CN109611406B - Hydraulic reversing valve - Google Patents
Hydraulic reversing valve Download PDFInfo
- Publication number
- CN109611406B CN109611406B CN201910027449.XA CN201910027449A CN109611406B CN 109611406 B CN109611406 B CN 109611406B CN 201910027449 A CN201910027449 A CN 201910027449A CN 109611406 B CN109611406 B CN 109611406B
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- Prior art keywords
- valve
- valve core
- port
- working
- valve body
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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
- F15B13/0401—Valve members; Fluid interconnections therefor
- F15B13/0402—Valve members; Fluid interconnections therefor for linearly sliding valves, e.g. spool valves
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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
- F15B13/0401—Valve members; Fluid interconnections therefor
- F15B2013/041—Valve members; Fluid interconnections therefor with two positions
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Sliding Valves (AREA)
- Multiple-Way Valves (AREA)
Abstract
The invention discloses a hydraulic reversing valve which comprises a working pipe, wherein a square valve groove is formed in the long surface of the working pipe, a valve body is embedded in the valve groove, a valve core is installed in the valve body, and the valve core can move in the valve body. According to the hydraulic reversing valve, the valve body, the valve core and the valve seat are integrated in the working pipe in a unified manner, so that the pipeline operation is facilitated; a saddle-shaped hydraulic chamber is formed between the plunger of the valve core and the valve body, so that the influence of the flow of high-pressure high-speed liquid is facilitated; the second annular groove is formed in the valve core, so that the influence of radial force on the reversing performance of the valve is reduced; the valve core is provided with a triangular throttling groove, so that the influence of transient hydrodynamic force on the reversing performance of the valve is reduced. The hydraulic reversing valve can be integrated in a working pipe, is convenient for pipeline operation and is simple and convenient to operate.
Description
Technical Field
The invention belongs to the technical field of pipeline hydraulic equipment, and particularly relates to a hydraulic reversing valve.
Background
In pipeline hydraulic pressure machinery, use the screw rod drilling tool to assemble into pipeline robot usually and get into the inside operation that carries out of pipeline, specifically adopt a plurality of threaded work nipple joints to connect, stretch into inside the pipeline, wherein the integration has hydraulic system and control system etc. in the work nipple joint. Due to the limitation of the diameter of the pipeline and the complex working environment in the pipeline, the components such as a hydraulic system and the like integrated in the screw drill tool need to be specially designed, and the standard requirement is higher.
The structure of the common hydraulic reversing valve is an independent valve seat and an independent valve body, and the common hydraulic reversing valve is difficult to integrate in a screw drilling tool. Because the environment in the pipeline is complex, the hydraulic pump has long working fluid conveying distance, the pumping pressure of the working fluid is high, and the working fluid in the hydraulic system flows fast, so that the change of the flow direction and the flow speed causes the change of the momentum of the fluid when the working fluid flows through the valve port, the valve core is under the action of hydraulic force, and the direction of the hydraulic force can prevent the valve core from moving, thereby increasing the difficulty of operating the valve core.
A small gap exists between a valve core and a valve body of the reversing valve, liquid can enter the gap to generate radial hydraulic pressure force on the valve core under the condition of high pressure and high flow rate, and when the radial hydraulic pressure force applied to the valve core is not uniformly distributed due to manufacturing errors and assembly errors of the reversing valve, the valve core can shake in the moving process and even generate dry friction with the valve body to further cause the valve core to be clamped.
Disclosure of Invention
The invention aims to provide a hydraulic reversing valve which can adapt to complex working conditions, and is safe to use, high in stability and simple to maintain.
The technical scheme adopted by the invention is as follows: a hydraulic reversing valve comprises a working pipe, wherein a square valve groove is formed in the long surface of the working pipe, a valve body is embedded into the valve groove, a valve core is installed in the valve body, and the valve core can move in the valve body.
The invention is also characterized in that:
two ends of the valve core are sleeved with split rings;
and third annular grooves are arranged on two sides of the valve body and embedded into the split rings.
The two ends of the valve body are connected with limiting blocks through screws.
The circumferential surface of the limiting block is provided with a first annular groove, and a first sealing ring is embedded in the first annular groove.
The two ends of the valve groove are provided with steps, the steps are connected with wedge blocks through bolts, and the wedge blocks are in contact with the limiting blocks.
The valve body is trapezoidal, and each inclined plane of the valve body is correspondingly matched with and pressed on the wedge block.
The valve core is provided with a convex plunger.
The number of the plungers is not less than one;
a saddle shape is adopted between each plunger of the valve core.
Triangular throttling grooves are arranged on the plungers at the two ends of the valve core.
A valve core adjusting port K, a working oil port A, a working oil port B and an oil inlet P are respectively arranged at one side of the working pipe; the valve core adjusting port K and the valve core adjusting port K are positioned at two ends of the working pipe; the working oil port A, the working oil port B and the oil inlet P are arranged in the middle of the working pipe, and the oil inlet P is arranged between the working oil port A and the working oil port B;
two oil discharge ports T are arranged on the other side of the working pipe;
the valve core adjusting port K, the working oil port A, the working oil port B, the oil inlet P and the two oil discharging ports T are communicated with the valve body.
The invention has the beneficial effects that: according to the hydraulic reversing valve, the valve body and the valve core are integrated in the working pipe in a unified manner, so that the pipeline operation is facilitated; the valve core can move in the valve body, so that the reversing can be easily realized, and the operation is simple; a saddle-shaped hydraulic cavity is formed between the plunger of the valve core and the valve body, so that high-pressure and high-speed liquid can flow conveniently, and the valve core can be prevented from sliding under the conditions of high pressure and high flow rate; the second annular groove is formed in the valve core, so that the influence of radial force on the performance of the reversing valve is reduced; the valve core is provided with a triangular throttling groove, so that the influence of transient hydrodynamic force on the reversing performance of the valve is reduced. The hydraulic reversing valve can be integrated in a working pipe, is convenient for pipeline operation and is simple and convenient to maintain.
Drawings
FIG. 1 is a schematic structural view of a hydraulic directional control valve of the present invention;
FIG. 2 is a schematic view of a valve core structure of a hydraulic directional control valve of the present invention;
FIG. 3 is a schematic illustration of a first reversing station of a hydraulic reversing valve of the present invention;
FIG. 4 is a schematic view of a second reversing station of a hydraulic reversing valve of the present invention.
In the figure: 1. the hydraulic control valve comprises a working pipe, 2 parts of a wedge block, 3 parts of a limiting block, 4 parts of an open ring, 5 parts of a valve groove, 6 parts of a valve core, 6-1 parts of a plunger, 7 parts of a valve body and 8 parts of a first sealing ring.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The invention provides a hydraulic reversing valve which comprises a working pipe 1, wherein a square valve groove 5 is formed in the longitudinal surface of the working pipe 1, a valve body 7 is embedded in the square valve groove 5, a valve core 6 is installed in the valve body 7, and the valve core 6 can move in the valve body 7, as shown in figure 1.
The two ends of the valve core 6 are sleeved with split rings 4; the split ring 4 positions the valve spool 6 as the valve spool 6 moves within the valve body 7.
And third annular grooves are formed in two sides of the valve body 7 and used for being embedded into the split rings 4 sleeved on the valve core 6.
The two ends of the valve body 7 are provided with limiting blocks 3 through screws, and the limiting blocks 3 are used for limiting the maximum stroke of the valve core 6 in the valve body 7.
Steps are arranged at two ends of the square valve groove 5, a wedge block 2 is connected at the steps through bolts, and the wedge block 2 is in contact with a limiting block 3.
The valve body 7 is trapezoidal, and each inclined plane of the valve body 7 is correspondingly matched with the compressed wedge block 2. The use of the wedge 2 prevents the valve body 7 from moving over the square valve spool 5.
The circumferential surface of the limiting block 3 is provided with a first annular groove, a first sealing ring 8 is embedded in the first annular groove, and the first sealing ring 8 prevents liquid leakage.
