CN219386246U - Trash device and nuclear power station cold source system - Google Patents

Abstract

The utility model discloses a trash rack device, comprising: the device comprises a floating barrel array and a multi-stage dirt blocking net, wherein the floating barrel array and the multi-stage dirt blocking net are arranged in a water taking open channel, the floating barrel array is positioned at the upstream of the multi-stage dirt blocking net, extends along the width direction of the water taking open channel and is used for intercepting plugs floating on the water surface of the water taking open channel, the dirt blocking net extends along the width direction of the water taking open channel, and the water inlet depth of the multi-stage dirt blocking net is sequentially increased along the water flow direction, so that the interception area of the dirt blocking net positioned at the downstream is larger than that of the dirt blocking net positioned at the upstream, and the plugs in the water can be blocked in a grading manner. The trash rack can effectively stage and intercept blocking objects in water, and damage to the trash rack caused by too concentrated blocking objects is avoided. The utility model also discloses a cold source system of the nuclear power station comprising the trash rack device.

Description

Trash device and nuclear power station cold source system

Technical Field

The utility model particularly relates to a trash rack device and a cold source system of a nuclear power station comprising the trash rack device.

Background

Cold source systems in nuclear power plants require the extraction of seawater as a cooling fluid from coastal waters. However, in recent years, the occurrence of sudden marine organisms or foreign matters blocking the water intake operation of a nuclear power plant in coastal areas frequently causes the loss of a cold source of the power plant, and affects the safe and stable operation of the nuclear power. The physical interception in the open water channel of the nuclear power station can effectively reduce the threat of cold source plugs to water taking safety, and can also play a positive role in marine organism diversity and biological resource protection.

However, in the related art, the physical interception in the water intake open channel is usually performed by only one dirt blocking net, the arrangement of the dirt blocking net is not standardized or theoretical guidance, and when the dirt blocking net reaches a certain amount, the dirt easily blocks the dirt blocking net, so that the two sides of the dirt blocking net are damaged after water level difference is generated, and a large amount of dirt flows into equipment such as a blocking drum net in the nuclear power station, so that a cold source of the nuclear power station is invalid.

Disclosure of Invention

The utility model aims to solve the technical problems in the prior art and provides a trash rack and a cold source system of a nuclear power station, wherein the trash rack can effectively stage and intercept blocking objects in water, and the blocking objects are prevented from being too concentrated to cause damage to a trash blocking net.

According to an embodiment of the first aspect of the present utility model, there is provided a trash rack comprising: the device comprises a floating barrel array and a multi-stage dirt blocking net, wherein the floating barrel array and the multi-stage dirt blocking net are arranged in a water taking open channel, the floating barrel array is positioned at the multi-stage upstream of the dirt blocking net, the floating barrel array extends along the width direction of the water taking open channel and is used for intercepting plugs floating on the water surface of the water taking open channel, the dirt blocking net extends along the width direction of the water taking open channel, and the water inlet depth of the multi-stage dirt blocking net sequentially increases along the water flow direction, so that the interception area of the dirt blocking net positioned at the downstream is larger than that of the dirt blocking net positioned at the upstream, and the plugs in the water can be intercepted in a grading manner.

Preferably, the sewage blocking net comprises a first sewage blocking net, a second sewage blocking net and a third sewage blocking net, wherein the first sewage blocking net, the second sewage blocking net and the third sewage blocking net are arranged at intervals along the water flow direction in the water intake open channel, the first sewage blocking net, the second sewage blocking net and the third sewage blocking net extend along the width direction of the water intake open channel, the water inlet depth of the first sewage blocking net is 3-5m, the water inlet depth of the second sewage blocking net is 5-6m, and the water inlet depth of the third sewage blocking net extends from the water surface of the water intake open channel to the bottom of the water intake open channel.

Preferably, the widths of the first dirt blocking net, the second dirt blocking net (3) and the third dirt blocking net (4) are consistent with the width of the water taking open channel, the mesh aperture of the first dirt blocking net is 8-10cm, the mesh aperture of the second dirt blocking net is 2-3cm, and the mesh aperture of the third dirt blocking net is 0.5-1cm.

Preferably, the sewage blocking net further comprises a fourth sewage blocking net, the fourth sewage blocking net is located at the downstream of the third sewage blocking net, the width of the fourth sewage blocking net is also consistent with the width of the water intake open channel, and the water inlet depth of the fourth sewage blocking net extends from the water surface of the water intake open channel to the bottom of the water intake open channel.

Preferably, the first, second and third sewage-blocking nets are all made of ultra-high molecular weight polyethylene fiber material, and the fourth sewage-blocking net is made of stainless steel material.

Preferably, the device further comprises a guide plate, wherein the guide plate is fixedly arranged at the bottom of the water taking open channel and is positioned between the floating cylinder array and the first dirt blocking net, the guide plate is U-shaped, and the U-shaped opening of the guide plate faces the downstream of the water taking open channel and is used for shunting the blocking object moving along the water flow direction and being at the water bottom to two sides.

Preferably, the floating barrel array is U-shaped, and the opening of the floating barrel array faces the downstream of the water intake open channel and is used for diverting the blocking objects moving along the water flow direction and floating on the water surface to two sides, the floating barrel array further comprises a plurality of anchor blocks, the anchor blocks are fixedly arranged at the bottom of the water intake open channel, the anchor blocks are positioned below the floating barrel and correspond to the floating barrels one by one, and the anchor blocks are connected with the floating barrels through ropes so as to position the floating barrels.

Preferably, the floating barrel is made of LLDPE polyethylene material, the anchoring point is made of concrete material, and the flexible connecting piece is a steel wire rope.

Preferably, the floating barrel array is U-shaped, and the U-shaped opening of the floating barrel array faces the downstream of the water intake open channel and is used for shunting the plugs moving along the water flow direction and floating on the water surface to two sides, the device further comprises an anchor block array, the anchor block array comprises a plurality of anchor blocks, the anchor blocks are fixedly arranged at the bottom of the water intake open channel, the anchor block array is also U-shaped, the U-shaped opening of the anchor block array faces the downstream, the anchor blocks are located below the floating barrel, the anchor blocks are in one-to-one correspondence with the floating barrels, and the anchor blocks are connected with the floating barrels through ropes so as to position the floating barrels.

According to an embodiment of the second aspect of the present utility model, there is provided a cold source system of a nuclear power plant, including an open water intake channel for communicating an external water source with a water intake and guiding a water flow in the external water source into the water intake, and a trash device disposed in the open water intake channel for blocking a blockage in the water flow.

Preferably, the water intake open channel is S-shaped, and both sides of the water intake open channel are provided with anti-collision dykes.

The trash device provided by the utility model realizes the function of blocking the blockage in water in a grading way by arranging the floating cylinder array and the multi-stage trash screen. Specifically, the array of floating cylinders floats on the water surface, and can intercept plugs floating on the water surface. The water inlet depth of the multi-stage interception net is sequentially increased along the water flow direction and is respectively used for intercepting the blocking objects in different water depths, so that blocking and even damage of the dirt blocking net caused by that the blocking objects in water are concentrated on one dirt blocking net can be avoided. Therefore, the trash rack can effectively stage and intercept the blocking objects in water, and prevent the blocking objects from being too concentrated to cause damage to the trash rack.

Drawings

Fig. 1 is a schematic view of a trash rack according to some embodiments of the present utility model;

FIG. 2a is a schematic illustration of the connection of a horizontal buoy to anchor blocks in some embodiments of the utility model;

FIG. 2b is a schematic illustration of the connection of a vertical buoy to an anchor block in some embodiments of the present utility model;

figure 3 is a top view of a trash rack in accordance with some embodiments of the present utility model.

In the figure: 1-floating cylinder array, 11-floating pontoon, 12-anchor block, 2-first dirt blocking net, 3-second dirt blocking net, 4-third dirt blocking net, 5-fourth dirt blocking net, 6-guide plate, 7-water intake open channel, 8-anti-collision lifting and 9-water intake.

