Manhole structure
By designing the limit structure and detachable connection structure in the manhole structure, the problem of difficulty in extracting the core during maintenance is solved, and the convenient extraction of the core and maintenance efficiency is improved.
Patent Information
- Application Number
- CN202420750825.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-11
- Publication Date
- 2025-03-21
- Estimated Expiration
- 2034-04-11
AI Technical Summary
When inspecting the pressure vessel, the core body is difficult to easily extract from the manhole due to the limited connection method, resulting in low maintenance efficiency.
A manhole structure is designed, including a base, a cover and a core. By providing a second limit structure on the core, it is positioned in conjunction with the first limit structure of the inner side wall of the connection part, and connected the core to the connection part through a detachable connection structure. The core and the cover are designed in a separate form, reducing the weight and complexity of the core.
It realizes convenient extraction of the core, reduces the difficulty and time of operation during the maintenance process, and improves the maintenance efficiency of the pressure vessel.
Smart Images
Figure CN222650554U_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to the field of petrochemical equipment, and in particular, to a manhole structure. Background Art
[0002] A manhole is generally provided in a pressure vessel. When the pressure vessel is inspected and repaired, in order to avoid the accumulation of materials inside the manhole and the situation that the manhole cannot be opened, it is usually necessary to set a core body in the internal space of the manhole to prevent the materials from entering the manhole. At present, there are two ways to connect the core body and the flange cover of the manhole: one is that the core body and the flange cover of the manhole are not fixedly connected. When the core body is taken out, since the core body is long, in order to ensure the rigidity of the core body, it is necessary to set a reinforcing rib plate in the core body, which makes the core body heavy and inconvenient to take out; the other is that the core body is fixedly connected to the flange cover of the manhole. When the core body is taken out, since the hanging column connected to the flange cover moves in a circle around the shaft ear, and the core body moves in a straight line in the manhole, it is more difficult to pull out the core body due to the limited moving space. Utility Model Content
[0003] The purpose of the present disclosure is to provide a manhole structure, which can facilitate workers to pull out the core from the manhole when overhauling the pressure vessel, so as to at least partially solve the above technical problems.
[0004] In order to achieve the above-mentioned purpose, the present disclosure provides a manhole structure, which includes: a base, including a connecting pipe part and a flange part, the inner side wall of the connecting pipe part is provided with a first limiting structure; a cover body, which can be openably installed on the flange part; and a core body, the core body is provided with a second limiting structure that can cooperate with the first limiting structure and position the core body; the core body is detachably connected to the connecting pipe part through a connecting structure.
[0005] Optionally, the core body includes a core barrel and a baffle connected to the bottom end of the core barrel, and the second limiting structure is located on a side of the core barrel away from the baffle.
[0006] Optionally, the outer diameter of the core tube is smaller than the inner diameter of the connecting portion, the first limiting structure includes a mounting portion and a first limiting portion connected to the mounting portion and extending toward the central axis direction of the connecting portion, and the second limiting structure includes a second limiting portion extending toward the inner side wall direction of the connecting portion, and when the core tube is located in the connecting portion, the bottom surface of the second limiting portion abuts against the top surface of the first limiting portion.
[0007] Optionally, a bending angle of the first limiting portion relative to an extension direction of the inner side wall of the connecting pipe portion is 90°, and / or a bending angle of the second limiting portion relative to an extension direction of the core tube is 90°.
[0008] Optionally, a gap is left between the second limiting portion and the inner wall of the connecting portion, and / or a gap is left between the first limiting portion and the outer wall of the core tube.
[0009] Optionally, there are multiple mounting parts; the connecting structure includes first mounting holes respectively arranged on the mounting parts, multiple second mounting holes circumferentially spaced along the wall surface of the core tube, and a threaded locking member, which passes through the first mounting hole and the second mounting hole and is used to limit the circumferential position of the core tube relative to the connecting pipe part.
[0010] Optionally, the connecting pipe portion further includes a sealing member circumferentially connected to the inner wall of the connecting pipe portion and located below the mounting portion, wherein the outer diameter of the sealing member is equal to the inner diameter of the connecting pipe portion, and the inner diameter of the sealing member is equal to the outer diameter of the core barrel.
[0011] Optionally, the sealing member is constructed as a round steel connected to the inner wall of the connecting pipe portion.
[0012] Optionally, the length of the core barrel is smaller than the length of the connecting pipe portion.
[0013] Optionally, a handle is provided on a side of the baffle facing the cover body and a side of the cover body facing away from the baffle.
