CN111336018B - Electromagnetic valve switch of slide valve structure for purging fuel oil - Google Patents
Electromagnetic valve switch of slide valve structure for purging fuel oil Download PDFInfo
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- CN111336018B CN111336018B CN202010245689.XA CN202010245689A CN111336018B CN 111336018 B CN111336018 B CN 111336018B CN 202010245689 A CN202010245689 A CN 202010245689A CN 111336018 B CN111336018 B CN 111336018B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/22—Fuel supply systems
- F02C7/232—Fuel valves; Draining valves or systems
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
An electromagnetic valve switch of a sliding valve structure for purging fuel oil comprises an electromagnetic valve and a sliding valve which are arranged on a main shell, wherein a gas flow passage is formed inside the main shell, a baffle at the end part of the electromagnetic valve is tightly attached and sealed with the ring surface of a valve seat, the sliding valve is arranged in a bushing, a valve body inner cavity communicated with the gas flow passage is formed inside the sliding valve, the valve body inner cavity is supported by a spring, and a sliding valve air outlet hole is formed in the sliding valve; the main shell body on two sides along the moving direction of the slide valve is provided with a gas inlet and a gas outlet, and the valve seat is provided with a vent hole for communicating the inner cavity of the valve body with the outside atmosphere. When the electromagnetic valve is powered on, the armature iron moves against the elastic force of the spring under the action of electromagnetic force, the inner cavity of the valve body is communicated with the outside atmosphere, the air pressure in the inner cavity of the valve body is reduced, the pressure difference exists between the inner cavity of the valve body and the inlet, air enters the inner cavity of the valve body through the air inlet, the slide valve moves against the elastic force of the spring under the action of air pressure pushing, and the air inlet is communicated with the air outlet. The invention has simple structure and high reliability.
Description
Technical Field
The invention relates to a gas turbine air system component, in particular to a solenoid valve switch of a slide valve structure for purging fuel oil.
Background
After a fuel oil system of the gas turbine is stopped, residual fuel oil exists in a pipeline of the gas turbine, and an air system is required to be used for purging, so that the situation that explosion happens to the residual fuel oil in the system when ignition occurs to cause safety accidents is prevented. Because the gas turbine has two ways of oil supply, two ways of purging valve switches need to be designed. At present, a convenient and reliable electromagnetic valve switch is not provided.
Disclosure of Invention
The invention aims to provide a solenoid valve switch of a slide valve structure for purging fuel oil, which aims at solving the problem that the residual fuel oil of a fuel oil system of a gas turbine in the prior art is inconvenient to clean, and has the advantages of simple structure, convenience in use and high reliability.
In order to achieve the purpose, the electromagnetic valve switch of the slide valve structure for purging fuel oil has the following technical scheme:
the slide valve comprises an electromagnetic valve and a slide valve which are arranged on a main shell, wherein a gas flow passage is formed in the main shell, a baffle at the end part of the electromagnetic valve is tightly attached and sealed with the ring surface of a valve seat, the slide valve is arranged in a bushing, a valve body inner cavity communicated with the gas flow passage is formed in the slide valve, the valve body inner cavity is supported through a spring, and a slide valve air outlet hole is formed in the slide valve; the main shell is provided with a gas inlet and a gas outlet along the moving direction of the slide valve, and the valve seat is provided with a vent hole communicated with the inner cavity of the valve body and the outside atmosphere; in a closed state, after the gas inlet is ventilated, the pressure of the inner cavity of the valve body is balanced with the pressure of the gas inlet, the slide valve does not move, and the gas inlet and the gas outlet are closed; when the electromagnetic valve is powered on, the armature iron moves under the action of electromagnetic force to overcome the elastic force of the spring, the baffle plate is separated from the valve seat, the inner cavity of the valve body is communicated with the outside atmosphere, the air pressure in the inner cavity of the valve body is reduced, the pressure difference exists between the inner cavity of the valve body and the inlet, air enters the inner cavity of the valve body through the air inlet, the slide valve moves under the action of air pressure pushing against the elastic force of the spring, and the air inlet and the air outlet on the.
Preferably, in an embodiment of the solenoid valve switch of the slide valve structure for purging fuel according to the present invention:
the gas inlet and the gas outlet are arranged on the main shell at two sides of the slide valve in a staggered mode.
Preferably, in an embodiment of the solenoid valve switch of the slide valve structure for purging fuel according to the present invention:
the main shell is provided with an air release port communicated with the inner cavity of the valve body.
Preferably, in an embodiment of the solenoid valve switch of the slide valve structure for purging fuel according to the present invention: an expansion ring is arranged between the outer wall of the sliding valve and the inner wall of the bushing; a sealing ring is arranged between the lining and the main shell.
Preferably, in an embodiment of the solenoid valve switch of the slide valve structure for purging fuel according to the present invention:
and filters are arranged on the gas inlet and the gas outlet.
Preferably, in an embodiment of the solenoid valve switch of the slide valve structure for purging fuel according to the present invention:
the aperture of the air outlet of the slide valve is smaller than that of the vent hole of the valve seat.
Preferably, in an embodiment of the solenoid valve switch of the slide valve structure for purging fuel according to the present invention:
the main shell is provided with a stop pin for limiting the moving range of the slide valve.
Preferably, in an embodiment of the solenoid valve switch of the slide valve structure for purging fuel according to the present invention:
the head of the slide valve is conical, and the air outlet hole of the slide valve is formed in the center of the head of the slide valve.
Preferably, in an embodiment of the solenoid valve switch of the slide valve structure for purging fuel according to the present invention:
the head of the slide valve is closed by an end cap connected to the main housing.
Preferably, in an embodiment of the solenoid valve switch of the slide valve structure for purging fuel according to the present invention:
the gas inlet and the gas outlet are respectively connected with the main shell through the gas inlet shell and the gas outlet shell.
Compared with the prior art, the invention has the following beneficial effects: the electromagnetic valve switch is directly connected with a compressed air source and the atmosphere of the gas turbine, and when power is not supplied to the electromagnetic coil, the valve seat is closed, air is not discharged to the atmosphere, and pressure difference does not exist. The pressure at the back of the slide valve is the same as that at the front of the slide valve, and the gas inlet and the gas outlet are closed. When power is supplied to the electromagnet, the valve seat is opened to release air to atmosphere, the pressure at the rear part of the slide valve is rapidly reduced, the slide valve moves against the elastic force of the spring, and the gas inlet is communicated with the gas outlet, so that compressed air enters the gas turbine. When the gas turbine is stopped, the control cabinet sends signals to the purging electromagnetic valves of the two nozzle oil paths so as to purge residual oil of the ring pipe and the oil nozzle. The invention has simple structure, wide application pressure range and high reliability, can be used for purging by air in a fuel oil system, and can be popularized to purging other media (such as fuel gas).
Drawings
FIG. 1 is a schematic view of the overall structure of a solenoid valve switch according to the present invention;
FIG. 2 is a schematic structural view of a solenoid valve switch of the present invention in a closed state;
FIG. 3 is a schematic structural diagram of the solenoid valve switch of the present invention in an open state;
in the drawings: 1-an electromagnetic valve; 2-valve seat; 3-a main housing; 4-stop pin; 5-sealing ring; 6-a lining; 7-a spring; 8-a slide valve; 9-a filter; 10-end cap; 11-air intake housing.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Referring to fig. 1, the solenoid valve switch of the present invention includes a solenoid valve 1 and a spool valve 8 mounted on a main housing 3, a gas flow passage is formed inside the main housing 3, and an end baffle of the solenoid valve 1 is tightly sealed with an annular surface of a valve seat 2 to block gas in the main housing 3 from flowing out. The slide valve 8 is arranged in the bushing 6, the inside of the slide valve 8 is a valve body inner cavity communicated with the gas flow passage, the valve body inner cavity is supported by a spring 7, and a slide valve air outlet hole is formed in the slide valve 8. The head of the spool valve 8 is closed by an end cap 10 connected to the main housing 3. The head of the slide valve 8 is conical, and the slide valve air outlet hole is arranged in the center of the head of the slide valve 8.
The main shell 3 on two sides along the moving direction of the slide valve 8 is provided with a gas inlet and a gas outlet, and the gas inlet and the gas outlet are arranged on the main shell 3 on two sides of the slide valve 8 in a staggered manner. The valve seat 2 is provided with a vent hole communicated with the inner cavity of the valve body and the outside atmosphere, and the gas inlet and the gas outlet are provided with filters 9. The main shell 3 is provided with an air release port communicated with the inner cavity of the valve body. An expansion ring is arranged between the outer wall of the slide valve 8 and the inner wall of the bush 6; a seal ring 5 is provided between the bush 6 and the main casing 3. The gas inlet and gas outlet are connected to the main housing 3 through a gas inlet housing 11 and a gas outlet housing, respectively.
The aperture of the slide valve air outlet is smaller than that of the vent hole of the valve seat 2. When the electromagnetic valve switch is in a closed state, the pressure of the inner cavity of the valve body is balanced with the pressure of the gas inlet after the gas inlet is ventilated, the slide valve 8 does not move, and the gas inlet and the gas outlet are closed; when the electromagnetic valve 1 is electrified, the armature iron moves under the action of electromagnetic force to overcome the elastic force of the spring 7, the baffle plate is separated from the valve seat 2, the inner cavity of the valve body is communicated with the outside atmosphere, the air pressure in the inner cavity of the valve body is reduced, the pressure difference exists between the inner cavity of the valve body and the inlet, air enters the inner cavity of the valve body through the air inlet, the slide valve 8 moves under the pushing action of the air pressure to overcome the elastic force of the spring 7, and the air inlet and the air outlet on the main shell. The main housing 3 is provided with a stopper pin 4 for limiting the movable range of the spool valve 8.
When the electromagnetic valve 1 is not powered, the valve seat 2 is closed, no air is discharged to the atmosphere, and no pressure difference exists. The pressure behind the slide valve 8 is the same as before the pressure in the front. The combined force of the spring 7 and air pressure presses the spool 8 against the stop pin 4 and compressed air does not enter the valve.
When the electromagnetic valve 1 is powered, the valve seat 2 is opened to discharge air to the atmosphere. The pressure in the rear part of the slide valve 8 drops sharply. The pressure of the air acts on the front of the slide 8 to press the slide 8 against the stop pin 4. Compressed air is admitted to the gas turbine.
The working process and principle of the solenoid valve switch of the present invention are explained in detail as follows:
1) the purge solenoid valve is in a closed state;
the purge electromagnetic valve realizes the on-off of the inlet and the outlet by controlling the on-off of the electromagnetic valve 1. Referring to fig. 2, in this state, the electromagnetic valve 1 is not energized, the baffle of the electromagnetic valve 1 is tightly sealed with the annular surface of the valve seat 2, the gas in the shell is blocked from flowing out, and the slide valve is in a left end stop position under the action of the force of the spring 7. When air with certain pressure is introduced into the inlet, the air enters the inner cavity of the valve body from the phi C air hole, and the pressure in the inner cavity of the valve body is equal to the pressure at the inlet because the inner cavity of the valve body is a closed space, so that the slide valve is in a stress balance state. The slide valve is at the left end position under the action of the elastic force of the spring 7, and at the moment, a gas inlet and a gas outlet of the purge electromagnetic valve are not communicated.
2) The purge solenoid valve is in an open state;
when working voltage is supplied to the electromagnetic valve 1, the armature iron of the electromagnetic valve 1 overcomes the elastic force of the spring 7 to move towards the left end under the action of electromagnetic force, the baffle plate is separated from the valve seat 2, the inner cavity of the valve body is communicated with the atmosphere, air in the inner cavity of the valve body is discharged from the port B through the hole phi A of the valve seat 2, and the air pressure in the inner cavity of the valve body is reduced; meanwhile, with the reduction of the air pressure in the inner cavity of the valve body, the pressure difference exists between the inner cavity of the valve body and the inlet, the air at the inlet of the valve enters the inner cavity of the valve body through the phi C hole on the slide valve 8, and the diameter (phi A) of the valve seat 2 of the electromagnetic valve 1 is larger than the diameter (phi C) of the hole of the slide valve 8, wherein the phi A is larger than the phi C, preferably, the phi A is 1.2, and the phi C is 0.5. The pressure in the inner cavity of the valve body is further reduced, when the pressure in the inner cavity of the valve body is reduced to a certain degree, the stress balance of the slide valve 8 is broken, the slide valve 8 moves rightwards under the action of thrust generated by the pressure difference between the air inlet and the inner cavity of the valve body until the stop position (shown in figure 3), and at the moment, the inlet and the outlet of the purge solenoid valve are communicated.
The electromagnetic valve switch of the sliding valve structure for purging fuel oil provided by the invention has the advantages of simple structure, wide application pressure range and high reliability, and can be used for purging a fuel oil system by air and also can be popularized to purging other media (such as fuel gas).
The above description is only a preferred embodiment of the present invention, and is not intended to limit the technical solution of the present invention, and it should be understood by those skilled in the art that the technical solution can be modified and replaced by a plurality of simple modifications and replacements without departing from the spirit and principle of the present invention, and the modifications and replacements also belong to the protection scope defined by the claims.
Claims (8)
1. The utility model provides a sweep solenoid valve switch of slide valve structure for fuel which characterized in that: the valve comprises an electromagnetic valve (1) and a slide valve (8) which are arranged on a main shell (3), wherein a gas flow passage is formed inside the main shell (3), a baffle at the end part of the electromagnetic valve (1) is tightly attached and sealed with the ring surface of a valve seat (2), the slide valve (8) is arranged in a bushing (6), a valve body inner cavity communicated with the gas flow passage is arranged inside the slide valve (8), the valve body inner cavity is supported by a spring (7), and a slide valve air outlet hole is formed in the slide valve (8); a gas inlet and a gas outlet are formed in the main shell (3) on two sides along the moving direction of the sliding valve (8), and a vent hole communicated with the inner cavity of the valve body and the outside atmosphere is formed in the valve seat (2); in a closed state, after the gas inlet is ventilated, the pressure of the inner cavity of the valve body is balanced with the pressure of the gas inlet, the slide valve (8) does not move, and the gas inlet and the gas outlet are closed; when the electromagnetic valve (1) is electrified, the armature iron moves under the action of electromagnetic force to overcome the elastic force of the spring (7), the baffle plate is separated from the valve seat (2), the inner cavity of the valve body is communicated with the outside atmosphere, the air pressure in the inner cavity of the valve body is reduced, the pressure difference exists between the inner cavity of the valve body and the inlet, air enters the inner cavity of the valve body through the air inlet, the slide valve (8) moves under the action of air pressure pushing to overcome the elastic force of the spring (7), and the air inlet and the air outlet on the main shell (3); the main shell (3) is provided with an air release port communicated with the inner cavity of the valve body; the head of the slide valve (8) is conical, and an air outlet hole of the slide valve is formed in the center of the head of the slide valve (8).
2. A solenoid valve switch of a slide valve structure for purge fuel according to claim 1, characterized in that:
the gas inlet and the gas outlet are arranged on the main shell (3) at two sides of the slide valve (8) in a staggered mode.
3. A solenoid valve switch of a slide valve structure for purge fuel according to claim 1, characterized in that: an expansion ring is arranged between the outer wall of the slide valve (8) and the inner wall of the bushing (6); a sealing ring (5) is arranged between the lining (6) and the main shell (3).
4. A solenoid valve switch of a slide valve structure for purge fuel according to claim 1, characterized in that:
and filters (9) are arranged on the gas inlet and the gas outlet.
5. A solenoid valve switch of a slide valve structure for purge fuel according to claim 1, characterized in that:
the aperture of the air outlet of the slide valve is smaller than that of the vent hole of the valve seat (2).
6. A solenoid valve switch of a slide valve structure for purge fuel according to claim 1, characterized in that:
the main shell (3) is provided with a stop pin (4) used for limiting the moving range of the slide valve (8).
7. A solenoid valve switch of a slide valve structure for purge fuel according to claim 1, characterized in that:
the head of the slide valve (8) is closed by an end cover (10) connected to the main housing (3).
8. A solenoid valve switch of a slide valve structure for purge fuel according to claim 1, characterized in that:
the gas inlet and the gas outlet are respectively connected with the main shell (3) through the gas inlet shell (11) and the gas outlet shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010245689.XA CN111336018B (en) | 2020-03-31 | 2020-03-31 | Electromagnetic valve switch of slide valve structure for purging fuel oil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010245689.XA CN111336018B (en) | 2020-03-31 | 2020-03-31 | Electromagnetic valve switch of slide valve structure for purging fuel oil |
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| Publication Number | Publication Date |
|---|---|
| CN111336018A CN111336018A (en) | 2020-06-26 |
| CN111336018B true CN111336018B (en) | 2021-06-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010245689.XA Active CN111336018B (en) | 2020-03-31 | 2020-03-31 | Electromagnetic valve switch of slide valve structure for purging fuel oil |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103604893A (en) * | 2013-10-29 | 2014-02-26 | 徐继承 | Two-position five-way positive and negative pressure reversing valve-possessed sample introduction evaporator for examination |
| CN208350823U (en) * | 2018-07-20 | 2019-01-08 | 北京诺德泰科仪器仪表有限公司 | The ball valve blow device of elemental analyser solid sampler |
| CN109899161A (en) * | 2019-03-07 | 2019-06-18 | 中国科学院工程热物理研究所 | A kind of liquid fuel metering device |
-
2020
- 2020-03-31 CN CN202010245689.XA patent/CN111336018B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103604893A (en) * | 2013-10-29 | 2014-02-26 | 徐继承 | Two-position five-way positive and negative pressure reversing valve-possessed sample introduction evaporator for examination |
| CN208350823U (en) * | 2018-07-20 | 2019-01-08 | 北京诺德泰科仪器仪表有限公司 | The ball valve blow device of elemental analyser solid sampler |
| CN109899161A (en) * | 2019-03-07 | 2019-06-18 | 中国科学院工程热物理研究所 | A kind of liquid fuel metering device |
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| Publication number | Publication date |
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| CN111336018A (en) | 2020-06-26 |
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