TH101247A - Connecting head structure of high pressure fuel injection pipe - Google Patents

Abstract

DC60, the structure of the connecting head of the high pressure fuel injection pipe is provided in a way to avoid Interversion Between annular flanges And the opposite parts by keeping the The axial length of the pipe of the connection head is sufficient. And make a good seal to prevent Leakage during built-up corrosion Due to the high pressure of not less than 300 MPa, the connection head structure of this high pressure fuel injection pipe. On the connecting end of thick-walled steel pipe there is a spherical shoulder, annular flange. And functions as a spherical cone Protruding Continued from duty as a shoulder Where the washers and mounting flanges are put together and have the characteristics that When the thick-walled steel pipe is t (wall thickness) / D (outer diameter) <0.3, then the distance in the axial direction of the L1 pipe from the connection head to the rear. Of the annular flange will be from 0.38D to 0.7D and the radius of the sphere R of the shoulder duty will be from 0.45D to 0.65D and the outer diameter DI of the annular flange will be from 1.2D to 1.4D at Which faces along the edges around the inner circle of the connecting head Will consist of exam duties Approaching each other in two parts With a cross-section in the axial direction Of the pipe of the steel pipe expansion flared The body towards the opening of the pipe body

Claims (8)

Disclaimer (all) which will not appear on the advertisement page: edit 27/04/58 1. The connection head structure of the high pressure fuel injection pipe on the connecting end of the hose. Thick-walled steel And some diameter is included The front is a round shoulder. An annular flange formed at a distance from the shoulder front in the axial direction of the pipe and a conical face with a truly spherical face that is directed towards the end and extends from it. The front part is the shoulder to the annular flange or to the immediate vicinity of the Annular flange Anchors are attached to directly or indirectly overlap the front, back of the front. Ring-shaped flange Where when thick-walled steel pipes And thin diameter with wall thickness / outer diameter D &lt; 0.3, distance, axial direction, pipe L1 from the connecting head end to the front, back. The radius of the ring flange is from 0.38 D to 0.7 D, the radius of the circular body R of the shoulder front is from 0.45 D to 0.65 D, and the outer diameter D1 of the annular flange is from 1.2 D to 1.4 D where In which the fore along the inner circumference of the connecting head is composed of two tapered front sections A step with a cross-sectional profile in the axial direction of a steel pipe extending through the tube channel. 2. The connection head structure of the high pressure fuel injection pipe on which the connecting end of the pipe is Thick-walled steel And some diameter is included The front is a round shoulder. An annular flange formed at a distance from the shoulder front in the axial direction of the pipe and a conical face with a truly spherical face that is directed towards the end and extends from it. The front part is the shoulder to the annular flange or to the immediate vicinity of the Annular flange Anchors are attached to directly or indirectly overlap the front, back of the front. Ring-shaped flange Where when thick-walled steel pipes And thin diameter with wall thickness / outer diameter (formula), distance, axial direction, pipe L1 from the connecting head end to the front, back. The radius of the ring flange is from 0.38 D to 0.7 D, the radius of the circular body R of the shoulder front is from 0.45 D to 0.65 D, and the outer diameter D1 of the annular flange is from 1.2 D to 1.4 D where In which the fore along the inner circumference of the connecting head is composed of two tapered front sections Step with a cross-sectional profile in the axial direction of a steel pipe extending through the channel of the pipe. 3. The connection head structure of the high pressure fuel injection according to claim 2, where the tapered double front end is characterized by the total taper depth of LT from the connection tip is from 0.65 L1 to 1.3 L1. DT1 cavity diameter of the first tapered front part of the circumferential front. The inside of the connector head is from 1.15 Din to 1.7 Din, representing the inner diameter of the pipe. Thick-walled steel And thin diameter DT2 slot diameter of the second tapered front end on the connector tip end. And extends continuously from the front taper, the first stage is from 1.2 Din to 1.9 Din and the half-angle of the second taper? Is from 20 to 45 degrees 4. The connection head structure of the high pressure fuel injection pipe according to claim 3 where the pipe material Thick-walled steel And thin diameter, having a tensile strength of not less than 600 MPa 5. The connection head structure of the high pressure fuel injection pipe according to claim 2 where the pipe material Thick-walled steel And thin diameter, having a tensile strength of not less than 600 MPa 6. The connection head structure of the high-pressure fuel injection pipe according to claim 1, where the pipe material Thick-walled steel And thin diameter, having a tensile strength of not less than 600 MPa 7.The connection head structure of the high-pressure fuel injection pipe according to claim 1, where the tapered double front end is characterized by the total taper depth of LT from the connection tip is from 0.65 L1 to 1.3. L1 DT1 cavity diameter of the front part, tapered first stage of the circumferential front. The inside of the connector head is from 1.15 Din to 1.7 Din when Din represents the inner diameter of the pipe. Thick-walled steel And thin diameter DT2 slot diameter of the second tapered front end on the connector tip end. And extends continuously from the front taper, the first stage is from 1.2 Din to 1.9 Din and the half-angle of the second taper? Is from 20 to 45 degrees 8. Structure of the connection head of the high-pressure fuel injection pipe according to claim 7, where the pipe material Thick-walled steel And thin diameter has a tensile strength of not less than 600 MPa ------------------------------------- -------------------------------------