CN117071944A - A column-free temporary support device for factory buildings - Google Patents

Abstract

The application relates to the technical field of constructional engineering, and particularly discloses a temporary stand column-free supporting device for a factory building, which comprises a supporting frame and a pair of electric hydraulic push rods; the support frame is arranged between two steel beams below the floor support plate to be supported; the pair of electric hydraulic push rods are respectively arranged on two steel beams below the floor support plate to be supported, the output ends of the pair of electric hydraulic push rods are respectively detachably connected with the bottom surfaces of the two ends of the support frame, and the expansion and contraction directions of the electric hydraulic push rods are consistent with the direction of the floor support plate to be supported; the top surface of the support frame is provided with a pair of jacks; the lifting direction of the pair of jacks is consistent with the direction of the floor support plate to be supported; install temporary support device on the girder steel of building carrier plate bottom, realize the temporary support to the building carrier plate through the cooperation work of electronic hydraulic push rod, support frame and jack, reduce the trouble that adopts vertical scaffold to carry out temporary support, improve work efficiency.

Description

A column-free temporary support device for factory buildings

Technical field

The invention relates to the technical field of construction engineering, and in particular to a column-free temporary support device for factory buildings.

Background technique

With the rapid development of steel structure buildings, engineering construction has put forward higher requirements for the construction period. The factory production of steel structure components meets the project needs. At the same time, ordinary concrete floor slabs are gradually replaced by steel truss floor decks. During the floor construction process of steel frame structure factory buildings, the steel truss floor deck can be installed directly on the steel beams. Concrete can be poured only after binding and welding. Compared with traditional cast-in-situ concrete floor slabs, it has the advantages of fast construction and Cost saving and other advantages.

In the existing technology, during the construction process of steel truss floor decks, due to the large span of some floor decks, temporary support devices are installed to ensure the safety of pouring. At present, vertical scaffolding is mostly used at construction sites for temporary support, but the scaffolding The erection requires waiting for the initial setting of the lower concrete, which makes it impossible to construct multiple layers at the same time. The erection cycle is long and the erection and dismantling process is cumbersome.

Contents of the invention

This application provides a column-free temporary support device for factory buildings, which reduces the trouble of using vertical scaffolding for temporary support, facilitates multi-layer construction at the same time, and improves work efficiency.

This application provides a column-free temporary support device for factory buildings, which adopts the following technical solution:

A column-free temporary support device for factory buildings, including a support frame and a pair of electro-hydraulic push rods; the support frame is installed between two steel beams below the floor deck that needs to be supported; the pair of electro-hydraulic push rods are respectively Installed on two steel beams under the floor deck that needs to be supported, the output ends of a pair of electro-hydraulic push rods are detachably connected to the bottom surfaces of both ends of the support frame. The telescopic direction of the electro-hydraulic push rods is consistent with the direction of the floor deck that needs to be supported. Consistent; a pair of jacks is provided on the top surface of the support frame; the lifting direction of the pair of jacks is consistent with the direction in which the floor deck needs to be supported.

By adopting the above technical solution, the support frame connected to the electro-hydraulic push rod is installed between the two steel beams. When temporarily supporting the floor deck, the electro-hydraulic push rod is started to drive the support frame to move upward and the jack is adjusted. The telescopic height realizes the temporary support of the floor deck. Through the cooperation of the electro-hydraulic push rod, support frame and jack, the temporary support of the floor deck can be easily realized. The connection method of the device is simple, convenient and easy to disassemble, reducing the need for scaffolding. Eliminates the hassle of bracing and improves construction efficiency.

Preferably, the support frame includes a connecting plate and a pair of support beams; jack holes are provided on both end surfaces of the connecting plate close to the electro-hydraulic push rod; one end of the pair of support beams is slidingly connected to the inside of the two jack holes. On the wall, the ends of the two support beams away from the connecting plate extend out of the connecting plate; a pair of the electro-hydraulic push rod output ends are detachably connected to the bottom surfaces of the ends of the two supporting beams extending out of the connecting plate; a pair of the The jacks are respectively arranged on the top surfaces of a pair of support beams; a pushing mechanism is provided in the connecting plate to drive the pair of support beams to move toward or away from each other.

By adopting the above technical solution, the pushing mechanism can drive a pair of support beams to move towards or away from each other, thereby realizing the distance between the two support beams extending out of the connecting plate, thereby realizing the adjustment of the horizontal length of the support frame, so that the support frame can be used in different applications. Temporary support for span floor decking, thereby expanding the scope of application of the device.

Preferably, the connecting plate is provided with a cavity located between two jack holes; the pushing mechanism includes a screw rod and a rotating shaft; the screw rod is rotationally connected to the inner wall of the cavity, and the two ends of the screw rod are respectively Extending into the two jacks; a pair of the support beams are respectively sleeved on both ends of the screw rod, and the support beams are threaded and matched with the screw rod; the threads on the screw rod that match the two support beams are arranged in symmetrical threads; so The rotating shaft is rotatably connected to the inner wall of the top of the cavity, and a first bevel gear is fixed to the bottom end of the rotating shaft; a second bevel gear meshing with the first bevel gear is fixed to the outer wall of the screw rod; the rotating shaft The top end of the shaft extends to the top of the connecting plate, and a handwheel is fixedly connected to the top end of the rotating shaft; the handwheel is provided with a fixing piece that can prevent the rotation of the rotating shaft.

By adopting the above technical solution, when the length of the support frame needs to be adjusted, the rotating shaft and the first bevel gear are driven to rotate by turning the handwheel. With the meshing cooperation of the first bevel gear and the second bevel gear, the rotating shaft drives the screw rod to rotate. During the rotation of the rod, the two support beams are driven to move toward or away from each other, changing the length of the two support beams extending out of the connecting plate, thereby adjusting the overall length of the support frame, and then locking the rotation axis through the fixing piece to adjust the length of the support frame. constant.

Preferably, the top surface of the handwheel is provided with a threaded through hole; the fixing member includes a threaded insertion rod; the threaded insertion rod is threadedly connected to the inner wall of the threaded through hole; and the top surface of the connecting plate corresponds to the threaded through hole. A concave hole is provided at the position; the threaded insertion rod can extend into the concave hole through the threaded through hole.

By adopting the above technical solution, when the rotating shaft needs to be locked, the threaded inserting rod is rotated so that the threaded inserting rod gradually moves down and is inserted into the concave hole to lock the rotating shaft; when the length of the support frame needs to be adjusted, the threaded inserting rod is rotated in the reverse direction. The rod causes the threaded insertion rod to gradually move upward and protrude from the concave hole, thereby making it easier for the staff to rotate the handwheel to adjust the length of the support frame.

Preferably, a pair of support beams are provided with chute on the top surface; a pair of slide blocks are slidably connected to the inner walls of the pair of chute; a pair of jacks are respectively installed on the top surface of a pair of slide blocks; Locking parts for fixing the slider are provided in the chute.

By adopting the above technical solution, the moving slider drives the jack to move in the horizontal direction, so that the position of the jack's support point on the floor deck can be changed according to needs. When the slider moves to the designated position, the locking piece is used to lock the slider. Locking is performed to keep the slider stable and difficult to move.

Preferably, a relief hole is provided on the slider; the locking member includes a threaded rod and a pair of locking nuts; the threaded rod is fixed on the inner wall of the chute, and the threaded rod is provided through the slider along the sliding direction. Through the through relief hole; the slider can slide along the axis direction of the threaded rod; a pair of locking nuts are sleeved on the outside of the threaded rod to match the threaded rod thread, and a pair of locking nuts are located on two sides of the slider away from each other. side.

By adopting the above technical solution, when the slide block moves to a designated position along the axis of the threaded rod in the slide groove, the lock nuts located on both sides of the slide block are rotated, causing the two lock nuts to be in close contact with both sides of the slide block. The block is clamped so that the slider is not easy to slide in the horizontal direction and remains stable.

Preferably, the chute is in a dovetail shape; and the slider is in a dovetail shape that matches the inner wall of the chute.

By adopting the above technical solution, the slider and the chute are arranged in a matching dovetail shape so that the slider is less likely to be displaced in the vertical direction and reduces the possibility of the slider tilting.

