Positioning device suitable for welding flange and pipe fitting

Abstract

The invention belongs to the technical field of pipe fitting welding, and discloses a positioning device suitable for welding a flange and a pipe fitting, the positioning device comprises an annular shell, a plurality of column sleeves are fixedly mounted on the inner side of the annular shell, clamping rods are slidably connected to the middles of the column sleeves, and compression springs are fixedly connected between the clamping rods and the column sleeves; a plurality of inclined blocks connected end to end are slidably connected into the annular shell, a driving motor is fixedly connected to the bottom of the annular shell, a driving gear is fixedly connected to an output shaft of the driving motor, and a gear ring is meshed with the upper portion of the driving gear. A first straight gear rotates forwards or reversely, so that a toothed plate and a T-shaped plate are driven to slide centripetally or centrifugally until a flange is fixed by a plurality of fixing heads, gaps between a center hole of the flange and a curved surface of a pipe fitting are equal, deviation between a center shaft of the flange welded through an existing method and a center shaft of the pipe fitting is avoided, and the welding quality is improved. And the high-precision welding alignment requirement between the flange and the pipe fitting cannot be met.

Description

Technical Field

[0001] The invention belongs to the technical field of pipe fitting welding, and in particular relates to a positioning device suitable for welding flanges and pipe fittings. Background Art

[0002] The welding of flanges and pipe fittings is an important process in pipeline installation and maintenance, which involves connecting flanges to pipes or other pipe fittings. This connection method provides good sealing and mechanical strength and is suitable for various industrial applications. When welding the flange, it is necessary to align the center through hole of the flange with the pipe, so that the center lines of the pipe and the flange are on the same axis, and control the distance of the weld between the flange and the pipe to make the welding points of the pipe and the flange uniform.

[0003] In the existing welding process of flange and long pipe fittings, the flange is sleeved on the pipe fitting and then closely contacts the arc block adapted to the pipe fitting to complete the positioning. Since there is a margin between the center hole of the flange and the diameter of the pipe fitting, the center axis of the flange welded by the above method is prone to deviation from the center axis of the pipe fitting, which cannot meet the alignment requirements of high-precision welding of pipe fittings. Summary of the invention

[0004] The object of the present invention is to provide a positioning device suitable for welding flanges and pipe fittings to solve the problems raised in the above background technology.

[0005] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a positioning device suitable for welding flanges and pipe fittings, comprising an annular shell, a plurality of column sleeves are fixedly installed on the inner side of the annular shell, a clamping rod is slidably connected to the middle part of the column sleeve, a compression spring is fixedly connected between the clamping rod and the column sleeve, a plurality of inclined blocks connected end to end are slidably connected inside the annular shell, a driving motor is fixedly connected to the bottom of the annular shell, a driving gear is fixedly connected to the output shaft of the driving motor, a gear ring is meshed above the driving gear, a plurality of right gears are meshed on the inner side of the gear ring, a connecting rod is fixedly connected to the middle part of the right gear, a mounting shell is installed on the left part of the plurality of connecting rods, a left gear is fixedly connected to the left end of the connecting rod, a large gear is meshed on the inner side of the plurality of left gears, a clamping mechanism is arranged inside the mounting shell, and an alignment mechanism is slidably connected to the middle part of the plurality of connecting rods.

[0006] Preferably, the clamping mechanism includes a plurality of T-shaped plates, the inner end of the T-shaped plate is fixedly connected to a fixed head, the right side of the T-shaped plate is fixedly connected to a toothed plate, the right side of the toothed plate is meshed with a spur gear 1, the middle part of the spur gear 1 is fixedly connected to a fixed rod 1, one side of the spur gear 1 is provided with a bevel gear 1 fixedly connected to the fixed rod 1, the right side of the bevel gear 1 is meshed with a bevel gear 2, the middle part of the bevel gear 2 is fixedly connected to a fixed rod 2, and the right side of the bevel gear 2 is provided with a spur gear 2 fixedly connected to the fixed rod 2.

[0007] Preferably, the alignment mechanism includes a connecting ring, a plurality of cylinder sleeves are fixedly connected to the interior of the connecting ring, a T-shaped rod is slidably installed inside the cylinder sleeve, a return spring is fixedly connected between the T-shaped rod and the inner side of the cylinder sleeve, and a connecting pipe is connected between the plurality of cylinder sleeves.

[0008] Preferably, a through hole is opened in the middle of the inclined block, the through hole is adapted to the middle of the clamping rod, the end of the clamping rod contacts the outer curved surface of the inclined block, the ring gear is rotatably connected to the annular shell, the multiple connecting rods are rotatably connected to the annular shell, and the large gear is rotatably connected to the mounting shell.

[0009] Preferably, the fixed head is fixedly connected to the toothed plate, the T-shaped plate, the toothed plate and the mounting shell are slidably connected, the second fixed rod is rotatably connected to the mounting shell, and the second spur gear is meshed with the large gear.

[0010] Preferably, the connecting ring is slidably connected to the connecting rod, and two of the connecting pipes are provided with openings.

[0011] Preferably, a protrusion is provided in the middle of the left side of the fixing head, and both ends of the fixing rod are rotatably connected to fixing columns fixedly connected to the mounting shell.

[0012] The beneficial effects of the present invention are as follows:

[0013] 1. The present invention works by driving a motor to drive the driving gear to rotate, and the driving gear drives the gear ring to rotate, and the gear ring will drive the right gear to rotate, and the right gear drives the left gear to rotate through a connecting rod, and the left gear will drive multiple spur gears 2 to rotate, and the spur gear 2 drives the bevel gear 2 to rotate through the fixed rod 2, and the bevel gear 2 will drive the bevel gear 1 to rotate, and the bevel gear 1 drives the spur gear 1 to rotate through the fixed rod 1, and the spur gear 1 rotates forward or reversely, thereby driving the tooth plate and the T-shaped plate to slide centripetally or centrifugally until the flange is fixed by multiple fixed heads, which makes the gap between the center hole of the flange and the curved surface of the pipe fitting equal, thereby avoiding the problem that the central axis of the flange welded by the existing method is easy to have a deviation with the central axis of the pipe fitting, and the alignment requirement during high-precision welding of the pipe fitting cannot be met.

[0014] 2. The present invention supplies hydraulic oil to the interior of the connecting pipe and the cylinder sleeve so that the T-shaped rod moves centripetally and squeezes the reset spring. When the inner end of the T-shaped rod clamps the pipe fitting, the existing oil supply device stops supplying oil. Since multiple cylinder sleeves are in a connected state, the T-shaped rod is subjected to the same pressure, so that multiple connecting rods are parallel to the central axis of the pipe fitting, the side of the flange is perpendicular to the pipe fitting, and the central axis of the flange is further collinear with the central axis of the pipe fitting, thereby preventing one end of the connecting rod from deviating downward due to the dead weight of the flange. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the appearance structure of the present invention;

[0016] Figure 2 It is a schematic diagram of the alignment mechanism of the present invention;

[0017] Figure 3 This is a half-section schematic diagram of the inclined block of the present invention;

[0018] Figure 4 A half-section schematic diagram of a connecting ring of the present invention;

[0019] Figure 5 This is a schematic diagram of the internal structure of the installation shell of the present invention;

[0020] Figure 6 It is a schematic diagram of the separation of the clamping mechanism of the present invention.

[0021] In the figure: 1. annular shell; 2. column sleeve; 3. clamping rod; 4. compression spring; 5. inclined block; 6. driving motor; 7. driving gear; 8. gear ring; 9. right gear; 10. connecting rod; 11. mounting shell; 12. left gear; 13. large gear; 14. clamping mechanism; 141. T-shaped plate; 142. fixed head; 143. toothed plate; 144. spur gear 1; 145. fixing rod 1; 146. bevel gear 1; 147. bevel gear 2; 148. fixing rod 2; 149. spur gear 2; 15. alignment mechanism; 151. connecting ring; 152. cylinder sleeve; 153. T-shaped rod; 154. reset spring; 155. connecting pipe. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] like Figures 1 to 6As shown, an embodiment of the present invention provides a positioning device suitable for welding flanges and pipe fittings, including an annular shell 1, a plurality of column sleeves 2 are fixedly installed on the inner side of the annular shell 1, a clamping rod 3 is slidably connected to the middle of the column sleeve 2, a compression spring 4 is fixedly connected between the clamping rod 3 and the column sleeve 2, a plurality of inclined blocks 5 connected end to end are slidably connected inside the annular shell 1, a driving motor 6 is fixedly connected to the bottom of the annular shell 1, a driving gear 7 is fixedly connected to the output shaft of the driving motor 6, a gear ring 8 is meshed on the top of the driving gear 7, a plurality of right gears 9 are meshed on the inner side of the gear ring 8, a connecting rod 10 is fixedly connected to the middle of the right gear 9, and a mounting rod 10 is installed on the left side of the plurality of connecting rods 10. The housing 11 includes a left gear 12 fixedly connected to the left end of the connecting rod 10, a large gear 13 is meshed on the inner side of the plurality of left gears 12, a clamping mechanism 14 is arranged inside the mounting housing 11, an alignment mechanism 15 is slidably connected to the middle part of the plurality of connecting rods 10, the clamping mechanism 14 includes a plurality of T-shaped plates 141, a fixed head 142 is fixedly connected to the inner end of the T-shaped plate 141, a toothed plate 143 is fixedly connected to the right side of the T-shaped plate 141, a spur gear 144 is meshed on the right side of the toothed plate 143, a fixed rod 145 is fixedly connected to the middle part of the spur gear 144, and a bevel gear 145 fixedly connected to the fixed rod 145 is arranged on one side of the spur gear 144 6. The right side of the bevel gear 146 is meshed with a bevel gear 2 147, and the middle part of the bevel gear 2 147 is fixedly connected with a fixing rod 2 148. The right side of the bevel gear 2 147 is provided with a spur gear 2 149 fixedly connected with the fixing rod 2 148. Its function is that the present invention works by driving the driving motor 6 to drive the driving gear 7 to rotate, the driving gear 7 drives the gear ring 8 to rotate, the gear ring 8 will drive the right gear 9 to rotate, the right gear 9 drives the left gear 12 to rotate through the connecting rod 10, the left gear 12 will drive multiple spur gears 2 149 to rotate, the spur gear 2 149 drives the bevel gear 2 147 to rotate through the fixing rod 2 148, and the bevel gear 2 147 will drive the bevel gear 2 Gear 146 rotates, bevel gear 146 drives spur gear 144 to rotate through fixing rod 145, and spur gear 144 rotates forward or reversely, thereby driving tooth plate 143 and T-plate 141 to slide centripetally or centrifugally, and the diameter of the protrusion is smaller than the aperture of the hole on the flange, so that the fixing head 142 can clamp the flange by moving outward or inward until the flange is fixed by multiple fixing heads 142, which makes the gap between the center hole of the flange and the curved surface of the pipe equal, thereby avoiding the problem that the center axis of the flange welded by the existing method and the center axis of the pipe are prone to deviation and cannot meet the alignment requirements of high-precision welding of the pipe.

[0024] Among them, the alignment mechanism 15 includes a connecting ring 151, and a plurality of cylinder sleeves 152 are fixedly connected to the inside of the connecting ring 151, and a T-shaped rod 153 is slidably installed inside the cylinder sleeve 152. A reset spring 154 is fixedly connected between the T-shaped rod 153 and the inner side of the cylinder sleeve 152, and a connecting pipe 155 is connected between the plurality of cylinder sleeves 152. Its function is to supply hydraulic oil to the connecting pipe 155 and the inside of the cylinder sleeve 152, so that the T-shaped rod 153 will move centripetally and squeeze the reset spring 154. When the inner end of the T-shaped rod 153 clamps the pipe fitting, the existing oil supply device stops supplying oil. Since the plurality of cylinder sleeves 152 are in a connected state, the T-shaped rod 153 is subjected to the same pressure, so that the plurality of connecting rods 10 are parallel to the central axis of the pipe fitting, the side of the flange is perpendicular to the pipe fitting, and the central axis of the flange is further made to be collinear with the central axis of the pipe fitting, thereby preventing one end of the connecting rod 10 from deviating downward due to the dead weight of the flange.

[0025] Among them, a through hole is opened in the middle of the inclined block 5, the through hole is adapted to the middle of the clamping rod 3, the end of the clamping rod 3 contacts the outer curved surface of the inclined block 5, the gear ring 8 is rotatably connected to the ring shell 1, a plurality of connecting rods 10 are rotatably connected to the ring shell 1, the large gear 13 is rotatably connected to the mounting shell 11, the fixed head 142 is fixedly connected to the tooth plate 143, the T-shaped plate 141 and the tooth plate 143 are slidably connected to the mounting shell 11, the fixed rod 148 is rotatably connected to the mounting shell 11, the spur gear 149 is meshed with the large gear 13, the connecting ring 151 is slidably connected to the connecting rod 10, and the two connecting pipes 155 are provided with openings, A protrusion is provided in the middle of the left side of the fixed head 142, and the diameter of the protrusion is smaller than the aperture of the hole on the flange. The two ends of the fixing rod 145 are rotatably connected with fixing columns fixedly connected to the mounting shell 11. Its function is to rotate the multiple inclined blocks 5 to make them slide relative to the annular shell 1. The inclined blocks 5 will drive the clamping rod 3 to move outward and squeeze the compression spring 4. The distance between the inner ends of the multiple clamping rods 3 becomes larger, so that the device can be sleeved on the pipe fitting. Then, the inclined block 5 is no longer rotated, and the compression spring 4 will push the clamping rod 3 to move inward, so that the inclined block 5 will rotate in the opposite direction until the inner ends of the multiple clamping rods 3 clamp the pipe fitting.

[0026] Working principle:

[0027] Before using the present invention, the oil supply pipe and the oil return pipe of the oil supply device are connected to the opening of the connecting pipe 155, the cylinder sleeve 152 and the connecting pipe 155 are filled with a proper amount of hydraulic oil, and the return spring 154 is in the longest state;

[0028] When the present invention is used, the driving motor 6 works, driving the driving gear 7 to rotate, the driving gear 7 drives the gear ring 8 to rotate, the gear ring 8 will drive the right gear 9 to rotate, the right gear 9 drives the left gear 12 to rotate through the connecting rod 10, the left gear 12 will drive a plurality of spur gears 149 to rotate, the spur gear 149 drives the bevel gear 147 to rotate through the fixing rod 148, the bevel gear 147 will drive the bevel gear 1 146 to rotate, the bevel gear 1 146 drives the spur gear 1 144 to rotate through the fixing rod 145, and the spur gears 149 drive the bevel gear 1 147 to rotate. 144 rotates forward or reversely, thereby driving the tooth plate 143 and the T-shaped plate 141 to slide centrifugally or centrifugally. When the protrusions on the plurality of fixed heads 142 fit with the holes on the flange, the driving motor 6 stops working, and the flange to be welded is fixedly installed on the fixed head 142. At this time, the plane of the flange is completely in contact with the left side of the fixed head 142. Then the driving motor 6 continues to work, and the fixed head 142 slides centrifugally until the fixed head 142 cannot move, which makes the gap between the center hole of the flange and the curved surface of the pipe equal;

[0029] Subsequently, the multiple inclined blocks 5 are rotated to make them slide relative to the ring shell 1, and the inclined blocks 5 will drive the clamping rod 3 to move outward and squeeze the compression spring 4, so that the distance between the inner ends of the multiple clamping rods 3 becomes larger, so that the device can be sleeved on the pipe fitting, and then the inclined blocks 5 are no longer rotated, and the compression spring 4 will push the clamping rod 3 to move inward, so that the inclined blocks 5 will rotate in the opposite direction until the inner ends of the multiple clamping rods 3 clamp the pipe fitting. When the clamping rod 3 clamps the pipe fitting, the end of the pipe fitting that needs to be welded to the flange is aligned with the left side of the flange;

[0030] The sliding alignment mechanism 15 is moved to the left side of the mounting shell 11, the return oil pipe of the existing oil supply device is in a closed state, and the oil supply pipe is in an open state. The oil supply device supplies hydraulic oil to the connecting pipe 155 and the inside of the cylinder sleeve 152 through the oil supply pipe, so that the T-shaped rod 153 moves centripetally and squeezes the return spring 154. When the inner end of the T-shaped rod 153 clamps the pipe fitting, the existing oil supply device stops supplying oil. Since multiple cylinder sleeves 152 are in a connected state, the T-shaped rod 153 is subjected to the same pressure, so that the multiple connecting rods 10 are parallel to the central axis of the pipe fitting, and then the central axis of the flange is collinear with the central axis of the pipe fitting, and the right side of the flange is parallel to the side of one end of the pipe fitting, thereby completing the alignment before welding.

[0031] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A positioning device suitable for welding flanges and pipe fittings, comprising a ring shell (1), characterized in that: A plurality of column sleeves (2) are fixedly mounted on the inner side of the annular shell (1); a clamping rod (3) is slidably connected to the middle of the column sleeve (2); a compression spring (4) is fixedly connected between the clamping rod (3) and the column sleeve (2); a plurality of inclined blocks (5) connected end to end are slidably connected inside the annular shell (1); a driving motor (6) is fixedly connected to the bottom of the annular shell (1); a driving gear (7) is fixedly connected to the output shaft of the driving motor (6); a gear ring (8) is meshed above the driving gear (7); A plurality of right gears (9) are meshed on the inner side of the gear ring (8); a connecting rod (10) is fixedly connected to the middle part of the right gear (9); a mounting shell (11) is installed on the left part of the plurality of connecting rods (10); a left gear (12) is fixedly connected to the left end of the connecting rod (10); a large gear (13) is meshed on the inner side of the plurality of left gears (12); a clamping mechanism (14) is arranged inside the mounting shell (11); and an alignment mechanism (15) is slidably connected to the middle part of the plurality of connecting rods (10).

2. A positioning device suitable for welding flanges and pipe fittings according to claim 1, characterized in that: The clamping mechanism (14) comprises a plurality of T-shaped plates (141), the inner ends of the T-shaped plates (141) are fixedly connected to fixed heads (142), the right sides of the T-shaped plates (141) are fixedly connected to toothed plates (143), the right sides of the toothed plates (143) are meshed with spur gear one (144), the middle part of the spur gear one (144) is fixedly connected to a fixed rod one (145), one side of the spur gear one (144) is provided with a bevel gear one (146) fixedly connected to the fixed rod one (145), the right side of the bevel gear one (146) is meshed with a bevel gear two (147), the middle part of the bevel gear two (147) is fixedly connected to a fixed rod two (148), and the right side of the bevel gear two (147) is provided with a spur gear two (149) fixedly connected to the fixed rod two (148).

3. A positioning device suitable for welding flanges and pipe fittings according to claim 2, characterized in that: The alignment mechanism (15) comprises a connecting ring (151), a plurality of cylinder sleeves (152) are fixedly connected inside the connecting ring (151), a T-shaped rod (153) is slidably installed inside the cylinder sleeve (152), a return spring (154) is fixedly connected between the T-shaped rod (153) and the inner side of the cylinder sleeve (152), and a connecting pipe (155) is connected between the plurality of cylinder sleeves (152).

4. A positioning device suitable for welding flanges and pipe fittings according to claim 3, characterized in that: A through hole is provided in the middle of the inclined block (5), and the through hole is adapted to the middle of the clamping rod (3). The end of the clamping rod (3) contacts the outer curved surface of the inclined block (5). The gear ring (8) is rotatably connected to the annular shell (1). The plurality of connecting rods (10) are rotatably connected to the annular shell (1). The large gear (13) is rotatably connected to the mounting shell (11).

5. A positioning device suitable for welding flanges and pipe fittings according to claim 4, characterized in that: The fixed head (142) is fixedly connected to the toothed plate (143), the T-shaped plate (141), the toothed plate (143) are slidably connected to the mounting shell (11), the second fixed rod (148) is rotationally connected to the mounting shell (11), and the second spur gear (149) is meshed with the large gear (13).

6. A positioning device suitable for welding flanges and pipe fittings according to claim 5, characterized in that: The connecting ring (151) is slidably connected to the connecting rod (10), wherein two connecting tubes (155) are provided with openings.

7. A positioning device suitable for welding flanges and pipe fittings according to claim 6, characterized in that: A protrusion is provided at the middle of the left side of the fixing head (142), and both ends of the fixing rod 1 (145) are rotatably connected to fixing columns fixedly connected to the mounting shell (11).

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