CN212407662U - Reversing valve of breaking hammer - Google Patents
Reversing valve of breaking hammer Download PDFInfo
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- CN212407662U CN212407662U CN202020600429.5U CN202020600429U CN212407662U CN 212407662 U CN212407662 U CN 212407662U CN 202020600429 U CN202020600429 U CN 202020600429U CN 212407662 U CN212407662 U CN 212407662U
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Abstract
The utility model provides a switching-over valve of quartering hammer belongs to quartering hammer technical field. It has solved the current unstable problem of switching-over valve work. The reversing valve of the breaking hammer comprises a valve seat with a valve cavity, a valve sleeve arranged in the valve cavity and a valve core arranged in the valve sleeve in a sliding mode, wherein the valve core is provided with an oil passing channel which is arranged along the axial direction of the valve core and is communicated with the valve cavity, the front end of the valve seat is provided with an oil inlet hole communicated with the oil passing channel, the inner wall of the rear end of the valve cavity is provided with an oil groove, the circumferential surface of the rear end of the valve sleeve is provided with an oil passing hole communicated with the oil groove, the rear end of the valve seat is provided with an oil outlet hole communicated with the oil groove, and the rear side of the oil passing hole. The lateral movement of the valve core is stable and smooth, the blocking condition of the valve core can not occur, and meanwhile, the friction force between the valve core and the valve sleeve is reduced, so that the valve core and the valve sleeve are not easy to wear, and the service life of the reversing valve is prolonged.
Description
Technical Field
The utility model belongs to the technical field of the quartering hammer, a reversing valve of quartering hammer is related to.
Background
The breaking hammer is usually installed on an excavator, a loader or a power station for use, has the advantages of large impact force, convenient use, good maneuverability, high efficiency and the like, and is mainly used for the work of breaking, dismantling, excavating hard layers and the like in building construction. The existing breaking hammer generally comprises a cylinder body, a drill rod, a piston and a hydraulic system, wherein the drill rod and the piston are arranged in the cylinder body in a sliding mode, and the hydraulic system drives the piston to reciprocate along the axial direction of the cylinder body, so that the piston continuously strikes the drill rod. The hydraulic system mainly comprises an oil pump, a hydraulic pipeline and a reversing valve, and the reversing valve controls the flow direction of hydraulic oil in the hydraulic system.
For example, chinese patent network discloses a hydraulic breaking hammer reversing valve and a manufacturing method thereof [ publication No.: CN101324278A takes a middle cylinder body as a valve body, a valve hole is formed in the valve body, an oil duct leading to an oil cylinder of the middle cylinder body is communicated with the inner wall of the valve hole, a valve sleeve matched with the valve hole is arranged in the valve hole, a valve core is arranged in the valve sleeve, a valve cover is arranged at the end part of the valve hole, the valve hole is an unthreaded hole, an annular groove is formed in the position, corresponding to the opening of the oil duct, of the outer wall of the valve sleeve, and the annular groove. When the reversing valve is used, high-pressure oil enters the annular groove through the oil duct, the high-pressure oil enters the oil hole and pushes the valve element to transversely reciprocate in the valve hole, when the valve element moves rightwards, the annular groove is communicated with the central hole of the valve element, and the high-pressure oil in the annular groove enters the central hole of the valve element and enters the cylinder body through the oil outlet hole on one side of the valve body.
When the annular groove is communicated with the central hole of the valve core, the oil is fed from the side part of the valve core, high-pressure oil acts on the peripheral surface of one end of the valve core and radially presses the end part of the valve core, the other end of the valve core does not radially press the other end of the valve core, the whole valve core is unevenly stressed, the valve core generates certain deviation, the friction force between the valve core and a valve sleeve in the process of transverse sliding of the valve core in the valve hole is increased, the valve core is extremely easy to wear and damage, the service life of the reversing valve is shortened, and the phenomenon of blocking of the valve core when the valve core transversely moves in the valve hole is also caused.
Disclosure of Invention
The utility model aims at having the above-mentioned problem to current technique, provided a switching-over valve of quartering hammer, the utility model aims to solve the technical problem that: the service life of the reversing valve is prolonged while the working stability of the reversing valve is ensured.
The purpose of the utility model can be realized by the following technical proposal:
the reversing valve of the breaking hammer comprises a valve seat with a valve cavity, a valve sleeve arranged in the valve cavity and a valve core arranged in the valve sleeve in a sliding mode, wherein the valve core is provided with an oil passing channel which is arranged along the axial direction of the valve core and communicated with the valve cavity.
The use principle of the reversing valve is as follows: high-pressure oil enters the oil passing channel from the oil inlet hole, when the rear port of the oil passing channel is not sealed by the plugging structure, the high-pressure oil in the oil passing channel enters the oil groove through the oil passing hole, the high-pressure oil in the oil groove is discharged from the reversing valve through the oil outlet hole, and when the valve core moves backwards and the rear port of the oil passing channel is sealed by the plugging structure, the high-pressure oil in the oil passing channel cannot enter the oil groove through the oil passing hole at the moment. When the reversing valve is used for feeding oil, high-pressure oil directly enters the oil passing channel, the condition that the peripheral surface of the valve core is locally stressed is avoided, the valve core is always kept in a balanced state in the oil feeding process, the condition that the valve core deviates is avoided, the transverse movement of the valve core is ensured to be stable and smooth, the condition that the valve core is clamped can not occur, meanwhile, the friction force between the valve core and the valve sleeve is reduced, the valve core and the valve sleeve are not easy to wear, and the service life of the reversing valve is prolonged.
In the reversing valve of the breaking hammer, the outer port of the oil inlet hole is positioned on the front end surface of the valve seat. Through the setting of this structure, the axis of inlet port and the axis of crossing the oil passageway are parallel or coincide, and high-pressure oil realizes horizontal oil feed through the inlet port, and high-pressure oil directly enters into in the oil passageway, guarantees to keep balanced state at the oil feed in-process case.
In the reversing valve of the breaking hammer, the valve cavity further comprises a transition oil cavity located between the oil inlet hole and the valve core, and the oil inlet hole, the transition oil cavity and the oil passing channel are sequentially communicated. Through the setting of this structure, high-pressure oil enters into the transition oil intracavity through the inlet port earlier, high-pressure oil in the transition oil intracavity enters into the oil passage after that, because the internal diameter of inlet port is less, the in-process velocity of flow that high-pressure oil flows through the inlet port is very fast, high-pressure oil enters into transition oil intracavity back, because transition oil pocket internal diameter is great, the velocity of flow of high-pressure oil has been reduced for high-pressure oil can be gentle flow into in the oil passage, and then reduce the impact to the case, guarantee in the oil feed in-process case keeps balanced state.
In the reversing valve of the breaking hammer, the blocking structure comprises a valve sleeve, the rear end of the valve sleeve is closed to form an end plate, and the rear end surface of the valve core can abut against the end plate. Through the arrangement of the structure, the front end of the valve sleeve is open, the rear end of the valve sleeve is closed, and when the rear end surface of the valve core abuts against the end plate, the rear end port of the oil passing channel is closed, so that high-pressure oil in the oil passing channel cannot flow out; when a gap is formed between the rear end face of the valve core and the end plate, high-pressure oil flows into the valve sleeve from the rear port of the oil passage and enters the oil groove through the oil passage hole.
In the reversing valve of the breaking hammer, the valve cavity is internally provided with the first step surface, the front end of the valve sleeve abuts against the first step surface, the rear end surface of the valve seat is provided with a valve port communicated with the valve cavity, and the valve port is internally connected with a valve cover abutting against the end plate. Through the arrangement of the structure, the first step surface is matched with the valve cover to position the valve sleeve in the valve cavity.
In the reversing valve of the breaking hammer, a second step surface is arranged in the valve cavity, and the front end of the valve core can abut against the second step surface; when the front end of the valve core is abutted against the two steps, a distance is reserved between the rear end face of the valve core and the end plate. Through the arrangement of the structure, when the front end of the valve core is abutted against the two phases of the step surfaces, high-pressure oil in the oil passing channel flows into the valve sleeve and enters the oil groove through the oil passing hole, and the step surfaces play a limiting role in forward movement of the valve core.
In the reversing valve of the breaking hammer, the oil groove is annular, and the outer port of the oil outlet hole is located on the lower surface of the valve seat.
Compared with the prior art, the utility model discloses a reversing valve of quartering hammer has following advantage: when the reversing valve is used for feeding oil, high-pressure oil directly enters the oil passing channel, the condition that the peripheral surface of the valve core is locally stressed is avoided, the valve core is always kept in a balanced state in the oil feeding process, the condition that the valve core deviates is avoided, the transverse movement of the valve core is ensured to be stable and smooth, the condition that the valve core is clamped can not occur, meanwhile, the friction force between the valve core and the valve sleeve is reduced, the valve core and the valve sleeve are not easy to wear, and the service life of the reversing valve is prolonged.
Drawings
Fig. 1 is a schematic sectional structure diagram of the reversing valve of the present invention.
Fig. 2 is a schematic sectional structure view of the reversing valve of the present invention assembled to the middle cylinder.
In the figure, 1, valve seat; 11. a valve cavity; 11a, a transition oil cavity; 12. an oil inlet hole; 13. an oil sump; 14. a first step surface; 15. a valve port; 16. a step surface II; 17. an oil outlet hole; 2. a valve housing; 21. an oil passing hole; 22. an end plate; 3. a valve core; 31. an oil passing channel; 4. a valve cover; 5. a middle cylinder body; 51. an oil filler hole; 52. a pressure chamber; 6. a piston.
Detailed Description
The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.
Example 1
As shown in fig. 1, the reversing valve of the breaking hammer comprises a valve seat 1 with a valve cavity 11, a valve sleeve 2 arranged in the valve cavity 11, and a valve core 3 arranged in the valve sleeve 2 in a sliding manner, wherein an oil passage 31 arranged along the axial direction of the valve core 3 and communicated with the valve cavity 11 is arranged in the valve core 3, an oil inlet 12 is arranged on the front end surface of the valve seat 1 along the axial direction of the valve core 3, the valve cavity 11 further comprises a transition oil cavity 11a positioned between the oil inlet 12 and the valve core 3, the oil inlet 12 is communicated with the transition oil cavity 11a, and the transition oil cavity 11a is communicated with the oil passage 31. An oil groove 13 is formed in the inner wall of the rear end of the valve cavity 11, the oil groove 13 is annular, an oil passing hole 21 communicated with the oil groove 13 is formed in the circumferential surface of the rear end of the valve sleeve 2, an oil outlet hole 17 communicated with the oil groove 13 is formed in the rear end of the valve seat 1, the outer port of the oil outlet hole 13 is located on the lower surface of the valve seat 1, the blocking structure comprises a valve sleeve 2, the rear end of the valve sleeve 2 is closed and forms an end plate 22, and the rear end face of the valve core 3 can abut.
As shown in fig. 1 and 2, when the reversing valve is used, the reversing valve is installed on the middle cylinder 5, the oil outlet 17 is communicated with the oil inlet 51, an arrow in fig. 1 indicates the flow direction of high-pressure oil, the high-pressure oil enters the transition oil cavity 11a from the oil inlet 12 and enters the oil passing channel 31 from the transition oil cavity 11a, when the rear end surface of the valve core 3 does not abut against the end plate 22, the high-pressure oil in the oil passing channel 31 enters the valve sleeve 2, and the high-pressure oil sequentially flows through the oil hole 21, the oil groove 13, the oil outlet 17 and the oil inlet 51 and then enters the pressure cavity 52, and the high-pressure oil pushes the piston 6 to descend and strike. When the valve element 3 moves backward so that the rear end surface of the valve element 3 abuts against the end plate 22, the rear port of the oil passage 31 is closed, and the high-pressure oil cannot flow out of the oil passage 31. In the reversing valve, the oil inlet hole 12, the transition oil cavity 11a and the oil passing channel 31 are transversely arranged and are communicated with each other, so that high-pressure oil directly enters the oil passing channel 31 through the oil inlet hole 12 and the transition oil cavity 11a, the condition that the peripheral surface of the valve element 3 is locally stressed is avoided in the oil inlet mode, the valve element 3 is always kept in a balanced state in the oil inlet process, the condition that the valve element 3 deflects is avoided, the transverse reciprocating movement of the valve element 3 is stable and smooth, the condition that the valve element 3 is clamped to be dead can not occur, meanwhile, the friction force between the valve element 3 and the valve sleeve 2 is reduced, the valve element 3 and the valve sleeve 2 are not easy to wear, and the service life of the reversing valve.
