CN2091851U

CN2091851U - Hook for electric crane used in explosive condition

Info

Publication number: CN2091851U
Application number: CN 90226122
Authority: CN
Inventors: 潘传信
Original assignee: Individual
Current assignee: Individual
Priority date: 1990-12-24
Filing date: 1990-12-24
Publication date: 1992-01-01

Abstract

Disclosed is a hook for an electric crane used in the explosive condition, relating to a matched hook for the electric crane used in the explosive condition, in particular to the matched hook for the electric crane used in the explosive gas condition. In the utility model, the major parts of a hook for a general type electric crane and the composition of the hook for a general type electric crane are reserved, different material with no sparks and different processes are used to implement protection with no sparks on parts in the hook for an electric crane, and the parts in the hook for an electric crane can easily generate metallic sparks. The explosive possibility caused by the metallic sparks generated by the hook in work is stopped, and the hook has two-sided safety for lift and explosion proof in the explosive condition.

Description

Hook for electric crane used in explosive condition

The utility model relates to a kind of in explosive atmosphere, the explosion proof type used for electric hoist cargo hook gear of particularly working in explosive gas atmosphere.

The explosion proof type electric block is a kind of compact conformation, the electronic weight-lifting equipment of small-sized explosive atmosphere.The explosion proof type electric block product of domestic production at present, supporting suspender remain universal used for electric hoist cargo hook gear.

Universal used for electric hoist cargo hook gear, can't avoid in lifting work ground will physical shock and friction take place with extraneous metal, ground: as the both ends of outside face, lifting beam with hook and the sheave shaft of the suspension hook of cargo hook gear and pulley cover, the metal weight that is often hung with quilt in hoisting process, the metal and the ground of loading appliance (automobile, hand barrow etc.) rub mutually, physical shock; And for example suspension hook rubs with metal rigging (steel rope, chain etc.) constantly mutually; The inside face of cargo hook gear middle pulley, pulley cover, pulley cover steel rope wire rope handling indentation, there also often rub with electric block volume poplar steel rope and steel rope fault mutually.Physical shock and friction between these steel material parts just might produce metal sparks.In explosive atmosphere, particularly in explosive gas atmosphere, when the metal sparks that is produced when the physical shock between the steel material part and friction possesses certain fire ignition energy, just might " ignition " and cause the generation of significant explosion accident.Thereby say that though universal used for electric hoist cargo hook gear has possessed enough lifting safety performances, it does not possess the necessary anti-explosion safety performance of working in explosive atmosphere.In explosive atmosphere, particularly in explosive gas atmosphere, if use this universal used for electric hoist cargo hook gear that is easy to generate metal sparks in the course of the work blindly, certainly will the lie dormant great risk of " ignition ", this production safety, the country and people's the security of the lives and property to factory potential huge threat.

Be easy to generate this problem of metal sparks for solving universal used for electric hoist cargo hook gear in hoisting process, the manufacturing firm that has covers one deck rubber at the suspension hook outside face of cargo hook gear; The user who also has is twined the article of rubber and so on the metal rigging.But this method of using rubber and so on material protection on suspension hook or the rigging that is all in, be to be fit to the cargo hook gear work characteristics: one it when hoisting heavy, the metal rigging is line with suspension hook and contacts, rubber and so on material can't bear huge contact stress, thereby in the extremely short time, losing protective effect, the suspension hook outside face still has the possibility that produces metal sparks; It two is that other positions of cargo hook gear remain and may produce metal sparks.Thereby this cargo hook gear that is all in the protection of suspension hook appearance covering rubber does not possess the anti-explosion safety performance of working equally in explosive atmosphere.

The purpose of this utility model will provide a kind of explosive atmosphere used for electric hoist cargo hook gear exactly, and it can prevent the generation of metal sparks effectively in unavoidable physical shock of working process and friction.

The purpose of this utility model is achieved in that under the prerequisite that does not influence the cargo hook gear load-carrying capacity; universal used for electric hoist cargo hook gear is changed a social system; may produce on all sites of metal sparks at universal used for electric hoist cargo hook gear; use corresponding no spark material; the protection of enforcement no spark, thus make the cargo hook gear after the structural development in unavoidable physical shock of working process and friction, can not produce metal sparks.Thereby guarantee in explosive atmosphere, to use safely, become explosive atmosphere with electric block supporting cargo hook gear.

The structure of used for electric hoist cargo hook gear, oad be difference along with its hoisting capacity difference, but still can be divided into two types by its structure: first hoisting capacity is not more than 5 tons short hook cargo hook gear; It two is hoisting capacities greater than 5 tons long hook cargo hook gear.For realizing that the required technical characterictic of the utility model purpose had both interosculated, also variant on these two types of cargo hook gears.

Below in conjunction with the short hook of the explosive atmosphere used for electric hoist that the utility model proposes, long hook cargo hook gear, the center technical matters of narrating the utility model respectively and being solved.

1. for realizing the utility model purpose, common technical characterictic is:

(1) the suspension hook outside face of cargo hook gear is implemented the no spark protection.

The suspension hook outside face is implemented the position of no spark protection, should be that all surfaces of suspension hook below lifting beam with hook is long-pending;

The suspension hook outside face is implemented the method for no spark protection, is with no spark material suspension hook protective cover, and the inside face of protective cover should coincide with the suspension hook outside face or be identical substantially;

The material of suspension hook protective cover, should have certain rigidity and higher allowable contact stress, the material that simultaneously is that manufacturing process is simple and easy again, suspension hook is heated in the manufacturing process, select for use QBe2 cold rolling hard attitude bryllium bronze thin plate then ideal, it is particularly suitable for the cargo hook gear that hoisting capacity is big, work is frequent; The cargo hook gear little for hoisting capacity, that work is not really frequent also can be used the H62 sheet brass.The thickness of selected no spark material is generally 1.5-3mm, big, the frequent big value of getting of working of hoisting capacity;

The making of suspension hook protective cover: the oad of the suspension hook acceptable product of producing according to the electric block special manufacturer; with the suspension hook center of symmetry is the boundary; mould is partly rolled on a making left side and mould is partly rolled on the right side, respectively the thin plate of no spark metallic material is rolled into left half protective cover and right half protective cover.After the calendering deburring, the outer rim of left half protective cover keeps a wide flat side, and the width of flat side is about the big value of getting of 5-8mm(thickness of slab); The outer rim of right half protective cover keeps a wide flat side and contour flange, and the width of its flat side is than the slightly wide 0.5-1mm of left half protective cover flat side, and the flange height is equal to or slightly less than its flat side width.

Suspension hook protective cover fixing on suspension hook: left half protective cover and the right half protective cover protected suspension hook of filling the span of a man's arms; the inside face of protective cover is developed with the suspension hook outside face as much as possible; then the outer rim of the outer rim of a left side half protective cover and right half protective cover is interlocked; wrap firm suspension hook tightly, thus the suspension hook protective cover that left half protective cover and right half protective cover are formed a whole.

(2) adopt the MC monomer cast nylon to make the pulley of cargo hook gear.

The structure of pulley, dimensional characteristic: for the little cargo hook gear of hoisting capacity, its pulley is all made of the MC monomer cast nylon; For the bigger cargo hook gear of hoisting capacity, its pulley can be all made of the MC monomer cast nylon, also can make bearing carrier ring with steel material, and bearing carrier ring or castingin or are compressed into the wheel hub of nylon pulley in nylon pulley.After pulley adopted monomer cast nylon to make, its structure was compared with the cast iron pulley of universal used for electric hoist cargo hook gear, and the width of wheel rim and spoke increases to some extent, and the width of the size of grooving part and wheel hub is all identical with the cast iron pulley.

(3) the pulley cover wire rope handling indentation, there of cargo hook gear is implemented the no spark protection.According to the true form of used for electric hoist cargo hook gear pulley cover wire rope handling indentation, there, with no spark material wire rope handling breach back up ring.The material of wire rope handling breach back up ring can be QBe2, H62 thin plate, also can be magnesium content less than 0.5% rustproof aluminium sheet, but make both economical practicality with the H62 sheet brass that its thickness is about 1-2mm.The width that wire rope handling breach back up ring is embedded in the inside and outside garden of indentation, there perimeter surface is not less than 5mm.

(4) hook nut and lifting beam with hook exposed surface are implemented the no spark protection.With the H62 sheet brass of thickness 1-1.5mm, make tin hat similar and chip shield to the hook nut shape; Tin hat from the top of hook nut, chip shield is from the below of lifting beam with hook; both fill the span of a man's arms exposed surfaces (but should guarantee that suspension hook rotates no jam flexibly) of hook nut and lifting beam with hook; and the projection on the tin hat partly to the chip shield overturning, thereby the surface that hook nut and lifting beam with hook expose is protected reliably with the no spark material.

(5) take similar methods to implement the no spark protection to the inside and outside surface of cargo hook gear pulley cover.The pulley cover of short hook cargo hook gear is made up of two identical pulleys, half cover, and it is a load bearing element important in the cargo hook gear; The pulley of long hook cargo hook gear is covered with two, and every pulley cover is made up of sideslip wheel cover and outside slip wheel cover again, and it is not a load bearing element.But all be to adopt identical no spark material pulley protective cover, the pulley cover outer surface is protected; Adopt simultaneously garden sparring in the identical no spark material again, the interior garden perimeter surface below the sheave shaft center in the pulley cover inner surface is protected.

The no spark of pulley cover outer surface protection: by the true form of the pulley cover of used for electric hoist cargo hook gear (short hook be sideslip wheel cover and outside slip wheel cover for pulley half cover, long hook) or make the calendering mould, the thin plate of non-arcing metal material (as QBe2, H62, magnesium content less than 0.5% rustproof aluminum alloy etc.) is rolled into protection partly cover; Or the making casting mould, arc-free non-metallic material (as monomer cast nylon, polyurethane rubber, folder fabric rubber etc.) casting, become protection half cover (in long hook cargo hook gear, being interior protective case and outer protective cover); The thickness of material, when adopting the non-arcing metal material, the thickness of QBe2 is about 0.8-1.5mm, and the thickness of H62 is about 1-2mm, and the thickness of rustproof aluminium sheet is about 1.5-2.5mm; Play great, the frequent big value of getting of working; When adopting arc-free non-metallic material, its thickness is not less than 3-5mm; In short hook cargo hook gear, two protection half covers pulley cover of filling the span of a man's arms, in long hook cargo hook gear, interior protective case and the outer protective cover pulley cover of filling the span of a man's arms, thus formed the pulley protective cover, finish the no spark of cargo hook gear pulley cover outer surface is protected.

The no spark protection of the interior garden perimeter surface in the pulley cover inner surface below the sheave shaft center: employing thickness is that the H62 brass plate billot of 1-1.5mm is rolled into certain garden arcuation; garden sparring in making; with the welding method of brass welding wire gas welding intermittent weld, or cover in the pulley cover inner surface on the perimeter surface of the interior garden of sheave shaft central lower with the method for brass rivet riveted joint.

(6) adopt the H62 sheet brass to make the chromium board, use brass rivet that the chromium board is riveted on the pulley protective cover.

2. for the short hook of explosive atmosphere used for electric hoist, long hook cargo hook gear, be the realization the purpose of this utility model, different technical characterictics is pulley protective cover incomplete same fixing means on the pulley cover.

In the short hook cargo hook gear of explosive atmosphere used for electric hoist, the pulley protective cover is filled the span of a man's arms by two identical protections, half cover and is formed, and the position of its protection is not full of the outside face of pulley cover, and is the both ends of sheave shaft both ends and lifting beam with hook.Below protection half cover, be provided with 2-3 place hooked projection; hook the below of pulley half cover; and be to be that the screw 3-5 of M5-M6 only is fixed on pulley half and covers with diameter above protection half cover; but screw should be to make of H62 brass, and the position of screw hole should partly to cover load-carrying capacity be prerequisite can not weaken pulley.When adopting arc-free non-metallic material making protection partly to cover, should below screw, make pad, and take locking measure with H62 brass billot.

In the long hook cargo hook gear of explosive atmosphere used for electric hoist, every pulley protective cover then is to be filled the span of a man's arms by inboard protective case and outside protective case to form.Wherein inboard protective case central authorities are porose, can pass through sheave shaft; There is garden shape projection in outside protective case central authorities, can cover the axle head part that sheave shaft exposes.They are that the brass screw 3-6 of M5-M6 only is fixed on the garden of sideslip wheel cover and outside slip wheel cover on week in uniform way with diameter respectively.

