CN114542539A - Reversing valve of rock drill - Google Patents
Reversing valve of rock drill Download PDFInfo
- Publication number
- CN114542539A CN114542539A CN202210219283.3A CN202210219283A CN114542539A CN 114542539 A CN114542539 A CN 114542539A CN 202210219283 A CN202210219283 A CN 202210219283A CN 114542539 A CN114542539 A CN 114542539A
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- valve core
- cavity
- pipeline
- piston
- reversing valve
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention relates to a rock drill reversing valve, comprising: the device comprises a cylinder body, a piston reciprocating in the cylinder body, a tubular reversing valve core reciprocating in the cylinder body, a left valve end cover used for guiding the left end of the tubular reversing valve core and a right valve end cover used for guiding the right end of the tubular reversing valve core; the left valve end cover and the right valve end cover are fixed to the cylinder body; a first piston cavity, a second piston cavity and a third piston cavity are formed between the piston and the cylinder body; a first valve core cavity, a second valve core cavity for oil supply and discharge, a third valve core cavity and a fourth valve core cavity for pressure oil pumping are formed between the tubular reversing valve core and the cylinder body; the cylinder body is formed with first pipeline, second pipeline, third pipeline, fourth pipeline and fifth pipeline. The invention has the beneficial effects that: a reversing valve of a rock drill reversing at high frequency and high speed is provided.
Description
Technical Field
The invention relates to the field of rock drill control, in particular to a high-frequency high-speed reversing valve of a rock drill.
Background
At present, the hydraulic rock drill is developed towards high-frequency high-speed reversing, higher requirements are put on the frequency of the hydraulic rock drill, the reversing of the reversing valve is restricted, the impact frequency of the rock drill is required to be improved, the problem of high-speed reversing of the rock drill is solved, and therefore the reversing frequency of the reversing valve is required to be improved.
Disclosure of Invention
The invention aims to provide a rock drill reversing valve to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a rock drill reversing valve comprising: the device comprises a cylinder body, a piston reciprocating in the cylinder body, a tubular reversing valve core reciprocating in the cylinder body, a left valve end cover used for guiding the left end of the tubular reversing valve core and a right valve end cover used for guiding the right end of the tubular reversing valve core; the left valve end cover and the right valve end cover are fixed to the cylinder body;
a first piston cavity, a second piston cavity and a third piston cavity are formed between the piston and the cylinder body; a first valve core cavity, a second valve core cavity for oil supply and discharge, a third valve core cavity and a fourth valve core cavity for pressure oil pumping are formed between the tubular reversing valve core and the cylinder body; the cylinder body is provided with a first pipeline, a second pipeline, a third pipeline, a fourth pipeline and a fifth pipeline; the cross-sectional area of the first pipeline is larger than that of the second pipeline;
the first pipeline is communicated with the first cavity of the piston and the third cavity of the valve core; the second pipeline is communicated with the third cavity of the piston and the fourth cavity of the valve core; the third pipeline is communicated to the second pipeline; the fourth pipeline is communicated with the second piston cavity and the first valve core cavity; the fifth pipeline is communicated to the second cavity of the valve core through a damping hole;
after pressure oil is pumped into the fourth cavity of the valve core, the tubular reversing valve core is pushed to move leftwards, so that the third cavity of the valve core is communicated with the fourth cavity of the valve core, and the piston is pushed to move rightwards under the action of the pressure oil entering the first cavity of the piston through the first pipeline as the sectional area of the first pipeline is larger than that of the second pipeline;
when the piston moves rightwards to a third pipeline to be communicated with a second cavity of the piston, pressure oil enters a first cavity of the valve core through a fourth pipeline, so that the tubular reversing valve core is pushed to move rightwards to enable a third cavity of the valve core to be communicated with an oil return cavity T and the third cavity of the valve core to be disconnected from and communicated with a fourth cavity of the valve core, and the piston moves leftwards under the action of pressure in the third cavity of the piston;
when the piston moves leftwards to the fifth pipeline to be communicated with the piston second cavity and the third pipeline is disconnected from the piston second cavity, the fifth pipeline is communicated with the valve core second cavity through the damping hole to form back pressure, the tubular reversing valve core moves leftwards to enable the valve core third cavity to be communicated with the valve core fourth cavity, pressure oil is fed into the piston first cavity and the piston third cavity to enable the piston to move rightwards to reduce the speed and brake, and after the tubular reversing valve core moves to the leftmost end, rotation-direction circulation is completed.
