CN114906724A

CN114906724A - Explosion-proof type hoist with spiral arm structure

Info

Publication number: CN114906724A
Application number: CN202210762275.3A
Authority: CN
Inventors: 韩民强; 韩民胜; 徐鹏飞; 胡存立
Original assignee: Henan Province Fada Crane Co ltd
Current assignee: Henan Province Fada Crane Co ltd
Priority date: 2022-06-30
Filing date: 2022-06-30
Publication date: 2022-08-16

Abstract

The invention relates to the technical field of hoisting, in particular to an explosion-proof crane with a swing arm structure, which comprises a rack, a swing arm body, a feeling, a steel wire rope and a lifting hook, wherein the bottom end of the steel wire rope is fixedly connected with a connecting box body, the bottom of the connecting box body is slidably provided with a connecting block, the lifting hook is fixedly arranged at the bottom of the connecting block, the side wall of the connecting box body is provided with a clamping mechanism for clamping a heavy object, and the side wall of the connecting box body is provided with a control mechanism for controlling the lifting hook to move smoothly. According to the invention, the clamping mechanism is arranged, when the lifting mechanism is lifted, the connecting block and the lifting hook move downwards simultaneously due to the gravity of the weight, the movable plate and the auxiliary movable plate deflect inwards under the action of the tension of the third spring, the clamping block on the side wall of the auxiliary movable plate clamps the weight under the elastic force of the first spring sleeved on the first sliding rod and the driving action of the driving assembly, and the friction between the weight and the lifting hook and the shaking of the weight when the weight is moved are reduced.

Description

Explosion-proof crane with spiral arm structure

Technical Field

The invention relates to the technical field of hoisting, in particular to an explosion-proof crane with a swing arm structure.

Background

An explosion-proof crane is a crane type specially used for carrying inflammable and explosive objects as the name implies, is widely used in factories, warehouses and stock yards of chemical engineering units, and is provided with two forms of ground and a driver cab, wherein the driver cab is divided into an open type and a closed type, the installation form is divided into a left side and a right side, and the door-entering direction is divided into a side surface and an end surface for users to select according to respective use conditions.

The rotary arm is fixed on one end of the fixed column of some explosion-proof cranes, the length of the rotary arm is usually fixed, and after the rotary arm is fixed on the ground, the working range of the rotary arm is fixed, and in some special occasions, the rotary arm can be changed in a telescopic way within a certain range to meet different requirements.

In any crane, the lifting hook is arranged on the lifting arm to lift a heavy object, however, the damage of the lifting hook is a common fault in crane equipment, when the crane is used for lifting for a long time, the gravity of the heavy object acts on the joint between the lifting hook and the heavy object, and the internal organization structure of the lifting hook is changed under the action of long-time high tension, so that the lifting hook is easy to crack and the like;

and the friction between the heavy object and the lifting hook also can cause the damage to the lifting hook mouth when rocking, and the lifting hook still uses or often overloads the use because of the carelessness that staff overhauld because of long-term wearing surface reduces and has reached scrap limit standard, causes fatigue failure to lead to the lifting hook fracture, cause the potential safety hazard.

To this end, an explosion-proof crane with a swing arm structure is proposed.

Disclosure of Invention

In order to overcome the above defects in the prior art, an embodiment of the present invention provides an explosion-proof crane with a swing arm structure, and the technical problems to be solved by the present invention are: the crane hook is used for long-time hoisting operation, and the hook is damaged due to the gravity of the heavy object and the friction between the hooks.

