JPH0446020Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] This invention relates to a branch valve for a concrete transport pipeline in concrete pouring work.

In particular, this invention relates to branch valves for concrete transport pipelines at concrete casting sites for large concrete structures such as dams, bridge piers, and caisson-type concrete structures, where an extremely large amount of concrete is poured and the surface to be poured covers a wide area.

[Prior Art] For example, in an anchorage seen in the construction of a suspension bridge, an anchor frame for fixing the main cable and the main tower to the foundation is incorporated as a part of the foundation structure.

Moreover, this anchor frame portion is usually constructed with a framework structure in which the steel frame and fastening portions are complicated.

Therefore, when pouring concrete into this area, it is not possible to efficiently pour concrete using a commonly used concrete distributor.

Therefore, up until now, this has been done by pouring concrete piping.

In other words, concrete pouring work is performed while sequentially switching concrete piping.

[Problem that the invention attempts to solve]

By the way, when piping is replaced by concrete piping, the operation of the concrete pump must be temporarily stopped during the piping replacement. Therefore, not only is it not possible to fully utilize the capacity of the concrete pump, but it is also a factor in reducing the efficiency of concrete pouring work.

Particularly in the case of concrete structures such as the anchorages of suspension bridges mentioned above, where the placement positions are complicated, the amount of concrete poured is large, and the area covered is wide, the piping replacement work described above becomes extremely large. There was a problem in that the efficiency of the pouring work was significantly reduced.

Of course, such problems are not limited to the above-mentioned suspension bridges, but also structures that have complex steel frames or reinforcing bars, and require a large amount of concrete to be poured over a wide area, such as dams and other structures. This is particularly noticeable in the construction of caisson structures.

Therefore, as a means to solve such problems, for example, there has been a switching device for concrete transport pipes as disclosed in Japanese Utility Model Application No. 73434/1983, or a device for switching concrete transport pipes as disclosed in Japanese Utility Model Application Publication No. 1987-73434,
BACKGROUND ART A concrete pressure-feeding pipe switching device disclosed in Publication No. 97989 has been devised, and attempts have been made to efficiently switch concrete pipes.

By the way, the concrete transport pipe switching device disclosed in the above-mentioned Japanese Utility Model Application Publication No. 48-73434 is as follows:
As shown in Fig. 4, face plates 2a and 2b are attached to both sides of a rotatably supported cylindrical, specifically tapered, tubular rotating body 1, and one face plate 2a is connected to a concrete pump. In addition to attaching the inlet side pipe 3, a switching plate 5 on which a plurality of outlet side pipes 5a, 5b, . Communicating with the inlet side pipe 3 and the outlet side pipes 5a, 5
b Individual communication pipe 6 communicating with either...
By incorporating and rotating the rotating body 1, the inlet side pipe 3 and the outlet side pipes 5a, 5
It is configured such that the inlet side pipe 3 and the outlet side pipes 5a, 5b, .

Further, in the switching device for a concrete pressure conveying pipe disclosed in Japanese Utility Model Application Publication No. 54-97989 by the present applicant, a handle 11 is attached to a machine frame 10 as shown in FIG.
At the same time, a pinion 13 is fixed to the handle shaft 12, and a horizontally movable sliding plate 15 is installed in the machine frame 10.
5 is integrally attached with a rack 14 that meshes with the pinion 13, one or more moving tubes 16a, 16b... are held on the lower surface of the sliding plate 15, and the moving tubes 16a, 16b... The inlet side pipes 17a, 17b... and the outlet side pipes 18a, 18b... are connected to both ends of each pipe, and the moving pipes 16a, 16b... are moved horizontally as needed, for example, as the moving pipes. 16b to the outlet side pipe 18a, conversely, the transfer pipe 16a to the outlet side pipe 18
b..., and is configured to switch and connect the inlet side pipe and the outlet side pipe to each other.

However, the former switching device disclosed in Japanese Utility Model Application Publication No. 48-73434 is constructed so that the switching operation is performed by rotating a cylindrical rotary drum, which has a functional drawback in terms of operability. .

Moreover, it is structurally large, and there are problems when installing it in the middle of a transportation pipeline at a concrete pouring site, and when transporting and handling it after work is completed. In particular, in order to improve the rotational operability of the rotary drum, it is necessary to incorporate expensive ball bearings, etc., which poses problems in terms of the functionality and cost of the device.

Next, the latter switching device of the moving pipe type disclosed in Japanese Utility Model Application Publication No. 54-97989 requires connection work between the moving pipe and the outlet pipe at the time of switching, which poses a problem in the efficiency of the work. That is, although it is easy to switch the transfer tube itself, which is the target of switching, it is necessary to connect a so-called outlet side pipe to the outlet side of the transfer tube after it has been moved.

Therefore, the operation of the pump that feeds concrete had to be stopped during that time, and the time loss in concrete pouring could not be resolved.

In any case, the switching devices for transport pipes that have been devised so far have advantages and disadvantages, and there has been a demand for the development of an improved switching device for tightly sealing concrete transport pipes.

This idea was developed in response to these demands, and in particular, it has a branching function that allows concrete to be selectively fed from one series of feed-side pipes to one of multiple series of transport pipes. This was devised for the purpose of providing a valve equipped with the following functions.

[Means for solving problems]

Therefore, the present invention provides, as a means to achieve the above object, a fixed frame in which a plurality of outlet pipes are provided at intervals on a circumferential line of radius R, and a fixed frame provided with a plurality of outlet pipes at intervals on a circumferential line of radius R; a plate-shaped rotating frame provided with a single inlet side piping, the rotating frame is pivotally attached to the center of the radius R of the fixed frame so as to be freely rotatable, and both are in close contact with each other; Further, the rotating frame is configured to be rotated about the axis as a fulcrum by a driving device such as an operation cylinder, and to selectively connect the inlet side piping and one of the plurality of outlet side pipings. This is what I did.

[Effect]

Since the present invention is configured as described above, a concrete pump is connected to the inlet side piping, and concrete transport pipes or delivery hoses are connected to each of the plurality of outlet side pipings. Then, each concrete transport pipe or delivery hose is placed at a concrete placement position, and the concrete pump is driven to pump concrete.

At that time, the rotary frame having the inlet side piping connected to the concrete pump of the branch valve is appropriately rotated by a drive device consisting of an operation cylinder, etc., and the concrete transport pipe or concrete transport pipe connected to the plurality of outlet side piping Operate to connect the inlet side piping to any of the delivery hoses.
As a result, the concrete to be pumped is sent to the pouring surface from one system of concrete pumps through specified concrete transport pipes or delivery hoses of multiple systems.

In other words, when concrete placement locations are complicated by steel frames and reinforcing bars and are spread over a wide area, the multiple systems of concrete transport pipes or delivery hoses are placed in advance at key locations, and then the branch valves of the present invention are installed as appropriate. If the concrete is transported by switching operations, continuous concrete pouring work can be performed without stopping the operation of the concrete pump.

〔Example〕

Furthermore, this will be specifically explained based on an example.

First, FIG. 1 shows that a concrete introduction pipe 22 connected to a concrete pump is connected to the inlet pipe 21 of a branch valve A according to the present invention, and a concrete transport pipe 24 is connected to a plurality of outlet pipes 23, respectively. (hereinafter referred to as a delivery hose) is connected and shown in a piping diagram when in use.

In addition, in this FIG. 1, the introduction pipe 22 and delivery hose 24 connecting the concrete pump and the branch valve A may be made of so-called steel pipes.
It may also be a flexible hose. 25
is a pipe joint at the connection part of the introduction pipe 22.

Next, the configuration of the branch valve of the present invention will be specifically explained based on FIGS. 2 and 3.

FIG. 2 is a plan view of the branch valve, and FIG. 3 is a front view seen from the front side.

First, the fixed frame 26 is a plate-shaped one that is attached to the base frame 3.
As shown in FIGS. 2 and 3, two outlet pipes 23a and 23b are provided at intervals on the circumferential line of radius R on its side surface.

In addition, in this embodiment, the outlet side piping 23a, 23b
Although the number is set to two as described above, three or more may be set as necessary. Also, the outlet side piping 23
The outlet side pipes 23a, 23a are respectively attached to the surface of the plate-shaped fixed frame 26 so as to face in the radial direction as shown in FIG.
Delivery hoses 24a and 24b are respectively attached to 3b.
To facilitate the connection work when connecting the
Delivery hoses 24a, 24b during use
This is to prevent entanglement, etc.

Next, the rotating frame 27 is connected to the fixed frame 2.
Like 6, it is plate-shaped, and its outer shape is approximately fan-shaped as shown in FIG. The inlet side pipe 21 is provided at a concentric circle position with a radius R of the fixed frame 26 at approximately the center thereof.

This rotating frame 27 is connected to the fixed frame 26.
The frames 26 and 27 are rotatably mounted with a pivot 28 at the center of the radius R of the second frame.
They are placed in close contact as shown in the figure.

Next, this rotating frame 27 is
In this embodiment, a connecting piece 2 is provided on the lower surface of the inlet side pipe 21 as a means for rotating the inlet side pipe 21 as a fulcrum.
9 is provided, and a piston rod 32a of a hydraulic operating cylinder 32 whose base end 31 is pivotally connected to a base frame 30 that holds the fixed frame 26 is connected, and this operating cylinder 32 is actuated to control the rotating frame 27. It is configured so that it can be rotated.

Note that 33a and 33b shown in FIG. 3 are stoppers for regulating the turning angle of the rotating frame 27, and when the operating cylinder 32 is operated to rotate the rotating frame 27, the rotating frame 27
This is to restrict the turning position of the rotating frame 27 when the inlet side pipe 21 on the side is communicated with either the outlet side pipes 23a, 23b on the fixed frame 26 side.

Further, in this embodiment, the rotating operation of the rotating frame 27 is performed using the driving device consisting of the operating cylinder 32 as described above. A part of the rotating frame 27 may be connected to the drive chain, and the rotating frame 27 may be rotated by rotating the drive chain in forward and reverse directions. It may also be configured so that the turning operation can be performed automatically using the .

As explained above, the branch valve according to the present invention can be used for concrete inlet piping consisting of one system of introduction pipe connected to a concrete pump.
Concrete can be selectively sent to any of the so-called multiple systems of concrete transport pipes, that is, delivery hoses connected to multiple outlet pipes, by operating the branch valve, so the following effects can be achieved. I was able to bring it.

[Effect of idea]

(1) Even if the area where concrete is to be poured is a complex structure with a complex structure of steel frames and reinforcing bars, if the delivery hose connected to the outlet side piping of the branch valve is placed in advance at key points, the branch valve can be easily operated. Continuous concrete pouring work can be performed simply by sequential switching operations. In other words, there is no loss in time required for switching concrete piping, and efficient concrete pouring is possible.

(2) Related to the above, since there is no need to interrupt the operation of the concrete pump, it is possible to fully utilize the capacity of the concrete pump.

(3) Moreover, since there are multiple outlet side pipings for each inlet side piping, it is possible to secure delivery from multiple systems for one concrete pump, which means that a large amount of concrete can be placed and it can be used over a wide area. In this case, concrete can be placed efficiently with fewer concrete pumps.

(4) Furthermore, related to the above, it becomes possible to reduce the number of working personnel, and this, combined with the work efficiency, makes it possible to save labor and reduce costs in concrete pouring work.

(5) The configuration of the branch valve itself is much simpler than that of conventional switching devices, has excellent portability and installation, and is extremely suitable for the special environment of a construction site.

The branch valve of the present invention can be used in systems other than concrete transport pipelines, such as piping systems for processing muddy water containing solids generated at construction sites, or piping systems for processing surplus sludge in sewage treatment facilities, etc. It can also be applied to transportation piping systems.

[Brief explanation of drawings]

The drawings show an embodiment of the branch valve according to the present invention. Figure 1 is a schematic diagram showing the usage state in which the branch valve of the present invention is incorporated into a concrete transport pipeline system, and Figures 2 and 3 are examples of the branch valve according to the present invention. FIG. 2 is a plan view and a front view of a branch valve of FIG. FIGS. 4 and 5 are perspective views showing the mechanism of a conventional switching device for concrete transport pipes. A... Branch valve, 21... Inlet side piping, 22
...Introduction pipe, 23...Outlet side piping, 24...Delivery hose (concrete transport pipe), 25...
Pipe joint, 26... Fixed frame, 27... Rotating frame, 28... Pivot, 29... Connection piece, 30...
... Base frame, 31 ... Pivot joint, 32 ... Operation cylinder, 33 ... Stopper.

Claims (1)

[Scope of utility model registration request] A plate-shaped fixed frame in which a plurality of outlet side pipes are provided at intervals on a circumferential line with a radius R, and a plate-shaped fixed frame in which a single inlet side pipe is provided in a position on a concentric circle with the radius R. A rotating frame is provided, and the rotating frame has a radius R of the fixed frame.
The rotary frame is rotatably connected to the center of the inlet side piping with both sides in close contact with each other, and the rotary frame is configured to be able to rotate around the axis as a fulcrum by a driving device such as an operating cylinder, and is connected to the inlet side piping. A branch valve for a concrete transport pipeline, characterized in that it is capable of selectively communicating with one of a plurality of outlet side pipes.