CN205938253U - Insulated joint of few leakage point of no welding seam - Google Patents

Abstract

The utility model discloses an insulated joint of few leakage point of no welding seam, including two cuffs pipe and a sleeve, adopt threaded connection or spline coupling between sleeve and the two cuffs pipe, the junction is the trapezium structure, and the surface is trapezoidal upper base and two sides. Have the insulated joint that the welding formula is connected now, usually because weld the not pleasing to the eye of the apparent ten minutes of interface unevenness, the utility model discloses a physics is connected between the machinery piece, belongs to the connection structure of an inside, does not result in aesthetic problems. Among the welding process, because the high temperature can lead to the sleeve sleeve pipe impaired, the utility model discloses a physics is connected between the machinery piece, belongs to cold and connects, this condition of high temperature destructive envelope barrel casing pipe can not appear. The surface area increase that the trapezium structure formed, the contact current is the increase just, just can be better prevent that physics is connected between the electrolytic corrosion pipeline machinery piece, can dismantle, when having avoided because of arbitrary parts damages, relation of connection owing to not dismantling leads to intact part in order to abandoning in the lump, has caused the waste in the very big degree.

Description

A kind of insulating joint of the few leakage point of no-welding-seam

Technical field

This utility model is related to a kind of insulating joint field and in particular to a kind of no-welding-seam lacks the insulating joint of leakage point.

Background technology

On commercial plant, the corrosion hazards of pipeline are typically big than the corrosion hazards in long distance pipeline, because in most of feelings Under condition, pipeline can form corrosion cell with reinforced concrete foundation.Area can be utilized in different types of commercial plant region Overcoming this corrosion hazards, method therefor is similar to the method for local cathodic protection for domain cathodic protection.Shielded region is Do not have conditional that is to say, that pipeline is not electrically insulated and the pipeline of branch between with being connected.Local cathodic protection Purpose is not only the battery current that will compensate external cathode structures, and will make the abundant cathodic polarization of protected structures, Thus meet criteria for cathodic protection requiring.In the cathodic protection of local the change of pipe to soil potential only near reference electrode relevant System, and rare with distant place ground potential contact.When metal-electrolyte dissolution corrosion system is subject to cathodic polarization, current potential is born and is moved, gold Belong to anodic oxidation reactionses overpotential to reduce, response speed reduces, thus metal erosion speed reduces, referred to as cathodic protection effect. It is called cathodic protection using the means of defence that cathodic protection effect mitigates metal equipment corrosion.Electricity is passed through by dispatch from foreign news agency road direction metal Son, for needed for depolarizing agent reduction reaction, so that metal oxidation reaction (betatopic reaction) is suppressed.When metal oxidation When response speed is reduced to zero, only there is depolarizing agent cathode reaction in metal surface.

Insulating joint is to be to prevent couple corrosion in pipelined, carries out the critical elements needed for cathodic protection to pipeline, It is mainly used in gas transmission and distribution system and gas pressure regulating station, its effect is by each intersegmental, gas pressure regulating station of gas transmission and distribution pipeline Mutually insulated isolation, protects it from electrochemical corrosion, increases the service life and between transmission ＆ distribution pipeline.

But the insulating joint that existing welding type connects, generally in shape uneven very unsightly, welded Cheng Zhong, due to high temperature failure sleeve shell material, when either component damages, due to non-detachable annexation, leads to intact Part also will abandon in the lump, causes waste largely.It is unfavorable for environmental protection.

Utility model content

Technical problem to be solved in the utility model is that sleeve pipe is detachably connected with sleeve it is therefore intended that providing a kind of nothing The insulating joint of the few leakage point of weld seam, solves the problems, such as that sleeve pipe is detachably connected with sleeve.

This utility model is achieved through the following technical solutions：

A kind of insulating joint of the few leakage point of no-welding-seam, including two sleeve pipes and a sleeve, sleeve and two sleeve pipes it Between be trapezium structure using the connection of threaded or spline, junction, surface is trapezoidal upper bottom and two sides.Existing weldering Connect the insulating joint of formula connection, usually because welding junction uneven aobvious very unsightly, this utility model adopts machine Physical connection between tool block, belongs to the attachment structure of an inside, does not affect the appearance.In welding process, due to the too high meeting of temperature Lead to sleeve sleeve pipe impaired, this utility model adopts physical connection between mechanical block, belongs to cold connection, is not in high temperature failure This situation of sleeve sleeve pipe.The surface area that trapezium structure is formed increases, and pick-up current just increases, just can be better prevent electric current Corrosion pipeline.

Described threaded, major diameter of thread is 6-12cm, bottom diameter is 5-11cm, the pitch diameter of thread is 5.5-11.5cm, Lead is 1-1.5cm, the number of leads is 5-7, lead angle is 30 ° -45 °.Threaded is that straight pipe thread connects, Thread form angle, crest is in circular arc, screws between screw thread no radial clearance, and compactness is good, and nominal diameter is the inside nominal diameter of pipe, extensively In the general connection for pipe-line systems such as water, coal gas, lubrications.

Described spline connection, bushing outer surface is internal spline, and sleeve inner is external splines；Spline-shaped is circle, diameter 5-10cm, flower number of teeth amount is 25-50, and flower odontoid is triangle cylinder, the gore of triangle cylinder, and base is 0.2- 0.6cm, a height of 0.4-0.9cm；The length of flower tooth is 3-5cm.Spline connection is made up of internal spline and external splines.Inside and outside spline It is multiple tooth part, the spline on inner periphery is internal spline, the spline on outer cylinder surface is external splines.Two kinds of companies The mode of connecing can reach the flexible dismounting between sleeve and sleeve pipe, installs.

Described sleeve arranges O-shaped rubber ring with the junction of sleeve pipe, and O-shaped rubber ring is enclosed within the interface position of junction.O-shaped Rubber ring is the belt rubber circle with circular cross-section, and being mainly used in mechanical part prevents liquid gentle in a static condition The leakage of body medium, type rubber ring provides a kind of not only effective but also economic potted component for designer, can solve sleeve and The gap problem of appearance is connected, to the effect of sealing between sleeve pipe.

Described O-shaped rubber ring is hydrogenation nitrile rubber O-shaped rubber ring or politef O-shaped rubber ring.O-shaped rubber ring is Hydrogenation nitrile rubber O-shaped rubber ring or politef O-shaped rubber ring.Hydrogenation nitrile rubber O-shaped rubber ring has good resisting The characteristic such as burn into anti tear and resistance to compression compression deformation, resistance to ozone, resistance to sunlight, oil resistivity etc. preferably, normally use temperature range be- 40 DEG C ~ 150 DEG C, cathodic protection can be carried out by pipeline.It is useful in washing machine, automobile engine system and Novel ring refrigeration system In, be not suitable for being used in alcohols, esters and aromatic solvent；Politef is in aviation, electric, chemical industry, machinery, instrument It is widely used as high-low temperature resistant, resistant material in the industry such as instrument, Treatment of Metal Surface, medicine, food, metallurgical smelting, hydraulic pressure, Coefficient of friction is low, anti-stick coating etc., and it has become the product do not replaced.Politef O-shaped rubber ring, normally using temperature Scope is -25 DEG C ~ 170 DEG C, because high-low temperature resistant, resistant material, coefficient of friction are low, by each section of gas transmission and distribution pipeline Between, mutually insulated isolation between gas pressure regulating station and transmission ＆ distribution pipeline, protect it from electrochemical corrosion, increase the service life.

This utility model compared with prior art, has such advantages as and beneficial effect：

1st, the insulating joint of the few leakage point of a kind of no-welding-seam of this utility model, type rubber ring had both provided one kind for designer Effective and economic potted component, can solve to connect the gap problem of appearance between sleeve and sleeve pipe, to the effect of sealing；

2nd, the insulating joint of the few leakage point of a kind of no-welding-seam of this utility model, politef O-shaped rubber ring, resistance to height Temperature, resistant material, coefficient of friction are low, because corrosion-and high-temp-resistant, by each intersegmental, gas pressure regulating of gas transmission and distribution pipeline Mutually insulated and between transmission ＆ distribution pipeline of standing is isolated, and protects it from electrochemical corrosion, increases the service life；

3rd, a kind of insulating joint of the few leakage point of no-welding-seam of this utility model, physical connection between mechanical block, can dismantle, Avoid because either component damage when, due to non-detachable annexation, lead to intact part also will abandon in the lump, cause Waste largely.

Brief description

Accompanying drawing described herein is used for providing this utility model embodiment is further understood, and constitutes the one of the application Part, does not constitute the restriction to this utility model embodiment.In the accompanying drawings：

Fig. 1 is this utility model structural representation.

Labelling and corresponding parts title in accompanying drawing：

1- sleeve pipe, 2- sleeve, 3- junction, 4-O type rubber ring.

Specific embodiment

For making the purpose of this utility model, technical scheme and advantage become more apparent, with reference to embodiment and accompanying drawing, The utility model is described in further detail, and exemplary embodiment of the present utility model and its explanation are only used for explaining this Utility model, is not intended as to restriction of the present utility model.

Embodiment 1：

As shown in figure 1, a kind of insulating joint of the few leakage point of no-welding-seam of this utility model, including two sleeve pipes 1 and one Sleeve 2, sleeve pipe 1 and sleeve 2 are cylinder type hollow body, and sleeve pipe 1 cavity diameter is 5 cm, and sleeve pipe 1 thickness is 1 cm, sleeve pipe 1 length is 30cm；Sleeve 2 cavity diameter is 6 cm, and sleeve 2 thickness is 1 cm, and sleeve 2 length is 25cm.Sleeve 2 and two sets Adopt threaded between pipe 1, major diameter of thread is 6cm, bottom diameter is 5cm, the pitch diameter of thread is 5.5cm, lead is 1cm, the number of leads are 5, lead angle be 30 threaded be physical connection between two mechanical block, can dismantle, so Avoid because either component damage when, due to tradition become attached to joint adopt welding type connect, because pad 3 is fixed from tearing open Unload, lead to intact part also will abandon in the lump, cause this problem of waste largely.Sleeve 2 and the connection of sleeve pipe 1 Place 4 setting O-shaped rubber ring.It is operated in subzero 30 degree of outdoor, O-shaped rubber ring adopts hydrogenation nitrile rubber O-shaped rubber ring, because Hydrogenation nitrile rubber O-shaped rubber ring, has anticorrosive, anti tear and resistance to compression compression deformation, normally use temperature range be -40 DEG C ~ 150℃.This insulating joint is connected on pipeline, you can start working.

Embodiment 2 difference from Example 1 is：

This utility model is a kind of insulating joint of the few leakage point of no-welding-seam, including two sleeve pipes 1 and a sleeve 2, covers Pipe 1 and sleeve 2 are cylinder type hollow body, and sleeve pipe 1 cavity diameter is 10 cm, and sleeve pipe 1 thickness is 2 cm, and sleeve pipe 1 length is 40cm；Sleeve 2 cavity diameter is 12 cm, and sleeve 2 thickness is 2 cm, and sleeve 2 length is 35cm.Operating ambient temperature is 50 degree, Connected mode couples for spline, and sleeve pipe 1 outer surface is internal spline, and sleeve 2 is internal to be external splines；Spline-shaped is circle, diameter 10cm, flower number of teeth amount is 50, and flower odontoid is triangle cylinder, the gore of triangle cylinder, and base is 0.6cm, high For 0.9cm；The length of flower tooth is 5cm.Junction is changed into trapezium structure, and surface is trapezoidal upper bottom 3cm and two sides 4.5cm.O-shaped rubber ring adopts politef O-shaped rubber ring, politef O-shaped rubber ring, high-low temperature resistant, corrosion-resistant material Material, coefficient of friction are low, normally use temperature range to be -25 DEG C ~ 170 DEG C.

Above-described specific embodiment, is entered to the purpose of this utility model, technical scheme and beneficial effect One step describes in detail, be should be understood that and the foregoing is only specific embodiment of the present utility model, is not used to limit Fixed protection domain of the present utility model, all any modifications within spirit of the present utility model and principle, made, equivalent replaces Change, improve, should be included within protection domain of the present utility model.

Claims (5)

1. the insulating joint of the few leakage point of a kind of no-welding-seam, including two sleeve pipes（1）With a sleeve（2）It is characterised in that：Set Cylinder（2）With two sleeve pipes（1）Between using the connection of threaded or spline, junction（3）For trapezium structure, surface is trapezoidal Upper bottom and two sides.

2. a kind of few leakage point of no-welding-seam according to claim 1 insulating joint it is characterised in that：Described screw thread is even Connect, major diameter of thread is 6-12cm, bottom diameter is 5-11cm, the pitch diameter of thread is 5.5-11.5cm, lead is 1-1.5cm, The number of leads is 5-7, lead angle is 30 ° -45 °.

3. a kind of few leakage point of no-welding-seam according to claim 1 insulating joint it is characterised in that：Described spline connection Connect, sleeve pipe（1）Outer surface is internal spline, sleeve（2）Internal is external splines；Spline-shaped is circle, diameter 5-10cm, the flower number of teeth Measure as 25-50, flower odontoid is triangle cylinder, the gore of triangle cylinder, base is 0.2-0.6cm, a height of 0.4-0.9cm；The length of flower tooth is 3-5cm.

4. a kind of few leakage point of no-welding-seam according to claim 1 insulating joint it is characterised in that：Described sleeve（2） With sleeve pipe（1）Junction（3）Setting O-shaped rubber ring（4）, O-shaped rubber ring（4）It is enclosed within the interface position of junction.

5. a kind of few leakage point of no-welding-seam according to claim 4 insulating joint it is characterised in that：Described O-shaped rubber Circle（4）For hydrogenating nitrile rubber O-shaped rubber ring（4）Or politef O-shaped rubber ring（4）.