Precisely-controlled pneumatic door sealing device

Abstract

The utility model discloses an accurate control pneumatic door sealing device, which belongs to the technical field of sealing doors, and is characterized by comprising a vacuum freeze dryer, the front side of the vacuum freeze dryer is movably connected with an adjustable speed control door sealing mechanism, the inner side of the adjustable speed control door sealing mechanism is movably connected with a multi-stage sealing mechanism, and the inner side of the multi-stage sealing mechanism is movably connected with an air cylinder. The length of the cylinder barrel of the air cylinder of the pneumatic sealing door can be adjusted, so that the stroke distance of a piston rod is adjusted, and finally the opening and closing size and range of the pneumatic sealing door are limited and controlled; the disc bin door can be actively controlled through the servo motor, passive rotation and active control are combined, active control is carried out when the opening and closing speed needs to be controlled, passive rotation is carried out when control is not needed, and when the disc bin door is closed, the metal sealing structure on the outer side is closed. And the plastic sealing structure and the magnetic sealing structure on the inner side are combined for sealing.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of sealing door, especially a kind of precision control's pneumatic door sealing device. BACKGROUND

[0002] As a kind of equipment with extremely high environmental requirements, the sealing property and reliability of the sealing door of vacuum freeze dryer directly affect the freeze drying process, and the pneumatic door sealing technology emerges as the times require, for example, the pneumatic door sealing system used in a certain type of vacuum freeze dryer, which provides power through air cylinder, and precisely controls the opening and closing and sealing of door plate, compared with traditional methods, the pneumatic door sealing instance has remarkable beneficial effects: first, the sealing performance is good, which can effectively maintain the vacuum environment in the freeze dryer;Second, it is easy to operate and can realize automatic control, reducing labor cost;Third, it has strong stability, reduces the probability of failure, and guarantees the efficient and stable operation of vacuum freeze dryer, greatly improving production efficiency and product quality.

[0003] In the prior art, the opening and closing of the sealing door is realized by motor-driven gear or chain wheel between the cooling body and the sealing door, and then the pre-tightening locking is realized by manually setting the lock catch on the cooling body and the sealing door, which is not only troublesome, but also requires a high working environment, and is easy to cause electric shock with slight carelessness, and the manual pre-tightening locking is too troublesome and has low automation degree.

[0004] In view of the above problems, the existing patent (publication number: CN206409135U) proposes a kind of precision control's pneumatic door sealing device, track is equipped with the fixed track in the upper of sealing door with cooling machine body, drive cylinder is equipped with along track movement in track, connecting piece is equipped with between sealing door and drive cylinder, first pre-tightening mechanism and second pre-tightening mechanism for increasing the sealing property of sealing door and cooling machine body when drive cylinder drives sealing door to reach predetermined position are respectively equipped with on the left and right sides of cooling machine body and are connected with sealing door and cooling machine body, the utility model is easy and fast to operate and control, and has high efficiency, safety and reliability, high degree of automation, and good sealing effect.

[0005] In view of the above problems, the existing patent gives a solution, but when used in food production vacuum freeze dryer, the pneumatic door sealing required effect is relatively more compared with traditional pneumatic door sealing, for example, the opening angle and speed of vacuum freeze dryer need to be controlled after opening bin after processing, the opening and closing angle of opening needs to be increased when loading material, and the sealing property of pneumatic door sealing is required to be high, the opening and closing angle of traditional pneumatic door sealing is fixed, the sealing property is general, and it is difficult to complete vacuum freeze drying operation.

[0006] Therefore, a kind of precision control's pneumatic door sealing device is proposed. UTILITY MODEL CONTENTS

[0007] The utility model discloses a purpose lies in, provide a kind of precision control's pneumatic door sealing device, can solve the problem that existing pneumatic door sealing is difficult to accurately control rotation speed and open-close size.

[0008] To achieve the above object, the utility model provides following technical scheme: a kind of precision control's pneumatic door sealing device, including vacuum freeze dryer, the front side of the vacuum freeze dryer is movably connected with adjustable speed control door sealing mechanism, the inside of the adjustable speed control door sealing mechanism is movably connected with multistage sealing mechanism;

[0009] The adjustable speed control door sealing mechanism includes disc warehouse door, driving force arm, piston rod, bearing base and adjusting control component, the disc warehouse door is movably connected at the front side of vacuum freeze dryer, the driving force arm is movably connected at the front side of disc warehouse door, the driving force arm is rotatably connected at the outside of vacuum freeze dryer, the bearing base is fixedly connected at the top of vacuum freeze dryer, the adjusting control component is movably connected at the top of bearing base, the piston rod is movably connected at the inside of adjusting control component, the piston rod is movably connected at the outside of driving force arm.

[0010] Preferably, the outside of the disc warehouse door is fixedly connected with a metal seal sleeve, and the inside of the disc warehouse door and the vacuum freeze dryer is movably connected with a magnetic seal ring.

[0011] Preferably, the inside of the disc warehouse door is fixedly connected with a thermoplastic sealing block, the thermoplastic sealing block is arranged outside the front magnetic seal ring, the inside of the vacuum freeze dryer is provided with a sealing groove, the sealing groove is arranged outside the rear magnetic seal ring, and the thermoplastic sealing block is movably connected inside the sealing groove.

[0012] Preferably, the inside of the disc warehouse door is movably connected with a wheel disc type hot air blowing port, and the wheel disc type hot air blowing port is arranged outside the thermoplastic sealing block.

[0013] Preferably, the inside of the bearing base is fixedly connected with a servo motor, and the output end of the servo motor is fixedly connected with a rotating platform.

[0014] Preferably, the top of the rotating platform is fixedly connected with a nested telescopic cylinder, the piston rod is movably connected inside the nested telescopic cylinder, the front side of the nested telescopic cylinder is fixedly connected with a sliding support plate, the outside of the sliding support plate is threadedly connected with an electric screw rod, and the electric screw rod is fixedly connected to the top of the rotating platform.

[0015] Preferably, the bottom of the vacuum freeze dryer is fixedly connected with a base frame.

[0016] Preferably, the front side of the disc warehouse door is movably connected with a rotation rate sensor.

[0017] Preferably, the inside of the vacuum freeze dryer is movably connected with a vacuum gauge.

[0018] Preferably, the inside of the sealing groove is movably connected with a guide lubricating layer.

[0019] Compared with the prior art, the utility model has the beneficial effects that:

[0020] 1、The adjustable speed control door sealing mechanism can adjust the length of the cylinder barrel of the pneumatic door, thereby adjusting the stroke distance of the piston rod, finally realizing the limitation and control of the opening and closing size and range of the pneumatic door, and the bottom of the cylinder barrel base is no longer provided with a passive driving rotating platform, but can be actively controlled by a servo motor, so that passive rotation and active control are combined, when the opening and closing speed needs to be controlled, active control is performed, and when control is not needed, passive rotation is performed.

[0021] 2、The multistage sealing mechanism can complete multistage sealing when the disc bin door is closed, the metal sealing structure on the outside, the plastic sealing structure on the inside and the magnetic sealing structure are combined to seal, the sealing performance after the disc bin door is closed can be further improved, the plastic sealing structure material is thermoplastic material, the heating equipment can perform self-repairing to a certain extent, damage can be avoided, and the plastic sealing structure in the traditional structure needs to be frequently replaced. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is the overall structure diagram of the precise control pneumatic door sealing device of the utility model;

[0023] Figure 2 It is the overall structure diagram of the opening state of the pneumatic door sealing device of the utility model;

[0024] Figure 3 It is the overall structure diagram of the adjustable speed control mechanism of the utility model;

[0025] Figure 4 It is the overall structure diagram of the adjustable speed control mechanism of the utility model;

[0026] Figure 5 It is the overall structure diagram of the multistage sealing mechanism of the utility model.

[0027] In the figure, 1, vacuum freeze dryer; 2, adjustable speed control door sealing mechanism; 21, disc bin door; 22, driving force arm; 23, piston rod; 24, bearing base; 25, adjustment control assembly; 25a, servo motor; 25b, rotating platform; 25c, nested telescopic cylinder; 25d, sliding support plate; 25e, electric screw rod; 3, multi-stage sealing mechanism; 31, metal sealing sleeve ring; 32, magnetic sealing ring; 33, thermoplastic sealing block; 34, sealing groove; 35, wheel disc type hot air blowing port; 4, chassis; 5, rotation rate sensor; 6, vacuum gauge; 7, guide lubricating layer. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0029] Please refer to Figures 1-5 The utility model provides technical schemes:

[0030] A precision control pneumatic door sealing device, including vacuum freeze dryer 1, the front side of vacuum freeze dryer 1 is movably connected with adjustable speed control door sealing mechanism 2, the inner side of adjustable speed control door sealing mechanism 2 is movably connected with multi-stage sealing mechanism 3;

[0031] Adjustable speed control door sealing mechanism 2 includes disc bin door 21, driving force arm 22, piston rod 23, bearing base 24 and adjustment control assembly 25, disc bin door 21 is movably connected at the front side of vacuum freeze dryer 1, driving force arm 22 is movably connected at the front side of disc bin door 21, driving force arm 22 is rotatably connected at the outer side of vacuum freeze dryer 1, bearing base 24 is fixedly connected at the top of vacuum freeze dryer 1, adjustment control assembly 25 is movably connected at the top of bearing base 24, piston rod 23 is movably connected at the inner side of adjustment control assembly 25, piston rod 23 is movably connected at the outer side of driving force arm 22.

[0032] In the embodiment: through piston dry driving force arm 22 can make disc bin door 21 rotate and open and close, through adjustment control assembly 25 can adjust the rate of opening and closing and adjust the angle of opening and closing, through bearing base 24 can adjust control assembly to support.

[0033] Specifically, as Figure 1 , Figure 2 , Figure 5As shown, the outer side of the disc bin door 21 is fixedly connected with a metal sealing sleeve ring 31, and the inner side of the disc bin door 21 and the vacuum freeze dryer 1 are movably connected with a magnetic sealing ring 32.

[0034] Specifically, as shown in Figure 1 、 Figure 2 、 Figure 5 , the inner side of the disc bin door 21 is fixedly connected with a thermoplastic sealing block 33, the thermoplastic sealing block 33 is arranged on the outer side of the front magnetic sealing ring 32, the inner side of the vacuum freeze dryer 1 is provided with a sealing groove 34, the sealing groove 34 is arranged on the outer side of the rear magnetic sealing ring 32, and the thermoplastic sealing block 33 is movably connected to the inner side of the sealing groove 34.

[0035] Specifically, as shown in Figure 1 、 Figure 2 、 Figure 5 , the inner side of the disc bin door 21 is movably connected with a wheel disc type hot air blowing port 35, and the wheel disc type hot air blowing port 35 is arranged on the outer side of the thermoplastic sealing block 33.

[0036] In this embodiment: the outer side of the disc bin door 21 and the outer side of the vacuum freeze dryer 1 are butted and connected by the metal sealing sleeve ring 31 to form a first layer of sealing, the inner side of the bin door and the inner side of the machine are attracted to form a second layer of sealing by the magnetic sealing ring 32, and when closed, the thermoplastic sealing block 33 is extruded into the sealing groove 34 to complete a third layer of sealing to achieve a multi-stage sealing effect. After the disc bin door 21 is opened and closed to the maximum angle, the wheel disc type hot air blowing port 35 can heat the thermoplastic sealing block 33, which is made of thermoplastic material and can be self-repaired by heating to be repeatedly used and prolong the service life.

[0037] Specifically, as shown in Figure 1 、 Figure 2 , the inner side of the bearing base 24 is fixedly connected with a servo motor 25a, and the output end of the servo motor 25a is fixedly connected with a rotating platform 25b.

[0038] Specifically, as shown in Figure 5 、 Figure 3 , the top of the rotating platform 25b is fixedly connected with a nested telescopic cylinder 25c, the piston rod 23 is movably connected to the inner side of the nested telescopic cylinder 25c, the front side of the nested telescopic cylinder 25c is fixedly connected with a sliding support plate 25d, the outer side of the sliding support plate 25d is threadedly connected with an electric screw rod 25e, and the electric screw rod 25e is fixedly connected to the top of the rotating platform 25b.

[0039] In the embodiment: the electric screw rod 25e is started to pull the front side block of the nested telescopic cylinder 25c to move forward and backward, so as to adjust the length of the cylinder, and then control the pneumatic travel distance of the piston rod 23; when the piston rod 23 is injected in and out in the cylinder, it can drive the disc warehouse door 21 to open and close at different angles along the driving force arm 22; in the process of pushing the piston rod 23, the servo motor 25a drives the rotating platform 25b to rotate, replaces the corresponding stress generated by the piston rod 23 and the driving force arm 22 pushing, limits the rotating speed of the nested telescopic cylinder 25c, and realizes the accurate control of the speed and opening angle of the disc warehouse door 21.

[0040] Specifically, as shown in Figure 4 、 Figure 3 The bottom of the vacuum freeze dryer 1 is fixedly connected with a bottom frame 4.

[0041] Specifically, as shown in Figure 4 The front side of the disc warehouse door 21 is movably connected with a rotating speed sensor 5.

[0042] In the embodiment: the bottom frame 4 can support the vacuum freeze dryer 1, and the rotating speed sensor 5 can detect the opening and closing speed and pressure of the disc warehouse door 21.

[0043] Specifically, as shown in Figure 1 The inner side of the vacuum freeze dryer 1 is movably connected with a vacuum gauge 6.

[0044] Specifically, as shown in Figure 2 Figure 1 Figure 2 Figure 2 The inner side of the sealing groove 34 is movably connected with a guide lubricating layer 7.

[0045] In the example: the vacuum gauge 6 can adjust the sealing condition inside the vacuum freeze dryer 1, and the guide lubricating layer 7 can facilitate the clamping of the thermoplastic sealing block 33.

[0046] Working principle: Before closing and opening the disc door 21, the front block of the nested telescopic cylinder 25c can be pulled forward or backward by starting the electric screw 25e, thereby adjusting the length of the entire nested telescopic cylinder 25c, thereby achieving the adjustment of the pneumatic travel distance of the entire piston rod 23, and achieving the goal that when the piston rod 23 is moved forward and backward by injecting gas into the inner side of the nested telescopic cylinder 25c, the disc door 21 can be driven to open and close at different angles along the driving force arm 22, wherein the piston rod 23 is connected to the driving force arm 22 when it is pushed forward. The end will push the driving arm 22 to rotate, and the driving arm 22 will drive the disc bin door 21 to rotate outward to open. In the process of the rotation of the driving arm 22, the corresponding force will be fed back to the nested telescopic cylinder 25c to make the rotating platform 25b at the bottom rotate on the supporting base 24. At a special time point, such as when the bin needs to be opened within a short time after the processing is completed, it is necessary to drive the rotation of the rotating platform 25b through the servo motor 25a during the process of pushing by the piston rod 23, replacing the relative stress generated by the pushing of the piston rod 23 and the driving arm 22. The rotation speed of the nested telescopic cylinder 25c is limited, so as to achieve the effect of accurately controlling the speed and opening and closing angle of the disc door 21. In addition, during the rotation process, a rotation speed sensor is provided outside the disc door 21 to detect the speed and pressure values ​​to prevent accidents caused by too fast or too slow rotation. When the disc door 21 is closed, the metal sealing ring 31 on the outside of the disc door 21 will be connected with the outside of the vacuum freeze dryer 1 to achieve the first layer of sealing effect, and the magnetic sealing ring 32 on the inside of the sealing door will attract the magnetic sealing ring 32 on the inside of the vacuum freeze dryer 1. To achieve a two-layer seal, when closing, the thermoplastic sealing block 33 will be squeezed and stuck into the sealing groove 34 to complete the three-layer seal, thereby achieving a multi-stage sealing effect. After the disc door 21 opens and closes at the maximum angle, the thermoplastic sealing block 33 can be heated by the wheel-type hot air blast port 35. The thermoplastic sealing block 33 is a thermoplastic material and will undergo a certain degree of self-repair when heated, thereby achieving repeated use and extending the service life. When closing, the vacuum gauge 6 can be used to detect the sealing inside the vacuum freeze dryer 1 and then the freeze-drying operation can be carried out, thereby completing the sealing effect when closing.

[0047] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements 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. A precisely controlled pneumatic door sealing device, comprising a vacuum freeze dryer (1), characterized in that: The front side of the vacuum freeze dryer (1) is movably connected with an adjustable speed control sealing door mechanism (2), and the inner side of the adjustable speed control sealing door mechanism (2) is movably connected with a multi-stage sealing mechanism (3). The adjustable speed control sealing door mechanism (2) comprises a disc warehouse door (21), a driving force arm (22), a piston rod (23), a bearing base (24) and an adjustment control assembly (25), the disc warehouse door (21) is movably connected to the front side of the vacuum freeze dryer (1), the driving force arm (22) is movably connected to the front side of the disc warehouse door (21), the driving force arm (22) is rotatably connected to the outer side of the vacuum freeze dryer (1), the bearing base (24) is fixedly connected to the top of the vacuum freeze dryer (1), the adjustment control assembly (25) is movably connected to the top of the bearing base (24), and the piston rod (23) is movably connected to the inner side of the adjustment control assembly (25) and the outer side of the driving force arm (22).

2. A precision controlled pneumatic door sealing device according to claim 1, characterized in that: The outer side of the disc warehouse door (21) is fixedly connected with a metal sealing sleeve ring (31), and the inner sides of the disc warehouse door (21) and the vacuum freeze dryer (1) are movably connected with a magnetic sealing ring (32).

3. A precision controlled pneumatic door sealing device according to claim 2, characterized in that: The inner side of the disc warehouse door (21) is fixedly connected with a thermoplastic sealing block (33), the thermoplastic sealing block (33) is arranged on the outer side of the front magnetic sealing ring (32), the inner side of the vacuum freeze dryer (1) is provided with a sealing groove (34), the sealing groove (34) is arranged on the outer side of the rear magnetic sealing ring (32), and the thermoplastic sealing block (33) is movably connected to the inner side of the sealing groove (34).

4. A precision controlled pneumatic door sealing device according to claim 3, characterized in that: The inner side of the disc warehouse door (21) is movably connected with a wheel disc type hot air blowing port (35), and the wheel disc type hot air blowing port (35) is arranged on the outer side of the thermoplastic sealing block (33).

5. A precision controlled pneumatic door sealing device according to claim 1, characterized in that: The inner side of the bearing base (24) is fixedly connected with a servo motor (25a), and the output end of the servo motor (25a) is fixedly connected with a rotating platform (25b).

6. A precision controlled pneumatic door sealing device according to claim 5, characterized in that: The top of the rotating platform (25b) is fixedly connected with a nested telescopic cylinder (25c), the piston rod (23) is movably connected to the inner side of the nested telescopic cylinder (25c), the front side of the nested telescopic cylinder (25c) is fixedly connected with a sliding support plate (25d), the outer side of the sliding support plate (25d) is threadedly connected with an electric screw rod (25e), and the electric screw rod (25e) is fixedly connected to the top of the rotating platform (25b).

7. A precision controlled pneumatic door sealing device according to claim 1, characterized in that: The bottom of the vacuum freeze dryer (1) is fixedly connected with a base frame (4).

8. A precision controlled pneumatic door sealing device according to claim 1, characterized in that: The front side of the disc warehouse door (21) is movably connected with a rotating speed sensor (5).

9. A precision controlled pneumatic door sealing device according to claim 4, characterized in that: The inner side of the vacuum freeze dryer (1) is movably connected with a vacuum gauge (6).

10. A precision controlled pneumatic door sealing device according to claim 3, characterized in that: The inner side of the sealing groove (34) is movably connected with a guide lubricating layer (7).

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