CN112431805B - Proportional pressure reducing valve integrating pressure stabilizing function - Google Patents
Proportional pressure reducing valve integrating pressure stabilizing function Download PDFInfo
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- CN112431805B CN112431805B CN202011403282.1A CN202011403282A CN112431805B CN 112431805 B CN112431805 B CN 112431805B CN 202011403282 A CN202011403282 A CN 202011403282A CN 112431805 B CN112431805 B CN 112431805B
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- 230000000087 stabilizing effect Effects 0.000 title claims abstract description 82
- 230000001105 regulatory effect Effects 0.000 claims abstract description 45
- 239000007788 liquid Substances 0.000 claims abstract description 36
- 238000007789 sealing Methods 0.000 claims description 20
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000006641 stabilisation Effects 0.000 abstract description 3
- 238000011105 stabilization Methods 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 71
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 239000010720 hydraulic oil Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- 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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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Fluid Pressure (AREA)
Abstract
The invention provides a proportional pressure reducing valve with an integrated pressure stabilizing function, and belongs to the field of pressure reducing valve manufacturing; the invention comprises the following steps: a valve body and a relief valve spool; an oil inlet pipe communicated with the pressure reducing valve core is arranged on the valve body, and a pressure stabilizing device is arranged on the oil inlet pipe; the voltage stabilizing device comprises: the valve comprises a spring, a pressure regulating cavity and a valve core for opening or closing the pressure stabilizing channel; the valve core can be arranged in the pressure stabilizing channel in a left-right sliding way, and the spring compresses the valve core so that the right end of the valve core is positioned in the closed pressure regulating cavity; the valve core is of a cylindrical structure, and a pressure regulating channel used for communicating the pressure regulating cavity with the liquid inlet is arranged in the valve core; the valve core moves leftwards against the restoring force of the spring to close or partially close the pressure stabilizing channel. The proportional pressure reducing valve integrating the pressure stabilizing function has the structure that the oil inlet is integrated with the pressure stabilizing function; when external fluctuation pressure oil flows into an oil inlet pipe of the proportional pressure reducing valve, pressure stabilization is needed through a pressure stabilizing function structure, so that the front pressure of a pressure reducing valve core of the proportional pressure reducing valve is limited in a certain pressure range, and therefore the external fluctuation pressure oil cannot influence the pressure reducing valve core of the proportional pressure reducing valve, and the stable and reliable output pressure of the proportional pressure reducing valve can be effectively ensured.
Description
Technical Field
The invention relates to a valve manufacturing technology, in particular to a proportional pressure reducing valve with an integrated pressure stabilizing function, and belongs to the technical field of hydraulic equipment manufacturing.
Background
The proportional pressure reducing valve belongs to hydraulic control valve series, and is suitable for machine tool, plastic machine, hydraulic test set and other equipment. The main application is as follows: the high-pressure liquid in the high-pressure and ultrahigh-pressure equipment and the high-pressure pipeline is discharged after being reduced to the low pressure required by the load by the valve by adopting the function of reducing the energy consumption by throttling, so that the pressure of the high-pressure system is uniformly reduced.
In the prior art, a pilot valve of a pilot type proportional reversing valve without main valve core displacement feedback is of a proportional pressure reducing valve structure, and the current is controlled by a given proportional pressure reducing valve, so that the output pressure of the proportional pressure reducing valve changes along with the magnitude of the control current, and the continuous displacement control of the main valve core is realized; the oil inlet of the proportional pressure reducing valve is introduced through the guiding port of the main valve, and can be communicated with the P port of the main valve according to the arrangement, and can also be independently controlled by additionally arranging an oil source.
The application working condition of the proportional reversing valve is complex, and the main valve P port and the guide port are often accompanied with conditions of high pressure, large flow, high-frequency pressure fluctuation, pressure step change and the like; because the proportional pressure reducing valve is used as the pilot valve, the output pressure is generally very small, and if the pressure of an oil inlet is accompanied with conditions such as high pressure, high flow, high-frequency pressure fluctuation, pressure step change and the like, the output pressure of the proportional pressure reducing valve is caused to fluctuate, so that the displacement of a main valve core fluctuates, and the working performance of the proportional reversing valve is affected.
