The elbow unit 6 shown in fig. 1, 3 and 4 comprises an elbow pipe 40, a flange joint 20 and a dynamic sealing device 25; the flange joint 20 and the head of the feed inlet 23 of the elbow pipe 40 are fixedly and hermetically connected by a dynamic sealing device 25.

The flange joint 20 of the elbow device 6 is fixedly and hermetically connected with the bin outlet 11 of the vacuum drying bin 1 into a whole; when the bin outlet 11 of the vacuum drying bin 1 rotates, the flange joint 20 synchronously rotates along with the vacuum drying bin 1, and the elbow pipe 40 is fixed; the flange joint 20 is hermetically connected with the head of the feed inlet 23 of the elbow pipe 40 through a dynamic sealing device 25, and the flange joint 20 is hermetically sealed and airtight with the head of the feed inlet 23 of the elbow pipe 40; the fixed connection of the inlet opening 23 of the elbow pipe 40 and the outlet opening 11 of the vacuum drying chamber 1 is airtight.

The elbow pipe 40 of the elbow device 6 is supported and fixed by the bracket 7.

The discharging device 3 is arranged on the discharge port 22 of the elbow pipe 40 of the elbow device 6.

As shown in fig. 4, 5, 6, 10, and 11, the heating pipe 30 includes a metal pipe 31, a heat conducting medium 32, and a heating end enclosure 33.

The metal tube 31 is a metal tube 31 with one closed end; the metal tube 31 is a metal tube having fins on the tube body.

The unclosed end of the metal pipe 31 and the heating end enclosure 33 are fixedly welded into a whole, the heat conducting working medium 32 is arranged in the vacuum pipe inner cavity 34 after the metal pipe 31 and the heating end enclosure 33 are welded and fixed, and the heat conducting working medium 32 conducts heat conducting and heat exchanging of liquid-vapor phase change in the pipe inner cavity 34 after the metal pipe 31 and the heating end enclosure 33 are welded and fixed.

The heat conducting working medium 32 is ethanol.

The heating head 33 shown in fig. 11 includes a heating plate 36, a heat transfer medium 37, and a heater 35.

The heat transfer medium 37 is water.

The heater 35 has a heating strip 38 thereon. The heater 35 is a heater 35 that is formed by directly stamping a metal plate into a suitable shape with a stamping press through a die for the heater 35.

The heating strip 38 is a hollow cavity inside; the convex appearance of the heating strips 38 is conical.

The lower end of the heater 35 is fixed on the heating plate 36, and the heat transfer medium 37 is in the cavity between the heater 35 and the heating plate 36. The interior of the heating strip 38 is in communication with the cavity between the heater 35 and the heating plate 36; the heat conducting medium 37 conducts heat conduction and heat exchange of liquid-vapor phase change in a cavity between the heater 35 and the heating plate 36 of the heating end enclosure 33.

As shown in fig. 10, the lower end of the heating pipe 30 shown in fig. 11 is fixed to the outer surface of the heat transfer pipe 15. The lower end of the heating pipe 30 is fixedly connected with the heat conducting pipe 15 by welding the lower end of the heating pipe 30 and the connecting part of the heating end enclosure 33 and the pipe body of the heat conducting pipe 15.

As shown in fig. 1, fig. 3, fig. 4, and fig. 7, the heat energy inlet 13 of the heat conducting pipe 15 of the heating device 12 extends out of the elbow pipe 40 of the elbow device 6 on the outlet 11 of the vacuum drying chamber 1, and the connection between the heat conducting pipe 15 and the elbow pipe 40 is fixed and sealed by the dynamic sealing device 25.

As shown in fig. 1, fig. 2, fig. 4 and fig. 9, the thermal energy outlet 14 of the heat conducting pipe 15 of the heating device 12 extends out of the three-way pipe 21 of the three-way joint device 2 mounted on the bin inlet 10 of the inner cylinder drying bin 18 of the vacuum drying bin 1, and the connection part of the heat conducting pipe 15 and the three-way pipe 21 is fixedly and hermetically connected by a dynamic sealing device 25.

The boiling point temperature of the heat conducting medium 37 in the heating end socket 33 is higher than that of the heat conducting working medium 32 in the heating pipe 30. The heat-conducting medium 37 with a little higher boiling point is selected in the heating end enclosure 33, and the heat-conducting working medium 32 with a little lower boiling point is selected in the heating pipe 30.

When the moisture in the material is less than the critical moisture content, the drying speed of the material is improved by the medium carrying high-temperature heat energy, and the heat energy inlet 13 of the heat conduction pipe 15 of the heating device 12 enters the three-cylinder drying chamber at the outlet 11 of the three-cylinder drying chamber, so that the optimal choice for improving the drying speed is provided.

The working process of drying the materials of the heat pipe type three-cylinder vacuum dryer is as follows:

firstly, starting a driving device 9, and enabling the vacuum drying bin 1 to rotate on a riding wheel 8 under the driving of the driving device 9; the rotation speed of the vacuum drying chamber 1 controlled by the driving device 9 is 2 revolutions per minute.

Secondly, the discharging device 3 is started, materials sequentially pass through the discharging device 3 and a three-way pipe 21 of the three-way joint device 2 as shown by a material flow direction mark 16 in the figures 1 and 4, a bin inlet 10 of an inner cylinder drying bin 18 of the three-cylinder drying bin enters the bin interior of the three-cylinder drying bin, the materials are pushed forward under the stirring and pushing effects of a helical blade 19 and a heating device 12, and the materials flow from the bin inlet 10 of the inner cylinder drying bin 18 of the three-cylinder drying bin to a bin outlet 11 of an outer cylinder drying bin 26 and move forward.

Thirdly, after the medium is heated by an external heat source, the heat energy carried by the medium conducts heat conduction and heating on the materials in the three-cylinder drying bin through the heating device 12, the heat energy carried by the medium conducts heat conduction and heating on the heat-conducting medium 37 in the heating end enclosure 33 of the heating pipe 30 through the pipe body of the heat-conducting pipe 15 of the heating device 12, and the heat-conducting medium 37 conducts heat conduction and heat exchange of liquid-vapor phase change in a cavity between the heater 35 and the heating plate 36; the liquid heat-conducting working medium 32 in the tube inner cavity 34 of the heating tube 30 is vaporized after being heated by the heat conduction of the heat energy on the heating end socket 33 heater 35, and the heat energy carried by the heat-conducting working medium 32 is conducted to the material outside the metal tube 31 through the metal tube 31 for heat-conducting heating. The heating pipe 30 of the rotary heating device 12 conducts heat conduction and heats the materials, the materials in the three drying bins are heated by heat energy, and the materials reach the required water content standard after being dried and dried. The heat pipe 15 and the heating pipe 30 of the heating device 12 can also perform the functions of pushing and stirring the material forward during the drying operation of the material while heating the material. The cross density is formed between the heating pipe 30 and the heating pipe 30 during rotation, and the heating pipe 30 with high rotation cross density increases the collision contact rate and the heat conduction area with the material, and increases the heat conduction drying effect on the material.

Fourthly, starting the vacuum unit 4, and pumping air in the three-cylinder drying bin and moisture generated during material drying by the vacuum unit 4; dust in the moisture that produces when the material is dry in three dry storehouses passes through dust filter equipment's filtration treatment, and the condenser carries out the condensation processing with the moisture after filtering the dust, and the comdenstion water is discharged the condenser by the drain valve, and the gas after the condensation is discharged three dry storehouses by the vacuum pump. The relative pressure in the three-cylinder drying bin is kept at-0.075 Mpa.

And fifthly, discharging the dried materials under the rotating pushing action of the helical blade 19, wherein the dried materials sequentially pass through the elbow pipe 40 of the elbow device 6 on the bin outlet 11 of the three-cylinder drying bin, and the discharging device 3 discharges the three-cylinder drying bin.

The above embodiments are only used to help understand the manufacturing method and the core idea of the present invention, and the specific implementation is not limited to the above specific implementation, and those skilled in the art can start from the above conception, and the changes made without creative labor all fall within the protection scope of the present invention.

Claims (5)

1. A heat pipe type three-cylinder vacuum dryer comprises a vacuum drying bin (1), a roller path (5), a gear ring (39), a three-way joint device (2), a discharging device (3), a vacuum unit (4), an elbow device (6), a support (7), a riding wheel (8) and a driving device (9); the method is characterized in that: the vacuum drying bin (1) comprises a heating device (12), three drying bins and a helical blade (19); the heating device (12) is arranged in the three drying bins;

a heating device (12) and a helical blade (19) are arranged in an outer cylinder drying bin (26) of the three cylinder drying bins, the heating device (12) and the helical blade (19) are arranged in a middle cylinder drying bin (17), and the heating device (12) and the helical blade (19) are arranged in an inner cylinder drying bin (18);

the heating device (12) comprises a heating pipe (30), a heat conduction pipe (15) and a fixing strip (29); the lower ends of the heating pipes (30) are fixed on the heat conduction pipes (15), and the heating pipes (30) are fixedly connected with the adjacent heating pipes (30) through fixing strips (29);

the inner parts of the heat conducting pipes (15) of the heating device (12) in the outer cylinder drying bin (26), the middle cylinder drying bin (17) and the inner cylinder drying bin (18) are communicated;

the gear ring (39), the roller path (5) and the cylinder body (27) of the outer cylinder drying bin (26) of the vacuum drying bin (1) are connected and fixed into a whole, and the roller path (5) of the vacuum drying bin (1) is supported by the supporting wheel (8);

the three-way joint device (2) comprises a three-way pipe (21), a flange joint (20) and a dynamic sealing device (25); the flange joint (20) is fixedly and hermetically connected with a pipe head at the discharge port (22) end of the three-way pipe (21) through a dynamic sealing device (25); a flange joint (20) of the three-way joint device (2) is fixedly and hermetically connected with a bin inlet (10) of the vacuum drying bin (1) into a whole, and a three-way pipe (21) of the three-way joint device (2) is fixedly supported by a bracket (7);

the discharging device (3) is arranged on a feeding hole (23) of the three-way pipe (21), and the vacuum unit (4) is arranged on an exhaust port (24) of the three-way pipe (21) of the three-way joint device (2) through an air guide pipe;

the elbow device (6) comprises an elbow pipe (40), a flange joint (20) and a dynamic sealing device (25); the flange joint (20) is fixedly and hermetically connected with the head of the feed inlet (23) of the elbow pipe (40) through a dynamic sealing device (25); a flange joint (20) of the elbow device (6) is fixedly and hermetically connected with a bin outlet (11) of the vacuum drying bin (1) into a whole, and the discharging device (3) is arranged on a discharging port (22) of an elbow pipe (40) of the elbow device (6);

the heating pipe (30) comprises a metal pipe (31), a heat conducting working medium (32) and a heating end enclosure (33); the unclosed end of the metal pipe (31) and the heating end enclosure (33) are fixedly welded into a whole, and heat conduction and heat exchange of liquid-vapor phase change are carried out on the heat conduction working medium (32) in a pipe inner cavity (34) formed by fixedly welding the metal pipe (31) and the heating end enclosure (33);

the heating end socket (33) comprises a heating plate (36), a heat-conducting medium (37) and a heater (35); a heating strip (38) is arranged on the heater (35); the lower end of the heater (35) is fixed on the heating plate (36), and the heat-conducting medium (37) is arranged in a cavity between the heater (35) of the heating end enclosure (33) and the heating plate (36);

the boiling point temperature of the heat-conducting medium (37) in the heating end socket (33) is higher than that of the heat-conducting working medium (32) in the heating pipe (30);

a heat energy inlet (13) of a heat conduction pipe (15) of the heating device (12) extends out of an elbow pipe (40) of an elbow device (6) on a bin outlet (11) of the vacuum drying bin (1), and the connection part of the heat conduction pipe (15) and the elbow pipe (40) is fixedly and hermetically connected by a dynamic sealing device (25); a heat energy outlet (14) of a heat pipe (15) of the heating device (12) extends out of a three-way pipe (21) of a three-way joint device (2) arranged on a bin inlet (10) of an inner cylinder drying bin (18) of the vacuum drying bin (1), and the connection part of the heat pipe (15) and the three-way pipe (21) is fixedly and hermetically connected by a dynamic sealing device (25);

starting a driving device (9), enabling a vacuum drying bin (1) to rotate on a riding wheel (8) under the driving of the driving device (9), enabling materials to sequentially pass through a discharging device (3) and a three-way pipe (21) of a three-way joint device (2), enabling a bin inlet (10) of an inner cylinder drying bin (18) to enter the interior of the three-cylinder drying bin, enabling the materials to be forwards pushed under the stirring and pushing effects of a helical blade (19) and a heating device (12), and enabling the materials to flow from the bin inlet (10) of the inner cylinder drying bin (18) of the three-cylinder drying bin to a bin outlet (11) of an outer cylinder drying bin (26) to move forwards;

the heat energy carried by the medium conducts heat to the materials in the three drying bins through the heating device (12): the heat energy carried by the medium conducts heat to a heat-conducting medium (37) in a heating end enclosure (33) of a heating pipe (30) through a pipe body of a heat-conducting pipe (15) of a heating device (12), and the heat-conducting medium (37) conducts heat conduction and heat exchange of 'liquid-vapor phase change' in a cavity between a heater (35) and a heating plate (36); liquid heat-conducting working medium (32) in a pipe inner cavity (34) of the heating pipe (30) is vaporized after heat conduction and heating of heat energy on a heating end socket (33) heater (35), and heat energy carried by the heat-conducting working medium (32) is conducted to materials outside a metal pipe (31) through the metal pipe (31) to conduct heat conduction and heating;

the vacuum unit (4) pumps air in the three-cylinder drying bin and moisture generated during material drying;

the dried materials sequentially pass through an elbow pipe (40) of an elbow device (6) on a bin outlet (11) of the three-cylinder drying bin, and the discharging device (3) discharges the three-cylinder drying bin.

2. The heat pipe type three-cylinder vacuum dryer according to claim 1, wherein: the outer diameter of the vacuum drying bin (1) is 1800-3800 mm, and the length is 2600-12000 mm.

3. The heat pipe type three-cylinder vacuum dryer according to claim 1, wherein: the lengths of the heating pipes (30) mounted on the heat transfer pipes (15) of the heating device (12) are different.

4. The heat pipe type three-cylinder vacuum dryer according to claim 1, wherein: the diameter of the heating tube (30) is 38-118 mm, and the length is 300-1500 mm.

5. The heat pipe type three-cylinder vacuum dryer according to claim 1, wherein: the vacuum unit (4) comprises a dust filtering device, a condenser and a vacuum pump.

Images