Railway switching device for automatic feeding and discharging of freeze dryer

Abstract

This utility model discloses an automatic feeding and discharging track switching device for a freeze dryer. It includes an outer frame, an inner frame, and a cylinder. The cylinder is connected to the end of the outer frame and to the end of the inner frame via a floating joint. The inner frame slides back and forth within the outer frame under the drive of the cylinder. A switching track is fixed on the inner frame. Two eccentric adjustment devices are provided at both ends of the inner frame, located on the left and right sides respectively. Each eccentric adjustment device includes a fixed base and an eccentric shaft. The fixed base is connected to the outer wall of the inner frame. A bearing is rotatably connected to one end of the eccentric shaft, and the bearing rolls against the inner wall of the outer frame in the back-and-forth direction. The fixed base has a through hole matching the other end of the eccentric shaft, and a locking nut is provided at the other end of the eccentric shaft. The other end of the eccentric shaft passes through the through hole and is threadedly connected to the locking nut. The beneficial effect of this utility model is that it avoids deviation in the connection gap between the two ends of the switching track after switching.

Description

Technical Field

[0001] This utility model relates to the technical field of track switching devices, and in particular to a track switching device for automatic feeding and discharging of a freeze dryer. Background Technology

[0002] A freeze dryer is a device that dries substances by first freezing them and then sublimating the water under vacuum. Freeze drying, also known as lyophilization technology, is an advanced material dehydration technology mainly used in fields such as bioengineering, pharmaceutical industry, and food industry.

[0003] The automatic feeding and discharging structure of a freeze dryer is a highly efficient mechanical system used to automate the loading and unloading of materials, thereby optimizing the freeze-drying process and reducing manual operation. One existing automatic feeding and discharging structure uses an electric track to convey racks containing items to be dried into the dryer's tank; after drying, the items are then conveyed out via the same electric track.

[0004] In track layouts, straight and curved tracks are typically included to facilitate the transport of shelves in different directions according to actual operational needs. Therefore, track switching devices are usually installed to change the transport direction. During installation, due to potential installation errors, it's easy for the switching track on the track switching device to misalign or interfere with the connection between the two ends of the switching track and the straight or curved track. Especially when the gap is too large, it can prevent the shelves from passing smoothly. Utility Model Content

[0005] This invention aims to overcome the shortcomings of existing track switching devices where the gap between the switching channels is prone to deviation, and provides an automatic feed and discharge track switching device for freeze dryers that avoids deviation in the connection gap between the two ends of the switching channel after switching.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: An automatic feeding and discharging track conversion device for a freeze dryer includes an outer frame, an inner frame, and a cylinder. The cylinder is detachably connected to the end of the outer frame. A floating joint is provided on the telescopic end of the cylinder. The cylinder is detachably connected to the end of the inner frame through the floating joint. The inner frame is slidably connected to the outer frame under the drive of the cylinder. A conversion track is fixed on the inner frame and located on the side of the outer frame. Two eccentric adjustment devices are provided at both the front and rear ends of the inner frame, respectively located on the left and right sides of the inner frame. Each eccentric adjustment device includes a fixed seat and an eccentric shaft. The fixed seat is detachably connected to the outer side wall of the inner frame. A bearing is rotatably connected to one end of the eccentric shaft. The bearing is rolled to the inner side wall of the outer frame in the front-rear direction. The fixed seat has a through hole that matches the other end of the eccentric shaft. A locking nut is provided at the other end of the eccentric shaft. The other end of the eccentric shaft passes through the through hole and is threadedly connected to the locking nut.

