CN201037576Y

CN201037576Y - Elbow pipe with abrasion-proof lining

Info

Publication number: CN201037576Y
Application number: CNU200720012584XU
Authority: CN
Inventors: 崔世库
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-06-12
Filing date: 2007-06-12
Publication date: 2008-03-19
Anticipated expiration: 2017-06-12

Abstract

The utility model relates to a bend pipe with abrasion resistance lining, which comprises a bend pipe, an elbow and a tee joint T, wherein, a layer of abrasion resistant lining is embedded or painted on the inner wall of the bend pipe, the thickness of the lining can be even or uneven, and a wire mesh or rivets can be arranged or not arranged on the inner wall of the bend pipe. The inner wall of the bend pipe can be fully spread or partly spread with the abrasion resistant lining, the thickness of the lining can be 5-100mm based on different service conditions. As the utility model preferably adopts silicon carbide reaching 9.0 level of Moh's hardness as the lining of the bend pipe, compared with alloy steel and abrasion resistant cast iron and rubber, the rub fastness and service life of the bend pipe can improve by about 10 folds. In addition, the comprehensive physical and chemical properties of the bend pipe such as medium corrosion resistance, cavitation erosion resistance, and high temperature resistance are also improved to verified degrees, thereby remarkably saving the cost of pipeline update and maintenance and improving the availability coefficient of the whole pipeline. The utility model is suitable for larger-caliber bend pipes.

Description

Bend pipe with wear-resisting back boxing

Technical field

The utility model belongs to the bend pipe that a kind of pipeline or pump class connect, be specifically in a kind of bend pipe, elbow and the threeway at the larger caliber pipeline wall liner dress with the bend pipe of wear-resisting back boxing.

Background technique

Pipeline is various liquid, powder conveying is main and requisite carrier.And have pipeline that steering linkage members such as bend pipe, elbow and threeway just must be arranged, so bend pipe is the throat of conveyance conduit, also is link the weakest in the pipeline.Industries such as metallurgy, mine, chemical industry, electric power, pottery, cement particularly except that liquid, also contain a large amount of impurity, dirt and poisonous, harmful etc. have corrosive material in the effluent.Bend pipe position itself just is in the place that is hit, washes away with the pressure maximum, corrodes the corrosion and the action of rust of thing in addition, make bend pipe in whole delivery line, become wearing and tearing maximum, damage the heaviest, the easiest position of piercing leakage.In case bend pipe is worn out or corrosion, just must change immediately; The replacing of bend pipe must relate to closing of whole conveyance conduit, has not only increased the checking maintenance expense, and directly has influence on the normal use of whole piece pipeline.Therefore how to improve the wear resistance and the decay resistance of bend pipe, just to become a problem that needs to be resolved hurrily the working life that prolongs bend pipe.

Summary of the invention

The purpose of this utility model aims to provide a kind of being convenient to exactly and makes, and is with low cost, resistance to wears, corrosion resistant bend pipe with wear-resisting back boxing.For this reason, the technical measures taked of the utility model are:

With the bend pipe of wear-resisting back boxing, be promptly to serve as a contrast in elbow internal wall insert or application the high-abrasive material back boxing is housed, the thickness of back boxing is uniform thickness or uniform thickness not.The elbow internal wall setting, also can not be provided with wire netting or the nail metal rivet.

The high-abrasive material back boxing can be taked full lining dress or part lining dress.

According to the difference of service condition, the thickness of silicon carbide back boxing is generally 5～100mm.

Described high-abrasive material comprises silicon carbide, corundum, high aluminium material or its mixture.Consider that from cost and combination property what preferentially recommend is silicon carbide.

Bend pipe described in the utility model comprises bend pipe, elbow and threeway.Its material and moulding process comprise cast iron, cast steel and alloy bend pipe etc.; Existing casting also has welding or mold pressing, brake forming.Its applicable scope contains inlet/outlet bend pipe, short circuit bend pipe, pipeline bend pipe and all kinds of elbow, threeway of various pumps etc.Its bend pipe internal diameter specification that is suitable for is bigger, and bend pipe internal diameter specification is more than ￠ 30mm, so that application usually.

Because the utility model preferentially adopts Mohs hardness to reach 9.0 grades silicon carbide as the back boxing of bend pipe, so its rub proofness, working life compare with alloyed steel, wear resisting cast iron, abrasive rubber etc., all can improve about 10 times; And comprehensive physics, chemical properties such as its medium corrosion resistance, gasproof erosion property, heat-resisting quantity all have raising in various degree; And its fabricating cost reduces on the contrary, the resource abundance.Use the utility model will significantly save the expense that pipeline upgrades and pipeline is safeguarded, overhauled, improve the operating rate of whole pipeline.

Description of drawings

Fig. 1 adorns the not bend pipe structure figure of the wear-resisting back boxing of uniform thickness band for the part lining.

Fig. 2 is the B-B cross section revolved sectional view of Fig. 1.

Fig. 3 adorns the not bend pipe structure figure of the wear-resisting back boxing of uniform thickness band for full lining.

Fig. 4 is the B-B cross section revolved sectional view of Fig. 3.

Fig. 5 adorns the not three-port structure figure of the wear-resisting back boxing of uniform thickness band for the part lining.

Fig. 6 is the A-A cross section revolved sectional view of Fig. 5.

Fig. 7 is the three-port structure figure of the wear-resisting back boxing of full lining dress uniform thickness band.

Fig. 8 is the A-A cross section revolved sectional view of Fig. 7.

Among the figure: 1 is bend pipe outer arc metallic walls, and 2 is the silicon carbide back boxing, and 3 is arc metallic walls in the bend pipe, and 4 is the high aluminium material back boxing, and 5 is wire netting, and 6 are the threeway metallic walls, and 7 is silicon carbide, corundum, high alumina mixture back boxing, and 8 is rivet, and 9 is the corundum back boxing.

Embodiment

Below in conjunction with drawings and Examples the utility model is further described.

The lining dress method of bend pipe and elbow is essentially identical.Now with bend pipe internal diameter 350mm, external diameter 435mm is an example.

Embodiment 1: the part lining is adorned not uniform thickness silicon carbide back boxing bend pipe.

By Fig. 1, Fig. 2 as seen, from the bend pipe center of circle, in 120 ° of scopes that radius arc metallic walls 3 in bend pipe is inswept, do not serve as a contrast dress silicon carbide back boxing 2; In 240 ° of remaining scopes, 2 of the silicon carbide back boxings of lining dress are by the direction progressive additive of arc metallic walls 3 in the bend pipe to bend pipe outer arc metallic walls 1; Place, arc top in bend pipe outer arc metallic walls 1 reaches the thickest-37mm; The bend pipe head is straight one section with intermediate gauge and same thickness transition.The method of its lining dress is taked artificial application or mechanical packing.

Embodiment 2: full lining dress close plating net high aluminium material back boxing bend pipe.

By Fig. 3, Fig. 4 as seen, the method for full lining dress close plating net high aluminium material back boxing bend pipe is basic identical with part lining dress silicon carbide back boxing.Different is: at first, hang up wire netting 5 in the inside of bend pipe metallic walls 1, the method for extension can adopt welding, rivets or lay, also can take the wear-resisting back boxing of application one deck after, again wire netting 5 is put into, and then is coated with.Secondly, also be coated with on the arc metallic walls 3 in the whole bend pipe high aluminium material back boxing 4 is housed, just thickness is thin slightly, and its thickness is thick more the closer to bend pipe outer arc metallic walls 1.

The lining dress mode of threeway also is divided into part lining dress and adorns two kinds with full lining.With the reducing tee is example: straight-through big mouthful of external diameter 370mm, internal diameter 340mm, osculum external diameter 260mm, internal diameter 230mm, angle external diameter 170mm, internal diameter 140mm.

Embodiment 3: nail rivet portion lining dress silicon carbide, corundum, the threeway of high aluminium material mixture back boxing.

Its lining dress method and step are identical with part lining dress silicon carbide back boxing bend pipe basically.By Fig. 5, Fig. 6 as seen, distinguishing slightly one is to need to nail on dispersedly in threeway metallic walls 6 earlier metal rivet 8; The 2nd, straight-through big mouthful straightway is taked threeway metallic walls 6 to connect angle one side to the angle root and do not serve as a contrast dress silicon carbide, high aluminium material mixture back boxing 7 in 120 ° of scope, all the other 240 ° are not had angle side silicon carbide, corundum, high aluminium material back boxing 7 and thicken gradually by connecing angle one side direction, reach the thickest-45mm at no angle side dome.All all serve as a contrast dress silicon carbide, corundum, high aluminium material back boxing 7 on the metallic walls 4 of all the other straight-through osculums and angle section, and take not uniform thickness application.

Embodiment 4: the threeway of full lining dress corundum back boxing.

Its lining dress method and step and part lining are adorned the identical of silicon carbide, corundum, the threeway of high aluminium material back boxing.By Fig. 7, Fig. 8 as seen, difference is that whole linings are equipped with corundum back boxing 9 on the metallic walls 6 of straight-through big mouthful of section, osculum section and angle section, and all lining dresses is the corundum back boxing 9 of same thickness-15mm.

The selection of thickness mainly is to determine according to service condition.The position that wearing and tearing are heavy, easy to wear, not corrosion resistant material, the character of fed sheet of a media and the content of impurity etc. is the factor that emphasis need be considered.Simultaneously, the clean bore that also should consider to serve as a contrast dress back boxing back elbow must satisfy the requirement of quantity delivered, and weight can not increase too much,, promptly will take into account under the prerequisite made from maintenance cost design and the preferred thickness of the best in order to avoid influence installation and maintenance.Its thickness range generally is advisable at 5～100mm, and then back boxing bonding is not firm less than 5mm, and is easily broken or peel off; Too thick then weight strengthens, and cost improves, and influence is changed and maintenance.

For the welding bend pipe, require defectives such as weld seam must not have crackle, current interruption, burns, arc crater, and inner wall surface is smooth smooth, no iron filings, burr, grease etc. influence the material and the defective existence of application back boxing quality.Must clear up iron rust for the bend pipe that iron rust is arranged; When used bend pipe is installed additional back boxing, also must thoroughly clear up elbow internal wall.

The utility model be suitable on the bend pipe of big caliber, using with wear-resisting back boxing bend pipe, caliber is too little then can't application.

Claims

1. the bend pipe with wear-resisting back boxing is characterized in that, promptly serves as a contrast in elbow internal wall insert or application the high-abrasive material back boxing is housed, and the thickness of back boxing is uniform thickness or uniform thickness not; Elbow internal wall setting or wire netting, metal rivet are not set.

2. the bend pipe with wear-resisting back boxing according to claim 1 is characterized in that, the thickness of described high-abrasive material back boxing is 5～100mm.

3. the bend pipe with wear-resisting back boxing according to claim 1 is characterized in that, described high-abrasive material back boxing is full lining dress or part lining dress.

4. the bend pipe with wear-resisting back boxing according to claim 1 is characterized in that described bend pipe comprises bend pipe, elbow and threeway.

5. the bend pipe with wear-resisting back boxing according to claim 1 is characterized in that, described high-abrasive material comprises silicon carbide, corundum, high aluminium material or its mixture; What preferentially recommend is silicon carbide.