CN113600645A - Pipeline roundness adjusting device - Google Patents
Pipeline roundness adjusting device Download PDFInfo
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- CN113600645A CN113600645A CN202110817755.0A CN202110817755A CN113600645A CN 113600645 A CN113600645 A CN 113600645A CN 202110817755 A CN202110817755 A CN 202110817755A CN 113600645 A CN113600645 A CN 113600645A
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- 230000005540 biological transmission Effects 0.000 claims description 6
- 238000000034 method Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
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- 239000000463 material Substances 0.000 description 1
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- 239000010959 steel Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D3/00—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts
- B21D3/14—Recontouring
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Abstract
The application provides a pipeline roundness adjusting device, wherein one end of one first supporting rod is hinged to one end of one second supporting rod, and the other end of the first supporting rod is hinged to one end of a first central hinge seat; the other end of the first central hinge base is hinged to one end of the other first supporting rod, and the other end of the other first supporting rod is hinged to one end of the other second supporting rod; the other end of one of the second supporting rods is hinged to one end of a second central hinge seat, and the other end of the second central hinge seat is hinged to the other end of the other second supporting rod; the two ends of the tightening structure respectively penetrate through the centers of the first center hinge seat and the second center hinge seat, and the first center hinge seat and the second center hinge seat are movably sleeved on the tightening structure along the directions close to each other. The device has simple structure and convenient use.
Description
Technical Field
The application relates to the field of pipeline construction, in particular to a pipeline roundness adjusting device.
Background
In industrial production, the major diameter pipeline can appear warping seriously because of its dead weight and the reason of steel sheet book system in-process after the preparation is accomplished, and the manufacture process is increased interim support in inside usually, welds in the pipeline inner wall, and the direction of welding process in order to constantly adjust the pipeline is waited to increase the next support after the diameter reaches the requirement again, complex operation, and the material is extravagant serious.
Disclosure of Invention
One of the objectives of the present application is to provide a device for adjusting the roundness of a pipe, which aims to solve the problem that the conventional large-diameter pipe is easy to deform.
The technical scheme of the application is as follows:
a pipeline roundness adjusting device comprises two first supporting rods, two second supporting rods, a first central hinge seat, a second central hinge seat and a tightening structure; one end of one of the first support rods is hinged to one end of one of the second support rods, and the other end of the one of the first support rods is hinged to one end of the first central hinge seat; the other end of the first central hinge base is hinged to one end of the other first supporting rod, and the other end of the other first supporting rod is hinged to one end of the other second supporting rod; the other end of one of the second supporting rods is hinged to one end of the second central hinge seat, and the other end of the second central hinge seat is hinged to the other end of the other second supporting rod; the two ends of the tightening structure respectively penetrate through the centers of the first central hinged seat and the second central hinged seat, and the first central hinged seat and the second central hinged seat are movably sleeved on the tightening structure along the mutually approaching direction.
As a technical scheme of this application, corresponding first bracing piece with it is articulated mutually through top support hinged joint between the second bracing piece.
As a technical scheme of the application, one end of the first support rod is hinged to one side of the jacking hinge seat through a hinge pin shaft, and the other end of the first support rod is hinged to the first central hinge seat through a hinge pin shaft; one end of the second supporting rod is hinged to one side of the top support hinged seat through a hinged pin shaft, and the other end of the second supporting rod is hinged to the second center hinged seat through a hinged pin shaft.
As a technical solution of the present application, the tightening structure includes a central shaft, a first ratchet, a first driver, a second ratchet, and a second driver; the central shaft is provided with a plurality of clamping grooves along the length direction, and two ends of the central shaft respectively penetrate through the first central hinge seat and the second central hinge seat; the first ratchet wheel is meshed with the central shaft through the clamping groove, and the first driver is in transmission connection with the first ratchet wheel and is used for driving the first ratchet wheel to move towards the direction close to the second ratchet wheel; the second ratchet wheel is meshed with the central shaft through the clamping groove, and the second driver is in transmission connection with the second ratchet wheel and is used for driving the second ratchet wheel to move towards the direction close to the first ratchet wheel; the first ratchet wheel and the second ratchet wheel rotate in opposite directions; the first central hinged seat is movably sleeved on the central shaft and is fixedly connected to the first ratchet wheel through a first connecting shaft; the second center hinged seat is movably sleeved on the central shaft and is fixedly connected with the second ratchet wheel through a second connecting shaft.
As a technical scheme of the present application, a first through hole is formed in the middle of the first central hinge base, and a second through hole is formed in the center of the second central hinge base; one end of the central shaft penetrates through the first through hole, and the other end of the central shaft penetrates through the second through hole.
As an aspect of the present application, the first driver includes a large-diameter hand wheel or an electric torque wrench, and the second driver includes a large-diameter hand wheel or an electric torque wrench.
As a technical scheme of this application, first bracing piece with the second bracing piece is the same, first center hinge seat with the hinge seat is the same in second center.
As a technical scheme of the present application, the first central hinge seat is a regular hexagon, and the number of the first support rods is six; the articulated seat in second center is regular hexagon, just the second bracing piece is six.
The beneficial effect of this application:
in the pipeline roundness adjusting device, the plurality of first support rods and the plurality of second support rods support the whole support framework on the surface of the inner wall of the pipeline, and the support framework formed by the plurality of first support rods and the plurality of second support rods is tightened and fixed by the tightening structure; if the roundness of the pipeline is not enough, the inner wall of the pipeline is propped open through the tightening structure, the inner wall of the pipeline keeps the roundness by taking the tightening structure as a circle center, the roundness of the pipelines with different pipe diameters can be adjusted through the supporting framework and the tightening structure, and the pipelines can be disassembled for recycling after being butted. The length of the first supporting rod and the length of the second supporting rod of the device are consistent, so that the distance from the jacking point to the central point can be guaranteed to be consistent, and the roundness of a pipeline is guaranteed. Meanwhile, the first supporting rod is hinged with the second supporting rod through a hinge pin shaft, the first supporting rod is hinged with the first center hinge seat, and the second supporting rod is hinged with the second center hinge seat. In addition, the supporting framework is tightened by tightening the first ratchet wheel and the second ratchet wheel, the first ratchet wheel and the second ratchet wheel can prevent the device from bearing the stress of the supporting framework in the tightening process without sliding, unidirectional tightening is realized, and the supporting framework can be guaranteed to apply force to the inner wall of the pipeline.
Drawings
In order to more clearly explain the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that for those skilled in the art, other related drawings can be obtained from these drawings without inventive effort.
FIG. 1 is a schematic view of a device for adjusting the roundness of a pipe according to a first embodiment of the present disclosure;
fig. 2 is a schematic structural view of a first central hinge seat according to a first embodiment of the present disclosure;
fig. 3 is a schematic diagram of a tightening structure according to the first embodiment of the present application;
fig. 4 is a schematic view illustrating a connection between a first support bar and a second support bar according to a first embodiment of the present application;
FIG. 5 is a schematic view of a central shaft structure according to a first embodiment of the present application;
FIG. 6 is a schematic view illustrating an installation of a roundness adjusting apparatus for pipes according to a first embodiment of the present application;
fig. 7 is a side view of a pipe roundness adjusting apparatus according to a second embodiment of the present application.
Icon: 1-a first support bar; 2-a second support bar; 3-a first central articulated seat; 4-a second central hinged seat; 5-central axis; 6-a first ratchet; 7-a second ratchet wheel; 8-a first connecting shaft; 9-a second connecting shaft; 10-a pipeline; 11-jacking hinged seats.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present application, it should be noted that the terms "upper", "lower", and the like refer to orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are conventionally placed in use, and are used for convenience in describing the present application and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present application.
Further, in the present application, unless expressly stated or limited otherwise, the first feature may be directly contacting the second feature or may be directly contacting the second feature, or the first and second features may be contacted with each other through another feature therebetween, not directly contacting the second feature. Also, the first feature being above, on or above the second feature includes the first feature being directly above and obliquely above the second feature, or merely means that the first feature is at a higher level than the second feature. A first feature that underlies, and underlies a second feature includes a first feature that is directly under and obliquely under a second feature, or simply means that the first feature is at a lesser level than the second feature.
Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present application, it is also to be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
The first embodiment:
referring to fig. 1 and fig. 2 to 6, the present application provides a pipeline roundness adjusting device, which mainly includes two first support rods 1, two second support rods 2, a first central hinge seat 3, a second central hinge seat 4 and a tightening structure; one end of one first supporting rod 1 of the device is hinged to one end of one second supporting rod 2, and the other end of the first supporting rod is hinged to one end of a first central hinge seat 3; the other end of the first central hinge base 3 is hinged to one end of the other first supporting rod 1, and the other end of the other first supporting rod 1 is hinged to one end of the other second supporting rod 2; the other end of one of the second support rods 2 is hinged to one end of a second central hinge seat 4, and the other end of the second central hinge seat 4 is hinged to the other end of the other second support rod 2; the two ends of the tightening structure respectively penetrate through the centers of the first center hinge base 3 and the second center hinge base 4, and the first center hinge base 3 and the second center hinge base 4 are movably sleeved on the tightening structure along the directions close to each other respectively.
It should be noted that the corresponding first support bar 1 and the second support bar 2 are hinged through the top-supporting hinge base 11. Specifically, one end of the first supporting rod 1 is hinged to one side of the jacking hinge seat 11 through a hinge pin shaft, and the other end of the first supporting rod is hinged to the first central hinge seat 3 through a hinge pin shaft; one end of the second support rod 2 is hinged to one side of the top support hinged seat 11 through a hinged pin shaft, and the other end of the second support rod is hinged to the second center hinged seat 4 through a hinged pin shaft.
Further, in the present embodiment, the tightening structure includes a central shaft 5, a first ratchet 6, a first driver, a second ratchet 7, and a second driver; the central shaft 5 is provided with a plurality of clamping grooves along the length direction, and two ends of the central shaft respectively penetrate through the first central hinge base 3 and the second central hinge base 4; the first ratchet wheel 6 is meshed with the central shaft 5 through the clamping groove, and the first driver is in transmission connection with the first ratchet wheel 6 and is used for driving the first ratchet wheel 6 to move towards the direction close to the second ratchet wheel 7; the second ratchet wheel 7 is meshed with the central shaft 5 through the clamping groove, and the second driver is in transmission connection with the second ratchet wheel 7 and is used for driving the second ratchet wheel 7 to move towards the direction close to the first ratchet wheel 6; the first ratchet wheel 6 and the second ratchet wheel 7 rotate in opposite directions; the first central hinged seat 3 is movably sleeved on the central shaft 5 and is fixedly connected to the first ratchet wheel 6 through a first connecting shaft 8; the second central hinge base 4 is movably sleeved on the central shaft 5 and is fixedly connected to the second ratchet wheel 7 through a second connecting shaft 9.
It should be noted that, in this embodiment, a first through hole is formed in the middle of the first central hinge base 3, and a second through hole is formed in the center of the second central hinge base 4; one end of the central shaft 5 passes through the first through hole, and the other end passes through the second through hole.
In this embodiment, the first driver may be a large-diameter handwheel or an electric torque wrench, and the second driver may be a large-diameter handwheel or an electric torque wrench.
It should be noted that, in the present embodiment, the first support rod 1 is the same as the second support rod 2, and the first central hinge seat 3 is the same as the second central hinge seat 4.
The working principle of the pipeline roundness adjusting device is as follows:
firstly, a support framework formed by two first support rods 1 and two second support rods 2 is spread in a pipeline 10, a jacking hinged seat 11 props against the inner wall of the pipeline 10, a central shaft 5 of a tightening structure is threaded, and the central shaft 5 is fixed through a lock catch;
secondly, a central shaft 5 of the tightening structure penetrates through a first through hole of the first central hinge seat 3 and a second through hole of the second central hinge seat 4, a first ratchet wheel 6 of the tightening structure is fixed on the first central hinge seat 3, and a second ratchet wheel 7 of the tightening structure is fixed on the second central hinge seat 4;
thirdly, the distance between the first central hinged seat 3 and the second central hinged seat 4 is tightened through the first ratchet wheel 6 and the clamping groove of the central shaft 5, the second ratchet wheel 7 and the clamping groove of the central shaft 5, so that the supporting framework is forced to support outwards, and the irregular pipeline 10 is rounded;
and step four, after the operation is finished, checking the roundness of the pipeline 10 and carrying out the next process operation.
In summary, in the pipe roundness adjusting device of the present application, the two first support rods 1 and the two second support rods 2 support the entire support framework on the inner wall surface of the pipe 10, and the support framework formed by the two first support rods 1 and the two second support rods 2 is tightened and fixed by the tightening structure; if the roundness of the pipeline 10 is not enough, the inner wall of the pipeline 10 is unfolded through the tightening structure, the inner wall of the pipeline 10 keeps the roundness by taking the tightening structure as a circle center, the roundness of the pipelines 10 with different pipe diameters can be adjusted through the supporting framework and the tightening structure, and the pipelines 10 can be disassembled for recycling after being butted. The length of the first supporting rod 1 and the length of the second supporting rod 2 of the device are consistent, so that the distance from the jacking point to the central point can be guaranteed to be consistent, and the roundness of the pipeline 10 can be guaranteed. Meanwhile, the first supporting rod 1 is hinged with the second supporting rod 2 through a hinge pin shaft, the first supporting rod 1 is hinged with the first center hinge seat 3, and the second supporting rod 2 is hinged with the second center hinge seat 4, so that the whole device can enable the size of the supporting framework to be changed at will in a hinged mode and can adapt to pipelines 10 with different diameters. In addition, the support framework is tightened by tightening the first ratchet wheel 6 and the second ratchet wheel 7, the arrangement of the first ratchet wheel 6 and the second ratchet wheel 7 can prevent the support framework from being stressed and not sliding in the tightening process of the device, unidirectional tightening is realized, and force application of the support framework to the inner wall of the pipeline 10 can be further ensured.
Second embodiment:
referring to fig. 7, the present application provides a device for adjusting roundness of a pipeline, which has a structure substantially the same as that of the first embodiment, except that: in this embodiment, the first central hinge seat 3 may adopt a regular hexagon structure, and the number of the first support rods 1 may adopt six, one end of each first support rod 1 is hinged to the corresponding second support rod 2 through the top support hinge seat 11, and the other end is hinged to the corresponding connecting edge of the first central hinge seat 3 through the hinge pin; the second center hinge seat 4 can adopt a regular hexagon structure, the number of the second support rods 2 can adopt six, one end of each second support rod 2 is hinged to the corresponding first support rod 1 through the top support hinge seat 11, and the other end of each second support rod is hinged to the corresponding connecting edge on the second center hinge seat 4 through the hinge pin shaft.
In addition, it should be noted that, in other embodiments, the first central hinge base 3 of the pipeline roundness adjusting device may also adopt a square structure, a regular octagonal structure, a regular decagonal structure, etc., and the number of the first support rods 1 may also adopt four, eight, or ten, etc., corresponding thereto, and one end of each first support rod 1 is hinged to the corresponding second support rod 2 through the top support hinge base 11, and the other end is hinged to the corresponding connecting edge of the first central hinge base 3 through a hinge pin; the second central hinge seats 4 may also adopt a square structure, a regular octagonal structure, a regular decagon structure, etc., and the number of the second support bars 2 may correspondingly adopt four, eight, or ten, etc., and one end of each second support bar 2 is hinged to the corresponding first support bar 1 through the top supporting hinge seat 11, and the other end is hinged to the corresponding connecting edge on the second central hinge seat 4 through the hinge pin.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (8)
1. A pipeline roundness adjusting device is characterized by comprising at least two first supporting rods, at least two second supporting rods, a first central hinge seat, a second central hinge seat and a tightening structure; one end of one of the first support rods is hinged to one end of one of the second support rods, and the other end of the one of the first support rods is hinged to one end of the first central hinge seat; the other end of the first central hinge base is hinged to one end of the other first supporting rod, and the other end of the other first supporting rod is hinged to one end of the other second supporting rod; the other end of one of the second supporting rods is hinged to one end of the second central hinge seat, and the other end of the second central hinge seat is hinged to the other end of the other second supporting rod; the two ends of the tightening structure respectively penetrate through the centers of the first central hinged seat and the second central hinged seat, and the first central hinged seat and the second central hinged seat are movably sleeved on the tightening structure along the mutually approaching direction.
2. The pipe roundness adjusting apparatus according to claim 1, wherein the corresponding first support bar and the corresponding second support bar are hinged to each other by a jacking hinge base.
3. The pipeline roundness adjusting device according to claim 2, wherein one end of the first support rod is hinged to one side of the jacking hinge base by a hinge pin, and the other end of the first support rod is hinged to the first central hinge base by a hinge pin; one end of the second supporting rod is hinged to one side of the top support hinged seat through a hinged pin shaft, and the other end of the second supporting rod is hinged to the second center hinged seat through a hinged pin shaft.
