High-pressure vertical adjusting valve for million-transformation unit

Abstract

The utility model discloses a high-pressure vertical regulating valve for a million reformed unit. Relates to the field of high-pressure valves. In order to solve the problems that the existing high-pressure regulating valve of the million-grade transformation unit adopts a horizontal valve, the high-pressure regulating valve is horizontally arranged, and slender parts such as a valve rod are easy to bend downwards and deform under the influence of gravity, the utility model provides the high-pressure vertical regulating valve for the million-grade transformation unit. The high-pressure regulating valve comprises a high-pressure regulating valve rod, a regulating valve outer valve cover, a regulating valve shell, a pressing plate, a cover plate, a regulating valve inner valve cover, a hole cover, a regulating valve threaded ring and a lining assembly. The high-pressure adjusting valve rod is inserted into an inserting hole of the high-pressure adjusting valve rod of the lining assembly, the adjusting valve outer valve cover is connected with the adjusting valve shell, the pressing plate is fixedly connected with the cover plate, the pressing plate is arranged on the inner side of the cover plate, and the pressing plate, the cover plate and the adjusting valve inner valve cover are connected to form a clamping groove. The structure can prevent the valve rod and other slender parts from bending downwards and deforming under the influence of gravity. And meanwhile, the requirement for leakproofness of the valve is improved. The high-pressure vertical adjusting valve is applied to the field of high-pressure vertical adjusting valves.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of steam turbine million unit, concretely relates to a high pressure vertical valve for million unit. BACKGROUND

[0002] At present, the high pressure regulating valve of million unit in the market is all horizontal valve. The horizontal arrangement of high pressure regulating valve, the slender parts such as valve stem are easily affected by gravity and produce downward bending deformation, wherein, the valve stem is easily bent mainly because its length-diameter ratio is relatively large. This may cause the valve to close tightly, because the valve stem after downward bending deformation cannot make the valve tightly fit the valve seat. Moreover, this may also affect the flow characteristics of the valve, so that the flow control is not accurate.

[0003] In the horizontal high pressure regulating valve, friction is indeed a key factor affecting the smooth opening and closing of the valve. The opening, closing and valve opening degree adjustment of horizontal high pressure regulating valve need to overcome the friction caused by gravity, and this friction mainly comes from the contact between valve stem and stuffing box, the friction between valve core and valve seat, etc. In high pressure environment, the contact pressure between these components increases, resulting in the corresponding increase of friction. It is not conducive to the rapid opening and closing of the valve, and the sealing performance is also poor. SUMMARY

[0004] The utility model discloses in order to solve the problem that the high pressure regulating valve of million unit in the prior art is all horizontal valve, the horizontal arrangement of high pressure regulating valve, the slender parts such as valve stem are easily affected by gravity and produce downward bending deformation, therefore, provide a high pressure vertical valve for million unit.

[0005] The technical scheme of the utility model is:

[0006] A high pressure vertical valve for million unit, the high pressure vertical valve for million unit includes high pressure regulating valve stem, regulating valve outer valve cover, regulating valve valve shell, pressing plate, cover plate, regulating valve inner valve cover, hole cover, regulating valve screw ring and bushing assembly;

[0007] The high pressure regulating valve stem is inserted into the insertion hole of the high pressure regulating valve stem of the bushing assembly, the regulating valve outer valve cover is fixedly connected with the top end plane of the regulating valve valve shell, and the regulating valve outer valve cover and the regulating valve valve shell are connected as an integral structure, the pressing plate is fixedly connected with the cover plate through the bolt assembly, and the pressing plate is arranged on the inner side of the cover plate, the pressing plate, the cover plate and the regulating valve inner valve cover are connected to form a clamping groove for fixing the bushing assembly, the top end of the bushing assembly is fixed in the clamping groove, the top fixation of the bushing assembly is completed, the regulating valve outer valve cover is fixedly connected with the hole cover through the bolt assembly, the longitudinal plane of the hole cover is attached to the outer annular surface of the regulating valve inner valve cover, and the bushing assembly is inserted into the interior of the regulating valve inner valve cover;

[0008] The cavity structure formed between the outer valve cover of the regulating valve, the valve shell of the regulating valve and the inner valve cover of the regulating valve contains a regulating valve threaded ring, and the regulating valve threaded ring is installed in the cavity and fixed in the cavity through a bolt assembly.

[0009] Further, the bushing assembly comprises a regulating valve rod bushing, a first valve rod bushing, a second valve rod bushing B, a bushing, a sealing bushing and a third valve rod bushing.

[0010] The regulating valve rod bushing, the first valve rod bushing, the second valve rod bushing B, the bushing, the sealing bushing and the third valve rod bushing are sequentially connected from top to bottom and then installed into the inner valve cover of the regulating valve, so that the bushing assembly is installed and fixed.

[0011] Further, the connecting part of the valve shell of the regulating valve and the inner valve cover of the regulating valve forms a transversely arranged annular groove, and a sealing ring is installed in the annular groove, so that the connecting part of the valve shell of the regulating valve and the inner valve cover of the regulating valve is sealed by the sealing ring.

[0012] Further, a groove for installing a threaded ring is formed between the third valve rod bushing of the bushing assembly and the inner valve cover of the regulating valve, and the groove is transversely arranged, and the annular protrusion on the third valve rod bushing of the bushing assembly is clamped into the groove, so that the third valve rod bushing is fixed.

[0013] Further, the pressing plate and the hole cover are flange plates with installation holes.

[0014] Further, an oil driver is installed at the top of the high-pressure regulating valve rod, and the high-pressure regulating valve rod moves upward under the action of the oil driver.

[0015] Further, the oil driver is fixedly connected with the top end of the outer valve cover of the regulating valve through a rib plate.

[0016] Further, the rod surface of the high-pressure regulating valve rod is inserted into the bushing assembly, and the high-pressure regulating valve rod moves vertically up and down in the bushing assembly, thereby driving the valve seat at the bottom of the high-pressure regulating valve rod.

[0017] Further, a rear seat limiting part is formed at the joint of the high-pressure regulating valve rod and the third valve rod bushing of the bushing assembly, and when the high-pressure regulating valve rod stops moving, the valve is in a fully open state.

[0018] Compared with the prior art, the utility model has the following effects:

[0019] The utility model is used to high pressure vertical valve of million transformation unit, and the high pressure vertical valve of million transformation unit can not only avoid the deformation of the valve rod and other slender parts caused by the gravity, but also eliminate the friction caused by the opening, closing and valve opening degree adjustment of the high pressure regulating valve. When the valve is closed, the high pressure regulating valve rod can be better attached to the sealing surface due to the gravity, thereby improving the sealing performance of the high pressure regulating valve. Meanwhile, the high pressure vertical regulating valve has the advantages of quick opening and closing, high precision and good sealing performance.

[0020] The utility model discloses a vertical high pressure regulating valve is optimized from the traditional horizontal high pressure regulating valve. Through the upgrading of the structure of the high pressure regulating valve, the valve rod and other slender parts can be prevented from being deformed due to the gravity, and when the valve is closed, the high pressure regulating valve rod can be better attached to the valve seat due to the gravity, thereby improving the quickness and sealing performance of the valve opening and closing.

[0021] The utility model is used to the function of high pressure vertical valve of million transformation unit is the adjustment of the steam flow into the cylinder. The design of high pressure regulating valve is completely balanced single valve seat valve. The work of oil motor is according to the stroke balance principle. That is, the stroke of oil motor is the function of control oil system pressure. In this way, the force balance of high pressure vertical valve at each position (oil pressure offsets spring force) can be ensured. Oil motor is equipped with an electro-hydraulic transducer, which directly converts electronic signal into oil pressure signal. The high pressure vertical valve will return to the closed position under the action of spring force. When the high pressure vertical valve is in the fully open position, the large flow area reduces the pressure loss of steam inlet. The high pressure regulating valve is provided with a balance hole on the valve disc, thereby reducing the lifting force required to open the high pressure vertical valve during the operation of the unit. The high pressure vertical valve also adopts the rear seat limiting form of the original valve, and self-sealing is formed when the valve is fully open. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is the structure schematic diagram of the utility model;

[0023] Figure 2 It is Figure 1 The partial structure enlarged view of A in

[0024] Figure 3 It is Figure 2 The partial structure enlarged view of B in

[0025] Figure 4 It is Figure 2 The partial structure enlarged view of C in

[0026] Figure 5 It is Figure 2 The partial structure enlarged view of D in

[0027] Figure 6 It is the structure schematic diagram of the bushing assembly.

[0028] Figure 7 is the state diagram of the high-pressure vertical regulating valve when it is opened;

[0029] Figure 8 is the state diagram of the high-pressure vertical regulating valve when it is closed;

[0030] In the figure: 1, high-pressure regulating valve stem, 2, regulating valve outer valve cover, 3, regulating valve valve shell, 4, regulating valve stem bushing, 5, first valve stem bushing, 6, pressing plate, 7, cover plate, 8, second valve stem bushing B, 9, regulating valve inner valve cover, 10, hole cover, 11, bushing, 12, sealing bushing, 13, regulating valve threaded ring, 14, sealing ring, 15, third valve stem bushing, 16, threaded ring, 17, oil motor. DETAILED DESCRIPTION

[0031] To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments will be described clearly and completely below with reference to the drawings in the embodiments of the present application, and the following embodiments are used to explain the present application but not to limit the scope of the present application.

