CN111255761B - Hydraulic control reversing pressure reducing valve - Google Patents
Hydraulic control reversing pressure reducing valve Download PDFInfo
- Publication number
- CN111255761B CN111255761B CN202010061505.4A CN202010061505A CN111255761B CN 111255761 B CN111255761 B CN 111255761B CN 202010061505 A CN202010061505 A CN 202010061505A CN 111255761 B CN111255761 B CN 111255761B
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- Prior art keywords
- valve
- port
- hole
- pressure reducing
- communicated
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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
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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
- F15B13/025—Pressure reducing valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/06—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
- F16K11/065—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members
- F16K11/07—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with cylindrical slides
- F16K11/0716—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with cylindrical slides with fluid passages through the valve member
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/0473—Multiple-way safety 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
- F15B2013/002—Modular valves, i.e. consisting of an assembly of interchangeable components
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Safety Valves (AREA)
Abstract
The invention provides a hydraulic control reversing pressure reducing valve, and relates to the technical field of valve components. The valve sleeve is provided with a P port, a Br port and an L port; the valve core is inserted in the valve sleeve, a first through hole and a second through hole which are communicated are formed in the valve core, a damping groove is formed in the valve core, and when the pressure in the valve core reaches a preset value, the damping groove is communicated with the Br port and the L port; the valve core can move axially in the valve sleeve; the valve core can axially move in the valve sleeve to realize the conversion between a working state and a closing state, and in the working state, the P port is communicated with the second through hole, and the Br port is communicated with the first through hole; in the closed state, the Br port is not communicated with the first through hole. The hydraulic control reversing valve and the pressure reducing valve are integrated, so that the hydraulic control reversing valve is compact in structure, small in occupied space and low in cost.
Description
Technical Field
The invention belongs to the technical field of valve components, and relates to a hydraulic control reversing pressure reducing valve.
Background
In the field of engineering machinery, a hydraulic control reversing valve is matched with a pressure reducing valve for use, because in the actual use process of the hydraulic control reversing valve, if high pressure is directly input, a sealing member of a brake is easy to damage, and then the valve fails. Therefore, in the prior art, two valves, namely a pilot operated directional control valve and a pressure reducing valve, are usually inserted into a valve body, and the two valves are combined to achieve the effect, for example, a hydraulic pilot operated directional control valve with low directional impact is disclosed in CN 205349894U. However, this involves problems of large space occupation, complex installation and high costs.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a hydraulic control reversing pressure reducing valve integrating a hydraulic control reversing valve and a pressure reducing valve.
The purpose of the invention can be realized by the following technical scheme: a hydraulically controlled reversing pressure relief valve comprising:
the valve sleeve is provided with a P port, a Br port and an L port;
the valve core is inserted in the valve sleeve, a first through hole and a second through hole which are communicated are formed in the valve core, a damping groove is formed in the valve core, and when the pressure in the valve core reaches a preset value, the damping groove is communicated with the Br port and the L port;
the valve core can axially move in the valve sleeve to realize the conversion between the working state and the closing state of the hydraulic control reversing pressure reducing valve; in the working state, the P port is communicated with the second through hole, and the Br port is communicated with the first through hole; in the closed state, the Br port is not communicated with the first through hole.
As a further improvement of the invention, two ends of the valve sleeve are respectively provided with a cover cap and a sealing plug screw.
As a further improvement of the invention, the cap is connected with the end part of the valve sleeve in a sealing way through a nut.
As a further improvement of the invention, an adjusting rod is arranged on the inner side of the cap.
As a further improvement of the invention, a spring seat is also arranged in the valve sleeve, one end of the adjusting rod, which is far away from the cover cap, is abutted against the spring seat, and the spring seat is elastically connected with the valve core through a spring.
As a further improvement of the invention, the valve core is abutted with the sealing screw plug.
As a further improvement of the invention, the valve sleeve is provided with a P port, a Br port and an L port from one end of the sealing screw plug to one end of the cap in sequence.
As a further improvement of the invention, a first groove is circumferentially arranged on one side of the first through hole, which faces the valve sleeve; and a second groove is circumferentially arranged on one side, facing the valve sleeve, of the second through hole.
