CN218669477U - Oil control tripping valve assembly for reheating main throttle valve - Google Patents
Oil control tripping valve assembly for reheating main throttle valve Download PDFInfo
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- CN218669477U CN218669477U CN202222994465.6U CN202222994465U CN218669477U CN 218669477 U CN218669477 U CN 218669477U CN 202222994465 U CN202222994465 U CN 202222994465U CN 218669477 U CN218669477 U CN 218669477U
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Abstract
The utility model provides an oil accuse trip valve subassembly for reheat main valve belongs to steam turbine technical field, the utility model discloses a solve the unable problem that carries out the independent control of oil return of current oil accuse trip valve. It includes: a butterfly valve is arranged on a steam pipeline of a reheating main valve of the steam turbine, a control valve of an oil control tripping valve controls the opening and closing of the butterfly valve, an oil inlet of a servomotor working cavity of the oil control tripping gate valve is communicated with a high-pressure oil pipeline through an oil inlet and return electromagnetic valve control block, an oil return port of the servomotor working cavity of the oil control tripping gate valve is communicated with a non-pressure oil return pipeline through an oil inlet and return electromagnetic valve control block, and a non-pressure oil return port of the servomotor working cavity of the oil control tripping gate valve is communicated with a lower cavity oil way; the non-pressure oil return pipeline and the lower cavity oil way are respectively connected to two joints of the three-way joint, and the third joint of the three-way joint is connected to the oil tank. The utility model is used for control closing of steam turbine reheat main valve.
Description
Technical Field
The utility model relates to a novel oil accuse trip valve subassembly belongs to steam turbine technical field.
Background
The closer the unit is started from the hanging gate to a normal operation state, the tighter the metal seal is, but when tripping and stopping occur, the compaction acting force of the steam hinders the closing of the middle main door. For this purpose, an oil-pressure-actuated shut-off pilot valve, i.e. an oil-controlled tripping valve, is provided for relieving the unbalanced steam force acting on the inner end face of the shaft when the main reheat steam valve is closed, which valve is connected to the drain expansion vessel of the condenser and discharges the steam to the drain expansion vessel.
The reheating main valve of the existing steam turbine is a rocker type non-return butterfly valve, bypass devices are arranged on two sides of the butterfly valve, and an oil control tripping gate valve is connected with the bypass devices, so that steam pressure on two sides of the valve butterfly is evenly distributed, and the shaft end pressure in the closing process of the reheating main valve is reduced. However, the oil control tripping valve has the following problems: the oil inlet of the oil control skip gate valve is from the oil inlet of a reheating main gasoline valve oil engine, and the return oil is connected with an EH non-pressure return oil main pipe after a throttling hole behind the stop valve, so that the oil inlet and return can not be controlled independently, and certain limitation exists.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the purpose is in order to solve the unable problem of carrying out the independent control of oil return of current oil accuse trip valve, provides an oil accuse trip valve subassembly that is used for reheat main valve.
A oil accuse trip valve subassembly for reheat main valve, it includes: the oil control tripping gate valve, the oil inlet and return electromagnetic valve control block and the three-way joint are arranged on the oil pipe;
the oil control tripping gate valve comprises a control valve and an oil-operated machine, and a piston rod of the oil-operated machine is linked with the control valve;
a butterfly valve is arranged on a steam pipeline of a reheating main valve of the steam turbine, a control valve of an oil control trip valve controls the opening and closing of the butterfly valve, an oil inlet of an oil servomotor working cavity of the oil control trip valve is communicated with a high-pressure oil pipeline through an oil inlet and return electromagnetic valve control block, an oil return port of the oil servomotor working cavity of the oil control trip valve is communicated with a non-pressure oil return pipeline through the oil inlet and return electromagnetic valve control block, and the non-pressure oil return port of the oil servomotor working cavity of the oil control trip valve is communicated with a lower cavity oil way;
the non-pressure oil return pipeline and the lower cavity oil way are respectively connected to two joints of the three-way joint, and the third joint of the three-way joint is connected to the oil tank.
Preferably, when the reheating main throttle of the steam turbine is opened, the oil inlet and return electromagnetic valve control block loses power, and high-pressure oil is injected into a working cavity of the servomotor through a high-pressure oil pipeline;
when the reheating main valve of the steam turbine is closed, the oil inlet and return electromagnetic valve control block is electrified, and high-pressure oil in the working cavity of the servomotor is discharged to an oil tank through a non-pressure oil return pipeline.
Preferably, when high-pressure oil is injected into the working cavity of the servomotor through the high-pressure oil pipeline, the butterfly valve is controlled to be closed through the linked control valve, so that the shaft end of the valve rod of the reheating main throttle valve is in a sealing state;
when high-pressure oil in the working cavity of the servomotor is discharged, the butterfly valve is controlled to be opened through the linked control valve, so that the shaft end of the valve rod of the reheating main throttle valve is in an air leakage state.
The utility model has the advantages that: the utility model provides an oil accuse trip valve subassembly for reheat main valve can carry out solitary control respectively through the oil feed and the oil return of advancing oil return solenoid valve control block to oil accuse trip valve, can accelerate to let out the axle head pressure of reheat main valve rod, and then accelerate closing of reheat main valve, has improved the security of complete machine unit.
Drawings
Fig. 1 is a schematic structural view of an oil control trip valve assembly for a reheat main valve according to the present invention;
fig. 2 is a schematic structural diagram of the oil inlet and return solenoid valve control block of the present invention, wherein c represents an interface connected to a non-pressure oil return line;
fig. 3 is a view from a direction of fig. 2, in which a indicates a port connected to an oil inlet of a servomotor working chamber of the oil control trip valve, and b indicates a port communicating with a high-pressure oil line.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.
The present invention will be further described with reference to the accompanying drawings and specific embodiments, but the present invention is not limited thereto.
Example 1:
the present embodiment will be described with reference to fig. 1 to 3, and the oil control trip valve assembly for a reheat main valve according to the present embodiment includes: the oil control tripping gate valve, the oil inlet and return electromagnetic valve control block 2 and the three-way joint 5 are arranged;
the oil control tripping valve comprises a control valve 1-1 and an oil-operated machine 1-2, and a piston rod of the oil-operated machine 1-2 is linked with the control valve 1-1;
a butterfly valve 6 is arranged on a steam pipeline of a reheating main valve of the steam turbine, a control valve 1-1 of an oil control trip valve controls the opening and closing of the butterfly valve 6, an oil inlet of a work cavity of an oil servomotor 1-2 of the oil control trip valve is communicated with a high-pressure oil pipeline 3 through an oil inlet and return electromagnetic valve control block 2, an oil return port of the work cavity of the oil servomotor 1-2 of the oil control trip valve is communicated with a non-pressure oil return pipeline 4 through the oil inlet and return electromagnetic valve control block 2, and a non-pressure oil return port of the work cavity of the oil servomotor 1-2 of the oil control trip valve is communicated with a lower cavity oil way 7;
the non-pressure oil return pipeline 4 and the lower cavity oil way 7 are respectively connected to two joints of the three-way joint 5, and a third joint of the three-way joint 5 is connected to an oil tank.
Further, when the reheating main throttle of the steam turbine is opened, the oil inlet and return electromagnetic valve control block 2 loses power, and high-pressure oil is injected into a working cavity of the servomotor 1-2 through the high-pressure oil pipeline 3;
when the reheating main valve of the steam turbine is closed, the oil inlet and return electromagnetic valve control block 2 is electrified, and high-pressure oil in the working cavity of the servomotor 1-2 is discharged to an oil tank through the non-pressure oil return pipeline 4.
Further, when high-pressure oil is injected into a working cavity of the servomotor 1-2 through the high-pressure oil pipeline 3, the butterfly valve 6 is controlled to be closed through the linked control valve 1-1, and the shaft end 8 of the reheating main throttle valve rod is in a sealing state;
when high-pressure oil in the working cavity of the servomotor 1-2 is discharged, the butterfly valve 6 is controlled to be opened through the linked control valve 1-1, so that the shaft end 8 of the reheating main valve rod is in an air leakage state.
The utility model discloses in, as shown in fig. 2 and fig. 3, the oil inlet of the servomotor 1-2 working chamber of oil control jump gate valve communicates with high-pressure oil pipe way 3 through advancing oil return solenoid valve control block 2, the oil inlet of the servomotor 1-2 working chamber of oil control jump gate valve connects the a interface of advancing oil return solenoid valve control block 2, the b interface of advancing oil return solenoid valve control block 2 is connected to high-pressure oil pipe way 3, the oil return of the servomotor 1-2 working chamber of oil control jump gate valve communicates with non-pressure oil return pipeline 4 through advancing oil return solenoid valve control block 2, the c interface of advancing oil return solenoid valve control block 2 is connected to non-pressure oil return pipeline 4.
As shown in fig. 1, when a reheating main throttle of a steam turbine is opened, a control block 2 of an oil inlet and return electromagnetic valve loses power, high-pressure oil is injected into a working cavity of an oil servomotor 1-2 through a high-pressure oil pipeline 3, and a butterfly valve 6 is controlled to be closed through a linked control valve 1-1, so that a shaft end 8 of a valve rod of the reheating main throttle is in a sealing state; when the reheating main valve of the steam turbine is closed, the oil inlet and return electromagnetic valve control block 2 is electrified, high-pressure oil in the working cavity of the servomotor 1-2 is discharged to an oil tank through the non-pressure oil return pipeline 4, and the butterfly valve 6 is controlled to be opened through the linked control valve 1-1, so that the shaft end 8 of the valve rod of the reheating main valve is in an air leakage state.
Although the invention herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that various dependent claims and the features described herein may be combined in ways different from those described in the original claims. It is also to be understood that features described in connection with individual embodiments may be used in other described embodiments.
Claims (1)
1. An oil control trip valve assembly for a reheat main valve, comprising: the oil control jump gate valve, the oil inlet and return electromagnetic valve control block (2) and the three-way joint (5);
the oil control tripping gate valve comprises a control valve (1-1) and an oil-operated machine (1-2), and a piston rod of the oil-operated machine (1-2) is linked with the control valve (1-1);
a butterfly valve (6) is arranged on a steam pipeline of a reheating main valve of a steam turbine, a control valve (1-1) of an oil control trip valve controls the opening and closing of the butterfly valve (6), an oil inlet of a working cavity of an oil servomotor (1-2) of the oil control trip valve is communicated with a high-pressure oil pipeline (3) through an oil inlet and return electromagnetic valve control block (2), an oil return port of the working cavity of the oil servomotor (1-2) of the oil control trip valve is communicated with a non-pressure oil return pipeline (4) through the oil inlet and return electromagnetic valve control block (2), and a non-pressure oil return port of the working cavity of the oil servomotor (1-2) of the oil control trip valve is communicated with a lower cavity oil way (7);
the non-pressure oil return pipeline (4) and the lower cavity oil way (7) are respectively connected to two joints of the three-way joint (5), and a third joint of the three-way joint (5) is connected to an oil tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222994465.6U CN218669477U (en) | 2022-11-10 | 2022-11-10 | Oil control tripping valve assembly for reheating main throttle valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222994465.6U CN218669477U (en) | 2022-11-10 | 2022-11-10 | Oil control tripping valve assembly for reheating main throttle valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218669477U true CN218669477U (en) | 2023-03-21 |
Family
ID=85536810
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222994465.6U Active CN218669477U (en) | 2022-11-10 | 2022-11-10 | Oil control tripping valve assembly for reheating main throttle valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218669477U (en) |
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2022
- 2022-11-10 CN CN202222994465.6U patent/CN218669477U/en active Active
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