阅读说明：本技术 一种真空干燥装置 (Vacuum drying device ) 是由 孙伏龙 曲德一 张玲玲 穆光雨 邵惠 王勇 于 2021-09-15 设计创作，主要内容包括：一种真空干燥装置,包括主体骨架、真空箱、前封门和后封门,真空箱前后方向安装于主体骨架内,真空箱为前后两侧开口结构,真空箱连接真空管路1；主体骨架上部前后两侧分别安装封门气缸,封门气缸的活塞杆下端连接前封门或后封门,前封门和后封门位置与真空箱前后侧开口相对应。本发明通过气缸控制密封门的升降及密封,通过磁流体密封实现辊道机传动机构与真空箱之间的密封,并且通过在真空箱内安装机动辊道实现工件的传输,整个装置自动化程度高、密封性好,保证了真空箱的真空度,提高了工作效率,提高了干燥效果。(A vacuum drying device comprises a main body framework, a vacuum box, a front sealing door and a rear sealing door, wherein the vacuum box is arranged in the main body framework in the front-rear direction and is of an opening structure at the front side and the rear side, and the vacuum box is connected with a vacuum pipeline 1; the front side and the rear side of the upper part of the main body framework are respectively provided with a door sealing cylinder, the lower end of a piston rod of the door sealing cylinder is connected with a front sealing door or a rear sealing door, and the positions of the front sealing door and the rear sealing door correspond to the front side opening and the rear side opening of the vacuum box. According to the invention, the lifting and sealing of the sealing door are controlled by the air cylinder, the sealing between the roller machine transmission mechanism and the vacuum box is realized by magnetic fluid sealing, and the transmission of workpieces is realized by installing the motorized roller way in the vacuum box, so that the whole device has high automation degree and good sealing property, the vacuum degree of the vacuum box is ensured, the working efficiency is improved, and the drying effect is improved.)

1. A vacuum drying device is characterized in that: the vacuum box comprises a main body framework (1), a vacuum box (3), a front sealing door (2) and a rear sealing door (7), wherein the vacuum box (3) is installed in the main body framework (1) in the front-rear direction, the vacuum box (3) is of an opening structure at the front side and the rear side, and the vacuum box (3) is connected with a vacuum pipeline (16); the front side and the rear side of the upper part of the main body framework (1) are respectively provided with a door sealing cylinder (21), the lower end of a piston rod of the door sealing cylinder (21) is connected with a front sealing door (2) or a rear sealing door (7), and the positions of the front sealing door (2) and the rear sealing door (7) correspond to the front side opening and the rear side opening of the vacuum box (3).

2. A vacuum drying apparatus according to claim 1, wherein: the lower end of a piston rod of the door sealing cylinder (21) is provided with a U-shaped connecting block (28), the upper end of a door driving lever (26) is arranged between two side plates of the U-shaped connecting block (28) through a pin shaft (29), the lower end of the door driving lever (26) is arranged on a door fixing block (210), the door fixing block (210) is arranged on the outer side of the front sealing door (2) or the rear sealing door (7), the middle part of the door driving lever (26) is arranged between the two side plates of a connecting seat (212) through a bolt (213), and the connecting seat (212) is fixed on a sliding fixing frame (22); a fixing frame guide rod (25) is longitudinally arranged on the main body framework (1) and positioned on the inner side of the sliding fixing frame (22).

3. A vacuum drying apparatus according to claim 2, wherein: two fixed shaft guide sleeves (27) are symmetrically arranged on two sides of the connecting seat (212) on the main body framework (1), the door fixed shaft (24) is arranged in the fixed shaft guide sleeves (27) through a bearing, and one end of the door fixed shaft (24) is connected with the front sealing door (2) or the rear sealing door (7).

4. A vacuum drying apparatus according to claim 1, wherein: the adjustable stop iron (23) is respectively installed at two ends of the lower side of the sliding fixing frame (22), and a stop bent plate (211) is installed on the main body framework (1) and is located at the lower part of the fixing frame guide rod (25) and corresponds to the adjustable stop iron (23).

5. A vacuum drying apparatus according to claim 1, wherein: the vacuum box is characterized in that fixing plates (34) used for fixing the vacuum box (3) on the main body framework (1) are installed on two sides of the lower portion of the box body (31) of the vacuum box (3), and sealing rings (33) are installed on the front opening edge and the rear opening edge of the box body (31) of the vacuum box (3) through end flanges (32).

6. A vacuum drying apparatus according to claim 1, wherein: the bottom in the vacuum box (3) is provided with a motorized roller way (6), a bottom plate (66) of the motorized roller way (6) is fixed on a box body (31) of the vacuum box (3), two sides of the bottom plate (66) are respectively and vertically provided with side plates (67), chain wheel shafts (65) are uniformly distributed and penetrate through the side plates (67) arranged on the two sides, rollers (64) are arranged on the chain wheel shafts (65) between the side plates (67) arranged on the two sides, one end of each chain wheel shaft (65) is provided with a transmission chain wheel (63), the transmission chain wheels (63) are arranged on the outer sides of the side plates (67), and the transmission chain wheels (63) are connected with a speed reducer transmission chain wheel (13) through chains; the upper parts of the side plates (67) at the two sides are respectively provided with a workpiece guide rod (61) through a guide rod fixing piece (68); the side plates (67) on the two sides are respectively provided with a position switch (62) at the rear part.

7. A vacuum drying apparatus according to claim 6, wherein: the speed reducer is characterized in that a gear (13) of the speed reducer is mounted at the front end of a transmission shaft (12), the rear end of the transmission shaft (12) is connected with a motor (8), a connecting flange (11) is mounted on the transmission shaft (12), the connecting flange (11) is fixed on the outer side of a box body (31) of the vacuum box (3), a magnetic fluid seal (9) is mounted on the transmission shaft (12) and positioned on the rear side of the connecting flange (11) through a bearing (95), one end of a non-magnetic seat (91) of the magnetic fluid seal (9) is fixedly mounted on the connecting flange (11), and an O-shaped ring (14) is mounted between the non-magnetic seat (9) and the connecting flange (11); a permanent magnet (92) is arranged in the non-magnetic seat (9), and a magnetic fluid (94) is arranged between the magnetic poles (93) of the permanent magnet (92).

8. A vacuum drying apparatus according to claim 1, wherein: the vacuum pipeline (16) is connected with the vacuum pump (5), and the vacuum pipeline (16) is provided with a filter (15), a vacuum control valve (4) and a vacuum release valve (17).

9. A vacuum drying apparatus according to claim 1, wherein: the vacuum box (3) is cylindrical or square.

Technical Field

The invention relates to the field of engine production equipment.

Background

In an engine production line, workpieces need to be dried after a cleaning process is finished, and the traditional drying equipment cannot achieve a good drying effect due to the complex structure of engine parts, so that the quality of products is influenced.

As the air pressure is reduced, the boiling point of water is reduced, and when a certain vacuum degree is reached, the normal-temperature water can be vaporized and evaporated. According to the principle, the vacuum drying technology is applied to a plurality of fields, and is widely adopted in the drying process of the engine production line due to high efficiency, but the existing vacuum drying device has low automation control degree and poor sealing, thereby influencing the vacuum degree.

Disclosure of Invention

In order to solve the problems of the existing vacuum drying device, the invention provides a vacuum drying device for an engine production line.

The technical scheme adopted by the invention for realizing the purpose is as follows: a vacuum drying device comprises a main body framework 1, a vacuum box 3, a front sealing door 2 and a rear sealing door 7, wherein the vacuum box 3 is installed in the main body framework 1 in the front-rear direction, the vacuum box 3 is of a structure with openings on the front side and the rear side, and the vacuum box 3 is connected with a vacuum pipeline 16; the front side and the rear side of the upper part of the main body framework 1 are respectively provided with a door sealing cylinder 21, the lower end of a piston rod of the door sealing cylinder 21 is connected with a front sealing door 2 or a rear sealing door 7, and the positions of the front sealing door 2 and the rear sealing door 7 correspond to the front side opening and the rear side opening of the vacuum box 3.

The lower end of a piston rod of the door sealing cylinder 21 is provided with a U-shaped connecting block 28, the upper end of a door driving lever 26 is arranged between two side plates of the U-shaped connecting block 28 through a pin shaft 29, the lower end of the door driving lever 26 is arranged on a door fixing block 210, the door fixing block 210 is arranged on the outer side of the front sealing door 2 or the rear sealing door 7, the middle part of the door driving lever 26 is arranged between two side plates of a connecting seat 212 through a bolt 213, and the connecting seat 212 is fixed on the sliding fixing frame 22; a fixing frame guide rod 25 is longitudinally arranged on the main body framework 1 and positioned on the inner side of the sliding fixing frame 22.

Two fixed shaft guide sleeves 27 are symmetrically arranged on two sides of the connecting seat 212 on the main body framework 1, the door fixed shaft 24 is arranged in the fixed shaft guide sleeves 27 through a bearing, and one end of the door fixed shaft 24 is connected with the front sealing door 2 or the rear sealing door 7.

The two ends of the lower side of the sliding fixing frame 22 are respectively provided with an adjustable stop iron 23, and a stop bent plate 211 is arranged on the main body framework 1 and is positioned at the lower part of the fixing frame guide rod 25 and corresponds to the adjustable stop iron 23.

Fixing plates 34 for fixing the vacuum box 3 on the main body framework 1 are installed on two sides of the lower part of the box body 31 of the vacuum box 3, and sealing rings 33 are installed on the front and rear opening edges of the box body 31 of the vacuum box 3 through end flanges 32.

The bottom in the vacuum box 3 is provided with a motorized roller way 6, a bottom plate 66 of the motorized roller way 6 is fixed on a box body 31 of the vacuum box 3, two sides of the bottom plate 66 are respectively and vertically provided with a side plate 67, a chain wheel shaft 65 is uniformly distributed and penetrates through the side plates 67 arranged on the two sides, a roller 64 is arranged on the chain wheel shaft 65 positioned between the side plates 67 on the two sides, one end of the chain wheel shaft 65 is provided with a transmission chain wheel 63, the transmission chain wheel 63 is arranged on the outer side of the side plate 67, and the transmission chain wheel 63 is connected with a speed reducer transmission chain wheel 13 through a chain; the upper parts of the side plates 67 on both sides are respectively provided with a workpiece guide rod 61 through a guide rod fixing part 68; the side plates 67 on both sides are respectively mounted to the position switches 62 at the rear.

The speed reducer gear 13 is mounted at the front end of the transmission shaft 12, the rear end of the transmission shaft 12 is connected with the motor 8, the transmission shaft 12 is provided with the connecting flange 11, the connecting flange 11 is fixed on the outer side of the box body 31 of the vacuum box 3, the magnetic fluid seal 9 is mounted on the transmission shaft 12 at the rear side of the connecting flange 11 through the bearing 95, one end of the non-magnetic seat 91 of the magnetic fluid seal 9 is fixedly mounted on the connecting flange 11, and the O-shaped ring 14 is mounted between the non-magnetic seat 9 and the connecting flange 11; the permanent magnet 92 is installed in the non-magnetic seat 9, and a magnetic fluid 94 is arranged between the magnetic poles 93 of the permanent magnet 92.

The vacuum pipeline 16 is connected with the vacuum pump 5, and the filter 15, the vacuum control valve 4 and the vacuum release valve 17 are arranged on the vacuum pipeline 16.

The vacuum box 3 is cylindrical or square.

According to the vacuum drying device, the air cylinder controls the lifting and sealing of the sealing door, the magnetic fluid seal is used for realizing the sealing between the roller machine transmission mechanism and the vacuum box, and the motorized roller way is arranged in the vacuum box for realizing the transmission of workpieces, so that the whole device is high in automation degree and good in sealing property, the vacuum degree of the vacuum box is guaranteed, the working efficiency is improved, and the drying effect is improved.

Drawings

FIG. 1 is a perspective view of a vacuum drying apparatus according to the present invention.

FIG. 2 is a perspective view of the vacuum drying apparatus according to the present invention.

FIG. 3 is a perspective view of a vacuum chamber of the vacuum drying apparatus of the present invention.

FIG. 4 is a structural view of a motorized roller table of the vacuum drying apparatus of the present invention.

Fig. 5 is a structural view of the motor and the magnetic fluid sealing part of the invention.

FIG. 6 is a sectional view of the magnetic fluid seal of the present invention.

FIG. 7 is a front view of the vacuum drying apparatus according to the present invention in a state where the sealing door is opened.

FIG. 8 is a front view of the vacuum drying apparatus according to the present invention in a state where the sealing door is closed.

FIG. 9 is a partial block diagram of the vacuum pump and vacuum lines of the present invention.

Fig. 10 is a schematic diagram of the vacuum drying apparatus system of the present invention.

In the figure: 1. a main body framework, 2, a front sealing door, 21, a sealing door cylinder, 22, a sliding fixing frame, 23, an adjustable stop iron, 24, a door fixing shaft, 25, a fixing frame guide rod, 26, a fixing frame guide rod, 27, a fixing shaft guide sleeve, 28, a U-shaped connecting block, 29, a pin shaft, 210, a door fixing block, 211, a stop bent plate, 212, a connecting seat, 213, a bolt, 3, a vacuum box, 31, a box body, 32, an end flange, 33, a sealing ring, 34, a fixing plate, 35, a vacuum tube connecting hole, 4, a control ball valve, 5, a vacuum pump, 6, a motorized roller way, 61, a workpiece guide rod, 62, a position switch, 63, a roller way driving chain wheel, 64, a roller wheel, 65, a chain wheel shaft, 66, a bottom plate, 67, a side plate, 68, a guide rod fixing part, 7, a rear sealing door, 8, a motor, 9, a magnetic fluid seal, 91, a non-magnetic seat, 92, a permanent magnet, 93 and a magnetic pole, 94. the device comprises a magnetic fluid 95, a bearing 10, a workpiece 11, a connecting flange 12, a transmission shaft 13, a speed reducer transmission chain wheel 14, an O-shaped ring 15, a filter 16, a vacuum pipeline 17 and a vacuum relief valve.

Detailed Description

The structure of the vacuum drying device is shown in fig. 1 and fig. 2, and the vacuum drying device comprises a main body framework 1, a vacuum box 3, a maneuvering roller way 6, a front door sealing device, a rear door sealing device, a vacuum pump 5, a vacuum control ball valve 4, a motor 8, a magnetic fluid seal 9 and the like. The main body framework 1 is an integral structure welded by section steel and is used for bearing various functional components.

The vacuum box 3 is installed in the main body framework 1 in the front-back direction, the structure of the vacuum box is as shown in fig. 3, a steel plate welded sealed box body 31 is adopted, end flanges 32 are arranged at two ends of the sealed box body 31, sealing rings 33 are embedded at the front and back opening edges of the box body 31 of the vacuum box 3 through the end flanges 32, the vacuum box 3 is of a front-back two-side opening structure, the vacuum box 3 is connected with a vacuum pipeline 16, and fixing plates 34 used for fixing the vacuum box 3 on the main body framework 1 are installed at two sides of the lower portion of the box body 31 of the vacuum box 3. The vacuum box may be cylindrical or square as the case may be, and is illustrated as a square box. The cylindrical box body is better in stress condition, and the square box body saves space.

The bottom in the vacuum box 3 is provided with a motorized roller way 6, a bottom plate 66 of the motorized roller way 6 is fixed on a box body 31 of the vacuum box 3, two sides of the bottom plate 66 are respectively and vertically provided with a side plate 67, a chain wheel shaft 65 is uniformly distributed and penetrates through the side plates 67 arranged on the two sides, a roller 64 is arranged on the chain wheel shaft 65 positioned between the side plates 67 on the two sides, one end of the chain wheel shaft 65 is provided with a transmission chain wheel 63, the transmission chain wheel 63 is arranged on the outer side of the side plate 67, and the transmission chain wheel 63 is connected with a speed reducer transmission chain wheel 13 through a chain; the upper parts of the side plates 67 on both sides are respectively provided with a workpiece guide rod 61 through a guide rod fixing part 68; the side plates 67 on both sides are respectively mounted to the position switches 62 at the rear. The motorized roller bed 6 is a PZR roller bed, is arranged in a vacuum box and is used for conveying workpieces, and the front end and the rear end of the motorized roller bed are in butt joint with a user roller bed, so that the online automation is realized. The motorized roller way is driven by a double-chain wheel, a workpiece 10 is supported by a row of rollers, the workpiece is guided by a workpiece guide rod 68 to move on the rollers 64, the in-place detection switch 62 confirms that the workpiece 10 is in place, and the motorized roller way stops.

The driving motor reducer 8 is installed outside the vacuum box body 31, and power is transmitted to the maneuvering roller way 6 in the vacuum box through the magnetic fluid seal 9, so that roller way power transmission is completed. As shown in fig. 5, a reducer gear 13 is mounted at the front end of a transmission shaft 12, the rear end of the transmission shaft 12 is connected with a motor 8, a connecting flange 11 is mounted on the transmission shaft 12, the connecting flange 11 is fixed at the outer side of a box body 31 of a vacuum box 3, a magnetic fluid seal 9 is mounted on the transmission shaft 12 at the rear side of the connecting flange 11 through a bearing 95, one end of a non-magnetic seat 91 of the magnetic fluid seal 9 is fixedly mounted on the connecting flange 11, and an O-ring 14 is mounted between the non-magnetic seat 9 and the connecting flange 11; the permanent magnet 92 is installed in the non-magnetic seat 9, and a magnetic fluid 94 is arranged between the magnetic poles 93 of the permanent magnet 92. The sealing principle of the magnetic fluid is as follows: the magnetic fluid sealing technology is developed on the basis of magnetic fluid, and when the magnetic fluid is injected into a magnetic field gap, the magnetic fluid can fill the whole gap to form a liquid O-shaped sealing ring. The function of the magnetic fluid seal 9 is to transmit the rotary motion into the sealed container vacuum box 3, which is very suitable for vacuum sealing, and the basic principle is shown in figure 6: the magnetic fluid seal 9 fills the magnetic fluid 94 in the set space under the action of the uniform stable magnetic field, and establishes a multi-stage O-shaped sealing ring, thereby achieving the sealing effect. Each stage of sealing ring can bear the pressure difference of more than 0.15-0.2 atmosphere generally, the total pressure bearing is the sum of the pressure differences of all stages, 2.5 atmospheres are generally selected, and the requirement of vacuum sealing is completely met.

An on-line vacuum drying device generally adopts a through type structure in order to adapt to the beat of a production line, so that the vacuum drying device is provided with a front sealing door and a rear sealing door. The structure of the door sealing device is shown in fig. 7 and 8, a door sealing cylinder 21 is respectively arranged on the front side and the rear side of the upper part of a main body framework 1, a U-shaped connecting block 28 is arranged at the lower end of a piston rod of the door sealing cylinder 21, the upper end of a door driving lever 26 is arranged between two side plates of the U-shaped connecting block 28 through a pin shaft 29, the lower end of the door driving lever 26 is arranged on a door fixing block 210, the door fixing block 210 is arranged on the outer side of a front sealing door 2 or a rear sealing door 7, the middle part of the door driving lever 26 is arranged between the two side plates of a connecting seat 212 through a bolt 213, and the connecting seat 212 is fixed on a sliding fixing frame 22; the main body framework 1 is longitudinally provided with a fixed frame guide rod 25 at the inner side of the sliding fixed frame 22, and the sliding fixed frame 22 can slide up and down on 2 fixed frame guide rods 25 under the driving of the hinged cylinder 21. Two fixed shaft guide sleeves 27 are symmetrically arranged on two sides of the connecting seat 212 on the main body framework 1, the door fixed shaft 24 is arranged in the fixed shaft guide sleeves 27 through a bearing, one end of the door fixed shaft 24 is connected with the front sealing door 2 or the rear sealing door 7, the positions of the front sealing door 2 and the rear sealing door 7 correspond to the front and rear openings of the vacuum box 3, the sealing door 2 or the sealing door 7 is in floating connection with the sliding fixing frame 22, and the sliding door can slide back and forth under the action of the door driving lever 26. The two ends of the lower side of the sliding fixing frame 22 are respectively provided with an adjustable stop iron 23, and a stop bent plate 211 is arranged on the main body framework 1 and is positioned at the lower part of the fixing frame guide rod 25 and corresponds to the adjustable stop iron 23.

