JP2009045914A - Piping structure and peripheral equipment for sending resin or agent - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide the structure of an apparatus for conveying a resin or an agent by using no liquid force-feed pump by pressure reducing or pressurizing between a stock tank and a tank for working to deliver a main liquid, in an apparatus for impregnating and injecting the resin or the medicine into wood, and a piping structure for cleaning the force-feed pump used at the time of pressurizing and the peripheral piping, and an apparatus including them. <P>SOLUTION: A bypass piping is conducted at the main liquid sending piping, and the liquid sending of the main piping is moved without power by using a pressure difference from the atmospheric pressure applied to a stock tank 1 within a working tank by using a vacuum tank and a compressor. When the working tank is filled up with the liquid and is pressurized, the working tank is pressurized by a force-feed pump 3 installed on a bypass piping. The cleaning work is conducted by closing the cocks B1, B2 of the main piping , stopping the inflow of the resin or the medicine, injecting the cleaning liquid from the cleaning piping, operating the force feed pump 3 at the bypass piping as a center, and circulating the cleaning liquid. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  In the present invention, when a resin to which a curing agent is added is moved from a stock tank to a working tank, a feed pump for feeding liquid is generally used. The resin or the chemical solution has been moved by feeding through a gear structure or cam structure which is a feeding device in the liquid feed pump and moving the inside of the pipe.

  At this time, heat generated by friction of the liquid feed pump and motor heat are trapped in the feed pump and transferred to the piping. However, many resins are hardened by adding a curing agent, and even one-component materials are susceptible to thermal changes, and even when placed in chemicals, changes in material are likely to occur by heating. In addition, the gear structure or cam structure, which is a feeding device, often causes resin or chemicals to be excessively agitated and deteriorated.

  In order to avoid this, a vacuum pump or a compressor is attached to the work tank, and the work tank is depressurized or air-pressurized to create a difference in atmospheric pressure with the stock tank. A method is provided in which a resin or a drug is moved through a pipe using the disparity.

  When the resin that has moved in the pipe is pressurized in the work tank, a compressor is attached to the work tank and air is pressurized, or the liquid is fed by a pressure liquid feed pump and pressurized by liquid pressure. Further, air pressurization by a compressor and hydraulic pressure by a pressure liquid feed pump may be used in combination.

  In the normal piping circuit, the liquid feed pump is attached to the feed-side pipe. Therefore, the piping of the injection pipe and the return pipe that returns the remaining liquid to the stock tank is necessary, mainly for the liquid feed pump. It is common. In addition, the feed pump requires a large amount of liquid feed and a large liquid feed pump.

  Because it is a large liquid feed pump, friction and motor heat are generated inside and outside the pump, and heat is applied to the liquid to be transferred. If it contains a curing agent, start of curing, It was the cause of alteration.

  In order to avoid this, by performing bypass piping on the main piping as shown in [Drawing 1], resin or chemicals is caused by the pressure difference between the stock tank and the working tank through the main piping and into the working tank. Can be moved in large quantities without using a liquid feed pump.

  When liquid pressure is required in the work tank, conventionally, a large-volume liquid feed pump has to be increased in liquid feed amount, or a pressure liquid feed pump having a structure with high pressure resistance is required. Therefore, the overall equipment cost has been soaring.

  In order to avoid this, as shown in [Drawing 1] and [Drawing 2], a main pipe for feeding liquid and a bypass pipe having a pressure liquid feeding pump for feeding a resin or a chemical necessary for pressurization are installed. . Thus, a large amount of resin or chemical can be moved using the main pipe due to the difference in atmospheric pressure.

  Only a small amount of resin or chemical solution necessary for pressurization is sent into the work tank by the pressure liquid feed pump installed in the bypass. Accordingly, the bypass pipes of [Drawing 1] and [Drawing 2] can be made thin, and the pressure liquid feed pump is used only when the pressurization is required. In addition, the bypass pipe portion is small and can be attached to an arbitrary place of the main pipe.

  Moreover, by attaching the cock of [Drawing 1] and [Drawing 2], it becomes easy to inject the cleaning liquid into the pipe, and by operating the pressure liquid feed pump, the pipe is cleaned and the pressure liquid feed pump is cleaned. Can be performed simultaneously. As a result, no residue remains in the pump or piping, and the inside of the pump can always be cleaned, and only the cleaning liquid can be discharged. Therefore, the cleaning liquid can be mixed into the resin or chemical liquid. Since there is no more appropriate cleaning solution can be selected.

  In addition, when the bypass pipe is directly connected to the discharge pipe at the lower part of the work tank as shown in [Drawing 2], the inside of the work tank can be easily cleaned.

  Wood has the disadvantages that it is easy to rot and burn, and there is a demand for insect protection and non-combustion of wood.

  However, pressure tanks and peripheral equipment for decompression and pressurization are well-known techniques, but curing is promoted by adding a curing agent to the resin to be impregnated and applying heat generated by the liquid feed pump. During the pressure injection, the resin hardens in the work tank, or the resin hardens during storage in the stock tank, so that it is difficult to inject the resin.

  In addition, the gear structure or cam structure, which is the feed structure of the liquid feed pump, is over-stirred and the resin or chemical is altered.

  When incombustible by impregnating and injecting incombustible materials into the wood using a decompression and pressure method, the chemicals used are often inorganic, and the gear structure inside the liquid feed pump and cams by sliding are used. It is known that the friction and wear of the structure are promoted, gaps are generated in the gears and cams, and their functions are lowered.

  As described above, the installation location of the conventional piping equipment and the liquid feed pump is installed from the main piping to the bypass piping, thereby reducing the equipment cost.

  In addition, by reducing the size of the pressure liquid feed pump, maintenance of the pump is facilitated.

  It facilitates cleaning work in the piping, pressure fluid feed pump and work tank, and makes maintenance easier.

  In the present invention, except for the conventional technical drawbacks, the piping structure shown in [Drawing 1] and [Drawing 2] is used. After lowering the atmospheric pressure from the atmospheric pressure, the B1, B2, and B3 cocks are opened and the other cocks are closed, so that the main piping is opened and the resin or the chemical is moved.

  [Drawing 1] By making the piping structure of [Drawing 2], by closing the cocks of B3, B6 and B7 and opening the other cocks, the bypass pipes function and the pressure pump is operated, Fluid pressure can be applied in the work tank.

  [Drawing 1] By using the piping structure of [Drawing 2], the cock operation of the previous [0021] is performed, and the air pressure is increased by a compressor or the like in the work tank, so that the resin or chemical solution is put in the stock tank. Move backward.

  [Drawing 1] By making the piping structure of [Drawing 2], the cocks B1, B2, are closed, the other cocks are opened, and the residual resin or chemical in the pipe is discharged from the cock of B7. At this time, the resin or medicine in the inflow side pipe is discharged by rotating the pressure liquid feed pump for a short time.

    Further, the pipes B1 to B2 can be cleaned by closing B7, opening B6, injecting the cleaning liquid from B6, and operating the pressure pump. After cleaning, B7 is opened and the cleaning liquid is discharged. In the piping structure of [Drawing 2], the cleaning liquid can be injected into the work tank and cleaned at the same time.

    As a result, the inside of the pipe is always cleaned, and the resin and chemicals can be prevented from remaining in the pressure liquid feed pump, and maintenance can be facilitated.

    As a result of carrying out bypass piping and carrying out continuous operation tests, no maintenance is required for 5 years.

The figure which shows the structure of the bypass piping by this invention The figure which shows the structure of the bypass piping which can also wash | clean the bottom part of the working tank by this invention

Explanation of symbols

1. Stock tank (resin or chemical storage tank)
2. Work tank (pressure vessel for injecting and injecting wood with resin or chemicals)
3. 3. Pressure fluid feed pump 4. Cleaning liquid inlet Resin or chemical and cleaning liquid outlet [Fig. 1] In the piping, cock position B1, B2, B3, B4, B5, B6, B7,
[Fig. 2] cock position B1, B2, B3, B4, B6, B7, B8,

Claims (3)

  Piping structure and equipment that can be easily cleaned so that resin or chemicals do not remain in the piping when the resin or chemicals are impregnated and injected into wood using the reduced pressure method   Piping structure and equipment for easily washing and discharging residual liquid remaining in pipes and work tanks when resin or chemicals are impregnated and injected into wood using the reduced pressure method   A method of moving a resin or chemical by moving the inside of the work tank under vacuum or air pressure without using a feed pump when moving the resin or chemical from the stock tank to the working tank.

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