CN110912011B - Transformer substation large-scale equipment base and chain block connector - Google Patents
Transformer substation large-scale equipment base and chain block connector Download PDFInfo
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- CN110912011B CN110912011B CN201911051276.1A CN201911051276A CN110912011B CN 110912011 B CN110912011 B CN 110912011B CN 201911051276 A CN201911051276 A CN 201911051276A CN 110912011 B CN110912011 B CN 110912011B
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- 238000000034 method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B3/00—Apparatus specially adapted for the manufacture, assembly, or maintenance of boards or switchgear
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Abstract
The invention discloses a connector for a substation large-scale equipment base and a chain block, which comprises a first transverse plate and a second transverse plate, wherein the lower ends of the first transverse plate and the second transverse plate are fixedly connected with a fixed seat, and a supporting device for supporting the first transverse plate and the second transverse plate is arranged on the fixed seat. According to the invention, the first double-head threaded rod, the first connecting plates, the second connecting plates, the vertical rods, the gears and the racks are arranged, the distance between the two first connecting plates and the two second connecting plates can be adjusted by rotating the first double-head threaded rod, and the distance between the first transverse plate and the second transverse plate can be adjusted by rotating the vertical rods, so that the connector can be adjusted according to the sizes of different equipment bases.
Description
Technical Field
The invention relates to the technical field of transformer substations, in particular to a connector for a transformer substation large-scale equipment base and a chain block.
Background
The transformer substation is a place for converting voltage and current, receiving electric energy and distributing electric energy in an electric power system, large-scale equipment needs to be moved in the process of carrying out electrical construction on the transformer substation, and the large-scale equipment is often fixed with an equipment base through a chain block to move the equipment base.
At present, the hand chain block moves the equipment base through the connector, but for the equipment bases with different sizes, because the size of the existing connector is fixed, the connectors with different types and sizes are required to be selected to move the equipment base, so that various connectors are required to be carried, the workload is large, the time is wasted in the selection process, and the working efficiency is influenced, in addition, the existing connector directly contacts with the ground after clamping the equipment base, when the equipment base is moved, the equipment base is in friction movement with the ground, the equipment base is required to be pulled by the great force of the hand chain block, the movement of the equipment base is very difficult, and when the hand chain block is connected with the hook on the connector, the connection between the hand chain block and the hook is very loose, so that the hand chain block is very easy to fall off from the hook, safety accidents are caused in the process of moving the equipment base.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides a connector for a base of large equipment of a transformer substation and a chain block, which can adjust the distance between two first connecting plates and two second connecting plates by arranging a first double-threaded rod, a first connecting plate, a second connecting plate, a vertical rod, a gear and a rack, wherein the distance between the two first connecting plates and the two second connecting plates can be adjusted by rotating the first double-threaded rod, the distance between a first transverse plate and a second transverse plate can be adjusted by rotating the vertical rod, so that the connector can be adjusted according to the sizes of different equipment bases, the operation is simple, the applicability is strong, the motor rotates the second double-threaded rod by arranging the motor, the second double-threaded rod, the nut, the first connecting rod, the second connecting rod and the roller, the roller moves downwards under the action of the first connecting rod and the second connecting rod, the roller is contacted with the ground, and the equipment bases can be conveniently moved, increase work efficiency, through setting up threaded rod and arc splint, rotate the threaded rod and make arc splint press from both sides tightly chain block, avoid coming off with the pull ring at the in-process chain block that removes equipment base, lead to the emergence of incident.
In order to achieve the purpose, the invention adopts the following technical scheme:
a base and chain block connector for substation large equipment comprises a first transverse plate and a second transverse plate, wherein two first grooves along the vertical direction are respectively formed in opposite side walls of the first transverse plate and the second transverse plate, the inner walls of the two first grooves are rotatably connected with a first double-thread rod, the side wall of the first double-thread rod on the first transverse plate is symmetrically and threadedly connected with a first sliding block, the side wall of the first double-thread rod on the second transverse plate is symmetrically and threadedly connected with a second sliding block, the side wall of the first sliding block is fixedly connected with a first connecting plate, the side wall of the second sliding block is fixedly connected with a second connecting plate, adjusting devices for adjusting the distance between the first transverse plate and the second transverse plate are mounted on the first connecting plate and the second connecting plate, fixing seats are fixedly connected at the lower ends of the first transverse plate and the second transverse plate, and one side wall of each fixing seat is flush with one side wall of the first transverse plate and one side, the fixing seat is provided with a supporting device for supporting the first transverse plate and the second transverse plate, the side wall of the fixing seat is fixedly connected with a pull ring through an iron chain, and the pull ring is provided with a clamping device for clamping the chain block.
