CN104315825A - Air flow drying device with double helix structure - Google Patents

Abstract

The invention discloses airflow drying equipment with a double helix structure, which comprises an outer drying cylinder and an inner drying cylinder. The outer drying cylinder comprises an outer cylinder body with openings at both upper and lower ends, which is fixedly connected to the upper end of the outer cylinder body and closed. The top cover with the upper end open, the bottom of the cylinder which is fixedly connected to the lower end of the outer cylinder and closes the opening of the lower end of the outer cylinder, the upper part of the side wall of the outer cylinder is provided with a feed port through the side wall, and the upper and lower ends of the inner drying cylinder are open , the inner drying cylinder and the outer cylinder are coaxially arranged, the lower end opening is set in the outer cylinder body, the upper end opening passes through the top cover, and the area between the inner wall of the outer cylinder and the outer wall of the inner drying cylinder is provided with a spiral downward guide plate, Spiral upward grooves are arranged on the inner wall of the inner drying cylinder. The invention overcomes the shortcomings of the existing airflow dryer, reduces the height of the equipment, prolongs the residence time of materials in the dryer, and has the advantages of good drying performance, convenient operation, small volume and low cost.

Description

Airflow drying equipment with double helix structure

technical field

The invention relates to the field of airflow dryers, in particular to airflow drying equipment with a double helix structure.

Background technique

The airflow dryer has the advantages of high drying strength, large processing capacity, and simple equipment, and has been widely used in the pharmaceutical, food, and chemical industries. However, the traditional airflow dryer has high equipment, takes up a large space, and the overall structure is not compact, which is easy to cause heat loss, low thermal efficiency, and brings certain difficulties to installation, maintenance, and cleaning.

Contents of the invention

The object of the present invention is to overcome the shortcomings of the above-mentioned existing airflow dryers, and provide airflow drying equipment with a double helix structure.

The purpose of the present invention is achieved through the following technical solutions: airflow drying equipment with a double helix structure, including an outer drying cylinder and an inner drying cylinder, the outer drying cylinder includes an outer cylinder body with openings at both upper and lower ends, and is fixedly connected to the outer cylinder The upper end of the outer cylinder body and the top cover that closes the upper end opening of the outer cylinder body, and the cylinder bottom that is fixedly connected to the lower end of the outer cylinder body and closes the lower end opening of the outer cylinder body. The upper and lower ends of the drying cylinder are open, the inner drying cylinder and the outer cylinder are coaxially arranged, the lower end opening is set in the outer cylinder body, the upper end opening passes through the top cover, and the area between the inner wall of the outer cylinder and the outer wall of the inner drying cylinder is set There is a spiral downward guide plate, and a spiral upward groove is arranged on the inner wall of the inner drying cylinder. In the present invention, the guide plate is used to guide the material to spiral downward in the outer drying cylinder; the bottom of the cylinder is used to temporarily accommodate the material reaching the bottom; the groove is used to form a spiral upward airflow to drive the material spiral upward in the inner drying cylinder; The mouth is used as the material inlet, and is used to connect the hot air pipe to provide hot air flow from the tangential direction; the lower opening of the inner drying cylinder is used to absorb the material contained on the bottom of the cylinder; the upper opening of the inner drying cylinder is used as the material outlet, and is also used to connect the induced draft fan .

In order to speed up the speed at which the opening at the lower end of the inner drying cylinder absorbs materials, further, the lower end of the inner drying cylinder is provided with a conical cylinder with a small top and a large bottom, and the upper end surface of the conical cylinder is fixedly connected with the lower end surface of the inner drying cylinder.

In order to increase the drying temperature of the outer wall and the inner wall of the inner drying cylinder, further, a first heating element is arranged in the inner drying cylinder wall.

In order to increase the drying temperature in the outer drying cylinder, further, a second heating element is arranged in the guide plate.

In order to make it easier for the materials contained on the bottom of the cylinder to be absorbed by the inner drying cylinder, further, the bottom of the cylinder is formed by a concave in the middle of the circular panel. In this way, the accumulation of material in the dead corner on the bottom of the cylinder can be avoided.

In order to facilitate the maintenance and cleaning of the inner and outer drying cylinders, further, a protruding ring is provided at the lower end of the outer cylinder, and a ring groove matching the protruding ring is provided on the upper surface of the bottom of the cylinder, and the protruding ring is placed in the ring groove. The locking screw passes through the ring groove and the protruding ring to securely connect the outer cylinder body with the bottom of the cylinder.

Compared with the traditional airflow dryer, the beneficial effect of the present invention is: in the present invention, the height of the equipment is reduced by setting the guide plate spirally downward and the groove spirally upward, prolonging the residence time of the material in the dryer, and having It has the advantages of good drying performance, operation, small size and low cost.

Description of drawings

Fig. 1 is a structural schematic diagram of a specific embodiment of the airflow drying equipment with a double helix structure according to the present invention.

The marks in the attached drawings and the names of corresponding parts: 1. Outer drying cylinder, 11. Outer cylinder, 12. Top cover, 13. Bottom of cylinder, 14. Feeding port, 15. Protruding ring, 2. Inner drying cylinder, 21. groove, 22. conical cylinder, 23. first heating element, 3. guide plate, 4. hot air duct, 5. bracket.

Detailed ways

The present invention will be further described in detail below in conjunction with the embodiments and the accompanying drawings, but the embodiments of the present invention are not limited thereto.

Example 1:

As shown in Figure 1, the airflow drying equipment with a double helix structure includes an outer drying cylinder 1 and an inner drying cylinder 2. 11, the top cover 12 that closes the upper opening of the outer cylinder 11, and the bottom 13 that is fixedly connected to the lower end of the outer cylinder 11 and closes the opening of the lower end of the outer cylinder 11. Material port 14, the upper and lower ends of the inner drying cylinder 2 are open, the inner drying cylinder 2 is coaxially arranged with the outer cylinder body 11, the lower end opening is arranged in the outer cylinder body 11, the upper end opening passes through the top cover 12, and the outer The area between the inner wall of the cylinder body 11 and the outer wall of the inner drying cylinder 2 is provided with a spiral downward guide plate 3, and the inner wall of the inner drying cylinder 2 is provided with a spiral upward groove 21. When this embodiment is applied, brackets 5 are fixedly connected to both sides of the outer drying cylinder 11 to support this embodiment. The feed inlet 14 is fixedly connected with a hot air duct 4, and the end of the hot air duct 4 communicates with a heater and a feeder, and is used to transmit hot air flow and wet materials to the outer drying cylinder 1. Since the outer cylinder 1 is provided with a spiral downward guide plate 3, the wet material moves downward spirally along the upper end surface of the guide plate 3 under the action of the hot air flow, and is dried in the outer drying cylinder 1. The upper opening of the inner drying cylinder 2 is fixedly connected with the induced draft fan to drive the materials in the inner drying cylinder 2 to move upward and be discharged from the upper opening. Since the inner drying cylinder 2 is provided with a spiral upward groove 21, under the action of the induced draft fan, the inner drying cylinder 2 has a spiral upward airflow. When the material moves down to the bottom 13 of the cylinder, the dried material is entrained by the air flow and driven by the air flow of the induced draft fan, and moves upwards from the inner drying cylinder 2 to be further dried.

Example 2

The present embodiment is further limited as follows on the basis of Embodiment 1: the lower end of the inner drying cylinder 2 is provided with a conical cylinder 22 with a small upper part and a larger lower part, and the upper end surface of the conical cylinder 22 and the lower end surface of the inner drying cylinder 2 Fixed connection.

Example 3

In this embodiment, the following further limitations are made on the basis of Embodiment 1; the inner drying cylinder 2 is provided with a first heating element 23 in the cylinder wall. In this embodiment, the first heating element 23 can choose to heat a metal wire, a metal rod, or the like.

Example 4

In this embodiment, the following further limitations are made on the basis of the embodiment 1: the second heating element is arranged in the guide plate 3 . In this embodiment, the second heating element may choose to heat a metal wire, a metal sheet, or the like.

Example 5

In this embodiment, the following further limitations are made on the basis of any one of the embodiments 1 to 4; the bottom 13 of the cylinder is formed by a concave in the middle of the circular panel. In this embodiment, the lowest point of the cylinder bottom 13 may be located on the neutral line of the inner drying cylinder 2 . During application, the material in the outer cylinder 11 concentrates towards the lowest point of the cylinder bottom 13 and the surrounding area under the action of gravity, so as to be easily absorbed and driven by the inner drying cylinder 2 .

Example 6

This embodiment makes the following further limitations on the basis of Embodiment 5: a protruding ring 15 is provided at the lower end of the outer cylinder 11, and an annular groove matching the protruding ring 15 is provided on the upper end of the cylinder bottom 13, and the protruding ring 15 is placed in the ring groove, and the outer cylinder body 11 is fixedly connected with the cylinder bottom 13 through the ring groove and the protruding ring 15 by locking screws.

The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be assumed that the specific embodiments of the present invention are limited to these descriptions. For those of ordinary skill in the technical field to which the present invention belongs, other implementations obtained without departing from the technical solution of the present invention shall be included in the protection scope of the present invention.

Claims (6)

1. Airflow drying equipment with a double helix structure, characterized in that it includes an outer drying cylinder (1) and an inner drying cylinder (2), and the outer drying cylinder (1) includes an outer cylinder (11) with openings at both upper and lower ends ), the top cover (12) that is fixedly connected to the upper end of the outer cylinder (11) and closes the upper opening of the outer cylinder (11), and the top cover (12) that is fixedly connected to the lower end of the outer cylinder (11) and closes the lower opening of the outer cylinder (11) The cylinder bottom (13), the upper part of the side wall of the outer cylinder body (11) is provided with a feed port (14) through the side wall, the upper and lower ends of the inner drying cylinder (2) are open, and the inner drying cylinder (2) and the outer The cylinder body (11) is coaxially arranged, and its lower end opening is set in the outer cylinder body (11), and its upper end opening passes through the top cover (12), between the inner wall of the outer cylinder body (11) and the outer wall of the inner drying cylinder (2) A spiral downward guide plate (3) is provided in the upper area, and a spiral upward groove (21) is provided on the inner wall of the inner drying cylinder (2). 2. The airflow drying equipment with double helix structure according to claim 1, characterized in that: the lower end of the inner drying cylinder (2) is provided with a conical cylinder (22) with a small top and a large bottom, and the conical cylinder (22 ) is fixedly connected to the lower end surface of the inner drying cylinder (2). 3. The airflow drying equipment with a double helix structure according to claim 1, characterized in that: a first heating element (23) is arranged in the inner drying cylinder (2) cylinder wall. 4. The air drying equipment with a double helix structure according to claim 1, characterized in that: the guide plate (3) is provided with a second heating element. 5. The airflow drying equipment with a double helix structure according to any one of claims 1-4, characterized in that: the cylinder bottom (13) is formed by a concave in the middle of a circular panel. 6. The air drying equipment with double helix structure according to claim 5, characterized in that: the lower end of the outer cylinder (11) is provided with a convex ring (15), and the upper end of the cylinder bottom (13) is provided with a convex ring (15). The ring (15) matches the ring groove, the convex ring (15) is placed in the ring groove, and the outer cylinder (11) and the cylinder bottom (13) are connected by locking screws through the ring groove and the convex ring (15). Fixed connection.