CN215257069U - Reversing valve for hydraulic rock drill - Google Patents
Reversing valve for hydraulic rock drill Download PDFInfo
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- CN215257069U CN215257069U CN202121475577.XU CN202121475577U CN215257069U CN 215257069 U CN215257069 U CN 215257069U CN 202121475577 U CN202121475577 U CN 202121475577U CN 215257069 U CN215257069 U CN 215257069U
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- reversing valve
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- valve core
- impact piston
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Abstract
The utility model discloses a hydraulic pressure is switching-over valve for rock drill, it includes: the device comprises a reversing valve sleeve, a reversing valve core, an impact cylinder sleeve and an impact piston; the reversing valve sleeve and the impact cylinder sleeve are communicated through an oil pipe to form a circulation space. The reversing valve core can reciprocate in the reversing valve sleeve along the central axis, the impact piston can also reciprocate in the impact cylinder sleeve along the central axis, and when the reversing valve core moves towards one end, the hydraulic state in the impact cylinder sleeve can be changed, so that the movement direction of the impact piston is changed; when the motion direction of the impact piston changes, the hydraulic state in the reversing valve sleeve is reversely changed, so that the motion direction of the reversing valve core is changed, the two reciprocating motion are mutually influenced, and the opposite direction is triggered by the motion of the two reciprocating motion, so that the linkage is realized. For current steering valve for hydraulic rock drill, the utility model discloses need not additionally to provide power for the steering valve, and the direction control of steering valve is closely related with the motion state of assaulting the piston, can effectively guarantee the synchronism.
Description
Technical Field
The utility model mainly relates to a hydraulic pressure switching-over technical field especially relates to a reversing valve for hydraulic pressure rock drill.
Background
The hydraulic rock drill is a rock drill machine which uses high-pressure oil as power to drive a piston to impact a drill rod and is provided with an independent swing mechanism. The hydraulic rock drill controls the piston to reciprocate, and drives the drill rod to repeatedly impact the rock so as to realize the cutting function of the rock drill. The oil pressure is higher than the air pressure, and the working efficiency is higher as the oil pressure is higher than the air pressure and can reach more than 10 MPa. Although the hydraulic rock drill is similar to the pneumatic rock drill, the piston has smaller diameter, larger length and better waveform, thereby having the characteristics of high drilling speed, high impact power, large torque, high frequency and the like.
The existing reversing valve for the hydraulic rock drill needs to be driven independently, and the reversing valve cannot be linked with an impact piston, so that the synchronism is poor.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a main objective is overcome not enough among the above-mentioned prior art to solve the unable problem that forms the linkage with the impact piston of switching-over valve for current hydraulic pressure rock drill.
In order to achieve the above object, the utility model discloses a reversing valve for hydraulic pressure rock drill, include: the device comprises a reversing valve sleeve, a reversing valve core, an impact cylinder sleeve and an impact piston;
the reversing valve core is installed in the inner cavity of the reversing valve sleeve, the impact piston is installed in the inner cavity of the impact cylinder sleeve, and the inner cavity of the reversing valve sleeve is communicated with the inner cavity of the impact cylinder sleeve through an oil pipe;
the hydraulic oil pushes the reversing valve core and the impact piston to reciprocate, and when the reversing valve core moves leftwards for a preset distance, the hydraulic oil pushes the impact piston to advance; when the impact piston advances for a preset distance, the hydraulic oil pushes the reversing valve core to move right; when the reversing valve core moves to the right for a preset distance, the hydraulic oil pushes the impact piston to retreat; when the impact piston retreats for a preset distance, hydraulic oil pushes the reversing valve core to move left, and the operation is repeated in a circulating mode.
As a further improvement of the above technical solution:
the reversing valve sleeve and the reversing valve core jointly enclose an alternating cavity and a signal cavity, when the reversing valve core moves to the left for a preset distance, high-pressure oil is injected into the alternating cavity, and when the reversing valve core moves to the right for a preset distance, low-pressure oil is injected into the alternating cavity;
the reversing valve core is provided with a first signal boss matched with the signal cavity, and when high-pressure oil enters the signal cavity, the high-pressure oil pushes the reversing valve core to move left through the first signal boss; and conversely, the reversing valve core moves rightwards.
The impact cylinder sleeve and the impact piston jointly enclose a front cavity and a rear cavity, when the impact piston moves forward for a preset distance, low-pressure oil is injected into the front cavity, and when the impact piston moves backward for a preset distance, high-pressure oil is injected into the front cavity;
and a second signal boss matched with the rear cavity is formed on the impact piston, when high-pressure oil enters the rear cavity, the high-pressure oil pushes the impact piston to advance through the second signal boss, otherwise, the impact piston retreats.
The front cavity is communicated with the signal cavity, and the rear cavity is communicated with the alternate cavity.
The reversing valve comprises a reversing valve sleeve, a reversing valve core and a reversing valve sleeve, wherein the reversing valve sleeve is arranged in the reversing valve sleeve, the reversing valve core is arranged in the reversing valve sleeve, and the reversing valve sleeve is arranged in the reversing valve sleeve.
Low-pressure oil is introduced into the low-pressure cavity and is positioned on the left side of the alternating cavity; high-pressure oil is introduced into the high-pressure cavity and is positioned on the right side of the alternating cavity;
and through the reciprocating motion of the reversing valve core, the alternating cavities are alternately communicated with the high-pressure cavity or the low-pressure cavity.
The reversing valve core is of a hollow structure; and the inner cavity of the reversing valve core is connected with the high-pressure cavity.
A high-pressure groove and a low-pressure groove are formed in the inner wall of the impact cylinder sleeve, and high-pressure oil is introduced into the high-pressure groove and is positioned on the front side of the front cavity; and low-pressure oil is introduced into the low-pressure groove and is positioned at the rear side of the front cavity.
An annular groove is formed in the outer surface of the impact piston, and the annular groove can communicate the front cavity with the low-pressure groove through movement of the impact piston.
Compared with the prior art, the utility model has the advantages of:
a circulating space is formed by arranging a reversing valve sleeve and an impact cylinder sleeve which are communicated through an oil pipe. The reversing valve core can reciprocate in the reversing valve sleeve along the central axis, the impact piston can also reciprocate in the impact cylinder sleeve along the central axis, and when the reversing valve core moves towards one end, the hydraulic state in the impact cylinder sleeve can be changed, so that the movement direction of the impact piston is changed; when the motion direction of the impact piston changes, the hydraulic state in the reversing valve sleeve is reversely changed, so that the motion direction of the reversing valve core is changed, the two reciprocating motion are mutually influenced, and the opposite direction is triggered by the motion of the two reciprocating motion, so that the linkage is realized. For current steering valve for hydraulic rock drill, the utility model discloses need not additionally to provide power for the steering valve, and the direction control of steering valve is closely related with the motion state of assaulting the piston, can effectively guarantee the synchronism.
Drawings
Fig. 1 is a schematic view in partial section of a hydraulic rock drill;
fig. 2 is a schematic sectional view taken along line H-H of fig. 1.
The reference numerals in the figures denote: 11. a reversing valve sleeve; 111. an inner collar; 12. a reversing valve core; 121. a first signal boss; 122. an outer convex ring; 13. alternating chambers; 14. a signal cavity; 15. a high pressure chamber; 16. a low pressure chamber; 21. impacting the cylinder sleeve; 211. a high pressure tank; 212. a low pressure tank; 22. an impact piston; 221. a second signal boss; 222. an annular groove; 23. a front cavity; 24. a rear cavity.
Detailed Description
The invention will be described in further detail with reference to the drawings and specific examples.
The utility model discloses a reversing valve for hydraulic rock drill.
As shown in fig. 1 and 2, the reversing valve for a hydraulic rock drill of the present embodiment includes: the device comprises a reversing valve sleeve 11, a reversing valve core 12, an impact cylinder sleeve 21 and an impact piston 22;
a reversing valve core 12 is arranged in the inner cavity of the reversing valve sleeve 11, an impact piston 22 is arranged in the inner cavity of the impact cylinder sleeve 21, and the inner cavity of the reversing valve sleeve 11 is communicated with the inner cavity of the impact cylinder sleeve 21 through an oil pipe;
the hydraulic oil pushes the reversing valve core 12 and the impact piston 22 to reciprocate, and when the reversing valve core 12 moves leftwards for a preset distance, the hydraulic oil pushes the impact piston 22 to move forwards; when the impact piston 22 advances a preset distance, the hydraulic oil pushes the reversing valve core 12 to move right; when the reversing valve core 12 moves to the right for a preset distance, the hydraulic oil pushes the impact piston 22 to retreat; when the impact piston 22 retreats for a preset distance, the hydraulic oil pushes the reversing valve core 12 to move left, and the operation is repeated in such a cycle.
A circulation space is formed by arranging a reversing valve sleeve 11 and an impact cylinder sleeve 21 which are communicated through an oil pipe. The reversing valve core 12 can reciprocate along the central axis in the reversing valve sleeve 11, the impact piston 22 can also reciprocate along the central axis in the impact cylinder sleeve 21, and when the reversing valve core 12 moves towards one end, the hydraulic state in the impact cylinder sleeve 21 can be changed, so that the movement direction of the impact piston 22 is changed; when the moving direction of the impact piston 22 changes, the hydraulic state in the reversing valve sleeve 11 is reversely changed, so that the moving direction of the reversing valve core 12 is changed, the two reciprocating motion are mutually influenced, and the opposite steering is triggered by the self motion, so that the linkage is realized. For current steering valve for hydraulic rock drill, the utility model discloses need not additionally to provide power for the steering valve, and the direction control of steering valve is closely related with the motion state who strikes piston 22, can effectively guarantee the synchronism.
In this embodiment, the reversing valve sleeve 11 and the reversing valve core 12 jointly enclose an alternating cavity 13 and a signal cavity 14, when the reversing valve core 12 moves to the left for a preset distance, high-pressure oil is injected into the alternating cavity 13, and when the reversing valve core 12 moves to the right for a preset distance, low-pressure oil is injected into the alternating cavity 13;
the reversing valve core 12 is provided with a first signal boss 121 matched with the signal cavity 14, and when high-pressure oil enters the signal cavity 14, the high-pressure oil pushes the reversing valve core 12 to move left through the first signal boss 121; conversely, the diverter spool 12 moves to the right.
The movement direction of the impact piston 22 is determined by the hydraulic pressure difference of the hydraulic oil, when the reversing valve core 12 moves left and right, the switch of the hydraulic oil entering and exiting the alternate cavity 13 is triggered, the hydraulic oil in a high-pressure state or a low-pressure state is controlled to alternately enter the alternate cavity 13, the hydraulic pressure of the alternate cavity 13 can determine the movement direction of the impact piston 22, and at the moment, the reversing valve core 12 serves as an adjusting switch of the movement direction of the impact piston 22.
In the embodiment, the impact cylinder sleeve 21 and the impact piston 22 jointly enclose a front cavity 23 and a rear cavity 24, when the impact piston 22 moves forward for a preset distance, low-pressure oil is injected into the front cavity 23, and when the impact piston 22 moves backward for a preset distance, high-pressure oil is injected into the front cavity 23;
the impact piston 22 is formed with a second signal boss 221 adapted to the rear cavity 24, and when the high-pressure oil enters the rear cavity 24, the high-pressure oil pushes the impact piston 22 to advance through the second signal boss 221, otherwise, the impact piston 22 retreats.
The movement direction of the diverter valve core 12 is determined by the hydraulic pressure difference of the hydraulic oil, when the impact piston 22 moves back and forth, the switch of the hydraulic oil entering and exiting the signal cavity 14 is triggered, the hydraulic oil in a high-pressure state or a low-pressure state is controlled to alternately enter the signal cavity 14, the hydraulic pressure of the signal cavity 14 can determine the movement direction of the diverter valve core 12, and at the moment, the impact piston 22 serves as an adjusting switch of the movement direction of the diverter valve core 12.
In this embodiment, the front chamber 23 communicates with the signal chamber 14, and the rear chamber 24 communicates with the alternate chamber 13.
The movement of the impact piston 22 determines the oil pressure of hydraulic oil injected into the front cavity 23, the oil pressure of the hydraulic oil in the signal cavity 14 can determine the movement direction of the reversing valve core 12, and the front cavity 23 is communicated with the signal cavity 14, namely the movement of the impact piston 22 can adjust the movement direction of the reversing valve core 12, so that the function of reversing the reversing valve core 12 by the impact piston 22 is realized; similarly, the movement of the direction changing valve core 12 determines the oil pressure of the hydraulic oil injected into the alternate cavity 13, the oil pressure of the hydraulic oil in the rear cavity 24 can determine the movement direction of the impact piston 22, and the rear cavity 24 is communicated with the alternate cavity 13, that is, the movement of the direction changing valve core 12 can reversely adjust the movement direction of the impact piston 22, thereby realizing the direction changing function of the impact piston 22 by using the direction changing valve core 12.
In this embodiment, two inner convex rings 111 are formed in the inner cavity of the direction-changing valve housing 11, and two outer convex rings 122 are formed on the outer wall of the direction-changing valve core 12, so as to divide the inner cavity of the direction-changing valve housing 11 into an alternating cavity 13, a high pressure cavity 15 and a low pressure cavity 16.
In order to alternately inject high-pressure oil or low-pressure oil into the alternate cavity 13, the high-pressure cavity 15 is alternately closed and simultaneously communicated with the low-pressure cavity 16 or the high-pressure cavity 15 is communicated and simultaneously closed the low-pressure cavity 16 through the matching of the inner convex ring 111 and the outer convex ring 122.
In this embodiment, low pressure oil is introduced into the low pressure chamber 16 and is located on the left side of the alternating chamber 13; high-pressure oil is introduced into the high-pressure cavity 15 and is positioned on the right side of the alternating cavity 13;
the alternate chambers 13 are alternately communicated with the high pressure chamber 15 or the low pressure chamber 16 by the reciprocating motion of the direction change spool 12.
High-pressure oil and low-pressure oil are respectively introduced through the low-pressure cavity 16 and the high-pressure cavity 15, and in the movement process of the reversing valve core 12, the low-pressure cavity 16 and the high-pressure cavity 15 are alternately communicated with the alternate cavity 13, so that the hydraulic pressure of the hydraulic oil in the alternate cavity 13 is changed.
In this embodiment, the reversing valve core 12 is a hollow structure; the interior of the diverter spool 12 is connected to a high pressure chamber 15.
A through hole for connecting the inner core is formed on the hollow reversing valve core 12, and the through hole is always connected with the high-pressure cavity 15 so that high-pressure oil enters the reversing valve core 12.
In this embodiment, a high pressure groove 211 and a low pressure groove 212 are formed in the inner wall of the impact cylinder sleeve 21, and high pressure oil is introduced into the high pressure groove 211 and is located on the front side of the front cavity 23; the low pressure groove 212 is filled with low pressure oil and is positioned at the rear side of the front cavity 23.
High-pressure oil and low-pressure oil are respectively introduced through the high-pressure groove 211 and the low-pressure groove 212, and the high-pressure groove 211 and the low-pressure groove 212 are alternately communicated with the front cavity 23 during the movement of the impact piston 22, so that the hydraulic pressure of the hydraulic oil in the front cavity 23 is changed.
In this embodiment, the impact piston 22 has an annular groove 222 formed on the outer surface thereof, and the annular groove 222 is capable of communicating the front chamber 23 with the low pressure groove 212 by the movement of the impact piston 22.
The annular groove 222 is used as a passage for communicating the front cavity 23 with the low-pressure groove 212, when the impact piston 22 moves backwards, the annular groove 222 is disconnected from the front cavity 23, low-pressure oil cannot enter the front cavity 23, and the front cavity 23 at the moment is filled with high-pressure oil; when the impact piston 22 advances forward, the annular groove 222 communicates with the front chamber 23, and the high-pressure groove 211 is disconnected from the front chamber 23, with the front chamber 23 filled with low-pressure oil.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention. The technical solution of the present invention can be used by anyone skilled in the art to make many possible variations and modifications, or to modify equivalent embodiments, without departing from the scope of the technical solution of the present invention, using the technical content disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments by the technical entity of the present invention should fall within the protection scope of the technical solution of the present invention.
Claims (9)
1. A reversing valve for a hydraulic rock drill, comprising: the device comprises a reversing valve sleeve (11), a reversing valve core (12), an impact cylinder sleeve (21) and an impact piston (22);
the reversing valve core (12) is installed in the inner cavity of the reversing valve sleeve (11), the impact piston (22) is installed in the inner cavity of the impact cylinder sleeve (21), and the inner cavity of the reversing valve sleeve (11) is communicated with the inner cavity of the impact cylinder sleeve (21) through an oil pipe;
the hydraulic oil pushes the reversing valve core (12) and the impact piston (22) to reciprocate, and when the reversing valve core (12) moves leftwards for a preset distance, the hydraulic oil pushes the impact piston (22) to move forwards; when the impact piston (22) advances for a preset distance, hydraulic oil pushes the reversing valve core (12) to move rightwards; when the reversing valve core (12) moves to the right for a preset distance, the hydraulic oil pushes the impact piston (22) to retreat; when the impact piston (22) retreats for a preset distance, hydraulic oil pushes the reversing valve core (12) to move left, and the operation is repeated in a circulating mode.
2. The reversing valve for the hydraulic rock drill according to claim 1, characterized in that the reversing valve sleeve (11) and the reversing valve core (12) jointly enclose an alternating cavity (13) and a signal cavity (14), when the reversing valve core (12) moves to the left by a preset distance, high-pressure oil is injected into the alternating cavity (13), and when the reversing valve core (12) moves to the right by a preset distance, low-pressure oil is injected into the alternating cavity (13);
the reversing valve core (12) is provided with a first signal boss (121) matched with the signal cavity (14), and when high-pressure oil enters the signal cavity (14), the high-pressure oil pushes the reversing valve core (12) to move left through the first signal boss (121); conversely, the reversing valve core (12) moves to the right.
3. The reversing valve for a hydraulic rock drill according to claim 2, characterized in that the impact cylinder liner (21) and the impact piston (22) together define a front chamber (23) and a rear chamber (24), low-pressure oil being injected into the front chamber (23) when the impact piston (22) advances a preset distance, and high-pressure oil being injected into the front chamber (23) when the impact piston (22) retreats a preset distance;
and a second signal boss (221) matched with the rear cavity (24) is formed on the impact piston (22), when high-pressure oil enters the rear cavity (24), the high-pressure oil pushes the impact piston (22) to move forwards through the second signal boss (221), and otherwise, the impact piston (22) moves backwards.
4. A reversing valve for a hydraulic rock drill according to claim 3, characterized in that the front chamber (23) communicates with the signal chamber (14) and the rear chamber (24) communicates with the alternate chamber (13).
5. The reversing valve for the hydraulic rock drill as recited in claim 1, characterized in that the inner cavity of the reversing valve sleeve (11) forms two inner convex rings (111) and the outer wall of the reversing valve core (12) forms two outer convex rings (122) to divide the inner cavity of the reversing valve sleeve (11) into an alternating cavity (13), a high pressure cavity (15) and a low pressure cavity (16).
6. A reversing valve for a hydraulic rock drill according to claim 5, characterized in that low-pressure oil is led into the low-pressure chamber (16) and is located to the left of the alternate chamber (13); high-pressure oil is introduced into the high-pressure cavity (15) and is positioned on the right side of the alternating cavity (13);
the alternating cavity (13) is communicated with the high-pressure cavity (15) or the low-pressure cavity (16) alternatively through the reciprocating motion of the reversing valve core (12).
7. A directional valve for hydraulic rock drilling machines according to claim 5 or 6, characterized in that the directional valve spool (12) is of hollow construction; the inner cavity of the reversing valve core (12) is connected with the high-pressure cavity (15).
8. The reversing valve for the hydraulic rock drill is characterized in that a high-pressure groove (211) and a low-pressure groove (212) are formed in the inner wall of the impact cylinder sleeve (21), high-pressure oil is introduced into the high-pressure groove (211), and the high-pressure groove is located on the front side of the front cavity (23); and low-pressure oil is introduced into the low-pressure groove (212) and is positioned at the rear side of the front cavity (23).
9. A reversing valve for a hydraulic rock drill according to claim 8, characterized in that the impact piston (22) has an annular groove (222) formed in its outer surface, the annular groove (222) enabling communication between the front chamber (23) and the low pressure groove (212) by movement of the impact piston (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121475577.XU CN215257069U (en) | 2021-06-30 | 2021-06-30 | Reversing valve for hydraulic rock drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121475577.XU CN215257069U (en) | 2021-06-30 | 2021-06-30 | Reversing valve for hydraulic rock drill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215257069U true CN215257069U (en) | 2021-12-21 |
Family
ID=79485627
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121475577.XU Active CN215257069U (en) | 2021-06-30 | 2021-06-30 | Reversing valve for hydraulic rock drill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215257069U (en) |
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2021
- 2021-06-30 CN CN202121475577.XU patent/CN215257069U/en active Active
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