JPH08200301A - Accumulator - Google Patents

Abstract

PURPOSE: To provide an accumulator which is highly effective in attenuating pulsative pressure. CONSTITUTION: A box A is divided into a first chamber 4 and a second chamber 5 by means of a partition body 3. The first chamber 4 is opened while being communicated with a liquid consumption part 6 and a liquid supplying part 7, to which pulsative pressure of pressurized liquid is applied. Pressurized air is supplied to the second chamber 5. The air has the same pressure as that of the liquid which is supplied to the first chamber 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used for alleviating a pressure fluctuation of a fluid or for alleviating an instantaneous fluctuation of a discharge amount of a pump and a discharge pressure of a pump connected to a discharge pipe of a pump. Accumulators.
For example, as an example of using this accumulator,
In a liquid fuel combustion apparatus, an electromagnetic pump for pressurizing and feeding the fuel and a combustor for burning the fuel are connected and arranged in a fuel flow path.

[0002]

2. Description of the Related Art A conventional accumulator is a real-life type sho 55-
No. 38154. In this accumulator, a diaphragm having elasticity is arranged between an air chamber member and a liquid chamber member, an air chamber sealed by the diaphragm and the air chamber member is formed, and the liquid chamber is formed by the diaphragm and the liquid chamber member. On the other hand, an inflow pipe connected to the electromagnetic pump and an outflow pipe connected to the combustor are opened in the liquid chamber. Then, the fuel discharged from the electromagnetic pump operated intermittently is sent to the liquid chamber through the inflow pipe. Here, the pulsation of the fuel is absorbed by the elasticity of the diaphragm, and the fuel without pulsation is supplied from the outflow pipe to the combustor.

[0003]

According to such a conventional accumulator, although the pulsating pressure is absorbed, it is difficult to greatly attenuate the pulsation. This is what will be made clear in the explanation of the operation of the present invention, but the point is that the air chamber is in a closed state, and even if the diaphragm moves, the gas pressure in this air chamber is the same as the liquid pressure applied to the liquid chamber. This is because it cannot rise to a certain pressure.

The present invention has been made in view of the above problems, and a main object of the present invention is to provide an accumulator capable of greatly reducing pulsating pressure.

[0005]

According to the accumulator of the present invention, the housing is composed of the first chamber and the second chamber in the form of a flat partition.
The first chamber is connected to the liquid consuming unit or the liquid supplying unit, and the pressurized liquid is supplied to the first chamber.
The first feature is that a pressurized gas having a gas pressure of the same pressure as the liquid pressure applied to the first chamber is supplied to the chamber.

In addition to the first characteristic, the accumulator of the present invention has a second characteristic that the flat plate-shaped partition body is formed of fluororubber containing a base cloth.

In addition to the first characteristic, the accumulator of the present invention has a third characteristic in that the flat plate-shaped partition is formed of polyphenylene sulfide.

In addition to the first characteristic, the accumulator of the present invention has a fourth characteristic in that the flat plate-shaped partition body is formed of a thin metal plate.

Further, the accumulator according to the present invention comprises a housing which is divided into a first chamber and a second chamber by a flat plate-shaped partition, and a pressure piston which is slidably arranged in the air cylinder. A gas pressurizing device having a piston operation flow path in the air cylinder on the side, and a pressure flow path in the air cylinder on the other side of the pressurizing piston; and
A liquid inflow path connected to the liquid supply section and a liquid outflow path connected to the liquid consumption section are opened, while a piston operation flow path of the gas pressurizing device is connected and opened to the liquid inflow path, and the pressurization flow path is formed. The fifth feature is that the pressure of the gas applied to the second chamber through the pressurizing flow path is made equal to the pressure of the liquid applied to the first chamber via the connection opening.

[0010]

According to the first feature of the accumulator of the present invention, the pulsation of the liquid is increased by supplying the pressurized gas having the same pressure as the liquid pressure applied to the first chamber into the second chamber. It was able to be attenuated.

According to the second feature of the accumulator of the present invention, since it has excellent chemical resistance, weather resistance and heat resistance, the accumulator disposed near the heat generating portion of the combustor, the internal combustion engine or the like, Alternatively, it is suitable for use as a compartment of an accumulator in which various liquids such as petroleum, gasoline, alcohol, gunhole, oil, etc. are used as the liquid used.

According to the third feature of the accumulator of the present invention, since it has excellent chemical resistance and heat resistance, there is a high degree of freedom in arranging it in the vicinity of the heat generating portion or selecting the liquid to be used. Furthermore, since a partition can be obtained by injection molding, a suitable partition can be provided.

According to the fourth feature of the accumulator of the present invention, the accumulator has a high rigidity and can be made extremely thin, and in particular, it can be used in a state where the liquid pressure is high. Is.

According to the fifth feature of the accumulator of the present invention, the gas pressure having the same pressure as the liquid pressure is generated in the gas pressurizing device by utilizing the pressure of the liquid flowing in the liquid inflow passage. You can Then, by introducing the pressure of the gas generated in the gas pressurizing device into the second chamber, it is possible to introduce the gas pressure of the same pressure as the liquid pressure supplied into the first chamber into the second chamber.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the accumulator according to the present invention will be described below with reference to FIG. A is a casing including a cup-shaped first casing 1 having an open top and a cup-shaped second casing 2 having an open bottom. The flat plate-shaped partition 3 is arranged in the section. The lower surface 3A of the partition 3 and the first housing 1 form a first chamber 4, and the upper surface 3B of the partition 3 and the second housing 2 form a second chamber.
The chamber 5 is sectioned. Then, a pressurized liquid such as petroleum as a fuel is supplied into the first chamber 4 from a liquid supply unit 7 such as an electromagnetic pump.
The liquid therein is supplied toward a liquid consuming unit 6 such as a fuel injection valve, and the liquid consuming unit 6 consumes the liquid such as combustion.

When the electromagnetic pump as the liquid supply section 7 is operated, the discharge pressure of the liquid is periodically changed to generate a pulsating pressure, and this pulsating pressure acts in the first chamber 4. . The flow of the liquid also changes due to the opening / closing operation of the fuel injection valve serving as the liquid consuming unit 6, and the pulsating pressure of the liquid caused by the change also acts in the first chamber 4. That is, the pulsating pressure of the liquid acts in the first chamber 4.

On the other hand, the pressurized gas generated by the gas pressurizing device 8 such as an air pump is supplied into the second chamber 5, and the pressure of the pressurized gas applied to the second chamber 5 is increased. Is preferably kept at the same pressure as the pulsating pressure acting in the first chamber 4.

This was verified by the following test results. In the first chamber 4, a pulsating pressure of a liquid having a pressure of 2.3 kg / cm 2 and a swing width of ± 0.15 kg / cm 2 was applied. On the other hand, gases having different pressures were added into the second chamber 5. For the flat plate-shaped partition body 3, a fluororubber with a base cloth having a plate thickness of 0.8 mm was used. And the second
When the pressure of the gas applied to the chamber 5 was changed variously, the attenuation (corresponding to the swing width) of the pulsating pressure of the liquid in the first chamber 4 was measured and confirmed.

The test results are shown in FIGS. 2 to 11, in which the pressurized gas added to the second chamber 5 and the first gas
The table below summarizes the damping of the pulsating pressure of the liquid in the chamber 4. From the above test results, it is understood that the most effective damping of the pulsating pressure in the first chamber 4 was achieved when the pressure of the pressurized gas applied to the second chamber 5 was 2.3 kg / cm 2. To be done. That is, the pulsating pressure of 2.3 ± 0.15 (kg / cm 2) of the liquid applied in the first chamber 4 is 2.3.
It could be attenuated to +0 to -0.005 (kg / cm2).

On the other hand, the test result shown in FIG.
A liquid having a pressure of 2.3 kg / cm 2 is added to the chamber 5, and the inside of the first chamber 4 is 2.3+
It is 0.0425-0.08 (kg / cm2), and the fluctuation range of the pulsating pressure is 0.1225 (kg / cm2), which is within the second chamber 5 and the first chamber 4. It is understood that the addition of pressurized liquid to the same pressure does not have a pulsating pressure dampening effect.

Next, FIG. 13 to FIG. 22 show test results in another embodiment. In this embodiment, the material of the partition 3 is
Board thickness is different. In the first chamber 4, a pulsating pressure of a liquid having a pressure of 2.3 kg / cm 2 and a swing width of ± 0.15 kg / cm 2 was applied. On the other hand, gases having different pressures were added into the second chamber 5. It should be noted that the flat plate-shaped partition 3 has 0.1
Polyphenylene sulfide with a plate thickness of mm was used. Then, when the pressure of the gas applied to the second chamber 5 was variously changed, the attenuation (corresponding to the swing width) of the pulsating pressure of the liquid in the first chamber 4 was measured and confirmed.

