阅读说明：本技术 无死角人孔结构 (Manhole structure without dead angle ) 是由 何国强 陈庭清 于 2021-07-20 设计创作，主要内容包括：本发明提供了一种无死角人孔结构,属于密封装置技术领域,包括人孔底座、盖板结构以及固定件；人孔底座连接在容器上,人孔底座的内侧设有支撑平台,支撑平台的中部具备倒锥台形的容纳腔,人孔底座上设置有紧固组件；盖板结构包括顶板和连接在顶板下端的连接部,连接部的侧壁与容纳腔的侧壁贴合,且二者之间设置有密封圈；固定件连接在顶板的上端面,固定件的自由端延伸至顶板的外侧并设有用于连接紧固组件的锁紧部。本发明提供的无死角人孔结构,改变了传统的盖板结构、盖板结构与人孔底座的连接方式、以及密封件的密封角度,在不改变人孔内径D值的前提下,减小人孔整体高度L值,实现无死角人孔。(The invention provides a dead-corner-free manhole structure, which belongs to the technical field of sealing devices and comprises a manhole base, a cover plate structure and a fixing piece; the manhole base is connected to the container, a supporting platform is arranged on the inner side of the manhole base, an inverted frustum-shaped accommodating cavity is formed in the middle of the supporting platform, and a fastening assembly is arranged on the manhole base; the cover plate structure comprises a top plate and a connecting part connected to the lower end of the top plate, the side wall of the connecting part is attached to the side wall of the accommodating cavity, and a sealing ring is arranged between the connecting part and the accommodating cavity; the fixing piece is connected to the upper end face of the top plate, and the free end of the fixing piece extends to the outer side of the top plate and is provided with a locking portion used for connecting the fastening assembly. The dead-corner-free manhole structure provided by the invention changes the traditional cover plate structure, the connection mode of the cover plate structure and the manhole base and the sealing angle of the sealing element, reduces the integral height L value of the manhole on the premise of not changing the inner diameter D value of the manhole, and realizes the dead-corner-free manhole.)

1. Dead-angle-free manhole structure, comprising:

the manhole base is connected to the end enclosure part of the container, an annular supporting platform is arranged on the inner side of the manhole base, an inverted frustum-shaped accommodating cavity is formed in the middle of the supporting platform, and a fastening assembly is arranged on the manhole base;

the cover plate structure comprises a top plate and a connecting part, the top plate is used for being lapped above the supporting platform, the connecting part is connected to the lower end of the top plate, the side wall of the connecting part is attached to the side wall of the accommodating cavity, and a sealing ring is arranged between the connecting part and the accommodating cavity;

the fixing piece is connected to the upper end face of the top plate, and the free end of the fixing piece extends to the outer side of the top plate and is provided with a locking portion used for being connected with the fastening assembly.

2. Dead-corner-free manhole structure according to claim 1, wherein the upper end of the connecting part is provided with a buffer groove, and the depth direction of the buffer groove is perpendicular to the side wall of the connecting part.

3. The blind corner-free manhole structure of claim 2 wherein the top plate is integrally formed with the attachment portion.

4. The blind-corner-free manhole structure of claim 1, wherein the fastening assemblies are arranged in plurality, and the fastening assemblies are arranged in the circumferential direction of the upper end face of the manhole base at equal intervals.

5. The blind corner-free manhole structure of claim 4, wherein the fastening assembly comprises:

the support lug is connected to the upper end surface of the manhole base;

and the swing bolt is hinged on the support lug and is used for connecting the locking part.

6. The dead-corner-free manhole structure of claim 5, wherein the fixing element is a pressure plate, and the angle between the pressure plate and the top plate is 45 degrees.

7. The blind corner-free manhole structure of claim 6, wherein the plurality of pressure plates are in one-to-one correspondence with the plurality of fastening assemblies.

8. The dead-corner-free manhole structure of claim 7, wherein the lower end surface of the pressure plate is longitudinally projected to be located inside the sealing slot.

9. The dead-angle-free manhole structure of claim 8, wherein the locking portion comprises:

the semicircular groove longitudinally penetrates through the pressing plate;

the abdicating groove is communicated with the semicircular groove and extends to the outer side wall of the pressing plate and the notch of the pressing plate faces the outer side of the pressing plate.

