CN117602503A - Safe hoist device of prefabricated box culvert - Google Patents

Abstract

The invention relates to the technical field of box culvert hoisting, and provides a prefabricated box culvert safe hoisting device which comprises an inner frame, an outer frame, a shearing fork frame, a supporting structure, a distance adjusting structure and a box culvert limiting structure, wherein the outer frame is arranged above the inner frame, the outer frame is connected with the inner frame through the box culvert limiting structure, the box culvert limiting structure is arranged on the outer frame and used for limiting the box culvert position between the outer frame and the inner frame, the inner frame comprises two hoisting laths, the two hoisting laths are movably connected with the shearing fork frame through the distance adjusting structure, the distance adjusting structure is used for adjusting the distance between the two hoisting laths, and the bottoms of the two hoisting laths are both provided with supporting structures for adjusting the heights of the hoisting laths. The invention solves the problems of uneven stress, deflection, shaking and the like in the box culvert hoisting process, and improves the safety of box culvert hoisting.

Description

Safe hoist device of prefabricated box culvert

Technical Field

The invention relates to the technical field of box culvert hoisting, in particular to a safe hoisting device for a prefabricated box culvert.

Background

The box culvert is a culvert with a body constructed by reinforced concrete box-shaped pipe joints. The box culvert consists of one or more square or rectangular sections, typically made of reinforced concrete or masonry. After the box culvert is manufactured, the box culvert is lifted and installed through a crane. However, the existing crane can simply hoist the box culvert into the tunnel, and the stability of the box culvert is difficult to guarantee in the hoisting process of the crane, and the box culvert is easy to incline, so that the accuracy of the installation of the subsequent box culvert can be influenced on one hand, and on the other hand, the extremely large potential safety hazard is reserved, and the box culvert is easy to collide or fall.

The patent of application number 202010542029.8 discloses an auxiliary hoisting device for bridge construction, which can meet the placing requirements of hoisting objects at different angles, but cannot ensure that the stressed force can be balanced and no deflection occurs during hoisting.

Therefore, to solve the above problems, a safe hoisting device for prefabricated box culverts is provided to solve the above problems.

Disclosure of Invention

Aiming at the defects of the prior art, the invention develops a safe hoisting device for the prefabricated box culvert, solves the problems of uneven stress, deflection, shaking and the like in the hoisting process of the box culvert, and improves the hoisting safety of the box culvert.

The technical scheme for solving the technical problems is as follows: the invention provides a safe hoisting device for a prefabricated box culvert, which comprises an inner frame, an outer frame, a fork shearing frame, a supporting structure, a distance adjusting structure and a box culvert limiting structure, wherein the outer frame is arranged above the inner frame, the outer frame is connected with the inner frame through the box culvert limiting structure, the box culvert limiting structure is arranged on the outer frame and used for limiting the box culvert position between the outer frame and the inner frame, the inner frame comprises two hoisting battens, the two hoisting battens are movably connected with the fork shearing frame through the distance adjusting structure, the distance adjusting structure is used for adjusting the distance between the two hoisting battens, and the bottoms of the two hoisting battens are respectively provided with the supporting structure for adjusting the heights of the hoisting battens.

As the optimization, the outer frame includes the hanging plate, and the installation cavity is offered to the hanging plate inside, and the installation cavity both sides set up the translation slide along hanging slat length direction, and box culvert limit structure includes drive assembly, spool and hoisting rope, all sets up two spools in every translation slide, and the rolling has the hoisting rope on the spool, and the hanging plate is worn out with the end connection of adjacent hanging slat respectively to the one end that the spool was kept away from to four hoisting ropes, and drive assembly sets up on the hanging plate, and drive assembly drive spool removes along the translation slide.

As the optimization, drive assembly sets up four groups, and every group drive assembly all includes adjustment motor, flexible interior screw rod, flexible spiral shell section of thick bamboo and intermeshing's adjustment gear and stabilizing gear, and adjustment motor sets up at the hoist and mount board top, and adjustment motor's output sets up adjustment gear, stabilizing gear and flexible interior screw rod rigid coupling, flexible interior screw rod are located the translation slide, and threaded connection flexible spiral shell section of thick bamboo on the flexible interior screw rod links to each other with the spool tip through the mounting disc on the flexible spiral shell section of thick bamboo.

As the optimization, hoist device still includes drive assembly fixed knot constructs, drive assembly fixed knot constructs including fixed extension board and interior loop bar, fixed extension board sets up at hoist and mount board top, fixed extension board is located the translation slide in the middle of to perpendicular to hoist and mount slat length direction sets up, and fixed extension board tip sets up interior loop bar, and interior loop bar both sides all set up the evagination circle, and the tip that two flexible internal screw rods that are located same translation slide are close to each other all offer with evagination circle normal running fit's anticreep groove, and interior loop bar both sides are connected with two flexible internal screw rod rotations that are located same translation slide.

As the optimization, hoist device still includes hoist rope winding structure, and hoist rope winding structure includes take-up pulley, spring, synchronizing sprocket and driving chain, and the spool is kept away from the one end of mounting disc and is set up synchronizing sprocket, links to each other through the driving chain between four synchronizing sprocket, and hoist plate middle part is offered along hoist and mount slat length direction and is cooperated the spout, and the slip sets up a set of take-up pulley that is used for driving chain to stretch into in the cooperation spout, and one of them synchronizing sprocket is used for driving synchronizing sprocket pivoted synchronous motor outward.

As the optimization, set up auxiliary slideway along hoist and mount slat length direction on the hoist and mount slat, equal symmetry sets up two sets of bearing structure in every auxiliary slideway, every bearing structure of group all includes two-way screw one, stand up the landing leg, diagonal brace and walking wheel, two-way screws one that are located same auxiliary slideway are on same straight line, and two-way screw one is rotated through motor one and is set up in auxiliary slideway, two-way screw one's both ends set up landing leg cover and enhancement cover respectively, stand up the landing leg and articulate on the landing leg cover, diagonal brace articulates on the enhancement cover, diagonal brace keeps away from and strengthens cover one end rotation setting connection sliding sleeve, connection sliding sleeve is established on stand up the landing leg, stand up the landing leg and keep away from the one end of landing leg cover and set up the walking wheel.

As optimization, the lifting lath is provided with an adjusting slide way along the length direction of the lifting lath, a distance adjusting structure is arranged in the adjusting slide way and comprises a two-way screw rod II and nuts, the two-way screw rod II is driven by a motor II to be arranged in the adjusting slide way, two nuts are respectively arranged on two sides of the two-way screw rod II, and the end part of the shearing fork frame is rotationally connected with the four nuts on the two-way screw rod II.

As optimization, hanging rings for connecting the hanging ropes are arranged at two ends above the hanging strip plates.

As optimization, the two ends above the lifting slat are provided with the balance weights, and the two balance weights on the same lifting slat are positioned between the two lifting rings.

The effects provided in the summary of the invention are merely effects of embodiments, not all effects of the invention, and the above technical solution has the following advantages or beneficial effects:

1. the inner frame is sent into the box culvert, so that the hoisting slat can adapt to box culverts with different widths to be supported at the top angle of the box culvert, and the box culvert can be effectively prevented from being skewed during subsequent hoisting;

2. after the inner frame is sent into and regulated, the outer frame is positioned outside the box culvert, the outer frame and the inner frame are connected together through hoisting ropes, the box culvert is clamped in the inner frame, then the steel wire ropes are tightened through driving reels to rotate, so that the distance between the outer frame and the inner frame is shortened until the bottom of the outer frame and the top of the inner frame are attached to the surface of the box culvert, hoisting ropes at four corners can also block the change of the shifting gravity center of the box culvert and the like, and then the box culvert can be stably hoisted through the limiting fixation of the outer frame and the inner frame by hoisting plates;

3. through adjusting comparatively tight or loose one of them hoist and mount rope, the flexible internal screw rod of drive rotates, and both relative movement under the cooperation with flexible spiral shell section of thick bamboo, and then drives the spool and remove the change position to change the distance of spool to inner frame, realize unreeling or receipts rope, thereby change the uneven crooked, the phenomenon of rocking etc. of atress, very important when hoisting the box culvert, promote box culvert hoist and mount security and do benefit to the butt joint construction.

Drawings

The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention.

FIG. 1 is a schematic view of the front side view angle structure of the present invention;

FIG. 2 is a schematic view of the bottom view structure of the present invention;

FIG. 3 is a schematic view of a side elevation view of the hanger plate of the present invention;

FIG. 4 is a schematic top view of the present invention;

FIG. 5 is an enlarged view of the portion A of FIG. 4 according to the present invention;

FIG. 6 is a schematic diagram of a semi-sectional structure in a depression view of the present invention;

FIG. 7 is an enlarged view of the portion B of FIG. 6 according to the present invention;

FIG. 8 is a schematic view showing a half-section structure of a hanger plate according to the present invention;

FIG. 9 is a schematic side view of the present invention in use;

fig. 10 is a schematic diagram of the front view of the present invention.

In the figure, 1, an inner frame; 2. an outer frame; 3. a scissors fork; 4. hoisting the slat; 5. a nut; 6. adjusting the slideway; 7. a two-way screw rod II; 8. a balance weight; 9. a hanging plate; 10. a reel; 11. hoisting ropes; 12. telescoping the inner screw; 13. a telescopic screw cylinder; 14. an auxiliary slideway; 15. a bidirectional screw rod I; 16. a support leg sleeve; 17. a reinforcing sleeve; 18. standing the supporting leg; 19. a diagonal brace; 20. the sliding sleeve is connected; 21. a walking wheel; 22. a mounting cavity; 23. a translation slide; 24. a mounting plate; 25. matching with the sliding groove; 26. a tensioning wheel; 27. adapting to a spring; 28. a synchronizing sprocket; 29. a drive chain; 30. fixing the support plate; 31. an inner loop bar; 32. an outer convex ring; 33. adjusting a motor; 34. an adjusting gear; 35. stabilizing the gear; 36. and (5) hanging rings.

Detailed Description

In order to clearly illustrate the technical features of the present solution, the present invention will be described in detail below with reference to the following detailed description and the accompanying drawings. The following disclosure provides many different embodiments, or examples, for implementing different structures of the invention. In order to simplify the present disclosure, components and arrangements of specific examples are described below. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. It should be noted that the components illustrated in the figures are not necessarily drawn to scale. Descriptions of well-known components and processing techniques and processes are omitted so as to not unnecessarily obscure the present invention. The terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like refer to an orientation or positional relationship based on that shown in the drawings, merely for convenience of description and to simplify the description, and do not denote or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

As shown in fig. 1 to 10, a prefabricated box culvert safe hoisting device comprises an inner frame 1 and an outer frame 2, and further comprises a shearing fork frame 3, a supporting structure, a distance adjusting structure and a box culvert limiting structure, wherein the outer frame 2 is arranged above the inner frame 1, the outer frame 2 is connected with the inner frame 1 through the box culvert limiting structure, the box culvert limiting structure is arranged on the outer frame 2 and used for limiting the box culvert position between the outer frame 2 and the inner frame 1, the inner frame 1 comprises two hoisting laths 4, the two hoisting laths 4 are movably connected with the shearing fork frame 3 through the distance adjusting structure, the distance adjusting structure is used for adjusting the distance between the two hoisting laths 4, and the bottoms of the two hoisting laths 4 are all provided with supporting structures for adjusting the height of the hoisting laths 4.

