CN214734059U

CN214734059U - Anti-misoperation type emergency release device for lifting appliance

Info

Publication number: CN214734059U
Application number: CN202023272740.0U
Authority: CN
Inventors: 徐裕添; 余浩
Original assignee: Jiangsu Nuclear Power Corp
Current assignee: Jiangsu Nuclear Power Corp
Priority date: 2020-12-30
Filing date: 2020-12-30
Publication date: 2021-11-16
Anticipated expiration: 2030-12-30

Abstract

The utility model belongs to the technical field of hoist and mount, concretely relates to prevent urgent throw-off of maloperation type hoist. The utility model comprises a pin shaft inserting and emergent releasing mechanism and an anti-misoperation mechanism, wherein the pin shaft inserting and emergent releasing mechanism comprises a pull rod bearing seat, a steel wire rope sleeve, an upper pulley support, an upper pulley, a lower pulley support, a lower pulley, a pin penetrating and returning seat spring, a lifting appliance pin shaft, a pull rod, a friction wheel, a switch chain wheel and a switch chain; the misoperation preventing mechanism comprises a chain wheel spiral support, an enabling chain wheel, an enabling chain and an enabling chain wheel return seat spring. The utility model discloses realize separating the crane with hanging the thing fast under the urgent operating mode, hang the thing with the lifting hook can the rapid match and prevent to throw off because of the mistake of people when guaranteeing hoist and mount once more simultaneously.

Description

Anti-misoperation type emergency release device for lifting appliance

Technical Field

The utility model belongs to the technical field of hoist and mount, concretely relates to prevent urgent throw-off of maloperation type hoist.

Background

The operations of sea diving, fishing, road erection, engineering assembly and the like often include some special hoisting operations with large risks, and the operations have large risk of deviation of a lifting hook. In engineering, once such an uncertain deflection occurs, a great deal of accidents are likely to occur, which not only adversely affect the hoisting quality, but also seriously affect the safety of the hoisting machine itself.

For example, when a lifting person uses a crane to lift the marine system and equipment components in the process of cleaning the marine treatment system in a power plant, the lifting person checks that the lifting object is inclined when the lifting object is lifted by half the stroke height, the steel wire rope is separated from the hook head, and the steel wire rope has the sign of wire breakage. Under the working condition, if the operation process has the bad phenomena of inclined pulling, inclined hanging and the like, the load born by the crane is likely to exceed the rated lifting capacity of the crane, the wire breaking degree of the steel wire rope is further expanded, the steel wire rope is likely to break due to the pulling force at any time, and the consequence caused by the breaking of the steel wire rope is very bad. Meanwhile, the area where the hanging object is located is a deep water area, the hanging object is difficult to trip after being placed to a specified position, at the moment, the hanging work is involved in the embarrassment of being difficult to get up and down, and the safety and operability of the hanging work are seriously influenced by the event.

Currently, in engineering practice, some auxiliary slings are usually used for performing such work, and the main purpose of the auxiliary slings in the work is to improve the stability of hoisting. However, these auxiliary spreaders. Emergency release devices have not been designed for the specific case of abandoning hoists to protect the hoisting equipment, and in this case the situation in the above example is likely to occur.

Now, in view of the above problems, it is desirable to provide an anti-malfunction type emergency release device for a spreader.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to the aforesaid is not enough, provides an prevent urgent throw-off of maloperation type hoist to realize separating the crane with hanging the thing fast under the urgent operating mode, hang the thing with the lifting hook can the quick match and prevent to throw off because of the mistake of people when guaranteeing to hoist once more simultaneously, thereby eliminate the lifting hook incline risk that traditional hoist exists at the hoist and mount in-process, then very big improvement this type of hoist and mount operation's factor of safety.

