CN110103174B - Special tool for disassembling and assembling local leaking stoppage gasket of boiler tubular air preheater - Google Patents
Special tool for disassembling and assembling local leaking stoppage gasket of boiler tubular air preheater Download PDFInfo
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- CN110103174B CN110103174B CN201910501695.4A CN201910501695A CN110103174B CN 110103174 B CN110103174 B CN 110103174B CN 201910501695 A CN201910501695 A CN 201910501695A CN 110103174 B CN110103174 B CN 110103174B
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- air preheater
- handle
- transmission rope
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
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Abstract
The invention provides a special tool for disassembling and assembling a local leaking stoppage gasket of a boiler tubular air preheater, which comprises: the handle, the transmission rope, the guide cylinder and the pincer-shaped clamp are connected in sequence; one end of the transmission rope is connected to the handle, the other end of the transmission rope penetrates through the guide cylinder and is connected with the pincerlike clamp, the maximum diameters of the guide cylinder and the pincerlike clamp are both smaller than the inner diameter of the air preheater tube, and the pincerlike clamp is matched with the concave part of the spring steel band; the handle is connected with the clamp-shaped fixture in a controlled manner through the transmission rope to clamp or open. The invention can be used for dismounting the leakage stoppage gasket of the whole section of the air preheater tube, so that only the gasket is additionally arranged or replaced during each maintenance without replacing the whole tube, thereby greatly prolonging the service life of the preheater tube, improving the maintenance efficiency and reducing the maintenance cost.
Description
Technical Field
The invention relates to the technical field of leakage stoppage of air preheaters, in particular to a special tool for disassembling and assembling a local leakage stoppage gasket of a tubular air preheater of a boiler.
Background
The air preheater is a heat exchanger for preparing fresh air participating in boiler combustion and hot waste flue gas exhausted after boiler combustion, and uses the heat of the flue gas exhausted by the boiler to preheat the air fed into the boiler for combustion-supporting, so that the fuel is easy to catch fire and the combustion is stable. Meanwhile, the heat loss of the exhaust smoke is reduced, the heat is recycled, and the energy-saving device is one of the most important energy-saving devices.
The air leakage rate of the air preheater is one of important indexes for measuring the efficiency of the boiler, and the excessively high air leakage rate means that excessive hot air is discharged along with flue gas without entering a hearth to participate in combustion, so that the heat loss is large. Meanwhile, the flue gas flow of the induced draft fan is increased, the invalid output of the induced draft fan is increased, and the plant power consumption rate is increased. The air leakage rate is generally controlled within 3%, when the air leakage rate of the air preheater reaches 15%, the output of an induced draft fan is insufficient, the load capacity of a boiler is influenced, and the power generation capacity of the whole set of unit is reduced. Therefore, the air leakage treatment of the boiler air preheater is directly related to the heat efficiency of the boiler, the power generation capacity of the whole set of unit and the energy consumption level of a power plant.
Because the designed and used air preheater pipe has poor wear resistance and large replacement amount, in order to reduce the maintenance cost and ensure the stable operation of a unit and change the conventional maintenance process for replacing the whole pipeline, a leakage stoppage lining coated with a dilute phase wear-resistant material is developed as shown in figures 2 and 3, and how to realize the disassembly and assembly of the leakage stoppage lining from pipe boxes on two sides is a technical problem to be solved in the field.
Disclosure of Invention
The invention aims to provide a special tool for quickly disassembling and assembling a leakage stoppage lining, which can quickly and effectively realize the disassembly and assembly of the leakage stoppage lining on a worn leakage part of a whole pipe section of an air preheater pipe so as to achieve the purposes of reducing the maintenance cost and eliminating the air leakage of the air preheater.
The invention provides a special tool for dismounting a local leaking stoppage gasket of a boiler tube type air preheater, which is used for mounting the leaking stoppage gasket consisting of a gasket substrate, a spring steel strip and a wear-resistant coating into an air preheater tube, wherein the gasket substrate is of an arc surface structure, the spring steel strip is an omega-shaped cartridge clip with recesses at two sides, and the gasket substrate is welded on the upper surface of the spring steel strip; the local leaking stoppage facing structure composed of the facing substrate and the spring steel strip is assembled in an air preheater pipe with a circular radial section, the radius of the arc surface of the facing substrate and the radius of curvature of the spring steel strip are matched with the radius of the air preheater pipe, and the wear-resistant coating is coated on the surface of the facing substrate, and the local leaking stoppage facing structure is characterized by comprising: the handle, the transmission rope, the guide cylinder and the pincer-shaped clamp are connected in sequence; one end of the transmission rope is connected to the handle, the other end of the transmission rope penetrates through the guide cylinder and is connected with the pincerlike clamp, the maximum diameters of the guide cylinder and the pincerlike clamp are both smaller than the inner diameter of the air preheater tube, and the pincerlike clamp is matched with the concave part of the spring steel band; the handle is connected with the clamp-shaped fixture in a controlled manner through the transmission rope to clamp or open.
The invention can be used for dismounting the leakage stoppage gasket of the whole section of the air preheater tube, so that only the gasket is additionally arranged or replaced during each maintenance without replacing the whole tube, thereby greatly prolonging the service life of the preheater tube, improving the maintenance efficiency and reducing the maintenance cost.
Further, the handle includes trigger and spacing card, the trigger with the driving rope links to each other, spacing card is connected on the handle of trigger rear side, spacing card with the trigger cooperatees, including the chucking or loosen two operating position.
Furthermore, the outer side of the transmission rope in the middle of the handle and the guide cylinder is wrapped with a rope sleeve.
Furthermore, the outside of guide cylinder is connected with the slip position circle, the diameter of slip position circle with the internal diameter phase-match of air preheater pipe.
Furthermore, the pincerlike clamp comprises a clamp and a spring, the clamp consists of two clamping pieces which are in X-shaped cross connection, the clamping pieces can rotate around a connecting point, and the rear ends of the clamping pieces are connected with the transmission rope; the spring is connected between the two clamping pieces in a normal compression state at the front parts of the clamping pieces, and the front ends of the clamping pieces are provided with clamping grooves matched with the concave parts of the spring steel belts.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
FIG. 1 is a structural diagram of a special tool for disassembling and assembling a local leakage stoppage lining of a boiler tube type air preheater according to an embodiment of the invention;
FIG. 2 is a general block diagram of a lost circulation patch to be installed;
fig. 3 is a partial structural view of a portion a in fig. 2.
Reference numerals:
1 handle
11 trigger
12 position limiting card
2 drive rope
21 rope sling
3 guide cylinder
31 sliding locating ring
4 pincer-shaped fixture
41 card clip
42 spring
5 air preheater pipe
6-lining substrate
7 spring steel band
8 wear-resistant coating
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
The invention provides a special tool for dismounting a local leaking stoppage gasket of a boiler tube type air preheater, which is used for mounting the leaking stoppage gasket which is composed of a gasket substrate 6, a spring steel strip 7 and a wear-resistant coating 8 and is shown in figures 2 and 3 into an air preheater tube 5, wherein the gasket substrate 6 is of an arc surface structure, the spring steel strip 7 is an omega-shaped cartridge clip with recesses at two sides, and the gasket substrate 6 is welded on the upper surface of the spring steel strip 7; the local leakage stoppage lining structure composed of the lining substrate 6 and the spring steel strip 7 is assembled in an air preheater pipe with a circular radial section, the radius of the circular arc surface of the lining substrate 6 and the radius of curvature of the spring steel strip 7 are matched with the radius of the air preheater pipe, and the wear-resistant coating 8 is coated on the surface of the lining substrate 6. Specifically, as shown in fig. 1, the method includes: the handle 1, the transmission rope 2, the guide cylinder 3 and the pincer-shaped clamp 4 are connected in sequence; one end of the transmission rope 2 is connected to the handle 1, the other end of the transmission rope penetrates through the guide cylinder 3 and is connected with the pincerlike clamp 4, the maximum diameters of the guide cylinder 3 and the pincerlike clamp 4 are both smaller than the inner diameter of the air preheater tube 5, and the pincerlike clamp 4 is matched with the concave part of the spring steel strip 7; the handle 1 is connected with the clamp-shaped fixture 4 through the transmission rope 2 to control the clamping or the opening of the clamp-shaped fixture. The invention can be used for dismounting the leakage stoppage gasket of the whole section of the air preheater tube, so that only the gasket is additionally arranged or replaced during each maintenance without replacing the whole tube, thereby greatly prolonging the service life of the preheater tube, improving the maintenance efficiency and reducing the maintenance cost.
