CN102862202B - Micro-blasting device inside lumber - Google Patents

Abstract

The invention relates to the field of wood blasting, in particular to a wood internal micro-blasting device in the field of wood blasting. A wood internal micro-explosion device, a wood internal micro-explosion device, comprising a high-pressure cylinder (1) for containing wood, a piston cylinder (2) connected in series with the high-pressure cylinder (1); the high-pressure cylinder (1) A partition (3) is fixed between the piston cylinder (2), and a pressure relief hole (30) connecting the high-pressure cylinder (1) and the piston cylinder (2) is opened on the partition; the piston cylinder (2) and the partition The cylinder wall adjacent to the plate (3) is provided with an exhaust hole (20) communicating with the outside world, and the piston cylinder (2) is provided with a piston (4) that can withstand and seal the pressure relief hole (30). The piston cylinder (2) is provided with a guide rod (7) for guiding the movement of the piston (4). In the present invention, a guide rod for guiding the movement of the piston is provided in the piston cylinder, which can make the piston more stable during movement, reduce the friction between the piston and the side arm of the piston cylinder, and prolong the service life of the piston.

Description

Timber internal micro blasting device

technical field

The invention relates to the field of wood blasting, in particular to a wood internal micro blasting device in the field of wood blasting.

Background technique

Wood is composed of tissues and cells with different sizes, shapes and structures, and the communication between them depends on pit pairs. Therefore, the permeability of tissues, cells and pit pairs is the key factor affecting the permeability of wood and wood modification. more crucial factors. Generally, this kind of wood internal micro blasting device involves the instantaneous release of high-pressure gas and part of high-pressure water inside the wood under the condition of maintaining the physical and mechanical properties and appearance of the wood itself. The tissues, cells and pit pairs inside the wood destroy the structure of the pit plugs, thereby fully improving the permeability of the wood.

The Chinese utility model patent specification whose authorized announcement number is CN201143711Y discloses a wood internal micro blasting device, including a cylinder body, a front end cover, a rear end cover, a partition, and a piston. The front end cover is fixed on the cylinder body by fastening bolts, and the rear The end cover is also fixed on the cylinder body by fastening bolts. There is a partition in the cylinder body. The partition board has a central hole. There are quick exhaust holes on the cylinder wall. The front and rear positions are limited by the partition and the rear end cover, and the rear end cover has intake and exhaust holes, which are connected with the air compressor and the exhaust valve. The cylinder body is divided into left and right chambers, which are separated by a partition. The left cavity is the working cavity, which is used to pressurize the wood, and it is in a sealed state when working; the right cavity is the piston cylinder, and the built-in piston is used to open or close the left working cavity. The damping hole in the center of the piston can realize high pressure filling to the working cavity gas. Its working principle is: in order to realize the micro-blasting inside the wood, it is first necessary to generate high pressure inside the wood. For this reason, the wood should be placed in a closed container, and high-pressure gas should be filled into the container. After holding the pressure for a certain period of time, the internal pressure of the wood and the gas pressure in the container will reach equilibrium, and the internal pressure of the wood will rise. Open, the internal gas is released quickly, the pressure is reduced, and the wood completes the micro-explosion process under the action of the internal and external pressure difference.

Although the above-mentioned device has good operability, low cost, and good blasting effect, due to the pressure relief, the impact force of the piston to the right is relatively large, and sometimes the piston is difficult to ensure smooth movement due to different action points of the impact force.

Contents of the invention

The technical problem to be solved by the invention is to provide a wood internal micro blasting device with smooth piston movement.

In order to solve the above-mentioned technical problems, the technical solution used in the present invention is: a wood internal micro-explosion device, including a high-pressure cylinder used to accommodate wood, and a piston cylinder connected in series with the high-pressure cylinder; the high-pressure cylinder and the piston cylinder are fixed There is a partition, and the partition is provided with a pressure relief hole connecting the high-pressure cylinder and the piston cylinder; the cylinder wall adjacent to the piston cylinder and the partition is provided with an exhaust hole that communicates with the outside world, and the piston cylinder is provided with a vent hole that can The piston of the pressure relief hole is pressed against and sealed, and a guide rod for guiding the movement of the piston is arranged in the piston cylinder.

