Small dryer with double-helix structure

Abstract

The utility model relates to a small dryer with a double-helix structure, and belongs to the technical field of material drying. Comprising a drying shell, a spiral lifting assembly, a composite ventilation assembly and a driving device. Three material inlets and outlets are formed in a straight cylinder in the working shell at different heights; the spiral lifting assembly is installed in the drying shell, axial positioning is conducted through a straight cylinder in the working shell, and a small spiral rod and a large spiral rod are driven by a driving device to rotate and can rotate forwards and backwards. The discharge hopper is mounted at a lower outlet of the straight cylinder in the working shell; the composite ventilation assembly is installed on the supporting frame and communicates with the drying shell. By utilizing the characteristic that the small screw rod continuously lifts the materials to the large screw rod, the materials circularly flow in the drying shell, and the large screw rod can also stir the stacked materials, so that the drying effect is enhanced, and the materials are fully heated; meanwhile, due to the miniaturized structural design, the higher energy efficiency ratio is achieved, cleaning and maintenance are convenient, and the drying requirements of small and medium-sized farmers are better met.

Description

Technical Field

[0001] The utility model relates to the technical field of material drying, and particularly relates to a small dryer with a double - helix structure. Background Art

[0002] Dryers are widely used in agricultural production. Most of the existing drying equipment in China is large - and medium - sized, with a processing capacity of 5 tons, 10 tons or even larger per hour, which is suitable for large - and medium - sized granaries, farms, etc. The one - time investment is large and the operating cost is high. Moreover, in some grain dryers, especially cereal dryers, due to the stacking of cereals inside the dryer, the drying time of cereals at different heights and different levels is different. Eventually, when the cereal drying is completed, the drying effect among cereals is inconsistent, affecting the quality of cereal drying. Summary of the Invention

[0003] The purpose of the utility model is to provide a small dryer with a double - helix structure, which solves the problems of insufficient stirring and unsatisfactory drying effect of the existing small dryers. The utility model adopts a double - helix structure. By using the feature that the small screw rod continuously lifts the material onto the large screw rod, the material circulates and flows inside the drying shell. The large screw rod can also stir the stacked material, enhancing the drying effect and enabling the material to be fully heated. At the same time, the small - sized structural design brings a higher energy efficiency ratio, is convenient for cleaning and maintenance, and is more suitable for the drying needs of small - and medium - sized farmers.

[0004] The above - mentioned purpose of the utility model is achieved through the following technical solutions:

[0005] The small dryer with a double - helix structure includes a drying shell 1, a spiral lifting component 2, a composite ventilation component 3, and a driving device 4. The drying shell 1 is fixed by a support frame 101. The drying shell 1 is composed of a working shell 105, an intermediate shell 106, and an outer shell 107. Three material inlets and outlets are arranged at different heights on the inner straight cylinder of the working shell 105. The spiral lifting component 2 is installed inside the drying shell 1, axially positioned through the inner straight cylinder of the working shell 105, and drives the small screw rod 201 and the large screw rod 202 to rotate through the driving device 4. The composite ventilation component 3 is installed on the support frame 101 of the drying shell 1 and communicates with the drying shell 1.

[0006] The drying housing 1 is as follows: The outer housing 107 is fixed on the support frame 101, and the working housing 105 is connected to the outer housing 107 through the intermediate housing 106 and the connecting bolts 108; The top end cover 102 is installed on the working housing 105, the feed hopper 103 is fixed at the lower opening of the working housing 105, and the discharge hopper 104 is fixed at the opening on the bottom side wall of the inner cylinder of the working housing 105; The feed hopper 103 and the discharge hopper 104 are equipped with material inlet and outlet baffles; There are three material inlets and outlets on the inner cylinder of the working housing 105 to facilitate the inlet, outlet and circulating drying of materials.

[0007] Thermal insulation materials are placed in the space formed by the outer housing 107 and the intermediate housing 106.

[0008] The spiral lifting assembly 2 is as follows: The small screw rod 201 is installed in the inner cylinder of the working housing 105 and axially limited by the first bearing 204 and the third bearing 208; The large screw rod 202 is installed on the connecting disk 205, and the connecting disk 205 is axially positioned by the second bearing 207; The small screw rod 201 and the large screw rod 202 rotate in forward and reverse directions; The third bearing 208 is fixed on the upper end fixing seat 206, and the upper end fixing seat 206 is fixed on the top end cover 102. The first bearing 204 is fixed on the bottom end fixing seat 203, and the bottom end fixing seat 203 is fixed at the bottom of the inner cylinder of the working housing 105.

[0009] The composite ventilation assembly 3 is as follows: The hot air blower base 307 and the exhaust fan base 308 are fixed on the support frame 101, the hot air blower 301 is fixed on the hot air blower base 307, and the exhaust fan base 308 is fixed on the exhaust fan base 308; The hot air blower 301 is connected to the air inlet cylinder 303 through the first connecting cylinder 302, and the exhaust fan 304 is connected to the air outlet cylinder 306 through the second connecting cylinder 305; The air inlet cylinder 303 is installed on the intermediate housing 106, and the air outlet cylinder 306 is installed on the top end cover 102; The monitoring device 309 is fixed on the support frame 101, and the monitoring device includes a temperature sensor, a pressure sensor, a humidity sensor and a display screen.

[0010] The driving device 4 includes a motor 401, a protective housing 402 and a speed change structure 403; The motor 401 is fixed on the protective housing 402, and the speed change structure 403 is installed inside the protective housing 402 and is connected to the motor 401 and the spiral lifting assembly 2 in a matching manner.

[0011] The beneficial effects of the present utility model are as follows: The structure is simple and reliable. It adopts a double - helix structure and utilizes the characteristics of the screw rods. The small screw rod can continuously lift the materials onto the large screw rod, enabling the materials to circulate and flow in the drying shell. The large screw rod can also stir the stacked materials, achieving continuous drying, so that the materials are fully heated and the drying effect is enhanced. At the same time, compared with traditional large - scale dryers, the miniaturized structural design brings a higher energy efficiency ratio, is convenient for cleaning and maintenance, does not require extra space for installation, and is more suitable for the drying needs of small and medium - sized farmers. When combined with the monitoring device, the drying parameters can be adjusted in a timely manner to ensure the optimization of the drying effect, helping users solve the problem of grain drying. It has strong practicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The drawings described herein are used to provide a further understanding of the present utility model and form a part of this application. The schematic examples and descriptions of the present utility model are used to explain the present utility model and do not constitute an improper limitation of the present utility model.

[0013] Figure 1 is a three - dimensional structural schematic diagram of the present utility model;

[0014] Figure 2 is a front - view sectional structural schematic diagram of the present utility model;

[0015] Figure 3 is a left - view structural schematic diagram of the present utility model.

[0016] In the figure: 1, drying shell; 101, support frame; 102, top end cover; 103, feed hopper; 104, discharge hopper; 105, working shell; 106, intermediate shell; 107, outer shell; 108, connecting bolt; 2, screw lifting assembly; 201, small screw rod; 202, large screw rod; 203, bottom fixed seat; 204, bearing one; 205, connecting plate; 206, upper fixed seat; 207, bearing two; 208, bearing three; 3, composite ventilation assembly; 301, hot air blower; 302, connecting tube one; 303, air inlet tube; 304, exhaust fan; 305, connecting tube two; 306, air outlet tube; 307, hot air blower base; 308, exhaust fan base; 309, monitoring device; 4, driving device; 401, motor; 402, protective shell; 403, speed - change structure. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model. In order to make the above objects, features and advantages of the present utility model more obvious and understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0018] Referring to Figures 1 to 3 As shown, the double - helix structure small dryer of the present utility model mainly includes a drying housing 1, a spiral lifting assembly 2, a composite ventilation assembly 3, and a driving device 4. The drying housing 1 is fixed by a support frame 101. Three material inlets and outlets are provided at different heights on the straight cylinder inside the working housing 105. The spiral lifting assembly 2 is installed inside the drying housing 1, axially positioned through the straight cylinder inside the working housing 105, and drives the small spiral rod 201 and the large spiral rod 202 to rotate by relying on the driving device 4, and can rotate forward and backward. The discharge hopper 104 is installed at the lower outlet of the straight cylinder inside the working housing 105. The composite ventilation assembly 3 is installed on the support frame 101 and communicates with the drying housing 1. This device adopts a double - helix structure. By using the characteristic that the small spiral rod continuously lifts the material onto the large spiral rod, the material circulates and flows inside the drying housing. The large spiral rod can also stir the stacked materials, enhancing the drying effect and enabling the material to be fully heated. At the same time, the small - sized structural design brings a higher energy efficiency ratio, is convenient for cleaning and maintenance, and is more suitable for the drying needs of small and medium - sized farmers.

