Vacuum dryer

Abstract

The utility model discloses a vacuum drying machine which comprises a rack, one or more workpiece placing jigs are arranged on the rack, a sealing cover with a downward opening is arranged above the workpiece placing jigs, a lifting assembly is arranged between the sealing cover and the rack, and the lifting assembly is used for driving the sealing cover to be close to or away from the workpiece placing jigs. After the sealing cover is connected with the workpiece placing jig, a sealed cavity is formed between the sealing cover and the workpiece placing jig; a vacuum device is arranged below the workpiece placing jig, is communicated with the sealing cavity, and is used for vacuumizing or breaking vacuum of the sealing cavity; the controller is electrically connected with the lifting assembly and the vacuum device; a vacuumizing opening and a vacuum breaking opening are formed in the workpiece placing jig; the vacuum device comprises a vacuum machine, a vacuumizing pipe connected with the vacuum machine and a vacuum breaking pipe. The vacuum drying process is automatically completed, the drying efficiency and effect are improved, energy consumption is reduced, the size is small, and use is safe and reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of drying, in particular to a vacuum drying machine. Background Art

[0002] After the workpiece is processed, the moisture on the surface of the workpiece needs to be dried to prepare for the next process. In the prior art, hot air blowers are often used for drying, which has the following problems:

[0003] 1. The hot air blower is large in size and takes up space;

[0004] 2. The working power is high and the drying time is long, the efficiency is low and the energy consumption is high;

[0005] 3. The hot air blown out is generally above 80 degrees, which can easily burn the operator and lack safety;

[0006] 4. During the drying process, the workpiece is exposed to the external environment, the drying effect is poor and water stains are likely to remain.

[0007] Therefore, there is an urgent need to design a vacuum dryer that can automatically complete the vacuum drying process, improve drying efficiency and effect, reduce energy consumption, and be small in size and safe and reliable to use. Utility Model Content

[0008] In order to solve the above problems, the technical solutions adopted by the utility model are as follows:

[0009] A vacuum dryer comprises a frame, wherein the frame is provided with one or more workpiece placement jigs, a cover with an opening facing downward is provided above the workpiece placement jig, a lifting assembly is provided between the cover and the frame, and the lifting assembly is used to drive the cover to approach or move away from the workpiece placement jig;

[0010] After the cover is connected to the workpiece placement fixture, a sealed chamber is formed between the cover and the workpiece placement fixture; a vacuum device is provided below the workpiece placement fixture, the vacuum device is connected to the sealed chamber, and the vacuum device is used to evacuate or break the vacuum of the sealed chamber;

[0011] Also included is a controller electrically connected to the lifting assembly and the vacuum device.

[0012] Preferably, the workpiece placement jig is provided with a vacuum port and a vacuum breaking port; the vacuum device comprises a vacuum machine, a vacuum pipe connected to the vacuum machine, and a vacuum breaking pipe, the vacuum pipe is connected to the sealed chamber through the vacuum port, and the vacuum breaking pipe is connected to the sealed chamber through the vacuum breaking port;

[0013] The vacuum pumping tube and the vacuum breaking tube are respectively provided with a first valve and a second valve electrically connected to the controller.

[0014] Preferably, a seal is provided at the connection between the workpiece placement fixture and the cover.

[0015] Preferably, a buffer assembly is provided between the lifting assembly and the sealing cover.

[0016] Preferably, the buffer assembly includes a connecting plate, a buffer member and a guide column, the upper surface of the connecting plate is connected to the lifting assembly, the guide section of the guide column passes through the guide hole of the connecting plate and is connected to the back side of the cover, and the buffer member is located between the cover and the connecting plate.

[0017] Preferably, the buffer member is a buffer pad or a spring or a combination thereof.

[0018] Preferably, the lifting assembly includes a driver connected to the frame, the driving end of the driver is connected to the connecting plate, a guide assembly is arranged around the outer side of the driver, the guide assembly includes a guide seat and a guide rod slidably connected to each other, the guide seat is connected to the frame, and one end of the guide rod is connected to the connecting plate.

[0019] Preferably, the outer surface of the cover except the opening is provided with reinforcing ribs.

[0020] Preferably, the frame is provided with an infrared counter-radiation sensor electrically connected to the controller on the outside of the workpiece placement fixture.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] The vacuum drying process in the utility model is completed automatically, thereby improving drying efficiency and effect, reducing energy consumption, having a small size and being safe and reliable to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0024] Figure 2 It is the front view of the utility model;

[0025] Figure 3 for Figure 2 A partial enlarged schematic diagram in the middle;

[0026] Among them: frame 1, workpiece placement fixture 2, cover 3, lifting assembly 4, vacuum device 6, seal 7, buffer assembly 8, infrared radiation sensor 9, first valve 10, second valve 20, vacuum port 21, vacuum breaking port 22, reinforcing rib 31, driver 41, guide assembly 42, vacuum machine 61, vacuum tube 62, vacuum breaking tube 63, connecting plate 81, buffer 82, guide column 83, guide seat 421, guide rod 422. DETAILED DESCRIPTION

[0027] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively with reference to the accompanying drawings. The accompanying drawings provide preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0028] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may also be an element centered thereon. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an element centered thereon at the same time. The terms "vertical", "horizontal", "left", "right", "up", "down", "front", "rear" and similar expressions used herein are for illustrative purposes only.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0030] Below, in conjunction with the accompanying drawings and specific implementation methods, the utility model is further described:

[0031] like Figure 1-3 As shown, a vacuum drying machine comprises a frame 1, on which one or more workpiece placement jigs 2 are arranged, a cover 3 with an opening facing downward is arranged above the workpiece placement jig 2, and a lifting assembly 4 is arranged between the cover 3 and the frame 1, and the lifting assembly 4 is used to drive the cover 3 to approach or move away from the workpiece placement jig 2;

[0032] After the cover 3 is connected to the workpiece placement fixture 2, a sealed chamber is formed between the cover 3 and the workpiece placement fixture 2; a vacuum device 6 is provided below the workpiece placement fixture 2, and the vacuum device 6 is connected to the sealed chamber, and the vacuum device 6 is used to evacuate or break the vacuum of the sealed chamber;

[0033] Also included is a controller (not shown in the figure) electrically connected to the lifting assembly 4 and the vacuum device 6 .

[0034] In this embodiment, when working, the workpiece is first placed on the workpiece placement fixture 2, and then the lifting component 4 is controlled by the controller, and the lifting component 4 drives the cover 3 to move in the direction of the workpiece placement fixture 2 until the cover 3 is connected to the workpiece placement fixture 2, and the workpiece is placed in the sealed chamber; then the vacuum device 6 is started to evacuate the sealed chamber to form a vacuum chamber in the sealed chamber, and moisture is separated from the surface of the workpiece during the process to dry the workpiece; after the set time is completed, the vacuum of the sealed chamber is broken, the lifting component 4 is reset, and the workpiece is manually taken out;

[0035] Compared with the hot air blower in the prior art, the above structure is small in size and saves space; it works under normal temperature and will not cause burns to operators, thus improving safety; vacuum drying is performed in a sealed chamber, which has good drying effect and high drying efficiency, and is not affected by impurities in the external environment air, effectively avoiding the generation of water stains; at the same time, the working power of the vacuum machine 61 in the vacuum device 6 is one third of that of the hot air blower, thus reducing energy consumption;

[0036] In addition, the lifting, vacuuming and breaking of the cover 3 during the vacuum drying process are automatically controlled without manual intervention, which greatly improves work efficiency.

[0037] Further, such as Figure 1 , 2 As shown, in order to meet the workpiece production cycle requirements and improve processing efficiency, two workpiece placement fixtures 2 are provided on the frame 1, which can vacuum dry two workpieces at the same time.

[0038] Further, such as Figure 1 , 2 As shown, the workpiece placement fixture 2 is provided with a vacuum port 21 and a vacuum breaking port 22; the vacuum device 6 includes a vacuum machine 61, a vacuum pipe 62 connected to the vacuum machine 61, and a vacuum breaking pipe 63, the vacuum pipe 62 is connected to the sealed chamber through the vacuum port 21, and the vacuum breaking pipe 63 is connected to the sealed chamber through the vacuum breaking port 22;

[0039] The vacuum pumping tube 62 and the vacuum breaking tube 63 are respectively provided with a first valve 10 and a second valve 20 electrically connected to the controller.

[0040] In this embodiment, when the cover 3 is connected to the workpiece placement fixture 2, in the vacuum state, the controller controls the second valve 20 to close, the first valve 10 to open, and the vacuum machine 61 to start vacuuming the sealed chamber; after the vacuum drying is completed, the controller controls the first valve 10 to close, the second valve 20 to open, the vacuum machine 61 stops working, and enters the vacuum breaking state; after completion, the controller resets the mechanism, takes out the workpiece, and repeats the above steps to achieve vacuum drying of the workpiece.

[0041] In this embodiment, the first valve 10 and the second valve 20 are solenoid valves.

[0042] Further, such as Figure 1 As shown, in order to improve the sealing performance of the sealed chamber, a sealing member 7 is provided at the connection between the workpiece placement fixture 2 and the cover 3; the sealing member 7 is made of silicone rubber.

[0043] Further, such as Figure 1 , 2 As shown in FIG. 3 , in order to enhance the pressing effect of the lifting assembly 4 on the cover 3 and prevent the cover 3 from being damaged by the downward pressure, a buffer assembly 8 is provided between the lifting assembly 4 and the cover 3 .

[0044] Further, such as Figure 1 , 2 As shown in Figure 3, the buffer assembly 8 includes a connecting plate 81, a buffer member 82 and a guide column 83. The upper surface of the connecting plate 81 is connected to the lifting assembly 4. The guide section of the guide column 83 passes through the guide hole of the connecting plate 81 and is connected to the back side of the cover 3. The buffer member 82 is located between the cover 3 and the connecting plate 81.

[0045] In this embodiment, when the cover 3 contacts the workpiece placement fixture 2, the lifting assembly 4 drives the connecting plate 81 to squeeze the buffer 82 and continue to move toward the cover 3, so that the cover 3 is more tightly connected to the workpiece placement fixture 2, while preventing the cover 3 from being damaged by the downward pressure.

[0046] In order to improve the connection stability and the smoothness when pressing down, four guide pillars 83 are provided and located around the outer side of the connecting plate 81.

[0047] Furthermore, the buffer member 82 is a buffer pad or a spring or a combination thereof.

[0048] Further, such as Figure 1 , 2 As shown, in order to improve the smoothness of the lifting and lowering of the cover 3, the lifting assembly 4 includes a driver 41 connected to the frame 1, the driving end of the driver 41 is connected to the connecting plate 81, and a guide assembly 42 is arranged around the outer side of the driver 41. The guide assembly 42 includes a guide seat 421 and a guide rod 422 that are slidably connected to each other, the guide seat 421 is connected to the frame 1, and one end of the guide rod 422 is connected to the connecting plate 81.

[0049] Further, such as Figure 1 As shown, during the vacuuming process, the cover 3 is subjected to a great air pressure. In order to improve the compressive strength of the cover 3, a reinforcing rib 31 is provided on the outer surface of the cover 3 except for the opening.

[0050] Further, such as Figure 1As shown, in order to improve safety, the frame 1 is provided with an infrared radiation sensor 9 electrically connected to the controller on the outside of the workpiece placement fixture 2 to prevent the operator from placing the workpiece and starting the lifting assembly 4 without triggering the start button.

[0051] For those skilled in the art, various other corresponding changes and deformations can be made according to the technical solutions and concepts described above, and all of these changes and deformations should fall within the scope of protection of the claims of the utility model patent.

Claims

1. A vacuum dryer, comprising a frame, characterized in that: The frame is provided with one or more workpiece placement jigs, a cover with an opening facing downward is provided above the workpiece placement jig, a lifting assembly is provided between the cover and the frame, and the lifting assembly is used to drive the cover to approach or move away from the workpiece placement jig; After the cover is connected to the workpiece placement fixture, a sealed chamber is formed between the cover and the workpiece placement fixture; a vacuum device is provided below the workpiece placement fixture, the vacuum device is connected to the sealed chamber, and the vacuum device is used to evacuate or break the vacuum of the sealed chamber; Also included is a controller electrically connected to the lifting assembly and the vacuum device.

2. A vacuum dryer according to claim 1, characterized in that: The workpiece placement jig is provided with a vacuum port and a vacuum breaking port; the vacuum device comprises a vacuum machine, a vacuum pipe connected to the vacuum machine, and a vacuum breaking pipe, the vacuum pipe is connected to the sealed chamber through the vacuum port, and the vacuum breaking pipe is connected to the sealed chamber through the vacuum breaking port; The vacuum pumping tube and the vacuum breaking tube are respectively provided with a first valve and a second valve electrically connected to the controller.

3. A vacuum dryer according to claim 1, characterized in that: A sealing member is provided at the connection between the workpiece placement fixture and the sealing cover.

4. A vacuum dryer according to claim 1, characterized in that: A buffer component is arranged between the lifting component and the sealing cover.

5. A vacuum dryer according to claim 4, characterized in that: The buffer assembly includes a connecting plate, a buffer member and a guide column. The upper surface of the connecting plate is connected to the lifting assembly. The guide section of the guide column passes through the guide hole of the connecting plate and is connected to the back of the cover. The buffer member is located between the cover and the connecting plate.

6. A vacuum dryer according to claim 5, characterized in that: The buffer member is a buffer pad or a spring or a combination thereof.

7. A vacuum dryer according to claim 5, characterized in that: The lifting assembly includes a driver connected to the frame, a driving end of the driver is connected to the connecting plate, a guide assembly is arranged around the outer side of the driver, the guide assembly includes a guide seat and a guide rod slidably connected to each other, the guide seat is connected to the frame, and one end of the guide rod is connected to the connecting plate.

8. A vacuum dryer according to claim 1 or 3 or 4 or 5, characterized in that: The outer surface of the cover except the opening is provided with reinforcing ribs.

9. A vacuum dryer according to claim 1, characterized in that: The frame is located outside the workpiece placement fixture and is provided with an infrared radiation sensor electrically connected to the controller.

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