CN109928195B - Method for detecting abnormal operation of discharging push rod of freeze dryer - Google Patents
Method for detecting abnormal operation of discharging push rod of freeze dryer Download PDFInfo
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- CN109928195B CN109928195B CN201711365961.2A CN201711365961A CN109928195B CN 109928195 B CN109928195 B CN 109928195B CN 201711365961 A CN201711365961 A CN 201711365961A CN 109928195 B CN109928195 B CN 109928195B
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Abstract
The invention discloses a method for detecting abnormal operation of a discharge push rod of a freeze dryer, which comprises the following steps: s1: establishing a detection area: establishing laser detection rays at two side edges of a push plate close to a discharging push rod in a freeze dryer box body, wherein the laser detection rays are matched with the stroke of the push plate; s2: pushing materials: the discharging push rod drives the push plate to realize the pushing action; s3: and (3) detection: in the process of step S2, a signal indicating whether an obstacle is present in the laser detection radiation is fed back in real time; s4: and (3) judging: if the laser detection ray is fed back without a signal blocked by an obstacle, the discharging push rod continues to normally operate, and if the laser detection ray is fed back with a signal blocked by an obstacle, the discharging push rod stops operating and sends out a maintenance alarm signal. The invention has the advantages of real-time high efficiency, stability and reliability, and capability of greatly reducing the abnormal operation risk of the discharging push rod.
Description
Technical Field
The invention mainly relates to the field of food and pharmaceutical packaging, in particular to a method for detecting abnormal operation of a discharge push rod of a freeze dryer.
Background
The automatic discharging system of freeze dryer generally uses the ejection of compact push rod, with the steady release of the medicine bottle on the freeze dryer plate layer. But ejection of compact push rod atress inequality can appear occasionally, leads to ejection of compact push rod to break away from sheet layer direction barrier (ejection of compact push rod does not move in the direction barrier, goes out the barrier partially, ejection of compact push rod one side moves above the barrier), causes the bottle of falling easily, causes ejection of compact push rod serious deformation when serious. In the prior art, the judgment of the running state is generally made by adopting the current feedback of a servo motor of the discharging push rod, when the current is greater than the set current, the abnormal stress of the discharging push rod is proved, then the PLC makes an alarm output, and the running of the discharging push rod is stopped. However, the detection method cannot give abnormal feedback in advance, and when the abnormality is detected, the discharging push rod is deformed or the production is adversely affected.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a method for detecting the abnormal operation of the discharging push rod of the freeze dryer, which is real-time, efficient, stable and reliable and can greatly reduce the abnormal operation risk of the discharging push rod.
In order to solve the technical problems, the invention adopts the following technical scheme:
a method for detecting abnormal operation of a discharging push rod of a freeze dryer comprises the following steps:
s1: establishing a detection area: establishing laser detection rays at two side edges of a push plate close to a discharging push rod in a freeze dryer box body, wherein the laser detection rays are matched with the stroke of the push plate;
s2: pushing materials: the discharging push rod drives the push plate to realize the pushing action;
s3: and (3) detection: in the process of step S2, a signal indicating whether an obstacle is present in the laser detection radiation is fed back in real time;
s4: and (3) judging: if the laser detection ray is fed back without a signal blocked by an obstacle, the discharging push rod continues to normally operate, and if the laser detection ray is fed back with a signal blocked by an obstacle, the discharging push rod stops operating and sends out a maintenance alarm signal.
As a further improvement of the above technical solution:
in step S1, two laser detection beams are established above the bottom guide fence.
In step S1, a sight glass hole is formed at the two sides of the push plate near the discharging push rod on the rear wall of the freeze dryer box, a sight glass is installed, and a laser detection ray is formed by emitting from the sight glass and the sight glass hole through a laser range finder.
In step S3, a laser range finder feeds back a laser detection beam blocking signal in real time.
In step S4, the PLC control unit controls the operation or stop of the discharge push rod according to the presence or absence of an obstacle blocking signal fed back by the laser range finder, and when the discharge push rod is controlled to stop, the PLC control unit sends out a maintenance alarm signal.
Compared with the prior art, the invention has the advantages that:
according to the method for detecting the abnormal operation of the discharging push rod of the freeze dryer, when the freeze dryer discharges materials, when the push plate of the discharging push rod operates between two laser detection rays, the laser detection rays are not blocked by obstacles, a laser detection ray barrier-free signal is fed back, and the discharging push rod continues to operate normally; if the push plate or the bottle body deviates from any one laser detection ray, the laser detection ray can be blocked, the laser detection ray is fed back to have a barrier blocking signal, the discharging push rod stops running, and an alarm is sent to prompt an operator to manually overhaul. The method adopts laser detection rays to monitor the running state of the discharging push rod in real time, can quickly feed back and control the abnormal running state of the discharging push rod in real time, is real-time and efficient in the whole process, is stable and reliable, and greatly reduces the risk brought by the abnormal running of the discharging push rod.
Drawings
FIG. 1 is a schematic flow diagram of the present invention.
Fig. 2 is a schematic front view of the present invention.
Fig. 3 is a schematic top view of an embodiment of the present invention.
The reference numerals in the figures denote:
1. a freeze dryer box body; 11. a sight glass hole; 12. a sight glass; 2. a discharging push rod; 21. pushing the plate; 3. a guide barrier; 4. a laser range finder; 5. and a PLC control unit.
Detailed Description
The invention will be described in further detail below with reference to the drawings and specific examples.
Fig. 1 to 3 show an embodiment of the method for detecting abnormal operation of the discharging push rod of the freeze dryer of the present invention, which comprises the following steps:
s1: establishing a detection area: establishing laser detection rays at two sides of the push plate 21 close to the discharge push rod 2 in the box body 1 of the freeze dryer, wherein the laser detection rays are matched with the stroke of the push plate 21;
s2: pushing materials: the discharging push rod 2 drives the push plate 21 to realize the pushing action;
s3: and (3) detection: in the process of step S2, a signal indicating whether an obstacle is present in the laser detection radiation is fed back in real time;
s4: and (3) judging: if the laser detection ray is fed back without a signal blocked by an obstacle, the discharging push rod 2 continues to normally operate, and if the laser detection ray is fed back with a signal blocked by an obstacle, the discharging push rod 2 stops operating and sends out a maintenance alarm signal.
By adopting the method, when the freeze dryer discharges materials, when the push plate 21 of the discharge push rod 2 runs between two laser detection rays, the laser detection rays are not blocked by obstacles, a laser detection ray barrier-free signal is fed back, and the discharge push rod 2 continues to run normally; if push pedal 21 or bottle deviate from arbitrary laser detection ray, then can laser detection ray can be blocked, and feedback laser detection ray has the barrier to block the signal, and ejection of compact push rod 2 stall sends the warning and reminds operating personnel to carry out manual maintenance processing. The method adopts the laser detection ray to monitor the running state of the discharging push rod 2 in real time, can quickly feed back and control the abnormal running state of the discharging push rod 2 in real time, has real-time and high efficiency in the whole process, is stable and reliable, and greatly reduces the risk brought by the abnormal running of the discharging push rod 2.
In this embodiment, in step S1, two laser detection beams are established above the bottom guide fence 3. Transfer the setting like this and make the detection zone be located the top of direction barrier 3, form the straight line detection at the top one end of direction barrier 3 to the other end, when the laser detection ray of arbitrary side is obstructed, then explain push pedal 21 and deviate from the propelling movement track, ejection of compact push rod 2 stall sends the suggestion operating personnel of reporting to the police and carries out manual maintenance processing.
In this embodiment, in step S1, a sight glass hole 11 is formed at both side edges of the push plate 21 near the discharging push rod 2 on the rear wall of the freeze dryer case 1, a sight glass 12 is installed, and a laser detection ray is emitted from the sight glass 12 and the sight glass hole 11 by the laser range finder 4. This sight glass hole 11 make laser range finder 4 can install on freeze dryer box 1, improved the convenience of installation, and the setting of sight glass 12 has then guaranteed the detection precision.
In this embodiment, in step S3, the laser range finder 4 feeds back a signal indicating whether there is an obstacle in the laser detection beam in real time. Laser range finder 4 transmission laser detects the ray to feedback laser detection ray in real time and have or not the barrier to block the signal, in order to realize carrying out real time monitoring to ejection of compact push rod 2's running state, can be real-time quick make feedback and control to ejection of compact push rod 2's unusual running state.
In this embodiment, in step S4, the PLC control unit 5 controls the operation or stop of the discharging rod 2 according to the feedback of the existence of the obstacle blocking signal from the laser range finder 4, and when the discharging rod 2 is controlled to stop, the PLC control unit 5 sends out a maintenance alarm signal. The PLC control unit 5 obtains a feedback signal of the laser range finder 4, controls the discharge push rod 2 to run or stop according to the signal, and simultaneously sends out a maintenance alarm signal through the PLC control unit 5, so that the automatic detection and control of the whole process are realized.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make numerous possible variations and modifications to the present invention, or modify equivalent embodiments to equivalent variations, without departing from the scope of the invention, using the teachings disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention should fall within the protection scope of the technical scheme of the present invention, unless the technical spirit of the present invention departs from the content of the technical scheme of the present invention.
Claims (4)
1. The method for detecting abnormal operation of the discharging push rod of the freeze dryer is characterized by comprising the following steps of: the method comprises the following steps:
s1: establishing a detection area: laser detection rays are established on two sides of a push plate (21) close to a discharging push rod (2) in a freeze dryer box body (1), the laser detection rays are matched with the stroke of the push plate (21), sight glass holes (11) are arranged on two sides of the push plate (21) close to the discharging push rod (2) on the rear wall of the freeze dryer box body (1), sight glasses (12) are installed, and the laser detection rays are emitted from the sight glasses (12) and the sight glass holes (11) through a laser range finder (4) to form laser detection rays;
s2: pushing materials: the discharging push rod (2) drives the push plate (21) to realize the pushing action;
s3: and (3) detection: in the process of step S2, a signal indicating whether an obstacle is present in the laser detection radiation is fed back in real time;
s4: and (3) judging: if the laser detection ray is fed back without a signal blocked by an obstacle, the discharging push rod (2) continues to normally operate, and if the laser detection ray is fed back with a signal blocked by an obstacle, the discharging push rod (2) stops operating and sends out a maintenance alarm signal.
2. The method for detecting the abnormal operation of the discharging push rod of the freeze dryer according to claim 1, which is characterized in that: in step S1, two laser detection beams are established above the bottom guide fence (3).
3. The method for detecting the abnormal operation of the discharging push rod of the freeze dryer according to claim 1, which is characterized in that: in step S3, a laser rangefinder (4) feeds back a laser detection beam blocking signal in real time.
4. The method for detecting the abnormal operation of the discharging push rod of the freeze dryer according to claim 3, characterized in that: in step S4, the PLC control unit (5) controls the discharging push rod (2) to operate or stop according to the signal fed back by the laser range finder (4) whether the obstacle blocks, and when the discharging push rod (2) is controlled to stop, the PLC control unit (5) sends out a maintenance alarm signal.
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| CN201711365961.2A CN109928195B (en) | 2017-12-18 | 2017-12-18 | Method for detecting abnormal operation of discharging push rod of freeze dryer |
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| CN201711365961.2A CN109928195B (en) | 2017-12-18 | 2017-12-18 | Method for detecting abnormal operation of discharging push rod of freeze dryer |
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| CN109928195A CN109928195A (en) | 2019-06-25 |
| CN109928195B true CN109928195B (en) | 2021-01-01 |
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| JPS6171383A (en) * | 1984-09-17 | 1986-04-12 | Canon Inc | Wafer position detector |
| CN2795139Y (en) * | 2005-05-08 | 2006-07-12 | 江苏天奇物流系统工程股份有限公司 | On-line three dimension intelligent detector for prized body |
| WO2007084124A1 (en) * | 2006-01-18 | 2007-07-26 | Applied Materials, Inc. | Sensors for dynamically detecting substrate breakage and misalignment of a moving substrate |
| CN102749029B (en) * | 2012-03-31 | 2016-01-20 | 马钢(集团)控股有限公司 | A kind of supervising device along rail linearity operational outfit |
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