[0032] Specific implementation method one: combined with Figure 1 — Figure 3 The high-pressure vertical regulating valve for a million retrofit unit in the embodiment includes a high-pressure regulating valve stem 1, a regulating valve outer valve cover 2, a regulating valve valve shell 3, a pressing plate 6, a cover plate 7, a regulating valve inner valve cover 9, a hole cover 10, a regulating valve threaded ring 13 and a bushing assembly.

[0033] The high-pressure regulating valve stem 1 is inserted into the insertion hole of the high-pressure regulating valve stem 1 of the bushing assembly, the regulating valve outer valve cover 2 is fixedly connected with the top end plane of the regulating valve valve shell 3, the regulating valve outer valve cover 2 and the regulating valve valve shell 3 are connected as an integral structure, the pressing plate 6 is fixedly connected with the cover plate 7 through a bolt assembly, and the pressing plate 6 is arranged on the inner side of the cover plate 7,

[0034] The pressing plate 6, the cover plate 7 and the regulating valve inner valve cover 9 are connected to form a clamping groove for fixing the bushing assembly,

[0035] The top end of the bushing assembly is fixed in the clamping groove, the top of the bushing assembly is fixed, the regulating valve outer valve cover 2 is fixedly connected with the hole cover 10 through a bolt assembly, the longitudinal plane of the hole cover 10 is attached to the outer annular surface of the regulating valve inner valve cover 9, and the bushing assembly is inserted into the inside of the regulating valve inner valve cover 9.

[0036] The cavity structure is formed between the adjusting valve outer valve cover 2, the adjusting valve valve shell 3 and the adjusting valve inner valve cover 9, and the adjusting valve threaded ring 13 is installed in the cavity, and the adjusting valve threaded ring 13 is fixed in the cavity through a bolt assembly.

[0037] The high-pressure adjusting valve is formed by the high-pressure adjusting valve rod 1, the adjusting valve outer valve cover 2, the adjusting valve valve shell 3, the pressing plate 6, the cover plate 7, the adjusting valve inner valve cover 9, the hole cover 10, the adjusting valve threaded ring 13 and the bushing assembly. The vertical high-pressure adjusting valve not only avoids the bending deformation of the high-pressure adjusting valve rod 1 and other slender parts under the influence of gravity, but also eliminates the frictional resistance generated in the opening and closing process of the high-pressure adjusting valve. At the same time, when the vertical adjusting valve is closed, the high-pressure adjusting valve rod 1 can better adhere to the sealing surface under the action of gravity, thereby improving the sealing performance of the valve. The vertical high-pressure adjusting valve has the advantages of fast opening and closing, high precision and good sealing performance.

[0038] Specific implementation method two: in combination with Figure 4 In this embodiment, a high-pressure vertical adjusting valve for a million retrofit unit is provided, and the bushing assembly includes an adjusting valve rod bushing 4, a first valve rod bushing 5, a second valve rod bushing B8, a bushing 11, a sealing bushing 12 and a third valve rod bushing 15.

[0039] The adjusting valve rod bushing 4, the first valve rod bushing 5, the second valve rod bushing B8, the bushing 11, the sealing bushing 12 and the third valve rod bushing 15 are sequentially connected from top to bottom and then installed into the adjusting valve inner valve cover 9, so as to fix and install the bushing assembly.

[0040] The inner diameters of the adjusting valve rod bushing 4, the first valve rod bushing 5, the second valve rod bushing B8, the bushing 11, the sealing bushing 12 and the third valve rod bushing 15 are the same, so that the high-pressure adjusting valve rod 1 can be inserted into the bushing assembly and vertically slide up and down in the bushing assembly.

[0041] Specific implementation method three: in combination with Figure 5 In this embodiment, a high-pressure vertical adjusting valve for a million retrofit unit is provided, and a horizontal annular groove is formed at the connection between the adjusting valve valve shell 3 and the adjusting valve inner valve cover 9, and a sealing ring 14 is installed in the annular groove to seal the connection between the adjusting valve valve shell 3 and the adjusting valve inner valve cover 9.

[0042] The adjusting valve valve shell 3 and the main valve constitute a valve shell, wherein the adjusting valve valve shell 3 adopts a vertical structure. The vertical structure of the adjusting valve valve shell 3 can avoid the bending deformation of the high-pressure adjusting valve rod 1 and other slender parts under the influence of gravity, and can meet the requirement of improving the valve tightness.

[0043] Specific implementation method four: in combination with Figure 6The third valve rod bushing 15 of the bushing assembly and the inner valve cover 9 of the valve form a groove for installing the threaded ring 16, and the annular protrusion on the third valve rod bushing 15 is clamped into the groove to fix the third valve rod bushing 15.

[0044] The threaded ring 16 is annular, and is connected with the inner valve cover 9 through a threaded structure. After connection, the inner valve cover 9 and the threaded ring 16 form a groove structure, the annular protrusion on the third valve rod bushing 15 is clamped into the groove to limit the third valve rod bushing 15, and the installation of the third valve rod bushing 15 is facilitated.

[0045] Specific embodiment five: Figure 6 The present embodiment is a high-pressure vertical regulating valve for a million retrofit unit. The pressure plate 6 and the hole cover 10 are flange plate structures with mounting holes.

[0046] The horizontal panel surface of the pressure plate 6 is attached to the upper surface of the cover plate 7, and after the mounting hole positions of the pressure plate 6 and the cover plate 7 are matched, the pressure plate 6 and the cover plate 7 are fixedly connected through a bolt assembly. After fixed connection, a groove structure is formed between the pressure plate 6 and the cover plate 7, the valve rod bushing 8 of the bushing assembly is arranged in the groove, thereby limiting the valve rod bushing 8 of the bushing assembly, and the installation of the valve rod bushing 8 of the bushing assembly is completed.

[0047] Specific embodiment six: Figure 6 The present embodiment is a high-pressure vertical regulating valve for a million retrofit unit. The high-pressure regulating valve rod 1 is installed with an oil motor 17 at the top, and the high-pressure regulating valve rod 1 moves upward under the action of the oil motor 17.

[0048] The rod surface of the high-pressure regulating valve rod 1 is inserted into the bushing assembly, and the high-pressure regulating valve rod 1 moves vertically up and down in the bushing assembly, driving the valve seat at the bottom of the high-pressure regulating valve rod 1.

[0049] The oil motor piston is connected with the high-pressure regulating valve rod through a connecting part, and the linear motion of the piston drives the valve rod to move, thereby changing the opening of the high-pressure regulating valve. In this way, the flow of steam and other media can be controlled, and the power, speed and other parameters of the steam turbine and other equipment can be adjusted. For example, when the steam turbine needs to increase power, the oil motor pushes the high-pressure regulating valve rod to increase the valve opening, so that more steam enters the steam turbine, thereby increasing the output power of the steam turbine.

[0050] Specific embodiment seven: Figure 7The oil motor 17 is fixedly connected with the top end of the adjusting valve outer valve cover 2 through the gusset plate.

[0051] The gusset plate is fixedly connected with the adjusting valve outer valve cover 2 through welding at one end, and is fixedly connected with the mounting seat of the oil motor 17 through welding at the other end, thereby supporting the oil motor 17 and enabling the oil motor 17 to drive the high-pressure adjusting valve rod 1 to move.

[0052] Specific embodiment eight: Figure 1 The high-pressure adjusting valve rod 1 is formed with a rear seat limiting portion at the joint with the third valve rod bushing 15 of the bushing assembly, and when the high-pressure adjusting valve rod 1 is moved to stop, the valve is in a fully open state.

[0053] Working principle:

[0054] The high-pressure vertical adjusting valve for the million reconstruction unit is used for adjusting the steam flow entering the cylinder. The high-pressure adjusting valve is designed as a fully balanced single valve seat valve. The oil motor 17 works according to the stroke balance principle. That is, the stroke of the oil motor 17 is a function of the control oil system pressure. In this way, the force balance of the high-pressure vertical adjusting valve at each position (the oil pressure offsets the spring force) can be ensured. The oil motor 17 is provided with an electro-hydraulic converter for directly converting an electronic signal into an oil pressure signal. The high-pressure vertical adjusting valve returns to the closed position under the action of the spring force. When the high-pressure vertical adjusting valve is in the fully open position, the large flow area reduces the inlet steam pressure loss. The high-pressure adjusting valve is provided with a balance hole on the valve disc, thereby reducing the lifting force required to open the high-pressure vertical adjusting valve during unit operation. The high-pressure vertical adjusting valve also adopts the rear seat limiting form of the original valve, and also forms a self-sealing when the valve is fully open.

[0055] The above is only a preferred embodiment of the present application, and does not limit the present application in any form. Although the present application has been disclosed as above with reference to the preferred embodiment, it is not intended to limit the present application. Any person skilled in the art can make some changes or modifications to the above disclosed technical content without departing from the technical solution of the present application, and the equivalent embodiments with equivalent changes are equivalent to the above embodiments. Any simple modification, equivalent replacement and improvement of the above embodiments, which does not depart from the technical solution of the present application, is within the protection scope of the present application.

Claims

1. A high pressure vertical control valve for a million retrofit unit, characterized in that, The high-pressure vertical regulating valve for the million reconstruction unit comprises a high-pressure regulating valve rod (1), a regulating valve outer valve cover (2), a regulating valve valve shell (3), a pressing plate (6), a cover plate (7), a regulating valve inner valve cover (9), a hole cover (10), a regulating valve threaded ring (13) and a bushing assembly; The high-pressure regulating valve rod (1) is inserted into the insertion hole of the high-pressure regulating valve rod (1) of the bushing assembly, the regulating valve outer valve cover (2) is fixedly connected with the top end plane of the regulating valve valve shell (3), the regulating valve outer valve cover (2) and the regulating valve valve shell (3) are connected into an integrated structure, the pressing plate (6) is fixedly connected with the cover plate (7) through a bolt assembly, and the pressing plate (6) is arranged on the inner side of the cover plate (7), The pressing plate (6), the cover plate (7) and the regulating valve inner valve cover (9) are connected to form a clamping groove for fixing the bushing assembly, the top end of the bushing assembly is fixed in the clamping groove, the top fixing of the bushing assembly is completed, the regulating valve outer valve cover (2) is fixedly connected with the hole cover (10) through a bolt assembly, the longitudinal plane of the hole cover (10) is attached to the outer side annular surface of the regulating valve inner valve cover (9), and the bushing assembly is inserted into the inside of the regulating valve inner valve cover (9); The regulating valve outer valve cover (2), the regulating valve valve shell (3) and the regulating valve inner valve cover (9) form a cavity structure containing the regulating valve threaded ring (13), the regulating valve threaded ring (13) is installed in the cavity, and the regulating valve threaded ring (13) is fixed in the cavity through a bolt assembly.

2. The high pressure vertical control valve for a million retrofit unit according to claim 1, characterized by, The bushing assembly comprises a regulating valve rod bushing (4), a first valve rod bushing (5), a second valve rod bushing B (8), a bushing (11), a sealing bushing (12) and a third valve rod bushing (15); The regulating valve rod bushing (4), the first valve rod bushing (5), the second valve rod bushing B (8), the bushing (11), the sealing bushing (12) and the third valve rod bushing (15) are sequentially arranged from top to bottom and are installed into the regulating valve inner valve cover (9), so that the bushing assembly is fixed.

3. The high pressure vertical control valve for a million retrofit unit according to claim 2, characterized by, The connection between the regulating valve valve shell (3) and the regulating valve inner valve cover (9) forms a transversely arranged annular groove, and a sealing ring (14) is installed in the annular groove, so that the connection between the regulating valve valve shell (3) and the regulating valve inner valve cover (9) is sealed.

4. The high pressure vertical control valve for a million retrofit unit according to claim 2, characterized by, The third valve rod bushing (15) of the bushing assembly and the regulating valve inner valve cover (9) form a groove body for installing a threaded ring (16), and the groove body is transversely arranged, and the annular protrusion on the third valve rod bushing (15) of the bushing assembly is clamped into the groove body, so that the third valve rod bushing (15) is fixed.

5. The high pressure vertical control valve for a million retrofit unit according to claim 1, characterized by, The pressing plate (6) and the hole cover (10) are flange plate structures with mounting holes.

6. The high pressure vertical control valve for a million retrofit unit according to claim 1, characterized by, The high-pressure regulating valve rod (1) is provided with an oil motor (17) at the top, and the high-pressure regulating valve rod (1) moves upward under the action of the oil motor (17).

7. The high pressure vertical control valve for a million retrofit unit according to claim 6, characterized by, The oil motor (17) is fixedly connected with the top end of the regulating valve outer valve cover (2) through a rib plate.

8. The high pressure vertical control valve for a million retrofit unit according to claim 6, characterized by, The rod surface of the high-pressure regulating valve rod (1) is inserted into the bushing assembly, and the high-pressure regulating valve rod (1) moves vertically up and down in the bushing assembly, thereby driving the valve seat at the bottom of the high-pressure regulating valve rod (1).

9. The high pressure vertical control valve for a million retrofit unit according to claim 8, characterized by, The high-pressure regulating valve stem (1) and the third valve stem bushing (15) of the bushing assembly form a backseat limit, and when the high-pressure regulating valve stem (1) moves to stop, the valve is in a fully open state.

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