A water seal cylinder device for a thermal power steam turbine
By designing a combination of inverted U-shaped structure float and plug-in in the water sealing device of the thermal power generator, intermittent hydrophobicity of the incoming water of the steam engine is achieved, the problem of float instability caused by water pressure fluctuations is solved, and the safe and stable operation of the device is ensured.
Patent Information
- Application Number
- CN202420664968.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-02
- Publication Date
- 2025-04-08
- Estimated Expiration
- 2034-04-02
AI Technical Summary
The existing water-sealed float hydrophobic structure can easily cause the hollow float to open or close for a long time when the water pressure fluctuates, causing damage to the device.
A thermal power generator water sealing device is designed, including a cylinder and a sliding float. The bottom of the float is an inverted U-shaped structure and is equipped with an elastic member. The top of the float is equipped with a plug and a port. Intermittent hydrophobicity is achieved through the reciprocating movement of the float between the high and low positions.
The device can stably and safely adapt to the pressure fluctuations of the steam engine water, ensure intermittent opening or closing of the hydrophobic path, avoid the violent floating of the float when the water pressure fluctuates, and extend the service life of the device.
Smart Images
Figure CN222731602U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of steam turbine water seal drain devices and relates to a water seal cylinder device for a thermal power generation steam turbine. Background Art
[0002] In order to ensure the normal and safe operation of the steam turbine in a thermal power plant, it is necessary to drain the steam turbine in time, and the float drain structure is one of the commonly used drain methods for steam turbines. The water seal float drain structure is to set a hollow float in the drain cavity. When the water generated by the steam turbine enters the drain cavity to drive the hollow float to float, the floating of the hollow float controls the on and off of the drain passage.
[0003] However, due to the light mass of the hollow float itself, it floats up and down with the water pressure fluctuations entering the drain chamber. Once the water pressure fluctuates, the hollow float will float up and down, and the hollow float will open or close the drain passage for a long time, eventually causing damage to the water seal drain device.
[0004] Therefore, in view of the above-mentioned defects of the existing water seal float drainage structure, the utility model discloses a thermal power steam turbine water seal cylinder device. Utility Model Content
[0005] The utility model aims to provide a water seal cylinder device for a thermal power steam turbine, which can adapt to the pressure fluctuation of the steam turbine water, stably and safely open or close the drainage passage intermittently, and thus ensure safe and stable drainage of the steam turbine.
[0006] The utility model is realized by the following technical solutions:
[0007] A water seal cylinder device for a thermal power steam turbine comprises a cylinder and a float slidably arranged inside the cylinder, wherein an inlet is arranged at the bottom of the cylinder, an outlet is arranged at the top of the cylinder, the bottom of the float is an inverted U-shaped structure, an elastic member is arranged between the inverted U-shaped structure and the inlet; a plug is arranged at the top of the float corresponding to the outlet, and the plug is slidably connected to the outlet; a plurality of through openings are arranged between the top and bottom of the float.
[0008] When the steam turbine water just enters the cylinder through the inlet at the bottom of the cylinder, the buoyancy of the water on the float is not enough to overcome the gravity of the float and the elastic force of the elastic part, so that the water accumulates at the bottom of the cylinder to form a water seal structure. At this time, the float is in a low position, so that the plug on the top of the float does not extend to the outlet, that is, the outlet is in an open state, and the water flows to the outlet through the opening on the float and the gap between the float and the cylinder for drainage.
[0009] As the amount of incoming water increases, the buoyancy of the inverted U-shaped structure at the bottom of the float increases. When the buoyancy overcomes the gravity of the float and the elastic force of the elastic member, it drives the float upward to a high position, and then drives the plug at the top of the float into the outlet. At this time, the outlet is blocked and the drainage stops. Part of the incoming water flows to the top of the float through the opening on the float and the gap between the float and the cylinder, thereby reducing the buoyancy of the bottom of the float to a level that cannot overcome the gravity of the float and the elastic force of the elastic member. At this time, the float moves downward to a low position, driving the plug out of the outlet, and the outlet is reopened for drainage. The reciprocating movement of the float between the high and low positions can achieve intermittent drainage operations.
[0010] In order to better implement the utility model, further, a plug is hingedly connected to the top of the float corresponding to the through port, a support arm is arranged at one end of the plug, and a stopper is arranged on the inner wall of the cylinder corresponding to the support arm.
[0011] In order to better implement the utility model, further, the shape of the through opening is arc-shaped, and the shape of the plug is adapted to the shape of the through opening.
[0012] In order to better realize the utility model, further, an input pipe is arranged inside the inlet, a limiting flange is arranged on the inner wall of the cylinder corresponding to the bottom of the inverted U-shaped structure, and the pipe mouth height of the input pipe is higher than the top surface height of the limiting flange.
[0013] In order to better realize the utility model, further, a first tooth-shaped groove is arranged on the top surface of the limiting flange, and a second tooth-shaped plug-in block which cooperates with the first tooth-shaped groove is arranged at the bottom of the inverted U-shaped structure.
[0014] In order to better realize the utility model, further, a guide strip is arranged on the inner wall of the cylinder, and a guide groove which is slidably connected with the guide strip is arranged at the edge of the float.
[0015] In order to better implement the utility model, further, an output pipe is arranged inside the outlet, and a guide bell mouth is arranged at one end of the output pipe corresponding to the top of the plug.
[0016] In order to better realize the utility model, further, a sewage valve and a pressure relief valve are arranged at the bottom of the cylinder.
[0017] Compared with the prior art, the utility model has the following advantages and beneficial effects:
[0018] The utility model arranges a float by sliding inside a cylinder, and arranges an elastic member at the bottom of the float. When the turbine water enters the cylinder, the float can be driven to move upward to a high position, thereby driving the plug at the top of the float to block the outlet to close the drainage passage. After the pressure at the top of the float drops, the float falls back to a low position under the action of its own gravity and the elastic force of the elastic member, thereby driving the plug at the top of the float to open the outlet to open the drainage passage, and the float moves back and forth between the high position and the low position, thereby realizing intermittent drainage of the turbine water. At the same time, through the action of the gravity of the float itself and the elastic force of the elastic member, the float is prevented from floating violently when the water pressure of the turbine water fluctuates, so that the float always keeps a relatively stable state to move between the high position and the low position, further avoiding the situation that the float opens or closes the outlet for a long time under the condition of water pressure fluctuation, thereby ensuring the safe and stable drainage operation of the turbine. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a schematic diagram of the float being in a low position;
[0020] Figure 2 It is a schematic diagram of the float being in a high position;
[0021] Figure 3 for Figure 1 A partial enlarged view of point C;
[0022] Figure 4 for Figure 1 DD section view.
[0023] Among them: 1-cylinder; 2-float; 3-elastic part; 4-plug; 5-through port; 6-plug; 7-block; 8-guide bar; 9-guide groove; A1-input pipe; A2-limiting flange; A21-first toothed groove; A22-second toothed plug; B1-output pipe; B11-guide bell mouth; 001-inlet; 002-outlet. DETAILED DESCRIPTION
[0024] The following detailed descriptions are all illustrative and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.
[0025] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the utility model. As used herein, unless the utility model explicitly states otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.
[0026] For the convenience of description, if the words "up", "down", "left" and "right" appear in the present invention, they only indicate that they are consistent with the up, down, left and right directions of the drawings themselves, and do not limit the structure. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or component must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.
[0027] Terminology explanation section: The terms "install", "connect", "connect", "fixed" and so on in the present utility model should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two elements, or an interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.
[0028] Embodiment 1:
[0029] A thermal power turbine water seal device of this embodiment, such as Figure 1 and Figure 2 As shown, it includes a cylinder 1 and a float 2 slidably arranged inside the cylinder 1, the bottom of the cylinder 1 is provided with an inlet 001, the top of the cylinder 1 is provided with an outlet 002, the bottom of the float 2 is an inverted U-shaped structure, and an elastic member 3 is provided between the inverted U-shaped structure and the inlet 001; a plug 4 is provided at the top of the float 2 corresponding to the outlet 002, and the plug 4 is slidably connected to the outlet 002; a plurality of through openings 5 are provided between the top and the bottom of the float 2.
[0030] When no water enters the inlet 001, the float 2 is in a low position due to its own weight and the elastic force of the elastic member 3. At this time, the plug 5 on the top of the float 2 is released from the outlet 002, and the outlet 002 remains open. The turbine water enters the cylinder 1 through the inlet 001 and acts on the inverted U-shaped structure at the bottom of the float 2. However, the buoyancy provided by the water is not enough to overcome the float 2 under its own weight and the elastic force of the elastic member 3. The float 2 is still in a low position. Part of the water flows to the top of the float 2 through the opening 5 on the float 2 and the gap between the float 2 and the inner wall of the cylinder 1 and flows out through the open outlet 002 for drainage. As the amount of incoming water increases, the buoyancy on the bottom of the float 2 increases. When the buoyancy overcomes the float 2's own weight and the elastic force of the elastic member 3, the elastic member 3 stretches, and the incoming water drives the float 2 to move upward to a high position. At this time, the plug 4 on the top of the float 2 enters the outlet 002, blocking and closing the outlet 002. At this time, the incoming water cannot be discharged through the outlet 002 for drainage. Part of the incoming water flows to the top of the float 2 through the opening 5 on the float 2 and the gap between the float 2 and the inner wall of the cylinder 1, causing the buoyancy at the bottom of the float 2 to be reduced to the point where it cannot overcome the float 2's own weight and the elastic force of the elastic member 3. At this time, the float 2 moves downward to a low position under the action of its own weight and the elastic force of the elastic member 3, thereby driving the plug 4 to disengage from the outlet 002, and the outlet 002 is reopened to perform the drainage operation again.
[0031] The float 2 moves back and forth between the high position and the low position to achieve intermittent automatic drainage. At the same time, since the incoming water needs to overcome the gravity of the float 2 and the elastic force of the elastic member 3, it is ensured that even if the pressure of the incoming water fluctuates, it can be buffered by the gravity of the float 2 and the elastic force of the elastic member 3. This solves the problem that the float of the traditional float drainage device cannot work smoothly when the incoming water pressure fluctuates.
[0032] Furthermore, a drain valve and a pressure relief valve are provided at the bottom of the cylinder 1. The drain valve can be used to timely discharge the incoming water and dirt stored inside the cylinder 1, and the pressure relief valve can be used to perform emergency pressure relief on the cylinder 1 to ensure safe operation of the water seal cylinder device.
[0033] Furthermore, the elastic member 3 is a spring.
[0034] The other parts of this embodiment are the same as those of Embodiment 1, and thus will not be described in detail.
[0035] Embodiment 2:
[0036] A thermal power steam turbine water seal device is improved on the basis of embodiment 1, such as Figure 1 and Figure 2As shown, a plug 6 is hingedly connected to the top of the float 2 corresponding to the through port 5, and a support arm 61 is provided at one end of the plug 6. A stopper 7 is provided on the inner wall of the cylinder 1 corresponding to the support arm 61. The stopper 7 is located between the low position and the high position of the float 2, and the plug 6 is hinged to the top of the float 2 through a hinge shaft.
[0037] When the float 2 is at a low position, the plug 6 blocks the opening 5 at the top of the float 2. When the opening 5 is blocked by the plug 6, the incoming water can only flow to the outlet 002 through the gap between the float 2 and the inner wall of the cylinder 1, thereby increasing the rate of increase of the buoyancy at the bottom of the float 2. After the buoyancy overcomes the gravity of the float 2 and the elastic force of the elastic member 3, when the float 2 moves upward, the arm 61 at one end of the plug 6 contacts the stopper 7 on the inner wall of the cylinder 1, so that the plug 6 rotates around the hinge to open the opening 5. Since the float 2 has not reached the high position at this time, that is, the outlet 002 is in an open state, the incoming water at the bottom of the float 2 flows to the outlet 002 through the opening 5 and the gap between the float 2 and the inner wall of the cylinder 1. Until the float 2 reaches the high position, it drives the plug 4 to close the outlet 002, and the incoming water flows to the top of the float 2 through the through-port 5, so that the buoyancy at the bottom of the float 2 is reduced to the point where it cannot overcome the gravity of the float 2 and the elastic force of the elastic member 3, and the float 2 moves downward to reopen the outlet 002. At the same time, the block 7 no longer conflicts with the support arm 61. At this time, the plug 6 falls back under the action of its own gravity to block the through-port 5 again.
[0038] Furthermore, the shape of the through opening 5 is arc-shaped, and the shape of the plug 6 is adapted to the shape of the through opening 5 .
[0039] The other parts of this embodiment are the same as those of Embodiment 1, and thus will not be described in detail.
[0040] Embodiment 3:
[0041] A thermal power steam turbine water seal device, improved on the basis of embodiment 1 or 2, such as Figure 3 As shown, the inlet 001 is provided with an input pipe A1 inside, and a limiting flange A2 is provided on the inner wall of the cylinder 1 corresponding to the bottom of the inverted U-shaped structure, and the pipe opening height of the input pipe A1 is higher than the top surface height of the limiting flange A2. The limiting flange A2 is used to limit the low position of the float 2, and the pipe opening height of the input pipe A1 is higher than the top surface height of the limiting flange A2, so as to form a water seal structure at the bottom of the cylinder 1.
[0042] Furthermore, a first tooth-shaped groove A21 is provided on the top surface of the limiting flange A2, and a second tooth-shaped plug block A22 is provided at the bottom of the inverted U-shaped structure to cooperate with the first tooth-shaped groove A21. When the float 2 is at a low position, the second tooth-shaped plug block A22 is connected with the first tooth-shaped groove A21 to form a labyrinth seal structure to prevent water from leaking from the inverted U-shaped structure and causing buoyancy fluctuations.
[0043] The other parts of this embodiment are the same as those of Embodiment 1 or 2, and thus will not be described in detail.
[0044] Embodiment 4:
[0045] A thermal power steam turbine water seal device, improved on the basis of any one of embodiments 1-3, such as Figure 4 As shown, a guide bar 8 is provided on the inner wall of the cylinder 1, and a guide groove 9 is provided at the edge of the float 2 to be slidably connected with the guide bar 8. The movement of the float 2 is guided by the sliding cooperation between the guide groove 9 and the guide bar 8, so as to ensure that the float 2 moves in the vertical direction between the low position and the high position.
[0046] Furthermore, an output pipe B1 is provided inside the outlet 002, and a guide bell mouth B11 is provided at one end of the output pipe B1 corresponding to the top of the plug 4. The inner diameter of the bell mouth B11 is larger than the diameter of the plug 4, and can guide the plug 4 so that the plug 4 can smoothly enter the output pipe B1.
[0047] The other parts of this embodiment are the same as any one of Embodiments 1-3, so they are not described again.
[0048] The above are only preferred embodiments of the present invention and are not intended to limit the present invention in any form. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present invention fall within the protection scope of the present invention.
Claims
1. A water seal cylinder device for a thermal power steam turbine, comprising a cylinder (1) and a float (2) slidably arranged inside the cylinder (1), characterized in that: The bottom of the cylinder (1) is provided with an inlet (001), the top of the cylinder (1) is provided with an outlet (002), the bottom of the float (2) is an inverted U-shaped structure, an elastic member (3) is provided between the inverted U-shaped structure and the inlet (001); a plug (4) is provided at the top of the float (2) corresponding to the outlet (002), the plug (4) is connected to the outlet (002) in a sliding manner; and a plurality of through openings (5) are provided between the top and bottom of the float (2).
2. A thermal power turbine water seal device according to claim 1, characterized in that: A plug (6) is hingedly connected to the top of the float (2) corresponding to the through opening (5), a support arm (61) is provided at one end of the plug (6), and a stopper (7) is provided on the inner wall of the cylinder (1) corresponding to the support arm (61).
3. A thermal power turbine water seal device according to claim 2, characterized in that: The shape of the through opening (5) is arc-shaped, and the shape of the plug (6) is adapted to the shape of the through opening (5).
4. A thermal power turbine water seal device according to any one of claims 1 to 3, characterized in that: An input pipe (A1) is arranged inside the inlet (001), and a limiting flange (A2) is arranged on the inner wall of the cylinder (1) corresponding to the bottom of the inverted U-shaped structure, and the height of the pipe mouth of the input pipe (A1) is higher than the top surface height of the limiting flange (A2).
5. A thermal power turbine water seal device according to claim 4, characterized in that: A first tooth-shaped groove (A21) is provided on the top surface of the limiting flange (A2), and a second tooth-shaped plug block (A22) that cooperates with the first tooth-shaped groove (A21) is provided at the bottom of the inverted U-shaped structure.
6. A thermal power turbine water seal device according to any one of claims 1 to 3, characterized in that: A guide strip (8) is provided on the inner wall of the cylinder (1), and a guide groove (9) is provided at the edge of the float (2) and is slidably connected to the guide strip (8).
7. A thermal power turbine water seal device according to claim 6, characterized in that: An output pipe (B1) is provided inside the outlet (002), and a guide bell mouth (B11) is provided at one end of the output pipe (B1) corresponding to the top of the plug (4).
8. A thermal power turbine water seal device according to any one of claims 1 to 3, characterized in that: A sewage valve and a pressure relief valve are provided at the bottom of the cylinder (1).