Disc type constant-speed nozzle permanent magnet structure for deaerator

Abstract

The utility model discloses a disc type constant speed nozzle permanent magnet structure for a deaerator, which relates to the technical field of nozzle maintenance, and comprises a nozzle device, a filter inner cylinder is arranged on the inner wall of the nozzle device, an end cover is arranged at the end part of the nozzle device, and the filter inner cylinder is arranged on the inner wall of the nozzle device. A sealing cover is installed on the end face of the end cover, the periphery of the sealing cover is connected with the end cover and the filtering inner cylinder through twenty bolts, nuts are installed at the connecting positions of the bolts and the end cover, and a permanent magnet layer is compounded on the inner wall of the sealing cover; according to the scheme, iron-based impurities and non-iron-based impurities which cannot pass through the filter screen of the filter inner cylinder are stored in the tank through the built-in permanent magnet dirt collecting tank assembly.

Description

Technical Field

[0001] This utility model relates to the field of nozzle maintenance technology, specifically a permanent magnet structure for a disc-type constant speed nozzle used in deaerators. Background Technology

[0002] Nozzle devices, especially those used in deaerators of large power plants, are used to fully atomize and deoxygenate condensate before it enters the deaerator equipment. Condensate inevitably contains impurities such as welding slag, iron-based metal fragments, and debris. Therefore, cleaning of nozzle devices, inspection and maintenance of filter devices, and other related work are frequently required during unit shutdowns for maintenance.

[0003] Routine equipment cleaning, filter inspection, and maintenance require the removal of external connecting pipelines and the removal of the nozzle assembly flange cover before these operations can be carried out. The removal of pipelines and flange covers necessitates the use of overhead cranes or electric hoists (each part weighs approximately 300 kg), and involves the removal of a significant number of studs. For example, in a megawatt-class power plant, a single deaerator in a thermal power unit requires two sets of nozzle assemblies, while a nuclear power unit requires four sets. Each nozzle assembly typically involves the removal and installation of approximately 60 studs.

[0004] In summary, traditional methods have the following shortcomings:

[0005] 1. The operation requires the use of lifting equipment, which needs to be pre-installed, resulting in high construction costs;

[0006] 2. The operation involves working at heights, which presents certain difficulties and safety hazards;

[0007] 3. The disassembly and assembly of too many studs is complicated, time-consuming, and costly.

[0008] 4. The flange part is the pressure-bearing boundary of the pressure vessel. After reinstallation, there may be leakage or other sealing failure problems, which pose a safety hazard.

[0009] 5. Since the sealing gaskets are disposable parts and cannot be reused, new sealing gaskets must be replaced each time they are installed. Each nozzle device requires two sealing gaskets, resulting in a large number of spare sealing gaskets, high procurement and management costs, and poor economic efficiency.

[0010] 6. It is inconvenient to collect and recycle fine iron-based materials; therefore, we propose a disc-type constant speed nozzle permanent magnet structure for deaerators to solve the problems mentioned above. Utility Model Content

[0011] The purpose of this utility model is to provide a permanent magnet structure for a disc-type constant speed nozzle for a deaerator, in order to solve the problem mentioned in the background art that the existing nozzle device requires the removal of the flange cover and bend assembly on the top of the nozzle device, the removal of the internal filter cartridge assembly, and the reassembly after the task is completed when performing sewage discharge or internal maintenance. The disassembly and assembly process involves high-altitude operations, the use of lifting equipment, a large number of thread disassembly and assembly, replacement of gaskets, and necessary sealing tests, which is a rather cumbersome process.

[0012] To achieve the above objectives, this utility model provides the following technical solution: a permanent magnet structure for a disc-type constant speed nozzle in a deaerator, comprising a nozzle device, a filter inner cylinder provided on the inner wall of the nozzle device, an end cap installed at the end of the nozzle device, a sealing cap installed on the end face of the end cap, and the sealing cap being connected to the end cap and the filter inner cylinder by bolts around its perimeter, a nut installed at the connection between the bolts and the end cap, an anti-loosening washer provided at the connection between the nut and the end cap, and a permanent magnet sludge collection tank assembly provided on the inner wall of the sealing cap, and the permanent magnet sludge collection tank assembly being welded to the sealing cap.

[0013] Preferably, a handle is installed on the outer wall of the sealing cover.

[0014] Preferably, the rear end of the nozzle device is equipped with a water inlet device and a deaerator housing.

[0015] Preferably, the upper end of the nozzle device is provided with a condensate trap, one end of the condensate trap is provided with a condensate line, one end of the condensate trap is connected to the inlet device flange through the inlet device flange cover, and the condensate line is connected to the other end flange of the condensate trap through the condensate line flange.

[0016] Preferably, a first sealing gasket is provided between the flange of the water inlet device and the flange cover of the water inlet device, and is fastened to the flange with a second stud and a second nut; a second sealing gasket is provided between the condensate bend and the condensate pipeline, and is fastened to the condensate pipeline with a third stud and a third nut.

[0017] Preferably, the permanent magnet layer and the permanent magnet sludge collection tank assembly are made of neodymium iron boron, bonded neodymium iron boron, or injection-molded neodymium iron boron.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] This invention does not use the method of removing the system flange pipeline. Instead, an inspection hole is opened on the bottom end cover of the nozzle device, and a sealing cover, handle, fasteners, etc. are added. The device uses a built-in permanent magnet sludge collection tank assembly to store iron-based impurities and non-iron-based impurities that cannot pass through the filter inner cylinder screen in the tank. When the machine is stopped and sewage discharge or maintenance is required, the bottom sealing cover is removed by removing the bolts. Sludge discharge, cleaning and maintenance operations can be carried out through the inspection hole exposed at the sealing cover removal point, and it is convenient for subsequent recovery of iron-based impurities. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the sealing cap connection structure of this utility model;

[0022] Figure 3 This is a partial structural diagram of the permanent magnet sludge collection tank assembly of this utility model;

[0023] Figure 4 This is a partial structural diagram of the end cap of this utility model;

[0024] Figure 5 This is a partial structural diagram of the filter inner cylinder of this utility model;

[0025] In the diagram: 1. Handle; 2. Sealing cap; 201. Permanent magnet layer; 3. Bolt; 4. Nut; 5. Anti-loosening washer; 6. End cap; 7. Permanent magnet sludge collection tank assembly; 8. Filter inner cylinder; 9. Nozzle device; 10. Water inlet device; 11. Water inlet device flange cover; 12. First sealing gasket; 13. Second stud; 14. Second nut; 15. Deaerator equipment housing; 16. Condensate bend; 17. Condensate pipeline flange; 18. Second sealing gasket; 19. Third stud; 20. Third nut; 21. Condensate pipeline. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0027] Example 1

[0028] Please see Figure 1-5A disc-type constant-speed nozzle permanent magnet structure for a deaerator includes a nozzle device 9, a filter inner cylinder 8 disposed on the inner wall of the nozzle device 9, an end cap 6 installed at the end of the nozzle device 9, a sealing cap 2 installed on the end face of the end cap 6, and the sealing cap 2 is connected to the end cap 6 and the filter inner cylinder 8 by bolts 3 around its perimeter. Nuts 4 are installed at the connection between the bolts 3 and the end cap 6, and anti-loosening washers 5 are provided at the connection between the nuts 4 and the end cap 6. A permanent magnet sludge collection tank assembly 7 is disposed on the inner wall of the sealing cap 2, and the permanent magnet sludge collection tank assembly 7 is welded to the sealing cap 2. A handle 1 is installed on the outer wall of the sealing cap 2. A water inlet device 10 and a deaerator device are installed at the rear end of the nozzle device 9. The housing 15 and the nozzle device 9 are equipped with a condensate trap 16 at the upper end. A condensate line 21 is provided at one end of the condensate trap 16. One end of the condensate trap 16 is connected to the flange of the water inlet device 10 through the water inlet device flange cover 11. The condensate line 21 is connected to the flange of the other end of the condensate trap 16 through the condensate line flange 17. A first sealing gasket 12 is provided between the flange of the water inlet device 10 and the water inlet device flange cover 11, and is fastened to the second end with a second stud 13 and a second nut 14. A second sealing gasket 18 is provided between the condensate trap 16 and the condensate line 21, and is fastened to the third end with a third stud 19 and a third nut 20.

[0029] The device includes a sealing cover 2, a permanent magnet sludge collection tank assembly 7, a filter inner cylinder 8, bolts 3, nuts 4, anti-loosening washers 5, and a handle 1. The device first stores iron-based impurities and non-iron-based impurities that cannot pass through the filter screen of the filter inner cylinder 8 in the built-in permanent magnet sludge collection tank assembly 7. When the machine is stopped and sewage discharge or maintenance is required, the sealing cover 2 at the bottom is removed by removing bolts 3. Sludge discharge, cleaning and maintenance operations can be carried out through the inspection hole exposed at the removal point of the sealing cover 2, and it is convenient to recover iron-based impurities in the future.

[0030] The device is only used for disassembly and assembly within the equipment, and its total weight does not exceed 20kg. Except for the use of a torque wrench, disassembly and assembly can be completed by hand without any other equipment.

[0031] The material can be carbon steel, low alloy steel, or high alloy steel, preferably a material commonly used in the field such as high alloy steel austenitic stainless steel, and more preferably austenitic ultra-low carbon stainless steel.

[0032] Furthermore, the permanent magnet layer 201 and the permanent magnet sludge collection tank assembly 7 are made of neodymium iron boron;

[0033] Neodymium iron boron permanent magnet material is the third generation of rare earth permanent magnet material. It has high remanence, coercivity and maximum energy product, is not easily broken, has good mechanical properties, and its low alloy density is conducive to the lightweight, thin, small and ultra-small magnetic components. It is suitable for devices with small size and lightweight requirements.

[0034] Example 2

[0035] A disc-type constant-speed nozzle permanent magnet structure for a deaerator includes a nozzle device 9, a filter inner cylinder 8 disposed on the inner wall of the nozzle device 9, an end cap 6 installed at the end of the nozzle device 9, a sealing cap 2 installed on the end face of the end cap 6, and the sealing cap 2 is connected to the end cap 6 and the filter inner cylinder 8 by bolts 3 around its perimeter. Nuts 4 are installed at the connection between the bolts 3 and the end cap 6, and anti-loosening washers 5 are provided at the connection between the nuts 4 and the end cap 6. A permanent magnet sludge collection tank assembly 7 is disposed on the inner wall of the sealing cap 2, and the permanent magnet sludge collection tank assembly 7 is welded to the sealing cap 2. A handle 1 is installed on the outer wall of the sealing cap 2. A water inlet device 10 and a deaerator device are installed at the rear end of the nozzle device 9. The housing 15 and the nozzle device 9 are equipped with a condensate trap 16 at the upper end. A condensate line 21 is provided at one end of the condensate trap 16. One end of the condensate trap 16 is connected to the flange of the water inlet device 10 through the water inlet device flange cover 11. The condensate line 21 is connected to the flange of the other end of the condensate trap 16 through the condensate line flange 17. A first sealing gasket 12 is provided between the flange of the water inlet device 10 and the water inlet device flange cover 11, and is fastened to the second end with a second stud 13 and a second nut 14. A second sealing gasket 18 is provided between the condensate trap 16 and the condensate line 21, and is fastened to the third end with a third stud 19 and a third nut 20.

[0036] Furthermore, the permanent magnet layer 201 and the permanent magnet sludge collection tank assembly 7 are made of bonded neodymium iron boron;

[0037] Bonded NdFeB magnets are composite NdFeB permanent magnets made by uniformly mixing NdFeB powder with binders such as resin, plastic, or low-melting-point metals, and then using methods such as compression, extrusion, or injection molding. The product is formed in one step without secondary processing and can be directly made into various complex shapes. Bonded NdFeB magnets have magnetism in all directions, high precision, excellent magnetic properties, good corrosion resistance, and good temperature stability, making them suitable for devices used in high-temperature environments.

[0038] Example 3

[0039] A disc-type constant-speed nozzle permanent magnet structure for a deaerator includes a nozzle device 9, a filter inner cylinder 8 disposed on the inner wall of the nozzle device 9, an end cap 6 installed at the end of the nozzle device 9, a sealing cap 2 installed on the end face of the end cap 6, and the sealing cap 2 is connected to the end cap 6 and the filter inner cylinder 8 by bolts 3 around its perimeter. Nuts 4 are installed at the connection between the bolts 3 and the end cap 6, and anti-loosening washers 5 are provided at the connection between the nuts 4 and the end cap 6. A permanent magnet sludge collection tank assembly 7 is disposed on the inner wall of the sealing cap 2, and the permanent magnet sludge collection tank assembly 7 is welded to the sealing cap 2. A handle 1 is installed on the outer wall of the sealing cap 2. A water inlet device 10 and a deaerator device are installed at the rear end of the nozzle device 9. The housing 15 and the nozzle device 9 are equipped with a condensate trap 16 at the upper end. A condensate line 21 is provided at one end of the condensate trap 16. One end of the condensate trap 16 is connected to the flange of the water inlet device 10 through the water inlet device flange cover 11. The condensate line 21 is connected to the flange of the other end of the condensate trap 16 through the condensate line flange 17. A first sealing gasket 12 is provided between the flange of the water inlet device 10 and the water inlet device flange cover 11, and is fastened to the second end with a second stud 13 and a second nut 14. A second sealing gasket 18 is provided between the condensate trap 16 and the condensate line 21, and is fastened to the third end with a third stud 19 and a third nut 20.

[0040] Furthermore, the permanent magnet layer 201 and the permanent magnet sludge collection tank assembly 7 are made of injection-molded neodymium iron boron;

[0041] Injection-molded NdFeB magnets offer extremely high precision and are easily manufactured into thin-walled rings or thin magnets with complex anisotropic shapes. Due to their low price and moderate magnetic properties, they have become a widely used type of magnet. When there are no additional requirements for the device, choosing this material can effectively reduce costs.

[0042] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A permanent magnet structure for a disc-type constant-speed nozzle in a deaerator, comprising a nozzle device (9), characterized in that: The nozzle device (9) has a filter inner cylinder (8) on its inner wall. The nozzle device (9) has an end cap (6) installed at its end. The end cap (6) has a sealing cap (2) installed on its end face. The sealing cap (2) is connected to the end cap (6) and the filter inner cylinder (8) by bolts (3). The bolts (3) and the end cap (6) are connected by nuts (4). The nuts (4) and the end cap (6) are connected by anti-loosening washers (5). The sealing cap (2) has a permanent magnet layer (201) on its inner wall. The sealing cap (2) has a permanent magnet sludge collection tank assembly (7) on its inner wall. The permanent magnet sludge collection tank assembly (7) is welded to the sealing cap (2).

2. The permanent magnet structure of a disc-type constant speed nozzle for a deaerator according to claim 1, characterized in that: A handle (1) is installed on the outer wall of the sealing cover (2).

3. The permanent magnet structure of a disc-type constant speed nozzle for a deaerator according to claim 1, characterized in that: The nozzle device (9) is equipped with a water inlet device (10) and a deaerator housing (15) at its rear end.

4. The permanent magnet structure of a disc-type constant speed nozzle for a deaerator according to claim 3, characterized in that: The upper end of the nozzle device (9) is provided with a condensate trap (16), and a condensate line (21) is provided at one end of the condensate trap (16). One end of the condensate trap (16) is connected to the flange of the water inlet device (10) through the flange cover (11) of the water inlet device, and the condensate line (21) is connected to the flange of the other end of the condensate trap (16) through the condensate line flange (17).

5. The permanent magnet structure of a disc-type constant speed nozzle for a deaerator according to claim 4, characterized in that: A first sealing gasket (12) is provided between the flange of the water inlet device (10) and the flange cover (11) of the water inlet device, and is fastened to the second nut (14) with a second stud (13). A second sealing gasket (18) is provided between the condensate bend (16) and the condensate pipeline (21), and is fastened to the third nut (20) with a third stud (19).

6. The permanent magnet structure of a disc-type constant speed nozzle for a deaerator according to claim 1, characterized in that: The permanent magnet layer (201) and the permanent magnet sludge collection tank assembly (7) are made of neodymium iron boron, bonded neodymium iron boron or injection-molded neodymium iron boron.

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