CN212250444U - Short section capable of preventing acid corrosion - Google Patents
Short section capable of preventing acid corrosion Download PDFInfo
- Publication number
- CN212250444U CN212250444U CN201922441415.3U CN201922441415U CN212250444U CN 212250444 U CN212250444 U CN 212250444U CN 201922441415 U CN201922441415 U CN 201922441415U CN 212250444 U CN212250444 U CN 212250444U
- Authority
- CN
- China
- Prior art keywords
- flange
- sleeve
- short section
- pipe
- plastic
- 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
Landscapes
- Flanged Joints, Insulating Joints, And Other Joints (AREA)
Abstract
The utility model relates to the technical field of carbide slag desulfurization, in particular to an acid corrosion resistant nipple, which comprises a nipple body, a sleeve and a flange gasket, wherein the outer diameter of the sleeve is consistent with the inner diameter of the nipple body, the sleeve is sleeved in the nipple body, and the two ends of the sleeve respectively extend out of the two ends of the nipple body; the short section body is a stainless steel pipe, and the sleeve is a plastic pipe such as PVC, PE, PPR and the like; the length of the sleeve is more than 1.5 times longer than that of the nipple body; the pipe nipple is characterized in that a flange is welded at one end of the pipe nipple body, a flange with the same diameter as the flange of the pipe nipple body is welded at one end of a plastic pipe with the same outer diameter as the inner diameter of the pipe nipple body, and a rubber gasket with the same inner diameter as the inner diameter of the sleeve is added between the two flanges before the sleeve is inserted and then compacted. The problem of acid addition and corrosion prevention is solved, and safe and stable production conditions are provided for other same working conditions.
Description
Technical Field
The utility model relates to a carbide slag desulfurization technical field, concretely relates to short section of acid corrosion prevention.
Background
In the carbide slag desulfurization process, in order to ensure the pH and the oxidation effect of the gypsum slurry, a method of adding acid at the inlet of each oxidation pond pump is commonly adopted. The main component of the acid is sulfuric acid of chlorine gas in a dry chlor-alkali plant, the concentration of which is about 70 percent, and a large amount of chloride ions in the sulfuric acid have strong corrosivity to metals. Because the main pipe is made of stainless steel, the original acid adding pipe adopts a phi 25 duplex stainless steel short joint welded at the inlet of the pump and then connected with the plastic acid feeding pipe, the stainless steel short joint is corroded and leaks quickly (the service life is only 1-2 months), the replacement is frequent, and the manufacturing cost and the labor cost are increased.
At present, the method is theoretically feasible by lining the pipeline with rubber to avoid short section corrosion, however, in the actual use process, on one hand, the rubber lining is damaged at the welding position of the rubber lining pipe and the pump inlet pipe, the purpose of separating the metal short section from acid cannot be achieved, and the contact part can be corroded as well; on the other hand, if the pump inlet and the short acid adding piece are connected by plastic pipes, the operation amount is large, the cost is high, and the economic benefit is poor.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a short section of acid corrosion prevention solves the anticorrosive problem of acidification, provides the production condition of safety and stability under other equal operating modes.
In order to achieve the above object, the utility model adopts the following technical scheme:
the short section comprises a short section body and a sleeve, wherein a flange is welded at one end of the short section body; the outer diameter of the sleeve is the same as the inner diameter of the short section body, the sleeve is sleeved in the short section body, a plastic flange is welded at one end of the sleeve corresponding to the flange, the plastic flange is attached to the end face of the flange and aligned with the eye hole of the flange, and the other end of the sleeve extends out of the short section body.
Preferably, a rubber gasket is additionally arranged between the plastic flange on the sleeve and the flange and then compacted, and the holes of the flange are aligned.
As a preferred scheme, the nipple body is a stainless steel pipe, and the sleeve is a PVC, PE or PPR plastic pipe.
As a preferred scheme, the length of the sleeve extending out of the nipple body is 1.5 times or more than the length of the nipple body.
As a preferred scheme, still include the flange gasket supporting with the flange, the flange gasket laminating is in the plastics flange outside, is used for with other flange structure direct laminating.
Preferably, the inner diameter of the flange gasket is consistent with the inner diameter of the sleeve.
Compared with the prior art, the utility model discloses following beneficial effect has:
the utility model adds the sleeve pipe matched with the inner wall of the short section body in the short section body, the sleeve pipe is provided with the plastic flange, on one hand, the short section and the accessories (such as the flange and the like) thereof do not need to be completely replaced, only the sleeve pipe with the flange needs to be added, the manufacturing cost is lower, the manufacturing is simpler, the cost can be effectively saved, and the realization difficulty is reduced; on the other hand, the mode of additionally arranging the sleeve and the plastic flange can completely isolate the nipple body from acid, thereby avoiding the occurrence of loopholes such as welding seams, heat cracks and the like and having good use effect.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a sectional view of the present invention.
Wherein, the names corresponding to the reference numbers are:
1-short section body, 2-sleeve, 3-rubber gasket, 4-flange, 5-flange gasket, 6-plastic flange and 7-flange interface.
Detailed Description
The present invention will be further described with reference to the following description and examples, which include but are not limited to the following examples.
The purpose of this embodiment is in order to provide a short section that prevents acid corrosion, see fig. 1 and 2, this short section includes short section body 1, sleeve 2, rubber gasket 3, flange 4, flange gasket 5 and plastic flange 6.
Wherein, the nipple body 1 is a stainless steel nipple, and in the prior art, a flange of the stainless steel nipple is usually used for connecting a flange interface 7 (such as the right side of the nipple in fig. 1) of a plastic acid delivery pipe and an inlet (the left side of fig. 1 is omitted) of a welding connection acid-proof pump. Stainless steel nipple joint body is direct to be worn to leak with sour contact, will be corroded by chloridion in sour and the acid very fast, and life only has one or two months, even at nipple joint body inside lining glue, because the lining glue also can be melted to the high fever of welded, causes the condition such as lining glue damage to take place, so given sour "can take advantage of the machine promptly", let sour and stainless steel nipple joint still contact, corrode and wear to leak.
Consequently, the casing 2 that the external diameter is unanimous with its internal diameter is gone into in nipple joint body 1 to this embodiment, and the casing adopts plastic tubing such as PVC, PE, PPR, and it has certain toughness, even the external diameter is unanimous with nipple joint body 1 internal diameter, also can be smoothly and convenient installation.
The two ends of the short section body 1 can be welded with adjacent pipelines or pumps, connected with flanges and the like according to working conditions. Take the left end of this embodiment nipple joint body 1 and pump inlet welding, the right-hand member is connected with the flange interface 7 of sending sour hose as the example. The left sleeve extends out of the nipple body by 1.5 times in length to extend into the pump inlet pipeline after passing through the welding seam, and the welding seam is sealed. 1 right side welding of nipple joint body has supporting flange 4, the one end relative with this on the sleeve pipe then the welding have plastic flange 6, and plastic flange 6 is the same with the sleeve pipe material, and plastic flange model and nipple joint body are unanimous, and after the sleeve pipe was installed, plastic flange 6 and 4 terminal surface laminating of flange, and the eyelet on the plastic flange aligns with the flange pore. And a flange gasket 5 with the inner diameter consistent with that of the sleeve is arranged on the outer side of the plastic flange 6, and then bolts are inserted into the flange eyelets, the eyelets of the plastic flange 6 and the eyelets of the flange connector 7 of the acid delivery pipe for connection and fastening after the flange eyelets, the eyelets and the eyelets are aligned.
The embodiment is mainly used for improving the short section which is in use or is about to be put into use, the cost is low, the improvement method is simple, the practicability is high, and the specific improvement operation is as follows:
firstly, welding a stainless steel nipple body on an inlet pipe of a pump, and then welding a flange; welding a plastic flange on the end face of the sleeve, and then sleeving the rubber gasket 3; then inserting the sleeve into the short-section body until the flange, the rubber gasket and the plastic flange of the sleeve are tightly attached; and finally, pressing the flange gasket 5 and the flange joint of the acid delivery pipe to the outer side of the plastic flange, and connecting the flange gasket and the flange joint by bolts after compression.
The short section improved by the method has the following effects:
firstly, welding is carried out firstly, and then the sleeve is arranged, so that the lining is prevented from being damaged in the connecting mode, the replacement frequency of the lining is greatly reduced after the lining is installed, and the corrosion prevention effect is good;
the manufacturing is simple, the material source is wide, the single person can manufacture the material at any time and place, and the time, the labor and the cost are saved;
compared with the prior connection mode of directly welding the duplex stainless steel short joint, the short joint is more durable, the short joint with the acid needs to be replaced in the prior art on average every month, and the short joint is not replaced after being used for one year after the technology is adopted;
fourthly, the practicability is strong, and the economic benefit is more beneficial.
Claims (6)
1. The short section capable of preventing acid corrosion is characterized by comprising a short section body (1) and a sleeve (2), wherein a flange (4) is welded at one end of the short section body; the outer diameter of the sleeve (2) is the same as the inner diameter of the short section body (1), the sleeve is sleeved in the short section body, a plastic flange (6) is arranged at one end of the sleeve corresponding to the flange, the plastic flange is attached to the end face of the flange and aligned to the eye holes of the two flanges, and the other end of the sleeve extends out of the short section body.
2. The short joint capable of preventing acid corrosion according to claim 1, wherein a rubber gasket (3) is additionally arranged between the plastic flange on the sleeve (2) and the flange (4) and then compacted, and the flange holes are aligned.
3. The short section capable of preventing acid corrosion according to claim 1, wherein the short section body (1) is a stainless steel pipe, and the sleeve (2) is a PVC, PE or PPR plastic pipe.
4. The short section capable of preventing acid corrosion according to claim 1, wherein the length of the sleeve (2) extending out of the short section body (1) is 1.5 times or more of the length of the short section body.
5. The short joint capable of preventing acid corrosion according to claim 1, further comprising a flange gasket (5) matched with the flange (4), wherein the flange gasket is attached to the outer side of the plastic flange (6) and is used for being directly attached to other flange structures.
6. A short piece against acid corrosion according to claim 5, characterized in that the inner diameter of the flange gasket (5) is identical to the inner diameter of the casing (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922441415.3U CN212250444U (en) | 2019-12-30 | 2019-12-30 | Short section capable of preventing acid corrosion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922441415.3U CN212250444U (en) | 2019-12-30 | 2019-12-30 | Short section capable of preventing acid corrosion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212250444U true CN212250444U (en) | 2020-12-29 |
Family
ID=73971544
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922441415.3U Active CN212250444U (en) | 2019-12-30 | 2019-12-30 | Short section capable of preventing acid corrosion |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212250444U (en) |
-
2019
- 2019-12-30 CN CN201922441415.3U patent/CN212250444U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN212250444U (en) | Short section capable of preventing acid corrosion | |
| CN201159346Y (en) | Novel connecting structure for thin wall stainless steel tube | |
| CN101270837A (en) | Non-welding flange-connection stainless steel metal flexible pipe and production method | |
| CN201193744Y (en) | Solderless stainless steel metal hose | |
| CN206943623U (en) | A kind of large diameter pipe connector | |
| CN206257394U (en) | A kind of improved Flange | |
| CN212616847U (en) | Corrosion-resistant connecting joint for oil and gas conveying non-metallic pipeline | |
| CN101265997A (en) | Non-welding flange connected omega type non-corrodible steel metal hose and manufacture method | |
| CN110159849A (en) | A kind of pipeline chaining structure | |
| CN204647602U (en) | A kind of composite bimetal pipe pipe end linkage structure | |
| CN211639051U (en) | Modular elbow end face machining clamp | |
| CN115111444A (en) | Plastic-lined pipeline branch pipe connecting structure | |
| CN209458555U (en) | A kind of slag feed pipe non-metal expansion joint | |
| CN108194741B (en) | Compressed gas supply pipeline | |
| CN2692458Y (en) | Under well gas extraction spiral pipe | |
| CN201193745Y (en) | Solderless metal contact sealing stainless steel metal hose | |
| CN211550924U (en) | Corrosion-resistant petroleum pipeline | |
| CN201193742Y (en) | Solderless flange-connected stainless steel metal hose of word 'omega' shap | |
| CN212251535U (en) | Anti-fatigue welding structure of metal corrugated pipe assembly | |
| CN215208660U (en) | Nuclear power plant sodium hypochlorite dosing pipeline connecting structure | |
| CN101270839A (en) | Non-welding metal contact sealing stainless steel metal flexible pipe and production method | |
| CN101270840A (en) | Non-welding fabrication type fire-fighting spraying metal flexible pipe and production method | |
| CN219102348U (en) | Stainless steel and PE adapter | |
| CN213685701U (en) | Prevent product oil pipeline of leakage | |
| CN215111062U (en) | Metal hose with internal and external anti-corrosion functions |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |