A negative pressure low temperature radio frequency drying equipment

Abstract

The present invention discloses a negative pressure low temperature radio frequency drying equipment, which belongs to the technical field of drying equipment, comprising a drying box, a frame arranged to be pulled out and arranged in the drying box, and a mesh drum for loading materials; a planetary moving mechanism is arranged on the frame, and the planetary moving mechanism comprises a bracket, a planetary moving motor, a driving gear, a driven gear, a gear ring and a star-shaped connecting plate, and the two ends of the mesh drum are connected to the inner side of the driven gear through a key, so that the mesh drum and the driven gear rotate synchronously and can slide axially along the driven gear; through the above-mentioned method, in the present invention, the mesh drum slowly revolves and rotates in the drying box, so that the drying conditions of the materials in each mesh drum are kept consistent, and the consistency of the drying effects of the same batch of materials is effectively improved; under the action of the axial floating component, the mesh drum will vibrate along its axial direction while rotating, so that when the mesh drum rotates, the materials in the mesh drum will overturn and disperse due to the shaking, thereby further improving the drying speed of the material and reducing the energy consumption of the equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of drying equipment, and in particular to negative pressure low-temperature radio frequency drying equipment. Background Art

[0002] In the fields of food, pharmaceuticals, and chemicals, microwave vacuum low-temperature drying equipment is widely used to dry materials and help protect the original characteristics of the materials.

[0003] Chinese patent CN115978913A discloses a microwave vacuum low-temperature dryer and process, including a frame and a conveyor. A drying chamber is provided on one side of the frame and an equipment chamber is provided on the other side. A drying system is provided on the inner wall of the drying chamber. The drying system includes a first drying component located on the upper part of the inner walls on both sides of the drying chamber, a second drying component located in the middle and lower parts of the inner walls on both sides of the drying chamber, and a third drying component located between the second drying component in the middle and the second drying component in the lower part. The dryer can handle a large number of stacked and high materials. However, the stacked materials will effectively reduce the drying efficiency and increase the drying time, thereby increasing the total energy consumption of the equipment.

[0004] Based on this, the present invention designs a negative pressure low temperature radio frequency drying device to solve the above problems. Summary of the Invention

[0005] In view of the above-mentioned shortcomings of the prior art, the present invention provides a negative pressure low temperature radio frequency drying device.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0007] A negative pressure low temperature radio frequency drying device, comprising a drying box, a rack arranged in the drying box and a net cylinder for loading materials;

[0008] The frame is provided with a planetary moving mechanism, which includes a bracket, a planetary moving motor, a driving gear, a driven gear, a ring gear and a star-shaped connecting plate. The two brackets are symmetrically fixed on the left and right ends of the frame, and the two brackets are provided with a ring gear on the side close to each other, and the ring gear is fixedly connected to the frame.

[0009] The upper end of the bracket is rotatably mounted with a star-shaped connecting plate and a rotating shaft through a bearing, and the star-shaped connecting plate is located outside the rotating shaft; a driving gear is fixedly mounted on the end of the rotating shaft away from the bracket; the driving gear is located inside the ring gear, and the rotating axes of the driving gear, ring gear, star-shaped connecting plate and rotating shaft are collinear;

[0010] A plurality of driven gears are distributed in a circumferential array at equal intervals between the driving gear and the ring gear, each driven gear is meshed with the driving gear and the ring gear, and each driven gear is rotatably connected to an extended end of the star-shaped connecting plate through a bearing;

[0011] The planetary moving motor is fixedly mounted on the upper end of any bracket, and the output end of the planetary moving motor is fixedly connected to the rotating shaft;

[0012] The two ends of the net cylinder are connected to the inner side of the driven gear through keys, so that the net cylinder and the driven gear rotate synchronously and can slide along the axial direction of the driven gear;

[0013] An opening and closing cover assembly is provided at one end of the net cylinder close to the drying box door, and an axial floating assembly is provided at the other end of the net cylinder for making the net cylinder rock along its axial direction during revolution and rotation.

[0014] Furthermore, the axial floating assembly includes a spring, an annular plate, a universal ball, a top block and a guide inclined surface. The spring is sleeved on the outside of the net cylinder, the annular plate is fixedly connected to the outer wall of the net cylinder, and the two ends of the spring are fixedly connected to the annular plate and the driven gear respectively.

[0015] A universal ball is provided at the end of the net cylinder; a top block is fixedly installed at one end of the bracket close to the net cylinder, and a guide inclined surface rollingly connected to the universal ball is provided on the top block.

[0016] Furthermore, the opening and closing cover assembly includes a slot, a stopper, a fixing block and a locking pin. The end of the net cylinder away from the universal ball is provided with a slot, and the stopper is plugged into the slot; the stopper moves radially along the net cylinder in the slot;

[0017] The fixing block is fixedly connected to the net cylinder, and the locking pin passes through the stop block and the fixing block along the axial direction of the net cylinder to lock and fix the stop block.

[0018] Furthermore, the frame is composed of a movable frame on the upper side and a fixed frame on the lower side, the movable frame is used to support the bracket and the ring gear; an inclination adjustment mechanism for adjusting the inclination angle of the movable frame is symmetrically provided at the left and right ends between the movable frame and the fixed frame;

[0019] The tilt adjustment mechanism includes an upper fixed rod, a lower fixed rod, a connecting rod, a guide rod, a sliding block and an adjusting cylinder. The guide rod is fixedly mounted on the upper end of the fixed frame. The sliding block is limitedly and slidably connected to the guide rod through a linear bearing, so that the sliding block can move along the length direction of the fixed frame. The adjusting cylinder is fixedly connected to the fixed frame, and the output end of the adjusting cylinder is fixedly connected to the sliding block.

[0020] The upper fixing rod is fixedly installed on the lower end of the movable frame, the lower fixing rod is fixedly connected to the sliding block, one end of the connecting rod is hinged to the upper fixing rod, and the other end of the connecting rod is hinged to the lower fixing rod.

[0021] Furthermore, the large-scale monitoring drainage auxiliary mechanism includes a transverse movement component, a longitudinal movement component and a swinging component. The transverse movement component is installed on the inner top of the drying box, and the longitudinal movement component and the swinging component are respectively installed on both sides of the moving end of the transverse movement component; the moving end of the transverse movement component is installed with a monitoring component, and the moving end of the swinging component is installed with a pipeline.

[0022] Furthermore, the transverse movement assembly includes a driving motor, a driving screw, a sliding rod, a transverse movement block and a sliding sleeve. The driving motor is fixedly connected to the outer wall of the drying box, and both ends of the driving screw and the sliding rod are rotatably connected to the inner wall of the drying box through bearings. The output end of the driving motor is fixedly connected to the driving screw; the upper side of the transverse movement block is threadedly connected to the driving screw through a threaded sleeve, and the lower side of the transverse movement block is rotatably installed with a sliding sleeve through a bearing, and the sliding sleeve is sleeved on the sliding rod.

[0023] Furthermore, the longitudinal movement assembly includes a bracket, a reciprocating screw, a roller and a track. The bracket is fixedly mounted on the upper end of the transverse movement block. The two ends of the reciprocating screw are rotatably connected to the inner side of the bracket through bearings, and the reciprocating screw and the driving screw are arranged in a cross shape; the two ends of the reciprocating screw pass through the bracket and are fixedly connected to the roller, and a track is fixedly mounted on the inner top of the drying box and is rollingly connected to the roller; the longitudinal movement block is threadedly connected to the reciprocating screw through a threaded sleeve, and is slidingly connected to the bracket.

[0024] Furthermore, the swing assembly includes a first synchronous pulley, a second synchronous pulley, a slider, a slide groove and a rocker arm. The first synchronous pulley is fixedly connected to the driving screw and is located outside the drying box. The second synchronous pulley is rotatably connected to the outer wall of the drying box through a rotating shaft. The first synchronous pulley and the second synchronous pulley are connected through a synchronous belt transmission. The slider is fixedly installed on the second synchronous pulley; one end of the rocker arm is provided with a slide groove slidably connected to the slider, and the other end of the rocker arm is fixedly connected to the slide rod; the swing block is fixedly connected to the sliding sleeve; a plurality of pipes are fixedly installed on the lower end of the swing block, and the pipes are connected to an external exhaust device for extracting evaporated water.

