Necking-down type steam distributing pocket and chemical equipment
By designing a constricted steam drum with constricted sections at both ends of the cylinder and sealing them with cover plate assemblies, the problem of easy cracking of the weld between the cylinder and the side plate was solved, achieving the effects of reducing costs and leakage, and improving steam quality and safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SENNICS CO LTD
- Filing Date
- 2025-05-20
- Publication Date
- 2026-04-24
AI Technical Summary
The existing steam distributor's welds between the cylinder and side plates are prone to cracking, leading to leaks, and require flaw detection steps, which increases costs.
A constricted steam distributor is designed with constricted sections at both ends of the cylinder, eliminating the side plate welds. It is sealed using a cover plate assembly and fixed by a locking mechanism, which facilitates maintenance and cleaning.
It reduces the risk of weld leakage, decreases the number of flaw detection steps, lowers costs, and improves steam quality and safety.
Smart Images
Figure CN224156856U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of steam distribution drum technology, and more specifically, to a narrow-mouth steam distribution drum and chemical equipment. Background Technology
[0002] Steam distributors (also known as steam generators or steam distribution boxes) are an important component of industrial steam systems, primarily used to evenly distribute high-pressure steam from the main steam pipeline to multiple branch pipelines. They are typically installed in the boiler room or at the starting point of the steam system to ensure a stable and uniform steam supply to all user terminals.
[0003] Steam distributors have functions such as steam distribution, pressure regulation, condensate separation, and safety protection. For containers that operate under high temperature and high pressure conditions, the connection methods between components are more demanding. Existing steam distributors include a cylinder and side plates welded to the end face of the cylinder. There are welds between the cylinder and the side plates, which need to be inspected after welding. Moreover, the welds are prone to cracking after a period of operation, causing leakage.
[0004] Therefore, this application is hereby submitted. Utility Model Content
[0005] The purpose of this utility model is to provide a narrow-mouth steam drum and chemical equipment, in which the two ends of the cylinder are not provided with side plates, so as to eliminate the weld between the cylinder and the side plates, omit the flaw detection step, reduce costs, and reduce the risk of steam leakage.
[0006] The embodiments of this utility model can be implemented as follows:
[0007] In a first aspect, the present invention provides a constricted steam distributor, including a cylindrical body and constricted sections disposed at both ends of the cylindrical body and integrally formed with the cylindrical body. The constricted sections include a constant diameter section and a first variable diameter section connected sequentially to the cylindrical body. Each first variable diameter section has a constriction at the end away from the constant diameter section. One constriction is connected to a steam inlet pipe, and the other constriction is provided with a cover plate assembly.
[0008] The cover plate assembly includes a necking ring welded and fixed to the necking opening, a necking cap extending into the necking opening and mating with the necking ring, and a pressure cap mating with the outer end face of the necking ring. It also includes a locking mechanism for connecting the necking cap and the pressure cap and adjusting the distance between the necking cap and the pressure cap to fix and lock the necking cap and the pressure cap in place.
[0009] A steam outlet pipe is connected to the top of the cylinder, and a drain outlet is connected to the bottom of the cylinder.
[0010] In an optional embodiment, the constricted cap is provided with a screw, the pressure cap is provided with a through hole for the screw to pass through, and a fastener is provided on the side of the pressure cap away from the constricted cap, the fastener being threadedly connected to the screw.
[0011] In an optional embodiment, the pressure cap includes a curved panel and a side plate disposed on the side of the curved panel and connected to the curved panel. The end face of the pressure cap near the constriction cap abuts against the constriction ring, and the curved panel gradually moves away from the constriction cap from both ends to the middle.
[0012] In an optional embodiment, a limiting platform is provided on the constricted cap, and a high-temperature resistant sealing material is wound on the limiting platform. The constricted ring abuts against the limiting platform of the constricted cap.
[0013] And / or, both the constriction ring and the constriction cap are elliptical in shape;
[0014] And / or, the cover is a one-piece molded structure, and the connection between the curved panel and the side panel is provided with rounded corners.
[0015] In an optional embodiment, the cover assembly includes two or more pressure caps, each of which is provided with a screw and a fastener.
[0016] In an optional embodiment, a second variable diameter section is further provided between the steam inlet pipe and the first variable diameter section. The second variable diameter section is connected to the first variable diameter section and has an angle of 30 to 35° with the axis of the cylinder, ensuring that it is 2 mm to 5 mm larger than the diameter of the steam inlet pipe, which facilitates its welding and assembly.
[0017] And / or, the first variable diameter section is provided with a variable diameter fillet.
[0018] In an optional embodiment, the length of the equal-diameter section along the axial direction of the cylinder is 100-150 mm;
[0019] And / or, along the axial direction of the cylinder, the length of the constricted section is 100–400 mm.
[0020] In an optional embodiment, a pressure gauge tube and a thermocouple tube are also provided above the cylinder.
[0021] In an optional embodiment, a corrugated plate steam-water separator is also provided inside the cylinder, and the corrugated plate steam-water separator is located directly below the steam outlet pipe.
[0022] Secondly, this utility model provides a chemical equipment, including the constricted steam distributor as described in any of the foregoing embodiments.
[0023] The beneficial effects of the constricted steam distributor and chemical equipment provided by this utility model embodiment include:
[0024] The constricted steam drum in this application has constricted sections at both ends of the cylinder. The constricted sections can eliminate the need for side plates at both ends of the cylinder, thereby eliminating the long weld between the side plates and the cylinder, omitting the flaw detection step, reducing costs, and reducing the risk of steam leakage.
[0025] The cover plate assembly in this application facilitates observation of whether scale has formed on the entire inner wall and internal components of the cylinder, so as to clean and drain it in a timely manner and improve steam quality. Attached Figure Description
[0026] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0027] Figure 1 A first-view structural schematic diagram of the narrowed steam distributor provided in this application;
[0028] Figure 2 This is a structural schematic diagram of the constricted steam distributor provided in this application from a second perspective.
[0029] Figure 3 This is a structural schematic diagram of the cover plate assembly provided in this application.
[0030] Icons: 100-Cylinder; 110-Steam outlet pipe; 120-Drain outlet; 130-Steam inlet pipe; 200-Narrowing section; 210-Equal diameter section; 220-First diameter changing section; 230-Second diameter changing section; 300-Cover plate assembly; 310-Narrowing ring; 320-Narrowing cover; 330-Pressure cap; 331-Bent panel; 332-Side plate; 340-Screw; 350-Fastener; 400-Corrugated plate steam-water separator. Detailed Implementation
[0031] In related technologies, the steam drum includes a cylinder 100 and a side plate welded to the end face of the cylinder 100. There is a weld between the cylinder 100 and the side plate, and the weld is relatively long. It is necessary to perform flaw detection after welding. Moreover, the weld is prone to cracking after a period of operation, which can cause leakage.
[0032] To address the aforementioned issues, this utility model provides a narrow-mouth steam distribution drum that does not have side plates, thereby eliminating the weld seam between the cylinder 100 and the side plates, omitting the flaw detection step, reducing costs, and minimizing the risk of leakage.
[0033] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0034] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.
[0035] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0036] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0037] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.
[0038] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.
[0039] This utility model embodiment provides a constricted steam distributor, such as... Figure 1-3 As shown, it includes a cylindrical body 100 and constricted sections 200 disposed at both ends of the cylindrical body 100 and integrally formed with the cylindrical body 100. The constricted sections 200 include a constant diameter section 210 and a first variable diameter section 220 connected sequentially to the cylindrical body 100. Each first variable diameter section 220 has a constriction at one end away from the constant diameter section 210. One constriction is connected to a steam inlet pipe 130, and the other constriction is provided with a cover plate assembly 300.
[0040] The cover plate assembly 300 includes a necking ring 310 welded and fixedly connected to the necking opening, a necking cap 320 extending into the necking opening and mating with the necking ring 310, and a pressure cap 330 mating with the outer end face of the necking ring 310. It also includes a locking mechanism for connecting the necking cap 320 and the pressure cap 330 and adjusting the distance between the necking cap 320 and the pressure cap 330 to fix and lock the necking cap 320 and the pressure cap 330.
[0041] A steam outlet pipe 110 is connected to the top of the cylinder 100, and a drain outlet 120 is connected to the bottom of the cylinder 100.
[0042] In this application, the constricted steam distributor has constricted sections 200 at both ends of the cylinder 100. The constricted sections 200 eliminate the need for side plates 332, thereby removing the weld between the side plates 332 and the cylinder 100, reducing costs and minimizing the risk of steam leakage. Furthermore, since the steam outlet pipe on the cylinder 100 needs to maintain a certain distance from the first diameter-changing section 220, a constant-diameter section 210 is also required on the side of the constricted section 200 closest to the cylinder 100. The length of the constant-diameter section 210 can be 100–150 mm. The cylinder 100, the constant-diameter section 210, and the first diameter-changing section 220 can be integrally formed.
[0043] In addition, one of the constricted openings in this application is connected to a steam inlet pipe 130, and the other constricted opening is not sealed, but is equipped with a detachable cover plate assembly 300. When the steam distributor needs to be inspected, the locking mechanism of the cover plate assembly 300 can be removed, so that the pressure cover 330, the constricted opening cover 320 and the constricted opening ring 310 can be separated. The internal condition of the steam distributor can be viewed and inspected through the constricted opening ring 310, so as to facilitate observation of whether the inner wall of the entire cylinder 100 and internal components are scaled, so as to clean and drain them in time and improve the steam quality.
[0044] It should be noted that there may be more than two steam outlet pipes in this application, including a main steam outlet pipe and an auxiliary steam outlet pipe, and the specific number can be set as needed; similarly, the number and position of the drain outlets 120 can also be set as needed. In addition, in order to support the steam outlet pipes, supports, such as saddle supports, can also be set at the bottom of the cylinder 100.
[0045] In an optional embodiment, the constricted cap 320 is provided with a screw 340, the pressure cap 330 is provided with a through hole for the screw 340 to pass through, and a fastener 350 is provided on the side of the pressure cap 330 away from the constricted cap 320, the fastener 350 being threadedly connected to the screw 340.
[0046] The fastener 350 can be a nut that is threadedly connected to the screw 340. The screw 340 is fixedly connected to the constriction cap or integrally formed. Specifically, during assembly, the constriction cap is first placed on the side of the constriction ring 310 near the cylinder 100, the pressure cap 330 is installed on the screw 340, and then the nut is threadedly connected to the screw 340 until the constriction cap 320 and the pressure cap 330 are locked.
[0047] In an optional embodiment, the pressure cap 330 includes a curved panel 331 and a side plate 332 disposed on the side of the curved panel 331 and connected to the curved panel 331. The end face of the pressure cap 330 near the constriction cap abuts against the constriction ring 310, and the curved panel 331 gradually moves away from the constriction cap 320 in the direction from both ends to the middle.
[0048] The pressure cap 330 includes a curved panel 331, which gradually moves away from the constricted cap 320 from both ends to the middle. This design prevents the curved panel 331 from deforming under long-term pressure from the constricted ring 310 and the nut, thus maintaining the locking force of the cover assembly 300 and preventing leakage at the location of the cover assembly 300. Furthermore, the side plate 332 is disposed on the side of the curved panel 331 and is fixed to or integrally formed with the curved panel 331, further improving the stability of the cover structure.
[0049] In an optional embodiment, a limiting platform is provided on the constriction cap. The limiting platform is annular and coaxially arranged with the constriction ring 310. High-temperature resistant sealing material is wound on the limiting platform. The constriction ring and the limiting platform of the constriction cap abut against each other to ensure the sealing effect of the cover assembly and prevent steam leakage.
[0050] In an optional embodiment, both the necking ring 310 and the necking cap 320 are elliptical; when it is necessary to install or remove the necking cap 320, the necking cap 320 can be rotated at a suitable angle to facilitate the passage of the necking cap 320 through the necking ring 310.
[0051] In an optional embodiment, the pressure cover 330 is an integrally formed structure, and the connection between the curved panel 331 and the side plate 332 is provided with rounded corners. The rounded corners are beneficial for dispersing stress and for avoiding the problem of easy deformation at the connection between the curved panel 331 and the side plate 332.
[0052] In an optional embodiment, the cover plate assembly 300 includes two or more pressure caps 330, each pressure cap 330 being provided with a screw 340 and a fastener 350. The number of pressure caps 330 assemblies is related to the size of the constriction. If the size of the constriction is large, the number of pressure caps 330 can be appropriately increased to achieve a seal; if the size of the constriction is small, fewer pressure caps 330 or even one pressure cap 330 can achieve a seal.
[0053] It should be noted that, in an optional embodiment, in order to ensure the sealing effect and prevent steam leakage, a high-temperature resistant sealing material is wound on the limiting platform of the shrinkage cap 320 and abuts against one end of the shrinkage ring 310 inside the shrinkage.
[0054] In an optional embodiment, a second diameter-changing section 230 is further provided between the steam inlet pipe 130 and the first diameter-changing section 220; since the diameter of the steam inlet pipe 130 is relatively small, the second diameter-changing section 230 is provided to accommodate the steam inlet pipe 130.
[0055] Because the steam inlet pipe has a relatively small diameter and is circular, a second diameter-changing section 230 is provided during the necking process of the cylinder 100 to accommodate the steam inlet pipe 130. However, the necking ring 310 of the cover plate assembly 300 is relatively large and elliptical, so the second diameter-changing section 230 is not required during the necking process of the cylinder 100. The second diameter-changing section 230 connects to the first diameter-changing section 220, and its angle with the axis of the cylinder 100 is between 30° and 35°. Generally, when the cylinder diameter is ≤400mm, the cover plate assembly uses a manhole type B size of 88×102mm; when the cylinder diameter is ≥450mm, the cover plate assembly uses a manhole type B size of 300×400mm. Specific specifications and selections for manholes and handholes can be found in standard NB / T47040-2013 "Boiler Manholes and Handhole Devices".
[0056] In an optional embodiment, the first variable diameter section 220 is provided with a variable diameter fillet. The radius of the variable diameter fillet is related to the diameter of the steam distributor, and generally increases with the increase of the diameter of the cylinder 100. It is also related to the processing mold.
[0057] In an optional embodiment, the length of the equal diameter section 210 along the axial direction of the cylinder 100 is 100-150 mm;
[0058] And / or, along the axial direction of the cylinder 100, the length of the constricted section 200 is 100-400mm. The length of the constricted section 200 increases with the increase of the diameter of the cylinder 100, and is also related to the processing mold.
[0059] In an optional embodiment, a pressure gauge tube and a thermocouple tube are also provided above the cylinder 100.
[0060] In an optional embodiment, a corrugated plate steam-water separator 400 is also provided inside the cylinder 100. The corrugated plate steam-water separator 400 is located directly below the steam outlet pipe 110. The corrugated plate steam-water separator has the advantages of low resistance, high separation efficiency, and avoidance of water film rupture and secondary entrainment. It is made of carbon steel sheet and is evenly arranged in the steam distribution drum. The interval between two corrugated plates is generally set between 10 and 50 mm, which is beneficial to improving steam quality and preventing steam from carrying water.
[0061] In addition, the steam inlet pipe of the steam distributor is located on one side of the cylinder, which facilitates the steam to enter the corrugated plate steam-water separator for steam-water filtration and separation. At the same time, it can prevent the steam from constantly impacting the area below the steam inlet pipe of the cylinder, reducing stress concentration in that area.
[0062] This utility model embodiment also provides a chemical equipment, including the constricted steam distributor as described in any of the foregoing embodiments.
[0063] The above description is only a specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model should be included within the protection scope of the present utility model.
Claims
1. A contracting header characterized by, It includes a cylindrical body and constricted sections disposed at both ends of the cylindrical body and integrally formed with the cylindrical body. The constricted sections include a constant diameter section and a first variable diameter section connected in sequence to the cylindrical body. Each first variable diameter section has a constriction at the end away from the constant diameter section. One constriction is connected to a steam inlet pipe, and the other constriction is provided with a cover plate assembly. The cover plate assembly includes a necking ring welded and fixed to the necking opening, a necking cap extending into the necking opening and mating with the necking ring, and a pressure cap mating with the outer end face of the necking ring. It also includes a locking mechanism for connecting the necking cap and the pressure cap and adjusting the distance between the necking cap and the pressure cap to fix and lock the necking cap and the pressure cap in place. A steam outlet pipe is connected to the top of the cylinder, and a drain outlet is connected to the bottom of the cylinder.
2. The constricted-neck steam distributor according to claim 1, characterized in that, The constricted cap is provided with a screw, the pressure cap is provided with a through hole for the screw to pass through, and a fastener is provided on the side of the pressure cap away from the constricted cap, the fastener being threadedly connected to the screw.
3. The contracting header of claim 1, wherein, The pressure cap includes a curved panel and a side plate disposed on the side of the curved panel and connected to the curved panel. The end face of the pressure cap near the constriction cap abuts against the constriction ring, and the curved panel gradually moves away from the constriction cap from both ends to the middle.
4. The contracting header of claim 3, wherein, The constriction cap is provided with a limiting platform, and a high-temperature resistant sealing material is wound on the limiting platform. The constriction ring abuts against the limiting platform of the constriction cap. And / or, both the constriction ring and the constriction cap are elliptical in shape; And / or, the cover is a one-piece molded structure, and the connection between the curved panel and the side panel is provided with rounded corners.
5. The contracting header of claim 2, wherein, The cover plate assembly includes two or more pressure caps, each of which is provided with a screw and a fastener.
6. The constricted header as set forth in claim 1, wherein, A second diameter-changing section is also provided between the steam inlet pipe and the first diameter-changing section; And / or, the first variable diameter section is provided with a variable diameter fillet.
7. The constricted header as set forth in claim 1, wherein Along the axial direction of the cylinder, the length of the equal-diameter section is 100-150 mm; And / or, along the axial direction of the cylinder, the length of the constricted section is 100–400 mm.
8. The constricted header as set forth in claim 1, wherein, A pressure gauge tube and a thermocouple tube are also installed above the cylinder.
9. The constricted header as set forth in claim 1, wherein, The cylinder is also equipped with a corrugated plate steam-water separator, which is located directly below the steam outlet pipe.
10. A chemical plant, characterized by Includes the constricted steam distribution drum as described in any one of claims 1-9.