JPH0315841Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an accumulator used to store pressurized fluid energy.

[Prior art] Conventionally, as this type of accumulator, the first
As shown in the figure, a pressure vessel a for storing pressure liquid having a gas phase part b on the upper end side _a1 , and a gas cylinder (not shown in the figure) communicated with the gas phase part b of this pressure vessel through a gas passage c. ), when the liquid level of the pressure liquid A in the pressure vessel a reaches a set value, the gas passage c
Some devices are equipped with a valve mechanism d that shuts off.
And in such an accumulator,
The valve mechanism d is connected to a level meter e provided outside the pressure vessel a to display the liquid level of the pressure liquid A in the pressure vessel a, and a vertical position of a float f in the level meter e. Detected by a sensor, etc. not shown,
Generally, the valve g is closed by an electrical method when the liquid level exceeds a set value.

[Problem to be solved by the invention] However, with this type of device, if the liquid level in the pressure vessel changes suddenly, the liquid level in the pressure vessel and the level meter do not match, and the pressure liquid may close the valve. Problems may occur where the gas passes through and flows into the gas tank. In addition, a relatively complicated system is required to electrically detect the float position within the level meter and open/close the valve, resulting in increased costs.

The present invention aims to solve such problems.

[Means for Solving the Problems] In order to achieve the above objects, the present invention takes the following measures.

That is, the accumulator according to the present invention includes a pressure vessel for storing pressure liquid having a gas phase portion on the upper end side,
A gas cylinder communicated with the gas phase portion of the pressure vessel via a gas passage, and a valve mechanism that shuts off the gas passage when the liquid level of the pressure liquid in the pressure vessel reaches a set value. In the accumulator, the valve mechanism includes a seat surface provided in the gas passage, and a valve that is provided so as to be able to move toward and away from the seat surface from the pressure vessel side and is biased in the opening direction by gravity or elastic force. a push rod for pressing the valve body in the direction of the seat surface, a magnet that advances and retreats in conjunction with the push rod, and a fixed wall made of a magnetic material that is provided at one end of the advancement and retreat path of the magnet on the valve opening side. and a float that moves up and down in accordance with changes in the liquid level in the pressure vessel and starts pressing the push rod in the valve opening direction when the liquid level rises to a level lower than the set liquid level by a certain amount. The magnetic strength of the magnet is such that when the float presses the push rod by a certain amount and the liquid level reaches the set liquid level, the magnetic attraction between the magnet and the fixed wall causes the valve to open. It is characterized in that the valve body is set to a value that can overcome the force and press the valve body against the seat surface.

[Function] With such a configuration, when the pressure liquid is stored in the pressure vessel and the liquid level rises, the float is pushed up accordingly. At this time, the volume of the gas phase gradually decreases, and the gas in the gas phase flows out into the gas cylinder.From the point when the liquid level reaches a certain amount lower than the set value, the float begins to press the push rod in the valve closing direction. At this stage, the force trying to open the valve body due to gravity or elastic force is
Since the magnet overcomes the magnetic attraction force that tends to close the valve body, the valve body gradually moves in the closing direction as the float rises. Then, when the liquid level reaches the set value, the magnetic attraction force between the magnet and the fixed wall overcomes the valve opening force, and the valve body is immediately pressed against the seat surface by the magnetic attraction force, closing the valve. .
Therefore, even if the liquid level rises suddenly, the gas passage can be blocked the moment the level reaches the set value, and the gas passage can be closed only after the liquid level rises to an unexpected level. It is possible to prevent the problem of not being able to block the air passage.

Note that as the liquid level decreases from the state in which the valve body is closed, the pressure in the gas phase of the pressure vessel decreases, so the valve body is subject to a force other than the above-mentioned valve opening force.
Due to the pressure difference between the inside of the gas phase and the inside of the gas cylinder, a force from the gas trying to return to the inside of the pressure vessel acts, and the valve body returns to its original open position.

[Example] Hereinafter, an example of the present invention will be described with reference to FIGS. 2 and 3.

A pressure vessel 1 for storing pressure liquid having a gas phase part 2 at the upper end side and a pressure liquid inlet/outlet 1a at the lower end is communicated with the gas phase part 2 of this pressure vessel 1 through a gas passage 3. It includes a gas cylinder 4 and a valve mechanism 5 that shuts off the gas passage 3 when the level of the pressure liquid A in the pressure vessel 1 reaches a set value.

The valve mechanism 5 includes a seat surface 6, a valve body 7, and a push rod 8.
, magnet 9, fixed wall 11, and float 1
2. The seat surface 6 is provided at the open end of the gas passage 3. The valve body 7 is
It is a ball-shaped member that is provided below the seat surface 6 and can move toward and away from the seat surface 6 from the pressure vessel 1 side. The valve body 7 is urged in the direction of opening the gas passage 3 by the gravity applied to the valve body 7. The push rod 8 has the valve body 7 placed on a mounting plate 8a at its upper end, and a rod portion 8b hanging downward from the mounting plate 8a.When the push rod 8 slides upward, the valve body 7 is placed on a mounting plate 8a at its upper end. 7 in the direction of the sheet surface 6. The magnet 9 is attached to a magnet receiving portion 8c provided at the lower end of the push rod 8, and moves up and down in conjunction with the push rod 8. The fixed wall 11 is made of a dish-shaped magnetic material fixed to the lower end of the valve box 14 which has a communication port 13 and is continuous with the gas passage 3, and the push rod is inserted into a hole provided in the center of the bottom wall 11a. 8 through the rod portion 8b. And the bottom wall 11a of this fixed wall 11
The plate 8a and the valve body 7 are supported on the upper side. The float 12 has a large diameter and is provided inside the pressure vessel 1, and floats on the liquid surface and moves up and down following changes in the liquid level. The lower end of the push rod 8 is brought into contact with the lower end of the push rod 8 at a position near the set liquid level I, and the push rod 8 is pushed in the valve closing direction, that is, upward. Further, the magnetic strength of the magnet 9 is adjusted so that the magnetic strength between the magnet 9 and the fixed wall 11 is increased when the liquid level reaches the set liquid level, that is, when the float 12 pushes up the push rod 8 by a certain amount. The magnetic attraction force is applied to the valve body 7 and the push rod 8.
The valve body 7 is moved against the seat surface 6 by overcoming the valve opening force consisting of the sum of the gravity and the gravity applied to the magnet 9.
It is set to a value that is pushed to . Further, the communication port 13 allows the gas passage 3 and the gas phase portion 2 to communicate with each other.