The utility model adopts the technical proposal that:

a false-operation-preventing type emergency release device for a lifting appliance comprises a pin shaft inserting and emergency releasing mechanism and a false-operation-preventing mechanism, wherein the pin shaft inserting and emergency releasing mechanism comprises a pull rod bearing seat, a steel wire rope set, an upper pulley support, an upper pulley, a lower pulley support, a lower pulley, a pin penetrating and returning seat spring, a lifting appliance pin shaft, a pull rod, a friction wheel, a switch chain wheel and a switch chain; the misoperation preventing mechanism comprises a chain wheel spiral support, an enabling chain wheel, an enabling chain and an enabling chain wheel return seat spring.

The pull rod bearing seat is placed in a shell of the lifting appliance, a positioning protruding shoulder is arranged inside the shell, the pull rod bearing seat is in a sliding bearing mode, an oil filling opening is designed in the lifting appliance shell, and necessary maintenance can be carried out on the bearing through the oil filling opening.

The upper pulley support is welded with the hanger shell, and the upper pulley is connected with the upper pulley support into a whole through a hinge; the lower pulley support is welded with the hanger shell, and the lower pulley is connected with the lower pulley support into a whole through a hinge; the pull rod is connected with a bearing in a pull rod bearing seat through transition fit, a hinge hole matched with a steel wire rope set is arranged at the end part of the pull rod, one end of the steel wire rope set is connected with the pull rod, the other end of the steel wire rope set is connected with a lifting appliance pin shaft through a pin shaft return seat spring, and the rotating radius of the pull rod is matched with the stroke of the lifting appliance pin shaft; the friction wheel and the pull rod shaft are welded into a whole, the matching surface of the friction wheel and the pull rod shaft is provided with a channel for increasing the friction force, and the pull rod bearing block has an axial positioning function, so that the friction wheel cannot move in the axial direction; switch sprocket and switch chain cooperation, switch sprocket pass through the axle collar location, can be with the relative rotation of cooperation axle simultaneously, and switch sprocket one side increases there is the friction disc for cooperate with the friction pulley.

The steel wire rope set is an oilless multi-strand steel wire rope.

And a gap is arranged between the friction wheel and the switch chain wheel under the condition of not using.

The chain wheel spiral support is internally provided with a non-self-locking thread, forms a spiral pair with a connecting shaft of a switching chain wheel and an enabling chain wheel, enables a chain to be located on the enabling chain wheel, enables the chain wheel to be located at the end of a shaft through a shaft collar, and simultaneously restricts the enabling chain wheel through a spline, so that the enabling chain wheel cannot rotate relative to the shaft, and the enabling chain wheel return seat spring is in a compressed state outside the shaft and can be jacked open to enable the chain wheel under normal conditions.

The enabling chain wheel return seat spring is a single spring or a multi-layer spring, and the enabling chain wheel return seat spring presses open the enabling chain wheel.

Compared with the prior art, the beneficial effects of the utility model reside in that:

(1) the utility model provides a prevent urgent declutching device of maloperation type hoist, can be fast effectual realization urgent declutching function, for traditional device that utilizes electric element to realize urgent declutching, this device design adopts pure mechanical mechanism, accomplishes urgent declutching action reliability higher;

(2) the utility model provides a prevent urgent throw-off of maloperation type hoist, design and adopt the high dual anti-misoperation structure of reliability, can stop the human error in the use from the equipment level;

(3) the utility model provides a false-action-prevention type emergency release device for a lifting appliance, which has compact structure and can be simultaneously suitable for the matching requirements of large, medium and small lifting appliances;

(4) the utility model provides a false-action-prevention type emergency release device for a lifting appliance, which is lubricated by lubricating grease, convenient to maintain and low in requirement on the use environment;

(5) the utility model provides a prevent maloperation type hoist emergency release device, the quick interface commonality of adoption is strong, the reliability is high, can extensively be applied to all kinds of hoists, has effectively reduced simultaneously and has carried out the degree of difficulty of hoist and mount operation once more after emergency release;

(6) the utility model provides a prevent urgent trip gear of maloperation type hoist, the expansibility of adoption structure is stronger, and the structure that the design adopted not only can be applied to the hoist, also can be used to the urgent trip operation under other forms simultaneously;

(7) the utility model provides a pair of prevent urgent throw-off of maloperation type hoist, the manufacturability is high, and is lower to the requirement of each part, and easy manufacturing, easy assembly has great popularization potentiality.

