JPH03136803A - Method and equipment for injecting liquid into wood - Google Patents

Abstract

PURPOSE:To obtain excellent liquid-injecting effect and moreover to cause its number of treating processes to be reduced by a method in which after the pressure in a tank has been reduced, while the inside of the tank is pressurized by feeding liquid into the tank with a pressurizing pump, the retained air existing on the surface of the wood to be treated is discharged outside of the tank and simultaneously the liquid is injected into the wood. CONSTITUTION:A suitable number of timbers to be treated are put on a carriage 3, and the timbers 2 to be treated are fixed there. The carriage 3 is received in a pressure vessel 1 by using a carriage 31 and a rail 15, and the vessel is closed with a cover 9. In this state, treating liquid 20 is injected into the pressure vessel 1. The treating liquid is sent therein to the extent such that the timbers to be treated do not appear on the surface of the liquid. Next, a pressure device 6 is operated, a pressure-reducing device 4 is operated, and the pressure in the pressure vessel 1 is reduced to at most 160Torr through the upper pressure-reducing nozzle 10 of the pressure vessel 1, and then the pressure-reducing degree in the pressure vessel 1 reaches upper limit and the pressure-reducing degree in the pressure vessel 1 becomes equal to that in a gas liquid-separating device 16. Then the treating liquid collected in the gas liquid-separating device 16 is restored in the pressure vessel 1 through a valve 17.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method and apparatus for injecting a treatment liquid such as a resin into wood.

[Conventional technology]

Various injection methods and devices of this type have been known in the past, and include injecting various treatment liquids into wood to make it flame retardant, stabilize its dimensions, improve its strength, and improve its corrosion and insect repellency. The value of the product is increased by increasing the height of the product and expanding its uses by further dyeing it.

In these conventional methods and devices, the wood to be treated is stored in an empty tank in advance, and the air inside the tank is first vacuum-sucked to reduce the pressure inside the tank. After the pressure reduction process in the tank is completed, a processing liquid such as a resin liquid is put into the tank while maintaining the reduced pressure state. Finally, the inside of the tank is pressurized so that the treatment liquid is injected into the wood to be treated.

[Problem to be solved by the invention]

By the way, in the conventional method, the reason why the wood to be treated is treated under reduced pressure and then the treatment liquid is put into the tank is because if the treatment liquid is placed in the tank from the beginning, air in the wood will not escape. Unfortunately, it takes a long time to process, and depending on the treatment liquid, it may adhere to the wood surface such as the butt end of the wood to be treated during depressurization, blocking two of the openings necessary for the liquid to enter, resulting in a uniform injection of the treatment liquid. This is because there may be cases where it becomes impossible to obtain.

However, with this method, the number of work steps is increased compared to placing the wood and treatment liquid in the tank from the beginning in order to add the treatment liquid while maintaining the reduced pressure inside the tank. Of course, additional control devices, valves, etc. were required, and improvements were desired.

[Means to solve the problem]

The method for injecting liquid into wood according to the present invention is a method for injecting liquid such as resin liquid into wood in a tank whose interior can be freely depressurized and pressurized, and includes the following steps.

In the first step, the treated wood to be injected is mounted on a truck, the truck is housed in the tank, and then the tank is filled with the liquid.

In the second step, the air in the tank is vacuum-sucked to reduce the pressure in the tank, and the air present in the wood to be treated is discharged together with the air in the tank to the outside of the wood.

In the third step, in the middle of the vacuum suction line that vacuum-sucks the air in the tank from the top of the tank, the vacuum-sucked liquid and air are separated into gas and liquid, and only the air is discharged to the outside. is circulated into the tank.

In the fourth and final step, after the depressurization is completed, the liquid is put into the tank using a pressure pump to pressurize the tank, and the liquid in the tank is released to atmospheric pressure via a valve. The liquid is injected into the wood to be treated while exhausting residual air present in the liquid in the tank or on the surface of the wood to be treated to the outside of the tank.

In addition, instead of the step of releasing the liquid in the tank to atmospheric pressure via a valve, a vacuum suction line from inside the tank is provided separately from the vacuum suction line, and a vacuum suction line that is the same as or similar to the wood to be treated is provided along the way. The process may also include the step of interposing a monitor wood having a specific property, vacuuming the inside of the tank, and discharging air present in the liquid or on the surface of the treated wood to the outside of the tank. .

The device for injecting liquid into wood according to the present invention mainly includes a tank whose interior can be freely depressurized and pressurized, a trolley for loading and storing the treated wood to be injected with the liquid, and the tank. Vacuum suction means for vacuum suctioning the air inside the tank to reduce the pressure inside the tank, exhausting the air inside the tank to the outside of the tank, and exhausting the air existing in the wood to be treated to the outside of the wood, the tank; A vacuum suction line is provided at the top of the tank in the middle of the vacuum suction line that vacuums the air inside, and is connected to the tank side and the pressure reducing device side at the top, and the liquid is vacuum-suctioned by connecting to the tank at the bottom. A gas-liquid separation container that separates air and air into a gas and liquid, discharges only the air to the outside using a pressure reducing device, and circulates the liquid into the tank; A valve is provided for discharging air bubbles existing or attached to the surface of the wood to be treated to the outside of the tank.

In addition, instead of the valve, a monitoring device is interposed in the middle of the vacuum suction line that sucks the inside of the tank, and the monitoring device is integrated with a filter section connected to the decompression line and below the filter section. and a monitor section provided with a monitor section, and the filter section is provided with a monitor wood having the same or similar properties as the wood connected to the decompression line,
The monitor unit may include a monitoring window for visually checking whether or not the liquid has passed through the monitor member at a position where the liquid that has passed through the monitor member drips.

The wood to which this invention can be applied is not particularly limited, but for example, cedar, red pine, black pine, Japanese pine, Ezo pine, Japanese pine, Japanese fir,
Coniferous trees such as cypress, sara, spruce, ichii, and asunaro, makanba, beech, zelkova, oak, maple, shinanoki, elm, sedge, sawtooth oak, nara, shininoki, cherry tree, chestnut tree, paulownia, katsura, Examples include hardwoods such as lauan, cempus, mahogany, avitone, agathis, teak, oak, rosewood, and ebony.

In addition, the shape of the material to be treated may be any shape as long as it can be loaded into a container, such as a log, veneer, square timber, or board.
Processed wood such as plywood or laminated wood, particle board, or fiberboard may also be used.

Examples of flame retardant treatment liquids include diammonium hydrogen phosphate, inorganic water-soluble salts such as boric acid, sulfamates, halogen compounds, compounds containing phosphorus and nitrogen, guanidine compounds, and metals such as antimony oxide. Materials containing flame retardants such as oxides can be used.

Examples of treatment liquids for dimensional stabilization include polyethers such as polyethylene glycol and polypropylene glycol, polyethylene glycol mono(meth)acrylate, saturated polyester resins, poly(meth)acrylates or copolymers thereof, and urethane. Resin, polyvinyl alcohol, paraffin, vinyl acetate copolymer, polyamide resin, polyimino resin, aminoplast resin,
Fluororesin, silicone resin, vinyl copolymer resin, 5B
A solution or dispersion of RSNBR etc. can be used.

Examples of processing liquids for strengthening include monomers represented by styrene, (meth)acrylate, vinyl acetate, diallyl phthalate, divinylbenzene, (meth)acrylic acid, acrylonitrile, vinylidene chloride, unsaturated polyester resins and styrene monomers, - Solutions or dispersions of reactive polyurethane resins, phenol resins, alkyd resins, urea resins, melamine resins, vinyl esters, epoxy resins, etc. can be used.

Examples of preservative treatment agents include copper compounds, chromium compounds, arsenic compounds, boron compounds, pentachlorphenol, naphthenic acid metal salts, organotin compounds, chlornaphthalenes, 8-quinolite copper, cabtanes, taleosote oil, Examples include processing solutions containing preservatives such as Wolman's salt and chromated zinc chloride.

Treatment liquids for insect repellent include, for example, Wolman's salt, Boliden salt, organophosphorus, carbamate, organotin compounds, chlordane, heptachlor, dieldrin, aldrin, thiodan, γ-BHC (1,2,3,4,5 ,6
, -hexachlorocyclohexane), DDT (1,1
, I-)lichloro-2.2-bis(p-chlorophenyl)ethane], methoxychlor(1,1,1-t-lichloro-2゜2-bis(p-methoxyphenyl)ethane),
Treatment agents containing insect repellents such as toxaphene, kebone, sulfonamides, thiophene oil, and organic thiocyanate m can be mentioned.

As a treatment solution for staining, for example, chrysophenin G
Direct dyes such as X, Direct Brown M, etc., acid dyes such as Suminol Fast Orange PO, Suminol Fast Brown R, etc., basic dyes such as Safranin, Auramine, etc., alcohol-soluble dyes, oil-soluble positive dyes, as necessary. Examples include solutions or dispersions containing dyeing aids, surfactants, etc., depending on the situation.

Examples of media for creating these treatment solutions include:
Water, alcohols, glycols, aromatic hydrocarbons,
Aliphatic hydrocarbons, alicyclic hydrocarbons, ketones, esters, halogen compounds, acids, dioxane, tetrahydrofuran, DMF, DMSO, etc. are used.

The viscosity of the treatment liquid used in the present invention is determined in relation to the properties of the wood to be treated, but generally a viscosity of 1000 cps or less is preferred.

The pressure reduction treatment in the method of the present invention is performed at an absolute pressure of 160 Torr.
It is preferable to do the following: At higher absolute pressures, it may be difficult to efficiently remove gases present in the wood to be treated.

The pressure treatment in the method of the present invention is 1 to 50 kg/c4
It is desirable that the treatment be carried out at a pressure of 8 to 50 kg/c1il, especially at a pressure of 8 to 50 kg/c1il. Please be careful as it may be deformed.

The monitor wood is used to preferentially discharge air present in the treatment liquid or remaining on the surface of the treated wood to the outside of the system.
Although it was mentioned above that it is provided to prevent the treatment liquid from penetrating into the wood, this mechanism is not clear. It is presumed that the conduit pores in the monitor wood piece play the role of a filter that separates low-molecular substances such as air from high-molecular substances. Of course, it is preferable that the wood pieces are of the same species as the wood to be treated, but any wood pieces that are similar can be used.

[Effect]

First, the treated wood to be injected is placed on a truck, the truck is housed in the tank, and the tank is filled with liquid. Next, the air inside the tank is sucked from the upper part of the tank by a vacuum suction means to reduce the pressure inside the tank.

Then, together with the air in the tank, the air present in the wood to be treated is discharged to the outside of the wood.

Here, in the middle of the vacuum suction line that vacuum-sucks the air inside the tank from the top of the tank, the vacuum-sucked liquid and air are separated into gas and liquid, only the air is discharged to the outside, and the liquid is circulated into the tank. Finally, when the inside of the tank is pressurized and the inside of the tank is opened to atmospheric pressure via a valve, the air present in the liquid in the tank or on the surface of the wood to be treated is discharged outside the tank. At the same time, the liquid is injected into the wood to be treated.

The same applies when using a monitor instead of a valve.
In this case, when most of the air in the tank is exhausted to the outside of the system, the injection liquid passes through the monitor wood and begins to drip into the monitor section of the monitor device. Since the monitor wood and the treated wood have the same or similar properties, if this dripping can be visually observed through the monitoring window of the monitor unit, it can be confirmed that the treatment liquid has sufficiently penetrated into the treated wood in the tank.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

Figures 1 to 4 show an embodiment of the present invention, and the device for injecting liquid into wood according to this embodiment mainly consists of a pressure vessel l whose inside can be freely pressurized and depressurized, A cart 3 for loading wood 2, a pressure reducing device 4 for reducing the pressure inside the pressure vessel 1, and a pressurizing device 6 for supplying compressed air to the pressure reducing device 4.
, a pressurizing device 18 for pumping the processing liquid 20 into the pressure vessel 1, a gas-liquid separation vessel 16, and a valve 7.

The pressure vessel 1 consists of a hollow cylindrical body 8 and a lid 9 attached to one end of the body 8 so as to be openable and closable, and is fixed on a foundation by legs. A pressure reducing nozzle lO and a pressure nozzle 11 are provided in the upper part of the barrel 8.

The pressure reduction nozzle 10 is connected to the pressure reduction device 4, and the pressure nozzle 11 is connected to the pressure device 18, respectively. Further, a processing liquid draw-out pipe 12 is provided at the bottom of the barrel 8 .

Note that a rail 15 for receiving the trolley 3 is provided inside the pressure vessel l.

The truck 3 having a rail 30 laid on the M9 front side of the pressure vessel 1 can be stored in the pressure vessel 1 and taken out from the pressure vessel 1 by a truck 31 running on the rail 30.

The truck 3 carries the wood 2 to be treated, and the wood 2 to be treated loaded on the truck 3 transfers the treatment liquid 20 to the pressure vessel 1.
This is to prevent the wood 2 to be treated from floating up when placed in the container. Note that when the wood to be treated, especially the square timbers, are mounted on the trolley 3 in close contact with each other, for example, a small piece of wood is placed between each of the timbers to be treated 2 so that the air released from the timber 2 to be treated can easily escape to the upper part of the pressure vessel 1. It is best to sandwich the

However, in the case of logs, such processing is not necessary.

Further, a processing liquid draw-out pipe 12 is provided at the bottom of the pressure vessel 1 .

Each of the pressure reducing devices 4 vacuum-suctions the air inside the pressure vessel 1 and discharges the air inside the pressure vessel 1 to the outside to reduce the pressure inside the pressure vessel 1. This is a vacuum suction means for discharging the treated wood 2 to the outside.

The pressure reducing device 4 is for vacuum suctioning the air inside the pressure vessel 1 to reduce the pressure inside the pressure vessel 1, and has a plurality of nozzle blocks 25 connected therein.

As shown in FIG. 2, the nozzle block 25 is constructed by forming a throat 31 within a block body 26, and attaching a nozzle 33 to a front end opening 32 of the throat 31. The overall dimensions are approximately 45 m/a+. Front end opening 3 of throat 31
2 expands toward the end, and the diameter of its outer end is D=1.5d with respect to the diameter d of the nozzle hole 33a of the nozzle 33.
The tip of the nozzle 33 and the gap t (approximately 0.5 mm)
It is open across the Like the front end, the rear end of the throat 31 is flared toward the end and connected to the discharge hole 34 . The base end of the nozzle 33 is screwed into a cavity 35 provided in the block body 26. A suction port 36 that opens inside this cavity 35 is connected to an intake hole 37 .

The nozzle 33 has a cylindrical portion 38 extending from the tip to a slight length (approximately 0.3 w) at the base end, and a cylindrical portion 3″8.
The conical part (length in the axial direction is 21 mm) widens from the root.
111). In the nozzle block 25 shown in FIG. 2, a nozzle hole 33a is connected to an inlet hole 39 for compressed air. The compressed air inflow hole 39 is connected to the discharge line 61 of the pressurizing device 6 (for example, a compressor), and the inlet hole 39
7 is a pressure reduction nozzle lO via a pressure reduction tank in a pressure reduction device.
It is connected to the.

FIG. 3 shows test results of the pressure reduction effect of a pressure reduction device configured using this nozzle block 25.

The target for depressurization is a vacuum tank with a 9059Il container.
In the figure, a shows a vacuum degree-time curve when 10 nozzle blocks are connected in parallel, b shows 40 nozzle blocks, and C shows 68 nozzle blocks connected in parallel.

In addition, the straight lines d to i shown as comparative examples are depressurization degree-time straight lines produced by a vacuum pump manufactured by Sato Vacuum Machinery Industry ■ (address: 1036 Fujikubo, Miyoshi-cho, Iruma-gun, Saitama Prefecture). This straight line d
-2 is calculated from the performance diagram in Figure 4, SW, ST in Figure 0.
The number following KS indicates the pumping speed (f/win), and the number following KS indicates 1/100 of the pumping speed (j!/win).

When 68 nozzle blocks 25 are connected (curve C),
It can be seen that it exerts a considerably stronger vacuum suction force than a vacuum pump of comparable price (the straight line in Figure 3, indicated by i). That is, by using this nozzle block 25, a vacuum suction force equivalent to that of an expensive vacuum pump can be obtained at a low cost, and the price of the entire system can be reduced. In addition, vacuum pumps generally require regular maintenance to maintain their performance, but if this nozzle block 25 is used, it can be made maintenance-free. Furthermore, since the number of connections of the nozzle block 25 can be adjusted freely, a desired vacuum suction force can be easily obtained and the system configuration can be easily changed.

The pressurizing device 6 is connected to the pressure reducing device 4 and supplies compressed air for vacuum suction to the pressure reducing device 4.

The pressure bag W18 is connected to the pressure nozzle 11 on one side and to the reserve tank 19 for the processing liquid 20 on the other side.

The gas-liquid separation container 16 is provided in the upper part of the pressure vessel 1 in the middle of a vacuum suction line 63 that vacuum-sucks the air inside the pressure vessel 1 . Moreover, the gas-liquid separation containers 16 are connected at their upper portions to the pressure reduction nozzle 10 on the pressure vessel 1 side, and are also connected to the pressure reduction device 4 side. Therefore, the vacuum suction force by the pressure reducing device 4 is applied to the vacuum nozzle 10 via the gas-liquid separation container 16.
At this point, the air inside the pressure vessel 1 is sucked in, but in this case, the pressure vessel 1 is filled with the treatment liquid 20, and since the liquid level of the treatment liquid 20 is high, the air coming out of the wood 2 to be treated causes The foamed processing liquid 20 is simultaneously sucked in and led to the gas-liquid separation container 16, where it is separated into air and processing liquid 20.
0 is housed in the gas-liquid separation container 16. Therefore, it is possible to prevent the processing liquid 2o from reaching the pressure reducing device 4.

Furthermore, the lower part of the gas-liquid separation chamber 2316 is connected to the upper part of the pressure vessel 1 via the valve 17, and when the degree of pressure reduction in the pressure vessel 1 reaches the upper limit, the pressure reduction in the pressure vessel 1 and the gas-liquid separation container 16 is reduced. When the temperature becomes the same, the processing liquid 2o accumulated in the gas-liquid separation container 16 passes through the valve 17 and returns to the pressure container 1.

The valve 7 is connected to the processing liquid draw-out pipe 1 provided at the bottom of the pressure vessel 1.
2, the treatment liquid 20 in the pressure vessel 1 is exposed to the atmosphere, and the treatment liquid 20 is connected to the wood 2 to be treated.
Air bubbles adhering to the surface of the pressure vessel 1 are discharged to the outside of the pressure vessel 1. This valve 7 is opened slightly by manual operation or by being operated intermittently using a solenoid valve.

Further, a discharge pipe 71 is connected to the valve 7, and the other end of this discharge pipe 71 faces into a discharge tank 72. Note that the discharge tank 72 is connected to the reserve tank 19,
The processing liquid 20 is returned to the reserve tank 19.

Next, the operation of this embodiment will be explained.

First, an appropriate number of pieces of wood 2 to be treated are mounted on the cart 3, and the pieces of wood 2 to be treated are fixed. Then, the cart 3 is stored in the pressure vessel 1 using the cart 31 and the rail 15, and the lid 9 is closed. In this state, the processing liquid 20 is injected into the pressure vessel 1. After injection, the treatment liquid 2o is poured until the treated wood 2 does not come out above the liquid level.

Next, the pressurizing device 6 is operated and the pressure reducing device 4 is operated to reduce the pressure inside the pressure vessel 1 to 160 Torr or less by the pressure reducing nozzle IO in the upper part of the pressure vessel 1.

From the time when the inside of the pressure vessel 1 exhibits the desired reduced pressure state, 1 more
Continue vacuuming for 0-120 minutes. As a result, the air inside the wood 2 to be treated is discharged to the outside. In this case, the vacuum suction force by the pressure reducing device 4 reaches the pressure reducing nozzle 10 via the gas-liquid separation container 16 and sucks the air inside the pressure container 1, but in this case, the pressure container 1 is filled with the processing liquid 20. and treatment liquid 20
Because the liquid level is high, the treatment liquid 20 foamed by the air coming out of the wood 2 to be treated is simultaneously sucked into the gas-liquid separation container 1.
6, where it is separated into air and processing liquid 20, and the processing liquid 20 is stored in a gas-liquid separation container 16. Therefore, it is possible to prevent the processing liquid 20 from reaching the pressure reducing device 4. Furthermore, when the degree of vacuum in the pressure vessel 1 reaches the upper limit and the degrees of vacuum in the pressure vessel 1 and the gas-liquid separation vessel 16 become the same, the processing liquid 20 accumulated in the gas-liquid separation vessel 16 passes through the valve 17 and the pressure is reduced. It will return to the container 1.

Next, the pressure reduction nozzle 1o at the top of the pressure vessel 1 is closed, and the pressure is increased to 8 to 10 k by the pressure nozzle 11 at the top of the pressure vessel 1.
A compressed processing liquid 20 of g/c1i is sent into the pressure vessel 1. The pressure applied by this compressed processing liquid 20 is approximately 10 to 1
Continue for 20 minutes.

At the same time as the pressure inside the pressure vessel 1 is increased, the inside of the pressure vessel 1 is opened to atmospheric pressure by slightly opening the valve 7 manually or by opening it intermittently using a solenoid valve. Air existing in the liquid in the container 1 or on the surface of the wood 2 to be treated is discharged to the outside of the pressure container 1. In this case, the processing liquid 20 is discharged to such an extent that the pressure within the pressure vessel 1 does not drop suddenly. The discharged processing liquid 20 is guided into a discharge tank 72 via a discharge pipe 71, and the processing liquid 20 in the discharge tank 72 returns to the reserve tank 19 for circulation.

Thereafter, after stopping the operation of each device and returning the pressure inside the pressure vessel 1 to normal pressure, the lid 9 is opened and the cart 3 is pulled out, so that the wood treated with the liquid injection can be taken out.

When liquid was injected into beech wood using the apparatus of this example, the injection rate of the treatment liquid was 115 to 129% by weight (average value 121% by weight). In conventional methods and devices, the overlap is at most 70 to 80%.

Other embodiments are shown in FIGS. 5 and 6.

In this embodiment, the processing liquid draw-out pipe 12 in the above embodiment is
In place of the valve 7 connected to the valve 7, a pair of processing liquid conduits 13.14 are connected to the processing liquid draw-out pipe 12, and monitor devices 170, 170 are interposed between the pair of processing liquid conduits 13.14, respectively. It is connected to the pressure reducing device 5.

The pressure reducing device 5 removes the processing liquid 20 in the pressure vessel 1 by vacuum suction.
is sucked out and removed from the wood 2 present in the treatment liquid 20 or to be treated.
This is a vacuum suction means for discharging air bubbles attached to the surface of the pressure vessel to the outside of the pressure vessel.

The monitor device 170 includes a filter section 171 connected to the processing liquid conduit 13 (14), and a monitor section 172 integrally attached below the filter section 171.

FIG. 6 is a detailed diagram of the monitor device.

The filter section 171 is connected to the treatment liquid conduit 13 (14), and has monitor wood 173 having the same or similar properties as the wood 2 to be treated.

The piping of the liquid to be treated conduit 13 (14) is connected to the filter section 171.
A vacuum line is connected to a socket 174 attached to the side of the monitor section 172. The filter section 171 and the monitor section 172 are partitioned by a base plate 175, but are communicated with each other by a connecting pipe 177 passing through the base plate 175. A monitor piece of wood 173 is removably fixed to the upper end of the connecting pipe 177 by a pressing member 178, and closes the upper end opening of the connecting pipe 177.

Therefore, the air that has entered the filter section 171 and the processing liquid 2
0, if it does not pass through this monitor member 173, the monitor section 17
I can't get out within 2.

The monitor unit 172 includes a monitoring window 176 at a position where the treatment liquid 20 that has passed through the monitor wood 173 drips,
0 has passed through the monitor wood 173 or not.

In addition, the monitor device 7 includes a pressure gauge 180 and a drain drain 18.
2 is a provision.

In the example shown in FIG. 5, there is a pair of monitor devices, but it is of course possible to use only one monitor device.

Then, at the same time, the processing liquid 20 compressed by the pressure nozzle 11 of the pressure vessel 1 is sent into the pressure vessel 1, and at the same time, the pressure reducing device 5
The processing liquid 20 in the pressure vessel 1 is sucked into the pressure vessel 1 at a lower pressure (approximately 60 Torr) through the process liquid draw-out pipe 12 on the lower side of the pressure vessel 1. This results in
Air adhering to the treatment liquid 20 and the surface of the wood 2 to be treated is sucked into the monitor device 170 via the treatment liquid conduits 13 and 14.

In this case, when the inside of the pressure vessel 1 is pressurized, the processing liquid 20 is on the low pressure side because the pressure is reduced.
It flows towards 70. At this time, the accumulated air in the treatment liquid 20 and the residual air in the wood to be treated 2 are lighter and have better fluidity, so the monitor wood 17 is
3, passes through the monitor wood 173, and connects to the connecting pipe 177.
It passes through into the monitor section 172.

As the pressurized injection further progresses, the flow of the processing liquid 20 into the monitor section 172 is observed through the monitoring window 176. At this point, it can be confirmed that the treatment liquid 20 has completely penetrated into the wood 2 to be treated mounted on the cart 3.

〔Effect of the invention〕

According to the present invention, with the above-described structure, even though the wood is immersed in the treatment liquid before the tank is depressurized, a good liquid injection effect can be obtained, and the number of treatment steps can be reduced.

In addition, since the inside of the tank is almost filled with the processing liquid, the space for depressurization is small (depressurization is easy, and the decompression device can be made smaller).

Furthermore, the treatment liquid in the tank does not leak out to the outside, such as the decompression device, due to depressurization, so the liquid level in the tank ultimately remains the same as it was at the beginning, and the wood to be treated is not exposed from the liquid level. A reliable injection process can be performed.

In addition, when sucking the liquid in the tank through a monitoring device, not only can you extract the air in the liquid or the air attached to the wood surface, but you can also visually check the status of liquid injection into the wood while the device is running. This has the effect that it can be confirmed by

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of an apparatus according to an embodiment of the present invention, and FIG.
FIG. 3 is a graph showing the capacity of the nozzle block of FIG. 2; FIG. 4 is a graph showing the vacuum pump pumping speed curve for calculating FIG. 3; FIG. 5 is a device configuration diagram showing another embodiment, and FIG. 6 is an enlarged sectional view of the monitor device. 1: Pressure vessel 3: Cart 6: Pressurizing device ts, i4: Processing liquid conduit 16: Gas-liquid separation container 2: Treated wood 4.5: Pressure reducing device 7: Valve 20: Processing liquid 25: Nozzle block 170: Monitor Device 171: Filter part 172: Monitor part 173: Monitor wood 176: Monitoring window

Claims (4)

[Claims] (1) A method of injecting a liquid such as resin liquid into wood in a tank whose interior can be depressurized or pressurized, and which consists of the following steps: a) Place the treated wood to be injected on a cart. Equipped with
Step b) Storing the truck in the tank and then filling the tank with the liquid; b) Vacuum suction of the air in the tank from the top of the tank to reduce the pressure in the tank, together with the air in the tank. c) Discharging the air present in the wood to be treated to the outside of the wood. c) In the middle of the vacuum suction line that vacuum-sucks the air in the tank from the top of the tank, the vacuum-sucked liquid and air are removed. step d) of separating the liquid, discharging only air to the outside, and circulating the liquid into the tank; d) After the completion of the depressurization, the liquid is introduced into the tank using a pressure pump to pressurize the tank; The liquid in the tank is released to atmospheric pressure via a valve, and the liquid is poured into the wood to be treated while exhausting residual air present in the liquid in the tank or on the surface of the wood to be treated to the outside of the tank. Inject step. (2) Instead of the step of releasing the liquid in the tank to atmospheric pressure via a valve, a vacuum suction line from inside the tank is provided separately from the vacuum suction line, and a vacuum suction line is provided from inside the tank that is the same as or similar to the wood to be treated. It is characterized by comprising the step of interposing a monitor wood having the following properties, sucking the inside of the tank by vacuum suction, and discharging air present in the liquid or on the surface of the wood to be treated to the outside of the tank. The method for injecting liquid into wood according to claim (1). (3) A device for injecting liquid such as resin liquid into wood,
A tank that has the following requirements: a) A tank whose interior can be depressurized or pressurized b) A trolley for carrying and storing the wood to be treated into which the liquid is to be injected into the tank c) Air in the tank d) Vacuum suction means for reducing the pressure inside the tank by vacuum suction, discharging the air in the tank to the outside of the tank, and discharging the air present in the wood to be treated to the outside of the wood.d) A vacuum suction line is provided at the top of the tank in the middle of the vacuum suction line that vacuum-suctions the air, and is connected to the tank side and the pressure reducing device side at the top, and connected to the tank at the bottom to collect the liquid and air that are vacuum-suctioned. A gas-liquid separation container in which the liquid is separated into gas and liquid, only the air is discharged to the outside by a pressure reducing device, and the liquid is circulated into the tank e) The liquid in the tank is opened to atmospheric pressure, and the liquid present in the liquid is or a valve for discharging air bubbles adhering to the surface of the treated wood to the outside of the tank. (4) Instead of the valve, a monitoring device is interposed in the middle of the vacuum suction line that sucks the inside of the tank, and the monitoring device is connected to a filter section connected to the decompression line and below the filter section. and a monitor section provided integrally, and the filter section is provided with a monitor wood having the same or similar properties as the wood connected to the decompression line,
Claim 3: The monitor unit is provided with a monitoring window at a position where the liquid that has passed through the monitor member drips, for visually observing whether or not the liquid has passed through the monitor member.
) A device for injecting liquid into wood.