SU1411255A1 - Method and apparatus for rafting a timber-floating raft on water - Google Patents

Abstract

FIELD: forest industry. The purpose of the invention is to increase the buoyancy and quality of the beam being formed. The device contains a rigid shell 1, inside of which there is an elastic chamber 2, - equipped with a suction pipe 3, equipped with a check valve with a xgpus device in the form of a water-soluble membrane. 1 hp ft-ly, 1 sec f-ly, 8 ill.

Description

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The invention relates to the forest industry, and more specifically to the ravine forest lumber, which does not possess sufficient physical buoyancy in its physical properties and can be used on water raids for rafting wood beams with artificial float., 1 Purpose of the invention - to increase buoyancy and the quality of the formed beam.

.- FIG. 1 depicts), a sub-melt with a rigid outer shell; in FIG. 2, node I in FIG. The view from the end of the subsurface in FIG. the collector corridor of the rafting machine installed in the log of the log; figure 4 is a sub-melt filled with water, inside a wood beam; Fig. 5 - the same, inside the wood beam after the water has been displaced from the sub-melt by air; 6 is the same with an elastic airtight outer shell; FIG. 7 shows a two-chamber sub-melt with a flexible, air-permeable shell; on Fig - subdivision with a longitudinal elastic bulkhead with a breathable elastic outer sheath. I Structurally, the device rafts {timber-alloy beam can perform- | s as follows. I 1. The outer shell of the hermetic vessel is rigid, undeformable and airtight (for example, t is a pipe made of metal or a plate with hermetically closed ends)

An elastic chamber 2 is placed in the rigid shell 1, equipped with a suction pipe 3, the outer end of which is placed on the outer surface of the iHOCTb shell 1. The suction pipe 3 is equipped with a check valve 4 with a release device in the form of a water- soluble membrane,

A check valve with a trigger device is presented in figure 2. Inside the housing 5 there is a movable sleeve 6 in which a membrane 7 is inserted, made of a water-soluble material. The thickness of the membrane is chosen from the rate of its dissolution in 15-20 minutes. When water pressure is applied, the sleeve 6 rests on the support 8, opening access to the pumped water into chamber 2. When a back pressure occurs (at the time of stopping the water injection), the hypogea 6 presses against the elastic washer 9, blocking the access of water

from chamber 2 outwards. At the inlet nozzle of the housing 5, the tides 10 are filled in so that the logs in the bundle are not pressed close to the nozzle. After dissolving the membrane 7, regardless of the position of the sleeve 6, water from chamber 2 is opened to the environment (to the water). To install the membrane 7, the housing 5 and the sleeve 6 are collapsible.

The beam raft and change in density of the device for fusion are carried out as follows.

The outer shell 1 and the elastic chamber 2 divide the internal cavity of the submelt into two compartments 11 and 12 that are isolated from each other. Due to the elasticity of chamber 2, compartments 11 and 12 can change their volume. The float is placed in the brush of the logs 13 (FIG. 3). Since air is in compartments 11 and 12, almost the entire submelting is above the water horizon. From the water pump, water is supplied to the housing 5 under pressure, under the influence of which the movable sleeve 6 rests on the support 8 and opens water to the chamber 2, which expands: :: and the compartment 12 increases its volume as water enters. Accordingly, the volume of air in compartment 11 decreases, and since the air mass remains unchanged, its pressure increases in proportion to the decrease in volume of compartment 11. Naturally, the density of the sub-base (device) increases, and its sediment increases proportionally. When the subflow reaches the required density (i.e., the density equal to the average density of the logs 13 in the brush), the flow of water into the compartment 12 stops and the back pressure equal to the pressure of the compressed air. In the air compartment 11, the sleeve 6 presses against the rubber washer 9, blocking the water outlet from chamber 2 outwards. Then the log brush is compressed along with the sub-melt between the racks of the rafting machine. Due to the density separation of the logs by compression with their racks (i, e, low density logs are pushed into the upper part of the beam being formed, high density logs are concentrated in the lower part of the beam) capacity -float having a density equal to the average density of the logs in the brush is located in the middle part of the beam. After squeeze

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A timber bunch is formed from the bristle of the logs, beam bundles 14 are placed on it and the finished bundle is pulled out of the rafting machine to clean water. The location of the sub-alloy in the beam during this period is shown in FIG. 4.

. After a certain time, controlled by the thickness of the membrane 7, the membrane dissolves in the water and opens the way for the water from chamber 2 to the environment (into the reservoir). Since water is incompressible, the pressure of water in the compartment 12. instantly drops to the magnitude of the hydrostatic pressure in the reservoir at the level of the location of the inlet nozzle -. ka housing 5 from the water horizon. Under the pressure of air compressed in compartment 11, water is displaced from chamber 2, the volume of compartment 11 increases, and compartment 12 decreases to the volume corresponding to the external hydrostatic pressure. The inlet pipe of the submelt can be located at a distance of 0.3 - 1, Um from the water horizon, which is determined not only by the depth of the basement, but also by the position of the submersible intake pipe relative to the water level. Fig. 5 shows a sub-melt, the intake pipe of which is parallel to the water horizon, t, e, the sub-melt is rotated by 90 relative to the sub-melt in Fig. 4, the hydrostatic pressure at the indicated depths will be 0.03 -. 0.11 MPa, therefore, the residual volume of water in compartment 12 will be 3-11% of the internal volume of the envelope. This residual volume of water has practically no effect on the buoyancy of the subsurface. During the wave towing period, under wave action, the residual volume of water in chamber 2 will oscillate in the indicated interval depending on the position of the beam relative to the wave at each moment in time. Thus, after the dissolution of the membrane 7, the submelt practically restores its original density, i.e. density before pumping water into compartment 12,

2, The outer shell of the hermetic tank is elastic and airtight, for example, from a reinforced rubber plate.

(figob).

In the elastic sheath 15 is placed an elastic chamber 2, equipped with a check valve 4 with a trigger

54

device. Chamber 2 and valve 4 are similar to those described above and shown in FIGS. 1-5. By analogy, the submarine is divided into two isolated compartments: water 12 and air II, and air compartment 11 is equipped with an air intake tube 16 with a corrugated steamed stopper,

The device works as follows.

Compressor through the tube 16 into the compartment 11 is injected air to a pressure of 0.15-0.2 MPa. This pressure corresponds to a value at which the shape and volume of the device (sub-alloy) remain unchanged under actual loads occurring during both the rafting process and the beam fusion process (the property of crushing of the sub-melt capacity). Specified. The pressure value was obtained as a result of many years of operation of inflatable tanks-submelts. After reaching the compartment

11, the pressure is 0.15-0.2 api; the air supply is stopped, the tube 16 is closed with a stopper and the submelt is placed in the log bristle. All further operations and operation of the device are similar to those described above. After the membrane 7 is dissolved, the water from the compartment 12 is completely displaced, since the initial air pressure in the compartment 11 is certainly higher than the possible hydrostatic pressure.

pressure, t, e, 0.15-0.2 ati more than 0.03-0.11 ati. Thus, the bone-capacitor capacitor completely restores its original density, 3, the outer shell 17

(FIG. 7) is elastic and

breathable, for example, from the capandrite nylon fabric. Inside the shell 17 are placed two identical elastic chambers 2 and 18, similar to those described above. Chamber 2 is equipped with a check valve 4 with a release device, and chamber 18 with an intake pipe 16 with a stop cap. Elements 4 and 16 analog

Gichny described above. As before

the submelt is divided into two insulated W.1X compartments: water 12 and air 11. Compressed air from the compressor is fed into chamber 18 to a pressure in it of 0.15-0.2 MPa. Then the operation of the device is the same as in n, 2,

An embodiment of the design of the device in this tea is a sub-melt in FIG. 8, Here

in the n-outer elastic sheath 17 (an airtight, elastic-shaped chamber 19 is placed, divided into two compartments isolated from each other by a longitudinal elastic partition 20 compartment 11 - air. and equipped with an air intake tube 16 with a stop capJ compartment 12 - water - and equipped back valve 4 with a release device. The check valve is connected to the compartment 12 with a high-pressure valve 21, Elements 4 and I6 are similar to those described above.

Compartment 11 is filled with compressed air to a pressure in the compartment of 0.15 to 3.2 atm. At the same time, elastic processing 20 bends so that the volume of compartment 11 is almost equal to the internal volume of shell 17. After placing the subfloor in the bristle brush in compartment 12, pressurized water is supplied through valve 4 and hose 21. As water is supplied, processing 20 bends in the opposite direction. Next, the operation of the device proceeds in the same way as the devices described above. In this device also, water from compartment 12 is completely expelled in the further air in compartment II, i.e. the device inside the beam completely recovers its original density.

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the invention

1. A method of rafting a wood-alloy beam on water, which consists in placing an airtight container onto the log shear, after which the brush is compressed and wrapped with straps, characterized in that, in order to increase the buoyancy and quality of the beam formed, the density of the airtight container improves to the average density of wood in the brush by filling a part of the tank with water under pressure, and after carrying the compressed brush to wrap it, restore the original density of the sub-alloy.

2. The method according to Claim 1, is different from the fact that the elastic capacitor is filled with air before its installation on the brush to an overpressure of 0.15 - 0.2 atm.

3. A device for rafting a timber-floating beam on the water, containing a hermetic container, characterized in that the internal volume of the hermetic container is divided into two variable volume compartments, each of which is made in the form of an elastic chamber, one of the chambers with an intake tube equipped with a reverse a valve with a vent in the form of a water soluble membrane.

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Claims (3)

Claim 1. The method of rafting a rafted beam on water, namely, that a sealed container is placed on a log brush, after which the brush is compressed and surrounded by strapping, characterized in that, in order to increase the buoyancy and quality of the formed beam, the density of the sealed container is brought to medium density wood in the brush by filling part of the tank with water under pressure, and after cutting the compressed brush with strapping, the original density of the subflood is restored. 2. The method according to claim 1, characterized in that the elastic container is filled with air to an overpressure of 0.15-0.2 ati before installing it on the brush. · 3. Device for rafting a rafted beam on water, containing a sealed container, characterized in that the internal volume of the sealed container is divided into two compartments of variable volume, each of which is made in the form of an elastic chamber, while one of the chambers is made with a suction tube provided with a return valve with drain at ** · · as a water-soluble membrane. figure 1 Fig FIG. 8