Liquid level indicator cavity outside float chamber

Abstract

The invention relates to a liquid level indicator cavity outside a float chamber. The liquid level indicator cavity comprises a main body part and a cover plate part, the main body part comprises a main body groove, and an opening of the main body groove is covered and sealed by the cover plate part; the cover plate part comprises a transparent panel and a frame which are fixedly connected; the cover plate part completely covers and seals the opening of the main body groove; the transparent panel comprises N panel sections, the frame comprises frame long edges and frame transverse edges and defines N windows, and the N panel sections correspond to the N windows respectively and are fixedly connected and sealed with the corresponding frame transverse edges and frame long edges. The sectional type interface structure is adopted, the problems of manufacturing, transportation and installation of the indicator cavity of the wide-range liquid level meter are solved, and production and application of the wide-range liquid level indicator cavity and the corresponding on-site indication type liquid level meter are effectively achieved.

Description

Technical Field

[0001] The invention relates to a liquid level indicator of a liquid level meter, in particular to a liquid level indicator cavity outside a float chamber. Background Art

[0002] Magnetic float level gauge or magnetic flap level gauge, in which the magnetic flap or magnetic flip column serves as the display and indication component, requires a protective housing fixed outside the float chamber, which is usually called the "indicator cavity" or "magnetic flap chamber".

[0003] In the Chinese patent "Float-type liquid level gauge with cursor display" (publication number CN105277258A), the cursor serves as a display and indication component and moves synchronously with the ferromagnetic float; the cursor generally requires the protective shell, i.e., the "indicator cavity".

[0004] The liquid level indicator cavity of the present invention is the protective shell of the liquid level meter display and indicating components.

[0005] The transparent panel of the existing liquid level indicator cavity is made of glass or transparent plastic. When the range of the liquid level gauge is large, the liquid level indicator cavity and its upper panel usually have the following problems, including: (1) When the range of the level gauge is large, the indicator cavity is also correspondingly long. During the lifting process, the deflection is also large, and the panel of the indicator cavity is easily broken and damaged, which leads to product failure.

[0006] (2) When the range of the level meter is large, the length of the panel of the indicator cavity needs to match the range. For example, if the range of the level meter is 18 meters, an 18-meter-long panel is required. Such a long panel is difficult to manufacture or the manufacturing cost is very high. Moreover, even if it is manufactured, it is very easy to break during installation and transportation, or the corresponding cost is greatly increased.

[0007] (3) It is easy to be damaged during use, which increases the corresponding cost: For example, glass or transparent plastic is usually used to make the liquid level indicator cavity panel. Among them, the linear expansion coefficient of glass is much smaller than that of metal, while the linear expansion coefficient of transparent plastic is much larger than that of metal; when such a glass or transparent plastic panel is bonded to the metal frame of the cavity, the expansion difference between the panel and the cavity is large, resulting in damage to the panel. Summary of the Invention

[0008] In view of the above problems existing in the prior art, the present invention discloses a liquid level indicator cavity outside the float chamber, which is used to solve the problem that the liquid level indicator cavity outside the float chamber is difficult to manufacture when the liquid level measurement range is large, and is easily damaged during lifting, transportation, installation and use.

[0009] The technical solution of the present invention is achieved as follows: A liquid level indicator cavity outside a float chamber comprises a main body and a cover plate; the main body comprises a main body groove, and an opening of the main body groove is covered and sealed by the cover plate; The cover portion includes a transparent panel and a frame that are fixedly connected; the cover portion completely covers and seals the opening of the main body groove; wherein: The transparent panel includes N panel segments (N≧2), which are usually made of transparent glass or transparent plastic; The frame includes a long side and a transverse side; the long side extends along the length of the main groove and is connected to the open edge of the main groove to form the outer edge of the main groove; the transverse sides are perpendicular to the long sides and are in the same plane, and are provided in pairs along the length of the main groove, with a total of N+1 sides; two adjacent transverse sides and the corresponding portion of the long side of the frame together enclose N windows; The N panel segments correspond to the N window openings, respectively. Each panel segment is larger than the diameter of the corresponding window opening and is fixedly connected and sealed to the corresponding horizontal and long edges of the frame. Taking into account the different linear expansion coefficients of the panel segments and the frame, the size difference between each panel segment and its corresponding window opening is greater than the expansion difference between the panel segment and the corresponding frame. Furthermore, the distance between two adjacent panel segments should be greater than the expansion difference between the corresponding frame and the panel segment.

