RU2239498C2 - Device for drainage pipes inner surface cleaning - Google Patents

Abstract

FIELD: agriculture; drainage pipes cleaning.

SUBSTANCE: the invention is dealt with agriculture and may be used to increase efficiency of the drain pipes cleaning. The device contains: a detachable hollow housing with a front nozzle and back jet nozzles; a water duct rigidly fixed inside the housing; a pneumatic tool of impact action mounted in the water duct; a front gear of the pulse jets agitation located in a front part of the device; the rear gears of the pulse jets agitation mounted in a slant part of the water duct and a back slant part of the housing; air nozzles mounted in the rear slant part of the housing between the rear jet nozzles. The pneumatic tool of impact action contains: a pneumatic cylinder with an air distribution valve system; a piston; an anvil block with the process holes mounted in a guiding bush and put on an axial water-feeding pipe; an air duct fixed in the tail of the cylinder; a pusher, the tail part of which is slant and rigidly linked with the anvil block; a return spring. The front gear of the pulse jets agitation contains: an axial water-feeding pipe rigidly mounted in the body of the cylinder and passing along its axes; a front nozzle, that forms a stream and is rigidly linked with the anvil block; a guiding bush rigidly fixed in the front part of the housing; the rear gears of the pulse jets include: jet nozzles made streams-forming with the process holes, guiding connection pipes and bushes, return springs and thrust washers. The invention ensures increase of efficiency of the pipes inner surface cleaning and decrease of the working substance consumption.

EFFECT: increase of efficiency of the pipes inner surface cleaning and decrease of the working substance consumption.

2 dwg

Description

The invention relates to agriculture and can be used to increase the efficiency of cleaning drainage pipes.

A device is known for cleaning the inner surface of pipes, comprising a hollow multi-stage housing with nozzle openings, inside which a spool valve is arranged, made in the form of a hollow stem with radial holes and partitions placed on the housing perpendicular to the stem (ed. St. No. 735334, class B 08 B 9/02, 05/26/80).

The main disadvantages of this device are: overspending of the working agent due to the large number of nozzles, as well as the difficulty of moving along the pipeline in connection with the direction of their action both in the direction of travel of the device and against it.

The closest technical solution to the invention is a device for cleaning the inner surface of pipelines (ed. St. USSR No. 957997, class B 08 B 9/04, 09/15/82), including a hydro-jet nozzle with front and rear jet nozzles, mounted on a hose for washing liquid supply, and a cuff with rear nozzles, equipped with a hose for supplying compressed air, placed on the side surface of the nozzle with the possibility of axial movement relative to it.

The main disadvantages of this device are: nozzles during its movement along the pipe to be cleaned will stop or slow down due to the engagement of the cuff and air hose located outside the device for alluvial deposits. Inconsistent operation of water and air jets leads to interference in the formation of that compact part of the jet, which is necessary for erosion of alluvial deposits.

The invention is aimed at improving the cleaning efficiency of the inner surface of pipes, for example, in silted pipelines and the economical consumption of a working agent in a device for cleaning the inner surface of pipes.

A device for cleaning the inner surface of the pipes, containing a detachable hollow body with a front nozzle and rear jet nozzles, equipped with a conduit mounted motionless inside the body; pneumatic shock mechanism fixed in the water conduit; the front excitation mechanism of the pulsating jets located in front of the device; rear pulsating jets excitation mechanisms installed in the inclined part of the water conduit and the end inclined part of the body; air nozzles located in the rear inclined portion of the housing between the rear jet nozzles; moreover, the pneumatic mechanism of the shock action includes a pneumatic cylinder with a spool air distribution system, a piston, a hammer with technological holes installed in the guide sleeve and mounted on an axial water supply tube; an air duct fixed to the rear of the cylinder, a pusher, the rear of which is made inclined, rigidly connected to the striker; return spring; the front excitation mechanism of the pulsating jets contains an axial water supply tube fixedly installed in the cylinder body and passing along its axis, a front nozzle made by jet forming, fixedly connected to the striker, a guide sleeve fixed motionless in the front of the housing; The rear excitation mechanisms of pulsating jets include jet nozzles made with jet forming with technological holes, guide nipples and bushings, return springs and thrust washers.

Figure 1 shows the device in section; figure 2 is a rear view. A device for cleaning the inner surface of the pipes consists of: a housing 1, comprising front and rear parts connected by a threaded connection (position not shown); a water conduit 2, mounted in the rear of the housing 1 with a threaded connection; a pneumatic impact mechanism, consisting of: a pneumatic cylinder 3 with an air distribution system in the form of channels 4, mounted in front of the conduit 2 on a threaded connection; spool 5; piston 6; striker 7 with technological holes 8 installed in the guide sleeve 9; an air duct 10 secured by a threaded connection at the rear of the cylinder 3; a pusher 11, the rear of which is made inclined, connected to the striker 7 by a threaded connection; return spring 12; the front excitation mechanism of pulsating jets located in the front of the housing 1, consisting of: an axial water supply tube 13, fixedly installed in the body of the cylinder 3 and passing along its axis; the front nozzle 14, made by jet forming, motionlessly connected by a threaded connection to the striker 7; a guide sleeve 15 secured by a threaded connection in front of the housing 1; rear excitation mechanisms of pulsating jets, the axes of which are perpendicular to the inclined surface of the water conduit 2, consisting of: jet nozzles 16 made by jet-forming, with technological holes 17; guide fittings 18 and bushings 19; return springs 20 and thrust washers 21; air nozzles 22 located in the rear inclined part of the housing 1 in diameter between the jet nozzles 16.

The proposed device operates as follows.

When the compressor operator starts the compressor, the air supplied under pressure enters through the air duct 10 into the pneumatic cylinder 3, acts alternately on both sides of the piston 6 and makes it reciprocate.

At the end of the stroke, the piston 6 strikes at the rear of the striker 7, as a result of which translational motion is made with the pusher 11 fixed in its body, the front nozzle 14 along the guide bushings 9 and 15. The return spring 12 is compressed. The distance between the slice of the axial water supply tube 13 and the rear of the front nozzle 14 increases. Technological openings 8 are opened in the body of the striker 7.

At the moment of compression of the return spring 12, the ends of the jet nozzles 16 are released from the rear inclined part of the pusher 11 and are pressed out by the return springs 20, moving progressively along the guide bushings 19 and the fittings 18. There is a decrease in the distance between the inner sections of the jet-forming parts of the jet nozzles 16 and the front sections of the guide fittings 18 Moreover, the technological holes 17 in the jet nozzles 16 are blocked by guide fittings 18.

The return spring 12 is made with a stiffness exceeding the total rigidity of the return springs 20.

The exhaust air from the pneumatic cylinder 3 through the channel 4 enters the internal cavity of the housing 1, rushes through the air nozzles 22, the technological holes 8, the front nozzle 14 to the sediment deposits in the pipe cavity. Moreover, the inner diameter of the nozzles 22 exceeds the diameter of the technological holes 8 and 17.

The pressure overshoot in the cylinder 3, when the channels 4 open at the moment the piston 6 hits the striker 7, forces the spool 5 to move back. Being in a shifted position, the spool 5 opens those sections of channels 4 that were previously inaccessible. Air through the opened sections of the channels 4 acts on the front of the piston, forcing it to move to its original position. When the piston 6 returns to its original position and the channels 4 are blocked, the spool 5 will move forward. The air outlet into the cavity of the housing 1 from the cylinder 3 will stop.

Freed from the compression force, the return spring 12 will unclench and force the striker 7 with the pusher 11 fixed in its body and the front nozzle 14 to make a return movement along the guide bushings 9 and 15. Moreover, the technological holes 8 are blocked by an axial water supply pipe 13.

Moving back, the pusher 11 through its rear inclined part transfers the load to the ends of the jet nozzles 16, forcing them to move along the guide fittings 18 and the bushings 19. The return springs 20 are compressed. Moreover, in the jet nozzles 16 open the technological holes 17.

The cycle of the mechanisms is completed.

After starting the compressor and the beginning of the mechanisms, water under pressure is supplied to the conduit 2.

Rushing through the holes in the guide fittings 18, the axial water supply pipe 13, the hydraulic jets are saturated with air through the technological holes 17 and 8, exit through the jet-forming parts of the nozzles 16 and 14 to the sediment deposits in the form of pulsating jets. The formation of pulsating jets occurs due to a change in the range of the jets due to the reciprocating movement of the nozzles 16 and 14 relative to the front sections of the water supply guide fittings 18 and the axial water supply pipe 13.

Since the technological holes 17 and 8 in the nozzles 16 and the striker 7 are alternately overlapped by the guide fittings 18 and the axial water supply pipe 13, in addition to the water-air jets, hydraulic jets will also be formed.

A set of pulsating air, water-air and hydraulic jets will significantly increase the degree of purification from sediment in the pipeline cavity.

Since the interaction of mechanisms is carried out under shock loads, it is natural that the vibration will be transmitted to the device body, contributing to a confident advancement in the pipe cavity.

Relying on a cone formed under the action of reactive pulsating air, water-air and hydraulic jets, as well as with the help of vibration, the device will not abut its front part in the inner cavity of the pipe, but will effectively destroy the dense layers of silt and confidently move in the cavity of the pipeline.

Claims (1)

A device for cleaning the inner surface of the pipes, comprising a detachable hollow body with a front nozzle and rear jet nozzles and equipped with a conduit mounted motionless inside the body; pneumatic shock mechanism fixed in the water conduit; the front excitation mechanism of the pulsating jets located in front of the device; rear excitation mechanisms of pulsating jets installed in the inclined part of the conduit and the rear inclined part of the body; air nozzles located in the rear inclined part of the housing between the rear jet nozzles, and the pneumatic impact mechanism includes a pneumatic cylinder with a spool air distribution system, a piston, a hammer with technological holes installed in the guide sleeve and mounted on an axial water supply tube, an air duct fixed in the rear parts of the pneumatic cylinder, the pusher, the rear of which is made inclined, rigidly connected to the striker, a return spring; the front excitation mechanism of the pulsating jets contains an axial water supply tube fixedly installed in the body of the pneumatic cylinder and passing along its axis, a front nozzle made by jet-forming, fixedly connected to the striker, a guide sleeve fixed motionless in the front of the housing; The rear excitation mechanisms of pulsating jets include nozzles made by jet-forming with technological holes, guide nipples and bushings, return springs and thrust washers.

Images