The action principle of the sealing door is as follows:

the front sealing door and the rear sealing door are in an opened original position state, and a safety gap is reserved between the front sealing door 2 or the rear sealing door 7 and the vacuum box sealing ring 33, so that the sealing ring 33 is prevented from being scratched when the doors move.

When a command is obtained and a door needs to be sealed, the door sealing cylinder 21 acts, the piston rod extends out, the sliding fixing frame 22 drives the front sealing door 2 or the rear sealing door 7 to slide downwards along the fixing frame guide rod 4 under the action of self weight, the posture of the front sealing door 2 or the rear sealing door 7 keeps unchanged, when the adjustable stop iron 23 is in contact with the stop bent plate 211, the front sealing door 2 or the rear sealing door 7 stops sliding downwards, the piston rod of the door sealing cylinder 21 continues to move downwards to enable the door driving lever 26 to rotate around the pin shaft 29, the rear end of the driving lever 26 drives the front sealing door 2 or the rear sealing door 7 to move inwards and tightly press the vacuum box sealing ring 33, and the door in floating connection can be effectively attached to the sealing ring 33. When a door opening instruction is obtained, the door sealing cylinder 21 acts, the piston rod retracts to drive the door driving lever 26 to rotate, the rear end of the driving lever 26 drives the front sealing door 2 or the rear sealing door 7 to move backwards and to be away from the vacuum box sealing ring 33 by a certain distance, and a safety gap is formed between the front sealing door 2 or the rear sealing door 7 and the vacuum box sealing ring 33 at the moment. The piston rod continues to retract into the door driving lever 26 to be clamped by the connecting seat 212, so as to drive the sliding fixing frame 22 and the front sealing door 2 or the rear sealing door 7 to move upwards together, and the door is completely opened to finish the door opening action.

As shown in fig. 9 and 10, a vacuum pipeline 16 is connected with a vacuum pump 5, a filter 15, a vacuum control valve 4 and a vacuum release valve 17 are arranged on the vacuum pipeline 16, the vacuum pipeline is used for connecting a vacuum box and the vacuum pump, the pneumatic ball valve is used for controlling the vacuum pumping and the vacuum release, and a filter is additionally arranged at a suction port of the vacuum pump to prevent scrap iron and foreign matters from being sucked into the vacuum pump; the suction port of the vacuum box is arranged at the upper position of the side surface or at the top of the vacuum box, so that accumulated water at the bottom of the vacuum box is prevented from being pumped into the vacuum pump. The bottom of the vacuum box is provided with a accumulated water discharge valve for discharging accumulated water regularly. The length of the vacuum pipeline is as short as possible, and if the length of the vacuum pipeline is too long, the pumping speed of the vacuum pump is influenced, and the vacuum degree cannot be quickly reached. The vacuum pump 5 is a core component of the vacuum drying device, and the vacuum pump is selected to meet the requirements of the production line. In order to ensure the vacuum drying effect of the workpiece, the workpiece needs to be pretreated before being subjected to vacuum drying, and the workpiece cannot be subjected to vacuum box treatment with too much water. The general treatment method is as follows: and (5) overturning to pour water and blowing water by an air knife. The selection of the vacuum pump follows the following principles: A. pumping speed of a vacuum pump: the pumping speed of the vacuum pump determines the time for reaching the rated vacuum degree, and the pumping speed of the vacuum pump is generally selected to be more than or equal to 200m3/h in an engine production line to meet the requirement of production line rhythm; B. vacuum degree: the vacuum degree of the vacuum pump is selected according to a 'saturated steam pressure table of water'. For example, at a temperature of 20 ℃ the water has a vaporisation pressure of 23.3 mbar. At the moment, the vacuum degree of the vacuum pump is selected to be less than 20mbar, so that the vacuum effect can be ensured.