Aerodynamic cleaning device for filter rod outer diameter measuring instrument

Abstract

The utility model relates to the technical field of filter rod outer diameter detector cleaning, especially a kind of filter rod outer diameter measuring instrument pneumatic cleaning device, including spray head device, spray head device is installed on the cover plate of filter rod outer diameter measuring instrument, wherein spray head device is installed between laser probe and detection perforation, the spray head device is connected with gas source.The utility model is by being arranged between the laser probe and detection perforation of filter rod outer diameter measuring instrument spray head device, can float the tobacco that falls in the inside of measuring instrument, it is blown away using the airflow that jet orifice sprays, and the tobacco that blows is extracted measuring instrument outside, avoid tobacco to adhere on laser probe and interfere with laser propagation and data acquisition, to effectively reduce the failure alarm frequency of measuring instrument due to tobacco falling.

Description

Technical Field

[0001] This utility model relates to the technical field of cleaning filter rod outer diameter measuring instruments, and in particular to a pneumatic cleaning device for filter rod outer diameter measuring instruments. Background Technology

[0002] In the cigarette manufacturing industry, dimensional accuracy is crucial for ensuring cigarette quality. Cigarette laser outer diameter measuring instruments, utilizing non-contact laser detection principles and employing laser diode illumination and a photosensitive sensor array to acquire data, can accurately measure the outer diameter of cigarettes, making them an indispensable quality control device on the production line. Their application has enabled cigarette production to achieve a high level of precision in dimensional control, effectively improving product consistency and overall quality.

[0003] However, in actual production, a prominent technical problem gradually emerged when using this laser outer diameter measuring instrument to measure the outer diameter of the filter rod. Due to the structural characteristics of cigarettes, the tobacco shreds have a certain degree of looseness. During the production process, especially when inspecting near the measuring instrument, the tobacco shreds easily fall into the laser outer diameter measuring instrument. These fallen tobacco shreds may adhere to critical detection components, such as the laser emitting and receiving parts, interfering with the normal propagation of the laser and the accurate acquisition of data. This can cause the measuring instrument to frequently report malfunctions, seriously affecting the accuracy and stability of the measurement.

[0004] Frequent fault alarms not only significantly increase the maintenance workload of the measuring instrument, requiring professionals to spend considerable time and effort on cleaning, calibration, and other maintenance operations, but also directly impact the continuity and efficiency of cigarette production. Frequent shutdowns for equipment repair during production disrupt the production rhythm, increase production costs, and negatively affect the company's economic benefits. Therefore, solving the problem of laser outer diameter measuring instrument malfunctions caused by tobacco falling off has become an urgent technical challenge, and is of great significance for improving cigarette production efficiency and product quality. Utility Model Content

[0005] To address the problem of tobacco falling into the laser outer diameter measuring instrument during cigarette production, causing frequent malfunctions, this invention provides a pneumatic cleaning device for the outer diameter measuring instrument of cigarette filter rods, suitable for cigarette filter rod production lines.

[0006] The solution adopted by this utility model to solve its technical problem is: a pneumatic cleaning device for a filter rod outer diameter measuring instrument, including a nozzle device, which is installed on the cover plate of the filter rod outer diameter measuring instrument. The filter rod outer diameter measuring instrument is equipped with a set of symmetrical laser probes and a set of CCD lenses. A detection hole is provided in the middle of the filter rod outer diameter measuring instrument. Each set of laser probes and each set of CCD lenses are symmetrically distributed with the detection hole as the center. The nozzle device is installed between the laser probes, CCD lenses and detection holes, and the nozzle device is correspondingly set with the laser probes and CCD lenses. The nozzle device is connected to an air source.

[0007] Preferably, the nozzle device between the laser probe and the detection perforation includes a rectangular nozzle fixed on the cover plate and an air inlet pipe connector. The rectangular nozzle is provided with three air jet holes, and the cover plate is provided with three corresponding air inlets. A central air pipe connecting the three air jet holes is provided in the middle of the rectangular nozzle, and an air inlet pipe connector is installed at the end of the central air pipe to connect to an air source.

[0008] Preferably, the nozzle device between the CCD lens and the detection perforation is a nozzle that is inclined toward the CCD lens on the cover plate, and a nozzle pipe connector is installed on the nozzle to connect to the air source.

[0009] Preferably, the air source is equipped with an adjustment module, which includes a pressure reducing valve, a flow controller, and a solenoid valve. The inlet of the pressure reducing valve is connected to the air source, and the outlet is connected to the solenoid valve through the flow controller. The output end of the solenoid valve is connected to the air inlet pipe connector and the jet pipe connector. The solenoid valve is electrically connected to the control system of the filter rod outer diameter measuring instrument to realize the timed triggering or on-demand start of the cleaning action.

[0010] Preferably, the cover plate is provided with mounting holes, the rectangular nozzle is fixed in the mounting groove by bolts, and a sealing gasket is provided on the contact surface between the rectangular nozzle and the cover plate. The sealing gasket is made of aging-resistant rubber material.

[0011] Preferably, both the air intake pipe connector and the jet pipe connector adopt a quick-plug structure, and the connector is equipped with an anti-dislodgement buckle, and the air intake pipe is a flexible hose with a metal shielding layer.

[0012] The beneficial effects of this invention are as follows: By installing a nozzle device between the laser probe, CCD lens, and detection hole of the filter rod outer diameter measuring instrument, this invention can blow up and float tobacco shreds that have fallen inside the measuring instrument. The airflow from the nozzles blows these shreds away. The four nozzles are arranged in a ring around the measuring hole, creating positive pressure within the instrument. This effectively blows tobacco shreds and dust out of the measuring hole, preventing them from obstructing the CCD lens and laser probe, maintaining the cleanliness of the instrument's interior, and creating a favorable environment for stable and accurate measurement of the filter rod's outer diameter. It also prevents tobacco shreds and dust from adhering to the laser probe and interfering with laser propagation and data acquisition, thus effectively reducing the frequency of fault alarms and ensuring stable and accurate measurement. This solution significantly reduces the number of times and time required for professional personnel to clean and calibrate the measuring instrument, reducing maintenance workload and allowing maintenance personnel to focus more on ensuring the smooth operation of other critical production processes. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of the pneumatic cleaning device for the filter rod outer diameter measuring instrument; Figure 2 This is a schematic diagram of the internal structure of the filter rod outer diameter measuring instrument; Figure 3 This is a schematic diagram of the front structure of the pneumatic cleaning device; Figure 4 This is a schematic diagram of the internal structure of a pneumatic cleaning device.

[0014] The following are labels in the diagram: 1. Filter rod outer diameter measuring instrument; 2. Cover plate; 31. Rectangular nozzle; 32. Air inlet pipe connector; 41. Air jet pipe connector; 5. Detection perforation; 6. Laser probe; 21. Air inlet; 22. Air jet nozzle. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below.

[0016] Example 1: This example details the specific implementation of a pneumatic cleaning device for a filter rod outer diameter measuring instrument, in order to solve the problem that tobacco shreds falling into the laser outer diameter measuring instrument during filter rod outer diameter measurement causes frequent malfunctions, increases maintenance workload, and affects production efficiency.

[0017] The filter rod outer diameter measuring instrument 1 is a key piece of equipment on the cigarette production line used for accurately measuring the outer diameter of filter rods. Inside, it houses a set of symmetrical laser probes 6 and a set of symmetrical CCD lenses. A detection perforation 5 is located in the center of the instrument 1, with the laser probes 6 and CCD lenses positioned around it to measure the outer diameter of the filter rod passing through the perforation. Figure 1-4As shown, this utility model involves installing four nozzle devices on the cover plate 2 of the filter rod outer diameter measuring instrument 1, which are also installed around the detection perforation 5 to clean any tobacco residue that may fall into the measuring instrument. Specifically, the nozzle devices are installed between the laser probe 6 and the detection perforation 5, and between the CCD lens and the detection perforation 5. Each nozzle device corresponds to one laser probe 6 or one CCD lens. The four nozzles are all air blowing holes, which are angled holes and are respectively aligned with the laser probe 6 and the CCD lens to prevent dust and colloids from falling on the sensor and affecting the diameter detection. The nozzle devices are connected to an air source, which uses compressed air that is discharged through the opening in the middle of the measuring instrument, indirectly forming positive pressure protection.

