CN210088006U

CN210088006U - Steam turbine controllable valve opening steam inlet valve

Info

Publication number: CN210088006U
Application number: CN201920600387.2U
Authority: CN
Inventors: 李明; 葛朋; 陈辞
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-04-29
Filing date: 2019-04-29
Publication date: 2020-02-18
Anticipated expiration: 2029-04-29

Abstract

The utility model discloses a steerable valve aperture admission valve of steam turbine, including disk seat, valve pocket, valve rod, elasticity preforming and valve top, the inside of disk seat is provided with the valve pocket, and is provided with logical steam port on the inner wall of valve pocket, and leads to the inside case that is provided with of valve pocket of steam port below, be provided with the steam inlet on the disk seat outer wall of valve pocket one side, and the valve pocket keeps away from and be provided with out the steam port on the disk seat outer wall of steam port one side, be fixed with the reinforcing plate on the inside wall of valve pocket, the top of disk seat is fixed with the seal, and the top of seal is fixed with the stroke casing, the inside central point of putting of seal department is provided with the valve rod, and the top of valve rod extends to the inside of stroke casing. The utility model discloses not only accomplish the control aperture function of valve, improved the leakproofness when admission valve uses, improved the compressive property when admission valve uses moreover.

Description

Steam turbine controllable valve opening steam inlet valve

Technical Field

The utility model relates to an admission valve technical field specifically is a steerable valve aperture admission valve of steam turbine.

Background

A steam turbine is a machine for capturing kinetic energy of steam (formed by heating water) and converting the kinetic energy into kinetic energy of turbine rotation, and is particularly suitable for thermal power generation and nuclear power generation and widely applied to chemical engineering.

The existing steam inlet valves on the market are various in types, can basically meet the use requirements of people, but still have certain defects, and have the following specific problems.

1. When the traditional steam inlet valve is used, the opening degree of steam inlet is usually difficult to control, so that the diversified use of the steam inlet valve is not facilitated;

2. when the traditional steam inlet valve is used, the sealing performance is poor, and the steam leakage is easy to occur, so that certain potential safety hazards exist;

3. when the traditional steam inlet valve is used, the steam is easy to lose heat in the steam conveying process, and the steam inlet valve is easy to be worn to a certain extent by pressure.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a steerable valve aperture admission valve of steam turbine to steam delivery aperture is difficult to control when providing the admission valve use in solving above-mentioned background art, and the leakproofness is not good and the not good problem of compressive property.

In order to achieve the above object, the utility model provides a following technical scheme: a steam inlet valve with controllable valve opening of a steam turbine comprises a valve seat, a valve cavity, a valve rod, an elastic pressing sheet and a valve top, wherein the valve cavity is arranged inside the valve seat, a steam inlet is formed in the inner wall of the valve cavity, a valve core is arranged inside the valve cavity below the steam inlet, a steam inlet is formed in the outer wall of the valve seat on one side of the valve cavity, a steam outlet is formed in the outer wall of the valve seat on the side, away from the steam inlet, of the valve cavity, a reinforcing plate is fixed on the inner side wall of the valve cavity, a sealing body is fixed at the top end of the valve seat, a stroke shell is fixed at the top end of the sealing body, the valve rod is arranged in the center of the sealing body, the top end of the valve rod extends into the valve cavity and is fixedly connected with the valve core, a stroke pointer extends into the stroke shell and, the sealing body of valve rod both sides is inside all to be filled has the sealing filler, the top welding of stroke casing has the valve top, and the inside of valve top is provided with the push rod, the bottom of push rod extend to the inside of stroke casing and with the top fixed connection of valve rod, the cover is equipped with sticiss the spring on the outer wall of push rod, and the top of push rod is fixed with the kicking block to all be provided with the draw-in groove on the valve top inner wall of kicking block both sides, the top of valve top is provided with regulation and control mechanism.

Preferably, regulation and control mechanism has set gradually the carousel from last to down, the hinge bar, the fixed plate, the commentaries on classics strip, the head rod, the second connecting rod, the third connecting rod, spout and rotary tank, the top of valve top is fixed with the fixed plate, and be provided with the rotary tank on the outer wall of fixed plate one side, and the inside of rotary tank articulates through the hinge bar has the carousel, it has the commentaries on classics strip to articulate on the outer wall of carousel one side, be provided with the spout on the fixed plate outer wall of carousel below, and the inside of spout is provided with the head rod, the head rod is articulated mutually with the commentaries on classics strip, the bottom threaded connection of head rod has the second connecting rod, and the bottom threaded connection of second connecting rod has the third connecting rod, the hinge bar.

Preferably, the two ends of the top block are both fixed with elastic pressing sheets, and the two ends of the elastic pressing sheets extend into the clamping grooves.

Preferably, the top of valve top is provided with the action bars, action bars and hinge bar fixed connection, and the cover is equipped with the loop bar on the outer wall of valve top, and the loop bar is mutually supported with the spacing groove.

Preferably, be fixed with the stripper plate on the inside valve rod outer wall of seal, and the bottom of stripper plate all installs expanding spring to be fixed with the boss on the valve rod outer wall of expanding spring bottom.

Preferably, the outer wall of one side of the reinforcing plate is fixed with chromium carbide, and the outer wall of the chromium carbide far away from the reinforcing plate is coated with nano zirconia.

Preferably, the sealing body bottom of boss below is fixed with the concave station, and the both sides of boss bottom all are provided with the rubber pearl, and the rubber pearl is mutually supported with the concave station.

Compared with the prior art, the beneficial effects of the utility model are that: the steam turbine can control the valve opening degree of the steam inlet valve, not only can complete the function of controlling the valve opening degree, improve the sealing performance of the steam inlet valve during use, but also improve the pressure resistance of the steam inlet valve during use;

1. the rotary disc drives the rotating strip to rotate, so that the first connecting rod slides back and forth in the sliding groove, the third connecting rod pushes the jacking block to move up and down, the valve core moves up and down in the valve cavity, the descending degree is adjusted by disassembling and assembling the second connecting rod, and the third connecting rod is clamped with the limiting groove by sliding the sleeve rod, so that the opening control function of the valve is completed;

2. the rubber bead, the extrusion plate, the telescopic spring, the boss and the concave table are arranged, the extrusion plate is acted on in the process of the downward pressing movement of the valve rod to press the valve rod downward, and the boss is pushed to move downward under the elastic action of the telescopic spring, so that the rubber bead is tightly attached to the concave table, steam is prevented from entering the inside of the sealing body, and the sealing performance of the steam inlet valve in use is improved;

3. through being provided with spacing groove, loop bar and reinforcing plate, the reinforcing plate has improved the inside compressive strength of disk seat, and chromium carbide has improved the inside degree of wear of disk seat simultaneously, has alleviateed the inside degree of wear of disk seat, and nanometer zirconia has improved the inside thermal insulation performance of disk seat, thermal scattering and disappearing when having avoided steam transportation to the compressive property when inlet valve uses has been improved.

Drawings

Fig. 1 is a schematic view of the structure of the present invention;

FIG. 2 is an enlarged schematic view of the regulating mechanism of the present invention;

FIG. 3 is a side view of the adjusting mechanism of the present invention;

fig. 4 is an enlarged schematic structural view of a point a in fig. 1 according to the present invention;

fig. 5 is a schematic view of the sectional structure of the reinforcing plate of the present invention.

In the figure: 1. a valve seat; 2. a steam inlet; 3. a valve core; 4. a valve cavity; 5. a steam inlet; 6. a valve stem; 7. A trip pointer; 8. stroke scales; 9. a push rod; 10. a card slot; 11. elastic tabletting; 12. a regulating mechanism; 1201. a turntable; 1202. a hinged lever; 1203. a fixing plate; 1204. strip turning; 1205. a first connecting rod; 1206. a second connecting rod; 1207. a third connecting rod; 1208. a chute; 1209. rotating the groove; 13. an operating lever; 14. a top block; 15. a valve top; 16. a compression spring; 17. a stroke housing; 18. a seal body; 19. sealing and filling; 20. a steam outlet; 21. a limiting groove; 22. a loop bar; 23. a reinforcing plate; 24. Rubber beads; 25. a pressing plate; 26. a tension spring; 27. a boss; 28. a concave platform; 29. nano zirconia; 30. and (5) chromium carbide.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-5, the present invention provides an embodiment: a steam turbine controllable valve opening steam inlet valve comprises a valve seat 1, a valve cavity 4, a valve rod 6, an elastic pressing sheet 11 and a valve top 15, wherein the valve cavity 4 is arranged inside the valve seat 1, a steam inlet 2 is arranged on the inner wall of the valve cavity 4, a valve core 3 is arranged inside the valve cavity 4 below the steam inlet 2, a steam inlet 5 is arranged on the outer wall of the valve seat 1 on one side of the valve cavity 4, a steam outlet 20 is arranged on the outer wall of the valve seat 1 on one side, far away from the steam inlet 5, of the valve cavity 4, a reinforcing plate 23 is fixed on the inner side wall of the valve cavity 4, chromium carbide 30 is fixed on the outer wall on one side of the reinforcing plate 23, nano zirconium oxide 29 is coated on the outer wall of one side, far away from the reinforcing plate 23, of the chromium carbide 30 for improving the compressive strength of the valve seat 1, a sealing body 18 is fixed at;

an extrusion plate 25 is fixed on the outer wall of the valve rod 6 in the sealing body 18, the bottom ends of the extrusion plate 25 are all provided with a telescopic spring 26, a boss 27 is fixed on the outer wall of the valve rod 6 at the bottom end of the telescopic spring 26 and used for assisting the extrusion work of the boss 27, a concave platform 28 is fixed at the bottom of the sealing body 18 below the boss 27, rubber beads 24 are arranged on two sides of the bottom end of the boss 27, and the rubber beads 24 are matched with the concave platform 28 to improve the sealing property in the valve seat 1;

a valve rod 6 is arranged at the center position inside the sealing body 18, the top end of the valve rod 6 extends into the valve cavity 4 and is fixedly connected with the valve core 3, the top end of the valve rod 6 extends into the stroke shell 17 and is sleeved with a stroke pointer 7, stroke scales 8 are arranged on the inner wall of the stroke shell 17 on one side of the stroke pointer 7, sealing fillers 19 are filled inside the sealing bodies 18 on the two sides of the valve rod 6, a valve top 15 is welded at the top end of the stroke shell 17, and a push rod 9 is arranged inside the valve top 15;

an operating rod 13 is arranged above the valve top 15, the operating rod 13 is fixedly connected with the hinged rod 1202, a loop rod 22 is sleeved on the outer wall of the valve top 15, the loop rod 22 is matched with a limiting groove 21 and used for driving the rotary table 1201 to rotate and limiting the loop rod 22, the bottom end of the push rod 9 extends into the stroke shell 17 and is fixedly connected with the top end of the valve rod 6, a compression spring 16 is sleeved on the outer wall of the push rod 9, a top block 14 is fixed at the top end of the push rod 9, clamping grooves 10 are formed in the inner walls of the valve top 15 on two sides of the top block 14, elastic pressing sheets 11 are fixed at two ends of the top block 14, two ends of each elastic pressing sheet 11 extend into the clamping grooves 10 and are used for assisting pressing down, and a regulating mechanism 12 is arranged at the top end of the valve top 15;

the regulating mechanism 12 is sequentially provided with a rotary disc 1201, a hinged rod 1202, a fixed plate 1203, a rotating strip 1204, a first connecting rod 1205, a second connecting rod 1206, a third connecting rod 1207, a sliding groove 1208 and a rotating groove 1209 from top to bottom, the top end of the valve top 15 is fixed with the fixed plate 1203, the outer wall of one side of the fixed plate 1203 is provided with the rotating groove 1209, the inside of the rotating groove 1209 is hinged with the rotary disc 1201 through the hinged rod 1202, the outer wall of one side of the rotary disc 1201 is hinged with the rotating strip 1204, the outer wall of the fixed plate 1203 below the rotary disc 1201 is provided with the sliding groove 1208, the inside of the sliding groove 1208 is provided with the first connecting rod 1205, the first connecting rod 1205 is hinged with the rotating strip 1204, the bottom end of the first connecting rod 1205 is in threaded connection with the second connecting rod 1206, the bottom end of the second connecting rod 1206 is in threaded connection with;

the staff makes the carousel 1201 rotate through manual rotation action pole 13, make the carousel 1201 rotate, it is rotatory to drive commentaries on classics strip 1204 under the rotation effect of carousel 1201, thereby drive head rod 1205 and make it make its inside round trip to slide at spout 1208, third connecting rod 1207 pushes away kicking block 14 and make its up-and-down motion, make case 3 up-and-down motion in the inside of valve pocket 4, when valve rod 6 pushes down, case 3 breaks away from logical steam port 2, at this moment, steam passes disk seat 1 and accomplishes steam transmission work, when valve rod 6 rose, case 3 was located logical steam port 2's inside, make disk seat 1 inside be in the encapsulated situation, consequently, steam can't be carried, simultaneously, staff's accessible dismouting second connecting rod 1206 adjusts the degree that descends, and make it block each other with spacing groove 21 through slip loop bar 22, accomplish the control aperture function of valve.

The working principle is as follows: when the steam valve is used, a worker firstly communicates the steam inlet pipe and the steam outlet pipe with the steam inlet 5 and the steam outlet 20, in the steam conveying process, the worker manually rotates the operating rod 13 to rotate the rotary disc 1201, the rotary bar 1204 is driven to rotate under the rotating action of the rotary disc 1201, so that the first connecting rod 1205 is driven to slide back and forth in the sliding groove 1208, the third connecting rod 1207 pushes the ejector block 14 to move up and down, so that the valve core 3 moves up and down in the valve cavity 4, when the valve rod 6 is pressed down, the valve core 3 is separated from the steam inlet 2, at the moment, steam passes through the valve seat 1 to finish the steam conveying work, when the valve rod 6 rises, the valve core 3 is positioned in the steam inlet 2, so that the inside of the valve seat 1 is in a closed state, therefore, the steam cannot be conveyed, meanwhile, the worker can adjust the descending degree by disassembling and assembling the second connecting rod 1206, and the steam sleeve rod 22 is clamped with the limiting groove 21, the function of controlling the opening degree of the valve is completed, then, in the process of the downward pressing movement of the valve rod 6, the valve rod 6 acts on the extrusion plate 25 to press the extrusion plate downward, at the moment, under the elastic action of the extension spring 26, the boss 27 is pushed to move downward, the rubber bead 24 is tightly attached to the concave platform 28, the top of the valve cavity 4 is in a sealing state when the steam inlet 2 is opened, thereby preventing steam from entering the sealing body 18, improving the sealing performance of the valve seat 1 during use, and finally, in the use process of the steam inlet valve, the reinforcing plate 23 improves the compressive strength inside the valve seat 1, the chromium carbide 30 improves the wear resistance inside the valve seat 1, reduces the wear degree inside the valve seat 1, the nano zirconia 29 improves the heat preservation performance inside the valve seat 1, avoids heat loss during steam transportation, therefore, the pressure resistance of the steam inlet valve in use is improved, and the work of the steam inlet valve with the controllable valve opening of the steam turbine is completed.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a controllable valve opening admission valve of steam turbine, includes disk seat (1), valve pocket (4), valve rod (6), elasticity preforming (11) and valve top (15), its characterized in that: the steam valve is characterized in that a valve cavity (4) is arranged inside the valve seat (1), a steam inlet (2) is arranged on the inner wall of the valve cavity (4), a valve core (3) is arranged inside the valve cavity (4) below the steam inlet (2), a steam inlet (5) is arranged on the outer wall of the valve seat (1) on one side of the valve cavity (4), a steam outlet (20) is arranged on the outer wall of the valve seat (1) on one side of the valve cavity (4) far away from the steam inlet (5), a reinforcing plate (23) is fixed on the inner side wall of the valve cavity (4), a sealing body (18) is fixed at the top end of the valve seat (1), a stroke shell (17) is fixed at the top end of the sealing body (18), a valve rod (6) is arranged at the central position inside the sealing body (18), the top end of the valve rod (6) extends to the inside of the valve cavity (4) and is fixedly connected with the valve core (3), a stroke pointer (7), be provided with stroke scale (8) on stroke casing (17) inner wall of stroke pointer (7) one side, sealing filler (19) all have been filled to sealing body (18) inside of valve rod (6) both sides, the top welding of stroke casing (17) has valve top (15), and the inside of valve top (15) is provided with push rod (9), the bottom of push rod (9) extend to the inside of stroke casing (17) and with the top fixed connection of valve rod (6), the cover is equipped with compressing spring (16) on the outer wall of push rod (9), and the top of push rod (9) is fixed with kicking block (14) to all be provided with draw-in groove (10) on valve top (15) inner wall of kicking block (14) both sides, the top of valve top (15) is provided with regulation and control mechanism (12).

2. The steam turbine controllable valve opening admission valve of claim 1, wherein: the regulating mechanism (12) is sequentially provided with a rotary plate (1201), a hinge rod (1202), a fixed plate (1203), a rotating strip (1204), a first connecting rod (1205), a second connecting rod (1206), a third connecting rod (1207), a sliding chute (1208) and a rotating chute (1209) from top to bottom, the top end of the valve top (15) is fixed with the fixed plate (1203), the rotating chute (1209) is arranged on the outer wall of one side of the fixed plate (1203), the rotating strip (1204) is hinged inside the rotating chute (1209) through the hinge rod (1202), the rotating strip (1204) is hinged on the outer wall of one side of the rotary plate (1201), the sliding chute (1208) is arranged on the outer wall of the fixed plate (1203) below the rotary plate (1201), the first connecting rod (1205) is arranged inside the sliding chute (1208), the first connecting rod (1205) is hinged with the rotating strip (1204), the bottom end of the first connecting rod (1205) is in threaded connection with the, and the bottom end of the second connecting rod (1206) is in threaded connection with a third connecting rod (1207), and a limiting groove (21) is fixed on the outer wall of one side, far away from the turntable (1201), of the hinged rod (1202).

3. The steam turbine controllable valve opening admission valve of claim 1, wherein: both ends of the top block (14) are fixed with elastic pressing sheets (11), and both ends of the elastic pressing sheets (11) extend into the clamping groove (10).

4. The steam turbine controllable valve opening admission valve of claim 1, wherein: an operating rod (13) is arranged above the valve top (15), the operating rod (13) is fixedly connected with the hinged rod (1202), a sleeve rod (22) is sleeved on the outer wall of the valve top (15), and the sleeve rod (22) is matched with the limiting groove (21).

5. The steam turbine controllable valve opening admission valve of claim 1, wherein: be fixed with stripper plate (25) on valve rod (6) outer wall inside seal body (18), and telescopic spring (26) are all installed to the bottom of stripper plate (25) to be fixed with boss (27) on valve rod (6) outer wall at telescopic spring (26) bottom.

6. The steam turbine controllable valve opening admission valve of claim 1, wherein: the outer wall of one side of the reinforcing plate (23) is fixed with chromium carbide (30), and the outer wall of one side of the chromium carbide (30) far away from the reinforcing plate (23) is coated with nano zirconia (29).

7. The steam turbine controllable valve opening admission valve of claim 5, wherein: the sealing body (18) bottom of boss (27) below is fixed with concave station (28), and the both sides of boss (27) bottom all are provided with rubber pearl (24), and rubber pearl (24) and concave station (28) are mutually supported.