10. Dead-corner-free manhole structure according to claim 9, wherein the upper end surface of the pressure plate is provided with a sunken structure, and the sunken structure is located above the semicircular groove.

Technical Field

The invention belongs to the technical field of sealing devices, and particularly relates to a dead-corner-free manhole structure.

Background

In the field of industries with clean requirements, equipment often needs cleaning work, generally, cleaning in place, namely CIP (cleaning in place), the equipment with CIP requirements generally needs to control the size and the number of dead corners, and the weighing value of the size is the ratio of the length of a dead pipe section to the inner diameter of the pipe, namely L/D, which is specifically illustrated in fig. 1.

The manhole is one of common fittings on a sanitary container, the main function of the manhole is to facilitate people to enter and exit for installation and maintenance, and the size of the common manhole is required to be satisfied with the passing of a human body, so the manhole is generally large in size, namely, the D value is large. As shown in fig. 2, in the conventional design, due to the limitation of the fastening manner and other structures of the manhole cover c, the overhanging height of the manhole, i.e. the L value, is relatively large, but because the D value is also large, the dead angle value L/D is still within the allowable range, but it still has a little room for improvement, i.e. breaks through the limitation of the original structure, which is mainly reflected in:

1. the lower end of the manhole pipe a is welded with the container in an angle joint mode, and a certain welding space, namely a certain extending distance, is needed.

2. The fastener b is side-mounted, and needs a certain space for welding, namely a certain extending distance.

3. The sealing gasket d is arranged outside the flange, and needs a certain installation space for axial sealing.

4. The manhole is covered by the manhole cover c, so that the whole height of the manhole is larger naturally.

Disclosure of Invention

The invention aims to provide a dead-corner-free manhole structure, which aims to solve the problem of larger dead corner value caused by larger extending height of a manhole in the original structure, and ensure that no dead corner is formed during CIP cleaning while ensuring the sealing property.

In order to achieve the purpose, the invention adopts the technical scheme that: there is provided a dead-corner-free manhole structure comprising:

the manhole base is connected to the end enclosure part of the container, an annular supporting platform is arranged on the inner side of the manhole base, an inverted frustum-shaped accommodating cavity is formed in the middle of the supporting platform, and a fastening assembly is arranged on the manhole base;

the cover plate structure comprises a top plate and a connecting part, the top plate is used for being lapped above the supporting platform, the connecting part is connected to the lower end of the top plate, the side wall of the connecting part is attached to the side wall of the accommodating cavity, and a sealing ring is arranged between the connecting part and the accommodating cavity;

the fixing piece is connected to the upper end face of the top plate, and the free end of the fixing piece extends to the outer side of the top plate and is provided with a locking portion used for being connected with the fastening assembly.

As another embodiment of this application, the upper end of connecting portion is provided with the dashpot, the degree of depth direction perpendicular to of dashpot the lateral wall of connecting portion.

As another embodiment of the present application, the top plate is integrally formed with the connection portion.

As another embodiment of this application, the fastening components are a plurality of, and a plurality of fastening components are equidistantly arranged in the circumference of manhole base up end.

As another embodiment of the present application, the fastening assembly includes:

the support lug is connected to the upper end surface of the manhole base;

and the swing bolt is hinged on the support lug and is used for connecting the locking part.

As another embodiment of the present application, the fixing member is a pressing plate, and an included angle between the pressing plate and the top plate is 45 °.

As another embodiment of the present application, the number of the pressing plates is plural, and the plural pressing plates correspond to the plural fastening members one to one.

As another embodiment of the present application, a longitudinal projection of the lower end surface of the pressure plate is located inside the sealing groove.

As another embodiment of the present application, the locking portion includes:

the semicircular groove longitudinally penetrates through the pressing plate;

the abdicating groove is communicated with the semicircular groove and extends to the outer side wall of the pressing plate and the notch of the pressing plate faces the outer side of the pressing plate.

As another embodiment of the application, the upper end face of the pressing plate is provided with a sunken structure, and the sunken structure is located above the semicircular groove.

The dead-angle-free manhole structure provided by the invention has the beneficial effects that: compared with the prior art, the manhole structure without dead angles is characterized in that the sealing ring is arranged on the side wall of the inverted frustum-shaped connecting part, and is stressed in the radial direction and the axial direction under the sealing state, so that the axial installation space of the sealing ring is saved, and the overall height L value of the manhole is reduced; the top plate above the connecting part is lapped on the upper end surface of the supporting platform, and the original arch cover form is abandoned, so that the overall height L value of the cover plate structure is reduced; the fixing piece extending towards the outside is arranged above the top plate, the locking portion of the free end of the fixing piece is connected with the fastening component on the manhole base, the reverse flange is formed, the axial installation space of the fastening component is reduced, the overall height L value of the manhole is reduced, and the manhole without dead angles is realized.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic view of the inside diameter of a manhole with respect to the height of the manhole;

fig. 2 is a schematic structural view of a conventional manhole structure;

figure 3 is a schematic perspective view of a dead-corner-free manhole structure provided by an embodiment of the present invention;

figure 4 is a schematic view of a vertical cross-section of a dead-corner-free manhole structure according to an embodiment of the present invention;

figure 5 is a schematic view of a vertical cross-section of a manhole base according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a cover plate structure according to an embodiment of the present invention;

FIG. 7 is an enlarged view taken at A in FIG. 6;

FIG. 8 is a schematic structural diagram of a platen according to an embodiment of the present invention;

FIG. 9 is a top view of a platen according to an embodiment of the present invention.

In the figure: a. a manhole tube; b. a fastener; c. covering a manhole; d. a gasket; 10. a manhole base; 11. Supporting a lug; 12. an eye bolt; 13. fastening a nut; 14. a support platform; 20. a cover plate structure; 21. pressing a plate; 22. a sealing groove; 23. a buffer tank; 24. a seal ring; 25. a sink type structure.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 3 and 9, a dead-corner-free manhole structure provided by the present invention will now be described. The dead-corner-free manhole structure comprises a manhole base 10, a cover plate structure 20 and a fixing piece; the manhole base 10 is connected to a seal head part of a container, an annular supporting platform 14 is arranged on the inner side of the manhole base 10, an inverted frustum-shaped accommodating cavity is formed in the middle of the supporting platform 14, and a fastening assembly is arranged on the manhole base 10; the cover plate structure 20 comprises a top plate lapped above the supporting platform 14 and a connecting part connected to the lower end of the top plate, the side wall of the connecting part is attached to the side wall of the containing cavity, and a sealing ring 24 is arranged between the connecting part and the containing cavity; the fixing piece is connected to the upper end face of the top plate, and the free end of the fixing piece extends to the outer side of the top plate and is provided with a locking portion used for connecting the fastening assembly.

Compared with the prior art, the manhole structure without dead angles provided by the invention has the advantages that the manhole base 10 is connected to the end enclosure part of the container, the connecting part at the lower part of the cover plate structure 20 extends into the accommodating cavity from top to bottom from the inner side of the supporting platform 14, the side wall of the connecting part is attached to the side wall of the supporting platform 14, and the sealing ring 24 arranged on the side wall of the connecting part is closely attached to the side wall of the supporting platform 14 to realize sealing; in a sealing state, the sealing ring 24 is stressed in the radial direction and the axial direction, so that the axial installation space of the sealing ring 24 is saved, and the overall height L value of the manhole is reduced; the top plate above the connecting part is lapped on the upper end surface of the supporting platform 14, the original arch cover form is abandoned, and the overall height L value of the cover plate structure 20 is reduced; the fixing piece extending towards the outside is arranged above the top plate, the locking part of the free end of the fixing piece is connected with the fastening component on the manhole base 10, a reverse flange is formed, the axial installation space of the fastening component is reduced, the overall height L value of the manhole is reduced, and the manhole without dead angles is realized.

The manhole structure without dead angles changes the traditional cover plate structure 20, the connection mode of the cover plate structure 20 and the manhole base 10 and the sealing angle of a sealing element, and reduces the value L of the integral height of a manhole; on the premise of not changing the inner diameter D value of the manhole, the overall height L value of the manhole is reduced as much as possible, and the dead-corner-free manhole is realized.

Optionally, the manhole base 10 is a flat plate structure, the lower end surface of the manhole base 10 has a hem structure extending to the outside, the lower end surface of the manhole base 10 is butt-welded to the end enclosure part of the container, and the butt-welded seam can be used for detecting the internal volume defect. The outer diameter of the manhole base 10 is greater than the diameter of the closure member of the vessel and the flanging configuration keeps the welding location away from the support platform 14 to reduce the effect of welding distortion on the manhole structure.

Optionally, the wall surface of the side wall of the connecting portion is a sealing surface, the sealing surface is attached to the side wall of the supporting platform 14, the sealing groove 22 is a square groove which is perpendicular to the sealing surface and is recessed towards the inner side of the connecting portion, and the sealing groove 22 limits the sealing ring 24 therein to prevent the sealing ring from axially falling off or sliding.

Optionally, the sealing ring 24 is an O-ring; the diameter of the sealing ring 24 is greater than the depth of the sealing groove 22.

As shown in fig. 6 and 7, the seal groove 22 is opened at a lower portion of the connection portion. The height that the chamber was held to connecting portion highly is less than manhole base 10, and the length of connecting portion lateral wall is less than the length that holds the chamber lateral wall, and seal groove 22 sets up in the lower part of connecting portion to when guaranteeing that apron structure 20 is sealed with manhole base 10, sealing washer 24 in the seal groove 22 corresponds the setting and is holding the middle part in chamber, prevents to seal not tight.

As shown in fig. 6 and 7, the diameter of the top plate is larger than the diameter of the upper end of the connection portion. The diameter of roof is greater than the diameter of connecting portion up end, and the roof overlap joint is on manhole base 10 on supporting platform 14, and the connecting portion of roof below is located and holds the intracavity.

Referring to fig. 6 and 7, as a specific embodiment of the dead-corner-free manhole structure provided by the present invention, a buffer groove 23 is disposed at an upper end of the connecting portion, and a depth direction of the buffer groove 23 is perpendicular to a sidewall of the connecting portion. In this embodiment, the upper end surface of the connecting portion is connected to the top plate, the upper end of the connecting portion is provided with a buffer groove 23, and the buffer groove 23 is perpendicular to the side wall of the connecting portion and extends inward. The buffer groove 23 ensures that the cover plate structure 20 can be perfectly matched with the manhole base 10 after being deformed in the process of machining error or welding, so that the requirements on the machining precision of the cover plate structure 20 and the plate thickness of the cover plate structure 20 are reduced. The buffer groove 23 prevents the cover plate structure 20 from being deformed in the error or welding process in the machining process, so that the connecting part and the side wall of the supporting platform 14 are blocked, and the sealing ring 24 fails.

Optionally, the side wall above the buffer groove 23 is horizontally connected with the lower end surface of the top plate. The cross section of the buffer tank 23 is trapezoidal.

Optionally, the top plate and the connecting portion are integrally formed.

Referring to fig. 3 and 4, as a specific embodiment of the dead-corner-free manhole structure provided by the present invention, a plurality of fastening components are provided, and the fastening components are arranged at equal intervals in the circumferential direction of the upper end surface of the manhole base 10. In this embodiment, the manhole base 10 is an annular plate, the lower end surface of which is connected to the container, the support platform 14 is arranged on the inner side of the annular plate, the upper end surface of the annular plate is provided with a fastening assembly, and the cover plate structure 20 is connected to the fastening assembly by means of a fixing member. A plurality of fastening components are arranged at equal intervals, so that stress points of the cover plate structure 20 are uniformly distributed, and the stress of the cover plate structure 20 is uniform. Specifically, the fastening assemblies are distributed in an annular array, and the center of the annular array is located at the center of the manhole base 10.

Referring to fig. 3 and 4, as an embodiment of the dead-corner-free manhole structure provided by the present invention, the fastening assembly includes a support lug 11 connected to the upper end surface of the manhole base 10 and a swing bolt 12 hinged to the support lug 11, wherein the swing bolt 12 is used for connecting the locking part. In this embodiment, the support lug 11 is U-shaped, the closed end of the support lug 11 is welded to the upper end surface of the manhole base 10, hinge holes are formed in two side walls of the support lug 11, and the swing bolt 12 is connected to the hinge holes in the two side walls of the support lug 11 by means of a hinge shaft.

Specifically, when the cover structure 20 is opened, the swing bolt 12 hinged on the lug 11 is in a horizontal state, and the free end of the swing bolt 12 faces the outside of the manhole base 10; when the cover structure 20 is placed on the manhole base 10, the fixing pieces correspond one-to-one to the swing bolts 12, the swing bolts 12 hinged on the lugs 11 are rotated, the swing bolts 12 are rotated to the fixing pieces, and are connected with the fixing pieces by means of the fastening nuts 13. Alternatively, the fixture is provided with bolt holes through which eye bolts 12 extend and the cover structure 20 is attached to the manhole base 10 by means of fastening nuts 13. The fastening nut 13 is rotated. The tightening nut 13 applies a downward force to the pressure plate 21 and the cover structure 20 to ensure that a seal is achieved between the cover structure 20 and the manhole base 10.

As a specific embodiment of the dead-corner-free manhole structure provided by the present invention, please refer to fig. 4 and 8, the fixing element is a pressing plate 21, and an included angle between the pressing plate 21 and the top plate is 45 °. In this embodiment, the end of the top plate is welded with a pressing plate 21, the pressing plate 21 extends from bottom to top along the radial direction of the top plate to the outside, the included angle between the length direction of the pressing plate 21 and the top plate is 45 °, and the upper end of the pressing plate 21 extends to the outside of the top plate. The manhole base 10 is connected with the pressure plate 21 through bolts, the pressure plate 21 applies downward force to the top plate under the action of the bolts, the top plate is pressed downwards, and the connecting part and the manhole base 10 are sealed through the sealing ring 24.

Optionally, the included angle between the pressing plate 21 and the top plate can be adjusted according to actual requirements.

Referring to fig. 3 and 4, as an embodiment of the dead-corner-free manhole structure provided by the present invention, a plurality of pressure plates 21 are provided, and a plurality of pressure plates 21 correspond to a plurality of fastening components one to one. In this embodiment, the plurality of pressing plates 21 are arranged on the upper end surface of the top plate in an annular array, and the circle center of the annular array is consistent with the center of the top plate. The manhole base 10 is provided with bolt connectors connected with the pressure plate 21, and the bolt connectors are arranged in one-to-one correspondence with the pressure plate 21. The number of the pressing plates 21 is determined by the pressure-bearing capacity of the manhole design. The pressing plate 21 and the bolts form a reverse bolt locking structure, so that the axial space of the manhole structure is saved, and dead angles are reduced.

Optionally, the lower end surface of the pressure plate 21 is longitudinally projected to be located inside the sealing groove 22. The force applied by the pressure plate 21 to the top plate falls into the inner side of the sealing groove 22, so that the circumferential force of the sealing groove 22 is uniform.

As an embodiment of the dead-corner-free manhole structure provided by the present invention, please refer to fig. 8 and 9, the locking portion includes a semicircular groove longitudinally penetrating through the pressing plate 21 and an abdicating groove communicating with the semicircular groove, the abdicating groove extends to the outer side wall of the pressing plate 21, and the notch faces the outer side of the pressing plate 21. In this embodiment, the locking portion is located at one end of the pressing plate 21 away from the top plate, a longitudinal semicircular groove and an abdicating groove communicating the semicircular groove are provided on the locking portion, the swing bolt 12 rotates upward around the hinge shaft, and enters the semicircular groove through the abdicating groove until the side wall of the swing bolt 12 is attached to the side wall of the semicircular groove, at this time, the swing bolt 12 is in a vertical state, the fastening nut 13 is fixed at the end of the swing bolt 12, and downward force is applied to the pressing plate 21 and the cover plate structure 20 by rotating the fastening nut 13, so that the cover plate structure 20 and the manhole base 10 are sealed.

As a specific embodiment of the dead-corner-free manhole structure provided by the present invention, please refer to fig. 9, a sunken structure 25 is disposed on the upper end surface of the pressing plate 21, and the sunken structure 25 is located above the semi-circular groove. In this embodiment, the upper end surface of the pressing plate 21 is provided with a sunken structure 25 for preventing the fastening nut 13 from slipping, and the sunken structure 25 is located above the semicircular groove. The sunken structure 25 is circular and has an inner diameter greater than that of the semicircular groove. The fastening nut 13 is rotated to fall into the sunken structure 25 to be limited, and is prevented from sliding towards the yielding groove.

Optionally, a support seat is arranged below the pressing plate 21, and the cross-sectional area of the support seat is larger than that of the pressing plate 21, so that the connection strength between the pressing plate 21 and the top plate is improved.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.