Segmented flexible scraper tunnel cleaning device

Abstract

The present disclosure belongs to the field of nuclear power technology, and specifically relates to a segmented flexible scraper tunnel cleaning device. In the present disclosure, when the rotary mechanism drives the eccentric wheel to rotate, the transmission rod drives multiple cutter head rocker plates to move synchronously. The blade located at the raised portion of the cutter head rocker plate first moves toward the inner wall of the tunnel, scrapes and cuts the attachments attached to the outer layer of the inner wall of the tunnel, and then retracts under the drive of the rocker arm; during the retraction of the blade located at the raised portion of the cutter head rocker plate, the blade located at the upper end of the cutter head rocker plate moves toward the inner wall of the tunnel, scrapes and cuts the attachments on the inner layer more deeply, and then retracts under the drive of the rocker arm. In this way, the rocker arm, driven by the rotary mechanism, drives the cutter head rocker plate to form a reciprocating hoeing action. Each reciprocating motion can remove attachments at different depths twice, which is conducive to more thorough removal of stubborn attachments and thereby greatly improves the efficiency of tunnel cleaning.

Description

Technical Field

[0001] The invention belongs to the technical field of nuclear power, and in particular relates to a segmented flexible scraper tunnel cleaning device. Background Art

[0002] The blockage of seawater intake culverts by marine organisms in nuclear power plants will reduce the speed of water diversion. In severe cases, it will cause the circulating pump to trip, the unit's heat sink to be lost, and the unit to shut down or even stop the reactor. Therefore, it is necessary to regularly clean the marine organisms (barnacles, shells) attached to the inner wall of the water intake culvert to ensure that the seawater intake culvert pipeline of the nuclear power plant is unobstructed.

[0003] Currently, the cleaning work on the inner wall of the water intake culvert is mainly done manually. Manual operation has the following problems: 1) harsh environment and high work intensity; 2) industrial safety issues; 3) low work efficiency.

[0004] In summary, the cleaning of the inner wall of the water intake culvert of a nuclear power plant urgently needs to reduce personal safety and work risks of personnel and improve the efficiency of the cleaning work. Summary of the Invention

[0005] In order to overcome the problems existing in the related art, a segmented flexible scraper tunnel cleaning device is provided.

[0006] According to one aspect of an embodiment of the present disclosure, a segmented flexible scraper tunnel cleaning device is provided, the device comprising: a folding arm adapter plate, a scraper base plate, a plurality of folding arm springs, a plurality of cutter head springs, a plurality of cutter head rocker arm pieces, a plurality of cutter holders, a plurality of blades, and a rocker arm;

[0007] The rocker arm includes an eccentric wheel and a transmission rod. The folding arm adapter plate includes an L-shaped protrusion structure and a connecting plate. The axis of the eccentric wheel is connected to the shaft of the rotary mechanism. One end of the transmission rod is fixedly connected to a first position on the edge of the eccentric wheel. The other end of the transmission rod is connected to one end of the protrusion structure through the folding arm rotating shaft. The other end of the protrusion structure is fixedly connected to the connecting plate.

[0008] One end of each folding arm spring is fixedly connected to a second position on the edge of the eccentric wheel that is different from the first position, and the other end of the folding arm spring is fixedly connected to a position on the protrusion structure between the bend of the protrusion structure and the eccentric wheel;

[0009] The scraper base plate is opposite to the folding arm adapter plate, and the scraper base plate is connected to the connecting plate shaft of the folding arm adapter plate, the bottom end of each cutter head spring base is fixedly connected to the upper end of the scraper base plate, and each cutter head spring base is arranged in parallel between the head scraper base plate and the folding arm adapter plate, the bottom end of each cutter head rocker arm piece is fixedly connected to the bottom end of the scraper base plate, the angle between each cutter head rocker arm piece and the scraper base plate is an acute angle, and each cutter head rocker arm piece is arranged in parallel, each cutter head rocker arm piece is facing a cutter head spring base, and a cutter head spring is fixedly connected between the upper ends of every two facing cutter head rocker arm pieces and the upper end of the cutter head spring base;

[0010] For each cutter head rocker arm, the top of the cutter head rocker arm is connected to a blade. There is a raised portion between the two ends of the cutter head rocker arm. The top of the raised portion is connected to a blade through the tool holder. The angle between the blade and the cutter head rocker arm is adjustable.

[0011] In one possible implementation, for each cutter head rocker arm plate, a first bolt hole is provided on the upper end and the raised portion of the cutter head rocker arm plate, the upper end of the cutter head rocker arm plate and the corresponding tool holder are connected via a front fixed shaft of the rocker arm plate, and the raised portion of the cutter head rocker arm plate and the corresponding tool holder are also connected via a front fixed shaft of the rocker arm plate. A plurality of second bolt holes are evenly surrounded on each tool holder with the front fixed shaft of the rocker arm plate as the center, and each second bolt hole of each tool holder can be aligned with the first bolt hole of the corresponding axis connection part on the cutter head rocker arm plate, and the tool holder and the cutter head rocker arm plate are fixed by bolts in an adaptive manner. When different second bolt holes on the tool holder are aligned with the first bolt holes and tightened, the angles between the blade connected to the tool holder and the cutter head rocker arm plate are different.

[0012] In one possible implementation, when the eccentric wheel is driven by the rotary mechanism to rotate, the multiple cutter head rocker plates are driven to move synchronously via the transmission rod. The blade located on the raised portion of the cutter head rocker plate first moves toward the inner wall of the tunnel, scraping off the attachments attached to the outer layer of the inner wall of the tunnel, and then retracts under the drive of the rocker arm.

[0013] During the retraction of the blade located at the raised portion of the cutter head rocker arm, the blade located at the upper end of the cutter head rocker arm moves toward the inner wall of the tunnel, scrapes the inner layer of attachments more deeply, and then retracts under the drive of the rocker arm.

[0014] In a possible implementation, when the segmented flexible scraper tunnel cleaning device is not subjected to force, the cutter head spring and the folding arm spring are in an uncompressed state;

[0015] When the cutter head contacts the wall and continues to push toward the wall, the cutter head spring gives the cutter head a reverse thrust, making the cutter head contact the wall more closely;

[0016] When the cutter head encounters an overly hard attachment or touches the inner wall of the tunnel, the cutter head is pushed toward the wall, causing the cutter head spring to compress. When the cutter head spring is fully compressed, the folding arm adapter plate pushes the folding arm spring to compress. The folding arm spring begins to compress backward.

[0017] In a possible implementation, the encoder is mounted on the eccentric wheel via a limit mask to detect the rotation angle of the scraper.

[0018] In one possible implementation, the scraper base plate is connected to the folding arm adapter plate through a rotating shaft and a bushing, and multiple tension springs are connected between the connecting plate and the scraper base plate. Each tension spring is connected to the connecting plate and the scraper base plate through a tension spring base.

[0019] In a possible implementation, the folding arm spring and the cutter head spring are nitrogen springs.

[0020] The beneficial effect of the present disclosure is that: the present invention mainly addresses the above-mentioned problem and develops an end effector for automatic cleaning equipment for water intake culvert pipes, which can be used to clean marine organisms on the inner wall of the tunnel. Its core lies in its ability to better fit the inner wall and efficiently complete the cleaning operation.

[0021] 1. Adaptability: This ensures that the cutter head always adheres to the tunnel wall during operation. In one application example, the device's radial adaptability is 150 mm, allowing the entire cutter head to swing within a small range, thereby adapting to the irregular shape of the water intake culvert wall to ensure effective cleaning.

[0022] 2. Environmental adaptability: a two-layer cutter head is designed, and the cutting angle can be manually adjusted. The appropriate cutting angle is selected according to the size of different tunnel structures. The main cutter and auxiliary cutter are selected to meet the requirements of pollution cleaning. The cutter head is swung in the axial direction of the tunnel through the tension spring to meet the pollution cleaning needs of bends, etc.

[0023] 3. Safety: two-level safety redundancy design and adaptive adjustment ensure that the cutter head pressure is within a safe range under any working conditions.

[0024] Furthermore, compared to manual cleaning, the automated culvert cleaning system eliminates the need for personnel to operate in a semi-enclosed environment, significantly reducing safety risks while improving operational efficiency and stability. The disclosed device boasts a simple overall structure, excellent reliability, quick and easy installation, and robust installation stability. It can be used in all nuclear power units and has broad application prospects.

[0025] The invention is applicable to all nuclear power units and has high economic value. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1It is a stereoscopic view of a segmented flexible scraper tunnel cleaning device according to an exemplary embodiment.

[0027] Figure 2 It is a schematic diagram showing a segmented flexible scraper tunnel cleaning device in use according to an exemplary embodiment.

[0028] In the picture:

[0029] 1-Folding arm adapter plate, 100-Protrusion structure, 101-Connecting plate, 2-Scraper bottom plate, 3-Tension spring base,

[0030] 4-cutter head spring base, 5-folding arm spring, 6-cutter head spring, 7-cutter head rocker arm, 8-cutter holder,

[0031] 9-blade, 10-tension spring, 11-bushing, 12-small bushing, 13-rocker arm front fixed shaft,

[0032] 14-scraper base plate rotating shaft, 15-rocker arm, 150-eccentric wheel, 151-transmission rod, 16-first spring support, 17-limiting mask, 18-encoder, 19-folding arm rotating shaft, 20-second spring support. DETAILED DESCRIPTION

[0033] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] Figure 1 is a perspective view of a segmented flexible scraper tunnel cleaning device according to an exemplary embodiment. Figure 1 As shown, the segmented scraper tunnel cleaning device includes: a folding arm adapter plate 1, a scraper base plate 2, a tension spring base 3, a cutter head spring base 4, a folding arm spring 5, a cutter head spring 6, a cutter head rocker arm piece 7, a tool holder 8, a blade 9, a tension spring 10, a bushing 11, a small bushing 12, a front fixed shaft 13 of the rocker arm piece, a rotating shaft 14, a rocker arm 15, a first spring support 16, a limit mask 17, an encoder 18, a folding arm rotating shaft 19, a second spring support 20, and a folding arm adapter plate movable hinge 21.

[0035] Figure 2 This is a schematic diagram of a segmented flexible scraper tunnel cleaning device in use according to an exemplary embodiment, combined with Figure 1 and Figure 2The rocker arm 15 includes an eccentric wheel 150 and a transmission rod 151. The folding arm adapter plate 1 includes an L-shaped protrusion structure 100 and a connecting plate 101. The axis of the eccentric wheel 150 is connected to the axis of the rotating mechanism (not shown in the figure). One end of the transmission rod 151 is fixedly connected to the first position on the edge of the eccentric wheel 150. The other end of the transmission rod 151 is connected to one end of the protrusion structure 100 through the folding arm rotating shaft 19. The other end of the protrusion structure 100 is fixedly connected to the connecting plate 101.

[0036] One end of the folding arm spring 5 is fixedly connected to a second position on the edge of the eccentric wheel 150 (the second position is different from the first position), and the other end of the folding arm spring 5 can be fixedly connected to a position on the protrusion structure 100 between the bending point of the protrusion structure and the eccentric wheel 150 through the first spring support 16.

[0037] The scraper base plate 2 is opposite the folding arm adapter plate 1 and is axially connected to the connecting plate 101 of the folding arm adapter plate 1 via the scraper base plate rotation axis. The bottom end of each cutter head spring base 4 is fixedly connected to the top end of the scraper base plate 2, and each cutter head spring base 4 is arranged side by side between the scraper base plate 2 and the folding arm adapter plate 1. The bottom end of each cutter head rocker arm 7 is fixedly connected to the bottom end of the scraper base plate 2. The angle between each cutter head rocker arm 7 and the scraper base 2 is acute, and each cutter head rocker arm 7 is arranged side by side, with each cutter head rocker arm 7 facing a cutter head spring base 4. A cutter head spring 6 is fixedly connected between the top ends of every two facing cutter head rocker arm 7 and the top end of the cutter head spring base 4.

[0038] For each cutter head rocker arm 7, a blade 9 is connected to the top of the cutter head rocker arm 7. There is a raised portion between the two ends of the cutter head rocker arm 7. The top of the raised portion is connected to a blade 9 through a tool holder 8. The angle between the blade 9 and the cutter head rocker arm 7 is adjustable.

[0039] For example, for each cutter head rocker arm 7, a first bolt hole is provided on the upper end and the raised portion of the cutter head rocker arm 7. The upper end of the cutter head rocker arm 7 is axially connected to the corresponding tool holder 8 via a rocker arm front fixed shaft 13. The raised portion of the cutter head rocker arm 7 is also axially connected to the corresponding tool holder 8 via a rocker arm front fixed shaft 13 (a small bushing 12 can be provided on the outside of each rocker arm front fixed shaft 13). Each tool holder 8 is evenly surrounded by a plurality of second bolt holes centered on the end of the rocker arm front fixed shaft 13. Each second bolt hole of each tool holder 8 can be aligned with the first bolt hole of the corresponding shaft connection portion on the cutter head rocker arm 7, and the tool holder 8 and the cutter head rocker arm 7 are fixed by bolts in an adaptive manner. When different second bolt holes on the tool holder 8 are aligned with the first bolt holes and tightened, the angles between the blade 9 connected to the tool holder 8 and the cutter head rocker arm 7 are different. The number and spacing of the second bolt holes can be set according to the actual blade angle requirements during the cleaning process.

[0040] like Figure 2 As shown, in a possible implementation, the angle between the blade 9 and the cutter head rocker arm 7 can be pre-adjusted before the device is operated to ensure that the blade 9 cuts into the attachments on the inner wall of the tunnel at the most appropriate angle.

[0041] When the device is in operation, the rotary mechanism drives the eccentric wheel 150 to rotate continuously, and drives multiple cutter head rocker arm pieces 7 to move synchronously through the transmission rod 151. The blade 9 located on the raised part of the cutter head rocker arm piece 7 and the blade 9 located on the top of the cutter head rocker arm piece 7 move toward the inner wall of the tunnel in succession. The blade 9 located on the raised part of the cutter head rocker arm piece 7 first contacts the attachments on the inner wall of the tunnel. At this time, the cutter head spring 6 and the tension spring 10 are pre-tightened, so that the blade 9 fits the inner wall of the tunnel in the radial direction and rotates circumferentially to scrape the attachments attached to the outer layer of the inner wall of the tunnel, and then The blade 9 located at the raised part of the cutter head rocker arm piece 7 retracts under the drive of the rocker arm 15, and the blade 9 located at the upper end of the cutter head rocker arm piece 7 then moves toward the inner wall of the tunnel, contacts and scrapes the inner layer of attachments more deeply, and then retracts under the drive of the rocker arm 15. In this way, the rocker arm 15, driven by the rotary mechanism, drives the cutter head rocker arm piece 7 to form a reciprocating hoeing action, and can remove the attachments at different depths in two times, which is conducive to more thorough removal of stubborn attachments, and thereby greatly improves the efficiency of tunnel cleaning.

[0042] Furthermore, when the segmented flexible scraper tunnel cleaning device is unstressed, the blade spring 6 and the folding arm spring 5 are in their natural, uncompressed state. When the blade 9 contacts the wall and continues to push toward it, the blade spring 6 applies a reverse thrust, ensuring a closer contact between the blade 9 and the wall, making it easier to scrape away debris adhering to the outer layer of the tunnel's inner wall.

[0043] If blade 9 encounters an excessively hard object or touches the tunnel wall, it is pushed against the wall, causing blade spring 6 to compress. When blade spring 6 is fully compressed, folding arm adapter plate 1 pushes folding arm spring 5 to further compress. Folding arm spring 5 begins to compress backward, effectively preventing damage to blade 9 and any potential damage to the tunnel wall, ensuring safety and reliability within the radial flexibility adjustment range.

[0044] In a possible implementation, the encoder 18 is mounted on the eccentric wheel 150 via two limiting masks 17 to detect the rotation angle of the scraper.

[0045] The scraper base plate 2 is connected to the folding arm adapter plate 1 through a rotating shaft 14. A bushing 11 is sleeved on the outside of the rotating shaft 14. A plurality of tension springs 10 are connected between the connecting plate 101 and the scraper base plate 2. Each tension spring 10 is connected to the connecting plate 101 and the scraper base plate 2 through a tension spring base 3, thereby realizing the flexibility of the blade head part of the segmented flexible scraper tunnel cleaning device in the left and right directions.

[0046] The six blades 9 are fixed to the six tool holders 8 by bolts. Each upper and lower two blades 9 and the tool holder 8 are fixed by two cutter head rocker arms 7 and the front fixed shaft 13 of the rocker arms, and are fixed to the cutter head spring base 4 by axial bolts and a small bushing 12 at the tail end of the cutter head rocker arm 7.

[0047] The segmented flexible scraper tunnel cleaning device disclosed in the present invention has the following characteristics:

[0048] 1. Adaptability: This ensures that the cutter head always adheres to the tunnel wall during operation. In one application example, the device's radial adaptability is 150 mm, allowing the entire cutter head to swing within a small range, thereby adapting to the irregular shape of the water intake culvert wall to ensure effective cleaning.

[0049] 2. Environmental adaptability: a two-layer cutter head is designed, and the cutting angle can be manually adjusted. The appropriate cutting angle is selected according to the size of different tunnel structures. The main cutter and auxiliary cutter are selected to meet the requirements of pollution cleaning. The cutter head is swung in the axial direction of the tunnel through the tension spring to meet the pollution cleaning needs of bends, etc.

[0050] 3. Safety: two-level safety redundancy design and adaptive adjustment ensure that the cutter head pressure is within a safe range under any working conditions.

[0051] Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0052] While various embodiments of the present disclosure have been described above, the above descriptions are illustrative, non-exhaustive, and not intended to be limiting of the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is selected to best explain the principles of the embodiments, their practical applications, or improvements to existing technologies, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A segmented flexible scraper tunnel cleaning device, characterized in that: The device comprises: a folding arm adapter plate, a scraper bottom plate, a plurality of folding arm springs, a plurality of cutter head springs, a plurality of cutter head rocker arm pieces, a plurality of cutter holders, a plurality of blades, and a rocker arm; The rocker arm includes an eccentric wheel and a transmission rod. The folding arm adapter plate includes an L-shaped protrusion structure and a connecting plate. The axis of the eccentric wheel is connected to the shaft of the rotary mechanism. One end of the transmission rod is fixedly connected to a first position on the edge of the eccentric wheel. The other end of the transmission rod is connected to one end of the protrusion structure through the folding arm rotating shaft. The other end of the protrusion structure is fixedly connected to the connecting plate. One end of each folding arm spring is fixedly connected to a second position on the edge of the eccentric wheel that is different from the first position, and the other end of the folding arm spring is fixedly connected to a position on the protrusion structure between the bend of the protrusion structure and the eccentric wheel; The scraper base plate is opposite to the folding arm adapter plate, and the scraper base plate is connected to the connecting plate shaft of the folding arm adapter plate, the bottom end of each cutter head spring base is fixedly connected to the upper end of the scraper base plate, and each cutter head spring base is arranged in parallel between the head scraper base plate and the folding arm adapter plate, the bottom end of each cutter head rocker arm piece is fixedly connected to the bottom end of the scraper base plate, the angle between each cutter head rocker arm piece and the scraper base plate is an acute angle, and each cutter head rocker arm piece is arranged in parallel, each cutter head rocker arm piece is facing a cutter head spring base, and a cutter head spring is fixedly connected between the upper ends of every two facing cutter head rocker arm pieces and the upper end of the cutter head spring base; For each cutter head rocker arm, the top of the cutter head rocker arm is connected to a blade. There is a raised portion between the two ends of the cutter head rocker arm. The top of the raised portion is connected to a blade through the tool holder. The angle between the blade and the cutter head rocker arm is adjustable.

2. The device according to claim 1, characterized in that For each cutter head rocker arm piece, a first bolt hole is provided on the upper end and the raised portion of the cutter head rocker arm piece, the upper end of the cutter head rocker arm piece and the corresponding tool holder are connected via a front fixed shaft of the rocker arm piece, and the raised portion of the cutter head rocker arm piece and the corresponding tool holder are also connected via a front fixed shaft of the rocker arm piece. A plurality of second bolt holes are evenly surrounded on each tool holder with the front fixed shaft of the rocker arm piece as the center, and each second bolt hole of each tool holder can be aligned with the first bolt hole of the corresponding axis connection part on the cutter head rocker arm piece, and the tool holder and the cutter head rocker arm piece are fixed by adaptively fastening with bolts. When different second bolt holes on the tool holder are aligned with the first bolt holes and fastened, the angles between the blade connected to the tool holder and the cutter head rocker arm piece are different.

3. The device according to claim 1, characterized in that When the eccentric wheel is driven by the rotary mechanism to rotate, the multiple cutter head rocker plates are driven to move synchronously through the transmission rod. The blade located on the raised part of the cutter head rocker plate first moves toward the inner wall of the tunnel, scraping off the attachments attached to the outer layer of the inner wall of the tunnel, and then retracts under the drive of the rocker arm; During the retraction of the blade located at the raised portion of the cutter head rocker arm, the blade located at the upper end of the cutter head rocker arm moves toward the inner wall of the tunnel, scrapes the inner layer of attachments more deeply, and then retracts under the drive of the rocker arm.

4. The device according to claim 1, characterized in that When the segmented flexible scraper tunnel cleaning device is not under stress, the cutter head spring and the folding arm spring are in an uncompressed state; When the cutter head contacts the wall and continues to push toward the wall, the cutter head spring gives the cutter head a reverse thrust, making the cutter head contact the wall more closely; When the cutter head encounters an overly hard attachment or touches the inner wall of the tunnel, the cutter head is pushed toward the wall, causing the cutter head spring to compress. When the cutter head spring is fully compressed, the folding arm adapter plate pushes the folding arm spring to compress, and the folding arm spring begins to compress backward.

5. The device according to claim 1, characterized in that The encoder is installed on the eccentric wheel through a limit mask to detect the rotation angle of the scraper.

6. The device according to claim 1, characterized in that The scraper base plate is connected to the folding arm adapter plate through a rotating shaft and a bushing. A plurality of tension springs are connected between the connecting plate and the scraper base plate. Each tension spring is connected to the connecting plate and the scraper base plate respectively through a tension spring base.

7. The device according to claim 1, characterized in that The folding arm spring and the cutter head spring are nitrogen springs.

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