Steam-water separator assembly

Abstract

The steam-water separator assembly comprises a primary separator and a cyclone separator, a positioning sleeve is vertically fixed in an inner cavity of the cyclone separator, and the cyclone separator is connected with the primary separator through a fastening bolt. The fastening bolt is arranged in a hole in the positioning sleeve, the inner wall of the positioning sleeve is in clearance fit with the rod of the fastening bolt, and the fastening bolt is arranged through the positioning sleeve to fasten and connect the cyclone separator to the top of the primary separator.

Description

Technical Field

[0001] This disclosure relates to the field of steam-water separator technology, and more particularly to a steam-water separator assembly. Background Technology

[0002] In the steam generator of a nuclear power plant, the steam-water separation unit is a key component that ensures steam quality and prevents water droplets carried by the steam from corroding and damaging downstream equipment. The primary separator, as the first line of defense, is mainly responsible for removing large-diameter water droplets entrained in the steam. With increasing operational years or upgrades to meet higher steam quality requirements, there is a need during on-site construction to install additional cyclone separators on top of the existing primary separator to further improve steam-water separation efficiency.

[0003] In current engineering practice, the above-mentioned connection methods mostly use exposed flange bolts or ordinary hexagonal bolts for fastening. However, the steam flow rate inside the steam generator is extremely fast and there is a two-phase flow of steam and water. The exposed fasteners are directly exposed to the flow field and are easily affected by flow field interference and erosion wear, resulting in stress concentration and localized erosion corrosion.

[0004] Meanwhile, the steam generator is subjected to alternating loads of high temperature, high pressure, and high vibration for a long time. Simply relying on conventional fastening methods such as using ordinary nuts to tighten or adding flat washers may cause creep and loosening under the thermal expansion and continuous vibration during the initial stage of equipment operation, which may adversely affect the safe operation of the equipment.

[0005] In addition, flange bolt connections occupy a lot of space, making construction difficult in the narrow installation space inside the steam generator. Furthermore, the flanges and bolt heads protruding outside the flow channel can interfere with the flow state of the steam-water two-phase flow, generating unnecessary eddies and pressure losses.

[0006] In view of the problems mentioned above regarding the exposed fasteners in the compact space of the steam generator steam-water separator, which are susceptible to erosion and loosening under vibration, as well as the difficulty of assembly in a confined space, this disclosure proposes a steam-water separator assembly to solve one or more of the above-mentioned technical problems. Summary of the Invention

[0007] This disclosure solves the above-mentioned technical problems through the following technical solution: The purpose of this disclosure is to provide a steam-water separator assembly.

[0008] According to the first aspect of this disclosure, a steam-water separator assembly includes: a primary separator and a cyclone separator; A positioning sleeve is vertically fixed in the internal cavity of the cyclone separator, and the cyclone separator is connected to the primary separator by fastening bolts; The fastening bolt passes through the inner hole of the positioning sleeve, and the inner wall of the positioning sleeve is clearance-fitted with the shank of the fastening bolt. After passing through the positioning sleeve, the fastening bolt securely connects the cyclone separator to the top of the primary separator.

[0009] This disclosure discloses a vertically fixed positioning sleeve within the internal cavity of a cyclone separator. A fastening bolt passes through the inner hole of this sleeve, and the cyclone separator is securely connected to the top of the primary separator via the positioning sleeve. On one hand, the inner wall of the positioning sleeve has a clearance fit with the shank of the fastening bolt. When the steam-water mixture passes through the cyclone separator at high speed, generating airflow impact and equipment vibration, the positioning sleeve can withstand and decompose the shear stress in the lateral alternating load, limiting the lateral displacement of the fastening bolt. This allows the fastening bolt to primarily bear the axial tensile preload, thereby preventing lateral bending fatigue fracture of the fastening bolt during vibration and improving the connection structure's performance under high-voltage conditions. The system offers robust vibration and anti-loosening reliability under high temperature, high pressure, and high flow rate steam impact conditions. Furthermore, the positioning sleeve serves as a guide channel for the installation of the fastening bolts. When assembling the steam-water separation components within the narrow installation space inside the steam generator, the fastening bolts can be quickly and accurately aligned simply by inserting them along the inner wall of the sleeve, significantly improving assembly efficiency. Moreover, the fastening structure is integrated entirely within the cyclone separator, occupying minimal radial space. The absence of protruding bolt heads or large flanges on the outside maintains the smoothness of the steam flow channel, reducing unnecessary airflow eddies and pressure losses. The use of bolted connections instead of pure welding facilitates subsequent disassembly and maintenance.

[0010] In one or more embodiments, the primary separator is provided with a countersunk platform at the top, and a limiting hole is formed in the countersunk platform, with the bolt head of the fastening bolt placed upside down in the limiting hole; The top of the fastening bolt extends through the positioning sleeve and is used to fasten the cyclone separator to the top of the primary separator by means of a locking nut.

[0011] In one or more embodiments, the limiting hole is a polygonal hole, and the outer contour of the bolt head corresponds to the circumferential contour dimension of the limiting hole.

[0012] In one or more embodiments, the tightening direction of the locking nut is the same as the rotation direction of the steam-water mixture inside the cyclone separator.

[0013] In one or more embodiments, the primary separator is provided with a mounting plate on top, and the bottom end of the sink is welded to the mounting plate.

[0014] In one or more embodiments, the top of the primary separator is provided with a threaded sleeve, the threaded sleeve having an internal thread that mates with the fastening bolt, the fastening bolt passing through the positioning sleeve and being threadedly connected and locked with the threaded sleeve.

[0015] In one or more embodiments, the tightening direction of the fastening bolt is the same as the rotation direction of the steam-water mixture inside the cyclone separator.

[0016] In one or more embodiments, the top end of the positioning sleeve is further provided with a cap, the cap covering the top end of the fastening bolt; The top of the cap has a smooth curved surface.

[0017] In one or more embodiments, the cap is welded to the cyclone separator.

[0018] In one or more embodiments, the inner hole of the positioning sleeve is divided along its axial direction into an upper guide hole and a lower mating hole; The inner diameter of the upper guide hole is larger than the outer diameter of the shank of the fastening bolt, and the inner diameter of the lower mating hole is clearance-fitted with the outer diameter of the shank of the fastening bolt. The upper guide hole and the lower mating hole are connected by a tapered transition. Attached Figure Description

[0019] The above and other features, properties and advantages of this disclosure will become more apparent from the following description taken in conjunction with the accompanying drawings and embodiments, wherein: Figure 1 This is a schematic diagram of the structure of one embodiment of the steam-water separator assembly disclosed herein; Figure 2 This is a schematic diagram of another embodiment of the steam-water separator assembly disclosed herein.

[0020] 1. Primary separator; 11. Recessed platform; 111. Limiting hole; 12. Mounting plate; 13. Threaded sleeve; 2. Cyclone separator; 21. Positioning sleeve; 211. Upper section guide hole; 212. Lower section mating hole; 22. Cap; 23. Rib plate; 3. Tighten the bolts; 4. Tighten the nut. Detailed Implementation

[0021] The present disclosure will be further described below with reference to specific embodiments and accompanying drawings. More details are set forth in the following description in order to provide a full understanding of the present disclosure. However, the present disclosure can obviously be implemented in many other ways different from those described herein. Those skilled in the art can make similar extensions and derivations based on actual application situations without departing from the spirit of the present disclosure. Therefore, the scope of protection of the present disclosure should not be limited by the content of this specific embodiment.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this disclosure; the terms “comprising” and “having”, and any variations thereof, in the specification, claims and foregoing description of the drawings of this disclosure are intended to cover non-exclusive inclusion.

[0023] like Figure 1 and Figure 2 As shown, this disclosure provides a steam-water separator assembly, which mainly includes a primary separator 1 and a cyclone separator 2.

[0024] Among them, the primary separator 1 is the first-stage separation component of the steam-water separation device in the steam generator. It is installed inside the steam generator and is used to remove large-diameter water droplets entrained in the steam.

[0025] Cyclone separator 2 is a second-stage separation component added to the top of the existing primary separator 1. It further separates the residual fine water droplets in the steam through swirling action to improve the overall steam-water separation efficiency.

[0026] In one embodiment, the cyclone separator 2 has an internal cavity facing the primary separator 1, and a positioning sleeve 21 is vertically fixed in the internal cavity. It should be noted that the positioning sleeve 21 is coaxially arranged with the cyclone separator 2, and the positioning sleeve 21 has a through hole along its axial direction.

