CN217832548U - Welding tool for welding sheet in pipe - Google Patents
Welding tool for welding sheet in pipe Download PDFInfo
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- CN217832548U CN217832548U CN202221979861.5U CN202221979861U CN217832548U CN 217832548 U CN217832548 U CN 217832548U CN 202221979861 U CN202221979861 U CN 202221979861U CN 217832548 U CN217832548 U CN 217832548U
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Abstract
The utility model discloses an in-pipe welding sheet welding tool, which comprises at least one group of positioning mechanisms, wherein each group of positioning mechanisms comprises a supporting plate, a plurality of positioning fixture blocks are detachably connected on the supporting plate, and each positioning fixture block is provided with a bayonet for clamping a pipe fitting to be welded; the upper end of the supporting rod is suspended and can be used for sleeving the pipe fitting to be welded from top to bottom; the supporting rod is connected with a supporting seat capable of moving along the axial direction of the supporting rod, the top of the supporting seat is abutted against the lower end of the pipe fitting to be welded, and the depth of the upper end of the supporting rod extending into the pipe fitting to be welded can be adjusted when the supporting seat moves along the axial direction of the supporting rod; and the pressing mechanism is connected to the supporting plate on one side of the positioning clamping block, and a first pressing rod capable of pressing and positioning the pipe fitting to be welded in the clamping opening is connected to the pressing mechanism. The welding tool for the welding sheet in the pipe is suitable for pipe fittings with different shapes and lengths, has strong universality, and is simple, convenient and labor-saving to operate when the welding tool is replaced.
Description
Technical Field
The utility model relates to a furniture welding equipment technical field specifically says a welding frock of in-pipe welding piece.
Background
The leg tubes and the cross beams of the existing steel furniture such as lifting learning tables, lifting beds for children, lifting goods shelves and the like are all formed by cutting metal pipe fittings. In order to improve the mechanical strength of the pipe and prevent the pipe from deforming, a connecting piece matched with the shape of the inner hole of the pipe is generally arranged at one end of the inner hole of the pipe, and the connecting piece is welded and fixed with the inner wall of the pipe. When the connecting piece is welded with the inner wall of the pipe fitting, the pipe fitting to be welded is generally placed on a welding tool and then positioned and fixed, so that the pipe fitting is not deviated in the welding process, and the welding precision of the connecting piece meets the technical requirement. Its structure of weldment work of the intraductal welding piece of prior art includes the base, and the support of vertical connection on the base, and the top of support is connected with and compresses tightly the cylinder, and is equipped with the base that supplies the pipe fitting lower extreme to place and fix a position on the base, treats that the vertical placing of welded pipe fitting is on the base, then compresses tightly the piston rod free end of cylinder and compresses tightly the pipe fitting top downwards to the realization is treated the location of welded pipe fitting on welding frock and is fixed.
Different consumers have different requirements on the styles of furniture, so that the shapes of the pipe fittings used by the furniture with different styles are different, for example, circular pipe fittings with circular cross sections, oval pipe fittings with oval cross sections, square pipes with square cross sections and the like are used, the diameters and the lengths of the pipe fittings are different, and the types of the pipe fittings are various. In the welding tool for the welding sheet in the pipe in the prior art, a special welding tool needs to be manufactured for welding each pipe fitting, so that the universality is poor, and the manufacturing cost is increased; moreover, the number of welding tools is large, so that the welding tools occupy a large floor area during storage, and are inconvenient to store; moreover, the welding tool is heavy, so that time and labor are wasted when the welding tool is replaced. In addition, different types of pipe fittings have different welding depths of the connecting sheet in the pipe fittings, and the operation is troublesome when the height of the connecting sheet is adjusted.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is, overcome the defect of above prior art, provide one kind and be fit for different shapes and length pipe fitting, the commonality is strong, when changing welding frock, easy operation, convenient, laborsaving intraductal welding piece welding frock.
