Sectional autoclave

Abstract

The utility model discloses a sectional type steaming and pressure still relates to pressure vessel manufacturing technical field. The device includes cauldron body, cauldron cover and connecting flange, and cauldron body is the sectional structure of connection or split through connecting flange, at least two sections, and is equipped with cauldron cover at both ends, connecting flange is composed of first connecting section and second connecting section, and both weld with sectional cauldron fixed, and are fastened through the bolt of the connecting hole on the connecting seat, and the splicing place and the flange and cauldron combination place all are equipped with high temperature graphite winding sealing pad, and cauldron cover is welded in the both ends of cauldron body after assembling. The utility model adopts modularization sectional design, and the on -the -spot welding is replaced by flange connection, solves the problem that the overall type steaming and pressure still transport size is over limit, and the installation period is long, and the double -walled sealing structure ensures the leakproofness under high temperature and high pressure working condition, is applicable to the scene of export transportation and site limited, can significantly reduce manufacturing cost and shorten the installation time.

Description

Technical Field

[0001] This utility model belongs to the field of pressure vessel manufacturing technology and relates to a segmented autoclave. Background Technology

[0002] Autoclaves, as large pressure vessels, are widely used in high-temperature and high-pressure processing in building materials, chemical industries, and other fields. Currently, autoclaves mostly adopt an integral structural design, with the main body welded in the factory before shipment. However, this traditional integral structure has significant drawbacks: firstly, the autoclave, after being welded as a whole, is enormous, far exceeding conventional transportation limits, posing significant difficulties, especially in export shipments; secondly, the excessive weight also greatly increases the difficulty and cost of on-site hoisting. If on-site welding and assembly is used, the welding quality is difficult to guarantee due to the influence of the construction environment, and additional on-site flaw detection and hydrostatic testing are required, significantly extending the installation period. Furthermore, the additional costs of these on-site procedures further increase manufacturing costs. These problems are particularly prominent in the production and application of large autoclaves, severely restricting the promotion and efficiency of the equipment.

[0003] A portable autoclave flange, patent publication number CN206786179U, includes a first flange and a second flange. A connecting block is integrally formed on the lower surface of the first flange. A connecting groove adapted to the connecting block is formed on the upper surface of the second flange. A shaft hole communicating with the connecting groove is formed inside the connecting block. Slots are formed on both sides of the lower surface of the connecting block. A limiting groove communicating with one side of the slot is formed. The bottom of the limiting groove is a sealing structure, and the width of the limiting groove is smaller than the width of the slot. A locking block adapted to the length of the slot is fixedly connected to the inner wall of the connecting groove. This invention allows for a tighter connection between flanges, thus improving the sealing performance of the equipment. Furthermore, the sealing gasket can reduce wear between the first and second flanges, extending the service life of the flanges. The reinforcing rib structure enhances the mechanical strength of the flange body, making the flange less susceptible to damage. The aforementioned device uses a first flange that engages with a connecting block at the bottom of the second flange via a connecting groove, and a locking mechanism that engages with the locking block via a locking groove, to achieve pre-positioning and circumferential limiting, preventing relative rotation or misalignment of the flanges. However, this approach cannot ensure the sealing performance of the autoclave and also hinders the assembly of the autoclave. Therefore, those skilled in the art urgently need to solve the aforementioned technical problems. Utility Model Content

[0004] To address the aforementioned problems and deficiencies, this invention improves the ease of assembly and sealing of the autoclave.

[0005] To solve the above-mentioned technical problems, this utility model relates to a segmented autoclave, including an autoclave body, an autoclave cover, and a connecting flange; the autoclave body is a segmented structure that can be connected or separated by the connecting flange, the autoclave body includes at least two segments, and the autoclave cover is provided at both ends of the autoclave body; the connecting flange includes a first connecting segment and a second connecting segment, the first connecting segment and the second connecting segment are respectively installed on the autoclave body and connected together by bolts.

[0006] By adopting the above technical solution, and using a segmented structure with connecting flanges for disassembly or connection, and securing the first and second connecting sections respectively installed on the vessel body with bolts, the core advantage of this assembly relationship is that it enables modular disassembly and assembly of the vessel body. Compared to an integral structure, the segmented design can significantly reduce the size and weight of each segment during transportation, solving the problems of exceeding transport limits and difficulties in hoisting. At the same time, bolted connections replace on-site welding, avoiding welding quality risks and the additional costs of subsequent flaw detection and hydrostatic testing, and significantly shortening the on-site installation cycle.

[0007] Furthermore, the lid is directly welded to both ends of the assembled vessel body.

[0008] By adopting the above technical solution, the autoclave lid is directly welded to both ends of the assembled autoclave body. The advantage of this positional relationship is that it ensures the overall sealing performance and structural strength of the autoclave body. As the end sealing component of the autoclave, the welded fixation of the autoclave lid eliminates the risk of gap leakage that may occur with detachable connections, which is especially suitable for high temperature and high pressure conditions. At the same time, welding the autoclave lid after the autoclave body is assembled in sections can avoid damage to the autoclave lid during section transportation and ensure the machining accuracy of the end sealing surface.

[0009] Furthermore, the first connecting segment and the second connecting segment are connected together by bolts, and a sealing gasket is provided at the joint between the first connecting segment and the second connecting segment.

[0010] By adopting the above technical solution, the first connecting section and the second connecting section are connected by bolts, and a sealing gasket is set at the splice. The advantage of this assembly relationship is that it balances connection reliability and sealing performance. The bolt connection enables quick assembly and disassembly of the segmented autoclave body, which is convenient for transportation and maintenance; the sealing gasket is squeezed between the splice surfaces, which can effectively prevent leakage of high temperature and high pressure media, solve the problem of easy leakage in rigid contact of traditional flange connection, and adapt to the harsh working environment of autoclave.

[0011] Furthermore, both ends of the first connecting segment and the second connecting segment are provided with connecting seats, and the first connecting segment and the second connecting segment are connected together through the connecting seats.

[0012] By adopting the above technical solution, connecting seats are provided at both ends of the first and second connecting sections, and the connection is achieved through the connecting seats. The advantages of this structure are: improving the uniformity and stability of the stress at the connection point. The connecting seats provide a rigid support interface for the bolt connection, avoiding stress concentration caused by the bolts acting directly on the thin-walled structure of the vessel body; at the same time, the symmetrical design of the connecting seats ensures the coaxiality of the two vessel sections when they are joined, reducing the risk of sealing failure caused by assembly misalignment.

[0013] Furthermore, each of the connecting seats is provided with a connecting hole, through which the first connecting segment and the second connecting segment can be connected or separated by passing a bolt through the connecting hole.

[0014] By adopting the above technical solution, connection holes are opened on the connector, and bolts are passed through the connection holes to achieve connection or disassembly. The advantages of this positional relationship are: precise positioning and efficient assembly and disassembly. The uniform distribution design of the connection holes ensures that the bolt tightening force is evenly distributed along the flange circumference, avoiding deformation caused by local overload; at the same time, the standardized connection hole positions facilitate quick alignment and installation, simplify on-site operation procedures, and shorten assembly time.

[0015] Furthermore, the connecting flange is a long-neck welding flange, the sealing gasket is a high-temperature graphite spiral wound gasket, and the sealing gasket is disposed at the splice of the first connecting section and the second connecting section, as well as at the splice of the connecting flange and the vessel body.

[0016] By adopting the above technical solution, a long-neck weld neck flange is used for the connection, and a high-temperature graphite spiral wound gasket is used for the sealing gasket. These gaskets are placed at the joints of the connection sections and at the joints between the flange and the vessel body. The advantages of this design are: enhanced structural strength and adaptability to extreme working conditions. The long-neck weld neck flange is welded to the vessel body through a long-neck transition section, reducing welding stress concentration and improving the overall load-bearing capacity of the flange and vessel body. The high-temperature graphite spiral wound gasket has excellent temperature and pressure resistance, maintaining a stable seal under long-term high-temperature and high-pressure conditions in the autoclave. The double-joint sealing design further eliminates the risk of leakage.

[0017] The beneficial effects of this utility model are as follows:

[0018] 1. This utility model effectively reduces the size and weight of a single section by designing the autoclave body as a segmented structure of at least two sections and using connecting flanges to achieve modular disassembly and assembly. It solves the problems of oversized transport and difficult hoisting of integral autoclaves, and is particularly suitable for export transport and site-restricted scenarios.

[0019] 2. This utility model, by setting a sealing gasket at the splice of the first and second connecting sections of the connecting flange and cooperating with the evenly distributed bolts, not only realizes the quick assembly and disassembly of the segmented autoclave body, but also effectively prevents leakage of high temperature and high pressure media through the compression sealing of the sealing gasket, adapting to the harsh working environment of the autoclave and improving the sealing reliability.

[0020] 3. This utility model uses a long-neck welding flange as the connecting flange and welds it to the vessel body as a whole. The long neck transition section reduces welding stress concentration. At the same time, a sealing gasket is added at the joint between the connecting flange and the vessel body to form a double sealing structure, which significantly enhances the structural strength and adaptability to extreme working conditions of the connection part and extends the service life of the equipment.

[0021] 4. This utility model, by setting connecting seats with evenly distributed connecting holes at both ends of the connecting section, makes the bolt connection force evenly distributed along the flange circumference, avoiding deformation caused by local stress concentration. At the same time, the standardized connecting hole positions facilitate quick alignment and installation, simplifying the on-site operation process, greatly shortening the installation time, and improving disassembly and assembly efficiency. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0024] Figure 2 This is a schematic diagram of the connecting flange of this utility model;

[0025] Figure 3 This is a schematic diagram of the structure of the first connecting segment of this utility model;

[0026] Figure 4 This is a schematic diagram of the structure of the second connecting section of this utility model with bolts installed.

[0027] In the figure: 1-vessel body; 2-vessel cover; 3-connecting flange; 31-first connecting section; 32-second connecting section; 33-sealing gasket; 34-connecting seat; 35-connecting hole. Detailed Implementation

[0028] The present invention will now be described in further detail with reference to the accompanying drawings. Figure 1 , Figure 2 , Figure 3 and Figure 4As can be seen, the segmented autoclave disclosed in this utility model has an autoclave body 1 as the main structure, which is divided into two segments along the axial direction. Adjacent segments are detachably fixed by connecting flanges 3, forming a modular architecture that allows for independent segment manufacturing and rapid on-site assembly. The connecting flange 3, as a key connecting component, consists of a first connecting section 31 and a second connecting section 32. Both are fixed to the ends of the two autoclave body segments 1 by welding, and the welding part adopts a long-neck butt-welding flange structure. The long-neck transition section smoothly transitions to the outer wall of the autoclave body 1, ensuring uniform distribution of welding stress.

[0029] In the specific assembly of the connecting flange 3, annular connecting seats 34 are symmetrically arranged at both ends of the first connecting section 31 and the second connecting section 32. The connecting seats 34 extend circumferentially along the flange and are integrally formed with the connecting section body, providing a rigid support surface for bolt connection. The connecting seats 34 have 68 M36 bolt holes with evenly distributed connecting holes 35. After the bolts pass through the corresponding connecting holes 35, the two connecting sections are axially tightened to realize the splicing of the vessel body 1. To ensure sealing performance, annular sealing grooves are machined on the mating surfaces of the first connecting section 31 and the second connecting section 32, with high-temperature graphite spiral wound gaskets inside as sealing gaskets 33. When the bolts are tightened, the sealing gaskets 33 are compressed and fill the splicing gap, forming the first sealing barrier. At the same time, sealing gaskets 33 are also provided at the welded joint of the connecting flange 3 and the vessel body 1. The double sealing design prevents leakage of high-temperature and high-pressure media.

[0030] The vessel lid 2, as an end sealing component, is fixed to both ends of the assembled vessel body 1 by welding. The welding position is located at the junction of the end of the vessel body 1 and the flange face of the vessel lid 2. Before welding, it is necessary to ensure that the segments of the vessel body 1 have been aligned coaxially via the connecting flanges 3 to avoid tilting of the sealing surface of the vessel lid 2 due to assembly misalignment. After the overall assembly is completed, the segments of the vessel body 1 form a rigid whole through the connecting flanges 3. The symmetrical distribution of the connecting seats 34 ensures that the bolt tightening force is evenly transmitted to the vessel body 1 circumferentially. The precise positioning of the connecting holes 35 ensures the axis of the two segments of the vessel body 1. As the core connecting component, the connecting flange 3, with its long neck butt welding structure, the support of the connecting seats 34, the evenly distributed connecting holes 35, and the position of the double sealing gaskets 33, together constitute the key assembly features of the segmented autoclave.

[0031] In one embodiment, refer to Figure 1 , Figure 2 , Figure 3 and Figure 4As can be seen, in this segmented autoclave, the connection between the vessel body 1 and the connecting flange 3 is achieved through a combination of modular welding and bolt fastening. The vessel body 1 is divided into at least two independent units along the axial direction. The end of each segment of the vessel body 1 is fixed to the corresponding part of the connecting flange 3 by welding. The first connecting segment 31 is welded to the end of the first segment of the vessel body 1 as a whole, and the second connecting segment 32 is welded to the end of the second segment of the vessel body 1 as a whole. The welding part adopts a long-neck butt-welding flange structure, and the long-neck transition section smoothly transitions to the outer wall of the vessel body 1 to reduce welding stress concentration. At the end faces of the first connecting segment 31 and the second connecting segment 32 of the connecting flange 3, annular sealing grooves are respectively processed, and high-temperature graphite spiral wound gaskets are built in as sealing gaskets 33 to form a radial sealing interface.

[0032] At the axial connection level, annular connecting seats 34 are symmetrically arranged at both ends of the first connecting segment 31 and the second connecting segment 32. The connecting seats 34 are integrally formed with the connecting segment body, extending along the flange circumference and protruding outward, providing a rigid support surface for bolt connection. The connecting seats 34 have evenly distributed connecting holes 35. When the two vessel bodies 1 are joined, the connecting seats 34 of the first connecting segment 31 and the connecting seats 34 of the second connecting segment 32 are precisely aligned. After the bolts pass through the corresponding connecting holes 35, axial tightening is achieved, splicing the two vessel bodies 1 into a whole. At this time, the sealing gasket 33 is compressed between the splicing surfaces of the first connecting segment 31 and the second connecting segment 32, filling the gap and preventing leakage of high temperature and high pressure media. At the same time, the welding splice of the connecting flange 3 and the vessel body 1 is also provided with a sealing gasket 33, which further enhances the sealing performance through double sealing design.

[0033] Furthermore, the symmetrical distribution of the connecting seats 34 ensures that the bolt tightening force is uniformly transmitted along the circumference of the vessel body 1, avoiding structural deformation caused by local stress concentration; the standardized opening of the connecting holes 35 ensures the coaxiality when the two sections of the vessel body 1 are joined, ensuring the stability of the equipment during operation. After the overall assembly is completed, the vessel body 1 forms a rigid whole through the connecting flange 3. The long-neck butt-welded structure of the connecting flange 3 not only ensures the structural strength of the weld with the vessel body 1, but also realizes the segmented transportation and rapid on-site assembly of the vessel body 1 through modular design, allowing the overall splicing to be completed without on-site welding.

[0034] In one embodiment, refer to Figure 3 and Figure 4As can be seen, the sealing between the autoclave body 1 and the connecting flange 3 in this segmented autoclave is achieved through a double-sealing design. The connecting flange 3 consists of a first connecting section 31 and a second connecting section 32, with an annular sealing groove machined on their mating surfaces. A high-temperature graphite spiral wound gasket is installed inside as a sealing gasket 33, forming a radial sealing interface. Simultaneously, a sealing gasket 33 is also installed at the welded joint between the connecting flange 3 and the autoclave body 1, thus blocking the high-temperature and high-pressure medium through this double-sealing design. When the bolts are tightened through the connecting holes 35 of the connecting seat 34, the sealing gasket 33 is axially compressed. Its flexible graphite layer fills the joint gap, while the metal spiral wound skeleton ensures that the sealing gasket 33 does not undergo plastic deformation under extreme working conditions. Combined with the rigid support of the long-neck weld neck flange, a long-term stable seal is achieved.

[0035] The prefabricated segmented vessel body 1, including the welded connecting flange 3, is transported to the site. The first segment of vessel body 1 is hoisted onto the installation foundation and temporarily fixed using hoisting equipment. Then, the second segment of vessel body 1 is hoisted, and the first connecting section 31 and the second connecting section 32 are initially aligned through the positioning pin holes of the connecting flange 3, ensuring that the connecting holes 35 of the connecting seat 34 are coaxial. Next, the sealing gasket 33 is embedded in the sealing groove, and bolts are alternately inserted and pre-tightened along the circumference. The bolts are gradually tightened using a torque wrench according to the diagonal uniform principle, so that the compression of the sealing gasket 33 reaches the design value of about 2.5mm. Finally, the overall coaxiality is calibrated, and after confirming that there are no errors, the bolts are finally tightened to achieve a rigid connection between the two segments of vessel body 1. Finally, the vessel cover 2 is welded to both ends of the assembled vessel body 1 to form a complete sealed container.

[0036] Throughout the process, the symmetrical distribution of the connecting seats 34 ensures the balance of forces during hoisting and docking, while the evenly distributed connecting holes 35 ensure that the bolt tightening force is uniformly transmitted along the flange circumference. This not only avoids eccentric deformation during the hoisting of the segmented autoclave body 1, but also achieves zero-leakage sealing through the precise compression of the sealing gasket 33, making it suitable for the high-temperature and high-pressure working environment of the autoclave.

[0037] Working Principle: The working principle of this segmented autoclave is based on the synergistic effect of modular segmented design and rigid sealing connection. The autoclave body 1 is divided into at least two independent units along the axial direction. The ends of each segment of the autoclave body 1 are fixed to the corresponding parts of the connecting flange 3 by welding. The first connecting section 31 is welded to the first segment of the autoclave body 1, and the second connecting section 32 is welded to the second segment of the autoclave body 1, forming an integrated module of the autoclave body 1 and the connecting flange 3. During on-site assembly, bolts are inserted through the connecting holes 35 of the connecting seat 34 to axially tighten the first connecting section 31 and the second connecting section 32. At this time, the sealing gasket 33 (high-temperature graphite spiral wound gasket) at the splice is compressed, filling the butt gap and forming a radial seal. At the same time, a second sealing gasket 33 is set at the weld between the connecting flange 3 and the autoclave body 1, which, together with the rigid support of the long neck welding flange, achieves double sealing. During operation, the high-temperature and high-pressure medium reacts inside the autoclave body 1. The autoclave cover 2 is fixed to both ends of the assembled autoclave body 1 by welding, forming a sealed space together with the connecting flange 3 to ensure that the medium does not leak out.

[0038] By segmenting the autoclave body, the size and weight of each segment are reduced, avoiding the complex transportation approvals and high requirements for hoisting equipment caused by the over-limit conditions of the integral structure. Bolted connections replace on-site welding. The first connecting section 31 and the second connecting section 32 of the connecting flange 3 are rigidly connected by the connecting seat 34, avoiding the quality fluctuation risk of traditional welding processes and saving the additional costs of subsequent flaw detection and hydrostatic testing. The flexible sealing design of the sealing gasket 33 solves the leakage problem caused by thermal stress cracking of the welded joints of the integral autoclave. The high-temperature graphite winding material can withstand the long-term 180℃ and 1.3MPa conditions of the autoclave. The modular assembly process shortens the on-site installation time. The uniform distribution design of the connecting holes 35 ensures that the bolt tightening force is evenly distributed. With the prefabricated connecting flange 3, on-site operation is greatly simplified, which is particularly suitable for export transportation and site-restricted scenarios. In addition, the symmetrical structure of the connecting seat 34 ensures the coaxiality of the autoclave body 1 splicing, and the long neck welding flange reduces the concentration of welding stress, further improving the stability of equipment operation and fundamentally overcoming the inherent defects of the integral autoclave in the entire process of manufacturing, transportation and installation.

[0039] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various equivalent transformations can be made to the technical solution of the present invention, and all such equivalent transformations fall within the protection scope of the present invention.

Claims

1. A segmented autoclave, characterized in that, It includes a vessel body (1), a vessel cover (2), and a connecting flange (3); the vessel body (1) is a segmented structure that can be connected or separated by the connecting flange (3), the vessel body (1) includes at least two segments, and the vessel cover (2) is provided at both ends of the vessel body (1); the connecting flange (3) includes a first connecting segment (31) and a second connecting segment (32), the first connecting segment (31) and the second connecting segment (32) are respectively installed on the vessel body (1) and connected together by bolts.

2. The segmented autoclave according to claim 1, characterized in that, The lid (2) is directly welded to both ends of the assembled vessel body (1).

3. The segmented autoclave according to claim 1, characterized in that, The first connecting segment (31) and the second connecting segment (32) are connected together by bolts, and a sealing gasket (33) is provided at the splice of the first connecting segment (31) and the second connecting segment (32).

4. The segmented autoclave according to claim 2, characterized in that, Both ends of the first connecting segment (31) and the second connecting segment (32) are provided with connecting seats (34), and the first connecting segment (31) and the second connecting segment (32) are connected together through the connecting seats (34).

5. The segmented autoclave according to claim 4, characterized in that, Each of the connecting seats (34) is provided with a connecting hole (35). By passing the bolt through the connecting hole (35), the first connecting segment (31) and the second connecting segment (32) can be connected or separated.

6. The segmented autoclave according to claim 3, characterized in that, The connecting flange (3) is a long neck welding flange, the sealing gasket (33) is a high temperature graphite spiral wound gasket, and the sealing gasket (33) is set at the splice of the first connecting section (31) and the second connecting section (32), and at the splice of the connecting flange (3) and the vessel body (1).

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