CN215886026U - Mechanical horizontal cylinder lifting sling - Google Patents
Mechanical horizontal cylinder lifting sling Download PDFInfo
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- CN215886026U CN215886026U CN202122376462.1U CN202122376462U CN215886026U CN 215886026 U CN215886026 U CN 215886026U CN 202122376462 U CN202122376462 U CN 202122376462U CN 215886026 U CN215886026 U CN 215886026U
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- sliding guide
- guide rail
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- weight
- lifting
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Abstract
The utility model relates to a mechanical horizontal cylinder lifting sling, which comprises two U-shaped plate lifting hooks, a sliding guide rail and two lever type dead weight opening and closing structures, wherein each lever type dead weight opening and closing structure is a mechanical structure and comprises a front end contact rod, a transmission lever and a locking bolt, when the front part of a dead weight unlocking is in a dead weight state, the rear part of the dead weight unlocking moves upwards to push the locking bolt to upwards insert into a bolt hole, when the bottom of the front end contact rod at the front part of the dead weight unlocking contacts the upper surface of a hung cylinder, the cylinder body reaction force pushes the front end contact rod to upwards move, the rear part of the dead weight unlocking moves downwards to the locking bolt to be separated from the bolt hole, the automatic alignment of the bolt and the pin pulling can be realized, the automatic clamping and the falling of the hung cylinders made of different materials are realized, no external force is needed for driving, the energy consumption is greatly reduced, meanwhile, the mechanical horizontal cylinder lifting sling can be suitable for operation in a high temperature environment, and no person is needed to climb when the hook is unhooked, greatly improving the working efficiency, reducing the labor intensity of workers, avoiding the risk of personnel contacting high temperature and having strong practicability.
Description
Technical Field
The utility model relates to the field of hoisting structures, in particular to a mechanical horizontal cylinder hoisting sling.
Background
In industrial production and manufacturing, a large number of horizontal cylinders need to be hoisted and transported, the traditional hook-type lifting is required to ascend to the top of the cylinder, high operation safety risk exists, the working efficiency is low, the internally-penetrating lifting beam is required to repeatedly penetrate, disassemble and assemble a shackle during lifting, and the working efficiency is not high; the electric telescopic type lifting appliance has high working efficiency, but needs to be connected with electricity for a plurality of workshops, does not have the condition and is expensive.
The conventional patent CN 202020758605.8 provides a special lifting appliance for cylindrical universal parts, relates to the technical field of part manufacturing, and aims to solve the problems that the conventional cylindrical parts need to be moved by a lifting appliance in the production and processing process, and a general lifting appliance cannot well fix the cylindrical parts in the lifting process, so that the fixing effect of the lifting appliance needs to be enhanced. A sliding guide rail is arranged above the cylindrical part lifting appliance body, a connecting slide block is arranged on the lower surface of the sliding guide rail, the lower surface of the connecting slide block is provided with a fixed base, the lower surface of the fixed base is provided with a connecting hanging ring, the two sides of the lower surface of the connecting hanging ring are both provided with connecting drawn wires, one end of each connecting drawn wire is provided with a drawn wire interface, two wire drawing interfaces are arranged, the lower surface of each wire drawing interface is provided with a hanger connecting seat, two ends of each hanger connecting seat are provided with connecting rods, one end of each connecting rod is provided with a supporting arm, the electromagnetic block is arranged on the inner wall of the cylindrical clamping block, the electromagnetic block can generate strong electromagnetic attraction force under the electrified state, the cylindrical parts can be adsorbed and fixed, under the condition of no power supply, the electromagnetic attraction force is not generated, and the advantage of the electromagnetic attraction force is that the stability of the cylindrical part in the hoisting process can be enhanced.
However, when the electromagnetic block is used for adsorbing the cylindrical part, the cylindrical part is abraded, and when the cylindrical part has no magnetism, the electromagnetic block cannot exert a stabilizing effect, so that the practicability is not high; when the electromagnetic block is in a high-temperature environment, the electromagnetic block can not play a stable effect; the lifting hook is driven to move through the hydraulic cylinder, so that the operation is complex and the power consumption is large.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem of providing a mechanical horizontal cylinder lifting sling, and solves the problems of complex operation, large power consumption, inapplicability to high-temperature environment and low practicability in the prior art.
In order to solve the technical problems, the technical scheme of the utility model is as follows: the utility model provides a horizontal barrel of mechanical type lifts by crane hoist, its innovation point lies in: the lifting device comprises two U-shaped plate type lifting hooks, a sliding guide rail and two lever type self-weight opening and closing structures, wherein the two U-shaped plate type lifting hooks are symmetrically arranged on the sliding guide rail, the lever type self-weight opening and closing structures are arranged between the U-shaped plate type lifting hooks and the sliding guide rail, and the U-shaped plate type lifting hooks are moved or locked through the lever type self-weight opening and closing structures;
the sliding guide rail is a horizontally arranged I-shaped structure body and comprises an upper wing plate, and a plurality of bolt holes are formed in the upper surface of the upper wing plate along the length direction of the upper wing plate;
the U-shaped plate type lifting hook comprises a sliding part and a lifting part which are arranged up and down;
the U-shaped plate type lifting hook is sleeved on the sliding guide rail through the sliding part, plate hook side plates are arranged on the sliding part and positioned on two sides of the width of the sliding guide rail, a guide plate arranged towards the bolt hole is fixed on one side of the plate hook side plate far away from the middle part of the sliding guide rail, a through hole is formed in the guide plate and positioned vertically below the bolt hole in a penetrating mode, plate hook transverse connecting plates are arranged on the sliding part and positioned on the upper side and the lower side of the sliding guide rail, a roller is further arranged between each plate hook transverse connecting plate and the sliding guide rail, and the U-shaped plate type lifting hook moves back and forth on the sliding guide rail through the roller;
the lifting part is of an L-shaped structure fixed at the lower part of the sliding part, so that a rectangular lifting area with an opening direction facing the middle part of the sliding guide rail is formed between the lifting part and the sliding part, the inner angles of the rectangular lifting area are all in arc transition, and the contact surface of the rectangular lifting area and the lifted cylinder body is also of an arc structure;
the lever type dead weight opening and closing structure comprises a front end feeler lever, a transmission lever and a locking bolt;
the integral height of the front end feeler lever is greater than that of the I-shaped structure body, a movable distance is reserved between the top of the front end feeler lever and the inner top surface of the sliding guide rail, the length of the locking bolt is less than that of the sliding guide rail, and the movable distance must be reserved between the upper part of the front end tactile sensation and the upper wing plate of the sliding guide rail;
the transmission lever and the sliding guide rail are parallel to each other and are arranged inside two sides of the sliding guide rail, the middle part of the transmission lever is movably connected to the plate hook side plate through a bolt, the front end of the transmission lever is arranged towards the middle part of the sliding guide rail and is fixedly provided with the front end contact rod, the top of the front end contact rod is positioned inside the sliding guide rail and is also provided with a movable roller, the bottom of the front end contact rod extends downwards to form the sliding guide rail, the rear end of the transmission lever is movably connected into a middle clamping groove of the locking bolt through round steel, the bottom of the locking bolt is made into a square structure and clings to the plate hook side plate to prevent the locking bolt from rotating, and the locking bolt is arranged at a through hole of the guide plate;
the lever-type self-weight opening and closing structure is characterized in that a position, close to a front end contact rod, of the lever-type self-weight opening and closing structure is a self-weight unlocking front portion, a position, close to a locking bolt, of the lever-type self-weight opening and closing structure is a self-weight unlocking rear portion, the weight of the self-weight unlocking front portion is larger than that of the self-weight unlocking rear portion, when the self-weight unlocking front portion is in a self-weight state, the self-weight unlocking rear portion moves upwards to push the locking bolt to upwards insert into a bolt hole, and when the bottom of the front end contact rod of the self-weight unlocking front portion is in contact with the upper surface of a hung barrel, the barrel reaction force pushes the front end contact rod to upwards move, and the self-weight unlocking rear portion moves downwards to enable the locking bolt to be separated from the bolt hole.
