JP2585147Y2 - Concrete pump gate housing - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gate housing for a concrete pump.

[0002]

2. Description of the Related Art A gate housing of a conventional concrete pump will be described with reference to FIG.
The concrete cylinder 3 having 1 'is a gate housing, and the concrete cylinders 2 and 2' are open in the gate housing 3.

[0003] Reference numeral 4 denotes an oscillating pipe (oscillating valve) provided in the gate housing 3, a hydraulic cylinder 5 for oscillating the oscillating pipe 4, and a gate cylinder 6 through the gate housing 3 through an opening. The communicating hopper 7 is a discharge pipe attached to the gate housing 3, and the gate housing 3 is provided between the concrete cylinders 2, 2 'and the discharge pipe 7, and the discharge pipe 7 is oscillated. It communicates with the pipe 4.

In the gate housing of the conventional concrete pump shown in FIG. 4, the hydraulic cylinder 5 is operated to swing the swinging pipe 4 so that the concrete cylinder 2 and the discharge pipe 7 communicate with each other. Then, the concrete piston 1 of the concrete cylinder 2 is advanced to discharge the concrete in the concrete cylinder 2 to the concrete cylinder 2 → oscillating pipe 4 → discharge pipe 7 and the concrete piston 1 ′ of the concrete cylinder 2 ′ is retracted. The concrete in the hopper 6 is sucked into the concrete cylinder 2 'through the gate housing 3.

Next, the hydraulic cylinder 5 is operated, and the swing tube 4
Is swung in the opposite direction to communicate the concrete cylinder 2 ′ with the discharge pipe 7. Next, the concrete piston 1 'of the concrete cylinder 2' is advanced to discharge the concrete in the concrete cylinder 2 'to the concrete cylinder 2' → oscillating pipe 4 → discharge pipe 7, and
The concrete piston 1 of the concrete cylinder 2 is retracted, and the concrete in the hopper 6 is sucked into the concrete cylinder 2 through the gate housing 3.

[0006] Then, the above operation is repeated to discharge the concrete continuously.

[0007]

The conventional concrete pump gate housing shown in FIG. 4 has the following problems. That is, when the swing tube 4 swings, the concrete in the swing direction front side of the swing tube 4 is scraped up, and the hopper 6 is swung.
Pushed up inside. On the other hand, since the concrete having high viscosity and poor fluidity flows into the space behind the rocking tube 4 by only the negative pressure generated in the rocking direction, the space is not sufficiently filled, and the concrete is not sufficiently filled. Is not sufficiently sucked from the hopper 6 through the gate housing 3 into the concrete cylinder 2 (or 2 '), so that the suction efficiency of the concrete pump is reduced and the concrete is separated, the quality is deteriorated. In the case of, it may be blocked.

[0008] This is due to the structure of the gate housing 3. That is, the upper part of the gate housing 3 is
Concrete, which is completely open to the outside and is removed by the rocking of the rocking tube 4, is pushed up by the hopper 6, and the gap on the rear side in the rocking direction generated by the rocking of the rocking tube 4 is removed. This is because the structure is not forcibly buried with concrete.

The present invention has been made in view of the above-mentioned problems, and has as its object to provide a concrete pump gate housing capable of improving the suction efficiency of a concrete pump and stably pumping concrete. The point is to try.

[0010]

In order to achieve the above-mentioned object, the concrete pump gate housing of the present invention has a hopper mounted on the upper end of the gate housing and the insides thereof are provided at the upper end of the gate housing. A lid having a predetermined length L is attached to the front upper part of the gate housing from the front part of the concrete cylinder side of the gate housing toward the discharge pipe, and the front part of the opening part is connected with the lid part. Cover and form a series of curved surfaces in the direction parallel to the concrete cylinder center line from the front of the concrete cylinder side of the gate housing to the hopper, from both sides of the cover to both sides of the gate housing. Is formed in a curved surface having a curvature R in a direction perpendicular to the center line of the concrete cylinder.

[0011]

In the concrete pump gate housing of the present invention, the hopper is attached to the upper end of the gate housing as described above, and the insides thereof communicate with each other through the opening provided in the upper end of the gate housing. A lid part having a predetermined length L is attached to the front upper part of the gate housing from the front side toward the discharge pipe, and the front part of the opening is covered with the lid part. A cross-section in the direction parallel to the center line of the concrete cylinder from the hopper to the hopper is formed as a series of curved surfaces, and the cross-section from both sides of the lid to both sides of the gate housing in a direction perpendicular to the center line of the concrete cylinder Is formed on a curved surface having a curvature R, and when the oscillating tube swings, the crushed tube on the front side in the swinging direction of the oscillating tube is displaced. Since lied forcibly fed along the lid portion of the gate housing into the gap portion of the swing direction rear side of the oscillating tube, return amount of concrete into the hopper is reduced.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A concrete pump gate housing according to the present invention will be described with reference to FIGS. 1, 2 and 3 which show an embodiment shown in FIGS. 1, 2 and 3. The concrete pistons 1, 1 'and 2, 2' are concrete pistons 1, 1 '. A concrete cylinder having a hopper, 3 a gate housing, 6 a hopper,
Are attached to the upper end of the gate housing 3, and the insides of the gate housing 3 are communicated with each other through an opening 8 provided at the upper end of the gate housing 3. The predetermined length L toward
Is mounted on the front upper part of the gate housing 3 and the front part of the opening 8 is covered with the lid part 3 ′. The cross-sectional shape in the direction parallel to the center line of the concrete cylinder is formed into a series of curved surfaces, and the cross-sectional shape in the direction perpendicular to the center line of the concrete cylinder from both sides of the lid 3 ′ to both sides of the gate housing 3 is defined as a curvature R.
Formed on the curved surface.

The discharge pipe 7 is mounted on the gate housing 3. Reference numeral 4 denotes an oscillating pipe (oscillating valve) provided in the gate housing 3, and reference numeral 5 denotes a hydraulic cylinder for oscillating the oscillating pipe 4, and the gate housing 3 comprises a concrete cylinder 2, 2 'and a discharge pipe 7. A discharge pipe 7 is provided between the swing pipe 4 and the discharge pipe 7. Next, the operation of the gate housing of the concrete pump shown in FIGS.

The concrete cylinder 2 and the discharge pipe 7 are communicated by operating the hydraulic cylinder 5 to swing the swing pipe 4. Then, the concrete piston 1 of the concrete cylinder 2 is advanced to discharge the concrete in the concrete cylinder 2 to the concrete cylinder 2 → oscillating pipe 4 → discharge pipe 7 and the concrete piston 1 ′ of the concrete cylinder 2 ′ is retracted. The concrete in the hopper 6 is sucked into the concrete cylinder 2 'through the gate housing 3.

Next, the hydraulic cylinder 5 is operated, and the swing tube 4 is moved.
Is swung in the opposite direction to communicate the concrete cylinder 2 ′ with the discharge pipe 7. Next, the concrete piston 1 'of the concrete cylinder 2' is advanced to discharge the concrete in the concrete cylinder 2 'to the concrete cylinder 2' → oscillating pipe 4 → discharge pipe 7;
The concrete piston 1 of the concrete cylinder 2 is retracted, and the concrete in the hopper 6 is sucked into the concrete cylinder 2 through the gate housing 3.

Then, the above operation is repeated to discharge the concrete continuously. When the swing tube 4 swings, the concrete that has been displaced on the front side in the swing direction of the swing tube 4 is moved along the lid 3 ′ of the gate housing 3 into the gap 3 a on the rear side in the swing direction of the swing tube 4. Forcibly sent to
Reduce the amount of concrete returning to hopper 6.

[0017]

As described above, the gate housing of the concrete pump according to the present invention has the hopper attached to the upper end of the gate housing and the interiors thereof communicate with each other through the opening provided at the upper end of the gate housing. A lid of a predetermined length L is attached to the front upper part of the gate housing from the front part of the concrete cylinder toward the discharge pipe,
The front part of the opening is covered with the lid part, and a sectional shape in a direction parallel to the center line of the concrete cylinder from the front part of the concrete cylinder side of the gate housing to the hopper is formed in a series of curved surfaces. The cross section in the direction perpendicular to the center line of the concrete cylinder extending from both sides of the portion to both sides of the gate housing is formed into a curved surface having a curvature R. When the swing tube swings, the swing tube swings. The concrete that has been displaced on the front side is forcibly fed along the lid of the gate housing into the gap on the back side in the swinging direction of the swing tube, so the amount of concrete returning to the hopper can be reduced, and the concrete pump can be sucked. Efficiency can be improved.

When the swing tube swings as described above,
The concrete that has been displaced on the front side of the rocking tube in the rocking direction is forcibly sent along the lid of the gate housing into the gap on the rear side of the rocking tube in the rocking direction. And concrete can be pumped stably.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view showing an embodiment of a gate housing of a concrete pump of the present invention.

FIG. 2 is a vertical sectional side view of the gate housing.

FIG. 3 is a vertical sectional front view taken along line AA of FIG. 2;

FIG. 4 is a partially cutaway perspective view showing an example of a gate housing of a conventional concrete pump.

[Explanation of symbols]

1,1 'concrete piston 2,2' concrete cylinder 3 gate housing 3 '
Lid 4 Swinging tube 6 Hopper 7
Discharge pipe

Claims (1)

(57) [Scope of request for utility model registration] A hopper is attached to an upper end of a gate housing, and the insides of the hoppers communicate with each other through an opening provided at an upper end of the gate housing. Length L
The lid is attached to the front upper part of the gate housing, and the front part of the opening is covered with the lid to cover the front of the gate housing from the concrete cylinder side front to the hopper in a direction parallel to the center line of the concrete cylinder. Concrete characterized in that a cross-sectional shape is formed into a series of curved surfaces, and a cross-sectional shape in a direction perpendicular to the center line of the concrete cylinder from both sides of the lid portion to both side portions of the gate housing is formed as a curved surface having a curvature R. Pump gate housing.