• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A web holding tool (20) configured to support a wind turbine blade structural web which web has a length dimension extending along a longitudinal direction (L) from a root end to a tip end, said web being a variable geometry web and having a progressively varying height dimension along its longitudinal direction (L); said tool (20) being configured to support said web in an upright orientation of said web with its height dimension extending vertically; wherein said holding tool (20) comprises two or three or more holding jigs (30), each of which jigs (30) having a stand (50) with a foot (58) configured to rest on a support surface (66) and a web support fixture (40) supported on said stand (50) at a height above said foot (58), said web support fixture (40) including a web support pad (44) configured to support a portion of a said web, wherein said stand (50) includes a web receiving portion (55) extending at a height above said web support fixture (40) wherein said receiving portion (55) defines one or more web contact surface (57); characterised in that each said jig (30) is a variable‐geometry jig capable of dimensional adjustment; said jigs (30) each being capable of being adjusted to engage and support a said variable geometry web at any of different respective locations along the web’s longitudinal direction (L) and in that each said variable geometry jig (30) is configured such that a height (h) of said support pad (44) above said foot (60) is selectably adjustable.
    公开号:DK202000107U1
    申请号:DK202000107U
    申请日:2020-10-21
    公开日:2020-10-27
    发明作者:Pandian Manoharan Murugu；Shah Atin；Kumar Ponmar Nanda Kumar Hemanth；Samuel Samson
    申请人:Vestas Wind Sys As；
    IPC主号:
    专利说明:

    ne DK 2020 00107 U1 The present disclosure relates to a holding tool for holding an elongate web, such as a wind turbine blade structural web. Such webs may be incorporated as longitudinally extending internal structural reinforcements between windward and leeward wind turbine blade shells. A holding tool may be needed for supporting such a web on a production facility floor prior to its placement ina partly finished blade. The structural web may be placed in a wind turbine blade during its manufacture. During blade production it may be beneficial to position a web near a wind turbine blade mould, thereby to allow the web to be picked up by a web placement tool and positioned in the blade at a relevant moment during blade manufacture. A web holding tool which allows pre-alignment of longitudinal segments of a segmented web is known, for example from WO2014094780A1. The tool described in that disclosure comprises multiple individually configured jigs, each jig being spaced apart from neighbouring jigs in a linear arrangement and destined to engage the web at a specific respective position along the web’s length.
    It would be advantageous to hold and present a web in a predetermined, repeatable orientation in such a way that successive webs held in the tool may reliably be grasped in the same way by a placement tool for placing the web in a partially finished wind turbine blade shell. Moreover, the number of different blade types to be made at any manufacturing facility may may require multiple different web holding tools. Accordingly, there is proposed a holding tool comprised of a linear array of multiple jigs, which jigs are each dimensionally adjustable to engage and support different portions along a variable geometry web. Such jigs may thereby also be capable of use with different structural webs e.g. for asame blade or for a different blade, such webs having a different web geometry than a first web. The web holding tool may comprise multiple jigs spaced apart in a longitudinal direction thereby to hold the web in a predefined orientation. The web holding tool may comprise at least two jigs whose geometry is adjustable. In this way, a holding tool may comprise multiple jigs which are the same or substantially identical. This may allow to accommodate different webs, e.g. a longer web may require a longer holding tool than a shorter web, which may be achieved by incorporating 1
    DK 2020 00107 U1 more of the jigs into the holding tool. Alternatively, a design of a web may change, requiring the holding tool to adopt a different geometry. This may be achieved using the same holding tool jigs, by merely adjusting their geometries to the geometry of a new web. At least two jigs in the holding tool may be adjustably configured to be capable of supporting a web at more than one location along the length of the web when in its predefined orientation. Preferably two or more said jigs are of identical or substantially identical construction. Preferably, two or more said jigs of a said holding tool are adjusted to and set in different geometries and are thereafter spaced apart along the length of a web. Preferably, a holding tool may comprise multiple said jigs which, when spaced apart in a longitudinal alignment, define a receiving arrangement for receiving and holding said web. The holding tool may advantageously comprise an end stop arranged at one end thereof and providing an abutment against which an end of a web held in the tool may be brought into contact. This ensures a repeatable longitudinal arrangement of successive webs in a holding tool.
    A holding tool as proposed herein is particularly defined in appended claim 1. Further preferred features thereof are defined in subclaims 2-15. The holding tool and further features thereof are further described with reference to non-limiting, figurative, not-to-scale examples shown in the appended drawings, in which is shown: Figure I: a horizontal axis wind turbine; Figure 2: a simplified exploded view of wind turbine blade shells and an internal structural web; Figure 3: an open wind turbine blade mould; Figure 4: a holding tool and details thereof and including a web supported therein; Figure 5: a side view of a holding tool on a support surface and holding a web; Figure 5a: an enlarged front view of a jig of a holding tool holding a web; Figures 6a-c: front, side and top views of a jig of a holding tool; Figure 7: an exploded view showing parts of a jig of a holding tool; Figure 8: an exploded view of a web holding fixture of a jig of a holding tool.
    2
    DK 2020 00107 U1 The horizontal axis wind turbine 1 illustrated in Fig. 1 includes a nacelle 3 housing power generation elements, set atop a tower 2. A rotor 4 attached to the nacelle 3 comprises a hub 6 to which three blades 7a-c are connected. The blades 7a-c each extend in a spanwise direction S from a root end 8, connected to the hub 6 to a tip end 9. The blade’s elongate shape has a thicker portion at its root 8, tapering down to a slender profile at the tip 9. The blade 7a-c has an aerofoil shape which shape varies along the blade length. The aerofoil extends predominantly in a chordwise direction C, and has a thickness in a thickness-wise direction T. Both the chordwise and thickness-wise dimensions vary along the blade’s length. Typically, the blade has a shoulder portion with a maximum chord dimension. Typically, a blade's maximum thickness may be at its root 8. A blade portion between the tip 9 and the root 8 may be known as the blade mid-portion. Each blade 7a-c may be made from a windward shall 70b and a leeward shell 70a joined together and enclosing one or more structural web 10, as indicated in Figs. 2 and 3. The structural web 10 improves the stiffness and thereby the performance of the blade 7a-c. A web 10 may typically extend longitudinally between a leeward shell 70a and a windward shell 70b and in a spanwise direction of a wind turbine blade 7a-c, which may correspond to a lengthwise extent of the web
    10. As shown in Fig. 2, a web may extend longitudinally from a rootmost end 18 to a tipmost end
    19. In keeping with the evolution of the blade’s progressively decreasing thickness towards the tip 9, typically, a web 10 may have a height which also decreases from its root end 18 towards its tip end 19. The web 10 may thereby have a variable height dimension tapering down from a maximum near its root end 18 to a minimum near its tip end 19. The web 10 may typically extend in height between a lower, foot flange 12 and an upper, top flange 11. In particular, a web 10 may comprise a generally planar longitudinal main section extending in height between a foot flange 12 and a top flange 11. When lifted and positioned in a lower blade shell, such as the windward shell 70b, the web may be bonded to the lower shell at its foot flange 12, and along a bondline indicated by broken lines in Fig. 2. The top flange 11 may be bonded to the opposite shell, in this case, the leeward shell 70a. Advantageously, the bonding operation between a web 10 and blade shells 70a, 70b may be carried out at a blade mould 770, as illustrated in Fig. 3, which shows an open mould including a windward shell mould half 770b and a leeward shell mould half 770a. To facilitate the operation, a web 10 may advantageously be positioned near the blade mould 700, to 3
    DK 2020 00107 U1 be picked up and placed in the mould 770. It is herein proposed to provide an improved holding tool 20 for a web 10, preferably for use at a facility for making wind turbine blades 7a-c.
    A web 10 may be placed in a holding tool 20 per the present specification for the purpose of holding the web 10 ready for introduction into blade shells 70a, 70b in a blade mould 770 during a manufacturing process. To this end, a holding tool 20 may comprise two or more jigs 30 each of which is dimensionally adjustable in at least one dimension thereof. In particular, a web holding tool 20 is configured to support a wind turbine blade structural web 10, which web 10 has a length dimension extending along a longitudinal direction L from a root end 18 to a tip end 19, said web 10 being a variable geometry web and having a progressively varying height dimension along its longitudinal direction L. The holding tool 20 is configured to support the web 10 in an upright orientation of the web 10, with its height dimension extending in a generally vertical direction. The holding tool 20 comprises two or three or more holding jigs 30, each of which has a stand 50 with a foot 58 configured to rest on a support surface 66, and a web support fixture 40 supported on the stand 50 at a height above the foot 58. The web support fixture 40 includes a web support pad 44 configured to support a portion of the web 10, in particular a foot flange 12 thereof. The stand 50 includes a web receiving portion 55 which extends at a height above the web support fixture 40. The web receiving portion 55 defines one or more web contact surface 57. In this way, with a lower portion of the web 10 supported on a web support pad 44 and an upper part of a web 10 resting against a contact surface 57 of a receiving portion of a stand 50, the web 10 is thereby horizontally and laterally engaged and supported by the holding tool 20. This gives the web 10 stability while in the holding tool 20. The jigs 30 are variable-geometry jigs each capable of dimensional adjustment wherein each of the two or three or more jigs 30 of a holding tool 20 is configured to be adjustable to thereby engage and support a variable geometry web 10 at any of — different respective locations along the web's longitudinal direction L. For example, each of the jigs 30 may be adjusted to engage and support said web at a tip portion 19 or root portion 18 or at a mid-portion of a web 10. An example of a holding tool 20 is shown in Figs. 4 and 5, which show a holding tool 20, including a linear array of jigs 30, in which a web 10 is supported at a height h above a support surface 66.
    4
    DK 2020 00107 U1 Two or three or more jigs 30 are preferably the same or substantially identical, and may each be adjusted to accommodate a different part of a dimensionally variable web 10. In embodiments, all the jigs 30 of a holding tool 20 may be the same or substantially identical. In this way, although a web 10 may have a variable geometry, in particular in a lengthways direction [ thereof, the jigs 30 may be adjusted to engage and support any part of a web 10 along its length. A holding tool 20 may thereby comprise multiple jigs 30 arranged along a length axis L on a support surface 66, which may be a production floor, as illustrated in Fig. 4. A jig 30 of a holding tool 20 includes a web support fixture 40 (see detail A in Fig. 4) having a support pad 44 and configured for supporting a lower part of a web 10 such as a foot flange 12 thereof. In embodiments and as illustrated in Figs. 4 and 5, there may be provided a holding tool 20 in which jigs 30 are arranged on a support surface 66 and thereby define a longitudinal axis L over the support surface 66, said jigs 30 including a web tip jig 39 and a web root jig 38, and wherein a support fixture 40 at said web tip jig 39 on said axis L is set at a height h which is higher above said support surface 66 than a support fixture 40 at said web root jig 38. The web 10 may be held in a jig 30 of a holding stand — 20with its height direction generally upright or in generally vertical direction while a flange 11, 12 of the web 10 may extend in a direction generally transverse to the vertical axis. i.e. the flange 11, 12 may extend in a direction having a horizontal component. The jig 30 further includes a stand 50 which supports the web support fixture 40. Preferably, the web support fixture 40 may be height-adjustably supported on the stand 50. The holding tool 20 may further include an end stop 80 (see detail B in Fig. 4). This end stop 80 may include an end plate 85 mounted above an end- stop foot 88 which can support the end stop 80 on a same support surface 66 as the holding tool
    20. The end stop 80 may preferably be positioned on a support surface 66 as part of a holding tool 20, and at one end of a linear array of jigs 30 of a holding tool 20. Preferably, the end stop 80 may be positioned at or nearby a jig 30 of a holding tool which is a root jig 38. A root jig 38 may be the jig 30 of a holding tool 20 which defines the rootmost jig 30 of the holding tool 20. When placing a web 10 in a holding tool 20, the rootmost end 18 of the web 10 may be abutted against the end stop 80, in particular, against an end stop plate 85 thereof. Alternatively, the end stop 80 or an additional end stop may be positioned at or nearby a jig 30 of a holding tool which is a tip jig 39. A tip jig 39 may be the jig 30 of a holding tool 20 which defines the tipmost jig 30 of the holding tool
    20. When placing a web 10 in a holding tool 20, the tipmost end 18 of the web 10 may be abutted 5
    DK 2020 00107 U1 against the end stop 80, in particular, against an end stop plate 85 thereof. The end stop 80 thereby provides a reference surface for precisely and repeatably positioning the web 10 in a longitudinal direction in the holding tool 20. In this way, when the web 10 is picked up by a positioning tool (not shown) it may be reliably and repeatedly grasped at the same longitudinal location, which may aid the subsequent correct positioning of the web 10 in a blade mould 770.
    Therefore, in aspects, the holding tool 20 may including an end stop 80 having an end plate 85 supported on a foot 88, which foot 88 is configured to rest on a support surface 66. Optionally, an end plate 85 may be height-adjustably mounted on said foot 88.
    — Fig. 5a shows a section taken at 5a from the view shown in Fig. 5 and in which optional details of an exemplary jig 30 of a holding tool 20 can be seen. A cross section through a web 10 in the jig 30 is also to be seen in Fig. 5a. The web 10 is shown supported with its foot flange 12 on a web support pad 44 of a web fixture 40 and with an upper part of the web 10 resting against a contact surface 57 of a web receiving portion 55 of a stand 50 of a jig 30. Each said variable geometry jig 30 is configured such that a height h of the support pad 44 above the foot 60 is selectably adjustable. This may be achieved for example in that a web support pad 44 may be height- adjustably supported on a stand 50. Accordingly, the height h of the support pad 44 above the support surface 66 may be adjusted. In this way, the varying height dimension of a web 10 may be accommodated for from one jig 30 to another in a holding tool 20. For example, a jig 30 near a root end 18 of a web 10 may have a support pad 44 adjusted and set at a lower height h than the support pad 44 in a jig 30 near a tip end 19 of a web 10. In this way, if preferred, the main axis of a web 10 may be kept horizontal, or substantially horizontal or level with the spanwise extend of a blade shell in a mould 770. Height adjustability of a web support pad 44 may alternatively be achieved in that a height hh of the support pad 44 above the web support fixture 40 may be — selectably adjustable. Optionally, with a web support pad 44 comprised in the web support fixture 40, the web support fixture 40 may be fixable to the stand 50 such that a height hf of the web support fixture 40 above said foot 58 is selectably adjustable, thereby correspondingly also adjusting the height of the web support pad 44. A height adjustable support pad 44 may thereby be selectably raised or lowered and set at a desired height.
    6
    DK 2020 00107 U1 A web flange be it a foot flange 12 or a top flange 11 may extend substantially perpendicular to a main panel 15 of a web 10. Alternatively, and in accordance with the particular internal geometry of a wind turbine blade shells 70a, 70b, web flanges 11, 12 may extend at an inclined angle in relation to a purely transverse direction relative to a main web panel 15. The web cross section shown in Fig. 5a shows an example of a web 10 whose flanges 11, 12 are inclined in relation to the main panel 15. In some designs, the inclination angle of a web flange 11, 12 may vary along the length of a web 10. Consequently, it is optionally proposed to provide the web support pad 44 such that it may be pivotably received on a web fixture 40. In this way, a preferably planar web support surface 46 of the web support pad 44 may be inclined and set at an angle a suited to the particular location along the web 10 which is resting on and supported by the web support pad 44. Accordingly, each support pad 44 of a jig 30 may be adjustably variably inclined about an axis x parallel to the length direction I of a web 10 when supported in a jig 30, such that a web support surface 46 at a web support pad 44 can selectably define a variable inclination angle a., as can be seen for example in Fig. 5a or Fig 6a or Fig. 8. Optionally, as may be seen notably in Fig. 8 and others, a support pad 44 may be pivotably received in a support bracket 45 of a support fixture 40. The support pad 44 may be selectably inclined in a support bracket 45. Preferably, a support bracket 45 may include a fixing element 47 for setting a selected inclination angle a of a web support surface 46. Preferably a fixing element 47 may comprise or include a locking pin, for example as shown in Fig. 8. Thereby, optionally, a web support pad 44 may be adjustable in inclination, thereby to selectably allow adjustment and setting of a support angle of said web- support surface 46. Preferably, an inclination of the web support surface 46 may be adjustable about an axis x parallel to a longitudinal direction I of a web 10 supported in a jig 30. For webs 10 with steep tapering of their height dimension along their length direction, optionally or additionally, an inclination of the web support surface 46 may be adjustable about an axis (not shown) transverse to a longitudinal direction of a web supported in the jig 30. In embodiments, a web support fixture 40 of a jig 30 of a holding tool 20 may further include a bridge 48, fixable to a stand 50 of a jig 30. Preferably, a support pad 44 may be mounted on a said bridge 48. The bridge 48, when connected to a stand 50, may thus serve as a platform for supporting a web support pad 44. In still further embodiments, and as illustrated in Fig. 7 or Fig. 8
    7
    DK 2020 00107 U1 or Figs 5a and 6a, each support pad 44 may be height-adjustably supported on a said bridge 48, preferably via a height adjustment element 49, whose length can be selected and fixed. Preferably, and as illustrated, a support pad 44 is received in a support bracket 45, which web support bracket 45 is height-adjustably supported on the bridge 48 via a height adjustment element 49. As can be seen in Figs. 7 and 8, for example, a height adjustment element 49 may include a vertical stem resting on a bridge 48 of the web support fixture 40 and supporting a support bracket 45 in which a web support pad 44 is received. The stem may be height-adjustably supported on the bridge 48 using e.g. screw elements such as bolts. The vertical stem may be a threaded stem.
    As mentioned, a web 10 supported in a holding tool may be supported from beneath on a support pad 44 of a jig 30 and may be supported laterally by simultaneously resting on a receiving portion 55 of a stand 50. In embodiments, a stand 50 of a jig 30 may be in the form of a pillar comprising a lower, pedestal portion 52 associated with the foot 58 of the jig 30, and an upper, receiving portion 55. The receiving portion 55 may comprise a contact surface 57 against which a web 10 in the jig 30 may rest and find support. The receiving portion 55 may preferably be releasably joined to a pedestal portion 52, as can be seen for example in Fig. 7. The receiving portion 55 is preferably height-adjustably mounted on the pedestal portion 52 such that the overall jig height H of a jig 30 above the support surface 66, or above the foot 58, is thereby variable and adjustable.
    The elements of a holding tool 20 thereby allow considerable adjustability to accommodate webs 10 having significantly varying geometries. Furthermore, optionally a height HH of the receiving portion 55 above a support pad 44 of a jig may be selectably adjustable. In embodiments, and advantageously, the stand 50 of the jigs 30 may comprise two upright pillars, for example parallel side-by-side pillars with a space in between. In this way, a web 10 may be supported between two adjacent pillars which make up a stand 50. This arrangement may provide improved engagement and stability to a web 10 in a holding tool 20. The arrangement may give additional stability to the holding tool 20 itself, and to the jigs 30 thereof. For example, a web support fixture 40 may be supported between two adjacent pillars which make up a stand 50. In embodiments a bridge 48 of a web support fixture 40 may be fixed between two adjacent pillars of a stand 50. Preferably, the bridge may be height-adjustably fixed between two pillars of a stand 50. Optionally, a 8
    DK 2020 00107 U1 receiving portion 55 of a stand 50 of a jig 30 may define a mouth 56, preferably a funnel shaped mouth 56 — e.g. as shown in Figures 5a, 6a and 7 - for easily guiding and receiving a said web into a jig 30. With parallel pillars as a stand 50 of a jig, the holding tool 20 may provide a channel extending along a length direction L for receiving and supporting a longitudinally extending web
    10. With additional adjustability, as described, by way of height adjustability of a web support pad 44 and optionally of receiving portions 55 at an upper part of each jig 30, the holding tool 20 may be ideally configured for holding and supporting a web 10 in a predetermined arrangement. For any new web 10 to be used in a production process, the same holding tool 20 may be re-used merely by reconfiguring the jigs 30 to engage and support a different shaped web 10. Preferably, an array of jigs 30 in a holding tool 20 may include three or four or more said identical jigs 30. 9
    权利要求:
    Claims (15)
    [1] 1. A web holding tool (20) configured to support a wind turbine blade structural web which web has a length dimension extending along a longitudinal direction (£) from a root end to a tip end, said web being a variable geometry web and having a progressively varying height dimension along its longitudinal direction (L); said tool (20) being configured to support said web in an upright orientation of said web with its height dimension extending vertically; wherein said holding tool (20) comprises two or three or more holding jigs (30), each of which jigs (30) having a stand (50) with a foot (58) configured to rest on a support surface (66) and a web support fixture (40) supported on said stand (50) at a height above said foot (58), said web support fixture (40) including a web support pad (44) configured to support a portion of a said web, wherein said stand (50) includes a web receiving portion (55) extending at a height above said web support fixture (40) wherein said receiving portion (55) defines one or more web contact surface (57); characterised in that each said jig (30) is a variable-geometry jig capable of dimensional adjustment; said jigs (30) each being capable of being adjusted to engage and support a said variable geometry web at any of different respective locations along the web’s longitudinal direction (L) and in that each said variable geometry jig (30) is configured such that a height (h) of said support pad (44) above said foot (60) is selectably adjustable.
