JPS5917613Y2 - Concrete mixer truck with pump - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a concrete mixer truck with a pump that can pump concrete through a pipe without requiring a separate concrete pump.

Conventionally, when transporting ready-mixed concrete from a mixer truck to a construction site located at a high place or far away, a concrete pump truck is used to pump pipes, but depending on other construction conditions such as geography, high pressure using a concrete pump truck is required. If transportation is not required or if high-pressure transportation would be wasteful, the current practice is to transport fresh concrete to the pouring site using hand-pushed packets.

However, in the method of transporting by hand-pushed packets,
This has the problem of requiring a large number of personnel, resulting in a decrease in work efficiency.

Therefore, the present invention is equipped with a concrete pump on the mixer truck, which eliminates the need for a separate concrete pump truck.
Moreover, it is possible to use the built-in concrete pump to pump pipes to a relatively nearby pouring site at a pressure commensurate with the distance and height without requiring a large number of personnel.Moreover, if the pouring site is in a high place, it is possible to pipe ready-mixed concrete at a high pressure. To provide a concrete mixer truck with a pump capable of supplying concrete from a mixer drum to another concrete pump truck without going through an on-board concrete pump when it becomes necessary to pump the concrete.

Embodiments of a concrete mixer truck with a pump according to the present invention will be described below based on the drawings.

Figure 1 shows the first concrete mixer truck with pump.
An embodiment is shown in which 1 is a truck 2, and 3 is a mixer drum that is rotationally driven by the engine of the truck 2.

That is, the mixer truck 4 shown in FIG. 1 is what is called a truck mixer.

It goes without saying that the mixer drum 3 may be of the sloping type shown in the drawings, or of a vertical body type or a horizontal leg type.

A concrete pump 6 is installed on the trolley 1 in an empty space below the opening 5 through which fresh concrete is discharged after material input and crosstalk of the mixer drum 3.

When installing the truck 1 in a small area, the rear end of the truck 1 may be extended rearward.

The suction section 7 and the opening section 5 of this concrete pump 6 are connected with a switching valve 8 interposed therebetween.

The switching valve 8 has an external discharge port 10 to which a supply pipe 9 is connected so that fresh concrete can be supplied to another concrete pump truck without going through a concrete pump.

At the base of this external discharge port 10 is provided an on-off valve 8a that interlocks with the switching valve 8, as shown in FIG.

As the switching valve 8 and the on-off valve 8a, various valve devices other than the illustrated butterfly valve can be applied.

The concrete pump 6 has a cylinder 11 as shown in FIG.
An inner cylinder 12 is tightly fitted therein so as to be able to reciprocate, and each of the cylinder 11 and the inner cylinder 12 is provided with an inlet 13, 14 and an outlet 15, 16 at appropriate intervals in the axial direction.

The screws 1 to 17 are tightly fitted into the inner cylinder 12 so as to be able to reciprocate.

And cylinder 11. Seal materials 18 to 20 are attached to the inner cylinder 12 and screws 1 to 17, respectively, and the inner cylinder 12
A hydraulic cylinder 22 is connected to the piston 17 through a rod 21, and a hydraulic cylinder 22 is connected to the piston 17 through a piston rod 23.
Connect 4.

The switching valve 8 is connected to the suction port 13 of the cylinder 11, and the concrete transport pipe 25, which is laid to the pouring site, is connected to the discharge port 15 of the cylinder 11.

The suction port 13° 14 and the discharge port 16 are rectangular openings, respectively, so that the suction or discharge amount does not change excessively with respect to the movement of the inner cylinder 12 and the piston 17, and the suction port 14 of the inner cylinder 12 The discharge port 16 is formed to have a larger diameter than that of the cylinder 11.

26 and 27 are air vent holes.

Then, the switching valve 8 as shown in FIG. 2 is operated to communicate with the opening 5 and the concrete pump 6, and the on-off valve 8a is closed.

Next, the inner cylinder 12 is slid by the hydraulic cylinder 22,
The suction port 14 of the inner cylinder 12 and the suction port 13 of the cylinder 11
When they match and communicate, the piston 17 is moved in the extraction direction by the hydraulic cylinder 24 to suck in fresh concrete.

In this case, the discharge port 15.1 of the cylinder 11 and the inner cylinder 12
6 is in a disconnected state with no communication.

After this suction stroke is completed, the inner cylinder 12 is moved back by the hydraulic cylinder 22, and the discharge port 1 of the cylinder 11 and the inner cylinder 12 is
5.16 are communicated with each other, and the piston 17 is operated in the pushing direction by the hydraulic cylinder 24, so that the ready-mixed concrete in the inner cylinder 12 is discharged from the discharge port 15.16.

In this case, the suction port 13.1 of the cylinder 11 and the inner cylinder 12
4 is in a disconnected state with no communication.

When this discharge stroke is completed, the suction stroke is performed, and thereafter, the inner cylinder 12 and the piston 17 reciprocate in relation to each other to repeat the respective strokes in sequence.

When fresh concrete is to be supplied from the mixer drum 3 to another concrete pump vehicle, the switching valve 8 is switched so that the opening 5 and the external discharge port 10 communicate with each other, and the on-off valve 8a is opened.

Next, the concrete is supplied from the mixer drum 3 through an external discharge port 10 to another concrete pump truck, and the large volume and high pressure fresh concrete is pipe-transported by this concrete pump truck to the required pouring site.

When such a concrete pump 6 is used, it is possible to transport compact, relatively large capacity and high pressure fresh concrete 1 through a pipe, and it can be installed directly into an existing mixer truck without requiring any major design changes. Can be done.

3 and 4 show another embodiment, in which a squeeze type concrete pump 28 is mounted in place of the concrete pump 6 of the previous embodiment.

In this installation, the concrete pump 28 is arranged horizontally with respect to the traveling direction of the truck 1, and is configured to suck in from the upper part and discharge from the lower part.

As shown in FIG. 4, this concrete pump 28 includes a flexible pumping tube 31 inside a pump case 29 with a rubber pad 30 interposed therebetween, and the pumping tube 31 is handled by rollers 33 and 33 attached to a rotor 32. It is designed to be pressed like this.

The rotor 32 and rollers 33, 33 are rotationally driven by a hydraulic motor.

This hydraulic motor and other hydraulic devices 34 are installed in an empty space of the truck 1 near the concrete pump 28.

Further, the suction port 35 at the upper part of the pumping tube 31 is connected to the opening 5 of the mixer drum 3 via a blade type suction pump 36 and a switching valve 8.

Although the suction pump 36 is designed to be rotationally driven by a hydraulic pump in the hydraulic system 34, it is not necessarily required to be provided and may be provided as necessary.

That is, since the suction port 35 is provided at the upper part of the concrete pump 28, it is possible to sufficiently feed the fresh concrete into the concrete pump 28 using only its own weight.

A transport pipe 38 is connected to the discharge port 37 at the bottom of the concrete pump 28 for transporting the concrete to the pouring site.

It goes without saying that the inside of the pump case 29 is kept in a vacuum so that the pumping tube 31 can smoothly suck and extrude the fresh concrete.

Then, the switching valve 8 is switched to the suction port 35 side of the concrete pump 28, and the on-off valve 8a is closed.

Next, the rotor 32 is driven to rotate, and the pumping tube 31 is handled by the rollers 33 and 33 to pump the fresh concrete from the discharge port 37.

In this embodiment, the squeeze type concrete pump 28 is arranged horizontally with respect to the traveling direction of the cart 1, and the concrete pump 28 is provided with a suction port 35 at the top and a discharge port 37 at the bottom. Together with the simplified piping configuration between the concrete pump 28 and the mixer drum 3, the empty space below the opening 5 of the mixer drum 3 can be effectively utilized when installing the concrete pump 28.

In addition, in the present invention, each of the above-mentioned concrete pumps 6.
In addition to 28, it is also possible to mount various piston-type or even diaphragm-type concrete pumps in the empty space of the truck 1, and in this case, a switching valve 8 is interposed between the pump and the mixer drum 3. It is a good idea to try to use it more frequently.

As described above, according to the concrete mixer truck equipped with a pump according to the present invention, since the concrete pump is mounted on the mixer truck, the concrete pump can move the fresh concrete in the mixer drum to a comparatively nearby pouring site. Therefore, if large capacity and high pressure transportation is not required, there is no need to use a separate large capacity, high pressure concrete pump truck that is widely used. In addition, since it combines a mixer truck and a pump truck in one unit, it has excellent maneuverability, and since it is equipped with a switching valve, it can be used directly from the mixer drum to another concrete pump truck when large-capacity, high-pressure transportation is required. It is very convenient because it can be supplied.

In other words, since the concrete pump installed on a concrete mixer truck is of a type that forcibly sucks fresh concrete, no matter where the concrete pump is installed on the concrete mixer truck, other concrete pumps may be used in addition to the concrete pump. Even if an external discharge port is provided at a location such as a pump so that ready-mixed concrete can be supplied as appropriate, the concrete pump can be installed at any location as long as it can be discharged from the opening of the mixer drum under its own weight. Furthermore, the valve for switching between the on-board concrete pump and the external discharge port can be simple.

In other words, although ready-mixed concrete is a fluid, it has poor fluidity compared to liquids such as water and solidifies over time, which impedes fluidity and further complicates the inside of pipes. However, since concrete is forcibly inhaled by the concrete pump, for example, even if the concrete pump is installed at a higher location than the external discharge port, the valve that simply opens and closes the inside of the pipe at the connection part may not be used. is sufficient, there is no need for any incidental equipment such as feeding concrete into a pump, and there is no possibility that the ready-mixed concrete 1 will accumulate near the valve portion and cause clogging.

Moreover, to switch between the external discharge port and the concrete pump suction port, it is sufficient to use switching valves that operate in conjunction with each other so that when one opens, the other closes, and there is no need for any complicated valve mechanism such as piping. By simply switching the valve, concrete can be forcibly sucked from the mixer drum into the concrete pump, and can also be discharged to the outside from the external discharge port.

[Brief explanation of drawings]

The drawings show an embodiment of a concrete mixer truck with a pump according to the present invention, FIG. 1 is a perspective view of the first embodiment, FIG. 2 is a vertical sectional view of the concrete pump in FIG. 1, and FIG. 3 is a perspective view of the first embodiment. 4 is a perspective view showing the second embodiment, and FIG. 4 is a longitudinal sectional view of the concrete pump shown in FIG. 3.

Claims (1)

[Scope of utility model registration request] In a concrete mixer truck equipped with a pump, which is equipped with a concrete pump that forcibly sucks fresh concrete and then pumps it, the concrete mixer truck includes an opening for inputting and discharging materials from a mixer drum in the concrete mixer truck, and an inlet port of the concrete pump. The connection part with the external discharge port for supplying fresh concrete to another concrete pump vehicle, etc. is branched, and the suction port and the external discharge port are interlocked with each other so that when one is opened, the other is closed. A concrete mixer truck with a pump, characterized in that it is equipped with a switching valve that opens and closes.