CN211081991U - Hydraulic actuating mechanism with pressure sensor - Google Patents
Hydraulic actuating mechanism with pressure sensor Download PDFInfo
- Publication number
- CN211081991U CN211081991U CN201922415339.9U CN201922415339U CN211081991U CN 211081991 U CN211081991 U CN 211081991U CN 201922415339 U CN201922415339 U CN 201922415339U CN 211081991 U CN211081991 U CN 211081991U
- Authority
- CN
- China
- Prior art keywords
- oil
- pressure
- pressure transmitter
- hydraulic actuator
- valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Control Of Turbines (AREA)
Abstract
The utility model discloses a take pressure sensor's hydraulic actuator, including the oil circuit piece, the right side surface of oil circuit piece is equipped with the hydro-cylinder, and the right side surface of oil circuit piece is equipped with back oil pipe, pressure oil pipe and safe oil pipe by last under to in proper order, the front end of oil circuit piece is close to the bottom position and is equipped with pressure transmitter and No. two pressure transmitter, and No. two pressure transmitter are located a pressure transmitter's below. A take pressure sensor's hydraulic actuator, the staff can observe the change and the operational trend and the alarm information of two places pressure at any time in control system, in time discover the potential safety hazard to foresee the trouble of equipment in advance, for follow-up maintenance is prepared in advance, for the wisdom power plant builds at steam turbine speed governing system hydraulic actuator's model, the big data analysis in high in the clouds, equipment health state management expert remote fault diagnosis even provides the prerequisite.
Description
Technical Field
The utility model relates to a hydraulic actuator technical field, in particular to take pressure sensor's hydraulic actuator.
Background
The hydraulic actuating mechanism of the steam turbine speed regulating system is generally divided into a single-acting actuating mechanism and a double-acting actuating mechanism.
Traditional single-action hydraulic actuating mechanism mainly includes the hydro-cylinder, the oil circuit piece, and electricity-liquid converter, the off-load valve, the check valve, pressure measurement connects etc. and constitutes, and its theory of operation is: pressure oil enters the oil path block through the pressure oil pipe joint and is divided into two paths, wherein one path forms safety oil through a throttling hole, under the action of safety oil, the valve core of an unloading valve (a hydraulic valve with a flow rate larger than that of the electro-hydraulic converter) is closed, so that a channel between the lower part of a piston of an oil cylinder and return oil is blocked, the other path of pressure oil enters a pressure port of the electro-hydraulic converter after passing through a filter, when the electro-hydraulic converter receives a large opening command from the control system, the lower cavity of the piston of the oil cylinder (also called as the working cavity of the oil cylinder) is communicated with pressure oil of the electro-hydraulic converter, the piston retracts upwards, thereby lifting the opening degree of the valve at the lower part, when the electro-hydraulic converter receives a reduction command from the control system, the lower cavity of the piston of the oil cylinder is communicated with the return oil of the electro-hydraulic converter, and the piston extends out under the action of the spring force, so that the opening degree of the lower valve is reduced.
In the existing hydraulic actuating mechanism of the steam turbine speed regulating system, a safety oil pressure measuring point and an oil cylinder working cavity pressure measuring point are arranged at the front end of an oil path block, but the method has the following defects:
firstly, the hydraulic actuating mechanism of the speed regulating valve of the steam turbine is usually positioned at a position with higher position and higher environment temperature (the temperature of the equipment body is 500 ℃, and the environment temperature is more than 100 ℃), the manual operation and measurement are inconvenient, and the potential safety hazard is large;
secondly, only when the equipment has problems, the staff can measure, under the condition, the equipment is often in an unsafe state, and related maintenance plans cannot be made in advance, so that the hydraulic actuating mechanism with the pressure sensor is provided.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a main aim at provides a take pressure sensor's hydraulic actuator can effectively solve the problem among the background art.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a take pressure sensor's hydraulic actuator, includes the oil circuit piece, the right side surface of oil circuit piece is equipped with the hydro-cylinder, and the right side surface of oil circuit piece is close to the hydro-cylinder edge and is equipped with back oil pipe, pressure oil pipe and safety oil pipe by last under to in proper order, the front end of oil circuit piece is close to the bottom position and is equipped with pressure transmitter and No. two pressure transmitter, and No. two pressure transmitter are located pressure transmitter's below.
Preferably, the front end of the oil circuit block is provided with an oil return one-way valve, a filter and a safety oil one-way valve which are sequentially arranged from top to bottom, and the outer surface of the left side of the oil circuit block is provided with an electro-hydraulic converter.
Preferably, a quick-closing electromagnetic valve is arranged on the outer surface of the left side of the oil circuit block and below the electro-hydraulic converter.
Preferably, a piston is arranged in the oil cylinder, the bottom end of the piston is connected with a piston rod, an operating seat spring is arranged on the outer surface of the piston rod, and the bottom end of the piston rod is connected with a valve.
Preferably, the left side of oil circuit piece is installed the unloading valve, No. two pressure transmitter, a pressure transmitter, hydro-cylinder and oil return check valve are connected with the unloading valve through the pipeline respectively.
Preferably, the front end of the oil cylinder, the filter and the oil return one-way valve are all connected with the electro-hydraulic converter through pipelines, and the pressure oil pipe and the first pressure transmitter are connected with the other end of the filter through pipelines respectively.
Preferably, the first pressure transmitter is connected with the safety oil one-way valve through a pipeline.
Preferably, the first pressure transmitter, the oil return one-way valve and the outlet of the safety oil one-way valve and the pressure oil pipe are connected with the quick-closing electromagnetic valve through pipelines.
Compared with the prior art, the utility model discloses following beneficial effect has:
the staff can observe the change and the operation trend and the alarm information of two places pressure at any time in control system, in time discover the potential safety hazard to foresee the trouble of equipment in advance, for follow-up maintenance makes preparation in advance, for the wisdom power plant builds at steam turbine speed control system hydraulic actuator's model, the big data analysis in high in the clouds, equipment health condition management or even expert's remote fault diagnosis provides the prerequisite.
Drawings
Fig. 1 is a schematic view of the overall structure of a hydraulic actuator with a pressure sensor according to the present invention;
FIG. 2 is a diagram of an enlarged view A in FIG. 1 of a hydraulic actuator with a pressure sensor according to the present invention;
FIG. 3 is a structural diagram of a conventional hydraulic actuator of a hydraulic actuator with a pressure sensor according to the present invention;
fig. 4 is an enlarged view of B in the diagram 3 of a hydraulic actuator with a pressure sensor according to the present invention;
fig. 5 is a schematic diagram of a hydraulic actuator with a pressure sensor according to the present invention without a quick-closing solenoid valve;
fig. 6 is a schematic diagram of the hydraulic actuator with a pressure sensor according to the present invention, which includes a fast-closing solenoid valve.
In the figure: 1. an oil circuit block; 2. an oil cylinder; 3. an oil return pipe; 4. a pressure oil pipe; 5. a safety oil pipe; 6. an oil return check valve; 7. a filter; 8. a safety oil check valve; 9. an electro-hydraulic converter; 10. quickly closing the electromagnetic valve; 11. a first pressure transmitter; 12. and a second pressure transmitter.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
In which like parts are designated by like reference numerals. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "bottom" and "top," "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.
Comparative example
Referring to fig. 3-4, the hydraulic actuator of the turbine governor system drives the turbine governor valve, and the steam flow through the valve is determined by controlling the opening of the governor valve, so as to control the rotation speed or power of the turbine. The hydraulic actuators of a turbine governor system are generally classified into a single-acting actuator and a double-acting actuator.
The typical single-acting hydraulic actuating mechanism mainly comprises an oil cylinder 2, an oil circuit block 1, an electro-hydraulic converter 9, an unloading valve, a one-way valve, a pressure measuring joint and the like. The working principle is as follows: pressure oil enters the oil path block 1 through a pressure oil pipe 4 joint and is divided into two paths, wherein one path forms safety oil through a throttling hole, and a valve core of an unloading valve (a hydraulic valve with larger flow rate than that of the electro-hydraulic converter 9) is closed under the action of the safety oil, so that a channel between the lower part of an oil cylinder piston and return oil is cut off; the other path of the pressure oil passes through the filter 7 and then enters a pressure port of the electro-hydraulic converter 9, when the electro-hydraulic converter 9 receives an opening instruction from the control system, a lower cavity of a piston of the oil cylinder (also called an oil cylinder working cavity) is communicated with the pressure oil of the electro-hydraulic converter 9, the piston retracts upwards, so that the opening degree of a valve at the lower part is lifted, when the electro-hydraulic converter 9 receives a reduction instruction from the control system, the lower cavity of the piston of the oil cylinder is communicated with the return oil of the electro-hydraulic converter 9, and the piston extends out under the action of spring force, so that the.
When the rotating speed of the steam turbine exceeds the safe operating speed due to some reason, the control system sends a command to unload the safe oil through the remote control port, the valve core of the unloading valve is opened, and the pressure oil in the lower cavity of the piston of the oil cylinder is quickly discharged through the unloading valve, so that the steam valve is quickly closed under the action of the spring to cut off the steam and protect the steam turbine.
The quick-closing electromagnetic valve 10 is installed on a hydraulic actuating mechanism, the function of the quick-closing electromagnetic valve is that the function of unloading safety oil in situ of the actuating mechanism is added on the function of unloading safety oil remotely, and when the quick-closing electromagnetic valve 10 is electrified, the safety oil on the unloading valve can be communicated with return oil through the quick-closing electromagnetic valve 10, so that the safety oil can be unloaded.
Referring to fig. 4, in this case, the values of the safety oil pressure measuring point joint and the cylinder working chamber pressure measuring point joint in the actuator are detected, which are two parameters which are important in the actuator. Because the pressure of the pressure oil is relatively stable, the pressure of the safety oil is relatively stable under normal conditions; the working position of the piston in the working cavity of the oil cylinder is different, and the pressure can be changed accordingly. In actual operation, the unloading valve may not be closed tightly due to too low safety oil pressure, resulting in pressure leakage of the cylinder working chamber, and thus pressure instability of the cylinder working chamber or position control instability of the piston, which may result in instability of control of the rotation speed or power of the steam turbine, and affect safety of operation of the steam turbine.
Referring to fig. 1-2, a hydraulic actuator with a pressure sensor comprises an oil circuit block 1, an oil cylinder 2 is arranged on the right outer surface of the oil circuit block 1, an oil return pipe 3, a pressure oil pipe 4 and a safety oil pipe 5 are sequentially arranged on the right outer surface of the oil circuit block 1, close to the edge of the oil cylinder 2, from top to bottom, the front end of the oil circuit block 1 is provided with a first pressure transmitter 11 and a second pressure transmitter 12, and the second pressure transmitter 12 is located below the first pressure transmitter 11.
Referring to fig. 1, the front end of the oil path block 1 is provided with an oil return one-way valve 6, a filter 7 and a safety oil one-way valve 8 from top to bottom in sequence, and the outer surface of the left side of the oil path block 1 is provided with an electro-hydraulic converter 9.
Referring to fig. 1, a quick-closing solenoid valve 10 is provided on the left outer surface of the oil circuit block 1 below the electrohydraulic converter 9.
Referring to fig. 1, a piston is arranged inside an oil cylinder 2, the bottom end of the piston is connected with a piston rod, an operating seat spring is arranged on the outer surface of the piston rod, and the bottom end of the piston rod is connected with a valve.
Referring to fig. 1, an unloading valve is installed on the left side of an oil path block 1, and a second pressure transmitter 12, a first pressure transmitter 11, an oil cylinder 2 and an oil return check valve 6 are respectively connected with the unloading valve through pipelines.
Referring to fig. 1, the front end of the oil cylinder 2, the filter 7 and the oil return one-way valve 6 are all connected with the electro-hydraulic converter 9 through pipelines, and the pressure oil pipe 4 and the first pressure transmitter 11 are connected with the other end of the filter 7 through a pipeline respectively.
Referring to fig. 1, a first pressure transmitter 11 is connected with the safety oil check valve 8 through a pipeline.
Referring to fig. 1, the first pressure transmitter 11, the return oil check valve 6, the outlet of the safety oil check valve 8 and the pressure oil pipe 4 are all connected with the quick-closing solenoid valve 10 through pipelines.
The safe oil pressure measuring point and the oil cylinder working cavity pressure measuring point in the hydraulic actuating mechanism of the steam turbine speed regulating system are replaced by a first pressure transmitter 11 and a second pressure transmitter 12, so that continuous monitoring in a steam turbine control system is realized.
The staff can observe the change and the operation trend and the alarm information of two places pressure at any time in the control system, discover potential safety hazards in time, predict the fault of equipment in advance and prepare in advance for follow-up maintenance. The method provides preconditions for model building, cloud big data analysis, equipment health condition management and even expert remote fault diagnosis of the intelligent power plant in the hydraulic actuating mechanism of the steam turbine speed regulating system.
The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. The utility model provides a take pressure sensor's hydraulic actuator, includes oil circuit piece (1), the right side surface of oil circuit piece (1) is equipped with hydro-cylinder (2), and the right side surface of oil circuit piece (1) is close to hydro-cylinder (2) edge by last oil return pipe (3), pressure oil pipe (4) and safety oil pipe (5) of being equipped with in proper order down, its characterized in that: the front end of oil circuit piece (1) is close to bottom position and is equipped with pressure transmitter (11) and No. two pressure transmitter (12), and No. two pressure transmitter (12) are located the below of pressure transmitter (11).
2. The hydraulic actuator with a pressure sensor according to claim 1, wherein: the front end of oil circuit piece (1) has by last oil return check valve (6), filter (7) and safe oily check valve (8) of setting gradually down, the left side surface of oil circuit piece (1) is equipped with electric hydraulic converter (9).
3. The hydraulic actuator with a pressure sensor according to claim 2, wherein: and a quick-closing electromagnetic valve (10) is arranged on the outer surface of the left side of the oil circuit block (1) and below the electro-hydraulic converter (9).
4. The hydraulic actuator with a pressure sensor according to claim 1, wherein: the piston is arranged in the oil cylinder (2), the bottom end of the piston is connected with a piston rod, an operating seat spring is arranged on the outer surface of the piston rod, and the bottom end of the piston rod is connected with a valve.
5. The hydraulic actuator with a pressure sensor according to claim 1, wherein: an unloading valve is installed on the left side of the oil path block (1), and the second pressure transmitter (12), the first pressure transmitter (11), the oil cylinder (2) and the oil return one-way valve (6) are connected with the unloading valve through pipelines respectively.
6. The hydraulic actuator with a pressure sensor according to claim 2, wherein: the front end of the oil cylinder (2), the filter (7) and the oil return one-way valve (6) are connected with the electro-hydraulic converter (9) through pipelines, and the pressure oil pipe (4) and the pressure transmitter (11) are connected with the other end of the filter (7) through pipelines respectively.
7. The hydraulic actuator with a pressure sensor according to claim 2, wherein: the first pressure transmitter (11) is connected with the safety oil one-way valve (8) through a pipeline.
8. The hydraulic actuator with a pressure sensor according to claim 2, wherein: the outlet of the first pressure transmitter (11), the oil return one-way valve (6) and the safety oil one-way valve (8) and the pressure oil pipe (4) are connected with the quick-closing electromagnetic valve (10) through pipelines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922415339.9U CN211081991U (en) | 2019-12-27 | 2019-12-27 | Hydraulic actuating mechanism with pressure sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922415339.9U CN211081991U (en) | 2019-12-27 | 2019-12-27 | Hydraulic actuating mechanism with pressure sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211081991U true CN211081991U (en) | 2020-07-24 |
Family
ID=71640340
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922415339.9U Active CN211081991U (en) | 2019-12-27 | 2019-12-27 | Hydraulic actuating mechanism with pressure sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211081991U (en) |
-
2019
- 2019-12-27 CN CN201922415339.9U patent/CN211081991U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103148041B (en) | The controlling method of two electro-hydraulic servo valve control systems of the main passive load of a kind of energy-saving type | |
| WO2019104969A1 (en) | Fault diagnosis method and device for main distributing valve of hydraulic turbine governor, and storage medium | |
| CN102155573B (en) | Control device capable of ensuring safe operation of pneumatic valve | |
| CN105003715A (en) | Brake valve electro-hydraulic drive system with emergency shut valve function and brake valve | |
| CN101482190B (en) | Controlled security pressure relieving apparatus with pneumatic assisting apparatus | |
| CN103629421A (en) | Valve control system | |
| CN205330946U (en) | Compressor clearance tolerance governing system actuating mechanism's multiaction leak detection system | |
| US3495501A (en) | Valve operating and emergency closing mechanism | |
| CN109268347A (en) | A kind of generating set and its steam turbine interdiction early warning system | |
| CN211081991U (en) | Hydraulic actuating mechanism with pressure sensor | |
| CN204828870U (en) | Gate valve electricity liquid actuating system and gate valve with emergent valve function of closing | |
| CN203452856U (en) | Electro-hydraulic servo hydraulic actuator of turbine adjustment system | |
| CN105781957A (en) | Multifunctional leakage monitoring system of executing mechanisms of compressor and clearance air flow regulation system | |
| CN201954079U (en) | Control device for guaranteeing operation safety of pneumatic valve | |
| CN105387221A (en) | Flow controlling butterfly valve | |
| CN108662208B (en) | Hydraulic control valve with symmetrical structure | |
| CN103899829B (en) | A kind of double-action Pneumatic actuator with adjustment and failure safe function | |
| CN107740462A (en) | Hydraulic control system and there is its excavator | |
| CN103775052B (en) | Drilling tool wellhead safety protection control device | |
| CN203868006U (en) | Hydraulic automatic pressure relieving device | |
| CN209067589U (en) | A kind of generating set and its steam turbine interdiction early warning system | |
| CN111322451B (en) | Gas-liquid linkage actuating mechanism | |
| CN213953693U (en) | Lifting force self-balancing hydraulic actuator | |
| CN210370809U (en) | Quick-closing adjusting combined valve | |
| CN110181502A (en) | Hydraulic system and gripper for mechanical arm gripper |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |