CN218624350U

CN218624350U - Anti-fuel hydraulic module set

Info

Publication number: CN218624350U
Application number: CN202222886600.5U
Authority: CN
Inventors: 卢刚; 王海彬; 李成宝; 孙厚武; 李杨; 韩旭; 林森; 武伟; 江晓然; 王成霖; 王禹涵; 赵晗; 徐仁博; 于升旭
Original assignee: Dalian Power Plant of Huaneng International Power Co Ltd
Current assignee: Dalian Power Plant of Huaneng International Power Co Ltd
Priority date: 2022-10-31
Filing date: 2022-10-31
Publication date: 2023-03-14
Anticipated expiration: 2032-10-31

Abstract

The utility model discloses an anti fuel hydraulic module stack, including the off-load valve body, the inside first movable cavity that is equipped with of off-load valve body, the inside cup slide valve that is equipped with of first movable cavity, be located first movable cavity one side of cup slide valve below and seted up first oil inlet, first oil inlet department is equipped with the solenoid valve, the solenoid valve is two cross-connections, the orifice is installed to the solenoid valve entrance, it connects to be AST oil passageway to be located this internal one of solenoid valve oil-out of off-load valve, another oil-out is connected with the oil drain passageway, this application is through setting up the solenoid valve inside at first oil inlet, one of them oil-out of solenoid valve is connected to AST oil passageway, another oil-out is connected with the oil drain passageway, abnormal AST oil had both been discharged through the valves through AST-OPC when the unit takes place, also can discharge the oil drain passageway through the solenoid valve group nearby, the risk that AST discharged the check valve jam and can's unable AST oil of unloading has been avoided, protection has been had been increased one for the anti fuel system.

Description

Anti-fuel hydraulic module set

Technical Field

The utility model relates to a technical field of servomotor specifically is an anti fuel hydraulic module stack.

Background

The traditional fire-resistant oil system uses an integrated inlet quick unloading valve as emergency brake-on oil of the servomotor, and has the advantages that the system is simple in arrangement, once a certain servomotor AST is blocked in an emergency state, the hydraulic oil of the servomotor cannot be discharged, and a steam valve cannot be closed to cause overspeed of a steam turbine; or, due to the long piping arrangement, the AST oil source compressing the unloader valve is discharged through the AST-OPC valve stack, possibly creating a lag that results in a lag in the closing of the valve, and possibly also running the risk of overspeed.

The traditional anti-fuel hydraulic module only depends on one path of the AST oil discharging check valve, once the check valve is blocked, the AST oil of the path of the servomotor cannot be discharged to influence the quick action of a valve, the AST oil on the hydraulic module of the servomotor is quickly discharged, and the quick action of the servomotor under the accident condition is very necessary.

Disclosure of Invention

An object of the utility model is to provide an anti fuel hydraulic module stack to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

the utility model provides an anti fuel hydraulic module stack, includes the unloading valve body, the inside first movable cavity that is provided with of unloading valve body, the inside cup slide valve that is provided with of first movable cavity is located under the cup slide valve first movable cavity bottom is the import of high pressure fire resistant oil, is located cup slide valve below first movable cavity one side has seted up first oil inlet, first oil inlet department is provided with the solenoid valve, the solenoid valve is two cross, the orifice is installed to the solenoid valve entrance, is located this internal one of them oil-out of solenoid valve is connected for AST oil passageway, and another oil-out is connected with oil drain passageway.

Preferably, a second movable chamber is arranged at the top of the first movable chamber, and the second movable chamber is communicated with the first movable chamber through a first channel.

Preferably, the AST oil passage is connected with the second movable chamber through a second passage, the AST oil passage is connected with the cup-shaped slide valve top oil chamber in the second movable chamber through the second passage and the first passage, a fourth passage is arranged on one side, close to the first passage, of the second movable chamber, and a needle valve is arranged at the fourth passage in the second movable chamber.

Preferably, a high-pressure fire-resistant oil discharge hole is formed in one side, away from the first oil inlet, of the first movable cavity inside the unloading valve body, and the top of the high-pressure fire-resistant oil discharge hole is communicated and connected with the second movable cavity through a third channel.

Preferably, an oil drain port is formed in one side, close to the high-pressure fire-resistant oil drain hole, of the cup-shaped sliding valve in the first movable cavity in a penetrating mode, and the oil drain port is connected with the high-pressure fire-resistant oil drain hole in a penetrating mode.

Preferably, the cup slide valve is slidably disposed inside the first movable chamber, and the outer wall of the cup slide valve is connected with the inner wall of the first movable chamber.

Preferably, a base block is arranged below the oil drainage port on the inner walls of the two sides of the first movable chamber, and the bottom of the cup-shaped slide valve is connected with the top of the base block.

