CN113351701A - Device and method for machining clip-shaped pipe - Google Patents

Device and method for machining clip-shaped pipe Download PDF

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Publication number
CN113351701A
CN113351701A CN202110639756.0A CN202110639756A CN113351701A CN 113351701 A CN113351701 A CN 113351701A CN 202110639756 A CN202110639756 A CN 202110639756A CN 113351701 A CN113351701 A CN 113351701A
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CN
China
Prior art keywords
cross
pipe
processing apparatus
fixedly connected
cushion
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Granted
Application number
CN202110639756.0A
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Chinese (zh)
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CN113351701B (en
Inventor
姜睿泓
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Foshan Nanhai Guangmei Stainless Steel Co ltd
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Individual
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Priority to CN202110639756.0A priority Critical patent/CN113351701B/en
Publication of CN113351701A publication Critical patent/CN113351701A/en
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Publication of CN113351701B publication Critical patent/CN113351701B/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D7/00Bending rods, profiles, or tubes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D7/00Bending rods, profiles, or tubes
    • B21D7/16Auxiliary equipment, e.g. for heating or cooling of bends
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

Abstract

The invention relates to the field of processing of a clip pipe, in particular to a clip pipe processing device and a clip pipe processing method. A processing device for a clip-shaped pipe comprises a cross, an inserting frame and upper and lower cushion rods, wherein the upper and lower ends of the cross are provided with the upper and lower cushion rods, and the center of the cross is provided with the inserting frame. The cross is characterized by further comprising a left pad rod and a right pad rod, wherein the left end and the right end of the cross are fixedly connected with the left pad rod and the right pad rod respectively. The cross is fixedly connected with two connecting strips, and the inserting frame is fixedly connected to the two connecting strips. The left side connecting strip and the left and right cushion rods are fixedly connected with a limiting column; and a limiting column is fixedly connected between the connecting strip on the right side and the left and right cushion rods. The method comprises the following steps: (A) the four bars are respectively arranged on the inner sides of the outer rectangular tubes; (B) the four cushion strips are respectively arranged at the four strip rods; (C) installing an inner rectangular pipe between the four filler strips; (D) and blocking pieces are arranged at two ends of each bar.

Description

Device and method for machining clip-shaped pipe
Technical Field
The invention relates to the field of processing of a clip pipe, in particular to a clip pipe processing device and a clip pipe processing method.
Background
The invention discloses a robot pipe bending method and a pipe bending device with patent number 202010560608.5, and discloses the robot pipe bending method, which relates to the technical field of pipe bending and comprises the following steps: s1, establishing a user coordinate system, wherein the origin of the user coordinate system is located at the top end of the bent pipe, the Z-axis direction of the user coordinate system is vertical upwards, and the Y-axis direction of the user coordinate system faces the inner side direction of the bent pipe; s2, the robot holds the head of the bent pipe, the robot is arranged at the top end of the bent pipe, the robot is kept fixed, and a robot tool coordinate system is calculated; s3, importing the digital and analog data into a bent pipe parameter model and a robot motion model, establishing a robot bent pipe machining path, and generating a robot bent pipe machining program; and S4, executing a robot pipe bending program by the robot. The device has high utilization rate of equipment and high processing efficiency. However, this patent does not allow for machining back the tube.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a device and a method for processing a hollow square pipe.
A processing device for a clip-shaped pipe comprises a cross, an inserting frame and upper and lower cushion rods, wherein the upper and lower ends of the cross are provided with the upper and lower cushion rods, and the center of the cross is provided with the inserting frame.
The utility model provides a pipe processingequipment returns still includes about the backing rod, and the backing rod about both ends are all fixedly connected with of cross.
The utility model provides a time shape pipe processingequipment still includes the connecting strip, and the middle part fixedly connected with of cross connects two connecting strips, inserts frame fixed connection on two connecting strips.
The processing device for the clip-shaped pipe further comprises a limiting column, wherein the limiting column is fixedly connected between the connecting strip on the left side and the left and right cushion rods; and a limiting column is fixedly connected between the connecting strip on the right side and the left and right cushion rods.
The utility model provides a time shape pipe processingequipment still includes the tray, inserts the frame and sets up the one side at the tray.
The utility model provides a time pipe processingequipment still includes base and support column, the upside fixed connection support column of base, the upside fixedly connected with tray of support column.
The utility model provides a time shape pipe processingequipment still includes fixed cover, rolls over frame and housing screw I, and the one end of base has linked firmly fixed cover, rolls over the frame and can sheathe in the fixed slip that is rolled over, rolls over the upper portion fixedly connected with cross of frame, and fixed sheathe in has housing screw I through threaded connection, and housing screw I compresses tightly on rolling over the frame.
The utility model provides a time pipe processingequipment still includes housing screw II, and housing screw II respectively is provided with one about, and two housing screw II pass through threaded connection respectively in the left and right sides of tray.
A method for processing a return pipe by a return pipe processing device comprises the following steps:
(A) the four bars are respectively arranged on the inner sides of the outer rectangular tubes;
(B) the four cushion strips are respectively arranged at the four strip rods;
(C) installing an inner rectangular pipe between the four filler strips;
(D) and blocking pieces are arranged at two ends of each bar.
The invention relates to a device and a method for processing a clip pipe, which have the beneficial effects that:
the invention can be used for processing a return pipe.
Drawings
The invention is described in further detail below with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a schematic structural diagram of a hairpin tube processing apparatus for processing a hairpin tube;
FIG. 2 is a schematic view of a part of a pipe processing apparatus;
FIG. 3 is a first schematic structural diagram of a loop pipe;
FIG. 4 is a second schematic structural view of the return pipe;
FIG. 5 is a schematic structural view of an outer rectangular tube;
FIG. 6 is a first schematic structural view of a backing strip;
FIG. 7 is a second schematic structural view of a backing strip;
FIG. 8 is a schematic view of the base and tray configuration;
FIG. 9 is a schematic view of the cross and frame;
FIG. 10 is a schematic view of the structure of the cross;
fig. 11 is a schematic view of the structure of the molding.
In the figure: an outer rectangular tube 1001; a bar 1002; a chute 1003; an inner rectangular pipe 1004; a hand screw 1005; a bead 2001; right angle slots 2002; a stopper 2003; a bump 2004; a connection screw 2005; a base 3001; a support column 3002; a fixing sleeve 3003; a folding frame 3004; a compression screw I3005; a tray 3006; a compression screw II 3007; a cross 4001; a connecting bar 4002; a left and right bolster lever 4003; a spacing post 4004; an insert frame 4005; an upper and lower bolster lever 4006; a boss 4007; a compression screw III 4008; a bead 5001; a restriction groove 5002; a square column 5003; a wafer 5004.
Detailed Description
Referring to fig. 9-10, an embodiment of the present invention is provided, which solves the main technical problem of forming a pipe with a square-shaped cross section, and further,
because the upper end and the lower end of the cross 4001 are fixedly connected with the upper cushion rod 4006 and the lower cushion rod 4006, the center of the cross 4001 is fixedly connected with the inserting frame 4005, the inserting frame 4005 is inserted into the inner side of the inner rectangular tube 1004, then the two upper cushion rods 4006 and the lower cushion rods 4006 are respectively inserted into the upper side and the lower side of the inner side of the outer rectangular tube 1001, the inner rectangular tube 1004 is supported on the inner side of the outer rectangular tube 1001, a certain gap is formed between the outer rectangular tube 1001 and the inner rectangular tube 1004, and the cross sections 1001 of the outer rectangular tube and the inner rectangular tube 1004 form a square shape, so that a square-shaped pipeline is manufactured.
Referring to fig. 9-10, an embodiment of the present invention is provided, which solves the main technical problem of supporting the upper, lower, left and right positions of an external rectangular pipe 1001 by two upper and lower cushion bars 4006 and two left and right cushion bars 4003, and further,
because the left end and the right end of the cross 4001 are fixedly connected with the left cushion rod 4003 and the right cushion rod 4003, the left cushion rod 4003 and the right cushion rod 4003 are inserted into the left side and the right side of the inner side of the outer rectangular tube 1001, the upper cushion rod 4006 and the two left cushion rods 4003 support the upper position, the lower position, the left position and the right position of the outer rectangular tube 1001, the inner rectangular tube 1004 is supported on the inner side of the outer rectangular tube 1001, a certain gap is formed between the outer rectangular tube 1001 and the inner rectangular tube 1004, and then the cross sections of the outer rectangular tube 1001 and the inner rectangular tube 1004 form a square shape, so that a square-shaped pipeline is manufactured.
Referring to fig. 9-10, an embodiment of the present invention is provided, which solves the main technical problem that two connecting bars 4002 function as a connecting frame 4005, and further,
because the middle part of cross 4001 is fixedly connected with two connecting strips 4002, insert frame 4005 is fixedly connected on two connecting strips 4002, and two connecting strips 4002 play a role in connecting insert frame 4005.
Referring to fig. 9-10, an embodiment of the present invention is provided to solve the main technical problem that when two limiting columns 4004 contact with the outer sides of the outer rectangular tube 1001, the two left and right cushion bars 4003 and the two upper and lower cushion bars 4006 cannot move inward continuously to achieve the limiting effect, and further,
because the connecting strip 4002 positioned on the left side is fixedly connected with the left and right cushion rods 4003 through the limiting columns 4004; the connecting strip 4002 that is located the right side links firmly spacing post 4004 between with controlling the backing rod 4003 for when backing rod 4003 and two about insert in outer rectangular pipe 1001 about two, backing rod 4003 and two about, when two outside contacts of spacing post 4004 and outer rectangular pipe 1001, backing rod 4003 and two about can't continue inwards to move, reach spacing effect about two.
Referring to fig. 1 and 8-10, an embodiment of the present invention is provided, which solves a main technical problem of facilitating the arrangement of the inner rectangular pipe 1004 inside the outer rectangular pipe 1001. And further, the first and second electrodes are arranged in parallel,
since the insert frame 4005 is disposed on one side of the tray 3006, the tray 3006 functions to hold the outer rectangular tube 1001 up and fix it, and then to move the insert frame 4005 into the outer rectangular tube 1001, thereby facilitating the arrangement of the inner rectangular tube 1004 inside the outer rectangular tube 1001.
Referring to fig. 1 and fig. 8-10, an embodiment of the present invention is provided, which solves the main technical problem that the base 3001 and the supporting column 3002 play a role of supporting and fixing the tray 3006, and further,
because the upside fixedly connected with support column 3002 of base 3001 to tray 3006 links firmly the upside at support column 3002, and then base 3001 and support column 3002 have played the effect of supporting and fixed tray 3006.
Referring to fig. 1 to 11, an embodiment of the present invention is provided, which solves the main technical problem of facilitating the arrangement of an inner rectangular pipe 1004 in an outer rectangular pipe 1001, and further,
because the one end of base 3001 has linked firmly fixed cover 3003, roll over frame 3004 sliding connection on fixed cover 3003, threaded connection has housing screw I3005 on the fixed cover 3003, housing screw I3005 presses on folding frame 3004, cross 4001 links firmly on folding frame 3004's upper portion, and then make folding frame 3004 slide around fixed cover 3003, housing screw I3005 is used for fixed folding frame 3004, will roll over the fixed back of frame 3004, cross 4001, control backing rod 4003 about, spacing post 4004, insert frame 4005, upper and lower backing rod 4006 also can be fixed thereupon, and then be convenient for fix insert frame 4005 in the inside of outer rectangular pipe 1001, be convenient for set up interior rectangular pipe 1004 in outer rectangular pipe 1001.
Referring to fig. 1-11, an embodiment of the present invention is provided, which solves the main technical problem of firmly fixing the outer rectangular tube 1001 to the tray 3006, and further,
because two housing screw II3007 are threaded connection respectively in the left and right sides of tray 3006, and then rotating housing screw II3007 can push up housing screw II3007 on outer rectangular pipe 1001, and then make firm the fixing on tray 3006 of outer rectangular pipe 1001, and then be convenient for set up interior rectangular pipe 1004 in outer rectangular pipe 1001.
Referring to fig. 1-11, an embodiment of the present invention is provided, which solves the main technical problem of facilitating the fixing of the bar 1002 inside the outer rectangular tube 1001 by the hand screw 1005, and further,
because be provided with bellying 4007 on upper and lower backing bar 4006, threaded connection has housing screw III4008 on the bellying 4007, the middle part of layering 5001 has linked firmly square column 5003, square column 5003 sliding connection is on bellying 4007, the outer end of layering 5001 has linked firmly disk 5004, compression spring has cup jointed on the square column 5003, compression spring is located between bellying 4007 and disk 5004, both ends all are provided with restriction groove 5002 about layering 5001, and then make the compression spring on two square columns 5003 give two layering 5001 the power of keeping away from each other all the time, insert the inboard of rectangular pipe 1001 outside with four barres 1002, make two layering 5001 press on the barres 1002 in rectangular pipe 1001 outside, be convenient for fix the inboard of rectangular pipe 1001 outside with barres 1002, then be convenient for fix barres 1002 in rectangular pipe 1001 outside through hand screw 1005. The limiting groove 5002 on the pressing bar 5001 plays a role in limiting the left and right positions of the bar 1002.
A method for processing a return pipe by a return pipe processing device comprises the following steps:
(A) the four rods 1002 are respectively arranged on the inner sides of the outer rectangular tubes 1001;
(B) four cushion bars 2001 are respectively installed at the four bar rods 1002;
(C) the inner rectangular pipe 1004 is installed between the four beads 2001;
(D) at both ends of each bar 1002, stoppers 2003 are installed.
The square-tube processing device further comprises a compression screw III4008, the boss 4007 is in threaded connection with the compression screw III4008, and the compression screw III4008 is pressed on the square column 5003.
Referring to fig. 1-11, an embodiment of the present invention is provided, which solves the main technical problem of fixing the position of the pressing bar 5001 when necessary, and further,
the square column 5003 can be fixed on the boss 4007 by screwing the compression screw III4008 on the boss 4007, and then the position of the pressing strip 5001 can be fixed when needed.
The pipe of said paper clip processing unit processing includes the outer rectangular pipe 1001, inner rectangular pipe 1004 and filler strip 2001, the inner rectangular pipe 1004 is connected in the centre of the outer rectangular pipe 1001 through four filler strips 2001.
Referring to fig. 1-11, an embodiment of the present invention is provided, which solves the main technical problem of enabling an inner rectangular pipe 1004 to be arranged at the center of an outer rectangular pipe 1001, and further,
the four beads 2001 function to support the inner rectangular tubes 1004 within the outer rectangular tubes 1001 so that the inner rectangular tubes 1004 can be disposed at the center of the outer rectangular tubes 1001.
The clip pipe processed by the clip pipe processing device further comprises right-angle grooves 2002, each filler strip 2001 is provided with the right-angle groove 2002, and the inner rectangular pipe 1004 is inserted among the four right-angle grooves 2002.
Referring to fig. 1-11, an embodiment of the present invention is provided, which solves the main technical problem of inserting an inner rectangular pipe 1004 between four beads 2001, and further,
the purpose of the four right angle slots 2002 is to allow the insertion of the inner rectangular pipe 1004 between the four spacers 2001.
The hollow square pipe processed by the hollow square pipe processing device further comprises bars 1002, sliding grooves 1003 and hand-screwed screws 1005, the inner side of the outer rectangular pipe 1001 is connected with the four bars 1002 through the hand-screwed screws 1005, the sliding grooves 1003 are formed in the four bars 1002, and the outer sides of the four cushion bars 2001 are inserted into the four sliding grooves 1003 respectively.
Referring to fig. 1-11, an embodiment of the present invention is provided, which solves the main technical problem that four bars 1002 are used to connect the pad bars 2001 inside the outer rectangular tube 1001, and further,
the four bars 1002 are used for connecting the pad strips 2001 in the outer rectangular tube 1001, and the sliding grooves 1003 on the bars 1002 are used for allowing the pad strips 2001 to be inserted into the bars 1002 for connection.
The clip processed by the clip processing device further comprises a blocking piece 2003, a bump 2004 and a connecting screw 2005, the end of each filler strip 2001 is fixedly connected with the bump 2004, each bump 2004 is connected with the blocking piece 2003 through the connecting screw 2005, and the two blocking pieces 2003 on the same filler strip 2001 are respectively positioned on two sides of the corresponding bar 1002.
Referring to fig. 1-11, an embodiment of the present invention is provided, which solves the main technical problem that two stopping sheets 2003 at two ends of a filler strip 2001 are used to prevent the filler strip 2001 from separating from a bar 1002, and further,
the projection 2004 serves to connect the stopper 2003 on the spacer 2001 by the connecting screw 2005, and the two stoppers 2003 at both ends of the spacer 2001 serve to prevent the spacer 2001 from being detached from the bar 1002.

Claims (10)

1. The utility model provides a time pipe processingequipment, includes cross (4001), inserts frame (4005) and upper and lower backing bar (4006), its characterized in that: an upper cushion rod and a lower cushion rod (4006) are arranged at the upper end and the lower end of the cross (4001), and an inserting frame (4005) is arranged in the center of the cross (4001).
2. A hollow coil processing apparatus according to claim 1, wherein: the cross is characterized by further comprising a left pad rod and a right pad rod (4003), wherein the left end and the right end of the cross (4001) are fixedly connected with the left pad rod and the right pad rod (4003).
3. A hollow coil processing apparatus according to claim 2, wherein: still include connecting strip (4002), the middle part fixedly connected with two connecting strips (4002) of cross (4001), insert frame (4005) fixed connection on two connecting strips (4002).
4. A hollow coil processing apparatus according to claim 3, wherein: the left-side connecting strip (4002) and the left and right cushion rods (4003) are fixedly connected with a limiting column (4004); a limiting column (4004) is fixedly connected between the connecting strip (4002) on the right side and the left and right cushion rods (4003).
5. A hollow square tube processing apparatus according to claim 4, wherein: the tray (3006) is further included, and the insert frame (4005) is arranged on one side of the tray (3006).
6. A hollow square tube processing apparatus according to claim 5, wherein: still include base (3001) and support column (3002), the upside of base (3001) has linked firmly support column (3002), and tray (3006) links firmly the upside at support column (3002).
7. The hollow coil processing apparatus according to claim 6, wherein: still including fixed cover (3003), roll over frame (3004) and housing screw I (3005), the one end of base (3001) has linked firmly fixed cover (3003), rolls over frame (3004) sliding connection on fixed cover (3003), and cross (4001) links firmly on the upper portion of rolling over frame (3004), and threaded connection has housing screw I (3005) on fixed cover (3003), and housing screw I (3005) are pressed on rolling over frame (3004).
8. The hollow coil processing apparatus according to claim 7, wherein: the tray is characterized by further comprising a compression screw II (3007), wherein the compression screw II (3007) is arranged on the left side and the right side respectively, and the two compression screws II (3007) are in threaded connection with the left side and the right side of the tray (3006) respectively.
9. A hollow coil processing apparatus according to claim 8, wherein: still include bellying (4007), layering (5001), restriction groove (5002), square column (5003) and disk (5004), be provided with bellying (4007) on upper and lower backing bar (4006), threaded connection has housing screw III (4008) on bellying (4007), the middle part of layering (5001) has linked firmly square column (5003), square column (5003) sliding connection is on bellying (4007), the outer end of layering (5001) has linked firmly disk (5004), compression spring has been cup jointed on square column (5003), compression spring is located between bellying (4007) and disk (5004), both ends all are provided with restriction groove (5002) about layering (5001).
10. The method for processing a hairpin tube by the hairpin tube processing apparatus as claimed in claim 9, comprising the steps of:
(A) the four rods (1002) are respectively arranged on the inner sides of the outer rectangular tubes (1001);
(B) four cushion strips (2001) are respectively arranged at the four strip rods (1002);
(C) mounting an inner rectangular tube (1004) between four beads (2001);
(D) blocking pieces (2003) are mounted at both ends of each bar (1002).
CN202110639756.0A 2021-06-09 2021-06-09 Device and method for machining clip-shaped pipe Active CN113351701B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110639756.0A CN113351701B (en) 2021-06-09 2021-06-09 Device and method for machining clip-shaped pipe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110639756.0A CN113351701B (en) 2021-06-09 2021-06-09 Device and method for machining clip-shaped pipe

