KR101960483B1 - Concrete pump having a vibration reducing device - Google Patents

Abstract

The present invention relates to a concrete core pump having a vibration reduction control device. The concrete core pump having the vibration reduction control device according to the present invention includes: a hopper in which concrete is filled; a pair of concrete cylinders which are connected to the hopper, and which suck the concrete from the hopper and discharges the same while having a concrete piston movably disposed therein; a pair of drive cylinders which interact with the concrete cylinders and in which a drive piston is movably provided therein; and a vibration reduction control device which is for reducing the vibration that may be generated by surge pressure caused by the switching of the drive cylinders when the concrete is sucked or discharged by the concrete cylinders. Accordingly, the vibration that may be generated due to an unnecessary surge pressure can be reduced.

Description

Technical Field [0001] The present invention relates to a concrete pump having a vibration reduction control device,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete core pump having a vibration reduction control device, and more particularly, to a concrete core pump having a vibration reduction control device capable of reducing vibration (or noise) that can be generated due to unnecessary surge pressure To a concrete core pump having a control device.

FIG. 1 is a structural view of a conventional concrete pump truck, and FIG. 2 is a view showing a boom operated in FIG.

Referring to these drawings, a conventional concrete pump truck 1 serves to supply concrete to a working position. The concrete pump truck 1 may include a boom 11, a boom rotation part 20, and an outrigger 30. [

The boom 11 is a portion extending from the position where the vehicle body is fixed to the working position. As shown in Figs. 1 and 2, the boom 11 is made of a foldable structure. As will be described later in detail, the boom 11 is formed by a combination of a boom and an end boom, and an end hose is connected to an end of the end boom.

The boom rotation part 20 is connected to the boom 11 and rotates the boom 11 to a working position. And the boom rotation portion 20 is manufactured by a combination of a motor and a gear.

The outrigger 30 is a structure that is provided so as to extend laterally of the vehicle body so as to be firmly fixed from the ground. The outrigger (30) includes a jack cylinder (31) extending vertically toward the ground.

The boom 11 having such a structure is operated as shown in FIG. 2, for example, and works to supply concrete to a working position. At this time, the concrete cylinder (CONCRETE CYLINDER) and the drive cylinder (DRIVE CYLINDER) are provided for the suction or discharge of the concrete.

On the other hand, surge pressure due to the switching of the drive cylinder may occur when the concrete cylinder sucks or discharges the concrete for the operation, and vibration (or noise) may be generated when such unnecessary surge pressure is generated It is necessary to develop technology to solve this problem.

Korea Patent Office Application No. 10-1996-0082687

An object of the present invention is to provide a concrete core pump having a vibration reduction control device capable of reducing vibration (or noise) that can be generated due to unnecessary surge pressure when the core pump is operated.

For the above-mentioned purpose, the present invention provides a concrete core pump including a vibration reduction control device having the following structure.

HOPPER filling concrete;

A pair of concrete cylinders (CONCRETE CYLINDER) connected to the hopper, in which the concrete is sucked and discharged from the hopper, and a concrete piston is movable inside the concrete cylinder;

A pair of drive cylinders which interact with the concrete cylinder and in which a drive piston is movable; And

And a vibration reduction control device for reducing vibrations that can be generated by surge pressure caused by the switching of the drive cylinder when the concrete is sucked or discharged by the concrete cylinder.

The vibration reduction control device includes:

At least one center sensor for sensing whether or not the drive piston has reached a center, at least one of the pair of drive cylinders;

At least one vibration sensor (REDUCTION SENSOR) provided in at least one of the pair of drive cylinders adjacent to the center detection sensor for generating a signal for controlling the surge pressure applied to the drive piston, ; And

A vibration sensor for generating a signal for switching the pumping stroke of the pump PUMP to control the speed of the drive piston, the vibration sensor being provided in at least one of the pair of drive cylinders adjacent to the vibration reduction control sensor And may include at least one changeover sensor (CHANGE OVER SENSOR).

The vibration reduction control sensors may be arranged on both sides of the center detection sensor as a reference and the switching sensors may be arranged on the outside of the pair of vibration reduction control sensors as a pair.

The vibration reduction control device includes:

A control unit for controlling the flow rate of the pump supplied to the drive cylinder to move the drive piston to control the speed of the drive piston based on the center sensor, the vibration reduction control sensor, and the input signal from the change- The control unit may further include a control unit.

Wherein,

(SLOW STOP MODE) advances to a point where the speed of the drive piston is decelerated, and the flow rate of the pump is controlled so that the FAST START MODE can proceed at a point where the speed of the drive piston increases. Can be controlled.

According to the present invention, vibration (or noise) that can be generated due to unnecessary surge pressure when the core pump is operated can be reduced. Therefore, the working environment can be improved.

1 is a structural view of a conventional concrete pump truck.
Fig. 2 is a view showing a state in which the boom is operated in Fig.
3 is a three-dimensional image of a concrete core pump having a vibration reduction control apparatus according to an embodiment of the present invention.
4 is a perspective view of FIG.
Fig. 5 is a schematic partial internal structure of Fig. 4. Fig.
6 is a layout diagram of the sensors.
7 is a view showing the role of the drive piston according to the section.
8 is a diagram for explaining the basic operation of the vibration reduction control device.
9 is a control block diagram of a concrete core pump having a vibration reduction control apparatus according to an embodiment of the present invention.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. In the drawings, like reference numerals are used to denote like elements throughout the drawings, even if they are shown on different drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

In describing the components of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are intended to distinguish the components from other components, and the terms do not limit the nature, order, order, or number of the components. When a component is described as being "connected", "coupled", or "connected" to another component, the component may be directly connected or connected to the other component, Quot; intervening "or that each component may be" connected, "" coupled, "or " connected" through other components.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

Fig. 3 is a perspective view of a concrete core pump having a vibration reduction control apparatus according to an embodiment of the present invention, Fig. 4 is a perspective view of Fig. 3, Fig. 5 is a schematic partial internal structure of Fig. FIG. 8 is a view for explaining the basic operation of the vibration reduction control device, and FIG. 9 is a view for explaining a vibration reduction according to an embodiment of the present invention. Fig. 7 is a control block diagram of a concrete core pump having a control device.

Referring to these drawings, a concrete core pump 100 according to an embodiment of the present invention is capable of reducing vibrations (or noise) that can be generated due to unnecessary surge pressure at the time of operation. The hopper (HOPPER, A concrete cylinder (CONCRETE CYLINDER) 120, a drive cylinder (DRIVE CYLINDER) 130, and a vibration reduction control device 150.

Referring primarily to Figures 3-5, the hopper 110 is a structure, or container, that fills the concrete. The inlet region of the hopper 110 is provided with a grill 111 for preventing foreign matter from entering. A lid 112 is rotatably provided on one side of the hopper 110.

The concrete cylinder 120 is connected to the hopper 110. The concrete cylinder 120 is an actuator that sucks concrete from the hopper 110 and discharges it to the S-type valve 116 side, that is, a double acting cylinder. These concrete cylinders 120 are applied as a pair.

The S-type valve 116 is an S-shaped valve for connecting the concrete discharged from the concrete cylinder 120 to the discharge pipe 117. The discharge pipe 117 is a concrete discharge pipe.

A concrete piston (CONCRETE PISTON) 121 is provided in the concrete cylinder 120. The concrete piston 121 is reciprocally moved in the concrete cylinder 120 and plays a role of sucking or discharging the concrete.

The drive cylinder 130 is an actuator that reciprocates linearly using the hydraulic energy of a main oil pump (not shown), and drives an internal drive piston 131 therein. The drive cylinder 130 is a double acting cylinder which may be called a main cylinder (MAIN CYLINDER). The drive cylinders 130 are also applied as a pair.

A water box may be provided between the concrete cylinder 120 and the drive cylinder 130.

The main sensor 132 is a sensor for sensing the position of the drive piston 131 in the drive cylinder 130.

As described above, when the concrete cylinder 120 sucks or discharges the concrete for work, a surge pressure due to the switching of the drive cylinder 130 may be generated. In the past, such unnecessary surge pressure (Or noise) could be caused.

To solve this problem, a concrete core pump vibration reduction control device 150 may be applied. In other words, the vibration reduction control apparatus 150 according to the present embodiment reduces the vibration that can be generated by the surge pressure caused by the switching of the drive cylinder 130 when the concrete cylinder 120 sucks or discharges the concrete . Here, vibration is regarded as a term including noise.

The vibration reduction control device 150 includes a center sensor 161, first and second vibration reduction control sensors 162a and 162b, first and second changeover sensors 162a and 162b, , 163a and 163b, and a control unit 170. [

The center detection sensor 161 is provided in at least one of the pair of drive cylinders 130 and detects whether or not the drive piston 131 has reached the center. The sensed signal is transmitted to the controller 170.

The first and second vibration reduction control sensors 162a and 162b are provided on at least one of the pair of drive cylinders 130 adjacent to the center detection sensor 161, And serves to generate a signal for controlling the pressure. In other words, the first and second vibration reduction control sensors 162a and 162b generate a signal for advancing the slow stop mode and the fast start mode (FAST START MODE). Therefore, the positions of the first and second vibration reduction control sensors 162a and 162b should be suitably selected as two ports through testing. The signals sensed by the first and second vibration reduction control sensors 162a and 162b are transmitted to the controller 170. [

The first and second switching sensors 163a and 163b are provided in at least one of a pair of drive cylinders 130 adjacent to the first and second vibration reduction control sensors 162a and 162b, 131) for controlling the speed of the pump (PUMP) (not shown) to generate a signal for switching the pumping stroke. The signals sensed by the first and second switching sensors 163a and 163b are also transmitted to the controller 170. [

In the present embodiment, first and second vibration reduction control sensors 162a and 162b are arranged on both sides of the center detection sensor 161 as a reference, and a pair of first and second vibration reduction And the first and second switching sensors 163a and 163b are disposed outside the control sensors 162a and 162b in a pair. In other words, in the present embodiment, five sensors 161, 162a, 162b, 163a and 163b can be applied to the drive cylinder 130 of A as shown in Fig.

However, the scope of the present invention is not limited to these matters. In other words, only three drive cylinders 130 may be applied to the drive cylinder 130 according to equipment conditions, and two drive cylinders 130 and two drive cylinders 130 may be reduced or changed.

This is because a pair of drive cylinders 130 marked with A and B are interlocked with each other so that when one of the drive pistons 131 moves to the left, the other drive piston 131 moves to the right.

On the other hand, based on the input signals from the center detection sensor 161, the first and second vibration reduction control sensors 162a and 162b, and the first and second switching sensors 163a and 163b, And controls the flow rate of a pump (not shown) for supplying the drive cylinder 130 to move the drive piston 131 to control the speed of the drive piston 131.

At this time, the control unit 170 causes the SLOW STOP mode to proceed to the point where the speed of the drive piston 131 is decelerated, and the FAST START mode when the speed of the drive piston 131 is increased. (Or noise) is controlled by controlling the flow rate of the pump so that the flow rate (MODE) can be progressed.

The control unit 170 that performs this role may include a central processing unit 171 (CPU), a memory 172 (MEMORY), and a support circuit 173 (SUPPORT CIRCUIT).

In the present embodiment, the central processing unit 171 is provided with the center detection sensor 161, the first and second vibration reduction control sensors 162a and 162b, and the input from the first and second switching sensors 163a and 163b Various computers that can be industrially applied to control the flow rate of a pump (not shown) supplied to the drive cylinder 130 to control the speed of the drive piston 131 based on the signal and to move the drive piston 131 Lt; / RTI > processors.

The memory 172 (MEMORY) is connected to the central processing unit 171. The memory 172 may be a computer readable recording medium and may be located locally or remotely and may be any of various types of storage devices such as, for example, a random access memory (RAM), a ROM, a floppy disk, May be at least one or more memories.

The support circuit 173 (SUPPORT CIRCUIT) is coupled with the central processing unit 171 to support the typical operation of the processor. Such a support circuit 173 may include a cache, a power supply, a clock circuit, an input / output circuit, a subsystem, and the like.

In this embodiment, the control unit 170 controls the input signals from the center detection sensor 161, the first and second vibration reduction control sensors 162a and 162b, and the first and second switching sensors 163a and 163b (Not shown) for controlling the speed of the drive piston 131 to drive the drive piston 131 to control the flow rate of the pump (not shown) ). ≪ / RTI > Typically, a software routine may be stored in memory 172. The software routines may also be stored or executed by other central processing units (not shown).

Although processes according to the present invention are described as being performed by software routines, it is also possible that at least some of the processes of the present invention may be performed by hardware. As such, the processes of the present invention may be implemented in software executed on a computer system, or in hardware such as an integrated circuit, or in combination of software and hardware.

Hereinafter, the operation of the present invention will be described with reference to Figs. 7 and 8. Fig.

When the PUMPING ON signal is input to pump the concrete, the drive piston 131 in the drive cylinder 130 is operated. The speed of the drive piston 131 may be proportional to the RPM and the pump discharge amount.

When the drive piston 131 enters the piston speed measuring section L2 at the piston speed compensation section L1, the movement time at which the drive piston 131 is moved from the moment when the drive piston 131 enters the center CENTER of the drive cylinder 130 is measured . That is, the movement time of the drive piston 131 is measured until the center detection sensor 161 detects the drive piston 131.

The measured travel time calculates the arrival time from the center to the second switching sensor 163b, for example, by referring to the ratio created by the database DB.

The flow rate signal delay time is subtracted from the calculated time, and the speed reduction start position of the drive piston 131 is calculated to output the discharge amount (OUTPUT_RAMP TIME application). Therefore, the deceleration of the drive piston 131 progresses in the piston deceleration control section L3, thereby reducing vibration (or noise).

Then, when the second switching sensor 163b detects the drive piston 131, the deceleration of the drive piston 131 is stopped, and the decelerated speed compensation is performed for a predetermined time from that point of time.

For reference, a description will be given of the actual speed control of the drive piston 131 and the loss compensation according to the speed control with reference to FIG.

As described above, the present invention realizes a reduction in the amount of impact of the drive piston 131 while compensating for the loss due to speed control and speed control of the drive piston 131.

For example, when the OUTPUT PV is above the middle voltage (2.5V), the motor is decelerated to a maximum of 5V, and the compensation voltage is reduced by the difference between 5V and the output OUTPUT PV to compensate for the loss of the drive piston 131 speed have.

OUTPUT When the PV is below the middle voltage, deceleration control is performed by the difference between the maximum output (OUTPUT) PV and 0V, and the compensation voltage is reduced to 0V to compensate.

For reference, the speed of the drive piston 131 is applied in the above-described manner at the middle and low speeds, but since the voltage required for compensation can not be generated in the case of the high speed (0 V), the deceleration control and the loss rate Can be compensated.

According to the present embodiment having the structure and function as described above, it is possible to reduce vibration (or noise) that can be generated due to unnecessary surge pressure when the core pump 100 is operated. Therefore, the working environment can be improved.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. It is therefore intended that such modifications or alterations be within the scope of the claims appended hereto.

100: core pump 110: hopper
111: Grill 112: Cover
116: S-type valve 117: Discharge pipe
120: Concrete cylinder 121: Concrete piston
130: drive cylinder 131: drive piston
132: main sensor L1: piston speed compensation section
L2: Piston speed measurement section L3: Piston deceleration control section
140: Water box 150: Vibration reduction control device
161: center detection sensor 162a: first vibration reduction control sensor
162b: second vibration reduction control sensor 163a: first switching sensor
163b: second switching sensor 170:

Claims (5)

HOPPER filling concrete;
A pair of concrete cylinders (CONCRETE CYLINDER) connected to the hopper, in which the concrete is sucked and discharged from the hopper, and a concrete piston is movably disposed therein;
A pair of drive cylinders which interact with the concrete cylinder and in which a drive piston is movable; And
And a vibration reduction control device for reducing vibrations that can be generated by a surge pressure caused by the switching of the drive cylinder when the concrete is sucked or discharged by the concrete cylinder,
The vibration reduction control device includes:
At least one center sensor for sensing whether or not the drive piston has reached a center, at least one of the pair of drive cylinders;
At least one vibration sensor (REDUCTION SENSOR) provided in at least one of the pair of drive cylinders adjacent to the center detection sensor for generating a signal for controlling the surge pressure applied to the drive piston, ;
A vibration sensor for generating a signal for switching the pumping stroke of the pump PUMP to control the speed of the drive piston, the vibration sensor being provided in at least one of the pair of drive cylinders adjacent to the vibration reduction control sensor At least one changeover sensor (CHANGE OVER SENSOR); And
A control unit for controlling the flow rate of the pump supplied to the drive cylinder to move the drive piston to control the speed of the drive piston based on the center sensor, the vibration reduction control sensor, and the input signal from the change- And a control unit
Wherein the control sensors for vibration reduction are arranged on both sides of the center detection sensor as a reference and the switching sensors are disposed on the outside of the pair of vibration reduction control sensors as a pair,
Wherein the control unit causes the SLOW STOP mode to proceed to a point at which the speed of the drive piston is decelerated and the FAST START MODE to proceed at a point where the speed of the drive piston increases, And the flow rate of the pump is controlled. delete delete delete delete

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