A kind of impregnator liquid level probe blowing device

Abstract

The present invention discloses a blowing device for an impregnator liquid level probe, comprising: an air inlet pipe, wherein the air outlet end side of the air inlet pipe is provided with three air outlet pipes, and the three air outlet pipes are respectively and correspondingly installed in the low, middle and high liquid level holes of the impregnator; a temperature detector, wherein the temperature detectors are respectively arranged in the air outlet pipes in the three liquid level holes; and an electromagnetic stop valve, wherein the electromagnetic stop valve is arranged on the air inlet pipe and is used to open or close the compressed air path of the air inlet pipe. The device can effectively complete the cleaning and blowing of impurities attached to the liquid level hole and the temperature probe of the impregnator, and ensure smooth production.

Description

Technical Field

[0001] The invention relates to the technical field of immersers, and more particularly to an immerser liquid level probe blowing device. Background Art

[0002] In the 1140kg / h carbon dioxide expanded tobacco production line, the impregnator is the main process equipment for tobacco expansion. It mainly soaks the tobacco with carbon dioxide liquid at a certain pressure in the impregnator so that the carbon dioxide liquid can fully penetrate into the tobacco cell tissue, and then converts the carbon dioxide liquid inside the tobacco cell tissue into dry ice (solid) through drainage, pressure reduction and other means, thus forming dry ice tobacco.

[0003] During the impregnation step, in order to control the amount of carbon dioxide liquid filled, three liquid level holes, low, medium and high, are set in the impregnation. The control method is to install temperature probes in the low, medium and high liquid level holes, and use the low temperature property of carbon dioxide liquid to detect the temperature through the temperature probe to achieve liquid level detection. In the 1140kg / h carbon dioxide expanded tobacco production line, when the carbon dioxide liquid is filled into the impregnation machine, the filling is stopped when the low and medium liquid level temperatures are lower than -2°C. After the tobacco is soaked for a certain period of time, the impregnation machine discharges the carbon dioxide liquid into the process tank, and the air pressure in the impregnation machine is discharged through the primary and secondary pressure discharges. Then the bottom cover of the impregnation machine is opened, and the tobacco enters the next process.

[0004] During the process of tobacco impregnation, impurities such as tobacco dust and smoke dust in the tobacco will float on the surface of the carbon dioxide liquid. Since the carbon dioxide liquid level is basically level with the middle liquid level hole, some of the tobacco dust and smoke dust will float at the liquid level probe hole. When the tobacco impregnation step is completed, the carbon dioxide liquid is recovered and the carbon dioxide gas is discharged, the bottom cover of the impregnator is opened. The rapid changes in temperature and pressure may cause some of the tobacco dust and smoke dust to freeze and remain in the liquid level probe hole, resulting in blockage of the temperature probe or the liquid level hole. When the next batch is produced, the temperature probe will not be able to contact the carbon dioxide liquid, and the inaccurate temperature measurement will cause the liquid level to be judged incorrectly, thereby generating the "V23 liquid addition weight and liquid level switch comparison alarm" to shut down the equipment and cause production interruption. At the same time, it is necessary to manually remove the temperature probe and manually spray the liquid level hole, which seriously affects production efficiency and also poses the risk of production interruption. Summary of the invention

[0005] The purpose of the present invention is to provide an immersion device liquid level probe blowing device to solve the problems existing in the prior art.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A blowing device for an impregnator liquid level probe comprises: an air inlet pipe, wherein three air outlet pipes are provided on the air outlet end side of the air inlet pipe, and the three air outlet pipes are respectively and correspondingly installed in the low, middle and high liquid level holes of the impregnator; a temperature detector, wherein the temperature detectors are respectively arranged in the air outlet pipes in the three liquid level holes; and an electromagnetic stop valve, wherein the electromagnetic stop valve is arranged on the air inlet pipe and is used to open or close the compressed air path of the air inlet pipe.

[0008] In some embodiments, a manual ball valve is also included, which is arranged at the end of the intake pipe and is used to open or close the compressed air circuit of the intake pipe.

[0009] In some embodiments, an air source processing component is also included, and the air source processing component is arranged on the air inlet pipe between the manual ball valve and the electromagnetic stop valve.

[0010] In some embodiments, a pressure detection switch is also included, and the pressure detection switch is arranged on the air inlet pipe between the electromagnetic stop valve and the air outlet pipe.

[0011] In some embodiments, each air outlet pipe further includes a right-angle seat valve, which is a normally closed type and pneumatically controlled. When compressed air is fed into the right-angle seat valve, the right-angle seat valve opens.

[0012] In some embodiments, a two-position three-way solenoid valve is also included. The two-position three-way solenoid valve is a normally closed type. One end of the two-position three-way solenoid valve is connected to compressed air, and the other end is connected to a right-angle seat valve.

[0013] Compared with the prior art, the present invention has the following beneficial effects: the present invention can be applied to the automatic blowing and cleaning of impurities in the liquid level hole and liquid level temperature probe of the impregnator of the 1140kg / h carbon dioxide expanded tobacco production line. The control method is scientific and reasonable, and the impregnation is carried out when there is no tobacco, no carbon dioxide liquid and no air pressure in the impregnator, which does not affect the production efficiency and product quality; secondly, the pipe diameter size and the compressed air pressure are reasonably selected and debugged, which can effectively complete the cleaning and blowing of impurities attached to the liquid level hole and temperature probe of the impregnator, and ensure smooth production. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the composition of an impregnator liquid level probe blowing device according to an embodiment of the present invention;

[0015] Illustration: 1-manual ball valve, 2-air source processing unit, 3-electromagnetic stop valve, 4-pressure detection switch, 5-inlet pipe, 6-right-angle seat valve, 7-two-position three-way solenoid valve, 8-DN10 seamless steel pipe, 9-temperature detector. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0017] On the contrary, the present application covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present application as defined by the claims. Further, in order to make the public have a better understanding of the present application, some specific details are described in detail in the detailed description of the present application below. Those skilled in the art can fully understand the present application without the description of these details.

[0018] The following will be combined Figure 1 The in-situ end cover opening and closing structure of the isostatic press main machine involved in the embodiment of the present application is described in detail. It should be noted that the following embodiments are only used to explain the present application and do not constitute a limitation on the present application.

[0019] In the embodiments of the present application, Figure 1 As shown, the impregnator liquid level probe blowing device may include: an air inlet pipe 5, wherein three air outlet pipes are provided on the air outlet end side of the air inlet pipe 5, and the three air outlet pipes are respectively and correspondingly installed in the low, middle and high liquid level holes of the impregnator; a temperature detector 9, wherein the temperature detectors 9 are respectively arranged in the air outlet pipes in the three liquid level holes; and an electromagnetic stop valve 3, wherein the electromagnetic stop valve 3 is arranged on the air inlet pipe 5, and is used to open or close the compressed air path of the air inlet pipe 5.

[0020] In this embodiment, the air inlet pipe 5 adopts a DN15 seamless steel pipe, and the air outlet pipe adopts a DN10 seamless steel pipe 8. Aiming at the problem that the temperature probe and the liquid level hole of the impregnator of the 1140kg / h carbon dioxide expanded tobacco production line are blocked, the liquid level determination failure will lead to equipment alarm shutdown, production interruption and high maintenance intensity, the present invention designs a set of liquid level probe blowing device, which is composed of pipes, electromagnetic stop valves 3, two-position three-way electromagnetic valves 7, right-angle seat valves 6 and pressure detection switches 4, etc., uses PLC for industrial automatic control, and uses compressed air to realize automatic blowing of the impregnator liquid level hole. The problem of blockage of the impregnator liquid level hole and temperature probe is solved, and the maintenance labor intensity is reduced.

[0021] Combined with the actual situation of the impregnator liquid level probe and liquid level hole of the 1140kg / h carbon dioxide expanded tobacco production line, the blowing device is designed as follows. It includes FESTO VZXF-L-M22C-MB-G12-130-M1-V4V4T-50-40 standard right-angle seat valve 6, DN15 seamless steel pipe, DN10 seamless steel pipe 8, FESTO VZWD-L-M22C-M-G18-40-V-1P4-8-R1 standard two-position three-way solenoid valve 7, ASCO 262 universal solenoid stop valve 3, pressure detection switch 4, manual ball valve 1, two-way gas source processing unit 2, temperature detector 9, adopting the structure of changing one main pipeline into three pipelines, and the electrical control method of solenoid valve and PLC, to realize the fixed-point automatic blowing of the impregnator liquid level hole.

[0022] In some embodiments, a manual ball valve 1 is also included, which is arranged at the end of the air inlet pipe 5 and is used to open or close the compressed air path of the air inlet pipe 5. An air source processing component 2 is also included, which is arranged on the air inlet pipe 5 between the manual ball valve 1 and the electromagnetic stop valve 3. A pressure detection switch 4 is also included, which is arranged on the air inlet pipe 5 between the electromagnetic stop valve 3 and the air outlet pipe. Each air outlet pipe also includes a right-angle seat valve 6, which is a normally closed type and is pneumatically controlled. When compressed air is fed to the right-angle seat valve 6, the right-angle seat valve 6 opens. A two-position three-way solenoid valve 7 is also included, which is a normally closed type. One end of the two-position three-way solenoid valve 7 is connected to compressed air, and the other end is connected to the right-angle seat valve 6.

[0023] The DN15 seamless steel pipe and the DN10 seamless steel pipe 8 can both withstand a pressure of at least 30 bar to prevent the pressure from flowing back into the pipeline after the impregnator is stamped, causing a safety accident; the manual ball valve 1 is connected to the DN15 seamless steel pipe and can be used in emergency situations such as failure of electronic components in the device and when maintenance of the pipelines and components of the injection device is required. The manual ball valve 1 is manually operated to control the intake and shutoff of the total compressed air to ensure production and equipment safety.

[0024] The rear end is connected to a double air source processing component 2, which can be used to reprocess the compressed air to remove oil and moisture, ensuring that dry and pure compressed air enters the impregnator for spraying to prevent affecting the quality of tobacco; the rear end is connected to an electromagnetic stop valve 3, and the electromagnetic stop valve 3 is connected to a PLC control signal. When spraying is not required, the electromagnetic stop valve 3 closes the compressed air path. When spraying is required, the electromagnetic stop valve 3 opens the compressed air for spraying, which can solve the problem of frequent manual operation of manual valves to control the on and off of compressed air and reduce manual labor intensity.

[0025] The rear end is connected to a pressure detection switch 4, which can detect the compressed air pressure in the pipeline. When the pressure is too high or too low, an alarm signal will be generated to remind manual maintenance; the rear end is connected to a right-angle seat valve 6, which is a normally closed type and is pneumatically controlled. When compressed air is fed to the right-angle seat valve 6, the right-angle seat valve 6 opens.

[0026] The rear end is connected to a two-position three-way solenoid valve 7, which is a normally closed type. One end of the solenoid valve is connected to compressed air, and the other end is connected to a right-angle seat valve 6. When the solenoid valve receives a PLC control signal, the solenoid valve opens, and compressed air enters the right-angle seat valve 6, thereby controlling the opening / closing of the right-angle seat valve 6, thereby realizing automatic opening / closing control of the compressed air in the pipeline; the rear end DN10 seamless steel pipe 8 is installed in the liquid level hole, and the temperature detector 9 is connected in the DN10 seamless steel pipe 8. When compressed air is sprayed, it can not only spray the liquid level hole, but also ensure full coverage of the temperature probe, thereby enhancing the spraying effect.

[0027] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An impregnator liquid level probe blowing device, characterized in that: include: An air inlet pipe, wherein three air outlet pipes are arranged on the air outlet end side of the air inlet pipe, and the three air outlet pipes are respectively and correspondingly installed in the low, middle and high liquid level holes of the immersion device; Temperature detectors, which are respectively arranged in the gas outlet pipes in the three liquid level holes; the temperature detectors are used to detect the temperature of the liquid carbon dioxide in the impregnator; An electromagnetic stop valve, which is arranged on the air intake pipe and is used to open or close the compressed air path of the air intake pipe; It also includes a manual ball valve, which is arranged at the end of the intake pipe and is used to open or close the compressed air circuit of the intake pipe; it also includes an air source processing component, which is arranged on the intake pipe between the manual ball valve and the electromagnetic stop valve; it also includes a pressure detection switch, which is arranged on the intake pipe between the electromagnetic stop valve and the outlet pipe; each outlet pipe also includes a right-angle seat valve, which is a normally closed type and is pneumatically controlled. When compressed air is fed to the right-angle seat valve, the right-angle seat valve opens; it also includes a two-position three-way solenoid valve, which is a normally closed type, one end of the two-position three-way solenoid valve is connected to compressed air, and the other end is connected to the right-angle seat valve.

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