CN113124014B - Movement time adjusting structure and method of distributing valve for hydraulic breaking hammer - Google Patents
Movement time adjusting structure and method of distributing valve for hydraulic breaking hammer Download PDFInfo
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- CN113124014B CN113124014B CN202110356177.5A CN202110356177A CN113124014B CN 113124014 B CN113124014 B CN 113124014B CN 202110356177 A CN202110356177 A CN 202110356177A CN 113124014 B CN113124014 B CN 113124014B
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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
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/042—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F5/00—Dredgers or soil-shifting machines for special purposes
- E02F5/30—Auxiliary apparatus, e.g. for thawing, cracking, blowing-up, or other preparatory treatment of the soil
- E02F5/305—Arrangements for breaking-up hard ground
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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
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
- F15B1/024—Installations or systems with accumulators used as a supplementary power source, e.g. to store energy in idle periods to balance pump load
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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
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
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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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/21—Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge
- F15B2211/212—Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge the pressure sources being accumulators
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Percussive Tools And Related Accessories (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention provides a movement time adjusting structure and method of a distributing valve for a hydraulic breaking hammer, and belongs to the technical field of breaking equipment. The structure comprises a distributing valve, a middle cylinder body, a hydraulic control one-way valve, a throttle valve, an oil inlet and an oil return port, wherein the distributing valve, the middle cylinder body, the hydraulic control one-way valve and the throttle valve are connected through an oil passage inside a hydraulic breaking hammer, the hydraulic control one-way valve connected in parallel is connected with a low-pressure cavity of a valve body of the distributing valve through an oil passage on one side of the throttle valve, an oil passage on the other side of the throttle valve is connected with a signal cavity of the oil return port and the middle cylinder body, the oil return port is connected with the signal cavity, and a control oil passage of the hydraulic control one-way valve is connected with a high-low pressure conversion cavity of the valve body of the distributing valve. The hydraulic breaking hammer is characterized in that a hydraulic control one-way valve and a throttle valve oil way which are connected in parallel are arranged, so that the rising speed and the falling speed of a valve sleeve in a distributing valve of the hydraulic breaking hammer are adjustable, the opening time of an oil return opening of an oil return pipeline of the hydraulic breaking hammer can be delayed in a controllable mode, the oil return pressure in the oil return pipeline is effectively reduced, oil leakage of the oil return pipeline is reduced, and the reliability of parts in the oil return pipeline is improved.
Description
Technical Field
The invention relates to the technical field of crushing equipment, in particular to a movement time adjusting structure and method of a distributing valve for a hydraulic crushing hammer.
Background
The hydraulic breaking hammer is a machine tool capable of converting hydraulic energy into mechanical energy so as to apply work to the outside, is mainly used for the work of breaking, dismantling, excavating hard layers and the like, and is usually installed on an excavator, a loader or a power station for use; the traditional hydraulic breaking hammer is directly communicated with a signal cavity of a cylinder body in an oil return pipeline and a hydraulic breaking hammer through a low-pressure cavity in a valve body of a distributing valve, so that the falling speed of a valve sleeve of the distributing valve is not controllable, the opening time of an oil return opening of the oil return pipeline of the hydraulic breaking hammer cannot be adjusted, the oil return pressure of the oil return pipeline is too high, and oil leakage of the oil return pipeline and damage to parts are easily caused.