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CN113351701A true CN113351701A (en) 2021-09-07
CN113351701B CN113351701B (en) 2023-03-21

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Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003294883A (en) * 2002-04-05 2003-10-15 Hitachi Ltd Double piping structure
JP2007186893A (en) * 2006-01-13 2007-07-26 Jfe Steel Kk Double steel-pipe type brace member
JP2008223415A (en) * 2007-03-15 2008-09-25 Jfe Steel Kk Double steel pipe type bracing member
CN202228806U (en) * 2011-08-29 2012-05-23 成都智利达科技有限公司 Double compression resistant composite tube
CN106736286A (en) * 2016-12-22 2017-05-31 浙江精工钢结构集团有限公司 A kind of cross based on double-layer circular sleeve pipe mechanism turns circular tube structure and preparation method
CN109434588A (en) * 2018-11-07 2019-03-08 林士军 Large diameter pipeline nozzle processing unit (plant)
CN210858602U (en) * 2019-09-23 2020-06-26 山西汾西矿业(集团)有限责任公司 Novel pressure-bearing sleeve for water detecting and draining orifice
CN111764669A (en) * 2020-07-20 2020-10-13 哈尔滨学院 Building module installation device
CN112264539A (en) * 2020-10-24 2021-01-26 金爱兰 Oil pipeline trimmer
CN212691191U (en) * 2020-04-25 2021-03-12 天津市宝丰钢管厂 Major diameter high strength spiral welded pipe

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003294883A (en) * 2002-04-05 2003-10-15 Hitachi Ltd Double piping structure
JP2007186893A (en) * 2006-01-13 2007-07-26 Jfe Steel Kk Double steel-pipe type brace member
JP2008223415A (en) * 2007-03-15 2008-09-25 Jfe Steel Kk Double steel pipe type bracing member
CN202228806U (en) * 2011-08-29 2012-05-23 成都智利达科技有限公司 Double compression resistant composite tube
CN106736286A (en) * 2016-12-22 2017-05-31 浙江精工钢结构集团有限公司 A kind of cross based on double-layer circular sleeve pipe mechanism turns circular tube structure and preparation method
CN109434588A (en) * 2018-11-07 2019-03-08 林士军 Large diameter pipeline nozzle processing unit (plant)
CN210858602U (en) * 2019-09-23 2020-06-26 山西汾西矿业(集团)有限责任公司 Novel pressure-bearing sleeve for water detecting and draining orifice
CN212691191U (en) * 2020-04-25 2021-03-12 天津市宝丰钢管厂 Major diameter high strength spiral welded pipe
CN111764669A (en) * 2020-07-20 2020-10-13 哈尔滨学院 Building module installation device
CN112264539A (en) * 2020-10-24 2021-01-26 金爱兰 Oil pipeline trimmer

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