[0014] Through the above technical scheme, that is, the manhole structure provided by the present invention, positioning can be achieved through the second limiting structure on the core body and the first limiting structure on the inner wall of the connecting pipe part, and can be detachably connected to the connecting pipe part through the connecting structure. At the same time, the core body and the cover body are designed to be in a separate form, and there is no need to add reinforcing ribs, which not only reduces the weight of the core body itself, but also makes it easy to take out the core body without being affected by the circular motion of the hanging column of the cover body around the shaft ear. When the staff inspects the pressure vessel, they only need to adjust the connecting structure to separate the core body from the connecting pipe part, and release the cooperation between the first limiting structure and the second limiting mechanism to pull the core body out of the connecting pipe part, which is convenient for the staff to pull out the core body when inspecting the pressure vessel.
[0015] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:
[0017] Figure 1 is a schematic diagram of a manhole structure and its internal structure provided in an exemplary embodiment of the present disclosure;
[0018] Figure 2 yes Figure 1 Sectional view at the AA position;
[0019] Figure 3 yes Figure 1 A partial enlarged schematic diagram of position B in the middle.
[0020] Description of Reference Numerals
[0021] 1-base; 110-pipe connection part; 111-seal; 120-flange part; 130-first limiting structure; 131-first limiting part; 132-mounting part; 133-first mounting hole; 2-cover body; 3-core body; 310-second limiting structure; 311-second limiting part; 320-core tube; 321-second mounting hole; 330-baffle; 4-threaded locking member; 5-handle. DETAILED DESCRIPTION
[0022] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.
[0023] In this disclosure, unless otherwise stated, directional words such as "upper" and "lower" generally refer to the direction relative to the Figure 1 In the direction of the drawing, "up" and "down", "inside" and "outside" refer to the inside and outside relative to the outline of the component or structure itself, and "first" and "second" are used to distinguish one element from another and have no order or importance. In addition, the same figure marks in different reference drawings represent the same elements.
[0024] In the prior art, a manhole is generally provided in a pressure vessel. When the pressure vessel is inspected and repaired, in order to avoid the accumulation of materials inside the manhole and the situation that the manhole cannot be opened, it is usually necessary to set a core body in the internal space of the manhole to prevent the materials from entering the manhole. At present, there are two connection methods between the core body and the flange cover of the manhole: one is that the core body and the flange cover of the manhole are not fixedly connected. When the core body is taken out, since the core body is long, in order to ensure the rigidity of the core body, it is necessary to set a reinforcing rib plate in the core body, which makes the core body heavy and inconvenient to take out; the other is that the core body is fixedly connected to the flange cover of the manhole. When the core body is taken out, since the hanging column connected to the flange cover makes a circular motion around the shaft ear, and the core body moves in a straight line in the manhole, it is more difficult to pull out the core body due to the limited moving space.
[0025] Based on this, the present disclosure provides a manhole structure, referring to Figures 1 to 3As shown, the manhole structure includes a base 1, a cover body 2 and a core body 3, the base 1 includes a connecting pipe portion 110 and a flange portion 120, the inner side wall of the connecting pipe portion 110 is provided with a first limiting structure 130; the cover body 2 can be openably installed on the flange portion 120; the core body 3 is provided with a second limiting structure 310 that can cooperate with the first limiting structure 130 and position the core body 3; the core body 3 is detachably connected to the connecting pipe portion 110 through a connecting structure.
[0026] In this way, the manhole structure can be positioned by the second limiting structure 310 on the core body 3 and the first limiting structure 130 on the inner wall of the connecting pipe 110, and can be detachably connected to the connecting pipe 110 through the connecting structure. At the same time, the core body 3 and the cover body 2 are designed to be separated, and there is no need to add reinforcing ribs, which not only reduces the weight of the core body 3 itself, but also makes it easy to take out the core body 3 without being affected by the circular motion of the hanging column of the cover body 2 around the shaft ear. When the staff inspects the pressure vessel, they only need to separate the core body 3 from the connecting pipe 110 by adjusting the connecting structure, and release the cooperation between the first limiting structure 130 and the second limiting structure 310 to pull the core body 3 out of the connecting pipe 110, so that the staff can easily pull out the core body 3 when inspecting the pressure vessel.
[0027] It should be noted that the first limiting structure 130 and the second limiting structure 310 in the present disclosure may be any suitable structure, for example, Figure 1 As shown, the first limiting structure 130 can be a structure with a flange arranged on the inner wall of the connecting pipe portion 110, and the second limiting structure 310 can be a structure with a flange located in the circumferential direction of the core body 3 and extending toward the direction away from the center of the core body 3. When the first limiting structure 130 and the second limiting structure 310 need to cooperate in positioning, the top surface of the flange of the first limiting structure 130 can be abutted against the bottom surface of the flange of the second limiting structure 310 to achieve positioning.
[0028] In some embodiments, reference Figures 1 to 3 As shown, the core body 3 includes a core barrel 320 and a baffle 330 connected to the bottom end of the core barrel 320, and the second limiting structure 310 is located on the side of the core barrel 320 away from the baffle 330. In this way, the core body 3 is further improved in light weight, and the core body 3 is improved to be composed of the baffle 330 and the core barrel 320. When the staff is inspecting the pressure vessel, it is also convenient to take out the core barrel 320 and the baffle 330 from the pipe 110. Figure 1 and Figure 2 As shown, the baffle 330 can be located at a portion close to the manhole away from the connecting pipe portion 110, and the baffle 330 itself can have a certain bending angle, and the bending angle can be the same as the bending angle or curvature of the outer wall of the pressure vessel. In this way, the space inside the pressure vessel can be maximized.
[0029] In some embodiments, reference Figure 1 and Figure 3 As shown, the outer diameter of the core tube 320 is smaller than the inner diameter of the connecting portion 110, the first limiting structure 130 includes a mounting portion 132 and a first limiting portion 131 connected to the mounting portion 132 and extending toward the central axis direction of the connecting portion 110, and the second limiting structure 310 includes a second limiting portion 311 extending toward the inner side wall direction of the connecting portion 110. When the core tube 320 is located in the connecting portion 110, the bottom surface of the second limiting portion 311 abuts against the top surface of the first limiting portion 131. In this way, the outer diameter of the core tube 320 is smaller than the inner diameter of the connecting pipe 110, which can ensure that the core tube 320 can be smoothly inserted into the connecting pipe 110. The mounting portion 132 can be a mounting plate that fits against the inner wall of the connecting pipe 110. The first limiting portion 131 can be a first flange extending toward the central axis direction of the connecting pipe 110. The second limiting portion 132 can be a second flange arranged on the side of the core tube 320 away from the baffle 330 and extending toward the side wall of the connecting pipe 110. When the core body 3 is placed as a whole in the connecting pipe 110 to seal the manhole, the bottom surface of the second flange can be abutted against the top surface of the first flange for sealing.
[0030] In some embodiments, reference Figure 1 and Figure 3 As shown, the bending angle of the first limiting portion 131 relative to the extending direction of the inner side wall of the connecting pipe portion 110 is 90°, and / or the bending angle of the second limiting portion 311 relative to the extending direction of the core tube 320 is 90°. In this way, when the top surface of the first limiting portion 131 abuts against the bottom surface of the second limiting portion 311, the bending angles of both are 90°. In this way, the abutment in a face-to-face contact manner can more stably connect the first limiting portion 131 and the second limiting portion 311, and further improve the stability of the connection of the core body 3 in the connecting pipe portion 110.
[0031] In some embodiments, reference Figure 1 and Figure 3 As shown, a gap is left between the second limiting portion 311 and the inner wall of the connecting portion 110, and / or a gap is left between the first limiting portion 131 and the outer wall of the core tube 320. In this way, when the core body 3 is inserted into the connecting portion 110 or taken out of the connecting portion 110, the side of the second limiting portion 311 close to the connecting portion 110 and the inner wall of the connecting portion 110 can be prevented from being scratched, and the side of the first limiting portion 131 close to the outer wall of the core tube 320 and the outer wall of the core tube 320 can also be prevented from being scratched.
[0032] In some embodiments, reference Figures 1 to 3As shown, there are multiple mounting parts 132; the connection structure includes first mounting holes 133 respectively arranged on the mounting parts 132, multiple second mounting holes 321 circumferentially spaced on the wall surface of the core barrel 320, and a threaded locking member 4. The threaded locking member 4 passes through the first mounting hole 133 and the second mounting hole 321 to limit the circumferential position of the core barrel 320 relative to the connecting pipe part 110. In this way, the threaded locking member 4 can pass through the first mounting hole 133 and the second mounting hole 321 to limit the rotation direction of the core barrel 320 along its axis. In this way, the core barrel 320 can be prevented from rotating relative to the connecting pipe part 110 when installed in the connecting pipe part 110, thereby causing the problem of poor connection stability. At the same time, referring to Figure 2 As shown, the number of mounting portions 132 and threaded locking members 4 can be four, and the four mounting portions 132 and the four threaded locking members 4 are matched one by one and arranged at intervals around the inner wall of the connecting pipe portion 110. In this way, the four threaded locking members 4 can jointly limit the circumferential position of the core barrel 320, thereby improving the stability of the limiting position of the core barrel 320.
[0033] When it is necessary to limit the core tube 320 circumferentially relative to the connecting pipe part 110, the core tube 320 can be first placed in the connecting pipe part 110, and after the bottom surface of the second limiting part 311 is abutted against the top surface of the first limiting part 131, the core tube 320 is rotated with the central axis of the connecting pipe part 110 as the rotation center, and after the multiple first mounting holes 133 and the multiple second mounting holes 321 are matched one by one to the coaxial position, the threaded locking piece can be rotationally inserted into the first mounting hole 133 and the second mounting hole 321 to complete the limitation of the core tube 320.
[0034] In addition, in order to improve the connection tightness between the threaded locking member 4 and the first mounting hole 133 and the second mounting hole 321, the first mounting hole 133 and / or the second mounting hole 321 can be set as a threaded hole with an internal thread structure, and the threaded locking member 4 can be a bolt with an external thread structure. The bolt is threadedly connected to the threaded hole, which can further improve the connection tightness between the threaded locking member 4 and the first mounting hole 133 and the second mounting hole 321.
[0035] On the basis of the above embodiment, a nut can also be provided on the bolt. When the bolt is threadedly connected to the first mounting hole 133 and the second mounting hole 321, the nut on the bolt can be rotated to make one end face of the nut abut against the inner wall of the core barrel 320 (such as Figure 1 and Figure 3 The fixing strength of the threaded locking member 4 on the core barrel 320 can also be improved, so that the core barrel 320 is less likely to shake relative to the connecting portion 110, thereby improving the stability of the connection between the core barrel 320 and the connecting portion 110.
[0036] In addition, in the present disclosure, the number of mounting portions 132 may be any suitable number greater than two, such as four, six, eight, etc., and the present disclosure does not limit this.
[0037] In some embodiments, reference Figures 1 to 3 As shown, the connecting pipe 110 further includes a sealing member 111 which is circumferentially connected to the inner wall of the connecting pipe 110 and is located below the mounting portion 132. The outer diameter of the sealing member 111 is equal to the inner diameter of the connecting pipe 110, and the inner diameter of the sealing member 111 is equal to the outer diameter of the core barrel 320. In this way, the sealing member 111 can seal the gap between the inner wall of the connecting pipe 110 and the outer wall of the core barrel 320. At the same time, the sealing member 111 which is circumferentially connected to the inner wall of the connecting pipe 110 can also guide the core body 3 when it is installed in the manhole, and can prevent the core body 3 from being offset when it is installed in the manhole. After the core body 3 is installed in the manhole, the sealing member 111 can limit the core barrel 320 in the circumferential direction, and can prevent the core barrel 320 from shaking in the radial direction. At the same time, it can also prevent the material outside the manhole from entering the manhole from the gap between the inner wall of the connecting pipe 110 and the outer wall of the core barrel 320.
[0038] In some embodiments, reference Figures 1 to 3 As shown, the sealing member 111 is constructed as a round steel connected to the inner wall of the connecting pipe portion 110. In this construction mode, the round steel can be directly welded to the inner wall of the connecting pipe portion 110, and the round steel itself has a high anti-deformation strength and sealing effect.
[0039] In some embodiments, reference Figure 1 As shown, the length of the core barrel 320 is less than the length of the connecting pipe 110. By limiting the length of the core barrel 320 in this way, the weight of the core barrel 320 itself can be further reduced, and the manufacturing cost and processing difficulty of the core barrel 320 itself can also be reduced. When the pressure vessel is overhauled, it is also easier to remove and install the lightweight core barrel 320 from the connecting pipe 110, thereby improving the overhaul efficiency. In the present disclosure, the length of the core barrel 320 can be 1 / 2 to 2 / 3 of the length of the connecting pipe, and the core barrel 320 of a suitable processing length can also be selected according to actual conditions.
[0040] In some embodiments, reference Figure 1 As shown, a handle 5 is provided on the side of the baffle plate 330 facing the cover body 2 and on the side of the cover body 2 facing away from the baffle plate 330. In this way, the handle 5 can facilitate the staff to open the cover body 2 and also facilitate the core body 3 to be lifted upward from the pipe portion 110, thereby improving the maintenance efficiency of the pressure vessel.
[0041] The present disclosure exemplarily describes the specific operation process of the manhole structure when overhauling a pressure vessel, which may include the following steps:
[0042] S1: Remove the bolts and other fasteners connecting the cover body 2 and the flange part 120, hold the handle 5 on the cover body 2, move the hanging column of the cover body 2 in a circle around the shaft ear, and open the cover body 2.
[0043] S2: Rotate the nuts on the plurality of thread locking members 4 toward the center of the core barrel 320 , loosen the plurality of nuts, and then rotate the thread locking members 4 to separate the thread locking members 4 from the first mounting hole 133 and the second mounting hole 321 .
[0044] S3: Holding the handle 5 on the surface of the baffle 330, the entire core 3 is pulled out from the pipe 110 along the Figure 1 The first limiting structure 130 is then separated from the second limiting structure 310, and the core 3 is pulled out of the connecting pipe 110. The staff can then enter the manhole to inspect and repair the pressure vessel.
[0045] The present disclosure exemplarily describes the process of installing the core 3 after the pressure vessel is overhauled, which may include the following steps:
[0046] S4: After the inspection is completed, align the core body 3 with the connecting pipe portion 110 , hold the handle 5 on the baffle 330 , and install the core body 3 into the connecting pipe portion 110 .
[0047] S5: After the top surface of the first limiting portion 131 is abutted against the bottom surface of the second limiting portion 311, the core tube 320 is adaptively rotated until the multiple first mounting holes 133 and the multiple second mounting holes 321 correspond to the coaxial position one by one, and then the multiple threaded locking members 4 are inserted into the second mounting holes 321 and the first mounting holes 133 one by one in sequence, and the nuts on the threaded locking members 4 are rotated in the opposite direction until one end face of the nut can abut against the inner wall of the core tube 320, and the locking is completed.
[0048] S6: Holding the handle 5 on the cover body 2, move the hanging column of the cover body 2 around the shaft ear in a circular motion opposite to step S1, and then buckle the cover body 2 to the flange part 120, install the bolts and other fasteners connecting the cover body 2 and the flange part 120, and complete the whole operation.
[0049] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.
[0050] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.
[0051] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.
Claims
1. A manhole structure, characterized in that: include: The base comprises a connecting portion and a flange portion, wherein the inner side wall of the connecting portion is provided with a first limiting structure; A cover body, openably mounted on the flange portion; as well as The core body is provided with a second limiting structure capable of cooperating with the first limiting structure and positioning the core body; the core body is detachably connected to the connecting pipe part through a connecting structure.
2. The manhole structure according to claim 1, characterized in that: The core body comprises a core barrel and a baffle connected to the bottom end of the core barrel, and the second limiting structure is located on a side of the core barrel away from the baffle.
3. The manhole structure according to claim 2, characterized in that: The outer diameter of the core tube is smaller than the inner diameter of the connecting pipe part, the first limiting structure includes a mounting part and a first limiting part connected to the mounting part and extending toward the central axis direction of the connecting pipe part, the second limiting structure includes a second limiting part extending toward the inner side wall direction of the connecting pipe part, when the core tube is located in the connecting pipe part, the bottom surface of the second limiting part abuts against the top surface of the first limiting part.
4. The manhole structure according to claim 3, characterized in that: The bending angle of the first limiting portion relative to the extension direction of the inner side wall of the connecting pipe portion is 90°, and / or the bending angle of the second limiting portion relative to the extension direction of the core tube is 90°.
5. The manhole structure according to claim 4, characterized in that: A gap is left between the second limiting portion and the inner wall of the connecting portion, and / or a gap is left between the first limiting portion and the outer wall of the core tube.
6. The manhole structure according to claim 5, characterized in that: The number of the mounting parts is multiple; The connecting structure includes first mounting holes respectively arranged on the mounting parts, a plurality of second mounting holes circumferentially spaced along the wall surface of the core tube, and a threaded locking member, which passes through the first mounting holes and the second mounting holes and is used to limit the circumferential position of the core tube relative to the connecting pipe part.
7. The manhole structure according to claim 6, characterized in that: The connecting pipe part also includes a sealing member circumferentially connected to the inner wall of the connecting pipe part and located below the mounting part. The outer diameter of the sealing member is equal to the inner diameter of the connecting pipe part, and the inner diameter of the sealing member is equal to the outer diameter of the core barrel.
8. The manhole structure according to claim 7, characterized in that: The sealing member is constructed as a round steel bar connected to the inner side wall of the connecting pipe portion.
9. The manhole structure according to claim 2, characterized in that: The length of the core barrel is smaller than the length of the connecting pipe portion.
10. The manhole structure according to claim 2, characterized in that: A handle is provided on a side of the baffle facing the cover body and a side of the cover body facing away from the baffle.