A cigarette case absence detection device and method based on positive pressure detection principle

Abstract

The present application relates to a kind of based on positive pressure detection principle's cigarette case absence detection device and detection method, wherein detection device includes cigarette package push-in baffle, pressure sensor and control system, cigarette package push-in baffle includes support plate and the push plate of being set on support plate, support plate is connected with packer, hollow cavity is set in push plate, air hole is set on the outer surface of push plate and is communicated with hollow cavity, pressure sensor is set in hollow cavity, pressure sensor is connected with control system electric signal.This technical scheme has higher adaptability, can adapt to different brands, model and specification of cigarette case, without frequent adjustment and maintenance, reduce the complexity of operation and the demand of manual intervention, and have the ability of real-time monitoring and control, once cigarette case absence is detected, control system immediately stops packaging process, ensure timely response problem, reduce the production of unqualified products.

Description

Technical Field

[0001] This invention belongs to the field of cigarette production and testing technology, specifically relating to a cigarette box missing detection device and method based on the positive pressure detection principle. Background Technology

[0002] In the cigarette production and packaging industry, ensuring that each carton contains the correct number of cigarette packs has always been a crucial task. Traditional packaging machines typically employ weighing-type missing pack detection devices. These devices use load cells to measure the weight of each cigarette pack and compare it to a preset standard weight to determine if any packs are missing. While this method is relatively simple in principle and requires high-resolution and repeatable load cells, it still suffers from the following problems in practical applications: 1. Fixed baseline problem: Traditional methods rely on a fixed standard weight as a baseline, which can lead to false positives or false negatives when the standard weights of different brands or types of cigarette packs vary significantly. 2. Zero-point drift problem: Due to external environmental factors or equipment aging, load cells may experience zero-point drift, affecting the stability of the device's performance. 3. High adjustment and maintenance requirements: To ensure accuracy, weighing-type missing pack detection devices require regular maintenance and calibration, demanding a high level of skill to troubleshoot and adjust the equipment. Summary of the Invention

[0003] The purpose of this invention is to provide a cigarette box missing detection device and method based on the positive pressure detection principle, so as to solve the problems existing in the above-mentioned background art.

[0004] To achieve the above objectives, this application employs the following technical solution:

[0005] A cigarette pack missing detection device based on the principle of positive pressure detection includes a cigarette pack pushing baffle, a pressure sensor, and a control system. The cigarette pack pushing baffle includes a support plate and a push plate disposed on the support plate. The support plate is connected to a packaging machine. A hollow cavity is provided inside the push plate. An air hole communicating with the hollow cavity is provided on the outer surface of the push plate. The pressure sensor is disposed inside the hollow cavity and is electrically connected to the control system.

[0006] Preferably, there are ten air vents arranged in two layers, upper and lower.

[0007] Preferably, a pressure sensor is installed in the channel of each air vent, and each pressure sensor is connected to the electrical signal of the control system.

[0008] A method for detecting missing cigarette boxes based on the principle of positive pressure detection, utilizing any of the above-mentioned detection devices, involves the following steps:

[0009] S1. Through multiple calibrations, it is determined that the pressure sensor detects the pressure value range within the standard pressure value range at the moment the cigarette pack pusher pushes the set brand of cigarette boxes into the carton packaging box and during the subsequent packaging process, and the standard pressure value range is stored in the control system.

[0010] S2. During normal production, the pressure sensor detects the instantaneous pressure value at the moment when the cigarette pack is pushed into the packaging box by the baffle and during the subsequent packaging process, and transmits it to the control system.

[0011] S3. The control system receives the instantaneous pressure value from step S2 and compares it with the standard pressure value range from step S1. If the instantaneous pressure value is lower than the minimum value of the standard pressure value range, the current cigarette box group is determined to be an abnormal cigarette box group.

[0012] S4. The control system sends a stop pushing signal to the cigarette pack pusher, the cigarette pack pusher returns to its initial position, and the cigarette pack assembly conveyor belt transports the cigarette pack assembly to the designated process.

[0013] Preferably, in step S1, the cigarette pack group consists of ten packs of cigarettes arranged in two rows, one above the other.

[0014] Preferably, in step S3, if the change in instantaneous pressure value is less than the minimum value of the standard pressure value range, it is determined that there are unqualified cigarette packs or irregular arrangements in the cigarette pack group; if the change in instantaneous pressure value is greater than or equal to the set value, it is determined that there are missing cigarette packs in the cigarette pack group.

