CN101392858A - Steel oil pipe open flange sign indicating number - Google Patents

Abstract

The invention discloses a steel oil pipe edge opening flange code, which is suitable for flared pipeline connection, and comprises two flange plates which are fixed on a mounting surface and provided with conical notches, and a conical meson the bottom of which is propped against the mounting surface and provided with a flow guide hole, the edge opening flange code is adopted, welding is not needed in the whole mounting process, the mounting is simple, the disassembly and the assembly are convenient, compared with a clamping sleeve type steel pipe joint, the tightening torque is low, over-tightening can be prevented, the assembly is attractive, the production and the processing are easy, in addition, because the meson, the steel pipe and the flange plates are mutually tightly connected, the flange code has good comprehensive mechanical property, can bear higher working pressure, has the advantages of vibration resistance, difficult damage and the like, the stability and the reliability of the connection are improved, and the flange code is suitable for flared pipeline connection of hydraulic casting parts such as steel pipes, aluminum pipes, lining plastic metal pipes and the like on injection molding machinery, and brings much convenience to the connection work of the pipelines.

Description

Steel oil pipe open side flange code

technical field

The invention relates to a flange code, in particular to a flange code with an open edge for a specially connected hydraulic steel oil pipe.

Background technique

There are usually two methods for pipeline connection in the known prior art, one is flange connection, and the other is screw connection. Small-diameter pipes are generally connected with threads, but the tightening torque is large, and over-tightening often occurs during tightening, making disassembly and assembly inconvenient. Pipelines with larger diameters are mostly connected by flanges, and the combination of flanges and pipe joints is mostly welded. Due to the technical nature of the welding process, the required equipment is heavy, not suitable for field operations, and it is extremely inconvenient to disassemble. In addition, some pipes are difficult to weld due to the material relationship, such as aluminum pipes, plastic-lined metal pipes, etc., so welding flanges cannot be used to realize pipe connections, which brings a lot of inconvenience to the pipe connection work.

Contents of the invention

In order to overcome the deficiencies of the prior art, the invention provides a steel oil pipe split flange code with convenient disassembly, reliable use and simple structure.

The technical solution adopted by the present invention to solve its technical problems is:

An open-side flange code for steel oil pipes, suitable for flared pipe connections, including two paired flanges fixed on the installation surface and a meson with a bottom that leans against the installation surface and is provided with a diversion hole , the two flanges are all provided with a conical notch, and after the two flanges are assembled, the two conical notches form a conical hole; the outer surface of the meson is set to adapt to the conical hole The tapered surface of the meson, after the meson is embedded in the tapered hole, the surface of the tapered hole and the tapered surface of the meson form a clamping mouth for clamping the wall of the bell mouth of the pipeline.

As a further improvement of the present invention, the bottom of the meson and the tapered surface are provided with circular grooves, and sealing rings are installed in the circular grooves; the slope of the tapered hole is 37 degrees; correspondingly, the tapered The slope of the face is also 37 degrees.

As a further improvement of the present invention, the two paired flanges all extend to both sides along the axis of the conical notch so that the conical notch forms a stepped shape, and correspondingly the conical hole forms a cylinder at both ends and a middle It is a step shape of a circular platform; the meson extends to both sides along its axis to form a stepped shape with cylinders at both ends and a circular platform in the middle. Table tops and small diameter cylindrical surfaces are formed.

The beneficial effects of the present invention are: the open-side flange code of the present invention includes two flanges fixed on the installation surface with conical notches and a conical flange with a bottom that leans against the installation surface and is provided with a flow guide hole. When using the meson, first expand the mouth of the pipe to be connected according to the taper of the meson and the tapered notch, so that the mouth of the pipe is in the shape of a trumpet, then place the meson in the bell mouth and align it to the connection port, and then pass the two flanges through The bolts are fixed on the installation surface, and the bell mouth of the pipe is pressed, and the tapered surface formed by the tapered notch and the tapered surface of the meson clamp the bell mouth of the pipe. It can be seen that no welding is required during the entire installation process, and the installation is simple and convenient. It is easy to disassemble and assemble. Compared with the ferrule-type steel pipe joint, the tightening torque is low, and it can prevent over-tightening. It is also beautiful to assemble, easy to produce and process, and because the meson, steel pipe and flange are closely connected with each other, it has good comprehensive mechanics. performance, can withstand high working pressure, has the advantages of anti-vibration, not easy to break, etc., improves the stability and reliability of the connection, and is suitable for hydraulic parts on injection molding machinery, ships, engineering machinery, mining machinery and other machinery, such as steel pipes, The connection of flarable pipes such as aluminum pipes and plastic-lined metal pipes brings a lot of convenience to the connection work of pipes.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Fig. 1 is the overall structural representation of the present invention;

Fig. 2 is a sectional view of the present invention;

Fig. 3 is a sectional view of the flange of the present invention;

Fig. 4 is a sectional view of the meson of the present invention.

Detailed ways

Referring to Fig. 1 to Fig. 4, a steel oil pipe open edge flange code is suitable for flared pipe connection, which includes two paired flanges 1 fixed on the installation surface and the bottom against the installation surface The meson 2 with diversion hole 7 is arranged on it, the two flanges 1 of the present invention are all made of A3 steel, and the meson 2 is made of No. 45 steel. These two kinds of steel materials are widely used, and have certain plasticity and toughness, mechanical High strength, good cutting performance, and good comprehensive mechanical properties. The two flanges 1 are all provided with fixing holes, and the two flanges 1 are all provided with a conical notch 5, and the conical notch 5 can be reasonably set according to the outer diameter of the pipeline 8 to be connected. After the flange plate 1 is assembled, two tapered notches 5 form a tapered hole; the outer surface of the meson 2 is set as a tapered surface suitable for the tapered hole, and the meson 2 is embedded in the tapered hole. After the hole, the surface of the tapered hole and the tapered surface of the meson 2 form a clamping mouth for clamping the pipe wall of the pipe 8 bell mouth. The width of the clamping opening can be designed according to the thickness of the pipe wall, that is, by changing the conical face size.

During use, firstly, the mouth of the pipe to be connected is flared according to the taper of the meson and the tapered notch, so that the mouth of the pipe is trumpet-shaped, and a hole is tapped on the installation surface corresponding to the installation position of the flange fixing hole. In this step, flaring is generally suitable for forming a bell mouth of 37 degrees, so the inclination of the tapered hole in the novel use is 37 degrees, and the inclination of the tapered surface is also 37 degrees accordingly. Then place the meson in the bell mouth and align it to the connection port, then fix the two flanges on the installation surface with bolts 3, press the bell mouth of the pipe, the tapered surface formed by the tapered notch and the conical shape of the meson Clamp the bell mouth of the pipeline to complete the connection of the pipeline, and the liquid in the pipeline circulates from the diversion hole 7 of the meson 2.

It can be seen that no welding is required during the entire installation process, and the installation is simple and easy to disassemble. Compared with the ferrule-type steel pipe joint, the tightening torque is low, and it can prevent over-tightening. The steel pipe and the flange are closely connected with each other, have good comprehensive mechanical properties, can withstand high working pressure, have the advantages of anti-vibration, not easy to damage, etc., improve the stability and reliability of the connection, and are suitable for injection molding machinery and ships. The connection of hydraulic parts such as steel pipes, aluminum pipes, plastic-lined metal pipes and other expandable pipes on machinery, construction machinery, mining machinery, etc., brings a lot of convenience to the connection work of pipes.

As a further improvement of the present invention, the two paired flanges 1 extend to both sides along the axis of the conical notch 5 so that the conical notch 5 forms a step shape, and the two ends of the conical hole are formed as cylinders accordingly. , the step shape of a circular platform in the middle; the meson 2 extends to both sides along its axis to form a stepped shape with cylinders at both ends and a circular platform in the middle. The meson 2's conical surface and small-diameter cylindrical surface are formed. After the pipe is clamped, the small-diameter cylindrical surface of the meson 2 and the small-diameter cylindrical surface of the tapered hole are respectively pushed against the inner and outer pipe walls of the clamped pipe; the tapered hole The large-diameter cylindrical surface is tangent to the large-diameter cylindrical surface of the meson 2, and the flange 1 and the meson 2 are closely matched after installation. These structures further enhance the reliability of the pipe connection.

As a further improvement of the present invention, in order to enhance the sealing effect, the bottom of the meson 2 and the tapered surface of the present invention are provided with a circular groove 6, and a sealing ring 4 is installed in the circular groove 6 to effectively prevent The problem of oil leakage between the bottom of the meson 2 and the installation surface, the tapered surface of the meson 2 and the pipeline is solved.

Since the outer diameter and wall thickness of different types of pipes on the market have been standardized, the flange code of the present invention is designed according to GB/T3639-2000 and German DIN2391-1994 seamless steel pipe and wall thickness, and the flange size adopts SAE Dimension standard design, can mass produce open side flange codes suitable for different types of pipelines, and can also be specifically designed for specific pipelines.

Claims (8)

1, a kind of steel oil pipe edge-breaking flange, but the pipeline that is applicable to enlarging connects, it is characterized in that it comprises that two of being fixed on the attachment face lean on attachment face to the flange plate (1) of dress and bottom and are provided with the meson (2) of pod apertures (7), described two flange plate (1) are provided with a tapered indentations (5), and described two flange plate (1) form a cone shape hole to adorning latter two tapered indentations (5); The outer surface of described meson (2) is arranged to the conical surface that adapts with cone shape hole, and after described meson (2) was flush-mounted in described cone shape hole, the surface of cone shape hole and meson (2) conical surface formed the clamp port of clamping pipeline flared pipe wall.

2, steel oil pipe edge-breaking flange according to claim 1 is characterized in that described meson (2) bottom and conical surface are provided with annular recess (6), all are equipped with seal ring (4) in the described annular recess (6).

3, steel oil pipe edge-breaking flange according to claim 1, the gradient that it is characterized in that described cone shape hole are 37 degree; Correspondingly the gradient of conical surface also is 37 degree.

4, according to claim 1,2 or 3 described steel oil pipe edge-breaking flanges, it is characterized in that described two flange plate (1) to dress all make tapered indentations (5) formation step-like along the axle center of tapered indentations (5) to the both sides extension, correspondingly cone shape hole formation two ends are that cylinder, centre are step-like for round platform; It is that cylinder, centre are step-like for round platform that described meson (2) extends to form two ends along its axle center to both sides, and described clamp port is formed by the round table surface of cone shape hole and the round table surface and the path cylndrical surface of path cylndrical surface and meson (2).

5, steel oil pipe edge-breaking flange according to claim 4 is characterized in that pipeline is held the path cylndrical surface of back meson (2) and the path cylndrical surface of cone shape hole and leans inside and outside tube wall at the clamping pipeline respectively.

6, steel oil pipe edge-breaking flange according to claim 4 is characterized in that the cylndrical surface, big footpath of described cone shape hole cylndrical surface, big footpath and meson (2) is tangent.

7, steel oil pipe edge-breaking flange according to claim 1 is characterized in that described two flange plate (1) all adopt the A3 steel.

8, steel oil pipe edge-breaking flange according to claim 1 is characterized in that described meson (2) adopts No. 45 steel.

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