CN106641398B - Large-caliber pilot unloading type electromagnetic valve - Google Patents
Large-caliber pilot unloading type electromagnetic valve Download PDFInfo
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- CN106641398B CN106641398B CN201611251613.8A CN201611251613A CN106641398B CN 106641398 B CN106641398 B CN 106641398B CN 201611251613 A CN201611251613 A CN 201611251613A CN 106641398 B CN106641398 B CN 106641398B
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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
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0644—One-way valve
- F16K31/0655—Lift valves
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Abstract
A large-caliber pilot unloading type electromagnetic valve comprises a valve body, a valve cover, a valve core assembly and an electromagnetic drive control assembly; the valve core assembly comprises a main valve core and a guide valve core; the main valve core is positioned at the valve seat; the upper part of the main valve core is of a cylinder structure, and the bottom of the cylinder structure is provided with a pressure relief hole; the main valve core is also provided with a throttling hole and a communicating hole; the throttle hole is positioned on the medium inlet side of the valve body; one end of the communicating hole is communicated with the upper cavity of the main valve core, and the other end of the communicating hole is communicated with the pressure relief hole; the guide valve core is embedded in the cylindrical structure of the main valve core, and a guide ring is arranged between the main valve core and the guide valve core; when the guide valve core moves, the main valve core is driven to move by the guide ring; the electromagnetic valve also comprises a diaphragm; the inner edge part of the diaphragm is fixedly connected with the main valve core, and the outer edge part of the diaphragm is fixedly connected with the valve body; the diameter of the electromagnetic valve is more than or equal to 50mm, the diameter of the valve seat is more than or equal to 80mm, and the upward/downward movement stroke of the armature is more than or equal to 6 mm. The invention is suitable for working conditions with large drift diameter and small flow resistance, and has small volume and light weight.
Description
Technical Field
The invention relates to an electromagnetic valve, in particular to a large-caliber pilot unloading type electromagnetic valve which is suitable for being used as a control valve of a low-pressure large-caliber gas pipeline. The large-caliber electromagnetic valve is an electromagnetic valve with the caliber being more than or equal to 50 mm.
Background
An environment-friendly life-saving system of a certain space station needs to be matched with a large-caliber electromagnetic valve for emergency pressure relief, and the design requirements of the caliber of not less than 50mm, the working pressure of 0-0.15 MPa, reliable sealing, the weight of not more than 2kg and the working life of not less than 3000 times are provided.
The existing commonly used solenoid valves comprise a pilot type solenoid valve and a direct-acting type solenoid valve, and the two valves have the following defects:
the pilot type electromagnetic valve structure needs minimum system medium pressure difference to drive the main valve core when being opened, and the valve can not work under no load or low working pressure.
The direct-acting electromagnetic valve can work under no-load or low working pressure, but if the design requirement of large caliber is met, the structural size and the mass of the direct-acting electromagnetic valve are large and far exceed the range which can be borne by the environment-friendly life-saving system of the space station.
Therefore, the existing electromagnetic valve cannot meet the design requirement of the environmental-control life-saving system of the space station.
Disclosure of Invention
Based on the background technology, the technical problem to be solved by the invention is to provide a large-caliber pilot unloading type electromagnetic valve which can work under no load or load and has small size and light weight.
