JPH0686033U - Liquid tank - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a liquid tank that is less likely to cause distortion on the joint that hinders measurement of the amount of remaining liquid. [Structure] A weight measuring unit 4 for measuring the weight of a liquid tank main body 2 together with a stored liquid is provided, and a spiral axis α of a pipe pipe 3 connected to the liquid tank main body 2 is set in a substantially vertical direction. A liquid tank having a spiral tube portion 7.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a liquid tank having a weight measuring unit for measuring the weight of a stored liquid.

[0002]

[Prior art]

 Some liquid tanks used for applications such as supply of raw material gas are equipped with a weight measuring unit for measuring the weight of the stored liquid in order to manage the liquid amount. Conventionally, such a liquid tank is shown in FIG. The liquid tank 50 includes a liquid tank main body 52 provided in the liquid tank chamber 51, an L-shaped pipe 53 connected to the upper end of the liquid tank main body 52, and the weight of the liquid tank main body 52 together with the stored liquid. And a weight measuring unit 54 for measuring. The piping pipe 53 has its front end portion led out to the outside through a joint 55 provided on the side wall 51a of the liquid tank chamber 51. The weight measuring unit 54 is composed of, for example, a load cell.

The liquid tank 50 supplies the stored liquid in the form of a raw material gas or the like to the outside through a piping pipe 53, measures the weight of the liquid tank main body 52 together with the stored liquid, and uses the measured value to determine an empty liquid tank main body. The weight of the residual liquid, that is, the amount of the residual liquid is calculated by subtracting the weight of 52, that is, by so-called emptying measurement.

[0004]

[Problems to be solved by the device]

 By the way, such a liquid tank 50 has the following problems. That is, the liquid pipe 52 is fixed to the liquid tank main body 52, and the structural condition of the joint between the liquid tank main body 52 and the pipe 53 affects the weight measurement. Will give. Therefore, in order to prevent the joint distortion between the liquid tank main body 52 and the piping pipe 53, the liquid tank main body 52 and the weight measuring unit 54 are installed by a height adjusting mechanism (not shown) when the liquid tank 50 is installed. The height is adjusted to eliminate distortion on the joint between the two.

However, depending on the stored liquid, the liquid in the liquid tank main body 52 may be heated or pressure may be applied to the liquid tank main body 52. In such a case, the liquid tank main body 52 or piping In some cases, the pipe 53 expands and is deformed, causing distortion on the joint between the two, which makes the weight measurement inaccurate. Furthermore, when such a distortion occurs, it is necessary to readjust the height of the liquid tank body 52 and the weight measuring unit 54 each time, which makes the measurement of the residual liquid amount very troublesome. .

Therefore, an object of the present invention is to provide a liquid tank in which distortion on the joint that hinders the measurement of the residual liquid amount is less likely to occur.

[0007]

[Means for Solving the Problems]

 In order to achieve such an object, in the present invention, a liquid tank main body, a piping pipe connected to the liquid tank main body, and a weight measuring unit for measuring the weight of the liquid tank main body together with the stored liquid. In a liquid tank including and, the pipe is equipped with a spiral pipe portion whose spiral axis is set in a substantially vertical direction.

[0008]

[Action]

 According to the above configuration, the spiral pipe portion is easily deformed when an external force is exerted, and thus the deformation of the joint caused between the liquid tank body and the pipe is absorbed.

Further, since the spiral axis of the spiral tube portion is set to be substantially vertical, one end of the spiral tube portion is located at the lowermost position of the spiral tube portion. Therefore, the stored liquid staying in the spiral pipe portion does not flow down and stagnant in the spiral pipe portion.

[0010]

【Example】

 Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a perspective view showing the structure of a liquid tank according to an embodiment of the present invention.

Like the conventional example, the liquid tank 1 supplies the stored liquid to the outside in the form of a raw material gas or the like, measures the weight of the liquid tank together with the stored liquid, and uses the measured value to determine the empty liquid tank. The weight of the remaining liquid, that is, the amount of the remaining liquid is calculated by subtracting the weight, that is, the so-called void drawing measurement, and the liquid tank main body 2 that stores the storage liquid and the liquid is supplied from the liquid tank main body 2. A piping pipe 3 and a weight measuring unit 4 for measuring the weight of the liquid together with the liquid tank body are provided. These are arranged in the liquid tank chamber 5.

The piping pipe 3 is made of, for example, a stainless pipe, and its base end portion 3 a is connected to the upper end of the liquid tank body 2, while its tip end portion 3 b is provided on the side wall 5 a of the liquid tank chamber 5. It is led out of the liquid tank chamber 5 via a joint 6. The joint 6 is arranged above the upper end of the liquid tank body 2. The weight measuring unit 4 is composed of, for example, a load cell.

The piping pipe 3 is provided with a spiral pipe portion 7 in the middle thereof. The spiral tube portion 7 has a spiral shape in which the spiral axis α is set in the vertical direction, and therefore the liquid tank main body side end portion 7 a is at the lowest end position of the spiral pipe portion 7.

The liquid tank 1 configured as described above stores liquids such as raw material liquids, and heat or pressure may be applied to these stored liquids. In such a case, the liquid tank main body 2 and the piping pipe 3 may be expanded and deformed by the heat and pressure, and a joint distortion may occur between the two. Since the spiral tube portion 7 is easily deformed and absorbs the strain, such strain hardly affects the measurement of the weight measuring unit 4. Therefore, the measurement of the residual liquid weight, that is, the residual liquid amount becomes accurate, and when the liquid tank 1 is installed, the height of the liquid tank main body 2 and the weight measuring unit 4 are adjusted to reduce the distortion on the joint. If it is lost, height adjustment will not be redone after installation.

By the way, since the spiral tube portion 7 has a complicated structure, the liquid is likely to remain inside. However, since the spiral axis α of the spiral tube portion 7 is set in the vertical direction, the end portion on the liquid tank body side is at the lowest end position of the spiral tube portion 7 and remains in the spiral tube portion 7. The stored liquid never flows down into the liquid tank body 2 and stays in the spiral tube portion 7. Therefore, even when the corrosive liquid is stored in the liquid tank 1, the spiral tube portion 7 is unlikely to be corroded.

[0017]

[Effect of device]

 As described above, according to the present invention, since the spiral pipe portion is easily deformed to absorb the joint strain generated between the liquid tank body and the pipe, the joint strain is not generated. Since it does not affect the weight measurement, the liquid weight can be measured accurately, and there is no need for troublesome work such as fine adjustment of the height of the liquid tank body or piping pipe due to such distortion. It was

Further, since the spiral axis of the spiral tube portion is set in the substantially vertical direction, one end of the spiral tube portion is located at the lowermost position of the spiral tube portion, and the stored liquid does not stagnant in the spiral tube portion. . Therefore, despite having a relatively complicated structure of the spiral tube portion, corrosive liquid can be stored without fear of corrosion.

[Brief description of drawings]

FIG. 1 is a perspective view showing a structure of a liquid tank according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a structure of a liquid tank according to a conventional example.

[Explanation of symbols]

 2 Liquid tank body 3 Piping pipe 4 Weight measuring section 7 Spiral tube section α Spiral axis

Claims (1)

[Scope of utility model registration request] 1. A liquid tank comprising: a liquid tank main body; a piping pipe connected to the liquid tank main body; and a weight measuring unit for measuring the weight of the liquid tank main body together with the stored liquid. The liquid tank is characterized in that the pipe has a spiral tube portion whose spiral axis is set in a substantially vertical direction.