Disclosure of Invention
The invention provides a movement time adjusting structure and a movement time adjusting method of a distributing valve for a hydraulic breaking hammer, wherein a hydraulic control one-way valve is connected with a throttling valve in parallel, an oil way on one side of the hydraulic control one-way valve and the throttling valve which are connected in parallel is directly connected with a low-pressure cavity of a distributing valve body through an internal signal oil duct of the breaking hammer, then an oil way on the other side of the hydraulic control one-way valve and the throttling valve which are connected in parallel is connected with an oil return port (an oil tank) and a signal cavity of a middle cylinder body through an internal oil duct of the hydraulic breaking hammer, the arrangement direction of the hydraulic control one-way valve in the hydraulic control one-way valve and the throttling valve is that when the hydraulic control oil way is low-pressure, oil can only flow into the low-pressure cavity of the distributing valve body through the hydraulic breaking hammer, and the control oil way of the hydraulic control one-way valve is directly connected with a high-low pressure conversion cavity of the distributing valve body through the internal oil duct of the hydraulic breaking hammer. The invention arranges the hydraulic control one-way valve and the throttle valve which are connected in parallel at the low hydraulic cavity of the valve body of the distributing valve, when a signal cavity in the middle cylinder body is high-pressure oil, a high-pressure oil signal is transmitted to a high-low pressure conversion cavity and a hydraulic control one-way valve in a valve body of the distribution valve to obtain a control oil path, so that a valve sleeve in the distribution valve rises under the action of the resultant force of the oil and the hydraulic control one-way valve is opened, the oil is supplemented to a low-pressure cavity in the valve body of the distribution valve from the oil tank through the hydraulic control one-way valve and a throttle valve which are connected in parallel, the oil supplementing speed is not influenced, the adjustability of the pressure control of the hydraulic control one-way valve can be realized by setting the lowest pressure value of the control oil path at the opening moment of the hydraulic control one-way valve, and the opening moment of the hydraulic control one-way valve is controlled by matching with a throttling hole screw of a regulating throttle valve, further influencing the oil supplementing speed to the low-pressure cavity of the distributing valve to realize the adjustment of the rising speed of the valve sleeve of the distributing valve; when a signal cavity in the middle cylinder body is low-pressure oil, a low-pressure oil signal is transmitted to a high-low pressure conversion cavity in a valve body of the distribution valve and a control oil way of the hydraulic control one-way valve, so that a valve sleeve in the distribution valve falls back under the action of resultant force of the oil and the hydraulic control one-way valve is closed, the oil returns to an oil return port (oil tank) from the low-pressure cavity of the valve body of the distribution valve through the hydraulic control one-way valve and a throttle valve in the throttle valve which are connected in parallel, the falling speed of the valve sleeve of the distribution valve can be controlled by adjusting a throttle hole screw of the throttle valve to change the flow of the oil passing through the throttle valve, the opening time of the oil return port of the oil return pipeline can be controlled, the oil return pressure of the oil return pipeline is effectively reduced, the oil leakage of the oil return pipeline is reduced, and the reliability of parts in the oil return pipeline is improved.
The structure comprises a distributing valve, a middle cylinder body, a hydraulic control one-way valve, a throttle valve, an oil inlet, an energy accumulator and an oil return port, wherein the distributing valve, the middle cylinder body, the hydraulic control one-way valve and the throttle valve are all connected through an internal oil duct of a hydraulic breaking hammer, a high-low pressure conversion cavity I, a signal cavity and a high-pressure cavity are arranged in the middle cylinder body, a high-low pressure conversion cavity II and a low-pressure cavity are arranged in the distributing valve, the high-low pressure conversion cavity I is connected with the distributing valve, the hydraulic control one-way valve and the throttle valve are connected in parallel, the parallel hydraulic control one-way valve and an oil duct on one side of the throttle valve are connected with the low-pressure cavity of a valve body of the distributing valve through the internal signal oil duct of the hydraulic breaking hammer, the parallel hydraulic control one-way valve and an oil duct on the other side of the throttle valve are connected with the oil return port and the signal cavity of the middle cylinder body through the internal oil duct of the hydraulic breaking hammer, the control oil duct of the hydraulic control one-way valve and the two-way switching cavity of the distributing valve are directly connected with the internal oil duct of the hydraulic breaking hammer, one pipeline of the high-pressure cavity is connected with the high-pressure and low-pressure conversion cavity, the other pipeline of the high-pressure cavity is connected with the oil inlet, and the high-pressure and low-pressure conversion cavity II and the energy accumulator are both connected with the oil inlet through pipelines.