The test results are shown in FIGS. 13 to 22. The following table summarizes the pressurized gas added to the second chamber 5 and the damping of the pulsating pressure of the liquid in the first chamber 4. It becomes like this. From the above test results, it is understood that the most effective damping of the pulsating pressure in the first chamber 4 was achieved when the pressure of the pressurized gas applied to the second chamber 5 was 2.3 kg / cm 2. To be done. That is, the pulsating pressure of 2.3 ± 0.15 (kg / cm 2) of the liquid applied in the first chamber 4 is 2.3.
It was able to be attenuated to +0.0075 to -0.005 (kg / cm2), and it was proved that effective attenuation can be achieved even if at least polyphenylene sulfide is selected as the material of the partition body 3.

The above-mentioned polyphenylene sulfide has high strength and high rigidity, and in particular, its specific elasticity and specific strength are similar to those of metal, so a thin metal plate can be used as the material of the partition 3. In its adoption, by appropriately selecting the plate thickness, it is possible to obtain a pulsating pressure damping effect equivalent to that of fluororubber containing a base cloth and polyphenylene sulfide. For example, a stainless steel plate having a thickness of 0.05 mm is used.

FIG. 23 shows another example of the method of connecting the flow paths of the liquid supply unit 7, the accumulator, and the liquid consumption unit 6, and the other components are the same as those in FIG. 1 and the same reference numerals are used. To do. In FIG. 23, the flow path indicated by the solid line will be described. The liquid pressurized by the liquid supply unit 7 is directly supplied to the liquid consumption unit 6, and the liquid in the liquid consumption unit 6 is the first chamber of the fucumulator. Introduced in 4. Therefore,
The pulsating pressure mainly generated in the liquid consuming portion 6 is introduced into the first chamber 4, and the pulsating pressure is attenuated by the same operation as in the first embodiment.

Further, in FIG. 23, the flow path indicated by the dotted line will be described. A liquid pressurized directly is supplied from the liquid supply section 7 to the liquid consuming section 6, and a flow branched from this flow path is supplied. The passage is connected into the first chamber 4. Therefore, the pulsating pressure mainly generated in the liquid supply unit 7 is introduced into the first chamber 4, and the pulsating pressure is attenuated by the same operation as that of the first embodiment.

FIG. 24 shows still another embodiment. A is a casing including a cup-shaped first casing 1 having an open top and a cup-shaped second casing 2 having an open bottom. The flat plate-shaped partition 3 is arranged in the section. The lower surface 3A of the partition 3 and the first housing 1 form a first chamber 4, and the upper surface 3B of the partition 3 and the second housing 2 form a second chamber 5. Then, in the first chamber 4, a liquid inflow path 10 for feeding the liquid pressurized by a liquid supply section (not shown) into the chamber, and a liquid outflow path 11 connected to a liquid consumption section (not shown). , Opens. In addition, on the upper part of the second housing 2, a cylindrical air cylinder 1 is provided.
2 is bored, and a pressure piston 13 is slidably arranged in the air cylinder 12 in an airtight state.
In this pressurizing piston, a plurality of labyrinth grooves 13A are bored in order to obtain airtightness. And the pressurizing piston 13
A piston operation flow path 12A is formed in the air cylinder 12 on one side 13A, and a pressure flow path 12B is formed in the air cylinder 12 on the other side 13B of the pressure piston 13.
The pressurizing flow path 12B penetrates the second housing 2 to communicate with the inside of the second chamber 5, and the piston operation flow path 12A penetrates the second housing 2 and the first chamber body 1 to the liquid inflow path 10. Be contacted. The gas pressurization apparatus B was formed by the above.

