JPH0860580A - Transfer device for papermaking stock - Google Patents

Abstract

PURPOSE: To provide the subject device designed to transfer a papermaking stock from a white water tank to a head tank without decreasing its viscosity. CONSTITUTION: A white water tank 5 is connected, via a suction pipe 6 with an operating valve, to the funnel-shaped bottom of a vacuum tank 1. A head tank 7 is also connected, via a delivery pipe 8 with an operating valve, to the bottom of the vacuum tank 1. The vacuum tank 1 is situated over the head tank 7. The vacuum tank 1 is then put to suction to a vacuum, and by this action, a stock in the white water tank 5 is sucked into the vacuum tank 1 and then delivered into the head tank 7 through its own weight.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for transferring papermaking raw materials mainly used for transferring Japanese paper raw materials.

[0002]

2. Description of the Related Art In the past, when making Japanese paper, manual work was conventionally performed by plowing. However, there is a problem that the work requires a long time, In recent years, for example, Japanese paper raw material, which is a papermaking raw material stored in a head tank, is poured onto a squeeze via a head box, and the skein is shaken to disperse fibers and tilt the skein. Development of a papermaking apparatus that automatically performs operations such as discarding excess white water is underway.

As the washi raw material, bast fibers such as mulberry, mitsumata, and goose are generally used. Since these are long fibers, the fibers are entangled with each other, resulting in "cutting", "shrimp", and "glasses". This is a property that fiber bundling referred to as "" is likely to occur. Therefore, in the raw material of Japanese paper, usually, by mixing a viscous agent, the individual fibers are wrapped with the viscous agent to prevent the above-described fiber binding.

[0004]

However, if a conventional vortex pump or plunger pump is used to transfer the raw material of Japanese paper to the head box of the above-mentioned papermaking apparatus, the raw material is vigorously kneaded and stirred during the transfer. As a result, the viscosity of the viscous agent drops so much that it becomes watery and cannot wrap the fibers, causing the fibers to be entangled with each other, thereby deteriorating the paper quality. Therefore, a large amount of sticky agent must be used, which causes a problem of high cost.

Accordingly, an object of the present invention is to provide an apparatus for transferring a papermaking raw material capable of transferring the papermaking raw material to a head tank without greatly reducing the viscosity of the adhesive.

[0006]

In order to solve the above-mentioned problems, the present invention arranges a vacuum tank at an upper level of a head tank, and vacuums the upper part of the vacuum tank via a first operation valve. A white water tank connected to a pump and connected to the atmosphere via a second operation valve, and a bottom part of the vacuum tank for accommodating a papermaking material mixed with a sticky agent, a third And a bottom tank of the vacuum tank and a head tank are connected to each other by a pay-out pipe having a fourth operation valve.

[0007]

When the second and fourth operation valves are closed and the first and third operation valves are opened to evacuate the vacuum tank, the papermaking raw material contained in the white water tank passes through the suction pipe to be vacuumed. After being sucked into the tank, the first and third operation valves are closed, the second operation valve is opened to bring the vacuum tank to atmospheric pressure, and the fourth operation valve is opened. The raw material is discharged by its own weight through the discharge pipe into the head tank, whereby the papermaking raw material is gently transferred from the white water tank to the head tank.

[0008]

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

FIG. 1 shows an embodiment of the present invention, in which a vacuum tank 1 having a cone-shaped (funnel-shaped) bottom portion is disposed above a head tank 7 to which a raw material is to be transferred. The other end of a suction pipe 2 having one end connected to a vacuum pump 3 is connected to the top of the vacuum tank 1, and a servo valve SV1 as a first operation valve is attached in the middle of the suction pipe 2, and A ventilation pipe 4 provided with a servo valve SV2 as a second operation valve is connected to a portion of the suction pipe 2 upstream of the servo valve SV1.
V2 is closed, servo valve SV1 is opened, and vacuum pump 3
By operating the vacuum tank 1 through the suction pipe 2
The interior of the vacuum tank 1 is made to be at atmospheric pressure through the ventilation pipe 4 by closing the servo valve SV1 and opening the servo valve SV2 while evacuating the inside.

Also, a white water tank 5 for collecting white water and waste water from the paper making section and mixing a new raw material and a viscous agent corresponding to the consumed raw material to supply a Japanese paper raw material 9 as a constantly stable paper making raw material. Is connected to the bottom of the vacuum tank 1 via a suction pipe 6 provided with a servo valve SV3 as a third operation valve, and the Japanese paper material 9 in the white water tank 5 is evacuated by the action of evacuation in the vacuum tank 1. Is vacuum-transferred into the vacuum tank 1 through the suction pipe 6, and a fourth space is formed between the bottom of the vacuum tank 1 and the head tank 7.
When the servo valve SV4 is opened by setting the inside of the vacuum tank 1 to atmospheric pressure and opening the servo valve SV4, the vacuum tank 1 is opened.
The washi raw material 9 in the inside is transferred to the head tank 7 through the discharge pipe 8 by its own weight.

The diameter of the suction pipe 6 is set so that the flow velocity during the transfer of the raw material can be sufficiently reduced.

In FIG. 1, reference numeral 10 denotes a level detector for detecting the level of the raw material in the vacuum tank 1. Reference numeral 11 temporarily stores the Japanese paper raw material adjusted to a constant concentration, and utilizes a head to the white water tank 5 as necessary. Reference numeral 12 denotes a viscosity tank, and 13 denotes an overflow pipe of the white water tank 5.

When the Japanese paper raw material 9 contained in the white water tank 5 is transferred to the head tank 7, first, the servo valves SV2 and SV4 are closed and the servo valves SV1 and SV are closed.
3 is opened and the vacuum pump 3 is operated. When the inside of the vacuum tank 1 is evacuated through the suction pipe 2 by the operation of the vacuum pump 3, the pressure acts on the white water tank 5 through the suction pipe 6.
Through the vacuum tank 1.
At this time, since the bottom of the vacuum tank 1 is formed in a cone shape, turbulence does not occur in the Japanese paper raw material 9 ejected from the upper end of the suction pipe 6. Japanese paper raw material 9 is vacuum tank 1
After being transferred to the inside, the servo valves SV1 and SV3 are closed, and the servo valve SV2 is opened, so that the inside of the vacuum tank 1 is brought to the atmospheric pressure through the ventilation pipe 4. In this state, when the servo valve SV4 is opened, the Japanese paper material 9 in the vacuum tank 1 is transferred into the head tank 7 through the discharge pipe 8 by its own weight.

In the above, the Japanese paper raw material 9 is transferred from the white water tank 5 to the vacuum tank 1 by vacuuming,
Since the transfer of the Japanese paper raw material 9 from the vacuum tank 1 to the head tank 7 is performed by a head, the Japanese paper raw material 9 is not vigorously kneaded and agitated during the transfer as in the case of using a spiral pump or a plunger pump. It can be transported in a quiet state. Therefore, it is possible to prevent the viscosity of the sticky agent in the Japanese paper raw material 9 from being significantly reduced.

Next, FIG. 2 shows another embodiment of the present invention. The vacuum tank 1 has the same structure as the above embodiment.
Discharge pipe 14 equipped with servo valve SV5 at the bottom of
Another head tank 7 is connected via.

In the case of the embodiment shown in FIG.
By opening and closing V4 and SV5, two head tanks 7
It is possible to alternately supply the Japanese paper raw material 9. Therefore, two plows can be placed and the scooping work can be performed alternately, and the efficiency can be improved.

In the above embodiment, the servo valve is used as the operation valve for opening and closing the suction pipe 6, the dispensing pipes 8, 14 and the like, but the suction pipe 6, the dispensing pipes 8, 14 and the like are used. As the flexible tube, a pinch valve that can be opened / closed by supplying / discharging compressed air may be used. In this case, turbulent flow is unlikely to occur when the valve is opened, and long fibers are not caught. In the embodiment, the case where the Japanese paper raw material 9 in one white water tank 5 is transferred to one or two head tanks 7 via one vacuum tank 1 has been described. , Two sets of vacuum tanks 1 and head tanks 7 may be provided as separate lines so that different types of raw materials can be transferred to the head tanks 7, respectively. In the various embodiments, the transfer of Japanese paper raw material was described as being capable of stacking and superimposing by using various sashimi. It goes without saying that various changes can be made without departing from the spirit of the invention.

[0018]

As described above, according to the papermaking material transfer device of the present invention, after the papermaking material in the white water tank is evacuated into the vacuum tank arranged at the upper level of the head tank through the suction pipe, Since it is configured so that it can be delivered to the head tank through the delivery pipe due to the drop, it can be used to vigorously knead and stir the papermaking raw materials as when using a centrifugal pump or a plunger pump. Therefore, it can be transferred in a calm state, and therefore, it is possible to prevent the viscosity of the sticky agent in the papermaking material from being significantly reduced, and it is possible to prevent deterioration of paper quality in advance. Demonstrate.

[Brief description of drawings]

FIG. 1 is a schematic view showing an embodiment of a papermaking material transfer device of the present invention.

FIG. 2 is a schematic view showing another embodiment of the present invention.

[Explanation of symbols]

1 Vacuum tank 5 White water tank 6 Intake pipe 7 Head tank 8 Discharge pipe 9 Washi paper raw material (papermaking raw material) SV1, SV2, SV3, SV4 Servo valve (operating valve)

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shinichi Kimura 390 Akizato, Tottori City, Tottori Prefecture, Tottori Prefecture Industrial Testing Center

Claims (1)

[Claims] 1. A vacuum tank is disposed above the head tank, the upper part of the vacuum tank is connected to a vacuum pump via a first operation valve, and the atmosphere is exposed to the atmosphere via a second operation valve. A white water tank, which is made to communicate with each other and is adapted to accommodate a papermaking raw material mixed with a sticky agent, is connected to the bottom of the vacuum tank via a suction pipe equipped with a third operation valve, and A papermaking material transfer device, characterized in that the bottom part of the vacuum tank and the head tank are connected by a delivery pipe equipped with a fourth operation valve.