CN111188902B - Non-bolt pre-tightening self-tightening manhole device - Google Patents
Non-bolt pre-tightening self-tightening manhole device Download PDFInfo
- Publication number
- CN111188902B CN111188902B CN202010041437.5A CN202010041437A CN111188902B CN 111188902 B CN111188902 B CN 111188902B CN 202010041437 A CN202010041437 A CN 202010041437A CN 111188902 B CN111188902 B CN 111188902B
- Authority
- CN
- China
- Prior art keywords
- tightening
- manhole
- manhole cover
- magnet
- self
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J13/00—Covers or similar closure members for pressure vessels in general
- F16J13/02—Detachable closure members; Means for tightening closures
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pressure Vessels And Lids Thereof (AREA)
Abstract
The invention discloses a non-bolt pre-tightening self-tightening manhole device which comprises a sealing head, a manhole cover, a hard magnet, a soft magnet and an O-shaped sealing ring, wherein an opening is formed in the sealing head, the manhole cover is nested in the opening, the bottom surface of the manhole cover is attached to the inner surface of the sealing head and is provided with the O-shaped sealing ring, the soft magnet is arranged on the manhole cover, the hard magnet is arranged on the sealing head, and the hard magnet is matched with the soft magnet. The non-bolt pre-tightening self-tightening manhole can realize sealing of the manhole without welding or bolt connection, can realize the conversion between the suction working state and the repulsion working state of the manhole cover and the end socket only by providing instantaneous current by an external power supply, is safe and reliable, does not have the safety problem caused by power failure and magnetic loss, has better sealing effect along with the increase of internal pressure, and has great popularization prospect and social requirements.
Description
Technical Field
The invention relates to the technical field of manhole devices, in particular to a non-bolt pre-tightening self-tightening manhole device.
Background
The pressure container is a pressure-bearing closed container, and the inside of the pressure container bears larger pressure in the use process. In order to facilitate the regular inspection and maintenance of the interior, a manhole device needs to be arranged on the pressure vessel for people to enter and exit. A manhole refers to an open structure for personnel to enter and exit equipment for installation, maintenance, and safety inspection. Mainly comprises a short cylinder section (or a short pipe), a flange and a manhole cover with a handle. In view of safety inspection, the manhole cover is fixed by a revolving cover and a hanging cover. According to the pressure container structure, because the internals are less at the head, a plurality of manholes are arranged on the head. The conventional manhole device needs to install a short shell section after a shell (such as a seal head) is perforated, and then adopts structures such as a sealing ring and a manhole cover, so that sealing is realized under the working condition under the action of a large number of bolts, and the manhole cover can be opened during maintenance, so that an operator can enter the container.
Because the short cylinder sections are welded at the opening of the seal head, the stress state of the whole seal head is changed. Therefore, the stress is poor, and the analysis design needs to be mainly considered. Further, since bolts are used to provide the force required for sealing, a greater number of bolts and a larger diameter of bolts are required as the internal pressure increases. The larger the number of bolts and the larger the diameter of the bolts, the cost is increased, and the time required for opening and closing the manhole is increased. The longer the down time in the plant overhaul, the longer the production downtime and the greater the economic losses.
Disclosure of Invention
The invention aims to provide a non-bolt pre-tightening self-tightening manhole device, which solves the problems in the prior art, realizes self-tightening sealing and disassembly between a manhole cover and an end enclosure through magnetic force, and saves the time for opening and closing the manhole cover.
In order to achieve the purpose, the invention provides the following scheme:
the invention provides a non-bolt pre-tightening self-tightening manhole device which comprises a sealing head, a manhole cover, a hard magnet, a soft magnet and an O-shaped sealing ring, wherein an opening is formed in the sealing head, the manhole cover is nested in the opening, the bottom surface of the manhole cover is attached to the inner surface of the sealing head, the O-shaped sealing ring is arranged on the bottom surface of the manhole cover, the soft magnet is arranged on the manhole cover, the hard magnet is arranged on the sealing head, and the hard magnet is matched with the soft magnet.
Preferably, the hard magnets are annular permanent magnets and are embedded on the inner surface of the end socket, and the soft magnets are uniformly distributed in an annular shape.
Preferably, a magnetic isolation steel plate is arranged between the permanent magnet and the inner surface of the end socket.
Preferably, the radius of the O-shaped sealing ring is larger than that of the permanent magnet, the O-shaped sealing ring is arranged in a groove of the manhole cover, and the groove is matched with the tenon surface on the end socket.
