CN212886825U - Special tool for high-pressure welding and polishing pipe bundle sealing - Google Patents
Special tool for high-pressure welding and polishing pipe bundle sealing Download PDFInfo
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- CN212886825U CN212886825U CN202021009944.2U CN202021009944U CN212886825U CN 212886825 U CN212886825 U CN 212886825U CN 202021009944 U CN202021009944 U CN 202021009944U CN 212886825 U CN212886825 U CN 212886825U
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- tube bundle
- head seat
- positioning rod
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Abstract
The utility model discloses a height adds sealing weld specialized tool that polishes of tube bank, including the bistrique seat, fix the installation end at bistrique seat rear end center, fix the locating lever at bistrique seat front end center to and fixed mounting is at the profile of tooth bistrique that the locating lever outside was located to the bistrique seat front end. The utility model is arranged on the pneumatic polishing machine, and the tool can effectively prevent the damage to nearby tube bundles in the polishing process due to accurate positioning, can shorten the polishing time of a single tube bundle welded junction to within 20 minutes, greatly shortens the polishing time, and has very obvious safety and high efficiency; by using the tool, the destructiveness of nearby tube bundles is obviously reduced in the sealing welding and polishing process of the high-pressure tube bundles, the working efficiency is improved, and the labor intensity is reduced.
Description
Technical Field
The utility model relates to a high pressure feed water heater heat exchanger tube bank grinding tool of thermal power plant, concretely relates to height adds tube bank seal welding specialized tool that polishes.
Background
The high-pressure heater in thermodynamic system of steam turbine set utilizes the steam which has been used in turbine to heat water supply so as to reduce heat loss of discharged steam in condenser and raise circulation heat efficiency. Whether the high-pressure heater can be normally put into operation or not has great influence on the economy and the output of the steam turbine set. As the three-level high-pressure compressors of the unit do not have small bypasses, once leakage occurs, only 3 high-pressure compressors can be disconnected at the same time, so that the load and the heat economy of the unit are not only influenced, but also the safety of the unit is influenced. When the high-pressure heater is shut down, the heat economy is greatly affected. In general, after the accident of a high-pressure heater of a 300MW subcritical pressure intermediate single reheating unit is disconnected, the standard coal consumption is increased by 14 g/(kW.h), the heat consumption is increased by 4.6%, and the output is limited by 10-20%. Therefore, the safe and stable operation of the heater directly influences the safe economy of the unit and the economic benefit of the power plant. Therefore, after high pressure leakage in operation, rush repair is carried out in time, and shortening the rush repair time as much as possible is vital to improving the economy and the safety of the unit.
After a tube bundle leaks, the nearby tube bundle is very damaged by direct impact, water erosion or abrasion in a short time. The carbon steel tube is typically thinned to the point where it will break. The non-blocking of nearby pipes or the insufficient number of blocked pipes can cause recurrent failures, increase the number of pipes to be repaired and enlarge the range. Experience has shown that to prevent recurrent failures and premature leak-off damage of the pipes, all the pipes around the leaking pipe and the pipes of the second layer of outer rings, as well as the pipes directly opposite the leaking channel, must be plugged immediately, otherwise the protection is reduced. Generally, one pipe bundle leaks, and in addition, 5 to 10 pipe bundles need to be blocked by the pipe bundles on the periphery, 10 to 20 pipe blocking weld joints need to be polished.
In the whole pipe plugging process, the sealing welding between the pipe bundle and the pipe plate is polished, and the polishing of the root pipe bundle welded junction generally requires 45 minutes and occupies more than 2/3 of the whole pipe plugging time. Therefore, it is critical to shorten the first-aid repair time, improve the labor efficiency, reduce the labor intensity of the working personnel and reduce the polishing time.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a height adds sealing weld specialized tool that polishes of tube bank is provided, in the stifled pipe course of operation of high pressure heater tube bank, reduces the sealing weld time of polishing between tube bank and the tube sheet to effectively protect the tube bank, improve work efficiency.
In order to solve the above problems, the utility model adopts the following technical proposal:
the special tool for polishing the high-pressure pipe bundle seal welding comprises a grinding head seat, a mounting end fixed at the center of the rear end of the grinding head seat, a positioning rod fixed at the center of the front end of the grinding head seat and a tooth-shaped grinding head fixedly installed at the front end of the grinding head seat and positioned outside the positioning rod.
As a further improvement of the utility model, the front end of the grinding head seat is provided with a grinding head seat mounting hole, and the tooth-shaped grinding head is provided with a tooth-shaped grinding head mounting hole matched with the grinding head seat mounting hole;
the tooth-shaped grinding head is fixedly connected to the front end of the grinding head seat by a fastening bolt penetrating through the tooth-shaped grinding head mounting hole and the grinding head seat mounting hole.
As a further improvement of the utility model, a fixed sleeve is fixedly sleeved outside the positioning rod, a pin hole is arranged at the side part of the fixed sleeve, and a pin groove corresponding to the pin hole is arranged outside the positioning rod;
the front end of the fixed pin penetrates through the pin hole and then is tightly propped in the pin groove, and the fixed sleeve is fastened outside the positioning rod.
As a further improvement of the utility model, the external diameter of the tooth-shaped grinding head covers the whole width of the meat welded by the heat exchange tube bundle seal welding, and the external diameter of the tooth-shaped grinding head is greater than the width of the meat welded by the heat exchange tube bundle seal welding by 0.2-0.3 mm.
As a further improvement of the utility model, the fixed sleeve is in clearance fit with the heat exchange tube bundle, and the fit clearance is 0.3-0.4 mm.
As a further improvement of the utility model, the length of the fixed sleeve is 1-3mm greater than that of the heat exchange tube bundle.
Adopt the produced beneficial effect of above-mentioned technical scheme to lie in:
the utility model discloses install on pneumatic buffing machine, lock the bistrique after the installation is firm, insert the locating lever of this instrument in the tube bank that needs to polish, both hands are tightly held the buffing machine, the inspection is confirmed the profile of tooth bistrique and is contacted with the welding flesh completely, drive pneumatic means and polish, change after the sawtooth height reduces 1/4, this instrument because the location is accurate, can effectively prevent the destruction effect to near tube bank in the polishing process, can make the polishing time of single tube bank weld crater shorten to within 20 minutes, the polishing time has been shortened greatly, security and high efficiency are very obvious; by using the tool, the destructiveness of nearby tube bundles is obviously reduced in the sealing welding and polishing process of the high-pressure tube bundles, the working efficiency is improved, and the labor intensity is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required 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 side view of the present invention;
fig. 2 is a schematic top view of the present invention;
fig. 3 is a schematic view of the mounting hole structure of the head base of the present invention;
FIG. 4 is a schematic view of the assembly of the fixing sleeve on the positioning rod of the present invention;
figure 5 is a schematic view of the present invention installed on a pneumatic grinder.
Wherein:
1 mounting end, 2 grinding head seats, 3 tooth-shaped grinding heads, 4 positioning rods, 5 tooth-shaped grinding head mounting holes, 6 grinding head seat mounting holes, 7 fastening bolts, 8 fixing pins and 9 fixing sleeves.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the application, its application, or uses. 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 application.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting.
Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In the description of the present application, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the case of not making a reverse description, these directional terms do not indicate and imply that the device or element being referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore, should not be considered as limiting the scope of the present application; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
Example one
As shown in figures 1, 2 and 3,
the utility model provides a height adds sealing weld specialized tool that polishes of tube bank, includes headstock 2, fixes at the installation end 1 at headstock 2 rear end center, fixes at 2 front end center's of headstock locating lever 4 to and fixed mounting is at 2 front ends of headstock and lie in the profile of tooth bistrique 3 in the locating lever 4 outside. Specifically, the mounting end 1, the grinding head seat 2, the tooth-shaped grinding head 3 and the positioning rod 4 are all made of 35CrMoa materials.
Further, a grinding head seat mounting hole 6 is formed in the front end of the grinding head seat 2, and a tooth-shaped grinding head mounting hole 5 matched with the grinding head seat mounting hole 6 is formed in the tooth-shaped grinding head 3;
the tooth-shaped grinding head 3 is fixedly connected to the front end of the grinding head seat 2 by a fastening bolt 7 penetrating through the tooth-shaped grinding head mounting hole 5 and the grinding head seat mounting hole 6.
As shown in fig. 5, the tool is installed on a common pneumatic polishing machine, which is a conventional device commonly used by those skilled in the art, and the structure is not described again, the size requirement is not critical, the length of the installation end 1 is generally equivalent to the size of a common grinding head, about 25-40mm, and the outer diameter value a can be 8-10 mm;
the outer diameter of the tooth-shaped grinding head 3 is determined according to the outer diameter of the welding meat for the sealing welding of the heat exchange tube bundle, the outer diameter is 0.2-0.3mm larger than the outer diameter of the welding meat, the thickness of the saw teeth reaches 4mm, the strength of the grinding head and the requirements of the sealing welding of the tube bundle can be guaranteed, the grinding head is not too thick or too thin, the excessive thickness can damage welding ports of end plates of the tube bundle or other tube bundles around the end plates of the tube bundle, the excessive thickness reduces the strength, and.
The height of the saw teeth of the tooth-shaped grinding head 3 is 5mm, the tooth pitch is 4-5mm, the angle is 45 degrees, and the wear resistance and the rigidity of the saw teeth are improved by nitriding.
The outer diameter of the positioning rod 4 is determined according to the inner diameter of the heat exchange tube bundle and the inner diameter of the seal welding, the fit clearance between the positioning rod 4 and the heat exchange tube bundle is 0.3-0.4mm, the length of the positioning rod 4 is 15mm, the positioning rod 4 has an effective positioning function and a positioning adjustment function, and the polishing work is simple, convenient, accurate and effective.
The tool is arranged on a pneumatic polishing machine, a grinding head is locked after the tool is firmly arranged, a positioning rod of the tool is inserted into a tube bundle to be polished, the polishing machine is tightly held by two hands, the tooth-shaped grinding head is checked and confirmed to be in complete contact with welding meat, a pneumatic device is driven to polish, and the tool is replaced after the height of a sawtooth is reduced to 1/4; the destructiveness of nearby tube bundles in the sealing welding and polishing process of the high-pressure tube bundles can be obviously reduced, the working efficiency is improved, and the labor intensity is reduced.
Example two
As shown in fig. 4, in the first embodiment, a fixing sleeve 9 is fixedly sleeved on the outer side of the positioning rod 4, a pin hole is formed in the side of the fixing sleeve 9, and a pin slot corresponding to the pin hole is formed in the outer side of the positioning rod 4;
the front end of the fixing pin 8 penetrates through the pin hole and then is tightly propped in the pin groove, and the fixing sleeve 9 is fastened on the outer side of the positioning rod 4.
On the basis of the technical effect of the first embodiment, the fixing sleeves 9 with different thicknesses can be additionally arranged according to the inner diameters of different heat exchange tube bundles, and the fixing sleeves 9 are in clearance fit with the heat exchange tube bundles, wherein the fit clearance is 0.3-0.4 mm; the fixing sleeve 9 with different thickness is only replaced, and the device can be suitable for positioning and using various heat exchange tube bundle inner diameter sizes.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; it is obvious to those skilled in the art that a plurality of embodiments of the present invention may be combined. Such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present invention.
Claims (6)
1. The utility model provides a height adds sealing weld specialized tool that polishes of tube bank which characterized in that: the grinding head comprises a grinding head seat (2), a mounting end (1) fixed at the center of the rear end of the grinding head seat (2), a positioning rod (4) fixed at the center of the front end of the grinding head seat (2), and a tooth-shaped grinding head (3) fixedly mounted at the front end of the grinding head seat (2) and positioned outside the positioning rod (4).
2. The special tool for high pressure welding and grinding of the tube bundle according to claim 1, wherein: a grinding head seat mounting hole (6) is formed in the front end of the grinding head seat (2), and a tooth-shaped grinding head mounting hole (5) matched with the grinding head seat mounting hole (6) is formed in the tooth-shaped grinding head (3);
the tooth-shaped grinding head (3) is fixedly connected to the front end of the grinding head seat (2) by a fastening bolt (7) penetrating through the tooth-shaped grinding head mounting hole (5) and the grinding head seat mounting hole (6).
3. The special tool for high pressure welding and grinding of the tube bundle according to claim 2, wherein: a fixed sleeve (9) is fixedly sleeved on the outer side of the positioning rod (4), a pin hole is formed in the side part of the fixed sleeve (9), and a pin groove corresponding to the pin hole is formed in the outer side of the positioning rod (4);
the front end of the fixed pin (8) penetrates through the pin hole and then is tightly propped in the pin groove, and the fixed sleeve (9) is fastened on the outer side of the positioning rod (4).
4. The special tool for high pressure welding and grinding of the tube bundle according to claim 3, wherein: the outer diameter of the tooth-shaped grinding head (3) covers the width of the whole heat exchange tube bundle seal welding meat, and the outer diameter of the tooth-shaped grinding head (3) is 0.2-0.3mm larger than the width of the heat exchange tube bundle seal welding meat.
5. The special tool for high pressure welding and grinding of the tube bundle according to claim 4, wherein: the fixed sleeve (9) is in clearance fit with the heat exchange tube bundle, and the fit clearance is 0.3-0.4 mm.
6. The special tool for high pressure welding and grinding of the tube bundle according to claim 5, wherein: the length of the fixing sleeve (9) is 1-3mm greater than that of the heat exchange tube bundle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021009944.2U CN212886825U (en) | 2020-06-05 | 2020-06-05 | Special tool for high-pressure welding and polishing pipe bundle sealing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021009944.2U CN212886825U (en) | 2020-06-05 | 2020-06-05 | Special tool for high-pressure welding and polishing pipe bundle sealing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212886825U true CN212886825U (en) | 2021-04-06 |
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ID=75276186
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021009944.2U Active CN212886825U (en) | 2020-06-05 | 2020-06-05 | Special tool for high-pressure welding and polishing pipe bundle sealing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212886825U (en) |
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2020
- 2020-06-05 CN CN202021009944.2U patent/CN212886825U/en active Active
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