[0010] Specifically, each panel segment is circumferentially bonded and sealed to the frame of the corresponding window.

[0011] Or, specifically, a sealing ring is sandwiched around each panel segment and the frame of the corresponding window, and the panel segment, the sealing ring and the corresponding frame are at least partially fixedly connected by fasteners.

[0012] Or, specifically, a sealing ring is sandwiched around each panel segment and the frame of the corresponding window, and the panel segment, the sealing ring and the corresponding frame are bonded and sealed respectively; and further, the three are bonded and connected at the same time using fasteners.

[0013] Specifically, the sealing ring is made of rubber; In order to increase the service life of the liquid level gauge, rubber with a long aging life is used, and the material of the rubber is EPDM.

[0014] The present invention addresses the problem of large expansion differences between the panel and the frame of a large-scale liquid level indicator device due to different materials. The transparent panel is divided into multiple panel segments. Correspondingly, the frame also uses the horizontal edges of the frame to separate multiple windows corresponding to the panel segments. The panel and the frame of the window are then connected and sealed to form a sealed cover.

[0015] Taking an 18-meter-long indicator cavity as an example, the conventional panel is typically a single solid plate made of PE with a linear expansion coefficient of 64. The frame surrounding the panel is made of 304 steel with a linear expansion coefficient of 16. Assuming an ambient temperature difference of ±50°C, calculations show that the differential expansion between the two reaches ±34.2mm. If the panel is fixed in the center and expands and contracts toward the ends, the relative differential expansion also reaches 17.1mm. If the panel is bonded to a rectangular outer frame, such a large differential expansion could cause the two to separate or damage the panel. If the panel and the rectangular outer frame are fixed with fasteners, one of the two must have an elongated hole, which increases manufacturing costs. When using the multi-segment panel structure described in the present invention, for example, a panel length of 1 meter, fixed in the center, calculations show that the relative differential expansion between the ends of each panel segment is less than 1mm. The adhesive used to bond the panel segment to the corresponding window frame should have an elongation at break greater than 500%. The two will not break or separate when the temperature fluctuates within ±50°C. Since the relative expansion difference is less than 1mm, when fasteners are used for fixing, the diameter of the bolt hole can be increased by 2mm to meet the requirements.

[0016] It can be seen that the present invention adopts a segmented interface structure, which effectively solves the manufacturing, transportation and installation problems of the indicator cavity of a large-scale liquid level gauge (for example, when it is as long as 18 meters), so that the production and application of a large-scale liquid level indicator cavity and the corresponding on-site indicating liquid level gauge can be effectively implemented, meeting market and production needs; it is not only conducive to improving production efficiency and reducing manufacturing costs, but also improves the reliability of the liquid level indicator. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be described in more detail below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 This is a front view of the main groove and frame of the liquid level indicator cavity described in Example 1 of the present invention; Figure 2 yes Figure 1 Left view of; Figure 3 yes Figure 1 AA cross-sectional view; Figure 4 This is a front view of the liquid level indicator cavity described in Example 1 of the present invention; Figure 5 yes Figure 4 EE cross-sectional view; Figure 6 yes Figure 4 BB cross-sectional view; Figure 7 This is a front view of a rectangular sealing ring fixed in sections on the frame of the liquid level indicator cavity described in Example 1 of the present invention; Figure 8 yes Figure 7 Left view of; Figure 9 yes Figure 7 CC cross-sectional view; Figure 10 This is a front view of a liquid level indicator cavity according to Example 1 of the present invention, with a rectangular sealing ring sandwiched between the panel section and the corresponding frame; Figure 11 yes Figure 10 GG cross-sectional view; Figure 12 yes Figure 10 DD cross-sectional view; Figure 13 This is a front view of the liquid level indicator cavity described in Example 2 of the present invention; Figure 14 yes Figure 13 II sectional view; Figure 15 yes Figure 13 FF cross-sectional view; Figure 16 This is a front view of the liquid level indicator cavity described in Example 3 of the present invention; Figure 17 yes Figure 16 JJ sectional view; Figure 18 yes Figure 16 A cross-sectional view of HH; in the figure: 1, 1'. Main body groove 2. Cover part 2-1. Panel section 2-20. Window 2-21. Long side of frame 2-22. Short side of frame 3. Guide rail 4. Guide rail bracket 5. Indicator plate 6. Float chamber 7. Sealing ring 8, 8'. Flange 9, 9'. Pipe connection 10. Fastener 11. Spherical float 11'. Magnetic float 12. Magnetic flap or magnetic flip column. DETAILED DESCRIPTION Example 1

