CN210152733U - High-pressure cutoff equipment of steam turbine and steam turbine - Google Patents
High-pressure cutoff equipment of steam turbine and steam turbine Download PDFInfo
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- CN210152733U CN210152733U CN201920897850.4U CN201920897850U CN210152733U CN 210152733 U CN210152733 U CN 210152733U CN 201920897850 U CN201920897850 U CN 201920897850U CN 210152733 U CN210152733 U CN 210152733U
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Abstract
The utility model provides a steam turbine high pressure interdiction equipment and steam turbine, steam turbine high pressure interdiction equipment includes: a first interrupter solenoid valve block; a second interrupter solenoid valve block configured to be connected in series with the first interrupter solenoid valve block; the first intercepting electromagnetic valve group comprises at least two first intercepting electromagnetic valves, and the first intercepting electromagnetic valves are connected in parallel; the second intercepting solenoid valve group comprises at least two second intercepting solenoid valves, and the second intercepting solenoid valves are connected in parallel. Through the utility model discloses, solved among the correlation technique, high-pressure interruption equipment easily leads to the problem that high-pressure interruption equipment is holistic job stabilization nature receives the influence under the condition that single solenoid valve has the trouble, reaches and improves high-pressure interruption equipment job stabilization nature, and then improves the effect of the factor of safety of steam turbine.
Description
Technical Field
The utility model relates to an electromechanical field particularly, relates to a steam turbine high pressure interdiction equipment and steam turbine.
Background
The steam turbine is a rotary power machine that converts the energy of steam into mechanical work, and can be used in many situations such as power generation, power drive, and heat supply. The steam turbine can form an emergency state due to the fact that the internal operation speed is too high caused by various factors in the actual operation process; in order to avoid further equipment or personnel safety influence caused by the equipment in the above state, high-pressure cutoff equipment is usually arranged in the steam turbine. The high-pressure cutoff equipment can achieve the purpose of quickly discharging the safety oil in the steam turbine when the steam turbine has the condition of emergency unit safety.
In the related art, when a high-pressure interruption device in a steam turbine works, a fault of an internal single electromagnetic valve may occur, and other electromagnetic valves are operated by mistake, so that the high-pressure interruption device integrally causes a phenomenon of false tripping, and the phenomenon makes the high-pressure interruption device incapable of performing an effective test during the operation of the steam turbine; meanwhile, in the related technology, the phenomenon that a single electromagnetic valve is rejected is also easy to occur in the high-pressure interruption equipment in the steam turbine, and the phenomenon enables the high-pressure interruption equipment not to realize the quick discharge of safety oil under the emergency condition of the steam turbine, so that the problem that the safety is seriously affected by the overspeed operation and the like of the steam turbine is caused;
in view of the above problem in the related art, the overall working stability of the high-pressure interruption device is easily affected when a single solenoid valve of the high-pressure interruption device fails, and an effective solution has not been proposed in the related art.
SUMMERY OF THE UTILITY MODEL
An embodiment of the utility model provides a steam turbine high pressure interdiction equipment and steam turbine to in solving the correlation technique, high pressure interdiction equipment easily leads to the problem that high pressure interdiction equipment holistic job stabilization nature received the influence under the condition that single solenoid valve had the trouble.
According to an embodiment of the present invention, there is provided a steam turbine high pressure shut-off device, including:
a first interrupter solenoid valve block;
a second interrupter solenoid valve block configured to be connected in series with the first interrupter solenoid valve block;
the first intercepting electromagnetic valve group comprises at least two first intercepting electromagnetic valves, and the first intercepting electromagnetic valves are connected in parallel; the second intercepting solenoid valve group comprises at least two second intercepting solenoid valves, and the second intercepting solenoid valves are connected in parallel.
Optionally, the steam turbine high pressure trip apparatus further comprises:
at least one pressure switch disposed between the first set of interrupter solenoids and the second set of interrupter solenoids.
According to another embodiment of the present invention, there is also provided a steam turbine, comprising the steam turbine high pressure shut off device of any of the above; the steam turbine further comprises:
an oil-operated machine;
the safety oil pipeline is connected with the servomotor and used for maintaining the oil pressure of the servomotor;
the first intercepting electromagnetic valve group is connected to the safety oil pipeline, the second intercepting electromagnetic valve group is connected to the oil discharging pipeline, and the oil discharging pipeline is used for discharging safety oil in the oil motor.
