Stamping die for pipeline ring repair prefabricated part

Abstract

The utility model discloses a stamping die for a pipeline ring repair prefabricated part. The stamping die comprises a female die and a male die which are matched with each other, the female die comprises a semicircular inwards-concave forming face, and the inwards-concave forming face comprises a large-diameter semicircular inwards-concave face and small-diameter semicircular inwards-concave faces arranged at the two ends of the large-diameter semicircular inwards-concave face in the axial direction of the inwards-concave forming face. The male die comprises a semicircular outwards-protruding forming face, and the outwards-protruding forming face comprises a large-diameter semicircular outwards-protruding face and small-diameter semicircular outwards-protruding faces arranged at the two ends of the large-diameter semicircular outwards-protruding face in the axial direction of the outwards-protruding forming face. The semicircular inwards-concave forming face of the female die is matched with the semicircular outwards-convex forming face of the male die. The stamping die for the pipeline ring repair prefabricated part can be used for stamping the stainless steel semi-cylindrical pipeline ring repair prefabricated part, so that the preparation efficiency and the product quality of the pipeline ring repair prefabricated part are improved.

Description

Technical Field

[0001] The utility model relates to a stamping die for a pipe ring repair prefabricated part. Background Art

[0002] The water supply pipes in the secondary water supply pump house often adopt stainless steel pipes, and the connection of adjacent stainless steel pipes often adopts butt welding. Therefore, a circular butt weld will be formed at the butt joint of the stainless steel pipes. As the operation time of the pipes increases, corrosion and leakage often occur at the butt weld.

[0003] In order to repair the leakage at the butt weld of the pipe without stopping the water supply, it is necessary to prepare a stainless steel semi-cylindrical pipe ring repair prefabricated part, and two pipe ring repair prefabricated parts are spliced to form a sleeve that can completely wrap the circular butt weld of the pipe.

[0004] Specifically, the semi-cylindrical pipe ring repair prefabricated part includes along its axial direction: a large-diameter semi-ring part for splicing to form the large-diameter section of the sleeve, and small-diameter semi-ring parts axially extending from both ends of the large-diameter semi-ring part respectively for splicing to form the small-diameter section of the sleeve; and the small-diameter semi-ring parts at both ends of the large-diameter semi-ring part are symmetrically arranged; the axial cross-sectional shape of the large-diameter semi-ring part is arc-shaped (the axial cross-section is coplanar with the axis of the semi-cylindrical pipe ring repair prefabricated part), and the radial cross-sectional shape of the large-diameter semi-ring part is semi-circular (the radial cross-section is perpendicular to the axis of the semi-cylindrical pipe ring repair prefabricated part); the axial cross-sectional shape of the small-diameter semi-ring part is straight-bar-shaped (the axial cross-section is coplanar with the axis of the semi-cylinder), and the radial cross-sectional shape of the small-diameter semi-ring part is semi-circular (the radial cross-section is perpendicular to the axis of the semi-cylinder).

[0005] When corrosion and leakage occur at the circular butt weld of the pipe, two semi-cylindrical pipe ring repair prefabricated parts are spliced to form a sleeve sleeved at the butt weld of the pipe; specifically: the large-diameter semi-ring parts of the two pipe ring repair prefabricated parts are spliced to form the large-diameter section of the sleeve, and the large-diameter section of the sleeve covers the circular butt weld of the pipe (that is, the circular butt weld of the pipe is placed in the inner cavity of the large-diameter section of the sleeve); and the small-diameter semi-ring parts of the two pipe ring repair prefabricated parts are spliced to form the small-diameter section of the sleeve, and the small-diameter section of the sleeve is abutted against the outer wall of the pipe; then the small-diameter sections at both ends of the sleeve and the outer wall of the pipe are fixedly sealed by lap welding, and the two pipe ring repair prefabricated parts are fixedly sealed at the splicing position, and finally the circular butt weld of the pipe is enclosed in a sealed space.

[0006] In order to efficiently prepare the above-mentioned stainless steel semi-cylindrical pipe ring repair prefabricated part, it is necessary to design a stamping die that can stamp and process the above-mentioned pipe ring repair prefabricated part. Summary of the Invention

[0007] The utility model provides a stamping die for a pipe ring repair prefabricated part, which includes a female die and a male die that cooperate with each other;

[0008] The female die includes a semi-circular concave forming surface; the concave forming surface includes, along its axial direction: a large-diameter semi-circular concave surface for forming the large-diameter semi-ring part of the pipeline loop repair preform, and small-diameter semi-circular concave surfaces axially extending from both ends of the large-diameter semi-circular concave surface respectively and for forming the small-diameter semi-ring part of the pipeline loop repair preform;

[0009] The male die includes a semi-circular convex forming surface; the convex forming surface includes, along its axial direction: a large-diameter semi-circular convex surface for forming the large-diameter semi-ring part of the pipeline loop repair preform, and small-diameter semi-circular convex surfaces axially extending from both ends of the large-diameter semi-circular convex surface respectively and for forming the small-diameter semi-ring part of the pipeline loop repair preform;

[0010] The semi-circular concave forming surface of the female die and the semi-circular convex forming surface of the male die cooperate with each other to form a forming cavity for forming the pipeline loop repair preform.

[0011] Preferably, the axial cross-sectional shape of the large-diameter semi-circular concave surface is arc-shaped (the axial cross-section is coplanar with the axis of the semi-circular concave forming surface), and the radial cross-sectional shape of the large-diameter semi-circular concave surface is semi-circular (the radial cross-section is perpendicular to the axis of the semi-circular concave forming surface);

[0012] The axial cross-sectional shape of the large-diameter semi-circular convex surface is arc-shaped (the axial cross-section is coplanar with the axis of the semi-circular convex forming surface), and the radial cross-sectional shape of the large-diameter semi-circular convex surface is semi-circular (the radial cross-section is perpendicular to the axis of the semi-circular convex forming surface);

[0013] The large-diameter semi-circular concave surface of the semi-circular concave forming surface and the large-diameter semi-circular convex surface of the semi-circular convex forming surface cooperate with each other to form a forming cavity for forming the large-diameter semi-ring part of the pipeline loop repair preform.

[0014] Preferably, the axial cross-sectional shape of the small-diameter semi-circular concave surface is straight-bar-shaped (the axial cross-section is coplanar with the axis of the semi-circular concave forming surface), and the radial cross-sectional shape of the small-diameter semi-circular concave surface is semi-circular (the radial cross-section is perpendicular to the axis of the semi-circular concave forming surface);

[0015] The axial cross-sectional shape of the small-diameter semi-circular convex surface is straight-bar-shaped (the axial cross-section is coplanar with the axis of the semi-circular convex forming surface), and the radial cross-sectional shape of the small-diameter semi-circular convex surface is semi-circular (the radial cross-section is perpendicular to the axis of the semi-circular convex forming surface);

[0016] The small-diameter semi-circular concave surfaces at both ends of the large-diameter semi-circular concave surface and the small-diameter semi-circular convex surfaces at both ends of the large-diameter semi-circular convex surface correspond to each other and cooperate with each other to form a forming cavity for forming the small-diameter semi-ring part of the pipeline loop repair preform.

[0017] Preferably, the small-diameter semi-circular concave surfaces at both ends of the large-diameter semi-circular concave surface are symmetrically arranged.

[0018] Preferably, the small-diameter semi-cylindrical convex surfaces at both ends of the large-diameter semi-cylindrical convex surface are symmetrically arranged.

[0019] The advantages and beneficial effects of the present utility model are as follows: A stamping die for a pipe ring repair prefabricated part is provided, which can stamp and process a stainless steel semi-cylindrical pipe ring repair prefabricated part, thereby improving the preparation efficiency and product quality of the pipe ring repair prefabricated part. Description of the Drawings

[0020] Figure 1 is a schematic view of the stamping die;

[0021] Figure 2 is a schematic view of the female die;

[0022] Figure 3 is a schematic view of the male die. Detailed Embodiment

[0023] The following combines the drawings and embodiments to further describe the detailed embodiment of the present utility model. The following embodiments are only used to more clearly illustrate the technical solution of the present utility model, and cannot be used to limit the protection scope of the present utility model.

[0024] The technical solution specifically implemented by the present utility model is as follows:

[0025] As Figures 1 to 3 shown, a stamping die for a pipe ring repair prefabricated part includes a cooperating female die 1 and male die 2;

[0026] The female die 1 includes a semi-cylindrical concave forming surface 10; the concave forming surface 10 includes along its axial direction: a large-diameter semi-cylindrical concave surface 11 for forming the large-diameter semi-ring part of the pipe ring repair prefabricated part, and small-diameter semi-cylindrical concave surfaces 12 respectively axially extending from both ends of the large-diameter semi-cylindrical concave surface 11 and for forming the small-diameter semi-ring part of the pipe ring repair prefabricated part; the axial cross-sectional shape of the large-diameter semi-cylindrical concave surface 11 is circular (the axial cross-section is coplanar with the axis of the semi-cylindrical concave forming surface 10), and the radial cross-sectional shape of the large-diameter semi-cylindrical concave surface 11 is semi-circular (the radial cross-section is perpendicular to the axis of the semi-cylindrical concave forming surface 10); the axial cross-sectional shape of the small-diameter semi-cylindrical concave surface 12 is straight (the axial cross-section is coplanar with the axis of the semi-cylindrical concave forming surface 10), and the radial cross-sectional shape of the small-diameter semi-cylindrical concave surface 12 is semi-circular (the radial cross-section is perpendicular to the axis of the semi-cylindrical concave forming surface 10); the small-diameter semi-cylindrical concave surfaces 12 at both ends of the large-diameter semi-cylindrical concave surface 11 are symmetrically arranged;

[0027] The punch 2 includes a semi-circular outer convex forming surface 20; the outer convex forming surface 20 includes, along its axial direction: a large-diameter semi-circular outer convex surface 21 for forming the large-diameter semi-ring part of the pipe loop repair preform, and small-diameter semi-circular outer convex surfaces 22 respectively axially extending from both ends of the large-diameter semi-circular outer convex surface 21 and for forming the small-diameter semi-ring part of the pipe loop repair preform; the axial cross-sectional shape of the large-diameter semi-circular outer convex surface 21 is arc-shaped (the axial cross-section is coplanar with the axis of the semi-circular outer convex forming surface 20), and the radial cross-sectional shape of the large-diameter semi-circular outer convex surface 21 is semi-circular (the radial cross-section is perpendicular to the axis of the semi-circular outer convex forming surface 20); the axial cross-sectional shape of the small-diameter semi-circular outer convex surface 22 is straight-bar-shaped (the axial cross-section is coplanar with the axis of the semi-circular outer convex forming surface 20), and the radial cross-sectional shape of the small-diameter semi-circular outer convex surface 22 is semi-circular (the radial cross-section is perpendicular to the axis of the semi-circular outer convex forming surface 20); the small-diameter semi-circular outer convex surfaces 22 at both ends of the large-diameter semi-circular outer convex surface 21 are symmetrically arranged;

[0028] The semi-circular inner concave forming surface 10 of the die 1 and the semi-circular outer convex forming surface 20 of the punch 2 cooperate with each other to form a forming cavity for forming the pipe loop repair preform; the large-diameter semi-circular inner concave surface 11 of the semi-circular inner concave forming surface 10 and the large-diameter semi-circular outer convex surface 21 of the semi-circular outer convex forming surface 20 cooperate with each other to form a forming cavity for forming the large-diameter semi-ring part of the pipe loop repair preform; the small-diameter semi-circular inner concave surfaces 12 at both ends of the large-diameter semi-circular inner concave surface 11 and the small-diameter semi-circular outer convex surfaces 22 at both ends of the large-diameter semi-circular outer convex surface 21 correspond to each other and cooperate with each other to form a forming cavity for forming the small-diameter semi-ring part of the pipe loop repair preform.

[0029] The above is only the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A stamping die for a prefabricated pipe loop repair piece, characterized in that, It includes a female die and a male die that cooperate with each other; The female die includes a semi-circular concave forming surface; the concave forming surface includes, along its axial direction: a large-diameter semi-circular concave surface for forming the large-diameter semi-ring part of the pipeline ring repair prefabricated part, and small-diameter semi-circular concave surfaces that axially extend out from both ends of the large-diameter semi-circular concave surface respectively and are used for forming the small-diameter semi-ring part of the pipeline ring repair prefabricated part; The male die includes a semi-circular convex forming surface; the convex forming surface includes, along its axial direction: a large-diameter semi-circular convex surface for forming the large-diameter semi-ring part of the pipeline ring repair prefabricated part, and small-diameter semi-circular convex surfaces that axially extend out from both ends of the large-diameter semi-circular convex surface respectively and are used for forming the small-diameter semi-ring part of the pipeline ring repair prefabricated part; The semi-circular concave forming surface of the female die and the semi-circular convex forming surface of the male die cooperate with each other to form a forming cavity for forming the pipeline ring repair prefabricated part.

2. The stamping die for the pipe loop repair prefabricated part according to claim 1, characterized in that, The axial cross-sectional shape of the large-diameter semi-circular concave surface is arc-shaped, and the radial cross-sectional shape of the large-diameter semi-circular concave surface is semi-circular; The axial cross-sectional shape of the large-diameter semi-circular convex surface is arc-shaped, and the radial cross-sectional shape of the large-diameter semi-circular convex surface is semi-circular; The large-diameter semi-circular concave surface of the semi-circular concave forming surface and the large-diameter semi-circular convex surface of the semi-circular convex forming surface cooperate with each other to form a forming cavity for forming the large-diameter semi-ring part of the pipeline ring repair prefabricated part.

3. The stamping die for the pipe-ring repair prefabricated part according to claim 2, characterized in that, The axial cross-sectional shape of the small-diameter semi-circular concave surface is straight-bar-shaped, and the radial cross-sectional shape of the small-diameter semi-circular concave surface is semi-circular; The axial cross-sectional shape of the small-diameter semi-circular convex surface is straight-bar-shaped, and the radial cross-sectional shape of the small-diameter semi-circular convex surface is semi-circular; The small-diameter semi-circular concave surfaces at both ends of the large-diameter semi-circular concave surface and the small-diameter semi-circular convex surfaces at both ends of the large-diameter semi-circular convex surface correspond to each other one by one and cooperate with each other to form a forming cavity for forming the small-diameter semi-ring part of the pipeline ring repair prefabricated part.

4. The stamping die for the pipe ring repair prefabricated part according to claim 3, characterized in that, The small-diameter semi-circular concave surfaces at both ends of the large-diameter semi-circular concave surface are symmetrically arranged.

5. The stamping die for the pipe loop repair prefabricated part according to claim 4, characterized in that, The small-diameter semi-circular convex surfaces at both ends of the large-diameter semi-circular convex surface are symmetrically arranged.

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