Emergency water escape valve for indirect air cooling system

Abstract

The emergency water escape valve for the indirect air cooling system comprises a heavy hammer mechanism, a first hydraulic supporting mechanism and a second hydraulic supporting mechanism, the heavy hammer mechanism comprises a heavy hammer and a heavy hammer arm which are connected, one end of the heavy hammer arm is connected with the heavy hammer, and the other end of the heavy hammer arm is connected with the emergency water escape valve through a connecting rod mechanism; the first hydraulic supporting mechanism and / or the second hydraulic supporting mechanism are / is connected with the heavy hammer mechanism and drive the heavy hammer mechanism to swing so as to drive the emergency water escape valve to be opened and closed, the first hydraulic supporting mechanism is connected with the end, away from the heavy hammer, of the heavy hammer arm through the connecting rod mechanism, and the second hydraulic supporting mechanism is connected to the lower portion of the heavy hammer arm. On the basis of an original hydraulic supporting mechanism, a set of hydraulic supporting mechanism is additionally arranged on the heavy hammer arm, dual acting force is formed by the hydraulic supporting mechanism and the original hydraulic supporting mechanism, normal opening and closing of the emergency water escape valve are guaranteed, and safe and reliable operation of an indirect air cooling circulating water system is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of air cooling systems, and in particular to an emergency drain valve for an indirect air cooling system. Background Art

[0002] The 2×660MW units in this project use an indirect air cooling system to cool the main steam turbine, steam-driven feedwater pump and steam-driven induced draft fan. The two units are equipped with 2 natural ventilation intercooling towers and 2 mechanical ventilation cooling towers, and their air cooling radiators are arranged vertically. The basic principle of the configuration of natural ventilation intercooling towers and mechanical ventilation intercooling towers is: natural ventilation intercooling towers operate all year round, and mechanical ventilation intercooling towers are in principle used for summer high load and unit load regulation. Figure 1 As shown in the figure, the indirect air cooling system adopts a unit system, and each unit is equipped with 3 circulating water pumps, 1 natural ventilation intercooling tower, and 1 mechanical ventilation intercooling tower. Each natural ventilation intercooling tower and 1 mechanical ventilation intercooling tower are respectively equipped with a set of circulating water inlet / outlet pipes and expansion water tanks. Two units are equipped with a circulating water pump room, which is arranged near the natural ventilation intercooling tower.

[0003] Each unit of the mechanical ventilation air-cooling tower uses a DN1200 circulating water main pipe to enter the tower, and a DN1200 circulating water cooling water pipe to exit the tower. Each unit is equipped with 8 fan units, and the fan units are arranged back to back with single-side air inlet. There are 16 fan units in total for the two units, which are arranged continuously. Each fan unit contains 4 cooling triangles. The cooling triangle adopts an all-aluminum double-flow six-row air-cooling tube bundle, and each cooling triangle inlet is equipped with an adjustable opening shutter. Two adjacent shutters are controlled by a regulating actuator.

[0004] The surface condensing indirect air cooling system consists of a surface condensing condenser, a circulating water pump, a radiator, a natural ventilation air cooling tower, a circulating water pipe, etc. One unit is equipped with a set of condensers, three circulating pumps, an indirect cooling tower and corresponding radiators, a circulating water inlet pipe and a circulating water outlet pipe, etc. The process system in the air cooling tower consists of a heat dissipation cooling system, a filling and drainage system, a make-up water system, an exhaust system, a radiator cleaning system and pipes, etc.

[0005] In order to achieve uniform water distribution for each cooling fan section and reduce the head loss of the pipeline, the cooling fan sections adopt parallel water distribution, that is, every 4 cooling fan sections form a water distribution system, which is connected in parallel with the water distribution systems of the other 4 cooling fan sections.

[0006] In order to facilitate inspections by operating personnel and valve overhaul and maintenance, the inlet and outlet valves, drain valves, bypass valves and emergency drain valves of the cooling fan section are arranged above the ground, and other valves that must be arranged underground due to process requirements are arranged in the valve well.

