CN217840299U - Assembled replaceable energy-consumption hybrid connection node - Google Patents
Assembled replaceable energy-consumption hybrid connection node Download PDFInfo
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- CN217840299U CN217840299U CN202221619291.9U CN202221619291U CN217840299U CN 217840299 U CN217840299 U CN 217840299U CN 202221619291 U CN202221619291 U CN 202221619291U CN 217840299 U CN217840299 U CN 217840299U
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- 238000005265 energy consumption Methods 0.000 title claims abstract description 14
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 155
- 239000010959 steel Substances 0.000 claims abstract description 155
- 239000004567 concrete Substances 0.000 claims abstract description 80
- 239000011178 precast concrete Substances 0.000 claims abstract description 25
- 239000011372 high-strength concrete Substances 0.000 claims abstract description 14
- 238000010276 construction Methods 0.000 abstract description 31
- 238000000034 method Methods 0.000 description 13
- 230000008569 process Effects 0.000 description 11
- 230000002349 favourable effect Effects 0.000 description 10
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- 238000012360 testing method Methods 0.000 description 3
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- 239000004566 building material Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000011900 installation process Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 239000011376 self-consolidating concrete Substances 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
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- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
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- 239000002002 slurry Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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Abstract
The utility model discloses an assembled replaceable energy-consuming hybrid connecting node, which comprises a steel pipe concrete, a precast concrete beam and an energy-consuming connecting piece; the steel pipe concrete comprises high-strength concrete and a steel pipe, and the high-strength concrete is poured into the steel pipe to form the steel pipe concrete; column end H-shaped steel is arranged on the outer side of the steel tube concrete, and partial concrete is poured on the side face of the column end H-shaped steel; the precast concrete beam comprises precast concrete, precast H-shaped steel and longitudinal bars; the longitudinal bars are fixed on the flange part of the prefabricated H-shaped steel, and a prefabricated concrete beam is formed after the prefabricated concrete is poured; h-shaped steel webs are arranged on the prefabricated H-shaped steel and the column end H-shaped steel and connected through pin shafts; the energy-consuming connecting piece is connected and arranged on the column end H-shaped steel and the prefabricated H-shaped steel through the high-strength bolt. The construction efficiency, the section bearing capacity and the energy consumption capacity of the fabricated building can be obviously improved.
Description
Technical Field
The utility model belongs to the technical field of structural engineering, specifically belong to a removable power consumption hybrid connection node of assembled.
Background
The components used by the fabricated building need to be prefabricated in a factory in advance, and can be installed in a short time after simple treatment on a construction site, so that the construction period of the building is greatly optimized, and the problems of noise, pollution, maintenance, high manufacturing cost and the like in the field installation process are solved. However, in the fabricated type, the connection node is important for the overall performance and the earthquake-resistant performance of the building, and the unreasonable node design and the complex construction process may cause the installation of the components to be insecure, resulting in the problem that the building is seriously damaged or even collapsed under the action of an earthquake.
At present, common fabricated buildings mainly comprise concrete structures, steel structures, modern wood structure buildings and the like, and the traditional fabricated concrete structures are usually connected by adopting sleeve slurry or mechanical connection, so that the requirement on construction precision is high, and the construction quality is difficult to ensure; in a common assembly type steel structure, the problems of large steel consumption, high manufacturing cost, fire prevention, rust prevention and the like are difficult to avoid; the modern wood structure building has the problems of material corrosion, insufficient bearing capacity and the like, and is difficult to be suitable for high-rise buildings. The building is often damaged locally under the action of an earthquake, the surface of the member presents larger cracks and deformation due to the generation of the plastic hinge of the member, the member is difficult to repair through a simple means, and the cast-in-place node has poorer energy consumption capability under the action of the earthquake, so that the improvement of the earthquake resistance of the building is not facilitated.
The traditional steel pipe concrete column-concrete beam adopts a complete wet type connection scheme, the requirement on construction quality is high, the maintenance period is long, the construction efficiency is difficult to improve, and the overall performance and the seismic performance of the structure are difficult to ensure by the frame in the structural form.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem that exists among the prior art, the utility model provides a removable power consumption hybrid connection node of assembled can show efficiency of construction, cross-section bearing capacity and the power consumption ability that promotes assembly type structure. The utility model discloses can effectively improve traditional cast-in-place formula or complete assembly formula steel pipe concrete-concrete beam node by the not enough "fat post" of the thick beam that causes of material strength, residual deformation is too big, the efficiency of construction is low, wholeness ability and anti-seismic performance subalternation problem.
In order to achieve the above object, the utility model provides a following technical scheme:
an assembled replaceable energy-consuming hybrid connecting node comprises concrete filled steel tubes, a precast concrete beam and an energy-consuming connecting piece;
the steel pipe concrete comprises high-strength concrete and a steel pipe, and the high-strength concrete is poured into the steel pipe to form the steel pipe concrete; column end H-shaped steel is arranged on the outer side of the steel tube concrete, and partial concrete is poured on the side surface of the column end H-shaped steel;
the precast concrete beam comprises precast concrete, precast H-shaped steel and longitudinal bars;
the longitudinal bars are fixed on the flange part of the prefabricated H-shaped steel, and a prefabricated concrete beam is formed after the prefabricated concrete is poured;
h-shaped steel webs are arranged on the prefabricated H-shaped steel and the column end H-shaped steel and connected through pin shafts;
the energy-consuming connecting piece is connected with the column end H-shaped steel and the prefabricated H-shaped steel through high-strength bolts.
Preferably, the outer side of the concrete filled steel tube is provided with a ring plate, and the column end H-shaped steel is fixed on the ring plate.
Further, the ring plate is welded to the outer surface of the steel pipe.
Preferably, the middle part of the energy-consuming connecting piece is provided with a plurality of round holes, and two sides of the middle part are provided with arc-shaped notches.
Preferably, the through longitudinal bar is arranged in the concrete filled steel tube and penetrates through a flange part of the H-shaped steel at the end of the concrete filled steel tube connecting column.
Preferably, the longitudinal bars are fixed and welded at the flange part of the prefabricated H-shaped steel through stirrups.
Preferably, the strength grade of the steel pipe is not lower than Q460.
Preferably, the strength grade of the high-strength concrete is not lower than C60.
Compared with the prior art, the utility model discloses following profitable technological effect has:
the utility model provides an assembled replaceable energy consumption hybrid connection node, which can protect a beam column component from being damaged under the action of earthquake by hinging the prefabricated H-shaped steel and the column end H-shaped steel through a pin shaft and arranging a replaceable energy consumption connecting piece, and can enhance the energy consumption capability of the node through the plastic deformation of the energy consumption connecting piece; the energy-consuming connecting piece can be replaced in time after being damaged under the action of an earthquake, the scheme can be repaired under the action of the earthquake, the energy-consuming connecting piece can also be used as an external bracket in the installation process, a concrete beam can be lapped on the surface of the energy-consuming connecting piece in the process of hoisting a test piece, and then mechanical equipment can carry out hoisting work on the next component, so that the hoisting construction speed is favorably improved, and the construction process is simplified. The utility model discloses can set up reinforcing bar and concrete post-cast section on the upper portion of H shaped steel and concrete beam, be favorable to the installation of assembled floor, when reducing construction cycle and cast-in-place process, accord with the demand of the green assembly type building construction of modernization.
Furthermore, the Q690 high-strength thin-wall square steel tube concrete column is adopted as the connecting node, the constraint effect and the buckling resistance of the steel tube can be obviously enhanced by applying a high-strength material, and the self-compacting concrete poured into the steel tube can improve the compactness of the steel tube in the pouring process;
furthermore, the longitudinal bars of the precast concrete beam are welded on the flange surface of the H-shaped steel and fixedly welded together by the stirrups, and the reinforcing steel bars with hooks are arranged on the surface of the web plate to improve the bonding performance between the position of the web plate and the concrete.
Furthermore, the structural form of the energy-consuming connecting piece is manufactured in a circular hole-opening mode, the arc-shaped groove is formed in the side face, the force transmission path of the connecting piece is more met, the middle weak position is favorable for the plastic development of a steel plate, the increase of the load at the connecting piece is avoided, and the component is protected from bearing overlarge load.
Furthermore, a plurality of rows of steel bars are arranged inside the prefabricated steel tube concrete column for connection, the ring plate is arranged on the outer surface of the prefabricated steel tube concrete column, concrete is poured to protect the steel bars from being corroded, the overall performance of the steel tube concrete column and the external prefabricated H-shaped steel can be improved, the load transmitted from the beam end can be transmitted to the core concrete, and the problems of surface stress concentration and local tearing of the high-strength thin-wall steel tube are solved.
Furthermore, the arrangement of the through longitudinal ribs is favorable for improving the overall performance of a node core area, and the problems of beam column force transmission incompatibility and the like are avoided.
Drawings
FIG. 1 is a schematic diagram of an assembled replaceable energy dissipating hybrid connection node;
FIG. 2 is a schematic view of a replaceable energy dissipating hybrid junction connection configuration;
FIG. 3 is a schematic view of a prefabricated section of a concrete filled steel tubular column;
FIG. 4 is a schematic view of a connecting portion of precast concrete beams;
fig. 5 is a schematic view of the internal construction of a concrete filled steel tubular column.
In the drawings: 1, high-strength concrete; a steel pipe 2; a ring plate 3; prefabricating concrete 4; a pin shaft 5; an energy-consuming connecting piece 6; a portion of concrete 7; prefabricating H-shaped steel 8; h-shaped steel web plates 9; longitudinal ribs 10; a stirrup 11; column-end H-section steel 12; a piercing longitudinal rib 13; a high-strength bolt 14.
Detailed Description
The present invention will now be described in further detail with reference to specific examples, which are intended to be illustrative, but not limiting, of the invention.
Examples
The utility model provides a removable power consumption hybrid connection node of assembled can satisfy wholeness ability and anti-seismic performance between the beam column under the condition of hoist and mount beam column component fast, and can quick replacement after damaging.
An assembled replaceable energy-consumption hybrid connecting node comprises a high-strength thin-wall square steel tube concrete column, a precast concrete beam, an outer steel bracket and a connecting device. The high-strength thin-wall square steel pipe concrete consists of a steel pipe 2 and core high-strength concrete 1 poured into the steel pipe; the precast concrete beams are precast and formed in batches in factories, and the connection work of the joint parts can be completed by overlapping and installing the high-strength bolts 14 and the pin shafts 5 on site.
The strength grade of the steel tube 2 of the high-strength square steel tube concrete column is not lower than Q460, and the core high-strength concrete 1 is characterized in that the strength grade is not lower than C60.
The whole precast concrete beam middle beam is completely precast in a factory, a precast H-shaped steel 8 and a thickened H-shaped steel web plate 9 are installed at the end of the beam, longitudinal bars 10 and stirrups 11 of the beam are welded at the flange part of the precast H-shaped steel 8, and then precast concrete 4 is poured. In order to simplify the construction process, a high-strength bolt 14 is adopted to fix an energy-consuming connecting piece 6 at the top of the H-shaped steel 8 in advance.
The whole prefabricated high-strength square steel tube concrete column center column is completely prefabricated in a factory and mainly comprises core high-strength concrete 1, a steel tube 2, a ring plate 3, an energy-consuming connecting piece 6 and column-end H-shaped steel 12. The ring plate 3 needs to be welded on the surface of the steel pipe 2 by adopting a welding technology, the column end H-shaped steel 12 and the ring plate 3 are also connected by adopting welding, and the energy dissipation connecting piece 6 at the bottom is connected by a high-strength bolt 14. In addition, partial concrete 7 is poured on the side surface of the column end H-shaped steel 12 to avoid local buckling of steel flanges.
The middle part of the energy consumption connecting piece 6 is provided with three round holes, and the edge of the plate is weakened by adopting an arc shape. The effective cross-sectional area of the middle part of the plate is weakened, so that local steel can rapidly enter and reach the yield strength, the plastic deformation stage is started, plastic hinges are provided for the precast concrete beam through rotation of the pin shafts 5, and the plastic deformation of the steel can provide better energy consumption capacity. And the stress of the steel entering the plasticity stage cannot be obviously increased, and the steel tends to a stable stress state, and can also avoid the unlimited increase of the load borne by the node core area, so that the purpose of protecting the node core area is achieved, and the design target of a strong node and weak component is more favorably realized. In addition, the energy-consuming connecting piece 6 also meets the requirement of being replaceable, and if the energy-consuming connecting piece is damaged under the action of an earthquake, the energy-consuming connecting piece 6 can be replaced in a mode of disassembling the high-strength bolt 14 on the spot, so that the aim of seismic design that the medium-seismic can be repaired is fulfilled.
The internal structure of the prefabricated high-strength square steel tube concrete column adopts a plurality of straight through longitudinal ribs 13 to penetrate through the steel tube 2 and is welded on the inner side surface of the flange of the H-shaped steel 12 at the column end. The arrangement of the penetrating longitudinal ribs 13 is favorable for improving the overall performance of a node core area, and the problems of beam column force transmission incompatibility and the like are solved. In order to protect the outer penetrating longitudinal bars from being corroded, partial concrete 7 is poured on the side faces of the column end H-shaped steel 12, and the penetrating longitudinal bars 13 ensure that the partial concrete 7 and the column end H-shaped steel 12 have good bonding performance, so that the penetrating longitudinal bars and the column end H-shaped steel 12 can work together.
The utility model discloses a construction order erects at the scene for prefabricated high-strength square steel core concrete column, secondly hoist and mount precast concrete roof beam and put the removable power consumption of column end bottom and connect 6 on, can carry out the hoist and mount work of other components afterwards, does not influence the availability factor of hoist and mount machinery. When the installation is required to be completed, the pin shaft 5 penetrates through the column end H-shaped steel 12 and the prefabricated H-shaped steel 8, and the pin shaft is fixed by the lug plates, so that the pin shaft can rotate while bearing the shearing force of the node part. In addition, the energy-consuming connecting pieces 6 at the column end and the beam end need to be fixed by high-strength bolts 14. The utility model is suitable for a structure that requires high to building fast, mechanical utilization rate height, structure wholeness ability and anti-seismic performance.
The novel connecting node of the utility model adopts the Q690 high-strength thin-wall square steel pipe concrete column, the application of high-strength materials can obviously enhance the constraint effect and the buckling resistance of the steel pipe, and the self-compacting concrete poured into the novel connecting node is favorable for improving the compactness of the steel pipe pouring process;
the utility model welds the longitudinal bar of the precast concrete beam on the flange surface of the H-shaped steel, adopts the stirrup to fix and weld together, and sets the reinforcing bar with the hook on the surface of the web plate, thus improving the bonding performance between the web plate and the concrete;
the utility model discloses set up the connection of multirow reinforcing bar in the inside of prefabricated steel core concrete column, set up the crown plate on the surface of the body, and concreting to protect the reinforcing bar from corroding, and can promote the concrete column of steel core and the whole performance of outside prefabricated H shaped steel, guarantee that the load that the beam-ends transmitted can transmit in the core concrete, reduce the stress concentration of high strength thin wall steel pipe surface and local tearing problem;
the utility model is provided with the hinges between the H-shaped steel ends of the prefabricated H-shaped steel and the prefabricated concrete and the replaceable energy-consuming connecting device, the two devices can protect the beam column component from being damaged under the action of earthquake, and the energy-consuming capacity of the node is enhanced through the plastic deformation of the energy-consuming connecting piece;
the utility model discloses the impaired back of power consumption connecting piece under the earthquake effect can in time be changed, is favorable to the jolt can repair the implementation of scheme to in the installation, the power consumption connecting piece still can regard as external bracket, at the in-process of hoist and mount test piece, can carry out the hoist and mount work of next component with the concrete beam overlap joint on the surface of power consumption connecting piece, mechanical equipment can carry out the construction speed of hoist and mount afterwards, simplifies the construction process.
The utility model discloses the structural style of power consumption connecting piece adopts the circular mode preparation of digging a hole to form to open the arc recess in the side, more accord with the biography power route of connecting piece, middle weak position is favorable to the plasticity development of steel sheet, has avoided the increase of connecting piece department load, and the protection component does not bear too big load.
The utility model discloses can set up reinforcing bar and concrete post-cast section on the upper portion of H shaped steel and concrete beam, be favorable to the installation of assembled floor, when reducing construction cycle and cast-in-place process, accord with the demand of the green assembly type building construction of modernization.
The utility model relates to a removable power consumption hybrid connection node's of assembled installation includes following process, mainly divide into: the method comprises the steps of prefabricating parts in a factory, erecting the concrete-filled steel tubular column on site, hoisting the prefabricated concrete beam and integrally installing on site.
Factory prefabricated test piece
When the factory is used for manufacturing the precast concrete beam, the precast H-shaped steel 8 is installed at the end part of the beam, the precast H-shaped steel 8 is welded well through the longitudinal bars 10 and the stirrups 11, the load borne by the beam is ensured to be transmitted to the precast H-shaped steel 8, and then the precast concrete 4 is poured. In order to simplify the construction process, a high-strength bolt 14 is adopted to fix an energy-consuming connecting piece 6 at the top of the H-shaped steel 8 in advance. When the high-strength square steel tube concrete column is prefabricated in a factory, the steel tube 2 is erected firstly, the position of the longitudinal rib 13 is arranged for punching, then the annular plate 3 and the surface of the column end H-shaped steel 12 to the steel tube 2 are welded, the part extending out of the longitudinal rib 13 is welded to the surface of the annular plate 3, then the core high-strength concrete 1 and the part of the concrete 7 are poured, and the energy-consumption connecting piece 6 at the bottom of the high-strength bolt 14 is screwed up to the column end H-shaped steel 12.
On-site erecting concrete-filled steel tubular column
The steel pipe concrete column manufactured in a factory is hoisted to a foundation on site, and the bottom of the steel pipe concrete column can be fixed by adopting high-strength bolts.
Hoisting precast (prestressed) concrete beam
The precast concrete beam component is transported to a construction site by a factory to be hoisted and placed on the surface of the energy-consuming connecting piece 6, and the pin shaft 5 rapidly penetrates through the column end H-shaped steel 12 and the precast H-shaped steel 8, so that the precast concrete beam component is prevented from being bent due to the fact that the precast concrete beam component bears a large vertical load for a long time.
On-site integral installation
The pin shaft is fixed by the lug plates, so that the pin shaft can rotate while bearing the shearing force of the node part, and the energy-consuming connecting pieces 6 at the column end and the beam end are fixed by high-strength bolts 14, so that the force transfer of the beam and the column is realized together.
The utility model discloses a removable power consumption hybrid connection node of assembled adopts the installation of complete assembly formula to improve the efficiency of construction, and the connected mode of round pin axle can promote machinery's availability factor, and the setting of power consumption connecting piece can guarantee that node or frame construction have good anti-seismic performance to realize repairable target.
The high-strength steel and the high-strength concrete adopted by the high-strength thin-wall square steel tube concrete can overcome the problem of overlarge cross section caused by insufficient strength of the traditional material, and the high-strength steel has a large constraint effect on the core concrete, can fully play the bearing capacity of the high-strength material, and is favorable for reducing the problems of overhigh use and construction cost of building materials and the like. The joint has the connecting form of the pin shaft, so that convenient construction after quick hoisting can be realized, and the construction efficiency of on-site machinery is improved. And a force transmission mode of annular plates, steel plates and longitudinal ribs is arranged in a core area of the node, so that the overall performance of the structure is improved. And the prefabricated concrete beam is provided with the energy-consuming connecting piece, so that the improvement of the anti-seismic performance of the frame is facilitated.
The utility model provides a removable power consumption hybrid connection node of assembled satisfies the assembly rate requirement of current assembled structure construction to can effectively overcome traditional cast-in-place formula or complete assembly formula steel core concrete column-concrete beam cross-sectional design great, the bearing capacity is low, the efficiency of construction is low, maintenance cycle length and anti-seismic performance subalternation problem. By adopting the novel section form and the node construction scheme, the construction efficiency and the structural performance of the novel mixed structure of the concrete filled steel tubular column and the precast concrete beam can be effectively improved, and the concrete filled steel tubular column and the precast concrete beam have better economic benefit and technical advantage when being applied to modern civil buildings, industrial buildings, special buildings and other multi-layer important buildings.
The utility model provides a removable power consumption of assembled mixes connected node can overcome traditional material intensity and not enough cause the too big problem in cross-section to the high-strength steel is great to the constraint effect of core concrete, and the bearing capacity that can the high-strength material of full play is favorable to reducing building material's use and the too high scheduling problem of construction cost.
Claims (8)
1. An assembled replaceable energy-consuming hybrid connecting node is characterized by comprising concrete filled steel tubes, a precast concrete beam and an energy-consuming connecting piece (6);
the steel tube concrete comprises high-strength concrete (1) and a steel tube (2), and the high-strength concrete (1) is poured into the steel tube (2) to form the steel tube concrete; column end H-shaped steel (12) is arranged on the outer side of the steel tube concrete, and partial concrete (7) is poured on the side surface of the column end H-shaped steel (12);
the precast concrete beam comprises precast concrete (4), precast H-shaped steel (8) and longitudinal bars (10);
the longitudinal bars (10) are fixed at the flange part of the prefabricated H-shaped steel (8), and the prefabricated concrete beam is formed after the prefabricated concrete (4) is poured;
h-shaped steel webs (9) are arranged on the prefabricated H-shaped steel (8) and the column end H-shaped steel (12), and the H-shaped steel webs (9) are connected through a pin shaft (5);
the energy-consuming connecting piece (6) is connected with the column end H-shaped steel (12) and the prefabricated H-shaped steel (8) through high-strength bolts (14).
2. An assembled replaceable energy consumption hybrid connection node according to claim 1, characterized in that the outer side of the concrete filled steel tube is provided with a ring plate (3), and the column end H-shaped steel (12) is fixed on the ring plate (3).
3. An assembled replaceable dissipative hybrid connection node according to claim 2, wherein the ring plate (3) is welded to the outer surface of the steel tube (2).
4. The assembled replaceable energy-consuming hybrid connection node as claimed in claim 1, wherein the energy-consuming connection member (6) is provided with a plurality of circular holes at a middle portion, and arc-shaped notches are formed at two sides of the middle portion.
5. The fabricated replaceable energy-consuming hybrid connecting joint as claimed in claim 1, wherein the concrete-filled steel tube is internally provided with a through longitudinal rib (13), and the through longitudinal rib (13) penetrates through a flange part of the H-shaped steel (12) at the end of the concrete-filled steel tube connecting column.
6. The fabricated replaceable energy consumption hybrid connection node as claimed in claim 1, wherein the longitudinal ribs (10) are fixed and welded to the flange part of the prefabricated H-shaped steel (8) through stirrups (11).
7. An assembled replaceable energy consuming hybrid connection node according to claim 1, wherein the steel pipe (2) has a strength rating of no less than Q460.
8. An assembled replaceable energy dissipating hybrid connection node according to claim 1, characterized in that the strength grade of the high strength concrete (1) is not lower than C60.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221619291.9U CN217840299U (en) | 2022-06-22 | 2022-06-22 | Assembled replaceable energy-consumption hybrid connection node |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221619291.9U CN217840299U (en) | 2022-06-22 | 2022-06-22 | Assembled replaceable energy-consumption hybrid connection node |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217840299U true CN217840299U (en) | 2022-11-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221619291.9U Expired - Fee Related CN217840299U (en) | 2022-06-22 | 2022-06-22 | Assembled replaceable energy-consumption hybrid connection node |
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| Country | Link |
|---|---|
| CN (1) | CN217840299U (en) |
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2022
- 2022-06-22 CN CN202221619291.9U patent/CN217840299U/en not_active Expired - Fee Related
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Granted publication date: 20221118 |