Optionally, the steam turbine further comprises:
and the first intercepting electromagnetic valve group and the second intercepting electromagnetic valve group are both arranged to be connected with the quick-closing electromagnetic valve in parallel.
Optionally, the quick-closing solenoid valve is connected in parallel with a one-way adapter mechanism, the one-way adapter mechanism includes a one-way valve and an adapter plate, wherein the adapter plate is disposed at an outlet position of the one-way valve, and the adapter plate is configured to be turned on when the one-way valve is opened.
Optionally, an orifice is disposed above the adapter plate.
Optionally, the steam turbine further comprises:
an occlusion isolation valve disposed between the first occlusion valve bank and the relief oil line.
Alternatively, the blocking isolation valve is provided in series with the first blocking solenoid valve group, and the blocking isolation valve is provided in parallel with the quick-closing solenoid valve.
Optionally, an auxiliary oil discharge pipeline is connected to the interdiction isolation valve.
Optionally, the steam turbine further comprises:
the pressure oil pipeline is connected with the servomotor;
and the hydraulic control shutoff valve is arranged between the safety oil pipeline and the pressure oil pipeline and is used for communicating the pressure oil pipeline with the oil-motor under the control of safety oil.
Through the utility model, because the steam turbine high-pressure interdiction device comprises a first interdiction electromagnetic valve group and a second interdiction electromagnetic valve group which are connected in series, the first interdiction electromagnetic valve group comprises at least two first interdiction electromagnetic valves which are connected in parallel, and the second interdiction electromagnetic valve group comprises at least two second interdiction electromagnetic valves which are connected in parallel; therefore, the utility model discloses can solve among the correlation technique, high-pressure interdiction equipment easily leads to the problem that high-pressure interdiction equipment is holistic job stabilization nature receives the influence under the condition that single solenoid valve has the trouble, reaches and improves high-pressure interdiction equipment job stabilization nature, and then improves the effect of the factor of safety of steam turbine.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without undue limitation to the invention. In the drawings:
figure 1 is a schematic diagram of a high pressure trip apparatus for a steam turbine according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of a steam turbine provided in accordance with an embodiment of the present invention;
FIG. 3 is a schematic diagram of an oil circuit of a steam turbine according to an embodiment of the present invention;
fig. 4 is a schematic diagram illustrating a connection between a quick-closing solenoid valve and a servomotor according to an embodiment of the present invention;
fig. 5 is a schematic view of an adapter plate provided according to an embodiment of the present invention;
fig. 6 is a schematic connection diagram of a hydraulic shutoff valve according to an embodiment of the present invention.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.
Example 1
This embodiment provides a steam turbine high pressure interdiction equipment, and fig. 1 is according to the utility model discloses steam turbine high pressure interdiction equipment's structure schematic diagram, as shown in fig. 1, steam turbine high pressure interdiction equipment includes:
a first interrupter solenoid valve block 102;
a second interrupter solenoid valve group 104 arranged in series with the first interrupter solenoid valve group 102;
the first blocking solenoid valve 102 group includes at least two first blocking solenoid valves 1022, and the first blocking solenoid valves 1022 are connected in parallel; the second interrupting solenoid valve group 104 includes at least two second interrupting solenoid valves 1042, and the second interrupting solenoid valves 1042 are connected in parallel to each other.
According to the steam turbine high-pressure interdiction device in the embodiment, the steam turbine high-pressure interdiction device comprises a first interdiction electromagnetic valve group and a second interdiction electromagnetic valve group which are connected in series, the first interdiction electromagnetic valve group comprises at least two first interdiction electromagnetic valves which are connected in parallel, and the second interdiction electromagnetic valve group comprises at least two second interdiction electromagnetic valves which are connected in parallel; therefore, the steam turbine high-pressure interruption equipment in the embodiment can solve the problem that the whole working stability of the high-pressure interruption equipment is easily affected when a single electromagnetic valve fails in the related technology, and achieves the effects of improving the working stability of the high-pressure interruption equipment and further improving the safety factor of the steam turbine.
