JPH0545289B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a supply device that automatically supplies chemicals, etc. containing solid content such as slurry or powder to a fluid pipe through which a pressurized fluid flows. It is something.

[Problem that the invention seeks to solve]

Generally, chemical compositions are adjusted by mixing various chemicals in chemical plants such as pharmaceutical and fertilizer manufacturing and polymer chemical industries. When a liquid medicine is supplied to a pipe in which a liquid solution is flowing under pressure, it can be pressurized by a diaphragm pump or a plunger pump and then forced into the fluid pipe.

However, when supplying chemicals containing solid powder such as slurry or powder, such as flocculants for polymeric resins, to fluid pipes, it is difficult to use diaphragm pumps or plunger pumps that operate by valve action. Solid powder gets stuck between the valve body and the valve seat, creating a gap, which prevents effective valve action.

For this reason, when supplying a slurry or powdered drug, the conventional method has been to sufficiently dilute or dissolve it with a liquid and then supply it to a fluid conduit using a pump. For example, when chlorine is used to sterilize water, it is not possible to directly supply the raw powder to the fluid pipe, so it is first turned into an aqueous solution before being supplied.

Therefore, slurry or powder cannot be pumped directly into the slurry, so it must be turned into an aqueous solution or sufficiently diluted before being supplied, which is time-consuming and
It was also difficult to control the supply amount, and the drawback was that the components could not be adjusted with high precision.

[Problem that the invention seeks to solve]

The present invention has been made in view of the above points, and is capable of automatically and directly supplying a chemical containing solid powder such as slurry or powder to a pressurized fluid pipe, and in addition, the supply amount can be easily controlled and accurately. The present invention provides a supply device that can adjust components.

[Means for solving problems]

The present invention will be explained in detail below with reference to the drawings.

1 to 5 show one embodiment of the present invention. In the figures, 1 is a cylindrical cylinder block with one end open, and a fluid pipe 2 is orthogonally connected to this closed end. At the same time, a hopper attachment port 3 is provided at the upper part of the open end side. 4
is a U-shaped relief flow path formed in the upper part of the closed end side of the cylinder block 1. 5 is a support base for fixing the cylinder block 1, and 6 is an O-ring.

Reference numeral 7A denotes a first piston having a hollow cylindrical shape, which is slidably inserted into the open end side of the cylinder block 1.

7B is the second piston, the first piston 7A
and the closed end side of the cylinder block 1, and is attached to the tip of a cylinder rod 8 that slidably passes through the first piston 7A. The second piston 7B operates independently of the second piston 7B.

As shown in FIG. 2, the base end side of the cylinder block 8 to which the second piston 7B is attached is connected to a connecting rod 10B via a vertically provided connecting piece 9B. are brought into elastic contact by a spring 11.

Reference numeral 12B is a second lever, and as shown in FIG.
are connected.

A second cam floor 15B is attached to the middle of the second lever 12B, and this second cam floor 15B is connected to a fourth cam floor 15B attached to the disk 16.
It is designed to be guided by a second cam groove 17B shown in the figure.

Further, as shown in FIG. 2, the first piston 7A is connected at its proximal end to a connecting rod 10A via a vertically provided connecting piece 9A. This connecting rod 10A is connected to a rotatably supported first lever 12A by a pin 14A.
Furthermore, this first lever 12A is supported by a support pin 13A, and a first cam floor 15 is provided in the middle.
A is provided, which is adapted to be guided by the first cam groove 17A as shown in FIG.

Also, the disk 16 for installing the cam is attached to the shaft 18.
The shaft 18 is connected to a geared motor 19. In addition, in the figure, 20 is a cover.

[Effect]

Next, the operation of the supply device having the above structure will be explained.

As shown in FIG. 5A, in the initial state, the solution 21 is flowing through the fluid pipe 2 in a pressurized state.
On the other hand, the powdered medicine 22 to be supplied from the hopper (not shown) through the hopper attachment port 3 is pushed by its own weight into the first piston 7A and the second piston 7B.
The cylinder block 1 is supplied between the cylinder block 1 and the cylinder block 1.

In this case, the first cam floor 15A is
The second cam floor 15B is located at point a of the cam groove 17A shown in FIG.
It is located at point a of

Next, due to the rotation of the geared motor 19, the disk 16 rotates, and the first cam floor 15A
The first cam groove 17A shown in the figure moves from point a to point b, and the first lever 12A rotates forward.
The first piston 7A moves forward. At this time, the second cam floor 15B moves from point a to point b of the second cam groove 17B shown in FIG. The piston 7B also moves forward.

In this way, the first and second pistons 7A,
7B moves forward at the same time, pushing out the powdered medicine 22 held therebetween, communicating with the fluid conduit 2 as shown in FIG. 5B, and forcing the medicine 22 into the solution 21.

At this time, the solution 21 remaining between the second piston 7B and the closed end side is removed from the second piston 7B.
As the fluid expands, it passes through the escape channel 4 and returns to the fluid pipe line 2 side.

Furthermore, while the first and second cam grooves 17A and 17B rotate in the direction of the arrow and rotate from point b to d,
Since the second cam groove 17B has a constant radius, the second piston 7B comes to a halt at the forward limit point. On the other hand, the first piston 7A slowly moves forward and reaches point c, and since the radius of the cam groove 17A is the same from point c to point d, the first piston 7A Fig. 5C with piston 7B
As shown in FIG. 2, the robot is stopped at the forward limit point, and during this period, the powdered medicine 22 between the pistons is completely discharged into the fluid conduit 2.

After this, the first and second cam grooves 17A, 17B
However, when the first piston 7A rotates from point d to point e, the first piston 7A slowly begins to retreat, and the second piston 7B
quickly retreats, and as shown in FIG.
closely adhere to. At this time, the second piston 7B is
Since the spring 11 is attached to the connecting piece 9B connected to this, the impact at the time of a collision can be softened.

Furthermore, the first and second cam grooves 17A, 17B are
When the first piston 7A rotates from point f to point f, the first piston 7A rapidly retreats, and the distance between them widens, and when point f is reached, the state shown in FIG. 5E is reached. From this backward limit point f to point a, both cam grooves 17A and 17B
have the same radius, the first and second pistons 7A and 7B are in a stopped state, and at this time, the powdered medicine 22 is supplied from the hopper again.

By repeating the same operation, cam groove 1
Each time the disk 16 to which 7A and 17B are attached rotates once, a pump action is performed to intermittently push a predetermined amount of the drug 22 into the fluid conduit 2.

〔Effect of the invention〕

As explained above, the supply device according to the present invention does not have a valve unlike a conventional diaphragm pump or plunger pump, so there is no clogging of the valve, and the pressurized fluid pipe is filled with Powder can be supplied directly. Furthermore, by adjusting the number of revolutions of the motor and the rotational speed, the supply speed and amount can be automatically adjusted, and as a result, it has become possible to control the concentration of the additive drug with high precision.

[Brief explanation of the drawing]

1 to 5 show an embodiment of the apparatus of the present invention, in which FIG. 1 is a front view with the upper part of the supply device cut away, FIG. 2 is a plan view of FIG. 1, and FIG. is a front view showing the first cam groove, FIG. 4 is a front view showing the second cam groove, and FIGS. 5A to 5E are front views showing the first and second cam grooves.
FIG. 3 is an explanatory diagram sequentially showing the operating states of the piston. 1... Cylinder block, 2... Fluid pipe line,
3...Hopper installation port, 5...Support stand, 7A...
First piston, 7B...Second piston, 8...
...Cylinder rod, 10A, 10B...Connection rod, 11...Spring, 12A, 12B...
Lever, 15A, 15B...Cam floor, 16
...Disk, 17A, 17B...Cam groove, 19
...Motor, 21...Solution, 22...Drug.

Claims (1)

[Claims] 1. A fluid pipe communicating perpendicularly to the front side of the closed end inside the cylinder block with one end open, and a relief flow formed in the side wall of the cylinder block and communicating the closed end and the fluid pipe attachment part. a hopper attachment port provided on the inner side of the open end of the cylinder block, a first piston provided in the cylinder block, and a rod passing through the first piston to connect the rod to the rod. a second piston attached to the fluid pipe side at the tip, levers connected to the first and second pistons, cam floors attached to these levers, and the cam floors guided respectively;
The first and second pistons are separated in the vicinity of the hopper attachment port, and during this time, the supply body supplied from the hopper attachment port is pushed out into the fluid conduit during forward movement due to the pumping action of the reciprocating motion of both pistons, A feeding device comprising: a cam formed so that the first and second pistons come into close contact with each other during return movement and return after discharging the fluid therebetween.