Preferably, a plurality of the soft magnets are sequentially connected in series through cables and connected with a power interface, and the power interface is used for connecting a power supply with changeable electrodes.
Preferably, the soft magnet comprises a soft magnet core and a coil, the coil is wound on the soft magnet core, and an epoxy resin magnetism isolating layer is poured between the soft magnet core and the manhole cover.
Preferably, the outer surface of the manhole cover is provided with a lifting lug, and the lifting lug is used for being connected with hoisting equipment.
Preferably, the inner surface of the manhole cover is connected with one end of a chain, and the other end of the chain is connected in the sealing head.
Compared with the prior art, the invention has the following technical effects:
the non-bolt pre-tightening self-tightening manhole can realize sealing of the manhole without welding or bolt connection, can realize the conversion between the suction working state and the repulsion working state of the manhole cover and the end socket only by providing instantaneous current by an external power supply, is safe and reliable, does not have the safety problem caused by power failure and magnetic loss, has better sealing effect along with the increase of internal pressure, and has great popularization prospect and social requirements.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments 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 structural view of a non-bolt-pre-tensioned self-tightening manhole device according to the present invention;
figure 2 is an enlarged partial view of a portion of figure 1 of the non-bolt-pretensioning self-tightening manhole apparatus of the invention;
figure 3 is a schematic top view of a non-bolt-pre-tensioned self-tightening manhole assembly according to the present invention;
wherein: 1-end enclosure, 2-manhole cover, 3-chain, 4-lifting lug, 5-O-shaped sealing ring, 6-magnetism isolating layer, 7-power interface, 8-cable, 9-hard magnet, 10-groove, 11-tenon surface, 12-magnetism isolating steel plate, 13-coil and 14-soft magnetic core.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.
The invention aims to provide a non-bolt pre-tightening self-tightening manhole device, which solves the problems in the prior art, realizes self-tightening sealing and disassembly between a manhole cover and an end enclosure through magnetic force, and saves the time for opening and closing the manhole cover.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 1 to 3: the embodiment provides a self-tightening manhole device pre-tightened by a non-bolt, which comprises a sealing head 1, a manhole cover 2, a hard magnet 9, a soft magnet and an O-shaped sealing ring 5, wherein a hole is formed in the sealing head 1, the manhole cover 2 is embedded in the hole, the bottom surface of the manhole cover 2 is attached to the inner surface of the sealing head 1 and is provided with the O-shaped sealing ring 5, the soft magnet is arranged on the manhole cover 2, the hard magnet 9 is arranged on the sealing head 1, and the hard magnet 9 is matched with the soft magnet.
The hard magnet 9 is an annular permanent magnet and is embedded on the inner surface of the end socket 1, and a magnetic isolation steel plate 12 is arranged between the permanent magnet and the inner surface of the end socket 1 to prevent the magnetic force line from spreading to other positions of the end socket 1. The radius of the O-shaped sealing ring 5 is larger than that of the permanent magnet, the O-shaped sealing ring 5 is arranged in a groove 10 of the manhole cover 2 and is made of rubber, and the groove 10 is matched with the tenon surface 11 on the end socket 1.
The soft magnets are annularly and uniformly distributed and provided with a plurality of soft magnets, the soft magnets are sequentially connected in series through cables 8 and are connected with a power interface 7, and the power interface 7 is used for connecting a power supply with changeable electrodes. The soft magnet comprises a soft magnet core 14 and a coil 13, the coil 13 is wound on the soft magnet core 14, and a magnetic isolation layer 6 made of epoxy resin is poured between the soft magnet and the manhole cover 2 to prevent the magnetic force from spreading to other positions of the manhole cover 2. The solidification magnet of this embodiment is holistic annular structure, can ensure the initial sealed magnetic attraction that relies on hard magnet 9 to provide of manhole cover 2, and soft magnet is the matching that can make things convenient for and hard magnet 9 of annular equipartition, does not have the problem of assembly angle in the hoop, and is safe, reliable, can not take place the problem of outage demagnetization.
A lifting lug 4 is arranged on the outer surface of the manhole cover 2, and the lifting lug 4 is used for being connected with hoisting equipment. The inner surface of the manhole cover 2 is connected with one end of a chain 3, and the other end of the chain 3 is connected in the sealing head 1, so that the manhole cover 2 can be lifted when being detached.
The specific use process of this embodiment is as follows:
firstly, an instantaneous current is introduced into a coil 13 of the soft magnet on the manhole cover 2, the current intensity grade can be determined through calculation, and if the end socket 1 and the manhole cover 2 are made of materials which cannot be attracted by the magnet, the magnetic force of the soft magnet is eliminated by electrifying; if the end socket 1 and the manhole cover 2 are made of materials that can be attracted by the magnet, the magnetic force (repulsive force) of the soft magnet is to be offset from the attraction force of the end socket 1 and the manhole cover 2 by electrifying. After the magnetic force is offset, the manhole cover 2 is lifted by a worker or a crane according to the size and weight of the manhole cover. After the hoisting is in place, an instantaneous current is introduced into the coil 13, so that the soft magnet has magnetic force (changing the direction of the magnetic pole) attracting the permanent magnet 9, and the manhole cover 2 is sealed under the mutual attraction of the permanent magnet 9 and the soft magnet. Due to the structural limitation, the manhole cover 2 can be installed in place in one step in the axial direction and the radial direction, the installation is very convenient to take place, the O-shaped sealing ring 5 can be flattened into an oval shape by the pretightening force provided by the large magnetic force and can be tightly attached to the groove of the mortise sealing structure, and the sealing is realized. Meanwhile, with the gradual increase of the internal medium, the pressure on the inner side of the manhole cover 2 is gradually higher than that on the outer side of the manhole cover 2, the O-shaped sealing ring 5 is continuously extruded to deform, the sealing effect is better when the pressure is higher, and the sealing effect is better, namely the self-tightening sealing. At this time, the person or equipment hanging or hanging the manhole cover 2 from the outside can be evacuated, and the work of installing the manhole cover 2 is completed.
When the equipment needs to be overhauled, the medium in the equipment is emptied and is recovered to the normal pressure state. At the moment, instantaneous current opposite to the direction of an electrode during installation and magnetization is introduced into the coil 13, the magnetic pole direction of the soft magnet is changed, so that repulsion force is generated between the soft magnet and the permanent magnet, the manhole cover 2 is pushed away from the inner wall of the end enclosure 1, and then the manhole cover is hung on the chain 3 in the end enclosure 1; and after the overhaul is finished, repeating the operation to finish the installation and the sealing again.
The self-tightening manhole of non-bolt pretension of this embodiment, do not need welding or bolted connection can realize the sealed of manhole, only need external power source to provide the opposite instantaneous current of polarity, just can realize the transformation of attraction and repulsion operating condition between manhole cover 2 and head 1, and only need provide the instantaneous current when opening operating condition, follow-up no longer needs the power, and because adopt the seal structure of self-tightening formula, sealed effect is better along with the increase of interior pressure, only need guarantee initial sealed magnetic attraction can, so not very big to the quantity requirement of magnet, consequently, have very big popularization prospect and social demand.
The principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above descriptions of the examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (7)
1. A non-bolt pre-tightening self-tightening manhole device is characterized in that: the sealing head is provided with an opening, the manhole cover is nested in the opening, the bottom surface of the manhole cover is attached to the inner surface of the sealing head and is provided with the O-shaped sealing ring, the soft magnet is arranged on the manhole cover, the hard magnet is arranged on the sealing head, and the hard magnet is matched with the soft magnet; the soft magnet comprises a soft magnet core and a coil, the coil is wound on the soft magnet core, and a magnetic isolation layer made of epoxy resin is poured between the soft magnet and the manhole cover.
2. A non-bolt pre-tensioned self-tightening manhole device as claimed in claim 1, wherein: the hard magnet is an annular permanent magnet and is embedded on the inner surface of the end socket, and a plurality of soft magnets are uniformly distributed in an annular shape.
3. A non-bolt pre-tensioned self-tightening manhole device as claimed in claim 2, wherein: and a magnetic isolation steel plate is arranged between the permanent magnet and the inner surface of the end socket.
4. A non-bolt pre-tensioned self-tightening manhole device as claimed in claim 2, wherein: the radius of the O-shaped sealing ring is larger than that of the permanent magnet, the O-shaped sealing ring is arranged in a groove of the manhole cover, and the groove is matched with the tenon surface on the end socket.
5. A non-bolt pre-tensioned self-tightening manhole device as claimed in claim 2, wherein: the soft magnets are sequentially connected in series through cables and connected with a power interface, and the power interface is used for connecting a power supply with changeable electrodes.
6. A non-bolt pre-tensioned self-tightening manhole device as claimed in claim 1, wherein: the outer surface of the manhole cover is provided with a lifting lug which is used for being connected with hoisting equipment.
7. A non-bolt pre-tensioned self-tightening manhole device as claimed in claim 1, wherein: the inner surface of the manhole cover is connected with one end of a chain, and the other end of the chain is connected into the sealing head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010041437.5A CN111188902B (en) | 2020-01-15 | 2020-01-15 | Non-bolt pre-tightening self-tightening manhole device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010041437.5A CN111188902B (en) | 2020-01-15 | 2020-01-15 | Non-bolt pre-tightening self-tightening manhole device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111188902A CN111188902A (en) | 2020-05-22 |
| CN111188902B true CN111188902B (en) | 2021-06-29 |
Family
ID=70706244
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010041437.5A Active CN111188902B (en) | 2020-01-15 | 2020-01-15 | Non-bolt pre-tightening self-tightening manhole device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111188902B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207045617U (en) * | 2017-08-18 | 2018-02-27 | 舟山琦盛船舶配件有限公司 | Novel manhole cover |
| CN108468803A (en) * | 2018-05-22 | 2018-08-31 | 西华大学 | A kind of cuboid-type normal pressure pressure vessel |
| KR101908536B1 (en) * | 2014-06-10 | 2018-10-16 | 어플라이드 머티어리얼스, 인코포레이티드 | Closure or airlock device for a vacuum chamber and method for closing a vaccum chamber opening using the same |
| CN209278476U (en) * | 2018-12-10 | 2019-08-20 | 天津市茂联科技有限公司 | A kind of storage tank inspection hole sealing device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB0205878D0 (en) * | 2002-03-13 | 2002-04-24 | British Nuclear Fuels Plc | Valve |
-
2020
- 2020-01-15 CN CN202010041437.5A patent/CN111188902B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101908536B1 (en) * | 2014-06-10 | 2018-10-16 | 어플라이드 머티어리얼스, 인코포레이티드 | Closure or airlock device for a vacuum chamber and method for closing a vaccum chamber opening using the same |
| CN207045617U (en) * | 2017-08-18 | 2018-02-27 | 舟山琦盛船舶配件有限公司 | Novel manhole cover |
| CN108468803A (en) * | 2018-05-22 | 2018-08-31 | 西华大学 | A kind of cuboid-type normal pressure pressure vessel |
| CN209278476U (en) * | 2018-12-10 | 2019-08-20 | 天津市茂联科技有限公司 | A kind of storage tank inspection hole sealing device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111188902A (en) | 2020-05-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111188902B (en) | Non-bolt pre-tightening self-tightening manhole device | |
| CN114323802B (en) | Offshore wind farm water resource environment inspection sampling device | |
| CN110323696A (en) | A kind of elbow-type end packaging type removal tool | |
| CN201786241U (en) | Top drive device directly driven by motor | |
| CN201627560U (en) | Device for fracturing wellhead | |
| CN216077040U (en) | Tool-free detachable pumping wellhead sealing device | |
| CN104695889A (en) | Integrated blowout preventer for non-well killing operation machine | |
| CN212867635U (en) | Magnetic induction type automatic drainage device of underground coal mine air pump | |
| CN202100265U (en) | Suspended hydraulic prop easy to load and unload and detaching device thereof | |
| CN211312439U (en) | Hydraulic engineering is with gate of preapring for an unfavorable turn of events shape | |
| CN209144871U (en) | A kind of inside water proof structure of cast-in-place inspection shaft comb interface | |
| CN208917788U (en) | Segmented refuelling pool sluice gate for nuclear power plant | |
| CN206554896U (en) | Oil swabbing and taking well well head safe control device | |
| CN212859294U (en) | Device for replacing sealing gasket of pipeline flange | |
| CN220521302U (en) | Pile casing for bored pile | |
| CN220266549U (en) | Steel-pipe pile buoyancy is from pulling out device | |
| CN214616521U (en) | Underwater ore sand mining device | |
| CN220845251U (en) | Magnetic attraction type marine winch | |
| CN214754910U (en) | A modularization centralized control room for ground soaks uranium mining mine | |
| CN215854579U (en) | Tube shaft type lifting lug | |
| CN207063678U (en) | A kind of 45 degree of deflecting plates for group tower construction | |
| CN212407967U (en) | Pile top plugging device for end face sealing of steel pipe pile | |
| RU2805701C1 (en) | Method for installing preventer on support flange of wellhead assembly and constant tripping out two-lift arrangement of downhole equipment from well and device for its implementation | |
| CN212506422U (en) | Hidden rings anticorrosion protection device of concrete apron | |
| CN202570348U (en) | First-level automatic double-flap wind blockage valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |