CN214947006U - Novel wear-resistant short pipe - Google Patents
Novel wear-resistant short pipe Download PDFInfo
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- CN214947006U CN214947006U CN202120434518.1U CN202120434518U CN214947006U CN 214947006 U CN214947006 U CN 214947006U CN 202120434518 U CN202120434518 U CN 202120434518U CN 214947006 U CN214947006 U CN 214947006U
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- metal casing
- inner tube
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- ceramic inner
- wall
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Abstract
The utility model relates to a novel wear-resisting nozzle stub, including ceramic inner tube, metal casing and two ring baffle, ceramic inner tube suit is inside the metal casing, and has the expansion gap between the outer wall of ceramic inner tube and the metal casing's inner wall, ring baffle comprises integrated into one piece's annular main part and welding fixed part, and welding fixed part and annular main part mutually perpendicular set up, and two ring baffle cover respectively in metal casing's upper and lower opening and further through the welding fixed part that corresponds and metal casing outer wall welding in order to realize that ring baffle and metal casing's are fixed. Borrow by above-mentioned technical scheme, the utility model discloses a be novel annular baffle lid of end cover form locate metal sleeve under/behind the terminal surface direct weld fixation on the metal sleeve outer wall to avoid welding solution to contact ceramic inner tube and formation to weld the tumour, make wear-resisting nozzle stub wholeness good, the difficult cracked steady operation cycle of greatly prolonging equipment of ceramic inner tube.
Description
Technical Field
The utility model belongs to the technical field of petrochemical industry equipment, in particular to novel wear-resisting nozzle stub.
Background
The catalytic cracking technology of heavy oil is a widely adopted technology in the petrochemical oil refining industry. By the technology, a large amount of heavy residual oil (accounting for more than 60 percent of the raw material) generated in one processing process of petroleum refining can be converted into light oil components such as gasoline, diesel oil and petrochemical gas which are greatly required in national economy. The catalytic cracking technology of heavy oil is an important secondary processing means in the oil refining industry.
In the regenerator stage of catalytic cracking, the catalyst is subjected to regeneration treatment because the activity of the catalyst is reduced due to the fact that oil coke is attached to the surface in the reaction process, the catalyst from the reactor is heated and ascended under the action of high-temperature large-flow main air, and meanwhile, fuel oil is sprayed through fuel oil nozzles distributed on the wall of the reactor to adjust the reaction temperature, so that the oil coke attached to the surface of the catalyst is burnt and decomposed into flue gas at high temperature, and the flue gas enters a gas collection chamber and is discharged into a flue after being converged. The pressure reducing pore plate is important equipment on the flue, plays a role in balancing the pressure of the regenerator, reducing the pressure drop, abrasion and noise of the double-acting slide valve, has larger pressure drop of the flue gas from the regenerator to the inlet of the waste heat boiler, is arranged for reducing the corrosion of the double-acting slide valve and shares a part of the pressure drop of the flue gas, and is internally provided with 3-6 porous plates generally. The support plate adopts an elliptical seal head structure, and dozens to dozens of wear-resistant short pipes are required to be installed on each pressure reduction pore plate for pressure reduction.
The traditional wear-resistant short pipe is shown in figure 1 and comprises a non-metal ceramic inner pipe 10, a metal sleeve 20 and an annular baffle 30, wherein the non-metal ceramic inner pipe is mainly composed of alumina, the metal sleeve is sleeved outside the ceramic inner pipe, the two ends of the annular baffle are fixed in a welding mode, and then the annular baffle is integrally welded on a seal head structure of a decompression orifice plate. The ceramic inner pipe has excellent wear resistance, but is limited by physical characteristics, even if an expansion gap (see a gap d1 and a gap d2 in the figure) of 1.5 mm-2 mm is formed between the sleeve and the inner pipe, the temperature of a generated welding solution is about 2300 ℃ when the annular baffle is welded, and the welding solution easily flows into the expansion gap, so that the inner pipe is heated and brittle, and the replacement is very inconvenient. Meanwhile, welding solution forms welding beading after cooling the inner wall of the metal sleeve, the working temperature of the pressure reduction pore plate is generally over 600 ℃, the heating generated by temperature rise and temperature reduction is uneven, the extrusion caused by different expansion coefficients and the like, the vibration of the equipment and the like can break the ceramic inner tube, the wear-resistant short tube loses effect, and the integral operation of the equipment is influenced.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model provides a novel wear-resisting short pipe, which solves the technical problem that the inner pipe is easy to crack and break.
The purpose of the utility model and the technical problem thereof are realized by adopting the following technical scheme. The foundation the utility model provides a novel wear-resisting nozzle stub, including ceramic inner tube, metal casing and two ring baffle, ceramic inner tube suit is inside metal casing, and has the expansion gap between the outer wall of ceramic inner tube and the metal casing's inner wall, ring baffle comprises integrated into one piece's annular main part and welding fixed part, and welding fixed part and annular main part mutually perpendicular set up, and two ring baffle cover respectively in metal casing's upper and lower opening and further through the welding fixed part that corresponds and metal casing outer wall welding in order to realize that ring baffle and metal casing are fixed.
Preferably, the opening diameter of the annular baffle is equal to the inner diameter of the ceramic inner pipe.
Preferably, the annular baffle has a gap between the inner end face thereof and the ceramic inner tube after being welded and fixed.
Preferably, the inner diameter of the welding fixing part is equal to the outer diameter of the metal sleeve.
Borrow by above-mentioned technical scheme, the utility model discloses carry out institutional advancement with the ring baffle on the wear-resisting nozzle stub, make ring baffle be the end cover form on the whole through addding the welding fixed part to can cover and locate on the metal sleeve/behind the terminal surface direct welded fastening on the metal sleeve outer wall, avoid welding solution to contact ceramic inner tube and formation weld beading, through improving, the utility model discloses a wear-resisting nozzle stub wholeness is good, and the ceramic inner tube is difficult cracked, greatly prolongs the smooth operation cycle of equipment.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented according to the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more obvious and understandable, the following preferred embodiments are described in detail with reference to the accompanying drawings.
Drawings
Fig. 1 is a schematic structural view of a conventional wear-resistant pipe spool.
Fig. 2 is a schematic sectional structure diagram of the present invention.
Fig. 3 is a schematic view of the ring baffle of the present invention.
Description of reference numerals:
1-ceramic inner tube; 2-metal sleeve; 3-an annular baffle; 31-an annular body portion; 32-welding the fixing part; 4-expansion gap.
Detailed Description
To further illustrate the technical means and effects of the present invention adopted to achieve the intended purpose of the invention, the following detailed description is given with reference to the accompanying drawings and preferred embodiments.
Referring to fig. 1 to 3, a novel wear-resistant short tube includes a ceramic inner tube 1, a metal sleeve 2 and two annular baffles 3, wherein the ceramic inner tube 1 is sleeved inside the metal sleeve 2, an expansion gap 4 is formed between an outer wall of the ceramic inner tube 1 and an inner wall of the metal sleeve 2, the annular baffles 3 are composed of an integrally formed annular main body portion 31 and a welding fixing portion 32, the welding fixing portion 32 is an annular part and is perpendicular to the annular main body portion 31, so that the annular baffles are in an end cover shape, an opening diameter of the annular baffles is equal to an inner diameter of the ceramic inner tube, and an inner diameter of the welding fixing portion is equal to an outer diameter of the metal sleeve; two ring baffle 3 cover respectively in metal sleeve 2's upper and lower opening part, and further realize each ring baffle 3 and metal sleeve 2's relatively fixed through the terminal surface of the welded fastening portion 32 that corresponds and metal sleeve's outer wall welding, consequently ring baffle's fixed mode in this embodiment is improved by original embedded welded fastening (promptly with metal sleeve inner wall welded fastening) and is welded with the metal sleeve outer wall with the help of welded fastening portion, thereby can avoid inside and contact the ceramic inner tube of welding solution infiltration expansion gap and form the weld bead in welding process, make wear-resisting nozzle stub wholeness good, the ceramic inner tube is difficult cracked, the steady operation cycle of very big extension equipment.
When the wear-resistant short pipe of the utility model is manufactured, one end of the metal sleeve 2 is welded and fixed with one annular baffle 3, then the ceramic inner pipe 1 is put in, and the other annular baffle 3 at the other end is welded; preferably, the annular baffle plate is welded and fixed, and then a gap for expanding the ceramic inner pipe is formed between the inner end face of the annular baffle plate and the upper/lower end face of the ceramic inner pipe.
The above description is only a preferred embodiment of the present invention, and any person skilled in the art can easily modify, change or modify the above embodiments according to the technical spirit of the present invention without departing from the scope of the present invention.
Claims (4)
1. The utility model provides a novel wear-resisting nozzle stub, its characterized in that includes ceramic inner tube, metal casing and two ring baffle, ceramic inner tube suit is inside metal casing, and has the expansion gap between the outer wall of ceramic inner tube and the metal casing's inner wall, ring baffle comprises integrated into one piece's annular main part and welding fixed part, and welding fixed part and annular main part mutually perpendicular set up, and two ring baffle cover respectively in metal casing's upper and lower opening and further through the welding fixed part that corresponds and metal casing outer wall welding in order to realize ring baffle and metal casing's fixed.
2. A new wear-resistant neck as claimed in claim 1, wherein: the diameter of the opening of the annular baffle is equal to the inner diameter of the ceramic inner pipe.
3. A new wear-resistant neck as claimed in claim 1, wherein: and a gap is reserved between the inner end face of the annular baffle and the ceramic inner tube after the annular baffle is welded and fixed.
4. A new wear-resistant neck as claimed in claim 1, wherein: the inner diameter of the welding fixing part is equal to the outer diameter of the metal sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120434518.1U CN214947006U (en) | 2021-02-26 | 2021-02-26 | Novel wear-resistant short pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120434518.1U CN214947006U (en) | 2021-02-26 | 2021-02-26 | Novel wear-resistant short pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214947006U true CN214947006U (en) | 2021-11-30 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120434518.1U Active CN214947006U (en) | 2021-02-26 | 2021-02-26 | Novel wear-resistant short pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214947006U (en) |
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2021
- 2021-02-26 CN CN202120434518.1U patent/CN214947006U/en active Active
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