KR0148672B1 - Oscillating tube cleaning control device for oscillating valve type concrete pump - Google Patents

Abstract

The rocking pipe and the transport pipe should be cleaned automatically.

A limit switch for checking the position when the swing pipe 6 is positioned at one suction discharge port 2 is provided, and the coupling shaft 8 fixed to the swing pipe 6 and the hydraulic motor 18 are disconnected. Limit switches LS-1 and LS-2 are provided at the stroke end of the retracting side and the advancing side of the clutch hydraulic cylinder 20 for sliding the clutch member 17 for sliding. When the swing pipe 6 is lifted up by the hydraulic motor 18, a limit switch for checking the position thereof is installed, and the washing pipe 16 is advanced in a position where the swing pipe 6 is lifted up.

A limit switch (LS-5) is installed at the retracting side stroke end of the hydraulic cylinder (22) for cleaning and pushing the pulling tube. The hydraulic motor (18) is rotated in reverse by operating the limit switch (LS-5). ) Is lowered.

Description

Oscillating pipe cleaning control device of oscillating valve type large concrete pump

1 is a schematic side view illustrating an embodiment of the present invention.

2 is a cross-sectional view showing a clutch that connects and disconnects both the connecting shaft and the hydraulic motor in FIG.

3 is a schematic plan view of the connecting shaft and the hydraulic motor when the clutch is connected.

4 is a front view of a rocking cylinder for rocking the rocking tube.

5 is a hydraulic circuit diagram of a hydraulic motor, a hydraulic cylinder for closing the clutch and a hydraulic cylinder for pushing and pulling the cleaning tube.

6 is an explanatory diagram showing a part of a control panel.

7 is an electric circuit diagram for controlling the hydraulic circuit of FIG.

8 is a schematic diagram of the electric circuit of the concrete pump operation.

9 is a cross-sectional view showing a rocking tube of a conventional rocking valve type large concrete pump.

FIG. 10 is a sectional view from the X direction of FIG.

* Explanation of symbols for main parts of the drawings

1: Hopper 2: Suction discharge port

6: rocking tube 8: connecting shaft

9: operation lever 10, 11: rocking cylinder

12: transport pipe 16: cleaning pipe

17: clutch member 18: hydraulic muffler

18a: output shaft 20: hydraulic cylinder for closing the clutch

22: hydraulic cylinder for cleaning tube push and pull

34, 35, 36: electromagnetic conversion four-way valve

LS-0, LS-1, LS-2, LS-3, LS-4, LS-5: Limit Switches

PB1, PB2: push switch

[Industrial use]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control apparatus for automatically cleaning a swing pipe and a connected transport pipe as a suction discharge valve of a concrete pump which sucks and discharges large concrete in a hopper.

[Prior art]

Suction discharge valves for converting the concrete in the hopper to be sucked and discharged by the hopper of the country include conventional sliding valve type and swing valve type.

As the inhalation discharge valve of the latter rocking valve type, one having a configuration as schematically shown in FIGS. 9 and 10 is known. That is, the two concrete discharge cylinders 3 are horizontally corresponding to the two suction discharge ports 2 at the front side of the hopper 1 provided with two suction discharge ports 2 side by side in the lower part of the front surface. And the piston 4 housed in the concrete pressure cylinder 3 is integrally connected to the piston of the main cylinder (not shown) via the rod 5 so that the two The pistons 4 in the concrete pumping cylinder 3 are moved forward and backward. On the other hand, in the hopper (1) accommodates the S-shaped rocking tube (6) through which one end is rotated freely through the back of the hopper (1), and the other end of the rocking tube (6) by mounting a sealing ring (7) A connecting shaft 8 having the sealing ring 7 coincides with the two suction discharge ports 2 and allowing the front side of the hopper 1 to pass through the front side of the swing tube 6 freely and rotate freely. The control lever 9 is integrally mounted to the end of the connecting shaft 8, and the operation lever 9 is operated by mutual expansion and contraction of the two swing cylinders 10 and 11. (9) The oscillation pipe 6 is made to oscillate around the center of the axis of the coupling shaft 8 via the coupling shaft 8. Reference numeral 12 denotes a conduit.

When suctioning and discharging the concrete 13 in the hopper 1 by operating the suction discharge valve of the conventional concrete pump, the swinging tube 6 is swung in the middle of the concrete 13 in the hopper 1 and the swinging pipe ( When the front end of 6) is located at one suction discharge port 2, the piston 4 of the concrete pressure cylinder 3 on the suction discharge port 2 side is advanced to advance the concrete 13 sucked up to now. While discharging through the swing tube (6), the separate concrete pressure cylinder (3) retracts the piston (4) to suck the concrete (13) in the hopper (1), and then swings the swing tube (6). By converting to a separate suction discharge port (2) to advance the piston (4) of the concrete pressure injection cylinder (3) on the suction discharge port (2) at the same time, the concrete (13) is added to another concrete pressure injection cylinder (3) To inhale and repeat these It is to effect conversion of the suction discharge of concrete.

As described above, the concrete pump 13 allows the concrete 13 in the hopper 1 to be pushed through the swing tube 6 by advancing and retracting the pistons 4 in the two concrete lead-feeding cylinders 3 with each other. In the case where the concrete feeding operation is finished, the concrete remaining in the transport pipe 12 and the swing pipe 6 is removed. In this case, the connection portion between the swing pipe 6 and the transport pipe 12 is removed. (14) to remove the remaining concrete in the swing pipe (6), and the concrete remaining in the transport pipe (12) to fill the cleaner sponge, etc. in the removed transport pipe and to connect the flange for cleaning to the air or water pressure It is pushed out and washed.

[Problem to Solve Invention]

However, in the conventional method of removing concrete remaining in the rocking pipe and the transport pipe, the transport pipe 12 is removed from the connecting portion 14 to remove residual concrete from the tip of the rocking pipe 6 to connect the cleaning flange. In addition, there is a concern that the periphery of the swing tube tip on the outside of the hopper 1 may be polluted, and much effort is taken to remove the connection portion 14 and to remove the connection flange 6 from the cleaning flange. Is consuming.

Therefore, the two suction discharge ports 2 of the front side wall of the hopper 1 for the purpose of simple operation and to remove the concrete in a short time and to prevent the concrete to be removed from scattering around. The opening 15 corresponding to the diameter of the swing tube 6 is installed at an upper position which is a swing radius position of the front end of the swing tube 6 at a position away from the swing tube 6 and after the end of the concrete feeding operation, 6) is rotated upward so that the front end of the swing tube 6 is brought into communication with the opening 15. When the front end of the swing tube 6 communicates with the opening, the cleaning tube 16 is urged out of the hopper 1 through the opening. The oscillating tube 6 and the conveying tube 12 by moving the inside of the oscillating tube 6 and the conveying tube 12 that are filled with a high-pressure fluid by communicating with the copper tube 6 and filled in the washing tube 16. To clean the inside of the Gene yaw been filed cleaning method of copper is recently proposed (Japanese Patent Application Hei No. 3-299600 No.).

The present invention aims to automate the cleaning operation in the method of cleaning the rocking pipe and the transport pipe, which has been filed above.

[Means for solving the problem]