As shown in fig. 1, the valve cavity 11 has a first step surface 14, the front end of the valve sleeve 2 abuts against the first step surface 14, the rear end surface of the valve seat 1 is provided with a valve port 15 communicated with the valve cavity 11, the valve port 15 is internally connected with a valve cover 4 abutting against an end plate 22, and the first step surface 14 and the valve cover 4 position the valve sleeve 2 in the valve cavity 11; the valve cavity 11 is internally provided with a second step surface 16, the front end of the valve core 3 can abut against the second step surface 16, the second step surface 16 plays a role in limiting the forward movement of the valve core 3, and when the front end surface of the valve core 3 abuts against the second step surface 16, a space is formed between the rear end surface of the valve core 3 and the end plate 22.
Example 2
This embodiment is substantially the same as embodiment 1 described above, except that: this front and back end of valve barrel 2 is all uncovered setting, and the rear end face of valve barrel 2 leans on with the interior bottom surface counterbalance of valve gap 4, and the rear end face of case 3 also can lean on with the interior bottom surface counterbalance of valve gap 4, and when the rear end face of case 3 leaned on with the interior bottom surface counterbalance of valve gap 4, the rear port of crossing oil passageway 31 was sealed.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Claims (7)
1. A reversing valve of a breaking hammer comprises a valve seat (1) with a valve cavity (11), a valve sleeve (2) arranged in the valve cavity (11) and a valve core (3) arranged in the valve sleeve (2) in a sliding way, the valve core (3) is internally provided with an oil passage (31) which is arranged along the axial direction of the valve core (3) and communicated with the valve cavity (11), it is characterized in that the front end of the valve seat (1) is provided with an oil inlet (12) communicated with an oil passage (31), an oil groove (13) is arranged on the inner wall of the rear end of the valve cavity (11), an oil passing hole (21) communicated with the oil groove (13) is arranged on the circumferential surface of the rear end of the valve sleeve (2), the rear end of the valve seat (1) is provided with an oil outlet (17) communicated with the oil groove (13), the rear side of the oil passing hole (21) is provided with a blocking structure capable of blocking the rear port of the oil passing channel (31).
2. A reversing valve for a breaking hammer according to claim 1, characterized in that the outer port of the oil inlet hole (12) is located on the front end face of the valve seat (1).
3. The reversing valve of the breaking hammer is characterized in that the valve cavity (11) further comprises a transition oil cavity (11a) between the oil inlet hole (12) and the valve core (3), and the oil inlet hole (12), the transition oil cavity (11a) and the oil passing channel (31) are communicated in sequence.
4. A breaking hammer reversing valve according to claim 1, characterized in that the blocking structure comprises a valve sleeve (2) closed at its rear end and forming an end plate (22), the rear end face of the valve core (3) being able to abut against the end plate (22).
5. The reversing valve of the breaking hammer according to claim 4, wherein the valve cavity (11) is internally provided with a first step surface (14), the front end of the valve sleeve (2) abuts against the first step surface (14), the rear end surface of the valve seat (1) is provided with a valve port (15) communicated with the valve cavity (11), and the valve cover (4) abutting against the end plate (22) is connected in the valve port (15).
6. The reversing valve of the breaking hammer is characterized in that a second step surface (16) is arranged in the valve cavity (11), and the front end of the valve core (3) can abut against the second step surface (16); when the front end of the valve core (3) is abutted against the second step surface (16), a space is reserved between the rear end surface of the valve core (3) and the end plate (22).
7. A breaking hammer reversing valve according to claim 1, characterized in that the oil groove (13) is annular, and the outer port of the oil outlet hole (17) is located on the lower surface of the valve seat (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020600429.5U CN212407662U (en) | 2020-04-21 | 2020-04-21 | Reversing valve of breaking hammer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020600429.5U CN212407662U (en) | 2020-04-21 | 2020-04-21 | Reversing valve of breaking hammer |
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| Publication Number | Publication Date |
|---|---|
| CN212407662U true CN212407662U (en) | 2021-01-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020600429.5U Active CN212407662U (en) | 2020-04-21 | 2020-04-21 | Reversing valve of breaking hammer |
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| CN (1) | CN212407662U (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 |
-
2020
- 2020-04-21 CN CN202020600429.5U patent/CN212407662U/en active Active
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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