As a further scheme of the invention: the right end of the tubular reversing valve core is provided with a large cylinder end and a small cylinder end; the cross-sectional area of the large column end is larger than that of the small column end, so that a step surface is formed between the large column end and the small column end; a gap is formed between the step surface and the right valve end cover; the right valve end cover is provided with a sliding groove for the small cylinder end to insert and guide the tubular reversing valve core to slide.
As a further scheme of the invention: a guide hole is formed at the left end of the tubular reversing valve core; the left valve end cover is provided with a guide rod part which is inserted into the guide hole and guides the sliding of the tubular reversing valve core.
As a further scheme of the invention: the area of the end surface of the left end of the tubular reversing valve core is larger than that of the step surface.
As a further scheme of the invention: the tubular reversing valve core is provided with a central hole; the central hole and the guide hole are communicated with each other and penetrate through the tubular reversing valve core along the central line of the tubular reversing valve core.
As a further scheme of the invention: the center hole includes: large and small holes; the cross-sectional area of the large holes is larger than that of the small holes; the small hole is connected with the big hole and the guide hole; the right end of the tubular reversing valve core forms a big hole.
As a further scheme of the invention: the left valve end cover and the right valve end cover are both fixed to the cylinder body in a bolt connection mode.
As a further scheme of the invention: sealing rings are arranged between the left valve end cover and the cylinder body and between the right valve end cover and the cylinder body.
As a further scheme of the invention: the cylinder body is provided with an oil inlet channel communicated to the fourth cavity of the valve core and an oil outlet channel communicated to the second cavity of the valve core.
As a further scheme of the invention: the tubular reversing valve core is provided with a communicating hole which communicates the second cavity of the valve core with the interior of the tubular reversing valve core.
Compared with the prior art, the invention has the beneficial effects that: a reversing valve of a rock drill reversing at high frequency and high speed is provided.
Other features and advantages of the present invention will be disclosed in more detail in the following detailed description of the invention and the accompanying drawings.
Drawings
Fig. 1 is a schematic view of a rock drill reversing valve of the present invention;
fig. 2 is an enlarged view of the lower part of the rock drill reversing valve in fig. 1;
fig. 3 is a schematic view of another state of the rock drill reversing valve of fig. 1, showing a state in which a source of pressurized oil enters a fourth chamber of the spool to urge the spool to the left and the piston to the right;
fig. 4 is a schematic view of the rock drill reversing valve continuing to operate into another state in the state of fig. 3, showing the state in which the piston moves to a position where the third and fourth lines communicate via the second chamber of the piston, and the tube type reversing valve spool moves to the right;
fig. 5 is a schematic view of the continued operation of the reversing valve of the rock drill into another state in the state of fig. 4, showing the piston moving to the right to close the third conduit, and continued operation in the state of fig. 5 will return to the state of fig. 3;
fig. 6 is a schematic view of a spool type directional control valve of the rock drill directional control valve of fig. 1.