In one embodiment of the present invention, the handle 1 comprises a trigger 11 and a limit clip 12, the trigger 11 is connected to the transmission rope 2, the limit clip 12 is connected to the handle 1 at the rear side of the trigger 11, and the limit clip 12 is matched with the trigger 11 and comprises two working positions of clamping or releasing. The design of the handle is similar to that of a hand brake of a bicycle, one end of the transmission rope is fixedly connected to the handle through threads by an outer sleeve, and the length and the tightness can be adjusted. The transmission rope is connected with the trigger through the cylinder at the front end of the handle, and the handle is provided with a limiting clamp for limiting the clamping or loosening of the trigger.
In one embodiment of the present invention, the outer side of the driving rope 2 in the middle of the handle 1 and the guide cylinder 3 is wrapped with a rope sleeve 21, which serves to reinforce and protect the driving rope. The transmission rope should possess certain rigidity, can hand and send guide cylinder and pincers type fixture into in the air preheater pipe, and can easily remove and rotate, adjust the position of sending into intraductal leaking stoppage facing. At the same time, the transmission rope should also have a certain bending capability so that it can send the components into the pipe from the narrow space of the pipe box. For this, we chose a cable transmission assembly with a wire rope transmission in a flat steel band of phi 10mm wound in a flexible sleeve, similar to the brake cable structure of a bicycle.
In one embodiment of the present invention, a sliding positioning ring 31 is connected to the outside of the guide cylinder 3, and the diameter of the sliding positioning ring 31 matches with the inner diameter of the air preheater tube 5. In a specific embodiment, the guide cylinder is divided into two parts, one part is an inner cylinder, the guide cylinder is made of a steel pipe with the diameter of 25mm, the length of the guide cylinder is 220mm, and one end of the guide cylinder is slotted and flattened to be in pin connection with the clamp-type fixture. The other end of the inner cylinder is welded with a limiting plug, the limiting plug is fixed with an outer sleeve connected with the transmission rope through threads and is adjustable, and the transmission rope penetrates through the inner cylinder. The other part is a sliding positioning ring which is made of two 10mm wide circular rings, and the two rings are respectively welded at the two ends of the inner cylinder by connecting sheets, have the distance of 200mm and are concentric with the inner cylinder. The guide cylinder has the following functions: a. fixing the clamp-type fixture; b. the transmission rope penetrates through the transmission rope; c. the fixture is kept to move concentrically with the air preheater tube all the time during operation.
In one embodiment of the invention, the pincer-shaped clamp 4 comprises a clamp 41 and a spring 42, wherein the clamp 41 consists of two jaws which are in X-shaped cross connection, the jaws can rotate around a connection point, and the rear ends of the jaws are connected with the transmission rope 2; at the front part of the clamping pieces, the spring 42 is connected between the two clamping pieces in a normal compression state, and the front ends of the clamping pieces are provided with clamping grooves matched with the concave parts of the spring steel belt 7. The clamp-type fixture has the function of stably and easily clamping the plugging gasket, so that the plugging gasket does not fall off or skew when moving in the air preheater tube. In the embodiment of the invention, the head of the clamp of the pincer-shaped clamp is designed into a groove with the width of 10.5mm and the height of 10mm, and the head is just clamped in the grooves of the spring steel bands at the two sides of the plugging lining, so that the head does not shake back and forth and left and right. The width of the clamp body of the clamp-shaped clamp is less than 53mm of the inner diameter of the air preheater tube, and the clamp body is designed to be 50mm through tests. The length of each force arm and the selection of the supporting spring can reach the length and the elasticity which can be easily clamped and loosened through tests.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (4)
1. The tool is characterized by being used for installing a leakage stoppage lining consisting of a lining substrate, a spring steel strip and a wear-resistant coating into an air preheater tube, wherein the lining substrate is of an arc surface structure, the spring steel strip is an omega-shaped cartridge clip with recesses at two sides, and the lining substrate is welded on the upper surface of the spring steel strip; the local leakage stoppage lining structure composed of the lining substrate and the spring steel strip is assembled in an air preheater pipe with a circular radial section, the radius of the arc surface of the lining substrate and the radius of curvature of the spring steel strip are matched with the radius of the air preheater pipe, and the wear-resistant coating is coated on the surface of the lining substrate and comprises:
the handle, the transmission rope, the guide cylinder and the pincer-shaped clamp are connected in sequence;
one end of the transmission rope is connected to the handle, the other end of the transmission rope penetrates through the guide cylinder and is connected with the pincerlike clamp, the maximum diameters of the guide cylinder and the pincerlike clamp are both smaller than the inner diameter of the air preheater tube, and the pincerlike clamp is matched with the concave part of the spring steel band;
the handle is connected with the clamp-shaped fixture through the transmission rope in a controlled manner to clamp or open; the transmission rope has rigidity and bending capacity;
the clamp comprises a clamp and a spring, the clamp consists of two clamping pieces which are in X-shaped cross connection, the clamping pieces can rotate around a connecting point, and the rear ends of the clamping pieces are connected with the transmission rope; the spring is connected between the two clamping pieces in a normal compression state at the front parts of the clamping pieces, and the front ends of the clamping pieces are provided with clamping grooves matched with the concave parts of the spring steel belts.