With such a configuration, as the pressure liquid A is stored in the pressure vessel 1, the level of the pressure liquid A rises, and the float 12 rises accordingly. At this time, the volume of the gas phase part 2 decreases, and the gas in the gas phase part 2 flows out to the gas cylinder 4. When the liquid level rises to a position close to the set liquid level, the float 12 contacts the lower end of the push rod 8 and presses the push rod 8 upward. When the liquid level rises to a set value, the magnetic attractive force between the magnet 9 and the fixed wall 11 overcomes the valve opening force described above and presses the valve body 7 against the seat surface 6. Therefore, the outflow of the gas in the gas phase part 2 to the gas cylinder 4 is blocked, the gas pressure in the gas phase part 2 increases, and the level of the pressure liquid A stops rising. Further, when the pressure liquid A is drawn out from the pressure vessel 1 and the liquid level falls, the volume of the gas phase part 2 increases as the liquid level decreases, and the volume of the gas phase part 2 increases accordingly. The pressure of the gas decreases. Then, since the sum of the pressure inside the gas cylinder 4 and the above-mentioned valve opening force becomes larger than the above-mentioned magnetic attraction force, the valve body 7 separates from the seat surface 6 and falls onto the fixed wall 11 together with the mounting plate 8a. The gas passage 3 is opened again.

In this way, the gas passage 3 is opened and closed. According to this accumulator, the pressure vessel 1
Since the liquid level in the tank can be directly detected by the float 12, there is no difference between the detected value and the actual liquid level as in conventional systems, and therefore the gas passage 3 can be opened and closed appropriately. can do. Moreover, the valve mechanism 5 connects the gas passage 3 to the valve body 7 by means of the float 12 and the magnet 9.
It has a simple structure in which the gas passage 3 is opened by separating the valve element 7 by the difference between the sum of the gas pressure in the gas cylinder 4 and the valve opening force and the magnetic attraction force. The structure is simpler and the cost is lower than that of conventional electrical methods that open and close gas passages.

It should be noted that the present invention is of course not limited to the above-mentioned embodiments, and the valve opening force that biases the valve body in the opening direction is not limited to the force of gravity applied to the valve body, but can also be generated by the elastic force of an elastic member. good.

Various other modifications can be made without departing from the spirit of the present invention.

[Effects of the invention] As explained above, the present invention can appropriately open and close the valve mechanism in response to level fluctuations in the pressure vessel, so the valve body can be closed when the liquid level suddenly increases. To provide an accumulator which can reliably prevent problems such as the flow of pressurized liquid into a gas tank due to a delay in formation timing, and which has a simple structure and is inexpensive.

[Brief explanation of the drawing]

Fig. 1 is a schematic explanatory diagram showing a conventional example of an accumulator, Figs. 2 and 3 show an embodiment of the present invention, Fig. 2 is a schematic explanatory diagram equivalent to Fig. 1, and Fig. 3 is a main part. FIG. DESCRIPTION OF SYMBOLS 1... Pressure vessel, 2... Gas phase part, 3... Gas passage, 4... Gas cylinder, 5... Valve mechanism, 6... Seat surface, 7... Valve body, 8... Push rod, 9... Magnet, 11...fixed wall, 12...float.

Claims (1)

[Scope of utility model registration request] A pressure vessel for storing pressurized liquid having a gas phase part on the upper end side, a gas cylinder communicating with the gas phase part of this pressure vessel via a gas passage, and a liquid level of the pressure liquid in the pressure vessel being set. In an accumulator comprising a valve mechanism that shuts off the gas passage when the liquid level reaches a liquid level, the valve mechanism is connected to a seat surface provided in the gas passage and from the pressure vessel side with respect to the seat surface. a valve body that is provided so as to be able to approach and separate and is biased in the opening direction by gravity or elasticity;
A push rod for pressing the valve body in the direction of the seat surface, a magnet that advances and retreats in conjunction with the push rod, a fixed wall made of a magnetic material provided at one end of the advancement and retreat path of the magnet on the valve opening side, and and a float that moves up and down following changes in the liquid level in the container and starts pressing the push rod in the valve opening direction when the liquid level rises to a certain amount lower than the set liquid level. , when the float pushes the push rod by a certain amount and the liquid level reaches the set liquid level, the magnetic attraction force between the magnet and the fixed wall overcomes the valve opening force. The accumulator is set to a value that allows the valve body to be pressed against the seat surface.