JPH0396301A - Method and device for impregnating liquid into lumber - Google Patents

Abstract

PURPOSE:To obtain a favorable liquid impregnation effect, by a method wherein vapor-liquid separation of a vacuum-sucked liquid and air is performed, only the air is discharged outside in the middle of a vacuum-suction line vacuum-sucking the air in a tank through the upper part of the tank and the liquid is circulated within the tank. CONSTITUTION:Vacuum suction force with a decompression device 4 arrives at a decompression nozzle 10 through a vapor-liquid separation vessel 16 and sucks air in a pressure vessel. In this instance, since a treatment liquid 2 is filled into a pressure vessel 1 and a liquid level of the treatment liquid 20 is high, the formed treatment liquid 20 is sucked at the same time with air comes out of lumber 2 to be treated and led to the vapor-liquid separation vessel 16. Then the same is separated into the air and treatment liquid 20 and the treatment liquid 20 is held into the vapor-liquid separation vessel 16. Therefore, the treatment liquid can be prevented from arriving at the decompression device 4. When a degree of the inside of the pressure vessel 1 arrives at the upper limit and the degree of decompression of the pressure vessel becomes identical with that of the inside of the vapor-liquid separation vessel 16 further, the treatment liquid 20 accumulated within the vapor-liquid separation vessel 16 is returned to the inside of 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 resin into wood. [Prior Art] Various injection methods and devices of this type have been known in the past. Various treatment liquids are injected into wood to make it flame retardant, stabilize its dimensions, improve its strength, and provide corrosion protection. By increasing its properties and insect repellency, and expanding its uses by dyeing it,
It increases the product value. 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 depressurization process in the tank is completed, process liquid such as resin liquid is poured into the tank while maintaining the depressurized state. Finally, 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 treatment liquid is put into the tank after the wood to be treated is treated under reduced pressure is that the treatment liquid is put in the tank from the beginning. This is because the air in the wood is difficult to escape and takes a long time to process.During depressurization, some treatment liquids may adhere to the wood surface such as the butt end of the wood to be treated and partially block the openings necessary for the liquid to penetrate. This was because it sometimes became impossible to obtain a uniform injection state of the processing liquid. However, according to this method, the processing process is added while maintaining the reduced pressure inside the tank, so compared to placing the wood and processing liquid in the tank from the beginning, the number of work steps is increased. Of course, additional control devices and valves were required, and improvements were desired. [Means for Solving the Problems] The method of injecting liquid into wood powder according to the present invention is a method of injecting liquid such as resin liquid into wood in a tank whose interior can be depressurized and pressurized freely, and includes the following method. It consists of steps. In the first step, the treated wood to be injected is placed on a truck, the truck is placed in the tank, and the tank is then 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 to discharge 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 monitor device is interposed in the middle of the vacuum suction line that sucks the inside of the tank, and the monitor device is integrated with a filter section connected to the decompression line and below the filter section. The filter part is provided with a monitor wood having the same or similar properties as the wood connected to the decompression line, and the monitor part is located at a position where the liquid that has passed through the monitor member drips. The monitor may be provided with a monitoring window for visually checking whether the liquid has passed through the monitor member. 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, sawara, spruce, ichii, and asunaro, makanba, beech, zelkova, oak, maple, oak, elm, zen, oak, nara, shinoki, cherry tree, horse chestnut, paulownia, katsura, lauan Examples include hardwoods such as , mahogania, agathis, teak, oak, rosewood, and ebony. Further, 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, a veneer, a square timber, or a board. The materials to be treated include sawnwood as mentioned above, as well as
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, SB
R. A solution or dispersion of NBR etc. can be used. Treatment liquids for strengthening include, for example, styrene, (meth)acrylate, vinyl acetate, diallyl phthalate,
Monomers represented by divinylbenzene, (meth)acrylic acid, acrylonitrile, vinylidene chloride, unsaturated polyester resins and styrene monomers, reactive polyurethane resins, phenolic resins, alkyd resins, urea resins, melamine resins, vinyl esters, epoxy resins, etc. Solutions or dispersions 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-quinolinol steel, cabtans, creonut 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, bolidene salt, organophosphorus, carbamate, organotin compounds, chlordane, hebutachlor, deirdrin, aldrin, chidan, γ-BHC (1,2,3,4 ,5.6
-hexachlorocyclohexane). DDT[1,l
, 1-trichloro-2,2-bis(p-chlorophenyl)ethane], methoxychlor[1,1.1-trichloro-2,2-bis(p-methoxyphenyl)ethane],
Treatment agents include insect repellents such as toxaphene, kebone, sulfonamides, thiophene oil, and organic thiocyanates. 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, and oil-soluble positive dyes are used 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 1,000 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 being treated. The pressure treatment in the method of the present invention is preferably carried out at a pressure of 1 to 50 Kg/crn' (7), particularly 8 to 50 Kg/crrr. The liquid can be injected easily into the treated wood. However, depending on the properties of the treated wood, it may be deformed by the pressure applied, so care must be taken. In order to preferentially discharge air remaining on the surface of the
As mentioned above, it is designed to confirm the penetration of the treatment liquid into the wood, but the mechanism of penetration 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. [Operation] 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 up from the top 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 vacuums 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 back 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 is true when a monitor is used instead of a valve; in this case, once most of the air in the tank has been exhausted to the outside of the system, the injected liquid passes through the monitor wood and is connected to the monitor of the monitor device. It begins to drip into the room. Since the monitor wood and the treated wood have the same or similar properties, if this dripping can be seen through the monitoring window of the monitor, it can be confirmed that the treatment liquid has sufficiently penetrated into the treated powder material in the tank. [Example] Hereinafter, an example of the present invention will be described based on the drawings.

Figures 1 to 4 show an embodiment of the present invention, and the apparatus for injecting liquid into wood according to this embodiment mainly consists of a pressure vessel 1 whose inside can be freely pressurized and depressurized, and a pressure vessel 1 to be treated. A cart 3 for loading the powder material 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 M for pressure-feeding the processing liquid 20 into the pressure vessel L
18, a gas-liquid separation container 16, and a valve 7. The pressure vessel 1 consists of a hollow cylindrical body 8 and an M9 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 reduction nozzle 10 and a pressure nozzle 11 are installed in the upper part of the shell 8.
is provided. 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.
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 1. A rail 30 is installed on the front side of the lid 9 of the pressure vessel 1. The trolley 3 can be stored in and taken out from the pressure vessel l by means of a trolley 3l running on the rails 30. The trolley 3 carries the water material 2 to be treated.
It is designed 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 It is a good idea to sandwich a piece of wood, etc.
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 l. 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 the block body 26 and attaching a nozzle 33 to the front end opening 32 of the throat 31. The overall dimensions are approximately 45m/■. The front end port 32 of the throat 31 expands toward the end, and the diameter D on the outer end side is set to the nozzle 3.
D=1.5d for the nozzle hole 33a diameter d of No. 3,
It opens with a gap t (approximately 0.5 mg) in between and the tip of the nozzle 33. 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 base end with a cylindrical part 38 extending from the tip to a slight length (approximately 0.3 mi).
A conical part that spreads out from the base of 8 (length 2 in the axial direction)
0) is formed. Nozzle block 25 in Fig. 2
In this case, the nozzle hole 33a is connected to the compressed air inflow hole 39. 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 decompression nozzle IO via a decompression tank in the decompression device. Figure 3 shows the test results of the pressure reduction effect of a pressure reduction device constructed using this nozzle block 25. Targets for decompression are 9
In a vacuum tank having a container of 059 fL, 10 nozzle blocks (a), 40 nozzle blocks (b), and 68 nozzle blocks (C) are connected in parallel in the figure. In addition, the straight line d-sentence shown as a comparative example is a one-hour line of decompression degree using a vacuum bomb manufactured by Sato Vacuum Machinery Co., Ltd. (address: 1036 Fujikubo, Miyoshi-cho, Iruma-gun, Saitama Prefecture). This straight line d-sentence is the fourth
Calculated from the performance diagram shown in the figure. In the figure, the numbers following sw and sT indicate the exhaust speed (text/win), and the numbers following KS indicate the exhaust speed (fL/win) of 171 0 0. 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 similar price (the one shown in Fig. 3, center line & 1h, 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. Additionally, vacuum bombs generally require regular maintenance to maintain their performance, but if this nozzle block 25 is used, they 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 varied.

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 pressurizing device 18 is connected to the pressurizing nozzle 1l on one side and the reserve tank 19 for the processing liquid 20 on the other side. The gas-liquid separation vessel 16 is provided at the upper part of the pressure vessel 1 in the middle of a vacuum suction line 63 that vacuum-suctions the air inside the pressure vessel 1. Further, the gas-liquid separation vessels 16 are connected at their upper portions to the pressure reducing nozzle 10 on the pressure vessel 1 side, and are also connected to the pressure reducing 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 l6. Therefore, the processing liquid 20 can be prevented from reaching the pressure reducing device 4. Furthermore, the lower part of the gas-liquid separation vessel 16 is connected to the upper part of the pressure vessel 1 via a valve 17, and when the degree of pressure reduction in the pressure vessel 1 reaches its upper limit, the pressure in the pressure vessel 1 and the gas-liquid separation vessel 16 is reduced. When the temperature becomes the same, the processing liquid 20 accumulated in the gas-liquid separation vessel l6 passes through the valve 17 and returns to the pressure vessel l. The valve 7 is connected to a treatment liquid draw-out pipe l2 provided at the lower part of the pressure vessel 1, and releases the treatment liquid 20 in the pressure vessel 1 to the atmosphere, and removes any water present in the treatment liquid 20 or the water material to be treated. Air bubbles adhering to the surface of pressure vessel 2 are discharged to the outside of 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 7l 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 a reserve tank l9.
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 treated water materials 2 are mounted on the trolley 3, and the treated materials 2 are fixed. Then, the trolley 3 is moved to the trolley 31. Store it in the pressure vessel 1 using the rail 15 and close the lid 9. In this state, the processing liquid 20 is injected into the pressure vessel 1. After injection, the treatment liquid 20 is poured until the water material 2 to be treated does not come out above the liquid surface. 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 using the pressure reducing nozzle 10 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, further lO~12
Continue decompression for 0 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. Since the liquid level of the treatment liquid 20 is high, the treatment liquid 20 foamed by the air coming out of the water material 2 to be treated is simultaneously sucked in and led to the gas-liquid separation container 16, where it is separated into air and treatment liquid 20. The processing liquid 20 is then stored in a gas-liquid separation container l6. For this reason, the processing liquid 20
It is possible to prevent this 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 flows into the pressure vessel 1. I will go back inside. Next, the pressure reduction nozzle 10 at the top of the pressure vessel 1 is closed, and the pressure is increased to 8 to 40
A compressed treatment liquid 20 of Kg/cm' is sent into the pressure vessel 1. The pressurization by this compressed processing liquid 20 is approximately 10-
Continue for 120 minutes. Then, along with the pressurization inside this pressure vessel 1. By opening the valve 7 slightly manually or by opening it intermittently using a solenoid valve, the inside of the pressure vessel 1 is opened to atmospheric pressure, and the inside of the pressure vessel 1 is opened to atmospheric pressure. The air present on the surface of treated wood 2 is discharged outside the pressure vessel. 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. Discharged processing liquid 20
is led into the discharge tank 72 via the discharge pipe 7l. Further, the processing liquid 20 in the discharge tank 72 returns to the reserve tank 19 and circulates therein.

Thereafter, after stopping the operation of each device and returning the pressure inside the pressure vessel l to normal pressure, the lid 9 is opened and the cart 3 is pulled out, allowing the liquid-injected wood to 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). With conventional methods and equipment, the amount is at most 70 to 80% by weight. 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 pressure reducing device 5. The pressure reducing device 5 removes the processing liquid 20 in the pressure vessel 1 by vacuum suction.
This is a vacuum suction means for discharging air bubbles present in the treatment liquid 2o or attached to the surface of the wood 2 to be treated to the outside of the pressure vessel 1. The monitor device 170 consists of a filter section I71 connected to the processing liquid conduit 13 (14), and a monitor section 172 integrally attached below the filter section 171. Figure 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 decompression line is connected to a socket 174 attached to the side of the monitor section 172. The filter section 171, the monitor section 172, and the base plate 175 are partitioned from each other, but they 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.
For this reason, the air that has entered the filter section l7l, 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 M7 has a pressure gauge 18.
0, a drain 182 is provided. In the illustrated example, there is a pair of monitor devices, but of course only one monitor device is required. 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 reduction device M5
The processing liquid 20 inside the pressure vessel 1 is sucked through the processing liquid draw-out pipe 12 on the lower side of the pressure vessel 1 at a pressure lower than that inside the pressure vessel 1 (approximately 60 Torr). As a result, air adhering to the treatment liquid 20 and the surface of the wood 2 to be treated is removed from the treatment liquid conduit 13. 14 to the monitor device 170 side. 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 2 to be treated are lighter and have better fluidity, so the air accumulated in the treatment liquid 20 and the air remaining in the wood 2 to be treated are transferred to the monitor wood 17 before the treatment liquid 20.
3, passes through the monitor wood 173, and connects to the connecting pipe 177.
It escapes into the monitor section 172 through. As the pressurized injection further progresses, the processing liquid 2 flows into the monitor section 172.
0 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 loaded in the container 3. [Effects of the Invention] According to the present invention, with the above-described structure, a good liquid injection effect can be obtained even though the wood is immersed in the treatment liquid before the tank is depressurized, and the treatment process can be simplified. little.

In addition, since the tank is mostly filled with the processing liquid, the space for depressurization is small, making it easy to depressurize, and the decompression device can be made smaller. Furthermore, the process liquid in the tank does not leak out to the outside, such as the pressure reducing device, due to depressurization, so the liquid level in the tank ends up being the same as it was at the time of depressurization, and the powder material to be processed is not exposed from the liquid level. , a reliable injection process can be performed. In addition, since the liquid in the tank is sucked through a monitoring device, it is possible to extract the air in the liquid or the air attached to the wood surface, and the status of liquid injection into the wood can be monitored while the device is running. This has the effect of being able to be confirmed visually.

[Brief explanation of drawings]

FIG. 1 is an apparatus configuration diagram of an embodiment of the present invention, and FIG. 2 is a
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 an apparatus configuration diagram showing another embodiment, and FIG. 6 is an enlarged cross-sectional view of the mokoyu apparatus. 1: Pressure vessel 2: Wood to be treated 3: Container 4, 5: Pressure reducing device 6: Pressurizing device
7: Valve 13, 14: Processing liquid conduit 16: Gas-liquid separation container 20: Processing liquid 25: Nozzle block 170: Monitor device 171: Filter section 172: Monitor section 173: Monitor wood 176: Monitoring window Fig. 2

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
a step of storing the trolley in the tank and then filling the tank with the liquid; b) vacuum suctioning the air in the tank from the top of the tank to reduce the pressure 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 a vacuum suction line that vacuum-sucks the air in the tank from the top of the tank, the vacuum-sucked liquid and air are d) After the completion of the decompression, the liquid is introduced into the tank by a pressure pump to pressurize the tank. At the same time, the liquid in the tank is opened to atmospheric pressure via a valve, and the residual air present in the liquid in the tank or on the surface of the wood to be treated is discharged to the outside of the tank. Step of injecting the above liquid. (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,
Consisting of the following requirements: a) A tank whose interior can be depressurized or pressurized, b) A trolley for loading and storing the treated wood to be injected with the above-mentioned liquid, and c) Inside the above-mentioned tank. d) Vacuum suction means for reducing the pressure inside the tank by vacuum suctioning the air, 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 installed at the top of the tank in the middle of the vacuum suction line that vacuums the air in the tank, 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 vacuum the air. A gas-liquid separation container that separates the liquid and air, discharges only the air to the outside using a pressure reducing device, and circulates the liquid into the tank; e) The liquid in the tank is released to atmospheric pressure, and the A valve is provided to discharge air bubbles existing in the liquid or attached to the surface of the wood to be treated 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.