CN212774436U - Pneumatic magnetic circuit-breaking throttle device for security of steam turbine compressor unit - Google Patents

Pneumatic magnetic circuit-breaking throttle device for security of steam turbine compressor unit Download PDF

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Publication number
CN212774436U
CN212774436U CN202021934953.2U CN202021934953U CN212774436U CN 212774436 U CN212774436 U CN 212774436U CN 202021934953 U CN202021934953 U CN 202021934953U CN 212774436 U CN212774436 U CN 212774436U
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pneumatic
valve
rack
throttle
compressor unit
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周振东
连历
史镜海
乔江
鞠毅
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704th Research Institute of CSIC
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704th Research Institute of CSIC
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D21/00—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for
    • F01D21/14—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for responsive to other specific conditions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
    • F01D15/08—Adaptations for driving, or combinations with, pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D17/00—Regulating or controlling by varying flow
    • F01D17/20—Devices dealing with sensing elements or final actuators or transmitting means between them, e.g. power-assisted
    • F01D17/22—Devices dealing with sensing elements or final actuators or transmitting means between them, e.g. power-assisted the operation or power assistance being predominantly non-mechanical
    • F01D17/26—Devices dealing with sensing elements or final actuators or transmitting means between them, e.g. power-assisted the operation or power assistance being predominantly non-mechanical fluid, e.g. hydraulic

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Turbines (AREA)

Abstract

本实用新型涉及一种汽轮压气机组安保用气动磁力断路油门装置，气动断路油门的油门壳体上部装有中间支座，油门壳体内装有液压滑阀、气动活塞，中间支座内装有齿轮齿条传动机构，油门壳体的侧面安装空气安全阀，空气安全阀与气动活塞的上腔室或下腔室连通；中间支座上部安装电磁液压机构，电磁液压机构具有一个磁力执行油缸，磁力执行油缸内的活塞杆的上下腔室分别通过两位四通电磁阀连接压力油泵，活塞杆下端穿过齿轮齿条传动机构中的一侧齿条与气动活塞上端固定连接，该齿条通过齿轮与齿轮齿条传动机构另一侧的齿条联动连接，另一侧齿条与液压滑阀的上端固定连接，液压滑阀的内腔连接动力油进口，外腔连接动力油出口，液压滑阀的内腔下面设有回油口。

Figure 202021934953

The utility model relates to a pneumatic magnetic circuit breaker throttle device for the security of a steam turbine compressor unit. The upper part of the throttle casing of the pneumatic circuit breaker is provided with an intermediate support, a hydraulic slide valve and a pneumatic piston are arranged in the throttle casing, and a gear is arranged in the intermediate support Rack transmission mechanism, an air safety valve is installed on the side of the throttle housing, and the air safety valve communicates with the upper chamber or the lower chamber of the pneumatic piston; an electromagnetic hydraulic mechanism is installed on the upper part of the intermediate support, and the electromagnetic hydraulic mechanism has a magnetic actuator cylinder. The upper and lower chambers of the piston rod in the actuator cylinder are respectively connected to the pressure oil pump through a two-position four-way solenoid valve. It is linked with the rack on the other side of the rack and pinion transmission mechanism, and the rack on the other side is fixedly connected with the upper end of the hydraulic slide valve. The inner cavity of the hydraulic slide valve is connected to the power oil inlet, the outer cavity is connected to the power oil outlet, and the hydraulic slide valve is connected. There is an oil return port under the inner cavity.

Figure 202021934953

Description

Pneumatic magnetic circuit-breaking throttle device for security of steam turbine compressor unit
Technical Field
The utility model relates to a turbo compressor unit security, especially an accelerator device for turbo compressor.
Background
The press machine needs to be provided with an exhaust pressure high (back pressure) protection shutdown function, generally overpressure power-off fast-closing protection. There are two forms of overvoltage power-off fast-closing protection: one is to measure the pressure of the exhaust port through a sensor, judge through a controller, and cut off the power supply of the prime motor when the pressure exceeds a set pressure, so as to realize the shutdown; the other is to cut off the power supply of the prime motor to realize the stop through a pressure relay when the pressure exceeds the set pressure. However, the conventional exhaust pressure high-protection shutdown technology is based on the functions of electrical elements and equipment, and the reliability of protection action needs to be ensured by depending on the reliability of the electrical elements and the electrical equipment.
Therefore, the utility model discloses a "pneumatic throttle that opens circuit" device realizes compressor backpressure protection through pure hydraulic pressure, pneumatics, mechanical transmission principle. The structural composition principle of the device is shown in figure 1.
When the exhaust pressure of the compressor exceeds the rated pressure to a certain overpressure limit value for some reason, the compressed air from the exhaust port enters a chamber above a pneumatic open-circuit throttle piston, the piston rapidly overcomes the spring force to move downwards, then a gear and a rack drive a slide valve to move downwards, so that high-pressure oil leading to a main throttle is cut off, the main throttle of the steam turbine is closed to stop emergently, and high-pressure oil below the slide valve flows into an oil tank from an oil return port below the slide valve.
The pneumatic circuit-breaking accelerator device overcomes the defects of a conventional overvoltage circuit-breaking quick-closing protection device, improves the reliability of back pressure protection of a compressor set, but has the potential danger of easy mechanical jamming and failure and the defect that two sets of devices occupy more size and space. Therefore, a new pneumatic magnetic cut-off throttle device is needed.
Disclosure of Invention
The utility model discloses the technical problem that will solve is: the pneumatic magnetic circuit-breaking accelerator device for the security of the steam turbine compressor unit with the integrated structure is provided, so that the exhaust overpressure protection shutdown function without depending on the reliability of electrical equipment can be realized, and the conventional overpressure power-off quick-closing protection shutdown function is retained; meanwhile, the hidden danger of mechanical jamming and failure of the pneumatic open-circuit accelerator device is eliminated, and the two devices are organically integrated to reduce the occupied space.
In order to achieve the above purpose, the technical scheme of the utility model is that: a pneumatic magnetic power open-circuit accelerator device for security of a turbo compressor set is provided with a pneumatic open-circuit accelerator, wherein a middle support is arranged at the upper part of an accelerator shell of the pneumatic open-circuit accelerator, a hydraulic slide valve and a pneumatic piston are arranged in the accelerator shell, a gear rack transmission mechanism is arranged in the middle support, an air safety valve is arranged on the side surface of the accelerator shell, and the air safety valve is communicated with an upper cavity or a lower cavity of the pneumatic piston; the utility model discloses a hydraulic drive mechanism, including middle support, electromagnetism hydraulic pressure mechanism, hydraulic pressure cylinder, the upper and lower chamber of piston rod in the hydraulic pressure cylinder is connected the pressure oil pump through two four-way solenoid valves respectively, the piston rod lower extreme passes one side rack and pneumatic piston upper end fixed connection among the rack and pinion drive mechanism, and this rack passes through the rack linkage of gear and rack and pinion drive mechanism opposite side and is connected, the rack of opposite side and the upper end fixed connection of hydraulic pressure slide valve, the power oil import is connected to the inner chamber.
