CN201012440Y - Flexible positioning device for square tube welding - Google Patents

Abstract

The utility model discloses a square tube welding flexible positioning device. It contains a locking rod, which is formed by connecting four conical segments in the same direction and in a movable shape. The outer end of the first conical section is connected with a cylindrical section and is equipped with a lock nut. There is a concentric sleeve on the outside of the locking rod, and there are four through holes on the concentric sleeve corresponding to each tapered section. There are adjusting steel balls in the through holes, and the opposite sides of the adjusting steel ball are connected with the locking rod respectively. Corresponding tapered section on the upper and the inner surface of the locking plate butt. Four limit rings are screwed on the outside of the concentric sleeve. The inner and outer surfaces of the four limit rings are respectively circular and square, and they are respectively screwed on the upper side of each circle of the through hole of the concentric sleeve. There are axial grooves on the four sides of the limit ring, and locking plates are hinged on the four sides by means of the axial grooves and pin shafts. Using the utility model to weld the opposite pipe requires less labor and high work efficiency, and can improve the quality of the butt pipes.

Description

Flexible positioning device for square tube welding

technical field

The utility model relates to a positioning device. Specifically, it is a flexible positioning device for welding two sections of square tubes end-to-end.

Background technique

At present, the methods for welding the two sections of square pipe together end-to-end for positioning are all manual positioning methods, that is, the two sections of square pipe are manually fixed together on the outside of the pipeline and then welded. Although the manual positioning method can also be used to realize the positioning and docking of two sections of square pipes, it requires the help of multiple people to complete the positioning and fixing during welding. The concentricity of the butt pipes cannot be guaranteed, making the quality of the butt pipes poor.

Utility model content

The problem to be solved by the utility model is to provide a flexible positioning device for square pipe welding. Using this square tube welding positioning device to position two sections of square tubes can not only position accurately, ensure the concentricity of the butt pipes, improve the quality of the butt pipes, but also greatly improve work efficiency.

In order to solve the above problems, the utility model adopts the following technical solutions:

The utility model is characterized in that it contains a locking rod, which is formed by sequentially connecting the first to fourth four tapered sections in the same direction and in a movable shape. The outer end of the first tapered section, ie the small end, is connected with a cylindrical section, the cylindrical section is a stud, and the outer end of the cylindrical section is equipped with a locking nut. The outer end of the fourth tapered section, that is, the big end, has a circumferential boss. There is a concentric sleeve on the outside of the locking rod, and the two ends of the concentric sleeve respectively abut against the locking nut and the circumferential boss. The section of the concentric sleeve corresponding to each tapered section is provided with four through holes, and the four through holes are evenly distributed along the circumferential direction of the concentric sleeve. There is an adjusting steel ball in each through hole on the concentric sleeve, and the opposite side surfaces of the adjusting steel ball respectively offset the corresponding tapered section on the locking rod and the inner surface of the locking plate. There are threads on the outside of the concentric sleeve, and four limit rings are screwed on it. The inner and outer surfaces of the four limit rings are respectively circular and square, and they are respectively screwed on the through grooves of each circle of the concentric sleeve. side. There are axial grooves on the four sides of the limit ring, and corresponding pin holes are processed on the two side walls of the axial grooves. There are pin shafts in each pair of pin holes, and a locking plate is hinged on each pin shaft. . The diameters of the large ends of the first to fourth tapered sections are equal to the diameters of the inner circles of the concentric sleeves, and there is a sliding fit between them.

There are spherical holes in the centers of the big ends of the first and third tapered sections, and steel balls are arranged in the spherical holes, and the steel balls and the corresponding spherical holes are in a movable fit. A connecting rod is fixed on the steel ball, and the connecting rod protrudes outside the spherical hole. There are central screw holes on the small ends of the second and fourth spherical sections, and the steel ball connecting rods in the first and third spherical holes have external threads, and the two connecting rods are respectively screwed into the small ends of the second and fourth spherical sections in the center screw hole on the

Wherein, both the first and third tapered sections have an axial center hole, and the bottom of the axial center hole has a circumferential step. There is a limit block in the section of the axial center hole above the circumferential step, and there are external threads and internal threads in the section of the axial center hole on the outer circle of the limit block and the section above the circumferential step. The threads are screwed together. The spherical hole is opened at the center of the lower surface of the limiting block, and the diameter of its mouth is smaller than the diameter of the spherical hole.

Adopting the above scheme has the following advantages:

Because the locking rod of the flexible positioning device for welding square tubes of the present utility model is formed by four conical sections being connected in the same direction and movable. The outer end of the first tapered section, ie the small end, is connected with a cylindrical section, the cylindrical section is a stud, and the outer end of the cylindrical section is equipped with a locking nut. There is a concentric sleeve on the outside of the locking rod, and the two ends of the concentric sleeve respectively abut against the locking nut and the circumferential boss. The outer thread of the concentric sleeve is screwed with four limit rings. The inner and outer surfaces of the four limit rings are respectively circular and square, and they are respectively screwed on the upper side of each circle of the concentric sleeve. . There are axial grooves on the four sides of the limit ring, and corresponding pin holes are processed on the two side walls of the axial grooves. There are pin shafts in each pair of pin holes, and a locking plate is hinged on each pin shaft. . The diameters of the large ends of the first to fourth tapered sections are equal to the diameters of the inner circles of the concentric sleeves, and there is a sliding fit between them. The section of the concentric sleeve corresponding to each tapered section is provided with four through holes, and the four through holes are evenly distributed along the circumferential direction of the concentric sleeve. There are adjusting steel balls in each through groove on the concentric sleeve, and the opposite side surfaces of the adjusting steel balls respectively offset the corresponding tapered section on the locking rod and the inner surface of the locking plate. Using an adjusting rod composed of four conical sections in the same direction, and using adjusting steel balls of different diameters, positioning and fixing are realized inside the welded square pipe. Therefore, the continuous rotary welding of the square tube can be realized by using the rotary mechanism. The positioning and fixing can be completed without the help of others during welding, which not only enables single-person operation, requires less labor, and has high work efficiency, but also can accurately position and ensure the concentricity of the butt pipes, greatly improving the quality of the butt pipes.

And because the locking rod is connected in the same direction and in a movable shape by four tapered sections. When the two sections of steel pipe to be welded are bent or bent, under the action of the spherical hole and the steel ball, the locking rod composed of four tapered sections can be bent with the bending of the connected square pipe, thus realizing two Segments are concentric and precisely positioned for welded square tubes.

Description of drawings

Fig. 1 is a structural schematic diagram of a flexible positioning device for square tube welding of the present invention;

FIG. 2 is a schematic cross-sectional view along line A-A of FIG. 1 .

Detailed ways

As shown in Figures 1 and 2, the flexible positioning device for welding square pipes of the present invention includes a locking rod 6, which is composed of a first tapered section 2, a second tapered section 14, a third tapered section 16 and the fourth tapered section 18 are sequentially connected in the same direction and are movable. The centers of the large ends of the first conical section 2 and the third conical section 16 are all processed with spherical holes, and a steel ball 15 is installed in each spherical hole, and each steel ball 15 is movable with the corresponding spherical hole. Cooperate. A connecting rod 11 is fixed on the steel ball 15, and the connecting rod stretches out of the spherical hole. The second taper section 14 and the small end of the fourth taper section 18 are all processed with a central screw hole, and the steel ball connecting rod 11 in the spherical hole on the first taper section and the third taper section is all processed with an outer threaded hole. screw thread, two connecting rods 11 are respectively screwed into the central screw holes on the second tapered section 14 and the fourth tapered section 18 small ends. The outer end of the first tapered section 2 , namely the small end, is connected with a cylindrical section, which is a stud, and a locking nut 5 is provided at the outer end thereof. The outer end of the fourth tapered section 18 , that is, the big end, is processed with a circumferential boss 19 . The outer cover of locking rod 6 is provided with concentric sleeve 4, and the outer surface of concentric sleeve 4 is threaded, and an end close to the first tapered section 2 of locking rod 6 is screwed with release nut 7, and its two ends are respectively connected with locking nut 5 and The circumferential bosses 19 offset each other. The segment of the concentric sleeve 4 corresponding to each tapered segment is provided with four through holes 12 , and the four through holes are uniformly distributed along the circumferential direction of the concentric sleeve 4 . The outside of the concentric sleeve 4 is threaded, and four spacer rings 8 are screwed on it. The inner and outer surfaces of the four spacer rings are respectively circular and square, and they are respectively screwed on each of the concentric sleeves 4. Circle the upper side of the through hole 12. Axial grooves are processed on the four sides of the limit ring 8, pin holes are correspondingly processed on the two side walls of each axial groove, and a locking plate 10 is hinged through a pin shaft 9 in each pair of pin holes. . The diameters of the large ends of the first tapered section 2 , the second tapered section 14 , the third tapered section 16 and the fourth tapered section 18 are all equal to the diameter of the inner circle of the concentric sleeve 4 and there is a sliding fit between them. There is an adjusting steel ball 13 in each through hole 12 on the concentric sleeve 4, and the opposite side surfaces of the adjusting steel ball 13 are offset against a corresponding tapered section on the locking rod 6 and the inner surface of a locking plate 10 respectively.

For ease of assembly, an axial center hole is processed on the first tapered section 2 and the third tapered section 16, and the bottom of the axial center hole is processed with a circumferential step 17, and the axial center of the section above the circumferential step 17 A limit block 1 is arranged in the hole. Said limiting block 1 is cylindrical, and the outer circle and the axial central hole above the circumferential step 17 are respectively processed with external threads and internal threads, and the two are screwed together by means of the internal and external threads. Said spherical hole is opened at the center of the lower surface of the limiting block 1, and the diameter of its mouth is smaller than the diameter of the spherical hole.

When two sections of welded square tubes 3 need to be welded together end-to-end, as long as the two sections of welded square tubes 3 are set on the outside of the limit ring 8 and the locking plate 10, and the locking nut 5 is tightened, That is, the two sections of welded square tubes 3 can be axially aligned to realize the positioning and fixing of the two sections of welded square tubes 3 .

Claims (3)

1. The flexible positioning device for square pipe welding is characterized in that it includes a locking rod (6), and the locking rod is sequentially in the same direction and movable from the first to fourth tapered sections (2, 14, 16, 18). connected; the outer end of the first conical section (2), namely the small end, is connected with a cylindrical section, the cylindrical section is a stud, and its outer end is equipped with a lock nut (5); the fourth conical section (18) There is a circumferential boss (19) at the outer end of the big end; there is a concentric sleeve (4) on the outside of the locking rod (6), and the two ends of the concentric sleeve (4) are respectively connected with the locking nut (5) and the circumferential offset against the boss (19); the outer thread of the concentric sleeve (4) is screwed with four limit rings (8), and the inner and outer surfaces of the four limit rings are respectively circular and square, There are axial grooves on their four sides, and pin holes are correspondingly processed on the two side walls of the axial grooves. There are pin shafts (9) in each pair of pin holes, and each pin shaft (9) is hinged. There is a locking plate (10); the diameter of the large end of the first to fourth tapered sections (2, 14, 16, 18) is equal to the diameter of the inner circle of the concentric sleeve (4), and the two are in a sliding fit; Four through holes (12) are arranged on the corresponding concentric sleeve (4) of the two tapered sections, and the four through holes are uniformly distributed along the circumferential direction of the concentric sleeve (4); each through hole on the concentric sleeve (4) Adjusting steel balls (13) are all arranged in the hole (12), and the opposite side surfaces of adjusting steel balls (13) offset with the corresponding tapered section on the locking bar (6) and the inner surface of locking plate (10) respectively. 2. The flexible positioning device for square tube welding according to claim 1, characterized in that there are spherical holes in the center of the large end of the first tapered section (2) and the third tapered section (16), and there are spherical holes in the spherical holes. Steel ball (15), is active cooperation between steel ball (15) and corresponding spherical hole; Steel ball (15) is fixed with connecting rod (11), and connecting rod (11) stretches out outside spherical hole; The second There is a central screw hole on the small end of the conical section (14) and the fourth spherical section (18), and on the steel ball connecting rod (11) on the first conical section (2) and the third spherical section (16) All have external threads, and the two connecting rods are respectively screwed into the central screw holes on the small ends of the second tapered section (14) and the fourth tapered section (18). 3. The flexible positioning device for square tube welding according to claim 1, characterized in that the first tapered section (2) and the third tapered section (16) have an axial center hole, and the axial center hole There is a circumferential step (17) at the bottom; there is a limit block (1) in the axial center hole above the circumferential step (17), and a limit block (1) on the outer circle of the limit block (1) and on the circumferential step (17) There are external threads and internal threads in that section of the axial center hole respectively, and the two are screwed together by means of the internal and external threads; the spherical hole is opened in the center of the lower surface of the limiting block (1), and its mouth diameter is smaller than that of the spherical The diameter of the hole.

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