Preferably, the top surface of the jack is provided with a backing plate.

By adopting the above technical solution, the setting of the backing plate can increase the contact area between the jack and the floor deck, reduce the possibility of pressure concentration, and help the jack to better support the floor deck.

Preferably, the output end of the electro-hydraulic push rod is fixedly connected with a first fixing plate; the first fixing plate is provided with a first bolt for detachable connection between the first fixing plate and the support beam.

By adopting the above technical solution, the first bolt member provided on the first fixing plate can conveniently realize the connection between the electro-hydraulic push rod and the support beam, and the connection method is simple, convenient and easy to disassemble.

Preferably, the bottom of the electro-hydraulic push rod is fixed with a second fixing plate; the second fixing plate is provided with a second bolt member that can realize the detachable connection between the second fixing plate and the steel beam.

By adopting the above technical solution, the second bolt member provided on the second fixing plate can easily realize the installation of the electro-hydraulic push rod on the steel beam, and the installation method is simple, convenient and easy to disassemble.

To sum up, this application has the following beneficial effects:

1. By installing electro-hydraulic push rods on the two steel beams at the bottom of the floor deck, and connecting both ends of the support frame to the output ends of the electro-hydraulic push rods on the two steel beams, the support frame can be installed on the steel beams at the bottom of the floor deck. When installing on the beam, when temporarily supporting the floor deck, drive the electro-hydraulic push rod to drive the support frame to move upward and adjust the telescopic height of the jack to achieve temporary support of the floor deck. Through the electro-hydraulic push rod, support frame and jack The coordinated work can easily realize the temporary support of the floor decking, reduce the trouble of using scaffolding to support the floor decking, and improve the construction efficiency;

2. Before installing the support frame, turn the handwheel to drive the rotating shaft and the first bevel gear to rotate. With the meshing cooperation of the first bevel gear and the second bevel gear, the rotating shaft drives the screw rod to rotate, thereby driving the connecting rod to rotate. The two support beams at both ends of the board move toward or away from each other to adjust the length of the support frame, and lock the length of the support frame through fixings so that the support frame can be installed on the steel beams at the bottom of floor decks of different spans. Temporary support, expanding the scope of application of temporary support devices;

3. Drive the jack to move in the horizontal direction by moving the slider. After the slider moves to the designated position, rotate the locking nuts on both sides of the slider so that the two locking nuts are close to the side walls of the slider. Clamp so that the slider remains stable in the horizontal direction and is not easy to slide, so that the position of the support point where the jack set on the top supports the floor deck can be adjusted as needed.

Description of the drawings

Figure 1 is a schematic structural diagram of a column-free temporary support device for factory buildings;

Figure 2 is a schematic diagram of the matching structure of the connecting plate, support beam and electro-hydraulic push rod in this application;

Figure 3 is a schematic diagram of the matching structure of the connecting plate, support beam and pushing mechanism in this application;

Figure 4 is an enlarged view of point A in Figure 3;

Figure 5 is a schematic diagram of the matching structure of the jack, slider and locking piece in this application;

Figure 6 is a schematic diagram of the matching structure of the support beam and the electro-hydraulic push rod in this application.

Explanation of reference signs: 1. Support frame; 11. Connecting plate; 111. Jack; 112. Cavity; 113. Recessed hole; 12. Support beam; 121. Slide groove; 13. Slider; 131. Allowance hole ; 14. Locking piece; 141. Threaded rod; 142. Locking nut; 2. Electro-hydraulic push rod; 21. First fixing plate; 211. First bolt; 22. Second fixing plate; 221. Second Bolts; 3. Jack; 31. Backing plate; 4. Pushing mechanism; 41. Screw; 42. Rotating shaft; 43. First bevel gear; 44. Second bevel gear; 45. Hand wheel; 451. Threaded passage Hole; 46, fixing piece; 461, threaded rod.

Detailed ways

The present invention will be further described in detail below with reference to the accompanying drawings. Identical components are designated with the same reference numerals. It should be noted that the words "front", "back", "left", "right", "upper", "lower", "bottom" and "top" used in the following description refer to those in the accompanying drawings. Direction, the words "inside" and "outside" refer to the direction toward or away from the geometric center of a particular component, respectively.

The invention discloses a column-free temporary support device for factory buildings. As shown in Figures 1 and 2, it includes a plurality of support frames 1 installed between two steel beams below the floor deck that needs to be supported. The plurality of support frames 1 Arranged at even intervals; the bottom surfaces of both ends of each support frame 1 are detachably connected to electro-hydraulic push rods 2, and the two electro-hydraulic push rods 2 on the bottom surfaces of both ends of each support frame 1 are detachably connected to two steel beams; The telescopic direction of the electro-hydraulic push rod 2 is consistent with the direction in which the floor deck needs to be supported; a pair of jacks 3 are provided on the top surface of each support frame 1, the jacks 3 are scissor jacks 3, and the lifting direction of the jacks 3 is consistent with the direction of the floor deck. The plates need to be supported in the same direction, and a backing plate 31 is fixed on the top surface of each jack 3.

When temporary support is needed for the floor deck, the electro-hydraulic push rod 2 is installed on the steel beam at the bottom of the floor deck, and then the two ends of the support frame 1 are connected to the electro-hydraulic push rod 2 on the steel beam to achieve support. To install the frame 1 on the steel beam, start the electro-hydraulic push rod 2 to drive the support frame 1 to move up and adjust the telescopic height of the jack 3 to temporarily support the floor deck. Through the electro-hydraulic push rod 2, the support frame 1 and the jack 3 The coordinated work can easily realize the temporary support of the floor decking. The connection method of the temporary support device is simple, convenient and easy to disassemble, which reduces the trouble of using scaffolding for support and improves the construction efficiency. The setting of the pad 31 increases the number of jacks 3 The area of the contact part with the floor deck reduces the possibility of pressure concentration and helps the jack 3 to better support the floor deck.

As shown in Figures 2 and 3, the support frame 1 includes a connecting plate 11, two support beams 12 and a pushing mechanism 4. Both ends of the connecting plate 11 are provided with jacks 111 along the length direction of the connecting plate 11; two supports One end of the beam 12 is slidingly connected to the inner wall of the two jacks 111 respectively. The ends of the two support beams 12 away from the connecting plate 11 both extend to the outside of the connecting plate 11. The bottom surfaces of the ends of the two supporting beams 12 extend to the outside of the connecting plate 11 respectively. It is detachably connected to the output end of the electro-hydraulic push rod 2 located on the two steel beams, and a pair of jacks 3 are respectively arranged on the top surfaces of the two support beams 12; the pushing mechanism 4 is arranged on the connecting plate 11, and the pushing mechanism 4 can drive the two supports The beams 12 move toward or away from each other to adjust the length of the support frame 1 .

Before the installation of the support frame 1, the length of the support frame 1 is adjusted according to the span of the on-site floor deck, and the two support beams 12 located at both ends of the connecting plate 11 are driven by the pushing mechanism 4 to move toward or away from each other to realize the support frame. The adjustment of the length of 1 enables the support frame 1 to be installed on the steel beam at the bottom of the floor deck of different spans, so that the jack 3 on the support frame 1 can temporarily support the floor decks of different spans.

As shown in Figures 3 and 4, the connecting plate 11 is provided with a cavity 112 between the two insertion holes 111; the pushing mechanism 4 includes a screw rod 41, a rotating shaft 42, a first bevel gear 43, and a second bevel gear 44. And the fixing part 46, the screw rod 41 is rotatably connected to the inner wall of the cavity 112, the ends of the screw rod 41 close to the two support beams 12 respectively extend into the two sockets 111; the two support beams 12 respectively extend into the two sockets 111 The ends of the screw rod 41 are respectively sleeved on the outside of both ends of the screw rod 41. The screw rod 41 is threaded and matched with the two support beams 12. The threads on the screw rod 41 that match the two support beams 12 are arranged in a symmetrical thread;

The rotating shaft 42 is rotatably connected to the inner wall of the top of the cavity 112. The top of the rotating shaft 42 extends to the top surface of the connecting plate 11. The top of the rotating shaft 42 is coaxially fixed with a handwheel 45 located on the top of the connecting plate 11; the first bevel gear 43 The second bevel gear 44 is coaxially fixed to the bottom end of the rotating shaft 42, and the second bevel gear 44 is coaxially fixed to the outer wall of the screw rod 41 located in the cavity 112. The second bevel gear 44 meshes with the first bevel gear 43; the fixing member 46 Disposed on the handwheel 45, the fixing member 46 can prevent the rotation shaft 42 from rotating.

When the length of the support frame 1 needs to be adjusted, the rotating shaft 42 and the first bevel gear 43 are driven to rotate by turning the handwheel 45. With the meshing cooperation of the first bevel gear 43 and the second bevel gear 44, the rotating shaft 42 drives the wire. The rod 41 rotates, and the screw rod 41 drives the two support beams 12 located at both ends of the connecting plate 11 to move toward or away from each other along the axis of the screw rod 41 during the rotation process, so that the length of the support frame 1 can be adjusted as needed to adapt to the situation. For the temporary support work of floor bearing slabs with different spans, after the length adjustment of the support frame 1 is completed, the rotating shaft 42 is locked by the fixing member 46, so that the length of the support frame 1 remains stable and is not easily changed.

As shown in Figures 3 and 4, the top surface of the handwheel 45 is provided with a threaded through hole 451. The fixing member 46 includes a threaded insertion rod 461 threadedly connected to the inner wall of the threaded through hole 451. The top surface of the connecting plate 11 corresponds to the threaded through hole 451. A recessed hole 113 is provided at the position of the hole 451. The threaded insertion rod 461 can pass through the threaded through hole 451 and be inserted into the recessed hole 113. The threaded insertion rod 461 is slidably matched with the inner wall of the recessed hole 113.

When adjusting the length of the support frame 1, rotate the threaded insertion rod 461 so that the threaded insertion rod 461 is located outside the concave hole 113, and then the staff can turn the handwheel 45 to adjust the length of the support frame 1; when the length adjustment of the support frame 1 is completed , rotate the threaded insertion rod 461 so that the threaded insertion rod 461 gradually moves down and is inserted into the recessed hole 113, and the hand wheel 45 is fixed so that the rotating shaft 42 is locked and difficult to rotate, making it difficult for the support frame 1 to maintain a stable length after completing the length adjustment. changes happened.

As shown in Figures 2 and 5, the top surfaces of the two support beams 12 are provided with chute 121 along the length direction of the support beam 12. The chute 121 is in the shape of a dovetail, and the inner walls of the two chute 121 are slidingly connected with the chute. The inside of the groove 121 is equipped with a dovetail-shaped slide block 13, and the two jacks 3 are detachably connected to the top surfaces of the two slide blocks 13; each slide groove 121 is provided with a locking piece 14; the slide block 13 is provided with a locking member 14 along its There is a relief hole 131 in the sliding direction. The locking member 14 includes a threaded rod 141 and a pair of locking nuts 142. The threaded rod 141 is arranged along the sliding direction of the slider 13 and passes through the relief hole 131. Both ends of the threaded rod 141 are connected to The inner wall of the chute 121 is fixed, and the slider 13 can slide along the axis direction of the threaded rod 141. A pair of locking nuts 142 are set on the outside of the threaded rod 141 to cooperate with the threaded rod 141. A pair of locking nuts 142 are respectively located on the slider. A pair of locking nuts 142 can clamp the slider 13 on two sides of the block 13 that are away from each other along its sliding direction.

The position of the jack 3 is adjusted by pushing the slider 13 to slide in the chute 121, so that the position of the support point of the jack 3 on the floor deck can be adjusted as needed. When the slider 13 moves to the designated position, the position of the jack 3 is rotated to the designated position. The locking nuts 142 on both sides urge the two locking nuts 142 to be in close contact with the two side walls of the slider 13 to clamp the slider 13 so that the slider 13 is not easy to slide in the horizontal direction and remains stable, thereby making it easier for the slider 13 The jack 3 installed on the top can better temporarily support floor decks of different spans.

As shown in Figures 1 and 6, the output end of each electro-hydraulic push rod 2 is fixed with a first fixed plate 21, and the bottom of each electro-hydraulic push rod 2 is fixed with a second fixed plate 22. The first fixed plate 21 is provided with a plurality of first bolts 211 that can realize the detachable connection between the first fixed plate 21 and the support beam 12, and the second fixed plate 22 is provided with a plurality of first bolts 211 that can realize the detachable connection between the second fixed plate 22 and the steel beam. The second bolt member 221.

The first bolt part 211 on the first fixed plate 21 can conveniently realize the detachable connection between the electro-hydraulic push rod 2 and the support beam 12. The second bolt part 221 on the second fixed plate 22 can conveniently realize the detachable connection between the electro-hydraulic push rod 2 and the support beam 12. The detachable connection between steel beams can facilitate the detachable connection of the support device on the steel beam, making it easy to remove the temporary support device from the steel beam after the construction is completed.

Working principle: When performing temporary support of the floor deck, adjust the length of the support frame 1 according to the span of the floor deck on site. Turn the handwheel 45 to drive the rotating shaft 42 and the first bevel gear 43 to rotate. When the first bevel gear 43 and Under the meshing cooperation of the second bevel gear 44, the rotating shaft 42 drives the screw rod 41 to rotate. During the rotation of the screw rod 41, the two support beams 12 are driven toward or away from each other along the axis of the screw rod 41, thereby adjusting the length of the support frame 1. , after the length adjustment of the support frame 1 is completed, the threaded insertion rod 461 on the handwheel 45 is rotated, causing the threaded insertion rod 461 to gradually move downward and insert into the concave hole 113 to lock the rotation shaft 42, so that the length of the support frame 1 remains fixed;

The electro-hydraulic push rod 2 is installed on the steel beam through the second fixing plate 22 and the second bolt part 221 on the second fixing plate 22, and then the first fixing plate 21 and the first bolt part 211 are used to realize the electric movement of the support frame 1. Install the hydraulic push rod 2 to install the support frame 1 on the steel beam. When temporarily supporting the floor deck, start the electric hydraulic push rod 2 to drive the support frame 1 to move upward, and adjust the telescopic height of the jack 3 To achieve temporary support for the floor deck, the temporary support of the floor deck can be easily achieved with the cooperation of the electro-hydraulic push rod 2, support frame 1 and jack 3;

The support point of the jack 3 supporting the floor deck can be adjusted as needed. When the support point position of the jack 3 needs to be adjusted, the jack 3 can be driven to move in the horizontal direction by moving the slider 13. After the slider 13 Move to the designated position and rotate the locking nuts 142 on both sides of the slider 13 so that the two locknuts 142 are close to the side walls of the slider 13 to clamp the slider 13 so that the slider 13 is not easy to slide in the horizontal direction. Stable, the pad 31 provided on the top surface of the jack 3 increases the contact area between the jack 3 and the floor deck, reduces the possibility of pressure concentration, and helps the jack 3 better support the floor deck.

The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application shall be covered by the scope of protection of the present application. Inside.

Claims (10)

1. The utility model provides a temporary strutting arrangement of stand is exempted from for factory building which characterized in that: comprises a supporting frame (1) and a pair of electro-hydraulic push rods (2); the support frame (1) is arranged between two steel beams below the floor support plate to be supported; the pair of electric hydraulic push rods (2) are respectively arranged on two steel beams below the floor support plate to be supported, the output ends of the pair of electric hydraulic push rods (2) are respectively detachably connected with the bottom surfaces of the two ends of the support frame (1), and the expansion and contraction directions of the electric hydraulic push rods (2) are consistent with the direction of the floor support plate to be supported; the top surface of the supporting frame (1) is provided with a pair of jacks (3); the lifting direction of the pair of jacks (3) is consistent with the direction of the floor support plate to be supported.

2. The temporary stand-free support device for a factory building according to claim 1, wherein: the support frame (1) comprises a connecting plate (11) and a pair of support beams (12); the two end surfaces of the connecting plate (11) close to the electric hydraulic push rod (2) are provided with jacks (111); one end of each pair of supporting beams (12) is respectively connected to the inner side walls of the two jacks (111) in a sliding manner, and the end parts of the two supporting beams (12) far away from the connecting plate (11) extend out of the connecting plate (11); the output ends of the pair of electric hydraulic push rods (2) are detachably connected with the bottom surfaces of the end parts of the two support beams (12) extending out of the connecting plate (11) respectively; the jacks (3) are respectively arranged on the top surfaces of the pair of supporting beams (12); a pushing mechanism (4) capable of driving a pair of supporting beams (12) to move towards or away from each other is arranged in the connecting plate (11).

3. The temporary stand-free support device for a factory building according to claim 2, wherein: a cavity (112) positioned between the two jacks (111) is arranged in the connecting plate (11); the pushing mechanism (4) comprises a screw rod (41) and a rotating shaft (42); the screw rod (41) is rotatably connected to the inner side wall of the cavity (112), and two ends of the screw rod (41) extend into the two insertion holes (111) respectively; the pair of support beams (12) are respectively sleeved at two ends of the screw rod (41), and the support beams (12) are in threaded transmission fit with the screw rod (41); threads matched with the two supporting beams (12) on the screw rod (41) are symmetrically arranged; the rotating shaft (42) is rotatably connected to the inner side wall at the top end of the cavity (112), and a first bevel gear (43) is fixedly connected to the bottom end of the rotating shaft (42); a second bevel gear (44) meshed with the first bevel gear (43) is fixedly connected to the outer side wall of the screw rod (41); the top end of the rotating shaft (42) extends to the top of the connecting plate (11), and a hand wheel (45) is fixedly connected to the top end of the rotating shaft (42); the hand wheel (45) is provided with a fixing piece (46) which can prevent the rotation shaft (42) from rotating.

4. A temporary support device for a building free of columns according to claim 3, wherein: a threaded through hole (451) is formed in the top surface of the hand wheel (45); the fixing piece (46) comprises a threaded inserted rod (461); the threaded inserted rod (461) is connected to the inner side wall of the threaded through hole (451) in a threaded manner; concave holes (113) are formed in the top surface of the connecting plate (11) at positions corresponding to the threaded through holes (451); the threaded insert (461) can extend into the concave hole (113) through the threaded through hole (451).

5. The temporary stand-free support device for a factory building according to claim 1, wherein: the top surfaces of the pair of supporting beams (12) are provided with sliding grooves (121); the inner side walls of the pair of sliding grooves (121) are respectively and slidably connected with a sliding block (13); the pair of jacks (3) are respectively arranged on the top surfaces of the pair of sliding blocks (13); locking pieces (14) for fixing the sliding blocks (13) are arranged in the sliding grooves (121).

6. The temporary stand-free support device for a factory building of claim 5, wherein: a yielding hole (131) is formed in the sliding block (13); the locking piece (14) comprises a threaded rod (141) and a pair of locking nuts (142); the threaded rod (141) is fixedly connected to the inner side wall of the sliding groove (121), and the threaded rod (141) penetrates through the abdication hole (131) along the sliding direction of the sliding block (13); the sliding block (13) can slide along the axial direction of the threaded rod (141); the pair of locking nuts (142) are sleeved outside the threaded rod (141) and are in threaded fit with the threaded rod (141), and the pair of locking threads (142) are respectively located at two sides of the sliding block (13) which are far away from each other.

7. The temporary stand-free support device for a factory building of claim 5, wherein: the sliding groove (121) is dovetail-shaped; the sliding block (13) is in a dovetail shape matched with the inner wall of the sliding groove (121).

8. The temporary stand-free support device for a factory building according to claim 1, wherein: and the top surfaces of the jacks (3) are respectively provided with a base plate (31).

9. The temporary stand-free support device for a factory building according to claim 1, wherein: the output end of the electric hydraulic push rod (2) is fixedly connected with a first fixing plate (21); the first fixing plate (21) is provided with a first bolt piece (211) for realizing detachable connection of the first fixing plate (21) and the supporting beam (12).

10. The temporary stand-free support device for a factory building according to claim 1, wherein: the bottom of the electric hydraulic push rod (2) is fixedly connected with a second fixing plate (22); and a second bolt piece (221) capable of realizing detachable connection of the second fixing plate (22) and the steel beam is arranged on the second fixing plate (22).