JP2005273486A - Fluid transfer system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To miniaturize a system and make continuous transfer possible, thus substantially increase transfer performance (transfer efficiency). <P>SOLUTION: The system comprises a plurality of fixed tubes 20 to 22, two movable tubes 23, 24 and open/close devices 30, 31. The fixed tubes are arranged on the same line at a predetermined distance from one another, and the two movable tubes are arranged between the fixed tubes 20 and 21, and between the fixed tubes 21 and 22 respectively, engaged and inserted with flexible slide. Then the open/close devices are attached to each of the movable tubes 22, 23. The movable tubes 23, 24 are provided with sliding means 23a, 24a which mutually repeat slide both in the approach direction and the isolation direction. Then the transfer system is constituted so that the open/close devices 30, 31 become a combination of an open state and a closed state during the mutually synchronized sliding movement of the movable tubes 23, 24, and the open/close devices 30, 31 can be switched to a combination that the two devices are both in the closed state at the time of the switching in the sliding direction. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to a fluid conveyance device, and more particularly to a fluid conveyance device capable of continuously conveying a fluid.

The fluid transport device has different transport means depending on the type of fluid. For example, when a fluid having viscosity such as concrete or muddy water is transported using a transport pipe, a pressure feed pump is used.
As this type of pressure pump, for example, a piston-type cylinder with a parallel type is provided in parallel with the hopper, each cylinder is pushed alternately into the hopper suction port, and the concrete taken in the cylinder in conjunction with the switching valve is Pumps that are alternately extruded and pumped to a transport pipe are known.

Further, as another fluid conveyance device, a pressure feed pump described in Patent Document 1 is known.
This pressure feed pump is constructed by connecting a fixed cylinder and a movable cylinder in series to a hopper with a built-in rotating screw, and attaching an open / close valve to each cylinder, and sliding the movable cylinder and opening / closing each cylinder. A structure that can be transported to the transport pipe by repeatedly performing the process of taking the viscous fluid forced out by the rotary screw into the fixed cylinder and the discharge process of the viscous fluid by the advance and retreat operation of the movable cylinder by opening and closing the valve. It has become.
JP 2001-99055 A

The above-described conventional fluid conveyance device has the following problems.
(1) In the former pumping pump equipped with parallel cylinders and pistons, it is difficult to install in a narrow space due to the large width of the device, and there is a problem of generating large vibration and noise during transportation. is there.
(2) In the case of the latter pumping pump in which a fixed cylinder and a movable cylinder are connected in series to the hopper, there is an advantage that the installation space can be reduced to some extent, but since the viscous fluid cannot be discharged when the movable cylinder returns, it is intermittent. In addition to the fatal defect that the conveyance performance (conveyance efficiency) is low and the conveyance performance (conveyance efficiency) is low, viscous fluid pulsation occurs during the conveyance.
In addition, since the hopper is indispensable, there is a disadvantage that it cannot be used as a line pump for a transport pipe.
Furthermore, for the purpose of preventing the backflow of viscous fluid, it is necessary to install an opening / closing valve on the fixed cylinder on the discharge side, which increases the number of components of the pump device.

The present invention has been made in view of the above points, and an object thereof is to provide any one of the following fluid conveyance devices.
(1) Continuous transport is possible and the transport performance (transport efficiency) is greatly improved while downsizing the apparatus.
(2) Reduce pulsation during conveyance (3) The conveyance direction can be changed freely.
(4) Excellent versatility that can be applied to the conveyance of various fluids.

  A fluid transport device according to the present invention is a fluid transport device that is interposed in the middle of a transport pipe and takes in the fluid in the transport pipe and discharges it downstream. A plurality of movable cylinders equipped with opening and closing devices that can be opened and closed are slidably arranged to form continuous flow paths inside these cylinders, and each of the movable cylinders described above is adapted to open and close the opening and closing devices. A sliding means for sliding is provided, and an intermediate chamber capable of expanding and reducing the volume is formed between the adjacent opening and closing devices.

  Furthermore, in the fluid transport device according to the present invention, in the fluid transport device described above, when the sliding means slides one of the opened opening / closing devices to the downstream side in the transport direction, the fluid transport device is synchronized with this. The other opening / closing device opened is configured to be slidable toward the upstream side in the transport direction.

  Furthermore, in the fluid transport device according to the present invention, in any one of the fluid transport devices described above, the opening / closing device is a combination of an open state and a closed state during the synchronized sliding movement of both movable cylinders, It is characterized in that it can be switched so as to be a combination of closed states at the time of switching.

  Furthermore, the fluid transport apparatus according to the present invention is characterized in that in any of the fluid transport apparatuses described above, one intermediate chamber is formed in the continuous flow path.

  Furthermore, the fluid transport device according to the present invention is characterized in that, in any of the fluid transport devices described above, a plurality of intermediate chambers are formed in series in the continuous flow path.

Furthermore, the fluid transport device according to the present invention is characterized in that, in any of the fluid transport devices described above, a joint tube is interposed between the bisected fixed tubes so that the transport direction can be changed. It is.

The present invention has one of the following effects.
(1) Since a plurality of cylinders are arranged on the same line, the apparatus can be reduced in size, so that it can be installed in a narrow space.
(2) Since the fluid can be discharged continuously, the conveyance efficiency and the conveyance performance can be greatly improved.
Therefore, it is possible to achieve both the downsizing of the apparatus that could not be achieved by the conventional apparatus and the improvement of the conveyance performance.
(3) Since fluid can be discharged continuously, pulsation during transportation can be significantly reduced.
(4) Since the discharge process by the open / close device in the closed state can be continuously performed, the open / close valve dedicated to preventing fluid backflow, which has been conventionally installed, can be omitted. Therefore, the configuration of the transport device can be simplified.
(5) By selecting the number of intermediate chambers formed, it is possible to easily adjust the final discharge pressure according to the purpose of use.
(6) The fluid conveyance direction can be freely changed by merely interposing the joint cylinder between the fixed cylinders.
(7) In addition to being applicable to the conveyance of various fluids, since there are no hoppers, it can be used as a line pump and is excellent in versatility.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
In the description of the present invention, the “fluid” includes, in addition to liquids such as water and various particles, viscous materials such as concrete and muddy water and various gases.

[Constitution]
(1) Outline of Fluid Transfer Device FIGS. 1 to 4 show the concept of the fluid transfer device according to the present invention.
On the same axis line on the substrate 10, an upstream fixed cylinder 20, an intermediate fixed cylinder 21, and a downstream fixed cylinder 22 are installed at predetermined intervals, and a flow path between the upstream fixed cylinder 20 and the intermediate fixed cylinder 21. Is inserted and slidably disposed, and a second movable cylinder 24 linking the flow path between the intermediate fixed tube 21 and the downstream fixed tube 22 is inserted and slidably disposed. .
A sealing material 40 is installed at the end of each of the fixed cylinders 20 to 22 to ensure high sealing performance between the peripheral surfaces of the movable cylinders 23 and 24.
Each movable cylinder 24, 25 is provided with a first opening / closing device 30 and a second opening / closing device 31 capable of switching between opening and closing of the flow path.

Inside the upstream fixed cylinder 20, the first movable cylinder 23, the intermediate fixed cylinder 21, the second movable cylinder 24, and the downstream fixed cylinder 22 arranged in series from the upstream side to the downstream side in the transport direction, a continuous flow path is provided. An intake chamber 50 is formed on the upstream side of the first opening / closing device 30 in the continuous flow path, an intermediate chamber 51 is formed between the opening / closing devices 30 and 31, and the second opening / closing device 31 A discharge chamber 52 is formed on the downstream side.
Transport pipes 25 and 26 are respectively connected to the left side of the upstream fixed cylinder 20 and the right side of the downstream fixed cylinder 22, and the fluid conveyance device according to the present invention downstream the fluid taken in from the upstream transport pipe 26. It is a device that functions to discharge to the transport pipe 27 on the side.

(2) Sliding means for movable cylinders As the sliding means 23a, 24a of the movable cylinders 23, 24, a telescopic fluid cylinder is used as shown, or a known sliding means such as a screw feed mechanism is applied. Can be.
One end of each of the slide means 23a, 24a is fixed to a fixed member (the fixed cylinder 20, 21, 22, or the substrate 10), and the other end is arranged to be connected to a part of each movable cylinder 23, 24. That's fine.
Further, according to the present invention, in relation to the opening / closing operation of the first opening / closing device 30 and the second opening / closing device 31 described below, the sliding movement in which the movable cylinders 23 and 24 are separated from each other, and the direction in which they approach each other. The point of controlling the slide means 23a, 24a so as to repeat the slide movement is a control feature.

(3) Opening / closing device The first opening / closing device 30 and the second opening / closing device 31 interposed in the movable cylinders 24, 25 are devices having substantially the same structure, for example, a plate body in which the movable cylinders 24, 25 are arranged in the transverse direction; It is constituted by a driving means for sliding the plate body, or it is constituted by a cylinder in which the movable cylinders 24 and 25 are arranged in the transverse direction and a through hole is formed on the side surface, and a driving means for rotating the cylinder at a predetermined angle. Or a plurality of plates arranged radially like a shutter structure of a camera and means for opening and closing a flow path constituted by means for operating these plates in the diameter-expanding and diameter-decreasing directions. In short, any structure that can open and close the flow path may be used.

The opening / closing control of each opening / closing device 30, 31 will be described. When both the movable cylinders 23, 24 described above are slidingly moved away from each other or toward each other, one of the opening / closing devices 30, 31 is arranged. Is a combination of the open state and the other closed state, and when the sliding directions of the movable cylinders 23 and 24 are switched (when the stroke reaches the maximum or minimum), both the opening and closing devices 30 and 31 are closed. The opening / closing of each opening / closing device 30, 31 can be controlled.
That is, there is no combination in which each of the opening / closing devices 30 and 31 is in an open state while both the movable cylinders 23 and 24 are slid, and is always a combination of opening and closing or a combination of only closing.
This combination of opening / closing control of each of the opening / closing devices 30 and 31 effectively prevents the backflow of the fluid by continuously conveying the fluid and avoiding the installation of a dedicated valve for preventing the backflow. Because.

[Operation]
Next, the operation of the fluid conveyance device according to the present invention will be described.

(1) When the intermediate chamber is expanded FIG. 2 shows that the opening / closing devices 30, 31 indicated by the solid lines provided in the movable cylinders 23, 24 are in the approaching state, and the opening / closing devices 30, indicated by the alternate long and short dash lines are operated by the operation of the sliding means 23a, A state immediately after starting to slide toward each other in the direction of separation like 31 is shown.
In this state, the first opening / closing device 30 is in an open state, and the intake chamber 50 is in communication with the intermediate chamber 51. The second opening / closing device 31 is closed, and the intermediate chamber 51 and the discharge chamber 52 are disconnected. The following description will be made on the assumption that the chambers 50 to 52 are already filled with fluid.

In this state, when the movable cylinders 23 and 24 are slid in the direction away from each other by the operation of the slide means 23a and 24a, the following steps proceed in parallel in the chambers 50 to 52.
First, as the second movable cylinder 24 and the second opening / closing device 31 move to the right (slide to the downstream side), the fluid in the discharge chamber 52 is pushed out to the closed second opening / closing device 31 and discharged downstream. (Discharge process).
Further, the volume in the intermediate chamber 51 expands as the opening / closing devices 30 and 31 slide in the separation direction. As the second opening / closing device 31 moves to the right (slides downstream), negative pressure tends to be generated at a position close to the second opening / closing device 31 in the intermediate chamber 51. The accumulated amount of fluid increases due to the negative pressure and the supply pressure of the fluid supplied from the upstream side through the opened first opening / closing device 30 (suction process).
As the first movable cylinder 23 and the first opening / closing device 30 are moved to the left (slid to the upstream side), the intake chamber 50 is reduced in volume, but receives fluid supplied from the upstream side to take in fluid. To continue (capture process).
As described above, when the volumes of the intermediate chambers 51 continue to expand by sliding the movable cylinders 23 and 24 away from each other, in each of the chambers 50 to 52, the fluid intake process, the fluid suction The process and the fluid discharge process proceed simultaneously.
At this time, in order not to generate a cavity in the intermediate chamber 51, the amount of fluid discharged by the second movable cylinder 24 and the second opening / closing device 31 is balanced with the amount of fluid supplied from the upstream side or less. It is desirable to control the slide speed so that it is relevant.

(2) At the time of switching the sliding direction When the opening / closing devices 30, 31 provided in the movable cylinders 23, 24 reach the most separated state, the first opening / closing device 30 that has been in the open state is switched to the closed state.
Thus, when switching the sliding direction of the movable cylinders 23 and 24, the first and second opening / closing devices 30 and 31 located on both sides of the intermediate chamber 51 are closed, and the flow path is temporarily blocked to Prevent backflow.
The blocking time of the flow path is set to an extremely short time (about several seconds of commas) that does not hinder continuous fluid conveyance. The shorter the shut-off time, the greater the pulsation reduction effect during fluid transfer.
In addition, when the sliding direction is switched from the state in which the opening / closing devices 30, 31 provided in the movable cylinders 23, 24 shown in FIG. Only closed.

(3) When the intermediate chamber is reduced As shown in FIG. 3, when the open / close devices 30 and 31 provided in the movable cylinders 23 and 24 reach the most separated state and the sliding direction is changed in the approaching direction, the open state is established. The first opening / closing device 30 is switched to the closed state to block the flow path between the intake chamber 50 and the intermediate chamber 51, and the second opening / closing device 31 that has been closed is switched to the opened state. 51 and the discharge chamber 52 are in a communication state.

When the movable cylinders 23 and 24 are slid in the directions approaching each other by the operation of the sliding means 23a and 24a, the following steps proceed in parallel in the chambers 50 to 52.
As the first movable cylinder 23 and the first opening / closing device 30 move to the right (slide to the downstream side), the fluid located in the intermediate chamber 51 is pushed out to the first opening / closing device 30 in the closed state. It passes through the second opening / closing device 31 and is discharged into the discharge chamber 52 (discharge process).
As a result, in the discharge chamber 52, the previously filled fluid is pushed out in a tocorotene manner and discharged downstream (discharge process).
Further, as the opening / closing devices 30 and 31 slide in the approaching direction, the volume in the intermediate chamber 51 is reduced while the volume in the intake chamber 50 is expanded.
Therefore, the negative pressure generated in the intake chamber 50 when the first opening / closing device 30 moves rightward (slides downstream) and the fluid is supplied from the upstream side, so that the amount of fluid stored in the intake chamber 50 is increased. Increase (uptake process / inhalation process).
As described above, when the movable cylinders 23 and 24 are slid in the directions approaching each other and the volume of the intermediate chamber 51 is reduced, in each of the chambers 50 to 52, a fluid intake process and a fluid suction process are performed. The fluid discharge process proceeds simultaneously.

  The open / close states of the first and second open / close devices 30 and 31 when the open / close devices 30 and 31 provided on the movable cylinders 23 and 24 are slid in the separation direction or the approaching direction and when the slide direction is switched. It is organized and shown in Table 1.

  Table 2 summarizes the operation process in each of the chambers 50 to 52 when the opening / closing devices 30 and 31 provided in the movable cylinders 23 and 24 are slid in the separation direction or the approaching direction.

FIG. 4 shows a combination of the open / close states of the open / close devices 30 and 31 when the open / close devices 30 and 31 provided in the movable cylinders 23 and 24 are slid and the operation processes in the chambers 50 to 52. A transport chart is shown.
In the figure, the central straight line indicates a time axis that progresses from left to right, the upper half waveform indicates the conveyance operation by the first movable cylinder 23 and the first opening / closing device 30, and the lower half waveform indicates the second waveform. The conveyance operation by the movable cylinder 24 and the second opening / closing device 31 is shown. Regarding the waveform, the arrow indicates the sliding direction, the solid line indicates the closed state of the switchgears 30 and 31, and the broken line indicates the open state of the switchgears 30 and 31. Black circles indicate the switching timing of the sliding direction.

As described above, the fluid conveyance device according to the present invention can continuously convey the fluid because the discharge process always exists even when the movable cylinders 23 and 24 are slid in any direction.
In addition, both the opening and closing devices 30 and 31 are closed at the same time when the sliding direction is switched. Since this time is so short as to be negligible for conveyance, it is also possible to suppress the occurrence of pulsation during conveyance.
In addition, the remaining chambers that have not performed the discharge process are prepared for discharge by performing a fluid intake process and a suction process, so that the fluid can be transferred immediately after switching the slide direction. Efficiency is greatly improved.
In addition, since the upstream chamber, the intermediate chamber, and the downstream chamber are formed in series in each cylinder arranged in series, the width of the transfer device can be reduced, and installation in a narrow space is also possible.
In addition, the transfer capacity of the transfer device is obtained by multiplying the cross-sectional area of the flow path by the slide movement amount of the switchgear and arranging multiple sets in series with respect to the flow path. It is also excellent in terms of.

[Other embodiments]
Other embodiments will be described below. In the description, the same parts as those of the above-described embodiments are denoted by the same reference numerals, and detailed description thereof will be omitted.

5 and 6 show another fluid conveyance device configured to be able to convey a fluid in a direction other than a straight line.
FIG. 5 shows a mode of transporting in a direction crossing the fluid supply direction, and FIG. 6 shows a mode of transporting in a direction opposite to the fluid supply direction.
In any form, the intermediate fixed cylinder 21 may be divided into two and an angled joint cylinder 27 may be interposed therebetween.
The joint cylinder 27 may be formed of a hard material that cannot be deformed, or may be formed of a flexible material, or may incorporate a deformable mechanism.
By configuring as in the present example, it is possible to easily change the fluid conveyance direction in any direction according to the usage or on-site situation.

  Although not shown, a pressure gauge capable of taking out the internal pressure of each of the chambers 50 to 52 as an electrical signal is additionally installed, and based on these pressure signals, the driving means of each switching device 30, 31 and each movable cylinder In combination with a control unit that issues a control command to the slide means 23a, 24a, when an abnormality is detected in the internal pressure of each of the chambers 50 to 52, the slide operation is temporarily interrupted, and each opening and closing is linked to this. It is also possible to perform automatic control such as switching the devices 30 and 31 to the closed state.

Moreover, although the above embodiment demonstrated the case where only one intermediate chamber 51 in which a volume could be expanded / contracted between adjacent switchgear was provided, the some intermediate chamber 51 is arrange | positioned in series and a fluid conveyance apparatus is comprised. You may do it.
In this example, since the final discharge pressure can be increased in proportion to the number of intermediate chambers 51 formed, the number of intermediate chambers 51 can be selected only by selecting the number of intermediate chambers 51 without changing the diameter of the cylinder. The final discharge pressure can be adjusted.

Model diagram of fluid transfer device according to the present invention Model diagram of fluid transfer device operation during expansion of intermediate chamber Model diagram of the operation of the fluid transfer device when the intermediate chamber is reduced Conveying chart for explaining the operating principle of the fluid conveying apparatus according to the present invention Explanatory drawing of other forms with changed transport direction Explanation of other modes with changed transport direction

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Substrate 20 ... Upstream fixed cylinder 21 ... Intermediate fixed cylinder 22 ... Downstream fixed cylinder 23 ... First movable cylinder 23a ... Slide means 24 ... Second movable cylinder 24a ... Slide means 25, 26... Transport pipe 27 ... joint cylinder 30 ... fixed bit 40 ... sealing material 50 ... intake chamber 51 ... intermediate chamber 52 ... discharge chamber

Claims (6)

A fluid conveying device that is interposed in the middle of the transport pipe and takes the fluid in the transport pipe and discharges it downstream.
Between a plurality of fixed cylinders, a plurality of movable cylinders equipped with opening and closing devices capable of opening and closing the flow paths are slidably arranged to form continuous flow paths inside these cylinders,
Each movable cylinder described above is provided with a sliding means that slides corresponding to opening and closing of the opening and closing device,
An intermediate chamber capable of expanding and reducing the volume is formed between the adjacent opening and closing devices,
Fluid transport device.   2. The slide device according to claim 1, wherein when the one opening / closing device in the open state is slid to the downstream side in the transport direction, the other open / close device in the open state is synchronized upstream with the open / close device in the transport direction. A fluid transporting device configured to be slidable toward the side.   3. The switchgear according to claim 1, wherein the opening / closing device can be switched to a combination of an open state and a closed state during a synchronized sliding movement of both movable cylinders, and a combination of a closed state when the slide direction is switched. A fluid transfer device, characterized in that it is configured as follows.   4. The fluid transfer device according to claim 1, wherein one intermediate chamber is formed in the continuous flow path.   4. The fluid transfer device according to claim 1, wherein a plurality of intermediate chambers are formed in series in the continuous flow path.   6. The fluid conveyance device according to claim 1, wherein a joint cylinder is interposed between the two fixed cylinders so that the conveyance direction can be changed.

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