JP2016191223A - Apparatus for evaluating specification of injection from rod injection port - Google Patents

Abstract

PROBLEM TO BE SOLVED: To properly evaluate injection specifications of injection matter jetted from an injection port provided in a rod.SOLUTION: An apparatus includes: a fixing device 30 for fixing a rod 20 having an injection port 21 for injection matter; a target device 40 for receiving the injection matter jetted from the injection port 21; a measuring device 50 for measuring an arrival state of the injection matter jetted to the target device 40; an injection distance adjusting device 80 for adjusting a relative interval between the injection port 21 and the target device 40; and an injection device 60 for jetting the injection matter from the injection port 21.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an injection specification evaluation apparatus for confirming the direction, pressure, diffusion range and the like of an injection material injected from an injection port provided in a rod used in, for example, a high-pressure injection stirring method.

  In ground improvement work using the high-pressure jet agitation method, drilling and ground improvement are performed by injecting water, hardener, improvement material, air or other injections from the injection port provided at the tip of the rod. Yes. At this time, the ground can be improved within a desired range by rotating or swinging the rod. Conventionally, various techniques for forming a ground improvement body having a desired shape by a high-pressure jet stirring method have been disclosed (see, for example, Patent Document 1).

  The technique described in Patent Document 1 performs a step of agitating while cutting the ground by injecting a high-pressure fluid jet containing air from an injection port of a rod penetrating into the ground, and a step of raising the rod. The present invention relates to a high-pressure jet stirring method for forming a ground improvement body.

JP 2012-62616 A

  By the way, the injection specifications such as the injection direction, injection pressure, and injection range of the injection material injected from the injection port affect the finished shape and quality of the ground improvement body to be formed. Therefore, in order to form a ground improvement body as designed, it is necessary to confirm the injection specifications in advance.

  However, since the injection specification confirmation device currently used evaluates the injection specification using an experimental rod, it is possible to obtain an experimental value and perform an average evaluation. It is not possible to make individual evaluations on the injection specifications of the rods used in In addition, when evaluating the injection specifications, it is necessary to perform a detailed evaluation in accordance with the actual situation at the site. That is, the injection port of the rod that is actually used on site is manufactured based on the design, but there may be variations in the injection direction, the injection pressure, the injection range, and the like. Further, when the rod is continuously used, the original accuracy is not always maintained.

  In particular, when it is necessary to perform ground improvement work without removing existing buildings in a residential area where houses are densely populated, a ground improvement body is formed in the direction as designed by accurately grasping the injection specifications. There must be. In other words, in ground improvement work in confined areas, accurate control based on the injection specifications of the injection material such as material liquid and air injected from the injection port directly leads to improvement of the work quality.

  The present invention has been proposed in view of the above-described circumstances, and provides an injection specification evaluation device from a rod injection port capable of appropriately evaluating the injection specification of an injection material injected from an injection port provided on a rod. The purpose is to do.

  In order to achieve the above-described object, the device for evaluating an injection specification from the rod injection port of the present invention has the following features. In other words, the injection specification evaluation device from the rod injection port according to the present invention is a device for evaluating the injection specification of the injection material injected from the injection port provided in the rod, the fixing device for fixing the rod, and the injection Target device for receiving the injection material injected from the mouth, measuring device for measuring the arrival state (impact pressure, etc.) of the injection material injected to the target device, and injection distance for adjusting the relative distance between the injection port and the target device An adjustment device and an injection device that injects an injection from an injection port are provided.

  Further, in addition to the above-described configuration, an injection allowable state that is provided between the injection port and the target device and allows the injection material to be injected toward the target device, and the injection material is injected toward the target device. It is possible to provide a shutter device that can be converted into a shielded state that prevents it from being performed.

  According to the injection specification evaluation apparatus from the rod injection port of the present invention, the relative distance between the injection port provided on the rod and the target device is appropriately changed, and the injection specification of the injection material injected from the injection port is evaluated. be able to. Therefore, the injection performance can be evaluated appropriately and accurately for the injection rod manufactured based on various designs.

  In addition, since a shutter device is provided for controlling the arrival of the injected object with respect to the target device, the injection specification can be evaluated when the injection pressure or the injection amount to be evaluated is reached, so that the injection starts. An accurate evaluation value can be obtained as compared with the case where the projectile is continuously applied to the target device from the time point.

The side schematic diagram of the injection specification evaluation device from the rod injection opening concerning the embodiment of the present invention. The plane schematic of the injection specification evaluation apparatus from the rod injection opening which concerns on embodiment of this invention. The AA arrow line view in FIG.

  Hereinafter, with reference to the drawings, an embodiment of a device for evaluating an injection specification from a rod injection port according to the present invention will be described. FIGS. 1 to 3 illustrate an apparatus for evaluating injection specifications from a rod injection port according to an embodiment of the present invention. FIG. 1 is a schematic side view, FIG. 2 is a schematic plan view, and FIG. FIG.

<Outline of the injection specification evaluation system from the rod injection port>
As shown in FIG. 1 to FIG. 3, the device for evaluating an injection specification from a rod injection port according to an embodiment of the present invention is housed in a housing 10, a fixing device 30 for fixing the rod 20, and the rod 20. A target device 40 that catches the spray injected from the injection port 21, a measuring device 50 that measures the injection specifications of the spray injected to the target device 40, an injection device 60 that causes the injection to be injected from the injection port 21, And a shutter device 70 that shields or allows the projectile to reach the target device 40.

  Furthermore, an injection distance adjusting device 80 is provided as a device for adjusting the relative distance between the injection port 21 and the target device 40.

<Rod>
The rod 20 of the present embodiment is a tubular member that is used when the ground is improved by being inserted into the ground, such as a spray pipe used in the high-pressure jet stirring method. The rod 20 may be any tubular member as long as it has an injection port 21 for injecting an injection material such as water or a material liquid such as a hardened material or air. In general, the high-pressure jet agitation method uses a multiple pipe such as a double pipe and has one or a plurality of jet ports 21.

  Further, as described above, the injection port 21 is an opening for injecting an injection such as a material liquid or air, and there is no limitation on the shape, position, number, and the like. In general, in the high-pressure jet agitation method, a plurality of air injection ports are provided around a material liquid injection port for injecting a material liquid such as water or a curing material. Further, two or more injection ports 21 may be arranged side by side with a predetermined separation, or may be arranged with different phases with respect to the axial direction.

<Rod fixing device>
The rod fixing device 30 is a device for fixing the rod 20 as shown in FIGS. 1 to 3, and any mechanism device such as a clamp, a hook-and-loop fastener, and a band may be used. In addition, when fixing the rod 20, it is necessary to fix the rod 20 reliably so that the direction of the injection material injected from the injection port 21 may not shift. In the present embodiment, three clamps for fixing the rod 20 in a substantially vertical direction are provided at the top and bottom. Moreover, in order to fix the rod 20 reliably, it is preferable to interpose a buffer material between the clamp and the rod 20.

<Target device>
As shown in FIGS. 1 and 2, the target device 40 is a device for receiving a spray injected from the injection port 21, for example, a plate shape provided in a direction substantially perpendicular to the injection direction of the spray. It consists of the member. In the present embodiment, a pair of shielding plates 41 are provided for shielding splashes of the ejected matter that has spread beyond the measurement position, and the ejected matter passes through the interval between the shielding plates 41 provided side by side. ing. In the example shown in FIG. 2, a pair of shielding plates 41 are provided on the left and right with respect to the passage position of the ejected matter. However, a pair of shielding plates 41 may be provided on the upper and lower sides. A pair of shielding plates 41 may be provided on the upper and lower sides.

<Measurement device>
As shown in FIGS. 1 and 2, the measuring device 50 is a device for measuring the arrival state of the ejected material that has been injected into the target device 40. Here, the arrival state of the projectile is a state when the projectile is injected and reaches the target device 40. Therefore, the measuring device 50 may be in any form as long as it can measure the state when the ejected matter is jetted and reaches the target device 40. Thermal paper or jet that detects the heat of the ejected matter A pressure sensitive paper for detecting the impact pressure of the object, a load cell for detecting the injection pressure of the injection object, a strain gauge for detecting distortion due to the injection pressure of the injection object, and the like can be used. In the case where thermal paper is used as the measuring device 50, the ejected material is hot water or hot water whose temperature can be detected.

<Shutter device>
As shown in FIGS. 1 and 2, the shutter device 70 is a device for blocking the ejected matter ejected from the ejection port 21. The shutter device 70 is provided between the ejection port 21 and the target device 40. It is possible to convert between an injection allowable state that allows the injection toward the device 40 and a shielding state that prevents the injection from being injected toward the target device 40.

  As shown in FIGS. 1 and 2, the shutter device 70 of the present embodiment is supported by a pair of support pillars 71 and can move in the vertical direction, and a shutter moving cylinder 73 that moves the shutter 72 up and down. It consists of. Then, the shutter moving cylinder 73 is driven to cause the shutter 72 to enter the passage position of the ejected matter between the ejection port 21 and the target device 40, thereby shielding the ejected matter (the state shown in FIG. 1). And letting the shutter 72 be withdrawn from the passage position of the ejected matter between the ejection port 21 and the target device 40, an injection permitting state for allowing the ejected matter to pass is set.

  In this embodiment, the shutter moving cylinder 73 is used as a device for moving the shutter 72. However, the mechanism for driving the cylinder may be any mechanism such as an electric type, a hydraulic type, and an air type. Good. Further, instead of using a cylinder, a device for moving the shutter 72 may be configured by a gear mechanism using a rack and pinion, a drive motor, or the like.

  The shutter device 70 starts to drive the injection device 60 and is initially in a shielding state when the injection material starts to be injected from the injection port 21. After a predetermined time has passed, the shutter device 70 is set to an injection pressure, an injection amount, or the like to be evaluated. When it reaches, the injection is allowed. In addition, the measurement in the measuring apparatus 50 can be made accurate by adjusting the time for the injection allowed state.

<Injection distance adjustment device>
The ejection distance adjusting device 80 is a device for adjusting the relative distance between the ejection port 21 and the target device 40, and in the present embodiment, the target device 40 is moved. That is, as shown in FIGS. 1 and 2, the injection distance adjusting device 80 moves the support unit 81 (target device 40) along the injection direction of the ejected matter, and the support unit 81 that attaches and supports the target device 40. And a target moving cylinder 82. With the ejection distance adjusting device 80, the positions of the ejection port 21 and the target device 40 can be adjusted.

  In this embodiment, the target moving cylinder 82 is used as a device for moving the target device 40, but the mechanism for driving the cylinder is any mechanism such as an electric type, a hydraulic type, and an air type. Also good. Moreover, you may comprise the apparatus for adjusting the relative space | interval of the injection nozzle 21 and the target apparatus 40 with the gear mechanism using a rack and pinion etc., a drive motor, etc. instead of using a cylinder.

  In the present embodiment, the relative distance between the ejection port 21 and the target device 40 is adjusted by moving the target device 40. However, by moving the rod 20, the ejection port 21 and the target device 40 are moved. The relative spacing may be adjusted.

<Injection device>
The injection device 60 is a device for supplying an injection material such as water or a hardened material liquid or air to the rod 20, and is constituted by a pump, an air compressor, or the like (not shown). By connecting the injection device 60 to the rod 20 through a pipe, a hose, or the like, the injection can be injected from the injection port 21 of the rod 20.

<Evaluation of injection specifications>
In order to evaluate the injection specification of the injection material injected from the injection port 21 using the injection specification evaluation device of the present embodiment, first, the rod 20 to be evaluated is fixed by the fixing device 30, and the rod 20 The distal end portion is closed, and the injection device 60 is connected to the proximal end portion of the rod. In addition, the measuring device 50 is attached to the target device 40. Then, the distance from the ejection port 21 to the target device 40 is adjusted using the ejection distance adjusting device 80, and the ejection path of the ejected matter is blocked by the shutter 72.

  Subsequently, the injection device 60 is driven to inject the injection material from the injection port 21, and when a predetermined time has passed and the injection pressure or the injection amount to be evaluated is reached, the shutter 72 is moved to inject the injection. Open the injection path of the object. At this time, the sprayed product is splashed, but the splash is shielded by the pair of shielding plates 41. When the measurement is completed by causing the injection device to collide with the measuring device 50, the injection path of the injection material is again blocked by the shutter 72, and the drive of the injection device 60 is stopped. As described above, the injection specification evaluation apparatus of the present embodiment can simultaneously evaluate the injection specifications of the injections injected from the plurality of injection ports 21.

DESCRIPTION OF SYMBOLS 10 Housing | casing 20 Rod 21 Injection port 30 Fixed apparatus 40 Target apparatus 41 Shielding board 50 Measuring apparatus 60 Injection apparatus 70 Shutter apparatus 71 Support pillar 72 Shutter 73 Shutter movement cylinder 80 Injection distance adjustment apparatus 81 Support part 82 Target movement cylinder

Claims (2)

It is a device for evaluating the injection specifications of the injection material injected from the injection port provided in the rod,
A fixing device for fixing the rod;
A target device for receiving the ejected matter ejected from the ejection port;
A measuring device for measuring the arrival state of the propellant injected to the target device;
An injection distance adjusting device for adjusting a relative distance between the injection port and the target device;
An injection device for injecting the injection from the injection port;
An apparatus for evaluating injection specifications from a rod injection port.   An injection permission state that is provided between the injection port and the target device and allows the injection material to be injected toward the target device, and prevents the injection material from being injected toward the target device. An apparatus for evaluating an injection specification from a rod injection port according to claim 1, comprising a shutter device that can be converted into a shielding state.

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