An emergency release device for anti-misoperation type sling

Abstract

The present invention belongs to the field of hoisting technology, and specifically relates to an emergency disengagement device for hoisting equipment with an anti-misoperation type. The present invention includes a pin shaft insertion and emergency disengagement mechanism and an anti-misoperation mechanism. The pin shaft insertion and emergency disengagement mechanism includes a pull rod bearing seat, a wire rope set, an upper pulley support, an upper pulley, a lower pulley support, a lower pulley, a pin return spring, a hoisting equipment pin shaft, a pull rod, a friction wheel, a switch sprocket and a switch chain. The wire rope set, the upper pulley support, the upper pulley, the lower pulley support, the lower pulley, the pin return spring, the hoisting equipment pin shaft, and the pull rod are arranged with the pull rod bearing seat as the symmetry center, and one set is arranged on the left and right; the anti-misoperation mechanism includes a sprocket spiral support, an enabling sprocket, an enabling chain and an enabling sprocket return spring. The present invention can quickly separate the crane and the hoisted object under emergency conditions, and at the same time ensure that the hoisted object and the hook can be quickly matched when hoisting again and prevent accidental disengagement due to human error.

Description

Technical Field

[0001] The invention belongs to the technical field of hoisting, and in particular relates to an emergency release device for hoisting equipment that prevents misoperation. Background Art

[0002] In the operations of underwater salvage, road construction, engineering assembly, etc., there are often some special and risky lifting operations, which have a greater risk of hook deflection. In the project, once such uncertain deflection occurs, it is likely to cause a huge accident, which will not only have an adverse effect on the lifting quality, but also seriously affect the safety of the lifting machinery itself.

[0003] For example, during the cleaning of the offshore processing system of a power plant, the lifting personnel used a crane to lift the offshore system and equipment components. When the load was lifted to half the travel height, they found that the load had tilted, the wire rope had come out of the hook, and the wire rope had broken. Under such conditions, if there are undesirable phenomena such as crooked pulling and slanting during the operation, the load borne by the crane is likely to exceed the rated lifting capacity of the crane. At this time, the degree of wire rope breakage will be further increased, and the wire rope may break at any time due to the tension. The consequences of wire rope breakage are very severe. At the same time, the area where the load is located is a deep water area. When the load is lowered to the designated position, it is difficult to disengage. At this time, the lifting work will fall into a dilemma of being difficult to go up and down, which will seriously affect the safety and operability of the lifting work.

[0004] At present, some auxiliary slings are often used in engineering practice to perform such work. The main purpose of auxiliary slings in these works is to improve the stability of lifting. However, these auxiliary slings are not designed with emergency release devices to abandon the lifting objects in special circumstances to protect the lifting equipment. At this time, the above-mentioned situation is likely to occur.

[0005] Now, in view of the above problems, it is urgent to provide an anti-maloperation type lifting device emergency release device. Summary of the invention

[0006] The purpose of the present invention is to provide an anti-misoperation type sling emergency disengagement device to address the above-mentioned deficiencies, so as to achieve rapid separation of the crane and the load under emergency conditions, while ensuring that the load and the hook can be quickly matched during re-hoisting and preventing accidental disengagement due to human error, thereby eliminating the risk of hook deflection in the lifting process of traditional slings, and greatly improving the safety factor of such lifting operations.

[0007] The technical solution adopted by the present invention is:

[0008] A device for emergency release of an anti-maloperation type sling comprises a pin shaft insertion and emergency release mechanism and an anti-maloperation mechanism. The pin shaft insertion and emergency release mechanism comprises a pull rod bearing seat, a wire rope set, an upper pulley support, an upper pulley, a lower pulley support, a lower pulley, a pin return spring, a sling pin shaft, a pull rod, a friction wheel, a switch sprocket and a switch chain. The wire rope set, the upper pulley support, the upper pulley, the lower pulley support, the lower pulley, the pin return spring, the sling pin shaft and the pull rod are arranged with the pull rod bearing seat as the symmetry center, with one set on each side; the anti-maloperation mechanism comprises a sprocket spiral support, an enabling sprocket, an enabling chain and an enabling sprocket return spring.

[0009] The tie rod bearing seat is placed in the shell of the spreader, and a positioning shoulder is opened inside. The tie rod bearing seat adopts a sliding bearing form. At the same time, the spreader shell is designed with an oil filling port, through which necessary maintenance can be performed on the bearing.

[0010] The upper pulley support is welded together with the sling housing, and the upper pulley is connected to the upper pulley support as a whole through a hinge; the lower pulley support is welded together with the sling housing, and the lower pulley is connected to the lower pulley support as a whole through a hinge; the pull rod is connected to the bearing in the pull rod bearing seat through a transition fit, and a reaming hole matching the wire rope set is arranged at the end of the pull rod, one end of the wire rope set is connected to the pull rod, and the other end is connected to the sling pin shaft through a pin shaft return spring, and the rotation radius of the pull rod matches the stroke of the sling pin shaft; the friction wheel is welded together with the pull rod shaft, and a groove is opened on the matching surface of the friction wheel and the pull rod shaft to increase the friction force. At the same time, because the pull rod bearing seat has an axial positioning function, the friction wheel will not move in the axial direction; the switch sprocket cooperates with the switch chain, and the switch sprocket is positioned by the shaft ring and can rotate relative to the matching shaft. A friction plate is added to one side of the switch sprocket to cooperate with the friction wheel.

[0011] The steel wire rope assembly is made of oil-free multi-strand steel wire rope.

[0012] There is a gap between the friction wheel and the switch sprocket when they are not in use.

[0013] The sprocket spiral support is provided with a non-self-locking thread inside, and forms a spiral pair with the connecting shaft of the switch sprocket and the enabling sprocket. The enabling chain is located on the enabling sprocket, and the enabling sprocket is positioned to the end of the shaft through the shaft ring. At the same time, the enabling sprocket is constrained by the spline so that the enabling sprocket cannot rotate relative to the shaft. The enabling sprocket return seat spring is on the outside of the shaft and is in a compressed state. Under normal circumstances, the enabling sprocket can be pushed open.

[0014] The enabling sprocket return seat spring is a single spring or a multi-layer spring, and the enabling sprocket return seat spring presses the enabling sprocket open.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] (1) The present invention provides an anti-misoperation type sling emergency release device, which can quickly and effectively realize the emergency release function. Compared with the traditional device that uses electrical components to realize emergency release, the device is designed to use a pure mechanical mechanism, and the reliability of completing the emergency release action is higher;

[0017] (2) The present invention provides an anti-misoperation type sling emergency release device, which is designed with a highly reliable double anti-misoperation structure, and can eliminate human errors during use at the equipment level;

[0018] (3) The present invention provides an anti-misoperation type sling emergency release device, which has a compact structure and can be applied to the coordination requirements of large, medium and small slings;

[0019] (4) The present invention provides an anti-misoperation type sling emergency release device, which is lubricated with grease, is easy to maintain, and has low requirements on the use environment;

[0020] (5) The invention provides an anti-misoperation type lifting equipment emergency release device, which adopts a quick interface with strong versatility and high reliability, and can be widely used in various types of lifting equipment, while effectively reducing the difficulty of re-lifting operations after emergency release;

[0021] (6) The present invention provides an anti-misoperation type sling emergency release device, which has a strong structural scalability. The designed structure can be applied not only to slings, but also to emergency release operations in other forms;

[0022] (7) The anti-misoperation type sling emergency release device provided by the present invention has high processability, low requirements for various components, is easy to manufacture and assemble, and has great promotion potential. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of an emergency release device for a sling that prevents misoperation;

[0024] Figure 2 It is a top view of an emergency release device for spreaders that prevents misoperation;

[0025] Among them: 1—pull rod bearing seat; 2—wire rope set; 3—upper pulley support; 4—upper pulley; 5—lower pulley support; 6—lower pulley; 7—pin return spring; 8—hanging device pin shaft; 9—pull rod; 10—friction wheel; 11—switch sprocket; 12—switch chain; 13—sprocket spiral support; 14—enabling sprocket; 15—enabling chain; 16—enabling sprocket return spring. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the technical solution of the present invention, an anti-maloperation type sling emergency release device of the present invention is further described and illustrated in detail below in conjunction with the accompanying drawings and embodiments.

[0027] like Figure 1 As shown, the present invention provides an anti-misoperation type sling emergency release device, which mainly includes a pin shaft insertion and emergency release mechanism, an anti-misoperation mechanism,

[0028] The pin insertion and emergency release mechanism includes a pull rod bearing seat 1, a wire rope set 2, an upper pulley support 3, an upper pulley 4, a lower pulley support 5, a lower pulley 6, a pin return spring 7, a hanger pin 8, a pull rod 9, a friction wheel 10, a switch sprocket 11 and a switch chain 12.

[0029] The tie rod bearing seat 1 is placed in the shell of the sling, and a positioning shoulder is opened inside. Considering reducing the cost of the device and simplifying the device structure, the tie rod bearing seat 1 is designed in the form of a sliding bearing. At the same time, the sling shell is designed with an oil filling port, through which necessary maintenance of the bearing can be carried out.

[0030] The wire rope assembly 2, the upper pulley support 3, the upper pulley 4, the lower pulley support 5, the lower pulley 6, the pin return spring 7, the hanger pin shaft 8, and the pull rod 9 are arranged in one set on the left and right sides with the pull rod bearing seat 1 as the symmetry center.

[0031] Wire rope set 2 uses oil-free multi-strand wire rope.

[0032] The upper pulley support 3 is welded to the sling housing, and the upper pulley 4 is connected to the upper pulley support 3 as a whole through a hinge.

[0033] The lower pulley support 5 is welded to the sling housing, and the lower pulley 6 is connected to the lower pulley support 5 as a whole through a hinge.

[0034] The pin shaft return spring 7 and the hanger pin shaft 8 are both installed in the hanger housing. Considering the vibration during the operation of the hanger, the pin shaft return spring 7 needs to be a spring with better rigidity. At the same time, considering the easy pin insertion, the hanger pin shaft 8 is prohibited from being installed upside down.

[0035] The pull rod 9 is connected to the bearing in the pull rod bearing seat 1 through a transition fit. The end of the pull rod 9 is arranged with a reamer hole that matches the wire rope set 2. One end of the wire rope set 2 is connected to the pull rod 9, and the other end is connected to the hanger pin 8 through the pin shaft return spring 7. The rotation radius of the pull rod 9 matches the stroke of the hanger pin 8.

[0036] The friction wheel 10 is welded to the tie rod shaft as a whole, and grooves are provided on the mating surfaces of the friction wheel 10 and the tie rod shaft to increase the friction force. At the same time, because the tie rod bearing seat 1 has an axial positioning function, the friction wheel 10 will not move in the axial direction.

[0037] The switch sprocket 11 cooperates with the switch chain 12. The switch sprocket 11 is positioned by the shaft ring and can rotate relative to the matching shaft. A friction plate is added to one side of the switch sprocket 11 to cooperate with the friction wheel 10. There is a gap between 10 and 11 when they are not in use. Figure 2

[0038] The anti-maloperation mechanism includes a sprocket spiral support 13, an enabling sprocket 14, an enabling chain 15 and an enabling sprocket return spring 16.

[0039] The sprocket spiral support 13 has a non-self-locking thread inside, forming a spiral pair with the connecting shaft of the switch sprocket 12 and the enabling sprocket 14. Considering the accuracy and reliability of the movement, the thread inclination should match the stiffness of the enabling sprocket return spring 16.

[0040] The enabling chain 15 is located on the enabling sprocket 14, and the enabling sprocket 14 is positioned to the end of the shaft through a shaft ring. At the same time, the enabling sprocket 14 is constrained by a spline so that the enabling sprocket 14 cannot rotate relative to the shaft.

[0041] The enabling sprocket return seat spring 16 is a single spring. If a greater rigidity is required, a multi-layer spring can be considered to be selected. The enabling sprocket return seat spring 16 presses the enabling sprocket 14 open.

[0042] The spring is on the outside of the shaft and is in a compressed state, and can push open the enabling sprocket 14 under normal circumstances.

[0043] The present invention has two working conditions, namely a forced disconnection condition and an anti-misoperation condition. The operator can quickly switch between the two working conditions by controlling the rotation of the enabling sprocket 14.

[0044] 1. Forced disconnection condition

[0045] Operator A pulls the enabling chain 15 to drive the enabling sprocket 14 to rotate. Since the enabling sprocket 14 is coaxially connected by a key, it can drive the entire shaft to rotate. Since the shaft and the sprocket spiral support 13 form a non-self-locking spiral pair, the shaft rotates inward to cause the switch sprocket 11 to press the friction wheel 10. At this time, the switch sprocket 11 and the friction wheel 10 form a whole due to the pressing force. In this case, operator A keeps pulling the enabling chain 15 to keep it in a taut state.

[0046] Operator B pulls the switch chain 12 to drive the switch sprocket 11. Since the switch sprocket 11 is not keyed to the sprocket shaft, the switch sprocket 11 can rotate relative to the sprocket shaft. Therefore, under the pull of operator B, the switch sprocket 11 drives the friction wheel 10 to rotate. Since the friction wheel 10 is welded to the pull rod 9, the pull rod 9 rotates around the pull rod bearing seat 1, driving the wire rope set 2 to tighten. The wire rope set 2 is transmitted through the upper pulley 4 and the lower pulley 6, driving the hanger pin 8 to move inward, so that the lower hanger is forced to be disengaged from the upper hanger.

[0047] 2. Anti-maloperation working conditions

[0048] Under the forced disconnection condition, operator A loosens the enabling chain 15, and the enabling sprocket 14 will be pressed outward under the action of the enabling return spring 16, so that the enabling sprocket 14, the sprocket shaft and the switch sprocket 11 are pushed outward as a whole, so that the switch sprocket 11 is separated from the friction wheel 10, thereby ensuring that personnel will not mistakenly disengage the sling in an emergency due to misoperation, thereby ensuring the safety of the operation process.

[0049] It should be noted that, under the forced disconnection condition, operator A cannot loosen the enabling chain 15. If operator A loosens the enabling chain 15, the forced disconnection condition will automatically switch to the anti-misoperation condition, thereby causing the lifting operation to be unable to continue normally.

[0050] It is understood that the above embodiments are only exemplary embodiments used 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 technicians in this field, the present invention can be modified or replaced by equivalents without departing from the spirit and essence of the present invention, but the technical solutions and improvements that do not depart from the scope of the present invention should be included in the scope of the claims of the present invention.

[0051] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the art who, within the technical scope disclosed by the present invention, makes equivalent substitutions or changes based on the technical scheme and inventive concept of the present invention should be covered within the protection scope of the present invention.

Claims

1. An anti-maloperation type sling emergency release device, characterized in that: It includes a pin shaft insertion and emergency disengagement mechanism and an anti-maloperation mechanism. The pin shaft insertion and emergency disengagement mechanism includes a pull rod bearing seat, a wire rope set, an upper pulley support, an upper pulley, a lower pulley support, a lower pulley, a pin return spring, a sling pin shaft, a pull rod, a friction wheel, a switch sprocket and a switch chain. The wire rope set, the upper pulley support, the upper pulley, the lower pulley support, the lower pulley, the pin return spring, the sling pin shaft and the pull rod are arranged with the pull rod bearing seat as the symmetry center, and one set is arranged on the left and right; the anti-maloperation mechanism includes a sprocket spiral support, an enabling sprocket, an enabling chain and an enabling sprocket return spring; the pull rod bearing seat is placed in the shell of the sling, and a positioning shoulder is opened inside. The pull rod bearing seat adopts a sliding bearing form. At the same time, the sling shell is designed with an oil filling port, through which the necessary maintenance of the bearing can be performed; the upper pulley support is welded to the sling shell, and the upper sliding The wheel is connected to the upper pulley support through a hinge; the lower pulley support is welded to the outer shell of the sling, and the lower pulley is connected to the lower pulley support through a hinge; the pull rod is connected to the bearing in the pull rod bearing seat through a transition fit, and a reaming hole matching the wire rope set is arranged at the end of the pull rod. One end of the wire rope set is connected to the pull rod, and the other end is connected to the sling pin shaft through a through pin return spring. The rotation radius of the pull rod matches the stroke of the sling pin shaft; the friction wheel is welded to the pull rod shaft as a whole, and grooves are opened on the matching surfaces of the friction wheel and the pull rod shaft to increase friction. At the same time, because the pull rod bearing seat has an axial positioning function, the friction wheel will not move in the axial direction; the switch sprocket cooperates with the switch chain, and the switch sprocket is positioned by the shaft ring and can rotate relative to the matching shaft. A friction plate is added to one side of the switch sprocket to cooperate with the friction wheel.

2. The anti-maloperation type sling emergency release device according to claim 1, characterized in that: The steel wire rope assembly is made of oil-free multi-strand steel wire rope.

3. The anti-maloperation type sling emergency release device according to claim 1, characterized in that: There is a gap between the friction wheel and the switch sprocket when they are not in use.

4. The anti-maloperation type sling emergency release device according to claim 1, characterized in that: The sprocket spiral support is provided with a non-self-locking thread inside, and forms a spiral pair with the connecting shaft of the switch sprocket and the enabling sprocket. The enabling chain is located on the enabling sprocket, and the enabling sprocket is positioned to the end of the shaft through the shaft ring. At the same time, the enabling sprocket is constrained by the spline so that the enabling sprocket cannot rotate relative to the shaft. The enabling sprocket return seat spring is on the outside of the shaft and is in a compressed state. Under normal circumstances, the enabling sprocket can be pushed open.

5. The anti-maloperation type sling emergency release device according to claim 4, characterized in that: The enabling sprocket return seat spring is a single spring or a multi-layer spring, and the enabling sprocket return seat spring presses the enabling sprocket open.

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