RU16158U1 - PNEUMATIC DEVICE - Google Patents

Abstract

The utility model relates to pneumatic percussion mechanisms intended primarily for trenchless laying of new underground utilities and reconstruction of new ones.

The technical problem solved by the utility model is the expansion of functionality, increasing reliability and ease of use.

The problem is solved in that in a pneumatic impact device including a hollow body, a drummer located therein, an idle chamber and a stroke chamber formed by the inner surface of the body, the face of the hammer and an air distributor installed in the hammer, made with channels for the intake of compressed air and exhaust exhaust air from the working chamber, the air inlet pipe and the air duct, the idle chamber is formed by the air inlet pipe, the air distributor and the inner surface firing pin, and the idle kilometer is constantly in communication with a source of compressed air.

This allows you to increase reliability by simplifying the design - there is only one air distribution system. The design is simple in execution and easy to maintain.

Description

Pneumatic impact device

The proposed utility model relates to pneumatic impact mechanisms intended primarily for trenchless laying of new underground utilities and reconstruction of old ones.

A device is known (Yesin N.N. Kostylev A.D. et al. Pneumatic impact machines for driving wells and holes. Novosibirsk, Nauka, 1986, p. 34), comprising a body and a drummer located therein. A drummer with a housing forms two working chambers. An axial distributor with channels for connecting the cavity with a source of compressed air, with channels for periodically connecting the working chambers either with a source of compressed air or with the atmosphere is located in the axial canapes of the hammer.

The disadvantage is the design complexity and, as a result, the lack of reliability due to the presence of a central air diffuser, fixed at both ends in the housing and having a system of channels for controlling cameras. The drummer – air distributor pair requires precise manufacturing and is prone to jamming during bending of the air distributor. The pedal is also the rear location of the duct, which makes it difficult to use the device as a shock unit when replacing pipelines.

A device is known according to the patent of the Russian Federation No. 2097493, comprising a housing, an impactor, front and rear working chambers, and two autonomous air distribution systems for each chamber. Systems are installed cantilever at the ends of the housing. This device can be used as a shock assembly both for driving pipes and for replacing pipes. The presence of two systems, cantilevered, can improve reliability (do not jam in the drummer).

A pedagogue is the exhaust at both ends of the device, which prevents its use for sinking wells, and when used as an impact unit for clogging pipes, it is necessary to make a special hole in the clogged pipe to exhaust the exhaust air.

The technical problem solved by this utility model is the expansion of functionality, increasing reliability and ease of use.

The problem is solved in that in a pneumatic impact device including a hollow body, a drummer located therein, an idle chamber and a stroke chamber formed by the inner surface of the body, the end face of the drummer and an air distributor installed in the drummer, made with channels for inlet of compressed air and exhaust exhaust air from the working chamber.

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an air supply pipe and an air duct, the idling chamber is formed by an air supply pipe, an air distributor and an inner surface of the striker, the idling chamber being constantly in communication with a source of compressed air. This allows you to increase reliability by simplifying the design - there is only one air distribution system.

It is advisable to make an air distributor with a through axial hole. This will allow you to connect the duct to both the air inlet pipe and the air distributor, thereby ensuring the possibility of using the device as a shock assembly for replacing pipelines with transfer of the hose for building up sections of the pipeline.

The proposed utility model is illustrated by drawings.

In FIG. 1 shows a device in longitudinal section, the air duct is connected to the air distributor, the air supply pipe is plugged.

In Fig.2 - the device in the context, the duct is connected to the air supply pipe, the air distributor is blocked.

The device comprises a zero body 1, in which a hollow striker 2 is arranged for reciprocating movement. In the striker 2 there is an air supply pipe 3 and an air distributor 4 forming an idle chamber 5. The air distributor 4 is made with channels 6 and 7, respectively, for compressed air inlet air into the chamber of the stroke 8 and for exhaust from it. According to Fig. 1, an air duct 9 is connected to the air diffuser 4, and the air supply pipe 3 is plugged with a plug 10. According to Fig. 2, the air duct 9 is connected to the air supply pipe 3, and the air distributor 4 is plugged with a plug 10.

The device operates as follows.

Compressed air through the duct 9 and the Central channel of the air distributor 4 is fed into the idle chamber 5 and, acting on the working area And the firing pin 2, moves the firing pin back (in figure 1 to the right); at the beginning of the movement, the channels 7 of the air distributor 4 communicate with the working chamber 8 with the atmosphere. After the channels 7 are closed with a bump 2, air compression in the working chamber 8 and braking of the hammer 2 will begin. Then, the idling chambers 5 and the working path 8 are sent through channel 7. The working area of the working chamber 8 is larger than the working area of the idling chamber 5 therefore, the drummer 2 stops, changing the direction of movement, accelerates and strikes the front (left in FIG. 1) end of the housing 1. Before the strike, the channels 6 are closed by the drummer 2, and the channels 7 open and air exhaust flows from the working chamber 8. D Lee cycle repeats.

when driving a well in the soil, a pointed ogolovnik is put on the front (left in Fig. 1) device to protect the muffled part of the air supply pipe 3 and the device is launched into the ground. It moves in the ground under the influence of impacts and leaves a well behind it. When pipes are clogged into the ground during trenchless laying of communications, the device with the front end through the adapter is connected to the rear end of the pipe to be clogged and hammered by impacts into the ground.

when using the device as a shock assembly for replacing pipes, the air distributor 4 is muffled, and the air duct 9 is connected to the air supply pipe 3, and the air distributor 4 is muffled (Fig. 2). The duct 9 is open, ayut in the old pipe. The corresponding structural elements (expander, extension cord, etc.) are put on the front of the device, which destroy the old pipe and the debris is pressed into the surrounding soil. A new pipe is attached to the rear end of the device, which is dragged into the place of the old one. Because the duct is located on the front side of the device, it does not impede the ability to freely build up new sections of the pipe being drawn as necessary. The principle of operation of the device in this case is similar to the previous version. Compressed air through the air supply pipe 3 is fed into the idle chamber 5, then everything is as in the previous embodiment.

The proposed design allows to obtain a device that is easy to manufacture and operate, allowing it to be used as a shock assembly for various types of construction work.

Claims (2)

1. A pneumatic shock device, comprising a hollow body, a hollow hammer placed therein, an idle chamber and a working chamber formed by the inner surface of the body, a hammer face and an air distributor installed in the hammer, made with channels for inlet and exhaust from the working chamber, an air supply pipe and an air duct, characterized in that the idle chamber is formed by an air inlet pipe, an air distributor and the inner surface of the striker, wherein the idle chamber is constantly communicated with a source of compressed air. 2. The pneumatic impact device according to claim 1, characterized in that the air distributor is made with a through axial hole.