WO2013104323A1 - 液位指示器及采用该液位指示器的容器 - Google Patents

液位指示器及采用该液位指示器的容器 Download PDF

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Publication number
WO2013104323A1
WO2013104323A1 PCT/CN2013/070321 CN2013070321W WO2013104323A1 WO 2013104323 A1 WO2013104323 A1 WO 2013104323A1 CN 2013070321 W CN2013070321 W CN 2013070321W WO 2013104323 A1 WO2013104323 A1 WO 2013104323A1
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WO
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Prior art keywords
liquid level
level indicator
container
pendulum
indicating
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PCT/CN2013/070321
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English (en)
French (fr)
Inventor
简园力
廖清新
Original Assignee
上海鸿润科技有限公司
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Publication of WO2013104323A1 publication Critical patent/WO2013104323A1/zh

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Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/02Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by gauge glasses or other apparatus involving a window or transparent tube for directly observing the level to be measured or the level of a liquid column in free communication with the main body of the liquid
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/003Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm with a probe suspended by rotatable arms
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/14Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measurement of pressure
    • G01F23/16Indicating, recording, or alarm devices being actuated by mechanical or fluid means, e.g. using gas, mercury, or a diaphragm as transmitting element, or by a column of liquid
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/30Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats
    • G01F23/32Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats using rotatable arms or other pivotable transmission elements

