CN102814831A - Stripping blade and stripping tool having same - Google Patents

Abstract

The present invention is a kind of stripping knife, and described stripping knife comprises a rotating knife seat and a plurality of stripping blades that are evenly distributed along the circumference of the rotating knife seat; The S-shaped blade formed by the tangential connection of the arc, the side of the second arc surface away from the first arc surface is tangentially connected to a plane; the first arc surface, the second arc surface and the plane are along the The lengths of the generatrices of each arc surface are the same; the inner concave surface of the first arc surface constitutes the rake face of the peeling blade, so as to ensure that the peeling blade has a positive cutting rake angle. When the peeling tool is used to peel off the outer anticorrosion layer of the pipeline, the anticorrosion layer can be cut at high speed instead of scraped, thereby greatly improving the stripping efficiency, shortening the repair time, and bringing economic benefits.

Description

Stripping blades and stripping knives

technical field

The invention relates to a device for stripping the outer anticorrosion layer of a pipeline, in particular to a stripping blade and a stripping tool for mechanized automatic cutting and stripping of the outer anticorrosion layer of a pipeline.

Background technique

In the accident repair process of natural gas pipelines, it is first necessary to remove the anti-corrosion layer from the welded parts of the pipelines, and the pipelines cannot be cut or welded until the pipe body is exposed. Therefore, the removal of the anti-corrosion layer at the pipe cutting or welding has become the primary problem affecting the construction progress.

Due to the good bonding performance of the anti-corrosion layer on the outer wall of the pipeline, the method of peeling off the anti-corrosion layer in construction operations is usually manual peeling, high-temperature heating, and crawler-type large-diameter pipeline outer anti-corrosion layer stripping machine to peel off the anti-corrosion layer. Among them, manual stripping is carried out by construction workers using a planer, that is, using a hammer to beat the plane to peel off the anti-corrosion layer. This method is laborious and time-consuming, and not only the stripping efficiency is low, but also the stripping effect is not good. However, the crawler-type large-diameter pipe external anti-corrosion layer stripping machine uses rolling brushes (dense steel wires) to peel off the anti-corrosion layer. The stripping efficiency of the steel brush is extremely low, takes up a lot of time, and seriously affects the efficiency of the emergency repair process.

Therefore, relying on many years of experience and practice in related industries, the inventor proposes a stripping blade and a stripping tool for mechanized automatic cutting and stripping of the outer anticorrosion layer of pipelines, so as to overcome the defects of the prior art.

Contents of the invention

The purpose of the present invention is to provide a stripping blade and a stripping cutter, which can perform high-speed cutting instead of scraping the anticorrosion layer when stripping the anticorrosion layer outside the pipeline, thereby greatly improving the stripping efficiency.

The object of the present invention is achieved in this way, a stripping blade, the stripping blade is an S-shaped blade formed by the tangential connection of the first arc surface and the second arc surface along two arcs, the second arc The side of the arc surface away from the first arc surface is tangentially connected to a plane; the first arc surface, the second arc surface and the plane have the same length along the generatrix direction of each arc surface; the first arc surface The inner concave surface of the stripping blade constitutes the rake face of the stripping blade to ensure that the stripping blade has a positive cutting rake angle.

In a preferred embodiment of the present invention, the generatrices of the first arc surface and the second arc surface are parallel to each other.

In a preferred embodiment of the present invention, on the first arc surface and the second arc surface, there are a plurality of slits perpendicular to the generatrix, and the slits run through the first arc surface and the second arc surface. The positive and negative surfaces of the two arc surfaces form comb-shaped blades which are juxtaposed by a plurality of strip-shaped blades.

In a preferred embodiment of the present invention, the plurality of slits extend to the side of the plane connected to the second arcuate surface.

In a preferred embodiment of the present invention, the stripping blade is made of titanium alloy material.

The object of the present invention can also be achieved in this way, a stripping tool, the stripping tool includes a rotating knife seat and a plurality of stripping blades uniformly distributed along the circumference of the rotating knife seat; the stripping blade is composed of the first arc surface and The S-shaped blade formed by the tangential connection of the second arc surface along the two arcs, the side of the second arc surface away from the first arc surface is tangentially connected to a plane; the first arc surface, the second arc surface The two arc surfaces and the plane have the same length along the generatrix direction of each arc surface; the inner concave surface of the first arc surface constitutes the rake face of the peeling blade, so as to ensure that the peeling blade has a positive cutting rake angle.

In a preferred embodiment of the present invention, the rotary knife seat is cylindrical, the planes of the stripping blades are fixed on the outer wall of the rotary knife seat, and the longitudinal direction of the plane is parallel to the axial direction of the rotary knife seat. set up.

In a preferred embodiment of the present invention, the outer wall of the rotary tool seat is evenly distributed with a plurality of installation grooves arranged in the axial direction, and the cross section of the installation grooves is in the shape of a right-angled trapezoid with a wide outside and a narrow inside; The plane of the peeling blade is attached to the right-angled side wall of the installation groove; the plane is squeezed and fixed by a bar-shaped pressing block whose cross section is also a right-angled trapezoid.

In a preferred embodiment of the present invention, the strip-shaped pressing block is fixed on the rotary knife seat by screws.

In a preferred embodiment of the present invention, the stripping blade is made of titanium alloy material.

From the above, when using the peeling tool provided by the present invention to peel off the anti-corrosion layer on the outside of the pipeline, because each stripping blade in the stripping tool has a positive rake angle, the peeling of the anti-corrosion layer is cutting rather than scraping, and then it can be greatly improved. Improve the stripping efficiency and shorten the maintenance and repair time to bring economic benefits. Further, since the stripping blade is made of titanium alloy material, it is wear-resistant and elastic; the stripping blade is in the shape of an S, and when it encounters the pipe body during the stripping process, a large cutting force is generated and the blade can automatically accommodate (in a larger reaction Under the action of force, the stripping blade will produce elastic deformation, and at the same time produce a radial tolerance deformation that moves to the direction of the center of rotation of the stripping tool, so that the blade can allow and retreat) to avoid damage to the pipeline body; at the same time, due to the formation of multiple equidistant strips The comb-like structure with parallel blades can allow the protruding weld seam of the pipe to recede when encountering the weld seam of the pipe. Therefore, the stripping tool can greatly improve the stripping efficiency and avoid damage to the pipe body.

Description of drawings

The following drawings are only intended to illustrate and explain the present invention schematically, and do not limit the scope of the present invention. in:

FIG. 1A is a schematic structural view of the stripping blade in the present invention.

Fig. 1B: is a schematic side view of Fig. 1A.

FIG. 1C is a schematic top view of FIG. 1A .

FIG. 1D is a partially enlarged schematic diagram of FIG. 1A .

Fig. 2: is the schematic structural diagram of the peeling tool in the present invention.

FIG. 3A is a schematic structural view of the rotary tool holder in the present invention.

Fig. 3B: is a schematic diagram of the cross-sectional structure of A-A in Fig. 3A.

Fig. 4 is a schematic view of the use state of the peeling tool of the present invention.

Figure 5: is an enlarged schematic view of the structure in Figure 4.

Fig. 6A: It is a structural schematic diagram of a bar-shaped briquetting block in the present invention.

FIG. 6B : is a schematic side view of the structure of FIG. 6A .

Detailed ways

In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described with reference to the accompanying drawings.

As shown in Figures 1A to 1D, the present invention proposes a peeling blade 1, which is an S-shaped blade formed by the tangential connection of a first arc surface 11 and a second arc surface 12 along two arcs. Blade, on the second arc surface 12, a side tangentially connected to a plane 13 away from the first arc surface 11, the plane 13 constitutes the clamping handle portion of the stripping blade 1; the first arc surface 11, The second arc surface 12 and the plane 13 have the same length along the generatrix direction of each arc surface; the inner concave surface of the first arc surface 11 constitutes the rake face 111 of the stripping blade; in the present embodiment, as shown in FIG. As shown in 1A, the rake face 111 is on the concave surface of the distal arc of the first arc surface 11 to ensure that the stripping blade 1 has a positive cutting rake angle. The generatrices of the first arc surface 11 and the second arc surface 12 are parallel to each other. In this embodiment, on the first arc surface 11 and the second arc surface 12, a plurality of equidistant slits 14 are arranged perpendicular to the generatrix, and the slits 14 run through the first arc surface. 11 and the front and back of the second arc surface 12 to form a comb-like blade that is juxtaposed by a plurality of equidistant bar-shaped blades 15. The stripping blade 1 is made of titanium alloy material.

In this embodiment, the plurality of slits 14 extend to the side of the plane 13 that is connected to the second arc surface 12, that is, the slits 14 are on the side between the clamping handle portion and the second arc surface 12. Stop at the tangent point, and the integral clamping handle portion without kerf ensures the stability of each strip blade 15 and the reliability of overall blade clamping.

As shown in FIG. 2 , the present invention also proposes a peeling tool 100 composed of the above-mentioned peeling blade 1, which includes a rotating knife seat 2 and a plurality of peeling blades 1 uniformly distributed along the circumference of the rotating knife seat 2. ; As shown in Fig. 2, Fig. 3A, Fig. 3B, described rotary knife seat 2 is cylindrical, and the plane 13 of each described stripping blade 1 is fixed on the outer wall circumferential direction of rotary knife seat 2, and the longitudinal direction of described plane 13 is in line with The axial direction of the rotary tool seat 2 is arranged in parallel. The rotary knife seat 2 is driven by a motor to rotate, thereby driving the stripping blade 1 to strip the anticorrosion layer on the outside of the pipeline.

As shown in Fig. 4 and Fig. 5, when using the peeling tool provided by the present invention to peel off the anticorrosion layer 6 outside the pipeline 5, since each stripping blade 1 in the stripping tool 100 has a positive rake angle γ ₀ , the peeling of the anticorrosion layer It is cutting instead of scraping, which can greatly improve the stripping efficiency and shorten the maintenance and repair time, so as to bring economic benefits. Further, since the stripping blade 1 is made of titanium alloy material, it has wear resistance and elasticity; the stripping blade 1 is in an S shape, and the blade can automatically accommodate after a large cutting force is generated when encountering the pipeline body in the stripping process (in a larger Under the action of the reaction force, the peeling blade will produce elastic deformation, and at the same time produce a radial tolerance deformation that moves to the direction of the center of rotation of the peeling tool, so that the blade can allow back) to avoid damage to the pipeline body; at the same time, due to the formation of multiple equidistant The comb-like structure of the bar-shaped blades 15 can allow the protruding weld seam of the pipeline to recede when encountering the weld seam of the pipeline. Therefore, the stripping tool can greatly improve the stripping efficiency and avoid damage to the pipeline body.

In this embodiment, the purpose of adopting a positive rake angle is to reduce the elastic deformation of the chip when it is cut off and the frictional resistance between the chip and the front surface when the chip flows out, thereby reducing the cutting force and cutting heat, making the cutting light and fast, and improving the cutting efficiency. efficiency.

Further, in this embodiment, as shown in Fig. 3A and Fig. 3B, the outer wall of the rotary tool seat 2 is evenly distributed with a plurality of installation grooves 21 arranged in the axial direction, and the cross section of the installation groove 21 is as wide as the outside. Inner narrow right-angled trapezoidal shape; the plane 13 of the stripping blade 1 is attached to the right-angled side wall of the installation groove 21; the strip-shaped pressing block 3 (as shown in Figure 6A and Figure 6B ) that is also in a right-angled trapezoidal cross section will The plane 13 is pressed and fixed. The bar-shaped pressing block 3 can be fixed on the rotary knife seat 2 by screws 4 .

The above descriptions are only illustrative specific implementations of the present invention, and are not intended to limit the scope of the present invention. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principle of the present invention shall fall within the protection scope of the present invention.

Claims (10)

1. peel off blade for one kind, it is characterized in that: the said blade of peeling off is the S shape blade that is connected and composed along the tangential of two circular arcs by first arc surface and second arc surface, and the side tangential away from first arc surface on said second arc surface connects a plane; Said first arc surface, second arc surface and plane are identical along the generatrix direction length of each arc surface; The inner concave of said first arc surface constitutes the said rake face of peeling off blade, to guarantee that peeling off blade has positive cutting anterior angle.

2. the blade of peeling off as claimed in claim 1 is characterized in that: the bus of said first arc surface and second arc surface is parallel to each other.

3. the blade of peeling off as claimed in claim 1; It is characterized in that: on said first arc surface and second arc surface; Be provided with many joint-cuttings with the bus vertical direction, said joint-cutting runs through the positive and negative of first arc surface and second arc surface, to constitute by a plurality of bar blades comb arranged side by side.

4. the blade of peeling off as claimed in claim 3 is characterized in that: said many joint-cuttings extend to a side that is connected with second arc surface on the said plane.

5. the blade of peeling off as claimed in claim 1 is characterized in that: the said blade of peeling off is processed by titanium alloy material.

6. peel off cutter for one kind, it is characterized in that: saidly peel off a plurality of blades of peeling off that cutter includes rotary knife base and circumferentially is uniformly distributed with along rotary knife base; The said blade of peeling off is the S shape blade that is connected and composed along the tangential of two circular arcs by first arc surface and second arc surface, and the side tangential away from first arc surface on said second arc surface connects a plane; Said first arc surface, second arc surface and plane are identical along the generatrix direction length of each arc surface; The inner concave of said first arc surface constitutes the said rake face of peeling off blade, to guarantee that peeling off blade has positive cutting anterior angle.

7. the cutter of peeling off as claimed in claim 6, it is characterized in that: said rotary knife base is cylindric, and the outer wall week that rotary knife base is fixed on said plane of respectively peeling off blade makes progress, the axially parallel setting of the vertical and rotary knife base on said plane.

8. the cutter of peeling off as claimed in claim 7 is characterized in that: the outer wall of said rotary knife base is evenly equipped with a plurality of mounting grooves that are axial setting, and the cross section of said mounting groove is right-angled trapezium shape wide outside and narrow inside; The said plane abutment of peeling off blade is sidewall in the right angle of mounting groove; Bar shaped briquetting by cross section is also at right angles trapezoidal is fixing with the extruding of said plane.

9. the cutter of peeling off as claimed in claim 8 is characterized in that: said bar shaped briquetting is fixed on the rotary knife base by screw.

10. the cutter of peeling off as claimed in claim 6 is characterized in that: the said blade of peeling off is processed by titanium alloy material.

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