A safety autoclave door seal

Abstract

The utility model discloses a kind of safety autoclave door seal device, including sealing door, lifting screw rod, first guide rail, second limit guide rail, sealed gas pipe and light curtain sensor, the utility model uses lifting screw rod to drive sealing door to rise and descend, simple structure, need not compressed gas source;The utility model uses the first guide rail and the second limit guide rail to guide the rise and descent of sealing door, to eliminate the influence of the shaking of sealing door and high gas pressure to the thrust outward, guarantee the verticality and smooth degree of rise and descent of sealing door;The utility model uses sealed gas pipe to seal cabin body opening and sealing door, sealing performance is good, gas pressure tester is also set to monitor the gas pressure of sealed gas pipe in real time;The utility model increases light curtain sensor to detect whether there is foreign matter obstruction in sealing door rising path.

Description

Technical Field

[0001] This utility model belongs to the field of sterilization equipment technology, specifically relating to a safe high-pressure sterilizer door sealing device. Background Technology

[0002] Autoclaves are mainly used in the pharmaceutical and biological production research fields, and consist of a sterilization chamber and a sealing door. Horizontal autoclaves primarily consist of a sterilization chamber and a sealing door. The closure and sealing performance between the sterilization chamber and the sealing door are key factors affecting the sterilization effect of the equipment. Currently, the closure and sealing of horizontal autoclaves and their sealing doors are mainly accomplished in two ways: 1. Closing is achieved by a cylinder lifting the sealing door; 2. Sealing is achieved by releasing compressed gas from the air outlet in the groove on the outer edge of the chamber to lift the rubber strip ring inside the groove (without inflating the rubber strip itself), causing the rubber strip ring to fit tightly against the sealing door to achieve a seal. The existing technology has the following drawbacks in long-term practical use:

[0003] Because a single cylinder is used to lift the sealing door vertically, the sealing door is prone to instability during movement, swaying and jerking from side to side, or even scratching and jamming.

[0004] During the process of the cylinder lifting the sealing door, an unstable air supply or abnormal cylinder malfunction can cause the sealing door to frequently fail to open and close smoothly, and sometimes it may suddenly fall down, which can easily lead to safety accidents.

[0005] The uniformity and stability of the compressed gas filling in the groove also affect the sealing performance between the rubber strip ring and the sealing door. At the same time, there is no alarm or supplementary measures for abnormal gas pressure in the groove.

[0006] During the upward closing process of the airtight door, there is a problem that foreign objects may be blocked and cannot be detected, which may easily trap foreign objects and cause safety accidents. Utility Model Content

[0007] The purpose of this invention is to provide a safe high-pressure sterilizer door sealing device to address the aforementioned problems in the existing technology.

[0008] The above-mentioned objectives of this utility model are achieved through the following technical means:

[0009] A safety autoclave door sealing device includes a sealing door, a second support arm, a second limiting guide rail, a second fixing structure, a lifting screw, and a driving device. The sealing door is provided with a vertical threaded hole adapted to the external thread of the lifting screw. The sealing door is threadedly mounted on the lifting screw, and the bottom of the lifting screw is connected to the lifting driving device. The left and right outer edges of the outer side of the sealing door are provided with second limiting guide rails, which are connected to the second support arm through the second fixing structure. One end of the second support arm is fixedly connected to the autoclave chamber.

[0010] The second fixing structure includes a second countersunk hole and a second through hole, a second screw, a second fixing nut, and a second fine-tuning nut. The second countersunk hole is opened on the second limiting guide rail, and the second through hole is opened on the second support arm. The second screw passes through the second through hole and the second fixing nut and extends into the second countersunk hole. Then, the second fixing nut is tightened on the second limiting guide rail. The second fine-tuning nuts are provided on both sides of the second through hole of the second support arm. Tightening the second fine-tuning nuts fixes the second screw to the second support arm.

[0011] A safety high-pressure sterilizer door sealing device further includes a first support arm and a first guide rail. The first guide rail is provided on both the left and right sides of the sealing door. Multiple rollers are provided on the left and right sides of the sealing door, which are evenly distributed vertically. The rollers on the left and right sides of the sealing door are respectively set in the first guide rails on the corresponding sides. The first guide rail is connected to the first support arm through a first fixing structure. One end of the first support arm is fixedly connected to the sterilizer chamber.

[0012] The first fixing structure includes a first countersunk hole and a first through hole in the transverse direction, a first screw, a first fixing nut, and a first fine-tuning nut. The first countersunk hole is opened on the first guide rail, and the first through hole is opened on the first support arm. The first screw passes through the first through hole and the first fixing nut of the first support arm and extends into the first countersunk hole of the first guide rail. Then the first fixing nut is tightened on the first guide rail. The first fine-tuning nuts are provided on both sides of the first through hole of the first support arm. Tightening the first fine-tuning nuts fixes the first screw to the first support arm.

[0013] As described above, the outer edge of the opening of the sterilizer chamber is provided with interconnected grooves, and all the grooves together form an annular placement groove. The annular sealing air pipe is fixedly installed in the placement groove, and an air nozzle is provided on the sealing air pipe. The sealing air pipe is also connected to a pressure tester.

[0014] As described above, there are multiple first support arms and multiple second support arms. The multiple first support arms and multiple second support arms are evenly arranged in the vertical direction. The multiple first support arms are connected to the first guide rail through the first fixing structure, and the multiple second support arms are connected to the second limiting guide rail through the second fixing structure.

[0015] As described above, the lifting drive device includes an external base and a motor and a speed reduction and steering device disposed inside the external base. The speed reduction and steering device includes a speed reducer and a steering gear. The input shaft of the speed reducer is connected to the output shaft of the motor, the output shaft of the speed reducer is connected to the steering gear, and the bottom of the lifting screw is connected to the output shaft of the steering gear.

[0016] A safety high-pressure sterilizer door sealing device also includes light curtain sensors. Light curtain sensors are installed on both the left and right sides of the sealing door, and the light curtain sensors are fixedly connected to the sterilizer chamber.

[0017] As described above, an extension baffle is provided at the top of the cabin opening, an upper limit switch is provided at the bottom of the extension baffle, and a lower limit switch is provided at the top of the external base.

[0018] A safety high-pressure sterilizer door sealing device further includes a horizontal safety railing and multiple observation windows. The multiple observation windows are installed on the sealed door, and the safety railing is installed at a set height above the external base and located outside the sealed door. The safety railing is fixedly connected to the sterilizer chamber.

[0019] Compared with the prior art, this utility model has the following advantages:

[0020] (1) This utility model uses a lifting screw to drive the sealing door to rise and fall, which is simple in structure and does not require a compressed air source;

[0021] (2) The present invention uses a first guide rail to guide the rising and falling of the sealing door, thereby reducing the verticality of the rising and falling of the sealing door and ensuring the smoothness of the rising and falling. The verticality and smoothness of the rising and falling of the sealing door can also be adjusted by adjusting the first fine-tuning nut.

[0022] (3) The present invention uses a second limiting guide rail to further eliminate the shaking of the sealing door, and can also eliminate the influence of the high air pressure outward thrust on the rising and falling of the sealing door; the gap between the second limiting guide rail and the sealing door, as well as the verticality and smoothness of the rising and falling of the sealing door, can also be adjusted by adjusting the second fine-tuning nut.

[0023] (4) This utility model uses a sealed air pipe to seal the cabin opening and the sealed door, which has good sealing performance. It also sets up an air pressure tester to monitor the air pressure of the sealed air pipe in real time.

[0024] (5) This utility model adds a light curtain sensor to detect whether there are foreign objects blocking the rising path of the sealed door, so as to prevent accidents from happening. Attached Figure Description

[0025] Figure 1 This is the front view of this utility model;

[0026] Figure 2 This is a schematic diagram of the structure of the sealing air tube of this utility model;

[0027] Figure 3 This is a schematic diagram of the structure of the first guide rail, the first support arm, and the sealing door connection of this utility model (wherein, the second limiting guide rail connected to the second support arm is not shown).

[0028] Figure 4 This is a schematic diagram of the drive device of this utility model;

[0029] Figure labels and corresponding component names:

[0030] 1-Hatch opening; 2-Sealed door; 3-Fixed support arm; 4-Light curtain sensor; 5-First guide rail; 6-Second limit guide rail; 7-Extended baffle; 8-Upper limit switch; 9-Lifting screw; 10-Lower limit switch; 11-Drive device; 12-Safety railing; 13-Observation window; 14-First support arm; 15-Second support arm; 16-Roller; 17-First fixing nut; 18-First fine-tuning nut; 19-First screw; 20-External base; 21-Motor; 22-Reducer; 23-Steering device; 24-Placement slot; 25-Sealed air pipe; 26-Air nozzle; 27-Air pressure tester; 28-First countersunk hole. Detailed Implementation

[0031] To facilitate understanding and implementation of this utility model by those skilled in the art, the present utility model will be further described in detail below with reference to embodiments. The embodiments described herein are only for illustration and explanation and are not intended to limit the present utility model.

[0032] Example 1:

[0033] A safety autoclave door sealing device includes a sealing door 2, a fixed support arm 3, a first guide rail 5, a second fixing structure, a second limiting guide rail 6, two lifting screws 9, and a drive device 11. The sealing door 2 has two parallel vertical threaded holes, both of which are adapted to the external threads of the lifting screws 9. The sealing door 2 is mounted on the lifting screws 9 through the two threaded holes. The bottom of the lifting screws 9 is connected to the lifting drive device 11, which can drive the lifting screws 9 to rotate, thereby causing the sealing door 2 to rise or fall along the lifting screws 9. The fixed support arm 3 includes a first support arm 14 and a second support arm 15. The outer side of the sealing door 2 ( In this embodiment, the inner side of the sealing door 2 (the side opposite to the opening 1 of the chamber is the inner side, and the other side is the outer side) is provided with second limiting guide rails 6 at both the left and right outer edges. The second limiting guide rails 6 are connected to the second support arm 15 through the second fixing structure. One end of the second support arm 15 is fixedly connected to the sterilizer chamber. The left and right sides of the sealing door 2 are provided with first guide rails 5. The left and right sides of the sealing door 2 are provided with multiple rollers 16 evenly distributed vertically. The rollers 16 on the left and right sides of the sealing door 2 are respectively set in the first guide rails 5 on the corresponding sides. The first guide rails 5 are connected to the first support arm 14 through the first fixing structure. One end of the first support arm 14 is fixedly connected to the sterilizer chamber.

[0034] The first fixing structure includes a first countersunk hole 28 and a first through hole, a first screw 19, a first fixing nut 17, and a first fine-tuning nut 18. The first countersunk hole 28 is opened on the first guide rail 5, and the first through hole is opened on the first support arm 14. The first screw 19 passes through the first through hole and the first fixing nut 17 of the first support arm 14 in sequence and extends into the first countersunk hole 28 of the first guide rail 5. The first fixing nut 17 is then tightened on the first guide rail 5. The first fine-tuning nuts 18 are provided on both sides of the first through hole of the first support arm 14. Tightening the first fine-tuning nuts 18 fixes the first screw 19 to the first support arm 14.

[0035] In this invention, the sealing door 2 and the lifting screw 9 are connected by threads. Since the threaded connection between the lifting screw 9 and the sealing door 2 is not completely tight, there is a certain gap between the mechanical structures, and there is also a certain degree of wobble between the threads. Furthermore, the sealing door 2 has a significant weight, resulting in some wobble during its vertical movement due to unevenness on the guide rails and natural gaps between the teeth. This invention uses two first guide rails 5 to guide the rising and falling of the sealing door 2, thereby reducing the verticality of the sealing door 2 during rising and falling and ensuring smoothness. This invention can also adjust the verticality and smoothness of the sealing door 2 during rising and falling by loosening the first fine-tuning nuts 18 on both sides of the first through hole, thereby fine-tuning the gap between the first guide rail 5 and the sealing door 2.

[0036] The second fixing structure includes a second countersunk hole and a second through hole, a second screw, a second fixing nut, and a second fine-tuning nut. The second countersunk hole is opened on the second limiting guide rail 6, and the second through hole is opened on the second support arm 15. The second screw passes through the second through hole and the second fixing nut of the second support arm 15 in sequence and extends into the second countersunk hole of the sealing door 2. Then the second fixing nut is tightened on the second limiting guide rail 6. The second fine-tuning nuts are provided on both sides of the second through hole of the second support arm 15. Tightening the second fine-tuning nuts fixes the second screw to the second support arm 15.

[0037] Since the swaying space of the sealing door 2 as it moves along the lifting screw 9 is very important for the sealing performance of the high-pressure container, when the sterilization chamber is filled with high-pressure gas, there will be an outward pushing force on the sealing door 2. The outward pushing force and the swaying of the sealing door 2 will have a negative impact on the sealing performance. In addition to ensuring the verticality and smoothness of the rising and falling through the first guide rail 5, this utility model also sets a second limiting guide rail 6 on the outside of the sealing door 2 to further eliminate the swaying of the sealing door 2 and also eliminate the influence of the outward pushing force on the rising and falling of the sealing door 2. Similarly, the second limiting guide rail 6 is provided with a second fine-tuning nut. By loosening the second fine-tuning nuts on both sides of the second through hole, the verticality of the second guide rail can be finely adjusted, thereby adjusting the verticality and smoothness of the rising and falling of the sealing door 2.

[0038] As one possible implementation, there are three first support arms 14 and three second support arms 15. The three first support arms 14 and the three second support arms 15 are evenly arranged in the vertical direction. The three first support arms 14 are all connected to the first guide rail 5 through the first fixing structure, and the three second support arms 15 are all connected to the second limiting guide rail 6 through the second fixing structure.

[0039] The sterilizer chamber has interconnected grooves along its outer edge at the opening 1, forming an annular placement groove 24. An annular sealing air pipe 25 is fixedly installed in the placement groove 24. An air nozzle 26 is attached to the sealing air pipe 25, which is also connected to a pressure testing instrument 27. When the sealing door 2 rises to the designated position, air is introduced into the sealing air pipe 25 through the air nozzle 26, and the pressure in the sealing air pipe 25 is monitored by the pressure testing instrument 27 until the pressure reaches the set pressure. This invention allows for real-time monitoring and display during the inflation and sealing process. The pressure inside the sealing air tube 25 is adjusted so that when the pressure tester 27 shows insufficient pressure during the sealing process, air is promptly added to the sealing air tube 25 to achieve the sealing requirement. Existing technical solutions often use non-inflatable air tubes filled in the groove, and steam is blown into the air holes in the groove wall to push the non-inflatable air tube tightly against the inside of the sealing door 2. Compared with the existing technology, the solution of this utility model can achieve the sealing requirement by tightly adhering the sealing air tube 25 to the inside of the sealing door 2. At the same time, it also has a pressure abnormality feedback mechanism and pressure abnormality compensation measures, which is more complete and safer than the existing technical solutions.

[0040] The lifting drive device 11 includes an external base 20 and a motor 21 and two sets of deceleration and steering devices disposed inside the external base 20. The deceleration and steering devices include a reducer 22 and a steering gear 23. The input shafts of the reducers 22 of the two sets of deceleration and steering devices are respectively connected to the two output shafts of the motor 21, and the output shafts of the reducers 22 of the two sets of deceleration and steering devices are respectively connected to the steering gear 23 of the corresponding deceleration and steering devices. The bottoms of the two lifting screws 9 are respectively connected to the output shafts of the two steering gears 23. In this embodiment, the motor 21 is a dual-shaft motor, and the speed can be adjusted by the two reducers 22. The steering gear 23 converts the lateral rotation of the output shaft of the motor 21 into vertical rotation, and drives the two lifting screws 9 to rotate synchronously, at the same speed and in the same direction, thereby realizing the vertical and smooth vertical movement of the sealing door 2. Compared with the existing cylinder or belt drive scheme for realizing the vertical movement of the sealing door 2, the present invention has the advantages of high efficiency, timely start and stop response, smooth and stable movement without shaking, the screws bearing the weight of the sealing door 2, and simple troubleshooting.

[0041] It also includes light curtain sensors 4. Light curtain sensors 4 are installed on both the left and right sides of the sealed door 2. The light curtain sensors 4 are fixedly connected to the sterilizer chamber. Before the sealed door 2 rises, the light curtain sensors 4 can detect whether there are any foreign objects in the rising path of the sealed door 2. The light curtain sensors 4 can be placed offset from the first guide rail 5 (e.g., side-by-side, as long as the first guide rail 5 does not block the light curtain sensors 4), and the light curtain sensors 4 are located closer to the chamber opening 1. This utility model... Figure 1 The light curtain sensor 4 shown is on the left side of the first guide rail 5, but it is actually placed off-center from the first guide rail 5 so that the first guide rail 5 does not block the light curtain sensor 4.

[0042] An extension baffle 7 is provided at the top of the cabin opening 1, an upper limit switch 8 is provided at the bottom of the extension baffle 7, and a lower limit switch 10 is provided at the top of the external base 20.

[0043] It also includes two observation windows 13, which are respectively located at the upper and lower parts of the sealed door 2. In this embodiment, the height of the items stacked inside the sterilizer chamber can be seen through the upper observation window 13. Since there may be sediment or cooling water at the bottom of the sterilizer chamber after sterilization or when the sterilizer is not drained completely, opening the door under unknown circumstances will cause the liquid or cooling water to flow out to the ground and lower surface outside the sterilizer chamber, causing contamination. In this embodiment, an observation window 13 is also provided at the lower part of the sealed door 2 to facilitate observation of whether there are sediments such as cooling water or liquid at the bottom of the sterilizer chamber.

[0044] It also includes a horizontal safety railing 12, which is set at a set height above the outer base 20 and located outside the sealed door 2. The safety railing 12 is fixedly connected to the sterilizer chamber. When the sealed door 2 is lowered to be fully opened, the safety railing 12 catches the sealed door 2 from the outside to play a role in preventing tipping.

[0045] In a preferred embodiment of the present invention, a controller is also included. The controller receives the feedback signal of the air pressure output by the air pressure tester 27 of the sealing air tube 25, thereby monitoring the air pressure in the sealing air tube 25 in real time during the sealing process, and replenishing the air to the sealing air tube 25 in a timely manner when the air pressure is insufficient during the sealing process.

[0046] The controller is also connected to the motor 21, the upper limit switch 8, and the lower limit switch 10. It receives feedback signals from the upper limit switch 8 and the lower limit switch 10 and controls the opening and closing of the motor 21. When the door is opened, the motor 21 is turned on to lower the sealing door 2. When the sealing door 2 has fallen to the point of touching the lower limit switch 10, the motor 21 is stopped, and the sealing door 2 stops falling. When the sealing door 2 needs to be closed, the motor 21 is turned on to raise the sealing door 2. When the sealing door 2 has risen to the point of touching the upper limit switch 8, the motor 21 is stopped, and the sealing door 2 stops rising.

[0047] The controller is also connected to the light curtain sensor 4 and receives the feedback signal from the light curtain sensor 4. Before closing the sealing door 2 or during the rising process of the sealing door, the light curtain sensor 4 detects whether there are any foreign objects blocking the rising path of the sealing door 2. If there are, the controller promptly sends an abnormal signal and stops the motor. After the foreign objects are removed, the motor 21 is restarted to raise the sealing door 2.

[0048] The controller of this utility model is an existing commercial product. The controller receives feedback signals from the barometer 27, the upper limit switch 8, the lower limit switch 10, and the light curtain sensor 4 and performs corresponding actions, all of which are implemented by existing commercial programs.

[0049] It should be noted that the embodiments described in this utility model are merely illustrative examples of the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described embodiments or use similar methods to replace them, but without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A safety autoclave door seal device comprising a sealing door (2), characterized in that, It also includes a second support arm (15), a second limiting guide rail (6), a second fixing structure, a lifting screw (9), and a driving device (11). The sealing door (2) is provided with a vertical threaded hole that matches the external thread of the lifting screw (9). The sealing door (2) is set on the lifting screw (9) through threaded engagement. The bottom of the lifting screw (9) is connected to the lifting driving device (11). The left and right outer edges of the outer side of the sealing door (2) are provided with second limiting guide rails (6). The second limiting guide rails (6) are connected to the second support arm (15) through the second fixing structure. One end of the second support arm (15) is fixedly connected to the sterilizer chamber. The second fixing structure includes a second countersunk hole and a second through hole, a second screw, a second fixing nut, and a second fine-tuning nut. The second countersunk hole is opened on the second limiting guide rail (6), and the second through hole is opened on the second support arm (15). The second screw passes through the second through hole and the second fixing nut and extends into the second countersunk hole. Then the second fixing nut is tightened on the second limiting guide rail (6). The second fine-tuning nuts are provided on both sides of the second through hole of the second support arm (15). Tightening the second fine-tuning nuts fixes the second screw to the second support arm (15).

2. A door seal for a safety autoclave as defined in claim 1, wherein It also includes a first support arm (14) and a first guide rail (5). The left and right sides of the sealing door (2) are provided with first guide rails (5). The left and right sides of the sealing door (2) are provided with multiple rollers (16) evenly distributed vertically. The rollers (16) on the left and right sides of the sealing door (2) are respectively set in the first guide rails (5) on the corresponding sides. The first guide rail (5) is connected to the first support arm (14) through the first fixing structure. One end of the first support arm (14) is fixedly connected to the sterilizer chamber. The first fixing structure includes a first countersunk hole (28) and a first through hole, a first screw (19), a first fixing nut (17), and a first fine-tuning nut (18). The first countersunk hole (28) is opened on the first guide rail (5), and the first through hole is opened on the first support arm (14). The first screw (19) passes through the first through hole and the first fixing nut (17) of the first support arm (14) and extends into the first countersunk hole (28) of the first guide rail (5). The first fixing nut (17) is then tightened on the first guide rail (5). The first fine-tuning nuts (18) are provided on both sides of the first through hole of the first support arm (14). Tightening the first fine-tuning nuts (18) fixes the first screw (19) to the first support arm (14).

3. A door seal for a safety autoclave as defined in claim 2, wherein The outer edge of the opening (1) of the sterilizer chamber is provided with interconnected grooves, and all the grooves together form an annular placement groove (24). An annular sealing air pipe (25) is fixedly installed in the placement groove (24). An air nozzle (26) is provided on the sealing air pipe (25). The sealing air pipe (25) is also connected to a pressure tester (27).

4. The door seal for a gravity displacement autoclave of claim 3, wherein, There are multiple first support arms (14) and multiple second support arms (15). The multiple first support arms (14) and multiple second support arms (15) are evenly arranged in the vertical direction. The multiple first support arms (14) are all connected to the first guide rail (5) through the first fixing structure. The multiple second support arms (15) are all connected to the second limiting guide rail (6) through the second fixing structure.

5. A door seal for a safety autoclave as defined in claim 4, wherein The lifting drive device (11) includes an outer base (20) and a motor (21) and a deceleration and steering device disposed inside the outer base (20). The deceleration and steering device includes a reducer (22) and a steering gear (23). The input shaft of the reducer (22) is connected to the output shaft of the motor (21), and the output shaft of the reducer (22) is connected to the steering gear (23). The bottom of the lifting screw (9) is connected to the output shaft of the steering gear (23).

6. A door seal for a safety autoclave as defined in claim 5, wherein, It also includes a light curtain sensor (4). Light curtain sensors (4) are installed on both the left and right sides of the sealed door (2). The light curtain sensors (4) are fixedly connected to the sterilizer chamber.

7. A door seal for a safety autoclave according to claim 6, wherein An extension baffle (7) is provided at the top of the cabin opening (1), an upper limit switch (8) is provided at the bottom of the extension baffle (7), and a lower limit switch (10) is provided at the top of the outer base (20).

8. A door seal for a safety autoclave according to claim 7, wherein It also includes a horizontal safety railing (12) and multiple observation windows (13), with the multiple observation windows (13) set on the sealed door (2), and the safety railing (12) set at a set height above the outer base (20) and located outside the sealed door (2), with the safety railing (12) fixedly connected to the sterilizer chamber.

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