Atomizing head of pressure stabilizer

Abstract

The invention belongs to the technical field of nuclear power station voltage stabilizer spray heads, and particularly relates to a voltage stabilizer spray head. The device is of a centrifugal structure and comprises a shell and a rotary water core, the shell and the rotary water core are integrally formed through 3D printing, the shell is of an irregular structure and is divided into a shell upper portion, a shell middle portion and a shell lower portion, the shell upper portion is of an internal thread boss structure, the shell middle portion is of a hollow cylindrical structure, the rotary water core is located above the shell middle portion, and the shell lower portion is of a hollow cylindrical structure. And the lower part of the shell is provided with a vortex chamber and a spray head. When the optimal lead, the optimal groove width, the optimal groove depth, the optimal shell taper and the optimal shell nozzle diameter are guaranteed, the distribution uniformity of the mist amount can be guaranteed, and the working condition use requirements are met.

Description

Technical Field

[0001] The present invention belongs to the technical field of the pressure stabilizer spray head of a nuclear power plant, and particularly relates to a pressure stabilizer spray head. Background Art

[0002] The pressure stabilizer spray head is one of the key components of the pressure stabilizer of a nuclear power plant, and its main function is to maintain the differential pressure of the primary loop at a set value. When the pressure in the pressure stabilizer exceeds the upper limit of the normal operating pressure, the spray head sprays subcooled water into the steam space at the upper part of the pressure stabilizer to condense part of the steam, thereby reducing the pressure in the pressure stabilizer and restoring it to the specified pressure level.

[0003] The spray head structures widely used in domestic active nuclear power plants for pressure stabilizers are as Figure 1 shown, mainly including a housing, a double-layer water swirling core, and a stop screw structure: the liquid enters the spray head under the action of pressure, and the water swirling core of the spray head makes the liquid rotate, generating a tangential velocity and an axial velocity in the eddy current chamber, and accelerating and ejecting a hollow diffused conical liquid film in the spray nozzle (converging channel), and breaking and atomizing by using the high-speed difference between the liquid and the outside air.

[0004] For the pressure stabilizer spray head structure as Figure 1 shown, including a housing, an outer water swirling core, an inner water swirling core, an outer stop screw, and an inner stop screw, its layout structure is complex. To ensure uniform spray effect and prevent the inner and outer water swirling cores from loosening, a stop screw structure needs to be installed, which is not conducive to subsequent maintenance. To adapt to the application of a compact and efficient spray head and reduce the later maintenance cost, it is necessary to improve the design of the pressure stabilizer spray head structure. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a pressure stabilizer spray head, which can ensure the uniformity of the fog amount distribution and meet the working condition requirements when ensuring the best lead, the best groove width, the best groove depth, the best housing taper, and the best housing nozzle diameter.

[0006] The technical solution adopted by the present invention:

[0007] A pressure stabilizer spray head, which is of a centrifugal structure, includes a housing and a water swirling core. The housing and the water swirling core are integrally formed by 3D printing. The housing is of an irregular structure and is divided into an upper part of the housing, a middle part of the housing, and a lower part of the housing. The upper part of the housing is an internal thread boss structure. The middle part of the housing is a hollow cylindrical structure. The water swirling core is located above the middle part of the housing. The lower part of the housing is an eddy current chamber and a nozzle.

[0008] The size of the middle part of the housing below the water swirling core is an outer diameter of Ф165mm, an inner diameter of Ф142mm, and a height of 99mm. The inner diameter of the middle part of the housing corresponding to the water swirling core is larger than the inner diameter of the lower part of the middle part of the housing.

[0009] The taper inside the eddy current chamber is 90°.

[0010] The spray head has a Venturi structure with an outer diameter of Ф105mm and an inner diameter of Ф75mm, and a height of 75mm.

[0011] The outer diameter of the swirl water core structure is Ф145mm, and the height is 70mm.

[0012] The center of the swirl water core is a cylindrical structure with a diameter of Ф45mm, and 6 rotating blades are evenly arranged on the outer wall of the cylindrical structure.

[0013] The wall thickness of the rotating blades is unequal, thick at the outer circumference and thin at the inner circumference.

[0014] The thickness of the rotating blade near the cylindrical structure is 5.24mm, and the thickness of the rotating blade far from the cylindrical structure is 16.88mm.

[0015] The lead of the rotating blade is 420mm, the groove width is 40mm, and the groove depth is 50mm.

[0016] A 10mm center hole is opened in the center of the cylindrical structure.

[0017] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0018] A pressure regulator spray head provided by the present invention has a reliable structural design. It adopts the 3D printing integrated molding technology and a single-layer swirl water core with a 10mm center hole and a spray head structure formed by 3D printing integrated molding, which is convenient for later maintenance and replacement. The swirl water core adopts 6 rotating blades, which can ensure the uniformity of the fog volume distribution and meet the working condition requirements when ensuring the optimal lead, the optimal groove width, the optimal groove depth, the optimal shell taper, and the optimal shell spray head diameter. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1 Schematic diagram of the spray head structure of the prior art;

[0021] Figure 2 Cross-sectional view of a pressure regulator spray head provided by the present invention;

[0022] Figure 3 For Figure 2 Partial enlarged view;

[0023] Figure 4It is a schematic diagram of the structure of the swirling water core;

[0024] Figure 5 is Figure 4 a partially enlarged view;

[0025] In the figure: 1 - housing; 2 - outer swirling water core; 3 - inner swirling water core; 4 - outer stop screw; 5 - inner stop screw. Specific implementation manners

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0027] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0028] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0029] Such as Figure 2As shown, a voltage regulator spray head provided by the present invention is of a centrifugal structure, including a housing and a water swirling core. The housing and the water swirling core are integrally formed by 3D printing, with a total height of 290 mm, which can reduce the possibility of the internal structure of the spray head becoming foreign matter in the reactor. The housing is of an irregular structure, divided into an upper part of the housing, a middle part of the housing, and a lower part of the housing. The upper part of the housing is an internally threaded boss structure, which is convenient for the later maintenance and replacement of the spray head. The middle part of the housing is a hollow cylindrical structure. The water swirling core is located above the middle part of the housing. The size of the middle part of the housing below the water swirling core is an outer diameter of Ф165 mm, an inner diameter of Ф142 mm, and a height of 99 mm. The inner diameter of the middle part of the housing corresponding to the water swirling core is larger than the inner diameter of the lower part of the middle part of the housing. The lower part of the housing is a vortex chamber with a 90° taper and a nozzle. The nozzle has a "Venturi" structure with an outer diameter of Ф105 mm and an inner diameter of Ф75 mm, and a height of 75 mm.

[0030] As Figures 3 - 5 shown, the center of the water swirling core is a cylindrical structure with a diameter of Ф45 mm. Six rotating blades are evenly arranged on the outer wall of the cylindrical structure. The wall thickness of the rotating blades is of unequal thickness, thick at the outer circumference and thin at the inner circumference. The thickness of the rotating blade near the cylindrical structure is 5.24 mm, and the thickness of the rotating blade far from the cylindrical structure is 16.88 mm. The outer diameter of the water swirling core structure is Ф145 mm, the height is 70 mm, the lead of the rotating blade is 420 mm, the groove width is 40 mm, and the groove depth is 50 mm. The water swirling core can ensure the uniformity of the fog volume distribution of the spray head. In order to better supplement the fog volume, a 10 mm central hole is opened in the center of the cylindrical structure.

[0031] Under the action of pressure, the liquid enters the inside of the spray head. The fluid rotates through the water swirling core of the spray head, generating tangential velocity and axial velocity in the vortex chamber, and accelerating and spraying out a hollow diffusion conical liquid film in the nozzle (converging channel), and breaking and atomizing by using the high-speed difference between the liquid and the outside air. When the optimal lead, the optimal groove width, the optimal groove depth, the optimal housing taper, and the optimal housing nozzle diameter are ensured, the single-layer water swirling core structure can ensure the uniformity of the fog volume distribution of the spray head and meet the working condition requirements.

[0032] The present invention has novelty and creativity in the application field of a compact and efficient spray head for ensuring the safe operation of a nuclear power plant reactor.

[0033] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be construed as limiting the claims involved.

[0034] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A voltage regulator spray head, characterized in that, It is a centrifugal structure, including a housing and a water swirling core. The housing and the water swirling core are integrally formed by 3D printing. The housing is an irregular structure, divided into an upper part of the housing, a middle part of the housing, and a lower part of the housing. The upper part of the housing is an internal thread boss structure. The middle part of the housing is a hollow cylindrical structure. The water swirling core is located above the middle part of the housing. The lower part of the housing is a vortex chamber and a nozzle.

2. The voltage regulator spray head according to claim 1, characterized in that, The size of the middle part of the housing below the water swirling core is an outer diameter of Ф165mm, an inner diameter of Ф142mm, and a height of 99mm. The inner diameter of the middle part of the housing corresponding to the water swirling core is larger than the inner diameter of the lower part of the middle part of the housing.

3. The voltage regulator spray head according to claim 1, characterized in that, The taper inside the vortex chamber is 90°.

4. The pressure regulator spray head according to claim 1, characterized in that, The nozzle is a Venturi structure with an outer diameter of Ф105mm and an inner diameter of Ф75mm, and a height of 75mm.

5. The pressure regulator spray head according to claim 1, characterized in that, The outer diameter of the water swirling core structure is Ф145mm, and the height is 70mm.

6. The pressure regulator spray head according to claim 5, characterized in that, The center of the water swirling core is a cylindrical structure with a diameter of Ф45mm, and 6 rotating blades are evenly arranged on the outer wall of the cylindrical structure.

7. The pressure regulator spray head according to claim 6, characterized in that, The wall thickness of the rotating blades is of unequal thickness, thick at the outer circumference and thin at the inner circumference.

8. The pressure regulator spray head according to claim 7, characterized in that, The thickness of the rotating blade near the cylindrical structure side is 5.24mm, and the thickness of the rotating blade far from the cylindrical structure side is 16.88mm.

9. The pressure regulator spray head according to claim 8, characterized in that, The lead of the rotating blade is 420mm, the groove width is 40mm, and the groove depth is 50mm.

10. The pressure regulator spray head according to claim 9, characterized in that, A 10mm center hole is opened in the center of the cylindrical structure.

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