It should be further noted that, the first interrupting electromagnetic valve bank and the second interrupting electromagnetic valve bank in the steam turbine high-pressure interrupting device are respectively formed by connecting a plurality of first interrupting electromagnetic valves and a plurality of second interrupting electromagnetic valves in parallel, so that a failure of a single first interrupting electromagnetic valve or second interrupting electromagnetic valve does not cause the first interrupting electromagnetic valve bank or second interrupting electromagnetic valve bank to fail. In the actual operation process of the steam turbine high-pressure interdiction equipment, under the condition that any one first interdiction electromagnetic valve in the first interdiction electromagnetic valve group is refused to operate, safety oil can be quickly discharged through other normally-operated first interdiction electromagnetic valves in the first interdiction electromagnetic valve group, so that the emergency interdiction treatment of the steam turbine high-pressure interdiction equipment under the condition that the steam turbine generates emergency working conditions is realized; the principle of the second intercepting solenoid valve set is the same as that of the first intercepting solenoid valve set, and the description is omitted here.
Through above-mentioned technical scheme, because in first interdiction electromagnetism valves or the second interdiction electromagnetism valves in the second interdiction electromagnetism valves arbitrary one first interdiction electromagnetism valve or the second interdiction electromagnetism valve produce the trouble, all can not cause the whole unable work of first interdiction electromagnetism valve or second interdiction electromagnetism valve, so can make the job stabilization nature of first interdiction electromagnetism valves and second interdiction electromagnetism valves improve, and then make the whole job stabilization effect of steam turbine high pressure interdiction equipment promote.
In addition, the steam turbine high-pressure cutoff device in this embodiment can be modified on the basis of the original high-pressure cutoff device on the premise of improving the working stability of the device, and the steam turbine high-pressure cutoff device in this embodiment is not limited to the working parameters or performances of the single first cutoff solenoid valve and the single second cutoff solenoid valve, so that the cost can be effectively controlled, that is, the stability and the safety of the steam turbine in the operation process can be improved in a low-cost manner.
In an alternative embodiment, the steam turbine high pressure trip apparatus further comprises:
at least one pressure switch 106, the at least one pressure switch 106 disposed between the first set of interrupter solenoids 102 and the second set of interrupter solenoids 104.
It needs to be further explained that, according to the technical scheme, the plurality of pressure switches are arranged between the first interceptor solenoid valve group and the second interceptor solenoid valve group to replace travel switches arranged at other pipeline positions of the steam turbine in the related art, so that the working stability effect of the high-pressure interceptor equipment of the steam turbine is further improved, and meanwhile, the high-pressure interceptor equipment of the steam turbine tends to be integrated, and the installation and maintenance efficiency is further improved.
Example 2
The present embodiment provides a steam turbine comprising the steam turbine high pressure shut off device of the above embodiments; fig. 2 is a schematic structural diagram of a steam turbine according to an embodiment of the present invention, and as shown in fig. 2, the steam turbine further includes:
a servomotor 202;
a relief oil line 204 connected to the servomotor 202, the relief oil line 204 being configured to hold an oil pressure of the servomotor 202;
the first interrupter solenoid valve group 102 is connected to a relief oil line 204, the second interrupter solenoid valve group 202 is connected to an oil discharge line 206, and the oil discharge line 206 is used for discharging relief oil in the oil motor 202.
According to the steam turbine in the embodiment, the steam turbine high-pressure cutoff equipment in the steam turbine comprises a first cutoff electromagnetic valve group and a second cutoff electromagnetic valve group which are connected in series, the first cutoff electromagnetic valve group comprises at least two first cutoff electromagnetic valves which are connected in parallel, and the second cutoff electromagnetic valve group comprises at least two second cutoff electromagnetic valves which are connected in parallel; therefore, the steam turbine in this embodiment can solve the problem that the overall working stability of the high-pressure trip equipment is easily affected when a single solenoid valve of the high-pressure trip equipment fails in the related art, and achieves the effects of improving the working stability of the high-pressure trip equipment and further improving the safety factor of the steam turbine.
It needs to be further explained that when the steam turbine generates critical working conditions, the safety oil in the oil motor needs to be discharged; under the working condition, the first intercepting solenoid valve set connected to the safety oil pipeline and the second intercepting solenoid valve set connected with the first intercepting solenoid valve set are powered off and opened, so that the safety oil can be discharged through the first intercepting solenoid valve set and the second intercepting solenoid valve set; the safe oil after the discharge can exist in the container alone, also can directly leading-in to the oil tank of steam turbine in, the utility model discloses do not prescribe a limit to this. Fig. 3 is a schematic diagram of an oil path of a steam turbine according to an embodiment of the present invention, and the oil path distribution of safety oil in the steam turbine in this embodiment is as shown in fig. 3.
In an alternative embodiment, the steam turbine further comprises:
a quick-closing solenoid 208, the quick-closing solenoid 208 is provided in the relief oil line 204, and the first blocking solenoid valve group 102 and the second blocking solenoid valve group 104 are both provided in parallel connection with the quick-closing solenoid 208. Fig. 4 is a schematic diagram of connection between a quick-closing solenoid valve and a servomotor according to an embodiment of the present invention, and a connection relationship between the quick-closing solenoid valve and the servomotor is shown in fig. 4.
In an alternative embodiment, a one-way changeover mechanism is connected in parallel to the quick-closing solenoid valve 208, which comprises a one-way valve 209 and a changeover plate 210, wherein the changeover plate 210 is arranged in the outlet position of the one-way valve 209 and the changeover plate 210 is designed to be switched on when the one-way valve 209 is open.
It should be further noted that the conducting direction of the check valve in the one-way adapter mechanism is the moving direction of the safety oil in the safety oil pipeline, as shown in fig. 4, the conducting direction of the check valve in the installation position of the check valve shown in fig. 4 is the flowing direction from bottom to top at the position corresponding to the check valve. The adapter plate is used for being conducted when the check valve is opened, and specifically indicates that when the check valve is opened, the adapter plate is in an opening state along with a valve core of the check valve and is conducted through a pipeline where another check adapter mechanism is located. Fig. 5 is a schematic view of an adapter plate according to an embodiment of the present invention, wherein the adapter plate is connected to a check valve as shown in fig. 5. The one-way switching mechanism can realize the conduction of safety oil through the one-way valve when the quick-closing electromagnetic valve fails and fails to work, so that the safety oil is further drained through the high-voltage interruption module. The check valve may be a spring-type check valve to provide a minimum opening pressure for the check valve.
In an alternative embodiment, an orifice 212 is disposed above the adapter plate 210.
It needs to be further explained that when the turbine recovers from the critical state, the oil engine needs a larger safe oil amount at the recovery moment; if the safety oil in the safety oil pipeline directly enters the servomotor according to the required oil quantity, the safety oil quantity in the pipeline is too low to form a trip phenomenon; the arrangement of the throttling hole can enable the safety oil to slowly enter the oil engine, and therefore the phenomenon of trip in the safety oil pipeline is effectively avoided.
In an alternative embodiment, the steam turbine further comprises:
a block isolation valve 214, the block isolation valve 214 disposed between the first block of block 102 and the relief oil line 204.
In an alternative embodiment, a shutoff isolation valve 214 is provided in series with the first shutoff solenoid valve set 102, and the shutoff isolation valve 214 is provided in parallel with the quick-closing solenoid valve 208.
It is further noted that the blocking isolation valve is arranged on the same branch circuit with the first blocking electromagnetic valve group and the second blocking electromagnetic valve group, and the branch circuit and the quick-closing electromagnetic valve are connected in parallel; the trip isolation valve may be coupled to a mechanical drive mechanism (typically coupled to a trip device linkage) for detecting the rotational speed condition of the turbine during operation.
In an alternative embodiment, an auxiliary drain line 218 is connected to the block isolation valve 214.
It should be further noted that the auxiliary oil discharge pipeline is used for realizing partial discharge when the safety oil enters the blocking isolation valve, so that one part of the safety oil entering the blocking isolation valve enters the first blocking electromagnetic valve group and the second blocking electromagnetic valve group to be discharged, and the other part of the safety oil enters the auxiliary oil discharge pipeline to be discharged, and further the safety oil discharge efficiency is further improved. Supplementary oil extraction pipeline can be connected with oil extraction pipeline, also can be alone with safe oil transmission among the oil tank of steam turbine, the utility model discloses do not do the restriction to this.
In an alternative embodiment, the steam turbine further comprises:
a pressure oil line 220 provided to be connected to the servomotor 202;
and a pilot-operated shutoff valve 216, the pilot-operated shutoff valve 216 being disposed between the relief oil line 204 and the pressure oil line 220, the pilot-operated shutoff valve 216 being configured to communicate the pressure oil line 220 with the servomotor 202 under the control of the relief oil.
It should be further noted that the pressure oil pipeline can be used for guiding the pressure oil to the servomotor from the outside when the servomotor is restored from the critical working condition, for example, an external oil storage device; the hydraulic control shut-off valve can be a one-way valve, and when safety oil is injected into the safety oil pipeline, the hydraulic control shut-off valve is opened under the action of the safety oil (the safety oil pressure needs to reach the opening pressure threshold of the hydraulic control shut-off valve), so that the pressure oil pipeline connected with the other hydraulic control shut-off valve is communicated, and the pressure oil in the other pressure oil pipeline can be injected into the oil engine through the communicated pressure oil pipeline. Fig. 6 is a schematic connection diagram of a hydraulic shut-off valve provided according to an embodiment of the present invention, and the hydraulic shut-off valve is disposed between the relief oil line 204 and the pressure oil line 220, as shown in fig. 6.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A steam turbine high pressure trip apparatus, comprising:
a first interrupter solenoid valve block;
a second interrupter solenoid valve block configured to be connected in series with the first interrupter solenoid valve block;
the first intercepting electromagnetic valve group comprises at least two first intercepting electromagnetic valves, and the first intercepting electromagnetic valves are connected in parallel; the second intercepting solenoid valve group comprises at least two second intercepting solenoid valves, and the second intercepting solenoid valves are connected in parallel.
2. The apparatus of claim 1, wherein the turbine high pressure trip apparatus further comprises:
at least one pressure switch disposed between the first set of interrupter solenoids and the second set of interrupter solenoids.
3. A steam turbine comprising a steam turbine high pressure trip apparatus according to claim 1 or 2; the steam turbine further comprises:
an oil-operated machine;
the safety oil pipeline is connected with the servomotor and used for maintaining the oil pressure of the servomotor;
the first intercepting electromagnetic valve group is connected to the safety oil pipeline, the second intercepting electromagnetic valve group is connected to the oil discharging pipeline, and the oil discharging pipeline is used for discharging safety oil in the oil motor.
4. The steam turbine of claim 3, further comprising:
and the first intercepting electromagnetic valve group and the second intercepting electromagnetic valve group are both arranged to be connected with the quick-closing electromagnetic valve in parallel.
5. The steam turbine according to claim 4, wherein a one-way changeover mechanism is connected in parallel to the quick-closing solenoid valve, the one-way changeover mechanism comprising a one-way valve and a changeover plate, wherein the changeover plate is provided at an outlet position of the one-way valve, and the changeover plate is adapted to be turned on when the one-way valve is opened.
6. The turbine according to claim 5 wherein said adapter plate has an orifice disposed thereon.
7. The steam turbine of any of claims 4 to 6, further comprising:
an occlusion isolation valve disposed between the first occlusion valve bank and the relief oil line.
8. The steam turbine of claim 7, wherein the block isolation valve is arranged in series with the first block solenoid valve set and the block isolation valve is arranged in parallel with the fast-closing solenoid valve.
9. The turbine of claim 7 wherein an auxiliary bleed line is connected to the trip isolation valve.
10. The steam turbine of any of claims 4 to 6, further comprising:
the pressure oil pipeline is connected with the servomotor;
and the hydraulic control shutoff valve is arranged between the safety oil pipeline and the pressure oil pipeline and is used for communicating the pressure oil pipeline with the oil-motor under the control of safety oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920897850.4U CN210152733U (en) | 2019-06-14 | 2019-06-14 | High-pressure cutoff equipment of steam turbine and steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920897850.4U CN210152733U (en) | 2019-06-14 | 2019-06-14 | High-pressure cutoff equipment of steam turbine and steam turbine |
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| Publication Number | Publication Date |
|---|---|
| CN210152733U true CN210152733U (en) | 2020-03-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920897850.4U Active CN210152733U (en) | 2019-06-14 | 2019-06-14 | High-pressure cutoff equipment of steam turbine and steam turbine |
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| CN (1) | CN210152733U (en) |
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- 2019-06-14 CN CN201920897850.4U patent/CN210152733U/en active Active
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