CN108204041B - Building steel structure connecting device and connecting structure - Google Patents

Abstract

The invention provides a connecting device and a connecting structure for a building steel structure, and belongs to the field of building engineering. The connecting device for the building steel structure comprises a center sleeve, a first clamp body, a second clamp body, a driving device and a clamping device. The first clamp body is fixed on the outer side of the central sleeve and comprises a base portion, a first clamping portion and a second clamping portion, and the first clamping portion and the second clamping portion are connected with the base portion. The second clamp body is movably arranged on the outer side of the central sleeve, and an extrusion part is arranged on the second clamp body. The driving device can drive the second clamp body to move towards the direction close to the first clamp body, so that the first clamping portion and the second clamping portion are extruded by the extruding portion, and the first clamping portion and the second clamping portion are close to each other. The clamping device comprises an actuating piece, the actuating piece is movably connected with the central sleeve, the actuating piece is provided with a clamping end, and the distance between the clamping end and the base is adjustable. The connecting device can limit the relative column swing of the cross beam in two directions, and the cross beam and the column have good firmness after being connected through the connecting device.

Description

Building steel structure connecting device and connecting structure

Technical Field

The invention relates to the field of constructional engineering, in particular to a connecting device and a connecting structure for a construction steel structure.

Background

At present, the application of steel structure building is very general, and in steel structure building, the connection structure of stand and crossbeam is very important, must guarantee to have sufficient fastness. In the prior art, the upright post and the cross beam are generally connected by the connecting plate, and the firmness of the upright post and the cross beam after connection is poor.

Disclosure of Invention

The invention aims to provide a connecting device for a building steel structure, which aims to solve the problem of poor firmness after connection of a stand column and a cross beam.

The invention aims to provide a connecting structure to solve the problem that after a stand column and a cross beam are connected, the firmness is poor.

The invention is realized by the following steps:

in view of the first object, the present invention provides a construction steel structure connection device, including:

a central sleeve;

the first clamp body is fixed on the outer side of the central sleeve and comprises a base part, a first clamping part and a second clamping part, the first clamping part and the second clamping part are connected with the base part, and the first clamping part, the base part and the second clamping part define a containing groove;

the second clamp body is movably arranged on the outer side of the central sleeve, at least one extrusion part is arranged on the second clamp body, and the extrusion parts correspond to the first clamp body one to one;

the driving device can drive the second clamp body to move towards the direction close to the first clamp body, so that the pressing part presses the first clamping part and the second clamping part to enable the first clamping part and the second clamping part to be close to each other;

the clamping devices correspond to the first clamp bodies one to one, each clamping device comprises an executing piece, the executing pieces are movably connected with the center sleeve, each executing piece is provided with a clamping end, and the distance between each clamping end and the corresponding base portion is adjustable.

In a preferred embodiment of the present invention, the pressing portion includes a first guiding inclined surface and a second guiding inclined surface, when the second clamp moves in a direction approaching the first clamp, the first guiding inclined surface can push the first clamping portion to approach the second clamping portion, and the second guiding inclined surface can push the second clamping portion to approach the first clamping portion.

In a preferred embodiment of the present invention, the pressing portion is a pressing groove provided on the second clamp body.

In a preferred embodiment of the present invention, the actuating member is rotatably connected to the center sleeve, and the rotation of the actuating member relative to the center sleeve can reduce the distance between the clamping end and the base.

In a preferred embodiment of the present invention, the clamping device further includes a wedge slidably disposed in the center housing, and when the wedge slides relative to the center housing, the wedge can push the actuator to rotate relative to the center housing, and move the clamping end toward the base and the center housing simultaneously.

In a preferred embodiment of the present invention, the center sleeve is provided with a jack communicated with the inside of the center sleeve, and a projection of the receiving groove in the length direction of the first clip body is completely located in the jack.

In the preferred embodiment of the invention, the building steel structure connecting device further comprises a locking piece, a sliding hole communicated with the interior of the central sleeve is formed in the central sleeve, and the locking piece can be slidably inserted into the sliding hole;

when the actuating piece rotates relative to the central sleeve and enables the clamping end to move towards the direction close to the base and the central sleeve simultaneously, the actuating piece can push the locking piece to slide in the sliding hole, and one end of the locking piece extends into the central sleeve.

In a preferred embodiment of the present invention, the second clamp body is provided with a limiting hole for the rotation of the actuating member, and the actuating member is inserted into the limiting hole;

the retaining member with be equipped with the elastic component between the center cover, the elastic component acts on the retaining member, so that the executive component with the pore wall of limiting hole offsets and leans on.

In a preferred embodiment of the present invention, the second clamp body is sleeved outside the central sleeve, the number of the extrusion portions is four, and the four extrusion portions are circumferentially and uniformly distributed on the second clamp body;

the driving device comprises a driving piece which is in threaded connection with the central sleeve, and the driving piece rotates relative to the central sleeve and can push the second clamp body to move towards the direction close to the first clamp body.

Based on the second purpose, the invention provides a connecting structure, which comprises upright posts, cross beams and the building steel structure connecting device;

the central sleeve is sleeved on the outer side of the upright column and fixed, the cross beam is arranged in the accommodating groove, the first clamping part and the second clamping part are clamped on two sides of the cross beam in the width direction, and the base part and the executing part are clamped on two sides of the cross beam in the thickness direction.

The invention has the beneficial effects that:

the invention provides a building steel structure connecting device, when in use, a central sleeve is sleeved on the outer side of an upright post and is fixed; the cross beam is arranged in the accommodating groove, and under the action of the driving device, the first clamping part and the second clamping part can be close to each other by the extrusion part, so that two sides of the cross beam in the width direction are clamped, and the cross beam is prevented from swinging left and right relative to the stand column; because the distance between the clamping end of the executing part and the base of the first clamp body is adjustable, when the distance between the clamping end of the executing part and the base of the first clamp body is shortened, the executing part and the base can clamp two sides of the cross beam in the thickness direction, and the cross beam is prevented from swinging up and down relative to the stand column. The connecting device can limit the relative column swing of the cross beam in two directions, and the cross beam and the column have good firmness after being connected through the connecting device.

The invention provides a connecting structure, which comprises the building steel structure connecting device and has all the advantages of the building steel structure connecting device.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural view of a construction steel structure connection device provided in embodiment 1 of the present invention;

FIG. 2 is a schematic view of the construction of the center sleeve shown in FIG. 1;

FIG. 3 is a schematic structural view of the first clip body;

FIG. 4 is a schematic structural view of the second clip body;

FIG. 5 is a cross-sectional view V-V shown in FIG. 4;

FIG. 6 is a schematic view of the first clip body and the second clip body shown in FIG. 1 engaged with each other;

FIG. 7 is a schematic structural view of the retaining member shown in FIG. 1;

fig. 8 is a schematic view of a connection structure provided in embodiment 2 of the present invention.

Icon: 100-construction steel structure connecting device; 10-a central sleeve; 11-a central hole; 12-external threads; 13-a chute; 14-a hinged seat; 15-a projection; 151-sliding hole; 16-convex strips; 17-a jack; 20-a first clamp body; 21-a first clamping part; 22-a base; 23-a second clamping portion; 24-accommodating grooves; 30-a second clamp body; 31-trepanning; 32-extrusion grooves; 321-a first guiding ramp; 322-a second guiding ramp; 33-a limiting pore; 34-a guide groove; 35-a fixing rod; 40-a drive device; 50-a clamping device; 51-an actuator; 511-a clamping end; 512-a contact end; 52-wedge block; 60-a locking member; 61-a head; 62-a rod portion; 70-an elastic member; 200-a connecting structure; 210-a column; 220-cross beam.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the embodiments of the present invention, it should be noted that the indication of the orientation or the positional relationship is based on the orientation or the positional relationship shown in the drawings, or the orientation or the positional relationship which is usually placed when the product of the present invention is used, or the orientation or the positional relationship which is usually understood by those skilled in the art, or the orientation or the positional relationship which is usually placed when the product of the present invention is used, and is only for the convenience of describing the present invention and simplifying the description, but does not indicate or imply that the indicated device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, cannot be understood as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present invention, it should be further noted that the terms "disposed" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, unless explicitly stated or limited otherwise; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1

As shown in fig. 1, the present embodiment provides a construction steel structure connecting device 100 for connecting a column 210 and a beam 220, which includes a center sleeve 10, a first clamp 20, a second clamp 30, a driving device 40, a clamping device 50 and a locking member 60.

Wherein, as shown in fig. 2, the central sleeve 10 is used for matching with the upright column 210, the central sleeve 10 is cylindrical and is provided with a central hole 11, and the shape of the central hole 11 is set according to the shape of the upright column 210, and can be round, square, etc. The central sleeve 10 is provided with an external thread 12, a sliding groove 13, a hinge seat 14, a convex part 15, a convex strip 16 and an insertion hole 17 from top to bottom in sequence. External threads 12 are provided on the top of the center sleeve 10. The sliding groove 13 is formed along the tangential direction of the central sleeve 10, and the sliding groove 13 is a rectangular groove formed in the outer wall of the central sleeve 10. In this embodiment, the number of the sliding grooves 13 is four, and the distance between two adjacent sliding grooves 13 is 90 degrees. The hinge seat 14 is strip-shaped, and the hinge seat 14 extends along the radial direction of the center sleeve 10. In this embodiment, there are four hinge seats 14, and the four hinge seats 14 are uniformly distributed on the central sleeve 10. The protruding portion 15 is cylindrical, the protruding portion 15 is disposed on the outer wall of the central sleeve 10 and extends outward along the radial direction of the central sleeve 10, a sliding hole 151 is disposed on the protruding portion 15, and the sliding hole 151 penetrates through the inner wall of the central sleeve 10. In this embodiment, there are four protrusions 15, that is, there are four sliding holes 151, and the four protrusions 15 are evenly distributed on the central sleeve 10. Ribs 16 are provided on the outer wall of the center housing 10, the ribs 16 being arranged in the axial direction of the center housing 10. In this embodiment, four convex strips 16 are provided, and the four convex strips 16 are circumferentially and uniformly disposed on the central sleeve 10. The jack 17 is a rectangular hole, and the jack 17 penetrates through the outer wall and the inner wall of the central sleeve 10. In this embodiment, the number of the insertion holes 17 is four, and the four insertion holes 17 are uniformly distributed on the central sleeve 10.

As shown in fig. 3, the cross section of the first clip body 20 is a U-shaped structure, the first clip body 20 includes a first clip portion 21, a base portion 22 and a second clip portion 23, one end of the first clip portion 21 is connected with one end of the base portion 22, one end of the second clip portion 23 is connected with the other end of the base portion 22, the first clip portion 21 is parallel to the second clip portion 23, and the first clip portion 21 and the second clip portion 23 are perpendicular to the base portion 22. The first clamping portion 21, the base portion 22 and the second clamping portion 23 together define a receiving groove 24, and the receiving groove 24 is a U-shaped groove. Each of the first clamping portion 21 and the second clamping portion 23 has an elastic deformation capability, and when the first clamping portion 21 and the second clamping portion 23 are subjected to an inward pressing force, the first clamping portion 21 and the second clamping portion 23 will elastically deform relative to the base portion 22, so that the first clamping portion 21 and the second clamping portion 23 approach each other. When the external force applied to the first clamping portion 21 and the second clamping portion 23 is removed, the first clamping portion 21 and the second clamping portion 23 will be restored.

As shown in fig. 1, in this embodiment, there are four first clip bodies 20, four first clip bodies 20 are uniformly distributed on the outer side of the central sleeve 10, one end of each first clip body 20 is fixed to the outer wall of the central sleeve 10, and the first clip bodies 20 extend along the radial direction of the central sleeve 10. The accommodating groove 24 is arranged upwards, the projection of the accommodating groove 24 in the length direction of the first clamp body 20 is completely positioned in the insertion hole 17, and the length direction of the first clamp body 20 is the radial direction of the center sleeve 10.

As shown in fig. 4 and 5, the second clip body 30 is circular, a sleeve hole 31 is formed in the center of the second clip body 30, and the diameter of the sleeve hole 31 matches with the outer diameter of the central sleeve 10. The lower surface of the second clamp body 30 is provided with four extrusion parts, and the extrusion parts correspond to the first clamp body 20 one by one, namely four extrusion parts. In this embodiment, the extrusion portion is an extrusion groove 32 disposed on the lower surface of the second clamp body 30, and the four extrusion grooves 32 are circumferentially and uniformly distributed on the lower surface of the second clamp body 30. One end of the pressing groove 32 penetrates through the peripheral wall of the second clip body 30, and the other end of the pressing groove 32 penetrates through the hole wall of the trepan boring 31. The section of the extrusion groove 32 is isosceles trapezoid, the extrusion groove 32 has two inclined groove walls, one groove wall is a first guiding inclined surface 321, the other groove wall is a second guiding inclined surface 322, and the distance between the end of the first guiding inclined surface 321 connected with the lower surface of the second clamp body 30 and the end of the second guiding inclined surface 322 connected with the lower surface of the second clamp body 30 is smaller than the distance between the end of the first guiding inclined surface 321 far away from the lower surface of the second clamp body 30 and the end of the second guiding inclined surface 322 far away from the lower surface of the second clamp body 30. The upper surface of the second clamp body 30 is provided with a limiting hole 33, the limiting hole 33 is communicated with the extrusion groove 32, the limiting hole 33 is in a strip shape, and the limiting hole 33 is arranged along the radial direction of the second clamp body 30. In this embodiment, the number of the limiting holes 33 is four, and the four limiting holes 33 are evenly distributed on the circumference. The hole wall of the sleeve hole 31 is provided with a guide groove 34, one end of the guide groove 34 penetrates through the upper surface of the second clamp body 30, the other end of the guide groove 34 is communicated with the extrusion groove 32, and the width of the guide groove 34 is consistent with the width of the convex strip 16 on the center sleeve 10. In this embodiment, the number of the guide grooves 34 is also four. In addition, in this embodiment, the upper surface of the second clamping body 30 is further provided with four fixing rods 35, the fixing rods 35 are arranged along the axial direction of the second clamping body 30, and the four fixing rods 35 are uniformly distributed on the circumference.

As shown in fig. 1, the second clip body 30 is sleeved outside the center sleeve 10, that is, the center sleeve 10 is inserted into the sleeve hole 31, the second clip body 30 is located between the first clip body 20 and the protrusion 15 on the center sleeve 10, the pressing groove 32 faces the receiving groove 24, and the protruding strip 16 on the center sleeve 10 is clamped in the guiding groove 34 on the second clip body 30, so that the second clip body 30 can move on the center sleeve 10 along the axial direction of the center sleeve 10. Because the convex strips 16 are clamped in the guide grooves 34, the second clamp body 30 can only move axially and cannot rotate relative to the central sleeve 10. As shown in fig. 6, when the second clip body 30 moves axially downward relative to the center sleeve 10, i.e. the second clip body 30 moves toward the first clip body 20 relative to the center sleeve 10, the first clipping portion 21 will contact the first guiding inclined surface 321, and the second clipping portion 23 will contact the second guiding inclined surface 322. In the process of downward movement of the second clamping body 30, the first guiding inclined surface 321 will press the first clamping portion 21 to elastically deform in the direction close to the second clamping portion 23, so that the first clamping portion 21 is close to the second clamping portion 23, and the second guiding inclined surface 322 will press the second clamping portion 23 to elastically deform in the direction close to the first clamping portion 21, so that the second clamping portion 23 is close to the first clamping portion 21, thereby realizing mutual close of the first clamping portion 21 and the second clamping portion 23.

In the present embodiment, as shown in fig. 1, the drive means 40 comprises a drive member provided with an internal thread matching the external thread 12 on the central sleeve 10. The driving member is screwed to the outside of the center hub 10. When the driving member rotates relative to the center sleeve 10 and moves downward along the center sleeve 10, the driving member will contact with the fixing rod 35 on the second clamp body 30, thereby pushing the second clamp body 30 to move toward the first clamp body 20, and finally causing the first clamping portion 21 and the second clamping portion 23 to approach each other.

The clamping devices 50 correspond to the first clamp bodies 20 one by one, namely four clamping devices 50 are provided. In this embodiment, the clamping device 50 includes an actuator 51 and a wedge 52. The actuating member 51 is rod-shaped, and the actuating member 51 has two ends in the length direction, namely a clamping end 511 and a contact end 512. The actuating member 51 is hinged on the hinge seat 14 on the center sleeve 10, and the actuating member 51 is arranged in the limiting hole 33 in a penetrating way. The wedge block 52 is slidably arranged in the sliding slot 13 of the center sleeve 10, the contact end 512 of the actuating member 51 is in contact with the wedge block 52, and when the wedge block 52 slides in the sliding slot 13, the actuating member 51 rotates relative to the center sleeve 10, so that the clamping end 511 simultaneously moves towards the base 22 and the center sleeve 10, and the distance between the clamping end 511 and the base 22 of the first clamp body 20 is reduced. Of course, the actuator 51 can only rotate within the limit hole 33.

As shown in fig. 7, the locking member 60 includes a head portion 61 and a shaft portion 62, the head portion 61 of the locking member 60 is a hemisphere, one end of the shaft portion 62 is fixedly connected to the head portion 61, and the diameter of the shaft portion 62 matches the aperture of the sliding hole 151 of the center sleeve 10. As shown in fig. 1, the shaft portion 62 of the locker 60 is inserted into the sliding hole 151, and the elastic member 70 is disposed between the head portion 61 and the protrusion 15 of the center sleeve 10. In this embodiment, the elastic member 70 is a spring, and the spring is sleeved on the outer side of the rod portion 62. Under the action of the spring, the head 61 of the locking member 60 abuts against the actuating member 51, and the actuating member 51 abuts against the hole wall for limiting the counterbore, so that the actuating member 51 is in an inclined state. When actuating member 51 is rotated relative to center housing 10 and clamping end 511 of actuating member 51 is moved in a direction toward base 22 and center housing 10, actuating member 51 will push retaining member 60 to slide within slide opening 151 such that the end of shank 62 of retaining member 60 remote from head 61 extends into center housing 10.

When in use, the central sleeve 10 is sleeved on the outer side of the upright post 210. The cross beam 220 is disposed in the receiving groove 24, and the cross beam 220 passes through the insertion hole 17 of the center sleeve 10 to contact with the upright post 210. The pushing wedge 52 slides relative to the center sleeve 10 and pushes the actuating member 51 to rotate, the distance between the clamping end 511 of the actuating member 51 and the base 22 of the first clamp body 20 is reduced, the actuating member 51 and the base 22 can clamp two sides of the cross beam 220 in the thickness direction, and the cross beam 220 is prevented from swinging up and down relative to the upright post 210. During the process of clamping the cross beam 220, the clamping end 511 will move towards the center sleeve 10, so that the cross beam 220 generates a certain pushing force on the upright post 210, and a certain locking effect is provided for the center sleeve 10 and the upright post 210. In addition, during the rotation of the actuating member 51, the locking member 60 will slide in the sliding hole 151, and the rod portion 62 of the locking member 60 will contact the upright post 210 and generate a large pushing force, so as to lock the center sleeve 10 with the upright post 210, and ensure that the center sleeve 10 will not move axially relative to the upright post 210. Subsequently, by rotating the driving member and pushing the second clip body 30 to slide in a direction approaching the first clip body 20, the first and second guiding slopes 321 and 322 of the pressing groove 32 elastically deform and approach the first and second clamping portions 21 and 23, thereby clamping the two sides of the cross beam 220 in the width direction and preventing the cross beam 220 from swinging left and right with respect to the opposite column 210. The connecting device can limit the swinging of the cross beam 220 relative to the upright post 210 in two directions, and the cross beam 220 and the upright post 210 have good firmness after being connected through the connecting device.

In this embodiment, the number of the first clamping bodies 20 and the number of the clamping devices 50 are four, and under the action of the second driving device 40, the second clamping body 30 can simultaneously drive the four first clamping bodies 20 to clamp the four cross beams 220, so as to limit the four cross beams 220 from swinging left and right relative to the upright column 210, and the clamping efficiency is high. In other embodiments, the number of first clamping bodies and clamping devices 50 can be more than one.

In this embodiment, the actuating member 51 is rotatably connected to the center housing 10, and the distance between the clamping end 511 of the actuating member 51 and the base 22 is changed by rotating the actuating member 51 to clamp the cross beam 220. In other embodiments, the actuating member 51 may be connected to the center housing 10 in other manners, for example, the actuating member 51 is slidably connected to the center housing 10, and the vertical sliding of the actuating member 51 relative to the center housing 10 may also change the distance between the clamping end 511 and the base 22.

In this embodiment, the pressing portion for driving the first clamping portion 21 and the second clamping portion 23 to approach each other is a pressing groove 32 formed on the second clamping body 30, which is simple in structure and convenient to manufacture. In other embodiments, the pressing portion may have other structures, such as a protrusion disposed on the second clip body 30, as long as the protrusion has two guiding slopes.

In this embodiment, the actuator 51 is rotated by sliding the wedge 52, so that the actuator 51 can be more labor-saving in the process of clamping the cross beam 220. In other embodiments, the wedge 52 may not be provided, and since the locking member 60 makes the actuating member 51 abut against the wall of the limiting hole 33 under the action of the elastic member 70, when the actuating member moves downward on the second clamp body 30, the second clamp body 30 may also drive the actuating member 51 to rotate, so as to clamp the cross beam 220, i.e., the movement of the actuating member may drive the second clamp body 30, the actuating member 51 and the locking member 60 to move simultaneously. In this embodiment, when the cross beam 220 is not clamped, under the action of the elastic element 70, the actuating element 51 generates a moving clamping force on the hole wall of the limiting hole 33, and after the second clamp body 30 is lifted upwards, the actuating element 51 can limit the second clamp body 30 at the position, and the actuating element 51 does not fall down by its own weight, so that the cross beam 220 can be inserted into the receiving groove 24 of the first clamp body 20.

Example 2

As shown in fig. 8, the present embodiment provides a connection structure 200 including a column 210, a beam 220, and the building structure connection device of the above embodiment.

The central sleeve 10 is sleeved outside the upright post 210, and the locking member 60 locks the central sleeve 10 and the upright post 210. In this embodiment, there are four cross beams 220, the four cross beams 220 are respectively disposed in the receiving slots 24 of the four first clamping bodies 20, the first clamping portion 21 and the second clamping portion 23 are clamped on two sides of the cross beam 220 in the width direction, and the base portion 22 and the actuator 51 are clamped on two sides of the cross beam 220 in the thickness direction.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The utility model provides a building steel structure connecting device which characterized in that includes:

a central sleeve;

the first clamp body is fixed on the outer side of the central sleeve and comprises a base part, a first clamping part and a second clamping part, the first clamping part and the second clamping part are connected with the base part, and the first clamping part, the base part and the second clamping part define a containing groove;

the second clamp body is movably arranged on the outer side of the central sleeve, at least one extrusion part is arranged on the second clamp body, and the extrusion parts correspond to the first clamp body one to one;

the driving device can drive the second clamp body to move towards the direction close to the first clamp body, so that the pressing part presses the first clamping part and the second clamping part to enable the first clamping part and the second clamping part to be close to each other;

the clamping devices correspond to the first clamp bodies one to one, each clamping device comprises an executing piece, the executing pieces are movably connected with the center sleeve, each executing piece is provided with a clamping end, and the distance between each clamping end and the corresponding base portion is adjustable.

2. The connecting device for building steel structures according to claim 1, wherein the pressing portion includes a first guide slope capable of pushing the first clamping portion to be close to a second clamping portion when the second clamping body moves in a direction to be close to the first clamping body, and a second guide slope capable of pushing the second clamping portion to be close to the first clamping portion.

3. The connecting device for building steel structures as claimed in claim 2, wherein the pressing part is a pressing groove provided on the second clamping body.

4. The structural steel connection device of claim 1, wherein the actuator is rotatably connected to the center housing, and rotation of the actuator relative to the center housing reduces the distance between the clamping end and the base.

5. The structural steel connection device of claim 4, wherein the clamping device further comprises a wedge slidably disposed in the center housing, and when the wedge slides relative to the center housing, the wedge pushes the actuator to rotate relative to the center housing and move the clamping end in a direction approaching the base and the center housing simultaneously.

6. The connecting device for building steel structures as claimed in claim 5, wherein the central sleeve is provided with a jack communicated with the inside of the central sleeve, and the projection of the accommodating groove in the length direction of the first clamp body is completely positioned in the jack.

7. The connecting device for the building steel structures as claimed in claim 4, further comprising a locking member, wherein the center sleeve is provided with a sliding hole communicated with the inside of the center sleeve, and the locking member is slidably inserted into the sliding hole;

when the actuating piece rotates relative to the central sleeve and enables the clamping end to move towards the direction close to the base and the central sleeve simultaneously, the actuating piece can push the locking piece to slide in the sliding hole, and one end of the locking piece extends into the central sleeve.

8. The connecting device for the building steel structures as claimed in claim 7, wherein the second clamp body is provided with a limiting hole for the rotation of the actuating member, and the actuating member is arranged in the limiting hole in a penetrating manner;

the retaining member with be equipped with the elastic component between the center cover, the elastic component acts on the retaining member, so that the executive component with the pore wall of limiting hole offsets and leans on.

9. The connecting device for the building steel structure according to any one of claims 1 to 8, wherein the second clamp body is sleeved outside the central sleeve, the number of the extrusion parts is four, and the four extrusion parts are circumferentially and uniformly distributed on the second clamp body;

the driving device comprises a driving piece which is in threaded connection with the central sleeve, and the driving piece rotates relative to the central sleeve and can push the second clamp body to move towards the direction close to the first clamp body.

10. A connecting structure comprising columns, beams and the connecting device for construction steel structures as claimed in any one of claims 1 to 9;

the central sleeve is sleeved on the outer side of the upright column and fixed, the cross beam is arranged in the accommodating groove, the first clamping part and the second clamping part are clamped on two sides of the cross beam in the width direction, and the base part and the executing part are clamped on two sides of the cross beam in the thickness direction.

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