As a further improvement of the present invention, a buffer spring is sheathed on the position of the guide rod adjacent to the piston cylinder.

As a further improvement of the present invention, there are two or three guide rods, which are uniformly distributed along the circumferential direction.

As a further improvement of the present invention, both ends of the guide rod are respectively screwed to the end cover of the piston cylinder and the partition plate.

As a further improvement of the present invention, the piston includes a sealing plate and a piston plate, the radial dimension of the sealing plate is smaller than the radial dimension of the piston plate and can abut against and seal the pressure relief hole; when the sealing plate abuts and seals the pressure relief hole State, the piston plate avoids the exhaust hole and forms a sealed cavity with the piston cylinder end cover.

As a further improvement of the present invention, the sealing plate and the piston plate are integrally formed.

As a further improvement of the present invention, the sealing plate and the piston plate are integrally connected by bolts.

As a further improvement of the present invention, the piston is provided with an intake pipe penetrating through the high-pressure cylinder and the piston cylinder, and a one-way valve is provided in the intake pipe, and the one-way valve allows gas to enter the high-pressure cylinder in one direction.

As a further improvement of the present invention, an air inlet is opened on the end cover of the piston cylinder.

As a further improvement of the present invention, a gasket is fixed on the surface where the piston and the pressure relief hole are in sealing contact with each other.

In the present invention, a guide rod for guiding the movement of the piston is provided in the piston cylinder, which can make the piston more stable during movement, reduce the friction between the piston and the side arm of the piston cylinder, and prolong the service life of the piston.

Description of drawings

Fig. 1 is a schematic sectional view of the structure of embodiment 1 of the present invention when the piston is sealed.

Fig. 2 is a schematic cross-sectional view of the structure of Embodiment 1 of the present invention when the piston is opened.

Fig. 3 is a schematic sectional view of the structure of embodiment 2 of the present invention when the piston is sealed.

Fig. 4 is a schematic cross-sectional view of the structure of Embodiment 2 of the present invention when the piston is opened.

detailed description

The specific embodiment of the present invention will be further described below in conjunction with accompanying drawing:

Embodiment 1: as shown in Fig. 1, Fig. 2, a kind of micro-explosive device inside wood, comprises the high-pressure cylinder 1 that is used to hold timber, the piston cylinder 2 that is connected in series with this high-pressure cylinder 1, between high-pressure cylinder 1 and piston cylinder 2 is fixed with a partition 3, and the partition 3 is provided with a pressure relief hole 30 connecting the high-pressure cylinder 1 and the piston cylinder 2; Exhaust hole 20, the piston cylinder 2 is provided with a piston 4 that can withstand and seal the pressure relief hole 30, the piston cylinder 2 is provided with a guide rod 7 that guides the movement of the piston 4, and the two ends of the guide rod 7 are connected to the piston cylinder respectively. The end cover 9 and the partition plate 3 are screwed, and the guide rod 7 can make the piston 4 more stable during the movement, reduce the friction between the piston 4 and the side arm of the piston cylinder 2, and prolong the service life of the piston 4. In order to achieve the best effect, There are two or three guide rods 7, which are evenly distributed along the circumferential direction. The position of the guide rod 7 close to the piston cylinder 2 is provided with a buffer spring 8. When the pressure is released, the impact force of the piston 4 to the right is relatively large, and the buffer spring 8 can buffer the impact force of the piston 4 to the right, reducing the contact with the end cover. The collision force of 9 prolongs the service life of the piston.

The surface where the piston 4 and the pressure relief hole 30 are in sealing contact with each other is an inclined plane, and the inclination angle of the inclined plane can be between 5° and 85°, so that after the high-pressure gas enters the piston cylinder 2 from the air inlet 21, the piston 4 can pass through the contacting surface. The inclined surface tightly presses the pressure relief hole 30 to achieve reliable sealing, so that the high pressure can fully act on the wood to improve its blasting effect and blasting efficiency. In order to make the sealing of the piston 4 and the pressure relief hole 30 more reliable, A gasket 6 is fixed on the surface where the piston 4 and the pressure relief hole 30 are in sealing contact with each other. In addition, the gasket 6 can also buffer the contact between the piston 4 and the pressure relief hole 30 . An air inlet 21 is provided on the end cover of the piston cylinder 2, and high-pressure gas is charged from the air inlet 21 during operation.

The piston 4 is located in the piston cylinder 2 and includes an integrally formed sealing plate 41 and a piston plate 42. The radial dimension of the sealing plate 41 is smaller than the radial dimension of the piston plate 42 and can withstand and seal the pressure relief hole 30; In the state of abutting against and sealing the pressure relief hole 30 , the piston plate 42 avoids the exhaust hole 20 and forms a sealed cavity with the end cover of the piston cylinder 2 . Piston 4 is provided with a through intake pipe 40 connecting high-pressure cylinder 1 and piston cylinder 2, and check valve 5 is arranged in this intake pipe 40, and this check valve 5 makes gas enter high-pressure cylinder 1 in one direction, and check valve 5 It is ensured that the high-pressure gas entering the high-pressure cylinder 1 will not run out along the intake pipe 40 .

Embodiment 2: The difference between this embodiment and Embodiment 1 is that the structure of the piston 4 is different, as shown in Figure 3 and Figure 4, the piston 4 of this embodiment is located in the piston cylinder 2, including a sealing plate 41 and a piston plate 42 , The sealing plate 41 and the piston plate 42 are connected into one body by the bolt 7, such connection can be convenient for processing and loading and unloading, and at the same time saves material. The radial dimension of the sealing plate 41 is smaller than the radial dimension of the piston plate 42 and can abut against and seal the pressure relief hole 30; Form a sealed chamber with the end caps of the piston cylinder 2. Equally, the piston 4 can be provided with the intake pipe 40 connected with the high-pressure cylinder 1 and the piston cylinder 2 through. The valve 5 has ensured that the high-pressure gas entering the high-pressure cylinder 1 can not run out along the intake pipe 40 .

Working process embodiment 1 of the present invention is the same as embodiment 2, below with embodiment 1 as example detailed description, referring to Fig. 1 and Fig. 2:

As shown in Figure 1: Put the wood to be blasted into the high-pressure cylinder 1. When blasting, high-pressure gas is charged from the air inlet 21 to push the piston 4 to move to the left until it is in close contact with the pressure relief hole 30, and passes through the inclined surface firmly. Firmly press the pressure relief hole 30 to disconnect the high-pressure cylinder 1 where the wood is located from the exhaust hole 20, and then the pressurized gas enters the high-pressure cylinder 1 from the intake pipe 40 until the pressure inside the blasting device reaches balance, and the pressure on both sides of the piston 4 The air pressure is equal, because the air intake pipe 40 is provided with a check valve 5, the high-pressure gas can only enter from the air intake pipe 40 and cannot run out from the air intake hole 40. Because the radial dimension of the sealing plate 41 of the piston 4 is smaller than the radial dimension of the piston plate 42, the stressed areas on both sides of the piston 4 are not equal, and the stressed area of the piston plate 42 is greater than that of the sealed plate 41, so that the piston 4 When the applied force to the right is less than the force to the left, the resultant force to the left is produced, so that the piston 4 is pressed tightly on the pressure relief hole 30. Wood bears the effect of high-pressure gas in the high-pressure cylinder 1, so that its internal pressure and external pressure are balanced.

As shown in Figure 2: when rapid pressure relief is required, the high-pressure gas is discharged from the air inlet 21 on the right side of the piston 4, and the pressure in the piston cylinder 2 drops rapidly, so that the pressure on the right side of the piston 4 is rapidly lower than that on the left side. The pressure received causes the piston 4 to move quickly and steadily to the right along the cutter bar 7, and the buffer spring 8 can buffer the impact force of the piston 4 to the right, reducing the collision force with the end cover 9, and the pressure relief hole 30 is opened at the same time, so that The gas in the high-pressure cylinder 1 is quickly discharged from the exhaust hole 20, the pressure in the high-pressure cylinder drops sharply, and the pressure gas inside the wood diffuses outwards rapidly to realize blasting.

In summary, while ensuring the advantages of simple operation, low cost and good blasting effect of the blasting device, the present invention can make the piston more stable during movement, reduce the friction between the piston and the side arm of the piston cylinder, and prolong the service life of the piston .

Claims (5)

1. A wood internal micro-explosion device, comprising a high-pressure cylinder (1) for containing wood, a piston cylinder (2) connected in series with the high-pressure cylinder (1), and the end cover of the piston cylinder (2) is provided with Air inlet (21); a partition (3) is fixed between the high-pressure cylinder (1) and the piston cylinder (2), and a pressure relief port connecting the high-pressure cylinder (1) and the piston cylinder (2) is provided on the partition hole (30); the cylinder wall adjacent to the piston cylinder (2) and the partition (3) is provided with an exhaust hole (20) communicating with the outside world, and the piston cylinder (2) is provided with a top-resistance and sealing The piston (4) of the pressure relief hole (30), the contact surface between the piston (4) and the pressure relief hole (30) is an inclined plane; the piston (4) includes a sealing plate (41) and a piston plate (42), the radial dimension of the sealing plate (41) is smaller than the radial dimension of the piston plate (42) and can withstand and seal the pressure relief hole (30); (30) state, the piston plate (42) avoids the exhaust hole (20) and forms a sealed cavity with the end cover of the piston cylinder (2); 4) The moving guide rod (7), the position of the guide rod (7) adjacent to the piston cylinder (2) is provided with a buffer spring (8), and the two ends of the guide rod (7) are respectively connected with the piston cylinder ( 2) The end cover and the partition (3) are screwed together; the piston (4) is provided with an air intake pipe (40) penetrating through the high pressure cylinder (1) and the piston cylinder (2). (40) is provided with a one-way valve (5), and the one-way valve (5) allows gas to enter the high-pressure cylinder (1) in one direction; when performing wood blasting, high-pressure gas is charged from the air inlet (21), Push the piston (4) to move to the left, so that the piston (4) is in close contact with the pressure relief hole (30), press and seal the pressure relief hole (30) through the slope, and its function makes the high pressure cylinder (1 ) is disconnected from the exhaust hole (20), the pressurized gas enters the high-pressure cylinder (1) through the inlet pipe (40), the internal pressure of the blasting device reaches balance, and the air pressure on both sides of the piston (4) is equal; The gas can enter the high-pressure cylinder through the one-way valve (5) through the intake pipe (40); the piston (4) generates a resultant force to the left and presses tightly against the pressure relief hole (30 ); the gas is exhausted from the air inlet (21) on the right side of the piston (4), the piston (4) quickly moves to the right, and the pressure relief hole (30) is opened, and the high-pressure cylinder The gas in (1) is quickly discharged from the vent hole (20), the pressure in the high-pressure cylinder drops sharply, and the pressure gas inside the wood diffuses outwards to realize blasting. 2. A wood internal micro-explosion device according to claim 1, characterized in that: there are two or three guide rods (7), which are evenly distributed along the circumferential direction. 3. A wood internal micro-explosion device according to claim 1, characterized in that: the sealing plate (41) and the piston plate (42) are integrally formed. 4. A wood internal micro-explosion device according to claim 1, characterized in that: the sealing plate (41) and the piston plate (42) are connected into one body by bolts. 5. A wood internal micro-explosion device according to any one of claims 1 to 4, characterized in that: a seal is fixed on the surface of the piston (4) and the pressure relief hole (30) in sealing contact with each other. Pad (6).