The control oil path of the hydraulic control one-way valve is directly connected with the signal cavity of the middle cylinder body through the internal oil passage of the hydraulic breaking hammer.
The arrangement direction of the throttle valves in the hydraulic control one-way valve and the throttle valve which are connected in parallel is that when the control oil path of the hydraulic control one-way valve is in low pressure, oil can only flow into the low pressure cavity of the valve body of the distributing valve in one way through the hydraulic control one-way valve.
The method for applying the adjusting structure comprises the following steps:
s1: the hydraulic control one-way valve and the throttle valve are connected in parallel, an oil way on one side of the hydraulic control one-way valve and the throttle valve which are connected in parallel is directly connected with a low-pressure cavity of a valve body of the distributing valve through an internal signal oil duct of the breaking hammer, then an oil way on the other side of the hydraulic control one-way valve and the throttle valve which are connected in parallel is connected with an oil return port and a signal cavity of a middle cylinder body through an internal signal oil duct of the hydraulic breaking hammer, the oil return port is directly connected with the signal cavity through the internal signal oil duct of the hydraulic breaking hammer, the arrangement directions of the hydraulic control one-way valve and the hydraulic control one-way valve in the throttle valve which are connected in parallel are that oil can only flow into the low-pressure cavity of the valve body of the distributing valve through the hydraulic control one-way valve, and a control oil way of the hydraulic control one-way valve and a high-low pressure conversion cavity two-way of the valve body of the distributing valve are directly connected through the internal signal oil duct of the hydraulic breaking hammer;
s2: when a signal cavity in the middle cylinder body is high-pressure oil, the high-pressure oil signal is transmitted to a high-low pressure conversion cavity II in a valve body of the distribution valve and a control oil way of the hydraulic control one-way valve, so that the valve sleeve in the distribution valve ascends under the action of the pressure oil resultant force and the hydraulic control one-way valve is opened, oil is supplemented to a low-pressure cavity in the valve body of the distribution valve from the oil tank through the hydraulic control one-way valve and the throttle valve which are connected in parallel, the adjustability of the pressure control of the hydraulic control one-way valve can be realized by setting the lowest pressure value of the control oil way at the opening moment of the hydraulic control one-way valve, the opening moment of the hydraulic control one-way valve is controllable, and the oil supplementing speed to the low-pressure cavity of the distribution valve is influenced to realize the adjustment of the ascending speed of the valve sleeve of the distribution valve;
s3: when the signal cavity in the middle cylinder body is low-pressure oil, the low-pressure oil signal is transmitted to a high-low pressure conversion cavity II and a control oil way of the hydraulic control one-way valve in the distribution valve body, so that the valve sleeve in the distribution valve falls back under the action of the pressure oil resultant force and the hydraulic control one-way valve is closed, the oil returns to an oil return port from the low-pressure cavity of the distribution valve body through the hydraulic control one-way valve and a throttle valve in the throttle valve which are connected in parallel, the falling speed of the valve sleeve of the distribution valve can be controlled by changing the flow of the oil passing through the throttle valve by adjusting a throttle hole screw of the throttle valve, and the opening time of the oil return port of the oil return pipeline can be delayed in a controllable manner.
The technical scheme of the invention has the following beneficial effects:
in the scheme, the hydraulic control one-way valve and the throttle valve which are connected in parallel are arranged at the low hydraulic cavity of the valve body of the distributing valve, when the signal cavity in the middle cylinder body is high-pressure oil, a high-pressure oil signal is transmitted to a high-low pressure conversion cavity and a hydraulic control one-way valve in a valve body of the distribution valve to obtain a control oil path, so that the valve sleeve in the distribution valve rises under the action of the resultant force of pressure oil and the hydraulic control one-way valve is opened, the oil is supplemented to the low-pressure cavity in the valve body of the distribution valve from the oil tank through the hydraulic control one-way valve and the throttle valve which are connected in parallel, the oil supplementing speed is not influenced, and the adjustability of the pressure control of the hydraulic control one-way valve can be realized by setting the lowest pressure value of the control oil path at the opening moment of the hydraulic control one-way valve, the opening time of the hydraulic control one-way valve is controlled, and the flow of oil passing through the throttle valve is changed by matching with a throttle hole screw of the regulating throttle valve, so that the oil supplementing speed to a low-pressure cavity of the distributing valve is influenced, and the ascending speed of a valve sleeve of the distributing valve is regulated; when a signal cavity in the middle cylinder body is low-pressure oil, a low-pressure oil signal is transmitted to a high-low pressure conversion cavity in a valve body of the distribution valve and a control oil way of the hydraulic control one-way valve, so that a valve sleeve in the distribution valve falls back under the action of pressure oil resultant force and the hydraulic control one-way valve is closed, oil returns to an oil return port (oil tank) from the low-pressure cavity of the valve body of the distribution valve through the hydraulic control one-way valve and a throttle valve in the throttle valve which are connected in parallel, the falling speed of the valve sleeve of the distribution valve can be controlled by adjusting a throttle hole screw of the throttle valve to change the flow of the oil passing through the throttle valve, the opening time of the oil return port of the oil return pipeline can be controlled, the oil return pressure of the oil return pipeline is effectively reduced, the oil leakage of the oil return pipeline is reduced, and the reliability of parts in the oil return pipeline is improved.
Drawings
Fig. 1 is a schematic view of a movement time adjusting structure of a distributing valve for a hydraulic breaking hammer according to the present invention.
Wherein: 1-middle cylinder body, 2-distributing valve, 3-throttle valve, 4-hydraulic control one-way valve, 5-oil return port, 6-energy accumulator, 7-oil inlet, 1.1-high and low pressure conversion cavity I, 1.2-signal cavity, 1.3-high pressure cavity, 2.1-high and low pressure conversion cavity II, 2.2-low pressure cavity.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
The invention provides a movement time adjusting structure and method of a distributing valve for a hydraulic breaking hammer.
As shown in fig. 1, the structure comprises a distributing valve 2, a middle cylinder body 1, a hydraulic control one-way valve 4, a throttle valve 3, an oil inlet 7, an energy accumulator 6 and an oil return port 5, wherein the distributing valve 2, the middle cylinder body 1, the hydraulic control one-way valve 4 and the throttle valve 3 are all connected by an internal oil duct of a hydraulic breaking hammer, a high-low pressure conversion cavity 1.1, a signal cavity 1.2 and a high-pressure cavity 1.3 are arranged in the middle cylinder body 1, a high-low pressure conversion cavity 2.1 and a low-pressure cavity 2.2 are arranged in the distributing valve 2, the high-low pressure conversion cavity 1.1 is connected with the distributing valve 2, the hydraulic control one-way valve 4 and the throttle valve 3 are connected in parallel, the oil duct on one side of the parallel hydraulic control one-way valve 4 and the throttle valve 3 is connected with the low-pressure cavity 2.2 of the valve body of the distributing valve 2 through the internal signal oil duct of the hydraulic breaking hammer, the oil duct on the other side of the parallel control one-way valve 4 and the throttle valve 3 is connected with the oil return port 5 and the internal oil duct of the middle cylinder body 1 through the hydraulic breaking hammer, the oil duct 5 is directly connected with the signal cavity 1.2 through the internal oil duct of the hydraulic breaking hammer, the control oil way of the hydraulic control one-way valve 4 is directly connected with the second high-low pressure conversion cavity 2.1 of the valve body of the distributing valve 2 through an internal oil duct of the hydraulic breaking hammer, one pipeline of the first high-pressure cavity 1.3 is connected with the second high-low pressure conversion cavity 2.1, the other pipeline of the first high-pressure cavity 1.3 is connected with an oil inlet 7, and the second high-low pressure conversion cavity 2.1 and the energy accumulator 6 are both connected with the oil inlet 7 through pipelines.
Wherein, the control oil circuit of the hydraulic control one-way valve 4 is directly connected with the signal cavity 1.2 of the middle cylinder body 1 through the internal oil passage of the hydraulic breaking hammer.
The arrangement direction of the throttle valve 3 in the hydraulic control one-way valve 4 and the throttle valve 3 which are connected in parallel is that when the oil path controlled by the hydraulic control one-way valve 4 is low pressure, oil can only flow into the low pressure cavity 2.2 of the valve body of the distributing valve 2 in one way through the hydraulic control one-way valve 4.
The following description is given in conjunction with a specific application process.
In specific application, firstly checking and confirming that the structural connection relationship is correct, namely, the hydraulic control one-way valve 4 and the throttle valve 3 are connected in parallel, an oil circuit on one side of the hydraulic control one-way valve 4 and the throttle valve 3 which are connected in parallel is directly connected with the low-pressure cavity 2.2 of the valve body of the distributing valve 2 through the signal oil passage inside the breaking hammer, then the hydraulic control one-way valve and the oil circuit at the other side of the throttle valve which are connected in parallel are connected with the oil return port 5 and the signal cavity 1.2 of the middle cylinder body 1 through the internal oil passage of the hydraulic breaking hammer, the oil return port 5 is directly connected with the signal cavity 1.2 through the internal oil passage of the hydraulic breaking hammer, the hydraulic control one-way valve 4 in the parallel connection and the hydraulic control one-way valve 4 in the throttle valve 3 are arranged in the direction that oil can only flow into the low-pressure cavity 2.2 of the valve body of the distributing valve 2 in one way through the hydraulic control one-way valve 4, the control oil way of the hydraulic control one-way valve 4 is directly connected with the second high-low pressure conversion cavity 2.1 of the valve body of the distributing valve 2 through an internal oil passage of the hydraulic breaking hammer;
in practical use, when the signal cavity 1.2 in the middle cylinder body 1 is high-pressure oil, the high-pressure oil signal is transmitted to the high-low pressure conversion cavity II 2.1 in the valve body of the distribution valve 2 and the control oil way of the hydraulic control one-way valve 4, so that the valve sleeve in the distribution valve 2 rises under the action of the pressure oil resultant force and the hydraulic control one-way valve 4 is opened, the oil is supplemented to the low-pressure cavity 2.2 in the valve body of the distribution valve 2 through the hydraulic control one-way valve 4 and the throttle valve 3 which are connected in parallel, the adjustability of the pressure control of the hydraulic control one-way valve 4 can be realized by setting the lowest pressure value of the control oil way at the opening time of the hydraulic control one-way valve 4, the opening time of the hydraulic control one-way valve 4 is controllable, and the oil supplementing speed to the low-pressure cavity 2.2 of the distribution valve 2 is influenced to realize the adjustment of the rising speed of the valve sleeve of the distribution valve 2;
when the signal cavity 1.2 in the middle cylinder body 1 is low-pressure oil, the low-pressure oil signal is transmitted to the high-low pressure conversion cavity II 2.1 in the valve body of the distribution valve 2 and the control oil circuit of the hydraulic control one-way valve 4, so that the valve sleeve in the distribution valve 2 falls back under the action of the pressure oil force and the hydraulic control one-way valve 4 is closed, the oil returns to the oil return opening 5 from the low-pressure cavity 2.2 of the valve body of the distribution valve 2 through the hydraulic control one-way valve 4 and the throttle valve 3 in the throttle valve 3 which are connected in parallel, the falling speed of the valve sleeve of the distribution valve 2 can be controlled by changing the flow of the oil passing through the throttle valve 3 by adjusting a throttle hole screw of the throttle valve 3, and the opening time of the oil return opening 5 of the oil return pipeline can be delayed in a controllable manner.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (3)
1. The utility model provides a structure is adjusted with motion time of distributing valve to hydraulic breaking hammer which characterized in that: the hydraulic breaking hammer comprises a distributing valve (2), a middle cylinder body (1), a hydraulic control one-way valve (4), a throttle valve (3), an oil inlet (7), an energy accumulator (6) and an oil return port (5), wherein the distributing valve (2), the middle cylinder body (1), the hydraulic control one-way valve (4) and the throttle valve (3) are connected through an internal oil duct of a hydraulic breaking hammer, a high-low pressure conversion cavity I (1.1), a signal cavity (1.2) and a high-pressure cavity (1.3) are arranged in the middle cylinder body (1), a high-low pressure conversion cavity II (2.1) and a low-pressure cavity (2.2) are arranged in the distributing valve (2), the high-low pressure conversion cavity I (1.1) is connected with the distributing valve (2), the hydraulic control one-way valve (4) and the throttle valve (3) are connected in parallel, the hydraulic control one-way valve (4) and the throttle valve (3) in parallel are connected through an internal signal oil duct of the low-pressure cavity (2.2) of the distributing valve body and the hydraulic breaking hammer, the oil return valve (4) and the other side of the cylinder body and the throttle valve (3) are connected with the oil duct (5) The signal cavity (1.2) is connected through an internal oil duct of the hydraulic breaking hammer, an oil return port (5) is directly connected with the signal cavity (1.2) through the internal oil duct of the hydraulic breaking hammer, a control oil path of a hydraulic control one-way valve (4) is directly connected with a high-low pressure conversion cavity II (2.1) of a valve body of the distributing valve (2) through the internal oil duct of the hydraulic breaking hammer, one pipeline of a high-pressure cavity (1.3) is connected with the high-low pressure conversion cavity II (2.1), the other pipeline of the high-pressure cavity (1.3) is connected with an oil inlet (7), and the high-low pressure conversion cavity II (2.1) and an energy accumulator (6) are both connected with the oil inlet (7) through pipelines;
the method for applying the structure comprises the following steps:
s1: the hydraulic control one-way valve (4) and the throttle valve (3) are connected in parallel, an oil passage at one side of the hydraulic control one-way valve (4) and the throttle valve (3) which are connected in parallel is directly connected with a low-pressure cavity (2.2) of a valve body of the distributing valve (2) through a signal oil passage inside the breaking hammer, then the hydraulic control one-way valve and the oil circuit at the other side of the throttle valve which are connected in parallel are connected with the oil return port (5) and the signal cavity (1.2) of the middle cylinder body (1) through the internal oil passage of the hydraulic breaking hammer, the oil return port (5) is directly connected with the signal cavity (1.2) through an internal oil passage of the hydraulic breaking hammer, the hydraulic control one-way valve (4) in the parallel connection and the hydraulic control one-way valve (4) in the throttle valve (3) are arranged in the direction that oil can only flow into the low-pressure cavity (2.2) of the valve body of the distributing valve (2) in one way through the hydraulic control one-way valve (4), the control oil way of the hydraulic control one-way valve (4) is directly connected with a second high-low pressure conversion cavity (2.1) of the valve body of the distributing valve (2) through an internal oil passage of the hydraulic breaking hammer;
s2: when a signal cavity (1.2) in the middle cylinder body (1) is high-pressure oil, at the moment, a high-pressure oil signal is transmitted to a high-low pressure conversion cavity II (2.1) in a valve body of the distribution valve (2) and a control oil way of the hydraulic control one-way valve (4), so that a valve sleeve in the distribution valve (2) rises under the action of the pressure oil resultant force and the hydraulic control one-way valve (4) is opened, oil is supplemented to a low-pressure cavity (2.2) in the valve body of the distribution valve (2) from the oil tank through the hydraulic control one-way valve (4) and the throttle valve (3) which are connected in parallel, at the moment, the adjustability of the pressure control of the hydraulic control one-way valve (4) can be realized by setting the lowest pressure value of the control oil way at the opening moment of the hydraulic control one-way valve (4), the opening moment of the hydraulic control one-way valve (4) can be controlled, and the oil supplementing speed to the low-pressure cavity (2.2) of the distribution valve (2) is influenced, so that the adjustment of the rising speed of a valve sleeve of the distribution valve (2) is realized;
s3: when a signal cavity (1.2) in the middle cylinder body (1) is low-pressure oil, at the moment, a low-pressure oil signal is transmitted to a high-low pressure conversion cavity II (2.1) in a valve body of the distribution valve (2) and a control oil way of the hydraulic control one-way valve (4), so that a valve sleeve in the distribution valve (2) falls back under the action of the pressure oil force and the hydraulic control one-way valve (4) is closed, oil returns to an oil return opening (5) through the hydraulic control one-way valve (4) and a throttle valve (3) in the throttle valve (3) which are connected in parallel from the low-pressure cavity (2.2) of the valve body of the distribution valve (2), at the moment, the falling speed of the valve sleeve of the distribution valve (2) can be controlled by changing the flow of the oil through the throttle valve (3) through adjusting a throttle hole screw of the throttle valve (3), and the opening time of the oil return opening (5) of the oil return pipeline can be controlled.
2. The movement time adjusting structure of a distributing valve for a hydraulic demolition hammer according to claim 1, wherein: and a control oil way of the hydraulic control one-way valve (4) is directly connected with a signal cavity (1.2) of the middle cylinder body (1) through an internal oil passage of the hydraulic breaking hammer.
3. The movement time adjusting structure of a distributing valve for a hydraulic demolition hammer according to claim 1, wherein: the arrangement direction of the throttle valves (3) in the hydraulic control one-way valve (4) and the throttle valve (3) which are connected in parallel is that when the control oil way of the hydraulic control one-way valve (4) is low pressure, the hydraulic control one-way valve (4) is closed, and oil returns to the oil return opening (5) from the low pressure cavity (2.2) of the valve body of the distributing valve (2) through the throttle valve (3) in the hydraulic control one-way valve and the throttle valve (3) which are connected in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110356177.5A CN113124014B (en) | 2021-04-01 | 2021-04-01 | Movement time adjusting structure and method of distributing valve for hydraulic breaking hammer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110356177.5A CN113124014B (en) | 2021-04-01 | 2021-04-01 | Movement time adjusting structure and method of distributing valve for hydraulic breaking hammer |
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| CN113124014A CN113124014A (en) | 2021-07-16 |
| CN113124014B true CN113124014B (en) | 2022-04-22 |
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| CN202110356177.5A Active CN113124014B (en) | 2021-04-01 | 2021-04-01 | Movement time adjusting structure and method of distributing valve for hydraulic breaking hammer |
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| CN103669451B (en) * | 2014-01-08 | 2015-08-12 | 郑清 | The independent hydraulically controlled work system of quartering hammer |
| CN105275037B (en) * | 2014-06-10 | 2017-10-03 | 赵德朝 | A kind of hydraulic breaking hammer |
| KR101712584B1 (en) * | 2015-11-16 | 2017-03-06 | 한국생산기술연구원 | Striking apparatus having multiple hydraulic breakers and, striking methods using the multiple hydraulic breakers |
| CN105526207B (en) * | 2016-01-28 | 2018-02-06 | 无锡必克液压股份有限公司 | Flow control system is matched somebody with somebody in a kind of hydraulic gate flat valve and its application |
| CN111396408B (en) * | 2020-04-20 | 2022-03-04 | 中铁工程装备集团有限公司 | Stroke control device and method for slurry shield crusher |
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