JPH0577729U - Liquid level detector in container - Google Patents

Abstract

(57) [Summary] [Purpose] To detect the amount of liquid in the container easily and automatically. [Structure] A table (21) on which one end side (24) is rotatably supported so that a storage container (10) can be placed and can be tilted while being placed, and a cylinder (31) fixed on a stationary side. ) And a piston slidably fitted in the cylinder (31) and the other end side (2) of the table (21).
3) A cylinder device (30) having a piston rod (32) engaged with the cylinder device (30), and a fixed position on the other end side (23) of the table (21) via the piston rod (32) to the cylinder device (30). A drag force imparting air supply means (40) for imparting an air pressure for imparting a drag force within the range and a table (21) are provided in accordance with the increase or decrease of the liquid amount in the container (10) placed on the table (21). And a detecting means (50) for detecting that the tilt rotation is performed by a set angle.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a liquid amount detecting device in a container.

[0002]

[Prior Art]

 Various liquids are often loaded and unloaded in storage containers (for example, drums). The inside of such a container is invisible when made of metal. In addition, if it is made of synthetic resin, it may be visible due to its liquid color. However, in any case, it is difficult to constantly monitor the amount of liquid in the storage container due to human problems.

Particularly, for example, in a surface treatment device, when the chemical solution delivered in a drum can is continuously or intermittently replenished in an appropriate amount into a predetermined treatment tank, the stored solution amount may be exhausted. Is not allowed. This is because defective products are generated and the pump is burnt out.

Thus, conventionally, as shown in FIG. 3, for example, a liquid tank 1 provided with a liquid level detector including a float 3 and a level detector 4 temporarily stores the liquid delivered in a storage container 10. It was transferred and was supplied to the processing tank etc. using the hose 5, the pipe 6, the pump 7, etc. Then, when the liquid level detectors (3, 4) are activated, new liquid is replenished from the next container 10.

[0005]

[Problems to be solved by the device]

 However, according to the above-mentioned conventional method, in order to replenish the liquid storage tank 1 with new liquid, it is necessary to lift the high-weight container 10 with a crane and adjust the posture of the inlet / outlet 11 to a predetermined position before injecting while tilting. And must be replaced after injection. Therefore, not only is it labor-intensive and labor-intensive, but the property of the stored liquid may cause human injury and waste due to leakage, resulting in a cost disadvantage.

Further, since it is necessary to install a crane or the like and dispose the liquid storage tank 1 having a relatively large capacity, there is a problem that the device becomes large-sized, the economical burden increases, and layout restrictions frequently occur.

In addition, the disadvantages including such a problem similarly occur when a used liquid, that is, a waste liquid is stored in the storage container 10 and stored or discarded.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a liquid amount detection device in a storage container capable of automatically detecting a stored liquid amount easily and accurately.

[0009]

[Means for Solving the Problems]

 According to the present invention, most of the storage containers have a closed structure for convenience of transportation and leakage prevention, and a structure with a small entrance / exit, further, a level detector or the like cannot be directly mounted, and a storage tank, etc. It is not always necessary to manage the amount of liquid in a small amount at all times. It is configured so that the amount of stored liquid can be automatically detected from the change in weight.

That is, the liquid amount detecting device in the storage container according to the present invention includes a table on which one end side is rotatably supported so that the storage container can be placed and can be tilted while being placed, and a stationary side. A cylinder device having a cylinder fixed to the cylinder and a piston rod slidably fitted in the cylinder and having a piston rod engaged with the other end of the table, and a piston rod attached to the cylinder device. Via the drag force-supplying air supply means for applying air pressure to the other end side of the table to apply a drag force within a certain range, and the table is set at a set angle according to the increase or decrease in the amount of liquid in the container placed on the table. And a detection means for detecting that the tilt rotation has been performed.

[0011]

[Action]

 In the present invention having the above-mentioned configuration, for example, a full container is placed on the table, and air pressure is applied to the cylinder device from the drag-applying air supply means to adjust the posture so that the table becomes horizontal, for example. Then, the liquid is sucked out directly from the container and used in appropriate amounts. Then, since the drag force is constant, the table rotates with one end side as the center of rotation each time the amount of liquid in the container decreases. That is, the table inclines with the container placed. Here, when the table is tilted by a set angle, the detection means operates. That is, it is possible to automatically detect that the amount of liquid in the storage container has reached a certain amount.

Therefore, by properly setting the air pressure applied from the drag applying air supply means and the detection angle of the detection means, it is possible to accurately determine that the liquid amount in the storage container has reached a predetermined amount (hereinafter, above). It can be detected automatically. Liquid volume can be controlled without preparing a special liquid storage tank equipped with a liquid level detector. There is no need to transfer the container. It should be noted that even when the waste liquid or the like is collected in the empty container, the rotation direction of the table is reversed, and the same operation is performed.

[0013]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 and 2, the liquid amount detecting device in the storage container includes a table device 20, a cylinder device 30, a drag applying air supply means 40, and a detecting means 50. It is configured so that the increase or decrease in the value of is converted into the tilt movement of the table 21 and is automatically detected.

In FIG. 1, reference numeral 10 denotes a container, and in the case of this embodiment, it has a drum can shape for containing a surface treatment chemical. A doorway 11 is provided at the top and the bottom is flat.

Reference numeral 20 denotes a table device, one end of which is rotatably supported by a pin 22 so that the container 10 can be placed and can be tilted. An engaging portion 23 is integrally provided on the other end side. Further, the hook portion 24 on the one end side is provided for forming a stopper and facilitating delivery with the carry-in / carry-out guide base 60.

The cylinder device 30 includes a cylinder 31 fixed to a foundation (stationary side), a piston (not shown) slidably fitted in the cylinder 31, and a piston integrated with the piston. A piston rod 32, and the tip of the piston rod 32 is engaged with the other end side (engagement portion 23) of the table 21 via a rotating piece member 33. Therefore, the table 21 can be tilted about the pin 22 by tilting the piston rod 32.

Next, the drag imparting air supply means 40 is a means for constantly applying a set air pressure to the cylinder 31, and the set air pressure is in a certain range on the other end side (23) of the table 21 via the piston rod 32. It is set as a value that can generate a drag force within. That is, the drag imparting air supply means 40 is composed of the compressed air source 41 and the pressure adjustment valve 42 shown in FIG. 1, and the liquid amount (liquid level L) in the container 10 is changed from the state shown in FIG. When the pressure decreases as shown by the dotted line in FIG. 2, the air pressure is supplied so that the table 21 can be tilted while the container 10 is placed. Reference numeral 43 is a pressure gauge, which is referred to when adjusting the supply air pressure.

On the other hand, when the waste liquid in the empty container 10 is to be collected and it is desired to automatically detect that it is full, for example, the relief valve (44) surrounded by the symbol () in FIG. A valve (45) may be provided. That is, the pressure adjusting valve 42 is adjusted to adjust the protrusion amount of the piston rod 32 so that the table 21 on which the empty container 10 is placed is inclined at a certain angle, and the stop valve (45) is closed. .. Therefore, each time the amount of liquid in the container 10 increases, the force of pushing down the piston rod 32 increases and the air pressure in the cylinder 31 increases. When it is full, push down the table 21 so that it is horizontal. At this time, the relief valve (44) may be set to open.

The detection means 50 is a means for detecting that the table 21 is tilted and rotated by a set angle, and includes a limit switch 52 having a detection lever 51 and a detection circuit 53. The detection lever 51 is set by being engaged with the detected body 51 locked to the piston rod 32.

Next, the operation of this embodiment will be described. Now, consider a case where the chemical solution filled in the storage container 10 is replenished in an appropriate amount to a predetermined processing tank through a hose 5, a pump, etc. inserted from the inlet / outlet 11.

Now, the container 10 filled with the chemical solution is placed on the table 21 via the loading / unloading guide 60. The table 21 is rotated in the clockwise direction in FIG. 1 around the pin 22 by the weight of the liquid (including the weight of the container 10 itself) to be in a horizontal state. At this time, the piston rod 32 is immersed in the cylinder 31.

Here, the drag force imparting air supply means 40 is operated to supply the air pressure from the piston rod 32 to the other end side (23) of the table 21 so that a drag force within a certain range can be applied. The pressure adjustment valve 42 is adjusted and operated with reference to the pressure gauge 43.

When the amount of liquid in the container 10 is gradually reduced by the replenishment, the other end side (23) is gradually pushed up by the piston rod 32. That is, the table 21 tilts and rotates about the pin 22 in the counterclockwise direction in FIG. The detection lever 51 is slightly tilted but is still engaged with the detected body 34, so that the limit switch 52 does not perform the detection operation.

Here, when the liquid amount (L) in the container 10 decreases as shown by the dotted line in FIG. 2, the pressing force from the table 21 side becomes small, so that the piston rod 32 becomes the other end side (23). Push upwards. That is, the table 21 is further inclined. Then, the detected body 34 and the detection lever 51 are disengaged, and the limit switch 52 operates for detection. Therefore, the detection circuit 53 can automatically detect that the liquid amount in the container 10 has decreased to a predetermined level.

In this way, the hose 5 can be pulled out from the inlet / outlet port 11, quickly replaced with the next container 10, and handled in the same manner.

When the empty storage container 10 is placed on the table 21 to recover waste liquid, the reverse operation in which the initial tilt of the table 21 and the tilt rotation direction of the table 21 due to the increase in the liquid amount are different However, since this operation can be easily inferred from the above, its explanation is omitted.

Therefore, according to this embodiment, the table 21, the cylinder device 30, the drag applying air supply means 40 and the detection means 50 are provided, and the liquid amount in the storage container 10 placed on the table 21 is stored. Since it is configured to be detected along with the weight of the container 10 itself, the amount of contained liquid can be detected easily and accurately automatically. Therefore, the facility load of the liquid storage tank 1 in which the liquid level detectors (3, 4) are installed, the handling difficulty such as the manual work of lifting and tilting the high-weight storage container 10, and the human damage. Can be cleaned up.

Further, since the table 21 has a flat plate structure and can be tilted, it is easy to carry in and out the storage container 10. The loading / unloading guide 60 further promotes this.

Further, since the cylinder device 30 and the drag applying air supply means 40 are formed so as to apply a drag within a certain range to the other end side (23) of the table 21, the inclination angle of the table 21 is increased. Can be proportionally changed as the amount of liquid in the container 10 increases or decreases. Therefore, the stored liquid amount can be accurately converted into the inclination angle.

Since the detection means 50 is composed of the limit switch 52 and the detection circuit 53, the inside of the container 10 can be selected by appropriately selecting the engagement state between the detected body 34 and the detection lever 51. It can be operated so as to detect the liquid volume at any level.

Further, since the loading / unloading guide base 60 is disposed on the one end side (24) of the table 21, the inclination of the loading / unloading guide base 60 can be used to easily move the storage container 10, and the storage container 10 can be easily moved. There is no need for posture adjustment work such as turning over.

In the above embodiment, the table 21 has a flat plate structure, but the structure / shape can be implemented as a structure / shape corresponding to the container 10. Further, although the cylinder device 30 applies a drag force to the table 21 from below, it may be formed so as to apply a pulling force (a drag force) from above. Furthermore, the detection means 50 is not limited to the limit switch 52, and may be formed of, for example, an air pressure detector or the like.

[0033]

[Effect of the device]

 According to the present invention, a table, a cylinder device, a drag force imparting air supply means, and a detection means are provided, and the amount of liquid in the container placed on the table is detected together with the weight of the container itself. Therefore, the stored liquid amount can be detected automatically easily and accurately. Therefore, it is possible to eliminate the facility burden such as the liquid storage tank equipped with the liquid level detector, the difficulty of handling by hand such as lifting and tilting the heavy container, and the human injury.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram showing an embodiment of the present invention.

FIG. 2 is likewise a diagram for explaining the operation.

FIG. 3 is a diagram for explaining a conventional example and its problems.

[Explanation of symbols]

 1 Liquid Storage Tank 3 Float 4 Level Detector 5 Hose 6 Piping 7 Pump 10 Storage Container 11 Entry / Exit 20 Table Device 21 Table 22 Pin 23 Engagement Part (Other End Side) 24 Hook Part (One End Side) 30 Cylinder Device 31 Cylinder 32 Piston rod 33 Rotating piece material 34 Detected body 40 Drag applying air supply means 41 Compressed air source 42 Pressure adjusting valve 43 Pressure gauge 44 Relief valve 45 Stop valve 50 Detecting means 51 Detecting lever 52 Limit switch 53 Detecting circuit

Claims (1)

[Scope of utility model registration request] 1. A table, one end side of which is rotatably supported so that an accommodating container can be placed and can be tilted while being placed, a cylinder fixed to a stationary side, and a slidable fit in the cylinder. A cylinder device having a mounted piston and a piston rod that is engaged with the other end side of the table, and applies a drag force within a certain range to the other end side of the table via the piston rod to the cylinder device. A drag force imparting air supply means for applying an air pressure to cause the table to rotate, and a detecting means for detecting that the table is tilted and rotated by a predetermined angle or more in accordance with an increase or decrease in the amount of liquid in the container placed on the table. A device for detecting a liquid amount in a storage container provided.