JPS62171774A - Paint feeder - Google Patents

Abstract

PURPOSE:To accurately supply a high-viscosity paint at a specified flow rate by providing a paint holder whose rear part is hermetically sealed with a sealing body, a hydraulic cylinder, and two flow and pressure controllers in the title paint feeder for lining the inner wall of a large-bore pipe. CONSTITUTION:A specified paint is injected into the paint holder 9 from an inlet 11, and the holder is tightly closed. The pressure of a fluid to be supplied to the rear chamber 15a of a cylinder and the advancing speed of a piston 17 are regulated to a specified value by flow and pressure controllers 19 and 20. A sealing body 12 is simultaneously moved forward by the protrusion of a piston rod 16 through a connecting lever and a pressing rod 13, and the paint in each paint holder 9 is forced into a paint mixer 7 at 5-10kg/cm<2> pressure and at a specified flow rate, and sent out from a paint discharge port 21. The flow rate is controlled to about 50-100l/min by regulating the advancing speed of the piston rod 16 by the flow and pressure controllers 19 and 20, and the mixing ratio of each paint is determined by the number of the combined paint holders 9. The high-viscosity paint is accurately supplied at a specified flow rate in this way.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to the improvement of a paint supply device used in lining work on the inner wall surface of pipes with large diameters, and is capable of supplying a large amount of extremely high viscosity paint. The present invention also relates to a paint supply device capable of accurately supplying paint in a predetermined flow-1.

(Prior Art) In order to line the inner wall of a large-diameter pipe with a diameter of 200 to 300, as shown in FIG. - Transmission body 2a.

2b is inserted, and 200 to 300 kg of epoxy resin paint P or the like is filled from the paint supply port 3 into the space G between both rolling elements 2a and 2b. Next, compressed air or the like is supplied from the pressurized fluid supply port 4, and both rolling elements 2'a, 2b and the paint P are pushed forward as one body and transferred, thereby forming a paint film on the inner wall surface of the pipe. It is.

By the way, in the lining of this type of large-sized IT, a paint P with extremely high viscosity is used because it is necessary to prevent the paint from dripping during lining, and the viscosity is usually 19,000 c. ps ~80,0OOC
.

Two-component mixed epoxy resin paints are widely used. Furthermore, for supplying the paint P into the space G,
A paint supply device having a configuration as shown in FIG. 5 is often used. That is, the paint a to be mixed is supplied to the mixer by the gear pump 27a through the regulator valve 28a and the flow meter 29a, and the paint is supplied to the mixer by the gear pump 27b through the regulator valve 28b and the flow meter 29b. 30, and the paint P formed by mixing both here is pumped to a desired recess through a flow meter 31, and the mixing ratio of the paint a and the paint so and the paint P supply machine are This control is normally performed by adjusting the opening of the flow rate regulating valves 28a and 28b.

However, the above paint supply device is a gear pump 27a.

Since the paints a and b are sent out by 27b, pulsations in the paint flow rate due to pressure fluctuations are unavoidable.
It becomes difficult to accurately pump high-viscosity paint at a large flow rate. As a result, a paint supply device with a simple structure and a large pumping capacity cannot be easily obtained, and the paint P into the space G cannot be easily obtained.
There is a problem in that it takes a long time to fill the liquid, making it impossible to improve work efficiency.

In addition, when controlling the mixing ratio of paint using a flow rate adjustment valve, the relationship between the opening degree of each flow rate adjustment valve and the effective flow area is different for each pipe, so it is assumed that each flow rate is Even if the opening degree of the regulating valve is set numerically accurately, there is a problem in that the actual paint mixture ratio will be different from the set value.

Furthermore, even if the effective flow area of the flow rate adjustment valve can be set accurately by adjusting the valve opening, the flow of each paint may become irregular due to pressure fluctuations of each gear pump, or There is a problem in that the discharge amount of each paint may vary slightly, causing fluctuations in the mixing ratio of the paints. This problem is the same even if the gear pumps are configured to be driven all at once by one prime mover, and errors in the paint mixture ratio will occur due to the brush strokes of the gear pumps.

Moreover, when adjusting the amount of paint supplied, it is necessary to adjust the opening degree of each flow rate regulating valve. As a result, there is a risk that the mixing ratio may change each time due to each flow rate adjustment valve, making it extremely difficult to control the amount of paint discharged. The above-mentioned costs for the primary paint supply device, namely: ■ The inability to easily obtain a paint supply device with a large capacity and high precision flow control, and ■ In the case of mixed paints, each paint The mixing ratio of the components tends to fluctuate, making it difficult to form a paint of stable quality.The problem is that the paint flow rate cannot be easily adjusted and the mixing ratio fluctuates every time the flow is adjusted. It is easy to place horizontally,
A paint supply device that can efficiently supply a large volume of high viscosity paint, easily control the paint flow rate, and always maintain a stable mixing ratio of 1 even in the case of mixed paints. The first invention provides a paint holder whose interior is filled with paint and whose rear part is sealed by a slidable seal; The basic structure of the invention includes a fluid pressure cylinder that presses; a flow rate pressure regulator for the working fluid supplied to the piston rear chamber of the cylinder; and a flow rate pressure regulator that adjusts the displacement amount from the piston front chamber of the cylinder. It is something to do.

The second invention also provides a paint mixer; a plurality of paint holders whose interiors are filled with paint, whose tip openings communicate with the paint mixer, and whose rear portions are sealed by a slidable sealing body; A fluid pressure cylinder that synchronously presses and slides several concave sealing bodies; A flow rate and pressure regulator of working fluid supplied to the piston rear chamber of the cylinder; and an exhaust layer from the piston front chamber of the cylinder. The basic structure of the invention includes a flow rate pressure regulator.

(Function) By adjusting the flow rate pressure of the fluid supplied to the cylinder rear chamber and the flow 1 of the fluid discharged from the cylinder front chamber, the piston rod is advanced at a constant set speed.

This causes the paint holder seal to slide forward and
Paint is delivered from the holder.

In the case of mixed paint, there are multiple paint holders, and the mixing ratio is set based on the combination of zero failure and cross-sectional area. A plurality of sealing bodies are operated synchronously by the piston rond, and the paint sent out from each holder is mixed in a four-component mixer to form a lining paint.

(Example of Actual Electricity) Hereinafter, embodiments of the present invention will be described in detail based on the drawings. Fig. 1 is a plan view of a paint supply device according to the present invention, and in the figure, 5 is a frame, 6 is a pipe, 7 is a paint mixer, 8 is a check valve, 9 is a paint holder, IO is a tip holder, and 11 is a paint inlet.0 On the pedestal 5 are three pipes for transferring various types of materials to be mixed and room materials. A pipe line 6 is arranged, a check valve 8 is interposed in the middle of the pipe line 6, the tip of the pipe line 6 is connected to a paint mixer 7, and the rear end of the pipe line 6 is connected to a paint holder 9. It is connected to the tip holder 19).

A sealing body 12 is disposed inside the paint holder 9 so as to be slidable in the front-back direction, and the space between the sealing body 12 and the inner wall surface of the holder is kept airtight by a packing 12a. Furthermore, predetermined paints Pa and Pb are injected into the space in front of the sealing body 12 from the injection port 11.

The sealing bodies 12 in each holder 9 are connected to the tip of a piston wand 16 of a cylinder 15 via a pressing rod 13 and a connecting rod 14, and each sealing body 12 slides forward synchronously by the operation of the piston 17. be moved.

In addition, in FIG. 1, 18 is a working fluid supply port, 19 and 2
0 is a flow rate pressure regulator, and 21 is a paint discharge port.

Next, the operation of the present invention will be explained.

A predetermined paint is injected into the paint holder 9 from the injection port 11, and it is sealed.

Next, the pressure of the working fluid supplied to the cylinder i chamber 15a of the cylinder 15 is maintained at a predetermined level by adjusting the flow rate pressure regulator 19, and the pressure of the working fluid supplied to the cylinder i chamber 15a of the cylinder
The flow rate of the fluid discharged from 5b is adjusted by the flow rate pressure regulator 20, and the forward speed of the piston 17 is controlled to a predetermined value.

Due to the protrusion of the piston rod 16, each sealing body 12 is synchronously advanced via the connecting rod 14 and the pressing rod 13, and each paint is transferred to the paint mixer at a predetermined flow rate under a pressure of 5 to 19) [(p/m). 7.

The flow rate of the paint sent out from the paint application port 21 is controlled to about 50 to 19)0 (1/min) by adjusting the flow rate pressure regulator 19, 20 to adjust the forward speed of the piston rond 16. The mixing ratio of each paint is determined by paint holder 9.
It is determined by the number of combinations.

Further, when the paint is not a mixed type, the paint mixer 7 is not necessary, and the paint holder 9 can be provided in a single form.

In the above embodiment, three paint holders 9 having the same outer diameter and length are arranged, and the main ingredient of the epoxy resin paint and the curing agent are mixed at a ratio of 2=1. However, the number of paint holders 9 can be arbitrarily selected.

Further, in the above embodiment, the paint holders 9 having the same outer diameter and length are used, but by changing the cross-sectional area of the holders 9 as appropriate (for example, using two paint holders 9, The cross-sectional area of one side may be twice that of the other), and the mixing ratio of each paint may be adjusted.

FIG. 2 shows the main parts of an embodiment of the pond of the present invention,
Instead of directly injecting the paint into the paint holder 9, a cassette type paint holder 9 in which caulking paint is prefilled is used.

That is, as shown in FIG. 2, a receiving metal fitting 19) is fixed to the front end of the cassette holder 22, and the tip of the cassette-type paint holder 9 (paint cartridge) is hermetically fitted thereto.

The tip of the paint cartridge is configured to be easily opened by camping (not shown) or the like. Further, the rear end is sealed by a movable sealing body 12, and when the sealing body 12 is pushed forward, the paint solution is delivered.

FIG. 3 is a system diagram when the present invention is used for lining the inner wall surface of a pipe, where A is a paint supply device, B is a compressor, 23, 24 is a regulator, and 25 is a flow meter.

For lining, first operate the paint supply device A to supply a paint with a predetermined viscosity required for lining (for example, a two-component mixed epoxy resin paint, viscosity 20,000 to 25,000).
c p s ) into the space G. Next, the valve 26 is closed to supply compressed air into the pipe line 1, and the rolling elements 2
a. The paint aP and the transmission body 2b are pushed forward at a constant speed to sequentially form a lining film on the inner wall surface of the pipe.

The rolling elements 2b at the front are used to prevent the paint from extending and flowing toward the front of the pipe, and the rolling elements 2b at the rear are used to push out the paint and shape the coating surface. be.

(Effects of the Invention) In the first invention, the forward speed of the piston rod 16 is controlled by equalizing the pressure of the working fluid supplied to the cylinder 15 and the flow rate of the fluid discharged from the piston front chamber of the cylinder 15. As a result, it is possible to finely control the paint delivery stroke, and even with high viscosity paint, it is possible to always send the paint in a constant flow layer without causing pulsation. .

In addition, compared to conventional paint supply devices that use gear pumps, it is easy to increase the flow rate of paint even for high-viscosity paints, that is, increase the capacity of the paint supply device, greatly improving the efficiency of paint supply work. becomes possible.

Furthermore, in the second invention, since the sealing bodies 12 of a plurality of paint holders are configured to slide synchronously, the mixing ratio of the paint raw materials can be adjusted by changing the combination of the number of holders and the location of the sealing bodies 12. can be easily changed, and
Even if the paint flow rate changes, the set mixing ratio can always be maintained accurately.

As mentioned above, the present invention has significant practical utility.

[Brief explanation of drawings]

FIG. 1 is a plan view showing one embodiment of the present invention. FIG. 2 is a cross-sectional view of a paint holder according to another embodiment of the invention. FIG. 3 is an explanatory diagram when the present invention is used for lining the inner wall of a pipe. Figure 4 shows the conventional pipe inner wall lining method! This is an existing explanatory diagram, and FIG. 5 is a system diagram of a conventional paint supply device.

Claims (3)

[Claims] (1) a paint holder (9) filled with paint and whose rear part is sealed by a slidable seal (12); a fluid pressure cylinder (15) that presses the seal (2);
a flow rate pressure regulator (19) for the working fluid supplied to the piston rear chamber (15a) of the cylinder (15); a flow rate pressure regulator for adjusting the displacement amount from the piston front chamber (15b) of the cylinder (15); A paint supply device consisting of a container (20). (2) The paint supply device according to claim 1, wherein the paint holder (9) is a replaceable cartridge type paint holder. (3) paint mixer (7); the inside is filled with paint;
a plurality of paint holders (9) whose tip openings communicate with the paint mixer (7) and whose rear portions are sealed by slidable seals (12);
2) synchronously press and slide the fluid pressure cylinder (15
) and; the piston rear chamber (15a) of the cylinder (15)
A paint supply device comprising: a flow rate pressure regulator (19) for the working fluid supplied to the cylinder; and a flow rate pressure regulator (20) for regulating the displacement amount from the piston front chamber (15b) of the cylinder (15).