Preheating unit for nuclear power emergency diesel generating set and using method

Abstract

The invention relates to the technical field of nuclear power, and particularly discloses a preheating unit for a nuclear power emergency diesel generating set and a using method, and the preheating unit comprises a set mechanism, a connecting mechanism and a butt joint mechanism; the connecting mechanism is arranged on the right side of the top of the unit mechanism; the butt joint mechanism is arranged on the right rear portion of the inner side of the unit mechanism. According to the preheating unit for the nuclear power emergency diesel generating set, equipment needed by preheating of the set is integrated on an integral frame to be directly installed, under the condition that the operation performance of the set is not affected, work needing to be carried out on site is greatly reduced, the construction period is effectively shortened, and the installation difficulty is effectively reduced; and the connection mode with external equipment is more flexible to adjust, so that the design, arrangement and construction difficulty of a nuclear power emergency diesel generator set plant and the difficulty of subsequent equipment upgrading and maintenance are effectively reduced.

Description

Technical Field

[0001] The invention relates to the technical field of nuclear power, and in particular to a preheating unit for a nuclear power emergency diesel generator set and a use method thereof. Background Art

[0002] Nuclear power, or nuclear energy generation, is a way of generating electricity using the heat released by the fission reaction of nuclear fuel in a nuclear reactor. In a nuclear power plant, under normal circumstances, the main power supply system in the plant supplies power to various key equipment, such as pumps and control systems of the cooling system. However, when the main power supply system loses power due to reasons such as earthquakes or external power grid failures, the emergency diesel generator set becomes a key emergency power source. As the only emergency power source after the nuclear power plant loses its plant power supply, the emergency diesel generator set is of vital importance. Its function is to provide medium-voltage emergency AC power to the nuclear power plant when the external AC power system loses power, so as to ensure the safe shutdown of the reactor and prevent accidents. In order to ensure that the unit has the ability to start at any time when the power in the plant loses power unexpectedly, it is necessary to provide the unit with cooling water in a suitable temperature range to circulate in the diesel engine to ensure that the diesel engine has reasonable heat dissipation and lubrication performance when the unit starts;

[0003] In the prior art, when designing a traditional unit auxiliary system, it is necessary to arrange water pumps, heaters, sensors, etc. in the unit plant and connect the equipment through soft and hard connections. During on-site installation, there is a lot of preparation work, a long installation time, and a large space is occupied. In addition, since the equipment planning position inside the existing unit plant is fixed, the position relationship of the docking joints needs to be considered during the installation of the unit auxiliary system, resulting in the existing unit auxiliary system The installation position is fixed, affecting subsequent maintenance and overhaul, causing inconvenience when replacing or upgrading equipment. Summary of the invention

[0004] The object of the present invention is to provide a preheating unit for a nuclear power emergency diesel generator set and a use method thereof, so as to solve the problems mentioned in the above background technology.

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

[0006] Preferably, the unit mechanism comprises: a frame, an electric heater, a water pump, a water 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 a mounting component; the frame is arranged along the front-to-back direction; the electric heater is fixedly mounted on the inner side of the frame; there are two water pumps, and the two water pumps are respectively fixedly mounted on the front and rear sides of the top of the frame; there are two water inlet pipes, and one end of the two water inlet pipes is respectively connected to the water inlets of the two water pumps; there are two first ball valves, and the two first ball valves are respectively connected to the other ends of the two water inlet pipes; the inlet pipe is installed in the middle of the right side of the top end of the frame through a bracket, and the water inlets at both ends of the inlet pipe are respectively connected to the other ends of the two water inlet pipes; the first connecting There are two connecting pipes, one end of the two first connecting pipes is connected to the outside of the water outlet of the two water pumps respectively; there are two check valves, one end of the two check valves is connected to the other end of the two first connecting pipes respectively; there are two second ball valves, the two water inlets of the second ball valves are connected to the other end of the two check valves respectively; the second connecting pipe is installed on the inner side of the frame through a bracket, the water inlets at both ends of the second connecting pipe are connected to the water outlet of the two second ball valves respectively, and the water outlet of the frame is connected to the water inlet of the electric heater; the outlet pipe is installed on the right side of the inner top end of the frame through a bracket, and the outlet pipe is connected to the water outlet of the electric heater; there are four mounting components, and the four mounting components are installed at intervals at the bottom of the frame.

