JPS63304875A - Concrete casting apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a concrete pouring device used for supplying concrete into a predetermined concrete pouring space.

(b), Conventional technology Conventionally, in this type of concrete placing equipment, after placing concrete, when cleaning the concrete placing pipe that conveys the concrete to the discharge port of the placing equipment, the piping is disassembled. It was common practice to clean them individually.

(C) 0 Problems that the invention aims to solveHowever, disassembling the piping each time it is cleaned takes a lot of time and effort, and if the installation site is in a narrow place such as a shield tunnel, The drawback was that the workability gradually deteriorated.

SUMMARY OF THE INVENTION In order to eliminate the above-mentioned drawbacks, it is an object of the present invention to provide a concrete pouring device that does not require disassembling the concrete pouring pipe every time it is cleaned.

(d) Means for solving the zero problem, that is, the present invention has a cast casing (2) provided with a discharge port (2a) at the tip, and a switching valve is provided in the cast casing (2). (6) so as to be freely movable and driveable along the axis of the cast casing (2), and the connecting portions (llc,
12a) Concrete pouring pipe (12) and cleaning water supply pipe (11) formed to have substantially the same diameter (Dl) in the vicinity
concrete supply port (2c) and washing water supply port (2b)
), and further connects to the switching valve (6), when the switching valve (6) blocks the discharge port (2a), the washing water supply port (2b) and the concrete supply port (2c).
Communication holes (6a, 6b) are provided to communicate linearly with the connecting portions (11c, 12), and the communication holes (6a16b) are connected to the connecting portions (11c, 12).
m) is formed and configured to have substantially the same diameter (Dl).

Note that the numbers in parentheses are for convenience and indicate corresponding elements in the drawings, and therefore, this description is not limited to the descriptions on the drawings. The following r (el
The same applies to the column ``, action''.

(e) 0 effect With the above-described configuration, when the switching valve (6) closes the discharge port (2a), the cleaning water supply port (2b) and the concrete supply port (2C) are connected to the communication holes (6a, 6b). ), and the concrete casting pipe (12) and the washing water supply pipe (11) communicate with each other through the communication holes (6a, 6b).

(f), Example Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is a front cross-sectional view showing an embodiment of the concrete pouring device according to the present invention, FIGS. 2 to 5 are diagrams showing the operating state of the concrete pouring device shown in FIG. 1, and FIG. 7 and 8 are front sectional views showing another embodiment of the invention, and are diagrams showing the operating state of the concrete pouring device shown in FIG. 6.

As shown in FIG. 1, the concrete pouring device 1 has a cylindrical pouring casing 2, and the tip of the pouring casing 2 is fixed to a formwork 3. A discharge port 2a is formed at the tip, and the discharge port 2a is connected to the mold 3.
It opens into a concrete placement space 5 formed by. The cast casing 2 has a valve body 6 formed in a cylindrical shape.
A switching valve 6 having a diameter of D
A communication hole 6a is formed to extend diagonally and linearly through the switching valve 6. Further, seal rings 6b and 6c are fitted to both ends of the switching valve 6, and a rod 7a of a drive cylinder 7 is pivotally attached to the left end of the switching valve 6 in the figure to drive the drive cylinder 7. By doing so, the rod 7a is moved in the directions of arrows A and B with a predetermined stroke! ! IIm is moved.

In addition, a cleaning water supply port 2 is provided in the center of the cast casing 2.
b is formed, and the cleaning water supply port 2b has an inner diameter of D.
A cleaning water supply pipe 11 named l is connected. Further, a concrete supply port 2c is formed at a position substantially opposite to the cleaning water supply port 2b of the pouring casing 2, and a concrete pouring pipe 12 having an inner diameter of Dl is formed in the concrete supply port 2C. Connected. The other end of the concrete pouring pipe 12 extends to the left in the figure and is connected to concrete pumping means (not shown) such as a concrete pump.

Further, near the cleaning water supply port 2b of the cleaning water supply t11, a shirt valve 11a is provided so as to be slidable in the direction of the arrow A1B, and a hole 11b is bored through the jack valve 11a. ing. A driving cylinder 16 is provided on the left side of the shutter valve 11a in FIG.
1a is driven to move in the directions of arrows A and B.

Since the concrete pouring device 1 has the above configuration, when pouring concrete, the drive cylinder 16
is driven to move the shutter valve 11a in the direction of arrow B via the rod 16a.

Then, as shown in FIG. 2, the wash water supply pipe 11 is closed by the shack valve 11a, and the connection between the wash water supply pipe 11 and the pouring casing 2 is cut off. At the same time, drive cylinder 7
is driven to move the switching valve 6 in the direction of arrow A via the rod 7a. Then, the concrete supply port 2C and the discharge port 2a communicate with each other as shown in FIG. In this state, when the concrete 13 to be poured is supplied from the concrete pouring pipe 12 to the concrete supply port 2C,
The supplied concrete 13 is supplied to the concrete supply port 2
The concrete flows into the concrete pouring casing 2 from C, and is further injected into the concrete pouring space 5 in the formwork 3 from the discharge port 2a.

In this way, when a predetermined amount of concrete 13 is placed in the concrete placement space 5 and the work is completed, when cleaning the concrete placement pipe 12, the drive cylinder 7 is actuated as shown in FIG. to move the switching valve 6 in the direction of arrow B. Then, the switching valve 6 switches between the concrete supply port 2C and the concrete discharge port 2a of the pouring casing 2.
As shown in FIG.
The concrete remaining in between is pushed out to the concrete placement space 5 side, and the discharge port 2a is closed to the concrete placement space 5. Further, when the switching valve 6 moves in the direction B, the cleaning water supply port 2b and the concrete supply port 2C communicate with each other via the communication hole 6a formed in the switching valve 6. Therefore, the drive cylinder 16 is driven to move the shutter valve jla in the direction of arrow A in FIG. 4 via the rod 16a. Then, the hole 11b of the shatter valve 11a and the wash water supply pipe 11 are aligned, and the pouring casing 2 and the wash water supply pipe 1, which had been blocked by the shatter valve 11a, are aligned.
1 communicate with each other through the hole 11b. Therefore, as shown in FIG. 5, cleaning sponge balls 17 are fed under pressure in the direction of the casting casing 2 through the cleaning water supply pipe 11 using compressed air. Then, the sponge ball 17 reaches the cleaning water supply port 2b from the cleaning water supply pipe 11 through the hole 11b of the shatter valve 11a, further passes through the communication hole 6a of the switching valve 6, and enters the concrete casting pipe 12. The concrete 13 remaining in the concrete pouring pipe 12 is forcibly pushed out in the direction of arrow C. In this way, when the concrete 13 in the concrete pouring pipe 12 has been pushed out by the sponge balls 17, cleaning water 15 is then supplied to the pouring casing 2 side via the cleaning water supply pipe 11. Then, the supplied cleaning water 15 flows from the opened shirt valve 11a to the cleaning water supply port 2b and the communication hole 6a.
It flows into the concrete supply port 2c via the concrete supply port 2c, further flows to the concrete pouring pipe 12 side, and flows into the concrete pouring pipe 12.
The concrete remaining inside the pipe is pushed out in the direction of arrow C along with cleaning water 15 to clean the inside of the pipe. In addition, as shown in FIG. 1, the connecting part 1ie112a near the pouring song 2 of the concrete pouring pipe 12 and the cleaning water supply v:11 and the communication hole 6a drilled in the switching valve 6 are straight when communicating. Furthermore, since they are all formed with the same diameter D1, the extrusion and cleaning operation of the concrete by the sponge balls 17 can be performed smoothly without the sponge balls 17 getting stuck in the middle. Furthermore, cleaning with the cleaning water 15 is also performed using the cleaning water supply pipe 1.
1. Since there is no change in diameter between the communication hole 6a and the concrete pouring pipe 12, the cleaning water 15 is evenly distributed throughout the pipe in good condition.

In addition, although the above-mentioned example described the case where the valve body 6d formed in the simple cylindrical shape was used as the switching valve 6, an example in which a double cylindrical valve body was used as the valve body will be described below. do. Note that the same parts as those explained in FIG. 1 are given the same reference numerals, and the explanation of those parts will be omitted.

That is, as shown in FIGS. 6 and 7, the concrete placing device 19 has a first valve body 6e formed in a hollow cylindrical shape in the pouring casing 2. 6e is fitted and engaged so as to be slidable in the directions of arrows A and B along the axis of the cast casing 2. A second valve body 6f formed in a solid cylindrical shape is fitted and supported inside the first valve body 6e so as to be slidable in the directions of arrows A and B on the inner peripheral surface 6g of the first valve body 6e. A pair of communication holes 6 having a diameter of Dl are provided in the first valve body 6e.
A communication hole 6a having a diameter Dl is also formed through the second valve body 6f. Furthermore, the communication hole 6h of the first valve body 6e,
A conocrete supply hole 61 is bored in the lower left part of FIG. 6. Moreover, the first valve body 6e and the second valve body 6f include
A double piston cylinder 20 is connected, and the double piston cylinder 20 has a first piston 20b that is slidably engaged with the cylinder 20a in the directions of arrows A and B.

A hollow rod 20c is formed on the left side of the first piston 20b, and the right end of the first valve body 6e described above is connected to the tip of the hollow rod 20c. In addition, the first piston 20
Inside b, cylinder 20d connects the right end in the figure to cylinder 2.
The cylinders 20a and 20 are formed in open communication with the first piston 20a, and the left side of the first piston 20b in FIG.
A port 20g communicating with d is drilled through the port 20g. A second piston 20e is fitted into and engaged with the cylinder 20d so as to be slidable in the directions of arrows A and B, and a rod 20f is fitted into the second piston 20e so as to be slidable in the directions of arrows A and B inside the hollow rod 2Oc. The rod 20f is provided in a supported manner and further includes a rod 20f.
The right end of the second valve body 6f described above is connected to the tip of the valve body 6f.

Since the concrete placing device 12 has the above configuration, when placing concrete, pressure oil is supplied to the cylinder 20a through the port 20h of the double piston cylinder 20, as shown in FIG. , first piston 20
b is driven in the direction of arrow A to move the first valve body 6e in the direction of A via the hollow rod 20c. Then, the first valve body 6
Conocrete supply hole 61 of e is concrete supply port 2C
At the same time, the cleaning water supply port 2b is closed by the first valve body 6e. Moreover, when pressure oil is supplied from port 20h, the supplied pressure oil is also supplied from port 2Og into cylinder 20d in first piston 20b, and moves second piston 20e in the direction of arrow A. Then, the second valve body 6f also moves in the direction of arrow A within the first valve body 6e, and the seventh valve body 6f moves in the direction of arrow A.
As shown in the figure, the tip 6j of the second valve body 6f is positioned to the right of the concrete supply hole 61 in the figure,
1. The pouring pipe 12 and the discharge port 2a are the concrete supply port 2.
C and concrete supply hole 61. In this state, when the concrete 13 to be poured is supplied from the concrete pouring pipe 12 to the concrete supply port 2c, the supplied concrete 13 passes through the concrete supply port 2c and the first valve body 6e and is poured. The concrete flows into the concrete casing 2 and is further injected into the concrete placement space 5 in the formwork 3 from the discharge port 2a.

In this way, when a predetermined amount of concrete 13 is placed in the concrete placement space 5 and the work is completed, when cleaning the concrete placement pipe 12, pressure oil is supplied to the port 20k of the double piston cylinder 20. do. Then, as shown in FIG. 8, the second piston 20e in the first screw 20b starts moving in the direction of arrow B, and the second
The valve body 6f is placed in the B direction with respect to the first valve body 6e, that is, the discharge port 2.
The concrete 13 remaining in the first valve body 6e is pushed out in the direction of discharge p 2 a by the second valve body 6f. When the second piston 20e moves its full stroke in the B direction and comes into contact with the left side surface of the cylinder 20d, the tip 6j of the second valve body 6f coincides with the tip 6 of the first valve body 6e. Then, the first piston 20b starts moving together with the second piston 20e in the direction of arrow B inside the cylinder 20a, and the first valve body 6e and the second valve body 6
f moves in direction B within the pouring casing 2 with 16J aligned with its tip 6. As a result, all of the concrete 13 remaining in the pouring casing 2 is pushed out into the concrete pouring space 5, and the discharge port 2a is opened to the first valve body 6e.
and is closed by the second valve body 6f.

Further, when the first valve body 6e and the second valve body 6f of the switching valve 6 move in the B direction, the communication holes 6h and 6a formed in the first valve body 6e and the second valve body 6f align with each other, and
As shown in Fig. 8, the connecting hole 6h is in a state where they are aligned.
, 6a, concrete supply port 2C and cleaning water supply port 2b
The cleaning water supply pipe 11 and the concrete casting pipe 12 are aligned in a straight line, and the washing water supply pipe 11 and the concrete casting pipe 12 communicate with each other in a straight line via the respective connecting portions 11e and 12a. Therefore, as shown in FIG. 8, cleaning sponge balls 17 are fed under pressure in the direction of the casting casing 2 through the cleaning water supply pipe 11 using compressed air. Then, the sponge ball 17 reaches the cleaning water supply port 2b from the cleaning water supply pipe 11, and further passes through the communication holes 6h and 6a formed in the first valve body 6e and the second valve body 6f of the switching valve 6. The concrete enters the concrete pouring pipe 12, and the concrete 13 remaining in the concrete pouring pipe 12 is forcibly pushed out in the direction of arrow C. In this way, concrete is poured and installed by the sponge ball 17 f! :Concrete 1 in 12
3 has been pushed out, the cleaning water 15 is then supplied to the pouring casing 2 side via the cleaning water supply pipe 11. Then, the supplied washing water 15 similarly flows into the concrete supply port 2C via the washing water supply port 2b and communication holes 6h and 6a, and further flows into the concrete pouring pipe 12#.
i, the concrete remaining inside the concrete casting pipe 12 is pushed out in the direction of arrow C along with the cleaning water 15, and the inside of the pipe is cleaned.

Note that, as in this embodiment, the switching valve 6 is connected to the first valve body 6e.
and a second valve body 6f, and if these valve bodies are configured to be driven by the double piston cylinder 20, the first
Compared to the embodiment shown in the figures, there is no need to provide the shatter valve 11a and the drive cylinder 16 for driving it, so it is extremely effective in saving space in a narrow space such as a shield tunnel.

(g) 0 Effects of the Invention As explained above, according to the present invention, the cast casing 2 is provided with the discharge port 2a at the tip, and the switch valve 6 is installed in the cast casing 2. Along the axis of the cast casing 2, the connecting portion 12a,
The concrete casting pipe 12 and the cleaning water supply pipe 11, which are formed to have substantially the same diameter D1 in the vicinity of llc, are connected via the concrete supply port 2c and the cleaning water supply port 2b, and are further connected to the switching valve 6. Communication holes 6a and 6h are provided to linearly communicate the washing water supply port 2b and the concrete supply port 2C when the switching valve 6 closes the discharge port 2a,
Furthermore, since the connecting holes 6a and 6h are formed to have substantially the same diameter D1 as the connecting portions 11c and 12a, the concrete casting pipe 12 can be cleaned by disassembling the concrete casting pipe 12 as in the conventional method. This can be done by switching the switching valve 6 without having to do so, and the inside of the pipe can be cleaned efficiently even at a pouring site such as in a narrow tunnel.

[Brief explanation of the drawing]

FIG. 1 is a front cross-sectional view showing an embodiment of the concrete pouring device according to the present invention, FIGS. 2 to 5 are diagrams showing the operating state of the concrete pouring device shown in FIG. 1, and FIG. 7 and 8 are front sectional views showing another embodiment of the invention, and are diagrams showing the operating state of the concrete pouring device shown in FIG. 6. 1.1'... Concrete pouring device 2...
- Casting casing 2a... Discharge port 2b... Washing water supply port 2c... Concrete supply port 6... Switching valves 6a, 6h...・Communication hole 11...Cleaning water supply pipe 11c, 12a...Connection part 12...Concrete pouring pipe Applicant Mitsui Construction Co., Ltd. Agent Patent attorney Phase 1) Shinji ( 2 others) Figure 2 1] Figure 3 Figure 4] Figure 5

Claims (1)

[Scope of Claims] It has a cast casing with a discharge port provided at its tip, a switching valve is provided on the cast casing so as to be movable and driven along the axis of the cast casing, and a switching valve is provided in the vicinity of the connection part. A concrete casting pipe and a washing water supply pipe, which are formed to have substantially the same diameter, are connected via a concrete supply port and a washing water supply port, and the switching valve is further connected to the switching valve so that the switching valve closes the discharge port. In this case, a concrete pouring device is provided with a communication hole that linearly communicates the washing water supply port and the concrete supply port, and the communication hole is formed to have substantially the same diameter as the connection portion.