As shown in fig. 2, the valve core 6 is provided with a convex plunger 6-1, and the circumferential surface of the plunger 6-1 is provided with a second annular groove for reducing the influence of the radial force on the performance of the switch valve.
The number of the plungers 6-1 is not less than 3.
Triangular throttling grooves are formed in plungers 6-1 at two ends of the valve core 6, and influence of transient hydraulic power on valve performance is reduced through the throttling grooves.
As shown in figures 1 and 2, a saddle-shaped valve core structure is adopted between each plunger 6-1 of the valve core 6, and the saddle-shaped valve core structure and a special hydraulic cavity of the stroke of the valve body 7 are convenient for the inlet and outlet of high-pressure high-flow-rate liquid.
A valve core adjusting port K1, a valve core adjusting port K2, a working oil port A, a working oil port B and an oil inlet P are respectively arranged at one side of the working pipe 1; the valve core adjusting port K1 and the valve core adjusting port K2 are positioned at two ends of the working pipe 1; the working oil port A, the working oil port B and the oil inlet P are arranged in the middle of the working pipe 1, and the oil inlet P is arranged between the working oil port A and the working oil port B;
two oil discharge ports T are arranged on the other side of the working pipe 1;
the valve core adjusting port K1, the valve core adjusting port K2, the working oil port A, the working oil port B, the oil inlet P and the two oil discharging ports T are all communicated with the valve body 7;
the valve core adjusting port K1, the valve core adjusting port K2, the working oil port A, the working oil port B, the oil inlet P and the communicating port of the valve body 7 are respectively provided with a second sealing ring, and the T positions of the two oil discharging ports are respectively provided with a filter screen.
The invention relates to a working process of a hydraulic reversing valve, which comprises the following steps:
1. reversing for the first time: when the hydraulic reversing valve is reversed for the first time, as shown in fig. 1, when the valve core adjusting opening K1 enters liquid, the valve core 6 is pushed to the right side, the internal cavity space is contracted, the pressure of the hydraulic cavity is increased, at the moment, the working oil port a is communicated with the oil inlet P, the working liquid of the working oil port B flows out from the oil discharge port T, after the valve core 6 opens the split ring 4, the valve core 6 continues to advance, the split ring 4 is contracted and then the valve core 6 is positioned, at the moment, the reversing valve is positioned at the reversing station 3, as shown in fig. 3, the oil inlet P is communicated with the working oil port B, the working oil port a is communicated with the pressure relief port T, the hydraulic pipeline connected with the working oil port a is depressurized, and the working liquid.
2. And (3) reversing for the second time:
when the reversing valve reverses for the second time, the valve core adjusting opening K2 enters liquid, the valve core 6 pushes back, the valve core 6 props the split ring 4 to move back, the split ring 4 is reduced, then the valve core 6 is positioned, and at the moment, the reversing valve is located at the reversing station 4. As shown in fig. 4, at this time, the oil inlet P is communicated with the working oil port a, the working oil port B is communicated with the pressure relief port T, the hydraulic pipeline connected with the working oil port B is relieved, and the working fluid enters the working oil port a from the cavity through the oil inlet P and enters the hydraulic system.
Through the mode, the valve body 7 and the valve core 6 are integrated in the working pipe 1 in a unified manner, so that the hydraulic reversing valve is convenient for pipeline operation; the valve core 6 can move in the valve body 7, so that the reversing can be easily realized, and the operation is simple; a saddle-shaped hydraulic chamber is formed between the plunger 6-1 of the valve core 6 and the valve body 7, so that high-pressure and high-speed liquid can flow conveniently, and the valve core 6 can be prevented from sliding under the conditions of high pressure and high flow rate; the second annular groove is formed in the valve core 6, so that the influence of radial force on the performance of the reversing valve is reduced; the valve core 6 is provided with a triangular throttling groove, so that the influence of transient hydrodynamic force on the reversing performance of the valve is reduced. The hydraulic reversing valve can be integrated in the working pipe 1, so that the hydraulic reversing valve is convenient for pipeline operation and is simple and convenient to maintain.
Claims (5)
1. The hydraulic reversing valve is characterized by comprising a working pipe (1), wherein a square valve groove (5) is formed in the longitudinal surface of the working pipe (1), a valve body (7) is embedded in the valve groove (5), a valve core (6) is installed in the valve body (7), and the valve core (6) can move in the valve body (7);
the two ends of the valve core (6) are sleeved with split rings (4);
third annular grooves are formed in two sides of the valve body (7) and embedded into the split ring (4);
the two end parts of the valve body (7) are connected with limiting blocks (3) through screws;
steps are arranged at two ends of the valve groove (5), a wedge block (2) is connected to the steps through bolts, and the wedge block (2) is in contact with the limiting block (3);
a first annular groove is formed in the circumferential surface of the limiting block (3), and a first sealing ring (8) is embedded in the first annular groove;
the valve body (7) is trapezoidal, and each inclined plane of the valve body (7) is correspondingly matched and pressed on the wedge block (2).
2. A hydraulic directional control valve according to claim 1, characterized in that the spool (6) is provided with a raised plunger (6-1).
3. A hydraulic directional control valve according to claim 2, characterized in that the number of said plungers (6-1) is not less than 3;
the valve core (6) adopts a saddle shape between each plunger (6-1).
4. A hydraulic directional control valve according to claim 2 or 3, characterized in that the plungers (6-1) at both ends of the spool (6) are provided with triangular throttle grooves.
5. The hydraulic directional valve as set forth in claim 1, characterized in that a spool regulating port K1, a spool regulating port K2, a working oil port a, a working oil port B and an oil inlet P are respectively provided at one side of the working pipe (1); the valve core adjusting port K1 and the valve core adjusting port K2 are positioned at two ends of the working pipe (1); the working oil port A, the working oil port B and the oil inlet P are arranged in the middle of the working pipe (1), and the oil inlet P is arranged between the working oil port A and the working oil port B;
two oil discharge ports T are formed in the other side of the working pipe (1);
the valve core adjusting port K1, the valve core adjusting port K2, the working oil port A, the working oil port B, the oil inlet P and the two oil discharging ports T are all communicated with the valve body (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910027449.XA CN109611406B (en) | 2019-01-11 | 2019-01-11 | Hydraulic reversing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910027449.XA CN109611406B (en) | 2019-01-11 | 2019-01-11 | Hydraulic reversing valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109611406A CN109611406A (en) | 2019-04-12 |
| CN109611406B true CN109611406B (en) | 2020-11-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910027449.XA Active CN109611406B (en) | 2019-01-11 | 2019-01-11 | Hydraulic reversing valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109611406B (en) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2839687Y (en) * | 2005-07-22 | 2006-11-22 | 上海立新液压有限公司 | Two-position six-way guiding reversing valve |
| CN201155492Y (en) * | 2008-01-22 | 2008-11-26 | 山东法因数控机械股份有限公司 | Mechanical servo valve and hydraulic circuit applying same |
| CN201155592Y (en) * | 2008-02-26 | 2008-11-26 | 谢蔚敏 | Hydraulic change-over valve |
| CN201265571Y (en) * | 2008-10-08 | 2009-07-01 | 上海立新液压有限公司 | Novel hydraulic reversing valve |
| CN201836134U (en) * | 2010-05-11 | 2011-05-18 | 上海华岛液压设备制造有限公司 | Manual reversing valve |
| CN101893011A (en) * | 2010-07-30 | 2010-11-24 | 三一重工股份有限公司 | Hydraulic valve, hydraulic valve bank and control method thereof |
| CN205592212U (en) * | 2016-04-22 | 2016-09-21 | 济南弋泽展特机械有限公司 | Valve member convenient to installation |
-
2019
- 2019-01-11 CN CN201910027449.XA patent/CN109611406B/en active Active
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| CN109611406A (en) | 2019-04-12 |
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Effective date of registration: 20220623 Address after: 101100 room 221, building 14, tuanli new village, Songzhuang Town, Tongzhou District, Beijing Patentee after: Beijing chuhai Technology Co.,Ltd. Address before: 710048 No. 5 Jinhua South Road, Shaanxi, Xi'an Patentee before: XI'AN University OF TECHNOLOGY |