Pneumatic impact site with the sleeve valve

 

The invention relates to construction equipment and is intended for sinking wells in the ground, the driving rod elements in the soil, compacting soil, and so on Pneumatic impact site includes a housing with inlet and exhaust openings, mounted in the housing for movement drummer, camera forward and reverse channel in the drummer for messages cameras direct and reverse, limiters forward and reverse progress made on the inner surface of the housing, the shut-off valve of the reverse camera. Shut-off valve of the reverse camera is a sleeve valve in the form of elastic flange, attached through a ring in an annular end groove drummer with the formation of the gap clearance between the elastic flange and annular end groove drummer for the passage of exhaust air. The annular end groove drummer connected by canals with the reverse camera, and the end surface of the elastic flange adjacent to its side surface is made of a sealing band, tightly contact with the inner surface of the cylindrical body. The invention provides improved robotsmeta all the way movement of the striker when working stroke. 3 Il.

The invention relates to the construction techniques and is intended for sinking wells in the ground, the driving rod elements in the soil, compacting soil, and so on,

A device impact (see , for example, the patent of the Russian Federation 2072912, B 25 D 17/00,9/04, publ. 1997, B 4), comprising a housing with inlet and outlet holes and installed with the possibility of axial movement drummer, dividing the housing into chambers backward and forward movement, placed in the back-stroke chamber, an elastic element mounted coaxially with the outlet and placed in the last shutoff valve, and an elastic element, one end fixed the shut-off valve, and the other on the drummer or the case.

The disadvantage of this device is limited performance due to the reduction of the impact energy by braking of the air in the chamber reverse.

The closest technical solution is the percussion device (see, for example, the patent of the Russian Federation 2105881, E 21 3/24, F 02 F 5/18, publ. 1998 , BI 6), comprising a housing with inlet and exhaust openings, mounted in the housing for movement drummer, camera forward and reverse channel in the drummer for sooleawa groove, on the inner surface of the front case is made annular ledge and the limiter reverse and stop valve is made in the form of a thrust ring mounted in the annular groove of the striker with the ability to interact with the inner surface of the housing.

The disadvantage of this device is increased wear of the shut-off valve due to the complex deformation during the operating cycle, which reduces the reliability of the device.

The technical problem is to increase the health impact site and the deepening of the business cycle by providing reliable exhaust from the camera to reverse all the way movement of the striker when working stroke.

The technical problem is solved as follows.

In the pneumatic shock site with the sleeve valve comprising a housing with inlet and exhaust openings, mounted in the housing for movement drummer, camera forward and reverse channel in the drummer for messages cameras backward and forward movement, the stopper forward and reverse progress made on the inner surface of the housing, the check valve from the camera-reverse, according to the technical solution shut-off valve from the camera to reverse Lavoy end groove drummer with the formation of the gap clearance between the elastic flange and annular end groove drummer for the passage of exhaust air, this annular end groove drummer connected by canals with the reverse camera, and the end surface of the elastic flange adjacent to its side surface is made of a sealing band, tightly contact with the inner surface of the cylindrical body.

Significant differences of the proposed technical solutions are the following.

A shut - off valve of the reverse camera is a sleeve valve in the form of elastic flange, attached through a ring in an annular end groove drummer with the formation of the gap clearance between the elastic flange and annular end groove drummer for the passage of exhaust air, with the annular end groove drummer connected by canals with the reverse camera.

This ensures the specified stroke elastic flange on the amount of 0.5-3.0 mm, sufficient for the passage of exhaust air from the camera-reverse, which, in turn, provides the stability of a shock site and deepening of the business cycle by providing reliable exhaust from the camera to reverse all the way movement of the striker when working stroke.

Small x is gathogo air. Small bends (0,5-3,0 mm) elastic flange ensure the operability of the site, minimizing fatigue alternating voltage.

On the end surface of the elastic flange adjacent to its side surface is made of a sealing band, tightly contact with the inner surface of the cylindrical body. This ensures reliable sealing of the camera-reverse, which reduces the compressed air consumption and increases stability. Sealing sealing band made of elastic material ensures reliable operation by reducing wear of the cylindrical part of the hull in the area of reverse camera, as well as compensation of the wear of the elastic properties of the material.

In addition, reduced requirements for precision parts manufacturing pneumatic shock site that simplifies the design and manufacturing technology.

The essence of the technical solution is illustrated by the example of the pneumatic shock site shown in Fig.1, 2 and 3.