Therefore, there is a need in the art for a proportional pressure relief valve that ensures a stable and reliable output pressure.
Disclosure of Invention
The invention provides a novel proportional pressure reducing valve with an integrated pressure stabilizing function, which solves the technical problems that in the prior art, the proportional pressure reducing valve is easy to damage due to vibration generated by frequent fluctuation of external pressure by integrating a pressure stabilizing mechanism at an oil inlet.
The proportional pressure reducing valve integrating the pressure stabilizing function comprises: a valve body and a relief valve spool; an oil inlet pipe communicated with the pressure reducing valve core is arranged on the valve body, and a pressure stabilizing device is arranged on the oil inlet pipe;
The oil inlet pipe is provided with a liquid inlet and a liquid outlet, and a pressure stabilizing channel is arranged between the liquid inlet and the liquid outlet; the voltage stabilizing device comprises: the valve comprises a spring, a pressure regulating cavity and a valve core for opening or closing the pressure stabilizing channel; the valve core can be arranged in the pressure stabilizing channel in a left-right sliding way, and the spring compresses the valve core so that the right end of the valve core is positioned in the closed pressure regulating cavity;
the valve core is of a cylindrical structure, and a pressure regulating channel used for communicating the pressure regulating cavity with the liquid inlet is arranged in the valve core;
the valve core moves leftwards against the restoring force of the spring to close or partially close the pressure stabilizing channel.
The proportional pressure reducing valve integrating the pressure stabilizing function comprises the pressure stabilizing device, wherein the pressure stabilizing device further comprises an oil return cavity; the valve body also comprises an oil return pipe; the spring is positioned in the oil return cavity, and the oil return cavity is communicated with the oil return pipe;
The oil return cavity is provided with an oil return port, and the left end of the valve core is a sealing end for sealing the oil return port; the valve core slides leftwards, so that the sealing end opens the oil return port, and the liquid inlet and the oil return pipe are communicated through the oil return port.
The proportional pressure reducing valve integrating the pressure stabilizing function is characterized in that one end of the spring is arranged in the oil return cavity, and the other end of the spring is provided with the positioning plate; a positioning groove is arranged at the center of the positioning plate; the valve core is provided with a positioning ball, and the valve core is contacted with the positioning groove through the positioning ball.
The proportional pressure reducing valve integrating the pressure stabilizing function is characterized in that a plurality of annular oil grooves are formed in the sealing end, and the sealing end passes through the annular oil grooves to close the oil return port.
The proportional pressure reducing valve integrating the pressure stabilizing function is characterized in that the side surface of the valve core is provided with a pressure regulating hole; one end of the pressure regulating channel is communicated with the pressure regulating hole, and the other end of the pressure regulating channel is communicated with the pressure regulating cavity.
The proportional pressure reducing valve integrating the pressure stabilizing function is characterized in that the right end of the valve core is an opening and closing end; the liquid outlet corresponds to the opening and closing end;
The valve core slides leftwards so that the opening and closing end gradually closes the liquid outlet.
The proportional pressure reducing valve integrating the pressure stabilizing function is characterized in that the liquid inlet corresponds to the left side of the valve core, and the liquid outlet corresponds to the right side of the valve core.
The proportional pressure reducing valve integrating the pressure stabilizing function is characterized in that the pressure regulating cavity is positioned on the right side of the valve core, and the oil return cavity is positioned on the left side of the valve core.
The proportional pressure reducing valve integrating the pressure stabilizing function is characterized in that the oil return cavity and the pressure regulating cavity are both of a detachable sealing structure.
The proportional pressure reducing valve integrating the pressure stabilizing function is characterized in that a proportional electromagnet is further arranged in the valve body; the proportional electromagnet is connected with the pressure reducing valve core.
The proportional pressure reducing valve integrating the pressure stabilizing function has the structure that the oil inlet is integrated with the pressure stabilizing function; when external fluctuation pressure oil flows into an oil inlet pipe of the proportional pressure reducing valve, pressure stabilization is needed through a pressure stabilizing function structure, so that the front pressure of a pressure reducing valve core of the proportional pressure reducing valve is limited in a certain pressure range, and therefore the external fluctuation pressure oil cannot influence the pressure reducing valve core of the proportional pressure reducing valve, and the stable and reliable output pressure of the proportional pressure reducing valve can be effectively ensured.
