Pipe fitting loading and unloading devices, straight pipe flange welding systems, and straight pipe flange welding methods

Abstract

This invention discloses a pipe fitting loading and unloading device, a straight pipe flange welding system, and a straight pipe flange welding method. The pipe fitting loading and unloading device includes a first support, a conveying rod movably connected to the first support, a placement platform located on one side of the conveying rod in a first direction, and a first driving component that drives the conveying rod to move up and down. The top of the conveying rod has a first surface extending along a second direction and inclined relative to a horizontal plane. The second direction is perpendicular to the first direction. The pipe fitting loading and unloading device also includes a blocking component disposed at the conveying rod and a second driving component that drives the blocking component to move so that the blocking component protrudes from the first surface in the vertical direction. This invention achieves the loading and unloading of straight pipe flanges by moving the position of the conveying rod and the blocking component, making the loading, unloading, and welding operations of straight pipe flanges simpler and more compact, reducing the welding time and control difficulty.

Description

Technical Field

[0001] This invention relates to the field of pipe welding, specifically to a pipe loading and unloading device, a straight pipe flange welding system, and a straight pipe flange welding method. Background Technology

[0002] When welding straight pipe flanges, the assembly is completed at the previous station first. Then, the straight pipe flange is transported to the welding device through the pipe fitting loading and unloading device for welding, and then unloaded after welding.

[0003] The existing straight pipe flange welding system uses a movable carrier to transport straight pipe flanges for loading and unloading. The specific process can be summarized as follows: the lifting mechanism on the carrier lifts the straight pipe flange located in the feeding area, and then drives the carrier carrying the straight pipe flange to move forward. When the straight pipe flange moves above the placement platform, the lifting mechanism falls, and the straight pipe flange lands on the placement platform for welding. After welding is completed, the lifting mechanism lifts the straight pipe flange again, and then drives the carrier carrying the straight pipe flange to move forward a certain distance to the unloading area, where the straight pipe flange is then lowered. The entire conveying process involves many actions and is relatively complex to control. Summary of the Invention

[0004] The purpose of this invention is to provide a pipe fitting loading and unloading device, a straight pipe flange welding system, and a straight pipe flange welding method, which makes the welding action of straight pipe flanges more compact and easier to control.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a pipe fitting loading and unloading device, comprising a first support, a conveying rod movably connected to the first support, a placement platform located on one side of the conveying rod in a first direction, and a first driving member for driving the conveying rod to move up and down. The top of the conveying rod has a first surface extending along a second direction and inclined relative to a horizontal plane. The second direction is perpendicular to the first direction. The pipe fitting loading and unloading device further comprises a blocking member disposed at the conveying rod and a second driving member for driving the blocking member to move so that the blocking member can protrude from the first surface in the vertical direction.

[0006] The conveying rod has a first end and a second end on both sides of its length direction. The first end is rotatably connected to the first support, and the first driving member drives the conveying rod to rotate so that the second end moves up and down.

[0007] When the second driving member drives the blocking member to protrude from the first surface in the vertical direction, the blocking member is used to prevent the tube from rolling on the first surface. When the second driving member drives the blocking member to retract to the lower side of the first surface, the tube can roll along the first surface.

[0008] As a further improvement of the present invention, the first support is provided with a receiving frame on one side of the conveying rod in the second direction, the receiving frame is provided near the higher end of the first surface, and the first end is rotatably connected to the receiving frame.

[0009] As a further improvement of the present invention, the portion of the top of the receiving rack near the conveying rod has a second surface that is inclined relative to the horizontal plane. The conveying rod has a first state in which the first surface and the second surface are in the same plane, and a second state in which the first surface and the second surface form an angle after the second end moves downward from the position of the first state.

[0010] As a further improvement of the present invention, the middle part of the blocking member is rotatably connected to the conveying rod, the second driving member is a telescopic driving member, and includes a second driving body rotatably connected to the conveying rod and a second telescopic part that telescopically extends relative to the second driving body, the head of the second telescopic part being rotatably connected to the lower part of the blocking member.

[0011] As a further improvement of the present invention, the placement platform includes a second support located on one side of the first support in a first direction, and two rollers connected above the second support and rotatably arranged about their own axes. The two rollers are spaced apart in a second direction and their axes are arranged in the first direction. An anti-slip wheel is also provided on the second support between the two rollers and rotatably arranged about its own axis. The axis of the anti-slip wheel is perpendicular to the axis of the two rollers.

[0012] As a further improvement of the present invention, the first support is provided with a discharge rack on the other side of the conveying rod in the second direction. The top of the discharge rack near the conveying rod has a third surface that is inclined relative to the horizontal plane. In the first state of the conveying rod, the third surface and the first surface are in the same plane.

[0013] The present invention also provides a straight pipe flange welding system, including a base, on both sides of the base along its length the aforementioned pipe loading and unloading devices are provided, and a welding device is provided on the base near the pipe loading and unloading devices.

[0014] The present invention also provides a method for welding straight pipe flanges, using the above-described straight pipe flange welding system, and including the following steps:

[0015] S1: The straight pipe flange is conveyed to the first surface of the top of the conveyor rod, which is inclined relative to the horizontal plane, so that the straight pipe flange rolls along the first surface;

[0016] S2: Make the blocking element protrude from the first surface so that the straight pipe flange stops rolling at a predetermined position;

[0017] S3: Drive the second end of the conveyor rod downwards so that the straight pipe flange falls onto the placement platform;

[0018] S4: Weld the weld seam located at the end of the straight pipe flange;

[0019] S5: After welding is completed, the second end of the drive conveyor rod moves upward to lift the straight pipe flange;

[0020] S6: Retract the blocking element to the underside of the first surface so that the straight pipe flange continues to roll along the first surface to the unloading position.

[0021] As a further improvement of the present invention, step S4 specifically includes the following steps:

[0022] S41: Use the first sensor to detect the weld location;

[0023] S42: Based on the detected weld location, drive the welding torch to move to the corresponding position;

[0024] S43: Drive the straight pipe flange on the placement platform to roll;

[0025] S44: Weld the weld seam using a welding torch. During the welding process, the first sensor scans the weld seam condition in real time and continuously adjusts the position of the welding torch according to the weld seam condition.

[0026] As a further improvement of the present invention, the following steps are also included between step S2 and step S3:

[0027] S21: Use the second sensor to detect the position of the straight pipe flange end face;

[0028] S22: Based on the detected position of the straight pipe flange end face, drive the placement platform to move to the corresponding position;

[0029] The following steps are also included between steps S3 and S4:

[0030] S31: Drive the welding device, including the welding torch and the first sensor, to move to the corresponding position;

[0031] S32: Use a pressure roller to press down on the straight pipe flange from above to prevent the straight pipe flange from moving axially.

[0032] The beneficial effects of this invention are:

[0033] The pipe fitting loading and unloading device, straight pipe flange welding system, and straight pipe flange welding method provided by the present invention realize the loading and unloading of straight pipe flanges by moving the position of the conveying rod and the blocking component, making the loading and unloading and welding of straight pipe flanges simpler and more compact, reducing the time and control difficulty of the welding operation. Attached Figure Description

[0034] Figure 1This is a front view schematic diagram of a portion of the straight pipe flange welding system provided by the present invention.

[0035] Figure 2 This is a side view of a portion of the straight pipe flange welding machine system provided by the present invention.

[0036] Figure 3 for Figure 1 A front view structural schematic diagram of the loading and unloading device for central pipe fittings;

[0037] Figure 4 for Figure 3 A partial structural schematic diagram of the loading and unloading device for central pipe fittings;

[0038] Figure 5 for Figure 1 Schematic diagram of the central placement platform;

[0039] Figure 6 for Figure 5 A schematic diagram of the structure from another angle;

[0040] Figure 7 for Figure 1 Schematic diagram of the welding device;

[0041] Figure 8 for Figure 1 A structural diagram of the right side of the middle section;

[0042] Figure 9 This is a structural schematic diagram of the straight pipe flange welding system provided by the present invention. Detailed Implementation

[0043] The present invention will now be described in detail with reference to the embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any modifications to the mechanism, method, or function made by those skilled in the art based on these embodiments are included within the scope of protection of the present invention.

[0044] The terms used herein, such as "up," "down," "left," "right," "front," and "back," indicating spatial relative position, are for illustrative purposes to describe the relationship of one feature relative to another, as shown in the accompanying drawings. It is understood that, depending on the product's placement, these terms may be intended to include different orientations besides those shown in the figures, and should not be construed as limiting the claims. Furthermore, the descriptive term "horizontal" used herein is not entirely equivalent to being perpendicular to the direction of gravity, and allows for a certain angle of inclination.

[0045] like Figure 1As shown, this embodiment provides a straight pipe flange welding system 100 for welding and fixing a straight pipe and a flange located at the end of the straight pipe to form a straight pipe flange 40. The straight pipe flange welding system 100 includes a base 20, and pipe fitting loading and unloading devices 10 are provided on both sides of the base 20 in the length direction. A welding device 30 is provided on the base 20 near the pipe fitting loading and unloading devices 10.

[0046] like Figure 2-5 As shown, the pipe fitting loading and unloading device 10 includes a first support 11, a conveying rod 12 movably connected to the first support 11, a placement platform 13 located on one side of the conveying rod 12 in a first direction, and a first driving member 14 for driving the conveying rod 12 to move up and down. The top of the conveying rod 12 has a first surface 121 extending along a second direction and inclined relative to the horizontal plane. The second direction is perpendicular to the first direction. The pipe fitting loading and unloading device 10... Figure 2 Taking the shown state as an example, the first direction is perpendicular to the paper, and the second direction is... Figure 2 The pipe fitting loading and unloading device 10 also includes a blocking member 15 disposed at the conveying rod 12 and a second driving member 16 that drives the blocking member 15 to move so that the blocking member 15 can protrude from the first surface 121 in the vertical direction.

[0047] In actual operation, the pipe can roll along the first surface 121. After rolling a certain distance, the pipe stops rolling by the blocking member 15 protruding from the first surface 121. Then, the first driving member 14 drives the conveying rod 12 to move downward, so that the pipe falls on the placement table 13, which is convenient for the welding device 30 to operate. After the welding device 30 finishes its operation, the first driving member 14 drives the conveying rod 12 to move upward, so that the pipe is removed from the placement table 13. Then, the second driving member 16 drives the blocking member 15 to retract, and the pipe can continue to roll along the first surface 121 to the unloading position.

[0048] Specifically, the conveying rod 12 has a first end and a second end on both sides along its length. The first end rotates on the first support 11, allowing the conveying rod 12 to rotate relative to the first support 11. The first driving member 14 drives the conveying rod 12 to rotate, causing the second end to move up and down. During the rotation of the conveying rod 12, it can drive the pipe located on its first surface 121 to move up and down, so that the pipe can fall onto the placement platform 13 and be lifted off the placement platform 13.

[0049] The first driving component 14 is preferably a telescopic driving component such as a cylinder, specifically including a first driving body and a first telescopic part that extends and retracts relative to the first driving body. The first driving body is rotatably connected to the first support 11, and the head of the first telescopic part is rotatably connected to the conveying rod 12. Thus, when the first telescopic part extends and retracts relative to the first driving body, it can drive the conveying rod 12 to rotate. The preferred position for the head of the first telescopic part to be rotatably connected to the conveying rod 12 is at the second end, which is a certain distance from the first end in the length direction of the conveying rod 12. Alternatively, the head of the first telescopic part may not be rotatably connected to the conveying rod 12, but instead abut against the conveying rod 12 from below. When extended, the second end moves upward, and when retracted, the second end moves downward under the weight of the conveying rod 12.

[0050] In other embodiments, the conveying rod 12 can also be slidably connected to the first support 11, and the first driving member 14 drives the conveying rod 12 to slide up and down. It is only necessary to ensure that the pipe can move up and down on the conveying rod 12.

[0051] The first support 11 is provided with a receiving rack 111 on one side of the conveying rod 12 in the second direction. The receiving rack 111 is used to receive the pipes conveyed to the pipe loading and unloading device 10. That is, the pipes are first conveyed to the receiving rack 111 and then rolled from the receiving rack 111 onto the first surface 121. Therefore, the receiving rack 111 is located near the higher end of the first surface 121, and the first end is rotatably connected to the receiving rack 111. In this way, it can be ensured that the pipes can smoothly roll from the receiving rack 111 onto the first surface 121.

[0052] Specifically, it can be set up as follows: a groove is provided on the top of the receiving rack 111, and part of the conveying rod 12 extends into the groove. The first end is rotatably connected to the two side walls of the groove through a rotating shaft.

[0053] Furthermore, the portion of the receiving rack 111 near the conveyor rod 12 has a second surface 112 inclined relative to the horizontal plane. The first surface 121 and the second surface 112 have the same inclination direction. The conveyor rod 12 has a first state in which the first surface 121 and the second surface 112 are in the same plane. In the first state, the pipe can smoothly roll from the second surface 112 to the first surface 121. The conveyor rod 12 also has a second state in which, after the second end moves downward from the position of the first state, an angle is formed between the first surface 121 and the second surface 112. During the transition from the first state to the second state, the pipe located on the first surface 121 can fall onto the placement table 13.

[0054] The middle part of the blocking member 15 is rotatably connected to the conveying rod 12. The second driving member 16 is a telescopic driving member, and includes a second driving body rotatably connected to the conveying rod 12 and a second telescopic part that telescopically extends relative to the second driving body. The head of the second telescopic part is rotatably connected to the lower part of the blocking member 15. In this way, the extension and retraction of the second telescopic part drives the blocking member 15 to rotate, so that a part of the upper side of the blocking member 15 protrudes from the first surface 121 to block the pipe. When blocking is not required, the blocking member 15 can also be rotated below the first surface 121.

[0055] The blocking member 15 can be disposed in a groove opened downward from the first surface 121 on the conveying rod 12, specifically including a first part and a second part that intersect to form an included angle, and a rotating part that is rotatably connected to the conveying rod 12 is formed between the first part and the second part. The first part serves as a part for blocking the tube, and the second part serves as a part that is rotatably connected to the head of the second telescopic part.

[0056] The first support 11 is provided with a discharge rack 113 on the other side of the conveying rod 12 in the second direction. The top of the discharge rack 113 near the conveying rod 12 has a third surface 114 that is inclined relative to the horizontal plane. When the conveying rod 12 is in the first state, the third surface 114 is in the same plane as the first surface 121. In this way, the pipe can smoothly roll from the first surface 121 to the third surface 114 for discharge.

[0057] Furthermore, the unloading rack 113 can be rotatably mounted on the first support 11, so that the unloading rack 113 can be folded or unfolded relative to the conveying rod 12. When the unloading rack 113 is unfolded, it can receive pipes from the conveying rod 12. When the unloading rack 113 is folded, the space left is available for personnel to pass through and perform related operations. The first support 11 can also be provided with a rotary drive component for driving the unloading rack 12.

[0058] like Figure 5-6 As shown, the placement platform 13 includes a second support 135 located on one side of the first support 11 in a first direction, and two rollers 131 connected above the second support 135 and rotatably arranged around their own axes. The two rollers 131 are spaced apart in a second direction, and their axes are arranged in the first direction. An anti-slip wheel 132 is also provided on the second support 135 between the two rollers 131, and is rotatably arranged around its own axis. The axis of the anti-slip wheel 132 is perpendicular to the axes of the two rollers 131. In actual operation, the two rollers 131 can be driven to rotate by a drive unit on the second support 135. The two rollers 131 drive the pipe placed between them to rotate through contact transmission, and can accommodate pipes of different diameters. The anti-slip wheel 132 is securely attached to the end of the pipe to prevent axial movement of the pipe, and the anti-slip wheel 132 can also rotate with the pipe.

[0059] Two rollers 131 are rotatably connected to a second support 135 via a rotating shaft. Carbon brushes that contact the rotating shaft are provided on the second support 135 so that the welding power source can be connected to the pipe through the rotating shaft.

[0060] As can be imagined, the pipe fitting loading and unloading device 10 can load and unload straight pipes and straight pipe flanges 40 connected to flanges on both sides, that is, the pipe fittings include straight pipes and straight pipe flanges 40.

[0061] like Figure 7 As shown, the welding device 30 includes a welding torch 32 and a first sensor 31 matched with the welding torch 32. In this embodiment, the welding is preferably performed on the inner and outer welds at the end of the straight pipe flange 40. Therefore, the welding torch 32 includes a first welding torch and a second welding torch for welding the inner and outer welds respectively. There are also two first sensors 31 corresponding to the first and second welding torches. The first and second welding torches are each connected to a servo carriage 33, and their displacement is driven by the servo carriage 33. The first sensor 31 is preferably a 3-laser sensor, which can effectively detect the inner and outer welds. The servo carriage 33 is preferably a three-axis servo carriage 33 to accurately control the displacement of the welding torch 32 in different directions.

[0062] like Figure 1 and 8 As shown, in the straight pipe flange welding system 100, the welding device 30 and the pipe fitting loading / unloading device 10 are slidably connected to the base 20 along its length. Specifically, it can be configured such that a first sliding plate that slides along the length of the base 20 is provided on the first side of the base 20, and the pipe fitting loading / unloading device 10 and the welding device 30 are mounted on the first sliding plate. Before welding, the first sliding plate is driven to slide to the corresponding position according to the length of the straight pipe flange 40 from the previous station. This allows the welding device 30 and the pipe fitting loading / unloading device 10, located on the first side of the base 20 along its length, to adjust their positions according to the length of the received straight pipe flange 40, thereby enabling the straight pipe flange welding system 100 to weld straight pipe flanges 40 of different lengths.

[0063] Furthermore, on the first side along the length of the base 20, a first support 11 is fixed to a first sliding plate, and a second sliding plate that slides along the length of the base 20 is provided on the first sliding plate. The placement platform 13 is fixed to the second sliding plate, and a third sliding plate that slides along the length of the base 20 is provided on the second sliding plate. The welding device 30 is fixed to the third sliding plate. In this way, the placement platform 13 and the welding device 30 can slide relative to the conveying rod 12, and the welding device 30 can slide relative to the placement platform 13.

[0064] On the second side of the base 20 along its length, the first support 11 is fixed to the base 20 and is provided with a fourth slide plate 21 that slides along the length of the base 20. The placement platform 13 is fixed to the fourth slide plate 21 and is provided with a fifth slide plate 22 that slides along the length of the base 20 on the fourth slide plate 21. The welding device 30 is fixed to the fifth slide plate 22, that is, on the second side of the base 20 along its length. Similarly, the placement platform 13 and the welding device 30 can slide relative to the conveying rod 12, and the welding device 30 can slide relative to the placement platform 13.

[0065] It should be noted that, Figure 8 The diagram shows the structure of the straight pipe flange welding system 100 located on the second side of the base 20 along its length; the structure on the first side of the base 20 along its length is similar. Figure 8 The fourth skateboard 21 is equivalent to the second skateboard on the first side, and the fifth skateboard 22 is equivalent to the third skateboard on the first side. There is one more first skateboard on the first side than on the second side in the length direction of the base 20.

[0066] For example Figure 5 and Figure 7 As shown, a second sensor 134 is provided on the second support 135 near the placement platform 13. The second sensor 134 is preferably a laser sensor to detect the end face position of the straight pipe flange 40, so that the placement platform 13 can be accurately moved to the bottom of the straight pipe flange 40. The welding device 30 is provided above the placement platform 13 with a sliding pressure roller 34. When the straight pipe flange 40 falls on the roller 131 of the placement platform 13, the straight pipe flange welding system 100 drives the third slide plate and the fifth slide plate 22 to slide, so that the welding device 30 located on both sides of the base 20 in the length direction moves. The pressure roller 34 moves accurately above the straight pipe flange 40 with the welding device 30 and presses the straight pipe flange 40 down to prevent the straight pipe flange 40 from radially running.

[0067] like Figure 9 As shown, in the straight pipe flange welding system 100, a feeding buffer rack 50 and a post-weld buffer rack 60 are respectively provided on both sides of the base 20 in the width direction to buffer the straight pipe flange 40 before and after welding. The straight pipe flange 40 is driven to roll on the feeding buffer rack 50 and the unloading buffer rack by a set material turning device. On the side of the post-weld buffer rack 60 away from the base 20, a logistics trolley 70 for receiving the straight pipe flange 40 and a guide rail 80 for the logistics trolley 70 to travel are also provided.

[0068] The present invention also provides a welding method for a straight pipe flange, comprising the following steps:

[0069] Preliminary steps: The straight pipe flange 40 is assembled on the assembly device. After assembly, the assembly device flips the straight pipe flange 40 onto the receiving rack 111. Under the action of inertia, the straight pipe flange 40 will roll on the receiving rack 111 toward the position of the conveyor rod 12.

[0070] S1: The straight pipe flange 40 is conveyed to the first surface 121, which is inclined relative to the horizontal plane at the top of the conveyor rod 12, so that the straight pipe flange 40 rolls along the first surface 121.

[0071] In step S1, the straight pipe flange 40 can be first conveyed to the feeding buffer rack 50, and then the material turning device on the feeding buffer rack 50 can convey the straight pipe flange 40 to the conveying rod 12.

[0072] S2: Make the blocking member 15 protrude from the first surface 121 so that the straight pipe flange 40 stops rolling at a predetermined position;

[0073] S3: Drive the conveyor rod 12 down so that the straight pipe flange 40 falls onto the placement platform 13;

[0074] The following steps are also included between steps S2 and S3:

[0075] S21: Use the second sensor 134 to detect the position of the end face of the straight pipe flange 40;

[0076] S22: Based on the detected end face position of the straight pipe flange 40, drive the placement platform 13 to move to the corresponding position;

[0077] Specifically, in step S22 above, the straight pipe flange welding system 100 drives the second slide plate and the fourth slide plate 21 to slide, so that the placement platform 13 located on both sides of the base 20 in the length direction moves to the corresponding position. When the placement platform 13 moves to the corresponding position, its two rollers 131 are located below the flange at the end of the straight pipe flange 40.

[0078] S4: Weld the weld seam located at the end of the straight pipe flange 40;

[0079] The following steps are also included between steps S3 and S4:

[0080] S31: Drive the welding device 30, which includes the welding torch 32 and the first sensor 31, to move to the corresponding position;

[0081] S32: Use pressure roller 34 to press down on the straight pipe flange 40 from above to prevent the straight pipe flange 40 from running in its radial direction.

[0082] Specifically, in steps S31 and S32 above, the straight pipe flange welding system 100 drives the third and fifth sliding plates 22 to slide, causing the welding devices 30 located on both sides of the base 20 along its length to move to corresponding positions. The pressure roller 34 can be mounted on the welding device 30, moving above the straight pipe flange 40 as the welding device 30 moves. The movement of the placement platform 13 and the welding device 30 allows the straight pipe flange welding system 100 to adapt to different positions of the straight pipe flange 40. Step S4 specifically includes the following steps:

[0083] S41: The weld location is detected using the first sensor 31;

[0084] S42: Based on the detected weld position, drive the welding torch 32 to move to the corresponding position;

[0085] S43: Drive the straight pipe flange 40 on the placement platform 13 to roll;

[0086] S44: Weld the weld seam using welding torch 32. During the welding process, the first sensor 31 scans the weld seam condition in real time and continuously adjusts the position of welding torch 32 according to the weld seam condition.

[0087] After welding is completed, step S45 may also be included: measuring the weld using the first sensor 31.

[0088] In steps S41 to S45 above, the first sensor 31 can automatically locate the weld seam and scan it in real time during the welding process, ensuring that the welding torch 32 welds in the correct position. The welding torch 32 may include a first welding torch and a second welding torch. Two first sensors 31 are provided corresponding to the first and second welding torches. The first and second welding torches, in conjunction with their corresponding first sensors, can respectively weld the inner and outer weld seams at the end of the straight pipe flange 40. After welding is completed, the first sensor 31 can also inspect the weld seam and determine the welding quality.

[0089] S5: After welding is completed, drive the conveyor rod 12 to rise to lift the straight pipe flange 40; in the above step S5, before driving the conveyor rod 12 to rise, it also includes the steps of lifting the pressure roller 34 and removing the welding device 30. After driving the conveyor rod 12 to rise and lift the straight pipe flange 40, it may also include the step of removing the placement table 13.

[0090] S6: Retract the blocking member 15 to the underside of the first surface 121 so that the straight pipe flange 40 continues to roll along the first surface 121 to the unloading position.

[0091] In steps S1 to S6 above, the straight flange 40 tends to roll along the first surface 121 of the conveyor rod 12 under the action of gravity. Midway through its rolling, the blocking member 15 stops the straight flange 40 at a predetermined position. Then, the conveyor rod 12 descends, and the straight flange 40 falls onto the placement table 13 for welding by the welding device 30. After welding is completed, the conveyor rod 12 is lifted, and the blocking member 15 is released, allowing the straight flange 40 to continue rolling along the first surface to the unloading position. The entire process does not require a drive device to drive the straight flange 40 to roll, making the loading and unloading of the straight flange 40 simple and compact.

[0092] In summary, the pipe fitting loading and unloading device 10, the straight pipe flange welding system 100, and the straight pipe flange welding method provided by the present invention realize the loading and unloading of the straight pipe flange 40 by moving the position of the conveying rod 12 and the blocking member 15, making the loading and unloading of the straight pipe flange 40 and the welding action simpler and more compact, reducing the time and control difficulty of the welding action.

[0093] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0094] The above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this application without departing from the spirit and scope of the technical solutions of this application.

Claims

1. A pipe feeding and unloading device, characterized by, The pipe feeding and discharging device comprises a first support, a conveying rod movably connected to the first support, a placing table located on one side of the conveying rod in a first direction, and a first driving member for driving the conveying rod to move up and down, wherein the top of the conveying rod is provided with a first surface extending in a second direction and inclined to a horizontal plane, and the second direction is perpendicular to the first direction, the pipe feeding and discharging device further comprises a blocking member arranged on the conveying rod and a second driving member for driving the blocking member to move so that the blocking member can protrude out of the first surface in the up and down direction. The conveying rod is provided with a first end and a second end on both sides in the length direction of the conveying rod, the first end is rotatably connected to the first support, and the first driving member drives the conveying rod to rotate so that the second end moves up and down. When the second driving member drives the blocking member to protrude out of the first surface in the up and down direction, the blocking member is used to block the pipe from rolling on the first surface, and when the second driving member drives the blocking member to retract below the first surface, the pipe can roll along the first surface. The placing table comprises a second support located on one side of the first support in the first direction, and two rollers rotatably arranged on the second support and having their own axes arranged in the first direction. The first support is provided with a receiving rack on one side of the conveying rod in the second direction, the receiving rack is arranged near the higher end of the first surface, and the first end is rotatably connected to the receiving rack. The part of the top of the receiving rack near the conveying rod is provided with a second surface inclined to the horizontal plane, and the conveying rod has a first state in which the first surface and the second surface are in the same plane, and a second state in which the second end moves downward from the position in the first state to form an included angle between the first surface and the second surface. The first support is provided with a discharging rack on the other side of the conveying rod in the second direction, and the part of the top of the discharging rack near the conveying rod is provided with a third surface inclined to the horizontal plane, and in the first state of the conveying rod, the third surface is in the same plane as the first surface.

2. The tube handling apparatus of claim 1, wherein, The middle part of the blocking member is rotatably connected to the conveying rod, the second driving member is a telescopic driving member, and comprises a second driving body rotatably connected to the conveying rod and a second telescopic part telescopically arranged relative to the second driving body, and the second telescopic part is rotatably connected to the lower part of the blocking member.

3. The tube handling apparatus of claim 1, wherein, The second support is further provided with an anti-wandering roller rotatably arranged between the two rollers, and the axis of the anti-wandering roller is perpendicular to the axes of the two rollers.

4. A straight pipe flange welding system characterized by, The base is provided with the pipe feeding and discharging device as claimed in any one of claims 1-3 on both sides in the length direction of the base, and the base is further provided with a welding device near the pipe feeding and discharging device.

5. A method of welding straight pipe flanges, characterized by, The straight pipe flange welding system as claimed in claim 4 is used, and comprises the following steps: S1: conveying the straight pipe flange to the first surface on the top of the conveying rod, so that the straight pipe flange rolls along the first surface; S2: protruding the blocking member out of the first surface to stop the straight pipe flange from rolling at a predetermined position. S3: drive the second end of the conveying rod to move downward, so that the straight pipe flange falls on the placing table; S4: weld the weld seam at the end of the straight pipe flange; S5: after the welding is completed, drive the second end of the conveying rod to move upward, so as to lift the straight pipe flange; S6: retract the blocking piece to the downside of the first surface, so as to make the straight pipe flange continue to roll along the first surface to the unloading position.

6. The straight pipe flange welding method according to claim 5, characterized by Step S4 specifically comprises the following steps: S41: detect the position of the weld seam by using the first sensor; S42: drive the welding gun to move to the corresponding position according to the detected position of the weld seam; S43: drive the straight pipe flange on the placing table to roll; S44: weld the weld seam by using the welding gun, and in the process of welding, the first sensor is used to scan the weld seam in real time and adjust the position of the welding gun according to the condition of the weld seam.

7. The straight pipe flange welding method according to claim 6, characterized by, Between step S2 and step S3, the following steps are further included: S21: detect the position of the end face of the straight pipe flange by using the second sensor; S22: drive the placing table to move to the corresponding position according to the detected position of the end face of the straight pipe flange; Between step S3 and step S4, the following steps are further included: S31: drive the welding device including the welding gun and the first sensor to move to the corresponding position; S32: press the straight pipe flange from above by using the press wheel to prevent the straight pipe flange from moving in the axial direction.

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