JP2912231B2 - Liquid injection device for wood - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for injecting wood into a wood, and more particularly to an apparatus for injecting wood into a wood by a pneumatic bath system.

[0002]

2. Description of the Related Art In general, by injecting various treatment liquids into wood, the wood is made flame-retardant, its dimensions are stabilized, its strength is improved, its antiseptic, termite and insect repellent properties are improved, and it is dyed. It is widely practiced to increase the commercial value by, for example, widening the application by doing so, and various processing liquid injection devices for this purpose are also provided. As one of such processing liquid injection apparatuses, an apparatus employing a so-called pneumatic bath system has been proposed.

[0003] The pneumatic bath type processing liquid injection device includes a processing tank for mounting wood to be processed, and a pressure vessel for accommodating the processing tank. Then, the processing tank on which the wood to be processed is mounted is housed in a pressure vessel, and the processing liquid is introduced into the processing tank. Then, the pressure inside the pressure vessel is reduced and then the pressure inside the pressure vessel is increased so that the treatment liquid is injected into the wood to be treated. The reason why the pressure is reduced before the pressure in the pressure vessel is as described above is to remove gas present in the wood to be treated and increase the efficiency of injecting the treatment liquid into the wood to be treated. After the inside of the pressure vessel is pressurized as described above, the inside of the pressure vessel is decompressed to the atmospheric pressure, and then the processing tank is extracted from the pressure vessel.

Here, in wood processing, it is necessary to reliably inject a predetermined amount of processing liquid into the wood to be treated in accordance with the type of the wood to be processed and the like. The pressurizing conditions such as pressurizing time and pressurizing pressure necessary for injecting into the wood are slightly different for each wood to be treated, and thus cannot be uniquely determined. Therefore, every time the processing liquid is injected into the wood to be processed, it is necessary to measure and manage the amount of the processing liquid in the wood to be processed on site. For this reason, in the above-mentioned conventional processing liquid injection apparatus, immediately after introducing the processing liquid into the processing tank, the liquid level in the processing tank is measured, the pressure in the pressure vessel is reduced, and the pressure inside the pressure vessel is reduced to atmospheric pressure. Then, the lid of the pressure vessel was opened and the liquid level in the treatment tank in the pressure vessel was measured again to determine the amount of the treatment liquid in the wood to be treated.

[0005]

However, in such a conventional processing liquid injection apparatus, the liquid level in the processing tank is measured after the pressure in the pressure vessel is released to atmospheric pressure. And so on. That is, since a part of the processing liquid that once enters the material to be processed by the pressure is returned by the decompression, the amount of the processing liquid in the processed wood at the time of the pressurization and at the time of the decompression is different from each other. But,
The above-mentioned apparatus could measure only the amount of the processing liquid in the wood to be processed at the time of decompression, and could not measure the amount of the processing liquid in the wood to be processed at the time of pressurization. Therefore, it is impossible to control the pressurizing conditions such as the pressurizing time and the pressurizing pressure with reference to the amount of the processing liquid in the wood to be processed at the time of pressurization. Since the pressure condition cannot be satisfied, the injection amount of the processing liquid in the wood to be processed may be less than the predetermined amount, or may exceed the predetermined amount.

Here, since the liquid level cannot be measured unless the lid of the pressure vessel is opened, it is necessary to close the lid and re-inject the processing liquid when the measurement shows that the injection amount has not reached the predetermined amount. And the processing time becomes longer. In addition, when the processing liquid was injected into the wood to be processed in excess of a predetermined amount, the processing liquid was lost. Also, in this case, the processing liquid level may drop too much and the wood to be processed may be exposed on the processing liquid level. May be uneven. In this case, it is necessary to inject the processing liquid again, and in this injection, the pressure reduction time needs to be longer than usual, so that the time loss becomes extremely large.

[0007] Further, the gas escapes from the material to be treated for a while immediately after the start of the depressurization, so that the treatment liquid foams, and the treatment liquid overflows from the treatment tank in the form of bubbles, causing not only loss, but also loss in the treatment tank. Of processing solution is insufficient.
There is also a danger that the material to be processed is exposed when the processing liquid level drops during pressurization. In order to prevent this, the material to be processed is set low, but there is a problem that the volume of the material to be processed is small and the efficiency is low.

The present invention has been made in view of the above-described problems in the conventional processing liquid injection apparatus for wood, and easily and accurately adjusts the level of the processing liquid in the processing tank from outside the pressure vessel. Provided is an apparatus for injecting a processing liquid into wood, which can be measured.

[0009]

SUMMARY OF THE INVENTION In order to solve the problems in such a conventional apparatus for injecting a processing liquid into wood, the present invention according to the first aspect of the present invention provides a processing tank for mounting a processing object wood. An apparatus for injecting liquid into wood having a pressure vessel for accommodating the processing tank, wherein a liquid level gauge for measuring the level of the processing liquid introduced into the processing tank is connected to the processing tank. Provided between the processing tank and the level gauge.
From the processing liquid flowing into the liquid level gauge from the tank, the gas in the processing liquid
This is characterized in that a deaeration unit for separating the air is provided .

[0010]

The present invention described in claim 2 provides the present invention according to claim 1.
In the present invention, the deaeration section is formed of a pipe communicating with a drawing pipe from the processing tank to a liquid level gauge and a return pipe from the liquid level gauge to the processing tank, and the drawing of the pipe is performed. The connecting portion with the pipe is a trap section having a wider cross section than that of the drawing pipe.

[0012] The present invention according to claim 3, claim 1
In the present invention described in the above, the deaeration section, characterized in that it is formed from a bubble separator that communicates with a drawing pipe from the processing tank to the liquid level gauge and a return pipe from the liquid level meter to the processing tank. It is configured.

[0013]

An embodiment of the present invention will be described below in detail with reference to the drawings. FIG. 1 is an overall view of the present apparatus in the present embodiment, and FIG. 2 is a conceptual view of a main part of FIG. First, the configuration of the present apparatus in the present embodiment will be described, and then the liquid level measurement operation in the present apparatus will be described. In each of the above figures, the present apparatus comprises a processing tank 2 for mounting wood 1 to be processed, a pressure vessel 3 for accommodating the processing tank 2, and a liquid level of the processing liquid introduced into the processing tank 2. And a liquid level gauge 4 for measuring the pressure.

The pressure vessel 3 includes a hollow cylindrical body 5 and a body 5.
And a lid 6 openably and closably attached to one end of the building, and is fixed on the foundation of the building by legs. A measuring nozzle 7, a depressurizing nozzle 8 and a pressurizing nozzle 9 are provided on the upper part of the body 5, and the depressurizing nozzle 8 is connected to a depressurizing device 10 and the pressurizing nozzle 9 is connected to a pressurizing device 11, respectively. . Further, drawing pipes 12 and 13 are drawn out from a lower portion of the body 5 on the side of the lid 6, and a rail 14 for receiving the processing tank 2 is provided inside the body 5.

A rail 15 is laid on the side of the pressure vessel 3, and the processing tank 2 can be housed in the pressure vessel 3 by a cart 16 running on the rail 15. Outlet pipes 17 and 18 are provided on the right side of the processing tank 2. When the processing tank 2 is housed in the pressure vessel 3, the outlet pipe 17 is connected to the outlet pipe 12 of the pressure vessel 3 and the outlet pipe 1.
Numerals 8 are connected to the extraction pipes 13 via flexible hoses 19 respectively.

The level gauge described above is provided between the outlet pipe 13 of the pressure vessel 3 connected to the outlet pipe 18 of the processing tank 2 and the return pipe 20 connected to the measuring nozzle 7 of the pressure vessel 3. 4 are connected. The liquid level gauge 4 has substantially the same pressure resistance as the pressure vessel 3, and as shown in FIG. 2, a cylindrical main body 4a and a glass plate 4b provided on one side of the main body 4a.
The glass plate 4b has a liquid level meter 4
A scale 4c for reading the height of the processing liquid flowing into the inside is provided. The level gauge 4 is provided at substantially the same height as the level of the processing liquid introduced into the processing tank 2. The level gauge 4 and the pressure vessel 3 are connected to the extraction pipe 13 and the return pipe 20. Therefore, the liquid level in the liquid level gauge 4 is the same as the liquid level of the processing liquid in the processing tank 2. Therefore,
By reading the liquid level in the liquid level meter 4, the processing tank 2 is read.
The liquid level inside can be read.

In the meantime, ball valve type safety devices 21 and 21 are provided near the upper and lower sides of the liquid level gauge 4, and when the processing liquid in the liquid level gauge 4 flows out due to breakage of the liquid level gauge 4, etc. Further, the safety devices 21 and 21 block the draw-out pipe 13 and the return pipe 20 to prevent further outflow of the processing liquid. This safety device 2
In the vicinity of 1, 21 as shown in the figure, valves 22 to 24 are provided.
Is provided. If a malfunction occurs in the level gauge 4, the valves 22 and 22 are closed to close the level gauge 4.
The processing liquid is prevented from flowing into the apparatus. Valve 2
By opening 3, 23, the processing liquid in the liquid level gauge 4 can be drained or the liquid level gauge 4 can be cleaned. The use of the valve 24 will be described later.

Here, gas is mixed into the processing liquid flowing into the liquid level gauge 4 due to foaming at the time of decompression, and the gas in the processing liquid is distorted by curved portions around the extraction pipe 13 and the safety device 21. May accumulate in constricted areas. Then, the liquid level in the liquid level gauge 4 and the liquid level of the processing liquid in the processing tank 2 do not become exactly the same, and the function of the liquid level gauge 4 cannot be sufficiently exhibited. In addition, the processing liquid may be removed by eliminating the curved portion or the constricted portion or by inclining the extraction pipe 13.
Even if the gas flows into the processing liquid as smoothly as possible, the gas in the processing liquid escapes through the liquid level gauge 4, so that the liquid level in the liquid level gauge 4 becomes unstable and fluctuates. The function of the surface meter 4 cannot be fully exhibited. In particular, it is necessary to mount the liquid level gauge 4 at a high position in order to incline the extraction pipe 13,
In this case, the liquid level that can be measured by the liquid level meter 4 is limited to a high range. Therefore, it is necessary to prevent the gas from remaining in the draw-out pipe 13 and prevent the gas from reaching the liquid level gauge 4.

Therefore, in the present apparatus of this embodiment,
Between the processing tank 2 and the liquid level gauge 4, there is provided a degassing unit 25 for separating gas in the processing liquid from the processing liquid flowing into the liquid level gauge 4 from the processing tank 2. This deaeration unit 25 is provided in FIGS.
As shown in FIG. 3, the pipe is formed as a pipe provided between the extraction pipe 13 and the return pipe 20, and a trap portion 26 is provided at a connection portion of the pipe with the extraction pipe 13. As shown in FIG.
And has a large cross-sectional area.

Next, the liquid level measuring operation in the present apparatus will be described. First, the processing tank 2 on which the wood 1 to be processed is mounted is housed in the pressure vessel 3 using the cart 16 and the rail 15. Then, the outlet pipe 18 of the processing tank 2 is connected to the extraction pipe 13 of the pressure vessel 3 via a flexible hose 19, and the lid 6 of the pressure vessel 3 is closed. Then, the pressure in the pressure vessel 3 is started, and after the gas present in the wood to be processed 1 is evacuated to some extent, the processing liquid is introduced into the processing tank 2 while continuously reducing the pressure. At this time, the valves 23 and 24 are closed, and only the valve 22 is opened. Then, the processing liquid in the processing tank 2 flows into the liquid level meter 4 through the extraction pipe 13 due to the decompression effect. Here, gas is mixed into the processing liquid due to foaming at the time of pressure reduction. However, as shown in FIG. 4, since the cross-sectional area of the trap portion 26 of the degassing portion 25 is larger than that of the extraction pipe 13, The flow rate of the processing liquid is reduced in the trap section 26, and the gas permeated therein rises above the trap section 26 without going to the liquid level meter 4 side. Therefore, the liquid level in the liquid level gauge 4 exactly matches the liquid level in the processing tank 2, and the liquid level level in the processing tank 2 can be managed by the liquid level gauge 4 in real time. Therefore, it is confirmed through the liquid level meter 4 that the processing liquid in the processing tank 2 has reached a predetermined liquid level, and the introduction of the processing liquid is terminated.

Next, the pressurization of the pressure vessel 3 is started. Then, the processing liquid is injected into the wood to be processed 1 by pressurization, so that the liquid level in the processing tank 2 decreases, and the liquid level in the liquid level meter 4 decreases accordingly. Then, the pressure condition is adjusted while observing the liquid level displayed on the liquid level gauge 4, and the amount of the processing liquid in the wood to be processed can be made to match the predetermined amount. After the pressurization, the pressure inside the pressure vessel 3 is released to the atmospheric pressure, the operation of each device is stopped, the lid 6 is opened, and the processing tank 2 is pulled out from the inside of the pressure vessel 3.

Although one embodiment of the present invention has been described above, the present invention may be embodied in various other forms within the scope of the technical idea. For example, as for the liquid level gauge 4, short ones 4A, 4A may be connected in series vertically as shown in FIG. In this case, it is simpler and cheaper to manufacture the liquid level gauge 4A that is shorter than the long liquid level gauge 4, so that the entire apparatus can be configured at low cost. However, in this case, there is a gap between the short level gauges 4A, 4A, and measurement cannot be performed in this gap. To solve this, the short level gauges 4A, 4A are slightly overlapped as shown in FIG. You may connect while making it. Alternatively, as shown in FIG. 7, four short level gauges may be connected via a flexible hose 27, and the mounting height of the level gauge 4 may be changed according to the liquid level.

The trap section 26 of the deaeration section 25 preferably has a large sectional area and a long length. Further, the shape of the trap portion 26 is preferably such that the gas in the processing liquid easily escapes upward. For example, as shown by a dotted line in FIG. 4, the upper portion of the trap portion 26 may be formed into a gentle curved shape having no corners. In addition, deaeration section 25
May be located inside the pressure vessel 3,
In this case, the pressures inside and outside the degassing unit 25 become equal, so that it is not necessary to consider the pressure resistance of the degassing unit 25. However, in this case, the size of the deaeration section 25 must be large enough to be accommodated in the pressure vessel 3.

Further, the deaeration section 25 may be formed as a bubble separator 28 as shown in FIG. The bubble separator 28 is connected to the extraction pipe 13 at each of a side portion 28a and a bottom portion 28b separated by a step H. Here, the gas in the processing liquid that has flowed into the bubble separator 28 rises upward, crosses the step H, and reaches the bottom 2.
Since it does not drop to 8b, it does not flow into the liquid level gauge 4 side.

The longer the step H, the better, and the wider the space 28c above the bubble separator 28, the less the liquid level fluctuation when the stagnant air flows into the bubble separator 28 at once.
Further, at the initial stage of the flow of the processing liquid into the bubble separator 28, the foam at the bottom 28 b of the bubble separator 28 may flow into the liquid level gauge 4. 2
It is safe to fill up to a level near 8a. In this case, it is possible to confirm that the processing liquid is filled using the valve 24. In the vicinity of the bubble separator 28, valves 29, 29 are provided as shown, and by opening these valves 29, 29, the processing liquid in the bubble separator 28 is drained, Cleaning is possible.

[0026]

As described above, according to the first aspect of the present invention, a liquid level gauge for measuring the liquid level of the processing liquid introduced into the processing tank is provided in communication with the processing tank. Between the liquid level gauge
The processing liquid flowing into the liquid level gauge from the processing tank
By providing a degassing unit for separating the gas, the liquid level of the processing liquid in the processing tank can be read outside the pressure vessel in real time, and the level can be added based on the read liquid level. Pressure conditions can be accurately managed. Therefore, time loss and processing liquid loss due to insufficient or excessive injection of the processing liquid are eliminated. In addition, since the liquid level in the processing tank can be checked in real time, the processing liquid is not introduced before depressurization, and the pressure difference between the outside and the outside due to depressurization is used. The processing liquid can be introduced by suction. Accordingly, it is possible to reduce the time conventionally required for charging the processing liquid. Also, at this time, by shifting the start time of the introduction of the processing liquid after the start of the decompression, which often causes the defoaming from the material to be processed, foaming of the processing liquid can be suppressed. Therefore, the processing liquid can be introduced to the upper end of the processing tank without overflowing, and the number of wood pieces to be processed that can be mounted in the processing tank is increased, thereby improving the efficiency. In particular, a degassing section is provided so that the
Gas is separated and accumulates in the processing liquid path to the level gauge.
The height of the liquid between the treatment tank and the level gauge
Can be matched. In addition, gas may escape from the level gauge.
To stabilize the liquid level in the level gauge.
Can be.

[0027]

Further, according to the present invention, the deaeration section is formed of a pipe communicating with the extraction pipe and the return pipe, and a connection portion of the pipe with the extraction pipe is a trap section having a wide cross section. Thereby, the gas in the processing liquid escapes upward in the trap portion, and it is possible to reliably prevent the gas from flowing into the liquid level gauge.

Further, according to the present invention, since the deaeration section is formed by the bubble separator communicating with the extraction pipe and the return pipe, the gas in the processing liquid escapes upward in the bubble separator, Inflow into the liquid level gauge can be reliably prevented.

[Brief description of the drawings]

FIG. 1 is an overall view of an apparatus according to an embodiment of the present invention.

FIG. 2 is a conceptual diagram centering on a liquid level gauge and a deaeration unit in FIG. 1;

FIG. 3 is a conceptual diagram focusing on a liquid level gauge and a deaeration unit in another embodiment.

FIG. 4 is a conceptual diagram of a trap unit.

FIG. 5 is a conceptual diagram of a liquid level gauge according to another embodiment.

FIG. 6 is a conceptual diagram of a liquid level gauge according to another embodiment.

FIG. 7 is a conceptual diagram of a liquid level gauge according to another embodiment.

[Description of Signs] 1 Wood to be processed 2 Processing tank 3 Pressure vessel 4 Level gauge 4a Main body 4b Glass plate 4c Scale 5 Body 6 Cover 7 Measurement nozzle 8 Pressure reduction nozzle 9 Pressure nozzle 10 Pressure reduction device 11 Pressure device 12, 13 Outlet tube 14,15 Rail 16 Bogie 17,18 Outlet tube 19,27 Flexible hose 20 Return tube 21 Safety device 22-24 Valve 25 Deaeration unit 26 Trap unit 28 Bubble separator 29 Valve

Claims (3)

(57) [Claims] 1. A processing tank for mounting wood to be processed,
An apparatus for injecting liquid into wood, comprising a pressure vessel for accommodating the processing tank, wherein a level gauge for measuring the level of the processing liquid introduced into the processing tank is communicated with the processing tank. Between the processing tank and the level gauge, from the processing tank to the level gauge.
To separate the gas in the processing liquid from the flowing processing liquid
A liquid injection device for wood, wherein a deaeration section is provided . 2. The degassing section is formed of a pipe communicating with a drawing pipe from the processing tank to a liquid level gauge and a return pipe from the liquid level meter to a processing tank. 2. The apparatus for injecting liquid into wood according to claim 1, wherein the connecting part is a trap part having a cross section wider than that of the extraction pipe. The method according to claim 3, wherein the degassing unit, characterized by being formed from the air separator in communication from the processing bath to the reversal tubes the extraction tube leading to the level gauge reaches the processing tank from the level gauge according Term
2. The apparatus for injecting liquid into wood according to 1 .