CN112032750A - Steel inner cylinder chimney in flange-free flexible sealing connection - Google Patents
Steel inner cylinder chimney in flange-free flexible sealing connection Download PDFInfo
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- CN112032750A CN112032750A CN202011048840.7A CN202011048840A CN112032750A CN 112032750 A CN112032750 A CN 112032750A CN 202011048840 A CN202011048840 A CN 202011048840A CN 112032750 A CN112032750 A CN 112032750A
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- inner cylinder
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J11/00—Devices for conducting smoke or fumes, e.g. flues
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
- E04H12/28—Chimney stacks, e.g. free-standing, or similar ducts
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J13/00—Fittings for chimneys or flues
- F23J13/02—Linings; Jackets; Casings
- F23J13/025—Linings; Jackets; Casings composed of concentric elements, e.g. double walled
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Chimneys And Flues (AREA)
Abstract
The invention discloses a steel inner cylinder chimney in flange-free flexible sealing connection, which comprises: the inner cylinder is formed by splicing an upper section of inner cylinder and a lower section of inner cylinder, the outer cylinder is formed by splicing an upper section of outer cylinder and a lower section of outer cylinder, the upper section of inner cylinder and the lower section of inner cylinder are connected through a telescopic elastic sleeve component, the telescopic elastic sleeve component consists of a spring component and a movable cylinder section, the spring component comprises a pull rod fixing piece, a pull rod and a pull rod guide piece, a compression spring is sleeved on the pull rod, and a locking nut is installed after the lower end of the pull rod penetrates through the pull rod guide piece; the movable cylinder section comprises a movable cylinder section straight section and a movable cylinder section conical section, an inverted cone-shaped cylinder completely matched with the movable cylinder section conical section is arranged at the top end of the lower section inner cylinder, and after the upper section inner cylinder and the lower section inner cylinder are installed, the movable cylinder section conical section is tightly pressed and attached to the inner side wall of the inverted cone-shaped cylinder under the action of the compression spring. The invention avoids the flange installation of the inner cylinder, reduces the installation time and improves the installation efficiency.
Description
Technical Field
The invention relates to the technical field of steel structure chimneys, in particular to a steel inner cylinder chimney in flange-free flexible sealing connection.
Background
At present, in the field of chimneys, especially in industrial chimneys, a sleeve type chimney structure is generally adopted when the height is below 120m, and is divided into multiple sections (generally 10-15 m), prefabricated in a factory and then transported to a site for hoisting. Here, 2 main problems need to be solved: 1. the connection problem between the inner cylinders of the segments can affect the later operation quality of the chimney and the economical efficiency and safety of installation, and 2. the problem of the wall thickness of the inner cylinders can affect the overall economical efficiency of the chimney.
The prior art situations can be divided into the following categories:
1. the inner steel cylinder of each section adopts a welding connection mode: this method is time-consuming and labor-consuming, and personnel must weld the inner cylinder at the segment position in high altitude, which requires enough operating space, and the upper segment of the cylinder section must be lifted by a crane for a long time, which obviously has poor economy and safety, and is not suitable for the connection and installation of the sleeve type chimney.
2. The steel inner cylinders of all the sections adopt a flange connection mode, the installation and connection of the sleeve type chimney almost adopt the mode at present, and the specific flange connection is divided into a fixed flange connection, a loop type flange connection, a plug-in type flange connection and the like. And the flange joint of these forms all needs the operation personnel to spend a long time locking bolt, and the condition still needs personnel to get into to go to lock the bolt between the interior urceolus a bit, and efficiency of construction is not high, and the security is relatively poor, and fixed flange joint and loop formula flange joint still can appear leaking water, the gas leakage problem, and chimney integral performance quality is difficult to obtain the guarantee.
3. Wall thickness of the inner smoke discharge cylinder: the existing sleeve type chimney is characterized in that an inner cylinder fixing bearing point is arranged at the bottom of an outer cylinder, the upper part is movably supported and connected with the outer cylinder, the outer cylinder does not bear the weight of the inner cylinder, the bottom of the inner cylinder bears the weight of all the inner cylinders and accessories of the inner cylinders, the inner cylinder is connected by a fixed flange and a loop type flange, the joint of the inner cylinders is rigid in a subsection mode, the bending deformation of the inner cylinder can be transferred to the bottom, the lower part of the wall of the inner cylinder is thicker than the upper part in design, and the holes of general pipe orifices can be opened at the lower part, therefore, the lower part of the wall of the inner cylinder is required to be reinforced, the general steel inner cylinder can adopt corrosion-resistant stainless steel or titanium steel, the wall thickness is increased to equal to the.
Disclosure of Invention
The invention mainly solves the technical problem of providing the steel inner cylinder chimney in the flange-free flexible sealing connection, which is convenient to install, avoids the flange installation of the inner cylinder, greatly reduces the installation time and improves the installation efficiency.
In order to solve the technical problems, the invention adopts a technical scheme that: a steel inner barrel chimney with flangeless flexible sealing connection, comprising: the outer barrel is formed by splicing a plurality of upper sections of inner barrels and lower sections of outer barrels, each upper section of inner barrel and each lower section of inner barrel are fixedly connected with the corresponding outer barrel, the upper sections of inner barrels and the lower sections of inner barrels are connected through telescopic elastic sleeve components, each telescopic elastic sleeve component consists of a spring component and a movable barrel section, each spring component comprises a pull rod fixing piece arranged on the outer side of the upper section of inner barrel, a pull rod welded on the pull rod fixing piece and a pull rod guide piece arranged on the outer side of the movable barrel section, a compression spring is sleeved on each pull rod, and a locking nut is installed after the lower end of each pull rod guide piece penetrates through the corresponding pull rod guide piece; the movable cylinder section comprises a movable cylinder section straight section sleeved on the outer side of the upper section inner cylinder and a movable cylinder section conical section positioned at the lower end of the movable cylinder section straight section, an inverted cone-shaped cylinder completely matched with the movable cylinder section conical section is arranged at the top end of the lower section inner cylinder, and after the upper section inner cylinder and the lower section inner cylinder are installed, the movable cylinder section conical section is tightly pressed and attached to the inner side wall of the inverted cone-shaped cylinder under the action of the compression spring.
In a preferred embodiment of the invention, the movable cylinder section is sleeved outside the lower end of the upper section inner cylinder, and the gap between the movable cylinder section and the lower end of the upper section inner cylinder is 2-3 mm.
In a preferred embodiment of the invention, an air blocking cover is arranged at the middle position of the outer side of the upper section inner cylinder.
In a preferred embodiment of the invention, the gas blocking cover is divided into two half structures which are respectively welded with the side wall of the upper section inner cylinder.
In a preferred embodiment of the present invention, a flexible sealing material is filled between the gas-blocking cover and the outer sidewall of the upper-section inner cylinder.
In a preferred embodiment of the invention, the inner side of the middle part of the straight section of the movable cylinder section is welded with an air blocking ring.
In a preferred embodiment of the present invention, a sealing ring is welded on the outer side of the middle part of the straight section of the movable cylinder section, and after the upper section inner cylinder and the lower section inner cylinder are installed, the inverted cone-shaped cylinder at the top end of the lower section inner cylinder abuts against the lower end surface of the sealing ring.
In a preferred embodiment of the invention, the spring assemblies comprise 3-4 groups and are uniformly distributed along the circumferential direction of the upper-section inner cylinder.
In a preferred embodiment of the present invention, the movable cylindrical section conical section is integrally formed at the lower end of the movable cylindrical section straight section.
In a preferred embodiment of the present invention, the upper section outer cylinder and the lower section outer cylinder are connected by a flange.
The invention has the beneficial effects that: the installation is convenient, the flange installation of the inner cylinder is omitted, the installation time is greatly reduced, and the installation efficiency is improved; in addition, the technical scheme of the steel inner cylinder chimney with the flange-free flexible sealing connection enables the wall thickness of the inner cylinder to be irrelevant to the total height of the chimney, the design of the inner cylinder to be simple, the material of the inner cylinder to be reduced, and the production cost to be saved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without inventive efforts, wherein:
FIG. 1 is a schematic view of the assembly structure of a steel inner cylinder chimney of a flangeless flexible sealing connection of the present invention;
FIG. 2 is a schematic view of the assembled structure of the upper inner cylinder and the telescopic elastic sleeve assembly in the drawing;
FIG. 3 is a schematic structural view of the lower section of the inner cylinder in the drawing.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-3, a steel inner cylinder chimney with no flange flexible sealing connection comprises: the inner cylinder 1 and the outer cylinder 2 sleeved on the periphery of the inner cylinder are formed by splicing a plurality of upper-section inner cylinders 11 and lower-section inner cylinders 12, the outer cylinder is formed by splicing a plurality of upper-section outer cylinders 21 and lower-section outer cylinders 22, in a specific embodiment, the upper-section outer cylinders and the lower-section outer cylinders can be connected through flanges, each upper-section inner cylinder and each lower-section inner cylinder are fixedly connected with the corresponding outer cylinder, the upper-section inner cylinders and the lower-section inner cylinders are connected through telescopic elastic sleeve components, each telescopic elastic sleeve component consists of 3-4 groups of spring components and movable cylinder sections 4, the spring components are uniformly distributed along the circumferential direction of the upper-section inner cylinders, each spring component 3 comprises a pull rod fixing part 31 welded on the outer side of the upper-section inner cylinder, a pull rod 32 welded on the pull rod fixing part and a pull rod guide part 33 welded on the outer side of the movable cylinder, and the lower end of the pull rod penetrates through the pull rod guide part and then is fixedly installed by using a locking nut 35, the movable cylinder section 4 comprises a movable cylinder section straight section 41 sleeved outside the upper section inner cylinder and a movable cylinder section conical section 42 integrally formed at the lower end of the movable cylinder section straight section, the top end of the lower section inner cylinder 12 is provided with an inverted cone-shaped cylinder 121 completely matched with the movable cylinder section conical section 42, and after the upper section inner cylinder and the lower section inner cylinder are installed, the movable cylinder section conical section is tightly pressed and attached to the inner side wall of the inverted cone-shaped cylinder under the action of a compression spring.
Specifically, the movable cylinder section and the lower end of the upper section inner cylinder are sleeved and assembled, the gap is generally 2-3 mm, in order to avoid air leakage, an air blocking cover 5 needs to be welded at the lower end of the inner cylinder, in an initial state, the lower portion of the air blocking cover covers about 20mm of the upper section of the movable cylinder section, 2-3 mm of the gap is reserved, the air blocking cover is divided into two half structures and is respectively welded with the side wall of the upper section inner cylinder, the longitudinal split seam between the two half air blocking covers does not need to be welded, after the chimney is installed in each section, and when smoke is exhausted in operation, the temperature expansion of the inner cylinder can drive the movable cylinder section to move upwards, the upper section of the movable cylinder section can push against the air blocking cover by the movement amount, and in order to enable the air blocking cover to have slight expansion, the air blocking cover is of the two half structures, and the longitudinal split.
In order to improve the sealing property, the smoke does not escape from the gap of the gas blocking cover, and a flexible sealing material, such as a ceramic fiber rope, is filled between the gas blocking cover and the outer side wall of the upper section inner cylinder, and the diameter of the flexible sealing material is generally 6-8 mm.
Specifically, the gas blocking ring 6 is welded on the inner side of the middle part of the straight section of the movable shell ring, so that the problem that smoke gas directly rushes into a gap between the movable shell ring and the inner shell wall is avoided, and the smoke gas leakage can be further prevented.
Specifically, the cone section at the lower end of the movable cylinder section is completely matched with the inverted cone-shaped cylinder at the top end of the lower section inner cylinder, after the upper section inner cylinder and the lower section inner cylinder are installed, the cone section of the movable cylinder section can be tightly pressed on the inner wall of the inverted cone-shaped cylinder under the action of the compression spring to form a sealing cone-shaped surface with the width of about 100mm, and preferably, during operation, sealant is coated on the surface of the cone section of the movable cylinder section, so that the air tightness of connection of the inner cylinders can be further enhanced.
Specifically, sealing ring 7 needs to be welded on the outer side of the middle part of the straight section of the movable shell ring, the sealing effect is further guaranteed, after the installation is finished, the conical section of the movable shell ring is tightly matched with the inverted conical shell wall, the inverted conical shell on the top end of the lower segment inner shell is tightly abutted to the lower end face of the sealing ring, and a leakage-proof line is formed on the outer side.
In the invention, the air blocking ring inside the movable shell ring and the external sealing ring can also play a role in reinforcing and rounding the movable shell ring, thereby being more beneficial to the matching and moving relationship between the movable shell ring and the inner cylinder.
It should be noted that, because the inner cylinder of each section of chimney is fixed on the outer cylinder wall of the section, and the weight of the inner cylinder of the section is borne on the outer cylinder wall, for the inner cylinder wall of each section, the maximum axial pressure or tensile force is only the weight of the section, which is irrelevant to the height of the chimney, and because the connection between the upper and lower sections of the inner cylinder of each section is the connection of the telescopic elastic sleeve components, the inner cylinder is flexible and can not transmit bending moment.
Therefore, the design of the inner cylinder wall only needs to consider the corrosion allowance and the axial force generated by the weight of the section, and the general section does not exceed 15m, so the axial force is very small, and the general minimum wall thickness is enough to resist, so the same minimum wall thickness can be adopted for the whole inner cylinder of the chimney, for example, the inner cylinder with the diameter of 2.5m and the sleeve type chimney with the total height of 80m, and the inner cylinder can adopt the wall thickness of 3mm (under the conventional corrosion consideration condition), and under the prior art, the inner cylinder at least needs the wall thickness of 6-8 mm to meet the strength requirement, the inner cylinder considers the corrosion resistance, and generally selects expensive materials such as stainless steel, titanium steel and the like.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by the present specification, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A steel inner barrel chimney with flangeless flexible sealing connection, comprising: the outer barrel is formed by splicing a plurality of upper sections of inner barrels and lower sections of inner barrels, the upper sections of inner barrels and the lower sections of inner barrels are connected through telescopic elastic sleeve assemblies, each telescopic elastic sleeve assembly consists of a spring assembly and a movable barrel section, each spring assembly comprises a pull rod fixing piece arranged on the outer side of the upper section of inner barrel, a pull rod welded on the pull rod fixing piece and a pull rod guide piece arranged on the outer side of the movable barrel section, a compression spring is sleeved on each pull rod, and a locking nut is installed after the lower end of each pull rod guide piece penetrates through the corresponding pull rod guide piece; the movable cylinder section comprises a movable cylinder section straight section sleeved on the outer side of the upper section inner cylinder and a movable cylinder section conical section positioned at the lower end of the movable cylinder section straight section, an inverted cone-shaped cylinder completely matched with the movable cylinder section conical section is arranged at the top end of the lower section inner cylinder, and after the upper section inner cylinder and the lower section inner cylinder are installed, the movable cylinder section conical section is tightly pressed and attached to the inner side wall of the inverted cone-shaped cylinder under the action of the compression spring.
2. The steel inner cylinder chimney in the flangeless flexible sealing connection mode as claimed in claim 1, wherein the movable cylinder section is sleeved outside the lower end of the upper section inner cylinder, and a gap between the movable cylinder section and the upper section inner cylinder section is 2-3 mm.
3. The steel inner cylinder chimney with the flange-free flexible sealing connection as claimed in claim 2, wherein a gas blocking cover is arranged at the middle position of the outer side of the upper section inner cylinder.
4. The steel inner cylinder chimney with the flange-free flexible sealing connection as claimed in claim 3, wherein the gas blocking cover is divided into two half structures, and the two half structures are respectively welded with the side wall of the upper section inner cylinder.
5. The steel inner cylinder chimney with no flange flexible sealing connection of claim 3, characterized in that a flexible sealing material is filled between the gas shield and the outer side wall of the upper section inner cylinder.
6. The steel inner cylinder chimney with the flange-free flexible sealing connection as claimed in claim 1, wherein an air blocking ring is welded on the inner side of the middle part of the straight section of the movable cylinder section.
7. The steel inner cylinder chimney without the flange and with the flexible sealing connection as claimed in claim 6, wherein the sealing ring is welded on the outer side of the middle part of the straight section of the movable cylinder section, and after the upper section inner cylinder and the lower section inner cylinder are installed, the inverted cone-shaped cylinder at the top end of the lower section inner cylinder is abutted against the lower end face of the sealing ring.
8. The steel inner cylinder chimney with the flange-free flexible sealing connection as claimed in claim 1, wherein the spring assemblies comprise 3-4 groups and are uniformly distributed along the circumferential direction of the upper section inner cylinder.
9. The steel inner barrel chimney according to claim 1, wherein the movable barrel section conical section is integrally formed at the lower end of the movable barrel section straight section.
10. The steel inner cylinder chimney with no flange flexible sealing connection as claimed in claim 1, wherein the upper section outer cylinder and the lower section outer cylinder are connected through a flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011048840.7A CN112032750A (en) | 2020-09-29 | 2020-09-29 | Steel inner cylinder chimney in flange-free flexible sealing connection |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011048840.7A CN112032750A (en) | 2020-09-29 | 2020-09-29 | Steel inner cylinder chimney in flange-free flexible sealing connection |
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| CN112032750A true CN112032750A (en) | 2020-12-04 |
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| CN202011048840.7A Pending CN112032750A (en) | 2020-09-29 | 2020-09-29 | Steel inner cylinder chimney in flange-free flexible sealing connection |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112935706A (en) * | 2021-02-14 | 2021-06-11 | 何苗 | Prefabricated steel chimney shell ring coupling mechanism |
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2020
- 2020-09-29 CN CN202011048840.7A patent/CN112032750A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112935706A (en) * | 2021-02-14 | 2021-06-11 | 何苗 | Prefabricated steel chimney shell ring coupling mechanism |
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