[0025] Furthermore, a monitoring component is fixedly installed on the longitudinal moving block, and a plurality of pipes are fixedly installed on the swinging block.

[0026] Furthermore, a plurality of silencers are provided inside the drying box.

[0027] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, after the material is loaded into the net cylinder, the frame is pushed into the inner cavity of the drying box and the hatch is closed so that the inner cavity of the drying box is sealed, and a vacuum environment is formed in the inner cavity of the drying box by the exhaust device, and then the microwave emitting device emits microwaves to continue drying the material in the drying box;

[0028] The planetary moving motor drives the driving gear to rotate slowly through the rotating shaft, so that the driving gear and the ring gear move, and the driven gear revolves around the axis of the driving gear while the driven gear rotates on its own. This makes the net cylinder revolve and rotate slowly in the drying box, so that the drying conditions of the materials in each net cylinder are consistent, effectively improving the consistency of the drying effect of the same batch of materials.

[0029] Under the action of the axial floating component, the net drum will vibrate along its axial direction while rotating. As a result, the material inside the net drum will overturn and disperse when the net drum rotates, making it easy for the evaporated water of the inner material to be discharged, thereby further improving the material drying speed, reducing the drying time and reducing the energy consumption of the equipment.

[0030] 2. The monitoring component consists of temperature sensors, humidity sensors and other sensors, which are used to continuously monitor the temperature, humidity and other conditions inside the drying box. The pipes on the longitudinal moving block move along a wavy trajectory inside the drying box, and the pipes on the swinging block swing continuously while moving horizontally, continuously draining the air from the inside of the drying box on a large scale. The operator can obtain the environmental data inside the drying box in a timely and accurate manner, so as to adjust the drying parameters in time and discharge the evaporated water in time to prevent the evaporated water from condensing on the material again. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.

[0032] Figure 1 This is a three-dimensional diagram of the front side wall of a negative pressure low-temperature radio frequency drying device hidden in the drying box of the present invention;

[0033] Figure 2 This is a front view of a negative pressure low temperature radio frequency drying device according to the present invention, wherein the front side wall of the drying box is hidden;

[0034] Figure 3 It is a partial three-dimensional diagram of a negative pressure low-temperature radio frequency drying device of the present invention;

[0035] Figure 4 for Figure 3 Enlarged view of point B in the middle;

[0036] Figure 5 is a perspective view of the axial floating assembly;

[0037] Figure 6 A three-dimensional diagram of the rack;

[0038] Figure 7It is a three-dimensional diagram of the drying oven;

[0039] Figure 8 for Figure 1 Enlarged view of point A in the middle;

[0040] Figure 9 A perspective view of the swing assembly.

[0041] The numbers in the figure represent:

[0042] 1. Drying oven; 2. Frame; 21. Movable frame; 22. Fixed frame; 23. Tilt adjustment mechanism; 231. Upper fixed rod; 232. Lower fixed rod; 233. Connecting rod; 234. Guide rod; 235. Sliding block; 236. Adjusting cylinder; 3. Planetary movement mechanism; 31. Bracket; 32. Planetary movement motor; 33. Driving gear; 34. Driven gear; 35. Ring gear; 36. Star connecting plate; 37. Rotating shaft; 4. Net cylinder; 41. Axial floating assembly; 411. Spring; 412. Ring plate; 413. Universal ball bearing; 414. Top block; 415. Guide ramp; 42. Opening and closing cover Component; 421, slot; 422, block; 423, fixed block; 424, locking pin; 5. Large-scale monitoring drainage auxiliary mechanism; 51, transverse movement component; 511, drive motor; 512, drive screw; 513, slide rod; 514, transverse movement block; 515, sliding sleeve; 52, longitudinal movement component; 521, bracket; 522, reciprocating screw; 523, roller; 524, track; 525, longitudinal movement block; 53, swing component; 531, first synchronous pulley; 532, second synchronous pulley; 533, slider; 534, slide groove; 535, swing rod; 536, swing block; 6. Monitoring component; 7. Pipeline. DETAILED DESCRIPTION

[0043] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings 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 making any creative efforts shall fall within the scope of protection of the present invention.

[0044] The terms “left,” “right,” “front,” “back,” “up,” and “down” mentioned in the following description are oriented in the viewing direction of the front view.

[0045] Example 1: In some embodiments, please refer to the accompanying drawings of the specification. Figures 1-8 A negative pressure low temperature radio frequency drying device comprises a drying box 1, a frame 2 drawn out and arranged in the drying box 1, and a net cylinder 4 for loading materials;

[0046] The drying box 1 is provided with a microwave emitting device for emitting microwaves to heat water and an exhaust device for generating negative pressure in the drying box 1; the inner cavity of the drying box 1 is an airtight and closable cavity; the right side wall of the drying box 1 is provided with an airtight and closable door;

[0047] The inner bottom of the drying box 1 is provided with a linear guide rail that is slidably connected to the frame 2;

[0048] A planetary motion mechanism 3 is provided on the frame 2. The planetary motion mechanism 3 includes a bracket 31, a planetary motion motor 32, a driving gear 33, a driven gear 34, a ring gear 35, and a star-shaped connecting plate 36. Two brackets 31 are symmetrically fixedly mounted on the left and right ends of the frame 2, and a ring gear 35 is provided on the side of the two brackets 31 close to each other. The ring gear 35 is fixedly connected to the frame 2.

[0049] A star-shaped connecting plate 36 and a rotating shaft 37 are rotatably mounted on the upper end of the bracket 31 via a bearing. The star-shaped connecting plate 36 is located outside the rotating shaft 37. A driving gear 33 is fixedly mounted on the end of the rotating shaft 37 away from the bracket 31. The driving gear 33 is located inside the ring gear 35. The rotation axes of the driving gear 33, the ring gear 35, the star-shaped connecting plate 36, and the rotating shaft 37 are collinear.

[0050] A plurality of driven gears 34 are distributed in a circumferential array at equal intervals between the driving gear 33 and the ring gear 35. Each driven gear 34 is meshed with the driving gear 33 and the ring gear 35, and each driven gear 34 is rotatably connected to an extended end of a star-shaped connecting plate 36 via a bearing.

[0051] The planetary moving motor 32 is fixedly mounted on the upper end of any bracket 31 , and the output end of the planetary moving motor 32 is fixedly connected to the rotating shaft 37 ;

[0052] The two ends of the net cylinder 4 are connected to the inner side of the driven gear 34 through a key, so that the net cylinder 4 and the driven gear 34 rotate synchronously and can slide along the axial direction of the driven gear 34;

[0053] An opening and closing cover assembly 42 is provided at one end of the net cylinder 4 close to the door of the drying box 1, and an axial floating assembly 41 is provided at the other end of the net cylinder 4 for making the net cylinder 4 rock along its axial direction during revolution and rotation.

[0054] In the present invention, after the material is loaded into the net cylinder 4, the frame 2 is pushed into the inner cavity of the drying box 1 and the door is closed to seal the inner cavity of the drying box 1. A vacuum environment is formed in the inner cavity of the drying box 1 through the exhaust device, and then the microwave emitting device emits microwaves to continue drying the material in the drying box 1.

[0055] The planetary moving motor 32 drives the driving gear 33 to rotate slowly through the rotating shaft 37, so that the driving gear 33 and the ring gear 35 move, and the driven gear 34 revolves around the axis of the driving gear 33 while the driven gear 34 rotates on its own. This causes the net drum 4 to revolve and rotate slowly in the drying box 1, so that the drying conditions of the materials in each net drum 4 are consistent, effectively improving the consistency of the drying effect of the same batch of materials.

[0056] Under the action of the axial floating component 41, the mesh drum 4 will vibrate along its axial direction while rotating, so that when the mesh drum 4 rotates, the material inside the mesh drum 4 will be overturned and dispersed, making it easy to discharge the evaporated moisture of the inner material, thereby increasing the material drying speed, reducing the drying time, and reducing the energy consumption of the equipment.

[0057] Embodiment 2: In some embodiments, as Figure 3-Figure 6 As shown in FIG. 4 , as a preferred embodiment of the present invention, the axial floating assembly 41 includes a spring 411, an annular plate 412, a universal ball 413, a top block 414, and a guide slope 415. The spring 411 is sleeved on the outside of the net cylinder 4, the annular plate 412 is fixedly connected to the outer wall of the net cylinder 4, and the two ends of the spring 411 are fixedly connected to the annular plate 412 and the driven gear 34, respectively.

[0058] The end of the net cylinder 4 is provided with a universal ball 413; the top block 414 is fixedly mounted on the end of the bracket 31 close to the net cylinder 4, and the top block 414 is provided with a guide inclined surface 415 that is rollingly connected to the universal ball 413;

[0059] In the present invention, when the net cylinder 4 rotates, the universal ball 413 at its end will pass through the top block 414, and the universal ball 413 will roll along the guide inclined surface 415 of the top block 414 to push the net cylinder 4 away. When the universal ball 413 breaks away from the top block 414, the net cylinder 4 is reset and floated under the reset action of the spring 411, so that the material in the net cylinder 4 shakes along the axial direction of the net cylinder 4, further increasing the degree of overturning of the material in the net cylinder 4 and improving the drying efficiency of the material.

[0060] The opening and closing cover assembly 42 includes a slot 421, a block 422, a fixing block 423 and a locking pin 424. A slot 421 is provided at one end of the net tube 4 away from the universal ball 413, and the block 422 is plugged into the slot 421; the block 422 moves radially along the net tube 4 in the slot 421; the opening and closing state of the end of the net tube 4 can be controlled by controlling the insertion and removal of the block 422.

[0061] The fixing block 423 is fixedly connected to the net cylinder 4 , and the locking pin 424 passes through the stop block 422 and the fixing block 423 along the axial direction of the net cylinder 4 to lock and fix the stop block 422 .

[0062] The frame 2 is composed of a movable frame 21 on the upper side and a fixed frame 22 on the lower side. The movable frame 21 is used to support the bracket 31 and the ring gear 35. An inclination adjustment mechanism 23 for adjusting the inclination angle of the movable frame 21 is symmetrically provided at the left and right ends between the movable frame 21 and the fixed frame 22.

[0063] The tilt adjustment mechanism 23 includes an upper fixed rod 231, a lower fixed rod 232, a connecting rod 233, a guide rod 234, a sliding block 235 and an adjusting cylinder 236. The guide rod 234 is fixedly mounted on the upper end of the fixed frame 22. The sliding block 235 is limitedly slidably connected to the guide rod 234 via a linear bearing, so that the sliding block 235 can move along the length direction of the fixed frame 22. The adjusting cylinder 236 is fixedly connected to the fixed frame 22, and the output end of the adjusting cylinder 236 is fixedly connected to the sliding block 235.

[0064] The upper fixing rod 231 is fixedly mounted on the lower end of the movable frame 21 , the lower fixing rod 232 is fixedly connected to the sliding block 235 , one end of the connecting rod 233 is hinged to the upper fixing rod 231 , and the other end of the connecting rod 233 is hinged to the lower fixing rod 232 ;

[0065] By adjusting the cylinder 236 to push the sliding block 235 outward, the movable frame 21 on this side can be lifted with the cooperation of the upper fixed rod 231, the lower fixed rod 232 and the connecting rod 233; if one end of the opening of the net cylinder 4 is lifted, it is convenient for the operator to load the material into the net cylinder 4; if the other end of the net cylinder 4 is lifted, it is convenient for the operator to unload the material; thus, the operator can conveniently and quickly carry out the loading and unloading operations of the material in the net cylinder 4 at the same position, which meets the demand for batch drying of materials.

[0066] Embodiment 3: In some embodiments, as Figure 2 and Figure 7-Figure 9 As shown in FIG. 5 , as a preferred embodiment of the present invention, the large-scale monitoring drainage auxiliary mechanism 5 includes a transverse movement component 51, a longitudinal movement component 52, and a swinging component 53. The transverse movement component 51 is mounted on the inner top of the drying box 1, and the longitudinal movement component 52 and the swinging component 53 are mounted on both sides of the moving end of the transverse movement component 51, respectively. The moving end of the transverse movement component 51 is mounted with a monitoring component 6, and the moving end of the swinging component 53 is mounted with a pipe 7.

[0067] The transverse movement assembly 51 includes a drive motor 511, a drive screw 512, a slide rod 513, a transverse movement block 514 and a sliding sleeve 515. The drive motor 511 is fixedly connected to the outer wall of the drying box 1. Both ends of the drive screw 512 and the slide rod 513 are rotatably connected to the inner wall of the drying box 1 through bearings. The output end of the drive motor 511 is fixedly connected to the drive screw 512. The upper side of the transverse movement block 514 is threadedly connected to the drive screw 512 through a threaded sleeve. The lower side of the transverse movement block 514 is rotatably mounted with a sliding sleeve 515 through a bearing, and the sliding sleeve 515 is sleeved on the slide rod 513.

[0068] The longitudinal movement assembly 52 includes a bracket 521, a reciprocating screw rod 522, a roller 523 and a track 524. The bracket 521 is fixedly mounted on the upper end of the transverse movement block 514. The two ends of the reciprocating screw rod 522 are rotatably connected to the inner side of the bracket 521 through bearings. The reciprocating screw rod 522 and the driving screw rod 512 are arranged in a cross shape; the two ends of the reciprocating screw rod 522 pass through the bracket 521 and are fixedly connected to the roller 523. A track 524 that is rollingly connected to the roller 523 is fixedly mounted on the inner top of the drying box 1; the longitudinal movement block 525 is threadedly connected to the reciprocating screw rod 522 through a threaded sleeve and is in close sliding connection with the bracket 521.

[0069] The swing assembly 53 includes a first synchronous pulley 531, a second synchronous pulley 532, a slider 533, a slide groove 534 and a swing rod 535. The first synchronous pulley 531 is fixedly connected to the driving screw 512 and is located outside the drying box 1. The second synchronous pulley 532 is rotatably connected to the outer wall of the drying box 1 via a rotating shaft. The first synchronous pulley 531 and the second synchronous pulley 532 are connected by a synchronous belt transmission. The slider 533 is fixedly mounted on the second synchronous pulley 532. One end of the swing rod 535 is provided with a slide groove 534 slidably connected to the slider 533, and the other end of the swing rod 535 is fixedly connected to the slide rod 513. The swing block 536 is fixedly connected to the sliding sleeve 515. Two pipes 7 are fixedly mounted on the lower end of the swing block 536, one pipe is connected to an external exhaust device for extracting evaporated water, and the other pipe is used to spray a refrigerant (such as liquid nitrogen) into the drying box 1.

[0070] In the present invention, when the large-scale monitoring drainage auxiliary mechanism 5 is in operation, the driving motor 511 drives the driving screw 512 to rotate, and the driving screw 512 drives the transverse block 514 to move horizontally in cooperation with the sliding sleeve 515 and the slide rod 513, and drives the bracket 521 to move horizontally. The roller 523 rolls on the track 524 to drive the reciprocating screw 522 to rotate, and then drives the longitudinal block 525 to move horizontally and longitudinally. At the same time, the driving screw 512 also drives the second synchronous pulley 532 to rotate through the first synchronous pulley 531. The slider 533 slides in the slide groove 534 of the swing rod 535, causing the swing rod 535 to swing back and forth. The swing rod 535 drives the slide rod 513 to swing back and forth.

[0071] A monitoring assembly 6 is fixedly mounted on the longitudinal moving block 525, and a plurality of pipes 7 are fixedly mounted on the swinging block 536. The monitoring assembly 6 is composed of sensors such as a temperature sensor and a humidity sensor, and is used to continuously monitor the temperature, humidity, and other conditions inside the drying box 1. The pipes 7 on the longitudinal moving block 525 move along a wavy trajectory inside the drying box 1, and the pipes 7 on the swinging block 536 continuously swing while moving horizontally, continuously performing large-scale drainage and refrigerant spraying operations inside the drying box 1. The operator can obtain timely and accurate environmental data inside the drying box 1, so as to adjust the drying parameters in a timely manner and discharge evaporated water in a timely manner to prevent the evaporated water from condensing again on the material. At the same time, the temperature inside the drying box 1 can be uniformly lowered.

[0072] A plurality of silencers are provided inside the drying box 1 to reduce noise during operation of the equipment.

[0073] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A negative pressure low temperature radio frequency drying device, comprising a drying box (1), a frame (2) arranged to be drawn out in the drying box (1), and a mesh drum (4) for loading materials, characterized in that: A planetary moving mechanism (3) is provided on the frame (2), and the planetary moving mechanism (3) includes a bracket (31), a planetary moving motor (32), a driving gear (33), a driven gear (34), a ring gear (35) and a star-shaped connecting plate (36). The two brackets (31) are symmetrically fixedly mounted on the left and right ends of the frame (2), and the two brackets (31) are both provided with a ring gear (35) on the side close to each other, and the ring gear (35) is fixedly connected to the frame (2); The upper end of the bracket (31) is rotatably mounted with a star-shaped connecting plate (36) and a rotating shaft (37) through a bearing, and the star-shaped connecting plate (36) is located outside the rotating shaft (37); a driving gear (33) is fixedly mounted on one end of the rotating shaft (37) away from the bracket (31); the driving gear (33) is located inside the ring gear (35), and the rotating axes of the driving gear (33), the ring gear (35), the star-shaped connecting plate (36) and the rotating shaft (37) are collinear; A plurality of driven gears (34) are distributed in a circumferential array at equal intervals between the driving gear (33) and the ring gear (35), each driven gear (34) is meshed with the driving gear (33) and the ring gear (35), and each driven gear (34) is rotatably connected to an extended end of the star-shaped connecting plate (36) via a bearing; The planetary moving motor (32) is fixedly mounted on the upper end of any bracket (31), and the output end of the planetary moving motor (32) is fixedly connected to the rotating shaft (37); Both ends of the net cylinder (4) are connected to the inner side of the driven gear (34) through a key, so that the net cylinder (4) and the driven gear (34) rotate synchronously and can slide along the axial direction of the driven gear (34); An opening and closing cover assembly (42) is provided at one end of the net cylinder (4) close to the door of the drying box (1), and an axial floating assembly (41) is provided at the other end of the net cylinder (4) for causing the net cylinder (4) to rock along its axial direction during revolution and rotation. The axial floating assembly (41) includes a spring (411), an annular plate (412), a universal ball (413), a top block (414) and a guide inclined surface (415); the spring (411) is sleeved on the outside of the net cylinder (4); the annular plate (412) is fixedly connected to the outer wall of the net cylinder (4); and the two ends of the spring (411) are fixedly connected to the annular plate (412) and the driven gear (34) respectively. A universal ball (413) is provided at the end of the net cylinder (4); a top block (414) is fixedly mounted on one end of the bracket (31) close to the net cylinder (4); a guide inclined surface (415) is provided on the top block (414) in rolling connection with the universal ball (413); The opening and closing cover assembly (42) includes a slot (421), a stopper (422), a fixing block (423) and a locking pin (424); a slot (421) is provided at one end of the net cylinder (4) away from the universal ball (413); the stopper (422) is plugged into the slot (421); the stopper (422) moves radially along the net cylinder (4) in the slot (421); The fixing block (423) is fixedly connected to the net cylinder (4), and the locking pin (424) passes through the stop block (422) and the fixing block (423) along the axial direction of the net cylinder (4) to lock and fix the stop block (422).

2. The negative pressure low temperature radio frequency drying equipment according to claim 1, characterized in that: The frame (2) is composed of an upper movable frame (21) and a lower fixed frame (22), wherein the movable frame (21) is used to support the bracket (31) and the ring gear (35); an inclination adjustment mechanism (23) for adjusting the inclination angle of the movable frame (21) is symmetrically provided at the left and right ends between the movable frame (21) and the fixed frame (22); The tilt adjustment mechanism (23) includes an upper fixed rod (231), a lower fixed rod (232), a connecting rod (233), a guide rod (234), a sliding block (235) and an adjusting cylinder (236), wherein the guide rod (234) is fixedly mounted on the upper end of the fixed frame (22), and the sliding block (235) is limitedly slidably connected to the guide rod (234) via a linear bearing, so that the sliding block (235) can move along the length direction of the fixed frame (22); the adjusting cylinder (236) is fixedly connected to the fixed frame (22), and the output end of the adjusting cylinder (236) is fixedly connected to the sliding block (235); The upper fixed rod (231) is fixedly mounted on the lower end of the movable frame (21), the lower fixed rod (232) is fixedly connected to the sliding block (235), one end of the connecting rod (233) is hinged to the upper fixed rod (231), and the other end of the connecting rod (233) is hinged to the lower fixed rod (232).

