Hydropower station top cover drainage control device

Abstract

The utility model provides a drainage control device for a top cover of a hydropower station, which belongs to the technical field of hydropower station equipment and comprises a shell, a sealing cover, a protection component, a drainage component and a drainage component. Wherein the protection assembly comprises a mounting seat, a limiting rod, a hinge, a knob, a storage pipe, a storage motor, a storage wheel, a rope, an extrusion spring and a sealing shell, the mounting seat is fixedly arranged on the outer wall of the sealing cover, and one end of the limiting rod is rotatably inserted into the outer wall of the mounting seat. Through the protection assembly, in the subsequent knob operation process, it can be avoided that a worker mistakenly touches a knob, equipment is started mistakenly, and a drainage device breaks down, the operation safety is improved, an operator can know the change condition of the water level in the top cover in the first time, the work intensity and workload of maintenance personnel are reduced, and the maintenance efficiency is improved. And the automation degree of the hydraulic power plant is further improved and enhanced.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydropower station equipment, and in particular relates to a top cover drainage control device for a hydropower station. Background Art

[0002] The hydropower station is an axial flow propeller turbine. There are three top cover drainage pumps on site, which are standby for each other. There is also a top cover drainage control box. The liquid level control originally adopted a conventional float magnetic liquid level switch. The liquid level switch has three liquid level control positions: high water level, too high, and normal. The liquid level switch is used to directly control the start, stop and alarm of the water pump. When the water level is high, the main pump is started, and when it is normal, the pump is stopped. When it is high, the standby pump is started. When it is too high, the two standby pumps are started at the same time and an alarm signal is issued. From the operation situation, this control part is relatively ideal, but it is easy to cause water inflow to the water guide bearing due to the failure of the liquid level switch, resulting in forced shutdown of the unit. Water inflow to the oil tank will affect the oil film of the turbine oil, deteriorate the lubrication and cooling conditions of the water guide bearing, and cause rust on the journal. Moreover, after the water guide is filled with water, it is necessary to replace the turbine oil, clean the water guide, and inspect the liquid level switch, which is time-consuming and labor-intensive, affecting normal power generation.

[0003] The control method of the water turbine cover drainage in the hydropower plant has been improved, and the top cover drainage analog quantity and switch quantity dual sets of different principle control logic have been realized. The two work at the same time, serve as backup and check each other. The protection of the water guide bearing to prevent water from flooding during the operation of the unit has been increased, and the self-control ability has been enhanced, while the alarm system and fault system have been improved accordingly. The operating personnel can understand the changes in the water level in the top cover at the first time, and the work intensity and workload of the maintenance personnel have been reduced. The degree of automation of the hydropower plant has been further improved and strengthened, providing a more stable, safe and reliable basic guarantee for the development of the social economy. Utility Model Content

[0004] The utility model aims to provide a water drainage control device for a top cover of a hydropower station, aiming to solve the problems raised by the background technology.

[0005] A water drainage control device for a hydropower station top cover, comprising:

[0006] A shell and a sealing cover, wherein the sealing cover is embedded in the inner wall of the shell by rotation;

[0007] A protection component is arranged on the outer wall of the sealing cover, wherein: the protection component includes a mounting seat, a limit rod, a hinge, a knob, a storage tube, a storage motor, a storage wheel, a rope, an extrusion spring and a sealing shell, the mounting seat is fixedly arranged on the outer wall of the sealing cover, one end of the limit rod is rotatably inserted on the outer wall of the mounting seat, the other end of the limit rod is rotatably inserted on the outer wall of the sealing shell, the sealing shell is rotatably inserted on the outer wall of the mounting seat through a hinge, the knob is embedded in the inner wall of the mounting seat, the storage tube is fixedly arranged on the outer wall of the sealing cover, the storage wheel is fixedly arranged at the output end of the storage motor, the rope is wound around the inner wall of the storage wheel, one end of the rope is wound around the outer wall of the sealing shell, the extrusion spring is fixedly arranged on the outer wall of the sealing shell, and one end of the extrusion spring is attached to the inner wall of the storage tube.

[0008] Furthermore, a display light is embedded in the opening of the outer wall of the sealing cover.

[0009] Furthermore, a display is embedded in the outer wall of the sealing cover near the bottom opening.

[0010] Furthermore, a display window is provided on the outer wall of the sealing shell.

[0011] Furthermore, the storage wheel is rotatably inserted into the outer wall of the mounting seat through a rotating shaft.

[0012] Furthermore, the extrusion spring and the storage tube match each other.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] By protecting the components, workers can be prevented from accidentally touching the knob during subsequent knob operations, which can cause the equipment to start incorrectly and cause the drainage device to malfunction. This improves the safety of operation, allows operators to understand the changes in the water level in the top cover at the first time, and reduces the work intensity and workload of maintenance personnel. The degree of automation of the hydropower plant has been further improved and strengthened. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0016] Figure 1 It is a three-dimensional diagram of the utility model;

[0017] Figure 2 It is a three-dimensional diagram of the storage wheel of the utility model;

[0018] Figure 3 A three-dimensional diagram of the display window of the utility model;

[0019] Figure 4 The figure is a schematic diagram of the electrical connection of the single-loop control type digital display of the utility model.

[0020] In the figure: 1. outer shell; 2. sealing cover; 3. display light; 4. display; 5. mounting base; 6. limit rod; 7. hinge; 8. knob; 9. storage tube; 10. storage motor; 11. storage wheel; 12. rope; 13. extrusion spring; 14. sealing shell; 15. display window. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0023] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "set / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0024] See also Figure 1-4 , the technical solution provided by this embodiment is as follows:

[0025] A water drainage control device for a hydropower station top cover, comprising:

[0026] The outer shell 1 and the sealing cover 2 are embedded in the inner wall of the outer shell 1 by rotation;

[0027] A protection component is arranged on the outer wall of the sealing cover 2, wherein: the protection component includes a mounting seat 5, a limiting rod 6, a hinge 7, a knob 8, a storage tube 9, a storage motor 10, a storage wheel 11, a rope 12, an extrusion spring 13 and a sealing shell 14, the mounting seat 5 is fixedly arranged on the outer wall of the sealing cover 2, one end of the limiting rod 6 is rotatably inserted on the outer wall of the mounting seat 5, the other end of the limiting rod 6 is rotatably inserted on the outer wall of the sealing shell 14, the sealing shell 14 is rotatably inserted on the outer wall of the mounting seat 5 through the hinge 7, the knob 8 is embedded in the inner wall of the mounting seat 5, the storage tube 9 is fixedly arranged on the outer wall of the sealing cover 2, the storage wheel 11 is fixedly arranged at the output end of the storage motor 10, the rope 12 is wound around the inner wall of the storage wheel 11, one end of the rope 12 is wound around the outer wall of the sealing shell 14, the extrusion spring 13 is fixedly arranged on the outer wall of the sealing shell 14, and one end of the extrusion spring 13 is attached to the inner wall of the storage tube 9.

[0028] In a specific embodiment of the utility model, the protective component can be used to prevent the operator from accidentally touching the knob 8 during the subsequent operation of the knob 8, which may cause the device to be started incorrectly and cause the drainage device to malfunction, thereby improving the safety of the operation. The control device is installed inside the housing 1, and then the operator turns on the control device according to the display light 3 and the display 4. When the control device needs to be turned on by the knob 8, the storage motor 10 is released from the self-locking state. Under the action of the extrusion spring 13, the sealing shell 14 is moved away from the mounting seat 5, exposing the knob 8. The control device is operated in combination with the display light 3 and the display 4. After the operation is completed, the storage motor 10 is started, and the storage wheel 11 is matched, so that the rope 12 pulls the sealing shell 14 to rotate, thereby completing the sealing of the knob 8.

[0029] The interior of the housing 1 uses a conventional single-float magnetic liquid level switch and is combined with a single-loop control type digital display analog control method, and the two are jointly controlled and serve as backup for each other.

[0030] The single-loop control digital display uses a liquid level transmitter to continuously output 4-20mA current according to the change of liquid level. It has full sealing protection, no water ingress and fast response. In order to make the operation and management of the top cover drainage more convenient and flexible, a display control instrument model CIA11 is installed on the panel of the local control box. The 4-20mA current output by the liquid level transmitter is input to the control instrument, which controls the start and stop of the water pump, and the PLC of the unit plays a monitoring role.

[0031] The instrument has control and display functions. The instrument input can adopt various specifications of signals such as 4~20mA, thermoelectric, thermal resistance, etc. There are four-way node output, and the action value and return value of each way are set separately, that is, each node can control the connection and disconnection of the way separately. The instrument directly displays the water level value. The setting of parameters such as range, action value, return value, display enlargement or reduction are all completed on the panel. The instrument has a DC 24V output, which provides a DC power supply for the two-wire transmitter. The instrument is powered by an AC 220V power supply, and is connected to the host computer monitoring system through the photoelectric isolation RS485 serial communication port. It also has a 4~20mA output.