[0018] like Figure 1 and 4 As shown, the nozzle device installed between the laser probe 6 and the detection perforation 5 consists of a rectangular nozzle 31 fixed on the cover plate 2 and an air inlet connector 32. The rectangular nozzle 31 has three carefully designed air jet holes, corresponding to three air inlets 21 on the cover plate 2. A central air pipe connecting the three air jet holes is located in the middle of the rectangular nozzle 31, and the end of the central air pipe is fitted with the air inlet connector 32, which connects to an air source. The gas introduced from the air source passes through the air inlet connector 32 and the central air pipe, and is evenly ejected from the three air jet holes, forming an effective purging airflow that blows away and disperses tobacco and dust that fall near the laser probe 6. For example, in actual production, tobacco and dust easily accumulate near the detection perforation 5 and slide towards the laser probe 6. The airflow ejected by the rectangular nozzle 31 can blow away the tobacco before it gets close to the laser probe 6, preventing the tobacco from interfering with the detection of the laser probe 6.

[0019] The nozzle assembly installed between the CCD lens and the detection perforation 5 is relatively simple. It has an air outlet 22 on the cover plate 2, and an air pipe connector 41 is installed on the air outlet 22 to connect to the air source. The four nozzle assemblies are installed in a ring around the measuring hole. The airflow blown out creates positive pressure inside the measuring instrument, which can promptly blow tobacco, dust, etc., out of the measuring instrument from the central measuring hole, preventing tobacco and dust from obstructing the CCD lens and laser probe 6, keeping the inside of the measuring instrument clean, and creating a good environment for the measuring instrument to stably and accurately measure the outer diameter of the filter rod.

[0020] The gas source is equipped with an adjustment module, which includes a pressure reducing valve, a flow controller, and a solenoid valve. The pressure reducing valve inlet is connected to the gas source, and its function is to adjust the gas pressure provided by the gas source to a suitable range to meet the needs of the cleaning work, avoiding damage to the internal components of the measuring instrument due to excessively high gas pressure, or ineffective cleaning of tobacco due to excessively low gas pressure. The outlet is connected to the solenoid valve through the flow controller, which can accurately control the gas flow rate, making the cleaning airflow more stable and precise. The output end of the solenoid valve is connected to the air inlet pipe connector 32 or the jet pipe connector 41, and the solenoid valve is electrically connected to the control system of the filter rod outer diameter measuring instrument 1, realizing timed triggering or on-demand start of the cleaning action.

[0021] In actual production, the opening interval of the solenoid valve can be set through the control system based on production experience and the frequency of tobacco shreds affecting the measuring instrument, thus achieving timed cleaning. For example, during production periods when tobacco shreds fall more frequently, a cleaning action can be set to start every 10 minutes; while during periods when tobacco shreds fall less frequently, the cleaning interval can be appropriately extended. Simultaneously, if the measuring instrument detects abnormal data and determines that it may be due to tobacco shreds interference, the solenoid valve can be manually triggered as needed to perform timely cleaning and ensure that the measuring instrument returns to normal working condition.

[0022] To ensure a tight seal between the nozzle assembly and cover plate 2 and prevent gas leakage from affecting the cleaning effect, mounting holes are provided on cover plate 2. The rectangular nozzle 31 is fixed in the mounting groove with bolts. A sealing gasket is placed on the contact surface between the rectangular nozzle 31 and cover plate 2. The sealing gasket is made of aging-resistant rubber. The aging-resistant rubber sealing gasket can maintain good sealing performance in long-term production environments, adapting to changes in temperature and humidity inside the measuring instrument and potential chemical corrosion. In addition, both the air inlet pipe connector 32 and the air jet pipe connector 41 adopt a quick-plug structure, facilitating rapid connection and disassembly during equipment maintenance or component replacement. Anti-detachment clips are also provided at the connectors to further enhance connection stability and prevent the air pipe from falling off due to vibration or other reasons during equipment operation. Both the air inlet and exhaust pipes are flexible hoses with a metal shielding layer. The metal shielding layer enhances the wear resistance and pressure resistance of the pipes, extending their service life; it also effectively prevents external electromagnetic interference from affecting the internal electronic components of the measuring instrument, ensuring stable and reliable operation. For example, in a cigarette production workshop, there are various electrical devices that are prone to electromagnetic interference. Flexible hoses with metal shielding can effectively resist this interference and ensure the normal operation of cleaning devices and measuring instruments.

[0023] Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

Claims

1. A pneumatic cleaning device for a filter rod outer diameter measuring instrument, characterized in that, The filter rod outer diameter measuring instrument (1) includes a nozzle device, which is installed on the cover plate (2) of the filter rod outer diameter measuring instrument (1). The filter rod outer diameter measuring instrument (1) is equipped with a set of symmetrical laser probes (6) and a set of CCD lenses. The filter rod outer diameter measuring instrument (1) is provided with a detection perforation (5) in the middle. Each set of laser probes (6) and each set of CCD lenses are symmetrically distributed with the detection perforation (5) as the center. The nozzle device is installed between the laser probes (6), CCD lenses and detection perforation (5), and the nozzle device is set in correspondence with the laser probes (6) and CCD lenses. The nozzle device is connected to an air source.

2. The pneumatic cleaning device for the filter rod outer diameter measuring instrument according to claim 1, characterized in that, The nozzle device between the laser probe (6) and the detection perforation (5) includes a rectangular nozzle (31) fixed on the cover plate (2) and an air inlet pipe connector (32). The rectangular nozzle (31) is provided with three air jet holes, and the cover plate (2) is provided with three corresponding air inlets (21). A middle air pipe connecting the three air jet holes is provided in the middle of the rectangular nozzle (31), and an air inlet pipe connector (32) is installed at the end of the middle air pipe. An air source is connected through the air inlet pipe connector (32).

3. The pneumatic cleaning device for the filter rod outer diameter measuring instrument according to claim 1, characterized in that, The nozzle device between the CCD lens and the detection perforation (5) is a nozzle (22) that is inclined toward the CCD lens on the cover plate (2), and a nozzle connector (41) is installed on the nozzle (22) to connect the air source.

4. The pneumatic cleaning device for the filter rod outer diameter measuring instrument according to claim 1, characterized in that, The gas source is equipped with a gas source regulation module, which includes a pressure reducing valve, a flow controller and a solenoid valve. The inlet of the pressure reducing valve is connected to the gas source, and the outlet is connected to the solenoid valve through the flow controller. The output end of the solenoid valve is connected to the air inlet pipe connector (32) and the jet pipe connector (41). The solenoid valve is electrically connected to the control system of the filter rod outer diameter measuring instrument (1) to realize the timed triggering or on-demand start of the cleaning action.

5. The pneumatic cleaning device for the filter rod outer diameter measuring instrument according to claim 1, characterized in that, The cover plate (2) is provided with mounting holes. The rectangular nozzle (31) is fixed in the mounting groove by bolts. A sealing gasket is provided on the contact surface between the rectangular nozzle (31) and the cover plate (2). The sealing gasket is made of aging-resistant rubber material.

6. The pneumatic cleaning device for the filter rod outer diameter measuring instrument according to claim 1, characterized in that, The nozzle device includes an air inlet pipe connector (32) and an air jet pipe connector (41). Both the air inlet pipe connector (32) and the air jet pipe connector (41) adopt a quick-plug structure and are equipped with anti-drop buckles at the connectors. The air inlet pipe is a flexible hose with a metal shielding layer.

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