JPH06213388A - Pulsation absorbing device for concrete pressure feed pipe - Google Patents

Abstract

PURPOSE:To damp the shock generated at the time of sending concrete by pressure by supporting a connection pipe constituting part of a concrete pressure feed pipe in such a way as slidable in the axial direction, and allowing a shock absorber to absorb the shock at this time of sliding. CONSTITUTION:When concrete supplied from a concrete pump to a concrete pressure feed pipe is to be placed at a site of construction, a pulsation absorbing device is installed on the way of the concrete feed pipe. This pulsation absorbing device has a connection pipe 3 constituting a part of the concrete feed pipe, wherein the connection pipe 3 is supported in openings 21a, 21b of supporting frames 2a, 2b. A pair of flanges 31a, 31b are secured to the connection pipe 3, and shock absorbers 4a, 4b are installed between the frames 2a, 2b and flanges 31a, 31b, respectively, in such a way as in cooperation with springs 53a, 53b. The shock due to axial direction sliding of the concrete feed pipe generated by pulsation of the pump is absorbed by the shock absorbers 4a, 4b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pulsation absorbing device for a concrete pressure feeding pipe.

[0002]

2. Description of the Related Art A general concrete pressure feed pipe is horizontally piped from a concrete pump through a boom pipe or a rising pipe of a pump car at a place where it is laid. At this time, since the pumping pipe is shaken by the pulsation of the pump, the scaffold that fixes the pipe may sway, or the reinforcement of the floor may be disturbed. Therefore, as a method for preventing the disorder of the bar arrangement, the following method has been conventionally used.

<B> As shown in FIG. 6, a method for absorbing the impact of the pulsation of the pressure feeding pipe a by receiving the pressure feeding pipe a with a rubber tire c placed on the bar arrangement b.

<B> As shown in FIG. 7, a method of receiving the pressure-feeding pipe a by a receiving plate f attached to a support base d via a spring e to reduce the pulsating impact of the pressure-feeding pipe a.

[0005]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
There are the following problems. That is, in the method using a rubber tire, since the reinforcing bar moves due to the lateral displacement of the tire, it is difficult to reliably prevent the reinforcing bar from being disturbed. Further, in the method using the support base, since the legs of the support base are placed on the slab, the form may be deformed or damaged.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is possible to reliably prevent disorder of bar arrangement and prevent deformation and damage of molds. -To provide a pulsation absorbing device for a pressure feeding pipe.

[0007]

That is, the present invention relates to a device for connecting to a concrete pressure feed pipe to absorb pulsation of the pressure feed pipe at the time of concrete pressure feed, by connecting the pressure feed pipe. A connecting pipe forming a part, a frame for slidably supporting the connecting pipe in the axial direction, one end fixed to the frame and the other end fixed to the connecting pipe side, and arranged in the axial direction, A concrete pressure feed pipe comprising a shock absorber for absorbing an impact force generated when the connecting pipe slides, and a spring for restoring the sliding connecting pipe to its original position. Is a pulsation absorber.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. <A> Frame The frame of the apparatus is composed of a basic frame 1 and a supporting frame 2 made of a plate material having rigidity such as a steel plate. The basic frame 1 is provided with a mounting hole 11 for inserting a bolt to fix the device to a pillar or the like. Also, this basic frame 1
In this case, the pair of support frames 2a and 2b are raised in the orthogonal direction with a space therebetween. Then, each support frame 2a, 2
In b, openings 21a, 21 for penetrating the connecting pipe 3 are provided.
Open b.

<B> Connection pipe The connection pipe 3 is a short pipe having the same diameter as the concrete pressure feed pipe,
Both ends are penetrated through the openings 21a and 21b of the support frame 2 so as to be slidable in the axial direction. In addition, connection pipe 3
A pair of flanges 31a and 31b are provided between the support frames 2a and 2b on the outer peripheral surface so as to be spaced from each other. Then, the through hole 32a is formed in the lower portion of the flange 31a, and the flange 31b is formed.
A through hole 32b is formed in the upper part of each.

<C> Shock Absorber The shock absorber 4 uses a known device such as an oil-filled type. Then, the support frame 2a and the flange 3
The shock absorber 4a and the supporting frame 2b are provided between 1a.
The shock absorbers 4b are installed between and the flange 31b in parallel with the axis of the connecting pipe 3.

<D> The spring rods 5a and 5b are penetrated through the through holes 32a and 32b of the flanges 31a and 31b, positioned parallel to the axis of the connecting pipe 3, and both ends are fixed to the support frames 2a and 2b. To do.
Spring retainers 51a and 51b are attached to the inner surfaces of the through holes 32a and 32b of the rods 5a and 5b, and spring retainers 52a and 52a are provided near the support frames 2a and 2b.
Attach 52b. Then, the spring 53a is set between the spring retainers 51a and 52a, and the spring 53b is set between the spring retainers 51b and 52b. Although not shown, the upper and lower spring mechanisms configured as described above are similarly provided at symmetrical positions on the back side thereof, and are provided at four positions in all directions. The spring holders 52a and 52b are configured so that the spring stroke can be adjusted by changing the axial position by rotating the adjusting screws 55a and 55b screwed into the screw grooves 54a and 54b. Further, the numbers of shock absorbers and spring mechanisms are not limited to the above, and may be appropriately selected according to the required performance of the device.

[0012]

Method of use As shown in FIG. 1, a pulsation absorbing device A of the present invention is provided between a concrete pressure feed pipe 7 arranged horizontally and a flexible hose 72 of a boom 71 of a pump car. ,
Alternatively, the flexible hose of the pressure feeding pipe 7 and the rising pipe 73
It is installed between the space 74 and As for the mounting method, a joint such as a victor joint is used, and the pressure feed pipe 7 and the flexible hose 72 or 7 are respectively attached to the end portions of the connection pipe 3.
Connect 4 As for the method of fixing the pulsation absorbing device A, in the RC structure, as shown in FIG.
The rubber tires 76 installed on the 5 support the mooring lines 7
7, it is moored and restrained to the beam rebar 78 and the like. Mooring line 77
The degree of tension is adjusted with a lever block 79 or the like. In the structure of S structure or SRC structure, as shown in FIG. 4, the pillar 8 is sandwiched between the device A and the basic frame 1 and the plate 81, and the space between them is fastened with the bolts 82, so that the device A
Is fixed to the pillar 8. As described above, the concrete is pressure-fed while the pulsation absorbing device A is firmly fixed.

[0013]

The pulsation generated when the concrete is pressure-fed causes the pressure-feed pipe 7 to slide in the axial direction, and a large impact force is generated. Therefore, the connecting pipe 3 integrally connected to the pressure feeding pipe 7 also slides, but the impact force in the axial direction is absorbed by the shock absorber. At this time, since the sliding connection pipe 3 is returned to its original position by the spring mechanism, the axial reciprocating impact force is alternately absorbed by the two shock absorbers. Therefore, the impact force generated when the pressure feed pipe 7 slides can be attenuated. By adjusting the spring stroke, the timing at which the spring begins to work can be adjusted, so that the amount of energy absorbed by the shock absorber can be adjusted. The amount of energy absorbed can also be adjusted by operating the adjustment dial of the shock absorber.
Therefore, the performance of the device can be adapted to the site conditions, and efficient operation can be performed.

[0014]

Other Embodiments In the above embodiments, the case where the pulsation absorbing device is attached to the pressure feed pipe consisting of only the straight pipe has been described, but it goes without saying that it can be applied to the pressure feed pipe having a bent portion as shown in FIG. Is. In this case, the flexible hose 91 is connected to both ends of the bent pipe 9, then the pulsation absorbing device A is connected, and the straight pipe 92 is further connected. This makes it possible to obtain the same impact absorbing effect as in the above-described embodiment.

[0015]

According to the present invention, by mounting a device having a shock absorber and a spring mechanism on a pressure feeding pipe, it is possible to damp the impact force generated during the pressure feeding of the concrete. Therefore, it is possible to surely prevent the disorder of the reinforcement of the structure during the concrete pressure-feeding work, and to prevent the deformation and damage of the formwork.

[Brief description of drawings]

[Fig. 1] Explanatory drawing showing the construction method

FIG. 2 is an explanatory view of an embodiment of the device of the present invention.

[Figure 3] Illustration of how to use

FIG. 4 is an explanatory diagram of how to use

FIG. 5 is an explanatory diagram of another embodiment.

FIG. 6 is an explanatory diagram of a conventional technique.

FIG. 7 is an explanatory diagram of a conventional technique.

Claims (1)

[Claims] 1. A device for connecting to a concrete pressure-feeding pipe to absorb pulsation of the pressure-feeding pipe at the time of concrete pressure-feeding, and a connecting pipe which is connected to the pressure-feeding pipe and constitutes a part of the pressure-feeding pipe. A frame that supports the pipe slidably in the axial direction and an impact force generated when the connecting pipe slides by arranging it in the axial direction with one end fixed to the frame and the other end fixed to the connecting pipe side. A pulsation absorbing device for a concrete pressure feeding pipe, which comprises a shock absorber for absorbing the pressure and a spring for restoring the sliding connection pipe to the original position.