CN108561357B - Plug-in type proportional overflow valve - Google Patents
Plug-in type proportional overflow valve Download PDFInfo
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- CN108561357B CN108561357B CN201810055869.4A CN201810055869A CN108561357B CN 108561357 B CN108561357 B CN 108561357B CN 201810055869 A CN201810055869 A CN 201810055869A CN 108561357 B CN108561357 B CN 108561357B
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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
Abstract
The invention provides a plug-in proportional overflow valve, which comprises: the side wall of the valve body is provided with a T-shaped opening communicated with the inner hole of the valve body; the valve sleeve is fixedly connected to the lower part of the valve body, a P port is formed in the valve sleeve, a through-flow cavity is formed between the middle part of the valve sleeve and the valve body, an oil return cavity is formed between the upper part of the valve sleeve and an inner hole of the valve body, and a first through-flow hole communicated with the P port and the through-flow cavity is further formed in the valve sleeve; one end of the valve core assembly is arranged in the valve sleeve inner hole in a sliding mode, and the valve core assembly can control the connection and disconnection of the P port and the T port by sliding up and down along the valve sleeve inner hole; the spring assembly is arranged in the oil return cavity, a control cavity is formed between the upper part of the spring assembly and the valve body, and the spring assembly can change acting force on the valve core assembly according to the pressure of the control cavity; and the electric proportional control valve bank is arranged on the valve body, and the pressure of the control cavity can be changed by changing a voltage control signal of the electric proportional control valve bank. The plug-in type proportional overflow valve has the advantages of simple and compact structure, large through flow, high response speed and no leakage.
Description
Technical Field
The invention relates to the technical field of valves, in particular to a plug-in type proportional overflow valve.
Background
The proportional overflow valve is a control valve which utilizes current change to continuously and proportionally control the pressure of a liquid inlet, and is divided into a direct-acting proportional overflow valve and a pilot-operated proportional overflow valve according to a control mode, wherein the direct-acting proportional overflow valve controls the opening of a valve core by directly comparing the force output by a proportional electromagnet with a spring so as to control the pressure of an oil inlet, and the direct-acting proportional overflow valve has the advantages of high response speed and small leakage, but is only suitable for application occasions with small flow and low pressure because the output force of the proportional electromagnet is limited; the pilot type proportional overflow valve adopts a proportional pilot valve to control the pressure of a main valve element control cavity to realize the control of the opening size of a main valve element so as to control the pressure of an oil inlet, and has large through flow, slow response and large leakage. At present, in many practical applications, the requirements for large through-flow rate, high response speed and small leakage amount are required, and the requirements cannot be met by the conventional direct-acting proportional overflow valve and the conventional pilot-operated proportional overflow valve.
Disclosure of Invention
Aiming at part or all of the technical problems in the prior art, the invention provides a plug-in type proportional relief valve which is simpler and more compact in structure, large in through-flow rate, high in response speed and free of leakage.
In order to achieve the above object, the present invention provides a plug-in proportional relief valve having the following structure, including:
the valve body is provided with a stepped inner hole, and the side wall of the valve body is provided with a T-shaped opening communicated with the stepped inner hole;
the valve sleeve is fixedly connected to the lower part of the valve body, a P port is formed in the side wall of the lower part of the valve sleeve, a through-flow cavity is formed between the middle part of the valve sleeve and the valve body, an oil return cavity is formed between the upper part of the valve sleeve and an inner hole of the valve body, and a first through-flow hole communicated with the P port and the through-flow cavity is further formed in the valve sleeve;
one end of the valve core assembly is arranged in the valve sleeve inner hole in a sliding mode, and the valve core assembly can control the connection and disconnection of the P port and the T port by sliding up and down along the valve sleeve inner hole;
the spring assembly is arranged in the oil return cavity, the lower part of the spring assembly abuts against the upper part of the valve core assembly, a control cavity is formed between the upper part of the spring assembly and the valve body, and the spring assembly can change the acting force on the valve core assembly according to the pressure of the control cavity; and
and the electric proportional control valve bank is arranged on the valve body, an oil inlet of the electric proportional control valve bank is communicated with the through-flow cavity, an oil outlet of the electric proportional control valve bank is communicated with the T port, and the pressure of the control cavity can be changed by changing a voltage control signal of the electric proportional control valve bank.
In an embodiment, the case subassembly includes spring holder, steel ball and damping push rod, the spring holder with the spring subassembly lower part offsets, the steel ball is fixed the spring holder lower extreme, the damping push rod slides and sets up in the valve barrel hole and with the valve barrel hole is formed with the cushion chamber, damping push rod upper portion with the steel ball cooperatees, damping push rod middle part is the indent structure, damping push rod lower part with the valve barrel hole is clearance fit, P mouthful fluid passes through clearance communicates with each other with the cushion chamber.
In one embodiment, the spring assembly comprises a spring and a bushing, the bushing can slide up and down along the inner hole of the valve body, the upper end of the spring abuts against the bottom of the inner hole of the bushing, and the lower end of the spring abuts against the valve core assembly.
In one embodiment, the electric proportional control valve set includes an electromagnetic ball valve and a proportional overflow valve, the electromagnetic ball valve and the proportional overflow valve are connected in series, an oil inlet of the electromagnetic ball valve is communicated with the through-flow cavity, an oil inlet of the proportional overflow valve is communicated with an outlet of the electromagnetic ball valve and the control cavity, and an outlet of the proportional overflow valve is communicated with the T-port.
In one embodiment, when the electromagnetic ball valve is powered on, oil in the through flow cavity flows into the control cavity from the oil inlet of the electromagnetic ball valve, and when the electromagnetic ball valve is powered off, the through flow cavity and the control cavity are not communicated. In one embodiment, the valve body is provided with a first flow passage for communicating the oil inlet of the electromagnetic ball valve with the flow passage cavity, the valve body is provided with a second flow passage for communicating the oil outlet of the electromagnetic ball valve, the control cavity and the oil inlet of the proportional overflow valve, and the valve body is further provided with a third flow passage for communicating the outlet of the proportional overflow valve with the T port.
In one embodiment, the first flow passage comprises a damping hole and a second through hole, one end of the damping hole is communicated with the through cavity, the other end of the damping hole is communicated with one end of the second through hole, and the other end of the second through hole is communicated with the inlet of the electromagnetic ball valve.
In one embodiment, the second flow passage comprises a third through hole and a fourth through hole, the third through hole is arranged in the radial direction and communicates the oil outlet of the electromagnetic ball valve with the oil inlet of the proportional overflow valve, and the fourth through hole is arranged in the axial direction and communicates the third through hole with the control cavity.
In one embodiment, the third flow passage includes a fifth flow orifice which is disposed radially and which communicates with the oil outlet of the proportional relief valve, and a sixth flow orifice which is disposed axially and which communicates the fifth flow orifice with the T port.
Compared with the prior art, the plug-in type proportional overflow valve has the advantages that:
according to the invention, the pressure of the control cavity is changed by utilizing the small-flow electric proportional control valve group, so that the pressure of the spring assembly is set, and the force of a proportional electromagnet is not required to be directly compared with that of the spring, so that the large-diameter setting of the valve port can be realized, and the through-flow capacity is increased; the electromagnetic ball valve and the proportional overflow valve adopted by the electric proportional control valve group are both in line seal, and the valve core assembly is matched with the valve port and is also in line seal, so that the leakage rate is small; the invention is a direct-acting valve, and the pressure of the P port can be changed after the pressure of a control cavity is changed by the electric proportional control valve group, so the response speed is high; in addition, the invention has few parts, plug-in design, compact volume and low cost.
Drawings
Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, in which:
FIG. 1 is a schematic structural diagram of one embodiment of a plug-in proportional relief valve of the invention;
fig. 2 shows a hydraulic schematic diagram of the cartridge type proportional relief valve of the present invention.
In the drawings, like parts are provided with like reference numerals. The figures are not drawn to scale.
Detailed Description
In order to make the technical solutions and advantages of the present invention more apparent, exemplary embodiments of the present invention are described in further detail below with reference to the accompanying drawings. It is clear that the described embodiments are only a part of the embodiments of the invention, and not an exhaustive list of all embodiments. And the embodiments and features of the embodiments may be combined with each other without conflict.
An embodiment of the present invention provides a plug-in proportional relief valve, which is described below.
Fig. 1 shows one embodiment of the plug-in proportional relief valve of the present invention. In this embodiment, the plug-in proportional relief valve of the present invention mainly includes:
the valve body 7 is provided with a step-shaped inner hole, and the side wall of the valve body is provided with a T-shaped opening communicated with the step-shaped inner hole;
the valve sleeve 1 is fixedly connected to the lower part of the valve body 7, a P port is formed in the side wall of the lower part of the valve sleeve 7, a through flow cavity 7a is formed between the middle part of the valve sleeve 1 and the valve body 7, an oil return cavity 7b is formed in the upper part of the valve sleeve 1 and an inner hole of the valve body 7, and a first through flow hole 1a for communicating the P port with the through flow cavity 7a is further formed in the valve sleeve 1;
one end of the valve core component is arranged in the inner hole of the valve sleeve 1 in a sliding mode, and the valve core component can control the connection and disconnection of the P port and the T port by sliding up and down along the inner hole of the valve sleeve 1;
the spring assembly is arranged in the oil return cavity 7b, the lower part of the spring assembly abuts against the upper part of the valve core assembly, a control cavity 7c is formed by the upper part of the spring assembly and the valve body 7, and the spring assembly can change acting force on the valve core assembly according to the pressure of the control cavity 7 c; and
and the electric proportional control valve bank is arranged on the valve body 7, an oil inlet of the electric proportional control valve bank is communicated with the through-flow cavity 7a, an oil outlet of the electric proportional control valve bank is communicated with the T port, and the pressure of the control cavity 7c can be changed by changing a voltage control signal of the electric proportional control valve bank.
In one embodiment, as shown in fig. 1, the valve element assembly includes a spring seat 5, a steel ball 4 and a damping push rod 3, the spring seat 5 abuts against the lower portion of the spring assembly, the steel ball 4 is fixed at the lower end of the spring seat 5, the damping push rod 3 is slidably disposed in an inner hole of the valve housing 1 and forms a buffer cavity 1b with the inner hole of the valve housing 1, the upper portion of the damping push rod 3 is matched with the steel ball 4, the middle portion of the damping push rod 3 is of a concave structure, the lower portion of the damping push rod 3 is in clearance fit with the inner hole of the valve housing 1, and the P-port.
In one embodiment, as shown in fig. 1, the spring assembly comprises a spring 6 and a bushing 8, the bushing 8 can slide up and down along an inner hole of a valve body 7, the upper end of the spring 6 abuts against the bottom of the inner hole of the bushing 8, and the lower part of the spring 6 abuts against the valve core assembly.
In one embodiment, as shown in fig. 1, the electrical proportional control valve set includes an electromagnetic ball valve 10 and a proportional overflow valve 9, the electromagnetic ball valve 10 and the proportional overflow valve 9 are connected in series, an oil inlet of the electromagnetic ball valve 10 is communicated with the through-flow cavity 7a, an oil inlet of the proportional overflow valve 9 is communicated with an outlet of the electromagnetic ball valve 10 and the control cavity 7c, and an outlet of the proportional overflow valve 9 is communicated with the T port.
In one embodiment, when the electromagnetic ball valve 10 is powered on, oil in the through-flow cavity 7a flows into the control cavity 7c from an oil inlet of the electromagnetic ball valve 10, and when the electromagnetic ball valve 10 is powered off, the through-flow cavity 7a and the control cavity 7c are not communicated.
In one embodiment, a first flow passage communicating an oil inlet of the electromagnetic ball valve 10 and the through-flow cavity 7a is arranged on the valve body 7, a second flow passage communicating an oil outlet of the electromagnetic ball valve 10, the control cavity 7a and an oil inlet of the proportional overflow valve 9 is arranged on the valve body 7, and a third flow passage communicating an outlet and a T port of the proportional overflow valve 9 is further arranged on the valve body 7.
In one embodiment, the first flow passage includes a damping hole 71 and a second through hole 72, one end of the damping hole 71 communicates with the through cavity 7a, the other end of the damping hole 71 communicates with one end of the second through hole 72, and the other end of the second through hole 72 communicates with the inlet of the electromagnetic ball valve 10.
In one embodiment, as shown in fig. 1, the second flow passage includes a third through-hole 73 and a fourth through-hole 74, the third through-hole 73 is radially arranged and communicates the oil outlet of the electromagnetic ball valve 10 with the oil inlet of the proportional relief valve 9, and the fourth through-hole 74 is axially arranged and communicates the third through-hole 73 with the control chamber 7 c.
In one embodiment, the third flow passage includes a fifth flow orifice 75 and a sixth flow orifice 76, the fifth flow orifice 75 being disposed radially and communicating with the outlet port of the proportional relief valve 9, and the sixth flow orifice 76 being disposed axially and communicating the fifth flow orifice 75 with the T port.
In one embodiment, the operation principle of the plug-in type proportional relief valve of the invention is as follows:
when the plug-in proportional overflow valve works, oil flows into the buffer cavity 1b from the P port through a gap between the lower part of the damping push rod 3 and an inner hole of the valve sleeve 1, if the pressure of the P port exceeds the acting force of the spring assembly, the damping push rod 3 pushes the steel ball 4 upwards to open the valve port, the oil overflows to the oil return cavity 7b through the valve port and returns to the T port, and the pressure of the P port is maintained at the set pressure of the spring assembly.
When the pressure of the spring assembly is set, the electromagnetic ball valve 10 is powered on, meanwhile, a certain voltage signal of the proportional overflow valve 9 is given, oil enters the control cavity 7c from the port P through the first through-flow hole 1a, the through-flow cavity 7a, the damping hole 71, the second through-flow hole 72, the electromagnetic ball valve 10 and the third through-flow hole 73, the bushing 8 is pushed to move downwards to compress the spring 6 so as to complete the pressure setting, and after the setting is completed, the electromagnetic ball valve 10 is powered off, and the proportional overflow valve 9 keeps the set voltage; the proportional overflow valve 9 can control the pressure of the control cavity 7c according to the magnitude of the input voltage signal, for example, if 0V voltage is given, the pressure of the control cavity 7c is 0MPa, 2V voltage is given, the pressure of the control cavity 7c is 3MPa, 4V voltage is given, the pressure of the control cavity 7c is 6MPa, and the pressure of the control cavity 7c is in direct proportion to the voltage signal, so that the compression force of the spring 6 can be changed by applying the pressure of the control cavity 7c to the bushing 8, and the pressure of the port P is changed.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, the appended claims are intended to be construed to include preferred embodiments and all such changes and/or modifications as fall within the scope of the invention, and all such changes and/or modifications as are made to the embodiments of the present invention are intended to be covered by the scope of the invention.
Claims (5)
1. The utility model provides a cartridge formula proportional relief valve which characterized in that includes:
the valve body is provided with a stepped inner hole, and the side wall of the valve body is provided with a T-shaped opening communicated with the stepped inner hole;
the valve sleeve is fixedly connected to the lower part of the valve body, a P port is formed in the side wall of the lower part of the valve sleeve, a through-flow cavity is formed between the middle part of the valve sleeve and the valve body, an oil return cavity is formed between the upper part of the valve sleeve and an inner hole of the valve body, and a first through-flow hole communicated with the P port and the through-flow cavity is further formed in the valve sleeve;
one end of the valve core assembly is arranged in the valve sleeve inner hole in a sliding mode, and the valve core assembly can control the connection and disconnection of the P port and the T port by sliding up and down along the valve sleeve inner hole; the valve element assembly comprises a spring seat, a steel ball and a damping push rod, the steel ball is fixed at the lower end of the spring seat, the damping push rod is arranged in the inner hole of the valve sleeve in a sliding mode and forms a buffer cavity with the inner hole of the valve sleeve, the upper portion of the damping push rod is matched with the steel ball, the middle portion of the damping push rod is of an inwards concave structure, the lower portion of the damping push rod is in clearance fit with the inner hole of the valve sleeve, and the P port oil is communicated with the buffer cavity through the clearance;
the spring assembly is arranged in the oil return cavity, the lower part of the spring assembly abuts against the upper part of the valve core assembly, a control cavity is formed between the upper part of the spring assembly and the valve body, and the spring assembly can change the acting force on the valve core assembly according to the pressure of the control cavity; the spring assembly comprises a spring and a bushing, the bushing can slide up and down along an inner hole of the valve body, the upper end of the spring abuts against the bottom of the inner hole of the bushing, and the lower part of the spring abuts against the spring seat; and
the electric proportional control valve bank is arranged on the valve body, an oil inlet of the electric proportional control valve bank is communicated with the through-flow cavity, an oil outlet of the electric proportional control valve bank is communicated with the T port, and the pressure of the control cavity can be changed by changing a voltage control signal of the electric proportional control valve bank; the electric proportional control valve group comprises an electromagnetic ball valve and a proportional overflow valve, the electromagnetic ball valve and the proportional overflow valve are connected in series, an oil inlet of the electromagnetic ball valve is communicated with the through-flow cavity, an oil inlet of the proportional overflow valve is communicated with an outlet of the electromagnetic ball valve and the control cavity, and an outlet of the proportional overflow valve is communicated with the T port; when the electromagnetic ball valve is powered on, oil in the through flow cavity flows into the control cavity from the oil inlet of the electromagnetic ball valve, and when the electromagnetic ball valve is powered off, the through flow cavity and the control cavity are not communicated.
2. The plug-in type proportional overflow valve of claim 1, wherein the valve body is provided with a first flow passage communicating the electromagnetic ball valve oil inlet and the flow passage chamber, the valve body is provided with a second flow passage communicating the electromagnetic ball valve oil outlet, the control chamber and the proportional overflow valve oil inlet, and the valve body is further provided with a third flow passage communicating the proportional overflow valve outlet and the T port.
3. The plug-in type proportional relief valve according to claim 2, characterized in that the first flow passage comprises a damping hole and a second through-flow hole, one end of the damping hole is communicated with the through-flow cavity, the other end of the damping hole is communicated with one end of the second through-flow hole, and the other end of the second through-flow hole is communicated with the inlet of the electromagnetic ball valve.
4. The plug-in type proportional overflow valve of claim 2, wherein the second flow channel comprises a third flow passing hole and a fourth flow passing hole, the third flow passing hole is arranged in a radial direction and communicates the oil outlet of the electromagnetic ball valve with the oil inlet of the proportional overflow valve, and the fourth flow passing hole is arranged in an axial direction and communicates the third flow passing hole with the control cavity.
5. The cartridge type proportional relief valve according to claim 2, characterized in that the third flow passage comprises a fifth flow orifice and a sixth flow orifice, the fifth flow orifice is arranged along the radial direction and communicated with the oil outlet of the proportional relief valve, and the sixth flow orifice is arranged along the axial direction and communicated with the fifth flow orifice and the T port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810055869.4A CN108561357B (en) | 2018-01-20 | 2018-01-20 | Plug-in type proportional overflow valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810055869.4A CN108561357B (en) | 2018-01-20 | 2018-01-20 | Plug-in type proportional overflow valve |
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| Publication Number | Publication Date |
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| CN108561357A CN108561357A (en) | 2018-09-21 |
| CN108561357B true CN108561357B (en) | 2020-11-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810055869.4A Active CN108561357B (en) | 2018-01-20 | 2018-01-20 | Plug-in type proportional overflow valve |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109185253B (en) * | 2018-10-22 | 2020-04-21 | 杭州诚臻工程机械有限公司 | Electromagnetic overflow valve |
| CN114183424B (en) * | 2021-11-30 | 2023-01-24 | 华中科技大学 | Damping element of adjustable distributing valve type, direct-acting overflow valve and pilot-operated overflow valve |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85202888U (en) * | 1985-07-11 | 1987-03-25 | 浙江大学 | 3-way plug-in electric controlled liquid ratio direction valve |
| JP2000120551A (en) * | 1998-10-16 | 2000-04-25 | Fuji Koki Corp | Pressure regulating valve for variable displacement compressor |
| DE10310587A1 (en) * | 2003-03-11 | 2004-09-23 | Bosch Rexroth Ag | Pilot actuated pressure relief valve, has pressure governor with a pressure governing piston acted upon towards the opening direction by a rule spring which axially overlaps with the valve spring |
| CN201090549Y (en) * | 2007-09-29 | 2008-07-23 | 北京华德液压工业集团有限责任公司技术中心 | Bipolar electrohydraulic lead outflow valve |
| CN201513402U (en) * | 2009-09-29 | 2010-06-23 | 山东泰丰液压设备有限公司 | Pilot-operated type proportional relief valve |
| CN102207112A (en) * | 2011-06-13 | 2011-10-05 | 江铃汽车股份有限公司 | Double electronic control pilot type electromagnetic relief valve |
| CN202545395U (en) * | 2012-03-23 | 2012-11-21 | 山东泰丰液压股份有限公司 | Pilot electrohydraulic proportional overflow valve |
| CN102678987A (en) * | 2012-05-04 | 2012-09-19 | 华中科技大学 | Seawater hydraulic overflow valve |
| CN104033437B (en) * | 2014-05-26 | 2016-06-29 | 浙江大学 | A kind of active proportional relief valve |
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Effective date of registration: 20201103 Address after: Room 301, unit 1, building 25, datangxia District 2, chuocheng street, Yiwu City, Jinhua City, Zhejiang Province Applicant after: Yiwu Siqi Industrial Design Co., Ltd Address before: 315000 No. 510 Chuangyuan Road, Ningbo National High-tech Zone, Zhejiang Province Applicant before: Shao Likun |
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