CN110566712A - Self-holding type electromagnetic valve - Google Patents
Self-holding type electromagnetic valve Download PDFInfo
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- CN110566712A CN110566712A CN201910937792.8A CN201910937792A CN110566712A CN 110566712 A CN110566712 A CN 110566712A CN 201910937792 A CN201910937792 A CN 201910937792A CN 110566712 A CN110566712 A CN 110566712A
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- self
- valve
- iron core
- permanent magnet
- locking
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 86
- 230000003068 static effect Effects 0.000 claims abstract description 23
- 238000007789 sealing Methods 0.000 claims description 16
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 4
- 229910052709 silver Inorganic materials 0.000 claims description 4
- 239000004332 silver Substances 0.000 claims description 4
- NKRHXEKCTWWDLS-UHFFFAOYSA-N [W].[Cr].[Co] Chemical compound [W].[Cr].[Co] NKRHXEKCTWWDLS-UHFFFAOYSA-N 0.000 claims description 3
- 239000000446 fuel Substances 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 10
- 230000009471 action Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 229910001220 stainless steel Inorganic materials 0.000 description 5
- 239000010935 stainless steel Substances 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 229910052734 helium Inorganic materials 0.000 description 4
- 239000001307 helium Substances 0.000 description 4
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 230000033001 locomotion Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 230000002285 radioactive effect Effects 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 238000004881 precipitation hardening Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
Classifications
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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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
-
- 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
-
- 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
- F16K31/0675—Electromagnet aspects, e.g. electric supply therefor
-
- 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
- F16K31/08—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid using a permanent magnet
- F16K31/084—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid using a permanent magnet the magnet being used only as a holding element to maintain the valve in a specific position, e.g. check valves
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
The invention provides a self-holding type electromagnetic valve which comprises a main valve module, an auxiliary valve module, a self-locking device and a permanent magnet rod, wherein the main valve module is provided with a main valve opening and a main valve opening; the main valve module comprises a main valve coil, a driving iron core, a main static iron core and a valve rod; the main static iron core and the main valve coil are arranged up and down, and the main static iron core is movably sleeved in the main valve coil and can move up and down along the axis of the main valve coil; the upper end of the valve rod is connected with the active iron core; the auxiliary valve module comprises a sleeve, a piston ring and a small valve; the piston ring is arranged in the inner cavity of the piston, the piston is arranged in the inner cavity of the sleeve, and the lower end of the valve rod is connected with the piston ring; the small valve is arranged on the side wall of the piston and is communicated with the inner cavity and the outer cavity of the piston; the lower end of the permanent magnet rod is connected with the driving iron core, and the self-locking device is connected with the ring surface of the permanent magnet rod and used for limiting the permanent magnet rod to move up and down. The self-holding electromagnetic valve is used in the pipeline of a fuel handling system, the auxiliary valve module keeps the valve closed under the normal working condition, and the self-locking device locks the permanent magnet rod under the power-off or failure state to enable the valve to be in the open state.
Description
Technical Field
The invention relates to the technical field of electromagnetic valves, in particular to a self-holding electromagnetic valve.
Background
The electromagnetic valve plays an important role in a helium pneumatic conveying system in the field of nuclear power. In the environment, the medium circulated by the electromagnetic valve is mainly high-temperature helium gas containing radioactive dust, the valve is required to be kept closed under normal working conditions, and the valve can be kept in a long-term opening state when being opened in the conveying process.
when the existing electromagnetic control valve changes the conducting state, the valve is changed from opening to closing, and from closing control to opening, and the valve is kept open is not common.
disclosure of Invention
The present invention provides a self-holding solenoid valve which can be quickly changed to a conducting state as required during a valve closing state and reliably maintain the valve opening state for a long period of time.
The embodiment of the invention is realized by the following steps:
A self-holding type electromagnetic valve comprises a main valve module, an auxiliary valve module, a self-locking device and a permanent magnet rod; the main valve module comprises a main valve coil, a driving iron core, a main static iron core and a valve rod; the main static iron core and the main valve coil are arranged up and down, and the driving iron core is movably sleeved in the main valve coil and can move up and down along the axis of the main valve coil; the upper end of the valve rod is connected with the active iron core; the auxiliary valve module comprises a sleeve, a piston ring and a small valve; the piston ring is arranged in the inner cavity of the piston, the piston is arranged in the inner cavity of the sleeve, and the lower end of the valve rod is connected with the piston ring; the small valve is arranged on the side wall of the piston and is communicated with the inner cavity and the outer cavity of the piston; the lower end of the permanent magnet rod is connected with the driving iron core, and the self-locking device is connected with the annular surface of the permanent magnet rod and used for limiting the permanent magnet rod to move up and down.
The working principle and the flow of the self-holding type electromagnetic valve are as follows:
(1) Controlling to close the valve and keeping a closed state:
When the valve is closed, the main valve coil is first powered on, and then the self-locking device is powered on, so that electromagnetic force is generated when the self-locking device is powered on, and the permanent magnet rod is separated from the self-locking device. At the moment, the coil of the main valve is powered off, the driving iron core is separated from the main static iron core, the self-locking device is powered off after 1s, the small valve is closed under the action of spring force and the gravity of each component of the valve rod, the piston moves downwards under the action of medium pressure difference in the sleeve to close the self-holding electromagnetic valve, the working medium is blocked from passing through, and the self-holding electromagnetic valve is in a closed state.
(2) Controlling the valve to open and keep the valve open:
And the main valve coil is electrified, the main valve coil generates electromagnetic force to suck the driving iron core, so that the driving iron core and the main static iron core are closed, the valve rod is pulled to drive the small valve to open the pilot valve, and at the moment, the high-pressure medium in the upper piston cavity is quickly discharged. Under the action of the pressure difference between the upper part and the lower part of the piston, the piston is floated quickly to drive the permanent magnetic rod to ascend, and the self-locking device is controlled to lock the permanent magnetic rod. Then, the main valve coil is de-energized, and the self-holding solenoid valve is kept in an open state.
In a preferred embodiment of the invention, the self-locking device comprises a self-locking coil, a self-locking movable iron core, a self-locking static iron core and an iron core spring; the self-locking coil is sleeved on the periphery of the self-locking movable iron core, and the self-locking static iron core, the iron core spring and the self-locking movable iron core are coaxially arranged; the iron core spring is used for pushing the self-locking movable iron core to move towards the permanent magnet rod, and the self-locking static iron core is used for attracting the self-locking movable iron core to move away from the permanent magnet rod; the ring surface of the permanent magnet rod is provided with a groove corresponding to the self-locking movable iron core, and the moving direction of the self-locking movable iron core is vertical to the length direction of the permanent magnet rod. The technical effects are as follows: after the valve is opened and the permanent magnet rod is pushed to move upwards, the self-locking iron core moves towards the permanent magnet rod and is clamped into the groove under the thrust action of the iron core spring, the effect of limiting the permanent magnet rod to move downwards is achieved, and the valve is guaranteed to be in an opening state. When the valve is required to be closed, the self-locking coil is electrified, so that the self-locking static iron core and the self-locking movable iron core set are closed, the permanent magnet rod is separated from the self-locking device and falls automatically, and the valve is closed.
In a preferred embodiment of the present invention, the number of the self-locking devices is even; the self-locking devices are distributed along the circumferential direction of the permanent magnet rods in a pairwise opposite mode. The technical effects are as follows: the even number of the self-locking devices are opposite to each other, so that the pushing force on the permanent magnet rod is equal, the stability and the precision of the opening state of the valve are improved, and the permanent magnet rod is prevented from being deviated or bent.
In the preferred embodiment of the invention, the device also comprises a signal module and a signal shielding tube; the signal module is arranged at the upper end of the permanent magnet rod, and the signal shielding pipe is sleeved on the periphery of the permanent magnet rod and is positioned between the permanent magnet rod and the self-locking device. The technical effects are as follows: the signal module is used for electromagnetically controlling the valve, and the signal shielding tube is used for eliminating the negative influence of the coil and the iron core on signal transmission.
In the preferred embodiment of the invention, the device further comprises an outer sealing assembly; the outer sealing assembly is arranged on the outer side of the signal shielding pipe attached to the self-locking device. The technical effects are as follows: the external sealing assembly guarantees the requirements of the valve and the vacuum pumping system on external leakage indexes.
in a preferred embodiment of the present invention, the outer seal assembly includes a silver gasket. The technical effects are as follows: the silver gasket has reliable sealing performance and can resist severe environmental conditions of nuclear energy radiation and high temperature and high pressure.
In a preferred embodiment of the invention, the outer wall of the sleeve is provided with a rigid seal; and a rigid sealing piece is arranged at the joint position of the piston and the valve body. The technical effects are as follows: because sleeve, piston and laminating adapting unit relative movement are frequent, and the rigidity is sealed wear resistance and is stronger, can satisfy strict operating mode requirement.
In a preferred embodiment of the invention, the rigid seal is formed by cobalt chromium tungsten overlay welding. The technical effects are as follows: the hard alloy formed by overlaying cobalt, chromium and tungsten has the characteristics of high hardness, excellent wear resistance, strong corrosion resistance and the like, and can maintain the wear-resistant sealing performance even under the high-temperature condition.
In a preferred embodiment of the invention, the valve rod is detachably connected with the active iron core, and the valve rod is detachably connected with the piston ring. The technical effects are as follows: can dismantle the valve rod and the initiative iron core of connection, can dismantle the valve rod and the piston ring of connection, easy dismounting does benefit to the maintenance.
In a preferred embodiment of the present invention, an upper end hook of the valve stem is connected to a lower end of the active iron core, and a lower end hook of the valve stem is connected to the piston ring. The technical effects are as follows: the motion direction of the valve rod, the driving iron core and the piston ring is only in the axis direction of the valve rod, so that the straight line movement of the valve rod is not influenced by the hook form, and the valve rod is not easy to fall off. But greatly facilitates the integral installation, disassembly and maintenance of the valve.
The embodiment of the invention has the beneficial effects that:
the self-holding electromagnetic valve is used in the pipeline of a fuel handling system, the auxiliary valve module keeps the valve closed under the normal working condition, and the self-locking device locks the permanent magnet rod under the power-off or failure state to enable the valve to be in the open state.
Drawings
in order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic overall structural diagram of a self-holding solenoid valve according to an embodiment of the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1 at I;
Fig. 3 is a schematic structural diagram of the self-locking device in the self-holding electromagnetic valve according to the embodiment of the present invention when the self-locking device is unlocked;
fig. 4 is a schematic structural diagram of a self-locking device in a self-holding solenoid valve according to an embodiment of the present invention when locking.
in the figure: 1-a main valve coil; 2-active iron core; 3-a main static iron core; 4-a valve stem; 5-a sleeve; 6-a piston; 7-a piston ring; 8-small valve; 9-permanent magnet bar; 10-a self-locking coil; 11-self-locking iron core; 12-self-locking static iron core; 13-core spring; 14-a signal module; 15-signal shielding tube; 16-outer seal assembly.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein can be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
in the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
some embodiments of the invention are described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.
fig. 1 is a schematic overall structural diagram of a self-holding solenoid valve according to an embodiment of the present invention; FIG. 2 is an enlarged view of a portion of FIG. 1 at I; fig. 3 is a schematic structural diagram of the self-locking device in the self-holding electromagnetic valve according to the embodiment of the present invention when the self-locking device is unlocked; fig. 4 is a schematic structural diagram of a self-locking device in a self-holding solenoid valve according to an embodiment of the present invention when locking.
The first embodiment:
Referring to fig. 1 to 4, the present embodiment provides a self-holding solenoid valve, which includes a main valve module, an auxiliary valve module, a self-locking device and a permanent magnet rod 9; the main valve module comprises a main valve coil 1, a driving iron core 2, a main static iron core 3 and a valve rod 4; the main static iron core 3 and the main valve coil 1 are arranged up and down, and the driving iron core 2 is movably sleeved in the main valve coil 1 and can move up and down along the axis of the main valve coil 1; the upper end of the valve rod 4 is connected with the active iron core 2; the auxiliary valve module comprises a sleeve 5, a piston 6, a piston ring 7 and a small valve 8; the piston ring 7 is arranged in the inner cavity of the piston 6, the piston 6 is arranged in the inner cavity of the sleeve 5, and the lower end of the valve rod 4 is connected with the piston ring 7; the small valve 8 is arranged on the side wall of the piston 6 and is communicated with the inner cavity and the outer cavity of the piston 6; the lower end of the permanent magnet rod 9 is connected with the driving iron core 2, and the self-locking device is connected with the ring surface of the permanent magnet rod 9 and used for limiting the permanent magnet rod 9 to move up and down.
Referring to fig. 3 and 4, the self-locking device includes a self-locking coil 10, a self-locking movable iron core 11, a self-locking stationary iron core 12 and an iron core spring 13; the self-locking coil 10 is sleeved on the periphery of the self-locking movable iron core 11, and the self-locking static iron core 12, the iron core spring 13 and the self-locking movable iron core 11 are coaxially arranged; the iron core spring 13 is used for pushing the self-locking movable iron core 11 to move towards the permanent magnet rod 9, and the self-locking static iron core 12 is used for attracting the self-locking movable iron core 11 to move away from the permanent magnet rod 9; the ring surface of the permanent magnet rod 9 is provided with a groove corresponding to the self-locking iron core 11, and the moving direction of the self-locking iron core 11 is vertical to the length direction of the permanent magnet rod 9.
Referring to fig. 3 and 4, the number of the self-locking devices is even; the even number of self-locking devices are distributed along the circumferential direction of the permanent magnet rod 9 in a pairwise opposite manner.
The self-holding type electromagnetic valve plays an important role in a helium gas pneumatic conveying system in the nuclear power field, and is mainly applied to pipelines of a fuel loading and unloading system. The medium circulated in the use environment is mainly high-temperature helium gas containing radioactive dust, which has high requirements on the opening and closing control efficiency and stability of the electromagnetic valve. The self-holding solenoid valve is required to be in a closed state under normal working conditions, and when the valve needs to be opened by a system, the self-holding solenoid valve can be kept in an open state for a long time. The working principle and the flow are as follows:
(1) when the valve closing operation is required, the main valve coil 1 is electrified firstly, then the self-locking device is electrified, and electromagnetic force is generated when the self-locking device is electrified, so that the permanent magnet rod 9 is separated from the self-locking device. At the moment, the main valve coil 1 is powered off, the driving iron core 2 is separated from the main static iron core 3, the self-locking device is powered off after 1s, the small valve 8 is closed under the action of spring force and the gravity of each component of the valve rod 4, the piston 6 moves downwards to close the self-holding electromagnetic valve under the action of medium pressure difference in the sleeve 5, the working medium is blocked from passing through, and the self-holding electromagnetic valve is in a closed state.
(2) The main valve coil 1 is electrified, the main valve coil 1 generates electromagnetic force to suck the driving iron core 2, the driving iron core 2 and the main static iron core 3 are closed, the valve rod 4 is pulled to drive the small valve 8 to open the pilot valve, and at the moment, the high-pressure medium in the upper cavity of the piston 6 is quickly discharged. Under the action of the pressure difference between the upper part and the lower part of the piston 6, the piston 6 is quickly floated to drive the permanent magnet rod 9 to ascend, and at the moment, the self-locking device is controlled to lock the permanent magnet rod 9. Then, the main valve coil 1 is deenergized, and the self-holding type solenoid valve is kept in an open state.
Second embodiment:
referring to fig. 1, the present embodiment provides a self-holding solenoid valve, which is substantially the same as the self-holding solenoid valve of the first embodiment, and the difference between the self-holding solenoid valve and the self-holding solenoid valve is that the self-holding solenoid valve of the present embodiment further includes a signal module 14 and a signal shielding tube 15; the signal module 14 is arranged at the upper end of the permanent magnet rod 9, and the signal shielding pipe 15 is sleeved on the periphery of the permanent magnet rod 9 and is positioned between the permanent magnet rod 9 and the self-locking device.
Referring to fig. 1, 3 and 4, the liquid crystal display further includes an outer sealing assembly 16; the outer sealing assembly 16 is arranged on the outer side of the signal shielding pipe 15 attached to the self-locking device.
Referring to fig. 1, 3 and 4, the outer sealing assembly 16 includes a silver gasket.
The third embodiment:
Referring to fig. 2, the present embodiment provides a self-holding solenoid valve, which is substantially the same as the self-holding solenoid valves of the first and second embodiments, and the difference between the two embodiments is that a rigid sealing member is disposed on an outer wall of a sleeve 5 of the self-holding solenoid valve of the present embodiment; and a rigid sealing piece is arranged at the joint position of the piston 6 and the valve body.
The rigid seal is formed by cobalt chromium tungsten weld overlay.
on the basis of any of the above embodiments, as shown in fig. 1, the valve rod 4 is detachably connected with the active iron core 2, and the valve rod 4 is detachably connected with the piston ring 7.
