CN211852777U - Capping device for pressure container - Google Patents

Abstract

The utility model provides a pressure vessel's closing cap device, including the terminal surface closing cap, the peripheral part of terminal surface closing cap has a plurality of mounting holes along circumference distribution, and the terminal surface closing cap passes the mounting hole through first fastener and fixes on pressure vessel's sealing end face, and the terminal surface closing cap includes the polylith apron, and the polylith apron provides the partly of peripheral part separately to, the polylith apron has the overlap joint region through the butt joint of step terminal surface each other, passes the overlap joint region through the second fastener and links together the polylith apron each other. The capping device can easily seal the sealing end face of a large-sized pressure container.

Description

Capping device for pressure container

Technical Field

The utility model relates to a closing cap device of pressure vessel.

Background

The nuclear island main equipment reactor pressure vessel needs to be filled with nitrogen and sealed in the shipping and transportation process, so that the interior of the nuclear island main equipment reactor pressure vessel can keep certain positive pressure and dew point requirements. The diameter of the large-caliber sealing end face of the pressure container connected with the top cover is about 5000mm, the pressure container and the top cover are transported respectively in the transportation process, independent mechanical sealing needs to be carried out on the large end face of the pressure container, and the requirements of sealing of the pressure container, protection of the bolt hole and the sealing end face, convenience in dismounting, internal drying and the like are met. Conventional sealing means are generally only suitable for small and medium size openings. The size of the sealing end face of the pressure container is large, if a large-size whole end face sealing cover is adopted, the flatness of the sealing end face is difficult to meet the requirement, meanwhile, the large-size whole end face sealing cover is heavy, the fastening difficulty is correspondingly increased, and the pressure container has the defects of high cost, inconvenience in field assembly and disassembly and the like.

The utility model provides a closing cap device can easily realize the sealed of large size pressure vessel's seal end face.

SUMMERY OF THE UTILITY MODEL

The utility model provides a closing cap device can easily seal large size pressure vessel's sealing end face.

The utility model provides a closing cap device of pressure vessel, including the terminal surface closing cap, the peripheral part of terminal surface closing cap has a plurality of mounting holes along circumference distribution, the terminal surface closing cap passes through first fastener the mounting hole is fixed on pressure vessel's sealing end face, the terminal surface closing cap includes the polylith apron, the polylith apron provides separately a part of peripheral part, and, the polylith apron passes through the butt joint of step terminal surface each other and has the overlap joint region, passes through the second fastener the overlap joint region and will the polylith apron links together each other.

In one embodiment, of the cover plates, an intermediate cover plate provides two intermediate sections of the peripheral portion opposing in a first lateral direction and has intermediate step end faces on both sides in a second lateral direction, respectively, so that the intermediate cover plate has an intermediate boss protruding downward; the two side cover plates respectively provide two side sections of the peripheral part which are located between the two middle sections along the circumferential direction, and each side cover plate is provided with a side step end face at one side close to the middle cover plate, so that the side cover plate is provided with an upward protruding side boss, and the two middle step end faces of the middle cover plate are respectively butted with the side step end faces of the two side cover plates.

In one embodiment, the capping device further comprises a first gasket disposed at the overlap region, and the second fastener passes through the first gasket.

In one embodiment, two seal rings are provided between an outer peripheral portion of the end closure and a sealing end surface of the pressure vessel, and the two seal rings are located inside and outside the first fastening member, respectively, with respect to a center of the end closure.

In one embodiment, the sealing end face of the pressure vessel is provided with a threaded hole for fixing the first fastener; the outer peripheral part of the end face cover is provided with a screw hole lantern ring at a position corresponding to each mounting hole, in the screw hole lantern ring, a lantern ring body is used for the first fastening piece to pass through and is embedded into the screw hole, and a convex ring protrudes outwards from the lantern ring body and is arranged between the outer peripheral part of the end face cover and the sealing end face of the pressure container.

In one embodiment, the first fastener has a shank section provided at its upper end with an external thread for engagement with a nut, and a flange projecting outwardly from the shank section and provided with an external thread for engagement with the threaded bore.

In one embodiment, the capping device further comprises a drying chamber for holding a desiccant; the drying box is arranged at the position of the end face sealing cover corresponding to the container opening of the pressure container.

In one embodiment, the drying box is welded to a lower surface of the end closure; and the end face sealing cover is provided with a box opening communicated with the drying box, and the box opening is closed through a box cover.

In one embodiment, the cover closure further comprises a second gasket disposed between the lid and the end closure and disposed about the opening, the lid being secured to the end closure by a third fastener passing through the second gasket.

In one embodiment, the cover plates are each provided with reinforcing ribs.

Among the above-mentioned pressure vessel's closing cap device, the terminal surface closing cap falls into the polylith apron, provides respectively and is used for the peripheral part be connected with the sealed terminal surface partly, and the polylith apron can independently encapsulate, and the atress is even, can strengthen the sealed effect of fastening to can reduce the plane degree requirement to the apron. The cover plates are in butt joint with each other through the step end faces to be lapped, so that overlapping sealing is realized. Therefore, the capping device of the pressure container can easily seal the sealing end face of the pressure container, particularly the large-caliber sealing end face, is convenient to assemble and disassemble, is easy to manufacture the cover plate, and can reduce the cost.

Drawings

The above and other features, properties and advantages of the present invention will become more apparent from the following description of the embodiments with reference to the accompanying drawings, in which:

fig. 1 is an overall schematic view of a capping device.

Fig. 2 is a sectional view taken along line a-a of fig. 1.

Fig. 3 is a sectional view taken along line B-B of fig. 1.

Fig. 4 is a sectional view taken along line C-C of fig. 1.

Detailed Description

The present invention will be further described with reference to the following detailed description and the accompanying drawings, wherein the following description sets forth more details for the purpose of providing a thorough understanding of the present invention, but it is obvious that the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar generalizations and deductions based on the practical application without departing from the spirit of the present invention, and therefore, the scope of the present invention should not be limited by the contents of the detailed description.

For example, a first feature described later in the specification may be formed over or on a second feature, and may include embodiments in which the first and second features are formed in direct contact, and may also include embodiments in which additional features are formed between the first and second features, such that the first and second features may not be in direct contact. Further, when a first element is described as being coupled or coupled to a second element, the description includes embodiments in which the first and second elements are directly coupled or coupled to each other, as well as embodiments in which one or more additional intervening elements are added to indirectly couple or couple the first and second elements to each other.

Fig. 1 illustrates an example configuration of a capping apparatus 100 for a pressure vessel 200 (shown in fig. 2) in accordance with the present invention. The capping device 100 comprises an end cap 10. The end closure 10 may include a plurality of cover sheets. In the embodiment shown in fig. 1, the aforementioned cover plates may include a middle cover plate 1 and two side cover plates 2, and the two side cover plates 2 are respectively located at the left and right sides of the middle cover plate 1 in fig. 1. The intermediate lid 1 may provide two intermediate sections 101a of the peripheral portion 101 opposite in the first transversal direction X1, in fig. 1, i.e. two arc-shaped sections located respectively on the upper side and on the lower side. The two side cover plates 2 may respectively provide two side sections 101b of the outer peripheral portion 101 between the two middle sections 101a in the circumferential direction C0, that is, two side sections 101b respectively located on the left and right sides of the middle section 101a in fig. 1. It is understood that the end closure 10 may also include two cover plates or more than four cover plates.

Fig. 2 shows a schematic configuration of the end closure 10 fixed to the pressure vessel 200, taking the intermediate lid 1 of the end closure 10 as an example. It is to be understood that the drawings are designed solely for purposes of illustration and not as an isometric definition, and are not intended as a definition of the limits of the present invention.

Referring to fig. 1, a plurality of mounting holes 102 are distributed along a circumferential direction C0 in an outer circumferential portion 101 of the end cover 10.

Referring to fig. 2, the end cap 10 is secured to the sealing end 201 of the pressure vessel 200 by the first fastener 41 passing through the mounting hole 102. In the embodiment shown in fig. 2, the sealing end face 201 of the pressure vessel 200 is provided with threaded holes 202 for fixing the first fastening members 41. The fasteners may be, for example, screws, bolts, etc., including a first fastener 41 described herein and second and third fasteners 42, 43, which will be described later.

The end closure 10 includes a plurality of cover plates that each provide a portion of the peripheral portion 101 of the end closure 10. Thus, the end face sealing cover 10 is divided into a plurality of cover plates which are respectively processed and manufactured, the processing is easy, the cost is reduced, the flatness of each cover plate is easier to ensure, and the sealing requirement is easy to meet. Moreover, when the end face cover 10 is mounted and fixed on the sealing end face 201 of the pressure vessel 200 or is dismounted from the pressure vessel 200, each cover plate can be respectively mounted on the pressure vessel 200 or dismounted from the pressure vessel 200, the dismounting is convenient, and the mounting difficulty is greatly reduced.

The end closure 10 includes a plurality of cover panels that are joined to one another by a stepped end-to-end interface having a lap joint region S0, and the plurality of cover panels are joined to one another by a second fastener 42 (shown in fig. 3) passing through the lap joint region S0. Fig. 3 shows a connection structure between the plurality of cover plates by taking the middle cover plate 1 and the side cover plate 2 on the left side in fig. 1 as an example. With reference to fig. 1 and 3, the intermediate cover plate 1 may have intermediate step end faces 11 on both sides in the second transverse direction X2, respectively, so that the intermediate cover plate 1 has intermediate bosses 12 protruding downward. Only the intermediate step end face 11 on the left side of the intermediate cover plate 1 is shown in fig. 3. Each side cover plate 2 (in fig. 3, the side cover plate 2 located on the left side of the middle cover plate 1 is taken as an example) may have a side step end surface 21 on a side (in fig. 3, the right side) close to the middle cover plate 2, so that the side cover plate 2 has a side boss 22 protruding upward. It is understood that the two middle step end surfaces 11 of the middle cover plate 1 can be butted with the side step end surfaces 21 of the two side cover plates 2, respectively. "stepped end surface" roughly means that the end surface includes two vertical surfaces distributed in the thickness direction or the height direction (in fig. 3, up and down direction) and a horizontal surface connecting the two vertical surfaces. It will be appreciated that the two vertical faces of the step end face need not be perfectly vertical, as long as there is a component in the vertical direction. The level of the step end face is not required to be completely horizontal, so long as there is a component in the horizontal direction.

In fig. 3, the side step end surface 21 of the side deck 2 includes a first horizontal surface 210 and a first vertical surface 211 and a second vertical surface 212 connected by the first horizontal surface 210. The intermediate step end surface 11 of the intermediate cover plate 1 includes a second horizontal surface 110 and third and fourth vertical surfaces 111 and 112 connected by the second horizontal surface 110. The first horizontal surface 210 of the side step end surface 21 faces the second horizontal surface 110 of the middle step end surface 11, the first vertical surface 211 of the side step end surface 21 faces the third vertical surface 111 of the middle step end surface 11, and the second vertical surface 212 of the side step end surface 21 faces the fourth vertical surface 112 of the middle step end surface 11, whereby the abutment of the step end surfaces is achieved. In FIG. 3, first vertical face 211 and third vertical face 111 may have a clearance therebetween, while second vertical face 212 and fourth vertical face 112 may be in contact fit or have a small clearance fit.

For convenience of description, the terms "lower," "upper," "horizontal," "vertical," and the like are used herein in spatial relationship with the pressure vessel 200 positioned with the sealing end face 201 on top, thereby describing the relationship of one element or feature to other elements or features shown in the drawings. It will be understood, however, that these terms of spatial relationship are intended to encompass other orientations of the element or component in use or operation in addition to the orientation depicted in the figures. For example, if the components in the figures are turned over, elements described as "below" other elements or features would then be oriented "above" the other elements or features, and the spatially relative descriptors used herein should be interpreted accordingly.

Generally, the end face cover 10 of the above-mentioned cover sealing device 100 can ensure better sealing performance with the sealing end face 201 of the pressure container 200 by adopting the block arrangement, and facilitates the dismounting and processing, and meanwhile, the lap joint is realized through the step structure between the cover plates arranged in the block arrangement, and the sealing performance between the cover plates arranged in the block arrangement can be ensured.

With continued reference to fig. 3, the capping device 100 may further include a first gasket 51 disposed at the overlapping area S0, and the second fastening member 42 passes through the first gasket 51. In other words, the first gasket 51 may be placed between the first horizontal surface 210 of the side step end surface 21 and the second horizontal surface 110 of the middle step end surface 11. By adjusting the tightening degree of the second fastening member 42, the degree of compaction of the first gasket 51 is adjusted, thereby ensuring the sealing performance between the divided cover plates. In fig. 1, the overlapping area S0 is in the form of a strip, the first gasket 51 may be a strip gasket, and the second fastening member 42 may be a cover screw.

Referring to fig. 1 and 2, two seal rings 53 are provided between the outer peripheral portion 101 of the end cap 10 and the seal end surface 201 of the pressure vessel 200, i.e., two seal rings 53 on the left and right sides in fig. 2. The two sealing rings 53 are located inside and outside the first fastening member 41, i.e., on the left and right sides of the first fastening member 41 in fig. 3, respectively, with respect to the center O (shown in fig. 1) of the end closure 10. The sealing ring 53, that is, the annular sealing gasket, is arranged along the whole circle of the sealing end surface 201 of the pressure container 200, so that the whole sealing is realized, the sealing effect can be ensured, and moreover, the sealing rings 53 are respectively arranged on the inner side and the outer side of the first fastening piece 41, so that the sealing performance between the end surface sealing cover 10 and the pressure container 200 can be better ensured.

With continued reference to fig. 2, the sealing end face 201 is provided with a threaded bore 202 for securing the first fastener 41, as previously described. The peripheral portion 101 of the end cap 10 may be provided with a screw hole collar 6, for example by welding, at a position corresponding to each mounting hole 102. The threaded bore collar 6 may include a collar body 61 and a male ring 62. The collar body 61 is passed through by the first fastening member 41 and fitted into the threaded hole 202. The male ring 62 protrudes outward from the collar body 61 and is disposed between the outer peripheral portion 101 of the end cap 10 and the seal end face 201 of the pressure vessel 200. The end cover 10 has a certain weight, and by providing the screw hole collar 6 at a corresponding portion of each mounting hole 102, the collar body 61 of the screw hole collar 6 is embedded in the screw hole 202 so that the weight of the end cover 10 is supported, and can be kept stable during transportation.

First fastener 41 may have a stem section 411 and a flange 412 projecting outwardly from stem section 411. The upper end 413 of the rod section 411 may be provided with an external thread for cooperation with the nut 46. The flange 412 may be provided with external threads for mating with the threaded aperture 202. The thinner rod segment 411 facilitates passage through the threaded collar 6 and mounting hole 102. The end-face cover 10 can be fastened by a single ring of the first fastening members 41 provided on the outer peripheral portion 101 and the nuts 46, the first fastening members 41 are connected to the threaded holes 202 of the pressure vessel 200 at the middle portions thereof by the external threads of the flanges 412 and are pressed against the sealing rings 53 while fastening the end-face cover 10 by the nuts 46 at the upper ends thereof. The first fastening element 41 in the form of a screw engages with the nut 46 and presses the sealing ring 53 well, so that the end closure 10 is stressed well and uniformly.

Fig. 4 shows a related configuration of the drying box 7. With reference to fig. 1 and 4, the capping device 100 may further include a drying chamber 7 for placing the drying agent 70, and two drying chambers 7 are provided in fig. 1. The drying box 7 may be provided at a position of the end closure 10 corresponding to the container opening of the pressure container 200. In other words, the drying box 7 may be placed in the center portion 108 of the end cover 10 surrounded by the outer peripheral portion 101. This facilitates drying of the gas inside the pressure vessel 200. For example, the drying box 7 may have a porous cube structure.

The drying box 7 may be welded to the lower surface of the end closure 10, that is, the surface facing the container opening of the pressure container 200. The end cover 10 may be provided with a tank opening 71 communicating with the drying chamber 7, and the tank opening 71 may be closed by a tank cover 72. Therefore, the drying box 7 can be conveniently opened and closed, and the drying agent can be replaced at regular time.

The closure 100 may also include a second gasket 52. The second gasket 52 may be disposed between the cover 72 and the end cover 10 and disposed around the box opening 71. The cover 72 may be secured to the end closure 10 by a third fastener 43 passing through the second gasket 52. In the embodiment shown in fig. 1, the tank opening 71 is in the form of a square, the second gasket 52 is also a square gasket, and the third fastening member 43 may be a tank plate screw.

In the embodiment shown in fig. 1, the end closure 10 comprises a plurality of cover plates that may each be provided with stiffening ribs, for example by welding. For example, the intermediate cover 1 may be provided with an intermediate rib 81 attached to the lower surface, for example, including a first horizontal plate 811 and two second horizontal plates 812 centrally connected to the first horizontal plate 811. For another example, the side cover 2 may be provided with a side reinforcement 82, for example, including a third horizontal plate 821 and two fourth horizontal plates 822 connected at ends to the third horizontal plate 821. The reinforcing ribs are arranged to ensure the rigidity of each cover plate.

In the embodiment shown in fig. 1, the overlapping area S0 is located between two adjacent mounting holes 102 at the outer peripheral portion 101. The distribution density of the mounting holes 102 on both sides of the overlap region S0 is greater than that of the other regions. In other words, the pitch of the mounting holes 102 located on both sides of the overlap region S0 is smaller than the pitch of the mounting holes 102 of the other regions. Thus, the sealing performance between the cover plates can be better ensured.

Taking the illustrated capping device 100 as an example, exemplary assembly and installation steps of the capping device 100 will be described next with reference to fig. 1-4. The sealing ring 53 may be first arranged on the sealing end surface 201 of the pressure vessel 200. One turn of the screw as the first fastening member 41 is sequentially screwed into the screw hole 202 up to a certain depth. The middle cover plate 1 and the two side cover plates 2 are prepared, and reinforcing ribs, screw hole lantern rings 6 and the like are welded at corresponding positions. The two side cover plates 2 are mounted such that the screw hole collars 6 are aligned and fitted into the screw holes 202, and the upper ends of the screws as the first fastening members 41 are exposed from the side cover plates 2. The position of the side cover plate 2 is adjusted to enable the side cover plate 2 to be tightly matched with the sealing ring 53. A first gasket 51 is arranged on a first horizontal plane 210 of the side step end face 21 of each side deck 2. The middle cover plate 1 is installed and fastened by the second fastening member 42, and is tightly matched and pressed with the side cover plate 2 and the first sealing gasket 51. A screw as the first fastening member 41 is screwed into the screw hole 202, and the nut 46 is tightened to press the packing 53 as much as possible. The drying agent 70 is put into the drying box 7, the second gasket 52 is installed, and the box cover 72 is fastened and installed by the third fastening member 43.

Among the above-mentioned closing cap device, the terminal surface closing cap adopts the independent apron of polylith, simple structure, convenient dismouting, cost are lower. The multiple cover plates are independently packaged, the stress is uniform, the fastening and sealing effects can be enhanced, and the requirement on the flatness of the cover plates is not high. The cover plate can adopt a thin plate form and is provided with a reinforcing rib structure, so that the rigidity is good. The structure of the screw hole lantern ring is arranged, so that the end face sealing cover can have supporting force and keep stable in the transportation process. The drying box is arranged on the lower side of the end face sealing cover to place a drying agent, so that the drying of the internal environment of the pressure container is facilitated.

Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. For example, the conversion methods in the different embodiments may be combined as appropriate. Therefore, any modification, equivalent changes and modifications made to the above embodiments according to the technical spirit of the present invention, all without departing from the content of the technical solution of the present invention, fall within the scope of protection defined by the claims of the present invention.

Claims (10)

1. A sealing device of a pressure vessel comprises an end face sealing cover, a plurality of mounting holes are distributed on the periphery of the end face sealing cover along the circumferential direction, the end face sealing cover is fixed on the sealing end face of the pressure vessel by a first fastening piece penetrating through the mounting holes,

the end closure includes a plurality of cover panels each providing a portion of the peripheral portion, and the plurality of cover panels are butted against each other by a stepped end face to have lap joint regions through which the plurality of cover panels are joined to each other by a second fastening member.

2. The capping device of claim 1 wherein the plurality of cover plates comprise:

an intermediate cover plate that provides two intermediate sections of the outer peripheral portion that are opposed in a first lateral direction and has intermediate step end faces on both sides in a second lateral direction, respectively, such that the intermediate cover plate has an intermediate boss that protrudes downward; and

and the two side cover plates are respectively provided with two side sections of which the peripheral parts are positioned between the two middle sections along the circumferential direction, and each side cover plate is provided with a side step end surface at one side close to the middle cover plate, so that the side cover plate is provided with an upward protruding side boss, and the two middle step end surfaces of the middle cover plate are respectively butted with the side step end surfaces of the two side cover plates.

3. The capping device of claim 1,

the cover sealing device further comprises a first sealing gasket arranged in the overlapping area, and the second fastening piece penetrates through the first sealing gasket.

4. The capping device of claim 1,

two seal rings are arranged between the outer peripheral part of the end face seal cover and the sealing end face of the pressure container, and the two seal rings are respectively positioned on the inner side and the outer side of the first fastening piece relative to the center of the end face seal cover.

5. The capping device of claim 4,

a threaded hole for fixing the first fastener is formed in the sealing end face of the pressure container;

the peripheral part of terminal surface closing cap is provided with the screw lantern ring in the position that corresponds every mounting hole, the screw lantern ring includes:

a collar body through which the first fastener passes and into which the threaded bore is inserted; and

a male ring projecting outwardly from the collar body and disposed between an outer peripheral portion of the end closure and a sealing end face of the pressure vessel.

6. The capping device of claim 5,

the first fastener has:

the upper end of the rod section is provided with an external thread which is used for matching with the nut; and

a flange projecting outwardly from the shank segment and provided with an external thread for mating with the threaded bore.

7. The capping device of claim 1,

the cover sealing device also comprises a drying box for placing a drying agent;

the drying box is arranged at the position of the end face sealing cover corresponding to the container opening of the pressure container.

8. The capping device of claim 7,

the drying box is welded on the lower surface of the end face sealing cover; and is

The end face sealing cover is provided with a box opening communicated with the drying box, and the box opening is closed through a box cover.

9. The capping device of claim 8,

the cover device further comprises a second gasket disposed between the cover and the end cover and disposed around the opening, the cover being secured to the end cover by a third fastener passing through the second gasket.

10. The capping device of claim 1,

the cover plates are respectively provided with reinforcing ribs.

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