JP2000035145A - Constant flow valve device used for fluid material force feed conduit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To favourably balance a flow rate separated from a Y pipe. SOLUTION: An opening adjusting sleeve 2 made of a flexible elastic material as rubber, etc., is loaded in the inside of a branched pipe body 1 free to elastically deform, a pressure rod 3 is arranged on the outside of an intermediate part of the opening adjusting sleeve 2 in its diametrical direction, at the time of adjusting a flow rate of a fluid material in accordance with its advance and retreat, a hydraulic pressure pressure chamber filled with oil is formed in a cavity between a hydraulic pressure working sleeve made of a flexible elastic material of rubber, etc., loaded in the inside of a large diametrical pipe body on the lower converting side and an inner peripheral surface of the large diametrical pipe body is formed, a plural number of elastic force support bodies elastically pressurized by springs on a plural number of points in the longitudinal direction are arranged on an outer periphery of the hydraulic pressure working sleeve free to advance and retreat in the diametrical direction of the hydraulic pressure working sleeve, and at the time when pressure of the fluid material force fed in the inside of the hydraulic pressure working sleeve pressurizes oil in the hydraulic pressure chamber by competing with the elastic force support bodies, contact quantity is adjusted by advancing and retreating the pressure rod 3 by its pressure oil.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spraying device of a pumping type which mainly sprays SF mortar (steel fiber mortar) pumped by a hydraulic type pump in a ReSP method (slope repair / reinforcement) on a slope. And the like.

[0002]

2. Description of the Related Art Conventionally, air spraying has been the mainstream in slope spraying of SF mortar material, but the advantages of the pumping method have been recently recognized.

[0003] The main equipment required for mortar spraying by the pumping method includes spray nozzles, material hoses, pipes, hydraulic pumps as material supply equipment, ready-mixed concrete mixer trucks, generators, your compressors, and rapid hardening. Agent (material B for mixing in the nozzle)
There are a belt conveyor and a water tank for supplying steel fiber to a truck mixer truck.

[0004] The number of these equipments is generally one for each equipment as a material supply equipment for one nozzle.

[0005] In this case, since there is a margin in the capacity of the pressure feed pump, the discharge amount is adjusted to less than half and used.

[0006]

The performance of each equipment of the equipment for supplying mortar spraying material by the pumping pumping method has the ability to correspond to two nozzles.

[0007] Accordingly, if the construction with two nozzles is possible, the construction efficiency is doubled while the equipment related to the construction is kept as it is, so that the construction period and construction costs are greatly reduced (almost half).
It is thought that it is possible.

However, various types of test technicians using a two-nozzle method in which a hose line from one pressure pump is branched by a Y-shaped pipe have been tried. However, the discharge amount balance of both nozzles becomes unstable. All failed.

The degree of the ejection amount instability was sensitive to a slight difference in height between the nozzles, and the ejection amount ratio of the material changed from 0% to 100% from 100% to 0%.

[0010] In order to put the two-nozzle construction method into practical use, it is necessary to provide a device for causing the material to flow stably in a well-balanced manner in both the two nozzles. From the point of view (the equipment is rough and the work site is difficult to supply power due to bad conditions such as slopes), the precise electronic control equipment utilizing the advanced technology is used for material transfer, material hose and pipeline. Installation on top is not preferred.

For the same reason, it is desirable to avoid providing a power air supply line (wire air hose) as a driving power source for the apparatus.

At present, the two-nozzle construction method has not been put to practical use because the above problems have not been solved yet.

[0013]

A fluid material such as SF mortar is fed from a material pump such as a concrete pump from a pipe 1 of a flow control valve mechanism A to a large diameter pipe 12 of a control valve control mechanism B. In response, the hydraulic working sleeve 13 is expanded so as to push a required amount of the elastic support 15 that elastically supports the hydraulic operating sleeve 13 according to the flow pressure, whereby oil in the hydraulic chamber 14 is released. It is pressurized and sent to the cylinder chamber on the rear side of the piston cylinder 6 of the regulating valve control mechanism B via the oil supply hose 10.

The piston 7 of the piston cylinder 6 is pushed forward by this hydraulic pressure and moves forward by a predetermined amount. With this, the piston 7 protrudes toward the opening adjusting sleeve 2 by a pressing rod projecting therefrom and moves the opening adjusting sleeve 2 toward the center by a predetermined amount. To reduce the inner cross section of the inner space of the opening adjustment sleeve 2 by a predetermined amount, thereby adjusting the flow rate of the fluid material fed into the inside.

When the flow rate of the fluid material to be flown into the hydraulic operating sleeve 13 is adjusted by the deformation of the opening adjusting sleeve 2 in this manner, the pressure acting on the hydraulic operating sleeve 2 changes according to the adjusted flow rate. The oil pressure in the hydraulic chamber 14 changes.

In response to the change of the pressure, the amount of advance of the pressing rod 3 by the piston 7 of the regulating valve control mechanism B changes.
The opening of the inner cross section changes due to the deformation of the opening adjusting sleeve 2.

The flow rate adjusting action by the flow rate adjusting valve mechanism A and the adjusting valve control mechanism B as described above is continuously and alternately repeated. Even if it changes, the fluid material fed from the regulating valve control mechanism B to the spray nozzle or the like is automatically mechanically adjusted to a constant pressure and a constant flow rate.

Therefore, even in the simultaneous construction using a plurality of nozzles by the pumping method, the balance adjustment of the material flow rate in the line toward each nozzle and the automatic control of the stable supply can be made without difficulty, and the construction efficiency can be doubled. In addition, the construction cost can be greatly reduced, and the adjustment control mechanism is composed of mechanical members with little failure or wear, so that it can be used stably without any trouble even in spraying work involving a little rough work, and Since no electric power is required for the adjustment control mechanism, construction is possible even under adverse conditions such as mountainous areas where power supply is difficult.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a schematic diagram showing a direct connection to two branch pipes of a Y-shaped pipe for branching a fluid material transfer line such as SF mortar in two directions, either directly or indirectly through a required connecting pipe. 1 shows a flow material constant flow valve device according to the present invention, which is connected to a pump, and a flow control valve mechanism A is provided on a pump side (right side in the figure) and a control valve control mechanism B is provided on a nozzle side (left side in the figure). Are located in

As shown in FIG. 2, the flow control valve mechanism A
An opening adjusting sleeve 2 made of a flexible elastic material such as rubber is inserted into a tube 1 for introducing a fluid material such as mortar fed from a branch pipe of a U-shaped pipe. An inner section (opening) of the inner space of the opening adjusting sleeve 2 at this portion is pressed in the opposing direction by pressing rods 3, 3, which are disposed on the outer side of the intermediate portion so as to be able to move forward and backward in the radial direction.
Is appropriately adjusted to adjust the flow rate of the fluid material fed into the inside thereof.

The opening adjusting sleeve 2 is fixed to the tube 1 with a screw 4 or the like at a portion of the pump closer to the pump than the opposing portions of the pressing rods 3, 3, and the other portions are separated from the tube 1 to be elastically deformable. It has become.

The pressing rod 3 is integrally attached to a piston 7 in a piston cylinder 6 attached to a fixed pedestal 5 attached to the outer periphery of an intermediate portion of the tube 1, and when the piston 7 moves forward, the fixed pedestal is fixed. 5 and project from the through hole 8 formed in the pipe 1 toward the opening degree adjusting sleeve 2.

A pressure oil supply port 9 is provided in a cylinder chamber on the rear side of the piston cylinder 6, and an oil supply hose 10
Are connected at one end.

At the rear side of the piston 7, there is provided a pressing assist spring 11 for assisting the advance of the piston 7 by hydraulic pressure.

As shown in FIG. 3, the adjusting valve control mechanism B is such that a short connecting pipe 12 ', which is a connecting portion with the pipe 1, has the same diameter as the pipe 1, and a main body part ahead of the connecting pipe 12' has a connecting pipe. A hydraulic operating sleeve 13 made of a flexible elastic material such as rubber having one end attached to the inner surface of the connecting tube 12 ′ is loaded into the large-diameter tube 12 having a diameter larger than the body 12 ′. An oil-filled hydraulic chamber 14 is formed in a gap between the outer periphery of the sleeve 13 and the inner peripheral surface of the large-diameter tube 12, and a plurality of circumferentially and longitudinally extending portions are formed on the outer periphery of the hydraulic operating sleeve 13. The hydraulic operating sleeve 13 is disposed so as to be able to advance and retreat in the radial direction, and the hydraulic operating sleeve 13 is pressed toward the center thereof by these elastic support members 15 to elastically support the hydraulic operating sleeve 13 in a state where its inner cross section is slightly reduced. The pressure of the fluid material pumped into the hydraulic sleeve 13 When pressurizing the oil in the hydraulic chamber 14 is larger than the suppression supporting force of the resilient support 15,
The pressure oil is pressure-fed to the piston cylinder 6 via the oil feed hose 10 having the other end connected to the hydraulic chamber 14.

The elastic support 15 is a rod having a semicircular head at the distal end in contact with the hydraulic operating sleeve 13, and is subjected to elastic force by a pressing spring 16 in the direction of the distal end.

The pressing spring 16 is provided between the tip of an adjusting screw 18 screwed into a spring case 17 provided on the outer periphery of the large-diameter tube 12 and a projecting portion of the elastic support 15. The support pressure on the hydraulic operation sleeve 13 by the bullet support 15 is adjusted.

The pipe 1 and the connecting pipe 12 'are connected by a coupling 19, and the opening adjusting sleeve 2 and the hydraulic operating sleeve 13 therein are continuously connected in series.

The constant flow valve device constructed as described above is covered with a cover 20 as shown in FIG.
A branch pipe such as a U-shaped pipe 21 is connected to a material hose 22 with a nozzle at the front end.

FIG. 5 shows an outline of spraying work by a pumping method using a constant flow valve according to the present invention. A steel pipe having an inner diameter of 3.5 inches (about 88.9 mm) is fed from a material discharge port of an SF mortar pumping pump 23. The piping is extended to the vicinity of the center of the spraying method, a flexible material hose 24 is connected and extended to reach the entire slope, and the constant flow valve device of the present invention is connected to each branch pipe 21 via a Y-shaped pipe. The required length (3 m to 10 m
m) of the material hose 22 is connected.

The weight of each material hose 22, the Y-shaped pipe 21, the constant flow valve device of the present invention, etc., including the weight of the material being pumped, does not impose a burden on the spraying operation. The spraying operation is performed from the upper side to the lower side of the slope while being suspended by the holding rope 26.

In this case, by using a special hardening agent, the slump value becomes zero at the moment when the spray material (SF mortar) is sprayed from the nozzle.

This quick-hardening agent is composed of two types of admixtures (tentative name: A
Agent, agent B), agent A is mixed in advance in the mortar,
The B agent is used by being mixed with a material (SF mortar) immediately before injection in a spray nozzle on site.

Because of the method of using such a hardener,
The state of the material in the pipe has relatively good fluidity, and the material flows in the spraying device as a viscous fluid instead of a plastic body.

In the above description, the construction using two nozzles has been mainly described. However, when a model having a larger capacity of the pressure pump is selected, a three or more nozzle system is also possible.

The apparatus of the present invention can be used not only for spraying SF mortar, but also for spraying fluid material such as mud spraying, ready-mixed concrete spraying, and premixing improved soil casting, or pressure fluctuation. As a device for quantitatively discharging fluid, it can be used for general plant equipment and the like.

[0037]

As described above, according to the present invention, the flow control operation by the flow control valve mechanism A and the control valve control mechanism B is continuously and alternately repeated. Even if the flow rate and the pumping pressure change greatly, the flow material fed from the regulating valve control mechanism B to the spray nozzle will be automatically adjusted to a constant pressure and a constant flow rate mechanically. As a result, In the spraying of SF mortar, etc., the material is stably supplied to both of the multiple material hoses branched by a Y-shaped pipe, and the spraying by the multiple nozzle method is enabled, and the construction period and construction cost can be greatly reduced. .

Further, since the flow rate adjusting mechanism is constituted by mechanical members such as a flexible elastic sleeve and a hydraulic mechanism, it can be used stably without any trouble even in spraying work involving a little rough work. Since no electric power is required for the control mechanism, construction is possible even under adverse conditions such as mountainous areas where power supply is difficult.

[Brief description of the drawings]

FIG. 1 is a side view of a constant flow valve device according to the present invention.

FIG. 2 is a vertical sectional side view showing a flow regulating valve mechanism according to the present invention.

FIG. 3 is a vertical sectional side view showing a regulating valve control mechanism according to the present invention.

FIG. 4 is a partial plan view showing a connection arrangement state of the constant flow valve device of the present invention.

FIG. 5 is a schematic diagram showing a state of slope spraying using a constant flow valve device of the present invention by pumping.

[Explanation of symbols]

 Reference Signs List A Flow control valve mechanism B Control valve control mechanism 1 Tube 2 Opening adjustment sleeve 3 Press rod 4 Screw 5 Fixed pedestal 6 Piston cylinder 7 Piston 8 Through hole 9 Supply rod 10 Oil feed hose 11 Press auxiliary spring 12 Large diameter pipe 12 'Connection pipe 13 Hydraulic operation sleeve 14 Hydraulic chamber 15 Ammunition support 16 Press spring 17 Spring case 18 Adjustment screw 19 Coupling 20 Cover 21 Y-shaped pipe 22 Material hose 23 Pressure pump 24 Material hose 25 Spray nozzle 26 Suspension rope

Claims (1)

[Claims] An opening adjusting sleeve made of a flexible elastic material such as rubber is loaded inside a tube so as to be elastically deformable, and is integrally attached to a piston in a piston cylinder attached to an outer periphery of an intermediate portion of the tube. The pressing rod is disposed outside the intermediate portion of the opening adjusting sleeve so as to be able to advance and retreat in the radial direction, and when the piston advances, the pressing rod adjusts the opening through a through hole opened in the tubular body. By projecting toward the sleeve and pressing the opening adjustment sleeve, by adjusting the inner cross section of the inner space of the opening adjustment sleeve in this portion,
A flow regulating valve mechanism configured to regulate the flow rate of the fluid material pumped into the inside thereof; and a large-diameter tubular body connected to the tubular body having a diameter larger than that of the tubular body. A hydraulic working sleeve made of a flexible elastic material such as rubber attached to a connection portion with the hydraulic working sleeve is loaded, and a hydraulic chamber filled with oil is filled in a gap between an outer periphery of the hydraulic working sleeve and an inner circumferential surface of the large-diameter pipe body. While forming, on the outer periphery of this hydraulic operation sleeve,
A plurality of elastic supports are arranged at a plurality of positions in the circumferential direction and the longitudinal direction so as to be able to advance and retreat in the radial direction of the hydraulic operating sleeve. The hydraulic material is elastically supported with its inner cross section reduced, and the pressure of the fluid material fed into the hydraulic operation sleeve becomes greater than the elastic pressure support of the elastic support to pressurize the oil in the hydraulic chamber. An adjusting valve control mechanism configured to send the pressurized oil to a cylinder chamber on the rear side of the piston cylinder via an oil supply hose. Flow valve device.