[0027] The cyclone separator 2 disclosed herein is connected to the primary separator 1 by a fastening bolt 3. The fastening bolt 3 passes through the inner hole of the positioning sleeve 21, and the inner wall of the positioning sleeve 21 is clearance-fitted with the rod of the fastening bolt 3.

[0028] Specifically, the fastening bolt 3 passes through the positioning sleeve 21 and securely connects the cyclone separator 2 to the top of the primary separator 1. The positioning sleeve 21 extends vertically within the internal cavity of the cyclone separator 2, with its bottom end near the bottom opening of the cyclone separator 2 and its top end extending upwards to the upper region of the internal cavity of the cyclone separator 2. The outer wall of the positioning sleeve 21 is welded and fixed to the inner wall of the cyclone separator 2 by stiffening plates 23, forming an integrated structure between the positioning sleeve 21 and the cyclone separator 2. The stiffening plates 23 extend axially along the positioning sleeve 21 and are distributed circumferentially to ensure the stable positioning of the positioning sleeve 21 inside the cyclone separator 2.

[0029] Because the inner wall of the positioning sleeve 21 has a clearance fit with the shank of the fastening bolt 3, when the steam-water mixture passes through the internal cavity of the cyclone separator 2 at high speed, airflow impact and equipment vibration are generated, and the lateral alternating load is first applied to the positioning sleeve 21. As a support, the positioning sleeve 21 can withstand and decompose the lateral shear stress, restrict the lateral displacement of the fastening bolt 3, and make the fastening bolt 3 mainly bear the axial tensile preload, thereby avoiding lateral bending fatigue fracture of the fastening bolt 3 during vibration.

[0030] Moreover, the inner hole of the positioning sleeve 21 forms an installation guide channel for the fastening bolt 3. When assembling the steam-water separation component in the narrow installation space inside the steam generator, the fastening bolt 3 can be quickly and accurately aligned simply by inserting it along the inner wall of the positioning sleeve 21, which significantly improves assembly efficiency.

[0031] In addition, the fastening structure is integrated into the cyclone separator 2, which occupies little radial space and does not require a large protruding flange on the outside, thereby maintaining the smoothness of the steam flow channel and reducing unnecessary airflow eddies and pressure loss.

[0032] In one implementation, such as Figure 1 As shown, the primary separator 1 has a recessed platform 11 on its top. The recessed platform 11 is a boss structure fixed to the top of the primary separator 1, and a limiting hole 111 is formed inside it. The bolt head of the fastening bolt 3 is placed upside down in the limiting hole 111, that is, the bolt head is placed downward and the bolt shank is placed upward in the recessed platform 11. The top end of the fastening bolt 3 passes through the inner hole of the positioning sleeve 21 and extends upward, and the cyclone separator 2 is fastened to the top of the primary separator 1 by the locking nut 4.

[0033] Specifically, the primary separator 1 has a mounting plate 12 on its top, which is welded and fixed to the top wall of the primary separator 1. The bottom end of the recessed platform 11 is welded to the mounting plate 12, so that the recessed platform 11 is fixedly connected to the primary separator 1 through the mounting plate 12.

[0034] Optionally, the mounting plate 12 is a flat plate structure, with its upper surface flush with or slightly higher than the top wall of the primary separator 1, providing a flat welding reference surface for the sinking platform 11 and ensuring the verticality and positional accuracy of the sinking platform 11 after installation.

[0035] The limiting hole 111 is formed inside the recessed platform 11 and is a through hole structure that penetrates the recessed platform 11 vertically. The limiting hole 111 adopts a two-section structure, with a polygonal hole in the lower section and a circular hole in the upper section. The diameter of the inscribed circle of the polygonal hole is slightly larger than the distance between opposite sides of the bolt head of the fastening bolt 3, and the height of the polygonal hole is greater than the height of the bolt head of the fastening bolt 3, so that the inverted hexagonal bolt head can be completely accommodated in the polygonal hole, and the outer contour of the bolt head corresponds to the circumferential contour dimension of the limiting hole 111.

[0036] When the bolt head of the fastening bolt 3 is inserted into the polygonal hole, the hole wall of the polygonal hole fits against the side edge of the bolt head, thereby restricting the rotational freedom of the fastening bolt 3 in the circumferential direction and achieving anti-rotation positioning.

[0037] The diameter of the upper circular hole is slightly larger than the major diameter of the shank of the fastening bolt 3, so that the shank of the fastening bolt 3 can pass through smoothly. At the same time, the diameter of the upper circular hole is smaller than the outer diameter of the bolt head of the fastening bolt 3, to prevent the bolt head from coming out from above.

[0038] During installation, first place the fastening bolt 3 upside down on top of the primary separator 1, with the bolt head facing down and the bolt shank facing up. Then, slide the countersunk plate 11 over the fastening bolt 3, with the lower polygonal hole of the limiting hole 111 of the countersunk plate 11 facing down, so that the bolt head of the fastening bolt 3 enters the polygonal hole from bottom to top.

[0039] After placement, the bolt head of the fastening bolt 3 is fully accommodated in the polygonal hole, with the hole wall fitting against the side edge of the bolt head, restricting the circumferential rotation of the fastening bolt 3. At this point, the mounting plate 12 is welded to the corresponding position on the top wall of the primary separator 1, and the bottom end of the recessed platform 11 is welded to the mounting plate 12, making the recessed platform 11 vertically fixed to the top of the primary separator 1. The lower end of the fastening bolt 3 is fixed to the top of the primary separator 1 via the recessed platform 11.

[0040] Because the diameter of the upper section of the limiting hole 111 is smaller than the outer diameter of the bolt head of the fastening bolt 3, the bolt head cannot be dislodged from above, thus achieving reliable positioning. The positioning sleeve 21 is pre-welded into the internal cavity of the cyclone separator 2. The cyclone separator 2 is hoisted above the primary separator 1, aligning the inner hole of the positioning sleeve 21 with the upper section of the round hole of the countersunk platform 11. The shank of the fastening bolt 3 slides upward along the inner wall of the positioning sleeve 21, achieving rapid alignment. The top of the fastening bolt 3 passes through the inner hole of the positioning sleeve 21 and extends upward. The locking nut 4 is tightened at the top of the positioning sleeve 21 to securely connect the cyclone separator 2 to the top of the primary separator 1.

[0041] Furthermore, the tightening direction of the locking nut 4 is designed to be the same as the rotation direction of the steam-water mixture inside the cyclone separator 2. When the cyclone separator 2 is working, the steam-water mixture entering from the bottom rotates and rises in the same direction, and the resulting tangential scouring force acts on the locking nut 4. Since the tightening direction of the locking nut 4 is consistent with this rotation direction, the rotational scouring of the steam-water mixture will not cause the locking nut 4 to loosen, but will instead make it tend to tighten further, achieving a self-tightening and anti-loosening effect by utilizing the cyclone direction of the flow field.

[0042] like Figure 2As shown, in another embodiment, the primary separator 1 is provided with a threaded sleeve 13 at its top. The threaded sleeve 13 is a cylindrical structure vertically fixed to the top of the primary separator 1, and its inner wall is machined with internal threads that mate with the fastening bolt 3. The outer wall of the threaded sleeve 13 can also be welded to the top of the primary separator 1 by connecting ribs. After the fastening bolt 3 passes through the inner hole of the positioning sleeve 21 from above, its bottom end is directly screwed into the internal thread of the threaded sleeve 13 to achieve threaded connection locking, without the need for an additional locking nut 4.

[0043] Specifically, the internal thread direction of the threaded sleeve 13 matches the external thread direction of the fastening bolt 3. The top surface of the threaded sleeve 13 is not higher than the bottom surface of the cyclone separator 2. That is, when the cyclone separator 2 is installed on top of the primary separator 1, the threaded sleeve 13 is completely located inside the connection area at the bottom of the cyclone separator 2, without protruding from the flow channel, thus avoiding interference with the flow field. The axial length of the threaded sleeve 13 is designed according to the screw-in depth requirement of the fastening bolt 3, ensuring that the fastening bolt 3 has sufficient thread engagement length after screwing in to guarantee the connection strength.

[0044] During installation, first, pre-weld the threaded sleeve 13 to the corresponding position on the top of the primary separator 1. Then, hoist the cyclone separator 2, pre-welded with the positioning sleeve 21, above the primary separator 1, aligning the inner hole of the positioning sleeve 21 with the threaded sleeve 13. Insert the fastening bolt 3 through the top opening of the positioning sleeve 21, sliding it down the inner wall of the positioning sleeve 21. Once the bottom of the bolt reaches the threaded sleeve 13, use a tool to rotate the fastening bolt 3 to screw it into the internal thread of the threaded sleeve 13.

[0045] After the fastening bolts 3 are fully tightened, the cyclone separator 2 is securely connected to the top of the primary separator 1. Since the locking nut 4 is omitted, the connection structure of this embodiment is simpler, the installation steps are reduced, and the bolt head is located on the top of the positioning sleeve 21, which facilitates the tightening operation using tools.

[0046] Similarly, the tightening direction of the fastening bolt 3 is designed to be the same as the rotation direction of the steam-water mixture inside the cyclone separator 2. The tangential force generated by the rotation of the steam-water mixture inside the cyclone separator 2 acts on the bolt head of the fastening bolt 3. Since the tightening direction is consistent with the rotation direction, the tangential force makes the fastening bolt 3 tend to tighten further rather than loosen, thus achieving self-tightening and anti-loosening.

[0047] Furthermore, such as Figure 1 and Figure 2 As shown, the top of the positioning sleeve 21 is also provided with a cap 22. The cap 22 covers the top of the fastening bolt 3, or covers... Figure 1 The tip portion of the locking nut 4 and fastening bolt 3 protruding as shown. Alternatively, it can cover... Figure 2 The bolt head of the fastening bolt 3 shown.

[0048] Optionally, the top of the cap 22 has a smooth curved surface to reduce eddies and flow resistance generated when the soda mixture flows through the top of the positioning sleeve 21, thus maintaining the smoothness of the flow field.

[0049] In one embodiment, the cap 22 is welded to the cyclone separator 2.

[0050] Specifically, the bottom opening of the cap 22 is fitted onto the outer side of the top of the positioning sleeve 21, and the lower edge of the outer wall of the cap 22 is welded to the outer wall of the positioning sleeve 21 or the inner wall of the cyclone separator 2, so that the cap 22 is securely covered at the top opening of the positioning sleeve 21.

[0051] The wall thickness of the cap 22 can be determined according to the pressure requirements, and the radius of curvature of its smooth surface is optimized according to the flow characteristics of the internal flow field of the cyclone separator 2 in order to minimize flow field interference.

[0052] This disclosure, by providing a cap 22, completely conceals the top of the fastening bolt 3 and the locking nut 4 or bolt head inside the cap 22, preventing direct exposure to the scouring environment of the two-phase flow of steam and water. This effectively avoids scouring wear and stress corrosion on the top of the fasteners, extending the service life of the connection structure. Simultaneously, the welding between the cap 22 and the positioning sleeve 21 is a sealing weld, thereby preventing the steam-water mixture from seeping into the interior of the cap 22 and preventing fastener corrosion.

[0053] Furthermore, the inner hole of the positioning sleeve 21 is divided into an upper guide hole 211 and a lower mating hole 212 along its axial direction. The inner diameter of the upper guide hole 211 is larger than the outer diameter of the shank of the fastening bolt 3, forming a loose guide clearance, so that the fastening bolt 3 can smoothly enter the inner hole of the positioning sleeve 21 without jamming when inserted.

[0054] The inner diameter of the lower section mating hole 212 is clearance-fitted with the outer diameter of the shank of the fastening bolt 3. That is, the inner diameter of the lower section mating hole 212 is slightly larger than the major diameter of the shank of the fastening bolt 3, so that a small gap is formed between the shank of the fastening bolt 3 and the inner wall of the lower section mating hole 212.

[0055] The clearance amount can be determined comprehensively based on the requirements of transverse shear and wear resistance. If the clearance is too small, assembly will be difficult and jamming will easily occur; if the clearance is too large, the shear limiting effect will be weakened. The upper guide hole 211 and the lower mating hole 212 are connected by a tapered transition surface, so that the inner hole cross section smoothly narrows from the upper large diameter to the lower small diameter, guiding the fastening bolt 3 to naturally transition from the loose guide section to the precision mating section.

[0056] During the assembly process (such as...) Figure 2As shown), the fastening bolt 3 first enters the upper guide hole 211. Due to the large guide clearance, the fastening bolt 3 can be easily inserted without precise alignment, achieving initial positioning. As the fastening bolt 3 continues to be inserted downwards, the conical transition section guides the shank of the fastening bolt 3 to gradually enter the lower mating hole 212. Due to the clearance fit between the lower mating hole 212 and the shank of the fastening bolt 3, the fastening bolt 3 is finally precisely positioned on the axis of the positioning sleeve 21.

[0057] This variable-diameter structure balances assembly efficiency and load-bearing accuracy: the upper guide hole 211 reduces the requirements for insertion accuracy, adapting to assembly operations under conditions of poor visibility in the narrow space inside the steam generator. Meanwhile, the lower mating hole 212 ensures a clearance fit between the fastening bolt 3 and the positioning sleeve 21 after it is in place, enabling the positioning sleeve 21 to effectively withstand lateral shear stress and limit the lateral displacement of the fastening bolt 3.

[0058] In the description of the embodiments of this disclosure, unless otherwise expressly specified and limited, the technical terms such as "installation", "connection", "joining", and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can also refer to a mechanical connection. For those skilled in the art, the specific meaning of the above terms in the embodiments of this disclosure can be understood according to the specific circumstances.

[0059] This disclosure uses specific terms to describe embodiments of the present disclosure. Terms such as "an embodiment," "one embodiment," and / or "some embodiments" refer to a particular feature, structure, or characteristic associated with at least one embodiment of the present disclosure. Therefore, it should be emphasized and noted that references to "an embodiment," "one embodiment," or "an alternative embodiment" in different locations throughout this specification do not necessarily refer to the same embodiment. Furthermore, certain features, structures, or characteristics in one or more embodiments of the present disclosure can be appropriately combined.

[0060] While this disclosure has described above with reference to preferred embodiments, it is not intended to limit the scope of this disclosure. Any changes and modifications can be made by those skilled in the art without departing from the spirit and scope of this disclosure. Therefore, any modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this disclosure, without departing from the content of the technical solution, fall within the protection scope defined by the claims of this disclosure.

Claims

1. A steam-water separator assembly, characterized in that, include: Primary separator and cyclone separator; A positioning sleeve is vertically fixed in the internal cavity of the cyclone separator, and the cyclone separator is connected to the primary separator by fastening bolts; The fastening bolt passes through the inner hole of the positioning sleeve, and the inner wall of the positioning sleeve is clearance-fitted with the shank of the fastening bolt. After passing through the positioning sleeve, the fastening bolt securely connects the cyclone separator to the top of the primary separator.

2. The steam-water separator assembly according to claim 1, characterized in that, The primary separator is provided with a recessed platform at the top, and a limiting hole is provided in the recessed platform. The bolt head of the fastening bolt is placed upside down in the limiting hole. The top of the fastening bolt extends through the positioning sleeve and is used to fasten the cyclone separator to the top of the primary separator by means of a locking nut.

3. The steam-water separator assembly according to claim 2, characterized in that, The limiting hole is a polygonal hole, and the outer contour of the bolt head corresponds to the circumferential contour dimension of the limiting hole.

4. The steam-water separator assembly according to claim 2, characterized in that, The tightening direction of the locking nut is the same as the rotation direction of the steam-water mixture inside the cyclone separator.

5. The steam-water separator assembly according to claim 2, characterized in that, The primary separator is provided with a mounting plate on top, and the bottom end of the sink is welded to the mounting plate.

6. The steam-water separator assembly according to claim 1, characterized in that, The primary separator is provided with a threaded sleeve at the top. The threaded sleeve has an internal thread that mates with the fastening bolt. After the fastening bolt passes through the positioning sleeve, it is threadedly connected and locked to the threaded sleeve.

7. The steam-water separator assembly according to claim 6, characterized in that, The tightening direction of the fastening bolts is the same as the rotation direction of the steam-water mixture inside the cyclone separator.

8. The steam-water separator assembly according to claim 1, characterized in that, The top of the positioning sleeve is also provided with a cap, which covers the top of the fastening bolt; The top of the cap has a smooth curved surface.

9. The steam-water separator assembly according to claim 8, characterized in that, The cap is welded to the cyclone separator.

10. The steam-water separator assembly according to claim 1, characterized in that, The inner hole of the positioning sleeve is divided into an upper guide hole and a lower mating hole along its axial direction; The inner diameter of the upper guide hole is larger than the outer diameter of the shank of the fastening bolt, and the inner diameter of the lower mating hole is clearance-fitted with the outer diameter of the shank of the fastening bolt. The upper guide hole and the lower mating hole are connected by a tapered transition.

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