TWI718558B - Liquid level sensor device with double-layer flexible tube and packaging structure thereof - Google Patents

Abstract

A liquid level sensor device with double-layer flexible tube and packaging structure thereof are disclosed. The device has an outer tube fixing member connected to a signal module and a protective hose connected to the outer tube fixing member. A double-layer flexible pipe has one end connected to the protective hose. The double-layer flexible pipe includes a flexible conductive outer tube and a fluorine-containing plastic inner tube which are disposed coaxially. The fluorine-containing plastic inner tube is made of flexible material, and the flexible conductive outer tube is made of conductive and flexible material to be a grounding. A sensing module is arranged in the fluorine-containing plastic inner tube. A magnetic floating element is combined on the outer side of the double-layer flexible tube, and a hanging piece is connected to the other end of the double-layer flexible tube. Thereby, infiltration of oil and gas can be prevented to cause damages. The packaging structure comprises a storage box and a reel, and the liquid level sensor device with the double-layer flexible tube is wound around the reel and placed in the storage box to facilitate storage and use.

Description

Liquid level sensing device with double-layer flexible tube and packaging structure thereof

The invention relates to a liquid level measuring device, in particular to a flexible liquid level sensing device.

When the liquid level sensing device is used in hazardous locations, it must be designed in accordance with explosion-proof specifications and must have an anti-corrosion coating. Under this premise, its design is based on Intrinsic Safety circuit design or metal rigid probe design Mainly. In addition, the design of rigid metal probes cannot adapt to the strong turbulence of the measurement environment and long-distance measurement due to the structural strength, resulting in a limited measurement range that does not meet the requirements of use.

In addition, the flexible material level sensing device uses a flexible engineering plastic tube or rubber tube as the outer tube of the sensing probe, so as to achieve the effects of folding and folding and reducing the storage volume and occupied space. Although the plastic tube has good air and water tightness, it is easy to accumulate static electricity due to its high impedance characteristics, which makes the plastic material unable to be used in potentially explosive environments, such as petroleum refining or chemical plants; also, rubber tubes Although it has conductivity and can be used in hazardous situations, the rubber material is porous and can only achieve partial water tightness, so it cannot be used in situations with steam.

Furthermore, when the flexible material level sensing device is to be used again after being rolled, there are often problems that it is not easy to move to a fixed point and it is not easy to pull out. In addition, the current flexible substance level sensing device is used in In petrochemical, oil refining, chemical and other fields, oil and gas will corrode and penetrate into the flexible pipe body, causing damage to internal circuit boards or sensing components, leading to increased failure rates.

In view of this, the inventor of the present invention focused on the above-mentioned prior art, especially concentrated research and the application of scientific theory, and tried to solve the above-mentioned problems, which became the goal of the present inventor's improvement.

One of the objectives of the present invention is to provide a liquid level sensing device with a double-layer flexible pipe to prevent oil and gas from penetrating into the flexible pipe body, and can be applied to the process characteristics of high-risk environments (steam, oil and gas, corrosion resistance, explosion-proof ) To ensure a long-distance measurement range and reduce the failure rate.

In order to achieve the above-mentioned purpose, the present invention is a liquid level sensing device with a double-layer flexible tube, which includes a signal module, an outer tube fixing member, a protective hose, a double-layer flexible tube, a sensing module, and a magnetic Floating elements and hanging parts. The outer tube fixing part is connected to the signal module; the protective hose is connected to the outer tube fixing part; one end of the double-layered flexible tube is connected to the protective hose, including a coaxially arranged flexible conductive outer tube and a fluorine-containing plastic inner tube, and a fluorine-containing plastic inner tube It is made of flexible material, and the flexible conductive outer tube is made of conductive flexible material and serves as a ground layer; the sensing module is set in the fluorine-containing plastic inner tube; the magnetic floating element is combined in the double layer The outside of the flexible tube; the hanger is connected to the other end of the double-layer flexible tube.

One objective of the present invention is to provide a packaging structure for a liquid level sensing device with a double-layer flexible tube to ensure the safety of the flexible substance liquid level sensing device when moving, and to increase the convenience of use .

In order to achieve the above objective, the present invention is a packaging structure of a liquid level sensing device with a double-layer flexible tube, which includes a storage box and a reel. The storage box includes a box body and a plurality of partitions arranged in the box body. The partitions separate the inside of the box body to form an accommodating space; the reel is placed in the accommodating space, The reel includes a hollow shaft and a pair of ring plates arranged on the opposite side of the hollow shaft. The outer peripheries of the pair of ring plates respectively protrude from the hollow shaft and form a winding space. The liquid level sensor has a double-layer flexible tube. The device is housed in the winding space by winding a double-layer flexible tube around a hollow shaft, and the outer tube fixing member is exposed outside the pair of ring plates.

Compared with the prior art, the double-layer flexible tube of the present invention includes a coaxially arranged flexible conductive outer tube and a fluorine-containing plastic inner tube, and the fluorine-containing plastic inner tube is made of flexible material, and the flexible conductive outer tube has The conductive flexible material is formed as a ground layer; therefore, the double-layer flexible tube of the present invention combines the good air-tightness and water-tightness of the plastic tube as the inner layer for protection, and is matched with the conductive rubber tube as the outer layer. The plastic tube is prevented from accumulating static electricity, so that the present invention can be used in high-risk manufacturing processes (such as full of steam, oil and gas, corrosion resistance, explosion-proof), measurement of non-standard tanks and other use environments. In addition, due to the flexibility of the double-layered flexible tube, it can be used for long-distance measurement in a tank with turbulent flow characteristics; in addition, since the flexible conductive outer tube is conductive and can be used for grounding, it accumulates The charge will vent along the flexible conductive outer tube without causing charge accumulation, so it can avoid explosion hazard and comply with explosion-proof regulations, thereby avoiding the penetration of oil and gas, ensuring the long-distance measurement range and reducing the failure rate. . Furthermore, the liquid level sensing device with a double-layer flexible tube of the present invention is wound on the reel and positioned in the storage box, which can increase the convenience of use. In addition, the double-layer flexible tube of the present invention The liquid level sensing device of the pipe is wound on the reel and positioned in the storage box, which can ensure the safety during movement and increase the convenience of use and long-distance transportation.

1: Liquid level sensing device with double-layer flexible tube

2: barrel trough

3: Storage

10: Outer tube fixings

15: Signal module

20: Protective hose

30: Double-layer flexible pipe

31: Flexible conductive outer tube

32: Fluoroplastic inner tube

35: hanging pendant

40: Sensing module

41: circuit board

42: sensing element

43: Magnetic floating element

50: Socket component

51: Connector cover

52: Connector seat

60: storage box

600: accommodating space

601: Annular Space

61: Box

611: Bottom Box

612: upper cover

613: positioning film

62: partition

70: reel

700: winding space

71: Hollow shaft

72: Ring plate

720: groove

FIG. 1 is a schematic diagram of the three-dimensional appearance of the flexible liquid level sensing device of the present invention.

Figure 2 is a cross-sectional view of the double-layer flexible tube of the present invention.

FIG. 3 is a schematic diagram of the packaging of the liquid level sensing device with a double-layer flexible tube according to the present invention.

4 is a cross-sectional view of the liquid level sensing device with a double-layer flexible tube of the present invention after being rolled up.

Fig. 5 is a schematic diagram of the liquid level sensing device with a double-layer flexible tube of the present invention after being wound.

Fig. 6 is a schematic diagram of the installation of the liquid level sensing device with a double-layer flexible tube of the present invention after being wound.

The detailed description and technical content of the present invention are described below in conjunction with the drawings. However, the drawings are only provided for reference and explanation, and are not used to limit the present invention.

Please refer to FIG. 1 and FIG. 2, which are respectively a three-dimensional appearance schematic diagram and a cross-sectional view of a double-layer flexible tube of the flexible liquid level sensing device of the present invention. The liquid level sensing device 1 with a double-layer flexible pipe of the present invention includes an outer pipe fixing member 10, a protective hose 20, a double-layer flexible pipe 30, a sensing module 40 and a hanging member 35. The outer tube fixing member 10, the protective hose 20, the double-layer flexible tube 30, and the hanger 35 are connected in sequence, and the sensing module 40 is combined with the protective hose 20 and the double-layer Within the flexible tube 30, a liquid level sensing device 1 with a double-layer flexible tube is formed accordingly. The structure of the flexible liquid level sensing device 1 is described in more detail as follows.

