CN115123933A

CN115123933A - Crane hoisting protective equipment for engineering construction

Info

Publication number: CN115123933A
Application number: CN202210725141.4A
Authority: CN
Inventors: 宋亚冲; 肖帅; 何培龙
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-06-23
Filing date: 2022-06-23
Publication date: 2022-09-30

Abstract

The invention discloses crane hoisting protection equipment for engineering construction, which relates to the technical field of cranes and comprises a horizontal pulling frame, wherein four corners of the bottom of the horizontal pulling frame are fixedly connected with protection plates through connecting columns, and the middle parts of the protection plates are provided with translation holes. According to the invention, by arranging the contact plate, when the lifting rope is recovered, the winch can be effectively prevented from being damaged by a lifting hook or a heavy object, the metal sheet can be moved upwards to be in contact with the conductive contact, so that the driving motor is powered off, and the purpose of protecting the winch is achieved.

Description

Crane hoisting protective equipment for engineering construction

Technical Field

The invention relates to the technical field of cranes, in particular to crane hoisting protection equipment for engineering construction.

Background

The engineering construction is a special subject for accounting of the integrated accounting engineering cost of the building installation enterprises, and is a new construction, extension and reconstruction activity for the construction engineering according to the requirements of the design files of the construction engineering. Cranes are present in almost every construction site, mainly because the construction material needs to be hoisted with a crane at the construction site. Various types of hoisting machinery are provided, cranes, navigation vehicles and overhead traveling cranes are popular names of people for cranes, different cranes can play the greatest role in proper environments, the crane often needs to vertically hoist required materials when in use, the materials are put down after being horizontally moved on a plane with a preset height, the required materials are transferred to positions needing to be used, when the crane hoists the materials, an operator cannot see the positions of the lifting hooks in a close range, the lifting hooks are always pressed against the top in actual operation, the lifting hooks can knock the guardrails below the crane to be bent, secondly, when the crane is used for horizontally moving heavy objects, the heavy objects often swing in the air due to inertia in the horizontal direction in the air, and steel wire ropes between the crane and the heavy objects are inclined, which is very dangerous, not only is the possibility that a heavy object impacts a nearby building, but also the situation that a hoisted object falls off can occur, and construction accidents are easily caused.

At present, current hoist for engineering construction can't avoid excessively receiving the rope when retrieving the lifting hook when using, thereby the bottom guardrail on lifting hook and the hoist that leads to wire rope below takes place the striking, can influence the life-span of hoist, and when with heavy object horizontal migration, because the object weight of hoist and mount is different, wire rope takes place to one side the angle of drawing is also different when taking place horizontal displacement with same acceleration, take place excessively to draw the condition that the heavy object played to one side and swayed when the object is overweight, if operating personnel does not know to draw the degree to one side, danger takes place very easily.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides crane hoisting protection equipment for engineering construction, which has the advantages of effectively protecting a winch and reminding operators of the diagonal pulling degree of a heavy object and the like, and solves the problems in the prior art.

(II) technical scheme

In order to achieve the purpose of effectively protecting the winch and reminding an operator of the diagonal pulling degree of the heavy object, the invention provides the following technical scheme: a crane hoisting protection device for engineering construction comprises a horizontal drawing frame, wherein four corners of the bottom of the horizontal drawing frame are fixedly connected with protection plates through connecting columns, the middle of each protection plate is provided with a translation hole, a protection box is slidably clamped in the translation hole, two sides of the bottom of the horizontal drawing frame are fixedly connected with bearing frames, the middle of each bearing frame is movably connected with a bearing column through a connecting bearing, the middle side of each bearing column is fixedly connected with a rope winding drum, and the middle side of each rope winding drum is wound with a lifting rope;

the middle part of the protection box is provided with a rope penetrating groove, the top of the rope penetrating groove is provided with a clamping wheel, the side surface of the middle part of the clamping wheel is fixedly connected with a compression spring, the top of the compression spring is fixedly connected with a compression ring, the outer wall of the compression ring is tightly attached to a lifting rope, the middle part of the clamping wheel is slidably connected with a sliding shaft through a sliding spline, two ends of the sliding shaft are fixedly connected with iron blocks, the top of the protection plate is fixedly connected with an installation column, and the top of the installation column is fixedly connected with an electromagnet;

the top of the protection box is provided with a generator, a storage battery is arranged in the protection box, the inner wall of the generator is fixedly connected with a stator, the side wall of the generator is movably connected with a rotor through a positioning bearing, and the middle part of the rotor is in sliding connection with a sliding shaft through a sliding spline;

the inner wall of the protective box is movably connected with a connecting shaft through a bearing block, the top of the connecting shaft is in transmission connection with a sliding shaft through a bevel gear set, the bottom of the connecting shaft is fixedly connected with a reduction bevel gear, the reduction bevel gear is in transmission connection with a driving shaft through a driving fluted disc, two ends of the driving shaft are both fixedly connected with driving gears, and the top of the protective plate is provided with a track rack meshed with the driving gears;

the lower side wall of the rope threading groove is provided with a movable hole, a metal rod is inserted into the movable hole, the inner wall of the movable hole is provided with a clamping piece for clamping the metal rod, the outer end of the metal rod is fixedly connected with a transverse moving frame, four corners of the transverse moving frame are provided with sliding grooves, the inside of each sliding groove is connected with a sliding column in a sliding manner, the bottom of each sliding column is fixedly connected with a contact plate, and the middle of each contact plate is provided with a round hole for inserting a lifting rope;

the bottom of the transverse moving frame is fixedly connected with a power-off block, a circular groove is formed in the side face of the power-off block, an ejection spring is arranged inside the circular groove, one end of the ejection spring is fixedly connected with a conductive contact, a metal sheet matched with the conductive contact is fixedly connected to the sliding column, and the conductive contact, the metal sheet and the electromagnet are all electrically connected with a controller through wires.

Preferably, the clamping piece and the metal rod are electrically connected with an external instrument through a lead, and a spherical column head is arranged at the end part of the metal rod.

Preferably, the top of the protection box is provided with a matching wheel matched and clamped with the clamping wheel, and two ends of a rotating shaft of the matching wheel are fixedly connected with the corresponding rotors respectively.

Preferably, the number of the track racks is two, the two track racks are symmetrically arranged on two sides of the translation hole along the length direction, and the length of the track racks is greater than that of the translation hole.

Preferably, the four corners lateral wall of guard box has driven gear through bearing swing joint, meshing cooperation between driven gear and drive gear and two track racks.

Preferably, one side face of the bottom of the transverse pulling frame is fixedly connected with a gear box, the gear box is arranged at one end of the bearing column and clings to the bearing frame, and an output shaft of the gear box is in transmission connection with the bearing column.

Preferably, the bottom fixedly connected with motor mounting bracket of violently drawing the frame, bolt fixedly connected with driving motor is passed through to motor mounting bracket's bottom, driving motor's output shaft is connected with the input shaft transmission of gear box, driving motor is connected with the controller electricity.

Preferably, two symmetrical side surfaces of the transverse pulling frame are respectively and fixedly connected with two transverse pulling blocks, and the transverse pulling blocks are fixedly connected with steel wire ropes for transversely moving the transverse pulling frame.

Preferably, two rows of transverse moving rollers are symmetrically arranged on two sides of the top of the transverse pulling frame, the transverse moving rollers roll on a cross beam of the crane, and the transverse moving rollers on each row of transverse moving rollers are distributed at equal intervals.

Three beneficial effects

Compared with the prior art, the invention provides a crane hoisting protection device for engineering construction, which has the following beneficial effects:

1. this hoist jack-up protective equipment for engineering construction through setting up the contact plate, when retrieving the lifting rope, can effectually avoid the hoist engine to be bruised by lifting hook or heavy object, after being extrudeed the rebound through the contact plate, can make the sheetmetal rebound and electrically conductive contact between the contact to the outage of driving motor reaches the purpose of protection hoist engine.

2. This hoist jack-up protective equipment for engineering construction through setting up the metal pole, when the lifting rope removes the heavy object and takes place the slope, can drive the metal pole through the lifting rope interlude in the inside of contact plate and remove, through the resistance of switch-on between metal pole and the tight piece of clamp, can judge the inclination of lifting rope, prevents to take place excessive oblique drawing.

3. This hoist jack-up protective equipment for engineering construction through setting up the pinch roller, can make the surface of clamp ring hug closely the lifting rope under compression spring's effect, can drive the sliding shaft rotation when the lifting rope takes place to remove, makes the generator electricity generation store the electric energy in the battery, can make drive gear drive protective box remove simultaneously, guarantees that the lifting rope winding displacement is smooth when receiving and releasing.

Drawings

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a schematic view of the structure of FIG. 1 at A according to the present invention;

FIG. 3 is a schematic bottom perspective view of a touch panel according to the present invention;

FIG. 4 is a schematic cross-sectional view of a conductive contact according to the present invention;

FIG. 5 is a schematic cross-sectional view of the protective case of the present invention;

FIG. 6 is a schematic view of the structure of FIG. 5 at B in accordance with the present invention;

FIG. 7 is a schematic cross-sectional view of a metal rod according to the present invention.

In the figure: 1. transversely pulling the frame; 2. a motor mounting bracket; 3. a drive motor; 4. a gear case; 5. a protective box; 6. a driven gear; 7. a protection plate; 8. a drive gear; 9. a hook; 10. a lifting rope; 11. mounting a column; 12. an electromagnet; 13. a rope drum; 14. a bearing post; 15. connecting a bearing; 16. a bearing bracket; 17. transversely pulling the block; 18. transversely moving the roller; 19. a pinch wheel; 20. a generator; 21. a track rack; 22. an iron block; 23. a power-off block; 24. a metal sheet; 25. a contact plate; 26. transversely moving the frame; 27. a sliding post; 28. rope threading grooves; 29. a metal rod; 30. ejecting a spring; 31. a conductive contact; 32. a sliding groove; 33. a translation aperture; 34. a drive shaft; 35. a driving fluted disc; 36. a reduction bevel gear; 37. a connecting shaft; 38. a bearing block; 39. a bevel gear set; 40. a sliding shaft; 41. a compression ring; 42. a compression spring; 43. a sliding spline; 44. a stator; 45. positioning the bearing; 46. a rotor; 47. a movable hole; 48. and (5) clamping the sheet.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

Referring to fig. 1-5, a crane hoisting protection device for engineering construction comprises a horizontal pulling frame 1, wherein four corners of the bottom of the horizontal pulling frame 1 are fixedly connected with protection plates 7 through connecting columns, the middle parts of the protection plates 7 are provided with translation holes 33, and protection boxes 5 are slidably clamped in the translation holes 33; the bottom of the transverse pulling frame 1 is provided with a winch, the bottom of the winch extends out of a lifting rope 10, the middle part of the protective box 5 is provided with a rope penetrating groove 28, the lower side wall of the rope penetrating groove 28 is provided with a movable hole 47, a metal rod 29 is inserted in the movable hole 47, the inner wall of the movable hole 47 is provided with a clamping sheet 48 for clamping the metal rod 29, the outer end of the metal rod 29 is fixedly connected with a transverse moving frame 26, the clamping sheet 48 and the metal rod 29 are electrically connected with an external instrument through a conducting wire, the end part of the metal rod 29 is provided with a spherical column head, the top of the rope penetrating groove 28 is provided with a clamping wheel 19, the side surface of the middle part of the clamping wheel 19 is fixedly connected with a pressing spring 42, the top of the pressing spring 42 is fixedly connected with a pressing ring 41, the outer wall of the pressing ring 41 is tightly attached to the lifting rope 10, the middle part of the clamping wheel 19 is slidably connected with a sliding shaft 40 through a sliding spline 43, the two ends of the sliding shaft 40 are fixedly connected with iron blocks 22, the top of the protection plate 7 is fixedly connected with a mounting column 11, the top of the mounting column 11 is fixedly connected with an electromagnet 12, four corners of a transverse frame 26 are all provided with sliding grooves 32, the inside of the sliding groove 32 is slidably connected with a sliding column 27, the bottom of the sliding column 27 is fixedly connected with a contact plate 25, the middle part of the contact plate 25 is provided with a round hole for inserting a lifting rope 10, the bottom of the transverse frame 26 is fixedly connected with a power-off block 23, the side surface of the power-off block 23 is provided with a round groove, the inside of the round groove is provided with an ejection spring 30, one end of the ejection spring 30 is fixedly connected with a conductive contact 31, the sliding column 27 is fixedly connected with a metal sheet 24 matched with the conductive contact 31, the metal sheet 24 and the electromagnet 12 are all electrically connected with a controller through wires, two symmetrical side surfaces of the transverse frame 1 are respectively fixedly connected with two transverse pull blocks 17, the transverse pull blocks 17 are fixedly connected with a steel wire rope for transversely moving the transverse pull frame 1, two rows of transverse moving rollers 18 are symmetrically arranged on two sides of the top of the transverse pulling frame 1, the transverse moving rollers 18 roll on a cross beam of the crane, and the transverse moving rollers 18 on each row of transverse moving rollers 18 are distributed at equal intervals.

When the cable winding device is used, firstly, the electromagnet 12 is electrified when the lifting rope 10 is released, the sliding shaft 40 is driven to rotate when the lifting rope 10 is lowered, the generator 20 is used for generating electricity, meanwhile, the driving gear 8 can be driven to slowly move on the track rack 21, the protective box 5 is ensured to move along with the position, released by the lifting rope 10, on the rope winding drum 13, the electromagnet 12 adsorbs the iron block 22 to enable the sliding shaft 40 to displace when the end part is reached, the moving direction of the protective box 5 is changed when the other group of bevel gear sets 39 are switched on, the electromagnet 12 is powered off when the lifting rope 10 is withdrawn, and when the end part is reached, the protective box 5 continues to be close to the electromagnet 12 under the inertia effect, so that the iron block 22 is pushed to move, the moving direction of the protective box 5 is changed, and the purpose of winding the lifting rope 10 on the rope winding drum 13 is achieved.

Example 2

Referring to fig. 1-7, a crane hoisting protection device for engineering construction comprises a horizontal pulling frame 1, wherein four corners of the bottom of the horizontal pulling frame 1 are fixedly connected with protection plates 7 through connecting columns, the middle part of each protection plate 7 is provided with a translation hole 33, and a protection box 5 is slidably clamped in the translation hole 33; the bottom of the transverse pulling frame 1 is provided with a winch, the bottom of the winch extends out of a lifting rope 10, the middle of the protective box 5 is provided with a rope penetrating groove 28, the lower side wall of the rope penetrating groove 28 is provided with a movable hole 47, a metal rod 29 is inserted in the movable hole 47, the inner wall of the movable hole 47 is provided with a clamping sheet 48 for clamping the metal rod 29, the outer end of the metal rod 29 is fixedly connected with a transverse pulling frame 26, the clamping sheet 48 and the metal rod 29 are electrically connected with an external instrument through a wire, the end part of the metal rod 29 is provided with a spherical column head, the winch comprises a bearing frame 16 fixedly connected with two sides of the bottom of the transverse pulling frame 1, the middle of the bearing frame 16 is movably connected with a bearing column 14 through a connecting bearing 15, the middle side of the bearing column 14 is fixedly connected with a rope rolling barrel 13, the middle side of the rope rolling barrel 13 is wound with the lifting rope 10, the bottom of the transverse pulling frame 1 is fixedly connected with a motor mounting frame 2, and the bottom of the motor mounting frame 2 is fixedly connected with a driving motor 3 through a bolt, an output shaft of a driving motor 3 is in transmission connection with an input shaft of a gear box 4, the driving motor 3 is electrically connected with a controller, one side surface of the bottom of a transverse pulling frame 1 is fixedly connected with the gear box 4, the gear box 4 is arranged at one end of a bearing column 14 and clings to a bearing frame 16, an output shaft of the gear box 4 is in transmission connection with the bearing column 14, the top of a protection box 5 is provided with a generator 20, a storage battery is arranged inside the protection box 5, the inner wall of the generator 20 is fixedly connected with a stator 44, the side wall of the generator 20 is movably connected with a rotor 46 through a positioning bearing 45, the middle part of the rotor 46 is in sliding connection with a sliding shaft 40 through a sliding spline 43, the top of the protection box 5 is provided with a matching wheel which is matched and clamped with a clamping wheel 19, two ends of a rotating shaft of the matching wheel are respectively and fixedly connected with the corresponding rotor 46, and the inner wall of the protection box 5 is movably connected with a connecting shaft 37 through a bearing block 38, the top of connecting axle 37 is connected with the transmission of sliding shaft 40 through bevel gear group 39, the bottom fixedly connected with of connecting axle 37 slows down bevel gear 36, it is connected with drive shaft 34 to slow down bevel gear 36 through the transmission of drive fluted disc 35, the equal fixedly connected with drive gear 8 in both ends of drive shaft 34, the top of guard plate 7 is provided with the track rack 21 with drive gear 8 meshing, track rack 21 has two, two track rack 21 symmetries set up the both sides along length direction in translation hole 33, the length of track rack 21 is greater than the length in translation hole 33, the four corners lateral wall of guard box 5 has driven gear 6 through bearing swing joint, meshing cooperation between driven gear 6 and drive gear 8 and two track racks 21.

When the lifting rope 10 is retracted, if the lifting hook 9 and the contact plate 25 are tightly pressed, the sliding column 27 can move upwards, when the conductive contact 31 contacts the metal sheet 24, the driving motor 3 is controlled by the controller to stop rotating, the lifting hook 9 is prevented from impacting a winch, when the lifting rope 10 moves too long and horizontally, the lifting rope 10 can be obliquely pulled along the opposite direction of movement due to inertia of a heavy object, the lifting rope 10 can move the contact plate 25 to enable the metal rod 29 to slide in the movable hole 47, an inclined angle can be displayed on an external instrument through resistance change between the clamping sheet 48 and the metal rod 29, an operator can know the inclined angle at any time, and the lifting rope 10 is prevented from being excessively inclined; through the contact plate 25, when the lifting rope 10 is recovered, the winch can be effectively prevented from being damaged by the hook 9 or a heavy object, after the contact plate 25 is extruded to move upwards, the metal sheet 24 can move upwards to be in contact with the conductive contact 31, so that the power of the driving motor 3 is cut off, and the purpose of protecting the winch is achieved, through the metal rod 29, when the lifting rope 10 moves the heavy object to incline, the metal rod 29 can be driven to move by penetrating the lifting rope 10 in the contact plate 25, through the resistance communicated between the metal rod 29 and the clamping sheet 48, the inclination angle of the lifting rope 10 can be judged, excessive oblique pulling is prevented, through the clamping wheel 19, the outer surface of the pressing ring 41 can be tightly attached to the lifting rope 10 under the action of the pressing spring 42, the sliding shaft 40 can be driven to rotate when the lifting rope 10 moves, so that the generator 20 generates electricity to store the electric energy in the storage battery, meanwhile, the driving gear 8 can drive the protective box 5 to move, and smooth wire arrangement of the lifting rope 10 is guaranteed when the lifting rope is retracted.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a hoist jack-up protective equipment for engineering construction, includes violently draws frame (1), its characterized in that: four corners of the bottom of the transverse pulling frame (1) are fixedly connected with a protective plate (7) through connecting columns, a translation hole (33) is formed in the middle of the protective plate (7), and a protective box (5) is slidably clamped in the translation hole (33);

the bottom of violently drawing frame (1) is provided with the hoist engine, the bottom of hoist engine is stretched out and is had lifting rope (10), rope passing groove (28) have been seted up at the middle part of guard box (5), movable hole (47) have been seted up to the lower part lateral wall of rope passing groove (28), metal pole (29) have been pegged graft to the inside of movable hole (47), the inner wall of movable hole (47) is provided with presss from both sides tight piece (48) of clamp tight metal pole (29), the outer end fixedly connected with sideslip frame (26) of metal pole (29), press from both sides tight piece (48) and metal pole (29) and be connected with outside instrument electricity through the wire, the tip of metal pole (29) is provided with the sphere column cap.

2. The crane hoisting protection device for engineering construction according to claim 1, characterized in that: the winch comprises a bearing frame (16) fixedly connected with two sides of the bottom of a transverse pulling frame (1), wherein the middle of the bearing frame (16) is movably connected with a bearing column (14) through a connecting bearing (15), the middle side of the bearing column (14) is fixedly connected with a rope winding drum (13), the middle side of the rope winding drum (13) is wound with a lifting rope (10), the bottom of the transverse pulling frame (1) is fixedly connected with a motor mounting frame (2), the bottom of the motor mounting frame (2) is fixedly connected with a driving motor (3) through a bolt, an output shaft of the driving motor (3) is in transmission connection with an input shaft of a gear box (4), the driving motor (3) is electrically connected with a controller, one side of the bottom of the transverse pulling frame (1) is fixedly connected with the gear box (4), the gear box (4) is arranged at one end of the bearing column (14) and tightly clings to the bearing frame (16), the output shaft of the gear box (4) is in transmission connection with a bearing column (14).

3. The crane hoisting protection device for engineering construction according to claim 1, characterized in that: the top of threading rope groove (28) is provided with pinch roller (19), the middle part side fixedly connected with pressure spring (42) of pinch roller (19), the top fixedly connected with clamp ring (41) of pressure spring (42), the outer wall and lifting rope (10) of clamp ring (41) paste tightly, there is slide shaft (40) at the middle part of pinch roller (19) through sliding spline (43) sliding connection, the both ends fixedly connected with iron plate (22) of slide shaft (40), the top fixedly connected with erection column (11) of guard plate (7), the top fixedly connected with electro-magnet (12) of erection column (11).

4. The crane hoisting protection device for engineering construction according to claim 1, characterized in that: the top of guard box (5) is provided with generator (20), the inside of guard box (5) is provided with the battery, the inner wall fixedly connected with stator (44) of generator (20), the lateral wall of generator (20) has rotor (46) through positioning bearing (45) swing joint, the middle part of rotor (46) is through sliding spline (43) and sliding shaft (40) sliding connection, the top of guard box (5) is provided with the cooperation wheel that presss from both sides tightly with pinch roller (19) cooperation, the pivot both ends of cooperation wheel respectively with rotor (46) fixed connection that corresponds.

5. The crane hoisting protection device for engineering construction according to claim 4, wherein: the inner wall of the protective box (5) is movably connected with a connecting shaft (37) through a bearing block (38), the top of the connecting shaft (37) is in transmission connection with a sliding shaft (40) through a bevel gear set (39), the bottom of the connecting shaft (37) is fixedly connected with a reduction bevel gear (36), the reduction bevel gear (36) is in transmission connection with a driving shaft (34) through a driving fluted disc (35), two ends of the driving shaft (34) are fixedly connected with driving gears (8), the top of the protective plate (7) is provided with two track racks (21) meshed with the driving gears (8), the two track racks (21) are symmetrically arranged on two sides of a translation hole (33) along the length direction, the length of the track racks (21) is greater than that of the translation hole (33), and the side walls of four corners of the protective box (5) are movably connected with driven gears (6) through bearings, the driven gear (6) and the driving gear (8) are meshed with the two track racks (21).

6. The crane hoisting protection device for engineering construction as claimed in claim 1, wherein: sliding grooves (32) are formed in four corners of the transverse moving frame (26), sliding columns (27) are connected to the inside of the sliding grooves (32) in a sliding mode, a contact plate (25) is fixedly connected to the bottoms of the sliding columns (27), and round holes penetrating through the lifting ropes (10) are formed in the middle of the contact plate (25).

7. The crane hoisting protection device for engineering construction according to claim 6, wherein: the bottom of the transverse moving frame (26) is fixedly connected with a power-off block (23), a circular groove is formed in the side face of the power-off block (23), an ejection spring (30) is arranged inside the circular groove, one end of the ejection spring (30) is fixedly connected with a conductive contact (31), a metal sheet (24) matched with the conductive contact (31) is fixedly connected onto the sliding column (27), and the conductive contact (31), the metal sheet (24) and the electromagnet (12) are electrically connected with a controller through wires.

8. The crane hoisting protection device for engineering construction as claimed in claim 1, wherein: two symmetrical side surfaces of the transverse pulling frame (1) are respectively and fixedly connected with two transverse pulling blocks (17), and steel wire ropes for transversely moving the transverse pulling frame (1) are fixedly connected to the transverse pulling blocks (17).

9. The crane hoisting protection device for engineering construction according to claim 1, characterized in that: two rows of transverse moving rollers (18) are symmetrically arranged on two sides of the top of the transverse pulling frame (1), the transverse moving rollers (18) roll on a cross beam of the crane, and the transverse moving rollers (18) on each row of transverse moving rollers (18) are distributed at equal intervals.