The technical solution of the invention is as follows:
a large-caliber pilot unloading type electromagnetic valve comprises a valve body, a valve cover, a valve core assembly and an electromagnetic drive control assembly; a valve seat is arranged in the valve body; the valve cover is arranged at the upper end of the valve body; the valve cover is provided with a valve core assembly mounting hole;
it is characterized in that:
the valve core assembly comprises a main valve core and a guide valve core; the main valve core is arranged at the mounting hole of the valve core assembly, and the lower part of the main valve core is disc-shaped and is in sealing contact with the valve seat; the upper part of the main valve core is of a cylinder structure, and the bottom of the cylinder structure is provided with a pressure relief hole; the main valve core is also provided with a throttling hole and a communicating hole; the throttle hole is positioned on the medium inlet side of the valve body; one end of the communicating hole is communicated with the upper cavity of the main valve core, and the other end of the communicating hole is communicated with the pressure relief hole;
the axial section of the guide valve core is in a shape of T, a guide ring is sleeved outside the I part of the guide valve core, and the-part of the guide valve core is positioned below the guide ring; the diameter of the minus part of the guide valve core is larger than the inner diameter of the guide ring and smaller than the inner diameter of the cylinder structure;
the guide valve core and the guide ring are both positioned in the cylindrical structure of the main valve core, the guide ring is fixedly connected with the cylindrical structure, and the upper end of the I-shaped part of the guide valve core extends out of the cylindrical structure and is connected with the electromagnetic drive control assembly;
the electromagnetic valve also comprises a diaphragm; the inner edge part of the diaphragm is fixedly connected with the main valve core, and the outer edge part of the diaphragm is fixedly connected with the valve body;
the diameter of the electromagnetic valve is larger than or equal to 50mm, the diameter of the valve seat is larger than or equal to 80mm, and the upward/downward movement stroke of the armature is larger than or equal to 6 mm.
The valve core assembly moves up/down under the action of the electromagnetic drive control assembly so as to be separated from or jointed with the valve seat, and the communication state between the medium inlet and the medium outlet is switched.
The invention adopts the main valve core combined by the disc and the cylinder, and uses the diaphragm to connect the main valve core and the valve body, thereby not only increasing the drift diameter of the valve seat, but also reducing the weight and the volume of the valve to the minimum.
Based on the basic technical scheme, the invention also optimizes and/or defines the following steps:
in order to meet the requirement of large stroke of the main valve core, the diaphragm adopts a disc-shaped structure. The inner edge part of the diaphragm is fixedly pressed on the main valve core through a nut, and the outer edge part of the diaphragm is fixedly pressed on the valve body through a valve cover.
In order to reduce the rigidity of the diaphragm, prevent the diaphragm from fatigue tearing caused by multiple actions of the electromagnetic valve in a large-stroke working mode and ensure the action life of the electromagnetic valve, the diaphragm adopts a structure that two sides are rubber and cloth is clamped in the middle.
The electromagnetic drive control assembly mainly comprises a coil framework, a coil, a spring and an armature; the coil framework is fixedly arranged on the valve cover, and the lower part of the coil framework is sleeved outside the cylindrical structure of the main valve core; the coil is wound outside the coil framework; the armature is arranged in the coil framework and can axially slide along the coil framework; the upper part of the coil framework is provided with an electromagnet, and the magnetic pole surface of the electromagnet is opposite to the upper end surface of the armature and is provided with a certain distance; the spring is arranged between the magnetic pole surface of the coil framework and the upper end surface of the armature; the lower end of the armature is fixedly connected with the upper end of the guide valve core.
The lower end face of the armature is axially provided with a groove matched with the pilot valve core, and the groove is radially provided with a first pin hole along the armature; a second pin hole is formed in the corresponding position of the upper part of the guide valve core along the radial direction of the guide valve core; the armature and the guide valve core are fixedly connected at the first and second pin holes through connecting pins.
When the two opposite surfaces of the armature and the coil framework are provided with the 90-degree taper angles, the working air gap of the electromagnet is minimum, the quality of the electromagnet is minimum, and meanwhile, the stroke of the guide valve core and/or the main valve core can be guaranteed.
In order to prevent the occurrence of clamping stagnation and dead clamping and prolong the service life of the electromagnetic valve, a plastic antifriction ring is arranged outside the armature, and a plastic antifriction ring is also arranged outside the cylindrical structure of the main valve core.
In order to make the structure of the electromagnetic valve compact, the main valve core and the guide valve core are coaxially arranged.