[0007] Preferably, the installation components include: an embedded plate, a mounting plate and bolts; the embedded plate is arranged below the frame in the front-to-back direction and embedded in the ground; the mounting plate is fixedly installed in the middle of the top end of the embedded plate in the front-to-back direction; the number of the bolts is four, and the four bolts are respectively screwed on the four corners of the mounting plate, and the top of the bolt is connected to the internal screw hole of the frame.

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

[0009] Preferably, the connecting mechanism also includes: a first slider, a connecting rod, a mounting seat, a first joint pipe and a connecting hose; the number of the first sliders is three, and the three first sliders are respectively sleeved on the outside of the three track frames; the number of the connecting rods is three groups, and the number of the connecting rods in each group is three, and one end of the three groups of connecting rods is respectively connected to the two sides of the outside of the three first sliders through a pin shaft; the mounting seat is connected to the inner side of the other end of the three groups of connecting rods through a pin shaft; the first joint pipe is arranged on the inner side of the mounting seat; one end of the connecting hose is connected to the first joint pipe, 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 rod, a second transmission lock, a second turning handle, a second slider, a lead screw and a lead screw nut; the second locking seat is installed at the right rear of the inner side of the frame; the U-shaped frame is fixedly installed on the front side of the second locking seat; the number of the first slide rail rods is two, and the two first slide rail rods are fixedly installed at the front and rear ends of the right side of the U-shaped frame in the up and down directions; the number of the second transmission locks is two, and the two second transmission locks are respectively installed at the input ends of the two second transmission locks; the number of the second turning handles is two, and the two second turning handles are respectively installed at the rotating ends of the two first transmission locks; the number of the second sliders is two, and the two second sliders are respectively sleeved on the outside of the front and rear first slide rail rods; the lead screw is installed on the rotating end of the second transmission lock of the rear side in the up and down direction; the lead screw nut is rotatably connected to the right side of the second slider at the rear side through a bearing, and the inner side of the lead screw nut is threadedly connected to the outer side of the lead screw.

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

[0012] Preferably, the first turning handle at the three side positions is rotated, and the first turning handle drives the first pulley at the corresponding position to rotate clockwise or counterclockwise under the transmission of the first transmission locker, and the first belt at the corresponding position on the three sides rotates under the tensioning limit 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, the second turning handle on the front side is rotated, and the second turning handle on the front side drives the key shaft to rotate under the transmission of the second transmission locker, so that the key shaft rotates inside the key groove cylinder. At the same time, the key groove cylinder is driven to rotate the first bevel gear, and 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 in the forward and backward directions under the drive of the fourth pulley and the tensioning limit action of the third pulley.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. By rotating the first handle at the three side positions, the first handle drives the first pulley at the corresponding position to rotate clockwise or counterclockwise under the transmission of the first transmission locker, and the first belt at the corresponding position on the three sides rotates clockwise or counterclockwise under the tensioning limit 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, and the connecting rod rotates upward or downward with the rotation connection with the pin shaft outside the first slider as the axis, and then drives the mounting seat to drive the first joint pipe to move to a specified position or a specified angle under the cooperation of the three-side connecting rods. After the mounting seat moves to the specified position, the first joint pipe is connected to the external coolant supply system joint to adapt to the layout of the original external coolant supply system inside the factory building.

[0016] 2. By rotating the second rotating handle on the rear side and driving the lead screw to rotate under the transmission of the second transmission locker, the lead screw nut drives the second sliding block on the rear side to move up and down outside the first sliding rail rod on the rear side under the action of the lead screw, and drives the front second sliding block to move up and down outside the first sliding rail rod under the cooperation of the second sliding rail rod, and the second sliding rail rod drives the sliding block seat to drive the second joint pipe to move up and down to the specified height position, rotate the second rotating handle on the front side and drive the key shaft to rotate under the transmission of the second transmission lock, the key shaft drives the key groove cylinder to drive the first bevel gear to rotate, and the second bevel gear drives the fourth pulley to rotate under the action of the rotation force of the first bevel gear, and the second belt drives the sliding block seat to move in the front and rear direction under the drive of the fourth pulley and the tensioning limit of the third pulley, and the sliding block seat drives the second joint pipe to move in the front and rear direction to the specified position along the outside of the second sliding rail rod, and the second joint pipe is connected to the external coolant supply system joint to adapt to the layout of the original diesel generator sets in the factory building.