[0019] Referring to Figures 1 to 2 As shown, the drying housing 1 includes a support frame 101, a top end cover 102, a feed hopper 103, a discharge hopper 104, a working housing 105, an intermediate housing 106, an outer housing 107, and connecting bolts 108. The outer housing 107 is fixed on the support frame 101. The intermediate housing 106 connects the working housing 105 and the outer housing 107 through the connecting bolts 108. The top end cover 102 is installed on the working housing 105. The feed hopper 103 is fixed on the lower side of the working housing 105. The discharge hopper 104 is fixed on the lower side of the straight cylinder inside the working housing 105. The feed hopper 103 and the discharge hopper 104 are equipped with material inlet and outlet baffles. Three material inlets and outlets are provided on the straight cylinder inside the working housing 105 to cooperate with the inlet, outlet and circulating drying of the material. The space formed by the outer housing 107 and the intermediate housing 106 can be filled with heat - insulating materials.

[0020] Referring to Figure 2As shown, the spiral lifting assembly 2 includes a small screw rod 201, a large screw rod 202, a bottom fixed seat 203, a bearing one 204, a connecting disc 205, an upper fixed seat 206, a bearing two 207, and a bearing three 208. The small screw rod 201 is installed in the straight cylinder inside the working housing 105 and is axially limited by the bearing one 204 and the bearing three 208; the large screw rod 202 is installed on the connecting disc 205; the small screw rod 201 and the large screw rod 202 can rotate forward and backward; the connecting disc 205 is axially positioned by the bearing two 207; the upper fixed seat 206 is fixed to the top end cover 102.

[0021] See Figure 1 and Figure 3 As shown, the composite ventilation assembly 3 includes a hot air blower 301, a connecting cylinder one 302, an air inlet cylinder 303, an exhaust fan 304, a connecting cylinder two 305, an air outlet cylinder 306, a hot air blower base 307, an exhaust fan base 308, and a monitoring device 309. The hot air blower base 307 and the exhaust fan base 308 are fixed to the support frame 101; the hot air blower 301 is fixed to the hot air blower base 307; the exhaust fan base 308 is fixed to the exhaust fan base 308; the connecting cylinder one 302 connects the hot air blower 301 and the air inlet cylinder 303; the connecting cylinder two 305 connects the exhaust fan 302 and the air outlet cylinder 306; the air inlet cylinder 303 is installed on the middle housing 106; the air outlet cylinder 306 is installed on the top end cover 102; the monitoring device 309 is fixed to the support frame 101, and it also includes a temperature sensor, a pressure sensor, a humidity sensor, a display screen, etc.

[0022] See Figures 2 to 3 As shown, the driving device 4 includes a motor 401, a protective housing 402, and a speed change structure 403; the motor 401 is fixed to the protective housing 402; the speed change structure 403 is installed inside the protective housing 402 and is cooperatively connected with the motor 401 and the spiral lifting assembly 2.

[0023] See Figures 1 to 3 As shown, the working process of the small double - spiral - structure dryer of the present utility model is as follows:

[0024] First, the material to be dried is fed into the working housing 105 through the feed hopper 103. Driven by the small screw rod 201, the material is lifted to the top of the inner straight cylinder of the working housing 105 and then thrown from the upper opening of the inner straight cylinder onto the large screw rod 202. Sliding down along the large screw rod 202, the material reaches the bottom of the housing. Meanwhile, the large screw rod 202 can also stir the accumulated material, and the accumulated material is continuously lifted again, repeating the above process. During drying, the hot air blower 301 blows hot air into the working housing 105 and the intermediate housing 106 to heat the working housing 105. During the drying process, the monitoring device 309 continuously monitors the temperature, pressure and humidity of the equipment, and then takes measures such as air extraction and pressure reduction. After the material is dried, the small screw rod 201 rotates in reverse to transport the dried material out through the discharge hopper 104.

[0025] The above are only the preferred examples of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made to the present invention shall be included within the protection scope of the present invention.

Claims

1. A small dryer with a double helix structure, characterized in that: It includes a drying housing (1), a spiral lifting assembly (2), a composite ventilation assembly (3), and a driving device (4). The drying housing (1) is fixed by a support frame (101). The drying housing (1) is composed of a working housing (105), an intermediate housing (106), and an outer housing (107). There are three material inlets and outlets at different heights on the inner straight cylinder of the working housing (105). The spiral lifting assembly (2) is installed inside the drying housing (1), axially positioned through the inner straight cylinder of the working housing (105), and drives the small screw rod (201) and the large screw rod (202) to rotate through the driving device (4). The composite ventilation assembly (3) is installed on the support frame (101) of the drying housing (1) and communicates with the drying housing (1).

2. The small dryer with a double helix structure according to claim 1, characterized in that: The drying housing (1) is as follows: The outer housing (107) is fixed on the support frame (101), and the working housing (105) is connected to the outer housing (107) through the intermediate housing (106) and connecting bolts (108). The top end cover (102) is installed on the working housing (105), the feed hopper (103) is fixed at the lower opening of the working housing (105), and the discharge hopper (104) is fixed at the side wall opening at the bottom end of the inner straight cylinder of the working housing (105). The feed hopper (103) and the discharge hopper (104) are equipped with material inlet and outlet baffles.

3. The small-sized double-helix structure dryer according to claim 2, characterized in that: Insulation materials are placed in the space formed by the outer housing (107) and the intermediate housing (106).

4. The small dryer with a double helix structure according to claim 1, characterized in that: The spiral lifting assembly (2) is as follows: The small screw rod (201) is installed in the inner straight cylinder of the working housing (105) and axially limited by bearing one (204) and bearing three (208). The large screw rod (202) is installed on the connecting plate (205), and the connecting plate (205) is axially positioned by bearing two (207). The small screw rod (201) and the large screw rod (202) rotate in forward and reverse directions. Bearing three (208) is fixed on the upper end fixing seat (206), and the upper end fixing seat (206) is fixed on the top end cover (102). Bearing one (204) is fixed on the bottom end fixing seat (203), and the bottom end fixing seat (203) is fixed at the bottom end of the inner straight cylinder of the working housing (105).

5. The small dryer with a double helix structure according to claim 1, characterized in that: The composite ventilation assembly (3) is as follows: The hot air blower base (307) and the exhaust fan base (308) are fixed on the support frame (101). The hot air blower (301) is fixed on the hot air blower base (307), and the exhaust fan base (308) is fixed on the exhaust fan base (308). The hot air blower (301) is connected to the air inlet cylinder (303) through the connecting cylinder one (302), and the exhaust fan (304) is connected to the air outlet cylinder (306) through the connecting cylinder two (305). The air inlet cylinder (303) is installed on the intermediate housing (106), and the air outlet cylinder (306) is installed on the top end cover (102). The monitoring device (309) is fixed on the support frame (101), and the monitoring device includes a temperature sensor, a pressure sensor, a humidity sensor, and a display screen.

6. The small double-helix structure dryer according to claim 1, characterized in that: The described driving device (4) includes a motor (401), a protective housing (402), and a speed-changing structure (403); the motor (401) is fixed on the protective housing (402), and the speed-changing structure (403) is installed inside the protective housing (402) and is cooperatively connected with the motor (401) and the screw-lifting assembly (2).

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