The present invention installs a limit switch (LS-0) for confirming that the oscillating pipe that is oscillated through the oscillating shaft is located in one suction discharge port in order to solve the above problems, the hydraulic pressure for lifting the end of the connecting shaft over the oscillating pipe Limit switches (LS-1, LS-2) are installed at the stroke end of the retracting side and the forward side of the hydraulic cylinder for insertion and disconnection of the clutch connecting or disconnecting the motor, and the connecting shaft is rotated by the hydraulic motor. Limit switches (LS-3, LS-4) are installed to confirm that the copper pipe is lifted up and returned to its original lower position. Also, it is connected to the rocking pipe by advancing the cleaning pipe when it is lifted up with the rocking pipe. The limit switch LS-0 is operated by installing a limit switch LS-5 at the retracting side stroke end of the cleaning cylinder pushing and pulling hydraulic cylinder which retracts or retracts the cleaning tube. An electronically-converting four-way valve that changes the hydraulic line to advance the hydraulic cylinder when the LS-4 is operated, as well as retracting the hydraulic cylinder for clutch insertion and disconnection when the push-up start push switch is pressed. Electron which converts the hydraulic line to rotate the hydraulic motor in the upward direction when the limit switch LS-1 is operated and to rotate the hydraulic motor in the downward direction when the LS-5 is operated. It is a structure provided with the electromagnetic conversion four-way valve which changes a hydraulic line so that a hydraulic cylinder for pushing and pulling a cleaning pipe may be advanced backwards by a change of the change 4-way valve and a switch for setting or releasing a cleaning pipe.

In addition, when the electric circuit is powered on, the concrete pump is stopped and the shaking pipe is lifted up so that the concrete pump is operated when the limit switch LS-3 is operated.

[Action]

When the swing tube is swung to the position of one suction discharge port, the limit switch LS-0 is activated.

At this time, when the lift start push switch is pushed up, the hydraulic cylinder for inserting and closing the clutch automatically retracts and slides the clutch member to connect the connecting shaft and the hydraulic motor. When the limit switch (LS-1) is operated at the retracting stroke end of the hydraulic cylinder for clutch insertion and disconnection, the hydraulic motor rotates and the oscillation pipe rises. When it is confirmed by the limit switch LS-3 that the swing pipe rises up, the solenoid of the lift side of the hydraulic motor is lifted. Subsequently, when the switch is operated to set the washing tube, the washing cylinder pushing and pulling hydraulic cylinder is extended and the washing tube is connected to the swinging tube, and the washing is performed.

In addition, when the swing pipe is lifted up and the limit switch (LS-3) is operated, the concrete pump is operated so that the remaining concrete in the concrete conveying cylinder can be discharged into the hopper, thereby enabling cleaning in the concrete conveying cylinder. Done.

EXAMPLE

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

1 to 4 show an outline of an embodiment of the present invention, which is the same as that shown in Japanese Patent Application Laid-Open No. 3-299600, and has a hopper having two suction exposure openings 2 installed side by side on the front side. (1) freely swings the oscillating tube 6 in the oscillating tube 6 and allows the connecting shaft 8 fixed in the middle of the oscillating tube 6 to pass through the front wall of the hopper 1 so that the connecting shaft The rocking tube 6 is swung left and right in the hopper 1 by turning right and left by swinging the left and right swing cylinders 10 and 11 through the middle operation lever 9. (8) the splines 25 and 26 of the end and the boss 24 are connected to the clutch member 17 or to the spline 25 of the end of the connecting shaft 8 and the spline 27 of the output shaft 18a. The clutch member 17 is slid to connect to the end of the connecting shaft 8 and then detach it. The motor 18 is fixed in a horizontal state to a frame 19 which is fixedly supported on the concrete pumping cylinder 3, and the clutch for connecting the rod end to the clutch member 17 on the frame 19 is cut and held hydraulically. The cylinder 20 is provided, and at the position of the swing radius of the swing tube 6, an opening 15 slightly larger than the diameter of the swing tube 6 is provided, and one end of the swing tube 6 is pressed. Both sides of the cleaning pipe 16, which is in communication with the swinging pipe 6, are guided by the guide device 21 so as to be able to retreat forward in a horizontal state, and push the forward retreat to be carried out by the hydraulic cylinder 22 for pulling. In this configuration, the limit switch LS- for checking that the swing levers 10 and 11 are set to a position communicating with the suction discharge port 2 on the predetermined side by swinging the operation lever 9 from side to side. 0), for example, the furnace of one swing cylinder 11 The mounted. In addition, the limit switch is connected to the retracting side stroke end and the forward side stroke end of the hydraulic cylinder 20 for inserting and closing the clutch for sliding and moving the clutch member 17 for connection and disconnection between the connecting shaft 8 and the hydraulic motor 18, respectively. Limit switches LS-3 and LS-4 which are installed when LS-1 and LS-2 are installed and the operating piece 23 fixed to protrude to the hydraulic motor 18 side of the clutch member 17 approaches. ) Is installed on the frame 19 for supporting the hydraulic motor 18 at a position corresponding to the position (LS-0) of the swing pipe 6 and the opening 15 to be lifted up as shown in FIG. 3. In addition, a limit switch LS-5 is provided at the retreat side stroke end of the pushing-out hydraulic cylinder 22 of the cleaning tube 16.

In FIG. 2, reference numeral 28 is a bearing.

5 shows a hydraulic circuit, in which the hydraulic line 30 in the hydraulic source 29 is connected to the hydraulic cylinder 31 for the hopper door via a conversion four-way valve, and therein, the hydraulic motor for stirring the stirrer in the hopper. In the structure connected to the 32 via the electromagnetic conversion 4-way valve 33, the said hydraulic-line 30 is connected to the hydraulic motor 18 for raising and lowering the fluctuation pipe 6, and the electromagnetic conversion 4-way valve ( 34 is connected to the hydraulic cylinder 20 for clutch insertion and closing together with the connection box via an electromagnetic conversion four-way valve 35, and the electromagnetic conversion four-way valve 36 to the hydraulic cylinder 22 for cleaning and pushing the pull tube. Is connected to each solenoid (SOL.33, SOL.34, SOL.31, SOL.32, SOL.41, SOL.42) of each electromagnetic conversion four-way valve (34, 35, 36). The hydraulic cylinder for forward rotation, reverse rotation and clutch insertion and closing of the hydraulic motor 18 by Is to stretch the respective operations of seminiferous tubule push pull the hydraulic cylinder 22 of the 20 is automatically in line.

6 shows a part of the control panel 37, where SW-24 is the on-off switch of the power supply, SW-25 is the switch for auto-manual conversion, and SW-26 is when the SW-25 is switched by manual operation. SW-27 switch for switching the hydraulic cylinder for clutch and interruption to be used, SW-27, likewise, turns the switch for the right and left rotations of the hydraulic motor 18 for the up and down, which are used when the SW-25 is converted manually. -30 is a conversion switch for setting or releasing the cleaning tube 16, PB1 connects the clutch member 17 to the hydraulic motor 18 side, and rotates the hydraulic motor 18 to turn the swing tube 6 upward. The push switch for instructing to raise, PB2, is a push switch for connection for returning the hydraulic motor 18 and for bringing the clutch member 17 to the operation lever 9 side.

In addition, FIG. 7 shows the limit switches LS-0, LS-2, LS-3, LS-4, and LS-5 shown in FIGS. 1 to 4 and the respective four directions of electron conversion shown in FIG. Solenoids (SOL.33, SOL.34, SOL.31, SOL.32, SOL.42, SOL.41) of the valve, and the switches (SW-24, SW-25, SW-26, An electrical circuit diagram comprising SW-27, SW-30 and push switches PB1, PB2, wherein the relay (X-101) is excited by the operation of the limit switch (LS-0) so that the a contact (X-101) Closed and the relay (X-102) is excited by the operation of the limit switch (LS-1) so that the a contact (X-102) is closed, the b contact (X-102) is opened, and the limit switch (LS-2) The relay (X-103) is excited by the operation of the b contact (X-103) to open and the relay (x-104) is excited by the operation of the limit switch (LS-3) to open the b contact (X-104). In addition, the relay (x-105) is excited by the operation of the limit switch LS-4, the a contact (X-105) is closed, the b contact (X-105) is opened, In addition, the relay (X-106) is excited by the operation of the limit switch (LS-5) so that the b contact point 106 is opened. When the push switch (PB1) is pressed, the relay (X-12) is excited. Contact a (X-12) is closed, b contact (X-12) is opened, and when the push switch (PB2) is pressed, the relay 14 is excited to close the a contact (X-14) and b contact (X14). ) Is intended to open.

In addition, FIG. 8 shows an outline of the electric circuit of the concrete pump operation, in which the switch SW-24 in the electric circuit shown in FIG. 7 enters the circuit of the relay X-1. The contact b (X-200) and the swing tube (6) of the relay (X-200), which are opened when the (X-200) is excited, are lifted up from the hydraulic motor (18) to the established position to limit the switch (LS-). 3) is activated and relay (X-104) is installed in parallel.When relay (X-1) of concrete pump operation is excited, the contact a (X-1) is closed and solenoid (SOL.1) is excited. The operation of the concrete pump is made. Here, SOL.1 has shown the solenoid which is an solenoid valve for unloading the main relief valve of the hydraulic circuit which drives the concrete piston 4.

When the pumping operation of the concrete is finished and it is necessary to clean the inside of the swing pipe 6 and the transport pipe 12, first, the left and right swing cylinders 10 and 11 are operated to move the swing pipe 6 to the suction discharge port on the left side. We match to position of (2). Subsequently, the power switch SW-24 on the control panel 37 is turned on so that the auto-manual switching switch SW-25 is placed in the automatic direction. When the switch (SW-24) for power is turned on and the relay (X-200) is excited, the b contact (X-200) of the relay (X-200) in the electric circuit of the concrete pump operation shown in FIG. Since it is open, the relay X-1 of the concrete pump operation is demagnetized, and the a contact point X-1 of the concrete pump operation is locked to prevent the operation of the concrete.

When it is confirmed by the operation of the limit switch LS-0 that the rocking tube 6 exists in a predetermined position, the relay X-101 is excited by the operation of the limit switch LS-0, and the a contact X -101) is closed. When the push switch PB1 on the control panel 37 is pressed, the relay X-12 is excited in FIG. 7, the a contact X-12 is closed, and the b contact X-12 is opened, thereby inserting the clutch. Since the closing cylinder 10 is closed and the b contact (X-12) is opened, the solenoid SOL. 31 of the electromagnetic conversion four-way valve 35 of the closing cylinder 20 is inserted into the clutch. As a result, the electromagnetic conversion four-way valve 35 is switched to the port a side, and since the hydraulic pressure is supplied from the hydraulic line 30 to the rod side pressure chamber of the hydraulic cylinder 20 for clutching and closing, the hydraulic pressure for clutching and closing The cylinder 20 is retracted so that the clutch member 17 slides to fit the output shaft 18a of the hydraulic motor 18 so that the output shaft 18a of the hydraulic motor 18 is connected to the connecting shaft 8. .

When the limit switch LS-1 is operated when the hydraulic cylinder 20 for closing and closing the clutch reaches the stroke end, the relay (X-102) is excited and the b contact (X-102) is opened. The solenoid SOL. 31 of the electromagnetic conversion four-way valve 35 is demagnetized and the a contact X-102 is closed so that the solenoid SOL. 33 of the electromagnetic conversion four-way valve 34 is excited. As a result, the electromagnetic conversion four-way valve 34 is converted to the port a side so that the hydraulic motor 18 is rotated in the lifting direction above the swing pipe by the hydraulic pressure in the hydraulic line 30.

The swinging tube 6 is rotated by a predetermined angle and lifted up to the position of the cleaning tube 16, and the operating piece 23 fixed to the clutch member 17 comes to the position of the limit switch LS-3. When the LS-3) is activated, the relay (X-104) is excited and the b contact (X-104) is opened, so that the solenoid (SOL.33) is demagnetized. At this time, because the a contact (X-104) of the concrete pump operation circuit is closed, the relay (X-1) which is dropped due to the opening of the b contact (X-200) of the relay (X-200) is excited. The a contact (X-1) of 1) is closed, and the concrete pump can be operated. In this case, since the swing pipe 6 is lifted up and is in an upper position, both of the suction discharge ports 2 are opened and the cleaning operation in the concrete pressure cylinder 3 can be easily performed.

Next, the switch SW-30 of the cylinder 22 for pushing and pulling the washing tube is set to the set side, and the solenoid SOL. 41 of the electromagnetic conversion four-way valve 36 is excited to energize the electromagnetic conversion four-way valve 36. Is converted to the port (b) side. As a result, the hydraulic pressure from the hydraulic line 30 is supplied to the head pressure chamber of the hydraulic cylinder 22 for pushing and immersing the washing tube, and the front end of the washing tube 16 and the oscillating tube 6 are placed on the front surface of the hopper 1. This state is maintained by connecting via the opening 15 provided in the wall.

When the cleaning tube 16 is connected to the swinging tube 6, a filling material (such as a sponge) is inserted into the cleaning tube 16, and high pressure air is introduced into the cleaning tube 16 through the air inlet 38 of the lid. The filled contents are blown into the rocking tube 6 or the transport tube 12 in the washing tube 16 to be cleaned. After the washing of the swing tube 6 is completed, the switch SW-30 of the hydraulic cylinder 22 for pushing and pulling the washing tube is pushed to the release side. As a result, the relay (X-17) is excited, and the electromagnetic conversion four-way valve (36) is converted to the port (a) side. The hydraulic pressure is supplied to the rod-side pressure chamber of the hydraulic cylinder (22) for cleaning and pushing. The articles of incorporation 16 is withdrawn.

When the cleaning tube push and pull cylinder 22 is retracted and the limit switch LS-5 is operated at the stroke end, the relay X-106 is excited to close the a contact X-106 and close the b contact X. -106 is opened, the circuit of relay X-17 is cut off and the solenoid SOL.42 is demagnetized. Thus, when the push switch PB2 for returning the hydraulic motor 18 for swinging pipe up and down is pressed, the relay X-14 is excited to close the a contact X-14, and the b contact X-14. This opens and the solenoid SOL. 34 of the electromagnetic conversion four-way valve 34 is excited. As a result, the electromagnetic conversion four-way valve 34 is converted to the port (b) side so that the hydraulic motor 18 is rotated in the direction of lowering the swing tube 6 and is fixed to the clutch member 17. ) Comes to the position detected by the limit switch (LS-4), the LS-4 operates to excite the relay (X-105) and the b contact (X-105) is opened to open the electromagnetic conversion four-way valve (34). Solenoid (SOL. 34) of the element, and the contact a (X-105) is closed and the solenoid (SOL. 32) of the electromagnetic conversion four-way valve 34 for converting the hydraulic cylinder 20 for clutch insertion and closing Become a woman. When the solenoid SOL.32 is excited, the electromagnetic conversion four-way valve 34 is converted to the port b side, and the hydraulic pressure is supplied to the head side pressure chamber of the cylinder 20 for clutching and closing. ) Is extended so that the clutch member 17 slides (slides) so that the connecting shaft 8 and the output shaft 18a of the hydraulic motor 18 are separated.

When the hydraulic cylinder 20 for inserting and closing the clutch is advanced and reaches the stroke end, the limit switch LS-2 is activated to excite the relay X-103, and the b contact X-103 is opened to operate The solenoid SOL. 32 of the conversion four-way valve 35 is demagnetized, and the relay x-14 is decomposed, and the solenoid SOL. 34 of the electromagnetic conversion four-way valve 34 is decomposed.

In addition, the above description is when the SW-25 is automatically placed, but when it is set to the manual side, the solenoid (SOL.31) is changed by switching the switch (SW-26) to shorten the operation of the inlet cylinder 20 for clutch insertion and interruption. Or SOL. 32 and the hydraulic motor 18 switches the rotational direction by the switch SW-27 to excite the solenoid SOL. 33 or SOL. 34.

[Effects of the Invention]

As described above, according to the rocking tube cleaning control apparatus of the rocking valve-type concrete pump of the present invention, the rocking tube swings through the connecting shaft to limit the limit switch LS-0, which confirms that it is located at one suction outlet. It is installed on the cylinder side, and puts a clutch for connecting or disconnecting the end of the connecting shaft to the lifting hydraulic motor above the swing pipe, and the limit switch (LS-1, LS-) at each stroke end of the retraction side and the forward side of the hydraulic cylinder for disconnection. 2) and also install the limit switch (LS-3, LS-4) in the up position and the original down position by rotating the connecting shaft by the hydraulic motor. A limit switch (LS-5) is installed at the retreating side stroke end of the hydraulic cylinder for pushing and pulling the washing tube which is connected to the swinging tube or retracted by advancing the washing tube. When the push switch of the start is pressed in the state where the limit switch (LS-0) is operated, the clutch is retracted and the hydraulic line for switching is retracted, and the hydraulic line is changed to advance the hydraulic cylinder when the SL-4 is operated. To rotate the hydraulic motor in the upward direction when the LS-5 is operated, while rotating the hydraulic motor in the downward direction when the LS-5 is operated. Equipped with an electro-conversion four-way valve for converting hydraulic lines and an electro-conversion four-way valve for converting hydraulic lines so that the hydraulic cylinder for pushing and pulling the cleaning pipe forwards and retracts by changing the set or release switch of the cleaning pipe. In order to clean the rocking tube, the rocking tube can be lifted upwards and connected to the tubing for cleaning. It can be finished only by switch operation, and it can achieve the excellent effect that it does not need to be done while checking it visually. Also, when the electric circuit of the rocking tube cleaning is turned on, the concrete pump is stopped and the rocking pipe is raised upward to limit. By allowing the concrete pump to operate when the switch LS-3 is activated, the effect of simply cleaning the inside of the concrete pumping cylinder while the oscillating pipe is lifted can also be achieved.

Claims (2)

In the rocking tube cleaning control device for a swing valve type large concrete pump, a limit switch (LS-0) for confirming that a rocking tube swinging through a rocking shaft is located at one suction outlet port, and an end portion of the linking shaft is pivoted. Restriction switch (LS-1, LS-2) and the connecting shaft are rotated by the hydraulic motor at the stroke end of the retraction side and the forward side of the hydraulic cylinder for insertion and disconnection of the clutch for connecting or disconnecting to the lifting hydraulic motor. Limit switches (LS-3, LS-4) for confirming that the swing tube is lifted up and returned to its original lower position, and the washing tube is advanced when the swing tube is lifted up and connected to the swing tube. When the limit switch LS-5 and the limit switch LS-0 are actuated to the retracting side stroke end of the cleaning cylinder pushing and pulling hydraulic cylinder for retracting the cleaning tube, An electronically converting four-way valve for changing the hydraulic line to advance the hydraulic cylinder when the LS-4 is operated when the raising start push switch is pressed (on operation), the hydraulic cylinder for retracting and the clutch is retracted, and the limit Electromagnetic change to rotate the hydraulic motor in the upward direction when the switch LS-1 is operated in the upward direction, and to convert the hydraulic line to rotate the hydraulic motor in the downward direction when the LS-5 is operated. A swing valve type comprising a four-way valve and an electromagnetic conversion four-way valve for converting the hydraulic line so that the hydraulic cylinder for pushing and pulling the cleaning pipe forwards and retracts by changing the switch for setting or releasing the cleaning pipe. Control device for shaking pipe cleaning of concrete pump. In the electric circuit of the concrete pump operation, the contact b (X-200) opened when the power switch is turned on (on), and the contact a (X-104) closed when the limit switch LS-3 is operated. In parallel, and closes the contact a (X-1) installed in the electrical circuit by the excitation to the contact b (X-200) and the contact a (X-104) to enable the concrete pump to operate. , Rocking tube cleaning control device for a rocking valve-type concrete pump, characterized in that the solenoid (SOL.1) is installed in series by the non-excitation to open the contact (X-1) to disable the operation of the concrete pump.