Steam turbine valve rod sealing assembly

Abstract

The utility model relates to the technical field of steam turbines, in particular to a steam turbine valve rod sealing assembly which comprises a valve assembly and a connecting cylinder, the connecting cylinder is arranged at the upper end of the valve assembly, second sealing assemblies are arranged on the two sides of the valve assembly, a sealing mechanism is arranged in the valve assembly, and a rubber sleeve is arranged in the sealing mechanism. A sealing ball is arranged at the bottom end of the rubber sleeve, a blocking ball is arranged at the bottom end of the sealing ball, a threaded sleeve is arranged at the lower end of the blocking ball, an anti-skid mechanism is arranged in the connecting cylinder, a first sealing assembly is arranged in the anti-skid mechanism, a fixing sleeve is arranged at the upper end of the first sealing assembly, and a fixing disc is arranged at the upper end of the fixing sleeve.

Description

TECHNICAL FIELD

[0001] The utility model relates to steam turbine technical field, concretely is a steam turbine valve rod sealing assembly. BACKGROUND

[0002] Steam turbine is also called steam turbine engine, is a kind of rotary steam power device, high temperature and high pressure steam passes through fixed nozzle and becomes accelerated airflow and is injected onto blade, makes the rotor with blade row rotates, simultaneously does work to outside, wherein steam turbine needs to control internal pressure by high pressure regulating valve while working, therefore it is particularly important to seal the valve rod of high pressure regulating valve.

[0003] For this, China patent number: CN215568388U discloses a steam turbine high pressure regulating valve valve rod sealing device, including valve body, the top of valve body is equipped with mounting mechanism, the inner top of mounting mechanism is equipped with extrusion mechanism;The utility model discloses a kind of extrusion mechanism, when linkage disc moves, then it will be driven to stretch the telescopic rod of top by connecting block, so that telescopic rod can move along with linkage disc, therefore it can prevent the phenomenon of rotation during the movement of linkage disc, linkage disc can be moved to the position close to sealing ring by connecting rod at this time, so that extrusion plate can extrude sealing ring smoothly, sealing ring will appear the phenomenon of deformation expansion when being extruded, the adhesion between sealing ring and lower valve rod can be more closely by the expansion of sealing ring, thereby the internal pressure of valve body can be greatly reduced to cause sealing ring loose, the phenomenon of air leakage, so that the sealing effect of the valve rod of the device is more outstanding.

[0004] However, the existing steam turbine valve rod sealing assembly, since the valve rod in real life is fixed by thread limiting, there is a certain pressure in the valve assembly, which may be the valve rod upward, and the threads on the valve rod may be worn during long-term use, causing the valve rod to slide, and thus the valve rod is loose, affecting its normal use.

[0005] Therefore, in order to solve the above problems, a steam turbine valve rod sealing assembly is proposed UTILITY MODEL CONTENTS

[0006] The utility model aims at providing a steam turbine valve rod sealing assembly to solve the problem of the existing steam turbine valve rod sealing assembly mentioned in the background art, which is fixed by thread limiting in real life, and there is a certain pressure in the valve assembly, which may be the valve rod upward, and the threads on the valve rod may be worn during long-term use, causing the valve rod to slide, and thus the valve rod is loose, affecting its normal use.

[0007] In order to achieve the above object, the utility model provides the following technical scheme: a valve rod sealing assembly of steam turbine, include: valve assembly and connecting barrel, the upper end of valve assembly is equipped with connecting barrel, both sides of valve assembly are equipped with second sealing assembly, the inside of valve assembly is equipped with sealing mechanism, the inside of sealing mechanism is equipped with rubber cover, the bottom of rubber cover is equipped with sealing ball, the bottom of sealing ball is equipped with blocking ball, and is equipped with the sleeve in the lower end of blocking ball, the inside of connecting barrel is equipped with anti -skidding mechanism, the inside of anti -skidding mechanism is equipped with first sealing assembly, the upper end of first sealing assembly is equipped with fixed sleeve, the upper end of fixed sleeve is equipped with fixed disc.

[0008] Preferably, the upper end of the fixed disc is provided with a rotary disc, one side of the rotary disc is rotatably installed with a valve rod, and the rotary disc is rotatably installed on the valve rod, one end of the valve rod is rotatably installed in the valve assembly.

[0009] Preferably, the fixed sleeve is provided with a sliding rod, one end of the sliding rod is fixedly installed on the fixed disc, and a sliding block is movably installed on the valve rod, and the sliding block is slidably installed on the sliding rod.

[0010] Preferably, one side of the sliding block is fixedly installed with a sliding sleeve, and a support frame is fixedly installed on the fixed sleeve, a rotating shaft is movably installed in the support frame, a threaded rod is movably installed on the rotating shaft, one end of the threaded rod passes through the sliding sleeve, and a nut is movably installed on one end of the threaded rod.

[0011] Preferably, the rubber cover is movably installed on the valve rod, and the rubber cover is attached to the inner wall of the connecting barrel on both sides.

[0012] Preferably, the blocking ball is movably installed on the valve rod, and the blocking ball is movably installed in the valve assembly, the sleeve is fixedly installed in the valve assembly, and one end of the valve rod is threadedly installed in the sleeve.

[0013] Preferably, the first sealing assembly is movably installed on the connecting barrel, the fixed sleeve is fixedly installed on the first sealing assembly, and the fixed disc is fixedly installed on the fixed sleeve.

[0014] Compared with the prior art, the utility model has the advantages that:

[0015] 1. By setting up the anti -skidding mechanism, the valve rod can be reinforced to prevent sliding, the valve rod is driven to rotate by the rotary disc in the mechanism, and the sliding block slides on the valve rod, the sliding block is positioned by the sliding rod, the sliding sleeve is moved by the sliding block, the threaded rod is movable by the rotating shaft in the support frame, one end of the threaded rod passes through the sliding sleeve, the threaded rod is positioned and fixed by the nut, the sliding block is positioned and fixed, the valve rod is reinforced to prevent sliding, and the practicability of the device is improved.

[0016] 2. By setting a sealing mechanism, the connecting cylinder can be sealed by the mechanism, and the valve rod is sealed, and the rubber sleeve in the mechanism is preliminarily sealed, and the sealing ball is secondarily sealed to prevent the connecting cylinder from communicating with the valve assembly, and the process can be blocked by the blocking ball to block the valve assembly, and the valve rod is threaded at one end of the screw sleeve to limit the support of the valve rod, thereby improving the service life of the device. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the description of the embodiments of the present application. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present application and these drawings without creative labor.

[0018] Figure 1 is a structural front view of the utility model;

[0019] Figure 2 is a structural front view of the main body of the utility model;

[0020] Figure 3 is a structural front view of the anti-skid mechanism of the utility model;

[0021] Figure 4 is a structural cross-sectional view of the sealing mechanism of the utility model.

[0022] In the figure: 1, valve assembly; 2, connecting cylinder; 3, anti-skid mechanism; 31, first sealing assembly; 32, fixed sleeve; 33, fixed disc; 34, rotating disc; 35, valve rod; 36, sliding rod; 37, sliding block; 38, sliding sleeve; 39, support frame; 310, rotating shaft; 311, threaded rod; 312, nut; 4, sealing mechanism; 41, rubber sleeve; 42, sealing ball; 43, blocking ball; 44, screw sleeve; 5, second sealing assembly. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0024] Please refer to Figures 1-4 , the present application provides an embodiment:

[0025] The valve assembly 1 used in the present application is a product that can be directly purchased on the market, and its principle and connection mode are all prior art known to those skilled in the art, and thus will not be described here.

[0026] A steam turbine valve rod sealing assembly, comprising a valve assembly 1 and a connecting cylinder 2, the upper end of the valve assembly 1 is provided with the connecting cylinder 2, the two sides of the valve assembly 1 are provided with a second sealing assembly 5, the valve assembly 1 is provided with a sealing mechanism 4, the sealing mechanism 4 is provided with a rubber sleeve 41, the bottom end of the rubber sleeve 41 is provided with a sealing ball 42, the bottom end of the sealing ball 42 is provided with a blocking ball 43, and a screw sleeve 44 is arranged at the lower end of the blocking ball 43, the connecting cylinder 2 is provided with an anti-skid mechanism 3, the anti-skid mechanism 3 is provided with a first sealing assembly 31, the upper end of the first sealing assembly 31 is provided with a fixing sleeve 32, and the upper end of the fixing sleeve 32 is provided with a fixing disc 33, through the sealing mechanism 4, the valve rod 35 in the connecting cylinder 2 can be sealed, and through the anti-skid mechanism 3, the valve rod 35 can be prevented from slipping.

[0027] Further, the upper end of the fixing disc 33 is provided with a rotating disc 34, one side of the rotating disc 34 is rotatably installed with a valve rod 35, the rotating disc 34 is rotatably installed on the valve rod 35, and one end of the valve rod 35 is rotatably installed in the valve assembly 1, through the fixing disc 33, the sliding rod 36 can be fixed, and through the rotating disc 34, the valve rod 35 can be driven to work.

[0028] Further, the fixing sleeve 32 is provided with a sliding rod 36, one end of the sliding rod 36 is fixedly installed on the fixing disc 33, a sliding block 37 is movably installed on the valve rod 35, and the sliding block 37 is slidably installed at both ends of the sliding rod 36, through the sliding rod 36, the sliding block 37 can be limited.

[0029] Further, the sliding block 37 is fixedly installed with a sliding sleeve 38 on one side, a support frame 39 is fixedly installed on the fixing sleeve 32, a rotating shaft 310 is movably installed in the support frame 39, a threaded rod 311 is movably installed on the rotating shaft 310, one end of the threaded rod 311 penetrates through the sliding sleeve 38, and a nut 312 is movably installed at one end of the threaded rod 311, through the sliding block 37, the sliding sleeve 38 can be driven to move, and through the support frame 39, the rotating shaft 310 can be limited and supported.

[0030] The rubber sleeve 41 is movably installed on the valve rod 35, and the two sides of the rubber sleeve 41 are attached to the inner wall of the connecting cylinder 2, the sealing ball 42 is movably installed on the valve rod 35, and the two sides of the sealing ball 42 are attached to the inner wall of the connecting cylinder 2, through the setting of the component, the rubber sleeve 41 can be used for the preliminary sealing of the connecting cylinder 2, and the sealing ball 42 can be used for the secondary sealing of the connecting cylinder 2.

[0031] The blocking ball 43 is movably installed on the valve rod 35, and the blocking ball 43 is movably installed in the valve assembly 1, the screw sleeve 44 is fixedly installed in the valve assembly 1, and one end of the valve rod 35 is screwedly installed in the screw sleeve 44, through the setting of the component, the blocking ball 43 can be used for the blocking work of the valve assembly 1.

[0032] The first sealing assembly 31 is movably installed on the connecting cylinder 2, the fixed sleeve 32 is fixedly installed on the first sealing assembly 31, and the fixed disc 33 is fixedly installed on the fixed sleeve 32, through the setting of the component, the first sealing assembly 31 can be used for the sealing work between the connecting cylinder 2 and the fixed sleeve 32.

[0033] Working principle: when the steam turbine valve rod sealing assembly needs to be used, the sealing mechanism 4 can be used for the sealing work of the connecting cylinder 2 and the valve rod 35, the rubber sleeve 41 in the mechanism is used for the preliminary sealing, the sealing ball 42 is used for the secondary sealing, the connecting cylinder 2 and the valve assembly 1 are communicated, the blocking ball 43 is used for the blocking work of the valve assembly 1, one end of the valve rod 35 is screwedly installed in the screw sleeve 44, the valve rod 35 is limited and supported, the protection mechanism 3 can be used for reinforcing and preventing the valve rod 35 from sliding, the rotating disc 34 in the mechanism drives the valve rod 35 to rotate, and the sliding block 37 slides on the valve rod 35, the sliding block 37 is limited by the sliding rod 36, the sliding sleeve 38 is driven by the sliding block 37 to move, the threaded rod 311 can be moved in the rotating shaft 310 in the supporting frame 39, one end of the threaded rod 311 passes through the sliding sleeve 38, the threaded rod 311 is limited and fixed by the nut 312, the sliding block 37 is limited and fixed, the valve rod 35 is reinforced and prevented from sliding, and the practicability of the device is improved.

[0034] The above merely describes preferred embodiments of the present application, and is not intended to limit the present application in any form; any person skilled in the art can smoothly implement the present application according to the drawings shown in the specification and the above description; however, any person skilled in the art can make slight changes, modifications and equivalent changes of the present application within the scope of the technical scheme of the present application, and the equivalent embodiments of the present application are still within the protection scope of the technical scheme of the present application.

Claims

1. A steam turbine valve stem seal assembly comprising: Valve assembly (1) and connecting cylinder (2), the upper end of the valve assembly (1) is provided with a connecting cylinder (2), and the two sides of the valve assembly (1) are provided with a second sealing assembly (5), characterized in that: the valve assembly (1) is provided with a sealing mechanism (4), the sealing mechanism (4) is provided with a rubber sleeve (41), the bottom end of the rubber sleeve (41) is provided with a sealing ball (42), the bottom end of the sealing ball (42) is provided with a blocking ball (43), and a sleeve (44) is arranged at the lower end of the blocking ball (43), the connecting cylinder (2) is provided with an anti-skid mechanism (3), the anti-skid mechanism (3) is provided with a first sealing assembly (31), the upper end of the first sealing assembly (31) is provided with a fixed sleeve (32), and the upper end of the fixed sleeve (32) is provided with a fixed disc (33).

2. A turbine valve stem seal assembly according to claim 1, wherein: The upper end of the fixed disc (33) is provided with a rotating disc (34), one side of the rotating disc (34) is rotatably provided with a valve rod (35), and the rotating disc (34) is rotatably installed on the valve rod (35), one end of the valve rod (35) is rotatably installed in the valve assembly (1).

3. A turbine valve stem seal assembly according to claim 2, wherein: The fixed sleeve (32) is provided with a sliding rod (36), one end of the sliding rod (36) is fixedly installed on the fixed disc (33), and a sliding block (37) is movably installed on the valve rod (35), and the sliding block (37) is movably installed on the sliding rod (36).

4. A turbine valve stem seal assembly according to claim 3, wherein: The sliding block (37) is fixedly installed on one side of the sliding sleeve (38), and the fixed sleeve (32) is fixedly installed on the support frame (39), the support frame (39) is movably installed on the rotating shaft (310), the rotating shaft (310) is movably installed on the threaded rod (311), one end of the threaded rod (311) penetrates through the sliding sleeve (38), and a nut (312) is movably installed on one end of the threaded rod (311).

5. A turbine valve stem seal assembly as claimed in claim 1, wherein: The rubber sleeve (41) is movably installed on the valve rod (35), and the rubber sleeve (41) is attached to the inner wall of the connecting cylinder (2) on both sides, the sealing ball (42) is movably installed on the valve rod (35), and the sealing ball (42) is attached to the inner wall of the connecting cylinder (2) on both sides.

6. A turbine valve stem seal assembly as claimed in claim 1, wherein: The blocking ball (43) is movably installed on the valve rod (35), and the blocking ball (43) is movably installed in the valve assembly (1), the sleeve (44) is fixedly installed in the valve assembly (1), and one end of the valve rod (35) is threadedly installed in the sleeve (44).

7. A turbine valve stem seal assembly as claimed in claim 1, wherein: The first sealing assembly (31) is movably installed on the connecting cylinder (2), the fixed sleeve (32) is fixedly installed on the first sealing assembly (31), and the fixed disc (33) is fixedly installed on the fixed sleeve (32).

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