JPH091539A - Concrete placer - Google Patents

Abstract

PURPOSE: To provide a concrete placer capable of easily washing away ready mixed concrete adhered to the inner surface of the shoulder part of a pressure vessel body, visually observing the cleaning state, and eliminating the high-place operation of the cleaning. CONSTITUTION: The base end of a pipe 31 protruding outward is fixed to a pressure vessel body 30 for storing ready mixed concrete to communicate within the body 30, and the outer end of the pipe 31 can be sealed by a cap 36. At the time of cleaning the interior of the body 30, the cap 36 is removed from the base end of the pipe 31, and a water jet nozzle is inserted into the body 30 via the pipe 31.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete placer used for storing fresh concrete in a concrete pumping device.

[0002]

2. Description of the Related Art In recent years, high-flowing ready-mixed concrete has attracted attention as part of the streamlining of concrete product manufacturing plants.
It has been practiced to place high-fluid fresh concrete on a form using a concrete pumping device.

An example of a concrete pumping device which has been conventionally used will be described with reference to FIG. 5. Reference numeral 1 is a concrete placer, and the concrete placer 1 has a charging port 2 in an upper portion and a pressure feeding port 3 in a lower portion. And a gate 5 that hermetically closes the inlet 2 by air pressure.

Reference numeral 6 denotes a compressed air supply device. The compressed air supply device 6 takes in air from a filter 7 and compresses it, and an air tank for storing the air compressed by the air compressor 8. 9, an air supply valve (open / close valve) 10 for flowing air from the air tank 9 to the outside, and a drive device (motor) 11 for driving the air compressor 8.

Reference numeral 12 is an air supply pipe, and the air supply pipe 12 has
Check valve 13, air supply valve (open / close valve) 14, pressure adjusting valve 15,
The pressure gauge 16 is provided in order from one end to the other end.

One end of the air supply pipe 12 is connected to the air supply valve 10 of the compressed air supply device 6, and the other end of the air supply pipe 12 is connected to the upper part of the pressure container body 4 of the concrete placer 1. And the air supply valve 1 of the compressed air supply device 6 described above.
When the air supply valve 14 is opened in the state where 0 is opened, compressed air is supplied to the inside of the pressure vessel main body 4.

Reference numeral 17 denotes an air supply pipe, and one end of the air supply pipe 17 is connected to the portion of the air supply pipe 12 described above which is located between the check valve 13 and the air supply valve 14.

Reference numeral 18 denotes a supply / exhaust switching valve (manual operation switching type 3-port 2-position switching valve).
Has an air supply port, an exhaust port, and an air supply / exhaust port, and the other end of the air supply pipe 17 is connected to the air supply port.

Reference numeral 19 denotes a silencer, which is connected to the exhaust port of the supply / exhaust switching valve 18.

Reference numeral 20 denotes an air supply / exhaust pipe. One end of the air supply / exhaust pipe 20 is connected to the air supply / exhaust port of the air supply / exhaust switching valve 18, and the other end of the air supply / exhaust pipe 20 is connected to the concrete placer 1. When the supply / exhaust switching valve 18 is set to one of the switching positions with the supply valve 10 of the compressed air supply device 6 being opened, the gate 5 is connected to the closing mechanism of the gate 5.
When the inlet 2 of the concrete placer 1 is airtightly closed by the above, and the air supply / exhaust switching valve 18 is set to the other switching position, the air pressure applied to the closing mechanism of the gate 5 is increased via the muffler 19. It is designed to be released to atmospheric pressure.

Reference numeral 21 is an exhaust pipe, and the exhaust pipe 21 includes:
An exhaust valve (open / close valve) 22 is provided.

One end of the exhaust pipe 21 is connected to the upper portion of the pressure vessel body 4 of the concrete placer 1, and the other end of the exhaust pipe 21 is connected to the muffler 23. When is released, the air pressure applied to the inside of the pressure vessel body 4 is released to atmospheric pressure.

Reference numeral 24 is a supply valve (open / close valve), and the supply valve 24 is connected to the pressure feed port 3 of the concrete placer 1.

Reference numeral 25 is a flexible casting pipe, one end of which is connected to the supply valve 24, and the other end of which is inside the mold 26. The ready-mixed concrete 27 is placed at a position where it can be placed.

The operation of the concrete pumping apparatus shown in FIG. 5 will be described below.

When pouring fresh concrete 27 onto the formwork 26, the air supply valves 10 and 14 and the supply valve 24 are closed, and the air supply / exhaust switching valve 18 is switched to the other switching position (gate 5). Setting that the closing mechanism communicates with the muffler 19),
From the injection port 2 to the inside of the pressure vessel main body 4, ready-mixed concrete 2
Throw in 7.

After pouring the ready-mixed concrete 27, after confirming that the exhaust valve 22 is closed, the supply / exhaust switching valve 18 is switched to one switching position (the state where the supply pipe 17 communicates with the closing mechanism of the gate 5). ), The air supply valve 10 is opened and the gate 5 is airtightly closed.

Further, the air supply valve 14 is opened to open the pressure vessel body 4.
When the supply valve 24 is opened after increasing the internal pressure of the supply container 24, the ready-mixed concrete 27 inside the pressure vessel main body 4 causes the supply valve 24,
It is delivered to the outside through the placing pipe 25, and the ready-mixed concrete 27 is placed inside the form 26.

[0019]

[Problems to be Solved by the Invention] Fresh concrete 27 is put into the interior of the pressure vessel main body 4 and the fresh concrete 2
When the operation of feeding 7 into the inside of the formwork 26 and then inserting the fresh concrete 27 into the pressure vessel body 4 again is repeated several times, the fresh concrete 27 thickly adheres to the inner wall of the pressure vessel body 4. Since the storage capacity of the pressure vessel main body 4 is reduced, by cleaning the inside of the pressure vessel main body 4,
It is necessary to wash away the fresh concrete adhering to the inner wall of the pressure vessel body 4.

Therefore, after the pressure feeding work is completed, the gate 5 is removed from the charging port 2, the water injection nozzle is inserted from the charging port 2 into the inside of the pressure vessel main body 4, water is injected onto the inner wall of the pressure vessel main body 4, and the inner wall is injected. We are washing away the adhering green concrete.

However, as shown in FIG. 5, the pressure vessel main body 4 is a vessel having a large diameter at the upper portion and a smaller diameter toward the lower portion. Then, the ready-mixed concrete adhering to the inner surface of the shoulder portion A is hard to drop, and the cleaning state cannot be visually observed, and sufficient cleaning cannot be performed even by using the rotary nozzle.

Further, in order to carry out the water injection from the charging port 2 of the pressure vessel body 4, it is necessary to construct a work scaffold in the vicinity of the pressure vessel body 4.

The present invention solves such a problem and provides a concrete placer in which fresh concrete adhering to the inner surface of the shoulder of the pressure vessel body can be easily washed away and the washing state can be visually checked. That is the purpose.

[0024]

In order to achieve the above object, according to the present invention, a charging port for charging ready-mixed concrete into the inside of the pressure container body is provided at an upper portion of the pressure container body capable of storing fresh concrete. In a concrete placer having a delivery port for delivering fresh concrete to the outside of the pressure vessel body at a lower portion of the pressure vessel body, the side wall of the pressure vessel body provided at a vertically intermediate portion of the pressure vessel body is penetrated. The cleaning pipe is provided with a cap that can close the end of the cleaning pipe on the side of the counter pressure vessel main body.

In addition to the above-mentioned structure, the cap is provided with a plug that comes into close contact with the end of the cleaning pipe on the pressure vessel body side when the cleaning pipe is closed by the cap.

[0026]

In the concrete placer of the present invention, when the end of the washing pipe on the side opposite to the pressure vessel body is released by the cap, the inside and outside of the pressure vessel body are washed at the vertical middle portion of the pressure vessel body. Communicate via a pipe.

This makes it possible to easily wash water from the outside with respect to the inner surface of the pressure vessel main body and visually check the inner surface of the pressure vessel main body.

Further, when the cap is provided with a plug, the plaque closes the base end portion of the cleaning pipe when the cap is mounted on the cleaning pipe.

[0029]

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

FIG. 1 is a side view of an embodiment of the present invention, in which a concrete placer 1 has a pressure vessel main body 30 having a charging port 2 at an upper portion and a pressure feeding port 3 at a lower portion, and the above-mentioned charging operation. And a gate 5 that hermetically closes the mouth 2 by air pressure.

As shown in the enlarged cross-sectional view of the main part of FIG. 2, the pressure vessel main body 30 is provided with a plurality of holes 32 at which the pipes (washing pipes) 31 can be tightly fitted, and each of the holes 32 has a hole 32. A pipe 31 is fitted so as to project to the outside of the pressure vessel body 30, and the base end of the pipe 31 is fixed to the pressure vessel body 30 by welding 33.

The end face of the fixed pipe 31 on the base end side is located substantially flush with the inner face of the pressure vessel body 30.

The outer diameter of the pipe 31 is, for example, 5 in nominal diameter.
A pressure vessel body having a wall thickness of about 0 A to 80 A and a thickness of the pressure vessel body 30 is used.

A male screw 34 is engraved on the outer peripheral surface on the outer end side of the pipe 31 projecting to the outside of the pressure vessel main body 30, and has a packing 35 on the inner surface and an internal thread on the inner peripheral surface. The outer end of the pipe 31 is sealed by screwing the provided cap 36 into the male screw 34.

A rod 37 is fixed to the center of the inner surface of the cap 36 and penetrates the packing 35 to project toward the base end of the pipe 31. The rod 37 has a projecting end portion made of rubber, soft synthetic resin or the like. A plug 38 having an outer diameter that is in close contact with the inner surface of the pipe 31 is fixed.

When the cap 36 is screwed into the male screw 34 of the pipe 31 and the outer end of the pipe 31 is sealed with the packing 35, the surface of the plug 38 facing inward of the pressure vessel main body 30 is It is desirable that the pressure vessel body 30 and the pressure vessel body 30 are arranged so as to be substantially flush with each other.

Next, the operation of the present invention will be described.

During the work of pouring ready-mixed concrete by the concrete placer 1, the caps 36 are attached to the outer end sides of all the pipes 31.

As a result, the raw concrete poured into the pressure vessel main body 30 is prevented from entering the inside of the pipe 31 by the plug 38 which is in close contact with the inner surface of the pipe 31, and the raw concrete is put inside the pipe 31. Is designed to prevent clogging.

Even if there is ready-mixed concrete flowing between the periphery of the stopper 38 and the inner surface of the pipe 31 toward the outer end of the pipe 31, the cap 36 sealing the outer end of the pipe 31. Leakage of fresh concrete from the outer end of the pipe 31 to the outside of the pressure vessel body 30 is prevented.

When the inside of the pressure vessel main body 30 is washed, the cap 38 is removed together with the cap 36 from the outer end of the pipe 31 after completion of the pressure feeding work, and the water injection nozzle is removed from the outer end of the pipe 31 as shown in FIG. 39 is inserted into the pressure vessel body 4, and water is jetted from the water jet nozzle 39 to the inner wall of the pressure vessel body 4 to wash away the fresh concrete adhering to the inner wall.

At this time, by using the pipe 31 at the upper position of the pressure vessel main body 30, the fresh concrete adhering to the inner surface of the facing shoulder portion A can be surely washed off, and the pipe 31 can be looked into. It is possible to visually check the cleaning state.

Further, since the pipe 31 is attached to the side surface of the pressure vessel main body 30, it is possible to carry out the washing work safely without working at a high place.

After the cleaning work is completed, the cap 36 is attached to the outer end of the pipe 31 again, and the fresh concrete is pumped.

FIG. 4 is an enlarged cross-sectional view of an essential part of another embodiment of the present invention. In the figure, the parts designated by the same reference numerals as those in FIGS. 1 to 3 represent the same parts.

In this embodiment, instead of the above-mentioned cap 36 (see FIGS. 1 and 2), a cylindrical cap adapter 40 connected to the outer end of the pipe 31 and the cap adapter 40. Cap 41 capable of closing the outer end
And are used.

A female screw 42 is engraved on the inner peripheral surface of the base end portion of the cap adapter 40, and the female screw 42 is engraved on the outer peripheral surface of the outer end portion of the pipe 31. It is screwed to.

Further, on the outer peripheral surface of the outer end portion of the cap adapter 40, there is formed a groove 43 extending in the circumferential direction of the outer peripheral surface and forming a concave curved surface with respect to the axis of the cap adapter 40.

The cap 41 has a packing 35 on its inner surface and is formed so as to be fitted onto the outer end of the cap adapter 40.

Further, the cap 41 has the above-mentioned recessed portion 4
A plurality of handles 44 each having a convex curved surface corresponding to the concave curved surface of No. 3 at one end are pivotally supported by pins 45 extending in a direction intersecting the axis of the cap 41.

The pin 45 is eccentric with respect to the convex curved surface of one end of the handle 44, and the handle 44 is positioned in a direction substantially orthogonal to the axis of the cap 41 as shown by the chain double-dashed line in FIG. Then, the cap 41 can be freely attached to and detached from the cap adapter 40.

On the other hand, the cap 41 is replaced with the cap adapter 4
When the handle 44 is rotated to a position substantially parallel to the axis of the cap 41 as shown by the solid line in FIG. Is fitted to the concave curved surface of the cap adapter 40, the packing 35 is closely attached to the outer end of the cap adapter 40, and the cap 4
1 is fixed to the cap adapter 40.

Further, at the center of the inner surface of the cap 41, a rod 37 penetrating the packing 35 and projecting to the base end side of the pipe 31 is fixed, and the projecting end portion of this rod 37 is made of rubber or soft synthetic material. A plug 38 made of resin or the like and having an outer diameter that is in close contact with the inner surface of the pipe 31 is fixed.

Also in the present embodiment having the above-mentioned structure, the same operational effect as that of the embodiment shown in FIGS. 1 to 3 can be obtained.

Further, in this embodiment, the cap 41 is moved to the cap adapter 40 by operating the handle 44.
Cap adapter 4 of cap 41
Since the constraint on 0 can be released, the effect that the cap 41 can be attached and detached in a short time is obtained.

The concrete placer of the present invention is not limited to the above-mentioned embodiments, and it goes without saying that various modifications can be made without departing from the gist of the present invention.

[0057]

As described above, according to the concrete placer of the present invention, various excellent effects as described below can be obtained.

(1) In any of the concrete placers according to the first and second aspects of the present invention, when the closing of the end portion of the cleaning pipe by the cap on the side opposite to the pressure vessel body is released, the pressure vessel body Since the inside and outside of the pressure vessel main body communicate with each other at the intermediate portion in the vertical direction via the washing pipe, it is possible to easily wash water from the outside with respect to the inner surface of the pressure vessel main body and to visually check the inner surface of the pressure vessel main body.

(2) In the concrete placer according to claim 2 of the present invention, since the base end portion of the cleaning pipe is closed by the plaque, the inflow of fresh concrete from the pressure vessel main body into the cleaning pipe is prevented. It

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of a concrete placer of the present invention.

FIG. 2 is an enlarged sectional view of an essential part showing an embodiment of the concrete placer of the present invention.

FIG. 3 is a cross-sectional view showing a state where cleaning is performed in an embodiment of the concrete placer of the present invention.

FIG. 4 is an enlarged sectional view of an essential part showing another embodiment of the concrete placer of the present invention.

FIG. 5 is a system diagram showing an example of a concrete pumping device.

[Explanation of symbols]

 1 Concrete placer 2 Input port 3 Outlet port 30 Pressure vessel main body 31 Pipe (washing pipe) 36 Cap 38 Plug (plug) 41 Cap

Claims (2)

[Claims] 1. A charging port for charging ready-mixed concrete into the inside of the pressure container main body is provided at an upper part of the pressure container main body capable of storing the ready-mixed concrete, and a charging port outside the pressure container main body is provided at a lower part of the pressure container main body. In a concrete placer provided with a delivery port for delivering concrete, a washing pipe penetrating a side wall of the pressure vessel body provided at an intermediate portion in the vertical direction of the pressure vessel body, and an end of the washing tube on the side opposite to the pressure vessel body. A concrete placer comprising a cap capable of closing a part. 2. The concrete placer according to claim 1, wherein the cap is provided with a plug that comes into close contact with the end of the cleaning pipe on the pressure vessel body side when the cleaning pipe is closed by the cap.