In order to achieve the purpose, the invention provides the following technical scheme: an explosion-proof crane with a swing arm structure comprises a rack, a swing arm body, a sensor, a steel wire rope and a lifting hook, wherein the bottom end of the steel wire rope is fixedly connected with a connecting box body, the bottom of the connecting box body is provided with a connecting block in a sliding manner, the lifting hook is fixedly arranged at the bottom of the connecting block, a clamping mechanism for clamping a heavy object is arranged on the side wall of the connecting box body, and a control mechanism for controlling the lifting hook to move smoothly is arranged on the side wall of the connecting box body;

fixture is including articulating the fly leaf that two symmetries on connecting box lateral wall set up, fixedly connected with third spring, two between the inner wall of connecting block and two fly leaves the equal slidable mounting in bottom of fly leaf has vice fly leaf, be equipped with the fixed establishment who is used for injecing the two position between fly leaf and the vice fly leaf, slidable mounting has first slide bar on the lateral wall of vice fly leaf, the one end fixed mounting of first slide bar has the clamp splice, fixed mounting has a plurality of clutch blocks on the lateral wall of clamp splice, the cover is equipped with first spring on the first slide bar, and the both ends difference fixed connection of first spring is on the lateral wall of vice fly leaf and clamp splice, fixed mounting has the mount on the lateral wall of vice fly leaf, be equipped with between first slide bar and the mount and be used for driving the gliding drive assembly of first slide bar.

In a preferred embodiment, the drive assembly comprises a cavity arranged in the connecting box body, a first piston is slidably mounted inside the cavity, a second slide bar is fixedly mounted at the bottom of the first piston, the bottom of the second slide bar penetrates through the bottom of the connecting box body and is slidably mounted on the connecting box body, the bottom of the second slide bar is fixedly connected with the connecting block, a second spring is sleeved on the second slide bar, and two ends of the second spring are respectively fixedly connected to the bottom of the connecting box body and the upper end of the connecting block.

In a preferred embodiment, the bottom of the connecting box body is fixedly provided with two symmetrically arranged air outlet pipes, the two air outlet pipes are fixedly arranged on the side wall of the fixing frame, the air inlet pipe is fixedly arranged on the side wall of the fixing frame, the air inflation spring is fixedly arranged on the inner wall of the fixing frame, the air inlet pipe is communicated with the air inflation spring, and the air outlet pipes are communicated with the air inlet pipe through hoses.

In a preferred embodiment, both of said third springs are angled at 45 ° to the horizontal.

In a preferred embodiment, a first groove is formed in the movable plate, a rack is fixedly mounted on a side wall of the upper end of the auxiliary movable plate, a gear is fixedly mounted in the first groove, the rack and the gear are engaged with each other, and the auxiliary movable plate slides in the first groove.

In a preferred embodiment, the fixing mechanism includes a plurality of second grooves formed in the secondary movable plate, a fourth spring is fixedly connected to inner walls of the plurality of second grooves, another end of the fourth spring is fixedly connected to a buckle, the buckle slides in the second groove, and a plurality of clamping grooves are formed in a side wall of the movable plate.

In a preferred embodiment, the control mechanism comprises two symmetrically-arranged air guide tubes fixedly mounted on the side wall of the connecting box body, a fixing plate is fixedly mounted inside the air guide tubes, a telescopic rod is fixedly mounted on the side wall of the fixing plate, a second piston is fixedly mounted at the output end of the telescopic rod, a fifth spring is sleeved on the telescopic rod, and two ends of the fifth spring are respectively and fixedly connected to the side walls of the fixing plate and the second piston.

In a preferred embodiment, the material of the first slide bar and the second slide bar is tungsten titanium alloy.

Compared with the prior art, the invention has the beneficial effects that:

1. by arranging the clamping mechanism, when a weight is hung on the lifting hook and the lifting hook starts to lift, the connecting block and the lifting hook simultaneously move downwards due to the gravity of the weight, the movable plate and the auxiliary movable plate deflect inwards under the tension of the third spring, the clamping block on the side wall of the auxiliary movable plate clamps the weight under the elastic force of the first spring sleeved on the first sliding rod and the driving action of the driving assembly, so that the friction between the weight and the lifting hook and the shaking of the weight when the weight is moved are reduced, wherein the friction force between the weight and the clamping block can be increased by the friction block, so that the weight cannot be separated from the clamping of the clamping block, when the weight is placed on the ground, the gravity action of the weight on the lifting hook disappears, the tension of the connecting block on the third spring disappears, the movable plate and the auxiliary movable plate reset under the elastic force of the third spring, the clamping force of the clamping block on the weight disappears, and the lifting hook can be separated from the weight, the automatic clamping and separation of the hoisting equipment to the heavy object are realized.

2. According to the invention, through the arrangement of the cavity, the first piston, the second slide bar and other mechanisms, when a heavy object is hung on the lifting hook and lifted, the second slide bar is driven by the connecting block to slide along with the first piston in the cavity, air between the first piston and the cavity is extruded by the first piston from the air outlet pipe to enter the air inlet pipe, so that the inflation spring is inflated to expand and extend, the first slide bar slides on the side walls of the fixed frame and the auxiliary movable plate under the elastic action of the inflation spring to drive the clamping block to move, so that the clamping block is subjected to a pushing force, and the clamping of the clamping block on the heavy object is ensured.

3. During the operating condition, vice fly leaf moves the rack and slides in the inside first recess of fly leaf, under the meshing of rack and gear, vice fly leaf receives the interlock effort of gear, make self gliding speed in first recess can not be too fast, when the length of needs to vice fly leaf is adjusted, the staff manually presses the buckle, make it overcome the spring action of fourth spring and pressed into the inside of second recess from the draw-in groove, the pulling or promote vice fly leaf slides in the inside of fly leaf, thereby adjust, the buckle is fixed vice fly leaf in other draw-in grooves of fourth spring income spring lower card under putting into spring action after adjusting, realize control and adjustment to vice fly leaf distance.

Drawings

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

FIG. 2 is a perspective view of the movable plate of the present invention;

FIG. 3 is a perspective view at the first slide bar of the present invention;

FIG. 4 is a front sectional view of the movable plate of the present invention;

FIG. 5 is an enlarged view of the clamping mechanism of the present invention;

FIG. 6 is an enlarged view of the securing mechanism of the present invention;

fig. 7 is an enlarged view of the control mechanism of the present invention.

In the figure: 1. a frame; 2. a radial arm body; 3. a wire rope; 4. a hook; 5. connecting the box body; 6. connecting blocks; 7. a clamping mechanism; 701. a movable plate; 702. a secondary movable plate; 703. a first slide bar; 704. a clamping block; 705. a first spring; 706. a friction block; 707. a fixed mount; 801. a cavity; 802. a first piston; 803. a second slide bar; 804. a second spring; 805. an air outlet pipe; 806. an air inlet pipe; 807. an inflation spring; 808. a third spring; 9. a fixing mechanism; 901. a first groove; 902. a rack; 903. a second groove; 904. a fourth spring; 905. buckling; 906. a card slot; 907. a gear; 10. a control mechanism; 1001. an air duct; 1002. a fixing plate; 1003. a telescopic rod; 1004. a second piston; 1005. and a fifth spring.

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.

Referring to fig. 1-4, the invention provides an explosion-proof crane with a swing arm structure, which comprises a frame 1, a swing arm body 2, a sensor, a steel wire rope 3 and a lifting hook 4, wherein the bottom end of the steel wire rope 3 is fixedly connected with a connecting box body 5, the bottom of the connecting box body 5 is slidably provided with a connecting block 6, the lifting hook 4 is fixedly arranged at the bottom of the connecting block 6, the side wall of the connecting box body 5 is provided with a clamping mechanism 7 for clamping a heavy object, and the side wall of the connecting box body 5 is provided with a control mechanism 10 for controlling the lifting hook 4 to move smoothly;

the clamping mechanism 7 comprises two symmetrically arranged movable plates 701 hinged on the side wall of the connecting box body 5, a third spring 808 is fixedly connected between the connecting block 6 and the inner walls of the two movable plates 701, auxiliary movable plates 702 are slidably mounted at the bottom ends of the two movable plates 701, a fixing mechanism 9 for limiting the positions of the two

movable plates

701 and 702 is arranged between the

movable plates

701 and 702, a first sliding rod 703 is slidably mounted on the side wall of the auxiliary movable plate 702, a clamping block 704 is fixedly mounted at one end of the first sliding rod 703, a plurality of friction blocks 706 are fixedly mounted on the side wall of the clamping block 704, and a first spring 705 is sleeved on the first sliding rod 703, two ends of the first spring 705 are respectively and fixedly connected to the side walls of the auxiliary moving plate 702 and the clamping block 704, a fixing frame 707 is fixedly installed on one side wall of the auxiliary moving plate 702, and a driving assembly for driving the first sliding rod 703 to slide is arranged between the first sliding rod 703 and the fixing frame 707.

Compared with the prior art, the invention has the advantages that by arranging the clamping mechanism 7, when the hook hangs a heavy object and starts to lift, due to the gravity of the heavy object, the connecting block 6 and the hook 4 simultaneously move downwards, the movable plate 701 and the secondary movable plate 702 deflect inwards under the tension of the third spring 808, the clamping blocks 704 on the side wall of the secondary movable plate 702 clamp the heavy object under the elastic force of the first spring 705 sleeved on the first sliding rod 703 and the driving action of the driving assembly, so that the friction between the heavy object and the hook 4 and the shaking of the heavy object when the heavy object is moved are reduced, the friction block 706 can increase the friction force between the heavy object and the clamping blocks 704, the heavy object cannot be clamped by the clamping blocks 704, when the heavy object is placed on the ground, the gravity action of the heavy object on the hook 4 disappears, the tension of the connecting block 6 on the third spring 808 disappears, the movable plate 701 and the secondary movable plate 702 reset under the elastic force of the third spring 808, the clamping force of the clamping block 704 to the weight disappears, and the hook 4 can be separated from the weight, so that the automatic clamping and separation of the hoisting equipment to the weight are realized.

Referring to fig. 1-4, the driving assembly includes a cavity 801 disposed in the connection box 5, a first piston 802 is slidably mounted inside the cavity 801, a second sliding rod 803 is fixedly mounted at the bottom of the first piston 802, the bottom end of the second sliding rod 803 penetrates through the bottom of the connection box 5 and is slidably mounted on the connection box 5, the bottom end of the second sliding rod 803 is fixedly connected with the connection block 6, a second spring 804 is sleeved on the second sliding rod 803, and two ends of the second spring 804 are respectively fixedly connected to the bottom of the connection box 5 and the upper end of the connection block 6.

In this application embodiment, when the heavy object is unloaded, the second sliding rod 803 automatically moves upward under the action of the pulling force of the second spring 804 when the heavy object is not hung on the hook, so that the pulling force of the third spring 808 on the movable plate 701 automatically disappears, and the lifting operation of workers on other heavy objects is facilitated.

Referring to fig. 1-4, the invention provides an explosion-proof crane with a swing arm structure, wherein two symmetrically arranged air outlet pipes 805 are fixedly installed at the bottom of a connecting box body 5, air inlet pipes 806 are fixedly installed on the side walls of two fixing frames 707, an inflating spring 807 is fixedly installed on the inner wall of the fixing frame 707, the air inlet pipes 806 are communicated with the inflating spring 807, and the air outlet pipes 805 are communicated with the air inlet pipes 806 through hoses.

In the embodiment of the present invention, when the hook 4 hangs a heavy object and lifts, the second sliding rod 803 is driven by the connecting block 6 to slide along with the first piston 802 inside the cavity 801, air between the first piston 802 and the cavity 801 is pressed by the first piston 802 from the air outlet tube 805 into the air inlet tube 806, so as to inflate the inflating spring 807 to expand and extend, the first sliding rod 703 slides on the side walls of the fixing frame 707 and the secondary movable plate 702 under the elastic force of the inflating spring 807, so as to drive the clamping block 704 to move, so that the clamping block 704 receives a pushing force, and the clamping of the clamping block 704 on the heavy object is ensured.

Referring to fig. 2 and 3, the two third springs 808 are both at an angle of 45 ° to the horizontal.

In this application embodiment, pass through third spring 808 elastic connection between connecting block 6 and the fly leaf 701 for the staff can adjust vice fly leaf 702 to the heavy object of different volumes, is convenient for to the hoist and mount of different specification heavy objects, establishes the contained angle between third spring 808 and the level line to 45, can ensure that connecting block 6 when the removal the pulling force of third spring 808 can drive the deflection of fly leaf 701.

Referring to fig. 2, 3 and 5, a first groove 901 is formed in the movable plate 701, a rack 902 is fixedly mounted on a side wall of an upper end of the secondary movable plate 702, a gear 907 is fixedly mounted in the first groove 901, the rack 902 and the gear 907 are engaged with each other, and the secondary movable plate 702 slides in the first groove 901.

In the embodiment of the application, in the working state, the secondary moving plate 702 drives the rack 902 to slide in the first groove 901 inside the moving plate 701, and under the engagement between the rack 902 and the gear 907, the secondary moving plate 702 receives the meshing action force of the gear 907, so that the sliding speed of the secondary moving plate 702 in the first groove 901 is not too fast, and the device is protected.

Referring to fig. 5, the fixing mechanism 9 includes a plurality of second grooves 903 formed in the secondary movable plate 702, a fourth spring 904 is fixedly connected to inner walls of the plurality of second grooves 903, another end of the fourth spring 904 is fixedly connected to a buckle 905, the buckle 905 slides in the second groove 903, and a plurality of locking grooves 906 are formed in a side wall of the movable plate 701.

In this application embodiment, during operation, when the length of vice fly leaf 702 needs to be adjusted, the staff manually presses buckle 905, make it overcome the elastic force effect of fourth spring 904 and be pressed into the inside of second recess 903 from draw-in groove 906, the pulling or promote vice fly leaf 702 and slide in the inside of fly leaf 701, thereby adjust, buckle 905 fixes vice fly leaf 702 in other draw-in grooves 906 are gone into to the card under the elastic force effect is put into to fourth spring 904 after adjusting, the realization is to the control and the adjustment of vice fly leaf 702 distance.

Referring to fig. 3 and 6, the control mechanism 10 includes two air ducts 1001 which are symmetrically arranged and fixedly mounted on the side wall of the connection box 5, a fixing plate 1002 is fixedly mounted inside the air ducts 1001, an expansion link 1003 is fixedly mounted on the side wall of the fixing plate 1002, a second piston 1004 is fixedly mounted at the output end of the expansion link 1003, a fifth spring 1005 is sleeved on the expansion link 1003, and two ends of the fifth spring 1005 are respectively and fixedly connected to the side walls of the fixing plate 1002 and the second piston 1004.

In the embodiment of the present invention, by providing the fixing plate 1002, the telescopic rod 1003, the second pistons 1004, the fifth spring 1005, and other mechanisms, and the installation directions of the devices connected to the two sides of the case 5 are the same, when the first piston 802 slides in the cavity 801, one of the second pistons 1004 breaks the sealing property of the upper end of the cavity 801, so that the first piston 802 smoothly moves downwards, the other second piston 1004 is closed, and when the first piston 802 moves upwards, the working states of the two second pistons 1004 are opposite to the previous state, thereby ensuring that the first piston 802 can smoothly move upwards.

Referring to fig. 3, the material of the first slide bar 703 and the second slide bar 803 is tungsten-titanium alloy.

In the embodiment of the application, the tungsten-titanium alloy has a series of excellent performances such as high hardness, wear resistance, good strength and toughness, heat resistance, corrosion resistance and the like, so that the first sliding rod 703 and the second sliding rod 803 cannot be easily damaged due to friction when sliding, the replacement of rod pieces is reduced, and resources are saved.

The working principle is as follows: when the length of the secondary movable plate 702 needs to be adjusted during work, a worker manually presses the buckle 905 to enable the buckle to be pressed into the second groove 903 from the clamping groove 906 by overcoming the elastic force of the fourth spring 904, pulls or pushes the secondary movable plate 702 to slide in the movable plate 701, so as to perform adjustment, the adjusted buckle 905 is placed into the other clamping groove 906 by the fourth spring 904 under the elastic force to fix the secondary movable plate 702, in a working state, the secondary movable plate 702 drives the rack 902 to slide in the first groove 901 in the movable plate 701, under the meshing of the rack 902 and the gear 907, the secondary movable plate 702 is subjected to the meshing force of the gear 907, so that the speed of sliding in the first groove 901 cannot be too fast, when a weight is hung on the hook and the weight starts to be lifted, the connecting block 6 and the hook 4 simultaneously move downwards due to the gravity of the weight, the movable plates 701 and the secondary movable plate 702 deflect inwards under the pulling force of the third spring 808, the clamping block 704 on the side wall of the secondary movable plate 702 clamps the heavy object under the elastic force of the first spring 705 sleeved on the first sliding rod 703 and the driving action of the driving assembly, so as to reduce the friction between the heavy object and the hook 4 and the shaking of the heavy object when the heavy object is moved, wherein the friction block 706 can increase the friction force between the heavy object and the clamping block 704, so that the heavy object cannot be separated from the clamping of the clamping block 704, when the heavy object is placed on the ground, the gravity action of the heavy object on the hook 4 disappears, the pulling force of the connecting block 6 on the third spring 808 disappears, the movable plate 701 and the secondary movable plate 702 return under the elastic force of the third spring 808, the clamping force of the clamping block 704 on the heavy object disappears, the hook 4 can be separated from the heavy object, when the hook 4 hangs and lifts the heavy object, the second sliding rod 803 with the first piston 802 sliding in the cavity 801 under the driving of the connecting block 6, the air between the first piston 802 and the cavity 801 can be pressed into the air inlet pipe 806 from the air outlet pipe 805 by the first piston 802, further, the inflation spring 807 is inflated to expand and extend, the first sliding rod 703 slides on the side walls of the fixed frame 707 and the secondary movable plate 702 under the elastic force of the inflation spring 807, and further drives the clamp block 704 to move, so that the clamp block 704 receives a pushing force, the installation directions of the fixed plate 1002, the telescopic rod 1003, the second piston 1004, the fifth spring 1005 and other mechanisms connected to the two sides of the box 5 are the same, when the first piston 802 slides in the cavity 801, one of the second pistons 1004 is broken by the sealing property of the upper end of the cavity 801, so that the first piston 802 smoothly moves downwards, the other second piston 1004 is closed, and when the first piston 802 moves upwards, the working states of the two second pistons 1004 are opposite to the previous state, so that the first piston 802 can smoothly move upwards.

The points to be finally explained are: first, in the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounted," "connected," and "connected" should be understood broadly, and may be a mechanical connection or an electrical connection, or a communication between two elements, and may be a direct connection, and "upper," "lower," "left," and "right" are only used to indicate a relative positional relationship, and when the absolute position of the object to be described is changed, the relative positional relationship may be changed;

secondly, the method comprises the following steps: in the drawings of the disclosed embodiments of the invention, only the structures related to the disclosed embodiments are referred to, other structures can refer to common designs, and the same embodiment and different embodiments of the invention can be combined with each other without conflict;

and finally: the above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that are within the spirit and principle of the present invention are intended to be included in the scope of the present invention.

Claims

1. The utility model provides an explosion-proof type hoist with radial arm structure, includes frame (1), radial arm body (2), impression, wire rope (3), lifting hook (4), its characterized in that: the bottom end of the steel wire rope (3) is fixedly connected with a connecting box body (5), the bottom of the connecting box body (5) is provided with a connecting block (6) in a sliding mode, the lifting hook (4) is fixedly installed at the bottom of the connecting block (6), the side wall of the connecting box body (5) is provided with a clamping mechanism (7) used for clamping a heavy object, and the side wall of the connecting box body (5) is provided with a control mechanism (10) used for controlling the lifting hook (4) to move smoothly;

the clamping mechanism (7) comprises two symmetrically-arranged movable plates (701) hinged to the side wall of the connecting box body (5), a third spring (808) is fixedly connected between the connecting block (6) and the inner walls of the two movable plates (701), an auxiliary movable plate (702) is slidably mounted at the bottom ends of the two movable plates (701), a fixing mechanism (9) used for limiting the positions of the movable plate (701) and the auxiliary movable plate (702) is arranged between the movable plate (701) and the auxiliary movable plate (702), a first sliding rod (703) is slidably mounted on the side wall of the auxiliary movable plate (702), a clamping block (704) is fixedly mounted at one end of the first sliding rod (703), a plurality of friction blocks (706) are fixedly mounted on the side wall of the clamping block (704), a first spring (705) is sleeved on the first sliding rod (703), and two ends of the first spring (705) are fixedly connected to the side walls of the auxiliary movable plate (702) and the clamping block (704) respectively, a fixed frame (707) is fixedly mounted on one side wall of the auxiliary movable plate (702), and a driving assembly for driving the first sliding rod (703) to slide is arranged between the first sliding rod (703) and the fixed frame (707).

2. An explosion-proof crane with a radial arm structure as claimed in claim 1, wherein: drive assembly is including locating cavity (801) of connecting box (5), the inside slidable mounting of cavity (801) has first piston (802), the bottom fixed mounting of first piston (802) has second slide bar (803), the bottom and the slidable mounting of the bottom through connection box (5) of second slide bar (803) are on connecting box (5), and the bottom and connecting block (6) fixed connection of second slide bar (803), second spring (804) have been cup jointed on second slide bar (803), and the both ends difference fixed connection of second spring (804) is in the bottom of connecting box (5) and the upper end of connecting block (6).

3. An explosion-proof crane with a radial arm structure as claimed in claim 1, wherein: the bottom fixed mounting of connecting box (5) has outlet duct (805) that two symmetries set up, two equal fixed mounting has intake pipe (806) on the lateral wall of mount (707), fixed mounting has inflatable spring (807) on the inner wall of mount (707), intake pipe (806) and inflatable spring (807) communicate each other, communicate through the hose between outlet duct (805) and the intake pipe (806).

4. An explosion-proof crane with a radial arm structure as claimed in claim 1, wherein: the included angles between the two third springs (808) and the horizontal line are both 45 degrees.

5. An explosion-proof crane with a radial arm structure as claimed in claim 1, wherein: the inner part of the movable plate (701) is provided with a first groove (901), a rack (902) is fixedly mounted on the side wall of the upper end of the auxiliary movable plate (702), a gear (907) is fixedly mounted in the first groove (901), the rack (902) and the gear (907) are meshed with each other, and the auxiliary movable plate (702) slides in the first groove (901).

6. An explosion-proof crane with a radial arm structure as claimed in claim 1, wherein: fixed establishment (9) are including seting up a plurality of second recess (903) at vice fly leaf (702) inside, and are a plurality of equal fixedly connected with fourth spring (904) on the inner wall of second recess (903), the other end fixedly connected with buckle (905) of fourth spring (904), and buckle (905) slide in the inside of second recess (903), a plurality of draw-in grooves (906) have been seted up on the lateral wall of fly leaf (701).

7. An explosion-proof crane with a radial arm structure as claimed in claim 1, wherein: control mechanism (10) are including two air ducts (1001) that the symmetry set up of fixed mounting on connecting box (5) lateral wall, the inside fixed mounting of air duct (1001) has fixed plate (1002), fixed mounting has telescopic link (1003) on the lateral wall of fixed plate (1002), the output fixed mounting of telescopic link (1003) has second piston (1004), fifth spring (1005) has been cup jointed on telescopic link (1003), and the both ends difference fixed connection of fifth spring (1005) is on the lateral wall of fixed plate (1002) and second piston (1004).

8. An explosion-proof crane with a radial arm structure as claimed in claim 2, wherein: the first sliding rod (703) and the second sliding rod (803) are made of tungsten-titanium alloy.