A reamer type hidden culvert combined pier platform open channel trash device and control method thereof

Abstract

The present application relates to the technical field of ocean engineering, and more particularly to a reamer type hidden culvert combined pier platform open channel trash device and control method thereof, the trash device comprising: a water intake head, a hidden culvert water intake tunnel, a water intake open channel and a water intake forebay, one end of the hidden culvert water intake tunnel and the water intake head being connected to each other, the other end of the hidden culvert water intake tunnel and the water intake open channel being communicated with each other, the water intake forebay and the water intake open channel being communicated with each other, and a plurality of cold source water intake pipelines being installed in the water intake forebay; the water intake head and the hidden culvert water intake tunnel being arranged in an outer sea tunnel, a water intake head base being installed at the bottom of the water intake head, and a front-end trash mechanism being arranged inside the water intake head; the front-end trash mechanism comprising a reamer and a transmission mechanism. The present application is provided with a reamer inside the water intake head, and marine organisms that may cause a risk of blockage are cut into scattered blocks by rotating the reamer, so that they do not gather in front of the open channel trash screen, thereby solving the problem of culvert marine organism blockage in the prior art and ensuring the safety of cold source water.

Description

Technical Field

[0001] This invention relates to the field of marine engineering technology, and in particular to a debris interception device and its control method for a culvert-type underground culvert combined with an open channel. Background Technology

[0002] In recent years, with the commissioning of several coastal nuclear power plants in China, incidents of pollutants such as aquatic plants, garbage, and marine organisms clogging the air intake screens have occurred in operating nuclear power units. These blockages have frequently disrupted the safe and stable operation of the units, leading to serious consequences such as unplanned shutdowns and reactor shutdowns. Cooling source safety has gradually become a major concern. On the other hand, the country is placing increasing emphasis on marine ecological environment protection and continuously promoting the healthy development of marine ecosystems, thus placing higher demands on the environmental friendliness of nuclear power plant water intakes. Therefore, some nuclear power plants have adopted covert water intake methods.

[0003] However, the characteristics of marine organism blockage in the intake of the underground culvert are not yet clear, and there are no effective treatment devices or methods to alleviate the blockage of cold source water in the project.

[0004] Therefore, there is a need for a debris interception device and its control method for a culvert-type underground culvert combined with an open channel and abutment that can solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a debris interception device and its control method for a culvert combined with an open channel and a pier. The invention has a reamer installed in the water intake head, which can cut marine organisms that may cause blockage into scattered pieces by rotating the reamer, so that they do not accumulate in front of the debris interception net of the open channel. This solves the problem of marine organism blockage in culverts in the existing technology and ensures the safety of cold source water.

[0006] The technical solution adopted by the present invention to solve the above-mentioned technical problems is: a debris interception device for a culvert combined with an open channel, comprising: a water intake head, a culvert water intake tunnel, an open channel, and a water intake forebay. One end of the culvert water intake tunnel is connected to the water intake head, and the other end of the culvert water intake tunnel is connected to the open channel. The water intake forebay is connected to the open channel, and multiple cold source water intake pipes are installed in the water intake forebay.

[0007] Both the water intake head and the underground water intake tunnel are located inside the offshore tunnel. A water intake head base is installed at the bottom of the water intake head, and a front-end debris-blocking mechanism is installed inside the water intake head.

[0008] The front-end debris-blocking mechanism includes a reamer and a transmission mechanism. The transmission mechanism includes a transmission shaft A, a transmission shaft B, a transmission shaft C, and a drive motor. The transmission shafts A, B, and C are coaxially connected, and the output end of the drive motor is mutually driven by the transmission shaft C.

[0009] The reamer includes a first-stage blade, a second-stage blade, and a third-stage blade. The first-stage blade is fixedly connected to the drive shaft A, the second-stage blade is fixedly connected to the drive shaft B, and the third-stage blade is fixedly connected to the drive shaft C.

[0010] Both the water intake channel and the water intake forebay are located inside the waterway of the water intake channel. The water intake channel and the water intake forebay are connected as a single unit. A rear-end debris-blocking mechanism is installed between the water intake channel and the water intake forebay.

[0011] The rear-end debris-blocking mechanism includes a lifting platform and a debris-blocking net. There are two debris-blocking nets, which are arranged parallel to each other. The lifting platform is located between the two debris-blocking nets and is connected to the debris-blocking net.

[0012] The lifting platform includes a primary lifting thread, a secondary lifting thread, a connecting pipe, a fixed platform, a primary lifting ring, and a secondary lifting ring. The fixed platform is located at the bottom of the secondary lifting thread, and the fixed platform and the secondary lifting thread are connected by a thread. Multiple debris net hanging points are connected to the outside of the connecting pipe, and the connecting pipe is connected to the debris net through the multiple debris net hanging points.

[0013] Both the primary lifting thread and the secondary lifting thread are rotatably connected to the lifting platform. The primary lifting thread is threaded to the primary lifting ring, and the secondary lifting thread is threaded to the secondary lifting ring.

[0014] A sonar jammer, a sonar detector, and a Doppler flow velocity sensor are fixedly connected to the water intake head base.

[0015] A water level gauge is installed inside the water intake pool, and an ocean level gauge is installed inside the offshore tunnel.

[0016] Furthermore, the first-stage, second-stage, and third-stage blades are all mesh structures used to cut blockages, increase water flow rate, and block pollutants. The first-stage blade has multiple through holes with a diameter of 5cm, the second-stage blade has multiple through holes with a diameter of 1cm, and the third-stage blade has multiple through holes with a diameter of 5mm.

[0017] A control method for a debris interception device in a culvert-type underground culvert combined with an open channel with piers includes the following steps:

[0018] Step S1: Seawater is drawn from the offshore tunnel through the intake head and introduced into the open intake channel through the culvert tunnel;

[0019] Step S2: During the water intake process, when marine organisms in the seawater block the water intake head, there is a water level difference between the seawater in the outer sea tunnel and the seawater in the pre-intake pool. When the water level difference is greater than 0.3m, the reamer is started by driving the motor to cut the marine organisms in the seawater.

[0020] Furthermore, in step S2, when the water level difference between the seawater in the offshore tunnel and the seawater in the pre-intake pool is less than 0.1m, water is normally taken out through the water intake head. When the water level difference between the seawater in the offshore tunnel and the seawater in the pre-intake pool is greater than 0.1m and less than 0.3m, it is determined that there is a slight blockage in the water intake head. The drive motor drives the transmission shaft C to rotate, so that the three-stage blades rotate at a speed of 1000rpm.

[0021] Furthermore, during the water intake process, sonar detectors identify approaching marine organisms. When the size of an approaching marine organism is greater than 5cm, the drive motor drives transmission shafts A, B, and C to rotate, causing the first-stage, second-stage, and third-stage blades to rotate simultaneously at a speed of 1000rpm. At the same time, a sonar jammer emits low-frequency sonar interference to drive away the marine organism. When the size of a marine organism is less than 5cm, the drive motor drives transmission shafts B and C to rotate, causing the second-stage and third-stage blades to rotate at a speed of 1000rpm.

[0022] Furthermore, when the sonar detector detects marine organisms with a volume greater than 5 mm and less than 1 cm, the drive motor drives the transmission shaft C to rotate, causing the third-stage blades to rotate at a speed of 1000 rpm.

[0023] Furthermore, in step S2, when the water level difference between the seawater in the offshore tunnel and the seawater in the intake pool is greater than 0.3m and less than 0.5m, the drive motor drives the transmission shaft B and transmission shaft C to rotate, so that the second-stage blades and the third-stage blades rotate at a speed of 1000rpm.

[0024] Furthermore, in step S2, when the water level difference between the seawater in the offshore tunnel and the seawater in the intake pool is greater than 0.5m, the drive motor drives the transmission shafts A, B and C to rotate, so that the first-stage blades, second-stage blades and third-stage blades rotate simultaneously at a speed of 1000rpm.

[0025] Furthermore, when it is necessary to increase the water intake, or when the water level difference between the seawater in the offshore tunnel and the seawater in the intake pool is greater than 0.5m, the rotation speed of the first-stage, second-stage, and third-stage blades is adjusted to 2000rpm to actively increase the water intake capacity.

[0026] The advantages of this invention are as follows: This invention provides a debris interception device and its control method for a culvert-type combined with an open channel with piers, which has the following technical effects:

[0027] 1. The debris-blocking device, through the rotation of the reamer, can cut marine organisms in seawater and clear open channels, not only preventing blockages but also ensuring a normal water supply. The primary, secondary, and tertiary blades of the reamer in this invention adopt a mesh structure, which not only cuts marine organisms and blockages but also blocks pollutants, effectively improving cleaning efficiency. This invention has multiple 5cm diameter through holes on the primary blade, multiple 1cm diameter through holes on the secondary blade, and multiple 5mm diameter through holes on the tertiary blade. Different sizes of marine organisms can be cut through the blades of different specifications, while also increasing the water intake flow rate.

[0028] 2. This invention can achieve intelligent control, and can automatically adjust the rotation speed of the cutter according to the water level difference between the seawater in the offshore tunnel and the seawater in the pre-intake pool, so as to achieve different levels of cleaning and water intake capacity, and increase the water intake when needed.

[0029] In summary, this automatic cleaning device and control method for open channels enables automatic cleaning, efficient cleaning, pollutant blocking, and intelligent control, improving the efficiency of open channel cleaning, ensuring normal water supply, and effectively alleviating the problem of cold source water blockage. Attached Figure Description

[0030] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the structure of the present invention;

[0032] Figure 2 This is an enlarged structural schematic diagram of the reamer in this invention;

[0033] Figure 3 This is an enlarged structural schematic diagram of the water intake head base in this invention;

[0034] Figure 4 This is a schematic diagram of the rear-end debris-blocking mechanism in this invention;

[0035] Figure 5 This is an enlarged structural schematic diagram of the debris-blocking pier in this invention;

[0036] in:

[0037] 1012, Primary blade; 1013, Through Hole A; 1014, Secondary blades; 1015, Through Hole B; 1016, Third-stage blades; 1017, Through Hole C; 1018. Drive shaft B; 1019. Drive shaft C; 102. Drive motor; 103. Water intake base; 1031. Sonar jammer; 1032. Sonar detector; 1033. Doppler flow velocity sensor; 2. Culvert water intake tunnel; 3. Open water intake channel; 4. Back-end pollution interception mechanism; 401. Debris containment platform; 402. Trash netting; 4011, First-class lifting thread 4012, Secondary Lifting Thread 4013, Flexible connection module; 4014. Trash Net Hanging Point 4015. Fixed piers 4016, Level 1 Lifting Ring 4017, Two-stage lifting ring 5. Water intake pool; 6. Cold source water intake pipe; 7. Water level gauge for the intake pool; 8. Sea level gauge. Detailed Implementation

[0038] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "installed," "connected," and "linked" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0040] Example 1:

[0041] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 2 This is an enlarged structural schematic diagram of the reamer in this invention. Figure 3 This is an enlarged structural diagram of the water intake head base in this invention. Figure 4 This is a schematic diagram of the rear-end debris-blocking mechanism in this invention. Figure 5 This is an enlarged structural schematic diagram of the debris-blocking pier in this invention, as shown below. Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5The invention discloses a debris interception device and its control method for a culvert-type underground culvert combined with an open channel, comprising: a water intake head 1, a culvert water intake tunnel 2, an open channel 3, and a pre-intake pool 5. One end of the culvert water intake tunnel 2 is connected to the water intake head 1, and the other end of the culvert water intake tunnel 2 is connected to the open channel 3. The pre-intake pool 5 is connected to the open channel 3. Multiple cold source water intake pipes 6 are installed in the pre-intake pool 5. In this invention, both the water intake head 1 and the culvert water intake tunnel 2 are located inside an offshore tunnel. A water intake head 1 base is installed at the bottom of the water intake head 1. A sonar jammer 1031, a sonar detector 1032, and a Doppler flow velocity sensor 1033 are fixedly connected to the base of the water head 1. A front-end debris-blocking mechanism is set inside the water head 1. The front-end debris-blocking mechanism includes a reamer 101 and a transmission mechanism. The transmission mechanism includes a transmission shaft A1011, a transmission shaft B1018, a transmission shaft C1019, and a drive motor 102. The transmission shafts A1011, B1018, and C1019 are coaxially connected. The output end of the drive motor 102 is mutually driven by the transmission shaft C1019.

[0042] The reamer 101 in this invention includes a primary blade 1012, a secondary blade 1014, and a tertiary blade 1016. The primary blade 1012 is fixedly connected to the drive shaft A1011, the secondary blade 1014 is fixedly connected to the drive shaft B1018, and the tertiary blade 1016 is fixedly connected to the drive shaft C1019. All three blades (1012, 1014, and 1016) have a mesh structure, used for cutting blockages, increasing water flow rate, and blocking contaminants. The dyeing material has multiple through holes with a diameter of 5cm on the first-stage blade 1012, which can cut large jellyfish, sea fish and other marine organisms. The second-stage blade 1014 has multiple through holes with a diameter of 1cm, which can cut medium-sized fish and shrimp. The third-stage blade 101 has multiple through holes with a diameter of 5mm, which can cut small fish and shrimp. The pitch between the first-stage blade 1012, the second-stage blade 1014 and the third-stage blade 1016 in this invention is 0.3m, and the rated water intake flow rate is 5m / s.

[0043] In this invention, both the open intake channel 3 and the pre-intake pool 5 are located inside the open channel waterway. The open intake channel 3 and the pre-intake pool 5 are integrally connected. A rear-end debris-blocking mechanism 4 is installed between the open intake channel 3 and the pre-intake pool 5. The rear-end debris-blocking mechanism 4 includes a lifting platform 401 and a debris-blocking net 402. Two debris-blocking nets 402 are provided and arranged parallel to each other. The lifting platform 401 is located between the two debris-blocking nets 402 and is hooked to the debris-blocking nets 402. The lifting platform 401 includes a primary lifting thread 4011 and a secondary lifting thread 4011. The system includes a threaded lowering thread 4012, a connecting pipe 4013, a fixed support 4015, a primary lifting ring 4016, and a secondary lifting ring 4017. The fixed support 4015 is located at the bottom of the secondary lifting thread 4012, and the fixed support 4015 and the secondary lifting thread 4012 are threadedly connected. Multiple debris-blocking net hanging points 4014 are connected to the outside of the connecting pipe 4013. The connecting pipe 4013 is made of rubber and is interconnected with the debris-blocking net 402 through the multiple debris-blocking net hanging points 4014. Both the primary lifting thread 4011 and the secondary lifting thread 4012 are rotatably connected to the lifting... On the pier 401, the primary lifting thread 4011 and the primary lifting ring 4016 are threadedly connected, with a thread pitch of 5cm. Similarly, the secondary lifting thread 4012 and the secondary lifting ring 4017 are threadedly connected, with a thread pitch of 3cm. The invention includes a drive motor (not shown in the figure) inside the fixed pier 4015 that can automatically raise and lower the debris-blocking pier 401, enabling better performance of the debris-blocking net 402 under different water levels. With its effective interception of debris and relatively low structural stress, when the water level in the intake channel 3 rises and the distance to the highest debris-blocking net hanging point 4014 is less than 1m, the primary lifting thread 4011 is rotated clockwise to raise the primary lifting ring 4016 and the secondary lifting ring 4017, thus better intercepting surface marine organisms. When the water level in the intake channel drops and the distance to the highest debris-blocking net hanging point 4014 is greater than 2m, the primary lifting thread 4011 is rotated counterclockwise under the drive of the motor, thus lowering the primary lifting ring 4016 and the secondary lifting ring 4017. This effectively reduces the tensile force on the debris-blocking net hanging point 4014 and ensures structural strength.

