A calibration device and calibration method for a steam turbine controller in a power plant

Abstract

The present invention discloses a calibration device for a power plant steam turbine controller and a calibration method thereof. The calibration device includes a work measurement box; one side end of the work measurement box is connected in communication with a steam supply mechanism; the outer end face of the work measurement box is connected to a cooling medium transmission mechanism; a calibration mechanism is provided inside the work measurement box; the calibration mechanism includes a sliding lifting plate, a lifting rod assembly, a measurement back plate and a lifting sliding groove; the sliding lifting plate is slidably arranged inside the work measurement box; 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 measurement back plate; a lifting sliding groove is formed on the measurement back plate; the other side end of the lifting rod assembly passes through the lifting sliding groove. The calibration device for a power plant steam turbine controller and the calibration method thereof provided by the present invention can reflect the work done by steam in the form of gravitational potential energy through the weight of the sliding lifting plate itself and the height it rises, so as to realize the inspection of the actual situation.

Description

Technical Field

[0001] The present invention relates to the technical field of steam turbine controllers, and particularly relates to a calibration device and a calibration method for a steam turbine controller in a power plant. Background Art

[0002] The feedwater heater of a power plant steam turbine is a device for heating feedwater. Through contact heat transfer, good thermal economy of the generating unit is achieved. After the heating steam heats the feedwater in the heater, the condensed feedwater formed is discharged from the bottom of the heater, and this heated steam condensate is what we call the drain water. The water level control of the power plant steam turbine feedwater heater is to control the drain water volume through a pneumatic controller installed on one side of the heater. If the water level control of the heater is too high, it will cause a major accident of water ingress into the steam turbine. If the water level control of the heater is too low, it will also reduce the thermal economy of the generating unit. Therefore, the regenerative system of the generating unit composed of the steam turbine feedwater heater is the core component of the principle thermal system of the entire power plant generating unit.

[0003] However, it has been found in actual use that: since the controller often controls the evaporation efficiency of the steam, when testing the controller, data is often collected using a pressure gauge on the pipeline and its stability and work efficiency are analyzed. However, the steam turbines in general power plants often use the pressure generated by steam to do work on the device and drive the impeller to rotate, including heat dissipation. There will be a certain deviation between the data analyzed by the pressure gauge and the actual situation. Therefore, in order to truly test the actual situation, a device is needed to simulate the steam turbine under actual operating conditions and measure the work done. Summary of the Invention

[0004] In view of this, the present invention provides a calibration device and a calibration method for a steam turbine controller in a power plant, which solve the problem of simulating actual operating conditions for testing as mentioned above.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A calibration device for a steam turbine controller in a power plant includes a work measurement box; one side end of the work measurement box is connected in a communicating manner with a steam supply mechanism; the outer end face of the work measurement box is fixedly connected with a cooling medium transmission mechanism; a calibration mechanism is arranged inside the work measurement box; the calibration mechanism includes a sliding lifting plate, a lifting rod assembly, a measurement back plate, and a lifting sliding groove; the sliding lifting plate is slidably arranged inside the work measurement box; the upper end of the sliding lifting plate is fixedly connected with the lifting rod assembly; the other side end of the work measurement box is fixedly connected with the measurement back plate; a lifting sliding groove is formed on the measurement back plate; the other side end of the lifting rod assembly penetrates through the lifting sliding groove.

[0007] Further, the lower end of the other side of the work measurement box is connected to the condensate discharge pipe in a communicating manner;

[0008] A condensate baffle is tightly inserted into the pipe wall of the condensate discharge pipe; the bottom end of the condensate baffle extends into the interior of the condensate discharge 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 through 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 measurement back plate.

[0013] Further, a scale is provided on the outer end face of the measurement 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 weight groove.

[0015] Further, the steam supply mechanism includes a steam production box, a steam heating controller for the steam turbine, a heating element, a water delivery pipe, and a steam inlet pipe;

[0016] The side end of the steam production box is connected to the water delivery pipe in a communicating manner;

[0017] One end of the side end of the steam production box is connected to one end of the steam inlet pipe in a communicating manner; the other end of the steam inlet pipe is connected to one side end of the work measurement box in a communicating manner;

[0018] The side end of the steam production box is fixedly connected to the steam heating controller for the steam turbine;

[0019] A plurality of heating elements are fixedly installed inside the steam production box; the input ends of the plurality of heating elements are electrically connected to the output end of the steam heating controller for the steam turbine.

[0020] Further, a water delivery pipe baffle is tightly inserted into the pipe wall of the water delivery pipe; the bottom end of the water delivery pipe baffle extends into the interior of the water delivery pipe;

[0021] A steam baffle is tightly inserted into the pipe wall of the steam inlet pipe; the bottom end of the steam baffle extends into the interior of the steam inlet pipe.

[0022] Further, the cooling medium transmission mechanism includes a cooling medium delivery component and a cooling medium supply component.

[0023] Further, the cooling medium delivery assembly includes a cooling water dispersion pipe, a cooling water intermediate pipe, a cooling water insertion baffle, a cooling hollow plate, a cooling water recovery pipe, and a cooling water outlet pipe;

[0024] One side end of the work measurement box is respectively connected in communication with the cooling water dispersion pipe and the cooling water recovery pipe;

[0025] The other side end of the cooling water dispersion pipe is respectively connected to a plurality of the cooling water intermediate pipes; A cooling water insertion baffle is tightly inserted on the pipe wall of each cooling water intermediate pipe; The bottom end of the cooling water insertion baffle extends into the interior of the cooling water intermediate pipe;

[0026] The other side end of the cooling water intermediate pipe is connected in communication with one end of the cooling hollow plate; A plurality of the cooling hollow plates are covered and arranged on the outer end face of the work measurement box;

[0027] The other end of the cooling hollow plate is connected in communication with the cooling water recovery pipe;

[0028] The cooling water recovery pipe is connected in communication with the cooling water outlet pipe.

[0029] Further, the cooling medium supply assembly includes a cooling water pump outlet pipe, a bearing vertical plate, a sliding groove, a translation rod, a flow rate insertion plate, an extension plate, a water pump assembly, and a cooling water inlet pipe;

[0030] One end of the cooling water pump outlet pipe is connected in communication with the lower end of the cooling water dispersion pipe;

[0031] The other end of the cooling water pump outlet pipe is connected to the cooling water inlet pipe;

[0032] A water pump assembly is fixedly installed on the cooling water pump outlet pipe;

[0033] A through groove is formed on the pipe wall end face of the cooling water pump outlet pipe; The upper end of the pipe wall of the cooling water pump outlet pipe is fixedly connected to the bearing vertical plate; The sliding groove is formed on the bearing vertical plate; The translation rod is slidably arranged on the bearing vertical plate through the sliding groove; The side end of the translation rod extending out of the bearing vertical plate is fixedly connected to the extension plate; The extension plate is threadedly connected to the bearing vertical plate; The lower end of the translation rod is fixedly connected to the flow rate insertion plate; The flow rate insertion plate is tightly inserted into the cooling water pump outlet pipe through the through groove; The bottom end of the flow rate insertion plate extends into the interior of the cooling water pump outlet pipe.

[0034] The present invention also provides a calibration method for a calibration device of a power plant steam turbine controller, including the following steps:

[0035] S1: A heating element heats the water contained in the steam production box, and the steam generated by heating is introduced into the work measurement box;

[0036] S2: The inside of the work measurement box is filled with steam. The filled steam will lift the sliding lifting plate, and a pointer connected to the sliding lifting plate and a scale are used to observe and record the lifted height value. 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 doing work is estimated using the changed gravitational potential energy, and thus the output power of the steam heating controller of the steam engine is deduced inversely.

[0037] S3: The externally surrounded cooling hollow plate cools the device of the work measurement box. The cooling efficiency is controlled by controlling the flow rate of the cooling water and the number of cooling hollow plates, so as to change the heat consumption rate in the work measurement box. Through multiple tests and repeating the process of S2, the work efficiency under different heat losses is recorded, and thus the change of the output power of the steam heating controller of the steam engine is deduced inversely.

[0038] Compared with the existing technology, the beneficial effects of the present invention are:

[0039] (1) For the calibration equipment of the power plant steam engine controller provided by the present invention, the steam filled in the work measurement box will push the sliding lifting plate upward. This detection method simulates the step of steam driving the impeller and other components to rotate to generate electricity in actual operation. And the weight of the sliding lifting plate itself and the lifted height can reflect the work done by the steam in the form of gravitational potential energy, so as to realize the inspection of the actual situation.

[0040] (2) For the calibration equipment of the power plant steam engine controller provided by the present invention, the pointer connected by the lifting rod and the transmission rod and the scale on the measurement backboard are used in cooperation to read the lifting height of the sliding lifting plate, and the reading of the height is clear and definite; while the counterweight groove can change the weight on the sliding lifting plate, which is convenient for the inspection of larger work values.

[0041] (3) For the calibration equipment of the power plant steam engine controller provided by the present invention, its cooling medium conveying component is used to cool the steam in the work measurement box to simulate the situation of steam encountering cooling in actual use; and combined with the components for power inspection, the power of steam doing work step by step under different cooling environments and in the case of heat energy loss can be seen; the flow rate inside the pipe is controlled by using the insertion depth of the flow rate plug board and the cooling water pump outlet pipe, so as to control the flow rate of the cooling water, thus playing an auxiliary role in adjusting and maintaining the cooling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 is a perspective view of the calibration equipment of the power plant steam engine controller provided by the embodiment of the present invention;

[0043] Figure 2 is a schematic cross-sectional view of the work measurement box provided by the embodiment of the present invention;

[0044] Figure 3 This is a perspective view of the measurement backplane provided by the embodiment of the present invention;

[0045] Figure 4 This is a perspective view of the cooling medium transmission mechanism provided by the embodiment of the present invention;

[0046] Figure 5 This is a partial structure perspective view of the cooling medium delivery assembly provided by the embodiment of the present invention;

[0047] Figure 6 This is a schematic cross-sectional view of the steam generation box provided by the embodiment of the present invention;

[0048] Figure 7 This is a schematic cross-sectional view of the water pump assembly provided by the embodiment of the present invention.

[0049] In the figure: 1, work measurement box; 2, sliding lifting plate; 3, lifting rod; 4, transmission rod; 5, measurement backplane; 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 water dispersion pipe; 15, cooling water intermediate pipe; 16, cooling water insertion baffle; 17, cooling hollow plate; 18, cooling water recovery pipe; 19, cooling water outlet pipe; 20, cooling water pump outlet pipe; 21, bearing vertical plate; 22, sliding groove; 23, translation rod; 24, flow insertion plate; 25, extension plate; 26, screw; 27, water pump housing; 28, water pump base; 29, water pump; 30, cooling water inlet pipe; 31, steam generation box; 32, water delivery pipe; 33, water delivery pipe baffle; 34, heating strip; 35, steam turbine steam heating controller. Detailed implementation manners

[0050] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0051] In the description of the present invention, unless otherwise specified, "a plurality of" means two or more; the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0052] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "connected" and "connected" 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 directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0053] Embodiment:

[0054] As Figures 1-7 shown, a calibration device for a steam turbine controller in a power plant includes a work measurement box 1.

[0055] The lower end on the other side of the work measurement box 1 is connected and communicated with a condensate discharge pipe 12. A condensate baffle 13 is tightly inserted into the pipe wall of the condensate discharge pipe 12; the bottom end of the condensate baffle 13 extends into the interior of the condensate discharge pipe 12.

[0056] A calibration mechanism is provided inside the work measurement box 1. The calibration mechanism includes a sliding lifting plate 2, a lifting rod 3, a transmission rod 4, a pointer 8, a measurement back plate 5, and a lifting sliding groove 6. The sliding lifting plate 2 is slidably provided inside the work measurement box 1. The other 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; a scale 7 is provided on the outer end face of the measurement back plate 5.

[0057] 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 end of the transmission rod 4 is fixedly connected to the pointer 8. The pointer 8 extends out of the measurement back plate 5. The scale 7 is located on one side of the pointer 8.

[0058] The upper end of the sliding lifting plate 2 is fixedly connected to a counterweight groove 9.

[0059] The operator uses the work measurement box 1 to hold steam, and then uses the sliding lifting plate 2 as a component for reacting to work. Among them, the transmission rod 4 on the lifting rod 3 is inserted into the lifting sliding groove 6 on the measurement back plate 5. Therefore, the pointer 8 connected to the transmission rod 4 will move straight up and down, which is convenient for reading the corresponding height change in cooperation with the scale 7. The counterweight groove 9 is mainly used to change the weight of the sliding lifting plate 2, change the variable, and conduct multiple inspections.

[0060] Among them, the steam filled in the work measurement box 1 will push the sliding lifting plate 2 upward. This detection method simulates the steps of steam driving the impeller and other components to rotate to generate electricity in actual operation. The work done by the steam can be reflected in the form of gravitational potential energy by the weight of the sliding lifting plate 2 itself and the height it rises, so as to realize the inspection of the actual situation.

[0061] The pointer 8 connected to the lifting rod 3 and the transmission rod 4 and the scale 7 on the measurement back plate 5 are used in cooperation to read the lifting height of the sliding lifting plate 2, and the reading of the height is clear and convenient for the operator to read.

[0062] Among them, the lifting sliding groove 6 is a component that limits the lifting trajectory of the pointer 8 to prevent it from shaking during the lifting process and causing trouble for the operator to read. The counterweight groove 9 is used to change the weight on the sliding lifting plate 2, change the variable, and conduct multiple inspections, which is also convenient for inspecting larger work values.

[0063] One side end of the work measurement box 1 is connected and communicated with the steam supply mechanism.

[0064] The steam supply mechanism includes a steam production box 31, a steam turbine steam heating controller 35, a heating element, a water delivery pipe 32, and a steam inlet pipe 10.

[0065] The side end of the steam production box 31 is connected and communicated with the water delivery pipe 32. A water delivery pipe baffle 33 is tightly fitted and inserted on the pipe wall of the water delivery pipe 32; the bottom end of the water delivery pipe baffle 33 extends into the interior of the water delivery pipe 32. The water delivery pipe baffle 33 is used to prevent water vapor from escaping from the water delivery pipe 32.

[0066] The side end of the steam production box 31 is connected and communicated with one end of the steam inlet pipe 10; the other end of the steam inlet pipe 10 is connected and communicated with one side end of the work measurement box 1. A steam baffle 11 is tightly fitted and inserted on the pipe wall of the steam inlet pipe 10; the bottom end of the steam baffle 11 extends into the interior of the steam inlet pipe 10.

[0067] The condensed water outlet pipe 12 is used to export the condensed water in the work measurement box 1, and the condensed water baffle 13 is used as a control switch. When conducting work detection experiments in the work measurement box 1, the condensed water baffle 13 is closed to prevent steam from escaping.

[0068] The side end of the steam production box 31 is fixedly connected to the steam turbine steam heating controller 35. A plurality of heating elements are fixedly installed inside the steam production box 31; the input ends of the plurality of heating elements are electrically connected to the output end of the steam turbine steam heating controller 35.

[0069] The heating element can be a heating strip 34. The steam turbine steam heating controller 35 is connected to the heating strip 34 to control the power of the heating strip 34, which is used to change the water vapor evaporation efficiency in the steam production box 31.

[0070] The outer end face of the work measurement box 1 is fixedly connected to the cooling medium transmission mechanism. The cooling medium transmission mechanism includes a cooling medium conveying component and a cooling medium supply component.

[0071] The cooling medium delivery assembly includes a cooling water dispersion pipe 14, a cooling water intermediate pipe 15, a cooling water insertion baffle 16, a cooling hollow plate 17, a cooling water recovery pipe 18, and a cooling water outlet pipe 19;

[0072] One side end of the work measurement box 1 is respectively connected in communication with the cooling water dispersion pipe 14 and the cooling water recovery pipe 18. The other side end of the cooling water dispersion pipe 14 is respectively connected to a number of cooling water intermediate pipes 15; a cooling water insertion baffle 16 is tightly inserted and fitted on the pipe wall of each cooling water intermediate pipe 15; the bottom end of the cooling water insertion baffle 16 extends into the interior of the cooling water intermediate pipe 15.

[0073] The other side end of each cooling water intermediate pipe 15 is connected in communication with one end of the cooling hollow plate 17. A number of cooling hollow plates 17 are covered and arranged on the other three outer end faces of the work measurement box 1. The other ends of the number of cooling hollow plates 17 are connected in communication with the cooling water recovery pipe 18. The cooling water recovery pipe 18 is connected in communication with the cooling water outlet pipe 19.

[0074] The operator uses the cooling water dispersion pipe 14, the cooling hollow plate 17, and the cooling water recovery pipe 18 as the basic components of the cooling system, where the cooling water dispersion pipe 14 is used to disperse the cooling water into a number of cooling hollow plates 17, and the cooling water intermediate pipe 15 and the cooling water insertion baffle 16 are used as intermediate components for controlling the introduction of cooling water into the cooling hollow plate 17. After cooling, the cooling water is recovered by the cooling water recovery pipe 18 and discharged outward through the cooling water outlet pipe 19.

[0075] Among them, the basic cooling pipeline formed by the cooling water dispersion pipe 14, the cooling hollow plate 17, and the cooling water recovery pipe 18 is used to cool the steam in the work measurement box 1 through the cooling pipeline, so as to simulate the situation where the steam is cooled in actual use. And in combination with the components for power inspection, the power of the steam doing work step by step under the condition of heat energy loss can be seen in different cooling environments.

[0076] Among them, the cooling water intermediate pipe 15 and the cooling water insertion baffle 16 are used as intermediate components, mainly for facilitating the operator to control the number of cooling pipelines, thereby controlling the cooling efficiency and facilitating inspection.

[0077] The cooling water is discharged outward through the cooling water outlet pipe 19, and since its upper end side surface is inserted into the cooling water recovery pipe 18, it can better ensure that the retention time of the cooling water in the pipe is lengthened, ensuring the cooling efficiency.

[0078] The cooling medium supply assembly includes a cooling water pump outlet pipe 20, a bearing vertical plate 21, a sliding groove 22, a translation rod 23, a flow insertion plate 24, an extension plate 25, a water pump 29 assembly, and a cooling water inlet pipe 30.

[0079] One end of the outlet pipe 20 of the cooling water pump is connected and communicated with the lower end of the cooling water dispersion pipe 14. The other end of the outlet pipe 20 of the cooling water pump is connected to the cooling water inlet pipe 30. A water pump 29 assembly is fixedly installed on the outlet pipe 20 of the cooling water pump. The water pump 29 assembly includes a water pump housing 27, a water pump base, and a water pump 29. The water pump 29 is fixedly provided at the upper end of the water pump base 28; the water pump base 28 and the water pump 29 are located inside the water pump housing 27. A water pump 29 is installed on the outlet pipe 20 of the cooling water pump. The cooling water inlet pipe 30 is used as the inlet pipe for cooling water, and the water pump 29 pumps the cooling water into the outlet pipe 20 of the cooling water pump.

[0080] A through groove is provided on the end face of the pipe wall of the outlet pipe 20 of the cooling water pump; the upper end of the pipe wall of the outlet pipe 20 of the cooling water pump is fixedly connected to the bearing vertical plate 21; a sliding groove 22 is provided on the bearing vertical plate 21; a translation rod 23 is slidably provided on the bearing vertical plate 21 through the sliding groove 22; the side end of the translation rod 23 extending out of the bearing vertical plate 21 is fixedly connected to the extension plate 25. The extension plate 25 is threadedly connected to the bearing vertical plate 21, such as a screw 26. The lower end of the translation rod 23 is fixedly connected to the flow insertion plate 24; the flow insertion plate 24 is tightly fitted and inserted into the outlet pipe 20 of the cooling water pump through the through groove on the pipe wall of the outlet pipe 20 of the cooling water pump; the bottom end of the flow insertion plate 24 extends into the interior of the outlet pipe 20 of the cooling water pump.

[0081] The operator uses the outlet pipe 20 of the cooling water pump to convey cooling water into the cooling water dispersion pipe 14, and uses the translation rod 23 connected to the bearing vertical plate 21 and the sliding groove 22 to drive the flow insertion plate 24 to be inserted downward and change the inner diameter of the pipe, so as to control the flow rate of the cooling water, and uses the position fixing bolt on the extension plate 25 to fix the insertion depth of the flow insertion plate 24 to ensure the stability of the flow rate inside the pipe.

[0082] Among them, the outlet pipe 20 of the cooling water pump is used as the control pipe for the flow rate, and the insertion depth of the flow insertion plate 24 into the outlet pipe 20 of the cooling water pump is used to control the flow rate inside the pipe, thereby controlling the flow rate of the cooling water, which plays an auxiliary role in adjusting and maintaining the cooling efficiency.

[0083] The bearing vertical plate 21 and the sliding groove 22 are used to carry and connect the translation rod 23, and drive the flow insertion plate 24 to be inserted downward through the translation rod 23. The movement track is limited by the sliding groove 22 to make the translation smoother.

[0084] The extension plate 25 is used as an extension component, and the position of the flow insertion plate 24 is fixed by the screw 26 to assist in maintaining the cooling efficiency and facilitate the operation of the operator.

[0085] The condensate baffle 13, the cooling water insertion baffle 16, the flow insertion plate 24, the water delivery pipe baffle 33, and the steam baffle 11 are all tightly fitted and inserted into their respective pipes. Due to the tight fit and insertion, after the condensate baffle 13, the cooling water insertion baffle 16, the flow insertion plate 24, the water delivery pipe baffle 33, and the steam baffle 11 are each slid and adjusted to a certain position, their positions can be fixed by virtue of the clamping force between the condensate baffle 13, the cooling water insertion baffle 16, the flow insertion plate 24, the water delivery pipe baffle 33, the steam baffle 11 and the respective pipes.

[0086] The present invention also provides a calibration method for a calibration device of a power plant steam turbine controller, including the following steps:

[0087] S1: The heating element heats the water contained inside the steam production tank 31, and the steam generated by the heating is introduced into the work measurement tank 1;

[0088] S2: The work measurement tank 1 is filled with steam, and the filled steam will lift the sliding lifting plate 2. The lifting height is observed and recorded by using the pointer 8 and the scale 7 connected to the sliding lifting plate 2. The recorded height combined with the weight on the sliding lifting plate 2 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, and thus the output power of the steam heating controller 35 of the steam turbine is inversely deduced.

[0089] S3: The externally surrounded cooling hollow plate 17 cools the device of the work measurement tank 1. The cooling efficiency is controlled by controlling the flow rate of the cooling water and the number of the cooling hollow plates 17, so as to change the heat consumption rate in the work measurement tank 1. Through multiple tests and repeating the process of S2, the work efficiency under different heat losses is recorded, and thus the change of the output power of the steam heating controller 35 of the steam turbine is inversely deduced.

[0090] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. A calibration device for a steam turbine controller of a power plant, comprising a work measurement box (1); characterized in that: One side end of the work measurement box (1) is connected to the steam supply mechanism; the outer end surface of the work measurement box (1) is fixedly connected to the cooling medium transmission mechanism; a calibration mechanism is provided inside the work measurement box (1); the calibration 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 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); The steam supply mechanism comprises a steam manufacturing box (31), a steam turbine steam heating controller (35), a heating element, a water pipe (32) and a steam introduction pipe (10); the side end of the steam manufacturing box (31) is connected to the water pipe (32); the side end of the steam manufacturing box (31) is connected to one end of the steam introduction pipe (10); the other end of the steam introduction pipe (10) is connected to one side end of the work measurement box (1); the side end of the steam manufacturing box (31) is fixedly connected to the steam turbine steam heating controller (35); a plurality of heating elements are fixedly installed inside the steam manufacturing box (31); the input ends of the plurality of heating elements are electrically connected to the output ends of the steam turbine steam heating controller (35); The calibration device of the power plant steam turbine controller adopts the following calibration method, including the steps of: S1: The heating element heats the water contained in the steam production box (31), and the steam generated by the heating is introduced into the work measurement box (1); S2: The work measurement box (1) is filled with steam. The steam raises the sliding lifting plate (2) and uses a pointer (8) and a scale (7) connected to the sliding lifting plate (2) to observe and record the value of the raised height. The recorded height combined with the weight on the sliding lifting plate (2) 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 turbine steam heating controller (35); S3: The cooling hollow plate (17) surrounding the outside realizes cooling of the device of the work measurement box (1). The cooling efficiency is controlled by controlling the flow rate of cooling water and the number of cooling hollow plates (17), thereby changing the heat consumption rate in the work measurement box (1). Multiple tests are carried out 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 (35).

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 4, characterized in that: A water pipe baffle (33) is tightly fitted and plugged into the pipe wall of the water pipe (32); the bottom end of the water pipe baffle (33) extends into the interior of the water pipe (32); A steam baffle (11) is tightly fitted and plugged into 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).

6. The calibration equipment for a power plant steam turbine controller according to claim 3, characterized in that: The cooling medium transmission mechanism includes a cooling medium delivery component and a cooling medium supply component.

7. The calibration equipment for a power plant steam turbine controller according to claim 6, characterized in that: The cooling medium conveying assembly comprises a cooling water dispersion pipe (14), a cooling water intermediate pipe (15), a cooling water plug-in baffle (16), a cooling hollow plate (17), a cooling water recovery pipe (18) and a cooling water outlet pipe (19); One side end of the work measurement box (1) is connected to the cooling water dispersion pipe (14) and the cooling water recovery pipe (18) respectively; The other side ends of the cooling water dispersion pipes (14) are respectively connected to a plurality of cooling water intermediate pipes (15); a cooling water plug-in baffle (16) is tightly plugged into the pipe wall of each cooling water intermediate pipe (15); the bottom end of the cooling water plug-in baffle (16) extends into the interior of the cooling water intermediate pipe (15); The other side end of the cooling water intermediate pipe (15) is connected to one end of the cooling hollow plate (17); a plurality of cooling hollow plates (17) are coated on the outer end surface of the work measurement box (1); The other end of the cooling hollow plate (17) is connected to the cooling water recovery pipe (18); The cooling water recovery pipe (18) and the cooling water outlet pipe (19) are in communication with each other.

8. The calibration equipment for a power plant steam turbine controller according to claim 7, characterized in that: The cooling medium supply assembly comprises a cooling water pump outlet pipe (20), a bearing vertical plate (21), a sliding groove (22), a translation rod (23), a flow plug-in plate (24), an extension plate (25), a water pump (29) assembly and a cooling water inlet pipe (30); One end of the cooling water pump outlet pipe (20) is connected to the lower end of the cooling water dispersion pipe (14); The other end of the cooling water pump outlet pipe (20) is connected to the cooling water inlet pipe (30); A water pump (29) assembly is fixedly mounted on the cooling water pump outlet pipe (20); A through groove is provided on the end surface of the tube wall of the cooling water pump outlet pipe (20); the upper end of the tube wall of the cooling water pump outlet pipe (20) is fixedly connected to the bearing vertical plate (21); the sliding groove (22) is provided on the bearing vertical plate (21); the translation rod (23) is slidably provided on the bearing vertical plate (21) through the sliding groove (22); the side end of the translation rod (23) extending out of the bearing vertical plate (21) is fixedly connected to the extension plate (25); the extension plate (25) and the bearing vertical plate (21) are threadedly connected; the lower end of the translation rod (23) is fixedly connected to the flow plug-in plate (24); the flow plug-in plate (24) is tightly plugged into the tube wall of the cooling water pump outlet pipe (20) through the through groove; the bottom end of the flow plug-in plate (24) extends into the interior of the cooling water pump outlet pipe (20).

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