CN211693544U - Normally closed electromagnetic valve for gas pipeline - Google Patents
Normally closed electromagnetic valve for gas pipeline Download PDFInfo
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- CN211693544U CN211693544U CN202020727301.5U CN202020727301U CN211693544U CN 211693544 U CN211693544 U CN 211693544U CN 202020727301 U CN202020727301 U CN 202020727301U CN 211693544 U CN211693544 U CN 211693544U
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Abstract
The utility model provides a pair of normally closed solenoid valve for gas pipeline, mainly adopt the big latus rectum of gas inlet pipeline, the structural design of the little latus rectum of gas outlet pipeline, utilize gas pressure (1MPa and below) to be greater than gas pressure (8KPa and below) far away in the gas outlet pipeline in the gas inlet pipeline simultaneously, not only ensure that normally closed solenoid valve is instantaneous to open and close like this, and gaseous powerful pressure effect has realized in the gas inlet pipeline under non-electrified state that normally closed solenoid valve keeps apart sealedly to gas outlet pipeline gas reliably, can also ensure when electrified start-up in the gas inlet pipeline 1MPa and following gas can the instantaneous flow in the gas outlet pipeline.
Description
Technical Field
The utility model belongs to the technical field of gas control, a normally closed solenoid valve is related to, especially relate to a normally closed solenoid valve for gas pipeline.
Background
The electromagnetic valve in the gas pipeline generally comprises a straight-through electromagnetic valve and a pilot electromagnetic valve, is widely applied to supply, transmission, control and power systems of fluid such as liquid, gas and the like, and is self-locked in a normally open working state and a normally closed working state by means of electromagnetic attraction, gas pressure and spring force, so that the purpose of controlling the conduction and the cut-off of the valve is achieved, and the electromagnetic valve is a key part of the whole system.
The conventional straight-through electromagnetic valve is of a single body design (the electromagnetic valve is opened during normal work and closed during non-work), and front and rear gas inlet and outlet pipelines are not crossed, but if the inlet gas pressure exceeds 0.3MPa, the electromagnetic valve cannot be opened.
The operating principle of the pilot-operated electromagnetic valve is as follows: when the power is on, the pilot hole is opened by electromagnetic force, the pressure in the upper chamber is rapidly reduced, a low-high pressure difference is formed around the closing member, the closing member is pushed by fluid pressure to move upwards, and the valve is opened; when the power is cut off, the spring force closes the pilot hole, the inlet pressure forms a low-low high pressure difference around the valve closing member through the bypass hole rapid chamber, and the fluid pressure pushes the closing member to move downwards to close the valve. The solenoid valve has little delay in the whole process of the pilot-operated solenoid valve, is not timely between on-off switching, and has complex structure, high sealing requirement, high requirement on the quality of compressed air and poor reliability compared with a direct-acting solenoid valve.
Disclosure of Invention
In order to solve the technical problem that above-mentioned exists, the utility model provides a gaseous butt joint export of non-electrified state and gas are sealed to the gaseous complete isolation between the access mouth, electrified start can be instantaneously opened be used for gas piping normally closed solenoid valve, include:
the valve island comprises a valve island body and a gas pipeline arranged in the valve island body; and
the electromagnetic valve is installed on the valve island body and used for electromagnetically controlling the on-off of gas in the gas pipeline, the gas pipeline is disconnected in an uncharged state, the gas on two sides of the gas pipeline is isolated, and the electromagnetic valve is instantly opened under the condition of electrified starting.
The valve island body is also provided with a circular groove; the gas pipeline comprises a gas inlet pipeline, a gas butt joint inlet connected with the two ends of the gas inlet pipeline, a gas pipeline inlet connected with a gas source, a gas outlet pipeline and a gas butt joint outlet connected with the gas pipeline inlet and the gas outlet pipeline, the circular groove is formed in one side face of the valve island body, the gas butt joint outlet is an annular bulge arranged at the center of the circular groove, the gas butt joint inlet is formed in the circular groove and is staggered with the gas butt joint outlet, and the diameter of the gas butt joint outlet is smaller than that of the purging gas butt joint inlet.
The air pressure of the air source is 1Mpa or less.
The air pressure of the air source is 0.6Mpa or less.
The above-mentioned solenoid valve includes:
the outer sleeve is arranged on the circular groove of the valve island body and used for sealing outwards, and comprises an outer sleeve body with an outer edge at the bottom end, an annular magnetic conduction groove, a screw and an O-shaped sealing ring; the outer edge of the bottom end of the outer sleeve body is fixed with the valve island body through a screw, and an annular groove capable of being embedded with an O-shaped sealing ring is formed in the bottom surface of the outer sleeve body; the annular magnetic conduction groove is formed in the outer side surface of the upper end part of the outer sleeve body; the outer sleeve body is made of a non-magnetic-conductive metal material;
the static iron core is used for generating electromagnetic force and is embedded into the outer sleeve body through interference;
the movable iron core generates upward electromagnetic suction force to the static iron core, so that the gas butt joint outlet and the gas butt joint inlet are in gas communication, and the movable iron core moving axially is arranged in the outer sleeve body and is arranged on the lower side of the static iron core in the outer sleeve body; the movable iron core comprises a movable iron core body and a ventilation side groove, a transverse air hole and an upward groove of the movable iron core body; the upward groove is formed in the center of the upper end face of the movable iron core body, the ventilation side face groove is formed in the side surface of the movable iron core body, and the upward groove is communicated with the ventilation side face groove through a transverse air hole;
the reset spring is used for resetting the movable iron core body in the outer sleeve body so as to disconnect the gas between the gas butt joint outlet and the gas butt joint inlet; one end of a return spring is clamped in the upward groove of the movable iron core body, and the other end of the return spring abuts against the lower end face of the static iron core;
the electromagnetic coil is used for enabling the static iron core to generate magnetic force so as to attract the movable iron core and comprises a coil, a framework, a baffle ring and a shell, the coil is wound in the framework, embedded in the shell and fixed by the baffle ring, and the electromagnetic coil is sleeved outside the outer sleeve body; and
and the upper end nut is screwed on the upper end head of the outer sleeve body through threads to fix the electromagnetic coil outside the outer sleeve body up and down.
The lower end face of the movable iron core body is also provided with a downward groove and a sealing gasket embedded in the downward groove.
The non-magnetic conductive metal material is stainless steel, copper or aviation aluminum.
The utility model provides a pair of normally closed solenoid valve for gas pipeline, mainly adopt the big latus rectum of gas outlet pipeline, the structural design of the little latus rectum of gas inlet pipeline, utilize gas pressure (1MPa and below) to be greater than gas pressure (8KPa and below) far away in the gas outlet pipeline in the gas inlet pipeline simultaneously, not only ensure that normally closed solenoid valve is instantaneous to open and close like this, and gaseous powerful pressure effect has realized in the gas inlet pipeline under non-electrified state that normally closed solenoid valve keeps apart sealedly to gas outlet pipeline gas reliably, can also ensure when electrified start-up in the gas inlet pipeline 1MPa and following gas can the instantaneous flow in the gas outlet pipeline.
Drawings
Fig. 1 is the utility model provides a normally closed solenoid valve for gas pipeline.
Detailed Description
The normally closed solenoid valve for a gas pipeline provided by the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, a schematic structural diagram of a normally closed solenoid valve for a gas pipeline provided by the present invention includes a valve island 100 and a solenoid valve;
the valve island 100 comprises a valve island body 100A, a gas pipeline and a circular groove are arranged in the valve island body; the gas pipeline comprises a gas inlet pipeline 107, a gas butt joint inlet connected with the two ends of the gas inlet pipeline 107 respectively, a gas pipeline inlet connected with a gas source, a gas outlet pipeline 106 and a gas butt joint outlet connected with the gas pipeline, the circular groove is formed in one side face of the valve island body, the gas butt joint outlet is an annular bulge arranged at the center of the circular groove, the gas butt joint inlet is formed in the circular groove and is staggered with the gas butt joint outlet, and the through diameter of the gas butt joint outlet is smaller than that of the gas butt joint inlet.
The electromagnetic valve is arranged on the circular groove of the valve island body 100A and used for electromagnetically controlling the on-off of gas in the gas pipeline, the gas pipeline is disconnected in an uncharged state, the gas on two sides of the gas pipeline is isolated, and the gas pipeline is instantly opened under the condition of electrified starting; comprises an outer sleeve, a static iron core 220, a movable iron core, a return spring 230, an electromagnetic coil and an upper end nut 260.
The outer sleeve is arranged in a circular groove of the valve island body and used for sealing the outside, and comprises an outer sleeve body 210 with an outer edge at the bottom end, an annular magnetic conduction groove 211, a screw 212 and an O-shaped sealing ring 213; wherein the outer edge of the bottom end of the outer sleeve body 210 is fixed with the valve terminal body 100A by screws, and an annular groove capable of being embedded with an O-ring 213 is arranged on the bottom surface thereof; the annular magnetic conduction groove 211 is formed in the outer side surface of the upper end portion of the outer sleeve body 210; the outer sleeve body 210 is made of a non-magnetic conductive metal material, such as stainless steel, copper or aircraft aluminum;
the stationary core 220 is configured to generate an electromagnetic force on the movable core, and is embedded in the outer sleeve body 210 through interference;
the movable iron core generates upward electromagnetic attraction on the static iron core 220, so that the gas butt joint outlet is in gas communication with the gas butt joint inlet; the movable iron core moving axially is arranged in the outer sleeve body 210 and is installed at the lower side of the stationary iron core 220 in the outer sleeve body 210; the air-permeable movable iron core comprises a movable iron core body 240 and an air-permeable side groove 242, a transverse air hole 241 and an upward groove thereof; the upward groove is arranged in the center of the upper end face of the movable iron core body 240, the ventilation side face groove 242 is arranged on the side surface of the movable iron core body 240, and the upward groove is communicated with the ventilation side face groove 242 through a transverse air hole 241; in order to better seal the gas butt joint outlet in an uncharged state, a downward groove is arranged at the center of the lower end surface of the movable iron core body 240 and is embedded with a sealing gasket 250 therein;
the return spring 230 is used for returning the movable iron core in the outer sleeve body 210, so that gas is disconnected between the gas butt joint outlet and the gas butt joint inlet; one end of the return spring 230 is clamped into the upward groove of the movable iron core body 240, and the other end of the return spring abuts against the lower end face of the static iron core 220;
the electromagnetic coil is used for enabling the static iron core to generate magnetic force so as to attract the movable iron core body, and comprises a coil 203, a framework 202, a baffle ring 204 and a shell 201, wherein the coil is wound in the framework, embedded in the shell and fixed by the baffle ring; the solenoid is sleeved outside the outer sleeve body 210 and is fixed up and down outside the outer sleeve body 210 by the upper end nut 260.
Firstly, the static iron core 220 is inserted from the lower port of the outer sleeve body in an interference manner, then the return spring 230 and the movable iron core body are sequentially put in from the lower port of the outer sleeve body, and the O-shaped sealing ring 213 is inserted into the annular groove; then the valve terminal is fixed on the side of a valve terminal body with a gas butt joint outlet and a gas butt joint inlet through screws; finally, the solenoid coil is sleeved outside the outer sleeve body from the upper end thereof, and is fixed up and down by an upper end nut 260.
The working principle is as follows:
when the solenoid valve is not operated (i.e., when the coil 203 is not energized): the gas in the gas inlet pipeline (the gas pressure is 1Mpa and below) sequentially passes through the gas butt joint inlet, the ventilation side groove 242 and the transverse gas hole 241 to the space formed between the static iron core 220 and the movable iron core body, the resultant force of the gas pressure of the return spring 230 and the gas inlet pipeline acts on the movable iron core, and the gas butt joint inlet is sealed through the sealing gasket 250. When the electromagnetic valve does not act, the stress of the movable iron core is as follows: the downward elastic force F1 of the return spring, the self gravity F2 of the movable iron core B and the gas entering the gas inlet pipeline into the electromagnetic valve form a downward pressure F3 (about 1MPa of gas pressure and below) and an upward pressure F4 (the gas pressure is 8KPa and below) of the gas in the gas outlet pipeline, so that the gas in the gas inlet pipeline can be ensured not to be communicated into the gas outlet pipeline even if no or little gas in the gas outlet pipeline exists, and the gas isolation between the gas outlet pipeline and the gas inlet pipeline is ensured.
When the solenoid valve is operated (i.e., when coil 203 is energized): the electromagnetic force of the solenoid valve magnetizes the stationary core 220 to attract the movable core body upward to overcome the elastic force of the return spring 230, so that the movable core body approaches the stationary core, thereby opening the gas butt inlet, communicating the gas butt outlet with the gas butt inlet, and thus allowing the gas in the gas inlet pipeline 107 to flow into the gas outlet pipeline 106. The movable iron core body is stressed when the electromagnetic valve acts: the gas butt joint device comprises a downward spring force F1, a downward self gravity F2, an upward pressure F3 (about 8KPa and below) of gas in a gas outlet pipeline, a downward gas pressure F4 (about 1MPa, which is a direction conversion force) of gas in a gas inlet pipeline and an upward electromagnetic force F5, wherein when the gas butt joint device is powered on and opened, the gas butt joint inlet can be opened even by the powerful electromagnetic force of the electromagnetic valve, but in order to reduce the electromagnetic force of the electromagnetic valve when the gas butt joint inlet is opened, the gas butt joint outlet is designed to be large-caliber, and the gas butt joint inlet is designed to be small-caliber, so that the gas in the gas outlet pipeline is well isolated under the uncharged state, no gas leakage between the gas inlet pipeline and the gas outlet pipeline is ensured, and the normally.
The utility model provides a gas source air pressure of the gaseous butt joint entry of normally closed solenoid valve is 1Mpa and below, and normally closed solenoid valve is when the normally closed, and during gaseous not leakage gas outlet pipeline in the gas inlet pipeline, normally closed solenoid valve can guarantee instantaneous disconnection and closure simultaneously.
Claims (5)
1. A normally closed solenoid valve for a gas line, comprising:
the valve island (100) comprises a valve island body (100A) and a gas pipeline arranged in the valve island body; and
an electromagnetic valve mounted on the valve island body (100A),
the solenoid valve includes:
the outer sleeve is arranged on the circular groove of the valve island body and used for sealing outwards, and comprises an outer sleeve body (210) with an outer edge at the bottom end, an annular magnetic conduction groove (211), a screw (212) and an O-shaped sealing ring (213); wherein the outer edge of the bottom end of the outer sleeve body (210) is fixed with the valve island body (100A) through a screw, and the bottom surface of the outer sleeve body is provided with an annular groove in which an O-shaped sealing ring (213) can be embedded; the annular magnetic conduction groove (211) is formed in the outer side surface of the upper end of the outer sleeve body (210); the outer sleeve body (210) is made of a non-magnetic-conductive metal material;
a stationary core (220) for generating an electromagnetic force, which is inserted into the outer sleeve body (210) by interference;
the movable iron core generates upward electromagnetic attraction on the static iron core (220) to ensure that the gas butt joint outlet and the gas butt joint inlet are in gas communication, and the movable iron core moving axially is arranged in the outer sleeve body (210) and is arranged on the lower side of the static iron core (220) in the outer sleeve body (210); the air-permeable movable iron core comprises a movable iron core body (240) and a ventilation side groove (242), a transverse air hole (241) and an upward groove thereof; the upward groove is formed in the center of the upper end face of the movable iron core body (240), the ventilation side face groove (242) is formed in the side surface of the movable iron core body (240), and the upward groove is communicated with the ventilation side face groove (242) through a transverse air hole (241);
the reset spring (230) is used for resetting the movable iron core body in the outer sleeve body (210) to disconnect the gas between the gas butt joint outlet and the gas butt joint inlet, wherein one end of the reset spring (230) is clamped in the upward groove of the movable iron core body (240), and the other end of the reset spring is propped against the lower end face of the static iron core (220);
the electromagnetic coil is used for enabling the static iron core to generate magnetic force so as to attract the movable iron core, and comprises a coil (203), a framework (202), a baffle ring (204) and a shell (201), wherein the coil is wound in the framework, embedded in the shell and fixed by the baffle ring, and the electromagnetic coil is sleeved outside the outer sleeve body (210), and
and the upper end nut (260) is screwed on the upper end head of the outer sleeve body through threads to fix the electromagnetic coil outside the outer sleeve body (210) up and down.
2. The normally closed solenoid valve according to claim 1,
the valve island body (100A) is also provided with a circular groove; the gas pipeline comprises a gas inlet pipeline, a gas butt joint inlet connected with the two ends of the gas inlet pipeline, a gas pipeline inlet connected with a gas source, a gas outlet pipeline and a gas butt joint outlet connected with the gas pipeline inlet and the gas outlet pipeline, the circular groove is formed in one side face of the valve island body, the gas butt joint outlet is an annular bulge arranged at the center of the circular groove, the gas butt joint inlet is formed in the circular groove and is staggered with the gas butt joint outlet, and the diameter of the gas butt joint outlet is smaller than that of the gas butt joint inlet.
3. The normally closed electromagnetic valve according to claim 1, characterized in that the lower end surface of the movable iron core body is further provided with a downward groove and a sealing gasket (250) embedded therein.
4. The normally closed solenoid valve according to claim 1, wherein said non-magnetically conductive metallic material is stainless steel, copper or aircraft aluminum.
5. The normally closed solenoid valve according to claim 1, wherein said non-magnetically conductive metallic material is stainless steel or aircraft aluminum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020727301.5U CN211693544U (en) | 2020-05-07 | 2020-05-07 | Normally closed electromagnetic valve for gas pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020727301.5U CN211693544U (en) | 2020-05-07 | 2020-05-07 | Normally closed electromagnetic valve for gas pipeline |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211693544U true CN211693544U (en) | 2020-10-16 |
Family
ID=72783801
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020727301.5U Active CN211693544U (en) | 2020-05-07 | 2020-05-07 | Normally closed electromagnetic valve for gas pipeline |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211693544U (en) |
-
2020
- 2020-05-07 CN CN202020727301.5U patent/CN211693544U/en active Active
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