In this embodiment, outer frame 2 includes hoist and mount board 9, hoist and mount board 9 is inside to be offered installation cavity 22, installation cavity 22 both sides set up translation slide 23 along hoist and mount slat 4 length direction, box culvert limit structure includes drive assembly, spool 10 and hoist and mount rope 11, all set up two spools 10 in every translation slide 23, the rolling has hoist and mount rope 11 on spool 10, hoist and mount board 9 are worn out to hoist and mount board 9 respectively with adjacent hoist and mount slat 4's end connection to the one end that spool 10 was kept away from to four hoist and mount ropes 11, drive assembly sets up on hoist and mount board 9, drive assembly drive spool 10 moves along translation slide 23.

The drive assembly sets up four groups, and every group drive assembly all includes adjustment motor 33, flexible internal screw rod 12, flexible spiral shell section of thick bamboo 13 and intermeshing's adjustment gear 34 and stabilizing gear 35, and adjustment motor 33 sets up at hoist and mount board 9 top, and adjustment motor 33's output sets up adjustment gear 34, stabilizing gear 35 and flexible internal screw rod 12 rigid coupling, flexible internal screw rod 12 are located translation slide 23, flexible spiral shell section of thick bamboo 13 of threaded connection on the flexible internal screw rod 12, link to each other with spool 10 tip through mounting disc 24 on the flexible spiral shell section of thick bamboo 13. During hoisting, when one corner is too high or one corner is too low to cause uneven stress, the adjusting motor 33 corresponding to the corner with uneven stress is connected, the adjusting motor 33 rotates to drive the adjusting gear 34 to rotate so as to drive the stabilizing gear 35 meshed with the adjusting gear 34 to rotate, the stabilizing gear 35 rotates to drive the telescopic inner screw rod 12 to rotate, and the telescopic screw cylinder 13 in threaded connection with the telescopic inner screw rod is further outwards extended or inwards shortened, so that the reel 10 is driven to translate, the position of the terminal of the hoisting rope 11 is further changed, namely, the distance between the hoisting plate 9 corresponding to the corner and the inner frame 1 is changed, and therefore the purposes of adjusting stress, stabilizing hoisting, avoiding accidents such as skew collision and falling are achieved, and the like are achieved.

The hoisting device further comprises a driving component fixing structure, the driving component fixing structure comprises a fixing support plate 30 and an inner sleeve rod 31, the fixing support plate 30 is arranged at the top of the hoisting plate 9, the fixing support plate 30 is located in the middle of the translation slideway 23 and perpendicular to the length direction of the hoisting slat 4, the inner sleeve rod 31 is arranged at the end part of the fixing support plate 30, outer convex rings 32 are arranged at two sides of the inner sleeve rod 31, anti-falling grooves which are in rotary fit with the outer convex rings 32 are formed in the end parts, close to each other, of the two telescopic inner screws 12 located in the same translation slideway 23, and two sides of the inner sleeve rod 31 are in rotary connection with the two telescopic inner screws 12 located in the same translation slideway 23.

In this embodiment, hoist device still includes hoist rope winding structure, hoist rope winding structure includes take-up pulley 26, spring 27, synchronizing sprocket 28 and driving chain 29, spool 10 is kept away from the one end of mounting disc 24 and is set up synchronizing sprocket 28, link to each other through driving chain 29 between four synchronizing sprocket 28, hoist plate 9 middle part is offered along hoist and mount slat 4 length direction and is cooperated spout 25, the slip sets up a set of take-up pulley 26 that is used for driving chain 29 to stretch into in cooperated spout 25, one of them synchronizing sprocket 28 sets up the synchronous motor that is used for driving synchronizing sprocket 28 pivoted outward. All the synchronous chain wheels 28 can be driven to rotate together through the driving chain 29, so that the reel 10 is driven to synchronously wind or unwind, and the length of the hoisting rope 11 between the inner frame 1 and the outer frame 2 is synchronously adjusted, so that the distance between the inner frame 1 and the outer frame 2 can be adjusted, and then, box culverts with different thicknesses can be adapted, the inner frame 1 and the outer frame 2 can clamp the box culverts in the middle, and the adjustment is simple and convenient; when the box culvert is regulated to be in a flat stable state during hoisting, the tensioning wheel 26 is acted on by the driving chain 29 during moving of the box culvert, so that the tensioning wheel 26 translates along the matched sliding groove 25, further the movement of the box culvert is adapted to the moving of the box culvert 10, the driving chain 29 can be still sleeved on all the chain wheels, synchronous driving can be realized, and single position regulation can also be realized.

In this embodiment, the hoisting slat 4 is provided with two sets of support structures along the length direction of the hoisting slat 4, each set of support structures is symmetrically arranged in each set of support structures, each set of support structures comprises a bi-directional first lead screw 15, a stand-up supporting leg 18, an inclined supporting rod 19 and a travelling wheel 21, the two bi-directional first lead screws 15 in the same auxiliary slideway 14 are on the same straight line, the bi-directional first lead screws 15 are arranged in the auxiliary slideway 14 in a driving way by a motor, the two ends of the bi-directional first lead screws 15 are respectively provided with a supporting leg sleeve 16 and a reinforcing sleeve 17, the stand-up supporting legs 18 are hinged on the supporting leg sleeves 16, the inclined supporting rods 19 are hinged on the reinforcing sleeves 17, one ends of the inclined supporting rods 19 far away from the reinforcing sleeves 17 are rotatably provided with connecting sliding sleeves 20, the connecting sliding sleeves 20 are slidably sleeved on the stand-up supporting legs 18, and one ends of the stand-up supporting legs 18 far away from the supporting leg sleeves 16 are provided with travelling wheels 21. The two-way screw rod I15 can be connected, so that the same group of supporting leg sleeves 16 and the reinforcing sleeve 17 are mutually synchronously close to each other, the standing supporting legs 18 are rotated from a folded state to be changed into a vertical state or a near vertical state, meanwhile, the inclined supporting rods 19 are also rotated to be opened, an auxiliary supporting effect is achieved on the standing supporting legs 18, the specific lifting degree of the inner frame 1 can be adjusted according to the inner height of the box culvert to be lifted, the height of the inner frame 1 is consistent with the height of the box culvert, the inner frame 1 can be pushed to enter the box culvert through the travelling wheels 21, meanwhile, the lifting lath 4 is just supported at the inner top angle of the box culvert, the lifting lath is not obliquely moved, the lifting lath is simple and convenient to put in, the supporting is stable, the subsequent lifting is facilitated, the lifting lath can be folded and folded when the lifting lath is not used, and the lifting lath is convenient to carry.

In this embodiment, the lifting lath 4 is provided with an adjusting slide 6 along the length direction of the lifting lath 4, a distance adjusting structure is arranged in the adjusting slide 6, the distance adjusting structure comprises a two-way screw rod II 7 and nuts 5, the two-way screw rod II 7 is driven by a motor II to be arranged in the adjusting slide 6, two nuts 5 are respectively arranged at two sides of the two-way screw rod II 7, and the end part of the scissor frame 3 is rotationally connected with four nuts 5 on the two-way screw rod II 7.

In this embodiment, hanging rings 36 for connecting the hanging ropes 11 are arranged at the two ends above the hanging strip plates 4.

Two ends above the lifting slat 4 are provided with balance weights 8, and two balance weights 8 on the same lifting slat 4 are positioned between two lifting rings 36.

According to the invention, the inner frame 1 is sent into the box culvert, and the two-way screw rod II 7 is driven to rotate, so that the fork shearing frame 3 rotates to open or close, the distance between the two hoisting laths 4 is changed, the hoisting laths 4 can adapt to the box culverts with different widths so as to be supported at the top angles of the box culverts, and the box culverts can be effectively ensured not to be skewed during subsequent hoisting; after the inner frame 1 is sent into and adjusted, make the outer frame 2 lie in the box culvert outside, link together outer frame 2 and inner frame 1 through wire rope 11, clamp the box culvert wherein, then rotate through driving spool 10, tighten up wire rope 11, thereby make the distance between outer frame 2 and the inner frame 1 shorten, until the bottom of outer frame 2 and the top of inner frame 1 paste with the surface of box culvert, hoisting rope 11 in four corners department also can block box culvert shift focus change etc., then can be through hoisting plate 9 through the spacing fixed of outer frame 2 and inner frame 1 firmly hoist the box culvert, in the hoist and mount in-process, if the skew hoist and mount of box culvert of four corners department atress is unstable, then through adjusting comparatively tight or loose one of them hoist rope 11, rotate through driving flexible inner screw 12, under the cooperation with flexible spiral shell section of thick bamboo 13, and then drive spool 10 removes the change position, thereby change spool 10 to the distance of inner frame 1, realize rope release or receipts rope, thereby change the phenomenon of the hoist and mount of atress inequality, when lifting, it is important to hoist and mount, safety very in lifting.

While the foregoing description of the embodiments of the present invention has been presented with reference to the drawings, it is not intended to limit the scope of the invention, but rather, it is apparent that various modifications or variations can be made by those skilled in the art without the need for inventive work on the basis of the technical solutions of the present invention.

Claims (9)

1. The utility model provides a prefabricated box culvert safety hoist device, includes interior frame (1) and outer frame (2), characterized by: still including cutting fork frame (3), bearing structure, roll adjustment structure and box culvert limit structure, interior frame (1) top sets up outer frame (2), outer frame (2) link to each other through box culvert limit structure with interior frame (1), box culvert limit structure sets up on outer frame (2) for limit box culvert position between outer frame (2) and interior frame (1), interior frame (1) include two hoist and mount laths (4), two hoist and mount laths (4) link to each other through roll adjustment structure and cutting fork frame (3) activity, roll adjustment structure is used for adjusting the interval between two hoist and mount laths (4), two hoist and mount lath (4) bottoms all are equipped with the bearing structure who is used for adjusting hoist and mount lath (4) height.

2. The prefabricated box culvert safety hoisting device of claim 1, characterized by: the outer frame (2) comprises a hoisting plate (9), a mounting cavity (22) is formed in the hoisting plate (9), two sides of the mounting cavity (22) are provided with translation sliding ways (23) along the length direction of the hoisting slat (4), the box culvert limiting structure comprises a driving assembly, a reel (10) and hoisting ropes (11), two reels (10) are arranged in each translation sliding way (23), the hoisting ropes (11) are wound on the reels (10), one ends, far away from the reels (10), of the four hoisting ropes (11) penetrate out of the hoisting plate (9) and are connected with the end portions of the adjacent hoisting slats (4) respectively, the driving assembly is arranged on the hoisting plate (9), and the driving assembly drives the reels (10) to move along the translation sliding ways (23).

3. The prefabricated box culvert safety hoisting device of claim 2, characterized by: the drive assembly sets up four groups, every group drive assembly all includes adjustment motor (33), flexible interior screw rod (12), flexible spiral shell section of thick bamboo (13) and intermeshing's adjustment gear (34) and stabilizing gear (35), adjustment motor (33) set up at hoist and mount board (9) top, the output of adjustment motor (33) sets up adjustment gear (34), stabilizing gear (35) and flexible interior screw rod (12) rigid coupling, flexible interior screw rod (12) are located translation slide (23), flexible spiral shell section of thick bamboo (13) of threaded connection on flexible interior screw rod (12), link to each other with spool (10) tip through mounting disc (24) on flexible spiral shell section of thick bamboo (13).

4. A prefabricated box culvert safety lifting device in accordance with claim 3, characterized by: the hoisting device further comprises a driving component fixing structure, the driving component fixing structure comprises a fixing support plate (30) and an inner sleeve rod (31), the fixing support plate (30) is arranged at the top of the hoisting plate (9), the fixing support plate (30) is located in the middle of the translation slide way (23) and perpendicular to the length direction of the hoisting slat (4), the inner sleeve rod (31) is arranged at the end part of the fixing support plate (30), outer convex rings (32) are arranged at the two sides of the inner sleeve rod (31), anti-falling grooves which are in running fit with the outer convex rings (32) are formed in the end parts, close to each other, of the two telescopic inner screws (12) located in the same translation slide way (23), and the two sides of the inner sleeve rod (31) are connected with the two telescopic inner screws (12) located in the same translation slide way (23) in a rotating mode.

5. A prefabricated box culvert safety lifting device in accordance with claim 3, characterized by: hoist device still includes hoist rope winding structure, hoist rope winding structure includes take-up pulley (26), spring (27), synchronizing sprocket (28) and driving chain (29), spool (10) are kept away from the one end of mounting disc (24) and are set up synchronizing sprocket (28), link to each other through driving chain (29) between four synchronizing sprocket (28), cooperation spout (25) are seted up along hoist slat (4) length direction in hoist and mount board (9) middle part, the cooperation is in spout (25) the slip and is set up a set of take-up pulley (26) that are used for driving chain (29) to stretch into, one of them synchronizing sprocket (28) peripheral hardware is used for driving synchronizing sprocket (28) pivoted synchronous motor.

6. The prefabricated box culvert safety hoisting device of claim 1 or 2, characterized in that: the hoisting slat (4) is provided with auxiliary slide ways (14) along the length direction of the hoisting slat (4), two groups of supporting structures are symmetrically arranged in each auxiliary slide way (14), each group of supporting structures comprises a first bidirectional screw (15), a rising supporting leg (18), an inclined supporting rod (19) and a travelling wheel (21), two first bidirectional screws (15) positioned in the same auxiliary slide way (14) are arranged on the same straight line, the first bidirectional screws (15) are driven by a motor to rotate and are arranged in the auxiliary slide way (14), the two ends of the first bidirectional screws (15) are respectively provided with a supporting leg sleeve (16) and a reinforcing sleeve (17), the rising supporting legs (18) are hinged on the supporting leg sleeves (16), the inclined supporting rods (19) are hinged on the reinforcing sleeves (17), one ends of the inclined supporting rods (19) are far away from the reinforcing sleeves (17) and are rotatably provided with connecting sliding sleeves (20), the connecting sliding sleeves (20) are arranged on the rising supporting legs (18), and one ends of the rising supporting legs (18) far away from the supporting leg sleeves (16) are provided with travelling wheels (21).

7. The prefabricated box culvert safety hoisting device of claim 1 or 2, characterized in that: the lifting strip plate (4) is provided with an adjusting slide way (6) along the length direction of the lifting strip plate (4), the adjusting slide way (6) is internally provided with a distance adjusting structure, the distance adjusting structure comprises a two-way screw rod II (7) and screw nuts (5), the two-way screw rod II (7) is driven by a motor II to be arranged in the adjusting slide way (6), two screw nuts (5) are respectively arranged on two sides of the two-way screw rod II (7), and the end part of the scissor frame (3) is rotationally connected with the four screw nuts (5) on the two-way screw rod II (7).

8. The prefabricated box culvert safety hoisting device of claim 2, characterized by: hanging rings (36) used for connecting the hanging ropes (11) are arranged at the two ends above the hanging strip plates (4).

9. The prefabricated box culvert safety hoisting device of claim 8, characterized by: two ends above the lifting strip plate (4) are provided with balance weights (8), and the two balance weights (8) on the same lifting strip plate (4) are positioned between the two lifting rings (36).