    [2] 2. Holding tool (20) according to claim 1, wherein a height (hh) of said support pad (44) above said web support fixture (40) is selectably adjustable.
    10
    DK 2020 00107 U1
    [3] 3. Holding tool (20) according to claim 1 or 2, wherein said web support fixture (40) is fixable to said stand (50) such that a height (hf) of said web support fixture (40) above said foot (58) is selectably adjustable.
    [4] 4. Holding tool according to any preceding claim 1, wherein each said each support pad (44) of a said jig (30) is pivotably received in said web support fixture (40).
    [5] 5. Holding tool according to claim 4, wherein each said each support pad (44) of a said jig (30) can be adjustably variably inclined about an axis (x) parallel to the length direction (L) of a web when supported in said jig (30), such that a web support surface (46) at said web support pad (44) can selectably define a variable inclination angle (a).
    [6] 6. Holding tool (20) according to claim 4 or 5, wherein said support pad (44) is pivotably received in a support bracket (45) of said support fixture (40).
    [7] 7. Holding tool (20) according to claim 6, wherein said support pad (44) can be selectably inclined in said support bracket (45), said support bracket (45) including a fixing element (47) for setting said selected inclination angle (a) of said web support surface (46); preferably wherein said fixing element (47) includes a locking pin.
    [8] 8. Holding tool (20) according to claim 1, wherein each web support fixture (40) further includes a bridge (48), wherein said bridge (48) is fixable to said stand (50), and wherein said support pad (44) is mounted on said bridge (48). 11
    DK 2020 00107 U1
    [9] 9. Holding tool (20) according to claim 8, wherein each support pad (44) is height-adjustably supported on said bridge (48) via a height adjustment element (49), whose length can be selected and fixed.
    [10] 10. Holding tool (20) according to claim 1, wherein said stand (50) of each said jig (30) is in the form of a pillar comprising a pedestal portion (52) associated with said foot (58) and a said receiving portion (55), which receiving portion (55) is height-adjustably mounted on said pedestal portion (52) such that the overall jig height (H) of a said jig (30) above said support surface (66)is thereby variable and adjustable.
    [11] 11. Holding tool (20) according to claim 10, wherein a height (HH) of said receiving portion (55) above said support pad (44) is selectably adjustable.
    [12] 12. Holding tool (20) according to claim 1 or claim 10, wherein said stand (50) of each said jig (30) comprises two upright pillars, and wherein said web support fixture (40) is supported between said pillars, preferably wherein said stand (50) comprises substantially parallel upright pillars, and wherein said receiving portion (55) of said stand (50) of a jig (30) defines a mouth (70), preferably a funnel shaped mouth (70), for receiving a said web into said jig (30).
    [13] 13. Holding tool (20) according to claim 1, including three or four or more said identical jigs (30).
    [14] 14. Holding tool (20) according to claim 1, wherein said jigs (30) of said holding tool (20) are arranged on a said support surface (66) and define a longitudinal axis (L) over said support 12
    DK 2020 00107 U1 surface (66), said jigs (30) including a web tip jig (39) and a web root jig (38), and wherein a support fixture (40) at said web tip jig (39) on said axis (L) is set at a height (h) which is higher above said support surface (66) than a support fixture (40) at said web root jig (38).
    [15] 15. Holding tool (20) according to any previous claim, further including an end stop (80) having an end plate (85) supported on a foot (88), which foot (88) is configured to rest on a said support surface (66). 13
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    同族专利:
    公开号 | 公开日
    DK202000107Y3|2020-12-04|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    2020-10-27| UAT| Utility model published|Effective date: 20201021 |
    2020-12-04| UME| Utility model registered|Effective date: 20201204 |
    优先权:
    申请号 | 申请日 | 专利标题
    DKBA202000107U|DK202000107Y3|2020-10-21|2020-10-21|Beam stand|DKBA202000107U| DK202000107Y3|2020-10-21|2020-10-21|Beam stand|
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