Reverse percussion device

FIELD: mining and building equipment, particularly to drive pipes and form holes in ground for following underground service pipeline laying.

SUBSTANCE: device comprises body, reciprocating hammer arranged in the body and having throttle channel and orifices for air inlet and discharge, as well as elastic valve. Body and hammer define forward stroke and reverse stroke chambers communicating with air supply pipeline through connection pipe. Collar with longitudinal slots is created on rear hammer end and adapted to communicate reverse stroke chamber with atmosphere. Body interior has several ledges. Elastic valve is installed on hammer between collar and above orifices. When the hammer is in its extreme front position inner cylindrical surface of body ledge having lesser diameter is in contact with outer cylindrical surface of elastic valve.

EFFECT: reduced compressed air consumption and increased stroke power due to decreased reverse stroke chamber size and prevention of air compression inside the reverse stroke chamber during forward hammer movement.

2 cl, 1 dwg

 

The invention relates to the field of mining and construction equipment and is intended for plugging tubes and formation of holes in the ground at the trenchless laying of underground utilities.

Known pneumatic impact for the formation of wells in the ground by A.S. USSR №382797, E 02 F 5/18, E 21 B 11/02, E 02 D 17/146, publ. in BI No. 23, 1973, It includes a housing, a drummer, air supply pipe connected at one end through the elastic sleeve with the housing and is provided with an elastic element installed liner that interacts with the inner surface of the striker. The disadvantage of this device is a low impact efficiency due to the resistance of the direct course of the drummer from the reverse camera after closing of the exhaust window.

It is also known pneumatic percussion device for making holes in soil by A.S. USSR №794115, E 02 F 5/18, publ. in BI No. 1, 1981, It includes a housing with a window, manual drummer with axial and radial channel facing cylindrical surface is wider nut with vozduhopotok channel. The window casing is displaced circumferentially relative to the radial channel drummer, on a larger stage drummer made a groove whose length equals the length of stroke of the striker. The housing has a protrusion mounted on it with entries batch is I with a groove drummer. The disadvantage of this device is the low efficiency hit due to the resistance of the direct course of the drummer from the reverse camera by insufficient exhaust compressed air from the camera to reverse.

The closest in technical essence and essential features for the proposed solution is a pneumatic reversing device for the formation of wells in the ground by A.S. USSR №1250619, E 02 F 5/18, publ. in BI No. 30, 1986, It contains housed in a cylindrical housing movable drummer, forming therein a working camera, periodically communicate with vozduhoprovodyaschih highway through the dispenser, made in the form connected with vozduhoprovodyaschih line pipe, of a spring-loaded valve and release valve, the camera is the battery, which communicated with vozduhoprovodyaschih highway.

The disadvantage of this device is the low efficiency of the flow of compressed air and lack of effectiveness of the shock caused by the feature distribution in which the average position of the striker relative to the housing front working chamber isolated from the highway and from the atmosphere. Therefore, the movement of the striker ago, after the termination of the message of the anterior chamber with the highway, possibly due to the extension are compressed there who is ear. The air pressure in the anterior chamber with the falls and so it did not fall below the critical value at which the movement of the striker back may stop before it reaches the position in which the anterior chamber is communicated with the atmosphere, requires significant initial volume of the anterior chamber. And in order to create pressure to a greater extent, you need a larger quantity of compressed air. Thus, the presence of the original volume of the anterior chamber inevitably entails an increase of the consumption of compressed air, the more, the more the original volume of the anterior chamber. During the stroke of the striker forward in its average position stops the message of the anterior chamber with the atmosphere, and upon further movement of the striker in this chamber the air is compressed, creating the resistance force of the striker, which reduces its speed before striking and, as a consequence, the reduction of the impact energy.

The technical problem to be solved by the proposed device is the reduction of compressed air consumption and increase the impact energy by reducing the volume of the chamber reverse and prevent compression of air in this chamber during the stroke of the striker forward.

The problem is solved in that in the reversible percussion device, comprising a housing in Berlin is blessed with the ability reciprocating motion of the striker, which made throttling channel and the window for intake and exhaust air, and an elastic valve, the housing and the drummer form the camera backward and forward movement, communicated with vozduhoprovodyaschih highway through a pipe, according to the technical solution of the rear end of the striker made a collar with longitudinal grooves in which the back-stroke chamber communicated with the atmosphere, the body inside is made stepwise, and the resilient valve is installed on the drummer between the collar and Windows for intake and exhaust of air. The inner cylindrical surface of the step of smaller diameter in contact with the outer cylindrical surface of the elastic valve at the extreme forward position of the striker. The set of features of the proposed device provides the ability to get a work cycle without expansion of the air in the working chambers. As a consequence, achieve high efficiency of the flow of compressed air, since the initial volume of the chamber reverse may be zero, and high values of impact energy, as throughout the stroke of the back-stroke chamber communicates with the atmosphere and does not create resistance to movement of the striker.

Appropriate box on the drummer for intake and exhaust of air to perform so that their size was greater than the cross sectional area of the throttling is the anal, that reduces compressed air consumption.

The essence of the technical solution is illustrated in the drawing, which shows a longitudinal section of a reversible percussion device, and a description of his work.

Reversible percussion device consists of a cylindrical body 1 holds drummer 2, in the cavity which includes the pipe 3 attached to the tube 4. On the rear end of the striker 2 has a collar 5. The body 1 is internally performed stepwise, with the inner cylindrical surface of the step of smaller diameter in contact with the outer cylindrical surface of the elastic valve 6 installed between the collar 5 of the striker 2 and Windows 7 for intake and exhaust air (hereinafter Windows 7), when the extreme forward position of the striker. Drummer 2 is made with grooves 8 on the collar 5 and a throttling channel 9. Within the body 1 of the tube 4 is installed sleeve 10 with a channel (not labeled). The device has camera 11 forward stroke, 12-reverse, formed by the housing 1 and drummer 2, and the exhaust chamber 13. Compressed air is supplied to the device through the hose 14 from the compressor.

The device operates as follows. In the moment of striking the body 1 drummer 2 is in the leftmost position in the drawing. With the Windows 7 drummer 2 are opened and the compressed air from the compressor through the hose 14 from the chamber 11 is nternet progress through Windows 7 and throttling channel 9 into the chamber 12 reverse. Under the pressure of the compressed air and by the difference in work areas from the cameras 11 and 12 drummer 2 moves to the right in the drawing. When this elastic valve 6, stretched under the action of compressed air pressure on its inner cylindrical surface, the outer surface is pressed against the inner cylindrical surface level of the larger diameter of the housing 1, thereby isolating the chamber 12 reverse from the exhaust chamber 13. After Windows 7 overlap the pipe 3, drummer 2 continues to move to the right in the drawing by the entry of compressed air into the chamber 12 reverse through the throttling channel 9. When Windows 7 drummer 2 will pipe 3, the compressed air from the chamber 12 reverse flows into the exhaust chamber 13 and through the channel of the sleeve 10 is its exhaust into the atmosphere. The pressure in the chamber 12 reverse falls, elastic valve 6 due to its own elasticity is compressed, moving away from the inner cylindrical surface of the housing 1, and further informs the camera 12 reverse through the resulting gap and grooves 8 with the exhaust chamber 13 and the atmosphere. Under the action of air pressure in the chamber 11 of the forward stroke of the striker 2 stops, then starts moving to the left in the drawing. With the Windows 7 again overlap the pipe 3, but the exhaust air from the chamber 12 opposite the ode continues through the gap between the elastic valve 6 and the housing 1. Before striking the Windows 7 again opened, letting the camera 11 forward stroke with the camera 12 reverse. In the end of the stroke of the striker 2 elastic valve 6 of the outer cylindrical surface is pressed against the inner cylindrical surface of the tread of a smaller diameter casing 1, an insulating chamber 12 reverse from the exhaust chamber 13. Drummer 2 strikes to the body 1. Then the cycle repeats.