Compared with the prior art, the invention has the advantages that:
(1) the invention combines the structural characteristics of the direct-acting electromagnetic valve and the pilot-operated electromagnetic valve, and is suitable for working conditions with large drift diameter and small flow resistance. In order to meet the design requirement of large caliber, the invention ensures the flow area of the valve by increasing the caliber of the valve seat and reducing the stroke of the armature (the stroke determines the opening degree of the main valve core), and meanwhile, the main valve core and the valve body are connected and sealed by adopting the rubber diaphragm, while the structural size of other components is increased very little or even does not need to be increased, so the invention has compact structure, small volume and light weight; the electromagnetic driving control assembly controls the connection/disconnection of the valve core assembly and the valve seat, so that the valve core assembly can work under no load or low working pressure.
(2) The diaphragm is disc-shaped, adopts a rubber-cloth-rubber structure, has the characteristics of small rigidity and large stroke, can ensure the stroke of the valve core assembly, can prevent fatigue tearing caused by multiple actions in a large-stroke working mode, and effectively ensures the action life of the electromagnetic valve.
(3) The opposite surfaces of the electromagnet and the armature are respectively provided with a 90-degree cone angle structure, so that the working air gap of the electromagnet is reduced on the premise of ensuring the stroke of the armature, and the required electromagnetic attraction can be obtained by using smaller electromagnet mass and volume.
(4) The main valve core is provided with the throttling hole, the pressure relief hole and the communicating hole, the size of the throttling hole and the size of the pressure relief hole are reasonably matched in structural design, the flow area of the pressure relief hole is designed to be more than or equal to 3 times of the flow area of the throttling hole, and therefore the response time of opening and closing of the valve is controlled within 100ms to meet design requirements.
(5) The plastic antifriction rings are arranged outside the armature and outside the cylindrical structure of the main valve core, so that the friction force generated when the armature and the main valve core act can be reduced, the phenomena of clamping stagnation and dead locking of the armature and the valve body, the main valve core and the coil framework are prevented, and the action life of the electromagnetic valve is prolonged.
(6) The invention has high sealing reliability. The valve core-valve seat sealing pair adopts a nonmetal-metal composite sealing structure in structural design, the nonmetal sealing material adopts a rubber material with better rebound resilience, the sealing end of the guide valve core and the sealing end of the main valve core both adopt a rubber vulcanization technology to ensure that the rubber block is reliably connected with the valve core substrate, the sealing specific pressure acting on the rubber material is strictly controlled, and the sealing reliability of the valve core after multiple actions is ensured.
Drawings
FIG. 1 is a schematic diagram of a large-caliber pilot unloading type electromagnetic valve structure;
FIG. 2 is a view of the main valve core and pilot valve core connection structure of the present invention;
fig. 3 is a view of the armature of the present invention.
Wherein the reference numerals are:
1-coil framework, 2-coil, 3-spring, 4-armature, 41-plastic antifriction ring, 5-connecting pin, 6-guide valve core, 61-connecting hole, 7-main valve core, 71-orifice, 72-pressure relief hole, 73-communicating hole, 8-guide ring, 9-diaphragm, 10-valve body, 11-adjusting gasket, 12-gasket, 13-O-shaped rubber seal ring, 14-big nut, 15-small nut, 16-O-shaped rubber seal ring, 17-valve cover, 18-valve seat, 19-cone angle and 20-main valve core upper cavity.
Detailed Description
The invention is further described with reference to the following figures and detailed description.
As shown in fig. 1 and fig. 2, the large-caliber pilot unloading type electromagnetic valve provided by the invention comprises a valve body 10, a valve cover, a valve core assembly and an electromagnetic drive control assembly.
The left end of the valve body 10 is a medium inlet, the right end is a medium outlet, and a medium channel is arranged between the medium inlet and the medium outlet. A valve seat 18 is arranged in the valve body 10; the valve cover 17 is installed at the upper end of the valve body 10 (the joint is sealed by the O-shaped rubber sealing ring 13), a valve core assembly installation hole is formed in the valve cover 17, the valve core assembly is located at the valve core assembly installation hole, and when the valve is closed, the bottom of the valve core assembly is in sealing contact with the valve seat.
The valve core assembly is a combined valve core and consists of a main valve core 7 arranged at the mounting hole of the valve core assembly and a guide valve core 6 embedded in the main valve core. The lower part of the main valve core 7 is disc-shaped and is in sealing contact with the upper end face of the valve seat 18, the main valve core 7 is of a cylindrical structure, and the bottom of the cylindrical structure is provided with a pressure relief hole 72; the main valve core 7 is provided with a throttling hole 71 close to the medium inlet, and a communicating hole 73 for communicating the upper cavity of the main valve core with a pressure relief hole is arranged on the cylinder structure. The flow area of the throttling hole is smaller than that of the communicating hole and smaller than that of the pressure relief hole.
The guide valve core 6 is integrally rod-shaped, and the diameter of the lower end of the guide valve core is increased to be used as a sealing head; a guide ring 8 is arranged between the rod part of the guide valve core 6 and the cylindrical structure of the main valve core 7, the guide ring 8 is fixedly connected with the main valve core 7 in a threaded connection mode, and a gap exists between the guide ring 8 and the guide valve core 6. The upper end rod part of the guide valve core 6 extends out of the cylinder structure and is fixedly connected with an armature iron 4 of the electromagnetic drive control assembly through a connecting pin 5, the lower end head part is in sealing contact with the pressure relief hole 72, and the bottom of the cylinder structure is used as a valve seat of the guide valve core.
In order to reduce the size of the valve as much as possible when meeting the design requirement of large caliber, the caliber of the valve seat is more than or equal to 80mm, and the diaphragm 9 is adopted to connect the main valve core and the valve body, the specific connection mode is that the inner edge part of the diaphragm 9 is fixed on the upper end surface of the main valve core through a large nut 14 and a gasket 12, and the outer edge part of the diaphragm 9 is fixed between the valve body and the valve cover through an adjusting gasket 11. In order to ensure the stroke of the valve core assembly, prevent fatigue tearing caused by multiple actions under large stroke and ensure the action life of the electromagnetic valve, the diaphragm 9 adopts a disc-shaped diaphragm with two sides of which are in a rubber middle cloth clamping structure.
The electromagnetic drive control assembly mainly comprises a coil 2, a coil framework 1 and an armature 4. The coil framework 1 is fixedly arranged on the valve cover 17 (the joint of the coil framework 1 and the valve cover is sealed by an O-shaped rubber sealing ring 16), the lower part of the coil framework 1 is a cylinder and is sleeved outside the cylinder structure of the main valve core and is fixed by a small nut 15, the middle part of the coil framework is reserved with an installation space of the armature 4, and the upper part of the coil framework is provided with an electromagnet; the coil 2 is wound outside the coil framework 1; the armature 4 is arranged in the coil framework 1 and can axially move along the coil framework (in order to prolong the service life of the valve, a plastic antifriction ring 41 is arranged outside the armature 4), and the upper end surface of the armature 4 is over against the magnetic pole surface of the electromagnet and is reserved with a certain travel distance; a spring 3 is arranged between the magnetic pole surface of the electromagnet and the upper end surface of the armature; the lower end of the armature is fixedly connected with the upper end of the guide valve core through a connecting pin.
In order to further reduce the size of the electromagnetic valve, the opposite surfaces of the electromagnet and the armature are provided with structures with 90-degree cone angles 19, so that the mass and the volume of the electromagnet are reduced to the maximum extent on the premise of the same size of electromagnetic attraction force.
