Supporting tool and supporting method for super-large pressure vessel

Abstract

The application relates to the technical field of pressure container manufacturing, and discloses a support tool and a support method for a super-large pressure container. The support tool comprises a center plate, a plurality of connecting pipes, a plurality of support pipes, a plurality of guide rings, a plurality of guide connecting pipes, a plurality of limiting nuts, a plurality of clamping plates and a plurality of clamping bolt assemblies. The two ends of the support pipes are fixed between two adjacent connecting pipes. The guide rings are in circular arc structures, and a plurality of groups of the guide rings are uniformly arranged along the circumference. The adjacent guide rings are locked and fixed through the clamping plates and the clamping bolt assemblies. The clamping plates are provided with connecting holes and arc-shaped connecting grooves. The clamping bolt assemblies are correspondingly matched with the connecting holes and the arc-shaped connecting grooves to realize adjustable fixing assembly of the adjacent guide rings. According to the above technical scheme, the tool can support pressure containers of different specifications in a small range, the universality of the tool is greatly improved, the tool adopts a modular split structure, the core main components can be repeatedly used, the equipment support construction cost is reduced, and resource waste is avoided.

Description

Technical Field

[0001] This invention relates to the field of pressure vessel manufacturing technology, and more specifically, to a support fixture and support method for an ultra-large pressure vessel. Background Technology

[0002] The crystallizer pressure vessel mainly consists of a corrugated jacket and a stirring and scraping blade assembly. During operation, the stirring and scraping blade rotates against the inner wall of the shell to uniformly remove deposits. To ensure the uniformity of scraping and operational stability, the inner wall of the equipment shell must meet strict flatness requirements: the flatness tolerance of the inner surface of the shell must be ≤0.4mm.

[0003] The circumferential and axial corrugations of the equipment shell are key indicators affecting the smooth rotation of the stirring scraper. Discontinuous structural defects such as protrusions and depressions on the inner wall directly interfere with the normal rotation of the stirring scraper, causing uneven scraping, scraper jamming, and equipment wear. For large crystallizer pressure vessels, the high-precision dimensional requirement of an inner wall flatness ≤0.4mm cannot be directly achieved through conventional rolling and welding processes; it is necessary to rely on shaping processes to correct inner wall defects.

[0004] When correcting internal wall defects, the pressure vessel's internal wall, which was originally compliant, can easily deform. Therefore, supporting fixtures and appropriate support methods are needed to support the pressure vessel. Currently, some supporting fixture structures exist; however, these fixtures are only compatible with a single pressure vessel specification, exhibiting poor versatility and low reuse rate. When production of a pressure vessel of the corresponding specification ceases, the supporting fixture is often scrapped, resulting in resource waste. Therefore, there is room for further improvement in the existing technology. Summary of the Invention

[0005] This invention aims to disclose and protect a support fixture and method for ultra-large pressure vessels, addressing the technical problems mentioned in the background art. This invention provides the following technical solution:

[0006] A support fixture for an ultra-large pressure vessel includes a center plate, several connecting pipes, several support pipes, several guide rings, several guide pipes, several limit nuts, several clamping plates, and several clamping bolt assemblies.

[0007] One end of the connecting pipe is fixedly installed on the side of the center plate, and a threaded hole is opened at the end of the connecting pipe away from the center plate;

[0008] The two ends of the support tube are respectively fixed between two adjacent connecting tubes;

[0009] One end of the guide tube is a threaded rod and the other end is a smooth rod. The threaded rod is threaded into the threaded hole. The limiting nut is threaded onto the threaded rod. The smooth rod is fixedly connected to the middle of the inner side of the guide ring.

[0010] The guide ring has an arc structure, and multiple sets of guide rings are evenly distributed along the circumference. Adjacent guide rings are locked and fixed together by clamping plates and clamping bolt assemblies. The clamping plates are provided with connecting holes and arc-shaped connecting grooves. The clamping bolt assemblies are respectively matched with the connecting holes and arc-shaped connecting grooves to realize the adjustable fixed assembly of adjacent guide rings.

[0011] The present invention further specifies that: the multiple connecting pipes are evenly distributed along the circumference of the central plate.

[0012] The present invention further specifies that the number of the connecting pipe, support pipe, guide ring, guide pipe and limiting nut is set to eight, and they are arranged in a one-to-one correspondence. The eight connecting pipes are evenly arranged within a 360° circumference outside the center plate.

[0013] The present invention further specifies that: the left and right sides of the guide ring are respectively provided with a first mounting hole and a second mounting hole, and clamping plates are provided on both sides of the docking position of two adjacent guide rings. The clamping bolt assembly is fixed by passing through the connecting hole of the clamping plate and the first mounting hole on one side, and the clamping bolt assembly is fixed by passing through the connecting groove of the clamping plate and the second mounting hole on the other side in an adjustable manner.

[0014] The present invention further specifies that the limiting nut is used to limit the screw-in depth of the guide tube.

[0015] The present invention further specifies that the support pipe and the adjacent connecting pipe are fixedly connected by welding.

[0016] The present invention further specifies that the guide tube's optical rod is fixedly connected to the inner side of the guide ring by welding.

[0017] A method for supporting an ultra-large pressure vessel includes the following steps:

[0018] S1. Adjust the super-large pressure vessel to be constructed into a horizontal position for construction.

[0019] S2. Insert the support fixture into the pressure vessel through one end opening, ensuring that the axial direction of the fixture is coaxial with that of the pressure vessel.

[0020] S3. Install multiple support fixtures coaxially in the axial direction of the pressure vessel, and use the roundness of the fixture rings to maintain the standard roundness of the inner wall of the pressure vessel.

[0021] S4. Construct the remaining parts of the pressure vessel under the support of the tooling ring;

[0022] S5. Continue until the entire pressure vessel is completed and the tooling ring is removed.

[0023] The present invention further specifies that adjacent supporting fixtures are staggered for support.

[0024] In summary, the present invention has the following beneficial effects:

[0025] (1) This tooling achieves adaptability and support for pressure vessels of different specifications within a small range, greatly improving the tooling's versatility. Through the threaded fit structure of the guide pipe and the connecting pipe, and with the help of the limit nut, the installation depth of the guide pipe can be precisely controlled, and the circumferential installation diameter of the guide ring can be flexibly adjusted. For different ultra-large pressure vessels with small diameter differences, it is not necessary to change the main structure of the tooling to achieve adaptability and support for the inner wall arc contour of multiple specifications of vessels. This breaks through the limitations of traditional support tooling with fixed dimensions and only able to adapt to a single type of pressure vessel, and has a wider range of applicable scenarios.

[0026] (2) This tooling adopts a modular split structure, and the core main components can be reused, reducing equipment support and construction costs and avoiding resource waste. This tooling divides the structure into reusable and replaceable components. The main frame of the tooling, consisting of the center plate, connecting pipe, and support pipe, can be reused for a long time. Only when facing pressure vessel support conditions with large size differences, it is necessary to replace the guide ring and guide pipe of the corresponding size to complete the adaptation. Compared with traditional support tooling, which suffers from the problem of the entire tooling being scrapped when a single specification of vessel is discontinued, this tooling greatly improves the utilization rate of components, reduces tooling customization and scrapping costs, and significantly improves economic efficiency.

[0027] (3) This fixture adopts a near-circular distributed support structure to achieve full circumferential support of the inner wall of the pressure vessel. Through the structural design of eight sets of guide rings evenly distributed around the 360° circumference, this fixture can simultaneously support the near-circular arc contour of the inner wall of the pressure vessel in one go; at the same time, the staggered arrangement of adjacent support fixtures compensates for the support gap position and improves the support effect.

[0028] (4) This tooling is equipped with a dedicated limit locking structure to prevent the guide ring used for support from rotating and causing jamming or displacement problems when the support tooling is installed and disassembled, by squeezing the inner wall of the container. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in this invention 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 some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0030] Figure 1A schematic diagram of the planar structure supporting the tooling;

[0031] Figure 2 A schematic diagram of the three-dimensional structure supporting the tooling;

[0032] Figure 3 A three-dimensional structural diagram of the central plate;

[0033] Figure 4 This is a three-dimensional structural diagram of the connecting pipe;

[0034] Figure 5 A three-dimensional structural diagram of the combined component of guide ring and guide tube;

[0035] Figure 6 A three-dimensional structural diagram of the combined components of the clamping plate and clamping bolt assembly.

[0036] Reference numerals: 1. Center plate; 2. Connecting pipe; 2-1. Mounting port; 2-2. Threaded hole; 3. Support pipe; 4. Guide ring; 4-1. First mounting hole; 4-2. Second mounting hole; 5. Guide pipe; 5-1. Smooth rod; 5-2. Threaded rod; 6. Limit nut; 7. Clamping plate; 7-1. Connecting hole; 7-2. Connecting groove; 8. Clamping bolt assembly. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0038] A support fixture for an ultra-large pressure vessel, with an overall support ring structure, is arranged in multiple sets along the axial direction of the pressure vessel. It is used to support the arcuate contour of the pressure vessel wall (the ideal inner wall of the pressure vessel cylinder is a standard circle). In this embodiment, combined with... Figure 1 and Figure 2 As shown, the support fixture includes a center plate 1, a connecting pipe 2, a support pipe 3, a guide ring 4, a guide pipe 5, a limit nut 6, a clamping plate 7, and a clamping bolt assembly 8.

[0039] In this embodiment, the number of center plates 1 is one;

[0040] The number of connecting pipes 2 is eight;

[0041] The number of support tubes 3 is eight;

[0042] The number of guide rings 4 is eight;

[0043] The number of guide pipes 5 is eight;

[0044] The number of limit nuts 6 is eight;

[0045] The number of clamps 7 is sixteen;

[0046] The number of clamping bolt assemblies 8 is sixteen.

[0047] Based on the number of parts in the examples above, the following section provides a detailed explanation of the structure of each part and the connections between them.

[0048] Combination Figures 3-6 As shown, the center plate 1 is circular in this embodiment, but can be any shape in other embodiments. The function of the center plate 1 is to fix the connecting pipes 2 together, and one end of each connecting pipe 2 is fixed to the center plate 1.

[0049] The connecting pipe 2 has an installation port 2-1 at one end for fixing to the center plate 1. The side of the center plate 1 is inserted into the installation port 2-1 to facilitate the fixing between the connecting pipe 2 and the center plate 1. In other embodiments, the fixing between the connecting pipe 2 and the center plate 1 can also adopt other connection and fixing methods in the prior art. The other end of the connecting pipe 2 has a threaded hole 2-2 for threaded installation of the guide pipe 5.

[0050] In this embodiment, there are a total of eight connecting pipes 2, which are evenly distributed within a 360° circumference.

[0051] The support pipe 3 is used to support the installation between adjacent connecting pipes 2, so both ends of the support pipe 3 are fixed to the two adjacent connecting pipes 2 respectively. In this embodiment, welding is used for fixing.

[0052] The guide ring 4 is arc-shaped and is used to contact the inner wall of the pressure vessel to provide standard roundness support for the arc contour of the pressure vessel wall. In this embodiment, there are eight guide rings 4 in total, which are evenly distributed within a 360° circumference. Each of the eight guide rings 4 corresponds to one of the eight connecting pipes 2, and there is a certain gap between adjacent guide rings 4 to facilitate installation. The guide rings 4 and the connecting pipes 2 are connected by guide pipes 5, which are fixed at the middle position of the inner arc of the guide ring 4. The guide pipes 5 and the guide rings 4 are welded together.

[0053] The guide tube 5 is welded and fixed to the guide ring 4 on one side as a smooth rod 5-1, and the guide tube 5 is connected to the connecting pipe 2 at the other end as a threaded rod 5-2. The threaded rod 5-2 is threaded into the threaded hole 2-2 reserved in the connecting pipe 2 to achieve detachable and adjustable installation.

[0054] The limiting nut 6 is threaded onto the threaded rod 5-2. By adjusting the installation position of the limiting nut 6 on the threaded rod 5-2, the installation depth of the guide tube 5 in the threaded hole 2-2 in the connecting pipe 2 can be controlled, thereby controlling the installation diameter of the guide ring 4 to be consistent with the outer diameter of the guide ring 4.

[0055] It is important to note here that when installing the guide ring 4, its installation diameter (i.e., installation position) should typically be perfectly aligned with its outer diameter. However, when this fixture is used to support the inner walls of pressure vessels of different sizes (where the diameters of the different sizes of pressure vessels differ only slightly) (i.e., the installation diameter of the guide ring 4 is not perfectly aligned with its outer diameter), this fixture can also be used based on a new support method. This is because, in the new support method, staggered support between adjacent fixtures not only fills the support gaps between the guide rings 4 but also allows adjacent support fixtures to compensate for the areas not effectively supported by other fixtures. For example, assuming that the effective support area of ​​the guide ring 4 for each fixture is only 40%, the remaining 60% is compensated by the effective support area of ​​other staggered support fixtures. Based on this, the guide ring 4 can be used to support the inner wall contours of multiple pressure vessels of different sizes within a certain range.

[0056] To facilitate the fixing of adjacent guide rings 4, a first mounting hole 4-1 and a second mounting hole 4-2 are respectively provided on the left and right sides of the guide ring 4.

[0057] The function of the clamping plate 7 and the clamping bolt assembly 8 is to connect and fix adjacent guide rings 4. The two clamping plates 7 are respectively clamped on both sides of the mating position of the two guide rings 4. The clamping plates 7 are provided with connecting holes 7-1 and connecting grooves 7-2. The clamping bolt assembly 8 is used to install one guide ring 4 through the connecting hole 7-1 and the first mounting hole 4-1, and the other clamping bolt assembly 8 is used to install the other guide ring 4 through the connecting groove and the second mounting hole 4-2.

[0058] The clamping plate 7 and the clamping bolt assembly 8 prevent the guide ring 4 from rotating about the guide tube 5, thus improving the ease of installation and disassembly during the support process. When the guide ring 4 rotates, it presses against the inner wall of the pressure vessel, causing it to jam and making it impossible to easily install and disassemble the support fixture.

[0059] It should be noted that the connecting groove 7 is arc-shaped. The purpose of the connecting groove 7-2 is to facilitate the movement of the clamping bolt assembly 8 within the connecting groove 7-2. The reason for facilitating the movement of the clamping bolt assembly 8 within the connecting groove 7-2 is that when the guide ring 4 needs to be adapted to support the inner wall contours of pressure vessels of different sizes, the installation diameter of the guide ring 4 needs to be adjusted. At this time, the gap between adjacent guide rings 4 will also change. Therefore, the connecting groove 7-2 facilitates the adjustment of the connection position of the clamping bolt assembly 8 to adapt to different support scenarios of this tooling.

[0060] The above is a detailed description of the structure of the support fixture of this patent. Finally, it should be noted that the guide ring 4 and guide pipe 5 in the support fixture of this patent can be used as replaceable components, and the center plate 1, connecting pipe 2, and support pipe 3 in the support fixture can be used as reusable components. That is, when it is necessary to support the arc contour of different pressure vessels with large size variations, the guide ring 4 and guide pipe 5 can be removed, and the combined component of center plate 1, connecting pipe 2, and support pipe 3 can be reused. Based on the reused combined component (center plate 1, connecting pipe 2, and support pipe 3), a new size guide ring 4 and guide pipe 5 can be selected to support other sizes of ultra-large pressure vessels. In other words, the support fixture of this patent supports the reuse of some components, avoiding resource waste.

[0061] In addition, the support function of this patent can support the entire circumferential arc contour that is close to complete in one go, which improves the convenience of measurement.

[0062] Finally, it should be noted that when the gap between adjacent guide rings 4 is large, a small portion of the inner wall of the pressure vessel will be unsupported. In this case, the entire tooling needs to be rotated within a certain angle, i.e., misaligned support, to complete the support of the entire circumferential contour.

[0063] A method for supporting an ultra-large pressure vessel includes the following steps:

[0064] S1. Position the pressure vessel to be constructed in a horizontal, ready-to-construction position.

[0065] S2. Place the tooling into the pressure vessel through an opening at one end, ensuring that the axial direction of the tooling is coaxial with the axial direction of the pressure vessel.

[0066] S3. Install multiple support fixtures coaxially in the axial direction of the pressure vessel, and use the roundness of the fixture rings to maintain the standard roundness of the inner wall of the pressure vessel.

[0067] S4. Construct the remaining parts of the pressure vessel under the support of the tooling ring;

[0068] S5. Continue until the entire pressure vessel is completed and the tooling ring is removed.

[0069] In the support method, it is important to note that adjacent support fixtures are staggered for support.

[0070] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A support fixture for an ultra-large pressure vessel, characterized in that: It includes a center plate, several connecting pipes, several supporting pipes, several guide rings, several guide pipes, several limit nuts, several clamping plates, and several clamping bolt assemblies; One end of the connecting pipe is fixedly installed on the side of the center plate, and a threaded hole is opened at the end of the connecting pipe away from the center plate; The two ends of the support tube are respectively fixed between two adjacent connecting tubes; One end of the guide tube is a threaded rod and the other end is a smooth rod. The threaded rod is threaded into the threaded hole. The limiting nut is threaded onto the threaded rod. The smooth rod is fixedly connected to the middle of the inner side of the guide ring. The guide ring has an arc structure, and multiple sets of guide rings are evenly distributed along the circumference. Adjacent guide rings are locked and fixed together by clamping plates and clamping bolt assemblies. The clamping plates are provided with connecting holes and arc-shaped connecting grooves. The clamping bolt assemblies are respectively matched with the connecting holes and arc-shaped connecting grooves to realize the adjustable fixed assembly of adjacent guide rings.

2. The support fixture for an ultra-large pressure vessel according to claim 1, characterized in that, The multiple connecting pipes are evenly distributed along the circumference of the central plate.

3. The support fixture for an ultra-large pressure vessel according to claim 1, characterized in that, The number of connecting pipes, support pipes, guide rings, guide pipes and limiting nuts is set to eight, and they are arranged in a one-to-one correspondence. The eight connecting pipes are evenly arranged within a 360° circumference outside the center plate.

4. The support fixture for an ultra-large pressure vessel according to claim 1, characterized in that, The guide ring has a first mounting hole and a second mounting hole on its left and right sides, respectively. A clamping plate is clamped on both sides of the docking position of two adjacent guide rings. The bolt assembly on one side is fixed by passing through the connecting hole of the clamping plate and the first mounting hole, and the bolt assembly on the other side is fixed by passing through the connecting groove of the clamping plate and the second mounting hole in an adjustable manner.

5. The support fixture for an ultra-large pressure vessel according to claim 1, characterized in that, The limiting nut is used to limit the screw-in depth of the guide tube.

6. The support fixture for an ultra-large pressure vessel according to claim 1, characterized in that, The support pipe is fixedly connected to the adjacent connecting pipe by welding.

7. The support fixture for an ultra-large pressure vessel according to claim 1, characterized in that, The guide tube's optical rod is fixedly connected to the inner side of the guide ring by welding.

8. A method for supporting an ultra-large pressure vessel, applied to the support fixture for the ultra-large pressure vessel as described in any one of claims 1 to 6, characterized in that, Includes the following steps: S1. Adjust the super-large pressure vessel to be constructed into a horizontal position for construction. S2. Insert the support fixture into the pressure vessel through one end opening, ensuring that the axial direction of the fixture is coaxial with that of the pressure vessel. S3. Install multiple support fixtures coaxially in the axial direction of the pressure vessel, and use the roundness of the fixture rings to maintain the standard roundness of the inner wall of the pressure vessel. S4. Construct the remaining parts of the pressure vessel under the support of the tooling ring; S5. Continue until the entire pressure vessel is completed and the tooling ring is removed.

9. A method for supporting an ultra-large pressure vessel according to claim 8, characterized in that, The adjacent support fixtures are staggered for support.

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