Vacuum microwave device for drying glass fiber yarns

Abstract

The utility model belongs to the technical field of glass fiber production equipment, and particularly relates to a vacuum microwave device for drying glass fiber yarn. The microwave oven comprises a microwave box body, an insulating layer, a microwave generator, a waveguide tube and a vacuum generator, the thermal insulation layer wraps the microwave box body, the microwave generator and the vacuum generator are arranged on the microwave box body, and the waveguide tube is arranged in the microwave box body and connected to the microwave generator. According to the vacuum microwave device for drying the glass fiber yarn, through the liftable vacuum microwave box with the waveguide tube, the energy utilization efficiency of microwaves can be improved, and the field microwave installed power and the arrangement point number are reduced; meanwhile, the width and the size of the drying furnace can be reduced through lifting motion, and the productivity of a workshop is guaranteed as much as possible.

Description

Technical Field

[0001] This application belongs to the technical field of glass fiber production equipment, specifically relating to a vacuum microwave device for drying glass fiber yarn. Background Technology

[0002] Drying is one of the important processes in the production of fiberglass yarn, which directly affects the surface morphology and technical performance of the finished fiberglass yarn.

[0003] Existing drying ovens using microwave-assisted heating often employ a wide area of ​​microwave arrays to maximize heating efficiency, resulting in high total microwave power and energy waste. This is particularly problematic for factories with power consumption restrictions, where microwaves may not be usable. Therefore, it is necessary to design a drying oven microwave structure with lower total microwave power while still fully utilizing microwave-assisted heating to achieve better heating or curing of yarn bundles. Utility Model Content

[0004] In view of this, this application provides a vacuum microwave device for drying fiberglass yarn to solve all or part of the technical problems described in the background section of this application.

[0005] The innovative concept of this application is to improve the energy utilization rate of microwaves and reduce the power and number of microwave installation points on site by using a liftable vacuum microwave box with waveguides; at the same time, it reduces the width and volume of the drying oven to ensure the production capacity of the workshop as much as possible.

[0006] The solution provided in this application to resolve its technical problem is as follows:

[0007] A vacuum microwave device for drying fiberglass yarn is characterized by comprising a microwave enclosure, an insulation layer, a microwave generator, and a waveguide; the insulation layer covers the outside of the microwave enclosure, the microwave generator is disposed on the microwave enclosure, and the waveguide is disposed inside the microwave enclosure and connected to the microwave generator.

[0008] A microwave generator can emit microwaves, a waveguide can conduct microwaves from the microwave generator into the microwave enclosure, and a vacuum generator can evacuate the microwave enclosure.

[0009] Preferably, the vacuum microwave device for drying fiberglass yarn also includes a vacuum generator; the vacuum generator is mounted on the microwave chamber and is used to evacuate the microwave chamber.

[0010] Preferably, the microwave enclosure has a structure that is sealed at the top and sides but open at the bottom.

[0011] Preferably, the microwave enclosure includes a top frame and four side frames; the four side frames are arranged around the top frame to form a structure that is sealed at the top and sides but open at the bottom; an insulation layer is arranged on the outside of the top frame and side frames to form a sealed insulation structure except for the bottom opening.

[0012] Preferably, the bottom of the microwave oven is equipped with a sealing strip. When the microwave oven is lowered onto the drying oven floor or worktable, the sealing strip forms a seal to ensure the drying effect.

[0013] Preferably, the vacuum microwave apparatus for drying fiberglass yarn further includes a lifting furnace door; the lifting furnace door is located on the side of the microwave enclosure and is fixedly connected to the microwave enclosure. More preferably, the vacuum microwave apparatus for drying fiberglass yarn further includes a door frame; the lifting furnace door is slidably disposed within the door frame.

[0014] The furnace door frame is set at the entrance of the fiberglass yarn drying oven, and the lifting furnace door is set within the door frame defined by the furnace door frame. When the microwave oven moves up and down, the lifting furnace door can rise with the microwave oven to open the furnace door or fall with the microwave oven to close the furnace door.

[0015] Preferably, the vacuum microwave device for drying fiberglass yarn also includes a power cylinder; the power cylinder is driven to the microwave enclosure. The power cylinder can drive the microwave enclosure to move up and down. More preferably, the power cylinder can be a hydraulic cylinder or a pneumatic cylinder.

[0016] Preferably, the microwave enclosure can also be driven by a lifting mechanism consisting of a drive motor. The lifting mechanism includes a lifting motor, a lifting sprocket, a transmission chain, and a counterweight. The lifting motor and the lifting sprocket are mounted on the furnace door frame, and the lifting motor is driven to the lifting sprocket. The transmission chain is mounted on the lifting sprocket and its two ends are respectively connected to the microwave enclosure and the counterweight.

[0017] After the lifting motor is started, it can drive the microwave cabinet to rise or fall through the lifting sprocket. The counterweight is used to increase the stability of the lifting movement and reduce the power consumption of the lifting motor.

[0018] Preferably, one end of the waveguide is used to connect to the microwave generator, and the other end of the waveguide is located at the bottom of the microwave enclosure. Delivering microwave energy to the bottom space of the yarn cart or yarn bundle via the waveguide helps improve energy utilization efficiency.

[0019] Preferably, each microwave oven can be equipped with 4-8 microwave generators. The microwave generators are evenly distributed around the edge or center of the microwave oven, surrounding the yarn cart or yarn bundle, which helps to increase the uniformity of heating and improve drying efficiency.

[0020] Beneficial technical effects:

[0021] The vacuum microwave device for drying fiberglass yarn provided in this application can improve the energy utilization rate of microwaves and reduce the power and number of microwave installation points on site through a liftable vacuum microwave box with waveguides; at the same time, it can also reduce the width and volume of the drying oven through lifting movement, so as to ensure the production capacity of the workshop as much as possible.

[0022] The technical solution and technical effects of this application will be described in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0023] Figure 1 Front view of a vacuum microwave device;

[0024] Figure 2 Side view of a vacuum microwave device;

[0025] Figure 3 Front view of the first lifting method;

[0026] Figure 4 Side view of the first lifting method;

[0027] Figure 5 : Schematic diagram of the second lifting method;

[0028] Icon description:

[0029] 1-Microwave enclosure, 2-Insulation layer, 3-Microwave generator, 4-Waveguide, 5-Vacuum generator, 6-Lifting furnace door, 7-Furnace door frame, 8-Power cylinder, 9-Lifting mechanism;

[0030] 11-Top frame of the container, 12-Side frame of the container, 13-Sealing strip,

[0031] 91-Lifting motor, 92-Lifting sprocket, 93-Transmission chain, 94-Counterweight. Detailed Implementation

[0032] Please see Figure 1 and Figure 2 The vacuum microwave device for drying fiberglass yarn includes a microwave enclosure 1, an insulation layer 2, a microwave generator 3, a waveguide 4, and a vacuum generator 5.

[0033] The microwave enclosure 1 includes a top frame 11 and four side frames 12. The four side frames 12 are arranged around the top frame 11, forming a sealed structure with a closed top and sides but an open bottom. An insulation layer 2 is arranged on the outside of the top frame 11 and the side frames 12, forming a sealed insulation structure except for the bottom. A sealing strip 13 is provided around the bottom opening of the side frames 12, which is also the bottom opening of the microwave enclosure.

[0034] When the microwave oven 1 is lowered onto the floor or worktable of the drying oven, a sealing structure can be formed by the sealing strip 13 to ensure the preheating or drying effect.

[0035] A microwave generator 3 is mounted on a microwave enclosure 1, and a waveguide 4 is mounted inside the microwave enclosure 1 and connected to the microwave generator 3. One end of the waveguide 4 is used to connect to the microwave generator 3, and the other end of the waveguide 4 is located at the bottom of the microwave enclosure 1.

[0036] Microwave generator 3 emits microwaves, and waveguide 4 conducts the microwaves from microwave generator 3 to the bottom of microwave enclosure 1. Conducting microwave energy to the bottom space of the yarn machine or yarn ball through waveguide 4 helps improve the utilization efficiency of microwave energy.

[0037] The vacuum generator 5 is installed on the microwave enclosure 1 and is connected to the inner cavity of the microwave enclosure 1 through a pipe, which can evacuate the microwave enclosure.

[0038] Each microwave oven 1 can be equipped with 4-8 microwave generators 3. The microwave generators 3 are evenly distributed around the edge or middle of the microwave oven 1, surrounding the yarn cart or yarn ball, which helps to increase the heat uniformity of the yarn ball and improve drying efficiency.

[0039] The vacuum microwave device disclosed in this application is used to heat fiberglass yarn to improve its drying efficiency after entering the drying oven. Thus, after being preheated by the vacuum microwave device, the yarn carts sequentially enter the fiberglass yarn drying oven. To ensure seamless process transitions, an automatic lifting door is installed between the vacuum microwave device and the drying oven to ensure a sealed and heat-insulating connection. Simultaneously, to save floor space and reduce the oven's volume, a lifting device is used to drive the automatic lifting of the microwave enclosure 1. After each yarn cart is preheated, the microwave enclosure 1 rises while simultaneously opening the oven door to allow the yarn cart to enter. Then, the microwave enclosure 1 descends to the ground while closing the oven door to heat the next yarn cart.

[0040] Therefore, the vacuum microwave device for drying fiberglass yarn also includes a door frame 7 and a lifting door 6. The door frame 6 is located at the entrance of the drying oven and has a lifting frame structure. The lifting door 6 is slidably mounted on the door frame 6. The lifting door 6 is located on the side of the microwave enclosure 1 and is fixedly connected to the microwave enclosure 1. When the microwave enclosure 1 moves up and down, the lifting door 6 can rise with the microwave enclosure 1 to open the oven door or fall with the microwave enclosure 1 to close the oven door.

[0041] Various lifting devices can be used to drive the lifting of the microwave enclosure 1. Please refer to [link / reference]. Figure 3 and Figure 4The lifting device can be a power cylinder 8 (hydraulic cylinder or pneumatic cylinder), which is connected to the microwave enclosure 1. When the piston rod of the power cylinder 8 extends or retracts from the cylinder, it drives the microwave enclosure 1 and the lifting furnace door 6 to move upward or downward together.

[0042] In a modified implementation, a lifting mechanism 9, consisting of a drive motor, can also be used to drive the lifting of the microwave enclosure 1. Please refer to [link / reference needed]. Figure 5 The lifting mechanism 9 includes a lifting motor 91, a lifting sprocket 92, a transmission chain 93, and a counterweight 94. The lifting motor 91 and the lifting sprocket 92 are mounted on the furnace door frame 6, and the lifting motor 91 is driven by the lifting sprocket 92. The transmission chain 93 is mounted on the lifting sprocket 92 and its two ends are connected to the microwave enclosure 1 and the counterweight 94, respectively. After the lifting motor 91 is started, it can drive the microwave enclosure 1 to rise or fall through the lifting sprocket 92. The counterweight 94 is used to increase the stability of the lifting movement and reduce the power consumption of the lifting motor 91.

[0043] Implementation principle and technical effects:

[0044] The microwave oven 1 is initially raised, and the yarn cart enters the heating zone below the microwave oven 1. The power cylinder 8 or the lifting motor 91 is activated, driving the microwave oven 1 and the lifting furnace door 6 to descend together. The microwave oven 1 seals and covers the yarn cart, and the lifting furnace door 6 seals the drying oven. At the same time, the microwave generator 3 and the vacuum generator 5 are activated, the microwave oven 1 is evacuated, and the waveguide 4 conducts microwaves into the cavity of the microwave oven 1. After heating is completed, the power cylinder 8 or the lifting motor 91 is activated, raising the microwave oven 1 and the lifting furnace door 6. The heated yarn cart passes through the furnace door frame 7 and enters the drying oven, such as a tunnel oven. The yarn cart waiting to be heated enters the heating zone below the microwave oven 1. This cycle is repeated for continuous production.

[0045] As can be seen from the above description, the vacuum microwave device for drying fiberglass yarn provided in this application has high energy utilization efficiency because the waveguide can conduct microwaves to the bottom of the sealed vacuum cavity and surround the yarn cart. This reduces the power of the microwave equipment and the number of installation points on site. Because the microwave vacuum box can move upward to avoid emptying the yarn cart's travel space and can also move downward to form a heating zone to microwave heat the yarn cart, the width and volume of the drying oven can be reduced, thus maximizing the workshop's production capacity.

[0046] The technical solutions and effects of this application have been described in detail above with reference to the accompanying drawings and specific embodiments. It should be noted that those skilled in the art can develop other embodiments based on this. Any simple modifications and equivalent substitutions that do not depart from the innovative concept of this application are covered by this application and fall within the protection scope of this application.

Claims

1. A vacuum microwave device for drying glass yarn, characterized in that: it comprises a microwave box (1), a heat preservation layer (2), a microwave generator (3), and a waveguide (4); the heat preservation layer (2) is wrapped outside the microwave box (1), the microwave generator (3) is arranged on the microwave box (1), and the waveguide (4) is arranged in the microwave box (1) and connected to the microwave generator (3); the vacuum microwave device for drying glass yarn further comprises a lifting furnace door (6), a furnace door frame (7), and a power cylinder (8); the lifting furnace door (6) is arranged on the side of the microwave box (1) and fixedly connected to the microwave box (1); the lifting furnace door (6) is slidingly arranged in the furnace door frame (7); and the power cylinder (8) is drivingly connected to the microwave box (1).

2. The vacuum microwave device for drying glass yarn according to claim 1, characterized in that: the vacuum microwave device for drying glass yarn further comprises a vacuum generator (5); and the vacuum generator (5) is arranged on the microwave box (1) and used for vacuumizing the microwave box (1).

3. The vacuum microwave device for drying glass yarn according to claim 1, characterized in that: the microwave box (1) has a structure of being sealed at the top and the side but open at the bottom.

4. The vacuum microwave device for drying glass yarn according to claim 3, characterized in that: the microwave box (1) comprises a box top frame (11) and four box side frames (12); the four box side frames (12) are arranged around the box top frame (11) to form the structure of being sealed at the top and the side but open at the bottom; and the heat preservation layer (2) is arranged outside the box top frame (11) and the box side frames (12).

5. The vacuum microwave device for drying glass yarn according to claim 3, characterized in that: the bottom of the microwave box (1) is provided with a sealing strip (13).

6. The vacuum microwave device for drying glass yarn according to claim 1, characterized in that: one end of the waveguide (4) is used for connecting the microwave generator (3), and the other end of the waveguide (4) is arranged at the bottom of the microwave box (1). ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

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