The working principle of the invention is as follows:
the working mode of the invention is power-on opening and power-off closing. When the valve does not work, a medium enters the main valve element upper cavity 20 through the throttling hole 71 on the main valve element 7, and provides sealing force for the main valve element 7 together with the spring 3, so that reliable sealing of the main valve element is ensured; the spring 3 provides sealing force for the guide valve core 6, and reliable sealing of the guide valve core is guaranteed.
Under the no-load condition, after the coil 2 is electrified, the electromagnetic suction overcomes the spring force to lift the guide valve core 6 and the main valve core 7 upwards in sequence, and the valve is opened.
When the medium inlet and the medium outlet have pressure difference, the coil 2 is electrified, the guide valve core 6 is sucked for a short distance, the pressure relief hole 72 on the main valve core 7 is opened to communicate the upper main valve cavity with the medium outlet of the valve, the pressure in the upper main valve core cavity is rapidly reduced because the flow area of the pressure relief hole 72 is larger than that of the throttling hole 71, and when the medium acting force on the main valve core is smaller than the electromagnet acting force, the main valve core 7 is opened under the action of the electromagnetic attraction force and the medium force.
When the valve needs to be closed, the coil 2 is powered off, the guide valve core 6 is closed firstly under the acting force of the spring, the pressure in the cavity of the main valve core rises rapidly, the guide valve core 6 and the main valve core 7 move downwards under the combined action of the spring force and the medium force, and the valve is closed.
Claims (6)
1. A large-caliber pilot unloading type electromagnetic valve comprises a valve body, a valve cover, a valve core assembly and an electromagnetic drive control assembly; a valve seat is arranged in the valve body; the valve cover is arranged at the upper end of the valve body; the valve cover is provided with a valve core assembly mounting hole;
the method is characterized in that:
the valve core assembly comprises a main valve core and a guide valve core; the main valve core is arranged at the mounting hole of the valve core assembly, and the lower part of the main valve core is disc-shaped and is in sealing contact with the valve seat; the upper part of the main valve core is of a cylinder structure, and the bottom of the cylinder structure is provided with a pressure relief hole; the main valve core is also provided with a throttling hole and a communicating hole; the throttle hole is positioned on the medium inlet side of the valve body; the communicating hole is positioned on the cylindrical structure, one end of the communicating hole is communicated with the upper cavity of the main valve core, and the other end of the communicating hole is communicated with the pressure relief hole; after the electromagnetic valve is opened, the communicating hole on the main valve core is blocked by the coil framework;
the axial section of the guide valve core is in a shape of T, a guide ring is sleeved outside the I part of the guide valve core, and the-part of the guide valve core is positioned below the guide ring; the diameter of the minus part of the guide valve core is larger than the inner diameter of the guide ring and smaller than the inner diameter of the cylinder structure;
the guide valve core and the guide ring are both positioned in the cylindrical structure of the main valve core, the guide ring is fixedly connected with the cylindrical structure, and the upper end of the I-shaped part of the guide valve core extends out of the cylindrical structure and is connected with the electromagnetic drive control assembly;
the electromagnetic valve also comprises a diaphragm; the inner edge part of the diaphragm is fixedly connected with the main valve core, and the outer edge part of the diaphragm is fixedly connected with the valve body;
the diameter of the electromagnetic valve is more than or equal to 50mm, the diameter of the valve seat is more than or equal to 80mm, and the upward/downward movement stroke of the armature is more than or equal to 6 mm;
the electromagnetic drive control assembly comprises a coil framework, the coil framework is fixedly arranged on the valve cover, and the lower part of the coil framework is sleeved outside the cylindrical structure of the main valve core;
the diaphragm is disc-shaped, the inner edge part of the diaphragm is fixedly pressed on the main valve core through a nut, and the outer edge part of the diaphragm is fixedly pressed on the valve body through a valve cover;
the diaphragm adopts a structure that two sides are rubber and cloth is clamped in the middle.
2. The large-caliber pilot-unloaded solenoid valve according to claim 1, wherein: the electromagnetic drive control assembly further comprises a coil, a spring and an armature; the coil is wound outside the coil framework; the armature is arranged in the coil framework and can axially slide along the coil framework; the upper part of the coil framework is provided with an electromagnet, and the magnetic pole surface of the electromagnet is opposite to the upper end surface of the armature and is provided with a certain distance; the spring is arranged between the magnetic pole surface of the coil framework and the upper end surface of the armature; the lower end of the armature is fixedly connected with the upper end of the guide valve core.
3. The large-caliber pilot-unloaded solenoid valve according to claim 2, wherein: the lower end face of the armature is axially provided with a groove matched with the pilot valve core, and the groove is radially provided with a first pin hole along the armature; a second pin hole is formed in the corresponding position of the upper part of the guide valve core along the radial direction of the guide valve core; the armature and the guide valve core are fixedly connected at the first and second pin holes through connecting pins.
4. The large-caliber pilot-unloaded solenoid valve according to claim 2 or 3, wherein: and two opposite surfaces of the armature and the coil framework are provided with 90-degree taper angles.
5. The large-caliber pilot-unloaded solenoid valve according to claim 2 or 3, wherein: a plastic antifriction ring is arranged outside the armature; a plastic antifriction ring is arranged outside the cylinder structure of the main valve core.
6. The large-caliber pilot-unloaded solenoid valve according to claim 1, wherein: the main valve core and the guide valve core are coaxially arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611251613.8A CN106641398B (en) | 2016-12-30 | 2016-12-30 | Large-caliber pilot unloading type electromagnetic valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611251613.8A CN106641398B (en) | 2016-12-30 | 2016-12-30 | Large-caliber pilot unloading type electromagnetic valve |
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| CN106641398A CN106641398A (en) | 2017-05-10 |
| CN106641398B true CN106641398B (en) | 2020-10-16 |
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| CN201611251613.8A Active CN106641398B (en) | 2016-12-30 | 2016-12-30 | Large-caliber pilot unloading type electromagnetic valve |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107339490A (en) * | 2017-08-17 | 2017-11-10 | 无锡威孚高科技集团股份有限公司 | One kind stops solenoid |
| CN109139591B (en) * | 2018-09-25 | 2020-03-10 | 中国农业大学 | Mountain and hill self-adaptation pilot-operated type electro-hydraulic proportional threaded cartridge valve |
| CN112483654A (en) * | 2020-10-27 | 2021-03-12 | 北京宇航系统工程研究所 | Quick response solenoid valve |
| CN112664702A (en) * | 2020-12-14 | 2021-04-16 | 西安航天动力研究所 | Miniaturized low-temperature electromagnetic control valve with long service life and adjustable flow |
| CN113623421A (en) * | 2021-08-21 | 2021-11-09 | 浙江鸿友压缩机制造有限公司 | Pilot-operated electronic unloading valve and compressor system equipped with same |
| CN113757439B (en) * | 2021-09-17 | 2023-06-27 | 西安航天动力研究所 | Plug-in mounting type high-pressure unloading electromagnetic valve |
| CN115264078A (en) * | 2022-05-31 | 2022-11-01 | 燕山大学 | External self-icebreaking electromagnetic valve with exciting body |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0226381A (en) * | 1988-07-15 | 1990-01-29 | Toto Ltd | Solenoid valve |
| CN201344282Y (en) * | 2009-03-15 | 2009-11-11 | 蒋可贞 | Dished diaphragm type universal solenoid valve with large flow capacity |
| CN202418711U (en) * | 2012-01-04 | 2012-09-05 | 浙江永久科技实业有限公司 | Diaphragm type electromagnetic valve |
| CN205446871U (en) * | 2015-12-10 | 2016-08-10 | 西安航天动力研究所 | Wide working range's substep direct action type electromagnetism actuates valve |
| CN206377328U (en) * | 2016-12-30 | 2017-08-04 | 西安航天动力研究所 | A kind of heavy caliber guide discharging type magnetic valve |
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