Automatic vacuum drying equipment and drying method

Abstract

The invention relates to the technical field of vacuum drying, and discloses automatic vacuum drying equipment and a drying method.A vacuum drying oven, a vacuum device, a heating device, a rack automatic trolley and a transfer device are combined, all the parts are integrated through a control device, and the rack automatic trolley is used for achieving material feeding; loading of the vacuum drying oven is achieved through the transfer device, evacuation of the vacuum drying oven is achieved through the vacuum device, drying and cooling of the vacuum drying oven are achieved through the heating device, aeration of the vacuum drying oven is achieved through the aeration valve, and discharging of the vacuum drying oven is achieved through the transfer device. The full-process automatic vacuum drying operation of automatic material filling, automatic door closing and evacuation, automatic exposure and door opening and automatic discharging is achieved, and the full-process automatic vacuum drying device has the advantages of being high in automation degree, high in efficiency and high in safety.

Description

Technical Field

[0001] The invention relates to the technical field of vacuum drying and discloses automatic vacuum drying equipment and a drying method. Background Art

[0002] In fields such as metal smelting and chemical engineering, drying wet or washed materials is a common operation. Some easily oxidizable materials require drying in a vacuum oven to prevent oxidation at high temperatures. In existing traditional production workshops, vacuum ovens are often manually operated, and the drying process involves manual door opening and closing, vacuuming and airing, loading and unloading. This method presents challenges such as high labor intensity and low efficiency. Loading and unloading operations, in particular, are physically demanding and inefficient. Some workplaces also involve high temperatures, dust, poor air quality, and other conditions that are unsuitable for human operation.

[0003] To solve this problem, it is necessary to develop an automatic vacuum drying equipment and drying method to realize full-process automatic drying operations. Summary of the Invention

[0004] The purpose of the present invention is to provide an automatic vacuum drying equipment and drying method, which can realize the full-process automatic vacuum drying operation of automatic material loading, automatic door closing and vacuuming, automatic exposure and door opening, and automatic material discharging, and has the technical characteristics of high degree of automation, high efficiency and high safety.

[0005] In order to achieve the above technical effects, the technical solution adopted by the present invention is:

[0006] An automatic vacuum drying device, comprising:

[0007] A vacuum oven, comprising a box body and an automatically openable door, the vacuum oven being provided with an air release valve, and a plurality of layers of pull-out drying trays being provided inside the vacuum oven; the pull-out drying trays being hollow structures;

[0008] a vacuum device, the vacuum device being in communication with the vacuum oven and being used for evacuating the vacuum oven under the control of the control device;

[0009] A heating device, the heating device being in communication with the pull-out drying tray and being configured to heat the pull-out drying tray under the control of the control device;

[0010] An automatic material rack trolley, which is used to transport the material trays to be placed in the vacuum oven;

[0011] A transfer device is used to transfer the material tray in the vacuum oven to the material rack automatic trolley, or to transfer the material tray in the material rack automatic trolley to the vacuum oven.

[0012] Furthermore, the vacuum oven further comprises:

[0013] A door frame, wherein the door frame is fixed to the box body, and the box door is slidably connected to the door frame;

[0014] A driving device, wherein the driving device drives the box door to rise and fall in the door frame;

[0015] An in-place detection device, the in-place detection device is used to detect whether the door is closed in place;

[0016] A locking device is fixed to the box body and is used to lock the box door.

[0017] Furthermore, the locking device includes a locking limit block and a tensioner; the locking limit block is fixed on the box door, and the locking limit block is provided with a limit opening; the tensioner is fixed on the box body, and the tensioner is provided with a tensioning lock block that can move back and forth in a straight line, the tensioning lock block can be placed in the locking limit block, and the tensioning lock block tightens the limit opening to lock the box door.

[0018] Furthermore, a receiving groove for accommodating the tensioning lock block is provided in the locking limit block, and the limiting opening is communicated with the receiving groove; the tensioning lock block is a cylindrical tube, and an outer convex ring is provided on the outer wall surface of one end of the cylindrical tube, and the outer convex ring is used to abut against the limiting opening when the cylindrical tube moves from the receiving groove through the limiting opening to the outside of the receiving groove.

[0019] Furthermore, the driving device includes a winch and a fixed pulley fixed on the door frame, and the pull rope of the winch is connected to the box door after passing around the fixed pulley.

[0020] Furthermore, a hard limit block for the door is provided at the bottom of the box body.

[0021] Furthermore, the pull-out drying tray includes a shell, a partition and a support protrusion; the shell is a hollow structure, and the shell is connected to a liquid inlet pipe and a liquid outlet pipe; the partition is fixed in the shell, and there are several partitions, all of which construct the internal area of ​​the shell into a serpentine channel, one end of the serpentine channel is connected to the liquid inlet pipe, and the other end of the serpentine channel is connected to the liquid outlet pipe; the support protrusion is located in the shell, and there are several support protrusions, one end of the support protrusion is fixed to the panel of the shell, and the other end of the support protrusion is fixed to the back plate of the shell.

[0022] Furthermore, the vacuum device includes a vacuum pump, a main vacuum tube, an upper branch vacuum tube and a lower branch vacuum drainage pipe; the vacuum pump is connected to the main vacuum tube; one end of the upper branch vacuum tube is connected to the main vacuum tube, and the other end of the upper branch vacuum tube is connected to the top of the box; one end of the lower branch vacuum drainage pipe is connected to the main vacuum tube, and the other end of the lower branch vacuum drainage pipe is connected to the bottom of the box, and the lower branch vacuum drainage pipe is also provided with a drainage valve.

[0023] Furthermore, the heating device includes a mold temperature controller, and the mold temperature controller is connected to the pull-out drying tray.

[0024] Furthermore, the transfer device includes a track, a frame, a lifting device and a bidirectional retractable fork, the track is located between the vacuum oven and the material rack automatic trolley, the frame is provided with rollers sliding along the track, the lifting device is fixed to the frame, the lifting device drives the bidirectional retractable fork to rise and fall, and the bidirectional retractable fork is used to transfer the material tray in the box to the material rack automatic trolley, or to transfer the material tray in the material rack automatic trolley into the box.

[0025] Furthermore, the material rack automatic trolley includes a material rack and an AGV trolley.

[0026] An automatic vacuum drying method is implemented by the aforementioned automatic vacuum drying equipment, and the drying method comprises the following steps:

[0027] S1. Place the tray containing the material to be dried on the rack, and the rack automatic trolley transfers the rack to the positioning bracket;

[0028] S2. The vacuum oven door is opened. Once the control device determines that the door is open and the material rack trolley is in place, it activates the transfer device, which uses a bidirectional retractable fork to remove the material tray from the rack and place it on the pull-out drying tray inside the vacuum oven.

[0029] S3. The control device determines that the transfer device completes the tray loading and controls the closing of the door. The control device detects that the door is closed in place through the in-place detection device and controls the locking device to lock the door.

[0030] S4. Turn on the vacuum device and evacuate the vacuum oven. When the vacuum degree in the vacuum oven reaches a preset value, start the heating device and dry the material in the tray by heating the pull-out drying tray in the vacuum oven;

[0031] S5. When the drying time reaches the preset value, the heating device stops heating and cools the material in the vacuum oven. When the vacuum oven cools to a predetermined temperature, the control device shuts down the heating and vacuum devices and opens the air-exposure valve on the vacuum oven to air-exposure the oven. When the control device determines that the air-exposure is complete, it unlocks the oven door and opens it.

[0032] S6. When the control device determines that the vacuum oven door is fully opened and the empty rack automatic trolley is in place, it activates the transfer device and uses the bidirectional retractable fork to fork the tray containing the dried material and place it on the rack;

[0033] S7. When the control device determines that the transfer device has completed the transfer of the material tray, the control device starts the automatic material rack trolley to transfer the material rack filled with dried materials to the designated location. At the same time, the door of the vacuum oven is closed and the system returns to the closed standby state.

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] This embodiment combines a vacuum oven, a vacuum device, a heating device, an automatic material rack trolley and a transfer device, integrates each part through a control device, utilizes the automatic material rack trolley to realize material feeding, utilizes the transfer device to realize material loading of the vacuum oven, utilizes the vacuum device to realize evacuation of the vacuum oven, utilizes the heating device to realize drying and cooling of the vacuum oven, utilizes the air exposure valve to realize air exposure of the vacuum oven, and utilizes the transfer device to realize material discharge of the vacuum oven, thereby realizing a full-process automatic vacuum drying operation of automatic material loading, automatic door closing and air extraction, automatic door opening and automatic air exposure, and automatic material discharge, and has the characteristics of high degree of automation, high efficiency and high safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 Schematic diagram of the structure of the automatic vacuum drying equipment in the embodiment;

[0037] Figure 2 Schematic diagram of the vacuum oven, vacuum device and heating device in the automatic vacuum drying equipment in the embodiment from a first perspective;

[0038] Figure 3 A second perspective schematic diagram of the vacuum oven, vacuum device, and heating device in the automatic vacuum drying equipment in the embodiment;

[0039] Figure 4 This is a top view of a pull-out drying tray with a material tray placed thereon in the embodiment;

[0040] Figure 5 This is a schematic structural diagram of a pull-out drying support plate in an embodiment;

[0041] Figure 6This is a schematic diagram of the structure of the vacuum ovens in the embodiment when they are arranged side by side;

[0042] Figure 7 Schematic diagram of the structure of the tensioner in the embodiment;

[0043] Figure 8 Flow chart of the automatic vacuum drying method in the embodiment;

[0044] Among them, 1-vacuum oven, 11-box body, 12-box door, 121-peep window, 13-exposure valve, 14-pull-out drying tray, 1411-bottom trough, 142-partition, 143-support protrusion, 144-liquid inlet pipe, 145-liquid outlet pipe, 15-door frame, 16-drive device, 17-in-place detection device, 181-locking limit block, 182-tensioner, 1821-tensioning cylinder, 1822-tensioner Locking block, 19-box door hard limit block, 2-vacuum device, 21-vacuum pump, 22-main vacuum tube, 23-upper branch vacuum tube, 24-lower branch vacuum drain pipe, 25-drain valve, 3-heating device, 4-material rack automatic trolley, 5-transfer device, 51-track, 52-frame, 53-drive motor, 54-bidirectional retractable fork, 6-material rack, 7-positioning bracket, 8-control device, 9-vacuum pressure gauge. DETAILED DESCRIPTION

[0045] The present invention will be described in further detail below with reference to the embodiments and accompanying drawings. However, this should not be construed as limiting the scope of the present invention to the following embodiments, as all technologies implemented based on the present invention fall within the scope of the present invention.

[0046] Example

[0047] See also Figure 1-7 , an automatic vacuum drying device, comprising:

[0048] The control device 8 uses existing control elements such as PLC or computer to realize the operation control of the drying equipment;

[0049] The vacuum drying oven 1 includes a box body 11 and a box door 12 that can be opened and closed automatically. The vacuum drying oven 1 is provided with an air exposure valve 13, which adopts an air exposure electric valve. The vacuum drying oven 1 is provided with several layers of pull-out drying trays 14; the pull-out drying trays 14 are hollow structures; it should be noted that the box body 11 of the vacuum drying oven 1 is divided into an inner box body 11 and an outer box body 11, the inner box body 11 is welded with stainless steel plates, the outer part of the inner box body 11 is wrapped with thermal insulation rock wool, and the outer part is wrapped with stainless steel thin plates; a thermocouple is also installed in the box body 11 for detecting the temperature in the box body 11 and feeding back the temperature signal to the control device 8; the number and size of the pull-out drying trays 14 can be set as needed, for example Figure 2As shown, 10 layers of drying trays are provided in the box 11, and each layer of drying trays can hold 4 material trays.

[0050] a vacuum device 2, the vacuum device 2 being in communication with the vacuum oven 1 and configured to evacuate the vacuum oven 1 under the control of a control device 8;

[0051] A heating device 3, the heating device 3 being in communication with the pull-out drying tray 14, and being configured to heat or cool the pull-out drying tray 14 under the control of the control device 8;

[0052] An automatic material rack trolley 4, which is used to transport material trays to be placed in the vacuum oven 1;

[0053] The transfer device 5 is used to transfer the material tray in the vacuum oven 1 to the automatic material rack 6 trolley, or to transfer the material tray in the automatic material rack 6 trolley to the vacuum oven 1.

[0054] This embodiment combines a vacuum oven 1, a vacuum device 2, a heating device 3, an automatic material rack trolley 4 and a transfer device 5, and integrates and controls each part through a control device 8. The automatic material rack trolley 4 is used to realize material feeding, the transfer device 5 is used to realize loading of the vacuum oven 1, the vacuum device 2 is used to realize evacuation of the vacuum oven 1, the heating device 3 is used to realize drying and cooling of the vacuum oven 1, the airing electric valve is used to realize airing of the vacuum oven 1, the transfer device 5 is used to realize unloading of the vacuum oven 1, and the automatic material rack trolley 4 is used to realize the transfer of dried materials. The full-process automatic vacuum drying operation of automatic material loading, automatic door closing and airing, automatic door opening and automatic unloading is realized, which has the characteristics of high degree of automation, high efficiency and high safety.

[0055] See also Figure 1-3 In this embodiment, the vacuum oven 1 further includes: a door frame 15, which is fixed to the box body 11. The door frame 15 can be formed by welding channel steel, and the door 12 is placed in the groove of the channel steel to achieve a sliding connection between the door 12 and the door frame 15, so that the door 12 slides along the door frame 15;

[0056] The drive device 16 is a winch with a rope wound around it, or other device capable of driving the door 12 to rise and fall within the gantry 15. In this embodiment, the drive device 16 is a winch with a rope wound around it, electrically connected to the control device 8. A fixed pulley is fixed to the gantry 15, and the rope of the winch passes over the fixed pulley and is connected to the door 12. The winch raises or lowers the door 12 by winding or releasing the rope, thereby opening and closing the door 12. To ensure safety, the winch uses a double-rope design, which prevents the door from falling even if one rope breaks.

[0057] The in-place detection device 17 is used to detect whether the door 12 is closed in place. The in-place detection device 17 adopts a photoelectric sensor, which is installed on the top of the box body 11 of the vacuum drying oven 1 and is electrically connected to the control device 8. It detects whether the door 12 is closed in place and feeds back the detection signal to the control device 8;

[0058] The locking device is fixed to the housing 11 and is used to lock the door 12. When the control device 8 determines through feedback signals that the door 12 is fully closed, the control device 8 controls the locking device to lock the door 12. When the vacuum drying oven 1 is in the air-exposed state, the control device 8 controls the locking device to unlock, and the hoist lifts the door panel to open the vacuum drying oven 1. This embodiment uses a hoist to automatically open and close the door 12. A photoelectric sensor detects whether the door 12 is fully closed and automatically locks the door 12 via the locking device. This realizes the automation of the vacuum drying oven 1, eliminating the need for manual operation and improving work efficiency and safety.

[0059] In this embodiment, the locking device includes a locking limit block 181 and a tensioner 182; the locking limit block 181 is fixed on the box door 12, and a limit opening and a receiving groove for accommodating the tensioning lock block 1822 are provided in the locking limit block 181, and the limit opening is U-shaped and passes through the receiving groove; the tensioner 182 is fixed on the box body 11, and the tensioner 182 includes a tensioning cylinder 1821 and a tensioning lock block 1822, as shown in FIG. Figure 7As shown, the tensioning cylinder 1821 drives the tensioning lock block 1822 to perform linear reciprocating motion, and the tensioning cylinder 1821 is initially in an extended state. The tensioning lock block 1822 is a cylindrical tube, one end of which is fixed to the piston rod of the tensioning cylinder 1821, and the outer wall surface of the other end of the cylindrical tube is provided with an outer convex ring. When the box door 12 slides down into place, the locking limit block 181 covers the tensioning lock block 1822, and the tensioning lock block 1822 is placed in the locking limit block 181. When the control device 8 controls the box door 12 to be locked, the tensioning cylinder 1821 retracts, and the cylindrical tube moves from the receiving groove through the limit opening to the outside of the receiving groove. The outer convex ring abuts the limit opening, and then the tensioning lock block 1822 tightens the limit opening, thereby locking the box door 12. When the box door 12 needs to be unlocked, the control device 8 controls the tensioning cylinder 1821 to be extended. Furthermore, two locking limit blocks 181 are provided at the top of the door 12, and two locking limit blocks 181 are provided at the bottom of the door 12. Correspondingly, two tensioners 182 are provided at the top of the box body 11, and two tensioners 182 are provided at the bottom of the box body 11, so that the upper and lower ends of the door 12 are locked simultaneously, ensuring a balanced locking force of the door 12. This embodiment ensures that the door 12 is firmly locked in the closed state through the cooperation between the tensioning lock blocks 1822 and the limit openings, ensuring that the vacuum device 2 can smoothly evacuate the vacuum drying oven 1. In the initial state, if the door 12 is not closed, if the vacuum drying oven 1 is evacuated, there may be a problem of not being able to evacuate the vacuum drying oven 1 smoothly. In addition, the design of the tensioner 182 makes the locking process smooth and fast. Working in conjunction with the winch, they realize the automatic opening and closing, locking, and automatic vacuuming of the door 12 of the vacuum drying oven 1, greatly improving the automation level and operating efficiency of the equipment.

[0060] It should be noted that a peep window 121 is provided on the box door 12 to facilitate observation of the situation inside the box body 11 .

[0061] See also Figure 1-3 In this embodiment, a hard stop block 19 is provided at the bottom of the box body 11 to support the door 12 in an emergency to prevent the door panel from falling off and onto the ground.

[0062] See also Figure 1-3 In this embodiment, the heating device 3 includes a mold temperature controller, which is a commercially available product. This embodiment uses an oil-type mold temperature controller with an external oil tank. The oil pipe of the oil-type mold temperature controller is provided with a manual valve and an electric valve, and is connected to all the pull-out drying trays 14. Under the control of the control device 8, when the vacuum degree inside the box 11 of the vacuum oven 1 meets the standard, the heat transfer oil is automatically introduced into the pull-out drying tray 14 for heating, and the temperature is detected by the thermocouple in the box 11. After the temperature signal is fed back to the control device 8, the control device 8 dynamically adjusts the heating temperature according to the system preset value.

[0063] It should be noted that the oil-type mold temperature controller of this embodiment adopts a dual temperature control type. In addition to the heating function, it also has a cooling function. A cooling pipeline and a plate heat exchanger are provided inside the mold temperature controller. The plate heat exchanger adopts a commercially available finished product. The cooling pipeline is connected to the external cooling circulating water, and the plate heat exchanger can be used to cool the hot oil. Through the control system setting, when the oil type mold temperature controller is in the heating mode, the valve of the cooling pipeline inside the mold temperature controller is closed, and the cooling circulating water cannot exchange heat inside the mold temperature controller. When the oil type mold temperature controller is in the cooling mode, the original heating element stops working, and the heat transfer oil continues to flow into the pull-out drying tray 14 in the vacuum drying oven 1. The valve of the cooling pipeline inside the mold temperature controller is opened, and the external cooling circulating water enters the cooling pipeline. The cooling circulating water and the high-temperature heat transfer oil flow into the plate heat exchanger at the same time for heat exchange, and then the heated circulating water and the cooled heat transfer oil flow out of the plate heat exchanger. The purpose of cooling the heat transfer oil is achieved through the plate heat exchanger. The cooled heat transfer oil enters the pull-out drying tray 14 in the vacuum drying oven 1 and then flows back into the mold temperature controller. The heat transfer oil after flowing back continues to be cooled, and the cycle continues. As time goes by, the temperature of the heat transfer oil gets lower and lower, and then the temperature of the pull-out drying tray 14 in the vacuum drying oven 1 also decreases, and finally the material on the tray is reduced to below the temperature that can be exposed to air.

[0064] The external cooling water supply connected to the mold temperature controller can be the factory production system cooling water supply, or a small air-cooled chiller. If a small air-cooled chiller is used, it can be connected to the control device 8, automatically turning it on when cooling is required and off at other times, thereby achieving energy conservation and consumption reduction. If the factory production system cooling water supply is used, since the cooling capacity is far less than the cooling capacity required by the production system, the design redundancy can be used to cool the oven. Its use or non-use has little impact on the production system, and no additional cooling equipment is required.

[0065] In this embodiment, the material is cooled before exposure to air in order to prevent oxidation or natural decay of the material at high temperature.

[0066] See also Figure 4-5In this embodiment, the pull-out drying tray 14 includes a shell, a partition 142 and a support protrusion 143; the shell is a hollow structure, which is welded by a bottom groove 1411 and a sealing plate, and the shell is connected with a liquid inlet pipe 144 and a liquid outlet pipe 145; the partition 142 is fixed in the shell, and there are several partitions 142, all of which construct the internal area of ​​the shell into a serpentine channel, one end of the serpentine channel is connected to the liquid inlet pipe 144, and the other end of the serpentine channel is connected to the liquid outlet pipe 145; the support protrusion 143 is located in the shell, and there are several support protrusions 143, one end of the support protrusion 143 is fixed to the panel of the shell, and the other end of the support protrusion 143 is fixed to the back plate of the shell. The structure of the hollow shell and the support protrusion 143 is adopted to reduce the overall mass of the pull-out drying tray 14 while ensuring the support strength.

[0067] See also Figure 1-2 It should be noted that when the pull-out drying tray 14 is placed in the box body 11 of the vacuum drying oven 1, the liquid inlet pipe 144 and the liquid outlet pipe 145 of all the pull-out drying trays 14 are inserted into the outside of the back of the box body 11 and are connected to the oil pipe of the mold temperature controller.

[0068] See also Figure 1-3 In this embodiment, the vacuum device 2 includes a vacuum pump 21, a main vacuum pipe 22, an upper branch vacuum pipe 23, and a lower branch vacuum drain pipe 24. The vacuum pump 21 can be a jet pump or a water ring vacuum pump 21, depending on the vacuum requirements and actual conditions. The vacuum device 2 is electrically connected to the control device 8 and, in conjunction with a vacuum gauge, achieves vacuum control of the vacuum drying oven 1. The vacuum pump 21 is connected to the main vacuum pipe 22. One end of the upper branch vacuum pipe 23 is connected to the main vacuum pipe 22, and the other end of the upper branch vacuum pipe 23 is connected to the top of the housing 11. One end of the lower branch vacuum drain pipe 24 is connected to the main vacuum pipe 22, and the other end of the lower branch vacuum drain pipe 24 is connected to the bottom of the housing 11. In this embodiment, the vacuum pipes are connected to both the top and bottom of the housing 11 of the vacuum drying oven 1, which can improve evacuation efficiency and promote uniform vacuum distribution within the vacuum drying oven 1. The lower branch vacuum drain pipe 24 also serves as a drainage pipe and is equipped with a drain valve 25 to drain water after drying. It should be noted that the bottom of the oven is provided with a slope around the drain outlet to prevent water accumulation in the oven.

[0069] It should be noted that the box body 11 of the vacuum drying oven 1 is provided with a vacuum pressure gauge 9 to detect the pressure value of the box body 11 and feed back a signal to the control device 8 .

[0070] See also Figure 1 and Figure 6In this embodiment, the transfer device 5 includes a track 51, a frame 52, a lifting device and a bidirectional retractable fork 54. The track 51 is located between the vacuum oven 1 and the automatic material rack trolley 4. The frame 52 is provided with rollers that slide along the track 51, and the frame 52 is equipped with a brake assembly and a motor that drives the rollers. The lifting device is fixed on the frame 52, and a drive motor 53 is provided on the top of the frame 52. The drive motor 53 outputs power to the left and right transmission shafts respectively through a coupling and a commutator. Each transmission shaft then transmits power to a lead screw set in the vertical direction through a coupling and a commutator. The lifting device drives two parallel lead screws to rotate synchronously through a drive motor 53. The bidirectional retractable fork 54 is fixed in the frame 52 by connecting with the lead screw nut, and is driven to rise and fall by the lifting device. The bidirectional retractable fork 54 is a commercially available finished product and is used to transfer the material tray in the box 11 to the automatic material rack 6 trolley, or to transfer the material tray in the automatic material rack 6 trolley to the box 11. It should be noted that the lifting device is equipped with structures such as linear guides to achieve lifting. The material rack automatic trolley 4 includes a material rack 6 and an AGV trolley. The AGV trolley lifts the material rack 6 and moves along a preset route to transport the material rack 6 to a designated location.

[0071] The transfer device 5 of this embodiment uses a bidirectional retractable fork 54, which is installed between the vacuum oven 1 and the material rack 6 trolley. The material rack 6 trolley is equipped with the same number of material racks 6 as the number of layers in the vacuum oven 1, and can hold the same number of material trays as the vacuum oven 1. The material rack 6 is lifted and transported by the AGV trolley. After the AGV trolley arrives at the predetermined location, it is fixed in position by the positioning bracket 7 to achieve accurate positioning to ensure that the bidirectional retractable fork 54 can smoothly fork the material tray. The positioning bracket 7 is provided with an in-place sensor for detecting whether the material rack 6 is in place and feeding back a signal to the control device 8 to facilitate the transfer device 5 to carry out the material transfer or transfer operation. The transfer device 5, the AGV trolley control and the vacuum oven 1 are centrally connected to the control device 8 to realize fully automatic control of material transfer, vacuum oven 1 evacuation and drying. In addition, a safety interlock is provided between the transfer device 5, the vacuum oven 1, the heating device 3 and the AGV trolley to fully ensure safe production.

[0072] It should be noted that if Figure 6 As shown, when several vacuum drying ovens 1 are arranged side by side, all vacuum drying ovens 1 can share one transfer device 5 to realize the transfer of material trays between the material rack 6 and the vacuum drying ovens 1 .

[0073] Based on the same inventive concept, this embodiment also provides an automatic vacuum drying method, which is implemented by the aforementioned automatic vacuum drying equipment, such as Figure 8 As shown, the drying method includes the following steps:

[0074] S1. The tray containing the material to be dried is placed in the rack 6, and the rack automatic trolley 4 transfers the rack 6 to the positioning bracket 7;

[0075] S2. The vacuum oven door 12 is opened. When the control device 8 determines that the door 12 is open and the rack 6 is in place, the control device 8 starts the transfer device 5 and takes the tray in the rack 6 and places it on the pull-out drying tray 14 in the vacuum oven 1 via the bidirectional retractable fork 54.

[0076] S3. The control device 8 determines that after the transfer device 5 completes the tray packing, the control device 8 controls the closing of the door 12. After the control device 8 detects that the door 12 is closed in place by the in-place detection device 17, the control locking device locks the door 12;

[0077] S4. Turn on the vacuum device 2, evacuate the vacuum oven 1, and when the vacuum degree in the vacuum oven 1 reaches a preset value, start the heating device 3, and dry the material in the tray by heating the pull-out drying tray 14 in the vacuum oven 1;

[0078] S5. When the drying time reaches the preset duration, heating device 3 stops heating and activates the cooling function. The material in vacuum oven 1 is cooled by cooling the pull-out drying tray 14. When the vacuum oven 1 cools to a predetermined temperature, control device 8 shuts down heating device 3 and vacuum device 2. Control device 8 controls the opening of air release valve 13 on vacuum oven 1 to release the vacuum oven 1. When control device 8 determines that the air release of vacuum oven 1 is complete, control device 8 controls the unlocking and opening of oven door 12.

[0079] S6. The control device 8 determines that the door 12 of the vacuum oven 1 is open and the empty rack automatic trolley 4 is in place, and then opens the transfer device 5 and uses the bidirectional retractable fork 54 to fork the tray containing the dried material to the rack 6;

[0080] S7. When the control device 8 determines that the transfer device 5 has completed the transfer of the material tray, the control device 8 starts the automatic material rack trolley 4 to transfer the material rack 6 filled with dried materials to the designated location. At the same time, the door 12 of the vacuum oven 1 is closed and the system returns to the closed standby state.

[0081] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An automatic vacuum drying equipment, characterized in that, include: A vacuum drying oven (1), comprising a box body (11) and an automatically openable door (12), the vacuum drying oven (1) being provided with an air release valve (13), and a plurality of layers of pull-out drying support plates (14) being provided inside the vacuum drying oven (1); the pull-out drying support plates (14) being of a hollow structure; a vacuum device (2), the vacuum device (2) being in communication with the vacuum oven (1) and being used for evacuating the vacuum oven (1) under the control of a control device (8); A heating device (3), the heating device (3) being in communication with the pull-out drying support plate (14), and being used for heating or cooling the pull-out drying support plate (14) under the control of the control device (8); An automatic material rack trolley (4), the automatic material rack trolley (4) is used to transport the material tray to be placed in the vacuum drying oven (1); A transfer device (5) is used to transfer the material tray in the vacuum drying oven (1) to the material rack automatic trolley (4), or to transfer the material tray in the material rack automatic trolley (4) to the vacuum drying oven (1).

2. The automatic vacuum drying equipment according to claim 1, characterized in that: The vacuum drying oven (1) further comprises: A door frame (15), wherein the door frame (15) is fixed to the box body (11), and the box door (12) is slidably connected to the door frame (15); A driving device (16), wherein the driving device (16) drives the box door (12) to rise and fall in the door frame (15); an in-place detection device (17), the in-place detection device (17) being used to detect whether the box door (12) is closed in place; A locking device is fixed to the box body (11) and is used to lock the box door (12).

3. The automatic vacuum drying equipment according to claim 1, characterized in that: The locking device comprises a locking limit block (181) and a tensioner (182); The locking limit block (181) is fixed on the box door (12), and the locking limit block (181) is provided with a limit opening; The tensioner (182) is fixed on the box body (11), and the tensioner (182) is provided with a tensioning lock block (1822) that can move linearly back and forth. The tensioning lock block (1822) can be placed in the locking limit block (181), and the tensioning lock block (1822) tightens the limit opening to lock the box door (12).

4. The automatic vacuum drying equipment according to claim 3, characterized in that: The locking limit block (181) is provided with a receiving groove for receiving the tensioning lock block (1822), and the limiting opening is connected to the receiving groove; The tightening lock block (1822) is a cylindrical tube, and an outer convex ring is provided on the outer wall surface of one end of the cylindrical tube. The outer convex ring is used to abut against the limiting opening when the cylindrical tube moves from the accommodating groove through the limiting opening to the outside of the accommodating groove.

5. The automatic vacuum drying equipment according to claim 2, characterized in that: The driving device (16) includes a winch and a fixed pulley fixed on the door frame (15); the pull rope of the winch passes around the fixed pulley and is connected to the box door (12).

6. The automatic vacuum drying equipment according to claim 1, characterized in that: The pull-out drying support plate (14) comprises a shell, a partition (142) and a supporting protrusion (143); The shell is a hollow structure, and is connected to a liquid inlet pipe (144) and a liquid outlet pipe (145); The partition (142) is fixed in the shell, and a plurality of partitions (142) are provided. All the partitions (142) configure the inner area of ​​the shell into a serpentine channel, one end of the serpentine channel is connected to the liquid inlet pipe (144), and the other end of the serpentine channel is connected to the liquid outlet pipe (145); The supporting protrusion (143) is located in the shell, and a plurality of the supporting protrusions (143) are provided. One end of the supporting protrusion (143) is fixed to the panel of the shell, and the other end of the supporting protrusion (143) is fixed to the back plate of the shell.

7. The automatic vacuum drying equipment according to claim 1, characterized in that: The vacuum device (2) comprises a vacuum pump (21), a main vacuum pipe (22), an upper branch vacuum pipe (23) and a lower branch vacuum drainage pipe (24); The vacuum pump (21) is in communication with the main vacuum pipe (22); One end of the upper branch vacuum tube (23) is in communication with the main vacuum tube (22), and the other end of the upper branch vacuum tube (23) is in communication with the top of the box (11); One end of the lower branch vacuum drainage pipe (24) is in communication with the main vacuum pipe (22), and the other end of the lower branch vacuum drainage pipe (24) is in communication with the bottom of the box (11), and the lower branch vacuum drainage pipe (24) is also provided with a drainage valve (25).

8. The automatic vacuum drying equipment according to claim 1, characterized in that: The heating device (3) comprises a mold temperature controller, and the mold temperature controller is connected to the pull-out drying support plate (14).

9. The automatic vacuum drying equipment according to claim 1, characterized in that: The transfer device (5) includes a track (51), a frame (52), a lifting device and a bidirectional retractable fork (54), wherein the track (51) is located between the vacuum oven (1) and the material rack automatic trolley (4), the frame (52) is provided with rollers that slide along the track (51), the lifting device is fixed to the frame (52), and the lifting device drives the bidirectional retractable fork (54) to rise and fall, and the bidirectional retractable fork (54) is used to transfer the material tray in the box (11) to the material rack automatic trolley (4), or to transfer the material tray in the material rack automatic trolley (4) to the box (11).

10. An automatic vacuum drying method, implemented by the automatic vacuum drying equipment described in any one of 1-9, characterized in that: The drying method comprises the following steps: S1. The tray containing the material to be dried is placed on the rack (6), and the rack automatic trolley (4) transfers the rack (6) to the positioning bracket (7); S2. The vacuum oven (1) opens the door (12). When the control device (8) determines that the door (12) is open and the material rack (6) trolley is in place, the control device (8) starts the transfer device (5) and uses the bidirectional retractable fork (54) to take the material tray in the material rack (6) and place it on the pull-out drying tray (14) in the vacuum oven (1); S3. The control device (8) determines that the transfer device (5) completes the tray packing and controls the closing of the box door (12). The control device (8) detects that the box door (12) is closed in place through the in-place detection device (17), and controls the locking device to lock the box door (12); S4. Turn on the vacuum device (2) and evacuate the vacuum oven (1). When the vacuum degree in the vacuum oven (1) reaches a preset value, start the heating device (3) and dry the material in the tray by heating the pull-out drying tray (14) in the vacuum oven (1); S5. When the drying reaches a preset time, the heating device (3) stops heating and starts the cooling function to cool the material in the vacuum drying oven (1). When the vacuum drying oven (1) cools to a predetermined temperature, the control device (8) turns off the heating device (3) and the vacuum device (2). The control device (8) controls the opening of the air-exposure valve (13) on the vacuum drying oven (1) to perform an air-exposure operation on the vacuum drying oven (1). When the control device (8) determines that the air-exposure of the vacuum drying oven (1) is completed, the control device (8) controls the unlocking of the door (12) and opens the door (12); S6. When the control device (8) determines that the door (12) of the vacuum oven (1) is fully opened and the empty material rack automatic trolley (4) is in place, the transfer device (5) is turned on and the bidirectional retractable fork (54) is used to fork the tray containing the dried material onto the material rack (6); S7. When the control device (8) determines that the transfer device (5) has completed the transfer of the material tray, the control device (8) starts the material rack automatic trolley (4) to transfer the material rack (6) filled with dried materials to the designated location. At the same time, the door (12) of the vacuum drying oven (1) is closed, and the system returns to the closed standby state.

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