On the basis of any of the above embodiments, as shown in fig. 1, the upper end of the valve rod 4 is hooked to the lower end of the active iron core 2, and the lower end of the valve rod 4 is hooked to the piston ring 7. Namely, the upper end and the lower end of the valve rod 4 are respectively provided with a large-size end part, the lower end of the active iron core 2 is provided with a grooved cavity, and the piston ring 7 is also provided with a strip-shaped groove.
Other technical indexes and technical processes of the self-holding type electromagnetic valve are as follows:
1. The control mode of the electromagnetic valve is electromagnetic control.
2. The pipeline connection mode adopts a welding mode.
3. All metal parts in the electromagnetic valve are made of stainless steel, so that the overall corrosion resistance of the valve is obviously improved, and the service life of the electromagnetic valve is prolonged.
4. The valve body of the electromagnetic valve is formed by forging and machining F316 austenitic stainless steel, and has the advantages of strong corrosion resistance, attractive and practical appearance and easiness in cleaning. The minimum wall thickness of the valve body design meets the requirements of ASME B16.34, sufficient corrosion allowance is reserved, and the requirement of the 40-year service life of the valve body is guaranteed.
5. All the metal parts in the electromagnetic valve are made of stainless steel, and the valve rod 4 is made of 07Cr17Ni7Al precipitation hardening type stainless steel. The pressure-bearing stud and the nut are made of high-strength 660-grade stainless steel. All the other non-bearing bolts and gaskets are made of 70-grade stainless steel, and all the internal non-metal parts are made of temperature-resistant and radiation-resistant rubber materials.
6. The design roughness of the sealing surface of the sleeve 5 and the piston 6 of the electromagnetic valve reaches 0.2 mu m, and the sealing property of the valve is improved. The designed roughness of the surfaces of all the other sliding parts reaches more than 0.8 mu m, and the roughness of the outer surfaces of all the other parts reaches more than 1.6 mu m; the tolerance of the size without injection reaches above GB/T1804-m level; all the un-injection position tolerances reach the GB/T1184-H level or above. A good fit clearance will contribute to an increased service life of the sliding parts.
7. The design cycle life of the electromagnetic valve is longer than 1000 times, and the electromagnetic valve can meet the cycle life index of the technical requirement by adopting high-quality metal materials, rigid dynamic sealing pairs, hard alloy surfacing welding of easily damaged parts, high-strength and aging-resistant sealing materials and mature and advanced special processes.
The main technical parameters of the self-holding solenoid valve in the above embodiment are listed as follows:
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A self-holding type electromagnetic valve is characterized by comprising a main valve module, an auxiliary valve module, a self-locking device and a permanent magnet rod (9);
the main valve module comprises a main valve coil (1), a driving iron core (2), a main static iron core (3) and a valve rod (4); the main static iron core (3) and the main valve coil (1) are arranged up and down, and the driving iron core (2) is movably sleeved in the main valve coil (1) and can move up and down along the axis of the main valve coil (1); the upper end of the valve rod (4) is connected with the active iron core (2);
The auxiliary valve module comprises a sleeve (5), a piston (6) ring and a small valve (8); the piston (6) is annularly arranged in an inner cavity of the piston (6), the piston (6) is arranged in an inner cavity of the sleeve (5), and the lower end of the valve rod (4) is connected with the piston (6) ring; the small valve (8) is arranged on the side wall of the piston (6) and is communicated with the inner cavity and the outer cavity of the piston (6);
The lower end of the permanent magnet rod (9) is connected with the active iron core (2), and the self-locking device is connected with the ring surface of the permanent magnet rod (9) and used for limiting the permanent magnet rod (9) to move up and down.
2. The self-holding solenoid valve according to claim 1, characterized in that said self-locking means comprise a self-locking coil (10), a self-locking plunger (11), a self-locking stationary plunger (12) and a plunger spring (13); the self-locking coil (10) is sleeved on the periphery of the self-locking movable iron core (11), and the self-locking static iron core (12), the iron core spring (13) and the self-locking movable iron core (11) are coaxially arranged; the iron core spring (13) is used for pushing the self-locking moving iron core (11) to move towards the permanent magnet rod (9), and the self-locking static iron core (12) is used for attracting the self-locking moving iron core (11) to move away from the permanent magnet rod (9); the ring surface of the permanent magnet rod (9) is provided with a groove corresponding to the self-locking moving iron core (11), and the moving direction of the self-locking moving iron core (11) is vertical to the length direction of the permanent magnet rod (9).
3. The self-sustaining electromagnetic valve according to claim 2, characterized in that the number of said self-locking means is an even number; the self-locking devices are distributed along the circumferential direction of the permanent magnet rods (9) in a pairwise opposite manner.
4. The self-holding solenoid valve of claim 2, further comprising a signal module (14) and a signal shielding tube (15); the signal module (14) is arranged at the upper end of the permanent magnet rod (9), and the signal shielding pipe (15) is sleeved on the periphery of the permanent magnet rod (9) and is positioned between the permanent magnet rod (9) and the self-locking device.
5. The self-holding solenoid valve of claim 4, further comprising an outer seal assembly (16); the outer sealing assembly (16) is arranged on the outer side of the signal shielding pipe (15) attached to the self-locking device.
6. The self-holding solenoid valve of claim 5, wherein the outer seal assembly (16) comprises a silver gasket.
7. Self-holding solenoid valve according to claim 1, characterized in that the external wall of the sleeve (5) is provided with a rigid seal; and a rigid sealing piece is arranged at the joint position of the piston (6) and the valve body.
8. The self-sustaining solenoid valve of claim 7, wherein said rigid seal is formed by cobalt chromium tungsten weld overlay.
9. Self-holding solenoid valve according to claim 1, characterized in that said stem (4) is removably connected to said active core (2), said stem (4) being removably connected to said ring of pistons (6).
10. Self-holding solenoid valve according to claim 1, characterized in that the upper end of the stem (4) is hooked to the lower end of the active core (2) and the lower end of the stem (4) is hooked to the piston (6) ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910937792.8A CN110566712A (en) | 2019-09-29 | 2019-09-29 | Self-holding type electromagnetic valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910937792.8A CN110566712A (en) | 2019-09-29 | 2019-09-29 | Self-holding type electromagnetic valve |
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| Publication Number | Publication Date |
|---|---|
| CN110566712A true CN110566712A (en) | 2019-12-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910937792.8A Pending CN110566712A (en) | 2019-09-29 | 2019-09-29 | Self-holding type electromagnetic valve |
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| JPH1130354A (en) * | 1997-07-14 | 1999-02-02 | Fuji Koki Corp | Electric operated valve |
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| CN102330834A (en) * | 2011-09-07 | 2012-01-25 | 浙江中宝自控元件有限公司 | Electromagnetic valve |
| WO2013097445A1 (en) * | 2011-12-31 | 2013-07-04 | Danfoss (Tianjin) Ltd. | Solenoid valve |
| CN203670802U (en) * | 2013-12-26 | 2014-06-25 | 鞍山电磁阀有限责任公司 | Electromagnetism movable check valve for nuclear power plant pile top exhaust |
| CN204533744U (en) * | 2015-04-07 | 2015-08-05 | 新昌县森源精密机械有限公司 | A kind of solenoid valve |
| CN105003717A (en) * | 2015-07-21 | 2015-10-28 | 张志通 | Electromechanical electromagnetic valve |
| CN205331437U (en) * | 2015-12-15 | 2016-06-22 | 黄河 | Pneumatic stop valve |
| CN210600387U (en) * | 2019-09-29 | 2020-05-22 | 鞍山电磁阀有限责任公司 | Self-holding type electromagnetic valve |
-
2019
- 2019-09-29 CN CN201910937792.8A patent/CN110566712A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1130354A (en) * | 1997-07-14 | 1999-02-02 | Fuji Koki Corp | Electric operated valve |
| CN2784677Y (en) * | 2004-12-10 | 2006-05-31 | 鞍山电磁阀有限责任公司 | Intelligent high-temperature high-pressure solenoid valve |
| CN102330834A (en) * | 2011-09-07 | 2012-01-25 | 浙江中宝自控元件有限公司 | Electromagnetic valve |
| WO2013097445A1 (en) * | 2011-12-31 | 2013-07-04 | Danfoss (Tianjin) Ltd. | Solenoid valve |
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| CN210600387U (en) * | 2019-09-29 | 2020-05-22 | 鞍山电磁阀有限责任公司 | Self-holding type electromagnetic valve |
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