List of reference numerals: the rock drill reversing valve 100, the cylinder 10, the piston 20, the tubular reversing valve core 30, the large cylinder end 31, the small cylinder end 32, the guide hole 33, the large hole 341, the small hole 342, the communication hole 35, the left valve end cover 40, the guide rod part 41 and the right valve end cover 50;
a first pipeline 101, a second pipeline 102, a third pipeline 103, a fourth pipeline 104, a fifth pipeline 105, an oil inlet channel 106 and an oil outlet channel 107;
a piston first chamber 201, a piston second chamber 202, a piston third chamber 203;
a spool first chamber 301, a spool second chamber 302, a spool third chamber 303, and a spool fourth chamber 304.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 6, in an embodiment of the present invention, a rock drill reversing valve 100 includes: cylinder 10, piston 20, tubular direction changing valve core 30, left valve end cover 40 and right valve end cover 50.
The piston 20 reciprocates in the cylinder 10. The tube direction changing valve spool 30 reciprocates in the cylinder 10. As a specific embodiment, the direction of movement of the tube type direction change valve spool 30 within the cylinder 10 is parallel to the direction of movement of the piston 20 within the cylinder 10. The left valve end cap 40 is used to guide the left end of the tube diverter spool 30. The right valve end cap 50 is used to guide the right end of the tube diverter spool 30. The left and right valve end caps 40 and 50 are fixed to the cylinder 10.
The piston 20 and the cylinder 10 form a first piston chamber 201, a second piston chamber 202 and a third piston chamber 203. A first valve core cavity 301, a second valve core cavity 302 for supplying and discharging oil, a third valve core cavity 303 and a fourth valve core cavity 304 for pumping pressure oil are formed between the pipe type reversing valve core 30 and the cylinder body 10. As a specific embodiment, the cylinder 10 is formed with an oil inlet passage 106 communicating to the spool fourth chamber 304 and an oil outlet passage 107 communicating to the spool second chamber 302.
The cylinder 10 is formed with a first pipe 101, a second pipe 102, a third pipe 103, a fourth pipe 104, and a fifth pipe 105. The cross-sectional area of the first pipe 101 is larger than the cross-sectional area of the second pipe 102.
The first conduit 101 communicates the piston first chamber 201 with the spool third chamber 303. The second conduit 102 communicates between the piston third chamber 203 and the spool fourth chamber 304. The third line 103 is connected to the second line 102. The fourth line 104 communicates the piston second chamber 202 and the spool first chamber 301. The fifth line 105 communicates through a damping orifice to the spool second chamber 302. In the drawings, the first pipeline 101, the fourth pipeline 104 and the fifth pipeline 105 are crossed but do not indicate that the middle parts of the first pipeline 101, the fourth pipeline 104 and the fifth pipeline 105 are communicated. The first line 101, the fourth line 104 and the fifth line 105 are three separate lines.
In one embodiment, the right end of the tube diverter spool 30 is formed with a large cylinder end 31 and a small cylinder end 32. The cross-sectional area of the large cylinder end 31 is larger than the cross-sectional area of the small cylinder end 32 so that a step surface is formed between the large cylinder end 31 and the small cylinder end 32. A gap is provided between the step surface and the right valve end cap 50. The right valve end cap 50 is formed with a slide slot into which the small cylinder end 32 is inserted and guided to slide the tube type direction valve spool 30.
As a specific embodiment, the left end of the tube type direction changing valve core 30 is formed with a guide hole 33. The left valve cover 40 is formed with a guide rod portion 41 inserted into the guide hole 33 to guide the tube type direction switching valve body 30 to slide.
In a specific embodiment, the area of the end surface of the left end of the tube type direction changing valve core 30 is larger than the area of the step surface.
In one embodiment, the tubular diverter valve cartridge 30 is a hollow tubular body. Specifically, the tube type direction change spool 30 is formed with a center hole. The center hole and the guide hole 33 communicate with each other to penetrate the spool 30 along the center line of the spool 30. The center hole includes: large holes 341 and small holes 342. The cross-sectional area of the large holes 341 is larger than the cross-sectional area of the small holes 342. The small hole 342 connects the large hole 341 and the guide hole 33. The right end of the tube type direction changing valve core 30 is formed with a large hole 341. As a specific embodiment, the tube direction valve spool 30 is provided with a communication hole 35 communicating the spool second chamber 302 and the interior of the tube direction valve spool 30. The communication hole 35 is provided at a section corresponding to the small hole 342 and directly communicates with the small hole 342.
As a specific embodiment, the left and right valve end covers 40 and 50 are fixed to the cylinder block 10 by means of bolting. Sealing rings are arranged between the left valve end cover 40 and the cylinder body 10 and between the right valve end cover 50 and the cylinder body 10.
After the pressure oil is pumped into the valve core fourth cavity 304, the pipe type reversing valve core 30 is pushed to move leftwards, so that the valve core third cavity 303 is communicated with the valve core fourth cavity 304, and the piston 20 is pushed to move rightwards under the action of the pressure oil entering the piston first cavity 201 through the first pipeline 101 due to the fact that the cross-sectional area of the first pipeline 101 is larger than that of the second pipeline 102. At this time, the piston third chamber 203 is communicated to the piston first chamber 201 through the second pipeline 102, the valve core third chamber 303, the valve core fourth chamber 304 and the first pipeline 101; the piston third chamber 203 can thus enter the piston first chamber 201 together with the source of pressurized oil, causing the piston 20 to move rapidly to the right (refer to the position of fig. 3).
When the piston 20 moves to the right to connect the third pipeline 103 with the second piston chamber 202, the pressure oil enters the first spool chamber 301 via the fourth pipeline 104, so as to push the tube direction changing spool 30 to move to the right, so that the third spool chamber 303 is connected with the oil return chamber T, the third spool chamber 303 is disconnected from the fourth spool chamber 304 (refer to the position of fig. 4), and the piston 20 moves to the left under the pressure in the third piston chamber 203.
When the piston 20 moves to the left and the fifth pipeline 105 is communicated with the piston second chamber 202 and the third pipeline 103 is disconnected from the piston second chamber 202 (refer to the position of fig. 5), because the fifth pipeline 105 is communicated with the valve core second chamber 302 through the damping hole to form back pressure, the tube type reversing valve core 30 moves to the left and the valve core third chamber 303 is communicated with the valve core fourth chamber 304, at the moment, the pressure oil is filled in the piston first chamber 201 and the piston third chamber 203 to enable the piston 20 to move to the right for deceleration braking, and when the tube type reversing valve core 30 moves to the leftmost end, a rotation cycle is completed. The oil is distributed through the tubular reversing valve core 30, and the high-frequency high-speed motion is realized through the repeated circulation.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (10)
1. A rock drill reversing valve, comprising: the piston reciprocates in the cylinder body, the tubular reversing valve core reciprocates in the cylinder body, a left valve end cover used for guiding the left end of the tubular reversing valve core and a right valve end cover used for guiding the right end of the tubular reversing valve core; the left and right valve end caps are fixed to the cylinder block;
a first piston cavity, a second piston cavity and a third piston cavity are formed between the piston and the cylinder body; a first valve core cavity, a second valve core cavity for oil supply and discharge, a third valve core cavity and a fourth valve core cavity for pressure oil pumping are formed between the tubular reversing valve core and the cylinder body; the cylinder body is provided with a first pipeline, a second pipeline, a third pipeline, a fourth pipeline and a fifth pipeline; the cross-sectional area of the first pipeline is larger than that of the second pipeline;
the first pipeline is communicated with the first piston cavity and the third valve core cavity; the second pipeline is communicated with the piston third cavity and the valve core fourth cavity; the third pipeline is communicated to the second pipeline; the fourth pipeline is communicated with the second piston cavity and the first valve core cavity; the fifth pipeline is communicated to the second cavity of the valve core through a damping hole;
after pressure oil is pumped into the valve core fourth cavity, the tubular reversing valve core is pushed to move leftwards, so that the valve core third cavity is communicated with the valve core fourth cavity, and the piston is pushed to move rightwards under the action of the pressure oil entering the piston first cavity through the first pipeline due to the fact that the cross-sectional area of the first pipeline is larger than that of the second pipeline;
when the piston moves rightwards to the third pipeline to be communicated with the second piston cavity, pressure oil enters the first valve core cavity through the fourth pipeline, so that the tubular reversing valve core is pushed to move rightwards to enable the third valve core cavity to be communicated with the oil return cavity T and the third valve core cavity to be disconnected from the fourth valve core cavity, and the piston moves leftwards under the action of pressure in the third piston cavity;
when the piston moves leftwards to the fifth pipeline and is communicated with the piston second cavity and the third pipeline is disconnected from the piston second cavity, the fifth pipeline is communicated with the valve core second cavity through the damping hole to form back pressure, the tubular reversing valve core moves leftwards to enable the valve core third cavity and the valve core fourth cavity to be communicated, pressure oil is fed into the piston first cavity and the piston third cavity to enable the piston to move rightwards for deceleration braking, and when the tubular reversing valve core moves to the leftmost end, a rotation cycle is completed.
2. A rock drill reversing valve according to claim 1,
the right end of the tubular reversing valve core is provided with a large cylinder end and a small cylinder end; the cross-sectional area of the large cylinder end is larger than that of the small cylinder end so that a step surface is formed between the large cylinder end and the small cylinder end; a gap is formed between the step surface and the right valve end cover; and the right valve end cover is provided with a sliding groove for the small cylinder end to be inserted into and guide the tubular reversing valve core to slide.
3. A rock drill reversing valve according to claim 2,
a guide hole is formed at the left end of the tubular reversing valve core; and the left valve end cover is provided with a guide rod part which is inserted into the guide hole and guides the tubular reversing valve core to slide.
4. A rock drill reversing valve according to claim 3,
the area of the end face of the left end of the tubular reversing valve core is larger than that of the step face.
5. A rock drill reversing valve according to claim 3,
the tubular reversing valve core is provided with a central hole; the central hole and the guide hole are communicated with each other and penetrate through the tubular reversing valve core along the central line of the tubular reversing valve core.
6. A rock drill reversing valve according to claim 5,
the central hole includes: large and small holes; the cross-sectional area of the large holes is larger than that of the small holes; the small hole is connected with the large hole and the guide hole; the right end of the tubular reversing valve core forms the big hole.
7. A rock drill reversing valve according to claim 1,
the left valve end cover and the right valve end cover are fixed to the cylinder body in a bolt connection mode.
8. A rock drill reversing valve according to claim 7,
and sealing rings are arranged between the left valve end cover and the cylinder body and between the right valve end cover and the cylinder body.
9. A rock drill reversing valve according to claim 1,
the cylinder body is provided with an oil inlet channel communicated to the fourth cavity of the valve core and an oil outlet channel communicated to the second cavity of the valve core.
10. A rock drill reversing valve according to claim 1,
the tubular reversing valve core is provided with a communicating hole which communicates the second cavity of the valve core with the interior of the tubular reversing valve core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210219283.3A CN114542539A (en) | 2022-03-08 | 2022-03-08 | Reversing valve of rock drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210219283.3A CN114542539A (en) | 2022-03-08 | 2022-03-08 | Reversing valve of rock drill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114542539A true CN114542539A (en) | 2022-05-27 |
Family
ID=81663829
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210219283.3A Pending CN114542539A (en) | 2022-03-08 | 2022-03-08 | Reversing valve of rock drill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114542539A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118030644A (en) * | 2024-04-15 | 2024-05-14 | 烟台乐匠液压机械有限公司 | Stamping structure with high-sensitivity reversing valve core |
-
2022
- 2022-03-08 CN CN202210219283.3A patent/CN114542539A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118030644A (en) * | 2024-04-15 | 2024-05-14 | 烟台乐匠液压机械有限公司 | Stamping structure with high-sensitivity reversing valve core |
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