CN217234505U - Crisis interruption module capable of being replaced on line for steam turbine generator unit - Google Patents

Abstract

The application relates to a can change crisis shutoff module on line for turbo generator set, it includes the oil circuit carrier, be equipped with four AST valves, two OPC valves and gasoline economizer carrier on the oil circuit carrier, be equipped with the gasoline economizer in the gasoline economizer carrier, through the detachable connection of first quick-connect piece between AST valve and the oil circuit carrier, A interface, B interface, X interface, the Y interface of AST valve all are equipped with first stop valve. This application is through setting up first stop valve, after a certain AST valves on-line test breaks down, can start corresponding first stop valve, then change on line this AST valves, need not shut down, has greatly reduced economic loss.

Description

On-line replaceable crisis interdiction module for steam turbine generator unit

Technical Field

The application relates to the field of emergency trip systems, in particular to a emergency trip module capable of being replaced on line for a steam turbine generator unit.

Background

Ast (opc) critical obstruction system. The method has the significance of preventing the steam turbine from generating serious damage accidents possibly caused by the abnormal work of part of equipment during the operation of the steam turbine. An ast (opc) critical shutdown system monitors certain operating parameters of the steam turbine and when these parameters exceed their operational limits, the system sends a shutdown signal to close all of the steam turbine steam admission valves. The parameters monitored are as follows: turbine overspeed, thrust bearing wear, bearing oil pressure being too low, condenser vacuum being too low, and fuel resistance oil pressure being too low.

The existing crisis breaking system basically adopts the design of the original American West House company, adopts the series-parallel connection arrangement of four AST electromagnetic valves, has high reliability and has the function of online test electromagnetic valves.

As shown in fig. 6, the hydraulic schematic diagram of an executing element of an existing AST (OPC) critical interruption module is shown, that is, the AST (OPC) critical interruption module includes a manual directional valve, four AST valve banks connected in series and parallel, two OPC modules, an oil inlet economizer, an oil return economizer, and the like, the four AST valve banks have the same structure, and each of the four AST valve banks has A, B, X, Y four interfaces.

In view of the above-mentioned related technologies, the inventor believes that when the AST valve set is in a problem in the online test, the AST valve set must be replaced by a shutdown maintenance, which is too costly, and thus a critical interruption module capable of replacing the AST valve set online without shutdown is urgently needed.

SUMMERY OF THE UTILITY MODEL

In order to carry out online maintenance and replacement to the AST valves, reduce the economic loss that the shut down leads to, this application provides a but online change crisis interdiction module for turbo generator set.

The application provides a but, change crisis interdiction module on line for turbo generator set adopts following technical scheme:

the utility model provides a can change crisis shutoff module on line for turbo generator set, includes the oil circuit carrier, be equipped with four AST valves, two OPC valves and gasoline economizer carrier on the oil circuit carrier, be equipped with the gasoline economizer in the gasoline economizer carrier, through the detachable connection of first quick-operation joint piece between AST valve and the oil circuit carrier, A interface, B interface, X interface, the Y interface of AST valve all are equipped with first stop valve.

Through adopting above-mentioned technical scheme, through setting up first stop valve, after a certain AST valves on-line test breaks down, can start corresponding first stop valve, this oil circuit part cuts, then changes on line this AST valves, need not shut down, has greatly reduced economic loss.

And because the oil circuit of trouble AST valves cuts off for the AST valves can normally use in addition, consequently, online test and on-line monitoring can continue to go on.

Secondly, through setting up first fast union piece, can accomplish the dismantlement of trouble AST valves and the installation of new AST valves very fast to reduce the influence that causes because of the oil circuit cuts for a long time.

Optionally, the fuel economizer carrier is detachably connected with the oil path carrier through a second quick connector, and a second stop valve is arranged on the fuel inlet interface, the fuel outlet interface and the fuel return interface of the fuel economizer.

The ASP pressure is generated by matching the fuel economizer in the fuel economizer carrier, and once any fuel economizer is blocked, the ASP pressure value is influenced, so that the online test function of the AST electromagnetic valve is invalid. However, the two fuel economizers must be maintained and disposed of in a shutdown state of the unit.

Therefore, by adopting the technical scheme, when the economizer is blocked, the second stop valve can be started to cut off the part of the oil way, then the economizer carrier is disassembled to clean or replace the economizer, the process does not need to be stopped, and therefore unnecessary economic loss is reduced.

And through setting up the second fast union piece, can accomplish the dismouting of gasoline economizer carrier very fast to reduce the influence that causes because of the oil circuit cuts for a long time.

Optionally, the first quick connector comprises four sliding blocks respectively located on the outer peripheral surface of the AST valve bank, the sliding blocks are horizontally connected with the AST valve bank in a sliding manner, and the AST valve bank is further provided with a spring for forcing the sliding blocks to slide outwards; the upper surface of the oil way carrier is provided with a mounting groove matched with the lower part of the AST valve group, the horizontal edge of the end surface of the sliding block is provided with a first chamfer, and the groove wall of the mounting groove is provided with a positioning groove for the sliding block to be horizontally inserted and matched in shape.

Through adopting above-mentioned technical scheme, during the installation, the AST valves moves down vertically for the first chamfer butt of slider is in the notch edge department of mounting groove, and the inclined plane of overdraft then through first chamfer divide into the component force that forces the slider to inwards slide, and slider elasticity dodges the edge of mounting groove this moment, so that the AST valves can get into in the mounting groove, and the AST valves continues to move down until the slider corresponds the constant head tank, and the spring resumes deformation this moment, so that force the slider outwards to slide in order to insert the constant head tank, thereby accomplish the installation of AST valves.

When the AST valve bank is disassembled, the AST valve bank is pulled upwards forcibly, the upward pulling force is divided into component force forcing the sliding block to slide inwards through the inclined surface of the first chamfer, and the sliding block elastically avoids the positioning groove to relieve the limit, so that the AST valve bank can be separated from the mounting groove upwards, and the disassembly of the AST valve bank is completed.

Optionally, two vertical edges of the end surface of the slider are provided with second chamfers.

Through adopting above-mentioned technical scheme, because the shape of constant head tank and the shape looks adaptation of slider, consequently the slider receives the spring and when inserting in the constant head tank, through the cooperation of first chamfer and second chamfer for the elastic force has the centering component of level and two vertical directions, with the grafting precision that improves slider and constant head tank, thereby improves the installation accuracy of AST valves.

Optionally, a sealing ring is arranged on a notch of the mounting groove, and an inner circumferential surface of the sealing ring abuts against an outer circumferential surface of the AST valve set.

Through adopting above-mentioned technical scheme, improve the leakproofness to in reducing dust etc. and getting into the clearance between AST valves and the mounting groove.

Optionally, the AST valves are vertically connected with an inserted bar in a sliding mode, the sliding block is provided with a jack, and when the sliding block is inserted into the positioning groove, the jack is located under the inserted bar.

Through adopting above-mentioned technical scheme, when the slider inserts in the constant head tank, can move down the inserted bar, make it cooperate with the jack to increase spacing effect further, take place with the reduction because of the less condition that leads to the slider accident to deviate from the constant head tank of spring force.

Optionally, the insertion holes are strip-shaped holes, and the length direction of the insertion holes is horizontally perpendicular to the sliding direction of the sliding block; the lower extreme eccentric of inserted bar is fixed with the lug, the inserted bar with be equipped with the torsional spring between the AST valves, the torsional spring be used for forcing the lug butt in the jack deviate from on the pore wall of constant head tank.

Through adopting above-mentioned technical scheme, when the slider inserted in the constant head tank, move down in the inserted bar gets into the jack, the inserted bar was rotated to the torsional spring this moment for lug butt on the inserted bar is on the pore wall of the constant head tank that deviates from of jack, forces the slider to insert the constant head tank still further promptly, and the spacing power of slider comes from the dual stack of torsional spring and spring promptly, and spacing effect is more showing promptly.

Meanwhile, when the plug-in rod is disassembled, the plug-in rod moves upwards to be separated from the jack, the application of the acting force of the torsion spring is removed, only the spring force is applied, therefore, the sliding block is separated from the positioning groove more simply, and the disassembling difficulty is lower.

Optionally, the upper surface of AST valves is equipped with the riser, the one end of torsional spring with inserted bar fixed connection, the other end butt of torsional spring in on the vertical face of riser.

Through adopting above-mentioned technical scheme, through the vertical face of riser, can ensure that the inserted bar reciprocates the in-process, the both ends of torsional spring have the butt all the time, and the elasticity of torsional spring is applyed on the inserted bar always.

In summary, the present application includes at least one of the following beneficial technical effects:

1. by arranging the first stop valve, when one AST valve bank fails in an online test, the corresponding first stop valve can be started, and then the AST valve bank is replaced online without stopping, so that the economic loss is greatly reduced;

2. the second stop valve is started to cut off the part of the oil way, and then the fuel economizer carrier is disassembled to clean or replace the fuel economizer, so that the process is not required to be stopped, and unnecessary economic loss is reduced;

3. through setting up first fast union piece and second fast union piece, can accomplish the dismouting of AST valves and gasoline economizer carrier very fast to reduce because of the influence that the oil circuit cuts for a long time and cause.

Drawings

Fig. 1 is a schematic view of the entire structure of embodiment 1.

Fig. 2 is an exploded view for showing a connection relationship between the AST valve block and the oil passage carrier of embodiment 2.

Fig. 3 is a schematic structural view of a slider of embodiment 2.

Fig. 4 is a partial sectional view showing the fitting relationship between the slider and the positioning groove according to embodiment 2.

Fig. 5 is a partially enlarged view of a portion a in fig. 2.

Fig. 6 is a hydraulic schematic diagram of an actuator of a conventional ast (opc) critical shutoff module.

Description of reference numerals: 1. an oil circuit carrier; 2. an AST valve bank; 3. an OPC valve bank; 4. a economizer carrier; 5. a manual directional control valve; 6. a first quick connector; 11. mounting grooves; 12. a seal ring; 13. positioning a groove; 21. a first shut-off valve; 22. a chute; 23. a slide hole; 41. a second stop valve; 42. a second quick connect; 61. a slider; 611. a first chamfer; 612. a second chamfer; 613. a jack; 62. inserting a rod; 621. a bump; 63. a spring; 64. a torsion spring; 65. a riser.

Detailed Description

The present application is described in further detail below with reference to figures 1-6.

The embodiment 1 of the application discloses a crisis interruption module capable of being replaced on line for a steam turbine generator unit.

Referring to fig. 1, the on-line replaceable crisis interruption module for a steam turbine generator unit comprises an oil way carrier 1, wherein a plurality of oil ways are arranged inside the oil way carrier 1 so as to facilitate oil way connection; the upper surface of the oil path carrier 1 is provided with four AST valve groups 2, two OPC valve groups 3 and a manual reversing valve 5, the four AST valve groups 2 are arranged in series and parallel, the side surface of the oil path carrier 1 is provided with an oil economizer carrier 4, and an oil inlet oil economizer and an oil outlet oil economizer (not shown in the figure) are arranged in the oil economizer carrier 4.

The AST valve group 2 is detachably connected with the oil way carrier 1 through a first quick connector 6, the fuel economizer carrier 4 is detachably connected with the oil way carrier 1 through a second quick connector 42, and the first quick connector 6 and the second quick connector 42 can be bolts, bolts or other quick connection structures, so that the sub-module is detachably connected with the oil way carrier 1; the first quick-connecting piece 6 and the second quick-connecting piece 42 in this embodiment are bolts arranged in four points.

As shown in fig. 1, the a port, the B port, the X port, and the Y port of the AST valve group 2 are all provided with first stop valves 21, the oil inlet port, the oil outlet port, and the oil return port of the oil device are all provided with second stop valves 41, and the first stop valves 21 and the second stop valves 41 may be manual type or electromagnetic type.

The implementation principle of the embodiment 1 is as follows: firstly, in the online test process, when a certain AST valve bank 2 fails in a test, the first stop valve 21 of the AST valve bank 2 can be started, the oil way is partially cut off, then the AST valve bank 2 is replaced online, the shutdown is not needed, and the economic loss is greatly reduced.

And because the oil circuit of trouble AST valves 2 cuts off for AST valves 2 can normally use in addition, consequently, online test and on-line monitoring can continue to go on.

Secondly, when any one economizer is blocked to influence the ASP pressure value, the second stop valve 41 is started to cut off the part of the oil path, then the economizer carrier 4 is disassembled to clean or replace the economizer, and the process does not need to stop to disassemble the economizer carrier 4, so that unnecessary economic loss is reduced.

Embodiment 2 is different from embodiment 1 in that, as shown in fig. 2, a square installation groove 11 adapted to a lower portion of the AST valve group 2 is formed in an upper surface of the oil passage carrier 1, a seal ring 12 is provided at a notch of the installation groove 11, the lower portion of the AST valve group 2 is inserted into the installation groove 11, and an inner circumferential surface of the seal ring 12 abuts against an outer circumferential surface of the AST valve group 2.

As shown in fig. 3 and 4, the first quick connector 6 includes four sliding blocks 61 respectively located on the outer peripheral surface of the AST valve set 2, specifically, a sliding groove 22 is horizontally formed in the outer peripheral surface of the lower portion of the AST valve set 2, the sliding blocks 61 and the sliding groove 22 are connected in a sliding manner along the horizontal direction, a spring 63 is further arranged in the sliding groove 22, the sliding blocks 61 are forced to slide outwards by the elastic force of the spring 63, first chamfers 611 are respectively arranged at horizontal edges of the end surfaces of the sliding blocks 61 far away from the AST valve set 2, and second chamfers 612 are respectively arranged at vertical edges of the end surfaces of the sliding blocks 61 far away from the AST valve set 2; the groove wall of the mounting groove 11 is provided with a positioning groove 13, and the shape of the positioning groove 13 is matched with that of the sliding block 61.

During installation, the AST valve group 2 is vertically moved downwards, the first chamfer 611 of the sliding block 61 abuts against the edge of the notch of the installation groove 11, at the moment, downward pressure is divided into component force for forcing the sliding block 61 to slide inwards through the inclined surface of the first chamfer 611, the sliding block 61 retracts into the sliding groove 22 at the moment, the spring 63 is compressed, at the moment, the AST valve group 2 can enter the installation groove 11, then the AST valve group 2 continues to move downwards until the sliding block 61 corresponds to the positioning groove 13, at the moment, the spring 63 recovers deformation, so that the sliding block 61 is forced to slide outwards to be inserted into the positioning groove 13, and installation of the AST valve group 2 is completed.

During disassembly, the AST valve group 2 is pulled up forcibly, at the moment, the pulling-up force is divided into component force forcing the sliding block 61 to slide inwards through the inclined surface of the first chamfer 611, the sliding block 61 retracts into the sliding groove 22 to release the limit, so that the AST valve group 2 can be separated from the installation groove 11 upwards, and the disassembly of the AST valve group 2 is completed.

Namely, the AST valve group 2 can be quickly assembled and disassembled by arranging the first quick connector 6, so that the influence caused by long-time oil circuit cutoff is reduced.

In order to further increase the installation stability of the AST valve group 2, the AST valve group 2 is further provided with a sliding hole 23 vertically penetrating through the AST valve group 2, an inserting rod 62 is vertically connected in the sliding hole 23 in a sliding manner, a vertical plate 65 is fixed on the upper surface of the AST valve group 2, and a torsion spring 64 is sleeved on the inserting rod 62, specifically, one end of the torsion spring 64 is fixedly connected with the inserting rod 62, and the other end of the torsion spring 64 abuts against the vertical surface of the vertical plate 65; the slider 61 vertically runs through and is seted up the jack 613, and the jack 613 is the bar hole, and the length direction level perpendicular to slider 61's the slip direction of jack 613, the lower extreme of inserted bar 62 can be inserted in the jack 613, the fixed lug 621 of lower extreme of inserted bar 62.

When the sliding block 61 is inserted into the positioning slot 13 by the elasticity of the spring 63, the inserting rod 62 is moved downwards, so that the lower end of the inserting rod 62 extends into the inserting hole 613, and then under the action of the torsion spring 64, the inserting rod 62 rotates, so that the convex block 621 on the inserting rod abuts against the hole wall of the inserting hole 613, which is far away from the positioning slot 13, and it can be understood that the elasticity of the torsion spring 64 and the spring 63 are overlapped to force the sliding block 61 to be inserted into the positioning slot 13 more stably, thereby improving the installation stability of the AST valve set 2.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (8)

1. The utility model provides a can change crisis interruption module on line for turbo generator set, includes oil circuit carrier (1), be equipped with four AST valves (2), two OPC valves (3) and gasoline economizer carrier (4) on oil circuit carrier (1), be equipped with the gasoline economizer in gasoline economizer carrier (4), its characterized in that: the AST valve bank (2) is detachably connected with the oil way carrier (1) through a first quick connector (6), and a port A, a port B, a port X and a port Y of the AST valve bank (2) are respectively provided with a first stop valve (21).

2. The on-line replaceable crisis shutdown module for a steam turbine generator unit of claim 1, wherein: the fuel economizer is characterized in that the fuel economizer carrier (4) is detachably connected with the fuel line carrier (1) through a second quick connector (42), and a second stop valve (41) is arranged on an oil inlet interface, an oil outlet interface and an oil return interface of the fuel economizer.

3. The on-line replaceable crisis shutdown module for a steam turbine generator unit of claim 1, wherein: the first quick connecting piece (6) comprises four sliding blocks (61) which are respectively positioned on the peripheral surface of the AST valve group (2), the sliding blocks (61) are horizontally connected with the AST valve group (2) in a sliding mode, and the AST valve group (2) is further provided with a spring (63) used for forcing the sliding blocks (61) to slide outwards; the adaptation has been seted up to the upper surface of oil circuit carrier (1) installation groove (11) of AST valves (2) lower part, the horizontal edge department of the terminal surface of slider (61) all is equipped with first chamfer (611), the confession has been seted up to the cell wall of installation groove (11) slider (61) level is inserted and is established constant head tank (13) of just shape adaptation.

4. The on-line replaceable crisis shutdown module for a steam turbine generator unit of claim 3, wherein: and two vertical edges of the end surface of the sliding block (61) are provided with second chamfers (612).

5. The on-line replaceable crisis shutdown module for a steam turbine generator unit of claim 3, wherein: and a sealing ring (12) is arranged on a notch of the mounting groove (11), and the inner peripheral surface of the sealing ring (12) abuts against the outer peripheral surface of the AST valve group (2).

6. The on-line replaceable crisis shutdown module for a steam turbine generator unit according to claim 3, wherein: AST valves (2) vertical sliding connection has inserted bar (62), slider (61) are equipped with jack (613), work as slider (61) insert when in constant head tank (13), jack (613) are located under inserted bar (62).

7. The on-line replaceable crisis shutdown module for a steam turbine generator unit according to claim 6, wherein: the insertion holes (613) are strip-shaped holes, and the length direction of the insertion holes (613) is horizontally vertical to the sliding direction of the sliding block (61); the lower extreme eccentric of inserted bar (62) is fixed with lug (621), inserted bar (62) with be equipped with torsional spring (64) between AST valves (2), torsional spring (64) are used for forcing lug (621) butt in jack (613) deviate from on the pore wall of constant head tank (13).

8. The on-line replaceable crisis shutdown module for a steam turbine generator unit of claim 7, wherein: the upper surface of AST valves (2) is equipped with riser (65), the one end of torsional spring (64) with inserted bar (62) fixed connection, the other end butt of torsional spring (64) in on the vertical surface of riser (65).

Images