JP2011231634A - Pressure converter and method for adjusting performance of pressure converter - Google Patents

Abstract

A pressure converter capable of increasing a processing flow rate and a method for adjusting the performance of the pressure converter are provided.
A high pressure flow path and a low pressure flow path are formed in each of rotating plates connected by a shaft, and each flow path is connected to a casing in accordance with the rotation of the rotating plates. A plurality of pressure-transmitting pipes 13 that can communicate with each other are disposed so as to penetrate in the direction of the rotation axis, and the high-pressure channel 24 is provided on the side of the pair of end cover bodies 30 and 31 that face the rotary plates 21 and 22. A high-pressure relay channel 32 communicating with the low-pressure channel 25 and a low-pressure relay channel 33 communicating with the low-pressure channel 25 are formed, and a high-pressure inlet communicating with the high-pressure relay channel 32 is provided on one of the surfaces different from the facing surface side. A low pressure outlet side port 35 communicating with the side port 34 and the low pressure relay flow path 33 is formed, and a high pressure outlet side port 37 communicating with the high pressure relay flow path 32 and a low pressure relay flow are formed on the other side different from the facing surface side. A low pressure inlet port 38 communicating with the passage 33 is formed. It is.
[Selection] Figure 2

Description

  The present invention relates to a pressure conversion device that transmits pressure from a high-pressure fluid to a low-pressure fluid, and a performance adjustment method for the pressure conversion device.

  Conventionally, in a seawater desalination facility equipped with a reverse osmosis membrane device, a surplus pressure of high-pressure concentrated seawater drained from the reverse osmosis membrane device with a pressure converter is collected as the filtration pressure of the reverse osmosis membrane device. It has been broken.

  In Patent Document 1, as shown in FIG. 15, the low-pressure seawater supplied from the low-pressure inlet-side port 81 is brought into contact with the high-pressure concentrated seawater supplied from the high-pressure inlet-side port 82 in the rotor 80 to boost the low-pressure seawater. In addition, a pressure conversion device is described in which high-pressure seawater is drained from the high-pressure outlet side port 83 and supplied to the reverse osmosis membrane device, and the high-pressure concentrated seawater that has finished transmitting the pressure is drained from the low-pressure outlet side port 84.

  The rotor 80 is formed with a plurality of through holes, and recovers energy by transmitting pressure by bringing a high pressure fluid and a low pressure fluid into direct contact with each other inside each through hole. The rotor 80 is rotated by the flow of the fluid entering and exiting the pressure converter, and the rotation transmits pressure from the high pressure fluid to the low pressure fluid and switches the drainage.

  As shown in FIG. 16, Patent Document 2 includes a rotating body 90 including rotating plates 90 a and 90 b connected in series with a shaft portion 90 c, and the rotating body 90 is rotated by a fluid flow, The high-pressure concentrated seawater supplied from the high-pressure inlet side port 92 is brought into contact with the low-pressure seawater supplied from the side port 91 in the pressure transmission pipe 95 to increase the pressure of the low-pressure seawater, and the high-pressure seawater is discharged as high-pressure seawater. The pressure converter which drains the high pressure concentrated seawater which has finished transmitting the pressure from the low pressure outlet side port 94 is described. The high-pressure inlet port 92 and the high-pressure outlet port 93 are configured to be connected to flow paths formed on the circumferential side surfaces of the rotating plates 90a and 90b, respectively.

US Patent Application Publication No. 2008090903 Chinese Patent Application Publication No. 200710056401

  However, in the pressure conversion device described in Patent Document 1, the rotor 80 is generally made of a high-grade material such as ceramics in order to improve slidability and wear resistance. In addition, since the processing flow rate of the pressure conversion device is determined by the size of the rotor 80 that is a pressure transmission unit, an increase in mass increases as the rotor 80 is increased in size to increase the processing flow rate. Problems such as difficulty in processing and high cost occur. Further, since the mass of the rotor 80 is large, it is difficult to rotate at high speed by the flow of fluid. Further, in a large seawater desalination facility, it is difficult to increase the processing flow rate per unit even though the processing flow rate as a facility is large, and thus a plurality of pressure conversion devices are required. For this reason, there is a problem that the number of pipes connecting each pressure conversion device increases and the construction and management become complicated.

  In the pressure conversion device described in Patent Document 2 above, since the flow paths of the high-pressure concentrated seawater and the high-pressure seawater are formed on the circumferential side surfaces of the rotary plates 90a and 90b, the rotary plates 90a and 90b need to have appropriate thicknesses. It becomes. For this reason, the mass of the rotating body 90 increases, the torsional and bending stresses during rotation increase, and the shaft portion 90c that connects the rotating plates 90a and 90b needs to be thickened. In addition, there is a problem that it is difficult to process the rotating plates 90a and 90b for switching the fluid flow path from the rotation axis direction to the circumferential direction, and the manufacturing and processing costs are high. Since the rotating body 90 becomes heavy, it is difficult to rotate the rotating body 90 at a high speed by a water flow.

  An object of the present invention is to provide a pressure conversion device capable of increasing the processing flow rate and a method for adjusting the performance of the pressure conversion device.

  In order to achieve the above-mentioned object, the first characteristic configuration of the pressure conversion device according to the present invention is a pressure conversion device for transmitting pressure from a high-pressure fluid to a low-pressure fluid as described in claim 1 of the claims. A pair of rotating plates are connected to each other, a high pressure channel and a low pressure channel are formed on each rotating plate in a thickness direction, and each channel is connected with the rotation of the rotating member. A plurality of casings arranged so that communicable pressure transmission pipes penetrate in the direction of the rotation axis, a high-pressure relay channel communicating with the high-pressure channel, and the low-pressure flow on the opposite surface side of each rotary plate A low-pressure relay channel that communicates with the road is formed, and a high-pressure inlet-side port that communicates with the high-pressure relay channel and a low-pressure outlet that communicates with the low-pressure relay channel on one side different from the facing surface side A side port is formed, which is different from the facing surface side And a pair of end cover bodies formed with a high pressure outlet side port communicating with the high pressure relay flow path and a low pressure inlet side port communicating with the low pressure relay flow path. is there.

  According to the above-described configuration, in order to recover the excess pressure of the high-pressure concentrated seawater drained from the reverse osmosis membrane as part of the filtration pressure, the pressure transmission pipe that contacts the high-pressure fluid and the low-pressure fluid is fixed, Since the flow path is switched by a rotating body composed of a rotating plate in which the path and the low-pressure channel are formed in the thickness direction, the rotating plate can be made thin and light in weight, so high-speed rotation is possible even if the size is increased. The flow rate can be increased.

  In the second feature configuration, in addition to the first feature configuration described above, in addition to the first feature configuration described above, the rotating body is rotated in a predetermined direction by receiving a fluid pressure in any of the flow paths. The pressure receiving surface is formed.

  According to the above-described configuration, since the rotating body that rotates by the fluid flow performs the switching between the supply and drainage of the high-pressure fluid and the supply and drainage of the low-pressure fluid, no external power is required, so that the running costs such as electricity costs are reduced. In addition, a switching valve for switching the flow path is not necessary, and the structure can be simplified.

  The third characteristic configuration is that, in addition to the second characteristic configuration described above, the pressure-receiving surface is formed at least in the high-pressure flow path.

  According to the above-described configuration, the rotating body can be rotated by effectively using the pressure of the high-pressure fluid flowing through the high-pressure channel.

  In the fourth feature configuration, in addition to the second or third feature configuration described above, an inclined surface inclined in the circumferential direction of the rotating plate is formed in each flow path, as described in claim 4. The pressure receiving surface is constituted by an inclined surface, and the inclined surface of the high-pressure channel and the inclined surface of the low-pressure channel are formed so that the inclination directions are reversed.

  According to the above configuration, the rotating body can be rotated using not only the pressure of the high-pressure fluid but also the pressure of the fluid flowing through the low-pressure channel.

  In the fifth feature configuration, in addition to any one of the first to fourth feature configurations described above, an opening portion of the high-pressure channel facing the end cover body is provided. In the point which is formed in the diameter direction outside of the rotation board rather than the opening of the low-pressure channel opposite to the end cover body.

  According to the above configuration, since the opening of the high-pressure channel is formed at a position farther from the rotational axis of the rotating body than the opening of the low-pressure channel, the pressure of the high-pressure fluid is effectively used. A large rotational torque can be obtained.

  In the sixth feature configuration, as described in claim 6, in addition to any one of the first to fifth feature configurations described above, the high-pressure relay flow path and the low-pressure relay flow path are configured so that the rotary shaft Each end cover body includes a high-pressure fluid groove portion and a low-pressure fluid groove portion having concentric circumferential portions around the core, and the opening portion of the high-pressure channel facing each end cover body communicates with the high-pressure fluid groove portion. The opening of the low-pressure flow channel that faces the low-pressure channel is formed so as to communicate with the low-pressure fluid groove.

  According to the above-described configuration, even if the rotating plate rotates, the high-pressure channel always communicates with the high-pressure fluid groove and the low-pressure channel always communicates with the low-pressure fluid groove. Pressure transmission.

  In the seventh feature configuration, in addition to any one of the first to sixth feature configurations described above, in addition to the first to sixth feature configurations described above, the openings of a plurality of adjacent pressure transmission pipes may include the rotating body. The at least one high-pressure channel or the low-pressure channel communicates simultaneously with the rotation of.

  According to the above-described configuration, the openings of the plurality of pressure transmission pipes communicate with the high-pressure flow path or the low-pressure flow path simultaneously with the rotation of the rotating body. It is possible to reduce and prevent adverse effects such as fluid pulsation and device pulsation.

  In the eighth feature configuration, in addition to the sixth or seventh feature configuration described above, in addition to the sixth or seventh feature configuration described above, the high-pressure flow is generated along with the rotation of the rotating body in the opening of the pressure transmission pipe. There is an opening that does not communicate with any of the passage and the low-pressure passage.

  According to the above-described configuration, the area between the high-pressure channel and the low-pressure channel formed in the rotating body can be widened, and the possibility that the high-pressure fluid and the low-pressure fluid are mixed can be reduced. it can.

  In the ninth feature configuration, in addition to any of the first to eighth configurations described above, the pressure transmission pipe is concentrically formed around the rotation axis in the casing. Is in a plurality of stages.

  According to the above-described configuration, the processing flow rate of the pressure conversion device can be increased by increasing the pressure transmission pipe.

  According to the tenth characteristic configuration, as described in claim 10, in addition to any of the first to ninth configurations described above, the rotating plate is connected by a shaft portion, and the casing is connected to the shaft portion. It is in the point provided with the bush which slides with an internal peripheral surface.

  According to the above-described configuration, since the rotating plate can be reduced in weight, the diameter of the shaft portion can be reduced, and the rotating body itself can be reduced in weight. Further, by using a bush for the sliding portion, the amount of high-grade material used can be minimized and the cost can be reduced.

  In the eleventh characteristic configuration, as described in claim 11, in addition to any one of the first to tenth configurations described above, flange portions formed at both ends of the casing, and the end cover The flange portion formed on the body is connected and fixed via a spacer member.

  According to the above-described configuration, by providing the spacer member between the casing and the end cover body, performance adjustment can be easily performed by changing the spacer member together with the rotating plate having a different thickness and flow path shape. .

  The twelfth characteristic configuration is that, in addition to any one of the first to eleventh configurations described above, a drive unit that rotationally drives the rotating body is installed as described in claim 12. It is in.

  According to the above-described configuration, even if the fluid flow is unstable, the rotating body is driven to rotate by the driving machine, so that stable rotation can be obtained, and the reliability of the apparatus is improved.

  According to the thirteenth characteristic configuration, as described in the thirteenth aspect, in addition to any one of the first to twelfth configurations described above, the high-pressure fluid from the high-pressure inlet side port is supplied from the reverse osmosis membrane device. The high-pressure concentrated fluid is drained, and the low-pressure fluid from the low-pressure inlet side port is the fluid to be concentrated supplied to the reverse osmosis membrane device.

  According to the above-described configuration, the fluid to be concentrated supplied to the reverse osmosis membrane device is boosted without discarding the excess pressure of the high-pressure concentrated fluid drained from the reverse osmosis membrane device, so that the reverse osmosis pressure is obtained. Is energy efficient.

  The characteristic configuration of the pressure adjusting device performance adjusting method according to the present invention is the pressure converting device having any one of the first to thirteenth characteristic configurations as described in claim 14 of the claims. In this performance adjustment method, the processing flow rate is adjusted by changing the thickness of the rotating plate or the high-pressure channel shape and the low-pressure channel shape.

  According to the above-described configuration, the rotational speed of the rotating body is adjusted by changing the rotational force applied to the rotating plate by changing the thickness of the rotating plate or the high-pressure channel shape and the low-pressure channel shape, The processing flow rate can be easily adjusted.

  As described above, according to the present invention, it is possible to provide a pressure conversion device capable of increasing the processing flow rate and a method for adjusting the performance of the pressure conversion device.

Schematic diagram of seawater desalination facility Explanatory drawing of the pressure converter by this invention It is explanatory drawing of the pressure converter by this invention, Comprising: (a) is a front view, (b) is a rear view. It is explanatory drawing of a rotary body, (a) is a front view, (b) is the sectional view on the AA line of the front view, (c) is a rear view It is explanatory drawing of a casing, (a) is a front view, (b) is the BB sectional drawing of a front view It is explanatory drawing of a spacer member, (a) is a front view, (b) is sectional drawing. It is explanatory drawing of an edge part cover body, (a) is a front view, (b) is CC sectional view taken on the line of a front view, (c) is a rear view It is explanatory drawing of an edge part cover body, (a) is a rear view, (b) is DD sectional drawing of a front view, (c) is a front view Explanatory drawing of the pressure transmission pipe by another embodiment It is explanatory drawing of the mode of the pressure conversion by a pressure converter, (a) is explanatory drawing when pressure conversion is performed within a pressure transmission pipe, (b) is when pressure conversion is not performed within a pressure transmission pipe Illustration of It is explanatory drawing of the mode of the pressure conversion by a pressure converter, (a) is explanatory drawing when pressure conversion is performed within a pressure transmission pipe, (b) is when pressure conversion is not performed within a pressure transmission pipe Illustration of Explanatory drawing of the pressure converter by another embodiment Explanatory drawing of the pressure converter by another embodiment It is explanatory drawing of the pressure converter by another embodiment, Comprising: (a) is schematic of principal part, (b) is schematic of principal part Explanatory drawing of conventional pressure transducer Explanatory drawing of conventional pressure transducer

  Hereinafter, preferred embodiments of the pressure conversion device and the performance adjustment method of the pressure conversion device according to the present invention will be described.

  As shown in FIG. 1, the seawater desalination facility includes a pretreatment unit 1 that removes contaminants in seawater, a filtered seawater tank 2 that stores low-pressure seawater pretreated by the pretreatment unit 1, and a filtered seawater tank 2. The supply pump 3 that supplies the low-pressure seawater stored in the safety filter to the safety filter, the safety filter 4 that removes fine foreign substances in the low-pressure seawater to prevent the reverse osmosis membrane device 6 from being clogged, and the low-pressure that has passed through the safety filter 4 A high-pressure pump 5 for boosting seawater and a reverse osmosis membrane device 6 for separating the boosted low-pressure seawater into fresh water and high-pressure concentrated seawater, etc., can be used as drinking water, industrial water, etc. by removing various salts in seawater So as to desalinate.

  The reverse osmosis membrane device 6 exudes fresh water from which various salts in seawater have been removed to the other side of the reverse osmosis membrane by applying a pressure equal to or higher than the osmotic pressure to one side of the reverse osmosis membrane. Yes, a large pressure higher than the osmotic pressure is required for filtration.

  However, the reverse osmosis membrane device 6 cannot desalinate all of the supplied seawater, and the seawater that has not been desalinated is drained as high-pressure concentrated seawater with very high pressure. Therefore, a pressure conversion device 10 is provided to recover surplus pressure of the high-pressure concentrated seawater drained from the reverse osmosis membrane 6 as effective energy, and the pressure conversion device 10 converts the high-pressure concentrated seawater into the reverse osmosis membrane device 6. The pressure of the high-pressure concentrated seawater is transmitted to the low-pressure seawater in the pressure transmission pipe.

  Specifically, 40% of the amount of water supplied from the filtered seawater tank 2 is boosted to a predetermined pressure higher than the osmotic pressure by the high-pressure pump 5, for example, 6.9 MPa, and the remaining 60% is from the pressure converter 10. The pressure is increased to 6.9 MPa by the booster pump 7 and supplied to the reverse osmosis membrane device 6.

  40% of the low-pressure seawater supplied to the reverse osmosis membrane 6 becomes fresh water, and the remaining 60% is supplied to the pressure converter 10 as high-pressure concentrated seawater (6.75 MPa). The pressure conversion device 10 boosts the low-pressure seawater supplied to the reverse osmosis membrane device 6 by using the excess pressure of the high-pressure concentrated seawater drained from the reverse osmosis membrane device 6. The high-pressure concentrated seawater used for boosting the low-pressure seawater is discharged from the pressure conversion device 10 as low-pressure concentrated seawater.

  As described above, since a part of the pressure required for the reverse osmosis membrane device 6 uses the surplus pressure of the high-pressure concentrated seawater, the energy efficiency of the entire facility is good.

The pressure conversion device 10 will be described in detail.
As shown in FIGS. 2 and 3A, 3B, the pressure conversion device 10 includes a casing 11, a rotating body 20, a spacer member 17, a pair of end cover bodies 30, 31, and the like. It is configured. A connecting member 28 loosely inserted into an opening 36 formed in the end cover body 30 is connected to one end of the shaft portion 23, and the connecting member 28 is configured so that a driving machine (not shown) can be connected. The rotating body can be driven to rotate by the power of the driving machine. The flow of the fluid can be switched more stably by rotating the rotating body 20 at a constant speed with external power by the driving machine. In addition, a seal 36a is provided around the connecting member 28 inside the opening 36 so that seawater does not leak outside.

  In addition, as shown in FIG. 12, when it is not necessary to rotationally drive the rotary body 20 of the pressure conversion device 10 with the power of the driving machine, the end portion cover is not provided with the connecting member 28 at the end portion of the shaft portion 23. The opening 36 of the body 30 may be sealed with the lid member 40.

  The rotating body 20 includes a pair of rotating plates 21 and 22 that are connected to each other by a shaft portion 23.

  As shown in FIGS. 4A and 4B, each rotary plate 21, 22 is formed with an opening 27 through which the shaft portion 23 can be inserted in the center. Two are formed in the thickness direction. The opening of the high-pressure flow path 24 facing the end cover bodies 30 and 31 is formed on the outer side in the radial direction of the rotary plates 21 and 22 than the opening of the low-pressure flow path 25 facing the end cover bodies 30 and 31. Has been. Since the high-pressure channel 24 and the low-pressure channel 25 are formed in the thickness direction of the rotating plates 21 and 22, the thickness of the rotating plates 21 and 22 can be reduced, so that the mass of the rotating body 20 can be reduced. Can be rotated at high speed.

  Further, in the pressure conversion device 10, the fluid basically flows in a direction parallel to the rotational axis of the rotating body 20, and the flow direction does not fluctuate greatly, so that pressure conversion can be performed efficiently.

  The high-pressure channel 24 and the low-pressure channel 25 are formed with inclined surfaces that are inclined in the circumferential direction of the rotary plates 21 and 22, and the pressure-receiving surface 26 is configured by the inclined surfaces. When passing through, the pressure receiving surface 26 receives the pressure of the fluid and generates rotational torque in a predetermined direction so that the rotating body 20 rotates.

  The inclined surface of the high-pressure channel 24 and the inclined surface of the low-pressure channel 25 are formed so that the inclination directions are reversed. The pressure that the high-pressure fluid applies to the inclined surface of the high-pressure channel 24 and the pressure that the low-pressure fluid applies to the inclined surface of the low-pressure channel 25 give the rotational force in the same direction of the rotating plates 21 and 22, respectively. That is, since the rotating body 20 rotates using the pressures of both high and low pressure fluids, the rotating body 20 can rotate more efficiently than when rotating only with the pressure of the high pressure fluid. The pressure receiving surface only needs to be formed at least in the high-pressure channel 24.

  The rotary plates 21 and 22 are made of expensive corrosion-resistant materials because they touch the concentrated salt water. However, since the rotary plates 21 and 22 can be made thin and lightweight, the material cost is low and the production and processing are easy, so the cost can be reduced. Further, since the mass is small, it can be rotated at a high speed, and a large stress such as torsion or bending does not occur on the shaft.

  Moreover, the number of rotations can be adjusted by changing the mass and thickness of the rotating plate, and the channel shapes of the high-pressure channel 24 and the low-pressure channel 25, and the processing flow rate of the pressure conversion device 10 can be adjusted. For example, the high-pressure channel 24 and the low-pressure channel 25 are not limited to a straight line shape in cross section, and may be configured in a curved shape, a blade shape, or a grooved shape. Further, the mass can be changed by cutting the rotating plate and filling it with a material having a different specific gravity after cutting, or by increasing or decreasing the thickness. Changing the mass of the rotating plate changes the ease of rotation of the rotator 20, and changing the thickness and the shape of the high-pressure flow path 24 and the low-pressure flow path 25 allows the pressure receiving surface area and pressure to be applied. Since the force that generates rotation is changed by changing the rotation speed and the rotation speed of the rotating plate is changed, the processing flow rate of the pressure converter 10 is changed. That is, by changing the mass and thickness of the rotating plate, and the flow path shapes of the high pressure flow path 24 and the low pressure flow path 25, a performance adjustment method for the pressure conversion device that adjusts the processing flow rate is realized.

  Bushings 27 that slide on the inner peripheral surface of the casing 11 are provided at both ends of the shaft portion 23. A high-grade material having wear resistance and a low friction coefficient is required for the sliding portion of the casing 11 and the shaft portion 23. By providing the bush 27, it is possible to make only the bush 27 a high-grade material. It becomes. For this reason, the casing 11 and the shaft portion 23 constituting the pressure conversion device 10 can be made of relatively inexpensive materials, and the cost of using high-grade materials can be minimized, so that the cost can be reduced.

  The rotating plates 21 and 22, the shaft portion 23, and the bush 27 are made of a material having corrosion resistance to seawater such as ceramics, duplex stainless steel, super duplex stainless steel, or the like, and, if necessary, thermal spraying or overlaying. Welding, nitriding treatment, HIP treatment, etc. are performed to increase wear resistance and hardness, and to reduce the friction coefficient. The rotary plates 21 and 22 and the shaft portion 23 are coupled by a key and are configured to rotate integrally. The rotary plates 21 and 22 and the shaft portion 23 may be coupled by splines other than the keys, press-fitting, or the like, or may be configured such that the rotary plate and the shaft are integrally formed.

  As shown in FIGS. 5A and 5B, an opening 12 into which the shaft portion 23 is loosely inserted is formed in the center of the casing 11, and each flow path is formed around the opening 12 as the rotating body 20 rotates. A plurality of pressure transmission pipes 13 capable of communicating with 24 and 25 are arranged so as to penetrate in the direction of the rotation axis. In the present embodiment, 16 pressure transmission pipes 13 are provided concentrically.

  In FIG. 5A, the high-pressure channel 24 and the low-pressure channel 25 of the rotating plates 21 and 22 are indicated by two-dot chain lines. The openings 13 a of the three pressure transmission pipes 13 adjacent to each other in the arrangement direction communicate with the high pressure flow path 24 along with the rotation of the rotating plates 21 and 22, and the opening 13 b simultaneously with the low pressure flow path 25. The opening 13c is configured not to communicate with either the high pressure channel 24 or the low pressure channel 25.

  In this way, by providing the opening 13 c that does not communicate with either the high pressure channel 24 or the low pressure channel 25 between the high pressure channel 24 and the low pressure channel 25, The area between them can be widened, that is, the sealing performance between the rotating plate 11 and the casing 14 can be improved, and the possibility that the high-pressure fluid is mixed into the low-pressure fluid can be reduced.

  In the present embodiment, the rotating plates 21 and 22 are configured by including two high-pressure channels and two low-pressure channels, but may be configured by one or three or more. Furthermore, the number of high-pressure channels and low-pressure channels may be different.

  In addition, the total flow volume of the pressure transmission pipe | tube 13 can be changed by changing the number and diameter of a pressure transmission pipe | tube, and the process flow volume of the pressure converter 10 can be changed. Further, the pressure transmission tube 13 is not limited to a cylindrical shape, and the cross-sectional shape may be changed in the longitudinal direction even if the cross-sectional shape is a polygonal shape such as an ellipse, a triangle, or a square. Furthermore, as shown in FIG. 9, the pressure transmission tubes can be arranged in a plurality of stages concentrically.

  Flange portions 14 are formed at both ends of the casing 11, and bolt holes 16 are formed in the flange portion 14 for fixing the end cover bodies 30 and 31 via spacer members 17 described later. Seal grooves 15 into which seals can be inserted are formed on both end faces.

  The casing 11 may be formed entirely of a material having corrosion resistance and strength against seawater, such as a metal material such as ceramics, duplex stainless steel, and super duplex stainless steel, and only the pressure transmission pipe is duplex stainless steel. Alternatively, it may be composed of a high-strength metal tube such as super duplex stainless steel, the pressure transmission tube is covered with a resin material, and the casing may be composed of the resin material. Thereby, weight reduction of a casing can be achieved.

  As shown in FIGS. 6A and 6B, the spacer member 17 has an opening 18 into which the rotary plates 21 and 22 can be loosely inserted in the center, and has a thickness equal to that of the rotary plates 21 and 22. . A bolt hole 19 is formed around the opening 18 at a position corresponding to the bolt hole 16 formed in the flange portion 14 of the casing 11. The spacer member 17 may be integrally formed with the casing 11 or the end cover bodies 30 and 31, but by being configured as a separate member, the rotating plate 21, When the thickness of 22 is changed, a spacer member having the same thickness may be used, which is preferable in that the processing flow rate can be easily changed. The spacer member 17 is formed of a material having corrosion resistance against seawater such as ceramics or resin.

  As shown in FIGS. 7A, 7 </ b> B, and 7 </ b> C, the end cover body 30 has a high-pressure relay flow path 32 that communicates with the high-pressure flow path 24 and a low-pressure flow on the side facing the rotating plate 21. A low-pressure relay flow path 33 communicating with the path 25 is formed, and an opening 36 through which the connecting member 28 connected to the shaft portion 23 can be inserted is formed at the center of a surface different from the facing surface side. A high pressure inlet side port 34 communicating with the high pressure relay flow path 32 and a low pressure outlet side port 35 communicating with the low pressure relay flow path 33 are formed in the upper and lower directions. Inside the opening 36, a seal 36a is provided around the connecting member 28 so that seawater does not leak outside.

  As shown in FIGS. 8A, 8 </ b> B, and 8 </ b> C, the end cover body 31 has a high-pressure relay channel 32 that communicates with the high-pressure channel 24 and a low-pressure flow on the side facing the rotating plate 22. A low-pressure relay channel 33 that communicates with the passage 25 is formed, and a low-pressure inlet that communicates with the high-pressure outlet port 37 and the low-pressure relay channel 32 that communicate with the high-pressure relay channel 31 on a surface different from the facing surface side. A side port 38 is formed.

  The high-pressure relay channel 32 and the low-pressure relay channel 33 include a high-pressure fluid groove portion 32 a and a low-pressure fluid groove portion 33 a each having a concentric circumferential portion around the rotation axis of the rotating body 20, and each end cover body 30, 31. The opening of the high-pressure channel 24 facing the high-pressure fluid groove 32a communicates with the high-pressure fluid groove 32a, and the opening of the low-pressure channel 25 facing the end cover bodies 30 and 31 communicates with the low-pressure fluid groove 33a. Yes. That is, even if the rotary plates 21 and 22 rotate, the high pressure channel 24 is always in communication with the high pressure fluid groove portion 32a, and the low pressure channel 25 is always in communication with the low pressure fluid groove portion 33a.

  The high-pressure fluid from the high-pressure inlet side port 33 is high-pressure concentrated seawater as high-pressure concentrated fluid drained from the reverse osmosis membrane device 6, and the low-pressure fluid from the low-pressure inlet side port 36 is supplied to the reverse osmosis membrane device 6. Low-pressure seawater as a fluid to be concentrated.

  The end cover bodies 30 and 31 are formed of a material that is resistant to seawater, such as a metal material such as ceramics, resin, duplex stainless steel, and super duplex stainless steel, and are attached to the end cover bodies 30 and 31, respectively. A bolt hole 39 is formed at a position corresponding to the bolt hole 16 formed in the flange portion 14 of the casing 11.

  The casing 11 and the pair of end cover bodies 30 and 31 configured as described above are connected and fixed via the spacer member 17 by the bolts and nuts 18. Seals 19 are disposed on the contact surfaces of the casing 11 and the spacer member 17 and the contact surfaces of the spacer member 17 and the end cover bodies 30 and 31, respectively, so that seawater does not leak from the contact surfaces.

  Based on FIG. 10 (a), (b) and FIG. 11 (a), (b), the mode of the specific pressure conversion of the pressure converter 10 by this invention is demonstrated.

  In the following description, FIGS. 10 (a), (b) and FIGS. 11 (a), 11 (b) are schematic views of the end face of the casing 11 taken along the line E-E of each right view. The pressure transmission pipe 13U in the right figure shows the pressure transmission pipe arranged at the 0 o'clock position in each left figure, and the pressure transmission pipe 13D in each right figure shows the pressure arranged at the 9 o'clock position in each left figure. A transmission tube is shown.

  As shown in FIG. 10A, the high pressure flow path 24 of the rotating plate 21 communicates with the pressure transmission pipe 13U, and when the low pressure flow path 25 communicates with the pressure transmission pipe 13D, High-pressure seawater F2 is drained from the high-pressure outlet-side port 37 by the high-pressure concentrated seawater F1 supplied from the high-pressure inlet-side port 34, and low-pressure concentrated by the low-pressure seawater f2 supplied from the low-pressure inlet-side port 38 in the pressure transmission pipe 13D. Seawater f1 is drained from the low-pressure outlet side port 35.

  Passed through the high-pressure concentrated seawater F1 passing through the high-pressure channel 24 of the rotating plate 21 and the low-pressure concentrated seawater f1 passing through the low-pressure channel 25, and passing through the high-pressure seawater F2 passing through the high-pressure channel 24 of the rotating plate 22 and the low-pressure channel 25. The flow of the low-pressure seawater f2 to act acts on each pressure receiving surface 26 to rotate the rotating body 20, and the state shown in FIG. 10B is obtained.

  At this time, since neither the high-pressure flow path 24 nor the low-pressure flow path 25 of the rotating plate 21 communicates with the pressure transmission pipes 13U and 13D, no pressure is transmitted in the pressure transmission pipes 13U and 13D.

  Further, when the rotating body 20 rotates, as shown in FIG. 11A, the high pressure flow path 24 of the rotating plate 21 communicates with the pressure transmission pipe 13D, and the low pressure flow path 25 communicates with the pressure transmission pipe 13U. It becomes. In the pressure transmission pipe 13D, the high pressure concentrated seawater F1 supplied from the high pressure inlet side port 34 drains the low pressure seawater f2 entered in FIG. 10A from the high pressure outlet side port 37 as the high pressure seawater F2, and the pressure transmission pipe 13U. In the inside, the high-pressure concentrated seawater F1 to which the pressure is transmitted in FIG. 10A is discharged from the low-pressure outlet-side port 35 as the low-pressure concentrated seawater f1 by the low-pressure seawater f2 supplied from the low-pressure inlet-side port 38.

  As shown in FIG. 11B, when the rotating body 20 further rotates, neither the high-pressure channel 24 nor the low-pressure channel 25 of the rotating plate 21 is in communication with the pressure transmission pipes 13U and 13D. No pressure is transmitted in the pressure transmission pipes 13U and 13D.

  As described above, the high-pressure flow path 24 and the low-pressure flow path 25 communicating with the pressure transmission pipes 13U and 13D are switched with the rotation of the rotating body 20, and the excess pressure of the high-pressure concentrated seawater is continuously converted to low-pressure seawater. It is.

  In addition, although the concentrated seawater drained from the reverse osmosis membrane device 6 and the seawater supplied to the reverse osmosis membrane device 6 are mixed inside the pressure transmission pipe 13, a certain amount is always mixed in the boundary portion. It becomes a region and swings inside the pressure transmission pipe 13 while acting like a piston.

  Another embodiment of the pressure conversion device according to the present invention will be described. In addition, about the structure similar to the above-mentioned embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  As shown in FIG. 13, when the rotary body 20 of the pressure conversion device 10 is not driven to rotate by the power of the driving machine, the low-pressure outlet side port 35 shown in FIG. 2 is closed and the end cover body 30 is opened. You may comprise 36 so that it may become the low voltage | pressure exit side port 35 of low pressure concentrated seawater. Furthermore, since the end cover body 31 can be formed in the same shape as the end cover body 30 and can be used in common, the number of parts can be reduced.

  In any of the embodiments described above, the low-pressure seawater is supplied to the port used as the high-pressure inlet side port of the high-pressure concentrated seawater, and the low-pressure concentrated seawater is drained from the port used as the high-pressure outlet side port of the high-pressure seawater. The high-pressure concentrated seawater may be supplied to the port used as the low-pressure inlet side port, and the high-pressure seawater may be drained from the port used as the low-pressure side outlet port of the low-pressure concentrated seawater.

  In any of the above-described embodiments, the pressure receiving surface 26 is an inclined surface in the flow path. However, for example, a blade or a groove is provided as a pressure receiving surface in the flow path, or a fluid hits the wall surface of the flow path. The pressure receiving surface can take various forms such as introduction from an oblique direction.

  The end of the pressure transmission pipe 13 formed in the casing 11, the end of the high-pressure flow path 24 and the low-pressure flow path 25 formed in the rotating bodies 21 and 22, and the fluid passage formed in the end cover body 30. Cavitation and pulsation are prevented because the fluid can flow smoothly by chamfering and rounding the edges, etc., and gradually changing the cross-sectional area accompanying the rotation of the rotating body. be able to.

  In any of the above-described embodiments, the case where the end cover bodies 30, 31 have one high-pressure side port and one low-pressure side port has been described. However, a plurality of high-pressure side ports and a plurality of low-pressure side ports are provided. May be. However, since the connection piping is complicated, it is preferable that the number of the high-pressure side port and the low-pressure side port is one.

  In any of the above-described embodiments, the spacer member 17 has been described as having the same thickness as the rotating plates 21 and 22. However, the spacer member 17 and the rotating plates 21 and 22 may have different thicknesses. Good. For example, as shown in FIG. 14A, the spacer member 17a is formed thinner than the thickness of the rotating plate 22, and the end surface 14a of the flange portion 14 of the casing 11 is configured to protrude toward the end cover body 31. As shown in FIG. 14B, the spacer member 17a may be formed thinner than the rotating plate 22 so that the end surface 31a of the end cover body 31 protrudes toward the flange portion 14 of the casing 11. Good. In FIGS. 14A and 14B, only the end cover body 31 side is shown, but the end cover body 30 side can also have the same configuration. Further, the spacer member may be integrally formed with the casing and the end cover body so as to be horizontally divided.

  The specific configuration of the pressure conversion device and the performance adjustment method of the pressure conversion device described above is not limited to the description of the embodiment, and it goes without saying that it can be appropriately changed and designed within the scope of the effects of the present invention. Nor.

6: Reverse osmosis membrane device 10: Pressure conversion device 11: Casing 13: Pressure transmission pipe 14: Flange portion 17: Spacer member 20: Rotating body 21, 22: Rotating plate 23: Shaft portion 24: High pressure channel 25: Low pressure flow Path 26: Pressure receiving surface 27: Bush 30, 31: End cover body 32: High pressure relay flow path 33: Low pressure relay flow path 34: High pressure inlet side port 35: Low pressure outlet side port 37: High pressure outlet side port 38: Low pressure inlet Side port 32a: high pressure fluid groove 33a: low pressure fluid groove

Claims (14)

A pressure transducer that transmits pressure from a high-pressure fluid to a low-pressure fluid,
A pair of rotating plates connected to each other, and a rotating body in which a high-pressure channel and a low-pressure channel are formed in the thickness direction on each rotating plate;
A plurality of casings arranged so that pressure transmission pipes that can communicate with each flow path through the rotation of the rotating body penetrate in the direction of the rotation axis;
A high-pressure relay channel that communicates with the high-pressure channel and a low-pressure relay channel that communicates with the low-pressure channel are respectively formed on the surface facing each rotating plate, and one of the surfaces different from the surface facing the opposite surface A high-pressure inlet side port communicating with the high-pressure relay channel and a low-pressure outlet side port communicating with the low-pressure relay channel, and communicated with the high-pressure relay channel on the other side different from the facing surface side. A pair of end cover bodies formed with a high pressure outlet side port and a low pressure inlet side port communicating with the low pressure relay flow path;
A pressure conversion device comprising:   The pressure converter according to claim 1, wherein a pressure receiving surface that rotates the rotating body in a predetermined direction by receiving a fluid pressure is formed in any of the flow paths.   The pressure conversion device according to claim 2, wherein the pressure receiving surface is formed at least in the high-pressure channel.   An inclined surface inclined in the circumferential direction of the rotating plate is formed in each flow path, and the pressure receiving surface is constituted by the inclined surface, and the inclined direction of the inclined surface of the high pressure flow path and the inclined surface of the low pressure flow path are reversed. The pressure conversion device according to claim 2 or 3, wherein the pressure conversion device is formed to be.   2. The opening of the high-pressure channel facing the end cover body is formed on the outer side in the radial direction of the rotating plate than the opening of the low-pressure channel facing the end cover body. To 4. The pressure conversion device according to any one of 4 to 4. The high-pressure relay channel and the low-pressure relay channel include a high-pressure fluid groove portion and a low-pressure fluid groove portion provided with a concentric circumferential portion around the rotation axis,
An opening of the high-pressure channel facing each end cover body communicates with the high-pressure fluid groove, and an opening of the low-pressure channel facing each end cover body is communicated with the low-pressure fluid groove. The pressure conversion device according to any one of claims 1 to 5.   The pressure conversion according to any one of claims 1 to 6, wherein openings of a plurality of adjacent pressure transmission pipes communicate with at least one of the high-pressure flow path or the low-pressure flow path as the rotating body rotates. apparatus.   The pressure conversion device according to claim 6 or 7, wherein an opening that does not communicate with any of the high-pressure flow path and the low-pressure flow path is present in the opening of the pressure transmission pipe as the rotating body rotates.   The pressure conversion device according to any one of claims 1 to 8, wherein the casing is provided with a plurality of pressure transmission pipes concentrically around the rotation axis.   The pressure conversion device according to any one of claims 1 to 9, wherein the rotating plate is connected by a shaft portion, and the shaft portion includes a bush that slides with an inner peripheral surface of the casing.   The pressure converter according to any one of claims 1 to 10, wherein a flange portion formed at both ends of the casing and a flange portion formed at the end cover body are connected and fixed via a spacer member.   The pressure conversion device according to any one of claims 1 to 11, wherein a driving machine that rotationally drives the rotating body is installed.   The high-pressure fluid from the high-pressure inlet-side port is a high-pressure concentrated fluid drained from a reverse osmosis membrane device, and the low-pressure fluid from the low-pressure inlet-side port is a fluid to be concentrated supplied to the reverse osmosis membrane device. The pressure converter according to any one of 1 to 12. It is the performance adjustment method of the pressure converter in any one of Claims 1-13, Comprising:
A method for adjusting the performance of a pressure conversion device that adjusts a processing flow rate by changing the thickness of the rotating plate or the shape of a high-pressure channel and the shape of a low-pressure channel.

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