SU1513138A1 - Percussive device - Google Patents

Abstract

The invention relates to the mining industry, namely to impact devices for breaking rocks. The purpose of the invention is to increase reliability by eliminating overloads of the device elements. The device includes a housing 1 and a hammer (U) 2, forming a platoon cavity 3 and an accumulating cavity 5. A leading tool (I) 6 is rigidly connected to the U 2. An expanding AND 7 is installed in the housing 1 with limited axial movement. smaller and A 6 is made with a length greater than the maximum distance between the end contacts of the surfaces Y 2 and expanding I 7. The cavity 5 is filled with compressed gas. The cavity 3 is communicated through the distributor 10 alternately with a pressure 11 and a drain 12 lines. At the end of the working stroke, And 6 strikes a rock. With a sufficient deepening of AND 6, the blow of the Y 2 is inflicted on the expanding And 7. 2 ill.

Description

f1

SP

with

00 00

the displacement is set to expanding and 7, stroke 2 is made smaller and i 6 is made of a length larger than the maximum distance between the end contact surfaces 2 and expanding and 7. cavity 5 is filled with compressed hectare

The invention relates to the mountain range, namely, to devices of impact action for the destruction of rocks.

The purpose of the invention is to increase the reliability of the device by eliminating the overload of its parts.

Figure 1 shows the structural diagram of the device at the end of the platoon process; figure 2 - the device in the initial position.

The device consists of a case I (Fig. 1), in the guides of which, with a possibility of reciprocating movement along the axis, a drummer 2 is installed with an end contact surface. The inner space of the housing 1 is divided into isolated from each other platoon 3 and drain 4 and an accumulating cavity 5 filled with gas by compression. The destructive tool consists of a retaining tool 6 rigidly connected to the drummer 2 and an expanding tool 7 installed in the housing 1 s the possibility of limited movement along the axis of the device. Cavity 3 by channel 8 and the cavity 4 by channel 9 are connected to the control device 10, to which pressure line 11 fits. The cavity 4 is connected by channel 12 permanently connected to the drain. The expansion tool 7 is fixed with the possibility of limited movement in the housing by means of a key 13, which is inserted into the groove 14 of the expansion tool 7.

The drummer 2 is made with a smaller stroke, and the leading tool is made with a length greater than the maximum distance between the end contact surfaces of the drummer 2 and the expansion tool, i.e. the relation is satisfied

1 i (A + h) S,

zom. The cavity 3 communicates via the distributor 10 alternately with the pressure II and drain 12 lines. At the end of the working stroke, And 6 strikes a rock. With a sufficient deepening of IL 6, the blow U 2 is applied over the expanding And 7. 2 ill.

five

five

0

0 5 0 5 0

five

where 1 is the length of the advanced instrument connected to the drummer; And - the distance between the end

the contact surface of the impactor and the inner end surface of the expansion tool at the end of the charging process;

h is the length of the groove; S - stroke drummer. The device works as follows.

In the initial state, under the action of gas pressure in the cavity 5, the striker 2 with the advancing tool 6 occupies the lowest position (Fig. 2). When fluid is supplied under pressure to the pressure line 1I, the control device 10 connects the pressure line 11 through the channel 8 s. cavity 3 platoon (figure 1). Under the action of fluid pressure in cavity 3, the impactor 2 with the opera- tion instrument 6, overcoming the gas pressure in cavity 5 of the accumulator, makes a platoon stroke, displacing the liquid from the cavity 4 to the tank through the duct 12. At the end of the platoon stroke line 11 from the cavity 3 of the platoon and connects it with the drain cavity 4.

As a result, the impactor 2 with the advancing tool 6, accelerating under the action of compressed gas in cavity 5, makes a working stroke, displaces the liquid from the platoon 3 through channels 8 and 9 into the drain cavity 4. At the end of the working stroke, the hammer 2 with the advancing tool 6 strikes the obstacle while the expanding tool 7 remains stationary, i.e. Initially, the major part of energy is spent on the formation of an advanced central recess, which creates favorable conditions for the subsequent destruction of matter515

The obstacles are an expanding tool 7. Thus, the central part of the bottom, for the formation of which the main part of the impact energy is expended, is destroyed by the throwing type of hammers, when the striker with the working tool accelerates and strikes the destructible object directly. If during the initial formation of the advance excavation, the entire impact energy is not expended, then the drummer 2 strikes the expansion tool 7 as it moves. If the entire impact energy is expended on the formation of the advanced excavation, then the next operation stroke strikes the extension tool 7. Thus, the destruction of the expansion part of the bottom is produced by the method of contact-type hammers, when the energy of the striker is transmitted through a fixed tool pressed against the object to be destroyed.

When a destructive tool is inserted, the body 1 of the percussion device is fed after the expansion tool 7, eliminating the gap between the lower end of the body and the expansion tool 7, thereby preparing the device for the next course of destruction

86

Since the diameter of the expansion tool 7 is slightly larger than the diameter of the lower part of the housing 1, then after the expansion tool 7, the hammer housing 1 is inserted, which allows increasing the depth of destruction without increasing the length of the expansion tool 7, i.e. no weight gain

last one.

Claims (1)

Invention Formula Percussion device including forming a platoon cavity with the case and accumulating an impactor with an end contact surface, a leading tool and installed in the case with the possibility of limited axial rotation an expanding tool with an end contact surface that, in order to improve the reliability of the device due to elimination of overloads of its elements, the advancing tool is rigidly connected to the drummer, and the drummer is made with a smaller stroke, and the advancing tool is made a length greater than the maximum between the face contact surfaces of the striker and the expansion tool. fie.g