JPH0688241B2 - Method and device for injecting liquid into wood - Google Patents

Description

TECHNICAL FIELD The present invention relates to a method and an apparatus for injecting a treatment liquid such as a resin into wood.

[Conventional technology]

Conventionally, various injection methods and devices of this kind are known, and various treatment liquids are injected into wood to make the wood flame-retardant, stabilize the dimensions, improve the strength, and prevent corrosion and insect repellency. The product value is enhanced by increasing the number of dyes and further expanding the applications by dyeing.

In these conventional methods and apparatuses, the wood to be treated is stored in an empty tank in advance, and the air in the tank is first vacuumed to reduce the pressure in the tank. After the pressure reduction process in the tank is completed, a treatment liquid such as a resin liquid is put in 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.

[Problems to be Solved by the Invention]

By the way, in the conventional method, the reason why the treatment liquid is put into the tank after depressurizing the treated wood is that if the treatment liquid is put into the tank from the beginning, the air in the timber will escape. Depending on the treatment liquid, it may adhere to the wood surface such as the ostium of the wood to be treated during decompression depending on the treatment liquid and block some of the holes necessary for the liquid to enter, resulting in a uniform treatment liquid injection state. This is because there is a case where you cannot get the information.

However, according to such a method, it is possible to increase the number of working steps as compared with the case where the wood and the treatment liquid are put in the tank from the beginning in order to put the treatment liquid while keeping the depressurized state in the tank. Of course, an extra control device, valves, etc. are required, and improvement has been desired.

[Means for Solving the Problems]

The method for injecting a liquid into wood according to the present invention is a method for injecting a liquid such as a resin liquid into wood in a tank whose inside can be 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 stored 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 existing in the treated wood together with the air in the tank is discharged to the outside of the wood.

The third step is to separate the vacuum-sucked liquid and air into a gas-liquid and discharge only the air to the outside in the middle of a vacuum suction line for vacuum-sucking the air in the tank from the upper part of the tank. Circulate into the tank.

In the final fourth step, after the pressure reduction is completed, the liquid is put into the tank by the pressure pump to pressurize the inside of the tank, and the valve is operated to change the pressure in the tank to the liquid inside the tank. Open to atmospheric pressure with a valve opening that does not drop sharply, and inject the liquid into the treated wood while discharging residual air present in the liquid in the tank or on the surface of the treated wood to the outside of the tank. To do.

Further, instead of the step of opening the liquid in the tank to the atmospheric pressure via a valve, a vacuum suction line from the inside of the tank is provided separately from the vacuum suction line, and the same or similar to the treated wood is provided in the middle thereof. A step of discharging air existing in the liquid or on the surface of the wood to be treated to the outside of the tank by interposing a monitor wood having a property, by vacuum suction in the tank, and providing the monitor device It is also possible to have a step of confirming completion of the injection process by visually observing the dropping of the liquid from the monitor wood through the monitoring window.

Further, a liquid injection device for wood according to the present invention is a device for injecting a liquid such as a resin liquid into wood, and a tank whose inside is depressurizable and pressurizable, and an object to be treated into which the liquid is injected. A trolley for loading wood into the tank, and vacuuming the air in the tank to reduce the pressure in the tank, discharging the air in the tank to the outside of the tank and existing in the wood to be treated. Is provided in the middle of the vacuum suction means for discharging the air to the outside of the wood and the vacuum suction line for vacuum sucking the air in the tank and at the upper part of the tank, and connected to the tank side and the pressure reducing device side at the upper part. And a gas-liquid separation container which is connected to the tank in the lower part and which separates the liquid and air sucked in vacuum into gas and liquid and discharges only air to the outside with a decompression device and circulates the liquid into the tank. Air bubbles existing in the liquid or adhering to the surface of the treated wood are released from the tank by opening the liquid in the tank to the atmospheric pressure at an opening that does not cause the pressure in the tank to drastically decrease. Equipped with a valve to discharge to.

Further, instead of the valve, a monitor device is interposed in the middle of a vacuum suction line for sucking the inside of the tank, and the monitor device is integrated with a filter part connected to the decompression line and below the filter part. The filter section is provided with a monitor wood having the same or similar properties as the wood connected to the decompression line, and the monitor section drips liquid passing through the monitor wood. A monitoring window for visually observing whether or not the liquid has passed through the monitor wood may be provided at the position.

The wood to which the present invention can be applied is not particularly limited, but for example, cedar, Akamatsu, Kuromatsu, Karamatsu, Ezomatsu, Todomatsu, Tsuga, fir tree,
Japanese coniferous trees such as cypress, sawara, tohi, ichii, and asunaro , Hardwood such as mahogany, apiton, agatis, teak, oak, rosewood and ebony.

Further, the shape of the material to be processed may be any shape that can be mounted in a container, and may be any shape of log, veneer, square and plate. The material to be treated is, of course, the above-mentioned lumber,
Processed wood such as plywood and laminated wood, particle board, and fiber board may be used.

Examples of the flame retardant treatment liquid include 2 ammonium hydrogen phosphate, inorganic water-soluble salts such as boric acid, sulfamate salts, halogen compounds, compounds containing phosphorus and nitrogen, guanidine compounds, and metals such as antimony oxide. Those containing a flame retardant such as an oxide can be adopted.

Examples of the treatment liquid for stabilizing the dimension include polyethers such as polyethylene glycol and polypropylene glycol, polyethylene glycol mono (meth) acrylate, saturated polyester resin, poly (meth) acrylic acid esters or copolymers thereof, and urethane. Resin, polyvinyl alcohol, paraffin, vinyl acetate copolymer, polyamide resin, polyimino resin, aminoplast resin,
Fluorine resin, silicone resin, vinyl copolymer resin, SB
A solution or dispersion of R, NBR, etc. can be used. As the treatment liquid for strengthening, for example, styrene, (meth) acrylate, vinyl acetate, diallyl phthalate, divinylbenzene, (meth) acrylic acid, acrylonitrile, a monomer represented by vinylidene chloride, an unsaturated polyester resin and a styrene monomer, A solution or dispersion of reactive polyurethane resin, phenol resin, alkyd resin, urea resin, melamine resin, vinyl ester, epoxy resin or the like can be used.

Examples of preservative treatment agents include copper compounds, chromium compounds, arsenic compounds, boron compounds, pentachlorophenol, naphthenic acid metal salts, organotin compounds, chlornaphthalene compounds, 8-quinolinol copper, captans, and creosote oil. A treatment liquid containing an antiseptic such as Wolman salt and chromized zinc chloride.

Examples of the treatment liquid for insect repellent include Wolman salt, polydene salt, organic phosphorus-based, carbamate-based, organotin compound, chlordane, heptachlor, dieldrin, aldrin, thiodane, γ-BHC (1,2,3,4,5. , 6-hexachlorocyclohexane), DDT [1,1,1-trichloro-2,2-bis (р-chlorophenyl) ethane], methoxychloro [1,
1,1-trichloro-2,2-bis (р-methoxyphenyl) ethane], toxaphene, kepon, sulfonamides, thiophene oil, organic thiocyanates, and other treatment agents containing insect repellents.

As a processing solution for staining, for example, chrysophenin G
Direct dyes such as X and Direct Brown M, acid dyes such as Suminol Fast Orange PO and Suminol First Brown R, basic dyes such as safranine and auramine, alcohol-soluble dyes, oil-soluble positive dyes,
If necessary, a solution or dispersion containing a dyeing aid and a surfactant and the like can be mentioned.

As a medium for producing these treatment liquids, for example,
Water, alcohols, glycols, aromatic hydrocarbons,
Aliphatic hydrocarbons, alicyclic hydrocarbons, ketones, esters, halogen compounds, acids, dioxane, tetrahydrofuran, DMF, DMSO and the like are used.

The viscosity of the treatment liquid used in the present invention is determined by the relationship with the properties of the treated wood, but a viscosity of 1,000 cps or less is generally preferred.

The depressurization treatment in the method of the present invention is preferably performed at an absolute pressure of 160 Torr or less. If the absolute pressure is higher than that, it may be difficult to efficiently remove the gas present in the treated wood.

Pressure treatment in the method of the present invention, a pressure of 1 to 50 kg / cm ^2, in particular carried out desirably at a pressure of 8~50kg / cm ^2. The higher the degree of pressurization, the better the injectability of the treatment liquid into the treated wood. However, it should be noted that it may be deformed depending on the applied pressure depending on the properties of the treated wood.

The monitor wood is for preferentially discharging the air existing in the treatment liquid or remaining on the surface of the treated wood out of the system.
Although it is mentioned above that it is provided to confirm the penetration of the treatment liquid into the wood, the mechanism is not clear.
It is presumed that the conduit holes in the monitor wood piece may play the role of a filter for separating low molecular weight substances such as air from high molecular weight substances. Of course, the wood piece is preferably a wood piece of the same type of wood as the wood to be treated, but any piece having similarities can be sufficiently adopted.

[Action]

First, the treated wood to be injected is mounted on a trolley, the trolley is stored in the tank, and the tank is filled with a liquid. Then, the air in the tank is sucked from the upper part of the tank by a vacuum suction means to reduce the pressure in the tank.
Then, the air existing in the treated wood together with the air in the tank is discharged to the outside of the wood.

Here, in the middle of a vacuum suction line for vacuum suctioning the air in the tank from the upper part of the tank, the vacuum suctioned liquid and air are separated into gas and liquid, and only air is discharged to the outside, and the liquid is circulated in the tank. And finally, when the inside of the tank is pressurized and the inside of the tank is opened to the atmospheric pressure through a valve, the air in the liquid in the tank or on the surface of the treated wood is discharged to the outside of the tank. At the same time, the liquid is injected into the treated wood.

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

〔Example〕

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

1 to 4 show an embodiment of the present invention. The liquid injection device for wood of this embodiment mainly comprises a pressure vessel 1 whose inside is depressurizable and pressurizable, and a treated object. A trolley 3 for mounting the wood 2, a decompression device 4 for decompressing the inside of the pressure container 1, a pressurizing device 6 for supplying compressed air to the decompression device 4, and a processing liquid 20 being pumped into the pressure container 1. Pressurizing device for
18, consisting of a gas-liquid separation container 16 and a valve 7.

The pressure vessel 1 is composed of a hollow cylindrical body 8 and a lid 9 which is attached to one end of the body 8 to be openable and closable, and is fixed to the foundation by legs. A depressurizing nozzle 10 and a pressurizing nozzle 11 are provided above the body 8. The decompression nozzle 10 includes the decompression device 4,
The pressure nozzle 11 is connected to the pressure device 18, respectively. Further, a processing liquid drawing-out pipe 12 is provided below the body 8.

A rail 15 for receiving the carriage 3 is provided in the pressure vessel 1.

A rail 30 is laid on the front side of the lid 9 of the pressure vessel 1. The trolley | bogie 3 can be accommodated in the pressure vessel 1 and taken out from the pressure vessel 1 by the trolley | bogie 31 which runs on this rail 30.

The trolley 3 carries the treated wood 2, and the treated wood 2 mounted on the inside of the trolley 3 can prevent the treated wood 2 from rising when the treatment liquid 20 is put into the pressure vessel 1. Is done. When the woods to be treated, particularly the timbers, are closely attached to each other and are mounted on the trolley 3, small pieces of wood, for example, between the woods 2 to be treated are provided so that the air escaped from the wood 2 to be treated can easily escape to above the pressure vessel 1. It is good to put in such a thing. However, in the case of logs, such processing is unnecessary. Also,
A treatment liquid withdrawing pipe 12 is provided below the pressure vessel 1.

The decompression device 4 vacuum-sucks the air in the pressure vessel 1 to discharge the air in the pressure vessel 1 to the outside to reduce the pressure in the pressure vessel 1 and to cover the air present in the treated wood 2. It is a vacuum suction means for discharging the treated wood 2 to the outside.

The decompression device 4 is for vacuuming the air in the pressure vessel 1 to reduce the pressure inside the pressure vessel 1, and is provided with a plurality of nozzle blocks 25 connected therein.

The nozzle block 25 has a block body 26 as shown in FIG.
The throat 31 is formed inside, and the front end opening 32 of this throat 31 is formed.
It is configured by attaching a nozzle 33 to the. Overall size is about 45 m / m
Is. The front end port 32 of the throat 31 expands in a divergent shape, and the diameter D on the outer end side is set to D = 1.5d with respect to the diameter d of the nozzle hole 33a of the nozzle 33, and the gap t (0.
5mm) apart to open. The rear end of the throat 31 is formed in a divergent shape like the front end and is connected to the discharge hole 34.
The base end of the nozzle 33 is screwed into an empty space 35 provided in the block body 26. Suction port 36 that opens inside this vacant chamber 35
Is connected to the intake hole 37.

In the nozzle 33, the outer shape of the base end part is a cylindrical part 38 from the tip to a slight length (about 0.3 mm), and a conical part that spreads from the base of the cylindrical part 38 (the length is about 2 mm in the axial direction). Has been formed. The nozzle block 25 shown in FIG.
33a is connected to the inflow 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 intake hole 37 is connected to the depressurizing nozzle 10 via a depressurizing tank in the depressurizing device.

FIG. 3 shows the test results of the depressurizing effect by the depressurizing device constructed by using the nozzle block 25. Decompression target is 9059
In a vacuum tank having a container of l, a is a vacuum degree-time curve when 10 nozzle blocks are connected in parallel, 40 in b, and 68 in c. In addition, the straight lines d to l shown as a comparative example are decompression degree-time straight lines by a vacuum pump manufactured by Sato Vacuum Machinery Co., Ltd. (Address: 1036 Fujikubo, Miyoshi-cho, Iruma-gun, Saitama). The straight lines d to 1 were calculated from the performance chart of FIG. In the figure, the numbers following SW and ST show the pumping speed (l / min), and the numbers following KS show 1/100 of the pumping speed (l / min).

When 68 nozzle blocks 25 are connected (curve c), a considerably stronger vacuum suction force can be exhibited as compared to a vacuum pump of similar price (shown by straight lines h and i in FIG. 3). Recognize. That is, by using this nozzle block 25, a vacuum suction force equivalent to that of an expensive vacuum pump can be obtained at low cost, and the price of the entire system can be reduced. Further, the vacuum pump generally requires regular maintenance in order to maintain its performance, but by using this nozzle block 25, so-called maintenance-free can be achieved. Further, since the number of connections of the nozzle block 25 can be freely adjusted, a desired vacuum suction force can be easily obtained, and the system configuration can be easily changed.

The force applying 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 device 18 is connected to the pressure nozzle 11 on the one hand and the reserve tank 19 for the processing liquid 20 on the other hand.

The gas-liquid separation container 16 is provided in the upper part of the pressure container 1 in the middle of a vacuum suction line 63 for vacuum suctioning the air in the pressure container 1. Further, the gas-liquid separation container 16 is connected to the decompression nozzle 10 on the pressure container 1 side at the upper part thereof, and is also connected to the decompression device 4 side. Therefore, the vacuum suction force of the decompression device 4 reaches the decompression nozzle 10 via the gas-liquid separation container 16 and sucks the air in the pressure container 1, but in this case, the processing liquid 20 is filled in the pressure container 1. , Because of the high level of the processing liquid 20,
The treatment liquid 20 foamed by the air emitted from the treated wood 2 is simultaneously sucked and guided to the gas-liquid separation container 16, where it is separated into air and the treatment liquid 20, and the treatment liquid 20 is stored in the gas-liquid separation container 16. To be done. Therefore, the treatment liquid 20 can be prevented from reaching the decompression device 4.

Furthermore, the gas-liquid separation container 16 is connected to the upper part of the pressure container 1 via the valve 17 at the lower part, and the degree of pressure reduction in the pressure container 1 reaches the upper limit, and the pressure reduction in the pressure container 1 and the gas-liquid separation container 16 is reduced. When the degree becomes the same, the processing liquid 20 accumulated in the gas-liquid separation container 16 returns to the pressure container 1 through the valve 17.

The valve 7 is a processing liquid withdrawal pipe 12 provided under the pressure vessel 1.
The processing liquid 20 in the pressure vessel 1 is connected to the pressure vessel 1.
Open to atmospheric pressure so that the internal pressure does not drop sharply.
When the valve 7 is opened, it exists in the processing liquid 20,
Alternatively, the bubbles adhering to the surface of the treated wood 2 are efficiently discharged to the outside of the pressure vessel 1 simultaneously with the liquid. In this case, the gas has a lower viscosity than the liquid, and when the valve 7 is opened, the gas tends to come out of the pressure container 1 more than the liquid. Therefore, the pressure in the pressure container 1 decreases due to the discharge of the liquid. It is possible to efficiently discharge the bubbles in the pressure container 1 to the outside of the pressure container 1 at the same time as the liquid while suppressing the above. The valve 7 is opened a little by a manual operation or is intermittently operated by using a solenoid valve to open. A discharge pipe 71 is connected to the valve 7, and the other end of the discharge pipe 71 faces the discharge tank 72.
The discharge tank 72 is connected to the reserve tank 19 and returns the processing liquid 20 to the reserve tank 19.

Next, the operation of this embodiment will be described.

First, an appropriate number of pieces of wood 2 to be processed are mounted on the carriage 3, and the wood 2 to be processed is fixed. And dolly 3 to dolly 31, rail
It is stored in the pressure vessel 1 using 15 and the lid 9 is closed. In that state, the processing liquid 20 is injected into the pressure vessel 1. Treatment liquid 20
After pouring, the pouring is performed until the treated wood 2 does not appear on the liquid surface.

Next, the pressurizing device 6 is operated and the depressurizing device 4 is operated, so that the depressurizing nozzle 10 on the upper part of the pressure container 1 causes the pressure container 1 to move 16 times.
Reduce the pressure below 0 Torr. After the inside of the pressure vessel 1 exhibits a desired reduced pressure state, the pressure reduction is continued for 10 to 120 minutes. Thereby, the air in the treated wood 2 is discharged to the outside. In this case, the vacuum suction force of the decompression device 4 reaches the decompression nozzle 10 via the gas-liquid separation container 16 and sucks the air in the pressure container 1, but in this case, the processing liquid 20 is filled in the pressure container 1. Since the liquid level of the treatment liquid 20 is high, the treatment liquid 20 foamed by the air discharged from the wood 2 to be treated is simultaneously sucked and guided to the gas-liquid separation container 16 where it is separated into air and the treatment liquid 20. The processing liquid 20 is stored in the gas-liquid separation container 16. Therefore, the treatment liquid 20 can be prevented from reaching the decompression device 4. Furthermore, when the pressure reduction degree in the pressure vessel 1 reaches the upper limit and the pressure reduction degree 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 becomes pressure. It returns to the inside of the container 1.

Next, the decompression nozzle 10 on the upper part of the pressure container 1 is closed, and the compressed processing liquid 20 having a pressure of 8 to 40 kg / cm ² is sent into the pressure container 1 by the pressure nozzle 11 on the upper side of the pressure container 1. Pressurization with the compressed processing liquid 20 is continued for about 10-120 minutes.

In this case, first of all, the pressure of the pressure vessel 1 is increased by further injecting the processing liquid 20 that should have already filled the pressure vessel 1 in the first place when moving from the depressurizing step to the pressurizing step. This is because the treatment liquid 20 enters the inside of the wood 2 to be treated to supplement the decrease. Secondly, the space inside the tank due to the decrease of the processing liquid 20 is filled with the processing liquid 20 so that the space is filled with the liquid, and further, the processing liquid 20 is pressurized and injected, so that the pressure vessel 1 is efficiently hydraulically pressurized. This is to apply pressure.

Then, together with the pressurization in the pressure vessel 1, the valve 7 is slightly opened by a manual operation or intermittently operated by using a solenoid valve to open the inside of the pressure vessel 1 to the atmospheric pressure, Air existing in the liquid in the container 1 or on the surface of the treated wood 2 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 inside the pressure vessel 1 does not drop sharply. The discharged processing liquid 20 is introduced into the discharge tank 72 via the discharge pipe 71. Further, the processing liquid 20 in the discharge tank 72 returns to the reserve tank 19 and circulates.

After that, the operation of each device is stopped, the pressure in the pressure vessel 1 is returned to normal pressure, the lid 9 is opened, and the carriage 3 is pulled out, so that the liquid-injected wood can be taken out.

When the liquid of the beech material was injected by the apparatus of this example, the injection rate of the treatment liquid was 115 to 129% by weight (average value 121% by weight). In the conventional method and apparatus, it is at most 70 to 80% by weight.

5 and 6 show another embodiment.

In this embodiment, instead of the valve 7 connected to the treatment liquid withdrawing pipe 12 in the above-mentioned embodiment, a pair of treatment liquid conduits 13 and 14 are connected to the treatment liquid withdrawing pipe 12, and the pair of treatment liquid conduits 13 and 14 are connected.
Are connected to the decompression device 5 with the monitoring devices 170, 170 interposed therebetween.

The decompression device 5 sucks the processing liquid 20 in the pressure container 1 by vacuum suction and discharges the bubbles existing in the processing liquid 20 or adhering to the surface of the treated wood 2 to the outside of the pressure container 1. Vacuum suction means.

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

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

The filter portion 171 is connected to the pipe of the treatment liquid conduit 13 (14) and has a property similar to or similar to that of the wood 2 to be treated.
3 is arranged.

The pipe of the liquid to be treated 13 (14) is connected to the upper part of the filter part 171 and is attached to the side surface of the monitor part 172 with a socket 174.
A decompression line is connected to. The filter part 171 and the monitor part 172 are partitioned by a base plate 175, but are connected by a connecting pipe 177 penetrating the base plate 175. A monitor wood 173 is held on the upper end of the connecting pipe 177 by a pressing member 178.
Is fixed so as to be removable, and the upper end opening of the connecting pipe 177 is closed. Therefore, the air and the treatment liquid 20 that have entered the filter unit 171 cannot escape into the monitor unit 172 without passing through the monitor member 173.

The monitor unit 172 is provided with a monitoring window 176 at a position where the treatment liquid 20 that has passed through the monitor wood 173 is dropped, and it is possible to visually check whether or not the treatment liquid 20 has passed through the monitor wood 173.

Further, the monitor device 7 is provided with a pressure gauge 180 and a drain 182.

In the illustrated example, the monitor device is a pair, but of course, only one monitor device is required.

Then, the processing liquid 20 compressed by the pressurizing nozzle 11 of the pressure container 1 is sent into the pressure container 1, and at the same time, the depressurizing device 5 is also operated so that the processing liquid drawing pipe 12 below the pressure container 1 causes the pressure container 1 to operate. The pressure of the processing liquid 20 in 1 is lower than that in the pressure vessel 1 (about 60
Aspirate by Torr). As a result, the air adhering to the treatment liquid 20 and the surface of the treated wood 2 is removed from the treatment liquid conduits 13, 14
Through the monitor device 170 side.

The reason why the vacuum suction is performed at the same time as the pressurization in the pressure vessel 1 is to direct the flow of the processing liquid 20 in the pressure vessel 1 and also to perform the air discharge quickly and efficiently. That is, when the inside of the pressure vessel 1 is pressurized, the treatment liquid 20 flows toward the low-pressure side monitor device 170 because the treatment liquid 20 is depressurized. At this time, since the accumulated air in the treatment liquid 20 and the residual air in the treated wood 2 are lighter and have better fluidity, they gather on the monitor wood 173 prior to the treatment liquid 20, pass through the monitor wood 173, and are connected. Monitor 172 through tube 177
It goes inward.

As the pressure injection further proceeds, the inflow of the processing liquid 20 into the monitor 172 is observed through the monitoring window 176. At this point, the treatment liquid 20 in the treated wood 2 loaded in the container 3
It can be confirmed that the penetration has been completed.

〔The invention's effect〕

According to the present invention, because of the configuration as described above, a good liquid injection effect can be obtained and the number of processing steps is reduced, even though the wood is immersed in the processing liquid before the depressurization processing of the tank.

Further, since the tank is almost filled with the processing liquid, the space for depressurizing is small, the depressurizing is easy, and the depressurizing device can be downsized.

Furthermore, there is no outflow of the processing liquid in the tank due to depressurization to the outside such as a decompression device, so the liquid level in the tank during depressurization does not change from the beginning, and the wood to be treated is not exposed from the liquid surface. A reliable injection process can be performed.

In addition, since the liquid in the tank is opened to the atmospheric pressure through the valve to the extent that the pressure in the tank does not drop sharply, for example, the treatment liquid injection rate for the beech wood that was conventionally 70 to 80% by weight There is also an effect that residual air existing in the liquid in the tank or on the surface of the wood to be treated can be efficiently discharged to the outside of the tank such as 115 to 129% by weight, and the treatment liquid injection rate can be further increased.

Also, since the liquid in the tank is sucked through the monitor device, the air in the liquid or the air adhering to the wood surface can be taken out, and the liquid injection status to the wood can be checked while the device is operating. The effect is that it can be visually confirmed.

[Brief description of drawings]

1 is an apparatus configuration diagram of an embodiment of the present invention, FIG. 2 is an enlarged cross-sectional view of a nozzle block of a decompression device, FIG. 3 is a graph showing the performance of the nozzle block of FIG. FIG. 5 is a graph showing a vacuum pump exhaust velocity curve for calculating FIG. 3, FIG. 5 is a device configuration diagram showing another embodiment, and FIG. 6 is an enlarged sectional view of a monitor device. 1: Pressure vessel, 2: Wood to be treated 3: Container, 4,5: Pressure reducing device 6: Pressurizing device, 7: Valve 13,14: Treatment liquid conduit 16: Gas-liquid separation container, 20: Treatment liquid 25: Nozzle Block 170: Monitor device, 171: Filter unit 172: Monitor unit, 173: Monitor wood 176: Monitoring window

Claims (4)

[Claims] 1. A method for injecting a liquid such as a resin liquid into wood in a tank whose inside can be depressurized and pressurized, comprising the following steps; a) The object to be injected on a trolley. Equipped with treated wood,
Storing the trolley in the tank, and then filling the tank with the liquid, b) depressurizing the inside of the tank by vacuum suction of the air in the tank from the upper part of the tank, and the air in the tank. Together with the step of discharging the air present in the treated wood to the outside of the wood, c) the vacuum sucked liquid and air in the middle of a vacuum suction line for vacuum sucking the air in the tank from the upper part of the tank Gas-liquid separation to discharge only air to the outside, and circulate the liquid in the tank, d) After the pressure reduction, the liquid is charged into the tank by a pressure pump to pressurize the tank. Along with the valve operation, the liquid in the tank is opened to the atmospheric pressure at a valve opening degree where the pressure in the tank does not drastically decrease, and the liquid in the tank or the treated tree is treated. The step of injecting the liquid into the treated in the wood residual air present in the surface of the while discharged outside the tank. 2. A vacuum suction line from the inside of the tank is provided separately from the vacuum suction line instead of the step of opening the liquid in the tank to the atmospheric pressure via a valve, and the same as the wood to be treated in the middle thereof. Or, a monitor device provided with monitor wood having similar properties is arranged, and the inside of the tank is sucked by vacuum suction through the monitor wood, and the residue present in the liquid in the tank or on the surface of the wood to be treated is retained. The step of injecting the liquid into the treated wood while discharging air out of the tank, and the injecting by visually observing the dripping of the liquid from the monitor wood through a monitoring window provided in the monitor device. The method for injecting a liquid into wood according to claim 1, further comprising the step of confirming the completion of the treatment. 3. A device for injecting a liquid such as a resin liquid into wood, which has the following requirements; a) a tank whose inside is depressurizable and pressurizable, and b) an object to be injected with the liquid. A trolley for loading treated wood into the tank, c) decompressing the air in the tank by vacuum suctioning the air in the tank, discharging the air in the tank to the outside of the tank, and the wood to be treated. Vacuum suction means for discharging the air present inside the wood to the outside of the wood, d) provided in the upper part of the tank in the middle of the vacuum suction line for vacuum sucking the air in the tank, and at the upper part, on the tank side and It is connected to the pressure reducing device side, and is connected to the tank at its lower part, and the liquid and air that have been vacuum sucked are separated into gas and liquid, and only the air is discharged to the outside by the pressure reducing device and the liquid is circulated into the tank. A) a gas-liquid separation container, e) by opening the liquid in the tank to atmospheric pressure at an opening such that the pressure in the tank does not drop rapidly, so that the liquid present in the liquid or on the surface of the treated wood is A valve for discharging the adhered bubbles to the outside of the tank is provided. 4. A monitor device is provided in the middle of a vacuum suction line for sucking the inside of the tank instead of the valve, and the monitor device includes a filter portion connected to the decompression line, and a filter portion of the filter portion. And a monitor unit integrally provided below, the filter unit is provided with the decompression line connected to a monitor wood having the same or similar properties as the wood, and the monitor unit is provided with the liquid passing through the monitor wood. The liquid injection device for wood according to claim (3), wherein a monitoring window for visually observing whether or not the liquid has passed through the monitor wood is provided at a dropping position.