CN217270345U - 3.2MW steam turbine admission structure - Google Patents
3.2MW steam turbine admission structure Download PDFInfo
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- CN217270345U CN217270345U CN202221359254.9U CN202221359254U CN217270345U CN 217270345 U CN217270345 U CN 217270345U CN 202221359254 U CN202221359254 U CN 202221359254U CN 217270345 U CN217270345 U CN 217270345U
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Abstract
A3.2 MW steam turbine admission structure relates to the technical field of steam turbines. The utility model discloses a solve the relatively poor and unable online problem of maintaining of current poppet valve admission structure control accuracy. The utility model discloses a main steam valve, two governing valves, two nozzles and three actuating mechanism, main steam valve, the equal rigid coupling of governing valve and nozzle is on first one of the cylinder, the steam inlet end and the steam turbine admission flange joint of main steam valve, two governing valves set up the rear side at main steam valve side by side, the steam inlet end of governing valve is linked together with the steam exhaust end of main steam valve respectively, be equipped with the buffer chamber between the steam exhaust end of main steam valve and the steam inlet end of governing valve, the steam exhaust end and the first nozzle room of one of them governing valve are connected, the steam exhaust end and the second nozzle room of another governing valve are connected, all be connected with the nozzle on first nozzle room and the second nozzle room, main steam valve and two governing valves respectively are connected with an actuating mechanism. The utility model is used for the steam turbine admission.
Description
Technical Field
The utility model relates to a steam turbine technical field, concretely relates to 3.2MW steam turbine admission structure.
Background
The 3.2MW steam turbines in the current market are less in application, the steam turbines with the same power level mostly adopt a lifting plate valve structure, the valve structure is simple, the control precision is poor, and the executing mechanism can only be stopped and overhauled when the executing mechanism breaks down due to the fact that a plurality of valves share one executing mechanism. The steam inlet structure of the lifting plate valve cannot meet the requirements of a 3.2MW test project on controllability and maintainability.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve the relatively poor and unable online problem of maintaining of current poppet valve admission structure control accuracy, and then propose a 3.2MW steam turbine admission structure.
The utility model discloses a solve the technical scheme that above-mentioned technical problem took and be:
the utility model provides a 3.2MW steam turbine admission structure includes the main steam valve, two governing valves, two nozzles and three actuating mechanism, the main steam valve, the equal rigid coupling of governing valve and nozzle is on the first half of cylinder, the steam inlet end and the steam turbine admission flange joint of main steam valve, two governing valves set up the rear side at the main steam valve side by side, the steam inlet end of governing valve is linked together with the steam exhaust end of main steam valve respectively, be equipped with buffer chamber between the steam exhaust end of main steam valve and the steam inlet end of governing valve, the steam exhaust end and the first nozzle room of one of them governing valve are connected, the steam exhaust end and the second nozzle room of another governing valve are connected, all be connected with the nozzle on first nozzle room and the second nozzle room, main steam valve and two governing valves respectively are connected with an actuating mechanism.
Furthermore, the main steam valve is of an inverted structure, the steam exhaust end of the main steam valve is arranged at the upper part, and the buffer chamber is arranged at the upper part of the main steam valve.
Furthermore, the main steam valve comprises a main steam valve casing, a main steam valve stem, a main steam valve seat, a main steam valve disc nut, a main steam valve sealing sleeve, a main steam valve filter screen, a main steam valve disc sleeve, a main steam valve bonnet, a main steam valve sealing packing and a main steam valve compression sleeve;
the main steam valve casing is fixedly connected with the casing of the upper part of the cylinder, the lower end of the main steam valve casing is fixedly connected with a main steam valve cover, a main steam valve rod is vertically inserted on the main steam valve cover, a main steam valve sealing sleeve, a main steam valve sealing filler and a main steam valve pressing sleeve are sequentially arranged between the main steam valve rod and the main steam valve cover from top to bottom, the upper end surface of the main steam valve pressing sleeve is matched with the lower end of the main steam valve sealing filler, the upper end of the main steam valve rod is arranged in the main steam valve casing, the lower end of the main steam valve rod extends downwards to the outer side of the main steam valve casing and is connected with an actuating mechanism, the main steam valve seat is fixedly connected with the root part of the steam exhaust end in the main steam valve, a main steam valve disc is arranged between the top end of the main steam valve rod and the lower end of the main steam valve seat, the outer circumferential side wall of the top end of the main steam valve disc is matched with the inner circumferential side wall of the valve rod at the lower end of the main steam valve seat, and a main steam valve disc nut is sleeved on the outer side of the upper end of the main steam valve seat, the upper end of main steam valve disk nut and the lower extreme threaded connection of main steam valve disk, the outside from interior to exterior of main steam valve disk nut overlaps in proper order and is equipped with main steam valve disk sleeve and main steam valve filter screen, and main steam valve disk sleeve and main steam valve filter screen rigid coupling are in main steam valve casing.
Furthermore, a main steam valve sliding sleeve is arranged on the inner side of the main steam valve disc nut, the inner side wall of the main steam valve sliding sleeve is in sliding connection with the outer side wall of the main steam valve rod, the outer side wall of the main steam valve disc nut is in sliding connection with the inner side wall of the main steam valve disc sleeve, a main steam valve limiting flange is fixedly connected to the outer circumferential side wall of the top end of the main steam valve rod, and the main steam valve limiting flange is arranged at the upper end of the main steam valve sliding sleeve.
Furthermore, the main steam valve disc sleeve is fixedly connected to the main steam valve cover, and the main steam valve filter screen is fixedly connected between the main steam valve casing and the main steam valve cover.
Furthermore, a main steam valve steam exhaust hole is formed in the middle of the main steam valve seat, an inner arc curved surface is arranged on the inner circumferential side wall of the lower end of the main steam valve steam exhaust hole, an outer arc curved surface is arranged on the outer circumferential side wall of the upper end of the main steam valve disc, and the inner arc curved surface is matched with the outer arc curved surface.
Furthermore, the regulating valve is of a positive structure, the steam exhaust end of the regulating valve is arranged at the lower part, and the first nozzle chamber and the second nozzle chamber are respectively arranged at the lower parts of the corresponding regulating valves.
Furthermore, the regulating valve comprises a regulating valve shell, a regulating valve rod, a regulating valve pressing sleeve, a regulating valve sealing filler, a regulating valve cover, a regulating valve sealing sleeve, a regulating valve disc nut, a regulating valve disc and a regulating valve seat;
the upper end of the regulating valve casing is fixedly connected with a regulating valve cover, the regulating valve rod is vertically inserted on the regulating valve cover, a regulating valve sealing sleeve, a regulating valve sealing filler and a regulating valve pressing sleeve are sequentially arranged between the regulating valve rod and the regulating valve cover from bottom to top, the lower end surface of the regulating valve pressing sleeve is matched with the upper end of the regulating valve sealing filler, the lower end of the regulating valve rod is arranged in the regulating valve casing, the upper end of the regulating valve rod extends upwards to the outer side of the regulating valve casing and is connected with an executing mechanism, the regulating valve seat is fixedly connected at the root of the steam exhaust end in the regulating valve casing, a regulating valve disc is arranged between the lower end of the regulating valve rod and the upper end of the regulating valve seat, the outer circumferential side wall of the lower end of the regulating valve disc is matched with the inner circumferential side wall of the upper end of the regulating valve seat, and a regulating valve disc nut is sleeved on the outer side of the lower end of the regulating valve rod, the adjusting valve disc nut is in threaded connection with the adjusting valve disc, an adjusting valve disc sleeve is sleeved on the outer side of the adjusting valve disc nut, and the adjusting valve disc sleeve is fixedly connected in an adjusting valve casing.
Further, the inboard of governing valve dish nut is equipped with the governing valve sliding sleeve, the inside wall of governing valve sliding sleeve and the lateral wall sliding connection of governing valve rod, the lateral wall of governing valve dish nut and the telescopic inside wall sliding connection of governing valve dish, the rigid coupling has governing valve limit flange on the outer circumference lateral wall of governing valve rod lower extreme, and governing valve limit flange sets up the lower extreme at the governing valve sliding sleeve.
Furthermore, the middle part of the valve seat of the regulating valve is provided with a steam exhaust hole of the regulating valve, the inner circumferential side wall at the upper end of the steam exhaust hole of the regulating valve is provided with an inner inverted conical surface, the outer circumferential side wall at the lower end of the valve disc of the regulating valve is provided with an outer inverted conical surface, and the inner inverted conical surface is matched with the outer inverted conical surface.
Compared with the prior art, the utility model the beneficial effect who contains is:
1. the utility model discloses the valve rod adopts the packing sealed mode, does not produce the valve rod and leaks vapour, reduces leakage loss.
2. The utility model discloses contain 2 governing valves of group, can realize unit sequence valve control, thereby realize the operation valve low pressure loss operation of big opening through controlling two different apertures of valve promptly.
3. The utility model discloses 2 group's governing valve independent control, when one of them valve broke down, can take half load operation and overhaul the trouble on line, and unit maintainability promotes and can effectively reduce the outage rate.
4. The utility model discloses an actuating mechanism control main steam valve and governing valve, control accuracy is high.
Drawings
FIG. 1 is a front view of the overall structure of the present invention;
fig. 2 is a left side view of the overall structure of the present invention;
fig. 3 is an axial sectional view of the overall structure of the present invention;
fig. 4 is a transverse sectional view of the overall structure of the present invention;
fig. 5 is a sectional view of the main steam valve 3 of the present invention;
fig. 6 is a sectional view of the regulating valve 4 of the present invention.
Detailed Description
The first specific implementation way is as follows: the present embodiment is described with reference to fig. 1 to 6, and the 3.2MW steam turbine steam inlet structure in the present embodiment includes a main steam valve 3, two regulating valves 4, two nozzles 9 and three actuators 5, the main steam valve 3, the regulating valves 4 and the nozzles 9 are all fixedly connected to the upper half 2 of the cylinder, the steam inlet end of the main steam valve 3 is connected to the steam inlet flange 1 of the steam turbine, the two regulating valves 4 are arranged in parallel at the rear side of the main steam valve 3, the steam inlet ends of the regulating valves 4 are respectively communicated with the steam outlet end of the main steam valve 3, a buffer chamber 6 is arranged between the steam outlet end of the main steam valve 3 and the steam inlet end of the regulating valves 4, the steam discharging end of one regulating valve 4 is connected with a first nozzle chamber 7, the steam discharging end of the other regulating valve 4 is connected with a second nozzle chamber 8, the first nozzle chamber 7 and the second nozzle chamber 8 are both connected with a nozzle 9, and the main steam valve 3 and the two regulating valves 4 are respectively connected with an actuating mechanism 5.
Main steam valve 3, governing valve 4 are zero leakage seal structure, and two 4 asymmetric arrangements of governing valve wholly arrange partial pressure unit right side (along the through-flow direction), adjust the independent casting of valve casing and weld in cylinder first 2. The main steam valve casing is cast separately and welded with the left side of the regulating valve casing.
The main steam pipeline is connected with a steam inlet flange 1 of the steam turbine through a flange, steam enters a buffer chamber 6 from bottom to top after entering a main steam valve 3, enters an adjusting valve 4 after being buffered, enters a first nozzle chamber 7 and a second nozzle chamber 8 from top to bottom through the adjusting valve 4, and flows through a nozzle 9 and then flows into a through flow for acting.
The actuator 5 is a hydraulically controlled actuator, such as a hydraulic cylinder.
The second embodiment is as follows: the present embodiment will be described with reference to fig. 1 to 6, in which the main steam valve 3 is an inverted structure, the steam discharge end of the main steam valve 3 is disposed at an upper portion, and the buffer chamber 6 is disposed at an upper portion of the main steam valve 3. Other components and connection modes are the same as those of the first embodiment.
The third concrete implementation mode: referring to fig. 1-6 for the description of the present embodiment, the main steam valve 3 of the present embodiment includes a main steam valve housing, a main steam valve stem 10, a main steam valve seat 11, a main steam valve disc 12, a main steam valve disc nut 13, a main steam valve seal sleeve 14, a main steam valve screen 15, a main steam valve disc sleeve 16, a main steam valve cover 17, a main steam valve seal packing 18, and a main steam valve hold-down sleeve 19;
the main steam valve casing is fixedly connected with the casing of the upper half part 2 of the cylinder, the lower end of the main steam valve casing is fixedly connected with a main steam valve cover 17, a main steam valve rod 10 is vertically inserted on the main steam valve cover 17, a main steam valve sealing sleeve 14, a main steam valve sealing filler 18 and a main steam valve pressing sleeve 19 are sequentially arranged between the main steam valve rod 10 and the main steam valve cover 17 from top to bottom, the upper end surface of the main steam valve pressing sleeve 19 is matched with the lower end of the main steam valve sealing filler 18, the upper end of the main steam valve rod 10 is arranged in the main steam valve casing, the lower end of the main steam valve rod 10 extends downwards to the outer side of the main steam valve casing and is connected with an actuating mechanism 5, the main steam valve seat 11 is fixedly connected at the root part of the steam exhaust end in the main steam valve casing, a main steam valve disc 12 is arranged between the top end of the main steam valve rod 10 and the lower end of the main steam valve seat 11, the outer circumferential side wall of the top of the main steam valve disc 12 is matched with the inner circumference side wall of the lower end of the main steam valve seat 11, the outside cover of main steam valve rod 10 upper end is equipped with main steam valve disk nut 13, and the upper end of main steam valve disk nut 13 and the lower extreme threaded connection of main steam valve disk 12, and the outside of main steam valve disk nut 13 is equipped with main steam valve disk sleeve 16 and main steam valve filter screen 15 from interior to exterior in proper order, and main steam valve disk sleeve 16 and main steam valve filter screen 15 rigid coupling are in the main steam valve casing. Other components and connection modes are the same as those of the second embodiment.
In this embodiment, the actuator 5 pulls the main steam valve stem 10, the main steam valve stem 10 is linked with the main steam valve disc 12, the main steam valve disc 12 leaves the main steam valve seat 11, the main steam valve 3 opens the steam turbine to start steam admission, otherwise, the main steam valve closes the steam turbine to stop steam admission. A main steam valve disc sleeve 16 is provided to ensure that the main steam valve disc 12 is aligned with the main steam valve seat 11 and a main steam valve cover 17 is provided to exclude air. The main steam valve sealing sleeve 14 and the main steam valve sealing packing 18 are combined to seal the air contact part of the main steam valve stem 10, and the main steam valve sealing packing 18 is compressed through the main steam valve compression sleeve 19 to play a sealing role.
The main steam valve sealing filler 18 is a graphite composite sealing filler.
And the main steam valve disc nut 13 is fixedly connected with the main steam valve disc 12 through a positioning pin.
The fourth concrete implementation mode: the present embodiment is described with reference to fig. 1 to 6, in the present embodiment, a main steam valve sliding sleeve 13-1 is disposed on an inner side of a main steam valve disc nut 13, an inner side wall of the main steam valve sliding sleeve 13-1 is slidably connected with an outer side wall of a main steam valve stem 10, an outer side wall of the main steam valve disc nut 13 is slidably connected with an inner side wall of a main steam valve disc sleeve 16, a main steam valve limiting flange 10-1 is fixedly connected to an outer circumferential side wall of a top end of the main steam valve stem 10, and the main steam valve limiting flange 10-1 is disposed at an upper end of the main steam valve sliding sleeve 13-1. Other components and connection modes are the same as those of the third embodiment.
The fifth concrete implementation mode: with reference to fig. 1 to 6, the main steam valve disc sleeve 16 of the present embodiment is fixedly connected to a main steam valve cover 17, and the main steam valve strainer 15 is fixedly connected between the main steam valve casing and the main steam valve cover 17. Other components and connection modes are the same as those of the third embodiment.
The sixth specific implementation mode: the present embodiment is described with reference to fig. 1 to 6, in which a main steam valve seat 11 of the present embodiment is provided with a main steam valve exhaust hole 11-1 at a middle portion thereof, an inner circular arc curved surface is provided on an inner circumferential sidewall of a lower end of the main steam valve exhaust hole 11-1, an outer circular arc curved surface is provided on an outer circumferential sidewall of an upper end of a main steam valve disc 12, and the inner circular arc curved surface is matched with the outer circular arc curved surface.
Other components and connection modes are the same as those of the third embodiment.
When the main steam valve 3 is opened, the actuating mechanism 5 pulls the main steam valve rod 10 downwards, the main steam valve rod 10 moves downwards, the main steam valve limiting flange 10-1 pulls the main steam valve disc nut 13 downwards, the main steam valve disc nut 13 drives the main steam valve disc 12 to move downwards, a gap is formed between an outer circular arc curved surface at the upper end of the main steam valve disc 12 and an inner circular arc curved surface at the lower end of the main steam valve steam exhaust hole 11-1, steam enters from the steam inlet end of the main steam valve and is exhausted from the steam exhaust end of the main steam valve through the gap after being filtered by the main steam valve filter screen 15.
When the main steam valve 3 is closed, the actuating mechanism 5 pushes the main steam valve rod 10 upwards, the main steam valve rod 10 moves upwards, the top end of the main steam valve rod 10 pushes the main steam valve disc 12 upwards, the main steam valve disc 12 drives the main steam valve disc nut 13 to move upwards, and an outer circular arc curved surface at the upper end of the main steam valve disc 12 and an inner circular arc curved surface at the lower end of the main steam valve steam exhaust hole 11-1 are closed.
A plurality of guide blocks 29 are uniformly inserted into the main steam valve disc sleeve 16 along the circumferential direction, and the inner side end of each guide block 29 is respectively matched with the outer side wall of the main steam valve disc nut 13, so as to guide the main steam valve disc nut 13.
The main steam valve disc sleeve 16 is provided with a main steam valve disc sleeve through hole at the lower end, the main steam valve disc nut 13 is provided with a main steam valve disc nut through hole, the main steam valve disc 12 is provided with a main steam valve disc through hole at the top end, the main steam valve rod 10 is matched with the main steam valve disc through hole at the lower end, the inner side and the outer side of the main steam valve disc sleeve 16 are communicated with each other, the inner side and the outer side of the main steam valve disc nut 13 are communicated with each other, and the inner side and the outer side of the main steam valve disc 12 are communicated with each other, so that the internal pressure of the main steam valve 3 keeps balance when the main steam valve 3 is opened and closed, and the smooth opening and closing of the main steam valve 3 are ensured.
When the main steam valve 3 is opened, a gap is formed between the top end of the valve rod 10 of the main steam valve and the lower end of the through hole of the valve disc of the main steam valve, and when the main steam valve 3 is closed, the gap is closed between the top end of the valve rod 10 of the main steam valve and the lower end of the through hole of the valve disc of the main steam valve.
The seventh embodiment: the present embodiment will be described with reference to fig. 1 to 6, in which the regulating valve 4 is of a front-mounted structure, the steam discharge end of the regulating valve 4 is provided at the lower portion, and the first nozzle chamber 7 and the second nozzle chamber 8 are provided at the lower portions of the corresponding regulating valves 4. Other components and connection modes are the same as those of the first embodiment.
The specific implementation mode is eight: referring to fig. 1 to 6, the present embodiment is described, and the control valve 4 of the present embodiment includes a control valve housing, a control valve stem 20, a control valve pressing sleeve 21, a control valve packing 22, a control valve cap 23, a control valve sealing sleeve 24, a control valve disc sleeve 25, a control valve disc nut 26, a control valve disc 27, and a control valve seat 28;
the regulating valve casing is fixedly connected with the casing of the upper half part 2 of the cylinder, the upper end of the regulating valve casing is fixedly connected with a regulating valve cover 23, a regulating valve rod 20 is vertically inserted on the regulating valve cover 23, a regulating valve sealing sleeve 24, a regulating valve sealing filler 22 and a regulating valve pressing sleeve 21 are sequentially arranged between the regulating valve rod 20 and the regulating valve cover 23 from bottom to top, the lower end surface of the regulating valve pressing sleeve 21 is matched with the upper end of the regulating valve sealing filler 22, the lower end of the regulating valve rod 20 is arranged in the regulating valve casing, the upper end of the regulating valve rod 20 extends upwards to the outer side of the regulating valve casing and is connected with the actuating mechanism 5, a regulating valve seat 28 is fixedly connected at the root of the steam exhaust end in the regulating valve casing, a regulating valve disc 27 is arranged between the lower end of the regulating valve rod 20 and the upper end of the regulating valve seat 28, the outer circumferential side wall at the lower end of the regulating valve disc 27 is matched with the inner circumferential side wall at the upper end of the regulating valve seat 28, the outside cover of governing valve rod 20 lower extreme is equipped with governing valve disk nut 26, governing valve disk nut 26 and 27 threaded connection of governing valve disk, and governing valve disk nut 26's outside cover is equipped with governing valve disk sleeve 25, and governing valve disk sleeve 25 rigid coupling is in the governing valve casing. The other components and the connection mode are the same as those of the seventh embodiment.
The regulating valve disc sleeve 25 is fixedly connected to the regulating valve cover 23.
The actuator 5 controls the valve rod 20 of the regulating valve to cooperate with the valve disc 27 of the regulating valve to be positioned at different positions with the valve seat 28 of the regulating valve, so that the control of different steam inlet quantities of the steam turbine is realized. The regulator valve disc sleeve 25 is used to ensure that the regulator valve disc 27 is aligned with the regulator valve seat 28 and the regulator valve cover 23 is used to exclude air. The contact part of the regulating valve stem 20 and air is sealed by the combination of the regulating valve sealing sleeve 24 and the regulating valve sealing filler 22, and the regulating valve sealing filler 22 is compressed by the regulating valve pressing sleeve 21 to play a sealing role.
The regulating valve sealing packing 22 is made of graphite composite material.
The regulating valve disc nut 26 is fixedly connected with the regulating valve disc 27 through a positioning pin.
The specific implementation method nine: the present embodiment is described with reference to fig. 1 to fig. 6, in the present embodiment, a regulating valve sliding sleeve 26-1 is disposed on an inner side of a regulating valve disc nut 26, an inner side wall of the regulating valve sliding sleeve 26-1 is slidably connected with an outer side wall of a regulating valve stem 20, an outer side wall of the regulating valve disc nut 26 is slidably connected with an inner side wall of a regulating valve disc sleeve 25, a regulating valve limit flange 20-1 is fixedly connected to an outer circumferential side wall of a lower end of the regulating valve stem 20, and the regulating valve limit flange 20-1 is disposed at a lower end of the regulating valve sliding sleeve 26-1. The other components and connection modes are the same as those of the eighth embodiment.
The detailed implementation mode is ten: the present embodiment is described with reference to fig. 1 to 6, in which the middle of the regulating valve seat 28 of the present embodiment is provided with a regulating valve steam vent 28-1, the inner circumferential sidewall at the upper end of the regulating valve steam vent 28-1 is provided with an inner inverted conical surface, the outer circumferential sidewall at the lower end of the regulating valve disc 27 is provided with an outer inverted conical surface, and the inner inverted conical surface is matched with the outer inverted conical surface. The other components and connection modes are the same as those of the eighth embodiment.
When the regulating valve 4 is opened, the actuating mechanism 5 pulls the regulating valve rod 20 upwards, the regulating valve rod 20 moves upwards, the regulating valve limiting flange 20-1 pulls the regulating valve disc nut 26 upwards, the regulating valve disc nut 26 drives the regulating valve disc 27 to move upwards, a gap is formed between an outer inverted conical surface at the lower end of the regulating valve disc 27 and an inner inverted conical surface at the upper end of the regulating valve steam exhaust hole 28-1, and steam enters from the steam inlet end of the regulating valve and is exhausted from the steam exhaust end of the regulating valve through the gap.
When the regulating valve 4 is closed, the actuating mechanism 5 pushes the regulating valve rod 20 downwards, the regulating valve rod 20 moves downwards, the lower end of the regulating valve rod 20 pushes the regulating valve disk 27 downwards, the regulating valve disk 27 drives the regulating valve disk nut 26 to move downwards, and the outer inverted conical surface at the lower end of the regulating valve disk 27 and the inner inverted conical surface at the upper end of the regulating valve steam exhaust hole 28-1 are closed.
Be equipped with governing valve disc nut through-hole on governing valve disc nut 26, the lower extreme of governing valve disc 27 is equipped with governing valve disc through-hole, and the lower extreme of governing valve rod 20 cooperatees with the upper end of governing valve disc through-hole, and the inside and outside of governing valve disc nut 26 is linked together to this design, and the inside and outside of governing valve disc 27 is linked together, makes governing valve 4 its internal pressure keep balance when opening and closing, guarantees that governing valve 4 realizes the switch smoothly.
When the regulating valve 4 is opened, a gap is formed between the lower end of the regulating valve rod 20 and the upper end of the regulating valve disk through hole, and when the regulating valve 4 is closed, the gap is closed between the lower end of the regulating valve rod 20 and the upper end of the regulating valve disk through hole.
The main steam valve casing, the regulating valve casing and the upper half part 2 of the cylinder are of casting structures and are welded together after casting.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise, and it should be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of features, steps, operations, devices, components, and/or combinations thereof.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the accompanying drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or otherwise described herein. Moreover, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
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 spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a 3.2MW steam turbine admission structure which characterized in that: the steam turbine comprises a main steam valve (3), two regulating valves (4), two nozzles (9) and three actuating mechanisms (5), wherein the main steam valve (3), the regulating valves (4) and the nozzles (9) are fixedly connected on the upper half part (2) of a cylinder, the steam inlet end of the main steam valve (3) is connected with a steam inlet flange (1) of a steam turbine, the two regulating valves (4) are arranged at the rear side of the main steam valve (3) in parallel, the steam inlet ends of the regulating valves (4) are respectively communicated with the steam outlet end of the main steam valve (3), a buffer chamber (6) is arranged between the steam outlet end of the main steam valve (3) and the steam inlet end of the regulating valves (4), the steam exhaust end of one regulating valve (4) is connected with a first nozzle chamber (7), the steam exhaust end of the other regulating valve (4) is connected with a second nozzle chamber (8), the first nozzle chamber (7) and the second nozzle chamber (8) are both connected with a nozzle (9), and a main steam valve (3) and the two regulating valves (4) are respectively connected with an actuating mechanism (5).
2. A 3.2MW steam turbine inlet structure according to claim 1, wherein: the main steam valve (3) is of an inverted structure, the steam exhaust end of the main steam valve (3) is arranged at the upper part, and the buffer chamber (6) is arranged at the upper part of the main steam valve (3).
3. A 3.2MW steam turbine inlet structure according to claim 2, wherein: the main steam valve (3) comprises a main steam valve casing, a main steam valve rod (10), a main steam valve seat (11), a main steam valve disc (12), a main steam valve disc nut (13), a main steam valve sealing sleeve (14), a main steam valve filter screen (15), a main steam valve disc sleeve (16), a main steam valve cover (17), main steam valve sealing packing (18) and a main steam valve compression sleeve (19);
the main steam valve casing is fixedly connected with the casing of the upper half part (2) of the cylinder, the lower end of the main steam valve casing is fixedly connected with a main steam valve cover (17), a main steam valve rod (10) is vertically inserted on the main steam valve cover (17), a main steam valve sealing sleeve (14), a main steam valve sealing filler (18) and a main steam valve pressing sleeve (19) are sequentially arranged between the main steam valve rod (10) and the main steam valve cover (17) from top to bottom, the upper end surface of the main steam valve pressing sleeve (19) is matched with the lower end of the main steam valve sealing filler (18), the upper end of the main steam valve rod (10) is arranged in the main steam valve casing, the lower end of the main steam valve rod (10) extends downwards to the outer side of the main steam valve and is connected with an actuating mechanism (5), the main steam valve casing (11) is fixedly connected at the root of an exhaust end in the main steam valve rod, a main steam valve disk (12) is arranged between the top of the main steam valve (10) and the lower end of the main steam valve seat (11), the outer circumferential side wall of the top end of a main steam valve disc (12) is matched with the inner circumferential side wall of the lower end of a main steam valve seat (11), a main steam valve disc nut (13) is sleeved on the outer side of the upper end of a main steam valve rod (10), the upper end of the main steam valve disc nut (13) is in threaded connection with the lower end of the main steam valve disc (12), a main steam valve disc sleeve (16) and a main steam valve filter screen (15) are sequentially sleeved on the outer side of the main steam valve disc nut (13) from inside to outside, and the main steam valve disc sleeve (16) and the main steam valve filter screen (15) are fixedly connected in a main steam valve casing.
4. A 3.2MW steam turbine inlet structure according to claim 3, wherein: the inner side of the main steam valve disc nut (13) is provided with a main steam valve sliding sleeve (13-1), the inner side wall of the main steam valve sliding sleeve (13-1) is in sliding connection with the outer side wall of a main steam valve rod (10), the outer side wall of the main steam valve disc nut (13) is in sliding connection with the inner side wall of a main steam valve disc sleeve (16), the outer circumferential side wall of the top end of the main steam valve rod (10) is fixedly connected with a main steam valve limiting flange (10-1), and the main steam valve limiting flange (10-1) is arranged at the upper end of the main steam valve sliding sleeve (13-1).
5. A 3.2MW steam turbine inlet structure according to claim 3, wherein: the main steam valve disc sleeve (16) is fixedly connected to the main steam valve cover (17), and the main steam valve filter screen (15) is fixedly connected between the main steam valve casing and the main steam valve cover (17).
