CN110185666B - Hydraulic valve reversing buffer device - Google Patents
Hydraulic valve reversing buffer device Download PDFInfo
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- CN110185666B CN110185666B CN201910497882.XA CN201910497882A CN110185666B CN 110185666 B CN110185666 B CN 110185666B CN 201910497882 A CN201910497882 A CN 201910497882A CN 110185666 B CN110185666 B CN 110185666B
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- guide
- valve rod
- section
- guide section
- 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
- F15B13/021—Valves for interconnecting the fluid chambers of an actuator
Abstract
The invention discloses a reversing buffer device of a hydraulic valve, and belongs to the technical field of hydraulic valves. An anti-rotation plug is connected between the end cover and the valve rod; one end of the anti-rotation plug is provided with a guide section, and the other end of the anti-rotation plug is connected with the valve rod; the circumferential surface of the guide section is provided with a guide surface and a throttling groove; two throttling grooves are axially arranged along the guide section, and the two throttling grooves are symmetrically arranged; a partition plate is arranged in the end cover and divides the interior of the end cover into a front cavity and a rear cavity; the axis of the partition plate is provided with a guide hole, the section of the guide hole is matched with the section of the guide section in the direction, and the guide section is sleeved in the guide hole in a sliding manner. The invention realizes the micro-motion operation of the valve rod in the forward and reverse directions, and improves the flow control precision during micro-motion and the operability of the actuating mechanism; the flow and pressure fluctuation generated when the valve rod returns to the middle position in the forward direction and the reverse direction are effectively reduced, and the safety performance and the operation comfort level of the main machine are improved; the valve rod is effectively prevented from rotating, the risk of valve core clamping stagnation is avoided, and the safety of the actuating mechanism is improved.
Description
Technical Field
The invention relates to the technical field of hydraulic valves, in particular to a reversing buffer device of a hydraulic valve.
Background
The application environment of the engineering machinery is severe, the working condition is complex, and the uncontrollable factors are more; in the working process of the hydraulic valve, particularly in the reversing process of a valve rod, the flow rate is easy to change suddenly, the execution mechanism moves in an accelerated manner or stops suddenly due to the sudden change of liquid flow, so that the vibration of the execution mechanism causes certain hidden danger to the safety of a host machine, the vibration of the host machine is not beneficial to operation and control, and the operation comfort level is poor; meanwhile, when the engineering machinery is in fine operation, the requirement on the stability of the valve core in a micro-opening state is high, the stability of the valve core is favorable for controlling the flow precision, and the micro-operation of an actuating mechanism is facilitated; in the process that the actuating mechanism requires stable action, the throttling area of the valve rod can be slightly changed due to the rotation of the valve rod, so that the flow passing through the valve rod is changed, the action of the actuating mechanism is not coordinated, and the potential safety hazard is brought to the safety of a hydraulic control system.
Chinese patent discloses a hydraulic directional control valve device and carry on device's engineering machine (CN 105650047A), and its directional control valve device links to each other with hydraulic actuator unit, includes: the hydraulic control valve comprises a valve body, wherein a plurality of oil paths, a pump oil inlet, an oil inlet and an oil return port of a hydraulic execution unit and an oil return port of a multi-way valve are arranged in the valve body; the pump is connected with each oil way in the valve body through a pump oil inlet; the left pushing device is positioned on the left side of the valve body, the left side of the valve core in the valve body extends out of the valve body and extends into the left pushing device, and the left pushing device is used for controlling the valve body to slide rightwards; the right pushing device is positioned on the right side of the valve body, the right side of the valve core extends out of the valve body and into the right pushing device, and the right pushing device is used for controlling the valve body to slide leftwards; and the pilot pump is respectively connected with the left pushing device and the right pushing device and is used for transmitting the hydraulic oil to the left pushing device and/or the right pushing device.
