Feeding device and freeze-drying production line

Abstract

The utility model provides a feeding device and a freeze-drying production line, and the feeding device comprises a conveying part used for continuously conveying bottle bodies to a freeze dryer, a monitoring part used for monitoring whether bottle bodies exist at an inlet of the conveying part, and a feeding part used for feeding the bottle bodies to the inlet of the conveying part, the controller is in communication connection with the monitoring part and the conveying part. And the controller is configured to enable the conveying part to continuously convey the bottle bodies to the freeze dryer and enable the conveying part to stop conveying the bottle bodies to the freeze dryer under the condition that the monitoring part monitors that no bottle bodies exist. The state switching part has a first state in which the monitoring part is allowed to execute the non-bottle monitoring, and a second state in which the monitoring part is forbidden to execute the non-bottle monitoring. According to the feeding device, the arrangement continuity of the bottle bodies on the conveying part is improved, the space in the freeze dryer is utilized more sufficiently, and the production efficiency of the freeze dryer is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to freeze-drying production technical field, especially the feeding device, the utility model relates to a freeze-drying production line with the feeding device. BACKGROUND

[0002] The medicine freeze-dried powder is the sterile powder injection that the water is sublimed and dried under the condition of the liquid medicine being frozen into solid state in the sterile environment, can keep the original medicine effect, in order to obtain the medicine freeze-dried powder, the liquid medicine is sent into the freeze dryer in the bottle after being filled into the bottle by filling machine, and then the bottle body is sent into the freeze dryer by the feeding device and freeze-dried.

[0003] Because the maximum bottle quantity that the freeze dryer can accommodate in single freeze-drying operation is fixed, when receiving the bottle, keeping the bottle continuous and gapless into the freeze dryer to arrange, can realize the maximum utilization of the freeze dryer space, but, in actual production, because of the equipment performance limitation, it is difficult to debug the filling speed of the filling machine and the transportation speed of the bottle into the freeze dryer to be completely matched, in order to avoid the problems such as bottle retention and bottle extrusion, usually the filling speed of the filling machine is set to be low, in addition, the equipment failure, bottle falling in the transportation process and other sudden problems may also occur, which will also cause the bottle arrangement on the track to have intervals, cannot realize the continuous feeding of the freeze dryer, and further cause the production efficiency of the freeze dryer to be reduced. SUMMARY

[0004] Therefore, the utility model aims at providing a feeding device to improve the production efficiency of the freeze dryer.

[0005] In order to achieve the above-mentioned purpose, the technical scheme of the utility model is as follows:

[0006] A feeding device, comprising a conveying part for continuously conveying bottles to a freeze dryer, a monitoring part for monitoring whether there is a bottle at the entrance of the conveying part, a feeding part for feeding bottles to the entrance of the conveying part, a controller communicatively connected with the monitoring part and the conveying part, and a state switching part;

[0007] The controller is configured to make the conveying part continuously convey bottles to the freeze dryer, and stop the conveying part from conveying bottles to the freeze dryer when the monitoring part detects that there is no bottle;

[0008] The state switching part has a first state allowing the monitoring part to perform no-bottle monitoring, and a second state disabling the monitoring part to perform no-bottle monitoring.

[0009] Further, the monitoring part includes a photoelectric sensor, the conveying part is provided with a monitoring path corresponding to the arrangement of the photoelectric sensor, and the monitoring path intersects with the moving path of the bottle;

[0010] The state switching part comprises a blocking part, which can be operated to prevent the photoelectric sensor from emitting light or to block the light emitted by the photoelectric sensor.

[0011] Further, the blocking part comprises a shielding part for shielding the photoelectric sensor, and the shielding part comprises a baffle or a cover with one end open.

[0012] Further, the blocking part further comprises a driving part, which has an output end capable of moving in a straight line or rotating around a rotation axis, and the output end is used to drive the shielding part to shield or disengage from the photoelectric sensor.

[0013] Further, the driving part comprises a pneumatic cylinder, and a cylinder body end of the pneumatic cylinder is arranged on the conveying part, and a piston rod end is connected to the shielding part.

[0014] Further, the driving part comprises a pneumatic cylinder, a connecting rod and a control valve, one end of the connecting rod is hinged on the conveying part, the pneumatic cylinder is hinged between the connecting rod and the conveying part, the output end is arranged on the connecting rod and connected to the shielding part, and the control valve is used to control the extension and contraction of the pneumatic cylinder to drive the connecting rod to shield or disengage the shielding part from the photoelectric sensor.

