CN212398833U - Adjustable pipe fitting anchor clamps - Google Patents
Adjustable pipe fitting anchor clamps Download PDFInfo
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- CN212398833U CN212398833U CN202020963194.6U CN202020963194U CN212398833U CN 212398833 U CN212398833 U CN 212398833U CN 202020963194 U CN202020963194 U CN 202020963194U CN 212398833 U CN212398833 U CN 212398833U
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- main shaft
- supporting
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- clamp
- end plate
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Abstract
The utility model provides an adjustable pipe fitting clamp.A transmission mechanism is arranged on a base, the transmission mechanism is connected with a clamping device through a linkage mechanism and drives the clamping device to move, and the clamping device is of a clamping jaw structure and can clamp or support a pipe fitting; the transmission mechanism converts the axial position change into the circumferential size change of the linkage mechanism, so as to drive the clamping device to clamp or support the pipe fitting. The utility model has reasonable structure, and the clamp and the base can be flexibly arranged at the operation position; the size of the clamp can be adjusted in a larger range; the positions of the three end supporting rods are synchronously changed in the circumferential direction, and additional centering is not needed after the assembly of the clamp is finished; the manufacturing is simple and convenient, and the cost is economic; simple operation and low level dependence on operators.
Description
Technical Field
The utility model belongs to the technical field of machinery and engineering, a but adjustable pipe fitting anchor clamps are related to, in particular to but turn into the adjustable pipe fitting anchor clamps of circumference size change with the axial position change through the screw drive.
Background
In the field of machinery and engineering, a pipe often needs to be clamped or supported to perform machining and other process operations, and a lathe chuck is usually adopted to clamp the pipe.
The following technical drawbacks exist: the manufacturing cost of the lathe is high, the clamping part needs to be centered, and the size change range of the clamp is small; for large sized pipe, especially for applications requiring processing operations at the construction site, it is difficult to clamp the pipe using a lathe chuck configuration.
How to design an adjustable pipe fitting clamp, how to be applicable to engineering field operation becomes the problem that needs to be solved urgently.
SUMMERY OF THE UTILITY MODEL
In view of the above disadvantages of the prior art, the present invention provides an adjustable pipe clamp, which is used to solve the problems of the prior art that the cost of the lathe is high, the clamping member needs to be centered, and the size variation range of the clamp is small; for large-sized pipes, especially for application scenarios requiring process operations in engineering sites, the clamping of the pipes by the lathe chuck structure is very difficult.
In order to achieve the above object, the utility model provides an adjustable pipe fitting anchor clamps, the on-line screen storage device comprises a base, the base on be provided with drive mechanism, drive mechanism passes through the link gear and is connected and drive clamping device motion with clamping device, clamping device is the jack catch structure and can the centre gripping or support the pipe fitting.
In an embodiment of the utility model, drive mechanism turn into link gear's circumference size change with the axial position change to drive clamping device centre gripping or support the pipe fitting.
In an embodiment of the present invention, the transmission mechanism includes a fixed end, the fixed end includes a main shaft, one end of the main shaft is fixedly mounted on the base, and the other end of the main shaft is sequentially provided with a positioning disc and a linkage mechanism towards the direction of the base;
by adopting the technical scheme: the base provides support for the whole clamp structure, and the height of the base can be adjusted according to the size of the pipe fitting; an axially adjusted position reference is provided by the puck.
In an embodiment of the present invention, a main shaft front end plate is disposed at one end in the main shaft, a main shaft rear end plate is disposed at the other end in the main shaft, two support cylinders arranged at intervals are disposed between the main shaft rear end plate and the positioning plate, and both the two support cylinders are fixedly mounted on the base;
the outer ring of the main shaft where the front end plate of the main shaft is located is provided with a sliding sleeve, the two ends of the sliding sleeve are provided with connecting blocks which are arranged at intervals, and the outer ring of each connecting block is provided with a plurality of bosses which are uniformly distributed around the circumference.
In an embodiment of the present invention, the centers of the main shaft front end plate and the main shaft rear end plate are both provided with a driving shaft, the driving shaft is spirally connected with the main shaft front end plate and the main shaft rear end plate, and the driving shaft adopts a lead screw;
by adopting the technical scheme: one end of the main shaft is fixedly arranged on the base, and the screw rod is in screw transmission with a threaded hole of the front end plate of the main shaft and a threaded hole of the rear end plate of the main shaft, so that the position of the driving shaft is adjusted in the axial direction;
a hand wheel is arranged at one end of the driving shaft, which is exposed out of the rear end plate of the main shaft, a pressure rod is arranged at one end of the driving shaft, which is exposed out of the front end plate of the main shaft, the pressure rod sequentially penetrates through the bearing and the end plate of the driving shaft and then is exposed out of the end plate of the driving shaft, and the end plate of the driving shaft is connected with the end;
the driving shaft drives the sliding sleeve to perform position adjustment along the axial direction of the main shaft;
the bearing is simultaneously positioned in the first sinking platform on the end surface of the end plate of the driving shaft and the second sinking platform on the end surface of the sliding sleeve.
In an embodiment of the present invention, the linkage mechanism includes a plurality of support rods uniformly distributed around the circumference, two connecting devices are disposed on any one of the support rods at intervals along the axial direction of the main shaft, any one of the connecting devices includes a plurality of pairs of connecting strips uniformly distributed around the circumference, and one end of any one pair of connecting strips is mounted on two sides of the corresponding boss; the other ends of any pair of connecting strips are arranged on the two sides of the supporting rod;
a supporting plate is arranged on the end face, away from the main shaft, of any one supporting rod and is connected with the supporting rod through a plurality of second bolts; the sliding sleeve is provided with a movable supporting rod and a supporting plate through a connecting strip, and the position of the sliding sleeve is adjusted in the circumferential direction of the main shaft;
by adopting the technical scheme: the axial position change of the screw rod transmission is converted into the position change of the end support rod in the circumferential direction through the connecting strip, and the size of the clamp is adjusted for the second time.
In an embodiment of the present invention, the one end of the support rod is provided with two support wheels after passing through the end surface of the positioning plate near one side of the base, and the two support wheels can contact with the end surface of the positioning plate.
In an embodiment of the present invention, two connecting devices in an arbitrary pair of connecting strip one end that is close to the positioning disk all are provided with two supporting wheels, and two supporting wheels are located the positioning disk and keep away from the terminal surface of base one side and can with the end face contact of positioning disk.
In an embodiment of the present invention, the clamping device includes a plurality of pipe positioning plates, and the plurality of pipe positioning plates and the plurality of support rods are arranged in a one-to-one correspondence;
any one pipe fitting positioning plate is located at the other end of the corresponding support rod and connected with the support plate through a plurality of third bolts.
In an embodiment of the present invention, a plurality of third positioning holes are disposed on a center line of any one of the pipe positioning plates, and an end support rod is disposed in one of the third positioning holes;
the end support rods are all positioned on the same circle and are used for clamping or supporting the pipe fittings;
by adopting the technical scheme: the clamping size of the clamp is adjusted by installing the end support rods at different positions on the pipe positioning plate; the driving shaft drives the sliding sleeve to slide on the main shaft, the circumferential position of the end supporting rod is adjusted, the size of the clamp in a large range is adjusted, and clamping of pipe fittings of different specifications is met.
As described above, the utility model provides an adjustable pipe fitting clamp, which has a reasonable structure, and the clamp and the base can be flexibly arranged at the operation position; the size of the clamp can be adjusted in a larger range; the positions of the three end supporting rods are synchronously changed in the circumferential direction, and additional centering is not needed after the assembly of the clamp is finished; the manufacturing is simple and convenient, and the cost is economic; the operation is simple and convenient, the level dependence on operators is low, and the popularization and the application have good economic benefits and social benefits.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic view of the clamp structure of the present invention.
Fig. 3 is a schematic view of the internal installation structure of the main shaft and the sliding sleeve of the present invention.
Fig. 4 is a partially enlarged view a of fig. 2.
In the figure: 1. a main shaft; 2. a main shaft front end plate; 3. a main shaft rear end plate; 4. a drive shaft; 5. a drive shaft end plate; 6. a sliding sleeve; 7. positioning a plate; 8. a support bar; 9. a support plate; 10. an end support bar; 11. a connecting strip; 12. a connecting shaft; 13. a gasket; 14. clamping a needle; 15. a support wheel; 16. a pipe fitting positioning plate; 17. a pressure lever; 18. a hand wheel; 19. a bearing; 20. a base; 601. and (4) a boss.
Detailed Description
The following description is provided for illustrative purposes, and other advantages and features of the present invention will become apparent to those skilled in the art from the following detailed description.
Please refer to fig. 1 to 4. It should be understood that the structure, ratio, size and the like shown in the drawings attached to the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limit conditions that the present invention can be implemented, so that the present invention has no technical essential meaning, and any structure modification, ratio relationship change or size adjustment should still fall within the scope that the technical content disclosed in the present invention can cover without affecting the function that the present invention can produce and the purpose that the present invention can achieve. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for convenience of description, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof may be made without substantial technical changes, and the present invention is also regarded as the scope of the present invention.
As shown in fig. 1, the utility model provides an adjustable pipe fitting clamp, which comprises a base 20, wherein a transmission mechanism is arranged on the base 20, the transmission mechanism is connected with a clamping device through a linkage mechanism and drives the clamping device to move, and the clamping device is of a jaw structure and can clamp or support a pipe fitting;
the transmission mechanism converts the axial position change into the circumferential size change of the linkage mechanism, so as to drive the clamping device to clamp or support the pipe fitting;
the transmission mechanism comprises a fixed end, the fixed end comprises a main shaft 1, one end of the main shaft 1 is fixedly arranged on the base 20, and the other end of the main shaft 1 is sequentially provided with a positioning disc 7 and a linkage mechanism towards the direction of the base 20;
by adopting the technical scheme: the base provides support for the whole clamp structure, and the height of the base can be adjusted according to the size of the pipe fitting; providing an axially adjusted position reference through a positioning disc;
as shown in fig. 3, a main shaft front end plate 2 is arranged at one end in the main shaft 1, a main shaft rear end plate 3 is arranged at the other end in the main shaft 1, two support cylinders arranged at intervals are arranged between the main shaft rear end plate 3 and the positioning disk 7, and both the two support cylinders are fixedly mounted on the base 20;
the outer ring of the main shaft 1 where the main shaft front end plate 2 is located is provided with a sliding sleeve 6, two ends of the sliding sleeve 6 are provided with connecting blocks which are arranged at intervals, the outer ring of each connecting block is provided with a plurality of bosses 601 which are uniformly distributed around the circumference, and the bosses 601 are provided with first positioning holes;
the centers of the main shaft front end plate 2 and the main shaft rear end plate 3 are both provided with a driving shaft 4, and the driving shaft 4 is spirally connected with the main shaft front end plate 2 and the main shaft rear end plate 3; the driving shaft adopts a screw rod; by adopting the technical scheme: one end of the main shaft is fixedly arranged on the base, and the screw rod is in screw transmission with a threaded hole of the front end plate of the main shaft and a threaded hole of the rear end plate of the main shaft, so that the position of the driving shaft is adjusted in the axial direction;
a hand wheel 18 is arranged at one end of the driving shaft 4, which is exposed out of the rear end plate 3 of the main shaft, a pressure lever 17 is arranged at one end of the driving shaft 4, which is exposed out of the front end plate 2 of the main shaft, the pressure lever 17 sequentially penetrates through a bearing 19 and the end plate 5 of the driving shaft and then is exposed out of the driving shaft, the end plate 5 of the driving shaft and the pressure lever 17 are in interference fit connection through the bearing 19, and the end plate 5 of the driving;
the driving shaft end plate 5 is connected with the end face of the sliding sleeve 6 through a plurality of first bolts, and the driving shaft 4 drives the sliding sleeve 6 to carry out position adjustment along the axial direction of the main shaft 1;
the bearing 19 is positioned in a first sinking platform on the end surface of the driving shaft end plate 5 and a second sinking platform on the end surface of the sliding sleeve 6;
as shown in fig. 2, the linkage mechanism includes a plurality of support rods 8 uniformly distributed around the circumference, two connecting devices are arranged on any one support rod 8 at intervals along the axial direction of the main shaft 1, any one connecting device includes a plurality of pairs of connecting strips 11 uniformly distributed around the circumference, and one end of any pair of connecting strips 11 is installed on two sides of the corresponding boss 601;
the other ends of any pair of connecting strips 11 are arranged at the two sides of the supporting rod 8; the support rod 8 is provided with a second positioning hole;
the connecting bar 11 is respectively assembled with the first positioning hole of the sliding sleeve 6 and the second positioning hole of the supporting rod 8 through the connecting shaft 12,
as shown in fig. 4, the connecting shaft 12 is respectively position-limited by the spacers 13 and the clamping pins 14 at both ends;
a supporting plate 9 is arranged on the end face, away from the main shaft 1, of any one supporting rod 8, and the supporting plate 9 is connected with the supporting rods 8 through a plurality of second bolts;
the sliding sleeve 6 drives the supporting rod 8 and the supporting plate 9 to perform position adjustment in the circumferential direction of the main shaft 1 through the connecting strip 11; by adopting the technical scheme: the axial position change of the screw rod transmission is converted into the position change of the end support rod in the circumferential direction through the connecting strip, and the size of the clamp is adjusted for the second time;
one end of the supporting rod 8 penetrates through the position groove of the positioning disc 7, two supporting wheels 15 are arranged on one side of the supporting rod 8 close to the base 20, and the two supporting wheels 15 are positioned on the end face of the positioning disc 7 close to one side of the base 20 and can be in contact with the end face of the positioning disc 7;
two supporting wheels 15 are arranged at one end of any pair of connecting strips 11 of the two connecting devices, which are close to the positioning disk 7, and the two supporting wheels 15 are positioned on the end surface of the positioning disk 7, which is far away from the base 20 and can be contacted with the end surface of the positioning disk 7;
the clamping device comprises a plurality of pipe positioning plates 16, and the pipe positioning plates 16 and the support rods 8 are arranged in a one-to-one correspondence manner;
any one pipe positioning plate 16 is positioned at the other end of the corresponding support rod 8 and connected with the support plate 9 through a plurality of third bolts;
a plurality of third positioning holes which are arranged at intervals are formed in the central line of any one of the pipe fitting positioning plates 16, and an end support rod 10 is arranged in one of the third positioning holes; the end support rod 10 is assembled at a proper position of the pipe positioning plate 16 according to the size of the pipe;
the end support rods 10 are all positioned on the same circle, and the end support rods 10 are used for clamping or supporting the pipe fittings; by adopting the technical scheme: the clamping size of the clamp is adjusted by installing the end support rods at different positions on the pipe positioning plate; the driving shaft drives the sliding sleeve to slide on the main shaft, the circumferential position of the end supporting rod is adjusted, the size of the clamp in a large range is adjusted, and clamping of pipe fittings of different specifications is met.
During specific implementation, the driving shaft 4 is rotated through the hand wheel 18, the driving shaft end plate 5 drives the sliding sleeve 6 to move in the axial direction of the main shaft 1, so that the connecting strip 11 drives the supporting rod 8 to move in the circumferential direction of the main shaft 1, the supporting plate 9, the pipe fitting positioning plate 16 and the end supporting rod 10 are driven to move in the circumferential direction, and the purpose of adjusting the size of the clamp is achieved.
The utility model discloses an installation step: the structural dimensions and height of the base 20 are prefabricated in advance according to the dimensions of the pipe; the main shaft 1 is arranged on the base 20 through the supporting cylinder of the main shaft 1; installing a main shaft front end plate 2 and a main shaft rear end plate 3, installing a positioning disc 7, sleeving a sliding sleeve 6 outside a main shaft 1, penetrating a driving shaft 4 through threaded holes of the main shaft front end plate 2 and the main shaft rear end plate 3 for assembly, and installing a pressure rod 17 at one end of the driving shaft 4; assembling a bearing 19 and a driving shaft end plate 5 in an interference manner, then assembling the bearing 19 and a pressure rod 17 in an interference manner, connecting the driving shaft end plate 5 and a sliding sleeve 6 by using a first bolt, installing a connecting shaft 12 in a first positioning hole of the sliding sleeve 6 and two second positioning holes of a supporting rod 8, installing connecting strips 11 at two sides of the first positioning hole and the second positioning hole, installing a gasket 13 at the outer side of the connecting strip 11 and clamping a clamping pin 14 into limiting holes at two sides of the connecting shaft 12, installing a supporting wheel 15 at the outer side of the connecting strip 11, close to a positioning disc 7, on the supporting rod 8, installing the supporting wheel 15, the diameter of the supporting wheel 15 is slightly larger than the width of the connecting strip 11, rotating the sliding sleeve 6 to insert the supporting rod 8 into a position groove of the positioning disc 7, installing the connecting shaft 12 in the second positioning hole of the supporting rod 8, further installing the supporting wheel 15 and the clamping pin 14, when the supporting rod 8 moves in the position groove of, further connect the backup pad 9 with the bracing piece 8 through the second bolt, connect pipe fitting locating plate 16 with the backup pad 9 through the third bolt, repeat the same step and install another two sets of bracing pieces 8, backup pad 9 and pipe fitting locating plate 16 structures, install hand wheel 18 at the other end of drive shaft 4, select suitable hole installation end bracing piece 10 on pipe fitting locating plate 16 according to pipe fitting pipe diameter, stretch into the pipe fitting with end bracing piece 10, rotate hand wheel 18 and further adjust the position of end bracing piece 10 in order to adapt to the pipe fitting size in the circumference.
In summary, the utility model provides an adjustable pipe fitting clamp, which has reasonable structure, and the clamp can be flexibly arranged at an operation position together with a base; the size of the clamp can be adjusted in a larger range; the positions of the three end supporting rods are synchronously changed in the circumferential direction, and additional centering is not needed after the assembly of the clamp is finished; the manufacturing is simple and convenient, and the cost is economic; simple operation and low level dependence on operators. Therefore, the utility model effectively overcomes various defects in the prior art and has high industrial utilization value.
The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (10)
1. An adjustable pipe clamp, includes base (20), its characterized in that: the pipe fitting clamping device is characterized in that a transmission mechanism is arranged on the base (20), the transmission mechanism is connected with the clamping device through a linkage mechanism and drives the clamping device to move, and the clamping device is of a clamping jaw structure and can clamp or support a pipe fitting.
2. An adjustable pipe clamp as claimed in claim 1, wherein: the transmission mechanism converts the axial position change into the circumferential size change of the linkage mechanism, so as to drive the clamping device to clamp or support the pipe fitting.
3. An adjustable pipe clamp as claimed in claim 2, wherein: the transmission mechanism comprises a fixed end, the fixed end comprises a main shaft (1), one end of the main shaft (1) is fixedly installed on the base (20), and the other end of the main shaft (1) is sequentially provided with a positioning disc (7) and a linkage mechanism towards the direction of the base (20).
4. An adjustable pipe clamp as claimed in claim 3, wherein: a main shaft front end plate (2) is arranged at one end in the main shaft (1), a main shaft rear end plate (3) is arranged at the other end in the main shaft (1), two supporting cylinders which are arranged at intervals are arranged between the main shaft rear end plate (3) and the positioning disc (7), and the two supporting cylinders are fixedly arranged on the base (20);
the outer ring of the main shaft (1) where the main shaft front end plate (2) is located is provided with a sliding sleeve (6), the two ends of the sliding sleeve (6) are provided with connecting blocks which are arranged at intervals, and the outer ring of each connecting block is provided with a plurality of bosses (601) which are uniformly distributed around the circumference.
5. An adjustable pipe clamp as claimed in claim 4, wherein: the centers of the main shaft front end plate (2) and the main shaft rear end plate (3) are both provided with a driving shaft (4), and the driving shaft (4) is spirally connected with the main shaft front end plate (2) and the main shaft rear end plate (3);
a hand wheel (18) is arranged at one end, exposed out of the rear end plate (3) of the main shaft, of the driving shaft (4), a pressing rod (17) is arranged at one end, exposed out of the front end plate (2) of the main shaft, of the driving shaft (4), the pressing rod (17) sequentially penetrates through a bearing (19) and the driving shaft end plate (5) to be exposed out of the driving shaft end plate, the driving shaft end plate (5) is connected with the end face of the sliding sleeve (6) through a plurality of first bolts, and the driving shaft (4) drives the sliding sleeve (6) to perform position adjustment;
the bearing (19) is simultaneously positioned in a first sinking platform on the end surface of the driving shaft end plate (5) and a second sinking platform on the end surface of the sliding sleeve (6).
6. An adjustable pipe clamp as claimed in claim 5, wherein: the linkage mechanism comprises a plurality of supporting rods (8) which are uniformly distributed around the circumference, two connecting devices which are arranged along the axial direction of the main shaft (1) at intervals are arranged on any one supporting rod (8), any one connecting device comprises a plurality of pairs of connecting strips (11) which are uniformly distributed around the circumference, and one end of each pair of connecting strips (11) is arranged on two sides of the corresponding boss (601); the other ends of any pair of connecting strips (11) are arranged on the two sides of the supporting rod (8);
a supporting plate (9) is arranged on the end face, away from the main shaft (1), of any one supporting rod (8), and the supporting plate (9) is connected with the supporting rod (8) through a plurality of second bolts;
the sliding sleeve (6) drives the supporting rod (8) and the supporting plate (9) to carry out position adjustment in the circumferential direction of the main shaft (1) through the connecting strip (11).
7. An adjustable pipe clamp as claimed in claim 6, wherein: one end of the supporting rod (8) penetrates through the end face of the positioning disc (7) close to one side of the base (20) and then is provided with two supporting wheels (15), and the two supporting wheels (15) can be in contact with the end face of the positioning disc (7).
8. An adjustable pipe clamp as claimed in claim 7, wherein: two connecting device in be close to arbitrary a pair of connecting strip (11) one end of positioning disk (7) all be provided with two supporting wheels (15), two supporting wheels (15) are located positioning disk (7) and keep away from the terminal surface of base (20) one side and can with the terminal surface contact of positioning disk (7).
9. An adjustable pipe clamp as claimed in claim 8, wherein: the clamping device comprises a plurality of pipe positioning plates (16), and the pipe positioning plates (16) and the support rods (8) are arranged in a one-to-one correspondence manner;
any one pipe fitting positioning plate (16) is positioned at the other end of the corresponding supporting rod (8) and is connected with the supporting plate (9) through a plurality of third bolts.
10. An adjustable pipe clamp as claimed in claim 9, wherein: a plurality of third positioning holes which are arranged at intervals are formed in the central line of any one pipe fitting positioning plate (16), and an end supporting rod (10) is arranged in one of the third positioning holes;
the end support rods (10) are all located on the same circle, and the end support rods (10) are used for clamping or supporting the pipe fittings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020963194.6U CN212398833U (en) | 2020-05-29 | 2020-05-29 | Adjustable pipe fitting anchor clamps |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020963194.6U CN212398833U (en) | 2020-05-29 | 2020-05-29 | Adjustable pipe fitting anchor clamps |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212398833U true CN212398833U (en) | 2021-01-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020963194.6U Active CN212398833U (en) | 2020-05-29 | 2020-05-29 | Adjustable pipe fitting anchor clamps |
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| CN (1) | CN212398833U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116727987A (en) * | 2023-08-10 | 2023-09-12 | 山东天马泰山机械集团有限公司 | Clamping mechanism for welding rotary metal pipe fittings |
-
2020
- 2020-05-29 CN CN202020963194.6U patent/CN212398833U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116727987A (en) * | 2023-08-10 | 2023-09-12 | 山东天马泰山机械集团有限公司 | Clamping mechanism for welding rotary metal pipe fittings |
| CN116727987B (en) * | 2023-08-10 | 2023-10-20 | 山东天马泰山机械集团有限公司 | Clamping mechanism for welding rotary metal pipe fittings |
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