[0017] 3. The coolant enters the inlet pipe through the external coolant supply system through the first joint pipe and the connecting hose. The staff closes the first ball valve and the second ball valve at the corresponding position according to actual needs, so that the front and rear water pumps are used in a one-in-one-standby mode to ensure that when one water pump fails or is under maintenance, the other water pump does not interrupt the preheating operation of the unit. The coolant inside the inlet pipe enters the water pump through the first ball valve and the water inlet pipe on the other side. The water pump transports the internal coolant through the first connecting pipe, the check valve, the second ball valve and the second connecting pipe to the electric heater. The electric heater heats the internal coolant to preheat the coolant, and the preheated coolant enters the external diesel generator set through the outlet pipe, the telescopic connecting pipe and the second joint pipe.

[0018] In summary, the present invention integrates the equipment required for unit preheating and directly installs it on an overall frame. Without affecting the operating performance of the unit, it greatly reduces the work required on site, effectively shortens the construction period and installation difficulty, and makes the adjustment of the connection method with external equipment more flexible, effectively reducing the design, layout and construction difficulty of the nuclear power emergency diesel generator plant. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0020] Figure 2 for Figure 1 Schematic diagram of the unit structure;

[0021] Figure 3 for Figure 2 A right side plan view of the installation components;

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

[0023] Figure 5 for Figure 4 A magnified image of point A;

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

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

[0026] In the figure: 1, unit mechanism, 11, frame, 12, electric heater, 13, water pump, 14, water 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 card seat, 22, triangular frame, 23, first transmission locker, 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 seat, 213, first joint pipe, 21 4. Connecting hose, 3. Docking mechanism, 31. Second locking socket, 32. U-shaped frame, 33. First slide rail rod, 34. Second transmission locker, 35. Second handle, 36. Second slider, 37. Screw, 38. Screw nut, 39. Third pulley, 310. Second slide rail rod, 311. Slider seat, 312. Second joint pipe, 313. Telescopic connecting pipe, 314. Keyway cylinder, 315. First bevel gear, 316. Fourth pulley, 317. Second bevel gear, 318. Second belt, 319. Key shaft, 4. Mounting parts, 41. Embedded plate, 42. Mounting plate, 43. Bolts. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

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

[0029] As a preferred solution, further, the unit mechanism 1 includes: a frame 11, an electric heater 12, a water pump 13, a water 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 a mounting component 4; the frame 11 is arranged along the front-to-back direction, and a lifting lug is arranged on the top of the frame 11 for lifting to facilitate the overall transportation of the unit; the electric heater 12 is fixedly installed on the inner side of the frame 11; the number of water pumps 13 is two, and the two water pumps 13 are respectively The water pumps 13 on both sides are fixedly installed on the front and rear sides of the top of the frame 11. The water pumps 13 on both sides are used in a one-in-one-standby mode to ensure that when one water pump 13 fails or is under maintenance, the other water pump 13 does not interrupt the preheating operation of the unit; there are two water inlet pipes 14, one end of the two water inlet pipes 14 is respectively connected to the water inlets of the two water pumps 13; there are two first ball valves 15, and the two first ball valves 15 are respectively connected to the other ends of the two water inlet pipes 14; the inlet pipe 16 is installed in the middle of the right side of the top of the frame 11 through a bracket, and the water inlets at both ends of the inlet pipe 16 are respectively The first connecting pipes 17 are respectively connected to the other ends of the two water inlet pipes 14; the number of the first connecting pipes 17 is two, and one end of the two first connecting pipes 17 is respectively connected to the outside of the water outlets of the two water pumps 13; the number of the check valves 18 is two, and one end of the two check valves 18 is respectively connected to the other ends of the two first connecting pipes 17, and the check valves 18 can prevent the coolant from flowing back from the outlet of the standby water pump 13 when the unit mechanism 1 is running, so as to avoid the reduction of the pumped coolant flow and the reverse damage of the water pump 13; the number of the second ball valves 19 is two, and the two second ball valves The water inlet 19 is respectively connected to the other end of the two check valves 18; the second connecting pipe 110 is installed on the inner side of the frame 11 through a bracket, and the water inlets at both ends of the second connecting pipe 110 are respectively connected to the water outlets of the two second ball valves 19, and the water outlet of the frame 11 is connected to the water inlet of the electric heater 12; the outlet pipe 111 is installed on the right side of the inner top end of the frame 11 through a bracket, and the outlet pipe 111 is connected to the water outlet of the electric heater 12; the number of mounting components 4 is four, and the four mounting components 4 are installed at intervals at the bottom of the frame 11.

[0030] As a preferred solution, further, the mounting component 4 includes: an embedded plate 41, a mounting plate 42 and bolts 43; the embedded plate 41 is arranged below the frame 11 along the front-to-back direction and is embedded in the ground; the mounting plate 42 is fixedly installed in the middle of the top end of the embedded plate 41 along the front-to-back direction; the number of bolts 43 is four, and the four bolts 43 are respectively screwed on the four corners of the mounting plate 42, and the top of the bolt 43 is connected to the internal screw hole of the frame 11.

[0031] As a preferred solution, further, Figure 4 and Figure 5As shown, the connecting mechanism 2 includes: a first locking card seat 21, a triangular frame 22, a first transmission locker 23, a first 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 seat 212, a first joint pipe 213 and a connecting hose 214; the number of the first locking card seats 21 is two, and the two first locking card seats 21 are respectively mounted on the front and rear ends of the top right side of the frame 11, and a locking mechanism is arranged inside the first locking card seat 21, so that the first locking card seat 21 can be detachably mounted on the top of the frame 11; the triangular frame 22 is fixedly mounted on the top of the front and rear first locking card seats 21; the number of the first transmission lockers 23 is three, and the three first locking card seats 21 are respectively mounted on the front and rear ends of the frame 11. A transmission locker 23 is fixedly installed at the left triangular position of the triangular frame 22, and a locking mechanism is arranged inside the first locking seat 21, which plays a transmission role between the first rotating handle 24 and the first pulley 25 and locks and fixes the first rotating handle 24 at the same time; there are three first rotating handles 24, and the three first rotating handles 24 are respectively screwed on the input ends of the three first transmission lockers 23; there are three first pulleys 25, and the three first pulleys 25 are respectively installed at the rotating ends of the three first transmission lockers 23; there are three track frames 26, and the three track frames 26 are respectively fixedly installed at the right triangular position of the triangular frame 22 along the left and right directions; there are three second pulleys 27, and the three second pulleys 27 are respectively installed on the three through the rotating shaft seats At the inner right end of the track frame 26, the second pulley 27 plays a role in tensioning and limiting the first belt 29; the number of through holes 28 is three, and the three through holes 28 are respectively opened at the triangular positions of the triangular frame 22; the number of first belts 29 is three, and the three first belts 29 are respectively sleeved on the outside of the three first pulleys 25 and the second pulleys 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, and the first belt 29 rotates clockwise or counterclockwise under the drive of the first pulley 25 to drive the first slider 210 to move to the left or right; the number of first sliders 210 is three, and the three first sliders 210 are respectively sleeved on the outside of the three track frames 26, and the first sliders 210 It can move horizontally in the left and right directions outside the track frame 26; there are three groups of connecting rods 211, and each group of connecting rods 211 has three connecting rods. One end of the three groups of connecting rods 211 is respectively connected to the two sides of the outside of the three first sliders 210 through a pin shaft, and the connecting rod 211 can rotate upward or downward with the external pin shaft connection with the first slider 210 as the axis; the mounting seat 212 is connected to the inner side of the other end of the three groups of connecting rods 211 through a pin shaft; the first joint pipe 213 is arranged on the inner side of the mounting seat 212; one end of the connecting hose 214 is connected to the first joint pipe 213, and the other end of the connecting hose 214 is connected to the inlet pipe 16. The connecting hose 214 itself has an elastic telescopic function and can move with the first joint pipe 213.

[0032] As a preferred solution, further, Figure 5 and Figure 6As shown, the docking mechanism 3 includes: a second locking card seat 31, a U-shaped frame 32, a first slide rail rod 33, a second transmission locker 34, a second 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 joint pipe 312, a telescopic connecting pipe 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 card seat 31 is installed at the inner right rear of the frame 11, and a locking mechanism is arranged inside the second locking card seat 31, so that the second locking card seat 31 can be detachably installed on the inner side of the frame 11; the U-shaped frame 32 is fixedly installed on the second locking card seat 31 The front side of the first slide rail 33; the number of the first slide rail rods 33 is two, and the two first slide rail rods 33 are respectively fixedly mounted on the front and rear ends of the right side of the U-shaped frame 32 in the up and down direction; the number of the second transmission locks 34 is two, and the two second transmission locks 34 are respectively mounted on the input ends of the two second transmission locks 34, and the second transmission locks 34 are provided with a locking mechanism inside, which plays a role in transmitting the second turning handle 35 and the lead screw 37 and the lead screw 37, and can lock and fix the second turning handle 35; the number of the second turning handles 35 is two, and the two second turning handles 35 are respectively mounted on the rotating ends of the two first transmission locks 23; the number of the second sliders 36 is two, and the two second sliders 36 are respectively sleeved on the front and rear of the two first slide rail rods 33 The second slider 36 can move up and down on the outside of the first slide rail rod 33; the lead screw 37 is installed at the rotating end of the second transmission locker 34 at the rear side in the up and down direction; the lead screw nut 38 is rotatably connected to the right side of the second slider 36 at the rear side through a bearing, and 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 rotation force of the lead screw 37; the third pulley 39 is rotatably installed in the inner cavity of the second slider 36 at the rear side through a bearing; the second slide rail rod 310 is fixedly installed at the inner bottom end of the two second sliders 36 at the front and rear directions; the slider seat 311 is sleeved on the outside of the second slide rail rod 310, and the slider seat 311 can move horizontally in the front and rear directions on the outside of the second slide rail rod 310; the second connecting rod 310 The head tube 312 is installed at 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 joint 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 joint tube 312; the key groove cylinder 314 is rotatably connected to the right rear of the top of the front second slider 36 through a bearing; the first bevel gear 315 is fixedly connected to the outer bottom of the key groove cylinder 314, and can drive the key groove 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 axis of the fourth pulley 316 extends outside the second slider 36;The second bevel gear 317 is fixedly connected to the right end of the axis of the fourth pulley 316. The second bevel gear 317 is meshed with the first bevel gear 315. The second bevel gear 317 can drive the fourth pulley 316 to rotate under the action of the rotation force of the first bevel gear 315. The second belt 318 passes through the inner openings of the front and rear second sliders 36 in the front and rear directions. The inner front and rear ends 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 key groove cylinder 314 in the up and down direction. The top of the key shaft 319 is connected to the bottom of the rotating end of the front second transmission locker 34.

[0033] Here’s how it works:

[0034] Step 1: The staff pre-embeds the embedded plate 41 on the floor of the factory building according to the planned position, and welds the mounting plate 42 to the top of the embedded plate 41 during installation. The unit mechanism 1 is fixed to the surface of the mounting plate 42 by bolts 43 through the reserved holes on the frame 11. The staff rotates the first handle 24 on the three sides according to the position of the external coolant supply system joint. 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 locker 23. The first belt 29 on the corresponding position on the three sides rotates clockwise or counterclockwise under the tension limit of the second pulley 27, so that the first belt 29 drives the first belt 29 to rotate clockwise or counterclockwise. The first slider 210 at the corresponding position moves to the left or right along the outside of the track frame 26, and 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 rotation connection with the outer pin shaft of the first slider 210 as the axis, and then drives the mounting seat 212 to drive the first joint pipe 213 to move to a specified position or a specified angle under the cooperation of the three-side connecting rods 211. After the mounting seat 212 moves to the specified position, the staff locks the first transmission locker 23 to connect the first joint pipe 213 with the external coolant supply system joint to adapt to the layout of the original external coolant supply system inside the factory building for adjustment;

[0035] Step 2: The staff rotates the second handles 35 at the front and rear positions according to the position of the coolant joint pipe inside the external diesel generator set. The staff rotates the rear second handle 35 to drive the lead screw 37 to rotate under the transmission of the second transmission locker 34. The lead screw nut 38 moves upward or downward under the action of the rotational force of the lead screw 37, and drives the rear second slider 36 to move up and down outside the rear first slide rail rod 33. With the cooperation of the second slide rail rod 310, the front second slider 36 is driven to move up and down outside the front first slide rail rod 33, and the key groove cylinder 314 is moved up and down outside the key shaft 319 while maintaining a connected state. The second slide rail rod 310 drives the slider seat 311 to drive the second joint pipe 312 to move up and down to a specified height position. The staff rotates the front second handle 35, and the front second handle 35 is rotated in the second transmission locker 34. The key shaft 319 is driven to rotate under the transmission of the dynamic locker 34, so that the key shaft 319 rotates inside the key groove cylinder 314. At the same time, the key groove cylinder 314 drives the first bevel gear 315 to rotate. The second bevel gear 317 drives the fourth pulley 316 to rotate under the action of the rotational force of the first bevel gear 315. The second belt 318 drives the slider seat 311 to move in the front-to-back direction under the drive of the fourth pulley 316 and the tension limit action of the third pulley 39. The slider seat 311 drives the second joint pipe 312 to move in the front-to-back direction along the outside of the second slide rail rod 310 to a specified position. After the second joint pipe 312 moves to the specified position, the staff locks the second transmission locker 34 to fix it, and docks the second joint pipe 312 with the external coolant supply system joint to adapt to the layout of the original diesel generator sets in the factory building.

[0036] Step 3: The external coolant supply system enters the inlet pipe 16 through the first joint pipe 213 and the connecting hose 214. The staff closes the first ball valve 15 and the second ball valve 19 at the corresponding positions according to actual needs, so that the front and rear water pumps 13 are used in a one-in-one-standby mode to ensure that when one water pump 13 fails or is under maintenance, the other water pump 13 does not interrupt the unit preheating operation. 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 transports the internal coolant through the first connecting pipe 17, the check valve 18, the second ball valve 19 and the second connecting pipe 110 to the electric heater 12. When the unit mechanism 1 is running, the check valve 18 prevents the coolant from backflowing 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, the telescopic connecting pipe 313 and the second joint pipe 312.

[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention 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 mechanism (1); A connecting mechanism (2) is arranged on the top right side of the unit mechanism (1); A docking mechanism (3) is arranged at the right rear of the inner side of the unit mechanism (1); The unit mechanism (1) comprises: A frame (11), wherein the frame (11) is arranged along the front-rear direction; An electric heater (12) is fixedly mounted inside the frame (11); A water pump (13), wherein the number of the water pumps (13) is two, and the two water pumps (13) are respectively fixedly mounted on the front and rear sides of the top of the frame (11); A water inlet pipe (14), wherein the number of the water inlet pipes (14) is two, and one end of the two water inlet pipes (14) is respectively connected to the water inlets of the two water pumps (13); A first ball valve (15), wherein the number of the first ball valves (15) is two, and the two first ball valves (15) are respectively connected to the other ends of the two water inlet pipes (14); An inlet pipe (16) is installed at the middle right side of the top end of the frame (11) through a bracket, and the water inlets at both ends of the inlet pipe (16) are respectively connected to the other ends of the two water inlet pipes (14); A first connecting pipe (17), wherein the number of the first connecting pipes (17) is two, and one end of the two first connecting pipes (17) is respectively connected to the outside of the water outlets of the two water pumps (13); Check valves (18), the number of the check valves (18) being two, one end of the two check valves (18) being respectively connected to the other end of the two first connecting pipes (17); A second ball valve (19), wherein the number of the second ball valves (19) is two, and the water inlets of the two second ball valves (19) are respectively connected to the other ends of the two check valves (18); A second connecting pipe (110) is installed on the inner side of the frame (11) through a bracket, the water inlets at both ends of the second connecting pipe (110) are respectively connected to the water outlets of the two second ball valves (19), and the water outlet of the frame (11) is connected to the water inlet of the electric heater (12); An outlet pipe (111) is installed on the right side of the inner top end of the frame (11) through a bracket, and the outlet pipe (111) is connected to the water outlet of the electric heater (12); Mounting components (4), the number of the mounting components (4) is four, and the four mounting components (4) are installed at intervals at the bottom of the frame (11).

2. A preheating unit for a nuclear power emergency diesel generator set according to claim 1, characterized in that: The mounting component (4) comprises: An embedded plate (41) is arranged below the frame (11) along the front-rear direction and embedded in the ground; A mounting plate (42) fixedly mounted on the middle portion of the top end of the embedded plate (41) along the front-to-back direction; Bolts (43), the number of the bolts (43) is four, the four bolts (43) are respectively screwed on the four corners of the mounting plate (42), and the tops of the bolts (43) are 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 connecting mechanism (2) comprises: A first locking card seat (21), the number of the first locking card seats (21) is two, and the two first locking card seats (21) are respectively installed at the front and rear ends of the top right side of the frame (11); A triangular frame (22) is fixedly mounted on the top of the two front and rear first locking seats (21); A first transmission locker (23), the number of the first transmission lockers (23) is three, and the three first transmission lockers (23) are respectively fixedly installed at the left triangular position of the triangular frame (22); A first rotating handle (24), wherein the number of the first rotating handles (24) is three, and the three first rotating handles (24) are respectively screwed to the input ends of the three first transmission lockers (23); A first pulley (25), wherein the number of the first pulleys (25) is three, and the three first pulleys (25) are respectively mounted on the rotating ends of the three first transmission lockers (23); Track frames (26), the number of the track frames (26) is three, and the three track frames (26) are respectively fixedly installed at the right triangular position of the triangular frame (22) along the left-right direction; A second belt pulley (27), wherein the number of the second belt pulleys (27) is three, and the three second belt pulleys (27) are respectively installed on the inner right ends of the three track frames (26) through rotating shaft seats; Through holes (28), the number of the through holes (28) is three, and the three through holes (28) are respectively opened at triangular positions of the triangular frame (22); A first belt (29), wherein the number of the first belts (29) is three, and the three first belts (29) are respectively sleeved on the outside of the three first pulleys (25) and the second pulley (27) in the left-right direction, and the inner sides of the three first belts (29) are respectively connected to the outer sides of the three first sliders (210).

4. A preheating unit for a nuclear power emergency diesel generator set according to claim 3, characterized in that: The connecting mechanism (2) further comprises: A first sliding block (210), wherein the number of the first sliding blocks (210) is three, and the three first sliding blocks (210) are respectively sleeved on the outside of three track frames (26); Connecting rods (211), the number of the connecting rods (211) being three groups, the number of the connecting rods (211) in each group being three, and one section of the three groups of connecting rods (211) being rotatably connected to two sides of the outside of the three first sliding blocks (210) respectively through pin shafts; The mounting seat (212) is rotatably connected to the inner side of the other end of the three groups of connecting rods (211) through a pin shaft; A first joint pipe (213) is arranged on the inner side of the mounting seat (212); A connecting hose (214) has one end connected to the first joint pipe (213), and the other end of the connecting hose (214) is connected to the inlet pipe (16).

5. A preheating unit for a nuclear power emergency diesel generator set according to claim 4, characterized in that: The docking mechanism (3) comprises: A second locking seat (31) is installed at the right rear of the inner side of the frame (11); A U-shaped frame (32) fixedly mounted on the front side of the second locking base (31); A first slide rail rod (33), wherein the number of the first slide rail rods (33) is two, and the two first slide rail rods (33) are respectively fixedly mounted at the front and rear ends of the right side of the U-shaped frame (32) in the up-down direction; A second transmission locker (34), wherein the number of the second transmission lockers (34) is two, and the two second transmission lockers (34) are respectively installed at the input ends of the two second transmission lockers (34); A second rotating handle (35), the number of the second rotating handle (35) is two, and the two second rotating handles (35) are respectively mounted on the rotating ends of the two first transmission lockers (23); A second sliding block (36), wherein the number of the second sliding blocks (36) is two, and the two second sliding blocks (36) are respectively sleeved on the outside of the two front and rear first sliding rail rods (33); A lead screw (37) is installed at the rotating end of the second transmission locker (34) at the rear side in the up-down direction; The lead screw nut (38) is rotatably connected to the right side of the second slider (36) at the rear side through a bearing, and the inner side of the lead screw nut (38) is threadedly connected to the outer side of the lead screw (37).

6. A preheating unit for a nuclear power emergency diesel generator set according to claim 5, characterized in that: The docking mechanism (3) further comprises: A third pulley (39) is rotatably mounted in the inner cavity of the second slider (36) at the rear side through a bearing; A second slide rail rod (310) is fixedly mounted on the inner bottom ends of the two second slide blocks (36) in the front-rear direction; A slider seat (311) sleeved on the outside of the second slide rail rod (310); A second joint pipe (312) is installed on the inner bottom of the slider seat (311); A telescopic connecting pipe (313), one end of which is connected to the left side of the second joint pipe (312), and the other end of which is connected to the outlet pipe (111); A keyway cylinder (314) is rotatably connected to the top right rear of the second slider (36) on the front side through a bearing; A first bevel gear (315) is fixedly connected to the outer bottom of the key groove cylinder (314); A fourth pulley (316) is rotatably mounted in the inner cavity of the second slider (36) at the front side through a bearing, and the right end of the axis of the fourth pulley (316) extends out of the second slider (36); A second bevel gear (317) is fixedly connected to the right end of the axis of the fourth pulley (316), and the second bevel gear (317) is meshed with the first bevel gear (315); A second belt (318) passes through the inner openings of the two second sliders (36) in the front-to-back direction, the inner front and rear ends of the second belt (318) are sleeved on the outside of the fourth pulley (316) and the third pulley (39), and 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 key groove cylinder (314) along the up-down direction, and the top of the key shaft (319) is connected to the bottom of the rotating end of the second transmission locker (34) on the front side.

7. A preheating unit for a nuclear power emergency diesel generator set according to claim 6, characterized in that: The first rotating handle (24) at the three side positions is rotated, and the first rotating handle (24) drives the first pulley (25) at the corresponding position to rotate clockwise or counterclockwise under the transmission of the first transmission locker (23), and the first belt (29) at the corresponding position 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) at the corresponding position to move along the outside of the track frame (26).

8. The method for using a preheating unit for a nuclear power emergency diesel generator set according to claim 7, characterized in that: The following steps are involved: Step 1: The staff pre-buries the embedded plate (41) on the floor of the factory building according to the planned position, and welds the mounting plate (42) to the top of the embedded plate (41) during installation. The unit mechanism (1) passes through the reserved hole on the frame (11), and the frame (11) is fixed to the surface of the mounting plate (42) using bolts (43). The staff rotates the first handle (24) at the three side positions according to the position of the external coolant supply system connector. The first handle (24) drives the first pulley (25) at the corresponding position to rotate clockwise or counterclockwise under the transmission of the first transmission locker (23). The first belt (29) at the corresponding position on the three sides rotates clockwise or counterclockwise under the tension limit of the second pulley (27), so that the first belt (2 9) driving the first slider (210) at the corresponding position to move to the left or right along the outside of the track frame (26), and the first slider (210) drives one end of the connecting rod (211) to move to the left or right horizontally. At the same time, the connecting rod (211) rotates upward or downward with the rotation connection with the outer pin shaft of the first slider (210) as the axis, and then drives the mounting seat (212) to drive the first joint pipe (213) to move to a specified position or a specified angle under the cooperation of the three-side connecting rods (211). After the mounting seat (212) moves to the specified position, the staff locks the first transmission locker (23) to connect the first joint pipe (213) with the external coolant supply system joint, so as to adapt to the layout of the original external coolant supply system inside the factory building for adjustment; Step 2: The staff rotates the second handles (35) at the front and rear sides respectively according to the position of the coolant joint pipe inside the external diesel generator set. The staff rotates the rear second handle (35) to drive the lead screw (37) to rotate under the transmission of the second transmission locker (34). The lead screw nut (38) moves upward or downward under the action of the rotational force of the lead screw (37), and drives the rear second slider (36) to move up and down outside the rear first slide rail (33). Under 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 key groove cylinder (314) is moved up and down outside the key shaft (319) while maintaining a connected state. The second slide rail (310) drives the slider seat (311) to drive the second joint pipe (312) to move up and down to a specified height position. The staff rotates the front second handle (35). The front second handle (35) is locked in the second transmission locker (34). The key shaft (319) is driven to rotate under the transmission of the tightener (34), so that the key shaft (319) rotates inside the key groove cylinder (314), and at the same time, the key groove cylinder (314) is driven to drive the first bevel gear (315) to rotate. The second bevel gear (317) drives the fourth pulley (316) to rotate under the action of the rotational force of the first bevel gear (315). The second belt (318) drives the slider seat (311) to move in the front-to-back direction under the drive of the fourth pulley (316) and the tensioning limit action of the third pulley (39). The slider seat (311) drives the second joint pipe (312) to move in the front-to-back direction to a specified position along the outside of the second slide rail rod (310). After the second joint pipe (312) moves to the specified position, the staff locks the second transmission locker (34) to fix it, and connects the second joint pipe (312) with the external coolant supply system joint to adapt to the layout of the original diesel generator set inside the factory building. Step 3: The external coolant supply system enters the inlet pipe (16) through the first joint pipe (213) and the connecting hose (214). The staff closes the first ball valve (15) and the second ball valve (19) at the corresponding position according to actual needs, so that the front and rear water pumps (13) are used in a one-in-one-standby mode to ensure that when one water pump (13) fails or is under maintenance, the other water pump (13) does not interrupt the preheating operation of the unit. 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 interior of the electric heater (12) through the first connecting pipe (17), the check valve (18), the second ball valve (19) and the second connecting pipe (110). The check valve (18) prevents the coolant from flowing back from the outlet of the standby water pump (13) when the unit mechanism (1) is running. The electric heater (12) heats the internal coolant to preheat the coolant, and allows the preheated coolant to enter the external diesel generator set through the outlet pipe (111), the telescopic connecting pipe (313) and the second joint pipe (312).

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