[0015] Further, a flexible connecting part is arranged between the shielding part and the conveying part.

[0016] Further, the blocking part comprises a control switch, which is connected in series in a power supply circuit of the photoelectric sensor.

[0017] Further, at least two monitoring parts are arranged along a moving path of the bottle body, and the controller is configured to stop the conveying part from conveying the bottle body to the freeze dryer when any of the monitoring parts detects that there is no bottle body;

[0018] Further, the state switching part comprises a reset device, which is configured to switch the state switching part to the first state when a duration of the state switching part in the second state reaches a predetermined time threshold.

[0019] Further, the conveying part comprises a chain plate conveyor.

[0020] Further, a bottle blocking device is arranged on the chain plate conveyor, and the bottle blocking device is installed at an inlet of the freeze dryer and can be controlled by the controller to prevent the bottle body on the conveying part from being conveyed to the freeze dryer.

[0021] Further, a guide plate is arranged on the chain plate conveyor, and the guide plate is used to guide the transportation of the bottle body on the chain plate conveyor.

[0022] Compared with the prior art, the utility model has the following advantages:

[0023] The feeding device can stop conveying the bottle to the freeze dryer when the bottle on the conveying part moves to the monitoring area of the monitoring part, the bottle on the conveying part stops moving, and the bottle supplied by the feeding part enters the monitoring area of the monitoring part and forms a continuous and gapless arrangement with the original bottle on the conveying part, so that the conveying part can convey the bottle to the freeze dryer again, the continuity of the arrangement of the bottle on the conveying part is improved, the space in the freeze dryer is more fully utilized, and the production efficiency of the freeze dryer is improved.

[0024] Secondly, the photoelectric sensor is adopted for monitoring, the photoelectric sensor has the characteristics of high monitoring precision and fast response speed, the monitoring path intersects with the moving path of the bottle, the existence of the bottle can be accurately monitored by the photoelectric sensor when the bottle passes through the monitoring area, meanwhile, the operation blocking part can block the light of the photoelectric sensor or prevent the photoelectric sensor from emitting light, so that the state switching part remains in the second state, and all the bottles can smoothly enter the freeze dryer.

[0025] In addition, the shielding part is selected from a baffle and a cover, and the light of the photoelectric sensor can be effectively shielded, the specific size and shape of the shielding part can be determined according to the shape, installation position and other factors of the photoelectric sensor, and the shielding part is convenient and practical to use; after the filling work is completed and all the tail bottles enter the conveying part, the shielding part shields the light emitted by the photoelectric sensor in a manual or automatic manner until all the bottles enter the freeze dryer. The driving part can drive the shielding part to shield or separate from the photoelectric sensor, and compared with manual operation of the shielding part, the shielding part is more convenient and the position control is more accurate.

[0026] Through the combination of the air cylinder, the connecting rod and the control valve, the operator can control the extension and retraction of the air cylinder by using the control valve, the extension and retraction of the air cylinder drives the connecting rod to move, so that the shielding part connected to the connecting rod can shield or separate from the photoelectric sensor, and the control valve can be used to control the shielding part when the control valve is arranged in different areas, and the use is more convenient.

[0027] The flexible connecting part can be arranged on the conveying part, and the shielding part is not easy to lose, and the use of the cover is not affected.

[0028] Furthermore, the power supply and power-off of the photoelectric sensor can be conveniently controlled through the control switch, when the filling work is completed and the remaining bottles on the conveying part need to be sent into the freeze dryer, the switch is turned off, so that the state switching part is in the second state, and the conveying part continuously sends the bottles into the freeze dryer.

[0029] Because the bottle body can reappear the gap between the bottle bodies which have been arranged continuously and without gap during the movement of the bottle body on the conveying part due to the vibration and the like, the monitoring part downstream can monitor the gap and control the stop of conveying to the freeze dryer, the bottle body newly entering the conveying part can push the original bottle body on the conveying part forward after the feeding part supplies the bottle body to the conveying part, so that the gap is filled, and the reliability and stability of the feeding device are further improved.

[0030] In addition, the reset device can be set to time, so that the state switching part is switched back to the first state after the tail bottle body enters the freeze dryer, so as to ensure the normal use of subsequent production.

[0031] The chain plate type conveying machine has the advantages of large conveying capacity, stable conveying, simple structure and convenient maintenance, the structure of the chain plate can provide stable support for the bottle body, and the surface of the chain plate is relatively smooth, so that the bottle body supplied by the feeding part is more easily pushed to fill the gap between the bottle bodies.

[0032] The bottle blocking device is arranged on the chain plate type conveying machine, when the monitoring part monitors that there is no bottle body, the bottle body is stopped from entering the freeze dryer by controlling the bottle blocking device, at this time, the chain plate type conveying machine keeps conveying, and when the feeding part can continue to supply the bottle body, the bottle body on the conveying part can be arranged continuously as soon as possible, and the conveying of the bottle body to the freeze dryer is restarted.

[0033] The guide plate arranged on the chain plate type conveying machine can guide the movement of the bottle body, so that the bottle body keeps correct direction and arrangement order during the conveying process, the mutual collision and deviation from the conveying path of the bottle body are reduced, and the continuity of the conveying of the bottle body is improved.

[0034] Another purpose of the utility model lies in providing a freeze drying production line, which is provided with the feeding device.

[0035] The freeze drying production line has the same beneficial effects as the feeding device relative to the prior art, and will not be described here. DRAWINGS

[0036] The drawings constituting a part of the utility model are used to provide further understanding of the utility model, the illustrative embodiment of the utility model and the description thereof are used to explain the utility model, and do not constitute improper limitation on the utility model. In the drawings:

[0037] Figure 1 It is a whole structure schematic view of the feeding device described in the utility model embodiment;

[0038] Figure 2 It is a local structure schematic view of the feeding device described in the utility model embodiment;

[0039] Figure 3 Another embodiment of the blocking part is shown in the schematic view.

[0040] Reference signs:

[0041] 1. conveying part;

[0042] 101. chain plate conveyor; 102. guide plate; 103. receiving area;

[0043] 2. photoelectric sensor;

[0044] 201. transmitting end; 202. receiving end;

[0045] 3. feeding part;

[0046] 4. blocking part;

[0047] 401. cover; 402. air cylinder; 403. connecting rod; 404. hinged shaft; 405. flexible connecting part; 406. hinged support. DETAILED DESCRIPTION

[0048] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0049] In the description of the present application, it should be noted that if the terms indicating the orientation or position relationship such as "upper", "lower", "inner", "outer" appear, they are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as limiting the device or element to have a specific orientation, to be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, if the terms "first", "second", etc. appear, they are also used for description purposes only and cannot be understood as indicating or implying relative importance.

[0050] In addition, in the description of the present application, unless otherwise explicitly limited, the terms "mounting", "connection", "connecting", "connector" should be understood broadly. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood in combination with the specific circumstances.

[0051] The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0052] Embodiment one

[0053] The embodiment relates to a feeding device for improving the production efficiency of a freeze dryer.

[0054] In terms of overall structure, the feeding device in the embodiment comprises a conveying part 1 for continuously conveying bottle bodies to the freeze dryer, a monitoring part for monitoring whether there is a bottle body at the entrance (monitoring area) of the conveying part 1, a feeding part 3 for feeding the bottle bodies to the entrance of the conveying part 1, a controller in communication connection with the monitoring part and the conveying part 1, and a state switching part. Figure 1 and Figure 2 The controller is configured to enable the conveying part 1 to continuously convey the bottle bodies to the freeze dryer, and stop the conveying part 1 from conveying the bottle bodies to the freeze dryer when the monitoring part monitors that there is no bottle body. The state switching part has a first state allowing the monitoring part to perform the no-bottle-body monitoring, and a second state disabling the monitoring part from performing the no-bottle-body monitoring.

[0055] The monitoring part of the application allows the no-bottle-body monitoring to be performed, that is, when there is no bottle body in the monitoring area, the monitoring part can send a “no-bottle-body signal” to the controller; when there is a bottle body in the monitoring area, the monitoring part stops sending the “no-bottle-body signal” to the controller, specifically, does not send the signal or sends a “bottle-body signal”.

[0056] The monitoring part of the application is disabled to perform the no-bottle-body monitoring, that is, the monitoring part cannot send the “no-bottle-body signal” to the controller, including stopping the monitoring part from working and being unable to send any signal to the controller, or including sending the “bottle-body signal” to the controller regardless of whether there is a bottle body in the monitoring area.

[0057] When the state switching part is in the first state, the bottle body moves to be separated from the monitoring area on the conveying part 1, and the controller can control the conveying part 1 to stop conveying the bottle bodies to the freeze dryer according to the “no-bottle-body signal” provided by the monitoring part; when the feeding part 3 continues to feed, the bottle bodies supplied enter the monitoring area and form a continuous and gapless arrangement with the original bottle bodies on the conveying part 1, the monitoring part stops sending the “no-bottle-body signal” to the controller, and the controller can control the conveying part 1 to re-convey the bottle bodies to the freeze dryer; if the monitoring area is continuously without bottle bodies, the conveying part 1 will continuously stop conveying to the freeze dryer. Therefore, the embodiment can ensure that the bottle bodies are arranged continuously on the conveying part 1, and the production efficiency of the freeze dryer is improved, but there is a problem that the bottle bodies on the conveying part 1 are retained and cannot be completely fed into the freeze dryer.

[0058] The second state of the state switching part belongs to "abnormal use state", and the use condition is: the same batch of medicine production, the end of filling, all the tail bottle bodies are sent to the conveying part 1 and leave the monitoring area, but not all enter the freeze dryer. At this time, the controller no longer controls the conveying part 1 to stop conveying the bottle body to the freeze dryer due to the absence of bottle body in the monitoring area, so as to avoid the problem of medicine waste caused by the tail bottle body staying on the conveying part 1 due to the controller receiving the "no bottle body signal" and stopping transportation. When all the bottle bodies are sent to the freeze dryer, the state switching part is restored to the first state.

[0059] Therefore, the state switching part is arranged, which not only ensures the continuous arrangement of the bottle bodies on the conveying part 1 in the early stage, but also ensures that all the remaining tail bottle bodies enter the freeze dryer after the end of filling.

[0060] The application does not limit the type of monitoring part, which can monitor whether there is a bottle body in the monitoring area of the conveying part 1, for example, photoelectric sensor 2, mechanical sensor, capacitive sensor, pressure sensor, etc. Correspondingly, the state switching part can disable the monitoring part to perform no bottle body monitoring. In addition, the controller of the application can make the conveying part 1 continuously convey the bottle body to the freeze dryer. Only for the monitoring part, the controller receives other information outside the monitoring part, and the control of the conveying part 1 is not affected by the monitoring part. For example, when the freeze dryer needs to be controlled due to internal failure or other conditions, even if the monitoring part does not send the "no bottle body signal" to the controller, the bottle body can still be stopped from being sent to the freeze dryer.

[0061] Based on the above overall introduction, still referring to Figure 1 and Figure 2 , specifically, the bottle body used in the embodiment has a bottle body with at least part of the cross section being a cylindrical shape. Taking a commonly used vial for freeze-dried medicine filling as an example, the continuous and gapless arrangement of the bottle body means that the adjacent vials are in close contact with each other, and the gap between the two vials can be basically ignored. For the specific selection type of the controller, for example, an industrial computer can be selected as the controller.

[0062] Specifically, the monitoring part of the embodiment includes a photoelectric sensor 2, which is a reflection type photoelectric sensor 2 and specifically includes a transmitting end 201 and a receiving end 202. The conveying part 1 is provided with a monitoring path corresponding to the arrangement of the photoelectric sensor 2, and the monitoring path intersects with the moving path of the bottle body. The state switching part includes a blocking part 4, which can be operated to block the receiving end 202 from receiving the light emitted by the transmitting end 201 or to prevent the transmitting end 201 from emitting light. When the light emitted by the transmitting end 201 is not blocked on the monitoring path, the photoelectric sensor 2 sends a signal to the controller, which is a "no bottle body signal". When the blocking part 4 blocks the light of the transmitting end 201, the state switching part switches to the second state, the receiving end 202 continuously receives no light, the photoelectric sensor 2 cannot send a "no bottle body signal" to the controller, and the controller will keep the conveying part 1 conveying the bottle body into the freeze dryer. The monitoring path of the embodiment is perpendicular to the moving path of the bottle body.

[0063] Secondly, in specific implementation, a time threshold can be set on the controller. When the controller receives the "no bottle body signal" of the photoelectric sensor 2 for more than the time threshold, the conveying part 1 is controlled to stop conveying the bottle body to the freeze dryer, so as to prevent the small gap between the two bottle bodies from causing the conveying of the bottle body to the freeze dryer to be temporarily stopped. In addition, for bottle bodies with non-equal cross-section cylindrical bottle bodies, there will be a certain gap at a certain height when the bottle bodies are arranged continuously. Therefore, the time threshold can be determined comprehensively according to the reasonable gap that may exist between the two bottle bodies arranged continuously on the monitoring path and the transportation speed.