[0032] Meter AL1 is the pump stop signal; AL2 is the working pump start signal; AL3 is the No. 1 standby pump start signal; AL4 is the No. 2 standby pump start signal.

[0033] Specifically, a display light 3 is embedded in the opening of the outer wall of the sealing cover 2 .

[0034] In a specific embodiment of the present invention, the display light 3 can provide visual prompts to the staff.

[0035] Specifically, a display 4 is embedded in the outer wall of the sealing cover 2 near the bottom opening.

[0036] In a specific embodiment of the present utility model, the display 4 can display the status of the drainage control device.

[0037] Specifically, a display window 15 is formed on the outer wall of the sealed shell 14 .

[0038] In a specific embodiment of the present invention, the display window 15 can facilitate the staff to control the knob 8.

[0039] Specifically, the storage wheel 11 is rotatably inserted into the outer wall of the mounting seat 5 via a rotating shaft.

[0040] In a specific embodiment of the present invention, the storage wheel 11 is rotatably inserted into the outer wall of the mounting seat 5 via a rotating shaft, so that the stability of rotation can be ensured.

[0041] Specifically, the compression spring 13 and the storage tube 9 match each other.

[0042] In a specific embodiment of the present utility model, the extrusion spring 13 and the receiving tube 9 match each other, which can ensure the driving of the sealing shell 14.

[0043] Working principle:

[0044] By using the protective component, the staff can be prevented from accidentally touching the knob 8 during the subsequent operation of the knob 8, which can cause the equipment to start incorrectly and cause the drainage device to malfunction, thereby improving the safety of operation. The control device is installed inside the housing 1, and then the staff turns on the control device according to the display light 3 and the display 4. When the control device needs to be turned on by the knob 8, the storage motor 10 is released from self-locking. Under the action of the extrusion spring 13, the sealing shell 14 is moved away from the mounting seat 5, exposing the knob 8. The control device is operated in combination with the display light 3 and the display 4. After the operation is completed, the storage motor 10 is started, and the storage wheel 11 is used to make the rope 12 pull the sealing shell 14 to rotate, thereby completing the sealing of the knob 8.

[0045] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A water drainage control device for a hydropower station roof, characterized in that: include, A housing (1) and a sealing cover (2), wherein the sealing cover (2) is embedded in the inner wall of the housing (1) by rotation; A protection component is arranged on the outer wall of a sealing cover (2), wherein the protection component comprises a mounting seat (5), a limiting rod (6), a hinge (7), a knob (8), a storage tube (9), a storage motor (10), a storage wheel (11), a rope (12), a compression spring (13) and a sealing shell (14); the mounting seat (5) is fixedly arranged on the outer wall of the sealing cover (2); one end of the limiting rod (6) is rotatably inserted on the outer wall of the mounting seat (5); the other end of the limiting rod (6) is rotatably inserted on the outer wall of the sealing shell (14); the sealing shell (14) is hinged The chain (7) is rotatably inserted into the outer wall of the mounting seat (5), the knob (8) is embedded in the inner wall of the mounting seat (5), the storage tube (9) is fixedly arranged on the outer wall of the sealing cover (2), the storage wheel (11) is fixedly arranged at the output end of the storage motor (10), the rope (12) is wound around the inner wall of the storage wheel (11), one end of the rope (12) is wound around the outer wall of the sealing shell (14), the extrusion spring (13) is fixedly arranged on the outer wall of the sealing shell (14), and one end of the extrusion spring (13) is attached to the inner wall of the storage tube (9).

2. A hydropower station top cover drainage control device according to claim 1, characterized in that: A display light (3) is embedded in the opening of the outer wall of the sealing cover (2).

3. A hydropower station top cover drainage control device according to claim 2, characterized in that: A display (4) is embedded in the outer wall of the sealing cover (2) near the bottom opening.

4. A hydropower station top cover drainage control device according to claim 3, characterized in that: The outer wall of the sealed shell (14) is provided with a display window (15).

5. A hydropower station top cover drainage control device according to claim 4, characterized in that: The storage wheel (11) is rotatably inserted into the outer wall of the mounting seat (5) via a rotating shaft.

6. A water supply control device for a hydropower station roof according to claim 5, characterized in that: The extrusion spring (13) and the storage tube (9) match each other.

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