CN215445275U - Integrated execution device of steam valve - Google Patents
Integrated execution device of steam valve Download PDFInfo
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- CN215445275U CN215445275U CN202122238815.1U CN202122238815U CN215445275U CN 215445275 U CN215445275 U CN 215445275U CN 202122238815 U CN202122238815 U CN 202122238815U CN 215445275 U CN215445275 U CN 215445275U
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Abstract
The integrated execution device of the steam valve solves the problems that the existing execution device with a spring operation seat and an oil engine has a complex structure and is difficult to overhaul, and belongs to the technical field of steam valves. The hydraulic servo motor comprises a hydraulic servo motor, a disc spring and a connecting piece, wherein a piston and a connecting rod are arranged in an oil cylinder of the hydraulic servo motor, the piston is arranged on a lower end cover of the oil cylinder and fixedly connected with the connecting rod, the connecting rod is vertically arranged, and the bottom end of the connecting rod penetrates through the lower end cover; the bottom end of the connecting rod is connected with the valve through a connecting piece. The utility model combines the structure formed by the servomotor and the spring operating seat into an organic whole, thereby simplifying the structure.
Description
Technical Field
The utility model relates to an integrated execution device of a steam valve, and belongs to the technical field of steam valves.
Background
At present, a steam valve executing device used by a turbo generator unit below 200MW is mostly a hydraulic executing device with oil inlet at one side, and the steam valve executing device is characterized in that the steam valve executing device is opened by oil pressure and closed by spring force. Therefore, the actuating device consists of a spring operating seat and a servomotor, as shown in fig. 1 and 2, the structure is complex, and the two parts need to be respectively overhauled during daily maintenance.
Disclosure of Invention
The utility model provides an integrated execution device of a steam valve, aiming at the problems that the existing execution devices of a spring operation seat and a servomotor are complex in structure and difficult to overhaul.
The utility model discloses an integrated execution device of a steam valve, which comprises an oil engine, a disc spring 11 and a connecting piece, wherein a piston 23 and a connecting rod 24 are arranged in an oil cylinder of the oil engine, the piston 23 is arranged on a lower end cover 22 of the oil cylinder, the piston 23 is fixedly connected with the connecting rod 24, the connecting rod 24 is vertically arranged, and the bottom end of the connecting rod 24 penetrates through the lower end cover 22, and the integrated execution device is characterized in that the disc spring 11 is arranged in a non-working cavity of the oil cylinder of the oil engine and is sleeved on the connecting rod 24, the disc spring 11 is positioned above the piston 23, the bottom end of the disc spring 11 is fixedly connected with the piston 23, and the top end of the disc spring 11 is fixedly connected with an upper end cover 21 of the oil cylinder; the bottom end of the connecting rod 24 is connected with the valve through a connecting piece.
Preferably, the connecting member includes a connecting base 20, a connector 14 and a connecting sleeve 15;
the connecting base 20 is located below the lower end cover 22, one side of the connecting base 20 is fixedly connected with the bottom surface of the lower end cover 22, the other side of the connecting base 20 is connected with the valve to fix the oil engine and the valve together, the bottom end of the connecting rod 24 is connected with the connecting sleeve 15 through the connector 14, and the connecting sleeve 15 is used for connecting a valve rod of the valve.
Preferably, the connecting member further comprises a coupling half 19, and the bottom end of the connecting rod 24 is connected to the connector 14 through the coupling half 19.
Preferably, the automatic control valve further comprises a travel switch 13, the travel switch 13 is arranged on the servomotor, the travel switch is connected with a connecting rod 24 through a connecting rod and moves up and down along with the oil cylinder, and the connecting rod 24 is in contact with the travel switch to detect that the valve is in a full-open position or a full-closed position.
Preferably, the hydraulic control system further comprises an accumulator 18, and the accumulator 18 is communicated with the oil circuit connecting block 2 of the oil-powered machine.
The integrated actuating device has the beneficial effects that the structure of the spring operating seat is simplified, the auxiliary structures such as the shell, the graphite copper sleeve and the sliding frame are eliminated, and the disc spring is directly arranged in the oil cylinder of the oil-operated machine to realize the control of the steam valve. The utility model combines the structure formed by the servomotor and the spring operating seat into an organic whole, simplifies the structure, and only needs to overhaul the servomotor during overhaul. The control and safe and stable operation requirements of the unit can be met, and the advantages of compact structure and easiness in maintenance and repair are achieved, so that the product has excellent market competitiveness.
Drawings
Fig. 1 is a structural view of a conventional servomotor;
FIG. 2 is a structural view of a conventional console;
FIG. 3 is a schematic structural diagram of the integrated actuator of the present invention;
fig. 4 is an electrical schematic of the integrated actuator.
Detailed Description
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 only a part of the embodiments of the present invention, and not all of the embodiments. 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 the embodiments and features of the embodiments may be combined with each other without conflict.
The utility model is further described with reference to the following drawings and specific examples, which are not intended to be limiting.
As shown in fig. 1, the conventional oil-powered machine mainly includes: the oil way connecting block comprises an oil way connecting block 1, an oil cylinder 2, an electromagnetic valve 3, a screw-in pipe joint 4, a cartridge valve 5, a combination block 6, an integrated block 7, corresponding connecting screws, sealing elements and the like.
As shown in fig. 2, the conventional console structure includes: the upper end cover assembly 9, the shell 10, the disc spring 11, the sliding frame assembly 12, the travel switch 13, the connector 14, the connecting sleeve 15, the guide sleeve 16 and corresponding connecting bolts, adjusting gaskets, sealing elements and the like.
In the integrated execution device of the steam valve of the embodiment, the disc spring 11 of the operation seat structure and the connecting piece of the valve are placed in the servomotor, so that the function of the operation seat of the steam valve is realized. The integrated execution device of the steam valve comprises an oil engine, a disc spring 11 and a connecting piece, and is characterized in that a piston 23 and a connecting rod 24 are arranged in an oil cylinder of the oil engine, the piston 23 is arranged on a lower end cover 22 of the oil cylinder, the piston 23 is fixedly connected with the connecting rod 24, the connecting rod 24 is vertically arranged, the bottom end of the connecting rod 24 penetrates through the lower end cover 22, the disc spring 11 is arranged in a non-working cavity of the oil cylinder of the oil engine and is sleeved on the connecting rod 24, the disc spring 11 is positioned above the piston 23, the bottom end of the disc spring 11 is fixedly connected with the piston 23, and the top end of the disc spring 11 is fixedly connected with an upper end cover 21 of the oil cylinder; the bottom end of the connecting rod 24 is connected with the valve through a connecting piece.
In order to ensure the feasibility of the built-in disc spring 11, the diameter of the oil cylinder needs to be properly increased, and the working pressure of the system is adjusted from 14MPa to 10MPa on the premise that the total load of the valve is not changed. Along with the adjustment of working pressure, the selectivity of a hydraulic system medium is improved, phosphate fire-resistant oil can be selected, and wear-resistant oil or other oil products can be used.
As shown in fig. 3, it mainly includes: the oil way connecting block comprises an oil way connecting block 1, an oil cylinder 2, an electromagnetic valve 3, a control integrated block 17, an energy accumulator 18, a half coupling 19, a connecting seat 20, a connector 14, a connecting sleeve 15, a corresponding connecting bolt, an adjusting gasket, a sealing element and the like. During assembly, the housings are connected by bolts and spacers, and the valve and the integrated actuator are connected together by the connector 14 and the connecting sleeve 15. The integrated executing device has the same working principle with the prior executing device,
the connector of the present embodiment includes a connecting socket 20, a connector 14, and a connecting sleeve 15;
the connecting base 20 is located below the lower end cover 22, one side of the connecting base 20 is fixedly connected with the bottom surface of the lower end cover 22, the other side of the connecting base 20 is connected with the valve to fix the oil engine and the valve together, the bottom end of the connecting rod 24 is connected with the connecting sleeve 15 through the connector 14, and the connecting sleeve 15 is used for connecting a valve rod of the valve. The bottom end of the connecting rod 24 is connected to the connector 14 by means of a coupling half 19. The integrated execution device of the embodiment further comprises a travel switch 13, the travel switch 13 is arranged on the servomotor, the travel switch is connected with the connecting rod 24 through a connecting rod and moves up and down along with the oil cylinder, and the detection valve is in a full-open position or a full-closed position through the contact of the connecting rod 24 and the travel switch. And the energy accumulator 18, wherein the energy accumulator 18 is communicated with the oil circuit connecting block 2 of the servomotor.
As shown in figure 4, the servomotor receives the control signal from DEH control system, after the electromagnetic valve 3 receives the control signal, the power is lost and the electromagnetic valve is closed, the AST control oil in the upper cavity of the cartridge valve 5 is led to the closed path with return pressure oil, the slide valve of the cartridge valve 5 is closed under the action of the oil pressure of the AST oil in the upper cavity of the cartridge valve 5 and the spring, at the moment, the high-pressure fire-resistant oil enters the lower cavity of the cylinder of the servomotor and the unloading valve through the throttling hole through the pipe joint 4, and under the action of the oil pressure, the actuating device overcomes the acting force and the friction of the steam on the valve, the gravity of the valve and the spring force of the operating seat and opens the steam valve.
When the AST oil main pipe is decompressed when the steam turbine is in an emergency, the cartridge valve 5 is quickly opened under the action of pressure oil, the pressure oil in the lower cavity of the piston rod of the servomotor is quickly discharged, and the valve is quickly closed under the action of the disc spring 11.
The hydraulic servomotor is provided with a movable test electromagnetic valve 3, the movable electromagnetic valve 3 is closed in a power-off mode during normal operation, when the valve needs to perform a movable test according to the regulation of the operation rule of the thermal power steam turbine generator unit, an operator sends a main valve movable test instruction in a centralized control room, the main valve movable test electromagnetic valve 3 is powered on to be opened, the load pressure oil part in the lower cavity of the piston of the oil cylinder 2 of the hydraulic servomotor is discharged, the load oil pressure part in the lower cavity of the piston of the oil cylinder of the oil servomotor falls, and the valve is closed for a certain stroke under the action of the spring force of an operation seat. After the valve activity test is completed, the electromagnetic valve is powered off, a passage leading to the pressure oil return main pipe is closed, the load oil pressure under the oil cylinder piston of the main valve servomotor is recovered, and the valve servomotor returns to the full-open position.
The working principle of the hydraulic system of the embodiment is completely the same as that of the existing hydraulic actuator, the auxiliary structures such as the shell 9, the graphite copper sleeve, the sliding frame 12 and the like in the original operating seat are eliminated, the disc spring 11 is directly arranged in the non-working cavity of the oil cylinder of the oil-operated machine, the mechanism formed by the oil-operated machine and the spring operating seat is combined into an organic whole, high-pressure oil enters the working cavity of the oil cylinder when the valve is opened, the steam valve is opened by overcoming the acting force of steam on the valve, the friction force, the gravity of the valve and the spring force of the non-working cavity, the hydraulic oil in the oil cylinder is removed when the valve is closed, the spring force in the non-working cavity is released, and the valve is closed under the action of the spring force.
The integrated execution device of the embodiment is completely the same as the existing hydraulic execution device, so that the hydraulic control block can continue the product series of the existing unit, the modular design can be realized, and the integrated execution device has the characteristic of good universality. The actuator of the present embodiment maintains a fail-safe design, and its mechanical parameters are completely the same as those of the original mechanism. Meanwhile, the matching size and interface parameters of the valve are also kept unchanged. The performance, parameters, response speed and control precision of the method are improved on the basis of the original mechanism, and the reliability of the equipment is improved while the control requirement of the unit is met.
Although the utility model 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 features described in different dependent claims and 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 (5)
1. The integrated execution device of the steam valve comprises an oil engine, a disc spring (11) and a connecting piece, and is characterized in that a piston (23) and a connecting rod (24) are arranged in an oil cylinder of the oil engine, the piston (23) is arranged on a lower end cover (22) of the oil cylinder, the piston (23) is fixedly connected with the connecting rod (24), the connecting rod (24) is vertically arranged, and the bottom end of the connecting rod (24) penetrates through the lower end cover (22), and is characterized in that the disc spring (11) is arranged in a non-working cavity of the oil cylinder of the oil engine and sleeved on the connecting rod (24), the disc spring (11) is positioned above the piston (23), the bottom end of the disc spring (11) is fixedly connected with the piston (23), and the top end of the disc spring (11) is fixedly connected with an upper end cover (21) of the oil cylinder; the bottom end of the connecting rod (24) is connected with the valve through a connecting piece.
2. The integrated actuator according to claim 1, wherein the connector comprises a connecting socket (20), a connector (14) and a connecting sleeve (15);
the connecting seat (20) is located below the lower end cover (22), one side of the connecting seat (20) is fixedly connected with the bottom surface of the lower end cover (22), the other side of the connecting seat (20) is connected with the valve, the servomotor and the valve are fixed together, the bottom end of the connecting rod (24) is connected with the connecting sleeve (15) through the connector (14), and the connecting sleeve (15) is used for being connected with a valve rod of the valve.
3. The integrated actuator according to claim 2, wherein the connector further comprises a coupling half (19), and the bottom end of the connecting rod (24) is connected to the connector (14) via the coupling half (19).
4. The integrated actuator according to claim 3, further comprising a travel switch (13), wherein the travel switch (13) is arranged on the oil-operated machine, the travel switch is connected with the connecting rod (24) through a connecting rod and moves up and down along with the oil cylinder, and the connecting rod (24) is contacted with the travel switch to detect that the valve is in a full-open position or a full-closed position.
5. The integrated actuator according to claim 4, further comprising an accumulator (18), wherein the accumulator (18) is in communication with the oil connection block (2) of the servomotor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122238815.1U CN215445275U (en) | 2021-09-14 | 2021-09-14 | Integrated execution device of steam valve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122238815.1U CN215445275U (en) | 2021-09-14 | 2021-09-14 | Integrated execution device of steam valve |
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| CN215445275U true CN215445275U (en) | 2022-01-07 |
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| CN202122238815.1U Active CN215445275U (en) | 2021-09-14 | 2021-09-14 | Integrated execution device of steam valve |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114877117A (en) * | 2022-05-31 | 2022-08-09 | 哈尔滨汽轮机厂有限责任公司 | Steam valve electric actuator with fast closing function |
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2021
- 2021-09-14 CN CN202122238815.1U patent/CN215445275U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114877117A (en) * | 2022-05-31 | 2022-08-09 | 哈尔滨汽轮机厂有限责任公司 | Steam valve electric actuator with fast closing function |
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