A multi-point synchronous automatic welding equipment positioning device

Abstract

The present invention relates to the technical field of pipeline welding, and in particular to a multi-point synchronous automatic welding equipment positioning device, which is used to position the welding groove of the pipeline, and includes at least two telescopic components arranged in a ring shape and rollers arranged one by one with the telescopic components; at least two of the telescopic components are coaxially arranged on the welding gun fixing plate of the multi-point synchronous automatic welding equipment; the axial direction of the roller is parallel to the axial direction of the welding gun fixing plate, and the roller can roll on the outer circumferential surface of the pipeline; the telescopic component includes an outer cylinder, a gear rack mechanism and an elastic member fixedly connected to the outer cylinder at one end; the outer cylinder is fixedly connected to the welding gun fixing plate; the gear rack mechanism includes a meshing rack and a gear and a gear shaft. The present invention utilizes the scraping effect of the rack on the groove surface of the welding groove to remove impurities on the groove surface, improve the quality of welding, and ensure the connection strength of the weld.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline welding, in particular to a multi-point synchronous automatic welding equipment positioning device. Background Art

[0002] The multi-point synchronous automatic welding equipment includes multiple welding guns, all of which are fixed on the welding gun fixing plate and arranged in a circular shape. Each welding gun completes the welding work at a certain angle. The multi-point synchronous automatic welding equipment can improve production efficiency, realize continuous and efficient welding operations, reduce the need for manual intervention and adjustment, thereby greatly shortening the welding cycle and increasing the production capacity of the production line.

[0003] The multi-point synchronous automatic welding equipment positioning device is used to position the welding groove so that the welding gun can perform precise welding.

[0004] For example, the Chinese invention patent with the announcement number CN106862823B discloses a multi-point synchronous automatic welding equipment positioning device and its use method, which belongs to the technical field of pipeline welding equipment. The positioning device is coaxially fixed with the welding gun fixing plate of the multi-point synchronous automatic welding equipment, including: a positioning plate and multiple positioning mechanisms; the positioning plate is annular; multiple positioning mechanisms are fixed on the surface of the positioning plate and evenly distributed along the circumferential direction of the positioning plate; the positioning mechanism includes a fixed bracket, a connecting block, a connecting block driving component, and a probe component; the fixed bracket is fixedly connected to the surface of the positioning plate; the connecting block is hingedly connected to the fixed bracket, and the connecting block driving component is used to drive the connecting block to make a circular motion; the probe component includes a probe and an elastic connecting component; one end of the elastic connecting component is fixedly connected to the connecting block, and the other end is connected to the probe. The use of this positioning device can realize the initial positioning of the multi-point synchronous automatic welding equipment relative to the pipeline welding groove before the welding operation begins, and the positioning process is fast and accurate.

[0005] Combining the relevant technologies and the technical solutions provided by the above patents, it can be seen that the current positioning devices still have at least the following deficiencies when used:

[0006] During the positioning process, the current positioning device cannot remove impurities adhered to the welding groove (including impurities such as dust, and impurities such as protrusions formed after the sparks generated during the welding process cool down). These impurities will cause the connection strength of the weld to decrease, resulting in poor welding quality. Summary of the invention

[0007] The object of the present invention is to provide a multi-point synchronous automatic welding equipment positioning device to solve the problems raised in the above background technology.

[0008] To achieve the above object, the present invention provides the following technical solutions: a multi-point synchronous automatic welding equipment positioning device, used for positioning the welding groove of a pipeline, comprising at least two telescopic components arranged in a ring shape and rollers arranged in one-to-one correspondence with the telescopic components;

[0009] At least two of the telescopic components are coaxially arranged on a welding gun fixing plate of a multi-point synchronous automatic welding equipment;

[0010] The axial direction of the roller is parallel to the axial direction of the welding gun fixing plate, and the roller can roll on the outer peripheral surface of the pipe;

[0011] The telescopic component comprises an outer cylinder, a gear rack mechanism and an elastic member with one end fixedly connected to the outer cylinder;

[0012] The outer cylinder is fixedly connected to the welding gun fixing plate;

[0013] The rack and pinion mechanism comprises a rack and a gear and a gear shaft that are meshed and connected;

[0014] The rack is slidably connected to the inside of the outer tube, and the length direction and sliding direction of the rack are both perpendicular to the axial direction of the pipeline;

[0015] The gear is unidirectionally connected to the gear shaft, and when the elastic member pushes the rack to extend out from the inside of the outer cylinder, the gear shaft remains stationary;

[0016] The gear shaft is rotatably connected to the outer cylinder, and the roller is coaxially fixed to one end of the gear shaft;

[0017] The rack can be extended from the inside of the outer cylinder under the elastic force of the elastic member, and the rack can be gradually retracted into the outer cylinder under the rolling action of the roller;

[0018] The telescopic component further comprises a ratchet mechanism, and the ratchet mechanism is used to make the roller roll in one direction;

[0019] Scraping strips are attached and fixed to the two side surfaces of the rack and the gear end surface; a side surface of the scraping strip that is close to the groove surface and the end away from the outer cylinder is provided with an inclined surface;

[0020] The telescopic component further comprises a linear guide groove fixed inside the outer cylinder, and the rack is slidably connected to the linear guide groove;

[0021] The positioning device also includes a fixing frame, and the outer cylinder is fixedly connected to the welding gun fixing plate through the fixing frame;

[0022] The gear is connected to the gear shaft for unidirectional rotation via a one-way bearing.

[0023] Preferably, support platforms are fixed on both sides of the top of the rack;

[0024] A limiting block corresponding to the support platform is fixed on the inner wall surface of the outer cylinder;

[0025] The limit block is arranged on the moving track of the support platform;

[0026] When the rack is accommodated in the outer cylinder, the other end of the elastic member is pressed against the support platform.

[0027] Preferably, one end of the outer cylinder away from the pipeline is fixedly connected to a top plate, and one end of the elastic member is fixed to the top plate.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] The present invention uses the telescopic component to cooperate with the gear rack mechanism and the elastic component, so that on the one hand, the welding groove can be quickly and accurately positioned to improve the welding quality; on the other hand, with the rolling effect of the roller on the circumference of the pipeline, the rack can be slowly retracted into the inner part of the outer cylinder during the rotation welding of the welding gun. In this way, the scraping effect of the rack on the groove surface of the welding groove can remove impurities on the groove surface, further improving the welding quality and ensuring the connection strength of the weld. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0031] Figure 2 For the present invention Figure 1 A schematic diagram of the cross-sectional three-dimensional structure of the telescopic component;

[0032] Figure 3 For the present invention Figure 2 A schematic diagram of the structure viewed from above with the top plate omitted;

[0033] Figure 4 For the present invention Figure 2 A right view structural diagram of ;

[0034] Figure 5 For the present invention Figure 2 A schematic diagram of the front view structure of

[0035] Figure 6 It is a three-dimensional structural schematic diagram of the gear rack mechanism of the present invention;

[0036] Figure 7 It is a rear view structural schematic diagram of the gear rack mechanism of the present invention;

[0037] Figure 8 It is a left-side structural schematic diagram of the gear rack mechanism of the present invention;

[0038] Fig. 9 It is a schematic diagram of the overall three-dimensional structure of the present invention after the rack is extended;

[0039] Fig.10 For the present invention Fig. 9 A rear view structural diagram of ;

[0040] Fig.11 For the present invention Fig. 9 A schematic diagram of the cross-sectional three-dimensional structure of the telescopic component;

[0041] Fig.12 For the present invention Fig. 9 Schematic diagram of the left view structure.

[0042] In the figure: 1. welding groove; 2. telescopic component; 21. outer cylinder; 211. top plate; 212. limit block; 22. gear rack mechanism; 221. rack; 2211. support platform; 222. gear; 223. gear shaft; 224. linear guide groove; 225. elastic member; 226. ratchet mechanism; 227. one-way bearing; 228. scraper; 2281. inclined surface; 3. roller; 4. fixing frame; 5. welding gun. DETAILED DESCRIPTION

[0043] 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.

[0044] See also Figure 1-Figure 12 , the present invention provides a technical solution:

[0045] A multi-point synchronous automatic welding equipment positioning device is used to position the welding groove 1 of the pipeline. Specifically, the multi-point synchronous automatic welding equipment has multiple welding guns 5, all of which are fixed on a welding gun fixing plate (not shown in the figure) and arranged in a circular shape, and each welding gun 5 completes welding work at a certain angle; its actual welding process is: the welding gun fixing plate is sleeved to the outside of the pipeline and is coaxial with the pipeline, and then the welding gun fixing plate is driven to gradually move toward the welding groove 1 along the axial direction of the pipeline until the welding end of each welding gun 5 is aligned with the welding groove 1, and then each welding gun 5 is driven to rotate around the axis of the pipeline, and the welding groove 1 is welded during the rotation of the welding gun 5. The positioning device in this embodiment is used to achieve precise positioning between the welding gun 5 and the welding groove 1.

[0046] The positioning device in this embodiment includes at least two telescopic components 2 arranged in a ring shape and rollers 3 arranged one by one with the telescopic components 2; Figure 1 The figure shows a schematic diagram of the structure of the telescopic component 2 in a contracted state. At this time, the welding gun fixing plate is used to drive the telescopic component 2 to move toward the welding groove 1. When the telescopic component 2 moves to the welding groove 1, the telescopic component 2 will be transformed from the contracted state to the extended state (such as Fig. 9 As shown), when the telescopic part 2 is in the extended state, it indicates that the positioning is completed.

[0047] like Figure 1 and Fig. 9 As shown, at least two telescopic components 2 are coaxially arranged on the welding gun fixing plate of the multi-point synchronous automatic welding equipment; in this embodiment, for the convenience of explanation, the number of telescopic components 2 and rollers 3 is limited to three.

[0048] like Figure 1 As shown, the axial direction of the roller 3 is parallel to the axial direction of the welding gun fixing plate, and the roller 3 can roll on the outer circumference of the pipe.

[0049] like Figure 1-Figure 8 As shown, the telescopic component 2 includes an outer cylinder 21, a gear rack mechanism 22 and an elastic member 225 with one end fixedly connected to the outer cylinder 21; the outer cylinder 21 is in a square cylinder shape and can be made of metal (such as aluminum alloy); the elastic member 225 can be a straight spring.

[0050] The outer cylinder 21 is fixedly connected to the welding gun fixing plate; specifically, in this embodiment, the outer cylinder 21 is fixedly connected to the welding gun fixing plate through the fixing frame 4.

[0051] like Figure 2-Figure 8 As shown, the rack and pinion mechanism 22 includes a meshing rack 221 and a gear 222 and a gear shaft 223; the rack 221 is slidably connected to the inside of the outer cylinder 21, and the length direction and sliding direction of the rack 221 are perpendicular to the axial direction of the pipeline; in this embodiment, the telescopic component 2 also includes a linear guide groove 224 fixed to the inside of the outer cylinder 21, and the rack 221 is slidably connected to the linear guide groove 224. Two linear guide grooves 224 are provided, which are respectively arranged on both sides of the rack 221, and a groove structure for the rack 221 to slide is formed between the two linear guide grooves 224.

[0052] like Figure 2-Figure 8 As shown, the gear 222 is connected to the gear shaft 223 for unidirectional rotation. In this embodiment, the gear 222 is connected to the gear shaft 223 for unidirectional rotation via a one-way bearing 227. When the elastic member 225 pushes the rack 221 to extend from the inside of the outer tube 21, the gear shaft 223 remains stationary; that is, during the process of the telescopic component 2 being transformed from a contracted state to an extended state, the gear shaft 223 does not rotate.

[0053] The gear shaft 223 is rotationally connected to the outer cylinder 21, and the roller 3 is coaxially fixed to one end of the gear shaft 223; therefore, during the process of the telescopic component 2 being transformed from the contracted state to the extended state, since the gear shaft 223 does not rotate, the roller 3 does not rotate either.

[0054] The rack 221 can be extended from the inner part of the outer tube 21 under the elastic force of the elastic member 225 , and the rack 221 can be gradually retracted into the outer tube 21 under the rolling action of the roller 3 .

[0055] In actual use, the three telescopic components 2 are fixedly connected to the welding gun fixing plate through the fixing frame 4. At this time, the telescopic components 2 are in the following Figure 1 The telescopic components 2 are in the contracted state shown in the figure, and then the three telescopic components 2 are pushed to move toward the direction of the welding groove 1. During this process, the telescopic components 2 always remain in the contracted state, and similarly, the elastic member 225 also remains in the contracted state; when the telescopic components 2 move to align with the welding groove 1, the elastic force accumulated on the elastic member 225 will act on the rack 221, thereby pushing the rack 221 to gradually extend from the inside of the outer cylinder 21, that is, the telescopic components 2 are transformed from the contracted state to the extended state, which is seen from the figure. Figure 1 Convert to Fig. 9 The positioning device completes the positioning process, and then the welding gun fixing plate can be driven to rotate, so that the welding groove 1 is welded by the welding gun 5. In this embodiment, the telescopic component 2 should be arranged on the rotation path of the welding gun 5, such as Fig.12 As shown, the rotation direction of the welding gun fixing plate in this embodiment is as follows Fig.12 As shown by the arrow in (clockwise rotation), the telescopic part 2 and the welding gun 5 should be aligned as follows Fig.12As shown; during the rotation of the welding gun fixing disk, since the outer cylinder 21 is fixedly connected to the welding gun fixing disk through the fixing frame 4, the telescopic component 2 will also rotate with the welding gun fixing disk; specifically, in the initial stage of the rotation of the welding gun fixing disk, for example, when the rotation angle of the welding gun fixing disk is within 20° (this angle can be adjusted according to the actual situation, and its purpose is that the rack 221 can rub and clean the groove surface of the welding groove 1 to be welded to remove impurities adhering to the groove surface), the welding gun 5 does not perform welding operations on the welding groove 1. During this process, the rack 221 can wipe off impurities on the groove surface; so that the welding gun 5 can perform welding operations on the wiped welding groove 1, thereby improving the quality of welding. Furthermore, when the welding gun fixing disk starts to rotate, the rack 221 will not only rotate together, but will also gradually shrink back into the interior of the outer cylinder 21, and completely withdraw from the interior of the welding groove 1 before the two adjacent welds are connected, so that the two adjacent welds can be connected. (Take three welding guns 5 as an example. During welding, the three welding guns 5 weld synchronously to produce three welds. As the welding guns 5 rotate, the distance between two adjacent welds gradually decreases, and the connection is finally completed). The principle of the rack 221 gradually retracting into the outer cylinder 21 is as follows: as the welding gun fixing plate rotates, the roller 3 contacts the outer surface of the pipe, so the roller 3 starts to rotate due to friction, thereby driving the gear shaft 223 to rotate, so that the gear 222 starts to rotate, thereby driving the rack 221 to gradually retract into the outer cylinder 21, so that the groove surface of the welding groove 1 can be completely scraped and impurities on the groove surface can be removed (including impurities such as dust and impurities generated after the welding sparks cool down); in actual operation, the length of the rack 221 inserted into the welding groove 1 and the circumference of the outer surface of the roller 3 can be adjusted according to the actual situation, so that the rack 221 can be completely withdrawn from the welding groove 1 after the roller 3 rotates a predetermined number of times.

[0056] The present invention, by setting up the telescopic component 2, utilizes the cooperation between the gear rack mechanism 22 and the elastic member 225, on the one hand, can realize the fast and accurate positioning of the welding groove 1, and improve the welding quality; on the other hand, cooperate with the rolling effect of the roller 3 on the circumference of the pipeline, can slowly retract the rack 221 into the inner part of the outer tube 21 during the rotation welding of the welding gun 5, so that the impurities on the groove surface of the welding groove 1 can be removed by the scraping effect of the rack 221, further improve the welding quality, and ensure the connection strength of the weld.

[0057] like Figure 1-Figure 12As shown, support platforms 2211 are fixed on both sides of the top of the rack 221; the support platforms 2211 are used to support the elastic member 225; a limit block 212 corresponding to the support platform 2211 is fixed on the inner wall surface of the outer cylinder 21; the limit block 212 is set on the moving track of the support platform 2211; when the rack 221 is received inside the outer cylinder 21, the other end of the elastic member 225 is pressed against the support platform 2211.

[0058] The process of converting the telescopic component 2 from the contracted state to the extended state is specifically as follows: the top end of the rack 221 is pushed and extended out of the outer tube 21 under the elastic support of the contracted elastic member 225. When the support platform 2211 is separated from the elastic member 225, the rack 221 will continue to extend out of the outer tube 21 under the action of inertia until the support platform 2211 contacts the limit block 212, and then the rack 221 will stop. At this time, since the gear 222 is connected to the gear shaft 223 for unidirectional rotation, when the elastic member 225 pushes the rack 221 to extend out from the inside of the outer tube 21, the gear shaft 223 remains stationary, and at this time there is friction between the roller 3 and the outer surface of the pipe, so the rack 221 will not rebound; in actual use, the length of the elastic member 225 can also be adjusted according to actual conditions.

[0059] like Figure 3 and Figure 4 As shown, the telescopic component 2 also includes a ratchet mechanism 226, which is used to make the roller 3 roll in one direction. Specifically, the ratchet of the ratchet mechanism 226 is coaxially fixed on the gear shaft 223, and the ratchet teeth of the ratchet mechanism 226 are hinged on the outer cylinder 21. The purpose of the ratchet mechanism 226 is to prevent the roller 3 from rotating in the opposite direction.

[0060] like Figure 1-Figure 12 As shown, scraper strips 228 are pasted and fixed on the two side surfaces parallel to the end surfaces of the rack 221 and the gear 222. The scraper strip 228 can be a rough-surfaced strip, such as a rough-surfaced metal strip, or an elastic sponge strip; in this way, in the process of the rack 221 gradually retracting into the outer cylinder 21, the effect of scraping off impurities can be improved, and at the same time, it can also ensure that the scraper strip 228 and the groove surface maintain stable contact, achieve comprehensive and thorough scraping of the groove surface, and ensure that welding operations can be carried out in every place while ensuring cleanliness; the scraper strip 228 is close to the side surface of the groove surface and is provided with a bevel 2281 at one end away from the outer cylinder 21, and the bevel 2281 is used to facilitate the smooth insertion of the scraper strip 228 into the welding groove 1.

[0061] In this embodiment, the sum of the thicknesses of the rack 221 and the two scrapers 228 should correspond to the reserved gap between the two welding grooves during actual welding. Specifically, before welding, the reserved gap between the two welding grooves is 2-4 mm, so the sum of the thicknesses of the rack 221 and the two scrapers 228 should be between 2-4 mm. When the scraper 228 is a sponge strip, the thickness of the sponge strip can be appropriately adjusted as long as the thickness of the sponge strip after extrusion and the rack 221 meet the actual needs.

[0062] like Figure 1-Figure 12 As shown, one end of the outer cylinder 21 away from the pipeline is fixedly connected to the top plate 211 , and one end of the elastic member 225 is fixed on the top plate 211 .

[0063] 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 multi-point synchronous automatic welding equipment positioning device, used for positioning the welding groove of a pipeline, characterized in that: It comprises at least two telescopic parts arranged in a ring shape and rollers arranged in one-to-one correspondence with the telescopic parts; At least two of the telescopic components are coaxially arranged on a welding gun fixing plate of a multi-point synchronous automatic welding equipment; The axial direction of the roller is parallel to the axial direction of the welding gun fixing plate, and the roller can roll on the outer peripheral surface of the pipe; The telescopic component comprises an outer cylinder, a gear rack mechanism and an elastic member with one end fixedly connected to the outer cylinder; The outer cylinder is fixedly connected to the welding gun fixing plate; The rack and pinion mechanism comprises a rack and a gear and a gear shaft that are meshed and connected; The rack is slidably connected to the inside of the outer tube, and the length direction and sliding direction of the rack are both perpendicular to the axial direction of the pipeline; The gear is unidirectionally connected to the gear shaft, and when the elastic member pushes the rack to extend out from the inside of the outer cylinder, the gear shaft remains stationary; The gear shaft is rotatably connected to the outer cylinder, and the roller is coaxially fixed to one end of the gear shaft; The rack can be extended from the inside of the outer cylinder under the elastic force of the elastic member, and the rack can be gradually retracted into the outer cylinder under the rolling action of the roller; The telescopic component further comprises a ratchet mechanism, and the ratchet mechanism is used to make the roller roll in one direction; Scraping strips are attached and fixed to the two side surfaces of the rack and the gear end surface; a side surface of the scraping strip that is close to the groove surface and the end away from the outer cylinder is provided with an inclined surface; The telescopic component further comprises a linear guide groove fixed inside the outer cylinder, and the rack is slidably connected to the linear guide groove; The positioning device also includes a fixing frame, and the outer cylinder is fixedly connected to the welding gun fixing plate through the fixing frame; The gear is connected to the gear shaft for unidirectional rotation via a one-way bearing.

2. A multi-point synchronous automatic welding equipment positioning device according to claim 1, characterized in that: Support platforms are fixed on both sides of the top of the rack; A limiting block corresponding to the support platform is fixed on the inner wall surface of the outer cylinder; The limit block is arranged on the moving track of the support platform; When the rack is accommodated in the outer cylinder, the other end of the elastic member is pressed against the support platform.

3. A multi-point synchronous automatic welding equipment positioning device according to claim 1, characterized in that: One end of the outer cylinder away from the pipeline is fixedly connected to a top plate, and one end of the elastic member is fixed to the top plate.

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