The outer tube fixing member 10 is used to connect a signal module 15 (see also FIG. 6), and the signal module 15 is provided with components such as a control circuit to perform related operations.

The protective hose 20 is connected to the outer tube fixing member 10. In this embodiment, a part of the sensing module 40 is located in the protective hose 20. Since the protective hose 20 is not easy to bend compared to the double-layer flexible tube 30, the arrangement of the protective hose 20 It can protect the sensing module 40 inside, so that the sensing module 40 is not Caused by bending and concave folding and damage. Preferably, the protective hose 20 is made of a strong acid-base resistant plastic tube or other suitable materials.

One end of the double-layer flexible tube 30 is connected to the protective hose 20, and the other end is connected to the hanger 35. In addition, the double-layer flexible tube 30 includes a flexible conductive outer tube 31 and a fluorine-containing plastic inner tube 32 that are coaxially arranged, and most of the sensing module 40 is arranged in the fluorine-containing plastic inner tube 32. The fluorine-containing plastic inner tube 32 is made of a flexible material, and the flexible conductive outer tube 31 is made of a conductive flexible material and is a ground layer.

It should be noted that the material of the fluorine-containing plastic inner tube 32 is mainly fluorine-containing (fluororesin) plastic. The fluorine-containing plastic may be polytetrafluoroethylene (PTFE), polytrifluorochloroethylene (PCTFE), Polyvinylidene fluoride (PVDF), ethylene-tetrafluoroethylene copolymer (ETFE), ethylene-chlorotrifluoroethylene copolymer (ECTFE), polyvinyl fluoride (PVF), tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer (Commonly known as fusible polytetrafluoroethylene, PFA), tetrafluoroethylene-hexafluoropropylene copolymer (commonly known as fluoroplastic 46, FEP), tetrafluoroethylene-hexafluoropropylene-perfluoroalkyl vinyl ether copolymer, etc. Among the materials, polytetrafluoroethylene (PTFE) is most commonly used.

In addition, the flexible conductive outer tube 31 is a flexible metal woven mesh, or the material of the flexible conductive outer tube 31 can be set to be rubber mixed with conductive graphite, a polymer material containing conductive particles, or conventional engineering plastics. (Such as Peek, NBR, Telfon) etc.

Specifically, most of the sensing module 40 is disposed in the fluorine-containing plastic inner tube 32. The material of the fluorine-containing plastic inner tube 32 is a high-molecular material with corrosion resistance and strong acid and alkali resistance, or various conventional acid and alkali-resistant high molecular materials. It should be noted that the material of the fluorine-containing plastic inner tube 32 is insulating but not conductive.

Furthermore, the sensing module 40 is disposed in the fluorine-containing plastic inner tube 32, and the sensing module 40 includes a circuit board 41 and a plurality of sensing elements 42 distributed thereon.

In this embodiment, the flexible liquid level sensing device 1 further includes a socket assembly 50 arranged on the protective hose 20. The socket assembly 50 includes a joint cover 51 and a joint seat 52 assembled with each other. In actual use, the joint cover 51 and the joint seat 52 can be respectively clamped on two sides of the groove wall of a storage tank, thereby fixing the flexible liquid level sensing device 1 in the storage tank for measurement.

In addition, it should be noted that because the double-layer flexible tube 30 of the flexible liquid level sensing device 1 of the present invention is flexible, it can be used for long-distance measurement in a storage tank with turbulent flow characteristics; In addition, since the flexible conductive outer tube 31 of the double-layered flexible tube 30 is conductive and can be used for grounding, the accumulated charge will be discharged along the flexible conductive outer tube 31 without causing charge accumulation, so it can be avoided. Explosion hazard and compliance with explosion-proof regulations.

Please also refer to FIGS. 3 and 4, which are a schematic diagram of the packaging and a cross-sectional view of the liquid level sensing device with a double-layer flexible tube according to the present invention. As shown in FIG. 3, the packaging structure of the liquid level sensing device with a double-layer flexible tube of the present invention includes a storage box 60 and a reel 70. The liquid level sensing device 1 with a double-layer flexible tube of the present invention is wound on the reel 70 and then placed in the storage box 60. The packaging structure of the flexible liquid level sensing device 1 is described in more detail as follows.

The storage box 60 includes a box body 61 and a plurality of partitions 62 disposed in the box body 61. The partitions 62 separate the inside of the box body 61 to form an accommodating space 600. In this embodiment, the box body 61 includes a bottom box 611 and an upper cover 612; the partitions 62 are arranged in the bottom box 611, and the upper cover 612 covers the box body 61 to cover the accommodating space 600. Preferably, the box body 61 has a rectangular shape, the partitions 62 are framed around the four corners of the box 61, and the partitions 62 can be used as a shock-proof structure to absorb unexpected vibrations. Or fall to protect the liquid level sensing device 1 of the double-layer flexible tube.

Furthermore, the reel 70 is placed in the accommodating space 600. The reel 70 includes a hollow shaft 71 and a pair of ring plates 72 arranged on opposite sides of the hollow shaft 71. The outer peripheries of the pair of ring plates 72 respectively protrude from the hollow shaft 71 and form a winding space 700, The liquid level sensing device 1 with a double-layer flexible tube is stored in the winding space 700 by wrapping the double-layer flexible tube 30 around the hollow shaft 71, and the outer tube fixing member 30 is exposed on the pair of rings. Outside the board 72.

Preferably, at least one of the pair of ring plates 72 is provided with at least one groove 720 on the outer edge surface; in addition, the outer tube fixing member 10 can also be positioned in the groove 720 to ensure that it moves Will not cause damage due to shaking and moving.

In this embodiment, the box body 61 is formed with a plurality of positioning pieces 613 in the accommodating space 600, and the positioning pieces 613 are positioned in the middle of the accommodating space 600 to position the hollow shaft 71; An annular space 601 is enclosed between the partition 62 and the positioning pieces 613 to accommodate the pair of annular plates 72.

Please continue to refer to FIG. 5, which is a schematic diagram of the liquid level sensing device with a double-layer flexible tube of the present invention after being wound. As shown in the figure, the liquid level sensing device 1 with a double-layer flexible tube of the present invention is wound on the reel 70. When using, first take out the reel 70 from the storage box 60, and then the user can pass the arm through the hollow shaft 71 of the reel 70, or put the hollow shaft 71 on the shoulder of the user, Therefore, it is convenient to carry the liquid level sensing device 1 with a double-layer flexible tube and move it to the measuring place.

Please refer to FIG. 6, which is a schematic diagram of the installation of the liquid level sensing device with a double-layer flexible tube according to the present invention. The liquid level sensing device 1 with a double-layer flexible tube of the present invention can measure the liquid level of the storage 3 in a tank 2. During installation, first put the hanging member 35 and the load 4 hanging on it into the barrel 2 and then rotate the hollow shaft 71 in FIG. 5 so that the double-layered flexible tube 30 can follow the The hanger 35 slowly sinks into the tank 2, and finally the joint cover 51 and the joint seat 52 are respectively clamped on the two sides of the tank wall of the tank 2 to be fixed by the socket assembly 50, and then the measurement is carried out. Test job.

In actual use, the outer tube fixing member 10 is connected to a signal module 15. In addition, the outer side of the double-layer flexible tube 30 is combined with a magnetic floating element 43. In addition, the flexible liquid level sensing device 1 transmits a signal to the signal module 15 through the resistance change between the sensing element 42 and the magnetic floating element 43. It should be noted that the aforementioned magnetic floating element 43 floats with the storage 3, and can be set as a coil, a magnetic spring, or a Hall (HALL) element, etc., or the magnetic floating element 43 can also be set with Fully enclosed impermeable floating ball of magnetic material.

The above descriptions are only preferred embodiments of the present invention, and are not intended to determine the patent scope of the present invention. Other equivalent changes using the patent spirit of the present invention should all belong to the patent scope of the present invention.