Drawings

Fig. 1 is a schematic structural view of an anti-misoperation type emergency release device of a spreader;

fig. 2 is a top plan view of a false action prevention type spreader emergency disconnect;

wherein: 1-a pull rod bearing seat; 2, sleeving a steel wire rope; 3-upper pulley support; 4, an upper pulley; 5, a lower pulley support; 6-lower pulley; 7, pin penetrating and seat returning springs; 8-a sling pin shaft; 9-a pull rod; 10-a friction wheel; 11-switching sprocket; 12-switching the chain; 13-sprocket spiral support; 14-enable sprocket; 15-enabling the chain; 16-enable sprocket recoil spring.

Detailed Description

In order to make the technical solution of the present invention better understood by those skilled in the art, the following provides the following figures and embodiments with reference to the present invention to describe and explain the emergency trip device of a spreader with a false operation prevention function in further detail.

As shown in figure 1, the utility model provides an anti-misoperation type emergency release device for a lifting appliance, which mainly comprises a pin shaft insertion and emergency release mechanism and an anti-misoperation mechanism,

wherein: the pin shaft inserting and emergent releasing mechanism comprises a pull rod bearing seat 1, a steel wire rope set 2, an upper pulley support 3, an upper pulley 4, a lower pulley support 5, a lower pulley 6, a pin penetrating and returning seat spring 7, a lifting appliance pin shaft 8, a pull rod 9, a friction wheel 10, a switch chain wheel 11 and a switch chain 12,

the pull rod bearing seat 1 is placed in a shell of the lifting appliance, a positioning shoulder is arranged inside the shell, the cost of the device is reduced, the structure of the device is simplified, the pull rod bearing seat 1 is designed in a sliding bearing mode, an oil filling port is designed in the lifting appliance shell, and necessary maintenance can be carried out on the bearing through the oil filling port.

The steel wire rope set 2, the upper pulley support 3, the upper pulley 4, the lower pulley support 5, the lower pulley 6, the pin penetrating and returning seat spring 7, the lifting appliance pin shaft 8 and the pull rod 9 are respectively arranged in a set from left to right by taking the pull rod bearing seat 1 as a symmetrical center.

The steel wire rope set 2 is an oilless multi-strand steel wire rope.

The upper pulley support 3 is welded with the hanger shell, and the upper pulley 4 is connected with the upper pulley support 3 into a whole through a hinge.

The lower pulley support 5 is welded with the hanger shell, and the lower pulley 6 is connected with the lower pulley support 5 into a whole through a hinge.

The pin penetrating shaft return seat spring 7 and the lifting appliance pin shaft 8 are both arranged in the lifting appliance shell, the spring with better rigidity needs to be selected for the pin transmitting shaft return seat spring 7 in consideration of the conditions of vibration and the like in the working process of the lifting appliance, and the lifting appliance pin shaft 8 is forbidden to be reversely mounted from top to bottom in consideration of easy pin penetrating.

The pull rod 9 is connected with a bearing in the pull rod bearing seat 1 through transition fit. The end part of the pull rod 9 is provided with a hinge hole matched with the steel wire rope set 2, one end of the steel wire rope set 2 is connected with the pull rod 9, the other end of the steel wire rope set 2 is connected with the lifting appliance pin shaft 8 through the pin shaft penetrating and returning seat spring 7, and the rotating radius of the pull rod 9 is matched with the stroke of the lifting appliance pin shaft 8.

The friction wheel 10 and the pull rod shaft are welded into a whole, a groove is formed in the matching surface of the friction wheel 10 and the pull rod shaft to increase friction force, and meanwhile, the friction wheel 10 cannot move in the axial direction because the pull rod bearing seat 1 has an axial positioning effect.

Switch sprocket 11 and switch chain 12 cooperation, switch sprocket 11 passes through the axle collar location, can be with the relative rotation of cooperation axle simultaneously, and 11 one sides of switch sprocket increase has the friction disc for cooperate with friction pulley 10. There is a gap between 10 and 11 in the middle when not in use, see fig. 2

The anti-misoperation mechanism comprises a chain wheel spiral support 13, an enabling chain wheel 14, an enabling chain 15 and an enabling chain wheel return seat spring 16,

the chain wheel spiral support 13 is internally provided with a non-self-locking thread which forms a spiral pair with a connecting shaft of the switching chain wheel 12 and the enabling chain wheel 14, and the inclination angle of the thread should be matched with the rigidity of the enabling chain wheel return seat spring 16 in consideration of the accuracy and the reliability of the movement.

The enabling chain 15 is located on the enabling sprocket 14, the enabling sprocket 14 is located to the end of the shaft through the shaft collar, and the enabling sprocket 14 is restrained by the spline so that the enabling sprocket 14 cannot rotate relative to the shaft.

The enabling sprocket recoil spring 16 is selected as a single spring, and it is contemplated that multiple layers of springs may be selected if greater stiffness is desired, such that the enabling sprocket recoil spring 16 presses the enabling sprocket 14 apart.

The spring is outside the shaft and in a compressed state, normally pushing the enabling sprocket 14 open.

The utility model discloses total 2 operating modes are forced disconnection operating mode and mistake proofing operating mode respectively, and the rotation of operating personnel accessible control enable sprocket 14 carries out the fast switch over of two kinds of operating modes.

1. Forced disconnection regime

The operator A pulls the enabling chain 15 to drive 14 to enable the chain wheel to rotate, the enabling chain wheel 14 is coaxially connected through keys, the shaft can be driven to integrally rotate, the shaft and the chain wheel spiral support 13 form a non-self-locking spiral pair, the shaft rotates inwards to enable the switch chain wheel 11 to press the friction wheel 10, at the moment, the switch chain wheel 11 and the friction wheel 10 are integrated through pressing force, and the operator A keeps pulling the enabling chain 15 to keep the state of tension all the time.

The operator B pulls the switch chain 12 to drive the switch chain wheel 11, and since the switch chain wheel 11 is connected with the chain wheel shaft without a key, the switch chain wheel 11 can rotate relative to the chain wheel shaft, and the switch chain wheel 11 drives the friction wheel 10 to rotate under the pulling of the operator B. Because the friction wheel 10 and the pull rod 9 are welded together, the pull rod 9 rotates around the pull rod bearing seat 1 to drive the steel wire rope set 2 to be tightened, the wire rope set 2 is conducted through the upper pulley 4 and the lower pulley 6 to drive the lifting appliance pin shaft 8 to move inwards, and therefore the lower lifting appliance and the upper lifting appliance are forcibly separated.

2. Malfunction prevention operating mode

Under the compulsory disconnection working condition, operating personnel A loosens the enabling chain 15, enables the sprocket 14 and will be pressed to the outside under the effect that enables the seat spring 16 that returns to thereby make enabling sprocket 14, sprocket shaft and the whole outside promotion of switch sprocket 11 make switch sprocket 11 and friction pulley 10 separately mutually, thereby guarantee personnel can not because the maloperation promptly throw off the hoist by mistake, with the safety of assurance operation process.

It should be noted that under the forced disconnection working condition, the operator a can not loosen the enabling chain 15, and if the operator a loosens the enabling chain 15, the forced disconnection working condition will be automatically switched to the misoperation prevention working condition, so that the hoisting operation cannot be normally continued.

It is to be understood that the above embodiments are merely illustrative of exemplary embodiments that may be employed to illustrate the principles of the present invention, but the present invention is not limited to the above embodiments. Within the scope of professional knowledge possessed by ordinary techniques in the field, the utility model can be modified or replaced by others without departing from the spirit and essence of the utility model, but the technical solution and the improvement thereof without departing from the scope of the utility model should be covered within the scope of the claims of the utility model.

The above description is only the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can substitute or change the technical solution of the present invention and the inventive concept thereof equally within the technical scope disclosed in the present invention, and all the modifications should be covered within the protection scope of the present invention.

Claims

1. The anti-misoperation type emergency tripping device for the lifting appliance is characterized by comprising a pin shaft inserting and emergency tripping mechanism and an anti-misoperation mechanism, wherein the pin shaft inserting and emergency tripping mechanism comprises a pull rod bearing seat, a steel wire rope sleeve, an upper pulley support, an upper pulley, a lower pulley support, a lower pulley, a pin penetrating and returning seat spring, a lifting appliance pin shaft, a pull rod, a friction wheel, a switch chain wheel and a switch chain; the misoperation preventing mechanism comprises a chain wheel spiral support, an enabling chain wheel, an enabling chain and an enabling chain wheel return seat spring.

2. The device of claim 1, wherein the pull rod bearing seat is disposed in a housing of the lifting device, the interior of the pull rod bearing seat is provided with a positioning shoulder, the pull rod bearing seat is in a sliding bearing form, and the lifting device housing is designed with an oil injection port through which necessary maintenance can be performed on the bearing.

3. The anti-misoperation type emergency release device for the lifting appliance according to claim 1, wherein the upper pulley support is welded with the lifting appliance shell, and the upper pulley is integrally connected with the upper pulley support through a hinge; the lower pulley support is welded with the hanger shell, and the lower pulley is connected with the lower pulley support into a whole through a hinge; the pull rod is connected with a bearing in a pull rod bearing seat through transition fit, a hinge hole matched with a steel wire rope set is arranged at the end part of the pull rod, one end of the steel wire rope set is connected with the pull rod, the other end of the steel wire rope set is connected with a lifting appliance pin shaft through a pin shaft return seat spring, and the rotating radius of the pull rod is matched with the stroke of the lifting appliance pin shaft; the friction wheel and the pull rod shaft are welded into a whole, the matching surface of the friction wheel and the pull rod shaft is provided with a channel for increasing the friction force, and the pull rod bearing block has an axial positioning function, so that the friction wheel cannot move in the axial direction; switch sprocket and switch chain cooperation, switch sprocket pass through the axle collar location, can be with the relative rotation of cooperation axle simultaneously, and switch sprocket one side increases there is the friction disc for cooperate with the friction pulley.

4. The emergency release device for a false operation prevention type spreader according to claim 3, wherein the wire rope set is an oil-free multi-strand wire rope.

5. A false-action-prevention type spreader emergency release according to claim 3, wherein there is a gap between the friction wheel and the switch sprocket in the unused condition.

6. The emergency release device of the anti-misoperation type lifting appliance according to claim 1, wherein the spiral support of the chain wheel is internally provided with a non-self-locking thread, a spiral pair is formed by the non-self-locking thread and a connecting shaft of the chain wheel and the switching chain wheel and a connecting shaft of the enabling chain wheel, an enabling chain is positioned on the enabling chain wheel, the enabling chain wheel is positioned at the end part of the shaft through a shaft collar, the enabling chain wheel is restrained by a spline, the enabling chain wheel cannot rotate relative to the shaft, a spring for returning the enabling chain wheel to the support is arranged on the outer side of the shaft and is in a compressed state, and the enabling chain wheel can be pushed open under normal conditions.

7. The device of claim 6, wherein the enabling sprocket return spring is a single spring or a multi-layer spring, and the enabling sprocket return spring presses the enabling sprocket open.