According to the above structure, the liquid pressurized by the liquid supply unit flows into the first chamber 4 through the liquid inflow passage 10, and the liquid consuming unit is discharged from the first chamber 4 through the liquid outflow passage 11. 6 is supplied. Then, in the liquid supply section, the generated pulsating pressure acts on the inside of the first chamber 4. On the other hand, the liquid inflow path 1
The pressurized liquid flowing in 0 passes through the first housing 1 and the second housing 2 to move the piston operation flow path 1 of the air cylinder 12.
2A, according to which one side 1 of the pressure piston 13
3A is the pressurized channel 12 on the left side due to this pressurized liquid.
Pressed toward the B side, the pressurizing piston 13 pressurizes the flow passage 1
Compress 2B. According to the above-described leftward movement of the pressurizing piston 13, the volume of the pressurizing flow path 12B decreases and the pressurizing flow path 12B
The gas pressure in B gradually rises. The pressure piston 13 moves to the left until the pressure P1 applied to one side 13A of the pressure piston 13 and the pressure P2 applied to the other side 13B of the pressure piston 13 become the same pressure. Continue to press. That is, when the pressure of the liquid flowing in the liquid inflow passage 10 is 2.3 (kg / cm2), the pressure is increased when the gas pressure in the pressurizing flow passage 12B rises to 2.3 (kg / cm2). The pushing movement of the piston stops. Then, the pressure of the gas in the pressurizing flow path 12B is introduced into the second chamber 5 via the second housing 2.

Based on the above, the liquid inflow passages 10 to 2.3
The pulsating liquid pressurized to kg / cm2 flows into the first chamber 4, while the gas pressurized to 2.3 kg / cm2 from the pressurized channel 12B to the second chamber 5 is the second. It acts in the chamber 5. Therefore, since the pressure of the liquid applied to the first chamber 4 and the pressure of the gas applied to the second chamber 5 can be maintained at the same pressure, the liquid can be maintained in the same manner as in the first embodiment. The pulsating pressure of was able to be effectively attenuated.

In this embodiment, the pressure increase of the gas applied to the second chamber 5 is caused by the gas pressurizing device B operated by the pressure of the liquid flowing in the liquid inflow passage 10, Since pressurized gas is used, there is no need to prepare a special drive source such as electricity, and its implementation is extremely easy. Further, since the gas pressurizing device B is integrally arranged in the second housing 2, the number of parts particularly relating to piping and the number of assembling steps can be reduced, and a compact accumulator can be provided. The gas pressurizing device B does not necessarily have to be integrated with the second housing 2. In short, the pressure of the liquid flowing through the liquid inflow passage 10 may be used to operate the gas pressurizing device B to increase the pressure of the gas to the same pressure as the liquid.

[0030]

As described above, according to the first aspect of the present invention, the first chamber partitioned by the partition body is opened in connection with the liquid consuming portion or the liquid supplying portion and is pressurized. Is supplied to the second chamber, pressurized gas is supplied to the second chamber, and the pressure of the liquid in the first chamber and the pressure of the gas in the second chamber are maintained at the same pressure state. It is possible to provide an accumulator with a high damping effect because the pulsating pressure can be greatly damped. According to the second aspect,
Since the partition was made of fluororubber with base cloth,
It is possible to provide an accumulator having excellent chemical resistance, weather resistance, and heat resistance, and in particular, since a seal ring for keeping the first chamber and the second chamber in an airtight state is formed in the partition body itself, No special sealing member is required to maintain airtightness. According to the third aspect of the present invention, since the partition body is formed of polyphenylene sulfide, it has the same specific elasticity and specific strength as those of the metal material, as well as excellent fatigue characteristics and creep resistance, and the operating temperature range is Since it can be used in a high temperature range of 200 ° C. to 220 ° C. and has chemical resistance comparable to that of a fluororesin, the degree of freedom in use can be further increased. Further, since it is a thermoplastic resin material, its production can be extremely easily obtained by injection molding, and in particular, the productivity can be improved as compared with a rubber material. Further, according to the fourth aspect, since the partition body is formed of a thin metal plate, it is suitable as a high pressure type accumulator in which the liquid pressure greatly increases. Furthermore,
According to the fifth aspect of the present invention, the gas pressurizing device is operated by the pressurized liquid applied in the first chamber to generate the pressurized gas pressure, and the pressurized gas is introduced into the second chamber. It is a thing. Therefore, since it is not necessary to operate the gas pressurizing device by a special drive source such as electricity, it is possible to easily carry out the operation especially in a device having no gas pressurizing source.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an embodiment of an accumulator according to the present invention.

[FIG. 2] The first section uses a fluororubber with a base cloth as a partition body.
FIG. 6 is a diagram showing the relationship between pressure and time in the first chamber when a pulsating pressure of liquid of 2.3 kg / cm 2 is applied to the chamber and a gas pressure of 1.0 kg / cm 2 is applied to the second chamber.

FIG. 3 is a diagram showing the first section using a fluororubber containing a base cloth as a compartment.
FIG. 6 is a diagram showing the relationship between pressure and time in the first chamber when a pulsating pressure of liquid of 2.3 kg / cm 2 is applied to the chamber and a gas pressure of 1.5 kg / cm 2 is applied to the second chamber.

FIG. 4 is a diagram showing the first section using a fluororubber containing a base cloth as a compartment.
FIG. 4 is a diagram showing the relationship between pressure and time in the first chamber when a pulsating pressure of liquid of 2.3 kg / cm 2 is applied to the chamber and a gas pressure of 2.0 kg / cm 2 is applied to the second chamber.

[FIG. 5] First, using a fluororubber containing a base cloth as a partition,
FIG. 6 is a diagram showing a relationship between pressure and time in the first chamber when a pulsating pressure of a liquid of 2.3 kg / cm 2 is applied to the chamber and a gas pressure of 2.1 kg / cm 2 is applied to the second chamber.

FIG. 6 is a diagram showing the first section using a fluororubber containing a base cloth as a compartment.
The figure which shows the relationship between the pressure in a 1st chamber, and the time in the state which applied the gas pressure of 2.2 kg / cm2 to a 2nd chamber, when the pulsating pressure of 2.3 kg / cm2 of liquid was applied to a chamber.

[FIG. 7] The first section is made of fluororubber containing a base cloth as a partition body.
The figure which shows the relationship between the pressure in a 1st chamber, and the time in the state which applied the gas pressure of 2.3 kg / cm2 to a 2nd chamber, when the pulsating pressure of a 2.3 kg / cm2 liquid is applied to a chamber.

FIG. 8 is a diagram showing the first section using a fluororubber containing a base cloth as a partition body.
The figure which shows the relationship between the pressure and the time in a 1st chamber in the state which applied the gas pressure of 2.4 kg / cm2 to a 2nd chamber, when the pulsating pressure of a 2.3 kg / cm2 liquid is applied to a chamber.

FIG. 9 is a diagram showing the first section using a fluororubber containing a base cloth as a compartment.
FIG. 6 is a diagram showing the relationship between pressure and time in the first chamber when a pulsating pressure of liquid of 2.3 kg / cm 2 is applied to the chamber and a gas pressure of 2.5 kg / cm 2 is applied to the second chamber.

[Fig. 10] Using fluororubber with a base cloth as a compartment, when a pulsating pressure of a liquid of 2.3 kg / cm2 was applied to the first chamber, a gas pressure of 2.7 kg / cm2 was applied to the second chamber. FIG. 6 is a diagram showing a relationship between pressure and time in the first chamber in a state.

FIG. 11: Using fluororubber with base cloth as a compartment, when a pulsating pressure of 2.3 kg / cm 2 of liquid was applied to the first chamber, a gas pressure of 3.0 kg / cm 2 was applied to the second chamber. FIG. 6 is a diagram showing a relationship between pressure and time in the first chamber in a state.

[Fig. 12] A fluororubber containing a base cloth was used as a compartment, and when a pulsating pressure of 2.3 kg / cm2 of liquid was applied to the first chamber, a liquid pressure of 2.3 kg / cm2 was applied to the second chamber. FIG. 6 is a diagram showing a relationship between pressure and time in the first chamber in a state.

[Fig. 13] Fig. 13 is a view showing a state where a gas pressure of 1.0 kg / cm2 is applied to the second chamber when a pulsating pressure of 2.3 kg / cm2 of liquid is applied to the first chamber using polyphenylene sulfide as a compartment. The diagram which shows the relationship between the pressure in one room, and time.

FIG. 14 is a diagram showing a state in which a gas pressure of 1.5 kg / cm 2 is applied to the second chamber when a pulsating pressure of a liquid of 2.3 kg / cm 2 is applied to the first chamber using polyphenylene sulfide as a compartment. The diagram which shows the relationship between the pressure in one room, and time.

[Fig. 15] Fig. 15 is a view showing a state in which a gas pressure of 2.0 kg / cm2 is applied to the second chamber when a pulsating pressure of a liquid of 2.3 kg / cm2 is applied to the first chamber using polyphenylene sulfide as a compartment. The diagram which shows the relationship between the pressure in one room, and time.

[Fig. 16] Fig. 16 is a view showing a state in which a gas pressure of 2.1 kg / cm2 is applied to the second chamber when a pulsating pressure of 2.3 kg / cm2 of liquid is applied to the first chamber using polyphenylene sulfide as a compartment. The diagram which shows the relationship between the pressure in one room, and time.

[Fig. 17] Fig. 17 is a view showing a state in which a gas pressure of 2.2 kg / cm2 is applied to the second chamber when a pulsating pressure of a liquid of 2.3 kg / cm2 is applied to the first chamber using polyphenylene sulfide as a compartment. The diagram which shows the relationship between the pressure in one room, and time.

[Fig. 18] Fig. 18 is a graph showing a state in which a gas pressure of 2.3 kg / cm2 is applied to the second chamber when a pulsating pressure of a liquid of 2.3 kg / cm2 is applied to the first chamber using polyphenylene sulfide as a compartment. The diagram which shows the relationship between the pressure in one room, and time.

FIG. 19 is a diagram showing a state in which a gas pressure of 2.4 kg / cm 2 is applied to the second chamber when a pulsating pressure of liquid of 2.3 kg / cm 2 is applied to the first chamber using polyphenylene sulfide as a compartment. The diagram which shows the relationship between the pressure in one room, and time.

[Fig. 20] Fig. 20 is a graph showing a state in which a gas pressure of 2.5 kg / cm2 is applied to the second chamber when a pulsating pressure of 2.3 kg / cm2 of liquid is applied to the first chamber using polyphenylene sulfide as a compartment. The diagram which shows the relationship between the pressure in one room, and time.

[Fig. 21] Fig. 21 is a graph showing a state in which a gas pressure of 2.7 kg / cm2 is applied to the second chamber when a pulsating pressure of a liquid of 2.3 kg / cm2 is applied to the first chamber using polyphenylene sulfide as a compartment. The diagram which shows the relationship between the pressure in one room, and time.

[Fig. 22] Fig. 22 is a view showing a state where a gas pressure of 3.0 kg / cm2 is applied to the second chamber when a pulsating pressure of a liquid of 2.3 kg / cm2 is applied to the first chamber using polyphenylene sulfide as a compartment. The diagram which shows the relationship between the pressure in one room, and time.

FIG. 23 is a vertical sectional view showing another embodiment of the accumulator according to the present invention.

FIG. 24 is a vertical sectional view showing still another embodiment of the accumulator according to the present invention.

[Explanation of Codes] 3 Compartments 4 1st Chamber 5 2nd Chamber 6 Liquid Consumption Section 7 Liquid Supply Section 10 Liquid Inflow Channel 11 Liquid Outflow Channel 12 Air Cylinder 12A Piston Operation Flow Channel 12B Pressurization Flow Path 13 Pressurization Piston

Claims (5)

[Claims] 1. A housing A is divided into a first chamber 4 and a second chamber 5 by a flat plate-shaped partition body 3, and inside the first chamber 4, a liquid consuming portion 6 or a liquid supplying portion 7 is provided. The pressurized liquid is supplied to the second chamber 5, while the pressurized gas having the same gas pressure as the liquid pressure applied to the first chamber 4 is supplied into the second chamber 5. Characteristic accumulator. 2. The accumulator according to claim 1, wherein the flat plate-shaped partition body 3 is formed of fluororubber containing a base cloth. 3. The accumulator according to claim 1, wherein the flat plate-shaped partition body 3 is formed of polyphenylene sulfide. 4. The accumulator according to claim 1, wherein the flat plate-shaped partition body 3 is formed of a thin metal plate. 5. A housing A divided into a first chamber 4 and a second chamber 5 by a flat partition 3 and a pressure piston 13 slidably arranged in an air cylinder 12. One side 13A
The air cylinder 12 of the pressurizing piston 13 is provided with the piston operation flow path 12A in the air cylinder 12 of the other side 13B.
2, a gas pressurizing device B having a pressurizing flow path 12B inside, and a liquid inflow path 10 connected to the liquid supply section 7 and a liquid outflow path 11 connected to the liquid consuming section 6 in the first chamber 4. When,
On the other hand, the piston operation flow passage 12A of the gas pressurizing device B is connected and opened to the liquid inflow passage 10, and the pressurization flow passage 12B is connected to and opened in the second chamber 5.
The pressure of the gas applied to the second chamber 5 via
An accumulator characterized in that the pressure of the liquid applied into the chamber 4 is made equal.