1: Liquid level sensing device with double-layer flexible tube

10: Outer tube fixings

20: Protective hose

30: Double-layer flexible pipe

50: Socket component

60: storage box

600: accommodating space

601: Annular Space

61: Box

611: Bottom Box

612: upper cover

613: positioning film

62: partition

70: reel

700: winding space

71: Hollow shaft

72: Ring plate

720: groove

Claims (10)

A liquid level sensing device with a double-layer flexible tube, comprising: a signal module; as a signal processing and output interface; an outer tube fixing part mechanically connected to the signal module; a protective hose mechanically connected to the outer tube Pipe fixing piece; a double-layered flexible tube, one end of which is mechanically connected to the protective hose, the double-layered flexible tube includes a flexible conductive outer tube and a fluorine-containing plastic inner tube arranged coaxially, the fluorine-containing plastic inner tube It is made of flexible material, the flexible conductive outer tube is made of conductive flexible material and is a ground layer; the ground layer is electrically connected to the signal modules listed above; a sensing module, Is arranged in the fluorine-containing plastic inner tube; electrically connected with the signal module listed above; a magnetic floating body element is combined on the outside of the double-layer flexible tube, and the magnetic floating body element changes the sense when it moves The detection resistance value of the measuring module; and a hanger, which is mechanically connected to the other end of the double-layer flexible tube. The liquid level sensing device with a double-layer flex tube as described in claim 1, which further includes a socket assembly arranged on the protective hose, and the socket assembly includes one that can be assembled or detached from each other. Connector cover and a connector seat. The liquid level sensing device with a double-layer flexible tube according to claim 1, wherein the material of the fluorine-containing plastic inner tube is a high-molecular material with corrosion resistance and strong acid and alkali resistance. The liquid level sensing device with a double-layer flexible tube according to claim 3, wherein the material of the fluorine-containing plastic inner tube is not conductive, and the material of the fluorine-containing plastic inner tube is made of fluororesin plastic Mainly, fluorine-containing plastics are polytetrafluoroethylene (PTFE), polychlorotrifluoroethylene Polyethylene (PCTFE), polyvinylidene fluoride (PVDF), ethylene-tetrafluoroethylene copolymer (ETFE), ethylene-chlorotrifluoroethylene copolymer (ECTFE), polyvinyl fluoride (PVF), tetrafluoroethylene-perfluoroalkane Base vinyl ether copolymer, tetrafluoroethylene-hexafluoropropylene copolymer or tetrafluoroethylene-hexafluoropropylene-perfluoroalkyl vinyl ether copolymer. The liquid level sensing device with a double-layered flexible tube according to claim 1, wherein the flexible conductive outer tube is a flexible metal braided mesh. The liquid level sensing device with a double-layer flexible tube according to claim 1, wherein the material of the flexible conductive outer tube is rubber mixed with conductive graphite or a polymer material containing conductive particles. A packaging structure for accommodating a liquid level sensing device with a double-layer flex tube as claimed in claim 1, comprising: a storage box including a box body and a plurality of partitions arranged in the box, the partitions An accommodating space is formed by separating the inside of the box body; and a reel is placed in the accommodating space, the reel includes a hollow shaft and a pair of ring plates arranged on opposite sides of the hollow shaft, The outer peripheries of the pair of ring plates respectively protrude from the hollow shaft and form a winding space, and the liquid level sensing device with a double-layered flexible tube is accommodated by wrapping the double-layered flexible tube around the hollow shaft. In the winding space, the outer tube fixing member is exposed outside the pair of ring plates. The packaging structure of a liquid level sensing device with a double-layer flexible tube according to claim 7, wherein the box body is formed with a plurality of positioning pieces in the accommodating space, and the positioning pieces are located in the accommodating space The hollow shaft is positioned in the middle, and an annular space is enclosed between the partition plates and the positioning pieces to accommodate the pair of ring plates. According to claim 7 of the packaging structure of a liquid level sensing device with a double-layer flexible tube, the box system has a rectangular shape, and the partitions are framed at four corners of the box body. According to claim 7 of the packaging structure of a liquid level sensing device with a double-layer flexible tube, at least one of the pair of ring plates is provided with at least one groove on the outer edge surface.

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