[0044] The present invention has installed a water level gauge 7 inside the water intake pool 5 and an offshore water level gauge 8 inside the offshore tunnel, which can monitor the water level of the water intake pool 5 and the offshore tunnel in real time.

[0045] The present invention also provides a control method for a debris interception device in a culvert-type underground culvert combined with an open channel, comprising the following steps:

[0046] Step S1: Seawater is drawn from the offshore tunnel through the water intake head 1, and the seawater is introduced into the water intake channel 3 through the culvert tunnel;

[0047] Step S2: During the water intake process of intake head 1, when marine organisms in the seawater block intake head 1, there is a water level difference between the seawater in the outer sea tunnel and the seawater in the intake pool 5. When the water level difference is greater than 0.3m, the reamer 101 is started by the drive motor 102 to cut the marine organisms in the seawater. When the water level difference between the seawater in the outer sea tunnel and the seawater in the intake pool 5 is less than 0.1m, water is taken normally through intake head 1. When the water level difference between the seawater in the outer sea tunnel and the seawater in the intake pool 5 is greater than 0.1m and less than 0.3m, it is determined that intake head 1 is slightly blocked. The drive motor 102 drives the transmission shaft C1019 to rotate, so that the third-stage blade 1016 rotates at a speed of 1000rpm.

[0048] During the water intake process of intake head 1, sonar detector 1032 identifies approaching marine organisms. When the size of the approaching marine organism is greater than 5cm, drive motor 102 drives transmission shafts A1011, B1018, and C1019 to rotate, causing the first-stage blade 1012, second-stage blade 1014, and third-stage blade 1016 to rotate simultaneously at a speed of 1000rpm. At the same time, sonar jammer 1031 emits low-frequency sonar interference to drive away the marine organism. When the size of the marine organism is less than 5cm, drive motor 102 drives transmission shafts B1018 and C1019 to rotate, causing the second-stage blade 1014 and third-stage blade 1016 to rotate at a speed of 1000rpm. When sonar detector 1032 detects a marine organism with a size greater than 5mm and less than 1cm, drive motor 102 drives transmission shaft C1019 to rotate, causing the third-stage blade 1016 to rotate at a speed of 1000rpm.

[0049] In step S2, when the water level difference between the seawater in the offshore tunnel and the seawater in the intake pool 5 is greater than 0.3m and less than 0.5m, the drive motor 102 drives the transmission shafts B1018 and C1019 to rotate, causing the second-stage blades 1014 and tertiary blades 1016 to rotate at a speed of 1000rpm; when the water level difference between the seawater in the offshore tunnel and the seawater in the intake pool 5 is greater than 0.5m, the drive motor 102 drives the transmission shaft A101... 1. Drive shafts B1018 and C1019 rotate, causing the first-stage blade 1012, second-stage blade 1014, and third-stage blade 1016 to rotate simultaneously at a speed of 1000 rpm. When it is necessary to increase the water intake, or when the water level difference between the seawater in the offshore tunnel and the seawater in the intake pool 5 is greater than 0.5 m, the speed of the first-stage blade 1012, second-stage blade 1014, and third-stage blade 1016 is adjusted to 2000 rpm to actively increase the water intake capacity.

[0050] Working Principle: During operation, this invention draws water from the intake head 1, introducing seawater into the inland open intake channel 3 through a culvert tunnel. The seawater passes through the debris barrier 402 into the intake pool 5, and is then drawn away for utilization through the cold source intake pipe 6. Under normal operating conditions, the reamer 101 does not rotate. When marine organisms block the intake head 1, a difference in water level between the inside and outside is created. When the water level difference exceeds 0.3m, the reamer 101 is activated. When the water level difference exceeds 0.5m, the rotation speed of the reamer 101 is increased to actively increase the water intake capacity. Alternatively, the sonar detector 1032 detects approaching marine organisms. When the marine organism is larger than 5cm, the reamer 101 is activated, and simultaneously, the sonar jammer 1031 emits low-frequency sonar interference to drive away the marine organism.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do 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 debris interception device for a culvert combined with an open channel and pier, comprising: Water intake head (1), culvert water intake tunnel (2), water intake open channel (3) and water intake forebay (5), one end of the culvert water intake tunnel (2) is connected to the water intake head (1), the other end of the culvert water intake tunnel (2) is connected to the water intake open channel (3), the water intake forebay (5) is connected to the water intake open channel (3), and multiple cold source water intake pipes (6) are installed in the water intake forebay (5). The feature is that the water intake head (1) and the underground water intake tunnel (2) are both set inside the offshore tunnel, a water intake head (1) base is installed at the bottom of the water intake head (1), and a front-end debris blocking mechanism is set inside the water intake head (1). The front-end debris-blocking mechanism includes a reamer (101) and a transmission mechanism. The transmission mechanism includes a transmission shaft A (1011), a transmission shaft B (1018), a transmission shaft C (1019), and a drive motor (102). The transmission shafts A (1011), B (1018), and C (1019) are coaxially connected. The output end of the drive motor (102) is mutually driven by the transmission shaft C (1019). The reamer (101) includes a first-stage blade (1012), a second-stage blade (1014), and a third-stage blade (1016). The first-stage blade (1012) is fixedly connected to the drive shaft A (1011), the second-stage blade (1014) is fixedly connected to the drive shaft B (1018), and the third-stage blade (1016) is fixedly connected to the drive shaft C (1019). The water intake channel (3) and the water intake pool (5) are both located inside the waterway. The water intake channel (3) and the water intake pool (5) are connected as a whole. A rear-end debris interception mechanism (4) is installed between the water intake channel (3) and the water intake pool (5). The rear-end debris-blocking mechanism (4) includes a lifting platform (401) and a debris-blocking net (402). There are two debris-blocking nets (402), which are arranged parallel to each other. The lifting platform (401) is arranged between the two debris-blocking nets (402), and the lifting platform (401) and the debris-blocking net (402) are connected to each other. The lifting platform (401) includes a primary lifting thread (4011), a secondary lifting thread (4012), a connecting pipe (4013), a fixed platform (4015), a primary lifting ring (4016), and a secondary lifting ring (4017). The fixed platform (4015) is located at the bottom of the secondary lifting thread (4012), and the fixed platform (4015) and the secondary lifting thread (4012) are connected by threads. Multiple debris screen hanging points (4014) are connected to the outside of the connecting pipe (4013), and the connecting pipe (4013) is connected to the debris screen (402) through the multiple debris screen hanging points (4014). The primary lifting thread (4011) and the secondary lifting thread (4012) are both rotatably connected to the lifting platform (401). The primary lifting thread (4011) is threaded to the primary lifting ring (4016), and the secondary lifting thread (4012) is threaded to the secondary lifting ring (4017). A sonar jammer (1031), a sonar detector (1032), and a Doppler flow velocity sensor (1033) are fixedly connected to the base of the water intake head (1). The water intake pool (5) is equipped with a water intake pool level gauge (7), and the offshore water level gauge (8) is installed inside the offshore tunnel.

2. The debris interception device for a culvert combined with an open channel and pier as described in claim 1, characterized in that, The first-stage blade (1012), second-stage blade (1014), and third-stage blade (1016) are all mesh structures used to cut blockages, increase water flow rate, and block pollutants. Multiple through holes with a diameter of 5cm are opened on the first-stage blade (1012), multiple through holes with a diameter of 1cm are opened on the second-stage blade (1014), and multiple through holes with a diameter of 5mm are opened on the third-stage blade (1016).

3. A control method for a debris interception device based on the hinged culvert combined with an open channel with piers as described in claim 1, characterized in that, Includes the following steps: Step S1: Seawater is drawn from the offshore tunnel through the intake head (1), and the seawater is introduced into the intake channel (3) through the culvert tunnel; Step S2: During the water intake process of the water intake head (1), when the marine organisms in the seawater block the water intake head (1), there is a water level difference between the seawater in the outer sea tunnel and the seawater in the water intake pool (5). When the water level difference is greater than 0.3m, the reamer (101) is started by the drive motor (102) and the marine organisms in the seawater are cut by the reamer (101).

4. The control method according to claim 3, characterized in that, In step S2, when the water level difference between the seawater in the offshore tunnel and the seawater in the intake pool (5) is less than 0.1m, water is normally taken out through the intake head (1). When the water level difference between the seawater in the offshore tunnel and the seawater in the intake pool (5) is greater than 0.1m and less than 0.3m, it is determined that the intake head (1) is slightly blocked. The drive motor (102) drives the transmission shaft C (1019) to rotate, so that the third-stage blade (1016) rotates at a speed of 1000rpm.

5. The control method according to claim 3, characterized in that, During the water intake process of the water intake head (1), the sonar detector (1032) identifies the approaching marine organisms. When the size of the approaching marine organism is greater than 5cm, the drive motor (102) drives the transmission shaft A (1011), transmission shaft B (1018) and transmission shaft C (1019) to rotate, so that the first-stage blade (1012), second-stage blade (1014) and third-stage blade (1016) rotate at a speed of 1000rpm. At the same time, the sonar jammer (1031) emits low-frequency sonar interference to drive away the marine organisms. When the size of the marine organism is less than 5cm, the drive motor (102) drives the transmission shaft B (1018) and transmission shaft C (1019) to rotate, so that the second-stage blade (1014) and third-stage blade (1016) rotate at a speed of 1000rpm.

6. The control method according to claim 5, characterized in that, When the sonar detector (1032) detects a marine organism with a volume greater than 5 mm and less than 1 cm, the drive motor (102) drives the transmission shaft C (1019) to rotate, causing the third-stage blade (1016) to rotate at a speed of 1000 rpm.

7. The control method according to claim 3, characterized in that, In step S2, when the water level difference between the seawater in the offshore tunnel and the seawater in the intake pool (5) is greater than 0.3m and less than 0.5m, the drive motor (102) drives the transmission shaft B (1018) and the transmission shaft C (1019) to rotate, so that the secondary blade (1014) and the tertiary blade (1016) rotate at a speed of 1000rpm.

8. The control method according to claim 3, characterized in that, In step S2, when the water level difference between the seawater in the offshore tunnel and the seawater in the intake pool (5) is greater than 0.5m, the drive motor (102) drives the transmission shaft A (1011), transmission shaft B (1018) and transmission shaft C (1019) to rotate, so that the first-stage blade (1012), the second-stage blade (1014) and the third-stage blade (1016) rotate simultaneously at a speed of 1000rpm.

9. The control method according to any one of claims 3 to 8, characterized in that, When it is necessary to increase the water intake, or when the water level difference between the seawater in the offshore tunnel and the seawater in the intake pool (5) is greater than 0.5m, the rotation speed of the first-stage blade (1012), the second-stage blade (1014) and the third-stage blade (1016) is adjusted to 2000rpm to actively increase the water intake capacity.

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