CN213574892U - Hydraulic control butterfly valve oil cylinder pressure protection device - Google Patents
Hydraulic control butterfly valve oil cylinder pressure protection device Download PDFInfo
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- CN213574892U CN213574892U CN202021199258.6U CN202021199258U CN213574892U CN 213574892 U CN213574892 U CN 213574892U CN 202021199258 U CN202021199258 U CN 202021199258U CN 213574892 U CN213574892 U CN 213574892U
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Abstract
The utility model provides a hydraulic control butterfly valve hydro-cylinder pressure protection device, include: hydraulic control butterfly valve hydraulic control subsystem and hydraulic control butterfly valve pressure protection system, wherein hydraulic control butterfly valve pressure protection system includes first oil pressure protection solenoid valve, second oil pressure protection solenoid valve and steady voltage energy storage ware, first oil pressure protection solenoid valve installs additional in hydraulic control oil station switch side oil pipe opening through the pipeline, second oil pressure protection solenoid valve installs additional in hydraulic control oil station open side oil pipe opening through the pipeline in, first oil pressure protection solenoid valve, second oil pressure protection solenoid valve all are connected to steady voltage energy storage ware through the pipeline.
Description
Technical Field
The utility model relates to a safety protection technical field of thermal power factory is suitable for the application of coal-fired power generation enterprise liquid accuse butterfly valve hydraulic pressure station pneumatic cylinder, especially a liquid accuse butterfly valve hydro-cylinder pressure protection device.
Background
The large-pipe-diameter long-flow liquid conveying pressure pipeline is provided with a liquid control butterfly valve, has two functions of cutting off water flow and a check valve, effectively prevents large water hammer and pressure fluctuation caused by sudden power failure or accident pump stop, and protects a water pump and a system pipeline. The mechanical system of a conventional butterfly valve is composed of a driving mechanism, a flange, a butterfly plate (or a valve plate or a valve), a valve shaft, a shaft seal part and a valve shaft positioning part. The butterfly valve is usually an eccentric structure, namely, the center of a valve plate (valve shaft) lifts the center line of a pipeline for a certain distance, so that the water-facing area of the lower half part is larger than that of the upper half part in the valve closing process, the valve is assisted to be closed, and the heavy hammer is reduced. The hydraulic oil cylinder is used as a working oil cylinder in the opening process of the butterfly valve, and is used as a hydraulic brake in the closing process of the butterfly valve, and is used for controlling the quick closing time and the slow closing time and angle, all actions of the driving mechanism are controlled by the electric control box and the hydraulic control box, and the hydraulic oil cylinder and the hydraulic control box are in flexible connection through a high-pressure rubber pipe.
The pressure of an oil cylinder of a traditional hydraulic cylinder is consistent with the pressure of a system or the pressure of an outlet of a hydraulic pump (14-17 MPa), when the environmental temperature is increased, liquid is heated to expand, the pressure can be increased to 21MPa to the maximum, the pressure exceeds the design pressure of a pipeline, and the defects that the hydraulic cylinder, a sealing element and an oil pipe bear high pressure, the sealing element is aged, the oil pipe leaks and the like are caused frequently due to the lack of a pressure protection means, and great potential safety hazards exist.
SUMMERY OF THE UTILITY MODEL
In order to overcome the above-mentioned problem that prior art exists, the utility model aims to provide a hydraulic control butterfly valve hydro-cylinder pressure protection device has solved the problem that the thermal expansion superpressure caused equipment to damage under the pneumatic cylinder cavity pressure-bearing state through reforming transform.
An object of the utility model is to provide a hydraulic control butterfly valve hydro-cylinder pressure protection device, include: hydraulic control butterfly valve hydraulic control subsystem and hydraulic control butterfly valve pressure protection system, wherein hydraulic control butterfly valve pressure protection system includes first oil pressure protection solenoid valve, second oil pressure protection solenoid valve and steady voltage energy storage ware, first oil pressure protection solenoid valve installs additional in hydraulic control oil station switch side oil pipe opening through the pipeline, second oil pressure protection solenoid valve installs additional in hydraulic control oil station open side oil pipe opening through the pipeline in, first oil pressure protection solenoid valve, second oil pressure protection solenoid valve all are connected to steady voltage energy storage ware through the pipeline.
Preferably, the hydraulic control subsystem of the hydraulic control butterfly valve comprises: the one-way throttle valve is connected with the butterfly valve through a pipeline and used for controlling the fast and slow closing adjustment of the butterfly valve.
Preferably, a pressure gauge and a pressure-closing transmitter (SP4) are arranged on a pipeline connecting the one-way throttle valve and the superposition type pilot-controlled one-way valve.
Preferably, a first inductive proximity switch (SQ1), a second inductive proximity switch (SQ2) and a third inductive proximity switch (SQ3) are provided on a pipeline connecting the one-way throttle valve and the butterfly valve, wherein the first inductive proximity switch (SQ1) is a proximity switch for controlling the butterfly valve switch, the second inductive proximity switch (SQ2) is a proximity switch for controlling the butterfly valve switch, and the third inductive proximity switch (SQ3) is a bidirectional control proximity switch.
Preferably, the hydraulic control subsystem of the hydraulic control butterfly valve further comprises: the energy storage device comprises a superposition type hydraulic control one-way valve, an electro-hydraulic reversing valve, a hydraulic control one-way valve and an energy accumulator, wherein the superposition type hydraulic control one-way valve, the electro-hydraulic reversing valve, the hydraulic control one-way valve and the energy accumulator are connected with three inductive proximity switches (SQ1, SQ2 and SQ3) through pipelines, the superposition type hydraulic control one-way valve is connected with a one-way throttle valve through a pipeline, the input end of the hydraulic control one-way valve is connected with the output end of.
Preferably, an open-side pressure transmitter (SP3) and a pressure gauge are arranged on a pipeline connected with the one-way throttle valve by the superposition type pilot-controlled check valve, and a pressure gauge and a closed-side pressure transmitter (SP4) are arranged on a pipeline connected with the three inductive proximity switches (SQ1, SQ2 and SQ3) by the superposition type pilot-controlled check valve.
Preferably, the electro-hydraulic directional valve is connected with the oil filter through a one-way valve, and the electro-hydraulic directional valve is connected with a first electromagnet (YV1) and a second electromagnet (YV 2).
Preferably, the oil filter is connected with an axial plunger pump, the input end of the oil filter and the output end of the one-way valve are both connected with overflow valves, and the axial plunger pump is connected with a metering instrument.
Preferably, a first pressure switch (SP1) and a second pressure switch (SP2) are arranged on a pipeline connecting the pilot-controlled check valve and the accumulator, and are connected with a pressure gauge.
Preferably, the input end of the pilot-operated check valve is connected with an electromagnetic reversing ball valve and a third electromagnet (YV3), and the output end of the electromagnetic reversing ball valve is connected with the input end of the accumulator.
The utility model has the advantages that:
the hydraulic control butterfly valve oil cylinder pressure protection device solves the problem that equipment is damaged due to the fact that the hydraulic cylinder cavity is heated, expanded and overpressured under the pressure bearing state through transformation.
Drawings
Fig. 1 is according to the utility model discloses liquid accuse butterfly valve hydro-cylinder pressure protection device principle structure schematic diagram of embodiment.
Detailed Description
The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings, which are not intended to limit the scope of the invention.
Referring to fig. 1, a hydraulic control butterfly valve cylinder pressure protection device includes: hydraulic control butterfly valve hydraulic control subsystem and hydraulic control butterfly valve pressure protection system, wherein hydraulic control butterfly valve pressure protection system includes first oil pressure protection solenoid valve 13, second oil pressure protection solenoid valve 14 and steady voltage energy storage ware 15, first oil pressure protection solenoid valve 13 installs additional in hydraulic control oil station switch side oil pipe opening through the pipeline, second oil pressure protection solenoid valve 14 installs additional in hydraulic control oil station open side oil pipe opening through the pipeline, first oil pressure protection solenoid valve 13, second oil pressure protection solenoid valve 14 all is connected to steady voltage energy storage ware 15 through the pipeline.
The hydraulic control subsystem of the hydraulic control butterfly valve comprises: the one-way throttle valve 1 is connected with the butterfly valve through a pipeline, and the one-way throttle valve 1 is used for controlling the fast and slow closing regulation of the butterfly valve. And a pressure gauge 4 and a pressure closing transmitter SP4 are arranged on a pipeline connecting the one-way throttle valve 1 and the superposition type hydraulic control one-way valve 2. A first inductance type proximity switch SQ1, a second inductance type proximity switch SQ2 and a third inductance type proximity switch SQ3 are arranged on a pipeline connecting the one-way throttle valve 1 and the butterfly valve, wherein the first inductance type proximity switch SQ1 is a proximity switch for controlling the butterfly valve to be closed, the second inductance type proximity switch SQ2 is a proximity switch for controlling the butterfly valve to be opened, and the third inductance type proximity switch SQ3 is a two-way control proximity switch. The hydraulic control subsystem of the hydraulic control butterfly valve further comprises: the superposition type hydraulic control one-way valve 2, the electro-hydraulic reversing valve 6, the hydraulic control one-way valve 3 and the energy accumulator are connected with the three inductive proximity switches SQ1, SQ2 and SQ3 through pipelines, the superposition type hydraulic control one-way valve 2 is connected with the one-way throttle valve 1 through a pipeline, the input end of the hydraulic control one-way valve 3 is connected with the output end of the electro-hydraulic reversing valve 6, and the output end of the hydraulic control one-way valve 3 is connected with the stop valve 5. An open-side pressure transmitter SP3 and a pressure gauge 4 are arranged on a pipeline connecting the superposition type pilot-controlled check valve 2 and the check throttle valve 1, and the pressure gauge 4 and a closed-side pressure transmitter SP4 are arranged on a pipeline connecting the superposition type pilot-controlled check valve 2 and the three inductive proximity switches SQ1, SQ2 and SQ 3. The electro-hydraulic reversing valve 6 is connected with the oil filter 8 through a one-way valve 10, and the electro-hydraulic reversing valve 6 is connected with a first electromagnet YV1 and a second electromagnet YV 2. The oil filter 8 is connected with an axial plunger pump 12, the input end of the oil filter 8 and the output end of the one-way valve 10 are both connected with an overflow valve 11, and the axial plunger pump 12 is connected with a metering instrument. The pipeline of the pilot-controlled check valve 3 connected with the accumulator 7 is provided with a first pressure switch SP1 and a second pressure switch SP2, and is connected with a pressure gauge 4. The input end of the hydraulic control one-way valve 3 is connected with the electromagnetic directional ball valve 9 and the third electromagnet YV3, and the output of the electromagnetic directional ball valve 9 is connected with the input end of the energy accumulator.
In a word, the hydraulic control subsystem of the hydraulic control butterfly valve mainly comprises various control valves such as an oil pump, an oil pump motor, an overflow valve, a speed regulation valve, a manual valve, an electromagnetic valve and the like, or is called as a hydraulic station and a hydraulic control box. The control and coordination actions among all valves of the subsystem are as follows:
1. opening a valve: after the hydraulic control butterfly valve receives the valve opening signal, the oil pump motor is started; meanwhile, the electromagnetic valve is powered on and off (the positive electromagnetic valve type is powered on and the oil way of the electromagnetic valve is closed, and the reverse electromagnetic valve type is powered off and the oil way of the electromagnetic valve is closed). At the moment, hydraulic oil obtained by pressurization of the oil pump enters the hydraulic oil cylinder through the filter screen, the oil pump, the speed regulating valve, the high-pressure rubber pipe and the one-way valve (simultaneously through the slow closing time regulating valve, the fast closing time regulating valve and the fast and slow closing angle regulating valve), the oil cylinder piston is pushed to move, the oil cylinder piston drives the connecting head connected with the oil cylinder piston to rise through the heavy hammer, and simultaneously drives the valve shaft to open the butterfly plate; the residual hydraulic oil which is not subjected to speed regulation flows back to the tank through the overflow valve, and the valve opening time is regulated by the speed regulation valve.
2. Normally closing the valve: when the butterfly valve is closed, the electromagnetic valve is switched on when power is lost (the reverse electromagnetic valve is switched on), under the action of the heavy hammer, pressure oil in the hydraulic cylinder flows back to the oil tank through the fast-slow closing regulating valve, the fast-closing time regulating valve, the slow-closing world regulating valve, the high-pressure rubber pipe and the electromagnetic valve, and the butterfly plate is closed to realize two-stage closing according to a preset fast-closing program and a preset slow-closing program. The valve closing program comprises a fast closing time, a slow closing time and a fast and slow closing conversion angle which are set by a fast closing time regulating valve, a slow closing time regulating valve and a fast and slow closing angle regulating valve which are arranged on the hydraulic pressure.
3. The procedure for emergency valve closing is the same as the predetermined valve closing procedure for normal valve closing.
Referring to fig. 1 again, the valve action and working principle after adding the hydraulic control butterfly valve pressure protection system are as follows:
1. and (3) pressure maintaining action processes of full opening and full closing positions: when the valve is in a full-open position and the pressure SP3 of the rodless cavity is lower than 3MPa, the electromagnets YV3 and YV1 are electrified to act, and pressure oil of the accumulator 7 enters the rodless cavity of the oil cylinder to carry out full-open pressure maintaining. When the valve is in the full-closed position and the pressure SP4 of the rod cavity is lower than 3MPa, the electromagnets YV3 and YV2 are electrified to act, and the pressure oil of the accumulator 7 enters the rod cavity to perform full-closed pressure maintaining.
When the environmental temperature rises, the liquid pressure of the rod cavity or the rodless cavity of the oil cylinder is heated and expands to a high limit, the oil pressure protection electromagnetic valve 14 or 13 is opened and then discharged into the pressure-stabilizing energy accumulator 15, the pressure of the cavity of the oil cylinder is reduced, and when the pressure is reduced to be consistent with the pressure of the pressure-stabilizing energy accumulator 15, the oil pressure protection electromagnetic valve 14 or 13 is closed, so that the pressure of the cavity of the oil cylinder is maintained at a safe operation value.
2. The pipeline is connected to the pressure stabilizing energy accumulator 15 after the oil pipe opening at the opening side of the hydraulic control oil station is additionally provided with the pipeline and then is connected to the oil pressure protection electromagnetic valve 14, and the pipeline is connected to the pressure stabilizing energy accumulator 15 after the oil pipe opening at the closing side of the hydraulic control oil station is additionally provided with the pipeline and then is connected to the oil pressure protection electromagnetic valve 13.
3. The open-side pressure transmitter is increased to 16MPa, the oil pressure protection electromagnetic valve 14 is discharged into the pressure-stabilizing energy accumulator 15 after being opened, the pressure of the cavity of the oil cylinder is reduced, and the oil pressure protection electromagnetic valve 14 is closed after the pressure is reduced to be consistent with the pressure of the pressure-stabilizing energy accumulator 15; the process of closing the oil pressure protection is the same as above. The safe operation oil pressure of the opening side and the closing side of the oil cylinder is determined by adjusting the nitrogen charging pressure of the pressure stabilizing energy accumulator 15, and meanwhile, the pressure stabilizing energy accumulator 15 plays a role in stabilizing pressure to avoid that the pressure of the cavity of the oil cylinder is reduced too fast and too low.
The hydraulic control butterfly valve oil cylinder pressure protection device solves the problem that equipment is damaged due to the fact that the hydraulic cylinder cavity is heated, expanded and overpressured under the pressure bearing state through transformation.
The technical solutions provided by the embodiments of the present invention are described in detail above, and the principles and embodiments of the present invention are explained herein by using specific examples, and the descriptions of the above embodiments are only applicable to help understand the principles of the embodiments of the present invention; meanwhile, a person skilled in the art can change the embodiments and the application ranges according to the embodiments of the present invention, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (10)
1. The utility model provides a hydraulic control butterfly valve hydro-cylinder pressure protection device which characterized in that includes: hydraulic control butterfly valve hydraulic control subsystem and hydraulic control butterfly valve pressure protection system, wherein hydraulic control butterfly valve pressure protection system includes first oil pressure protection solenoid valve (13), second oil pressure protection solenoid valve (14) and steady voltage energy storage ware (15), first oil pressure protection solenoid valve (13) install additional in hydraulic control oil station switch side oil pipe opening through the pipeline, second oil pressure protection solenoid valve (14) install additional in hydraulic control oil station switch side oil pipe opening through the pipeline, first oil pressure protection solenoid valve (13), second oil pressure protection solenoid valve (14) all are connected to steady voltage energy storage ware (15) through the pipeline.
2. The hydraulic control butterfly valve cylinder pressure protection device of claim 1, wherein the hydraulic control butterfly valve hydraulic control subsystem comprises: the one-way throttle valve (1) is connected with the butterfly valve through a pipeline, and the one-way throttle valve (1) is used for controlling the fast and slow closing regulation of the butterfly valve.
3. The hydraulic control butterfly valve cylinder pressure protection device of claim 2, characterized in that: the butterfly valve is characterized in that a first inductance type proximity switch (SQ1), a second inductance type proximity switch (SQ2) and a third inductance type proximity switch (SQ3) are arranged on a pipeline connected with the butterfly valve through the one-way throttle valve (1), wherein the first inductance type proximity switch (SQ1) is used for controlling the proximity switch of the butterfly valve switch, the second inductance type proximity switch (SQ2) is used for controlling the proximity switch of the butterfly valve switch, and the third inductance type proximity switch (SQ3) is used for a two-way control proximity switch.
4. The hydraulic control butterfly valve cylinder pressure protection device of claim 3, characterized in that: the hydraulic control subsystem of the hydraulic control butterfly valve further comprises: through stack formula pilot operated check valve (2), electric-hydraulic directional control valve (6), pilot operated check valve (3) and energy storage ware (7) that pipeline and three inductance type proximity switch (SQ1, SQ2, SQ3) are connected, stack formula pilot operated check valve (2) are connected with one-way throttle valve (1) through the pipeline, the input of pilot operated check valve (3) with the output of electric-hydraulic directional control valve (6) is connected, stop valve (5) are connected to the output of pilot operated check valve (3).
5. The hydraulic control butterfly valve cylinder pressure protection device of claim 4, characterized in that: and a pressure gauge (4) and a pressure transmitter (SP4) are arranged on a pipeline connected with the one-way throttle valve (1) and the superposed hydraulic control one-way valve (2).
6. The hydraulic control butterfly valve cylinder pressure protection device of claim 5, characterized in that: the pressure-measuring device is characterized in that an open-side pressure transmitter (SP3) and a pressure gauge (4) are arranged on a pipeline connected with the superposition type hydraulic control one-way valve (2) and the one-way throttle valve (1), and the pressure gauge (4) and a closed-side pressure transmitter (SP4) are arranged on a pipeline connected with the superposition type hydraulic control one-way valve (2) and three inductance type proximity switches (SQ1, SQ2 and SQ 3).
7. The hydraulic control butterfly valve cylinder pressure protection device of claim 5, characterized in that: the electro-hydraulic reversing valve (6) is connected with the oil filter (8) through a one-way valve (10), and the electro-hydraulic reversing valve (6) is connected with a first electromagnet (YV1) and a second electromagnet (YV 2).
8. The hydraulic control butterfly valve cylinder pressure protection device of claim 7, characterized in that: the oil filter (8) is connected with an axial plunger pump (12), the input end of the oil filter (8) and the output end of the one-way valve (10) are both connected with an overflow valve (11), and the axial plunger pump (12) is connected with a metering instrument.
9. The hydraulic control butterfly valve cylinder pressure protection device of claim 5, characterized in that: and a first pressure switch (SP1) and a second pressure switch (SP2) are arranged on a pipeline for connecting the hydraulic control one-way valve (3) with the energy accumulator (7), and are connected with a pressure gauge (4).
10. The hydraulic control butterfly valve cylinder pressure protection device of claim 5, characterized in that: the input end of the hydraulic control one-way valve (3) is connected with an electromagnetic reversing ball valve (9) and a third electromagnet (YV3), and the output end of the electromagnetic reversing ball valve (9) is connected to the input end of the energy accumulator (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021199258.6U CN213574892U (en) | 2020-06-24 | 2020-06-24 | Hydraulic control butterfly valve oil cylinder pressure protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021199258.6U CN213574892U (en) | 2020-06-24 | 2020-06-24 | Hydraulic control butterfly valve oil cylinder pressure protection device |
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| Publication Number | Publication Date |
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| CN213574892U true CN213574892U (en) | 2021-06-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021199258.6U Active CN213574892U (en) | 2020-06-24 | 2020-06-24 | Hydraulic control butterfly valve oil cylinder pressure protection device |
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| CN (1) | CN213574892U (en) |
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2020
- 2020-06-24 CN CN202021199258.6U patent/CN213574892U/en active Active
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