A welding device for oil casings

Abstract

The present application relates to submerged arc welding machine technical field, specifically, it relates to a kind of welding device for oil casing.It includes welding frame, the top of the welding frame is equipped with storage tank, the bottom of the storage tank is connected with material conveying pipe, the storage tank is equipped with partition assembly, the partition assembly includes baffle, the storage tank is equipped with multiple poking assembly below baffle, the material conveying pipe is equipped with dredging assembly;During the rotation of rotating roller, poking arm constantly passes through grid, and the flux on the top of baffle is poked to both sides by the poking arm thereon, to prevent the flux from being gathered in the pipe opening of material conveying pipe after passing through grid and causing blockage.When the poking arm leaves the vicinity of baffle, the baffle resets under the action of the restoring force of second spring, to drive dredging rod and crushing plate to reset in material conveying pipe.In the process that poking arm rotates with rotating roller, dredging rod drives multiple crushing plates to reciprocate in material conveying pipe.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of submerged arc welding machine, in particular to a welding device for oil casing. BACKGROUND

[0002] In order to connect the multi-section casing into a complete pipe column to meet the mechanical properties, sealing and corrosion resistance requirements of wellbore structure in the process of oil and gas exploitation, the multi-section casing formed by spot welding is usually welded by submerged arc welding machine. When welding two sections of casing, the front end of the welding gun is provided with a flux conveying device (mainly including a storage box and a conveying pipe) along the rotating direction of the casing, which conveys the flux to the weld of the casing, and then the flux is moved to the welding gun for arc burning welding along with the casing. Although the flux in the storage box is sealed, the flux remaining in the conveying pipe will be caked due to moisture absorption.

[0003] In the existing oil casing welding device, although the caked flux can be crushed by setting a crushing structure in the storage box, the caked flux remaining in the conveying pipe will block the conveying pipe, causing the crushed flux in the storage box to be unable to be smoothly conveyed to the weld. If the conveying pipe is unblocked, the crushed flux in the storage box will easily slide off from the weld due to excessive one-time discharge.

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

[0005] The present application provides a welding device for oil casing, which solves the problem that in the existing oil casing welding device, although the caked flux can be crushed by setting a crushing structure in the storage box, the caked flux remaining in the conveying pipe will block the conveying pipe, causing the crushed flux in the storage box to be unable to be smoothly conveyed to the weld. If the conveying pipe is unblocked, the crushed flux in the storage box will easily slide off from the weld due to excessive one-time discharge, i.e.:

[0006] When the conveying pipe is blocked, the flux cannot fall smoothly, and directly unblocking the conveying pipe will cause the flux to be discharged too much and slide off from the weld.

[0007] To achieve the above purpose, the welding device for oil casing comprises a welding frame, which is a " " shaped structure, the top of the welding frame is provided with a storage box, the bottom of the storage box is connected with a conveying pipe, the storage box is provided with a partition assembly, the partition assembly comprises a partition plate, a plurality of poking assemblies are arranged below the partition plate in the storage box, and a unblocking assembly is arranged in the conveying pipe.

[0008] The partition plate divides the storage tank into a storage area and a discharging area, the storage area is used for storing flux, the top of the dredging assembly is higher than the feeding pipe, the partition plate is slidably connected with the storage tank,

[0009] During the rotation of the stirring assembly, the stirring assembly passes through the storage tank to crush the caked flux in the storage area, so as to realize intermittent discharging, and the rotation directions of the two stirring assemblies are opposite to each other, so as to prevent the flux from gathering at the feeding pipe, and the stirring assembly drives the dredging assembly to shake up and down to dredge the feeding pipe.

[0010] In the above technical solution, the partition assembly includes a plurality of limiting grooves formed on the inner side wall of the storage tank, and a plurality of grids are formed on the partition plate. A limiting rod is arranged in each limiting groove, and the partition plate is slidably connected with each limiting rod. A first spring is arranged around the limiting rod between the top of the partition plate and the top wall of the limiting groove.

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

[0012] The dredging assembly includes a dredging rod arranged at the axis of the feeding pipe, a plurality of crushing plates are arranged on the dredging rod in the axial direction, the edges of the crushing plates are attached to the inner wall of the feeding pipe, and the edges of the crushing plates are provided with gaps for the flux to pass through. The dredging assembly includes a limiting plate arranged on the inner wall of the feeding pipe, the dredging rod is slidably connected with the limiting plate, the top of the dredging rod is fixedly connected with a baffle, the baffle is located in the storage tank, and a second spring is arranged around the dredging rod between the limiting plate and the baffle. The edge of the baffle is located on the path of rotation of the stirring arm.

[0013] In another technical solution, after the flux is added into the storage tank, the flux will first fall into the storage area. As the use time increases, the flux will be caked due to moisture absorption. During the rotation of the rotating roller, the stirring arms continuously pass through the grids, thereby crushing the caked flux. Meanwhile, the two rotating rollers rotating towards each other drive the flux on the top of the partition plate to the two sides through the stirring arms thereon, thereby preventing the flux from gathering at the pipe opening of the feeding pipe after passing through the grids. During the rotation of the rotating roller, the partition plate slides up and down in the storage tank due to the stirring of the edges of the stirring arms, that is, the stirring arms pass through the grids, and the partition plate slides up along the limiting rod from below the partition plate to above the partition plate, during which the first spring stores elastic potential energy. After the stirring arms move away from the partition plate, the first spring releases the elastic potential energy to reset the partition plate.

[0014] When the flux falls through the grid to the feeding area, the baffle above the feeding pipe prevents the flux from falling into the feeding pipe at one time and causing the feeding pipe to be blocked. Since the edge of the baffle is located in the path of the rotating of the poking arm, during the rotation of the poking arm, the poking arm lifts the baffle, the baffle drives the dredging rod and the breaking plate to move upward, during which the second spring is stretched by the spacing-increased limiting plate and the baffle to store elastic potential energy. When the poking arm leaves the vicinity of the baffle, the baffle resets under the action of the restoring force of the second spring, thereby driving the dredging rod and the breaking plate to reset in the feeding pipe. Thus, during the rotation of the poking arm following the rotation of the rotating roller, the dredging rod drives the multiple breaking plates to do up-and-down reciprocating motion in the feeding pipe, on the one hand, the flux agglomerated in the feeding pipe due to the contact with air is crushed, and on the other hand, when the crushed flux passes through the gap at the edge of the breaking plate, the particle size of the flux is further reduced by the friction between the gap and the inner wall of the feeding pipe, thereby being beneficial to the subsequent melting and welding of the welding gun.

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

[0016] During the rotation of the rotating roller, the poking arm continuously passes through the grid, thereby crushing the agglomerated flux, and the two opposite rotating rollers drive the flux at the top of the partition plate to the two sides through the poking arms thereon, thereby preventing the flux from gathering at the pipe opening of the feeding pipe after passing through the grid and causing the pipe opening to be blocked.

[0017] Since the edge of the baffle is located in the path of the rotating of the poking arm, during the rotation of the poking arm, the poking arm lifts the baffle, the baffle drives the dredging rod and the breaking plate to move upward, during which the second spring is stretched by the spacing-increased limiting plate and the baffle to store elastic potential energy. When the poking arm leaves the vicinity of the baffle, the baffle resets under the action of the restoring force of the second spring, thereby driving the dredging rod and the breaking plate to reset in the feeding pipe. Thus, during the rotation of the poking arm following the rotation of the rotating roller, the dredging rod drives the multiple breaking plates to do up-and-down reciprocating motion in the feeding pipe. BRIEF DESCRIPTION OF DRAWINGS

[0018] The accompanying drawings are included to provide a further understanding of the present application, and constitute a part of the specification, illustrate the present application and are used to explain the present application, and do not constitute a limitation on the present application. In the drawings:

[0019] Figure 1 is a perspective view of the overall structure of the present application;

[0020] Figure 2 is one of the partial cutaway perspective views of the present application;

[0021] Figure 3 is the second partial cutaway perspective view of the present application;

[0022] Figure 4 is the partial cutaway front view of the present application;

[0023] Figure 5 is a structural perspective view of the welding frame of the present application;

[0024] Figure 6 is a sectional perspective view of the partition assembly of the present application;

[0025] Figure 7 is a sectional front view of the partition assembly of the present application;

[0026] Figure 8 is a sectional perspective view of the pushing assembly of the present application; Figure 3 is an enlarged view of A in the figure;

[0027] Figure 9 is a sectional perspective view of the unclogging assembly of the present application;

[0028] Figure 10 is a sectional left view of the unclogging assembly of the present application;

[0029] Figure 11 is a sectional perspective view of the unclogging assembly of the present application;

[0030] Figure 12 is an enlarged view of B in the figure; Figure 11

[0031] Figure 13 is a sectional left view of the unclogging assembly of the present application.

[0032] The meanings of the respective reference numerals in the figures are as follows:

[0033] 100, welding frame; 110, welding torch; 120, rotating member; 130, storage tank; 140, material conveying pipe;

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

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

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

[0037] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those of ordinary skill in the art without creative work, fall within the protection scope of the present application. ​

[0038] Please refer to Figures 1-4 As shown in the figure, the embodiment aims to provide a welding device for oil casing, which comprises a welding frame 100, the welding frame 100 is in a “” shape structure, the top of the welding frame 100 is provided with a storage tank 130, the bottom of the storage tank 130 is connected with a feeding pipe 140, the storage tank 130 is provided with a separation assembly 200, the separation assembly 200 comprises a partition plate 210, the storage tank 130 is provided with a plurality of poking assemblies 300 below the partition plate 210, the feeding pipe 140 is provided with a dredging assembly 400;

[0039] The partition plate 210 divides the storage tank 130 into a storage area and a discharging area, the storage area is used for storing welding flux, the top of the dredging assembly 400 is higher than the feeding pipe 140, the partition plate 210 is slidingly connected with the storage tank 130,

[0040] During the rotation of the poking assembly 300, the poking assembly 300 passes through the storage tank 130 to crush the agglomerated welding flux in the storage area, so as to realize intermittent discharging, and the rotation directions of the two poking assemblies 300 are opposite to each other, so as to prevent the welding flux from gathering at the feeding pipe 140, and the poking assembly 300 drives the dredging assembly 400 to shake up and down to dredge the feeding pipe 140.

[0041] As shown in the figure, Figure 5 A pair of rotating members 120 are arranged at the inner bottom wall of the welding frame 100, the rotating directions of the two rotating members 120 are the same, and a welding gun 110 is arranged at one side of the storage tank 130 of 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 casing for preliminary spot welding to rotate.

[0043] In the Figures 6-8 , the separation assembly 200 comprises a plurality of limiting grooves 220 opened on the inner side wall of the storage tank 130, and a plurality of grids 230 are opened on the partition plate 210.

[0044] Furthermore, a limiting rod 221 is arranged in each limiting groove 220, the partition plate 210 is slidingly connected with each limiting rod 221, and a first spring 222 is sleeved around the limiting rod 221 between the top of the partition plate 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 with the output shaft to rotate, the rotating roller 310 drives the poking arm 320 to rotate, the poking arm 320 continuously passes through the partition plate 210 during the rotation, drives the partition plate 210 to shake up and down, and thus the height of the storage area will change constantly, so that the agglomerated welding flux in the storage area can be crushed.

[0046] Next, by Figures 9-10The specific structure of the poking assembly 300 is disclosed, the poking assembly 300 comprises a rotating roller 310 rotatably connected between two inner walls of the storage tank 130 away from each other, and a plurality of poking arms 320 are arranged on the outer periphery of the rotating roller 310.

[0047] Further, in the process of rotating the rotating roller 310, the poking arms 320 pass through the grid 230, and when the rotating roller 310 is perpendicular to the partition plate 210, the height of the top of the rotating roller 310 is higher than the height of the top of the partition plate 210.

[0048] That is, after the flux is added to the storage tank 130, the flux will first fall into the storage area, and as the use time increases, the flux will be clumped after being absorbed by moisture, and in the process of rotating the rotating roller 310, the poking arms 320 continuously pass through the grid 230, thereby crushing the clumped flux, and the two opposite rotating rollers 310 push the flux on the top of the partition plate 210 to the two sides through the poking arms 320 thereon, thereby preventing the flux from being blocked after passing through the grid 230 and gathering at the pipe opening of the feeding pipe 140. Since the partition plate 210 slides up and down in the storage tank 130 in the process of rotating the rotating roller 310, that is, the poking arms 320 pass through the grid 230 from below the partition plate 210 to above the partition plate 210, the partition plate 210 is driven to slide up along the limiting rod 221, and the first spring 222 stores elastic potential energy during this process, and after the poking arms 320 leave the partition plate 210, the first spring 222 releases the elastic potential energy to reset the partition plate 210.

[0049] In order to solve the problem that the flux cannot smoothly fall when the feeding pipe 140 is blocked, and directly dredging the feeding pipe 140 will cause the flux to fall too much from the weld and slide off, the application sets a dredging assembly 400 which can solve the above problems.

[0050] Based on the above description, the linkage effect of the poking arms 320 and the dredging assembly 400 will be explained below. Figures 11-13 The dredging assembly 400 comprises a dredging rod 410 arranged at the axis of the feeding pipe 140, a plurality of breaking plates 430 are arranged on the dredging rod 410 in the axial direction, the edges of the breaking plates 430 are attached to the inner wall of the feeding pipe 140, and the edges of the breaking plates 430 are provided with notches for the flux to pass through.

[0051] Further, the dredging assembly 400 comprises a limiting plate 440 arranged on the inner wall of the feeding pipe 140, the dredging rod 410 is slidably connected with the limiting plate 440, the top of the dredging rod 410 is fixedly connected with a baffle 420, the baffle 420 is located in the storage tank 130, and a second spring 450 is arranged between the limiting plate 440 and the baffle 420 on the outer periphery of the dredging rod 410.

[0052] It needs to be disclosed that the edges of the baffle 420 are located on the path of rotation of the poking arms 320.

[0053] It should be noted that when the flux falls into the delivery pipe 140 after passing through the grid 230, the baffle 420 located above the delivery pipe 140 prevents the flux from falling into the delivery pipe 140 at one time, causing the delivery pipe 140 to be blocked. Since the edge of the baffle 420 is located in the path of rotation of the poking arm 320, during the rotation of the poking arm 320, the poking arm 320 lifts the baffle 420, and the baffle 420 drives the dredging rod 410 and the crushing plate 430 to move upward, and during this period, the second spring 450 is stretched by the spacing increasing limiting plate 440 and the baffle 420, thereby storing elastic potential energy. When the poking arm 320 moves away from 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 delivery pipe 140. Therefore, during the rotation of the poking arm 320 following the rotation of the rotating roller 310, the dredging rod 410 drives the plurality of crushing plates 430 to move up and down in the delivery pipe 140, which on the one hand crushes the flux in the delivery pipe 140 that is caked due to contact with air, and on the other hand, when the crushed flux passes through the gap at the edge of the crushing plate 430, the particle size of the flux is further reduced by friction with the inner wall of the delivery pipe 140, thereby facilitating subsequent melting welding by the welding gun 110.

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

[0055] First, the two sections of the sleeve that have completed preliminary spot welding are placed on the top of the two rows of drive wheels, and then the two rows of drive wheels drive the sleeve to rotate, the delivery pipe 140 releases the flux at the weld of the sleeve, and the rotating sleeve drives the flux to rotate to the lower side of the welding gun 110 for melting welding.

[0056] During the welding process, after the flux is added to the storage tank 130, the flux will first fall into the storage area. As the use time increases, the flux is caked after absorbing moisture. During the rotation of the rotating roller 310, the poking arm 320 continuously passes through the grid 230, thereby crushing the caked flux. At the same time, the two oppositely rotating rotating rollers 310 drive the flux at the top of the partition plate 210 to the two sides through the poking arm 320 thereon, thereby preventing the flux from gathering at the pipe opening of the delivery pipe 140 after passing through the grid 230, causing blockage. Since the partition plate 210 slides up and down in the storage tank 130 during the rotation of the rotating roller 310, that is, the poking arm 320 passes through the grid 230, the partition plate 210 slides up along the limiting rod 221 from below the partition plate 210 to above the partition plate 210, and during this period, the first spring 222 stores elastic potential energy. After the poking arm 320 moves away from the partition plate 210, the first spring 222 releases the elastic potential energy, thereby resetting the partition plate 210.

[0057] When the flux falls into the feeding pipe 140 through the grid 230, the baffle 420 prevents the flux from falling into the feeding pipe 140 at one time and causing the feeding pipe 140 to be blocked. Since the edge of the baffle 420 is located on the path of the rotation of the poking arm 320, during the rotation of the poking arm 320, the poking arm 320 lifts the baffle 420, and the baffle 420 drives the dredging rod 410 and the breaking plate 430 to move upward, during which the second spring 450 is stretched by the spacing increasing limiting plate 440 and the baffle 420 to store elastic potential energy. When the poking 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 breaking plate 430 to reset in the feeding pipe 140. Therefore, during the rotation of the poking arm 320 following the rotation of the rotating roller 310, the dredging rod 410 drives the plurality of breaking plates 430 to do up-and-down reciprocating motion in the feeding pipe 140, which on the one hand breaks the flux in the feeding pipe 140 into pieces due to the contact with the air, and on the other hand, when the broken flux passes through the edge gap of the breaking plate 430, the particle size of the flux is further reduced by the friction between the gap and the inner wall of the feeding pipe 140, thereby being beneficial to the subsequent melting and welding of the welding gun 110.

[0058] The above shows and describes the basic principles, main features and advantages of the present application. It should be understood by those skilled in the art that the present application is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only preferred examples of the present application and are not intended to limit the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A welding device for oil casing, comprising a welding frame (100). The welding frame (100) has a "U" - shaped structure. A storage tank (130) is provided at the top of the welding frame (100). A feeding pipe (140) is connected to the bottom of the storage tank (130). A separating component (200) is arranged in the storage tank (130). The separating component (200) includes a partition plate (210). A plurality of拨动组件 (300) are arranged below the partition plate (210) in the storage tank (130). A dredging component (400) is arranged in the feeding pipe (140). It is characterized in that: The partition plate (210) divides the storage tank (130) into a storage area and a blanking area. The storage area is used for storing flux. The top height of the dredging component (400) is higher than that of the feeding pipe (140). The partition plate (210) is slidably connected to the storage tank (130). During the rotation of the拨动组件 (300), the拨动组件 (300) passes through the storage tank (130) to break up the agglomerated flux in the storage area, so as to achieve intermittent blanking. The rotation directions of the two拨动组件 (300) are opposite to each other to prevent the flux from gathering at the feeding pipe (140). The拨动组件 (300) drives the dredging component (400) to vibrate up and down to dredge the feeding pipe (140). The separating component (200) includes a plurality of limiting grooves (220) opened on the inner side wall of the storage tank (130). A plurality of gratings (230) are opened on the partition plate (210). A limiting rod (221) is arranged in each limiting groove (220). The partition plate (210) is slidably connected to each limiting rod (221). A first spring (222) is sleeved between the top of the partition plate (210) and the inner top wall of the limiting groove (220) around the limiting rod (221). The拨动组件 (300) includes a rotating roller (310) rotatably connected between two opposite inner walls of the storage tank (130). A plurality of拨动 arms (320) are arranged on the periphery of the rotating roller (310). During the rotation of the rotating roller (310), the拨动 arms (320) pass through the gratings (230). When the rotating roller (310) is perpendicular to the partition plate (210), the height of the top of the rotating roller (310) is higher than that of the partition plate (210).

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

3. The oil casing welding device according to claim 2, characterized in that: The rotating part (120) includes a plurality of driving wheels arranged side by side. The driving wheels are used to drive the rotation of two sections of the casing for preliminary spot welding.

4. The oil casing welding device according to claim 1, characterized in that: The dredging component (400) includes a dredging rod (410) arranged at the axis of the feeding pipe (140). A plurality of crushing plates (430) are arranged along the axial direction on the dredging rod (410). The edge of the crushing plate (430) fits the inner wall of the feeding pipe (140), and a notch for the flux to pass through is opened on the edge of the crushing plate (430). It should be noted that there is an undefined term "拨动组件" and "拨动臂" in the original text. You may need to replace them with the correct English terms according to the actual situation.

5. The oil casing welding device according to claim 4, characterized in that: The dredging assembly (400) includes a limit plate (440) arranged on the inner wall of the feeding pipe (140), the dredging rod (410) is slidably connected to the limit plate (440), the top of the dredging rod (410) is fixedly connected to a baffle (420), and the baffle (420) is located in the storage box (130). The outer periphery of the dredging rod (410) is provided with a second spring (450) between the limit plate (440) and the baffle (420).

6. The oil casing welding device according to claim 5, characterized in that: The edge of the baffle (420) is located on the rotation path of the toggle arm (320).

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