WO2003002876A1

WO2003002876A1 - Booster

Info

Publication number: WO2003002876A1
Application number: PCT/JP2002/006281
Authority: WO
Inventors: Yukihiko Karasawa
Original assignee: Karasawa Fine., Ltd
Priority date: 2001-06-27
Filing date: 2002-06-24
Publication date: 2003-01-09
Also published as: JP2003013904A; TW568982B

Abstract

A booster allowing a pump to be reduced in size, eliminating the need of a selector valve, and emitting less noise, comprising two booster units (5, 5') and pressure pumps (11, 11') for feeding low pressure side fluid (A) to the booster units, the booster units further comprising a low pressure side cylinder (53) and a high pressure side cylinder (54), wherein the low pressure cylinder is divided into a primary side space (53a) and a secondary side space (53b) by a low pressure side piston (55a), the low pressure side piston is formed integrally with a high pressure side piston (55b), the pressure pump (11) is allowed to rotate in forward and reverse directions and connected to the primary side space of the low pressure side cylinder, and the secondary spaces of the low pressure side cylinders are connected to a pressurizer (13), whereby, when the pressure pump (11) is rotated in forward direction, the fluid (A) is fed to the primary side space (53a) to pressurize fluid (B) in the high pressure side cylinder (54) and, when the pressure pump (11) is reversely rotated, gas is fed from the pressurizer (13) to the secondary side space (53b) to raise the piston (55) so as to suck the fluid (B) into the high pressure side cylinder (54).

Description

Details

Booster device technical field

The present invention relates to a pressure intensifier for increasing the pressure of a fluid, and more particularly to a pressure intensifier suitable for a device in which a fluid having a high pressure is ejected from an opposed nozzle and the ejected fluids collide with each other. Background art

When emulsifying a mixture of multiple immiscible liquids, such as water and oil, or atomizing solid particles in a slurry, these fluids are pressurized and ejected from opposing nozzles. There is known a method in which fluids collide with each other to make particles smaller.

FIG. 2 is a simplified view of the overall configuration of such a system for refining particles. In the figure, A is the low-pressure side fluid and B is the high-pressure side fluid.For convenience, the pipeline through which the low-pressure side fluid A flows is shown by a solid line, and the pipeline through which the high-pressure side fluid B flows is shown by a dotted line. I have.

Oil is stored in the tank 1 as the low-pressure side fluid A. This low-pressure fluid A is pumped by the pressure pump 2. The low-pressure side fluid A discharged from the pressure pump 2 is adjusted to a predetermined pressure by the regulator 3 and reaches the two switching valves 4, 4. Excess fluid of low-pressure fluid A that reaches regulation 3 is returned to tank 1 by the relief valve in regulation 3.

Each switching valve 4, 4 ^5, the discharge conduit of each it it two are connected. The switching valves 4 and 4 ′ can be switched to either a state in which the low-pressure side fluid A is supplied to one of these pipelines, or a closed state in which the low-pressure side fluid A is not supplied to either of them. Discharge conduit connected to the switching valve 4 is connected to the intensifier 5, a discharge conduit connected to the switching valve 4 'is connected to the intensifier 5 ^5.

FIG. 3 is an enlarged sectional view of the pressure intensifier 5. The pressure intensifier 5 is a stack of two upper and lower cases 51 and 52. Inside the lower pressure cylinder 53 and the high pressure cylinder 54 There are two cylindrical spaces. A piston 55 is fitted inside these. The piston 55 is made up of a large-diameter piston and a small-diameter piston, and is shaped like a disk with a round bar. The disk portion is a large-diameter piston, that is, a low-pressure piston 55a, which divides the low-pressure cylinder 53 into a primary space 53a and a secondary space 53b. The portion of the round bar is a small diameter piston, that is, the high pressure side piston 55b, which moves in the high pressure side cylinder 54.

When the pressure pump 2 operates and the low-pressure side fluid A is supplied to the primary space 53a, and the pressure of the primary space 53a rises, the piston 55 moves in the direction of the arrow a, and the high-pressure cylinder 5 Pressurize the high-pressure fluid B in 4 and push it out. When the switching valve 4 is switched and the low-pressure fluid A flows into the secondary space 53b, and conversely, the pressure in the secondary space 53b rises, the piston 55 moves in the direction of the arrow b and the high-pressure side Suction high-pressure fluid B into cylinder 54.

The cross-sectional area of the low-pressure side cylinder 53 and the cross-sectional area of the high-pressure side cylinder 54 are the inverse ratio of the pressure increase ratio of the pressure booster 5. For example, if the pressure increase ratio is 20 times, the sectional area of the high-pressure cylinder 54 is 1 Z20 which is the sectional area of the low-pressure cylinder 53.

'Because it is exactly the same structure as also增圧machine 5, the other intensifier 5 to indicate the corresponding configuration of the intensifier 5 ⁵ denoted by the "'". For example, 55a 'indicates the low pressure side piston of intensifier 5', and so on.

Returning to Figure 2, one on the primary side space 5 3 a, 5 3 a ^5, is connected to one of the switching valve 4, 4 ⁵ discharge conduit of the secondary space 5 3 b, 5 3 b 'is The other end of the discharge line is connected. The high pressure side cylinders 54, 54 'are connected to the pipeline of the high pressure side fluid B, which are connected to the check valves 6, 6, respectively. The check valves 6 and 6 ′ are configured such that the fluid flows in the direction of the arrow in the figure but does not flow in the reverse direction.

The high-pressure side fluid B is stored in the tank 7. The high-pressure fluid B refers to a mixture of a plurality of immiscible liquids, such as water and oil, and various slurries. The high-pressure side fluid B in the tank 7 reaches the air pump 8 through a pipe extending from below the tank 7, is sent out by the air pump 8, and is divided into two pipes. To reach check valves 6, 6,.

If the pistons 55, 55 'descend and the intensifiers 5, 5, 5 are pressurized, the high-pressure fluid B from the air pump 8 cannot pass through the check valves 6, 6'. the piston 5 5, 5 5, intensifier 5 rises, 5 if ⁵ is being reduced pressure, the higher the direction of pressure of the high-pressure side fluid B of the air first pump 8 side, the high pressure side fluid B is the high pressure side cylinder Enter into 5, 4, 5 and.

Reference numeral 9 denotes a jet impingement portion where the jet of the high-pressure fluid impinges. Details of the configuration here are described in Japanese Patent Application Laid-Open No. 6-472264. To explain the point, check valve 6, 6 ⁵ high pressure fluid came through the can, in the jet impingement portion 9, is split into two flow paths, provided opposite to each flow path terminal Injected from nozzles 91 and 91. When the fluid ejected from one nozzle collides with the fluid ejected from the other nozzle, the particles contained in the slurry are pulverized or the water and oil particles become finer and become emulsified. become.

The high-pressure side fluid B collided in the jet impingement section 9 returns to the ink tank 7 again, circulates and is repeatedly collided until the desired emulsification degree and particle diameter are reached.

In the above configuration, the two boosters 5, 5 'are used because the high-pressure side fluid B is alternately pressurized by these boosters, and the jet impingement section 9 always collides the jet. That is to be done. Problems of the Invention

In the case of pressurizing the high-pressure side fluid B is driven alternately intensifier 5, 5 ⁵ two pressure pump 2, the end pressurization of one of the intensifier, the pressure of the next intensifier starts If pressure is not applied during this period, pulsation occurs in the high-pressure fluid B. The pulsation becomes a pressure fluctuation when the nozzle 91 emulsifies or atomizes. That is, the flow velocity at the nozzle 91 is temporarily reduced, and the crushing ability at the time of collision is reduced, so that a uniform emulsion or fine particles cannot be obtained.

Therefore, conventionally, pulsation was suppressed by starting pressurization of the other intensifier before the end of pressurization of the one intensifier and overlapping the pressurization time of both. Incidentally, the high-pressure fluid B to be increased in pressure is generally an incompressible fluid, but is in a high-pressure region. Thus, even if it is an incompressible fluid, the compressibility is not negligible (the compressibility of water at 200 MPa is about 8.5%). Therefore, the above-mentioned over-wrapping time also requires a time for compressing the high-pressure side fluid B, which is prolonged accordingly. For such a reason, the pressure pump 2 needs a discharge pressure and a discharge amount capable of simultaneously increasing the pressures of the two pressure intensifiers 5 and 5 ′, and the pressure pump 2 has been increased in size.

Conversely, while only one of the pressure intensifiers is pressurizing, excess low-pressure side fluid A is discharged from the pressure pump 2, so that there is waste. The low-pressure side fluid A discharged from the pressure pump 2 is returned to the ink tank 1 from the relief valve of the regulator 3 at night, but the energy added when pressurized is converted to heat energy. Since the temperature of tank 1 continues to rise in order to be returned to tank 1, it is necessary to provide a cooler in the middle to cool it. This cooler is wasteful because the returned flow is large and the cooler is also large.

Further, the switching valve 4, 4 ^5, is a Sorenoido valve, loud sound when switching occurs, causing noise.

The present invention has been made in view of the above facts, and has as its object to provide a pressure intensifier capable of reducing the size of a pump and reducing pulsation during switching. Another object of the present invention is to provide a pressure increasing device which does not require a switching valve, has low noise, and has high durability. Disclosure of the invention

In order to achieve the above object, a pressure booster of the present invention includes a plurality of pressure boosters and a plurality of pumps for supplying a low-pressure side fluid for driving to the pressure boosters, wherein one of the pumps is a plurality of the plurality of pressure boosters. One of the boosters is supplied with the low-pressure side fluid, and the other pressure boosters are combined with the pumps so that the low-pressure side fluid is not supplied.

The pressure intensifier includes a low pressure side cylinder, a high pressure side cylinder, a low pressure side piston that divides the low pressure side cylinder into a primary space and a secondary space, and the high pressure side formed integrally with the low pressure side piston. The pump has a high-pressure side piston that moves forward and backward in the cylinder, and each of the pumps is rotatable forward and backward.The pump is connected to the primary space of each of the low-pressure cylinders. Connected to two or more pressurizers be able to.

The pump may be provided in the low-pressure side fluid, or the intensifier may be

Two high pressure side cylinders of both boosters are connected to both ends of a first check valve group and a second check valve group arranged in parallel, and the first check valve group is connected to both high pressure side cylinders. The second check valve group is connected in such a direction as to allow the flow from the high pressure side fluid from the middle to the high pressure side fluid. Can be supplied. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a diagram showing a configuration of a pressure booster of the present invention, FIG. 2 is a diagram showing a configuration of a conventional pressure booster, and FIG. 3 is a cross-sectional view showing a configuration of a pressure booster. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a diagram showing a configuration of a pressure booster of the present invention. The same components as those of the conventional example, such as the pressure intensifiers 5 and 5 ′, the air pump 8, and the jet impingement section 9, are denoted by the same reference numerals and description thereof is omitted.

The tanks 10 and 10 ′ are filled with the low-pressure side fluid A. Tank 10 has a pressure pump 11, and tank 10 ′ has a pressure pump 11 ′, which is immersed in the liquid. Incidentally, the tank 1 0, 1 0 ⁵ need not be divided into two tanks, two pressure pumps 1 1 in a single tank, 1 1 may be immersed. Also, as the pressure pump 1 1, 1 I ^5, by making crushed immersed in oil as the low-pressure side fluid A, it is possible to downsize and soundproofing spoon pressure pump. The use of a hydraulic pressure-intensifying high-pressure pump in an explosion-proof area is based on the requirement of explosion-proof or intrinsically safe explosion-proof. Except for the above, there is an advantage that this necessity is inevitably eliminated because all the points where sparks such as electric contacts are present in the hydraulic oil.

The discharge port of the pressure pump 11 is connected to the primary space 5 3 a of the low-pressure cylinder 5 3 of the booster 5. The discharge port of the pressure pump 11 1 ′ is connected to the low-pressure cylinder 5 3 ′ of the pressure booster 5. It is connected to the primary side space 53 a ^5. The discharge pressures of the pressure pumps 11, 11 'are monitored by pressure gauges 12, 12, and are controlled by a control device (not shown) so as to reach a predetermined pressure.

The secondary spaces 53b, 53b 'of the low-pressure cylinders 53, 53' are connected to the pressurizer 13. In the embodiment of the present invention, an accumulator in which gas and fluid are sealed is used as the pressurizer 13. However, a third pressure pump can be used as the pressurizer 13.

To lower the piston 55 of the intensifier 5, the pressure pump 11 is rotated in the forward direction, and the low-pressure side fluid A is sent to the primary space 53 a of the intensifier 5 while monitoring the discharge pressure with the pressure gauge 12. As a result, the piston 55 descends, and the high-pressure fluid B in the high-pressure cylinder 54 is pressurized to a high pressure and sent out. Further, the gas contained in the secondary space 53b is compressed and stored in the pressurizer 13.

To raise the piston 55 of the pressure intensifier 5, the pressure pump 11 is rotated in the opposite direction. As a result, the low-pressure side fluid A filling the primary space 53a is extracted. The piston 55 is raised by the negative pressure at the time of the removal. Further, since the pressure in the secondary space 53b decreases, the fluid that has entered the pressurizer 13 is pushed by the gas and returns here, and pushes up the piston 55.

The above operation is the same when the piston 55 'of the intensifier 5 is raised and lowered.

The pressure intensifier 5 and the pressure intensifier 5 are arranged such that the pressure intensification of the high pressure side fluid B and the pressure fluctuation of the high pressure side fluid B start immediately before the compression stroke of the high pressure side fluid B in one of the pressure intensifiers ends. Pulsation is prevented from occurring. Therefore, the pressurizer 13 generally repeats the state of receiving the compressed gas from the secondary space of one of the pressure intensifiers and supplying the gas to the other secondary space while reversing the state.

In the above structure is connected only by a single conduit to the pressure intensifier 5, 5 ⁵ and the pressure pump 11, 11 ', the hydraulic circuit is simplified. In addition, since a switching valve is not required, the sound generated at the time of switching has been eliminated. Also, since the pipe length is shortened, it is possible to set the operating hydraulic pressure high. Furthermore, since the pressure pumps 11 and 11 'supply only the low-pressure side fluid A required by the low pressure machines 5 and 5', the relief valve This eliminates the need for a conduit for returning excess low-pressure fluid A, and eliminates the need for heat exchange provided in the return conduit.

The high-pressure side cylinders 54, 54 of the pressure intensifiers 5, 5 'are connected to both sides of the first check valve group 14 and the second check valve group 15 connected in parallel. The first check valve group 14 has two check valves 14a, 14a, both of which are in a direction that allows the flow of the high-pressure side fluid B from the high-pressure side cylinders 54, 54 '. . A pipe is provided between the two check valves 14a and 14a, and the pipe communicates with the jet impingement section 9. That is, the high-pressure fluid B discharged from the high-pressure cylinders 54, 54, whose pistons 55, 55 'are descending, is sent to the jet impingement section 9 through the check valve 14a. The high-pressure side fluid B pressurized to a high pressure is ejected from the opposed nozzles 91, 91 to collide with each other.

The second check valve group 15 has two check valves 15a, 15a, both of which are in the direction of blocking the flow of the high-pressure side fluid B from the high-pressure side cylinders 54, 54 '. There is a pipeline between the two check valves 15a, 15a, and the high-pressure fluid B is supplied from the tank 7 to the pipeline by the air pump 8. That is, the high-pressure side fluid B is supplied to the high-pressure side cylinder 54, 54 'of which the piston 55, 55' is rising. By arranging the first check valve group 14 and the second check valve group 15 in this way and forming a pipe, the pipe through which the high-pressure fluid B flows can be simplified.

Since pressure pumps are arranged for each pressure intensifier, the operating force of each pressure pump can be controlled freely, minimizing pressure fluctuations during switching during continuous operation by switching pressure pumps. It becomes possible. Also, since the pressure can be set for each pressure pump, the pressure of the low-pressure fluid A applied to the compressors 5, 5 'can be made different. This is important because: The pressure increase ratio of the pressure intensifier is determined by the ratio of the cross-sectional areas of the high-pressure cylinder 54 and the low-pressure cylinder 53. However, these are manufactured by machining, and it is difficult to manufacture an equal cross-sectional area ratio for any two intensifiers. If two pressure intensifiers with unequal pressure intensification ratios are used, the pressure at the jet impingement section 9 will differ when the pressure intensifier 5 is activated and when the pressure intensifier 5 'is activated. In contrast, the present invention According to this embodiment, the pressure of the low-pressure side fluid A can be made different from each other, so that the pressure fluctuation in the jet impingement section 9 can be suppressed to a small value.

Furthermore, in the past, even if one booster failed, it was not easy to determine which failed. However, in the present invention, a pump as a hydraulic pressure generator is provided for each booster, so that when a high-pressure side seal or a check valve is worn out or has a problem, the faulty booster can be easily identified. become. Industrial applicability

As described above, the present invention includes a plurality of pressure intensifiers and a plurality of pumps for supplying a low-pressure side fluid for driving to the pressure intensifiers, wherein one of the pumps is one of the plurality of pressure intensifiers The low pressure side fluid is supplied to the pressure booster and the other pressure intensifiers are connected to each other so that the low pressure side fluid is not supplied.

(1) The size of the pump can be reduced by eliminating waste of the pump.

(2) Since the operating force of each pump can be controlled freely, it is possible to minimize pressure fluctuations at the time of switching during continuous operation by switching pumps.

(3) Since the pressure can be set for each pump, (4) the pressure of the low-pressure fluid to be applied to the pressure machine can be made different, and the pressure of the high-pressure fluid in each high-pressure cylinder can be accurately matched. '

しても Even if one booster fails, it is easy to determine which one has failed. The pressure intensifier includes a low pressure side cylinder, a high pressure side cylinder, a low pressure side piston that divides the low pressure side cylinder into a primary space and a secondary space, and the high pressure side formed integrally with the low pressure side piston. The pump has a high-pressure side piston that moves forward and backward in the cylinder, and each of the pumps is freely rotatable forward and backward.The pump is connected to the primary space of each of the low-pressure cylinders. If the configuration is connected to two or more pressurizers,

① The piping can be simplified.

② Since a switching valve is not required, noise during switching can be eliminated.

If the pump is provided in the low-pressure side fluid, it is possible to reduce the size and sound of the pump. The two pressure intensifiers are connected to each other, and the high pressure side cylinders of both pressure intensifiers are connected to both ends of a first check valve group and a second check valve group arranged in parallel. The second check valve group is connected in a direction that allows the flow from the high-pressure side cylinder, allows the high-pressure side fluid to be discharged from the middle, and is connected in a direction that blocks the flow from both high-pressure side cylinders. If the configuration is such that the supply of the high-pressure fluid is made possible from the above, the pipeline of the high-pressure fluid can also be simplified.

Claims

The scope of the claims

1. A plurality of pressure intensifiers, and a plurality of pumps for supplying a low-pressure side fluid for driving to the pressure intensifier, wherein one of the pumps supplies the low pressure side fluid to one of the plurality of pressure intensifiers. A pressure increasing device characterized in that each pressure booster and a pump are connected so as not to supply the low pressure side fluid to the pressure booster. '

2. The intensifier includes a low-pressure cylinder, a high-pressure cylinder, a low-pressure piston that divides the low-pressure cylinder into a primary space and a secondary space, and the high-pressure cylinder formed integrally with the low-pressure piston. A high-pressure side piston that moves forward and backward in the side cylinder, each of the pumps is freely rotatable forward and backward, and is connected to a primary space of each of the low-pressure cylinders. 2. The pressure intensifier according to claim 1, wherein the pressure intensifier is connected to at least two pressurizers.

3. The pressure intensifier according to claim 1, wherein the pump is provided in the low-pressure fluid. .

4. The two pressure intensifiers are connected to each other, and the high pressure side cylinders of both pressure intensifiers are connected to both ends of the first check valve group and the second check valve group arranged in parallel, and the first check valve is connected. The groups are connected in a direction that allows the flow from both high-pressure cylinders, and the high-pressure side fluid can be discharged from the middle.The second check valve group is connected in a direction that blocks the flow from both high-pressure cylinders 4. The pressure intensifier according to claim 2, wherein a high-pressure side fluid can be supplied from the middle.