Based on the technical scheme, the embodiment of the invention can at least produce the following technical effects: the invention integrates the reversing function and the pressure reducing function into a whole by arranging the valve core, the P port and the Br port are communicated with the second through hole through the first through hole in the working state to realize the reversing function, and when the pressure exceeds a limit value, a medium in the valve core flows to the L port from the Br port through the damping groove to realize the pressure reducing function. The hydraulic control reversing valve and the pressure reducing valve are integrated, so that the hydraulic control reversing valve is compact in structure, small in occupied space and low in cost.
Drawings
Embodiments of the invention are described in further detail below with reference to the attached drawing figures, wherein:
FIG. 1 is a cross-sectional view of the pilot operated directional relief valve of the present invention in a closed condition.
FIG. 2 is a cross-sectional view of the pilot operated directional relief valve of the present invention in an open condition.
FIG. 3 is a schematic diagram of the pilot operated directional relief valve of the present invention.
Fig. 4 is a schematic view of the structure of the valve sleeve.
Fig. 5 is a schematic view of the valve cartridge.
Fig. 6 is a cross-sectional view of the valve cartridge.
In the figure, 100, the valve housing; 110. capping; 120. a nut; 130. a port P; 140. a Br port; 150. an L port; 160. sealing the screw plug; 200. a valve core; 210. adjusting a rod; 220. a spring seat; 230. a spring; 241. a first through hole; 242. a first groove; 251. a second through hole; 252. a second groove; 260. a channel; 270. a damping slot.
Detailed Description
The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.
The technical solution provided by the present invention is explained in more detail with reference to fig. 1 to 6.
In the prior art, a hydraulic control reversing valve and a pressure reducing valve are commonly used threaded cartridge valves, and in a specific hydraulic valve, cartridge combination is carried out as required. In order to prevent high pressure from affecting the sealing performance of the brake, a pressure reducing valve is selected to limit pressure so as to ensure that the sealing element in the brake is not damaged.
The pilot operated directional relief valve to be protected by the present invention includes a valve housing 100 and a valve core 200.
As shown in fig. 1 and 4, the valve housing 100 is provided with a P port 130, a Br port 140, and an L port 150. Wherein, P mouth 130 is the oil inlet, Br mouth 140 is the oil-out, L mouth 150 is the oil discharge mouth, Br mouth 140 connects the stopper.
As shown in fig. 5 and 6, the valve core 200 is inserted into the valve housing 100, the valve core 200 is provided with a first through hole 241 and a second through hole 251 which are communicated with each other, and specifically, the first through hole 241 and the second through hole 251 are communicated with each other through a channel 260 provided inside the valve core 200. The distance between the first through hole 241 and the second through hole 251 is smaller than the distance between the P port 130 and the Br port 140.
Specifically, the first through hole 241 is circumferentially provided with a first groove 242 facing one side of the valve housing 100; the second through hole 251 is circumferentially provided with a second groove 252 towards one side of the valve sleeve 100, and the arrangement of the first groove 242 and the second groove 252 expands the communication range of the P port 130 and the second through hole 251, and the Br port 140 and the first through hole 241, so that the communication of the P port 130 and the second through hole 251, and the Br port 140 and the first through hole 241 is smoother, and the communication effect is improved.
The hydraulic control reversing pressure reducing valve has a closing state and a working state, and the valve core 200 can axially move in the valve sleeve 100 to realize the conversion between the working state and the closing state of the hydraulic control reversing pressure reducing valve; in a closed state, the P port 130 is communicated with the second through hole 251, and the Br port 140 is not communicated with the first through hole 241; in the working state, the P port 130 communicates with the second through hole 251, and the Br port 140 communicates with the first through hole 241.
The valve core 200 is provided with a damping groove 270, the Br port 140 is communicated with the L port 150 through the damping groove 270, and the L port 150 is not contacted with the valve core 200; specifically, the damping groove 270 is a flat surface cut from the outer surface of the valve body 200. In practical applications, the damping slot 270 may have various shapes, including but not limited to the examples given in this embodiment, and the damping slot 270 capable of damping is within the protection scope of the present invention.
Further, a cap 110 and a sealing plug 160 are respectively disposed at both ends of the valve housing 100. The seal plug screw 160 is an E-shaped seal plug screw 160, so as to improve the sealing performance of the valve body.
Further, the cap 110 is sealingly coupled to the end of the valve housing 100 by a nut 120.
Further, an adjusting rod 210 is disposed inside the cap 110. The adjustment rod 210 performs an adjustment function to adjust the output pressure.
The valve sleeve 100 is further provided with a spring seat 220, one end of the adjusting rod 210, which is far away from the cap 110, abuts against the spring seat 220, and the spring seat 220 is elastically connected with the valve core 200 through a spring 230. The valve core 200 is movable along an axis in the valve housing 100, thereby realizing the switching between the closed state and the working state.
Further, in the closed state, the valve element 200 abuts against the seal plug screw 160; in the working state, the valve core 200 is separated from the sealing plug screw 160.
Further, the valve housing 100 is provided with a P port 130, a Br port 140, and an L port 150 in this order from one end of the sealing plug 160 to one end of the cap 110.
The working principle of the pilot-controlled reversing pressure reducing valve is as follows, as shown in fig. 1 to 3:
1. in the closed state, under the elastic action of the spring 230, the valve core 200 abuts against the seal screw plug 160, the P port 130 is communicated with the second through hole 251, and the Br port 140 is not communicated with the first through hole 241.
2. In the working state, the medium flows to the channel 260 through the P port 130, the pressure generated by the medium counteracts the elastic force of the spring 230, the spring 230 is continuously compressed, and meanwhile, the valve core 200 moves towards one end of the cap 110 until the Br port 140 is communicated with the first through hole 241 through the first groove 242, so that the medium enters from the P port 130 and exits from the Br port 140, and the brake is started.
3. In a decompression state, when the pressure in the pilot-controlled reversing decompression valve exceeds a rated value, the medium in the Br port 140 flows to the L port 150 through the damping groove 270, so that the pressure in the pilot-controlled reversing decompression valve is ensured not to exceed the rated value.
The invention creatively integrates the reversing valve and the pressure reducing valve into a whole, optimizes the structure of the hydraulic control reversing pressure reducing valve, reduces the volume of the valve body and reduces the cost.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Claims (8)
1. The liquid accuse switching-over relief pressure valve, its characterized in that includes:
the valve sleeve is provided with a P port, a Br port and an L port;
the valve core is inserted in the valve sleeve, a first through hole and a second through hole which are communicated are formed in the valve core, a damping groove is formed in the valve core, and when the pressure in the valve core reaches a preset value, the damping groove is communicated with the Br port and the L port;
the valve core can axially move in the valve sleeve to realize the conversion between the working state and the closing state of the hydraulic control reversing pressure reducing valve; in the working state, the P port is communicated with the second through hole, and the Br port is communicated with the first through hole; in the closed state, the Br port is not communicated with the first through hole.
2. The pilot-controlled reversing pressure reducing valve as claimed in claim 1, wherein a cap and a sealing plug screw are respectively arranged at two ends of the valve sleeve.
3. The pilot-controlled directional pressure reducing valve as claimed in claim 2, wherein the cap is sealingly connected to the end of the valve housing by a nut.
4. The pilot-controlled reversing pressure reducing valve as claimed in claim 2, wherein an adjusting rod is arranged on the inner side of the cap.
5. The pilot-controlled reversing pressure reducing valve as claimed in claim 4, wherein a spring seat is further arranged in the valve sleeve, one end of the adjusting rod, which is far away from the cap, abuts against the spring seat, and the spring seat is elastically connected with the valve core through a spring.
6. The pilot-operated directional relief valve according to claim 2, wherein the spool abuts against the seal plug screw.
7. The pilot-controlled reversing pressure reducing valve as claimed in claim 2, wherein the valve housing is provided with a port P, a port Br and a port L in sequence from one end of the sealing plug to one end of the cap.
8. The pilot-controlled reversing pressure reducing valve according to claim 1, wherein the first through hole is circumferentially provided with a first groove toward one side of the valve sleeve; and a second groove is circumferentially arranged on one side, facing the valve sleeve, of the second through hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010061505.4A CN111255761B (en) | 2020-01-19 | 2020-01-19 | Hydraulic control reversing pressure reducing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010061505.4A CN111255761B (en) | 2020-01-19 | 2020-01-19 | Hydraulic control reversing pressure reducing valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111255761A CN111255761A (en) | 2020-06-09 |
| CN111255761B true CN111255761B (en) | 2022-04-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010061505.4A Active CN111255761B (en) | 2020-01-19 | 2020-01-19 | Hydraulic control reversing pressure reducing valve |
Country Status (1)
| Country | Link |
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| CN (1) | CN111255761B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1040420A (en) * | 1989-05-19 | 1990-03-14 | 刘长年 | Multifunctional floating pressure control valve |
| CN102562699A (en) * | 2011-12-16 | 2012-07-11 | 中联重科股份有限公司 | Balanced valve, hydraulic cylinder expansion control loop and crane |
| CN102979775A (en) * | 2012-11-16 | 2013-03-20 | 中联重科股份有限公司 | Engineering machinery and hydraulic control operation system thereof |
| DE102013015774A1 (en) * | 2013-09-21 | 2015-03-26 | Bieri Hydraulik Ag | Valve device and hydraulic system |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201875226U (en) * | 2010-11-09 | 2011-06-22 | 韩晓新 | Sequence valve |
| CN203656291U (en) * | 2014-01-21 | 2014-06-18 | 宁波市镇海华力液压机电有限公司 | Stacked pressure reducing valve |
| DE102014003086A1 (en) * | 2014-03-01 | 2015-09-03 | Hydac Filtertechnik Gmbh | valve device |
| CN104373403A (en) * | 2014-11-19 | 2015-02-25 | 上海立新液压有限公司 | Plugging tee-type proportional pressure reducing valve |
| DE102015016846A1 (en) * | 2015-12-23 | 2017-06-29 | Hydac Fluidtechnik Gmbh | Valve, in particular 4/2 directional spool valve |
| CN205371728U (en) * | 2016-02-02 | 2016-07-06 | 南京航海仪器二厂有限公司 | Quick off -load relief valve |
| CN106382269B (en) * | 2016-09-22 | 2017-10-20 | 安徽理工大学 | It is a kind of that there is speed governing, commutation, the combination valve of relief function |
| CN107883015A (en) * | 2017-10-11 | 2018-04-06 | 中国航发西安动力控制科技有限公司 | A kind of air pressure adaptive servo valve |
| CN110671520B (en) * | 2019-10-12 | 2020-11-06 | 广东泰恩流体控制设备有限公司 | One-way pressure reducing valve with safety function |
-
2020
- 2020-01-19 CN CN202010061505.4A patent/CN111255761B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1040420A (en) * | 1989-05-19 | 1990-03-14 | 刘长年 | Multifunctional floating pressure control valve |
| CN102562699A (en) * | 2011-12-16 | 2012-07-11 | 中联重科股份有限公司 | Balanced valve, hydraulic cylinder expansion control loop and crane |
| CN102979775A (en) * | 2012-11-16 | 2013-03-20 | 中联重科股份有限公司 | Engineering machinery and hydraulic control operation system thereof |
| DE102013015774A1 (en) * | 2013-09-21 | 2015-03-26 | Bieri Hydraulik Ag | Valve device and hydraulic system |
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| Publication number | Publication date |
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| CN111255761A (en) | 2020-06-09 |
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Address after: No.98 xingyong Road, Jiangbei District, Ningbo City, Zhejiang Province Applicant after: Ningbo Yuzhou Hydraulic Equipment Co.,Ltd. Address before: No.98 xingyong Road, Jiangbei District, Ningbo City, Zhejiang Province Applicant before: NINGBO JIANGBEI YUZHOU HYDRAULIC EQUIPMENT FACTORY |
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