Protection device for travel switch of main throttle valve

Abstract

The invention discloses a main throttle valve travel switch protection device. The heat insulation device comprises a heat insulation part which comprises a first heat insulation plate arranged on a base; the heat insulation frame is arranged at the top of the first heat insulation plate, and a cavity is formed in the heat insulation frame; the heat dissipation part comprises an air cooling assembly and is rotationally arranged in the cavity; the water cooling assembly is arranged on one side of the heat insulation frame and rotationally connected with the air cooling assembly; when the main throttle valve generates high temperature, the first heat insulation plate preliminarily obstructs part of heat transferred by the base, then the water cooling assembly conveys a cooling medium to the heat insulation frame while air flow is conveyed into the heat insulation frame through the air cooling assembly, so that the heat insulation frame is cooled, the switch unit is prevented from making direct contact with the high temperature, and meanwhile the heat dissipation efficiency of the switch unit is improved; the service life is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of steam turbines, and particularly to a main steam valve travel switch protection device. Background Art

[0002] A steam turbine is a thermal engine that converts the thermal energy of steam into mechanical energy. It can convert the internal energy of water vapor into rotational kinetic energy, and then drive a generator to rotate to generate electricity. It is commonly used in technical fields such as the power industry and ship power.

[0003] The travel switch of a steam turbine is usually arranged on the base of its main steam valve. The high temperature generated during the actual operation of the steam turbine will be conducted to the switch body through the main steam valve base, resulting in its long-term exposure to a high-temperature environment, which is likely to cause problems such as signal distortion, contact oxidation, and even burnout, affecting the service life of the switch.

[0004] Therefore, a main steam valve travel switch protection device that can improve the heat dissipation efficiency of the travel switch is proposed to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a main steam valve travel switch protection device aiming at the above deficiencies at present, so as to improve the heat dissipation efficiency of the travel switch.

[0006] To solve the above technical problems, the present invention adopts the following technical solutions: A main steam valve travel switch protection device includes a heat insulation component, including a first heat insulation plate arranged on the base;

[0007] A heat insulation frame is arranged on the top of the first heat insulation plate, and a chamber is opened inside it. The switch unit is arranged above the heat insulation frame;

[0008] A heat dissipation component includes an air-cooling component rotatably arranged in the chamber for delivering air flow into the chamber;

[0009] A water-cooling component is arranged on one side of the heat insulation frame and is rotatably connected to the air-cooling component. The water-cooling component drives the cooling medium to flow into the chamber through the rotation of the air-cooling component.

[0010] Further, one end of the chamber is provided with an air outlet communicating with the outside, and the other end is provided with an air inlet;

[0011] The air-cooling component includes a transmission rod axially passing through the chamber and rotatably connected to the heat insulation frame;

[0012] Fan blades are arranged on the transmission rod and located at the air outlet;

[0013] A power unit is arranged at one end of the heat insulation frame close to the air inlet for driving the transmission rod to rotate.

[0014] Further, a cavity is formed in the transmission rod, and a plurality of spray heads communicating with the cavity are circumferentially and evenly distributed on the surface of the transmission rod;

[0015] The water cooling assembly includes a water delivery pipe rotatably sleeved on one end of the transmission rod close to the fan blade and communicating with the cavity.

[0016] Further, a storage cavity for storing a cooling medium is formed in the first heat insulation plate;

[0017] A diversion port communicating with the storage cavity is formed at the bottom of the heat insulation frame.

[0018] Further, the heat insulation component further includes a second heat insulation plate disposed between the heat insulation frame and the switch unit, for carrying the switch unit and blocking heat;

[0019] A plurality of support frames extending along the axial direction of the heat insulation frame are equally spaced between the second heat insulation plate and the heat insulation frame, and a diversion gap is formed between adjacent support frames.

[0020] Further, an opening for communicating the chamber with each of the diversion gaps is formed at the top of the heat insulation frame.

[0021] Further, a plurality of air guide plates are spirally distributed in the chamber for guiding the air flow in the chamber to be output spirally.

[0022] Further, a detection component is provided at the top of the second heat insulation plate, including a detection unit, which is signal-connected to a control unit and is used for real-time monitoring of the plate surface temperature of the second heat insulation plate and generating a feedback signal;

[0023] A buzzer, which is signal-connected to the control unit, and when the temperature exceeds a predetermined value, the buzzer receives the signal and gives an alarm.

[0024] The beneficial effects of the present invention are embodied in:

[0025] In the present invention, through the cooperation of the heat insulation frame and the heat dissipation component, when the main steam valve generates high temperature, the first heat insulation plate initially blocks part of the heat transmitted by the base, and then while the air cooling component conveys air flow into the heat insulation frame, the water cooling component conveys a cooling medium to the heat insulation frame to cool it, avoiding the switch unit directly contacting the high temperature, and at the same time improving the heat dissipation efficiency of the switch unit and prolonging its service life. Description of the Drawings

[0026] Figure 1 It is a perspective view of the main steam valve travel switch protection device described in the present invention;

[0027] Figure 2 It is a cross-sectional view of the main steam valve travel switch protection device described in the present invention.

[0028] In the figure:

[0029] 01, Base; 02, Switch unit; 1, Heat insulation component; 11, First heat insulation plate; 111, Storage cavity; 12, Heat insulation rack; 121, Chamber; 122, Air outlet; 123, Air inlet; 124, Diversion port; 125, Opening; 13, Second heat insulation plate; 14, Support frame; 15, Water outlet pipe; 2, Heat dissipation component; 21, Air-cooling assembly; 211, Transmission rod; 2111, Cavity; 212, Fan blade; 213, Power unit; 214, Sprinkler head; 22, Water-cooling assembly; 221, Water delivery pipe; 3, Control valve; 4, Diversion gap; 5, Air guide plate; 6, Detection component; 61, Detection unit; 62, Buzzer. Detailed implementation manners

[0030] 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. Without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0031] Please refer to Figure 1-2 , the present invention discloses a main steam valve travel switch protection device, including a heat insulation component 1, including a first heat insulation plate 11 disposed on a base 01 for blocking the heat generated by the base 01;

[0032] A heat insulation rack 12 is disposed on the top of the first heat insulation plate 11, and a chamber 121 is opened inside thereof. The switch unit 02 is disposed above the heat insulation rack 12 for supporting the switch unit 02;

[0033] A heat dissipation component 2, including an air-cooling assembly 21, is rotatably disposed in the chamber 121 for delivering air flow into the chamber 121;

[0034] A water-cooling assembly 22 is disposed on one side of the heat insulation rack 12, and one end thereof is rotatably connected to the air-cooling assembly 21, and the other end is connected to an external cooling component (not shown in the figure). The cooling component is used to deliver a cooling medium to the water-cooling assembly 22. The water-cooling assembly 22 drives the cooling medium to flow into the chamber 121 through the rotation of the air-cooling assembly 21.

[0035] In specific implementation, when the main steam valve is working, the first heat insulation plate 11 is in direct contact with the base 01 and initially blocks the heat generated by the base 01. The air-cooling component 21 works and drives the external air flow to blow into the chamber 121, so that the air flow exchanges heat with the heat insulation frame 12 to dissipate heat from the heat insulation frame 12. At the same time, the air-cooling component 21 drives the water-cooling component 22 to spray the cooling medium onto the inner wall of the chamber 121, thereby further improving the heat dissipation efficiency of the heat insulation frame 12 to prevent the switching unit 02 from directly contacting the high temperature.

[0036] In the present invention, through the cooperation of the heat insulation frame 12 and the heat dissipation component 2, when the main steam valve generates high temperature, the first heat insulation plate 11 initially blocks part of the heat transferred by the base 01. Subsequently, while the air-cooling component 21 conveys the air flow into the heat insulation frame 12, the water-cooling component 22 conveys the cooling medium to the heat insulation frame 12 to cool it, preventing the switching unit 02 from directly contacting the high temperature, and at the same time improving the heat dissipation efficiency of the switching unit 02 and extending its service life.

[0037] It should be noted that the cooling component can use a branch of the existing cooling system of the steam turbine for auxiliary cooling.

[0038] Preferably, the cooling medium can use cooling water.

[0039] In one embodiment, one end of the chamber 121 is provided with an air outlet 122 communicating with the outside, and the other end is provided with an air inlet 123;

[0040] The air-cooling component 21 includes a transmission rod 211 axially penetrating through the chamber 121 and rotatably connected thereto. One end of the transmission rod 211 close to the air outlet 122 is provided with a fan blade 212, and the fan blade 212 is used to introduce external air into the chamber 121;

[0041] One end of the heat insulation frame 12 close to the air inlet 123 is provided with a power unit 213, and the moving end of the power unit 213 is connected to the transmission rod 211 for driving the transmission rod 211 to rotate.

[0042] With such a design, when it is necessary to dissipate heat from the heat insulation frame 12, the power unit 213 drives the fan blade 212 to rotate through the transmission rod 211, so that the fan blade 212 introduces the external air flow into the chamber 121 through the air inlet 123 to exchange heat with the heat insulation frame 12, and the air flow after heat exchange is blown out of the heat insulation frame 12 through the air outlet 122.

[0043] In one embodiment, a cavity 2111 is provided in the transmission rod 211, and a plurality of nozzles 214 communicating with the cavity 2111 are circumferentially and uniformly distributed on the surface of the transmission rod 211;

[0044] The water-cooling assembly 22 includes a water delivery pipe 221 rotatably sleeved on one end of the transmission rod 211 close to the fan blade 212 and communicating with the cavity 2111. The water inlet of the water delivery pipe 221 is connected to a cooling component for delivering a cooling medium into the cavity 2111.

[0045] With such a design, when the transmission rod 211 rotates, the water delivery pipe 221 delivers the cooling medium into the cavity 2111. At this time, each nozzle 214 opens, and the cooling medium is evenly thrown onto the inner wall of the chamber 121 by the centrifugal force generated by the rotation of the transmission rod 211, enabling it to exchange heat with the heat insulation frame 12.

[0046] In one embodiment, a storage cavity 111 for storing the cooling medium is formed in the first heat insulation plate 11. A water outlet pipe 15 is provided on one side of the storage cavity 111 and communicates with an external recovery pipe (not shown in the figure). A control valve 3 for controlling the on / off of the flow path is further provided on the water outlet pipe 15.

[0047] A diversion port 124 communicating with the storage cavity 111 is formed at the bottom of the heat insulation frame 12 for guiding the cooling medium in the chamber 121 into the storage cavity 111.

[0048] With such a design, when the transmission rod 211 rotates and sprays the cooling medium into the chamber 121, the cooling medium that has exchanged heat with the heat insulation frame 12 flows along the outer wall of the chamber 121 into the storage cavity 111 under the guidance of gravity. At this time, the cooling medium still has sufficient cooling temperature, so it accumulates in the storage cavity 111 and cools the first heat insulation plate 11. When a predetermined amount of cooling medium is stored in the cavity, the control valve 3 opens the water outlet pipe 15, enabling the cooling medium to be discharged from the first heat insulation plate 11.

[0049] It should be noted that the water discharge amount of the water outlet pipe 15 corresponds to the total spraying amount of each nozzle 214, so that a predetermined amount of cooling medium always exists in the storage cavity 111 to cool the first heat insulation plate 11.

[0050] In one embodiment, the heat insulation component 1 further includes a second heat insulation plate 13 disposed between the heat insulation frame 12 and the switch unit 02 for carrying the switch unit 02 and blocking heat.

[0051] A plurality of support frames 14 extending along the axial direction of the heat insulation frame 12 are equally spaced between the second heat insulation plate 13 and the heat insulation frame 12. A diversion gap 4 is formed between adjacent support frames 14. When the fan blade 212 rotates, the fan blade 212 can guide external air flow into each diversion gap 4.

[0052] With such a design, when the fan blade 212 rotates, the fan blade 212 guides the external air flow to blow into each diversion gap 4, so that a plurality of air ducts for dissipating heat from the second heat insulation plate 13 are formed between the second heat insulation plate 13 and the heat insulation frame 12, so that the air flow can exchange heat with the residual heat transferred from the heat insulation frame 12 to the second heat insulation plate 13, further improving the heat dissipation effect.

[0053] In one embodiment, an opening 125 communicating the chamber 121 with each diversion gap 4 is formed at the top of the heat insulation frame 12.

[0054] With such a design, when the air flow enters each diversion gap 4 and exchanges heat with the second heat plate and the support plate, the temperature of the air flow begins to rise and the heat exchange efficiency decreases. At this time, a part of the air flow in the chamber 121 is blown into each diversion gap 4 through the opening 125, so as to improve the heat dissipation efficiency of the second heat insulation plate 13 and one end of each support frame 14 away from the air outlet 122 of each diversion gap 4.

[0055] In one embodiment, a plurality of air guiding plates 5 are spirally distributed in the chamber 121 for guiding the air flow in the chamber 121 to output spirally.

[0056] With such a design, when the air flow enters the chamber 121, each air guiding plate 5 guides the air flow to be spirally conveyed in the chamber 121, so that the air flow exchanges heat with the heat insulation frame 12 more evenly.

[0057] In one embodiment, a detection component 6 is provided at the top of the second heat insulation plate 13, including a detection unit 61, which is signal-connected to the control unit and is used for monitoring the plate surface temperature in real time and generating a feedback signal;

[0058] A buzzer 62, which is signal-connected to the control unit. When the temperature exceeds a predetermined value, the detection unit 61 signals to the control unit to make the buzzer 62 emit an alarm.

[0059] With such a design, when the detection unit 61 detects that the temperature of the second heat insulation plate 13 is higher than the predetermined value, there is a risk of overheating in the switch unit 02. At this time, the detection unit 61 sends a signal to the control unit to make the buzzer 62 emit an alarm to notify the staff to deal with it. When the temperature of the second heat insulation plate 13 drops below the predetermined value, the detection unit 61 no longer sends a signal to the control unit and the buzzer 62 stops working.

[0060] Preferably, the detection unit 61 can adopt an infrared temperature sensor in the prior art.

[0061] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present invention, the directional indications are only used to explain the relative positional relationship, movement conditions, etc. between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0062] In addition, if there are descriptions such as "first", "second", etc. involved in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0063] In addition, "a plurality of" means more than two.

[0064] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A main steam valve travel switch protection device, characterized in that, It includes a heat insulation component (1), which includes a first heat insulation plate (11) arranged on a base (01); A heat insulation rack (12) is arranged on the top of the first heat insulation plate (11), and a chamber (121) is formed inside it. A switch unit (02) is arranged above the heat insulation rack (12); A heat dissipation component (2), which includes an air cooling assembly (21) rotatably arranged in the chamber (121) for delivering air flow into the chamber (121); A water cooling assembly (22) is arranged on one side of the heat insulation rack (12) and is rotatably connected to the air cooling assembly (21). The water cooling assembly (22) is driven by the rotation of the air cooling assembly (21) to drive a cooling medium to flow into the chamber (121).

2. The main steam valve travel switch protection device according to claim 1, wherein: One end of the chamber (121) is provided with an air outlet (122) communicating with the outside, and the other end is provided with an air inlet (123); The air cooling assembly (21) includes a transmission rod (211) axially passing through the chamber (121) and rotatably connected to the heat insulation rack (12); Fan blades (212) are arranged on the transmission rod (211) and are located at the air outlet (122); A power unit (213) is arranged at one end of the heat insulation rack (12) close to the air inlet (123) for driving the transmission rod (211) to rotate.

3. The main steam valve travel switch protection device according to claim 2, characterized in that: A cavity (2111) is formed in the transmission rod (211), and a plurality of nozzles (214) communicating with the cavity (2111) are circumferentially and evenly distributed on the surface of the transmission rod (211); The water cooling assembly (22) includes a water delivery pipe (221) rotatably sleeved on one end of the transmission rod (211) close to the fan blades (212) and communicating with the cavity (2111).

4. The main steam valve travel switch protection device according to claim 1, characterized in that: A storage cavity (111) for storing a cooling medium is formed in the first heat insulation plate (11); A diversion port (124) communicating with the storage cavity (111) is formed at the bottom of the heat insulation rack (12).

5. The main steam valve travel switch protection device according to claim 1, characterized in that: The heat insulation component (1) further includes a second heat insulation plate (13) arranged between the heat insulation rack (12) and the switch unit (02) for carrying the switch unit (02) and blocking heat; A plurality of support frames (14) axially extending along the heat insulation rack (12) are equally spaced between the second heat insulation plate (13) and the heat insulation rack (12), and a diversion gap (4) is formed between adjacent support frames (14).

6. The main steam valve travel switch protection device according to claim 5, characterized in that: An opening (125) for communicating the chamber (121) with each diversion gap (4) is formed at the top of the heat insulation rack (12).

7. The main steam valve travel switch protection device according to claim 1, characterized in that: A plurality of wind guiding plates (5) are spirally distributed in the chamber (121) for guiding the air flow in the chamber (121) to be output spirally.

8. The main steam valve travel switch protection device according to claim 5, characterized in that: A detection component (6) is arranged at the top of the second heat insulation plate (13), which includes a detection unit (61) signal-connected to a control unit for real-time monitoring of the plate temperature of the second heat insulation plate (13) and generating a feedback signal; A buzzer (62) is signal-connected to the control unit. When the temperature exceeds a predetermined value, the buzzer (62) receives the signal and gives an alarm.

Images