[0007] Indirect air cooling circulating water emergency drain system Figure 2The antifreeze protection of the cooling element of the indirect air-cooled radiator is completed by two emergency drain valves installed on the circulating water inlet main pipe and the return main pipe. When the emergency antifreeze alarm occurs, the two valves will be opened. In addition, when the temperature is too low, the sector will automatically drain water.

[0008] The emergency drain valve of the indirect air cooling system adopts a hydraulically controlled butterfly valve controlled by a heavy hammer one-way hydraulic cylinder produced by VAG of Germany. Figure 3 As shown, the oil pressure of the hydraulic control system is controlled by the high and low pressure switches to start and stop the oil pump, automatically maintaining the oil pressure of the hydraulic system at a constant value to ensure the stable operation of the hydraulically controlled butterfly valve.

[0009] In order to prevent the heat exchanger from freezing in an emergency, the emergency drain valves of the inlet and return pipes must be opened at the same time. The emergency drain valve opening command can be opened manually through the button on the operation screen. When a fault occurs during the normal drain process, if the ambient air temperature is lower than 2°C (freezing risk) and at least one sector contains water, and all circulating water pumps are stopped, the emergency drain valve will automatically open to prevent large-scale freezing of the radiator in abnormal winter conditions.

[0010] The normal working pressure of the hydraulic system of the hydraulic butterfly valve controlled by the heavy hammer type one-way hydraulic cylinder is as high as 16.5MPa, and all the hydraulic components of the hydraulic control system are sealed with rubber seals. If the seals of these hydraulic components are aged or damaged, the hydraulic system will leak oil and release pressure. If the piston seal of the hydraulic cylinder is aged and damaged, it will also cause the hydraulic system to leak oil, because the swing cylinder of the hydraulic control system of the hydraulic butterfly valve swings back and forth during the switching process. The hydraulic oil station and the swing cylinder can only be connected with high-pressure rubber hoses. The connecting lock nut of the high-pressure rubber hose will also leak due to the sealing ring or sealing gasket. The compression joint of the high-pressure rubber hose may leak to varying degrees due to the quality of the crimping as the running time increases. In addition, the high-pressure rubber hose will also age and leak as the running time increases. All these uncontrollable factors will cause the hydraulic butterfly valve to fail to open, resulting in the hydraulic system to stop operating due to water leakage. Moreover, once these faults occur, the low-pressure switch of the hydraulic control system of the hydraulic butterfly valve will open, automatically maintain the stability of the system pressure, and automatically control the hydraulic oil pump to start the system to charge the pressure, while the high-pressure hydraulic oil of the system will leak out without restriction. Within ten minutes or even a few minutes, the hydraulic oil of the hydraulic system will leak out completely. Under the gravity of the heavy hammer, the hydraulic butterfly valve will open the valve butterfly, the circulating water system will be interrupted, and the unit will stop operating. When the hydraulic system is seriously depressurized, the hydraulic system oil pressure will drop directly, and the hydraulic butterfly valve will open directly under the action of the heavy hammer.

[0011] In order to ensure that the emergency drain valve can be opened safely to drain water when the ambient temperature is low in winter, so as to ensure the safe operation of the indirect air cooling system radiator in winter, the solenoid valve of the emergency drain valve hydraulic control system adopts a normally energized solenoid valve (open when power is lost). If the solenoid valve of the emergency drain valve hydraulic control system adopts a normally de-energized solenoid valve, if the control system loses power, the hydraulic control butterfly valve will not operate when the emergency drain hydraulic control butterfly valve needs to be opened in winter, which will eventually cause the indirect air cooling system radiator to freeze over a large area due to the inability to drain water urgently. If a normally energized solenoid valve is used, the emergency and safe drain of the indirect air cooling radiator can be guaranteed in winter, but there are also some uncontrollable safety hazards. For example, the wire ring of the normally energized solenoid valve burns during normal operation, the control circuit is accidentally disconnected, or the solenoid valve body fails, which will cause the emergency drain valve to open accidentally and the circulating water system to drain water, thereby causing the unit to shut down.

[0012] In order to ensure the reliability of the emergency water discharge hydraulic butterfly valve in the circulating water system during winter operation, it is necessary to take any compulsory measures to open the emergency water discharge valve. Otherwise, it will be impossible to avoid or reduce the potential safety hazard of the emergency water discharge valve accidentally opening due to a hydraulic control system failure, which will cause the circulating water to be discharged and the unit to be forced to shut down.

[0013] To summarize, in order to ensure that the emergency water discharge hydraulically controlled butterfly valve can ensure emergency water discharge in unexpected situations in winter, ensure that the indirect air-cooled radiator can safely survive the winter without large-scale freezing, it is necessary to optimize and improve the safety and reliability of the emergency water discharge valve of the inlet and return main pipe of the indirect air-cooled circulating water system. Summary of the invention

[0014] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. To this end, an embodiment of the present invention provides an emergency drain valve for an indirect air cooling system, which ensures that the emergency drain valve is opened and closed normally when the original hydraulic support mechanism fails.

[0015] On the one hand, an embodiment of the present invention proposes a control mechanism for an emergency water discharge valve, including: a weight mechanism, a first hydraulic support mechanism and a second hydraulic support mechanism, the weight mechanism includes a connected weight and a weight arm, one end of the weight arm is connected to the weight, and the other end of the weight arm is connected to the emergency water discharge valve through a connecting rod mechanism; the first hydraulic support mechanism and / or the second hydraulic support mechanism are connected to and drive the weight mechanism to swing, thereby driving the opening and closing of the emergency water discharge valve, the first hydraulic support mechanism is connected to the end of the weight arm away from the weight through a connecting rod mechanism, and the second hydraulic support mechanism is connected to the bottom of the weight arm.

[0016] In some embodiments, the first hydraulic support mechanism includes a first cylinder body and a first hydraulic rod connected to each other, the top end of the first hydraulic rod is connected to a weight arm through a connecting rod mechanism and controls the swing of the weight mechanism, thereby driving the opening and closing of the emergency drain valve; the second hydraulic support mechanism includes a second cylinder body and a second hydraulic rod connected to each other, the second cylinder body is connected to the ground or platform through a first hinge, the top end of the second hydraulic rod is connected to the weight arm through a second hinge, and the extension and retraction of the second hydraulic rod drives the weight mechanism to swing, thereby driving the opening and closing of the emergency drain valve.

[0017] In some embodiments, the end of the weight arm away from the weight is connected to the emergency drain valve via a weight shaft.

[0018] In some embodiments, the first hinge is fixedly connected to the ground or platform via an embedded part.

[0019] In some embodiments, the first cylinder body is connected to the oil tank through a first hydraulic pipeline, and a first shut-off valve and a first opening flow regulating valve are connected to the first hydraulic pipeline. The second cylinder body is connected to the oil tank through a second hydraulic pipeline, and a second shut-off valve and a second opening flow regulating valve are connected to the second hydraulic pipeline. The switching valve speeds of the first opening flow regulating valve and the second opening flow regulating valve are consistent.

[0020] In some embodiments, the second hydraulic pipeline is connected to the oil tank through an electric hydraulic branch and a manual hydraulic branch respectively, the electric hydraulic branch and the manual hydraulic branch are connected in parallel, the electric hydraulic branch is connected to an electric oil pump and a first one-way valve, and the manual hydraulic branch is connected to a manual oil pump and a second one-way valve.

[0021] In some embodiments, a pressure relief branch is connected between the second hydraulic pipeline and the oil tank, and a manual valve closing regulating valve and a normally-electric solenoid valve are connected to the pressure relief branch. The manual valve closing regulating valve is arranged upstream of the normally-electric solenoid valve and close to the normally-electric solenoid valve. When the normally-electric solenoid valve is energized, the normally-electric solenoid valve is in a disconnected state. When the normally-electric solenoid valve loses power, the normally-electric solenoid valve is in a connected state. The first hydraulic pipeline and the second hydraulic pipeline have the same configuration, and the normally-electric solenoid valve of the first hydraulic pipeline is linked with the normally-electric solenoid valve of the second hydraulic pipeline.

[0022] In some embodiments, the second hydraulic support mechanism is controlled by an independent power supply and is connected to an independent UPS power supply, and the power supplies of the second hydraulic support mechanism and the first hydraulic support mechanism are in different safety sections.

[0023] A second embodiment of the present invention provides an emergency drain valve, comprising the above-mentioned control mechanism.

[0024] The third aspect of the present invention provides an application of the above-mentioned emergency drain valve in an indirect air cooling system. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings.

[0026] in:

[0027] Figure 1 It is a process flow chart of an indirect air cooling system in the prior art;

[0028] Figure 2 It is a schematic diagram of an emergency water discharge system for indirect air-cooling circulating water in the prior art;

[0029] Figure 3 It is a structural schematic diagram of a control mechanism of an emergency drain valve of an indirect air cooling system in the prior art;

[0030] Figure 4 Schematic diagram of the structure of the control mechanism of the emergency drain valve in the embodiment of the present invention;

[0031] Figure 5 It is a structural schematic diagram of embedded parts;

[0032] Figure 6 for Figure 4 A schematic structural diagram of the second hinged member in FIG.

[0033] Figure 7 for Figure 6 AA section view in;

[0034] Figure 8 is a structural schematic diagram of a hydraulic system of a second hydraulic support mechanism;

[0035] Reference numerals:

[0036] 1. Heavy hammer; 2. Heavy hammer arm; 3. First hydraulic support mechanism; 301. First cylinder body; 302. First hydraulic rod; 4. Second hydraulic support mechanism; 401. Second cylinder body; 402. Second hydraulic rod; 5. Second hinge; 6. First hinge; 7. Connecting rod mechanism; 8. Positioning steel plate; 9. Hook body; 10. Second stop valve; 11. Second opening valve flow regulating valve; 12. Pressure gauge; 13. Accumulator; 14. Manual closing valve regulating valve; 15. Normally powered solenoid valve; 16. Pressure switch; 17. Oil supply filter; 18. Electric oil pump; 19. First one-way valve; 20. Overflow valve; 21. Second one-way valve; 22. Manual oil pump; 23. Oil tank. DETAILED DESCRIPTION

[0037] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0038] The emergency drain valve for an indirect air cooling system according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0039] like Figure 4-8 As shown, an embodiment of the present invention proposes a control mechanism for an emergency water discharge valve, including: a weight mechanism, a first hydraulic support mechanism 3 and a second hydraulic support mechanism 4, the weight mechanism includes a connected weight 1 and a weight arm 2, one end of the weight arm 2 is connected to the weight 1, and the other end of the weight arm 2 is connected to the emergency water discharge valve through a connecting rod mechanism 7; the first hydraulic support mechanism 3 and / or the second hydraulic support mechanism 4 are connected to and drive the weight mechanism to swing, thereby driving the opening and closing of the emergency water discharge valve, the first hydraulic support mechanism 3 is connected to the end of the weight arm 2 away from the weight 1 through the connecting rod mechanism 7, and the second hydraulic support mechanism 4 is connected to the bottom of the weight arm 2.

[0040] The embodiment of the present invention adds a set of hydraulic support mechanisms to the weight arm 2 on the basis of the original hydraulic support mechanism, and forms a dual force with the original hydraulic support mechanism, thereby ensuring the normal opening and closing of the emergency drain valve and ensuring the safe and reliable operation of the indirect air-cooled circulating water system. Any abnormality in any set of hydraulic support mechanisms will not affect the safety of the system. The safety of the system operation is guaranteed. When the emergency drain valve needs to be activated, the two sets of hydraulic support mechanisms can also be activated at the same time.

[0041] After adopting the double hydraulic support mechanism, no matter which set of hydraulic support mechanism's system solenoid valve is accidentally powered off, the solenoid valve coil is burned, the solenoid valve mechanical failure, hydraulic system leakage and any other unexpected failures, it will not affect the normal operation of the emergency drain valve. When the system issues an emergency drain command, the emergency drain valve can be opened in time to prevent the radiator from being unable to drain water and causing large-scale freezing in unexpected situations.