Because the utility model does not destroy the carrying structure of universal used for electric hoist cargo hook gear, and in implementing no spark protection process, may not weaken the PROCESS FOR TREATMENT of its load-carrying capacity through heating, pressurization etc. to the main load bearing element of cargo hook gear, so after implementing the no spark protection, still keeping original lifting safety performance; Simultaneously because the position that institute might produce metal sparks on the cargo hook gear all adopts generally acknowledged at present no spark materials to award protection, so in unavoidable physical shock of its working process and friction, can not produce metal sparks, thereby possessed in explosive atmosphere the anti-explosion safety performance of particularly in explosive gas atmosphere, working;

The utility model preferentially adopts QBe2 cold rolling hard attitude bryllium bronze thin plate; make the suspension hook protective cover with calendaring molding, snap fastener bonded assembly method; because QBe2 cold rolling hard attitude bryllium bronze plate has higher hardness (HB reaches more than 300) and higher allowable contact stress; thereby have the incomparable advantage of other no spark materials, be particularly suitable for no spark protection to the suspension hook surface.So have higher wear-corrosion resistance and advantages of high bearing capacity, the process means of implementing the no spark protection is fairly simple, is easy to realize, implements in the no spark protection process the quality of suspension hook own without any influence.Particularly importantly, after the wearing and tearing of suspension hook protective cover, can in explosive atmosphere, change safely very easily.

The utility model adopts MC type monomer cast nylon to make pulley, because the MC monomer cast nylon is the no spark material of present excellent in abrasion resistance of generally acknowledging, make car hosit with the MC monomer cast nylon and have precedent and standard (ZBJ80010.2-88) with pulley, make the pulley of explosive atmosphere used for electric hoist cargo hook gear so adopt the MC monomer cast nylon, using in the friction of steel rope and fracture of wire thereof with the electric block elevator, can not produce metal sparks, and has higher service life than the cast iron pulley on the universal used for electric hoist cargo hook gear, alleviated the pulley deadweight, made the utility model constant basically with respect to the deadweight of the universal used for electric hoist cargo hook gear of same specification.

The utility model is taked different manufacture crafts, thereby is had better economic and feasibility owing to select different no spark materials for use according to the different bearer characteristics of part.

The utility model, because to increase certain manufacturing cost, exchanged the high safety reliability that in explosive atmosphere, uses for, can get rid of effectively, thereby had important social benefit and economic benefit because of cargo hook gear is easy to generate the hidden danger that metal sparks causes explosion accident.

Concrete structure of the present utility model, owing to relate to short hook and two kinds of structural shapes of long hook, thereby provide by following example and accompanying drawing respectively.

Fig. 1 and Fig. 2 are that wherein Fig. 1 is a semisectional view according to the constructional drawing of the short hook cargo hook gear of the explosive atmosphere used for electric hoist that the utility model proposes, and Fig. 2 is a part sectional view.

Below in conjunction with Fig. 1 and Fig. 2, explain concrete composition according to the short hook cargo hook gear of the explosive atmosphere used for electric hoist that the utility model proposes.

Among Fig. 1, bearing spacer ring (1), bearing (2), sheave shaft (3), disk spring (4), shaft-use elastic gear ring (5) and (11), hook nut (6), check pin (7), surface bearing (8), lifting beam with hook (9), suspension hook parts such as (10), identical with corresponding part on the universal used for electric hoist cargo hook gear of specification of the same race (the above-mentioned part of the cargo hook gear that different manufacturers is produced is slightly variant).Different is that the outside face of suspension hook protects with suspension hook protective cover (12); Pulley (13) is made with the MC monomer cast nylon; Fill the span of a man's arms into a pulley cover by two identical pulleys of shape, half cover (14), two identical protections, half cover (15) pulley half cover of filling the span of a man's arms is formed a pulley protective cover, below protection half cover, there is 2-3 place hooked projection (16) to hook the below of pulley half cover, brass screw that is M5-M6 with 3-5 diameter (17) and spring washer (18) are fixed on protection half cover on pulley half cover then, thereby pulley half cover, the end of sheave shaft and the end of lifting beam with hook all cover and protect; Tin hat (19) covers hook nut from the top of hook nut and encases the garden cylinder of lifting beam with hook, chip shield (20) develops with the lifting beam with hook lower surface, the projection on the tin hat partly (21) to the chip shield overturning, thereby the exposed surface of hook nut and lifting beam with hook is protected; (22) be to make, the chromium board partly covered riveting together with protecting with the rivet (23) of no spark material of the H62 brass plate of thick 1mm.Above-mentioned suspension hook protective cover, (pulley half cover with) protection half cover, (hook nut with) tin hat and chip shield all are to form with the no spark material.

Among Fig. 2, (pulley cover wire rope handling breach with) back up ring 24 is embedded in pulley and partly covers 14 wire rope handling indentation, there, and it is to make with the non-arcing metal material, and the steel material of pulley cover wire rope handling indentation, there is protected; Interior garden sparring 25 is to make with the brass plate of 1-1.5mm, covers in pulley half cover inner surface on the perimeter surface of the interior garden of sheave shaft central lower with the method for the welding method of brass welding wire gas welding intermittent weld or brass rivet riveted joint.

Fig. 3 is the composition scheme drawing of suspension hook protective cover, and (a) is the scheme drawing of left half protective cover among the figure, and A-A is the suspension hook symmetrical center line, the width K of its outer rim flat side, and K is about 5-8mm; (b) is the scheme drawing of right half protective cover among the figure, and A-A is the suspension hook symmetrical center line, and its outer rim flat side width should can cover the outer rim of left half protective cover when filling the span of a man's arms suspension hook; (c) is the part sectional view of the outer rim interlock seam of left half protective cover and right half protective cover among the figure, and the interlock seam should be smooth, and interlock is firm closely.

Fig. 4 is that wherein (a) is integral type, all makes of the MC monomer cast nylon with the constructional drawing of the pulley of MC monomer cast nylon making, and bearing (2) directly is pressed in the wheel hub bore of pulley 13; (b) be insert type, the bearing carrier ring of steel 26 and pulley castingin together, bearing is pressed in the bearing carrier ring; (c) be the edge shell type, bearing carrier ring 26 directly is pressed in the wheel hub bore of pulley.For the cargo hook gear pulley of little hoisting capacity, can only be integral type.

Fig. 5 is the scheme drawing of pulley cover wire rope handling breach back up ring, and wherein R equals the pulley cover inner surface radius of curvature in garden week, thickness b should be slightly larger than pulley half cover and protective case thickness and, width c is not less than 5mm.

Fig. 6 is the constructional drawing according to the long hook cargo hook gear of explosive atmosphere used for electric hoist that the utility model proposes.Bearing spacer ring (1), bearing (2), sheave shaft (being again lifting beam with hook) (3), disk spring (4), shaft-use elastic gear ring (5), hook nut (6), check pin (7), surface bearing (8), suspension hook parts such as (9) are identical with the corresponding part of the long hook cargo hook gear of the universal used for electric hoist of same size.The outside face of different is suspension hook protects with suspension hook protective cover (10); Pulley (11) is to make with the MC monomer cast nylon; It has two pulley covers (12), every pulley cover is again to be combined by sideslip wheel cover (13) and outside slip wheel cover (14), and brass screw (17) that inboard protective case (15) and outside protective case (16) are M5-M6 with 3-6 diameter respectively and spring washer (18) are fixed on sideslip wheel cover and the outside slip wheel cover; With tin hat (19) and chip shield (20) hook nut and lifting beam with hook (being the sheave shaft middle part) are protected; Interior garden sparring (21) is rolled into half garden shape, covers pulley cover inner surface garden on week with the welding method of brass welding wire gas welding intermittent weld or the method for brass rivet riveted joint.Inlay back up ring (22) in pulley cover wire rope handling indentation, there.Above-mentioned suspension hook protective cover, (the pulley cover is used) inboard protective case and outside protective case, interior garden sparring, (the wire rope handling breach is used) back up ring all are to use the no spark material.

