Self-sealing and separation linkage mechanism for tail net of nuclear power plant pollution interception net

Abstract

The present invention relates to the technical field of nuclear power plant equipment, and provides a self-sealing and separation linkage mechanism for the tail net of a nuclear power plant pollution control net, comprising: a motor, a screw transmission shaft, a transmission nut, a lifting plate, a gear rack transmission mechanism, a coupling device and a hook mechanism; the motor is installed on a machine base, and the machine base is installed on a suction device; the output shaft of the motor is connected to the screw transmission shaft; the transmission nut is screwed onto the screw transmission shaft, and the transmission nut moves up and down along the screw transmission shaft when the screw transmission shaft rotates; the transmission nut is fixedly connected to the lifting plate; the coupling device comprises: a movable gate plate, a net bag connecting plate and a net bag bracket; hook mechanisms are respectively arranged on both sides of the lifting plate; the hook mechanism comprises a hook, and the hook is inserted into the hook hole of the net bag connecting plate, and the hook can rotate. The present invention can realize the separation of the net bag connecting plate and the lifting plate all day and at any time, protect the pollution control net bag, and improve the safety of marine organism cleaning operations and water sources of nuclear power plants.

Description

Technical Field

[0001] The invention relates to the technical field of nuclear power plant equipment, and in particular to a self-sealing and separation linkage mechanism for a tail net of a nuclear power plant pollution control net. Background Art

[0002] Each reactor in a nuclear power plant requires a large amount of seawater for cooling, and the safety of the cooling source is crucial to the nuclear power plant. The cooling source pollution interception net is the main protective means to prevent marine organisms and other floating objects from entering the water intake and ensure the safety of nuclear reactors.

[0003] In the past decade, marine organisms have shown signs of outbreaks, and marine organism invasions have frequently occurred in many nuclear power plants at home and abroad, causing blockages in the cooling systems of nuclear power plants and even causing nuclear power units to shut down or reduce power. The abnormal outbreaks of various marine organisms have had an adverse impact on the normal operation of the cooling systems of nuclear power plants, directly affecting the economy, reliability and safety of nuclear power plants.

[0004] At present, nuclear power plants generally use the method of "net bag interception + manual offshore transportation and cleaning" to protect the cold source system, which requires a lot of manpower and costs, and this method is seriously affected by the weather, especially when encountering strong winds in the sea area, coupled with the outbreak period of marine organisms, the transportation and cleaning cannot be implemented, which directly affects the safe operation of the nuclear power plant. Summary of the invention

[0005] The present invention mainly solves the operation mode of the traditional artificial offshore transport and cleaning of marine organisms in the interception net bag at the water inlet, and proposes a tail net self-sealing and separation linkage mechanism, which is an important component of the nuclear power plant pollution interception net bag suction device, and technically solves the problems that the traditional method requires a lot of manpower and high costs, and is seriously affected by the weather. The suction device using the tail net self-sealing and separation linkage mechanism of the present invention can carry out cleaning operations all-weather and uninterruptedly, completely solving the safety hazards caused by artificial offshore transport and cleaning, improving economic benefits, and ensuring the safety of cold sources.

[0006] The present invention provides a nuclear power plant pollution control net tail net self-sealing and separation linkage mechanism, comprising: a motor, a screw transmission shaft, a transmission nut, a lifting plate, a gear rack transmission mechanism, a sliding guide mechanism, a coupling device and a hook mechanism;

[0007] The motor is mounted on a machine base, and the machine base is mounted on a suction device; the output shaft of the motor is connected to a screw transmission shaft; a transmission nut is screwed onto the screw transmission shaft, and the transmission nut moves up and down along the screw transmission shaft when the screw transmission shaft rotates;

[0008] The transmission nut is fixedly connected to the lifting plate; both sides of the lifting plate are connected to the suction device through sliding guide mechanisms respectively;

[0009] The coupling device comprises: a net bag connecting plate, a movable gate plate and a net bag bracket; the net bag connecting plate has a hook hole at the upper part and an elastic positioning pin at the lower part; the net bag bracket is installed on the net bag connecting plate, and the net bag bracket is connected to the tail net of the dirt-blocking net;

[0010] The movable gate plate is connected to the lifting plate through a gear rack transmission mechanism; the movable gate plate is sleeved in the net bag connecting plate, and the movable gate plate can move up and down;

[0011] Hook mechanisms are respectively arranged on both sides of the lifting plate; the hook mechanism comprises a hook; the hook is inserted into the hook hole of the net bag connecting plate, and the hook can rotate.

[0012] Preferably, the lower end of the screw drive shaft is inserted into the support base, and the upper end is connected to the motor through a bearing and a coupling.

[0013] Preferably, the sliding guide mechanism comprises: four sliding guide blocks and two guide rails;

[0014] Four sliding guide blocks are respectively installed on both sides of the lifting plate in pairs; two guide rails are arranged in parallel on the suction device; and the sliding guide blocks are sleeved on the corresponding guide rails.

[0015] Preferably, the guide rail is arranged on the suction device via a guide rail support.

[0016] Preferably, a limit switch is provided on the guide rail support; when the lifting plate moves upward to the limit switch position, the limit switch is triggered.

[0017] Preferably, the rack and pinion transmission mechanism comprises: a first rack and a second rack; a first gear and a second gear;

[0018] The first gear is meshed with the second gear and is arranged on the lifting plate; the second gear passes through the lifting plate; the first gear is meshed with the first rack, and the first rack is installed on the suction device; the second gear is meshed with the second rack, and the second rack is installed on the movable gate plate.

[0019] Preferably, the hook mechanism further includes: a third gear, a gear support frame and a third rack;

[0020] A hook is integrally arranged on the third gear, and the third gear is mounted on a rotating gear support frame; the gear support frame is fixedly connected to the lifting plate;

[0021] The third gear is meshed with a third rack, and the third rack is fixedly mounted on the suction device and is located on the side of the third gear.

[0022] Preferably, a hook positioning spring piece is installed on the lifting plate, and the hook positioning spring piece is buckled in the third gear tooth.

[0023] Preferably, the inlet end of the net bag bracket is connected to the tail net of the dirt-blocking net, and the outlet end of the net bag bracket is fixedly mounted on the net bag connecting plate.

[0024] The coupling device in the self-sealing and separation linkage mechanism of the tail net of a nuclear power plant provided by the present invention is a transition device connecting the entrance of a lifting device with the tail of the net bag of the pollution control net, one end of which is firmly connected to the tail of the net bag of the pollution control net, and the other end is reliably clamped at the entrance of the lifting device along a guide rail; the present invention is provided with a hook mechanism, which can make the net bag and the coupling device components connected thereto automatically separate when the lifting plate carries the coupling device along the guide rail to be lifted, and fall into the sea water after separation; during the lifting process of the coupling device, the sealing gate is automatically inserted into the net bag connecting plate and self-locked before separation, thereby ensuring that the waste entering the pollution control net does not leak.

[0025] The present invention adopts a mechanical method to replace the traditional artificial offshore transport and cleaning operation method of intercepting marine organisms in the net bag at the water inlet. The suction device of the tail net self-sealing and separation linkage mechanism of the present invention can implement cleaning operations around the clock and without interruption, completely solving the safety hazards caused by artificial offshore transport and cleaning, improving economic benefits, and ensuring the safety of cold sources. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the self-sealing and separation linkage mechanism of the tail net of the nuclear power plant pollution interception net provided by the present invention;

[0027] Figure 2 yes Figure 1 A partial enlarged view of

[0028] Figure 3 yes Figure 2 A partial schematic diagram of the middle A direction;

[0029] Figure 4 This is a schematic diagram of the structure of the hook mechanism Figure 1 (side);

[0030] Figure 5 This is a schematic diagram of the structure of the hook mechanism Figure 2 (Looking down).

[0031] Attached figures: 1. Motor; 2. Limit switch; 3. Guide rail support; 4. Suction device; 5. Net bag bracket; 6. First rack; 7. Transmission nut; 8. Second rack; 9. Gate; 10. First gear; 11. Second gear; 12. Lifting plate; 13. Net bag connecting plate; 14. Positioning pin; 15. Transmission shaft; 16. Guide rail; 17. Support base; 18. Hook positioning spring; 19. Third gear; 20. Hook; 21. Gear support frame; 22. Third rack. DETAILED DESCRIPTION

[0032] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for the convenience of description, only the parts related to the present invention are shown in the accompanying drawings, rather than all the contents.

[0033] like Figure 1-3 As shown, the nuclear power plant pollution control net tail net self-sealing and separation linkage mechanism provided by the embodiment of the present invention includes: a motor 1, a screw drive shaft 15, a drive nut 7, a lifting plate 12, a gear rack drive mechanism, a sliding guide mechanism, a coupling device and a hook mechanism.

[0034] The motor 1 is mounted on a machine base, and the machine base is mounted on the suction device 4 of the cold source pollution control net of the nuclear power plant; the output shaft of the motor 1 is connected to the screw transmission shaft 15; the transmission nut 7 is screwed onto the screw transmission shaft 15, and the transmission nut 7 moves up and down along the screw transmission shaft 15 when the screw transmission shaft 15 rotates. Specifically, the lower end of the screw transmission shaft 15 is inserted into the support base 17, and the upper end of the screw transmission shaft 15 is inserted into the transmission bearing, and the upper end is connected to the motor 1 through the bearing and the coupling. In addition, a limit switch 2 is set on the upper part of the guide rail support 3, which can limit and confirm the rising position of the lifting plate 12. When the lifting plate 12 moves upward to the limit switch 2, the limit switch 2 is touched, that is, the upward movement is stopped, and each time the limit switch 2 is touched, the stroke controller program confirms the initial "zero" position once.

[0035] The transmission nut 7 is fixedly connected to the lifting plate 12 by bolts; the two sides of the lifting plate 12 are connected to the suction device 4 through sliding guide mechanisms. Specifically, the sliding guide mechanism includes: four sliding guide blocks and two guide rails 16; the four sliding guide blocks are respectively installed on the two sides of the lifting plate 12; the two guide rails 16 are arranged in parallel on the suction device 4; the sliding guide blocks are sleeved on the corresponding guide rails 16. The guide rails 16 are installed on the suction device 4 through the guide rail support 3.

[0036] The coupling device includes: a net bag connecting plate 13, a movable gate plate 9 and a net bag bracket 5; the net bag connecting plate 13 has a hook hole on the upper part and an elastic positioning pin 14 on the lower part. The lifting plate 12 can be connected to the net bag connecting plate 13 through a hook; the net bag bracket 5 is installed on the net bag connecting plate 13, and the net bag bracket 5 is connected to the tail net of the dirt-blocking net. The movable gate plate 9 is sleeved in the net bag connecting plate 13, and the movable gate plate 9 is connected to the lifting plate 12 through a gear rack transmission mechanism, and can be connected to the suction device 4 through a gear rack transmission mechanism; the movable gate plate 9 is sleeved in the net bag connecting plate 13, and the movable gate plate 9 can move up and down. Specifically, the inlet end of the net bag bracket 5 is connected to the tail net of the dirt-blocking net, and the outlet end of the net bag bracket 5 is fixedly installed on the net bag connecting plate 13.

[0037] In this embodiment, the gear rack transmission mechanism includes: a first rack 6, a second rack 8, a first gear 10 and a second gear 11; the first gear 10 and the second gear 11 are meshed and arranged on a lifting plate 12; specifically, the first gear 10 and the second gear 11 are installed on the lifting plate 12 through a gear seat, and the second gear 11 passes through the lifting plate 12. The first gear 10 is meshed with the first rack 6, and the first rack 6 is installed on the suction device 4; the second gear 11 is meshed with the second rack 8, and the second rack 8 is installed on the movable gate 9.

[0038] The lifting plate 12 is provided with hook mechanisms on both sides; Figure 4 , 5 As shown, the hook mechanism includes a hook 20, which is inserted into the hook hole of the net bag connecting plate 13, and the hook 20 can rotate.

[0039] The hook mechanism also includes: a third gear 19, a gear support frame 21 and a third rack 22; a hook 20 is integrally arranged on the third gear 19, and the third gear 19 is mounted on the rotating gear support frame 21; the gear support frame 21 is fixedly connected to the lifting plate 12; the third gear 19 is meshed with the third rack 22, and the third rack 22 is fixedly mounted on the suction device and is located on the side of the third gear 19. Furthermore, a hook positioning spring 18 is installed on the lifting plate 12, and the hook positioning spring 18 is buckled in the teeth of the third gear 19 to ensure that the third gear 19 cannot rotate accidentally.

[0040] In the hook mechanism of this embodiment, when the lifting plate 12 moves, the third rack 22 causes the third gear 19 and the hook 20 to rotate, and the rotation angle of the hook 20 is adjusted by the meshing distance (number of teeth).

[0041] The present invention marks four reference positions from top to bottom along the length direction of the suction device 4:

[0042] Position one: At the upper position of the screw drive shaft 15, specifically at the position where the limit switch 2 is located, position one. At position one, the limit switch 2 is installed on the guide rail support 3 to limit the upward position of the lifting plate 12. The stroke controller program confirms the initial "zero" position and completes the separation of the coupling device and the lifting plate 12.

[0043] Position 2: Below and close to position 1, serving as the assembly position of the coupling device and the lifting plate 12.

[0044] Position three: the lifting plate 12 moves upward, and the gate plate 9 completes the blocking position.

[0045] Position 4: the lifting plate 12 moves downward, the gate plate 9 is in the fully opened position, and the inlet of the suction device 4 is connected with the outlet of the coupling device.

[0046] The working principle of the self-sealing and separation linkage mechanism of the tail net of the nuclear power plant pollution interception net of the present invention:

[0047] 1. Check and install the gate plate 9 in the net bag connecting plate 13 and locked by the positioning pin 14.

[0048] 2. Start the motor 1 to drive the screw drive shaft 15 to rotate, and the drive nut 7 moves downward along the screw drive shaft 15, and the lifting plate 12 moves from position one to position two; at position two, insert the hook 20 into the hook hole of the net bag connecting plate 13, and manually hook the hook 20 so that the hook head is in an upward vertical position to hook the net bag connecting plate 13.

[0049] 3. When suction is needed, the net bag connecting plate 13 is hooked by the hook 20, and the motor 1 is started again to drive the transmission nut 7 to drive the lifting plate 12 to move downward to position four; when the lifting plate 12 passes through position three, the first gear 10 installed on the lifting plate engages with the upper end of the first rack 6, and the second gear 11 engages with the second rack 8 to drive the gate plate 9 to disengage the positioning pin 14 and move upward until the gate plate 9 is fully opened, and the outlet of the net bag connecting plate 13 is connected to the inlet of the suction device 4; the suction device 4 can suck seawater and marine organisms.

[0050] 4. When other work is required or special circumstances are encountered, the suction device 4 stops working, and when the lifting plate 12 is at position 4, the motor 1 is started to drive the lifting plate 12 to move upward from position 4 through position 3 to position 2. When the lifting plate 12 passes through position 3, the first gear 10 installed on the lifting plate 12 meshes with the lower end of the first rack 6, driving the gate plate 9 to move downward until it is locked by the positioning pin 14, completing the blocking.

[0051] 5. When the coupling device is not required to be separated from the lifting plate 12, the driving motor 1 stops working at position 2, and routine maintenance of the coupling device and the tail net of the trash screen is carried out.

[0052] 6. When the coupling device needs to be separated from the lifting plate, the driving motor 1 continues to work and the lifting plate 12 continues to move to position 1.

[0053] 7. When the lifting plate 12 continues to move upward to position 1, the third gear 19 meshes with the third rack 22, and the third gear 19 rotates, driving the hook 20 to rotate 180°, so that the hook head is in a downward vertical position. At this time, the net bag connecting plate 13, together with the outlet blocking gate 9, the net bag bracket 5 and the tail net of the trash net, are automatically separated from the lifting plate 12 under the action of gravity.

[0054] The working process of the present invention can be operated by a programming controller on the shore or on site. In order to ensure that the deviation of each cycle stroke meets the requirements, a limit switch 2 is installed at a position, and the controller program confirms the initial "zero" position every time the lifting plate 12 touches the limit switch 2.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that modifying the technical solutions described in the aforementioned embodiments, or replacing some or all of the technical features therein by equivalents, does not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A self-sealing and separation linkage mechanism for the tail net of a nuclear power plant pollution control net, characterized in that: include: A motor (1), a screw drive shaft (15), a drive nut (7), a lifting plate (12), a rack and pinion drive mechanism, a sliding guide mechanism, a coupling device and a hook mechanism; The motor (1) is mounted on a machine base, and the machine base is mounted on a suction device (4); an output shaft of the motor (1) is connected to a screw transmission shaft (15); a transmission nut (7) is screwed onto the screw transmission shaft (15), and the transmission nut (7) moves up and down along the screw transmission shaft (15) when the screw transmission shaft (15) rotates; The transmission nut (7) is fixedly connected to the lifting plate (12); both sides of the lifting plate (12) are connected to the suction device (4) via sliding guide mechanisms; The coupling device comprises: a net bag connecting plate (13), a movable gate plate (9) and a net bag bracket (5); the net bag connecting plate (13) has a hook hole at the top and an elastic positioning pin (14) at the bottom; the net bag bracket (5) is installed on the net bag connecting plate (13), and the net bag bracket (5) is connected to the tail net of the trash net; The movable gate plate (9) is connected to the lifting plate (12) via a gear rack transmission mechanism; the movable gate plate (9) is sleeved in the net bag connecting plate (13), and the movable gate plate (9) can move up and down; Hook mechanisms are respectively arranged on both sides of the lifting plate (12); the hook mechanisms include hooks (20); the hooks (20) are inserted into hook holes of the net bag connecting plate (13), and the hooks (20) are rotatable; The rack and pinion transmission mechanism comprises: a first rack (6), a second rack (8); a first gear (10) and a second gear (11); the first gear (10) and the second gear (11) are meshed and arranged on a lifting plate (12); the second gear (11) passes through the lifting plate (12); the first gear (10) is meshed with the first rack (6), and the first rack (6) is mounted on the suction device (4); the second gear (11) is meshed with the second rack (8), and the second rack (8) is mounted on the movable gate plate (9); The hook mechanism further comprises: a third gear (19), a gear support frame (21) and a third rack (22); the third gear (19) is integrally provided with a hook (20), and the third gear (19) is mounted on the rotating gear support frame (21); the gear support frame (21) is fixedly connected to the lifting plate (12); the third gear (19) is meshed with the third rack (22), and the third rack (22) is fixedly mounted on the suction device and is located on the side of the third gear (19).

2. The nuclear power plant pollution control net tail net self-sealing and separation linkage mechanism according to claim 1 is characterized in that: The lower end of the screw transmission shaft (15) is inserted into the support base (17), and the upper end is connected to the motor (1) via a bearing and a coupling.

3. The nuclear power plant pollution control net tail net self-sealing and separation linkage mechanism according to claim 1 or 2, characterized in that: The sliding guide mechanism comprises: four sliding guide blocks and two guide rails (16); Four sliding guide blocks are respectively installed in pairs on both sides of the lifting plate (12); two guide rails (16) are arranged in parallel on the suction device (4); and the sliding guide blocks are sleeved on the corresponding guide rails (16).

4. The nuclear power plant pollution control net tail net self-sealing and separation linkage mechanism according to claim 3 is characterized in that: The guide rail (16) is arranged on the suction device (4) via a guide rail support (3).

5. The nuclear power plant pollution control net tail net self-sealing and separation linkage mechanism according to claim 4 is characterized in that: A limit switch (2) is arranged on the guide rail support member (3); when the lifting plate (12) moves upward to the position of the limit switch (2), the limit switch (2) is triggered.

6. The nuclear power plant pollution control net tail net self-sealing and separation linkage mechanism according to claim 1, characterized in that: A hook positioning spring piece (18) is mounted on the lifting plate (12), and the hook positioning spring piece (18) is buckled in the teeth of the third gear (19).

7. The nuclear power plant pollution control net tail net self-sealing and separation linkage mechanism according to claim 1, characterized in that: The inlet end of the net bag bracket (5) is connected to the tail net of the trash-blocking net, and the outlet end of the net bag bracket (5) is fixedly mounted on the net bag connecting plate (13).

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