Water seal cylinder device for low-level water tank of steam turbine of power plant

Abstract

The utility model discloses a power plant steam turbine low-level water tank water seal cylinder device, and mainly relates to the technical field of power plant steam turbine low-level water tanks. Comprising a water seal cylinder body, a water inlet pipe is arranged at the top of the water seal cylinder body, a water outlet pipe is arranged at the bottom of the water seal cylinder body, a floating block, a water inlet seal plug matched with the water inlet pipe and a water outlet seal plug matched with the water outlet pipe are arranged in the water seal cylinder body, a guide structure matched with the floating block is vertically arranged in the water seal cylinder body, and the water inlet seal plug is located on the upper side of the floating block. A supporting piece connected with the water inlet sealing plug is arranged at the top of the floating block, the water outlet sealing plug is located on the lower side of the floating block, and a connecting structure connected with the water outlet sealing plug is arranged on the floating block. The mechanical anti-overflow structure is adopted, power supply is not needed, full water in the water seal cylinder can be treated in time, water in the water seal cylinder of the low-level water tank of the steam turbine of the power plant is prevented from overflowing, and waste of water resources is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of low-position water tanks for steam turbines in power plants, in particular to a water seal cylinder device for low-position water tanks for steam turbines in power plants. Background Art

[0002] In a thermal power plant, fuel burns in a boiler to heat water to form steam, converting the chemical energy of the fuel into thermal energy. The steam pressure drives the turbine to rotate, converting the thermal energy into mechanical energy. The turbine then drives the generator to rotate, converting the mechanical energy into electrical energy. During the use of the steam turbine in the power plant, low-level water flows into the low-level water tank through a manifold. The low-level water that passes the test is pumped into the drain tank for standby use through a low-level water pump. The existing water seal cylinder device for the low-level water tank of the steam turbine in a thermal power plant cannot well control the overflow of water in the water seal cylinder due to excessive filling, which results in a waste of water resources and is not conducive to use.

[0003] To solve the above problems, the existing patent name is: A utility model patent for a water seal cylinder device for a low-level water tank of a steam turbine in a thermal power plant (publication number: CN214464446U). It discloses a control structure using a liquid level sensor, a single-chip microcomputer and a solenoid valve. When the liquid level in the water seal cylinder exceeds the normal range, the single-chip microcomputer transmits a signal to the solenoid valve, which closes and stops water from entering the water seal cylinder to prevent water from overflowing from the water seal cylinder. Although this solves the problem of overflowing due to excessive water in the water seal cylinder, the cost is relatively high. Utility Model Content

[0004] The purpose of the utility model is to solve the problems existing in the prior art and to provide a water seal cylinder device for a low-level water tank of a steam turbine in a power plant. The device adopts a mechanical anti-overflow structure and does not require power supply. The device can promptly handle the relatively full water in the water seal cylinder and prevent the water in the water seal cylinder of the low-level water tank of the steam turbine in the power plant from overflowing due to overfilling, thereby reducing the waste of water resources.

[0005] In order to achieve the above purpose, the utility model is implemented through the following technical solutions:

[0006] A water seal cylinder device for a low-level water tank of a steam turbine in a power plant comprises a water seal cylinder body, a water inlet pipe is arranged on the top of the water seal cylinder body, a water outlet pipe is arranged on the bottom, a float, an inlet seal plug adapted to the water inlet pipe, and an outlet seal plug adapted to the water outlet pipe are arranged in the water seal cylinder body, a guide structure adapted to the float is vertically arranged in the water seal cylinder body, the inlet seal plug is located on the upper side of the float, a support member connected to the inlet seal plug is arranged on the top of the float, the outlet seal plug is located on the lower side of the float, and a connecting structure connected to the outlet seal plug is arranged on the float; the float moves upward under the action of buoyancy, and as the float moves upward, the inlet seal plug gradually moves upward to seal the water inlet pipe, and the outlet seal plug gradually moves upward to open the outlet pipe.

[0007] Preferably, the guide structure is two guide rods vertically arranged in the water seal cylinder body.

[0008] Preferably, the connecting structure is an L-shaped bracket, one end of the L-shaped bracket is fixed on the floating block, and the other end is fixed on the water outlet seal plug. A through hole is vertically provided on the cross bar of the L-shaped bracket, and a guide column adapted to the through hole is provided at the bottom of the water seal cylinder body.

[0009] Preferably, the connecting structure includes a rack vertically arranged at the bottom of the floating block, a connecting rod horizontally fixed on the water seal plug, a through hole vertically arranged in the middle of the connecting rod, a guide rod adapted to the through hole is arranged at the bottom of the water seal cylinder body, a screw rod and a nut adapted to the screw rod are arranged at the end of the connecting rod away from the water seal plug, a connecting shaft is arranged at the top of the screw rod, a support frame is arranged on one side of the screw rod, a rotating shaft transmission-connected to the connecting shaft is horizontally arranged at the top of the support frame, and a gear meshing with the rack is arranged on the rotating shaft.

[0010] Compared with the prior art, the beneficial effects of the present invention are:

[0011] The utility model arranges an anti-overflow structure composed of a floating block, a water inlet seal plug, a water outlet seal plug, etc. in a water seal cylinder body. The anti-overflow structure is a purely mechanical structure and does not require power supply. As the water level in the water seal cylinder body rises, the floating block in the water seal cylinder body moves upward under the action of buoyancy. As the floating block moves upward, the water inlet seal plug gradually moves upward to block the water inlet pipe, and the water outlet seal plug gradually moves upward to open the water outlet pipe, so that the water outlet pipe is in a smooth state. The water in the water seal cylinder body is discharged to a corresponding position through the water outlet pipe, which is convenient for timely processing of the relatively full water in the water seal cylinder, preventing the water in the water seal cylinder of the low-level water tank of the steam turbine in the power plant from being overfilled and overflowing, thereby reducing the waste of water resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the utility model;

[0013] Figure 2 yes Figure 1 A magnified view of part A;

[0014] Figure 3 yes Figure 1 A magnified view of part B;

[0015] Figure 4 It is a schematic diagram of the external structure of the utility model.

[0016] The numbers in the attached figure are: 1. water seal cylinder body; 2. water inlet pipe; 3. water outlet pipe; 4. floating block; 5. water inlet seal blockage; 6. water outlet seal blockage; 7. guide structure; 8. rack; 9. connecting rod; 10. guide rod; 11. screw rod; 12. connecting shaft; 13. support frame; 14. rotating shaft; 15. gear. DETAILED DESCRIPTION

[0017] The present invention is further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the present application.

[0018] Embodiment 1: As attached Figure 1-4 As shown, the utility model is a water seal cylinder device for a low-level water tank of a steam turbine in a power plant, comprising a water seal cylinder body 1, a water inlet pipe 2 is provided on the top of the water seal cylinder body 1, and a water outlet pipe 3 is provided on the bottom. A floating block 4, a water inlet seal plug 5 adapted to the water inlet pipe 2, and a water outlet seal plug 6 adapted to the water outlet pipe 3 are provided inside the water seal cylinder body 1.

[0019] A guide structure 7 adapted to the floating block 4 is vertically arranged in the water seal cylinder body 1 to ensure that the floating block 4 can only float vertically up and down.

[0020] Preferably, in order to ensure the stability of the guidance, the guide structure 7 is two guide rods vertically arranged in the water seal tube body 1, and guide holes adapted to the guide rods are vertically provided on the float 4. The stability of the vertical floating of the float 4 is ensured by the cooperation between the guide rods and the guide holes.

[0021] The water inlet seal plug 5 is located on the upper side of the float 4, and a support member connected to the water inlet seal plug 5 is provided on the top of the float 4. The water outlet seal plug 6 is located on the lower side of the float 4, and a connecting structure connected to the water outlet seal plug 6 is provided on the float 4; the float 4 moves upward under the action of buoyancy, and as the float 4 moves upward, the water inlet seal plug 5 gradually moves upward to seal the water inlet pipe 2, and the water outlet seal plug 6 gradually moves upward to open the water outlet pipe 3.

[0022] Preferably, the connection structure includes a rack 8 vertically arranged at the bottom of the floating block 4, a connecting rod 9 horizontally fixed on the water outlet seal plug 6, a through hole is vertically arranged in the middle of the connecting rod 9, a guide rod 10 adapted to the through hole is arranged at the bottom of the water seal cylinder body 1, a screw rod 11 and a nut adapted to the screw rod 11 are arranged at one end of the connecting rod 9 away from the water outlet seal plug 6, a connecting shaft 12 is arranged at the top of the screw rod 11, a support frame 13 is arranged on one side of the screw rod 11, and the top of the support frame 13 A rotating shaft 14 is horizontally provided which is transmission-connected to the connecting shaft 12. The rotating shaft 14 and the connecting shaft 12 are transmission-connected via a bevel gear. A gear 15 meshing with the rack 8 is provided on the rotating shaft 14. The floating block 4 floats up, and the water inlet seal plug 5 is gradually moved up to block the water inlet pipe 2. At the same time, the rotating shaft 14 is driven to rotate through the rack gear. The rotation of the rotating shaft 14 drives the connecting shaft 12 to rotate through the bevel gear. The rotation of the connecting shaft 12 drives the screw rod 11 to rotate, thereby driving the water outlet seal plug 6 to move up and open the water outlet pipe 3.

[0023] When the utility model is in use, when the water in the water seal cylinder body 1 is almost full, the water in the water seal cylinder body 1 pushes the floating block 4 to move up, and the floating block 4 moves upward along the guide structure 7 and drives the water inlet seal plug 5 and the rack 8 to move up, and the water inlet seal plug 5 moves up to the water inlet pipe 2 to seal it, so that it is convenient to automatically realize whether to seal the water inlet pipe 2 according to the water level height in the water seal cylinder body 1, and the rack 8 moves up to drive the connecting shaft 12 to rotate through the gear 15, the rotating shaft 14, and the bevel gear, and then drives the screw rod 11 to rotate. The screw rod 11 rotates and drives the connecting rod 9 to move up. The connecting rod 9 moves up and drives the water outlet seal plug 6 to move up, so that the water outlet pipe 3 is unblocked, and the water in the water seal cylinder body 1 is discharged to the corresponding position through the water outlet pipe 3, which is convenient for timely processing of the full water in the water seal cylinder, preventing the water in the water seal cylinder of the low-level water tank of the steam turbine in the power plant from overflowing due to excessive filling, and reducing the waste of water resources.

[0024] Embodiment 2: The difference between this embodiment and embodiment 1 lies in the difference in the connection structure. When the outlet pipe 3 is located directly below the inlet pipe 2, the connection structure is a vertically arranged connection frame, and the floating block 4 floats up, and the water inlet seal plug 5 is moved up to the water inlet pipe 2, while the water outlet seal plug 6 is pulled out from the outlet pipe 3. When the outlet pipe 3 is located on one side of the water inlet pipe 2, the connection structure is an L-shaped bracket, one end of the L-shaped bracket is fixed on the floating block 4, and the other end is fixed on the water outlet seal plug 6. A through hole is vertically provided on the cross bar of the L-shaped bracket, and a guide column adapted to the through hole is provided at the bottom of the water seal cylinder body 1. The floating block 4 floats up, and the water inlet seal plug 5 is moved up to the water inlet pipe 2, while the water outlet seal plug 6 is pulled out from the outlet pipe 3.

Claims

1. A water seal device for a low-level water tank of a steam turbine in a power plant, comprising a water seal body (1), characterized in that: The water seal cylinder body (1) is provided with a water inlet pipe (2) at the top and a water outlet pipe (3) at the bottom. A floating block (4), a water inlet seal plug (5) adapted to the water inlet pipe (2), and a water outlet seal plug (6) adapted to the water outlet pipe (3) are arranged inside the water seal cylinder body (1). A guide structure (7) adapted to the floating block (4) is vertically arranged inside the water seal cylinder body (1). The water inlet seal plug (5) is located on the upper side of the floating block (4). A support member connected to the water inlet seal plug (5) is provided on the top of the floating block (4). The water outlet seal plug (6) is located on the lower side of the floating block (4). A connecting structure connected to the water outlet seal plug (6) is provided on the floating block (4). The floating block (4) moves upward under the action of buoyancy. As the floating block (4) moves upward, the water inlet seal plug (5) gradually moves upward to seal the water inlet pipe (2), and the water outlet seal plug (6) gradually moves upward to open the water outlet pipe (3).

2. The water seal device for a low-level water tank of a steam turbine in a power plant according to claim 1, characterized in that: The guide structure (7) is two guide rods vertically arranged inside the water seal cylinder body (1).

3. The water seal device for a low-level water tank of a steam turbine in a power plant according to claim 1, characterized in that: The connection structure is an L-shaped bracket, one end of the L-shaped bracket is fixed on the floating block (4), and the other end is fixed on the water outlet seal plug (6). A through hole is vertically provided on the cross bar of the L-shaped bracket, and a guide column adapted to the through hole is provided at the bottom of the water seal cylinder body (1).

4. The water seal device for a low-level water tank of a steam turbine in a power plant according to claim 1, characterized in that: The connection structure comprises a rack (8) vertically arranged at the bottom of the floating block (4), a connecting rod (9) horizontally fixed on the water outlet seal plug (6), a through hole vertically arranged in the middle of the connecting rod (9), a guide rod (10) adapted to the through hole arranged at the bottom of the water seal cylinder body (1), a screw rod (11) and a nut adapted to the screw rod (11) arranged at one end of the connecting rod (9) away from the water outlet seal plug (6), a connecting shaft (12) arranged at the top of the screw rod (11), a support frame (13) arranged at one side of the screw rod (11), a rotating shaft (14) transmission-connected to the connecting shaft (12) arranged horizontally at the top of the support frame (13), and a gear (15) meshing with the rack (8) arranged on the rotating shaft (14).

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