Claims

1, in explosive atmosphere; the explosion proof type used for electric hoist cargo hook gear of particularly in explosive gas atmosphere, working; it is made up of with parts such as locking devices sheave shaft, bearing, disk spring, circlip for shaft, suspension hook, lifting beam with hook, hook nut; the size shape of these parts and structure are formed identical with the universal used for electric hoist cargo hook gear of same specification; but may produce on the position of physical shock and friction at them; implemented the no spark protection, it is characterized in that:

The outside face of suspension hook covers arc-free protective cover;

Make the pulley that cargo hook gear is used with the MC monomer cast nylon;

On the exposed surface of hook nut, lifting beam with hook, protect with copper cap and copper washer;

Outside face at the pulley cover covers arc-free protective case, and the garden covers arc-free sparring on week in the pulley cover of sheave shaft central lower, inlays arc-free back up ring in pulley cover wire rope handling breach year;

Make nameplate with sheet brass, and be riveted on the protective case with brass rivet.

2, cargo hook gear according to claim 1 is characterized in that, the protective cover that the suspension hook outside face is covered is to make with the non-arcing metal material; On the cargo hook gear big in hoisting capacity, that work is frequent, use QBe2 bryllium bronze cold rolling hard attitude thin plate; On the cargo hook gear little in hoisting capacity, that work is not frequent, use the H62 sheet brass.

3, cargo hook gear according to claim 1 is characterized in that, the position that protective cover covered should be that all surfaces of suspension hook below lifting beam with hook is long-pending.

4, cargo hook gear according to claim 1; it is characterized in that; the protective cover of suspension hook surface coverage; form by a left side half protective cover and right half protective cover; the outer rim of a left side half protective cover and right half protective cover fuses through the flange interlock, and the inside face of protective cover and the outside face of suspension hook coincide or be identical substantially.

5, cargo hook gear according to claim 1 is characterized in that, its pulley is to make of the MC monomer cast nylon; On the big cargo hook gear of hoisting capacity, pulley can all adopt the MC monomer cast nylon to make, and the bearing carrier ring castingin that also can adopt steel can also directly be pressed into the bearing carrier ring of steel in the wheel hub of nylon pulley on the wheel hub of nylon pulley; On the little cargo hook gear of hoisting capacity, pulley all adopts the MC monomer cast nylon to make.

6, cargo hook gear according to claim 1, it is characterized in that, on the exposed surface of hook nut, lifting beam with hook, it is that the H62 sheet brass of 1～1.5mm is made cap and copper washer that thickness is arranged, the copper calotte is lived the post side, garden of the whole exposed faces and the lifting beam with hook of hook nut, the overturning to the inside of the projection of copper sheathing bottom is close to copper washer on the garden ring end face of lifting beam with hook below.

7, cargo hook gear according to claim 1, it is characterized in that, the protective case that is covered on its pulley cover outer surface, when cargo hook gear is the weak point hook, protective case then is made up of two identical protections, half cover, adopt brass screw and hooked projection to be fixed on pulley half cover, the end of the pulley cover outer surface of cargo hook gear, sheave shaft, the end of lifting beam with hook are all covered; When cargo hook gear was long hook, protection was covered with two, is made up of interior protective case and outer protective cover again for every, and the pulley cover outer surface of cargo hook gear, the end of sheave shaft are covered.

8, cargo hook gear according to claim 1; it is characterized in that; the protective case that its pulley cover outer surface is covered; be left half protective case, right half protective case; or interior protective case, outer protective cover, can form through calendering less than 0.5% rustproof aluminum alloy thin plate with QBe2 bryllium bronze cold rolling hard attitude thin plate, H62 sheet brass, magnesium content, can also form through the casting mold pressing with MC monomer cast nylon, polyurethane rubber, folder fabric rubber.

9, cargo hook gear according to claim 1; it is characterized in that; the sparring that is covered on the side face of garden in the pulley cover below its sheave shaft center; be curling the forming of brass plate billot with thickness 1～1.5mm; sparring is with the welding method of copperwelding rod gas welding intermittent weld or with the method for brass rivet riveted joint, covers on protected of pulley cover.

10, cargo hook gear according to claim 1; it is characterized in that; the back up ring that its pulley cover wire rope handling indentation, there is inlayed; be with QBe2 bryllium bronze, H62 brass, magnesium content thin plate less than 0.5% materials such as rustproof aluminum alloy; true form according to pulley cover wire rope handling breach; make the waist shape circle of garden arcuation, be embedded in the wire rope handling indentation, there.