JP3211862B2 - Chemical injection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chemical injection device for injecting a chemical solution in a storage tank into various lines, containers, and the like by a chemical injection pump, and more particularly, to a slime control agent for a water system in a pipe in a paper making process. The present invention relates to a medicine injection device suitable for use in supplying.

[0002]

2. Description of the Related Art In a water system in a paper making process, slime is generated due to increased propagation of bacteria, filamentous fungi, yeasts, and the like, and water flows through pipe slurries, in particular, places with rough wall surfaces in contact with the slurries, transport pipes, and other flow rates of pipe slurries. However, there is a problem that slime adheres to a place where the slime becomes small and stagnates. The slime often peels and clumps to cause various problems such as breakage of paper in the papermaking process and contamination of pulp and paper products.

[0003] For this reason, slime control agents have conventionally been injected into the aqueous system of the papermaking process by a pump to suppress the growth of bacteria, filamentous fungi and the like.

[0004] Such a slime control agent injection device is composed of a drug tank (reservoir), a drug injection pump, a timer, a drug hose, electric wiring, a drug transfer pump, and the like. Although it was installed on a separate table provided on the side, it is said that it is difficult to install such a table in many cases near the water-based transport pipe for injecting the slime control agent There was a problem.

[0005]

When the space for installing another stand as described above is small, it is conceivable to install a medicine pump or a timer on the medicine tank. However, since this slime control agent is corrosive and irritating, this chemical tank must be made of synthetic resin materials such as polyethylene, polypropylene, polyvinyl chloride, polyvinyl acetate, and polycarbonate, which have excellent chemical resistance. When a drug injection pump or the like is installed on a drug tank made of such a material, the upper surface of the drug tank collapses due to the weight of these devices in the long term, reducing the tank capacity, tilting the device, There is a problem that the hose connected to the pump may be twisted or the connection may be distorted, and the chemical solution may leak.

[0006] The present invention has been made in view of the above-mentioned conventional problems, and is directed to a storage tank made of synthetic resin.
It is an object of the present invention to provide a drug injection device in which a drug injection pump, a timer, and the like can be installed on the upper bottom without causing collapse or distortion for a long time.

[0007]

Means for Solving the Problems The invention according to claim 1 has a circular shape.
With the upper base, and reservoir for storing the drug solution, over the circular
It consists of a semi-circular plate-like rigid body with approximately half the area of the bottom.
The arc-shaped outer periphery covers the outer edge of the upper base and is slightly outward.
A support plate mounted on the upper bottom in a state of protruding ,
A drug injection pump mounted on the support plate, and a drug injection unit configured to include a timer, wherein the drug injection pump pumps up the drug solution in the storage tank and pumps the solution. timer, Ri Na is adapted to control the operating time of the chemical feed pump, the upper base, chemical mass injection
A stopper, a through-hole through which a suction-side conduit of the drug injection pump passes, and
An opening including a transfer hose connection hole of the transfer pump;
A small amount protruding upward from the upper surface of the upper bottom at a position other than the opening
At least one protrusion, and the support plate
Having a through hole that fits into at least one of the raised portions
In both cases, the opening and the portion from the opening to the outer peripheral edge in the vicinity are
The chemical feeder you characterized in that it is shaped to cover the upper base upper surface excluding, is to achieve the above object.

According to a second aspect of the present invention, in the first aspect of the present invention, the transfer hose on the discharge side is connected to the storage tank through the upper bottom, and the suction hose on the suction side is disposed outside the lower part of the storage tank. The transfer pump is placed on the outer surface of the storage tank,
It is provided suspended from the support plate.

[0009]

[0010] The invention according to claim 3, claim 1 or the second invention, a discharge tube made of the chemical feed pump connected chemical resin on the discharge side of the connected chemical in the discharge tube Injection tube with a flared flange at the base end, a tip threaded portion fitted around the outside of the tube and screwed into the drug receiving portion around the distal end, When the base screw portion and the chemical dosing tube that can be screwed into the chemical solution outlet of the joint are fitted around the outer periphery of the end portion, when the screw is screwed into the joint from the distal end screw portion, the flange portion is connected to the joint. A metal tube having a distal end surface that presses toward the side, wherein the distal end of the drug injection tube has a length protruding from the distal end thread portion of the metal tube to the drug receiving side.

According to a fourth aspect of the present invention, in any one of the first to third aspects of the present invention, the lower end is attached to the suction side of the chemical injection pump, penetrates the upper bottom, and the lower end extends to the bottom of the storage tank. A suction tube made of a chemical-resistant resin, which is a lateral portion lying on the bottom of the storage tank, and a double-tube structure including an outer cylinder and an inner cylinder made of a chemical-resistant resin, A heavy cone filled with metal powder in a sealed space between the outer cylinder and the inner cylinder, wherein a horizontal portion of the suction hose penetrates through the inner cylinder and projects from the inner cylinder. It is the one that opened.

[0012]

Embodiments of the present invention will be described below in detail with reference to the drawings.

[0013] Chemical injection device 1 according to an embodiment of the present invention.
0 is a storage tank 1 for storing a chemical solution, as shown in FIG.
2 and a semicircular plate-like rigid body having an area approximately half that of the circular upper base 13 of the storage tank, and its arc-shaped outer periphery 14A covers the outer peripheral edge 13A of the upper base 13 and slightly protrudes further outward. A support plate 14 placed on the upper bottom 13 in a state in which the support plate 14 has been inserted, and a drug injection pump 16 mounted on the support plate 14,
Injection unit 22 including timer 18 and outlet 20
And is provided.

Here, the storage tank 12 is formed of a fiber-reinforced synthetic resin of a material having excellent chemical resistance but relatively low physical strength, such as polyethylene, polypropylene, polyvinyl chloride, polyvinyl acetate, and polycarbonate. Have been. The support plate 14 is made of wood, plywood, synthetic resin, paperboard, fiber reinforced resin, or the like, and is made of a material having rigidity capable of maintaining a flat body.

At a position adjacent to the outer surface of the storage tank 12, a transfer pump 26 suspended from the upper bottom 13 by a chain 24 is disposed. The transfer pump 26 has a transfer hose 28 on the discharge side on the exposed surface 13B of the upper bottom 13 that is not covered by the support plate 14,
It is connected via a transfer pipe 28A.

The suction hose 30 on the suction side of the transfer pump 26 is suspended from the upper bottom 13 of the transfer pump 26, and its tip (lower end) is near the outer surface of the storage tank 12 and lower end. It extends to the position, and is configured to be able to suck up the chemical in the chemical transport can 32 that is carried in and arranged adjacent to the storage tank 12.

The exposed surface 13B of the upper bottom 13 has a large amount of chemical liquid injection plug 3 for injecting a large amount of chemical into the storage tank 12.
4, an air vent pipe 36, the transfer pipe 28 </ b> A, and a through hole 40 through which a suction hose 38 on the suction side of the chemical injection pump 16 is inserted.

A projection 42 is formed on the upper bottom 13 at a position other than the exposed surface 13B, and the projection 42 is provided on the support plate 14 side. When placed on the upper bottom 13, a through hole 44 is formed in which the projection 42 fits, thereby forming the support plate 1.
4 is positioned with respect to the upper bottom 13. The support plate 14 is provided with a synthetic resin bolt 4
6 is fixed to the upper bottom 13 by tightening.

The suction hose 38 of the chemical pump 16
Is made of a synthetic resin having high chemical resistance such as Teflon (trademark).
C, and is provided at the tip of a lateral portion 38A extending horizontally in a fixed length range along the lower bottom 13C.

The lateral portion 38A penetrates the weight cone 48,
In addition, the tip protrudes into the filter 50 and is opened.

The weight cone 48 has a double cylinder structure having an outer cylinder 48A and an inner cylinder 48B made of a chemical resistant resin as shown in an enlarged view in FIG. 48B, first and second lid members 49A, 49
9B is filled with a metal powder 48C such as iron powder, and the horizontal portion 38A penetrates through the inner cylinder 48B, thereby forming the horizontal portion 38A.
A is prevented from floating.

Reference numeral 48D in FIG. 2 denotes a second lid member 49B for releasing the air inside when the metal powder 48C is filled in the closed space and then closed by the second lid member 49B. 4 shows an air release hole provided. After the air escape hole 48D is filled with the metal powder 48C and the second lid member 49B is closed, the air escape hole 48D is sealed by inserting a plastic rod 48E and stopping it with an adhesive. Here, the outer cylinder 48
A, inner cylinder 48B, first and second lid members 49A, 49B
The plastic rod 48E is made of polyvinyl chloride.

The distal end of the lateral portion 38A penetrating the weight cone 48 projects into the cylindrical filter 50 and is opened. The filter 50 is formed by extending a synthetic resin net 50B on a frame 50A made of a synthetic resin having a bottomed cylindrical shape. A plug 50C made of synthetic resin is inserted into the opening side. With a lid. The horizontal portion 38A is fixed to the filter 50 by being pressure-loaded into the filter 50 from a guide tube 50D disposed through the plug 50C.

Next, the discharge side of the chemical pump 16 will be described with reference to FIG.

A chemical injection hose 52 having a double structure made of a chemical resistant resin such as Teflon is connected to the discharge side of the chemical injection pump 16.
The T-shaped joint 56, the valve 58, the second T-shaped joint 60, and the second valve 62 are connected in this order. These are all formed from a chemically resistant resin such as Teflon.

An upper portion of a metal tube 64 is screwed into a chemical solution outlet 60A, which is a branch tube of the second T-shaped joint 60, and a lower portion of the metal tube 64 is connected to a white water pipe 66 into which a chemical solution is injected.
Is screwed from above into the side surface.

As shown in FIG. 4 in an enlarged manner, a chemical injection tube 68 is inserted inside the metal tube 64, and a lower portion thereof projects from the lower end of the metal tube 64 by a predetermined distance. 68A.

The proximal end (upper end in FIG. 4) of the chemical injection tube 68 is formed in a flared flange portion 68B.
When screwed into the chemical solution outlet 60A of the mold joint 60, the distal end surface 64B of the metal tube 64 is pressed against the receiving seat 60B of the chemical solution outlet 60A.

When the metal tube 64 is actually screwed into the chemical solution outlet 60A, as shown in FIG. 4, the screw between the proximal threaded portion 64A of the metal tube 64 and the threaded inner peripheral surface of the chemical solution outlet 60A is formed. Teflon sealing tape 70 is interposed between the inner circumference of the metal tube 64 and the outer circumference of the chemical injection tube 68 to form a seal between the members.

The projecting portion 68A of the injection tube 68 is
The tip side screw portion 64C of the metal tube 64 is screwed into the boss portion 66A of the white water pipe 66 as a drug receiving portion, and is projected into the white water pipe 66.

A third valve 56B is attached to the chemical solution outlet 56A, which is a branch pipe of the T-shaped joint 56. When the chemical solution is measured, the third valve 56B is tightened.
The valve 56B is opened to allow the chemical solution to flow out.
A graduated cylinder is placed below the valve 56B to receive the discharged chemical. Normally, the third valve 56B is closed.

The second valve 62 is used when pumping another chemical from the left side in the figure, and is normally closed.

In the chemical dosing device 10, a predetermined amount of a chemical solution is injected into the storage tank 12 from the large amount of chemical injection tap 34 before the device is first operated.

The operation time of the chemical dosing pump 16 is controlled by a timer 18. The chemical dosing pump 16 pumps up a predetermined amount of a chemical solution from the storage tank 12 and sends it under pressure toward the chemical dosing hose 52.

Since the suction hose 38 in the storage tank 12 is disposed inside the weight cone 48, the suction hose 38 is close to the lower bottom 13C of the storage tank 12 and its position is maintained. Therefore,
The chemical in the storage tank 12 is sucked up from the bottom side.

Since the load of the weight cone 48 is also applied to the filter 50 via the lateral portion 38A of the suction hose 38, the filter 50 does not rise or swing, and thus the storage tank 1 does not float.
2 will be held at a position along the lower bottom 13C.

The chemical liquid sucked up by the chemical injection pump 16 and sent out to the chemical injection hose 52 is supplied to the check valve 54,
The liquid reaches the chemical solution outlet 60A of the second T-shaped joint 60 via the T-shaped joint 56 and the valve 58.

A chemical injection tube 68 is attached to the chemical solution outlet by a metal tube 64, and the chemical solution outlet 60A
Is discharged into the white water flowing through the white water pipe 66 through the chemical injection tube 68.

Here, the chemical solution outlet 6 of the second T-shaped joint 60
0A and the boss 66A of the white water pipe 66 are connected by a metal tube 64, inside which a chemical injection tube 68 made of a chemical resistant resin is disposed, and a chemical solution outlet 60A.
A flare-like flange portion 68B is integrally formed on the side, and is pressed against the receiving seat 60B of the chemical solution outlet 60A by the distal end surface 64B of the metal tube 64. 64 does not come into contact.

Further, the metal tube 64 is screwed to the boss 66A of the white water pipe 66 at the tip side threaded portion 64C.
8 further project to form the protruding portion 68A, so that the chemical solution flowing out from the tip of the chemical injection tube 68 is
No contact with 4. Although the white water may come into contact with the white water, the metal tube 64 is not corroded by the white water.

Therefore, in the chemical dosing device 10, the metal pipe 64, which could not be used conventionally due to the problem of corrosion, does not allow the metal pipe 64 to come into contact with the chemical solution, and the injection pipe system for feeding the chemical solution from the chemical injection pump 14. Can be firmly connected to the white water pipe 66 by the metal pipe 64.

When the amount of the chemical in the storage tank 12 falls below a certain value due to the suction of the chemical, it must be replenished.

In the case of replenishment, as shown in FIG. 1, a chemical transport can 32 is carried adjacent to the storage tank 12, and the suction pipe 30 of the transfer pump 26 is inserted.
To transfer the chemical in the chemical transport can 32 to the transfer hose 2.
8 and transferred into the storage tank 12.

In the chemical dosing device 10, the transfer pump 26 is suspended from the support plate 14 by the chain 24. The head of the transfer pump 26 is reduced, and the output of the transfer pump 26 is reduced, so that the size and weight can be reduced.

[0045]

[0046]

[0047]

[0048]

[0049]

The chemical injection device according to the above embodiment injects the slime control agent in the papermaking process into the water system in the pipe. However, the present invention is not limited to this, and other chemical liquids may be used. Is applied to various pipes, containers and the like.

[0051]

Since the present invention is configured as described above, the chemical injection set including the chemical injection pump and the timer in the chemical injection device can be used without causing the storage tank made of synthetic resin to collapse.
It has an excellent effect that it can be placed on the upper bottom to improve space efficiency.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a chemical injection device according to an embodiment of the present invention.

FIG. 2 is a partial cross-sectional side view showing a pyramid and a filter provided at a bottom portion in a storage tank of the drug injection device.

FIG. 3 is a perspective view with a partial cross section showing a pipe of an injection system of a drug solution sent from a drug injection pump in the drug injection device.

FIG. 4 is an enlarged sectional view showing a main part of FIG. 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Drug injection device 12 ... Reservoir 13 ... Top bottom 13A ... Outer peripheral edge 13B ... Exposed surface 13C ... Bottom bottom 14 ... Support plate 16 ... Drug injection pump 18 ... Timer 20 ... Outlet 22 ... Drug injection unit 24 ... Chain 26 ... Transfer pump 28 Transfer hose 30 Suction hose 32 Chemical transfer can 34 Chemical injection large quantity stopper 36 Air bleed tube 38 Suction hose 38 A Horizontal part 40 Through hole 42 Projection 44 Through hole 48 ... heavy cone 48A ... outer cylinder 48B ... inner cylinder 48C ... metal powder 52 ... chemical injection hose 60A ... chemical solution outlet 64 ... metal tube 64A ... distal end surface 64B ... proximal end screw part 66 ... white water pipe 68 ... chemical injection tube

Claims (4)

(57) [Claims] [Claim 1 further comprising a circular upper base, and storage tank for storing a chemical liquid, semi-circular plate-shaped rigid area of approximately half of the circular upper base
And its arcuate outer periphery covers the outer peripheral edge of the upper base.
And a support plate mounted on the upper bottom in a state that the support plate slightly protrudes outward , and a drug injection unit including a drug injection pump and a timer mounted on the support plate. and will be, the chemical feed pump is pumping the chemical solution in said reservoir, and was pumped, the timer, Ri Na is adapted to control the operating time of the chemical feed pump, to the upper base
Is connected to the large-volume infusion stopper and the suction-side line of the drug pump.
Through hole, and a transfer hose connection hole of the transfer pump.
Including the opening, and from the upper surface of the upper bottom at a position other than the opening
At least one protrusion protruding in the direction,
The support plate is fitted to at least one of the protrusions.
A through hole is provided, and the opening and the vicinity from the opening are provided.
It has a shape that covers the upper surface of the upper bottom except for the outer peripheral edge of the side
Chemical feeder said. 2. The transfer pump according to claim 1, wherein a transfer hose on the discharge side is connected to the storage tank through the upper bottom, and a suction hose on the suction side is disposed outside the lower part of the storage tank.
A chemical dispensing device provided at the outer surface of the storage tank so as to be suspended from the support plate. 3. The method of claim 1 or 2, a discharge tube made of connected chemical resin on the discharge side of the chemical feed pump, and the joint of the connected chemical resin on the discharge tube, group A dosing tube whose end is a flared flange portion, a tip screw portion fitted on the outside of the dosing tube and capable of being screwed into a drug receiving portion on the outer periphery of the tip portion, and the joint of the joint at the outer periphery of the base portion. In a state where the base screw portion and the drug injection tube that can be screwed into the chemical solution outlet are fitted, when screwed into the joint from the distal screw portion, the distal end surface that presses the flange portion toward the joint is removed. A metal tube provided with a metal tube, wherein a tip of the drug tube has a length protruding toward a drug receiving side from a threaded portion of a tip of the metal tube. 4. In any of claims 1 to 3, attached to the suction side of the chemical feed pump, through the upper base, the lower end, and reaches the storage tank bottom, and, said reservoir A double-cylinder structure including a suction hose made of a chemical-resistant resin lying on the bottom of the tank and made of a chemical-resistant resin, and an outer cylinder and an inner cylinder made of the chemical-resistant resin. And a heavy cone filled with metal powder in the closed space, wherein a lateral portion of the suction hose penetrates through the inner cylinder and is opened at a position protruding from the inner cylinder. And a drug injection device.