Welding device for oil casing

Abstract

The invention relates to the technical field of submerged arc welding machines, in particular to a welding device for a petroleum casing pipe. The device comprises a welding frame, a material storage box is arranged at the top of the welding frame, the bottom of the material storage box is connected with a material conveying pipe, a separation assembly is arranged in the material storage box, the separation assembly comprises a separation plate, a plurality of stirring assemblies are arranged in the position, below the separation plate, in the material storage box, and a dredging assembly is arranged in the material conveying pipe; in the rotating process of the rotating roller, the stirring arms continuously penetrate through the grating, the welding flux on the top of the partition plate is stirred to the two sides through the stirring arms on the stirring arms, and therefore the situation that the welding flux penetrates through the grating and then gathers at a pipe opening of the conveying pipe to cause blockage is prevented. And when the shifting arm leaves the position near the baffle, the baffle is reset under the action of the restoring force of the second spring, so that the dredging rod and the crushing plate are driven to reset in the conveying pipe. Therefore, in the process that the stirring arm rotates along with the rotating roller, the dredging rod drives the multiple crushing plates to reciprocate up and down in the material conveying pipe.

Description

Technical Field

[0001] The invention relates to the technical field of submerged arc welding machines, in particular to a welding device for petroleum casing. Background Art

[0002] In order to connect multiple sections of casing into a complete pipe string to meet the mechanical properties, sealing and corrosion resistance requirements of the wellbore structure during oil and natural gas extraction, a submerged arc welding machine is usually used to weld the multiple sections of casing formed by spot welding. When welding two sections of casing, a flux delivery device (mainly including a storage box and a delivery pipe) is set at the front end of the welding gun along the direction of the casing rotation to deliver the flux to the weld of the casing, and then the flux rotates with the casing and moves to the welding gun for arc combustion welding. Although the flux in the storage box is sealed, since the delivery pipe is connected to the outside world, the flux retained in the delivery pipe will agglomerate due to moisture absorption.

[0003] In the existing oil casing welding device, although the agglomerated flux can be crushed by setting a crushing structure in the storage box, the agglomerated flux remaining in the feeding pipe will block the feeding pipe, so that the crushed flux in the storage box cannot be smoothly transported to the weld. If the feeding pipe is unblocked, the crushed flux in the storage box will easily slide down from the weld due to excessive material feeding at one time.

[0004] In view of this, we propose a welding device for oil casing to improve the deficiencies in the prior art. Summary of the invention

[0005] The present invention provides a welding device for oil casing, which solves the problem that in the existing oil casing welding device, although the agglomerated flux can be crushed by setting a crushing structure in the storage box, the agglomerated flux retained in the feeding pipe will block the feeding pipe, so that the crushed flux in the storage box cannot be smoothly transported to the weld. If the feeding pipe is unblocked, the crushed flux in the storage box will easily slide down from the weld due to excessive material discharge at one time, that is:

[0006] When the feed pipe is blocked, the flux cannot fall smoothly. If the feed pipe is directly unblocked, it will cause excessive flux to fall from the weld.

[0007] To achieve the above purpose, the oil casing welding device comprises a welding frame, the welding frame is a "匚"-shaped structure, a material storage box is arranged on the top of the welding frame, a material delivery pipe is connected to the bottom of the material storage box, a partition assembly is arranged in the material storage box, the partition assembly comprises a partition, a plurality of toggle assemblies are arranged below the partition in the material storage box, and a dredging assembly is arranged in the material delivery pipe;

[0008] The partition divides the material storage box into a storage area and a material discharge area. The storage area is used to store flux. The top height of the dredging component is higher than the material delivery pipe. The partition is slidably connected to the material storage box.

[0009] During the rotation of the toggle assembly, the toggle assembly passes through the storage box to break up the agglomerated flux in the storage area to achieve intermittent unloading, and the rotation directions of the two toggle assemblies are opposite to each other to prevent the flux from gathering in the feed pipe. The toggle assembly drives the dredging assembly to shake up and down to dredge the feed pipe.

[0010] In the above technical solution, the partition assembly includes a plurality of limit grooves provided on the inner wall of the storage box, and a plurality of grids are provided on the partition. A limit rod is provided in each of the limit grooves, and the partition is slidably connected to each limit rod, and a first spring is sleeved on the periphery of the limit rod between the top of the partition and the top wall of the limit groove.

[0011] Based on the above technical solution, the toggle assembly includes a rotating roller rotatably connected between two inner walls of the storage box that are far away from each other, and a plurality of toggle arms are arranged on the periphery of the rotating roller. During the rotation of the rotating roller, the toggle arms pass through the grille, and when the rotating roller is perpendicular to the partition, the height of the top of the rotating roller is higher than the partition.

[0012] The dredging assembly includes a dredging rod arranged at the axis of the feeding pipe, and a plurality of crushing plates are arranged on the dredging rod along the axial direction. The edges of the crushing plates are in contact with the inner wall of the feeding pipe, and the edges of the crushing plates are provided with notches for flux to pass through. The dredging assembly includes a limit plate arranged on the inner wall of the feeding pipe, and the dredging rod is slidably connected to the limit plate. A baffle is fixedly connected to the top of the dredging rod, and the baffle is located in the material storage box. A second spring is sleeved between the limit plate and the baffle on the periphery of the dredging rod. The edge of the baffle is located on the rotation path of the toggle arm.

[0013] In another technical solution, after the flux is added into the storage box, the flux will first fall into the storage area. As the use time increases, the flux absorbs moisture and agglomerates. During the rotation of the rotating roller, the toggle arm continuously passes through the grille, thereby crushing the agglomerated flux. At the same time, the two rotating rollers rotating in opposite directions use the toggle arms thereon to push the flux on the top of the partition to both sides, thereby preventing the flux from passing through the grille and gathering at the mouth of the feed pipe to cause blockage. During the rotation of the rotating roller, the partition is toggled up and down in the storage box by the edge of the toggle arm, that is, the toggle arm passes through the grille, and in the process of reaching the top of the partition from the bottom of the partition, the partition is driven to slide up along the limit rod. During this period, the first spring stores elastic potential energy. After the toggle arm leaves the partition, the first spring releases the elastic potential energy to reset the partition.

[0014] After the flux passes through the grid and falls into the unloading area, the baffle located above the feed pipe prevents the flux from falling into the feed pipe all at once and causing the feed pipe to be blocked. Since the edge of the baffle is located on the rotation path of the toggle arm, the toggle arm lifts the baffle during the rotation of the toggle arm, and the baffle drives the dredging rod and the crushing plate to move upward. During this period, the second spring is stretched by the limit plate and the baffle with increased spacing to store elastic potential energy. When the toggle arm leaves the vicinity of the baffle, the baffle is reset under the action of the second spring restoring force, thereby driving the dredging rod and the crushing plate to reset in the feed pipe. Therefore, in the process of the toggle arm following the rotation of the rotating roller, the dredging rod drives multiple crushing plates to reciprocate up and down in the feed pipe, on the one hand, crushing the flux agglomerated in the feed pipe due to contact with the air, and at the same time, when the crushed flux passes through the notch at the edge of the crushing plate, the particle size of the flux will be further reduced by the friction between the notch and the inner wall of the feed pipe, which is beneficial to the subsequent melting welding of the welding gun.

[0015] Based on the above description, it can be seen that compared with the prior art, the beneficial effects of the present invention are:

[0016] During the rotation of the rotating roller, the toggle arm continuously passes through the grid to crush the agglomerated flux. At the same time, the two rotating rollers rotating in opposite directions use the toggle arms on them to push the flux on the top of the partition to both sides, thereby preventing the flux from passing through the grid and gathering at the pipe mouth of the feed pipe to cause blockage.

[0017] Since the edge of the baffle is located on the rotation path of the toggle arm, the toggle arm lifts the baffle during the rotation of the toggle arm, and the baffle drives the dredging rod and the crushing plate to move upward. During this period, the second spring is stretched by the limit plate and the baffle with increased spacing, thereby storing elastic potential energy. When the toggle arm leaves the vicinity of the baffle, the baffle is reset under the action of the restoring force of the second spring, thereby driving the dredging rod and the crushing plate to reset in the conveying pipe. Therefore, when the toggle arm rotates with the rotating roller, the dredging rod drives multiple crushing plates to reciprocate up and down in the conveying pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0019] Figure 1 It is a three-dimensional diagram of the overall structure of the present invention;

[0020] Figure 2 It is one of the partially cutaway stereograms of the present invention;

[0021] Figure 3 This is the second partially cutaway stereogram of the present invention;

[0022] Figure 4 It is a partially cut-away front view of the present invention;

[0023] Figure 5 It is a structural stereogram of the welding frame of the present invention;

[0024] Figure 6 is a cutaway perspective view of a partition assembly of the present invention;

[0025] Figure 7 is a cut-away front view of a partition assembly of the present invention;

[0026] Figure 8 For the present invention Figure 3 The enlarged view of point A in the middle;

[0027] Figure 9 is a cutaway perspective view of the toggle assembly of the present invention;

[0028] Figure 10 It is a cut-away left view of the toggle assembly of the present invention;

[0029] Figure 11 It is a cutaway perspective view of the dredging assembly of the present invention;

[0030] Figure 12 For the present invention Figure 11 The enlarged view of point B in the middle;

[0031] Figure 13 It is a cut-away left view of the dredging component of the present invention.

[0032] The meaning of each number in the figure is:

[0033] 100, welding frame; 110, welding gun; 120, rotating part; 130, material storage box; 140, material delivery pipe;

[0034] 200, partition assembly; 210, partition plate; 220, limit groove; 221, limit rod; 222, first spring; 230, grille;

[0035] 300, a toggle assembly; 310, a rotating roller; 320, a toggle arm;

[0036] 400, dredging assembly; 410, dredging rod; 420, baffle; 430, crushing plate; 440, limit plate; 450, second spring. DETAILED DESCRIPTION

[0037] The following will be combined with the accompanying drawings in 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.

[0038] See also Figures 1 - 4 As shown, the purpose of this embodiment is to provide a welding device for oil casing, including a welding frame 100, the welding frame 100 is a "匚"-shaped structure, a material storage box 130 is provided on the top of the welding frame 100, a material delivery pipe 140 is connected to the bottom of the material storage box 130, a partition assembly 200 is provided in the material storage box 130, the partition assembly 200 includes a partition 210, a plurality of toggle assemblies 300 are provided below the partition 210 in the material storage box 130, and a dredging assembly 400 is provided in the material delivery pipe 140;

[0039] The partition 210 divides the material storage box 130 into a storage area and a material discharge area. The storage area is used to store flux. The top height of the dredging component 400 is higher than the material delivery pipe 140. The partition 210 is slidably connected to the material storage box 130.

[0040] During the rotation of the toggle assembly 300, the toggle assembly 300 passes through the storage box 130 to break up the agglomerated flux in the storage area to achieve intermittent unloading, and the rotation directions of the two toggle assemblies 300 are opposite to each other to prevent the flux from gathering in the feed pipe 140. The toggle assembly 300 drives the clearing assembly 400 to shake up and down to clear the feed pipe 140.

[0041] like Figure 5 As shown, a pair of rotating members 120 are provided at intervals on the inner bottom wall of the welding frame 100 , and the two rotating members 120 rotate in the same direction. A welding gun 110 is provided on one side of a material storage box 130 on the inner top wall of the welding frame 100 .

