JPH05272642A - Pressure balancer - Google Patents

Abstract

PURPOSE:To provide a pressure balancer which is pressure controllable on a real-time basis, does not require to use complicated and expensive control equipments and driving equipments, and is safe from failure and therefore easy to control. CONSTITUTION:A pressure balancer comprisea a piston 10 axially movably provided within a hollow body 1, a diaphragm provided between the hollow body 1 and the piston 10 to isolate a space inside the hollow body, a guide shaft 9 provided projectively from the piston 10 in the axial direction of the hollow body 1 in such a manner as to penetrate through an end portion of the hollow body 1, a bearing 14 and a shaft seal 15 provided on the end portion of the hollow body 1 so as to guide the guide shaft 9, and a plurality of fluid vessel connection openings 18 provided respectively in the space portions isolated by the diaphragm 10 and respectively independently connected to a plurality of fluid vessels.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressure balancing device which can easily balance pressures in a plurality of fluid containers (for example, autoclaves) without being mixed with each other and without requiring electrical control.

[0002]

2. Description of the Related Art Conventionally, in order to balance the pressures in a plurality of fluid containers, a pressure sensor is attached to each fluid container, and an electric signal from the pressure sensor controls a pressure regulating valve or the like provided in each fluid container. Are known.

[0003]

However, in the case of controlling a plurality of fluid container pressures that are delicately changing in real time by using a large number of control devices and drive devices, some accuracy error may occur in each device. Therefore, there is a problem that adjustment is difficult. Further, the more control devices there are, the higher the cost and the more the causes of failure, so that there is a problem that their management becomes complicated.

The present invention has been made in view of the above circumstances, and an object of the present invention is to perform pressure control in real time, requiring no complicated and expensive control equipment, drive equipment, and the like, and also not causing a failure. The object is to provide a pressure balance device which is less and therefore easy to manage.

[0005]

In order to achieve the above object, the first aspect of the present invention is a pressure balancing device for balancing the pressures in a plurality of fluid containers, and a hollow body having both ends closed. , A piston provided movably in the axial direction in the hollow body, and provided between the hollow body and the piston,
A diaphragm for isolating the space in the hollow body, a guide shaft projecting from the piston in the axial direction of the hollow body, penetrating the end of the hollow body, and provided at the end of the hollow body, the guide A bearing for guiding the shaft and a shaft seal,
A plurality of fluid container connection ports provided in each of the spaces separated by the diaphragm and independently connected to the plurality of fluid containers are provided.

According to a second aspect of the present invention, in the first aspect, the guide shaft is provided with displacement amount detecting means for detecting an axial displacement amount of the guide shaft with respect to the hollow body.

A third aspect of the present invention is the guide according to the first aspect, which is opposed to the side surface of the movement locus of the guide shaft and is separated from the end of the hollow body by a predetermined distance to detect the protrusion of the guide shaft. The axis detecting means is provided.

[0008]

According to claim 1 of the pressure balancing device of the present invention,
By connecting a plurality of fluid containers whose inside is pressurized to the fluid container connection port, the diaphragm separating the hollow body moves the pistons according to the pressure difference generated in each fluid container. The pressure inside the fluid container is adjusted in real time and uniformly.

Further, according to the second aspect of the present invention, since the displacement amount detecting means for detecting the displacement amount of the guide shaft in the axial direction is provided, the guide in which the movement amount of the piston is projected from the piston is provided. It is detected by the movement amount of the shaft, and the balanced state of the pressure in the plurality of fluid containers is detected. For example, if the displacement amount detecting means is composed of a pointer fixed to the guide shaft and a scale fixed to a hollow body near the pointer, it is possible to visually check the pressure balance state in the fluid container from the outside. You can Further, if the displacement amount detecting means is constituted by a sensor that continuously electrically detects the displacement amount of the guide shaft, the pressure balanced state in the fluid container can be remotely monitored by the electric signal of the sensor. At the same time, the pressures in the plurality of fluid containers can be controlled based on the electric signals.

Further, according to a third aspect of the present invention, there is provided guide shaft detecting means which faces the side surface of the movement locus of the guide shaft and is separated from the end of the hollow body by a predetermined distance to detect the protrusion of the guide shaft. Since it is provided, it is detected that the guide shaft protrudes to the position of the guide shaft detecting means when the pressure difference in the plurality of fluid containers becomes large and the movement amount of the piston becomes large. Based on the result, it is possible to control, for example, to raise an alarm or adjust the pressure in the fluid container.

[0011]

Embodiments of the present invention will be described below with reference to FIGS.

FIG. 1 is a vertical sectional view of a pressure balancing device according to an embodiment of the present invention, in which reference numeral 1 is a hollow body. This hollow body 1 is provided between a pair of cylinder covers 2,
The cylinder 3 is tightened by the fastening bolt 5A and the nut 5B.
Connected to each other. A bearing 14 and a shaft seal 15 are coaxially mounted on both cylinder covers 2, and a guide shaft 9 is slidably mounted on the bearing 14 and the shaft seal 15. A piston 10 is fixed to the guide shaft 9 via a seal member 6 so as not to move relative to each other. A diaphragm 11 is sandwiched between the cylinder cover 2 and the cylinder 3, and the inner edge sides of these diaphragms 11 are sandwiched between both end faces of the piston 10 and the retainer 12 by a mounting bolt 13. Has been.

An air vent pipe connection port 17 and a fluid container connection port 18 are formed on the upper and lower sides of the end faces of both cylinder covers 2, respectively, and an air vent hole 19 is formed in the middle portion of the cylinder 3. Has been done.

Arms 20 extending in the radial direction of the guide shaft 9 are fixed to both ends of the guide shaft 9, and the connecting rods 21 are provided at the tips of these arms 20 in parallel with the axial direction of the hollow body 1. Is fixed. This connecting rod 2
A pointer 22 is fixed to a central portion of the cylinder 1, and a scale 23 having a scale formed in a direction parallel to the axial direction of the cylinder 3 is attached to a position of the cylinder 3 corresponding to the pointer 22. The arm 20 and the connecting rod 2
1, the pointer 22 and the scale 23 constitute the displacement amount detecting means of the present invention.

In the pressure balancing device constructed as described above, for example, as shown in FIGS. 2 and 3, the cylinder cover 2 and the cylinder 3 are sequentially connected and each air vent pipe connection port 17 is connected. Are used by connecting the vent pipes 26 each having a valve 26, and connecting the fluid containers 29 to the respective fluid container connection ports 18 via the valves 27.

In this case, when the pressure of any one of the fluid containers 29 increases or decreases between the fluid containers 29, the pressure of the increased or decreased fluid container 29 becomes
The fluid is transmitted from the fluid container connection port 18 into the hollow body 1, and the piston 10 is moved in the axial direction of the hollow body 1 in accordance with the pressure difference, so that the piston 10 and the diaphragm 11 in the hollow body 1 are isolated from each other. The pressure in each space is balanced. Therefore, since the pressure of each fluid container 29 connected to each space is also maintained uniformly, even if the pressure of any one of the fluid containers 29 increases or decreases, it becomes uniform in real time. The pressure can be adjusted to the above value, and no control device, drive device, etc. are required, and the operation can be performed with an extremely simple structure.

At this time, since the guide shaft 9 is fixed to the piston 10 so as not to move relative to it, the guide shaft 9 moves in the axial direction of the hollow body 1 along with the movement of the piston 10, and the arm 20 is attached to the guide shaft 9. The pointer 22 is fixed through the scale 2, and the hollow body 1 has a scale 2 corresponding to the pointer 22.
3, the displacement amount of the guide shaft 9 can be visually detected, and the movement amount of the piston 10 can be monitored to visually monitor the pressure balance state in the fluid container 29 from the outside. You can Therefore, it is possible to visually detect that the piston 10 largely moves from the neutral point and a large difference occurs in the volume ratio of the plurality of fluid containers 29, or that the deformation allowable range of the diaphragm 11 approaches the limit. Based on this result, it is possible to take various measures to reduce the volume ratio and to make the deformation amount of the diaphragm 11 appropriate. That is, when the pointer 22 is stopped within a predetermined range from the neutral point with respect to the scale 23, the pressures in the respective fluid containers 29 are balanced, so that it is not necessary to take any measures for adjusting the pressure. When the pointer 22 is moving beyond the predetermined range with respect to the scale 23, it indicates that the pressures in the respective fluid containers 29 are not balanced, so that the fluid containers 29
The pressure in the fluid container 29 is adjusted by controlling the drive of the pressure control valve provided in the fluid container 29 or the pump for pumping the fluid to the fluid container 29 so that the pressure in the fluid container 29 is balanced.

Next, another embodiment of the present invention will be described with reference to FIG. That is, the pressure balancing apparatus of the present embodiment has the same internal structure as that shown in FIG. 1, fixes the pointer 30 to the tip of the guide shaft 9 protruding from the end of the cylinder cover 2, and also the cylinder cover. A scale 31 corresponding to the pointer 30 is attached so as to project from the end of the second guide 2, and further, two proximity switches (that face the side surface of the movement path of the guide shaft 9 and are spaced a predetermined distance from both ends of the cylinder cover). A guide shaft detecting means) 32 is attached.

In this embodiment, when the pressure difference in the plurality of fluid containers 29 becomes large and the movement amount of the piston 10 becomes large, the guide shaft 9 protrudes to the position of the proximity switch 32. It is detected by the proximity switch 32. Therefore, based on this detection result, for example, an alarm is issued after a predetermined time, or the pressure control valve provided in the fluid container 29 or the drive of a pump for pumping fluid to the fluid container 29 is controlled to control the pressure in the fluid container 29. Can be controlled to adjust.

In each of the above-described embodiments, the pointers 22 and 30 and the scales 23 and 31 are provided as the displacement amount detecting means, but the displacement amount detecting means continuously changes the displacement amount of the guide shaft 9. If a sensor (for example, a linear scale) that electrically detects is used, the pressure balanced state in the fluid container 29 can be remotely monitored by the electric signal of this sensor. Further, based on the electric signal, the drive of a pressure control valve provided in the fluid container 29 or a pump for pumping a fluid to the fluid container 29 is controlled to control the pressure in the fluid container 29. You can also

[0021]

As described above, according to the first aspect of the present invention.
According to the described pressure balance device, a pressure balance device for balancing the pressures in a plurality of fluid containers, the hollow body having both ends closed, and a piston movably provided in the hollow body in the axial direction. A diaphragm that is provided between the hollow body and the piston and that isolates the space in the hollow body, and a guide shaft that projects from the piston in the axial direction of the hollow body and that penetrates the end of the hollow body. A plurality of bearings and shaft seals that are provided at the end of the hollow body and that guide the guide shaft; and a plurality of spaces that are respectively provided in the spaces separated by the diaphragm and that are independently connected to the plurality of fluid containers. With the fluid container connection port of the above, a plurality of fluid containers whose insides are pressurized are connected to the fluid container connection port, and each flow is controlled by the diaphragm separating the hollow body. By moving the piston according to the pressure difference generated in the container, the pressure in each fluid container can be uniformly adjusted in real time, and complicated and expensive control equipment, drive equipment, etc. are not required. However, there are few failures, so management can be performed easily.

Further, according to claim 2 of the present invention, since the displacement amount detecting means for detecting the displacement amount of the guide shaft in the axial direction is provided, the movement amount of the piston is moved by the movement of the guide shaft provided on the piston. It is possible to detect by quantity, and it is possible to detect the equilibrium state of pressures in a plurality of fluid containers.

Further, according to a third aspect of the present invention, guide shaft detecting means for detecting the protrusion of the guide shaft is provided so as to face the side surface of the movement path of the guide shaft and be spaced a predetermined distance from the end of the hollow body. Therefore, it is possible to detect that the guide shaft protrudes to the position of the guide shaft detecting means when the pressure difference in the plurality of fluid containers becomes large and the movement amount of the piston becomes large. Based on the result, for example, an alarm can be issued or control can be performed to adjust the pressure in the fluid container.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a pressure balancing device which is an embodiment of the present invention.

FIG. 2 is a schematic configuration diagram showing an example in which a plurality of fluid containers are connected to the pressure balancing device of FIG.

FIG. 3 is a schematic configuration diagram showing another example in which a plurality of fluid containers are connected to the pressure balancing device of FIG.

FIG. 4 is a front view showing a pressure balancing device which is another embodiment of the present invention.

[Explanation of symbols]

 1 hollow body 2 cylinder cover 3 cylinder 9 guide shaft 10 piston 11 diaphragm 14 bearing 15 shaft seal 18 fluid container connection port 20 arm (displacement amount detecting means) 21 rod (displacement amount detecting means) 22 pointer (displacement amount detecting means) 23 Scale (displacement amount detecting means) 29 Fluid container 30 Pointer (displacement amount detecting means) 31 Scale (displacement amount detecting means) 32 Proximity switch (guide axis detecting means)

Claims (3)

[Claims] 1. A pressure balancing device for balancing the pressure in a plurality of fluid containers, the hollow body having both ends closed, a piston movably provided in the hollow body in the axial direction, and the hollow body. And a piston, which is provided between the hollow body and a space between the hollow body, a guide shaft protruding from the piston in the axial direction of the hollow body and penetrating an end of the hollow body, and the hollow body. Provided at the end of
A bearing and a shaft seal for guiding the guide shaft, and a plurality of fluid container connection ports provided in each of the spaces separated by the diaphragm and independently connected to the plurality of fluid containers, respectively. Characteristic pressure balance device. 2. The pressure balancing device according to claim 1, wherein the guide shaft is provided with displacement amount detecting means for detecting the displacement amount of the guide shaft in the axial direction with respect to the hollow body. 3. A guide shaft detecting means for detecting the protrusion of the guide shaft is provided so as to face the side surface of the movement path of the guide shaft and be spaced a predetermined distance from the end of the hollow body. The pressure balancing device according to claim 1.