JPH0114443B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION A. Object of the Invention (Field of Industrial Application) The present invention is a magnetic valve braking device for use in an accumulator that accumulates, buffers, etc. a pressurized liquid.
More specifically, the present invention relates to a device that improves the efficiency and safety of an accumulator by utilizing the characteristics of a magnet that stops a poppet valve within a set value but releases it when the set value is exceeded.

(Prior Art) Conventionally, as shown in FIG. 1 of the drawings, a container main body 1 has a gas chamber a filled with gas from an air supply means 3 by a bladder 2, and a gas chamber a into which liquid is supplied and discharged from a supply/discharge port 4. In an Akimura system in which a poppet valve 5 is provided at the bottom of the bladder 2 to open and close the liquid supply/discharge port 4, and the liquid supply/discharge port 4 is fully opened, the coil can be opened from the opening of the bladder 2. A spring 6 is suspended, and a receiver 7 attached to the inner bottom of the bladder 2 is connected to the tip of the coil spring 6, so that when liquid is discharged from the container body 1 and the bladder 2 is expanded, the coil spring 6 is stretched. Re,
Since its elasticity provides resistance to closing of the poppet valve 5, it is designed to prevent the poppet valve 5 from closing while the liquid is being discharged, thereby preventing liquid entrapment and bladder entrapment.

(Problem to be Solved by the Invention) However, in the valve braking using the spring 6 of the conventional accumulator described above, when liquid is discharged, the elasticity of the spring 6 provides resistance to closing the poppet valve 5 and releases the poppet valve 5. During this period, the bladder 2 should be inflated diametrically and, after sufficient inflation, the poppet valve 5 should be closed; however, if the poppet valve 5 is lowered to close,
Correspondingly, the elasticity of the spring 6 becomes stronger and the closure of the poppet valve 5 is slowed, so that during this time the bladder 2 expands as shown by the chain line in Figure 2 and wraps around the poppet valve 5. There was a problem that the valve 5 closed and the bladder became jammed.

The present invention was made with the aim of solving the above-mentioned problems of the conventional art.The poppet valve attached to the bladder attracts and holds two objects when it is below a set value, but when the set value is exceeded, two objects are held together. By using a magnetic adsorption means that separates objects, the ideal valve closing operation of the poppet valve is performed, and the accumulator is completely prevented from trapping liquid in the accumulator and from being caught in the bladder. The object of the present invention is to provide a magnetic valve damping device for use in the present invention.

B. Structure of the Invention (Means for Solving the Problems) The magnetic valve braking device used in the accumulator according to the present invention has a bladder 1 inside the container main body 9.
0 into a gas chamber a into which gas is sealed from the air supply means 11 and a liquid chamber b into which liquid is taken in and out through an inlet and outlet port 12, and the inlet and outlet port 12 is opened and closed at the bottom of the bladder 10. In an accumulator in which a poppet valve 13 is provided and the supply/discharge port 12 is fully opened,
A stopper 17 provided inside the bottom of the bladder 10
A magnetic adsorption member is attached to the tip of a retaining rod 19 extending vertically from the opening of the bladder 10 toward the stopper 17, which stops the poppet valve 13 when the value is within a set value and releases it when the set value is exceeded. The above-mentioned conventional problems are solved by the configuration in which the means 27 is installed.

(Function) The magnetic valve braking device of the present invention configured as described above introduces liquid into the main body 9 of the container against the gas enclosed in the bladder 10, and moves the bladder 10 as shown in FIG.
When the bladder 10 is contracted as shown in the figure, the stopper 17 provided inside the bottom of the bladder 10 approaches the holding rod 19, and as a result, the magnets m and m or the magnet m and the magnetic material m' are attracted and engaged. The stop portion 17 is held by the holding rod 19.
However, for example, 3
When the liquid is released at a flow rate of about /sec, the bladder 10 tends to expand in the length direction and diameter direction, but the expansion in the length direction is caused by the magnets m and m.
Otherwise, the bladder 10 expands exclusively in the diametrical direction and comes into close contact with the container main body 9 because it is prevented by the attraction force between the magnet m and the magnetic body m'.

However, even if the bladder 10 is in close contact with the container main body 9, if the poppet valve 13 continues to be released,
Since the bladder 10 expands as in the conventional case and envelops the poppet valve 13, the magnet m
If the magnetic force of the magnet m is set so that the attraction between the magnet m and the magnetic body m' is released and the restraining part 17 is released, then when the bladder 10 is sufficiently expanded in the diametrical direction, The poppet valve 13 closes while discharging the fluid so as not to trap the liquid in the container main body 1 and to prevent the bladder 10 from becoming jammed.

In this device, a guide 18 is attached to the stop portion 17 of the bladder 10 as shown in FIGS. 3 to 5 of the drawings.
, and insert this guide 18 into the sliding hole 2 of the holding rod 19.
6, the bladder 10 is allowed to expand and contract while remaining concentric with the container main body 9, and malfunctions due to misalignment of the magnetic attraction means 27 are prevented, resulting in reliable operation. In addition, as shown in FIG. 5, one of the holding rods 19 side of the magnetic attraction means 27 is configured with a large number of magnets m superimposed, and a guide 18 magnetized by the magnets m is arranged. Inserting the stopper 17 not only attracts and holds the stopper 17, but also moves the guide 18 to the center of the large number of overlapping magnets m when the stopper 17 leaves the holding rod 19 and descends to close the poppet valve 13. Since a pulling force is exerted, this force is used as an opening force for the poppet valve 13, and the valve can be opened quickly when introducing liquid.

(Example) Next, a magnetic valve braking device used in an accumulator according to the present invention will be explained based on the drawings.

In Fig. 2 of the drawings, 9 is the main body of the container of the accumulator that employs this device, which is made of a rigid material such as steel to have a pressure-resistant structure, and its interior is made of a deformable material such as rubber, and the opening is made airtight. An air supply means 11 is supplied by a bladder 10 attached to the main body 9 of the container.
a gas chamber a which is filled with gas, and an air supply/exhaust port 12
It is divided into a liquid chamber b into which liquid enters and exits.

Reference numeral 13 denotes a poppet valve attached to the bottom of the bladder 10, and when the bladder 10 extends and approaches the supply/discharge port 12, the valve seat 1 provided at the inner end of the supply/discharge port 12 opens.
4 and closes the supply/discharge port 12.

Reference numeral 15 denotes an umbrella-shaped cushion material which is interposed between the poppet valve 13 and the bottom of the bladder 10, and which protrudes downward from the lower surface of the poppet valve 13 on the lower side of its outer periphery, and which closes the container before the poppet valve 13 is closed. This is to relieve the shock of closing the valve when it hits the main body 9, and a liquid passage groove 16 is formed on the outer periphery to prevent adsorption to the main body 9 of the container.

17 is a bladder 10 corresponding to the poppet valve.
A guide 18 of the magnetic material is provided protruding upward from the center of the stopper of the magnetic material, which is usually attached to the magnetic material, or
Alternatively, this guide 18 may be omitted.

Reference numeral 19 denotes a holding rod for the stopper 17 provided in the bladder 10, and the flange portion 21 of the mounting rod 20 provided at the upper end is connected to the flange 23 of the bladder 10 supported by the stepped portion 22 of the container main body 9, and the flange 23 of the bladder 10 supported by the step portion 22 of the container main body 9. The container main body 9 is sandwiched between the presser edge 25 of the lid metal 24 and the container main body 9.
The tip of this holding rod 19 is attached to the stopper 1.
7, and the guide 18 is installed upright on this stopping portion 17, the sliding hole 2 into which this guide 18 fits
6 is provided.

Reference numeral 27 denotes a magnetic adsorption means constituted by a pair of magnets m and m attached to the holding rod 19 and the stopper 17 correspondingly, or a magnet m and a magnetic material m', as shown in FIG. As shown in , magnets m and m or the third
As shown in the figure, the magnet m and the magnetic material m' may be in direct contact with each other, but as shown in FIG. The magnets may be mounted so as to be slightly retracted from the edges of the case 28, 28 so that the magnetic force is concentrated on the periphery of the case 28, 28, or a large number of magnets m may be mounted on the side of the holding rod 19 as shown in Figure 5 of the drawing. Correspondingly, a magnet m or a magnetic material m' is attached to the stopper 17 side, and the guide 18 erected at the center of the stopper 17 is made of a magnetic material, and the poppet valve 13 is lowered and closed. At this time, if the guide 18 is placed so that it does not come off the overly installed magnet m, this guide 18 will exert a force to pull the overly installed magnet m back to the center, and the poppet valve 1 will be
Valve closing force can be applied to 3.

Reference numeral 29 denotes a liquid passage groove provided in the poppet valve 13 described above, which is provided in the diametrical direction and the circumferential direction.
Even when the liquid passage groove 29 is closed, the liquid is discharged through the liquid passage groove 29.

Reference numeral 30 denotes a check valve provided on the holding rod 19, which opens when the poppet valve 13 is closed and the guide 18 suddenly descends to supply gas to the sliding hole 26.

C. Effects of the Invention The magnetic valve braking device according to the present invention uses a magnetic adsorption means to stop the poppet valve while the bladder expands in the diametrical direction, and releases the valve after the bladder has fully expanded. The valve closes during the discharge of the liquid, preventing the liquid from being trapped in the main body of the container.

When the bladder expands in the diametrical direction and comes into close contact with the main body of the container, the poppet valve is released, and after closing, the bottom of the bladder is brought into contact with the main body of the container, thereby preventing the bottom of the bladder from being caught between the poppet valve and the valve seat. is prevented.

A poppet valve is attached to the bottom of the bladder, eliminating the need for a valve or its support mechanism from the liquid supply/discharge port, so even when used for pressure accumulation and buffering of liquids that contain contaminants, the contaminants do not get stuck in the supply/discharge port. Therefore, there is no functional deterioration or failure due to this, and the liquid flow resistance at the supply/discharge port is small, making it difficult for turbulence to occur.

It has the following unique effects.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional front view of an accumulator using a conventional spring-type valve braking device. FIG. 2 is a partially vertical front view of an accumulator using a magnetic valve braking device according to the present invention. FIGS. 3 to 5 are enlarged longitudinal sectional side views showing each example of the magnetic valve braking device described above. In the figure, 9 is the main body of the container, 10 is the bladder, and 11
12 is an air supply means, 12 is a gas chamber, b is a liquid chamber, 13 is a poppet valve, 17 is a stopper, 19 is a holding rod, and 27 is a magnetic adsorption means.

Claims (1)

[Claims] 1 The interior of the main body of the container is divided into a gas chamber filled with gas from an air supply means by a bladder and a liquid chamber into which liquid is introduced and taken out from an air supply/discharge port, and the supply/discharge port is opened and closed at the bottom of the bladder. In an accumulator which is provided with a poppet valve and whose supply/discharge port is fully opened, a stop portion provided inside the bottom of the bladder, and a tip of a retaining rod extending vertically from the opening of the bladder toward the stop portion, A magnetic valve braking device for use in an accumulator, characterized in that it is equipped with a magnetic adsorption means that stops the poppet valve when it is within a set value and releases it when it exceeds the set value.