[0064] It should be noted that the photoelectric sensor 2 is used for monitoring, and the photoelectric sensor 2 has the characteristics of high monitoring accuracy and fast response speed. The monitoring path intersects with the moving path of the bottle body, which can ensure that the photoelectric sensor 2 can accurately monitor the presence or absence of the bottle body when the bottle body passes through the monitoring area. Specifically, the reflection type photoelectric sensor 2 selected by the embodiment has less restrictions on the monitored objects and can monitor most objects made of materials such as glass and plastic. The installation is also relatively convenient. Of course, it is also possible to use a mirror surface reflection type photoelectric sensor 2, an infrared photoelectric sensor 2, an ultrasonic signal sensor, etc.

[0065] Secondly, in order to obtain a better light blocking effect, the blocking part 4 includes a cover body 401 with one end open. The cover body 401 is made of opaque material and is used to shield the transmitting end 201 (or the receiving end 202). The cover body 401 made of opaque material can effectively block the light of the transmitting end 201, so that the photoelectric sensor 2 is in a state of monitoring the presence of the bottle body, and the structure of the cover body 401 is more convenient to use when shielding. The cover body 401 of the embodiment is a circular truncated cone cup with a large opening and a small inner bottom. Of course, other structures such as a baffle can be used to replace the cover body 401.

[0066] Further, the blocking part 4 further comprises a driving part, the driving part has an output end capable of moving in a straight line or rotating around a rotating shaft, and the output end is used to drive the shielding part to shield or separate from the photoelectric sensor 2. The driving part can drive the shielding part to shield and separate from the photoelectric sensor 2, which is convenient for operation.

[0067] For example, in order to improve the convenience of the cover 401, the blocking part 4 further comprises a pneumatic cylinder 402, a connecting rod 403 and a control valve (not shown in the figure). The connecting rod 403 is hinged on the conveying part 1. The pneumatic cylinder 402 is hinged between the connecting rod 403 and the conveying part 1. The cover 401 is connected to the connecting rod 403. The control valve is used to control the extension and contraction of the pneumatic cylinder 402, so as to drive the connecting rod 403 to shield or separate the cover 401 from the emitting end 201. Through the combination of the pneumatic cylinder 402, the connecting rod 403 and the control valve, the operator uses the control valve to control the extension and contraction of the pneumatic cylinder 402, and the extension and contraction of the pneumatic cylinder 402 drives the connecting rod 403 to move, so that the cover 401 connected to the connecting rod 403 can shield or separate from the emitting end 201. The control valve can be set in different areas to control the cover 401, and the use is more convenient. Specifically, the frame of the chain plate conveyor 101 is provided with a hinge support 406 and a hinge shaft 404. One end of the connecting rod 403 is hinged to the conveying part 1 through the hinge support 406, and one end of the pneumatic cylinder 402 is hinged to the conveying part 1 through the hinge shaft 404. The outer bottom of the cover 401 is provided with an ear, and the connecting rod 403 is connected to the ear through a hanging ring, so that the cover 401 always opens downward under the action of gravity, so as to shield outside the emitting end 201. Because the freeze-drying production needs to be carried out in a sterile environment, in the specific implementation, the control valve can be arranged outside the sterile room, so that the operator can control the pneumatic cylinder 402 without entering the sterile room, thereby reducing the pollution risk of the sterile room.

[0068] In another implementable form of the blocking part 4, the driving part comprises a pneumatic cylinder 402, the cylinder end of the pneumatic cylinder 402 is arranged on the conveying part 1, the piston rod end is the output end and is connected to the shielding part. Through the extension and contraction of the pneumatic cylinder 402, the shielding part can be directly driven to move in a straight line to shield or separate from the photoelectric sensor 2. Meanwhile, the control button of the pneumatic cylinder 402 can be installed in an area convenient for the operator to operate.

[0069] In another implementable form of the blocking part 4, the driving part comprises a motor, a speed reducer and a connecting arm. The motor is connected to the speed reducer. One end of the connecting arm is connected to the output shaft of the speed reducer, and the other end is the output end and is connected to the shielding part. Through the driving of the motor, the shielding part can shield or separate from the photoelectric sensor 2. Meanwhile, the corresponding control button can be installed in an area convenient for the operator to operate.

[0070] Preferably, the conveying part 1 comprises a chain plate conveyor 101, and a bottle blocking device (not shown in the figure) arranged on the chain plate conveyor 101 at a position close to the inlet of the freeze dryer; the bottle blocking device comprises a release state and a blocking state; when the photoelectric sensor 2 sends a bottle signal or no signal to the controller, the controller controls the bottle blocking device to be in the release state, that is, the bottle on the chain plate conveyor 101 is released to enter the freeze dryer; when the photoelectric sensor 2 sends a no bottle signal to the controller, the controller controls the bottle blocking device to be in the blocking state, at this time, although the chain plate conveyor 101 is still in the conveying state, the bottle blocking device will hinder the bottle from entering the freeze dryer until the controller stops sending the no bottle signal.

[0071] Specifically, the bottle blocking device can be a baffle device, which can be controlled by the controller to enter or move out of the moving path of the bottle, so as to switch between the release state and the blocking state. The bottle blocking device can also be a star wheel device, the size between two adjacent teeth of the star wheel structure matches the size of the bottle, and the controller can control the rotation state of the star wheel; when the star wheel rotates, the star wheel device is in the release state, and the star wheel teeth can guide the bottle conveying to a certain extent to ensure that the distance between the bottles entering the freeze dryer meets the requirements; when the star wheel is stationary, the star wheel device is in the blocking state, and the teeth will block the movement of the bottle.

[0072] The chain plate conveyor 101 has the advantages of large conveying capacity, stable conveying, simple structure, convenient maintenance, etc. The structure of the chain plate can provide stable support and conveying power for the bottle, and the surface of the chain plate is relatively smooth, so that when the bottle supplied by the feeding part 3 enters the conveying part 1, it is easier to push the front bottle to fill the gap between the bottles. Of course, the specific conveying equipment of the conveying part 1 can also use equipment such as a conveyor belt, a conveying roller, etc. that can continuously convey bottles. The feeding part 3 can use the same or different conveying equipment as the conveying part 1.

[0073] In order to improve the continuity of the arrangement of the bottles, the chain plate conveyor 101 is provided with a guide plate 102 for guiding the bottles. The guide plates 102 are symmetrically and parallelly arranged on both sides of the chain plate conveyor 101, and the two guide plates 102 are parallel to each other with a distance slightly larger than the diameter of the bottle, which is conducive to guiding the bottles. The guide plates 102 arranged on the chain plate conveyor 101 can guide the movement of the bottles, so that the bottles maintain the correct direction and arrangement order during the conveying process, reduce the collision and deviation from the conveying path, and help to improve the continuity of the bottle conveying.

[0074] The chain plate conveyor 101 and the feeding part 3 are provided with guide plates 102, and the chain plate conveyor 101 and the feeding part 3 can be an integrated continuous structure or a segmented structure. When the chain plate conveyor 101 and the feeding part 3 are in a segmented structure, the guide plates 102 of the two are butted along the conveying direction, and a receiving area 103 is arranged between the inlet of the chain plate conveyor 101 and the two guide plates 102. The receiving area 103 is made of a smooth material such as stainless steel and is used to build a transition platform between the chain plate conveyor 101 and the feeding part 3. The conveying belt can push the bottle bodies onto the receiving area 103 and into the chain plate conveyor 101.

[0075] Preferably, at least two monitoring parts are arranged along the moving path of the bottle bodies, and the controller is configured to stop the bottle bodies from being conveyed into the freeze dryer when any of the monitoring parts detects that there is no bottle body. During the movement of the bottle bodies on the conveying part 1, gaps may reappear between the bottle bodies that have been arranged continuously and without gaps due to reasons such as vibration. When the monitoring part downstream detects the gap, the bottle blocking device blocks the transportation of the bottle bodies into the freeze dryer. After the feeding part 3 feeds the bottle bodies into the conveying part 1, the newly entered bottle bodies can push the original bottle bodies on the conveying part 1 forward, so that the gaps are filled, and the reliability and stability of the feeding device are further improved. In the embodiment, one monitoring part is arranged at the inlet (upstream position) of the chain plate conveyor 101 and one monitoring part is arranged near the outlet (downstream position) of the chain plate conveyor 101. The monitoring part near the outlet is arranged on the side of the bottle blocking device away from the inlet of the freeze dryer.

[0076] The feeding device of the embodiment can block the bottle bodies from entering the freeze dryer when the bottle bodies on the conveying part 1 move out of the monitoring area of the monitoring part. After the feeding part 3 continues to feed the bottle bodies into the conveying part 1, the bottle bodies enter the monitoring path on the conveying part 1 and form a continuous and gap-free arrangement with the original bottle bodies on the conveying part 1. Then, the bottle blocking device can be switched to a release state, the continuity of the arrangement of the bottle bodies on the conveying part 1 is improved, the space in the freeze dryer is used more fully, and the production efficiency of the freeze dryer is improved. At the same time, the operation blocking part 4 can block the light of the emission end 201 of the photoelectric sensor 2 to manufacture a bottle state, and the conveying part 1 can continue to feed the bottle bodies into the freeze dryer. When the last batch of bottle bodies entering the freeze dryer are all on the conveying part 1 and the feeding part 3 does not feed the bottle bodies any more, the normal conveying of the conveying part 1 is ensured, and all the bottle bodies can smoothly enter the freeze dryer.

[0077] Embodiment Two

[0078] The embodiment relates to a feeding device, referring to Figure 3 The difference between the embodiment and the embodiment one is that the blocking part 4 comprises a cover body 401 and a flexible connecting part 405, and the flexible connecting part 405 is connected between the cover body 401 and the conveying part 1.

[0079] Specifically, the flexible connection part 405 can be a steel wire, a chain or a hemp rope, etc. In this embodiment, the flexible connection part 405 is a steel wire, the cover body 401 is provided with a handle, one end of the steel wire is fixed to the rack of the chain plate conveyor 101, and the other end is tied to the handle of the cover body 401. In specific operation, the cover body 401 can be manually held to shield the emitting end 201 of the photoelectric sensor 2 or the cover body 401 is moved away from the emitting end 201, so that the cover body 401 is not easy to be lost when not in use, and the use of the cover body 401 is not affected.

[0080] In this embodiment, the cover body 401 needs to be manually operated, but the structure is simple and easy to install, and compared with a complex mechanical structure, it is not easy to malfunction and has low maintenance cost.

[0081] Embodiment Three

[0082] This embodiment relates to a feeding device, which is different from the first embodiment in that the blocking part 4 comprises a control switch, and the control switch is connected in series in the power supply circuit of the photoelectric sensor 2. The control switch can conveniently control the power-on and power-off of the photoelectric sensor 2. When the photoelectric sensor 2 sends a bottle body signal to the controller or does not send a signal, the conveying part 1 continuously conveys the bottle body to the freeze dryer. When the photoelectric sensor 2 sends a no bottle body signal to the controller, the conveying part 1 stops conveying the bottle body to the freeze dryer.

[0083] This embodiment can select the series connection position of the control switch according to the working mode of the photoelectric sensor 2, and set the matching controller control logic.

[0084] For example, for the case that the power supply circuits of the emitting end 201 and the receiving end 202 are independent of each other, if the control switch is connected in series in the power supply circuit of the receiving end 202, it can be controlled whether the receiving end 202 can send a signal to the controller. At this time, the control logic of the controller can be set as: receiving a bottle body signal or no signal, controlling the bottle body to be conveyed into the freeze dryer; receiving a no bottle body signal, controlling the bottle body to stop being conveyed into the freeze dryer; this control logic is also applicable to the case that the power supply circuits of the emitting end 201 and the receiving end 202 are not independent.

[0085] In the case that the power supply circuits of the transmitting end 201 and the receiving end 202 are independent of each other, if the control switch is connected in series in the power supply circuit of the transmitting end 201, the transmitting end 201 can be controlled to emit light or not. When the transmitting end 201 cannot emit light or the emitted light is blocked by the bottle body, the receiving end 202 cannot receive light and sends a bottle body signal to the controller. When the transmitting end 201 emits light and there is no bottle body blocking, the receiving end 202 receives light and sends a no bottle body signal to the controller. At this time, the control logic of the controller can be set as follows: when the bottle body signal is received, the bottle body is controlled to be transported into the freeze dryer; when the no bottle body signal is received, the bottle body is controlled to stop being transported into the freeze dryer; and when no signal is received, a fault alarm can be sent. This control logic can monitor whether the receiving end 202 of the photoelectric sensor 2 is working normally, which is more conducive to the smooth production.

[0086] After the same batch of liquid medicine to be processed by the freeze dryer is filled, the last bottle body is transported to the conveying part 1 and passes through the monitoring area of the photoelectric sensor 2, and there are still remaining bottle bodies on the conveying part 1, but the controller starts to receive the no bottle body signal and controls the conveying part 1 to stop transporting the bottle body into the freeze dryer. At this time, the control switch is disconnected, the monitoring part cannot send the no bottle body signal to the controller (i.e., the state switching part is in the second state), so that the conveying part 1 can continue to send the last bottle body into the freeze dryer. After the transportation is completed, the control switch is closed again to make the photoelectric sensor 2 return to the powered state (i.e., the state switching part is in the first state). The operator can operate the control switch to control whether the conveying part 1 transports the bottle body into the freeze dryer according to the actual situation, which is relatively convenient to operate.

[0087] In another implementable manner, an automatic reset device is arranged on the control switch. The automatic reset device includes a timer. When the control switch is in the powered-off state, the automatic reset device automatically restores the control switch to the closed state according to the set time of the timer. The set time is determined according to the time required for the last bottle body in the same batch to pass through the upstream monitoring path on the conveying part 1 and enter the freeze dryer, so as to ensure that all the tail bottle bodies are smoothly sent into the freeze dryer. The reset device can adopt devices that can be realized by the prior art, such as timers, relays, intelligent sockets, etc.

[0088] Embodiment Four

[0089] This embodiment relates to a freeze-drying production line provided with the feeding device of any one of the embodiments one to three.

[0090] By arranging the feeding device, the bottle body on the freeze-drying production line can be better continuously sent into the freeze dryer, the bottle body can be more smoothly sent into the freeze dryer, and all the tail bottle bodies can be ensured to be sent into the freeze dryer, which is conducive to improving the production efficiency of the freeze dryer.

[0091] The above merely describes preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A feeding device characterized in that: it comprises a conveying part (1) for continuously conveying bottle bodies to a freeze dryer, a monitoring part for monitoring whether there are bottle bodies at the entrance of the conveying part (1), a feeding part (3) for feeding the bottle bodies to the entrance of the conveying part (1), a controller communicatively connected with the monitoring part and the conveying part (1), and a state switching part; the controller is configured to make the conveying part (1) continuously convey the bottle bodies to the freeze dryer, and to make the conveying part (1) stop conveying the bottle bodies to the freeze dryer when the monitoring part detects that there are no bottle bodies; the state switching part has a first state allowing the monitoring part to perform no-bottle-body monitoring, and a second state disabling the monitoring part to perform no-bottle-body monitoring.

2. The feeding device according to claim 1, characterized in that: the monitoring part comprises a photoelectric sensor (2), and the conveying part (1) is provided with a monitoring path corresponding to the arrangement of the photoelectric sensor (2), the monitoring path intersecting with the moving path of the bottle bodies; the state switching part comprises a blocking part (4), the blocking part (4) can be operated to prevent the photoelectric sensor (2) from emitting light or to block the light emitted by the photoelectric sensor (2).

3. The feeding device according to claim 2, characterized in that: the blocking part (4) comprises a shielding part for shielding the photoelectric sensor (2), and the shielding part comprises a baffle or a cover (401) with one end open.

4. The feeding device according to claim 3, characterized in that: the blocking part (4) further comprises a driving part, the driving part has an output end capable of moving linearly or rotating around a rotation axis, and the output end is used to drive the shielding part to shield or unshield the photoelectric sensor (2).

5. The feeding device according to claim 4, characterized in that: the driving part comprises a pneumatic cylinder; the cylinder body end of the pneumatic cylinder is arranged on the conveying part, and the piston rod end is connected with the shielding part; or the driving part comprises a pneumatic cylinder (402), a connecting rod (403) and a control valve; one end of the connecting rod (403) is hinged to the conveying part (1); the pneumatic cylinder (402) is hinged between the connecting rod (403) and the conveying part (1); the output end is arranged on the connecting rod (403) and connected with the shielding part; and the control valve is used to control the extension and contraction of the pneumatic cylinder (402) to drive the connecting rod (403) to shield or unshield the photoelectric sensor (2).

6. The feeding device according to claim 3, characterized in that: a flexible connecting part (405) is arranged between the shielding part and the conveying part (1).

7. The feeding device according to claim 2, characterized in that: the blocking part comprises a control switch, and the control switch is connected in series in the power supply circuit of the photoelectric sensor.

8. The feeding device according to claim 1, characterized in that: ​ ​ ​ ​ ​ ​ ​ ​ The monitoring parts are arranged along the moving path of the bottle body, and the controller is configured to stop the conveying part (1) from conveying the bottle body to the freeze dryer when any of the monitoring parts detects no bottle body; and / or, The state switching part comprises a reset device, and the reset device is configured to switch the state switching part to the first state when the duration of the state switching part in the second state reaches a predetermined time threshold.

9. The feeding device according to claim 1, characterized in that: The conveying part (1) comprises a chain plate conveyor (101), and a bottle blocking device and / or a guide plate (102) arranged on the chain plate conveyor (101); The bottle blocking device is arranged at the tail of the chain plate conveyor (101) and can be controlled by the controller to prevent the bottle body on the conveying part (1) from being conveyed to the freeze dryer; The guide plate (102) is used to guide the transportation of the bottle body on the chain plate conveyor (101).

10. A freeze-drying production line, characterized in that: The freeze-drying production line is provided with the feeding device according to any one of claims 1 to 9.

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