Preferably, a valve core is arranged in the cup-shaped sliding valve, the top of the valve core is connected with the top of the first movable chamber, a spring is sleeved and connected on the outer wall of the bottom of the valve core, and the bottom of the spring is connected with the inner wall of the cup-shaped sliding valve.

Preferably, the high-pressure fire-resistant oil inlet is connected with an external high-pressure oil way.

Compared with the prior art, the beneficial effects of the utility model are that:

aiming at the problems in the background art, the electromagnetic valve is arranged in the first oil inlet, the electromagnetic valve is a two-position four-way valve, a throttling hole is arranged at the inlet of the electromagnetic valve, AST oil is formed through the throttling hole, one oil outlet of the electromagnetic valve is connected to an AST oil channel, the other oil outlet of the electromagnetic valve is connected to an oil discharge channel, and the AST oil pressure is arranged on an independently designed cartridge valve to ensure that the system is normally reset; the electromagnetic valves are not electrified daily, when an abnormal signal is given to the ETS system when the unit is shut down, the ETS sends the signal to the AST-OPC valve bank and the electromagnetic valves on the equipment modules simultaneously, so that AST oil can be discharged through the AST pipeline through the AST-OPC valve bank and can also be discharged through the oil discharging channels on the electromagnetic valves nearby, the risk that the AST oil cannot be discharged due to the fact that the AST discharging check valve is blocked is avoided, one protection is provided for an anti-fuel oil system, one redundancy protection is provided, the AST oil discharging channel is enabled to be faster, the AST oil on the hydraulic module of the oil engine is rapidly discharged, the rapid action of the oil engine under the accident condition is ensured, the AST oil discharging channel is increased, one redundancy protection is provided for a single oil engine, and the AST oil can be discharged through the oil discharging channels on the electromagnetic valves once the AST oil discharging check valve is blocked.

The present invention will be explained in detail with reference to the drawings and specific embodiments.

Drawings

FIG. 1 is a schematic view of the unloading valve body and the electromagnetic valve of the present invention;

FIG. 2 is a front view of the present invention;

fig. 3 is a sectional view of the internal structure of the present invention;

fig. 4 is a front view of the solenoid valve of the present invention.

Description of the drawings: 1. an unloading valve body; 2. a first movable chamber; 11. a cup-shaped spool valve; 13. a first oil inlet; 15. a first channel; 16. a second channel; 22. a third channel; 23. an oil drainage port; 24. a base block; 17. a fourth channel; 25. a high pressure fire resistant oil inlet; 3. an electromagnetic valve; 31. an AST oil channel; 32. an oil discharge passage; 4. a second movable chamber; 21. and a high-pressure fire-resistant oil drain hole.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, rather than all embodiments, and based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the scope of protection of the present invention.

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. Several embodiments of the present invention are presented. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Please refer to fig. 1-4, the fuel-resistant hydraulic module set includes an unloading valve body 1, a first movable chamber 2 is arranged in the unloading valve body 1, a cup-shaped slide valve 11 is arranged in the first movable chamber 2, a high-pressure fuel-resistant oil inlet 25 is arranged at the bottom of the first movable chamber 2 under the cup-shaped slide valve 11, a first oil inlet 13 is arranged at one side of the first movable chamber 2 under the cup-shaped slide valve 11, an electromagnetic valve 3 is arranged at the first oil inlet 13, the electromagnetic valve 3 is a two-position four-way valve, a throttle hole is arranged at the inlet of the electromagnetic valve 3, one oil outlet of the electromagnetic valve 3 in the unloading valve body 1 is connected to an AST oil channel 31, the other oil outlet is connected to an oil discharge channel 32, the electromagnetic valve 3 is arranged in the first oil inlet 13, the electromagnetic valve 3 is a two-position four-way valve, the throttle hole is arranged at the inlet of the electromagnetic valve 3, AST oil is formed by the throttle hole, one oil outlet of the electromagnetic valve 3 is connected to an AST cartridge oil channel 31, the other oil outlet is connected to an oil discharge channel 32, and the AST oil pressure valve designed independently is ensured to be reset normally; the electromagnetic valve 3 is not electrified daily, when the unit generates an abnormal signal and sends the abnormal signal to the ETS system, the ETS sends the signal to the AST-OPC valve bank and the electromagnetic valve on the equipment module at the same time, so that the AST oil can be discharged through the AST-OPC valve bank through an AST pipeline, and can also be discharged through the oil discharging channel 32 on the electromagnetic valve 3 nearby, the risk that the AST oil cannot be discharged due to the fact that the AST discharging check valve is blocked is avoided, one protection is provided for an anti-oil system, one path of redundant protection is provided, the AST oil discharging channel is faster, the AST oil on the hydraulic module of the oil engine is rapidly discharged, the rapid action of the oil engine under the accident condition is ensured, the AST oil discharging channel is increased, one path of redundant protection is provided for a single oil engine, and once the AST oil discharging check valve is blocked, the oil can be discharged through the oil discharging channel 32 on the electromagnetic valve 3.

Specifically, please refer to fig. 2 and 3 again, a second movable chamber 4 is disposed at the top of the first movable chamber 2, the second movable chamber 4 is connected with the first movable chamber 2 through a first passage 15, an AST oil passage 31 is connected with the second movable chamber 4 through a second passage 16, the AST oil passage 31 is connected with a top oil chamber of the cup-shaped slide valve 11 in the second movable chamber 4 through the second passage 16 and the first passage 15, a fourth passage 17 is disposed in the second movable chamber 4 near the first passage 15, a needle valve is disposed in the fourth passage 17 of the second movable chamber 4, a high-pressure fire-resistant oil discharge hole 21 is disposed in the first movable chamber 2 far away from the first oil inlet 13, the top of the high-pressure fire-resistant oil discharge hole 21 is connected with the second movable chamber 4 through a third passage 22, a drain port 23 is disposed in the first movable chamber 2 near the high-pressure fire-resistant oil discharge hole 21, the drain port 23 is connected with the high-pressure fire-resistant oil discharge hole 21, the top of the cup-shaped slide valve 11 is disposed in the first movable chamber 2, the inner wall of the cup-shaped slide valve 11 is connected with an inner wall of the cup-shaped slide valve base 24, and an inner wall of the slide valve base 24, the bottom of the slide valve base is connected with an inner wall of the cup-shaped slide valve base 24, and an inner wall of the slide valve base 24, the cup-shaped slide valve base 11, the slide valve base, the slide valve 2, and an inner wall of the slide valve base are connected with an inner wall of the base seat 11.

It should be noted that, in this embodiment, the high pressure fire resistant oil inlet 25 at the bottom of the first movable chamber 2 at the lower part of the cup-shaped slide valve 11 is communicated with the high pressure oil passage at the lower part of the oil engine piston and is acted by high pressure oil, during normal operation, the electromagnetic valve 3 is connected with an external power supply mechanism, the AST oil passage 31 at the upper part of the electromagnetic valve 3 is opened, the oil drain passage 32 is closed, the high pressure oil passes through the first oil inlet 13 and the AST oil passage 31 to pass a small amount of pressure oil to the oil chamber at the upper part of the cup-shaped slide valve 11, during normal operation, the oil pressure at the oil cut-off main pipe is equal to the oil pressure of the high pressure oil, which pushes against the spool and closes the oil drain port 23, the pressure oil at the upper part of the cup-shaped slide valve 11 cannot be drained from this passage, the electromagnetic valve 3 controls the opening of the first oil inlet 13 to further control the oil pressure at the upper part of the cup-shaped slide valve 11 for adjustment, during normal operation, the oil pressure acting force at the upper part of the cup-shaped slide valve 11 plus the spring acting force of the high pressure oil at the lower part of the cup-shaped slide valve 11 is greater than the high pressure oil passage at the lower part of the cup-shaped slide valve 11, the oil passage 11 to open the oil drain port 21 at the upper part of the cup-shaped slide valve 11, the upper part of the cup-shaped slide valve 11 to push the oil drain passage 11 to open the second oil passage 11, the high pressure oil passage 21, the oil drain passage 21, the oil passage 11 to pass through the high pressure oil passage 21, the oil drain passage 21, the high pressure oil passage 11, the oil channel 32, the oil passage 22 of the upper part of the high pressure oil channel connected to pass through the oil channel 21, the oil drain port 21, the high pressure oil channel 21, the oil drain port of the high pressure oil channel connected to the high pressure oil drain port of the high pressure oil channel 21, and the valve quickly descends under the action of the spring force, and the main valve is closed, so that the unit is stopped.

The utility model discloses a concrete flow is as follows:

when the high-pressure anti-fuel oil valve works, a high-pressure anti-fuel oil inlet 25 at the bottom of a first movable chamber 2 at the lower part of a cup-shaped slide valve 11 is communicated with a high-pressure oil path at the lower part of a piston of an oil engine and is acted by high-pressure oil, when the high-pressure anti-fuel oil valve works normally, an electromagnetic valve 3 is connected with an external power supply mechanism, an AST oil channel 31 on the electromagnetic valve 3 is opened, an oil discharge channel 32 is closed, the high-pressure oil passes through a first oil inlet 13 and the AST oil channel 31 to enable a small amount of pressure oil to pass to an oil chamber at the upper part of the cup-shaped slide valve 11, when the high-pressure oil valve works normally, the oil pressure at the upper part of the cup-shaped slide valve 11 is propped against a valve core due to the oil pressure on an oil cutting-off main pipe and enables an oil discharge port 23 to be closed, the pressure oil at the upper part of the cup-shaped slide valve 11 cannot be discharged from the oil path, the electromagnetic valve 3 controls the opening of the first oil inlet 13 to further control the upper part of the cup-shaped slide valve 11 for debugging and setting, when the oil pressure acting force of the upper part of the cup-shaped slide valve 11 and the spring are normally operated normally, and the acting force of the high-pressure oil-pressed by the lower part of the cup-shaped slide valve 11 is greater than the acting force of the high-shaped slide valve 11, when the electromagnetic valve 3 with a steam turbine failure works, the AST oil channel 31 on the electromagnetic valve 3 is closed, the oil discharge channel 32 is opened, the oil main pipe loses pressure, pressure oil acting on the cup-shaped sliding valve 11 jacks the fourth channel 17, high-pressure oil on the cup-shaped sliding valve 11 is discharged through the second movable chamber 4, the third channel 22 and the high-pressure fire-resistant oil discharge hole 21, the oil pressure on the cup-shaped sliding valve 11 drops sharply, the high-pressure oil in the first movable chamber 2 at the bottom of the cup-shaped sliding valve 11 pushes the cup-shaped sliding valve 11 to move upwards, the oil discharge port 23 is opened, and the high-pressure oil in the AST oil channel 31 is discharged through the oil discharge channel 32 connected on the electromagnetic valve 3, so that the high-pressure oil in the oil moving machine loses pressure and is acted by a spring force, and (4) rapidly descending, and closing the main throttle valve to stop the unit.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides an anti fuel hydraulic module stack, includes unloading valve body (1), its characterized in that, unloading valve body (1) inside is provided with first activity cavity (2), first activity cavity (2) inside is provided with cup slide valve (11), is located under cup slide valve (11) first activity cavity (2) bottom is high pressure fire-resistant oil import (25), is located cup slide valve (11) below first activity cavity (2) one side has seted up first oil inlet (13), first oil inlet (13) department is provided with solenoid valve (3), solenoid valve (3) are two cross, the orifice is installed to solenoid valve (3) entrance, is located in unloading valve body (1) one of them oil-out connection of solenoid valve (3) is AST oil duct (31), and another oil-out connection has oil drain passageway (32).

2. The anti-fuel hydraulic module set according to claim 1, characterized in that a second movable chamber (4) is arranged on the top of the first movable chamber (2), and the second movable chamber (4) is connected with the first movable chamber (2) through a first passage (15).

3. A fuel-resistant hydraulic module stack according to claim 2, characterized in that the AST oil channel (31) is connected through a second channel (16) to the second movable chamber (4), the AST oil channel (31) is connected through the second channel (16) and a first channel (15) to a top oil chamber of the cup-shaped slide valve (11) in the second movable chamber (4), a fourth channel (17) is provided in the second movable chamber (4) on a side close to the first channel (15), and a needle valve is provided in the second movable chamber (4) at the fourth channel (17).

4. The fuel-resistant hydraulic module stack as claimed in claim 3, wherein a high-pressure fuel-resistant oil discharge hole (21) is formed in one side, away from the first oil inlet (13), of the first movable chamber (2) located inside the unloading valve body (1), and the top of the high-pressure fuel-resistant oil discharge hole (21) is connected with the second movable chamber (4) in a penetrating manner through a third channel (22).

5. The fuel-resistant hydraulic module stack according to claim 4, wherein an oil drain port (23) is formed in the cup-shaped slide valve (11) in the first movable chamber (2) and in a penetrating manner on one side close to the high-pressure fuel-resistant oil drain hole (21), and the oil drain port (23) is connected with the high-pressure fuel-resistant oil drain hole (21) in a penetrating manner.

6. A fuel-resistant hydraulic module stack according to claim 1, characterized in that the cup-shaped slide valve (11) is slidingly located inside the first movable chamber (2), the outer wall of the cup-shaped slide valve (11) being in contact with the inner wall of the first movable chamber (2).

7. An anti-fuel hydraulic module set according to claim 5, characterized in that a base block (24) is arranged below the oil drain port (23) on the inner wall of the first movable chamber (2), and the bottom of the cup-shaped slide valve (11) is connected with the top of the base block (24).

8. The fuel-resistant hydraulic module set according to claim 1, wherein a valve core is arranged inside the cup-shaped slide valve (11), the top of the valve core is connected with the top of the first movable chamber (2), a spring is sleeved on the outer wall of the bottom of the valve core, and the bottom of the spring is connected with the inner wall of the cup-shaped slide valve (11).

9. A fuel-resistant hydraulic module stack according to claim 1, characterized in that the high-pressure fuel-resistant inlet (25) is connected to an external high-pressure oil line.