The technical solution of the utility model is that, a welding frock of intraductal welding piece with following structure is provided: it includes base and at least a set of positioning mechanism that supplies to wait to weld the pipe fitting installation of connecting on the base, every set of positioning mechanism includes
The device comprises a base, a supporting plate, a plurality of positioning clamping blocks and a plurality of positioning clamping blocks, wherein the supporting plate is vertically arranged and connected to the base;
the lower end of the supporting rod is connected to the base, and the upper end of the supporting rod is suspended and can be used for sleeving a pipe fitting to be welded from top to bottom; the supporting rod is connected with a supporting seat capable of moving along the axial direction of the supporting rod, the top of the supporting seat is abutted against the lower end of the pipe fitting to be welded, and the depth of the upper end of the supporting rod extending into the pipe fitting to be welded can be adjusted when the supporting seat moves along the axial direction of the supporting rod;
and the pressing mechanism is connected to the supporting plate on one side of the positioning clamping block, and a first pressing rod capable of pressing and positioning the pipe fitting to be welded in the clamping opening is connected to the pressing mechanism.
Preferably, the supporting plate is provided with a plurality of inserting grooves distributed along the height direction of the supporting plate, the positioning fixture block is provided with an inserting head which is matched and inserted with the inserting grooves, and the inserting head is movably inserted in the inserting grooves.
Preferably, the compressing mechanism is a first compressing cylinder, the middle part of the first compression bar is hinged to the supporting plate, and the free end of a piston rod of the first compressing cylinder is connected with the first end of the first compression bar and used for driving the first compression bar to rotate so that the second end of the first compression bar compresses or separates from the outer side wall of the pipe fitting to be welded.
Preferably, the upper end of the supporting rod is connected with a reference block, and when the reference block extends into the pipe fitting to be welded, the top of the reference block can be used for placing a welding sheet in the pipe fitting to be welded.
Preferably, the top of the supporting plate is connected with a second pressing cylinder, and the top of the supporting plate is rotatably connected with a second pressing rod; and the free end of a piston rod of the second pressing cylinder is connected with the first end of the second pressing rod and used for driving the second pressing rod to rotate so that the second end of the second pressing rod is pressed or separated from a welding sheet in the pipe fitting to be welded.
Preferably, a third pressing cylinder is connected to the outer side wall of the top of the supporting plate, and a pressing plate which can transversely move along the pipe to be welded and can press the outer side wall of the pipe to be welded is connected to the third pressing cylinder.
Preferably, the supporting rod is provided with an external thread, the supporting seat is provided with a central hole, and the inner wall of the central hole is provided with an internal thread which is matched with the external thread on the supporting rod and is in threaded connection; the supporting seat is in threaded connection with the supporting rod, and the depth of the upper end of the supporting rod extending into the pipe fitting to be welded can be adjusted when the supporting seat rotates circumferentially around the axis of the supporting rod.
Preferably, the support seat is provided with a long hole which radially penetrates through the central hole, the long hole penetrates through the top and the bottom of the support seat, and the outer end of the long hole penetrates through the outer side wall of the support seat; the long hole is used for dividing the supporting seat into two single bodies which can rotate around the inner end of the long hole in opposite directions to approach each other, and a locking screw is connected between the two single bodies; when the locking screw is in a locking state, the two single bodies clamp the supporting rod, and the supporting seat is fixed relative to the supporting rod; the locking screw is in the release state, two monomers loosen the bracing piece, the supporting seat can be around the axis circumferential direction of bracing piece with height-adjusting.
After the structure more than adopting, the utility model relates to an intraductal welding piece welding frock compares with prior art, has following advantage: when the welding tool for the welding sheet in the pipe is used for welding, a pipe fitting to be welded is sleeved on a vertically arranged supporting rod from top to bottom, and the position of a supporting seat on the supporting rod is adjusted, so that the depth of the upper end of the supporting rod extending into the pipe fitting to be welded is adjusted to determine the position of the welding sheet in the pipe fitting to be welded; at the moment, the pipe fitting to be welded is clamped in the bayonet of the positioning fixture block and is pressed by a first pressing rod of the pressing mechanism; treat welding pipe fitting welding in different shapes or sizes, only need dismantle fixture block get off, change with treat the fixture block of the bayonet socket of welding pipe fitting shape or size looks adaptation can, need not change whole welding frock, thereby make the easy operation of changing welding frock, and it is convenient, laborsaving, and this welding frock, the position of adjustable supporting seat on the bracing piece, thereby adjust the bracing piece upper end and stretch into the degree of depth of treating in the welding pipe fitting, thereby make this welding frock be fit for the welding of treating the welding piece of welding pipe fitting of different length, the commonality is strong. Moreover, the manufacturing cost of the positioning clamping block is low, so that the production cost can be saved.
Secondly, when the upper end of the supporting rod extends into the pipe fitting to be welded, the reference block is used for placing a welding sheet which can be kept fixed under the action of a second pressure rod of a second pressing cylinder, so that the welding is convenient, and the welding quality is improved; the third compresses tightly the cylinder setting and can fix the upper end of treating the welding pipe fitting at the backup pad top to further guaranteed the stability of welding piece when the welding, improved welding quality.
In addition, the supporting seat can be installed on the supporting rod in a threaded connection mode, when the height position of the supporting seat is adjusted, the supporting seat only needs to be rotated, and the operation is simple and convenient. The support seat is divided into two single bodies which can oppositely rotate around the inner ends of the elongated holes and approach each other by the arrangement of the elongated holes on the support seat, the two single bodies are locked or released by locking screws, when the locking screws are in a locked state, the two single bodies clamp the support rod, and the support seat is fixed relative to the support rod; when the locking screws are in a releasing state, the two single bodies loosen the supporting rod, and the supporting seat can rotate circumferentially around the axis of the supporting rod to adjust the height. Set up like this and make the bearing capacity of supporting seat stronger, avoid in welding process, the supporting seat gliding causes the not high defect of welding quality of welding piece.
Drawings
Fig. 1 is a schematic structural view of the welding tool for welding the welding sheet in the pipe of the present invention.
Fig. 2 is another angle structure diagram of the welding tool for welding the welding sheet in the pipe of the present invention.
Fig. 3 is a schematic diagram of a welding state structure of the welding tool for welding the welding sheet in the pipe.
Fig. 4 is a schematic diagram of a pipe to be welded of the welding tool of the in-pipe welding tab of the present invention.
Fig. 5 is a schematic diagram of the positioning fixture block of the welding fixture for welding the welding sheet in the pipe of the utility model.
Fig. 6 is a schematic view of a support seat of the welding tool for welding the welding sheet in the pipe of the present invention.
Fig. 7 is a schematic view of a combined state structure of the welding tool for welding the welding sheet in the pipe according to the present invention.
As shown in the figure:
1. the base, 2, the backup pad, 3, the bracing piece, 300, the reference block, 4, the supporting seat, 400, the centre bore, 401, the elongated hole, 402, locking screw, 5, the location fixture block, 500, the bayonet socket, 501, the bayonet joint, 6, first pressure cylinder, 600, first depression bar, 7, the second compresses tightly the cylinder, 700, the second depression bar, 8, the third compresses tightly the cylinder, 800, the clamp plate, 801, the extension board, 9, treat welded pipe spare, 900, the soldering lug.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1 to 6;
the embodiment of the utility model discloses welding sheet welding frock in the pipe, it is used for the welding of welding sheet 900 in the metal pipe fitting, after the metal pipe fitting is cut and shaped, because of the structural need or improve the mechanical strength of pipe fitting, weld welding sheet 900 on the inner wall of one end of pipe fitting, therefore treat that welded pipe fitting 9 is when the welding, need to wait to weld pipe fitting 9 and fix or clamp on welding sheet 900 welding frock in the pipe and weld; the welding tool for the welding sheet 900 in the pipe structurally comprises a base 1 and at least one group of positioning mechanisms connected to the base 1 and used for installing a pipe 9 to be welded, wherein each group of positioning mechanisms comprises a vertically arranged supporting plate 2 connected to the base 1, a plurality of positioning fixture blocks 5 distributed along the height direction of the supporting plate 2 are detachably connected to the supporting plate 2, each positioning fixture block 5 is provided with a bayonet 500 for clamping the pipe 9 to be welded, and the shape of the bayonet 500 is matched with the shape of the outer side wall of the pipe 9 to be welded; in this embodiment, the supporting plate 2 is provided with a plurality of inserting grooves distributed along the height direction of the supporting plate 2, the positioning fixture block 5 is provided with an inserting head 501 matched with and inserted into the inserting grooves, and the inserting head 501 is movably inserted into the inserting grooves. In order to stabilize the positioning fixture 5 and the insertion groove on the supporting plate 2, a screw may be disposed on the insertion head 501, and when the insertion head 501 is inserted into the insertion groove, the insertion head 501 may be fixed on the supporting plate 2 by the screw. The welding tool for the welding sheet in the pipe also comprises a supporting rod 3 which is vertically arranged, the lower end of the supporting rod 3 is connected to the base 1, and the upper end of the supporting rod 3 is suspended and can be used for sleeving a pipe fitting 9 to be welded from top to bottom; the supporting rod 3 is connected with a supporting seat 4 capable of moving along the axial direction of the supporting rod 3, the top of the supporting seat 4 is abutted against the lower end of the pipe fitting 9 to be welded, and the depth of the upper end of the supporting rod 3 extending into the pipe fitting 9 to be welded can be adjusted when the supporting seat 4 moves along the axial direction of the supporting rod 3; the welding tool for the welding of the welding sheet in the pipe further comprises at least one pressing mechanism, the pressing mechanism is connected to the supporting plate 2 on one side of the positioning clamping block 5, and the pressing mechanism is connected with a first pressing rod 600 capable of pressing and positioning a pipe fitting 9 to be welded in the bayonet 500. In this embodiment, three positioning fixture blocks 5 are connected to the supporting plate 2 in the height direction, and at least two pressing mechanisms are provided, where the pressing mechanism is a first pressing cylinder 6 in this embodiment, the middle portion of the first pressing rod 600 is hinged to the supporting plate 2, and the free end of the piston rod of the first pressing cylinder 6 is connected to the first end of the first pressing rod 600, and is configured to drive the first pressing rod 600 to rotate, so that the second end of the first pressing rod 600 presses or is separated from the outer side wall of the pipe 9 to be welded. When the first pressing cylinder 6 is connected with an air source to act, the piston rod is driven to extend out, so that the first pressing rod 600 is driven to rotate, the second end of the first pressing rod 600 is pressed on the outer side wall of the pipe 9 to be welded, and the pipe 9 to be welded is fixed. In other embodiments, the first pressing cylinder 6 may also be an oil cylinder, a push rod motor, or the like.
When the welding tool for the welding sheet in the pipe is used for welding, the pipe fitting 9 to be welded is sleeved on the vertically arranged support rod 3 from top to bottom, and the position of the support seat 4 on the support rod 3 is adjusted, so that the depth of the upper end of the support rod 3 extending into the pipe fitting 9 to be welded is adjusted to determine the position of the welding sheet 900 in the pipe fitting 9 to be welded; at the moment, the pipe fitting 9 to be welded is clamped in the bayonet 500 of the positioning fixture block 5 and is pressed by the first pressing rod 600 of the pressing mechanism; treat welding pipe 9 welding time at different shapes or sizes, only need to dismantle fixture block 5 get off, change with treat welding pipe 9 shape or the fixture block 5 of the bayonet socket 500 of size looks adaptation can, need not change whole welding frock, thereby make the easy operation of changing welding frock, and it is convenient, laborsaving, and this welding frock, adjustable supporting seat 4 is in the position on bracing piece 3, thereby adjust 3 upper ends of bracing piece and stretch into the degree of depth of treating in the welding pipe 9, thereby make this welding frock be fit for the welding of treating the soldering lug 900 of welding pipe 9 of different length, therefore, the commonality is strong. Moreover, the manufacturing cost of the positioning fixture block 5 is low, so that the production cost can be saved.
In this embodiment, the cross section of the bayonet 500 of the positioning fixture block 5 is square, and the width and depth of the bayonet 500 can be set according to the actual pipe 9 to be welded; in other embodiments, the cross section of the bayonet 500 may be configured in a semicircular shape to fit a circular pipe 9 to be welded, or in a semi-elliptical shape to fit an elliptical pipe 9 to be welded.
Referring again to fig. 1, the upper end of the supporting rod 3 is connected to a reference block 300, and when the reference block 300 extends into the pipe 9 to be welded, the top of the reference block 300 can be used for placing a welding sheet 900 in the pipe 9 to be welded. That is, when the welding sheet 900 is welded and the upper end of the support rod 3 extends into the pipe 9 to be welded, the welding sheet 900 is placed on the top of the reference block 300, and the position of the support seat 4 on the support rod 3 is adjusted, so that the position of the welding sheet 900 in the pipe 9 to be welded is adjusted; in order to ensure that the position of the welding sheet 900 is unchanged during welding, the top of the support plate 2 is connected with a second pressing cylinder 7, and the top of the support plate 2 is rotatably connected with a second pressing rod 700; the free end of the piston rod of the second pressing cylinder 7 is connected with the first end of the second pressing rod 700, and is used for driving the second pressing rod 700 to rotate so that the second end of the second pressing rod 700 presses or separates from the welding sheet 900 in the pipe fitting 9 to be welded. Further, a horizontally arranged support plate 801 is connected to the outer side wall of the top of the support plate 2, a third pressing cylinder 8 is mounted on the support plate 801, and a pressing plate 800 which can transversely move along the pipe 9 to be welded and can press the outer side wall of the pipe 9 to be welded is connected to the third pressing cylinder 8. Therefore, the stability of the welding sheet 900 during welding is further ensured, and the welding quality is improved.
In this embodiment, the supporting rod 3 is provided with an external thread, the supporting seat 4 is provided with a central hole 400, and the inner wall of the central hole 400 is provided with an internal thread which is matched with the external thread on the supporting rod 3 and is in threaded connection; supporting seat 4 and 3 threaded connection of bracing piece, and when supporting seat 4 around 3 axis circumferential direction of bracing piece, the degree of depth in the 3 upper ends of adjustable bracing piece stretched into the pipe fitting 9 that treats welding. When the height position of the supporting seat 4 is adjusted, the supporting seat 4 only needs to be rotated, and the operation is simple and convenient. In order to prevent the support seat 4 from sliding downwards due to thread abrasion, a long hole 401 radially penetrating through the central hole 400 is arranged on the support seat 4, the long hole 401 penetrates through the top and the bottom of the support seat 4, and the outer end of the long hole 401 penetrates through the outer side wall of the support seat 4; the long hole 401 is used for dividing the support seat 4 into two single bodies which can rotate oppositely and approach to each other around the inner end of the long hole 401, and a locking screw 402 is connected between the two single bodies; when the locking screw 402 is in a locking state, the two single bodies clamp the support rod 3, and the support seat 4 is fixed relative to the support rod 3; when the locking screw 402 is in a release state, the two single bodies loosen the support rod 3, and the support seat 4 can rotate circumferentially around the axis of the support rod 3 to adjust the height. The bearing capacity of the supporting seat 4 is stronger, and the defect that the welding quality of the welding sheet 900 is not high due to the fact that the supporting seat 4 slides downwards in the welding process is avoided.
Referring to fig. 7, in order to improve the welding efficiency, a plurality of welding tools are connected to the base 1, each welding tool is independently arranged, and when one welding tool needs to replace the positioning fixture block 5, normal use of the other welding tools is not affected.
In this embodiment, the first compressing cylinder 6, the second compressing cylinder 7 and the third compressing cylinder 8 all need to be connected with an air source to work, the first compressing cylinder 6, the second compressing cylinder 7 and the third compressing cylinder 8 all adopt the prior art, and the first compressing cylinder 6, the second compressing cylinder 7 and the third compressing cylinder 8 can be replaced by oil cylinders, push rod motors and the like; this embodiment will not be described in detail.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. The utility model provides an intraductal welding piece welding frock, it includes the base and connects the positioning mechanism of at least a set of confession on the base to wait to weld the pipe fitting installation, its characterized in that: each group of positioning mechanisms comprises
The device comprises a base, a supporting plate, a plurality of positioning clamping blocks and a plurality of positioning clamping blocks, wherein the supporting plate is vertically arranged and connected to the base;
the lower end of the supporting rod is connected to the base, and the upper end of the supporting rod is suspended and can be used for sleeving a pipe fitting to be welded from top to bottom; the supporting rod is connected with a supporting seat capable of moving along the axial direction of the supporting rod, the top of the supporting seat is abutted against the lower end of the pipe fitting to be welded, and the depth of the upper end of the supporting rod extending into the pipe fitting to be welded can be adjusted when the supporting seat moves along the axial direction of the supporting rod;
and the pressing mechanism is connected to the supporting plate on one side of the positioning clamping block, and a first pressing rod capable of pressing and positioning the pipe fitting to be welded in the clamping opening is connected to the pressing mechanism.
2. The welding tool for the welding sheet in the pipe according to claim 1, wherein: the supporting plate is provided with a plurality of inserting grooves distributed along the height direction of the supporting plate, the positioning fixture block is provided with a plug-in connector which is matched with the inserting grooves in an inserting mode, and the plug-in connector is movably inserted into the inserting grooves.
3. The welding tool for welding the welding sheet in the pipe as claimed in claim 1, wherein: the pressing mechanism is a first pressing cylinder, the middle part of the first pressing rod is hinged to the supporting plate, and the free end of a piston rod of the first pressing cylinder is connected with the first end of the first pressing rod and used for driving the first pressing rod to rotate so that the second end of the first pressing rod is pressed or separated from the outer side wall of the pipe fitting to be welded.
4. The welding tool for the welding sheet in the pipe according to claim 1, wherein: the upper end of the supporting rod is connected with a reference block, and when the reference block extends into a pipe fitting to be welded, the top of the reference block can be used for placing a welding sheet in the pipe fitting to be welded.
5. The welding tool for the welding sheet in the pipe according to claim 4, wherein: the top of the supporting plate is connected with a second pressing cylinder, and the top of the supporting plate is rotatably connected with a second pressing rod; and the free end of a piston rod of the second pressing cylinder is connected with the first end of the second pressing rod and used for driving the second pressing rod to rotate so that the second end of the second pressing rod is pressed or separated from a welding sheet in the pipe fitting to be welded.
6. The welding tool for the welding sheet in the pipe according to claim 5, wherein: and the outer side wall of the top of the supporting plate is connected with a third pressing cylinder, and the third pressing cylinder is connected with a pressing plate which can transversely move along the pipe to be welded and can press the outer side wall of the pipe to be welded.
7. The welding tool for welding the welding sheet in the pipe as claimed in claim 1, wherein: the supporting rod is provided with external threads, the supporting seat is provided with a central hole, and the inner wall of the central hole is provided with internal threads which are matched with the external threads on the supporting rod and in threaded connection; the supporting seat is in threaded connection with the supporting rod, and the depth of the upper end of the supporting rod extending into the pipe fitting to be welded can be adjusted when the supporting seat rotates circumferentially around the axis of the supporting rod.
8. The welding tool for the welding sheet in the pipe according to claim 7, wherein: the supporting seat is provided with a long hole which radially penetrates through the central hole, the long hole penetrates through the top and the bottom of the supporting seat, and the outer end of the long hole penetrates through the outer side wall of the supporting seat; the long hole is used for dividing the supporting seat into two single bodies which can rotate around the inner end of the long hole in opposite directions and are close to each other, and a locking screw is connected between the two single bodies; when the locking screw is in a locking state, the two single bodies clamp the supporting rod, and the supporting seat is fixed relative to the supporting rod; the locking screw is in the release state, two monomers loosen the bracing piece, the supporting seat can be around the axis circumferential direction of bracing piece with height-adjusting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221979861.5U CN217832548U (en) | 2022-07-27 | 2022-07-27 | Welding tool for welding sheet in pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221979861.5U CN217832548U (en) | 2022-07-27 | 2022-07-27 | Welding tool for welding sheet in pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217832548U true CN217832548U (en) | 2022-11-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221979861.5U Active CN217832548U (en) | 2022-07-27 | 2022-07-27 | Welding tool for welding sheet in pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217832548U (en) |
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2022
- 2022-07-27 CN CN202221979861.5U patent/CN217832548U/en active Active
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