Residue-preventing helical ribbon vacuum drying machine

Abstract

The invention relates to the technical field of drying equipment, in particular to an anti-residue helical ribbon vacuum drying machine which comprises a drying machine body, a sliding rod, a spring, a first helical ribbon, an electric push rod, a circular block and the like. The dryer is connected with a sliding rod; a spring is fixedly connected between the sliding rod and the drying machine; the sliding rod is fixedly connected with a first spiral belt. The dryer is connected with at least three electric push rods; the telescopic parts of all the electric push rods are fixedly connected with a circular block together, and the circular block makes contact with the sliding rod. A circular block is driven by an electric push rod to descend, so that a spiral belt is in short-time contact with the conical drying cylinder only when scraping residual materials, abrasion is reduced, the spiral belt can scrape the residual materials on the inner wall of the conical drying cylinder while stirring the materials, the phenomenon that the materials remain on the inner wall of the conical drying cylinder is avoided, and the service life of the conical drying cylinder is prolonged. Residual materials are prevented from being mixed with subsequent other batches of materials, and the material quality is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of drying equipment, and in particular to an anti-residue spiral belt vacuum dryer. Background Art

[0002] The vacuum screw-belt dryer achieves efficient, uniform, and low-temperature drying of materials through the synergistic effect of vacuum environment, heating system, and screw-belt stirring. Its operation process includes loading, stirring, vacuuming, heating and drying, heat preservation and dehumidification, cooling, breaking vacuum, and discharging. It is suitable for the processing of powders and particles and is widely used in chemical, food, pharmaceutical and other industries. The spiral ribbon of the vacuum spiral ribbon dryer usually does not directly contact the inner wall of the drying cylinder. This is to avoid friction damage to the inner wall or spiral ribbon, while reducing equipment wear and energy consumption; however, this design may result in residual materials on the inner wall that cannot be completely scraped off, resulting in residue. Summary of the invention

[0003] In order to overcome the disadvantage that the residual material on the inner wall cannot be completely scraped off and the residual phenomenon occurs, the present invention provides an anti-residue spiral belt vacuum dryer.

[0004] The technical implementation scheme of the present invention is: an anti-residue screw belt vacuum dryer, including a dryer; also including a sliding rod, a spring, a screw belt, an electric push rod, a circular block, and a discharge pipe; the dryer is connected to the sliding rod; a spring is fixedly connected between the sliding rod and the dryer; the sliding rod is fixedly connected to the screw belt; the dryer is connected to at least three electric push rods; all the telescopic parts of the electric push rods are fixedly connected to a circular block, and the circular block is in contact with the sliding rod; the circular block is connected to at least three discharge pipes; and a control valve is provided in each discharge pipe.

[0005] More preferably, the spiral belt is provided with a scraping portion, and the scraping portion contacts the surface of the circular block.

[0006] More preferably, it also includes a connecting block connected to the circular block; the connecting block is fixed with at least six protrusions 1; the protrusion 1 contacts the sliding rod, and at least six protrusions 2 are fixed with the bottom of the sliding rod; the protrusions 1 and the protrusions 2 are staggered.

[0007] More preferably, the circular block is provided with a partition, and the partition is in contact with the outer side of the sliding rod.

[0008] More preferably, it further comprises a material blocking belt fixedly connected to the circular block; the material blocking belt is connected to the dryer, and the material blocking belt is made of high temperature resistant rubber material.

[0009] More preferably, the material blocking belt is in an inverted cone shape after being unfolded.

[0010] More preferably, it further includes a second screw belt fixedly connected to the lower part of the sliding rod; the spiral direction of the second screw belt is opposite to that of the first screw belt, and the second screw belt is located on the inner side of the first screw belt.

[0011] More preferably, it further comprises a plurality of limit blocks connected to the dryer, a protrusion is provided on the upper part of the sliding rod, and the limit block is L-shaped, with its horizontal part located below the protrusion.

[0012] More preferably, a side of the spiral belt away from the sliding rod is made of rubber material.

[0013] More preferably, the rubber portion of the first screw belt is detachably connected to the main body.

[0014] Compared with the prior art, the present invention has the following advantages: The present invention drives the circular block to descend by an electric push rod, so that the spiral belt is in contact with the conical drying cylinder only for a short time when scraping off the residual material, thereby reducing wear. In this way, the spiral belt can stir the material while scraping off the residual material on the inner wall of the conical drying cylinder, avoiding the phenomenon of material residue on the inner wall of the conical drying cylinder and preventing the residual material from mixing with subsequent batches of materials, thereby ensuring the quality of the material.

[0015] By setting the convex block 1 and the convex block 2, the sliding rod and the screw belt 1 are in a shaking state during the rotation process, so that the powder material scraped off by the screw belt 1 falls off quickly, ensuring the cleaning effect of the material.

[0016] During the material drying process, by setting the protrusions one and two, the sliding rod and the screw belt one are in a shaking state when the sliding rod rotates. The shaking of the screw belt one loosens the material to prevent agglomeration, improve heat transfer, reduce residue, and dry evenly, which can significantly improve the drying efficiency and quality.

[0017] When the circular block descends, the blocking belt acts as a barrier to prevent the cleaned material from flowing away from the gap between the circular block and the conical drying cylinder, which is not conducive to collection. The unfolded blocking belt is in an inverted cone shape, which will fit with the screw belt. When the screw belt rotates, the inner side of the blocking belt is cleaned to prevent the falling material from adhering to the blocking belt, resulting in incomplete cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the structure disclosed by the spiral ribbon vacuum dryer for preventing residues of the present invention; Figure 2 A structural cross-sectional view of a conical drying cylinder disclosed in the anti-residue spiral ribbon vacuum drying machine of the present invention; Figure 3 The structure diagram of the conical drying cylinder, the sliding rod, the first spiral belt, the electric push rod, the circular block, the discharge pipe, the material blocking belt and the second spiral belt disclosed by the spiral belt vacuum dryer for preventing residue of the present invention; Figure 4 A structural cross-sectional view of a conical drying cylinder, a sliding rod, a circular block and a material blocking belt disclosed in the anti-residue spiral ribbon vacuum dryer of the present invention; Figure 5 A diagram showing the downward movement of the sliding rod, the spiral belt-circular block and the material blocking belt disclosed in the anti-residue spiral belt vacuum dryer of the present invention; Figure 6 The present invention is a schematic structural diagram of a conical drying cylinder, a motor, a rotating rod, a feeding pipe, a sliding rod, a spiral ribbon and a limit block disclosed in the anti-residue spiral ribbon vacuum dryer of the present invention.

[0019] Among them, the above-mentioned drawings include the following figure marks: 1-conical drying cylinder, 2-motor, 3-rotating rod, 4-feeding pipe, 5-sliding rod, 6-spring, 7-screw belt one, 8-electric push rod, 9-circular block, 10-discharge pipe, 11-heating ring, 12-exhaust pipe, 101-connecting block, 102-bump one, 103-bump two, 121-blocking belt, 211-screw belt two, 221-limiting block, 5001-protrusion, 7001-scraper part, 9001-partitioning part. DETAILED DESCRIPTION

[0020] Although the present invention may be described with respect to a particular application or industry, those skilled in the art will recognize the broader applicability of the present invention. Those of ordinary skill in the art will recognize that terms such as above, below, upward, downward, etc. are used to describe the drawings and do not represent limitations on the scope of the present invention as defined by the appended claims. Any numerical designations such as first or second are merely exemplary and are not intended to limit the scope of the present invention in any way.

[0021] Example 1 A kind of anti-residue spiral belt vacuum dryer, such as Figure 1-Figure 6 As shown, a dryer is included; the dryer is composed of a conical drying cylinder 1, a motor 2, a rotating rod 3, a feeding pipe 4, a heating coil 11 and an exhaust pipe 12; the conical drying cylinder 1 is fixedly connected to the motor 2; the output shaft of the motor 2 is fixedly connected to the rotating rod 3, and the rotating rod 3 passes through the conical drying cylinder 1; the conical drying cylinder 1 is connected to the feeding pipe 4; the conical drying cylinder 1 is provided with a heating coil 11; the conical drying cylinder 1 is connected to the exhaust pipe 12; It also includes a sliding rod 5, a spring 6, a screw belt 7, an electric push rod 8, a circular block 9, and a discharge pipe 10; the rotating rod 3 is slidably connected to the sliding rod 5; a spring 6 is fixedly connected between the sliding rod 5 and the rotating rod 3; the sliding rod 5 is fixedly connected to a screw belt 7, and the screw belt 7 does not contact the inner wall of the conical drying cylinder 1; three electric push rods 8 are fixedly connected to the conical drying cylinder 1; the telescopic parts of all the electric push rods 8 are fixedly connected to a circular block 9, and the circular block 9 is in contact with the sliding rod 5; the circular block 9 is connected to three discharge pipes 10; the discharge pipe 10 runs through the conical drying cylinder 1; each discharge pipe 10 is provided with a control valve.

[0022] The spiral belt 7 is provided with a scraping portion 7001, which contacts the upper surface of the circular block 9. The scraping portion 7001 scrapes the residual material, thereby preventing some materials from being unable to be discharged normally.

[0023] It also includes a connecting block 101 connected to the circular block 9; the connecting block 101 is fixedly connected to six protrusions 102; the protrusion 102 is in contact with the sliding rod 5, and six protrusions 2 103 are fixedly connected to the bottom of the sliding rod 5; the protrusions 102 and the protrusions 2 103 are staggered.

[0024] The circular block 9 is provided with a partition 9001, which contacts the outer side of the sliding rod 5 to prevent the material from entering between the sliding rod 5 and the connecting block 101 when the sliding rod 5 rises.

[0025] It also includes a material blocking belt 121 fixedly connected to the circular block 9; the material blocking belt 121 is fixedly connected to the conical drying cylinder 1, and the material blocking belt 121 is made of high-temperature resistant rubber material (resistant to high temperatures of 200 degrees) to avoid air leakage.

[0026] The material blocking belt 121 after unfolding is in an inverted cone shape, so that the spiral belt 7 is lowered and contacts with the material blocking belt 121 to scrape off the remaining materials.

[0027] The specific working steps are: The feed pipe 4 is connected to an external feeding device; the exhaust pipe 12 is connected to an external vacuum pump; and a collection box is placed below the discharge pipe 10 .

[0028] When drying materials such as powders or particles, first, the external feeding equipment discharges a fixed amount (70% of the volume of the conical drying cylinder 1) of the material into the conical drying cylinder 1 through the feed pipe 4. After the material is discharged, the external vacuum pump sucks air into the conical drying cylinder 1 through the exhaust pipe 12 to put the conical drying cylinder 1 in a vacuum state, and then the heating ring 11 heats the material inside the conical drying cylinder 1. At the same time, the motor 2 drives the sliding rod 5 and the spiral belt 7 to rotate counterclockwise from a top-down perspective through the rotating rod 3, so that the spiral belt 7 stirs and turns the material from bottom to top, thereby improving the drying efficiency of the material. When the drying work is completed, the control valve in the discharge pipe 10 is opened to allow the material to flow into the collection box through the discharge pipe 10 to complete the material drying work.

[0029] After the material is discharged, the electric push rod 8 drives the circular block 9 and the discharge pipe 10 to descend, and the circular block 9 descends away from the sliding rod 5, so that the spring 6 in the compressed state rebounds and pushes the sliding rod 5 to descend. Figure 5As shown in the figure, the outer side of the spiral belt 7 will contact the inner wall of the conical drying cylinder 1, and the scraping part 7001 of the spiral belt 7 will keep in contact with the circular block 9, and then the control motor 2 will drive the spiral belt 7 to rotate clockwise from a top-down perspective through the rotating rod 3 and the sliding rod 5. Since the spiral belt 7 is in contact with the inner wall of the conical drying cylinder 1 at this time, the spiral belt 7 will scrape off the residual material attached to the inner wall of the conical drying cylinder 1, and the residual material will fall downward onto the circular block 9 along the rotating spiral belt 7, and then the residual material falling on the circular block 9 will be pushed by the rotating scraping part 7001 to enter the discharge pipe 10, and finally the discharge pipe 10 will discharge it; When the material is being dried, the electric push rod 8 drives the circular block 9 to push the sliding rod 5 to rise, so that the sliding rod 5 drives the spiral belt 7 to rise without contacting the inner wall of the conical drying cylinder 1, so as to avoid the wear of the spiral belt 7 and the conical drying cylinder 1 when the material is stirred. Only when the residual material is scraped off, the spiral belt 7 and the conical drying cylinder 1 are in short contact and the wear is small. In this way, the spiral belt 7 can stir the material while scraping off the residual material on the inner wall of the conical drying cylinder 1, so as to avoid the phenomenon of material residue on the inner wall of the conical drying cylinder 1 and the mixing of the residual material with other subsequent batches of materials, so as to ensure the quality of the material.

[0030] Considering that after the granular material is scraped off by the spiral belt 7, the granular material can directly fall down along the spiral belt 7, while the powder material is easy to adhere to the spiral belt 7 due to its poor fluidity, and cannot be cleaned by the rotation of the spiral belt 7 alone. Therefore, after the material attached to the inner wall of the conical drying cylinder 1 is scraped off, the electric push rod 8 first drives the connecting block 101 to rise through the circular block 9 and contact the protrusion 2 103 of the sliding rod 5, and at the same time pushes the sliding rod 5 to drive the spiral belt 7 to rise back to its original position, and then controls the sliding rod 5 to drive the spiral belt 7 to rotate clockwise when viewed from a top view, and when the sliding rod 5 rotates, it simultaneously drives the protrusion 2 103 to rotate. When the protrusion 2 103 contacts the protrusion 1 102, it is restricted by the protrusion 102, causing the sliding rod 5 to rise and squeeze the spring 6. The spring 6 is in a compressed state. After the protrusion 2 103 moves away from the protrusion 1 102, the compressed spring 6 rebounds and pushes the sliding rod 5, so that The second protrusion 103 contacts the connecting block 101 again, so that the sliding rod 5 and the spiral belt 7 are in a shaking state during the rotation process. When the spiral belt 7 shakes, the scraped powder material will quickly fall from the spiral belt 7 to ensure the cleaning effect of the material. It should be noted that when the spiral belt 7 descends to clean the material attached to the conical drying cylinder 1, the circular block 9 and the connecting block 101 need to descend without contacting the sliding rod 5 to avoid the contact between the protrusion 102 and the second protrusion 103, which causes the sliding rod 5 and the spiral belt 7 to shake. The shaking of the spiral belt 7 is not only inconvenient to scrape the material, but also easy to hit the inner wall of the conical drying cylinder 1. Therefore, when the spiral belt 7 is shaken later to shake off the material attached to the spiral belt 7, it is necessary to control the electric push rod 8 to drive the connecting block 101 to rise and contact the sliding rod 5 through the circular block 9, and at the same time push the sliding rod 5 to drive the spiral belt 7 to rise back to its original position.

[0031] During the material drying process, the sliding rod 5 is squeezed by the connecting block 101, so that the spiral belt 7 does not contact the conical drying cylinder 1. When the sliding rod 5 rotates, it is restricted by the setting of the protrusion 2 103 and the protrusion 1 102, so that the sliding rod 5 and the spiral belt 7 are in a shaking state. The shaking of the spiral belt 7 loosens the material, prevents agglomeration, improves heat transfer, reduces residue, and dries evenly, which can significantly improve the drying efficiency and quality.

[0032] Considering that the circular block 9 needs to be lowered when cleaning the residual material, and the circular block 9 will not contact the conical drying cylinder 1 when it is lowered, and the cleaned material will easily flow away from the gap between the circular block 9 and the conical drying cylinder 1 after it falls, so the circular block 9 and the conical drying cylinder 1 are fixedly connected with a material blocking belt 121. When the circular block 9 falls, it will drive the material blocking belt 121 to fall together, so that the material blocking belt 121 is unfolded, and the material blocking belt 121 plays a blocking role, preventing the cleaned material from flowing away from the gap between the circular block 9 and the conical drying cylinder 1, which is not conducive to collection, and the unfolded material blocking belt 121 is inverted cone shape, such as Figure 5In the state shown, the screw belt 121 will be fitted with the screw belt 7, so that the screw belt 7 rotates to clean the inner side of the material blocking belt 121 to prevent the fallen materials from adhering to the material blocking belt 121, resulting in incomplete cleaning.

[0033] It should be noted that, when the circular block 9 rises back to its original position, the rotation of the spiral belt 7 will limit the deformation direction of the material blocking belt 121, so as to prevent it from blocking the discharge pipe 10 and affecting the discharge of materials during the subsequent drying operation.

[0034] Example 2 On the basis of Example 1, Figure 2 , Figure 3 and Figure 6 As shown, it also includes a screw belt 211 fixedly connected to the lower part of the sliding rod 5; the screw belt 211 has a spiral direction opposite to that of the screw belt 1 7, and the screw belt 211 is located on the inner side of the screw belt 1 7.

[0035] It also includes three limit blocks 221 fixedly connected to the conical drying cylinder 1 . A protrusion 5001 is provided on the upper part of the sliding rod 5 . The limit block 221 is L-shaped, and its horizontal part is located below the protrusion 5001 .

[0036] The side of the spiral belt 7 away from the sliding rod is set to rubber material, so that the outer side of the spiral belt 7 is in soft contact with the conical drying cylinder 1, which can reduce the wear of the inner wall of the conical drying cylinder 1 and extend the service life of the conical drying cylinder 1.

[0037] The rubber part of the screw belt 7 is detachably connected to the main body. When the outer side of the screw belt 7 is excessively worn, the rubber part of the screw belt 7 can be directly replaced without replacing the entire screw belt 7, thereby reducing costs.

[0038] The specific working steps are: It is considered that when the spiral ribbon 7 rotates counterclockwise to stir and flip the material from bottom to top, the specific flipping process of the material is: the outer layer material close to the inner wall of the conical drying cylinder 1 is pushed upward by the spiral ribbon 7, and the inner layer material flows to the inner wall of the conical drying cylinder 1 to fill the space generated after the outer layer material is pushed. The outer layer material is pushed upward to fill the space generated by the inner layer material. However, since the inner layer material is not pushed by the spiral ribbon 7, the flow speed of the inner layer material is slow. Therefore, in order to speed up the flow speed of the inner and outer layer materials and enhance the material flipping effect, the sliding rod 5 will drive the spiral ribbon 211 to rotate when it rotates. The spiral direction of the spiral ribbon 211 is opposite to that of the spiral ribbon 7. The rotation of the spiral ribbon 211 can quickly push the inner layer material downward, thereby speeding up the flow and alternation speed of the inner and outer layer materials, thereby improving the drying uniformity, shortening the drying time, improving the product quality, enhancing the mixing effect, improving the equipment efficiency and reducing the material residue.

[0039] When the circular block 9 and the connecting block 101 descend and do not contact the sliding rod 5, and the sliding rod 5 and the spiral belt 7 move downward under the influence of the gravity of the material and the rebound thrust of the spring 6, the protrusion 5001 is blocked by the limit block 221, so that the sliding rod 5 cannot move downward, thereby limiting the downward movement distance of the sliding rod 5, while ensuring that the spiral belt 7 descends and contacts the conical drying cylinder 1, the spiral belt 7 is prevented from being closely fitted with the conical drying cylinder 1 due to the gravity of the material and the rebound thrust of the spring 6, resulting in increased friction between the spiral belt 7 and the conical drying cylinder 1 when the spiral belt 7 rotates, thereby increasing the maintenance cost of the spiral belt 7.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. A residual-proof spiral ribbon vacuum dryer, characterized in that: The invention comprises a dryer; a sliding rod (5), a spring (6), a spiral belt (7), an electric push rod (8), a circular block (9), and a discharge pipe (10); the dryer is connected to the sliding rod (5); a spring (6) is fixedly connected between the sliding rod (5) and the dryer; the sliding rod (5) is fixedly connected to the spiral belt (7); the dryer is connected to at least three electric push rods (8); the telescopic parts of all the electric push rods (8) are fixedly connected to the circular block (9), and the circular block (9) is in contact with the sliding rod (5); the circular block (9) is connected to at least three discharge pipes (10); and each discharge pipe (10) is provided with a control valve.

2. The anti-residue spiral ribbon vacuum dryer according to claim 1, characterized in that: The first screw belt (7) is provided with a scraping portion (7001), and the scraping portion (7001) is in contact with the surface of the circular block (9).

3. The anti-residue spiral ribbon vacuum dryer according to claim 1, characterized in that: It also includes a connecting block (101) connected to the circular block (9); the connecting block (101) is fixedly connected to at least six first protrusions (102); the first protrusion (102) is in contact with the sliding rod (5), and the bottom of the sliding rod (5) is fixedly connected to at least six second protrusions (103); the first protrusions (102) and the second protrusions (103) are staggered.

4. The anti-residue spiral ribbon vacuum dryer according to claim 3, characterized in that: The circular block (9) is provided with a partition (9001), and the partition (9001) is in contact with the outer side of the sliding rod (5).

5. The anti-residue spiral ribbon vacuum dryer according to claim 4, characterized in that: It also includes a material blocking belt (121) fixedly connected to the circular block (9); the material blocking belt (121) is connected to the dryer, and the material blocking belt (121) is made of high-temperature resistant rubber material.

6. The anti-residue spiral ribbon vacuum dryer according to claim 5, characterized in that: The material blocking belt (121) is in an inverted cone shape after being unfolded.

7. The anti-residue spiral ribbon vacuum dryer according to claim 1, characterized in that: It also includes a second screw belt (211) fixedly connected to the lower part of the sliding rod (5); the spiral direction of the second screw belt (211) is opposite to that of the first screw belt (7), and the second screw belt (211) is located on the inner side of the first screw belt (7).

8. The anti-residue spiral ribbon vacuum dryer according to claim 7, characterized in that: It also includes a plurality of limit blocks (221) connected to the dryer. A protrusion (5001) is provided on the upper portion of the sliding rod (5). The limit block (221) is L-shaped, and its horizontal portion is located below the protrusion (5001).

9. The anti-residue spiral ribbon vacuum dryer according to claim 7, characterized in that: The side of the screw belt 1 (7) away from the sliding rod (5) is provided with a rubber material.

10. The anti-residue spiral ribbon vacuum dryer according to claim 9, characterized in that: The rubber part of the screw belt 1 (7) is detachably connected to the main body.

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