[0042] The improvement lies in that the rotating member 120 comprises a plurality of driving wheels arranged side by side, and the driving wheels are used to drive the two sections of the preliminary spot welded sleeves to rotate.

[0043] exist Figures 6 - 8 In the embodiment, the partition assembly 200 includes a plurality of limiting grooves 220 formed on the inner wall of the storage box 130 , and a plurality of grilles 230 are formed on the partition plate 210 .

[0044] Furthermore, each limiting groove 220 is provided with a limiting rod 221 , the partition 210 is slidably connected to each limiting rod 221 , and a first spring 222 is sleeved on the periphery of the limiting rod 221 between the top of the partition 210 and the inner top wall of the limiting groove 220 .

[0045] It should be noted that after the power is turned on, the motor drives the rotating roller 310 coaxially connected to its output shaft to rotate, and the rotating roller 310 drives the toggle arm 320 to rotate. During the rotation, the toggle arm 320 continuously passes through the partition 210, driving the partition 210 to move up and down, so that the height of the storage area will change continuously, thereby crushing the agglomerated flux in the storage area.

[0046] Next, through Figures 9 - 10The specific structure of the toggle assembly 300 is disclosed. The toggle assembly 300 includes a rotating roller 310 rotatably connected between two inner walls of the storage box 130 that are separated from each other. A plurality of toggle arms 320 are disposed on the periphery of the rotating roller 310 .

[0047] Furthermore, during the rotation of the rotating roller 310 , the toggle arm 320 passes through the grille 230 , and when the rotating roller 310 is perpendicular to the partition 210 , the height of the top of the rotating roller 310 is higher than the partition 210 .

[0048] That is to say, after the flux is added into the storage box 130, the flux will first fall into the storage area. As the usage time increases, the flux will agglomerate after absorbing moisture. During the rotation of the rotating roller 310, the toggle arm 320 continuously passes through the grid 230, thereby crushing the agglomerated flux. At the same time, the two rotating rollers 310 rotating in opposite directions, through the toggle arms 320 thereon, push the flux on the top of the partition 210 to both sides, thereby preventing the flux from passing through the grid 230 and gathering at the pipe mouth of the feed pipe 140 to cause blockage. As the rotating roller 310 rotates, the partition 210 is pushed by the edge of the pushing arm 320 and slides up and down in the storage box 130, that is, the pushing arm 320 passes through the grille 230 and moves from the bottom of the partition 210 to the top of the partition 210, driving the partition 210 to slide up along the limiting rod 221. During this period, the first spring 222 stores elastic potential energy. After the pushing arm 320 leaves the partition 210, the first spring 222 releases the elastic potential energy so that the partition 210 is reset.

[0049] In order to solve the problem that the flux cannot fall smoothly when the delivery pipe 140 is blocked, directly unblocking the delivery pipe 140 will cause excessive flux to fall from the weld, so the present application provides a unblocking component 400 that can solve the above problem.

[0050] Based on the above description, Figures 11 - 13 The linkage effect between the toggle arm 320 and the clearing assembly 400 is explained. The clearing assembly 400 includes a clearing rod 410 arranged at the axis of the feed pipe 140. A plurality of crushing plates 430 are axially arranged on the clearing rod 410. The edges of the crushing plates 430 fit the inner wall of the feed pipe 140, and the edges of the crushing plates 430 are provided with gaps for the flux to pass through.

[0051] Furthermore, the dredging assembly 400 includes a limit plate 440 arranged on the inner wall of the conveying pipe 140, the dredging rod 410 is slidably connected to the limit plate 440, the top of the dredging rod 410 is fixedly connected with a baffle 420, the baffle 420 is located in the storage box 130, and a second spring 450 is sleeved between the limit plate 440 and the baffle 420 on the periphery of the dredging rod 410.

[0052] It should be disclosed that the edge of the baffle 420 is located on the rotation path of the toggle arm 320 .

[0053] It should be noted that after the flux passes through the grille 230 and falls into the blanking area, the baffle 420 located above the material conveying pipe 140 prevents the flux from all falling into the material conveying pipe 140 at one time, causing blockage of the material conveying pipe 140. Since the edge of the baffle 420 is on the rotation path of the toggle arm 320, during the rotation of the toggle arm 320, the toggle arm 320 lifts the baffle 420, and the baffle 420 drives the dredging rod 410 and the crushing plate 430 to move upward. During this period, the second spring 450 is stretched by the spacing-increased limiting plate 440 and the baffle 420, thereby storing elastic potential energy. When the toggle arm 320 leaves the vicinity of the baffle 420, the baffle 420 resets under the action of the restoring force of the second spring 450, thereby driving the dredging rod 410 and the crushing plate 430 to reset in the material conveying pipe 140. Therefore, during the rotation of the toggle arm 320 following the rotating roller 310, the dredging rod 410 drives the plurality of crushing plates 430 to reciprocate up and down in the material conveying pipe 140. On the one hand, the flux caked in the material conveying pipe 140 due to contact with air is crushed. At the same time, when the crushed flux passes through the edge notch of the crushing plate 430, the particle size of the flux will be further reduced by the friction between the notch and the inner wall of the material conveying pipe 140, which is beneficial to the subsequent melting welding of the welding torch 110.

[0054] In summary, the working principle of the present invention is as follows:

[0055] First, the two sections of the casing that have completed the preliminary spot welding are placed on the top of the two rows of driving wheels. Then, the two rows of driving wheels drive the casing to rotate, and the material conveying pipe 140 releases the flux at the weld of the casing. The rotating casing drives the flux to turn below the welding torch 110 for melting welding.

[0056] During the welding process, after adding the flux to the storage tank 130, the flux will first fall into the storage area. As the usage time increases, the flux absorbs moisture and cakes. During the rotation of the rotating roller 310, the toggle arm 320 continuously passes through the grille 230, thereby crushing the caked flux. At the same time, the two oppositely rotating rotating rollers 310, through the toggle arms 320 thereon, dial the flux on the top of the partition plate 210 to both sides, thereby preventing the flux from gathering at the pipe orifice of the material conveying pipe 140 after passing through the grille 230 and causing blockage. Since during the rotation of the rotating roller 310, the partition plate 210 is toggled by the edge of the toggle arm 320 and slides up and down in the storage tank 130, that is, when the toggle arm 320 passes through the grille 230 and reaches above the partition plate 210 from below the partition plate 210, it drives the partition plate 210 to slide up along the limiting rod 221. During this period, the first spring 222 stores elastic potential energy. After the toggle arm 320 leaves the partition plate 210, the first spring 222 releases the elastic potential energy, and thus the partition plate 210 resets.

[0057] After the flux passes through the grid 230 and falls into the unloading area, the baffle 420 located above the feed pipe 140 prevents the flux from falling into the feed pipe 140 at once and causing the feed pipe 140 to be blocked. Since the edge of the baffle 420 is located on the rotation path of the toggle arm 320, during the rotation of the toggle arm 320, the toggle arm 320 lifts the baffle 420, and the baffle 420 drives the dredging rod 410 and the crushing plate 430 to move upward. During this period, the second spring 450 is stretched by the limit plate 440 and the baffle 420 with an increased spacing, thereby storing elastic potential energy. When the toggle arm 320 leaves the vicinity of the baffle 420, the baffle 420 is reset under the action of the restoring force of the second spring 450, thereby driving the dredging rod 410 and the crushing plate 430 to reset in the feed pipe 140. Therefore, when the toggle arm 320 rotates following the rotating roller 310, the clearing rod 410 drives the multiple crushing plates 430 to make reciprocating motion up and down in the feed pipe 140. On the one hand, the flux that has agglomerated due to contact with the air in the feed pipe 140 is crushed. At the same time, when the crushed flux passes through the notch at the edge of the crushing plate 430, the particle size of the flux will be further reduced by friction between the notch and the inner wall of the feed pipe 140, which is beneficial to the subsequent melting welding of the welding gun 110.

[0058] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A welding device for oil casing, comprising a welding frame (100), the welding frame (100) being a "匚"-shaped structure, a material storage box (130) being provided on the top of the welding frame (100), a material delivery pipe (140) being connected to the bottom of the material storage box (130), a partition assembly (200) being provided in the material storage box (130), the partition assembly (200) comprising a partition plate (210), a plurality of toggle assemblies (300) being provided below the partition plate (210) in the material storage box (130), a dredging assembly (400) being provided in the material delivery pipe (140), characterized in that: The partition (210) divides the material storage box (130) into a storage area and a material discharge area. The storage area is used to store flux. The top height of the dredging component (400) is higher than the material delivery pipe (140). The partition (210) is slidably connected to the material storage box (130). During the rotation of the toggle assembly (300), the toggle assembly (300) passes through the storage box (130) to break up the agglomerated flux in the storage area to achieve intermittent unloading, and the rotation directions of the two toggle assemblies (300) are opposite to each other to prevent the flux from gathering at the feed pipe (140). The toggle assembly (300) drives the unblocking assembly (400) to shake up and down to unblock the feed pipe (140).

2. The welding device for oil casing according to claim 1, characterized in that: A pair of rotating members (120) are arranged at intervals on the inner bottom wall of the welding frame (100), and the two rotating members (120) rotate in the same direction. A welding gun (110) is arranged on the inner top wall of the welding frame (100) at one side of the material storage box (130).

3. The welding device for oil casing according to claim 2, wherein: The rotating member (120) comprises a plurality of driving wheels arranged side by side, and the driving wheels are used to drive the two sections of the initially spot-welded sleeves to rotate.

4. The welding device for oil casing according to claim 1, wherein: The partition assembly (200) comprises a plurality of limiting grooves (220) formed on the inner side wall of the material storage box (130), and a plurality of grilles (230) are formed on the partition plate (210).

5. The welding device for oil casing according to claim 4, characterized in that: A limiting rod (221) is provided in each limiting groove (220), the partition (210) is slidably connected to each limiting rod (221), and a first spring (222) is sleeved on the periphery of the limiting rod (221) between the top of the partition (210) and the inner top wall of the limiting groove (220).

6. The welding device for oil casing according to claim 4, wherein: The toggle assembly (300) comprises a rotating roller (310) rotatably connected between two inner walls of the material storage box (130) that are separated from each other, and a plurality of toggle arms (320) are arranged on the periphery of the rotating roller (310).

7. The welding device for oil casing according to claim 6, characterized in that: During the rotation of the rotating roller (310), the toggling arm (320) passes through the grille (230), and when the rotating roller (310) is perpendicular to the partition (210), the height of the top of the rotating roller (310) is higher than the partition (210).

8. The welding device for oil casing according to claim 6, characterized in that: The dredging assembly (400) comprises a dredging rod (410) arranged at the axis of the feed pipe (140), and a plurality of crushing plates (430) are axially arranged on the dredging rod (410), the edges of the crushing plates (430) are in contact with the inner wall of the feed pipe (140), and the edges of the crushing plates (430) are provided with notches for flux to pass through.

9. The welding device for oil casing according to claim 8, wherein: The dredging assembly (400) includes a limit plate (440) arranged on the inner wall of the conveying pipe (140), the dredging rod (410) is slidably connected to the limit plate (440), the top of the dredging rod (410) is fixedly connected with a baffle (420), and the baffle (420) is located in the storage box (130), and a second spring (450) is sleeved on the outer periphery of the dredging rod (410) between the limit plate (440) and the baffle (420).

10. The welding device for oil casing according to claim 9, characterized in that: The edge of the baffle (420) is located on the rotation path of the toggle arm (320).

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