Furthermore, the top surface of sliding part is fixed with the lug, just still be fixed with the stiffening plate between lug and the sliding part, the hoist and mount of being convenient for strengthens the structural stability of lug simultaneously.
Furthermore, a baffle is fixed at two extending ends of the sliding guide rail to prevent the U-shaped plate-type lifting hook from sliding out and falling.
Furthermore, the middle position department symmetry that lies in sliding guide on sliding guide's the bottom surface is provided with two height limit backup pads, the bottom surface of height limit backup pad is the arc structure, just the summit of the bottom surface arc structure of height limit backup pad is than the bottom surface of sliding part is low 8~12mm, and the bottom surface water flat line of height limit backup pad is higher than the bottom surface water flat line of front end feeler lever, both supports by the davit body and ensures that U type plate-type lifting hook opening aims at by davit body center.
Furthermore, the vertex of the arc-shaped structure of the bottom surface of the high-low limiting supporting plate is 10mm lower than the bottom surface of the sliding part, so that the bottom surface of the sliding part of the U-shaped plate type lifting hook is prevented from being damaged.
The utility model has the advantages that:
1) the lever type self-weight opening and closing structure is a mechanical structure, when the front part of the self-weight unlocking is in a self-weight state, the rear part of the self-weight unlocking moves upwards to push the locking bolt to be upwards inserted into the bolt hole, and the U-shaped plate type lifting hook is locked not to move; when the bottom of the front end feeler lever at the front part of the self-weight unlocking is contacted with the upper surface of the hung cylinder, the reaction force of the cylinder body pushes the front end feeler lever to move upwards, the rear part of the self-weight unlocking moves downwards until the locking bolt is separated from the bolt hole, and the U-shaped plate type lifting hook is released to clamp the hung cylinder; the automatic pin aligning and pulling device can realize automatic pin aligning and pulling, realize automatic clamping and falling of hung cylinders made of different materials, do not need external force driving, greatly reduce energy consumption, and simultaneously can be suitable for high-temperature environment operation, hook unhooking does not need personnel to ascend, is economical and convenient, greatly improves working efficiency, reduces labor intensity of workers, avoids risks caused by personnel contacting high temperature, and has strong practicability;
2) the lifting lugs are fixed on the top surfaces of the sliding parts, and the reinforcing plates are further fixed between the lifting lugs and the sliding parts, so that the lifting is convenient, the structural stability of the lifting lugs is enhanced, the lifting safety is ensured, the lifting device is suitable for different lifting capacities, and the sliding guide rail is made of I-shaped steel, so that the whole weight is light, and the manufacturing cost is low;
the inner angle of the rectangular hoisting area of the U-shaped plate type lifting hook and the contact surface of the rectangular hoisting area and the hoisted cylinder body are in arc transition, so that the contact state of the U-shaped plate type lifting hook and the hoisted cylinder body can be improved, the damage to the surface of the hoisted cylinder body is reduced, and the protection effect is achieved;
3) according to the utility model, two high-low limiting supporting plates are symmetrically arranged at the middle position of the sliding guide rail on the bottom surface of the sliding guide rail, so that the suspended cylinder body can be supported, the rectangular hoisting area of the U-shaped plate type lifting hook is ensured to be aligned to the center of the suspended cylinder body, and the hoisting precision is ensured.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a cross-sectional view of a mechanical horizontal drum sling according to the present invention.
Fig. 2 is a partial structure enlarged view of the mechanical horizontal cylinder lifting sling according to the present invention.
Fig. 3 is a partial structural plan view of the mechanical horizontal cylinder lifting sling according to the present invention.
Fig. 4 is a first illustration of the adjustment of the spacing between U-shaped plate hooks prior to use of a mechanical horizontal drum lifting spreader of the present invention.
Fig. 5 is a second diagram of the alignment of the U-shaped plate hook of the mechanical horizontal cylinder lifting sling to the cylinder to be lifted.
Fig. 6 is a third diagram of the mechanical horizontal cylinder body lifting sling in which a hung cylinder body is clamped by U-shaped plate type lifting hooks.
Fig. 7 is a fourth diagram for adjusting unhooking of a U-shaped plate type lifting hook of the mechanical horizontal cylinder lifting sling.
Fig. 8 is a fifth diagram of the mechanical horizontal cylinder lifting sling with unhooked U-shaped plate type lifting hooks.
Fig. 9 is a sixth diagram of the mechanical horizontal cylinder lifting sling with unhooked U-shaped plate type lifting hook.
Detailed Description
Fig. 1 to fig. 3 show a horizontal barrel of mechanical type lifts by crane hoist, including two U template formula lifting hook 1, sliding guide 2 and two lever dead weight open and close structures 3, two U template formula lifting hooks 1 symmetry are installed on sliding guide 2, and lever dead weight open and close structure 3 sets up between U template formula lifting hook 1 and sliding guide 2 to remove or lock U template formula lifting hook 1 through lever dead weight open and close structure 3.
The sliding guide rail 2 comprises a horizontally arranged I-shaped structural body 23, which comprises an upper wing plate, and a plurality of bolt holes 22 are arranged on the upper surface of the upper wing plate along the length direction. The two extending ends of the I-shaped structural body 232 are respectively fixed with a baffle 21 to prevent the U-shaped plate-type lifting hook 1 from sliding off and sliding off.
Two high-low limiting support plates 24 are symmetrically arranged at the middle positions of the sliding guide rail 2 on the bottom surface of the sliding guide rail 2, the bottom surfaces of the high-low limiting support plates 24 are of arc structures, the top points of the arc structures on the bottom surfaces of the high-low limiting support plates 24 are 10mm lower than the bottom surface of the sliding part 11, and therefore the U-shaped plate type lifting hook 1 is supported and aligned to the center of a lifted cylinder body.
The U-shaped plate type lifting hook 1 comprises a sliding part 11 and a lifting part 12 which are arranged up and down.
The U-shaped plate type lifting hook 1 is sleeved at two extending sides of the sliding guide rail 2 through the sliding part 11.
The width both sides that sliding part 11 is located sliding guide 2 all are equipped with board hook curb plate 111, one side of keeping away from sliding guide 2 middle part on board hook curb plate 111 is fixed with the deflector 112 that sets up towards bolt hole 22, and the vertical below that lies in bolt hole 22 on deflector 112 link up and has seted up a through-hole, the upper and lower both sides that sliding part 11 is located sliding guide 2 all are equipped with board hook transverse connection board 113, and still be equipped with gyro wheel 114 between board hook transverse connection board 113 and sliding guide 2, U-shaped plate type lifting hook 1 passes through gyro wheel 114 round trip movement on sliding guide 2.
Lifting lugs 4 are fixed on the top surfaces of the sliding portions 11, and reinforcing plates 5 are further fixed between the lifting lugs 4 and the sliding portions 11, so that the lifting is facilitated, and the structural stability of the lifting lugs 4 is enhanced.
Hoisting portion 12 is for fixing the L shape structure of keeping away from sliding guide 2 middle part one side in the 11 bottom surfaces of sliding part for constitute a rectangle hoisting region 13 that an opening direction set up towards sliding guide 2 middle part between hoisting portion 12 and the sliding part 11, and the 13 interior angles in rectangle hoisting region all adopt the circular arc transition, and rectangle hoisting region 13 also is the arc structure with the contact surface of being hung the barrel.
The lever type deadweight opening and closing structure 3 includes a front end feeler lever 31, a transmission lever 32, and a lock latch 33.
The overall height of the front-end feeler lever 31 is greater than that of the I-shaped structure body, a movable distance is reserved between the top of the front-end feeler lever and the inner top surface of the sliding guide rail, and the height of the locking bolt 33 is smaller than that of the sliding guide rail.
The transmission lever 32 and the sliding guide rail 2 are parallel to each other and are arranged inside both sides of the sliding guide rail 2, and the middle part of the transmission lever 32 is movably connected to the plate hook side plate 111 through a bolt.
The front end of the transmission lever 32 is provided and fixed with a front end feeler lever 31 towards the middle of the sliding guide rail 2, the top of the front end feeler lever 31 is positioned inside the sliding guide rail 2 and is provided with a movable roller 34, and the bottom of the front end feeler lever 31 extends downwards to the bottom horizontal line of the front end feeler lever 31 to be shorter than the bottom horizontal line of the sliding guide rail 2.
The rear end of the transmission lever 32 is movably connected into a middle clamping groove of the locking bolt through round steel, the bottom of the locking bolt 33 is made into a square structure and clings to the plate hook side plate 111 to prevent the locking bolt from rotating, and the locking bolt 33 is installed at a through hole of the guide plate 112.
The lever-type self-weight opening and closing structure 3 is a self-weight unlocking front part close to the front end contact rod 31, the lever-type self-weight opening and closing structure 3 is a self-weight unlocking rear part close to the locking bolt 33, the weight of the self-weight unlocking front part is larger than that of the self-weight unlocking rear part, when the self-weight unlocking front part is in a self-weight state, the self-weight unlocking rear part moves upwards to push the locking bolt 33 to upwards insert into the bolt hole 22, when the bottom of the front end contact rod 31 of the self-weight unlocking front part is in contact with the upper surface of a hung barrel, the front end contact rod 31 moves upwards, and the self-weight unlocking rear part moves downwards to the locking bolt 33 to be separated from the bolt hole 22.
The working principle of this patent:
as shown in fig. 4 to 9, firstly, lifting lugs on two U-shaped plate type lifting hooks are connected with slings and shackles on the ground, a traction rope is installed on the U-shaped plate type lifting hooks, the middle part of the lifting appliance is placed on a ground support, so that the two U-shaped plate type lifting hooks are suspended, the distance L between the two U-shaped plate type lifting hooks on the lifting appliance is adjusted according to the width B of a cylinder to be lifted, so that L = (100-300 mm) + B, at the moment, the lever type dead weight opening and closing structure is in a locked state, the lifting appliance is lifted at the moment, and the two U-shaped plate type lifting hooks cannot slide inwards;
then, the lifting appliance is lifted to the upper part of the cylinder body, is aligned to the center and falls on the cylinder body to be lifted, so that two U-shaped lifting hooks can fall on two ends of the cylinder body;
the hook is slowly released, so that the unlocking device opens the locking bolt under the action of the gravity of the hanger part, the U-shaped plate type lifting hook is released, the U-shaped plate type lifting hook slides inwards under the action of the horizontal component force of the sling to clamp the barrel, and then the barrel is lifted to a specified position;
when unhooking, the crane is required to firstly loosen the hook so that the weight of the lifting appliance acts on the top of the cylinder body, then the traction rope is pulled on the ground to pull the two U-shaped plate type lifting hooks out of the cylinder body along the sliding guide rail, the pulling distance is larger than about 600mm, the U-shaped plate type lifting hooks are locked by the mechanical unlocking device again, and then the hook is lifted again. Or a small distance of about 300mm is pulled outwards, then the U-shaped plate-type lifting hook for lifting the hook slides inwards along with the horizontal component force of the sling towards the inner side, and when the U-shaped plate-type lifting hook slides to the locking bolt passing through one locking bolt hole at the inner side, the locking bolt locks the plate-type lifting hook, and unhooking is completed.
It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.
Claims (4)
1. The utility model provides a horizontal barrel of mechanical type lifts by crane hoist which characterized in that: the lifting device comprises two U-shaped plate type lifting hooks, a sliding guide rail and two lever type self-weight opening and closing structures, wherein the two U-shaped plate type lifting hooks are symmetrically arranged on the sliding guide rail, the lever type self-weight opening and closing structures are arranged between the U-shaped plate type lifting hooks and the sliding guide rail, and the U-shaped plate type lifting hooks are moved or locked through the lever type self-weight opening and closing structures;
the sliding guide rail is a horizontally arranged I-shaped structure body and comprises an upper wing plate, and a plurality of bolt holes are formed in the upper surface of the upper wing plate along the length direction of the upper wing plate;
the U-shaped plate type lifting hook comprises a sliding part and a lifting part which are arranged up and down;
the U-shaped plate type lifting hook is sleeved on the sliding guide rail through the sliding part, plate hook side plates are arranged on the sliding part and positioned on two sides of the width of the sliding guide rail, a guide plate arranged towards the bolt hole is fixed on one side of the plate hook side plate far away from the middle part of the sliding guide rail, a through hole is formed in the guide plate and positioned vertically below the bolt hole in a penetrating mode, plate hook transverse connecting plates are arranged on the sliding part and positioned on the upper side and the lower side of the sliding guide rail, a roller is further arranged between each plate hook transverse connecting plate and the sliding guide rail, and the U-shaped plate type lifting hook moves back and forth on the sliding guide rail through the roller;
the lifting part is of an L-shaped structure fixed at the lower part of the sliding part, so that a rectangular lifting area with an opening direction facing the middle part of the sliding guide rail is formed between the lifting part and the sliding part, the inner angles of the rectangular lifting area are all in arc transition, and the contact surface of the rectangular lifting area and the lifted cylinder body is also of an arc structure;
the lever type dead weight opening and closing structure comprises a front end feeler lever, a transmission lever and a locking bolt;
the integral height of the front end feeler lever is greater than that of the I-shaped structure body, a movable distance is reserved between the top of the front end feeler lever and the inner top surface of the sliding guide rail, and the length of the locking bolt is smaller than that of the sliding guide rail;
the transmission lever and the sliding guide rail are parallel to each other and are arranged inside two sides of the sliding guide rail, the middle part of the transmission lever is movably connected to the plate hook side plate through a bolt, the front end of the transmission lever is arranged towards the middle part of the sliding guide rail and is fixedly provided with the front end contact rod, the top of the front end contact rod is positioned inside the sliding guide rail and is also provided with a movable roller, the bottom of the front end contact rod extends downwards to form the sliding guide rail, the rear end of the transmission lever is movably connected into a middle clamping groove of the locking bolt through round steel, the bottom of the locking bolt is made into a square structure and clings to the plate hook side plate to prevent the locking bolt from rotating, and the locking bolt is arranged at a through hole of the guide plate;
the lever-type self-weight opening and closing structure is characterized in that a position, close to a front end contact rod, of the lever-type self-weight opening and closing structure is a self-weight unlocking front portion, a position, close to a locking bolt, of the lever-type self-weight opening and closing structure is a self-weight unlocking rear portion, the weight of the self-weight unlocking front portion is larger than that of the self-weight unlocking rear portion, when the self-weight unlocking front portion is in a self-weight state, the self-weight unlocking rear portion moves upwards to push the locking bolt to upwards insert into a bolt hole, and when the bottom of the front end contact rod of the self-weight unlocking front portion is in contact with the upper surface of a hung barrel, the barrel reaction force pushes the front end contact rod to upwards move, and the self-weight unlocking rear portion moves downwards to enable the locking bolt to be separated from the bolt hole.
2. The mechanical horizontal cylinder hoisting sling according to claim 1, wherein: lifting lugs are fixed on the top surface of the sliding portion, and reinforcing plates are further fixed between the lifting lugs and the sliding portion.
3. The mechanical horizontal cylinder hoisting sling according to claim 1, wherein: and a baffle is fixed at the two extending ends of the sliding guide rail.
4. The mechanical horizontal cylinder hoisting sling according to claim 1, wherein: the bottom surface of sliding guide is located sliding guide's intermediate position department symmetry and is provided with two height limit backup pads on sliding guide's the bottom surface, the bottom surface of height limit backup pad is the arc structure, just the summit of the bottom surface arc structure of height limit backup pad is compared the bottom surface of sliding part is low 8~12mm, and the bottom surface water flat line of height limit backup pad is higher than the bottom surface water flat line of front end feeler lever.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122376462.1U CN215886026U (en) | 2021-09-29 | 2021-09-29 | Mechanical horizontal cylinder lifting sling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122376462.1U CN215886026U (en) | 2021-09-29 | 2021-09-29 | Mechanical horizontal cylinder lifting sling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215886026U true CN215886026U (en) | 2022-02-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122376462.1U Active CN215886026U (en) | 2021-09-29 | 2021-09-29 | Mechanical horizontal cylinder lifting sling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215886026U (en) |
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2021
- 2021-09-29 CN CN202122376462.1U patent/CN215886026U/en active Active
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