Preferably, adjusting device includes the slide bar of symmetry fixed connection at first connecting plate relative lateral wall, the second recess has been seted up to second connecting plate lateral wall, just second recess and second connecting plate one side lateral wall intercommunication, the relative inner wall of second recess seted up with slide bar complex first spout, one side lateral wall fixedly connected with rack that first connecting plate is close to the second recess, second recess inner wall rotates and is connected with the montant, montant lateral wall fixedly connected with rack toothing's gear.
Preferably, the montant upper end runs through second connecting plate upper end and fixedly connected with hand wheel, threaded connection has the bolt on the hand wheel, the bolt runs through the hand wheel lateral wall, the second connecting plate lateral wall is seted up a plurality of and bolt complex screw holes along montant axle center circumference equidistant.
Preferably, the supporting device comprises a roller, a third groove is symmetrically formed in the lower end of the fixing seat, the roller is arranged in the third groove, a second chute is formed in the inner wall, opposite to the third groove, of the third groove, the inner wall of the second chute is fixedly connected with the side wall of the roller through a connecting block, a fourth groove is symmetrically formed in the side wall of the fixing seat, and a driving device for driving the roller to slide in the third groove is installed in the fourth groove.
Preferably, drive arrangement rotates the second double-thread pole of connection at fourth recess inner wall, second double-thread pole lateral wall symmetry threaded connection has the nut, gyro wheel upper end fixedly connected with head rod, the fixing base lateral wall is run through and the fourth recess is extended to in the head rod upper end, the nut lateral wall passes through the second connecting rod and is connected with the head rod upper end rotation.
Preferably, clamping device includes the threaded rod of symmetry threaded connection at the relative lateral wall of pull ring, the one end rotation that the pull ring inner wall was kept away from to the threaded rod is connected with arc splint, pull ring lateral wall and fixedly connected with are run through to the threaded rod upper end and are twisted the cap.
Preferably, the fixing base side wall is fixedly connected with a motor, and the movable end of the motor penetrates through the fixing base side wall and is fixedly connected with one end of the second double-end threaded rod.
Preferably, first diaphragm, second diaphragm, first connecting plate and the equal fixedly connected with of second connecting plate lateral wall a plurality of antiskid are protruding, first diaphragm and second diaphragm lateral wall and fixedly connected with hand wheel are run through to first double-end screw rod upper end.
The invention has the following beneficial effects:
1. by arranging the first transverse plate, the second transverse plate, the first double-threaded rod, the first connecting plates, the second connecting plates, the vertical rods, the gears and the racks, the distance between the two first connecting plates and the two second connecting plates can be adjusted by rotating the first double-threaded rod, the gears are rotated by rotating the vertical rods, the gears drive the racks to move, the first connecting plates slide in the first grooves, the distance between the first transverse plate and the second transverse plate is adjusted, and the connector can be adjusted according to the sizes of different equipment bases;
2. by arranging the motor, the second double-threaded rod, the nuts, the first connecting rod, the second connecting rod and the idler wheels, after the base body is clamped by the first transverse plate and the second transverse plate, the second double-threaded rod is rotated through the motor, so that the two nuts move relatively on the second double-threaded rod, the first connecting rod pushes the second connecting rod to move downwards, the idler wheels are further pushed to be separated from the third grooves, the idler wheels are enabled to be in contact with the ground, the equipment base is convenient to move, and the working efficiency is improved;
3. through setting up the threaded rod of symmetry threaded connection at the pull ring inner wall, rotate the threaded rod and make the arc splint of being connected rotate with the threaded rod press from both sides tightly chain block, avoid carrying out the in-process that removes equipment base, chain block and pull ring drop, lead to the emergence of incident.
Drawings
Fig. 1 is a schematic structural diagram of a base of a large-scale device of a transformer substation and a chain block connector provided by the invention;
fig. 2 is a schematic sectional structure view in the direction of a-a of a base of a large-scale device of a transformer substation and a chain block connector according to the present invention;
FIG. 3 is an enlarged view of the structure at B in FIG. 2;
FIG. 4 is an enlarged view of the structure at C in FIG. 2;
FIG. 5 is an enlarged view of the structure at D in FIG. 1;
FIG. 6 is a schematic view of an E-direction cross-sectional structure of a base of a large-scale device of a transformer substation and a chain block connector provided in the present invention
In the figure: 1 first diaphragm, 2 second diaphragm, 3 first recess, 4 first double-threaded rod, 5 first slider, 6 second sliders, 7 second connecting plates, 8 first connecting plates, 9 anti-skidding archs, 10 second recesses, 11 racks, 12 montants, 13 gears, 14 fixing bases, 15 fourth recesses, 16 second double-threaded rod, 17 nuts, 18 motors, 19 iron chains, 20 pull rings, 21 first chutes, 22 slide bars, 23 threaded holes, 24 bolts, 25 rollers, 26 third recesses, 27 second chutes, 28 connecting blocks, 29 first connecting rods, 30 second connecting rods, 31 arc-shaped clamping plates, 32 threaded rods.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but rather should be construed as broadly as the present invention is capable of modification in various respects, all without departing from the spirit and scope of the present invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1-6, a transformer substation large-scale equipment base and chain block connector comprises a first transverse plate 1 and a second transverse plate 2, wherein two first grooves 3 along the vertical direction are respectively formed on opposite side walls of the first transverse plate 1 and the second transverse plate 2, the inner walls of the two first grooves 3 are rotatably connected with a first double-threaded rod 4, the side wall of the first double-threaded rod 4 on the first transverse plate 1 is symmetrically and threadedly connected with a first slider 5, the side wall of the first double-threaded rod 4 on the second transverse plate 2 is symmetrically and threadedly connected with a second slider 6, the side wall of the first slider 5 is fixedly connected with a first connecting plate 8, the side wall of the second slider 6 is fixedly connected with a second connecting plate 7, and the side walls of the first transverse plate 1, the second transverse plate 2, the first connecting plate 8 and the second connecting plate 7 are fixedly connected with a plurality of anti-skid protrusions 9, so that the friction force when the, make the clamp to the equipment base tight more stable, first double-end screw 4 upper end runs through first diaphragm 1 and 2 lateral walls of second diaphragm and fixedly connected with hand wheel, the cover is equipped with the rubber antiskid cover on the hand wheel, install the adjusting device who adjusts distance between first diaphragm 1 and the second diaphragm 2 on first connecting plate 8 and the second connecting plate 7, the equal fixedly connected with fixing base 14 of first diaphragm 1 and 2 lower extremes of second diaphragm, and 14 one side lateral wall of fixing base flushes as shown in figure 6 with first diaphragm 1 and 2 one side lateral wall of second diaphragm, install the strutting arrangement who supports first diaphragm 1 and second diaphragm 2 on the fixing base 14, 14 lateral walls of fixing base pass through 19 fixedly connected with pull ring 20 of iron chain, install the adversary's clamping device that the pulling block pressed from both sides tightly on the pull ring 20.
The adjusting device comprises slide bars 22 which are symmetrically and fixedly connected with opposite side walls of the first connecting plate 8, a second groove 10 is formed in the side wall of the second connecting plate 7, and the second groove 10 is communicated with one side wall of the second connecting plate 7, so that the first connecting plate 8 can freely enter and exit the second groove 10. The first spout 21 of cooperating with slide bar 22 is seted up to the relative inner wall of second recess 10, one side lateral wall fixedly connected with rack 11 that first connecting plate 8 is close to second recess 10, second recess 10 inner wall rotates and is connected with montant 12, montant 12 lateral wall fixedly connected with rack 11 meshed gear 13, montant 12 upper end runs through second connecting plate 7 upper end and fixedly connected with hand wheel, threaded connection has bolt 24 on the hand wheel, bolt 24 runs through the hand wheel lateral wall, second connecting plate 7 lateral wall is seted up a plurality of and bolt 24 complex screw holes 23 along montant 12 axle center circumference equidistant, can fix the position of first connecting plate 8 in second recess 10, and then fix the distance between first diaphragm 1 and the second diaphragm 2.
The supporting device comprises a roller 25, a third groove 26 is symmetrically formed in the lower end of the fixing seat 14, the roller 25 is arranged in the third groove 26, a second sliding groove 27 is formed in the inner wall of the third groove 26 relatively, the inner wall of the second sliding groove 27 is fixedly connected with the side wall of the roller 25 through a connecting block 28, the roller 25 is always kept in the vertical direction when moving downwards, a fourth groove 15 is symmetrically formed in the side wall of the fixing seat 14, and a driving device for driving the roller 25 to slide in the third groove 26 is installed in the fourth groove 15.
Drive arrangement rotates second double threaded rod 16 of connection at the 15 inner walls of fourth recess, 16 lateral walls symmetry threaded connection of second double threaded rod has nut 17, gyro wheel 25 upper end fixedly connected with head rod 29, head rod 29 upper end runs through fixing base 14 lateral wall and extends to in the fourth recess 15, nut 17 lateral wall passes through second connecting rod 30 and is connected with head rod 29 upper end rotation, fixing base 14 lateral wall fixedly connected with motor 18, motor 18 expansion end run through fixing base 14 lateral wall and with 16 one end fixed connection of second double threaded rod.
The clamping device comprises a threaded rod 32 symmetrically connected to the opposite side wall of the pull ring 20 in a threaded manner, an arc-shaped clamping plate 31 is rotatably connected to one end, far away from the inner wall of the pull ring 20, of the threaded rod 32, and the upper end of the threaded rod 32 penetrates through the side wall of the pull ring 20 and is fixedly connected with a screwing cap.
In the invention, a first transverse plate 1 and a second transverse plate 2 are placed on opposite side walls of an equipment base, the first connecting plate 8 is pushed into a second groove 10, a sliding rod 22 is matched with a first sliding groove 21, after the first connecting plate 8 is pushed into the second groove 10, a rack 11 can push a gear 13 to rotate until the gear 13 is meshed with the gear 13, then a vertical rod 12 is rotated, the gear 13 drives the rack 11 to move, the first connecting plate 8 slides in the second groove 10, the gear 13 is rotated according to the length of the side wall of the equipment base, the first transverse plate 1 and the second transverse plate 2 clamp the opposite side walls of the equipment base, then a bolt 24 on an upper end hand wheel of the vertical rod 12 is matched with a threaded hole 23, the position of the first connecting plate 8 in the second groove 10 is fixed, then a first double-head threaded rod 4 is rotated, so that a first sliding block 5 and a second sliding block 6 which are respectively positioned on the first transverse plate 1 and the second transverse plate 2, the first connecting plate 8 and the second connecting plate 7 are driven to move, and the equipment base is comprehensively clamped;
after pressing from both sides tight the equipment base, starter motor 18, motor 18 rotates and makes its expansion end fixed connection's second double threaded rod 16 rotate, make nut 17 relative movement on the second double threaded rod 16, promote gyro wheel 25 and remove to the direction of keeping away from the top in the third recess 26 under the effect of head rod 29 and second connecting rod 30, make gyro wheel 25 and ground contact, support the equipment base, make the equipment base remove under the effect of gyro wheel 25, then put into pull ring 20 with chain block one end, rotation threaded rod 32, make threaded rod 32 keep away from 20 inner wall one ends of pull ring and rotate the arc splint 31 of connecting and press from both sides tight chain block one end, just can remove the equipment base.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (6)
1. The utility model provides a substation large-scale equipment base and chain block connector, includes first diaphragm (1) and second diaphragm (2), its characterized in that, two first recess (3) along vertical direction are all seted up to first diaphragm (1) and second diaphragm (2) relative lateral wall, two first recess (3) inner wall rotates and is connected with first double-threaded rod (4), is located first double-threaded rod (4) lateral wall symmetry threaded connection on first diaphragm (1) has first slider (5), is located first double-threaded rod (4) lateral wall symmetry threaded connection on second diaphragm (2) has second slider (6), first slider (5) lateral wall fixedly connected with first connecting plate (8), second slider (6) lateral wall fixedly connected with second connecting plate (7), install on first connecting plate (8) and second connecting plate (7) and adjust between first diaphragm (1) and the second diaphragm (2) apart from distance The adjusting device comprises sliding rods (22) which are symmetrically and fixedly connected to opposite side walls of a first connecting plate (8), a second groove (10) is formed in the side wall of the second connecting plate (7), the second groove (10) is communicated with the side wall of one side of the second connecting plate (7), a first sliding groove (21) matched with the sliding rods (22) is formed in the opposite inner wall of the second groove (10), a rack (11) is fixedly connected to the side wall of one side, close to the second groove (10), of the first connecting plate (8), a vertical rod (12) is rotatably connected to the inner wall of the second groove (10), and a gear (13) meshed with the rack (11) is fixedly connected to the side wall of the vertical rod (12);
the lower ends of the first transverse plate (1) and the second transverse plate (2) are fixedly connected with a fixed seat (14), and the side wall of one side of the fixed seat (14) is flush with the side walls of one sides of the first transverse plate (1) and the second transverse plate (2), a supporting device for supporting the first transverse plate (1) and the second transverse plate (2) is arranged on the fixed seat (14), the supporting device comprises a roller (25), the lower end of the fixed seat (14) is symmetrically provided with third grooves (26), the roller (25) is arranged in a third groove (26), a second sliding groove (27) is arranged on the inner wall of the third groove (26), the inner wall of the second sliding chute (27) is fixedly connected with the side wall of the roller (25) through a connecting block (28), fourth grooves (15) are symmetrically formed in the side wall of the fixed seat (14), and driving devices for driving the rollers (25) to slide in the third grooves (26) are mounted in the fourth grooves (15); the side wall of the fixed seat (14) is fixedly connected with a pull ring (20) through an iron chain (19), and a clamping device for clamping the chain block is installed on the pull ring (20).
2. The transformer substation large-scale equipment base and chain block connector as claimed in claim 1, wherein the upper end of the vertical rod (12) penetrates through the upper end of the second connecting plate (7) and is fixedly connected with a hand wheel, the hand wheel is in threaded connection with a bolt (24), the bolt (24) penetrates through the side wall of the hand wheel, and a plurality of threaded holes (23) matched with the bolt (24) are formed in the side wall of the second connecting plate (7) at equal intervals along the axial center circumference of the vertical rod (12).
3. The substation large-scale equipment base and chain block connector as claimed in claim 1, wherein the driving device is connected to the second double-threaded rod (16) on the inner wall of the fourth groove (15) in a rotating manner, the second double-threaded rod (16) is connected with the nut (17) through the symmetrical threads on the side wall, the upper end of the roller (25) is fixedly connected with the first connecting rod (29), the upper end of the first connecting rod (29) penetrates through the side wall of the fixing base (14) and extends into the fourth groove (15), and the side wall of the nut (17) is connected with the upper end of the first connecting rod (29) through the second connecting rod (30) in a rotating manner.
4. The substation large-scale equipment base and chain block connector as claimed in claim 1, wherein the clamping device comprises a threaded rod (32) symmetrically screwed on the opposite side walls of the pull ring (20), one end of the threaded rod (32) far away from the inner wall of the pull ring (20) is rotatably connected with an arc-shaped clamping plate (31), and the upper end of the threaded rod (32) penetrates through the side walls of the pull ring (20) and is fixedly connected with a screwing cap.
5. The transformer substation large-scale equipment base and chain block connector as claimed in claim 3, wherein a motor (18) is fixedly connected to the side wall of the fixed seat (14), and the movable end of the motor (18) penetrates through the side wall of the fixed seat (14) and is fixedly connected with one end of the second double-threaded rod (16).
6. The transformer substation large-scale equipment base and chain block connector as claimed in claim 1, wherein the side walls of the first transverse plate (1), the second transverse plate (2), the first connecting plate (8) and the second connecting plate (7) are fixedly connected with a plurality of anti-skid protrusions (9), and the upper end of the first double-end threaded rod (4) penetrates through the side walls of the first transverse plate (1) and the second transverse plate (2) and is fixedly connected with a hand wheel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911051276.1A CN110912011B (en) | 2019-10-31 | 2019-10-31 | Transformer substation large-scale equipment base and chain block connector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911051276.1A CN110912011B (en) | 2019-10-31 | 2019-10-31 | Transformer substation large-scale equipment base and chain block connector |
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| Publication Number | Publication Date |
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| CN110912011A CN110912011A (en) | 2020-03-24 |
| CN110912011B true CN110912011B (en) | 2021-05-07 |
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| CN201911051276.1A Active CN110912011B (en) | 2019-10-31 | 2019-10-31 | Transformer substation large-scale equipment base and chain block connector |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111900657B (en) * | 2020-08-10 | 2022-04-15 | 扬州德云电气设备集团有限公司 | Low-voltage distribution cabinet body assembly correcting device |
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| JPH07277674A (en) * | 1994-04-11 | 1995-10-24 | Sumitomo Heavy Ind Ltd | Cable drum carrier type feeder device |
| JP3256509B2 (en) * | 1999-01-07 | 2002-02-12 | 関西電力株式会社 | Pipe loading method and pipe loading device |
| JP2004168541A (en) * | 2002-11-22 | 2004-06-17 | Mitsubishi Electric Corp | Assembling and storing apparatus for distribution panel or control panel and assembling and storing method of distribution panel or control panel |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103441437A (en) * | 2013-09-09 | 2013-12-11 | 山东送变电工程公司 | Connector for connecting transformer station large-size apparatus base and chain block |
| CN207276110U (en) * | 2017-08-22 | 2018-04-27 | 毕殿成 | A kind of portable lifting machine easy to petroleum pipeline installation |
| CN207533138U (en) * | 2017-11-27 | 2018-06-26 | 湖北虹宇精细化工股份有限公司 | A kind of chemistry painting industry mixing plant |
| CN208898370U (en) * | 2018-08-30 | 2019-05-24 | 山东住工装配建筑有限公司 | Prefabricated components hang to carry and set |
| CN110238789A (en) * | 2019-06-22 | 2019-09-17 | 朱姗姗 | A kind of medical stretcher packaging technology assembling pedestal |
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