In Fig.1 is a schematic diagram of the General form of the pneumatic shock site is a vertical section; Fig.2 - node a in Fig.1 in an enlarged scale; Fig.3 1 (Fig.1), installed it with the ability to move the striker 2 and the camera 3 direct and reverse 4 stroke. In the housing 1 has an inlet port 5 and the exhaust port 6. On the inner surface 7 of the housing 1 is made limiter 8 reverse. The drummer made 2 channel 9 restricted section for messages reverse camera 4 camera 3 forward stroke. Shut-off valve 10 of the chamber 4 reverse is a sleeve valve and made in the form of elastic flange 11 (Fig.2), attached through a ring 12 in the annular end groove 13 of the striker 2 with the formation of gap junction gap 14 between the elastic flange 11 and an annular end groove 13 of the striker 2 for the passage of exhaust air from the chamber 4 reverse. This groove 13 channels 15 and 16 are connected to the camera 4 reverse. On the end surface of the elastic flange 11 adjacent to the lateral surface 17, is made of a sealing band 18, which is tightly in contact with the inner surface 7 of the cylindrical housing 1.

The sealing surface 19 of the annular end groove 13 is made flat or curved, as shown in Fig.2.

When a curved surface 19 improve conditions ger is elasticdog flange 11 on the limiter 8 reverse ring 12 should be carried out with the bevel 20. In the lower part of the inner surface 7 of the cylindrical body has a stopper 21 for forward travel in contact with the end portion of the sealing band 18.

Pneumatic percussion node works as follows.

Compressed air through the opening 5 into the chamber 3 a forward stroke. Under the pressure of the compressed air drummer 2 is moved to the extreme bottom (drawing) position and abuts against the front face of the housing 1. On channel 9, the compressed air enters the chamber 4 reverse and it starts to increase the pressure.

Increasing the pressure in the chamber 4 reverse assigns elastic flange 11 from the initial state and overlaps the slit gap 14 (the pressure in the gap the gap 14 will be less due to air movement compared to the pressure of compressed air from the opposite side of the ring 12). Due to growing pressure in the chamber 4 reverse sealing band 18 is pressed against the inner surface 7. Moreover, as experiments show, the sealing of the sealing band 18 and overlap slotted gap 14 elastic flange 11 is instantly and clearly even at very low pressure compressed air.

The incoming compressed Vozduh stroke due to the difference of the squares of the 3 cameras direct and reverse 4 stroke drummer 2 is moved to the upper position (on the drawing). Touch the limiter 8 reverse with elastic flange 11 drummer 2 stops, it will disengage from the sealing surface 19, reveals a slit gap 14 and from the chamber 4 reverse will start to exhaust air through the channels 16 and 15.

Drummer 2 some time moves by inertia, while the bent elastic flange 11, which contributes to the bevel 20 on the ring 12.

After braking drummer 2 stops under the action of pressure in the chamber 3 a forward stroke will begin to move downward (in the drawing), making a working stroke, the movement of the gap 14 is open, and from the reverse camera 4 will be coming out the exhaust air.

Before striking drummer 2 on the front end of the body 1 end part of the sealing band 18 will meet with the limiter 21 forward stroke, the elastic flange 11 when the deformation will cover the gap 14, and will be sealing the chamber 4 reverse.

After the strike due to the incoming air in the sealed chamber 4 reverse drummer 2 will start to do the reverse.

Due originally created the elastic deformation of the flange 11 and the excess pressure from the chamber 4 Ob meeting elastic flange 11 with the stopper 8-reverse, and the cycle will repeat.

Claims

Pneumatic impact site with the sleeve valve comprising a housing with inlet and exhaust openings, mounted in the housing for movement drummer, camera forward and reverse channel in the drummer for messages cameras direct and reverse, limiters forward and reverse progress made on the inner surface of the housing, the check valve from the camera-reverse, characterized in that the shutoff valve of the reverse camera is a sleeve valve in the form of elastic flange, attached through a ring in the annular end groove drummer with the formation of the gap clearance between the elastic flange and annular end groove drummer for the passage of exhaust air, with the annular end groove drummer connected by canals with the reverse camera, and the end surface of the elastic flange adjacent to its side surface is made of a sealing band, tightly contact with the inner surface of the cylindrical body.

 

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SUBSTANCE: invention relates to road building and repair machines. Proposed impact plant for driving-in guard posts has base chassis which carries platform body, mast with hydraulic cylinder, slider and hydraulic hammer and mechanism for setting mast in working position. Mast setting mechanism consists of two articulated levers, first being connected by one end through common axle with faceplate mounted on platform body and provided with several fixed positions, and by other end, with second lever on free end of which mast is secured by universal joint. Levers are arranged for control by hydraulic cylinders with floating pistons. One of control hydraulic cylinders is installed between faceplate and first lever, and the other is arranged between levers. Hydraulic hammer is mounted on slider arranged on mast and suspended from wire rope passing over movable sheave connected with rod of hydraulic cylinder secured on mast. Other end of wire rope is connected with mast installed for crosswise and longitudinal tilting by means of control hydraulic cylinders. Hydraulically operated pivot with cutout is installed on lower end of mast. Shackle is freely mounted on lever joint and is connected by one tie-rod with faceplate and by other tie-rod, with universal joint.

EFFECT: enlarged operating capabilities and increased capacity of machine.

7 dwg

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