JP2591699B2 - Switchgear for concrete pressure pipe - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method for connecting a concrete pumping pipe in the middle of a concrete pumping pipe connected to a concrete pump truck to interrupt concrete pumping. The present invention relates to a concrete pressure pipe opening / closing device for resuming the operation.

[0002]

2. Description of the Related Art In a conventional opening and closing device for a concrete pumping pipe of this type, a plurality of pins are arranged in parallel with each other at a predetermined interval above the concrete pumping pipe, and the pins are inserted into and removed from the pumping pipe. As a result, concrete was cut off and opened (see Japanese Patent Application Laid-Open No. 58-177822). Further, as another means, the two fixed plates are repressed so that the two fixed plates are opposed to each other via a band-shaped protruding piece integrally provided along one surface vertical width direction of one of the two fixed plates, and A passage pipe communicating with a through hole formed at a relative position between the two fixing plates is fixed to each fixing plate, and a space formed by a facing surface of the two fixing plates and an inner surface of the band-shaped protruding piece has the same shape as the through hole. (See Japanese Utility Model Application Laid-Open No. 54-68431).

[0003]

Of the above conventional examples, when the concrete is cut off with a plurality of pins, it is sufficient if the concrete has a certain degree of viscosity.
In the case of so-called low-viscosity soft concrete, there is a problem that a sufficient blocking effect cannot be obtained.

In addition, a movable plate having a perforated hole having the same shape as that of a pipe is moved to the left and right. When the perforated hole and the pipe are aligned, concrete is pressure-fed, and conversely, the perforated hole moves, and the blind movable. When the board is at the position of the pipe, the concrete will be completely shut off, but when the drilled hole moves from inside the pipe to the outside of the pipe, the concrete in the pipe will be voided in the hole. When part of the concrete that has invaded solidifies, when the movable plate is switched from shut-off to open, a large amount of force is required to move the movable plate, and moving the movable plate is difficult. There was a drawback.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and it is an object of the present invention to completely shut off the inside of a concrete pumping pipe even if the concrete is soft, and to open and close the opening / closing plate. Alternatively, even when switching from opening to shutting, it can be achieved by effectively using a narrow place so that the opening and closing plate can be moved very easily despite the fact that there is no concrete intrusion and the sealing effect is extremely high .
And to provide a concrete pumping pipe switchgear and sea urchin.

[0006]

SUMMARY OF THE INVENTION A concrete pipe opening / closing device according to the present invention is provided so that it can enter a concrete pumping path to block the pumping path or separate from the concrete pumping path to open the pumping path. the reciprocable closing plate, attached to the closing plate guide port formed in the connection pipe which connects the concrete pumping tube, the bottom close to the closing plate guide opening, vertical
Made of oil-resistant synthetic rubber, resin or other elastic material placed on
Between the rectangular packing and the upper and lower packings
Frame material made of elastic materials such as oil-resistant synthetic rubber and resin
Forming an enclosed space by intervening, and the upper and lower packings
Each has a long hole that allows the opening and closing plate to penetrate under pressure.
With the viscosity of grease etc. in the closed space
Lubricating oil and hard chrome plating
It has been subjected to a surface treatment that makes it easy to slide, such as a key .

[0007]

The reciprocating opening / closing plate is mounted on an opening / closing plate guide opening formed in a connection pipe connected to the concrete pumping pipe. Closed space formed near the opening / closing plate guide port
Unlike making it in a separate place with hard material, the enclosed space
With upper and lower packing made of elastic material
And a length of the packing .
At the hole, the opening / closing plate is pressed and sealed, and
Sealed even with viscous lubricating oil filled in closed space
The concrete does not enter the closed space formed by the packing provided at a predetermined interval. Also, when moving the opening and closing plate, the sealed space formed by packing arranged at a predetermined interval is filled with viscous lubricating oil, so despite the fact that the opening and closing plate is strongly pressed by the packing, The viscous lubricating oil in the closed space directly acts on the adjacent packing portion, so that the opening / closing plate can be moved smoothly. In addition, by applying a surface treatment that facilitates sliding to the surface of the opening and closing plate, the opening and closing plate can be further smoothly moved in combination with the lubricating oil. Lubricating oil part in such a narrow place
Lubricating oil instead of separating the packing
The sealed space itself to be filled is packed with elastic packing etc.
By configuring, it is possible to effectively use narrow places
You.

[0008]

An embodiment of the present invention will be described below with reference to the drawings. Reference numeral 1 denotes a concrete pumping pipe, and reference numeral 2 denotes a connecting pipe connected to the concrete pumping pipe 1. Each of the inside of the concrete pumping pipe 1 and the inside of the connection pipe 2 serves as a concrete pumping path 3 for pumping concrete sent from a pump truck (not shown). The concrete pumping path 3 in the connecting pipe 2 is formed in a circular shape with the same shape as the concrete pumping pipe 1 before and after the concrete pumping path 3.
The elevation of the opening / closing plate 4 has a rectangular shape in cross section corresponding to the approximate width of the opening / closing plate 4 to enhance the sealing performance, and guide grooves (not shown) or guide projections of the opening / closing plate 4 in both side walls inside the rectangular shape in cross section. (Not shown) to withstand the pressure of concrete pumping. An opening / closing plate guide port 5 for mounting the opening / closing plate 4 so as to be able to move up and down is formed at an upper portion of the connection pipe 2. The shape of the opening / closing plate guide opening 5 is formed to have substantially the same cross-sectional shape in consideration of the thickness and width of the opening / closing plate 4 so that the opening / closing plate 4 can move up and down through the opening / closing plate guiding opening 5. In this example, the case where the opening / closing plate guide port 5 is formed at the upper part of the connection pipe 2 has been described. However, the present invention is not necessarily limited to this location.

The opening / closing plate 4 is required to have a width and a length capable of blocking the concrete pumping path 3 in the connecting pipe 2 and have a thickness and strength enough to withstand the pressure for pumping the concrete.
However, in the case of highly viscous concrete, the size of the opening / closing plate 4 does not need to be a size that completely blocks the concrete pumping path 3 and may have a slight gap. Usually, the opening / closing plate 4 is formed in a substantially rectangular shape, and both left and right edges of the opening / closing plate 4 are formed in an arc shape. The reason why the left and right side edges of the opening / closing plate 4 are formed in an arc shape in this manner is that if the opening / closing plate 4 is formed in a square shape, the packing effect of the corner portion is not sufficient, and concrete with high pressure intrudes from here. In order to eliminate. Further, the opening / closing plate 4 is subjected to a surface treatment by plating the surface thereof with hard chrome plating or the like so that the surface in contact with the packing 6 described later is easily slid.

As the packing 6, two rectangular plates 6a made of an elastic material such as an oil-resistant synthetic rubber such as neoprene or a resin are prepared, and the opening / closing plate 4 is inserted into each plate 6a in a resilient state. , And both ends of the long hole 6b are formed in an arc shape so that the left and right side edges of the opening and closing plate 4 can be sufficiently pressed. The rectangular plate 6a is formed between the rectangular plates 6a formed of an elastic material.
a and a frame member 7 made of an elastic material such as neoprene or a resin and having an elastic material such as neoprene, which has only the surrounding frame, and has two packings 6 and 7, To form a closed space 8. This closed space 8
Is filled with a lubricating oil 9 having viscosity such as grease. The lubricating oil 9 is filled through a filling hole 6c formed at an appropriate position on the periphery of the rectangular plate 6a located above.

The reciprocating opening / closing plate 4 is inserted into the long holes 6b of the upper and lower packings 6, 6 mounted on the periphery of the opening / closing plate guide port 5, and is resiliently pressed and sealed. The portions of the opening / closing plate 4 where the left and right side edges are formed in an arc shape are completely resiliently sealed by the portions where both ends of the long hole 6b are formed in an arc shape, and are formed by packings 6 arranged at predetermined intervals vertically. Concrete does not enter the closed space 8 at all. Further, when the opening and closing plate 4 is moved, the hermetically sealed space 8 formed by the packings 6, 6 disposed at predetermined intervals above and below is filled with viscous lubricating oil 9,
Despite the opening and closing plate 4 being strongly suppressed by the packing 6,
Since the viscous lubricating oil 9 in the closed space 8 acts on the packing 6 and the open / close plate 4 is exposed to the viscous lubricating oil 9 in the closed space 8, the movement of the open / close plate 4 is smooth. It can be carried out. Further, by applying a surface treatment such as hard chrome plating on the surface of the opening / closing plate 4 so as to be easily slidable, the opening / closing plate 4 can be more smoothly moved together with the lubricating oil 9.

The reciprocating opening / closing plate 4 is attached to the opening / closing plate guide port 5 formed in the connection pipe 2 connected to the concrete pressure feeding pipe 1 as described above. As means for reciprocating, in the case of manual operation, a rack 10 formed vertically on the left and right sides of the connecting pipe 2 connected to the concrete pumping pipe 1 with the connecting pipe 2 interposed therebetween, and a pinion 11 meshing with the rack 10 are provided. The handle 1 is detachably attached to an end of a shaft 12 having the pinion 11.
3 is attached. Thus, by rotating the handle 13 in one direction, the opening / closing plate can be smoothly raised or lowered. To automatically move the open / close plate 4, a hydraulic cylinder (not shown) or an air cylinder (not shown) can be operated, and the open / close plate 4 can be moved via the rack 10 and the pinion 11.

[0013]

As can be seen from the above description, the opening / closing device for a concrete pumping pipe according to the present invention enters into the concrete pumping path and shuts off the pumping path or separates from the concrete pumping path to close the pumping path. An openable and closable opening / closing plate is attached to the opening / closing plate guide opening formed in the connecting pipe connected to the concrete pumping pipe so that the opening / closing plate can be opened .
At the bottom, a bullet made of oil-resistant synthetic rubber, resin, etc.
Packing made of conductive material and upper and lower packings
The periphery between the parts is made of an elastic material such as oil-resistant synthetic rubber or resin.
A sealed space is formed with the formed frame material interposed, and
Each of the lower packings has an open / close plate
Grease or the like in the enclosed space.
Filled with lubricating oil having a viscosity of
With a slick surface treatment such as high quality chrome plating
Therefore, the following specific effects can be obtained.

That is, the reciprocally movable opening and closing plate is
Opening / closing plate guide port formed in the connecting pipe connected to the REET pumping pipe
At the position close to the opening / closing plate guide port.
This is different from creating a closed space with hard materials in separate places.
The upper and lower packings made of an elastic material are
Composed of a frame made of elastic material interposed at the edge
In the long hole of the packing , the opening / closing plate is pressed and sealed.
At the same time, the viscous lubrication filled in the enclosed space
Sealed with oil and arranged at predetermined intervals
Concrete penetrates the enclosed space formed by the packing
Never do.

When moving the opening and closing plate, a predetermined interval is set.
The enclosed space formed by the packing
Since the lubricating oil is filled, the opening and closing plate
Despite being pressed, viscous lubricating oil in the enclosed space is next to
Acts directly on the contacting packing part to smooth the movement of the open / close plate
Can be carried out In addition, sliding on the surface of the open / close plate
Easy-to-use surface treatment combined with lubrication oil
The layer and the open / close plate can be moved smoothly. So narrow
If the lubricating oil part and the packing part are provided separately
The sealed space itself filled with lubricating oil is
Effective use of narrow places by constructing with
can do.

[Brief description of the drawings]

FIG. 1 is a front view showing one embodiment of the present invention.

FIG. 2 is a side view of FIG.

FIG. 3 is a perspective view showing a relationship between an opening / closing plate and packing.

FIG. 4 is a sectional view of a closed space formed by packing.

[Explanation of symbols]

 DESCRIPTION OF REFERENCE NUMERALS 1 concrete pressure feed pipe 2 connection pipe 3 concrete pressure feed path 4 opening / closing plate 5 opening / closing plate guide port 6 packing 8 sealed space 9 viscous lubricating oil 10 rack 11 pinion

Claims (1)

(57) [Claims] A connection for connecting a reciprocating opening / closing plate to a concrete pumping pipe so as to enter the concrete pumping path to block the pumping path or to separate from the concrete pumping path to open the pumping path. Attached to the opening / closing plate guide opening formed in the pipe, and arranged vertically at a position close to the opening / closing plate guide opening .
Rectangular made of elastic material such as oil-resistant synthetic rubber and resin
Oil-resistant seals between the upper packing and the lower packing.
With a frame material made of an elastic material such as rubber or resin
Forming an enclosed space, and each of the upper and lower packings;
To form a long hole through which the opening and closing plate penetrates
In addition, lubricating oil having viscosity such as grease is
Filling and sliding the opening and closing plate with hard chrome plating etc.
An opening and closing device for a concrete pressure pipe characterized by a surface treatment that is easy to perform.