3. The negative pressure low temperature radio frequency drying equipment according to claim 2, characterized in that: The negative pressure low-temperature radio frequency drying equipment further comprises a large-scale monitoring drainage auxiliary mechanism (5), wherein the large-scale monitoring drainage auxiliary mechanism (5) comprises a transverse movement component (51), a longitudinal movement component (52) and a swing component (53), wherein the transverse movement component (51) is mounted on the inner top of the drying box (1), and the longitudinal movement component (52) and the swing component (53) are respectively mounted on both sides of the movable end of the transverse movement component (51); a monitoring component (6) is mounted on the movable end of the transverse movement component (51), and a pipe (7) is mounted on the movable end of the swing component (53).

4. The negative pressure low temperature radio frequency drying equipment according to claim 3, characterized in that: The transverse movement assembly (51) includes a driving motor (511), a driving screw rod (512), a slide rod (513), a transverse movement block (514) and a sliding sleeve (515). The driving motor (511) is fixedly connected to the outer wall of the drying box (1). Both ends of the driving screw rod (512) and the slide rod (513) are rotatably connected to the inner wall of the drying box (1) through bearings. The output end of the driving motor (511) is fixedly connected to the driving screw rod (512). The upper side of the transverse movement block (514) is threadedly connected to the driving screw rod (512) through a threaded sleeve. The lower side of the transverse movement block (514) is rotatably mounted with a sliding sleeve (515) through a bearing, and the sliding sleeve (515) is sleeved with the slide rod (513).

5. The negative pressure low temperature radio frequency drying equipment according to claim 4, characterized in that: The longitudinal movement assembly (52) includes a bracket (521), a reciprocating screw (522), a roller (523) and a track (524). The bracket (521) is fixedly mounted on the upper end of the transverse movement block (514). Both ends of the reciprocating screw (522) are rotatably connected to the inner side of the bracket (521) via bearings. The reciprocating screw (522) and the driving screw (512) are arranged in a cross shape. Both ends of the reciprocating screw (522) pass through the bracket (521) and are fixedly connected to the roller (523). The track (524) that is rollingly connected to the roller (523) is fixedly mounted on the inner top of the drying box (1). The longitudinal movement block (525) is threadedly connected to the reciprocating screw (522) via a threaded sleeve and is slidably connected to the bracket (521).

6. The negative pressure low temperature radio frequency drying equipment according to claim 5, characterized in that: The swing assembly (53) comprises a first synchronous pulley (531), a second synchronous pulley (532), a slider (533), a chute (534) and a swing rod (535). The first synchronous pulley (531) is fixedly connected to the driving screw (512) and is located outside the drying box (1). The second synchronous pulley (532) is rotatably connected to the outer wall of the drying box (1) via a rotating shaft. The first synchronous pulley (531) and the second synchronous pulley (532) are connected via a synchronous belt transmission. The slider (533) is fixedly mounted on the second synchronous pulley (532). One end of the swing rod (535) is provided with a chute (534) slidably connected to the slider (533). The other end of the swing rod (535) is fixedly connected to the slider (513). The swing block (536) is fixedly connected to the sliding sleeve (515). A plurality of pipes (7) are fixedly mounted on the lower end of the swing block (536). The pipes (7) are connected to an external air extraction device for extracting evaporated water.

7. The negative pressure low temperature radio frequency drying equipment according to claim 6, characterized in that: A monitoring assembly (6) is fixedly mounted on the longitudinal movement block (525), and two pipes (7) are fixedly mounted on the swing block (536), one pipe being connected to an external air extraction device for extracting evaporated water, and the other pipe being used for spraying a refrigerant into the drying box (1).

8. The negative pressure low temperature radio frequency drying equipment according to claim 1, characterized in that: A plurality of silencers are provided inside the drying box (1).

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