A calibration device for steam turbine controller in power plant

Abstract

The utility model discloses a calibration device for a steam turbine controller of a power plant, wherein the outer end of a work measurement box is connected to a cooling box; cold air is introduced into the cooling box; one side end of the work measurement box is connected to a steam supply mechanism; one side end of the cooling box is connected to a steam supply mechanism; a calibration mechanism is arranged inside the work measurement box; the calibration mechanism includes a sliding lifting plate, a lifting rod assembly, a measuring back plate and a lifting sliding groove; a sliding lifting plate is provided inside the work measurement box for sliding movement; the upper end of the sliding lifting plate is connected to the lifting rod assembly; the other side end of the work measurement box is connected to the measuring back plate; a lifting sliding groove is provided on the measuring back plate; the other side end of the lifting rod assembly is passed through the lifting sliding groove. The utility model provides a calibration device for a steam turbine controller of a power plant, which can reflect the size of the work done by the steam in the form of gravitational potential energy through the weight of the sliding lifting plate itself and the height of the rise, thereby realizing the inspection of the actual situation.

Description

Technical Field

[0001] The utility model relates to the technical field of steam turbine controllers, in particular to a calibration device for a steam turbine controller of a power plant. Background Art

[0002] The steam turbine feedwater heater in a power plant is a device that heats the feedwater, and achieves good thermal economy of the generator set through contact heat transfer. After the heating steam heats the feedwater in the heater, the condensed feedwater is discharged from the bottom of the heater. The condensed water from the heating steam is what we call drain. The water level control of the steam turbine feedwater heater in a power plant is achieved by controlling the amount of drain through a pneumatic controller installed on one side of the heater. If the water level of the heater is controlled too high, a major accident of water ingress to the turbine will occur. If the water level of the heater is controlled too low, the thermal economy of the generator set will also be reduced. Therefore, the generator set heat recovery system composed of the steam turbine feedwater heater is the core component of the principle thermal system of the entire power plant generator set.

[0003] However, in actual use, it was found that: since the controller often controls the evaporation efficiency of steam, the controller is often tested by using a pressure gauge on the pipeline to collect data and analyze its stability and work efficiency. However, the steam turbine in a general power plant often uses the pressure generated by steam to work on the device and drive the impeller to rotate, which also includes heat loss. The data analyzed by the pressure gauge will be different from the actual situation. Therefore, in order to truly test the actual situation, a device is needed to simulate the steam turbine in actual operation and measure the work done. Utility Model Content

[0004] In view of this, the utility model proposes a calibration device for a steam turbine controller of a power plant, which solves the above-mentioned problem of simulating the actual operating state for calibration.

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

[0006] A calibration device for a steam turbine controller in a power plant, wherein the outer end of a work measuring box is fixedly connected to a cooling box; cold air is introduced into the cooling box; the interior of one side end of the work measuring box is connected to a steam supply mechanism; the interior of one side end of the cooling box is connected to a steam supply mechanism; a calibration mechanism is provided inside the work measuring box; the calibration mechanism comprises a sliding lifting plate, a lifting rod assembly, a measuring back plate and a lifting sliding groove; a sliding lifting plate is provided inside the work measuring box; the upper end of the sliding lifting plate is fixedly connected to the lifting rod assembly; the other side end of the work measuring box is fixedly connected to the measuring back plate; a lifting sliding groove is provided on the measuring back plate; the other side end of the lifting rod assembly is passed through the lifting sliding groove.

[0007] Furthermore, the lower end of the other side of the work measurement box is connected to the condensed water outlet pipe;

[0008] A condensate baffle is tightly fitted and inserted on the pipe wall of the condensate outlet pipe; the bottom end of the condensate baffle extends into the interior of the condensate outlet pipe.

[0009] Further, the lifting rod assembly includes a lifting rod, a transmission rod and a pointer;

[0010] The upper end of the sliding lifting plate is fixedly connected to the lower end of the lifting rod;

[0011] The other side of the upper end of the lifting rod is fixedly connected to the transmission rod; the transmission rod is inserted into the lifting sliding groove;

[0012] The other side end of the transmission rod is fixedly connected to the pointer, and the pointer extends out of the measuring back plate.

[0013] Furthermore, a scale is provided on the outer end surface of the measuring back plate; the scale is located on one side of the pointer;

[0014] The upper end of the sliding lifting plate is fixedly connected to the counterweight slot.

[0015] Further, the steam supply mechanism includes a steam manufacturing box, a steam turbine steam heating controller, a heating element, a water pipe, a first steam introduction pipe, a second steam introduction pipe and a partition;

[0016] A partition is fixedly arranged inside the steam manufacturing box; the partition divides the interior of the steam manufacturing box into an upper steam chamber and a lower steam chamber;

[0017] The upper steam chamber and the lower steam chamber are connected to each other;

[0018] The side end of the upper steam chamber is connected to one end of the first steam introduction pipe; the other end of the first steam introduction pipe is connected to one side end of the work measurement box;

[0019] The side end of the lower steam chamber is connected to one end of the second steam introduction pipe; the other end of the second steam introduction pipe is connected to one side end of the cooling box;

[0020] The side end of the steam production box is connected to the water delivery pipe;

[0021] The outer side end of the steam manufacturing box is fixedly connected to the steam turbine steam heating controller;

[0022] A plurality of heating elements are fixedly mounted on the inner wall of the lower steam chamber; input ends of the plurality of heating elements are electrically connected to output ends of the steam turbine steam heating controller.

[0023] Furthermore, the interior of the other side end of the cooling box is connected to the cold air inlet pipe;

[0024] A temperature sensor is arranged inside the cooling box.

[0025] Furthermore, a water pipe baffle is tightly plugged into the pipe wall of the water pipe; the bottom end of the water pipe baffle extends into the interior of the water pipe;

[0026] A steam baffle is tightly fitted and plugged into the tube wall of the first steam introduction tube; the bottom end of the steam baffle extends into the interior of the first steam introduction tube.

[0027] Compared with the existing technology, the beneficial effects of the utility model are:

[0028] (1) The utility model provides a calibration device for a power plant steam turbine controller. The steam filled in the work measurement box will push the sliding lifting plate upward. This detection method simulates the steps of steam driving the impeller to rotate to generate electricity in actual use. The weight and height of the sliding lifting plate can reflect the size of the steam work in the form of gravitational potential energy, thereby realizing the inspection of the actual situation.

[0029] (2) The utility model provides a calibration device for a steam turbine controller of a power plant. The pointer connected to the lifting rod and the transmission rod and the scale on the measuring back plate are used to read the lifting height of the sliding lifting plate in cooperation with each other. The read height is clear and distinct. The counterweight slot can change the weight on the sliding lifting plate, which is convenient for testing a larger work value.

[0030] (3) The utility model provides a calibration device for a steam turbine controller of a power plant. The cooling box surrounding the outside realizes cooling of the device of the work measurement box. The cooling efficiency is controlled by controlling the amount of cold air introduced, thereby changing the heat consumption rate in the work measurement box. Multiple tests are performed to record the work efficiency under different heat losses, thereby inferring the output power change of the steam turbine steam heating controller. If the temperature sensor detects that the temperature in the cold air box is too low, the control valve is opened to introduce steam into the cooling box to raise the temperature to a certain level. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A three-dimensional diagram of a calibration device for a power plant steam turbine controller without a cooling box installed provided by an embodiment of the utility model;

[0032] Figure 2 A cross-sectional schematic diagram of a work measurement box provided by an embodiment of the utility model;

[0033] Figure 3 A three-dimensional diagram of a measurement back plate provided by an embodiment of the utility model;

[0034] Figure 4 A cross-sectional schematic diagram of a steam production box provided in an embodiment of the utility model;

[0035] Figure 5 A three-dimensional diagram of a calibration device for a power plant steam turbine controller without a calibration mechanism installed provided by an embodiment of the utility model;

[0036] Figure 6 A top view of a calibration device for a power plant turbine controller without a calibration mechanism installed provided by an embodiment of the utility model;

[0037] Figure 7 for Figure 6 AA section view in.

[0038] In the figure: 1. work measurement box; 2. sliding lifting plate; 3. lifting rod; 4. transmission rod; 5. measuring back plate; 6. lifting sliding groove; 7. scale; 8. pointer; 9. counterweight groove; 10. steam inlet pipe; 11. steam baffle; 12. condensate outlet pipe; 13. condensate baffle; 14. cooling box; 15. partition; 16. upper steam chamber; 17. lower steam chamber; 18. cold air inlet pipe; 19. steam manufacturing box; 20. water pipe; 21. water pipe baffle; 22. heating strip; 23. steam turbine steam heating controller; 24. second steam inlet pipe. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0040] In the description of the present invention, unless otherwise specified, "multiple" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which 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 orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0041] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it 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 an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] Example:

[0043] like Figure 1-7 As shown, a calibration device for a steam turbine controller of a power plant includes a work measurement box 1.

[0044] The outer end of the work measurement box 1 is fixedly connected to the cooling box 14; cold air is introduced into the cooling box 14; the interior of one side end of the work measurement box 1 is connected to the steam supply mechanism; the interior of one side end of the cooling box 14 is connected to the steam supply mechanism.

[0045] The lower end of the other side of the work measurement box 1 is connected to the condensate outlet pipe 12. A condensate baffle 13 is tightly fitted and inserted on the pipe wall of the condensate outlet pipe 12; the bottom end of the condensate baffle 13 extends into the interior of the condensate outlet pipe 12.

[0046] The work measurement box 1 is provided with a calibration mechanism inside. The calibration mechanism includes a sliding lifting plate 2, a lifting rod 3, a transmission rod 4, a pointer 8, a measuring back plate 5 and a lifting sliding groove 6. The work measurement box 1 is provided with a sliding lifting plate 2 for sliding movement inside. The other side end of the work measurement box 1 is fixedly connected to the measuring back plate 5; the measuring back plate 5 is provided with a lifting sliding groove 6; and the outer end surface of the measuring back plate 5 is provided with a scale 7.

[0047] The upper end of the sliding lifting plate 2 is fixedly connected to the lower end of the lifting rod 3. The other side of the upper end of the lifting rod 3 is fixedly connected to the transmission rod 4; the transmission rod 4 is inserted into the lifting sliding groove 6; the other side of the transmission rod 4 is fixedly connected to the pointer 8. The pointer 8 extends out of the measuring back plate 5. The scale 7 is located on one side of the pointer 8.

[0048] The upper end of the sliding lifting plate 2 is fixedly connected to the counterweight slot 9 .

[0049] The operator uses the work measurement box 1 to contain steam, and then uses the sliding lifting plate 2 as a component that reacts to work. The transmission rod 4 on the lifting rod 3 is plugged into the lifting sliding groove 6 on the measuring back plate 5, so the pointer 8 connected to the transmission rod 4 will rise and fall straight, which is convenient for cooperating with the scale 7 to read the corresponding height change. The counterweight groove 9 is mainly used to change the weight of the sliding lifting plate 2, change variables, and conduct multiple inspections.

[0050] The steam filled in the work measurement box 1 will push the sliding lifting plate 2 upward. This detection method simulates the steps in which steam drives the impeller to rotate to generate electricity in actual use. The weight of the sliding lifting plate 2 itself and the height of the rise can reflect the work done by the steam in the form of gravitational potential energy, thereby realizing the inspection of the actual situation.

[0051] The pointer 8 connected to the lifting rod 3 and the transmission rod 4 and the scale 7 on the measuring back plate 5 are used to cooperate with each other to read the lifting height of the sliding lifting plate 2. The read height is clear and easy for operators to read.

[0052] The lifting sliding slot 6 is used as a component to limit the lifting trajectory of the pointer 8 to prevent it from shaking during the lifting process, which causes trouble for the operator to read. The counterweight slot 9 is used to change the weight on the sliding lifting plate 2, change the variables, and conduct multiple tests, which is also convenient for testing larger work values.

[0053] The steam supply mechanism includes a steam manufacturing box 19, a turbine steam heating controller 23, a heating element, a water pipe 20, a first steam introduction pipe 10, a second steam introduction pipe 24 and a partition 15;

[0054] A partition 15 is fixedly provided inside the steam manufacturing box 19; the partition divides the interior of the steam manufacturing box 19 into an upper steam chamber 16 and a lower steam chamber 17; the upper steam chamber 16 and the lower steam chamber 17 are interconnected.

[0055] The side end of the upper steam chamber 16 is connected to one end of the first steam introduction pipe 10; the other end of the first steam introduction pipe 10 is connected to one end of the work measurement box 1. The side end of the lower steam chamber 17 is connected to one end of the second steam introduction pipe 24; the other end of the second steam introduction pipe 24 is connected to one end of the cooling box 14.

[0056] The side end of the steam production box 19 is connected to the water pipe 20. A water pipe baffle 21 is tightly fitted and inserted on the pipe wall of the water pipe 20; the bottom end of the water pipe baffle 21 extends into the interior of the water pipe 20. The water pipe baffle 21 prevents water vapor from escaping from the water pipe 20.

[0057] The outer side end of the steam manufacturing box 19 is fixedly connected to the steam turbine steam heating controller 23 .

[0058] A plurality of heating elements are fixedly mounted on the inner wall of the lower steam chamber 17 ; the input ends of the plurality of heating elements are electrically connected to the output end of the turbine steam heating controller 23 .

[0059] The heating element may be a heating strip 22. The steam turbine steam heating controller 23 is used to connect the heating strip 22 and control the power of the heating strip 22, so as to change the evaporation efficiency of the water vapor in the steam manufacturing box 19.

[0060] The other side end of the cooling box 14 is connected to the cold air inlet pipe 18. Cold air is introduced into the cooling box 14 through the cold air inlet pipe 18. The cold air inlet pipe 18, the cold air inlet pipe 18, the first steam introduction pipe 10 and the second steam introduction pipe 24 are not limited to round pipes or square pipes. A flow regulating valve is installed on the cold air inlet pipe 18. A control valve is installed on the second steam introduction pipe 24. A temperature sensor is provided in the cooling box 14.

[0061] The side end of the steam production box 19 is connected to one end of the first steam introduction pipe 10; the other end of the first steam introduction pipe 10 is connected to one end of the work measurement box 1. A steam baffle 11 is tightly fitted on the wall of the steam introduction pipe 10; the bottom end of the steam baffle 11 extends into the interior of the steam introduction pipe 10.

[0062] The condensed water in the work measurement box 1 is discharged by the condensed water outlet pipe 12, and the condensed water baffle 13 is used as a control switch. When the work measurement box 1 is used for experimental work detection, the condensed water baffle 13 is closed to prevent steam from escaping.

[0063] Working principle:

[0064] The heating element heats the water contained in the steam production box 19, and the steam generated by the heating is introduced into the work measurement box;

[0065] The work measurement box 1 is filled with steam. The steam lifts the sliding lifting plate. The pointer and scale connected to the sliding lifting plate are used to observe and record the height. The recorded height combined with the weight on the sliding lifting plate is the changed gravitational potential energy. According to the law of conservation of energy, the efficiency of steam work is estimated by using the changed gravitational potential energy, thereby inferring the output power of the steam heating controller of the steam turbine.

[0066] The cooling box 14 surrounding the outside realizes cooling of the device of the work measurement box 1. The cooling efficiency is controlled by controlling the amount of cold air introduced, thereby changing the heat consumption rate in the work measurement box 1. Multiple tests are performed and the process of S2 is repeated to record the work efficiency under different heat losses, thereby inferring the output power change of the steam turbine steam heating controller 23. If the temperature sensor detects that the temperature in the cold air box 14 is too low, the control valve is opened to introduce steam into the cooling box 14 to raise the temperature to a certain level.

[0067] The above are only preferred specific implementation methods of the utility model, but the protection scope of the utility model is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the utility model, who makes equivalent replacements or changes based on the technical scheme and utility model concept of the utility model, should be covered by the protection scope of the utility model.

Claims

1. A calibration device for a steam turbine controller of a power plant, comprising a work measurement box (1); characterized in that: The outer end of the work measurement box (1) is fixedly connected to the cooling box (14); cold air is passed into the cooling box (14); the interior of one side end of the work measurement box (1) is connected to the steam supply mechanism; the interior of one side end of the cooling box (14) is connected to the steam supply mechanism; a verification mechanism is provided inside the work measurement box (1); the verification mechanism comprises a sliding lifting plate (2), a lifting rod (3) assembly, a measurement back plate (5) and a lifting sliding groove (6); a sliding lifting plate (2) is slidingly provided inside the work measurement box (1); the upper end of the sliding lifting plate (2) is fixedly connected to the lifting rod (3) assembly; the other side end of the work measurement box (1) is fixedly connected to the measurement back plate (5); a lifting sliding groove (6) is provided on the measurement back plate (5); the other side end of the lifting rod (3) assembly is inserted into the lifting sliding groove (6).

2. The calibration equipment for a power plant steam turbine controller according to claim 1, characterized in that: The lower end of the other side of the work measurement box (1) is in communication with the condensed water outlet pipe (12); A condensate baffle (13) is tightly fitted and plugged into the tube wall of the condensate outlet pipe (12); the bottom end of the condensate baffle (13) extends into the interior of the condensate outlet pipe (12).

3. The calibration equipment for a power plant steam turbine controller according to claim 1, characterized in that: The lifting rod (3) assembly comprises a lifting rod (3), a transmission rod (4) and a pointer (8); The upper end of the sliding lifting plate (2) and the lower end of the lifting rod (3) are fixedly connected; The other side of the upper end of the lifting rod (3) is fixedly connected to the transmission rod (4); the transmission rod (4) is inserted into the lifting sliding groove (6); The other side end of the transmission rod (4) is fixedly connected to the pointer (8), and the pointer (8) extends out of the measuring back plate (5).

4. The calibration equipment for a power plant steam turbine controller according to claim 3 is characterized in that: The outer end surface of the measuring back plate (5) is provided with a scale (7); the scale (7) is located on one side of the pointer (8); The upper end of the sliding lifting plate (2) is fixedly connected to the counterweight slot (9).

5. The calibration equipment for a power plant steam turbine controller according to claim 1, characterized in that: The steam supply mechanism comprises a steam manufacturing box (19), a turbine steam heating controller (23), a heating element, a water pipe (20), a first steam introduction pipe (10), a second steam introduction pipe (24) and a partition (15); A partition (15) is fixedly provided inside the steam production box (19); the partition divides the interior of the steam production box (19) into an upper steam chamber (16) and a lower steam chamber (17); The upper steam chamber (16) and the lower steam chamber (17) are connected to each other; A side end of the upper steam chamber (16) is connected to one end of the first steam introduction pipe (10); the other end of the first steam introduction pipe (10) is connected to one side end of the work measurement box (1); A side end of the lower steam chamber (17) is connected to one end of the second steam introduction pipe (24); the other end of the second steam introduction pipe (24) is connected to one side end of the cooling box (14); The side end of the steam production box (19) is connected to the water delivery pipe (20); The outer side end of the steam production box (19) is fixedly connected to the steam turbine steam heating controller (23); A plurality of heating elements are fixedly mounted on the inner wall of the lower steam chamber (17); input ends of the plurality of heating elements are electrically connected to output ends of the turbine steam heating controller (23).

6. The calibration equipment for a power plant steam turbine controller according to claim 5, characterized in that: The interior of the other side end of the cooling box (14) is in communication with the cold air inlet pipe (18); A temperature sensor is provided inside the cooling box (14).

7. The calibration equipment for a power plant steam turbine controller according to claim 5, characterized in that: A water pipe baffle (21) is tightly fitted and plugged into the pipe wall of the water pipe (20); the bottom end of the water pipe baffle (21) extends into the interior of the water pipe (20); A steam baffle (11) is tightly fitted and plugged into the tube wall of the first steam introduction tube (10); the bottom end of the steam baffle (11) extends into the interior of the first steam introduction tube (10).

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