Soldering flux recovery device for spiral welded pipe

Abstract

A spiral welded pipe welding flux recovery device comprises a negative pressure suction agent, a welding flux unloading box, a switching cylinder, a suction agent conical shell and a negative pressure mechanism, a material blocking barrel is arranged at the top of the suction agent conical shell, a rotary suction cover is arranged at the bottom of the suction agent conical shell, and the negative pressure mechanism is communicated with the material blocking barrel to continuously generate negative pressure; comprising an agent unloading conical shell which is communicated with an agent absorbing conical shell end to end, and a rotary unloading cover is arranged at the bottom of the agent unloading conical shell; when the switching cylinder is in a material suction mode that the rotary suction cover is closed and the rotary discharge cover is opened, and when the switching cylinder is in a material discharge mode that the rotary discharge cover is closed and the rotary suction cover is opened, the switching cylinder is matched with the negative pressure mechanism to achieve automatic switching between the material suction mode and the material discharge mode.

Description

Technical Field

[0001] This utility model relates to the field of spiral welded pipe manufacturing technology, specifically to a spiral welded pipe flux recovery device. Background Technology

[0002] Submerged arc welding (SAW) is a method of welding two or more materials by using the heat generated from an electric arc between a welding wire (serving as a welding seal) and the base metal, within a granular flux deposited as a flux solvent. Granular flux is pre-deposited on the base metal, and a welding wire with a continuous current is supplied through it. The arc is covered by the flux and is not visible from the outside. The flux blocks the atmosphere, protecting the metal during the refining process and contributing to the formation of weld beads or slag. Due to the size of the welding wire and the high current used, SAW is widely used as a highly efficient joining technology for steel structures that penetrate deep and thick plates. Typically, 12 to 200 mesh flux particles, or flux particles with a diameter of approximately 0.3-1.0 mm, are used in SAW. In the production of SAW steel pipes, the flux serves as a protective auxiliary material during weld formation, with only a small portion forming slag during the welding process. If the remaining portion is not recycled, it will consume a large amount of flux, increasing the production cost of steel pipes. On the other hand, the dust caused by spilled flux endangers the health of employees and does not meet HSE requirements.

[0003] The flux recovery process used by spiral submerged arc welded steel pipe manufacturers has encountered problems such as unloading devices failing to unload and pipeline blockages, which prevents continuous and stable operation and has a significant impact on normal welding production.

[0004] Therefore, there is an urgent need in this field for a flux regeneration device for spiral welded pipes. The equipment used to recover flux should have a simple and compact structure and a long service life, and ensure reliable operation without interference for a long time. This has become a key problem that is difficult to overcome in the development of flux regeneration devices for spiral welded pipes. Utility Model Content

[0005] To address the shortcomings of the existing technology, the purpose of this utility model is to provide a polyethylene winding pressure roller device for large-diameter spiral welded pipes, which ensures that the polyethylene is uniformly flattened and compacted across its entire width, thereby reducing wrinkles.

[0006] The purpose of this utility model is achieved as follows: a spiral welded pipe flux recovery device, comprising...

[0007] The negative pressure suction agent includes a suction cone shell and a negative pressure mechanism. The suction cone shell is provided with a baffle cylinder at the top and a suction opening at the bottom. The suction opening is provided with a rotating suction cap. The negative pressure mechanism is connected to the baffle cylinder to continuously generate negative pressure.

[0008] The flux removal box includes a flux removal cone shell and a flux suction cone shell connected end to end. The bottom of the flux removal cone shell is provided with a flux removal opening, and the flux removal opening is provided with a rotating discharge cover.

[0009] When in the suction mode with the rotary suction cap closed and the rotary unloading cap open, the negative pressure suction agent continuously draws the flux into it to achieve automatic suction. When in the unloading mode with the rotary unloading cap closed and the rotary suction cap open, the flux from the negative pressure suction agent can still be automatically unloaded into the flux unloading tank without stopping the negative pressure mechanism.

[0010] The switching cylinder, in conjunction with the negative pressure mechanism, enables automatic switching between the suction mode and the discharge mode.

[0011] Furthermore, the switching cylinder includes a shell cavity, a piston, and a control cylinder. The shell cavity is connected to the suction cone and the discharge cone via suction lines and discharge lines, respectively. One side of the discharge line is provided with an air vent. The opening of the shell cavity connecting to the discharge line is located between the air vent and the opening of the shell cavity connecting to the suction line. The annular portion of the shell cavity between the air vent and the opening of the discharge line is the atmospheric connection section A. The annular portion of the shell cavity between the opening of the discharge line and the opening of the suction line is the negative pressure connection section B. The piston switches between the atmospheric connection section A and the negative pressure connection section B once every time interval t.

[0012] Furthermore, it also includes a timing module, which triggers a switching action of the switching cylinder every time interval t, while the timing module resets to zero.

[0013] Furthermore, the timing module includes a clock and a trigger switch. The trigger switch is connected to the control cylinder. When the trigger switch is closed, the control cylinder is energized and triggers a switching action of the switching cylinder. After completion, the trigger switch is opened, and at the same time, the clock is reset to zero.

[0014] Furthermore, the negative pressure mechanism includes a negative pressure capillary tube, an expanding tube, an axial flow fan, and a guide air mechanism. The negative pressure capillary tube is provided with a venting section, which is sealed inside the transition sleeve. The air inlet of the transition sleeve is connected to the top opening of the baffle cylinder.

[0015] Furthermore, the axial flow fan and air guide of the negative pressure mechanism are installed inside the sound absorption structure. The sound absorption structure includes a circular ring shell and a dome spherical cover. The inner wall of the circular ring shell is provided with a porous sound-absorbing pad, and the inner wall of the dome spherical cover is provided with a sound-absorbing and venting pad with a large channel and high porosity. The dome spherical cover is provided with multiple exhaust holes at intervals.

[0016] Furthermore, it also includes a dust-collecting structure, which is arranged side by side on the side of the absorbent cone shell and connected to it through a connecting channel; the dust-collecting structure includes a dust-collecting cone shell and a connecting channel, and multiple filters are provided opposite the connecting channel to capture dust while allowing only air to pass through, and the top of the dust-collecting cone shell is connected to a negative pressure mechanism.

[0017] A flux recovery device for spiral welded pipes is provided. The negative pressure flux suction 10 and the flux unloading box 20 work together to achieve automated continuous suction and intermittent unloading. The flux is heated in the storage cone 80 and continuously falls to the welding position. The suction flux is also removed by the dust collection structure 70. It is simple, reliable and has great practical value. Attached Figure Description

[0018] Figure 1 This is a front view of Embodiment 1 of the flux recovery device for spiral welded pipes according to this utility model;

[0019] Figure 2 This is a front view of Embodiment 2 of the flux recovery device for spiral welded pipes according to the present invention.

[0020] The reference numerals in the above figure:

[0021] 10 Negative pressure suction, 11 Suction cone shell, 12 Suction opening, 13 Rotary suction cap, 14 Baffle cylinder, 15 Suction port, 16 Suction hose, 17 Negative pressure nozzle, 18 Filter screen, 19 Baffle plate.

[0022] 20 Flux unloading box, 21 Flux unloading cone shell, 22 Flux unloading opening, 23 Rotary unloading cover, 24 Positioning seat, 25 Mating hole, 26 Sealing ring, 27 Discharge pipe.

[0023] 30 Switching cylinder, 31 Shell cavity, 32 Piston, 33 Control cylinder, 34 Suction line, 35 Discharge line, 36 Vent to vent.

[0024] 40 Timing module, 41 Clock, 42 ​​Trigger switch

[0025] 50 Negative pressure mechanism, 51 Negative pressure capillary tube, 52 Expanding diameter tube, 53 Axial flow fan, 54 Guide air mechanism, 55 Transition sleeve, 56 Vent section, 58 Air guide plate, 59 Air outlet channel.

[0026] 60 Sound-absorbing pad, 61 Circular cover, 62 Dome-shaped dome, 63 Porous sound-absorbing pad, 64 Sound-absorbing venting pad, 65 Exhaust vent, 66 Wave-shaped concave shape, 67 Conical concave shape, 68 Wave crest line.

[0027] 70 Dust collection structure, 71 Dust collection cone shell, 72 Connecting channel, 73 Filter, 74 Discharge pipe, 75 Manual valve.

[0028] 80 Storage cone, 81 Supply piping, 82 Manual valve, 83 Heater. Detailed Implementation

[0029] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but are not intended to limit the scope of the present invention.

[0030] Example 1

[0031] A flux recovery device for spiral welded pipes, comprising:

[0032] The negative pressure absorbent 10 includes an absorbent cone shell 11 and a negative pressure mechanism 50. The top of the absorbent cone shell 11 is provided with a baffle cylinder 14 and the bottom is provided with an absorbent opening 12. The absorbent opening 12 is provided with a rotating suction cap 13. The negative pressure mechanism 50 continuously generates negative pressure by communicating with the baffle cylinder 14.

[0033] The flux removal box 20 includes a flux removal cone shell 21, a flux suction cone shell 11 and a flux removal cone shell 21 connected end to end, a flux removal opening 22 is provided at the bottom of the flux removal cone shell 21, and a rotating discharge cover 23 is provided at the flux removal opening 22.

[0034] When in the suction mode with the rotary suction cap 13 closed and the rotary unloading cap 23 open, the negative pressure suction 10 continuously draws the flux into it to achieve automatic suction. When in the unloading mode with the rotary unloading cap 23 closed and the rotary suction cap 13 open, the flux of the negative pressure suction 10 can still be automatically unloaded into the flux unloading box 20 without stopping the negative pressure mechanism 50.

[0035] The switching cylinder 30 includes a cavity 31, a piston 32, and a control cylinder 33. The cavity 31 is connected to the suction cone 11 and the discharge cone 21 via a suction pipe 34 and a discharge pipe 35, respectively. The discharge pipe 35 has a vent 36 on one side. The opening of the cavity 31 connecting to the discharge pipe 35 is located between the vent 36 and the opening of the cavity 31 connecting to the suction pipe 34. The annular part of the cavity 31 between the vent 36 and the opening of the discharge pipe is the atmospheric connection section A. The annular part of the cavity 31 between the opening of the discharge pipe and the opening of the suction pipe 34 is the negative pressure connection section B. The piston 32 switches between the atmospheric connection section A and the negative pressure connection section B once every time interval t, which, together with the negative pressure mechanism 14, realizes the automatic switching between the suction mode and the discharge mode.

[0036] It also includes a timing module 40, which includes a clock 41 and a trigger switch 42. The trigger switch 42 is connected to the control cylinder 33. Every time interval t, the trigger switch 42 closes, which powers the control cylinder 33 and triggers a switching action of the switching cylinder 30. After completion, the trigger switch 42 opens, and at the same time, the clock 41 returns to zero.

[0037] The negative pressure suction 10 has a suction port 15 on its side wall, which is horizontally opposite to the baffle cylinder 14. The suction port 15 is connected to a suction hose 16, and the end of the suction hose 16 is connected to a negative pressure suction nozzle 17. The baffle cylinder 14 has an opening at the top and a filter screen 18 at the bottom. The filter screen 18 is roughly aligned with the bottom of the opening of the suction pipe 34, so that only air can pass through the filter screen 18, while the flux is blocked by the wall of the baffle cylinder 14 and falls to the lower part of the suction cone shell 11. The time interval t is equal to the time required for the flux to fill the suction cone shell 11 and reach the filter screen 18.

[0038] In the suction mode, piston 32 is located in atmospheric connection section A. Discharge cone 21 is connected to atmospheric pressure through discharge pipe 34, shell cavity 31 and atmospheric port 35. Rotary discharge cap 23 is opened. Negative pressure mechanism 50 generates negative pressure in suction cone 11, forcing rotary valve cover 13 to close, thus achieving continuous suction of flux. In the discharge mode, when piston 32 switches to negative pressure connection section B, suction cone 21 is connected to flux discharge shell 21 through suction pipe 33, shell cavity 31 and discharge pipe 34, so that both shells are under negative pressure, thereby causing rotary discharge cap 23 to close. Rotary suction cap 13 opens automatically due to the weight of flux, and flux falls from suction cone 11 to discharge cone 21.

[0039] The negative pressure mechanism 50 includes a negative pressure capillary tube 51, an expanding pipe 52, an axial flow fan 53, and a guide air mechanism 54. The negative pressure capillary tube 51 is located in the vent section 56, which is sealed within the transition sleeve 55. The air inlet of the transition sleeve 55 connects to the top opening of the baffle cylinder 14. One end of the negative pressure capillary tube 51 is open, and the other end is connected to the expanding pipe 52. The other end of the expanding pipe 52 is connected to the air inlet of the guide air mechanism 54. The guide air mechanism 54 includes a top plate, a bottom plate, and guide plates 58 spaced apart between the top plate and the bottom plate. The radial channel between the guide plates 58 forms an air outlet channel 59. A cylindrical cavity 59 is formed inside the guide plates 58. The axial flow fan 53 is fixed on the top plate, and the impeller is located inside the cylindrical cavity. An air inlet is provided on the bottom plate directly opposite the bottom of the cylindrical cavity. Air enters the air inlet of the guide air mechanism 54 from the negative pressure capillary tube 51 through the expanding pipe 52 and is blown out from the air outlet channel 59. The negative pressure mechanism 50 also includes a vibration-absorbing support. The base plate of the air guide structure 54 has multiple pillars, and the vibration-absorbing support has multiple vibration-absorbing holes corresponding to the pillars. Vibration-absorbing rubber pads are installed inside the vibration-absorbing holes. Due to the weight of the air guide structure 54, it is inserted into the vibration-absorbing holes through the pillars and presses against the rubber pads, thus fixing the base plate of the air guide structure 54 and the top of the vibration-absorbing support with a gap. The housing has a grille corresponding to the air outlet duct 59 to connect to the atmospheric environment.

[0040] More preferably, the expansion pipe 52 is a right-angle bend, and the expansion pipe 52 changes from horizontal to vertical upward.

[0041] A sound-absorbing structure 60 is provided directly opposite the air outlet duct. The sound-absorbing structure 60 includes an annular cover 61 and a dome-shaped spherical cover 62. The inner wall of the annular cover 61 is provided with a porous sound-absorbing pad 63, and the inner wall of the dome-shaped spherical cover 62 is provided with a high-porosity sound-absorbing and venting pad 64 with large channels. The dome-shaped spherical cover 62 is provided with multiple exhaust holes 65 at intervals. The outer surface of the porous sound-absorbing pad 63 is provided with multiple wavy concave areas 66, and the inner surface is provided with multiple conical concave areas 67 at intervals. The crest lines 68 between the wavy concave areas 66 bond the annular cover 61 and the dome-shaped spherical cover 62.

[0042] The suction cone 11 and the discharge cone 21 are connected end to end as follows: the top of the discharge cone 21 is provided with a positioning seat 24, and the positioning seat 24 is provided with a conical hole corresponding to the suction cone 11 and a mating hole 25 corresponding to the suction opening 12. A sealing ring 26 is provided between the suction opening 12 and the mating hole 25. The discharge opening is connected to the discharge pipe 27.

[0043] The unloading pipe 27 connects to the storage cone 80 at both ends. The bottom of the storage cone 80 is connected to the supply pipe 81, which discharges the flux contained in the storage cone 80 to the welding position by natural descent. Furthermore, a manual valve 82 capable of being closed to an airtight state is provided in the middle of the supply pipe 81 to prevent flux from falling when operation stops. A heater 83 is provided in a planar engagement with the inclined wall of the storage cone 80, and the heater 83 heats the partition wall of the storage cone. Preferably, the heater 83 can be set to any heating temperature using a temperature setting controller (not shown) so that the storage cone can be heated according to the temperature of the external gas.

[0044] Example 2

[0045] The dust collection structure 70 is added, the position of the negative pressure mechanism 50 is changed, and the other structures are the same as in Example 1. Only the different parts are described.

[0046] A flux recovery device for spiral welded pipes, further comprising:

[0047] A dust-collecting structure 70 is arranged side-by-side beside the absorbent cone 11 and communicates with it through a connecting channel 72. The dust-collecting structure 70 includes a dust-collecting cone 71 and a connecting channel 72. Multiple filters 73 are provided opposite the connecting channel 72 to capture dust while allowing only air to pass through. At the bottom of the dust-collecting cone 71, a manual valve 75, capable of being closed to an airtight state, is connected via a discharge pipe 74. The manual valve 75 is used to discharge the dust contained in the dust-collecting cone 71 and to stop the discharge process.

[0048] The dust that flows into the suction cone 11 along with the flux has a very low specific gravity. Therefore, while floating in the suction cone 11, it travels through the connecting channel 72 into the dust collection cone 71 along with the airflow.

[0049] The top of the dust collection cone 71 is connected to the negative pressure tube 51 of the negative pressure mechanism 50 via a transition sleeve 55. The filter screen 18 of the baffle cylinder 14 at the top of the absorbent cone 11 can be replaced with a solid plate or the baffle cylinder 14 can be replaced with a baffle plate 19.

[0050] A flux recovery device for spiral welded pipes is provided. The negative pressure flux suction 10 and the flux unloading box 20 work together to achieve automated continuous suction and intermittent unloading. The flux is heated in the storage cone 80 and continuously falls to the welding position. The suction flux is also removed by the dust collection structure 70. It is simple, reliable and has great practical value.

Claims

1. A flux recovery device for spiral welded pipes, characterized in that, include The negative pressure suction agent (10) includes a suction cone shell (11) and a negative pressure mechanism (50). The suction cone shell (11) is provided with a baffle cylinder (14) at the top and a suction opening (12) at the bottom. The suction opening (12) is provided with a rotating suction cap (13). The negative pressure mechanism (50) is connected to the baffle cylinder (14) to continuously generate negative pressure. The flux removal box (20) includes a flux removal cone shell (21), the flux suction cone shell (11) and the flux removal cone shell (21) are connected end to end, the bottom of the flux removal cone shell (21) is provided with a flux removal opening (22), and the flux removal opening (22) is provided with a rotating cap (23); When in the suction mode with the rotary suction cap (13) closed and the rotary unloading cap (23) open, the negative pressure suction agent (10) continuously draws the flux into it by the negative pressure to achieve automatic suction; when in the unloading mode with the rotary unloading cap (23) closed and the rotary suction cap (13) open, the flux of the negative pressure suction agent (10) can still be automatically unloaded into the flux unloading box (20) without stopping the negative pressure mechanism (50); The switching cylinder (30) works in conjunction with the negative pressure mechanism (50) to achieve automatic switching between the suction mode and the discharge mode.

2. The spiral welded pipe flux recovery device as described in claim 1, characterized in that, The switching cylinder (30) includes a shell cavity (31), a piston (32), and a control cylinder (33). The shell cavity (31) is connected to the suction cone shell (11) and the discharge cone shell (21) through the suction pipe (34) and the discharge pipe (35) respectively. The discharge pipe (35) is provided with an air vent (36) on one side. The opening of the shell cavity (31) connected to the discharge pipe (35) is located between the air vent (36) and the opening of the shell cavity (31) connected to the suction pipe (34). The annular part of the shell cavity (31) between the air vent (36) and the opening of the discharge pipe is called the atmospheric connection section A. The annular part of the shell cavity (31) between the opening of the discharge pipe and the opening of the suction pipe (34) is called the negative pressure connection section B. The piston (32) switches between the atmospheric connection section A and the negative pressure connection section B once every time interval t.

3. The spiral welded pipe flux recovery device as described in claim 1, characterized in that, It also includes a timing module (40), which triggers the switching action of the switching cylinder (30) every time interval t, while the timing module (40) resets to zero.

4. The spiral welded pipe flux recovery device as described in claim 1, characterized in that, The timing module (40) includes a clock (41) and a trigger switch (42). The trigger switch (42) is connected to the control cylinder (33). When the trigger switch (42) is closed, the control cylinder (33) is energized and triggers a switching action of the switching cylinder (30). After completion, the trigger switch (42) is opened, and at the same time, the clock (41) is reset to zero.

5. A flux recovery device for spiral welded pipes as described in claim 1, characterized in that, The negative pressure mechanism (50) includes a negative pressure capillary tube (51), an expansion tube (52), an axial flow fan (53), and a guide air mechanism (54). The negative pressure capillary tube (51) is provided with a vent section (56), which is sealed inside the transition sleeve (55). The air inlet of the transition sleeve (55) is connected to the top opening of the baffle cylinder (14).

6. The spiral welded pipe flux recovery device as described in claim 5, characterized in that, The axial flow fan and air guide of the negative pressure mechanism are installed in the sound absorption structure (60). The sound absorption structure (60) includes an annular cover (61) and a dome spherical cover (62). The inner wall of the annular cover (61) is provided with a porous sound-absorbing pad (63). The inner wall of the dome spherical cover (62) is provided with a sound-absorbing and venting pad (64) with a large channel and high porosity. The dome spherical cover (62) is provided with multiple exhaust holes (65) at intervals.

7. The spiral welded pipe flux recovery device as described in claim 6, characterized in that, It also includes a dust collection structure (70), which is arranged side by side on the side of the absorbent cone shell (11) and connected to it through a connecting channel (72); the dust collection structure (70) includes a dust collection cone shell (71) and a connecting channel (72), and a plurality of filters (73) are provided opposite to the connecting channel (72) to capture dust and allow only air to pass through, and the top of the dust collection cone shell (71) is connected to a negative pressure mechanism (50).

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