2. The tool special for disassembling and assembling the local leakage stoppage linings of the tubular air preheater of the boiler as claimed in claim 1, wherein the handle comprises a trigger and a limit clip, the trigger is connected with the driving rope, the limit clip is connected to the handle at the rear side of the trigger, and the limit clip is matched with the trigger and comprises two working positions of clamping or releasing.
3. The tool special for disassembling and assembling the partial leakage stoppage lining of the tubular air preheater of the boiler as claimed in claim 1, wherein the outside of the driving rope in the middle part of the handle and the guide cylinder is wrapped with a rope sleeve.
4. The special tool for disassembling and assembling the partial leakage stoppage lining of the boiler tube type air preheater as claimed in claim 1, wherein a sliding positioning ring is connected to the outer side of the guide cylinder, and the diameter of the sliding positioning ring is matched with the inner diameter of the air preheater tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910501695.4A CN110103174B (en) | 2019-06-11 | 2019-06-11 | Special tool for disassembling and assembling local leaking stoppage gasket of boiler tubular air preheater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910501695.4A CN110103174B (en) | 2019-06-11 | 2019-06-11 | Special tool for disassembling and assembling local leaking stoppage gasket of boiler tubular air preheater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110103174A CN110103174A (en) | 2019-08-09 |
| CN110103174B true CN110103174B (en) | 2021-07-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910501695.4A Active CN110103174B (en) | 2019-06-11 | 2019-06-11 | Special tool for disassembling and assembling local leaking stoppage gasket of boiler tubular air preheater |
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| CN (1) | CN110103174B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114043430A (en) * | 2021-12-03 | 2022-02-15 | 中国原子能科学研究院 | Device for operating a hold-down assembly |
Citations (6)
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|---|---|---|---|---|
| EP0549578B1 (en) * | 1989-11-18 | 1994-09-21 | Eryagci, Ismail | Braiding pincers |
| CN101926696A (en) * | 2010-08-30 | 2010-12-29 | 尹秋伟 | Esophageal stent forceps |
| CN103899879A (en) * | 2014-04-16 | 2014-07-02 | 浙江众立建设集团有限公司 | Pipeline connector repair device and method |
| CN205394513U (en) * | 2016-03-18 | 2016-07-27 | 北京霍慕佳门窗建材销售有限公司 | Press from both sides instrument pincers of getting narrow space article |
| CN207087671U (en) * | 2017-06-22 | 2018-03-13 | 广西电网有限责任公司贵港供电局 | A kind of New insulated clamp |
| CN207784116U (en) * | 2017-12-25 | 2018-08-31 | 天津市海尔斯金属制品有限公司 | A kind of small-sized mammalian capture pincers |
-
2019
- 2019-06-11 CN CN201910501695.4A patent/CN110103174B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0549578B1 (en) * | 1989-11-18 | 1994-09-21 | Eryagci, Ismail | Braiding pincers |
| CN101926696A (en) * | 2010-08-30 | 2010-12-29 | 尹秋伟 | Esophageal stent forceps |
| CN103899879A (en) * | 2014-04-16 | 2014-07-02 | 浙江众立建设集团有限公司 | Pipeline connector repair device and method |
| CN205394513U (en) * | 2016-03-18 | 2016-07-27 | 北京霍慕佳门窗建材销售有限公司 | Press from both sides instrument pincers of getting narrow space article |
| CN207087671U (en) * | 2017-06-22 | 2018-03-13 | 广西电网有限责任公司贵港供电局 | A kind of New insulated clamp |
| CN207784116U (en) * | 2017-12-25 | 2018-08-31 | 天津市海尔斯金属制品有限公司 | A kind of small-sized mammalian capture pincers |
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| Publication number | Publication date |
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| CN110103174A (en) | 2019-08-09 |
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