JP3151536B2 - Method and apparatus for cleaning suction / discharge valve of high viscosity fluid pump - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for cleaning a suction and discharge valve of a high-viscosity fluid pump for sucking and discharging a high-viscosity fluid such as concrete in a hopper.

[0002]

2. Description of the Related Art As a suction / discharge valve for switching between a high viscosity fluid pump such as a concrete in a hopper and a high viscosity fluid pump for suction / discharge, a conventional slide valve type and a swing valve type are conventionally used. There is.

The latter oscillating valve type suction / discharge valve includes:
Conventionally, a configuration as shown in FIGS. 8 and 9 is known. That is, at the front side of a hopper 1 in which two suction and discharge ports 2 are provided side by side at the lower part of the front surface, two fluid pressure feeding cylinders 3 are horizontally installed corresponding to the two suction and discharge ports 2. The piston 4 housed in the fluid pumping cylinder 3 is integrally connected to a piston of a main cylinder (not shown) via a rod 5, and the two main cylinders are alternately expanded and contracted so that the pistons in the two fluid pumping cylinders 3 can be moved. The piston 4 is alternately moved forward and backward. On the other hand, inside the hopper 1, an S-shaped oscillating tube 6 having one end rotatably penetrating the back of the hopper 1 is housed, and a seal ring 7 is attached to the other end of the oscillating tube 6, A connection in which a seal ring 7 part can alternately coincide with the two suction / discharge ports 2, and a middle wall of the swinging tube 6 penetrates a front wall of the hopper 1 and is rotatably supported by the front wall. The distal end of the shaft 8 is fixed, and the operating lever 9 is integrally attached to the end of the connecting shaft 8. The operating lever 9 is connected to the operating lever 9 by alternately expanding and contracting the two swing cylinders 10 and 11. The swing tube 6 is made to swing around the axis of the connecting shaft 8 via the shaft 8. Reference numeral 12 denotes a transport pipe.

When the suction / discharge valve of the above-mentioned conventional high-viscosity fluid pump is operated to suction / discharge the high-viscosity fluid 13 in the hopper 1, the oscillating pipe 6 is swung in the high-viscosity fluid 13 in the hopper 1. When the front end of the oscillating tube 6 is positioned at one of the suction and discharge ports 2, the piston 4 of the fluid pressure feeding cylinder 3 on the side of the suction and discharge port 2 is moved forward to raise the suction height so far. At the same time that the viscous fluid 13 is discharged through the oscillating pipe 6, the piston 4 is retracted in another fluid pressure feeding cylinder 3 so that the highly viscous fluid 13 in the hopper 1 is sucked. Is switched to another suction / discharge port 2 so that the piston 4 of the fluid pressure feeding cylinder 3 on the side of the suction / discharge port 2 is advanced, and at the same time, the high viscosity fluid 13 is sucked into the other fluid pressure feeding cylinder 3. Repeat the operation It is to perform the switching of suction and discharge of the viscous fluid.

As described above, the highly viscous fluid 13 in the hopper 1
Is pumped through the oscillating pipe 6 by alternately advancing and retracting the pistons 4 in the two fluid pressure feeding cylinders 3 when the pumping operation of the high viscosity fluid is completed. Although the high-viscosity fluid remaining in the transport pipe 12 is removed, the high-viscosity fluid remaining in the oscillating pipe 6 is removed when the oscillating pipe 6 and the transport pipe 12 are removed. The connection portion 14 is removed, and the high-viscosity fluid remaining in the swinging tube 6 is removed to be removed and washed.

[0006]

However, in the above-described conventional method for removing the high-viscosity fluid remaining in the oscillating pipe, the transport pipe 12 is detached from the connecting portion 14 to remove the remaining high-viscosity fluid from the tip of the oscillating pipe 6. Since it is to be taken out, there is a possibility that the vicinity of the tip of the oscillating tube outside the hopper 1 may be soiled, and much effort is required to take out the oscillating tube 6 from the inside.

Therefore, the present invention is intended to remove the high-viscosity fluid by a simple operation and in a short period of time for cleaning, and to prevent the high-viscosity fluid to be removed from scattering around. Is what you do.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a hopper having a rocker at a position distant from two suction and discharge ports on a front wall of a hopper and at a rocking radius position at a front end of a rocking tube. An opening corresponding to the diameter of the front end side of the moving tube is provided, and after the pressurizing operation of the high-viscosity fluid is completed, the front end side of the oscillating tube is lifted to communicate the front end with the opening, and then the opening is opened. Attach the washing tube, fill the inside of the washing tube, and supply high-pressure fluid from outside to the washing tube to push the filling into the swinging tube and feed it, thereby washing the entire inside of the swinging tube. . Further, as means for lifting the rocking tube, a clutch is provided between the connecting shaft fixed to the rocking tube and the operating lever, and rotation of the operating lever and turning on of the clutch are performed.
-The configuration is such that the connecting shaft is rotated when the switch is OFF to move the front end of the swing tube to the opening position. Alternatively, an output shaft of a drive device for rotating the connection shaft is connected to an end of the connection shaft via a clutch, and the connection shaft can be switched between rotation by an operation lever and rotation by the drive device. Good. Further, the washing tube may be provided with a tapered sealing device at the tip so that the washing tube can be attached to the swinging tube by a detachable operation cylinder.

[0009]

[Action] When the high-viscosity fluid pumping operation of the high-viscosity fluid pump is completed and the pump is to be cleaned, the front end of the rocking tube must be
If it is lifted by the rotation of the operation lever or by the rotation of the drive device and positioned at the opening, the sponge or the like is filled in the swinging tube through the opening through the washing tube, and high-pressure fluid such as compressed air or high-pressure water is supplied. Since the filling is pushed into the oscillating tube and moved, not only in the oscillating tube,
The inside of the transport pipe can also be cleaned.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 to 4 show an embodiment of the method and the apparatus according to the present invention, which are the same as those of the conventional high-viscosity fluid pump having a swing valve type suction / discharge valve shown in FIGS. 8 and 9. , A hopper 1 having two suction and discharge ports 2 arranged on the front side
In the inside, an S-shaped swinging tube 6 is swingably housed, and two fluid pressure feeding cylinders 3 communicated with the two suction and discharge ports 2 are horizontally installed. Fixed connecting shaft 8
Is rotated clockwise and counterclockwise by two rocking cylinders 10 and 11 via an operation lever 9 to rock the rocking tube 6 left and right in the hopper 1. An opening 15 slightly larger than the diameter of the oscillating tube 6 is provided at the upper portion and at the position of the oscillating radius of the oscillating tube 6 so that the washing tube 16 can be attached to the opening 15. Close the high-viscosity fluid 1 in the hopper 1
3 should be prevented from flowing out.
The free end (outer end) of the connecting shaft 8 for transmitting the oscillating power to the oscillating tube 6 is provided with a spline 18 as shown in FIG. A control member 9 having a boss portion 22 having a spline 21 that matches the spline 19 on the outer peripheral surface at one end side rotatably.
A ring-shaped slider 24 having a spline 23 on the inner peripheral surface so as to be fitted to the splines 19 and 21 is provided. A clutch 20 is formed by the splines 19 and 21 and the slider 24. Slider 2
4, the clutch is turned on, the power from the operating lever 9 is transmitted to the connecting shaft 8 via the clutch member 17, and the clutch is turned off when the slider 24 is only on the spline 19, 9 is connecting shaft 8
Allow the top to rotate freely. Reference numeral 25 denotes a ratchet mechanism of the ratchet handle 26, which is engaged with the end of the connecting shaft 8 so that the connecting shaft 8 can be locked or free.

In the drawings, the same parts as those shown in FIGS. 8 and 9 are denoted by the same reference numerals.

The pistons 4 in the two fluid pressure feeding cylinders 3 are alternately advanced and retracted, and at the same time, the swing pipe 6 is switched to the fluid pressure feeding cylinder 3 side on the discharge side, whereby the height inside the hopper 1 is increased. Oscillating pipe 6 and transport pipe 12 for viscous fluid
However, when the pumping operation is completed, it is necessary to remove the remaining high-viscosity fluid.

When cleaning the high-viscosity fluid pump for removing the high-viscosity fluid remaining in the oscillating tube 6 in the cleaning for removing the remaining high-viscosity fluid, the oscillating tube 6 is connected to the connecting shaft 8.
Around the axis of the hopper 1 so that the front end of the swing tube 6 is
Lift it up so that it is located in the upper opening 15
Connect to 5. As a specific method in this case, first, the ratchet mechanism 25 of the ratchet handle 26 is inserted into the outer end of the connection shaft 8 so that the connection shaft 8 can rotate only in one direction and is locked in the opposite direction. Next, the swing tube 6 is switched to, for example, the position of the suction / discharge port 2 on the left side in FIG. 2, and the clutch 20 is turned off as shown in FIG. Next, the swing cylinder 10 is extended and the operation lever 9 is tilted to the left as shown in FIG. In this state, FIG.
The clutch 20 is turned on to extend the swing cylinder 11, and the operation lever 9 is tilted rightward in FIG. As a result, the connecting shaft 8 is integrally rotated, so that the swing tube 6 is displaced clockwise in FIG. 2 by a required angle. Next, the clutch 20 is turned off, the swing cylinder 10 is extended, the operating lever 9 is idled, and the clutch 20 is turned on again to extend the swing cylinder 11, thereby rotating the connecting shaft 8. The swing tube 6 is displaced clockwise. Such an operation is repeated as appropriate to lift the swinging tube 6 so that the front end is located at the position of the opening 15. When the swing tube 6 is communicated with the opening 15, the washing tube 16 is attached to the opening 15. At this time, clutch 2
Numeral 0 keeps the ON state and restricts the position of the swing tube 6.

When the washing pipe 16 is attached, the inside of the washing pipe 16 is filled with a filling 27 such as a sponge, and compressed air or high-pressure water is supplied into the washing pipe 16 from the outside to fill the filling 2.
7 is pushed into the oscillating pipe 6 to be pumped, the residual high-viscosity fluid in the oscillating pipe 6 is pushed out for cleaning, and the filling 27 is further pushed into the transport pipe 12 to be pumped, whereby the inside of the transport pipe 12 is pressed. A highly viscous fluid can be discharged at the same time.

When the cleaning operation of the high-viscosity fluid pump is completed as described above, the clutch 20 is turned off, and the swinging tube 6 is naturally lowered by its own weight. On this occasion,
If the swinging tube 6 does not descend naturally, the swinging tube 6 is forcibly lowered in the manner described above when lifting the swinging tube.

When the swing tube 6 is lowered and returned to a position where the pump can be operated, the clutch 20 is fixed while the clutch 20 is ON.

Next, FIG. 5 shows another embodiment of the present invention, in which the swing tube 6 is rotated around the axis of the connecting shaft 8 so that the front end of the swing tube 6 is located above the hopper 1. As a means for lifting up so as to match the opening 15, a configuration in which the connection shaft 8 is rotated by driving the motor 28 is also used. That is, in the configuration shown in FIG. 3, the length of the boss portion 22 of the operation lever 9 in the axial direction is made slightly longer so that the bearing 29 is attached to the outer peripheral surface of the boss portion 22 between the operation lever 9 and the clutch 20. , The inner race of the bearing 29 is fixed to the boss portion 22, and the support member 30 is attached to the outer race of the bearing 29 so as to be parallel to the connecting shaft 8 and protrude toward the free end of the connecting shaft 8. The support material 3
The spline of the clutch member 17 that forms the clutch 20 on the free end side of the connecting shaft 8 is supported by attaching a motor 28 with a speed reducer to the leading end of the connecting shaft 8 so that the output shaft 28a faces the free end side of the connecting shaft 8. Spline 3 corresponding to 19
1 is provided at the end of the output shaft 28a of the motor 28 so that the spline 31 of the output shaft 28a and the spline 19 of the clutch member 17 can be fitted with the ring-shaped slider 24 having the spline 23 on the inner peripheral surface. By sliding the slider 24, the spline 21 of the boss portion 22 and the spline 19 of the clutch portion 17 can be fitted, or the spline 19 and the spline 31 of the output shaft 28a can be fitted.

When the slider 24 of the clutch 20 is slid toward the connection shaft 8 and the slider 24 is fitted to the splines 19 and 21, the rotation of the operation lever 9 can rotate the connection shaft 8. In this case, the boss portion 22 of the operation lever 9 and the motor 28 are relatively displaced.
Since the support member 30 supporting the motor 28 is supported by the boss portion 22 via the bearing 29, the boss portion 22 can rotate without any trouble. Next, the clutch 20 is turned off and the operation lever 9 is caused to idle in the reverse direction. In this case, the slider 24 of the clutch 20 is fitted to the splines 19 and 31 so that the boss portion 22 can rotate freely. . When the operating lever 9 is returned to the original position, the slider 24 is fitted to the splines 19 and 21 to integrate the boss portion 22 and the connecting shaft 8 so that the rotation of the operating lever 9 causes the connecting shaft 8 to rotate.
The front end of the oscillating tube 6 can be further lifted through the above, and by repeating such an operation, the front end of the oscillating tube 6 can be lifted in the same manner as in the above-described embodiment.

On the other hand, when the motor 24 is driven by fitting the slider 24 to the spline 31 of the output shaft 28a and the spline 19 of the clutch member 17, the power is transmitted from the output shaft 28a to the connecting shaft 8 via the slider 24 and the clutch member 17. Is transmitted, and the swing tube 6 can be swung at a stroke via the connecting shaft 8 according to the rotation angle of the motor 28.

According to this embodiment, the slider 24 of the clutch 20 is slid to select a spline to be fitted, so that the swinging tube 6 is swung via the connecting shaft 8 by the rotation of the operating lever 9 or the motor is rotated. By driving the drive shaft 28, the connecting shaft 8 can be rotated to swing the swing tube 6.

FIG. 6 shows still another embodiment of the present invention. In the embodiment of FIG. 5, the connection shaft 8 is rotated by switching the clutch 20 by either rotation of the operation lever 9 or driving of the motor 28. The connection shaft 8 is rotated only by driving the motor 28 instead of the connection shaft 8. That is, the output shaft 28a of the motor 28 with a reduction gear is positioned opposite to the free end side of the connection shaft 8 fixed to the swing tube 6, and the end of the connection shaft 8 and the end of the output shaft 28a are connected. A support member 30 connected by a coupling 32 and supporting the motor 28 is supported on a connecting shaft 8 via a bearing 29.

According to the embodiment shown in FIG. 6, the swing tube 6 can be swung by the motor 28. When the inside of the swing tube 6 is cleaned, the front end of the swing tube 6 is opened. Can be quickly lifted to the position, and the washing can be performed quickly.

FIG. 7 shows another example of the washing tube 16 used in the present invention. In order to achieve a sealing property at the time of washing, a tapered rubber seal ring 34 is disposed at the tip end. A washing pipe 3 having a structure in which a seal ring 34 is held by a support 35 and a bracket 36 is attached to the back of the elbow pipe.
3, the tip of the piston rod of the cylinder 37 for attachment / detachment is connected to the bracket 36, the washing pipe 33 is moved back and forth in the horizontal direction by the cylinder 37, and the part of the seal ring 34 is attached / detached to the front end of the swing pipe 6. It is intended to be.

The operation of lifting the front end of the oscillating tube 6 and attaching the washing tube 33 to the front end is an unsafe operation due to the instability of the scaffold, the narrow working space, and the like. In this regard, FIG.
When the washing pipe 33 can be attached to the swing pipe 6 by the cylinder 37 as described in the above, the work of attaching the washing pipe 33 by the operator can be omitted, and it is easy to wash the swing pipe 6 by flipping it up. There are advantages.

[0026]

As described above, according to the method and the apparatus for cleaning the suction / discharge valve of the high-viscosity fluid pump of the present invention, the oscillating tube is located at a position away from the two suction / discharge ports on the front wall of the hopper. An opening corresponding to the diameter of the front end side of the rocking tube is provided at the rocking radius position of the front end, and after the high-viscosity fluid is pumped, the front end of the rocking tube is lifted to open the front end of the rocking tube. Then, a washing tube is attached to the opening, a filling is filled in the washing tube, and a high-pressure fluid is supplied from the outside into the washing tube to push the filling into the swinging tube and pressure-feed the same. Is washed over the entire length, so that not only the high-viscosity fluid remaining in the oscillating pipe but also the high-viscosity fluid in the transport pipe connected to the oscillating pipe can be discharged at the same time. Separating rocking tube and transport tube It is unnecessary and does not pollute the surroundings, so that the pump can be washed easily and in a short time, the labor of the operator can be reduced, and as a means for lifting the rocking tube, Operation lever rotation by clutch and cylinder ON / O
If the front end of the rocking tube is lifted by FF switching, the rocking tube can be reliably lifted and can be correctly positioned in the opening at the top of the hopper. Further, the rocking tube is rocked by the driving device in the above-described manner. Using the configuration together,
By selectively performing the operation, in the case of using a driving device, quick lifting is also possible, and the work efficiency can be improved. Furthermore, if a seal device is attached to the tip of the cleaning pipe and the cylinder can be mounted on the swinging pipe, the work of mounting the cleaning pipe by an operator when the work platform is unstable and the working space is narrow is small. Since it can be omitted, an excellent effect that the safety of work can be achieved can be obtained.

[Brief description of the drawings]

FIG. 1 is a cut-away side view showing one embodiment of the present invention.

FIG. 2 is a view taken in the direction of arrows II-II in FIG.

FIG. 3 is an enlarged view of a part III in FIG. 1;

FIG. 4 is a cut-away side view showing a state where a clutch is off and a state where a ratchet handle is inserted into a connection shaft.

FIG. 5 is an enlarged view of an oscillating tube driving unit showing another embodiment of the present invention.

FIG. 6 is a schematic view of an oscillating tube driving section showing still another embodiment of the present invention.

FIG. 7 is a side view showing another example of the washing tube.

FIG. 8 is a cut side view showing a conventional example.

9 is a cross-sectional view from the IX direction in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hopper 2 Suction / discharge port 3 Fluid pressure feeding cylinder 4 Piston 6 Oscillating pipe 8 Connecting shaft 9 Operating lever 10, 11 Oscillating cylinder 12 Transport pipe 13 High viscous fluid 15 Opening 16, 33 Washing pipe 20 Clutch 28 Motor with reduction gear (Drive device) 28a Output shaft 34 Seal ring (seal device) 36 Bracket 37 Removable cylinder

Claims (4)

(57) [Claims] An opening corresponding to the diameter of the front end of the rocking tube is provided at a position away from the two suction and discharge ports on the front wall of the hopper and at the rocking radius of the front end of the rocking tube. After the operation of feeding the viscous fluid is completed, the front end of the rocking tube is lifted to allow the front end to communicate with the opening, and then a washing tube is attached to the opening, and a filling is filled in the washing tube. A method for cleaning a suction and discharge valve of a high-viscosity fluid pump, characterized in that a high-pressure fluid is supplied into a cleaning pipe to push a filling into a rocking pipe to be pressure-fed, thereby cleaning the inside of the rocking pipe over its entire length. 2. An opening corresponding to the diameter of the front end side of the oscillating tube is provided at a position away from the two suction and discharge ports on the front side wall of the hopper and at a oscillating radius position at the front end of the oscillating tube; A clutch is provided between a connection shaft fixed to the rocking tube and protruding through the front wall of the hopper and an operation lever for rotating the connection shaft, and connected by turning the operation lever and turning the clutch ON / OFF. A high-viscosity fluid pump for cleaning a suction / discharge valve, wherein the shaft is rotated in one direction to move a front end of the swinging tube to the opening position, and a cleaning tube is connected to the opening. apparatus. 3. An output shaft of a driving device for rotating the connecting shaft is connected to an end of the connecting shaft via a clutch, so that rotation of the connecting shaft by the driving device and rotation of the connecting shaft by an operation lever can be switched. 3. The cleaning device for a suction and discharge valve of a high-viscosity fluid pump according to claim 2. 4. A cleaning pipe provided with a taper-shaped sealing device at the tip thereof and a bracket for connecting a mounting / dismounting operation cylinder, wherein the mounting / dismounting operation cylinder can be attached to the swinging pipe through an opening. The cleaning device for a suction and discharge valve of a high-viscosity fluid pump according to claim 2 or 3, wherein a tube is used.