CN210423921U - Pilot-operated type electromagnetic valve - Google Patents
Pilot-operated type electromagnetic valve Download PDFInfo
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- CN210423921U CN210423921U CN201921160369.3U CN201921160369U CN210423921U CN 210423921 U CN210423921 U CN 210423921U CN 201921160369 U CN201921160369 U CN 201921160369U CN 210423921 U CN210423921 U CN 210423921U
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Abstract
The utility model discloses a pilot-operated solenoid valve, which comprises a shell, wherein the upper half part of the shell is provided with a pilot valve, and the lower half part of the shell is provided with a main valve; the pilot valve is formed by sequentially assembling a throttling orifice plate, a pilot valve, a pilot spring, a thimble, an electromagnet assembly and a sealing element from the right end of the shell; the main valve is formed by sequentially assembling a main spring, a main valve seat and a sealing element from the right end of the shell; the main valve is formed by installing a rubber ring, a lining, a rear valve, a large spring and a small spring on the front valve and screwing and fixing the front valve by threads between the guide parts of the front valve. The utility model has the advantages that the throttling device is added at the corresponding position of the pilot electromagnetic valve to control and adjust the response time; the pilot valve is designed to be a small-diameter cone valve structure, and the sealing performance is improved after grinding; the main valve is designed into a double-spring soft sealing structure so as to achieve the purposes of no leakage for a long time and guarantee that the rubber ring is not washed away by oil.
Description
Technical Field
The utility model belongs to fluid system solenoid valve field, the specially adapted leakproofness requires strictly, uses on the higher fluid system of on-off response time required precision.
Background
The pilot valve of the prior pilot type electromagnetic valve mostly adopts a steel ball structure, and the main valve mostly adopts a cone valve or ball valve structure, so that the sealing property is difficult to ensure; the valve with strict sealing requirement adopts a soft sealing structure, but has the problems of falling off, scratching and the like of the soft sealing structure under the condition of flushing oil. The valve sealing structure with sealing performance and long-term reliability is a long-term pursuit target in the industry.
In addition, the corresponding on and off time of the electromagnetic valve influences the corresponding rapidity and stability of the fluid system; too fast response time results in large pressure impact of the fluid system, or too slow response time affects stable operation of components behind the valve. The response time of the current traditional solenoid valve can not be controlled.
Therefore, a solenoid valve with strict and reliable sealing and controllable response time is urgently needed to meet the requirements of a fluid system with reliability, high sealing performance and high response time precision.
Disclosure of Invention
The utility model aims to provide a solenoid valve is sealed reliable, the controllable guide's formula solenoid valve of response time.
The task of the utility model is accomplished like this, including the casing, its characterized in that: the upper half part of the shell is provided with a pilot valve, and the lower half part of the shell is provided with a main valve;
the pilot valve is formed by sequentially assembling a throttling orifice plate, a pilot valve, a pilot spring, a thimble, an electromagnet assembly and a sealing element from the right end of the shell;
the main valve is formed by sequentially assembling a main spring, a main valve seat and a sealing element from the right end of the shell;
the main valve is formed by installing a rubber ring, a lining, a rear valve, a large spring and a small spring on the front valve and screwing and fixing the front valve by threads between the guide parts of the front valve.
The throttle orifice plate and the throttle nozzle are arranged on an oil inlet oil way and an oil outlet oil way of the control cavity, a small-diameter throttle orifice is processed on the throttle orifice plate, and the loading and pressure relief time of the control cavity is controlled by grinding and adjusting the size of the throttle orifice.
The pilot valve is a small-diameter cone valve.
The main valve is a double-spring soft sealing structure, the rear valve extends forwards under the action of large spring elasticity when the main valve is opened, meanwhile, the compression ratio of the rubber ring is increased, when the bushing is forced to overcome the small spring elasticity to move the main valve backwards to be closed, the rear valve moves backwards under the combined action of the large spring, the main spring and inlet hydraulic pressure to expose the rubber ring, and meanwhile, the rubber ring forms a sealing pair with the main valve seat under the combined action of the small spring and the inlet hydraulic pressure.
The electromagnetic valve is powered off, the pilot valve is opened under the action of the hydraulic pressure of the inlet oil, the inlet oil enters the control cavity through the throttle orifice plate, the main valve is in a closed state under the action of the valve reset spring and the pressure of the inlet oil, the electromagnetic valve is powered on, the pilot valve is closed under the action of the electromagnetic force, the oil in the control cavity flows to an outlet through the pilot valve control oil way through the throttle nozzle, the pressure in the control cavity is relieved, the hydraulic pressure of the main valve overcomes the force of the main spring and the low hydraulic pressure in the control cavity under the action of the inlet oil.
The utility model has the advantages that the throttling device is added at the corresponding position of the pilot electromagnetic valve to control and adjust the response time; the pilot valve is designed to be a small-diameter cone valve structure, and the sealing performance is improved after grinding; the main valve is designed into a double-spring soft sealing structure so as to achieve the purposes of no leakage for a long time and guarantee that the rubber ring is not washed away by oil.
Drawings
FIG. 1 is a schematic diagram of a power-off closing structure of a solenoid valve in the technical scheme; fig. 2 is a structural diagram of the solenoid valve of fig. 1 in an energized open state.
Description of the drawings: 1. the device comprises a shell, 2, a throttling orifice plate, 3, a pilot valve, 4, a pilot spring, 5, an ejector pin, 6, an electromagnet assembly, 7, a throttling nozzle, 8, a main valve seat, 9, a front valve, 10, a rubber ring, 11, a lining, 12, a rear valve, 13, a large spring, 14, a small spring, 15, a valve guide, 16 and a main spring.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.
The specific implementation mode is as follows: the pilot electromagnetic valve is a two-position three-way electromagnetic valve, the pilot valve part and the main valve part are connected through three holes on the shell 1, the pilot valve is arranged on the upper half part of the shell 1, and the main valve is arranged on the lower half part of the shell;
the pilot valve is formed by sequentially installing a throttling orifice plate 2, a pilot valve 3, a pilot spring 4, a thimble 5, an electromagnet assembly 6 and a sealing element from the right end of the shell; the main valve is formed by sequentially assembling a main spring 16, a main valve seat 8 and a sealing element from the right end of the shell;
the main valve is formed by installing a rubber ring 10, a bush 11, a rear valve 12, a large spring 13 and a small spring 14 on the front valve 9 and screwing and fixing the front valve through threads between front valve guides 15.
The throttle valve is characterized in that a throttle nozzle 7 is arranged on the main valve seat, the throttle orifice plate and the throttle nozzle are arranged on an oil inlet oil way and an oil outlet oil way of the control cavity, a small-diameter throttle orifice is machined in the throttle orifice plate in advance, the loading and pressure relief time of the control cavity can be controlled by adjusting the size of the throttle orifice through grinding, and the response time is controlled accurately.
The pilot valve is a small-diameter cone valve, and is not leaked when the diameter of the pilot valve reaches 30mm through grinding.
The main valve is a double-spring soft sealing structure, when the main valve is opened, the rear valve extends forwards under the action of large spring elasticity, the compression rate of the rubber ring is increased, the bushing is forced to move backwards to overcome the small spring elasticity so as to ensure that the rubber ring has enough deformation space, and the rubber ring is sealed in an approximately closed space formed by the front valve, the rear valve and the bushing, so that the rubber ring is prevented from being washed away by large-flow oil flowing through the electromagnetic valve; when the main valve is closed, the rear valve moves backwards under the combined action of the large spring, the main spring and the inlet hydraulic pressure to expose the rubber ring, and the rubber ring and the main valve seat form a sealing pair under the combined action of the small spring and the inlet hydraulic pressure to achieve the effect of long-term no leakage.
According to the technical scheme, the response time is adjusted through the size of a throttling hole machined in the throttling hole plate, the high sealing requirement is met by grinding the conical pilot valve, the long-term non-leakage index is achieved through the main valve of the double-spring soft sealing structure, and the rubber ring is guaranteed not to be washed away by oil.
The electromagnetic valve is powered off, the pilot valve is opened under the action of the hydraulic pressure of the inlet oil, the inlet oil enters the control cavity through the throttle orifice plate, the main valve is in a closed state under the action of the valve reset spring and the pressure of the inlet oil, the electromagnetic valve is powered on, the pilot valve is closed under the action of the electromagnetic force, the oil in the control cavity flows to an outlet through the pilot valve control oil way through the throttle nozzle, the pressure in the control cavity is relieved, the hydraulic pressure of the main valve overcomes the force of the main spring and the low hydraulic pressure in the control cavity under the action of the inlet oil.
The electromagnetic valve power-off closing time is controlled by adjusting the size of the throttling hole plate, the throttling hole is large, the inlet is fast pressed to a control cavity system, the closing time is short, otherwise, the throttling hole is small, the electromagnetic valve power-on opening time is controlled by adjusting the size of the throttling hole of the throttling nozzle, the throttling hole is large, the control cavity is fast decompressed to the outlet, the opening time is short, and otherwise, the throttling hole is small.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected, and may communicate between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
Claims (5)
1. A pilot operated solenoid valve, comprising a housing, characterized in that: the upper half part of the shell is provided with a pilot valve, and the lower half part of the shell is provided with a main valve;
the pilot valve is formed by sequentially assembling a throttling orifice plate, a pilot valve, a pilot spring, a thimble, an electromagnet assembly and a sealing element from the right end of the shell;
the main valve is formed by sequentially assembling a main spring, a main valve seat and a sealing element from the right end of the shell;
the main valve is formed by installing a rubber ring, a lining, a rear valve, a large spring and a small spring on the front valve and screwing and fixing the front valve by threads between the guide parts of the front valve.
2. A pilot operated solenoid valve according to claim 1 wherein: the throttle orifice plate and the throttle nozzle are arranged on an oil inlet oil way and an oil outlet oil way of the control cavity, a small-diameter throttle orifice is processed on the throttle orifice plate, and the loading and pressure relief time of the control cavity is controlled by grinding and adjusting the size of the throttle orifice.
3. A pilot operated solenoid valve according to claim 1 wherein: the pilot valve is a small-diameter cone valve.
4. A pilot operated solenoid valve according to claim 1 wherein: the main valve is a double-spring soft sealing structure, the rear valve extends forwards under the action of large spring elasticity when the main valve is opened, meanwhile, the compression ratio of the rubber ring is increased, when the bushing is forced to overcome the small spring elasticity to move the main valve backwards to be closed, the rear valve moves backwards under the combined action of the large spring, the main spring and inlet hydraulic pressure to expose the rubber ring, and meanwhile, the rubber ring forms a sealing pair with the main valve seat under the combined action of the small spring and the inlet hydraulic pressure.
5. A pilot operated solenoid valve according to claim 1 wherein: the electromagnetic valve is powered off, the pilot valve is opened under the action of the hydraulic pressure of the inlet oil, the inlet oil enters the control cavity through the throttle orifice plate, the main valve is in a closed state under the action of the valve reset spring and the pressure of the inlet oil, the electromagnetic valve is powered on, the pilot valve is closed under the action of the electromagnetic force, the oil in the control cavity flows to an outlet through the pilot valve control oil way through the throttle nozzle, the pressure in the control cavity is relieved, the hydraulic pressure of the main valve overcomes the force of the main spring and the low hydraulic pressure in the control cavity under the action of the inlet oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921160369.3U CN210423921U (en) | 2019-07-23 | 2019-07-23 | Pilot-operated type electromagnetic valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921160369.3U CN210423921U (en) | 2019-07-23 | 2019-07-23 | Pilot-operated type electromagnetic valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210423921U true CN210423921U (en) | 2020-04-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921160369.3U Active CN210423921U (en) | 2019-07-23 | 2019-07-23 | Pilot-operated type electromagnetic valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210423921U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113700929A (en) * | 2021-08-29 | 2021-11-26 | 中国船舶重工集团公司第七一九研究所 | Pilot-operated high-pressure air electromagnetic valve |
-
2019
- 2019-07-23 CN CN201921160369.3U patent/CN210423921U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113700929A (en) * | 2021-08-29 | 2021-11-26 | 中国船舶重工集团公司第七一九研究所 | Pilot-operated high-pressure air electromagnetic valve |
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