CN110203811B

CN110203811B - A safe type lifting device for building construction has anti-freezing function

Info

Publication number: CN110203811B
Application number: CN201910406492.7A
Authority: CN
Inventors: 楼群; 章旭江; 程勇俊; 高建文
Original assignee: Zhejiang Dongyang Third Construction Engineering Co ltd
Current assignee: ZHEJIANG DONGYANG THIRD CONSTRUCTION ENGINEERING Co.,Ltd.
Priority date: 2019-05-16
Filing date: 2019-05-16
Publication date: 2020-08-07
Anticipated expiration: 2039-05-16
Also published as: CN110203811A

Abstract

The invention relates to a safety hoisting device with an anti-freezing function for building construction, which comprises a tower body, a balance arm, a crane boom, a cockpit, a winding device, a heating mechanism and an alarm mechanism, wherein the heating mechanism comprises a heating chamber, a heating box, a fixed block, two communicating pipes and four air injection assemblies, each air injection assembly comprises a supporting shaft, a nozzle, a hose and a driving unit, the alarm mechanism comprises an alarm box, a lifting hook, a connecting rod and an alarm assembly, each alarm assembly comprises a connecting plate, a pressing plate, two first springs and two pressure sensors, the safety hoisting device with the anti-freezing function for building construction can heat a steel wire rope through the heating mechanism, prevent the steel wire rope from being frozen in cold weather and influencing the winding effect, and can give an alarm when hoisted goods are overweight through the alarm mechanism, avoid the goods overweight to lead to equipment to overturn, improved the security of equipment.

Description

A safe type lifting device for building construction has anti-freezing function

Technical Field

The invention relates to the field of building construction, in particular to a safety hoisting device with an anti-freezing function for building construction.

Background

The tower crane is the most common hoisting equipment on the construction site, also called tower crane, and is used for hoisting construction raw materials such as reinforcing steel bars, wood ridges, concrete, steel pipes and the like for construction by the extension (height) of one section and one section (called standard section for short). The tower crane is an indispensable device on a construction site.

When the existing tower crane works in cold weather, the steel wire rope is easily frozen, the steel wire rope cannot be wound, the normal work of the tower crane is influenced, moreover, the existing tower crane hoists goods through the lifting hook, if the goods are too heavy, the lifting arm can be inclined, the tower crane is overturned in serious conditions, the personal safety of operators is threatened, and the safety of equipment is reduced.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: in order to overcome the defects of the prior art, the safe hoisting equipment with the anti-freezing function for building construction is provided.

The invention solves the technical problem by adopting the technical scheme that the safety hoisting equipment with the anti-freezing function for building construction comprises a tower body, a balance arm, a crane boom, a cockpit and a winding device, wherein the balance arm and the crane boom are respectively arranged at two sides above the tower body, the cockpit is fixed on the tower body, the winding device is arranged below the crane boom, P L C is arranged in the cockpit, the safety hoisting equipment also comprises a heating mechanism and an alarm mechanism, and the heating mechanism and the alarm mechanism are both arranged below the winding device;

the heating mechanism comprises a heating chamber, a heating box, a fixing block, two communicating pipes and four air injection assemblies, the heating chamber is fixed on the crane boom, an air vent is arranged above the heating chamber, a fan and a plurality of heating wires are arranged in the heating chamber, the heating wires are uniformly distributed in the heating chamber, the fan is arranged above the heating wires, the heating box is fixed below the crane boom through the fixing block, the heating box is arranged below the wire coiling device, two sides of the heating box are respectively communicated with the heating chamber through the two communicating pipes, through holes are formed in the heating box, and the air injection assemblies are circumferentially and uniformly distributed in the through holes of the heating box;

the air injection assembly comprises a support shaft, a nozzle, a hose and a driving unit, one end of the support shaft is fixedly connected with a through hole of the heating box, the other end of the support shaft is hinged with the nozzle, the nozzle is communicated with the heating box through the hose, and the driving unit is connected with the nozzle;

the winding device is connected with the upper part of the alarm box, a first opening is formed in the lower part of the alarm box, the lifting hook is arranged below the alarm box, the lifting hook is fixedly connected with one end of the connecting rod, the other end of the connecting rod penetrates through the first opening and is arranged in the alarm box, and the alarm assembly is connected with the other end of the connecting rod;

the alarm assembly comprises a connecting plate, a pressing plate, two first springs and two pressure sensors, one end of the connecting rod, far away from the lifting hook, is fixedly connected with the connecting plate, the two first springs are respectively arranged at two ends of the lower part of the connecting plate, two ends of the first springs are respectively connected with the bottom of the alarm box and the lower part of the connecting plate, the pressing plate is fixed at the bottom of the alarm box, a through hole is formed in the pressing plate, the connecting rod penetrates through the through hole, the two pressure sensors are respectively fixed at two ends of the pressing plate, close to one side of the connecting plate, and the pressure sensors are electrically connected with P L C.

As preferred, in order to drive the nozzle swing, drive unit includes dead lever, fixed box, swinging arms, movable plate, electro-magnet, iron plate and second spring, fixed box passes through dead lever and the through-hole fixed connection of heating box, the one side that is close to the nozzle of fixed box is equipped with the second opening, the one end and the nozzle of swinging arms are articulated, the other end of swinging arms passes the inside of second opening setting at fixed box, the other end and the movable plate fixed connection of swinging arms, the iron plate is fixed on the movable plate, the electro-magnet is fixed on the inner wall of the one side of keeping away from the second opening of fixed box, the electro-magnet is just to setting up with the iron plate, and two second springs set up respectively at the both ends of the one side that is close to the electro-magnet of movable plate, the both ends of second spring are fixed box respectively and are kept away from second open-ended one side and are connected with the movable plate, the second spring is in compression state, the electro.

Preferably, in order to limit the moving direction of the moving plate, the driving unit further comprises two limiting rods, two small holes are formed in one side, away from the opening, of the fixing box, the small holes correspond to the limiting rods one to one, one ends of the two limiting rods are fixedly connected with the two ends of the moving plate respectively, the other ends of the limiting rods penetrate through the small holes, the limiting rods are coaxially arranged with the small holes, and the limiting rods are matched with the small holes.

Preferably, in order to avoid the separation of the limiting rod from the small hole, the driving unit further comprises two limiting blocks, the limiting blocks correspond to the limiting rods one to one, and the limiting blocks are fixedly connected with one ends, far away from the moving plate, of the limiting rods.

Preferably, in order to restrict the moving direction of the connecting plate, the alarm assembly further comprises two guide rods, assembly holes are formed in the two ends of the connecting plate, the assembly holes correspond to the guide rods one to one, the two ends of each guide rod are fixedly connected with the top and the bottom of the alarm box respectively, the guide rods penetrate through the assembly holes, and the guide rods and the assembly holes are coaxially arranged.

Preferably, in order to realize the function of hoisting the workpiece, the wire winding device comprises a motor, a rotating shaft and a steel wire rope, the motor is fixed below the crane arm, the motor is in transmission connection with the rotating shaft, one end of the steel wire rope is wound on the rotating shaft, the other end of the steel wire rope penetrates through a through hole of the heating box and is fixedly connected with the upper part of the alarm box, and the motor is electrically connected with the P L C.

Preferably, in order to enable the steel wire rope to be orderly wound on the rotating shaft, the rotating shaft is provided with an annular groove, and the steel wire rope is wound in the annular groove.

Preferably, in order to observe the state of the steel wire rope, a camera is arranged on the heating box, the camera is arranged towards the steel wire rope, and the camera is electrically connected with the P L C.

Preferably, a speaker is provided above the alarm box to realize a prompting function, and the speaker is electrically connected to P L C.

Preferably, in order to improve the intelligence of the equipment, an operation panel is arranged in the cab, a display screen and buttons are arranged on the operation panel, and the display screen and the buttons are electrically connected with the P L C.

The anti-freezing safety hoisting equipment has the advantages that the heating mechanism can be used for heating the steel wire rope, the steel wire rope is prevented from being frozen in cold weather, the coiling effect is prevented from being influenced, compared with the existing heating mechanism, the heating mechanism enlarges the air injection range of the nozzle, the heating effect is improved, the alarm mechanism can give an alarm when the hoisted goods are overweight, the equipment is prevented from overturning due to overweight of the goods, the safety of the equipment is improved, compared with the existing alarm mechanism, the alarm mechanism is high in safety and reliability, and the practicability of the equipment is improved.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic structural diagram of a safety hoisting device with an anti-freezing function for building construction according to the present invention;

FIG. 2 is a schematic structural diagram of an alarm mechanism of the safety hoisting equipment with the anti-freezing function for building construction, provided by the invention;

FIG. 3 is a schematic structural diagram of an air injection assembly of the safety type hoisting equipment with the anti-freezing function for building construction, provided by the invention;

FIG. 4 is an enlarged view of portion A of FIG. 3;

in the figure: 1. the automatic control device comprises a tower body, 2 parts of a cab, 3 parts of a balance arm, 4 parts of a crane arm, 5 parts of a heating chamber, 6 parts of a fan, 7 parts of an electric heating wire, 8 parts of a communicating pipe, 9 parts of a heating box, 10 parts of a hose, 11 parts of a nozzle, 12 parts of a fixing box, 13 parts of an electromagnet, 14 parts of an iron block, 15 parts of a moving plate, 16 parts of a swinging rod, 17 parts of a second spring, 18 parts of a limiting rod, 19 parts of a limiting block, 20 parts of an alarm box, 21 parts of a lifting hook, 22 parts of a connecting rod, 23 parts of a connecting plate, 24 parts of a first spring, 25 parts of a pressing plate, 26 parts of a pressure sensor, 27 parts of a guide rod, 28 parts of a motor, 29 parts of a rotating.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.

As shown in fig. 1, the safety hoisting equipment with the anti-freezing function for building construction comprises a tower body 1, a balance arm 3, a crane boom 4, a cockpit 2 and a winding device, wherein the balance arm 3 and the crane boom 4 are respectively arranged at two sides above the tower body 1, the cockpit 2 is fixed on the tower body 1, the winding device is arranged below the crane boom 4, P L C is arranged in the cockpit 2, and the safety hoisting equipment further comprises a heating mechanism and an alarm mechanism, wherein the heating mechanism and the alarm mechanism are both arranged below the winding device;

p L C, a programmable logic controller, which employs a programmable memory of a type for storing therein a program for executing user-oriented instructions such as logical operations, sequence control, timing, counting, and arithmetic operations, and controlling various types of machines or production processes by digital or analog input/output, is essentially a computer dedicated to industrial control, whose hardware configuration is substantially the same as that of a microcomputer, and is generally used for data processing and instruction reception and output for realizing central control.

This a safe type lifting device for building construction that has anti-freezing function can carry out the heating work to wire rope 30 through heating mechanism, avoids wire rope 30 to be frozen under cold weather, influences the spiral effect, through alarm mechanism, can send the police dispatch newspaper when the hoist and mount goods is overweight, avoids the goods overweight to lead to equipment to overturn, has improved the security of equipment.

As shown in fig. 3, the heating mechanism includes a heating chamber 5, a heating box 9, a fixing block, two communicating pipes 8 and four air injection assemblies, the heating chamber 5 is fixed on the crane boom 4, an air vent is arranged above the heating chamber 5, a fan 6 and a plurality of heating wires 7 are arranged in the heating chamber 5, the heating wires 7 are uniformly distributed in the heating chamber 5, the fan 6 is arranged above the heating wires 7, the heating box 9 is fixed below the crane boom 4 through the fixing block, the heating box 9 is arranged below the winding device, two sides of the heating box 9 are respectively communicated with the heating chamber 5 through the two communicating pipes 8, through holes are arranged on the heating box 9, and the air injection assemblies are circumferentially and uniformly distributed at the through holes of the heating box 9;

the air injection assembly comprises a support shaft, a nozzle 11, a hose 10 and a driving unit, one end of the support shaft is fixedly connected with a through hole of the heating box 9, the other end of the support shaft is hinged with the nozzle 11, the nozzle 11 is communicated with the heating box 9 through the hose 10, and the driving unit is connected with the nozzle 11;

when carrying out heating work, control fan 6 and heating wire 7 start, with the leading-in heating chamber 5 of the external air of heating chamber 5, the air through heating wire 7 heating is through leading-in heating box 9 of communicating pipe 8 in, the rethread hose 10 is leading-in nozzle 11, make nozzle 11 carry out heating work to wire rope 30, avoid wire rope 30 to be frozen under cold weather, influence spiral device work, and simultaneously, control drive unit work, make the swing of nozzle 11 round trip, the jet-propelled scope of nozzle 11 has been enlarged, the heating effect has been promoted.

As shown in fig. 2, the alarm mechanism includes an alarm box 20, a hook 21, a link 22 and an alarm assembly, the wire winding device is connected to the upper portion of the alarm box 20, a first opening is formed below the alarm box 20, the hook 21 is disposed below the alarm box 20, the hook 21 is fixedly connected to one end of the link 22, the other end of the link 22 passes through the first opening and is disposed inside the alarm box 20, and the alarm assembly is connected to the other end of the link 22;

the alarm assembly comprises a connecting plate 23, a pressing plate 25, two first springs 24 and two pressure sensors 26, one end of the connecting rod 22, far away from the lifting hook 21, is fixedly connected with the connecting plate 23, the two first springs 24 are respectively arranged at two ends of the lower portion of the connecting plate 23, two ends of each first spring 24 are respectively connected with the bottom of the alarm box 20 and the lower portion of the connecting plate 23, the pressing plate 25 is fixed at the bottom of the alarm box 20, a through hole is formed in the pressing plate 25, the connecting rod 22 penetrates through the through hole, the two pressure sensors 26 are respectively fixed at two ends of one side, close to the connecting plate 23, of the pressing plate 25, and the pressure sensors 26 are electrically connected with P L C.

When an operator hangs a cargo on the lifting hook 21, the lifting hook 21 is driven to move due to the gravity of the cargo, the connecting rod 22 drives the connecting plate 23 to move towards the direction close to the pressing plate 25, the first spring 24 is compressed, when the connecting plate 23 is in contact with the pressing plate 25, the pressure sensor 26 on the pressing plate 25 detects the pressure applied to the pressing plate 25, if the detected value is larger than the set value, the weight of the cargo exceeds the maximum weight capable of being lifted by the equipment, a signal is sent to the P L C, the P L C controls the loudspeaker 31 to give an alarm sound and stop the equipment to work, the condition that the equipment is overturned due to the overweight of the cargo is avoided, and the safety of the equipment is improved.

As shown in fig. 4, the driving unit includes a fixing rod, a fixing box 12, a swing rod 16, a moving plate 15, an electromagnet 13, an iron block 14 and a second spring 17, the fixing box 12 is fixedly connected to the through hole of the heating box 9 through the fixing rod, one side of the fixing box 12 close to the nozzle 11 is provided with a second opening, one end of the swing rod 16 is hinged to the nozzle 11, the other end of the swing rod 16 passes through the second opening and is disposed inside the fixing box 12, the other end of the swing rod 16 is fixedly connected to the moving plate 15, the iron block 14 is fixed to the moving plate 15, the electromagnet 13 is fixed to the inner wall of the fixing box 12 far away from the second opening, the electromagnet 13 and the iron block 14 are disposed opposite to each other, two second springs 17 are disposed at two ends of the moving plate 15 close to the electromagnet 13, two ends of the second springs 17 are respectively connected to the moving plate 15 and one side of the fixing box 12 far away from the second opening, the second spring 17 is in a compressed state, and the electromagnet 13 is electrically connected to the P35.

When heating work is carried out, the electromagnet 13 is controlled to be electrified to generate a force which is attracted with the iron block 14, the moving plate 15 is enabled to move towards the direction close to the electromagnet 13, meanwhile, the second spring 17 is compressed, the swinging rod 16 is driven to move towards the direction close to the electromagnet 13, the nozzle 11 is driven to swing towards the direction close to the fixed box 12, then, the electromagnet 13 is controlled to be powered off, the iron block 14 is not attracted any more, the moving plate 15 is driven to move towards the direction far away from the electromagnet 13 through the restoring force of the second spring 17, the nozzle 11 is driven to swing towards the direction far away from the fixed box 12 through the swinging rod 16, the nozzle 11 swings back and forth through the power on and off of the electromagnet 13, the air injection range of the nozzle 11 is expanded, and the heating effect.

Preferably, in order to limit the moving direction of the moving plate 15, the driving unit further includes two limiting rods 18, two small holes are formed in one side, away from the opening, of the fixed box 12, the small holes correspond to the limiting rods 18 one to one, one ends of the two limiting rods 18 are respectively fixedly connected with two ends of the moving plate 15, the other ends of the limiting rods 18 penetrate through the small holes, the limiting rods 18 are coaxially arranged with the small holes, and the limiting rods 18 are matched with the small holes.

When the moving plate 15 moves, the limiting rod 18 is driven to move along the axis of the small hole, and the moving direction of the limiting rod 18 is limited, so that the moving plate 15 is more stable when moving.

Preferably, in order to avoid the separation of the limiting rod 18 from the small hole, the driving unit further comprises two limiting blocks 19, the limiting blocks 19 correspond to the limiting rods 18 one to one, and the limiting blocks 19 are fixedly connected with one ends of the limiting rods 18 far away from the moving plate 15.

By arranging the limiting block 19, the moving distance of the limiting rod 18 is limited, and the phenomenon that the limiting rod 18 is separated from the small hole to influence the work of the driving unit is avoided.

Preferably, in order to limit the moving direction of the connecting plate 23, the alarm assembly further comprises two guide rods 27, assembly holes are formed in both ends of the connecting plate 23, the assembly holes correspond to the guide rods 27 one by one, both ends of the guide rods 27 are fixedly connected with the top and the bottom of the alarm box 20 respectively, the guide rods 27 penetrate through the assembly holes, and the guide rods 27 and the assembly holes are coaxially arranged.

By providing the guide bar 27, the moving direction of the link plate 23 is restricted, so that the link plate 23 is more stable when moving.

Preferably, in order to realize the function of hoisting the workpiece, the wire winding device comprises a motor 28, a rotating shaft 29 and a wire rope 30, the motor 28 is fixed below the crane arm 4, the motor 28 is in transmission connection with the rotating shaft 29, one end of the wire rope 30 is wound on the rotating shaft 29, the other end of the wire rope 30 passes through a through hole of the heating box 9 and is fixedly connected with the upper part of the alarm box 20, and the motor 28 is electrically connected with the P L C.

When the goods are hoisted, the motor 28 is controlled to be started, the rotating shaft 29 rotates, the steel wire rope 30 is wound on the rotating shaft 29, and therefore the goods on the lifting hook 21 are driven to ascend, and the hoisting function is achieved.

Preferably, in order to allow the wire rope 30 to be wound around the rotating shaft 29 in order, an annular groove is formed in the rotating shaft 29, and the wire rope 30 is wound around the annular groove.

Preferably, in order to observe the state of the wire rope 30, a camera 32 is provided on the heating box 9, the camera 32 is provided toward the wire rope 30, and the camera 32 is electrically connected to P L C.

Through setting up camera 32, can shoot wire rope 30's picture, if wire rope 30 freezes for heating mechanism work heats work to wire rope 30, avoids wire rope 30 to be frozen under cold weather, influences equipment work.

Preferably, a speaker 31 is provided above the alarm box 20 to realize the prompting function, and the speaker 31 is electrically connected to P L C.

Through setting up speaker 31, when the goods of hoist and mount is overweight, can send the police dispatch newspaper sound, the suggestion operative employee this goods is overweight, unable hoist and mount.

Preferably, in order to improve the intelligence of the device, an operation panel 33 is arranged in the cab 2, a display screen and buttons are arranged on the operation panel 33, and the display screen and the buttons are electrically connected with the P L C.

Through setting up the display screen, can show camera 32 and shoot the picture of wire rope 30, if wire rope 30 freezes, operative employee start button for heating mechanism work carries out heating work to wire rope 30, avoids wire rope 30 to freeze under cold weather, influences equipment work.

By arranging the camera 32, the picture of the steel wire rope 30 can be shot, if the steel wire rope 30 is frozen, the heating mechanism works, the fan 6 and the heating wire 7 are controlled to be started, air outside the heating chamber 5 is guided into the heating chamber 5, the air heated by the heating wire 7 is guided into the heating box 9 through the communicating pipe 8, and then is guided into the nozzle 11 through the hose 10, so that the nozzle 11 heats the steel wire rope 30, the steel wire rope 30 is prevented from being frozen in cold weather, the operation of the wire coiling device is influenced, meanwhile, the electromagnet 13 is controlled to be electrified, a force which is attracted with the iron block 14 is generated, the moving plate 15 moves towards the direction close to the electromagnet 13, meanwhile, the second spring 17 is compressed, the swing rod 16 is driven to move towards the direction close to the electromagnet 13, the nozzle 11 is driven to swing towards the direction far from the fixed box 12, the electromagnet 13 is controlled to be powered off, the iron block 14 is not attracted any more, the electromagnet 15 is driven to move towards the direction far from the fixed box 13 through the restoring force of the second spring 17, the electromagnet 16 drives the nozzle 11 to swing towards the direction far from the fixed box 12, the electromagnet 13 is controlled to be powered off, the power, the electromagnet, the swinging of the nozzle 11, the electromagnet 13 is controlled, the weight, the swinging of the lifting device, the lifting device is controlled, the lifting device is controlled to lift the lifting device, the.

Compared with the prior art, this a safe type lifting device for building construction has anti-freezing function passes through heating mechanism, can carry out heating work to wire rope 30, avoid wire rope 30 to be frozen under cold weather, influence the spiral effect, compare with current heating mechanism, this heating mechanism has enlarged the jet-propelled scope of nozzle 11, the heating effect has been promoted, through alarm mechanism, can send out the police dispatch newspaper when hoist and mount goods are overweight, avoid the goods overweight to lead to equipment to overturn, the security of equipment has been improved, compare with current alarm mechanism, this alarm mechanism fail safe nature is high, the practicality of equipment has been improved.

In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. A safety type hoisting device with an anti-freezing function for building construction comprises a tower body (1), a balance arm (3), a crane boom (4), a cockpit (2), a heating mechanism and a winding device, wherein the balance arm (3) and the crane boom (4) are respectively arranged on two sides above the tower body (1), the cockpit (2) is fixed on the tower body (1), the winding device is arranged below the crane boom (4), and P L C is arranged in the cockpit (2), and the safety type hoisting device is characterized by further comprising an alarm mechanism, wherein the heating mechanism and the alarm mechanism are both arranged below the winding device;

the heating mechanism comprises a heating chamber (5), a heating box (9), a fixed block, two communicating pipes (8) and four air injection components, the heating chamber (5) is fixed on the crane boom (4), a ventilation opening is arranged above the heating chamber (5), a fan (6) and a plurality of electric heating wires (7) are arranged in the heating chamber (5), the electric heating wires (7) are uniformly distributed in the heating chamber (5), the fan (6) is arranged above the electric heating wires (7), the heating box (9) is fixed below the crane arm (4) through a fixing block, the heating box (9) is arranged below the wire coiling device, two sides of the heating box (9) are respectively communicated with the heating chamber (5) through two communicating pipes (8), through holes are formed in the heating box (9), and the air injection assemblies are uniformly distributed at the through holes of the heating box (9) in the circumferential direction;

the air injection assembly comprises a support shaft, a nozzle (11), a hose (10) and a driving unit, one end of the support shaft is fixedly connected with a through hole of the heating box (9), the other end of the support shaft is hinged with the nozzle (11), the nozzle (11) is communicated with the heating box (9) through the hose (10), and the driving unit is connected with the nozzle (11);

the winding device is connected with the upper portion of the alarm box (20), a first opening is formed in the lower portion of the alarm box (20), the lifting hook (21) is arranged below the alarm box (20), the lifting hook (21) is fixedly connected with one end of the connecting rod (22), the other end of the connecting rod (22) penetrates through the first opening and is arranged inside the alarm box (20), and the alarm assembly is connected with the other end of the connecting rod (22);

alarm assembly is including linking board (23), clamp plate (25), two first springs (24) and two pressure sensor (26), the one end of keeping away from lifting hook (21) of connecting rod (22) and linking board (23) fixed connection, two first springs (24) set up respectively at the both ends of linking the below of board (23), the both ends of first spring (24) are connected with the bottom in alarm box (20) and the below of linking board (23) respectively, the bottom in alarm box (20) is fixed in clamp plate (25), be equipped with the perforation on clamp plate (25), connecting rod (22) pass the perforation, and the both ends that are close to one side of linking board (23) at clamp plate (25) are fixed respectively in two pressure sensor (26), pressure sensor (26) are connected with P L C electricity.

2. The safety type hoisting device with the anti-freezing function for building construction according to claim 1, wherein the driving unit comprises a fixed rod, a fixed box (12), a swinging rod (16), a moving plate (15), an electromagnet (13), an iron block (14) and a second spring (17), the fixed box (12) is fixedly connected with the through hole of the heating box (9) through the fixed rod, a second opening is arranged at one side of the fixed box (12) close to the nozzle (11), one end of the swinging rod (16) is hinged to the nozzle (11), the other end of the swinging rod (16) passes through the second opening and is arranged inside the fixed box (12), the other end of the swinging rod (16) is fixedly connected with the moving plate (15), the iron block (14) is fixed on the moving plate (15), the electromagnet (13) is fixed on the inner wall of the fixed box (12) at the side far from the second opening, the electromagnet (13) and the moving plate (14) are arranged right opposite, the two second springs (17) are respectively arranged at one side of the moving plate (15) close to the second opening, and are electrically connected with the second spring (13) at the side of the moving plate (3517), and the second opening is electrically connected with the moving plate (12), and the second spring (25).

3. The safety type hoisting equipment with the anti-freezing function for building construction according to claim 2, wherein the driving unit further comprises two limiting rods (18), one side of the fixing box (12) far away from the opening is provided with two small holes, the small holes correspond to the limiting rods (18) one to one, one ends of the two limiting rods (18) are respectively and fixedly connected with two ends of the moving plate (15), the other end of the limiting rod (18) penetrates through the small holes, the limiting rods (18) and the small holes are coaxially arranged, and the limiting rods (18) are matched with the small holes.

4. The safety type hoisting device with the anti-freezing function for building construction according to claim 3, wherein the driving unit further comprises two limiting blocks (19), the limiting blocks (19) correspond to the limiting rods (18) one by one, and the limiting blocks (19) are fixedly connected with one ends of the limiting rods (18) far away from the movable plate (15).

5. The safety type hoisting device with the anti-freezing function for building construction according to claim 1, wherein the alarm assembly further comprises two guide rods (27), assembling holes are formed in both ends of the connecting plate (23), the assembling holes correspond to the guide rods (27) in a one-to-one manner, both ends of the guide rods (27) are fixedly connected with the top and the bottom in the alarm box (20) respectively, the guide rods (27) penetrate through the assembling holes, and the guide rods (27) and the assembling holes are coaxially arranged.

6. The safety type hoisting equipment with the anti-freezing function for building construction according to claim 1, wherein the wire winding device comprises a motor (28), a rotating shaft (29) and a steel wire rope (30), the motor (28) is fixed below the crane arm (4), the motor (28) is in transmission connection with the rotating shaft (29), one end of the steel wire rope (30) is wound on the rotating shaft (29), the other end of the steel wire rope (30) passes through a through hole of the heating box (9) to be fixedly connected with the upper part of the alarm box (20), and the motor (28) is electrically connected with the P L C.

7. The safety type hoisting device with the anti-freezing function for building construction according to claim 6 is characterized in that the rotating shaft (29) is provided with an annular groove, and the steel wire rope (30) is wound in the annular groove.

8. The safety type hoisting device with the anti-freezing function for building construction according to claim 7 is characterized in that a camera (32) is arranged on the heating box (9), the camera (32) is arranged towards the steel wire rope (30), and the camera (32) is electrically connected with P L C.

9. The safety type hoisting device with the anti-freezing function for building construction according to claim 1 is characterized in that a loudspeaker (31) is arranged above the alarm box (20), and the loudspeaker (31) is electrically connected with P L C.

10. The safety type hoisting equipment with the anti-freezing function for building construction according to claim 1 is characterized in that an operation panel (33) is arranged in the cab (2), a display screen and buttons are arranged on the operation panel (33), and the display screen and the buttons are electrically connected with P L C.