[0007] The cylinder is detachably connected to the end of the outer frame. A floating joint is provided on the telescopic end of the cylinder. The cylinder is detachably connected to the end of the inner frame through the floating joint. The inner frame is slidably connected to the outer frame under the drive of the cylinder. A conversion channel is fixed on the inner frame. The conversion channel is located on the side of the outer frame. Two eccentric adjustment devices are provided at both the front and rear ends of the inner frame. The two eccentric adjustment devices are located on the left and right sides of the inner frame, respectively. The eccentric adjustment device includes a fixed seat and an eccentric shaft. The fixed seat is detachably connected to the outer side wall of the inner frame. One end of the eccentric shaft is rotatably connected to a bearing. The bearing is rolledly connected to the inner side wall of the outer frame in the front-back direction. The fixed seat is provided with a through hole that matches the other end of the eccentric shaft. The other end of the eccentric shaft is provided with a locking nut. The other end of the eccentric shaft passes through the through hole and is threadedly connected to the locking nut. During track switching, the cylinder drives the inner frame to slide within the outer frame to achieve the switching of the track. While the inner frame slides, the bearing also rolls synchronously on the inner wall of the outer frame. The operator can adjust the gap between the inner and outer frames by unscrewing the locking nut and then rotating the eccentric shaft. After adjustment, the locking nut can be tightened. Through the above operation, the gap between the two ends of the switching track and the corresponding track can be adjusted respectively, so as to avoid the deviation of the connection gap at both ends of the switching track after switching, and even avoid interference, ensuring that the shelf can pass smoothly during the conveying process along the track.

[0008] Preferably, the inner frame has two or more fixed shafts on both its left and right outer sides. One end of each fixed shaft is fixedly connected to the outer wall of the inner frame, and the other end is rotatably connected to a pulley. The outer frame has grooves on both its left and right sides that match the pulleys. The thickness of the pulley is less than the depth of the groove. Driven by a cylinder, the inner frame slides back and forth within the outer frame via the pulleys and corresponding grooves. The inner frame is connected to the pulleys via fixed shafts, allowing the pulleys to rotate within their respective grooves. The fact that the pulley's thickness is less than the groove's depth facilitates the eccentric adjustment device in adjusting the gaps between the two ends of the transition track and the corresponding rails, and also improves the smoothness of the inner frame's sliding.

[0009] Preferably, the fixing base includes a base plate, which is detachably connected to the outer side wall of the inner frame. Two mounting ears are fixed on the side wall of the base plate. There are two eccentric shafts and two through holes, each located on one of the two mounting ears. The sliding groove is located between the two mounting ears. Synchronous adjustment of the two eccentric shafts on the same fixing base improves the stability of the inner frame when sliding along the outer frame.

[0010] Preferably, the system also includes a curved track, a straight main track, and a straight track on the same straight line as the straight main track. The curved track is located to the side of the straight track. The switching track includes a straight switching track and a curved switching track. The straight switching track and the curved switching track are fixed to the inner frame in the front-to-back direction. A notch 1 matching the straight switching track is formed between the straight track and the straight main track, and a notch 2 matching the curved switching track is formed between the curved track and the straight main track. Driven by a cylinder, the inner frame slides within the outer frame, causing the straight switching track to be located within notch 1 or the curved switching track to be located within notch 2, thereby achieving track switching.

[0011] Preferably, the straight main track has sliding grooves on both sides, giving it an I-shaped cross-section. A double-rod cylinder is detachably connected to the outer wall of the straight main track. The double-rod cylinder has two piston rods, each corresponding to one of the two sliding grooves. Each sliding groove has through holes on its upper and lower sides that match the corresponding piston rods. During the switching process, if the control system does not receive a signal from the cylinder to switch the switching path to the correct position, the control system controls the double-rod cylinder to actuate, causing the piston rods to insert into the sliding grooves through the through holes, preventing the rear shelf from passing through and thus avoiding accidents caused by the shelf falling from the air, improving operational safety. Conversely, if the control system receives a signal from the cylinder to switch the switching path to the correct position, the control system controls the double-rod cylinder to reset the piston rods.

[0012] Preferably, one side of the straight conversion track is close to the curved conversion track, and the corresponding side of the straight conversion track is away from the curved conversion track. Both ends of the side of the straight conversion track away from the curved conversion track are fixed with limiting blocks one that can respectively contact the straight main track and the straight track. Similarly, one side of the curved conversion track is close to the straight conversion track, and the corresponding side of the curved conversion track is away from the straight conversion track. Both ends of the side of the curved conversion track away from the straight conversion track are fixed with limiting blocks two that can respectively contact the straight main track and the curved track. Limiting blocks one and two facilitate improved accuracy in the docking of the conversion tracks.

[0013] The beneficial effects of this utility model are: 1. The gaps between the two ends of the switching channel and the corresponding tracks can be adjusted to avoid deviations in the connection gaps between the two ends of the switching channel after switching, and even to avoid interference, ensuring that the shelving can pass smoothly during the conveying process along the track; 2. The inner frame is connected to pulleys via fixed shafts, allowing the pulleys to rotate within corresponding grooves. The thickness of the pulleys is less than the depth of the grooves. This facilitates the eccentric adjustment device in adjusting the gaps between the two ends of the conversion track and the corresponding rails, and also improves the smoothness of the inner frame's sliding. 3. It can prevent the shelves from falling from the air, thus improving operational safety. Attached Figure Description

[0014] Figure 1 and Figure 2 These are all schematic diagrams of the structure of this utility model; Figure 3 yes Figure 2 Exploded view; Figure 4 This is a schematic diagram of the eccentric adjustment device; Figure 5 yes Figure 4 A partial exploded view.

[0015] In the diagram: 1. Outer frame, 2. Inner frame, 3. Cylinder, 4. Floating joint, 5. Conversion track, 6. Eccentric adjustment device, 7. Fixed seat, 8. Eccentric shaft, 9. Bearing, 10. Through hole, 11. Locking nut, 12. Fixed shaft, 13. Pulley, 14. Slide groove, 15. Base plate, 16. Mounting ear, 17. Curved track, 18. Straight main track, 19. Straight track, 20. Straight conversion track, 21. Curved conversion track, 22. Notch 1, 23. Notch 2, 24. Sliding groove, 25. Double-rod cylinder, 26. Through hole, 27. Limiting block 1, 28. Limiting block 2. Detailed Implementation

[0016] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this application or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0017] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0018] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of components illustrated in these embodiments do not limit the scope of this application. For ease of illustration, spatial relative terms such as “upper,” “lower,” “left,” and “right” are used in the embodiments to describe the relationship of one element or feature shown in the figures relative to another element or feature. It should be understood that, in addition to the orientations shown in the figures, spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the figures is inverted, an element described as being “below” other elements or features would be fixed “upper” to other elements or features. Thus, the exemplary term “lower” can include both upper and lower orientations. The device may be fixed in other ways (rotated 90 degrees or located in other orientations), and the spatial relative descriptions used herein can be interpreted accordingly. It should also be understood that, for ease of description, the dimensions of the various parts shown in the figures are not drawn to actual scale. Techniques, processes, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, processes, and equipment should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limiting. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be discussed further in subsequent figures.

[0019] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.

[0020] like Figure 1 , Figure 2 and Figure 3 In the described embodiment, an automatic feeding and discharging track conversion device for a freeze dryer includes an outer frame 1, an inner frame 2, and a cylinder 3. The cylinder 3 is detachably connected to the end of the outer frame 1. A floating joint 4 is provided on the telescopic end of the cylinder 3. The cylinder 3 is detachably connected to the end of the inner frame 2 through the floating joint 4. The inner frame 2 is slidably connected to the outer frame 1 under the drive of the cylinder 3. A conversion track 5 is fixed on the inner frame 2, located on the side of the outer frame 1. Two eccentric adjustment devices 6 are provided at both the front and rear ends of the inner frame 2, respectively located on the left and right sides of the inner frame 2. Figure 4 and Figure 5 As shown, the eccentric adjustment device 6 includes a fixed base 7 and an eccentric shaft 8. The fixed base 7 is detachably connected to the outer side wall of the inner frame 2. One end of the eccentric shaft 8 is rotatably connected to a bearing 9. The bearing 9 is rolled to the inner side wall of the outer frame 1 in the front-back direction. The fixed base 7 is provided with a through hole 10 that matches the other end of the eccentric shaft 8. The other end of the eccentric shaft 8 is provided with a locking nut 11. The other end of the eccentric shaft 8 passes through the through hole 10 and is threadedly connected to the locking nut 11.

[0021] like Figure 3 As shown, the inner frame 2 has two or more fixed shafts 12 on both the left and right sides. One end of the fixed shaft 12 is fixedly connected to the outer wall of the inner frame 2, and the other end of the fixed shaft 12 is rotatably connected to a pulley 13. The outer frame 1 has sliding grooves 14 on both the left and right sides that match the pulleys 13. Under the drive of the cylinder 3, the inner frame 2 is slidably connected to the outer frame 1 by the pulleys 13 matching the corresponding sliding grooves 14.

[0022] like Figure 4 and Figure 5 As shown, the fixed base 7 includes a base plate 15, which is detachably connected to the outer side wall of the inner frame 2. Two mounting ears 16 are fixed on the side wall of the base plate 15. There are two eccentric shafts 8 and two through holes 10. The two through holes 10 are located on the two mounting ears 16 respectively, and the sliding groove 14 is located between the two mounting ears 16.

[0023] like Figure 1 , Figure 2 and Figure 3As shown, it also includes a curved track 17, a straight main track 18, and a straight track 19 that is on the same straight line as the straight main track 18. The curved track 17 is located on the side of the straight track 19. The conversion track 5 includes a straight conversion track 20 and a curved conversion track 21. The straight conversion track 20 and the curved conversion track 21 are fixed to the inner frame 2 in the front-to-back direction. A gap 1 22 that matches the straight conversion track 20 is formed between the straight track 19 and the straight main track 18. A gap 23 that matches the curved conversion track 21 is formed between the curved track 17 and the straight main track 18.

[0024] The straight main track 18 has sliding grooves 24 on both sides, making its cross-sectional shape I-shaped. A double-rod cylinder 25 is detachably connected to the outer wall of the straight main track 18. The double-rod cylinder 25 has two piston rods that correspond one-to-one with the two sliding grooves 24. The upper and lower sides of the sliding groove 24 are provided with through holes 26 that match the corresponding piston rods.

[0025] One side of the straight conversion track 20 is close to the curved conversion track 21, and the other side of the straight conversion track 20 is away from the curved conversion track 21. Both ends of the side of the straight conversion track 20 away from the curved conversion track 21 are fixed with limiting blocks 1 27 that can contact the straight main track 18 and the straight track 19 respectively. One side of the curved conversion track 21 is close to the straight conversion track 20, and the other side of the curved conversion track 21 is away from the straight conversion track 20. Both ends of the side of the curved conversion track 21 away from the straight conversion track 20 are fixed with limiting blocks 28 that can contact the straight main track 18 and the curved track 17 respectively.

[0026] In Example 1, during track switching, cylinder 3 drives inner frame 2 to slide within outer frame 1 to switch the switching track 5. While inner frame 2 slides, bearing 9 also rolls synchronously on the inner wall of outer frame 1. The operator can adjust the gap between inner frame 2 and outer frame 1 by unscrewing locking nut 11 and then rotating eccentric shaft 8. After adjustment, tighten locking nut 11. Through the above operation, the gaps between the two ends of switching track 5 and the corresponding tracks can be adjusted, thus avoiding deviations in the connection gaps at both ends of switching track 5 after switching, and even preventing interference, ensuring that the shelf can pass smoothly during the conveying process along the track.

[0027] In the second embodiment, during the switching process, when the control system does not receive a signal from cylinder 3 to switch the switching channel 5 to the correct position, the control system controls the double-rod cylinder 25 to move, so that the piston rod is inserted into the sliding groove 24 through the through hole, preventing the rear shelf from passing through, thereby avoiding the accident of the shelf falling from the air and improving operational safety; conversely, when the control system receives a signal from cylinder 3 to switch the switching channel 5 to the correct position, the control system controls the double-rod cylinder 25 to drive the piston rod to reset.

[0028] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An automatic feeding and discharging track conversion device for a freeze dryer, comprising an outer frame (1), an inner frame (2), and a cylinder (3), wherein the cylinder (3) is detachably connected to the end of the outer frame (1), a floating joint (4) is provided on the telescopic end of the cylinder (3), the cylinder (3) is detachably connected to the end of the inner frame (2) through the floating joint (4), the inner frame (2) is slidably connected to the outer frame (1) back and forth under the drive of the cylinder (3), and a conversion channel (5) is fixed on the inner frame (2), the conversion channel (5) being located on the side of the outer frame (1), characterized in that, The inner frame (2) is provided with two eccentric adjustment devices (6) at both the front and rear ends. The two eccentric adjustment devices (6) are located on the left and right sides of the inner frame (2) respectively. The eccentric adjustment device (6) includes a fixed seat (7) and an eccentric shaft (8). The fixed seat (7) is detachably connected to the outer side wall of the inner frame (2). One end of the eccentric shaft (8) is rotatably connected to a bearing (9). The bearing (9) is rolled to the inner side wall of the outer frame (1) in the front-rear direction. The fixed seat (7) is provided with a through hole (10) that matches the other end of the eccentric shaft (8). The other end of the eccentric shaft (8) is provided with a locking nut (11). The other end of the eccentric shaft (8) passes through the through hole (10) and is threadedly connected to the locking nut (11).

2. The automatic feeding and discharging track conversion device for a freeze dryer according to claim 1, characterized in that, The inner frame (2) has two or more fixed shafts (12) on its left and right outer sides. One end of the fixed shaft (12) is fixedly connected to the outer wall of the inner frame (2), and the other end of the fixed shaft (12) is rotatably connected to a pulley (13). The outer frame (1) has sliding grooves (14) on its left and right sides that match the pulleys (13). The inner frame (2) is slidably connected to the outer frame (1) by the pulleys (13) and the corresponding sliding grooves (14) under the drive of the cylinder (3).

3. The automatic feeding and discharging track switching device for a freeze dryer according to claim 2, characterized in that, The fixed base (7) includes a base plate (15), which is detachably connected to the outer side wall of the inner frame (2). Two mounting ears (16) are fixed on the side wall of the base plate (15). The number of eccentric shafts (8) and the number of through holes (10) are both two. The two through holes (10) are located on the two mounting ears (16) respectively. The sliding groove (14) is located between the two mounting ears (16).

4. The automatic feeding and discharging track switching device for a freeze dryer according to claim 1, characterized in that, It also includes a curved track (17), a straight main track (18), and a straight track (19) on the same straight line as the straight main track (18). The curved track (17) is located on the side of the straight track (19). The conversion track (5) includes a straight conversion track (20) and a curved conversion track (21). The straight conversion track (20) and the curved conversion track (21) are fixed on the inner frame (2) in the front-back direction. A gap one (22) matching the straight conversion track (20) is formed between the straight track (19) and the straight main track (18). A gap two (23) matching the curved conversion track (21) is formed between the curved track (17) and the straight main track (18).

5. The automatic feeding and discharging track conversion device for a freeze dryer according to claim 4, characterized in that, The straight main track (18) has sliding grooves (24) on both sides, making its cross-sectional shape I-shaped. A double-rod cylinder (25) is detachably connected to the outer wall of the straight main track (18). The double-rod cylinder (25) has two piston rods that correspond one-to-one with the two sliding grooves (24). The upper and lower sides of the sliding groove (24) are provided with through holes (26) that match the corresponding piston rods.

6. The automatic feeding and discharging track conversion device for a freeze dryer according to claim 4, characterized in that, One side of the straight conversion track (20) is close to the curved conversion track (21), and the other side of the straight conversion track (20) is far away from the curved conversion track (21). Both ends of the side of the straight conversion track (20) away from the curved conversion track (21) are fixed with limiting blocks one (27) that can contact the straight main track (18) and the straight track (19) respectively. One side of the curved conversion track (21) is close to the straight conversion track (20), and the other side of the curved conversion track (21) is far away from the straight conversion track (20). Both ends of the side of the curved conversion track (21) away from the straight conversion track (20) are fixed with limiting blocks two (28) that can contact the straight main track (18) and the curved track (17) respectively.

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