Assembling device and method for PEC steel member

Abstract

The invention relates to a PEC steel member splicing device which comprises connecting assemblies, splicing plates, tightening assemblies and electric screwdrivers, the connecting assemblies are fixed to the two ends of a steel member and assist in hoisting of the steel member, fastening holes and positioning holes are formed in the connecting ends of the steel member, the fastening holes in the steel member are arranged at intervals to form an annular structure, and the positioning holes are located in the center of the annular structure. Fastening bolts are vertically arranged on one face of the splice plate and distributed at intervals to form an annular structure, the tightening assembly comprises a positioning head, a fixed bolt and a movable sleeve, the movable sleeve can slide in the axial direction of the fixed bolt, a driving gear is arranged on the movable sleeve, a groove allowing a screwdriver to be inserted is formed in the outer end face of the movable sleeve, and annularly-distributed fastening holes are also formed in the reinforcing plate. The reinforcing plate is attached to the end of the steel member, the splice plate is installed on the outer side of the reinforcing plate, each fastening bolt is sleeved with one gear nut, the driving gear is meshed with each gear nut at the same time, the driving gear is driven by the electric screwdriver to rotate, and synchronous tightening of all the gear nuts is completed.

Description

Technical Field

[0001] The invention relates to an auxiliary device for assembled building construction, in particular to an assembling device and an assembling method for PEC steel components. Background Art

[0002] H-shaped steel is a type of steel with an "H"-shaped cross section, which is widely used in buildings, bridges, machinery manufacturing and other engineering structures. Its unique cross-sectional design makes H-shaped steel excellent in load-bearing and bending resistance, and can effectively disperse the force and provide greater structural stability. This type of steel is usually made by hot rolling or cold rolling process. It has superior performance, good weldability and processability, and has become one of the indispensable materials in modern construction and civil engineering.

[0003] PEC member is a partially covered steel-concrete composite member, referred to as PEC structure, which is a new type of steel-concrete composite structure formed by welding steel bars or flat steel in the H-shaped steel cavity and pouring concrete. This structure includes PEC steel-concrete composite columns, PEC steel-concrete composite beams and PEC steel-concrete composite shear walls. Its cross-sectional structure is similar to that of steel-concrete members, but the H-shaped steel flange is located at the periphery of the cross-sectional area, which contributes more to the bending stiffness and bending bearing capacity of the member, forming a force characteristic different from that of steel-concrete.

[0004] In the prior art, there are multiple defects in the construction and splicing process of PEC steel-concrete composite columns, PEC steel-concrete composite beams and PEC steel-concrete composite shear walls, especially in the operation of tightening nuts in sequence. First, the operation efficiency is low. Traditional manual tightening of nuts takes a long time and requires multiple adjustments to the tool position, which prolongs the construction period. In addition, improper tightening sequence may lead to uneven force at the connection, causing structural deformation or instability, which requires construction personnel to have certain experience and skills, increasing the complexity of construction. Secondly, the risk of nut loosening is high. Construction personnel may fail to apply uniform torque due to fatigue or improper operation, affecting the safety of the structure. At the same time, it is difficult for traditional methods to monitor the tightening torque in real time, and it is impossible to detect in time that the nut is not tightened in place or the torque decreases due to material fatigue, which brings safety hazards. Strong dependence on manual labor is also a major problem. The construction process is highly dependent on manual labor and is easily affected by the technical level and physical condition of construction personnel, resulting in unstable construction quality. Inconsistent connection quality also occurs from time to time. Lack of effective control and standardized operation may cause inconsistent connection quality and affect the bearing capacity of the overall structure. In addition, during the tightening process of multiple nuts, if the tightness of a nut needs to be adjusted, other tightened nuts often need to be removed, which increases the complexity and time cost of the adjustment. Finally, equipment limitations also affect construction. The small space on some construction sites limits the use of tools, and traditional manual tightening tools may not work effectively in these environments.

[0005] In summary, the defects in the operation of tightening the nuts in sequence during the construction and splicing of PEC steel-concrete composite columns, PEC steel-concrete composite beams and PEC steel-concrete composite shear walls not only affect the construction efficiency and quality, but may also bring potential risks to the subsequent structural safety. Therefore, it is particularly important to adopt more efficient and intelligent connection and tightening technologies. Summary of the invention

[0006] The present invention firstly discloses an assembling device for a PEC steel component, which can realize synchronous tightening of a plurality of nuts arranged in a ring shape, thereby helping to improve the connection efficiency of the PEC steel component and improve the reliability of the connection of the PEC steel component.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is: A PEC steel component assembly device includes a PEC steel component, a connection component, a splicing plate, a reinforcement plate, a tightening component, a gear nut and an electric screwdriver. The PEC steel component includes an H-shaped steel and concrete on both sides of the H-shaped steel web. A plurality of through fastening holes are respectively provided at both ends of the H-shaped steel web, and the fastening holes are arranged at intervals to form a circular ring structure. A positioning hole is provided on the web of the H-shaped steel at the center of the circular ring structure, and through holes are symmetrically provided at the ends of the upper and lower flanges of the H-shaped steel; one side of the splicing plate is perpendicular to the splicing plate and provided with a plurality of fastening bolts, which are threaded rods and are arranged at intervals to form a circular ring structure; a plurality of fastening holes are also provided on the reinforcement plate, and the fastening holes on the reinforcement plate are connected to the H-shaped steel web. The outer circumference of the gear nut forms a tooth portion, and the inner hole wall of the gear nut is provided with an internal thread; the tightening assembly includes a connected positioning head and a fixing bolt, a spring and a movable sleeve are provided on the fixing bolt, the spring is located between the positioning head and the movable sleeve, the movable sleeve can slide axially along the fixing bolt, a driving gear is provided on the outer circumference of the movable sleeve, and a groove for inserting an electric screwdriver is provided on the outer end surface of the movable sleeve. The electric screwdriver is inserted into the groove to drive the driving gear to rotate, and the positioning head is used to be inserted into the positioning hole on the web of the H-shaped steel, so that the driving gear is simultaneously engaged with each gear nut sleeved on the fastening bolt; a movable ring for lifting is provided on the connecting assembly, and the connecting assembly is used to be fixed to the end of the H-shaped steel.

[0008] Furthermore, the cross-section of the connecting assembly is a U-shaped structure, and the connecting assembly includes upper and lower relatively arranged blocks and a connecting plate connecting the upper and lower blocks. Bolt holes are symmetrically provided on the upper and lower blocks. A threaded connecting rod is inserted into the bolt hole of the upper block, and a connecting sleeve with an internal thread is inserted into the bolt hole of the lower block. The connecting rod is used to be plugged into the connecting sleeve. A pull ear is provided on the top surface of the upper block, and a movable ring is provided on the pull ear.

[0009] Furthermore, the connection plate is provided with an escape opening through which the splicing plate can pass.

[0010] Furthermore, the positioning head and the fixing bolt in the tightening assembly are both cylindrical, the diameter of the positioning head is larger than the diameter of the fixing bolt, one end of the spring is fixed on the movable sleeve, and the other end of the spring is clamped at the connection between the positioning head and the fixing bolt.

[0011] The present invention also discloses an assembling method for assembling PEC steel components using the above-mentioned assembling device, which specifically comprises the following steps: Step 1: Fix a connection component on each end of the PEC steel member; Step 2: Fix the lifting end of the lifting equipment to the connection assembly and lift the PEC steel structure to the installation location; Step 3: Fit the reinforcing plate to the webs of the connecting ends of the two PEC steel components assembled to each other, align the fastening holes of the reinforcing plate with the fastening holes of the webs of the PEC steel components, and then place the splicing plate on the outside of the reinforcing plate, so that the fastening bolts of the splicing plate are correspondingly inserted into the fastening holes of the reinforcing plate and the webs of the PEC steel components; Step 4: Install a gear nut on each fastening bolt; Step 5: After completing step 4, insert the locating head of the tightening assembly into the locating hole on the web of the PEC steel member, and then press the movable sleeve of the tightening assembly to make the driving gear mesh with each gear nut; Step 6: Insert the driving end of the electric screwdriver into the groove of the movable sleeve, start the electric screwdriver to drive the driving gear to rotate, and the driving gear will simultaneously drive each gear nut to rotate to the locking position.

[0012] The present invention replaces traditional nuts with gear nuts, and uses the fastening bolts of the splicing plate to position each gear nut, so that all the gear nuts are arranged in a ring structure, and designs a tightening assembly that can cooperate with an electric screwdriver and is provided with a driving gear, so that the driving gear of the tightening assembly is located at the center of the gear nuts arranged in the ring, and can engage with each gear nut at the same time. The driving gear of the tightening assembly is driven to rotate by the electric screwdriver, thereby realizing synchronous tightening of all the gear nuts at the connecting ends of the steel components, greatly improving the efficiency of tightening the nuts, ensuring the consistency of force on all gear nuts, and improving the safety and reliability of steel component assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 An exploded view of the steel component assembly device in the embodiment in the use state; Figure 2 It is an exploded view of the splicing plate and the tightening assembly; Figure 3 is a schematic diagram of the structure of the connection components; Figure 4 It is a structural schematic diagram of the tightening assembly; Figure 5 This is a plan view of the distribution positions of tightening components and gear nuts.

[0014] Reference numerals: 1. H-shaped steel body; 2. Concrete; 3. Fastening hole; 4. Connecting assembly; 400. Block; 401. Connecting sleeve; 402. Connecting rod; 403. Pull ear; 404. Movable ring; 405. Avoidance; 5. Splicing plate; 50. Fastening bolt; 6. Tightening assembly; 600. Positioning head; 601. Fixing bolt; 602. Movable sleeve; 603. Driving gear; 604. Spring; 605. Groove; 7. Gear nut; 8. Positioning groove. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0016] This embodiment discloses a PEC steel component assembly device, such as Figure 1 As shown, the PEC steel member includes an H-shaped steel 1 and concrete 2 located on both sides of the web of the H-shaped steel 1. The assembly of the PEC steel members, in this embodiment, involves a reinforcing plate (not shown in the drawings) used for splicing the PEC steel members, and also involves the fixing of the reinforcing plate by the splicing plate 5, and also involves the cooperation of the tightening assembly 6 and the electric screwdriver (the electric screwdriver is also called an electric screwdriver or an electric screwdriver) to perform a synchronous tightening operation on the nuts used to fix the splicing plate 5 and the reinforcing plate, and also involves the connection assembly 4 for assisting the lifting of the PEC steel member.

[0017] Among them, Figure 2 As shown, the body of the splicing plate 5 is a rectangular steel plate, and a plurality of fastening bolts 50 are arranged at intervals on one side of the splicing plate 5. The fastening bolts 50 are cylindrical threaded rods, each fastening bolt 50 is perpendicular to the body, and the plurality of fastening bolts 50 are arranged in a circular ring structure. Figure 2 The gear nut 7 shown has a toothed structure formed on its outer circumference and an internal hole wall provided with an internal thread. A gear nut 7 is sleeved on each fastening bolt 50 of the splicing plate 5 .

[0018] The structure of the connecting component 4 is as follows Figure 3 As shown, the cross section of the connecting component 4 is a U-shaped structure. Figure 3 The direction shown is for reference. The connection assembly 4 includes upper and lower clamping blocks 400 arranged opposite to each other and a connecting plate connecting the upper and lower clamping blocks 400. An avoidance opening 405 is provided on the connecting plate. The size of the avoidance opening 405 needs to ensure that the splicing plate 5 can pass through the avoidance opening 405. Bolt holes are symmetrically provided on the upper clamping block 400 and the lower clamping block 400. A threaded connecting rod 402 is inserted into the bolt hole of the upper clamping block 400. A hollow connecting sleeve 401 with an internal thread is inserted into the bolt hole of the lower clamping block 400. A pull ear 403 is provided on the top surface of the upper clamping block 400. A hole is opened on the pull ear 403 and a movable ring 404 is passed through it.

[0019] The structure of the tightening assembly 6 is as follows Figure 4 As shown, the tightening assembly 6 includes a positioning head 600 , a fixing bolt 601 and a movable sleeve 602 . The positioning head 600 and the fixing bolt 601 are both cylindrical, but the diameter of the positioning head 600 is larger than that of the fixing bolt 601 . One end of the fixing bolt 601 is fixedly connected to the positioning head 600, and the other end of the fixing bolt 601 is sleeved with a movable sleeve 602, and the movable sleeve 602 is a cylindrical sleeve structure. The open end of the movable sleeve 602 is sleeved on the fixing bolt 601, so that the movable sleeve 602 can slide along the axial direction of the fixing bolt 601. A groove 605 for inserting the power supply batch is formed on the outer end surface of the movable sleeve 602. A spring 604 is sleeved on the fixing bolt 601 between the positioning head 600 and the movable sleeve 602. One end of the spring 604 is fixed on the movable sleeve 602, and the other end is limited by the connection between the positioning head 600 and the fixing bolt 601. A driving gear 603 is set on the outer circumference of the movable sleeve 602, and the driving gear 603 is fixed on the movable sleeve 602.

[0020] When PEC steel members are spliced, the PEC steel members are usually hoisted and fixed in position before the splicing ends are fixedly connected using connecting plates and bolts. In order to facilitate the hoisting of the PEC steel members, the connecting components 4 in this embodiment are first fixedly installed at both ends of the PEC steel members, such as Figure 1 As shown, a section of area without concrete 2 is reserved at both ends of the H-beam 1, and a plurality of through fastening holes 3 are provided on the web in the area, which are arranged in a ring structure so that each fastening bolt 50 of the splicing plate 5 can be inserted into each corresponding fastening hole 3. A positioning hole 8 is also provided in the center of the ring structure formed by the fastening holes 3. When installing the connection assembly 4, it is also necessary to symmetrically open through holes on the upper and lower flanges of the connection end of the H-beam 1, fit the upper clamping block 400 of the connection assembly 4 with the top of the upper flange of the H-beam 1, fit the lower clamping block 400 with the bottom of the lower flange of the H-beam 1, pass the connecting rod 402 through the through hole of the upper flange, pass the connecting sleeve 401 through the through hole of the lower flange, rotate the connecting rod 402 to insert it into the connecting sleeve 401, and fix the connection assembly 4 to the end of the H-beam 1.

[0021] As mentioned above, reinforcing plates (not shown in the attached drawings) are required for assembling PEC steel components. The reinforcing plates are used to connect two spliced ​​PEC steel components, and fastening holes corresponding to the webs of the H-shaped steel 1 need to be provided on the reinforcing plates. After the connection assembly 4 is installed, the lifting end of the lifting equipment can be fixedly connected to the movable ring 404, and the PEC steel component can be lifted to the installation position, so that the ends of the two assembled PEC steel components are butted against each other, and then the reinforcing plates are attached to the webs at the ends of the two PEC steel components, so that the fastening holes on the reinforcing plates correspond one to one with the fastening holes 3 on the webs, and then the splicing plate 5 is passed through the avoidance opening 405 of the connection assembly 4 and pressed against the outside of the reinforcing plate, so that the fastening bolts 50 of the splicing plate 5 pass through the fastening holes 3 on the reinforcing plate and the webs, and a gear nut 7 is sleeved on each fastening bolt 50, and then the positioning head 600 of the tightening assembly 6 is inserted into the positioning hole 8 on the web of the H-shaped steel 1, and the movable sleeve 602 is moved, as shown in FIG. Figure 5 As shown, the driving gear 603 is meshed with each gear nut 7 at the same time, the electric screwdriver is inserted into the groove 605 of the tightening component 6, and the electric screwdriver is started to drive the driving gear 603 to rotate. The driving gear 603 synchronously drives each gear nut 7 to rotate, thereby realizing the synchronous nut tightening operation.

[0022] The assembly method of PEC steel components using the above assembly device can be summarized as follows: Step 1: Fix and install a connection component 4 at each end of the PEC steel member; Step 2: Fixedly connect the lifting end of the lifting equipment to the connecting assembly 4, and lift the PEC steel component to the installation position; Step 3: fit the reinforcing plate to the webs of the connecting ends of the two PEC steel components assembled to each other, align the fastening holes of the reinforcing plate with the fastening holes 3 of the webs of the PEC steel components, and then place the splicing plate 5 on the outside of the reinforcing plate, and insert the fastening bolts 50 of the splicing plate 5 into the fastening holes 3 of the reinforcing plate and the webs of the PEC steel components accordingly; Step 4: Install a gear nut 7 on each fastening bolt 50; Step 5: After completing step 4, insert the positioning head 600 of the tightening assembly 6 into the positioning hole 8 on the web of the PEC steel member, and then press the movable sleeve 602 of the tightening assembly 6 to make the driving gear 603 mesh with each gear nut 7; Step 6: Insert the driving end of the electric screwdriver into the groove 605 of the movable sleeve 602, start the electric screwdriver to drive the driving gear 603 to rotate, and the driving gear 603 simultaneously drives each gear nut 7 to rotate to the locking position.

[0023] This embodiment integrates the functions of the aforementioned components to form an overall assembly process. By effectively utilizing the cooperation of the reinforcement plate, the splicing plate 5, the connection component 4 and the tightening component 6 during the assembly process, the H-beam 1 can be assembled quickly and efficiently during construction, significantly improving construction efficiency and reducing labor costs and operational complexity. In addition, through the modular design of each component, the adaptability and flexibility of the device are further enhanced to cope with different construction environments and requirements.

[0024] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An assembly device for PEC steel components, characterized in that: It includes PEC steel components, connection components, splicing plates, reinforcement plates, tightening components, gear nuts and electric screwdrivers. The PEC steel components include H-shaped steel and concrete on both sides of the H-shaped steel web. Multiple through fastening holes are respectively opened at both ends of the H-shaped steel web, and the fastening holes are arranged in a circular ring structure at intervals. A positioning hole is provided on the web of the H-shaped steel at the center of the circular ring structure, and through holes are symmetrically provided at the ends of the upper and lower flanges of the H-shaped steel; one side of the splicing plate is perpendicular to the splicing plate and is provided with multiple fastening bolts, which are threaded rods and are arranged in a circular ring structure at intervals; multiple fastening holes are also opened on the reinforcement plate, and the fastening holes on the reinforcement plate are opposite to the fastening holes on the H-shaped steel web. The outer circumference of the gear nut forms a tooth portion, and an internal thread is arranged on the inner hole wall of the gear nut; the tightening assembly comprises a connected positioning head and a fixing bolt, a spring and a movable sleeve are sleeved on the fixing bolt, the spring is located between the positioning head and the movable sleeve, the movable sleeve can slide axially along the fixing bolt, a driving gear is arranged on the outer circumference of the movable sleeve, a groove for inserting an electric screwdriver is arranged on the outer end surface of the movable sleeve, and the electric screwdriver is inserted into the groove to drive the driving gear to rotate, the positioning head is used to be inserted into the positioning hole on the web of the H-shaped steel, so that the driving gear is meshed with each gear nut sleeved on the fastening bolt at the same time; a movable ring for lifting is provided on the connecting assembly, and the connecting assembly is used to be fixed to the end of the H-shaped steel.

2. The assembly device for a PEC steel member according to claim 1, characterized in that: The cross-section of the connecting assembly is a U-shaped structure, and the connecting assembly includes upper and lower clamping blocks arranged opposite to each other and a connecting plate connecting the upper and lower clamping blocks. Bolt holes are symmetrically provided on the upper clamping block and the lower clamping block. A threaded connecting rod is inserted into the bolt hole of the upper clamping block, and a connecting sleeve with an internal thread is inserted into the bolt hole of the lower clamping block. The connecting rod is used to be plugged into the connecting sleeve. A pull ear is provided on the top surface of the upper clamping block, and a movable ring is provided on the pull ear.

3. The assembly device for a PEC steel member according to claim 2, characterized in that: The connecting plate is provided with an escape opening through which the splicing plate can pass.

4. The assembly device for a PEC steel member according to claim 1, characterized in that: The positioning head and the fixing bolt in the tightening assembly are both cylindrical, the diameter of the positioning head is larger than the diameter of the fixing bolt, one end of the spring is fixed on the movable sleeve, and the other end of the spring is clamped at the connection between the positioning head and the fixing bolt.

5. A method for assembling PEC steel components using an assembling device as described in any one of claims 1 to 4, characterized in that: The steps include: Step 1: Fix a connection component on each end of the PEC steel member; Step 2: Fix the lifting end of the lifting equipment to the connection assembly and lift the PEC steel structure to the installation location; Step 3: Fit the reinforcing plate to the webs of the connecting ends of the two PEC steel components assembled to each other, align the fastening holes of the reinforcing plate with the fastening holes of the webs of the PEC steel components, and then place the splicing plate on the outside of the reinforcing plate, so that the fastening bolts of the splicing plate are correspondingly inserted into the fastening holes of the reinforcing plate and the webs of the PEC steel components; Step 4: Install a gear nut on each fastening bolt; Step 5: After completing step 4, insert the locating head of the tightening assembly into the locating hole on the web of the PEC steel member, and then press the movable sleeve of the tightening assembly to make the driving gear mesh with each gear nut; Step 6: Insert the driving end of the electric screwdriver into the groove of the movable sleeve, start the electric screwdriver to drive the driving gear to rotate, and the driving gear will simultaneously drive each gear nut to rotate to the locking position.

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