Steam dryness detection system

Abstract

The utility model discloses a steam dryness detection system which comprises a pipeline for supplying steam for forming a hollow filter stick, a vortex shedding flowmeter is inversely mounted in the middle of the pipeline, and a capacitor consisting of a capacitance sensor and a capacitance probe is mounted in the vortex shedding flowmeter. According to the scheme, condensed water is left at the bottom of the pipeline to form the water phase, the water phase serves as the negative electrode of the capacitor, the capacitance sensor and the capacitance probe serve as the positive electrode of the capacitor, the capacitance sensor measures the voltage, the liquid level height of the water phase can be calculated, and the steam dryness in the horizontal section in the pipeline can be obtained through the relation between the liquid level height of the water phase and the voltage. The steam dryness in the pipeline is monitored in real time, a basis is provided for follow-up adjustment, and follow-up steam dryness consistency regulation and control are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of steam dryness detection, and more specifically, to a steam dryness detection system applied in the production of cigarette filters. Background Art

[0002] During the forming process of the hollow filter rod of a cigarette filter, the general process is as follows: The cellulose acetate tow sprayed with triacetin is gathered by a tobacco tongue, then wrapped and pulled by a cloth belt and moves downstream along a tobacco gun. During the downstream movement, it is first rapidly heated by steam to increase the fluidity of triacetin, promoting the more uniform fusion of triacetin and cellulose acetate; then it is cooled and dried by the cold dry air in the next section, and finally a hollow filter rod is formed.

[0003] During the production of cigarette filters, good consistency of steam dryness can better ensure the forming and quality of cigarette filters. At present, however, the detection of steam dryness, especially the dryness detection applied in the production of cigarette filters, can only be carried out offline and intermittently, and cannot monitor and feedback in real time, making it difficult to adjust parameters in real time subsequently, and it is difficult to control the consistency of steam dryness. Summary of the Utility Model

[0004] The main purpose of the utility model is to provide a steam dryness detection system to improve the related technologies and solve the problems raised in the above background art.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A steam dryness detection system includes a pipeline for supplying steam to form a hollow filter rod. A vortex flowmeter is installed upside down in the middle of the pipeline. Inside the vortex flowmeter, there is a capacitor composed of a capacitance sensor and a capacitance probe; the condensed water remains at the bottom of the pipeline to form an aqueous phase, and the aqueous phase serves as the negative electrode of the capacitor, while the capacitance sensor and the capacitance probe serve as the positive electrode of the capacitor.

[0006] In one embodiment of the utility model, the vortex flowmeter includes two flanges connected to the pipeline, a meter body arranged between the two flanges, a vortex generator installed inside the meter body, fastening bolts installed on the lower side of the meter body, the capacitor composed of the capacitance sensor and the capacitance probe is installed above the fastening bolts, and a flow sensor is installed above the capacitor composed of the capacitance sensor and the capacitance probe.

[0007] In one embodiment of the utility model, a support rod is installed on the side of the meter body, and an electronic instrument capable of communicating with the outside is installed at the end of the support rod. The flow sensor, the capacitor composed of the capacitance sensor and the capacitance probe are respectively connected to the electronic instrument through cables.

[0008] In an embodiment of the present utility model, the bottom wall of the meter body is flush with the bottom wall of the pipeline.

[0009] In an embodiment of the present utility model, the capacitor formed by the capacitance sensor and the capacitance probe is adjacent to the bottom wall of the meter body.

[0010] In an embodiment of the present utility model, the centers of the flow sensor, the meter body, and the eddy current generator are coaxially arranged.

[0011] In summary, due to the adoption of the above technology, the beneficial effects of the present utility model are as follows:

[0012] In the present utility model, the condensed water remains at the bottom of the pipeline to form an aqueous phase. The aqueous phase serves as the negative electrode of the capacitor, and the capacitance sensor and the capacitance probe serve as the positive electrode of the capacitor. The capacitance sensor measures the voltage, and then the liquid level height of the aqueous phase can be calculated. By using the relationship between the liquid level height of the aqueous phase and the voltage, the steam dryness in the horizontal section of the pipeline can be obtained, and the steam dryness in the pipeline can be monitored in real time, providing a basis for subsequent adjustments and facilitating the regulation of the consistency of the steam dryness. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic front sectional view of the present utility model;

[0014] Figure 2 is a schematic side sectional view of a partial structure of the capacitance probe of the present utility model.

[0015] In the figure: 1, pipeline; 2, vortex flowmeter; 21, flange; 22, meter body; 23, eddy current generator; 24, fastening bolt; 25, flow sensor; 26, support rod; 27, electronic instrument; 3, capacitance probe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] In order to make the purposes, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present utility model. Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the present utility model to be protected, but merely represents selected embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present utility model.

[0017] In the description of the present utility model, it should be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings. These are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0018] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "connection", "fixation" and other terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to the specific situation of the specification.

[0019] Embodiment 1

[0020] Please refer to Figure 1 - Figure 2 , the present utility model provides a steam dryness detection system, including a pipe 1 for supplying steam to the formation of hollow filter rods. A vortex flowmeter 2 is installed upside down in the middle of the pipe 1. Inside the vortex flowmeter 2, there is a capacitor composed of a capacitance sensor and a capacitance probe 3; the condensed water remains at the bottom of the pipe 1 to form an aqueous phase. The aqueous phase serves as the negative electrode of the capacitor, and the capacitance sensor and the capacitance probe 3 serve as the positive electrode of the capacitor. The capacitance sensor measures the voltage and calculates using Formula 1:

[0021]

[0022] In Formula 1: is the steam dryness; A is the cross-sectional area of the pipe, m 2 ; A Y is the cross-sectional area occupied by the liquid phase in the flow-through pipe, m 2 ; Formula 1 is derived from the following formula:

[0023] The relational expression between the liquid level of the aqueous phase and the voltage, and the capacitance value is as shown in Formula 2:

[0024]

[0025] After Formula 2 is deformed, the contact area is:

[0026]

[0027] In Formulas 2 and 3: ∈ is the dielectric constant of the insulating layer, F / m; d is the thickness of the insulating layer of the capacitance probe, m; S is the contact area, m 2 .

[0028] The contact area between water and the capacitance probe is shown in Formula 4:

[0029]

[0030] In Formula 4, r is the radius of the capacitance sensor probe, m; H = R - (rh) Formula 5;

[0031] In formula 5, H is the liquid level height, m; R is the inner diameter of the pipe, m; h is the submerged height of the capacitance sensor, m; h can be obtained by combining formula 4 and formula 5, so the cross-sectional area of the pipe occupied by the liquid phase is A L for:

[0032]

[0033] Combined with the content of formula 1, the steam dryness can be obtained.

[0034] The vortex flowmeter 2 includes two flanges 21 connected to the pipeline 1, a meter body 22 arranged between the two flanges 21, a vortex generator 23 installed inside the meter body 22, a fastening bolt 24 installed on the lower side of the meter body 22, a capacitor composed of a capacitance sensor and a capacitance probe 3 installed on the upper part of the fastening bolt 24, and a flow sensor 25 installed on the upper part of the capacitor composed of the capacitance sensor and the capacitance probe 3. The flow sensor 25 can be used to measure the flow rate. The capacitor composed of the capacitance sensor and the capacitance probe 3 is integrated as a whole in the vortex flowmeter 2, which can reduce the number of openings at other positions in the pipeline 1.

[0035] A support rod 26 is installed on the side of the meter body 22, and an electronic meter 27 that can communicate with the outside is installed at the end of the support rod 26. The capacitor composed of the flow sensor 25, the capacitance sensor and the capacitance probe 3 is connected to the electronic meter 27 through cables, which facilitates electrical connection and communication with the outside.

[0036] In order to achieve good measurement results, the bottom wall of the meter body 22 is flush with the bottom wall of the pipeline 1, the capacitor formed by the capacitance sensor and the capacitance probe 3 is adjacent to the bottom wall of the meter body 22, and the center of the flow sensor 25, the center of the meter body 22 and the center of the vortex generator 23 are coaxially arranged.

[0037] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

[0038] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent in such process, method, article or device.

Claims

1. A steam dryness detection system, including a pipe (1) for supplying steam to the formation of hollow filter rods, characterized in that, A vortex flowmeter (2) is installed upside down in the middle of the pipeline (1). A capacitor composed of a capacitance sensor and a capacitance probe (3) is installed inside the vortex flowmeter (2); the condensed water remains at the bottom of the pipeline (1) to form an aqueous phase, and the aqueous phase serves as the negative electrode of the capacitor, while the capacitance sensor and the capacitance probe (3) serve as the positive electrode of the capacitor.

2. The steam dryness detection system according to claim 1, wherein The vortex flowmeter (2) includes two flanges (21) connected to the pipeline (1), a meter body (22) disposed between the two flanges (21), a vortex generator (23) installed inside the meter body (22), fastening bolts (24) installed on the lower side of the meter body (22), the capacitor composed of the capacitance sensor and the capacitance probe (3) is installed on the upper part of the fastening bolts (24), and a flow sensor (25) is installed on the upper part of the capacitor composed of the capacitance sensor and the capacitance probe (3).

3. The steam quality detection system according to claim 2, wherein, A support rod (26) is installed on the side of the meter body (22), and an electronic instrument (27) capable of communicating with the outside is installed at the end of the support rod (26). The capacitor composed of the flow sensor (25), the capacitance sensor and the capacitance probe (3) is connected to the electronic instrument (27) through cables respectively.

4. A steam dryness detection system according to claim 2 or 3, characterized in that, The bottom wall of the meter body (22) is flush with the bottom wall of the pipeline (1).

5. The steam dryness detection system according to claim 4, wherein The capacitor composed of the capacitance sensor and the capacitance probe (3) is adjacent to the bottom wall of the meter body (22).

6. The steam quality detection system according to claim 4, wherein The centers of the flow sensor (25), the meter body (22) and the vortex generator (23) are coaxially arranged.

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