Further, the air safety valve is connected with an exhaust port of an air compressor of the steam turbine screw compressor unit and is provided with an overpressure exhaust port; the power oil inlet is connected with a high-pressure oil outlet of a turbine screw compressor unit; the power oil outlet is connected with a high-pressure oil inlet of a main throttle valve of the steam turbine screw compressor unit; the oil return port is connected with an oil tank of the turbine screw compressor unit.
Further, when the exhaust pressure of the compressor exceeds the rated pressure, the air safety valve is opened, compressed air led from an exhaust port enters an upper chamber of a pneumatic piston of the pneumatic open-circuit throttle through a pipeline, the pneumatic piston rapidly overcomes the spring force to move downwards, then a gear and a rack drive a hydraulic sliding valve to move downwards, so that high-pressure oil led to a main throttle is cut off, the main throttle of the steam turbine is closed, the emergency stop is carried out, and high-pressure oil below the sliding valve flows into an oil tank from an oil return port below the sliding valve.
Further, when the exhaust pressure of the air compressor rises to an overpressure limit value, a two-position four-way electromagnetic valve in the electromagnetic hydraulic mechanism obtains an electric signal to trigger the electromagnetic hydraulic mechanism to act, the piston rod pushes the pneumatic piston downwards to move, and then the hydraulic sliding valve is driven by the gear and the rack to move downwards, so that high-pressure oil to the main valve is cut off, and the main valve of the steam turbine is closed to stop emergently.
When the two-position four-way electromagnetic valve receives an electric signal of remote control speed closing, the two-position four-way electromagnetic valve enables pressure oil inlet and oil return of the magnetic force execution oil cylinder to be reversed through the hydraulic block, and a piston rod in the magnetic force execution oil cylinder drives a rack arranged on a piston of a pneumatic open-circuit throttle air cavity, so that the pneumatic open-circuit throttle acts, and a main throttle of the steam turbine is closed to stop emergently.
The utility model has the advantages that:
the utility model discloses a pneumatic magnetic force accelerator device that opens circuit "compares original" superpressure outage fast turn-off protection "or" pneumatic accelerator that opens circuit ", has following characteristics:
1) the backpressure protection of the gas compressor can be realized by pure hydraulic, pneumatic and mechanical transmission principles, so that the problems of backpressure protection function failure caused by the reliability problem of electrical elements and backpressure protection function failure caused by power failure are avoided;
2) the back pressure 'overpressure power-off quick-closing protection' of the gas compressor can be realized;
3) remote control (according to other protection signals or manual judgment) electric quick-closing protection can be realized;
4) the hydraulic mechanism piston can be electrically operated periodically or before starting up, so as to prevent the original pneumatic open-circuit accelerator from being immovable due to the blockage of a 'pneumatic slide valve' of the pneumatic open-circuit accelerator.
Drawings
FIG. 1 is a cross-sectional view of a pneumatic cut-off throttle device;
FIG. 2 is a cross-sectional view taken along A-A of FIG. 1;
FIG. 3 is a sectional view of the pneumatic magnetic cut-off throttle device of the present invention;
FIG. 4 is a cross-sectional view taken along A-A of FIG. 3;
FIG. 5 is a cross-sectional rotated view taken along B-B in FIG. 4;
FIG. 6 is a schematic diagram of the pneumatic magnetic cut-off throttle device according to the present invention;
fig. 7 is an application schematic diagram of the pneumatic magnetic open-circuit accelerator device of the present invention on a turbo-screw compressor unit.
In the figure, the device comprises an air safety valve 1, an air safety valve 2, a pneumatic cut-off accelerator 3, an electromagnetic hydraulic mechanism 4, a cover 2-1, an accelerator shell 2-2, a gear rack transmission mechanism 2-3, a hydraulic slide valve 2-4, a pneumatic piston 2-5, a middle support 3-1, a two-position four-way electromagnetic valve 3-2, an oil cylinder 3-3, a piston rod 10 and a pneumatic magnetic cut-off accelerator device.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings and examples.
As shown in fig. 3 to 7, a pneumatic magnetic cut-off accelerator apparatus 10 is composed of three major parts, namely an air safety valve 1, a pneumatic cut-off accelerator 2 and an electromagnetic hydraulic mechanism 3. The pneumatic power-off accelerator 2 comprises an accelerator shell 2-1, a gear rack transmission mechanism 2-2, a hydraulic slide valve 2-3, a pneumatic piston 2-4, an intermediate support 2-5 and the like. The upper part of the accelerator shell 2-1 is provided with a middle support 2-5, the inside of the accelerator shell 2-1 is provided with a hydraulic slide valve 2-3 and a pneumatic piston 2-4, and the inside of the middle support 2-5 is provided with a gear rack transmission mechanism 2-2. The air safety valve 1 is integrally installed on the side surface of an accelerator shell 2-1 of the pneumatic power-off accelerator 2 and is communicated with an upper chamber or a lower chamber of a pneumatic piston 2-4. The electromagnetic hydraulic mechanism 3 consists of a two-position four-way electromagnetic valve 3-1, an oil cylinder 3-2 and a piston rod 3-3. The electromagnetic hydraulic mechanism 3 is arranged on the middle support 2-5, the upper and lower chambers of the piston rod 3-3 in the oil cylinder 3-2 are respectively connected with a pressure oil pump through a two-position four-way electromagnetic valve 3-1, the lower end of the piston rod 3-3 extends into a rack hole on the pneumatic piston 2-4 of the pneumatic open-circuit accelerator and then is in fit connection with a rack on one side of the rack-and-pinion transmission mechanism 2-2, the rack is connected with a rack on the other side of the rack-and-pinion transmission mechanism 2-2 through a gear, and a rack on the other side is connected with a slide bar of the hydraulic slide valve. The inner cavity of the hydraulic slide valve 2-3 is connected with a power oil inlet P, and the outer cavity is connected with a power oil outlet S. An oil return port Q is arranged below the inner cavity of the hydraulic slide valve 2-3.
The air safety valve is connected with an air outlet R of an air compressor of the steam turbine screw compressor unit; the air safety valve is also provided with an overpressure exhaust port W; the power oil inlet is connected with a high-pressure oil outlet of the steam turbine screw compressor unit; the power oil outlet is connected with a high-pressure oil inlet of a main valve of the steam turbine screw compressor unit; the oil return port is connected with an oil tank of the turbine screw compressor unit.
When the exhaust pressure of the compressor exceeds the rated pressure to a certain overpressure limit value for some reason, the air safety valve is opened, the compressed air introduced from the exhaust port enters an upper chamber of a pneumatic open-circuit throttle 'pneumatic piston' through a pipeline, the pneumatic piston rapidly overcomes the spring force to move downwards, and then a sliding valve is driven by a gear and a rack to move downwards, so that high-pressure oil leading to a main throttle is cut off and the main throttle of the steam turbine is closed to stop emergently, and high-pressure oil below the sliding valve flows into an oil tank from an oil return port below the sliding valve.
When the exhaust pressure of the compressor rises to a certain overpressure limit value, an electric signal is obtained to enable the electromagnetic hydraulic mechanism to trigger action, the piston rod pushes the 'pneumatic piston' downwards to move downwards, and then the gear and the rack drive the slide valve to move downwards, so that high-pressure oil leading to the main throttle valve is cut off, and the main throttle valve of the steam turbine is closed to stop emergently.
When the two-position four-way electromagnetic valve receives an electric signal (switching value trigger) of remote control speed closing, the pressure oil inlet and the return oil of the magnetic force execution oil cylinder are reversed through the hydraulic block, a piston rod in the magnetic force execution oil cylinder drives a rack arranged on a piston of a pneumatic open-circuit throttle air cavity through a guide device, the pneumatic open-circuit throttle is made to act, and a main throttle valve of the steam turbine is closed to stop emergently.
The pneumatic magnetic open-circuit accelerator can respectively realize the back pressure protection function of a gas compressor of the pneumatic open-circuit accelerator device and the execution function of remote control quick closing without mutual influence. And the piston of the hydraulic mechanism can be electrically operated periodically or before starting up, so as to prevent the original pneumatic open-circuit accelerator from being immovable due to the blockage of a 'pneumatic slide valve' of the pneumatic open-circuit accelerator.

Claims (5)

1.一种汽轮压气机组安保用气动磁力断路油门装置，具有一个气动断路油门，所述气动断路油门的油门壳体上部装有中间支座，油门壳体内装有液压滑阀、气动活塞，中间支座内装有齿轮齿条传动机构，其特征在于：所述油门壳体的侧面安装空气安全阀，所述空气安全阀与气动活塞的上腔室或下腔室连通；所述中间支座上部安装电磁液压机构，所述电磁液压机构具有一个磁力执行油缸，所述磁力执行油缸内的活塞杆的上、下腔室分别通过两位四通电磁阀连接压力油泵，所述活塞杆下端穿过齿轮齿条传动机构中的一侧齿条与气动活塞上端固定连接，该齿条通过齿轮与齿轮齿条传动机构另一侧的齿条联动连接，另一侧的齿条与液压滑阀的上端固定连接，所述液压滑阀的内腔连接动力油进口，外腔连接动力油出口，所述液压滑阀的内腔下面设有回油口。1. A pneumatic magnetic circuit breaker throttle device for the security of a steam turbine compressor unit, comprising a pneumatic circuit breaker throttle, the upper part of the throttle shell of the pneumatic circuit breaker throttle is equipped with an intermediate support, and the throttle shell is equipped with a hydraulic slide valve and a pneumatic piston, A rack and pinion transmission mechanism is installed in the intermediate support, which is characterized in that: an air safety valve is installed on the side of the throttle housing, and the air safety valve is communicated with the upper chamber or the lower chamber of the pneumatic piston; the intermediate support An electromagnetic hydraulic mechanism is installed on the upper part, and the electromagnetic hydraulic mechanism has a magnetic force actuating oil cylinder. The upper and lower chambers of the piston rod in the magnetic force actuating oil cylinder are respectively connected to the pressure oil pump through a two-position four-way electromagnetic valve. The rack on one side of the rack and pinion transmission mechanism is fixedly connected to the upper end of the pneumatic piston, the rack is linked with the rack on the other side of the rack and pinion transmission mechanism through the gear, and the rack on the other side is connected with the hydraulic slide valve. The upper end is fixedly connected, the inner cavity of the hydraulic slide valve is connected to the power oil inlet, the outer cavity is connected to the power oil outlet, and an oil return port is provided under the inner cavity of the hydraulic slide valve. 2.根据权利要求1所述的汽轮压气机组安保用气动磁力断路油门装置，其特征在于：所述空气安全阀连接汽轮螺杆压气机组的压气机的排气口，并设有超压排气口；所述动力油进口连接汽轮螺杆压气机组的高压油出口；所述动力油出口连接汽轮螺杆压气机组的主汽门的高压油进口；所述回油口连接汽轮螺杆压气机组的油箱。2. The pneumatic magnetic circuit breaker throttle device for security of a steam turbine compressor unit according to claim 1, is characterized in that: the air safety valve is connected to the air outlet of the compressor of the steam turbine screw compressor unit, and is provided with an overpressure discharge Air port; the power oil inlet is connected to the high pressure oil outlet of the turbine screw compressor unit; the power oil outlet is connected to the high pressure oil inlet of the main valve of the turbine screw compressor unit; the oil return port is connected to the turbine screw compressor unit 's fuel tank. 3.根据权利要求2所述的汽轮压气机组安保用气动磁力断路油门装置，其特征在于：当压气机排气压力超过额定压力时，所述空气安全阀开启，从排气口引来的压缩空气通过管路进入气动断路油门的气动活塞的上腔室，使所述气动活塞迅速克服弹簧力向下移动，再通过齿轮和齿条带动液压滑阀向下移动，从而切断通往主汽门的高压油并关闭汽轮机主汽门紧急停车，滑阀下面的高压油则从底下的回油口流入油箱。3. The pneumatic magnetic circuit breaker throttle device for security of a steam turbine compressor unit according to claim 2, is characterized in that: when the exhaust pressure of the compressor exceeds the rated pressure, the air safety valve is opened, and the air safety valve that is drawn from the exhaust port is opened. The compressed air enters the upper chamber of the pneumatic piston of the pneumatic cut-off throttle through the pipeline, so that the pneumatic piston quickly overcomes the spring force to move downward, and then drives the hydraulic slide valve to move downward through the gear and rack, thereby cutting off the flow to the main steam valve. The high-pressure oil of the valve is closed and the main valve of the steam turbine is closed for emergency stop, and the high-pressure oil under the slide valve flows into the oil tank from the oil return port at the bottom. 4.根据权利要求2所述的汽轮压气机组安保用气动磁力断路油门装置，其特征在于：当压气机排气压力升至超压限定值时，所述电磁液压机构中的两位四通电磁阀得到电信号，触发电磁液压机构动作，所述活塞杆往下推动气动活塞向下移动，再通过齿轮和齿条带动液压滑阀向下移动，从而切断通往主汽门的高压油并关闭汽轮机主汽门紧急停车。4. The pneumatic magnetic circuit breaker throttle device for security of a steam turbine compressor unit according to claim 2, is characterized in that: when the exhaust pressure of the compressor rises to the overpressure limit value, the two-position four-way in the electromagnetic hydraulic mechanism The solenoid valve receives an electrical signal, which triggers the action of the electromagnetic hydraulic mechanism. The piston rod pushes the pneumatic piston downward, and then drives the hydraulic slide valve to move downward through the gear and rack, thereby cutting off the high-pressure oil leading to the main valve. Close the steam turbine main valve for emergency stop. 5.根据权利要求2所述的汽轮压气机组安保用气动磁力断路油门装置，其特征在于：当两位四通电磁阀接收到遥控速关的电信号时，所述两位四通电磁阀通过液压块使磁力执行油缸的压力进油与回油换向，所述磁力执行油缸内的活塞杆驱动配置在气动断路油门气腔活塞上面的齿条，使气动断路油门动作，关闭汽轮机主汽门紧急停车。5. The pneumatic magnetic circuit breaker throttle device for security of a steam turbine compressor unit according to claim 2, is characterized in that: when the two-position four-way solenoid valve receives the electric signal of the remote control speed closing, the two-position four-way solenoid valve The pressure of the magnetic actuator cylinder is reversed through the hydraulic block, and the piston rod in the magnetic actuator cylinder drives the rack arranged on the air chamber piston of the pneumatic circuit breaker, so that the pneumatic circuit breaker throttle is actuated and the main steam of the turbine is closed. Door emergency stop.
CN202021934953.2U 2020-08-13 2020-09-07 Pneumatic magnetic circuit-breaking throttle device for security of steam turbine compressor unit Active CN212774436U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111963259A (en) * 2020-08-13 2020-11-20 中国船舶重工集团公司第七0四研究所 Pneumatic Magnetic Circuit Breaker Throttle Device for Turbo Compressor Unit Security

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Publication number Priority date Publication date Assignee Title
FR1369514A (en) * 1963-07-03 1964-08-14 Soc Es Energie Sa Improvements made to progressive control valve systems, in particular those for gas turbine installations
CN103574145A (en) * 2012-07-25 2014-02-12 姜堰市通达船用阀泵有限公司 Manual emergency butterfly valve driving device in gear and rack transmission
CN104879175B (en) * 2015-06-02 2016-04-27 济南达能动力技术有限责任公司 A kind of start up system of steam-operating oil pump and method
CN108104883B (en) * 2017-12-13 2020-05-05 中国船舶重工集团公司第七0四研究所 Small-sized hydraulic security device
CN111963259B (en) * 2020-08-13 2025-07-22 中国船舶重工集团公司第七0四研究所 Pneumatic magnetic power open-circuit accelerator device for security of turbo-compressor unit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111963259A (en) * 2020-08-13 2020-11-20 中国船舶重工集团公司第七0四研究所 Pneumatic Magnetic Circuit Breaker Throttle Device for Turbo Compressor Unit Security
CN111963259B (en) * 2020-08-13 2025-07-22 中国船舶重工集团公司第七0四研究所 Pneumatic magnetic power open-circuit accelerator device for security of turbo-compressor unit

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