CN212443937U - Pipe connecting flange assembling device - Google Patents

Pipe connecting flange assembling device Download PDF

Info

Publication number
CN212443937U
CN212443937U CN202021118429.8U CN202021118429U CN212443937U CN 212443937 U CN212443937 U CN 212443937U CN 202021118429 U CN202021118429 U CN 202021118429U CN 212443937 U CN212443937 U CN 212443937U
Authority
CN
China
Prior art keywords
supporting
plate
bottom plate
vertical plate
piece
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202021118429.8U
Other languages
Chinese (zh)
Inventor
张文明
黄孝鹏
苏佃锋
张云霞
白忠建
张龙玲
李立林
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.)
LUXI INDUSTRY EQUIPMENT CO LTD
Original Assignee
LUXI INDUSTRY EQUIPMENT CO LTD
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by LUXI INDUSTRY EQUIPMENT CO LTD filed Critical LUXI INDUSTRY EQUIPMENT CO LTD
Priority to CN202021118429.8U priority Critical patent/CN212443937U/en
Application granted granted Critical
Publication of CN212443937U publication Critical patent/CN212443937U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Abstract

The utility model relates to a large-scale pipeline group is to welding equipment field, concretely relates to flange group of connecting pipe is to device. The method comprises the following steps: the device comprises a first supporting piece, a connecting piece, a positioning piece, a connecting rod, an adjusting bolt and a second supporting piece. The first supporting part comprises a first supporting bottom plate and a first supporting vertical plate, and the first supporting vertical plate is fixedly connected with the first supporting bottom plate. The second supporting piece comprises a second supporting bottom plate and a second supporting vertical plate, and the second supporting vertical plate is fixedly connected with the second supporting bottom plate. The connecting piece comprises a connecting plate, a positioning shaft and a pin shaft hole; the positioning piece comprises a positioning block, a gap adjusting block and a fixing bolt; the adjusting bolt comprises a screw and a nut. The device can reduce the occupied time of a travelling crane in the process of assembling and welding the pipe connecting flange and improve the safety factor; and 1 person just can accomplish the flange assembly welding work of connecting pipe, guarantees the wrong limit volume, group to the clearance deviation, guarantees welding quality.

Description

Pipe connecting flange assembling device
Technical Field
The utility model relates to a large-scale pipeline group is to welding equipment field, concretely relates to flange group of connecting pipe is to device.
Background
At present, assembly welding of a connecting pipe and a flange is the most common pipe orifice connecting mode in pressure vessel and engineering installation, and the quality of assembly welding and the efficiency directly influence the quality and the efficiency of pressure vessel manufacturing and engineering installation. When large flanges and pipeline components are welded, such as flange assembly welding of a connecting pipe with specification DN200mm-DN500mm, 2 persons are needed for matching, assembly is adjusted according to the requirement of misalignment amount and assembly clearance, positioning welding is carried out after the assembly is qualified, certain potential safety hazards exist in the assembly welding process, especially when the flanges above DN300mm need to occupy a travelling crane for a long time for hoisting, and due to human factors, misalignment amount and assembly clearance deviation are large, and the subsequent welding quality is affected.
In the prior art, the flange is positioned in a supporting and hanging mode, and the flange plate is fixedly sleeved outside the two supporting and hanging bolts by adjusting the distance between the two supporting and hanging bolts. However, the diameter of the pipeline is large, and the diameter and the self weight of the corresponding flange are large, so that the positioning operation of the device for large flanges is complex, and the vertical placement stability of the flanges is difficult to ensure; in addition, when pipeline and flange size and weight are great, connection structure atress is uneven, produces local wear even driving medium inefficacy for a long time easily. In the prior art, a transverse moving guide rail and a longitudinal moving mechanism are added in the assembly welding process, rolling parts are required to be arranged to reduce friction, and the device is complex in overall structure and high in requirements on equipment and operation.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem that positioning difficulty and stability are poor in the process of welding of the pipe flange assembly in the prior art, the utility model provides a pipe flange assembly is to device. The device can reduce the occupied time of a travelling crane in the process of assembling and welding the pipe connecting flange and improve the safety factor; and 1 person just can accomplish the flange assembly welding work of connecting pipe, guarantees the wrong limit volume, group to the clearance deviation, guarantees welding quality.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a pipe flange pairing apparatus comprising: the device comprises a first supporting piece, a connecting piece, a positioning piece, a connecting rod, an adjusting bolt and a second supporting piece;
the first support comprises a first support bottom plate and a first support vertical plate, and the first support vertical plate is fixedly connected with the first support bottom plate;
the second supporting part comprises a second supporting bottom plate and a second supporting vertical plate, and the second supporting vertical plate is fixedly connected with the second supporting bottom plate;
the connecting piece comprises a connecting plate, a positioning shaft and a pin shaft hole, one end of the connecting plate is connected with the first supporting vertical plate, the other end of the connecting plate is connected with the positioning piece, and the middle of the connecting plate is connected with the connecting rod;
the positioning piece comprises a positioning block, a gap adjusting block and a fixing bolt;
one end of the connecting rod is connected with the middle of the connecting plate, and the other end of the connecting rod is connected with a second supporting vertical plate of the second supporting piece;
the adjusting bolt comprises a screw rod, a first nut and a second nut, one end of the screw rod is connected with the first supporting base, and the other end of the screw rod is connected with the second supporting base plate.
The embodiment of the utility model provides a following beneficial effect has:
1) the embodiment of the utility model provides an in set up: the tool has the advantages that the tool is simple in structure and convenient to operate, service time of a travelling crane in the assembling process is reduced, potential safety hazards are greatly reduced, and operation safety is improved;
2) the embodiment of the utility model provides a setting element that sets up has realized the right individual soldier's operation of flange of connecting pipe, has reduced the fault variable, to the adjust time in clearance, has improved flange of connecting pipe group to efficiency and group to the quality.
Drawings
The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without unduly limiting the scope of the invention.
Fig. 1 is the embodiment of the utility model provides an in the embodiment quick group of flange of connecting pipe is to the device structure chart.
Fig. 2 is a front view of the first support member according to the embodiment of the present invention.
Fig. 3 is a top view of the first support member according to an embodiment of the present invention.
Fig. 4 is a front view of the connector in the embodiment of the present invention.
Fig. 5 is a side view of a connector in an embodiment of the present invention.
Fig. 6 is a front view of the positioning member in the embodiment of the present invention.
Fig. 7 is a side view of a positioning member according to an embodiment of the present invention.
Fig. 8 is a front view of an adjusting bolt according to an embodiment of the present invention.
Fig. 9 is a front view of a second support member according to an embodiment of the present invention.
Fig. 10 is a top view of a second support member according to an embodiment of the present invention.
Wherein: 1. the device comprises a first supporting piece, 2, a connecting piece, 3, a positioning piece, 4, a connecting rod, 5, an adjusting bolt, 6, a second supporting piece, 1-1, a first supporting bottom plate, 1-2, a first supporting vertical plate, 1-3, a first bolt hole, 1-4, a first pin shaft hole, 2-1, a connecting plate, 2-2, a positioning shaft, 2-3, a pin shaft hole, 3-1, a positioning block, 3-2, a gap adjusting block, 3-3, a fixing bolt, 3-4 bolts, 5-1, a screw, 5-2, a second nut, 5-3 a first nut, 6-1, a second supporting bottom plate, 6-2, a second supporting vertical plate, 6-3, a second bolt hole, 6-4 and a second pin shaft hole.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the invention. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise, and it should be understood that when the term "comprising" is used in this specification it indicates the presence of the feature, step, operation, device, component and/or combination thereof.
In order to solve the problem that positioning difficulty and stability are poor in the process of welding of the pipe flange assembly in the prior art, the utility model provides a pipe flange assembly is to device. The device can reduce the occupied time of a travelling crane in the process of assembling and welding the pipe connecting flange and improve the safety factor; and 1 person just can accomplish the flange assembly welding work of connecting pipe, guarantees the wrong limit volume, group to the clearance deviation, guarantees welding quality.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
as shown in fig. 1, a pipe flange pairing device includes: the device comprises a first support member 1, a connecting member 2, a positioning member 3, a connecting rod 4, an adjusting bolt 5 and a second support member 6.
The first supporting part 1 comprises a first supporting bottom plate 1-1 and a first supporting vertical plate 1-2, and the first supporting vertical plate 1-2 is fixedly connected with the first supporting bottom plate 1-1.
In some embodiments of the present invention, the first supporting bottom plate 1-1 is centrally provided with a first bolt hole 1-3.
In some embodiments of the present invention, one end of the first supporting vertical plate 1-2 is fixedly connected to the first supporting bottom plate 1-1, and the other end is provided with a first pin hole 1-4, as shown in fig. 2.
In some embodiments of the present invention, the first supporting vertical plates 1-2 are uniformly distributed at four corners of the first supporting bottom plate 1-1 in a group of two by two, and are fixed by welding, as shown in fig. 3.
The first supporting bottom plate 1-1 is arranged to be square and has a structure with four chamfered corners, so that the first supporting bottom plate 1-1 can be prevented from being clamped in the inner wall of the pipeline, if the first supporting bottom plate 1-1 is designed to be round or other convex shapes, the positioning of the first supporting vertical plate 1-2 is not facilitated, and if the four sides are designed to be concave shapes, the structural stability of the first supporting bottom plate 1-1 is not facilitated.
The second supporting member 6 includes a second supporting bottom plate 6-1 and a second supporting upright plate 6-2, and the second supporting upright plate 6-2 is fixedly connected to the second supporting bottom plate 6-1, as shown in fig. 9.
In some embodiments of the present invention, the second supporting bottom plate 6-1 is centrally provided with a second bolt hole 6-3.
In some embodiments of the present invention, one end of the second supporting vertical plate 6-2 is fixedly connected to the second supporting bottom plate 6-1, and the other end is provided with a second pin hole 6-4.
In some embodiments of the present invention, the second supporting vertical plates 6-2 are uniformly distributed at four corners of the second supporting bottom plate 6-1 in a group of two by two, and are fixed by welding, as shown in fig. 10.
The second supporting bottom plate 6-1 is arranged to be square and has a structure with four chamfered corners, so that the second supporting bottom plate 6-1 can be prevented from being clamped in the inner wall of the pipeline, if the second supporting bottom plate 6-1 is designed to be round or other convex shapes, the positioning of the second supporting vertical plate 6-2 is not facilitated, and if the four sides are designed to be concave shapes, the structural stability of the second supporting bottom plate 6-1 is not facilitated.
Further, the shape, the structural design and the size of the second supporting piece 6 are the same as those of the first supporting piece 1, so that the design is favorable for improving the assembling effect, and the assembling error caused by the asymmetrical and unstable structure of the assembling device is avoided.
The connecting piece 2 comprises two connecting plates 2-1, a positioning shaft 2-2 and a pin shaft hole 2-3, wherein one end of one connecting plate 2-1 is connected with the first supporting vertical plate 1-2, one end of the other connecting plate 2-1 is connected with the positioning piece 3, and the middle of the two connecting plates 2-1 is connected with a connecting rod 4, as shown in figure 4.
