JPH07287B2 - Method and apparatus for impregnating wood with chemical liquid - Google Patents

Description

TECHNICAL FIELD The present invention relates to a method and an apparatus for impregnating wood with a chemical solution for preserving, insect repellent, fireproofing, etc., and particularly to wood to be treated with a plurality of kinds of chemical solutions. The method and the device are effective when used selectively according to the above.

(Prior Art) Conventionally, various methods and devices for impregnating wood with a chemical solution for treatments such as antiseptic, insect repellent, and fireproof are known. Generally, this type of device has a sealable canister, a drug solution storage tank for storing a drug solution, and a supply of the drug solution between the drug can and the drug solution storage tank.
Equipped with a chemical liquid supply / discharge means for discharging and a compressor for pressurizing the inside of the above-mentioned injection can, the wood to be treated is housed in the injection can, and then the chemical liquid is supplied to the injection can. After that, the chemical liquid is impregnated by pressurizing air to a predetermined pressure.

By the way, it may be necessary to change various chemical solutions to be impregnated depending on the type and application of the treated wood. In such a case, a single drug can is provided with a plurality of drug solution storage tanks for storing different drug solutions, and a pipe and a valve are provided between the drug solution tank and the drug solution can to selectively and arbitrarily It suffices if the chemical solution can be supplied from the chemical solution storage tank. However, simply by supplying the chemical solution directly to the injection can, if the chemical solution of a different type is used after the impregnation treatment using a chemical solution of a specific type according to the change of the treated wood, etc. Since the chemical remains attached to the inner wall of the drug can even after discharge, the chemical that adheres to the inner wall of the drug can be removed by washing so that it does not mix with the new drug, and then the new chemical is supplied. It has to be done, and that work is troublesome.

Therefore, a bat capable of carrying in and out of the drug can is provided, and the wood is loaded into the bat and carried into the drug can, and the drug solution is supplied into the vat, whereby the drug solution inside the drug can. Also, a method and apparatus have been considered in which processing such as pressurization is performed while the wood is held in the bat. According to the method and apparatus using such a vat, the chemical solution does not adhere to the inner wall surface of the drug can, which is convenient when changing the chemical solution to be used.

[Problems to be Solved by the Invention]

When performing the impregnation of the chemical solution using the bat as described above,
There is a problem that the time required to pressurize the air to a predetermined pressure becomes long by press-fitting air. In other words, if the drug solution is stored only inside the vat inside the injection can, a relatively large space is left outside the vat, and it is necessary to press air into this space, but the gas changes in pressure compared to the liquid. Since the volume change corresponding to it is extremely large, it is necessary to send a large amount of air by the compressor in order to press the air into the large space to bring it to a predetermined high pressure, which increases the time required for that. Therefore, there has been a problem that the impregnation treatment efficiency is lowered.

As a method of substantially reducing the space inside the injection can during the chemical solution impregnation process, as shown in JP-A-64-34701, a flexible pressure-resistant bag is provided in the injection can, There is one in which a fluid such as water is fed into the pressure resistant bag when the chemical solution is injected into the pressure resistant bag to keep the pressure resistant bag in an inflated state. However, the device shown in this publication has a structure as described above in order to reduce the usage amount of the chemical liquid in the case where the wood is contained in the chemical can and the chemical liquid is injected without using the bat. . Moreover, since the pressure resistant bag is equipped in the drug can,
There are drawbacks that the structure becomes complicated, control of supply and discharge of fluid to the pressure-resistant bag becomes complicated, and the pressure-resistant bag becomes an obstacle during loading and unloading of wood.

In view of such circumstances, the present invention uses a vat to conveniently change the chemical solution to be used, etc., while performing the impregnation treatment while keeping the wood and the chemical solution in the vat inside the drug can. It is an object of the present invention to provide a method and an apparatus for impregnating wood with a chemical liquid capable of efficiently performing pressurization by press-fitting.

[Means for Solving the Problems]

The method of the present invention, while loading the wood to be treated in a bat with an open upper part, carries this bat into a drug-filling can and seals the drug-filling can, and after supplying a chemical solution in the bat, In the chemical liquid impregnation method of impregnating the chemical liquid into the treated wood by pressurizing air into the chemical can to pressurize the inside of the chemical can to a predetermined pressure, before performing pressurization by pressurizing air into the chemical can, Inside the injection can, a liquid other than the chemical liquid is directly supplied to the space outside the vat, and the liquid is filled up to a predetermined height corresponding to the position near the upper end of the vat, and then the pressure is applied. After the impregnation treatment, the above liquid is discharged from the bottom of the drug can.

Further, the apparatus of the present invention includes a sealable canister, a wood loading bat that can be carried in and out of the canister, and has an open top, and a chemical solution supply means for supplying a chemical solution into the bat. And a pipe for supplying and discharging a liquid, for supplying and discharging a liquid different from the above-mentioned chemical liquid to the space outside the vat in the above-mentioned chemical can, and discharging the liquid through the above-mentioned chemical can. The liquid supply / drain means in which the pipe is connected to the drug can as is done from the bottom of the container, and the pressurizing means for pressurizing the inside of the drug can by pressurizing air into the drug can.

[Action]

According to the configuration of the above method and device, the chemical solution is put in the vat inside the injection can, and the space outside the vat is filled with the liquid up to the height near the top of the vat, and the small amount is left at the top of the vat. By pressurizing air into the space, it is quickly pressurized to a predetermined pressure.

〔Example〕

1 to 3 schematically show the whole chemical liquid impregnating apparatus according to one embodiment of the present invention, and FIGS. 4 and 5 show the state inside the chemical can during the impregnation treatment. In these figures, reference numeral 1 denotes a drug can, which is provided with a substantially cylindrical main body 1a and a door 1b for opening and closing a wood entrance / exit at a side end thereof, and is closed by closing the door 1b. ing. A plurality of (4 in the example shown in FIGS. 1 to 3) drug solution storage tanks 2 are disposed on the side of the drug can 1, and these drug solution storage tanks 2 are of different types. The drug solution is stored.

In addition, 3 is a bat for loading treated wood,
It is formed in a box shape having a size that can be accommodated in the drug can 1 and has an open top. Bars 4 for preventing wood floating are detachably attached to a plurality of places on the upper part of the bat 3. A rail 5 laid in front of the drug can 1, a carriage 6 moving on the rail 5, and a drive device 7 such as a winch are used as a transfer device that can carry the bat 3 into and out of the drug can 1. And are provided. Then, the bat 3 is placed on the dolly 6, and the dolly 6 is driven by a detachable connecting means (not shown).
When the drive device 7 is operated in a state of being connected to, the bat 3 and the trolley 6 are carried into the drug can 1. An inner rail 8 that receives the dolly 6 is provided on the inner wall surface of the drug can 1.

Furthermore, with respect to the above-mentioned injection can 1, chemical liquid storage tank 2, vat 3, etc.,
Chemical liquid supply means 10 for supplying the chemical liquid into the vat 3, water supply / discharge means (liquid supply / discharge means) 25 for supplying / discharging water (a chemical body different from the chemical liquid) to / from the injection can 1, and the injection can 1 A pressurizing means 30 for supplying air to pressurize the drug can 1 is provided therein.

The chemical liquid supply means 10 includes pipes forming a chemical liquid supply passage 11 and a chemical liquid recovery passage 12 respectively connected to the chemical liquid storage tanks 2, and a collecting portion 13 communicating with these passages 11 and 12.
A conduit 14 connected between the collecting portion 13 and the injection can 1,
A flexible tube 15 located in the drug can 1 and communicating with the conduit 14 is provided. A one-touch coupler 15a is provided at the tip of the flexible tube 15, and a corresponding connection port 16 is provided in the butt 3. It is provided at the end. Each chemical liquid supply passage is provided so that the chemical liquid can be selectively supplied from one of the plural chemical liquid storage tanks 2.
11 are provided with valves 17 and 17 ', respectively,
A valve 18 is also provided in each of the chemical liquid recovery passages 12. A valve 19 is also provided in the conduit 14. The collecting section 13 has a cleaning passage 21 and a drain passage.
22 are connected, and valves 21a and 22a are also provided in these passages 21 and 22, respectively.

The water supply / drainage means 25 has a pipe for water supply / drainage, and more specifically, a water conducting pipe 27 for guiding water from the water storage tank 26 to the drug can 1 and a valve 28 for opening / closing the water conducting pipe 27. And has. Then, the water conducting pipe 27 is provided in the medicine can so that water is supplied to and discharged from the space outside the vat 3 in the medicine can 1 and water is discharged from the bottom of the medicine can 1. It is connected to the bottom of 1.

The pressurizing means 30 pressurizes the air by the compressor 31 to pressurize the inside of the drug can 1, but in the present embodiment, the compressor 31 also functions as a vacuum pump and also depressurizes the drug can 1. You can do it. That is, a passage 33 leading to the suction side of the compressor 31 and a passage 34 leading to the discharge side are connected to the air passage 32 leading to the air supply / discharge port of the drug can 1 via the valves 33a and 34a, respectively, and the suction side A passage 35 branched from the passage 33 and a passage on the discharge side
Valves 35a and 36a are provided in a passage 36 branched from 34, respectively. Then, with the valves 33a and 36a opened and the valves 34a and 35a closed, the compressor 31
Is activated, as shown by the broken line in FIG.
Air is sucked into the compressor 31 from the
When the compressor 31 is operated with the valves a and 35a opened and the valves 33a and 36a closed, air is forced from the compressor 31 into the injection can 1 as shown by the solid line in FIG. ing.

The various valves provided in the chemical liquid supply means 10, the water supply / discharge means 25 and the pressurization means 30 and the compressor 31 are controlled by a control unit 40, and the control unit 40,
For example, it is attached to the drug can 1. In addition, a vat 3 loaded with the wood A to be treated is placed in the drug can 1
The bat 3 in the state of being housed in the container (Figs. 4 and 5).
A liquid level sensor (not shown) that detects the height of each liquid level of the chemical liquid B supplied inside and the water C supplied to the space outside the vat 3, and a pressure sensor that detects the pressure inside the drug can 1 ( (Not shown) and the like are provided. Then, a signal such as a start command by a switch operation and a signal from each of the above sensors are input to the control unit 40, and based on these signals and the setting of the timer in the control unit 40, the control unit 40
Various valves are opened and closed via an air cylinder or the like by a control signal from the compressor 31 and the compressor 31 is controlled to be operated or stopped, so that the chemical solution impregnation process is automatically performed.

The chemical solution impregnation method using this apparatus will be described below.

First, in a state where the woods A to be treated are loaded on the bat 3 placed on the dolly 6, these are sent to the drug can 1 by the drive device 7, and then the drive device 7 is connected to the dolly 6. The connection means is removed, and the flexible tube 15 of the chemical solution supply means 10 is connected to the connection port 16 of the bat 3. Then, the door 1b of the drug can 1 is closed. Further, the chemical liquid B is selected according to the type of the wood A to be treated, etc., and the valves 17, 17 'of the chemical liquid supply passage 11 leading to the chemical liquid storage tank 2 are opened. The valves 17 and 17 'may be manually operated, but it is preferable that the valves 17 and 17' are automatically operated in response to a chemical liquid selection signal by a switch operation or the like.

Subsequently, based on a start command by a switch operation or the like, the pressure inside the drug can 1 is reduced by driving the compressor 31 with the valves 33a and 26a of the pressurizing means 30 opened and the valves 34a and 35a closed. At the same time, the valve 19 provided on the conduit 14 of the chemical solution supply means 10 and the valve 28 provided on the water conduit 27 of the water supply means are opened. As a result, the chemical liquid B is sucked into the vat 3 through the chemical liquid supply passage 11, the collecting portion 13, the conduit 14 and the flexible tube 15, and the water C is passed through the water conducting pipe 27 in the injection can 1. It is sucked into the space outside the bat 3. Then, under the control of the control unit 40 based on the detection by the liquid level sensor (not shown), the valve 19 is closed when the liquid level in the vat 3 reaches a predetermined level near the upper end of the vat 3, and the charging can 1 Bat 3
The valve 28 is closed when the water surface in the outer space reaches a predetermined level near the upper end of the bat 3.

Thus, as shown in FIGS. 4 and 5, the space inside the bat 3 and the space outside the bat 3 are filled up to near the upper end of the bat 3 to the extent that the chemical liquid B and the water C are not mixed with each other.
In this state, in order to remove the air from the wood A to be treated, the inside of the drug can 1 is kept in a depressurized state for a certain time, and then the pressurizing means
When the compressor 31 is driven with the valves 34a and 35a of 30 open and the valves 33a and 36a closed, the injection can 1
Air is press-fitted into the drug can 1 to pressurize the drug can 1 to a predetermined pressure (for example, 15 kg / cm ₂ ) which is considerably higher than normal pressure. In this case, the chemical liquid B is contained in the vat 3, and the water C is stored in most of the space outside the vat 3 inside the drug can 1 to reduce the space into which air is press-fitted. Therefore, as compared with the case where air is press-fitted into the entire space outside the bat, the amount of air supply required to reach the predetermined pressure is reduced, and the time required to reach the predetermined pressure is significantly shortened.

When the pressure reaches a predetermined level, the pressurized state is maintained for a predetermined period of time, during which the chemical liquid B is impregnated with the wood A to be treated. After this impregnation treatment, the valve of the specific chemical liquid recovery passage 12 is adjusted in a state where the inside of the chemical can 1 is adjusted to an appropriate pressure higher than atmospheric pressure.
By opening 18 and the valve 19 of the conduit 14, the chemical liquid B is extruded from the vat 3 by the pressure of the air in the drug can 1,
It is collected in the original drug solution storage tank 2. In this case, if necessary, the pressurizing means 30 may be driven to supplement the air for extruding the chemical liquid.

Following the chemical solution recovery process, the inside of the injection can 1 is temporarily depressurized in order to remove the excess chemical solution adhering to the wood A. Then, the inside of the drug can 1 is returned to the positive pressure and the valve 28 of the water conduit pipe is opened, so that the water C flows out of the drug can 1 and is collected in the water tank 26. In this case, the water C is promptly recovered due to the pressure inside the drug can 1 and the own weight of the water C. Note that this water recovery process may be performed simultaneously with the above-mentioned chemical solution recovery process.

After the series of impregnation treatments as described above, the bat 3 and the dolly 6 are carried out of the injection can 1. After the carry-out, another bat 3 loaded with new wood is placed on the carriage 6 and carried in, and the impregnation process is repeated. Since the chemical solution does not adhere to the inner wall surface of the drug can 1, the internal surface of the drug can 1 does not need to be cleaned even if the chemical solution to be used is changed, and the treatment is efficiently performed.

In the apparatus of the above embodiment, the pressurizing means 30 using the compressor 31 is also used as the depressurizing means by switching the valves 33a, 34a, 35a, 36a. The pressure inside the drug can 1 may be reduced by another vacuum pump. Further, the chemical liquid supply means 10 and the water supply / discharge means 25 may be respectively provided with a feed pump.

Further, the shapes of the injection can 1, the vat 3 and the like are not limited to those in the above embodiment, and for example, in order to make the space left above the chemical B and the water C supplied to the inside and outside of the vat 3 as small as possible, the injection can A substantially horizontal inner wall that approaches the upper end of the inner upper bat 3 of 1 may be provided.

〔The invention's effect〕

As described above, according to the method of the present invention, the vat loaded with the wood to be treated is carried into the injection can, and the chemical solution is supplied into the vat, and the space outside the vat inside the injection can. A liquid different from the chemical liquid is supplied, and the liquid is filled up to a predetermined height corresponding to the position near the upper end of the vat, and then pressure is applied by pressurizing air into the injection can. For convenience, etc., the chemical solution is supplied only into the vat, while the space into which air is press-fitted is reduced, and the time required for pressurization can be greatly shortened. Especially, since the liquid is directly supplied to the above space, the structure is simple and the liquid can be easily supplied as compared with the case where a pressure-resistant bag is provided in the drug can and the fluid is sent into the space. By filling the liquid up to a predetermined height corresponding to the position near the upper end of the bat, the space where the air should be injected can be made sufficiently small, and the pressurizing force of the injected air can be increased above the bat. The chemical liquid in the vat can be surely acted from the open portion. Further, by discharging the liquid from the bottom portion of the drug can after the impregnation treatment, the liquid can be completely discharged from the drug can.
Further, since a pressure resistant bag or the like is not provided in the drug can, it has an effect that it does not interfere with the loading and unloading of the bat.

Further, according to the apparatus of the present invention, a sealable canister, a bat for loading treated wood that can be carried in and out of the canister, a chemical solution supply means into the bat, and a liquid supply / discharge device With the piping of, the supply and discharge of a liquid different from the chemical liquid to the space outside the vat in the injection can,
Further, since the liquid supply / drain means connecting the pipe to the drug can so as to discharge the liquid from the bottom of the drug can, and the pressurizing means for pressurizing air into the drug can, the method described above are provided. And the impregnation treatment can be efficiently performed.

[Brief description of drawings]

FIG. 1 is a schematic front view of the entire chemical liquid impregnation apparatus according to an embodiment of the present invention, FIG. 2 is a schematic plan view thereof, FIG. 3 is a schematic perspective view thereof, and FIG. 4 shows a state during impregnation treatment. Partial cutaway enlarged vertical sectional view, FIG. 5 is a sectional view taken along line VV in FIG. 1 ... Injection can, 2 ... Chemical storage tank, 3 ... Vat, 10 ...
Chemical supply means, 25 ... water supply and discharge means, 30 ... pressurizing means.

Claims (2)

[Claims] 1. A bat having an open upper side in which loaded wood to be treated is loaded into a drug can, the drug can is sealed, and a chemical solution is supplied into the vat before the pouring. In a chemical solution impregnation method of impregnating the above-mentioned treated wood with a chemical solution by pressurizing air into the chemical can by pressurizing the inside of the chemical can to a predetermined pressure, the above-mentioned injection is performed before pressurizing air into the injection can by pressurizing air. Inside the medicine can, a liquid other than the chemical liquid is directly supplied to the space outside the vat, and the liquid is filled up to a predetermined height corresponding to the position near the upper end of the vat, then the pressure is applied, and the impregnation by the pressure is applied. A method for impregnating wood with a chemical solution, characterized in that the liquid is discharged from the bottom of a can after treatment. 2. A sealable canister, a wood loading bat which can be carried in and out of the canister and which has an open top, and a chemical solution supply means for supplying a chemical solution into the bat.
Having a pipe for supplying and discharging a liquid, supplying and discharging a liquid different from the above-mentioned chemical liquid to the space outside the vat inside the above-mentioned chemical can, and discharging the liquid at the bottom of the above-mentioned chemical can. Liquid supply and discharge means in which the above pipe is connected to a drug can as is done from
An apparatus for impregnating wood with a chemical liquid, comprising: a pressurizing unit for pressurizing air into the injection can by pressurizing the inside of the injection can.