Simultaneously the utility model discloses the proportion relief pressure valve of integrated steady voltage function makes the motion that automatically regulated proportion was depressurized can steadily act, has improved reliability and the working life of system, has promoted the quality of final product.
Drawings
FIG. 1 is a schematic diagram of an external structure of a proportional pressure reducing valve with integrated pressure stabilizing function according to an embodiment of the present invention;
FIG. 2 is a schematic diagram showing a partial sectional structure of a proportional pressure reducing valve integrated with a pressure stabilizing function according to an embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view of FIG. 2 in an open state at A-A;
FIG. 4 is a schematic cross-sectional view of the closed state of FIG. 3;
FIG. 5 is a schematic cross-sectional view of the oil return state of FIG. 4;
Fig. 6 is a schematic diagram of the valve core in fig. 4.
Detailed Description
The proportional pressure reducing valve integrating the pressure stabilizing function can be made of the following materials, and is not limited to the following materials, for example: pressure reducing valve, proportional valve, electric control valve and other common components.
FIG. 1 is a schematic diagram of an external structure of a proportional pressure reducing valve with integrated pressure stabilizing function according to an embodiment of the present invention; FIGS. 2 and 3 are schematic cross-sectional views of an open state at A-A; and in conjunction with fig. 4 to 6.
The proportional pressure reducing valve integrating the pressure stabilizing function comprises: a valve body 92 and a relief valve spool 91; the valve body 92 is provided with an oil inlet pipe 10 communicated with the pressure reducing valve core, and the oil inlet pipe 10 is provided with a pressure stabilizing device; the pressure stabilizing device of the present embodiment is used for adjusting the entered hydraulic oil in advance so that the oil pressure range of the hydraulic oil inputted to the relief valve element is maintained within a fixed numerical range.
The oil inlet pipe 10 is provided with a liquid inlet 1 and a liquid outlet 2, and a pressure stabilizing channel is arranged between the liquid inlet 1 and the liquid outlet 2; it is obvious that the voltage stabilizing means are arranged on the voltage stabilizing channel.
The voltage stabilizing device comprises: a spring 5, a pressure regulating chamber 6, and a valve core 4 for opening or closing the pressure stabilizing channel; the valve core 4 is arranged in the pressure stabilizing channel in a left-right sliding way, and the spring 5 compresses the valve core 4 so that the right end of the valve core 4 is positioned in the closed pressure regulating cavity 6; that is, one of the ends of the valve spool 4 is used to seal the pressure regulating chamber 6, and the valve spool 4 is actuated according to the pressure in the pressure regulating chamber 6.
The valve core 4 is of a cylindrical structure, and a pressure regulating channel 40 for communicating the pressure regulating cavity 6 with the liquid inlet 1 is arranged in the valve core 4; therefore, the oil pressure in the pressure regulating cavity 6 is always the same as the oil pressure in the liquid inlet 1.
The spool 4 moves to the left against the spring restoring force to close or partially close the pressure stabilizing passage.
In the actual use process, as shown in fig. 3, if the oil pressure in the pressure regulating cavity 6 is too high, the valve core is pushed to slide leftwards, so that the section of the pressure stabilizing channel is reduced, and further the valve core moves continuously to thoroughly close the liquid outlet 2, thereby playing a role in automatically regulating the oil pressure.
The proportional pressure reducing valve integrating the pressure stabilizing function comprises a pressure stabilizing device, a pressure stabilizing device and a pressure stabilizing control device, wherein the pressure stabilizing device further comprises an oil return cavity; the valve body also comprises an oil return pipe 3; the spring 5 is positioned in the oil return cavity, and the oil return cavity is communicated with the oil return pipe 3; the oil pressure in the oil return pipe 3 defaults to zero, and high-pressure oil can be discharged to reduce the oil pressure and avoid continuous increase of the oil pressure.
The oil return cavity is provided with an oil return port, and the left end of the valve core 4 is a sealing end 41 for sealing the oil return port; the valve core 4 slides to the left, so that the sealing end 41 opens the oil return port, and the liquid inlet port 1 is communicated with the oil return pipe 3 through the oil return port.
As shown in fig. 5, when the oil pressure in the inlet 1 increases continuously, the oil pressure in the pressure regulating chamber 6 increases synchronously, so as to further push the valve core to move leftwards, and then open the oil return port, thereby dumping the high oil pressure in the inlet 1 and avoiding the continuous increase of the oil pressure.
The proportional pressure reducing valve integrating the pressure stabilizing function is characterized in that one end of the spring is installed in the oil return cavity, and the other end of the spring is provided with the positioning plate 50; a positioning groove is arranged at the center of the positioning plate; the valve core is provided with a positioning ball 410, and the valve core is contacted with the positioning groove through the positioning ball 410.
In general, the liquid inlet 1 corresponds to the left side of the valve element 4, and the liquid outlet 2 corresponds to the right side of the valve element 4. Of course, the whole structure can be reversely arranged according to the actual situation, and the left and right are only relative position relations.
In addition, the pressure regulating chamber 6 is located on the right side of the valve core 4, and the oil return chamber is located on the left side of the valve core 4.
Furthermore, in order to facilitate the adjustment and the inspection of the conditions and the maintenance requirements of the liquid in the pressure regulating cavity and the oil return cavity, the oil return cavity and the pressure regulating cavity 6 are both in a detachable sealing structure.
The proportional pressure reducing valve integrating the pressure stabilizing function of the present embodiment is characterized in that a plurality of annular oil grooves are provided on the sealing end 41, and the sealing end 41 passes through the plurality of annular oil grooves to close the oil return port. The annular oil groove is used for reducing sliding resistance, and the outer diameter of the sealing end 41 is used for sealing the oil return opening.
As shown in fig. 6, in the proportional pressure reducing valve with integrated pressure stabilizing function of the present embodiment, a pressure regulating hole 400 is formed on a side surface of the valve core 4; one end of the pressure regulating channel 40 is communicated with the pressure regulating hole 400, and the other end is communicated with the pressure regulating cavity 6.
The proportional pressure reducing valve integrating the pressure stabilizing function in the embodiment, wherein the right end of the valve core 4 is an opening and closing end 42; the liquid outlet 2 corresponds to the opening and closing end 42; the diameter of the open and close end 42 is larger than the diameter of the middle part of the valve core 4 so as to seal the liquid outlet 2.
The valve core 4 slides to the left to gradually close the opening and closing end 42 to the liquid outlet 2.
The proportional pressure reducing valve integrating the pressure stabilizing function is provided with a proportional electromagnet 90 in the valve body; the proportional electromagnet 90 is connected to the pressure relief valve element 91.
The proportional pressure reducing valve integrating the pressure stabilizing function has the structure that the oil inlet is integrated with the pressure stabilizing function; when external fluctuation pressure oil flows into an oil inlet pipe of the proportional pressure reducing valve, pressure stabilization is needed through a pressure stabilizing function structure, so that the front pressure of a pressure reducing valve core of the proportional pressure reducing valve is limited in a certain pressure range, and therefore the external fluctuation pressure oil cannot influence the pressure reducing valve core of the proportional pressure reducing valve, and the stable and reliable output pressure of the proportional pressure reducing valve can be effectively ensured.
Simultaneously the utility model discloses the proportion relief pressure valve of integrated steady voltage function makes the motion that automatically regulated proportion was depressurized can steadily act, has improved reliability and the working life of system, has promoted the quality of final product.
In addition, the proportional pressure reducing valve integrated with the pressure stabilizing function is low in manufacturing cost, compact in structural design, ingenious in structure, stable in starting and stopping, convenient to use and maintain and suitable for adjusting actions of proportional pressure reducing valves or reversing valves of various hydraulic systems.
It should be noted that the pressure stabilizing function of the invention can be integrated on other valve structures with pressure stabilizing and reducing requirements, and has the advantages of cost, small occupied installation space, compact structure and promotion to the working performance of the main valve core.
The foregoing embodiment numbers of the present invention are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments. From the description of the above embodiments, it will be apparent to those skilled in the art that the above example methods may be implemented by means of a superposition of some variants plus the necessary general techniques; of course, the method can also be realized by simplifying some important technical features. Based on such understanding, the technical solution of the present invention essentially or partly contributes to the prior art is: overall function and construction, and in combination with the construction described in connection with the various embodiments of the invention.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (9)
1. The utility model provides an integrated pressure stabilizing function's proportional pressure reducing valve which characterized in that includes: a valve body and a relief valve spool; an oil inlet pipe communicated with the pressure reducing valve core is arranged on the valve body, and a pressure stabilizing device is arranged on the oil inlet pipe;
The oil inlet pipe is provided with a liquid inlet and a liquid outlet, and a pressure stabilizing channel is arranged between the liquid inlet and the liquid outlet; the voltage stabilizing device comprises: the valve comprises a spring, a pressure regulating cavity and a valve core for opening or closing the pressure stabilizing channel; the valve core can be arranged in the pressure stabilizing channel in a left-right sliding way, and the spring compresses the valve core so that the right end of the valve core is positioned in the closed pressure regulating cavity;
the valve core is of a cylindrical structure, and a pressure regulating channel used for communicating the pressure regulating cavity with the liquid inlet is arranged in the valve core;
the valve core moves leftwards against the restoring force of the spring so as to close or partially close the pressure stabilizing channel;
The pressure stabilizing device further comprises an oil return cavity; the valve body also comprises an oil return pipe; the spring is positioned in the oil return cavity, and the oil return cavity is communicated with the oil return pipe;
The oil return cavity is provided with an oil return port, and the left end of the valve core is a sealing end for sealing the oil return port; the valve core slides leftwards, so that the sealing end opens the oil return port, and the liquid inlet and the oil return pipe are communicated through the oil return port.
2. The proportional pressure reducing valve integrated with the pressure stabilizing function according to claim 1, wherein one end of the spring is installed in the oil return cavity, and a positioning plate is arranged at the other end of the spring; a positioning groove is arranged at the center of the positioning plate; the valve core is provided with a positioning ball, and the valve core is contacted with the positioning groove through the positioning ball.
3. The proportional pressure reducing valve integrated with a pressure stabilizing function according to claim 1, wherein a plurality of annular oil grooves are provided on the sealing end, and the sealing end passes through the plurality of annular oil grooves to close the oil return port.
4. The proportional pressure reducing valve integrated with the pressure stabilizing function according to any one of claims 1 to 2, wherein a pressure regulating hole is formed in the side face of the valve core; one end of the pressure regulating channel is communicated with the pressure regulating hole, and the other end of the pressure regulating channel is communicated with the pressure regulating cavity.
5. The proportional pressure reducing valve integrated with the pressure stabilizing function according to any one of claims 1 to 2, wherein the right end of the valve core is an opening and closing end; the liquid outlet corresponds to the opening and closing end;
The valve core slides leftwards so that the opening and closing end gradually closes the liquid outlet.
6. The proportional pressure reducing valve integrated with the pressure stabilizing function according to any one of claims 1 to 2, wherein the liquid inlet corresponds to the left side of the valve core, and the liquid outlet corresponds to the right side of the valve core.
7. The proportional pressure reducing valve integrated with a pressure stabilizing function according to claim 1, wherein the pressure regulating cavity is located on the right side of the valve core, and the oil return cavity is located on the left side of the valve core.
8. The proportional pressure reducing valve integrated with the pressure stabilizing function according to claim 1, wherein the oil return cavity and the pressure regulating cavity are both of a detachable sealing structure.
9. The proportional pressure reducing valve integrated with the pressure stabilizing function according to claim 1, wherein a proportional electromagnet is further arranged in the valve body; the proportional electromagnet is connected with the pressure reducing valve core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011403282.1A CN112431805B (en) | 2020-12-04 | 2020-12-04 | Proportional pressure reducing valve integrating pressure stabilizing function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011403282.1A CN112431805B (en) | 2020-12-04 | 2020-12-04 | Proportional pressure reducing valve integrating pressure stabilizing function |
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| CN112431805A CN112431805A (en) | 2021-03-02 |
| CN112431805B true CN112431805B (en) | 2024-05-17 |
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