In some embodiments of the present invention, the connector 2 has a plurality of pin holes.
Furthermore, the connecting piece 2 is provided with 3 pin shaft holes 2-3, the pin shaft holes at two ends are respectively connected with the first supporting vertical plate 1-2 and the positioning piece 3 through pin shafts, the pin shaft hole in the middle is connected with the connecting rod 4 through a pin shaft, and the two connecting plates 2-1 are fixed through spot welding. The connecting element 2 is shown in a side view in fig. 5.
The positioning element 3 comprises a positioning block 3-1, a gap adjusting block 3-2 and a fixing bolt 3-3, and the positioning element 3 is shown in the front view and the side view in fig. 6 and 7.
The positioning block 3 is connected with the connecting piece 2 through a fixing bolt 3-3, and the gap adjusting block 3-2 and the fixing block 3-1 are used for fixing the connecting pipe and the flange and ensuring the assembly gap between the connecting pipe and the flange.
The positioning piece 3 further comprises bolts 3-4, one end of each positioning piece 3 is provided with one bolt 3-4, when the connecting pipe and the flange are fixed on the positioning piece 3, a certain gap exists between the inner walls of the connecting pipe and the flange and the positioning piece 3 sometimes, the screwing-in and screwing-out distances of the bolts in the bolts 3-4 are adjusted, the distances from the inner walls of the connecting pipe and the flange to the positioning piece 3 in four directions are equal, and the butt joint precision of the connecting pipe and the flange is further adjusted.
One end of the connecting rod 4 is connected with the middle of the connecting plate 2-1 through a pin shaft, and the other end of the connecting rod is connected with a second supporting vertical plate 6-2 of the second supporting piece 6 through a pin shaft;
the adjusting bolt 5 comprises a screw rod 5-1, a first nut 5-3 and a second nut 5-2. One end of the screw rod 5-1 is connected with the first supporting bottom plate 1-1, and the other end is connected with the second supporting bottom plate 6-1.
In some embodiments of the present invention, the lower portion of the screw rod 5-1 is fixedly connected to the first bolt hole 1-3 of the first supporting base plate 1-1 by a first nut 5-3, and the upper portion thereof passes through the second bolt hole 6-4 of the second supporting base plate 6-1 and is fixedly connected to the second nut 5-2, as shown in fig. 8.
The connection mode of the screw 5-1 can realize flexible adjustment of the position of the second bottom plate 6-1, so that the included angle of the connecting piece 2 and the connecting rod 4 is adjusted, the position of the positioning piece 3 is controlled, and the positioning connection of flanges and pipelines with different sizes is realized.
The utility model discloses a some embodiment working processes do: firstly, according to the specification of a pipe connecting flange, the device is placed in a pipe connecting by adjusting an adjusting bolt 5, the positions of a connecting rod 4 and a connecting piece 2 are adjusted by adjusting the position of a second nut 5-2, so that a positioning block 3-1 is tightly attached to the inner wall of the pipe connecting, and a gap adjusting block 3-2 is tightly attached to the bevel end of the pipe connecting; then, the flange is hoisted in place by using a crane and is located on the gap adjusting block 3-2, and the flange and the connecting pipe are relatively fixed by adjusting the fixing bolt 3-3. After the positioning welding is finished, the fixing bolts 3-3 are loosened, and then the device is separated from the pipe connecting flange by adjusting the position of the second nuts 5-2 on the adjusting bolts 5, so that the assembly work of the pipe connecting flange is finished.
In some embodiments of the present invention, the first supporting bottom plate 1-1 is made of stainless steel, and has a size of 150mm × 150mm, a thickness of 12-20mm, preferably 12-16mm, and a middle-processing first bolt hole with a diameter of 15-25mm, preferably 18-22mm, and more preferably 19 mm.
In yet another embodiment, the four corners of the first support floor 1-1 are chamfered at 20mm x 45 °.
In another embodiment, the first supporting vertical plate 1-2 is made of stainless steel, and has a size of 30mm × 75mm, a thickness of 4-10mm, preferably 4-6mm, and a semicircular end with a diameter of 15mm, and is provided with a pin hole with a diameter of 6-12mm, preferably 8-10mm, and more preferably 10 mm.
In yet another embodiment, the second supporting bottom plate 6-1 and the first supporting bottom plate 1-1 are the same in size and material.
In another embodiment, the second supporting vertical plate 6-2 and the first supporting vertical plate 1-2 have the same size and material.
In some embodiments of the present invention, the connecting plate 2-1 is made of stainless steel, has a size of 30mm × 150mm, a thickness of 4-10mm, preferably 4-6mm, and has two semicircular ends with a diameter of 15mm, and is provided with a pin hole with a diameter of 8-10mm, preferably 10 mm.
In another embodiment, the positioning shaft 2-2 is made of stainless steel or carbon steel, has an outer diameter of 36mm, a thickness of 20mm, and a central pin hole with a diameter of 10 mm.
