Plastic hose production material powder drying and stirring machine

Abstract

The utility model provides a kind of material powder drying stirrer for plastic hose production, it is related to plastic pipe production technical field, including drying oven, fixedly installed with feed pipe in drying oven, material powder screw lifting assembly is provided in feed pipe, square sleeve is fixedly installed on the outer wall of feed pipe, hot air chamber is formed between square sleeve and feed pipe, the side wall of square sleeve relatively arranged is respectively fixedly installed with several first material buffer box, the below of each first material buffer box is provided with second material buffer box, the top of first material buffer box and the bottom of second material buffer box are respectively equipped with material powder filter screen, second material buffer box is communicated with condenser by exhaust passage, condenser, electric heating rod and hot air chamber are sequentially communicated, the utility model realizes the circulation of air in drying oven, removes water vapor in drying oven, and material powder is guided multiple times by material buffer box, so that material powder is fully contacted with high-temperature dry air, and the drying efficiency of material powder is significantly improved.

Description

Technical Field

[0001] This utility model relates to the field of plastic pipe production technology, and in particular to a drying and mixing machine for raw material powder used in the production of plastic hoses. Background Technology

[0002] Before producing plastic hoses, the raw material powder needs to be dried. Currently, most manufacturers use vertical drying mixers to dry the powder. These mixers use a screw conveyor to transport the powder from the bottom to the top and then scatter it downwards. At the same time, hot air is delivered into the drying chamber through a hot air duct. The high-temperature air comes into contact with the powder, causing the moisture in the powder to evaporate into the air. The hot and humid air is then discharged from the top exhaust vent. However, these vertical drying mixers do not have a material buffer mechanism. The scattered powder falls directly to the bottom of the drying chamber, resulting in short contact time with the high-temperature air, insufficient heat exchange, and low drying efficiency. Moreover, the powder is discharged with the air from the exhaust vent, generating dust and posing a risk of dust explosion. If a closed drying chamber is used, although dust is avoided, water vapor in the air cannot be discharged, affecting the drying efficiency of the powder.

[0003] Therefore, there is a need for a drying and mixing machine for plastic hose production materials that can solve the above problems. Utility Model Content

[0004] This utility model proposes a powder drying and mixing machine for the production of plastic hoses. It realizes the circulation of air in the drying chamber, discharges water vapor in the drying chamber, and guides the powder through the buffer box multiple times, so that the powder can fully contact the high temperature dry air, which significantly improves the drying efficiency of the powder.

[0005] The technical solution of this utility model is implemented as follows:

[0006] A powder drying and mixing machine for plastic hose production includes a drying chamber with a feed hopper and a discharge port. A vertically arranged conveying pipe is fixedly installed inside the drying chamber, and a powder spiral lifting assembly is installed inside the conveying pipe. A square sleeve is fixedly installed on the outer wall of the conveying pipe, forming a hot air chamber between the square sleeve and the conveying pipe. The hot air chamber is connected to an electric heating rod. Several first buffer boxes connected to the hot air chamber are fixedly installed on the opposite side walls of the square sleeve. The top plate of each first buffer box is inclined outward and has a hot air outlet. A second buffer box is arranged below each first buffer box. The top plate of each second buffer box is inclined inward, and the bottom plate of each second buffer box has an exhaust port. A powder filter screen is installed at the hot air outlet and the exhaust port. The second buffer box is connected to a condenser through an exhaust duct. A circulating fan is installed on the pipe between the condenser and the electric heating rod. A discharge channel is formed between the first buffer boxes and the second buffer boxes.

[0007] As a preferred technical solution, the inner wall of the drying oven is provided with two exhaust ducts, and the second buffer boxes are fixedly installed on the corresponding exhaust ducts and connected to the corresponding exhaust ducts. The exhaust ducts are connected to the air inlet of the condenser.

[0008] As a preferred technical solution, a hot air duct is fixedly installed on the outer wall of the drying oven, the electric heating rod is fixedly installed inside the hot air duct, the exhaust end of the hot air duct is connected to the hot air cavity, and the air inlet end of the hot air duct is connected to the exhaust pipe of the condenser.

[0009] As a preferred technical solution, the material powder spiral lifting assembly includes a rotating shaft rotatably installed inside the drying chamber, the rotating shaft being vertically arranged, and bolt conveying blades being provided on the rotating shaft.

[0010] As a preferred technical solution, the upper part of the drying box is square, the lower part of the drying box is a conical circulating material box, and the conveying pipe is connected to the circulating material box.

[0011] By adopting the above technical solution, the beneficial effects of this utility model are as follows:

[0012] Because the plastic hose production powder drying and mixing machine includes a first buffer box and a second buffer box, during the powder drying process, the powder spiral lifting component conveys the powder in the drying box from the bottom to the top, and throws the powder out at the top. The thrown powder falls to the bottom of the drying box along the discharge channel. When the first buffer box and the second buffer box guide the powder multiple times during the falling process, the falling speed of the powder is slowed down, so that the powder can fully contact the high temperature air, and the moisture in the powder evaporates quickly, improving the drying efficiency of the powder.

[0013] High-temperature and high-humidity air is delivered to the condenser through the exhaust vent and exhaust duct. The condenser condenses the water vapor in the high-temperature and high-humidity air into liquid water, forming dry air. The dry air then passes through the hot air duct to form high-temperature dry air, which is then reintroduced into the drying chamber to dry the powder. This invention achieves self-circulation of air in the drying chamber, effectively expelling the high-humidity air and introducing high-temperature dry air to dry the powder, thus improving the drying efficiency. Furthermore, the powder filter screen blocks the powder in the air, preventing dust generation and eliminating the risk of dust explosion. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 for Figure 1 Enlarged structural diagram at point A in the middle;

[0017] Figure 3 for Figure 1 Sectional view along the BB direction.

[0018] The components include: 1. Drying box; 2. Feed hopper; 3. Discharge port; 4. Conveying pipe; 5. Square sleeve; 6. Hot air chamber; 7. Hot air pipe; 8. First buffer box; 9. Hot air outlet; 10. Second buffer box; 11. Exhaust port; 12. Material powder filter screen; 13. Exhaust duct; 14. Circulating material box; 15. Condenser; 16. Discharge channel; 17. Electric heating rod; 18. Circulating fan; 19. Rotating shaft; 20. Bolt conveying blades; 21. Drive motor; 22. Circulating discharge port; 23. Coolant inlet; 24. Coolant outlet; 25. Condensate outlet; 26. Guide plate; 27. Support rod. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] like Figures 1-3As shown, the plastic hose production powder drying and mixing machine includes a drying chamber 1, a feeding hopper 2 and a discharge port 3 on the drying chamber 1, a vertically arranged conveying pipe 4 fixedly installed inside the drying chamber 1, a powder spiral lifting assembly installed inside the conveying pipe 4, a square sleeve 5 fixedly installed on the outer wall of the conveying pipe 4, forming a hot air chamber 6 between the square sleeve 5 and the conveying pipe 4, the hot air chamber 6 being connected to an electric heating rod 17, and several first buffer boxes 8 connected to the hot air chamber 6 fixedly installed on the opposite side walls of the square sleeve 5, each with a top plate inclined outward and equipped with a hot air outlet 9. Each first buffer box 8 is provided with a second buffer box 10 below it. The top plate of each second buffer box 10 is inclined inward. The bottom plate of each second buffer box 10 is provided with an exhaust port 11. The hot air outlet 9 and the exhaust port 11 are provided with a powder filter screen 12. The second buffer box 10 is connected to a condenser 15 through an exhaust duct 13. A circulating fan 18 is provided on the pipe between the condenser 15 and the electric heating rod 17. A material discharge channel 16 is formed between the first buffer box 8 and the second buffer box 10. In this utility model, the condenser 15 adopts the vertical tube condenser of Jiangsu Jiangnan Pharmaceutical Equipment Co., Ltd.

[0021] The inner wall of the drying oven 1 is provided with two exhaust ducts 13. The second slowing box 10 is fixedly installed on the corresponding exhaust duct 13 and connected to the corresponding exhaust duct 13. The exhaust duct 13 is connected to the air inlet of the condenser 15.

[0022] Under the action of the circulating fan 18, a negative pressure is formed in the condenser 15. The high-humidity air in the drying chamber 1 enters the exhaust duct 13 from the exhaust port 11, and then enters the condenser 15 from the exhaust duct 13. In the condenser 15, the water vapor in the high-humidity air condenses into liquid water, forming dry air. This utility model sets the exhaust duct 13 inside the drying chamber 1 so that the temperature of the exhaust duct 13 is consistent with the temperature inside the drying chamber 1, thereby avoiding the condensation of high-humidity air in the exhaust duct 13.

[0023] A hot air pipe 7 is fixedly installed on the outer wall of the drying oven 1. An electric heating rod 17 is fixedly installed inside the hot air pipe 7. The exhaust end of the hot air pipe 7 is connected to the hot air chamber 6, and the air inlet end of the hot air pipe 7 is connected to the exhaust pipe of the condenser 15.

[0024] Dry air enters the hot air pipe 7 from the exhaust pipe of the condenser 15, and is then heated by the electric heating rod 17 to form dry high-temperature air. The dry high-temperature air enters the drying chamber 1 through the circulating fan 18 to dry the powder.

[0025] The material powder spiral lifting assembly includes a rotating shaft 19 rotatably installed inside the drying chamber 1. The rotating shaft 19 is vertically arranged and has bolt conveying blades 20 on it.

[0026] The upper part of the drying box 1 is square, and the lower part of the drying box 1 is a conical circulating material box 14. The conveying pipe 4 is connected to the circulating material box 14. The circulating material box 14 is provided with a circulating discharge port 22 and a discharge port 3. The circulating discharge port 22 is connected to the feed hopper 2. A drive motor 21 is fixedly installed on the outer wall of the drying box 1. The motor shaft of the drive motor 21 is connected to the rotating shaft 19 for transmission.

[0027] The feed hopper 2 is connected to the circulating material box 14. The bolt conveying blade 20 conveys the powder in the feed hopper 2 to the circulating material box 14 and then conveys the powder in the circulating material box 14 to the top of the drying box 1. After passing through the first buffer box 8 and the second buffer box 10, the powder falls into the circulating material box 14. The bolt conveying blade 20 then conveys the powder in the circulating material box 14 to the top of the drying box 1 again. The powder is repeatedly lifted and lowered in this way to ensure that the powder is fully dried. After drying, the powder is discharged from the discharge port 3.

[0028] Two guide plates 26 are provided between the upper end of the square sleeve 5 and the conveying pipe 4. Both guide plates 26 are inclined outward. The two guide plates 26 guide the powder thrown out from the upper end of the conveying pipe 4, so that the powder falls onto the first buffer box 8 on both sides.

[0029] The condenser 15 is provided with a coolant inlet 23, a coolant outlet 24 and a condensate outlet 25.

[0030] The feed pipe 4 is fixedly installed on the inner wall of the drying oven 1 by the support rod 27.

[0031] In summary, this invention achieves air circulation within the drying chamber, removes water vapor from the chamber, and guides the powder through the buffer box multiple times, ensuring full contact between the powder and the high-temperature drying air, thus significantly improving the drying efficiency of the powder.

[0032] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A drying and mixing machine for raw material powder used in the production of plastic hoses, including a drying chamber, characterized in that, The drying chamber is equipped with a feed hopper and a discharge port. A vertically arranged conveying pipe is fixedly installed inside the drying chamber. A material powder spiral lifting assembly is installed inside the conveying pipe. A square sleeve is fixedly installed on the outer wall of the conveying pipe, forming a hot air chamber between the square sleeve and the conveying pipe. The hot air chamber is connected to an electric heating rod. Several first slowing boxes connected to the hot air chamber are fixedly installed on the opposite side walls of the square sleeve. The top plate of each first slowing box is inclined outward and has a hot air outlet. A second slowing box is arranged below each first slowing box. The top plate of each second slowing box is inclined inward and the bottom plate of each second slowing box has an exhaust port. Material powder filters are provided at the hot air outlet and the exhaust port. The second slowing box is connected to a condenser through an exhaust duct. A circulating fan is installed on the pipe between the condenser and the electric heating rod. A material discharge channel is formed between the first slowing boxes and the second slowing boxes.

2. The drying and mixing machine for plastic hose production powder according to claim 1, characterized in that, The inner wall of the drying chamber is provided with two exhaust channels. The second slowing boxes are fixedly installed on the corresponding exhaust channels and connected to the corresponding exhaust channels. The exhaust channels are connected to the air inlet of the condenser.

3. The drying and mixing machine for plastic hose production powder according to claim 2, characterized in that, A hot air duct is fixedly installed on the outer wall of the drying oven, and the electric heating rod is fixedly installed inside the hot air duct. The exhaust end of the hot air duct is connected to the hot air chamber, and the air inlet end of the hot air duct is connected to the exhaust pipe of the condenser.

4. The drying and mixing machine for plastic hose production powder according to claim 1, characterized in that, The material powder spiral lifting assembly includes a rotating shaft rotatably installed inside the drying chamber. The rotating shaft is vertically arranged and has bolt conveying blades on it.

5. The drying and mixing machine for plastic hose production powder according to any one of claims 1-4, characterized in that, The upper part of the drying box is square, and the lower part of the drying box is a conical circulating material box. The conveying pipe is connected to the circulating material box.

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