[0042] The embodiment of the present invention has a simple structure, is easy to improve on the original mechanism, and reduces the cost of transformation and maintenance.

[0043] Furthermore, the emergency drain valve is a butterfly valve.

[0044] In some embodiments, Figure 4 As shown, the first hydraulic support mechanism 3 includes a first cylinder body 301 and a first hydraulic rod 302 connected to each other. The top end of the first hydraulic rod 302 is connected to the weight arm 2 through a connecting rod mechanism 7 and controls the swing of the weight mechanism, thereby driving the opening and closing of the emergency water discharge valve; the second hydraulic support mechanism 4 includes a second cylinder body 401 and a second hydraulic rod 402 connected to each other. The second cylinder body 401 is connected to the ground or platform through a first hinge 6, and the top end of the second hydraulic rod 402 is connected to the weight arm 2 through a second hinge 5. The extension and retraction of the second hydraulic rod 402 drives the weight mechanism to swing, thereby driving the opening and closing of the emergency water discharge valve.

[0045] The hydraulic support mechanism of the embodiment of the present invention adopts a one-way acting hydraulic cylinder, and the hydraulic system of the one-way acting hydraulic cylinder has the advantages of a simple system and reliable operation. It should be noted that as long as the hydraulic system is depressurized, the emergency drain valve will be automatically opened under the action of the heavy hammer 1, and it does not require the linkage of the electromagnetic valve to operate safely and reliably like a two-way acting hydraulic cylinder. When the control signal is abnormal, especially when the control system is completely powered off, the two-way acting hydraulic cylinder will be out of control, which will cause the emergency drain valve to be unable to open, so the newly added hydraulic support mechanism still adopts a one-way acting hydraulic cylinder, and requires the pressure of the hydraulic system pressure test to reach 31.5MPa.

[0046] It should be noted that the lengths of the first hydraulic rod 302 and the second hydraulic rod 402 must be long enough to drive the emergency drain valve to fully open or fully close.

[0047] Furthermore, the second hydraulic rod 402 is extended and retracted in the vertical direction.

[0048] In some embodiments, Figure 4 As shown, the end of the weight arm 2 away from the weight 1 is connected to the emergency drain valve through the weight shaft.

[0049] In some embodiments, Figure 5 As shown, the first hinged member 6 is fixedly connected to the ground or platform via embedded parts.

[0050] Furthermore, the embedded parts include a positioning steel plate 8 and a hook body 9. The positioning steel plate 8 is fixedly connected to the ground or platform, the hook body 9 is buried under the ground or platform, the hook body 9 is fixedly connected to the positioning steel plate 8 by bolts, and the first hinge 6 is fixedly connected to the upper end of the positioning steel plate 8.

[0051] In some embodiments, Figure 8 As shown, the first cylinder body 301 is connected to the oil tank 23 through the first hydraulic pipeline, and the first shut-off valve and the first opening flow regulating valve are connected to the first hydraulic pipeline. The second cylinder body 401 is connected to the oil tank 23 through the second hydraulic pipeline, and the second shut-off valve 10 and the second opening flow regulating valve 11 are connected to the second hydraulic pipeline. The switching valve speeds of the first opening flow regulating valve and the second opening flow regulating valve 11 are consistent.

[0052] By providing the first valve opening flow regulating valve and the second valve opening flow regulating valve 11, the synchronization of the switch valves of the two sets of hydraulic support mechanisms is ensured.

[0053] Furthermore, a manual isolation valve is connected to the second hydraulic pipeline at a position close to the second cylinder body 401 to prevent the hydraulic components of the newly installed second hydraulic support mechanism 4 from leaking and causing the second hydraulic support mechanism 4 to lose its supporting function. When the second hydraulic support mechanism 4 fails or the system is under maintenance, the manual isolation valve can be closed to isolate the system.

[0054] Furthermore, the second hydraulic pipeline is connected with an accumulator 13 and a pressure gauge 12. The pressure gauge 12 is used to monitor the pressure of the second hydraulic pipeline, and the accumulator 13 is used to supplement the pressure.

[0055] Furthermore, an oil supply filter 17 is connected to the second hydraulic pipeline to filter the hydraulic oil in the oil tank 23 before supplying the oil.

[0056] In some embodiments, Figure 8 As shown, the second hydraulic pipeline is connected to the oil tank 23 through an electric hydraulic branch and a manual hydraulic branch respectively. The electric hydraulic branch and the manual hydraulic branch are connected in parallel. The electric hydraulic branch is connected to an electric oil pump 18 and a first one-way valve 19, and the manual hydraulic branch is connected to a manual oil pump 22 and a second one-way valve 21.

[0057] The safety of the oil supply to the hydraulic system of the second hydraulic support mechanism 4 can be ensured. When the electric oil pump 18 fails, or the hydraulic system pressure is lower than the starting set pressure value of the electric oil pump, or the electric oil pump 18 does not work, the staff can start the manual oil pump 22 to supplement the pressure.

[0058] Furthermore, a pressure switch 16 is connected to the second hydraulic pipeline, which can stabilize the pressure maintaining performance of the second hydraulic support mechanism 4 and enable the electric oil pump 18 to start and stop automatically. When the oil pressure of the hydraulic system is set to 8.0MPa, the electric oil pump 18 starts to replenish the pressure. When the oil pressure of the hydraulic system reaches 15.0MPa, the electric oil pump 18 stops running.

[0059] In some embodiments, Figure 8 As shown, a pressure relief branch is connected between the second hydraulic pipeline and the oil tank 23, and a manual valve closing regulating valve 14 and a normally electric solenoid valve 15 are connected to the pressure relief branch. The manual valve closing regulating valve 14 is arranged at the upstream position of the normally electric solenoid valve 15 and is close to the normally electric solenoid valve 15. When the normally electric solenoid valve is energized, the normally electric solenoid valve is in a disconnected state. When the normally electric solenoid valve loses power, the normally electric solenoid valve is in a connected state. The first hydraulic pipeline and the second hydraulic pipeline have the same configuration, and the normally electric solenoid valve of the first hydraulic pipeline is linked with the normally electric solenoid valve 15 of the second hydraulic pipeline.

[0060] The manual closing valve regulating valve 14 can adjust the pressure relief flow and also has an isolation function. When the normally-powered solenoid valve 15 fails, the manual closing valve regulating valve 14 can be completely closed to ensure that the normally-powered solenoid valve 15 can be replaced and repaired without depressurizing the hydraulic support mechanism.

[0061] When the system needs to open the emergency drain valve in an emergency, the solenoid valves of the two hydraulic control systems can simultaneously release pressure and open the emergency drain valve. When the system issues an instruction to close the emergency drain valve, the solenoid valves of the two hydraulic control systems can simultaneously close and start the electric oil pump 18 to maintain the pressure to the set pressure value.

[0062] Furthermore, the second hydraulic pipeline is connected to an overflow bypass, and an overflow valve 20 is connected to the overflow bypass. The overflow bypass, the electric hydraulic branch and the manual hydraulic branch are connected in parallel. By setting the overflow bypass, it is possible to prevent the system oil pressure from reaching the high pressure setting value due to a failure of the pressure switch 16, but the electric oil pump 18 cannot be shut down as required, resulting in the problem of system overpressure. When the set pressure of the overflow valve 20 is reached, the overflow automatically acts to release the pressure. And in order to ensure the stability of the system pressure, the overflow valve 20 adopts a pilot overflow valve 20.

[0063] In some embodiments, the second hydraulic support mechanism 4 is controlled by an independent power supply and connected to an independent UPS power supply, and the power supplies of the second hydraulic support mechanism 4 and the first hydraulic support mechanism 3 are in different safety sections, which can ensure the safety of the emergency drain valve.

[0064] A second embodiment of the present invention provides an emergency drain valve, comprising the above-mentioned control mechanism.

[0065] The third aspect of the present invention provides an application of the above-mentioned emergency drain valve in an indirect air cooling system.

[0066] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0067] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0068] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0069] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0070] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0071] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A control mechanism for an emergency drain valve, characterized in that: include: A weight mechanism, the weight mechanism comprising a connected weight and a weight arm, one end of the weight arm is connected to the weight, and the other end of the weight arm is connected to an emergency drain valve through a connecting rod mechanism; The first hydraulic support mechanism and the second hydraulic support mechanism, the first hydraulic support mechanism and / or the second hydraulic support mechanism are connected and drive the weight mechanism to swing, thereby driving the opening and closing of the emergency drain valve, the first hydraulic support mechanism is connected to the end of the weight arm away from the weight through the connecting rod mechanism, and the second hydraulic support mechanism is connected to the bottom of the weight arm.

2. The control mechanism of the emergency drain valve according to claim 1, characterized in that: The first hydraulic support mechanism includes a first cylinder body and a first hydraulic rod connected to each other, the top end of the first hydraulic rod is connected to the weight arm through the connecting rod mechanism and controls the weight mechanism to swing, thereby driving the opening and closing of the emergency drain valve; The second hydraulic support mechanism includes a second cylinder body and a second hydraulic rod connected to each other. The second cylinder body is connected to the ground or platform through a first hinge. The top end of the second hydraulic rod is connected to the weight arm through a second hinge. The extension and retraction of the second hydraulic rod drives the weight mechanism to swing, thereby driving the opening and closing of the emergency drain valve.

3. The control mechanism of the emergency drain valve according to claim 1, characterized in that: The end of the weight arm away from the weight is connected to an emergency drain valve via a weight shaft.

4. The control mechanism of the emergency drain valve according to claim 2, characterized in that: The first hinged member is fixedly connected to the ground or platform via an embedded member.

5. The control mechanism of the emergency drain valve according to claim 2, characterized in that: The first cylinder body is connected to the oil tank through a first hydraulic pipeline, and a first shut-off valve and a first opening flow regulating valve are connected to the first hydraulic pipeline. The second cylinder body is connected to the oil tank through a second hydraulic pipeline, and a second shut-off valve and a second opening flow regulating valve are connected to the second hydraulic pipeline. The switching valve speeds of the first opening flow regulating valve and the second opening flow regulating valve are consistent.

6. The control mechanism of the emergency drain valve according to claim 5, characterized in that: The second hydraulic pipeline is connected to the oil tank through an electric hydraulic branch and a manual hydraulic branch respectively. The electric hydraulic branch and the manual hydraulic branch are connected in parallel. The electric hydraulic branch is connected with an electric oil pump and a first one-way valve, and the manual hydraulic branch is connected with a manual oil pump and a second one-way valve.

7. The control mechanism of the emergency drain valve according to claim 5, characterized in that: A pressure relief branch is connected between the second hydraulic pipeline and the oil tank, and a manual valve closing regulating valve and a normally electric solenoid valve are connected to the pressure relief branch. The manual valve closing regulating valve is arranged at an upstream position of the normally electric solenoid valve and close to the normally electric solenoid valve. When the normally electric solenoid valve is energized, the normally electric solenoid valve is in a disconnected state, and when the normally electric solenoid valve is de-energized, the normally electric solenoid valve is in a connected state. The first hydraulic pipeline and the second hydraulic pipeline have the same configuration, and the normally electric solenoid valve of the first hydraulic pipeline is linked with the normally electric solenoid valve of the second hydraulic pipeline.

8. The control mechanism of the emergency drain valve according to claim 1, characterized in that: The second hydraulic support mechanism is controlled by an independent power supply and is connected to an independent UPS power supply. The power supplies of the second hydraulic support mechanism and the first hydraulic support mechanism are in different safety sections.

9. An emergency drain valve, characterized in that: Comprising the control mechanism described in any one of claims 1-8.

10. Use of the emergency drain valve according to claim 9 in an indirect air cooling system.

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