Detailed Description

The following description of the embodiments of the present utility model will be made more apparent, and the embodiments described in detail, but not necessarily all, in connection with the accompanying drawings. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to fall within the scope of the utility model.

In the description of the present utility model, it should be noted that, the terms "upstream," "downstream," and the like indicate an orientation or a positional relationship based on the orientation or the positional relationship shown in the drawings, and are merely for convenience and simplicity of description, and do not indicate or imply that the apparatus or element in question must be provided with a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "connected," "configured," "mounted," "secured," and the like are to be construed broadly and may be either fixedly connected or detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those skilled in the art according to the specific circumstances.

Example 1

Referring to fig. 1 and 3, the utility model discloses a sewage blocking net, which comprises a floating pontoon array 1 and a multi-stage sewage blocking net.

Wherein, the floating barrel array 1 and the multi-stage dirt blocking net are both arranged in the water intake open channel 7, and the floating barrel array 1 is positioned at the upstream of the multi-stage dirt blocking net. The floating barrel array extends along the width direction of the water intake open channel 7 and is used for intercepting plugs floating on the water surface of the water intake open channel, such as floating plugs of sea floating garbage, remains of cultivation facilities, gulfweed, pinus longus and the like.

Specifically, the floating barrel array 1 includes a plurality of floating barrels 11 and two anchor points (not shown in the figure) which are disposed opposite to each other in the width direction of the water intake open channel 7, and are respectively installed on both banks of the water intake open channel 7. The anchor points are made of concrete material. The float tanks are arranged along the width direction of the water intake open channel 7, and the flexible connecting piece sequentially penetrates through the float tanks so as to connect the float tanks 11 in series. Two ends of the flexible connecting piece are respectively connected with the two anchoring points and used for limiting the floating barrel array 1. The flexible connecting piece is a steel wire rope. Of course, it will be appreciated that the flexible connection unit may also be made of other materials, such as: aramid ropes with better wear resistance, and the like.

Further, as shown in fig. 2a, the floating cylinder 11 is a horizontal floating cylinder, is made of LLDPE polyethylene material, can float on the water surface, and has a water penetration depth of 0.3-0.5m. Thus, the array of floating cylinders 1 is able to effectively intercept plugs floating on the water surface. Of course, as shown in fig. 2b, the floating cylinder 11 may also be a vertical floating cylinder.

After a period of use, the upstream side of the floating barrel array 1 inevitably accumulates a large amount of floating garbage, and requires periodic cleaning by workers to avoid environmental pollution and water flow.

In addition, the sewage blocking nets extend along the width direction of the water intake open channel 7, and the water inlet depth of the multi-stage sewage blocking nets sequentially increases along the water flow direction, so that the interception area of the sewage blocking net positioned at the downstream is larger than that of the sewage blocking net positioned at the upstream, and the plugs at different water depths can be intercepted in a grading manner. The depth of the sewage blocking net is the distance from the bottom of the sewage blocking net to the water surface.

The multi-stage dirt blocking net comprises a first dirt blocking net 2, a second dirt blocking net 3 and a third dirt blocking net 4. The first, second and third sewage blocking nets 2, 3 and 4 are arranged at intervals along the water flow direction in the water intake open channel 7, and the first, second and third sewage blocking nets 2, 3 and 4 all extend along the width direction of the water intake open channel 7. And the widths of the first dirt blocking net, the second dirt blocking net and the third dirt blocking net are consistent with the widths of the water intake open channels. As shown in fig. 1, the first dirt blocking net 2, the second dirt blocking net 3 and the third dirt blocking net 4 are perpendicular to the water flow direction in the water intake open channel 7. The water depth of the first dirt blocking net 2 is 3-5m, preferably the water depth of the first dirt blocking net 2 is 4m. The depth of water entering the second sewage blocking net 3 is 5-6m, preferably, the depth of water entering the second sewage blocking net 3 is 6m. The third dirt blocking net 4 extends from the water surface of the water intake open channel 7 to the bottom of the water intake open channel 7.

Further, the mesh aperture of the first dirt blocking net 2 is 8-10cm, the mesh aperture of the second dirt blocking net 3 is 2-3cm, and the mesh aperture of the third dirt blocking net 4 is 0.5-1cm. The first dirt blocking net 2, the second dirt blocking net 3 and the third dirt blocking net 4 are all made of ultra-high molecular weight polyethylene fiber materials, and the ultra-high molecular weight polyethylene fiber materials have high toughness and wear resistance and are suitable for manufacturing the dirt blocking net.

The first dirt blocking net 2 is for example mainly used for intercepting plugs in the range of 4m from the water surface to below the water surface. For example: large jellyfish (white jellyfish, macular jellyfish), etc. The second dirt blocking net 3 is mainly used for blocking the blocking objects in the range of 4m under water to 6m under water. For example: small and medium jellyfish (small multi-tube jellyfish, gemini jellyfish, etc.) and small fish (small apartment, small sardine, brown blue-child fish, blue-round carangid, etc.), etc. Of course, since the mesh aperture of the first dirt blocking net 2 is larger than the mesh aperture of the second dirt blocking net 3, part of the blocking material may leak from the first dirt blocking net 2, and thus the second dirt blocking net 3 may also be used to intercept part of the blocking material leaking from the first dirt blocking net 2. The third dirt blocking net 4 is mainly used for blocking the blockage from the underwater 6m to the bottom of the water intake open channel 7. For example: red tide organisms, plankton larvae, shrimp, large benthonic animals, cladophora, and the like. Similarly to the first trafficking net 2, since the mesh aperture of the second trafficking net 3 is larger than the mesh aperture of the third trafficking net 4, a part of the blocking material may leak through the second trafficking net 3, and thus, the third trafficking net 4 may also serve to intercept a part of the blocking material leaking through the second trafficking net 3.

It should be noted that, the staff needs to clean the first dirt blocking net, the second dirt blocking net and the third dirt blocking net regularly to avoid the blocking or damaging of the dirt blocking net.

The trash blocking device can prevent the blocking objects from blocking the water intake 9 by blocking the blocking objects through the floating pontoon array 1 and the multi-stage blocking net, and can prevent the blocking objects in water from being concentrated on the trash blocking net to cause blocking and even damage of the trash blocking net. Therefore, the trash rack can effectively stage and intercept the blocking objects in water, and prevent the blocking objects from being too concentrated to cause damage to the trash rack.

Further, in order to avoid collapse of the first 2, second 3 and third 4 dirt barriers in extreme climates or accidents, the device further comprises a fourth dirt barrier 5. The fourth dirt blocking net 5 is located downstream of the third dirt blocking net 4 for blocking blockages in the water when the former three stages of dirt blocking nets collapse. The width of the fourth dirt blocking net 5 is also consistent with that of the water intake open channel 7, and the water inlet depth of the fourth dirt blocking net 5 extends from the water surface of the water intake open channel 7 to the bottom of the water intake open channel 7. When the three-stage dirt blocking net collapses, the residues of the dirt blocking net can be flushed downstream along with water flow, and in order to avoid the fourth dirt blocking net 5 from being flushed, the fourth dirt blocking net 5 should be made of a metal material with higher toughness strength, for example: stainless steel materials, and the like.

In this embodiment, the device further comprises a deflector 6, and the deflector 6 is fixedly installed at the bottom of the water intake open channel 7 and is located between the floating cylinder array 1 and the first dirt blocking net 2. Specifically, the deflector 6 has a U-shape, and the U-shaped opening of the deflector 6 faces downstream of the water intake open channel 7. During water intake, the baffle 6 is used for diverting the plugs moving along the water flow direction and located at the water bottom to two sides. More specifically, red tide organisms, plankton larvae and the like at the bottom of the water intake open channel 7 can be guided to move towards the two sides of the third sewage blocking net 4 through the U-shaped guide plate 6, so that the red tide organisms, plankton larvae and the like are prevented from being completely intercepted at the middle position of the third sewage blocking net 4, and further, the water level difference between the middle part and the two sides of the third sewage blocking net 4 is prevented.

In addition, the floating cylinder array 1 is U-shaped, and the U-shaped opening of the floating cylinder array 1 faces the downstream of the water intake open channel 7 and is used for diverting the plugs which move along the water flow direction and float on the water surface to two sides, so that the floating plugs in the water intake open channel 7 can be effectively dredged, and the accumulation of the plugs is avoided.

Referring to fig. 2a and 2b, in order to keep the floating barrel array 1 in a U-shape, the device further includes a plurality of anchor blocks 12, the plurality of anchor blocks 12 are fixedly mounted at the bottom of the open water intake channel 7, the plurality of anchor blocks 11 are arranged in a U-shape, and the U-shaped opening of the anchor block array faces downstream. The anchor blocks 11 are respectively in one-to-one correspondence with the floating pontoons 11, and are all positioned below the floating pontoons 11. The anchor blocks are connected to the floating drums 11 by means of ropes to position the floating drums 11 so that the array of floating drums 1 can maintain a U-shape. In particular, these anchor blocks are made of concrete.

In summary, the trash device can be used for intercepting pertinently according to the biological characteristics/attributes and the spatial distribution characteristics of the cold source plugs, so that the plugs in the water intake open channel can be effectively intercepted.

Example 2

Referring to fig. 1 and 3, the utility model further discloses a cold source system of a nuclear power station, which comprises a water intake open channel 7 and a water intake 9, and the cold source system further comprises a trash device in embodiment 1.

Wherein, the water intake open channel 7 is used for communicating an external water source and the water intake 9, and leading the water flow in the external water source into the water intake 9. The trash device is arranged in the water intake open channel 7 and used for blocking the blockage in the water flow.

It should be noted that, blocking objects in different water depths are respectively blocked by the floating cylinder array 1 and the multi-stage blocking net in the trash rack, so that blocking objects in water can be prevented from blocking the water intake 9, and blocking objects in water are prevented from being concentrated on one trash blocking net to cause blocking and even damage of the trash blocking net.

Therefore, the cold source system of the nuclear power station can continuously provide seawater for the nuclear power station as a cold source, and can effectively avoid the blockage of the water intake 9.

Further, the water intake open channel 7 in the cold source system is S-shaped. The S-shaped open water intake channel 7 can avoid severe impact on the water intake 9 caused by abandoned ships, culture rafts and other large floaters under extreme climatic conditions. Furthermore, both sides of the water intake open channel 7 are provided with anti-collision dikes 8. The anti-collision dike 8 is of a double-layer structure, extends along the length direction of the water intake open channel 7, can protect the two sides of the water intake open channel 7, and prevents the sides of the water intake open channel 7 from being damaged by direct impact of large-scale floaters.

It is to be understood that the above embodiments are merely illustrative of the application of the principles of the present utility model, but not in limitation thereof. Various modifications and improvements may be made by those skilled in the art without departing from the spirit and substance of the utility model, and are also considered to be within the scope of the utility model.

Claims (11)

1. A trash rack, comprising: a floating pontoon array (1) and a multi-stage dirt blocking net,

the floating cylinder array (1) and the multi-stage dirt blocking net are both arranged in the water taking open channel (7), the floating cylinder array (1) is positioned at the upstream of the multi-stage dirt blocking net,

the floating cylinder array extends along the width direction of the water intake open channel (7) and is used for intercepting plugs floating on the water surface of the water intake open channel (7),

the sewage blocking nets extend along the width direction of the water taking open channel (7), and the water inlet depth of the multi-stage sewage blocking nets sequentially increases along the water flow direction, so that the interception area of the sewage blocking net positioned at the downstream is larger than that of the sewage blocking net positioned at the upstream, and the plugs at different water depths can be intercepted in a grading manner.

2. The device according to claim 1, characterized in that the dirt blocking net comprises a first dirt blocking net (2), a second dirt blocking net (3) and a third dirt blocking net (4),

the first dirt blocking net (2), the second dirt blocking net (3) and the third dirt blocking net (4) are arranged at intervals along the water flow direction in the water taking open channel (7), the first dirt blocking net (2), the second dirt blocking net (3) and the third dirt blocking net (4) extend along the width direction of the water taking open channel (7),

the water inlet depth of the first dirt blocking net (2) is 3-5m,

the water inlet depth of the second dirt blocking net (3) is 5-6m,

the water inlet depth of the third dirt blocking net (4) extends from the water surface of the water intake open channel (7) to the bottom of the water intake open channel (7).

3. The device according to claim 2, characterized in that the width of the first, second and third sewage screens (3, 4) corresponds to the width of the water intake open channel,

the mesh aperture of the first dirt blocking net (2) is 8-10cm, the mesh aperture of the second dirt blocking net (3) is 2-3cm, and the mesh aperture of the third dirt blocking net (4) is 0.5-1cm.

4. The device according to claim 2, characterized in that the dirt blocking net further comprises a fourth dirt blocking net (5),

the fourth trash screen (5) is located at the downstream of the third trash screen (4), the width of the fourth trash screen is also consistent with that of the water intake open channel, and the water inlet depth of the fourth trash screen (5) extends from the water surface of the water intake open channel (7) to the bottom of the water intake open channel (7).

5. The device according to claim 4, wherein the first (2), second (3) and third (4) dirt barriers are each made of ultra high molecular weight polyethylene fibre material,

the fourth dirt blocking net (5) is made of stainless steel materials.

6. The device according to any one of claims 2-5, further comprising a deflector (6), said deflector (6) being fixedly mounted to the bottom of said open water intake channel (7) and being located between said array of floating cylinders (1) and said first dirt barrier net (2),

the guide plate (6) is U-shaped, and the U-shaped opening of the guide plate (6) faces the downstream of the water intake open channel (7) and is used for diverting the plugs moving along the water flow direction and being at the water bottom to two sides.

7. Device according to claim 1, characterized in that the array of floating cylinders (1) comprises a plurality of floating cylinders (11), flexible connections and two anchoring points, which are arranged opposite each other in the width direction of the open water intake channel (7),

the floating cylinders are arranged along the width direction of the water intake open channel (7), the flexible connecting piece sequentially penetrates through the floating cylinders so as to connect the floating cylinders in series,

and two ends of the flexible connecting piece are respectively connected with the two anchoring points and used for limiting the floating cylinder array.

8. The apparatus of claim 7 wherein the flotation tube is made of an LLDPE polyethylene material, the anchor points are made of a concrete material, and the flexible connection is a wire rope.

9. The device according to claim 7, characterized in that the array of floating cylinders is U-shaped and the openings of the array of floating cylinders (1) are directed downstream of the open water intake channel (7) for diverting plugs moving in the direction of the water flow and floating on the water surface to both sides,

the floating barrel array (1) also comprises a plurality of anchor blocks (12), the anchor blocks (12) are fixedly arranged at the bottom of the water intake open channel (7),

the anchor blocks (12) are positioned below the floating cylinders, the anchor blocks (12) are in one-to-one correspondence with the floating cylinders, and the anchor blocks are connected with the floating cylinders through ropes so as to position the floating cylinders.

10. A cold source system of a nuclear power station, which comprises a water intake open channel (7) and a water intake (9), and is characterized by further comprising a trash device as claimed in any one of claims 1-9,

the water intake open channel (7) is used for communicating an external water source with the water intake (9) and guiding water flow in the external water source into the water intake (9),

the trash device is arranged in the water intake open channel (7) and used for blocking plugs in water flow.

11. System according to claim 10, characterized in that the water intake open channel (7) is S-shaped, both sides of the water intake open channel (7) being provided with anti-collision dikes (8).