Although the technology solves the problems of slow starting response and large reversing impact of the reversing valve, the technology still has the following problems:
1, the requirement of micro-operation of an actuating mechanism on control of the flow precision of the valve core is ignored, and fine operation of engineering machinery is not facilitated;
neglecting the influence of the valve rod rotation on the throttle area of the valve rod, the flow rate through the valve rod changes when the valve rod rotates, and the action of the actuating mechanism is not coordinated.
Disclosure of Invention
In order to solve the technical problem, the invention provides a hydraulic valve reversing buffer device.
The invention is realized by the following technical scheme: a hydraulic valve reversing buffer device comprises an end cover and a valve rod; an anti-rotation plug is connected between the end cover and the valve rod; one end of the anti-rotation plug is provided with a guide section, and the other end of the anti-rotation plug is connected with the valve rod; the circumferential surface of the guide section is provided with a guide surface and a throttling groove; two throttling grooves are axially arranged along the guide section, and the two throttling grooves are symmetrically arranged; a partition plate is arranged in the end cover and divides the interior of the end cover into a front cavity and a rear cavity; the axis of the partition plate is provided with a guide hole, the section of the guide hole is matched with the section of the guide section in a radial direction, and the guide section is sleeved in the guide hole in a sliding manner.
It further comprises the following steps: the guide section is cylindrical, two guide surfaces which are symmetrically arranged are milled on the guide section, and the section of the guide surface on the guide section is waist-shaped; and a mounting plane is milled on the outer side of the guide surface on the guide section.
The guide section is cylindrical, the guide surface is milled on the guide section, and the section of the guide surface on the guide section is semicircular; and a mounting plane is milled on the outer side of the guide surface on the guide section.
The throttling groove is formed in the circumferential surface of the guide section or the guide surface of the guide section.
When the valve rod is positioned at the middle position, the partition plate is positioned between the two throttling grooves which are axially arranged.
The anti-rotation plug is provided with an external thread at one end connected with the valve rod, the end part of the valve rod is provided with a threaded blind hole, and the external thread end of the anti-rotation plug is connected with the threaded blind hole of the valve rod through a thread.
Compared with the prior art, the invention has the beneficial effects that:
the micro-motion operation of the valve rod in the forward and reverse directions is realized through the symmetrically arranged throttling grooves, the micro-motion performance of the valve rod is improved, and the flow control precision during micro-motion and the operability of an actuating mechanism are improved;
2, the flow and pressure fluctuation generated when the valve rod returns to the middle position in the forward direction and the reverse direction are effectively reduced through the symmetrically arranged throttling grooves, the impact generated due to the flow and the pressure fluctuation is reduced, and the safety performance and the operation comfort level of the main machine are improved;
3, through the cooperation of direction section and division board, effectively prevent that the valve rod is rotatory, improve the stability of circulation fluid, avoided the risk of case jamming, improve actuating mechanism's security.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of an anti-rotation plug structure;
FIG. 3 is a schematic view of an end cap construction;
in the figure: 1. an end cap; 1-1, a partition plate; 1-2, a front cavity; 1-3, a rear cavity; 1-4, a guide hole; 2. an anti-rotation plug; 2-1, a guide section; 2-2, a guide surface; 2-3, mounting a plane; 3. a valve stem; 4. a throttling groove.
Detailed Description
The following is a specific embodiment of the present invention, which will be further described with reference to the accompanying drawings.
Referring to fig. 1 to 3, a reversing buffer device for a hydraulic valve comprises an end cover 1, an anti-rotation plug 2 and a valve rod 3, wherein the anti-rotation plug 2 is located between the end cover 1 and the valve rod 3. The one end of preventing rotating plug 2 and being connected with valve rod 3 is opened there is the external screw thread, and 3 tip of valve rod are opened threaded blind hole, and the external screw thread end of preventing rotating plug 2 passes through threaded connection and installs in 3 threaded blind holes of valve rod.
As shown in the combined figure 2, the inner end of the anti-rotation plug 2 is provided with a guide section 2-1. The circumferential surface of the guide section 2-1 is provided with a guide surface 2-2, a mounting plane 2-3 and a throttling groove 4. The guide section 2-1 is cylindrical, two guide surfaces 2-2 which are symmetrically arranged are milled on the guide section 2-1, and the section of the guide surface 2-2 position on the guide section 2-1 is waist-shaped. A guide surface 2-2 can also be milled on the guide section 2-1 separately, and the section at the position of the guide surface 2-2 on the guide section 2-1 is semicircular. The installation plane 2-3 is positioned at the outer side of the guide plane 2-2 on the guide section 2-1, and a certain distance is reserved between the installation plane 2-3 and the guide plane 2-2. The throttling grooves 4 are uniformly distributed on the circumferential surface of the guide section 2-1, and U, V, delta throttling grooves or other throttling grooves can be machined according to actual working conditions. The throttling groove 4 is arranged on the circumferential surface of the guide section 2-1 or the guide surface 2-2 on the guide section 2-1. And two throttle grooves 4 are arranged in the axial direction of each side, the two throttle grooves 4 being arranged symmetrically along the axial direction.
In addition, when the section of the guide surface 2-2 position on the guide section 2-1 is waist-shaped, the parallel guide surface 2-2 can be processed with variable section to realize the throttling function.
Referring to fig. 3, a partition plate 1-1 is arranged in an end cover 1, and the partition plate 1-1 divides the interior of the end cover 1 into a front cavity 1-2 and a rear cavity 1-3; the axis of the partition plate 1-1 is provided with a guide hole 1-4, the section of the guide hole 1-4 is matched with the section of the guide section 2-1, and the guide section 2-1 is slidably sleeved in the guide hole 1-4. Under the matching of the partition plate 1-1 and the guide section 2-1, an effective anti-rotation mode is formed for the valve rod, the stability of circulating oil is improved, the risk of valve core clamping stagnation is avoided, and the safety of an actuating mechanism is improved.
When the valve rod 3 is positioned in the middle position, the partition plate 1-1 is positioned between the two throttling grooves 4 which are axially arranged, so that a front closed cavity and a rear closed cavity are formed in the end cover 1 under the matching of the anti-rotation plug 2, no matter whether the anti-rotation plug 2 leads the oil A to be introduced or the oil B to be introduced along the axial direction of the valve rod 3, the throttling area at the matching surface of the anti-rotation plug 2 and the end cover 1 is gradually increased, namely the reversing process of the valve rod 3 is a gradual process which is slow first and fast later; in the process of resetting the valve rod 3, the movement of the valve rod is firstly fast and then slow as the throttling area at the matching surface of the anti-rotation plug 2 and the end cover 1 is gradually reduced; the anti-rotation plug 2 can change the flow area of the front cavity and the rear cavity of the end cover 1 along with the movement of the valve rod 3, the flow area is equivalent to a variable throttling hole in the function, the on-off of the two cavities is realized, the micro-motion characteristic of the valve rod 3 is realized through the change of the throttling areas in the forward direction and the reverse direction, and the hydraulic impact of the reset of the valve rod is reduced.
The embodiment shows that the reversing buffer device improves the stability and the precision of liquid flow under the micro-opening state of the valve rod, thereby eliminating the vibration and the crawling of the micro-opening of the hydraulic valve; meanwhile, hydraulic impact generated by quick return of the valve rod in the valve core resetting process can be eliminated, the operation comfort is improved, and the safety of a hydraulic system is improved; the application of the anti-rotation function can effectively prevent the valve rod from rotating in the valve core hole and improve the stability of the flow passing through the valve core hole; the influence of hydraulic power on the stability of the valve rod can be effectively avoided, and the anti-interference capability of the hydraulic valve is improved; meanwhile, the anti-rotation function can eliminate the phenomenon of valve rod clamping stagnation caused by machining errors of the valve rod and the valve core hole.
The invention is not only suitable for large-tonnage and super-tonnage hydraulic control mechanisms, but also can be applied to high-pressure and large-flow control mechanisms in other industries. According to the characteristics of the engineering machinery and the requirements of different working conditions, different throttling parameters and mechanical control structure parameters can be set so as to meet the requirements of different engineering machinery on different working conditions.
Claims (4)
1. A hydraulic valve reversing buffer device comprises an end cover (1) and a valve rod (3);
the method is characterized in that:
an anti-rotation plug (2) is connected between the end cover (1) and the valve rod (3);
one end of the anti-rotation plug (2) is provided with a guide section (2-1), and the other end of the anti-rotation plug (2) is connected with the valve rod (3); the circumferential surface of the guide section (2-1) is provided with a guide surface (2-2) and a throttling groove (4); two throttling grooves (4) are axially arranged along the guide section (2-1), and the two throttling grooves (4) are symmetrically arranged;
a partition plate (1-1) is arranged in the end cover (1), and the interior of the end cover (1) is divided into a front cavity (1-2) and a rear cavity (1-3) by the partition plate (1-1); the axis of the partition plate (1-1) is provided with a guide hole (1-4), the section of the guide hole (1-4) is matched with the section of the guide section (2-1), and the guide section (2-1) is slidably sleeved in the guide hole (1-4);
when the valve rod (3) is positioned at the middle position, the partition plate (1-1) is positioned in the middle of the two throttling grooves (4) arranged along the axial direction.
2. The reversing buffering device for the hydraulic valve according to claim 1, characterized in that: the guide section (2-1) is cylindrical, two guide surfaces (2-2) which are symmetrically arranged are milled on the guide section (2-1), and the section of the guide surface (2-2) on the guide section (2-1) is waist-shaped; the outer side of the guide surface (2-2) on the guide section (2-1) is milled with a mounting plane (2-3).
3. The reversing buffering device for the hydraulic valve according to claim 1, characterized in that: the guide section (2-1) is cylindrical, one guide surface (2-2) is milled on the guide section (2-1), and the section of the guide surface (2-2) on the guide section (2-1) is semicircular; the outer side of the guide surface (2-2) on the guide section (2-1) is milled with a mounting plane (2-3).
4. The reversing buffering device for the hydraulic valve according to claim 1, characterized in that: the anti-rotation plug (2) is provided with an external thread at one end connected with the valve rod (3), the end part of the valve rod (3) is provided with a threaded blind hole, and the external thread end of the anti-rotation plug (2) is connected with the threaded blind hole of the valve rod (3) through a thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910497882.XA CN110185666B (en) | 2019-06-10 | 2019-06-10 | Hydraulic valve reversing buffer device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910497882.XA CN110185666B (en) | 2019-06-10 | 2019-06-10 | Hydraulic valve reversing buffer device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110185666A CN110185666A (en) | 2019-08-30 |
| CN110185666B true CN110185666B (en) | 2021-06-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910497882.XA Active CN110185666B (en) | 2019-06-10 | 2019-06-10 | Hydraulic valve reversing buffer device |
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| CN (1) | CN110185666B (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007154769A (en) * | 2005-12-06 | 2007-06-21 | Mitsubishi Fuso Truck & Bus Corp | Exhaust emission control device |
| CN201104775Y (en) * | 2007-09-10 | 2008-08-27 | 尹德海 | Dual protection valve and air bleeder |
| CN102853094A (en) * | 2012-09-19 | 2013-01-02 | 重庆新泰机械有限责任公司 | Manual wedge-shaped throttle valve |
| CN102878734B (en) * | 2012-10-26 | 2014-10-15 | 温岭市恒发空调部件有限公司 | Expansion valve |
| JP6480201B2 (en) * | 2014-01-30 | 2019-03-06 | 古河ロックドリル株式会社 | Hydraulic striking device |
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| CN110185666A (en) | 2019-08-30 |
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