Definitions

  • the present invention relates to a liquid transport container, and in particular to an indication of the liquid level in the container. Background technique
  • the container It is important to maintain the integrity of the container in order to prevent the ingress or spillage of contaminants during the transportation of food, medicine, chemicals and other items. Especially when transporting a large amount of liquid, it is more desirable that the container be hermetic or have a cover that can be closed. Moreover, these liquids tend to be contained in a liner bag or an impermeable liner. This results in the inability to form a liquid level communication mechanism from the side wall of the container, which means that it is impossible to observe the liquid level of the liquid in the container by the conventional method.
  • the liquid level of the liquid that is, the volume (or weight) is very important data in the process of shop filling, warehouse storage, and factory inspection. Therefore, it is required to find a way to detect the liquid level of the liquid contained in the inner bag or the liner in the closed container.
  • the most traditional of the known methods is to design a transparent window on the side wall through which the height of the liquid level in the container is observed. Although this method is low in cost, the internal light is dimmed due to the tightness of the container, and the size of the transparent window cannot be made too large to affect the structural strength of the side wall, so the actual indication effect is not ideal.
  • a row of vertical pressure sensors are mounted on the inner surface of the side wall of the container, on the outer surface of the side wall.
  • a corresponding LED light 1001 is provided at a corresponding position on the 1000.
  • An object of the present invention is to provide a liquid level indicator which has good indication effect, low cost, convenient installation, high reliability and convenient use.
  • the present invention provides a liquid level indicator for indicating a liquid level in a container, the container including a bottom portion and a side wall, wherein the liquid level indicator is mounted on the side wall, wherein
  • the liquid level indicator includes:
  • the indicating device when the mechanical driving device is actuated, drives the indicating device such that the indicating device is within a visible range to indicate a liquid level in the container.
  • the mechanical drive device includes a pendulum, a pin, the indicating device is disposed on one end of the pendulum, and the pendulum is rotatably mounted on the pin, wherein:
  • the indicating device In the free state, the indicating device is outside the visible range
  • the indicating device is within the visible range when the pendulum is swung by the pressure of the liquid in the container.
  • the mechanical driving device includes a casing and a link mechanism
  • the indicating device is an indicating block
  • the link mechanism and the indicating block are installed in the casing, when When the linkage is subjected to the pressure of the liquid in the container, the indicator block is actuated such that the indicator block is within the visible range.
  • the liquid level indicator further includes a cover, the cover is a single piece composed of a housing, a pin, a transparent window, and an elastic arm, and the pendulum is rotatably mounted on the On the pin of the casing.
  • the level indicator further includes a tension spring that connects the pendulum and the casing to provide a restoring force to restore the pendulum.
  • the casing is an integral part of a casing, a pin, a transparent window and a resilient arm, and the casing is provided with a sliding groove, and the indicating block slides in the sliding groove.
  • the link mechanism is composed of a slide bar, a connecting rod, and a flexible wire, and the sliding bar is in contact with the connecting rod, and the connecting rod is connected to the indicating block through the flexible wire.
  • the sliding rod is subjected to the liquid side pressure in the container, the indicating block is driven by the flexible wire in the sliding groove Swipe down.
  • the housing is further provided with a stop for limiting the range of motion of the pendulum.
  • the outer side of the transparent window is a flat surface, and the inner side is a concave surface.
  • the present invention also provides a container using the above liquid level indicator, on which a plurality of said liquid level indicators are disposed in the height direction.
  • the liquid level indicator of the present invention can drive the indicator surface or the indicator block to move when subjected to the side pressure of the liner or the inner bag containing the liquid in the closed container, and the operator can directly observe the liquid level through the transparent window. height.
  • pressures such as less than 0.5 Newtons
  • the level indicator of the present invention has a higher sensitivity.
  • a pure mechanical structure is adopted, and the structure is simple, so that the reliability is high, the cost is low, and the installation is convenient.
  • FIG. 1 is a schematic structural view of a liquid level indicator of the prior art
  • Figure 2 is a perspective view of a first embodiment of the liquid level indicator of the present invention
  • Figure 3 is a front elevational view of the pendulum of the level indicator of Figure 2;
  • Figure 4 is a perspective view of the outer casing of the liquid level indicator of Figure 2;
  • Figure 5 is a schematic view showing the mounting position and mounting direction of the liquid level indicator on the tote box of Figure 2;
  • Figure 6 is a cross-sectional view of the liquid level indicator of Figure 2 showing the free state installed in the side wall of the container.
  • Figure 7 is a schematic view of the liquid level indicator installed in the side wall of the container;
  • Figure 8 is a schematic view showing the mounting direction of the liquid level indicator on the tote box in another embodiment
  • Figure 9 is a cross-sectional view showing the structure of the liquid level indicator mounted in the side wall of the container corresponding to the mounting direction of Figure 8;
  • FIG. 10 is a schematic illustration of another embodiment of the level indicator of the present invention.
  • Figure 11 is a schematic view of another embodiment of the liquid level indicator of the present invention.
  • the liquid level indicator 100 includes a casing 1 and a pendulum 2, wherein the casing 1 is composed of a casing 10, a pin 1 1 and a transparent window 12
  • the integral part of the elastic arm 14 is provided with a liquid level indicating surface 22, which is, for example, a painted color area on one end of the pendulum.
  • the pendulum 1 is first rotatably mounted on the pin 1 1 of the casing 1 and then the plurality of level indicators 100 are engaged by the resilient arms 14 at different height positions in the side wall 200 of the container 400.
  • the pendulum of the liquid level indicator at the corresponding height position is subjected to the liquid side pressure, the pendulum rotates so that the liquid level indicating surface on the pendulum is within the visible range of the transparent window 12, thereby realizing the indication of the liquid level.
  • the pendulum 2 includes a hammer body 20, a mounting hole 21, a straight arm 24, and a liquid level indicating surface 22 on the hammer body 20.
  • the pendulum 2 is connected to the pin 11 of the casing 1 through the hole 21 to form a suspension form similar to a pendulum.
  • the angle between the center of gravity of the pendulum and the center of the hole 21 and the direction of gravity is within ⁇ .
  • the ⁇ is a small angle, for example less than 3 degrees, so that only a small force is required to be applied to the side 23 of the hammer 20, and the pendulum 2 can be rotated about the hole 21.
  • the casing 1 is further provided with a stopper 13, a slit 16, and a side hole 18.
  • the stop 13 is arranged to approach or contact the straight arm 24 of the pendulum 2 when the pendulum 2 is in a free state, thus limiting the pendulum 2 to be able to rotate about the pin 1 1 to a desired one. angle.
  • the slit 16 and the resilient arm 14 on the casing 1 allow it to be easily mounted and snapped onto the side wall 200 of the container.
  • the transparent window 12 is formed as a part of the casing 1.
  • the outer side of the transparent window 12 is a flat surface 121, and the inner side is a concave surface 122, thereby forming a concave lens-like effect to enhance the observable angle.
  • the side portion 23 of the pendulum 2 is first inserted into the side hole 18 of the casing 1, and then the hole 21 is rotatably fitted over the pin 1 1 to complete the assembly of the level indicator 100.
  • the assembled level indicator 100 is loaded into the corresponding position on the side wall 200 of the container 4 with the transparent window facing upward (i.e., the level indicator is vertical) as shown in Figures 5 and 6. At this time, the liquid level indicating surface 22 on the pendulum 2 is outside the visible range of the transparent window 12.
  • the installation position of the liquid level indicator 100 on the container 400 can be flexibly selected. Taking the installation arrangement shown in FIG. 7 as an example, the uppermost and lowermost liquid level indicators 100 can respectively indicate that the liquid in the container is full or The liquid level indicator 100 is placed on a different height section to obtain the corresponding liquid level height information, thereby facilitating the adjustment of the detection accuracy.
  • Figure 8 is a schematic view of another embodiment, and the main difference from the embodiment shown in Figure 5 is that it is installed in such a manner that the liquid level indicator 100 is placed horizontally instead of the former, that is, the transparent window is oriented to the left (or To the right).
  • the liquid level indicator 100 Due to the horizontal displacement of the liquid level indicator 100, the pendulum 2 cannot be reset by gravity. Therefore, as shown in Fig. 9, the liquid level indicator 100 adds a tension spring mechanism 5 to assist the pendulum to reset, which is the same as the embodiment shown in Fig. 6. It should be noted that the above-mentioned auxiliary reset mechanism may be realized by adding a torsion spring between the hole 21 of the pendulum 2 and the pin 1 1 of the casing 1, or using a flexible rubber cord instead of a tension spring.
  • Fig. 10 is a cross-sectional view showing another embodiment of the present invention, which is arranged in the same manner as the embodiment shown in Fig. 5.
  • the difference from the above two embodiments is that the link mechanism 900 and the indicator block 6 are used instead of the above-mentioned pendulum 2, and the cover 1 is also modified correspondingly, that is, the pin 1 is eliminated, and the pin 1A is added.
  • the pin 1 10 is provided with a sliding groove 19.
  • the link mechanism 900 includes a slide bar 9, a link 8, and a flexible wire 7.
  • the slide bar 9 also has an end face 91 for receiving the lateral force of the pad or the inner bag.
  • the link 8 is rotated by the center of the hole 81, and the lower end is in contact with the pin 92 on the slide bar 9, and the upper end is flexible.
  • the wire 7 is connected to the indicator block 6, and the indicator block 6 can freely slide up and down in the sliding groove 19 of the casing 1.
  • Fig. 11 is a cross-sectional view showing another embodiment of the present invention, which is different from the embodiment shown in Fig. 6 in that the cover is eliminated.
  • the pin 1 1 is placed at a corresponding position on the side wall of the container while a stopper 13 is provided at a corresponding position on the side wall of the container.
  • the pendulum 2 is first rotatably mounted to the container side wall 200 through the mounting hole and the pin 1 1 , and then the transparent window 12 is mounted.
  • the working principle of the embodiment is the same as that of the embodiment shown in FIG. 6, and details are not described herein again.
  • the liquid level indicator is preferably made of plastic.
  • the liquid level indicator of the present invention can drive the indicator surface or the indicator block to move when subjected to the side pressure of the liquid or the inner bag of the inner container in the closed container, and the operator can directly observe the liquid level directly through the transparent window.
  • Even small pressures such as less than 0.5 Newtons, can drive the pendulum or linkage to act, so the level indicator of the present invention has a higher sensitivity.
  • this is adopted The pure mechanical structure has a simple structure, so the reliability is high, the cost is low, and the installation is convenient.

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
  • Level Indicators Using A Float (AREA)

Abstract

一种液位指示器(100)及采用该液位指示器(100)的容器。所述液位指示器(100)用于指示容器(400)内液体的液位,所述容器(400)包括底部、侧壁(200),所述液位指示器(100)安装在所述侧壁(200)上,所述液位指示器(100)包括:机械式驱动装置,该机械式驱动装置在受到容器(400)内液体的压力时动作;以及指示装置,所述机械式驱动装置动作时,驱动所述指示装置,使得所述指示装置在可视范围之内,从而指示容器(400)内液体的液位。该液位指示器(100)在受到液体的侧压力时,能够驱使指示面(22)或指示块运动,操作人员可通过透明窗直接有效地观察到液位高度,且结构简单、可靠性高、成本低廉,安装方便。

Description

液位指示器及采用该液位指示器的容器
本申请要求申请人于 2012年 1月 10日提交的题为 "液位指示器及采用该液 位指示器的容器" 的中国发明专利申请第 201210006278.0号的优先权, 其整体 内容以参见的方式纳入本文。 技术领域
本发明涉及液体运输容器, 具体涉及容器中液体液位的指示。 背景技术
在食品、 医药、 化学等类物品运输过程中, 维持容器的完整从而防止污染物 进入或溢出是十分重要的。 尤其是在运送大量液体时, 更需要容器具有密闭性, 或者具有一个可封盖的盖板。 而且, 这些液体往往盛放在一个内胆袋内, 或者 不可渗透的衬垫内。 这样就导致了不能从容器的侧壁上形成和液体相通的等液 位机构, 这意味着传统的方法是不可能观测到容器内液体的液位高度的。 而液 体的液位高度的多少, 也就是体积 (抑或是重量)在车间灌装、 仓库存储、 出厂检 验等环节是十分重要的数据。 因此, 要求寻找一种方法来检测密闭容器中盛放 在内胆袋或者衬垫内的液体的液位高度。
已知的方法中最传统的是在侧壁上设计透明窗, 通过透明窗来观测容器内液 位的高度。 这种方法虽然成本低廉, 但因为容器的密闭性, 其内部的光线黯淡, 且透明窗的大小不能做的太大而影响侧壁的结构强度, 所以实际指示效果并不 太理想。
在专利 CA2645089A中提到了一种电子式指示液位的方法, 如图 1所示, 其 大致原理是: 在容器侧壁内表面上安装有一排竖直的压力传感器, 在该侧壁的 外表面 1000上的对应位置设有可目视的 LED灯 1001。 当液体通过内胆袋或衬 垫对感应器施加侧压力时, 外壁上相应的指示相应液位的 LED灯就会亮起, 从 而实现液位的指示。
专利 CA2645089A中提到的测量液位高度的方法虽然直观, 但成本高昂, 安 装不便, 且由于传感器、 电路等在潮湿环境下工作, 容易失效, 因此可靠性不 高。 此外, 这种方法还需要接通电源或更换电池, 还使得使用不方便。 因此, 需要提供一种指示效果好、 成本低廉、 安装方便、 可靠性高、 使用方 便的液位指示器。 发明内容
本发明的目的是提供一种指示效果好、 成本低廉、 安装方便、 可靠性高、 使 用方便的液位指示器。
为实现上述目的, 本发明提供了一种液位指示器, 用于指示容器内液体液 位, 所述容器包括底部、 侧壁, 所述液位指示器安装在所述侧壁上, 其中, 所 述液位指示器包括:
机械式驱动装置, 所述机械式驱动装置在受到所述容器内液体的压力时动 作; 以及
指示装置, 所述机械式驱动装置动作时, 驱动所述指示装置, 使得所述指 示装置在可视范围之内, 从而指示所述容器内的液体液位。
一优选实施例中, 所述机械式驱动装置包括摆锤、 销, 所述指示装置设置 在所述摆锤的一端上, 所述摆锤可转动地安装在所述销上, 其中:
在自由状态下, 所述指示装置在可视范围之外;
在所述摆锤受到所述容器内液体的压力而摆动时, 所述指示装置在可视范 围之内。
另一优选实施例中, 所述机械式驱动装置包括罩壳、 连杆机构, 所述指示 装置为指示块, 所述连杆机构和所述指示块安装在所述罩壳内, 当所述连杆机 构受到所述容器内液体的压力时, 驱动所述指示块动作, 使得所述指示块在可 视范围之内。
另一优选实施例中, 所述液位指示器还包括罩壳, 所述罩壳是由壳体、 销、 透明窗、 弹性臂构成的一体件, 所述摆锤可转动地安装在所述罩壳的销上。
另一优选实施例中, 所述液位指示器还包括拉簧, 所述拉簧连接所述摆锤 和罩壳, 以提供使所述摆锤回复的回复力。
另一优选实施例中, 所述罩壳是壳体、 销、 透明窗、 弹性臂构成的一体件, 所述壳体上设有滑动槽, 所述指示块在所述滑动槽中滑动。
另一优选实施例中, 所述连杆机构由滑杆、 连杆、 柔性丝构成, 所述滑杆 和所述连杆接触连接, 所述连杆通过所述柔性丝与所述指示块连接, 所述滑杆 受容器内液体侧压力时, 所述指示块在所述柔性丝的带动下在所述滑动槽中上 下滑动。
另一优选实施例中, 所述壳体上还设置有用于限制所述摆锤运动范围的止 挡块。
另一优选实施例中, 所述透明窗外侧为平面, 内侧为凹面。
本发明还提供了一种采用上述液位指示器的容器, 所述容器侧壁上沿高度 方向设置有多个所述液位指示器。
本发明的液位指示器在受到受到密闭容器内盛放液体的衬垫或内胆袋的侧 压力时, 能够驱使指示面或指示块运动, 操作人员可通过透明窗直接有效地观 察到液位高度。 经实验表明, 即使是很小的压力, 例如小于 0.5牛顿, 也可以驱 使摆锤或连杆动作, 因此本发明的液位指示器具有较高的灵敏度。 此外, 由此 采用了纯机械结构, 且结构简单, 因此可靠性较高、 成本低廉, 安装方便。 附图说明
图 1是现有技术的一种液位指示器的结构示意图;
图 2是本发明的液位指示器的第一实施例的立体图;
图 3是图 2中液位指示器的摆锤的正视图;
图 4是图 2中液位指示器的外壳的立体图;
图 5是图 2中液位指示器在周转箱上的安装位置及安装方向的示意图; 图 6是图 2中液位指示器的剖视图, 示出安装在容器侧壁中的自由状态。 图 7是安装在容器侧壁中的液位指示器受力时的示意图;
图 8是为另一实施例中液位指示器在周转箱上的安装方向的示意图; 图 9是对应于图 8的安装方向的安装在容器侧壁中的液位指示器的结构的剖 视图;
图 10是本发明的液位指示器的另一实施例的示意图;
图 1 1是本发明的液位指示器的另一实施例的示意图; 具体实施方式
以下将结合附图对本发明的较佳实施例进行详细说明, 以便更清楚理解本发明 的目的、特点和优点。应理解的是, 附图所示的实施例并不是对本发明范围的限制, 而只是为了说明本发明技术方案的实质精神。 图中相同或相似的部分采用相同的附 图标记表示。 如图 1-6所示, 本发明的一较佳实施例中, 液位指示器 100包括罩壳 1和摆 锤 2, 其中, 罩壳 1是由壳体 10、 销 1 1、 透明窗 12、 弹性臂 14构成的一体件, 摆锤 1上设有液位指示面 22, 指示面例如为摆锤一端上的涂颜色区域。使用时, 首先将摆锤 1可转动地安装在罩壳 1的销 1 1上, 然后将多个液位指示器 100通 过弹性臂 14卡合在容器 400的侧壁 200中不同高度位置处。 当相应高度位置处 的液位指示器的摆锤受到液体侧压力时, 摆锤转动, 使得摆锤上的液位指示面 在透明窗 12的可视范围之内, 从而实现液位的指示。
上述实施例中, 如图 3所示, 摆锤 2包括锤体 20、 安装孔 21、 直臂 24、 位 于锤体 20上的液位指示面 22。摆锤 2通过孔 21和罩壳 1的销 1 1连接形成类似 于钟摆的悬挂形式, 在自由状态下, 摆锤重心与孔 21的中心的连线与重力方向 形成的角度在 α之内, 该 α是一个小幅度的角度, 例如小于 3度, 使得只需要 一个较小的力施加锤体 20的侧部 23上,摆锤 2就能够以孔 21为轴心进行旋转。
如图 4所示, 罩壳 1上还设有挡块 13、 切口 16、 侧孔 18。 如图 6所示, 挡 块 13设置成在摆锤 2处于自由状态时, 临近或接触摆锤 2的直臂 24, 这样就限 制了摆锤 2只能够绕销 1 1旋转到一个所要求的角度。 罩壳 1上的切口 16和弹 性臂 14可以使其轻松安装并扣合在容器的侧壁 200上。透明窗 12形成为罩壳 1 的一部分, 较佳地, 如图 6所示, 透明窗 12外侧为平面 121, 内侧为凹面 122, 由此形成了类似凹透镜的效果, 以提高可观测角度。
安装时, 首先将摆锤 2的侧部 23伸入到罩壳 1 的侧孔 18中, 然后将孔 21 可转动地套在销 1 1上, 从而完成液位指示器 100的装配。 将装配完成后的液位 指示器 100装入容器 4的侧壁 200上的相应位置处, 透明窗的方向朝上 (即液 位指示器竖放) , 如图 5和 6所示。 此时, 摆锤 2上的液位指示面 22在透明窗 12的可视范围之外。
如图 7所示, 当摆锤 2的侧部 23受到盛放液体的衬垫或内胆袋挤压时, 相 当于一个侧向力 F作用在侧部 23上。 这时摆锤 2逆时针转动, 指示面 22进入 到罩壳 1的透明窗 12的可视范围之内, 从而可以让人们直观的查看到内部液体 的液位高度。 当液位高度下降到侧部 23之下, 内胆袋或者衬垫不再有侧向力作 用于侧部 23上, 摆锤 2 由重力作用自行复位到自由状态, 使得液位指示面 22 回复到透明窗 12的可视范围之外。
液位指示器 100在容器 400上的安装位置可以灵活选择, 以图 7所示安装排 布为例, 最上方和最下方的液位指示器 100 分别可以指示容器内的液体充满或 者即将排空, 而在不同的高度段上放置液位指示器 100 可以获得对应的液位高 度信息, 由此可方便地调整检测精度。
图 8是另一实施例的示意图, 和图 5所示实施例主要不同之处在于, 它的安 装方式为液位指示器 100横放而不是前者的竖放,即透明窗方向朝左(或朝右)。
由于液位指示器 100横放的原因, 摆锤 2不能够借助重力进行复位。 因此, 如图 9所示, 液位指示器 100增加了一个拉簧机构 5来辅助摆锤进行复位, 其 余与图 6 所示实施例相同。 需要指出的是, 上述的辅助复位机构, 也可以采用 摆锤 2的孔 21和罩壳 1 的销 1 1之间添加扭簧来实现, 或者使用弹性的橡胶绳 来代替拉簧等方式。
图 10是本发明的另一实施例的剖视图, 其安装排布方式与图 5所示实施例 相同。 与上述两个实施方式不同之处在于, 采用了连杆机构 900和指示块 6来 代替上述的摆锤 2, 罩壳 1也作了相应的变型, 即取消了销 1 1, 增加了销 1A、 销 1 10, 并设有滑动槽 19。 连杆机构 900包括滑杆 9、 连杆 8、 柔性丝 7。 滑杆 9也具有一个用来接受衬垫或内胆袋侧向力的端面 91, 连杆 8以孔 81的中心为 旋转轴, 下端和滑杆 9上的销 92作接触连接, 上端通过柔性丝 7和指示块 6相 连接, 指示块 6可以在罩壳 1的滑动槽 19中自由上下滑动。
当液体的液位高度超过滑杆 9时, 液体侧向压强会通过衬垫或内胆袋向端面 91 施加一个侧向作用力 F, 滑杆向右移动, 同时推动连杆 8逆时针旋转, 通过 柔性丝 7使指示块 6向上提起, 到达透明窗 12的可观测范围内。 当液位高度下 降到端面 91之下, 作用力 F消失, 指示块 6在重力作用(也可以是其它弹性力) 下向下滑落, 并透过柔性丝 7拉动连杆 8顺时针旋转, 从而推动滑杆 9复位。
图 1 1是本发明的另一实施例的剖视图, 与图 6所示实施例的不同之处在于, 取消了罩壳。 销 1 1设置在容器侧壁上的相应位置处, 同时在容器侧壁上的相应 位置处设置止挡块 13。 安装时, 首先通过安装孔和销 1 1将摆锤 2可转动地安装 到容器侧壁 200上, 然后再安装透明窗 12。 本实施例的工作原理与图 6所示实 施例的工作原理相同, 在此不再赘述。
上述各实施例中, 液位指示器较佳地由塑料制成。
本发明的液位指示器在受到密闭容器内盛放液体的衬垫或内胆袋的侧压力 时, 能够驱使指示面或指示块运动, 操作人员可通过透明窗直接有效地观察到 液位高度。 经实验表明, 即使是很小的压力, 例如小于 0.5牛顿, 也可以驱使摆 锤或连杆动作, 因此本发明的液位指示器具有较高的灵敏度。 此外, 由此采用 了纯机械结构, 且结构简单, 因此可靠性较高、 成本低廉, 安装方便。
以上已详细描述了本发明的较佳实施例, 但应理解到, 在阅读了本发明的上 述讲授内容之后, 本领域技术人员可以对本发明作各种改动或修改。 这些等价 形式同样落于本申请所附权利要求书所限定的范围。

Claims

权 利 要 求
1. 一种液位指示器, 用于指示容器内液体液位, 所述容器包括底部、 侧壁, 所述液位指示器安装在所述侧壁上, 其特征在于, 所述液位指示器包括:
机械式驱动装置, 所述机械式驱动装置在受到所述容器内液体的压力时动 作; 以及
指示装置, 所述机械式驱动装置动作时, 驱动所述指示装置, 使得所述指 示装置在可视范围之内, 从而指示所述容器内的液体液位。
2. 如权利要求 1所述的液位指示器, 其特征在于, 所述机械式驱动装置包 括摆锤、 销, 所述指示装置设置在所述摆锤的一端上, 所述摆锤可转动地安装 在所述销上, 其中:
在自由状态下, 所述指示装置在可视范围之外;
在所述摆锤受到所述容器内液体的压力而摆动时, 所述指示装置在可视范 围之内。
3. 如权利要求 1所述的液位指示器, 其特征在于, 所述机械式驱动装置包 括罩壳、 连杆机构, 所述指示装置为指示块, 所述连杆机构和所述指示块安装 在所述罩壳内, 当所述连杆机构受到所述容器内液体的压力时, 驱动所述指示 块动作, 使得所述指示块在可视范围之内。
4. 如权利要求 2所述的液位指示器, 其特征在于, 所述液位指示器还包括 罩壳, 所述罩壳是由壳体、 销、 透明窗、 弹性臂构成的一体件, 所述摆锤可转 动地安装在所述罩壳的销上。
5. 如权利要求 4所述的液位指示器, 其特征在于, 所述液位指示器还包括 拉簧, 所述拉簧连接所述摆锤和罩壳, 以提供使所述摆锤回复的回复力。
6. 如权利要求 3所述的液位指示器, 其特征在于, 所述罩壳是壳体、 销、 透明窗、 弹性臂构成的一体件, 所述壳体上设有滑动槽, 所述指示块在所述滑 动槽中滑动。
7. 如权利要求 6所述的液位指示器, 其特征在于, 所述连杆机构由滑杆、 连杆、 柔性丝构成, 所述滑杆和所述连杆接触连接, 所述连杆通过所述柔性丝 与所述指示块连接, 所述滑杆受容器内液体侧压力时, 所述指示块在所述柔性 丝的带动下在所述滑动槽中上下滑动。
8. 如权利要求 4或 5所述的液位指示器, 其特征在于, 所述壳体上还设置 有用于限制所述摆锤运动范围的止挡块。
9. 如权利要求 4-7中任一项所述的液位指示器, 其特征在于, 所述透明窗 外侧为平面, 内侧为凹面。
10. 一种采用权利要求 1 -7中任一项所述的液位指示器的容器, 其特征在于,
PCT/CN2013/070321 2012-01-10 2013-01-10 液位指示器及采用该液位指示器的容器 WO2013104323A1 (zh)

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