Rapid detection device for steam pipeline leakage of material frying plate of KLD-2 thin-plate cut-tobacco dryer

Abstract

The utility model discloses a quick detection device for leakage of a steam pipeline of a frying plate of a KLD-2 thin-plate cut-tobacco dryer. The quick detection device comprises an online detection device and an offline detection device, the online detection device comprises a temperature and humidity instrument and a PLC (Programmable Logic Controller) electric controller; the offline detection device comprises a compressed air source, a stop valve, a pneumatic three-way ball valve, a pneumatic ball valve, a compressed air pressure reducing valve, a mass flow meter, a pipeline collection box, a spare part box and a moving trolley. Maintenance personnel inspect the detection condition of the device, the average consumed time is 17.5 minutes, and compared with 75.6 minutes before development, the speed is improved by 432%. The device has the advantages of being convenient to use, firm, durable, movable, convenient to detect by maintenance personnel and the like, and the maintenance time of the cut-tobacco dryer is shortened.

Description

Technical Field

[0001] The utility model relates to the field of cigarette cutting equipment, in particular to a quick detection device for leakage of steam pipelines of a frying plate of a KLD-2 thin-plate cutting machine. Background Art

[0002] The KLD-2 tobacco drying machine is a two-stage thin plate tobacco drying machine. The tobacco drying machine is divided into two sections of temperature control. According to the process requirements of different brands, the different cylinder temperatures of the front and rear sections can be adjusted to meet different control requirements. The machine adopts a new design concept for modular design. Different steam interfaces are provided in different heating areas. A cylinder is divided into different temperature reaction areas (or not divided), and zone temperature control can be performed according to process requirements to achieve the purpose of using different processing temperatures for different group modules. The temperature control of the segmented area can effectively reduce the amount of dry head and dry tail, and achieve more stable moisture control of the tobacco outlet. The tobacco heating and lifting plate of this equipment adopts a 30° inclination design, which extends the residence time of the material on the lifting plate and ensures uniform drying of the material.

[0003] Currently, detecting leaks in thin-plate tofu dryers requires not only injecting water into the steam pipes beforehand but also draining the remaining water after repairing the leak. Statistics show that detecting a leak in a single-plate steam pipe takes an average of 75.6 minutes. This process is time-consuming and labor-intensive, requiring a high level of technical expertise from maintenance personnel, significantly impacting their work and rest. Utility Model Content

[0004] The purpose of this utility model is to address the aforementioned issues by designing a mobile, online, and automatic pipeline leak detection device. This device can determine if a steam pipeline leak exists, shorten the time required to inspect the steam pipelines of thin-plate tofu drying machines, and quickly locate the leak. This device is named the KLD-2 Thin-plate tofu drying machine stir-fry plate steam pipeline rapid leak detection device, or simply the tofu drying machine stir-fry plate detection device.

[0005] The utility model achieves the above-mentioned purpose through the following technical solutions:

[0006] The utility model provides a KLD-2 thin plate tofu drying machine stir-frying plate steam pipeline leakage rapid detection device, including an online detection device and an offline detection device. The online detection device is fixedly installed at the inlet and outlet of the tofu drying machine cylinder, and the offline detection device is detachably connected to the tofu drying machine cylinder.

[0007] As a preferred embodiment of the present invention, the online detection device includes a temperature and humidity meter and a PLC electronic control. There are two temperature and humidity meters, which are respectively installed at the tobacco inlet and moisture outlet of the tobacco drying machine cylinder and connected to the PLC electronic control.

[0008] As a preferred embodiment of the present invention, the offline detection device includes a compressed air source, a pneumatic three-way ball valve, a stop valve, a pneumatic ball valve, a compressed air pressure reducing valve, a mobile trolley, a pipeline collection box, a spare parts box, and a mass flow meter. One end of the detection device stop valve is connected to the compressed air source to control the on / off of the compressed air of the entire detection device; the pneumatic three-way ball valve is used to automatically control the intake / exhaust operation of the compressed air in the pipeline; the pneumatic ball valve realizes the automatic on / off of the compressed air in the pipeline; the compressed air pressure reducing valve is used to control and stabilize the pressure value of the compressed air in the pipeline, and its outlet end is connected to the steam pipeline of the frying plate of the silk drying machine; the pipeline collection box is used to collect the connecting pipe of the steam pipeline of the frying plate of the silk drying machine; the mass flow meter is used to count the cumulative mass of the compressed air per unit time; the spare parts box is used to collect / store flange accessories connected to the pipeline of the silk drying machine; the mobile trolley is used to carry the entire device to achieve the mobility of the device.

[0009] The beneficial effects of this utility model are as follows: After the development of the KLD-2 thin-plate tofu drying machine's steam pipe leak rapid detection device, maintenance personnel tested it and found that the average detection time was 17.5 minutes, a 432% improvement compared to the 75.6 minutes before the development. This device is easy to use, durable, portable, and easy for maintenance personnel to detect, thus shortening the tofu drying machine's maintenance time. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 The utility model is a structural schematic diagram of a rapid detection device for leakage of steam pipeline of a frying plate of a KLD-2 thin plate tofu drying machine.

[0011] Figure 2 This is a structural schematic diagram of an off-line detection device for a rapid detection device for leakage of steam pipelines of a frying plate of a KLD-2 thin plate tofu drying machine according to the present invention.

[0012] In the figure: 1-stop valve, 2-pneumatic three-way ball valve, 3-pneumatic ball valve, 4-pressure reducing valve, 5-mass flow meter, 6-pipeline collection box, 7-spare parts box, 8-mobile trolley. DETAILED DESCRIPTION

[0013] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more apparent, the technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the embodiments of the present invention. It should be understood that the described embodiments are only a portion of the embodiments of the present invention, not all of them. Generally, the components of the embodiments of the present invention described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations.

[0014] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0015] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0016] In the description of the present utility model, it should be understood that the terms "upper", "lower", "inside", "outside", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are directions or positional relationships in which the utility model product is usually placed when in use, or are directions or positional relationships commonly understood by those skilled in the art. These directions or positional relationships are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present utility model.

[0017] Furthermore, the terms “first”, “second”, etc. are merely used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0018] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, terms such as "disposed" and "connected" should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0019] The specific implementation of the present invention is described in detail below with reference to the accompanying drawings.

[0020] As attached Figure 1-2As shown, this embodiment provides a KLD-2 thin-plate tofu drying machine's steam pipeline rapid leak detection device, including an online detection device and an offline detection device. The online detection device is fixedly installed at the inlet and outlet of the tofu drying machine's cylinder, while the offline detection device is detachably connected to the tofu drying machine's cylinder. The online detection device includes a temperature and humidity meter and a PLC electronic control. Two temperature and humidity meters are installed at the tobacco inlet and moisture outlet of the tofu drying machine's cylinder, respectively, and are connected to the PLC electronic control. The offline detection device includes a compressed air source, a shut-off valve 1, a pneumatic three-way ball valve 2, a pneumatic ball valve 3, a compressed air pressure reducing valve 4, a mass flow meter 5, a pipeline collection box 6, a spare parts box 7, and a mobile cart 8. One end of the stop valve 1 of the detection device is connected to the compressed air source to control the on and off of the compressed air of the entire detection device; the pneumatic three-way ball valve 2 is used to automatically control the intake / exhaust operation of the compressed air in the pipeline; the pneumatic ball valve 3 realizes the automatic on and off of the compressed air in the pipeline; the compressed air reducing valve 4 is used to control and stabilize the pressure value of the compressed air in the pipeline, and its outlet end is connected to the steam pipeline of the frying plate of the silk drying machine; the pipeline collecting box 6 is used to collect the connecting pipes of the steam pipeline of the frying plate of the silk drying machine; the mass flow meter 5 is used to count the cumulative mass of the compressed air per unit time; the spare parts box 7 is used to collect / store flange accessories connected to the silk drying machine pipeline, etc.; the mobile trolley 8 is used to carry the entire device to realize the mobility of the device.

[0021] The offline testing device's main structure consists of a flexible, integrated body, a compressed air compressor, and a pressure-regulating valve. The flexible body is constructed from 304 stainless steel and features a rectangular shape to maximize internal wall stress. To accommodate the body's forward and backward movement, the main structure utilizes a fixed pulley at the front and a movable pulley at the rear. The pressure-regulating valve utilizes a Festo diaphragm-type valve, which offers low replacement frequency and high precision.

[0022] The connection between the offline detection device and the tofu drying machine pipeline adopts a flange connection with good stability and sealing performance, and the connecting pipeline adopts an air compressor pipe.

[0023] Specific implementation: First, connect the inlet (stop valve 1) of the offline detection device to a compressed air source, and the outlet (outlet of mass flowmeter 5) to the inlet of the steam pipeline for the tofu dryer (flange connection). Use a masking flange to seal the outlet of the main steam pipeline. Then, use pneumatic three-way ball valve 2, pneumatic ball valve 3, and pressure reducing valve 4 to pressurize the tofu dryer to 0.4 MPa.

[0024] The detection principle is as follows:

[0025] Detection stage 1: During the startup preheating period of the tobacco drying machine, the average temperature and humidity measured by the thermometer and humidity meter at the tobacco inlet is recorded as RH1, and the average temperature and humidity measured by the thermometer and humidity meter at the moisture outlet is recorded as RH2.

[0026] When RH2-RH1≥15%rh for more than 10 minutes, the PLC system issues an early warning of equipment steam pipeline leakage. At this time, an offline detection device is used to conduct phase 2 inspection.

[0027] Testing Phase 2: If the drying plate pipeline is intact, the entire pipeline is filled with compressed air using the testing device. The device operates for a time t, and the instantaneous flow rate value V1 on mass flow meter 5 equals 0 m / s. The PLC electronic control system records the accumulated mass m1 displayed on mass flow meter 5. If the drying plate pipeline is damaged, the device is used to inflate the entire pipeline for a time t, and the instantaneous flow rate value on mass flow meter 5 equals V2, resulting in an accumulated mass m2.

[0028] At this point, we can get: the system detects the cumulative mass difference △m = m2-m1;

[0029] System instantaneous speed difference △V=V2-V1;

[0030] Method for judging whether there is leakage in the steam system of the tobacco drying machine barrel:

[0031] Condition I: When compared with the original memory value of the PLC electronic control system, △m ≥ 0, it means that there is a leak in the steam pipeline of the frying plate of the tofu drying machine, and the PLC electronic control system can display an alarm signal;

[0032] Condition II: When △V≥0, it indicates that there is a leak in the steam pipeline of the frying plate of the tofu drying machine, and the PLC electronic control system can display an alarm signal;

[0033] When both conditions I and II are triggered, the system determines a leak in the tofu drying machine's steam piping. It then uses colored gas to locate the leak in the drying machine's stir-fry plate piping. After testing, the system automatically vents the system using a pneumatic three-way valve.

[0034] After the development of the KLD-2 thin plate shredded tofu drying machine's frying plate steam pipeline rapid detection device was completed, maintenance personnel inspected its detection results and found that the average detection time was 17.5 minutes, a 432% increase compared to the 75.6 minutes before development.

[0035] Although the present invention is described herein with reference to the illustrative embodiments of the present invention, the above embodiments are merely preferred embodiments of the present invention, and the embodiments of the present invention are not limited to the above embodiments. It should be understood that those skilled in the art can design many other modifications and implementations, which will fall within the scope and spirit of the principles disclosed in this application.

Claims

1. A KLD-2 thin plate tofu drying machine frying plate steam pipeline rapid leakage detection device, characterized by: It includes an online detection device and an offline detection device. The online detection device is fixedly installed at the inlet and outlet of the fiber drying machine cylinder, and the offline detection device is detachably connected to the fiber drying machine cylinder.

2. The KLD-2 thin plate tofu drying machine frying plate steam pipeline leakage rapid detection device according to claim 1, characterized in that: The online detection device includes a temperature and humidity meter and a PLC electronic control. There are two temperature and humidity meters, which are respectively installed at the tobacco inlet and moisture outlet of the tobacco drying machine cylinder and connected to the PLC electronic control.

3. The KLD-2 thin plate tofu drying machine frying plate steam pipeline leakage rapid detection device according to claim 1, characterized in that: The offline detection device comprises a compressed air source, a stop valve (1), a pneumatic three-way ball valve (2), a pneumatic ball valve (3), a compressed air pressure reducing valve (4), a mass flow meter (5), a pipeline collection box (6), a spare parts box (7), and a mobile trolley (8); one end of the detection device stop valve (1) is connected to the compressed air source to control the on-off of the compressed air of the entire detection device; the pneumatic three-way ball valve (2) is used to automatically control the intake / exhaust operation of the compressed air in the pipeline; the pneumatic ball valve (3) realizes the automatic on-off of the compressed air in the pipeline; the compressed air pressure reducing valve (4) is used to control and stabilize the pressure value of the compressed air in the pipeline, and its outlet end is connected to the steam pipeline of the frying plate of the silk drying machine; The mass flow meter (5) is used to count the cumulative mass of compressed air per unit time; the pipeline collection box (6) is used to collect the connecting pipes of the steam pipeline of the frying plate of the silk drying machine; the spare parts box (7) is used to collect / store the flange accessories connected to the pipeline of the silk drying machine; the mobile trolley (8) is used to carry the entire device to achieve the mobility of the device.

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