CN214742428U - Rotary confluence hydraulic system of rock drilling machine - Google Patents
Rotary confluence hydraulic system of rock drilling machine Download PDFInfo
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- CN214742428U CN214742428U CN202120868203.8U CN202120868203U CN214742428U CN 214742428 U CN214742428 U CN 214742428U CN 202120868203 U CN202120868203 U CN 202120868203U CN 214742428 U CN214742428 U CN 214742428U
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Abstract
The utility model discloses a rock drilling machine gyration confluence hydraulic system belongs to rock drilling machine hydraulic pressure technical field. The hydraulic control system comprises a rotary hydraulic control part, a propulsion hydraulic control part and a sequence valve; the hydraulic control part comprises a rotary motor, and the hydraulic control part comprises a propulsion reversing control valve and a propulsion motor; the inlet oil of the sequence valve is connected with one oil way of the propulsion motor in the propulsion hydraulic control part, and the oil outlet is connected with one oil way of the rotary motor in the rotary hydraulic control part, so that when the rock drill is drilled, pressure oil of the propulsion hydraulic control part can flow to the rotary hydraulic control part through the sequence valve. The utility model discloses can supply with the unnecessary hydraulic oil of propulsion hydraulic control part and turn round hydraulic control part, satisfy the specific demand of drilling work, can improve the hydraulic oil utilization ratio, reduce energy loss can reduce the discharge capacity of gyration hydraulic pump in the gyration hydraulic control part again.
Description
Technical Field
The utility model belongs to the technical field of the hydraulic control of rock drilling, more specifically say, relate to a rock drilling machine gyration confluence hydraulic system.
Background
Rock drills are tools used to directly mine rock material and drill blastholes into rock formations to deposit explosives to blast the rock and thereby complete the mine of rock material or other rock work. Furthermore, rock drills may also be used as breakers for breaking hard layers such as concrete. Rock drills can be classified into pneumatic rock drills, internal combustion rock drills, electric rock drills, hydraulic rock drills and the like according to power sources of the rock drills.
The rock drilling machine has two main operations, namely, the rotation of a drill rod, and the propulsion and the lifting of the drill rod, which are driven by a hydraulic motor. The existing rock drilling machine generally adopts two hydraulic pumps to respectively supply oil to a rotary motor and a propulsion motor. The drilling machine requires fast propelling and lifting speed when connecting and disconnecting a drill rod or washing a hole, and requires slow propelling speed when drilling a hole, so that hydraulic pumps for supplying oil to a propelling motor are large in selection, and the propelling and lifting speed must be ensured to be fast; but the propelling speed is required to be very slow when drilling, and the propelling motor only needs little hydraulic oil flow, so that most of hydraulic oil output by the pump overflows from the overflow valve and returns to the oil tank, the working efficiency is low, and energy is wasted.
The prior art improvements relating to hydraulic systems for rock drills have primarily focused on controlling the rock drilling thrust, for example, chinese patent application nos.: 201420644205.9, publication date is: the utility model discloses a rock drill gyration propulsion electricity liquid control circuit is disclosed in 2015 year 5 month 6 days. According to the scheme, the rock drilling propelling pressure is remotely controlled through a hydraulic electric proportional overflow valve, the rotary pressure is detected through a pressure sensor and is input into a controller, a rotary pressure detection signal is used as an input signal controlled by a controller program, the pressure characteristic of the electric proportional overflow valve is controlled through a controller output signal, the relation between the controller input signal and the controller output signal is programmed according to the controller program, the controller program is programmed according to the requirement of the rock drilling machine for controlling the propelling working condition in a rotary control mode, the programmed control of the rock drilling machine for propelling is realized, and the control characteristic is flexible. The core of the scheme is that the controller receives rotary pressure to control the propelling pressure so as to adapt to the requirements of different rock hardness on different propelling forces, however, redundant hydraulic oil of the propelling motor still overflows from the overflow valve, and the utilization rate of the pressure oil is not high.
Disclosure of Invention
1. Problems to be solved
The utility model provides a rock drill gyration confluence hydraulic system, its aim at rock drill drilling during operation, the lower problem of propulsion motor pressure oil utilization rate.
2. Technical scheme
In order to solve the problem, the utility model provides a pair of rock drill gyration confluence hydraulic system, the technical scheme who adopts as follows:
a rock drilling machine rotary confluence hydraulic system comprises a rotary hydraulic control part, a propulsion hydraulic control part and a sequence valve; the hydraulic control part comprises a rotary motor, and the hydraulic control part comprises a propulsion reversing control valve and a propulsion motor; the inlet oil of the sequence valve is connected with one oil way of the propulsion motor in the propulsion hydraulic control part, and the oil outlet is connected with one oil way of the rotary motor in the rotary hydraulic control part, so that when the rock drill is drilled, pressure oil of the propulsion hydraulic control part can flow to the rotary hydraulic control part through the sequence valve.
This scheme rock drill is when drilling operation, slew velocity is very fast relatively, it is great relatively to the hydraulic oil flow, propulsion speed is very slow relatively, required hydraulic oil flow is less, will revolve the hydraulic control part through the sequence valve and impel and bridge between the hydraulic control part and the two, can supply the hydraulic control part that revolves with impel the unnecessary hydraulic oil of hydraulic control part supplyes, satisfy the specific demand of drilling work, can improve the hydraulic oil utilization ratio, reduce the energy loss, can reduce the discharge capacity of gyration hydraulic pump in the gyration hydraulic control part again.
Considering the opening pressure of the sequence valve, a pilot sequence valve or a straight-through sequence valve can be selected, the pilot sequence valve is preferred, the opening pressure can be adjusted according to different requirements, and the adaptability is high.
On the basis of the scheme, a pressure reducing valve is further installed on a pipeline between an oil outlet of the propulsion reversing control valve and an oil outlet of the propulsion motor, and the opening direction of the pressure reducing valve points to the propulsion motor from the propulsion reversing control valve. The design of the existing overflow valve is replaced by the pressure reducing valve, redundant hydraulic oil of the propulsion hydraulic control part cannot flow back to the oil tank, and only the redundant hydraulic oil is supplied to the rotation hydraulic control part through the sequence valve, so that the pressure oil is utilized to the maximum extent, and the energy loss is reduced.
Considering the sequence of the work of the rotary hydraulic control part and the propulsion hydraulic control part, the working pressure of the sequence valve and the pressure reducing valve has difference, the opening pressure of the sequence valve is larger than the outlet pressure of the pressure reducing valve, and the hydraulic oil is supplied to the rotary motor on the premise that the propulsion motor has enough pressure to work. In the scheme, the opening pressure of the sequence valve is not less than 8MPa, and the outlet pressure of the reducing valve is 5-7MPa, so that the working requirement can be met generally.
In a word, the utility model discloses rock drill gyration confluence hydraulic system both can guarantee the low-speed requirement of advancing speed when rock drill drilling, can improve slew velocity again for drilling efficiency increases, has still avoided the energy extravagant simultaneously, improves hydraulic power utilization ratio.
Drawings
Figure 1 is a schematic diagram of a prior art hydraulic system for propulsion and swing control of a rock drill rig;
fig. 2 is a schematic diagram of a hydraulic system for propulsion and rotation control of the rock drilling rig according to the present invention;
in the figure: 1. a rotary hydraulic pump; 2. a propulsion hydraulic pump; 3. a rotary reversing control valve; 4. a propulsion reversing control valve; 5. a rotary motor; 6. a propulsion motor; 7. an overflow valve; 8. a sequence valve; 9. a pressure reducing valve.
Detailed Description
The present invention will be further described with reference to the following specific embodiments.
Examples
Fig. 1 shows a schematic diagram of a general conventional hydraulic system for propulsion and rotation control of a rock drilling machine, which mainly comprises a rotation hydraulic control part and a propulsion hydraulic control part, wherein the rotation hydraulic control part is used for controlling the rotation action of a drill rod of the rock drilling machine, the propulsion hydraulic control part is used for controlling the propulsion and lifting work of the drill rod of the rock drilling machine, and the two parts are independent from each other and are respectively and independently provided with hydraulic power by a hydraulic pump.
Specifically, the rotary hydraulic control part comprises a rotary hydraulic pump 1, a rotary reversing control valve 3 and a rotary motor 5, wherein the rotary hydraulic pump 1 is used as a hydraulic power source and provides pressure oil for the rotary motor 5 to rotate, and the rotary reversing control valve 3 controls the direction of the pressure oil entering the rotary motor 5 and controls the rotation direction of the rotary motor 5. The propelling hydraulic control part comprises a propelling hydraulic pump 2, a propelling reversing control valve 4, a propelling motor 6 and an overflow valve 7, the propelling hydraulic pump 2 provides hydraulic power required by work for the propelling motor 6, the propelling reversing control valve 4 controls the rotation direction of the propelling motor 6, the overflow valve 7 controls the working pressure of the propelling motor 6, and when the pressure exceeds the set working pressure, redundant hydraulic oil can overflow from the overflow valve 7 to an oil tank.
The rock drill is in different working modes, the working requirements on the rotary hydraulic control part and the propelling hydraulic control part are different, the propelling and lifting speed of the rock drill is required to be high when the drill is connected or disconnected or a drill hole is washed, and the propelling speed is required to be low when the drill hole is drilled, so that the propelling hydraulic pumps 2 for supplying oil to the propelling motor 6 are large in selection under the general condition, and the propelling and lifting can reach high speed; but the propelling speed is required to be very slow when drilling, only a small amount of hydraulic oil flow is needed, and by adopting the general hydraulic system, the adoption of the large-flow propelling hydraulic pump 2 can cause most of hydraulic oil output by the pump to overflow from the overflow valve and return to the oil tank, so that the working efficiency is low, and energy is wasted.
Therefore, the rotary confluence hydraulic system of the rock drilling machine is provided, a rotary hydraulic control part and a propulsion hydraulic control part are jointly controlled, and the aim of effectively providing the utilization rate of hydraulic oil is achieved. As shown in fig. 2 in particular, the main structures of the swing hydraulic control portion and the propulsion hydraulic control portion are not changed basically, but the two portions are related through a sequence valve 8. The inlet of the sequence valve 8 is connected with an oil path of the propulsion motor 6 in the propulsion hydraulic control part, and the oil outlet is connected with an oil path of the rotary motor 5 in the rotary hydraulic control part, so that when the rock drill is drilled, pressure oil in the propulsion hydraulic control part can flow to the rotary hydraulic control part through the sequence valve 8.
This scheme rock drill is when drilling operation, slew velocity is very fast relatively, it is great relatively to the hydraulic oil flow, propulsion speed is very slow relatively, required hydraulic oil flow is less, through sequence valve 8 with gyration hydraulic control part and impel the hydraulic control part bridge between the two, can supply the gyration hydraulic control part with impel the unnecessary hydraulic oil of hydraulic control part supplyes, satisfy the specific demand of drilling work, can improve the hydraulic oil utilization ratio, reduce the energy loss, can reduce the discharge capacity of gyration hydraulic pump 1 in the gyration hydraulic control part again.
Considering the opening pressure of the sequence valve 8, a pilot sequence valve or a straight-through sequence valve can be selected, preferably the pilot sequence valve, the opening pressure can be adjusted according to different requirements, and the adaptability is high.
On the basis of the scheme, an existing overflow valve is removed from a pipeline between an oil outlet of the propulsion reversing control valve 4 and an oil outlet of the propulsion motor 6, a pressure reducing valve 9 is installed instead, and the opening direction of the pressure reducing valve 9 is pointed to the propulsion motor 6 by the propulsion reversing control valve 4. The design of the existing overflow valve is replaced by the pressure reducing valve 9, redundant hydraulic oil of the propulsion hydraulic control part cannot flow back to the oil tank, and only the redundant hydraulic oil is supplemented to the rotation hydraulic control part through the sequence valve 8, so that the pressure oil is utilized to the maximum extent, and the energy loss is reduced.
Considering the sequence of the work of the rotary hydraulic control part and the propulsion hydraulic control part, the working pressure of the sequence valve 8 and the pressure reducing valve 9 has difference, the opening pressure of the sequence valve 8 is larger than the outlet pressure of the pressure reducing valve 9, and on the premise that the propulsion motor 6 has enough pressure to work, the hydraulic oil is supplied to the rotary motor 5. In the scheme, the opening pressure of the sequence valve 8 is not less than 8MPa, and the outlet pressure of the reducing valve 9 is 5-7MPa, so that the working requirement can be met.
In a word, this scheme drilling machine gyration confluence hydraulic system both can guarantee the low-speed requirement of advancing speed when drilling by the drilling machine, can improve slew velocity again for drilling efficiency increases, has still avoided the energy extravagant simultaneously, improves hydraulic power utilization ratio.
The present invention and its embodiments have been described above schematically, and the description is not limited thereto, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching of the present invention, without departing from the inventive spirit of the present invention, the person skilled in the art should also design the similar structural modes and embodiments without creativity to the technical solution, and all shall fall within the protection scope of the present invention.
Claims (5)
1. A rock drilling machine rotary confluence hydraulic system comprises a rotary hydraulic control part and a propulsion hydraulic control part; the rotary hydraulic control part comprises a rotary motor (5), the propelling hydraulic control part comprises a propelling reversing control valve (4) and a propelling motor (6), and the rotary hydraulic control part is characterized in that: also comprises a sequence valve (8); and the inlet of the sequence valve (8) is connected with an oil way of a propulsion motor (6) in the propulsion hydraulic control part, and the oil outlet is connected with an oil way of a rotary motor (5) in the rotary hydraulic control part, so that when the rock drilling machine works, pressure oil in the propulsion hydraulic control part can flow to the rotary hydraulic control part through the sequence valve (8).
2. A rock drill rotary converging hydraulic system as claimed in claim 1, characterized in that: the sequence valve (8) adopts a pilot sequence valve or a straight-through sequence valve.
3. A rock drill rotary converging hydraulic system according to claim 1 or 2, characterized in that: a pressure reducing valve (9) is mounted on a pipeline between an oil outlet of the propulsion reversing control valve (4) and an oil outlet of the propulsion motor (6), and the opening direction of the pressure reducing valve (9) is directed to the propulsion motor (6) from the propulsion reversing control valve (4).
4. A rock drill rotary converging hydraulic system as claimed in claim 3, characterized in that: the opening pressure of the sequence valve (8) is greater than the outlet pressure of the pressure reducing valve (9).
5. A rock drill rig rotary merge hydraulic system as claimed in claim 4, wherein: the opening pressure of the sequence valve (8) is not less than 8MPa, and the outlet pressure of the reducing valve (9) is 5-7 MPa.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120868203.8U CN214742428U (en) | 2021-04-25 | 2021-04-25 | Rotary confluence hydraulic system of rock drilling machine |
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| CN202120868203.8U CN214742428U (en) | 2021-04-25 | 2021-04-25 | Rotary confluence hydraulic system of rock drilling machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114412869A (en) * | 2022-01-27 | 2022-04-29 | 湖南三一中型起重机械有限公司 | Operating valve block, emergency hydraulic control system and operating machine |
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2021
- 2021-04-25 CN CN202120868203.8U patent/CN214742428U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114412869A (en) * | 2022-01-27 | 2022-04-29 | 湖南三一中型起重机械有限公司 | Operating valve block, emergency hydraulic control system and operating machine |
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