Drying device for PVC electric power pipe plastic production materials

Abstract

The utility model discloses a PVC electric power pipe plastic production material drying device which comprises an inner barrel and an outer barrel, the inner barrel and the outer barrel are coaxially arranged, a plurality of filter holes are formed in the inner barrel, a transmission mechanism is arranged between the inner barrel and the outer barrel, an air inlet pipe is arranged in the center of the top of the inner barrel, the lower end of the air inlet pipe is communicated with the interior of the inner barrel, and the upper end of the air inlet pipe is communicated with the interior of the outer barrel. A heating wire is arranged in the air inlet pipe, a draught fan is arranged at the position, located above the heating wire, of the air inlet pipe, the draught fan is arranged on the outer barrel, external air is conveyed into the inner barrel through the air inlet pipe through the draught fan, the air is heated through the heating wire during conveying, and hot air flow is formed and enters the inner barrel to dry production raw materials. Meanwhile, by matching with the condition that the inner barrel drives the production raw materials to rotate at a high speed, the contact area between the production raw materials and hot air flow is effectively increased, the drying efficiency is further improved, and the situation that in the prior art, due to direct heating of an electric heating strip, local overheating is easily caused, and thermal decomposition of PVC particles is possibly caused is avoided.

Description

Technical Field

[0001] This utility model relates to the field of drying equipment technology, and in particular to a drying device for PVC power pipe plastic production materials. Background Technology

[0002] PVC power conduits are commonly used as cable protection conduits. This product features high strength, good flexibility, high temperature resistance, corrosion resistance, flame retardancy, excellent insulation, no pollution, resistance to aging, light weight, and convenient construction. Its performance is significantly superior to traditional asbestos cable conduits and ordinary PVC pipes, making it an ideal replacement for traditional power cable sheathing conduits.

[0003] Utility model CN214199516U discloses a drying device for PVC power pipe production, relating to the field of PVC power pipe processing technology. It includes an outer barrel, an inner barrel, and support legs. One right end of the inner barrel is rotatably connected to the inner right side wall of the outer barrel via a rotating shaft. The rotating shaft passes through the outer barrel's side wall and is connected to the output shaft of an external rotating motor. The left end of the inner barrel is connected to the inner left side wall of the outer barrel via a rotating mechanism. The rotating mechanism includes a sliding ring and a first groove on the inner right side wall of the outer barrel. The sliding ring is inserted into the first groove and slidably connected to its inner wall. A stirring shaft is fixedly connected to the center of the inner right side wall of the outer barrel, with one end extending to the inner right end of the inner barrel. Stirring blades are provided at both ends of the stirring shaft. Multiple ventilation mesh sections are provided on the inner barrel's side wall, and a material inlet is opened at the top of the inner barrel. This utility model overcomes the shortcomings of the prior art, has a reasonable design, is easy to use, and effectively improves the uniformity and efficiency of raw material drying.

[0004] The device disclosed in the above utility model has an electric heating strip on the stirring blade for direct heating, which is prone to causing local overheating and may cause thermal decomposition of PVC particles. Summary of the Invention

[0005] The purpose of this invention is to provide a drying device for PVC power pipe plastic production, in order to solve the problem mentioned in the background art that direct heating with electric heating strips on the stirring blades can easily cause local overheating, which may lead to thermal decomposition of PVC particles.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a drying device for PVC power pipe plastic production materials, comprising an inner barrel and an outer barrel, the inner barrel and the outer barrel being coaxially arranged, and the inner barrel being provided with a plurality of filter holes, a transmission mechanism being provided between the inner barrel and the outer barrel, an air inlet pipe being provided at the top center of the inner barrel, the lower end of the air inlet pipe being connected to the interior of the inner barrel, a heating wire being provided inside the air inlet pipe, a fan being provided above the heating wire on the air inlet pipe, and the fan being provided on the outer barrel.

[0007] Preferably, a limiting tube is connected to the top of the air intake pipe, and a filter screen is provided between the air intake pipe and the limiting tube.

[0008] Preferably, the limiting tube and the air intake tube are connected by a detachable clamp.

[0009] Preferably, the bottoms of both the inner and outer tubs are conical, and the bottom of the inner tub is connected to a discharge pipe, with a filter-like valve installed at the bottom of the discharge pipe.

[0010] Preferably, a flow guide block is provided at the bottom of the outer barrel, and a dust removal pipe is provided at the opposite position of the flow guide block.

[0011] Preferably, the transmission mechanism includes a connecting plate disposed on the outer barrel, a gear rotatably connected to the connecting plate, a gear meshing with a gear ring, the gear ring being connected to the top wall of the inner barrel, a protective shell disposed on the gear and gear ring, a transmission motor connected to the protective shell, and the output shaft of the transmission motor being connected to the gear.

[0012] Preferably, the top of the inner barrel is provided with a feeding port, and a cover plate is rotatably connected to the feeding port.

[0013] The beneficial effects of this utility model are:

[0014] In this invention, a fan delivers outside air to the inner drum through the air inlet pipe. During delivery, the air is heated by a heating wire, forming a hot airflow that enters the inner drum to dry the raw materials. This, combined with the high-speed rotation of the raw materials by the inner drum, effectively increases the contact area between the raw materials and the hot airflow, further improving drying efficiency. This avoids the problem of localized overheating caused by direct heating with electric heating strips in existing technologies, which could lead to thermal decomposition of PVC particles. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of a drying device for PVC power pipe plastic production proposed in this utility model;

[0016] Figure 2 This is a front cross-sectional view of a drying device for PVC power pipe production according to the present invention.

[0017] Figure 3 This is an enlarged structural diagram of point A of a drying device for PVC power pipe plastic production proposed in this utility model;

[0018] Figure 4 This is a schematic diagram of the air inlet pipe and heating wire of a drying device for PVC power pipe production materials proposed in this utility model;

[0019] Figure 5This is a top sectional view of the transmission mechanism of a drying device for PVC power pipe production materials proposed in this utility model.

[0020] In the diagram: 1. Inner drum; 2. Outer drum; 3. Transmission mechanism; 4. Air inlet pipe; 5. Heating wire; 6. Fan; 7. Limiting pipe; 8. Filter screen; 9. Discharge pipe; 10. Guide block; 11. Dust removal pipe; 12. Valve; 13. Feeding port; 14. Cover plate;

[0021] 31. Connecting plate; 32. Gear; 33. Gear ring; 34. Protective shell; 35. Drive motor. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Reference Figure 1-5 A drying device for PVC power pipe production includes an inner barrel 1 and an outer barrel 2, which are coaxially arranged. The inner barrel 1 has several filter holes. A transmission mechanism 3 is provided between the inner barrel 1 and the outer barrel 2. An air inlet pipe 4 is provided at the top center of the inner barrel 1. The lower end of the air inlet pipe 4 is connected to the inside of the inner barrel 1. A heating wire 5 is provided inside the air inlet pipe 4. A fan 6 is provided above the heating wire 5 on the air inlet pipe 4. The fan 6 is provided on the outer barrel 2.

[0024] When using this device, the raw materials are put into the inner barrel 1, and then the transmission mechanism 3 is started. The transmission mechanism 3 controls the inner barrel 1 to rotate at high speed inside the outer barrel 2, thereby driving the raw materials to rotate. Under centrifugal force, some of the moisture on the raw materials is separated out through the filter holes on the inner barrel 1. Then, the fan 6 and heating wire 5 are connected to the power supply. The fan 6 delivers outside air to the inner barrel 1 through the air inlet pipe 4. During delivery, the air is heated by the heating wire 5, forming a hot airflow that enters the inner barrel 1 to dry the raw materials. At the same time, in conjunction with the high-speed rotation of the raw materials driven by the inner barrel 1, the contact area between the raw materials and the hot airflow is effectively increased, further improving the drying efficiency. This avoids the situation in the prior art where direct heating by electric heating strips can easily cause local overheating, which may lead to thermal decomposition of PVC particles.

[0025] Specifically, in this embodiment, the top of the air inlet pipe 4 is connected to the limiting pipe 7, and a filter screen 8 is provided between the air inlet pipe 4 and the limiting pipe 7. By providing the filter screen 8 at the air inlet of the fan 6, the external air can be filtered by the filter screen 8 before being drawn into the fan 6, thereby preventing dust attached to the air from entering the inner barrel 1 and affecting the purity of the production materials.

[0026] Specifically, in this embodiment, the limiting tube 7 and the air intake tube 4 are connected by a detachable clamp, which makes it easy for the user to remove the limiting tube 7 from the air intake tube 4, take out the filter screen 8, and thus achieve the purpose of cleaning the filter screen 8.

[0027] Specifically, in this embodiment, the bottoms of both the inner barrel 1 and the outer barrel 2 are conical. The bottom of the inner barrel 1 is connected to a discharge pipe 9, and a filter-like valve 12 is installed at the lower part of the discharge pipe 9. The conical shape facilitates the accumulation of dust filtered by the inner barrel 1 on the outer barrel 2 at the bottom of the outer barrel 2, and facilitates the settling of the production raw materials in the inner barrel 1 at the bottom of the inner barrel 1 and discharge through the discharge pipe 9. The valve 12 facilitates the control of the discharge of production raw materials, and at the same time, the filter-like design can form an air outlet to realize the internal and external circulation of air.

[0028] Specifically, in this embodiment, a guide block 10 is provided at the bottom of the outer barrel 2, and a dust removal pipe 11 is provided at the opposite position of the guide block 10. The guide block 10 facilitates the guidance of dust in the outer barrel 2 towards the dust removal pipe 11, and then the dust is discharged through the dust removal pipe 11.

[0029] Specifically, in this embodiment, the transmission mechanism 3 includes a connecting plate 31 disposed on the outer drum 2. A gear 32 is rotatably connected to the connecting plate 31. A gear ring 33 meshes with the gear 32. The gear ring 33 is connected to the top wall of the inner drum 1. A protective shell 34 is disposed on the gear 32 and the gear ring 33. A transmission motor 35 is connected to the protective shell 34. The output shaft of the transmission motor 35 is connected to the gear 32. When the transmission mechanism 3 is running, the transmission motor 35 drives the gear 32 to rotate, thereby driving the gear ring 33 to rotate, and then driving the inner drum 1 to rotate, so as to achieve the purpose of driving the production material to rotate.

[0030] Specifically, in this embodiment, the top of the inner barrel 1 is provided with a feeding port 13, and a cover plate 14 is rotatably connected to the feeding port 13, so that the staff can open the feeding port 13 by rotating the cover plate 14 to feed materials. When the device is running, the cover plate 14 is closed to prevent dust from overflowing from the device and causing pollution to the production environment.

[0031] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A drying device for PVC power pipe production materials, comprising an inner barrel (1) and an outer barrel (2), characterized in that: The inner barrel (1) and the outer barrel (2) are coaxially arranged, and the inner barrel (1) is provided with several filter holes. A transmission mechanism (3) is provided between the inner barrel (1) and the outer barrel (2). An air inlet pipe (4) is provided at the top center of the inner barrel (1). The lower end of the air inlet pipe (4) is connected to the inside of the inner barrel (1). A heating wire (5) is provided inside the air inlet pipe (4). A fan (6) is provided above the heating wire (5) on the air inlet pipe (4). The fan (6) is provided on the outer barrel (2).

2. The drying device for PVC power pipe production materials according to claim 1, characterized in that: The top of the air intake pipe (4) is connected to a limiting pipe (7), and a filter screen (8) is provided between the air intake pipe (4) and the limiting pipe (7).

3. The PVC power pipe plastic production material drying device according to claim 2, characterized in that: The limiting tube (7) and the air intake tube (4) are connected by a detachable clamp.

4. The drying device for PVC power pipe production materials according to claim 1, characterized in that: The bottoms of the inner barrel (1) and the outer barrel (2) are both conical. The bottom of the inner barrel (1) is connected to a discharge pipe (9), and a valve (12) in the shape of a filter screen is provided at the bottom of the discharge pipe (9).

5. A drying device for PVC power pipe production materials according to claim 4, characterized in that: The bottom of the outer barrel (2) is provided with a flow guide block (10), and a dust removal pipe (11) is provided opposite to the flow guide block (10).

6. The drying device for PVC power pipe production materials according to claim 1, characterized in that: The transmission mechanism (3) includes a connecting plate (31) disposed on the outer barrel (2), a gear (32) is rotatably connected to the connecting plate (31), a gear ring (33) meshes on the gear (32), the gear ring (33) is connected to the top wall of the inner barrel (1), a protective shell (34) is provided on the gear (32) and the gear ring (33), a transmission motor (35) is connected to the protective shell (34), and the output shaft of the transmission motor (35) is connected to the gear (32).

7. A drying device for PVC power pipe production materials according to claim 6, characterized in that: The inner barrel (1) has a feeding port (13) at the top, and a cover plate (14) is rotatably connected to the feeding port (13).

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