KR102000280B1 - Apparatus for supplying the exact amount of grout cement - Google Patents

Abstract

The present invention relates to a device for supplying a fixed amount of grout cement. The purpose of the present invention is to provide a device capable of supplying a fixed amount of grout cement and having a simple structure. The device for supplying a fixed amount of grout cement comprises: a hopper having an opening and closing hole in the lower part; an opening and closing unit opening and closing the opening and closing hole by being installed in the hopper; a pump unit connected to the lower part of the hopper, wherein a pump piston reciprocating inside presses the grout cement flowing inside from the hopper; a discharge port formed on one side of the pump unit and discharging the grout cement pressed by the pump unit; a check valve connected to the discharge port and opened for the grout cement to be discharged only when the pump unit presses the grout cement; a distance sensor connected to the lower side of the pump unit and measuring the moving distance of the pump piston; and a control unit calculating and reporting a discharge amount of the grout cement discharged to the discharge port based on the moving distance measurement value of the pump piston, which is measured by the distance sensor, or discharging the fixed amount of the grout cement to the discharge port by controlling the moving distance of the pump piston.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a grout cement dosing apparatus,

The present invention relates to a grout cement dosing device capable of controlling and supplying an accurate amount of grouting cement.

In general, the grouting method is to inject grout material by using a grouting device to cracks or cavities of the soil layer or to the cavity of the rock layer to prevent water leakage due to the solidification of the ground or to prevent the soft ground It is a method of strengthening.

That is, after the injection pipe is inserted into the ground, the grout material is fed through the injection pipe to fill the ground, and after a certain period of time, the ground is solidified and the purpose is to increase the strength of the ground and stabilize the ground.

Also, it is used for the purpose of strengthening the structural stability, cementing the ground, reducing the composition of the ground, and integrating the ground and the structure by injecting and solidifying the grout material such as bridges, dams and cracks in the buildings.

Recently, PS concrete bridges using PS (Pre Stressed) steel (stranded or steel rods) have been actively constructed. In the post tension method, Sheath pipes are filled with concrete, concrete is poured and hardened, and then PS steel is inserted into the sheath pipe to introduce the prestress into the hydraulic jack. In particular, after the PS steel material is strained, the hollow space in the sheath pipe is grout Fill to complete the bridge.

Grout is usually mixed with water and admixture in cement and stirred, and then supplied using equipment such as feeding device, injection device, feeding device and pump.

In this way, the grouting method is used in various fields of civil engineering. It is very important to supply the amount of grouting cement accurately.

Failure to provide the correct amount will result in poor grouting, requiring additional work or creating new work.

On the other hand, excessive supply of grout cement causes wastage, which causes cost increase, and also causes scattering of environmental pollution.

Background Art [0002] Conventional techniques, such as the following prior art documents, mostly refer to a device for simply feeding, pouring, and feeding grout cement or mortar. Some of the technologies have a structure to supply the quantities, but they have a complicated disadvantage because they are weighed by sensors, and there is a high possibility that air will be included during use.

- Korean Registered Patent No. 10-0136431 (Jan. 23, 1998) "Concrete Quantity Uniform Feeding Apparatus for Concrete Tube Production" - Korean Registered Patent No. 10-0555377 (Feb. 20, 2006) "Pumping device for concrete pump car" - Korean Registered Patent No. 10-0456384 (November 1, 2004) "Mortar Pump" - Korean Registered Patent No. 10-1558788 (Oct. 1, 2015) "Grout Injection Pump" - Registration of Korea Utility Model 20-0429922 (October 24, 2006) "Quantity Feeder for Concrete Mortar"

Accordingly, it is an object of the present invention to provide an apparatus capable of supplying a grout cement in a fixed amount while having a simple structure.

That is, it is an object of the present invention to provide a grout cement dosing device capable of supplying an accurate discharge amount by controlling the travel distance of a pump piston after sucking grout cement.

To achieve the above object, according to the present invention, there is provided a grout cement dosing device comprising: a hopper having a lower opening and closing hole; An opening / closing unit installed inside the hopper to open / close the opening / closing hole; A pump unit communicating with the lower portion of the hopper, the pump piston reciprocating inside the pump unit to press the grouting cement introduced from the hopper; A discharge port formed on one side surface of the pump section and discharging grout cement pressed by the pump section; A check valve coupled to the discharge port and opened to discharge the grout cement only when the pump unit is pressurized; A distance sensor coupled to a lower side of the pump unit and measuring a travel distance of the pump piston; And controlling the movement distance of the pump piston to calculate a discharge amount of grout cement discharged from the discharge port to the discharge port based on a measured distance of the pump piston measured by the distance sensor or to discharge a predetermined amount of grout cement to the discharge port, And a control unit.

Here, the opening / closing part includes a supply pipe accommodated in the hopper and arranged so as to communicate with the opening / closing hole and having at least one long hole formed on the outer circumference thereof, an opening / closing cylinder vertically installed in the supply pipe, And an opening / closing valve for opening / closing the opening / closing hole.

The pump unit may include a pump housing coupled to a lower portion of the hopper and having an upper portion communicated with the opening and closing holes, a pump piston slidably reciprocating within the pump housing, and a pump cylinder driving the pump piston.

At this time, the pump cylinder is provided with a pressure sensor for measuring the supply hydraulic pressure, and the controller can calculate the discharge pressure of the grout cement discharged from the pressure measurement value measured from the pressure sensor to the discharge port.

The check valve may include a valve body having one side communicating with the discharge port and having an outlet formed on the other side thereof, a compression spring provided in the valve body in the longitudinal direction, and a resiliently- And a cap for opening and closing the cap.

Alternatively, the check valve may include a valve body having one side communicating with the discharge port and having an outlet formed on a side surface thereof, a valve cylinder coupled to the other side of the valve body and operated by a rod in the valve body, And a cap connected to the rod of the discharge port to open and close the discharge port.

According to the present invention having the above-described structure, the discharge amount of the grout cement can be accurately adjusted by controlling the movement distance of the pump piston which pressurizes and feeds the grout cement filled in the pump housing, and conversely, calculates the travel distance of the pump piston So that the discharge amount of the grout cement can be grasped accurately.

In addition, it is possible to easily supply the metered amount while having a simple structure compared with the conventional one, and there is little risk of air inflow.

1 is a cross-sectional view showing a structure of a grout cement quantitative feeder according to an embodiment of the present invention;
2 is a cross-sectional view showing another embodiment of the check valve of the present invention
Figure 3a is a graphical representation of an operating state diagram
Figure 3B shows the operating state diagram of the present invention
Figure 3c shows the operating state diagram of the present invention

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

For a better understanding of the present invention, the description with reference to the drawings is not intended to limit the scope of the present invention. In the following description, a detailed description of related arts will be omitted when it is determined that the gist of the present invention may be unnecessarily blurred.

1 is a sectional view showing a structure of a grout cement dosing device according to an embodiment of the present invention.

As shown in the drawings, the present invention includes a hopper 100 into which grout cement is introduced, an opening and closing unit 200 that opens to supply the grouting cement to the lower pump unit 300, A pump unit 300 that pressurizes the grout cement supplied from the opening and closing unit 200 and discharges the grout cement to the discharge port 400, a discharge port 400 formed at one side of the pump unit 300 to discharge grout cement pressed, A check valve 500 installed at the discharge port 400, a distance sensor 600 measuring a pressing distance of the pump unit 300, and a controller.

First, the hopper 100 has a container shape such that the grout cement can be dropped and accommodated, and the top portion is wide and narrows as it goes downward.

An opening / closing hole 110 through which the received grout cement can be discharged is formed in the lower portion of the hopper 100.

Next, the opening and closing part 200 may include a supply pipe 210, an opening and closing cylinder 220, and an opening and closing valve 230.

The supply pipe 210 has a hollow shape and has the same cross-section as the opening / closing hole 110. That is, if the opening / closing hole 110 is circular, the sectional view of the supply pipe 210 may be rectangular when the opening / closing hole 110 is rectangular.

The supply pipe 210 is installed to be received in the hopper 100, and is vertically installed and coupled to the opening and closing hole 110. At this time, the lower end of the supply pipe 210 is opened to communicate with the open / close hole 110.

In addition, at least one long hole 211 is vertically formed on the outer circumferential surface of the supply pipe 210. Therefore, the grout cement introduced into the hopper 100 can be introduced into the supply pipe 210 through the long hole 211.

It is preferable that the long hole 211 is formed in the lower part of the supply pipe 210 so that the grout cement received in the bottom of the hopper 100 flows in first.

In addition, an opening / closing cylinder 220 is vertically installed in the supply pipe 210.

To this end, a separate mounting plate 212 is coupled to the upper end of the supply pipe 210 to seal the supply pipe 210. The opening and closing cylinder 220 is fixed through the mounting plate 212, And the rod of the opening / closing cylinder 220 is installed so as to be downward.

An opening / closing valve 230 is coupled to the rod end of the opening / closing cylinder 220.

The opening and closing valve 230 may have an outer diameter equal to or slightly smaller than an inner diameter of the opening and closing hole 110 so that the opening and closing hole 110 can be opened and closed.

The stepped valve 231 may be formed with a step 231 having a stepped shape so as to be seated on the valve seat 313 formed around the opening and closing hole 110.

The operating relationship is such that when the grout cement introduced into the hopper 100 flows into the supply pipe 210 through the elongated hole 211, the rod of the opening / closing cylinder 220 is moved backward so that the opening / The ball 110 is opened. Accordingly, the grout cement is discharged through the opening / closing hole 110 and flows into the pump unit 300.

Closing cylinder 220 is operated to close the opening and closing hole 110 by closing the opening and closing valve 230 when the pump unit 300 is completely introduced.

Next, the pump unit 300 will be described.

The pump unit 300 includes a hollow pump housing 310 coupled to a lower portion of the hopper 100, a pump piston 320 slidingly reciprocated in the pump housing 310, And a pump cylinder 330 coupled to a lower portion of the pump piston 320 to drive the pump piston 320.

The upper end of the pump housing 310 is opened to communicate with the opening and closing hole 110. The flange portion 311 formed at the upper end of the pump housing 310 to be coupled with the hopper 100, Member 312 is engaged.

The head member 312 may be bolted to the flange 311 and may be bolted to the lower end of the hopper 100 to join the hopper 100 and the pump housing 310.

At this time, a valve seat 313 is installed in the head member 312. The valve seat 313 is formed with an inclined portion 313a so that the step 231 of the opening / closing valve 230 is seated.

The head member 312 has a tapered shape so that its inner diameter increases toward the lower side and can be closely attached to the upper end of a pump piston 320 described later.

Inside the pump housing 310, a pump piston 320 is installed so as to reciprocally slide upward and downward.

The pump piston 320 has the same shape as the cross section of the pump housing 310 and presses and pressurizes the grouting cement contained in the pump housing 310.

The upper end of the pump piston 320 may have a shape corresponding to the inner circumferential surface of the head member 312 and may be in close contact with the head member 312. [

A pump cylinder 330 is connected to a lower portion of the pump piston 320 to drive the pump piston 320.

That is, the rod of the pump cylinder 330 passes through the lower portion of the pump housing 310 and is coupled to the lower portion of the pump piston 320.

Accordingly, when the pump cylinder 330 is driven, the pump piston 320, which rises and rises, presses the grout cement contained in the pump housing 310 and pushes the grout cement upward.

Next, the discharge port 400 may be formed on one side of the upper surface of the pump housing 310, which is preferably formed on the head member 312.

The discharge port 400 is an outlet through which the grout cement received in the pump housing 310 can be discharged while being pressed by the pump piston 320 and being pressure-fed.

The discharge port 400 may be formed in a pipe shape and may be screwed on the side surface of the pump housing 310 or the side surface of the head member 312.

Next, a check valve 500 is coupled to the discharge port 400.

The check valve 500 is configured to be opened only when grout cement discharged to the discharge port 400 is discharged, and closed when the discharge port is not discharged.

The check valve 500 may include a valve body 510, a compression spring 520, and a cap 530.

The valve body 510 is connected to the discharge port 400, and a flow path is formed therein. The valve body 510 includes a first body 511 directly coupled to the discharge port 400 and a second body 512 coupled to the first body 511 and having an outlet 513 at a rear end thereof. ). At this time, the first body 511 and the second body 512 are communicated with each other to form a flow path and can be separated from each other.

A compression spring (520) is installed on the flow path of the check valve (500) to maintain a compressed state. Specifically, one end is seated on the flow path of the second body 512, and the other end is in contact with the flow path of the first body 511.

The cap 530 is coupled to the other end of the compression spring 520 so as to be elastically supported. The cap 530 is positioned so as to block the flow path of the second body 512.

Therefore, the cap 530 closes the flow path of the first body 511 by the elastic force of the compression spring 520. However, when the grout cement is discharged to the discharge port 400, As the cap 530 is pushed, the compression spring 520 is compressed and the flow path of the valve body 510 is opened. That is, the grout cement can be discharged to the discharge port (400).

Meanwhile, the check valve 500 may be configured as another embodiment. 2 is a cross-sectional view showing another embodiment of the present invention.

The check valve 500 includes a valve body 510 having one side communicating with the discharge port 400 and having an outlet port 513 formed at a side thereof and a valve body 510 coupled to the other side of the valve body 510, A valve cylinder 540 operated in the body 510 and a cap 530 connected to the rod of the valve cylinder 540 and opening and closing the discharge port 400.

The valve body can be assembled such that the first body 511 and the second body 512 can be assembled and the outlet 513 can be formed on the side surface of the second body 512.

A valve cylinder 540 may be installed at the lower end of the second body 512.

The rod of the valve cylinder 540 is accommodated in the second body 412 and the cap 530 is coupled to the end.

Accordingly, as the rod of the valve cylinder 540 moves back and forth, the cap 530 can operate to open and close the flow path of the first body 511.

In the present invention, a distance sensor 600 may be installed on one side of the pump unit 300 to measure the moving distance of the pump piston 320.

This is to calculate the discharge amount of the grout cement by measuring the moving distance of the pump piston 320 by the distance sensor 600.

The distance sensor 600 may use a smart tape measure or a digital tape measure. That is, it is like a rotary encoder in which a length is calculated by an optical method in proportion to a length of a wire or a strap drawn out from the inside of the main body.

The sensor body 610 is installed on one side of the pump cylinder 330 and the string 620 drawn out from the sensor body 610 is connected to the pump piston 320, Distance can be measured.

Preferably, the upper end of the rod-like measuring terminal is coupled to the pump piston 320, the lower end of the measuring terminal is exposed to the outside through the lower portion of the pump housing 310, And the string 620 may be coupled to the lower end.

Therefore, when the pump piston 320 rises, the moving distance is measured while the string 620 is drawn out from the sensor body 610.

The measured distance measurements may be displayed or transmitted to the controller.

Next, although not shown, the controller may be provided as a controller in the form of a PCB.

The control unit may control the discharge amount of the grout cement and the moving distance of the pump piston 320. [

That is, when the moving distance of the pump piston 320 and the cross sectional area of the pump housing 310 are arithmetically multiplied, the volume of the grouting cement accommodated in the pump housing 310, that is, The discharge amount of the cement is derived.

Accordingly, the control unit receives the measurement value of the movement distance of the pump piston 320 measured by the distance sensor 600, internally calculates and processes the measured value, and notifies the operator of the discharge amount of the grout cement discharged to the discharge port 400 .

The control unit can calculate the moving distance of the pump piston 320 required to discharge the required amount of grout cement.

Therefore, the operator can supply the calculated distance by feeding the calculated amount of the calculated displacement of the pump piston 320 to supply the required amount of grout cement.

In addition, in the present invention, the pump cylinder 330 may be provided with a pressure sensor 700 for measuring the hydraulic pressure supplied thereto.

Conventionally, the discharge pressure is measured by providing a pressure sensor directly to the discharge port. However, since various problems occur in the pressure sensor, it is preferable to install the pressure sensor at the inlet to which the hydraulic pressure is supplied to the pump cylinder in the present invention.

The pressure measurement value measured from the pressure sensor 700 can be transmitted to the control unit. The control unit calculates and processes the pressure measurement value to calculate the discharge pressure of the grout cement discharged to the discharge port 400, You can tell.

At this time, the controller can calculate the discharge pressure of the grout cement discharged to the discharge port 400 from the pressure measurement value measured from the pressure sensor 700, and notify it.

That is, the discharge pressure can be calculated from the pressure measurement value by the relationship between the pressure value measured at the pressure sensor x cross-sectional area of the pump cylinder = discharge pressure x cross-sectional area of the pump housing.

Hereinafter, the operation of the present invention will be described with reference to FIGS. 3A to 3C. 3A to 3C show an operating state diagram of the present invention.

First, the pump piston 320 is in an elevated state and the grout cement is injected into the hopper 100 in a state where the open / close valve 230 is opened.

The introduced grout cement flows into the supply pipe 210 through the long hole 211.

When the pump piston 320 is lowered in this state, the grout cement contained in the supply pipe 210 flows into the pump housing 310 through the opening and closing hole 110 and is filled as shown in FIG.

Then, as shown in FIG. 3B, the opening and closing cylinder 220 is operated to close the opening and closing hole 110 with the opening and closing valve 230.

When the pump piston 320 is lifted by operating the pump cylinder 330 when the height of the pump piston 320 is determined by calculating the amount to be discharged by the control unit, The filled grout cement is compressed and starts to be discharged through the discharge port 400.

At this time, as the grout cement is compressed, the air inside is almost removed.

3C, the compression spring 520 of the check valve 500 is compressed by the discharge pressure to open the cap 530, and the discharge port 400 The grout cement is discharged and supplied.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention may be embodied in many other specific forms without departing from the spirit or essential characteristics thereof. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined by the scope of the appended claims, as well as the appended claims.

100: hopper 110: opening / closing ball
200:
210: supply pipe 211: long hole
212: mounting plate 220: opening / closing cylinder
230: opening / closing valve 231:
300: pump section 310: pump housing
311: flange portion 312: head member
313: valve seat 313a:
320: Pump piston 330: Pump cylinder
400: outlet
500: Check valve 510: Valve body
511: first body 512: second body
513: Outlet 520: Compression spring
530: cap 540: valve cylinder
600: Distance sensor
610: Sensor body 620: Row
700: Pressure sensor

Claims (6)

A hopper having a lower opening / closing hole;
A supply pipe accommodated in the hopper and disposed so as to communicate with the opening and closing hole and having at least one long hole formed in a lower outer circumferential surface thereof, an opening / closing cylinder vertically installed in the supply pipe, An opening / closing unit for opening / closing the opening / closing hole,
A pump housing in which an upper portion communicates with the opening / closing hole at a lower portion of the hopper, a pump piston slidably reciprocating in the pump housing, and a pump cylinder driving the pump piston, A pump section for pressurizing the grout cement;
A discharge port formed on one side surface of the pump section and discharging grout cement pressed by the pump section;
A check valve coupled to the discharge port and opened to discharge the grout cement only when the pump unit is pressurized;
A distance sensor coupled to a lower side of the pump unit and measuring a travel distance of the pump piston;
A pressure sensor provided at an inlet to which the hydraulic pressure of the pump cylinder is supplied to measure a supply hydraulic pressure; And
And controlling the movement distance of the pump piston to calculate a discharge amount of grout cement discharged to a discharge port from a measurement value of movement distance of the pump piston measured by the distance sensor to cause a discharge amount of grout cement to be discharged to the discharge port, And a controller for calculating and indicating the discharge pressure of the grout cement discharged to the discharge port from the measured pressure value measured by the pressure sensor. delete delete delete The method according to claim 1,
The check valve
A valve body having one side connected to the discharge port and having an outlet formed on the other side thereof, a compression spring provided in the valve body in the longitudinal direction, and a cap elastically coupled to the compression spring and opened / And the amount of grout cement to be supplied to the grout cement tank. The method according to claim 1,
The check valve
A valve body having one side connected to the discharge port and having an outlet formed on a side surface thereof, a valve cylinder coupled to the other side of the valve body and operated by a rod in the valve body, And a cap for opening and closing the grout cement.

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