Fabricated precast beam

Abstract

The invention relates to the field of building materials, in particular to a fabricated precast beam. The device comprises a main beam, an auxiliary beam, a telescopic adjusting mechanism and a supporting mechanism, the main beam is provided with a transversely-through sliding way. The secondary beams are slidably arranged at the slideways and are symmetrically arranged in the transverse direction relative to the main beam; the telescopic adjusting mechanism is arranged on the main beam and used for adjusting the two sets of auxiliary beams to move towards each other or away from each other. The two supporting mechanisms are symmetrically arranged in the transverse direction relative to the main beam and comprise two supporting assemblies distributed side by side in the width direction of the main beam, each supporting assembly comprises a connecting frame arranged at the bottom of the main beam, a hinge seat arranged at the bottom of the auxiliary beam and a supporting frame hinged to the hinge seat, and the end, away from the hinge seat, of each supporting frame is provided with a support part; the support part is provided with a plurality of first through holes, and the connecting frame is provided with a plurality of first threaded holes. The length of a single precast beam can be adjusted, adjustment is flexible, the precast beam can be connected with a vertical beam by unfolding the supporting mechanism, and the connection firmness is improved.

Description

Technical Field

[0001] The invention relates to the field of building materials, in particular to an assembled prefabricated beam. Background Art

[0002] Prefabricated beams are one of the indispensable components in prefabricated buildings. They are prefabricated in factories, maintained and transported to the site for installation and construction after passing the acceptance inspection. They are easy to construct, have a fast project progress, have little impact on the surrounding environment, and the quality of building components can be easily guaranteed.

[0003] Chinese patent announcement number CN213741572U discloses an assembled building prefabricated beam, including a prefabricated beam body, a connecting boss is provided on the left side of the prefabricated beam body, a connecting slot is provided on the right side of the prefabricated beam body, a plurality of threaded sleeves are inlaid on both the front and rear sides of the connecting boss, a plurality of countersunk holes are provided on the front and rear sides of the prefabricated beam body near the right side, a locking screw is connected in the countersunk hole, the locking screw is threadedly connected in the threaded sleeve on the adjacent prefabricated beam body, and a plurality of first plug-in holes are provided on the front side of the connecting boss. The assembled building prefabricated beam sets the prefabricated beam into sections of the prefabricated beam body. When in use, the appropriate number of prefabricated beam bodies can be selected according to the use requirements, and then the prefabricated beam body is connected and locked and fixed by the locking screws after the plug-in limit of the connecting boss and the connecting slot, so as to form a complete prefabricated beam, which has a wide range of applications and is convenient to use.

[0004] However, the above technical solution has the following shortcomings: the length of a single prefabricated beam is fixed and cannot be adjusted according to actual usage requirements, which has certain limitations; and the prefabricated beam is erected on the vertical beam, and its reliability needs to be improved. Summary of the invention

[0005] The purpose of the present invention is to address the problems existing in the background technology and to propose an assembled prefabricated beam, which can adjust the length of a single prefabricated beam flexibly and can also be connected to a vertical beam by unfolding a supporting mechanism to improve the reliability of the connection.

[0006] The technical solution of the present invention is an assembled prefabricated beam, including a main beam, a sub-beam, a telescopic adjustment mechanism and a supporting mechanism; the main beam has a transversely penetrating slide; the sub-beam is slidably arranged at the slide, and two groups are symmetrically arranged in the transverse direction with respect to the main beam; the telescopic adjustment mechanism is arranged on the main beam to adjust the two groups of sub-beams to move toward or away from each other; the supporting mechanism is symmetrically arranged in the transverse direction with respect to the main beam, including two groups of supporting components distributed side by side along the width direction of the main beam, the supporting component includes a connecting frame arranged at the bottom of the main beam, a hinge seat arranged at the bottom of the sub-beam, and a supporting frame hingedly installed on the hinge seat, the supporting frame has a support portion at one end away from the hinge seat, the support portion has a plurality of first through holes, the connecting frame has a plurality of first threaded holes, when the supporting frame rotates until the support portion abuts against the connecting frame, the plurality of first through holes and the plurality of first threaded holes correspond to each other one by one and are coaxially distributed respectively, and a first screw threadedly connected to the first threaded hole is passed through the first through hole.

[0007] Preferably, the connecting frame has a notch for the supporting frame to pass through, and has an end surface for the supporting portion to abut.

[0008] Preferably, a movable channel is provided at the lower part of the sub-beam along the inclined direction, a support tube is movably installed at the movable channel, a connecting plate portion is provided at the bottom end of the support tube, the connecting plate portion has a plurality of second through holes, and a plurality of second threaded holes are provided at the bottom of the sub-beam. The connecting plate portion is adjusted to a vertical state or a horizontal state by rotating the support tube. When the connecting plate portion is in a horizontal state, the support tube can be retracted into the inner side of the movable channel, the plurality of second through holes and the plurality of second threaded holes correspond one to one and are coaxially distributed respectively, and a second screw rod threadedly connected to the second threaded hole is passed through the second through hole.

[0009] Preferably, for two support portions and one connecting plate portion distributed on the same side of the main beam, when the two support portions and one connecting plate portion are adjusted to the same vertical plane position, the two support portions and one connecting plate portion are distributed in a triangular shape, and the height of the connecting plate portion is higher than the height of the support portions.

[0010] Preferably, the telescopic adjustment mechanism includes a bracket arranged on the inner wall of the main beam slide, a bidirectional screw rotatably arranged on the bracket, a rotating shaft rotatably arranged on the main beam, a rotating disk and a first bevel gear respectively connected to the two ends of the rotating shaft, and a second bevel gear arranged on the bidirectional screw. The bidirectional screw is horizontally distributed and has a first threaded portion and a second threaded portion with opposite thread rotation directions. The first threaded portion and the second threaded portion are both threadedly connected with screw nuts. The two screw nuts are respectively connected to the two sub-beams, the first bevel gear and the second bevel gear are meshed and connected, and the rotating shaft is vertically distributed.

[0011] Preferably, there is a groove at the bottom of the main beam, the rotating disk is located in the groove, the rotating disk has an eccentrically distributed operating area, the operating area has a storage groove, a third threaded hole and a movable groove connected in sequence from bottom to top, the third threaded hole is threadedly connected with a bolt, and the top of the bolt is connected to a limiting ring that moves inside the movable groove.

[0012] Preferably, the main beam includes a first tube body, a second tube body located inside the first tube body, and a first concrete layer cast between the first tube body and the second tube body, the sub-beam includes a third tube body, a fourth tube body located inside the third tube body and extending toward the main beam, a fifth tube body located inside the fourth tube body, a second concrete layer cast between the third tube body and the fourth tube body, and a third concrete layer cast between the fourth tube body and the fifth tube body, a closing plate is provided at the outer end of the fifth tube body, and a connecting head connected to the screw nut is provided at the inner end.

[0013] Preferably, a stirrup frame is connected between the first tube body and the second tube body, between the third tube body and the fourth tube body, and between the fourth tube body and the fifth tube body, and the stirrup frame includes a plurality of steel bar rings distributed side by side in the transverse direction, a plurality of steel bars connecting the plurality of steel bar rings, and a plurality of connecting bars evenly distributed around the steel bar rings.

[0014] Compared with the prior art, the present invention has the following beneficial technical effects:

[0015] The present invention can adjust the length of a single prefabricated beam flexibly. In addition, the support mechanism can be unfolded to connect with the vertical beam, thereby improving the stability of the assembly of the entire prefabricated beam and the reliability of the structural connection. When assembly is not required, the support portion can be connected to the connecting frame to reduce the volume of the entire prefabricated beam, making it easier to store and transport. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure after the embodiment of the present invention is extended;

[0017] Figure 2 It is a schematic diagram of the structure of the embodiment of the present invention when it is contracted;

[0018] Figure 3 A partial structural cross-sectional view of an embodiment of the present invention;

[0019] Figure 4 for Figure 3 A magnified view of the structure at center A;

[0020] Figure 5 It is a partial structural cross-sectional view of the first tube body, the second tube body and the stirrup frame;

[0021] Figure 6 Schematic diagram of the distribution of support tubes on the sub-beam.

[0022] : 100, main beam; 200, auxiliary beam; 1, first pipe body; 2, first concrete layer; 3, second pipe body; 4, stirrup frame; 41, steel ring; 42, steel bar; 43, connecting rib; 5, third pipe body; 6, second concrete layer; 7, fourth pipe body; 8, third concrete layer; 9, fifth pipe body; 10, connector; 11, two-way screw; 111, screw nut; 12, bracket; 13, rotating disk; 131, storage slot; 132, movable slot; 14, rotating shaft; 15, first bevel gear; 16, second bevel gear; 17, bolt; 18, limiting ring; 19, connecting frame; 20, supporting frame; 201, support portion; 21, hinged seat; 22, supporting pipe; 221, connecting plate portion; 222, channel; 23, sealing plate. DETAILED DESCRIPTION

[0023] Embodiment 1

[0024] like Figure 1-Figure 6 As shown, an assembled prefabricated beam proposed in this embodiment includes a main beam 100, a secondary beam 200, a telescopic adjustment mechanism and a supporting mechanism.

[0025] The main beam 100 has a slideway that runs through the main beam 100, and the cross section of the slideway is rectangular. The auxiliary beam 200 is slidably arranged at the slideway, and two groups are symmetrically arranged along the horizontal direction with respect to the main beam 100. The two auxiliary beams 200 slide on both sides of the slideway respectively, and can slide to both sides respectively, or slide towards each other.

[0026] like Figure 1 As shown, the telescopic adjustment mechanism is arranged on the main beam 100, and adjusts the two sets of sub-beams 200 to move toward or away from each other, thereby adjusting the spacing between the two sets of sub-beams 200, and further adjusting the length of the entire prefabricated beam. The entire prefabricated beam is respectively erected on two vertical beams through two sub-beams 200 on both sides, and can be adapted to be connected with two vertical beams with different spacings within a certain range.

[0027] Two groups of support mechanisms are symmetrically arranged along the transverse direction of the main beam 100, and each group of support mechanisms includes two groups of support components distributed side by side along the width direction of the main beam 100. The support components include a connecting frame 19 arranged at the bottom of the main beam 100, a hinge seat 21 arranged at the bottom of the sub-beam 200, and a support frame 20 hingedly mounted on the hinge seat 21. The support frame 20 has a support portion 201 at one end away from the hinge seat 21, and the support portion 201 is used to connect with the vertical beam for the sub-beam 200. The support portion 201 has a plurality of first through holes, and the connecting frame 19 has a plurality of first threaded holes. When the support frame 20 rotates until the support portion 201 abuts against the connecting frame 19, the plurality of first through holes and the plurality of first threaded holes correspond to each other and are respectively coaxially distributed, the sub-beam 200 slides inward to the extreme position, the end of the sub-beam 200 abuts against the end of the main beam 100, and the entire prefabricated beam is in the shortest length state. The first through hole is provided with a first screw rod threadedly connected to the first threaded hole, and the support part 201 is connected to the connecting frame 19 through the first screw rod, so that the entire prefabricated beam structure is stable, parts will not get loose, and it is easy to transport. When transporting to the construction site, the first screw rod is loosened from the connecting frame 19, and then the support frame 20 is unfolded outward, the support part 201 is attached to the side of the vertical beam used to set up the secondary beam 200, the first screw rod is passed through the first through hole, and screwed into the vertical beam, the support frame 20 is in an inclined state, and enhanced fixation is achieved, ensuring the stability of the entire prefabricated beam after installation.

[0028] like Figure 1 As shown, the connecting frame 19 has a notch for the support frame 20 to pass through, and has an end face for the support portion 201 to abut. When the support frame 20 is rotated inward, the secondary beam 200 is first slid inward to a position abutting against the end of the main beam 100, and then the support frame 20 is rotated, the support frame 20 passes through the notch, and the support portion 201 is rotated to a position in contact with the end face. At this time, the first through hole is aligned with the first threaded hole, which facilitates the fixing of the support portion 201 by the first bolt.

[0029] Furthermore, a structure is designed to enhance the stability of the connection of the prefabricated beam. Specifically, a movable channel is provided at the lower part of the subbeam 200 along the inclined direction, and a support tube 22 is movably installed at the movable channel. The support tube 22 has a through channel 222 along the length direction, and one end of the inner side of the subbeam 200 has an opening connected to the slideway. When adjusting the position of the subbeam 200, air can flow along the channel 222 to ensure the smoothness of the adjustment process. The bottom end of the support tube 22 has a connecting plate portion 221, and the angle between the axial direction of the support tube 22 and the plane where the connecting plate portion 221 is located is 45°. The connecting plate portion 221 has a plurality of second through holes, and the bottom of the subbeam 200 has a plurality of second threaded holes. The connecting plate portion 221 is adjusted to a vertical state or a horizontal state by rotating the support tube 22. When the connecting plate portion 221 is in a horizontal state, the support tube 22 can be received into the inner side of the movable channel, and the multiple second through holes and the multiple second threaded holes are corresponding to each other and are coaxially distributed. The second through hole is provided with a second screw threadedly connected to the second threaded hole, so that the connecting plate portion 221 is fixed to the sub-beam 200 for easy transportation. When it is necessary to connect the connecting plate portion 221 to the vertical beam, first loosen the second bolt, pull the support tube 22 in an inclined downward direction, rotate the support tube 22 180°, and the connecting plate portion 221 is synchronously rotated to a vertical state, and the support tube 22 is continuously pulled until the connecting plate portion 221 abuts against the side of the vertical beam. At this time, the connecting plate portion 221 is fixed to the vertical beam by the second bolt. On the basis of the support portion 201 being fixed to the vertical beam, the reliability of the entire prefabricated beam assembly is improved.

[0030] When analyzing the connection position of the support portion 201 and the connecting plate portion 221, for two support portions 201 and one connecting plate portion 221 distributed on the same side of the main beam 100, when the two support portions 201 and one connecting plate portion 221 are adjusted to the same vertical position, the two support portions 201 and one connecting plate portion 221 are distributed in a triangular shape, and the height of the connecting plate portion 221 is higher than the height of the support portion 201. The three connection points distributed in a triangular shape can provide a more stable and reliable connection effect.

[0031] This embodiment can adjust the length of a single prefabricated beam, and the adjustment is flexible. In addition, it can also be connected to the vertical beam by unfolding the support mechanism, specifically by connecting the support part 201 at the end of the support frame 20 to the side of the vertical beam, and improving the stability of the assembly of the entire prefabricated beam and the reliability of the structural connection on the basis of the secondary beam 200 erected on the top of the vertical beam. When assembly is not required, the support part 201 can also be connected to the connecting frame 19 to reduce the volume of the entire prefabricated beam, which is convenient for storage and transportation.

[0032] Embodiment 2

[0033] like Figure 1-Figure 6As shown, an assembled prefabricated beam proposed in this embodiment, compared with embodiment one, in this embodiment, the telescopic adjustment mechanism includes a bracket 12 arranged on the inner wall of the slideway of the main beam 100, a bidirectional screw 11 rotatably arranged on the bracket 12, a rotating shaft 14 rotatably arranged on the main beam 100, a rotating disk 13 and a first bevel gear 15 respectively connected to the two ends of the rotating shaft 14, and a second bevel gear 16 arranged on the bidirectional screw 11, the bidirectional screw 11 is horizontally distributed and has a first threaded portion and a second threaded portion with opposite thread rotation directions, the first threaded portion and the second threaded portion are both threadedly connected with a screw nut 111, the two screw nuts 111 are respectively connected to the two sub-beams 200, the first bevel gear 15 and the second bevel gear 16 are meshed and connected, and the rotating shaft 14 is vertically distributed. The rotating disk 13 is for workers to operate. By rotating the rotating disk 13, the rotating shaft 14 is driven to rotate. The rotating shaft 14 drives the first bevel gear 15 to rotate. The first bevel gear 15 drives the bidirectional screw 11 to rotate through the second bevel gear 16. The bidirectional screw 11 drives the two sub-beams 200 to move toward or away from each other through two screw nuts 111, thereby realizing synchronous adjustment of the spacing.

[0034] In order to improve the convenience of adjusting the length of the entire prefabricated beam, the following design is made: the main beam 100 has a groove at the bottom, the rotating disk 13 is located in the groove, the rotating disk 13 has an eccentrically distributed operating area, the operating area has a receiving groove 131, a third threaded hole and a movable groove 132 connected in sequence from bottom to top, a bolt 17 is threadedly connected at the third threaded hole, and the bottom of the bolt 17 has a hexagonal groove. The top of the bolt 17 is connected to a limit ring 18 that moves inside the movable groove 132. When it is necessary to rotate the rotating disk 13, the bolt 17 is rotated downward, and the bolt 17 drives the limit ring 18 to move downward until the bottom end of the limit ring 18 abuts against the bottom end of the movable groove 132. At this time, the rotating disk 13 is eccentrically dragged by the bolt 17, and the bolt 17 protruding from the bottom of the rotating disk 13 is convenient for workers to pinch and rotate, thereby facilitating the adjustment of the length of the entire prefabricated beam. After the adjustment is completed, the bolt 17 is screwed upward again, and the head of the bolt 17 is stored in the storage groove 131 to ensure that the bottom is flush with the rotating disk 13 to improve the regularity.

[0035] In this embodiment, the spacing between the two sub-beams 200 is adjusted by rotating the rotating disk 13, that is, the length of the entire prefabricated beam is adjusted, which is easy to operate.

[0036] Embodiment 3

[0037] like Figure 1-Figure 6As shown, an assembled prefabricated beam proposed in this embodiment, compared with the first embodiment, in this embodiment, the main beam 100 includes a first tube body 1, a second tube body 3 located inside the first tube body 1, and a first concrete layer 2 cast between the first tube body 1 and the second tube body 3, and the sub-beam 200 includes a third tube body 5, a fourth tube body 7 located inside the third tube body 5 and extending toward the main beam 100, a fifth tube body 9 located inside the fourth tube body 7, a second concrete layer 6 cast between the third tube body 5 and the fourth tube body 7, and a third concrete layer 8 cast between the fourth tube body 7 and the fifth tube body 9, and the outer end of the fifth tube body 9 is provided with a sealing plate 23, and the inner end is provided with a connector 10 connected to the screw nut 111. Each tube body is made of steel, and concrete is cast between adjacent tube bodies. The cross section of each concrete layer is rectangular ring-shaped, and all are concrete columns. The fourth tube body 7 can slide at the slideway inside the second tube body 3, and each tube body can ensure the structural reliability of the entire prefabricated beam.

[0038] In order to further improve the structural reliability of the main beam 100 and the sub-beam 200, a stirrup frame 4 is connected between the first tube body 1 and the second tube body 3, between the third tube body 5 and the fourth tube body 7, and between the fourth tube body 7 and the fifth tube body 9. The stirrup frame 4 includes a plurality of steel rings 41 distributed side by side in the transverse direction, a plurality of steel bars 42 connecting the plurality of steel rings 41, and a plurality of connecting bars 43 evenly distributed around the steel rings 41. That is to say, the two ends of the connecting bar 43 are respectively connected between the inner and outer walls of the two adjacent tube bodies, and then concrete is poured between the two tube bodies. After the concrete solidifies, the steel rings 41, the steel bars 42 and the connecting bars 43 can further make the concrete and the tube body firmly connected and not easy to loosen.

[0039] This embodiment improves the connection reliability between each pipe body and the concrete layer and prolongs the service life by performing detailed design on the main beam 100 and the auxiliary beam 200.

[0040] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto, and various changes can be made within the knowledge scope of technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. An assembled prefabricated beam, characterized in that: include: A main beam (100) having a slideway running transversely therethrough; A secondary beam (200) is slidably arranged on a slideway, and two groups are symmetrically arranged in the transverse direction with respect to the main beam (100); A telescopic adjustment mechanism is arranged on the main beam (100) to adjust the two sets of auxiliary beams (200) to move toward or away from each other; A support mechanism is provided, wherein two groups are symmetrically arranged along the transverse direction with respect to a main beam (100), and include two groups of support components arranged side by side along the width direction of the main beam (100), wherein the support components include a connecting frame (19) arranged at the bottom of the main beam (100), a hinge seat (21) arranged at the bottom of the auxiliary beam (200), and a support frame (20) hingedly mounted on the hinge seat (21), wherein the end of the support frame (20) away from the hinge seat (21) includes a support portion (201), the support portion (201) includes a plurality of first through holes, and the connecting frame (19) includes a plurality of first threaded holes, and when the support frame (20) rotates until the support portion (201) abuts against the connecting frame (19), the plurality of first through holes and the plurality of first threaded holes correspond to each other one by one and are respectively coaxially arranged, and a first screw rod threadedly connected to the first threaded hole is passed through the first through hole.

2. The prefabricated beam according to claim 1, characterized in that: The connecting frame (19) has a notch for the supporting frame (20) to pass through, and has an end surface for the supporting portion (201) to abut against.

3. The prefabricated beam according to claim 1, characterized in that: A movable channel is arranged at the lower part of the auxiliary beam (200) along an inclined direction, a support tube (22) is movably installed at the movable channel, a connecting plate portion (221) is arranged at the bottom end of the support tube (22), the connecting plate portion (221) has a plurality of second through holes, a plurality of second threaded holes are arranged at the bottom of the auxiliary beam (200), the connecting plate portion (221) is adjusted to a vertical state or a horizontal state by rotating the support tube (22), and the support tube (22) can be retracted into the inner side of the movable channel when the connecting plate portion (221) is in a horizontal state, the plurality of second through holes and the plurality of second threaded holes are arranged to correspond to each other one by one and are respectively coaxially distributed, and a second screw rod threadedly connected to the second threaded hole is passed through the second through hole.

4. The prefabricated beam according to claim 3, characterized in that: For two support portions (201) and a connecting plate portion (221) distributed on the same side of the main beam (100), when the two support portions (201) and the connecting plate portion (221) are adjusted to the same vertical plane position, the two support portions (201) and the connecting plate portion (221) are distributed in a triangular shape, and the height of the connecting plate portion (221) is higher than the height of the support portion (201).

5. The prefabricated beam according to claim 1, characterized in that: The telescopic adjustment mechanism comprises a bracket (12) arranged on the inner wall of a slideway of a main beam (100), a bidirectional screw (11) rotatably arranged on the bracket (12), a rotating shaft (14) rotatably arranged on the main beam (100), a rotating disk (13) and a first bevel gear (15) respectively connected to two ends of the rotating shaft (14), and a second bevel gear (16) arranged on the bidirectional screw (11); the bidirectional screw (11) is horizontally distributed and has a first threaded portion and a second threaded portion with opposite thread rotation directions; the first threaded portion and the second threaded portion are both threadedly connected with a screw nut (111); the two screw nuts (111) are respectively connected to two auxiliary beams (200); the first bevel gear (15) is meshedly connected with the second bevel gear (16); and the rotating shaft (14) is vertically distributed.

6. The prefabricated beam according to claim 5, characterized in that: The main beam (100) has a groove at the bottom, the rotating disk (13) is located in the groove, the rotating disk (13) has an eccentrically distributed operating area, the operating area has a receiving groove (131), a third threaded hole and a movable groove (132) which are connected in sequence from bottom to top, a bolt (17) is threadedly connected at the third threaded hole, and a limiting ring (18) movable inside the movable groove (132) is connected to the top end of the bolt (17).

7. The prefabricated beam according to claim 5, characterized in that: The main beam (100) comprises a first tube body (1), a second tube body (3) located inside the first tube body (1), and a first concrete layer (2) cast between the first tube body (1) and the second tube body (3); the sub-beam (200) comprises a third tube body (5), a fourth tube body (7) located inside the third tube body (5) and extending toward the main beam (100), a fifth tube body (9) located inside the fourth tube body (7), a second concrete layer (6) cast between the third tube body (5) and the fourth tube body (7), and a third concrete layer (8) cast between the fourth tube body (7) and the fifth tube body (9); the outer end of the fifth tube body (9) is provided with a sealing plate (23), and the inner end is provided with a connecting head (10) connected to a screw nut (111).

8. The prefabricated beam according to claim 7, characterized in that: A stirrup frame (4) is connected between the first tube body (1) and the second tube body (3), between the third tube body (5) and the fourth tube body (7), and between the fourth tube body (7) and the fifth tube body (9). The stirrup frame (4) comprises a plurality of steel bar circles (41) arranged side by side in a transverse direction, a plurality of steel bar bars (42) connecting the plurality of steel bar circles (41), and a plurality of connecting bars (43) evenly distributed around the steel bar circles (41).

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