A preheating unit for nuclear power emergency diesel generator set and a using method thereof

Abstract

The application relates to the technical field of nuclear power, and particularly discloses a preheating unit for a nuclear power emergency diesel generator set and a use method, which comprises a unit mechanism, a connecting mechanism and a docking mechanism. The connecting mechanism is arranged at the top right side of the unit mechanism; and the docking mechanism is arranged at the right rear side of the inner side of the unit mechanism. The preheating unit for the nuclear power emergency diesel generator set integrates the equipment required for preheating the unit on a whole frame and is directly installed, so that the work required on the site is greatly reduced without affecting the operation performance of the unit, the construction period is effectively shortened, the installation difficulty is reduced, the adjustment of the connection mode with external equipment is more flexible, and the design, arrangement and construction difficulty of the nuclear power emergency diesel generator set workshop and the difficulty of subsequent equipment upgrading and maintenance are effectively reduced.

Description

Technical Field

[0001] This invention relates to the field of nuclear power technology, specifically to a preheating unit and its usage method for nuclear power emergency diesel generator sets. Background Technology

[0002] Nuclear power, or nuclear energy generation, is a method of generating electricity using the heat released from the fission reaction of nuclear fuel in a nuclear reactor. Under normal circumstances, the main power supply system in a nuclear power plant powers various critical equipment, such as pumps and control systems in the cooling system. However, when the main power supply system loses power due to reasons such as earthquakes or external power grid failures, emergency diesel generator sets become crucial emergency power sources. As the only emergency power source after the nuclear power plant loses its main operating power, the emergency diesel generator sets are of paramount importance. Their function is to provide medium-voltage emergency AC power to the nuclear power plant when the external AC power system fails, ensuring the safe shutdown of the reactor and preventing accidents. To ensure the units have the ability to start immediately in the event of an unexpected power outage, cooling water of a suitable temperature range needs to circulate within the diesel engine to ensure that the diesel engine has reasonable heat dissipation and lubrication performance during startup.

[0003] In the existing technical field, the design of traditional unit auxiliary systems requires the placement of water pumps, heaters, and sensors within the unit building, and the connection of these devices via flexible and rigid connections. This results in extensive preparation work, long installation time, and a large footprint during on-site installation. Furthermore, due to the fixed planned locations of equipment within the existing unit building, the installation of the unit auxiliary system requires consideration of the positional relationships of the docking joints, leading to fixed installation locations for the existing unit auxiliary systems. This affects subsequent maintenance and repair, and causes inconvenience when replacing or upgrading equipment. Summary of the Invention

[0004] The purpose of this invention is to provide a preheating unit and its usage method for nuclear power emergency diesel generator sets, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a preheating unit for a nuclear power emergency diesel generator set, comprising: a generator set structure, a connecting mechanism, and a docking mechanism; the connecting mechanism is located on the top right side of the generator set structure; the docking mechanism is located on the inner right rear side of the generator set structure.

[0006] Preferably, the unit structure includes: a frame, an electric heater, a water pump, an inlet pipe, a first ball valve, an inlet pipe, a first connecting pipe, a check valve, a second ball valve, a second connecting pipe, an outlet pipe, and mounting components; the frame is arranged along the front-rear direction; the electric heater is fixedly installed inside the inner side of the frame; there are two water pumps, which are respectively fixedly installed on the front and rear sides of the top of the frame; there are two inlet pipes, one end of which is connected to the inlet of the two water pumps; there are two first ball valves, which are respectively connected to the other end of the two inlet pipes; the inlet pipe is installed on the middle right side of the top of the frame via a bracket, and the two inlets of the inlet pipe are respectively connected to the other ends of the two inlet pipes; the first connecting pipe... The system comprises two connecting pipes, one end of which is connected to the outside of the outlet of each of the two water pumps; two check valves, one end of which is connected to the other end of each of the two first connecting pipes; two second ball valves, the inlets of which are connected to the other ends of each of the two check valves; a second connecting pipe is mounted on the inside of the frame via a bracket, with its two inlets connected to the outlets of the two second ball valves, and the outlet of the frame connected to the inlet of the electric heater; an outlet pipe is mounted on the top right side of the inside of the frame via a bracket, and is connected to the outlet of the electric heater; and four mounting components are spaced apart at the bottom of the frame.

[0007] Preferably, the mounting components include: a pre-embedded plate, a mounting plate, and bolts; the pre-embedded plate is disposed below the frame in the front-back direction and pre-embedded in the ground; the mounting plate is fixedly installed at the top center of the pre-embedded plate in the front-back direction; the number of bolts is four, and the four bolts are respectively screwed into the four corners of the mounting plate, and the top of the bolts is connected to the internal screw holes of the frame.

[0008] Preferably, the connecting mechanism includes: a first locking seat, a triangular frame, a first transmission locking device, a first rotating handle, a first pulley, a track frame, a second pulley, a through hole, and a first belt; the number of first locking seats is two, and the two first locking seats are respectively installed at the front and rear ends of the top right side of the frame; the triangular frame is fixedly installed on the top of the front and rear first locking seats; the number of first transmission locking devices is three, and the three first transmission locking devices are respectively fixedly installed at the left triangular position of the triangular frame; the number of first rotating handles is three, and the three first rotating handles are respectively screwed to the input ends of the three first transmission locking devices; the number of first pulleys is... Three first pulleys are respectively installed on the rotating ends of three first transmission lockers; three track frames are respectively fixedly installed in the right triangular position of the triangular frame in the left-right direction; three second pulleys are respectively installed on the inner right end of the three track frames through rotating shaft seats; three through holes are respectively opened in the triangular position of the triangular frame; three first belts are respectively sleeved on the outside of the three first pulleys and second pulleys in the left-right direction, and the inner side of the three first belts is respectively connected to the outer side of the three first sliders.

[0009] Preferably, the connecting mechanism further includes: a first slider, a connecting rod, a mounting base, a first connector tube, and a connecting hose; the number of first sliders is three, and the three first sliders are respectively sleeved on the outside of the three track frames; the number of connecting rods is three sets, with three connecting rods in each set, and one end of each of the three sets of connecting rods is rotatably connected to the outer sides of the three first sliders via pins; the mounting base is rotatably connected to the inner side of the other end of the three sets of connecting rods via pins; the first connector tube is disposed on the inner side of the mounting base; one end of the connecting hose is connected to the first connector tube, and the other end of the connecting hose is connected to the inlet pipe.

[0010] Preferably, the docking mechanism includes: a second locking seat, a U-shaped frame, a first slide rail, a second transmission locking device, a second rotating handle, a second slider, a lead screw, and a lead screw nut; the second locking seat is installed on the inner right rear side of the frame; the U-shaped frame is fixedly installed on the front side of the second locking seat; there are two first slide rails, which are fixedly installed at the front and rear ends of the right side of the U-shaped frame in the vertical direction; there are two second transmission locking devices, which are installed at the input ends of the two second transmission locking devices; there are two second rotating handles, which are installed at the rotating ends of the two first transmission locking devices; there are two second sliders, which are respectively sleeved on the outside of the front and rear first slide rails; the lead screw is installed at the rotating end of the rear second transmission locking device in the vertical direction; the lead screw nut is rotatably connected to the right side of the rear second slider through a bearing, and the inner side of the lead screw nut is screwed to the outer side of the lead screw.

[0011] Preferably, the docking mechanism further includes: a third pulley, a second slide rail, a slider seat, a second connector tube, a telescopic connecting tube, a keyway cylinder, a first bevel gear, a fourth pulley, a second bevel gear, a second belt, and a key shaft; the third pulley is rotatably mounted in the inner cavity of the rear second slider via a bearing; the second slide rail is fixedly mounted in the front-rear direction on the inner bottom ends of the front and rear second sliders; the slider seat is sleeved on the outside of the second slide rail; the second connector tube is installed on the inner bottom of the slider seat; one end of the telescopic connecting tube is connected to the left side of the second connector tube, and the other end of the telescopic connecting tube is connected to the outlet pipe; the keyway cylinder is rotatably connected to the top right rear of the front second slider via a bearing; the third pulley is rotatably mounted in the inner cavity of the rear second slider via a bearing. A bevel gear is fixedly connected to the bottom outer side of the keyway cylinder; a fourth pulley is rotatably mounted in the inner cavity of the second slider on the front side via a bearing, and the right end of the shaft of the fourth pulley extends out of the outside of the second slider; a second bevel gear is fixedly connected to the right end of the shaft of the fourth pulley, and the second bevel gear meshes with the first bevel gear; a second belt passes through the inner openings of the two second sliders in the front-rear direction, and the front and rear ends of the inner side of the second belt are sleeved on the outside of the fourth pulley and the third pulley, and the bottom of the second belt is connected to the top of the slider seat; a key shaft is inserted into the inner side of the keyway cylinder in the up-down direction, and the top of the key shaft is connected to the bottom of the rotating end of the second transmission lock on the front side.

[0012] Preferably, rotating the first handle on three sides drives the first pulley at the corresponding position to rotate clockwise or counterclockwise under the transmission of the first transmission lock. The first belt at the corresponding position on the three sides rotates under the tensioning and limiting action of the second pulley, so that the first belt drives the first slider at the corresponding position to move along the outside of the track frame.

[0013] Preferably, rotating the second handle on the front side drives the key shaft to rotate under the transmission of the second transmission lock, causing the key shaft to rotate inside the keyway cylinder. At the same time, the keyway cylinder drives the first bevel gear to rotate, and the second bevel gear drives the fourth pulley to rotate under the rotational force of the first bevel gear. The second belt drives the slider seat to move in the front and back direction under the drive of the fourth pulley and the tensioning and limiting action of the third pulley.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. By rotating the first handle on three sides, the first handle drives the first pulley at the corresponding position to rotate clockwise or counterclockwise under the transmission of the first transmission locking device. The first belt at the corresponding position on the three sides rotates clockwise or counterclockwise under the tensioning and limiting action of the second pulley, so that the first belt drives the first slider at the corresponding position to move to the left or right along the outside of the track frame. The connecting rod rotates upward or downward around the pivot point on the outside of the first slider. Then, with the cooperation of the three connecting rods, the mounting seat drives the first connector pipe to move to the designated position or designated angle. After the mounting seat moves to the designated position, the first connector pipe is connected to the external coolant supply system connector to adjust the layout to match the original external coolant supply system inside the factory.

[0016] 2. By rotating the second handle on the rear side and driving the lead screw to rotate under the transmission of the second transmission locking device, the lead screw nut drives the second slider on the rear side to move up and down outside the first slide rail rod on the rear side under the action of the lead screw. With the cooperation of the second slide rail rod, the second slider on the front side is driven to move up and down outside the first slide rail rod on the front side. The second slide rail rod drives the slider seat to move the second connector tube up and down to the specified height position. By rotating the second handle on the front side and driving the key shaft to rotate under the transmission of the second transmission locking device, the key shaft drives the keyway cylinder to rotate the first bevel gear. The second bevel gear drives the fourth pulley to rotate under the action of the rotational force of the first bevel gear. The second belt drives the slider seat to move back and forth under the drive of the fourth pulley and the tensioning and limiting action of the third pulley. The slider seat drives the second connector tube to move back and forth to the specified position along the outside of the second slide rail rod, and connects the second connector tube with the external coolant supply system connector to adapt to the original layout of the diesel generator set inside the plant.

[0017] 3. The coolant is supplied through the external coolant supply system via the first connector pipe and connecting hose to the inlet pipe. The operator closes the first and second ball valves at the corresponding positions as needed, so that the water pumps on both sides are used in a one-in-one standby mode. This ensures that the other water pump does not interrupt the preheating operation of the unit when one water pump fails or is under maintenance. The coolant inside the inlet pipe enters the water pump through the first ball valve and inlet pipe on the other side. The water pump delivers the internal coolant to the electric heater through the first connecting pipe, check valve, second ball valve, and second connecting pipe. The electric heater heats the internal coolant to achieve coolant preheating, and the preheated coolant enters the external diesel generator set through the outlet pipe, telescopic connecting pipe, and second connector pipe.

[0018] In summary, this invention integrates the equipment required for unit preheating into a single frame for direct installation. Without affecting the unit's operating performance, it greatly reduces the on-site work required, effectively shortens the construction period and installation difficulty, and allows for more flexible adjustments to the connection methods with external equipment. This effectively reduces the design, layout, and construction difficulty of nuclear power emergency diesel generator set plant. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention;

[0020] Figure 2 for Figure 1 A schematic diagram of the unit's structure;

[0021] Figure 3 for Figure 2 Right view of the mounting components;

[0022] Figure 4 for Figure 1 Exploded view of the connection mechanism;

[0023] Figure 5 for Figure 4 Enlarged view of point A;

[0024] Figure 6 for Figure 1 Exploded view of the docking mechanism;

[0025] Figure 7 for Figure 6 Enlarged view of point B.

[0026] In the diagram: 1. Unit structure; 11. Frame; 12. Electric heater; 13. Water pump; 14. Inlet pipe; 15. First ball valve; 16. Inlet pipe; 17. First connecting pipe; 18. Check valve; 19. Second ball valve; 110. Second connecting pipe; 111. Outlet pipe; 2. Connecting mechanism; 21. First locking seat; 22. Triangular frame; 23. First transmission locking device; 24. First handle; 25. First pulley; 26. Track frame; 27. Second pulley; 28. Through hole; 29. ​​First belt; 210. First slider; 211. Connecting rod; 212. Mounting base; 213. First connector pipe; 21 4. Connecting hose; 3. Docking mechanism; 31. Second locking seat; 32. U-shaped frame; 33. First slide rail rod; 34. Second transmission locking device; 35. Second rotating handle; 36. Second slider; 37. Lead screw; 38. Lead screw nut; 39. Third pulley; 310. Second slide rail rod; 311. Slider seat; 312. Second connector tube; 313. Telescopic connecting tube; 314. Keyway cylinder; 315. First bevel gear; 316. Fourth pulley; 317. Second bevel gear; 318. Second belt; 319. Key shaft; 4. Mounting components; 41. Embedded plate; 42. Mounting plate; 43. Bolt. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Please see Figures 1-7 The present invention provides a technical solution: a preheating unit for a nuclear power emergency diesel generator set, comprising: a generator set 1, a connecting mechanism 2 and a docking mechanism 3; the connecting mechanism 2 is located on the top right side of the generator set 1; the docking mechanism 3 is located on the inner right rear side of the generator set 1.

[0029] As a preferred embodiment, the unit structure 1 further includes: a frame 11, an electric heater 12, a water pump 13, an inlet pipe 14, a first ball valve 15, an inlet pipe 16, a first connecting pipe 17, a check valve 18, a second ball valve 19, a second connecting pipe 110, an outlet pipe 111, and mounting components 4; the frame 11 is arranged along the front-to-back direction, and a lifting lug is provided on the top of the frame 11 to facilitate the overall transportation of the unit; the electric heater 12 is fixedly installed inside the frame 11; there are two water pumps 13, each of which is... The pumps 13 are fixedly installed on the front and rear sides of the top of the frame 11. One pump is in operation and the other is on standby, ensuring that the preheating operation of the unit is not interrupted when one pump 13 fails or is under maintenance. There are two inlet pipes 14, one end of which is connected to the inlet of each of the two pumps 13. There are also two first ball valves 15, each connected to the other end of one of the two inlet pipes 14. The inlet pipe 16 is installed on the top right side of the frame 11 via a bracket, with inlets at both ends of the inlet pipe 16. Do not connect to the other end of the two inlet pipes 14; there are two first connecting pipes 17, one end of each first connecting pipe 17 is connected to the outside of the outlet of the two water pumps 13; there are two check valves 18, one end of each check valve 18 is connected to the other end of the two first connecting pipes 17, the check valves 18 can prevent coolant from flowing back from the outlet of the standby water pump 13 when the unit mechanism 1 is running, avoiding a reduction in the pumped coolant flow and damage to the water pump 13 due to reverse rotation; there are two second ball valves 19, the two second ball valves The inlet of 19 is connected to the other end of the two check valves 18 respectively; the second connecting pipe 110 is installed on the inner side of the frame 11 through the bracket, and the two inlets of the second connecting pipe 110 are connected to the outlets of the two second ball valves 19 respectively. The outlet of the frame 11 is connected to the inlet of the electric heater 12; the outlet pipe 111 is installed on the right side of the top inner side of the frame 11 through the bracket, and the outlet pipe 111 is connected to the outlet of the electric heater 12; there are four mounting components 4, which are installed at intervals at the bottom of the frame 11.

[0030] As a preferred embodiment, the mounting component 4 further includes: a pre-embedded plate 41, a mounting plate 42, and bolts 43; the pre-embedded plate 41 is positioned below the frame 11 in the front-back direction and pre-embedded in the ground; the mounting plate 42 is fixedly installed at the top center of the pre-embedded plate 41 in the front-back direction; there are four bolts 43, which are screwed into the four corners of the mounting plate 42 respectively, and the top of the bolts 43 is connected to the internal screw holes of the frame 11.

[0031] As a preferred option, further, such as Figure 4 and Figure 5As shown, the connecting mechanism 2 includes: a first locking seat 21, a triangular frame 22, a first transmission locking device 23, a first rotating handle 24, a first pulley 25, a track frame 26, a second pulley 27, a through hole 28, a first belt 29, a first slider 210, a connecting rod 211, a mounting base 212, a first connector tube 213, and a connecting hose 214; there are two first locking seats 21, which are respectively installed at the front and rear ends of the top right side of the frame 11. Each first locking seat 21 has a locking mechanism inside, allowing it to be detachably installed on the top of the frame 11; the triangular frame 22 is fixedly installed on the top of the two first locking seats 21; there are three first transmission locking devices 23, each with a first locking mechanism inside. A transmission locking device 23 is fixedly installed on the left triangular position of the triangular frame 22. The first locking seat 21 has a locking mechanism inside, which serves to transmit power between the first rotating handle 24 and the first pulley 25 while simultaneously locking the first rotating handle 24. There are three first rotating handles 24, each screwed to the input end of one of the three first transmission locking devices 23. There are three first pulleys 25, each installed on the rotating end of one of the three first transmission locking devices 23. There are three track frames 26, each fixedly installed on the right triangular position of the triangular frame 22 along the left-right direction. There are three second pulleys 27, each mounted on the three... On the inner right end of the track frame 26, the second pulley 27 serves to tension and limit the first belt 29; there are three through holes 28, which are respectively opened at the triangular positions of the triangular frame 22; there are three first belts 29, which are respectively sleeved on the outside of the three first pulleys 25 and the second pulley 27 in the left and right directions, and the inner sides of the three first belts 29 are respectively connected to the outer sides of the three first sliders 210. The first belts 29 rotate clockwise or counterclockwise under the drive of the first pulleys 25 to drive the first sliders 210 to move to the left or right; there are three first sliders 210, which are respectively sleeved on the outside of the three track frames 26. It can move horizontally in the left and right directions outside the track frame 26; there are three sets of connecting rods 211, with three connecting rods 211 in each set. One end of each of the three sets of connecting rods 211 is rotatably connected to the outer sides of the three first sliders 210 by a pin. The connecting rods 211 can rotate upward or downward about the point where they are rotatably connected to the outer pin of the first slider 210; the mounting base 212 is rotatably connected to the inner side of the other end of the three sets of connecting rods 211 by a pin; the first connector tube 213 is located inside the mounting base 212; one end of the connecting hose 214 is connected to the first connector tube 213, and the other end of the connecting hose 214 is connected to the inlet tube 16. The connecting hose 214 itself has an elastic telescopic function and can move with the first connector tube 213.

[0032] As a preferred option, further, such as Figure 5 and Figure 6As shown, the docking mechanism 3 includes: a second locking seat 31, a U-shaped frame 32, a first slide rail rod 33, a second transmission locking device 34, a second rotating handle 35, a second slider 36, a lead screw 37, a lead screw nut 38, a third pulley 39, a second slide rail rod 310, a slider seat 311, a second connector tube 312, a telescopic connecting tube 313, a keyway cylinder 314, a first bevel gear 315, a fourth pulley 316, a second bevel gear 317, a second belt 318, and a key shaft 319; the second locking seat 31 is installed on the inner right rear side of the frame 11, and a locking mechanism is provided inside the second locking seat 31, allowing the second locking seat 31 to be detachably installed on the inner side of the frame 11; the U-shaped frame 32 is fixedly installed on the second locking seat 31. The front side; there are two first slide rail rods 33, which are fixedly installed at the front and rear ends of the right side of the U-shaped frame 32 in the vertical direction; there are two second transmission locking devices 34, which are installed at the input ends of the two second transmission locking devices 34 respectively. The second transmission locking device 34 is provided with a locking mechanism inside, which can lock and fix the second rotating handle 35 while playing the role of transmission between the second rotating handle 35 and the lead screw 37 and between the lead screw 37; there are two second rotating handles 35, which are installed at the rotating ends of the two first transmission locking devices 23 respectively; there are two second sliders 36, which are respectively sleeved on the front and rear first slide rail rods 33. Externally, the second slider 36 can move up and down outside the first slide rail 33; the lead screw 37 is installed in the vertical direction at the rotating end of the rear second transmission locking device 34; the lead screw nut 38 is rotatably connected to the right side of the rear second slider 36 through a bearing, the inner side of the lead screw nut 38 is screwed to the outer side of the lead screw 37, and the lead screw nut 38 can move up and down under the action of the rotational force of the lead screw 37; the third pulley 39 is rotatably installed in the inner cavity of the rear second slider 36 through a bearing; the second slide rail 310 is fixedly installed in the front and rear directions at the inner bottom ends of the two second sliders 36; the slider seat 311 is sleeved on the outside of the second slide rail 310, and the slider seat 311 can move horizontally in the front and rear directions outside the second slide rail 310; the second connection The head tube 312 is installed on the inner bottom of the slider seat 311; one end of the telescopic connecting tube 313 is connected to the left side of the second connector tube 312, and the other end of the telescopic connecting tube 313 is connected to the outlet tube 111. The telescopic connecting tube 313 itself has a telescopic function and can move with the second connector tube 312; the keyway cylinder 314 is rotatably connected to the top right rear of the front second slider 36 through a bearing; the first bevel gear 315 is fixedly connected to the outer bottom of the keyway cylinder 314, and can drive the keyway cylinder 314 to move up and down outside the key shaft 319 during the up and down movement of the front second slider 36; the fourth pulley 316 is rotatably installed in the inner cavity of the front second slider 36 through a bearing, and the right end of the shaft of the fourth pulley 316 extends out of the outside of the second slider 36;The second bevel gear 317 is fixedly connected to the right end of the shaft of the fourth pulley 316. The second bevel gear 317 meshes with the first bevel gear 315, and the second bevel gear 317 can drive the fourth pulley 316 to rotate under the rotational force of the first bevel gear 315. The second belt 318 passes through the inner openings of the two second sliders 36 in the front-rear direction. The front and rear ends of the inner side of the second belt 318 are sleeved on the outside of the fourth pulley 316 and the third pulley 39. The bottom of the second belt 318 is connected to the top of the slider seat 311. The key shaft 319 is inserted into the inner side of the keyway cylinder 314 in the vertical direction. The top of the key shaft 319 is connected to the bottom of the rotating end of the front second transmission lock 34.

[0033] The working principle is as follows:

[0034] Step 1: Workers pre-embed embedded plates 41 in the factory floor according to the planned locations. During installation, mounting plates 42 are welded to the top of the embedded plates 41. The unit mechanism 1 uses bolts 43 to fix the frame 11 to the surface of the mounting plate 42 through the pre-drilled holes on the frame 11. Workers rotate the first handles 24 on three sides according to the location of the external coolant supply system connector. Under the transmission of the first transmission locking device 23, the first handles 24 drive the first pulleys 25 at the corresponding positions to rotate clockwise or counterclockwise. The first belts 29 at the corresponding positions on the three sides rotate clockwise or counterclockwise under the tensioning and limiting action of the second pulleys 27, so that the first belts 29 drive... The first slider 210 at the corresponding position moves to the left or right along the outside of the track frame 26. At the same time, the first slider 210 drives one end of the connecting rod 211 to move horizontally to the left or right. The connecting rod 211 rotates upward or downward around the pivot point on the outside of the first slider 210. Then, with the cooperation of the three connecting rods 211, the mounting base 212 drives the first connector tube 213 to move to the designated position or angle. After the mounting base 212 moves to the designated position, the operator locks the first transmission locking device 23 to connect the first connector tube 213 with the external coolant supply system connector to adapt to the layout of the original external coolant supply system inside the factory.

[0035] Step 2: Based on the location of the coolant connector pipe inside the external diesel generator set, the operator rotates the second handle 35 on both the front and rear sides. Rotating the rear second handle 35, driven by the second transmission locking device 34, drives the lead screw 37 to rotate. The lead screw nut 38 moves upward or downward under the rotational force of the lead screw 37, driving the rear second slider 36 to move up and down outside the rear first slide rail 33. With the cooperation of the second slide rail 310, the front second slider 36 moves up and down outside the front first slide rail 33, causing the keyway cylinder 314 to move up and down outside the key shaft 319 while maintaining connection. The second slide rail 310 drives the slider seat 311, moving the second connector pipe 312 up and down to the designated height. The operator then rotates the front second handle 35, which, under the second transmission locking device 34... Driven by the transmission of the moving locking device 34, the key shaft 319 is rotated, causing the key shaft 319 to rotate inside the keyway cylinder 314. At the same time, the keyway cylinder 314 drives the first bevel gear 315 to rotate. Under the rotational force of the first bevel gear 315, the second bevel gear 317 drives the fourth pulley 316 to rotate. Under the drive of the fourth pulley 316 and the tensioning and limiting action of the third pulley 39, the second belt 318 drives the slider seat 311 to move back and forth. The slider seat 311 drives the second connector tube 312 to move back and forth to the designated position along the outside of the second slide rail rod 310. After the second connector tube 312 moves to the designated position, the operator locks the second transmission locking device 34 to fix it, and connects the second connector tube 312 to the external coolant supply system connector to adapt to the original layout of the diesel generator set inside the plant.

[0036] Step 3: The external coolant supply system enters the inlet pipe 16 through the first connector pipe 213 and connecting hose 214. The operator closes the first ball valve 15 and the second ball valve 19 at the corresponding positions as needed, so that the water pumps 13 on both sides are used in a one-on-one standby mode, ensuring that the other water pump 13 does not interrupt the preheating operation of the unit when one water pump 13 fails or is under maintenance. The coolant inside the inlet pipe 16 enters the water pump 13 through the first ball valve 15 and the water inlet pipe 14 on the other side. The water pump 13 delivers the internal coolant to the electric heater 12 through the first connecting pipe 17, check valve 18, second ball valve 19 and second connecting pipe 110. When the unit mechanism 1 is running, the check valve 18 prevents the coolant from flowing back from the outlet of the standby water pump 13. The electric heater 12 heats the internal coolant to achieve coolant preheating, and the preheated coolant enters the external diesel generator set through the outlet pipe 111, telescopic connecting pipe 313 and second connector pipe 312.

[0037] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A preheating unit for a nuclear power emergency diesel generator set, characterized in that, include: Unit structure (1); The connecting mechanism (2) is located on the top right side of the unit mechanism (1); The docking mechanism (3) is located on the inner right rear side of the unit mechanism (1); The unit structure (1) includes: A frame (11) is provided along the front-back direction; An electric heater (12) is fixedly installed inside the inner side of the frame (11); Two water pumps (13) are fixedly installed on the front and rear sides of the top of the frame (11). Water inlet pipe (14), there are two water inlet pipes (14), one end of each of the two water inlet pipes (14) is connected to the water inlet of two water pumps (13); The first ball valve (15) has two components, and the two first ball valves (15) are respectively connected to the other end of the two water inlet pipes (14); The inlet pipe (16) is installed at the middle right side of the top of the frame (11) by means of a bracket, and the two inlets of the inlet pipe (16) are respectively connected to the other ends of the two inlet pipes (14); The first connecting pipe (17) has two parts, and one end of each of the two first connecting pipes (17) is connected to the outside of the outlet of the two water pumps (13); Check valve (18), there are two check valves (18), one end of each check valve (18) is connected to the other end of the two first connecting pipes (17); The second ball valve (19) has two in number, and the inlets of the two second ball valves (19) are respectively connected to the other ends of the two check valves (18); The second connecting pipe (110) is installed on the inner side of the frame (11) by a bracket. The two inlets of the second connecting pipe (110) are respectively connected to the outlets of the two second ball valves (19). The outlet of the frame (11) is connected to the inlet of the electric heater (12). The outlet pipe (111) is installed on the right side of the inner top of the frame (11) by a bracket, and the outlet pipe (111) is connected to the outlet of the electric heater (12). Mounting components (4), the number of which is four, and the four mounting components (4) are installed at intervals at the bottom of the frame (11); The connecting mechanism (2) includes: The first locking bracket (21) has two parts, and the two first locking brackets (21) are respectively installed at the front and rear ends of the top right side of the frame (11); The triangular frame (22) is fixedly installed on the top of the two front and rear first locking brackets (21); The first transmission locking device (23) has three parts, and the three first transmission locking devices (23) are respectively fixedly installed on the left triangular position of the triangular frame (22); The first rotating handle (24) has three parts, and the three first rotating handles (24) are respectively screwed to the input end of the three first transmission locks (23); The first pulley (25) has three pulleys (25), and the three pulleys (25) are respectively installed on the rotating ends of the three first transmission locks (23); The number of track frames (26) is three, and the three track frames (26) are fixedly installed on the right triangular position of the triangular frame (22) in the left and right directions respectively; The number of second pulleys (27) is three, and the three second pulleys (27) are respectively installed on the inner right end of the three track frames (26) through the rotating shaft seat; Three through holes (28) are provided, and the three through holes (28) are respectively provided at the triangular positions of the triangular frame (22); The first belt (29) has three belts (29). The three belts (29) are respectively sleeved on the outside of the three first pulleys (25) and the second pulley (27) in the left and right directions. The inner side of the three belts (29) is connected to the outer side of the three first sliders (210). The first slider (210) has three parts, and the three first sliders (210) are respectively sleeved on the outside of the three track frames (26); The number of connecting rods (211) is three sets, and the number of connecting rods (211) in each set is two. One end of each of the three sets of connecting rods (211) is rotatably connected to the outer sides of the three first sliders (210) by a pin. The mounting base (212) is rotatably connected to the inner side of the other end of the three sets of connecting rods (211) via a pin; The first connector tube (213) is disposed on the inner side of the mounting base (212); A connecting hose (214) is connected at one end to the first connector pipe (213) and at the other end to the inlet pipe (16).

2. The preheating unit for a nuclear power emergency diesel generator set according to claim 1, characterized in that, The mounting component (4) includes: An embedded plate (41) is set below the frame (11) in the front-back direction and embedded in the ground; Mounting plate (42) is fixedly installed at the top center of the pre-embedded plate (41) in the front-back direction; Bolts (43), the number of bolts (43) is four, the four bolts (43) are respectively screwed into the four corners of the mounting plate (42), and the top of the bolts (43) is connected to the internal screw holes of the frame (11).

3. A preheating unit for a nuclear power emergency diesel generator set according to claim 2, characterized in that, The docking mechanism (3) includes: The second locking seat (31) is installed on the inner right rear side of the frame (11); The U-shaped frame (32) is fixedly installed on the front side of the second locking seat (31); The first slide rail (33) has two sections, and the two sections are fixedly installed at the front and rear ends of the right side of the U-shaped frame (32) in the vertical direction. The second transmission locking device (34) has two components; The number of the second rotating handle (35) is two, and the two second rotating handles (35) are respectively installed on the rotating ends of the two second transmission locks (34); The second slider (36) has two parts, and the two second sliders (36) are respectively sleeved on the outside of the front and rear first slide rails (33); The lead screw (37) is installed in the vertical direction at the rotating end of the second transmission lock (34) on the rear side; The lead screw nut (38) is rotatably connected to the right side of the second slider (36) on the rear side via a bearing, and the inner side of the lead screw nut (38) is screwed to the outer side of the lead screw (37).

4. A preheating unit for a nuclear power emergency diesel generator set according to claim 3, characterized in that, The docking mechanism (3) also includes: The third pulley (39) is rotatably mounted in the inner cavity of the second slider (36) on the rear side via a bearing; The second slide rail rod (310) is fixedly installed on the inner bottom end of the two second sliders (36) in the front and rear directions; The slider seat (311) is sleeved on the outside of the second slide rail rod (310); The second connector tube (312) is installed on the inner bottom of the slider seat (311); The telescopic connecting pipe (313) is connected at one end to the left side of the second connector pipe (312), and the other end of the telescopic connecting pipe (313) is connected to the outlet pipe (111); The keyway cylinder (314) is rotatably connected to the top right rear of the second slider (36) on the front side via a bearing; The first bevel gear (315) is fixedly connected to the bottom outer side of the keyway cylinder (314); The fourth pulley (316) is rotatably mounted in the inner cavity of the second slider (36) on the front side via a bearing, and the right end of the shaft of the fourth pulley (316) extends out of the outside of the second slider (36); The second bevel gear (317) is fixedly connected to the right end of the shaft of the fourth pulley (316), and the second bevel gear (317) meshes with the first bevel gear (315); The second belt (318) passes through the inner openings of the two second sliders (36) in the front and rear direction. The front and rear ends of the inner side of the second belt (318) are sleeved on the outside of the fourth pulley (316) and the third pulley (39). The bottom of the second belt (318) is connected to the top of the slider seat (311). The key shaft (319) is inserted into the inner side of the keyway cylinder (314) in the vertical direction, and the top of the key shaft (319) is connected to the bottom of the rotating end of the front second transmission lock (34).

5. A preheating unit for a nuclear power emergency diesel generator set according to claim 4, characterized in that, Rotate the first handle (24) on the three sides. The first handle (24) drives the first pulley (25) on the corresponding position to rotate clockwise or counterclockwise under the transmission of the first transmission lock (23). The first belt (29) on the three sides rotates under the tensioning and limiting action of the second pulley (27), so that the first belt (29) drives the first slider (210) on the corresponding position to move along the outside of the track frame (26).

6. The method of using a preheating unit for a nuclear power emergency diesel generator set according to claim 5, characterized in that, Includes the following steps: Step 1: The staff pre-embeds the pre-embedded plate (41) on the ground of the factory according to the planned position, and welds the mounting plate (42) to the top of the pre-embedded plate (41) during installation. The unit mechanism (1) fixes the frame (11) to the surface of the mounting plate (42) with bolts (43) through the reserved holes on the frame (11). The staff rotates the first handle (24) on the three sides according to the location of the external coolant supply system connector. The first handle (24) drives the first pulley (25) on the corresponding position to rotate clockwise or counterclockwise under the transmission of the first transmission lock (23). The first belt (29) on the three sides rotates clockwise or counterclockwise under the tensioning limit action of the second pulley (27) so that the first belt (25) rotates clockwise or counterclockwise. 9) Drive the first slider (210) at the corresponding position to move to the left or right along the outside of the track frame (26). The first slider (210) drives one end of the connecting rod (211) to move horizontally to the left or right. At the same time, the connecting rod (211) rotates upward or downward with the pivot point on the outside of the first slider (210) as the axis. Then, with the cooperation of the three connecting rods (211), the mounting base (212) drives the first connector tube (213) to move to the designated position or designated angle. After the mounting base (212) moves to the designated position, the staff locks the first transmission locking device (23) to connect the first connector tube (213) with the external coolant supply system connector to adapt to the layout of the original external coolant supply system inside the factory. Step 2: According to the location of the coolant connector pipe inside the external diesel generator set, the operator rotates the second handle (35) on both the front and rear sides respectively. When the operator rotates the rear second handle (35), the screw screw (37) is driven to rotate under the transmission of the second transmission locking device (34). The screw nut (38) moves up or down under the rotational force of the screw screw (37), and drives the rear second slider (36) to move up and down outside the rear first slide rail (33). With the cooperation of the second slide rail (310), the front second slider (36) is driven to move up and down outside the front first slide rail (33), and the keyway cylinder (314) moves up and down outside the key shaft (319) while maintaining the connection. The second slide rail (310) drives the slider seat (311) to move the second connector pipe (312) up and down to the specified height position. The operator rotates the front second handle (35), and the front second handle (35) moves up and down under the transmission of the second transmission locking device (34). The locking device (34) drives the key shaft (319) to rotate, causing the key shaft (319) to rotate inside the keyway cylinder (314). At the same time, the keyway cylinder (314) drives the first bevel gear (315) to rotate. The second bevel gear (317) drives the fourth pulley (316) to rotate under the rotational force of the first bevel gear (315). The second belt (318) drives the slider seat (311) to move back and forth under the drive of the fourth pulley (316) and the tensioning and limiting action of the third pulley (39). The slider seat (311) drives the second connector tube (312) to move back and forth to the designated position along the outside of the second slide rail rod (310). After the second connector tube (312) moves to the designated position, the workers lock the second transmission locking device (34) to fix it, and connect the second connector tube (312) to the external coolant supply system connector to adapt to the original layout of the diesel generator set inside the factory. Step 3: The external coolant supply system enters the inlet pipe (16) through the first connector pipe (213) and connecting hose (214). The operator closes the first ball valve (15) and the second ball valve (19) at the corresponding positions as needed, ensuring that the water pumps (13) on both sides operate in a one-on-one standby mode. This guarantees that the other water pump (13) will not interrupt the unit's preheating operation if one water pump (13) fails or is under maintenance. The coolant inside the inlet pipe (16) enters the water pump (13) through the first ball valve (15) and inlet pipe (14) on the other side. In the unit, the water pump (13) delivers the internal coolant to the electric heater (12) through the first connecting pipe (17), check valve (18), second ball valve (19) and second connecting pipe (110). When the unit mechanism (1) is running, the check valve (18) prevents the coolant from flowing back from the outlet of the standby water pump (13). The electric heater (12) heats the internal coolant to achieve coolant preheating, and the preheated coolant enters the external diesel generator set through the outlet pipe (111), telescopic connecting pipe (313) and second connector pipe (312).

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