4. The pipe roundness adjusting apparatus of claim 1, wherein the tightening structure comprises a central shaft, a first ratchet, a first driver, a second ratchet, and a second driver; the central shaft is provided with a plurality of clamping grooves along the length direction, and two ends of the central shaft respectively penetrate through the first central hinge seat and the second central hinge seat; the first ratchet wheel is meshed with the central shaft through the clamping groove, and the first driver is in transmission connection with the first ratchet wheel and is used for driving the first ratchet wheel to move towards the direction close to the second ratchet wheel; the second ratchet wheel is meshed with the central shaft through the clamping groove, and the second driver is in transmission connection with the second ratchet wheel and is used for driving the second ratchet wheel to move towards the direction close to the first ratchet wheel; the first ratchet wheel and the second ratchet wheel rotate in opposite directions; the first central hinged seat is movably sleeved on the central shaft and is fixedly connected to the first ratchet wheel through a first connecting shaft; the second center hinged seat is movably sleeved on the central shaft and is fixedly connected with the second ratchet wheel through a second connecting shaft.
5. The pipeline roundness adjusting device of claim 4, wherein a first through hole is formed in the middle of the first central hinge seat, and a second through hole is formed in the center of the second central hinge seat; one end of the central shaft penetrates through the first through hole, and the other end of the central shaft penetrates through the second through hole.
6. The pipe roundness adjustment device of claim 4, wherein the first driver comprises a large diameter handwheel or an electric torque wrench and the second driver comprises a large diameter handwheel or an electric torque wrench.
7. The pipe roundness adjusting apparatus of claim 1, wherein the first support bar is identical to the second support bar, and the first central hinge seat is identical to the second central hinge seat.
8. The pipe roundness adjusting apparatus according to claim 1, wherein the first central hinge base is a regular hexagon and the first support rods are six; the articulated seat in second center is regular hexagon, just the second bracing piece is six.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110817755.0A CN113600645A (en) | 2021-07-20 | 2021-07-20 | Pipeline roundness adjusting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110817755.0A CN113600645A (en) | 2021-07-20 | 2021-07-20 | Pipeline roundness adjusting device |
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| Publication Number | Publication Date |
|---|---|
| CN113600645A true CN113600645A (en) | 2021-11-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110817755.0A Pending CN113600645A (en) | 2021-07-20 | 2021-07-20 | Pipeline roundness adjusting device |
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| CN (1) | CN113600645A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4140262A (en) * | 1977-04-15 | 1979-02-20 | Midcon Pipeline Equipment Co. | Size-adjustable internal pipe clamp apparatus |
| CN201361642Y (en) * | 2009-04-29 | 2009-12-16 | 中国水利水电第三工程局有限公司 | Device for automatically adjusting roundness and misalignment of hydraulic type penstock |
| CN205129267U (en) * | 2015-10-20 | 2016-04-06 | 广东茂化建集团有限公司 | Group is to ware in pipeline |
| CN208083772U (en) * | 2017-11-28 | 2018-11-13 | 海洋石油工程股份有限公司 | Large-caliber thin-walled pipeline port circularity adjustment device |
| CN109882658A (en) * | 2019-04-12 | 2019-06-14 | 祝传淇 | A kind of adaptable circular tube support frame |
| CN209581811U (en) * | 2018-06-04 | 2019-11-05 | 扬州中远海运重工有限公司 | A kind of adjustable dock blocking of adjustment height |
-
2021
- 2021-07-20 CN CN202110817755.0A patent/CN113600645A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4140262A (en) * | 1977-04-15 | 1979-02-20 | Midcon Pipeline Equipment Co. | Size-adjustable internal pipe clamp apparatus |
| CN201361642Y (en) * | 2009-04-29 | 2009-12-16 | 中国水利水电第三工程局有限公司 | Device for automatically adjusting roundness and misalignment of hydraulic type penstock |
| CN205129267U (en) * | 2015-10-20 | 2016-04-06 | 广东茂化建集团有限公司 | Group is to ware in pipeline |
| CN208083772U (en) * | 2017-11-28 | 2018-11-13 | 海洋石油工程股份有限公司 | Large-caliber thin-walled pipeline port circularity adjustment device |
| CN209581811U (en) * | 2018-06-04 | 2019-11-05 | 扬州中远海运重工有限公司 | A kind of adjustable dock blocking of adjustment height |
| CN109882658A (en) * | 2019-04-12 | 2019-06-14 | 祝传淇 | A kind of adaptable circular tube support frame |
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Application publication date: 20211105 |