Gas nozzle and underwater gas curtain device

Abstract

The utility model discloses a gas nozzle and an underwater air curtain device, the gas nozzle comprises a nozzle seat, a nozzle main body and a check valve, and the check valve is hermetically connected with the nozzle main body; the nozzle seat comprises a seat body and a hot melting layer welded with a pipeline in a hot melting mode, the hot melting layer is sleeved outside the seat body in a sealing mode, and the nozzle body is connected with the seat body in a sealing mode. And the interiors of the seat body, the nozzle main body and the check valve are communicated and jointly form an air passage, or the interiors of the nozzle main body and the check valve are communicated and jointly form the air passage. The hot melting layer of the nozzle seat provides a foundation for hot melting welding with the pipeline, and the gas nozzle and the pipeline are stable and firm in structure and high in practicability after being mounted. Corrosion falling and scouring falling can be avoided, the service life of the gas nozzle is prolonged, and the later maintenance cost is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of cold source safety of nuclear power plants, in particular to a gas nozzle and an underwater air curtain device. Background Art

[0002] The cooling source is the ultimate heat sink for heat dissipation in nuclear power plants. Its safety is directly linked to the safety and availability of the power plant. Historical experience shows that nuclear power plant cooling sources have been repeatedly threatened by marine organisms, resulting in serious consequences such as unit trips. According to the nuclear power plant's classification and risk assessment of marine organisms (such as plankton), jellyfish are classified as high-risk cooling source organisms, posing a significant threat to the reliable operation of the cooling source. The cooling source water intake of nuclear power plants faces ocean currents, and organisms with poor swimming ability, such as jellyfish, can be quickly carried by the current into the open water intake channel, leading to a high number of jellyfish in the channel.

[0003] Based on the buoyant nature of jellyfish and the design of the nuclear power plant's intake channel, two air curtain walls were added at the entrance to the outer basin of the intake channel. These walls inflate the jellyfish's bladders through the air curtains, preventing them from sinking. This facilitates salvage and reduces clogging of the trash net. The air curtains are formed by an air curtain device that uses an air compressor to pump compressed air into a pipe located on the seabed at the entrance of the open intake channel. The compressed air is then ejected through nozzles mounted on the pipe, forming a curtain of bubbles. When bladder-like plankton, such as jellyfish, pass through the air curtains, the vertically rising bubbles penetrate the organisms' bladders, causing them to float to the surface due to the buoyancy of the bubbles, preventing them from sinking. This not only facilitates salvage but also prevents large-scale clogging of the trash net by plankton, improving the reliability of the cooling system.

[0004] The existing connection method of the air curtain device is to use a nozzle to drill a hole in the pipe and connect it to the nozzle through electric fusion welding. Since the air curtain device is located in a marine environment, it is affected by factors such as marine organism attachment, seawater corrosion, and ocean currents. There are bumps and collisions during underwater installation, and the anti-corrosion and anti-attachment technology is insufficient. It cannot completely avoid corrosion and erosion shedding during operation. After long-term operation, a large area of ​​nozzles fall off, resulting in poor performance of the original equipment, which greatly increases the subsequent maintenance costs. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a gas nozzle and an underwater air curtain device.

[0006] The technical solution adopted by the utility model to solve the technical problem is: a gas nozzle, comprising a nozzle seat, a nozzle body and a check valve, wherein the check valve is sealedly connected to the nozzle body;

[0007] The nozzle seat comprises a seat body and a hot-melt layer that is hot-melt welded to the pipe, the hot-melt layer is sealed and sleeved on the outside of the seat body, and the nozzle body is sealed and connected to the seat body;

[0008] The seat body, the nozzle body and the check valve are connected to form an air passage, or the nozzle body and the check valve are connected to form an air passage.

[0009] In some embodiments, the nozzle body includes a connecting section, a nozzle, and a force-bearing section for connecting a disassembly and assembly tool, the connecting section is connected to the seat body, the nozzle is connected to the check valve, and the force-bearing section is provided between the connecting section and the nozzle;

[0010] The minimum outer diameter of the force-bearing section is greater than the maximum outer diameters of the connecting section and the nozzle.

[0011] In some embodiments, the nozzle body further comprises a transition section, wherein the transition section is provided between the force-bearing section and the nozzle;

[0012] The check valve comprises a sleeve section and a valve body, wherein the sleeve section is sealingly sleeved on the transition section, and the valve body is wrapped around the outside of the nozzle and communicated with the air outlet of the nozzle.

[0013] In some embodiments, the nozzle is a conical structure and is provided with a penetrating air outlet channel, and the air outlet channel is provided on the axis of the nozzle;

[0014] The diameter of the air outlet channel is 0.9 mm to 1.1 mm.

[0015] In some embodiments, the nozzle body further comprises an air inlet section, and the air inlet section is provided at an end of the connecting section away from the force-bearing section;

[0016] The air intake section is a conical structure and is provided with an air intake passage running through it. The air intake passage is arranged on the axis of the air intake section.

[0017] In some embodiments, the connecting section is provided with an external thread, the base body is provided with an internal thread, and the connecting section is screwed and fixed to the base body;

[0018] The gas nozzle further comprises a sealing ring, which is sleeved on the connecting section and in sealing contact with the seat body.

[0019] In some embodiments, the check valve is a duckbill valve made of silicone material.

[0020] In some embodiments, the seat body is a hollow structure made of duplex stainless steel.

[0021] In some embodiments, the hot-melt layer is a jacket made of polyethylene material, and the hot-melt layer is 12 mm to 20 mm higher than the seat body along its axial direction.

[0022] The utility model also constructs an underwater air curtain device, which includes a pipeline, an air source connected to the pipeline and a plurality of gas nozzles described above. The pipeline is provided with a plurality of mounting holes at intervals along its axial direction, and each of the gas nozzles is fixed to one of the mounting holes by hot-melt welding through a hot-melt layer.

[0023] By implementing the utility model, the following beneficial effects are achieved:

[0024] The gas nozzle of the present invention comprises a nozzle seat, a nozzle body, and a check valve, the check valve being hermetically connected to the nozzle body. The nozzle seat comprises a seat body and a hot-melt layer that is heat-melt-welded to a pipeline, the hot-melt layer being sealingly sleeved onto the exterior of the seat body, and the nozzle body being hermetically connected to the seat body. The seat body, the nozzle body, and the check valve are interconnected to form an airway, or the nozzle body and the check valve are interconnected to form an airway. The hot-melt layer of the nozzle seat provides a foundation for heat-melt welding to the pipeline, providing a stable and reliable structure after installation between the gas nozzle and the pipeline, and enhancing practicality. This prevents corrosion and erosion, extending the service life of the gas nozzle and significantly reducing subsequent maintenance costs.

[0025] The present invention comprises an underwater air curtain device comprising a pipeline, an air source connected to the pipeline, and a plurality of gas nozzles as described above. The pipeline is provided with a plurality of mounting holes spaced apart along its axial direction, and each gas nozzle is secured to one of the mounting holes by heat-melting a heat-melting layer. Heat-melting the heat-melting layer of the nozzle holder to the pipeline mounting hole strengthens the fixation of the gas nozzles, securely attaching them to the pipeline, and preventing them from being dislodged by corrosion and erosion. This extends the service life of the underwater air curtain device and significantly reduces subsequent maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0027] Figure 1 This is a cross-sectional view of the underwater air curtain device of Example 1 of the present utility model;

[0028] Figure 2 yes Figure 1 Schematic diagram of the structure of the nozzle seat;

[0029] Figure 3 This is a schematic structural diagram of a nozzle holder according to another embodiment of the present invention;

[0030] Figure 4 yes Figure 3A top view of the nozzle holder in FIG.

[0031] Figure 5 yes Figure 1 A cross-sectional view of the gas nozzle in FIG.

[0032] Figure 6 yes Figure 1 A top view of the gas nozzle in FIG.

[0033] Figure 7 yes Figure 3 A cross-sectional view of the nozzle body in FIG.

[0034] Figure 8 is a cross-sectional view of a nozzle body according to another embodiment of the present invention;

[0035] Figure 9 This is a schematic structural diagram of the nozzle body of the second embodiment of the present utility model;

[0036] Figure 10 yes Figure 9 A top view of the nozzle body in FIG.

[0037] Figure 11 This is a schematic structural diagram of a check valve according to a second embodiment of the present invention;

[0038] Figure 12 yes Figure 11 Schematic diagram of the structure of the check valve from another perspective. DETAILED DESCRIPTION

[0039] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation methods of the present invention are now described in detail with reference to the accompanying drawings.

[0040] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other.

[0041] In the description of the utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the utility model, unless otherwise specified, "multiple" means two or more.

[0042] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or chemical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0043] Example 1:

[0044] See also Figure 1 One embodiment of the present invention discloses an underwater air curtain device for forming an air curtain wall. The device is designed to inflate the jellyfish's bladder through the air curtain, preventing it from sinking after passing through the air curtain wall. This facilitates salvage and reduces the area of ​​clogging in the trash net, thereby protecting the cooling system of nuclear power plants.

[0045] The underwater air curtain device includes a pipeline 6, an air source connected to the pipeline 6, and a plurality of gas nozzles. The pipeline 6 is provided with a plurality of mounting holes spaced apart along its axial direction, and each gas nozzle is fixed to a mounting hole by hot-melt welding through a hot-melt layer 12. The pipeline 6 may include one or more polyethylene pipelines 6, and a gas nozzle is provided on each pipeline 6 at a certain interval (e.g., 250 mm, 300 mm, 400 mm). The number of gas nozzles can be set according to actual needs, such as 10, 15, 20, etc. The air source includes an air compressor arranged on the shore, which fills the interior of the pipeline 6 with compressed air, and the air is ejected through a plurality of gas nozzles to form an air curtain wall. The air source is not shown in the figure, and only part of the pipeline 6 structure is shown in the figure.

[0046] See together Figures 2 to 7 The gas nozzle comprises a nozzle holder 1, a nozzle body 2, and a check valve 3, which is sealed to the nozzle body 2. The nozzle holder 1 comprises a seat 11 and a hot melt layer 12, which is heat-melted to the pipe 6. The hot melt layer 12 is sealedly sleeved onto the outside of the seat 11, sealing the nozzle body 2 to the seat 11. The nozzle body 2 is made of duplex stainless steel, while the seat 11 is a hollow structure made of duplex stainless steel, thereby enhancing the overall strength of the gas nozzle. The hot melt layer 12 is a polyethylene outer shell that covers part or all of the outer circumference of the seat 11. The hot melt layer 12 is 12 mm to 20 mm higher than the seat 11 in the axial direction, meaning that the hot melt layer 12 protrudes beyond the wall of the pipe 6 by 12 mm to 20 mm, for example, 12 mm, 14 mm, or 16 mm. The axial height of the seat 11 is greater than the axial height of the hot melt layer 12. For example, the axial height of the seat 11 is equal to the wall thickness of the pipe 6 plus the axial height of the hot melt layer 12. A hot melt layer 12 is disposed on one end of the base 11 near the check valve 3. The check valve 3 is a duckbill valve made of silicone material, ensuring proper air ejection and preventing backflow of the aqueous medium. In other embodiments, the check valve 3 may be a swing check valve 3, a lift check valve 3, a high-pressure gas check valve 3, or other similar valves. The appropriate check valve 3 can be selected based on practical needs. The check valve 3 is conventional and will not be described in detail here.

[0047] The interiors of the seat 11, nozzle body 2, and check valve 3 are interconnected and collectively form an airway 4. Airway 4 is used to discharge air from the interior of the pipe 6. The seat 11, nozzle body 2, and check valve 3 are each hollow structures. If the seat 11 is directly connected to the interior of the pipe 6, and the nozzle body 2 is connected to the interior of the seat 11 and the interior of the check valve 3, the airway 4 is formed between the seat 11, nozzle body 2, and check valve 3. Alternatively, if the seat 11 is entirely used to mount the nozzle body 2, and the nozzle body 2 extends outside the seat 11 and directly connects to the interior of the pipe 6, the airway 4 is formed between the nozzle body 2 and the check valve 3.

[0048] When installing the gas nozzle on the pipe 6, the base 11 is first screwed into the mounting hole of the pipe 6 for preliminary fixation, and then the hot melt layer 12 is heat-welded to the pipe 6. Generally, after heat-melting, the hot melt layer 12 can be tightly adhered to the outer wall of the pipe 6 and partially to the gap between the base 11 and the pipe 6, thereby improving the installation strength of the gas nozzle, preventing the gas nozzle from falling off, and improving the airtightness of the gas nozzle installation.

[0049] In some embodiments, the nozzle body 2 includes a connecting section 21, a nozzle 22, and a force-bearing section 23 for connection to a disassembly and assembly tool. The connecting section 21 is connected to the base 11, and the nozzle 22 is connected to the check valve 3. The force-bearing section 23 is located between the connecting section 21 and the nozzle 22. The minimum outer diameter of the force-bearing section 23 is greater than the maximum outer diameter of the connecting section 21 and the nozzle 22. The force-bearing section 23 can have a hexagonal structure, a quadrilateral structure, etc., and can be clamped by a disassembly and assembly tool such as a wrench or a socket for disassembly and assembly. The connecting section 21, the nozzle 22, and the force-bearing section 23 are all hollow structures and together constitute a portion of the airway 4.

[0050] In some embodiments, the connecting section 21 has external threads, the base 11 has internal threads, and the connecting section 21 is screwed and fixed to the base 11. The gas nozzle further includes a sealing ring 5, which is sleeved on the connecting section 21 and seals against the base 11.

[0051] In some embodiments, the nozzle body 2 further includes a transition section 24, which is disposed between the force-bearing section 23 and the nozzle 22. The check valve 3 includes a sleeve section 32 and a valve body 31. The sleeve section 32 is sealingly sleeved onto the transition section 24. The valve body 31 wraps around the exterior of the nozzle 22 and communicates with the air outlet of the nozzle 22. For example, the check valve 3 is a duckbill valve, and the valve body 31 is the main body of the duckbill valve, shaped like a duckbill. The valve body 31 and the sleeve section 32 can be an integral structure, with the sleeve section 32 adhesively fixed to the exterior of the transition section 24. The air outlet of the valve body 31 is arranged directly opposite the air outlet of the nozzle 22.

[0052] In some embodiments, the nozzle 22 has a conical structure and is provided with a through-going air outlet channel 41, which is located on the axis of the nozzle 22. The air outlet channel 41 constitutes a portion of the air channel 4, with the other portion of the air channel 4 formed by the hollow structure of the connecting section 21 and the force-bearing section 23, or the other portion of the air channel 4 formed by the hollow structure of the connecting section 21, the force-bearing section 23, and the base 11. The diameter of the air outlet channel 41 is 0.9 mm to 1.1 mm, for example, 0.9 mm, 1.0 mm, 1.1 mm, etc. The conical structure of the nozzle 22 is high in the middle and low around the edges, with its cone apex facing the outside of the nozzle body 2, which can reduce the area where marine organisms attach, prevent marine organisms from directly clogging the nozzle 22 hole, and greatly alleviate the problem of marine organism attachment. It is understandable that in some other embodiments, the nozzle 22 has a bidirectional conical structure, formed by the bottoms of two conical structures superimposed, with the axes of the two conical structures overlapping and parallel to the axis of the connecting section 21. The conical structure with its apex facing the inside of the pipe 6 is high in the middle and low around the edges, which can prevent foreign matter in the pipe 6 from staying at the air inlet of the air outlet channel 41 to cause blockage and affect exhaust.

[0053] In some embodiments, see also Figure 8The nozzle body 2 also includes an air inlet section 25, which is provided at the end of the connecting section 21 away from the force-bearing section 23. The air inlet section 25 is a conical structure and is provided with a penetrating air inlet channel 42, which is provided on the axis of the air inlet section 25. The air inlet channel 42 and the air outlet channel 41 are connected to form a complete air channel 4, or a gap is left between the air inlet channel 42 and the air outlet channel 41, and the air channel 4 is formed by the hollow structure of the air inlet channel 42, the air outlet channel 41, the connecting section 21 and the force-bearing section 23. The air inlet section 25 with a conical structure is similar to the nozzle 22, with a high middle and low sides. The apex of the cone faces the outside of the nozzle body 2, which can reduce the area of ​​foreign matter adhesion and prevent foreign matter in the pipe 6 from staying at the air inlet of the air inlet channel 42 to cause blockage and affect exhaust. It can be understood that in some other embodiments, the air intake section 25 is a bidirectional conical structure, which is formed by the bottoms of two conical structures superimposed on each other, and the axes of the two conical structures coincide with and are parallel to the axis of the connecting section 21, so that the air intake channel 42 can be extended.

[0054] Example 2:

[0055] See also Figures 9 to 12 The second embodiment of the present invention discloses a gas nozzle comprising a nozzle holder 1, a nozzle body 2, and a check valve 3, which is sealed to the nozzle body 2. Unlike the first embodiment, the nozzle body 2 further includes a positioning protrusion 26 disposed on the outer wall of the transition section 24. The check valve 3 also includes a positioning groove 33 disposed within the sleeve section 32. The positioning groove 33 sleeves onto the positioning protrusion 26 to achieve securement. Preferably, both the positioning protrusion 26 and the positioning groove 33 are annular.

[0056] The other structures of this embodiment are the same as those of the first embodiment and will not be described in detail here.

[0057] By implementing the utility model, the following beneficial effects are achieved:

[0058] The gas nozzle of this utility model provides a foundation for heat-melting welding to the pipe 6 through the hot-melt layer 12 of the nozzle holder 1. After the gas nozzle and the pipe 6 are installed, the structure is stable and reliable, and the practicality is strong. It can prevent corrosion and erosion, extend the service life of the gas nozzle, and greatly reduce the cost of subsequent maintenance.

[0059] The underwater air curtain device of the present invention can strengthen the fixation of the gas nozzle by hot-melt welding the hot-melt layer 12 of the nozzle holder 1 and the installation hole of the pipe 6. The gas nozzle is firmly attached to the pipe 6, which can avoid corrosion and erosion, thereby extending the service life of the entire underwater air curtain device and greatly reducing the subsequent maintenance costs.

[0060] It can be understood that the above embodiments only express the preferred implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the patent scope of the present invention. It should be pointed out that for ordinary technicians in this field, without departing from the concept of the present invention, the above embodiments or technical features can be freely combined, and several deformations and improvements can be made, which all fall within the scope of protection of the present invention, that is, the embodiments described in "some embodiments" can be freely combined with any of the above and below embodiments. Therefore, all equivalent changes and modifications made to the scope of the claims of the present invention should fall within the scope of coverage of the claims of the present invention.

Claims

1. A gas nozzle, characterized in that: It comprises a nozzle seat (1), a nozzle body (2) and a check valve (3), wherein the check valve (3) is sealedly connected to the nozzle body (2); The nozzle seat (1) comprises a seat body (11) and a hot melt layer (12) hot-melt-welded to a pipe (6); the hot melt layer (12) is sealed and sleeved on the outside of the seat body (11); and the nozzle body (2) is sealed and connected to the seat body (11); The interiors of the seat body (11), the nozzle body (2) and the check valve (3) are connected and together form an air passage (4), or the interiors of the nozzle body (2) and the check valve (3) are connected and together form an air passage (4).

2. The gas nozzle according to claim 1, characterized in that The nozzle body (2) comprises a connecting section (21), a nozzle (22) and a force-bearing section (23) for connecting a disassembly tool, wherein the connecting section (21) is connected to the seat body (11), the nozzle (22) is connected to the check valve (3), and the force-bearing section (23) is arranged between the connecting section (21) and the nozzle (22); The minimum outer diameter of the force-bearing section (23) is greater than the maximum outer diameters of the connecting section (21) and the nozzle (22).

3. The gas nozzle according to claim 2, characterized in that The nozzle body (2) further comprises a transition section (24), wherein the transition section (24) is provided between the force-bearing section (23) and the nozzle (22); The check valve (3) comprises a sleeve section (32) and a valve body (31), wherein the sleeve section (32) is sealingly sleeved on the transition section (24), and the valve body (31) is wrapped around the outside of the nozzle (22) and communicated with the air outlet of the nozzle (22).

4. The gas nozzle according to claim 2, characterized in that The nozzle (22) is a conical structure and is provided with a penetrating air outlet channel (41), and the air outlet channel (41) is provided on the axis of the nozzle (22); The diameter of the air outlet channel (41) is 0.9 mm to 1.1 mm.

5. The gas nozzle according to claim 2, characterized in that The nozzle body (2) further comprises an air inlet section (25), and the air inlet section (25) is arranged at an end of the connecting section (21) away from the force-bearing section (23); The air intake section (25) is a conical structure and is provided with an air intake passage (42) running through it. The air intake passage (42) is arranged on the axis of the air intake section (25).

6. The gas nozzle according to claim 2, characterized in that The connecting section (21) is provided with an external thread, the seat body (11) is provided with an internal thread, and the connecting section (21) and the seat body (11) are screwed and fixed; The gas nozzle further comprises a sealing ring (5), which is sleeved on the connecting section (21) and is in sealing contact with the seat body (11).

7. The gas nozzle according to any one of claims 1 to 6, characterized in that: The check valve (3) is a duckbill valve made of silicone material.

8. The gas nozzle according to any one of claims 1 to 6, characterized in that: The seat body (11) is a hollow structure made of duplex stainless steel.

9. The gas nozzle according to any one of claims 1 to 6, characterized in that: The hot-melt layer (12) is a jacket made of polyethylene material, and the hot-melt layer (12) is 12 mm to 20 mm higher than the seat body (11) along its axial direction.

10. An underwater air curtain device, characterized in that: It comprises a pipeline (6), a gas source connected to the pipeline (6) and a plurality of gas nozzles according to any one of claims 1 to 9, wherein the pipeline (6) is provided with a plurality of mounting holes spaced apart along its axial direction, and each of the gas nozzles is fixed to one of the mounting holes by hot-melt welding through a hot-melt layer (12).

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