Drying device

Abstract

The utility model discloses a drying device which comprises a charging barrel, a barrel cover arranged at the upper end of the charging barrel and a conical hopper arranged at the lower end of the charging barrel, an air outlet pipe is arranged on the barrel cover, a temperature and humidity detecting device is arranged on the air outlet pipe, the conical hopper is communicated with a communicating pipe, a temperature measuring device is arranged on the communicating pipe, and the temperature measuring device is connected with the charging barrel. The communicating pipe is communicated with a nano carbon fiber heating pipe, the nano carbon fiber heating pipe is communicated with a fan, and a controller is arranged on the nano carbon fiber heating pipe. The drying device has the beneficial effects that the carbon nanofiber heating pipe is adopted for heating air, the carbon nanofiber heating pipe is good in heat preservation performance and small in heat loss, energy consumption of the device is reduced, electric energy is saved, the service life is long, and the fault rate is small.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic injection molding, in particular to a drying device. Background Art

[0002] During the production of plastic injection molding industry, plastic particles must be dried before they can be used to produce products. Otherwise, the raw materials that are not dried will cause serious adverse reactions on the surface of plastic products, such as the appearance of material flowers (lines similar to bubbles) on the surface of the product.

[0003] At present, the heating control method of conventional plastic particle drying equipment is very power-consuming and has a high failure rate. Traditional heating tubes and temperature controllers are basically used. Although some companies are also making variable frequency energy-saving controllers to replace temperature controllers to control the work of heating tubes, the energy-saving controllers currently on the market have the problem of not being able to dry a variety of plastic materials with high moisture content, so customers dare not use them and they are of poor practicality.

[0004] Traditional heating tubes heat up slowly, have low drying efficiency, and the surface insulation of the heating tubes is not good, so a lot of heat is lost and the heating tube life is also short. The heating output of the traditional temperature controller uses an AC contactor, which has a mechanical opening and closing movement, and has a relatively high service life and failure rate. The mechanical contactor is also prone to getting stuck after being attracted and cannot be opened, resulting in uncontrolled heating due to power on. There are many examples of heating the drying barrel and catching fire. In addition, the controller has no detection of the dryness and humidity of the drying material. It completely measures the temperature of the hot air at the outlet of the heating tube to judge and control the temperature. It cannot judge the actual temperature and humidity of the plastic raw materials. This control method of drying materials has very high heating energy consumption, is unreasonable, not environmentally friendly, and has a high failure rate. Utility Model Content

[0005] The main purpose of the utility model is to provide a drying device, aiming to solve the problems of high energy consumption and high failure rate of the existing plastic particle drying devices.

[0006] In order to solve the above problems, the utility model proposes a drying device, including a barrel and a barrel cover arranged at the upper end of the barrel, and a conical bucket arranged at the lower end of the barrel, the barrel cover is provided with an air outlet pipe, the air outlet pipe is provided with a temperature and humidity detection device, the conical bucket is connected with a connecting pipe, the connecting pipe is provided with a temperature measuring device, the connecting pipe is connected with a nano-carbon fiber heating pipe, the nano-carbon fiber heating pipe is connected with a fan, and the nano-carbon fiber heating pipe is provided with a controller.

[0007] In one embodiment, the nano-carbon fiber heating tube includes an insulation tube and a plurality of glass tubes arranged in the insulation tube, and carbon fiber braided wires are arranged on the inner wall of the glass tube. The carbon fiber braided wires are connected to the terminal post, and the terminal post is arranged at one end of the insulation tube.

[0008] In one embodiment, multiple glass tubes are fixedly installed inside a heat-insulating tube through a mounting rack.

[0009] In one embodiment, protective nets are provided at both ends of the heat-insulating tube, and the terminal posts are arranged on the protective net at one end of the heat-insulating tube.

[0010] In one embodiment, the terminal posts are hermetically connected to the glass tubes.

[0011] In one embodiment, the carbon fiber braided wire is braided from nano-carbon fibers.

[0012] In one embodiment, the inside of the glass tube is in a vacuum state.

[0013] In one embodiment, a semiconductor thyristor component for controlling the power on and off of the nano-carbon fiber heating tube is provided inside the controller.

[0014] Advantageous effects: The drying device of the present application uses a nano-carbon fiber heating tube to heat air. The nano-carbon fiber heating tube has good heat preservation performance, small heat loss, which is beneficial to reducing the energy consumption of the device, saving electric energy, having a long service life, and a small failure rate;

[0015] The drying device of the present application determines the temperature and humidity of the plastic raw material by detecting the temperature and humidity of the air discharged from the outlet of the device. When the detected temperature and humidity of the plastic raw material reach the standard, the heating power of the nano-carbon fiber heating tube and the rotational speed of the fan are adjusted proportionally to ensure that the plastic material is thoroughly dried. This control method for drying materials has lower energy consumption and saves electric energy compared with the traditional control method for drying materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0017] Figure 1 is a schematic structural diagram of a drying device of the present invention;

[0018] Figure 2 is a schematic structural diagram of the nano-carbon fiber heating tube of the present invention Figure 1 ;

[0019] Figure 3 is a schematic structural diagram of the nano-carbon fiber heating tube of the present invention Figure 2 ;

[0020] Figure 4 is a schematic structural diagram of the nano-carbon fiber heating tube of the present invention Figure 3 ;

[0021] Figure 5 is the structural schematic diagram of the controller of the present utility model Figure 1 ;

[0022] Figure 6 is the structural schematic diagram of the controller of the present utility model Figure 2 .

[0023] The descriptions of the reference numerals in the drawings are as follows:

[0024] 1. Barrel; 2. Barrel cover; 3. Air outlet pipe; 4. Temperature and humidity detection device; 5. Observation window; 6. Hopper

[0025] 7. Nano-carbon fiber heating tube; 71. Mounting plate; 72. Heat insulation tube; 73. Protection net 1; 74. Protection net 2; 75. Terminal; 76. Mounting frame; 77. Glass tube

[0026] 8. Temperature measuring device; 9. Connecting pipe; 10. Controller; 11. Fan Specific embodiments

[0027] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0028] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present utility model, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0029] In the present utility model, unless otherwise clearly specified and defined, terms such as "connection" and "fixation" shall be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0030] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0031] The utility model proposes a drying device, which adopts a nano-carbon fiber heating tube 7 to heat the air. The nano-carbon fiber heating tube 7 has good thermal insulation and small heat loss, which is beneficial to reducing the energy consumption of the device, saving electricity, having a long service life and a low failure rate. In addition, the drying device judges the temperature and humidity of the plastic raw material by detecting the temperature and humidity of the air discharged from the air outlet duct 3. When it is detected that the temperature and humidity of the plastic raw material meet the standard, the heating power of the nano-carbon fiber heating tube 7 and the speed of the fan 11 are adjusted in proportion to ensure that the plastic material is thoroughly dried. Compared with the traditional control method of drying materials, this control method of drying materials has low energy consumption and saves electricity.

[0032] Specifically, in an embodiment of the utility model, as Figure 1 As shown, the drying device includes a barrel 1 and a barrel cover 2 arranged at the upper end of the barrel 1, and a cone hopper 6 arranged at the lower end of the barrel 1, the barrel cover 2 is provided with an air outlet pipe 3, the air outlet pipe 3 is provided with a temperature and humidity detection device 4, the temperature and humidity detection device 4 is used to detect the temperature and humidity of the gas at the air outlet pipe 3, and transmit the detection data to the controller 10, the cone hopper 6 is connected with a connecting pipe 9, the connecting pipe 9 is provided with a temperature measuring device 8, the temperature measuring device 8 is used to detect the temperature of the outlet hot air of the nano carbon fiber heating tube 7, and The detection data is transmitted to the controller 10, and the connecting pipe 9 is connected to the nano-carbon fiber heating tube 7. The nano-carbon fiber heating tube 7 is connected to the fan 11. After the fan 11 is started, it draws outside air into the nano-carbon fiber heating tube 7. The air heated by the nano-carbon fiber heating tube 7 leaves the nano-carbon fiber heating tube 7 and enters the connecting pipe 9. The hot air passes through the connecting pipe 9 and enters the cone hopper 6. Then the hot air enters the barrel 1 in the cone hopper 6 to dry the plastic particles in the barrel 1. Finally, the air flow is discharged from the air outlet pipe 3.

[0033] In this embodiment, if Figure 1As shown, a controller 10 is provided on the nano-carbon fiber heating tube 7, and the shape of the controller 10 is as Figure 5 and Figure 6 shown. A semiconductor thyristor component for controlling the power on and off of the nano-carbon fiber heating tube 7 is provided inside the controller 10. With this design, it is more stable and reliable than the traditional AC contactor, has a long service life, a low failure rate, accurate and effective power on and off, and a small risk of out-of-control.

[0034] In this embodiment, as Figures 2 - 4 shown, the nano-carbon fiber heating tube 7 includes a heat insulation tube 72 and a plurality of tube bodies arranged inside the heat insulation tube 72. Preferably, the tube body is a glass tube 77, and a carbon fiber braided wire is provided on the inner wall of the glass tube 77. The carbon fiber braided wire is braided from nano-carbon fibers. Using nano-carbon fibers as the heating material, the heating efficiency is high, up to 95%, so the energy consumption is lower than that of traditional heating tubes.

[0035] Of course, in other embodiments, the glass tube 77 can also be replaced by a finned tube, and the finned tube is made of metal.

[0036] In addition, the inside of the glass tube 77 is in a vacuum state. With this design, it can ensure that the heating material will not be oxidized and maintain a long service life.

[0037] In this embodiment, as Figures 2 - 4 shown, the carbon fiber braided wire is connected to a terminal 75. The terminal 75 is arranged at one end of the heat insulation tube 72. The terminal 75 is externally connected to the mains power to supply power to the carbon fiber braided wire to make it heat. The terminal 75 is hermetically connected to the glass tube 77 to maintain the vacuum state inside the glass tube 77. Protective nets are provided at both ends of the heat insulation tube 72, that is, protective net one 73 and protective net two 74. The terminal 75 is arranged on the protective net at one end of the heat insulation tube 72, that is, on the protective net two 74. With this design, the glass tube 77 inside the heat insulation tube 72 can be protected from being broken by external objects. The heat insulation tube 72 can effectively block the heat emitted by the glass tube 77 from flowing out of the heat insulation tube 72, ensuring that all the heat emitted by the glass tube 77 is used to heat the air injected into the heat insulation tube 72 by the blower 11. It has good heat preservation performance, small heat loss, which is beneficial to reducing the energy consumption of the drying device and saving electric energy.

[0038] In this embodiment, a plurality of glass tubes 77 are fixedly installed inside the heat insulation tube 72 through a mounting frame 76.

[0039] During the operation of the drying device in this embodiment, the detection data of the temperature and humidity detection device 4 and the temperature measurement device 8 are transmitted to the controller 10 in real time. The controller 10 controls and adjusts the heating power of the carbon fiber braided wire and the rotation speed and frequency of the fan 11 according to the above detection data. For example, the set humidity ratio by the controller 10 is 40% (this ratio number is adjustable). When the air flow humidity at the air outlet pipe 3 detected and fed back by the temperature and humidity detection device 4 is greater than 40%, the CPU in the controller 10 will control the full-power output of the carbon fiber braided wire, and at the same time control the fan 11 to work at full frequency and full speed to dry the plastic particles at the maximum speed. When the air flow humidity at the air outlet pipe 3 detected and fed back by the temperature and humidity detection device 4 is already lower than 40%, it indicates that the drying has reached the standard. At this time, the CPU in the controller 10 will reduce the output power of the carbon fiber braided wire to 60% of the full power output, and at the same time reduce the rotation speed and start-stop frequency of the fan 11 to achieve energy conservation as much as possible on the premise of ensuring that the plastic material is thoroughly dried. This control method of drying materials has lower energy consumption and saves electric energy compared with the traditional control method of drying materials, and can ensure that the plastic material is thoroughly dried. The control of drying materials is completely automatically and intelligently regulated by the controller 10 without manual intervention.

[0040] In this embodiment, as Figure 1 shown, an observation window 5 is provided on the barrel 1 to facilitate observing the situation inside the barrel 1.

[0041] Furthermore, to facilitate the connection between the nano-carbon fiber heating tube 7 and the fan 11, as Figures 2 - 4 shown, a mounting plate 71 is fixedly installed at one end of the heat insulation tube 72, and the mounting plate 71 is fixedly connected to the air outlet of the fan 11.

[0042] In addition, in other embodiments, a fin heating tube can also be used to replace the nano-carbon fiber heating tube 7, and the beneficial effects of the foregoing embodiments can also be achieved.

[0043] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structural transformation made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A drying device, characterized in that: It includes a barrel and a barrel cover arranged at the upper end of the barrel, and a cone bucket arranged at the lower end of the barrel, the barrel cover is provided with an air outlet pipe, the air outlet pipe is provided with a temperature and humidity detection device, the cone bucket is connected with a connecting pipe, the connecting pipe is provided with a temperature measuring device, the connecting pipe is connected with a heating pipe, the heating pipe is connected with a fan, and the heating pipe is provided with a controller.

2. A drying device according to claim 1, characterized in that: The heating tube includes a nano-carbon fiber heating tube or a fin heating tube. The nano-carbon fiber heating tube includes an insulation tube and a plurality of tube bodies arranged in the insulation tube. Carbon fiber braided wires are arranged on the inner wall of the tube body. The carbon fiber braided wires are connected to the terminal post, and the terminal post is arranged at one end of the insulation tube.

3. A drying device according to claim 2, characterized in that: Multiple pipe bodies are fixedly installed in the heat-insulating pipe through a mounting frame; The tube body comprises a glass tube or a fin tube.

4. A drying device according to claim 2, characterized in that: Both ends of the thermal insulation tube are provided with protective nets, and the terminal is arranged on the protective net at one end of the thermal insulation tube.

5. A drying device according to claim 2, characterized in that: The terminal is sealed and connected to the tube body.

6. A drying device according to claim 2, characterized in that: The carbon fiber braided filaments are woven from nano carbon fibers.

7. A drying device according to claim 2, characterized in that: The tube body is in a vacuum state.

8. A drying device according to claim 1, characterized in that: The controller is provided with a semiconductor thyristor component for controlling the on and off of the heating tube.

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