In another embodiment, the positioning block 3-1 is made of stainless steel, and is machined with a pin shaft hole with a diameter of 8-10mm, preferably 10 mm; the gap adjusting block 3-2 is made of stainless steel, is semicircular in structure, has a radius of 20mm and a thickness of 2-5mm, and is preferably 2-3 mm.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The utility model provides a flange of connecting pipe group is to device which characterized in that includes: the device comprises a first supporting piece, a connecting piece, a positioning piece, a connecting rod, an adjusting bolt and a second supporting piece;
the first support comprises a first support bottom plate and a first support vertical plate, and the first support vertical plate is fixedly connected with the first support bottom plate;
the second supporting part comprises a second supporting bottom plate and a second supporting vertical plate, and the second supporting vertical plate is fixedly connected with the second supporting bottom plate;
the connecting piece comprises a connecting plate, a positioning shaft and a pin shaft hole, one end of the connecting plate is connected with the first supporting vertical plate, the other end of the connecting plate is connected with the positioning piece, and the middle of the connecting plate is connected with the connecting rod;
the positioning piece comprises a positioning block, a gap adjusting block and a fixing bolt;
one end of the connecting rod is connected with the middle of the connecting plate, and the other end of the connecting rod is connected with a second supporting vertical plate of the second supporting piece;
the adjusting bolt comprises a screw rod, a first nut and a second nut, one end of the screw rod is connected with the first supporting base, and the other end of the screw rod is connected with the second supporting base plate.
2. A pipe coupling flange pairing apparatus as claimed in claim 1, wherein the first support floor is centrally provided with a first bolt hole.
3. A pipe coupling flange pairing device according to claim 1, wherein one end of the first support upright plate is fixedly connected with the first support base plate, and the other end is provided with a first pin shaft hole.
4. A pipe coupling flange pairing apparatus as claimed in claim 1, wherein the second support floor is centrally provided with a second bolt hole.
5. A pipe connecting flange pairing device according to claim 1, wherein one end of the second supporting vertical plate is fixedly connected with the second supporting bottom plate, and the other end of the second supporting vertical plate is provided with a second pin shaft hole.
6. A pipe coupling flange pairing device according to claim 1, wherein the first support vertical plates are uniformly distributed at four corners of the first support bottom plate in groups of two by two and are fixed by welding.
7. A pipe connecting flange pairing device according to claim 1, wherein the second supporting vertical plates are uniformly distributed at four corners of the second supporting bottom plate in a paired and grouped manner and are fixed by welding.
8. A pipe coupling flange assembling device according to claim 1, wherein said screw is fixedly connected to a first bolt hole of a first support base plate at a lower portion thereof, and fixedly connected to a second bolt hole of a second support base plate at an upper portion thereof through a second nut.
9. A pipe coupling flange pairing device according to claim 1, wherein the first support base plate is made of stainless steel, has dimensions of 150mm x 150mm, has a thickness of 12-20mm, preferably 12-16mm, and is provided with a first bolt hole with a diameter of 15-25mm, preferably 18-22mm, and more preferably 19 mm;
preferably, the chamfer angle of the four corners of the first supporting bottom plate is 20mm multiplied by 45 degrees;
preferably, the first supporting vertical plate is made of stainless steel, the size of the first supporting vertical plate is 30mm multiplied by 75mm, the thickness of the first supporting vertical plate is 4-10mm, preferably 4-6mm, one end of the first supporting vertical plate is a semicircle with the diameter of 15mm, and a pin shaft hole with the diameter of 6-12mm is machined, preferably 8-10mm, and further preferably 10 mm;
preferably, the second supporting bottom plate and the first supporting bottom plate are the same in size and material;
preferably, the second supporting vertical plate and the first supporting vertical plate have the same size and material.
10. A pipe connecting flange pairing device according to claim 1, wherein the connecting plates are made of stainless steel, have the dimensions of 30mm x 150mm, have the thickness of 4-10mm, preferably 4-6mm, are semicircular at two ends with the diameter of 15mm, and are provided with pin shaft holes with the diameter of 8-10mm, preferably 10 mm;
further, the positioning shaft is made of stainless steel and carbon steel, the outer diameter of the positioning shaft is 36mm, the thickness of the positioning shaft is 20mm, and a pin shaft hole with the diameter of 10mm is machined in the center of the positioning shaft;
furthermore, the positioning block is made of stainless steel, and a pin shaft hole with the diameter of 8-10mm, preferably 10mm, is machined; the gap adjusting block is made of stainless steel, is semicircular in structure, has the radius of 20mm and the thickness of 2-5mm, and is preferably 2-3 mm;
further, the positioning piece further comprises a bolt.
CN202021118429.8U 2020-06-16 2020-06-16 Pipe connecting flange assembling device Active CN212443937U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202021118429.8U CN212443937U (en) 2020-06-16 2020-06-16 Pipe connecting flange assembling device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202021118429.8U CN212443937U (en) 2020-06-16 2020-06-16 Pipe connecting flange assembling device

Publications (1)

Publication Number Publication Date
CN212443937U true CN212443937U (en) 2021-02-02

Family

ID=74469513

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202021118429.8U Active CN212443937U (en) 2020-06-16 2020-06-16 Pipe connecting flange assembling device

Country Status (1)

Country Link
CN (1) CN212443937U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114571394A (en) * 2022-04-11 2022-06-03 青岛新力通工业有限责任公司 Special tool for assembling industrial furnace conversion furnace tube and flange

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114571394A (en) * 2022-04-11 2022-06-03 青岛新力通工业有限责任公司 Special tool for assembling industrial furnace conversion furnace tube and flange

Similar Documents

Publication Publication Date Title
CN212443937U (en) Pipe connecting flange assembling device
CN111112933A (en) Auxiliary connecting tool for butt joint of large-diameter steel pipes
CN105081666A (en) Pairing welding method for large-diameter steel pipes and pairing welding apparatus for same
CN108817720A (en) The fast junction apparatus and its construction method of round tube
CN210818193U (en) Block assembly tool for block-type steel pipe ring
CN216007274U (en) Assembling mechanism of steel structure
CN110877182B (en) Welding tool for assembling and welding pantograph mounting seat and welding method for pantograph mounting seat
CN110722317A (en) Block assembly tool and method for block type steel pipe ring
CN212019906U (en) Auxiliary connecting tool for butt joint of large-diameter steel pipes
CN115162596A (en) Circular dome roof steel truss construction method
CN206998116U (en) A kind of ship stern post welding equipment device
CN108148962B (en) Tool for replacing hearth roll and use method thereof
CN217942478U (en) High-strength multi-working-condition adaptable butt joint device
CN202053039U (en) Welding clamp for truss girder
CN216504510U (en) Sea pipe pairing adjusting device
CN212918212U (en) Steel plate assembling device
CN216829454U (en) Ejector pipeline assembly welding device
CN216000287U (en) Flange installation auxiliary device
CN219317790U (en) Auxiliary device for modularized installation of pipelines in pipe gallery
CN214506426U (en) Angle-adjustable cable support
CN219118861U (en) Temporary fixing structure
CN220283496U (en) Pump head jacking device
CN215293863U (en) Base device is assembled to steel bifurcated pipe
CN211895671U (en) Large-span arched pipe truss hoisting auxiliary device
CN218698320U (en) Semi-automatic assembly device for shell-and-tube heat exchanger

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant