Upsetting head profile for high-pressure sealing of pipe

Abstract

The utility model relates to an upsetting head model of a pipe, in particular to an upsetting head model for high-pressure sealing of the pipe, which comprises a front-end sealing area, a front-end transition area, a large-diameter area, a rear-end pressing area, a rear-end arc transition area and a rear-end tubular transition area which are sequentially arranged from the tail end, and the areas can be formed through cold upsetting or hot upsetting. The upsetting head profile for high-pressure sealing of the pipe can meet the sealing requirement of pipe fitting connection in a high-pressure environment.

Description

Technical Field

[0001] The utility model relates to an upsetting head type for a pipe, in particular to an upsetting head type for high-pressure sealing of a pipe. Background Art

[0002] Upsetting is divided into cold upsetting and hot upsetting. Upsetting is one of the new processes of non-cutting metal pressure processing. It is a processing method that utilizes the plastic deformation of metal under the action of external force and uses the mold to redistribute and transfer the metal volume to form the required parts or blanks. The head shape formed by upsetting at the end of the pipe fitting helps to improve the sealing performance when connected to the counterpart, such as the Chinese utility model patent with publication number CN206723645U, named upsetting double sealing structure for automobile air conditioning pipeline.

[0003] In order to further improve the sealing ability of the upsetting head type under high pressure environment, it is necessary to improve the existing upsetting head type. Utility Model Content

[0004] Technical purpose: In order to overcome the deficiencies in the prior art, the utility model provides an upset head type for high-pressure sealing of pipes.

[0005] Technical solution: To achieve the above-mentioned purpose, the utility model discloses a forging head type for high-pressure sealing of pipes, including a front end sealing area, a front end transition area, a large diameter area, a rear end clamping area, a rear end arc transition area and a rear end tubular transition area arranged in sequence from the end, and the above areas can be formed by cold forging or hot forging.

[0006] Furthermore, the outer side surface of the front end sealing area is spherical or conical; when the outer side surface of the front end sealing area is spherical, the center of the sphere is located on the axis of the tube, and the intersection of the outer side surface of the front end sealing area and the end surface is transitioned through a rounded corner or not.

[0007] Furthermore, the outer side surface of the front end transition zone is conical or arc-shaped; when the outer side surface of the front end transition zone is conical, the transition cone angle of the cone is α, wherein α=30°~120°, and the transition cone angle should be determined according to the concave cone angle of the counterpart, and the maximum transition cone angle should be 1.5° smaller than the concave cone angle of the counterpart; when the outer side surface of the front end transition zone is arc-shaped, the radius of the front end transition zone should be determined by the smooth transition between the front end transition zone and the large diameter zone, and the center of the front end transition zone may be on the axis of the tube or not on the axis of the tube.

[0008] Furthermore, when the outer side surfaces of the front end sealing area and the front end transition area are both arc-shaped, the outer side surface of the front end sealing area and the outer side surface of the front end transition area may be the same arc section or different arc sections. If they are the same arc section, the center of the circle may be on the axis of the pipe fitting or may not be on the axis of the pipe fitting; when the outer side surface of the front end sealing area and the outer side surface of the front end transition area are conical, the outer side surface of the front end transition area and the outer side surface of the front end sealing area are the same cone section, and the transition cone angle should be between 30° and 120°. The transition cone angle should be determined based on the concave cone angle of the opponent, and the maximum transition cone angle should be 1.5° smaller than the concave cone angle of the opponent.

[0009] Furthermore, the outer diameter of the tube is defined as d1, and the outer diameter of the large diameter zone is defined as d2, wherein d1<d2≤1.5*d1; the junction between the large diameter zone and the front end transition zone is either a smooth transition or a contraction transition; the top edge and the bottom edge of the large diameter zone are arc free transitions formed by upsetting.

[0010] Furthermore, when the boundary between the large diameter area and the front end transition area is a contraction transition, the junction between the large diameter area and the front end transition area is an arc transition of a set size.

[0011] Furthermore, the rear end clamping area is either spherical, conical, or planar; when the rear end clamping area is spherical and the front end sealing area is spherical, the center of the rear end clamping area may or may not coincide with the center of the front end sealing area; when the rear end clamping area is a conical surface, its cone angle is defined as β, where β = 60°~150°; when the cone angle β = 180°, the rear end clamping area becomes planar.

[0012] Furthermore, the rear end arc transition zone adopts an arc transition to the rear end tubular transition zone.

[0013] Furthermore, the rear end tubular transition zone is a cone angle transition of 0° to 20° from top to bottom.

[0014] Furthermore, the length of the rear end tubular transition zone is f, where f=(0.5-1.5)*d1.

[0015] The above-formed upsetting head type is suitable for various metal material pipes with an outer diameter of φ4 to φ30cm.

[0016] The utility model of the upsetting head type used for high pressure sealing of pipes has the following technical effects:

[0017] Through reasonable regional design of the upsetting head shape, the use requirements of the pipe fittings in high-pressure environments can be met; the front sealing area can ensure the sealing strength of the head shape, the front transition area can prevent the stress concentration formed between the large diameter area and the front sealing area, and the rear tubular transition area can enhance the vibration resistance of the pipe fittings during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of embodiment 1;

[0019] Figure 2 It is a structural schematic diagram of the second embodiment;

[0020] Figure 3 This is a schematic diagram of the structure of Embodiment 3;

[0021] Figure 4 It is a structural diagram of embodiment 4.

[0022] In the figure, 1, front end sealing area; 2, front end transition area; 3, large diameter area; 4, rear end clamping area; 5, rear end arc transition area; 6, rear end tubular transition area. DETAILED DESCRIPTION

[0023] The following is combined with Figure 1 To Attachment Figure 4 The principles and features of the present invention are described, and the examples given are only used to explain the present invention, and are not used to limit the scope of the present invention.

[0024] Embodiment 1, as attached Figure 1 shown.

[0025] A ram head for high pressure sealing of pipes, comprising a front end sealing area 1, a front end transition area 2, a large diameter area 3, a rear end pressing area 4, a rear end arc transition area 5 and a rear end tubular transition area 6 arranged in sequence from the end. The outer side surface of the front end sealing area 1 is a spherical surface or a conical surface, and when the outer side surface of the front end sealing area 1 is a spherical surface, the center of the spherical surface is located on the axis of the pipe. The intersection of the outer side surface of the front end sealing area 1 and the end surface (i.e., the attached Figure 1 The transition from the front end transition zone 2 to the front end transition zone 2 at point A may be done through a rounded corner transition or not. In this embodiment, the outer side surface of the front end transition zone 2 is conical, and the transition cone angle of the cone is α, where α = 30° to 120°. Under the premise that the outer side surface of the front end transition zone 2 is conical, if the outer side surface of the front end sealing zone 1 is also conical, the outer side surface of the front end transition zone 2 and the outer side surface of the front end sealing zone 1 are the same section of the cone, that is, their transition cone angles are both 30° to 120°. The selection of the transition cone angle should be determined by the concave cone angle of the counterpart (that is, the component connected to the pipe fitting). The maximum transition cone angle should be 1.5° smaller than the concave cone angle of the counterpart. The outer diameter of the tube is defined as d1, and the outer diameter of the large diameter zone 3 is defined as d2, where d1<d2≤1.5*d1. In this embodiment, the junction between the large diameter zone 3 and the front end transition zone 2 is a smooth transition. At the top edge of the large diameter zone 3 (that is Figure 1 B in the middle) and the bottom edge (i.e. Figure 1(C in the figure) is a forged arc free transition. In this embodiment, the rear end clamping area 4 is either spherical or conical. When the rear end clamping area 4 is spherical and the front end sealing area 1 is spherical, the center of the rear end clamping area (4) may or may not coincide with the center of the front end sealing area 1; when the rear end clamping area (4) is a conical surface, its cone angle is defined as β, where β = 60° to 150°. The rear end arc transition area 5 uses an arc transition to the rear end tubular transition area 6. By setting a suitable arc radius, the structural stress can be reduced. The rear end tubular transition area 6 is a top-down cone angle transition of 0° to 20°, and the length of the rear end tubular transition area 6 is f, f = (0.5 to 1.5) * d1. Based on the above structure, this embodiment can be named a spherical or conical clamping smooth transition type upsetting head type.

[0026] Embodiment 2, as attached Figure 2 As shown,

[0027] Compared with the first embodiment, the present embodiment is different in that:

[0028] (1) The outer side surface of the front transition zone 2 is arc-shaped. Under this structural premise, if the outer side surface of the front sealing zone 1 is also arc-shaped, the outer side surface of the front sealing zone 1 and the outer side surface of the front transition zone 2 may be the same arc or may not be the same arc.

[0029] (2) The junction between the large diameter region 3 and the front transition region 2 is a contraction transition. Figure 2 The D in the figure is an arc transition of set size. Free arc transition refers to an arc transition that is naturally formed during the upsetting process without any size requirements; arc transition of designed size refers to an arc transition that needs to meet the design size requirements. The specific size of the arc transition can be determined based on the boundary matching the opponent and the transition smoothness of the head shape.

[0030] Based on the above structure, this embodiment can be named as a spherical or conical surface compression type shrinkage transition type upsetting head type.

[0031] Embodiment 3, as attached Figure 3 shown.

[0032] Compared with the first embodiment, the present embodiment is different in that:

[0033] (1) The rear end clamping area is flat.

[0034] Based on the above technical features, this embodiment can be named as a plane clamping smooth transition type upsetting head type.

[0035] Embodiment 4, as attached Figure 4 shown.

[0036] Compared with the second embodiment, the difference of this embodiment is:

[0037] (1) The rear end clamping area is flat.

[0038] Based on the above technical features, this embodiment can be named as a plane clamping shrinkage transition type upsetting head type.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A type of upsetting head for high pressure sealing of pipes, characterized in that: It comprises a front end sealing area (1), a front end transition area (2), a large diameter area (3), a rear end pressing area (4), a rear end arc transition area (5) and a rear end tubular transition area (6) which are arranged in sequence from the end.

2. The upset head type for high pressure sealing of pipes according to claim 1, characterized in that: The outer side surface of the front end sealing area (1) is spherical or conical; when the outer side surface of the front end sealing area (1) is spherical, the center of the sphere is located on the axis of the tube, and the intersection of the outer side surface of the front end sealing area (1) and the end surface is transitioned through a rounded corner or not through a rounded corner.

3. The upset head type for high pressure sealing of pipes according to claim 1, characterized in that: The outer side surface of the front end transition zone (2) is conical or arc-shaped; when the outer side surface of the front end transition zone (2) is conical, the transition angle of the cone is α, wherein α=30° to 120°.

4. The upset head type for high pressure sealing of pipes according to claim 3, characterized in that: When the outer side surfaces of the front end sealing area (1) and the front end transition area (2) are both arc-shaped, the outer side surface of the front end sealing area (1) and the outer side surface of the front end transition area (2) are the same arc section or different arc sections; when the outer side surface of the front end sealing area (1) and the outer side surface of the front end transition area (2) are conical, the outer side surface of the front end transition area (2) and the outer side surface of the front end sealing area (1) are the same cone section.

5. The upset head type for high pressure sealing of pipes according to claim 1, characterized in that: The outer diameter of the tube is defined as d1, and the outer diameter of the large diameter zone (3) is defined as d2, wherein d1<d2≤1.5*d1; the junction between the large diameter zone (3) and the front end transition zone (2) is either a smooth transition or a contraction transition, and the top edge and the bottom edge of the large diameter zone (3) are arc free transitions formed by upsetting.

6. The upset head type for high pressure sealing of pipes according to claim 5, characterized in that: When the junction between the large diameter area (3) and the front end transition area (2) is in a contraction transition, the junction between the large diameter area (3) and the front end transition area (2) is an arc transition of a set size.

7. The upset head type for high pressure sealing of pipes according to claim 1, characterized in that: The rear end clamping area (4) may be spherical, conical or planar. When the rear end clamping area (4) is spherical and the front end sealing area (1) is spherical, the center of the rear end clamping area (4) may or may not coincide with the center of the front end sealing area (1). When the rear end clamping area (4) is conical, its cone angle is defined as β, wherein β=60° to 150°.

8. The upset head type for high pressure sealing of pipes according to claim 1, characterized in that: The rear end circular arc transition zone (5) adopts a circular arc transition to the rear end tubular transition zone (6).

9. The upset head type for high pressure sealing of pipes according to claim 1, characterized in that: The rear end tubular transition zone (6) is a cone angle transition from top to bottom of 0° to 20°.

10. The upset head type for high pressure sealing of pipes according to claim 1, characterized in that: The length of the rear end tubular transition zone (6) is f, where f=(0.5-1.5)*d1.

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