[0015] A method for detecting missing cigarette boxes based on the principle of positive pressure detection, utilizing any of the above-mentioned detection devices, involves the following steps:

[0016] S1. Through multiple calibrations, it is determined that the pressure sensor detects the pressure value range within the standard pressure value range at the moment the cigarette pack pusher pushes the set brand of cigarette boxes into the carton packaging box and during the subsequent packaging process, and the standard pressure value range is stored in the control system.

[0017] S2. During normal production, the pressure sensor detects the instantaneous pressure value at the moment when the cigarette pack is pushed into the packaging box by the baffle and during the subsequent packaging process, and transmits it to the control system.

[0018] S3. If the ratio of the instantaneous pressure value of a certain air hole to the atmospheric pressure is less than the set value, it is determined that the smoke pack is missing at the location of the air hole.

[0019] The control system receives the instantaneous pressure value in step S2 and compares it with the standard pressure value range in step S1. If the instantaneous pressure value is lower than the minimum value of the standard pressure value range, it determines that the quality of the tobacco pack corresponding to the air hole is unqualified or the arrangement is irregular.

[0020] S4. The control system sends a stop pushing signal to the cigarette pack pusher, the cigarette pack pusher returns to its initial position, and the cigarette pack assembly conveyor belt transports the cigarette pack assembly to the designated process.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] 1. This technical solution provides an efficient and accurate method for detecting missing cigarette boxes.

[0023] 2. This technical solution has high adaptability and can adapt to cigarette boxes of different brands, models and specifications without frequent adjustments and maintenance, reducing operational complexity and the need for manual intervention.

[0024] 3. This technical solution has the ability to monitor and control in real time. Once a missing cigarette box is detected, the control system will immediately stop the packaging process to ensure timely response to the problem and reduce the production of defective products. Attached Figure Description

[0025] Figure 1 This is a front view of the cigarette pack push-in baffle of the present invention.

[0026] Figure 2 This is a left view of the cigarette pack push-in baffle of the present invention.

[0027] Figure 3 This is a top view of the cigarette pack push-in baffle of the present invention.

[0028] Explanation of reference numerals in the attached figures:

[0029] 1. Hollow cavity; 2. Support plate; 3. Air vent; 4. Push plate. Detailed Implementation

[0030] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings. The following embodiments are merely exemplary and can only be used to explain and illustrate the technical solution of the present invention, and should not be construed as limiting the technical solution of the present invention.

[0031] like Figures 1 to 3 As shown, this application provides a cigarette pack missing detection device based on the positive pressure detection principle, including a cigarette pack push-in baffle, a pressure sensor and a control system. The cigarette pack push-in baffle includes a support plate 2 and a push plate 4 disposed on the support plate 2. The support plate 2 is connected to the packaging machine. In the technical solution of this application, the connection and transmission relationship between the cigarette pack push-in baffle and the cigarette packaging machine are not improved. The existing connection method and appearance structure are still used. Only the internal structure of the cigarette pack push-in baffle is improved.

[0032] The push plate 4 contains a hollow cavity 1. Ten air vents 3, arranged in two rows communicating with the hollow cavity, are located on the outer surface of the push plate. Each air vent 3 corresponds to one of the ten cigarette packs to be pushed into the carton packaging box. A pressure sensor is located within the hollow cavity and is electrically connected to the control system. The pressure sensor monitors the pressure value in real time at the moment the cigarette pack enters the carton packaging box and during the subsequent packaging process, transmitting the pressure value data to the control system. The control system analyzes the data to identify the position, quantity, and status of the cigarette packs. Based on preset rules and thresholds, the system determines whether any cigarette packs are missing. Once a problem is detected, the control system automatically executes an action.

[0033] In other embodiments of this application, a pressure sensor is disposed within the channel of the air vent, and one pressure sensor is disposed in each air vent, and each pressure sensor is connected to the control system electrical signal.

[0034] The working principle of the cigarette pack push-in baffle in this application is as follows:

[0035] A certain air pressure is continuously applied inside the cavity of the cigarette pack pushed into the baffle. When not pushed, since there is no cigarette pack before it is pushed into the baffle, all ten air holes release pressure to the atmosphere. At this time, the pressure value detected by the pressure sensor is atmospheric pressure.

[0036] When the cigarette pack pusher performs the cigarette pack pushing operation, all ten cigarette packs in the cigarette box assembly are in place and correctly arranged. If no cigarette packs are missing, all the air holes of the cigarette pack pusher are in contact with the outer surface of the cigarette pack. At this time, a positive pressure close to the applied pressure will be formed inside the cavity.

[0037] At this time, if one or more cigarette packs are missing or are arranged irregularly, and the ten air holes corresponding to the cavity are not completely blocked, air will penetrate into the cavity. If the cavity cannot reach the specified positive pressure threshold, it will be judged that a cigarette pack is missing, and the control system will trigger an emergency action.

[0038] This application provides a method for detecting missing cigarette boxes based on the principle of positive pressure detection, which utilizes any of the above-mentioned detection devices and takes the following steps:

[0039] S1. Through multiple calibrations, determine the standard pressure range detected by the pressure sensor during the moment the cigarette pack pusher pushes the set brand of cigarette packs into the carton packaging box and during the subsequent packaging process. Store the standard pressure range in the control system. In this step, the focus is on calibrating the standard pressure range. Under the condition that there are no missing cigarette packs in the cigarette pack group and the quality of each cigarette pack is normal (e.g., no empty cigarettes), the pressure inside the cavity is close to positive pressure at the moment the cigarette pack pusher pushes the packs and during the subsequent packaging process because the air vents are completely blocked. However, there will still be a small range of fluctuation. This fluctuation range is the standard pressure range. The specific number of calibrations is determined as needed.

[0040] S2. During normal production, the pressure sensor detects the instantaneous pressure value at the moment when the cigarette pack is pushed into the packaging box by the baffle and during the subsequent packaging process, and transmits it to the control system.

[0041] S3. The control system receives the instantaneous pressure value from step S2 and compares it with the standard pressure value range from step S1. If the instantaneous pressure value is lower than the minimum value of the standard pressure value range, it is determined that the current cigarette pack group is an abnormal cigarette pack group. In this case, if the change in instantaneous pressure value is less than the set value when the instantaneous pressure value is lower than the minimum value of the standard pressure value range, it is determined that there are unqualified cigarette packs or irregular arrangements in the cigarette pack group. If the change in instantaneous pressure value is greater than the set value, it is determined that there are missing cigarette packs in the cigarette pack group.

[0042] S4. The control system sends a stop pushing signal to the cigarette pack pusher, the cigarette pack pusher returns to its initial position, and the cigarette pack assembly conveyor belt transports the cigarette pack assembly to the designated process.

[0043] In other embodiments of this application, specifically, a pressure sensor is provided in the channel of each air vent, and the detection method is as follows when each pressure sensor is connected to the electrical signal of the control system:

[0044] A method for detecting missing cigarette boxes based on the principle of positive pressure detection, utilizing any of the above-mentioned detection devices, involves the following steps:

[0045] S1. Through multiple calibrations, it is determined that the pressure sensor detects a pressure value within the standard pressure range at the moment the cigarette pack pusher pushes the set brand of cigarette boxes into the carton packaging box and during the subsequent packaging process, and the standard pressure value range is stored in the control system.

[0046] S2. During normal production, the pressure sensor detects the instantaneous pressure value at the moment the cigarette pack is pushed into the packaging box by the baffle and during the subsequent packaging process, and transmits it to the control system.

[0047] S3. If the ratio of the instantaneous pressure value of a certain air vent to the atmospheric pressure is less than the set value, it is determined that the smoke pack is missing at the location of that air vent.

[0048] The control system receives the instantaneous pressure value in step S2 and compares it with the standard pressure value range in step S1. If the instantaneous pressure value is lower than the minimum value of the standard pressure value range, it determines that the quality of the tobacco pack corresponding to the air hole is unqualified or the arrangement is irregular.

[0049] S4. The control system sends a stop pushing signal to the cigarette pack pusher, the cigarette pack pusher returns to its initial position, and the cigarette pack assembly conveyor belt transports the cigarette pack assembly to the designated process.

[0050] At present, when problems such as missing or substandard cigarette packs are detected, the usual approach is to send an alarm signal and stop the machine. The operator then manually resolves the issue before restarting the equipment. However, stopping and restarting the packaging equipment can affect packaging efficiency.

[0051] In this technical solution, when the intelligent control system sends a stop pushing signal, the cigarette box pusher stops pushing and returns to its original position. The cigarette box conveyor belt then moves the cigarette box group to the next position. This next position can be the downstream set position for carton packaging, or it can be the position where the problematic cigarette box group is connected to the cigarette box conveyor belt. In this way, the cigarette box conveyor belt does not need to stop running, but the next cigarette box group is transported over for carton packaging, thus not affecting the normal working speed of the production line.

[0052] At this point, if there are no issues such as missing cigarette boxes, incorrect position or arrangement of cigarette boxes in the subsequent defective cigarette box group, the cigarette box group can be manually or automatically supplemented or adjusted to become a qualified cigarette box group and then returned to the production line for further packaging. For cigarette packs that are judged to have problems with the cigarettes inside, they are manually removed and then new cigarette packs are added to form a qualified cigarette box group and returned to the production line for further packaging.

[0053] The above description is merely an embodiment of this application and is not intended to limit this application in any way. Although this application discloses preferred embodiments as described above, it is not intended to limit this application. Any changes or modifications made by those skilled in the art without departing from the scope of the technical solution of this application using the disclosed technical content are equivalent to equivalent implementation cases and fall within the scope of the technical solution.

Claims

1. A method for detecting missing cigarette packs based on the principle of positive pressure detection, using a detection device, the detection device including a cigarette pack push-in baffle, a pressure sensor and a control system, the cigarette pack push-in baffle including a support plate and a push plate disposed on the support plate, the support plate being connected to a packaging machine, the push plate having a hollow cavity inside, and air holes communicating with the hollow cavity being disposed on the outer surface of the push plate. There are ten air vents, arranged in two layers, upper and lower; A pressure sensor is installed in the channel of each air vent, and each pressure sensor is connected to the electrical signal of the control system. Its characteristic is that... Take the following steps: S1. Through multiple calibrations, it is determined that the pressure sensor detects the pressure value range within the standard pressure value range at the moment the cigarette pack pusher pushes the set brand of cigarette boxes into the carton packaging box and during the subsequent packaging process, and the standard pressure value range is stored in the control system. S2. During normal production, the pressure sensor detects the instantaneous pressure value at the moment when the cigarette pack is pushed into the packaging box by the baffle and during the subsequent packaging process, and transmits it to the control system. S3. The control system receives the instantaneous pressure value from step S2 and compares it with the standard pressure value range from step S1. If the instantaneous pressure value is lower than the minimum value of the standard pressure value range, the current cigarette box group is determined to be an abnormal cigarette box group. S4. The control system sends a stop pushing signal to the cigarette pack pusher, the cigarette pack pusher returns to its initial position, and the cigarette pack assembly conveyor belt transports the cigarette pack assembly to the designated process.

2. The cigarette box missing detection method based on the positive pressure detection principle according to claim 1, characterized in that, In step S1, the cigarette pack set consists of ten packs of cigarettes arranged in two rows, one above the other.

3. The cigarette box missing detection method based on the positive pressure detection principle according to claim 1, characterized in that, In step S3, if the instantaneous pressure value is lower than the minimum value of the standard pressure value range, and the change in the instantaneous pressure value is less than the set value, it is determined that there are unqualified cigarette packs or irregular arrangements in the cigarette pack group; if the change in the instantaneous pressure value is greater than or equal to the set value, it is determined that there are missing cigarette packs in the cigarette pack group.

4. A method for detecting missing cigarette packs based on the principle of positive pressure detection, using a detection device, the detection device including a cigarette pack push-in baffle, a pressure sensor and a control system, the cigarette pack push-in baffle including a support plate and a push plate disposed on the support plate, the support plate being connected to a packaging machine, the push plate having a hollow cavity inside, and air holes communicating with the hollow cavity being disposed on the outer surface of the push plate. There are ten air vents, arranged in two layers, upper and lower; A pressure sensor is installed in the channel of each air vent, and each pressure sensor is connected to the electrical signal of the control system. Its characteristic is that... Take the following steps: S1. Through multiple calibrations, it is determined that the pressure sensor detects the pressure value range within the standard pressure value range at the moment the cigarette pack pusher pushes the set brand of cigarette boxes into the carton packaging box and during the subsequent packaging process, and the standard pressure value range is stored in the control system. S2. During normal production, the pressure sensor detects the instantaneous pressure value at the moment when the cigarette pack is pushed into the packaging box by the baffle and during the subsequent packaging process, and transmits it to the control system. S3. If the difference between the instantaneous pressure value of a certain air hole and the atmospheric pressure is less than the set value, it is determined that the smoke pack is missing at the location of the air hole. The control system receives the instantaneous pressure value in step S2 and compares it with the standard pressure value range in step S1. If the instantaneous pressure value is lower than the minimum value of the standard pressure value range, it determines that the quality of the tobacco pack corresponding to the air hole is unqualified or the arrangement is irregular. S4. The control system sends a stop pushing signal to the cigarette pack pusher, the cigarette pack pusher returns to its initial position, and the cigarette pack assembly conveyor belt transports the cigarette pack assembly to the designated process.

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