[0019] The liquid level indicator cavity outside the float chamber is used in magnetic vernier level gauges, such as Figures 1 to 12 As shown, it includes a main body tank 1 and a cover plate portion 2 of the liquid level indicator cavity, and the opening of the main body tank 1 is covered and sealed by the cover plate portion 2. Figure 6As shown; the cover portion 2 includes a transparent panel and a frame; the transparent panel includes N panel segments 2-1, N≧2; the frame includes a frame long side 2-21 and a frame transverse side 2-22; the frame long side 2-21 extends along the length direction of the main body groove 1 and is fixedly connected to the open edge of the main body groove 1 to form the outer edge of the main body groove 1 turned outward, and the turning outward refers to the direction away from the central axis of the main body groove 1; the frame transverse sides 2-22 are N+1, and are arranged at a distance along the length direction of the main body groove 1; two adjacent frame transverse sides 2 -22 and the corresponding portion of the long side 2-21 of the frame together enclose N windows 2-20. The N panel segments 2-1 correspond to the N windows 2-20 respectively. The size of each panel segment 2-1 is larger than the diameter of the corresponding window 2-20 and is fixedly connected and sealed to the corresponding horizontal side 2-22 and long side 2-21 of the frame. Specifically, the size difference between each panel segment 2-1 and the corresponding window is sufficient to compensate for the expansion difference between the panel segment and the corresponding frame. At the same time, the distance between two adjacent panel segments is greater than the maximum expansion difference between the frame and the panel segment. The cover portion 2 is equivalent to a plate covering the opening of the main body groove 1 and is fixedly and tightly connected to the main body groove 1. N holes communicating with the main body groove are opened along the length of the plate, i.e., the windows 2-20. Each panel segment 2-1 corresponds to a window 2-20, and the size of the panel segment 2-1 can be made larger than the inner circumference size of the corresponding window 2-20, covering the window 2-20 and sealing and fixing it with the frame constituting the window 2-20.

[0020] Each panel segment 2-1 is circumferentially bonded and sealed to the frame of the corresponding window 2-20.

[0021] Furthermore, a sealing ring 7 having a suitable size and shape can be placed circumferentially between the panel segment 2-1 and the frame of the corresponding window 2-20; the panel segment 2-1, the sealing ring 7 and the corresponding long side 2-21 of the frame are fixedly connected by fasteners 10, such as Figure 12 Alternatively, the panel segments 2-1, the sealing rings 7 and the corresponding frames 2-21, 2-22 are bonded and sealed in pairs. In order to further ensure the fixed connection between the cover portion 2 and the main body tank 1, bonding and fasteners can be used at the same time.

[0022] The panel or panel segment is usually made of transparent glass or transparent plastic, and its shape is adapted to the opening shape of the liquid level indicator cavity, and is generally rectangular. The sealing ring 11 is made of rubber or EPDM, the latter of which has a longer aging life, thereby further ensuring and improving the service life of the corresponding liquid level gauge, and its shape is adapted to the corresponding frame and panel or panel segment.

[0023] In this embodiment, the display is performed by a magnetic cursor following the movement of the spherical float 11 in the float chamber 6 and indicating the liquid level through the indicator plate 5 fixed on the magnetic cursor. The magnetic cursor moves up and down along the guide rail 3. For details, refer to Chinese patent CN105277258A "Float-type liquid level gauge with cursor display". Example 2

[0024] On the basis of embodiment 1, this embodiment replaces the spherical float with a magnetic float 11' and is applied to a magnetic flap float level gauge, such as Figure 13-15 As shown, the liquid level is displayed by a magnetic flap or a magnetic flip column 12. Example 3

[0025] Different from the embodiment 2, the float chamber 6 in this embodiment is located outside the main body groove 1' of the liquid level indicator cavity. Figure 16-18 Specifically, the liquid level indicator cavity includes a main body groove 1' and a cover plate portion 2 of the liquid level indicator cavity. The opening of the main body groove 1' is covered and sealed by the rectangular cover plate portion 2. Figure 18 As shown; the cover portion 2 includes a transparent panel and a frame; the transparent panel includes N panel segments 2-1; the frame includes a frame long side 2-21 and a frame transverse side 2-22; the frame long side 2-21 extends along the length direction of the main body groove 1' and is fixedly connected to the open edge of the main body groove 1 to form the outer edge of the main body groove 1 turned outward; there are N+1 frame transverse sides 2-22, which are arranged at a certain distance along the length direction of the main body groove 1'; two adjacent frame transverse sides 2-22 and the corresponding part of the frame long side 2-21 together enclose N windows 2-20, and the N panel segments 2-1 respectively correspond to the N windows 2-20 and a sealing ring 7 is circumferentially sandwiched between the corresponding frame transverse sides 2-22 and the frame long side 2-21; the panel segment 2-1, the sealing ring 7 and the corresponding frame long side 2-21 are fixedly connected by fasteners 10, as shown Figures 16-18 Alternatively, a bonding and sealing method can be used simultaneously, that is, the panel segment 2-1, the sealing ring 7 and the corresponding frame 2-21, 2-22 are bonded and sealed in pairs. The dimensions of the panel segment 2-1 and the corresponding window 2-20 are the same as those described and required in the previous embodiment 1.

[0026] Obviously, the above embodiments can be combined in many ways, and the ones listed are only some of the embodiments of the present invention, not all of them. On this basis, any technical solution obtained by equivalent replacement or modification of the technical solution and inventive concept of the present invention by any person skilled in the art within the technical scope disclosed by the present invention without creative work should be included in the scope of protection of the present invention.

Claims

1. A liquid level indicator cavity outside a float chamber, comprising a main body and a cover plate; the main body comprising a main body tank (1), the cover plate (2) comprising a fixedly connected transparent panel and a frame; the opening of the main body tank (1) is covered and sealed by the cover plate (2); characterized in that: The transparent panel includes N panel segments (2-1); The frame comprises a long side (2-21) and a horizontal side (2-22); the long side (2-21) of the frame extends along the length direction of the main body groove (1) and is connected to the open edge of the main body groove (1) to form the outer edge of the main body groove (1); the horizontal side (2-22) of the frame is perpendicular to the long side (2-21) of the frame and is in the same plane, and a total of N+1 of the horizontal sides (2-22) are arranged at intervals along the length direction of the main body groove (1); two adjacent horizontal sides (2-22) of the frame and the corresponding part of the long side (2-21) of the frame together enclose N windows (2-20); The N panel segments (2-1) respectively correspond to the N windows (2-20); the size of each panel segment (2-1) is larger than the diameter of the corresponding window (2-20), and is fixedly connected and sealed to the corresponding frame horizontal side (2-22) and frame long side (2-21); Among them, N≧2.

2. The liquid level indicator cavity according to claim 1, characterized in that: Each panel segment (2-1) is circumferentially bonded and sealed to the frame of the corresponding window (2-20).

3. The liquid level indicator cavity according to claim 1, characterized in that: A sealing ring (7) is circumferentially sandwiched between each panel segment (2-1) and the frame of its corresponding window (2-20); the panel segment (2-1), the sealing ring (7) and the corresponding frame are at least partially fixedly connected by fasteners (10).

4. The liquid level indicator cavity according to claim 1, characterized in that: A sealing ring (7) is circumferentially sandwiched between each panel segment (2-1) and the frame of its corresponding window (2-20), and each of the panel segment (2-1), the sealing ring (7) and the corresponding frame is bonded and sealed.

5. The liquid level indicator cavity according to claim 4, characterized in that: The panel segment (2-1), the sealing ring (7) and the corresponding frame are at least partially fixedly connected by a fastener (10).

6. The liquid level indicator cavity according to any one of claims 3 to 5, characterized in that: The material of the sealing ring (7) is rubber.

7. The liquid level indicator cavity according to any one of claims 3 to 5, characterized in that: The material of the sealing ring (7) is EPDM.

8. The liquid level indicator chamber according to claim 1, wherein: The size difference between the panel segment (2-1) and the corresponding window (2-20) is greater than the expansion difference between the panel segment (2-1) and the corresponding frame; and the distance between two adjacent panel segments (2-1) should be greater than the expansion difference between the corresponding frame and the panel segment (2-1).

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