The proposed device allows you to change the direction of impact, i.e. to reverse. The principle of operation of the reversing mechanism is known. A feature of the inventive device when the reverse mode of operation is that the inlet of compressed air into the chamber 12 reverse earlier, and exhaust of compressed air from the exhaust chamber 13 and the chamber 12 reverse later than the direct course of the unit. This is achieved by shifting the nozzle 3 toward the rear side of the device. A feature of this device is that at the moment of opening of Windows 7 elastic valve 6 due to the action of aerodynamic forces when the pressure under the valve 6 is higher than over valve 6, closes the message camera 12 reverse with the atmosphere. This leads to a smooth stop of the striker 2 while moving to the left in the drawing to strike to the body 1.

1. Reversible percussion device loads the via, includes building, situated in it with the ability reciprocating motion of the striker, which made throttling channel and the window for intake and exhaust air, and an elastic valve, the housing and the drummer form the camera backward and forward movement, communicated with vozduhoprovodyaschih highway through the nozzle, characterized in that the rear end of the striker made a collar with longitudinal grooves in which the back-stroke chamber communicated with the atmosphere, the body inside is made stepwise, and the resilient valve is installed on the drummer between the collar and Windows for intake and exhaust of air, while the inner cylindrical surface of smaller steps the diameter of the shell in contact with the outer cylindrical surface of the elastic valve at the extreme forward position of the striker.

2. The device according to claim 1, characterized in that the area of the intake and exhaust air more cross sectional area of the throttling channel.



 

Same patents:

FIELD: mining and building, particularly for trenchless pipeline laying under roads and other engineering structures.

SUBSTANCE: device comprises retaining wall arranged in pit. The retaining wall is adapted to cooperate with power equipment and ground and is formed as movable container having dimensions and formed of material, which provide collapse of container brought into contact with ground. Movable container comprises bottom with processing orifice, vertical cylindrical wall with handling lugs and hinged lid. Power equipment and operator's station are arranged inside the container. Storage vessels are located in lower side parts of movable container.

EFFECT: decreased load applied to ground and reduced support size.

2 dwg

FIELD: trenchless underground pipe laying.

SUBSTANCE: invention relates to trenchless laying of underground pipelines of considerable length and preset trajectory. Proposed punch includes body accommodating reciprocating striker with bore in rear part, spool getting into bore by larger diameter step with sliding. Spool consists of branch pipe secured in rear part of body and sleeve connected with branch pipe for sliding and spring-loaded relative to rear part of body with at least one radial pin getting into ring zigzag slot made on part fixed on body. Sleeve of spool encloses front part of its branch pipe, being spool larger diameter step, and said ring zigzag slot is made on outer surface of branch pipe. According to first design version, at least one radial hole is made on front parts of branch pipe and spool sleeve. According to second design version, flats are made additionally on outer surface of branch pipe displaced towards rear part of branch pipe. According to third design version each second cavity on rear side of ring zigzag slot is extended to side of rear part of branch pipe.

EFFECT: improved reliability and increased service life owing to making of pneumatic punch of closed type with reversing of delivery of compressed air simply by switching off and on.

7 cl, 19 dwg

FIELD: mining industry and building, particularly equipment for trenchless pipe laying under roads and other engineering structures.

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EFFECT: increased structure simplicity and reliability.

4 dwg

FIELD: construction.

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EFFECT: enhanced efficiency.

1 dwg

FIELD: mining industry, particularly devices for trenchless pipeline laying under roads and other engineering structures.

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EFFECT: enlarged sphere of application and improved reliability in operation.

3 cl, 1 tbl, 1 dwg

FIELD: building, particularly for laying pipelines, for constructing buried passages during pipeline laying, laying cable lines and power lines.

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EFFECT: increased operational efficiency.

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FIELD: mining industry.

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2 cl, 1 dwg

FIELD: construction, applicable for trenchless laying and replacement of underground pipe-lines.

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The invention relates to mining and construction equipment and is intended for trenchless laying of underground utilities

FIELD: construction, applicable for trenchless laying and replacement of underground pipe-lines.

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EFFECT: provided automatic cyclic action of the pneumatic percussion mechanism.

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FIELD: mining industry.

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FIELD: building, particularly for laying pipelines, for constructing buried passages during pipeline laying, laying cable lines and power lines.

SUBSTANCE: device has hollow conical working tip connected with stem through hinge and through rotary support. Stem is secured in rotary supports to flange mounted on front end of pipeline in the line of puncture direction. Installed in pipeline to be laid is vibrator drive connected to stem. Device has cage connected to stem, vibrator forming circular vibrations and made as unbalance. Unbalance is formed as hollow cylinder sector arranged inside working tip on rotary supports and connected to cage. Device also includes feeding mechanism.

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3 cl, 4 dwg

FIELD: construction.

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EFFECT: enhanced efficiency.

1 dwg

FIELD: mining industry and building, particularly equipment for trenchless pipe laying under roads and other engineering structures.

SUBSTANCE: device comprises rod and hollow bush connected thereto and enclosing ends of longitudinal composite reamer sections. Radial cut is formed in hollow bush. Rod is composed of sections having equal lengths. Each section comprises outer conical thread created from one section end and inner thread corresponding to outer one formed from opposite section end. Each section has annular groove with length equal to hollow bush thickness. Hollow bush cut encloses outer annular groove. Each section of composite reamer is installed on rod section and supported in two points spaced along section length. Each support point is formed as two mating hexahedrons.

EFFECT: increased structure simplicity and reliability.

4 dwg

FIELD: trenchless underground pipe laying.

SUBSTANCE: invention relates to trenchless laying of underground pipelines of considerable length and preset trajectory. Proposed punch includes body accommodating reciprocating striker with bore in rear part, spool getting into bore by larger diameter step with sliding. Spool consists of branch pipe secured in rear part of body and sleeve connected with branch pipe for sliding and spring-loaded relative to rear part of body with at least one radial pin getting into ring zigzag slot made on part fixed on body. Sleeve of spool encloses front part of its branch pipe, being spool larger diameter step, and said ring zigzag slot is made on outer surface of branch pipe. According to first design version, at least one radial hole is made on front parts of branch pipe and spool sleeve. According to second design version, flats are made additionally on outer surface of branch pipe displaced towards rear part of branch pipe. According to third design version each second cavity on rear side of ring zigzag slot is extended to side of rear part of branch pipe.

EFFECT: improved reliability and increased service life owing to making of pneumatic punch of closed type with reversing of delivery of compressed air simply by switching off and on.

7 cl, 19 dwg

FIELD: mining and building, particularly for trenchless pipeline laying under roads and other engineering structures.

SUBSTANCE: device comprises retaining wall arranged in pit. The retaining wall is adapted to cooperate with power equipment and ground and is formed as movable container having dimensions and formed of material, which provide collapse of container brought into contact with ground. Movable container comprises bottom with processing orifice, vertical cylindrical wall with handling lugs and hinged lid. Power equipment and operator's station are arranged inside the container. Storage vessels are located in lower side parts of movable container.

EFFECT: decreased load applied to ground and reduced support size.

2 dwg

FIELD: mining and building equipment, particularly to drive pipes and form holes in ground for following underground service pipeline laying.

SUBSTANCE: device comprises body, reciprocating hammer arranged in the body and having throttle channel and orifices for air inlet and discharge, as well as elastic valve. Body and hammer define forward stroke and reverse stroke chambers communicating with air supply pipeline through connection pipe. Collar with longitudinal slots is created on rear hammer end and adapted to communicate reverse stroke chamber with atmosphere. Body interior has several ledges. Elastic valve is installed on hammer between collar and above orifices. When the hammer is in its extreme front position inner cylindrical surface of body ledge having lesser diameter is in contact with outer cylindrical surface of elastic valve.

EFFECT: reduced compressed air consumption and increased stroke power due to decreased reverse stroke chamber size and prevention of air compression inside the reverse stroke chamber during forward hammer movement.

2 cl, 1 dwg

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