CN117702930B - Embedded steel structure node and connection method thereof - Google Patents

Abstract

An embedded steel structure node and a connecting method thereof comprise an H-shaped cross beam, a box-shaped upright post, a cover plate and an elastic fixing component; the elastic fixing component is provided with a wedge body, an adjusting rod is connected to the wedge body in a threaded mode, and a pressure spring A and a pressure spring B are arranged on two sides of the adjusting rod. When in connection, the H-shaped cross beam is hung into the caulking grooves of the pair of box-shaped stand columns, and then the cover plate is fixed outside the caulking grooves of the box-shaped stand columns through bolts; and (3) screwing the set screw, pressing the web plate of the H-shaped beam on the transverse vertical plate through the wedge body, and then using the torque wrench to rotate the adjusting rod positively and reversely until the torque value indicated by the torque wrench is the lowest. The node can automatically eliminate the influence of the H-shaped cross beam on the box-shaped upright post caused by heat expansion and cold contraction, and the H-shaped cross beam is in a state similar to that of no tensile stress. The invention innovates the steel structure node in stress and connection modes, solves the common defects of the existing node, and greatly improves the efficiency, safety and reliability of steel structure construction.

Description

Embedded steel structure node and connection method thereof

Technical Field

The invention relates to the field of steel structures, in particular to an embedded steel structure node and a connecting method thereof.

Background

The steel structure is one of the common structural forms of modern constructional engineering and is widely applied to the fields of large-scale factory buildings, stadiums, super-high buildings, bridges and the like. The steel structure mainly comprises upright posts, cross beams, trusses and other components made of profile steel and steel plates, all the components are connected through joints, and the design and the connection mode of the joints are critical to the overall performance and the safety of the steel structure.

Referring to fig. 1, fig. 1 shows the connection structure of the upright post and the cross beam which are most common in the prior art. In the prior art, the cross beam 7 is bolted between adjacent uprights 6, which allows for removability of the uprights 6 from the cross beam 7. The cross beam 7 is equivalent to a two-force rod, and when the upright post 6 bears a bending moment, the cross beam 7 applies a pulling force or a pushing force to the upright post 6, so that the upright post 6 is kept in a stable state.

Referring to fig. 2, fig. 2 shows a node structure which is most commonly used in the prior art, and a node plate 8 is vertically welded to the upright 6. Referring to fig. 3, fig. 3 shows a modified structure of the node of fig. 2, which increases the connection strength of the gusset 8 with the pillar 6 by welding the upper and lower wing plates. However, regardless of the improvement, existing cantilever nodes suffer from the following common drawbacks:

1. the node is of a cantilever structure, so that the stress state is poor; the node is subjected to a pushing and pulling force in the horizontal direction, and also subjected to a supporting reaction force, a shearing force and a bending moment.

2. The strength of the node is completely dependent on the quality of the welding of the node plates to the uprights, and once welding problems occur, the node is at risk of breaking.

3. The overhanging end of the gusset plate is provided with a connecting hole, and the overhanging end is connected to a web plate of the H-shaped steel through a bolt; in terms of mechanical structure, the overhanging end is the weakest area of the gusset, and is most likely to distort and fracture when subjected to external forces.

4. The strength of the connection of the gusset to the web depends entirely on the shear resistance of the bolts, and once the bolts break, the beam is at risk of falling.

5. The crossbeam can produce pulling force or pushing force to the upright post under the influence of expansion with heat and contraction with cold, and the pushing and pulling force not only damages the stable state of the upright post, but also can cause the bending of the side upright post.

In summary, innovation needs to be performed on the steel structure node in the stress and connection modes, and common defects existing in the existing node are at least partially overcome.

Disclosure of Invention

In order to overcome the defects in the background technology, the invention discloses an embedded steel structure node and a connecting method thereof. The aim is that: the steel structure node is improved and innovated in stress and connection modes, and the common defects existing in the existing node are partially or even completely overcome.

In order to achieve the aim of the invention, the invention adopts the following technical scheme:

an embedded steel structure node comprising:

the H-shaped cross beam is characterized in that V-shaped blocks are welded at two ends of a web plate of the H-shaped cross beam, and each V-shaped block is provided with a V-shaped groove arranged along the vertical direction;

The box-shaped upright posts are provided with caulking grooves for being embedded into the end parts of the H-shaped cross beams, and the distance between two adjacent box-shaped upright posts is smaller than the length of the H-shaped cross beams;

The cover plate is fixed outside the box-type upright post caulking groove through a bolt, the outer side of the cover plate is in threaded connection with a set screw, the inner side of the cover plate is provided with a chute, and the chute is arranged along the horizontal direction;

The elastic fixing assembly is inserted into the chute; the elastic fixing component is provided with a wedge body corresponding to the V-shaped groove, and the wedge body can be tightly propped in the V-shaped groove by rotating the set screw; at least one adjusting rod is connected on the wedge body in a threaded manner along the horizontal direction, and one end of the adjusting rod extends out of the cover plate; the two sides of the adjusting rod are respectively provided with a pressure spring A and a pressure spring B, and the elasticity applied to the wedge body by the pressure spring A and the pressure spring B can be adjusted by rotating the adjusting rod.

After the technical scheme is implemented, the following beneficial effects can be generated:

1. the node is an embedded connecting structure, and the H-shaped cross beam is transversely arranged in the caulking groove of the pair of box-shaped stand columns. In terms of mechanical structure, the H-shaped cross beam transverse frame is of a simple support structure and only bears the support reaction force from the caulking groove and the clamping force from the wedge body. Likewise, the node also only receives the opposing forces from the H-beam. The stress state of the node is greatly improved because the node is not subjected to shearing force and bending moment.

2. This node is embedded connection structure, even the node welding problem appears, or the bolt breaks, H type crossbeam also can not drop.

3. The node and the H-shaped cross beam do not need to be connected by bolts, and the node does not have a weak area in structure, so that the node has higher compression resistance and torsion resistance.

4. When the H-shaped cross beam stretches out and draws back because of hot and cold environment, the elastic fixing component can automatically eliminate the influence of the stretching out and drawing back of the H-shaped cross beam on the box-shaped stand column.

According to the technical scheme, the caulking groove comprises a notch arranged on the box-shaped upright post, and the shape of the notch corresponds to that of the H-shaped cross beam; the notch is welded with a transverse vertical plate, a longitudinal vertical plate and a bottom plate, wherein the transverse vertical plate is used for supporting a web plate of the H-shaped beam, and the bottom plate is used for supporting a lower wing plate of the H-shaped beam.

After the technical scheme is implemented, the following beneficial effects can be generated:

1. The shape of the notch corresponds to that of the H-shaped cross beam, and the freedom degree of the H-shaped cross beam can be limited in a certain range.

2. The arrangement of the notch reduces the strength of the box upright, but the arrangement of the transverse upright, the longitudinal upright and the bottom plate improves the strength of the box upright at the notch position, so that the integral strength of the box upright is not only reduced, but also improved at the notch position.

3. The caulking groove is horizontally arranged, so that the hanging-in and connection of the H-shaped cross beam are facilitated.

The technical proposal is further improved, the adjusting rod consists of a rod body and a column body arranged in the middle part of the rod body; the cylinder is provided with external threads, and is in threaded connection with the wedge body through the external threads; the compression spring A is arranged between one side of the column body and the cover plate, and the compression spring B is arranged between the other side of the column body and the longitudinal vertical plate.

After implementing the technical scheme, the beneficial effects that it produced are: the adjusting rod is rotated clockwise, so that the pressure spring B can be compressed, the pressure spring A can be extended, and the elasticity applied to the adjusting rod and the wedge body by the pressure spring B is gradually increased; the adjusting rod is rotated anticlockwise, so that the pressure spring A is compressed, the pressure spring B is extended, and the elasticity applied to the adjusting rod and the wedge body by the pressure spring A is gradually increased.

Further improving the technical scheme, the pressing length of the pressure springs A and B is 2-8mm.

After implementing the technical scheme, the beneficial effects that it produced are: the H-shaped beam stretches and contracts in limited quantity due to hot and cold environments, and when the stretching limit is exceeded, the compression spring A or the compression spring B is in a parallel pressing state. At this time, the compression spring a or the compression spring B can be regarded as a rigid body, and the connection between the H-shaped beam and the node can be regarded as a unidirectional rigid connection.

According to the technical scheme, a strip hole is formed in the cover plate, one end of the rod body penetrates through the strip hole and extends out of the cover plate, and a quadrangular column head used for being connected with a torque wrench is arranged at the extending end of the rod body.

After implementing the technical scheme, the beneficial effects that it produced are: the four prismatic heads are arranged, so that the torque of the adjusting rod can be conveniently measured through the torque wrench.

The connection method of the embedded steel structure node comprises the following steps:

s1: two ends of the H-shaped cross beam are horizontally hung into the caulking grooves of a pair of box-shaped stand columns, so that the lower wing plate of the H-shaped cross beam falls on the bottom plate, and the web plate is abutted against the transverse stand plates;

s2: inserting the elastic fixing assembly into the chute of the cover plate, aligning the wedge body with the V-shaped groove on the H-shaped cross beam, and fixing the cover plate outside the embedded groove of the box-shaped upright post through bolts;

S3: and (3) screwing the set screw, pressing the web plate of the H-shaped beam on the transverse vertical plate through the wedge body, and then using the torque wrench to rotate the adjusting rod positively and reversely until the torque value indicated by the torque wrench is the lowest.

After the technical scheme is implemented, the following beneficial effects can be generated:

1. The lifting of the H-shaped cross beam is convenient to realize, and the H-shaped cross beam does not have the falling risk in the lifting process.

2. The positive and negative rotation adjusting rod enables the torque value indicated by the torque wrench to be the lowest, so that the H-shaped cross beam is in a state of approximately no tensile stress after being installed, and the stable state of the box-shaped stand column is not affected.

3. The influence of H-shaped cross beams on the box-shaped stand columns caused by hot and cold expansion and contraction can be automatically eliminated, and the side stand columns are prevented from being bent.

Drawings

Fig. 1 shows the connection structure of the upright post and the cross beam which are the most common in the prior art.

Fig. 2 shows the node structure most commonly used in the prior art.

Fig. 3 shows a modified structure of the node of fig. 2.

Fig. 4 shows a schematic structure of the end of the H-beam.

Fig. 5 shows a schematic structural view of the box column caulking groove.

Fig. 6 shows a schematic view of the structure of the cover plate at a single viewing angle.

Fig. 7 shows a schematic view of the structure of the cover plate in another view.

Fig. 8 shows a schematic structural view of the elastic fixing assembly.

Fig. 9 shows a schematic structural view of the adjusting lever.

Fig. 10 is a schematic cross-sectional view of the present node.

Fig. 11 shows a simplified diagram of fig. 10.

Fig. 12 is a schematic diagram showing a connection structure of the node and the H-beam.

Fig. 13 shows a schematic diagram of step S1.

Fig. 14 shows a schematic diagram of step S2.

Fig. 15 shows a schematic diagram of step S3.

Figure 16 shows a schematic cross-section of a node connection to an H-beam.

Drawings

1. An H-shaped cross beam; 1.1, a web plate; 1.2, V-shaped blocks; 1.3, lower wing plate; 1.4, upper wing plate;

2. A box-type upright post; 2.1, caulking groove; 2.11, notch; 2.12, a transverse vertical plate; 2.13, a longitudinal vertical plate; 2.14, a bottom plate; 2.2, threaded holes;

3. A cover plate; 3.1, a chute; 3.2, a set screw; 3.3, a strip hole; 3.4, connecting holes;

4. an elastic fixing component; 4.1, wedge; 4.2, adjusting the rod; 4.21, a rod body; 4.22, a column; 4.23, four prism heads; 4.3, a compression spring A;4.4, a compression spring B;

5. A rigid mount;

6. a column;

7. a cross beam;

8. And (5) a node plate.

Detailed Description

Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present invention, and are not intended to limit the scope of the present invention. It should be noted that, in the description of the present invention, terms such as "front", "rear", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus are not to be construed as limiting the present invention. It should also be noted that, in the description of the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; either directly or indirectly through intermediaries, or in communication with each other. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to the specific circumstances.

An embedded steel structure node comprises an H-shaped cross beam 1, a box-shaped upright post 2, a cover plate 3 and an elastic fixing component 4, and the structure and the function of the embedded steel structure node are specifically described below.

Reference is made to fig. 4. The H-shaped cross beam 1 is formed by welding a web plate 1.1, an upper wing plate 1.4 and a lower wing plate 1.3, V-shaped blocks 1.2 are welded at two ends of the web plate 1.1, and the V-shaped blocks 1.2 are provided with V-shaped grooves arranged along the vertical direction.

Reference is made to fig. 5. The box-type upright post 2 is provided with a caulking groove 2.1, the caulking groove 2.1 is used for horizontally embedding the end part of the H-shaped cross beam 1, and a plurality of threaded holes 2.2 are arranged on the upper and lower arrays of the caulking groove 2.1. Specifically, the caulking groove 2.1 comprises a notch 2.11 arranged on the box-shaped upright post 2, the shape of the notch 2.11 corresponds to that of the H-shaped cross beam 1, and the freedom degree of the H-shaped cross beam 1 can be limited in a certain range. The notch 2.11 is welded with a transverse vertical plate 2.12, a longitudinal vertical plate 2.13 and a bottom plate 2.14, wherein the transverse vertical plate 2.12 is used for supporting a web plate 1.1 of the H-shaped cross beam 1, and the bottom plate 2.14 is used for supporting a lower wing plate 1.3 of the H-shaped cross beam 1. Although the notch 2.11 reduces the strength of the box column 2, the transverse upright 2.12, the longitudinal upright 2.13 and the bottom plate 2.14 are reinforced at the notch 2.11. Through finite element analysis, the strength of the notch 2.11 part is not reduced, but is improved.

It is worth noting that the distance between two adjacent box-shaped upright posts 2 is smaller than the length of the H-shaped cross beam 1, and the H-shaped cross beam 1 transversely frames the caulking grooves 2.1 of the two adjacent box-shaped upright posts 2. The distance between two adjacent upright posts is larger than the length of the cross beam.

Reference is made to fig. 6 and 7. The cover plate 3 is an angle plate, a plurality of connecting holes 3.4 corresponding to the threaded holes 2.2 are formed in the cover plate 3, and the cover plate 3 is fixed to the outside of the caulking groove 2.1 of the box-type upright post 2 through bolts. The outside spiro union at apron 3 has holding screw 3.2, is equipped with spout 3.1 at the inboard of apron 3, and spout 3.1 sets up along the horizontal direction. In addition, three strip holes 3.3 are provided on the cover plate 3.

Reference is made to fig. 8. The elastic fixing component 4 is provided with a wedge-shaped body 4.1 corresponding to the V-shaped groove, the bottom of the wedge-shaped body 4.1 can be inserted into the sliding groove 3.1 on the cover plate 3, and the wedge-shaped body 4.1 can be tightly propped in the V-shaped groove of the V-shaped block 1.2 by rotating the set screw 3.2. Three adjusting rods 4.2 are connected to the wedge-shaped body 4.1 in a threaded manner along the horizontal direction, and a pressure spring A4.3 and a pressure spring B4.4 are respectively arranged on two sides of the adjusting rods 4.2.

Reference is made to fig. 9. The adjusting rod 4.2 is composed of a rod body 4.21 and a column body 4.22 arranged in the middle of the rod body 4.21. The cylindrical surface of the cylinder 4.22 is provided with external threads, and the cylinder 4.22 is in threaded connection with the wedge-shaped body 4.1 through the external threads. One end of the rod body 4.21 penetrates through the strip hole 3.3 and extends out of the cover plate 3, and a quadrangular prism head 4.23 used for connecting a torque wrench is arranged at the extending end of the rod body 4.21.

Referring to fig. 10. As can be seen from fig. 10, the compression spring a4.3 is mounted between one side of the cylinder 4.22 and the cover plate 3, and the compression spring B4.4 is mounted between the other side of the cylinder 4.22 and the longitudinal riser 2.13. After the cover plate 3 is fixed on the box-type upright post 2 through bolts, the compression springs A4.3 and B4.4 are compressed in the X direction, and at this time, the compression springs A4.3 and B4.4 are loaded with precompression.

Referring to fig. 11, fig. 11 is a simplified diagram of fig. 10. In the operating state, the wedge 4.1 is subjected to the tightening force Fn from the set screw 3.2 and also to the precompression Fa from the compression spring a4.3 and to the precompression Fb from the compression spring B4.4. If the pre-pressure Fa is not equal to the pre-pressure Fb, the web 1.1 will be subjected to a tensile or compressive stress from the compression springs. The rotation of the adjusting lever 4.2 can adjust the elastic force exerted by the compression springs a4.3 and B4.4 on the wedge 4.1. The adjusting rod 4.2 is rotated clockwise, so that the precompression force Fb is increased and Fa is reduced; the rotation of the adjustment lever 4.2 counter-clockwise increases the pre-pressure Fa and decreases Fb.

The restriction of this node to H type crossbeam 1 in X direction is elasticity, and when H type crossbeam 1 stretches out and draws back because of hot cold environment, the influence that H type crossbeam 1 stretches out and draws back to box stand 2 that the accessible fixed subassembly 4 caused. Since the H-beam 1 stretches and contracts by a limited amount due to the hot and cold environment, the compression spring a4.3 or the compression spring B4.4 can be brought into a compressed state when the stretching limit is exceeded. In this case, the compression springs a4.3 and B4.4 may be regarded as rigid bodies, and the connection of the H-beam 1 to the joint may be regarded as unidirectional rigid connection. The pressing length of the compression springs A4.3 and B4.4 is determined according to the expansion and contraction amount of the H-shaped beam 1, and the longer the H-shaped beam 1 is, the larger the pressing length of the compression springs A4.3 and B4.4 is; the shorter the H-beam 1, the smaller the compression and length of the compression springs a4.3 and B4.4. Typically, the compression and length of the compression springs a4.3 and B4.4 are set within 2-8 mm.

Reference is made to fig. 12. As can be seen from fig. 12, the node is an embedded connection structure, and the H-shaped cross beam 1 is transversely arranged in the caulking grooves 2.1 of the pair of box-shaped upright posts 2. In terms of mechanical structure, the transverse frame of the H-shaped cross beam 1 is of a simply-supported structure and only bears the Z+ supporting reaction force from the bottom plate 2.14 and the Y-supporting pressure from the wedge-shaped body 4.1. Likewise, the node is also subjected to only the opposing forces from the H-beam 1. The stress state of the node is greatly improved because the node is not subjected to shearing force and bending moment.

It can also be seen that the node is embedded in the box column 2, and the node has high compression resistance and torsion resistance because the box column 2 has a large cross section.

It can also be seen that the present joint and the H-beam 1 do not need to be bolted, and the joint does not have a structurally weak area, and even if the joint has a welding problem or the bolts are broken, the H-beam 1 is unlikely to fall.

In order to further explain the connection and adjustment process of the node, the invention also discloses a connection method of the embedded steel structure node, which comprises the following steps:

s1: referring to fig. 13, the two ends of the H-beam 1 are horizontally suspended into the caulking grooves 2.1 of the pair of box-shaped columns 2, so that the lower wing plates 1.3 of the H-beam 1 fall on the bottom plate 2.14, and the web plates 1.1 are abutted against the transverse vertical plates 2.12.

Obviously, this way the difficulty of mounting the H-beam 1 is greatly reduced, and the H-beam 1 is not at risk of falling.

S2: referring to fig. 14, the resilient fixing member 4 is inserted into the slide groove 3.1 of the cover plate 3, and the wedge 4.1 is aligned with the V-groove of the H-beam 1, and then the cover plate 3 is fixed to the outside of the caulking groove 2.1 of the box column 2 by bolts.

S3: referring to fig. 15, the set screw 3.2 is tightened, the web 1.1 of the H-beam 1 is pressed against the transverse riser 2.12 by the wedge 4.1, and the adjusting lever 4.2 is then rotated in the forward and reverse directions using the torque wrench until the torque indicated by the torque wrench is the lowest.

The adjusting rod 4.2 is rotated positively and negatively to enable the torque value indicated by the torque wrench to be the lowest, and the aim is to enable the precompression Fa exerted by the pressure spring A4.3 on the web plate 1.1 to be equal to the precompression Fb exerted by the pressure spring B4.4 on the web plate 1.1. Therefore, the H-shaped cross beam 1 is in a state without approximately tensile stress after being installed, and the stable state of the box-shaped upright post 2 is not affected. In the use, the elastic fixing component 4 can automatically eliminate the influence of the H-shaped cross beam 1 on the box upright post 2 caused by heat expansion and cold contraction, and prevent the side upright post from bending.

It is noted that the torque of the adjustment lever 4.2 may be measured periodically during use. If the measured torque value is greater than the previously adjusted minimum torque value, it is indicated that the H-beam 1 is subjected to tensile or compressive stress. By analyzing the stress source, whether the steel structure building has a problem or not can be judged, and the problem is prevented. If there is no problem, the adjusting rod 4.2 can be adjusted to eliminate the stress in time.

The nodes at both ends of the H-beam 1 are not necessarily connected elastically, but one end is connected elastically.

Reference is made to fig. 16. In fig. 16, the nodes on the left box-shaped upright post 2 are rigidly connected, and the nodes on the right box-shaped upright post 2 are elastically connected. Specifically, a rigid fixing piece 5 is arranged in the left node, a sliding sleeve is arranged in the cover plate 3, and the rigid fixing piece 5 can only slide in the sliding sleeve along the Y direction. The fastening screw 3.2 is screwed, so that the rigid fixing piece 5 can be tightly pressed in the V-shaped groove of the V-shaped block 1.2 to rigidly fix the web plate 1.1.

During installation, the H-shaped cross beam 1 is rigidly connected with the node on the left box-shaped upright post 2, and then the H-shaped cross beam 1 is elastically connected with the node on the right box-shaped upright post 2. Obviously, this not only reduces the manufacturing costs of the node, but also reduces the effort required to adjust the elastic fixing assembly 4.

From the above, the invention innovates the steel structure node in the stress and connection modes, solves the common defects of the existing node, and greatly improves the efficiency, safety and reliability of the steel structure construction.

The parts not described in detail are prior art. Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents.

Claims (4)

1. An embedded steel structure node, characterized by: comprising the following steps:

the H-shaped cross beam is characterized in that V-shaped blocks are welded at two ends of a web plate of the H-shaped cross beam, and each V-shaped block is provided with a V-shaped groove arranged along the vertical direction;

The box-shaped upright posts are provided with caulking grooves for being embedded into the end parts of the H-shaped cross beams, and the distance between two adjacent box-shaped upright posts is smaller than the length of the H-shaped cross beams; the caulking groove comprises a notch arranged on the box-shaped upright post, and the shape of the notch corresponds to that of the H-shaped cross beam; a transverse vertical plate, a longitudinal vertical plate and a bottom plate are welded in the notch, the transverse vertical plate is used for supporting a web plate of the H-shaped beam, and the bottom plate is used for supporting a lower wing plate of the H-shaped beam;

The cover plate is an angle plate and is fixed outside the box-type upright post caulking groove through bolts; the side of the cover plate, which is away from the caulking groove, is in threaded connection with a set screw, and the side of the cover plate, which is towards the caulking groove, is provided with a chute which is arranged along the horizontal direction; the cover plate is also provided with a strip hole;

The elastic fixing assembly is inserted into the chute; the elastic fixing component is provided with a wedge body corresponding to the V-shaped groove, and the wedge body can be tightly propped in the V-shaped groove by rotating the set screw; at least one adjusting rod is connected on the wedge body in a threaded manner along the horizontal direction, the adjusting rod consists of a rod body and a column body arranged in the middle of the rod body, and the column body is connected with the wedge body in a threaded manner; one end of the rod body penetrates through the strip hole and extends out of the cover plate, and the other end of the rod body faces the longitudinal vertical plate; a pressure spring A is arranged between the column body and the cover plate, a pressure spring B is arranged between the column body and the longitudinal vertical plate, and the elasticity applied to the wedge body by the pressure spring A and the pressure spring B can be adjusted by rotating the adjusting rod.

2. An embedded steel structure node as claimed in claim 1, wherein: the pressing length of the compression springs A and B is 2-8mm.

3. An embedded steel structure node as claimed in claim 1, wherein: one end of the rod body, which extends out of the cover plate, is provided with a quadrangular column head used for connecting a torque wrench.

4. A method of connecting an embedded steel structure node as claimed in claim 3, characterized by: the method comprises the following steps:

s1: two ends of the H-shaped cross beam are horizontally hung into the caulking grooves of a pair of box-shaped stand columns, so that the lower wing plate of the H-shaped cross beam falls on the bottom plate, and the web plate is abutted against the transverse stand plates;

s2: inserting the elastic fixing assembly into the chute of the cover plate, aligning the wedge body with the V-shaped groove on the H-shaped cross beam, and fixing the cover plate outside the embedded groove of the box-shaped upright post through bolts;

S3: and (3) screwing the set screw, pressing the web plate of the H-shaped beam on the transverse vertical plate through the wedge body, and then using the torque wrench to rotate the adjusting rod positively and reversely until the torque value indicated by the torque wrench is the lowest.