A turntable device for parallel plate type radio frequency heating system

Abstract

The present invention discloses a turntable device for a parallel-plate radio frequency heating system, the device comprises a base, the base is placed on the lower plate platform of the parallel-plate radio frequency heating system; a turntable assembly, the turntable assembly is arranged on the base and fixedly connected to the top of the base; and a traction rope, one end of the traction rope is fixedly connected to the peripheral outer wall of the turntable assembly, the traction rope is coiled around the peripheral side of the turntable assembly, and the other end of the traction rope extends straightly and is fixedly connected to the conveyor belt of the parallel-plate radio frequency heating system. The device uses the conveyor belt in the parallel-plate radio frequency heating system to provide power, and the traction rope is pulled to move by the operation of the conveyor belt, and then the traction rope drives the turntable assembly to perform a rotary motion, so that the material placed on the turntable assembly rotates, and cooperates with the parallel-plate radio frequency heating system to achieve uniform heating. The whole device has a simple structure, convenient disassembly and assembly, no additional power source is required, the cost is greatly reduced, and the practicality is stronger.

Description

Technical Field

[0001] The present invention relates to the technical field of radio frequency heating auxiliary equipment, and more particularly to a turntable device for a parallel plate type radio frequency heating system. Background Art

[0002] At present, radio frequency heating technology, as a new type of modern heat treatment technology, is widely used in many fields such as drying, pest control, sterilization, cooking, and thawing of food and agricultural products due to its advantages such as rapid overall heating, selective heating, deep penetration, and non-ionization. The parallel plate radio frequency heating system is the most widely used radio frequency heating system. During the heating process, the material is placed between two parallel plates, and the heating power in the material can be changed by adjusting the vertical distance between the two electrodes. The material can pass through the radio frequency field with the help of the movement of the conveyor belt to achieve the purpose of continuous heating. However, due to the inherent electromagnetic field unevenness effect, selective heating effect, material shape effect, and corner effect of dielectric heating technology, radio frequency heating inevitably has the phenomenon of uneven heating, which seriously affects the industrial application of radio frequency heating technology.

[0003] In order to solve the problem of uneven heating in parallel plate RF heating systems, many methods to improve heating uniformity have emerged, such as symmetrically arranging inductors at the position of the upper plate to improve the heating uniformity of the material, improving the heating uniformity of the material through pulsed energy supply, improving the uniformity of RF energy distribution inside the material through conveyor belt movement, and improving the uniformity of RF heating by changing the medium around the material. However, the above methods are not very ideal for improving the uneven RF heating phenomenon, are costly, and have certain limitations, and cannot be promoted in the heat treatment of a variety of foods or agricultural products.

[0004] Therefore, how to provide a device that is more practical, less costly, simpler and more convenient to improve the uniformity of material heating is an urgent problem that needs to be solved by those skilled in the art. Summary of the invention

[0005] In view of this, the present invention provides a turntable device for a parallel-plate RF heating system, which utilizes the conveyor belt drive of the parallel-plate RF heating system to realize the rotational movement of the material placed on the turntable, thereby solving the problems of the existing methods for improving the uniformity of RF heating being unsatisfactory in effect, high in cost, and low in applicability.

[0006] In order to achieve the above object, the present invention adopts the following technical solution:

[0007] A turntable device for a parallel plate type radio frequency heating system, the device comprising:

[0008] A base, the base being placed on a lower plate platform of a parallel plate type radio frequency heating system;

[0009] a turntable assembly, the turntable assembly being disposed on the base and fixedly connected to the top of the base; and

[0010] A traction rope, one end of which is fixedly connected to the outer wall of the turntable assembly, the traction rope is coiled around the turntable assembly, and the other end of the traction rope extends straight and is fixedly connected to the conveyor belt of the parallel plate type radio frequency heating system.

[0011] The beneficial effects of the present invention are as follows: the device utilizes the conveyor belt in the parallel-plate radio frequency heating system to provide power, and the conveyor belt operation pulls the traction rope to move, and then the traction rope drives the turntable assembly to rotate, thereby rotating the material placed on the turntable assembly, and cooperating with the parallel-plate radio frequency heating system to achieve uniform heating. The entire device has a simple structure, is easy to disassemble and assemble, does not require an additional power source, greatly reduces costs, and is more practical.

[0012] Furthermore, the turntable assembly includes an upper plate and a lower plate, the upper plate is buckled on the lower plate and rotatably connected to the lower plate, and the lower plate is fixedly connected to the base.

[0013] Furthermore, a plurality of balls are provided between the upper plate and the lower plate, a retaining frame is provided on the top of the lower plate, a positioning portion is provided at the bottom of the upper plate opposite to the retaining frame, the balls are placed on the retaining frame and arranged in the positioning portion, and the upper plate and the lower plate are rotatably connected via the balls.

[0014] When the turntable assembly of the present invention is working, the lower plate is fixed and the upper plate rotates relative to the lower plate. The upper plate is also larger in size than the lower plate. Both the upper plate and the lower plate are in a pancake shape. The center of the upper plate corresponds to the center of the lower plate, and the rotation is more stable.

[0015] Furthermore, the balls are made of silicon nitride ceramic material. Not only the balls, but all parts of the entire turntable device are made of no metal material, which has no effect on the electromagnetic field during the radio frequency heating process, and can ensure the normal operation of the parallel plate radio frequency heating system while realizing the material rotation function.

[0016] Furthermore, a rope winding part is provided on the circumference of the upper disk, and the traction rope is wound in the rope winding part. The arrangement of the rope winding part can gather the wound traction rope to prevent the traction rope from being scattered during the winding process. Since the traction rope needs to drive the upper disk to rotate through friction when moving with the conveyor belt, the rope winding part can be made of non-metallic material with high friction.

[0017] Furthermore, the base includes a bottom plate, a fixed plate and two bases, the two bases are symmetrically arranged on both sides of the bottom of the bottom plate, the base is fixedly connected to the bottom of the bottom plate, the fixed plate is fixedly installed on the bottom plate, and the turntable assembly is arranged on the top of the fixed plate and fixedly connected to the fixed plate.

[0018] Furthermore, an end baffle is provided on one end of the base away from the bottom plate, the end baffle is arranged vertically, one end of the end baffle is fixedly connected to the end of the base, and the other end thereof extends downward.

[0019] Furthermore, a side baffle is provided on the outer side wall of the base, one end of the side baffle is fixedly connected to the outer side wall of the base, and the other end thereof extends downward.

[0020] Since the entire rotating device needs to be placed on the lower plate platform of the parallel plate type RF heating system during use, in order to prevent the rotating device from deviating during operation, the present invention provides end baffles and side baffles, which can apply a certain clamping force to the entire device to avoid relative displacement and affect normal operation.

[0021] Furthermore, a rope seat is provided at the top of the bottom plate near the turntable assembly, and the other end of the traction rope passes through the rope seat and is fixedly connected to the conveyor belt of the parallel plate type radio frequency heating system. The setting of the rope seat positions and constrains the extended part of the traction rope, which can prevent the traction rope from deviating during the movement and ensure that the traction rope can extend in a straight line. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0023] Figure 1 A schematic diagram of the overall structure of a turntable device for a parallel-plate radio frequency heating system provided by the present invention;

[0024] Figure 2 It is a schematic cross-sectional view of a part of the structure of the turntable assembly in an embodiment of the present invention;

[0025] Figure 3 Schematic diagram of the bottom structure of the turntable assembly in an embodiment of the present invention;

[0026] Figure 4 Schematic diagram of the three-dimensional structure of the base in an embodiment of the present invention;

[0027] Figure 5 is a side schematic diagram of a base in an embodiment of the present invention;

[0028] Figure 6 It is a schematic diagram of the use state of the turntable device after being installed in the parallel plate type radio frequency heating system in the embodiment of the present invention;

[0029] Figure 7 Schematic diagram of the installation relationship between the turntable device and the lower plate platform in the embodiment of the present invention;

[0030] Figure 8 Schematic diagram of the connection relationship between the traction rope and the conveyor belt in an embodiment of the present invention. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] See attached Figure 1 The embodiment of the present invention discloses a turntable device for a parallel plate type radio frequency heating system, the device comprising:

[0033] A base 1, the base 1 is placed on a lower plate platform 4 of a parallel plate type radio frequency heating system;

[0034] A turntable assembly 2, which is disposed on the base 1 and fixedly connected to the top of the base 1; and

[0035] The traction rope 3 has one end fixedly connected to the peripheral outer wall of the turntable assembly 2, the traction rope 3 is coiled around the peripheral side of the turntable assembly 2, and the other end of the traction rope 3 extends straight and is fixedly connected to the conveyor belt 5 of the parallel plate type radio frequency heating system.

[0036] Specifically, see Appendix Figure 2 The turntable assembly 2 includes an upper plate 21 and a lower plate 22 . The upper plate 21 is buckled on the lower plate 22 and rotatably connected to the lower plate 22 . The lower plate 22 is fixedly connected to the base 1 .

[0037] Specifically, a plurality of balls 23 are provided between the upper plate 21 and the lower plate 22, a retaining frame 24 is provided on the top of the lower plate 22, a positioning portion 25 is provided at the bottom of the upper plate 21 opposite to the retaining frame 24, the balls 23 are placed on the retaining frame 24 and arranged in the positioning portion 25, and the upper plate 21 and the lower plate 22 are rotatably connected through the balls 23.

[0038] In this embodiment, eight balls 23 are arranged between the upper plate 21 and the lower plate 22, so that the upper plate 21 can rotate freely relative to the lower plate 22. At the same time, the center of the upper plate 21 corresponds to the center of the lower plate 22. Figure 3 A gasket 27 and a nylon screw 28 are provided at the center of the lower plate 22. The nylon screw 28 is fixedly installed at the center of the bottom of the upper plate 21. The nylon screw 28 extends downward through the center of the lower plate 22 to below it and is fixed by the gasket 27, thereby connecting the center of the upper plate 21 and the lower plate 22, ensuring that the upper plate will not deviate during the rotation relative to the lower plate 22.

[0039] Preferably, all parts of the turntable device in this embodiment are made of non-metallic materials, among which the ball 23 is made of silicon nitride ceramic material, and the remaining parts are made of polypropylene or nylon material. This will not have any effect on the electromagnetic field during the RF heating process, thereby avoiding the situation where the electromagnetic field distribution during the RF heating process is poor.

[0040] Specifically, a rope winding portion 26 is provided on the circumference of the upper disk 21, and the traction rope 3 is wound in the rope winding portion 26. In this embodiment, the rope winding portion 26 is sleeved on the outer circumference of the upper disk 21, and the middle part of the rope winding portion 26 is groove-shaped, and the traction rope 3 is wound in the groove.

[0041] Specifically, see Appendix Figure 4 and Figure 5 The base 1 includes a bottom plate 11, a fixing plate 12 and two bases 13. The two bases 13 are symmetrically arranged on both sides of the bottom of the bottom plate 11. The bases 13 are fixedly connected to the bottom of the bottom plate 11. The fixing plate 12 is fixedly installed on the bottom plate 11. The turntable assembly 2 is arranged on the top of the fixing plate 12 and is fixedly connected to the fixing plate 12. In this embodiment, the fixing plate 12 and the lower plate 22 are both in the shape of round cakes and have similar sizes. The lower plate 22 and the fixing plate 12 are connected by interference fit. The center of the fixing plate 12 is provided with a mounting hole, so that when the lower plate 22 is installed on the fixing plate 12, the mounting hole can accommodate the tail of the nylon screw 28 and the gasket 27 at the center of the bottom of the lower plate.

[0042] More preferably, in order to ensure that the entire device does not affect the normal operation of the conveyor belt 5 after installation, the distance between the two bases 13 needs to be greater than the width of the conveyor belt 5 .

[0043] More preferably, an end baffle 14 is further provided on one end of the base 13 away from the bottom plate 11 . The end baffle 14 is arranged vertically, one end of the end baffle 14 is fixedly connected to the end of the base 13 , and the other end thereof extends downward.

[0044] More preferably, a side baffle 15 is further provided on the outer side wall of the base 13 , one end of the side baffle 15 is fixedly connected to the outer side wall of the base 13 , and the other end thereof extends downward.

[0045] Since the lower pole plate platform 4 is a protruding rectangular block, and the only external force applied to the entire turntable device is the pulling of the traction rope to the left, the turntable device is installed directly on the lower pole plate platform 4, and the lateral displacement is limited by the side baffle 15, and the end baffle 14 contacts the lower pole plate platform 4 to limit the traction rope 3 from driving the turntable device to slide.

[0046] More preferably, a rope seat 16 is provided at the top of the bottom plate 11 near the turntable assembly 2, and the other end of the traction rope 3 passes through the rope seat 16 and is fixedly connected to the conveyor belt 5 of the parallel plate type radio frequency heating system.

[0047] See attached Figure 6 and Figure 7 The rotating device a disclosed in this embodiment is installed between the upper plate and the lower plate platform 4 of the parallel plate type RF heating system, placed on the lower plate platform 4, and is limited by contact with the lower plate platform 4 through the end baffle 14 and the side baffle 15. The conveyor belt 5 is an inherent component in the parallel plate type RF heating system, located on the lower plate platform 4 in the RF cavity, and can be driven by the RF heating system motor.

[0048] like Figure 8 As shown, the conveyor belt 5 is a mesh structure, the traction rope 3 can pass through the mesh holes on the conveyor belt 5 to be fixed to the conveyor belt 5, and the driving force required for the turntable assembly 2 to drive the material is extremely small, so the traction rope 3 can be used to pass through multiple mesh holes on the conveyor belt 5, and then fixed to the conveyor belt 5 by friction, without affecting the operation of the conveyor belt 5, and can also be directly fixed by binding.

[0049] When the conveyor belt 5 moves, the traction rope 3 is driven to move, and the traction rope 3 drives the upper plate 21 of the turntable device a to perform a rotary motion. The turntable device a uses the traction rope 3 and the turntable assembly 2 to convert the linear motion of the conveyor belt 5 in the parallel plate type RF heating system into the rotary motion of the upper plate 21. Thus, the rotation of the material to be processed during the heating process is achieved, and the uniformity of RF heating is improved.

[0050] The entire turntable device does not require an external power device, and uses the movement of the conveyor belt 5 of the parallel plate type radio frequency heating system as a power source. Therefore, the rotation speed of the upper disk 21 can be adjusted by the speed of the conveyor belt 5 in the radio frequency heating system.

[0051] In actual application, it is only necessary to install the assembled turntable device a as a whole on the lower electrode platform 4 in the heating chamber, and pass the external end of the traction rope 3 through the multiple mesh holes on the conveyor belt 5 to fix it on the conveyor belt 5. When radio frequency heating the material, the material is placed on the upper plate 21 of the turntable device a, and the belt speed of the conveyor belt 5 is set appropriately to achieve it.

[0052] Among them, the belt speed v (m / h) is determined according to the heating time t (h), and the specific numerical calculation formula is:

[0053] v=90 / t.

[0054] In summary, the above-mentioned turntable device provided by the embodiment of the present invention has the following advantages compared with the prior art:

[0055] 1. Material containers of various specifications and sizes can be placed on the upper plate, which has a wider range of applications;

[0056] 2. The entire device is made of non-metallic materials, which does not affect the ionization effect of the original radio frequency electromagnetic field;

[0057] 3. The turntable device has a simple structure and is easy to install and disassemble. It uses the conveyor belt in the radio frequency heating system as a power source, which is lower in cost;

[0058] 4. The material is rotated by the turntable device, which effectively improves the uneven heating phenomenon of the parallel plate RF heating system.

[0059] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0060] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A turntable device for a parallel plate type radio frequency heating system, characterized in that: include: A base (1), the base (1) being placed on a lower plate platform (4) of a parallel plate type radio frequency heating system; A turntable assembly (2), the turntable assembly (2) being arranged on the base (1) and fixedly connected to the top of the base (1); as well as A traction rope (3), one end of which is fixedly connected to the outer wall of the circumference of the turntable assembly (2), the traction rope (3) is coiled around the circumference of the turntable assembly (2), and the other end of the traction rope (3) extends straight and is fixedly connected to the conveyor belt (5) of the parallel plate type radio frequency heating system; The turntable assembly (2) comprises an upper plate (21) and a lower plate (22), wherein the upper plate (21) is buckled on the lower plate (22) and is rotatably connected to the lower plate (22), and the lower plate (22) is fixedly connected to the base (1); A plurality of balls (23) are provided between the upper plate (21) and the lower plate (22); a retaining frame (24) is provided on the top of the lower plate (22); a positioning portion (25) is provided at the bottom of the upper plate (21) at a position opposite to the retaining frame (24); the balls (23) are placed on the retaining frame (24) and arranged in the positioning portion (25); the upper plate (21) and the lower plate (22) are rotatably connected via the balls (23); The ball (23) is made of silicon nitride ceramic material; A rope winding portion (26) is provided on the circumferential side of the upper disk (21), and the traction rope (3) is wound inside the rope winding portion (26).

2. The turntable device for a parallel plate type radio frequency heating system according to claim 1, characterized in that: The base (1) comprises a bottom plate (11), a fixing plate (12) and two bases (13); the two bases (13) are symmetrically arranged on two sides of the bottom of the bottom plate (11); the bases (13) are fixedly connected to the bottom of the bottom plate (11); the fixing plate (12) is fixedly mounted on the bottom plate (11); and the turntable assembly (2) is arranged on the top of the fixing plate (12) and is fixedly connected to the fixing plate (12).

3. The turntable device for a parallel plate type radio frequency heating system according to claim 2, characterized in that: An end baffle (14) is also provided on one end of the base (13) away from the bottom plate (11); the end baffle (14) is arranged vertically, one end of the end baffle (14) is fixedly connected to the end of the base (13), and the other end thereof extends downward.

4. The turntable device for a parallel plate type radio frequency heating system according to claim 2, characterized in that: A side baffle (15) is also provided on the outer side wall of the base (13), one end of the side baffle (15) is fixedly connected to the outer side wall of the base (13), and the other end thereof extends downward.

5. The turntable device for a parallel plate type radio frequency heating system according to claim 2, characterized in that: A rope seat (16) is also provided at the top of the bottom plate (11) near the turntable assembly (2), and the other end of the traction rope (3) passes through the rope seat (16) and is fixedly connected to the conveyor belt (5) of the parallel-plate radio frequency heating system.

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