CN114147977A - Mark3 liquid dome material hole plug manufacturing auxiliary device, manufacturing method and plug - Google Patents

Mark3 liquid dome material hole plug manufacturing auxiliary device, manufacturing method and plug Download PDF

Info

Publication number
CN114147977A
CN114147977A CN202111389068.XA CN202111389068A CN114147977A CN 114147977 A CN114147977 A CN 114147977A CN 202111389068 A CN202111389068 A CN 202111389068A CN 114147977 A CN114147977 A CN 114147977A
Authority
CN
China
Prior art keywords
adjusting screw
frame
rectangular frame
mark3
frame body
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN202111389068.XA
Other languages
Chinese (zh)
Other versions
CN114147977B (en
Inventor
李宁
黄华兵
李洪超
许安心
范文韬
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hudong Zhonghua Shipbuilding Group Co Ltd
Original Assignee
Hudong Zhonghua Shipbuilding Group Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hudong Zhonghua Shipbuilding Group Co Ltd filed Critical Hudong Zhonghua Shipbuilding Group Co Ltd
Priority to CN202111389068.XA priority Critical patent/CN114147977B/en
Priority claimed from CN202111389068.XA external-priority patent/CN114147977B/en
Publication of CN114147977A publication Critical patent/CN114147977A/en
Application granted granted Critical
Publication of CN114147977B publication Critical patent/CN114147977B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/78Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16BDEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B11/00Connecting constructional elements or machine parts by sticking or pressing them together, e.g. cold pressure welding
    • F16B11/006Connecting constructional elements or machine parts by sticking or pressing them together, e.g. cold pressure welding by gluing
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29LINDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00Other particular articles
    • B29L2031/30Vehicles, e.g. ships or aircraft, or body parts thereof
    • B29L2031/3067Ships

Abstract

The invention relates to an auxiliary device, a manufacturing method and a plug for manufacturing a MARK3 liquid dome material hole plug, wherein the auxiliary device comprises a rectangular frame body and a plurality of spider legs symmetrically distributed along the four sides of the rectangular frame body, each spider leg comprises an adjusting screw rod and a supporting leg, the supporting leg is installed at one end of the adjusting screw rod, the adjusting screw rod is perpendicular to one side of the rectangular frame body, and the adjusting screw rod is parallel to the surface formed by the four sides of the rectangular frame body; the support legs are positioned in the rectangular frame; and the adjusting screw rod is in threaded fit with the rectangular frame body. During the preparation stopper, establish the outside at insulating module with the rectangle framework cover, press from both sides through the round spider and support the plywood, fix the plywood on insulating module, guarantee that the plywood is firm in the outside installation of insulating module, promoted the off-the-shelf quality of final stopper and satisfied the sealed demand in material hole.

Description

Mark3 liquid dome material hole plug manufacturing auxiliary device, manufacturing method and plug
Technical Field
The invention relates to the field of shipbuilding, in particular to an auxiliary device for manufacturing a MARK3 liquid dome material hole plug, a manufacturing method and a plug.
Background
In the cargo tank containment system MARK3 model, the order of construction is followed. Mainly comprises the work of the conventional area construction and ending stages. The conventional area construction refers to the module installation of a standard area and the module installation of a corner area. And after the installation and the check in the areas are finished, the work of the ending stage is started. The final stage work mainly comprises the hole opening position of the side and the work of the liquid dome area, and in the prior art, the precision requirement of the liquid dome area is higher due to the existence of the composite dome. And finally installing the plug of the material hole after all ending work is finished. The last process of the liquid cargo tank is successful or not, and whether the manufacturing of the material hole plug meets the requirements or not can not ensure that the cargo tank is manufactured on the material hole plug without leakage.
Disclosure of Invention
In order to meet the requirement for processing the material hole plug, the invention provides an auxiliary device for manufacturing the MARK3 liquid dome material hole plug, a manufacturing method and a plug, so that the material hole plug is processed smoothly, and the reworking of the manufacturing is avoided.
The technical purpose of the invention is realized by the following technical scheme:
an auxiliary device for manufacturing a MARK3 liquid dome material hole plug structurally comprises a rectangular frame body and a plurality of spider legs symmetrically distributed along four sides of the rectangular frame body, wherein each spider leg comprises an adjusting screw and a supporting leg, the supporting leg is installed at one end of the adjusting screw, the adjusting screw is perpendicular to one side of the rectangular frame body, and the adjusting screw is parallel to a surface formed by the four sides of the rectangular frame body; the support legs are positioned in the rectangular frame; the adjusting screw is installed in threaded fit with the rectangular frame body.
Furthermore, the support legs are movably connected with the end parts of the adjusting screws through spherical shafts.
Further, the other end of the adjusting screw is also provided with a handle for rotating the adjusting screw.
Furthermore, a hexagonal nut used for rotating the adjusting screw rod is fixed on the adjusting screw rod.
Furthermore, the rectangular frame body comprises a first frame, a second frame, a third frame and a fourth frame, the first frame and the second frame are arranged in parallel, and the third frame and the fourth frame are arranged in parallel; adjusting holes for adjusting the position between the third frame and the fourth frame are formed in the two ends of the first frame and the two ends of the second frame, and connecting holes matched with the adjusting holes and penetrating through the connecting pieces are formed in the two ends of the third frame and the fourth frame respectively; the connecting piece is penetrated in the connecting hole, and the distance between the third frame and the fourth frame is adjusted at the position of the adjusting hole by the connecting piece.
Further, the connecting hole is also an adjusting hole.
Further, the adjusting hole is a toothed hole.
Further, the adjusting holes are strip-shaped holes.
A method of making a hole plug for a MARK3 liquid dome, the method comprising the steps of:
s1, welding a plurality of upright posts for installing an insulation module on the square steel plate, wherein the insulation module is provided with a plurality of openings penetrating through two sides of the insulation module; the upper end of the upright post is provided with an external thread, and the external thread is screwed with a limiting block provided with an internal thread;
s2, hoisting the insulation modules, enabling the holes of the insulation modules to be sleeved on the corresponding upright posts, enabling the upper ends of the upright posts to penetrate out of the insulation modules, and rotating the limiting blocks to enable the limiting blocks to clamp the upper ends of the insulation modules;
s3, brushing adhesives on four side faces of the insulating module, and mounting a plywood to enable the plywood to be adhered to the side faces of the insulating module;
s4, arranging the rectangular frame outside the insulating module to enable the plywood on the four sides to be located in the rectangular frame, and rotating the adjusting screw to enable the support legs to abut against the plywood;
s5, after the adhesive is cured, reversely rotating the adjusting screw rod, and removing the rectangular frame body;
and S6, mounting a right-angle protective edge at the splicing corner of the plywood on the side surface of the insulating module.
Compared with the prior art, the invention has the beneficial effects that the adhesive clamping of the plywood at the outer side of the insulating module is realized by means of the MARK3 liquid dome material hole plug manufacturing auxiliary device, the firm installation of the plywood at the outer part of the insulating module is ensured, and the quality of the final plug finished product is improved to meet the requirement of material hole sealing.
Drawings
FIG. 1 is a schematic structural diagram of an auxiliary device for manufacturing a liquid dome material hole plug of MARK3 in the invention.
Fig. 2 is a schematic view of the spider leg structure in the present invention.
Fig. 3 is a schematic view of an adjustment aperture in the present invention.
FIG. 4 is a schematic flow chart of the process for making a MARK3 liquid dome orifice plug of the present invention.
In the figure, 1, spider leg; 2. a rectangular frame body; 3. a steel plate; 4. a column; 5. an insulating module; 6. a limiting block; 7. a gasket; 8. plywood; 9. protecting edges at right angles; 101. adjusting the screw rod; 102. a support leg; 103. mounting blocks; 104. a spherical shaft; 105. a handle; 106. a hexagonal nut; 201. a first frame; 202 a second border; 203. a third frame; 204. a fourth frame; 205. an adjustment hole; 206. connecting holes; 207. a connecting member.
Detailed Description
The technical solution of the present invention is further described below with reference to specific embodiments:
an auxiliary device for manufacturing a MARK3 liquid dome material hole plug is structurally characterized by comprising a rectangular frame body 2 and a plurality of spider legs 1 symmetrically distributed along four sides of the rectangular frame body, wherein each spider leg 1 comprises an adjusting screw 101 and a supporting leg 102, the supporting leg 102 is installed at one end of the adjusting screw 101, the adjusting screw 101 is perpendicular to one side of the rectangular frame body, and the adjusting screw 101 is parallel to the surface formed by the four sides of the rectangular frame body; the support legs 102 are located within the rectangular frame; the adjusting screw 101 is installed in threaded fit with the rectangular frame body.
In this embodiment, the mounting block 103 is welded to the rectangular frame, the mounting block 103 is provided with an internal threaded hole that penetrates through the mounting block, the adjusting screw 101 penetrates through the internal threaded hole, and the adjusting screw is in threaded engagement with the internal threaded hole.
The support foot 102 can be fixed at the end of the adjusting screw 101, or the support foot 102 can be movably mounted at the end of the adjusting screw 101 through a spherical shaft 104, and the angle adjustment of the support foot 102 can be realized through the spherical shaft 104.
The other end of the adjusting screw 101 is also provided with a handle 105 for rotating the adjusting screw 101, the handle 105 is a butterfly handle, and the adjusting screw 101 is rotated through the butterfly handle, so that the support legs 102 abut against the plywood, and the plywood is bonded on the side surface of the insulating module. A hexagonal nut 106 for rotating the adjusting screw 101 is further fixed on the adjusting screw 101, and a wrench can be used to clamp the hexagonal nut and rotate the adjusting screw so that the support legs further clamp the plywood.
The rectangular frame body 2 comprises a first frame 201, a second frame 202, a third frame 203 and a fourth frame 204, wherein the first frame 201 and the second frame 202 are arranged in parallel, and the third frame 203 and the fourth frame 204 are arranged in parallel; two ends of the first frame 201 and two ends of the second frame 202 are respectively provided with an adjusting hole 205 for adjusting the distance between the third frame 203 and the fourth frame 204, and two ends of the third frame 203 and the fourth frame 204 are respectively provided with a connecting hole 206 which is matched with the adjusting hole 205 and penetrates through the connecting piece 207; the connecting member 207 is inserted into the connecting hole 206, the connecting member 207 is a bolt, the connecting hole 206 is a circular hole, the adjusting hole 205 is a strip-shaped hole (as shown in fig. 1) or a toothed hole (as shown in fig. 3), and the distance between the third frame 203 and the fourth frame 204 is adjusted by changing the position of the connecting member 207 in the adjusting hole 205. The connecting hole 206 may also be an adjusting hole, such as a strip-shaped hole or a toothed hole, which can adjust the distance between the first frame 201 and the second frame 202.
The embodiment also provides a method for manufacturing the hole plug of the liquid dome of the MARK3, which comprises the following steps, as shown in FIG. 4:
s1, welding a plurality of upright posts 4 for installing insulation modules on the square steel plate 3, wherein the insulation modules 5 are of cuboid structures, and a plurality of openings penetrating through two sides of the insulation modules are formed in the insulation modules 5; the upper end of the upright post 4 is provided with an external thread, the external thread is screwed with a limiting block 6 provided with an internal thread, and the limiting block 6 is a nut;
s2, hoisting the insulation module 5, wherein the insulation module 5 consists of a polyurethane block and a plywood, and the plywood is bonded outside the polyurethane block; when the insulation modules 5 are installed, the limiting blocks 6 are taken down, so that the holes of the insulation modules are sleeved on the corresponding stand columns 4, the upper ends of the stand columns 4 penetrate out of the insulation modules 5, the upper ends of the stand columns 4 are sleeved with gaskets 7, then the limiting blocks 6 are installed, and the limiting blocks 6 are rotated so that the limiting blocks 6 clamp the upper ends of the insulation modules 5;
s3, coating adhesives on four side faces of the insulating module 5, wherein the adhesives are TBP (tunnel boring machine) glue (polyurethane resin), and installing the plywood 8 to enable the plywood 8 to be adhered to the side faces of the insulating module 5;
s4, arranging the rectangular frame body 2 on the outer side of the insulating module 5, enabling the plywood 8 on the four sides to be located in the rectangular frame body 2, and rotating the adjusting screw 101 to enable the support legs 102 to abut against the plywood 8;
s5, after 24 hours, after the adhesive is cured, reversely rotating the adjusting screw rod, and removing the rectangular frame body 2;
s6, mounting a right-angle protective edge 9 at the splicing corner of the plywood on the side face of the insulating module, reserving a space between the right-angle protective edge 9 and the steel plate 3 at the bottom, selecting angle iron as the right-angle protective edge 9, and mounting the right-angle protective edge on the plywood 8 through a screw to complete the manufacture of the MARK3 liquid dome material hole plug.
The present invention is further explained and not limited by the embodiments, and those skilled in the art can make various modifications as necessary after reading the present specification, but all the embodiments are protected by the patent law within the scope of the claims.

Claims (10)

1. The MARK3 liquid dome material hole plug manufacturing auxiliary device is characterized by comprising a rectangular frame body and a plurality of spider legs symmetrically distributed along four sides of the rectangular frame body, wherein each spider leg comprises an adjusting screw rod and a supporting leg, the supporting leg is installed at one end of the adjusting screw rod, the adjusting screw rod is perpendicular to one side of the rectangular frame body, and the adjusting screw rods are parallel to the surfaces formed by the four sides of the rectangular frame body; the support legs are positioned in the rectangular frame; and the adjusting screw rod is in threaded fit with the rectangular frame body.
2. The MARK3 liquid dome hole plug manufacturing aid of claim 1, wherein the leg is movably connected with the end of the adjusting screw through a spherical shaft.
3. The MARK3 liquid dome hole plug manufacturing aid of claim 1, wherein the other end of the adjusting screw is further provided with a handle for rotating the adjusting screw.
4. The MARK3 liquid dome hole plug manufacturing aid of claim 1, wherein a hexagonal nut for rotating the adjusting screw is further fixed on the adjusting screw.
5. The MARK3 liquid dome material hole plug manufacturing auxiliary device of any one of claims 1-4, wherein the rectangular frame body comprises a first frame, a second frame, a third frame and a fourth frame, the first frame and the second frame are arranged in parallel, and the third frame and the fourth frame are arranged in parallel; adjusting holes for adjusting the space between the third frame and the fourth frame are formed in the two ends of the first frame and the two ends of the second frame, and connecting holes matched with the adjusting holes and penetrating through the connecting pieces are formed in the two ends of the third frame and the fourth frame respectively; the connecting piece is penetrated in the connecting hole, and the distance between the third frame and the fourth frame is adjusted at the position of the adjusting hole by the connecting piece.
6. The MARK3 liquid dome hole plug manufacturing aid of claim 5, wherein the connection hole is also an adjustment hole.
7. The MARK3 liquid dome hole plug manufacturing aid of claim 5, wherein the adjustment hole is a toothed hole.
8. The MARK3 liquid dome hole plug manufacturing auxiliary device of claim 5, wherein the adjusting hole is a strip-shaped hole.
9. A method for manufacturing a hole plug of a liquid dome of MARK3, which is characterized by comprising the following steps:
s1, welding a plurality of upright posts for installing an insulation module on the square steel plate, wherein the insulation module is provided with a plurality of openings penetrating through two sides of the insulation module; the upper end of the upright post is provided with an external thread, and the external thread is screwed with a limiting block provided with an internal thread;
s2, hoisting the insulation modules, enabling the holes of the insulation modules to be sleeved on the corresponding upright posts, enabling the upper ends of the upright posts to penetrate out of the insulation modules, and rotating the limiting blocks to enable the limiting blocks to clamp the upper ends of the insulation modules;
s3, brushing adhesives on four side faces of the insulating module, and mounting a plywood to enable the plywood to be adhered to the side faces of the insulating module;
s4, arranging the rectangular frame body in the claim 1 or 6 at the outer side of the insulating module, enabling the plywood at the four sides to be positioned in the rectangular frame body, and rotating the adjusting screw rod to enable the support legs to abut against the plywood;
s5, after the adhesive is cured, reversely rotating the adjusting screw rod, and removing the rectangular frame body;
and S6, mounting a right-angle protective edge at the splicing corner of the plywood on the side surface of the insulating module.
10. A MARK3 liquid dome orifice plug, made according to the method of claim 9.
CN202111389068.XA 2021-11-22 Auxiliary device and method for manufacturing MARK3 liquid dome material hole plug and plug Active CN114147977B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111389068.XA CN114147977B (en) 2021-11-22 Auxiliary device and method for manufacturing MARK3 liquid dome material hole plug and plug

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111389068.XA CN114147977B (en) 2021-11-22 Auxiliary device and method for manufacturing MARK3 liquid dome material hole plug and plug

Publications (2)

Publication Number Publication Date
CN114147977A true CN114147977A (en) 2022-03-08
CN114147977B CN114147977B (en) 2024-05-10

Family

ID=

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115351503A (en) * 2022-07-29 2022-11-18 沪东中华造船(集团)有限公司 Installation method for insulating module in corner area of thin film tank
CN115783174A (en) * 2022-09-22 2023-03-14 沪东中华造船(集团)有限公司 Method for accurately installing liquid dome bracket in liquid cargo tank of N0.96 containment system

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH551581A (en) * 1972-08-01 1974-07-15 Kneuss Rene CLOSING DEVICE FOR CONTAINERS, ESPECIALLY FOR VEHICLE TANKS.
US4478022A (en) * 1982-05-18 1984-10-23 Ksm Fastening Systems Inc. Insulation system and method and apparatus for retaining same
CN210739713U (en) * 2019-08-23 2020-06-12 上海建工七建集团有限公司 Temporary pipeline plugging device
CN211778346U (en) * 2019-11-08 2020-10-27 沪东中华造船(集团)有限公司 Insulating module fixed mounting anchor clamps
CN211992750U (en) * 2020-03-31 2020-11-24 河北南玻玻璃有限公司 Puller auxiliary device
CN213081842U (en) * 2020-06-30 2021-04-30 中国二十二冶集团有限公司 Flatness control device for embedded wire box of prefabricated wall
CN213401341U (en) * 2020-10-29 2021-06-08 南京林业大学 Lithium battery cover plate

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH551581A (en) * 1972-08-01 1974-07-15 Kneuss Rene CLOSING DEVICE FOR CONTAINERS, ESPECIALLY FOR VEHICLE TANKS.
US4478022A (en) * 1982-05-18 1984-10-23 Ksm Fastening Systems Inc. Insulation system and method and apparatus for retaining same
CN210739713U (en) * 2019-08-23 2020-06-12 上海建工七建集团有限公司 Temporary pipeline plugging device
CN211778346U (en) * 2019-11-08 2020-10-27 沪东中华造船(集团)有限公司 Insulating module fixed mounting anchor clamps
CN211992750U (en) * 2020-03-31 2020-11-24 河北南玻玻璃有限公司 Puller auxiliary device
CN213081842U (en) * 2020-06-30 2021-04-30 中国二十二冶集团有限公司 Flatness control device for embedded wire box of prefabricated wall
CN213401341U (en) * 2020-10-29 2021-06-08 南京林业大学 Lithium battery cover plate

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115351503A (en) * 2022-07-29 2022-11-18 沪东中华造船(集团)有限公司 Installation method for insulating module in corner area of thin film tank
CN115351503B (en) * 2022-07-29 2024-03-26 沪东中华造船(集团)有限公司 Method for installing insulation module in corner area of thin film tank
CN115783174A (en) * 2022-09-22 2023-03-14 沪东中华造船(集团)有限公司 Method for accurately installing liquid dome bracket in liquid cargo tank of N0.96 containment system

Similar Documents

Publication Publication Date Title
CN104476223B (en) Following adaptive supporting mechanism for thin-wall cover hood like parts
CN114147977A (en) Mark3 liquid dome material hole plug manufacturing auxiliary device, manufacturing method and plug
CN114147977B (en) Auxiliary device and method for manufacturing MARK3 liquid dome material hole plug and plug
CN211220259U (en) A frock clamp for powder metallurgy grinding machine
CN113670683A (en) Glue filling clamp and glue filling method for reinforced wallboard compression test piece
JP5907447B1 (en) Steel column base
JPH05339992A (en) Structure of column base for square steel pipe column
CN203245469U (en) Groove cutting tooling for fillister hexagon head bolt
CN211201181U (en) Fixing assembly for building template
CN207858355U (en) A kind of big end cap clamping tool of automobile
JP2000183389A (en) Solar cell device
CN219411303U (en) Combined spliced steel structure
CN110729949A (en) Device convenient for mounting solar panel roof and using method thereof
CN202639707U (en) Welding fixture for assembly of C-shaped beam
JP2010216196A (en) Anchor bolt installation method for continuous footing, and anchor bolt-tool set
CN219100321U (en) Detachable building structure
CN215092072U (en) Special-shaped oil pipe joint end face sealing groove turning clamp
CN216606721U (en) Sheet flatness correction tool
CN215980319U (en) MIC board cotton subsides that takes precautions against earthquakes installs mechanism and system
CN220058341U (en) Positioning structure for embedded part connected with high-precision shock insulation support
CN203520003U (en) Projector fixing rack
CN217460887U (en) Secondary structure anti-seepage and anti-leakage device
CN210724638U (en) Device convenient to solar panel roof installation
CN211714307U (en) V-arrangement unit curtain connection structure
CN212420202U (en) Positioning device

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant