Anti-air impact hydraulic system and control method of rock drill

Abstract

The invention discloses an anti-air impact hydraulic system and a control method for a rock drill. It comprises a hydraulic pump station, the hydraulic pump station is connected with a forward feed oil pipe and a reverse feed oil pipe through a feed reversing valve; The shock reversing valve is connected with the shock oil pipe and the low pressure shock oil pipe; a first hydraulic control reversing valve is installed on the oil circuit behind the shock oil pipe, and the hydraulic control end of the first hydraulic control reversing valve passes through the first hydraulic control oil pipe Connected with the forward feed oil pipe, the first hydraulic control reversing valve is connected with the impact oil cylinder; the forward feed oil pipe is connected with the feed oil cylinder through the first reversing valve and the second reversing valve. The hydraulic system controls the impact of the rock drill by the size of the feed pressure, so as to ensure that the rock drill will not run dry, prolong the service life of the equipment and reduce the energy loss.

Description

technical field

[0001] The invention belongs to the field of rock drilling equipment, and in particular relates to a hydraulic system and a control method for anti-air impact of rock drilling machines. Background technique

[0002] At present, the impact and feed systems of most rock drills on the market are independent of each other, and independent hydraulic control systems are used respectively, so there are the following defects: when the impact drill bit does not contact the rock layer or the contact force is not enough or there is no normal feeding When the impact control handle is pushed, the impact action of the rock drill will be turned on, which will cause the rock drill to run empty, that is, the impact at this time is doing useless work and has no effect on the rock drilling; Very large damage, shorten the service life of the rock drill, increase the construction cost; and also cause the loss of kinetic energy. SUMMARY OF THE INVENTION

[0003] The purpose of ...

Examples

Embodiment 1

[0025] like figure 1 As shown, the anti-aircraft impact hydraulic system of a rock drill includes a hydraulic pump station 1, which is connected with a forward feed oil pipe 5 and a reverse feed oil pipe 4 through a feed reversing valve 2; the hydraulic pump station 1 is connected to the shock oil pipe 7 and the low pressure shock oil pipe 6 through the shock reversing valve 3; a first hydraulic control reversing valve 12 is installed on the oil circuit after the shock oil pipe 7, and the liquid of the first hydraulic control reversing valve 12 is installed. The control end is connected to the forward feed oil pipe 5 through the first hydraulic control oil pipe 8, and the first hydraulic control reversing valve 12 is connected to the impact oil cylinder 13; The second reversing valve 16 is connected to the feed cylinder 17 . During the working process, the feeding pressure of the feeding cylinder 17 will be fed back to the shock oil pipe 7 at the same time. By connecting the ...

Embodiment 2

[0032] A control method for the anti-aircraft impact hydraulic system of the rock drill, which comprises the following steps:

[0033] 1) Set the opening pressure of the first hydraulic control reversing valve 12 and the second hydraulic control reversing valve 9, and keep their opening pressures consistent;

[0034] 2) Open the forward feed pipe 5 and start the feed cylinder 17;

[0035] 3) When the rock drill has not been in contact with the rock formation or because of the holes and softness of the rock formation, the pressure of the forward feeding oil pipe 5 is very small. At this time, the pressure of the forward feeding oil pipe 5 is smaller than that of the first hydraulic control valve 12 When the opening pressure is increased, the first hydraulic control reversing valve 12 will not change direction, and the hydraulic oil impacting the oil pipe 7 will directly return to the oil tank through the first hydraulic control reversing valve 12, and the rock drill will not ha...

technical field

[0001] The invention belongs to the field of rock drilling equipment, and in particular relates to a hydraulic system and a control method for anti-air impact of rock drilling machines. Background technique

[0002] At present, the impact and feed systems of most rock drills on the market are independent of each other, and independent hydraulic control systems are used respectively, so there are the following defects: when the impact drill bit does not contact the rock layer or the contact force is not enough or there is no normal feeding When the impact control handle is pushed, the impact action of the rock drill will be turned on, which will cause the rock drill to run empty, that is, the impact at this time is doing useless work and has no effect on the rock drilling; Very large damage, shorten the service life of the rock drill, increase the construction cost; and also cause the loss of kinetic energy. SUMMARY OF THE INVENTION

[0003] The purpose of ...

Examples

Embodiment 1

[0025] like figure 1 As shown, the anti-aircraft impact hydraulic system of a rock drill includes a hydraulic pump station 1, which is connected with a forward feed oil pipe 5 and a reverse feed oil pipe 4 through a feed reversing valve 2; the hydraulic pump station 1 is connected to the shock oil pipe 7 and the low pressure shock oil pipe 6 through the shock reversing valve 3; a first hydraulic control reversing valve 12 is installed on the oil circuit after the shock oil pipe 7, and the liquid of the first hydraulic control reversing valve 12 is installed. The control end is connected to the forward feed oil pipe 5 through the first hydraulic control oil pipe 8, and the first hydraulic control reversing valve 12 is connected to the impact oil cylinder 13; The second reversing valve 16 is connected to the feed cylinder 17 . During the working process, the feeding pressure of the feeding cylinder 17 will be fed back to the shock oil pipe 7 at the same time. By connecting the ...

Embodiment 2

[0032] A control method for the anti-aircraft impact hydraulic system of the rock drill, which comprises the following steps:

[0033] 1) Set the opening pressure of the first hydraulic control reversing valve 12 and the second hydraulic control reversing valve 9, and keep their opening pressures consistent;

[0034] 2) Open the forward feed pipe 5 and start the feed cylinder 17;

[0035] 3) When the rock drill has not been in contact with the rock formation or because of the holes and softness of the rock formation, the pressure of the forward feeding oil pipe 5 is very small. At this time, the pressure of the forward feeding oil pipe 5 is smaller than that of the first hydraulic control valve 12 When the opening pressure is increased, the first hydraulic control reversing valve 12 will not change direction, and the hydraulic oil impacting the oil pipe 7 will directly return to the oil tank through the first hydraulic control reversing valve 12, and the rock drill will not ha...

Images