6. A 3.2MW steam turbine inlet structure according to claim 3, wherein: the middle part of the main steam valve seat (11) is provided with a main steam valve steam exhaust hole (11-1), the inner circumferential side wall at the lower end of the main steam valve steam exhaust hole (11-1) is provided with an inner arc curved surface, the outer circumferential side wall at the upper end of the main steam valve disc (12) is provided with an outer arc curved surface, and the inner arc curved surface is matched with the outer arc curved surface.
7. A 3.2MW steam turbine inlet structure according to claim 1, wherein: the regulating valve (4) is of a positive structure, the steam exhaust end of the regulating valve (4) is arranged at the lower part, and the first nozzle chamber (7) and the second nozzle chamber (8) are respectively arranged at the lower parts of the corresponding regulating valves (4).
8. The steam inlet structure of a 3.2MW steam turbine according to claim 7, wherein: the regulating valve (4) comprises a regulating valve casing, a regulating valve rod (20), a regulating valve compression sleeve (21), a regulating valve sealing filler (22), a regulating valve cover (23), a regulating valve sealing sleeve (24), a regulating valve disc sleeve (25), a regulating valve disc nut (26), a regulating valve disc (27) and a regulating valve seat (28);
the regulating valve casing is fixedly connected with the casing of the upper half part (2) of the cylinder, the upper end of the regulating valve casing is fixedly connected with a regulating valve cover (23), a regulating valve rod (20) is vertically inserted on the regulating valve cover (23), a regulating valve sealing sleeve (24), a regulating valve sealing filler (22) and a regulating valve pressing sleeve (21) are sequentially arranged between the regulating valve rod (20) and the regulating valve cover (23) from bottom to top, the lower end face of the regulating valve pressing sleeve (21) is matched with the upper end of the regulating valve sealing filler (22), the lower end of the regulating valve rod (20) is arranged in the regulating valve casing, the upper end of the regulating valve rod (20) upwards extends to the outer side of the regulating valve casing and is connected with an actuating mechanism (5), a regulating valve seat (28) is fixedly connected at the root of the steam exhaust end in the regulating valve casing, a regulating valve disc (27) is arranged between the lower end of the regulating valve rod (20) and the upper end of the regulating valve seat (28), the outer circumference lateral wall of governing valve disc (27) lower extreme cooperatees with the interior circumference lateral wall of governing valve disk seat (28) upper end, and governing valve rod (20) outside cover of lower extreme is equipped with governing valve disc nut (26), and governing valve disc nut (26) and governing valve disc (27) threaded connection, and the outside cover of governing valve disc nut (26) is equipped with governing valve disc sleeve (25), and governing valve disc sleeve (25) rigid coupling is in governing valve casing.
9. The steam inlet structure of a 3.2MW steam turbine according to claim 8, wherein: the inner side of the regulating valve disc nut (26) is provided with a regulating valve sliding sleeve (26-1), the inner side wall of the regulating valve sliding sleeve (26-1) is in sliding connection with the outer side wall of the regulating valve rod (20), the outer side wall of the regulating valve disc nut (26) is in sliding connection with the inner side wall of the regulating valve disc sleeve (25), the outer circumferential side wall of the lower end of the regulating valve rod (20) is fixedly connected with a regulating valve limiting flange (20-1), and the regulating valve limiting flange (20-1) is arranged at the lower end of the regulating valve sliding sleeve (26-1).
10. The steam inlet structure of a 3.2MW steam turbine according to claim 8, wherein: the middle part of the regulating valve seat (28) is provided with a regulating valve steam exhaust hole (28-1), the inner circumferential side wall at the upper end of the regulating valve steam exhaust hole (28-1) is provided with an inner inverted conical surface, the outer circumferential side wall at the lower end of the regulating valve disc (27) is provided with an outer inverted conical surface, and the inner inverted conical surface is matched with the outer inverted conical surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221359254.9U CN217270345U (en) | 2022-05-31 | 2022-05-31 | 3.2MW steam turbine admission structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221359254.9U CN217270345U (en) | 2022-05-31 | 2022-05-31 | 3.2MW steam turbine admission structure |
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| Publication Number | Publication Date |
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| CN217270345U true CN217270345U (en) | 2022-08-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202221359254.9U Active CN217270345U (en) | 2022-05-31 | 2022-05-31 | 3.2MW steam turbine admission structure |
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| Country | Link |
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| CN (1) | CN217270345U (en) |
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